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1

Tellurium-118/antimony-118 generator  

NASA Astrophysics Data System (ADS)

This research develops a radioisotope generator to obtain Sb-118 (3.5 m half-life, 75 percent positron s) from the 6.0 d Te-118 parent. About 2 mCi of Te-118 was produced per run. Gamma ray analysis with a GeLi detector indicated the production of Te-118/Sb-118, Sb-120, Sb-122, Te-119/Sb-119, Te-119m/Sb-119, Te-121, and Te-121m. The Sb target was brought into solution with HCl and HNO3 acid. Six percent sodium tartrate was added to the target solution to form the Sb-tartrate complex for loading onto an inorganic ion exchange column of neutal alumina (Al2O3) and SnO2. Six percent sodium tartrate at various pH's ranging from 2 to 8 were used as the eluent solutions. Elution yields of Sn-118 and breakthroughs of Te radioisotopes were determined by dose calibrator measurements and GeLi analysis. Results indicate that the Sn-118 yield at pH 7.0 from the SnO2 was twice the yield from Al2O3 with 6 percent tartrate, while the breakthroughs of Te radioactivity were nearly comparable for the two columns. However, elutions with 6 percent tartrate at pH 3.5 doubled the yield of Sb-118 from Al2O3 while elutions at pH 3.5 from SnO2 increased the Sb-118 yield about 28 percent. Cumulative elution volumes of 6 percent tartrate at pH 7.0 from either Al2O3 or SnO2 led to a gradual reduction in Sb-118 yield from about 25 percent down to 5 to 6 percent. Elutions at pH 3.5, led to a higher yield without a gradual reduction in yield with cumulative elution volumes of 6 percent tartrate. A pH of 5.0 was finally chosen as the best compromise between sustained levels of Sb-118 yield and the biological and chemical advantages of working at a pH higher than 3.5. Exchange labeling was used to label thio compounds with the Sb-118-tartrate from the generator.

Yano, Y.; Lagunas-Solar, M.

1989-06-01

2

The role of the solvent in the ultrashort laser ablation of palladium target in liquid  

NASA Astrophysics Data System (ADS)

In the present study, the pulsed laser ablation in liquid technique was used to produce palladium nanoparticles in acetone and in water. The composition, morphology and oxidation state of the obtained nanoparticles have been characterized by HR-TEM, XPS and XRD techniques. The results evidence that the nature of the solvent influences the physical-chemical properties of the products. In acetone non-aggregate metallic nanoparticles have been obtained, while in water the oxidation of the particles surface is present, as showed by the XPS analysis. Moreover, the particles obtained in water are aggregated and the coalescence effect is evident. The different size distributions of nanoparticles obtained in the two liquids have been interpreted considering the different cavitation bubble dynamics.

De Bonis, A.; Sansone, M.; Galasso, A.; Santagata, A.; Teghil, R.

2014-10-01

3

The pterocarpanquinone LQB-118 induces apoptosis in acute myeloid leukemia cells of distinct molecular subtypes and targets FoxO3a and FoxM1 transcription factors.  

PubMed

Acute myeloid leukemia (AML) patients' outcome is usually poor, mainly because of drug resistance phenotype. The identification of new drugs able to overcome mechanisms of chemoresistance is essential. The pterocarpanquinone LQB-118 compound has been shown to have a potent cytotoxic activity in myeloid leukemia cell lines and patient cells. Our aim was to investigate if LQB-118 is able to target FoxO3a and FoxM1 signaling pathways while sensitizing AML cell lines. LQB-118 induced apoptosis in both AML cell lines HL60 (M3 FAB subtype) and U937 (M4/M5 FAB subtype). Cell death occurred independently of alterations in cell cycle distribution. In vivo administration revealed that LQB-118 was not cytotoxic to normal bone marrow-derived cells isolated from mice. LQB-118 induced FoxO3a nuclear translocation and upregulation of its direct transcriptional target Bim, in HL60 cells. However, LQB-118 induced FoxO3a nuclear exclusion, followed by Bim downregulation, in U937 cells. Concomitantly, LQB-118 exposure reduced FoxM1 and Survivin expression in U937 cells, but this effect was more subtle in HL60 cells. Taken together, our data suggest that LQB-118 has a selective and potent antitumor activity against AML cells with distinct molecular subtypes, and it involves differential modulation of the signaling pathways associated with FoxO3a and FoxM1 transcription factors. PMID:25174716

Nestal de Moraes, Gabriela; Castro, Carolina Pereira; Salustiano, Eduardo Jesus; Dumas, Matheus Lourenço; Costas, Fernanda; Lam, Eric Wing-Fai; Costa, Paulo Roberto Ribeiro; Maia, Raquel Ciuvalschi

2014-11-01

4

Formal total syntheses of classic natural product target molecules via palladium-catalyzed enantioselective alkylation  

PubMed Central

Summary Pd-catalyzed enantioselective alkylation in conjunction with further synthetic elaboration enables the formal total syntheses of a number of “classic” natural product target molecules. This publication highlights recent methods for setting quaternary and tetrasubstituted tertiary carbon stereocenters to address the synthetic hurdles encountered over many decades across multiple compound classes spanning carbohydrate derivatives, terpenes, and alkaloids. These enantioselective methods will impact both academic and industrial settings, where the synthesis of stereogenic quaternary carbons is a continuing challenge. PMID:25383121

Liu, Yiyang; Liniger, Marc; McFadden, Ryan M; Roizen, Jenny L; Malette, Jacquie; Reeves, Corey M; Behenna, Douglas C; Seto, Masaki; Kim, Jimin; Mohr, Justin T; Virgil, Scott C

2014-01-01

5

Sputter target  

DOEpatents

The disclosure relates to an improved sputter target for use in the deposition of hard coatings. An exemplary target is given wherein titanium diboride is brazed to a tantalum backing plate using a gold-palladium-nickel braze alloy.

Gates, Willard G. (Kansas City, MO); Hale, Gerald J. (Overland Park, KS)

1980-01-01

6

Mechanism of Action of a Palladium Modifier on Atomization Processes  

NASA Astrophysics Data System (ADS)

We have demonstrated a desorption mechanism for dissipation of palladium from a palladium modifier in a graphite furnace during sample atomization. We have carried out mathematical modeling with the aim of obtaining the most important kinetic parameters of the atomization processes: diffusion rate and energy of formation of free atoms. The energy of formation of free silver atoms in the presence of palladium, calculated from the shape of the signals, increases from 118.5 ± 6.3 to 199.5 ± 8.4 kJ/mol, while the activation energy for diffusion of silver in the graphite of the furnace walls increases from 75.6 ± 1.1 to 135.2 ± 6.0 kJ/mol, which suggests direct chemical reaction between palladium and silver.

Rogulsky, Yu. V.; Illiashenko, V. Yu.; Kulik, A. N.

2014-01-01

7

INNOVATIONS IN PALLADIUM MEMBRANE RESEARCH  

Microsoft Academic Search

This review highlights various aspects of current palladium membrane research and serves as a comprehensive bibliography covering palladium membrane preparation methods and applications. There are many promising uses for palladium membranes, although widespread use of the available technologies is constrained primarily by the high cost of palladium, lack of durability due to hydrogen embrittlement, and susceptibility to fouling. Various researchers

S. N. Paglieri

2002-01-01

8

STS-118 Launch  

NASA Technical Reports Server (NTRS)

Enroute to the International Space Station (ISS), Space Shuttle Endeavor and its seven member STS-118 crew, blasted off from the launch pad at Kennedy Space Center on August 8, 2007. Construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the third Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of equipment and supplies.

2007-01-01

9

Final Hazard Categorization for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2, and 118-H-3 Solid Waste Burial Grounds  

SciTech Connect

This report presents the final hazard categorization (FHC) for the remediation of the 118-D-1, 118-D-2, and 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site.

T. J. Rodovsky

2006-12-06

10

Final Hazard Categorization for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2, and 118-H-3 Solid Waste Burial Grounds  

SciTech Connect

This report presents the final hazard categorization (FHC) for the remediation of the 118-D-1, 118-D-2, and 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site.

T. J. Rodovsky

2007-04-12

11

Final Hazard Categorization and Auditable Safety Analysis for the Remediation of the 118-D-1, 118-D-2, 118-D-3, 118-H-1, 118-H-2 and 118-H-3 Solid Waste Burial Grounds  

SciTech Connect

This report presents the initial hazard categorization, final hazard categorization and auditable safety analysis for the remediation of the 118-D-1, 118-D-2, and 118-D-3 Burial Grounds located within the 100-D/DR Area of the Hanford Site and the 118-H-1, 118-H-2, and 118-H-3 Burial Grounds located within the 100-H Area of the Hanford Site.

T. J. Rodovsky

2006-03-01

12

40 CFR 35.118 - Unexpended balances.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Unexpended balances. 35.118 Section 35.118 Protection...Requirements § 35.118 Unexpended balances. Subject to any relevant provisions...Financial Status Report shows unexpended balances, the Regional Administrator will...

2010-07-01

13

46 CFR 118.300 - Fire pumps.  

Code of Federal Regulations, 2011 CFR

...Shipping 4 2011-10-01 2011-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

2011-10-01

14

46 CFR 118.300 - Fire pumps.  

Code of Federal Regulations, 2013 CFR

...Shipping 4 2013-10-01 2013-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

2013-10-01

15

46 CFR 118.300 - Fire pumps.  

Code of Federal Regulations, 2012 CFR

...Shipping 4 2012-10-01 2012-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

2012-10-01

16

46 CFR 118.300 - Fire pumps.  

Code of Federal Regulations, 2010 CFR

...Shipping 4 2010-10-01 2010-10-01 false Fire pumps. 118.300 Section 118.300 Shipping...OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS FIRE PROTECTION EQUIPMENT Fire Main System § 118.300 Fire pumps....

2010-10-01

17

Vascular Targeted Photodynamic Therapy With Palladium-Bacteriopheophorbide Photosensitizer for Recurrent Prostate Cancer Following Definitive Radiation Therapy: Assessment of Safety and Treatment Response  

Microsoft Academic Search

Purpose: Tookad® is a novel intravascular photosensitizer. When activated by 763 nm light, it destroys tumors by damaging their blood supply. It then clears rapidly from the circulatory system. To our knowledge we report the first application of Tookad vascular targeted photodynamic therapy in humans. We assessed the safety, pharmacokinetics and preliminary treatment response as a salvage procedure after external

J. Trachtenberg; A. Bogaards; R. A. Weersink; M. A. Haider; A. Evans; S. A. McCluskey; A. Scherz; M. R. Gertner; C. Yue; S. Appu; A. Aprikian; J. Savard; B. C. Wilson; M. Elhilali

2007-01-01

18

MONTANA PALLADIUM RESEARCH INITIATIVE  

SciTech Connect

Project Objective: The overarching objective of the Montana Palladium Research Initiative is to perform scientific research on the properties and uses of palladium in the context of the U.S. Department of Energy'Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?s Hydrogen, Fuel Cells and Infrastructure Technologies Program. The purpose of the research will be to explore possible palladium as an alternative to platinum in hydrogen-economy applications. To achieve this objective, the Initiatives activities will focus on several cutting-edge research approaches across a range of disciplines, including metallurgy, biomimetics, instrumentation development, and systems analysis. Background: Platinum-group elements (PGEs) play significant roles in processing hydrogen, an element that shows high potential to address this need in the U.S. and the world for inexpensive, reliable, clean energy. Platinum, however, is a very expensive component of current and planned systems, so less-expensive alternatives that have similar physical properties are being sought. To this end, several tasks have been defined under the rubric of the Montana Palladium Research Iniative. This broad swath of activities will allow progress on several fronts. The membrane-related activities of Task 1 employs state-of-the-art and leading-edge technologies to develop new, ceramic-substrate metallic membranes for the production of high-purity hydrogen, and develop techniques for the production of thin, defect-free platinum group element catalytic membranes for energy production and pollution control. The biomimetic work in Task 2 explores the use of substrate-attached hydrogen-producing enzymes and the encapsulation of palladium in virion-based protein coats to determine their utility for distributed hydrogen production. Task 3 work involves developing laser-induced breakdown spectroscopy (LIBS) as a real-time, in situ diagnostic technique to characterize PGEs nanoparticles for process monitoring and control. The systems engineering work in task 4 will determine how fuel cells Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?Ã?Â?taken as systems behave over periods of time that should show how their reformers and other subsystems deteriorate with time.

Peters, John

2012-05-09

19

Palladium-Mediated Cell-Surface Labeling Christopher D. Spicer,  

E-print Network

- natural amino acids containing aryl halide side chains. This enabled site-selective cell surface-Miyaura chemistry into a cellular context, demonstrate low toxicity at effective palladium loadings, and confirm such as typhoid,17 so OmpC has become a target for vaccine platforms and for further study.14 It is therefore

Davis, Ben G.

