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1

XEMC Windpower Co Ltd formerly Hunan Hara XEMC Windpower Co Ltd | Open  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpenWende NewSowitec doWinvest Financing Service GmbHEnergy

2

Timken XEMC Hunan Bearings Co Ltd | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpenWende NewSowitec do Brasil EnergiaSurPV

3

Hunan Shenzhou Science Technology Co Ltd | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation,Ohio:GreerHiCalifornia: Energy Resources Jump to: navigation,53. ItHunan

4

CFD Simulation and Measurement Validation of Air Distribution at the Hunan International Exhibition Center  

E-Print Network [OSTI]

The Hunan International Exhibition Center (HIEC) is a large space building. A stratified air-conditioning system on the second floor of the building has been adopted. Due to some problems with the air supply jet diffuser, CFD simulations were...

Deng, T.; Zhang, Q.; Zhang, G.; Yuan, H.

2006-01-01T23:59:59.000Z

5

O'Hara Township, Pennsylvania: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(Utility Company)ReferencesNuiqsut, Alaska:Nutley, New Jersey:1131245°,O'Hara

6

Metal contamination of soils and crops affected by the Chenzhou lead/zinc mine spill (Hunan, China)  

E-Print Network [OSTI]

Metal contamination of soils and crops affected by the Chenzhou lead/zinc mine spill (Hunan, China Avenue Edouard Belin, 31400 Toulouse, France b Department of Environmental Science, Hunan Agricultural polluted with As, Cd, Zn, Pb and Cu. The contamination levels were in the order of GYBNSZYNJTC showing

Mailhes, Corinne

7

THE STRONG TEST IDEAL Nobuo Hara y and Karen E. Smith \\Lambda  

E-Print Network [OSTI]

THE STRONG TEST IDEAL Nobuo Hara y and Karen E. Smith \\Lambda Let R be a Noetherian commutative ring containing a field. The test ideal, introduced by Hochster and Huneke in [HH1], has emerged as an important object associated to R. The test ideal can be defined as the largest ideal J of R such that JI

Smith, Karen E.

8

XEMC Spark Gansu JV | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpenWende NewSowitec doWinvest Financing Service GmbH

9

Hara Software Inc | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation,Ohio:Greer County is8584°, -79.954985°is aHanoverHanumanHappySoftware Inc

10

Hunan Copower EV Battery Co Ltd | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation,Ohio:GreerHiCalifornia: Energy Resources Jump to: navigation,53. It

11

Hara Environmental and Energy Management Solution | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat Jump to:Photon Place:Net JumpStrategy |Hammerfest Strom UKHara

12

Hunan Corun New Energy Co Ltd formerly Changsha Lyrun New Material Co Ltd |  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat Jump to:PhotonHolyName HousingIII Wind FarmWouldOpen Energy

13

MORPHING SPARSELY POPULATED DATA Susan Davidson , Carmem Hara, Anthony Kosky and Chris  

E-Print Network [OSTI]

be implemented for a particular DBMS or database schema, and it is desirable to move data from another database evolutions. In this abstract, we describe a prototype system called Morphase (an enzyme for data morphing

Hara, Carmem Satie

14

Quasi-optic synthetic phased-array terahertz John O'Hara and D. Grischkowsky  

E-Print Network [OSTI]

in the form of broadband (typically 0.05­2.5 THz), coherent, transform-limited pulses,5 this THz ra- diation­10 that are often strongly absorptive. On the other hand, many vi- sually opaque and, in fact, most dry, nonpolar types of THz imaging systems already exist, all having different meritorious properties. One such sys

15

Yongheng Zhang - Department of Mathematics, Purdue University  

E-Print Network [OSTI]

Earlier than that, I attended Central South University, Changsha, Hunan, China P.R. and had a degree of Bachelor of Engineering in Automation (Auto 0313)...

