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Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
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1

Covered Product Category: Fluorescent Ballasts | Department of...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

can achieve large energy savings by moderating the timing and light output of lighting systems. Fluorescent lamp ballasts should have a ballast factor between 85% and 105% in...

2

Covered Product Category: Fluorescent Ballasts  

Energy.gov (U.S. Department of Energy (DOE))

FEMP provides acquisition guidance and Federal efficiency requirements across a variety of product categories, including fluorescent ballasts, which are a FEMP-designated product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

3

ISSUANCE 2014-12-29: Energy Conservation Program: Clarification for Energy Conservation Standards and Test Procedures for Fluorescent Lamp Ballasts  

Energy.gov (U.S. Department of Energy (DOE))

Energy Conservation Program: Clarification for Energy Conservation Standards and Test Procedures for Fluorescent Lamp Ballasts

4

Fluorescent ballast and lamp disposal issues  

SciTech Connect

All around the world, governments, utility companies, and private businesses are attempting to reduce the amount of energy consumed. In the US alone, new economic strategies and programs are being created to facilitate this process. For instance, the recent enactment of the National Energy Policy Act, the Environmental Protection Agency`s (EPA) Green Lights Program, and a surge of utility involvement in Demand Side Management (DSM) Commercial/Industrial Direct Install and Rebate Programs. Many of these problems target commercial/industrial lighting system retrofits as one of the most cost effective avenues for reducing the consumption of energy. Due to this trend, hundreds of millions of lighting ballasts and lamps are being discarded. The benefits of these programs result in enormous reductions in fossil fuels (and subsequent carbon dioxide, sulfur dioxide, and nitrogen oxide emissions) required to generate the displaced electricity. Throughout the US, however, there is an increasing concern for the environmental impacts surrounding the accelerated disposal of both lighting ballasts and lamps. Regulations initially established were for a one by one, retirement (failure) process rather than promoted obsolescence and forced retirement of lamp groups or entire systems (truckloads of old technologies). Recognizing this trend and the potential negative environmental effects, federal, state, and local regulators are reevaluating the impacts and are being asked to promulgate policies to specifically address this situation.

Leishman, D.L. [Alta Resource Management Services, Inc., Springfield, MA (United States)

1996-12-01T23:59:59.000Z

5

The Energy Efficiency of the U.S Fluorescent Lamp Ballast Industry  

NLE Websites -- All DOE Office Websites (Extended Search)

The Energy Efficiency of the U.S Fluorescent Lamp Ballast Industry The Energy Efficiency of the U.S Fluorescent Lamp Ballast Industry Speaker(s): Francis Rubinstein Date: February 14, 2008 - 12:00pm Location: 90-3122 Fluorescent lamp ballasts are subject to DOE appliance standards and rulemaking. But currently, only ballasts for older fluorescent lamp types, such as T-12 lamps are subject to minimum efficacy limits. The majority of fluorescent lamps now being shipped (T-8 and T-5 types) type are operated by ballasts that will not be subject to DOE rule until 2011. The metric used by DOE for characterizing the electrical efficiency of the fluorescent lamp-ballast system is called Ballast Efficacy Factor (BEF). Because BEF is not normalized, it is of limited utility for rulemaking and is useless for procurement. But by normalizing BEF to the total lamp power, I have

6

Compact Fluorescent Plug-In Ballast-in-a-Socket  

SciTech Connect

The primary goal of this program was to develop a ballast system for plug-in CFLs (compact fluorescent lamps) that will directly replace standard metal shell, medium base incandescent lampholders (such as Levition No. 6098) for use with portable lamp fixtures, such as floor, table and desk lamps. A secondary goal was to identify a plug-in CFL that is optimized for use with this ballast. This Plug-in CFL Ballastin-a-Socket system will allow fixture manufacturers to easily manufacture CFL-based high-efficacy portable fixtures that provide residential and commercial consumers with attractive, cost-effective, and energy-efficient fixtures for use wherever portable incandescent fixtures are used today. The advantages of this proposed system over existing CFL solutions are that the fixtures can only be used with high-efficacy CFLs, and they will be more attractive and will have lower life-cycle costs than screw-in or adapter-based CFL retrofit solutions. These features should greatly increase the penetration of CFL's into the North American market. Our work has shown that using integrated circuits it is quite feasible to produce a lamp-fixture ballast of a size comparable to the current Edison-screw 3-way incandescent fixtures. As for price points for BIAS-based fixtures, end-users polled by the Lighting Research Institute at RPI indicated that they would pay as much as an additional $10 for a lamp containing such a ballast. The ballast has been optimized to run with a 26 W amalgam triple biax lamp in the base-down position, yet can accept non-amalgam versions of the lamp. With a few part alterations, the ballast can be produced to support 32 W lamps as well. The ballast uses GE's existing L-Comp[1] power topology in the circuit so that the integrated circuit design would be a design that could possibly be used by other CFL and EFL products with minor modifications. This gives added value by reducing cost and size of not only the BIAS, but also possibly other integral CFL and future dimmable integral and plug-in versions of the EFL products.

Rebecca Voelker

2001-12-21T23:59:59.000Z

7

Zero energy-storage ballast for compact fluorescent lamps  

DOE Patents (OSTI)

A CFL ballast includes complementary-type switching devices connected in series with their gates connected together at a control node. The switching devices supply a resonant tank circuit which is tuned to a frequency near, but slightly lower than, the resonant frequency of a resonant control circuit. As a result, the tank circuit restarts oscillations immediately following each zero crossing of the bus voltage. Such rapid restarts avoid undesirable flickering while maintaining the operational advantages and high efficacy of the CFL ballast. 4 figs.

Schultz, W.N.; Thomas, R.J.

1999-08-31T23:59:59.000Z

8

2015-01-28 Issuance: Test Procedure for Fluorescent Lamp Ballasts; Final Rule Correction  

Energy.gov (U.S. Department of Energy (DOE))

This document is a pre-publication Federal Register final rule correction regarding test procedures for fluorescent lamp ballasts, as issued by the Deputy Assistant Secretary for Energy Efficiency on January 28, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

9

2014-10-14 Issuance: Test Procedures Correction for Fluorescent Lamp Ballasts; Notice of Proposed Rulemaking  

Energy.gov (U.S. Department of Energy (DOE))

This document is a pre-publication Federal Register notice of proposed rulemaking regarding test procedures for fluorescent lamp ballasts, as issued by the Deputy Assistant Secretary for Energy Efficiency on October 14, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

10

Medium Base Compact Fluorescent Lamps | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Templates for Reporting Test Results mediumbasecfltestreporttemplatev1.1.xlsx More Documents & Publications Fluorescent Lamp Ballasts Showerheads Beverage Vending Machines...

11

2014-10-14 Issuance: Test Procedures Correction for Fluorescent...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

10-14 Issuance: Test Procedures Correction for Fluorescent Lamp Ballasts; Notice of Proposed Rulemaking 2014-10-14 Issuance: Test Procedures Correction for Fluorescent Lamp...

12

Oregon Ballast Water Task Force Report on Ballast Water Management in Oregon  

E-Print Network (OSTI)

Oregon Ballast Water Task Force Report on Ballast Water Management in Oregon #12;Oregon Ballast Water Task Force Report on Ballast Water Management in Oregon Prepared for the Oregon State Legislature October 2006 #12;Report on Ballast Water Management in Oregon-2006 Acknowledgements We would like to thank

13

Fully Integrated Ballast Controller with  

E-Print Network (OSTI)

Global Research (through CoPEC) and the Department of Energy's National Energy Technology Laboratory. Simplified block diagram of the two primary control loops in the ballast IC: (I) inner phase control and (2

14

Effective Ship Ballast Water Treatment System Management  

Science Journals Connector (OSTI)

Besides its great effect on ship stability, ballast water causes an important problem. While a ship loads ballast water from any sea, it ... species. These species may have a great effect on the local ecological ...

Levent Bilgili; Kaan Ünlügenço?lu…

2013-01-01T23:59:59.000Z

15

Uncertainty and sensitivity analyses of ballast life-cycle cost and payback period  

SciTech Connect

The paper introduces an innovative methodology for evaluating the relative significance of energy-efficient technologies applied to fluorescent lamp ballasts. The method involves replacing the point estimates of life cycle cost of the ballasts with uncertainty distributions reflecting the whole spectrum of possible costs, and the assessed probability associated with each value. The results of uncertainty and sensitivity analyses will help analysts reduce effort in data collection and carry on analysis more efficiently. These methods also enable policy makers to gain an insightful understanding of which efficient technology alternatives benefit or cost what fraction of consumers, given the explicit assumptions of the analysis.

McMahon, James E.; Liu, Xiaomin; Turiel, Ike; Hakim, Sajid; Fisher, Diane

2000-06-01T23:59:59.000Z

16

Report on the Oregon Ballast Water Management Program in 2004  

E-Print Network (OSTI)

Report on the Oregon Ballast Water Management Program in 2004 #12;Acknowledgements We would like Ballast Water Management Program in 2004 Produced for the Oregon State Legislature By The Oregon Ballast State University September 2004 #12;Report on Oregon Ballast Water Management Program 2004 Executive

17

The effects of supply harmonics on the performance of compact fluorescent lamps  

SciTech Connect

This paper describes a performance evaluation of ten compact fluorescent lighting systems operated with sinusoidal and distorted voltage waveform conditions. The lamps were either provided with an electronic ballast, a magnetic core ballast or a magnetic core ballast with a power factor correction circuit. The test results show that the electrical performance of the compact fluorescent lamps for both sinusoidal and distorted voltage waveform operation is related to the different types of ballast used. The cost of operation of these compact fluorescent lamps was calculated and compared to the cost of a conventional 60 W incandescent lamp.

Arseneau, R.; Ouellette, M.

1993-04-01T23:59:59.000Z

18

EFFECT OF COAL DUST ONEFFECT OF COAL DUST ON RAILROAD BALLAST STRENGTHRAILROAD BALLAST STRENGTH  

E-Print Network (OSTI)

1 EFFECT OF COAL DUST ONEFFECT OF COAL DUST ON RAILROAD BALLAST STRENGTHRAILROAD BALLAST STRENGTH for Laboratory StudyFouling Mechanism / Need for Laboratory Study Mechanical Properties of Coal DustMechanical Properties of Coal Dust Grain Size AnalysisGrain Size Analysis AtterbergAtterberg LimitsLimits Specific

Barkan, Christopher P.L.

19

New and Underutilized Technology: HID Electronic/Dimming Ballasts |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

HID Electronic/Dimming Ballasts HID Electronic/Dimming Ballasts New and Underutilized Technology: HID Electronic/Dimming Ballasts October 7, 2013 - 8:51am Addthis The following information outlines key deployment considerations for HID electronic/dimming ballasts within the Federal sector. Benefits Most HID electronic/dimming ballasts, typically metal halide or high-pressure sodium lamps, are currently driven by magnetic ballasts. Several manufacturers now offer electronic ballasts for these lamps, which promise better efficiency, longer lamp life, and faster startup and re-strike. Application HID electronic/dimming ballasts are applicable in exterior/security lighting and facilities with high bay areas. Key Factors for Deployment Federal agencies must evaluate relative costs, benefits, and application of

20

SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic  

NLE Websites -- All DOE Office Websites (Extended Search)

Innovative Ballasted Flat Roof Innovative Ballasted Flat Roof Solar Photovoltaic Racking System to someone by E-mail Share SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Facebook Tweet about SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Twitter Bookmark SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Google Bookmark SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Delicious Rank SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on Digg Find More places to share SunShot Initiative: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System on AddThis.com... Concentrating Solar Power Photovoltaics

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Fluorescent Lighting Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fluorescent Lighting Basics Fluorescent Lighting Basics Fluorescent Lighting Basics October 17, 2013 - 5:39pm Addthis Light from a fluorescent lamp is first created by an electric current conducted through an inert gas producing ultraviolet light that is invisible to the human eye. The ultraviolet light in turn interacts with special blends of phosphors coating the interior surface of the fluorescent lamp tube that efficiently converts the invisible light into useful white light. Fluorescent lamps require a special power supply called a ballast that is needed to regulate lamp operating current and provide a compatible start-up voltage. Electronic ballasts perform the same function as a magnetic ballast but outperform the outdated magnetic products by operating at a very high frequency that eliminates flicker and noise while

22

Report on the Oregon Ballast Water Management Program  

E-Print Network (OSTI)

Report on the Oregon Ballast Water Management Program in 2002 #12;Report on the Oregon Ballast Water Management Program in 2002 Produced for the Oregon State Legislature by Jordan Vinograd and Mark Water Task Force December 2002 #12;Report on Oregon Ballast Water Management Program in 2002 i Executive

23

Lighting Group: Sources and Ballasts: HID Lighting Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Ballasts and Controls for HID Lighting Ballasts and Controls for HID Lighting Systems Evaluation of Electronic Ballasts and Related Controls for HID Lighting Systems Objective HID ballast The goal of this project is to evaluate the potential of electronic ballasts and related controls for HID lighting systems to improve the efficiency of current technology. The specific objectives of this project are to: Test, analyze and determine the potential of electronic ballasts for HID lighting systems in cooperation with manufacturers as an emerging energy efficient technology to reduce lighting loads in commercial, industrial and municipal applications. Identify control strategies to further improve the energy efficiency of these systems with a municipal partner. Provide appropriate recommendations for incorporating these technologies into current state codes and regulations.

24

Compact fluorescent lamp using horizontal and vertical insulating septums and convective venting geometry  

DOE Patents (OSTI)

A novel design is described for a compact fluorescent lamp, including a lamp geometry which will increase light output and efficacy of the lamp in a base down operating position by providing horizontal and vertical insulating septums positioned in the ballast compartment of the lamp to provide a cooler coldspot. Selective convective venting provides additional cooling of the ballast compartment. 9 figs.

Siminovitch, M.

1998-02-10T23:59:59.000Z

25

Fluorescent Lighting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fluorescent Lighting Fluorescent Lighting Fluorescent Lighting October 17, 2013 - 5:44pm Addthis Fluorescent Lighting Fluorescent Lighting Fluorescent lamps use 25%-35% of the energy used by incandescent products to provide a similar amount of light. They also last about 10 times longer (7,000-24,000 hours). The two general types of fluorescent lamps are: Compact fluorescent lamps (CFLs) -- commonly found with integral ballasts and screw bases, these are popular lamps often used in household fixtures Fluorescent tube and circline lamps -- typically used for task lighting such as garages and under cabinet fixtures, and for lighting large areas in commercial buildings. CFLs CFLs combine the energy efficiency of fluorescent lighting with the convenience and popularity of incandescent fixtures. CFLs fit most fixtures

26

Custom Spectral Shaping for EMI Reduction in Electronic Ballasts  

E-Print Network (OSTI)

modulating waveforms, for custom spectral shaping of the fundamental harmonic of electronic ballastsCustom Spectral Shaping for EMI Reduction in Electronic Ballasts Sandra Johnson, Yan Yin, Regan Zane Colorado Power Electronics Center University of Colorado at Boulder Boulder, Colorado 80309

27

Computational Modeling of Ballast Tanks to Improve Understanding and Maximize Effectiveness of Management Practices and Treatment  

E-Print Network (OSTI)

Computational Modeling of Ballast Tanks to Improve Understanding and Maximize Effectiveness tanks exchange coastal ballast water with mid-ocean seawater (referred to as "ballast water exchange of high-resolution computational fluid dynamics (CFD) to model ballast tank water flow and to predict EE

28

Remediation plan for fluorescent light fixtures containing polychlorinated biphenyls (PCBs)  

SciTech Connect

This report describes the remedial action to achieve compliance with 29 CFR 1910 Occupational Safety and Health Administration (OSHA) requirements of fluorescent light fixtures containing PCBs at K-25 site. This remedial action is called the Remediation Plan for Fluorescent Light Fixtures Containing PCBs at the K-25 Site (The Plan). The Plan specifically discusses (1) conditions of non-compliance, (2) alternative solutions, (3) recommended solution, (4) remediation plan costs, (5) corrective action, (6) disposal of PCB waste, (7) training, and (8) plan conclusions. The results from inspections by Energy Systems personnel in 2 buildings at K-25 site and statistical extension of this data to 91 selected buildings at the K-25 site indicates that there are approximately 28,000 fluorescent light fixtures containing 47,036 ballasts. Approximately 38,531 contain PCBs and 2,799 of the 38,531 ballasts are leaking PCBs. Review of reportable occurrences at K-25 for the 12 month period of September 1990 through August 1991 shows that Energy Systems personnel reported 69 ballasts leaking PCBs. Each leaking ballast is in non-compliance with 29 CFR 1910 - Table Z-1-A. The age of the K-25 facilities indicate a continued and potential increase in ballasts leaking PCBs. This report considers 4 alternative solutions for dealing with the ballasts leaking PCBs. The advantages and disadvantages of each alternative solution are discussed and ranked using cost of remediation, reduction of health risks, and compliance with OSHA as criteria.

NONE

1992-04-30T23:59:59.000Z

29

Energy saving in lighting system with fuzzy logic controller which uses light-pipe and dimmable ballast  

Science Journals Connector (OSTI)

Approximately, 20% of the electricity consumed in the world is spent for lighting. More efficient utilization of the sun, as a natural source of light, for lighting would save electricity used for lighting. The aim of this study is to illuminate a windowless room via a light-pipe and dimmable electronic ballasts. Light-pipe is used for the illumination of the space during the daytime. In case of inadequate daylight, artificial lighting is made via dimmable electronic ballasts and fluorescence lamps. Artificial lighting is supervised by a fuzzy logic control system to keep the illumination level at 350 lux. When there is a motion in the room, the system works with the message of the motion sensor, which, thereby, enables energy saving. Additionally, dimming the lamps result in conversation of the electrical energy used for illumination. After the experimental studies, 350 lux value targeted in the work plane is achieved with ±10 lux error.

Sertaç Görgülü; Nazmi Ekren

2013-01-01T23:59:59.000Z

30

Replacing Incandescent Lightbulbs and Ballasts | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Incandescent Lightbulbs and Ballasts Incandescent Lightbulbs and Ballasts Replacing Incandescent Lightbulbs and Ballasts July 29, 2012 - 5:16pm Addthis Many incandescent lightbulbs can be replaced with more energy efficient options. | Photo courtesy of ©iStockphoto.com/ClarkandCompany. Many incandescent lightbulbs can be replaced with more energy efficient options. | Photo courtesy of ©iStockphoto.com/ClarkandCompany. What does this mean for me? For the greatest energy efficiency, use new fixtures with new lightbulbs. Replace A-type lightbulbs with more energy-efficient options such as CFLs, LEDs, and energy-saving (halogen) incandescents. Matching replacement lightbulbs to existing fixtures and ballasts can be tricky, especially with older fixtures. Using new fixtures made for new lightbulbs gives you the greatest energy savings, reliability, and

31

Replacing Incandescent Lightbulbs and Ballasts | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Replacing Incandescent Lightbulbs and Ballasts Replacing Incandescent Lightbulbs and Ballasts Replacing Incandescent Lightbulbs and Ballasts July 29, 2012 - 5:16pm Addthis Many incandescent lightbulbs can be replaced with more energy efficient options. | Photo courtesy of ©iStockphoto.com/ClarkandCompany. Many incandescent lightbulbs can be replaced with more energy efficient options. | Photo courtesy of ©iStockphoto.com/ClarkandCompany. What does this mean for me? For the greatest energy efficiency, use new fixtures with new lightbulbs. Replace A-type lightbulbs with more energy-efficient options such as CFLs, LEDs, and energy-saving (halogen) incandescents. Matching replacement lightbulbs to existing fixtures and ballasts can be tricky, especially with older fixtures. Using new fixtures made for new

32

Performance of Geogrid Reinforced Ballast under Dynamic Loading  

E-Print Network (OSTI)

Railroad ballast consists of open graded crushed stone used as a bed for railroad track to provide stability. It plays a significant role in providing support for the track base and distributing the load to the weaker ...

Jowkar, Milad

2011-12-31T23:59:59.000Z

33

Disinfection of Ballast Water with Iron Activated Persulfate  

Science Journals Connector (OSTI)

The lack of harmful byproducts produced during application makes PS an attractive alternative to other biocides currently in use for ballast water treatments and merits further testing at a larger scale. ... Waldemer, R. H.; Tratnyek, P. G.; Johnson, R. L.; Nurmi, J. T.Oxidation of chlorinated ethenes by heat-activated persulfate: kinetics and products Environ. ... Here, the authors examine the efficacy of the ballast water biocides SeaKleen and Peraclean Ocean, and the chlorine dioxide biocide Vibrex. ...

Samyoung Ahn; Tawnya D. Peterson; Jason Righter; Danielle M. Miles; Paul G. Tratnyek

2013-09-11T23:59:59.000Z

34

Lightweight, self-ballasting photovoltaic roofing assembly  

DOE Patents (OSTI)

A photovoltaic roofing assembly comprises a roofing membrane (102), a plurality of photovoltaic modules (104, 106, 108) disposed as a layer on top of the roofing membrane (102), and a plurality of pre-formed spacers, pedestals or supports (112, 114, 116, 118, 120, 122) which are respectively disposed below the plurality of photovoltaic modules (104, 106, 108) and integral therewith, or fixed thereto. Spacers (112, 114, 116, 118, 120, 122) are disposed on top of roofing membrane (102). Membrane (102) is supported on conventional roof framing, and attached thereto by conventional methods. In an alternative embodiment, the roofing assembly may have insulation block (322) below the spacers (314, 314', 315, 315'). The geometry of the preformed spacers (112, 114, 116, 118, 120, 122, 314, 314', 315, 315') is such that wind tunnel testing has shown its maximum effectiveness in reducing net forces of wind uplift on the overall assembly. Such construction results in a simple, lightweight, self-ballasting, readily assembled roofing assembly which resists the forces of wind uplift using no roofing penetrations.

Dinwoodie, Thomas L. (Berkeley, CA)

1998-01-01T23:59:59.000Z

35

Lightweight, self-ballasting photovoltaic roofing assembly  

DOE Patents (OSTI)

A photovoltaic roofing assembly comprises a roofing membrane (102), a plurality of photovoltaic modules (104, 106, 108) disposed as a layer on top of the roofing membrane (102), and a plurality of pre-formed spacers, pedestals or supports (112, 114, 116, 118, 120, 122) which are respectively disposed below the plurality of photovoltaic modules (104, 106, 108) and integral therewith, or fixed thereto. Spacers (112, 114, 116, 118, 120, 122) are disposed on top of roofing membrane (102). Membrane (102) is supported on conventional roof framing, and attached thereto by conventional methods. In an alternative embodiment, the roofing assembly may have insulation block (322) below the spacers (314, 314', 315, 315'). The geometry of the preformed spacers (112, 114, 116, 118, 120, 122, 314, 314', 315, 315') is such that wind tunnel testing has shown its maximum effectiveness in reducing net forces of wind uplift on the overall assembly. Such construction results in a simple, lightweight, self-ballasting, readily assembled roofing assembly which resists the forces of wind uplift using no roofing penetrations.

Dinwoodie, T.L.

1998-05-05T23:59:59.000Z

36

Performance of "Ultra-High" Efficient Electronic Ballast for HID Lamps  

E-Print Network (OSTI)

. Index Terms--Electronic ballast, HID lamps, resonant inverter, power loss modeling, Silicon Carbide (Si of >95% for the ballast. Diode bridge rectifier EMI filter Resonant Inverter Power Factor Correction 75423, USA Abstract--A new electronic ballast circuit for High Intensity Discharge (HID) lamps

Tolbert, Leon M.

37

Replacing Fluorescent Lightbulbs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Replacing Fluorescent Lightbulbs Replacing Fluorescent Lightbulbs Replacing Fluorescent Lightbulbs July 29, 2012 - 6:37pm Addthis Although fluorescent lightbulbs are generally energy efficient, you can replace them with new, even more efficient bulbs that use better electrodes and coatings than older ones. | Photo courtesy of ©iStockphoto.com/JoLin. Although fluorescent lightbulbs are generally energy efficient, you can replace them with new, even more efficient bulbs that use better electrodes and coatings than older ones. | Photo courtesy of ©iStockphoto.com/JoLin. What does this mean for me? Today's fluorescent light fixtures and bulbs are far more efficient than older ones. You can replace fluorescent bulbs and ballasts with more efficient ones to save money and energy. All fluorescent bulbs contain a very small amount of mercury:

38

Biomass-Derived Hydrogen from a Thermally Ballasted Gasifier  

E-Print Network (OSTI)

Biomass-Derived Hydrogen from a Thermally Ballasted Gasifier DOE Hydrogen Program Contractors biomass #12;Approach Outline Gasifier Pilot Plant· Develop subsystems for the hydrogen production system and pyrolysis occur simultaneously in a single reactor · Exothermic combustion provides heat · Endothermic

39

Measurement of optical efficiency of fluorescent luminaires  

SciTech Connect

By controlling the lamp wall temperature of fluorescent lamps with a Peltier device, the optical efficiency of luminaires can be measured directly. Measurements of the fixture efficiency for a luminaire can vary by over 8% depending upon the lamp-ballast system used in the measurement. The authors suggest that optical efficiency may be an improved metric for evaluating fixture designs. 6 refs., 3 figs., 5 tabs.

Verderber, R.R.; Morse, O.; Rubinstein, F.; Siminovitch, M.

1987-01-01T23:59:59.000Z

40

Utility DSM Rebates for electronic ballasts: National estimates and market impact (1992 - 1997)  

E-Print Network (OSTI)

1 GENERAL DEVELOPMENTS IN DSM AND ENERGY EFFICIENCYFigure 1. Ballast Shipment and DSM Rebate Data . . . . .utility Demand-Side Management (DSM) rebates for electronic

Busch, C.B.; Atkinson, B.A.; Eto, J.H.; Turiel, I.; McMahon, J.E.

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Killing Effects of Hydroxyl Radical on Algae and Bacteria in Ship’s Ballast Water and on Their Cell Morphology  

Science Journals Connector (OSTI)

With the method of strong electric-field discharge, the treatments of ship’s ballast water [13, 14] and red tide in ocean [5...] using •OH radicals were performed in our laboratory. Based on the D-2 ballast water...

Mindong Bai; Zhitao Zhang; Xiaohong Xue…

2010-12-01T23:59:59.000Z

42

Bacteria in Ballast Water: The Shipping Industry's Contributions to the Transport and Distribution of Microbial Species in Texas  

E-Print Network (OSTI)

of the ballast tank bacterial community has not been examined. This study is the first to characterize the total bacterial community within a ballast tank by constructing a clone library from a ballast water sample from a cargo ship in the Port of Houston...

Neyland, Elizabeth B.

2010-10-12T23:59:59.000Z

43

The provenance of the stone ballast from the Molasses Reef Wreck  

E-Print Network (OSTI)

the ballast-mound strati graphy was recorded 13 Sorted ballast from section 13 of the LM cross section 15 Original hand-specimen sample form. 18 A simpiified hand-specimen sample form employed on the centerline cross section ba 1 I ast stones 18... reasonably well but the l2 Figure 2. View of the MRW ballast mound from the south end. (Photo courtesy of INA staff) 0 1 2 1" 1 I 0-aa 0- 1 ~ LM TRANSECT MN TRANSECT 04 TRANSECT MID 4 THAHSKCT Cf NTERLINK 1 - 1 33 KL TRANSECT NORTH \\3 3031...

Lamb, William Reginald

2012-06-07T23:59:59.000Z

44

PHASE I FINAL REPORT SUBCONTRACT NO. 2019702 "ENERGY EFFICIENT FLUORESCENT BALLASTS"  

E-Print Network (OSTI)

RELATIVE EFFICIENCY (FOOT CANDLES/POWER IN) LAMP TEMPERATUREEFFICIENCY (FOOT CANDLES/POWER IN) LAMP TEMPERATURE *INPUT CURRENT POWER INPUT POWER FACTOR LIGHT IN FOOT CANDLES

Authors, Various

2011-01-01T23:59:59.000Z

45

Ecosystem under pressure: Ballast water discharge into Galveston Bay, Texas (USA) from 2005 to 2010  

Science Journals Connector (OSTI)

Ballast water exchange processes facilitate the dispersal and unnatural geographic expansion of phytoplankton, including harmful algal bloom species. From 2005 to 2010, over 45,000 vessels (?8000 annually) travelled across Galveston Bay (Texas, USA) to the deep-water ports of Houston (10th largest in the world), Texas City and Galveston. These vessels (primarily tankers and bulkers) discharged ?1.2 × 108 metric tons of ballast water; equivalent to ?3.4% of the total volume of the Bay. Over half of the ballast water discharged had a coastwise origin, 96% being from US waters. Galveston Bay has fewer non-indigenous species but receives a higher volume of ballast water discharge, relative to the highly invaded Chesapeake and San Francisco Bays. Given the magnitude of shipping traffic, the role of Galveston Bay, both as a recipient and donor region of non-indigenous phytoplankton species is discussed here in terms of the invasibility risk to this system by way of ballast water.

Jamie L. Steichen; Rachel Windham; Robin Brinkmeyer; Antonietta Quigg

2012-01-01T23:59:59.000Z

46

Field Validated Discrete Element Model for Railroad Ballast Erol Tutumluer, Yu Qian, Youssef Y.M.A. Hashash, and Jamshid Ghaboussi  

E-Print Network (OSTI)

on a curve at the TTC FAST test track. During the ballast layer construction, settlement plates were also

Illinois at Urbana-Champaign, University of

47

Ballasts: Handling, Storage and Procedure: 8.40 Created: 07/01/2009  

E-Print Network (OSTI)

of industrial compounds produced by chlorination of biphenyl, noted primarily as an environmental pollutant applies to all Contractors, Project Managers, Facilities Operations and Environmental Health & Safety (EH-lamping activities and construction/renovation activities at Columbia University. Ballasts manufactured before 1978

Jia, Songtao

48

Energy-efficient compact screw-in fluorescent lamp. Final report  

SciTech Connect

A compact fluorescent lamp has been designed and constructed which can replace an incandescent lamp. The lamp is slightly larger than a standard lamp (8 3/4 in. x 3 1/4 in.), but is designed to fit a majority of portable lamp applications. This version, with a core-coil ballast, results in a system efficacy of 54 lumens per watt, with a light output of more than 1800 lumens. This compares favorably with a 100-watt incandescent (17.5 lumens per watt and 1750 lumens light output). The color temperature of 3000/sup 0/K is compatible with an incandescent lamp (2800/sup 0/K). The color rendition index (CRI) is 84. With a solid-state ballast, the efficacy and light output could be increased by 20% (65 l/w, 2200 lumens) and could provide a direct replacement for a three-way, 150-watt incandescent lamp (15 l/w, 2200 lumens).

Morton, E.W.

1982-11-01T23:59:59.000Z

49

Efficacy of open-ocean ballast water exchange as a means of preventing invertebrate invasions between freshwater ports  

E-Print Network (OSTI)

between freshwater ports Derek K. Gray Great Lakes Institute for Environmental Research, University Lakes to European ports. Each vessel had paired ballast tanks, one of which was designated as a control ports. BWE was verified by ship records and, in two cases, by in situ water quality sensors. BWE

50

Synthesis Of Fluorescent Metal Nanoclusters  

NLE Websites -- All DOE Office Websites (Extended Search)

Synthesis Of Fluorescent Metal Nanoclusters Synthesis Of Fluorescent Metal Nanoclusters Fluorescent metal nanoclusters were prepared. Available for thumbnail of Feynman Center...

51

EMSL - fluorescence spectrometer  

NLE Websites -- All DOE Office Websites (Extended Search)

fluorescence-spectrometer en Structures and Stabilities of (MgO)n Nanoclusters. http:www.emsl.pnl.govemslwebpublicationsstructures-and-stabilities-mgon-nanoclusters

52

Single-molecule Fluorescence Spectroelectrochemistry of Cresyl...  

NLE Websites -- All DOE Office Websites (Extended Search)

molecule Fluorescence Spectroelectrochemistry of Cresyl Violet. Single-molecule Fluorescence Spectroelectrochemistry of Cresyl Violet. Abstract: We coupled scanning fluorescence...

53

Fluorescent Tube Lamps  

Energy.gov (U.S. Department of Energy (DOE))

FEMP temporarily suspended its energy efficiency requirements for fluorescent tube lamps as it evaluates the market impact of the pending 2012 minimum efficiency standards for fluorescent lamps. The program will issue updated energy efficiency requirements when the market distribution of this product category stabilizes and when doing so has the potential to result in significant Federal energy savings.

54

Collecting Fluorescent Minerals  

Science Journals Connector (OSTI)

Good fluorescent mineral collections are the result of constant study and diligent search for superior material. As in the development of mineral collections generally, purchase and trade provide rewarding ave...

Manuel Robbins

1983-01-01T23:59:59.000Z

55

Fluorescent filtered electrophosphorescence  

DOE Patents (OSTI)

The present invention relates to organic light emitting devices (OLEDs), and more specifically to OLEDS that emit light using a combination of fluorescent emitters and phosphorescent emitters for the efficient utilization of all of the electrically generated excitons.

Forrest, Stephen (Ann Arbor, MI); Sun, Yiru (Princeton, NJ); Giebink, Noel (Ann Arbor, MI); Thompson, Mark E. (Anaheim Hills, CA)

2010-08-03T23:59:59.000Z

56

Fluorescent filtered electrophosphorescence  

DOE Patents (OSTI)

The present invention relates to organic light emitting devices (OLEDs), and more specifically to OLEDS that emit light using a combination of fluorescent emitters and phosphorescent emitters for the efficient utilization of all of the electrically generated excitons.

Forrest, Stephen R. (Princeton, NJ); Sun, Yiru (Princeton, NJ); Giebink, Noel (Princeton, NJ); Thompson, Mark E. (Anaheim Hills, CA)

2009-01-06T23:59:59.000Z

57

EA-1881: Final Environmental Assessment  

Energy.gov (U.S. Department of Energy (DOE))

Energy Conservation Program: Energy Conservation Standards for Fluorescent Lamp Ballasts (October 2011)

58

Optimized Magnetic Components Improve Efficiency of Compact Fluorescent Lamps  

E-Print Network (OSTI)

xtures (designed for incandescent bulbs) has allowed residential and small commercial electric customers of incandescent lamps and last 10 times longer [1]. High-frequency electronic ballasts are used to power CFLs

59

Renewable Surface Fluorescence Sandwich Immunoassay Biosensor...  

NLE Websites -- All DOE Office Websites (Extended Search)

Renewable Surface Fluorescence Sandwich Immunoassay Biosensor for Rapid Sensitive Botulinum Toxin Detection in an Automated Renewable Surface Fluorescence Sandwich Immunoassay...

60

Magnetic fluorescent lamp  

DOE Patents (OSTI)

The radiant emission of a mercury-argon discharge in a fluorescent lamp assembly is enhanced by providing means for establishing a magnetic field with lines of force along the path of electron flow through the bulb of the lamp assembly, to provide Zeeman splitting of the ultraviolet spectral line. Optimum results are obtained when the magnetic field strength causes a Zeeman splitting of approximately 1.7 times the thermal line width.

Berman, S.M.; Richardson R.W.

1983-12-29T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Fluorescent microthermographic imaging  

SciTech Connect

In the early days of microelectronics, design rules and feature sizes were large enough that sub-micron spatial resolution was not needed. Infrared or IR thermal techniques were available that calculated the object`s temperature from infrared emission. There is a fundamental spatial resolution limitation dependent on the wavelengths of light being used in the image formation process. As the integrated circuit feature sizes began to shrink toward the one micron level, the limitations imposed on IR thermal systems became more pronounced. Something else was needed to overcome this limitation. Liquid crystals have been used with great success, but they lack the temperature measurement capabilities of other techniques. The fluorescent microthermographic imaging technique (FMI) was developed to meet this need. This technique offers better than 0.01{degrees}C temperature resolution and is diffraction limited to 0.3 {mu}m spatial resolution. While the temperature resolution is comparable to that available on IR systems, the spatial resolution is much better. The FMI technique provides better spatial resolution by using a temperature dependent fluorescent film that emits light at 612 nm instead of the 1.5 {mu}m to 12 {mu}m range used by IR techniques. This tutorial starts with a review of blackbody radiation physics, the process by which all heated objects emit radiation to their surroundings, in order to understand the sources of information that are available to characterize an object`s surface temperature. The processes used in infrared thermal imaging are then detailed to point out the limitations of the technique but also to contrast it with the FMI process. The FMI technique is then described in detail, starting with the fluorescent film physics and ending with a series of examples of past applications of FMI.

Barton, D.L.

1993-09-01T23:59:59.000Z

62

Fluorescent temperature sensor  

DOE Patents (OSTI)

The present invention is a fluorescent temperature sensor or optical thermometer. The sensor includes a solution of 1,3-bis(1-pyrenyl)propane within a 1-butyl-1-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquid solvent. The 1,3-bis(1-pyrenyl)propane remains unassociated when in the ground state while in solution. When subjected to UV light, an excited state is produced that exists in equilibrium with an excimer. The position of the equilibrium between the two excited states is temperature dependent.

Baker, Gary A [Los Alamos, NM; Baker, Sheila N [Los Alamos, NM; McCleskey, T Mark [Los Alamos, NM

2009-03-03T23:59:59.000Z

63

Fluorescence analyzer for lignin  

DOE Patents (OSTI)

A method and apparatus for measuring lignin concentration in a sample of wood pulp or black liquor comprises a light emitting arrangement for emitting an excitation light through optical fiber bundles into a probe which has an undiluted sensing end facing the sample. The excitation light causes the lignin concentration to produce fluorescent emission light which is then conveyed through the probe to analyzing equipment which measures the intensity of the emission light. Measures a This invention was made with Government support under Contract Number DOE: DE-FC05-90CE40905 awarded by the Department of Energy (DOE). The Government has certain rights in this invention.

Berthold, John W. (Salem, OH); Malito, Michael L. (Hubbard, OH); Jeffers, Larry (Alliance, OH)

1993-01-01T23:59:59.000Z

64

Development of a fluorescent cryocooler  

SciTech Connect

Recent work at Los Alamos National Laboratory has demonstrated the physical principles for a new type of solid-state cryocooler based on anti-Stokes fluorescence. Design studies indicate that a vibration-free, low-mass ``fluorescent cryocooler`` could operate for years with efficiencies and cooling powers comparable to current commercial systems. This paper presents concepts for a fluorescent cryocooler, design considerations and expected performance.

Edwards, B.C.; Buchwald, M.I.; Epstein, R.I.; Gosnell, T.R.; Mungan, C.E.

1995-10-01T23:59:59.000Z

65

Theory of delayed thermal fluorescence  

Science Journals Connector (OSTI)

A theory of nonradiative thermal activation involved in delayed thermal fluorescence has been developed from the viewpoint of the breakdown of the Born-Oppenheimer adiabatic approximation.

S. H. Lin

1971-01-01T23:59:59.000Z

66

X-ray fluorescence mapping  

NLE Websites -- All DOE Office Websites (Extended Search)

biololgical cells, over the measurement of impurities in solar cells, to the rare earth content of geological materials. A somewhat 'typical' layout for a X-ray fluorescence...

67

SMB, X-ray Fluorescence Imaging  

NLE Websites -- All DOE Office Websites (Extended Search)

Fluorescence Imaging X-ray Fluorescence Imaging X-ray fluorescence imaging utilizes the high brightness of SPEAR3 and focused beam generated by the uses of K-B optics, capillaries...

68

Nuclear Resonance Fluorescence for Materials Assay  

E-Print Network (OSTI)

clandestine material with nuclear resonance fluorescence”.E. Norman, UC Berkeley Dept. of Nuclear Engineering, privatepp. 349. G. Warren et al. “Nuclear Resonance Fluorescence of

Quiter, Brian

2010-01-01T23:59:59.000Z

69

Fluorescence, Super Resolution STORM Microscope | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

fluorescence imaging of the intact cell with nanometer resolution. It incorporates single-molecule fluorescence techniques to reconstruct super-resolution images using...

70

DSM Electricity Savings Potential in the Buildings Sector in APP Countries  

E-Print Network (OSTI)

150 million compact fluorescent light bulbs in 2010. (ChinaCleaners Incandescent Bulbs Fluorescent Lamps Ballasts forincandescent bulbs with compact fluorescent lamps. Consumers

McNeil, MIchael

2011-01-01T23:59:59.000Z

71

Single Nanoparticle Surface Enhanced Fluorescence  

Science Journals Connector (OSTI)

It is well established that when in close proximity to gold nanoparticles the optical properties of local fluorescent molecules are dramatically altered. When the localised surface plasmon resonance (LSPR), tuned...

Linden R. Webster; K. Suhling; D. Richards

2013-01-01T23:59:59.000Z

72

Nuclear Resonance Fluorescence for Nuclear Materials Assay  

E-Print Network (OSTI)

Potential of Nuclear Resonance Fluorescence . . . . . . . .2.9.1 Nuclear ThomsonSections . . . . . . . . . . . . . . . Nuclear Resonance

Quiter, Brian Joseph

2010-01-01T23:59:59.000Z

73

GREEN FLUORESCENT PROTEIN The green revolution  

E-Print Network (OSTI)

GREEN FLUORESCENT PROTEIN The green revolution Green fluorescent protein allows gene expression a fluorescent product when expressed. Just such a molecule, green fluorescent protein (GFP), has recently green light when disturbed (often seen when riding in a boat at night). In Aequorea, the green

Stearns, Tim

74

Catalog of DC Appliances and Power Systems  

E-Print Network (OSTI)

bulb or tube, a compact fluorescent lamp typically includes an integral ballast, as do HID lamps, and an LED

Garbesi, Karina

2012-01-01T23:59:59.000Z

75

Covered Product Category: Fluorescent Luminaires  

Energy.gov (U.S. Department of Energy (DOE))

FEMP provides acquisition guidance and Federal efficiency requirements across a variety of product categories, including fluorescent luminaires. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

76

Single molecule fluorescence (the basics)  

E-Print Network (OSTI)

Single molecule fluorescence (the basics) #12;light time light time No averaging, no need;knrkr S0 S1 Iph . . Iexc #12;Single molecule emitters #12;K. Brejc et.al., PNAS 94 (1997) 2306 1 nm glass, notch holographic, multidielectric,... #12;Optical schemes to detect single molecules Excitation

Ritort, Felix

77

Statistics of Molecular Ensemble Blinking Fluorescence  

Science Journals Connector (OSTI)

Statistics of Molecular Ensemble Blinking Fluorescence ... Theoretical expressions suitable for statistical analysis of fluorescence of M molecules are derived. ... Therefore the probability of finding two photons at the same time equals zero. ...