20

Energetic and Magnetic Properties of Palladium Clusters  

NASA Astrophysics Data System (ADS)

The structural, energetic and magnetic properties of palladium clusters from 2 to 55 atoms were calculated using Density Functional method with plane wave basis set. The results show that the binding energies increase rapidly from 0.595 eV to 1.60 eV within 4 atoms, then gradually to 2.79 eV with 55 atoms. The calculated bulk cohesive energy is 3.68 eV. For a given number of atoms, the binding energies of small palladium clusters are strongly dependent on their configurations. The three-dimensional packing with the highest density has the largest energy, while the linear arrangement has the smallest one. Although the binding energies of both linear and planar arrangements are small, these structures are stable in the absence of external fields. The binding energies of linear and planar arrangements increase slowly with increasing of the number of atoms, from 0.595 to 1.0 eV for linear and 1.18 to 1.8 eV for planar configurations, respectively. Tetrahedron for Pd_4, triangular bipyramid for Pd_5, octahedron for Pd6 and icosahedron for Pd_13 are found to be the most stable cluster structures. The fact that some other three-dimensional Pd5 and Pd6 clusters tend to transform to triangular bipyramid and octahedron was discovered and discussed. We also found that the square conformation is rather stable and some new packing styles containing square skeletons which differ from that of the bulk are examined. The magnetic property of these clusters was calculated and discussed. Some non-magnetic and high magnetic stacking patterns are predicted. an attachment.

Zhang, Wenqin; Ge, Qingfeng; Wang, Lichang

2002-03-01

21

33 CFR 118.130 - Fog signals.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Fog signals. 118.130 Section 118.130...LIGHTING AND OTHER SIGNALS § 118.130 Fog signals. On waterways where visibility is frequently reduced due to fog or other causes, the District...

2010-07-01

22

33 CFR 118.130 - Fog signals.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Fog signals. 118.130 Section 118.130...LIGHTING AND OTHER SIGNALS § 118.130 Fog signals. On waterways where visibility is frequently reduced due to fog or other causes, the District...

2011-07-01

23

33 CFR 118.130 - Fog signals.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Fog signals. 118.130 Section 118.130...LIGHTING AND OTHER SIGNALS § 118.130 Fog signals. On waterways where visibility is frequently reduced due to fog or other causes, the District...

2012-07-01

24

33 CFR 118.130 - Fog signals.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Fog signals. 118.130 Section 118.130...LIGHTING AND OTHER SIGNALS § 118.130 Fog signals. On waterways where visibility is frequently reduced due to fog or other causes, the District...

2013-07-01

25

Low-cost method for fabricating palladium and palladium-allow thin films on porous supports  

DOEpatents

A process for forming a palladium or palladium alloy membrane on a ceramic surface by forming a pre-colloid mixture comprising a powder palladium source, carrier fluid, dispersant and a pore former and a binder. Ultrasonically agitating the precolloid mixture and applying to a substrate with an ultrasonic nozzle and heat curing the coating form a palladium-based membrane.

Lee, Tae H; Park, Chan Young; Lu, Yunxiang; Dorris, Stephen E; Balachandran, Uthamalingham

2013-11-19

26

?- NMR of Palladium foil  

NASA Astrophysics Data System (ADS)

Beta-detected NMR ( ?- NMR) of low-energy implanted 8Li + was studied in metallic palladium. The resonance was found to have a large negative shift with respect to the reference signal in the cubic insulator MgO. This shift exhibited significant temperature dependence on cooling below room temperature, approximately proportionate to the temperature-dependent spin susceptibility of pure Pd. Thus it is tentatively attributed to a Knight shift ( K) caused by a large negative hyperfine coupling; a phenomenon common in transition metal ions, but not in alkalis. However, the spin-lattice relaxation of 8Li is much slower than expected from the Korringa law for such a large K. We compare results from samples of very different thicknesses: 12.5 ?m foil and a 100 nm thin film.

Parolin, T. J.; Salman, Z.; Chakhalian, J.; Wang, D.; Keeler, T. A.; Hossain, Md.; Kiefl, R. F.; Chow, K. H.; Morris, G. D.; Miller, R. I.; MacFarlane, W. A.

2006-03-01

27

Extracellular Palladium Nanoparticle Production using Geobacter sulfurreducens  

E-print Network

(II) to Pd(0), but in previous tests using dissimilatory metal reducing bacteria (DMRB), the nanoparticles, are then used to generate bulk insoluble palladium.3 The production of palladium nanoparticle catalysts (0Extracellular Palladium Nanoparticle Production using Geobacter sulfurreducens Matthew D. Yates

28

Hydrogen-sensitive palladium gate MOS capacitors  

Microsoft Academic Search

The C-V characteristics of palladium gate MOS capacitors change significantly when exposed to an air ambient containing up to 4% hydrogen. From these experiments, it is concluded that these changes are due to the lowering of the palladium work function (by as much as 1 V) brought on by the formation of palladium hydride. Mobile charges in the oxide do

Martin C. Steele; John W. Hile; Bernard A. Maciver

1976-01-01

29

Hydrogen-sensitive palladium gate MOS capacitors  

Microsoft Academic Search

The C-V characteristics of palladium gate MOS capacitors change significantly when exposed to an air ambient containing up to 4% hydrogen. From these experiments, it is concluded that these changes are due to the lowering of the palladium work function (by as much as 1 V) brought on by the formation of palladium hydride. Mobile charges in the oxide do

Martin C. Steele; John W. Hile; Bernard A. MacIver

1976-01-01

30

STS-118 Astronaut Barbara Morgan  

NASA Technical Reports Server (NTRS)

Barbara R. Morgan (center), STS-118 astronaut and mission specialist, dons a training version of her shuttle launch and entry suit, prior to the start of a mission training exercise in the Space Vehicle Mock Up Facility at Johnson Space Center. United Space Alliance (USA) personnel were on hand to assist Morgan. Morgan was chosen as the first educator to become a mission specialist astronaut in 2002. The Educator Astronaut Project evolved from the Teacher in Space Project. Both aimed to engage and attract students to explore the excitement and wonder of space flight and to inspire and support educators. Morgan's primary duty was the same as it is for the entire crew, accomplish the planned objectives of the station assembly mission. But she also took part in several education-related activities.

2007-01-01

31

7 CFR 1220.118 - Person.  

Code of Federal Regulations, 2010 CFR

...MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SOYBEAN PROMOTION, RESEARCH, AND CONSUMER INFORMATION Soybean Promotion and Research Order Definitions § 1220.118 Person. The term person...

2010-01-01

32

7 CFR 1220.118 - Person.  

...MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SOYBEAN PROMOTION, RESEARCH, AND CONSUMER INFORMATION Soybean Promotion and Research Order Definitions § 1220.118 Person. The term person...

2014-01-01

33

7 CFR 1220.118 - Person.  

Code of Federal Regulations, 2012 CFR

...MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SOYBEAN PROMOTION, RESEARCH, AND CONSUMER INFORMATION Soybean Promotion and Research Order Definitions § 1220.118 Person. The term person...

2012-01-01

34

7 CFR 1220.118 - Person.  

Code of Federal Regulations, 2011 CFR

...MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SOYBEAN PROMOTION, RESEARCH, AND CONSUMER INFORMATION Soybean Promotion and Research Order Definitions § 1220.118 Person. The term person...

2011-01-01

35

7 CFR 1220.118 - Person.  

Code of Federal Regulations, 2013 CFR

...MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SOYBEAN PROMOTION, RESEARCH, AND CONSUMER INFORMATION Soybean Promotion and Research Order Definitions § 1220.118 Person. The term person...

2013-01-01

36

Palladium/kieselguhr composition and method  

DOEpatents

A hydrogen-absorbing composition and method for making such a composition. The composition comprises a metal hydride, preferably palladium, deposited onto a porous substrate such as kieselguhr, for use in hydrogen-absorbing processes. The composition is made by immersing a substrate in a concentrated solution containing palladium, such as tetra-amine palladium nitrate. Palladium from the solution is deposited onto the porous substrate, which is preferably in the form of kieselguhr particles. The substrate is then removed from the solution, calcined, and heat treated. This process is repeated until the desired amount of palladium has been deposited onto the substrate.

Mosley, Jr., Wilbur C. (202 Fairway Dr., New Ellenton, SC 29809)

1993-01-01

37

Palladium/kieselguhr composition and method  

DOEpatents

A hydrogen-absorbing composition and method for making such a composition are described. The composition comprises a metal hydride, preferably palladium, deposited onto a porous substrate such as kieselguhr, for use in hydrogen-absorbing processes. The composition is made by immersing a substrate in a concentrated solution containing palladium, such as tetra-amine palladium nitrate. Palladium from the solution is deposited onto the porous substrate, which is preferably in the form of kieselguhr particles. The substrate is then removed from the solution, calcined, and heat treated. This process is repeated until the desired amount of palladium has been deposited onto the substrate.

Mosley, W.C. Jr.

1993-09-28

38

OCEAN DRILLING PROGRAM LEG 118 PRELIMINARY REPORT  

E-print Network

RIDGE Paul T. Robinson Co-Chief Scientist, Leg 118 Centre for Marine Geology Dalhousie University Program consisted of: Paul T. Robinson, Co-Chief Scientist (Centre for Marine Geology, Dalhousie Halifax, Nova Scotia B3H 3J5 Canada Richard P. Von Herzen Co-Chief Scientist, Leg 118 Woods Hole

39

10 CFR 1.18 - Advisory Committee on Nuclear Waste.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Advisory Committee on Nuclear Waste. 1.18 Section 1.18 Energy NUCLEAR...Committees § 1.18 Advisory Committee on Nuclear Waste. The Advisory Committee on Nuclear Waste (ACNW) provides advice to the...

2010-01-01

40

28 CFR 115.118 - Upgrades to facilities and technologies.  

Code of Federal Regulations, 2012 CFR

...facilities and technologies. 115.118 Section 115.118 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) PRISON RAPE ELIMINATION ACT NATIONAL STANDARDS Standards for Lockups Prevention Planning § 115.118 Upgrades to facilities and...

2012-07-01

41

28 CFR 115.118 - Upgrades to facilities and technologies.  

Code of Federal Regulations, 2013 CFR

...facilities and technologies. 115.118 Section 115.118 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) PRISON RAPE ELIMINATION ACT NATIONAL STANDARDS Standards for Lockups Prevention Planning § 115.118 Upgrades to facilities and...

2013-07-01

42

33 CFR 118.100 - Retroreflective panels on bridge piers.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Retroreflective panels on bridge piers. 118.100 Section 118.100 Navigation...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.100...

2010-07-01

43

33 CFR 118.100 - Retroreflective panels on bridge piers.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Retroreflective panels on bridge piers. 118.100 Section 118.100 Navigation...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.100...

2013-07-01

44

33 CFR 118.90 - Bridges crossing channel obliquely.  

Code of Federal Regulations, 2013 CFR

...Waters 1 2013-07-01 2013-07-01 false Bridges crossing channel obliquely. 118.90 Section 118...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.90 Bridges...

2013-07-01

45

33 CFR 118.90 - Bridges crossing channel obliquely.  

Code of Federal Regulations, 2012 CFR

...Waters 1 2012-07-01 2012-07-01 false Bridges crossing channel obliquely. 118.90 Section 118...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.90 Bridges...

2012-07-01

46

33 CFR 118.90 - Bridges crossing channel obliquely.  

Code of Federal Regulations, 2011 CFR

...Waters 1 2011-07-01 2011-07-01 false Bridges crossing channel obliquely. 118.90 Section 118...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.90 Bridges...

2011-07-01

47

33 CFR 118.90 - Bridges crossing channel obliquely.  

Code of Federal Regulations, 2010 CFR

...Waters 1 2010-07-01 2010-07-01 false Bridges crossing channel obliquely. 118.90 Section 118...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.90 Bridges...

2010-07-01

48

33 CFR 118.100 - Retroreflective panels on bridge piers.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false Retroreflective panels on bridge piers. 118.100 Section 118.100 Navigation...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.100...

2012-07-01

49

33 CFR 118.100 - Retroreflective panels on bridge piers.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Retroreflective panels on bridge piers. 118.100 Section 118.100 Navigation...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.100...

2011-07-01

50

48 CFR 1371.118 - Changes-ship repair.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Changes-ship repair. 1371.118 Section 1371.118 Federal...DEPARTMENT SUPPLEMENTAL REGULATIONS ACQUISITIONS INVOLVING SHIP CONSTRUCTION AND SHIP REPAIR Provisions and Clauses 1371.118...

2012-10-01

51

48 CFR 1371.118 - Changes-ship repair.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Changes-ship repair. 1371.118 Section 1371.118 Federal...DEPARTMENT SUPPLEMENTAL REGULATIONS ACQUISITIONS INVOLVING SHIP CONSTRUCTION AND SHIP REPAIR Provisions and Clauses 1371.118...