16

Alternative Fuel Transportation Program  

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

Merit Review: EPAct State and Alternative Fuel Provider Fleets "Alternative Fuel Transportation Program" Dana O'Hara, DOE Ted Sears, NREL Vehicle Technologies Program June 20,...

17

E-Print Network 3.0 - aleatorio controlados recomendaciones Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

la... ) Calcular la probabilidad del suceso X > 0. b) Que recomendacion de carga maxima se hara al vender Source: Martell, Jos Mara - Departamento de...

18

The Path to Savings: Understanding the Federal Purchase of Energy-Consuming Products  

E-Print Network [OSTI]

the McNamara- O'Hara Service Contract Act of 1965, and (3) $Order Supply&Service Contract Construction Contract

Taylor, Margaret

2014-01-01T23:59:59.000Z

19

Microsoft Word - NETL-TRS-5-2014_High-Temperature, High-Pressure...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Road, Pittsburgh, PA 15236 3 University of Pittsburgh, Department of Chemical and Petroleum Engineering, Benedum Hall, 3700 O'Hara Street, Pittsburgh, PA 15261 4 Virginia...

20

The Application of Frequency-Conversion Technology in Groundwater Source Heat Pump System Reconstruction  

E-Print Network [OSTI]

Deep well pump power is relatively ubiquitous in the groundwater heat pump air-conditioning system in some hotels in Hunan, and the heat pump usually meets the change of the load by throttling. Therefore, frequency conversion technology is proposed...

Dai, X.; Song, S.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hunan hara xemc" 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

Published: October 26, 2011 r 2011 American Chemical Society 9719 dx.doi.org/10.1021/es2018048 |Environ. Sci. Technol. 2011, 45, 97199725  

E-Print Network [OSTI]

Normal University, Changsha, Hunan 410081, China Soil and Water Science Department and ) Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611, United States § State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu

Ma, Lena

22

4th U.S.-China Energy Efficiency Forum Agenda  

Broader source: Energy.gov (indexed) [DOE]

Envoy for Climate Change, State Department MOU Signing Ceremony 10:10-10:30 * CESI-CIE-LBNL MOU on Green Data Centers * Hunan University- Changsha Maxxom-University of Colorado...

23

E-Print Network 3.0 - adp single crystals Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

force Yoko Hirono-Hara* Summary: the rotation and catalytic event. ADP inhibition ATP synthase F1-ATPase magnetic tweezers single... , and the two are bound with ATP and...

24

Service Category: Outreach Organization: Music in Medicine  

E-Print Network [OSTI]

: Cynthia Chen Email: cchen@med.wayne.edu Off site Contact: Erin O' Hara Address: Children's Hospital) 745-5312 Off site Contact: Stacey Lincoln Address: 4100 John R, Detroit, Michigan 48201 Phone: (313

Finley Jr., Russell L.

25

Nuclear Instruments and Methods in Physics Research A 513 (2003) 585595 The RPI multiplicity detector response to g-ray cascades  

E-Print Network [OSTI]

Nuclear Instruments and Methods in Physics Research A 513 (2003) 585­595 The RPI multiplicity Physics, School of Science, National University of Defense Technology, Changsha, Hunan, 410073, People's Republic of China b Department of Mechanical, Aerospace and Nuclear Engineering, Rensselear Polytechnic

Danon, Yaron

26

A Digital Watermarking Approach to Secure and Precise Range Query Processing in Sensor Networks  

E-Print Network [OSTI]

of sending to the sink via multiple hops, which saves energy for sensors. Second, storage nodes store sensor or incomplete query results to the sink. In this paper, we aim to design a secure protocol that allows storage, Changsha, Hunan, 41008, China BloomReach Inc., Mountain View, CA 94041 Department of Computer Science

Liu, Alex X.