I. S. Osad’ko; A. L. Shchukina

2010-05-19T23:59:59.000Z

78

Capacitive sensing with a fluorescent lamp  

E-Print Network (OSTI)

This work presents a modified fluorescent lamp that can be used as a capacitive sensing system. The lamp sensor measures changes in the electric fields emitted from the fluorescent bulbs in order to deduce the presence and ...

Cooley, John Jacob

2007-01-01T23:59:59.000Z

79

Clay Nanoparticle-Supported Single-Molecule FluorescenceSpectroelectr...  

NLE Websites -- All DOE Office Websites (Extended Search)

Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry. Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry. Abstract: We...

80

Chromosome characterization using single fluorescent dye  

DOE Patents (OSTI)

Chromosomes are characterized by fluorescent emissions from a single fluorescent dye that is excited over two different wavelengths. A mixture containing chromosomes is stained with a single dye selected from the group consisting of TOTO and YOYO and the stained chromosomes are placed in a flow cytometer. The fluorescent dye is excited sequentially by a first light having a wavelength in the ultraviolet range to excite the TOTO or YOYO to fluoresce at a first intensity and by a second light having a wavelength effective to excite the TOTO or YOYO dye to fluoresce at a second intensity. Specific chromosomes may be identified and sorted by intensity relationships between the first and second fluorescence emissions.

Crissman, Harry A. (Los Alamos, NM); Hirons, Gregory T. (Irvine, CA)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Max Tech and Beyond: Fluorescent Lamps  

E-Print Network (OSTI)

varies by watts of power per foot of electrical arc in theFoot Linear Fluorescent Lamps Efficacy Life Lumens Type Base Power

Scholand, Michael

2012-01-01T23:59:59.000Z

82

Covered Product Category: Compact Fluorescent Lamps  

Energy.gov (U.S. Department of Energy (DOE))

FEMP provides acquisition guidance across a variety of product categories, including compact fluorescent lamps (CFLs), which are an ENERGY STAR-qualified product category.

83

Exciplex Fluorescence Thermometry of Liquid Fuel  

Science Journals Connector (OSTI)

An experimental program is described that investigates the application of exciplex fluorescence to the internal thermometry of flowing liquid decane in the temperature range 24-91°C....

Stufflebeam, John H

1989-01-01T23:59:59.000Z

84

Energy saving controller for fluorescent lamps.  

E-Print Network (OSTI)

??Although fluorescent lamp is a very efficient lighting device in daily life, still the high harmonic distortion and low power factor cause unnecessary energy consumption.… (more)

Cheong, Zhi Xiong

2010-01-01T23:59:59.000Z

85

LED Replacements for Linear Fluorescent Lamps Webcast  

Energy.gov (U.S. Department of Energy (DOE))

In this June 20, 2011 webcast on LED products marketed as replacements for linear fluorescent lamps, Jason Tuenge of the Pacific Northwest National Laboratory (PNNL) discussed current Lighting...

86

Max Tech and Beyond: Fluorescent Lamps  

E-Print Network (OSTI)

Fluorescent Lamps and Incandescent Reflector Lamps; Finalmany end- use applications. Incandescent Outdoor Stationaryof color compared with the incandescent reference source is

Scholand, Michael

2012-01-01T23:59:59.000Z

87

Fluorescence, Single-Molecule Microscope | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

Single-Molecule Microscope Fluorescence, Single-Molecule Microscope The single-molecule optical microscope is designed to study complex reaction dynamics such as enzymatic...

88

Single-Molecule Fluorescence Analysis in Solution  

Science Journals Connector (OSTI)

Over the past five years, several groups have developed the capability to detect and identify single fluorescent molecules in solution as the molecules flow through a focused laser...

Keller, Richard A; Ambrose, W Patrick; Goodwin, Peter M; Jett, James H; Martin, John C; Wu, Ming

1996-01-01T23:59:59.000Z

89

Fluorescence lidar monitoring of historic buildings  

Science Journals Connector (OSTI)

Laser-induced fluorescence spectra detected with high-spectral-resolution lidar on the facades of the Baptistery and the Cathedral in Parma are presented and discussed. The...

Raimondi, Valentina; Cecchi, Giovanna; Pantani, Luca; Chiari, Roberto

1998-01-01T23:59:59.000Z

90

Guide to Red Fluorescent Proteins and Biosensors for Flow Cytometry  

E-Print Network (OSTI)

CHAPTER 17 Guide to Red Fluorescent Proteins and Biosensors for Flow Cytometry Kiryl D. PiatkevichH Stability of Fluorescence F. Optimization of Nucleotide and Amino Acid Sequences III. Modern Advanced Red-Shifted FPs A. Orange Fluorescent Proteins B. Red Fluorescent Proteins C. Far-Red Fluorescent Proteins IV

Verkhusha, Vladislav V.

91

PEVELOPMENT OF FLUORESCENCE LIFETIME DIAGNOSTIC  

Office of Scientific and Technical Information (OSTI)

4 4 PEVELOPMENT OF FLUORESCENCE LIFETIME DIAGNOSTIC w I Project Accomplishments Summary (Attachment I) CRADA NO. TSB-1449-97 Date: U 1 8 1 9 8 Revision: 1 A . Parties The project is a relationship between the Lawrence Livennore National Laboratoq (LLNL) and Optiphase, Inc. University of California Lawrence Livermore National Laboratory 7000 East Avenue, L-399 Livermore, CA 94550 Optiphase, h c 7652 Haskell Ave. Van Nuys, CA 91406 Technical Contact - D r . Pepe Davis (8 18)782-0997ext 1 12 B . Background Fiber-optic-based sensors are excellent candidates for detecting the presence and monitoring the levels of degradation products in stockpiled weapons. Specifically, fl uorescence-based sensors are extremely sensitive, can have high specificity for compounds of interest, and are "e~ectrically

92

Fiber optical assembly for fluorescence spectrometry  

DOE Patents (OSTI)

A system for analyzing a sample for the presence of an analyte in a sample. The system includes a sample holder for containing the sample; an excitation source, such as a laser, and at least one linear array radially disposed about the sample holder. Radiation from the excitation source is directed to the sample, and the radiation induces fluorescent light in the sample. Each linear array includes a plurality of fused silica optical fibers that receive the fluorescent light and transmits a fluorescent light signal from the first end to an optical end port of the linear array. An end port assembly having a photo-detector is optically coupled to the optical end port. The photo-detector detects the fluorescent light signal and converts the fluorescent light signal into an electrical signal.

Carpenter, II, Robert W. (Pagosa Springs, CO); Rubenstein, Richard (Staten Island, NY); Piltch, Martin (Los Alamos, NM); Gray, Perry (Los Alamos, NM)

2010-12-07T23:59:59.000Z

93

Using Superfolder Green Fluorescent Protein for Periplasmic Protein Localization Studies  

Science Journals Connector (OSTI)

...Microbial Cell Biology Using Superfolder Green Fluorescent Protein for Periplasmic Protein...hampered by problems with the export of green fluorescent protein (GFP). Here we show...problems with the export of functional green fluorescent protein (GFP) (9). When...

Thuy Dinh; Thomas G. Bernhardt

2011-07-15T23:59:59.000Z

94

Near-Infrared Fluorescent 9-Phenylethynylpyronin Analogues for Bioimaging  

Science Journals Connector (OSTI)

The syntheses and biological applications of two novel fluorescent 9-phenylethynylpyronin analogues containing either carbon or silicon at the position 10 are reported. Both fluorescent probes exhibited a relatively strong fluorescence in methanol and ...

Tomáš Pastierik; Peter Šebej; Ji?ina Medalová; Peter Štacko; Petr Klán

2014-03-31T23:59:59.000Z

95

Building Technologies Office: Fluorescent and Incandescent Lamps Public  

NLE Websites -- All DOE Office Websites (Extended Search)

Fluorescent and Fluorescent and Incandescent Lamps Public Meeting to someone by E-mail Share Building Technologies Office: Fluorescent and Incandescent Lamps Public Meeting on Facebook Tweet about Building Technologies Office: Fluorescent and Incandescent Lamps Public Meeting on Twitter Bookmark Building Technologies Office: Fluorescent and Incandescent Lamps Public Meeting on Google Bookmark Building Technologies Office: Fluorescent and Incandescent Lamps Public Meeting on Delicious Rank Building Technologies Office: Fluorescent and Incandescent Lamps Public Meeting on Digg Find More places to share Building Technologies Office: Fluorescent and Incandescent Lamps Public Meeting on AddThis.com... About Standards & Test Procedures Implementation, Certification & Enforcement

96

Fluorescent Silica Nanoparticles with Efficient Urinary Excretion for Nanomedicine  

Science Journals Connector (OSTI)

Fluorescent Silica Nanoparticles with Efficient Urinary Excretion for Nanomedicine ... The emerging nanomedicine landscape ... Core-shell silica nanoparticles as fluorescent labels for nanomedicine ...

Andrew A. Burns; Jelena Vider; Hooisweng Ow; Erik Herz; Oula Penate-Medina; Martin Baumgart; Steven M. Larson; Ulrich Wiesner; Michelle Bradbury

2008-12-19T23:59:59.000Z

97

Excitation-emission spectra and fluorescence quantum yields for...  

NLE Websites -- All DOE Office Websites (Extended Search)

Excitation-emission spectra and fluorescence quantum yields for fresh and aged biogenic secondary organic aerosols. Excitation-emission spectra and fluorescence quantum yields for...

98

Single molecule fluorescence in rectangular nano-apertures  

Science Journals Connector (OSTI)

Fluorescence Correlation Spectroscopy is used to investigate fluorescent molecules in solution diffusing in subwavelength rectangular apertures milled in Aluminium films. This...

Wenger, Jérôme; Lenne, Pierre-François; Popov, Evgueni; Rigneault, Hervé; Dintinger, José; Ebbesen, Thomas

2005-01-01T23:59:59.000Z

99

Fluorescent Minerals of the United States  

Science Journals Connector (OSTI)

Possibly the most interesting and consistently fluorescing sphalerites are found at Franklin, New Jersey, and the Sterling mine at Ogdensburg, New Jersey. These sphalerites occur as resinous blebs or masses, c...

Manuel Robbins

1983-01-01T23:59:59.000Z

100

Epi-Fluorescence Inverted Microscope (Zeiss,  

E-Print Network (OSTI)

Epi-Fluorescence Inverted Microscope (Zeiss, Observer Z1) April 2013 #12;Start Up cont. · Turn) #12;Using the Microscope cont. · On an inverted microscope samples on a glass slide are usually viewed

Subramanian, Venkat

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Intrinsic Fluorescence of Intrinsically Disordered Proteins  

Science Journals Connector (OSTI)

Resolution of the intrinsic emission properties of a protein by different fluorescence spectroscopy techniques is an ... on rotational movements of peptide chains or whole proteins. Here, we describe the details ...

Paolo Neyroz; Stefano Ciurli

2012-01-01T23:59:59.000Z

102

Multiplexed fluorescence detector system for capillary electrophoresis  

DOE Patents (OSTI)

A fluorescence detection system for capillary electrophoresis is provided wherein the detection system can simultaneously excite fluorescence and substantially simultaneously monitor separations in multiple capillaries. This multiplexing approach involves laser irradiation of a sample in a plurality of capillaries through optical fibers that are coupled individually with the capillaries. The array is imaged orthogonally through a microscope onto a charge-coupled device camera for signal analysis. 14 figures.

Yeung, E.S.; Taylor, J.A.

1994-06-28T23:59:59.000Z

103

Multiplexed fluorescence detector system for capillary electrophoresis  

DOE Patents (OSTI)

A fluorescence detection system for capillary electrophoresis is provided wherein the detection system can simultaneously excite fluorescence and substantially simultaneously monitor separations in multiple capillaries. This multiplexing approach involves laser irradiation of a sample in a plurality of capillaries through optical fibers that are coupled individually with the capillaries. The array is imaged orthogonally through a microscope onto a charge-coupled device camera for signal analysis. 14 figs.

Yeung, E.S.; Taylor, J.A.

1996-03-12T23:59:59.000Z

104

High Hats, Swiss Cheese, and Fluorescent Lighting?  

SciTech Connect

For DOE, PNNL is conducting a competitive procurement to promote market introduction of new residential recessed downlights (also known as ''recessed cans'' or ''high hats'') that are airtight, rated for insulated ceilings, and hard-wired for CFLs. This paper discusses the potential energy savings of new high-efficiency downlights, and the results of product testing to date. Recessed downlights are the most popular residential lighting fixtures in the United States, with 21.7 million fixtures sold in 2000. An estimated 350 million are currently installed in American homes. Recessed cans are relatively inexpensive, and provide an unobtrusive, directed source of light for kitchens, hallways, and living rooms. Recessed cans are energy-intensive in three ways. First, virtually all recessed cans currently installed in the residential sector use incandescent light sources, typically reflector-type lamps drawing 65-150 watts. Second, heat from incandescent lamps adds to air-conditioning loads. Third, most installed recessed cans are not airtight, so they allow conditioned air to escape from the living area into unconditioned spaces such as attics. Addressing both lighting energy use and air leakage in recessed cans has proven challenging. Lighting energy efficiency is greatly improved by using CFLs. Air leakage can be addressed by making fixtures airtight. But when CFLs are used in an airtight recessed can, heat generated by the lamp and ballast is trapped within the fixture. Excessive heat causes reduced light output and shorter lifespan of the CFL. The procurement was designed to overcome these technical challenges and make new products available in the marketplace.

McCullough, Jeffrey J.; Gordon, Kelly L.

2002-08-30T23:59:59.000Z

105

Ultratrace analysis of transuranic actinides by laser-induced fluorescence  

DOE Patents (OSTI)

Ultratrace quantities of transuranic actinides are detected indirectly by their effect on the fluorescent emissions of a preselected fluorescent species. Transuranic actinides in a sample are coprecipitated with a host lattice material containing at least one preselected fluorescent species. The actinide either quenches or enhances the laser-induced fluorescence of the preselected fluorescent species. The degree of enhancement or quenching is quantitatively related to the concentration of actinide in the sample.

Miller, S.M.

1983-10-31T23:59:59.000Z

106

EA-1881: Energy Conservation Program: Energy Conservation Standards for  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

81: Energy Conservation Program: Energy Conservation Standards 81: Energy Conservation Program: Energy Conservation Standards for Fluorescent Lamp Ballasts EA-1881: Energy Conservation Program: Energy Conservation Standards for Fluorescent Lamp Ballasts Summary This EA evaluates the environmental impacts of a proposal to amend energy conservation standards for various consumer products and certain commercial and industrial equipment, including fluorescent lamp ballasts. Public Comment Opportunities No public comment opportunities available at this time. Documents Available for Download October 20, 2011 EA-1881: Finding of No Significant Impact Energy Conservation Program: Energy Conservation Standards for Fluorescent Lamp Ballasts (October 2011) October 5, 2011 EA-1881: Final Environmental Assessment Energy Conservation Program: Energy Conservation Standards for Fluorescent

107

Thermally efficient compact fluorescent fixture systems  

SciTech Connect

Compact fluorescent lamps that can be inserted into conventional light fixtures are rapidly gaining acceptance as both a viable retrofit and new design approach to reducing lighting loads. Ideally, the compact fluorescent lamp should have the same light output as the incandescent lamp it replaces, but overheating inside typically small enclosed fixtures can reduce lumen output and hence lighting fixture efficiency by 15 to 20 percent. Fortunately, simple fixture modifications can erase this efficiency penalty, so that the full efficiency benefit of replacing incandescent lamps with fluorescent lamps can be realized. The paper describes such modifications and presents experimental data documenting the potential efficiency enhancement associated with thermal control systems. 4 refs., 7 figs.

Siminovitch, M.J.; Rubinstein, F.M.; Packer, M.

1991-04-01T23:59:59.000Z

108

Ultrabright fluorescent OLEDS using triplet sinks  

DOE Patents (OSTI)

A first device is provided. The first device further comprises an organic light emitting device. The organic light emitting device further comprises an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further comprises an organic host compound, an organic emitting compound capable of fluorescent emission at room temperature, and an organic dopant compound. The triplet energy of the dopant compound is lower than the triplet energy of the host compound. The dopant compound does not strongly absorb the fluorescent emission of the emitting compound.

Zhang, Yifan; Forrest, Stephen R; Thompson, Mark

2013-06-04T23:59:59.000Z

109

Covered Product Category: Suspended Fluorescent Luminaires  

Energy.gov (U.S. Department of Energy (DOE))

The Federal Energy Management Program (FEMP) provides acquisition guidance and Federal efficiency requirements for Suspended Fluorescent Luminaires. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

110

On simulating 3D fluorescent microscope images  

Science Journals Connector (OSTI)

In recent years many various biomedical image segmentation methods have appeared. Though typically presented to be successful the majority of them was not properly tested against ground truth images. The obvious way of testing the quality of new segmentation ... Keywords: convolution, fluorescent optical microscope, procedural texture, simulator, synthetic image

David Svoboda; Marek Kašík; Martin Maška; Jan Hubeny; Stanislav Stejskal; Michal Zimmermann

2007-08-01T23:59:59.000Z

111

New and Underutilized Technology: Efficient High Bay Fluorescent Lighting |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Efficient High Bay Fluorescent Efficient High Bay Fluorescent Lighting New and Underutilized Technology: Efficient High Bay Fluorescent Lighting October 7, 2013 - 8:54am Addthis The following information outlines key deployment considerations for efficient high bay fluorescent lighting within the Federal sector. Benefits Efficient high bay fluorescent lighting can include either T5 or T8 fluorescent lighting systems for high-bay applications currently using metal halide fixtures. Fluorescent fixtures offer better light distribution, better light maintenance over the life of the lamp, improved color quality, and on-off control (re-strike time) with lower energy consumption. Application Efficient high bay fluorescent lighting is applicable for facilities containing high bay areas. Key Factors for Deployment

112

CODED SPECTROSCOPY FOR ETHANOL DETECTION IN DIFFUSE, FLUORESCENT MEDIA  

E-Print Network (OSTI)

ABSTRACT CODED SPECTROSCOPY FOR ETHANOL DETECTION IN DIFFUSE, FLUORESCENT MEDIA by Scott Thomas Mc FOR ETHANOL DETECTION IN DIFFUSE, FLUORESCENT MEDIA by Scott Thomas McCain Department of Electrical

113

Fluorescence resonance energy transfer scanning near-field optical microscopy  

Science Journals Connector (OSTI)

...and applications. New York: Wiley Interscience...Fluorescence resonance energy transfer SNOM 919...fluorescence resonance energy transfer source...Electromagnetic theory. New York: McGraw-Hill...hierarchy and directed energy transfer in conjugated...

2004-01-01T23:59:59.000Z

114

Text-Alternative Version: LED Replacements for Linear Fluorescent Lamps  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the "LED Replacements for Linear Fluorescent Lamps" webcast, held June 20, 2011.

115

A photoactivatable green-fluorescent protein from the phylum Ctenophora  

Science Journals Connector (OSTI)

...Diversity and evolution of the green fluorescent protein family...determined by a nonfluorescent green fluorescent protein homolog...rhodamine 6G and fluorescein in nine solvents: improved absolute standards...structure of the Aequorea victoria green fluorescent protein. Gene 111...

2010-01-01T23:59:59.000Z

116

Red fluorescent proteins: chromophore formation and cellular applications  

E-Print Network (OSTI)

Red fluorescent proteins: chromophore formation and cellular applications Atsushi Miyawaki1,2 , Daria M Shcherbakova3,4 and Vladislav V Verkhusha3,4 In the last decade, a number of red fluorescent proteins (RFPs) that emit orange, red, and far-red fluorescence have been isolated from anthozoans (corals

Verkhusha, Vladislav V.

117

LIGHT-INDUCED CHANGES IN THE FLUORESCENCE YIELD OF  

E-Print Network (OSTI)

OF PREILLUMINATION ON THE FLUORESCENCE TRANSIENT OF Chlorella pyrenoidosa JOHN C. MUNDAY, JR., and GOVINDJEE From Mexico 88330. ABSTRACT The fluorescence transient of Chlorella pyrenoidosa, excited by saturat- ing blue Chlorella pyrenoidosa the fluorescence transient exhibits a base level 0, a hump I at 50 msec. (at 1.5 X 104

Govindjee

118

LIGHT-INDUCED CHANGES IN THE FLUORESCENCE YIELD OF  

E-Print Network (OSTI)

LIGHT-INDUCED CHANGES IN THE FLUORESCENCE YIELD OF CHLOROPHYLL a IN VIVO II. CHLORELLA PYRENOIDOSA in Chlorella pyrenoidosa consists of a fast rise of the fluorescence yield from the level S (of the first wave photophosphorylation. INTRODUCTION The long-term fluorescence induction in Chlorella pyrenoidosa (second wave

Govindjee

119

Brief Communication 809 Photoactivation turns green fluorescent protein red  

E-Print Network (OSTI)

Brief Communication 809 Photoactivation turns green fluorescent protein red Michael B. Elowitz gene was first cloned, the Aequorea victoria green fluorescent protein (GFP) has become a powerful tool- wavelength (red) fluorescence has remained elusive. Here we describe a red-emitting, green

Elowitz, Michael

120

Upping fluorescence Paving the way for single-molecule medical  

E-Print Network (OSTI)

Upping fluorescence ­ Paving the way for single-molecule medical sensors The presence to the information content of single molecule fluorescence measurement[2]. Ideally, a single fluorophore should last in the collection of data at the single-molecule level where oxygen efficiently reduces the fluorescence lifetime

Strathclyde, University of

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Single-molecule Fluorescence Spectroelectrochemistry of Cresyl Violet  

SciTech Connect

We coupled scanning fluorescence microscopy with a potentiostat via a three-electrode electrochemical cell to enable single-molecule fluorescence spectroelectrochemistry of cresyl violet in aqueous solution, where the single-molecule fluorescence intensity of cresyl violet is modulated synchronously with the cyclic voltammetric potential scanning.

Lei, Chenghong; Hu, Dehong; Ackerman, Eric J.

2008-11-21T23:59:59.000Z

122

Limitations of the Reporter Green Fluorescent Protein under Simulated Tumor Conditions  

Science Journals Connector (OSTI)

...visualized live and in process by green fluorescence protein expression...Tsien R. Y. Engineering green fluorescent protein for improved...wavelengths and fluorescence resonance energy transfer. Curr. Biol., 6...Generation of destabilized green fluorescent protein as a transcription...

Claudia Coralli; Maja Cemazar; Chryso Kanthou; Gillian M. Tozer; and Gabi U. Dachs

2001-06-15T23:59:59.000Z

123

Room Air Conditioners | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Test Results roomairconditioner v1.6.xlsx More Documents & Publications Commercial Air Conditioners and Heat Pumps Fluorescent Lamp Ballasts Residential Condensing Gas Furnaces...

124

Illuminated Exit Signs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

federal energy conservation standards. illuminatedexitsignsv1.1.xlsx More Documents & Publications Beverage Vending Machines Residential Clothes Dryers Fluorescent Lamp Ballasts...

125

External Power Supplies | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

federal energy conservation standards. externalpowersuppliesv1.1.xlsx More Documents & Publications Illuminated Exit Signs Fluorescent Lamp Ballasts Beverage Vending Machines...

126

DOE February 2012 ECS Report to Congress  

Office of Environmental Management (EM)

and refrigerator-freezers, fluorescent lamp ballasts, and direct heating equipment, and test procedures for walk-in coolers and walk-in freezers, automatic commercial ice makers,...

127

Energy and Economic Impacts of U.S. Federal Energy and Water Conservation Standards Adopted From 1987 Through 2010  

E-Print Network (OSTI)

Fluorescent Lamps and Incandescent Reflector Lamps MediumBallasts and Fixtures General Service Incandescent Lamps,Intermediate Base Incandescent Lamps and Candelabra Base

Meyers, Stephen

2013-01-01T23:59:59.000Z

128

Analysis of Potential Energy Saving and CO2 Emission Reduction of Home Appliances and Commercial Equipments in China  

E-Print Network (OSTI)

irons Automatic rice cookers Microwave Radio receivers andFluorescent Lamp Ballast Rice cooker Microwave ovens OfficeOthers include: rice cookers, microwaves, laser printers,

Zhou, Nan

2010-01-01T23:59:59.000Z

129

NEXT GENERATION ENERGY EFFICIENT FLUORESCENT LIGHTING PRODUCT  

SciTech Connect

This is the Final Report of the Next-Generation Energy Efficient Fluorescent Lighting Products program, Department of Energy (DOE). The overall goal of this three-year program was to develop novel phosphors to improve the color rendition and efficiency of compact and linear fluorescent lamps. The prime technical approach was the development of quantum-splitting phosphor (QSP) to further increase the efficiency of conventional linear fluorescent lamps and the development of new high color rendering phosphor blends for compact fluorescent lamps (CFLs) as potential replacements for the energy-hungry and short-lived incandescent lamps in market segments that demand high color rendering light sources. We determined early in the project that the previously developed oxide QSP, SrAl{sub 12}O{sub 19}:Pr{sup 3+}, did not exhibit an quantum efficiency higher than unity under excitation by 185 nm radiation, and we therefore worked to determine the physical reasons for this observation. From our investigations we concluded that the achievement of quantum efficiency exceeding unity in SrAl{sub 12}O{sub 19}:Pr{sup 3+} was not possible due to interaction of the Pr{sup 3+} 5d level with the conduction band of the solid. The interaction which gives rise to an additional nonradiative decay path for the excitation energy is responsible for the low quantum efficiency of the phosphor. Our work has led to the development of a novel spectroscopic method for determining photoionzation threshold of luminescent centers in solids. This has resulted in further quantification of the requirements for host phosphor lattice materials to optimize quantum efficiency. Because of the low quantum efficiency of the QSP, we were unable to demonstrate a linear fluorescent lamp with overall performance exceeding that of existing mercury-based fluorescent lamps. Our work on the high color rendering CFLs has been very successful. We have demonstrated CFLs that satisfies the EnergyStar requirement with color rendering index (CRI) greater than 90; the CRI of current commercial CFLs are in the low 80s. In this report we summarize the technical work completed under the Program, summarize our findings about the performance limits of the various technologies we investigated, and outline promising paths for future work.

Alok Srivastava; Anant Setlur

2003-04-01T23:59:59.000Z

130

Product Standards for Fluorescent Lighting (Japan) | Open Energy  

Open Energy Info (EERE)

Product Standards for Fluorescent Lighting (Japan) Product Standards for Fluorescent Lighting (Japan) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Product Standards for Fluorescent Lighting (Japan) Focus Area: Appliances & Equipment Topics: Policy Impacts Website: www.eccj.or.jp/top_runner/pdf/tr_fluorescent_lights_jul.2009.pdf Equivalent URI: cleanenergysolutions.org/content/product-standards-fluorescent-lightin Language: English Policies: "Deployment Programs,Regulations" is not in the list of possible values (Deployment Programs, Financial Incentives, Regulations) for this property. DeploymentPrograms: Industry Codes & Standards Regulations: Appliance & Equipment Standards and Required Labeling This Energy Conservation Center Japan (ECCJ) document was created as a

131

The Colorful Journey of Green Fluorescent Protein  

Science Journals Connector (OSTI)

Though the story of GFP began millions of years ago when the jellyfish Aequorea aequorea (also commonly referred to as Aequorea victoria and Aequorea forskalea) successfully evolved a fluorescent protein species with the uncanny ability to convert the excited blue energy of the bioluminescent protein aequorin into the green light observed in nature, its journey to “Nature’s Scientific Contributors Hall of Fame” started much more recently, in 1961. ... This observation, which represents the initial discovery of GFP, was included as a footnote in a paper by Shimomura and Johnson (1) describing the purification and characterization of aequorin: “A protein giving solutions that look slightly greenish in sunlight though only yellowish under tungsten lights, and exhibiting a very bright, greenish fluorescence in the ultraviolet of a Mineralite, has also been isolated from the squeezates.” ... In fact, during my time there, he still tried to find time to carry out chemical syntheses, which usually happened during Christmas. ...

Jin Zhang

2009-02-20T23:59:59.000Z

132

Invisible-fluorescent identification tags for materials  

DOE Patents (OSTI)

A taggant composition including a taggant material that is invisible in light of the visible spectrum and fluoresces under a non-visible excitation energy, a binder, and a solvent in which the taggant material and the binder are dissolved. The taggant composition can be printed or otherwise applied to a material such as fabric to provide a detectable and identifiable indicium. A method and apparatus for detecting and decoding the taggant indicium are also provided.

Lewis, Linda A.; Allgood, Glenn O.; Smithwick, III, Robert W.

2013-03-26T23:59:59.000Z

133

Nuclear Resonance Fluorescence of 237 Np  

SciTech Connect

Identification and characterization of fissile material is of international concern because of the possibility of proliferation. For safeguards applications, techniques providing isotopic information are necessary [1]. However, few techniques can distinguish between fissile isotopes. Nuclear resonance fluorescence is one technique that can be used in applications to identify and quantify isotopic content. NRF has also been proposed in several detector systems as a viable way to identify fissile material in cargo containers [2, 3]. It is necessary to measure the characteristic resonances of each isotope that is to be distinguished in identification and assay applications.

Angell, Chris T.; Yee, R.; Joshi, T.; Swanberg, E.; Norman, E. B.; Hicks, C. L.; Klimenko, A.; Korbly, Steve; Wilson, C.; Kulp, W. D.; Warren, Glen A.; Bray, T. H.; Copping, R.; Glans, P.A.; Tyliszczak, T.; Shuh, David K.

2010-11-15T23:59:59.000Z

134

Compact fluorescent lamp applications in luxury hotels  

SciTech Connect

Over the past several years, consumers, lighting designers, and energy conservationists have paid increasing attention to the special characteristics of compact fluorescent lamps (CFLs). CFLs can typically be used to replace incandescent lamps of three to four times their own wattage, and their color rendering indices (CRIs)-80 to 85-make them virtually indistinguishable from incandescents. The typical 10,0000-hour life of a CFL often makes savings in labor its most desirable feature when compared to a shorter-lived incandescent lamp.

Gilleskie, R.J.

1996-01-01T23:59:59.000Z

135

Solid state laser media driven by remote nuclear powered fluorescence  

DOE Patents (OSTI)

An apparatus is provided for driving a solid state laser by a nuclear powered fluorescence source which is located remote from the fluorescence source. A nuclear reaction produced in a reaction chamber generates fluorescence or photons. The photons are collected from the chamber into a waveguide, such as a fiber optic waveguide. The waveguide transports the photons to the remote laser for exciting the laser.

Prelas, Mark A. (Columbia, MO)

1992-01-01T23:59:59.000Z

136

Energy Dependence of Air Fluorescence Yield measured by AIRFLY  

E-Print Network (OSTI)

In the fluorescence detection of ultra high energy (> 10**18 eV) cosmic rays, the number of emitted fluorescence photons is assumed to be proportional to the energy deposited in air by shower particles. We have performed measurements of the fluorescence yield in atmospheric gases excited by electrons over energies ranging from keV to hundreds of MeV in several accelerators. We found that within the measured energy ranges the proportionality holds at the level of few %.

M. Ave

2007-11-28T23:59:59.000Z

137

Using fluorescence lifetime for discriminating detector afterpulsing in fluorescence-correlation spectroscopy  

E-Print Network (OSTI)

ACF , i.e., the second- order correlation function of the fluorescence intensity sig- nal. The physical meaning of the ACF is that it is propor- tional to the probability to detect, on average, a photon- nique, although the analysis does not explicitly identify single molecule detection events. On different

Enderlein, Jörg

138

Fluorescence methods for determination of temperature in fuel sprays  

Science Journals Connector (OSTI)

Fluorescent additives which allow the determination of droplet temperatures in hydrocarbon fuel sprays have been developed. These systems, which exploit the chemistry of organic...

Murray, A M; Melton, L A

1985-01-01T23:59:59.000Z

139

Site-Specific Synthesis and In Situ Immobilization of Fluorescent...  

NLE Websites -- All DOE Office Websites (Extended Search)

Site-Specific Synthesis and In Situ Immobilization of Fluorescent Silver Nanoclusters on DNA Nanoscaffolds by Use of the Tollens Reaction Authors: Pal, S., Varghese, R., Deng, Z.,...

140

Time-resolved fluorescence decay measurements for flowing particles  

DOE Patents (OSTI)

Time-resolved fluorescence decay measurements for flowing particles. An apparatus and method for the measurement and analysis of fluorescence for individual cells and particles in flow are described, wherein the rapid measurement capabilities of flow cytometry and the robust measurement and analysis procedures of time-domain fluorescence lifetime spectroscopy are combined. A pulse-modulated cw laser is employed for excitation of the particles. The characteristics and the repetition rate of the excitation pulses can be readily adjusted to accommodate for fluorescence decays having a wide range of lifetimes.

Deka, Chiranjit (Miami, FL); Steinkamp, John A. (Los Alamos, NM)

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Time-resolved fluorescence decay measurements for flowing particles  

DOE Patents (OSTI)

Time-resolved fluorescence decay measurements are disclosed for flowing particles. An apparatus and method for the measurement and analysis of fluorescence for individual cells and particles in flow are described, wherein the rapid measurement capabilities of flow cytometry and the robust measurement and analysis procedures of time-domain fluorescence lifetime spectroscopy are combined. A pulse-modulated CW laser is employed for excitation of the particles. The characteristics and the repetition rate of the excitation pulses can be readily adjusted to accommodate for fluorescence decays having a wide range of lifetimes. 12 figs.

Deka, C.; Steinkamp, J.A.

1999-06-01T23:59:59.000Z

142

Source Apportionment of Wastewater Using Bayesian Analysis of Fluorescence Spectroscopy.  

E-Print Network (OSTI)

??This research uses Bayesian analysis of fluorescence spectroscopy results to determine if wastewater from the Heber Valley Special Service District (HVSSD) lagoons in Midway, UT… (more)

Blake, Daniel B.

2014-01-01T23:59:59.000Z

143

Fluorescent Pigments for High-Performance Cool Roofing and Facades...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

3 Berkeley Lab Heat Island Group physicist Paul Berdahl inserts precursor solution into a furnace. After boiling and then combustion, a fluorescent red pigment is formed. Image:...

144

Broccoli: Rapid Selection of an RNA Mimic of Green Fluorescent Protein by Fluorescence-Based Selection and Directed Evolution  

Science Journals Connector (OSTI)

Broccoli: Rapid Selection of an RNA Mimic of Green Fluorescent Protein by Fluorescence-Based Selection and Directed Evolution ... The green-fluorescent protein (GFP) that functions as a bioluminescence energy transfer acceptor in the jellyfish Aequorea was renatured with ?90% yield following acid, base, or guanidine denaturation. ... Detailed output, in the form of structure plots with or without reliability information, single strand frequency plots and energy dot plots', are available for the folding of single sequences. ...

Grigory S. Filonov; Jared D. Moon; Nina Svensen; Samie R. Jaffrey

2014-10-22T23:59:59.000Z

145

Perceptions of compact fluorescent lamps in the residential market  

SciTech Connect

Compact fluorescent lamps offer significant energy savings over other forms of residential lighting and last up to 10 times longer than conventional incandescent bulbs. In order to better understand existing barriers to acceptance and future opportunities for growth of compact fluorescent lighting in the residential retrofit sector, a three stage research project was designed and conducted by MACRO Consulting, Inc. Assessment of whether or not the benefits of compact fluorescent lamps are sufficient to overcome price resistance was one of the major purposes of this project. Residential customers were interviewed in focus group sessions to help determine key issues and motivating forces in the lighting/energy saving/cost saving equation. Residential customers in 5 major market areas were contacted by telephone, and data about their awareness, knowledge and use of compact fluorescent lighting were collected. These customers also participated in an attribute rating exercise in which compact fluorescent lamps were compared with fluorescent tubes and incandescent bulbs on a series of product attributes. A price elasticity exercise was also conducted. Teleconferences with retailers of compact fluorescent lamps were conducted in order to explore their knowledge of and attitudes towards compact fluorescent lamps. Customers agree that energy savings and longer life are both positive attributes for residential lighting products, but they are not yet ready to make the switch away from inexpensive, versatile and readily available incandescent bulbs to compact fluorescent lamps. Compact fluorescent lamps are rated poorly (even by satisfied'' users) on each of seven positive attributes of home lighting. Major barriers to increased use of compact fluorescent lamps include price, convenience, and performance. Prices above $10 are considered outrageous''. Product improvements are needed for appearance, light output and versatility.

Weiner, J.; Campbell, C.J. (Macro Consulting, Inc., Mountain View, CA (United States))

1992-07-01T23:59:59.000Z

146

Lighting Group: Sources and Ballasts: OLED Cathodes  

NLE Websites -- All DOE Office Websites (Extended Search)

OLED Cathodes OLED Cathodes Development of New Cathodes for OLED's Objective The objective of this project is to develop improved cathodes for use in organic light emitting diodes (OLEDs). Approach A major challenge for organic light emitting diode (OLED) technology is to improve electron injection into the organic electroluminescent layer, which limits the efficiency of the device and the luminous flux per unit area. This project aims at overcoming such barriers by developing “structured cathodes” based on functional materials (nanotubes and nanoclusters) with characteristic size smaller than the optical wavelength. The incorporation of such nanostructured cathodes in OLEDs can significantly improve device efficiency by lowering operating voltage, and increase device stability and light extraction.

147

Low Temperature Fluorescence Studies of Crude Petroleum Oils  

Science Journals Connector (OSTI)

(26) However, it has to be noted that dilution of crude petroleum oils radically changes the photophysics of fluorescence emission and, as such, the Shpol’skii method is not suitable for exploring crude oil fluorescence from neat, undiluted oils. ... with shorter wavelength excitation (to 325 nm); all crude petroleums have nearly the same relative dependence of quantum yield on excitation wavelength. ...

Peter Owens; Alan G. Ryder

2011-09-14T23:59:59.000Z

148

A monomeric red fluorescent protein Robert E. Campbell*, Oded Tour*  

E-Print Network (OSTI)

A monomeric red fluorescent protein Robert E. Campbell*, Oded Tour* , Amy E. Palmer*, Paul A, and the obligate tetramerization of the red fluorescent protein from Discosoma (DsRed). Although the weak, the obligate tet- ramerization of DsRed has greatly hindered its use as a genetically encoded fusion tag. We

Tsien, Roger Y.

149

Fluorescent Sensors for Zn2+ Based on a Fluorescein Platform  

E-Print Network (OSTI)

Fluorescent Sensors for Zn2+ Based on a Fluorescein Platform: Synthesis, Properties fluorescent sensors for Zn2+ that utilize fluorescein as a reporting group, Zinpyr-1 and Zinpyr-2, have been. Both Zinpyr sensors have excitation and emission wavelengths in the visible range (500 nm

Tsien, Roger Y.

150

Green Fluorescent Protein Is Lighting Up Fungal Biology  

Science Journals Connector (OSTI)

...MINIREVIEW Green Fluorescent Protein Is Lighting Up Fungal Biology J. M. Lorang R...naturally occur, in a lab or a contained greenhouse, will present other challenges. However...host. . Green fluorescent protein is lighting up fungal biology. | Department of Botany...

J. M. Lorang; R. P. Tuori; J. P. Martinez; T. L. Sawyer; R. S. Redman; J. A. Rollins; T. J. Wolpert; K. B. Johnson; R. J. Rodriguez; M. B. Dickman; L. M. Ciuffetti

2001-05-01T23:59:59.000Z

151

Multicontrast photoacoustic in vivo imaging using near-infrared fluorescent  

E-Print Network (OSTI)

Multicontrast photoacoustic in vivo imaging using near-infrared fluorescent proteins Arie Krumholz1 the application of two spectrally distinct near-infrared fluorescent proteins, iRFP670 and iRFP720, engineered-tissue PAT, probes absorbing in the near-infrared (NIR) spectral range are desirable. In the NIR optical

Verkhusha, Vladislav V.

152

Full-wavelet approach for fluorescence diffuse optical tomography  

E-Print Network (OSTI)

Full-wavelet approach for fluorescence diffuse optical tomography with structured illumination Leonardo da Vinci 32, I-20133 Milan, Italy 3 Centre for Medical Image Computing, University College London); published October 28, 2010 We present a fast reconstruction method for fluorescence optical tomography

Boyer, Edmond

153

Abstract 4138: Fluorescence laparoscopy with an LED light source enables fluorescence-guided resection of pancreatic cancer, labeled with fluorophore-conjugated antibodies, in mouse models.  

Science Journals Connector (OSTI)

...4138: Fluorescence laparoscopy with an LED light source enables fluorescence-guided...495-nm emission filter and a Stryker L9000 LED light source 24 hours after tail vein injection...Bouvet. Fluorescence laparoscopy with an LED light source enables fluorescence-guided...

Cristina A. Metildi; Sharmeela Kaushal; George A. Luiken; Mark A. Talamini; Robert M. Hoffman; Michael Bouvet

2013-04-15T23:59:59.000Z

154

Nuclear Resonance Fluorescence for Materials Assay  

SciTech Connect

This paper discusses the use of nuclear resonance fluorescence (NRF) techniques for the isotopic and quantitative assaying of radioactive material. Potential applications include age-dating of an unknown radioactive source, pre- and post-detonation nuclear forensics, and safeguards for nuclear fuel cycles Examples of age-dating a strong radioactive source and assaying a spent fuel pin are discussed. The modeling work has ben performed with the Monte Carlo radiation transport computer code MCNPX, and the capability to simulate NRF has bee added to the code. Discussed are the limitations in MCNPX?s photon transport physics for accurately describing photon scattering processes that are important contributions to the background and impact the applicability of the NRF assay technique.