2013-10-01

52

48 CFR 1371.118 - Changes-ship repair.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Changes-ship repair. 1371.118 Section 1371.118 Federal...DEPARTMENT SUPPLEMENTAL REGULATIONS ACQUISITIONS INVOLVING SHIP CONSTRUCTION AND SHIP REPAIR Provisions and Clauses 1371.118...

2010-10-01

53

48 CFR 1371.118 - Changes-ship repair.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Changes-ship repair. 1371.118 Section 1371.118 Federal...DEPARTMENT SUPPLEMENTAL REGULATIONS ACQUISITIONS INVOLVING SHIP CONSTRUCTION AND SHIP REPAIR Provisions and Clauses 1371.118...

2011-10-01

54

Titanium(IV) oxide photocatalysts with palladium  

SciTech Connect

Samples of palladium decomposed onto TiO[sub 2] particles were prepared by two methods: the dispersion of a PdCl[sub 2] solution followed by thermal decomposition, and the photodecomposition of PdCl[sub 2]. The addition of palladium to all samples increased their photocatalytic activity toward the degradation of 1,4-dichlorobenzene. This increase was optimized and compared for these two preparative methods. Palladium was also decomposed onto TiO[sub 2] thin films by the photodecomposition of PdCl[sub 2]. The addition of palladium to the films increased their photocatalytic activity toward the degradation of salicylic acid. 35 refs., 4 figs., 4 tabs.

Papp, J.; Shen, H.S.; Kershaw, R.; Dwight, K.; Wold, A. (Brown Univ., Providence, RI (United States))

1993-03-01

55

20 CFR 632.118 - Nepotism.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN EMPLOYMENT AND TRAINING PROGRAMS...118 Nepotism. (a) No Native American grantee, subgrantee, contractor...administrative capacity by the Native American grantee, subgrantee or...

2011-04-01

56

20 CFR 632.118 - Nepotism.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN EMPLOYMENT AND TRAINING PROGRAMS...118 Nepotism. (a) No Native American grantee, subgrantee, contractor...administrative capacity by the Native American grantee, subgrantee or...

2010-04-01

57

20 CFR 632.118 - Nepotism.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN EMPLOYMENT AND TRAINING PROGRAMS...118 Nepotism. (a) No Native American grantee, subgrantee, contractor...administrative capacity by the Native American grantee, subgrantee or...

2012-04-01

58

7 CFR 1260.118 - Cattle.  

Code of Federal Regulations, 2012 CFR

...MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE BEEF PROMOTION AND RESEARCH Beef Promotion and Research Order Definitions § 1260.118 Cattle. Cattle means live domesticated...

2012-01-01

59

7 CFR 1260.118 - Cattle.  

...MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE BEEF PROMOTION AND RESEARCH Beef Promotion and Research Order Definitions § 1260.118 Cattle. Cattle means live domesticated...

2014-01-01

60

7 CFR 1260.118 - Cattle.  

Code of Federal Regulations, 2011 CFR

...MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE BEEF PROMOTION AND RESEARCH Beef Promotion and Research Order Definitions § 1260.118 Cattle. Cattle means live domesticated...

2011-01-01

61

7 CFR 1260.118 - Cattle.  

Code of Federal Regulations, 2013 CFR

...MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE BEEF PROMOTION AND RESEARCH Beef Promotion and Research Order Definitions § 1260.118 Cattle. Cattle means live domesticated...

2013-01-01

62

Dasycladus ramosus, WNC2005-118  

NSDL National Science Digital Library

WNC2005-118, Dasycladus ramosus Chamberlain, intertidal, Jesser Point, Sodwana Bay, Kwazulu-Natal, South Africa, collection SA05-070, 18 Aug 2005, Coll: Brooke Stuercke, Det: B Stuercke & DW Freshwater, voucher for Fritz's study 1 of 2

Freshwater, Wilson

2008-03-07

63

29 CFR 1915.118 - Tables.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF LABOR (CONTINUED) OCCUPATIONAL SAFETY AND HEALTH STANDARDS FOR SHIPYARD EMPLOYMENT Gear and Equipment for Rigging and Materials Handling § 1915.118 Tables. The provisions of this section apply to ship repairing, shipbuilding...

2012-07-01

64

9 CFR 118.1 - Administrative detention.  

Code of Federal Regulations, 2013 CFR

... Section 118.1 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE VIRUSES, SERUMS, TOXINS, AND ANALOGOUS PRODUCTS; ORGANISMS AND VECTORS DETENTION; SEIZURE AND CONDEMNATION §...

2013-01-01

65

7 CFR 1280.118 - Promotion.  

Code of Federal Regulations, 2010 CFR

...AND INFORMATION ORDER Lamb Promotion, Research, and Information...Definitions § 1280.118 Promotion. Promotion means any action, including...with emphasis on new marketing strategies, to present a favorable...

2010-01-01

66

7 CFR 1150.118 - Marketing.  

Code of Federal Regulations, 2010 CFR

...Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Milk), DEPARTMENT...PROMOTION PROGRAM Dairy Promotion and Research Order Definitions § 1150.118 Marketing. Marketing means the sale or...

2010-01-01

67

45 CFR 400.118 - Case planning.  

Code of Federal Regulations, 2011 CFR

...RESETTLEMENT, ADMINISTRATION FOR CHILDREN AND FAMILIES, DEPARTMENT...RESETTLEMENT PROGRAM Child Welfare Services § 400.118...appropriate plan for the care and supervision of...minor, to ensure that the child is placed in a...

2011-10-01

68

45 CFR 400.118 - Case planning.  

Code of Federal Regulations, 2013 CFR

...RESETTLEMENT, ADMINISTRATION FOR CHILDREN AND FAMILIES, DEPARTMENT...RESETTLEMENT PROGRAM Child Welfare Services § 400.118...appropriate plan for the care and supervision of...minor, to ensure that the child is placed in a...

2013-10-01

69

45 CFR 400.118 - Case planning.  

Code of Federal Regulations, 2012 CFR

...RESETTLEMENT, ADMINISTRATION FOR CHILDREN AND FAMILIES, DEPARTMENT...RESETTLEMENT PROGRAM Child Welfare Services § 400.118...appropriate plan for the care and supervision of...minor, to ensure that the child is placed in a...

2012-10-01

70

Palladium - A New Inhibitor of Cellulase Activities  

Microsoft Academic Search

Palladium complexes have been shown to strongly inhibit cellobiohydrolase I (CBH I) and endoglucanase II (EG II), two cellulases produced by Trichoderma reesei. Also inhibited were total cellulase (Avicelase) and ?-glucosidase (cellobiase) activities. The catalytic domain of CBH II, the second most abundant component of this cellulase, appeared less susceptible to inhibition by palladium. The inhibition was irreversible and could

M. D. Shultz; J. P. Lassig; M. G. Gooch; B. R. Evans; J. Woodward

1995-01-01

71

Small palladium islands embedded in palladium–tungsten bimetallic nanoparticles form catalytic hotspots for oxygen reduction  

NASA Astrophysics Data System (ADS)

The sluggish kinetics of the oxygen reduction reaction at the cathode side of proton exchange membrane fuel cells is one major technical challenge for realizing sustainable solutions for the transportation sector. Finding efficient yet cheap electrocatalysts to speed up this reaction therefore motivates researchers all over the world. Here we demonstrate an efficient synthesis of palladium–tungsten bimetallic nanoparticles supported on ordered mesoporous carbon. Despite a very low percentage of noble metal (palladium:tungsten=1:8), the hybrid catalyst material exhibits a performance equal to commercial 60% platinum/Vulcan for the oxygen reduction process. The high catalytic efficiency is explained by the formation of small palladium islands embedded at the surface of the palladium–tungsten bimetallic nanoparticles, generating catalytic hotspots. The palladium islands are ~1?nm in diameter, and contain 10–20 palladium atoms that are segregated at the surface. Our results may provide insight into the formation, stabilization and performance of bimetallic nanoparticles for catalytic reactions.

Hu, Guangzhi; Nitze, Florian; Gracia-Espino, Eduardo; Ma, Jingyuan; Barzegar, Hamid Reza; Sharifi, Tiva; Jia, Xueen; Shchukarev, Andrey; Lu, Lu; Ma, Chuansheng; Yang, Guang; Wågberg, Thomas

2014-10-01

72

40 CFR 745.118 - Enforcement.  

Code of Federal Regulations, 2011 CFR

40 Protection of Environment 31 2011-07-01 2011-07-01...Section 745.118 Protection of Environment ENVIRONMENTAL PROTECTION...TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION...STRUCTURES Disclosure of Known Lead-Based Paint and/or...

2011-07-01

73

40 CFR 745.118 - Enforcement.  

Code of Federal Regulations, 2012 CFR

40 Protection of Environment 32 2012-07-01 2012-07-01...Section 745.118 Protection of Environment ENVIRONMENTAL PROTECTION...TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION...STRUCTURES Disclosure of Known Lead-Based Paint and/or...

2012-07-01

74

40 CFR 745.118 - Enforcement.  

Code of Federal Regulations, 2010 CFR

40 Protection of Environment 30 2010-07-01 2010-07-01...Section 745.118 Protection of Environment ENVIRONMENTAL PROTECTION...TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION...STRUCTURES Disclosure of Known Lead-Based Paint and/or...

2010-07-01

75

40 CFR 745.118 - Enforcement.  

Code of Federal Regulations, 2013 CFR

40 Protection of Environment 32 2013-07-01 2013-07-01...Section 745.118 Protection of Environment ENVIRONMENTAL PROTECTION...TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION...STRUCTURES Disclosure of Known Lead-Based Paint and/or...

2013-07-01

76

46 CFR 118.400 - Where required.  

Code of Federal Regulations, 2012 CFR

...combustion engine of more than 37.3 kW (50 hp); and (3) A space containing an oil fired boiler. (d) All griddles, broilers, and deep fat fryers must be fitted with a grease extraction hood that complies with § 118.425 of this part. (e)...

2012-10-01

77

46 CFR 118.400 - Where required.  

Code of Federal Regulations, 2011 CFR

...combustion engine of more than 37.3 kW (50 hp); and (3) A space containing an oil fired boiler. (d) All griddles, broilers, and deep fat fryers must be fitted with a grease extraction hood that complies with § 118.425 of this part. (e)...

2011-10-01

78

Assembly Bill No. 118 CHAPTER 750  

E-print Network

the Alternative and Renewable Fuel and Vehicle Technology Fund (Alternative Fund), and would require the Energy of State October 14, 2007.] legislative counsel's digest AB 118, Nunez. Alternative fuels and vehicle for the control of air pollution from vehicular and nonvehicular sources. Existing law generally designates

79

Palladium(0)-Catalyzed Arylative Dearomatization of Phenols  

E-print Network

The palladium-catalyzed arylative dearomatization of phenols to yield spirocyclohexadienone products in good to excellent yields has been developed. Preliminary results demonstrate that the formation of the spirocyclic ...

Rousseaux, Sophie

80

Palladium catalyzed 1,8-conjugate addition to heptafulvene via bis-?-allyl palladium complexes.  

PubMed

The palladium catalyzed 1,8-conjugate addition of heptafulvene, an antiaromatic conjugated 8?-electron system, is discussed. The method is utilized for the concise synthesis of bis-functionalized cycloheptatriene (CHT) derivatives. This is the first report on the palladium catalyzed bisfunctionalization of a cyclic cross conjugated system. PMID:21899322

George, Sholly Clair; Thulasi, Sreeja; Anas, S; Radhakrishnan, K V; Yamamoto, Yoshinori

2011-10-01

81

50 CFR 216.118 - Renewal of Letters of Authorization.  

Code of Federal Regulations, 2010 CFR

50 Wildlife and Fisheries 7 2010-10-01...118 Section 216.118 Wildlife and Fisheries NATIONAL...described work, mitigation or monitoring undertaken during the upcoming...Timely receipt of the monitoring reports required...

2010-10-01

82

22 CFR 11.8 - Travel expenses of candidates.  

...1 2014-04-01 2014-04-01 false Travel expenses of candidates. 11.8 Section 11...APPOINTMENT OF FOREIGN SERVICE OFFICERS § 11.8 Travel expenses of candidates. The travel and other personal expenses of...

2014-04-01

83

14 CFR 1245.118 - Record of decisions.  

Code of Federal Regulations, 2013 CFR

...Section 1245.118 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PATENTS AND OTHER INTELLECTUAL PROPERTY RIGHTS Patent Waiver Regulations § 1245.118 Record of decisions. The findings of fact and...

2013-01-01

84

14 CFR 1245.118 - Record of decisions.  

Code of Federal Regulations, 2012 CFR

...Section 1245.118 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PATENTS AND OTHER INTELLECTUAL PROPERTY RIGHTS Patent Waiver Regulations § 1245.118 Record of decisions. The findings of fact and...