27

Understanding 2D critical percolation from Harris to Smirnov and beyond  

E-Print Network [OSTI]

Understanding 2D critical percolation from Harris to Smirnov and beyond Oded Schramm http? Harris 1960 / Kesten 1980: no for d = 2. Hara & Slade 1990: no if d 19. 5 #12;Specialize to critical;Triangular lattice, site percolation (TG): 8 #12;Triangular lattice, site percolation (TG): 9 #12;The Harris

Narasayya, Vivek

28

GREQAMGroupement de Recherche en Economie Quantitative d'Aix-Marseille -UMR-CNRS 6579  

E-Print Network [OSTI]

; Revised: October 2007 We would like to thank B. Decreuse, F. Deroian, R. Farmer, C. Hara, J. Stachurski of Economic Research, Kyoto University, July 2007, and at the Workshop on "Economic Theory and Dynamics integration may have destabilizing effects on a country's competitive equilibrium. Finally, we characterize

Paris-Sud XI, Université de

29

Carbon Storage in Young Growth Coast Redwood Stands  

E-Print Network [OSTI]

515 Carbon Storage in Young Growth Coast Redwood Stands Dryw A. Jones1 and Kevin L. O'Hara1 Abstract Carbon sequestration is an emerging forest management objective within California and around the dynamics of carbon sequestration and to accurately measure carbon storage is essential to insure successful

Standiford, Richard B.

30

401-C Allen Hall Department of Physics and Astronomy  

E-Print Network [OSTI]

401-C Allen Hall Department of Physics and Astronomy 3941 O'Hara Street Pittsburgh, PA 15260 for these problems. A few years ago, a physics and astronomy graduate student, Brian Cherinka, took a course you between a few members of our department of Physics and Astronomy (Michael Wood-Vasey, Arthur Kosowsky

Marai, G. Elisabeta "Liz"

31

Decay of an ultracold fermionic lithium gas near a Feshbach resonance The interactions between atoms can be strongly modified by tuning magnetic fields to  

E-Print Network [OSTI]

Decay of an ultracold fermionic lithium gas near a Feshbach resonance The interactions between the interaction strength is crucial in the search for a superfluid phase transition. Otherwise, the phase lithium gas near a Feshbach resonance, Phys. Rev. Lett. 89, 203201 (2002). 2. K.M. O'Hara, S.L. Hemmer, S

32

UTILITY MAXIMISATION AND UTILITY INDIFFERENCE PRICE FOR EXPONENTIAL  

E-Print Network [OSTI]

UTILITY MAXIMISATION AND UTILITY INDIFFERENCE PRICE FOR EXPONENTIAL SEMI-MARTINGALE MODELS WITH RANDOM FACTOR A. Ellanskaya1 and L. Vostrikova2 Abstract. We consider utility maximization problem to the conditional one, given = u, which we solve using dual approach. For HARA utilities we con- sider information

Boyer, Edmond

33

Census 2000 Demographic Profiles Allegheny County Municipalities  

E-Print Network [OSTI]

Township Emsworth Etna Fawn Findlay Forest Hills Forward Fox Chapel Franklin Park Frazer Glassport Heights Bethel Park Blawnox Brackenridge Braddock Braddock Hills Bradfordwoods Brentwood Bridgeville Oakdale Oakmont O'Hara Ohio Osborne Penn Hills Pennsbury Village Pine Pitcairn Pittsburgh City Pleasant

Sibille, Etienne

34

East Carolina University School of Music OperaTheater and The NEWMUSIC@ECU FESTIVAL  

E-Print Network [OSTI]

KimberlyWatson Allison Gross (cover and 3/27 perf.) Jennifer CarolineVaughan Anna Sara Mcbrayer Robert Mark Olivia Johnson Brooke Haney Lauren Langworthy Allison Gross Cayla Bryson Jake Mauk Mark Kevin Reames Christopher Hester MarshallWilliams ScottWillis Brenton O'Hara #12;The Production Team Stage Director ­ John