Quiter, Brian J.; Ludewigt, Bernhard; Mozin, Vladimir; Prussin, Stanley

2009-06-29T23:59:59.000Z

155

Nuclear Resonance Fluorescence for Materials Assay  

SciTech Connect

This paper discusses the use of nuclear resonance fluorescence (NRF) techniques for the isotopic and quantitative assaying of radioactive material. Potential applications include age-dating of an unknown radioactive source, pre- and post-detonation nuclear forensics, and safeguards for nuclear fuel cycles Examples of age-dating a strong radioactive source and assaying a spent fuel pin are discussed. The modeling work has ben performed with the Monte Carlo radiation transport computer code MCNPX, and the capability to simulate NRF has bee added to the code. Discussed are the limitations in MCNPX's photon transport physics for accurately describing photon scattering processes that are important contributions to the background and impact the applicability of the NRF assay technique.

Quiter, Brian; Ludewigt, Bernhard; Mozin, Vladimir; Prussin, Stanley

2009-06-05T23:59:59.000Z

156

X-Ray Fluorescence (XRF) | Open Energy Information  

Open Energy Info (EERE)

X-Ray Fluorescence (XRF) X-Ray Fluorescence (XRF) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: X-Ray Fluorescence (XRF) Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Rock Lab Analysis Parent Exploration Technique: Rock Lab Analysis Information Provided by Technique Lithology: Bulk and trace element analysis of rocks, minerals, and sediments. Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png X-Ray Fluorescence (XRF): X-Ray Fluorescence is a lab-based technique used for bulk chemical analysis of rock, mineral, sediment, and fluid samples. The technique depends on the fundamental principles of x-ray interactions with solid materials, similar

157

X-RAY FLUORESCENCE MICROPROBE (XFM) TECHNIQUES AND CAPABILITIES  

NLE Websites -- All DOE Office Websites (Extended Search)

RAY FLUORESCENCE MICROPROBE (XFM) RAY FLUORESCENCE MICROPROBE (XFM) TECHNIQUES AND CAPABILITIES APPLICATIONS WORLD-LEADING MICROFOCUSED EXAFS SPECTROSCOPY * XFM is an optimized three-pole wiggler beamline for the characterization of materials in an "as-is" state that are chemically heterogeneous at the micrometer scale via synchrotron induced X-ray fluorescence. * XFM includes instrumentation for microbeam X-ray fluorescence (µXRF), diffraction (µXRD) and fluorescence computed microtomography (FCMT) . However, it is optimized to provide users state-of-the-art microfocused Extended X-ray Absorption Fine Structure (µEXAFS) spectroscopy between 4 to 20 keV. * XFM will trade-off beam size and flux for sample configuration flexibility. This includes more readily achievable stability

158

L-Shell Fluorescence Yields of Pt, Tl, and Pb  

Science Journals Connector (OSTI)

Partial L-shell fluorescence yields for three heavy elements have been measured using an x-ray coincidence counting method. Vacancies in the K shell of the atom are produced either by K-electron capture or internal conversion of a nuclear gamma ray in the K shell. The coincidence rate between the K and L x rays observed after the creation of the K vacancy determines the partial fluorescence yield, ?KL. This quantity is defined as the fluorescence yield of those vacancies in the L shell created by K?1 and K?2 x-ray emission. In some cases, it was also possible to determine the partial fluorescence yield, ?LL of the L shell following L-electron capture. The results obtained are in reasonable agreement with previous measurements. The relationship between ?KL, ?LL, and the fluorescence yields of individual L subshells is discussed.

R. C. Jopson; Hans Mark; C. D. Swift

1962-12-15T23:59:59.000Z

159

Fluorescence cross section measurements of biological agent simulants  

SciTech Connect

Fluorescence is a powerful technique that has potential uses in detection and characterization of biological aerosols both in the battlefield and in civilian environments. Fluorescence techniques can be used with ultraviolet (UV) light detection and ranging (LIDAR) equipment to detect biological aerosol clouds at a distance, to provide early warning of a biological attack, and to track an potentially noxious cloud. Fluorescence can also be used for detection in a point sensor to monitor biological materials and to distinguish agents from benign aerosols. This work is part of a continuing program by the Army`s Chemical and Biological Defense Command to characterized the optical properties of biological agents. Reported here are ultraviolet fluorescence measurements of Bacillus megaterium and Bacillus Globigii aerosols suspended in an electrodynamic particle trap. Fluorescence spectra of a common atmospheric aerosol, pine pollen, are also presented.

Stephens, J.R.

1996-11-01T23:59:59.000Z

160

Green Fluorescent Protein Reporter System with Transcriptional Sequence Heterogeneity for Monitoring the Interferon Response  

Science Journals Connector (OSTI)

...immediate free access to this article. Green Fluorescent Protein Reporter System with...validated a live cell-based enhanced green fluorescent protein (EGFP) reporter system...validated a live cell-based enhanced green fluorescent protein (EGFP) reporter system...

Linah Mahmoud; Maher Al-Saif; Haitham M. Amer; Mustafa Sheikh; Fahad N. Almajhdi; Khalid S. A. Khabar

2011-07-13T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Mercury Lamps Recycling Fluorescent light-tubes, compact fluorescent bulbs, mercury and sodium vapor lamps, ultraviolet and  

E-Print Network (OSTI)

Mercury Lamps Recycling Fluorescent light-tubes, compact fluorescent bulbs, mercury and sodium vapor lamps, ultraviolet and HID (high-intensity discharge) lamps and all other mercury containing labeled for shipment to a recycling plant for mercury, glass and aluminum recovery. The beneficial re

Baker, Chris I.

162

A Red Cy3-Based Biarsenical Fluorescent Probe Targeted to a Complement...  

NLE Websites -- All DOE Office Websites (Extended Search)

Red Cy3-Based Biarsenical Fluorescent Probe Targeted to a Complementary Binding Peptide. A Red Cy3-Based Biarsenical Fluorescent Probe Targeted to a Complementary Binding Peptide....

163

Sustainable LED Fluorescent Light Replacement Technology  

SciTech Connect

Ilumisys and the National Center for Manufacturing Sciences (NCMS) partnered on a three-year project awarded by the United States (U.S.) Department of Energy (DOE), to quantify the impacts of LED lamps, incandescent lamps and fluorescent benchmark lamps over a product lifecycle – i.e. to develop a sustainable design and manufacturing strategy that addresses product manufacturing, use, recycling and disposal scenarios for LED-based lighting. Based on the knowledge gained from extensive product tear-down studies of fluorescent and screw-in lighting products, lifecycle assessment tools, and accelerated lifecycle testing protocols, an interactive Sustainable LED Design Guide has been developed to aid architectural and lighting designers and engineers in making design decisions that consider three important environmental impacts (greenhouse gas emissions, energy use and mercury emission) across all phases of the life of an LED lighting product. Critical information developed for the lifecycle analysis and product feature comparisons is the useful life of the lighting product as well as its performance. The Design Guide is available at www.ncms.org, and was developed based on operational and durability testing of a variety of lighting products including power consumption, light output, and useful life of a lamp in order to allow a more realistic comparison of lamp designs. This report describes the main project tasks, results and innovative features of the lifecycle assessment (LCA)-based design tools, and the key considerations driving the sustainable design of LED lighting systems. The Design Guide incorporates the following three novel features for efficiently evaluating LED lighting features in value-chains: • Bill-of-Materials (BOM) Builder – Designers may import process data for each component and supply functional data for the product, including power, consumption, lumen output and expected useful life. • Environmental Impact Review – Designs are comparable across lifecycle phases, subsystems, and environmental impact category, and can be normalized to a userdefined functional unit. • Drill-down Review – These provide an indepth look at individual lamp designs with the ability to review across subsystem or lifecycle phase.

None

2011-06-30T23:59:59.000Z

164

Covered Product Category: Fluorescent Luminaires | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fluorescent Luminaires Fluorescent Luminaires Covered Product Category: Fluorescent Luminaires October 7, 2013 - 10:52am Addthis Did You Know? Lighting Can Help You Accomplish Other Facility Upgrades and Efficiency Improvements Facilities with significant potential savings in lighting may be able to bundle lighting upgrades with heating, ventilation, air conditioning, and other energy conservation measures into a Utility Energy Service Contract (UESC) or Energy Savings Performance Contract (ESPC). Because of the substantial cost and energy savings potential, replacing lighting can be a key component in financing facility retrofits. The funding portion of the FEMP website offers more information on these and other funding opportunities. FEMP provides acquisition guidance and Federal efficiency requirements

165

Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry  

SciTech Connect

We report single-molecule fluorescence spectroelectrochemistry on a clay-modified ITO electrode using cresyl violet as a redox fluorescent probe. Ensemble averaged experiments show that cresyl violet displays well-defined cyclic voltammograms when adsorbed on the clay-modified electrode. By probing the fluorescence intensity of a single cresyl violet molecule absorbed on clay surface, we can trace the redox reaction of individual molecules induced by the cyclic voltammetric potential scanning. Inhomogeneous interfacial electron transfer dynamics of the immobilized single cresyl violet molecules on the clay-modified surface were observed.

Lei, Chenghong; Hu, Dehong; Ackerman, Eric J.

2009-02-11T23:59:59.000Z

166

Bottom-Up Energy Analysis System - Methodology and Results  

E-Print Network (OSTI)

Documents U.S. Rulemaking Documents TSL 4 PHP IncandescentLamps Incandescent Lamps Fluorescent Lamp Ballasts kWh/yrand T5 fluorescent tubes, incandescent lamps, CFLs, Halogen

McNeil, Michael A.

2013-01-01T23:59:59.000Z

167

Lighting the Way with Compact Fluorescent Lighting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting April 28, 2009 - 5:00am Addthis John Lippert There is a major push today to get homeowners to adopt compact fluorescent lamp (CFL) light bulbs. They have been on the market for nearly three decades, and many homeowners still do not use them widely. But the tide is definitely turning. Their availability and the percentage of homeowners familiar with the technology and purchasing them for their homes have been steadily rising. The products have improved considerably compared to early products, and their prices have plummeted. The ENERGY STAR® Change a Light, Change the World Campaign has been running now for more than half a dozen years. This campaign is designed to

168

Covered Product Category: Compact Fluorescent Lamps | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Covered Product Category: Compact Fluorescent Lamps Covered Product Category: Compact Fluorescent Lamps Covered Product Category: Compact Fluorescent Lamps October 7, 2013 - 10:48am Addthis ENERGY STAR Qualified Products Federal Energy Management Program (FEMP) provides acquisition guidance across a variety of product categories, including compact fluorescent lamps (CFLs), which are an ENERGY STAR-qualified product category. Federal laws and executive orders mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law. Most manufacturers display the ENERGY STAR label on complying models. For a model not displaying this label, check the manufacturer's literature to determine if it meets the efficiency requirements outlined by ENERGY STAR.

169

Information Resources: LED Replacements for Linear Fluorescent Lamps  

NLE Websites -- All DOE Office Websites (Extended Search)

Replacements for Linear Fluorescent Lamps Webcast Replacements for Linear Fluorescent Lamps Webcast In this June 20, 2011 webcast on LED products marketed as replacements for linear fluorescent lamps, Jason Tuenge of the Pacific Northwest National Laboratory (PNNL) discussed current Lighting Facts-listed products as well as products evaluated in the latest CALiPER reports. Eric Richman, also of PNNL, reported on a recently completed GATEWAY demonstration project, in which LED and fluorescent lamps were installed in a variety of recessed troffer luminaires for comparison in an office environment. The presentation concluded with a discussion of specifications listed in a newly updated technology fact sheet. View presentation slides View the text-alternative version View the webcast (WMV 16 MB) Download Windows Media Player

170

" A Heterodyne Laser-induced Fluorescence Technique to Determine  

NLE Websites -- All DOE Office Websites (Extended Search)

A Heterodyne Laser-induced Fluorescence Technique to Determine A Heterodyne Laser-induced Fluorescence Technique to Determine Simultaneously the Bulk and Time Varying Molecule Velocity Distribution." Inventors Ahmed Diallo, Stephane Mazouffre.The method's primary goal is to determine simultaneously the bulk a The method's primary goal is to determine simultaneously the bulk and the time verying part of the molecule velocity distribution using a heterodyne laser induced fluorescence technique. Used in biology, chemistry and plasma physics laser-induced fluorescence is a well known technique to resolve the bulk velocity distribution of probed molecules and atoms in a medium. The novel approach is aimed at determining not only the bulk distribution, but also the time-varying velocity distribution. The two parts of the velocity distribution are key in the characterization of a

171

A continuous reading fluorescence meter for eddy diffusion studies  

E-Print Network (OSTI)

LIBRARY A AIS COLLEGE OF TEXAS A CONTINUOUS READINO FLUORESCENCE METER FOR EDDY DIFFUSION STUDIES BY Frank Wooten Moon, Jr. A Thesis Submitted to ths Qraduate Scbool of the Agricultural and Mechanical College oi' Texas in partial...

Moon, Frank Wooten

1956-01-01T23:59:59.000Z

172

LIGHT-INDUCED CHANGES IN THE FLUORESCENCE YIELD OF  

E-Print Network (OSTI)

a in system II, the system which sensitizes the oxygen-evolving reaction (7-14). The factor controlling fluorescence intensity is the redox state of Q, the electron acceptor in the system It reaction center (9). Fig

Govindjee

173

Calibration of fluorescence resonance energy transfer in microscopy  

DOE Patents (OSTI)

Imaging hardware, software, calibrants, and methods are provided to visualize and quantitate the amount of Fluorescence Resonance Energy Transfer (FRET) occurring between donor and acceptor molecules in epifluorescence microscopy. The MicroFRET system compensates for overlap among donor, acceptor, and FRET spectra using well characterized fluorescent beads as standards in conjunction with radiometrically calibrated image processing techniques. The MicroFRET system also provides precisely machined epifluorescence cubes to maintain proper image registration as the sample is illuminated at the donor and acceptor excitation wavelengths. Algorithms are described that pseudocolor the image to display pixels exhibiting radiometrically-corrected fluorescence emission from the donor (blue), the acceptor (green) and FRET (red). The method is demonstrated on samples exhibiting FRET between genetically engineered derivatives of the Green Fluorescent Protein (GFP) bound to the surface of Ni chelating beads by histidine-tags.

Youvan, Douglas C. (San Jose, CA); Silva, Christopher M. (Sunnyvale, CA); Bylina, Edward J. (San Jose, CA); Coleman, William J. (Moutain View, CA); Dilworth, Michael R. (Santa Cruz, CA); Yang, Mary M. (San Jose, CA)

2002-09-24T23:59:59.000Z

174

Engineering cell-fluorescent ion track hybrid detectors  

Science Journals Connector (OSTI)

The lack of sensitive biocompatible particle track detectors has so far limited parallel detection of physical energy deposition and biological response. Fluorescent nuclear track detectors (FNTDs) based on Al2O3

Martin Niklas; Steffen Greilich; Claudius Melzig; Mark S Akselrod…

2013-06-01T23:59:59.000Z

175

Lighting the Way with Compact Fluorescent Lighting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting Lighting the Way with Compact Fluorescent Lighting April 28, 2009 - 5:00am Addthis John Lippert There is a major push today to get homeowners to adopt compact fluorescent lamp (CFL) light bulbs. They have been on the market for nearly three decades, and many homeowners still do not use them widely. But the tide is definitely turning. Their availability and the percentage of homeowners familiar with the technology and purchasing them for their homes have been steadily rising. The products have improved considerably compared to early products, and their prices have plummeted. The ENERGY STAR® Change a Light, Change the World Campaign has been running now for more than half a dozen years. This campaign is designed to

176

Rapid identification of bacteria using an umbelliferone fluorescent assay  

E-Print Network (OSTI)

RAPID IDENTIFICATION OF BACTERIA USING AN UMBELLIFERONE FLUORESCENT ASSAY A Thesis by RICHARD THOMAS CHAMBLIN, JR, Submitted to the Graduate College of' Texas A&M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE August 1983 Major Subject: Veterinary Microbiology RAPID IDENTIFICATION OF BACTERIA USING AN UMBELLIFERONE FLUORESCENT ASSAY A Thesis by RICHARD THOMAS CHAMBLIN, JR ~ Approved as to style and content by ( -Chairman of Committee) John M...

Chamblin, Richard Thomas

1983-01-01T23:59:59.000Z

177

A light diet for a giant appetite: An assessment of China's proposed fluorescent lamp standard  

E-Print Network (OSTI)

standard for linear fluorescent lamps Length (mm) Minimum efficacy (lm/W) Efficacy for energy conservation

Lin, Jiang

2002-01-01T23:59:59.000Z

178

Fluorescent analysis of interaction of flavonols with hemoglobin and bovine serum albumin  

Science Journals Connector (OSTI)

We have studied the fluorescent properties of flavonols (quercetin, fisetin, morin, rutin) with the aim of...

V. V. Sentchouk; E. V. Bondaryuk

2007-09-01T23:59:59.000Z

179

Development of rapid microbial methods for lysine quantification in feed ingredients based on green fluorescent protein fluorescence  

E-Print Network (OSTI)

fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Steven C. Ricke Committee Members, Deborah Siegele Jean Gould Dorothy Shippen Chair of Molecular... on Green Fluorescent Protein Fluorescence. (December 2005) Vesela I. Chalova-Zhekova, Diplom., Higher Institute of Food and Flavor Industries Chair of Advisory Committee: Dr. Steven Ricke Lysine is one of the more limiting amino acids in protein...

Chalova-Zhekova, Vesela I.

2007-04-25T23:59:59.000Z

180

Energy Cost Calculator for Compact Fluorescent Lamps | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Compact Fluorescent Lamps Compact Fluorescent Lamps Energy Cost Calculator for Compact Fluorescent Lamps October 8, 2013 - 2:18pm Addthis This tool calculates the payback period for your calc retrofit project. Modify the default values to suit your project requirements. Existing incandescent lamp wattage Watts Incandescent lamp cost dollars Incandescent lamp life 1000 hours calc wattage Watts calc cost dollars calc life (6000 hours for moderate use, 10000 hours for high use) 8000 hours Number of lamps in retrofit project Hours operating per week hours Average cost of electricity 0.06 $/kWh Relamper labor costs $/hr Time taken to retrofit all lamps in this project min Time taken to relamp one lamp min Type of Relamping Practiced: Group Relamping: Calculate Simple Payback Period months

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

A Bright Idea: New Efficiency Standards for Incandescent and Fluorescent  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Bright Idea: New Efficiency Standards for Incandescent and A Bright Idea: New Efficiency Standards for Incandescent and Fluorescent Lights A Bright Idea: New Efficiency Standards for Incandescent and Fluorescent Lights July 21, 2009 - 5:18pm Addthis John Lippert Pretty soon, lighting is going to get a lot more efficient. New standards for incandescent reflector bulbs, general purpose fluorescent bulbs, and regular incandescent bulbs are going into effect beginning in approximately three years. You may be curious about how these standards will affect the most popular types of incandescent bulbs we've all used for so long: the common non-reflector 40-watt, 60-watt, 75-watt, and 100-watt bulbs. The Energy Independence and Security Act of 2007 (also known as EISA) requires that these incandescent bulbs use 30% less energy than today's

182

Laser-induced differential normalized fluorescence method for cancer diagnosis  

DOE Patents (OSTI)

An apparatus and method for cancer diagnosis are disclosed. The diagnostic method includes the steps of irradiating a tissue sample with monochromatic excitation light, producing a laser-induced fluorescence spectrum from emission radiation generated by interaction of the excitation light with the tissue sample, and dividing the intensity at each wavelength of the laser-induced fluorescence spectrum by the integrated area under the laser-induced fluorescence spectrum to produce a normalized spectrum. A mathematical difference between the normalized spectrum and an average value of a reference set of normalized spectra which correspond to normal tissues is calculated, which provides for amplifying small changes in weak signals from malignant tissues for improved analysis. The calculated differential normalized spectrum is correlated to a specific condition of a tissue sample. 5 figs.

Vo-Dinh, T.; Panjehpour, M.; Overholt, B.F.

1996-12-03T23:59:59.000Z

183

Laser-induced differential normalized fluorescence method for cancer diagnosis  

DOE Patents (OSTI)

An apparatus and method for cancer diagnosis are disclosed. The diagnostic method includes the steps of irradiating a tissue sample with monochromatic excitation light, producing a laser-induced fluorescence spectrum from emission radiation generated by interaction of the excitation light with the tissue sample, and dividing the intensity at each wavelength of the laser-induced fluorescence spectrum by the integrated area under the laser-induced fluorescence spectrum to produce a normalized spectrum. A mathematical difference between the normalized spectrum and an average value of a reference set of normalized spectra which correspond to normal tissues is calculated, which provides for amplifying small changes in weak signals from malignant tissues for improved analysis. The calculated differential normalized spectrum is correlated to a specific condition of a tissue sample.

Vo-Dinh, Tuan (Knoxville, TN); Panjehpour, Masoud (Knoxville, TN); Overholt, Bergein F. (Knoxville, TN)

1996-01-01T23:59:59.000Z

184

BIOCOMPATIBLE FLUORESCENT MICROSPHERES: SAFE PARTICLES FOR MATERIAL PENETRATION STUDIES  

SciTech Connect

Biocompatible polymers with hydrolyzable chemical bonds have been used to produce safe, non-toxic fluorescent microspheres for material penetration studies. The selection of polymeric materials depends on both biocompatibility and processability, with tailored fluorescent properties depending on specific applications. Microspheres are composed of USFDA-approved biodegradable polymers and non-toxic fluorophores and are therefore suitable for tests where human exposure is possible. Micropheres were produced which contain unique fluorophores to enable discrimination from background aerosol particles. Characteristics that affect dispersion and adhesion can be modified depending on use. Several different microsphere preparation methods are possible, including the use of a vibrating orifice aerosol generator (VOAG), a Sono-Tek atomizer, an emulsion technique, and inkjet printhead. Applications for the fluorescent microspheres include challenges for biodefense system testing, calibrants for biofluorescence sensors, and particles for air dispersion model validation studies.

Farquar, G; Leif, R

2009-07-15T23:59:59.000Z

185

Fluorescent spectra of chromatographic fractions of crude oils  

E-Print Network (OSTI)

Number 4 exhibits the j400 Ao peak. Again all Fig. 7 0 Fluorescent Spectra of n-heptane Fraction, Cut No. 2 ()) 0 fE 30 ( 3) / (lI I I I I (&) )/ I 000 travelength in Ao significant intensity ranges from 3400 A to 4600 A... as $ Transnlssion Cyclohexane Fraction 7'ave Length& Ao Relative Fluorescent Intensity ude o 3000 3100 3200 3300 3400 3500 3600 3F' jwo 4100 4200 4300 4400 4500 4600 QOO 4900 5000 5200 5400 56OO 5'800 6000 65oo 7000 Oe0 Oeo O. e 2 ' 4...

Dixon, William Samuel

2012-06-07T23:59:59.000Z

186

A versatile detector for total fluorescence and electron yield experiments  

SciTech Connect

The combination of a non-coated silicon photodiode with electron repelling meshes makes a versatile detector for total fluorescence yield and electron yield techniques highly suitable for x-ray absorption spectroscopy. In particular, a copper mesh with a bias voltage allows to suppress or transmit the electron yield signal. The performance of this detection scheme has been characterized by near edge x-ray absorption fine structure studies of thermal oxidized silicon and sapphire. The results show that the new detector probes both electron yield and for a bias voltage exceeding the maximum photon energy the total fluorescence yield.

Thielemann, N. [Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin fuer Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin (Germany); Institut fuer Physik, Humboldt-Universitaet zu Berlin, Newtonstrasse 15, 12489 Berlin (Germany); Hoffmann, P. [Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin fuer Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin (Germany); Foehlisch, A. [Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin fuer Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin (Germany); Institut fuer Physik und Astronomie, Universitaet Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam (Germany)

2012-09-15T23:59:59.000Z

187

BIOCOMPATIBLE FLUORESCENT MICROSPHERES: SAFE PARTICLES FOR MATERIAL PENETRATION STUDIES  

SciTech Connect

Biocompatible polymers with hydrolyzable chemical bonds are being used to produce safe, non-toxic fluorescent microspheres for material penetration studies. The selection of polymeric materials depends on both biocompatibility and processability, with tailored fluorescent properties depending on specific applications. Microspheres are composed of USFDA-approved biodegradable polymers and non-toxic fluorophores and are therefore suitable for tests where human exposure is possible. Micropheres are being produced which contain unique fluorophores to enable discrimination from background aerosol particles. Characteristics that affect dispersion and adhesion can be modified depending on use. Several different microsphere preparation methods are possible, including the use of a vibrating orifice aerosol generator (VOAG), a Sono-Tek atomizer, an emulsion technique, and inkjet printhead. The advantages and disadvantages of each method will be presented and discussed in greater detail along with fluorescent and charge properties of the aerosols. Applications for the fluorescent microspheres include challenges for biodefense system testing, calibrants for biofluorescence sensors, and particles for air dispersion model validation studies.

farquar, G; Leif, R

2008-09-12T23:59:59.000Z

188

Supporting Information for: Synthetic Control of Green Fluorescent Protein (GFP)  

E-Print Network (OSTI)

, and then using DNA ligase to insert synthetic oligonucleotides containing the loop sequence were inserted usingS1 Supporting Information for: Synthetic Control of Green Fluorescent Protein (GFP) Kevin P. Kent the genes in pET-15b with restriction enzymes that cut the DNA close to the desired loop insertion site

Boxer, Steven G.

189

A genetically encoded fluorescent reporter of ATP:ADP ratio  

E-Print Network (OSTI)

A genetically encoded fluorescent reporter of ATP:ADP ratio Jim Berg1,2, Yin Pun Hung1 & Gary's affinity for Mg-ATP was o100 nM, as seen for other members of the bacterial PII regulator family, a surprisingly high affinity given that normal intracellular ATP concentration is in the millimolar range. ADP

Yellen, Gary

190

Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes  

E-Print Network (OSTI)

1 Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes by Single Molecule Reactions with individual single-walled carbon nanotubes are observed, and luminescence quenching analysis reveals the diffusional range of excitons in semiconducting nanotubes. *To whom correspondence should be addressed

Paris-Sud XI, Université de

191

Spotlights on Recent JACS Publications FLUORESCENT PROBES LIGHT UP AMYLOID  

E-Print Network (OSTI)

the conductance, or transport, of ions across the membrane. Researchers have exploited the efficient transport investigated the mechanism of ion transport through several structural variants of fluorescent oligoester: the channel's ion transport activity slowly decreased over time. The researchers used steady-state and time

Theodorakis, Emmanuel

192

Cellubrevin-targeted Fluorescence Uncovers Heterogeneity in the Recycling Endosomes*  

E-Print Network (OSTI)

Cellubrevin-targeted Fluorescence Uncovers Heterogeneity in the Recycling Endosomes* (Received, University of California, Berkeley, California 94720-3200 The pH and trafficking of recycling endosomes have-enriched recycling endosomes (pHCb) and FITC-transferrin to measure the pH of transferrin- enriched recycling

Machen, Terry E.

193

REVIEW Open Access Environment-sensitive behavior of fluorescent  

E-Print Network (OSTI)

REVIEW Open Access Environment-sensitive behavior of fluorescent molecular rotors Mark A Haidekker1 and the molecular-scale interaction of a molecular rotor with its environment are not fully understood. This review rotors as microviscosity sensors are reviewed, and engineering aspects are presented on how measurement

Theodorakis, Emmanuel

194

Optical gating of perylene bisimide fluorescence using dithienylcyclopentene photochromic switches  

SciTech Connect

The emission of millions of fluorescence photons from a chromophore is controlled by the absorption of a few tens of photons in a photochromic molecule. The parameters that determine the efficiency of this process are investigated, providing insights for the development of an all-optical gate.

Pärs, Martti; Köhler, Jürgen, E-mail: juergen.koehler@uni-bayreuth.de [Experimental Physics IV, University of Bayreuth, 95440 Bayreuth (Germany)] [Experimental Physics IV, University of Bayreuth, 95440 Bayreuth (Germany); Gräf, Katja; Bauer, Peter; Thelakkat, Mukundan [Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth (Germany)] [Applied Functional Polymers, University of Bayreuth, 95440 Bayreuth (Germany)

2013-11-25T23:59:59.000Z

195

Combined single-molecule force and fluorescence measurements for biology  

E-Print Network (OSTI)

Minireview Combined single-molecule force and fluorescence measurements for biology Mark I Wallace, some of which allow cellular processes to be examined at the level of a single molecule. In particular of resolv- ing single molecules in aqueous solution at room tempera- ture [1-7]. Now that the field is over

Wallace, Mark

196

Benchmarking Various Green Fluorescent Protein Variants in Bacillus subtilis, Streptococcus pneumoniae, and Lactococcus lactis for Live Cell Imaging  

Science Journals Connector (OSTI)

...research-article Methods Benchmarking Various Green Fluorescent Protein Variants in Bacillus...contributed equally to this article. Green fluorescent protein (GFP) offers efficient...INTRODUCTION The use of Aequorea victoria green fluorescent protein (GFP) and its derivatives...

Wout Overkamp; Katrin Beilharz; Ruud Detert Oude Weme; Ana Solopova; Harma Karsens; Ákos T. Kovács; Jan Kok; Oscar P. Kuipers; Jan-Willem Veening

2013-08-16T23:59:59.000Z

197

Understanding Zinc Quantification with Existing and Advanced Ditopic Fluorescent Zinpyr Sensors  

E-Print Network (OSTI)

Treatment of aqueous zinc solutions with incremental additions of a ditopic fluorescent sensor of the Zinpyr family, based on pyridine/pyrazine-containing metal recognition units, affords a fluorescence titration curve ...

Buccella, Daniela

198

E-Print Network 3.0 - absolute fluorescence yield Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

the fluorescence quantum yields, s and r... ) and 3(c) show the absolute TPE spectra for green- and red-fluorescence, respectively. The TPE spectra... Measurement of two-photon...

199

Gold Nanoparticle Enlargement Coupled with Fluorescence Quenching for Highly Sensitive Detection of Analytes  

Science Journals Connector (OSTI)

We report a versatile and facile route for highly sensitive detection of analytes through coupling the enlargement of gold nanoparticles with fluorescence quenching. The fluorescence intensity of dye molecules (e.g., fluorescein or rhodamine B) ...

Seong Yoon Lim; Jae Hong Kim; Joon Seok Lee; Chan Beum Park

2009-10-29T23:59:59.000Z

200

Laser- and UV-LED-Induced Fluorescence Detection of Drinking Water and Water-Dissolved Organics  

Science Journals Connector (OSTI)

We have developed a deep-UV laser-induced fluorescence system for fluorescence detection of water-dissolved organic species. Deep-UV LEDs also were used as the excitation source....

Sharikova, Anna V; Killinger, Dennis K

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Detection of Ethylene Gas by Fluorescence Turn-On of a Conjugated Polymer  

E-Print Network (OSTI)

Ripe fruits: The fluorescence of a conjugated polymer is quenched by the presence of copper(I) moieties. Upon exposure to ethylene gas the copper complexes bind to ethylene and no longer quench the polymer fluorescence ...

Swager, Timothy Manning

202

Fluorescent Amino Acids: Modular Building Blocks for the Assembly of New Tools for Chemical Biology  

E-Print Network (OSTI)

Fluorescence spectroscopy is a powerful tool for probing complex biological processes. The ubiquity of peptide–protein and protein–protein interactions in these processes has made them important targets for fluorescence ...

Krueger, Andrew T.

203

Extending the utility of enzymes for site-specific targeting of fluorescent probes  

E-Print Network (OSTI)

Genetically encodable fluorescence reporters such as the green fluorescent protein (GFP) are useful for studying protein expression, localization, and dynamics in a variety of biological systems. GFP and its related variants, ...

Liu, Daniel S. (Daniel Shao-Chen)

2014-01-01T23:59:59.000Z

204

Fluorescence Resonance Energy Transfer Reveals a Binding Site of a Photosensitizer for Photodynamic Therapy  

Science Journals Connector (OSTI)

...D., Kenney M. E. New phthalocyanine photosensitizers...Stryer L. Fluorescence energy transfer as a spectroscopic...39-40, Marcel Dekker Inc. New York 1993. 20 Clegg R. M. Fluorescence resonance energy transfer. Curr. Opin...

Rachel L. Morris; Kashif Azizuddin; Minh Lam; Jeffrey Berlin; Anna-Liisa Nieminen; Malcolm E. Kenney; Anna C. S. Samia; Clemens Burda; and Nancy L. Oleinick

2003-09-01T23:59:59.000Z

205

Characterization of coal oil using three-dimensional excitation and emission matrix fluorescence spectroscopy  

Science Journals Connector (OSTI)

Three-dimensional (3D) excitation-emission matrix (EEM) fluorescence spectroscopy is applied to characterize the coal oil. The results show that the 3D fluorescence spectra of coal oil...

Xiao, Xue; Zhang, Yujun; Wang, Zhigang; Jin, Dan; Yin, Gaofang; Liu, Wenqing

2009-01-01T23:59:59.000Z

206

Seminaphthofluorescein-Based Fluorescent Probes for Imaging Nitric Oxide in Live Cells  

E-Print Network (OSTI)

Fluorescent turn-on probes for nitric oxide based on seminaphthofluorescein scaffolds were prepared and spectroscopically characterized. The Cu(II) complexes of these fluorescent probes react with NO under anaerobic ...

Pluth, Michael D.

207

E-Print Network 3.0 - air fluorescence measurements Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

naphthalene with laser-induced fluorescence M. Martinez... and Physics Discussions Measuring ... Source: Ecole Polytechnique, Centre de mathmatiques Collection:...

208

DNA complexes with dyes designed for energy transfer as fluorescent markers  

DOE Patents (OSTI)

Heteromultimeric fluorophores are provided for binding to DNA, which allow for the detection of DNA in electrical separations and preparation of probes having high-fluorescent efficiencies and large Stokes shifts. In addition, by appropriate choice of fluorescent molecules, one can use a single narrow wavelength band excitation light source, while obtaining fluorescent emissions having sufficient separation to be readily discriminated.

Glazer, Alexander M. (Orinda, CA); Benson, Scott C. (Albany, CA)

1999-01-01T23:59:59.000Z

209

Real-time Fluorescent Resonance Energy Transfer Analysis to Monitor Drug Resistance in Chronic Myelogenous Leukemia  

Science Journals Connector (OSTI)

...NH2-terminal YFP (yellow mutant of green fluorescent protein) and a COOH-terminal CFP (cyan mutant of green fluorescent protein). However...conformation change and yielding an energy transfer from CFP to YFP. To...pair of fluorescent resonance energy transfer-based probes for...

Ahmet Tunceroglu; Michiyuki Matsuda; and Raymond B. Birge

2010-11-01T23:59:59.000Z

210

RAPID COMMUNICATION An Integral Membrane Green Fluorescent Protein Marker, Us9-GFP,  

E-Print Network (OSTI)

RAPID COMMUNICATION An Integral Membrane Green Fluorescent Protein Marker, Us9-GFP described GFP-spectrin, a membrane- localized derivative of the green fluorescent protein that can proteins employed in this assay. © 1999 Academic Press Key Words: green fluorescent protein; cell cycle

211

Fluorescence quenching of CdSe quantum dots on graphene  

SciTech Connect

We studied systematically the fluorescence quenching of CdSe quantum dots (QDs) on graphene and its multilayers, as well as graphene oxide (GO) and reduced graphene oxide (rGO). Raman intensity of QDs was used as a quantitatively measurement of its concentration in order to achieve a reliable quenching factor (QF). It was found that the QF of graphene (?13.1) and its multilayers is much larger than rGO (?4.4), while GO (?1.5) has the lowest quenching efficiency, which suggests that the graphitic structure is an important factor for quenching the fluorescence of QDs. It was also revealed that the QF of graphene is not strongly dependent on its thicknesses.

Guo, Xi Tao; Hua Ni, Zhen, E-mail: zhni@seu.edu.cn; Yan Nan, Hai; Hui Wang, Wen [Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189 (China)] [Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189 (China); Yan Liao, Chun [Physics Department, National Photoelectric Technology and Functional Materials and Application of Science and Technology International Cooperation Base, Northwest University, Xi'an 710069 (China)] [Physics Department, National Photoelectric Technology and Functional Materials and Application of Science and Technology International Cooperation Base, Northwest University, Xi'an 710069 (China); Zhang, Yan; Wei Zhao, Wei [Jiangsu Key Laboratory for Design and Fabrication of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189 (China)] [Jiangsu Key Laboratory for Design and Fabrication of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189 (China)

2013-11-11T23:59:59.000Z

212

Blue fluorescent organic light emitting diodes with multilayered graphene anode  

SciTech Connect

As an innovative anode for organic light emitting devices (OLEDs), we have investigated graphene films. Graphene has importance due to its huge potential in flexible OLED applications. In this work, graphene films have been catalytically grown and transferred to the glass substrate for OLED fabrications. We have successfully fabricated 2 mm × 2 mm device area blue fluorescent OLEDs with graphene anodes which showed 2.1% of external quantum efficiency at 1000 cd/m{sup 2}. This is the highest value reported among fluorescent OLEDs using graphene anodes. Oxygen plasma treatment on graphene has been found to improve hole injections in low voltage regime, which has been interpreted as oxygen plasma induced work function modification. However, plasma treatment also increases the sheet resistance of graphene, limiting the maximum luminance. In summary, our works demonstrate the practical possibility of graphene as an anode material for OLEDs and suggest a processing route which can be applied to various graphene related devices.

Hwang, Joohyun [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of)] [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of); Choi, Hong Kyw [Graphene Electronics Creative Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of)] [Graphene Electronics Creative Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of); Moon, Jaehyun; Shin, Jin-Wook; Joo, Chul Woong; Han, Jun-Han; Cho, Doo-Hee; Huh, Jin Woo [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of)] [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of); Choi, Sung-Yool [Graphene Electronics Creative Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of)] [Graphene Electronics Creative Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of); Lee, Jeong-Ik, E-mail: jiklee@etri.re.kr [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of)] [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of); Chu, Hye Yong [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of)] [OLED Lighting Research Team, Electronics and Telecommunications Research Institute (ETRI), Daejeon 305-700 (Korea, Republic of)

2012-10-15T23:59:59.000Z

213

Nanoparticle sizing method based on fluorescence anisotropy analysis  

Science Journals Connector (OSTI)

Abstract Demand for applications of nanoparticles in electric architecture has been increasing. Nanoparticles provide new opportunities for improving circuit response. We discuss a novel method for evaluating nanoparticle sizes based on fluorescence anisotropy analysis. Particle size evaluation is possible through measurements of the rotational diffusion coefficient, which is sensitive to particle size. We develop a system for measuring rotational diffusion coefficients by using a fluorescent probe to label a particle. We report fundamental experiments that verify the feasibility of the proposed method. The rotational diffusion coefficients of gold nanoparticles with diameters ranging 6–20 nm were measured using the proposed method. The measured rotational diffusion coefficients decrease with increasing particle size. This finding indicates that nanoparticles smaller than 15 nm can be measured with fine resolution.

Terutake Hayashi; Yuki Ishizaki; Masaki Michihata; Yasuhiro Takaya; Shin-Ichi Tanaka

2015-01-01T23:59:59.000Z

214

DNA fragment sizing and sorting by laser-induced fluorescence  

DOE Patents (OSTI)

A method is provided for sizing DNA fragments using high speed detection systems, such as flow cytometry to determine unique characteristics of DNA pieces from a sample. In one characterization the DNA piece is fragmented at preselected sites to produce a plurality of DNA fragments. The DNA piece or the resulting DNA fragments are treated with a dye effective to stain stoichiometrically the DNA piece or the DNA fragments. The fluorescence from the dye in the stained fragments is then examined to generate an output functionally related to the number of nucleotides in each one of the DNA fragments. In one embodiment, the intensity of the fluorescence emissions from each fragment is linearly related to the fragment length. The distribution of DNA fragment sizes forms a characterization of the DNA piece for use in forensic and research applications.

Hammond, Mark L. (Angier, NC); Jett, James H. (Los Alamos, NM); Keller, Richard A. (Los Alamos, NM); Marrone, Babetta L. (Los Alamos, NM); Martin, John C. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

215

Structural basis for reversible photobleaching of a green fluorescent protein homologue  

SciTech Connect

Fluorescent protein (FP) variants that can be reversibly converted between fluorescent and nonfluorescent states have proven to be a catalyst for innovation in the field of fluorescence microscopy. However, the structural basis of the process remains poorly understood. High-resolution structures of a FP derived from Clavularia in both the fluorescent and the light-induced nonfluorescent states reveal that the rapid and complete loss of fluorescence observed upon illumination with 450-nm light results from cis-trans isomerization of the chromophore. The photoinduced change in configuration from the well ordered cis isomer to the highly nonplanar and disordered trans isomer is accompanied by a dramatic rearrangement of internal side chains. Taken together, the structures provide an explanation for the loss of fluorescence upon illumination, the slow light-independent recovery, and the rapid light-induced recovery of fluorescence. The fundamental mechanism appears to be common to all of the photoactivatable and reversibly photoswitchable FPs reported to date.

Henderson, J. Nathan; Ai, Hui-wang; Campbell, Robert E.; Remington, S. James (Alberta); (Oregon)

2008-09-03T23:59:59.000Z

216

Microwave-Assisted Synthesis of Fluorescent Carbon Nanoparticles  

E-Print Network (OSTI)

MICROWAVE-ASSITED SYNTHESIS OF FLUORESCENT CARBON NANOPARTICLES A Thesis by BONNIE CHEN Submitted to the Office of Graduate and Professional Studies of Texas A&M University in partial fulfillment of the requirements for the degree...-(hydroxymethyl) furfural (5- HMF) derivatives, which are major products of glucose decomposition. iv ACKNOWLEDGEMENTS This thesis was completed in my fourth year at Texas A&M University as a master's student, and analyzes, discusses and displays...

Chen, Bonnie

2014-08-19T23:59:59.000Z

217

Nuclear Resonance Fluorescence and Isotopic Mapping of Containers  

SciTech Connect

National security programs have expressed interest in developing systems to isotopically map shipping containers, fuel assemblies, and waste barrels for various materials including special nuclear material (SNM). Current radiographic systems offer little more than an ambiguous density silhouette of a container's contents. In this paper we will present a system being developed at LLNL to isotopically map containers using the nuclear resonance fluorescence (NRF) method. Recent experimental measurements on NRF strengths in SNM are discussed.

