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1

Atw.hu - Atw.hu - Wiki  

U.S. Energy Information Administration (EIA)

? Data Encyclopedia Wiki by Comjuice.com about atw.hu. . Contact: , . Atw.hu is a website owned by Atw.hu, registered with the tld .hu, and name Atw.hu. Atw.hu ...

2

JA  

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

JA JA ' ''l) u.s. DEPARTMENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NEPA DETERMINATION RECIPIENT:Arizona Geological Survey PROJECf TITLE: AASG Stale Geological Survey Contributions to the NGDS_ OK Page I of2 STATE: OK Funding Opportunity Announc:ement Number Procurement Instrument Number NEPA Control Number em Number 0CXl2850 DE·EEOOO2850 GF0-0002850-0K1 0 Based on my review of the information concerning the proposed action, as NEPA Compliance Offictr (authorized undu DOE Ordn 451.IA). I han made the following determination: ex, EA, [IS APPENDIX AND NUMBER: Description: 83.1 Site characterization and environmental monitoring Srte charactenzabon and environmental monitoong (induding, but not limited to, siting, construction, modificatioo, operation,

3

Shih-Cheng Hu  

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

Shih-Cheng Hu Shih-Cheng Hu Dr./Professor Department of Energy and Refrigerating Air-Conditioning Engineering National Taipei University of Technology This speaker was a visiting speaker who delivered a talk or talks on the date(s) shown at the links below. This speaker is not otherwise associated with Lawrence Berkeley National Laboratory, unless specifically identified as a Berkeley Lab staff member. Dr. Shih-Cheng Hu is a Professor in the Department of Energy and Refrigerating Air-Conditioning Engineering and the director of Center for Cleanroom Technology Research, National Taipei University of Technology. He is also the secretary general of the Taiwan Clean Technology Association (TCTA), which has more than 500 individual members and 50 company members from facility department of high-tech companies in Taiwan. In the past 18

4

HU-Mannschaft bei RoboCup-WM in China  

E-Print Network (OSTI)

WAS KOMMT Vorlesung zur deutsch- britischen Geschichte Das Gro�britannien-Zentrum der HU lädt ein Ehrendoktorwürde an Gerhard Ertl verliehen Der Chemie-Nobelpreisträger Gerhard Ertl erhielt am 16. Ja- nuar die Darwin bis heute. Thema: ,,Charles Darwin und der deutsche Darwin. Zur Hae- ckelrezeption im 20. Jahrhun

Röder, Beate

5

ATW Internet - nyfgtfk.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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6

ATW Internet - ibolyalang.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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7

ATW Internet - szbszig.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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8

ATW Internet - hurkatoltesi.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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9

ATW Internet - animalfellow.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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10

ATW Internet - optibox.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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11

ATW Internet - hazidoga.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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12

ATW Internet - freesex.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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13

ATW Internet - rozsaszin.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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14

ATW Internet - aliquis.atw.hu - PageGlimpse.com  

U.S. Energy Information Administration (EIA)

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15

www.atw.co.hu - Atw - ATW Internet - Üdvözöljük  

U.S. Energy Information Administration (EIA)

atw.co.hu is 0 days years old.atw.co.hu is ranked #2351300 in the world. A high rank means that this website does not get lots of visitors.The average pages load time ...

16

HU CFRT Summer 1999 Fusion Science High School Workshop  

SciTech Connect

The 1999 HU CFRT Summer Fusion High School Workshop was conducted for eight weeks in the summer of 1999. The report is on this workshop.

Ali, H.

2000-07-01T23:59:59.000Z

17

Hinter Humboldts Tren Studierende der HU bieten drei-  

E-Print Network (OSTI)

Händen nicht den Fu�boden. Diese Ergebnisse einer Stu- die zur Kindergesundheit in Deutsch- land, die das Chemie der HU, bietet ab Juli Kurse zur naturwissen- schaftlichen Grundbildung für Schüler an. Einen Anmeldung gibt es im Internet unter www.chemie.hu- berlin.de/forschung/fachdidaktik/aktiv/elan. UNI F�R ALLE

Röder, Beate

18

ATW Internet - k500i.atw.hu - PageSpan.com  

U.S. Energy Information Administration (EIA)

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19

E85- ja E10- polttoaineiden suorituskyvyn ja kulutuksen vertailu.  

E-Print Network (OSTI)

??Tämän opinnäytetyön keskeisenä tavoitteena oli selvittää E85- ja E10- polttoaineiden suorituskyvyn ja kulutuksen eroja tasaisilla nopeuksilla 80 km/h, 100 km/h ja 120 km/h. Lisäksi työssä… (more)

Somerkallio, Heikki

2013-01-01T23:59:59.000Z

20

LED- ja loisteputkivalon vaikutus maitotaloustuotteiden ja perunan laatuun.  

E-Print Network (OSTI)

??Tutkielman kirjallisuuskatsauksessa tarkasteltiin valoa, erilaisia valonlähteitä ja niiden ominaisuuksia. Erityisesti keskityttiin LED (Light Emitting Diode) valoon ja sen ominaisuuksiin, koska sen käyttö myös yleisessä valaistuksessa… (more)

Solala, Kari

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hu ja ru" 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

Hai-Hu Wen 072612 - Argonne National Laboratories, Materials Sicence  

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

Hai-Hu Wen 072612 Hai-Hu Wen 072612 MATERIALS SCIENCE COLLOQUIUM SPEAKER: Professor Hai-Hu Wen Nanjing University China TITLE: "Materials and Pairing Mechanism in Iron Pnictides/Chalcogenides: What We Have Learnt and What Are Left" DATE: Thursday, July 26, 2012 TIME: 11:00 am PLACE: Building 212 / A-157 ABSTRACT: I will give a brief survey of the material and experimental status in the new iron based superconductors. The transport, thermodynamics, penetration depth and tunneling experiments have revealed clearly the existence of multiband superconductivity. The NMR, inelastic neutron scattering, etc., have uncovered the intimate relationship between the superconductivity and the fluctuating antiferromagnetism. In many measurements a full-gap feature is favored, although a distinction remains

22

Biovedyn ja biokaasun yhteistuotanto : Koelaitteiston suunnittelu, rakentaminen ja käyttöönotto.  

E-Print Network (OSTI)

??Erilaisista biomassoista tuotettua biovetyä ja biokaasua pidetään lupaavina energialähteinä korvaamaan fossiilisia polttoaineita. Biokaasun tuotanto edustaa jo vakiintunutta teknologiaa, kun taas biovetyteknologia on vielä kehitysvaiheessa. Tässä… (more)

Salmela, Milla

2011-01-01T23:59:59.000Z

23

SUPPORT FOR HU CFRT SUMMER HIGH SCHOOL FUSION WORKSHOP  

SciTech Connect

Nine summer fusion science research workshops for minority and female high school students were conducted at the Hampton University Center for Fusion Research and Training from 1996 to 2005. Each workshop was of the duration of eight weeks. In all 35 high school students were mentored. The students presented 28 contributed papers at the annual meetings of the American Physical Society Division of Plasma Physics. These contributed papers were very well received by the plasma physics and fusion science research community. The students won a number of prestigious local, state, and national honors, awards, prizes, and scholarships. The notable among these are the two regional finalist positions in the 1999 Siemens-Westinghouse Science and Technology Competitions; 1st Place U.S. Army Award, 2006; 1st Place U.S. Naval Science Award, 2006; Yale Science and Engineering Association Best 11th Grade Project, 2006; Society of Physics Students Book Award, 2006; APS Corporate Minority Scholarship and others. This workshop program conducted by the HU CFRT has been an exemplary success, and served the minority and female students exceptionally fruitfully. The Summer High School Fusion Science Workshop is an immensely successful outreach activity conducted by the HU CFRT. In this workshop, we train, motivate, and provide high quality research experiences to young and talented high school scholars with emphasis on under-represented minorities and female students in fusion science and related areas. The purpose of this workshop is to expose minority and female students to the excitement of research in science at an early stage in their academic lives. It is our hope that this may lead the high school students to pursue higher education and careers in physical sciences, mathematics, and perhaps in fusion science. To our knowledge, this workshop is the first and only one to date, of fusion science for under-represented minorities and female high school students at an HBCU. The faculty researchers in the HU CFRT mentor the students during summers. Mentors spend a considerable amount of time and efforts in training, teaching, guiding and supervising research projects. The HU CFRT has so far conducted nine workshops during the summers of 1996-2000 and 2002-2005. The first workshop was conducted in summer 1996. Students for the workshop are chosen from a national pool of exceptionally talented high school rising seniors/juniors. To our knowledge, most of these students have gone on to prestigious universities such as Duke University, John Hopkins University, CalTech, UCLA, Hampton University, etc. after completing their high school. For instance, Tiffany Fisher, participant of the 1996 summer workshop completed her BS in Mathematics at Hampton University in May 2001. She then went on to Wake Forest University at Winston-Salem, North Carolina to pursue graduate studies. Anshul Haldipur, participant of the 1999 summer workshop, began his undergraduate studies at Duke University in 2000. Christina Nguyen and Ilissa Martinez, participants of the 2000 summer workshop, are pursuing their undergraduate degrees at the UCLA and Florida State University respectively. The organizing committee of the APS DPP annual meeting invited Dr. Punjabi to deliver an invited talk on training the next generation of fusion scientists and engineers at the 2005 APS DPP meeting in Denver, CO. The organizing committee distributed a special flier with the Bulletin to highlight this invited talk and another talk on education as well the expo. This has given wide publicity and recognition to our workshops and Hampton University. Prof. Punjabi's talk: 'LI2 2: Training the next generation of fusion scientists and engineers: summer high school fusion science workshop, Bull. Amer. Phys. Soc. 50, 221 (2005)' was very well-received. He talked about HU education and outreach initiative and the HU CFRT Summer High School Workshop. The audience had a considerable number of questions about our workshops and the High School to PhD Pipeline in fusion science. Professor William Mathews of

Alkesh Punjabi

2010-02-09T23:59:59.000Z

24

SUPPORT FOR HU CFRT SUMMER HIGH SCHOOL FUSION WORKSHOP  

Science Conference Proceedings (OSTI)

Nine summer fusion science research workshops for minority and female high school students were conducted at the Hampton University Center for Fusion Research and Training from 1996 to 2005. Each workshop was of the duration of eight weeks. In all 35 high school students were mentored. The students presented 28 contributed papers at the annual meetings of the American Physical Society Division of Plasma Physics. These contributed papers were very well received by the plasma physics and fusion science research community. The students won a number of prestigious local, state, and national honors, awards, prizes, and scholarships. The notable among these are the two regional finalist positions in the 1999 Siemens-Westinghouse Science and Technology Competitions; 1st Place U.S. Army Award, 2006; 1st Place U.S. Naval Science Award, 2006; Yale Science and Engineering Association Best 11th Grade Project, 2006; Society of Physics Students Book Award, 2006; APS Corporate Minority Scholarship and others. This workshop program conducted by the HU CFRT has been an exemplary success, and served the minority and female students exceptionally fruitfully. The Summer High School Fusion Science Workshop is an immensely successful outreach activity conducted by the HU CFRT. In this workshop, we train, motivate, and provide high quality research experiences to young and talented high school scholars with emphasis on under-represented minorities and female students in fusion science and related areas. The purpose of this workshop is to expose minority and female students to the excitement of research in science at an early stage in their academic lives. It is our hope that this may lead the high school students to pursue higher education and careers in physical sciences, mathematics, and perhaps in fusion science. To our knowledge, this workshop is the first and only one to date, of fusion science for under-represented minorities and female high school students at an HBCU. The faculty researchers in the HU CFRT mentor the students during summers. Mentors spend a considerable amount of time and efforts in training, teaching, guiding and supervising research projects. The HU CFRT has so far conducted nine workshops during the summers of 1996-2000 and 2002-2005. The first workshop was conducted in summer 1996. Students for the workshop are chosen from a national pool of exceptionally talented high school rising seniors/juniors. To our knowledge, most of these students have gone on to prestigious universities such as Duke University, John Hopkins University, CalTech, UCLA, Hampton University, etc. after completing their high school. For instance, Tiffany Fisher, participant of the 1996 summer workshop completed her BS in Mathematics at Hampton University in May 2001. She then went on to Wake Forest University at Winston-Salem, North Carolina to pursue graduate studies. Anshul Haldipur, participant of the 1999 summer workshop, began his undergraduate studies at Duke University in 2000. Christina Nguyen and Ilissa Martinez, participants of the 2000 summer workshop, are pursuing their undergraduate degrees at the UCLA and Florida State University respectively. The organizing committee of the APS DPP annual meeting invited Dr. Punjabi to deliver an invited talk on training the next generation of fusion scientists and engineers at the 2005 APS DPP meeting in Denver, CO. The organizing committee distributed a special flier with the Bulletin to highlight this invited talk and another talk on education as well the expo. This has given wide publicity and recognition to our workshops and Hampton University. Prof. Punjabi's talk: 'LI2 2: Training the next generation of fusion scientists and engineers: summer high school fusion science workshop, Bull. Amer. Phys. Soc. 50, 221 (2005)' was very well-received. He talked about HU education and outreach initiative and the HU CFRT Summer High School Workshop. The audience had a considerable number of questions about our workshops and the High School to PhD Pipeline in fusion science. Professor William Mathews of

Alkesh Punjabi

2010-02-09T23:59:59.000Z

25

Windows Phone 7:n ja Androidin kommunikointi.  

E-Print Network (OSTI)

??Opinnäytetyössä tutkittiin älypuhelimien kommunikointia ja datan siirtoa. Älypuhelimet siirtävät tietoa palvelimen kautta toisille älypuhelimille, tämä mahdollistaa keskitetyn ja hallittavan tiedonsiirron. Opinnäytetyössä tutkittiin Windows Phone 7-… (more)

Vuolle, Jani

2013-01-01T23:59:59.000Z

26

Windows 8 : Uudet ominaisuudet ja muutokset.  

E-Print Network (OSTI)

??Tämä opinnäytetyö esittelee Microsoft Windows 8 -käyttöjärjestelmän uusia ominaisuuksia ja parannuksia Microsoftin edellisiin käyttöjärjestelmiin. Opinnäytetyön tavoitteena on hahmottaa Windows 8 -käyttöjärjestelmän näkyvimpiä udistuksia ja sitä,… (more)

Ylioja, Ilkka-Aleksi

2013-01-01T23:59:59.000Z

27

Jätteenkeräyksen ja -siirron yhteiskunnalliset kustannukset Punavuoressa – Tarkastelussa seka-, bio-, kartonki- ja paperijäte.  

E-Print Network (OSTI)

??Tämän pro gradu -tutkielman tarkoituksena on määrittää jätteenkeräyksen ja -siirron yhteiskunnalliset kustannukset valitulla tutkimusalueella Helsingin Punavuoressa. Jätteenkeräyksen ja -siirron kustannukset vastaavat suuruudeltaan merkittävää osaa jätehuollon… (more)

Kuvaja, Eveliina

2011-01-01T23:59:59.000Z

28

Applications of Underwater Technology on Underwater Archaeology:The Search for Underwater Cultural Heritage in Peng-Hu Sea Area.  

E-Print Network (OSTI)

??The purpose of this paper is to investigate the survey strategy for marine archaeology using modern underwater survey and identification instruments and techniques on Peng-Hu… (more)

Chen, Wei-Cheng

2010-01-01T23:59:59.000Z

29

JA  

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

toilets, and showerheads) , heating, ventilation , and air conditioning systems, and appliances; installation of drip-irrigation systems; improvements in generator efficiency...

30

Minkkien plasmasytoosiin sairastumisen ja hedelmällisyysominaisuuksien perinnölliset tunnusluvut.  

E-Print Network (OSTI)

??Tutkimuksen tarkoituksena oli tarkastella plasmasytoosiin sairastumisalttiuden geneettistä vaihtelua minkeillä ja selvittää plasmasytoosin yhteyksiä hedelmällisyysominaisuuksiin. Tutkimusaineisto saatiin Suomen Turkiseläinten Kasvattajain Liitto ry:ltä. Aineisto sisälsi yhden turkistilan… (more)

Häkli, Katja

2013-01-01T23:59:59.000Z

31

4-XC Calutron;5-JA Calutron  

E-Print Network (OSTI)

cyclotron was plaoed ig a chlorine arc in tho JA unit andfor the conditions used, chlorine gas was not noeded either

Sowell, D.

2010-01-01T23:59:59.000Z

32

AOCS Official Method Ja 2a-46  

Science Conference Proceedings (OSTI)

Moisture AOCS Official Method Ja 2a-46 Methods Downloads Methods Downloads DEFINITION This method determines the moisture by distillation with an immiscible solvent. SCOPE This metho

33

LED- ja loisteputkivalon vaikutus pakastettujen elintarvikkeiden laatuun.  

E-Print Network (OSTI)

??Tutkielman kirjallisuuskatsauksessa tarkasteltiin valoa, yleisimpiä valon lähteitä ja valon vaikutuksia elintarvikkeisiin. Erikseen käsiteltiin valon vaikutuksia pakastettujen elintarvikkeiden laatuun. Loisteputkivalon vaikutuksista pakastettuihin elintarvikkeisiin löytyi joitakin aikaisempia… (more)

Neffling, Jonna

2009-01-01T23:59:59.000Z

34

Alkoholituotteen tuotteistaminen ja markkinointi : Ufo Shot Original.  

E-Print Network (OSTI)

??Opinnäytetyössä käsitellään Ufo Shot Original – alkoholituotteen tuotekehitystä ja lanseerausta. Prosessin tavoite oli kehittää tuoteideasta Suomen alkoholimarkkinoilla menestyvä tuote. Ensisijainen tavoite oli ravintolamyynnin kasvatus, jonka… (more)

Pikkarainen, Joonas

2013-01-01T23:59:59.000Z

35

Effects of Capcitor Bank on Fault Ride Through Capibility of Induction Generator Hu, Y; Chen, Zhe  

E-Print Network (OSTI)

Effects of Capcitor Bank on Fault Ride Through Capibility of Induction Generator Hu, Y; Chen, Zhe Published in: Proceedings of the Asia-Pacific Power and Energy Engineering Conference, APPEEC 2010 DOI: 10., & Chen, Z. (2010). Effects of Capcitor Bank on Fault Ride Through Capibility of Induction Generator Based

Chen, Zhe

36

Windows 7 -käyttöjärjestelmän ominaisuudet, käyttö ja Windows XP -vertailu.  

E-Print Network (OSTI)

??Tämän opinnäytetyön tutkimuskohteena oli Windows 7 -käyttöjärjestelmä. Sen ominaisuuksia ja käyttöä arvioitiin käyttäjän näkökulmasta. Lisäksi selvitettiin mm. asennusvaihtoehtoja, käyttöjärjestelmän versioiden eroja ja toimintoihin sekä so-velluksiin… (more)

Nevala, Jukka

2010-01-01T23:59:59.000Z

37

Graphene Growth by Metal Etching on Ru (0001)  

E-Print Network (OSTI)

of step etching during graphene growth, such as in Fig. 3,adsorption of water on graphene structures will be describedRu(0001) Figure 5. a b c graphene Ru d Figure 6. Figure 7. a

Loginova, Elena

2010-01-01T23:59:59.000Z

38

AOCS Analytical Guidelines Ja 12-89  

Science Conference Proceedings (OSTI)

Analysis of Lecithin Co-Products AOCS Analytical Guidelines Ja 12-89 Methods Downloads Methods Downloads AOCS DEFINITION These guidelines identify standard methods that are recommended for th

39

AOCS Official Method Ja 7c-07  

Science Conference Proceedings (OSTI)

Determination of Lecithin Phospholipids by HPLC-LSD AOCS Official Method Ja 7c-07 Methods Downloads Methods Downloads DEFINITION This method describes a procedure for quantitative determination of phospholipids by

40

AOCS Official Method Ja 2b-87  

Science Conference Proceedings (OSTI)

Moisture, Karl Fischer Reagent AOCS Official Method Ja 2b-87 Methods Downloads Methods Downloads DEFINITION This method determines the actual water content of lecithins by titration with Fischer reagent which reac

Note: This page contains sample records for the topic "hu ja ru" 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

AOCS Official Method Ja 13-91  

Science Conference Proceedings (OSTI)

Determination of Tocopherols in Lecithin by HPLC AOCS Official Method Ja 13-91 Methods Downloads Methods Downloads DEFINITION This method quantitates the individual tocopherols in lecithin by HPLC, utilizing a tes

42

AOCS Official Method Ja 3-87  

Science Conference Proceedings (OSTI)

Hexane-Insoluble Matter AOCS Official Method Ja 3-87 Methods Downloads Methods Downloads DEFINITION This method determines the substances insoluble in hexane under the conditions of the test. SCOPE...