35

oj': kN/m2 `\\ 4.9 9.8 49 `\\+e_  

E-Print Network [OSTI]

and 490 kN/m'; (b) uj' values of 98 kN/m' and 392 kN/m' (Tatsuoka, Sakamoto, Kawamura & Fukushima, 1986 compression (Tatsuoka, Sakamoto Kawamura & Fukushima, 1986) Triaxial compression (Fukushima 8~ Tatsuoka, 1984 compression tests (Fukushima & Tatsuoka, 1984) (also Fig. 7) and torsional shear tests (Tatsuoka, Sonoda, Hara

Bolton, Malcolm

36

Optimal Design Refrigeration System for a Mucilage Glue Fiber Factory  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency Vol.IV-1-4 Optimal Design Refrigeration System for a Mucilage Glue Fiber Factory Chaoyi Tan Jianlong Liu Fennan Tang Yang Liu Hunan University of Technology... fiber ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency Vol.IV-1-4 2. REFRIGERATION SYSTEM SUPERIOR DESIGN PROPOSAL IN MUCILAGE GLUE FIBER FACTORY 2.1 Refrigeration system superior design proposal in mucilage glue fiber factory...

Tan, C.; Liu, J.; Tang, F.; Liu, Y.

2006-01-01T23:59:59.000Z

37

Stratigraphic and structural relationships of the sedimentary beds along the east flank of the Front Range in northern Colorado  

E-Print Network [OSTI]

Sundance was later deposited. Sundance Formation Definition. The type locality for this formation is north of Sundance, South Dakota. The Sundance consists of green shales and thin-bedded sandstones, and was described by Darton and O' Hara (1909, p. 3..., Nebraska, below the mouth of the Big Sioux River, Yellowish, reddish, and, more rarely, white sandstone beds with alternations of various colored clays and lignite beds comprise the Dakota Formation. The Dakota is about 400 feet thick at the type...

Gilmore, Walter Edgar

1965-01-01T23:59:59.000Z

38

The Beginning and the End  

E-Print Network [OSTI]

elseHhere. To his reliel', they did not. The creH members Hho had been aboard for some time Here well alqare of Vulcan ethics. 5 Spock came to him when he heard, "Captain, you would have saved yourself time if you 'had asked me about this," "i..., you oan't htt!:'t him." him "You rosent that, don't you? Just liko all tho others. ;,0 you try to pity for having no emotion"; - a freak Hho' 11 nover be HUnan like us." "Hhat's got into you? You're angry." "Is Hhat I said right?" "I suppose so...

Mason, Simone

1980-01-01T23:59:59.000Z

39

Ecological Technologies of a Chinese Traditional Folk House in Hot-Summer and Cold-Winter Zone  

E-Print Network [OSTI]

temperature in hottest month is 25?-30 ? and the average relative humidity is 80%. The hottest temperature is above 40 Renewable Energy Resources and a Greener Future Vol.VIII-4-5 Fig. 1 The first and second floor plane of 35# house in Yangshan Village... was conducted. 2.2 A Traditional Folk House Group: Yangshan Village This village is located on the Guiyang County in the south of Hunan province. The village was constructed in 1497 and the area of the village is about ten thousand squares. Today...

Xie, M.; Zhang, G.; Xu, F.

2006-01-01T23:59:59.000Z

40

A study of the error associated with global integration of differential equations  

E-Print Network [OSTI]

2 2 I- X cf W Jl- ? W O? Vl lg cc V Z 2 J 2 M VI Q J IU X O Q 2 0 I- 0 e Q VI J?IV ? 8 IU VflU R RS0 Ijl O II 0 J Y I- cf VQO 0 Vl Pl Pl Pl ~ ' 4 l 0 0 X I 0 Z IA 2 O X AII- N ? 0 25 VI 0 IU Z PI 0 d Pl a VINO... 1 +P (x) F(v)~ P&(v)-P&(v) dv 0 1 +Pg(x) F(v)~ Pg(v)-P2(v) dv+. . . . 0 0 'Hara also shows that 5 P& 1 (x)-P (x) = + x(1-x)P&(x); therefore, with more manipulation and the retention of the first m terms 1 y(xO+hx)='y(x )+h P (x) F(v) (1-v...