Johnson, M S; McNabb, D P

2008-08-08T23:59:59.000Z

218

Development of a fluorescent antibody test for equine infectious anemia  

E-Print Network (OSTI)

. Moore The development of a direct fluorescent antibody technique for a reliable laboratory and diagnostic test for equine infectious anemia (EIA) was described. A specific antiserum was produced by inoculation of goats with EIA virus derived from... the Texas and Illinois strains of EIA virus in cell culture and in known infected horses and against the Wyoming strain of EIA virus in inoculated horses. Its specificity was further substantiated by testing it against heterologous viruses including...

Lester, Thomas Lee

1972-01-01T23:59:59.000Z

219

Dynamic fluorescence imaging with molecular agents for cancer detection  

E-Print Network (OSTI)

emission computed tomography SUV standard uptake values SLN sentinel lymph node TK tyrosine kinase TBR target to background ratio Symbols ? pharmacokinetic parameter ? pharmacokinetic parameter )(tC BOUND concentration of dye... bound to integrin receptor either in the vascular or extravascular compartments )(tC LAREXTRAVASCU concentration of dye in extravascular space )(tC VASCULAR concentration of dye in vascular space 0 I background fluorescence intensity c k...

Kwon, Sun Kuk

2009-05-15T23:59:59.000Z

220

Magnetic fluorescent lamp having reduced ultraviolet self-absorption  

DOE Patents (OSTI)

The radiant emission of a mercury-argon discharge in a fluorescent lamp assembly (10) is enhanced by providing means (30) for establishing a magnetic field with lines of force along the path of electron flow through the bulb (12) of the lamp assembly, to provide Zeeman splitting of the ultraviolet spectral line. Optimum results are obtained when the magnetic field strength causes a Zeeman splitting of approximately 1.7 times the thermal line width.

Berman, Samuel M. (San Francisco, CA); Richardson, Robert W. (Pelham, NY)

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Operating temperatures of recessed fluorescent fixtures with thermal insulation  

SciTech Connect

Tests were performed to determine steady state surface temperatures for recessed fluorescent fixtures operated with and without thermal insulation on the top side of the fixture and to identify potential problems associated with the installation of thermal insulation. In addition to measuring temperatures, means were sought by which the fixtures can be thermally insulated and operated without fire hazards or damage to the fixture. (MCW)

Yarbrough, D.W.; Toor, I.A.

1981-05-01T23:59:59.000Z

222

Photon statistics of atomic fluorescence after {pi}-pulse excitation  

SciTech Connect

The photon statistics of atomic fluorescence after {pi}-pulse excitation is investigated in a system in which the input and output ports are connected to an atom. Since spontaneous decay during input pulse excitation occurs, the output pulse generally contains a multiphoton component with a certain probability. We quantitatively evaluate the probability of the output pulse containing multiple photons and determine the conditions for ideal single-photon generation.

Yoshimi, Kazuyoshi [College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827 (Japan); Koshino, Kazuki [College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827 (Japan); PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012 (Japan)

2010-09-15T23:59:59.000Z

223

Analysis and design of closed-loop control of power electronic converter systems  

E-Print Network (OSTI)

filter system to cancel neutral current harmonic (IOOA) in a threephase four-wire electric distribution system. (b)Input power factor correction and harmonic reduction stage of a commercially available electronic ballast (12OV, 64W) for fluorescent...

Huang, Yenchin

2012-06-07T23:59:59.000Z

224

Keystone: Order (2013-CE-2601)  

Energy.gov (U.S. Department of Energy (DOE))

DOE ordered Keystone Technologies, LLC to pay a $8,000 civil penalty after finding Keystone had failed to certify that certain models of fluorescent lamp ballasts comply with the applicable energy conservation standards.

225

STATE OF CALIFORNIA CERTIFICATE OF COMPLIANCE AND FIELD INSPECTION CHECKLIST  

E-Print Network (OSTI)

Watts: 1. Type of luminaire (i.e.: post top, wall pack, surface, shoe box); for non-incandescent luminaires, indicate nominal lamp wattage and lamp type ( i.e.: fluorescent, incandescent, HID); ballast type. For incandescent luminaires, the lum

226

Energy Engineering Analysis Program (EEAP), Fort Bliss headquarters building, lighting retrofit, Fort Bliss, El Paso, Texas  

SciTech Connect

The purpose of this study is to analyze the use of high efficiency fluorescent lighting with energy efficient lamps and electronic ballast for the Headquarters Building (Bldg. number 2) at Fort Bliss.

NONE

1993-02-01T23:59:59.000Z

227

Graduate Student Lounge Andleeb Mazhar and Dr. Kristi Gaines  

E-Print Network (OSTI)

and 38 ballast types , Full Spectrum and Fluorescent lighting can bring the desired affect in our-candles are recommended. Based on the cost-effective Retrofitting Analysis lighting system from 17 distinct bulb types

Rock, Chris

228

Universal Waste Management Procedure: 8.42 Created: 7/30/2014 Version: 1.2 Revised: 7/30/2014  

E-Print Network (OSTI)

fluorescent lamps are classified as Universal Wastes due to their mercury content. Other examples of lamps pressure sodium, and metal halide lamps. It can be expected that fluorescent and HID lamps, including green batteries are managed as universal waste. 2. Lamps are defined by the above regulations as "the bulb or tube

Jia, Songtao

229

A light diet for a giant appetite: An assessment of China's proposed fluorescent lamp standard  

SciTech Connect

Lighting has been one of the fastest growing electric end-uses in China over the last twenty years, with an average annual growth rate of 14%. Fluorescent lighting provides a significant portion of China's lighting need. In 1998, China produced 680 million fluorescent lamps, of which 420 million were linear fluorescent lamps of various diameters (T8 to T12). There are substantial variations both in energy efficiency and lighting performance among locally produced fluorescent lamps. Such variations present a perfect opportunity for policy intervention through efficiency standards to promote the adoption of more efficient fluorescent lamps in China. This paper analyzes China's proposed minimum efficiency standard for fluorescent lamps and presents an assessment of its likely impacts on China's lighting energy consumption and GHG emissions.

Lin, Jiang

2002-04-11T23:59:59.000Z

230

X-ray fluorescence spectroscopy from ions at charged vapor/water interfaces  

E-Print Network (OSTI)

X-ray fluorescence spectra from monovalent ions (Cs+) that accumulate from dilute solutions to form an ion-rich layer near a charged Langmuir monolayer are presented. For the salt solution without the monolayer, the fluorescence signals below the critical angle are significantly lower than the detection sensitivity and only above the critical angle signals from the bulk are observed. In the presence of a monolayer that provides surface charges, strong fluorescence signals below the critical angle are observed. Ion density accumulated at the interface are determined from the fluorescence. The fluorescent spectra collected as a function of incident x-ray energy near the LIII edge yield the extended absorption spectra from the ions, and are compared to recent independent results. The fluorescence data from divalent Ba2+ with and without monolayer are also presented.

Wei Bu; David Vaknin

2009-05-04T23:59:59.000Z

231

Nanoscale fluorescence lifetime imaging with a single diamond NV center  

E-Print Network (OSTI)

Solid-state quantum emitters, such as artificially engineered quantum dots or naturally occurring defects in solids, are being investigated for applications ranging from quantum information science and optoelectronics to biomedical imaging. Recently, these same systems have also been studied from the perspective of nanoscale metrology. In this letter we study the near-field optical properties of a diamond nanocrystal hosting a single nitrogen vacancy center. We find that the nitrogen vacancy center is a sensitive probe of the surrounding electromagnetic mode structure. We exploit this sensitivity to demonstrate nanoscale fluorescence lifetime imaging microscopy (FLIM) with a single nitrogen vacancy center by imaging the local density of states of an optical antenna.

Ryan Beams; Dallas Smith; Timothy W. Johnson; Sang-Hyun Oh; Lukas Novotny; Nick Vamivakas

2013-03-05T23:59:59.000Z

232

Maintaining optimum fluorescent lamp performance under elevated temperature conditions  

SciTech Connect

This paper describes a new technique for optimizing fluorescent lamp performance under elevated temperature conditions. This approach uses a thermo-electric Peltier device to produce a localized cold spot temperature of approximately 40/sup 0/C, allowing the lamps to maintain maximum light output and efficacy independent of prevailing ambient temperatures inside a luminaire. Experimental data show that a 20% increase in light output and a 10% increase in efficacy over typical lamp performance in a warm fixture environment can be obtained using this device. Only 0.25 watts must be supplied to the Peltier device to produce these results.

Siminovitch, M.J.; Rubinstein, F.M.; Clark, T.A.; Verderber, R.R.

1986-04-01T23:59:59.000Z

233

Fluorescence Detector for Capillary Separations Fabricated by 3D Printing  

Science Journals Connector (OSTI)

Fluorescence Detector for Capillary Separations Fabricated by 3D Printing ... Additive manufacturing, also known as 3D printing, rapid prototyping, or solid-freeform technology, has become an efficient method for rapid prototyping and fabrication applications ranging from small home projects to architecture and industrial machining. ... Compared to the more expensive alternatives using the standard optic component, the 3D printing provides significant cost reduction and, especially, sharing of information between laboratories for easy replication or further modifications, customization of the spatial arrangement, and miniaturization. ...

Jan Prikryl; Frantisek Foret

2014-11-26T23:59:59.000Z

234

Microcavity effects on the generation,fluorescence, and diffusion of excitons in organic solar cells  

E-Print Network (OSTI)

We compute the short-circuit diffusion current of excitons in an organic solar cell, with special emphasis on fluorescence losses. The exciton diffusion length is not uniform but varies with its position within the device, even with moderate fluorescence quantum efficiency. With large quantum efficiencies, the rate of fluorescence can be strongly reduced with proper choices of the geometrical and dielectric parameters. In this way, the diffusion length can be increased and the device performance significantly improved.

Kozyreff, G; Vuong, L T; Silleras, O Nieto; Martorell, J

2013-01-01T23:59:59.000Z

235

Fluorescence of synthetic DNA's at room temperature and neutral pH  

Science Journals Connector (OSTI)

The fluorescence of two synthetic DNA's, polyd(m5C) and poly[d(I-m5C)] is demonstrated at room temperature and neutral pH. Polyd(m5C) at pH 8.0 exhibits fluorescence qualitatively the same as the mononucleotide: the quantum yield is independent of excitation energy; the emission maximum is at 2.92 ??1 (355 nm). Poly[d(I-m5C)] exhibits fluorescence resembling that of the 5-methyldeoxycytidine component with an additional feature that is probably due to weak deoxyinosine fluorescence. Neither of these synthetic DNA's exhibits spectra suggestive of exciplex formation.

James E. Gill

1971-01-01T23:59:59.000Z

236

Fluorescence spectrum analysis using Fourier series modeling for Fluorescein solution in Ethanol  

E-Print Network (OSTI)

We have measured the fluorescence spectrum for fluorescein solution in ethanol with concentration 1 {\\times} 10-3 mol/liter at different temperatures from room temperature to freezing point of solvent, (T = 153, 183, 223, 253, and 303 K) using liquid nitrogen. Table curve 2D version 5.01 program has been used to determine the fitting curve and fitting equation for each fluorescence spectrum. Fourier series (3 {\\times} 2) was the most suitable fitting equation for all spectra. Theoretical fluorescence spectrum of fluorescein in ethanol at T = 183K was calculated and compared with experimental fluorescence spectrum at the same temperature. There is a good similarity between them.

Hadi, Mahasin F

2011-01-01T23:59:59.000Z

237

Giant fluorescence enhancement of molecules coupled to plasmonic nanoscale patch antennas  

Science Journals Connector (OSTI)

We demonstrate a colloidally synthesized and tunable plasmonic platform for giant fluorescence enhancement and increased spontaneous emission rate of embedded fluorophores. A...

Mikkelsen, Maiken H; Rose, Alec; Hoang, Thang B; McGuire, Felicia; Mock, Jack J; Ciraci, Cristian; Smith, David R

238

Plastic lab-on-a-chip for fluorescence excitation with integrated organic semiconductor lasers  

Science Journals Connector (OSTI)

Laser light excitation of fluorescent markers offers highly sensitive and specific analysis for bio-medical or chemical analysis. To profit from these advantages for applications in...

Vannahme, Christoph; Klinkhammer, Sönke; Lemmer, Uli; Mappes, Timo

2011-01-01T23:59:59.000Z

239

Fluorescence from CsF ionic excimers excited by an electron beam  

SciTech Connect

Mixtures of rare gases and cesium fluoride vapors were excited by an intense relativistic electron beam. The fluorescence of the Cs[sup 2+]F[sup [minus

XYang, T.T.; Gylys, V.T.; Bower, R.D.; Harris, D.G. (Rocketdyne Division, Rockwell International, 6633 Canoga Avenue, Canoga Park, California 91303 (United States))

1992-08-01T23:59:59.000Z

240

Characterization of four potential laser-induced fluorescence tracers for diesel engine applications  

Science Journals Connector (OSTI)

Four potential laser-induced fluorescence (LIF) tracers, 1-phenyloctane, 1-phenyldecane, 1-methylnaphthalene, and 2-methylnaphthalene, are characterized for diesel engine applications....

Trost, Johannes; Zigan, Lars; Leipertz, Alfred; Sahoo, Dipankar; Miles, Paul C

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Nuclear Resonance Fluorescence to Measure Plutonium Mass in Spent Nuclear Fuel  

E-Print Network (OSTI)

and Nuclear Recoil . . . . . . . . . . . . . . . . . . . . .2 Quantitative Measurements using NRF 2.1 Nuclear ResonanceFuture Work A Transmission Nuclear Resonance Fluorescence

Ludewigt, Bernhard A

2011-01-01T23:59:59.000Z

242

Video-rate fluorescence diffuse optical tomography for in vivo sentinel lymph node imaging  

Science Journals Connector (OSTI)

We have developed a fiber-based, video-rate fluorescence diffuse optical tomography (DOT) system for noninvasive in vivo sentinel lymph node (SLN) mapping. Concurrent acquisition of...

Solomon, Metasebya; White, Brian R; Nothdruft, Ralph E; Akers, Walter; Sudlow, Gail; Eggebrecht, Adam T; Achilefu, Samuel; Culver, Joseph P

2011-01-01T23:59:59.000Z

243

High-frequency demodulation of multiphoton fluorescence in long-wavelength hyper-Rayleigh scattering  

Science Journals Connector (OSTI)

Suppression of the multiphoton fluorescence contribution to the hyper-Rayleigh (second-order nonlinear optical) scattering signal was recently achieved by intrinsic demodulation of...

Olbrechts, Geert; Wostyn, Kurt; Clays, Koen; Persoons, André

1999-01-01T23:59:59.000Z

244

Shelf life of five meat products displayed under light emitting diode or fluorescent lighting.  

E-Print Network (OSTI)

??Light emitting diode (LED) and fluorescent (FLS) lighting effects on enhanced pork loin chops, beef longissimus dorsi and semimembranosus steaks, ground beef, and ground turkey… (more)

Steele, Kyle Stover

2011-01-01T23:59:59.000Z

245

Detection of gas-phase HCl by the laser-induced sensitized fluorescence of CO2  

Science Journals Connector (OSTI)

A detection system for measuring HCl in the gas phase by monitoring sensitized fluorescence following intracavity excitation by a HCl chemical laser is described. It is possible to...

Fernando, Rohantha P

1986-01-01T23:59:59.000Z

246

E-Print Network 3.0 - amplified fluorescent transduction Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

2 PH.9 MICROSYSTEMS TECHNOLOGY LABORATORIES ANNUAL RESEARCH REPORT 2009 PHotonics Heterojunction Photoconductors for chemical Detection Summary: of a fluorescent polymer-chemical...

247

E-Print Network 3.0 - atomic fluorescence spectrometric Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

of Selenium by Fluorescence Spectrometry Summary: MATERIALS 129 5. Ihnat. M.. Atomic absorption spectrometric determination of selenium with carbon furnace... I...

248

Graphene Signal Amplification for Sensitive and Real-Time Fluorescence Anisotropy Detection of Small Molecules  

E-Print Network (OSTI)

Graphene Signal Amplification for Sensitive and Real-Time Fluorescence Anisotropy Detection graphene oxide (GO) as the signal amplifier. Because of the extraordinarily larger volume of GO

Tan, Weihong

249

Anatomy-Based Algorithms for Detecting Oral Cancer Using Reflectance and Fluorescence Spectroscopy  

E-Print Network (OSTI)

OBJECTIVES: We used reflectance and fluorescence spectroscopy to noninvasively and quantitatively distinguish benign from dysplastic/malignant oral lesions. We designed diagnostic algorithms to account for differences in ...

McGee, Sasha

250

Capillary electrophoresis-fluorescence line narrowing system (CE-FLNS) for on-line structural characterization  

DOE Patents (OSTI)

Capillary electrophoresis (CE) is interfaced with low temperature fluorescence line-narrowing (FLN) spectroscopy for on-line structural characterization of separated molecular analytes. 21 figs.

Jankowiak, R.J.; Small, G.J.; Shields, P.A.

1999-04-27T23:59:59.000Z

251

Molecular Fluorescence accompanying the Twilight Injection of Triethylborane into the Upper Atmosphere  

Science Journals Connector (OSTI)

... fluorescence spectrum, and at the same time to obtain data on the upper atmospheric \\vind from the motion of the released material.

J. M. HOFFMAN; M. A. PALMER; L. B. SMITH

1967-09-09T23:59:59.000Z

252

Cerenkov emission induced by external beam radiation stimulates molecular fluorescence  

SciTech Connect

Purpose: Cerenkov emission is induced when a charged particle moves faster than the speed of light in a given medium. Both x-ray photons and electrons produce optical Cerenkov photons in everyday radiation therapy of tissue; yet, this phenomenon has never been fully documented. This study quantifies the emissions and also demonstrates that the Cerenkov emission can excite a fluorophore, protoporphyrin IX (PpIX), embedded in biological phantoms. Methods: In this study, Cerenkov emission induced by radiation from a clinical linear accelerator is investigated. Biological mimicking phantoms were irradiated with x-ray photons, with energies of 6 or 18 MV, or electrons at energies 6, 9, 12, 15, or 18 MeV. The Cerenkov emission and the induced molecular fluorescence were detected by a camera or a spectrometer equipped with a fiber optic cable. Results: It is shown that both x-ray photons and electrons, at MeV energies, produce optical Cerenkov photons in tissue mimicking media. Furthermore, we demonstrate that the Cerenkov emission can excite a fluorophore, protoporphyrin IX (PpIX), embedded in biological phantoms. Conclusions: The results here indicate that molecular fluorescence monitoring during external beam radiotherapy is possible.

Axelsson, Johan; Davis, Scott C.; Gladstone, David J.; Pogue, Brian W. [Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755 (United States); Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire 03766 (United States); Thayer School of Engineering and Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755 (United States)

2011-07-15T23:59:59.000Z

253

Estimate of federal relighting potential and demand for efficient lighting products  

SciTech Connect

The increasing level of electric utility rebates for energy-efficient lighting retrofits has recently prompted concern over the adequacy of the market supply of energy-efficient lighting products (Energy User News 1991). In support of the U.S. Department of Energy`s Federal Energy Management Program, Pacific Northwest Laboratory (PNL) has developed an estimate of the total potential for energy-efficient lighting retrofits in federally owned buildings. This estimate can be used to address the issue of the impact of federal relighting projects on the supply of energy-efficient lighting products. The estimate was developed in 1992, using 1991 data. Any investments in energy-efficient lighting products that occurred in 1992 will reduce the potential estimated here. This analysis proceeds by estimating the existing stock of lighting fixtures in federally owned buildings. The lighting technology screening matrix is then used to determine the minimum life-cycle cost retrofit for each type of existing lighting fixture. Estimates of the existing stock are developed for (1) four types of fluorescent lighting fixtures (2-, 3-, and 4-lamp, F40 4-foot fixtures, and 2-lamp, F96 8-foot fixtures, all with standard magnetic ballasts); (2) one type of incandescent fixture (a 75-watt single bulb fixture); and (3) one type of exit sign (containing two 20-watt incandescent bulbs). Estimates of the existing stock of lighting fixtures in federally owned buildings, estimates of the total potential demand for energy-efficient lighting products if all cost-effective retrofits were undertaken immediately, and total potential annual energy savings (in MWh and dollars), the total investment required to obtain the energy savings and the present value of the efficiency investment, are presented.

Shankle, S.A.; Dirks, J.A.; Elliott, D.B.; Richman, E.E.; Grover, S.E.

1993-11-01T23:59:59.000Z

254

[16) Green Fluorescent Protein Chimeras to Probe Protein-Protein Interactions  

E-Print Network (OSTI)

[16) Green Fluorescent Protein Chimeras to Probe Protein-Protein Interactions By SANG-HYUN PARK and RONALD T. RAINES Introduction Green fluorescent protein (GFP) from the jellyfish Aequorea victoria. These properties include high thermal stability and resis- tance to detergents, organic solvents, and proteases

Raines, Ronald T.

255

Fluorescence diagnostics of oil pollution in coastal marine waters by use of artificial neural networks  

E-Print Network (OSTI)

marine waters with fluorescence spectroscopy and of using artificial neural networks for data interpre with an artificial neural network. The results demonstrate the possibility of estimating oil concentrationsFluorescence diagnostics of oil pollution in coastal marine waters by use of artificial neural

Oldenburg, Carl von Ossietzky Universität

256

The suppression of fluorescence peaks in energy-dispersive X-ray diffraction  

Science Journals Connector (OSTI)

It is shown experimentally that diffraction peaks which are normally obscured by fluorescence peaks in energy-dispersive X-ray diffraction can be revealed by tuning of the X-ray tube excitation voltage in order to suppress the fluorescence peaks.

Hansford, G.M.

2014-09-30T23:59:59.000Z

257

Matrix-Induced Intensity Fluctuations in the Fluorescence from Single Oligo(phenylenevinylene) Molecules  

E-Print Network (OSTI)

trajectories, spectral shape and position, and fluorescence lifetimes can be used to investigate the chemical and theoretical reports have demonstrated how a fluctuating dielectric nanoenvironment surrounding a polarizable factors on molecular conforma- tion.15,16 In all of these studies, the fluorescent probe molecule is used

Buratto, Steve

258

Far-Red Fluorescent Protein Excitable with Red Lasers for Flow Cytometry and Superresolution STED Nanoscopy  

E-Print Network (OSTI)

Far-Red Fluorescent Protein Excitable with Red Lasers for Flow Cytometry and Superresolution STED Biology, Yale University School of Medicine, New Haven, Connecticut ABSTRACT Far-red fluorescent proteins are required for deep-tissue and whole-animal imaging and multicolor labeling in the red wavelength range

Verkhusha, Vladislav V.

259

Red-emitting fluorescent Organic Light emitting Diodes with low sensitivity to self-quenching  

E-Print Network (OSTI)

Red-emitting fluorescent Organic Light emitting Diodes with low sensitivity to self-quenching S, France *E-mail : sebastien.forget@univ-paris13.fr Keywords: OLED, quenching, doping, red-emitting organic. We herein report on Organic Light-Emitting Diodes (OLEDs) based on a fluorescent amorphous red

Paris-Sud XI, Université de

260

Characterising nutrient-induced fluorescence transients (NIFTs) in nitrogen-stressed Chlorella emersonii (Chlorophyta)  

E-Print Network (OSTI)

Characterising nutrient-induced fluorescence transients (NIFTs) in nitrogen-stressed Chlorella nutrient- induced fluorescence transients (NIFTs) in nitrogen-stressed Chlorella emersonii (Chlorophyta-starvation in batch cultures of the freshwater chlorophyte Chlorella emersonii was followed and the NIFT responses

McCarthy, T.K.

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

428 BIOCHIMICAET BIOPHYSICAACTA pH CONTROL OF THE CHLOROPHYLL a FLUORESCENCE IN ALGAE  

E-Print Network (OSTI)

on the "slow" (min) time course of Chlorophyll a fluorescence yield in the green alga Chlorella pyrenoidosa and in the blue-green alga Anacystis nidulans. In Chlorella, the decay of fluorescence yield, in the I- to 5-rain transient (i.e. the P level) in suspensions of whole Chlorella cells, and influence in general, the kinetic

Govindjee

262

Structure-Dependent Fluorescence Efficiencies of Individual Single-Walled Carbon Nanotubes  

E-Print Network (OSTI)

1 Structure-Dependent Fluorescence Efficiencies of Individual Single-Walled Carbon Nanotubes Dmitri, F-33405 France AUTHOR EMAIL ADDRESS: weisman@rice.edu RECEIVED DATE #12;2 ABSTRACT: Single-nanotube fluorimetric intensities. KEYWORDS: SWNT, carbon nanotubes, fluorescence, microscopy, spectroscopy, emission

Boyer, Edmond

263

Nucleic acid encoding a self-assembling split-fluorescent protein system  

DOE Patents (OSTI)

The invention provides a protein labeling and detection system based on self-complementing fragments of fluorescent and chromophoric proteins. The system of the invention is exemplified with various combinations of self-complementing fragments derived from Aequorea victoria Green Fluorescent Protein (GFP), which are used to detect and quantify protein solubility in multiple assay formats, both in vitro and in vivo.

Waldo, Geoffrey S; Cabantous, Stephanie

2014-04-01T23:59:59.000Z

264

FLUORESCENCE CHANGES IN PORPHYRIDIUM EXPOSED TO GREEN LIGHT OF DIFFERENT INTENSITY: A NEW EMISSION  

E-Print Network (OSTI)

FLUORESCENCE CHANGES IN PORPHYRIDIUM EXPOSED TO GREEN LIGHT OF DIFFERENT INTENSITY: A NEW EMISSION supposed to require two light reactions for the transfer of one hydrogen atom from water to carbon dioxide the existence of this second trap. With increase in intensity of green light, I,, the differential fluorescence

Govindjee

265

Characterization of Pyoverdinpss, the Fluorescent Siderophore Produced by Pseudomonas syringae pv. syringae  

Science Journals Connector (OSTI)

...pyoverdinpss (peak V) was yellow-green and fluorescent when iron was...0~~~ 1.0 . j 0 20 40 60 lime (mlii) FIG. 4. Uptake of...Structure of the yellow-green fluorescent peptide produced...system using iron- containing minerals to limit iron repletion. J...

Yvonne S. Cody; Dennis C. Gross

1987-05-01T23:59:59.000Z

266

Directed evolution methods for improving polypeptide folding and solubility and superfolder fluorescent proteins generated thereby  

DOE Patents (OSTI)

The current invention provides methods of improving folding of polypeptides using a poorly folding domain as a component of a fusion protein comprising the poorly folding domain and a polypeptide of interest to be improved. The invention also provides novel green fluorescent proteins (GFPs) and red fluorescent proteins that have enhanced folding properties.

Waldo, Geoffrey S. (Santa Fe, NM)

2007-09-18T23:59:59.000Z

267

Nucleic acid encoding a self-assembling split-fluorescent protein system  

DOE Patents (OSTI)

The invention provides a protein labeling and detection system based on self-complementing fragments of fluorescent and chromophoric proteins. The system of the invention is exemplified with various combinations of self-complementing fragments derived from Aequorea victoria Green Fluorescent Protein (GFP), which are used to detect and quantify protein solubility in multiple assay formats, both in vitro and in vivo.

Waldo, Geoffrey S. (Santa Fe, NM); Cabantous, Stephanie (Los Alamos, NM)

2011-06-07T23:59:59.000Z

268

Sensors and Actuators B 111112 (2005) 230241 Improvements in LED-based fluorescence analysis systems  

E-Print Network (OSTI)

Sensors and Actuators B 111­112 (2005) 230­241 Improvements in LED-based fluorescence analysis the stability, power output, and spectral flexibility of light emitting diode (LED)-based systems used to excite fluorescence or other forms of luminescence. LEDs are an attractive alternative to conventional white

Wilson, Denise

269

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources for  

E-Print Network (OSTI)

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources) microchannel waveguides with liquid cores containing fluorescent dyes, excited by incident light from an external halogen bulb. Simultaneous use of multiple fluorophores in a common solution, in a single L2 light

Prentiss, Mara

270

Theoretical study of single molecule fluorescence in a metallic nanocavity Jorg Enderleina)  

E-Print Network (OSTI)

Theoretical study of single molecule fluorescence in a metallic nanocavity Jo¨rg Enderleina the metal. For the sake of sim- plicity, a single dye molecule centered within a dielectric bead coated on the fluorescence excitation and emission of a molecule embedded within a nanometric metal-coated dielectric bead

Enderlein, Jörg

271

Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna  

E-Print Network (OSTI)

Large single-molecule fluorescence enhancements produced by a bowtie nanoantenna Anika Kinkhabwala1 mismatch between light and nanoscale objects such as single molecules, it is important to be able-contrast selection of single nanoemitters. A single fluorescent molecule (SM) with transition dipole m acts

Fan, Shanhui

272

High-throughput single-molecule fluorescence spectroscopy using parallel detection  

E-Print Network (OSTI)

High-throughput single-molecule fluorescence spectroscopy using parallel detection X. Michalet Solution-based single-molecule fluorescence spectroscopy is a powerful new experimental approach in rare burst-like events corresponding to the transit of a single-molecule. Those events are accumulated

Michalet, Xavier

273

arXiv:astro-ph/0510375v112Oct2005 Comparison of air fluorescence and ionization  

E-Print Network (OSTI)

is maintained similar in shape in all showers, independent of initial energy, aside from the relatively sparsely, Salt Lake City, UT 84112, U.S.A. P. Chen, C. Field , C. Hast, R. Iverson, J.S.T. Ng, A. Odian, K. Reil fluorescence profiles in measuring ultra high energy cosmic rays. Key words: air fluorescence, electromagnetic

274

Near-Infrared Fluorescent pH-Sensitive Probes via Unexpected Barbituric Acid  

E-Print Network (OSTI)

Near-Infrared Fluorescent pH-Sensitive Probes via Unexpected Barbituric Acid Mediated Synthesis achilefus@mir.wustl.edu Received October 13, 2008 ABSTRACT Novel near-infrared pyrimidine-fused p by 2D-NMR. All new compounds are highly fluorescent in the near-infrared region and possess excellent

Larson-Prior, Linda

275

Targeting Beta-3 Integrin Using a Linear Hexapeptide Labeled with a Near-Infrared Fluorescent Molecular  

E-Print Network (OSTI)

Targeting Beta-3 Integrin Using a Linear Hexapeptide Labeled with a Near-Infrared Fluorescent-peptides labeled with a near-infrared fluorescent probe (cypate) showed that rearranging the glycine in a linear, and physiopathologic processes mediated by this protein. Keywords: Integrin; cancer; near-infrared; imaging; molecular

Larson-Prior, Linda

276

Performance dependence of hybrid x-ray computed tomography/fluorescence molecular  

E-Print Network (OSTI)

Performance dependence of hybrid x-ray computed tomography/fluorescence molecular tomography imaging systems combining x-ray computed tomography (CT) and fluorescence tomography can im- prove Ntziachristos2 1 Department of Electrical and Computer Engineering, Northeastern University, 360 Huntington Ave

Miller, Eric

277

Optical fiber-based fluorescent viscosity sensor Mark A. Haidekker and Walter J. Akers  

E-Print Network (OSTI)

Optical fiber-based fluorescent viscosity sensor Mark A. Haidekker and Walter J. Akers Department bound to a fiber-optic tip without loss of viscosity sensi- tivity. The optical fiber itself may be used to molecular rotors in solution. An optical fiber-based fluorescent vis- cosity sensor may be used in real

Theodorakis, Emmanuel

278

X-ray Fluorescence Measurements of Manganese in Petroglyphs and Graffiti in the Bluff, Utah Area  

E-Print Network (OSTI)

X-ray Fluorescence Measurements of Manganese in Petroglyphs and Graffiti in the Bluff, Utah Area the age of rock art using Mn levels, Lytle (2008). In this work we use x-ray fluorescence (XRF) to measure of methods including atomic mass spectroscopy (AMS) measurements of 14 C, Particle-induced X-ray Excitation

279

Fluorescent Functionalized Mesoporous Silica for Radioactive Material Extraction  

SciTech Connect

Mesoporous silica with covalently bound salicylic acid molecules incorporated in the structure was synthesized with a one-pot, co-condensation reaction at room temperature. The as-synthesized material has a large surface area, uniform particle size, and an ordered pore structure as determined by characterization with transmission electron microscopy, thermal gravimetric analysis, and infrared spectra, etc. Using the strong fluorescence and metal coordination capability of salicylic acid, functionalized mesoporous silica (FMS) was developed to track and extract radionuclide contaminants, such as uranyl [U(VI)] ions encountered in subsurface environments. Adsorption measurements showed a strong affinity of the FMS toward U(VI) with a Kd value of 105 mL/g, which is four orders of magnitude higher than the adsorption of U(VI) onto most of the sediments in natural environments. The new materials have a potential for synergistic environmental monitoring and remediation of the radionuclide U(VI) from contaminated subsurface environments.

Li, Juan; Zhu, Kake; Shang, Jianying; Wang, Donghai; Nie, Zimin; Guo, Ruisong; Liu, Chongxuan; Wang, Zheming; Li, Xiaolin; Liu, Jun

2012-08-01T23:59:59.000Z

280

Doppler-free Yb spectroscopy with the fluorescence spot technique  

SciTech Connect

We demonstrate a simple technique to measure the resonant frequency of the 398.9-nm {sup 1}S{sub 0}{leftrightarrow}{sup 1}P{sub 1} transition for the different Yb isotopes. The technique, which works by observing and aligning fluorescence spots, has enabled us to measure transition frequencies and isotope shifts with an accuracy of 60 MHz. We provide wavelength measurements for the transition that differ from previously published work. Our technique also allows for the determination of Doppler-shifted transition frequencies for photoionization experiments when the atomic beam and the laser beam are not perpendicular and furthermore allows us to determine the average velocity of the atoms along the direction of the atomic beam.

Nizamani, Altaf H.; McLoughlin, James J.; Hensinger, Winfried K. [Department of Physics and Astronomy, University of Sussex, Falmer, Brighton, East-Sussex, BN1 9QH (United Kingdom)

2010-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Hand-held X-Ray Fluorescence (XRF) | Open Energy Information  

Open Energy Info (EERE)

Hand-held X-Ray Fluorescence (XRF) Hand-held X-Ray Fluorescence (XRF) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Hand-held X-Ray Fluorescence (XRF) Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Data Collection and Mapping Parent Exploration Technique: Data Collection and Mapping Information Provided by Technique Lithology: Bulk and trace element analysis of rocks, minerals, and sediments. Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Hand-held X-Ray Fluorescence (XRF): Hand-held X-Ray Fluorescence is a portable analytical technique derived from the instrumentation used in traditional lab-based XRF analysis. The technique is used for bulk chemical analysis of rock, mineral, and sediment

282

Electrochemically Controlled Surface Plasmon Enhanced Fluorescence Response of Surface Immobilized CdZnSe Quantum Dots  

Science Journals Connector (OSTI)

The application of negative potentials (versus Ag/AgCl) led to a decrease in the surface plasmon enhanced fluorescence signal, the fluorescence signal recovered if the cell potential was returned to 0 V or open circuit. ... UV?vis spectroscopy was carried out on a Perkin-Elmer Lambda 9 UV/vis/NIR spectrophotometer and fluorescence spectroscopy on a J&M TIDAS fluorescence spectrometer with illumination from a 100 W xenon bulb. ... In the research described in this paper, we show that such electrode potential control of QD fluorescence can also be achieved in an aqueous environment by close control of coupling conditions and QD chemistry leading to the possibility of using such structures for enhanced detection of biological and biorelated molecules. ...

Petra J. Cameron; Xinhua Zhong; Wolfgang Knoll

2009-03-23T23:59:59.000Z

283

DOE Withdraws the Energy Star Label from 34 Compact Fluorescent Light Bulbs  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the Energy Star Label from 34 Compact Fluorescent the Energy Star Label from 34 Compact Fluorescent Light Bulbs DOE Withdraws the Energy Star Label from 34 Compact Fluorescent Light Bulbs January 26, 2010 - 11:41am Addthis Washington, DC - On January 25th, the General Counsel notified 25 manufacturers that the Department of Energy has withdrawn their right to use the Energy Star label on 34 different models of compact fluorescent light bulbs (CFLs). The Department took this action after its off-the-shelf testing revealed that the affected models do not last as long in regular use as Energy Star certification would require. As a result, these manufacturers have been informed that they can no longer ship or sell any of the 34 models of CFLs bearing the Energy Star label on the bulb or its packaging. All compact fluorescent light bulbs use about 75 percent less energy and

284

An endogenous green fluorescent protein–photoprotein pair in Clytia hemisphaerica eggs shows co-targeting to mitochondria and efficient bioluminescence energy transfer  

Science Journals Connector (OSTI)

...compartmentalization. green fluorescent protein...bioluminescence resonance energy transfer|clytin...chemiluminescence-resonance-energy-transfer chimaeras between green fluorescent protein...Cormier. 1979 An energy transfer protein...of the Renilla green-fluorescent protein...

2014-01-01T23:59:59.000Z

285

Dual-Emission Fluorescence Resonance Energy Transfer (FRET) Real-Time PCR Differentiates Feline Immunodeficiency Virus Subtypes and Discriminates Infected from Vaccinated Cats  

Science Journals Connector (OSTI)

...fluorescence resonance energy transfer (FRET...indicator of infection status in vaccinated cats...fluorescence resonance energy transfer (FRET...view/xhtml/en_us/smallanimal/inhouse...fluorescence resonance energy transfer (FRET...indicator of infection status. After the introduction...

Chengming Wang; Calvin M. Johnson; Sudhir K. Ahluwalia; Erfan Chowdhury; Yihang Li; Dongya Gao; Anil Poudel; K. Shamsur Rahman; Bernhard Kaltenboeck

2010-03-24T23:59:59.000Z

286

Microsoft Word - FOR WEB - Universal 26004 NND based on GE 4901, 2609 v3.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

BEFORE THE BEFORE THE U.S. DEPARTMENT OF ENERGY Washington, D.C. 20585 In the Matter of: Universal Lighting Technologies, Inc. (fluorescent lamp ballasts) ) ) ) ) ) Case Number: 2013-SE-26004 Issued: September 6, 2013 NOTICE OF NONCOMPLIANCE DETERMINATION Fluorescent lamp ballasts are covered products subject to federal energy conservation standards as described in 42 U.S.C. §§ 6292(a)(13), 6295(g) and 10 C.F.R. § 430.32(m). Specifically, fluorescent lamp ballasts designed for use in connection with one F40T12 lamp and sold by the manufacturer on or after July 1, 2005, are subject to a minimum ballast efficacy factor of 2.29 and a minimum power factor of 0.90. 42 U.S.C. § 6295(g)(8) and 10 C.F.R. § 430.32(m). Manufacturers and private labelers are prohibited from distributing covered products that do not

287

Application of a ratiometric laser induced fluorescence (LIF) thermometry for micro-scale temperature measurement for natural convection flows  

E-Print Network (OSTI)

A ratiometric laser induced fluorescence (LIF) thermometry applied to micro-scale temperature measurement for natural convection flows. To eliminate incident light non-uniformity and imperfection of recording device, two fluorescence dyes are used...

Lee, Heon Ju

2004-11-15T23:59:59.000Z

288

Single particle size and fluorescence spectra from emissions of burning materials in a tube furnace to simulate burn pits  

Science Journals Connector (OSTI)

A single-particle fluorescence spectrometer (SPFS) and an aerodynamic particle sizer were used to measure the fluorescence spectra and particle size distribution from the particulate emissions of 12 different burning

Yong-Le Pan; Joshua D. T. Houck; Pamela A. Clark; Ronald G. Pinnick

2013-08-01T23:59:59.000Z

289

The evaluation of ERK1 dimerization models using fluorescence correlation Ssectroscopy and the development of analysis algorithms for single-molecule super resolution.  

E-Print Network (OSTI)

??In this dissertation, we describe three advancements in the area of fluorescence spectroscopy and microscopy. First, we have implemented Fluorescence Correlation Spectroscopy on a home-built… (more)

Huang, Fang, 1982-

2012-01-01T23:59:59.000Z

290

In Vivo Self-Assembly of Stable Green Fluorescent Protein Fusion Particles and Their Uses in Enzyme Immobilization  

Science Journals Connector (OSTI)

...Engineering In Vivo Self-Assembly of Stable Green Fluorescent Protein Fusion Particles and...previously the in vivo self-assembly of green fluorescent protein (GFP) fusions into...the design and recombinant production of green fluorescent protein (GFP) particles were...

Mark Venning-Slater; David O. Hooks; Bernd H. A. Rehm

2014-03-07T23:59:59.000Z

291

Comment on ``Resonance-fluorescence and absorption spectra of a two-level atom driven by a strong bichromatic field''  

E-Print Network (OSTI)

Comment on ``Resonance-fluorescence and absorption spectra of a two-level atom driven by a strong predictions of the resonance fluorescence from a two-level atom driven by a strong bichromatic field J. Opt.50.Hz, 33.50.Dq, 32.80. t In studying the resonance fluorescence from a driven two- level atom, we

Boyd, Robert W.