43

AOCS Official Method Ja 4-46  

Science Conference Proceedings (OSTI)

Acetone-Insoluble Matter AOCS Official Method Ja 4-46 Methods Downloads Methods Downloads DEFINITION This method determines the acetone-insoluble matter under the conditions of the test, free from sand, meal, and

44

AOCS Official Method Ja 6-55  

Science Conference Proceedings (OSTI)

Acid Value AOCS Official Method Ja 6-55 Methods Downloads Methods Downloads DEFINITION The acid value is the mg of sodium hydroxide necessary to neutralize the acids in 1 g of test sample. SCOPE...

45

AOCS Official Method Ja 14-91  

Science Conference Proceedings (OSTI)

Iodine Value, Wijs Method AOCS Official Method Ja 14-91 Methods Downloads Methods Downloads DEFINITION The iodine value (IV) is a measure of the content of unsaturated fatty acids. The test sample is reacted with

46

AOCS Official Method Ja 10-87  

Science Conference Proceedings (OSTI)

Brookfield Viscosity AOCS Official Method Ja 10-87 Methods Downloads Methods Downloads DEFINITION This method determines the viscosity in centipoises of a fluid lecithin at a specified temperature.

47

AOCS Official Method Ja 11-87  

Science Conference Proceedings (OSTI)

Viscosity of Transparent Liquids by Bubble Time Method AOCS Official Method Ja 11-87 Methods Downloads Methods Downloads DEFINITION The viscosity of a liquid is the resistance experienced by one portion of the liq

48

AOCS Official Method Ja 9-87  

Science Conference Proceedings (OSTI)

Gardner Color AOCS Official Method Ja 9-87 Methods Downloads Methods Downloads DEFINITION This method determines lecithin color by comparison of an undiluted test sample to standards of a specified color. ...

49

Graphene on Ru(0001): Evidence for two graphene band structures  

Science Conference Proceedings (OSTI)

High-resolution photoemission illustrates that the band structure of graphene on Ru(0001) exhibits a well-defined splitting. This splitting is largest with the graphene directly on the Ru(0001) substrate, whereas with a chemisorbed oxygen spacer layer between the graphene and the metal substrate, this splitting is considerably reduced. This splitting is attributed to a combination of chemical interactions between graphene and Ru(0001) and to screening of the former by the latter, not spin-orbit coupling.

Katsiev K.; Vescovo E.; Losovyj, Y.; Zhou, Z.; Liu, L.; Dowben, P.A.; Goodman, D.W.

2012-05-03T23:59:59.000Z

50

Graphene on Ru(0001): Evidence for two graphene band structures  

Science Conference Proceedings (OSTI)

High-resolution photoemission illustrates that the band structure of graphene on Ru(0001) exhibits a well-defined splitting. This splitting is largest with the graphene directly on the Ru(0001) substrate, whereas with a chemisorbed oxygen spacer layer between the graphene and the metal substrate, this splitting is considerably reduced. This splitting is attributed to a combination of chemical interactions between graphene and Ru(0001) and to screening of the former by the latter, not spin-orbit coupling.

Katsiev, Khabibulakh; Losovyj, Yaroslav; Zhou, Zihao; Vescovo, E; Liu, L.; Dowben, P. A.; Goodman, D. Wayne

2012-01-01T23:59:59.000Z

51

Segregation of Ru to Edge Dislocations in Uranium Dioxide  

Science Conference Proceedings (OSTI)

Presentation Title, Segregation of Ru to Edge Dislocations in Uranium Dioxide. Author(s), Anuj Goyal, Bowen Deng, Minki Hong, Aleksandr Chernatynskiy, ...

52

Graphene Growth by Metal Etching on Ru (0001)  

Science Conference Proceedings (OSTI)

Low-energy electron microscopy (LEEM) reveals a new mode of graphene growth on Ru(0001) in which Ru atoms from a step edge are injected under a growing graphene sheet. The injected atoms can form under-graphene islands, or incorporate into the topmost Ru layer, thereby increasing its density and forming dislocation networks. Density functional calculations imply that Ru islands nucleated between the graphene layer and the substrate are energetically stable; scanning tunneling microscopy (STM) reveals that dislocation networks exist near step edges.

Loginova, Elena; Maier, Sabine; Stass, Ingeborg; Bartelt, Norman; Feibelman, Peter; Salmeron, Miquel; McCarty, Kevin

2009-09-14T23:59:59.000Z

53

Methanol oxidation on PtRu electrodes. Influence of surface structure and Pt-Ru atom distribution  

Science Conference Proceedings (OSTI)

The activities of different types of PtRu catalysts for methanol oxidation are compared. Materials used were: UHV-cleaned PtRu alloys, UHV-evaporated Ru onto Pt(111) as well as adsorbed Ru on Pt(111) prepared with and without additional reduction by hydrogen. Differences in the catalytic activity are observed to depend on the preparation procedure of the catalysts. The dependence of the respective catalytic activities upon the surface composition is reported. UHV-STM data for Pt(111)/Ru show the formation of two- and three-dimensional structures depending on surface coverage. A molecular insight on the electrochemical reaction is given via in situ infrared spectroscopy. Analysis of the data indicates that the most probable rate-determining step is the reaction of adsorbed CO with Ru oxide.

Iwasita, T.; Hoster, H.; John-Anacker, A.; Lin, W.F.; Vielstich, W.

2000-01-25T23:59:59.000Z

54

Hmelo, Bin Hu, Alamgir Karim, Martyn McLachlan, and Ron Jones (by phone)  

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

Meeting of the CNMS User Executive Committee Meeting of the CNMS User Executive Committee September 13, 2010 - ORNL Bldg 8600, Room C-152 Members attending: Venkat Gopalan (Chair), Mark Dadmun (Vice Chair), David Bucknall (Secretary), Tony Hmelo, Bin Hu, Alamgir Karim, Martyn McLachlan, and Ron Jones (by phone) CNMS representatives: Peter Cummings, Laura Edwards, Tony Haynes, Mike Simonson Meeting convened 6:10pm. Discussion was guided by Chair's slides (attached). CNMS update provided by Mike Simonson (slides attached). Discussed several suggestions for CNMS user program and for future UEC activities. See slides 7 and 9 in Chair's presentation and the following. For UEC * Include an Industry liaison in UEC telecons/meetings- invited by UEC * Alternatively, designate an At-Large position on UEC for industrial member (requires change to by-laws)

55

MAPPING HUMAN BRAIN FUNCTION WITH MRI AT 7 TESLA Xiaoping HU, Essa YACOUB, Josef PFEUFFER, Amir SCHUMEL,  

E-Print Network (OSTI)

MAPPING HUMAN BRAIN FUNCTION WITH MRI AT 7 TESLA Xiaoping HU, Essa YACOUB, Josef PFEUFFER, Amir of the BOLD response to neural activity increase with the field strength. With the establishment of a 7 Tesla at a magnetic field strength that significantly exceeds 4 Tesla. Functional mapping using echo-planar imaging

56

CALIPSO/CALIOP Cloud Phase Discrimination Algorithm YONGXIANG HU,* DAVID WINKER,* MARK VAUGHAN,* BING LIN,* ALI OMAR,* CHARLES TREPTE,*  

E-Print Network (OSTI)

In passive remote sensing, cloud thermodynamic phase (water or ice) information typically comes from the specCALIPSO/CALIOP Cloud Phase Discrimination Algorithm YONGXIANG HU,* DAVID WINKER,* MARK VAUGHAN The current cloud thermodynamic phase discrimination by Cloud-Aerosol Lidar Pathfinder Satellite Ob

Baum, Bryan A.

57

Internet- ja postikysely osallistavan suunnittelun menetelmänä Puijon metsäsuunnitteluprosessissa.  

E-Print Network (OSTI)

??Osallistavan suunnittelun määrä Suomessa on viime vuosina kasvanut huomattavasti. Asukaskyselyt ovat yksi tapa osallistaa asukkaita, ja ne sopivat erityisesti suuren yleisön osallistamiseen. Internetissä toteutetut asukaskyselyt… (more)

Nieminen, Laura

2010-01-01T23:59:59.000Z

58

Microsoft Windows Server 2003 -palvelimen asentaminen ja käyttöönotto yrityksessä Postituspojat.  

E-Print Network (OSTI)

??Opinnäytetyö toteutettiin yritysten Postituspojat ja HelmiTaito kanssa. Projektin tavoitteena oli saada Postituspojille toimiva uusi Microsoft Windows Server 2003 –palvelinympäristö. Uuden palvelinlaitteiston hankkiminen tuli Postituspojille ajankohtaiseksi… (more)

Virtanen, Ilkka

2009-01-01T23:59:59.000Z

59

Time-Resolved FT-IR Spectroscopy of CO Hydrogenation over Supported Ru Catalyst at 700K  

E-Print Network (OSTI)

H. In-Situ Spectroscopy of Catalysts 2004, 32-46. Basu, P. ;over Supported Ru Catalyst at 700 K Walter Wasylenko andAl 2 O 3 -supported, Ru catalyst (Aldrich, 5% Ru, Degussa

Wasylenko, Walter; Frei, Heinz

2008-01-01T23:59:59.000Z

60

Stopping the growth of particles to silica-supported mono-nuclear Ru hydride surface species by tuning silica with surface silanes  

E-Print Network (OSTI)

chemical grafting of Ru(COD)(COT) through a covalent Ru-Siof a pentane solution of Ru(COD)(COT) under 3 bars of H 2 inhigh temperatures of grafted Ru(COD)(COT), leading to stable

Berthoud, Romain

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hu ja ru" 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

High Pressure Pulse Radiolysis-Reduction Cyt c by Ru(II) Complexes  

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

The DV values for intramolecular electron transfer in (NH3)5RuII-His33 horse heart ferricytochrome c and (NH3)5RuII-His39 Candida krusei ferricytochrome c are -17.7 ...

62

Surface?modified RuO2?based thick film resistors using Nd:YAG laser  

Science Conference Proceedings (OSTI)

An RuO2?based thick film resistor (TFR) is a cermet?type resistor which consists of RuO2 particles and glass. Paste containing organic vehicles is printed onto an insulating substrate

E. Gofuku; T. Ogama; H. Takasago

1989-01-01T23:59:59.000Z

63

Complex of transferrin with ruthenium for medical applications. [Ru 97, Ru 103  

DOE Patents (OSTI)

A novel Ruthenium-transferrin complex, prepared by reacting iron-free human transferrin dissolved in a sodium acetate solution at pH 7 with ruthenium by heating at about 40/sup 0/C for about 2 hours, and purifying said complex by means of gel chromatography with pH 7 sodium acetate as eluent. The mono- or di-metal complex produced can be used in nuclear medicine in the diagnosis and/or treatment of tumors and abscesses. Comparitive results with Ga-67-citrate, which is the most widely used tumor-localizing agent in nuclear medicine, indicate increased sensitivity of detection and greater tumor uptake with the Ru-transferrin complex.

Richards, P.; Srivastava, S.C.; Meinken, G.E.

1980-11-03T23:59:59.000Z

64

PtRu/C electrocatalysts prepared using gamma and electron beam irradiation for methanol electrooxidation  

Science Conference Proceedings (OSTI)

PtRu/C electrocatalysts (carbon-supported PtRu nanoparticles) were prepared in a single step submitting water/2-propanol mixtures containing Pt(IV) and Ru(III) ions and the carbon support to gamma and electron beam irradiation. The electrocatalysts were ...

Dionisio F. Silva, Adriana N. Geraldes, Eddy S. Pino, Almir Oliveira Neto, Marcelo Linardi, Estevam V. Spinacé

2012-01-01T23:59:59.000Z

65

Design and Application of RuBee-Based Telemedicine Data Acquisition System  

Science Conference Proceedings (OSTI)

Telemedicine can be defined as the delivery of health care and sharing of medical knowledge over a distance using telecommunication. This paper introduced the new technology of RuBee, RuBee fills the drawback of RFID tags which have no network and cannot ... Keywords: RuBee, Telemedicine system, electronic patient record, emergency telemedicine

Xiaohua Yu; Xiangling Xia; Xuhui Chen

2011-05-01T23:59:59.000Z

66

Elektros energijos konversijos ? šilumin? šalt?ja vandenilio plazma tyrimai.  

E-Print Network (OSTI)

??Magistro darb? „ Elektros energijos konversija ? šilumin? šalt?ja vandenilio plazma tyrimai“ sudaro ?vadas, 2 skyriai, išvados, literat?ros s?rašas, 1 kompaktinis diskas. Darbo apimtis 43… (more)

Kupryt?,; Diana

2012-01-01T23:59:59.000Z

67

Structure and Electrocatalysis of Sputtered RuPt Thin-film Electrodes  

DOE Green Energy (OSTI)

The structural and electrochemical properties of RuPt thin-film electrodes fabricated by RF magnetron sputtering have been investigated. Grazing incidence X-ray diffraction data show a transition from a face-centered-cubic (fcc) to hexagonal-cubic-packed (hcp) structure as Ru percentage increases. The transition occurs gradually between 32-58% Ru, which is significantly different from the bulk RuPt phase diagram. The catalytic activity of the thin-film electrodes for methanol oxidation shows a broad peak near 40-60% Ru, consistent with previous reports. The relationship between catalytic activity and film structure is discussed and contrasted with previous investigations.

Kim, T-W

2005-02-02T23:59:59.000Z

68

The interactions of water and perfluorodiethyl ether on Ru(100)  

DOE Green Energy (OSTI)

We have studied the interactions of water and perfluorodiethyl ether on Ru(100) in order to model the effects of surface structure and humidity on the bonding and decomposition of perfluoroalkyl ether lubricants with metal surfaces. In order to understand the interactions on Ru(100), we have first investigated the interactions of each of these adsorbates alone on the clean surface. The interactions of water with Ru(100) have been studied using both thermal desorption spectroscopy (TDS) and electron energy loss spectroscopy (EELS). From these studies we conclude that a small amount of water dissociates on this surface (5--10% of a monolayer), but water is adsorbed in a predominantly molecular form on this surface with an increasing degree of hydrogen-bonding with increasing coverage. The effects of hydrogen and oxygen coadsorption on the interactions of water with this surface have also been studied using TDS. Finally, the interactions of coadsorbed water and perfluorodiethyl ether on Ru(100) have been investigated using TDS.

Leavitt, P.

1990-09-21T23:59:59.000Z

69

ESS 2012 Peer Review - Low-Cost, High-Performance Hybrid Membranes for Redox Flow Batteries - Hongxing Hu, Amsen Technologies  

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

DESIGN © 2008 DESIGN © 2008 www.PosterPresentations.com Low-Cost, High-Performance Hybrid Membranes for Redox Flow Batteries Hongxing Hu, Amsen Technologies LLC DOE SBIR Project, Program Manager at DOE: Dr. Imre Gyuk Objectives and Technical Approach Objectives: This SBIR project aims to develop low-cost, high performance hybrid polymeric PEMs for redox flow batteries (RFBs). Such membranes shall have high chemical stability in RFB electrolytes, high proton conductivity, low permeability of vanadium ions, along with high dimensional stability, high mechanical strength and durability, and lower cost than Nafion membranes. Approach: * Hybrid membranes of sulfonated polymers * Balance between different types of polymers for proton conductivity and chemical stability

70

Lagrangian H/U3 Values Computed around Fronts Using a Fine-Resolution Numerical Model and Ferryboat-Monitored SST Dataset  

Science Conference Proceedings (OSTI)

Front locations are identified as the local maximum of the sea surface temperature gradient revealed in the continuously ferryboat-monitored data in the Seto Inland Sea, Japan. In addition, Simpson and Hunter’s H/U3 values, where H is the water ...

Youn-Jong Sun; Atsuhiko Isobe

2008-11-01T23:59:59.000Z

71

CHINA'S SOFTWARE INDUSTRY CURRENT STATUS AND DEVELOPMENT STRATEIES Hongli Hu, Xi'an Jiaotong University, hhl@xjtu.edu.cn, Tel: +86-29-527-6916  

E-Print Network (OSTI)

CHINA'S SOFTWARE INDUSTRY ­ CURRENT STATUS AND DEVELOPMENT STRATEIES Hongli Hu, Xi'an Jiaotong: Although software industry in China is still at the primitive stage, with her huge personnel resource, the demands from her fast growing economy, and government's promotional policies, China will inevitably become

Lin, Zhangxi

72

Synthesis of Ru/multiwalled carbon nanotubes by microemulsion for electrochemical supercapacitor  

Science Conference Proceedings (OSTI)

An efficient way to decorate multiwalled carbon nanotubes with Ru had been developed. In this method, Ru nanoparticles were prepared by water-in-oil reverse microemulsion, and the produced Ru anchored on MWCNTs. Transmission electron microscopy (TEM) result showed that RuO{sub 2} nanoparticles had the uniform size distribution after electrochemical oxidation. Energy dispersive X-rays (EDX) spectra elucidated the presence of ruthenium oxide in the as-prepared composites after electrochemical oxidation. Cyclic voltammetry result demonstrated that a specific capacitance of deposited ruthenium oxide electrode was significantly greater than that of the pristine MWCNTs electrode in the same medium.

Yan Shancheng; Qu Peng; Wang Haitao; Tian Tian [State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Si Pai Lou 2, Nanjing 210096 (China); Xiao Zhongdang [State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Si Pai Lou 2, Nanjing 210096 (China)], E-mail: zdxiao@seu.edu.cn

2008-10-02T23:59:59.000Z

73

A tentative classification of the bya ru can kings of Zhang zhung  

E-Print Network (OSTI)

grags text 1 p. 22 lines 4-5). They comprised a white turban pierced with eagle feathers, and skins of white lynx, white wolf and stag gzig gung gsum (“tiger, leopard and another kind of wild cat”). Tibetan Studies in honor of Samten Karmay 390 le... wore a radiant jewelled bya ru (rin chen ’od kyi bya ru), another one emitting a rainbow radiance (gzha’ tshon ’od kyi bya ru), and the third a crown made of mother- of-pearl (un chen dung gis bya ru—un chen seemingly refers to a kind of mother...