2012-01-01

85

14 CFR 1245.118 - Record of decisions.  

Code of Federal Regulations, 2010 CFR

...Section 1245.118 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PATENTS AND OTHER INTELLECTUAL PROPERTY RIGHTS Patent Waiver Regulations § 1245.118 Record of decisions. The findings of fact and...

2010-01-01

86

14 CFR 1245.118 - Record of decisions.  

...Section 1245.118 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PATENTS AND OTHER INTELLECTUAL PROPERTY RIGHTS Patent Waiver Regulations § 1245.118 Record of decisions. The findings of fact and...

2014-01-01

87

14 CFR 1245.118 - Record of decisions.  

Code of Federal Regulations, 2011 CFR

...Section 1245.118 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION PATENTS AND OTHER INTELLECTUAL PROPERTY RIGHTS Patent Waiver Regulations § 1245.118 Record of decisions. The findings of fact and...

2011-01-01

88

33 CFR 118.100 - Retroreflective panels on bridge piers.  

...2014-07-01 false Retroreflective panels on bridge piers. 118.100 Section...SIGNALS § 118.100 Retroreflective panels on bridge piers. The District Commander...intensity red or green retroreflective panels when the District Commander finds it...

2014-07-01

89

19 CFR 12.118 - Toxic Substances Control Act.  

Code of Federal Regulations, 2012 CFR

... 2012-04-01 false Toxic Substances Control Act. 12.118 Section...CLASSES OF MERCHANDISE Chemical Substances in Bulk and As Part of Mixtures and Articles § 12.118 Toxic Substances Control Act. The...

2012-04-01

90

19 CFR 12.118 - Toxic Substances Control Act.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Toxic Substances Control Act. 12.118 Section...CLASSES OF MERCHANDISE Chemical Substances in Bulk and As Part of Mixtures and Articles § 12.118 Toxic Substances Control Act. The...

2010-04-01

91

19 CFR 12.118 - Toxic Substances Control Act.  

... 2014-04-01 false Toxic Substances Control Act. 12.118 Section...CLASSES OF MERCHANDISE Chemical Substances in Bulk and As Part of Mixtures and Articles § 12.118 Toxic Substances Control Act. The...

2014-04-01

92

19 CFR 12.118 - Toxic Substances Control Act.  

Code of Federal Regulations, 2011 CFR

... 2011-04-01 false Toxic Substances Control Act. 12.118 Section...CLASSES OF MERCHANDISE Chemical Substances in Bulk and As Part of Mixtures and Articles § 12.118 Toxic Substances Control Act. The...

2011-04-01

93

19 CFR 12.118 - Toxic Substances Control Act.  

Code of Federal Regulations, 2013 CFR

... 2013-04-01 false Toxic Substances Control Act. 12.118 Section...CLASSES OF MERCHANDISE Chemical Substances in Bulk and As Part of Mixtures and Articles § 12.118 Toxic Substances Control Act. The...

2013-04-01

94

Anticancer drug FL118 is more than a survivin inhibitor: where is the Achilles' heel of cancer?  

PubMed Central

Can a solution be found that overcomes all chemotherapy and/or radiation resistance resulting from different genetic and epigenetic alternations in various cancer types? The answer is likely NO. However, there are two ways that may be followed to approach this goal. One way is through the use of poly-therapies that target multiple mechanisms to kill cancer cells, which is the current state of the art. This approach raises issues of high costs and/or toxic limitations, since the toxicities of each agent are often additive. This poly-pharmacy approach has not proven to be a major success, although it has proven to be superior to most current mono-pharmacy approaches. The other way to approach the goal is to find a single anticancer drug that targets multiple different treatment resistant mechanisms. In this regard, a small chemical molecule (FL118) was recently discovered by serendipity during targeted discovery of anticancer drugs using the survivin gene as a target and biomarker. FL118 was found to not only inhibit multiple antiapoptotic proteins (survivin, XIAP, cIAP2) in the inhibitor of apoptosis (IAP) family, but to also inhibit the antiapoptotic protein Mcl-1 in the Bcl-2 family, while inducing the pro-apoptotic proteins Bax and Bim expression. Importantly, inhibition of these target genes and of tumor growth by FL118 is independent of p53 status (wild type, mutant or null), although mechanisms of action may be distinct among cells with different p53 status. Therefore, FL118 may effectively control cancer that loses functional p53, in which most DNA damage drugs (if not all) show a marked lack of efficiency. Recent studies further revealed that the superior anticancer activity of FL118 is highly dependent on its primary structure and steric configuration, suggesting that FL118 may be a promising drug platform for generating novel derivatives based on its core structure. Intriguingly, although FL118 has structural similarity to irinotecan and topotecan, two FDA-approved topoisomerase 1 (Top1) inhibitors for cancer treatment, cancer cells with Top1 mutations shows little contributions of treatment resistance to FL118 antitumor activity, while strikingly increasing irinotecan and topotecan resistance. Furthermore, both irinotecan and topotecan are the efflux pump ABCG2 substrates; cancer cells with high expression of ABCG2 showed strong irinotecan and topotecan resistance. In contrast, FL118 is not an ABCG2 substrate; ABCG2 overexpression in cancer cells does not show resistance to FL118 treatment. Current evidence suggests that future studies may unravel more unexpected mechanisms of action for this unique small molecule FL118. PMID:24959385

Li, Fengzhi

2014-01-01

95

27 CFR 9.118 - Ben Lomond Mountain.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Ben Lomond Mountain. 9.118 Section 9.118 Alcohol...Viticultural Areas § 9.118 Ben Lomond Mountain. (a) Name. The name of the viticultural...described in this section is “Ben Lomond Mountain.” (b) Approved maps. The...

2010-04-01

96

19 CFR 118.2 - Establishment of a CES.  

...2014-04-01 false Establishment of a CES. 118.2 Section 118.2 Customs...Provisions § 118.2 Establishment of a CES. When a port director makes a preliminary determination that a new CES should be established, or when the...

2014-04-01

97

19 CFR 118.2 - Establishment of a CES.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Establishment of a CES. 118.2 Section 118.2 Customs...Provisions § 118.2 Establishment of a CES. When a port director makes a preliminary determination that a new CES should be established, or when the...

2012-04-01

98

19 CFR 118.2 - Establishment of a CES.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Establishment of a CES. 118.2 Section 118.2 Customs...Provisions § 118.2 Establishment of a CES. When a port director makes a preliminary determination that a new CES should be established, or when the...

2013-04-01

99

19 CFR 118.4 - Responsibilities of a CES operator.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Responsibilities of a CES operator. 118.4 Section 118.4...Provisions § 118.4 Responsibilities of a CES operator. By signing the agreement and commencing operation of a CES, an operator agrees to: (a)...

2012-04-01

100

19 CFR 118.4 - Responsibilities of a CES operator.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Responsibilities of a CES operator. 118.4 Section 118.4...Provisions § 118.4 Responsibilities of a CES operator. By signing the agreement and commencing operation of a CES, an operator agrees to: (a)...

2011-04-01

101

19 CFR 118.4 - Responsibilities of a CES operator.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Responsibilities of a CES operator. 118.4 Section 118.4...Provisions § 118.4 Responsibilities of a CES operator. By signing the agreement and commencing operation of a CES, an operator agrees to: (a)...

2010-04-01

102

19 CFR 118.4 - Responsibilities of a CES operator.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Responsibilities of a CES operator. 118.4 Section 118.4...Provisions § 118.4 Responsibilities of a CES operator. By signing the agreement and commencing operation of a CES, an operator agrees to: (a)...

2013-04-01

103

19 CFR 118.2 - Establishment of a CES.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Establishment of a CES. 118.2 Section 118.2 Customs...Provisions § 118.2 Establishment of a CES. When a port director makes a preliminary determination that a new CES should be established, or when the...

2011-04-01

104

19 CFR 118.4 - Responsibilities of a CES operator.  

...2014-04-01 false Responsibilities of a CES operator. 118.4 Section 118.4...Provisions § 118.4 Responsibilities of a CES operator. By signing the agreement and commencing operation of a CES, an operator agrees to: (a)...

2014-04-01

105

19 CFR 118.2 - Establishment of a CES.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Establishment of a CES. 118.2 Section 118.2 Customs...Provisions § 118.2 Establishment of a CES. When a port director makes a preliminary determination that a new CES should be established, or when the...

2010-04-01

106

33 CFR 118.80 - Lights on bascule bridges.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Lights on bascule bridges. 118.80 Section 118.80 Navigation and Navigable...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.80 Lights...

2012-07-01

107

33 CFR 118.80 - Lights on bascule bridges.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Lights on bascule bridges. 118.80 Section 118.80 Navigation and Navigable...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.80 Lights...

2013-07-01

108

ENCAPSULATION OF PALLADIUM IN POROUS WALL HOLLOW GLASS MICROSPHERES  

SciTech Connect

A new encapsulation method was investigated in an attempt to develop an improved palladium packing material for hydrogen isotope separation. Porous wall hollow glass microspheres (PWHGMs) were produced by using a flame former, heat treating and acid leaching. The PWHGMs were then filled with palladium salt using a soak-and-dry process. The palladium salt was reduced at high temperature to leave palladium inside the microspheres.

Heung, L; George Wicks, G; Ray Schumacher, R

2008-04-09

109

Measurement of palladium crust thickness on catalyst by EPMA  

NASA Astrophysics Data System (ADS)

Selective hydrogenation is a key process in petrochemistry to obtain good feedstock for polymers synthesis. Common catalysts for this process consist in metallic palladium deposited with an eggshell distribution on porous alumina. For this system, the catalytic activity is known to be in strong relation with the thickness of the palladium crust. Typical catalyst consists of 2 - 4 mm diameter spherical beads having a 200 - 400 ?m thick palladium crust and a total palladium amount of about 0.3 to 0.5 wt%. The palladium distribution in the catalyst bead can be easily characterized by electron probe microanalysis (EPMA) using polished cross-sections of the beads trough their diameter. By measuring the local concentration of palladium on several points along the bead diameter we obtain the distribution profile of palladium in the bead. Two strategies are proposed to measure this palladium crust thickness by EPMA. First the crust thickness is defined by the distance to the catalyst bead surface containing a fixed amount of total palladium (for example 95 % or 98 %). Second, the palladium profile is modelled by a parameterized analytical function from which a crust thickness can be extracted. Catalytic tests on four samples having different palladium crust thicknesses confirm the strong relation between activity and crust thickness. However the crust thickness containing 98 % of the palladium content shows the best correlation with activity.

Sorbier, L.; Gay, A.-S.; Fécant, A.; Moreaud, M.; Brodusch, N.

2012-03-01

110

Cross Section Limits for the $^{208}$Pb($^{86}$Kr,n)$^{293}$118 Reaction  

E-print Network

In April-May, 2001, the previously reported experiment to synthesize element 118 using the $^{208}$Pb($^{86}$Kr,n)$^{293}$118 reaction was repeated. No events corresponding to the synthesis of element 118 were observed with a total beam dose of 2.6 x 10$^{18}$ ions. The simple upper limit cross sections (1 event) were 0.9 and 0.6 pb for evaporation residue magnetic rigidities of 2.00 $T m$ and 2.12 $T m$, respectively. A more detailed cross section calculation, accounting for an assumed narrow excitation function, the energy loss of the beam in traversing the target and the uncertainty in the magnetic rigidity of the Z=118 recoils is also presented. Re-analysis of the primary data files from the 1999 experiment showed the reported element 118 events are not in the original data. The current results put constraints on the production cross section for synthesis of very heavy nuclei in cold fusion reactions.

K. E. Gregorich; T. N. Ginter; W. Loveland; D. Peterson; J. B. Patin; C. M. Folden III; D. C. Hoffman; D. M. Lee; H. Nitsche; J. P. Omtvedt; L. A. Omtvedt; L. Stavsetra; R. Sudowe; P. A. Wilk; P. M. Zielinski; K. Aleklett

2002-09-04

111

DOI: 10.1126/science.276.5309.118 , 118 (1997);276Science  

E-print Network

During Polarized Morphogenesis Bni1p, a Yeast Formin Linking Cdc42p and the Actin www are available online at http://www.sciencemag.org/cgi/content/full/276/5309/118 version of this article at: including high-resolution figures, can be found in the onlineUpdated information and services, http://www.sciencemag.org/cgi/content

Boone, Charlie

112

Efficient palladium-catalyzed aminocarbonylation of aryl iodides using palladium nanoparticles dispersed on siliceous mesocellular foam.  