292

Denoising fluorescence endoscopy: a motion compensated temporal recursive video filter with an optimal minimum mean square error parameterization  

Science Journals Connector (OSTI)

Fluorescence endoscopy is an emerging technique for the detection of bladder cancer. A marker substance is brought into the patient's bladder which accumulates at cancer tissue. If a suitable narrow band light source is used for illumination, a red fluorescence ... Keywords: bladder, endoscopy, fluorescence, noise filtering, optimal filter, photo dynamic diagnostics

Thomas Stehle; Jonas Wulff; Alexander Behrens; Sebastian Gross; Til Aach

2009-06-01T23:59:59.000Z

293

Measurements of the Ultraviolet Fluorescence Cross Sections and Spectra of Bacillus Anthracis Simulants  

SciTech Connect

Measurements of the ultraviolet autofluorescence spectra and absolute cross sections of the Bacillus anthracis (Ba) simulants Bacillus globigii (Bg), Bacillus megaterium (Bm), Bacillus subtilis (Bs), and Bacillus cereus (Bc) were measured. Fluorescence spectra and cross sections of pine pollen (Pina echinata) were measured for comparison. Both dried vegetative cells and spores separated from the sporulated vegetative material were studied. The spectra were obtained by suspending a small number (<10) of particles in air in our Single Particle Spectroscopy Apparatus (SPSA), illuminating the particles with light from a spectrally filtered arc lamp, and measuring the fluorescence spectra of the particles. The illumination was 280 nm (20 nm FWHM) and the fluorescence spectra was measured between 300 and 450 nm. The fluorescence cross section of vegetative Bg peaks at 320 nm with a maximum cross section of 5 X 10{sup -14} cm{sup 2}/sr-nm-particle while the Bg spore fluorescence peaks at 310 nm with peak fluorescence of 8 X 10{sup -15} cm{sup 2}/sr-nm-particle. Pine pollen particles showed a higher fluorescence peaking at 355 nm with a cross section of 1.7 X 10{sup -13} cm{sup 2}/sr-nm-particle. Integrated cross sections ranged from 3.0 X 10{sup -13} for the Bg spores through 2.25 X 10{sup -12} (cm{sup 2}/sr-particle) for the vegetative cells.

Stephens, J.R.

1998-09-01T23:59:59.000Z

294

Lighting Group: Sources and Ballasts: LED Reflector Lamp  

NLE Websites -- All DOE Office Websites (Extended Search)

LED Reflector Lamp LED Reflector Lamp LED Reflector Lamp Objective LED reflector lamp The goal of this project is to develop a revolutionary new reflector lamp which offers many advantages over current incandescent reflector lamps, including: three times greater efficiency ten times the rated life greater optical and performance properties use of light emitting diodes (LEDs) to generate the light. Although LEDs have been commercially available since the late 1960Â’s, recent dramatic improvements in LED technology have led to white light devices with efficiencies that meet or exceed those of a standard incandescent lamp. This project will build upon these improvements to develop a new type of source for focusing light. Contact Information For more information on this project, please contact:

295

Feature scaling of large, ballasted, field emission arrays  

E-Print Network (OSTI)

Field emitters are an exciting technology for high-frequency, high-power applications because of their excellent free space electron transport, and their potential for high current density and high current, especially when ...

Guerrera, Stephen A. (Stephen Angelo)

2011-01-01T23:59:59.000Z

296

Cell-Trappable Fluorescent Probes for Nitric Oxide Visualization in Living Cells  

Science Journals Connector (OSTI)

(2) More recently, NO has been implicated to modulate synaptic activity in the CNS, where it may play a role in signal transduction in the olfactory bulb. ... Using the copper stoichiometry determined by titration, exposure of solutions of the probes generated in situ to excess NO under anaerobic conditions led to an immediate fluorescence enhancement with a concomitant bathochromic shift of the emission maxima (Figure 2 and Table 1). ... To test this presumption, fluorescent protein chimeras were expressed in RAW 264.7 macrophages, and time-lapse ratiometric fluorescence microscopy was used to measure the maturation dynamics of individual phagosomes contg. ...

Michael D. Pluth; Lindsey E. McQuade; Stephen J. Lippard

2010-04-20T23:59:59.000Z

297

High sensitivity fluorescent single particle and single molecule detection apparatus and method  

DOE Patents (OSTI)

Apparatus is described for ultrasensitive detection of single fluorescent particles down to the single fluorescent molecule limit in a fluid or on a substrate comprising means for illuminating a predetermined volume of the fluid or area of the substrate whereby to emit light including background light from the fluid and burst of photons from particles residing in the area. The photon burst is detected in real time to generate output representative signal. The signal is received and the burst of energy from the fluorescent particles is distinguished from the background energy to provide an indication of the number, location or concentration of the particles or molecules.

Mathies, Richard A. (Contra Costa County, CA); Peck, Konan (Contra Costa County, CA); Stryer, Lubert (Santa Clara County, CA)

1990-01-01T23:59:59.000Z

298

Nuclear Resonance Fluorescence for Material Verification in Dismantlement  

SciTech Connect

Nuclear resonance fluorescence (NRF) is a well-established physical process that provides an isotope-specific signature that can be exploited for isotopic detection and characterization of samples. Pacific Northwest National Laboratory has been investigating possible applications of NRF for national security. Of the investigated applications, the verification of material in the dismantlement process is the most promising. Through a combination of benchmarking measurements and radiation transport modeling, we have shown that NRF techniques with existing bremsstrahlung photon sources and a modest detection system can be used to detect highly enriched uranium in the quantities and time limits relevant to the dismantlement process. Issues such as orientation, placement and material geometry do not significantly impact the sensitivity of the technique. We have also investigated how shielding of the uranium would be observed through non-NRF processes to enable the accurate assay of the material. This paper will discuss our findings on how NRF and photon-interrogation techniques may be applied to the material verification in the dismantlement process.

Warren, Glen A.; Detwiler, Rebecca S.

2011-10-01T23:59:59.000Z

299

Fluorescence from a quantum dot and metallic nanosphere hybrid system  

SciTech Connect

We present energy absorption and interference in a quantum dot-metallic nanosphere system embedded on a dielectric substrate. A control field is applied to induce dipole moments in the nanosphere and the quantum dot, and a probe field is applied to monitor absorption. Dipole moments in the quantum dot or the metal nanosphere are induced, both by the external fields and by each other's dipole fields. Thus, in addition to direct polarization, the metal nanosphere and the quantum dot will sense one another via the dipole-dipole interaction. The density matrix method was used to show that the absorption spectrum can be split from one peak to two peaks by the control field, and this can also be done by placing the metal sphere close to the quantum dot. When the two are extremely close together, a self-interaction in the quantum dot produces an asymmetry in the absorption peaks. In addition, the fluorescence efficiency can be quenched by the addition of a metal nanosphere. This hybrid system could be used to create ultra-fast switching and sensing nanodevices.

Schindel, Daniel G. [Department of Mathematics and Statistics, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9 (Canada); Singh, Mahi R. [Department of Physics and Astronomy, University of Western Ontario, 1151 Richmond Street, London, ON, N6A 3K7 (Canada)

2014-03-31T23:59:59.000Z

300

Nuclear Resonance Fluorescence at MIT | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Resonance Fluorescence at MIT Resonance Fluorescence at MIT Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP Spinoff Applications Spinoff Archives SBIR/STTR Applications of Nuclear Science and Technology Funding Opportunities Nuclear Science Advisory Committee (NSAC) News & Resources Contact Information Nuclear Physics U.S. Department of Energy SC-26/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3613 F: (301) 903-3833 E: sc.np@science.doe.gov More Information » Spinoff Archives Nuclear Resonance Fluorescence at MIT Print Text Size: A A A RSS Feeds FeedbackShare Page Application/instrumentation: Material Identification and Object Imaging Using Nuclear Resonance Fluorescence Developed at: Massachusetts Institute of Technology

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Efficiency and concentration ratio measurements of fluorescent solar concentrators using a xenon measurement system  

Science Journals Connector (OSTI)

An indoor test stand for fluorescent planar concentrator–collectors (FPC) with a 1.6-kW xenon light source, irradiating a rectangular triangle (active area 400 cm2) with 82...

Heidler, K

1981-01-01T23:59:59.000Z

302

Application of Computers in Electron Probe and X-Ray Fluorescence Analysis  

Science Journals Connector (OSTI)

This paper is a review of automation of electron microprobe and x-ray fluorescence instrumentation. Such a review seems timely because of the great increase in the application of computer systems in this field...

Stanley D. Rasberry

1972-01-01T23:59:59.000Z

303

Frost Resistance of Wheat and CHL a in vivo Fluorescence Induction Kinetics  

Science Journals Connector (OSTI)

In recent years more and more studies have shown that physiological status of a living plant under different environmental conditions can be revealed by signals of chlorophyll a in vivo fluorescence induction ...

Shiqing Lin; Dianan Yang; Jide Zhang; Tongzhu Li…

1990-01-01T23:59:59.000Z

304

Two-photon nitric oxide laser-induced fluorescence measurements in a diesel engine  

Science Journals Connector (OSTI)

A two-photon nitric oxide (NO) laser-induced fluorescence (LIF) technique was developed and applied to study in-cylinder diesel combustion. The technique prevents many problems...

Martin, Glen C; Mueller, Charles J; Lee, Chia-Fon F

2006-01-01T23:59:59.000Z

305

Detection of Thiobacillus ferrooxidans in acid mine environments by indirect fluorescent antibody staining.  

Science Journals Connector (OSTI)

...Industrial Waste | Coal Mining Epitopes Fluorescent...materials associated with coal. J. Bacteriol. 117...Effects of surface mining on fish and wildlife in Appalachia. Report, U.S...plasma acidophilum in coal refuse material. Appl...

W A Apel; P R Dugan; J A Filppi; M S Rheins

1976-07-01T23:59:59.000Z

306

Fluorescence of curium(III) in solutions of isopoly- and heteropolytungstates  

SciTech Connect

The authors describe the fluorescence of polytungstate complexes of curium (the term polytungstate complexes connotes both curium decatungstate and curium complexes with heteropolytungstate anions). The emitter is the curium(III) ion, which is excited as a result of energy transfer with the ligand. The data obtained permit a supplementation of the picture of the mutual interaction of the spectral and chemical properties of the f-elements with their ability to fluoresce in polytungstate complexes (there is only individual information on this question, pertaining only to the fluorescence of the lanthanides, chiefly Eu, Tb, Sm, and Dy). The fluorescence of curium(III) has also been used as a method of studying its complex formation with heteropolytungstate anions.

Yusov, A.B.; Fedoseev, A.M.; Spitsyn, V.I.; Krot, N.N.

1986-11-01T23:59:59.000Z

307

Turn-on fluorescent probes for detecting nitric oxide in biology  

E-Print Network (OSTI)

Chapter 1. Investigating the Biological Roles of Nitric Oxide and Other Reactive Nitrogen Species Using Fluorescent Probes: This chapter presents an overview of recent progress in the field of reactive nitrogen species ...

McQuade, Lindsey Elizabeth, 1981-

2010-01-01T23:59:59.000Z

308

Microcavity effects on the generation, fluorescence, and diffusion of excitons in organic solar cells  

Science Journals Connector (OSTI)

We compute the short-circuit diffusion current of excitons in an organic solar cell, with special emphasis on fluorescence losses. The exciton diffusion length is not uniform but...

Kozyreff, G; Urbanek, D C; Vuong, L T; Silleras, O Nieto; Martorell, J

2013-01-01T23:59:59.000Z

309

Optimization of Two-photon Excited Fluorescence Enhancement between Tunable and Broadband Femtosecond Laser Pulse Excitations  

E-Print Network (OSTI)

This project explores optimization of two-photon excited fluorescence (TPEF) enhancement between tunable narrowband and un-tuned broadband femtosecond (fs) laser pulse excitations for two-photon microscopy (TPM). The research is conducted...

Wang, Chao

2012-02-14T23:59:59.000Z

310

Development of a radiative transport based, fluorescence-enhanced, frequency-domain small animal imaging system  

E-Print Network (OSTI)

% intralipid solutions. Through collaboration with Transpire, Inc., a fluorescence-enhanced, frequency-domain, radiative transport equation (RTE) solver was developed. This solver incorporates the discrete ordinates, source iteration with diffusion synthetic...

Rasmussen, John C.

2009-05-15T23:59:59.000Z

311

Assessment of LED fluorescence microscopy for the diagnosis of Plasmodium falciparum infections in Gabon  

Science Journals Connector (OSTI)

LedFM and conventional fluorescence microscopy (uvFM) were compared to LM in 210 samples from patients with history of fever in the last 24 hours admitted to the Albert Schweitzer Hospital in Lambaréné, Gabon.

Dominic Lenz; Peter G Kremsner; Bertrand Lell; Barbara Biallas…

2011-07-01T23:59:59.000Z

312

In vivo biosensing via tissue-localizable near-infrared-fluorescent single-walled carbon nanotubes  

E-Print Network (OSTI)

Single-walled carbon nanotubes are particularly attractive for biomedical applications, because they exhibit a fluorescent signal in a spectral region where there is minimal interference from biological media. Although ...

Iverson, Nicole M.

313

Development of nanoparticle sizing system integrated with optical microscopy using fluorescence polarisation  

Science Journals Connector (OSTI)

There is a strong demand for the development of functional nanostructured devices. On the basis of fundamental chemistry, the fields of biotechnology and materials science have developed over the past three decades into powerful disciplines that allow the engineering of advanced technical devices. The functions of nanostructures are greatly influenced by their size and shape. In order to enable precise fabrication of nanostructured devices by bottom-up methods, real-time control based on in situ evaluation of nanoparticle growth and aggregation is needed. The fluorescence polarisation technique allows estimation of the size of a macromolecular structure from rotational diffusion constants, which can be obtained from the correlation of polarisation in fluorescence from fluorophores attached to the macromolecular structure. By analysing the degree of fluorescence polarisation, the theoretical size can be calculated by the Perrin-Weber formula. In this study, we investigated the degree of fluorescence polarisation dependency on different sizes of fluorescein-labelled nanoparticles.

Terutake Hayashi; Yasuhiro Takaya; Masaki Michihata

2012-01-01T23:59:59.000Z

314

On the origin of a slowly reversible fluorescence decay component in the Arabidopsis npq4 mutant  

Science Journals Connector (OSTI)

...regulation of photosynthetic energy conversion. Plant Cell 10, 1121-1134...photon absorption, excess energy dissipation and zeaxanthin...fluorescence. In Light as an energy source and information carrier in plant physiology (ed...

2014-01-01T23:59:59.000Z

315

AUTOMATED DETERMINATION OF PROTEIN SUBCELLULAR LOCATIONS FROM 3D FLUORESCENCE MICROSCOPE IMAGES  

E-Print Network (OSTI)

features (termed SLF for Subcellular Location Features) computed from 2D fluorescence microscope images [4]. We have shown the SLF to accurately represent the complexity in such images by using them

Gordon, Geoffrey J.

316

Cell-Trappable Fluorescent Probes for Nitric Oxide Visualization in Living Cells  

E-Print Network (OSTI)

Two new cell-trappable fluorescent probes for nitric oxide (NO) are reported based on either incorporation of hydrolyzable esters or conjugation to aminodextran polymers. Both probes are highly selective for NO over other ...

Pluth, Michael D.

317

E-Print Network 3.0 - anomalous x-ray fluorescence Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

in the emission of a fluorescent X-ray. As a rule of thumb 15... Optimization of X-ray energy resolution from a horizontally focused ... Source: Hendrickson, Wayne A. -...

318

Design of a New Fluorescent Cofactor for DNA Methyltransferases and Sequence-Specific Labeling of DNA  

Science Journals Connector (OSTI)

Sequence-specific labeling of DNA is of immense interest for analytical and functional studies of DNA. We present a novel approach for sequence-specific labeling of DNA using a newly designed fluorescent cofactor for the DNA methyltransferase from ...

Goran Pljevaljcic; Marc Pignot; Elmar Weinhold

2003-02-26T23:59:59.000Z

319

Toward whole-body optical imaging of rats using single-photon counting fluorescence tomography  

Science Journals Connector (OSTI)

We used single-photon counting (SPC) detection for diffuse fluorescence tomography to image nanomolar (nM) concentrations of reporter dyes through a rat. Detailed phantom data are...

Leblond, Frederic; Tichauer, Kenneth M; Holt, Robert W; El-Ghussein, Fadi; Pogue, Brian W

2011-01-01T23:59:59.000Z

320

Peptide Secondary Structure Modulates Single-Walled Carbon Nanotube Fluorescence as a Chaperone Sensor for Nitroaromatics  

E-Print Network (OSTI)

A class of peptides from the bombolitin family, not previously identified for nitroaromatic recognition, allows near-infrared fluorescent single-walled carbon nanotubes to transduce specific changes in their conformation. ...

Heller, Daniel Alan

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Impact of Varying Atmospheric Profiles on Extensive Air Shower Observation: Fluorescence Light Emission and Energy Reconstruction  

E-Print Network (OSTI)

Several experiments measure the fluorescence light produced by extensive air showers in the atmosphere. This light is converted into a longitudinal shower profile from which information on the primary energy and composition is derived. The fluorescence yield, as the conversion factor between light profile measured by EAS experiments and physical interpretation of showers, has been measured in several laboratory experiments. The results, however, differ considerably. In this article, a model calculation of the fluorescence emission from relevant band systems of nitrogen in dependence on wavelength and atmospheric conditions is presented. Different calculations are compared to each other in combination with varying input parameters. The predictions are compared with measurements and the altitude-dependence of the fluorescence yield is discussed in detail.

B. Keilhauer; J. Bluemer; R. Engel; H. O. Klages

2005-11-05T23:59:59.000Z

322

Experimental study on the fluorescence lifetime of ethanol-water mixtures  

Science Journals Connector (OSTI)

The ethanol-water mixtures can emit fluorescence when excited by the ultraviolet (UV) light, which is different from pure ethanol and water. There are three emission bands of the...

Liu, Ying; Li, Rongqing; Lan, Xiufeng; Shen, Zhonghua; Lu, Jian; Ni, Xiaowu

2005-01-01T23:59:59.000Z

323

Fluorescent Dye Encapsulated ZnO Particles with Cell-specific...  

NLE Websites -- All DOE Office Websites (Extended Search)

Dye Encapsulated ZnO Particles with Cell-specific Toxicity for Potential use in Biomedical Applications. Fluorescent Dye Encapsulated ZnO Particles with Cell-specific Toxicity...

324

BIOCHIMICA ET BIOPHYSICA ACTA 371 FLUORESCENCE SPECTRA OF CHLORELLA IN THE 295-77K RANGE*  

E-Print Network (OSTI)

BIOCHIMICA ET BIOPHYSICA ACTA 371 BBA45950 FLUORESCENCE SPECTRA OF CHLORELLA IN THE 295-77°K RANGE A relation of fluorescence spectra of Chlorella (in the 295-77°K range) to the changes in the phase in the 77-295°K range, is composed of several bands (F7I7 and F725). If Chlorella cells are first cooled

Govindjee

325

Laser induced coal fluorescence. Ninth quarterly technical progress report, October 1-December 31, 1984. [Alginite  

SciTech Connect

The work during this reporting period has included a systematic fluorescence analysis of thirteen New Albany Shale samples of the Illinois basin. Fluorescence spectra obtained by continuous wave (c-w) excitation of 45 alginite macerals were collected for each shale sample. This work is now being continued by collecting the time-resolved data, and preliminary results are reported here. Additional software has been written to simplify the acquisition and manipulation of the time-resolved data. 9 figures, 4 tables.

Borst, W.L.

1984-01-01T23:59:59.000Z

326

Fluorescent Nanohybrids Based on Quantum Dot–Chitosan–Antibody as Potential Cancer Biomarkers  

Science Journals Connector (OSTI)

Photoluminescence (PL) characterization of the CdS/polysaccharides conjugates and intermediates systems was performed based on spectra acquired using the Nanodrop 3300 fluorospectrometer (Thermo Scientific, blue LED with ?excitation = 470 ± 10 nm). ... All photoluminescence spectra were collected at room temperature, and measurements of fluorescence intensities were reported in relative fluorescent units (RFU). ... Additionally, QD colloidal media were placed inside a “darkroom chamber” where they were illuminated by a UV radiation emission bulb (?excitation = 254 and 365 nm, 6 W, Boitton Instruments). ...

Alexandra A. P. Mansur; Herman S. Mansur; Amanda Soriano-Araújo; Zélia I. P. Lobato

2014-06-23T23:59:59.000Z

327

Organic light-emitting device with a phosphor-sensitized fluorescent emission layer  

DOE Patents (OSTI)

The present invention relates to organic light emitting devices (OLEDs), and more specifically to OLEDS that emit light using a combination of fluorescent emitters and phosphorescent emitters. The emissive region of the devices of the present invention comprise at least one phosphor-sensitized layer which has a combined emission from a phosphorescent emitter and a fluorescent emitter. In preferred embodiments, the invention relates to white-emitting OLEDS (WOLEDs).

Forrest, Stephen (Ann Arbor, MI); Kanno, Hiroshi (Osaka, JP)

2009-08-25T23:59:59.000Z

328

Flow method and apparatus for screening chemicals using micro x-ray fluorescence  

DOE Patents (OSTI)

Method and apparatus for screening chemicals using micro x-ray fluorescence. A method for screening a mixture of potential pharmaceutical chemicals for binding to at least one target binder involves flow-separating a solution of chemicals and target binders into separated components, exposing them to an x-ray excitation beam, detecting x-ray fluorescence signals from the components, and determining from the signals whether or not a binding event between a chemical and target binder has occurred.

Warner, Benjamin P. (Los Alamos, NM); Havrilla, George J. (Los Alamos, NM); Miller, Thomasin C. (Bartlesville, OK); Lewis, Cris (Los Alamos, NM); Mahan, Cynthia A. (Los Alamos, NM); Wells, Cyndi A. (Los Alamos, NM)

2009-04-14T23:59:59.000Z

329

On-line measurement of lignin in wood pulp by color shift of fluorescence  

DOE Patents (OSTI)

Lignin concentrations from wood pulp samples are measured by applying an excitation light at a selected wavelength to the samples in order to cause the lignin to emit fluorescence. A spectral distribution of the fluorescence emission is then determined. The lignin concentration is then calculated based on the spectral distribution signal. The spectral distribution is quantified by either a wavelength centroid method or a band ratio method. 6 figs.

Jeffers, L.A.; Malito, M.L.

1996-01-23T23:59:59.000Z

330

Stardust Interstellar Preliminary Examination VI: Quantitative elemental analysis by synchrotron X-ray fluorescence nanoimaging of eight impact features in aerogel  

E-Print Network (OSTI)

-ray fluorescence nanoimaging of eight impact features in aerogel Alexandre S. SIMIONOVICI1* , Laurence LEMELLE2

Nittler, Larry R.

331

N,N,NV,NV-tetramethyl-p-phenylenediamine initiates the appearance of a well-resolved I peak in the kinetics of chlorophyll fluorescence rise  

E-Print Network (OSTI)

fluorescence; Fm (=P)maximum level of chlorophyll fluorescence; Fv (=FmÃ?Fo), variable fluorescence; OEC, oxygen-evolving tissues, the initial fluorescence measured with all reaction centers in open state, Fo (O), rises to a peak level, Fm ( = P), observed when all reaction centers are closed, with two intermediate steps J (I1

Carpentier, Robert

332

Assessment of Nuclear Resonance Fluorescence for Spent Nuclear Fuel Assay  

SciTech Connect

In nuclear resonance fluorescence (NRF) measurements, resonances are excited by an external photon beam leading to the emission of gamma rays with specific energies that are characteristic of the emitting isotope. NRF promises the unique capability of directly quantifying a specific isotope without the need for unfolding the combined responses of several fissile isotopes as is required in other measurement techniques. We have analyzed the potential of NRF as a non-destructive analysis technique for quantitative measurements of Pu isotopes in spent nuclear fuel (SNF). Given the low concentrations of 239Pu in SNF and its small integrated NRF cross sections, the main challenge in achieving precise and accurate measurements lies in accruing sufficient counting statistics in a reasonable measurement time. Using analytical modeling, and simulations with the radiation transport code MCNPX that has been experimentally tested recently, the backscatter and transmission methods were quantitatively studied for differing photon sources and radiation detector types. Resonant photon count rates and measurement times were estimated for a range of photon source and detection parameters, which were used to determine photon source and gamma-ray detector requirements. The results indicate that systems based on a bremsstrahlung source and present detector technology are not practical for high-precision measurements of 239Pu in SNF. Measurements that achieve the desired uncertainties within hour-long measurements will either require stronger resonances, which may be expressed by other Pu isotopes, or require quasi-monoenergetic photon sources with intensities that are approximately two orders of magnitude higher than those currently being designed or proposed.This work is part of a larger effort sponsored by the Next Generation Safeguards Initiative to develop an integrated instrument, comprised of individual NDA techniques with complementary features, that is fully capable of determining Pu mass in spent fuel assemblies.

Quiter, Brian; Ludewigt, Bernhard; Ambers, Scott

2011-06-30T23:59:59.000Z

333

Hazard analysis of long term viewing of visible laser light off of fluorescent diffuse reflective surfaces (post-it).  

SciTech Connect

A laser hazard analysis is performed to evaluate if the use of fluorescent diffuse reflectors to view incident laser beams (Coherent Verdi 10W) present a hazard based on the ANSI Standard Z136.1-2000, American National Standard for the Safe Use of Lasers. The use of fluorescent diffuse reflectors in the alignment process does not pose an increased hazard because of the fluorescence at a different wavelength than that of the incident laser.

Augustoni, Arnold L.

2006-10-01T23:59:59.000Z

334

Fluorescence of PRODAN in Water: a Computational QM/MM MD Study  

SciTech Connect

Fluorescent properties of PRODAN (6-propionyl-2-dimethylaminonaphthalene) in water were studied by means of excited state molecular dynamics simulations employing a combined quantum mechanical and molecular mechanical approach with the time-dependent density functional theory (TD-DFT QM/MM MD). The state of the art coupled cluster method was used to benchmark density functional theory calculations. The influence of the water environment on PRODAN emission was investigated by employing several computational schemes with varying description of the solvent. The issue of the molecular geometry of the excited state PRODAN molecule in water was addressed. The experimental emission spectrum was reproduced for the planar excited state conformer of PRODAN in the extended environment of 300 explicit water molecules. The planar conformer was shown to be predominantly responsible for fluorescence. The twisted isomer is strongly stabilized in water, but rapidly evolve towards a conical intersection, and hence the twisted conformer is fluorescently inactive.

Pederzoli, Marek; Sobek, Lukas; Brabec, Jiri; Kowalski, Karol; Cwiklik, Lukasz; Pittner, Jiri

2014-03-28T23:59:59.000Z

335

Third Level Trigger for the Fluorescence Telescopes of the Pierre Auger Observatory  

E-Print Network (OSTI)

The trigger system for the Auger fluorescence telescopes is implemented in hard- and software for an efficient selection of fluorescence light tracks induced by high-energy extensive air showers. The algorithm of the third stage uses the multiplicity signal of the hardware for fast rejection of lightning events with above 99% efficiency. In a second step direct muon hits in the camera and random triggers are rejected by analyzing the space-time correlation of the pixels. The trigger algorithm was tested with measured and simulated showers and implemented in the electronics of the fluorescence telescopes. A comparison to a prototype trigger without multiplicity shows the superiority of this approach, e.g. the false rejection rate is a factor 10 lower.

A. Schmidt; T. Asch; H. Gemmeke; M. Kleifges; H. -J. Mathes; A. Menshikov; F. Schüssler; D. Tcherniakhovski

2008-08-01T23:59:59.000Z

336

Third Level Trigger for the Fluorescence Telescopes of the Pierre Auger Observatory  

E-Print Network (OSTI)

The trigger system for the Auger fluorescence telescopes is implemented in hard- and software for an efficient selection of fluorescence light tracks induced by high-energy extensive air showers. The algorithm of the third stage uses the multiplicity signal of the hardware for fast rejection of lightning events with above 99% efficiency. In a second step direct muon hits in the camera and random triggers are rejected by analyzing the space-time correlation of the pixels. The trigger algorithm was tested with measured and simulated showers and implemented in the electronics of the fluorescence telescopes. A comparison to a prototype trigger without multiplicity shows the superiority of this approach, e.g. the false rejection rate is a factor 10 lower.

Schmidt, A; Gemmeke, H; Kleifges, M; Mathes, H -J; Menchikov, A; Schüssler, F; Tcherniakhovski, D

2008-01-01T23:59:59.000Z

337

Fluorescence spectrum characteristic of ethanol–water excimer and mechanism of resonance energy transfer  

Science Journals Connector (OSTI)

The steady-state fluorescence spectrum characteristic of ethanol–water excimer has been studied in this paper. By analysing the features of the sharp emission spectrum with fine structures in a shortwave band and the characteristics of the broad and featureless fluorescence peaks in the longwave band, one can conclude that the excimers are formed between the new ethanol–water cluster molecules in the excited state and the ground state through the interaction among different chromophores. The excitation spectra in the two fluorescence bands have been studied, and their emission mechanisms have been ascertained based on the energy transfer theory. Furthermore, the critical distance of the resonance energy transfer has been calculated.

Liu Ying; Song Chun-Yuan; Luo Xiao-Sen; Lu Jian; Ni Xiao-Wu

2007-01-01T23:59:59.000Z

338

,,,"Incandescent","Standard Fluorescent","Compact Fluorescent","High-Intensity Discharge","Halogen"  

U.S. Energy Information Administration (EIA) Indexed Site

B39. Lighting Equipment, Floorspace, 1999" B39. Lighting Equipment, Floorspace, 1999" ,"Total Floorspace (million square feet)" ,"All Buildings","All Lit Buildings","Lighting Equipment (more than one may apply)" ,,,"Incandescent","Standard Fluorescent","Compact Fluorescent","High-Intensity Discharge","Halogen" "All Buildings ................",67338,64321,38156,60344,20666,19223,17926 "Building Floorspace" "(Square Feet)" "1,001 to 5,000 ...............",6774,5859,2946,5154,738,245,600 "5,001 to 10,000 ..............",8238,7464,4047,6722,1108,663,991 "10,001 to 25,000 .............",11153,10393,6055,9815,1759,1701,1996 "25,001 to 50,000 .............",9311,9053,5004,8344,2296,2224,1611

339

A portable time-domain LED fluorimeter for nanosecond fluorescence lifetime measurements  

SciTech Connect

Fluorescence lifetime measurements are becoming increasingly important in chemical and biological research. Time-domain lifetime measurements offer fluorescence multiplexing and improved handling of interferers compared with the frequency-domain technique. In this paper, an all solid-state, filterless, and highly portable light-emitting-diode based time-domain fluorimeter (LED TDF) is reported for the measurement of nanosecond fluorescence lifetimes. LED based excitation provides more wavelengths options compared to laser diode based excitation, but the excitation is less effective due to the uncollimated beam, less optical power, and longer latency in state transition. Pulse triggering and pre-bias techniques were implemented in our LED TDF to improve the peak optical power to over 100 mW. The proposed pulsing circuit achieved an excitation light fall time of less than 2 ns. Electrical resetting technique realized a time-gated photo-detector to remove the interference of the excitation light with fluorescence. These techniques allow the LED fluorimeter to accurately measure the fluorescence lifetime of fluorescein down to concentration of 0.5 ?M. In addition, all filters required in traditional instruments are eliminated for the non-attenuated excitation/emission light power. These achievements make the reported device attractive to biochemical laboratories seeking for highly portable lifetime detection devices for developing sensors based on fluorescence lifetime changes. The device was initially validated by measuring the lifetimes of three commercial fluorophores and comparing them with reported lifetime data. It was subsequently used to characterize a ZnSe quantum dot based DNA sensor.

Wang, Hongtao; Salthouse, Christopher D., E-mail: salthouse@ecs.umass.edu [Electrical and Computer Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003 (United States); Center for Personalized Health Monitoring, University of Massachusetts, Amherst, Massachusetts 01003 (United States); Qi, Ying; Mountziaris, T. J. [Center for Personalized Health Monitoring, University of Massachusetts, Amherst, Massachusetts 01003 (United States) [Center for Personalized Health Monitoring, University of Massachusetts, Amherst, Massachusetts 01003 (United States); Chemical Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003 (United States)

2014-05-15T23:59:59.000Z

340

Application of synchrotron radiation to x-ray fluorescence analysis of trace elements  

SciTech Connect

The development of synchrotron radiation x-ray sources has provided the means to greatly extend the capabilities of x-ray fluorescence analysis for determinations of trace element concentrations. A brief description of synchrotron radiation properties provides a background for a discussion of the improved detection limits compared to existing x-ray fluorescence techniques. Calculated detection limits for x-ray microprobes with micrometer spatial resolutions are described and compared with experimental results beginning to appear from a number of laboratories. The current activities and future plans for a dedicated x-ray microprobe beam line at the National Synchrotron Light Source (NSLS) of Brookhaven National Laboratory are presented.

Gordon, B.M.; Jones, K.W.; Hanson, A.L.

1986-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Reflectance and Fluorescence Confocal Microscope for Imaging of the Mouse Colon  

E-Print Network (OSTI)

and fluorescence microscope. 20 3.3 Image Formation To form a 2D image using a point-scanning confocal microscope, the beam must be scanned in two dimensions using scanning mirrors. The PMT records a voltage signal from each point which is assigned... and fluorescence microscope. 20 3.3 Image Formation To form a 2D image using a point-scanning confocal microscope, the beam must be scanned in two dimensions using scanning mirrors. The PMT records a voltage signal from each point which is assigned...

Saldua, Meagan Alyssa

2012-02-14T23:59:59.000Z

342

Fast repetition rate (FRR) fluorometer and method for measuring fluorescence and photosynthetic parameters  

DOE Patents (OSTI)

A fast repetition rate fluorometer device and method for measuring in vivo fluorescence of phytoplankton or higher plants chlorophyll and photosynthetic parameters of phytoplankton or higher plants is revealed. The phytoplankton or higher plants are illuminated with a series of fast repetition rate excitation flashes effective to bring about and measure resultant changes in fluorescence yield of their Photosystem II. The series of fast repetition rate excitation flashes has a predetermined energy per flash and a rate greater than 10,000 Hz. Also, disclosed is a flasher circuit for producing the series of fast repetition rate flashes. 14 figs.

Kolber, Z.; Falkowski, P.

1995-06-20T23:59:59.000Z

343

A Fast and Selective Near-Infrared Fluorescent Sensor for Multicolor Imaging of Biological Nitroxyl (HNO)  

Science Journals Connector (OSTI)

A Fast and Selective Near-Infrared Fluorescent Sensor for Multicolor Imaging of Biological Nitroxyl (HNO) ... Nitric oxide was passed through an Ascarite column and a 6 ft coil containing silica gel at ?78 °C to remove impurities and then collected and stored under nitrogen in a gas storage bulb. ... Treatment of these cells with 3 mM Angeli’s salt led to an increase in fluorescence in both the NIR channel and the green channel (Figure 6C,E,H). ...

Alexandra T. Wrobel; Timothy C. Johnstone; Alexandria Deliz Liang; Stephen J. Lippard; Pablo Rivera-Fuentes

2014-02-24T23:59:59.000Z

344

Mercury Vapor Release from Broken Compact Fluorescent Lamps and In Situ Capture by New Nanomaterial Sorbents  

Science Journals Connector (OSTI)

There is one report of Hg poisoning (acrodynia) in a child exposed to broken tube-type fluorescents in a detailed case study presented by Tunnessen et al. (6). ... Similar release patterns but lower amounts were seen for spent bulbs (example result 90 ?g in 24 h) or from the fracture site of a new bulb after glass removal to simulate cleanup. ... Artificial lighting systems are transitioning from incandescent to compact fluorescent lamp (CFL) and light-emitting diode (LED) bulbs in response to the U.S. Energy Independence and Security Act and the EU Ecodesign Directive, which leads to energy ... ...

Natalie C. Johnson; Shawn Manchester; Love Sarin; Yuming Gao; Indrek Kulaots; Robert H. Hurt

2008-06-27T23:59:59.000Z

345

Energy Dispersive X-ray Fluorescence Analysis of Sulfur in Biomass  

Science Journals Connector (OSTI)

An energy dispersive X-ray fluorescence (ED-XRF) spectroscopy method was developed to analyze low ppm level sulfur (S) in biomass feedstocks and in subsequent residues from pretreatment reactions. ... Representative biomass feedstocks and pretreatment residues were analyzed for S. ... The goal of this project was to determine whether an energy dispersive X-ray fluorescence (ED-XRF) spectroscopy method is effective in conducting sulfur analysis of woody biomass feedstocks at an appropriately useful sensitivity, especially when used to effectively monitor the extent of sulfur removal after biomass pretreatment reactions. ...

J. Michael Robinson; Staci R. Barrett; Kevin Nhoy; Rajesh K. Pandey; Joseph Phillips; Oscar M. Ramirez; Richard I. Rodriguez

2009-03-06T23:59:59.000Z

346

X-RAY FLUORESCENCE ANALYSIS OF HANFORD LOW ACTIVITY WASTE SIMULANTS METHOD DEVELOPMENT  

SciTech Connect

The x-ray fluorescence laboratory (XRF) in the Analytical Development Directorate (ADD) of the Savannah River National Laboratory (SRNL) was requested to develop an x-ray fluorescence spectrometry method for elemental characterization of the Hanford Tank Waste Treatment and Immobilization Plant (WTP) pretreated low activity waste (LAW) stream to the LAW Vitrification Plant. The WTP is evaluating the potential for using XRF as a rapid turnaround technique to support LAW product compliance and glass former batching. The overall objective of this task was to develop an XRF analytical method that provides rapid turnaround time (<8 hours), while providing sufficient accuracy and precision to determine variations in waste.

Jurgensen, A; David Missimer, D; Ronny Rutherford, R

2007-08-08T23:59:59.000Z

347

Investigation and technique in the fluorescent spectra examination of crude oil  

E-Print Network (OSTI)

by chromato- graphy and distillation. The adsorbent was Alcoa activated alumina, chromatographic grade F-20. Support for the adsorbent was Pyrex brand glass fibre and cleaned B 0, A. sea sand. 11 DEVELOPl';, 'EI&T OF TEOHN IQUE Fluorescent intensity..., the cut between 2F2 and 2P$ was exactly between the two bands. The similarity of the fluorescent spectra of 1E1, 1E2, and 1E?i with 2F1, 2P2, and 2F$ (Figures 11, 12, 1B and 19) shows the similarity in the developing power of chloroform and. ether. A...

Chambers, Gilbert Vester

1958-01-01T23:59:59.000Z

348

$\\mathrm{CO_2}$ exploding clusters dynamics probed by XUV fluorescence  

E-Print Network (OSTI)

Clusters excited by intense laser pulses are a unique source of warm dense matter, that has been the subject of intensive experimental studies. The majority of those investigations concerns atomic clusters, whereas the evolution of molecular clusters excited by intense laser pulses is less explored. In this work we trace the dynamics of $\\mathrm{CO_2}$ clusters triggered by a few-cycle 1.45-$\\mu$m driving pulse through the detection of XUV fluorescence induced by a delayed 800-nm ignition pulse. Striking differences among fluorescence dynamics from different ionic species are observed.

Negro, M; Fabre, B; Dorchies, F; Devetta, M; Staedter, D; Vozzi, C; Mairesse, Y; Stagira, S

2014-01-01T23:59:59.000Z

349

Method for detecting binding events using micro-X-ray fluorescence spectrometry  

DOE Patents (OSTI)

Method for detecting binding events using micro-X-ray fluorescence spectrometry. Receptors are exposed to at least one potential binder and arrayed on a substrate support. Each member of the array is exposed to X-ray radiation. The magnitude of a detectable X-ray fluorescence signal for at least one element can be used to determine whether a binding event between a binder and a receptor has occurred, and can provide information related to the extent of binding between the binder and receptor.

Warner, Benjamin P. (Los Alamos, NM); Havrilla, George J. (Los Alamos, NM); Mann, Grace (Hong Kong, HK)

2010-12-28T23:59:59.000Z

350

First-Principles Characterization of the Energy Landscape and Optical Spectra of Green Fluorescent Protein along the AIB  

E-Print Network (OSTI)

First-Principles Characterization of the Energy Landscape and Optical Spectra of Green Fluorescent Supporting Information ABSTRACT: Structures and optical spectra of the green fluorescent protein (GFP) forms-form) is lowest in energy, whereas the systems with the anionic chromophore (B- and I-forms) are about 1 kcal

Krylov, Anna I.

351

Reversible Modification of CdSe-CdS/ZnS Quantum Dot Fluorescence by Surrounding Ca2+  

E-Print Network (OSTI)

Reversible Modification of CdSe-CdS/ZnS Quantum Dot Fluorescence by Surrounding Ca2+ Ions Li Li (3-MPA) coated CdSe-CdS/ZnS core-multishell QDs when free Ca2+ ions were added to and subsequently removed from the QD solution. It was found that QD fluorescence intensity was reduced when Ca2+ ions were

Haviland, David

352

Global analysis of Fo rster resonance energy transfer in live cells measured by fluorescence lifetime imaging microscopy exploiting  

E-Print Network (OSTI)

Global analysis of Fo¨ rster resonance energy transfer in live cells measured by fluorescence of Fo¨ rster resonance energy transfer (FRET) in live cells using the rise time of acceptor fluorescence those molecules that are involved in the energy-transfer process are monitored. This contrasts

van Stokkum, Ivo

353

Single-Molecule Fluorescence Studies of Protein Folding and Conformational Xavier Michalet,* Shimon Weiss, and Marcus Jager*  

E-Print Network (OSTI)

Single-Molecule Fluorescence Studies of Protein Folding and Conformational Dynamics Xavier Michalet. Single-Molecule Fluorescence Studies of Protein Folding and Conformations at Equilibrium 1796 4-Molecule Protein Folding under Nonequilibrium Conditions 1808 6. Conclusion 1809 7. Acknowledgments 1810 8

Michalet, Xavier

354

Simple Method to Enhance the Photostability of the Fluorescence Reporter R6G for Prolonged Single-Molecule Studies  

E-Print Network (OSTI)

Simple Method to Enhance the Photostability of the Fluorescence Reporter R6G for Prolonged Single-Molecule, Philadelphia, Pennsylvania 19104, United States ABSTRACT: For fluorescence-based single-molecule studies, photo for single-molecule detection but can also significantly increase the survival time of individual R6G

Shorter, James

355

Photophysics of DsRed, a Red Fluorescent Protein, from the Ensemble to the Single-Molecule Level  

E-Print Network (OSTI)

Photophysics of DsRed, a Red Fluorescent Protein, from the Ensemble to the Single-Molecule Level B-wavelength substitute for green fluorescent protein (GFP) mutants for in vivo protein labeling. Bulk and single-molecule is not an issue in physiological studies. Introduction Single-molecule spectroscopy (SMS) continues to play

Boxer, Steven G.