Vitali, Roberto

2008-01-01T23:59:59.000Z

74

Oxygen adsorption on the Ru(10¯10) surface: Anomalous coverage dependence  

E-Print Network (OSTI)

Oxygen adsorption onto Ru(10¯10) results in the formation of two ordered overlayers, i.e. a c(2×4)-2O and a (2×1)pg-2O phase, which were analyzed by low-energy electron diffraction (LEED) and density functional theory (DFT) calculation. In addition, the vibrational properties of these overlayers were studied by high-resolution electron loss spectroscopy. In both phases, oxygen occupies the threefold coordinated hcp site along the densely packed rows on an otherwise unreconstructed surface, i.e. the O atoms are attached to two atoms in the first Ru layer Ru(1) and to one Ru atom in the second layer Ru(2), forming zigzag chains along the troughs. While in the low-coverage c(2×4)-O phase, the bond lengths of O to Ru(1) and Ru(2) are 2.08 ?A and 2.03 ?A, respectively, corresponding bond lengths in the high-coverage (2×1)-2O phase are 2.01 ?A and 2.04 ?A(LEED). Although the adsorption energy decreases by 220 meV with O coverage (DFT calculations), we observe experimentally a shortening of the Ru(1)-O bond length with O coverage. This effect could not be reconciled with the present DFT-GGA calculations. The ?(Ru-O) stretch mode is found at 67 meV [c(2×4)-2O] and 64 meV [(2×1)pg-2O]. I.

S. Schwegmann; A. P. Seitsonen; V. De Renzi; H. Dietrich; H. Bludau; M. Gierer; H. Over; K. Jacobi; M. Scheffler; G. Ertl

1997-01-01T23:59:59.000Z

75

Structural and physical properties of layered oxy-arsenides LnRuAsO (Ln=La, Nd, Sm, Gd)  

Science Conference Proceedings (OSTI)

Polycrystalline samples of LaRuAsO, NdRuAsO, SmRuAsO, and GdRuAsO have been synthesized and studied using powder x-ray diffraction, electrical transport, magnetization, and heat capacity measurements. Variations in structural properties across the series reveal a trend toward more ideal tetrahedral coordination around Ru as the size of the rare earth element is reduced. The lattice parameters of these Ru compounds show a more anisotropic response to variation in Ln than their Fe analogs, and significant anisotropy in thermal expansion is also observed. Transport measurements show metallic behavior, and carrier concentrations near 10{sup 21}-10{sup 22} electrons per cm{sup 3} are inferred from simple analysis of Hall effect measurements. Anomalies in resistivity, magnetization, and heat capacity indicate antiferromagnetic ordering of rare earth moments at 5 K for GdRuAsO, 4.5 K for SmRuAsO, and heat capacity of LaRuAsO, NdRuAsO, SmRuAsO, and GdRuAsO. Highlights: Black-Right-Pointing-Pointer Experimental investigation of LaRuAsO, NdRuAsO, SmRuAsO, and GdRuAsO. Black-Right-Pointing-Pointer Anisotropic lattice response to changing Ln radius and temperature. Black-Right-Pointing-Pointer Ru coordination becomes more ideal as Ln radius is reduced. Black-Right-Pointing-Pointer Transport measurements reveal metallic conduction dominated by electrons. Black-Right-Pointing-Pointer Magnetic measurements indicate antiferromagnetic ordering Nd, Sm, and Gd moments.

McGuire, Michael A., E-mail: McGuireMA@ornl.gov [Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); May, Andrew F.; Sales, Brian C. [Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)

2012-07-15T23:59:59.000Z

76

Crystallographic and magnetic phase transitions in the layered ruthenium oxy-arsenides TbRuAsO and DyRuAsO  

Science Conference Proceedings (OSTI)

The crystallographic and physical properties of TbRuAsO and DyRuAsO at and below room temperature are reported, including full structure refinements from powder X-ray diffraction data and measured electrical and thermal transport properties, magnetic susceptibility, and heat capacity. Both compounds are isostructural to LaFeAsO (ZrCuSiAs-type, P4/nmm) at room temperature. However, DyRuAsO undergoes a symmetry-lowering crystallographic phase transition near 25 K, and adopts an orthorhombic structure (Pmmn) below this temperature. This structural distortion is unlike those observed in the analogous Fe compounds. Magnetic phase transitions are observed in both compounds which suggest antiferromagnetic ordering of lanthanide moments occurs near 7.0 K in TbRuAsO and 10.5 K in DyRuAsO. The nature of the structural distortion as well as thermal conductivity and heat capacity behaviors indicate strong coupling between the magnetism and the lattice. The behaviors of both materials show magnetic ordering of small moments on Ru may occur at low temperatures.

McGuire, Michael A [ORNL; May, Andrew F [ORNL; Sales, Brian C [ORNL

2012-01-01T23:59:59.000Z

77

Intramolecular ET in Ru-Modified MnCyt c  

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

Tetraammine(L)ruthenium(III)-Modified Tetraammine(L)ruthenium(III)-Modified Manganocytochromes c Ji Sun and James F. Wishart Inorg. Chem. 37, 1124-1126 (1998) [Find paper at ACS Publications] or use ACS Articles on Request Abstract: Manganese-substituted horse heart cytochrome c was prepared by replacing the iron in the heme group according to established methods. The resulting manganicytochrome c was subsequently modified at histidine-33 with three ruthenium complexes trans-(NH3)4(L)Ru-His33, where L = NH3, pyridine or isonicotinamide. Proof of correct derivatization was obtained by atomic absorption analysis of manganese and ruthenium, differential pulse voltammetry and electrospray mass spectroscopy. Manganese(II)-to-ruthenium(III) intramolecular electron transfer rates were measured as a function of temperature by pulse radiolysis, using oxidation

78

patkanyok.atw.hu  

U.S. Energy Information Administration (EIA)

á é budapest callgirl egé eladó estimated fogott freewebsitereport hö internet internettudakozó ké kö kesí llati llattenyé ltató luxiportal lykö mobil ...

79

Efficient Generation of the LF Excited State of Tris-(bpy)-Ru(II)  

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

Generation of the Ligand Field Excited State of Generation of the Ligand Field Excited State of Tris-(2,2'-bipyridine)-ruthenium(II) through Sequential Two-Photon Capture by [Ru(bpy)3]2+ or Electron Capture by [Ru(bpy)3]3+ David W. Thompson, James F. Wishart, Bruce S. Brunschwig and Norman Sutin J. Phys. Chem. A, 105, 8117-8122 (2001) [Find paper at ACS Publications] Abstract: The relaxation dynamics and product distribution resulting from the decay of high lying excited states generated via sequential two-photon capture by [Ru(bpy)3]2+ or electron capture by [Ru(bpy)3]3+ have been investigated by flash photolysis and pulse radiolysis techniques. In comparison to the decay dynamics for monophotonic excitation, dramatically different relaxation dynamics have been observed. High-power flash excitation yields

80

diff -ruN oommf12a4pre-20100719/app/mmdisp/scripts ...  

Science Conference Proceedings (OSTI)

diff -ruN oommf12a4pre-20100719/app/mmdisp/scripts/mmdisp.tcl oommf12a4pre-20100719bis/app/mmdisp/scripts/mmdisp.tcl --- oommf12a4pre ...

2011-10-16T23:59:59.000Z

Note: This page contains sample records for the topic "hu ja ru" 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

The structure of mixed H2O-OH monolayer films on Ru(0001)  

E-Print Network (OSTI)

to study the structures produced by water on Ru(0001) atexposure to water at 180 K produced a higher coverage ofThis produced a strong modification in the water film

Tatarkhanov, M.

2008-01-01T23:59:59.000Z

82

In situ Ru K-edge x-ray absorption fine structure studies of electroprecipitated ruthenium dioxide films with relevance to supercapacitor applications.  

SciTech Connect

Modifications in electronic and structural aspects of RuO{sub 2} films electroprecipitated onto Au electrodes induced by changes in the applied potential have been examined in situ in aqueous 0.50 M H{sub 2}SO{sub 4} by Ru K-edge X-ray absorption spectroscopy (XAS). The Fourier transform of the k{sup 3}-weighted extended X-ray absorption fine structure (EXAFS), k{sup 3}x(k), for the film polarized at +1.20V vs RHE is characterized by two shells attributed to Ru-O and Ru-Ru interactions with average distances of 1.94(1) and 3.12(2) {angstrom}, respectively, in agreement with results obtained ex situ for Ru{sup 4+} in hydrous RuO{sub 2} by other groups. In contrast, films in the reduced state, i.e., +0.40 V vs RHE, yielded only a single shell ascribed to a Ru-O interaction at 2.02(1) {angstrom} with no evidence for a distant Ru-Ru shell. The long Ru-O distance is in agreement with that reported earlier for the hydrous Ru{sup 3+} ion [Ru-(OH{sub 2}){sub 6}]{sup 3+} in the solid state. Moreover, the difference between the average Ru-O bond lengths for the reduced and oxidized films is consistent with the difference in the ionic radii of Ru{sup 3+} and Ru{sup 4+}. On this basis it has been suggested that films in the reduced state contain Ru{sup 3+} sites, consistent with the electrochemical results, in a phase with apparently less order beyond the Ru-O coordination sphere than for hydrous RuO{sub 2}.

Mo, Y.; Antonio, M. R.; Stefan, I. C.; Scherson, D. A.; Chemistry; Case Western Reserve Univ.

2000-10-26T23:59:59.000Z

83

Schottky barrier height behavior of Pt-Ru alloy contacts on single-crystal n-ZnO  

SciTech Connect

We investigated the Schottky barrier height (SBH) behavior of binary alloy Schottky contacts on n-type zinc oxide (n-ZnO) single crystals. Pt-Ru alloy electrodes were deposited on the Zn-polar and O-polar faces of ZnO substrates by combinatorial ion-beam deposition under identical conditions. The crystal structures of the Pt-Ru alloy film changed from the Pt phase (cubic structure) to the Ru phase (hexagonal structure) in the Pt-Ru alloy phase diagram with decreasing Pt content. The SBH, determined from current-voltage measurements, decreased with decreasing Pt content, indicating that the SBH behavior also followed the Pt-Ru alloy phase diagram. The alloy electrodes on the Zn-polar face showed better Schottky properties than those on the O-polar face. Hard x-ray photoelectron spectroscopy revealed a difference in the interface oxidization of the Pt-Ru alloy: the interface of the O-polar face and Pt-Ru mixed phase with poor crystallinity had a more oxidized layer than that of the Zn-polar face. As a result of this oxidization, the O-polar face, Pt-Ru mixed, and Ru phases showed poor Schottky properties.

Nagata, T.; Haemori, M.; Hayakawa, R.; Yoshitake, M.; Chikyow, T. [Advanced Electronic Materials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Volk, J. [Research Institute for Technical Physics and Materials Science, H-1121 Budapest, Konkoly Thege Miklos ut 29-33 (Hungary); Yamashita, Y. [Advanced Electronic Materials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); NIMS Beamline Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148 (Japan); Yoshikawa, H.; Ueda, S.; Kobayashi, K. [NIMS Beamline Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148 (Japan)

2010-05-15T23:59:59.000Z

84

Astrophysical S-Factors and Reaction Rates of Threshold (p, n)-Reactions on {sup 99-102}Ru  

Science Conference Proceedings (OSTI)

Astrophysical S-factors of (p, n) reactions on {sup 99}Ru, {sup 100}Ru, {sup 101}Ru, and {sup 102}Ru were derived from the sum of experimental isomeric and ground states cross sections measured in the incident proton energy range of 5-9 MeV. They were compared with Hauser-Feshbach statistical model predictions of the NON-SMOKER code. Good agreement was found in the majority of cases. Reaction rates were derived up to 8.7 GK stellar temperature by combining experiment and theory.

Skakun, Ye. [Kharkiv Institute of Physics and Technology, Academicheskaja str., 1, 61108 Kharkiv (Ukraine); Rauscher, T. [Department of Physics, University of Basel, Klingelbergstr, 82, CH-4056 Basel (Switzerland)

2010-08-12T23:59:59.000Z

85

Direct Observation of the Kinetically Relevant Site of CO Hydrogenation on Supported Ru Catalyst at 700 K by Time-Resolved FT-IR Spectroscopy  

E-Print Network (OSTI)

In- Situ Spectroscopy of Catalysts; B.M. Weckhuysen, Ed. ;CO Hydrogenation on Supported Ru Catalyst at 700 K by Time-K. 1. Introduction Supported Ru catalysts are among the most

Wasylenko, Walter

2008-01-01T23:59:59.000Z

86

IBM-1 description of the fission products $^{108,110,112}$Ru  

E-Print Network (OSTI)

IBM-1} calculations for the fission products $^{108,110,112}$Ru have been carried out. The even-even isotopes of Ru can be described as transitional nuclei situated between the U(5) (spherical vibrator) and SO(6) ($\\gamma$-unstable rotor) symmetries of the Interacting Boson Model. At first, a Hamiltonian with only one- and two-body terms has been used. Excitation energies and $B$(E2) ratios of gamma transitions have been calculated. A satisfactory agreement has been obtained, with the exception of the odd-even staggering in the quasi-$\\gamma$ bands of $^{110,112}$Ru. The observed pattern is rather similar to the one for a rigid triaxial rotor. A calculation based on a Hamiltonian with three-body terms was able to remove this discrepancy. The relation between the IBM and the triaxial rotor model was also examined.

I. Stefanescu; A. Gelberg; J. Jolie; P. Van Isacker; P. Von Brentano; Y. X. Luo; S. J. Zhu; J. O. Rasmussen; J. H. Hamilton; A. V. Ramayya; X. L. Che

2007-06-12T23:59:59.000Z

87

IBM-1 description of the fission products $^{108,110,112}$Ru  

E-Print Network (OSTI)

IBM-1} calculations for the fission products $^{108,110,112}$Ru have been carried out. The even-even isotopes of Ru can be described as transitional nuclei situated between the U(5) (spherical vibrator) and SO(6) ($\\gamma$-unstable rotor) symmetries of the Interacting Boson Model. At first, a Hamiltonian with only one- and two-body terms has been used. Excitation energies and $B$(E2) ratios of gamma transitions have been calculated. A satisfactory agreement has been obtained, with the exception of the odd-even staggering in the quasi-$\\gamma$ bands of $^{110,112}$Ru. The observed pattern is rather similar to the one for a rigid triaxial rotor. A calculation based on a Hamiltonian with three-body terms was able to remove this discrepancy. The relation between the IBM and the triaxial rotor model was also examined.

Stefanescu, I; Jolie, J; Van Isacker, P; Von Brentano, P; Luo, Y X; Zhu, S J; Rasmussen, J O; Hamilton, J H; Ramayya, A V; Che, X L

2007-01-01T23:59:59.000Z

88

Role of hydrous ruthenium oxide in Pt-Ru direct methanol fuel cell anode electrocatalysts: The importance of mixed electron/proton conductivity  

Science Conference Proceedings (OSTI)

Pt-Ru is the favored anode catalyst for the oxidation of methanol in direct methanol fuel cells (DMFCs). The nanoscale Pt-Ru blacks are accepted to be bimetallic alloys as based on their X-ray diffraction patterns. These bulk and surface analyses show that although practical Pt-Ru blacks have diffraction patterns consistent with an alloy assignment, they are primarily a mix of Pt metal and Ru oxides plus some Pt oxides and only small amounts of Ru metal. Thermogravimetric analysis and X-ray photoelectron spectroscopy of as-received Pt-Ru electrocatalysts indicate that DMFC materials contain substantial amounts of hydrous ruthenium oxide (RuO{sub x}H{sub y}). A potential misidentification of nanoscale Pt-Ru blacks arises because RuO{sub x}H{sub y} is amorphous and cannot be discerned by X-ray diffraction. Hydrous ruthenium oxide is a mixed proton and electron conductor and innately expresses Ru-OH speciation. These properties are of key importance in the mechanism of methanol oxidation, in particular, Ru-OH is a critical component of the bifunctional mechanism proposed for direct methanol oxidation in that it is the oxygen-transfer species that oxidatively dissociates {single_bond}C{triple_bond}O fragments from the Pt surface. The catalysts and membrane-electrode assemblies of DMFCs should not be processed at or exposed to temperatures >150 C, as such conditions deleteriously lower the proton conductivity of hydrous ruthenium oxide and thus affect the ability of the Ru component of the electrocatalyst to dissociate water. With this analytical understanding of the true nature of practical nanoscale Pt-Ru electrocatalysts, the authors can now recommend that hydrous ruthenium oxide, rather than Ru metal or anhydrous RuO{sub 2}, is the preferred Ru speciation in these catalysts.

Rolison, D.R.; Hagans, P.L.; Swider, K.E.; Long, J.W. [Naval Research Lab., Washington, DC (United States). Surface Chemistry Branch

1999-02-02T23:59:59.000Z

89

Voltammetric characterization of ruthenium oxide-based aerogels and other RuO{sub 2} solids: The nature of capacitance in nanostructured materials  

Science Conference Proceedings (OSTI)

Ruthenium dioxide is an important electrode material for applications in electrocatalysis and power sources. High surface areas are achieved in hydrous RuO{sub 2} precipitates and in mixed ruthenium oxide-titanium oxide, (Ru-Ti)O{sub x}, aerogels ( in which nanoscale domains are networked to form a highly porous structure). The electrochemical properties of (Ru-Ti)O{sub x} aerogels, RuO{sub 2}, and hydrous RuO{sub 2} are examined by direct pressing of sub-milligram quantities of the solid onto the surface of a conductive carbon/wax composite. Voltammetric measurements in acidic electrolyte confirm a pseudocapacitive response for all the RuO{sub x}-based materials. Despite an improvement in BET surface area, as compared with other RuO{sub 2} materials, the (Ru-Ti)O{sub x} aerogel displays a low specific capacitance, which correlated to the high degree of crystallinity of the aerogel. Nanocrystallites of rutile RuO{sub 2}, formed during thermal treatment of the sol-gel Ru/Ti precursors, deleteriously affect the specific capacitance of the material; however, all RuO{sub x} domains in the aerogel are voltammetrically addressable. The influence of proton-donating species on the observed capacitance for the (Ru-Ti)O{sub x} aerogel is evident from the dependence of the voltammetric charge in acidic electrolyte on the potential scan rate.

Long, J.W.; Swider, K.E.; Merzbacher, C.I.; Rolison, D.R. [Naval Research Lab., Washington, DC (United States)

1999-02-02T23:59:59.000Z

90

Special Chemical Properties of RuOx Nanowires in RuOx/TiO2(110): Dissociation of Water and Hydrogen Production  

Science Conference Proceedings (OSTI)

Recently, there has been a strong interest in understanding the role of mixed-metal oxides in catalysts used for the production of hydrogen through the splitting of water. Here, we investigate the structural and chemical properties of RuO{sub x}/TiO{sub 2}(110) surfaces employing scanning tunneling microscopy, photoemission, and density functional calculations. Ruthenium oxide forms unique wirelike structures on top of TiO{sub 2}(110) which are very reactive toward water dissociation, being able to cleave O-H bonds at a temperature as low as 200 K. The calculated barrier for the dissociation of water on RuO{sub 2} nanowires is benchmarks for studying this reaction.

Rodriguez J. A.; Kundu, S.; Vidal, A.B.; Yang, F.; Ramírez, P.J.; Senanayake, S.D.; Stacchiola, D.; Evans, J.; Liu, P.