PubMed

A highly dispersed nanopalladium catalyst supported on mesocellular foam (MCF), was successfully used in the heterogeneous catalysis of aminocarbonylation reactions. During the preliminary evaluation of this catalyst it was discovered that the supported palladium nanoparticles exhibited a "release and catch" effect, meaning that a minor amount of the heterogeneous palladium became soluble and catalyzed the reaction, after which it re-deposited onto the support. PMID:24687938

Tinnis, Fredrik; Verho, Oscar; Gustafson, Karl P J; Tai, Cheuk-Wai; Bäckvall, Jan-E; Adolfsson, Hans

2014-05-12

113

Small palladium islands embedded in palladium-tungsten bimetallic nanoparticles form catalytic hotspots for oxygen reduction.  

PubMed

The sluggish kinetics of the oxygen reduction reaction at the cathode side of proton exchange membrane fuel cells is one major technical challenge for realizing sustainable solutions for the transportation sector. Finding efficient yet cheap electrocatalysts to speed up this reaction therefore motivates researchers all over the world. Here we demonstrate an efficient synthesis of palladium-tungsten bimetallic nanoparticles supported on ordered mesoporous carbon. Despite a very low percentage of noble metal (palladium:tungsten=1:8), the hybrid catalyst material exhibits a performance equal to commercial 60% platinum/Vulcan for the oxygen reduction process. The high catalytic efficiency is explained by the formation of small palladium islands embedded at the surface of the palladium-tungsten bimetallic nanoparticles, generating catalytic hotspots. The palladium islands are ~1?nm in diameter, and contain 10-20 palladium atoms that are segregated at the surface. Our results may provide insight into the formation, stabilization and performance of bimetallic nanoparticles for catalytic reactions. PMID:25308245

Hu, Guangzhi; Nitze, Florian; Gracia-Espino, Eduardo; Ma, Jingyuan; Barzegar, Hamid Reza; Sharifi, Tiva; Jia, Xueen; Shchukarev, Andrey; Lu, Lu; Ma, Chuansheng; Yang, Guang; Wågberg, Thomas

2014-01-01

114

Viral-templated Palladium Nanocatalysts  

NASA Astrophysics Data System (ADS)

Despite recent progress on nanocatalysis, there exist several critical challenges in simple and readily controllable nanocatalyst synthesis including the unpredictable particle growth, deactivation of catalytic activity, cumbersome catalyst recovery and lack of in-situ reaction monitoring. In this dissertation, two novel approaches are presented for the fabrication of viral-templated palladium (Pd) nanocatalysts, and their catalytic activities for dichromate reduction reaction and Suzuki Coupling reaction were thoroughly studied. In the first approach, viral template based bottom-up assembly is employed for the Pd nanocatalyst synthesis in a chip-based format. Specifically, genetically displayed cysteine residues on each coat protein of Tobacco Mosaic Virus (TMV) templates provide precisely spaced thiol functionalities for readily controllable surface assembly and enhanced formation of catalytically active Pd nanoparticles. Catalysts with the chip-based format allow for simple separation and in-situ monitoring of the reaction extent. Thorough examination of synthesis-structure-activity relationship of Pd nanoparticles formed on surface-assembled viral templates shows that Pd nanoparticle size, catalyst loading density and catalytic activity of viral-templated Pd nanocatalysts can be readily controlled simply by tuning the synthesis conditions. The viral-templated Pd nanocatalysts with optimized synthesis conditions are shown to have higher catalytic activity per unit Pd mass than the commercial Pd/C catalysts. Furthermore, tunable and selective surface assembly of TMV biotemplates is exploited to control the loading density and location of Pd nanocatalysts on solid substrates via preferential electroless deposition. In addition, the catalytic activities of surface-assembled TMV-templated Pd nanocatalysts were also investigated for the ligand-free Suzuki Coupling reaction under mild reaction conditions. The chip-based format enables simple catalyst separation and reuse as well as facile product recovery. Reaction condition studies show that the solvent ratio played an important role in the selectivity of the Suzuki reaction, and that a higher water/acetonitrile ratio significantly facilitated the cross-coupling pathway. Meanwhile, in-depth characterizations including Atomic Force Microscopy (AFM), Grazing Incidence Small Angle X-ray Scattering (GISAXS), Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and X-ray Photoelectron Spectroscopy (XPS) were carried out for these chip-based viral-templated Pd nanocatalysts. In the second approach, catalytically active TMV-templated Pd nanoparticles are encapsulated in readily exploited polymeric microparticle formats. Specifically, small (1˜2 nm), uniform and highly crystalline palladium (Pd) nanoparticles are spontaneously formed along (TMV) biotemplates without external reducing agents. The as-prepared Pd-TMV complexes are integrated into the hybrid poly(ethylene glycol)(PEG)-based microparticles via replica molding (RM) technique in a simple, robust and highly reproducible manner. The Pd-TMV complex structure was characterized by Transmission Electron Microscopy (TEM). The hybrid Pd-TMV-PEG microparticles are examined to have high catalytic activity, recyclability and stability through dichromate reduction. Combined these findings represent a significant step toward simple, robust, scalable synthesis and fabrication of efficient biotemplate-supported Pd nanocatalysts in readily deployable polymeric formats with high capacity in a well-controlled manner. These two simple, robust and readily controllable approaches for the fabrication of viral-templated Pd nanocatalysts, in both chip-based and hydrogel-encapsulated formats, can be readily extended to a variety of other nano-bio hybrid material synthesis in other catalytic reaction systems.

Yang, Cuixian

115

7 CFR 1221.118 - Refund escrow accounts.  

Code of Federal Regulations, 2010 CFR

...ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE SORGHUM PROMOTION, RESEARCH, AND INFORMATION ORDER Sorghum Promotion, Research, and Information Order Sorghum Promotion, Research, and Information Board § 1221.118...

2010-01-01

116

16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”  

Code of Federal Regulations, 2013 CFR

... Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium...deceptive to use the words “platinum,” “iridium,” “palladium,” “ruthenium...Platinum Group Metals (PGM) are Platinum, Iridium, Palladium, Ruthenium, Rhodium,...

2013-01-01

117

16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”  

Code of Federal Regulations, 2011 CFR

... Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium...deceptive to use the words “platinum,” “iridium,” “palladium,” “ruthenium...Platinum Group Metals (PGM) are Platinum, Iridium, Palladium, Ruthenium, Rhodium,...

2011-01-01

118

16 CFR 23.7 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”  

Code of Federal Regulations, 2012 CFR

... Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium...deceptive to use the words “platinum,” “iridium,” “palladium,” “ruthenium...Platinum Group Metals (PGM) are Platinum, Iridium, Palladium, Ruthenium, Rhodium,...

2012-01-01

119

Hydrogen and Palladium Foil: Two Classroom Demonstrations  

ERIC Educational Resources Information Center

In these two classroom demonstrations, students observe the reaction between H[subscript 2] gas and Pd foil. In the first demonstration, hydrogen and palladium combine within one minute at 1 atm and room temperature to yield the non-stoichiometric, interstitial hydride with formula close to the maximum known value, PdH[subscript 0.7]. In the…

Klotz, Elsbeth; Mattson, Bruce

2009-01-01

120

Combine palladium with iron for enhanced dechlorination  

SciTech Connect

Research Corporation Technologies (RCT; Tucson, Arizona) is completing bench-scale testing of a new groundwater-treatment process that uses particles of palladium-coated iron to dechlorinate organic compounds. The palladized-iron process, developed by a research team at the University of Arizona, dechlorinates low-molecular-weight hydrocarbons by converting the chlorinated organics to chloride ions and either methane or ethane gas. A three-month test of an above-ground treatment unit is scheduled to begin in September. The key to the new process is the palladium. When elemental iron is immersed in water, it oxidizes and releases electrons, which create a reducing environment. This reducing environment breaks down chlorinated and fluorinated organic compounds. Unfortunately, a layer of metal oxide (rust) forms on the iron surface. This layer ultimately impedes the flow of electrons into the water and makes the reduction process slow and inefficient. To overcome this, RCT deposits a small amount (0.05 wt%) of palladium as discrete islands on the iron particles. This palladium prevents rust from coating the iron but does not impede the steady flow of the electrons needed to sustain a reducing environment.

NONE

1995-07-01

121

Recent Progress in Polymeric Palladium Catalysts for Organic Synthesis  

Microsoft Academic Search

Recent progress in the design, preparation, and application of polymer-supported palladium complexes is reviewed. In particular, the preparation of various supported palladium-phosphine complexes used in a variety of carbon–carbon bond forming reactions such as the Heck reaction, the Suzuki–Miyaura coupling, and -allylic substitution is discussed. Immobilization of the palladium complexes has often been achieved by anchoring phosphorus-based ligands on functionalized

Yasuhiro Uozumi

122

The preparation of palladium for cold fusion experiments  

Microsoft Academic Search

Techniques have been established to prepare palladium specimens for cold fusion experiments using an ultra-high-vacuum, allmetal, high-temperature furnace to melt palladium metal in high purity alumina molds having a test tube shape. To date 6-mm and 15-mm cylinders have been fabricated, the latter being used to fabricate a sphere 12.5-mm in diameter. Techniques and facilities used for palladium-hydrogen isotope pressure-volume-temperature

G. L. Powell; J. S. Bullock; R. L. Hallman; P. J. Horton; D. P. Hutchinson

1990-01-01

123

Process for recovery of palladium from nuclear fuel reprocessing wastes  

DOEpatents

Palladium is selectively removed from spent nuclear fuel reprocessing waste by adding sugar to a strong nitric acid solution of the waste to partially denitrate the solution and cause formation of an insoluble palladium compound. The process includes the steps of: (a) adjusting the nitric acid content of the starting solution to about 10 M; (b) adding 50% sucrose solution in an amount sufficient to effect the precipitation of the palladium compound; (c) heating the solution at reflux temperature until precipitation is complete; and (d) centrifuging the solution to separate the precipitated palladium compound from the supernatant liquid.

Campbell, D.O.; Buxton, S.R.

1980-06-16

124

Studies of size selected palladium and iridium model catalysts.  

E-print Network

??This dissertation describes size-dependent investigations of supported palladium and iridium clusters, used as model catalysts for carbon monoxide oxidation and hydrazine decomposition reactions. Chapter 1… (more)

Kaden, William E

2010-01-01

125

Process for recovery of palladium from nuclear fuel reprocessing wastes  

DOEpatents

Palladium is selectively removed from spent nuclear fuel reprocessing waste by adding sugar to a strong nitric acid solution of the waste to partially denitrate the solution and cause formation of an insoluble palladium compound. The process includes the steps of: (a) adjusting the nitric acid content of the starting solution to about 10 M, (b) adding 50% sucrose solution in an amount sufficient to effect the precipitation of the palladium compound, (c) heating the solution at reflux temperature until precipitation is complete, and (d) centrifuging the solution to separate the precipitated palladium compound from the supernatant liquid.

Campbell, David O. (Oak Ridge, TN); Buxton, Samuel R. (Wartburg, TN)

1981-01-01

126

The Palladium-Catalyzed Trifluoromethylation of Vinyl Sulfonates  

E-print Network

A method for the palladium-catalyzed trifluoromethylation of cyclohexenyl sulfonates has been developed. Various cyclohexenyl triflates and nonaflates underwent trifluoromethylation under mild reaction conditions using a ...

Cho, Eun Jin

127

Synthesis of superheavy nuclei with Z =118 in hot fusion reactions  

NASA Astrophysics Data System (ADS)

The evaporation residue (ER) cross sections for producing superheavy nuclei with charge number 118 in some 48Ca-induced reactions are studied theoretically with the dinuclear system model with dynamical potential energy surface (DNS-DyPES model) for the experiment, which is aimed to produce the isotopes of element Z =118. The experiment is under way at the Flerov Laboratory of the Joint Institute for Nuclear Research in Dubna, Russia. The calculated ER cross sections for 48Ca + 249Cf are found to be in good agreement with the experimental results. The excitation functions for 48Ca + 250,251,252Cf are calculated and predicted, and the dependence of the residue cross sections for producing 293,294,295,296,297118 on the bombarding energies is also calculated for an isotopic composition of the Cf target. The possibilities for producing element 118 with other projectile-target combinations such as 50Ti + 248Cm and 54Cr + 244Pu at different mass asymmetries of entrance channels are also investigated.

Wang, Nan; Zhao, En-Guang; Scheid, Werner

2014-03-01

128

Palladium-catalyzed amination of aryl nonaflates.  