356

Excitation of sensitized fluorescence of europium and curium in an aqueous solution of thenoyltrifluoroacetone by a nitrogen laser  

SciTech Connect

The fluorescence spectrum of trivalent europium in aqueous solutions of thenoyltrifluoroacetone, excited by a nitrogen laser with emission wavelength 337 nm, exhibits bands at 582, 593, 616, 650, and 695 nm. Two bands appear in the fluorescence spectrum of trivalent curium under the same conditions - at 598 and 607 nm. The times of quenching of the fluorescence of the ions of these elements were measured, both in H/sub 2/O medium and in D/sub 2/O. A linear relationship was found between the fluorescence intensity of europium and curium and their concentration in TTA solution. The limit of determination of europium and curium by the fluorescent method with laser excitation using the bands at 615 and 607 nm proved equal to 0.3 and 0.07 ng/ml, respectively.

Dem'yanova, T.A.; Stepanov, A.V.; Babaev, A.S.; Aleksandruk, V.M.

1987-03-01T23:59:59.000Z

357

Novel Al2O3:C,Mg fluorescent nuclear track detectors for passive neutron dosimetry  

Science Journals Connector (OSTI)

......technique based on laser scanning and...do not require protection from visible...elsewhere(5). Laser-induced fluorescence...635-nm red laser diode without photoionisation...piezoelectric actuator to detect the...technique based on laser scanning and...methods Radiation Protection instrumentation......

G. Jeff Sykora; Mark S. Akselrod; M. Salasky; Stephen A. Marino

2007-08-01T23:59:59.000Z

358

Laser-excited atomic fluorescence spectrometry in a graphite furnace with an  

E-Print Network (OSTI)

Laser-excited atomic fluorescence spectrometry in a graphite furnace with an optical parametric oscillator laser for sequential multi-element determination of cadmium, cobalt, lead, manganese and thallium, for the ® rst time, that solid-state lasers required for analysis (ml or mg) and the technique has direct based

Michel, Robert G.

359

Frequently Asked Questions Information on Compact Fluorescent Light Bulbs (CFLs) and Mercury  

E-Print Network (OSTI)

Frequently Asked Questions Information on Compact Fluorescent Light Bulbs (CFLs) and Mercury emissions equivalent to those of more than 800,000 cars. Do CFLs contain mercury? CFLs contain a very small amount of mercury sealed within the glass tubing ­ an average of 5 milligrams ­ about the amount

Jia, Songtao

360

Micro-Raman Spectroscopy of Algae: Composition Analysis and Fluorescence Background Behavior  

E-Print Network (OSTI)

analysis; biodiesel Introduction To date, analysis of algae composition is a multi-staged processARTICLE Micro-Raman Spectroscopy of Algae: Composition Analysis and Fluorescence Background performed using Stokes Raman scattering for compositional analysis of algae. Two algal species, Chlorella

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

An efficient fluorescent sensing platform for biomolecules based on fenton reaction triggered molecular beacon cleavage strategy  

E-Print Network (OSTI)

An efficient fluorescent sensing platform for biomolecules based on fenton reaction triggered/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha: Molecular beacons Fenton reaction Glucose Choline Biosensor a b s t r a c t A universal sensing platform

Tan, Weihong

362

Intercellular trafficking of a KNOTTED1 green fluorescent protein fusion in the leaf and  

E-Print Network (OSTI)

Intercellular trafficking of a KNOTTED1 green fluorescent protein fusion in the leaf and shoot Jackson¶ Cold Spring Harbor Laboratory, Watson School of Biological Sciences, 1 Bungtown Road, Cold Spring between epidermal cells of Arabidopsis and onion. When expressed in vivo, the GFP KN1 fusion trafficked

Jackson, David

363

Fluorescence technique for on-line monitoring of state of hydrogen-producing microorganisms  

DOE Patents (OSTI)

In situ fluorescence method to monitor state of sulfur-deprived algal culture's ability to produce H.sub.2 under sulfur depletion, comprising: a) providing sulfur-deprived algal culture; b) illuminating culture; c) measuring onset of H.sub.2 percentage in produced gas phase at multiple times to ascertain point immediately after anerobiosis to obtain H.sub.2 data as function of time; and d) determining any abrupt change in three in situ fluorescence parameters; i) increase in F.sub.t (steady-state level of chlorophyll fluorescence in light adapted cells); ii) decrease in F.sub.m', (maximal saturating light induced fluorescence level in light adapted cells); and iii) decrease in .DELTA.F/F.sub.m'=(F.sub.m'-F.sub.t)/F.sub.m' (calculated photochemical activity of photosystem II (PSII) signaling full reduction of plastoquinone pool between PSII and PSI, which indicates start of anaerobic conditions that induces synthesis of hydrogenase enzyme for subsequent H.sub.2 production that signal oxidation of plastoquinone pool asmain factor to regulate H.sub.2 under sulfur depletion.

Seibert, Michael (Lakewood, CO); Makarova, Valeriya (Golden, CO); Tsygankov, Anatoly A. (Pushchino, RU); Rubin, Andrew B. (Moscow, RU)

2007-06-12T23:59:59.000Z

364

Fluorescent probes for non-invasive bioenergetic studies of whole cyanobacterial cells  

E-Print Network (OSTI)

Fluorescent probes for non-invasive bioenergetic studies of whole cyanobacterial cells Markus of bioenergetic processes in whole cells of the cyanobacterium Synechocystis sp. PCC 6803. Acridine yellow to be created. In sum- mary, bioenergetic £uorescence measurement com- bines the advantages of an easy

Roegner, Matthias

365

Effect of Combining Far-Red Light with Shorter Wave Light on the Excitation of Fluorescence  

E-Print Network (OSTI)

of Fluorescence in Chlorella Recent experiments on the rate of photosyn- thesis in far-red light alone that the quantum yield of Auo- rescence in Chlorella drops when excitation is achieved by light above 680 ml* (10- teen experiments of this type are summarized in Table I. Chlorella pyrenoidosa Strain 3 were used

Govindjee

366

Proceedings of ICRC 2001: 741 c Copernicus Gesellschaft 2001 Calibration of the Auger Fluorescence Telescopes  

E-Print Network (OSTI)

Norte 304, (5613) Malarg¨ue, Argentina Abstract. Thirty fluorescence telescopes in four stations development (Xmax) and determi- nation of the absolute energy of EHE events. A telescope camera contains 440 in Argentina are discussed. 1 Introduction The southern hemisphere experiment of the Pierre Auger Ob- servatory

367

28th International Cosmic Ray Conference 465 Atmospheric Monitoring for the Pierre Auger Fluorescence  

E-Print Network (OSTI)

, Albuquerque, NM 87131 (2) Observatorio Pierre Auger, Malarg¨ue, (5613) Mendoza, Argentina Abstract Major uncertainties in the fluorescence energy measurement come from the precision of various atmospheric transmission, is summarized in this paper. 1. Introduction A reliable air shower energy scale and energy resolution is central

368

Sensors and Actuators B 107 (2005) 121125 Two photon fluorescence sensors based on resonant grating  

E-Print Network (OSTI)

Sensors and Actuators B 107 (2005) 121­125 Two photon fluorescence sensors based on resonant the excitation and emission radia- tion reduces the background noise, the static photobleaching.07.040 #12;122 T. Katchalski et al. / Sensors and Actuators B 107 (2005) 121­125 lar, they are compact

Friesem, Asher A.

369

Video-Rate Scanning Two-Photon Excitation Fluorescence Microscopy and Ratio Imaging with Cameleons  

E-Print Network (OSTI)

Video-Rate Scanning Two-Photon Excitation Fluorescence Microscopy and Ratio Imaging with Cameleons ABSTRACT A video-rate (30 frames/s) scanning two-photon excitation microscope has been successfully tested 690 to 1050 nm, prechirper optics for laser pulse-width compression, resonant galvanometer for video

Tsien, Roger Y.

370

Fluorescent silica colloids for study and visualization of skin care products  

E-Print Network (OSTI)

due to long exposures to cold and dry air (7). Different skin care products are used to hy- drate dryFluorescent silica colloids for study and visualization of skin care products Swaminathan Iyer: The efficacy of skin care products depends on the time and dynamics of their absorbance by the skin, and its

Sokolov, Igor

371

Deep-Sea Research I 50 (2003) 417434 Phytoplankton natural fluorescence variability in the  

E-Print Network (OSTI)

capacity and community composi- tion. Solar-stimulated, or ``natural'' fluorescence is a passive of California, Santa Barbara, Santa Barbara, CA 93106-3060, USA Received 10 October 2001; received in revised Science, University of California, Santa Barbara, Santa Barbara, CA 93106-3060, USA. Fax: +1

California at Santa Barbara, University of

372

Preliminary evaluation of a fluorescence and radioisotope nuclear smuggling deterrence tag - final report (IL500E)  

SciTech Connect

This report summarizes the efforts completed in identifying candidate fluorescence compounds and radioisotopes for a developing tagging system. The tagging system is being developed as a deterrent to nuclear smuggling, by providing a means of: (1) tracing materials and pilferers to the facility of origin for any recovered special nuclear materials, (2) inventory control of long-term stored items containing special nuclear materials, and (3) tracking materials transferred between facilities. The system uses three types of materials to cover a range of applications intended to prevent the pilfering of special nuclear materials. One material, fluorescent compounds which are invisible without ultraviolet or near-infrared detection systems, is marked on controlled items with a tracking pattern that corresponds to a specified item in a specified location in the data control system. The tagging system uses an invisible, fluorescent dusting powder to mark equipment and personnel who inappropriately handle the tagged material. The tagging system also uses unique combinations of radionuclides to identify the facility of origin for any special nuclear material. This report also summarizes the efforts completed in identifying hardware that will be used for the tagging system. This hardware includes the devices for applying the tagging materials, the commercially available fluorescence detection systems, and gamma ray detection systems assembled from existing, commercially available technologies.

Hartenstein, S.D.; Aryaeinejad, R.; Delmastro, J.R. [and others

1997-04-01T23:59:59.000Z

373

Hybrid Electrochromic Fluorescent Poly(DNTD)/CdSe@ZnS Composite Films  

E-Print Network (OSTI)

Hybrid Electrochromic Fluorescent Poly(DNTD)/CdSe@ZnS Composite Films Huige Wei, Xingru Yan, Springdale, Arkansas 72764, United States ABSTRACT: Hybrid electrochromic poly(DNTD)/CdSe@ZnS quantum dots of an electrical current after the application of an appropriate electrode potential.15-17 The electrochromic

Guo, John Zhanhu

374

Abstract--A low noise optical sensor and biocompatible microscale optical filters for integrated fluorescence sensors  

E-Print Network (OSTI)

Abstract--A low noise optical sensor and biocompatible microscale optical filters for integrated fluorescence sensors were developed and tested. The sensor was fabricated in a 0.5 µm CMOS process. The measured reset noise of the sensor is reduced by a factor of 10 compared to conventional active pixel

Maryland at College Park, University of

375

Strategies for laser-induced fluorescence detection of nitric oxide in high-pressure flames.  

E-Print Network (OSTI)

engines and gas turbines where the combustion chamber is at high pressure. Despite the use of catalyticStrategies for laser-induced fluorescence detection of nitric oxide in high-pressure flames. II. A combustion systems3�13 and thus develop new schemes to mini- mize NO effluent. The high operating pressure

Lee, Tonghun

376

Traits of fluorescent Pseudomonas spp. involved in suppression of plant root pathogens.  

Science Journals Connector (OSTI)

...problems with the commercialization of these beneficial...characteristics for this process and the performance...summarized. The commercialization of fluorescent...facilitate this process by enabling the...problems with the commercialization of these beneficial...characteristics for this process and the performance...

D J O'Sullivan; F O'Gara

1992-12-01T23:59:59.000Z

377

Low-energy X-ray fluorescence microscopy opening new opportunities for bio-related research  

Science Journals Connector (OSTI)

...and (g) zinc. Photon energy: 1467 eV. Dwell time...magnesium. Excitation photon energy 1686 eV. Dwell time per...Development of a low-energy X-ray fluorescence system...Spence), pp. 835-926. New York, NY: Springer. ( doi...

2009-01-01T23:59:59.000Z

378

Single-molecule protein folding: Diffusion fluorescence resonance energy transfer studies  

E-Print Network (OSTI)

Single-molecule protein folding: Diffusion fluorescence resonance energy transfer studies for protein folding studies and has been extensively stud- ied, both experimentally (at the ensemble level concentration. It is shown that new infor- mation about different aspects of the protein folding reaction can

Croquette, Vincent

379

Fluorescent chemosensor for reactive organohalides in micellar solution with an example of autocatalysiswz  

E-Print Network (OSTI)

-alkylation reaction by forming a non-covalent pre-reaction complex that undergoes a rapid SN2 reaction inside-Alkylation of a fluorescent macrocyclic amine in aqueous micellar solution produces enhanced emission; the reaction The sensing effect is due to an accelerated N-alkylation reaction that produces a quaternary ammonium product

Smith, Bradley D.

380

Single-molecule fluorescence studies from a bioinorganic perspective Peng Chen *, Nesha May Andoy  

E-Print Network (OSTI)

Review Single-molecule fluorescence studies from a bioinorganic perspective Peng Chen *, Nesha May. Solomon. Abstract In recent years, single-molecule methods have enabled many innovative studies machineries. Single-molecule studies of bioinorganic systems have been limited, how- ever, even though

Chen, Peng

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

What’s in an EEM? Molecular Signatures Associated with Dissolved Organic Fluorescence in Boreal Canada  

Science Journals Connector (OSTI)

Molecular Signatures Associated with Dissolved Organic Fluorescence in Boreal Canada ... Of these three humic-like components, P3 was the most photolabile,(19) possibly because its excitation maximum extends furthest into the solar spectrum(30) (Table 1; SI Figure S1). ...

A. Stubbins; J.-F. Lapierre; M. Berggren; Y. T. Prairie; T. Dittmar; P. A. del Giorgio

2014-08-22T23:59:59.000Z

382

Fluorescence-Based Quasicontinuous and In Situ Monitoring of Biofilm Formation Dynamics in Natural Marine Environments  

Science Journals Connector (OSTI)

...and about 90% from the first 10 mm), deep enough...exposed to an optical output power of about 600 muW, and...measurement cycles. The first measurement, which was...compositions of lakes and oceans: a first comparison based on fluorescence...

M. Fischer; G. Friedrichs; T. Lachnit

2014-04-11T23:59:59.000Z

383

Can we measure terrestrial photosynthesis from space directly, using spectral reflectance and fluorescence?  

E-Print Network (OSTI)

Can we measure terrestrial photosynthesis from space directly, using spectral reflectance the changes in the xanthophyll cycle, which is closely coupled to photosynthesis. Several studies have shown of fluorescence, which is a directly related to the efficiency of photosynthesis. We discuss the state of the art

Jones, Peter JS

384

Dynamics of Vacuoles and H+-Pyrophosphatase Visualized by Monomeric Green Fluorescent Protein in Arabidopsis: Artifactual Bulbs and Native Intravacuolar Spherical Structures  

Science Journals Connector (OSTI)

...an artifactual fluorescence resonance energy transfer reaction on membranes (Zacharias...reported. In a fluorescence resonance energy transfer assay for membrane proteins...1507-1523. Espiau, B. , Lemercier, G., Ambit, A., Bringaud, F., Merlin, G...

Shoji Segami; Sachi Makino; Ai Miyake; Mariko Asaoka; Masayoshi Maeshima

2014-08-12T23:59:59.000Z

385

Frequency measurements of saturated-fluorescence-stabilized CO2 laser lines: comparison with an OsO4-stabilized CO2 laser standard  

Science Journals Connector (OSTI)

frequency grid, to test the performance of the saturated fluorescence method for CO2 laser frequency stabilization. The Allan variance for the saturated-fluorescence-stabilized CO2 laser reached 60 Hz for an int...

B. Frech; L.F. Constantin; A. Amy-Klein; O. Phavorin; C. Daussy…

1998-08-01T23:59:59.000Z

386

Synthesis of antibodies-conjugated fluorescent dye-doped silica nanoparticles for a rapid single step detection of campylobacter jejuni in live poultry  

Science Journals Connector (OSTI)

The preparation of antibodies-conjugated fluorescent dye-doped silica nanoparticles (FDS-NPs) was developed to detect Campylobacter jejuni cells under a fluorescence microscope. The particles prepared by sol-gel microemulsion techniques have a round ...

Wachira Tansub; Kooranee Tuitemwong; Pichet Limsuwan; Supannee Theparoonrat; Pravate Tuitemwong

2012-01-01T23:59:59.000Z

387

(Funding source: NASA Grant NNC04GB52G, 2004-2009 and NSF Grant CTS-0086988, 2001-2005) Invention Summary For: "Fluorescence and Fiber-Optics  

E-Print Network (OSTI)

and temperature control (with the help of thermo-electric coolers) of the laser housing, fluorescence meter

Narain, Amitabh

388

Green Fluorescent Protein-Labeled Monitoring Tool To Quantify Conjugative Plasmid Transfer between Gram-Positive and Gram-Negative Bacteria  

Science Journals Connector (OSTI)

...February 2012 research-article Methods Green Fluorescent Protein-Labeled Monitoring...Germany. On the basis of pIP501, a green fluorescent protein (GFP)-tagged monitoring...and Espinosa (30) have constructed a green fluorescent protein (GFP)-tagged derivative...

Karsten Arends; Katarzyna Schiwon; Türkan Sakinc; Johannes Hübner; Elisabeth Grohmann

2011-12-02T23:59:59.000Z

389

Types of Lighting in Commercial Buildings - Lighting Types  

U.S. Energy Information Administration (EIA) Indexed Site

Lighting Types Lighting Types The following are the most widely used types of lighting equipment used in commercial buildings. Characteristics such as energy efficiency, light quality, and lifetime vary by lamp type. Standard Fluorescent A fluorescent lamp consists of a sealed gas-filled tube. The gas in the tube consists of a mixture of low pressure mercury vapor and an inert gas such as argon. The inner surface of the tube has a coating of phosphor powder. When an electrical current is applied to electrodes in the tube, the mercury vapor emits ultraviolet radiation which then causes the phosphor coating to emit visible light (the process is termed fluorescence). A ballast is required to regulate and control the current and voltage. Two types of ballasts are used, magnetic and electronic. Electronic ballasts

390

BEFORE THE U.S. DEPARTMENT OF ENERGY  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Philips Lighting Electronics N. A. Philips Lighting Electronics N. A. (fluorescent lamp ballasts) ) ) ) ) ) Case Number: 2012-SE-2605 Issued: August 31, 2012 NOTICE OF NONCOMPLIANCE DETERMINATION Fluorescent lamp ballasts are covered products subject to federal energy conservation standards as described in 42 U.S.C. §§ 6292(a)(13), 6295(g) and IO C.P.R.§ 430.32(m). Manufacturers and private labelers are prohibited from distributing covered products that do not comply with the applicable conservation standards. 10 C.P.R. § 429.102(a)(6); 42 U.S. C.§ 6302(a)(5). In February of this year, Philips Lighting Electronics N. A. ("Philips") submitted certification report CCMS # 9935, ce1tifying that fluorescent lamp ballast basic model VEL-I S40-SC was not in compliance with the applicable energy conservation standards. Philips notified the U.S.

391

Air Fluorescence Calorimetry with the High Resolution Fly's Eye and Telescope Array Experiments  

SciTech Connect

The air fluorescence technique was first successfully deployed on the Fly's Eye Experiment (1981-1993) by the University of Utah. Its successor, the High Resolution Fly's Eye (HiRes) experiment has further exploited this technique, first in hybrid mode with the MIA muon array (1993-1996), and then in monocular and stereoscopic modes (1997-2006). Results from HiRes will be presented, including evidence for the Greisen-Zatsepin-K'uzmin (GZK) Effect predicted 40 years ago. Most recently, members of the HiRes are collaborating with groups from Japan, led by University of Tokyo, to construct and operate the Telescope Array (TA) experiment, which will deploy a large scintillation-based ground array in combination with fluorescence detectors. Funding for TA in the US has already been approved by NSF. TA will begin operation in 2007.

Jui, Charles C. H. [Department of Physics, University of Utah Salt Lake City, Utah (United States)

2006-10-27T23:59:59.000Z

392

Artificial neural networks for processing fluorescence spectroscopy data in skin cancer diagnostics  

Science Journals Connector (OSTI)

Over the years various optical spectroscopic techniques have been widely used as diagnostic tools in the discrimination of many types of malignant diseases. Recently, synchronous fluorescent spectroscopy (SFS) coupled with chemometrics has been applied in cancer diagnostics. The SFS method involves simultaneous scanning of both emission and excitation wavelengths while keeping the interval of wavelengths (constant-wavelength mode) or frequencies (constant-energy mode) between them constant. This method is fast, relatively inexpensive, sensitive and non-invasive. Total synchronous fluorescence spectra of normal skin, nevus and melanoma samples were used as input for training of artificial neural networks. Two different types of artificial neural networks were trained, the self-organizing map and the feed-forward neural network. Histopathology results of investigated skin samples were used as the gold standard for network output. Based on the obtained classification success rate of neural networks, we concluded that both networks provided high sensitivity with classification errors between 2 and 4%.

L Lenhardt; I Zekovi?; T Drami?anin; M D Drami?anin

2013-01-01T23:59:59.000Z

393

Approximate Marginalization of Absorption and Scattering in Fluorescence Diffuse Optical Tomography  

E-Print Network (OSTI)

In fluorescence diffuse optical tomography (fDOT), the reconstruction of the fluorophore concentration inside the target body is usually carried out using a normalized Born approximation model where the measured fluorescent emission data is scaled by measured excitation data. One of the benefits of the model is that it can tolerate inaccuracy in the absorption and scattering distributions that are used in the construction of the forward model to some extent. In this paper, we employ the recently proposed Bayesian approximation error approach to fDOT for compensating for the modeling errors caused by the inaccurately known optical properties of the target in combination with the normalized Born approximation model. The approach is evaluated using a simulated test case with different amount of error in the optical properties. The results show that the Bayesian approximation error approach improves the tolerance of fDOT imaging against modeling errors caused by inaccurately known absorption and scattering of the...

Mozumder, Meghdoot; Arridge, Simon; Kaipio, Jari P; d'Andrea, Cosimo; Kolehmainen, Ville

2015-01-01T23:59:59.000Z

394

Doppler-shifted fluorescence imaging of velocity fields in supersonic reacting flows  

SciTech Connect

The application of Doppler-shifted fluorescence imaging of velocity fields in supersonic reacting flows is analyzed. Focussing on fluorescence of the OH molecule in typical H2-air Scramjet flows, the effects of uncharacterized variations in temperature, pressure, and collisional partner composition across the measurement plane are examined. Detailed measurements of the (1,0) band OH lineshape variations in H2-air combustions are used, along with single-pulse and time-averaged measurements of an excimer-pumped dye laser, to predict the performance of a model velocimeter with typical Scramjet flow properties. The analysis demonstrates the need for modification and control of the laser bandshape in order to permit accurate velocity measurements in the presence of multivariant flow properties. 13 refs.

Allen, M.G.; Davis, S.J.; Kessler, W.J.; Sonnenfroh, D.M. (Physical Sciences, Inc., Andover, MA (United States))

1992-07-01T23:59:59.000Z

395

Interplay between excited-state intramolecular proton transfer and charge transfer in flavonols and their use as protein-binding-site fluorescence probes  

SciTech Connect

A comparative study is presented of competitive fluorescences of three flavonols, 3-hydroxyflavone, 3,3[prime],4[prime],7-tetrahydroxyflavone (fisetin), and 4[prime]-diethylamino-3-hydroxyflavone (DHF). The normal fluorescence S[sub 1] [yields] S[sub 0] (400-nm region) is largely replaced by the proton-transfer tautomer fluorescence S[prime][sub 1] [yields] S[prime][sub 0] in the 550-nm region for all three of the flavonols in aprotic solvents at room temperature. For DHF in polar solvents the normal fluorescence becomes a charge-transfer fluorescence (460-500 nm) which competes strongly with the still dominant proton-transfer fluorescence (at 570 nm). In protic solvents, and at 77 K, the interference with intramolecular hydrogen bonding gives rise to greatly enhanced normal fluorescence, lowering the quantum yield of proton-transfer fluorescence. The utility of DHF as a discriminating fluorescence probe for protein binding sites is suggested by the strong dependence of the charge-transfer fluorescence on polarity of the environment and by various static and dynamic parameters of the charge-transfer and proton-transfer fluorescence which can be determined. 49 refs., 6 figs., 1 tab.

Sytnik, A.; Gormin, D.; Kasha, M. (Florida State Univ., Tallahassee, FL (United States))

1994-12-06T23:59:59.000Z

396

Improved fluorescence-enhanced optical imaging and tomography by enhanced excitation light rejection  

E-Print Network (OSTI)

) .................................................................88 xvi NOMENCLATURE Abbreviations 2-D Two-dimension 3-D Three-dimension ACR Amplitude ratio AOI Angle of incidence CCD Charge coupled device CT Computed tomography CW... molecular markers of disease at pico-molar to nano-molar concentrations. Light in the UV-visible range does not enable deep 7 penetration for fluorescence imaging mainly because of autofluorescence and a high level of endogenous absorbers...

Hwang, Kil Dong

2009-05-15T23:59:59.000Z

397

MESSENGER detection of electron-induced X-ray fluorescence from Mercury's surface  

E-Print Network (OSTI)

. Rhodes,4 Charles E. Schlemm II,4 Sean C. Solomon,3,5 and Pavel M. Trávnícek6 Received 2 May 2012; revised methodologies. Derived S and Ca abundances are somewhat higher than derived from the solar-induced fluorescence. Schlemm II, S. C. Solomon, and P. M. Trávnícek (2012), MESSENGER detection of electron-induced X

California at Berkeley, University of

398

Growth and pigment content of Gracilaria tikvahiae McLachlan under fluorescent and LED lighting  

Science Journals Connector (OSTI)

Abstract Light emitting diode (LED) technology has significant potential advantages over other light sources in algal aquaculture. This study investigated \\{LEDs\\} as light sources for the culture of Gracilaria tikvahiae. We cultured a wild-type and a green mutant strain of G. tikvahiae, comparing growth rate and tissue chlorophyll a, total carotenoids, and phycobiliprotein concentrations under high output cool white fluorescent, pure primary color LED, and mixed LED lighting. Under monochromatic light, the growth rates under high output cool white fluorescent lighting were significantly higher than rates under pure LED light (all three colors for wild strain and green and blue for green mutant). However, when pure color LED lighting was mixed (50%/50%), the red + green (wild-type strain and green mutant) and the green + blue LED combinations (wild-type only) showed growth rates similar to those under high output cool white fluorescent lighting. In the trichromatic experiment, growth of the wild-type strain under mixed three-color (40%/40%/20%) LED light was indistinguishable from those of the fluorescent control lighting. Chlorophyll a and carotenoid concentrations of Gracilaria grown in the dichromatic light experiment were 55% and 74% higher, respectively, under red + blue LED lighting than under the other light treatments. The wild-type strain of G. tikvahiae possessed significantly greater concentrations of chlorophyll a, and phycoerythrin than did the green mutant, while green mutant thalli had higher phycocyanin levels. With rising LED efficiency and energy savings, \\{LEDs\\} will be an increasingly better choice for indoor seaweed cultivation, especially if control of pigment production and morphogenesis by selective use of particular wavelengths is desirable.

Jang K. Kim; Yunxiang Mao; George Kraemer; Charles Yarish

2015-01-01T23:59:59.000Z

399

Electromagnetically induced transparency and dark fluorescence in a cascade three-level diatomic lithium system  

Science Journals Connector (OSTI)

Following our previous brief report [Phys. Rev. Lett. 88, 173003 (2002)], we report here a detailed study of electromagnetically induced transparency (EIT) and dark fluorescence in a cascade three-level diatomic lithium system using optical-optical double resonance (OODR) spectroscopy for both resonance and off resonance coupling. When a strong coupling laser couples the intermediate state A?u+1(v=13,J=14) to the upper state G?g1(v=11,J=14) of Li27, the fluorescence from both A?u+1 and G?g1 states was drastically reduced as the weak probe laser was tuned through the resonance transition between the ground state X?g+1(v=4,J=15) and the excited state A?u+1(v=13,J=14). The strong coupling laser makes an optically thick medium transparent for the probe transition. In addition, the fact that fluorescence from the upper state G?g1(v=11,J=14) was also dark when both lasers were tuned at resonance implies that the molecules were trapped in the ground state. We used density matrix methods to simulate the response of an open molecular three-level system to the action of a strong coupling field and a weak probe field. The analytical solutions were obtained under the steady-state condition. We have incorporated the magnetic sublevel (M) degeneracy of the rotational levels in the line shape analysis and report ?M? dependent line shape splitting. Our theoretical calculations are in excellent agreement with the observed fluorescence spectra. We show that the coherence is remarkably preserved even when the coupling field was detuned far from the resonance.

Jianbing Qi and A. Marjatta Lyyra

2006-04-19T23:59:59.000Z

400

Quantitative Modeling and Estimation in Systems Biology using Fluorescent Reporter Systems  

E-Print Network (OSTI)

) Fluorescence intensity profile obtained for IL-6-STAT3 system ............. 45 9. Estimated STAT3 profiles from Tikhonov regularization and truncated SVD ........ 47 10. Illustration for choosing the excitation wavelength for a mixture containing CFP and GFP... (data obtained from an online database (Biosciences, 2000) for CFP and GFP variants that have maximum emission and excitation wavelengths reasonably close to pAmCyan and pCM18 protein plasmids, respectively...

Bansal, Loveleena

2013-12-10T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Through Skull Fluorescence Imaging of the Brain in a New Near-Infrared Window  

E-Print Network (OSTI)

To date, brain imaging has largely relied on X-ray computed tomography and magnetic resonance angiography with limited spatial resolution and long scanning times. Fluorescence-based brain imaging in the visible and traditional near-infrared regions (400-900 nm) is an alternative but currently requires craniotomy, cranial windows and skull thinning techniques, and the penetration depth is limited to 1-2 mm due to light scattering. Here, we report through-scalp and through-skull fluorescence imaging of mouse cerebral vasculature without craniotomy utilizing the intrinsic photoluminescence of single-walled carbon nanotubes in the 1.3-1.4 micrometre near-infrared window. Reduced photon scattering in this spectral region allows fluorescence imaging reaching a depth of >2 mm in mouse brain with sub-10 micrometre resolution. An imaging rate of ~5.3 frames/s allows for dynamic recording of blood perfusion in the cerebral vessels with sufficient temporal resolution, providing real-time assessment of blood flow anomaly...

Hong, Guosong; Chang, Junlei; Antaris, Alexander L; Chen, Changxin; Zhang, Bo; Zhao, Su; Atochin, Dmitriy N; Huang, Paul L; Andreasson, Katrin I; Kuo, Calvin J; Dai, Hongjie

2014-01-01T23:59:59.000Z

402

Spatial assessment of net mercury emissions from the use of fluorescent bulbs  

SciTech Connect

While fluorescent lighting is an important technology for reducing electrical energy demand, mercury used in the bulbs is an ongoing concern. Using state and country level data, net emissions of mercury from the marginal use of fluorescent lightbulbs are examined for a base year of 2004 for each of the 50 United States and 130 countries. Combustion of coal for electric power generation is generally the largest source of atmospheric mercury pollution; reduction in electricity demand from the substitution of incandescent bulbs with fluorescents leads to reduced mercury emissions during the use of the bulb. This analysis considers the local mix of power sources, coal quality, thermal conversion efficiencies, distribution losses, and any mercury control technologies that might be in place. Emissions of mercury from production and end-of-life treatment of the bulbs are also considered, providing a life-cycle perspective. Net reductions in mercury over the entire life cycle range from -1.2 to 97 mg per bulb depending on the country. The consequences for atmospheric mercury emissions of several policy scenarios are also discussed. 46 refs., 4 figs., 3 tabs.

Matthew J. Eckelman; Paul T. Anastas; Julie B. Zimmerman [Yale University, New Haven, CT (United States). Department of Chemical Engineering

2008-11-15T23:59:59.000Z

403

H_2 Absorption and Fluorescence for Gamma Ray Bursts in Molecular Clouds  

E-Print Network (OSTI)

If a gamma ray burst with strong UV emission occurs in a molecular cloud, there will be observable consequences resulting from excitation of the surrounding H2. The UV pulse from the GRB will pump H2 into vibrationally-excited levels which produce strong absorption at wavelengths < 1650 A. As a result, both the prompt flash and later afterglow will exhibit strong absorption shortward of 1650 A, with specific spectroscopic features. Such a cutoff in the emission from GRB 980329 may already have been observed by Fruchter et al.; if so, GRB 980329 was at redshift 3.0 < z < 4.4 . BVRI photometry of GRB 990510 could also be explained by H2 absorption if GRB 990510 is at redshift 1.6 < z < 2.3. The fluorescence accompanying the UV pumping of the H2 will result in UV emission from the GRB which can extend over days or months, depending on parameters of the ambient medium and beaming of the GRB flash. The 7.5-13.6 eV fluorescent luminosity is \\sim 10^{41.7} erg/s for standard estimates of the parameters of the GRB and the ambient medium. Spectroscopy can distinguish this fluorescent emission from other possible sources of transient optical emission, such as a supernova.

B. T. Draine

1999-07-16T23:59:59.000Z

404

A comparative study on the stability and structure of two different green fluorescent proteins in organic co-solvent systems  

Science Journals Connector (OSTI)

Green fluorescent protein (GFP) has been used ... requires the stability of GFP in organic co-solvent systems. This prompted us to examine the ... stability, under a range of organic co-solvent systems. n-GFP and...

Govindan Raghunathan; Sriram Sokalingam…

2013-04-01T23:59:59.000Z

405

Analysis of Na and Ba in an atomic fluorescence method with excitation by a pulsed dye laser with lamp pumping  

SciTech Connect

Among the laser methods used in atomic spectroscopy, atomic fluorescence resonance spectroscopy together with an atomic ionization technique make it possible to work with individual atoms. This paper reports on the determination of Na and Ba in aqueous solutions of their salts with atomic fluorescence analysis performed wih a dye laser and lamp pumping, the pulse of generation having a length of 1-2 usec. The detection limit of elements in atomic fluorescence analysis performed wih dye lasers with lamp pumping can be reduced by increasing the spectral density of the laser radiation through narrowing the line of generation, by employing other dyes to excite lines of greater intensity, by improving the recording system of the fluorescence spectra, and by improving the atomization of the samples to be analyzed.

Kukvshim, V.G.

1986-04-01T23:59:59.000Z

406

Polyhalogenated hydrocarbon refrigerants and refrigerant oils colored with fluorescent dyes and method for their use as leak detectors  

SciTech Connect

A leak detectable refrigeration composition is described comprising: (A) a refrigeration liquid selection from the group consisting of: (1) a polyhalogenated hydrocarbon refrigerant; (2) a refrigeration oil selected from the group consisting of naphthenic oils, paraffinic oils, alkylated benzenes, silicones, polyglycols, diesters or triesters of dicarboxylic or tricarboxylic acids, and polyalkyl silicate oils, and (3) a mixture of A(1) and A(2), and (B) a fluorescent dye compound or composition comprising the dye selected from the group consisting of: (1) a fluorescent dye selected from the group consisting of perylene, naphthoxanthene, monocyclic aromatic compounds having an organometallic compound, (2) a solution of fluorescent dye in a solvent, and (3) a mixture of B(1) and B(2). The fluorescent dye compound or composition is soluble in the refrigeration liquid. The concentration of the dye being at least 0.001 grams per 100 grams of the refrigeration liquid.

Parekh, M.

1988-07-19T23:59:59.000Z

407

Early Events in the Fusarium verticillioides-Maize Interaction Characterized by Using a Green Fluorescent Protein-Expressing Transgenic Isolate  

Science Journals Connector (OSTI)

...common maize fungi. Cereal Res. Commun. 25...grown from infected seeds. Plant Dis. 81...Fusarium pathosystem. Cereal Res. Commun. 25...Institute for Cereal Crop Improvement...Proteins genetics metabolism Microscopy, Fluorescence...Roots microbiology Seeds microbiology Transgenes...

Liat Oren; Smadar Ezrati; David Cohen; Amir Sharon

2003-03-01T23:59:59.000Z

408

Study of the correlation between the coal calorific value and coal ash content using X-ray fluorescence analysis  

Science Journals Connector (OSTI)

In this paper we have studied the possibility of determining the chemical elements in coal samples using X-ray fluorescence analysis and have found a relationship between the coal calorific value and its ash cont...

D. Bolortuya; P. Zuzaan; M. V. Gustova…

2013-12-01T23:59:59.000Z

409

Energy transfer to a proton-transfer fluorescence probe: Tryptophan to a flavonol in human serum?albumin  

Science Journals Connector (OSTI)

...important targets in situ. For example, flavonols (3-HF, fisetin...IT>in situ. For example, flavonols (3-HF, fisetin, and quercetin) can be used as biologically active fluorescence...

Alexander Sytnik; Igor Litvinyuk

1996-01-01T23:59:59.000Z

410

Probing Ag nanoparticle surface oxidation in contact with (in)organics: an X-ray scattering and fluorescence yield approach  

Science Journals Connector (OSTI)

An advanced characterization approach to spatially resolve the reactions occurring at the interface between silver nanoparticles and a simple aqueous system is presented. Both phase and chemical distributions were obtained from X-ray scattering and fluorescence yield techniques.

Levard, C.

2011-10-06T23:59:59.000Z

411

Micromolding of a Highly Fluorescent Reticular Coordination Polymer: Solvent-Mediated Reconfigurable Polymerization in a Soft Lithographic Mold  

SciTech Connect

Coordination polymerization of pyridine-based ligands and zinc or silver ions was controlled by soft lithographic micromolding in capillaries. The polymer patterns that are produced are highly fluorescent and supramolecularly structured.

Y You; H Yang; J Chung; J Kim; Y Jung; S Park

2011-12-31T23:59:59.000Z

412

Serum proteins, indirect fluorescent antibody titers and complement fixing antibody titers in dexamethasone exacerbated anaplasmosis carrier calves  

E-Print Network (OSTI)

SERUM PROTEINS, INDIRECT FLUORESCENT ANTIBODY TITERS AND COMPLEMENT FIXING ANTIBODY TITERS IN DEXAMETHASONE EXACERBATED ANAPLASMOSIS CARRIER CALVES A Thesis by Lloran Wesley Johnson Submitted to the Graduate College of Texas A%M University... in partial fulfillment of the requirement for the degree of MAS TER 0 F SC I ENC E August 1979 Major Subject: Veterinary Microbiology SERUM PROTEINS, INDIRECT FLUORESCENT ANTIBODY TITERS AND COMPLEMENT FIXING ANTIBODY TITERS IN DEXAMETHASONE EXACERBATED...

Johnson, Lloran Wesley

2012-06-07T23:59:59.000Z

413

Anaheim Public Utilities - Small Business Energy Management Assistance  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Anaheim Public Utilities - Small Business Energy Management Anaheim Public Utilities - Small Business Energy Management Assistance Program Anaheim Public Utilities - Small Business Energy Management Assistance Program < Back Eligibility Commercial Savings Category Heating & Cooling Commercial Heating & Cooling Cooling Appliances & Electronics Commercial Lighting Lighting Maximum Rebate T8 Fluorescent lights, electronic ballasts and controls: 5,000 Programmable thermostats: 800 Program Info State California Program Type Utility Rebate Program Rebate Amount T8 Fluorescent lights, electronic ballasts and controls: 75% of the cost Refrigeration and A/C tune-up: free Programmable thermostats: free Expert energy survey: free Provider Anaheim Public Utilities The Small Business Energy Management System Program provides participating

414

EA-0819: Final Environmental Assessment | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

819: Final Environmental Assessment 819: Final Environmental Assessment EA-0819: Final Environmental Assessment Proposed Energy Conservation Standards for Eight Types of Consumer Products: Room Air Conditioners, Water Heaters, Direct Heating Equipment, Mobile Home Furnaces, Ranges and Ovens, Pool Heaters, Fluorescent Ballasts, and Television Sets This Environmental Assessment (EA) on the candidate energy conservation standards for eight appliances (room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts, and television sets) was prepared pursuant to the National Environmental Policy Act of 1969 (NEPA), regulations of the Council on Environmental Quality, Title 40, Code of Federal Regulations, Parts 1500 through 1508. The candidate conservation

415

Influence of conformational changes in complex molecules on photon statistics of single molecule fluorescence  

SciTech Connect

A single complex molecule with conformational changes (conformations 0 and 2) is considered. When such a molecule is irradiated by cw-laser light it can randomly change the intensity or polarization of its fluorescence due to jumps from one conformation to another. In fact, the molecule manifests itself either like the 0-type or the 2-type emitter. An expression for the matrix s{sub {alpha}{beta}}(t) called the start-stop correlator (waiting time distribution) in which {alpha}=0,2 and {beta}=0,2 is derived. An expression for the matrix p{sub {alpha}{beta}}(t) called the full correlator is derived as well. It determines the density of the probability of finding an event of {alpha} type and an event of {beta} type separated by time interval t. A relation between matrices s{sub {alpha}{beta}}(t) and p{sub {alpha}{beta}}(t) is found. A mathematical expression for the distribution w{sub N}(T) of events measured in time interval T is derived. It is expressed solely via the matrix s{sub {alpha}{beta}}(t). Numerical calculations of the event distribution function for various rates of intra- and interconformational jumps are carried out with the help of the formula for w{sub N}(T) and by the Monte Carlo method. Both methods of the calculation yield identical distributions. Fluctuating fluorescence intensity I(t) for a bin time of 5 ms is calculated for slow and fast interconformational jumps. A relation is found between the autocorrelation function g{sup (2)}(t) of fluorescence measurable in experiments and the matrix p{sub {alpha}{beta}}(t) calculated theoretically.