2012-02-23T23:59:59.000Z

91

NiW and NiRu Bimetallic Catalysts for Ethylene Steam Reforming: Alternative Mechanisms for Sulfur Resistance  

SciTech Connect

Previous investigations of Ni-based catalysts for the steam reforming of hydrocarbons have indicated that the addition of a second metal can reduce the effects of sulfur poisoning. Two systems that have previously shown promise for such applications, NiW and NiRu, are considered here for the steam reforming of ethylene, a key component of biomass derived tars. Monometallic and bimetallic Al{sub 2}O{sub 3}-supported Ni and W catalysts were employed for ethylene steam reforming in the presence and absence of sulfur. The NiW catalysts were less active than Ni in the absence of sulfur, but were more active in the presence of 50 ppm H{sub 2}S. The mechanism for the W-induced improvements in sulfur resistance appears to be different from that for Ru in NiRu. To probe reasons for the sulfur resistance of NiRu, the adsorption of S and C{sub 2}H{sub 4} on several bimetallic NiRu alloy surfaces ranging from 11 to 33 % Ru was studied using density functional theory (DFT). The DFT studies reveal that sulfur adsorption is generally favored on hollow sites containing Ru. Ethylene preferentially adsorbs atop the Ru atom in all the NiRu (111) alloys investigated. By comparing trends across the various bimetallic models considered, sulfur adsorption was observed to be correlated with the density of occupied states near the Fermi level while C{sub 2}H{sub 4} adsorption was correlated with the number of unoccupied states in the d-band. The diverging mechanisms for S and C{sub 2}H{sub 4} adsorption allow for bimetallic surfaces such as NiRu that enhance ethylene binding without accompanying increases in sulfur binding energy. In contrast, bimetallics such as NiSn and NiW appear to decrease the affinity of the surface for both the reagent and the poison.

Rangan, M.; Yung, M. M.; Medlin, J. W.

2012-06-01T23:59:59.000Z

92

Special Chemical Properties of RuOx Nanowires in RuOx/TiO2(110): Dissociation of Water and Hydrogen Production  

DOE Green Energy (OSTI)

Recently, there has been a strong interest in understanding the role of mixed-metal oxides in catalysts used for the production of hydrogen through the splitting of water. Here, we investigate the structural and chemical properties of RuO{sub x}/TiO{sub 2}(110) surfaces employing scanning tunneling microscopy, photoemission, and density functional calculations. Ruthenium oxide forms unique wirelike structures on top of TiO{sub 2}(110) which are very reactive toward water dissociation, being able to cleave O-H bonds at a temperature as low as 200 K. The calculated barrier for the dissociation of water on RuO{sub 2} nanowires is <0.05 eV. The presence of easily formable O vacancies in the ruthenium oxide nanowires facilitates the dissociation of water. Furthermore, RuO{sub x}/TiO{sub 2} (110) surfaces are able to catalyze the production of hydrogen through the water-gas shift reaction (H{sub 2}O + CO {yields} H{sub 2} + CO{sub 2}), exhibiting an activity that compares well with the activity found for extended surfaces of copper typically used as benchmarks for studying this reaction.

Rodriguez J. A.; Kundu, S.; Vidal, A.B.; Yang, F.; Ramírez, P.J.; Senanayake, S.D.; Stacchiola, D.; Evans, J.; Liu, P.

2012-02-23T23:59:59.000Z

93

MgO-Supported Cluster Catalysts with Pt-Ru Interactions Prepared from Pt3Ru6(CO)21(u3-H)(u-H)3  

Science Conference Proceedings (OSTI)

Bimetallic MgO-supported catalysts were prepared by adsorption of Pt{sub 3}Ru{sub 6}(CO){sub 21}({mu}{sub 3}-H)({mu}-H){sub 3} on porous MgO. Characterization of the supported clusters by infrared (IR) spectroscopy showed that the adsorbed species were still in the form of metal carbonyls. The supported clusters were decarbonylated by treatment in flowing helium at 300 C, as shown by IR and extended X-ray absorption fine structure (EXAFS) data, and the resulting supported PtRu clusters were shown by EXAFS spectroscopy to have metal frames that retained Pt-Ru bonds but were slightly restructured relative to those of the precursor; the average cluster size was almost unchanged as a result of the decarbonylation. These are among the smallest reported bimetallic clusters of group-8 metals. The decarbonylated sample catalyzed ethylene hydrogenation with an activity similar to that reported previously for {gamma}-Al{sub 2}O{sub 3}-supported clusters prepared in nearly the same way and having nearly the same structure. Both samples were also active for n-butane hydrogenolysis, with the MgO-supported catalyst being more active than the {gamma}-Al{sub 2}O{sub 3}-supported catalyst.

Chotisuwan,S.; Wittapyakun, J.; Lobo-Lapidus, R.; Gates, B.

2007-01-01T23:59:59.000Z

94

Chains of centered metal clusters with a novel range of distortions: Pr[sub 3]I[sub 3]Ru, Y[sub 3]I[sub 3]Ru, and Y[sub 3]I[sub 3]Ir  

SciTech Connect

The phases R[sub 3]I[sub 3]Ru (R = La, Pr, Gd, Y, Er) and R[sub 3]I[sub 3]Ir (R = Gd, Y) are obtained from the reactions of R, RI[sub 3], and Ru or Ir for 3-4 weeks in sealed Ta tubing at 850-975C, depending on the system. The title phases have been characterized by single-crystal X-ray means at room temperature. The first phase contains quasi-infinite double chains of edge-sharing Pr[sub 6](Ru) octahedra that are sheathed and interbridged by iodine. An evidently continuous distortion of these chains parallels the a/b axial ratio (in the order listed in the first sentence) such that metal octahedra are no longer obvious in Y[sub 3]I[sub 3]Ir; rather chains of trans-edge-sharing square pyramidal Y[sub 4]Ir units bonded base-to-base are more apt. Increased R-R, R-interstitial, and interstitial-interstitial bonding appears to parallel the degree of distortion. Magnetic data for La[sub 3]I[sub 3]Ru and Pr[sub 3]I[sub 3]Ru and the results of extended Hueckel band calculations on Pr[sub 3]I[sub 3]Ru are reported. Polar covalent Pr-Ru interactions and at least a quasi-closed shell configuration are emphasized by the latter.

Payne, M.W.; Dorhout, P.K.; Kim, Sungjin; Hughbanks, T.R.; Corbett, J.D. (Iowa State Univ., Ames (United States) Texas A and M Univ., College Station (United States))

1992-04-15T23:59:59.000Z

95

BIG RU N INDIANA LAKESHORE RUN E LUMBER CIT Y WARSAW JOHNST  

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

RU RU N INDIANA LAKESHORE RUN E LUMBER CIT Y WARSAW JOHNST OWN BU RNSIDE MILLSTONE FROSTBUR G JUN EAU PLU MVILLE CHERRY HILL KAN E BOSWELL MAR ION CENT ER CREEKSIDE SALTSBUR G POINT N BLAIR SVILL E COU NCIL RU N SIGEL LEWISVILLE BEAR C REEK AR MBRUST OHIOPYLE HALLT ON BR OOKVILLE MAR KTON NOL O RAT HMEL COR SICA MAR CHAND SMIC KSBU RG HOWE APOLLO SEVEN SPRIN GS YAT ESBORO MCNEES LUCIND A GEORGE PIN EY LEEPER TIMBLIN WILL ET FERGUSON CLIMAX PANIC DAVY HILL TIDIOUT E GRAMPIAN SLIGO ROC KVI LLE MAYFIELD VANDERGRIF T GIRT Y SAY NEW SALEM WET MOR E COWANSHAN NOC K ST ILLWAT ER ELD ERS RIDGE BLAIR CARROLLT OWN BU RNIN G WELL COOKPORT MCCREA FU RNACE RIDGWAY NEW ALEXANDR IA IRISH RU N WILC OX PLU M CREEK PADDYTOWN KEATING HOR TON GUF FEY WH ITESBURG BET ULA SMELTZ ER ODONN ELL DECAT UR W HAZELHU RST ST RONGSTOWN COL EGROVE SH EFFIELD WERT Z H OLLOW RED HILL ULYSSES PLATT SVIL LE BR ANCH W LATR OBE LEID Y TRIU

96

ANDREI MANOLESCU, ASSOCIATE PROFESSOR SCOOL OF SCIENCE AND ENGINEERING | RU LECTURE MARATHON  

E-Print Network (OSTI)

ANDREI MANOLESCU, ASSOCIATE PROFESSOR SCOOL OF SCIENCE AND ENGINEERING | RU LECTURE MARATHON: , Schrödinger equation: , ( ) , Hamiltonian (energy) operator: ( ) ( , ) 2 r t i r t H t r t t H t U r t m = = - + r r r h h r Example: The quantum well #12;Open quantum dots in contact with leads Unknown wave

Karlsson, Brynjar

97

Improvement security for RuBee radio-WiMAX mesh networks  

Science Conference Proceedings (OSTI)

Next generation communication standard integrate various access networks technology to become mesh networks. One of air interface standard is metropolitan area wireless broadband service. IEEE 802.16 is the basis for Worldwide Interoperability for Microwave ... Keywords: AAA, RuBee (IEEE 1902.1), WiMAX, gateway access point, group identity key

Tin-Yu Wu; Jhong-Ci Wu; Wei-Fang Weng

2008-09-01T23:59:59.000Z

98

The effect of Ru and Sn additions to Pt on the electrocatalysis of methanol oxidation: An in situ XAS investigation  

DOE Green Energy (OSTI)

Elements such as Ru and Sn used as ad-atoms or as alloying elements are known to enhance methanol oxidation reaction (MOR). Ru, both as alloying element as well as upd deposited on Pt/C is widely acknowledged for enhancing MOR. Sn on the other hand is more controversial, with evidence indicating enhancements for MOR when present as upd layer and marginally effective when present as an alloying element. In situ XAS is used to investigate some of these inconsistencies in the electrocatalysis of MOR. Results indicate that alloying Sn with Pt (Pt{sub 3}Sn primary phase) causes partial filling of the Pt 5 d-band vacancies and increase in the Pt-Pt bond distances which is directly opposite to a similar situation with Ru. Upd Sn however does not perturb Pt structurally or electronically. Ru and Sn (both as alloying element and as upd ad-layer) are associated with oxygenated species, the nature and strength of the Ru. and Sn - oxygen interactions are potential dependent. Hence alloying with Sn renders Pt surface unfavorable for methanol adsorption in contrast to alloying with Ru. Both Ru and Sn however promote MOR via their ability to nucleate oxygenated species on their surface at lower potentials as compared to pure Pt.

Mukerjee, S.; McBreen, J.

1997-07-01T23:59:59.000Z

99

Oblique-incidence sputtering of Ru intermediate layer for decoupling of intergranular exchange in perpendicular recording media  

SciTech Connect

During the Ru deposition process for granular type perpendicular magnetic recording media, both a reduction in the Ru intermediate layer thickness and lowering of sputtering gas pressure were successfully achieved by focusing on a self-shadowing effect. Oblique-incidence sputtering with a 60 deg. incident angle under an Ar gas pressure of 0.6 Pa yielded (1) columnar Ru grains with a growth direction of 30 deg. from the film normal, (2) c-plane sheet texture by epitaxial growth on the Pt underlayer, and (3) a flat envelope of the surface and a deep gap at grain boundaries. This change in the Ru structure significantly contributes to reducing exchange coupling among magnetic grains, especially in the initial growth region in an overlying granular medium.

Saito, Shin; Inoue, Ken [Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, 6-6-05, Aoba, Aramaki, Aoba-ku, Sendai 980-8579 Japan (Japan); Takahashi, Migaku [Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, 6-6-05, Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan); Center for Nanobioengineering and Spintronics, Chungnam National University, 220, Gung-Dong, Yuseong-Gu., Daejeon, 305-764 (Korea, Republic of)

2011-04-01T23:59:59.000Z

100

What Controls the Phase Diagram and Superconductivity in Ru-Substituted BaFe2As2?  

SciTech Connect

We use high resolution angle-resolved photoemission to study the electronic structure of the iron based high-temperature superconductors Ba(Fe{sub 1-x}Ru{sub x}){sub 2}As{sub 2} as a function of Ru concentration. We find that substitution of Ru for Fe is isoelectronic, i.e., it does not change the value of the chemical potential. More interestingly, there are no measured, significant changes in the shape of the Fermi surface or in the Fermi velocity over a wide range of substitution levels (0 < x < 0.55). Given that the suppression of the antiferromagnetic and structural phase is associated with the emergence of the superconducting state, Ru substitution must achieve this via a mechanism that does not involve changes of the Fermi surface. We speculate that this mechanism relies on magnetic dilution which leads to the reduction of the effective Stoner enhancement.

Dhaka, R. S.; Liu, Chang; Fernandes, R.M.; Jiang, Riu; Strehlow, C.P.; Kondo, Takeshi; Thaler, A.; Schmalian, Joerg; Bud-ko, S.J.; Canfield, P.C.; Kaminski, A.

2011-12-23T23:59:59.000Z

Note: This page contains sample records for the topic "hu ja ru" from the National Library of EnergyBeta (NLEBeta).
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101

Chemical Effect of Dry and Wet Cleaning of the Ru Protective Layer of the Extreme ultraviolet (EUV) Lithography Reflector  

E-Print Network (OSTI)

Park, Physical Chemistry Chemical Y.B. He, et al. , JournalChemical Effect of Dry and Wet Cleaning of the Ru ProtectiveBerkeley, California 94720 Chemical Sciences Division,

Belau, Leonid

2010-01-01T23:59:59.000Z

102

XPS and FTIR study of Ru/Al{sub 2}O{sub 3} and Ru/TiO{sub 2} catalysts: Reduction characteristics and interaction with a methane-oxygen mixture  

SciTech Connect

The oxidation state of alumina- and titania-supported Ru catalysts has been investigated as a function of reduction temperature, as well as by following the interaction with a methane-oxygen mixture at 773 and 973 K, employing XPS and FTIR techniques. It is found that the chemical behavior of Ru depends strongly on the material on which it is supported. Over Al{sub 2}O{sub 3}, ruthenium is incompletely reduced by treatment with hydrogen at 573 and 823 K, while oxidized Ru species are also detected following exposure of the catalyst to a methane-oxygen mixture at 773 and 973 K. In contrast, over TiO{sub 2}, ruthenium is more easily reduced and is stabilized in its reduced state following hydrogen treatment at 823 K. During treatment with the methane-oxygen mixture, no reoxidation of Ru occurs. The interaction between Ru and TiO{sub 2}, which inhibits the oxidation of ruthenium under conditions of partial oxidation of methane, is related to the unique ability of the Ru/TiO{sub 2} catalyst to promote the direct route of synthesis gas formation.

Elmasides, C.; Kondarides, D.I.; Verykios, X.E. [Univ. of Patras (Greece). Dept. of Chemical Engineering; Gruenert, W. [Ruhr-Universitaet Bochum (Germany). Lehrstuhl fuer Technische Chemie

1999-06-24T23:59:59.000Z

103

Low-energy structure of the even-A {sup 96-104}Ru isotopes via g-factor measurements  

SciTech Connect

The transient-field-perturbed angular correlation technique was used with Coulomb excitation in inverse kinematics to perform a systematic measurement of the g factors of the first excited 2{sub 1}{sup +} states in the stable even-A isotopes {sup 96-104}Ru. The measurements have been made relative to one another under matched kinematic conditions and include a measurement of g(2{sub 1}{sup +})=+0.47(3) in {sup 96}Ru.

Taylor, M. J.; Bentley, M. A. [Department of Physics, University of York, York YO10 5DD (United Kingdom); Guerdal, G.; Kumbartzki, G.; Benczer-Koller, N.; Sharon, Y. Y. [Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States); Stuchbery, A. E. [Department of Nuclear Physics, RSPE, Australian National University, Canberra, Australian Capital Territory 0200 (Australia); Berant, Z. [Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States); Nuclear Research Center Negev, Beer-Sheva 84190 (Israel); Casperson, R. J.; Casten, R. F.; Heinz, A.; Ilie, G.; McCutchan, E. A.; Qian, J.; Werner, V.; Williams, E.; Winkler, R. [Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States); Luettke, R. [Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States); Technical University Darmstadt, Darmstadt 64277 (Germany); Shoraka, B. [Department of Physics, University of Surrey, Guildford GU2 7XH (United Kingdom); Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States)

2011-04-15T23:59:59.000Z

104

Ru L[subscript 2,3] XANES theoretical simulation with DFT: A test of the core-hole treatment  

SciTech Connect

Density functional theory (DFT)-based relativistic calculations were performed to model the Ru L-edge X-ray absorption near edge structure (XANES) spectra of the hexaammineruthenium complex [Ru(NH{sub 3}){sub 6}]{sup 3+} and 'blue dimer' water oxidation catalyst, cis,cis- [(bpy){sub 2}(H{sub 2}O)Ru{sup III}ORu{sup III}(OH{sub 2})(bpy){sub 2}]{sup 4+} (bpy is 2,2-bipyridine). Two computational approaches were compared: simulations without the core-hole and by modeling of the core-hole within the Z+1 approximation. Good agreement between calculated and experimental XANES spectra is achieved without including the core-hole. Simulations with algorithms beyond the Z+1 approximation were only possible in a framework of the scalar relativistic treatment. Time-dependent DFT (TD-DFT) was used to compute the Ru L-edge spectrum for [Ru(NH{sub 3}){sub 6}]{sup 3+} model compound. Three different core-hole treatments were compared in a real-space full multiple scattering XANES modeling within the Green function formalism (implemented in the FEFF9.5 package) for the [Ru(Mebimpy)(bpm)(H{sub 2}O)]{sup 2+} complex. The latter approaches worked well in cases where spin-orbit treatment of relativistic effects is not required.

Alperovich, Igor; Moonshiram, Dooshaye; Soldatov, Alexander; Pushkar, Yulia (SFU-Russia); (Purdue)

2012-10-09T23:59:59.000Z

105

Assessing a Spectroelectrochemical Sensor's Performance for Detecting [Ru(bpy)3]2+ in Natural and Treated Water  

Science Conference Proceedings (OSTI)

A spectroelectrochemical sensor that combines three modes of selectivity in a single device was evaluated in natural and treated water samples using tris-(2,2’-bipyridyl) ruthenium(II) dichloride hexahydrate, [Ru(bpy)3]2+, as a model analyte. The sensor was an optically transparent indium tin oxide (ITO) electrode coated with a thin film of partially sulfonated polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SSEBS). As the potential of the ITO electrode was cycled from +0.7 to +1.3 V, the analyte changed from the colored [Ru(bpy)3]2+ complex to colorless [Ru(bpy)3]3+ complex and the change in absorbance at 450 nm was used as the optical signal for quantification. Calibration curves were obtained for [Ru(bpy)3]2+ in natural well water, river water and treated tap water with detection limits of 108, 139 and 264 nM, respectively. A standard addition method was developed to determine an *unknown* spike addition concentration of [Ru(bpy)3]2+ in well water. The spectroelectrochemical sensor determined the concentration of [Ru(bpy)3]2+ spiked into a sample of Hanford well water to be 0.39*0.03 mM versus the actual concentration of 0.40 mM.

Abu, Eme A.; Bryan, Samuel A.; Seliskar, Carl J.; Heineman, William R.

2012-07-01T23:59:59.000Z

106

Hydrogen adsorption on Ru(001) studied by Scanning TunnelingMicroscopy  

SciTech Connect

The adsorption of hydrogen on Ru(001) was studied by scanning tunneling microscopy at temperatures around 50 K. Hydrogen was found to adsorb dissociatively forming different ordered structures as a function of coverage. In order of increasing coverage {theta} in monolayers (ML) these were ({radical}3 x {radical}3)r30{sup o} at {theta} = 0.3 ML; (2 x 1) at {theta} = 0.50 ML, (2 x 2)-3H at {theta} = 0.75, and (1 x 1) at {theta} = 1.00. Some of these structures were observed to coexist at intermediate coverage values. Close to saturation of 1 ML, H-vacancies (unoccupied three fold fcc hollow Ru sites) were observed either as single entities or forming transient aggregations. These vacancies diffuse and aggregate to form active sites for the dissociative adsorption of hydrogen.