PubMed

The first detailed study of the palladium-catalyzed amination of aryl nonaflates is reported. Use of ligands 2-4 and 6 allows for the catalytic amination of electron-rich and -neutral aryl nonaflates with both primary and secondary amines. With use of Xantphos 5, the catalytic amination of a variety of functionalized aryl nonaflates resulted in excellent yields of anilines; even 2-carboxymethyl aryl nonaflate is effectively coupled with a primary alkylamine. Moderate yields were obtained when coupling halo-aryl nonaflates with a variety of amines, where in most cases the aryl nonaflate reacted in preference to the aryl halide. Overall, aryl nonaflates are an effective alternative to triflates in palladium-catalyzed C-N bond-forming processes due to their increased stability under the reaction conditions. PMID:14656080

Anderson, Kevin W; Mendez-Perez, Maria; Priego, Julian; Buchwald, Stephen L

2003-12-12

129

Dosimetric study of a new palladium seed  

Microsoft Academic Search

In this paper, the dosimetric parameters for a new palladium seed design: the InterSource103,11Furnished by IBt, Seneffe, Belgium. are presented as recommended by the AAPM in the TG-43 formalism. Measurements are made with LiF thermoluminescent dosimeters (size of 1mm3) in solid water phantoms WT1 to obtain the dose constant, the radial dose function and the anisotropy function. The TLD were

B Reniers; S Vynckier; P Scalliet

2002-01-01

130

Silver-Palladium Surfaces Inhibit Biofilm Formation?  

PubMed Central

Undesired biofilm formation is a major concern in many areas. In the present study, we investigated biofilm-inhibiting properties of a silver-palladium surface that kills bacteria by generating microelectric fields and electrochemical redox processes. For evaluation of the biofilm inhibition efficacy and study of the biofilm inhibition mechanism, the silver-sensitive Escherichia coli J53 and the silver-resistant E. coli J53[pMG101] strains were used as model organisms, and batch and flow chamber setups were used as model systems. In the case of the silver-sensitive strain, the silver-palladium surfaces killed the bacteria and prevented biofilm formation under conditions of low or high bacterial load. In the case of the silver-resistant strain, the silver-palladium surfaces killed surface-associated bacteria and prevented biofilm formation under conditions of low bacterial load, whereas under conditions of high bacterial load, biofilm formation occurred upon a layer of surface-associated dead bacteria. PMID:19151185

Chiang, Wen-Chi; Schroll, Casper; Hilbert, Lisbeth Rischel; M?ller, Per; Tolker-Nielsen, Tim

2009-01-01

131

Palladium-catalyzed oxidative carbonylation reactions.  

PubMed

Palladium-catalyzed coupling reactions have become a powerful tool for advanced organic synthesis. This type of reaction is of significant value for the preparation of pharmaceuticals, agrochemicals, as well as advanced materials. Both, academic as well as industrial laboratories continuously investigate new applications of the different methodologies. Clearly, this area constitutes one of the major topics in homogeneous catalysis and organic synthesis. Among the different palladium-catalyzed coupling reactions, several carbonylations have been developed and widely used in organic syntheses and are even applied in the pharmaceutical industry on ton-scale. Furthermore, methodologies such as the carbonylative Suzuki and Sonogashira reactions allow for the preparation of interesting building blocks, which can be easily refined further on. Although carbonylative coupling reactions of aryl halides have been well established, palladium-catalyzed oxidative carbonylation reactions are also interesting. Compared with the reactions of aryl halides, oxidative carbonylation reactions offer an interesting pathway. The oxidative addition step could be potentially avoided in oxidative reactions, but only few reviews exist in this area. In this Minireview, we summarize the recent development in the oxidative carbonylation reactions. PMID:23307763

Wu, Xiao-Feng; Neumann, Helfried; Beller, Matthias

2013-02-01

132

Palladium nanostructures from galvanic displacement as hydrogen peroxide sensor  

Microsoft Academic Search

Electroless plating of palladium on silicon has been developed, resulting in the formation of palladium films and nanoparticles. The deposition process has been monitored by atomic and Kelvin probe force microscopies (AFM\\/KPFM), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) in order to understand the deposition mechanism. A fabrication process is developed to yield a high density of Pd

Albert Gutes; Ian Laboriante; Carlo Carraro; Roya Maboudian

2010-01-01

133

38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2014-07-01

134

28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2014-07-01

135

7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-01-01

136

38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2011-07-01

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28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-07-01

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49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-10-01

139

7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-01-01

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15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2010-01-01

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49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-10-01

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28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-07-01

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15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2011-01-01

144

38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2010-07-01

145

19 CFR 118.23 - Appeal to the Assistant Commissioner; procedure; status of CES operations.  

...Assistant Commissioner; procedure; status of CES operations. 118.23 Section 118...EXAMINATION STATIONS Termination of a CES § 118.23 Appeal to the Assistant Commissioner; procedure; status of CES operations. (a) Appeal to the...

2014-04-01

146

19 CFR 118.23 - Appeal to the Assistant Commissioner; procedure; status of CES operations.  

Code of Federal Regulations, 2010 CFR

...Assistant Commissioner; procedure; status of CES operations. 118.23 Section 118...EXAMINATION STATIONS Termination of a CES § 118.23 Appeal to the Assistant Commissioner; procedure; status of CES operations. (a) Appeal to the...

2010-04-01

147

19 CFR 118.23 - Appeal to the Assistant Commissioner; procedure; status of CES operations.  

Code of Federal Regulations, 2012 CFR

...Assistant Commissioner; procedure; status of CES operations. 118.23 Section 118...EXAMINATION STATIONS Termination of a CES § 118.23 Appeal to the Assistant Commissioner; procedure; status of CES operations. (a) Appeal to the...

2012-04-01

148

19 CFR 118.23 - Appeal to the Assistant Commissioner; procedure; status of CES operations.  

Code of Federal Regulations, 2011 CFR

...Assistant Commissioner; procedure; status of CES operations. 118.23 Section 118...EXAMINATION STATIONS Termination of a CES § 118.23 Appeal to the Assistant Commissioner; procedure; status of CES operations. (a) Appeal to the...

2011-04-01

149

19 CFR 118.23 - Appeal to the Assistant Commissioner; procedure; status of CES operations.  

Code of Federal Regulations, 2013 CFR

...Assistant Commissioner; procedure; status of CES operations. 118.23 Section 118...EXAMINATION STATIONS Termination of a CES § 118.23 Appeal to the Assistant Commissioner; procedure; status of CES operations. (a) Appeal to the...

2013-04-01

150

7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-01-01

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49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-10-01

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7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2014-01-01

153

38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2013-07-01

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28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-07-01

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15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2014-01-01

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15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2012-01-01

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7 CFR 1c.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 1c.118 Section 1c.118...Secretary of Agriculture PROTECTION OF HUMAN SUBJECTS § 1c.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-01-01

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49 CFR 11.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 11.118 Section 11.118...Secretary of Transportation PROTECTION OF HUMAN SUBJECTS § 11.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-10-01

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28 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 46.118 Section 46.118...OF JUSTICE (CONTINUED) PROTECTION OF HUMAN SUBJECTS § 46.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-07-01

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15 CFR 27.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 27.118 Section 27.118...the Secretary of Commerce PROTECTION OF HUMAN SUBJECTS § 27.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2013-01-01

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38 CFR 16.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 16.118 Section 16.118...DEPARTMENT OF VETERANS AFFAIRS PROTECTION OF HUMAN SUBJECTS § 16.118 Applications and...lacking definite plans for involvement of human subjects. Certain types...

2012-07-01

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33 CFR 118.95 - Lights on structures not part of a bridge or approach structure.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Lights on structures not part of a bridge or approach structure. 118.95 Section 118.95...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.95 Lights...

2011-07-01

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33 CFR 118.95 - Lights on structures not part of a bridge or approach structure.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Lights on structures not part of a bridge or approach structure. 118.95 Section 118.95...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.95 Lights...

2012-07-01

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33 CFR 118.95 - Lights on structures not part of a bridge or approach structure.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Lights on structures not part of a bridge or approach structure. 118.95 Section 118.95...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.95 Lights...

2010-07-01

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33 CFR 118.95 - Lights on structures not part of a bridge or approach structure.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Lights on structures not part of a bridge or approach structure. 118.95 Section 118.95...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.95 Lights...

2013-07-01

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118. Historic American Buildings Survey, Donald W. Dickensheets, Photographer. April ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

118. Historic American Buildings Survey, Donald W. Dickensheets, Photographer. April 29, 1940. EAST TRANSEPT MURAL, 'CHILDHOOD OF VIRGIN MARY'. (NORTH ELEVATION) - San Xavier del Bac Mission, Mission Road, Tucson, Pima County, AZ

167

29 CFR 570.118 - Sixteen-year minimum.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR REGULATIONS CHILD LABOR REGULATIONS, ORDERS AND STATEMENTS...Statements of Interpretation of the Child Labor Provisions of the Fair Labor Standards...1938, as Amended Oppressive Child Labor § 570.118...

2010-07-01

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9 CFR 118.4 - Seizure and condemnation.  

Code of Federal Regulations, 2011 CFR

... Section 118.4 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE VIRUSES, SERUMS, TOXINS, AND ANALOGOUS PRODUCTS; ORGANISMS AND VECTORS DETENTION; SEIZURE AND CONDEMNATION §...

2011-01-01

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118. TUBING AT BACK SIDE OF PNEUMATIC SUPPLY PANEL IN ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

118. TUBING AT BACK SIDE OF PNEUMATIC SUPPLY PANEL IN CENTER OF VEHICLE MECHANICAL SYSTEMS ROOM (111), LSB (BLDG. 770) - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

170

118. Stage basement. View, facing south, of the south hydraulic ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

118. Stage basement. View, facing south, of the south hydraulic ram (type D) in the middle row. Photo was taken before the stage flooring was removed. - Auditorium Building, 430 South Michigan Avenue, Chicago, Cook County, IL

171

18 CFR 11.8 - Adjustment of annual charges.  

Code of Federal Regulations, 2013 CFR

...FEDERAL POWER ACT Charges for Costs of Administration, Use of Tribal Lands and Other Government Lands, and Use of Government Dams § 11.8 Adjustment of annual charges. All annual charges imposed under this subpart continue in effect as fixed...

2013-04-01

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18 CFR 11.8 - Adjustment of annual charges.  

...FEDERAL POWER ACT Charges for Costs of Administration, Use of Tribal Lands and Other Government Lands, and Use of Government Dams § 11.8 Adjustment of annual charges. All annual charges imposed under this subpart continue in effect as fixed...

2014-04-01

173

New supported palladium-chromium catalysts: characterization and catalytic properties  

SciTech Connect

New silica-supported Pd-Cr catalysts have been prepared either by using mixed inorganic salts of the two metals as precursors or through the deposition of Cr(CO){sub 6} on a monometallic palladium catalyst. Analytic electron microscopy shows that palladium-enriched particles are formed. The EXAFS experiments show that when the reduction temperature reaches 870 K, part of the chromium is reduced and interacts with palladium. In the partial hydrogenation of 1,3-butadiene, these catalysts are less active but 100% selective for the formation of butenes. The explanation, proposed on the basis of hydrogen chemisorption and confirmed by XPS data, is a modification of the electronic structure of palladium, leading to a variation of the adsorption coefficients of the diene and alkenes, compared to the values measured on monometallic palladium catalysts.

Borgna, A.; Moraweck, B.; Massardier, J.; Renouprez, A.J. (Institut de Recherches sur la Catalyse, Villeurbanne (France))

1991-03-01

174

Recoil products from p+{sup 118}Sn and d+{sup 118}Sn at 3.65 GeV/A  

SciTech Connect

The recoil properties of the product nuclei from the interaction of 3.65-GeV/nucleon protons and deuterons from the Nuclotron and Synchrophasotron of the Laboratory of High Energies (LHE), Joint Institute for Nuclear Research (JINR) at Dubna, with a {sup 118}Sn target have been studied using catcher foils. The experimental data were analyzed using the mathematical formalism of the standard two-step vector model. The analysis of kinematical characteristics of the light and medium-mass reaction products confirmed the contribution of fragmentation (or multifragmentation) processes in the production of these nuclei. The comparison of the results for protons and deuterons was made. The longitudinal momenta transferred to the target in the interaction with protons and deuterons were similar and was shown to depend only on the velocity, but not on the mass of projectile. Three different Los Alamos versions of the quark-gluon-string model (LAQGSM) were used for the discussion of our experimental results.