Farley, Arthur Reid

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "hunan hara xemc" 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

Light Water Reactor Sustainability Program A Reference Plan for Control Room Modernization: Planning and Analysis Phase  

SciTech Connect (OSTI)

The U.S. Department of Energys Light Water Reactor Sustainability (LWRS) program is collaborating with a U.S. nuclear utility to bring about a systematic fleet-wide control room modernization. To facilitate this upgrade, a new distributed control system (DCS) is being introduced into the control rooms of these plants. The DCS will upgrade the legacy plant process computer and emergency response facility information system. In addition, the DCS will replace an existing analog turbine control system with a display-based system. With technology upgrades comes the opportunity to improve the overall human-system interaction between the operators and the control room. To optimize operator performance, the LWRS Control Room Modernization research team followed a human-centered approach published by the U.S. Nuclear Regulatory Commission. NUREG-0711, Rev. 3, Human Factors Engineering Program Review Model (OHara et al., 2012), prescribes four phases for human factors engineering. This report provides examples of the first phase, Planning and Analysis. The three elements of Planning and Analysis in NUREG-0711 that are most crucial to initiating control room upgrades are: Operating Experience Review: Identifies opportunities for improvement in the existing system and provides lessons learned from implemented systems. Function Analysis and Allocation: Identifies which functions at the plant may be optimally handled by the DCS vs. the operators. Task Analysis: Identifies how tasks might be optimized for the operators. Each of these elements is covered in a separate chapter. Examples are drawn from workshops with reactor operators that were conducted at the LWRS Human System Simulation Laboratory HSSL and at the respective plants. The findings in this report represent generalized accounts of more detailed proprietary reports produced for the utility for each plant. The goal of this LWRS report is to disseminate the technique and provide examples sufficient to serve as a template for other utilities projects for control room modernization.

Jacques Hugo; Ronald Boring; Lew Hanes; Kenneth Thomas

2013-09-01T23:59:59.000Z

42

Unusual Water-mediated Antigenic Recognition of the Proinflammatory Cytokine Interleukin-18  

SciTech Connect (OSTI)

The unique cytokine interleukin-18 (IL-18) acts synergistically with IL-12 to regulate T-helper 1 and 2 lymphocytes and, as such, seems to underlie the pathogenesis of various autoimmune and allergic diseases. Several anti-IL-18 agents are in clinical development, including the recombinant human antibody ABT-325, which is entering trials for autoimmune diseases. Given competing cytokine/receptor and cytokine/receptor decoy interactions, understanding the structural basis for recognition is critical for effective development of anti-cytokine therapies. Here we report three crystal structures: the murine antibody 125-2H Fab fragment bound to human IL-18, at 1.5 {angstrom} resolution; the 125-2H Fab (2.3 {angstrom}); and the ABT-325 Fab (1.5 {angstrom}). These structures, along with human/mouse IL-18 chimera binding data, allow us to make three key observations relevant to the biology and antigenic recognition of IL-18 and related cytokines. First, several IL-18 residues shift dramatically (>10 {angstrom}) upon binding 125-2H, compared with unbound IL-18 (Kato, Z., Jee, J., Shikano, H., Mishima, M., Ohki, I., Ohnishi, H., Li, A., Hashimoto, K., Matsukuma, E., Omoya, K., Yamamoto, Y., Yoneda, T., Hara, T., Kondo, N., and Shirakawa, M. (2003) Nat. Struct. Biol. 10, 966-971). IL-18 thus exhibits plasticity that may be common to its interactions with other receptors. Related cytokines may exhibit similar plasticity. Second, ABT-325 and 125-2H differ significantly in combining site character and architecture, thus explaining their ability to bind IL-18 simultaneously at distinct epitopes. These data allow us to define the likely ABT-325 epitope and thereby explain the distinct neutralizing mechanisms of both antibodies. Third, given the high 125-2H potency, 10 well ordered water molecules are trapped upon complex formation in a cavity between two IL-18 loops and all six 125-2H complementarity-determining regions. Thus, counterintuitively, tight and specific antibody binding may in some cases be water-mediated.