Tatarkhanov, Mous; Rose, Franck; Fomin, Evgeny; Ogletree, D.Frank; Salmeron, Miquel

2008-01-18T23:59:59.000Z

107

Upper limit on spontaneous supercurrents in Sr2RuO4  

SciTech Connect

It is widely believed that the perovskite Sr{sub 2}RuO{sub 4} is an unconventional superconductor with broken time reversal symmetry. It has been predicted that superconductors with broken time reversal symmetry should have spontaneously generated supercurrents at edges and domain walls. We have done careful imaging of the magnetic fields above Sr{sub 2}RuO{sub 4} single crystals using scanning Hall bar and SQUID microscopies, and see no evidence for such spontaneously generated supercurrents. We use the results from our magnetic imaging to place upper limits on the spontaneously generated supercurrents at edges and domain walls as a function of domain size. For a single domain, this upper limit is below the predicted signal by two orders of magnitude. We speculate on the causes and implications of the lack of large spontaneous supercurrents in this very interesting superconducting system.

Chung, Suk Bum

2010-04-05T23:59:59.000Z

108

Volume Profile for Intramolecular ET in Ru-Modified Cytochrome c  

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

for for Intramolecular Electron-Transfer Reactions: Tetraammine-ruthenium(ligand) Complexes of Cytochrome c Ji Sun, Chang Su, Martin Meier, Stephan S. Isied, James F. Wishart, and Rudi van Eldik Inorg. Chem. 37, 6129-6135 (1998) [Find paper at ACS Publications] Abstract: The kinetics and thermodynamics of a series of reversible intramolecular electron-transfer reactions in systems of the type trans-(NH3)4(L)Ru(His33)-Cyt c(hh) and trans-(NH3)4(L)Ru(His39)-Cyt c(Ck), where L represents NH3, isonicotinamide, 4-ethylpyridine, 3,5-lutidine and pyridine, were studied as a function of pressure in order to construct the first complete volume profiles for such processes. The volume profiles demonstrate a significant partial molar volume increase associated with the

109

Methanol electro-oxidation on unsupported Pt-Ru alloys at different temperatures  

Science Conference Proceedings (OSTI)

A wide compositional range of unsupported platinum-ruthenium alloy catalysts were prepared by thermal decomposition of the chlorides and chloroacids. The electrocatalysts were characterized by cyclic voltammetry, X-ray diffraction, and energy-dispersive X-ray spectroscopy. The BET surface area of the electrocatalysts increases with increasing Ru content up to {approximately}70 atomic percent (a/o) and then reaches a plateau value. Electrodes fabricated from the electrocatalysts were also evaluated as anodes for methanol electro-oxidation in sulfuric acid over a range of temperatures. Unlike the situation for pure Pt, Ru is inactive for methanol electro-oxidation at 25 C but becomes active at higher temperatures. The peak current observed during an anodic potential scan gradually shifts to more cathodic potentials with increasing temperature. When a comparison is made on the basis of electrode geometric surface area, a {approximately}50 a/o ruthenium electrocatalyst provides the highest activity for methanol electro-oxidation at both 25 and 60C. The methanol electro-oxidation rate is 0.5 orders with respect to methanol concentration (between 0.1 and 2 M) for the Pt-Ru ({approximately}50:50) electrode.

Chu, D.; Gilman, S. [Army Research Lab., Fort Monmouth, NJ (United States). Physical Sciences Directorate

1996-05-01T23:59:59.000Z

110

Metal-and hydrogen-bonding competition during water absorption on Pd(111) and Ru(0001)  

SciTech Connect

The initial stages of water adsorption on the Pd(111) and Ru(0001) surfaces have been investigated experimentally by Scanning Tunneling Microscopy in the temperature range between 40 K and 130 K, and theoretically with Density Functional Theory (DFT) total energy calculations and STM image simulations. Below 125 K water dissociation does not occur at any appreciable rate and only molecular films are formed. Film growth starts by the formation of flat hexamer clusters where the molecules bind to the metal substrate through the O-lone pair while making H-bonds with neighboring molecules. As coverage increases, larger networks of linked hexagons are formed with a honeycomb structure, which requires a fraction of the water molecules to have their molecular plane perpendicular to the metal surface with reduced water-metal interaction. Energy minimization favors the growth of networks with limited width. As additional water molecules adsorb on the surface they attach to the periphery of existing islands, where they interact only weakly with the metal substrate. These molecules hop along the periphery of the clusters at intermediate temperatures. At higher temperatures they bind to the metal to continue the honeycomb growth. The water-Ru interaction is significantly stronger than the water-Pd interaction, which is consistent with the greater degree of hydrogen-bonded network formation and reduced water-metal bonding observed on Pd relative to Ru.

Tatarkhanov, Mouslim; Ogletree, D. Frank; Rose, Franck; Mitsui, Toshiyuki; Fomin, Evgeny; Rose, Mark; Cerda, Jorge I.; Salmeron, Miquel

2009-09-03T23:59:59.000Z

111

Water Induced Surface Reconstruction of the Oxygen (2x1) covered Ru(0001)  

DOE Green Energy (OSTI)

Low temperature scanning tunneling microscopy (STM) and density functional theory (DFT) were used to study the adsorption of water on a Ru(0001) surface covered with half monolayer of oxygen. The oxygen atoms occupy hcp sites in an ordered structure with (2x1) periodicity. DFT predicts that water is weakly bound to the unmodified surface, 86 meV compared to the ~;;200 meV water-water H-bond. Instead, we found that water adsorption causes a shift of half of the oxygen atoms from hcp sites to fcc sites, creating a honeycomb structure where water molecules bind strongly to the exposed Ru atoms. The energy cost of reconstructing the oxygen overlayer, around 230 meV per displaced oxygen atom, is more than compensated by the larger adsorption energy of water on the newly exposed Ru atoms. Water forms hydrogen bonds with the fcc O atoms in a (4x2) superstructure due to alternating orientations of the molecules. Heating to 185 K results in the complete desorption of the water layer, leaving behind the oxygen honeycomb structure, which is metastable relative to the original (2x1). This stable structure is not recovered until after heating to temperatures close to 260K.

Maier, Sabine; Cabrera-Sanfelix, Pepa; Stass, Ingeborg; Sanchez-Portal, Daniel; Arnau, Andres; Salmeron, Miquel

2010-08-06T23:59:59.000Z

112

Water adsorption on O(2x2)/Ru(0001) from STM experiments andfirst-principles calculations  

DOE Green Energy (OSTI)

We present a combined theoretical and experimental study of water adsorption on Ru(0001) pre-covered with 0.25 monolayers (ML) of oxygen forming a (2 x 2) structure. Several structures were analyzed by means of Density Functional Theory calculations for which STM simulations were performed and compared with experimental data. Up to 0.25 monolayers the molecules bind to the exposed Ru atoms of the 2 x 2 unit cell via the lone pair orbitals. The molecular plane is almost parallel to the surface with its H atoms pointing towards the chemisorbed O atoms of the 2 x 2 unit cell forming hydrogen bonds. The existence of these additional hydrogen bonds increases the adsorption energy of the water molecule to approximately 616 meV, which is {approx}220 meV more stable than on the clean Ru(0001) surface with a similar configuration. The binding energy shows only a weak dependence on water coverage, with a shallow minimum for a row structure at 0.125 ML. This is consistent with the STM experiments that show a tendency of the molecules to form linear rows at intermediate coverage. Our calculations also suggest the possible formation of water dimers near 0.25 ML.

Cabrera-Sanfelix, P.; Sanchez-Portal, D.; Mugarza, A.; Shimizu,T.K.; Salmeron, M.; Arnau, A.

2007-10-15T23:59:59.000Z

113

The nature and alternate rates of the ribulose 1,5-bisphosphate (RuBP) carboxylase/oxygenase (Rubisco) oxygenation intermediate  

SciTech Connect

Mutant ribulose 1,5-bisphosphate (RuBP) were employed to investigate the partitioning of carbon flow between photosynthesis or photorespiration. Previous functional and structural studies implicate active site Lys329 and Glu48 or R. rubrum RuBp in promoting addition of CO2 to the RuBP-enediol. Two novel O2-dependent side products generated by the K329A and E49Q mutants provided insight into RuBP oxygenase intermediate and roles of Lys329 and Glu48 in oxygenation.

Harpel, M.R.; Chen, Yuh-Ru; Hartman, F.C.

1995-12-31T23:59:59.000Z

114

STATISTICAL EVALUATION OF PROCESSING DATA FROM THE RH RU HG MATRIX STUDY  

DOE Green Energy (OSTI)

An evaluation of the statistical significance of Rh, Ru, and Hg on DWPF Sludge Receipt and Adjustment Tank (SRAT) cycle catalytic hydrogen generation and process chemistry was conducted by the Savannah River National Laboratory (SRNL) using a full-factorial experimental design. This test design can identify significant interactions between these three species in addition to individual effects. Statistical modeling of data from the Rh-Ru-Hg matrix study has been completed. Preliminary data and conclusions were given in an earlier report. This final report concludes the work on the Rh-Ru-Hg matrix study. Modeling results are summarized below. Rhodium was found to: Promote increased total hydrogen mass; Promote an increase in the maximum hydrogen generation rate; Promote an increase in the hydrogen generation rate shortly after acid addition; Shorten the elapsed time between acid addition and the maximum hydrogen generation rate; Increase formate loss; Inhibit NO{sub 2} and total NO{sub x} off-gas species formation; and Reduce nitrite-to-nitrate conversion. Ruthenium was found to: Promote increased total hydrogen mass; Promote an increase in the maximum hydrogen generation rate; Promote an increase in the hydrogen generation rate in the second half of the SRAT cycle; Promote an increase in total CO{sub 2} generated; Increase formate loss; Promote NO{sub 2} and total NO{sub x} off-gas species formation; and Reduce nitrite-to-nitrate conversion. Mercury was found to: Inhibit total hydrogen mass produced; Promote an increase in total CO{sub 2} generated; Promote NO{sub 2} off-gas species formation; and Inhibit total NO{sub x} off-gas species formation. Results confirmed qualitative observations that Rh was activating before Ru for hydrogen generation. An interaction between Rh and Ru was present in the model for the total hydrogen generated during the SRAT, perhaps because the total combined contributions from two separate episodes of hydrogen generation. The first episode was dominated by Rh and the second by Ru. Consequently, the linear statistical model was asked to explain more than one phenomenon and included more terms. Mercury did not significantly impact hydrogen generated by either Rh or Ru in models in this study (all tests had Hg {ge} 0.5 wt% in total solids), whereas tests in Sludge Batches 3 and 4 (SB3 and SB4) with and without Hg showed a very significant negative impact from adding Hg. The conclusion is that once a small quantity of Hg is present, the primary inhibiting effect of Hg is in place, and hydrogen generation is relatively insensitive to further increases in total Hg. Any secondary Hg effects were difficult to quantify and model. Mercury was found to be statistically significant, however, as an inhibiting factor for hydrogen generation when modeling was based on the logarithm of the hydrogen generation rate. Only limited statistical evidence was found for non-linearity and quadratic dependence of other SRAT process measures, such as formate loss or total NO{sub x} generation, on the three matrix variables. The interaction term for Ru with Hg, however, appeared in models for total CO{sub 2}, total NO{sub 2}, and total moles of nitrogen-derived off-gas species. A single interaction between Ru and Hg during nitrite destruction could explain all three of these effects in the observed responses. Catalytic decomposition of nitrite ion by formic acid produces CO{sub 2} plus either NO or N{sub 2}O. The vast majority of the NO produced is converted to NO{sub 2}, and NO{sub 2} is the major fraction of the total moles of nitrogen in the off-gas species. Future experimental work related to catalytic hydrogen generation control is expected with regard to minimizing formic acid use through alternative reductants as well as in pursuing mesoporous media for sequestering the catalytically active noble metals to inhibit catalytic hydrogen generation. Two alternative stoichiometric acid equations are also under development. A summary document is in draft form that provides an overview of progress made in understanding ca

Koopman, D

2009-04-17T23:59:59.000Z

115

Structure and Reactions of Carbon and Hydrogen on Ru(0001): A Scanning Tunneling Microscopy Study  

DOE Green Energy (OSTI)

The interaction between carbon and hydrogen atoms on a Ru(0001) surface was studied using scanning tunneling microscopy (STM), Density Functional Theory (DFT) and STM image calculations. Formation of CH species by reaction between adsorbed H and C was observed to occur readily at 100 K. When the coverage of H increased new complexes of the form CH+nH (n = 1, 2 and 3) were observed. These complexes, never observed before, might be precursors for further hydrogenation reactions. DFT analysis reveals that a considerable energy barrier exists for the CH+H {yields} CH{sub 2} reaction.

Shimizu, Tomoko K.; Mugarza, Aitor; Cerda, Jorge; Salmeron, Miquel

2008-09-09T23:59:59.000Z

116

Observation of ferromagnetic resonance in strontium ruthenate (SrRuO3)  

SciTech Connect

We report the observation of ferromagnetic resonance (FMR) in SrRuO3 using the time-resolved magnetooptical Kerr effect. The FMR oscillations in the time-domain appear in response to a sudden, optically induced change in the direction of easy-axis anistropy. The high FMR frequency, 250 GHz, and large Gilbert damping parameter, alpha ~;; 1, are consistent with strong spin-orbit coupling. We find that the parameters associated with the magnetization dynamics, including alpha, have a non-monotonic temperature dependence, suggestive of a link to the anomalous Hall effect.

Langner, Matthew C.; Kantner, Colleen L.S.; Chu, Y.H.; Martin, Lane M.; Yu, Pu; Ramesh, R.; Orenstein, Joe

2008-12-03T23:59:59.000Z

117

Characterization and electrocatalytic properties of titanium-based Ru0.3Co0.7-xCex mixed oxide electrodes for oxygen evolution in alkaline solution  

Science Conference Proceedings (OSTI)

Ti-supported RuO2-Co3O4-CeO2 (Ru0.3Co0.7-xCex oxide, 0 ? x ? 0.7) electrodes were prepared by sol-gel process. The phase structure, surface ...

Hongjun Wu; Qin Ruan; Li Li; Baohui Wang

2011-01-01T23:59:59.000Z

118

The structure of mixed H2O-OH monolayer films on Ru(0001)  

Science Conference Proceedings (OSTI)

Scanning tunneling microscopy (STM) and x-ray absorption spectroscopy (XAS) have been used to study the structures produced by water on Ru(0001) at temperatures above 140 K. It was found that while undissociated water layers are metastable below 140 K, heating above this temperature produces drastic transformations whereby a fraction of the water molecules partially dissociate and form mixed H{sub 2}O-OH structures. XPS and XAS revealed the presence of hydroxyl groups with their O-H bond essentially parallel to the surface. STM images show that the mixed H{sub 2}O-OH structures consist of long narrow stripes aligned with the three crystallographic directions perpendicular to the close-packed atomic rows of the Ru(0001) substrate. The internal structure of the stripes is a honeycomb network of H-bonded water and hydroxyl species. We found that the metastable low temperature molecular phase can also be converted to a mixed H{sub 2}O-OH phase through excitation by the tunneling electrons when their energy is 0.5 eV or higher above the Fermi level. Structural models based on the STM images were used for Density Functional Theory optimizations of the stripe geometry. The optimized geometry was then utilized to calculate STM images for comparison with the experiment.

Tatarkhanov, M.; Fomin, E.; Salmeron, M.; Andersson, K.; Ogasawara, H.; Pettersson, L.G.M.; Nilsson, A.; Cerda, J.I.

2008-10-20T23:59:59.000Z

119

The Structure of Mixed H(2)O-OH Monolayer Films on Ru (0001)  

Science Conference Proceedings (OSTI)

Scanning tunneling microscopy (STM) and x-ray absorption spectroscopy (XAS) have been used to study the structures produced by water on Ru(0001) at temperatures above 140 K. It was found that while undissociated water layers are metastable below 140 K, heating above this temperature produces drastic transformations, whereby a fraction of the water molecules partially dissociate and form mixed H{sub 2}O-OH structures. X-ray photoelectron spectroscopy and XAS revealed the presence of hydroxyl groups with their O-H bond essentially parallel to the surface. STM images show that the mixed H{sub 2}O-OH structures consist of long narrow stripes aligned with the three crystallographic directions perpendicular to the close-packed atomic rows of the Ru(0001) substrate. The internal structure of the stripes is a honeycomb network of H-bonded water and hydroxyl species. We found that the metastable low temperature molecular phase can also be converted to a mixed H{sub 2}O-OH phase through excitation by the tunneling electrons when their energy is 0.5 eV or higher above the Fermi level. Structural models based on the STM images were used for density functional theory optimizations of the stripe geometry. The optimized geometry was then utilized to calculate STM images for comparison with the experiment.

Tatarkhanov, M.; Fomin, E.; Salmeron, M.; Andersson, K.; Ogasawara, H.; Pettersson, L.G.M.; Nilsson, A.; Cerda, J.I.

2009-05-26T23:59:59.000Z

120

Dependence of Electronic Structure of SrRuO3 and the Degree of Correlation on Cation Off-Stoichiometry  

Science Conference Proceedings (OSTI)

We have grown and studied high quality SrRuO{sub 3} films grown by MBE as well as PLD. By changing the oxygen activity during deposition we were able to make SrRuO{sub 3} samples that were stoichiometric (low oxygen activity) or with ruthenium vacancies (high oxygen activity). Samples with strontium vacancies were found impossible to produce since the ruthenium would precipitate out as RuO{sub 2}. The volume of the unit cell of SrRuO{sub 3} becomes larger as more ruthenium vacancies are introduced. The residual resistivity ratio (RRR) and room temperature resistivity were found to systematically depend on the volume of the unit cell and therefore on the amount of ruthenium vacancies. The RRR varied from {approx}30 for stoichiometric samples to less than two for samples that were very ruthenium poor. The room temperature resistivity varied from 190 {micro}{Omega} cm for stoichoimetric samples to over 300 {micro}{Omega} cm for very ruthenium poor samples. UPS spectra show a shift of weight from the coherent peak to the incoherent peak around the Fermi level when samples have more ruthenium vacancies. Core level XPS spectra of the ruthenium 3d lines show a strong screened part in the case of stoichiometric samples. This screened part disappears when ruthenium vacancies are introduced. Both the UPS and the XPS results are consistent with the view that correlation increases as the amount of ruthenium vacancies increase.

Siemons, W.

2011-08-19T23:59:59.000Z

Note: This page contains sample records for the topic "hu ja ru" 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

Up-Hill ET in (NH3)5Ru(III)-Modified Ferrocytochrome c  

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

Up-Hill Electron Transfer in Pentaammineruthenium(III)-Modified Up-Hill Electron Transfer in Pentaammineruthenium(III)-Modified Ferrocytochrome c: Rates, Thermodynamics, and the Mediating Role of the Ruthenium Moiety Ji Sun, James F. Wishart, and Stephan S. Isied Inorg. Chem. 34, 3998-4000 (1995) Abstract: At moderate to high ionic strengths (>0.1 M), Co(oxalate)33- oxidizes native cytochrome c very slowly, however it undergoes a rapid reaction with pendant ruthenium complexes covalently attached to the surface of the protein. Under these conditions, the rate of the thermodynamically unfavorable (up-hill) FeII-to-RuIII electron transfer process in pentaammineruthenium-modified horse-heart cytochrome c can be revealed using sufficiently high Co(oxalate) 33- concentrations. Rate measurements performed over a wide range of CoIII concentrations confirm the proposed

122

Enhancement of magnetoresistance using CoFe/Ru/CoFe synthetic ferrimagnetic pinned layer in BiFeO{sub 3} based spin-valves  

SciTech Connect

SrTiO{sub 3} (100) sub/BiFeO{sub 3}/CoFe/Ru/CoFe/Cu/CoFe/Ta structure was prepared by a combination of chemical solution deposition and sputtering method, and followed by a systematical investigation for the structural, magnetic and magnetoresistance properties at room temperature (RT) as a function of CoFe and Ru thicknesses. It was revealed that introduction of synthetic CoFe/Ru/CoFe as a pinning layer increased the giant magentoresistance (MR) ratio to 8.3% at RT. This enhancement of MR ratio might be attributed to (i) the increase of pinning field, and (ii) suppression of the influence of the surface roughness of BiFeO{sub 3} by inserting the synthetic CoFe/Ru/CoFe layer.