Balabekyan, A. R., E-mail: balabekyan@ysu.am; Danagulyan, A. S.; Drnoyan, J. R.; Hovhannisyan, G. H. [Yerevan State University (Armenia); Demekhina, N. A. [Yerevan Physics Institute (Armenia); Adam, J.; Kalinnikov, V. G.; Krivopustov, M. I.; Pronskikh, V. S.; Stegailov, V. I.; Solnyshkin, A. A.; Chaloun, P.; Tsoupko-Sitnikov, V. M. [Joint Institute for Nuclear Research (Russian Federation); Mashnik, S. G. [Los Alamos National Laboratory (United States); Gudima, K. K. [Academy of Science of Moldova, Institute of Applied Physics (Moldova, Republic of)

2007-11-15

175

Properties of palladium doped tin oxide thin films for gas sensors grown by PLD method combined with sputtering process  

Microsoft Academic Search

The gas sensors based on tin dioxide (SnO2) thin films and doped with different amount of palladium (Pd) were synthesized by a new developed preparation system using the pulsed Nd:YAG (532 nm) laser deposition method combined with d.c. sputtering. The Pd-doped SnO2 (SnO2–Pd) thin films have been grown on Si (100) and alumina (Al2O3) substrates using SnO2 targets. The composition

Yoshiaki Suda; Hiroharu Kawasaki; Jun Namba; Keitarou Iwatsuji; Kazuya Doi; Kenji Wada

2003-01-01

176

Palladium Electrodes for Molecular Tunnel Junctions  

PubMed Central

Gold has been the metal of choice for research on molecular tunneling junctions, but it is incompatible with CMOS fabrication because it forms deep level traps in silicon. Palladium electrodes do not contaminate silicon, and also give higher tunnel current signals in the molecular tunnel junctions we have studied. The result is cleaner signals in a recognition-tunneling junction that recognizes the four natural DNA bases as well as 5-methyl cytosine, with no spurious background signals. More than 75% of all the recorded signal peaks call the base correctly. PMID:23037952

Chang, Shuai; Sen, Suman; Zhang, Peiming; Gyarfas, Brett; Ashcroft, Brian; Lefkowitz, Steven; Peng, Hongbo; Lindsay, Stuart

2012-01-01

177

Direct Observation of Paramagnons in Palladium  

SciTech Connect

We report an inelastic neutron scattering study of the spin fluctuations in the nearly ferromagnetic element palladium. Dispersive over-damped collective magnetic excitations or 'paramagnons' are observed up to 128 meV. We analyze our results in terms of a Moriya-Lonzarich-type spin-fluctuation model and estimate the contribution of the spin fluctuations to the low-temperature heat capacity. In spite of the paramagnon excitations being relatively strong, their relaxation rates are large. This leads to a small contribution to the low-temperature electronic specific heat.

Doubble, R. [University of Bristol, UK; Hayden, S M. [University of Bristol, UK; Dai, Pengcheng [University of Tennessee, Knoxville (UTK); Mook Jr, Herbert A [ORNL; Thompson, James R [ORNL; Frost, C. [ISIS Facility, Rutherford Appleton Laboratory

2010-01-01

178

Multifocal iris melanoma treated with total anterior segment palladium-103 plaque radiation therapy  

Microsoft Academic Search

Background  A 73-year-old patient presented in our clinic with multiple pigmented iris nodules in the left eye. Though asymptomatic, there\\u000a was a reported increase in size and number of the nodules during the past year.\\u000a \\u000a \\u000a \\u000a \\u000a Methods  Interventional case report describing a biopsy-proven multifocal iris melanoma treated with a palladium-103 plaque to include\\u000a the entire anterior chamber within the targeted zone. Biopsy was

Vasileois Petousis; Paul T. Finger; Tatyana Milman

2011-01-01

179

Improved dispensing targets for ion beam particle generators  

NASA Technical Reports Server (NTRS)

Beam impinges on palladium-silver tube, which is target, and heats impinged surface causing local hot spot. Contained gas diffuses through hot spot to meet incoming beam and produce desired particles. When beam is turned off, target spot cools and stops dispensing contained gas.

Miller, C. G.

1974-01-01

180

Tritium evolution from various morphologies of palladium  

SciTech Connect

The authors have been able to extend the tritium production techniques to various novel morphologies of palladium. These include small solid wires of various diameters and a type of pressed powder wire and a plasma cell. In most successful experiments, the amount of palladium required, for an equivalent tritium output, has been reduced by a factor of 100 over the older powder methods. In addition, they have observed rates of tritium production (>5 nCi/h) that far exceed most of the previous results. Unfortunately, the methods that they currently use to obtain the tritium are poorly understood and consequently there are numerous variables that need to be investigated before the new methods are as reliable and repeatable as the previous techniques. For instance, it seems that surface and/or bulk impurities play a major role in the successful generation of any tritium. In those samples with total impurity concentrations of >400 ppM essentially no tritium has been generated by the gas loading and electrical simulation methods.

Tuggle, D.G.; Claytor, T.N. [Los Alamos National Lab., NM (United States); Taylor, S.F. [Los Alamos National Lab., NM (United States)]|[Brigham Young Univ., Provo, UT (United States)

1994-04-01

181

Hydrogen Adsorption onto Magnesium Palladium and Magnesium Palladium Niobium Multilayer Thin Films  

NASA Astrophysics Data System (ADS)

We report on the synthesis and characterization of magnesium palladium and magnesium niobium multilayer thin films as a possible reversible hydrogen storage material. The multilayer thin films are characterized by x-ray diffraction (XRD) and x-ray reflectivity (XRR) before and after hydrogen uptake. This study examines the optimal thickness of the magnesium film which would allow the diffusion of hydrogen to form magnesium hydride (MgH2). Thin barriers of palladium and niobium permit hydrogen to permeate while acting as a diffusion barrier to oxygen. Multilayer thin films are grown with various magnesium thicknesses via magnetron sputtering on a sapphire substrate. Thicknesses of Mg, MgH2, Pd, and Nb are reported. Likewise, interfacial roughness attributable to hydrogenation and dehydrogenation cycling measured using XRR are reported.

Steinmetz, Christian; Hettinger, Jeffrey; Dobbins, Tabbetha

2013-03-01

182

International Space Station (ISS) Configuration Post STS-118 Mission  

NASA Technical Reports Server (NTRS)

Back dropped by the colorful Earth, the International Space Station (ISS) boasts its newest configuration upon the departure of Space Shuttle Endeavor and STS-118 mission. Days earlier, construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of supplies.

2007-01-01

183

Palladium-catalyzed phthalazinone synthesis using paraformaldehyde as carbon source.  

PubMed

A palladium-catalyzed one-pot synthesis of phthalazinones from 2-halomethyl benzoates, paraformaldehyde, and aryl hydrazines is described. Various substituted phthalazinones were selectively obtained in good yields using paraformaldehyde as the cheap carbon source (CH). PMID:25265212

Wang, Huamin; Cai, Jinhui; Huang, Huawen; Deng, Guo-Jun

2014-10-17

184

The solid state interaction of palladium with SiC.  

E-print Network

??The solid-state interaction of palladium (Pd) with single crystal silicon carbide (6H- SiC) before and after annealing has been investigated using Rutherford backscattering spectrometry (RBS)… (more)

Kabini, Jeaneth Thokozile

2013-01-01

185

Crossover behavior in hydrogen sensing mechanism for palladium ultrathin films.  

SciTech Connect

Palladium has been extensively studied as a material for hydrogen sensors because of the simplicity of its reversible resistance change when exposed to hydrogen gas. Various palladium films and nanostructures have been used, and different responses have been observed with these diverse morphologies. In some cases, such as with nanowires, the resistance will decrease, whereas in others, such as with thick films, the resistance will increase. Each of these mechanisms has been explored for several palladium structures, but the crossover between them has not been systematically investigated. Here we report on a study aimed at deciphering the nanostructure-property relationships of ultrathin palladium films used as hydrogen gas sensors. The crossover in these films is observed at a thickness of {approx} 5 nm. Ramifications for future sensor developments are discussed.

Darling, S. B.; Ramanathan, M.; Skudlarek, G.; Wang, H. H.; Illinois Math and Science Academy

2010-01-01

186

The palladium-catalyzed synthesis of organic amines  

E-print Network

Chapter 1. The chelating ligand bis[2-(diphenylphosphino)phenyl] ether (DPEphos), in combination with palladium acetate, forms a highly active catalyst system for the coupling of anilines with aryl bromides. The bisphosphine ...

Harris, Michele C., 1975-

2002-01-01

187

Parametric formulation of the dielectric function of palladium and palladium hydride thin films.  

PubMed

A parametric description of the dielectric function of Pd thin films with thicknesses between 10 and 30 nm is reported. These films were grown at room temperature on amorphous quartz substrates by electron beam evaporation, with a base pressure of 7.0×10-7??mbar. By using nonpolarized normal incident light, transmission spectra were measured for wavelengths between 240 and 1050 nm. Inversion of the spectra by means of a projected gradient method enables us to obtain the mean dielectric function of the Pd grains in the films. We follow the Brendel-Bormann model to describe the frequency dependence of the dielectric function, with the plasma frequency, collision frequency, and screening factor as parameters in the free electron term. The contributions of bound electrons and their interband transitions, described in terms of Lorentz oscillators, involve the resonance frequencies, decay times, strengths, and Gaussian widths as parameters of the model. All these parameters have been optimized from the Pd grains' dielectric function, which fits the transmission spectra. A similar procedure was followed for Pd films exposed to a hydrogen atmosphere close to one bar. Thus, the dielectric functions of palladium and palladium hydride can easily be calculated through spectral ranges covering near-ultraviolet, visible, and near-infrared wavelengths. This can be used to model the behavior of nano-sized structures in which palladium particles or thin films are exposed to hydrogen pressures close to one bar. PMID:25321099

Vargas, William E; Azofeifa, Daniel E; Clark, Neville; Solis, Hugo; Montealegre, Felipe; Cambronero, Michael

2014-08-20

188

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data 7,750 7,210 7,820 9,600 10,000 Ruthenium 2,740 4,490 9,880 7,520 20,000 Iridium 207 896 926 1,450 2 for disposal Jan.-Sept. 96 Platinum 14,100 -- 311 -- Palladium 39,300 -- 467 -- Iridium 920

189

Synthesis and characterization of nitrides of iridium and palladiums  

SciTech Connect

We describe the synthesis of nitrides of iridium and palladium using the laser-heated diamond anvil cell. We have used the in situ techniques of x-ray powder diffraction and Raman scattering to characterize these compounds and have compared our experimental findings where possible to the results of first-principles theoretical calculations. We suggest that palladium nitride is isostructural with pyrite, while iridium nitride has a monoclinic symmetry and is isostructural with baddeleyite.

Crowhurst, Jonathan C.; Goncharov, Alexander F.; Sadigh, B.; Zaug, J.M.; Aberg, D.; Meng, Yue; Prakapenka, Vitali B. (LLNL); (CIW); (UC)

2008-08-14

190

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

124 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 10,300 18,200 12,400 9,890 8,630 Ruthenium 11,400 20,900 8,170 10,800 9,940 Iridium 2,270 2,700 3 for disposal FY 20034 FY 2003 Platinum 650 -- 650 1,560 -- Palladium 1,823 -- 1,823 10,900 5,213 Iridium 631

191

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,800 Rhodium 13,500 10,300 18,200 12,400 7,560 Ruthenium 8,880 11,400 20,900 8,170 10,800 Iridium 1,950 2,270 2 Platinum 649 -- 649 4,354 4,055 Palladium 7,027 241 16,714 18,662 9,687 Iridium 784 -- 784 187 -- Prepared

192

Semiautomatic catalytic titration of palladium and gold(III)  

Microsoft Academic Search

Summary A semiautomatic potentiometric method is described for the catalytic titrimetric determination ofµg amounts of palladium or gold. The method is based on the inhibitory effect of palladium and gold(III) ions on the iodide-catalyzed Ce(IV)-As(III) reaction, and is rapid, simple, accurate, precise and sensitive. The indicator reaction is monitored with a platinum electrode and the end-point is obtained from the

T. P. Hadjiioannou; M. M. Timotheou

1977-01-01

193

Binding of biotin labeled horseradish peroxidase using immobilized palladium ions  

Microsoft Academic Search

Palladium ions can be immobilized onto paramagnetic particles using glutaraldehyde activation followed by covalent addition of 2,3-dimercaptosuccinic acid. Loadings as high as 30 wt.% palladium can be achieved using this method. Particles with Pd(II) surface ions can immobilize active biotin labeled horseradish peroxidase from solution. Using equilibrium data at pH 4, 5, 7 and 8, a Langmuir isotherm fit of

Maria Jaya; Antonio A. Garc??a

2002-01-01

194

Palladium-catalyzed annulation of vinylic cyclopropanes and cyclobutanes  

Microsoft Academic Search

Aryl iodides substituted in the ortho position by OH, CH2OH, NH2, NHTs and CH(CO2Et)2 groups react with vinylic cyclopropanes and cyclobutanes in the presence of a palladium catalyst and an appropriate base to afford good yields of heterocycles and carbocycles. The annulation products apparently arise by (1) palladium(0) formation and insertion into the carbon-iodine bond of the aryl iodide to

Richard C. Larock; Eul Kgun Yum

1996-01-01

195

Preparation and characterization of 4-dimethylaminopyridine-stabilized palladium nanoparticles.  