Osad'ko, I. S. [Institute of Spectroscopy Russian Academy of Sciences (RAS), 142190 Troitsk, Moscow Region (Russian Federation); Moscow Pedagogical State University, 119991 Moscow (Russian Federation); Fedyanin, V. V. [Moscow Pedagogical State University, 119991 Moscow (Russian Federation)

2011-06-15T23:59:59.000Z

416

High resolution x-ray fluorescence spectroscopy - a new technique for site- and spin-selectivity  

SciTech Connect

X-ray spectroscopy has long been used to elucidate electronic and structural information of molecules. One of the weaknesses of x-ray absorption is its sensitivity to all of the atoms of a particular element in a sample. Through out this thesis, a new technique for enhancing the site- and spin-selectivity of the x-ray absorption has been developed. By high resolution fluorescence detection, the chemical sensitivity of K emission spectra can be used to identify oxidation and spin states; it can also be used to facilitate site-selective X-ray Absorption Near Edge Structure (XANES) and site-selective Extended X-ray Absorption Fine Structure (EXAFS). The spin polarization in K fluorescence could be used to generate spin selective XANES or spin-polarized EXAFS, which provides a new measure of the spin density, or the nature of magnetic neighboring atoms. Finally, dramatic line-sharpening effects by the combination of absorption and emission processes allow observation of structure that is normally unobservable. All these unique characters can enormously simplify a complex x-ray spectrum. Applications of this novel technique have generated information from various transition-metal model compounds to metalloproteins. The absorption and emission spectra by high resolution fluorescence detection are interdependent. The ligand field multiplet model has been used for the analysis of K{alpha} and K{beta} emission spectra. First demonstration on different chemical states of Fe compounds has shown the applicability of site selectivity and spin polarization. Different interatomic distances of the same element in different chemical forms have been detected using site-selective EXAFS.

Wang, Xin [Univ. of California, Davis, CA (United States). Dept. of Applied Science]|[Lawrence Berkeley National Lab., CA (United States)

1996-12-01T23:59:59.000Z

417

Development of an Ion-Sensor using Fluorescence Resonance Energy Transfer  

E-Print Network (OSTI)

A method is presented for the sensing of ions by determining the concentration of corresponding salts (KCl, NaCl, MgCl2, CaCl2, FeCl3, FeSO4, AlCl3) in water, based on Fluorescence resonance energy transfer (FRET) process. The principle of the proposed sensor is based on the change of FRET efficiency between two laser dyes Acriflavine and Rhodamine B in presence of different ions (K+, Na+, Mg2+, Ca2+, Fe2+, Fe3+, Al3+). Nanodimensional clay platelet laponite was used to enhance the efficiency of the sensor.

Dey, Dibyendu; Bhattacharjee, D; Hussain, Syed Arshad

2014-01-01T23:59:59.000Z

418

In-Situ Silver Acetylide Silver Nitrate Explosive Deposition Measurements Using X-Ray Fluorescence.  

SciTech Connect

The Light Initiated High Explosive facility utilized a spray deposited coating of silver acetylide - silver nitrate explosive to impart a mechanical shock into targets of interest. A diagnostic was required to measure the explosive deposition in - situ. An X - ray fluorescence spectrometer was deployed at the facility. A measurement methodology was developed to measure the explosive quantity with sufficient accuracy. Through the use of a tin reference material under the silver based explosive, a field calibration relationship has been developed with a standard deviation of 3.2 % . The effect of the inserted tin material into the experiment configuration has been explored.

Covert, Timothy T.

2014-09-01T23:59:59.000Z

419

Glass transition of associated solvents studied by fluorescence measurement of doped chromophores  

Science Journals Connector (OSTI)

The fluorescence lifetime of a triphenylmethane dye, malachite green, doped in three glass-forming associated solvents, 1-propanol, propylene glycol, and glycerol, was measured in a wide temperature range. For each sample three temperature regimes were found in the temperature dependence of the nonradiative relaxation time of malachite green. The lower crossover temperature corresponds to the calorimetric glass transition temperature, and the higher one, 30–50 K above the lower one, is attributed to the critical temperature that is predicted by mode-coupling theory. © 1996 The American Physical Society.

Jing Yong Ye; Toshiaki Hattori; Hideyuki Inouye; Hiroshi Ueta; Hiroki Nakatsuka; Yoshihiro Maruyama; Mitsuru Ishikawa

1996-04-01T23:59:59.000Z

420

A two-photon fluorescence autocorrelator for a Nd:YLF modelocked laser  

SciTech Connect

In this thesis, I discuss the design and implementation of an autocorrelator for an actively modelocked ND:YLF laser at wavelength 1.054{mu}m. A dye is used to generate a broadband two-photon fluorescence (TPF) signal at 570nm which is the autocorrelation of the laser pulses. Two different techniques are discussed. A colliding pulse scheme can be used to generate a TPF autocorrelation signal as a function of distance, or an interferometer technique can be used to generate an autocorrelation signal as a function of the delay in an interferometer arm. Experimental results are discussed, but they are inconclusive because of difficulties in interpreting the signal.

Kner, P.A.

1991-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Compact Fluorescent Lighting in America: Lessons Learned on the Way to Market  

SciTech Connect

This report describes the history of compact fluorescent lamps (CFLs) in America. CFLs were introduced in the 1970s; however, it has taken more than 20 years for them to gain widespread recognition in the U.S. residential lighting market. This report reviews the development of CFLs, efforts to increase market acceptance of them, and barriers to that acceptance. Lessons to be learned from this study of CFLs are identified in hopes of assisting future market introduction efforts for other promising energy-efficient technologies. This report was prepared by the Pacific Northwest National Laboratory for the U.S. Department of Energy’s Office of Building Technologies, Emerging Technologies Program.

Sandahl, Linda J.; Gilbride, Theresa L.; Ledbetter, Marc R.; Steward, Heidi E.; Calwell, Chris

2006-05-22T23:59:59.000Z

422

Fluorescence emission as a probe to investigate electrochemical polymerization of 9-vinylanthracene  

SciTech Connect

The cationic polymerization of 9-vinylanthracene can be initiated at a transparent SnO/sub 2/ electrode with the application of anodic potentials (E > 1.1 V vs. saturated sodium chloride calomel electrode) in acetonitrile solutions. The excimer emission (emission maximum approx.500 nm) of poly(9-vinyl-anthracene) which is distinguishable from the monomer fluorescence emission (emission maxima 410, 430 nm) has been used to probe the electrochemical polymerization process directly. The in situ spectroelectrochemical technique, which would be useful in obtaining kinetic and mechanistic information of the electropolymerization process, is described.

Kamat, P.V.

1987-07-01T23:59:59.000Z

423

The convergence of quantum-dot-mediated fluorescence resonance energy transfer and  

Science Journals Connector (OSTI)

We present a novel convergence of quantum-dot-mediated fluorescence resonance energy transfer (QD-FRET) and microfluidics, through which molecular interactions were precisely controlled and monitored using highly sensitive quantum-dot-mediated FRET. We demonstrate its potential in studying the kinetics of self-assembly of DNA polyplexes under laminar flow in real time with millisecond resolution. The integration of nanophotonics and microfluidics offers a powerful tool for elucidating the formation of polyelectrolyte polyplexes, which is expected to provide better control and synthesis of uniform and customizable polyplexes for future nucleic acid-based therapeutics.

Yi-Ping Ho; Hunter H Chen; Kam W Leong; Tza-Huei Wang

2009-01-01T23:59:59.000Z

424

The Multiply Scattering Effect on the Energy Measurement of UHE Cosmic Rays using Atmospheric Fluorescence Technique  

E-Print Network (OSTI)

Point sources in the atmosphere are surrounded by aureole because of atmospheric scattering. The properties of the time-dependent aureole radiance are calculated by use of a Monte Carlo approach and an iterative method. Since the aureole is particularly important in the ultraviolet, which is the region the Ultra-High-Energy (UHE) cosmic ray experiment using the air fluorescence technique like Fly's Eye or High-Resolution-Fly's-Eye(HiRes) are set in. The effect of the multiply scatteing on the energy measurement is studied.

Xingzhi Zhang

2000-04-12T23:59:59.000Z

425

Fluorescent Single-Walled Carbon Nanotube Aerogels in Surfactant-free Environments  

Science Journals Connector (OSTI)

†Physical Chemistry and Applied Spectroscopy Group, Chemistry Division, ‡Center for Integrated Nanotechnologies, Materials Physics and Applications Division, §Polymers and Coatings Group, Materials Science and Technology Division, and ?National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos New Mexico 87545, United States ... single-walled carbon nanotube; fluorescence; surfactant-free; silica aerogel; nanocomposite; low-temperature ... Thus, during gelation the silica precursor molecules can penetrate the SDS assembly more readily than the DOC coating resulting in weaker PL intensities for the SDS-suspended tubes in contrast to DOC-wrapped tubes. ...

Juan G. Duque; Christopher E. Hamilton; Gautam Gupta; Scott A. Crooker; Jared. J. Crochet; Aditya Mohite; Han Htoon; Kimberly A. DeFriend Obrey; Andrew M. Dattelbaum; Stephen K. Doorn

2011-07-26T23:59:59.000Z

426

A Graphene Oxide-Based Fluorescent Biosensor for the Analysis of Peptide–Receptor Interactions and Imaging in Somatostatin Receptor Subtype 2 Overexpressed Tumor Cells  

Science Journals Connector (OSTI)

Interestingly, the specific binding of the antibody anti-octreotide (AOC) with FOC competitively releases FOC from the GO surface, leading to the recovery of fluorescence. ... By using this GO-based fluorescent platform, we can detect AOC with a low detection limit of 2 ng/mL. ... The interaction between FOC and its antibody, anti-octreotide (AOC), was investigated with the fluorescence emission spectra of FOC in the presence of AOC. ...

Feng Bianying; Guo Linjie; Wang Lihua; Li Fan; Lu Jianxin; Gao Jimin; Fan Chunhai; Huang Qing

2013-07-18T23:59:59.000Z

427

References : Appendices : From the Lab to the Marketplace-Ten Years Later  

NLE Websites -- All DOE Office Websites (Extended Search)

References References From the Lab to the Marketplace Ten Years Later, Energy Efficient Technologies from Research at the Lawrence Berkeley National Laboratory Berkeley Lab logo (left) with six rows of gray dots transitioning to a line art drawing of a cityscape and residential houses. References General Lawrence Berkeley National Laboratory. From the Lab to the Marketplace: Making America's Buildings More Energy-Efficient. PUB-758, Revised March 1995. National Research Council. Energy Research at DOE: Was It Worth It? National Academy Press, Washington D.C., 2001. Lighting Ballasts Verderber, R.R. Electronic High Frequency Fluorescent Ballasts (Past, Present and Future). Energy Cost Avoidance in Education Buildings Conference, LBL-28792, 1990. Verderber, R.R. Fluorescent Lamp Fixtures and Ballasts. EPRI Lighting and

428

DEPARTMENT OF ENERGY  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

[6450-01-P] [6450-01-P] DEPARTMENT OF ENERGY 10 CFR Part 430 [Docket Number EERE-2007-BT-STD-0016] RIN 1904-AB50 Energy Conservation Program: Energy Conservation Standards for Fluorescent Lamp Ballasts AGENCY: Office of Energy Efficiency and Renewable Energy, Department of Energy. ACTION: Finding of No Significant Impact: Energy Conservation Program. SUMMARY: The Energy Policy and Conservation Act of 1975 (EPCA), as amended, prescribes energy conservation standards for various consumer products and certain commercial and industrial equipment, including fluorescent lamp ballasts (hereafter referred to as ballasts). EPCA also requires the U.S. Department of Energy (DOE) to determine whether more-stringent standards would be technologically feasible and economically justified, and would save a

429

Fluorescence-detected assembly of the signal recognition particle: binding of the two SRP protein heterodimers to SRP RNA is noncooperative  

Science Journals Connector (OSTI)

Fluorescence-detected assembly of the signal recognition particle: binding of the two SRP protein heterodimers to SRP RNA is noncooperative ...

Fabiola Janiak; Peter Walter; Arthur E. Johnson

1992-06-01T23:59:59.000Z

430

High Repetition Rate, LINAC-based Nuclear Resonance Fluorescence FY 2009 Final Report  

SciTech Connect

Nuclear Resonance Fluorescence (NRF), which is possible for nuclei with atomic numbers greater than helium (Z=2), occurs when a nuclear level is excited by resonant absorption of a photon and subsequently decays by reemission of a photon. The excited nuclear states can become readily populated, provided the incident photon’s energy is within the Doppler-broadened width of the energy level being excited. Utilizing continuous energy photon spectra, as is characteristic of a bremsstrahlung photon beam, as the inspection source, ensures that at least some fraction of the impinging beam will contribute to the population of the excited energy levels in the material of interest. Upon de-excitation, either to the ground state or to a lower-energy excited state, the emitted fluorescence photon’s energy will correspond to the energy difference between the excited state and the state to which it decays. As each isotope inherently contains unique nuclear energy levels, the NRF states for each isotope are also unique. By exploiting this phenomenon, NRF photon detection provides a well-defined signature for identifying the presence of individual nuclear species. This report summarizes the second year (Fiscal Year [FY] 2009) of a collaborative research effort between Idaho National Laboratory, Idaho State University’s Idaho Accelerator Center, and Pacific Northwest National Laboratory. This effort focused on continuing to assess and optimize NRF-based detection techniques utilizing a slightly modified, commercially available, pulsed medical electron accelerator.

Mathew Kinlaw; Scott Watson; James Johnson; Alan Hunt; Heather Seipel; Edward Reedy

2009-10-01T23:59:59.000Z

431

3D optical sectioning with a new hyperspectral confocal fluorescence imaging system.  

SciTech Connect

A novel hyperspectral fluorescence microscope for high-resolution 3D optical sectioning of cells and other structures has been designed, constructed, and used to investigate a number of different problems. We have significantly extended new multivariate curve resolution (MCR) data analysis methods to deconvolve the hyperspectral image data and to rapidly extract quantitative 3D concentration distribution maps of all emitting species. The imaging system has many advantages over current confocal imaging systems including simultaneous monitoring of numerous highly overlapped fluorophores, immunity to autofluorescence or impurity fluorescence, enhanced sensitivity, and dramatically improved accuracy, reliability, and dynamic range. Efficient data compression in the spectral dimension has allowed personal computers to perform quantitative analysis of hyperspectral images of large size without loss of image quality. We have also developed and tested software to perform analysis of time resolved hyperspectral images using trilinear multivariate analysis methods. The new imaging system is an enabling technology for numerous applications including (1) 3D composition mapping analysis of multicomponent processes occurring during host-pathogen interactions, (2) monitoring microfluidic processes, (3) imaging of molecular motors and (4) understanding photosynthetic processes in wild type and mutant Synechocystis cyanobacteria.

Nieman, Linda T.; Sinclair, Michael B.; Davidson, George S.; Van Benthem, Mark Hilary; Haaland, David Michael; Timlin, Jerilyn Ann; Sasaki, Darryl Yoshio; Bachand, George David; Jones, Howland D. T.

2007-02-01T23:59:59.000Z

432

Status of the Silicon Photomultiplier Telescope FAMOUS for the Fluorescence Detection of UHECRs  

E-Print Network (OSTI)

An established technique for the measurement of ultra-high-energy-cosmic-rays is the detection of the fluorescence light induced in the atmosphere of the Earth, by means of telescopes equipped with photomultiplier tubes. Silicon photomultipliers (SiPMs) promise an increase in the photon detection efficiency which outperforms conventional photomultiplier tubes. In combination with their compact package, a moderate bias voltage of several ten volt and single photon resolution, the use of SiPMs can improve the energy and spatial resolution of air fluorescence measurements, and lead to a gain in information on the primary particle. Though, drawbacks like a high dark-noise-rate and a strong temperature dependency have to be managed. FAMOUS is a refracting telescope prototype instrumented with 64 SiPMs of which the main optical element is a Fresnel lens of 549.7 mm diameter and 502.1 mm focal length. The sensitive area of the SiPMs is increased by a special light collection system consisting of Winston cones. The t...

Niggemann, Tim; Brogueira, Pedro; Bueno, Antonio; Eichler, Hans Michael; Ferreira, Miguel; Hebbeker, Thomas; Lauscher, Markus; Mendes, Luís; Middendorf, Lukas; Navas, Sergio; Peters, Christine; Pimenta, Mário; Ruiz, Angel; Schumacher, Johannes; Stephan, Maurice

2015-01-01T23:59:59.000Z

433

Laser induced coal fluorescence. Tenth quarterly technical progress report, January 1-March 31, 1985  

SciTech Connect

The work performed during this period consisted of the completion of time resolved data acquisition and reduction of New Albany shale rank series, preliminary testing of a new deconvolution method, and the writing of additional software. The data acquisition consisted of 21 decay curves, one taken every 10nm over the fluorescence emission range of 450 to 650nm for each alginite maceral investigated. Approximately five alginite macerals were examined from each of the thirteen samples making a total of 61 macerals (1281 decay curves). The decay data were deconvoluted, resulting in decay times and percentages of fluorescing compounds as a function of wavelength. Because of the massive amount of data we are able to collect in a relatively short time and the fact that the current iterative deconvolution method requires a relatively large amount of time, it became imperative that a new deconvolution method be investigated. The new method was suggested by Dr. Robert Zitter, and, for the purpose of this report, is tentatively named the ''Zitter Method.'' The software written during this period consisted primarily of additional data storage and presentation routines. 14 figs., 2 tabs.

Borst, W.L.

1985-01-01T23:59:59.000Z

434

Validation of the Real and Simulated Data of the Pierre Auger Fluorescence Telescopes  

E-Print Network (OSTI)

The fluorescence detector (FD) of the Pierre Auger Observatory is currently operating 18 fluorescence telescopes of the 24 that will be employed in the completed detector. These telescopes, grouped in 4 eyes each consisting of 6 telescopes, measure the longitudinal profile of cosmic ray showers with a 14% duty cycle. The reconstruction capability and triggering efficiency have been studied using a complete simulation and reconstruction production chain, employing both simulated CORSIKA showers and parameterised Gaisser-Hillas profiles. The propagation through the atmosphere and the detector response are taken into account and simulated in detail. These simulated data have been generated in a preliminary analysis using the method of importance sampling to efficiently cover the energy region of 0.3 - 300 EeV, various shower geometries and impact points and different primary particles. The distributions of observables have then been investigated in both real and simulated data, facilitating the validation of the reconstruction and simulation software. Comparisons of real and simulated data are discussed and used to assess their impact on the data analysis.

The Pierre Auger Collaboration; L. Perrone

2005-07-20T23:59:59.000Z

435

Fluorescent protein pair emit intracellular FRET signal suitable for FACS screening  

SciTech Connect

The fluorescent proteins ECFP and HcRed were shown to give an easily resolved FRET-signal when expressed as a fusion inside mammalian cells. HeLa-tat cells expressing ECFP, pHcRed, or the fusion protein pHcRed-ECFP were analyzed by flow cytometry after excitation of ECFP. Cells expressing HcRed-ECFP, or ECFP and HcRed, were mixed and FACS-sorted for FRET positive cells: HcRed-ECFP cells were greatly enriched (72 times). Next, cloned human antibodies were fused with ECFP and expressed anchored to the ER membrane. Their cognate antigens (HIV-1 gp120 or gp41) were fused to HcRed and co-expressed in the ER. An increase of 13.5 {+-} 1.5% (mean {+-} SEM) and 8.0 {+-} 0.7% in ECFP fluorescence for the specific antibodies reacting with gp120 or gp41, respectively, was noted after photobleaching. A positive control (HcRed-ECFP) gave a 14.8 {+-} 2.6% increase. Surprisingly, the unspecific antibody (anti-TT) showed 12.1 {+-} 1.1% increase, possibly because overexpression in the limited ER compartment gave false FRET signals.

Johansson, Daniel X. [Karolinska Institutet, Department of Medicine, Karolinska Hospital, 171 76 Stockholm (Sweden); Brismar, Hjalmar [Karolinska Institutet, Department of Woman and Child Health, Karolinska Hospital, 171 76 Stockholm (Sweden); Royal Institute of Technology, Department of Cell Physics, KTH/SCFAB, 106 91 Stockholm (Sweden); Persson, Mats A.A. [Karolinska Institutet, Department of Medicine, Karolinska Hospital, 171 76 Stockholm (Sweden)]. E-mail: mats.persson@ki.se

2007-01-12T23:59:59.000Z

436

Isotopic imaging via nuclear resonance fluorescence with laser-based Thomson radiation  

DOE Patents (OSTI)

The present invention utilizes novel laser-based, high-brightness, high-spatial-resolution, pencil-beam sources of spectrally pure hard x-ray and gamma-ray radiation to induce resonant scattering in specific nuclei, i.e., nuclear resonance fluorescence. By monitoring such fluorescence as a function of beam position, it is possible to image in either two dimensions or three dimensions, the position and concentration of individual isotopes in a specific material configuration. Such methods of the present invention material identification, spatial resolution of material location and ability to locate and identify materials shielded by other materials, such as, for example, behind a lead wall. The foundation of the present invention is the generation of quasimonochromatic high-energy x-ray (100's of keV) and gamma-ray (greater than about 1 MeV) radiation via the collision of intense laser pulses from relativistic electrons. Such a process as utilized herein, i.e., Thomson scattering or inverse-Compton scattering, produces beams having diameters from about 1 micron to about 100 microns of high-energy photons with a bandwidth of .DELTA.E/E of approximately 10E.sup.-3.

Barty, Christopher P. J. (Hayward, CA); Hartemann, Frederic V. (San Ramon, CA); McNabb, Dennis P. (Alameda, CA); Pruet, Jason A. (Brentwood, CA)

2009-07-21T23:59:59.000Z

437

A high-resolution large-acceptance analyzer for X-ray fluorescence and Raman spectroscopy  

SciTech Connect

A newly designed multi-crystal X-ray spectrometer and its applications in the fields of X-ray fluorescence and X-ray Raman spectroscopy are described. The instrument is based on 8 spherically curved Si crystals, each with a 3.5 inch diameter form bent to a radius of 86 cm. The crystals are individually aligned in the Rowland geometry capturing a total solid angle of 0.07 sr. The array is arranged in a way that energy scans can be performed by moving the whole instrument, rather than scanning each crystal by itself. At angles close to back scattering the energy resolution is between 0.3 and 1 eV depending on the beam dimensions at the sample. The instrument is mainly designed for X-ray absorption and fluorescence spectroscopy of transition metals in dilute systems such as metalloproteins. First results of the Mn K{beta} (3p -> 1s) emission in photosystem II are shown. An independent application of the instrument is the technique of X-ray Raman spectroscopy which can address problems similar to those in traditional soft X-ray absorption spectroscopies, and initial results are presented.

Bergmann, Uwe; Cramer, Stephen P.

2001-08-02T23:59:59.000Z

438

Laser-Induced Fluorescence Detection in High-Throughput Screening of Heterogeneous Catalysts and Single Cells Analysis  

SciTech Connect

Laser-induced fluorescence detection is one of the most sensitive detection techniques and it has found enormous applications in various areas. The purpose of this research was to develop detection approaches based on laser-induced fluorescence detection in two different areas, heterogeneous catalysts screening and single cell study. First, the author introduced laser-induced imaging (LIFI) as a high-throughput screening technique for heterogeneous catalysts to explore the use of this high-throughput screening technique in discovery and study of various heterogeneous catalyst systems. This scheme is based on the fact that the creation or the destruction of chemical bonds alters the fluorescence properties of suitably designed molecules. By irradiating the region immediately above the catalytic surface with a laser, the fluorescence intensity of a selected product or reactant can be imaged by a charge-coupled device (CCD) camera to follow the catalytic activity as a function of time and space. By screening the catalytic activity of vanadium pentoxide catalysts in oxidation of naphthalene, they demonstrated LIFI has good detection performance and the spatial and temporal resolution needed for high-throughput screening of heterogeneous catalysts. The sample packing density can reach up to 250 x 250 subunits/cm{sup 2} for 40-{micro}m wells. This experimental set-up also can screen solid catalysts via near infrared thermography detection. In the second part of this dissertation, the author used laser-induced native fluorescence coupled with capillary electrophoresis (LINF-CE) and microscope imaging to study the single cell degranulation. On the basis of good temporal correlation with events observed through an optical microscope, they have identified individual peaks in the fluorescence electropherograms as serotonin released from the granular core on contact with the surrounding fluid.

Hui Su

2001-05-25T23:59:59.000Z

439

Cold Fluorescent Light as Major Inducer of Lipid Oxidation in Soybean Oil Stored at Household Conditions for Eight Weeks  

Science Journals Connector (OSTI)

Soybean oil stored in the dark for 56 days showed an increase of the peroxide value by 124 ± 0.62% (p = 0.006), whereas exposure of the oil to light in a cycle of 12 h light alternating with 12 h darkness for 56 days led to a rise of the peroxide value by 1473 ± 1.79% (p ? 0.001). ... Photosensitized oxidation and autoxidation of vegetable oils lead to the formation of a broad range of oxidation products. ... To investigate the influence of cold fluorescent light, bulbs were chosen that emit electromagnetic irradiation in the cold fluorescent range thereby mimicking the storage condition in a typical household. ...

Marc Pignitter; Klaus Stolze; Stephanie Gartner; Bettina Dumhart; Christiane Stoll; Georg Steiger; Klaus Kraemer; Veronika Somoza

2014-02-18T23:59:59.000Z

440

Potential Environmental Impacts from the Metals in Incandescent, Compact Fluorescent Lamp (CFL), and Light-Emitting Diode (LED) Bulbs  

Science Journals Connector (OSTI)

Artificial lighting systems are transitioning from incandescent to compact fluorescent lamp (CFL) and light-emitting diode (LED) bulbs in response to the U.S. Energy Independence and Security Act and the EU Ecodesign Directive, which leads to energy savings and reduced greenhouse gas emissions. ... The CFLs and LEDs have higher resource depletion and toxicity potentials than the incandescent bulb due primarily to their high aluminum, copper, gold, lead, silver, and zinc. ... mercury pollution; redn. in electricity demand from the substitution of incandescent bulbs with fluorescents leads to reduced mercury emissions during the use of the bulb. ...

Seong-Rin Lim; Daniel Kang; Oladele A. Ogunseitan; Julie M. Schoenung

2012-12-13T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Reversible Self-Assembly of Entrapped Fluorescent Gelators in Polymerized Styrene Gel Matrix: Erasable Thermal Imaging via Recreation of Supramolecular Architectures  

Science Journals Connector (OSTI)

Reversible Self-Assembly of Entrapped Fluorescent Gelators in Polymerized Styrene Gel Matrix: Erasable Thermal Imaging via Recreation of Supramolecular Architectures ... A solvent-vapor-controlled recreation of the self-assembly of a fluorescent organogelator within a polymer matrix and its application in erasable secret documentation has not been reported previously. ...

Sampath Srinivasan; Palathingal A. Babu; Sankarapillai Mahesh; Ayyappanpillai Ajayaghosh

2009-10-01T23:59:59.000Z

442

THE JOURNAL OF CHEMICAL PHYSICS VOLUME 57, NUMBER 3 1 AUGUST 1972 Laser-Induced Fluorescence: A Method to Measure the Internal State Distribution of  

E-Print Network (OSTI)

THE JOURNAL OF CHEMICAL PHYSICS VOLUME 57, NUMBER 3 1 AUGUST 1972 Laser-Induced Fluorescence a pulsed (2-10 nsec duration), tunable dye laser3 passes through the reaction zone. As the wave- length 20 nsec the opening of the electronic gate. The BaO fluorescence rate versus laser wavelength

Zare, Richard N.

443

Detection of Listeria monocytogenes from a Model Food by Fluorescence Resonance Energy Transfer-Based PCR with an Asymmetric Fluorogenic Probe Set  

Science Journals Connector (OSTI)

...Proc. Natl. Acad. Sci. USA 88: 7276-7280. 11 Ivarsson...and detection of DNA based on energy transfer. Nucleic Acids Res...North Carolina 27695-7624, USA. | Evaluation Studies Journal...Probes Fluorescence Resonance Energy Transfer Fluorescent Dyes Heat-Shock...

Kai Koo; Lee-Ann Jaykus

2003-02-01T23:59:59.000Z

444

Cellular Dynamics Visualized in Live Cells in Vitro and in Vivo by Differential Dual-Color Nuclear-Cytoplasmic Fluorescent-Protein Expression  

Science Journals Connector (OSTI)

...Differential Dual-Color Nuclear-Cytoplasmic Fluorescent-Protein...Kanazawa, Ishikawa, Japan; and 4 The Salk Institute...that enables real-time nuclear-cytoplasmic dynamics...fluorescence microscopy. Nuclear Cytoplasmic Dynamics...VT) with a 50-W power supply. Images were...

Norio Yamamoto; Ping Jiang; Meng Yang; Mingxu Xu; Kensuke Yamauchi; Hiroyuki Tsuchiya; Katsuro Tomita; Geoffrey M. Wahl; Abdool R. Moossa; and Robert M. Hoffman

2004-06-15T23:59:59.000Z

445

Ratiometric Analysis of Single-Molecule Fluorescence Resonance Energy Transfer Using Logical Combinations of Threshold Criteria: A Study of 12-mer DNA  

E-Print Network (OSTI)

Ratiometric Analysis of Single-Molecule Fluorescence Resonance Energy Transfer Using LogicalEW United Kingdom ReceiVed: NoVember 5, 1999; In Final Form: March 13, 2000 Single-molecule can be readily distinguished by this single-molecule method. Fluorescence lifetimes and anisotropy

Wallace, Mark

446

Real-Time Proteomics (RTP) by Single Molecule Fluorescence Microscopy Abstract We propose to develop a new technology for live cell gene expression -Protein Synthesis Measurement (PSM).  

E-Print Network (OSTI)

Real-Time Proteomics (RTP) by Single Molecule Fluorescence Microscopy Abstract We propose use single molecule fluorescence resonance energy transfer (smFRET) to obtain a PSM signal from system that will translate a library of C. elegans mRNA messages and the signals produced from single

Kim, Junhyong

447

PhotochemisfvondPhofobiology. 1971 . Vol. 14,pp. 667-682. PergamonPress. Printed in Great Britain FLUORESCENCE INDUCTION IN THE RED ALGA  

E-Print Network (OSTI)

FLUORESCENCE INDUCTION IN THE RED ALGA PORPHYRIDIUM CRUENTUM P. MOHANTY, G. PAPAGEORGIOU* and GOVINDJEE in the red alga Porphyridium cruentum. Both the fast and the slow fluorescence yield changes are affected algae both in the fast (sec) and in the slow (min) region (see Refs. [l-31). Characteristic points

Govindjee

448

X-ray fluorescence observations of the moon by SMART-1/D-CIXS and the first detection of Ti Ka from the lunar surface  

E-Print Network (OSTI)

X-ray fluorescence observations of the moon by SMART-1/D-CIXS and the first detection of Ti Ka from s t r a c t The demonstration of a compact imaging X-ray spectrometer (D-CIXS), which flew on ESA new technologies for orbital X-ray fluorescence spectroscopy. D-CIXS conducted observations

Wieczorek, Mark

449

Lunar X-ray fluorescence observations by the Chandrayaan-1 X-ray Spectrometer (C1XS): Results from the nearside southern highlands  

E-Print Network (OSTI)

Lunar X-ray fluorescence observations by the Chandrayaan-1 X-ray Spectrometer (C1XS): Results from Spectroscopy a b s t r a c t The Chandrayaan-1 X-ray Spectrometer (C1XS) flown on-board the first Indian lunar mission Chan- drayaan-1, measured X-ray fluorescence spectra during several episodes of solar flares

Wieczorek, Mark

450

Integrated starting and running amalgam assembly for an electrodeless fluorescent lamp  

DOE Patents (OSTI)

An integrated starting and running amalgam assembly for an electrodeless SEF fluorescent lamp includes a wire mesh amalgam support constructed to jointly optimize positions of a starting amalgam and a running amalgam in the lamp, thereby optimizing mercury vapor pressure in the lamp during both starting and steady-state operation in order to rapidly achieve and maintain high light output. The wire mesh amalgam support is constructed to support the starting amalgam toward one end thereof and the running amalgam toward the other end thereof, and the wire mesh is rolled for friction-fitting within the exhaust tube of the lamp. The positions of the starting and running amalgams on the wire mesh are jointly optimized such that high light output is achieved quickly and maintained, while avoiding any significant reduction in light output between starting and running operation.

Borowiec, Joseph Christopher (Schenectady, NY); Cocoma, John Paul (Clifton Park, NY); Roberts, Victor David (Burnt Hills, NY)

1998-01-01T23:59:59.000Z

451

A Fluorescence Displacement Assay for Antidepressant Drug Discovery Based on Ligand-Conjugated Quantum Dots  

SciTech Connect

The serotonin (5-hydroxytryptamine, 5-HT) transporter (SERT) protein plays a central role in terminating 5-HT neurotransmission and is the most important therapeutic target for the treatment of major depression and anxiety disorders. We report an innovative, versatile, and target-selective quantum dot (QD) labeling approach for SERT in single Xenopus oocytes that can be adopted as a drug-screening platform. Our labeling approach employs a custom-made, QD-tagged indoleamine derivative ligand, IDT318, that is structurally similar to 5-HT and accesses the primary binding site with enhanced human SERT selectivity. Incubating QD-labeled oocytes with paroxetine (Paxil), a high-affinity SERT-specific inhibitor, showed a concentration- and time-dependent decrease in QD fluorescence, demonstrating the utility of our approach for the identification of SERT modulators. Furthermore, with the development of ligands aimed at other pharmacologically relevant targets, our approach may potentially form the basis for a multitarget drug discovery platform.

Chang, Jerry [Vanderbilt University; Tomlinson, Ian [Oak Ridge National Laboratory (ORNL); Warnement, Michael [Vanderbilt University; Iwamoto, Hideki [Vanderbilt University

2011-01-01T23:59:59.000Z

452

BIOCOMPATIBLE FLUORESCENT MICROSPHERES: SAFE PARTICLES FOR MATERIAL PENETRATION STUDIES (TAS Review Brief)  

SciTech Connect

The use of biocompatible polymer microspheres has been proposed for use in drug delivery, dispersal model verification and as a surrogate for threat agents in instrument validation. Modifying the production methods used in drug delivery for aerosol production should allow for low cost bio-weapon simulants. The ability to have a polymer sphere with a broad range of property tuning will allow for safe low cost use for homeland security and defense applications. Three main challenges are present in the production of such spheres. The first challenge is the reproduction of the fluorescent and other chemical properties of interest. Secondly, the particles must have the size and charge attributes needed for the specific application and testing. Finally, in order to reproduce testing and evaluation criteria a rapid, reliable, scalable and low cost production method must be available.

Farquar, G; Leif, R

2009-07-22T23:59:59.000Z

453

Inferring Black Carbon Concentrations in Particulate Organic Matter by Observing Pyrene Fluorescence Losses  

Science Journals Connector (OSTI)

Inferring Black Carbon Concentrations in Particulate Organic Matter by Observing Pyrene Fluorescence Losses ... For example, most atmospheric scientists are interested in the “blackness” of aerosols and the resultant effect on the radiative heat balance (3, 7), while oceanographers and soil scientists are interested in the refractory properties of BC in soils and sediments influencing its role in carbon cycling (5). ... Studies since the late 1970s and early 1980s have suggested that absorption into biogenic and diagenetic organic matter is a key process controlling the fate and effects of hydrophobic organic pollutants (8, 9), and this process has been described using a linear sorption model where Kd is the solid?water distribution coefficient (L/kgsolid), and this parameter is estimated using the product of the total organic carbon (TOC) fraction (fTOC, kgTOC/kgsediment) and the TOC-normalized distribution coefficient (KTOC, L/kgTOC). ...

D. Xanat Flores-Cervantes; Christopher M. Reddy; Philip M. Gschwend

2009-05-29T23:59:59.000Z

454

High resolution laser induced fluorescence Doppler velocimetry utilizing saturated absorption spectroscopy  

SciTech Connect

A high resolution laser induced fluorescence (LIF) system has been developed to measure the flow velocity field of neutral particles in an electron-cyclotron-resonance argon plasma. The flow velocity has been determined by the Doppler shift of the LIF spectrum, which is proportional to the velocity distribution function. Very high accuracy in velocity determination has been achieved by installing a saturated absorption spectroscopy unit into the LIF system, where the absolute value and scale of laser wavelength are determined by using the Lamb dip and the fringes of a Fabry-Perot interferometer. The minimum detectable flow velocity of a newly developed LIF system is {+-}2 m/s, and this performance remains unchanged in a long-time experiment. From the radial measurements of LIF spectra of argon metastable atoms, it is found that there exists an inward flow of neutral particles associated with neutral depletion.

Aramaki, Mitsutoshi [Department of Electrical Engineering and Computer Science, Nagoya University, Nagoya 464-8603 (Japan); Ogiwara, Kohei; Etoh, Shuzo [Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580 (Japan); Yoshimura, Shinji [National Institute for Fusion Science, Toki 509-5292 (Japan); Tanaka, Masayoshi Y. [Department of Advanced Energy Engineering Science, Kyushu University, Kasuga 816-8580 (Japan)

2009-05-15T23:59:59.000Z

455

Competing decay-channel fluorescence, dissociation, and ionization in superexcited levels of H{sub 2}  

SciTech Connect

The absolute cross sections for the competing decay-channel fluorescence, dissociation, and ionization of photoexcited long-lived superexcited H{sub 2} molecular levels have been measured from the ionization threshold of H{sub 2} up to the H(1s) + H(n=3) dissociation limit. The total and partial natural widths of these levels have been determined. Good agreement is found with first principles calculations carried out with the multichannel quantum defect theory for excited levels of {sup 1{Pi}}{sub u}{sup -} symmetry, which represent 70% of the levels studied experimentally. The calculations reproduce the balance between the competing decay processes as well as its substantial evolution from level to level.

Glass-Maujean, M. [Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique, Universite Pierre et Marie Curie, 4 place Jussieu, F-75252 Paris Cedex 5 (France); Jungen, Ch. [Laboratoire Aime Cotton, Centre National de la Recherche Scientifique, Batiment 505, Universite de Paris-Sud, F-91405 Orsay (France); Department of Physics and Astronomy, University College London, London WC1E 6BT (United Kingdom); Reichardt, G.; Balzer, A. [BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin (Germany); Schmoranzer, H. [Fachbereich Physik, Technische Universitaet Kaiserslautern, D-67653 Kaiserslautern (Germany); Ehresmann, A.; Haar, I.; Reiss, P. [Institute of Physics and Interdisciplinary Nanostructure Science and Technology, Heinrich-Plett-Strasse 40, Universitaet Kassel, D-34132 Kassel (Germany)

2010-12-15T23:59:59.000Z

456

Transmission Nuclear Resonance Fluorescence Measurements of 238U in Thick Targets  

SciTech Connect

Transmission nuclear resonance fluorescence measurements were made on targets consisting of Pb and depleted U with total areal densities near 86 g/cm2. The 238U content n the targets varied from 0 to 8.5percent (atom fraction). The experiment demonstrates the capability of using transmission measurements as a non-destructive technique to identify and quantify the presence of an isotope in samples with thicknesses comparable to he average thickness of a nuclear fuel assembly. The experimental data also appear to demonstrate the process of notch refilling with a predictable intensity. Comparison of measured spectra to previous backscatter 238U measurements indicates general agreement in observed excited states. Two new 238U excited states and possibly a third state have also been observed.

Quiter, Brian J.; Ludewigt, Bernhard A.; Mozin, Vladimir V.; Wilson, Cody; Korbly, Steve

2010-08-31T23:59:59.000Z

457

High Repetition Rate, LINAC-Based Nuclear Resonance Fluorescence FY 2008 Final Report  

SciTech Connect

This summarizes the first year of a multi-laboratory/university, multi-year effort focusing on high repetition rate, pulsed LINAC-based nuclear resonance fluorescence (NRF) measurements. Specifically, this FY2008 effort centered on experimentally assessing NRF measurements using pulsed linear electron accelerators, operated at various repetition rates, and identifying specific detection requirements to optimize such measurements. Traditionally, interest in NRF as a detection technology, which continues to receive funding from DHS and DOE/NA-22, has been driven by continuous-wave (CW), Van de Graff-based bremsstrahlung sources. However, in addition to the relatively sparse present-day use of Van de Graff sources, only limited NRF data from special nuclear materials has been presented; there is even less data available regarding shielding effects and photon source optimization for NRF measurements on selected nuclear materials.

Scott M Watson; Mathew T Kinlaw; James L Jones; Alan W. Hunt; Glen A. Warren

2008-12-01T23:59:59.000Z

458

Probing tribological properties of waxy oil in pipeline pigging with fluorescence technique  

Science Journals Connector (OSTI)

Abstract Tribological behavior of waxy oil (wax-particles-in-oil mixture) under a sliding soft contact in pipeline pigging process has been investigated using fluorescence technique. Results are reported for a soft line contact between an elastomer cylinder and a glass plate, which is lubricated by a model wax–oil system. It was found that, for waxy oil, the wax particles were entrapped at inlet region and pass through the contact region. The study revealed that the pigging efficiency was a function of Young’s module in rubber and the different lubricated soft contacts in pipeline pigging could be in situ observed. Experimental results indicated that the efficiency of pigging process decreased with the increasing degree of wear in sealing disc and was determined by the flow property of waxy oil.

Gui-Bin Tan; De-Guo Wang; Shu-Hai Liu; Si-Wei Zhang

2014-01-01T23:59:59.000Z

459

Fabrication of fluorescent composite with ultrafast aqueous synthesized high luminescent CdTe quantum dots  

SciTech Connect

Without precursor preparation, inert gas protection and enormous amount of additives and reductants, CdTe quantum dots (QDs) can be rapidly synthesized with high quality. A 600 nm photoluminescence peak wavelength could be obtained within 1 hour's refluxing through minimal addition of 1,2-diaminoethane (DAE). The theoretical design for the experiments are illustrated and further proved by the characterization results with different concentrations and reagents. On the other hand, generation of CdTe QDs was found even under room temperature by applying droplet quantity of DAE. This indicates that QDs can be synthesized with simply a bottle and no enormous additives required. The QDs were mixed into the epoxy matrix through solution casting method with cetyltrimethylammonium (CTA) capping for phase transfer. The acquired epoxy based nanocomposite exhibits good transparency, compatibility and fluorescence.