Naganuma, Hiroshi; Kubota, Miho; Inami, Nobuhito; Kawada, Yuki; Oogane, Mikihiko; Ando, Yasuo [Department of Applied Physics, Graduate School of Engineering, Tohoku University, 6-6-05 Aoba Aramaki Aoba-ku, Sendai 980-8579 (Japan); Bae, In-Tae [Small Scale Systems Integration and Packaging Center, State University of New York at Binghamton, Binghamton, New York 13902 (United States); Miyazaki, Takamichi [Tohoku University, Department of Instrumental Analysis, 6-6-11 Aoba, Aramaki, Aoba, Sendai 980-8579 (Japan); Mizukami, Shigemi [WPI Advanced Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577 (Japan); Han, X. F. [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

2012-08-13T23:59:59.000Z

123

Pt3Ru6 Clusters Supported on gamma-Al2O3: Synthesis from Pt3Ru6(Cu)21(u3-H)(u-H)3, Structural Characterization, and Catalysis of Ethylene Hydrogenation and n-Butane Hydrogenolysis  

SciTech Connect

The supported clusters Pt-Ru/{gamma}-Al{sub 2}O{sub 3} were prepared by adsorption of the bimetallic precursor Pt{sub 3}Ru{sub 6}(Cu){sub 21}({mu}{sub 3}-H)({mu}-H){sub 3} from CH{sub 2}Cl{sub 2} solution onto {gamma}-Al{sub 2}O{sub 3} followed by decarbonylation in He at 300 C. The resultant supported clusters were characterized by infrared (IR) and extended X-ray absorption fine structure (EXAFS) spectroscopies and as catalysts for ethylene hydrogenation and n-butane hydrogenolysis. After adsorption, the {nu}{sub CO} peaks characterizing the precursor shifted to lower wavenumbers, and some of the hydroxyl bands of the support disappeared or changed, indicating that the CO ligands of the precursor interacted with support hydroxyl groups. The EXAFS results show that the metal core of the precursor remained essentially unchanged upon adsorption, but there were distortions of the metal core indicated by changes in the metal-metal distances. After decarbonylation of the supported clusters, the EXAFS data indicated that Pt and Ru atoms interacted with support oxygen atoms and that about half of the Pt-Ru bonds were maintained, with the composition of the metal frame remaining almost unchanged. The decarbonylated supported bimetallic clusters reported here are the first having essentially the same metal core composition as that of a precursor metal carbonyl, and they appear to be the best-defined supported bimetallic clusters. The material was found to be an active catalyst for ethylene hydrogenation and n-butane hydrogenolysis under conditions mild enough to prevent substantial cluster disruption.

Chotisuwan,S.; Wittayakun, J.; Gates, B.

2006-01-01T23:59:59.000Z

124

Photophysical Studies of Ru(II)tris(2,2;#8242;-bipyridine) Confined within a Zn(II)?Trimesic Acid Polyhedral Metal?Organic Framework  

Science Conference Proceedings (OSTI)

The ability to confine photoactive catalysts within metal-organic framework (MOF) materials affords the opportunity to expand the functional diversity of these materials into solar based applications. Here, the confinement of Ru(II)tris(2,2'-bipyridine) (RuBpy) by a MOF material derived from Zn(II) ions and trimesic acid (hereafter, USF2) is examined. Although the encapsulated RuBpy could not be crystallographically resolved within the MOF framework, the photophysical properties of the complex are characteristic of confinement including extended triplet metal-to-ligand ({sup 3}MLCT) lifetime ({tau}{sub ethanol} = 614 ns and {tau}{sub USF2} = 1.2 {micro}s at 25 C) and a slight hypsochromic shift in the steady-state emission spectrum relative to RuBpy in ethanol. The extended lifetime is attributed to a deactivation of a nonradiative {sup 3}dd that is antibonding with respect to the Ru(II)-bipyridine due to a confined molecular environment. These results represent one of the first examples of RuBpy encapsulation and photophysical characterization within a polyhedral MOF material.

Larsen, Randy W.; Wojtas, Lukasz (USF)

2012-10-25T23:59:59.000Z

125

Project RU LlSON COPY ON-SITE RADIOLOGICAL PROGRAMS DURING REENTRY DISILLING THROUGH PRODUCTION TESTING  

Office of Legacy Management (LM)

RU LlSON RU LlSON COPY ON-SITE RADIOLOGICAL PROGRAMS DURING REENTRY DISILLING THROUGH PRODUCTION TESTING FINAL REPOAT EBERLlNE INSTRUMENT CORPORATION Santa Fe, New Mexico Date Published - December 1973 PREPARED FOR THE U. S. ATOMIC ENERGY COMMISSION N E V A D A OPERATIONS OFFICE UNDER CONTRACT NO. AT(26-11-294 DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. Project RULISON ON-S1l'E RADIOLOGICAL PROGRAMS D U R I N G R E E N T R Y D R I L L I N G THROUGH PRODUCTION TESTING \ F I N A L REPORT EBERLINE INSTRUMENT CORPORATION . Santa Fe, New Mexico 1 Date Published - December 1973 NEVADA OPERATIONS OFFICE . UNDER CONTRACT NO. AT(26-11-294 NOTICE ~~~~ This report was prepared as an account of work sponsored by the United

126

Suhr 7900.955 L*E+ru Pkzza. S. Iv.. Washington, D.C. 20024-i  

Office of Legacy Management (LM)

Suhr 7900.955 L*E+ru Pkzza. S. Iv.. Washington, D.C. 20024-i Suhr 7900.955 L*E+ru Pkzza. S. Iv.. Washington, D.C. 20024-i 7117~03.8J.cdy.4 23 September 19E M r. Andrew Wallo, III, NE-23 Division of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 Dear M r. Wallo: ELIMINATION RECOMMENDATION -- COLLEGES AND UN11 The attached elimination recommendation was prepar with your suggestion during our meeting on 22 September includes 26 colleges and universities identified.in Enc Aerospace letter subject: Status of Actions - F&RAP ! 27 May 1987; three institutions (Tufts College, Univerr and the University of Washington) currently identified list of sites under consideration; and six institution: tified during a search of Hanford records. The attached was prepared to document the eliminai

127

Effect of crystallinity and nonstoichiometric region on dielectric properties of SrTiO{sub 3} films formed on Ru  

Science Conference Proceedings (OSTI)

The dielectric constant depending on the film thickness for SrTiO{sub 3} films formed on Ru was investigated after an annealing step at 600 deg. C, which shows that the dielectric constant increased abruptly with the film thickness up to 20 nm and then increased slightly, remaining relatively constant at a value of about 65. The abrupt increase was due to the crystallinity of SrTiO{sub 3} films. On the other hand, the slight increase was related to the existence of nonstoichiometric region near the interface of SrTiO{sub 3} film and Ru, which was intermixed with SrTiO{sub 3} and Ti-O phases having an equivalent oxide thickness over 0.32 nm.

Kim, Ja-Yong; Ahn, Ji-Hoon; Kang, Sang-Won; Kim, Jin-Hyock; Roh, Jae-Sung [Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea, Republic of); Hynix Semiconductor Incorporated, San 136-1, Ami-ri, Bubal-eub, Icheon-si, Kyoungki-do 467-701 (Korea, Republic of)

2007-08-27T23:59:59.000Z

128

Electromagnetic properties of the first 2{sub 1}{sup +} excited states in {sup 100,102,104}Ru  

Science Conference Proceedings (OSTI)

Measurements of Coulomb excitation probabilities of the first 2{sub 1}{sup +} state of {sup 100,102,104}Ru were carried out using back-scattered ions of {sup 4}He and {sup 16}O. The static quadrupole moments Q{sub 2{sub 1}{sup +}} and the reduced transition probabilities B(E2;0{sub 1}{sup +}{r_arrow}2{sub 1}{sup +}) have been determined using the reorientation effect. The quadrupole moments Q{sub 2{sub 1}{sup +}} deduced for the positive sign of the 2{sub 2}{sup +} interference term are {minus}0.54{plus_minus}0.07 eb, {minus}0.64{plus_minus}0.05 eb, {minus}0.62{plus_minus}0.08 eb for {sup 100}Ru, {sup 102}Ru, and {sup 104}Ru, respectively. The reduced transition probabilities B(E2;0{sub 1}{sup +}{r_arrow}2{sub 1}{sup +}) are 0.493{plus_minus}0.003 e{sup 2}b{sup 2}, 0.614{plus_minus}0.004 e{sup 2}b{sup 2}, and 0.809{plus_minus}0.006 e{sup 2}b{sup 2}, respectively. A compilation of the available experimental results for the reduced eletric quadrupole transition probability B(E2;0{sub 1}{sup +}{r_arrow}2{sub 1}{sup +}) and for the static quadrupole moments Q{sub 2{sub 1}{sup +}} for the even ruthenium stable isotopes (96{le}A{le}104) are presented. {copyright} {ital 1998} {ital The American Physical Society}

Hirata, J.H.; Salem-Vasconcelos, S.; Bechara, M.J.; Gomes, L.C.; Dietzsch, O. [Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, Sao Paulo, SP 05315-970 (Brazil)] [Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, Sao Paulo, SP 05315-970 (Brazil)

1998-01-01T23:59:59.000Z

129

Effective thermal boundary resistance from thermal decoupling of magnons and phonons in SrRuO3 thin films  

SciTech Connect

We use the time-resolved magneto-optical Kerr effect (TRMOKE) to measure the local temperature and heat flow dynamics in ferromagnetic SrRuO3 thin films. After heating by a pump pulse, the film temperature decays exponentially, indicating that the heat flow out of the film is limited by the film/substrate interface. We show that this behavior is consistent with an effective boundary resistance resulting from disequilibrium between the spin and phonon temperatures in the film.

Langner, M.C.; Kantner, C.L.S.; Chu, Y.H.; Martin, L.M.; Yu, P.; Ramesh, R.; Orenstein, J.

2010-01-20T23:59:59.000Z

130

Ausgabe 3 2007/2008 Jahrgang 52 6. Dezember 2007www.hu-berlin.de/pr/zeitung HUMBOLDTD i e Z e i t u n g d e r A l m a M a t e r B e r o l i n e n s i s  

E-Print Network (OSTI)

- kollegien sind auch elf Wissenschaftler der HU: Prof. Dr. Ernst Osterkamp, Neu- ere deutsche Literatur; Prof. Elmar Kulke, Humangeographie. Red. Alexander-von-Humboldt- Stipendiat in der Chemie Seit dem 1. Februar 2008 forscht Dr. Fawzi Mohamed am Institut für Chemie, Arbeitsgruppe Theoretische Chemie und

Röder, Beate

131

Zn-Doped RuO2 Electrocatalyts for Selective Oxygen Evolution: Relationship Between Local Structure and Electrocatalytic Behavior in Chloride Containing Media  

SciTech Connect

Nanocrystalline electrocatalytically active materials of chemical composition Ru{sub 1-x}Zn{sub x}O{sub 2} (0 < x < 0.3) were synthesized by freeze-drying technique. The diffraction patterns of the prepared samples corresponded to single-phase rutile type oxides.Local structure of the Ru{sub 1-x}Zn{sub x}O{sub 2} based on refinement of Ru K and Zn K edge EXAFS functions shows clustering of the Zn ions in the blocks with ilmenite structure intergrowing with Ru-rich rutile blocks. Ru{sub 1-x}Zn{sub x}O{sub 2} oxides are selective catalysts for anodic oxygen evolution. The selectivity toward oxygen evolution in the presence of chlorides is affected by the actual Zn content and can be ascribed to structural hindrance of the formation of the surface peroxo group based active sites for chlorine evolution. The selectivity toward oxygen evolution in presence of chlorides is accompanied by the drop of the total activity, which gets more pronounced with increasing Zn content.

V Petrykin; K Macounova; J Franc; O Shlyakhtin; M Klementova; S Mukerjee; p Krtil

2011-12-31T23:59:59.000Z

132

Isotopic tracer studies of Fischer-Tropsch Synthesis over Ru/TiO sub 2 catalysts  

DOE Green Energy (OSTI)

Fischer-Tropsch synthesis is a process in which CO and H{sub 2} react to give predominantly liquid hydrocarbons. The reaction can be considered a special type of polymerization in which the monomer is produced in situ, and chain growth occurs by a sequence of independently repeated additions of the monomer to the growing chain. A investigation has been conducted to study the CO hydrogenation reaction in order to better understand catalyst deactivation and the elementary surface processes involved in chain growth. Isotopic tracers are used in conjunction with transient-response techniques in this study of Fischer-Tropsch synthesis over Ru/TiO{sub 2} catalysts. Experiments are conducted at a total pressure of 1 atmosphere, reaction temperatures of 453--498 K and D{sub 2}/CO (or H{sub 2}/CO) ratios of 2--5. Synthesis products are analyzed by gas chromatography or isotope-ratio gas chromatography-mass spectrometry. Rate constants for chain initiation, propagation and termination are evaluated under steady-state reaction conditions by using transients in isotopic composition. The activation energy for chain termination is much higher than that for propagation, accounting for the observed decrease in the chain growth parameter are also estimated. Coverages by reaction intermediates are also estimated. When small amounts of {sup 12}C-labelled ethylene are added to {sup 13}CO/H{sub 2} synthesis gas, ethylene acts as the sole chain initiator. Ethylene-derived carbon also accounts for 45% of the C{sub 1} monomer pool. 102 refs., 29 figs., 11 tabs.

Krishna, K.R.

1992-01-01T23:59:59.000Z

133

Isotopic tracer studies of Fischer-Tropsch Synthesis over Ru/TiO{sub 2} catalysts  

DOE Green Energy (OSTI)

Fischer-Tropsch synthesis is a process in which CO and H{sub 2} react to give predominantly liquid hydrocarbons. The reaction can be considered a special type of polymerization in which the monomer is produced in situ, and chain growth occurs by a sequence of independently repeated additions of the monomer to the growing chain. A investigation has been conducted to study the CO hydrogenation reaction in order to better understand catalyst deactivation and the elementary surface processes involved in chain growth. Isotopic tracers are used in conjunction with transient-response techniques in this study of Fischer-Tropsch synthesis over Ru/TiO{sub 2} catalysts. Experiments are conducted at a total pressure of 1 atmosphere, reaction temperatures of 453--498 K and D{sub 2}/CO (or H{sub 2}/CO) ratios of 2--5. Synthesis products are analyzed by gas chromatography or isotope-ratio gas chromatography-mass spectrometry. Rate constants for chain initiation, propagation and termination are evaluated under steady-state reaction conditions by using transients in isotopic composition. The activation energy for chain termination is much higher than that for propagation, accounting for the observed decrease in the chain growth parameter are also estimated. Coverages by reaction intermediates are also estimated. When small amounts of {sup 12}C-labelled ethylene are added to {sup 13}CO/H{sub 2} synthesis gas, ethylene acts as the sole chain initiator. Ethylene-derived carbon also accounts for 45% of the C{sub 1} monomer pool. 102 refs., 29 figs., 11 tabs.

Krishna, K.R.

1992-01-01T23:59:59.000Z

134

Charge transport and magnetization profile at the interface between the correlated metal CaRuO{sub3} and the antiferromagnetic insulator CaMnO{sub3}.;  

Science Conference Proceedings (OSTI)

A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal CaRuO{sub 3} and the antiferromagnetic insulator CaMnO{sub 3}. The charge-carrier density and Ru valence state in the superlattices are not significantly different from those of bulk CaRuO{sub 3}. The small charge transfer across the interface implied by these observations confirms predictions derived from density-functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3-4 unit cells into CaMnO{sub 3}, far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.

Freeland, J. W.; Chakhalian, J.; Boris, A. V.; Tonnerre, J-M.; Kavich, JJ.; Yordanov, P.; Grenier,S.; Zschack, P.; Karapetrova, E.; Popovich, P.; Lee, H. N.; Keimer, B. (X-Ray Science Division); ( PSC-USR); (Univ. of Arkansas); (Max Planck Inst. for Solid State Research); (Loughborough Univ.); (CNRS and Univ. Joseph Fourier); (Univ. of Illinois); (ORNL)

2010-01-01T23:59:59.000Z

135

Preparation and electrical properties of xCaRuO{sub 3}/(1 - x)CaTiO{sub 3} perovskite composites  

SciTech Connect

CaRuO{sub 3}-CaTiO{sub 3} ceramic composites were prepared by sintering for short times for potential applications in the areas of electronic ceramics. Scanning electron microscopy and energy dispersive X-ray analysis showed two separate phases, CaRuO{sub 3} and CaTiO{sub 3} in the composite. Conductivity data, measured by the four-probe method, showed that the composites have high electrical conductivity when x {>=} 0.19 in xCaRuO{sub 3}-(1 - x)CaTiO{sub 3} composites. Furthermore, the nanoparticle of calcium ruthenate prepared by reverse micelle synthesis was used to be conductive agent for the composite. The result shows that the use of nano-sized calcium ruthenate enabled higher electrical conductivity to be maintained down to x = 0.09.

Jiao, Shuqiang, E-mail: sj332@cam.ac.uk [Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom); Kumar, Krishnankutty-Nair P.; Kilby, Kamal Tripuraneni [Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom); Fray, Derek J., E-mail: djf25@cam.ac.uk [Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom)

2009-08-05T23:59:59.000Z

136

On the differences in the reaction mechanism for CO and CO/H{sub 2} electrooxidation on PtRu and PtSn alloy electrodes  

DOE Green Energy (OSTI)

Electrooxidation kinetics of mixtures of carbon monoxide and hydrogen were studied on well-characterized surfaces of Pt and alloys of PtRu and PtSn in 0.5 M H{sub 2}SO{sub 4} at room temperature and 60 C. The alloy electrode surfaces were prepared in UHV by sputter/anneal cycles and their surface compositions were determined via low energy ion scattering. Subsequently, the electrodes were transferred contamination-free from UHV into a rotating disk electrode (RDE) configuration in a conventional electrochemical cell and their activity was measured both by CO stripping voltammetry and under the continuous flow of CO and CO/H{sub 2} gas mixtures in RDE-experiments. The overpotential for the continuous oxidation of pure CO on PtSn electrodes with a Sn surface composition of x{sub Sn,s} {approximately} 0.2 is significantly smaller than on PtRu alloys (x{sub Ru,s} {approximately} 0.5) and on pure Pt. The reaction order with respect to solution phase CO is negative on PtRu alloys due to the competition between OH{sub ads} nucleation and CO adsorption on Ru surface atoms. Owing to the lack of CO adsorption on OH{sub ads}-providing Sn surface atoms, the reaction order with respect to CO is positive on PtSn electrodes. Therefore, the activity enhancement of PtSn electrodes versus PtRu and Pt electrodes is most pronounced in pure CO and decreases with the CO concentration in CO/N{sub 2} and CO/H{sub 2} mixtures.