Argiriadi, Maria A.; Xiang, Tao; Wu, Chengbin; Ghayur, Tariq; Borhani, David W.; (Abbott)

2009-10-21T23:59:59.000Z

43

Shock tube and theoretical studies on the thermal decomposition of propane : evidence for a roaming radical channel.  

SciTech Connect (OSTI)

The thermal decomposition of propane has been studied using both shock tube experiments and ab initio transition state theory-based master equation calculations. Dissociation rate constants for propane have been measured at high temperatures behind reflected shock waves using high-sensitivity H-ARAS detection and CH{sub 3} optical absorption. The two major dissociation channels at high temperature are C{sub 3}H{sub 8} {yields} CH{sub 3} + C{sub 2}H{sub 5} (eq 1a) and C{sub 3}H{sub 8} {yields} CH{sub 4} + C{sub 2}H{sub 4} (eq 1b). Ultra high-sensitivity ARAS detection of H-atoms produced from the decomposition of the product, C{sub 2}H{sub 5}, in (1a), allowed measurements of both the total decomposition rate constants, k{sub total}, and the branching to radical products, k{sub 1a}/k{sub total}. Theoretical analyses indicate that the molecular products are formed exclusively through the roaming radical mechanism and that radical products are formed exclusively through channel 1a. The experiments were performed over the temperature range 1417-1819 K and gave a minor contribution of (10 {+-} 8%) due to roaming. A multipass CH{sub 3} absorption diagnostic using a Zn resonance lamp was also developed and characterized in this work using the thermal decomposition of CH{sub 3}I as a reference reaction. The measured rate constants for CH{sub 3}I decomposition agreed with earlier determinations from this laboratory that were based on I-atom ARAS measurements. This CH{sub 3} diagnostic was then used to detect radicals from channel 1a allowing lower temperature (1202-1543 K) measurements of k1a to be determined. Variable reaction coordinate-transition state theory was used to predict the high pressure limits for channel (1a) and other bond fission reactions in C{sub 3}H{sub 8}. Conventional transition state theory calculations were also used to estimate rate constants for other tight transition state processes. These calculations predict a negligible contribution (<1%) from all other bond fission and tight transition state processes, indicating that the bond fission channel (1a) and the roaming channel (1b) are indeed the only active channels at the temperature and pressure ranges of the present experiments. The predicted reaction exo- and endothermicities are in excellent agreement with the current version of the Active Thermochemical Tables. Master equation calculations incorporating these transition state theory results yield predictions for the temperature and pressure dependence of the dissociation rate constants for channel 1a. The final theoretical results reliably reproduce the measured dissociation rate constants that are reported here and in the literature. The experimental data are well reproduced over the 500-2500 K and 1 x 10{sup -4} to 100 bar range (errors of {approx}15% or less) by the following Troe parameters for Ar as the bath gas: k{sub {infinity}} = 1.55 x 10{sup 24}T{sup -2.034} exp(-45490/T) s{sup -1}, k{sub 0} = 7.92 x 10{sup 53}T{sup -16.67} exp(-50380/T) cm{sup 3} s{sup -1}, and F{sub c} = 0.190 exp(-T/3091) + 0.810 exp(-T/128) + exp(-8829/T).

Sivaramakrishnan, R.; Su, M.-C.; Michael, J. V.; Klippenstein, S. J.; Harding, L. B.; Ruscic, B. (Chemical Sciences and Engineering Division)

2011-04-21T23:59:59.000Z