Zhang, Lei, E-mail: mejswu@ust.hk; Chen, Haibin, E-mail: mejswu@ust.hk, E-mail: mejswu@ust.hk; Wu, Jingshen, E-mail: mejswu@ust.hk, E-mail: mejswu@ust.hk [Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong and Fok Ying Tung Graduate School, The Hong Kong University of Science and Technology (Hong Kong); Bi, Xianghong, E-mail: takubatch@gmail.com [Fok Ying Tung Graduate School, The Hong Kong University of Science and Technology (Hong Kong)

2014-05-15T23:59:59.000Z

460

Effect of helium addition on discharge characteristics in a flat fluorescent lamp  

SciTech Connect

The discharge characteristics of a multielectrode dual coplanar in a mercury-free flat fluorescent lamp were investigated using brightness-efficiency measurement and the infrared (IR) spectrum and intensified charge coupled device (ICCD) characteristics. The level of brightness was above 14 900 cd/m{sup 2} under the conditions of neon--50% xenon-8% He gas composition, 150 Torr pressure, and 20 kHz alternating current pulse. The ICCD results revealed a faster and wider discharge with a Ne-50% Xe-8% He gas composition. The effect of adding helium (He) to Ne-50% Xe revealed a faster peak emission, as confirmed by ICCD images. From the gated IR emission spectrum, the intensity ratio of I{sub 823nm}/I{sub 828nm} was {approx}8% higher with Ne-50% Xe-8% He than with Ne-50% Xe under the same pressure and applied voltage conditions.

Lee, Seong-Eui; Lee, Ho-Nyeon; Park, Hyoung-Bin; Lee, Kyo Sung; Choi, Kyung Cheol [Materials and Devices Research Center, Samsung Advanced Institute of Technology, Suwon 440-600 (Korea, Republic of); Department of Electronics Engineering, Sejong University, Seoul 143-747 (Korea, Republic of); Department of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Korea, Republic of)

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Integrating fluorometer for the measurement of chlorophyll fluorescence induction in intact plants  

Science Journals Connector (OSTI)

An economical device for monitoring the integrated chlorophyll fluorescence emission of plant material is described. The system which uniquely incorporates an integrating sphere light source photographic shutter optical filters and a photodetector is applicable to intact plants whole leaves or other materials. It is noninvasive and a single sample may be repeatedly tested over time intervals of minutes to months. Data obtained provide information about the sample size (i.e. leaf area total chlorophyll content) and the photosynthetic activity of the sample. Samples of from a few mm2 to several cm2 can be accommodated depending on the diameter of the integrating sphere and excitation light source intensity. The device should be of interest to workers in plant breeding genetic engineering tissue culture horticulture herbicides pollution pathology and environmental stress.

Peter Toivonen; William Vidaver

1984-01-01T23:59:59.000Z

462

Chapter 9 - Total Internal Reflection Fluorescence (TIRF) Microscopy of Chlamydomonas Flagella  

Science Journals Connector (OSTI)

Abstract The eukaryotic flagellum is host to a variety of dynamic behaviors, including flagellar beating, the motility of glycoproteins in the flagellar membrane, and intraflagellar transport (IFT), the bidirectional traffic of protein particles between the flagellar base and tip. IFT is of particular interest, as it plays integral roles in flagellar length control, cell signaling, development, and human disease. However, our ability to understand dynamic flagellar processes such as IFT is limited in large part by the fidelity with which we can image these behaviors in living cells. This chapter introduces the application of total internal reflection fluorescence (TIRF) microscopy to visualize the flagella of Chlamydomonas reinhardtii. The advantages and challenges of TIRF are discussed in comparison to confocal and differential interference contrast techniques. This chapter also reviews current IFT insights gleaned from TIRF microscopy of Chlamydomonas and provides an outlook on the future of the technique, with particular emphasis on combining TIRF with other emerging imaging technologies.

Benjamin D. Engel; Karl-Ferdinand Lechtreck; Tsuyoshi Sakai; Mitsuo Ikebe; George B. Witman; Wallace F. Marshall

2009-01-01T23:59:59.000Z

463

Synchrotron x-ray fluorescence and extended x-ray absorption fine structure analysis  

SciTech Connect

The advent of dedicated synchrotron radiation sources has led to a significant increase in activity in many areas of science dealing with the interaction of x-rays with matter. Synchrotron radiation provides intense, linearly polarized, naturally collimated, continuously tunable photon beams, which are used to determine not only the elemental composition of a complex, polyatomic, dilute material but also the chemical form of the elements with improved accuracy. Examples of the application of synchrotron radiation include experiments in synchrotron x-ray fluorescence (SXRF) analysis and extended x-ray absorption fine structure (EXAFS) analysis. New synchrotron radiation x-ray microprobes for elemental analysis in the parts per billion range are under construction at several laboratories. 76 references, 24 figures.

Chen, J.R.; Gordon, B.M.; Hanson, A.L.; Jones, K.W.; Kraner, H.W.; Chao, E.C.T.; Minkin, J.A.

1984-01-01T23:59:59.000Z

464

Graphene as a Substrate To Suppress Fluorescence in Resonance Raman Spectroscopy  

E-Print Network (OSTI)

Resonance Raman spectroscopy (RRS), which can enhance Raman signal by 107 times than normal Raman spectroscopy, is a powerful approach to characterize structures of chemicals (especially biomolecules) at low concentrations.1-4 However, fluorescence (FL) background is a major obstacle in RRS because the FL cross section (?10-16 cm2) is much larger than the RRS cross section (?10-22 cm2).3 Several approaches, such as ultraviolet RRS (UV-RRS),1 time-resolved Raman detection,5,6 femtosecond broadband stimu-lated Raman spectroscopy (FSRS),7 and coherent anti-Stokes Raman spectroscopy (CARS),8 have been used to suppress or reject FL background in RRS. However, these approaches need expensive and complex equipments and have other limitations, such as sample degradation in UV-RRS. Surface-enhanced Raman spectroscopy (SERS) is another powerful approach to characterize structures of chemicals at extremely low concentrations or even at the single

Liming Xie; Xi Ling; Yuan Fang; Jin Zhang; Zhongfan Liu

2009-01-01T23:59:59.000Z

465

Microsoft Word - EA-1881-FEA-2011.docx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Program: Energy Conservation Standards for Fluorescent Lamp Ballasts DOE/EA-1881 10/5/2011 16-ii CHAPTER 16. ENVIRONMENTAL ASSESSMENT TABLE OF CONTENTS 16.1 INTRODUCTION ............................................................................................................ 16-1 16.2 AIR EMISSIONS ANALYSIS ......................................................................................... 16-1 16.2.1 Air Emissions Descriptions................................................................................ 16-1 16.2.2 Air Quality Regulation ....................................................................................... 16-4

466

Page 1 DePaul Cinespace Studios Equipment Reservation Sheet  

E-Print Network (OSTI)

Mount Charger w/ power cord 1,156.00$ FLUORESCENT FIXTURES KINO FLO 6 4x4 head w/ select ballast, 1 head Kit) 605.00$ 2 2' Fixture Travel Case (Interview Kit) 550.00$ 2 4' Bulb Ship Case 220.00$ 2 2' Bulb

Schaefer, Marcus

467

The reproducibility of [sup 109]Cd-based X-ray fluorescence measurements of bone lead  

SciTech Connect

We assessed the reproducibility of X-ray fluorescence-based lead measurements from multiple measurements made on a low-concentration plaster of paris phantom and in five subjects measured five times on two occasions. Over a 6-month period, 220 measurements of the same phantom were obtained and showed a standard deviation of 1.29 [mu]g Pb (g plaster of paris)[sup [minus]1]. The two sets of in vivo measurements were made 10 months apart and revealed a mean standard deviation of 3.4 [mu]Pb (g bone mineral)[sup [minus]1] and 5.1 [mu]g Pb (g bone mineral)[sup [minus]1] for males and females, respectively. Our measured standard deviation exceeded by 20-30% the calculated standard deviation associated with a single measurement both in the phantom and in subjects. This indicates that some variance is introduced during the measurement process. Operator learning and consistency significantly minimized this increased variability. Measured lead concentrations of the left and right tibia in 14 subjects showed no significant differences between legs. As a result, either tibia can be sampled and compared over time. The levels of reproducibility we report here mean that X-ray fluorescence-based determinations of bone lead concentrations are reliable both over the short and long term. Thus, reasonably sized confidence intervals can be placed on detected changes in concentration and should permit acquisition of longitudinal data within a reasonable length of time. 19 refs., 1 fig., 6 tabs.

Gordon, C.L. (Chedoke-McMaster Hospitals, Hamilton, Ontario (Canada)); Webber, C.E.; Chettle, D.R. (McMaster Univ., Hamilton, Ontario (Canada))

1994-08-01T23:59:59.000Z

468

Portable X-ray fluorescence in the assessment of rare earth element-enriched sedimentary phosphate deposits  

Science Journals Connector (OSTI)

...fluorescence in the assessment of rare earth element-enriched sedimentary...considered as potential sources of rare earth elements (REEs) and...phosphate deposit|pulps|rare earth elements|recalibration...into effluents associated with phosphogypsum stockpiles and could pose a...

G.J. Simandl; R. Fajber; S. Paradis

469

Crystal Structures of the GCaMP Calcium Sensor Reveal the Mechanism of Fluorescence Signal Change and Aid Rational Design  

SciTech Connect

The genetically encoded calcium indicator GCaMP2 shows promise for neural network activity imaging, but is currently limited by low signal-to-noise ratio. We describe x-ray crystal structures as well as solution biophysical and spectroscopic characterization of GCaMP2 in the calcium-free dark state, and in two calcium-bound bright states: a monomeric form that dominates at intracellular concentrations observed during imaging experiments and an unexpected domain-swapped dimer with decreased fluorescence. This series of structures provides insight into the mechanism of Ca{sup 2+}-induced fluorescence change. Upon calcium binding, the calmodulin (CaM) domain wraps around the M13 peptide, creating a new domain interface between CaM and the circularly permuted enhanced green fluorescent protein domain. Residues from CaM alter the chemical environment of the circularly permuted enhanced green fluorescent protein chromophore and, together with flexible inter-domain linkers, block solvent access to the chromophore. Guided by the crystal structures, we engineered a series of GCaMP2 point mutants to probe the mechanism of GCaMP2 function and characterized one mutant with significantly improved signal-to-noise. The mutation is located at a domain interface and its effect on sensor function could not have been predicted in the absence of structural data.

Akerboom, Jasper; Velez Rivera, Jonathan D.; Rodriguez Guilbe, María M.; Alfaro Malavé, Elisa C.; Hernandez, Hector H.; Tian, Lin; Hires, S. Andrew; Marvin, Jonathan S.; Looger, Loren L.; Schreiter, Eric R.; (MIT); (Puerto Rico); (HHMI)

2009-03-16T23:59:59.000Z

470

Comparison of a semiautomated fluorescent immunoassay system and indirect immunofluorescence for detection of antinuclear antibodies in human serum.  

Science Journals Connector (OSTI)

...well as the concentration of nuclear antigens present in sub- strates...have the same specificity for nuclear an- tigens, the variety of...slide, allows cytoplasmic and nuclear fluorescence to be differentiated...ANA results, the relative cost of reagents and tech- nologist...

C H Casavant; A C Hart; D P Stites

1979-11-01T23:59:59.000Z

471

Red-shifted fluorescent proteins mPlum and mRaspberry and polynucleotides encoding the same  

DOE Patents (OSTI)

Methods using somatic hypermutation (SHM) for producing polypeptide and nucleic acid variants, and nucleic acids encoding such polypeptide variants are disclosed. Such variants may have desired properties. Also disclosed are novel polypeptides, such as improved fluorescent proteins, produced by the novel methods, and nucleic acids, vectors, and host cells comprising such vectors.

Tsien, Roger Y. (La Jolla, CA); Wang, Lei (San Diego, CA)

2008-07-01T23:59:59.000Z

472

Red tide detection and tracing using MODIS fluorescence data: A regional example in SW Florida coastal waters  

E-Print Network (OSTI)

Red tide detection and tracing using MODIS fluorescence data: A regional example in SW Florida-time data from the MODIS satellite sensor was used to detect and trace a harmful algal bloom (HAB), or red to interferences of other water constituents. The red tide that formed from November to December 2004 off SW

473

2-dimensional ion velocity distributions measured by laser-induced fluorescence above a radio-frequency biased silicon wafer  

E-Print Network (OSTI)

2-dimensional ion velocity distributions measured by laser-induced fluorescence above a radio-frequency cm diameter, 2.2 MHz-biased silicon wafer in a commercial inductively coupled plasma processing rf frequencies,5­7,18 non-sinusoidal waveforms8 and pulsed power.9,19 Control of IEDs in many

California at Los Angles, University of

474

Technical description of candidate fluorescence compounds and radioisotopes for a nuclear smuggling deterrence tag (IL500E)  

SciTech Connect

This report summarizes the efforts completed in identifying candidate fluorescence compounds and radioisotopes for a developing tagging system. The tagging system is being developed as a deterrent to nuclear smuggling, by providing a means of: (1) tracing materials and pilferers to the facility of origin for any recovered special nuclear materials; (2) inventory control of long-term stored items containing special nuclear materials; and (3) tracking materials transferred between facilities. The tagging system uses four types of tagging materials to cover a range of applications intended to prevent the pilfering of special nuclear materials. One material, fluorescent compounds which are invisible without ultraviolet or near-infrared detection systems, is marked on controlled items with a tracking pattern that corresponds to a specified item in a specified location in the data control system. The tagging system uses an invisible, fluorescent dusting powder to mark equipment and personnel who inappropriately handle the tagged material. The tagging system also uses unique combinations of radionuclides to identify the facility of origin for any special nuclear material. Currently, 18 long-lived radioisotopes, 38 short-live radioisotopes and 10 fluorescent compounds have been selected as candidate materials for the tagging system.

Hartenstein, S.D.; Aryaeinejad, R.

1996-03-01T23:59:59.000Z

475

Laser-Induced Fluorescence Detection in High-Throughput Screening of Heterogeneous Catalysts and Single Cells Analysis  

SciTech Connect

Laser-induced fluorescence detection is one of the most sensitive detection techniques and it has found enormous applications in various areas. The purpose of this research was to develop detection approaches based on laser-induced fluorescence detection in two different areas, heterogeneous catalysts screening and single cell study. First, we introduced laser-induced imaging (LIFI) as a high-throughput screening technique for heterogeneous catalysts to explore the use of this high-throughput screening technique in discovery and study of various heterogeneous catalyst systems. This scheme is based on the fact that the creation or the destruction of chemical bonds alters the fluorescence properties of suitably designed molecules. By irradiating the region immediately above the catalytic surface with a laser, the fluorescence intensity of a selected product or reactant can be imaged by a charge-coupled device (CCD) camera to follow the catalytic activity as a function of time and space. By screening the catalytic activity of vanadium pentoxide catalysts in oxidation of naphthalene, we demonstrated LIFI has good detection performance and the spatial and temporal resolution needed for high-throughput screening of heterogeneous catalysts. The sample packing density can reach up to 250 x 250 subunits/cm{sub 2} for 40-{micro}m wells. This experimental set-up also can screen solid catalysts via near infrared thermography detection.

Hui Su

2001-05-01T23:59:59.000Z

476

Laser fluorescence study of AIO formed in the reaction AI + O2: Product state distribution, dissociation energy, and radiative  

E-Print Network (OSTI)

.5 ± I kcallmole is recommended for aluminum monoxide. Direct measurement of the fluorescence decay + 0 has been studied by Fontijn, Felder, and Houghton! in a fast- flow reactor. They find, comparison of the ex- perimental and theoretical internal state distributions 1824 The Journal of Chemical

Zare, Richard N.

477

Orange Fluorescent Proteins: Structural Studies of LSSmOrange, PSmOrange and PSmOrange2  

E-Print Network (OSTI)

to greatly decrease the energy of photoconversion and increase its efficiency of photoswitching. Fluorescence Editor: Maria Sola, Molecular Biology Institute of Barcelona, CSIC, Spain Received March 13, 2014 of the Advanced Photon Source was supported by the US Department of Energy, Office of Science, Office of Basic

Verkhusha, Vladislav V.

478

Microarray Immunoassay for Phenoxybenzoic Acid Using Polymer Encapsulated Eu:Gd2O3 Nanoparticles as Fluorescent Labels  

Science Journals Connector (OSTI)

Lanthanide oxides are commonly used as fluorescent materials in the lighting industry. ... PBA is a generic biomarker of human exposure to pyrethroids, a group of highly potent insecticides widely used in agriculture, forestry, horticulture, animal and public health, and households. ... Particle size distributions were measured on a Nanotrac particle size analyzer, model NPA150 from Microtrac Inc. (Montgomeryville, PA), by dynamic light scattering technology. ...

Mikaela Nichkova; Dosi Dosev; Shirley J. Gee; Bruce D. Hammock; Ian M. Kennedy

2005-09-23T23:59:59.000Z

479

Shape-Selective Sorption and Fluorescence Sensing of Aromatics in a Flexible Network of Tetrakis[(4-methylthiophenyl)ethynyl]silane  

E-Print Network (OSTI)

Shape-Selective Sorption and Fluorescence Sensing of Aromatics in a Flexible Network of Tetrakis[(4 entering the pores, enabling, for example, the selective sorption of benzene over hexafluorobenzene networks.1-6 Examples of sorption studies in crystalline coordination networks include selective binding

Li, Jing

480

High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an X-ray Absorption  

E-Print Network (OSTI)

-ray photons from a large solid angle with five spherically bent crystals. It will cover a large energy rangeHigh energy resolution five-crystal spectrometer for high quality fluorescence and absorption however presents some limitations related to the limited energy resolution and saturation. Crystal

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "2-lamp ballasts fluorescent" from the National Library of EnergyBeta (NLEBeta).
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481

Replication-Competent Influenza A Virus That Encodes a Split-Green Fluorescent Protein-Tagged PB2 Polymerase Subunit Allows Live-Cell Imaging of the Virus Life Cycle  

Science Journals Connector (OSTI)

...Influenza A Virus That Encodes a Split-Green Fluorescent Protein-Tagged PB2 Polymerase...circumvent this limitation, we used the split-green fluorescent protein (split-GFP) system...complete replacement of a viral protein by green fluorescent protein (GFP) (e.g...

Sergiy V. Avilov; Dorothée Moisy; Sandie Munier; Oliver Schraidt; Nadia Naffakh; Stephen Cusack

2011-11-23T23:59:59.000Z

482

Lighting in Residential and Commercial Buildings (1993 and 1995 Data)  

U.S. Energy Information Administration (EIA) Indexed Site

Types > 1995 CBECS Lighting Equipment Types > 1995 CBECS Lighting Equipment 1995 CBECS Lighting Equipment Profile Lighting Equipment - Type and Characteristics of Equipment Emits Found In Incandescent Incandescent Light Bulb Produces light by electrically heating a tungsten filament Includes energy-efficient incandescent bulbs, such as Reflector or R-Lamps (accent and task lighting), Parabolic Aluminized Reflector (PAR) lamps (flood and spot lighting), and Ellipsoidal Reflector (ER) lamps (recessed lighting) Highly inefficient because much of the energy is lost as heat 14-18 Lumens Per Watt (LPW) 14% of Lit Commercial Floorspace Standard Fluorescent Lighting with Magnetic Ballast Standard Fluorescent with Magnetic Ballast Produces light by passing electricity through mercury vapor, causing the fluorescent coating to glow or fluoresce

483

Ultrasound guided fluorescence molecular tomography with improved quantification by an attenuation compensated born-normalization and in vivo preclinical study of cancer  

SciTech Connect

Ultrasound imaging, having the advantages of low-cost and non-invasiveness over MRI and X-ray CT, was reported by several studies as an adequate complement to fluorescence molecular tomography with the perspective of improving localization and quantification of fluorescent molecular targets in vivo. Based on the previous work, an improved dual-modality Fluorescence-Ultrasound imaging system was developed and then validated in imaging study with preclinical tumor model. Ultrasound imaging and a profilometer were used to obtain the anatomical prior information and 3D surface, separately, to precisely extract the tissue boundary on both sides of sample in order to achieve improved fluorescence reconstruction. Furthermore, a pattern-based fluorescence reconstruction on the detection side was incorporated to enable dimensional reduction of the dataset while keeping the useful information for reconstruction. Due to its putative role in the current imaging geometry and the chosen reconstruction technique, we developed an attenuation compensated Born-normalization method to reduce the attenuation effects and cancel off experimental factors when collecting quantitative fluorescence datasets over large area. Results of both simulation and phantom study demonstrated that fluorescent targets could be recovered accurately and quantitatively using this reconstruction mechanism. Finally, in vivo experiment confirms that the imaging system associated with the proposed image reconstruction approach was able to extract both functional and anatomical information, thereby improving quantification and localization of molecular targets.

Li, Baoqiang; Berti, Romain; Abran, Maxime; Lesage, Frédéric, E-mail: frederic.lesage@polymtl.ca [Institute of Biomedical Engineering, École Polytechnique de Montréal, Montreal, Quebec H3C 3A7 (Canada) [Institute of Biomedical Engineering, École Polytechnique de Montréal, Montreal, Quebec H3C 3A7 (Canada); Montreal Heart Institute, Montreal, Quebec H1T 1C8 (Canada)

2014-05-15T23:59:59.000Z

484

The Interaction between Rac1 and Its Guanine Nucleotide Dissociation Inhibitor (GDI), Monitored by a Single Fluorescent Coumarin Attached to GDI  

Science Journals Connector (OSTI)

The Interaction between Rac1 and Its Guanine Nucleotide Dissociation Inhibitor (GDI), Monitored by a Single Fluorescent Coumarin Attached to GDI ... The interaction of rac with guanine nucleotide dissociation inhibitor protein (rhoGDI) is described, using GDI fluorescently labeled on its single cysteine with N-[2-(1-maleimidyl)ethyl]-7-diethylaminocoumarin-3-carboxamide (MDCC). ... The labeled GDI shows a 70% decrease in fluorescence emission on binding geranylgeranylated rac1·GDP and has an affinity for rac1 within a factor of 2 of the unlabeled GDI. ...

Anthony R. Newcombe; Richard W. Stockley; Jackie L. Hunter; Martin R. Webb

1999-05-04T23:59:59.000Z

485

A fluorescent screening platform for the rapid evaluation of chemicals in cellular reprogramming  

Science Journals Connector (OSTI)

Current strategies to monitor reprogramming into induced pluripotent stem cells (iPSCs) are limited in that they rely on the recognition of advanced stage biomarkers or they involve the transduction of genetically-modified cells. These limitations are particularly problematic in high-throughput screenings where cell availability, low cost and a rapid experimental protocol are critical issues. Herein we report the application of a pluripotent stem cell fluorescent probe (i.e. CDy1) as a reporter for the rapid screening of chemicals in reprogramming iPSCs. \\{CDy1\\} stains early-stage iPSCs at 7 dpi as well as matured iPSCs; hence it can partially overcome the slow kinetics of the reprogramming process. As a proof of concept, we employed a CDy1-based screening in 384 well-plates to examine the effect of newly synthesized hydroxamic acid derivatives in reprogramming mouse fibroblasts transduced with Oct4, Sox2 and Klf-4 without c-Myc. One compound (1–26) was identified as a reprogramming enhancer by 2.5-fold and we confirmed that 1–26 behaves as a histone deacetylase (HDAC) inhibitor. The successful identification of novel small molecules enhancing the generation of iPSCs by means of a rapid and simple protocol demonstrates the suitability of this CDy1-based screening platform for the large scale and high-throughput evaluation of iPSC modulators.

Marc Vendrell; Sung-Jin Park; Yogeswari Chandran; Chi-Lik Ken Lee; Hyung-Ho Ha; Nam-Young Kang; Seong-Wook Yun; Young-Tae Chang

2012-01-01T23:59:59.000Z

486

Interfacing picoliter droplet microfluidics with addressable microliter compartments using fluorescence activated cell sorting  

Science Journals Connector (OSTI)

Abstract Droplet microfluidic platforms have, while enabling high-throughput manipulations and the assaying of single cell scale compartments, been lacking interfacing to allow macro scale access to the output from droplet microfluidic operations. Here, we present a simple and high-throughput method for individually directing cell containing droplets to an addressable and macro scale accessible microwell slide for downstream analysis. Picoliter aqueous droplets containing low gelling point agarose and eGFP expressing Escherichia coli (E. coli) are created in a microfluidic device, solidified to agarose beads and transferred into an aqueous buffer. A Fluorescence activated cell sorter (FACS) is used to sort agarose beads containing cells into microwells in which the growth and expansion of cell colonies is monitored. We demonstrate fast sorting and high accuracy positioning of sorted 15 ?m gelled droplet agarose beads into microwells (14 × 48) on a 25 mm × 75 mm microscope slide format using a FACS with a 100 ?m nozzle and an xy-stage. The interfacing method presented here enables the products of high-throughput or single cell scale droplet microfluidics assays to be output to a wide range of microtiter plate formats familiar to biological researchers lowering the barriers for utilization of these microfluidic platforms.

Yunpeng Bai; Emilie Weibull; Haakan N. Joensson; Helene Andersson-Svahn

2014-01-01T23:59:59.000Z

487

Isotope shifts of natural Sr+ measured by laser fluorescence in a sympathetically cooled Coulomb crystal  

E-Print Network (OSTI)

We measured by laser spectroscopy the isotope shifts between naturally-occurring even-isotopes of strontium ions for both the $5s\\,\\,^2S_{1/2}\\to 5p\\,\\,^2P_{1/2}$ (violet) and the $4d\\,\\,^2D_{3/2}\\to 5p\\,\\,^2P_{1/2}$ (infrared) dipole-allowed optical transitions. Fluorescence spectra were taken by simultaneous measurements on a two-component Coulomb crystal in a linear Paul trap containing $10^3$--$10^4$ laser-cooled Sr$^+$ ions. The isotope shifts are extracted from the experimental spectra by fitting the data with the analytical solution of the optical Bloch equations describing a three-level atom in interaction with two laser beams. This technique allowed us to increase the precision with respect to previously reported data obtained by optogalvanic spectroscopy or fast atomic-beam techniques. The results for the $5s\\,\\,^2S_{1/2}\\to 5p\\,\\,^2P_{1/2}$ transition are $\

Brice Dubost; Romain Dubessy; Benjamin Szymanski; Samuel Guibal; Jean-Pierre Likforman; Luca Guidoni

2014-02-14T23:59:59.000Z

488

Fluorescence analysis can identify movable oil in self-sourcing reservoirs  

SciTech Connect

The recent surge of activity involving self-sourcing reservoirs and horizontal drilling recognizes a little tapped niche in the domestic energy mix. Such prolific pays as the Cretaceous Bakken and Austin Chalk have drawn research interest and large amounts of investment capital. Fluorescence analysis can discern movable oil--as opposed to exhausted source rock--in such reservoirs with an inexpensive test. Other potential targets are the Cretaceous Mesaverde in the Piceance basin, Devonian New Albany shale in Kentucky, Devonian Antrim shale in the Michigan basin, and the Cretaceous Niobrara, Mancos, and Pierre formations in Colorado and New Mexico. To insure success in this niche this key question must be answered positively: Is movable oil present in the reservoir? Even if tectonic studies verify a system of open fractures, sonic logs confirm overpressuring in the zone, and resistivity logs document the maturity of the source, the ultimate question remains: Is movable oil in the fractures available to flow to the borehole? The paper explains a technique that will answer these questions.

Calhoun, G.G. [Calhoun (Gerry G.), Midland, TX (United States)

1995-06-05T23:59:59.000Z

489

Comparison of NO and OH planar fluorescence temperature measurements in scramjet model flowfields  

SciTech Connect

The use of nitric oxide (NO) and the hydroxyl radical (OH) as temperature tracers, in a two-line planar laser-induced fluorescence technique, is examined in the context of a supersonic mixing and combustion flowfield. The temperature measurements were based on the sequential excitation of two transitions, either in the A implied by X (0,0) band of NO near 226 nm or the A implied by X (1,0) band of OH near 283 nm. The measurements were obtained for each species through the use of two lasers and two cameras, with each camera integrating signal induced from only one of the lasers. Both temporally resolved and frame-averaged temperature measurements of each species are presented. Additional results include simultaneous NO and OH visualizations, in which seeded NO marks the fuel jet fluid and nascent OH marks the reaction zones and convected combustion gases. A detailed temperature comparison shows good agreement in the common measurement regions and indicates that shot noise is the largest source of uncertainty. The comparison also illustrates the importance of a careful interpretation of the measurements, since, depending on the origin of the tracer and the degree of mixing, the measurements may be biased toward the fuel, freestream, or reaction zone temperatures. 33 refs.

Mcmillin, B.K.; Seitzman, J.M.; Hanson, R.K. [Natl. Inst. of Standards and Technology, Gaithersburg, MD (United States)

1994-10-01T23:59:59.000Z

490

Laser-induced fluorescence velocity measurements of a diverging cusped-field thruster  

Science Journals Connector (OSTI)

Measurements are presented of the most probable time-averaged ion velocities within the acceleration channel and in the plume of a diverging cusped-field thruster operating on xenon. Xenon ion velocities for the thruster are derived from laser-induced fluorescence measurements of the 5d[4]7/2–6p[3]5/2 xenon ion excited state transition centred at ? = 834.72?nm. The thruster is operated in both a high-current mode, where the anode discharge current is shown to oscillate periodically, and a low-current mode where operation is relatively quiescent. In the low-current mode, ion emission is predominantly in the form of a conical jet, whereas in the high-current mode, the emission is still divergent but more diffuse throughout the cone angle. These time-average measurements provide insight into the structure of the acceleration region. However, discerning the mechanism for the diffuse ion emission in the strongly oscillating high-current mode will require ion velocity measurements capable of resolving the time-dependent behaviour of the discharge.

N A MacDonald; M A Cappelli; S R Gildea; M Martínez-Sánchez; W A Hargus Jr

2011-01-01T23:59:59.000Z

491

Determination of polynuclear aromatic hydrocarbons in seafood by liquid chromatography with fluorescence detection  

SciTech Connect

Modification of a previously published method for determination of polynuclear aromatic hydrocarbons (PAHs) produces very clean seafood extracts in less than half the time. After alkaline digestion of the seafood, PAHs were partitioned into 1,2,3-trichlorotrifluoroethane. The resulting extract was cleaned up by solid-phase extraction on alumina, silica, and C{sub 18} adsorbents and then analyzed by gradient reversed-phase liquid chromatography with programmable fluorescence detection. Average recoveries of 12 PAHs [acenaphthene, anthracene, fluoranthene, pyrene, benz(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)-fluoranthene, benzo(k)-fluoranthene, benzo(a)pyrene, dibenz(a,h)anthracene, benzo(ghi)perylene, and indeno(1,2,3-cd)pyrene] from 5 different matrixes (mussels, oysters, clams, crabmeat, and salmon)spiked at low parts-per-billion levels ranged from 76 to 94%. Estimated limits of quantitation ranged from 0.01 to 0.6 ppb PAHs in extracts that were free of matrix interferences. Results of analyses of a mussels standard reference material obtained from the National Institute of Standards and Technology were in good agreement with the certified values. 16 refs., 3 figs., 4 tabs.

Perfetti, G.A.; Nyman, P.J.; Fisher, S.; Joe, F.L. Jr.; Diachenko, G.W. [Food and Drug Administration, Washington, DC (United States)

1992-09-01T23:59:59.000Z

492

X-ray optics for scanning fluorescence microscopy and other applications  

SciTech Connect

Scanning x-ray fluorescence microscopy is analogous to scanning electron microscopy. Maps of chemical element distribution are produced by scanning with a very small x-ray beam. Goal is to perform such scanning microscopy with resolution in the range of <1 to 10 {mu}m, using standard laboratory x-ray tubes. We are investigating mirror optics in the Kirkpatrick-Baez (K-B) configuration. K-B optics uses two curved mirrors mounted orthogonally along the optical axis. The first mirror provides vertical focus, the second mirror provides horizontal focus. We have used two types of mirrors: synthetic multilayers and crystals. Multilayer mirrors are used with lower energy radiation such as Cu K{alpha}. At higher energies such as Ag K{alpha}, silicon wafers are used in order to increase the incidence angles and thereby the photon collection efficiency. In order to increase the surface area of multilayers which reflects x-rays at the Bragg angle, we have designed mirrors with the spacing between layers graded along the optic axis in order to compensate for the changing angle of incidence. Likewise, to achieve a large reflecting surface with silicon, the wafers are placed on a specially designed lever arm which is bent into a log spiral by applying force at one end. In this way, the same diffracting angle is maintained over the entire surface of the wafer, providing a large solid angle for photon collection.

Ryon, R.W. [Lawrence Livermore National Lab., CA (United States); Warburton, W.K. [X-Ray Instrumentation Associates, Menlo Park, CA (United States)

1992-05-01T23:59:59.000Z

493

3D Fluorescent and Reflective Imaging of Whole Stardust Tracks in Aerogel  

SciTech Connect

The NASA Stardust mission returned to earth in 2006 with the cometary collector having captured over 1,000 particles in an aerogel medium at a relative velocity of 6.1 km/s. Particles captured in aerogel were heated, disaggregated and dispersed along 'tracks' or cavities in aerogel, singular tracks representing a history of one capture event. It has been our focus to chemically and morphologically characterize whole tracks in 3-dimensions, utilizing solely non-destructive methods. To this end, we have used a variety of methods: 3D Laser Scanning Confocal Microscopy (LSCM), synchrotron X-ray fluorescence (SXRF), and synchrotron X-ray diffraction (SXRD). In the past months we have developed two new techniques to aid in data collection. (1) We have received a new confocal microscope which has enabled autofluorescent and spectral imaging of aerogel samples. (2) We have developed a stereo-SXRF technique to chemically identify large grains in SXRF maps in 3-space. The addition of both of these methods to our analytic abilities provides a greater understanding of the mechanisms and results of track formation.

Greenberg, M.; Ebel, D.S. (AMNH)

2011-11-07T23:59:59.000Z

494

Single and two-photon fluorescence control of Er{sup 3+} ions by phase-shaped femtosecond laser pulse  

SciTech Connect

We experimentally demonstrate the control of the single and two-photon fluorescence (SPF and TPF) in Er{sup 3+} ions by shaping the femtosecond laser pulse with a ? or square phase modulation. With the low laser intensity (8.4?×?10{sup 10}?W/cm{sup 2}), SPF keeps a constant while TPF is effectively suppressed by the two control schemes. With the high laser intensity (1.2?×?10{sup 13}?W/cm{sup 2}), both SPF and TPF are simultaneously enhanced or suppressed by the ? phase modulation, and SPF is enhanced while TPF is effectively suppressed by the square phase modulation. The up/down-conversion fluorescence enhancement, suppression, or tuning by the optical control method can greatly expand its applications in various related fields.

Zhang, Shian, E-mail: sazhang@phy.ecnu.edu.cn; Ding, Jingxin; Lu, Chenhui; Jia, Tianqing; Sun, Zhenrong, E-mail: zrsun@phy.ecnu.edu.cn [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China)] [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China); Xu, Shuwu [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China) [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China); School of Science, Nantong University, Nantong 226007 (China); Qiu, Jianrong [State Key Laboratory of Luminescent Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Wushan Road 381, Guangzhou 510640 (China)] [State Key Laboratory of Luminescent Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Wushan Road 381, Guangzhou 510640 (China)

2014-01-06T23:59:59.000Z

495

On the Search for Nuclear Resonance Fluorescence Signatures of 235U and 238U above 3 MeV  

SciTech Connect

Nuclear resonance fluorescence is a physical process that provides an isotope-specific signature that could be used for the identification and characterization of materials. The technique involves the detection of prompt discrete-energy photons emitted from a sample that is exposed to MeV-energy photons. Potential applications of the technique range from detection of high explosives to characterization of special nuclear materials such as 235U. Pacific Northwest National Laboratory and Passport Systems have collaborated to conduct a pair of measurements to search for a nuclear resonance fluorescence response of 235U above 3 MeV and of 238U above 5 MeV using an 8 g sample of highly enriched uranium and a 90 g sample of depleted uranium. No new signatures were observed. The minimum detectable integrated cross section for 235U is presented.

Warren, Glen A.; Caggiano, Joseph A.; Bertozzi, William; Korbly, Steve; Ledoux, Robert; Park, William H.

2010-02-01T23:59:59.000Z

496

Quantitative analysis of phosphosilicate glass films on silicon wafers for calibration of x-ray fluorescence spectrometry standards  

SciTech Connect

The phosphorus and silicon contents of phosphosilicate glass films deposited by chemical vapor deposition (CVD) on silicon wafers were determined. These films were prepared for use as x-ray fluorescence (XRF) spectrometry standards. The thin films were removed from the wafer by etching with dilute hydrofluoric acid, and the P and Si concentrations in solution were determined by inductively coupled plasma atomic emission spectroscopy (ICP). The calculated phosphorus concentration ranged from 2.2 to 12 wt %, with an uncertainty of 2.73 to 10.1 relative percent. Variation between the calculated weight loss (summation of P/sub 2/O/sub 5/ and SiO/sub 2/ amounts as determined by ICP) and the measured weight loss (determined gravimetrically) averaged 4.9%. Results from the ICP method, Fourier transform-infrared spectroscopy (FT-IR), dispersive infrared spectroscopy, electron microprobe, and x-ray fluorescence spectroscopy for the same samples are compared.

Weissman, S.H.

1983-01-01T23:59:59.000Z

497

Modeling green fluorescent protein transcription, translation and modification as a method to obtain NF-kappaB activation profiles  

E-Print Network (OSTI)

Jayaraman Committee Members, Juergen Hahn Mike McShane Head of Department, N.K. Anand August 2007 Major Subject: Chemical Engineering iii ABSTRACT Modeling Green Fluorescent Protein Transcription, Translation and Modification as a Method... my profound thanks to my advisor, Dr. Arul Jayaraman, and my committee members, Dr. Juergen Hahn and Dr. Mike McShane, for their guidance and support throughout the course of this research. I would like to extend my gratitude to Jacky Huang who...

Laible, Allyson Marie

2009-05-15T23:59:59.000Z

498

Kinetics of Cdc42 Membrane Extraction by Rho-GDI Monitored by Real-Time Fluorescence Resonance Energy Transfer  

Science Journals Connector (OSTI)

Kinetics of Cdc42 Membrane Extraction by Rho-GDI Monitored by Real-Time Fluorescence Resonance Energy Transfer† ... This assay enabled us to directly monitor the (GDI-induced) release of Cdc42 from membranes. ... Specifically, we propose that the GDI first binds rapidly to membrane-associated Cdc42 and then a slower isomerization occurs which represents the rate-limiting step for the dissociation of the Cdc42?RhoGDI complex from membranes. ...

Tyzoon K. Nomanbhoy; Jon W. Erickson; Richard A. Cerione

1999-01-16T23:59:59.000Z

499

COMPARISON OF DETECTION CAPABILITY FOR ACOUSTIC THERMOGRAPHY, VISUAL INSPECTION AND FLUORESCENT PENETRANT INSPECTION ON GAS TURBINE COMPONENTS  

Science Journals Connector (OSTI)

The innovative NDE inspection system Acoustic Thermography is developed with Sonic Infrared (Sonic IR) technology. Since the probability of detection is sensitive to the flaw characteristics the fabricated flaws could not simulated the nature flaws with accuracy. The study is focus on gas turbine blades with service induced fatigue cracks. The detection capability of this innovative NDE inspection system is compared with two traditional NDE methods: Visual Inspection and Fluorescent Penetrant Inspection. POD curves for each technique were generated and compared.

Y. Guo; F. R. Ruhge

2009-01-01T23:59:59.000Z

500

Characterization of atmospheric aerosols using Synchroton radiation total reflection X-ray fluorescence and Fe K-edge total reflection X-ray fluorescence-X-ray absorption near-edge structure  

Science Journals Connector (OSTI)

In this study a new procedure using Synchrotron total reflection X-ray fluorescence (SR-TXRF) to characterize elemental amounts in atmospheric aerosols down to particle sizes of 0.015 um is presented. The procedure was thoroughly evaluated regarding bounce off effects and blank values. Additionally the potential of total reflection X-ray fluorescence–X-ray absorption near edge structure (SR-TXRF-XANES) for speciation of FeII/III down to amounts of 34 pg in aerosols which were collected for 1 h is shown. The aerosols were collected in the city of Hamburg with a low pressure Berner impactor on Si carriers covered with silicone over time periods of 60 and 20 min each. The particles were collected in four and ten size fractions of 10.0–8.0 ?m, 8.0–2.0 ?m, 2.0–0.13 ?m 0.13–0.015 ?m (aerodynamic particle size) and 15–30 nm, 30–60 nm, 60–130 nm, 130–250 nm, 250–500 nm, 0.5–1 ?m, 1–2 ?m, 2–4 ?m, 4–8 ?m, 8–16 ?m. Prior to the sampling “bounce off” effects on Silicone and Vaseline coated Si carriers were studied with total reflection X-ray fluorescence. According to the results silicone coated carriers were chosen for the analysis. Additionally, blank levels originating from the sampling device and the calibration procedure were studied. Blank levels of Fe corresponded to 1–10% of Fe in the aerosol samples. Blank levels stemming from the internal standard were found to be negligible. The results from the Synchroton radiation total reflection X-ray fluorescence analysis of the aerosols showed that 20 min of sampling time gave still enough sample material for elemental determination of most elements. For the determination of the oxidation state of Fe in the aerosols different Fe salts were prepared as a reference from suspensions in isopropanol. The results from the Fe K-edge Synchroton radiation total reflection X-ray fluorescence-X-ray absorption near-edge structure analysis of the aerosol samples showed that mainly Fe(III) was present in all particle size fractions.

U.E.A. Fittschen; F. Meirer; C. Streli; P. Wobrauschek; J. Thiele; G. Falkenberg; G. Pepponi

2008-01-01T23:59:59.000Z