Gasteiger, H.A. [Univ. Ulm (Germany). Abteilung Oberflaechenchemie und Katalyse; Markovic, N.M.; Ross, P.N. Jr. [Lawrence Berkeley National Lab., CA (United States)

1997-04-01T23:59:59.000Z

137

Interactions of hydrogen with alkali promoted Ru/SiO{sub 2} catalysts: A proton NMR study  

DOE Green Energy (OSTI)

Role of H spillover to the silica support was studied using chemisorption; a strongly bound component of spilled over H was found in the silica support which interfered with accurate measurements of active metal sites via volumetric strong H chemisorption. The volumetric chemisorption technique was modified so that measurement times were reduced from 12--36 h to 1 h. The active Ru surface was characterized means of changes in proton spin counts and NMR Knight shifts vs alkali loading. Na, K blocked the active surface of Ru metal, but Cs was pushed off by H chemisorption. The alkali promoters restricted H mobility on both metal surface and at the metal support interfaces; this is consistent with effects on Fischer-Tropsch synthesis. {sup 1}H NMR was used to study the effect of the active metal and promoter on support hydroxyl groups. The OH group density in the silica support decreased with metal and/or promoter loading, but not on a one-to-one basis; the exchange efficiency of the hydroxyls decreased with atomic size of the alkali metal. An additional downfield proton resonance was detected which was assigned to the alkali hydroxide species in the support.

Ozbay, U.D.

1994-05-10T23:59:59.000Z

138

Modulation of the Folding Energy Landscape of Cytochrome c with Salt Shi Zhong, Denis L. Rousseau,* and Syun-Ru Yeh*  

E-Print Network (OSTI)

,* and Syun-Ru Yeh* Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New chain is unfolded. The Met80 ligand can be replaced either by a solvent water molecule, leading to a water-His bound state (HW), or by His26/33, leading to a bis-His state (HH).1,2,4,7 Under acidic

Yeh, Syun-Ru

139

Giant magnetoresistive structures based on CrO{sub 2} with epitaxial RuO{sub 2} as the spacer layer  

Science Conference Proceedings (OSTI)

Epitaxial ruthenium dioxide (RuO{sub 2})/chromium dioxide(CrO{sub 2}) thin film heterostructures have been grown on (100)-TiO{sub 2} substrates by chemical vapor deposition. Both current-in-plane (CIP) and current-perpendicular-to-plane (CPP) giant magnetoresistive stacks were fabricated with either Co or another epitaxial CrO{sub 2} layer as the top electrode. The Cr{sub 2}O{sub 3} barrier, which forms naturally on CrO{sub 2} surfaces, is no longer present after the RuO{sub 2} deposition, resulting in a highly conductive interface that has a resistance at least four orders of magnitude lower. However, only very limited magnetoresistance (MR) was observed. Such low MR is due to the appearance of a chemically and magnetically disordered layer at the CrO{sub 2} and RuO{sub 2} interfaces when Cr{sub 2}O{sub 3} is transformed into rutile structures during its intermixing with RuO{sub 2}.

Miao, G.X.; Gupta, A.; Sims, H.; Butler, W.H.; Ghosh, S.; Xiao Gang [Physics Department, Brown University, Providence, Rhode Island 02912 (United States); Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487 (United States); Department of Electrical and Computer Engineering, University of Illinois, Chicago, Illinois 60607 (United States); Physics Department, Brown University, Providence, Rhode Island 02912 (United States)

2005-05-15T23:59:59.000Z

140

Excited State Dynamics of Two New Ru(II) Cyclometallated Dyes: Relation to Cells for Solar Energy Conversion and Comparison to  

E-Print Network (OSTI)

Excited State Dynamics of Two New Ru(II) Cyclometallated Dyes: Relation to Cells for Solar Energy, are reported. Related complexes have been used as efficient dyes in dye- sensitized solar cells (DSSCs of ruthenium dyes used in DSSCs to lower energies, it is evident from this work, that for cyclometallated phpy

Turro, Claudia

Note: This page contains sample records for the topic "hu ja ru" 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
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141

Determination of the spin-flip time in ferromagnetic SrRuO3 from time-resolved Kerr measurements  

SciTech Connect

We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO{sub 3}. We observe that the demagnetization time slows substantially at temperatures within 15K of the Curie temperature, which is {approx} 150K. We analyze the data with a phenomenological model that relates the demagnetization time to the spin flip time. In agreement with our observations the model yields a demagnetization time that is inversely proportional to T-T{sub c}. We also make a direct comparison of the spin flip rate and the Gilbert damping coefficient showing that their ratio very close to k{sub B}T{sub c}, indicating a common origin for these phenomena.

Kantner, C.L.S.; Langner, M.C.; Siemons, W.; Blok, J.L.; Koster, G.; Rijnders, A.J.H.M.; Ramesh, R.; Orenstein, J.

2010-07-30T23:59:59.000Z

142

Frustration by competing interactions in the highly-distorted double perovskites La2NaB'O6 (B' = Ru, Os)  

Science Conference Proceedings (OSTI)

The usual classical behaviour of S = 3/2, B-site ordered double perovskites generally results in simple, commensurate magnetic ground states. In contrast, heat capacity and neutron powder diffraction measurements for the S = 3/2 systems La2NaB'O6 (B = Ru, Os) reveal an incommensurate magnetic ground state for La2NaRuO6 and a drastically suppressed ordered moment for La2NaOsO6. This behaviour is attributed to the large monoclinic structural distortions of these double perovskites. The distortions have the effect of weakening the nearest neighbour superexchange interactions, presumably to an energy scale that is comparable to the next nearest neighbour superexchange. The exotic ground states in these materials can then arise from a competition between these two types of antiferromagnetic interactions, providing a novel mechanism for achieving frustration in the double perovskite family.

Aczel, Adam A [ORNL; Bugaris, Dan [University of South Carolina; Li, Ling [University of Tennessee, Knoxville (UTK); Yan, Jiaqiang [ORNL; Dela Cruz, Clarina R [ORNL; Zur Loye, Hans-Conrad [University of South Carolina; Nagler, Stephen E [ORNL

2013-01-01T23:59:59.000Z

143

{sup 45}Sc Solid State NMR studies of the silicides ScTSi (T=Co, Ni, Cu, Ru, Rh, Pd, Ir, Pt)  

SciTech Connect

The silicides ScTSi (T=Fe, Co, Ni, Cu, Ru, Rh, Pd, Ir, Pt) were synthesized by arc-melting and characterized by X-ray powder diffraction. The structures of ScCoSi, ScRuSi, ScPdSi, and ScIrSi were refined from single crystal diffractometer data. These silicides crystallize with the TiNiSi type, space group Pnma. No systematic influences of the {sup 45}Sc isotropic magnetic shift and nuclear electric quadrupolar coupling parameters on various structural distortion parameters calculated from the crystal structure data can be detected. {sup 45}Sc MAS-NMR data suggest systematic trends in the local electronic structure probed by the scandium atoms: both the electric field gradients and the isotropic magnetic shifts relative to a 0.2 M aqueous Sc(NO{sub 3}){sub 3} solution decrease with increasing valence electron concentration and within each T group the isotropic magnetic shift decreases monotonically with increasing atomic number. The {sup 45}Sc nuclear electric quadrupolar coupling constants are generally well reproduced by quantum mechanical electric field gradient calculations using the WIEN2k code. Highlights: Black-Right-Pointing-Pointer Arc-melting synthesis of silicides ScTSi. Black-Right-Pointing-Pointer Single crystal X-ray data of ScCoSi, ScRuSi, ScPdSi, and ScIrSi. Black-Right-Pointing-Pointer {sup 45}Sc solid state NMR of silicides ScTSi.

Harmening, Thomas [Institut fuer Anorganische und Analytische Chemie and NRW Graduate School of Chemistry, Universitaet Muenster, Corrensstrasse 30, D-48149 Muenster (Germany); Eckert, Hellmut, E-mail: eckerth@uni-muenster.de [Institut fuer Physikalische Chemie, Universitaet Muenster, Corrensstrasse 30, D-48149 Muenster (Germany); Fehse, Constanze M. [Institut fuer Physikalische Chemie, Universitaet Muenster, Corrensstrasse 30, D-48149 Muenster (Germany); Sebastian, C. Peter, E-mail: sebastiancp@jncasr.ac.in [New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064 (India); Poettgen, Rainer, E-mail: pottgen@uni-muenster.de [Institut fuer Anorganische und Analytische Chemie and NRW Graduate School of Chemistry, Universitaet Muenster, Corrensstrasse 30, D-48149 Muenster (Germany)

2011-12-15T23:59:59.000Z

144

Published: August 17, 2011 r 2011 American Chemical Society 15635 dx.doi.org/10.1021/ja205274g |J. Am. Chem. Soc. 2011, 133, 1563515643  

E-Print Network (OSTI)

. Chem. Soc. 2011, 133, 15635­15643 Journal of the American Chemical Society ARTICLE kinetic studies: N, 15635­15643 Journal of the American Chemical Society ARTICLE Partitioning Kinetic MeasurementsPublished: August 17, 2011 r 2011 American Chemical Society 15635 dx.doi.org/10.1021/ja205274g |J

Daniel, Susan

145

Adsorption and decomposition of Ru{sub 3}(CO){sub 9}(CH{sub 3}CN){sub 3} at platinum surfaces: An X-ray photoelectron spectroscopy and Fourier transform-infrared spectroscopy study  

Science Conference Proceedings (OSTI)

The direct methanol fuel cell (DMFC) is an attractive power source for mobile applications due to the high-energy density of methanol, the portability and ease of distribution of liquid rather than gaseous fuel, and elimination of the need for a bulky, power-consuming fuel reformer. There are several factors limiting the power output of polymer electrolyte DMFCs. One of the major factors is the slow kinetics of the methanol electrooxidation reaction on the conventional platinum catalyst material. A CH{sub 3}CN-modified triruthenium carbonyl cluster, Ru{sub 3}(CO){sub 9}(CH{sub 3}CN){sub 3}(I), has been adsorbed on platinum and platinum oxide surfaces from dichloromethane solutions. The modified surface has been characterized by X-ray photoelectron spectroscopy (XPS) and polarized grazing angle Fourier transform-infrared (FT-IR) microscopy. The proposed mechanism for the adsorption of I involves the chemisorption of the metal cluster at the platinum surface by losing the acetonitrile ligand. The original cluster, Ru{sub 3}(CO){sub 12}, could not be adsorbed under the same experimental conditions used for cluster I. The cluster-modified surface was treated with hydrogen for the reduction of the cluster to its metallic state on the Pt surface. This was done at different temperatures. The XPS results show the formation of a complex Ru-RuO{sub 2}-RuO{sub 3}/Pt surface.

Fachini, E.R.; Cabrera, C.R. [Univ. of Puerto Rico, San Juan (Puerto Rico). Dept. of Chemistry

1999-02-02T23:59:59.000Z

146

Crystal fields, disorder, and antiferromagnetic short-range order in (Yb0.24Sn0.76)Ru  

Science Conference Proceedings (OSTI)

We report extensive measurements on a new compound (Yb{sub 0.24}Sn{sub 0.76})Ru that crystallizes in the cubic CsCl structure. Valence-band photoemission (PES) and L{sub 3} x-ray absorption show no divalent component in the 4f configuration of Yb. Inelastic neutron scattering (INS) indicates that the eight-fold degenerate J-multiplet of Yb{sup 3+} is split by the crystalline electric field (CEF) into a {Lambda}{sub 7}-doublet ground state and a {Lambda}{sub 8} quartet at an excitation energy 20 meV. The magnetic susceptibility can be fit very well by this CEF scheme under the assumption that a {Lambda}{sub 6}-excited state resides at 32 meV; however, the {Lambda}{sub 8}/{Lambda}{sub 6} transition expected at 12 meV was not observed in the INS. The resistivity follows a Bloch-Grueneisen law shunted by a parallel resistor, as is typical of systems subject to phonon scattering with no apparent magnetic scattering. All of these properties can be understood as representing simple local moment behavior of the trivalent Yb ion. At 1 K there is a peak in specific heat that is too broad to represent a magnetic-phase transition, consistent with absence of magnetic reflections in neutron diffraction. On the other hand this peak also is too narrow to represent the Kondo effect in the {Lambda}{sub 7}-doublet ground state. On the basis of the field dependence of the specific heat, we argue that antiferromagnetic (AF) short-range order (SRO) (possibly coexisting with Kondo physics) occurs at low temperatures. The long-range magnetic order is suppressed because the Yb site occupancy is below the percolation threshold for this disordered compound.

Klimczuk, T [Los Alamos National Lab and European Commission, JRC; Wang, Cuihuan [ORNL; Lawrence, J. M. [University of California, Irvine; Xu, Q. [University of Antwerp; Durakiewicz, T. [Los Alamos National Laboratory (LANL); Ronning, F [Los Alamos National Laboratory (LANL); Llobet, A [Los Alamos National Laboratory (LANL); Trouw, F. [Los Alamos National Laboratory (LANL); Kurita, N [Los Alamos National Laboratory (LANL); Tokiwa, Y [Los Alamos National Laboratory (LANL); Lee, Han-oh [Los Alamos National Laboratory (LANL); Booth, C. H. [Lawrence Berkeley National Laboratory (LBNL); Gardner, J. S. [National Institute of Standards and Technology (NIST); Bauer, E. D. [Los Alamos National Laboratory (LANL); Joyce, J. J. [Los Alamos National Laboratory (LANL); Zandbergen, H. W. [Oak Ridge National Laboratory (ORNL); Movshovich, R [Los Alamos National Laboratory (LANL); Cava, R J [Princeton University; Thompson, J. D. [Los Alamos National Laboratory (LANL)

2011-01-01T23:59:59.000Z

147

Direct Observation of Coexistence of Ferromagnetism and Superconductivity in RuSr2(Gd0.7Ce0.3)2Cu2O10  

E-Print Network (OSTI)

Recent reports of the detecting of ferromagnetism and superconductivity in ruthenium-cuprates have aroused great interest. Unfortunately, whether the two antagonistic phenomena coexist in the same space in the compounds remains unresolved. By employing the magneto-optical-imaging technique, ferromagnetism and superconductivity were indeed directly observed to coexist in the same space in RuSr2(Gd0.7Ce0.3)2Cu2O10 within the experimental resolution of ? 10 µm. The observation sets a length scale limit for models proposed to account for the competition between ferromagnetism and superconductivity, especially d-wave superconductivity, in this interesting class of compounds.

unknown authors

2008-01-01T23:59:59.000Z

148

Bewerbung fr die Dr. Hans Riegel-Fachpreise fr Chemie, Geographie, Mathematik und Physik Ja, ich mchte mit meiner Arbeit an der Vergabe des Dr. Hans Riegel-Fachpreises teilnehmen (bitte pro Formblatt nur eine  

E-Print Network (OSTI)

Bewerbung für die Dr. Hans Riegel-Fachpreise für Chemie, Geographie, Mathematik und Physik Ja, ich nur eine Nennung): im Fach Chemie im Fach Geographie im Fach Mathematik im Fach Physik

Fiebig, Peter

149

Ru!fsa!!  

Office of Legacy Management (LM)

prejmt . Rufsa sgI51k ains . : r l u s e l i c c u at c r t ; JIIIIU:,ILIIII UII ENGINEERING 'IITH NUCLEAR EXPLOSIVES . . (4th Plovjshare Symposium) . .. ......

150

Dpon ru Paean 1  

E-Print Network (OSTI)

Description (to be used in archive entry) The lyrics state, "Sheep wool is smooth in the fourth lunar month, the time when adults are happy. Female yaks are full of milk in the fifth lunar month, the time when singers are happy. Horses are in good shape...

Gcod pa don 'grub

151

Spin-torque diode spectrum of ferromagnetically coupled (FeB/CoFe)/Ru/(CoFe/FeB) synthetic free layer  

SciTech Connect

We investigated systematically the spin torque diode spectrum of a ferromagnetically coupled (FeB/CoFe)/Ru/(CoFe/FeB) synthetic free layer in an MgO-based magnetic tunnel junction. In the spectra, we observed single peaks shifted to higher frequency with increasing the in-plane magnetic fields, as expected from the ferromagnetic resonance of the FeB/CoFe adjacent to the MgO tunnel barrier. On the other hand, under the perpendicular fields, we observed several peaks below 6 GHz and around 10 GHz, which were rather insensitive to the field. These behaviors are different from our simple calculation taking account the interlayer coupling, suggesting that the excitation of magnetizations occurs in a complicated manner for the synthetic free layers.

Bang, Do; Taniguchi, Tomohiro; Kubota, Hitoshi; Yorozu, Takehiko; Imamura, Hiroshi; Yakushiji, Kay; Fukushima, Akio; Yuasa, Shinji; Ando, Koji [National Institute of Advanced Industrial Science and Technology (AIST), Central 2, Umezono 1-1-1, Tsukuba, Ibaraki 305-8568 (Japan)

2012-04-01T23:59:59.000Z

152

Structurally-driven metal-insulator transition in Ca{sub 2}Ru{sub 1-x}Cr{sub x}O{sub 4} (0{<=}x<0.14): A single crystal X-ray diffraction study  

Science Conference Proceedings (OSTI)

Correlation between structure and transport properties are investigated in high-quality single-crystals of Ca{sub 2}Ru{sub 1-x}Cr{sub x}O{sub 4} with 013.5% and the system behaves as an insulator. Such a large, sharp metal-insulator transition and tuneable transition temperature may have potential applications in electronic devices. -- Graphical abstract: The metal-insulator transition temperature (T{sub MI}) was drastically reduced by Cr doping, and is closely related to the distortion of structure. Display Omitted Research highlights: {yields} The metal-insulator transition temperature (T{sub MI}) was drastically reduced by doping Cr into Ca{sub 2}RuO{sub 4} single crystal. {yields} Detailed single crystal structural analysis provided important insight into this structurally-driven metal-insulator transition. {yields} Negative Volume Thermal Expansion (NVTE) was observed with increasing temperature.

Qi, T.F., E-mail: tqi2@uky.ed [Center for Advanced Materials, University of Kentucky, Lexington, KY 40506 (United States); Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506 (United States); Ge, M. [Center for Advanced Materials, University of Kentucky, Lexington, KY 40506 (United States); High Magnetic Field Laboratory, University of Science and Technology of China, Hefei, Anhui 230026 (China); Korneta, O.B. [Center for Advanced Materials, University of Kentucky, Lexington, KY 40506 (United States); Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506 (United States); Parkin, S. [Center for Advanced Materials, University of Kentucky, Lexington, KY 40506 (United States); Department of Chemistry, University of Kentucky, Lexington, KY 40506 (United States); De Long, L.E.; Cao, G. [Center for Advanced Materials, University of Kentucky, Lexington, KY 40506 (United States); Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506 (United States)

2011-04-15T23:59:59.000Z

153

Fischer-Tropsch Synthesis: Influence of CO Conversion on Selectivities H2/CO Usage Ratios and Catalyst Stability for a 0.27 percent Ru 25 percent Co/Al2O3 using a Slurry Phase Reactor  

SciTech Connect

The effect of CO conversion on hydrocarbon selectivities (i.e., CH{sub 4}, C{sub 5+}, olefin and paraffin), H{sub 2}/CO usage ratios, CO{sub 2} selectivity, and catalyst stability over a wide range of CO conversion (12-94%) on 0.27%Ru-25%Co/Al{sub 2}O{sub 3} catalyst was studied under the conditions of 220 C, 1.5 MPa, H{sub 2}/CO feed ratio of 2.1 and gas space velocities of 0.3-15 NL/g-cat/h in a 1-L continuously stirred tank reactor (CSTR). Catalyst samples were withdrawn from the CSTR at different CO conversion levels, and Co phases (Co, CoO) in the slurry samples were characterized by XANES, and in the case of the fresh catalysts, EXAFS as well. Ru was responsible for increasing the extent of Co reduction, thus boosting the active site density. At 1%Ru loading, EXAFS indicates that coordination of Ru at the atomic level was virtually solely with Co. It was found that the selectivities to CH{sub 4}, C{sub 5+}, and CO{sub 2} on the Co catalyst are functions of CO conversion. At high CO conversions, i.e. above 80%, CH{sub 4} selectivity experienced a change in the trend, and began to increase, and CO{sub 2} selectivity experienced a rapid increase. H{sub 2}/CO usage ratio and olefin content were found to decrease with increasing CO conversion in the range of 12-94%. The observed results are consistent with water reoxidation of Co during FTS at high conversion. XANES spectroscopy of used catalyst samples displayed spectra consistent with the presence of more CoO at higher CO conversion levels.

W Ma; G Jacobs; Y Ji; T Bhatelia; D Bukur; S Khalid; B Davis

2011-12-31T23:59:59.000Z

154

Crystal fields, disorder, and antiferromagnetic short-range order in (Yb{sub 0.24}Sn{sub 0.76})Ru  

SciTech Connect

We report extensive measurements on a new compound (Yb{sub 0.24}Sn{sub 0.76})Ru that crystallizes in the cubic CsCl structure. Valence band photoemission and L{sub 3} x-ray absorption show no divalent component in the 4f configuration of Yb. Inelastic neutron scattering (INS) indicates that the eight-fold degenerate J-multiplet of Yb{sup 3+} is split by the crystalline electric field (CEF) into a ?{sub 7} doublet ground state and a ?{sub 8} quartet at an excitation energy 20 meV. The magnetic susceptibility can be fit very well by this CEF scheme under the assumption that a ?{sub 6} excited state resides at 32 meV; however, the ?{sub 8}/?{sub 6} transition expected at 12 meV was not observed in the INS. The resistivity follows a Bloch-Grüneisen law shunted by a parallel resistor, as is typical of systems subject to phonon scattering with no apparent magnetic scattering. All of these properties can be understood as representing simple local moment behavior of the trivalent Yb ion. At 1 K, there is a peak in specific heat that is too broad to represent a magnetic phase transition, consistent with absence of magnetic reflections in neutron diffraction. On the other hand, this peak also is too narrow to represent the Kondo effect in the ?{sub 7} ground state doublet. On the basis of the field-dependence of the specific heat, we argue that antiferromagnetic shortrange order (possibly co-existing with Kondo physics) occurs at low temperatures. The long-range magnetic order is suppressed because the Yb site occupancy is below the percolation threshold for this disordered compound.

Klimczuk, T.; Wang, C. H.; Lawrence, J. M.; Xu, Q.; Durakiewicz, T.; Ronning, F.; Llobet, A.; Trouw, F.; Kurita, N.; Tokiwa, Y.; Lee, Han-oh; Booth, C. H.; Gardner, J. S.; Bauer, E. D.; Joyce, J. J.; Zandbergen, H. W.; Movshovich, R.; Cava, R. J.; Thompson, J. D.

2011-07-18T23:59:59.000Z

155

Kinetics and mechanisms of the reactions of alkyl radicals with oxygen and with complexes of Co(III), Ru(III), and Ni(III)  

Science Conference Proceedings (OSTI)

The kinetics of the reactions of C{sub 2}H{sub 5} radical with Co(NH{sub 3}){sub 5}X{sup 2+}, Ru(NH{sub 3}){sub 5}X{sup 2+}, and Co(dmgH){sub 2} (X) (Y) (X = Br, Cl, N{sub 3}, SCN; Y = H{sub 2}O, CH{sub 3}CN) complexes were studied using laser flash photolysis of ethylcobalt complexes. The kinetics were obtained by the kinetic probe method. Some relative rate constants were also determined by a competition method based on ethyl halide product ratios. The kinetics of colligation reactions of a series of alkyl radicals with {beta}-Ni(cyclam){sup 2+} were studied using flaser flash photolysis of alkylcobalt complexes. Again, the kinetics were obtained by employing the kinetic probe competition method. The kinetics of the unimolecular homolysis of a series of RNi(cyclam)H{sub 2}O{sup 2+} were studied. Activation parameters were obtained for the unimolecular homolysis of C{sub 2}H{sub 5}Ni(cyclam)H{sub 2}O{sup 2+}. Kinetic and thermodynamic data obtained from these reactions were compared with those for the {sigma}-bonded organometallic complexes. The kinetics of the unimolecular homolysis of a series of RNi(cyclam)H{sub 2}O{sup 2+} complexes were studied by monitoring the formation of the oxygen insertion product RO{sub 2}Ni(cyclam)H{sub 2}O{sup 2+}. The higher rate constants for the reactions of alkyl radicals with oxygen in solution, as compared with those measured in the gas phase, were discussed. 30 refs.

Kelley, D.

1990-10-08T23:59:59.000Z

156

LOW-TEMPERATURE ION TRAP STUDIES OF N{sup +}({sup 3} P{sub ja} ) + H{sub 2}(j) {yields} NH{sup +} + H  

SciTech Connect

Using a low-temperature 22-pole ion trap apparatus, detailed measurements for the title reaction have been performed between 10 K and 100 K in order to get some state specific information about this fundamental hydrogen abstraction process. The relative population of the two lowest H{sub 2} rotational states, j = 0 and 1, has been varied systematically. NH{sup +} formation is nearly thermo-neutral; however, to date, the energetics are not known with the accuracy required for low-temperature astrochemistry. Additional complications arise from the fact that, so far, there is no reliable theoretical or experimental information on how the reactivity of the N{sup +} ion depends on its fine-structure (FS) state {sup 3} P{sub ja} . Since in the present trapping experiment, thermalization of the initially hot FS population competes with hydrogen abstraction, the evaluation of the decay of N{sup +} ions over long storage times and at various He and H{sub 2} gas densities provides information on these processes. First assuming strict adiabatic behavior, a set of state specific rate coefficients is derived from the measured thermal rate coefficients. In addition, by recording the disappearance of the N{sup +} ions over several orders of magnitude, information on nonadiabatic transitions is extracted including FS-changing collisions.

Zymak, I.; Hejduk, M.; Mulin, D.; Plasil, R.; Glosik, J.; Gerlich, D. [Faculty of Mathematics and Physics, Charles University, Prague (Czech Republic)

2013-05-01T23:59:59.000Z

157

JA ARGANG 11 WINTER / 2004  

E-Print Network (OSTI)

quieren vender PEMEX o sea el petróleo que es de los mexicanos, y la única diferencia es que unos dicen

Franssen, Michael

158

"I shall love you up to the death" (Marie-Antoinette to Axel von Fersen)  

E-Print Network (OSTI)

HY M& NP OQ RU K AL BO CP DG ER FS HU IX KY MZ N& QT L AM BZ CD EG FI HK LN OR PS QU TY X& M AN BO CP-256. [3] David Kahn, The Code-Breakers, Scribner 1996. [4] Evelyne Lever, Marie-Antoinette Correspondance

International Association for Cryptologic Research (IACR)

159

ANNUAL REPORT 2008 School of Engineering Sciences  

E-Print Network (OSTI)

cederwall@nuclear.kth.se Gudowski, Waclaw Prof. of Reactor Physics gudowski@istc.ru Johnson, Arne Prof@math.kth.se Forsgren, Anders Prof. of Optimization and Systems Theory andersf@kth.se Hertz, Hans Prof. of Biomedical. of Optimization and Systems Theory hu@math.kth.se Brismar, Hjalmar Prof. of Experimental Biological Physics

Haviland, David

160

RU-98-30 Lattice Chirality ?  

E-Print Network (OSTI)

The external fermion propagator and the internal fermion propagator in the overlap are given by different matrices. A generic problem (formulated by Pelissetto) faced by all chiral, non-local, propagators of Rebbi type is avoided in this manner. Nussinov-Weingarten-Witten mass inequalities are exactly preserved. It is sketched how to obtain simple lattice chiral Yukawa models and simple expressions for covariant currents. Going beyond my oral presentation, I have added to the write-up several comments on Niedermayer’s talk. His transparencies are available on the internet. Chiral symmetry was built into the overlap from day one. Each Weyl fermion is represented by an infinite tower and coherent unitary rotations of left-towers into linear combinations of left towers (the same holds for right towers) are exact global symmetries in vector-like gauge theories. These are symmetries of the fermion quantum system underlying the overlap and are realized canonically. There are also global U(1) symmetries

Herbert Neuberger A

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hu ja ru" 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

Ying Hu,Anthony Kuh, and Aleksandar Kavcic University of Hawaii at Manoa, USA  

E-Print Network (OSTI)

- able energy management system into the Smart-Grid Distribution Management System (DMS) and automated, "Modeling of pseudo-measurements for distribution system state estimation," in Proc. SmartGrids

Kavcic, Aleksandar

162

Review of wind power tariff policies in China Zheng Hu a,n  

E-Print Network (OSTI)

the share of renewable energy (i.e., make the transition from thermal power to clean energy). For instance Kurdgelashvili a a Centre for Energy and Environmental Policy, 278 Graham Hall, University of Delaware, Newark. Incentives are in place for German and Danish offshore wind power, while China will have to remove

Delaware, University of

163

atw.hu, atw, ATW Internet - domain, t rhely, szerver-hosting  

U.S. Energy Information Administration (EIA)

Left side shows your rank among other websites. Every bar means 1.000.000 websites. Your website is not ranked ...

164

Real-time State Estimation on Micro-grids Ying Hu, Anthony Kuh, Aleksandar Kavcic  

E-Print Network (OSTI)

transmission and distribution networks which may include HVDC and MVDC, energy storage, microgrids, renewable

Kavcic, Aleksandar

165

R. Goebel, A. Teel, T. Hu, and Z. Lin, Conjugate convex ... - CECM  

E-Print Network (OSTI)

R. Goebel, Stabilizing a linear system with saturation through optimal control, to ... R. Goebel, Duality and uniqueness of convex solutions to stationary Hamilton-  ...

166

RANDOMIZED SVD METHODS IN HYPERSPECTRAL JIANI ZHANG, JENNIFER ERWAY, XIAOFEI HU, QIANG ZHANG,  

E-Print Network (OSTI)

example is in the atmospheric correction model called MODTRAN5 [21], that utilizes large lookup tables, M. Fox, S. Adler- Golden, J. Chetwynd, M. Hoke et al., "Modtran 5: a reformulated atmospheric band

Erway, Jennifer

167

Evaluation of Three Planetary Boundary Layer Schemes in the WRF Model XIAO-MING HU  

E-Print Network (OSTI)

of air from above the PBL. A sensitivity experiment with the ACM2 scheme confirms this diagnosis. 1 the planetary boundary layer (PBL), is important for air pollution modeling, and PBL parameterization schemes­Yamada­Janjic (MYJ), Yonsei University (YSU), and the asymmetric convective model, version 2 (ACM2)]. Comparison

168

MTHE AMERICAN MATHEMATICAL Robert E, Megginson Yueh-Gin Gung and Dr. Charles Y. Hu  

E-Print Network (OSTI)

. ByJohn B. Fraleigh and RaymondA. Beauregard Linear Algebra and its Applications, 3rd ed. By David C

Benjamin, Arthur T.

169

Packet Filtering to Defend Flooding-Based DDoS Yen-Hung Hu  

E-Print Network (OSTI)

-Ah Choi Department of Computer Science George Washington University Washington, DC 20052¢ yenhung to defend DDoS attacks. Our approach is a time-window based filtering mechanism processed before a queue management policy is applied. Setting the window size properly and dropping packets reaching in the next

Choi, Hyeong-Ah

170

Packet Filtering for Congestion Control under DoS Attacks Yen-Hung Hu  

E-Print Network (OSTI)

Science George Washingtin University Washington, DC 20052 yenhung@gwu.edu Hongsik Choi Department Department of Computer Science George WAshington University Washington, DC 20052 hchoi@gwu.edu Abstract the window period is defined as DC E ' ' GFIH , where ' denotes the to- tal number of bits

Choi, Hyeong-Ah

171

HU ET AL. VOL. XXX ' NO. XX ' 000000 ' XXXX www.acsnano.org  

E-Print Network (OSTI)

densities but lower energy densities compared to batteries.1Ã?6 For certain appli- cations, such as large nano- structures have been reported to overcome the problems of low electrical and ionic con PEDOT to effectively improve the usage of MnO2 and the overall device performance.24 Lee et al. used

Cui, Yi

172

Prospect of Tunneling Green Transistor for 0.1V CMOS Chenming Hu1*  

E-Print Network (OSTI)

. At points of lower doping (Fig. 4) the turn-on voltages and electric field (therefore ION) are both lower Majhi2 , Ali Javey1 , Tsu-Jae King Liu1 , Raj Jammy2 1 Dept. of Electrical Eng. and Computer Science usage was kept under control when VDD was reduced in proportion to half-pitch up to 130nm as shown

Javey, Ali

173

2008 Joint Appendices JA2-1 Appendix JA2 Reference Weather/Climate Data  

E-Print Network (OSTI)

Dimension Stone 14742 Potash Nonmetal 10110 Iron ore Metal 14743 Trona Nonmetal 10210 Copper ore Metal 14744

174

acs_JA_ja-2010-08948z 1..9  

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

routes to high-quality NCs with tunable sizes and shapes predominantly employ long hydro- carbon molecules containing a coordinating headgroup such as oleic acid (OA) and...

175

Fast Specification of CycleAccurate Processor Models Felix ShengHo Chang and Alan J. Hu  

E-Print Network (OSTI)

Architecture, Vancouver, British Columbia, June 2000. [4] Doug Burger and Todd M. Austin. The simplescalar tool,ling@cs.utexas.edu Abstract Many speculative microarchitectural techniques such as eager execution, value prediction, pipeline pipeline gating. Using previous confidence estimators, pipeline gating reduces the amount of extra work due

Hu, Alan J.

176

ET Parameters for Mixed-Valence Ru Complexes  

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

Convergence of Spectroscopic and Kinetic Electron Transfer Parameters for Convergence of Spectroscopic and Kinetic Electron Transfer Parameters for Mixed-Valence Binuclear Dipyridylamide Ruthenium Ammine Complexes Alison J. Distefano, James F. Wishart, and Stephan S. Isied Coord. Chem. Rev. 249, 507-516 (2005). [Find paper at Elsevier Science Direct] Abstract: A series of binuclear ruthenium(II,III) pentaammine complexes bridged by 4-pyridyl isonicotinamide (iso-apy) and methyl, 4-pyridyl isonicotinamide (iso-mapy), and their mononuclear congeners, were studied by spectroscopic and kinetic techniques. The amide functionality provides asymmetry between the electronic environments of the metal ions bound to the aminopyridine (apy) and pyridine carbonyl (iso) ends. The resulting difference is observed in the charge transfer spectra and the

177

Hydrogen adsorption on Ru(001) studied by Scanning Tunneling Microscopy  

E-Print Network (OSTI)

R.B. Anderson, The Fisher-Tropsch and Related Syntheses,for example in Fisher-Tropsch and Ammonia Synthesis

Tatarkhanov, Mous; Rose, Franck; Fomin, Evgeny; Ogletree, D. Frank; Salmeron, Miquel

2008-01-01T23:59:59.000Z

178

Time and Frequency from A to Z: Re to Ru  

Science Conference Proceedings (OSTI)

... The natural frequency of an oscillator. ... The optical beam from the rubidium lamp pumps the 87 Rb buffer gas atoms into a particular energy state. ...

2010-10-05T23:59:59.000Z

179

http://www.kyoto-u.ac.jp/ja 22 22  

E-Print Network (OSTI)

://www.kyoto-u.ac.jp/en Integrated Human Studies Integrated Human Studies Letters Letters Education Educational Sciences Law Economics Economics and Management Science Science Medicine Medical Science (6) Human Health Sciences Pharmaceutical Sciences Pharmaceutical Sciences Pharmacy (6) Engineering Global Engineering, Architecture

Takada, Shoji

180

http://www.kyoto-u.ac.jp/ja 22 22  

E-Print Network (OSTI)

://www.kyoto-u.ac.jp/en Integrated Human Studies Integrated Human Studies Letters Letters Education Educational Sciences Law Economics Economics and Management Science Science Medicine Medical Science (6) Human Health Sciences Pharmaceutical Sciences Sciences for Drug Discovery Pharmacy (6) Engineering Global Engineering, Architecture

Takada, Shoji

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181

Electronic Journal of Qualitative Theory of Differential Eq* 2004***, No. 1***, 1-14; http://www.math.u-szeged.hu/ejqtde/  

E-Print Network (OSTI)

, chemical kinetics, negative cross-effects AMS Subject Classification (2000): Primary: 34C20; Secondary: 80A majority of chaotic polynomial differential equations cannot be considered as chemical kinetic models]King, R. B.: Chemical applications of topology and group theory, 14. Topological aspects

Tóth, János

182

PHARE TDQM Villamosm'enoki szakmodul HU 9305 1330/B 3.2 A megb'izhat'os'ag mint v'eletlen folyamat  

E-Print Network (OSTI)

Department of Defense military handbook MIL-HDBK-217 [DoD 1992]. This aims to predict the failure rate

Telek, Miklós

183

Phase diagram and universality of the Lennard-Jones gas-liquid system Hiroshi Watanabe, Nobuyasu Ito, and Chin-Kun Hu  

E-Print Network (OSTI)

Phase diagram and universality of the Lennard-Jones gas-liquid system Hiroshi Watanabe, Nobuyasu JOURNAL OF CHEMICAL PHYSICS 136, 204102 (2012) Phase diagram and universality of the Lennard-Jones gas-liquid; published online 23 May 2012) The gas-liquid phase transition of the three-dimensional Lennard

184

Weaver, P.P.E., Schmincke, H.-U., Firth, J.V., and Duffield, W. (Eds.), 1998 Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 157  

E-Print Network (OSTI)

and Mari Sumita2 ABSTRACT Sixty-eight fallout trachytic to phonolitic ash layers recovered from Sites 953 on land were confirmed. Apparently fallout ash layers in the marine environment provide a more reliable, and fallout tephra layers whose age ranges from ~3 Ma at the discontinuously exposed Lower Group at the base

185

Weaver, P.P.E., Schmincke, H.-U., Firth, J.V., and Duffield, W. (Eds.), 1998 Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 157  

E-Print Network (OSTI)

of feldspar crystals from 58 samples of welded ignimbrites, lava flows, fallout tephra layers, and intrusive, and fallout tephra, as well as rare basanite and nephelinite dikes and lavas were erupted between 13.29 Ma spectrum of igneous rocks, as well as frequent explosive rhyolitic, trachytic, and phonolitic fallout ashes

186

Weaver, P.P.E., Schmincke, H.-U., Firth, J.V., and Duffield, W. (Eds.), 1998 Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 157  

E-Print Network (OSTI)

­PLEISTOCENE FALLOUT TEPHRA LAYERS AND VOLCANICLASTIC DEPOSITS IN THE SEDIMENTARY APRONS OF GRAN CANARIA AND TENERIFE (SITES 953, 954, AND 956)1 Paul van den Bogaard2 ABSTRACT Six fallout tephra layers and 16. The fallout tephra markers range in age from 0.273 ± 0.006 Ma to 2.74 ± 0.01 Ma. Maximum sedimentation ages

187

Determining the Behavior of RuO(x) Nanoparticles in Mixed-Metal Oxides:  

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

Mechanism of Ethanol Synthesis from Syngas on Rh(111) Understanding of Mechanism of Ethanol Synthesis from Syngas on Rh(111) Understanding of ethanol decomposition on Rh(1 1 1) from density functional theory and kinetic Monte Carlo simulations Theoretical perspective of alcohol decomposition and synthesis from CO2 hydrogenation