PubMed

4-Dimethylaminopyridine (DMAP)-stabilized palladium nanoparticles with a mean diameter of 3.4 +/- 0.5 nm are prepared from the aqueous phase reduction of Na2PdCl4 using NaBH4 in the presence of DMAP. TEM and UV-vis spectroscopy characterization of the nanoparticle dispersion shows no obvious change in the nanoparticles several months after preparation. 1H NMR spectroscopy of the nanoparticles shows that the nanoparticle dispersion also contains a boron/DMAP complex and two palladium/DMAP complexes. One of the palladium complexes crystallizes out of the dispersion and is identified as Pd(DMAP)4(OH)2 by X-ray crystallography. Following extensive analysis, it is believed that the palladium/DMAP complexes are formed following the oxidation of the palladium nanoparticles. The prepared nanoparticle dispersion promotes selective hydrogen/deuterium (H/D) exchange on the carbon atoms alpha to the endocyclic nitrogen atom on the DMAP-stabilizing ligands through reaction with D2O. This activity is attributed to the presence of the nanoparticles rather than to the presence of the oxidized palladium/DMAP complexes. PMID:17985937

Flanagan, Keith A; Sullivan, James A; Müeller-Bunz, Helge

2007-12-01

196

118th Annual Commencement california institute of technology  

E-print Network

118th Annual Commencement california institute of technology Pasadena, California Information in Caltech's 2012 commencement festivities. Parents, you have provided boundless support to your children technology officer of SpaceX; cofounder, chief executive officer, and product architect of Tesla Motors

197

Agricultural and Forest Meteorology 118 (2003) 137141 Short communication  

E-print Network

understory of moist forests is light (Chazdon and Pearcy, 1991; Canham et al., 1994). In the forestsAgricultural and Forest Meteorology 118 (2003) 137­141 Short communication Landscape variations in understory PAR for a mixed deciduous forest in New England, USA Matthew M. Fladeland, Mark S. Ashton, Xuhui

Lee, Xuhui

198

Cleanup Verification Package for the 118-F-6 Burial Ground  

SciTech Connect

This cleanup verification package documents completion of remedial action for the 118-F-6 Burial Ground located in the 100-FR-2 Operable Unit of the 100-F Area on the Hanford Site. The trenches received waste from the 100-F Experimental Animal Farm, including animal manure, animal carcasses, laboratory waste, plastic, cardboard, metal, and concrete debris as well as a railroad tank car.

H. M. Sulloway

2008-10-02

199

40 CFR 51.118 - Stack height provisions.  

Code of Federal Regulations, 2012 CFR

...or before December 31, 1970, except where pollutants...111(a)(3) of the Clean Air Act, which were constructed...out after December 31, 1970; or (2) coal-fired...provisions of section 118 of the Clean Air Act, which commenced...

2012-07-01

200

40 CFR 51.118 - Stack height provisions.  

Code of Federal Regulations, 2013 CFR

...or before December 31, 1970, except where pollutants...111(a)(3) of the Clean Air Act, which were constructed...out after December 31, 1970; or (2) coal-fired...provisions of section 118 of the Clean Air Act, which commenced...

2013-07-01

201

40 CFR 51.118 - Stack height provisions.  

Code of Federal Regulations, 2010 CFR

...or before December 31, 1970, except where pollutants...111(a)(3) of the Clean Air Act, which were constructed...out after December 31, 1970; or (2) coal-fired...provisions of section 118 of the Clean Air Act, which commenced...

2010-07-01

202

40 CFR 51.118 - Stack height provisions.  

Code of Federal Regulations, 2011 CFR

...or before December 31, 1970, except where pollutants...111(a)(3) of the Clean Air Act, which were constructed...out after December 31, 1970; or (2) coal-fired...provisions of section 118 of the Clean Air Act, which commenced...

2011-07-01

203

118 Environmental Science and Policy Environmental Science and Policy  

E-print Network

118 · Environmental Science and Policy Environmental Science and Policy ADVISORY COMMITTEE: A of the need for an appropriate balance between breadth and depth of training, the Environmental Science in another discipline. The Environmental Science and Policy major provides breadth in basic course work

Lewis, Robert Michael

204

Life as a sober citizen: Aldo Leopold's Wildlife Ecology 118  

Microsoft Academic Search

This historic case study addressed the issue of the lack of citizen action toward environmentally responsible behavior. Although there have been studies regarding components of environmental responsible behavior [ERB], there has been little focus on historic models of exemplary figures of ERB. This study examined one of the first conservation courses in the United States, Wildlife Ecology 118, taught by

Nancy Stearns Theiss

2009-01-01

205

19 CFR 118.12 - Action on application.  

Code of Federal Regulations, 2010 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.12 Action on application...the facility proposed to be operated as the CES, the proposed fee schedule, the list...number of employees to be involved in the CES operation. The port director, based...

2010-04-01

206

19 CFR 118.12 - Action on application.  

...EXAMINATION STATIONS Application To Establish a CES § 118.12 Action on application...the facility proposed to be operated as the CES, the proposed fee schedule, the list...number of employees to be involved in the CES operation. The port director, based...

2014-04-01

207

19 CFR 118.13 - Notification of selection or nonselection.  

Code of Federal Regulations, 2011 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.13 Notification of selection... The applicant selected to operate a CES will be notified in writing by the...final selection and of the date on which the CES will commence operation under the...

2011-04-01

208

19 CFR 118.12 - Action on application.  

Code of Federal Regulations, 2011 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.12 Action on application...the facility proposed to be operated as the CES, the proposed fee schedule, the list...number of employees to be involved in the CES operation. The port director, based...

2011-04-01

209

19 CFR 118.11 - Contents of application.  

Code of Federal Regulations, 2010 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.11 Contents of application. Each application to operate a CES shall consist of the following information...address of the facility to be operated as the CES, the names of all principals or...

2010-04-01

210

19 CFR 118.13 - Notification of selection or nonselection.  

...EXAMINATION STATIONS Application To Establish a CES § 118.13 Notification of selection... The applicant selected to operate a CES will be notified in writing by the...final selection and of the date on which the CES will commence operation under the...

2014-04-01

211

19 CFR 118.13 - Notification of selection or nonselection.  

Code of Federal Regulations, 2010 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.13 Notification of selection... The applicant selected to operate a CES will be notified in writing by the...final selection and of the date on which the CES will commence operation under the...

2010-04-01

212

19 CFR 118.12 - Action on application.  

Code of Federal Regulations, 2013 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.12 Action on application...the facility proposed to be operated as the CES, the proposed fee schedule, the list...number of employees to be involved in the CES operation. The port director, based...

2013-04-01

213

19 CFR 118.11 - Contents of application.  

...EXAMINATION STATIONS Application To Establish a CES § 118.11 Contents of application. Each application to operate a CES shall consist of the following information...address of the facility to be operated as the CES, the names of all principals or...

2014-04-01

214

19 CFR 118.13 - Notification of selection or nonselection.  

Code of Federal Regulations, 2013 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.13 Notification of selection... The applicant selected to operate a CES will be notified in writing by the...final selection and of the date on which the CES will commence operation under the...

2013-04-01

215

19 CFR 118.11 - Contents of application.  

Code of Federal Regulations, 2012 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.11 Contents of application. Each application to operate a CES shall consist of the following information...address of the facility to be operated as the CES, the names of all principals or...

2012-04-01

216

19 CFR 118.12 - Action on application.  

Code of Federal Regulations, 2012 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.12 Action on application...the facility proposed to be operated as the CES, the proposed fee schedule, the list...number of employees to be involved in the CES operation. The port director, based...

2012-04-01

217

19 CFR 118.13 - Notification of selection or nonselection.  

Code of Federal Regulations, 2012 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.13 Notification of selection... The applicant selected to operate a CES will be notified in writing by the...final selection and of the date on which the CES will commence operation under the...

2012-04-01

218

19 CFR 118.11 - Contents of application.  

Code of Federal Regulations, 2011 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.11 Contents of application. Each application to operate a CES shall consist of the following information...address of the facility to be operated as the CES, the names of all principals or...

2011-04-01

219

19 CFR 118.11 - Contents of application.  

Code of Federal Regulations, 2013 CFR

...EXAMINATION STATIONS Application To Establish a CES § 118.11 Contents of application. Each application to operate a CES shall consist of the following information...address of the facility to be operated as the CES, the names of all principals or...

2013-04-01

220

Credit PSR. View looks east southeast (118°) across foundations of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Credit PSR. View looks east southeast (118°) across foundations of North Base Administration Building (originally numbered T-50) toward Building 4318 (Warehouse) and Building 4305 (Unicon Portable Hangar). Building 4401 (Hangar No. 1) appears in extreme left background - Edwards Air Force Base, North Base, Administration Building T-50, D Street, Boron, Kern County, CA

221

Electrocatalysts having platium monolayers on palladium, palladium alloy, and gold alloy core-shell nanoparticles, and uses thereof  

DOEpatents

The invention relates to platinum-coated particles useful as fuel cell electrocatalysts. The particles are composed of a noble metal or metal alloy core at least partially encapsulated by an atomically thin surface layer of platinum atoms. The invention particularly relates to such particles having a palladium, palladium alloy, gold alloy, or rhenium alloy core encapsulated by an atomic monolayer of platinum. In other embodiments, the invention relates to fuel cells containing these electrocatalysts and methods for generating electrical energy therefrom.

Adzic, Radoslav (Setauket, NY); Mo, Yibo (Naperville, IL); Vukmirovic, Miomir (Port Jefferson Station, NY); Zhang, Junliang (Rochester, NY)

2010-12-21

222

Interaction of hydrogen with polycrystalline palladium films  

NASA Astrophysics Data System (ADS)

The kinetics of hydrogen interaction with thin palladium films at 195, 298, 348 and 360 K was studied by means of surface-potential change (?SP) measurements and thermal desorption mass spectrometry (TDMS). Dissociative adsorption occurs at all temperatures, forming mobile states of the hydrogen adsorbate. The kinetics of adsorption at 298 K, at coverage ? ?0.8, is strongly influenced by interaction within the adsorbate layer. Two TDMS peaks, well described by second-order desorption kinetics, were detected when hydrogen adsorption was carried out at 195 K. However, a small part of the hydrogen adsorbate desorbs according to the first-order kinetic equation. This effect can be attributed to the existence of interactions between adsorbed hydrogen atoms, subsurface hydrogen, or can be related to structural imperfections of the Pd film surface. A detailed analysis of the isothermal desorption of the weakly adsorbed hydrogen species was performed. The results obtained from TDMS and from isothermal desorption are compared.

Lisowski, W.; Du?, R.

1993-10-01

223

Palladium-catalyzed substitution of (coumarinyl)methyl acetates with C-, N-, and S-nucleophiles  

E-print Network

The palladium-catalyzed nucleophilic substitution of (coumarinyl)methyl acetates is described. The reaction proceeds though a palladium ?-benzyl-like complex and allows for many different types of C-, N-, and S-nucleophiles to be regioselectively...

Chattopadhyay, Kalicharan; Fenster, Erik; Grenning, Alexander James; Tunge, Jon A.

2012-07-27

224

A palladium-catalyzed reaction of aryl halides, potassium metabisulfite, and hydrazines.  

PubMed

Aryl N-aminosulfonamides could be easily produced via a palladium-catalyzed coupling of aryl halides, potassium metabisulfite, and hydrazines. Potassium metabisulfite is an excellent equivalent of sulfur dioxide in the reaction of palladium-catalyzed aminosulfonylation. PMID:22945283

Ye, Shengqing; Wu, Jie

2012-10-14

225

The Resolution of Important Pharmaceutical Building Blocks by Palladium-Catalyzed Aerobic Oxidation of Secondary Alcohols  

E-print Network

The Resolution of Important Pharmaceutical Building Blocks by Palladium-Catalyzed Aerobic Oxidation and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering. Abstract: The palladium-catalyzed aerobic oxidative kinetic resolution of key pharmaceutical building

Stoltz, Brian M.

226

Life as a sober citizen: Aldo Leopold's Wildlife Ecology 118  

NASA Astrophysics Data System (ADS)

This historic case study addressed the issue of the lack of citizen action toward environmentally responsible behavior. Although there have been studies regarding components of environmental responsible behavior [ERB], there has been little focus on historic models of exemplary figures of ERB. This study examined one of the first conservation courses in the United States, Wildlife Ecology 118, taught by Aldo Leopold (1887--1948) for 13 years at the University of Wisconsin. Today, Aldo Leopold is recognized as an exemplary conservationist whose land ethic is cited as providing the ecological approach needed for understanding the complex issues of modern society. The researcher conjectured that examination of one of the first environmental education courses could support and strengthen environmental education practices by providing a heuristic perspective. The researcher used two different strategies for analysis of the case. For Research Question One---"What were Leopold's teaching strategies in Wildlife Ecology 118?"---the researcher used methods of comparative historical analysis. The researcher examined the learning outcomes that Leopold used in Wildlife Ecology 118 and compared them against a rubric of the Four Strands for Environmental Education (North American Association for Environmental Education [NAAEE], 1999). The Four Strands for Environmental Education are the current teaching strategies used by educators. The results indicated that Wildlife Ecology 118 scored high in Knowledge of Processes and Systems and Environmental Problem Solving strands. Leopold relied on historic case examples and animal biographies to build stories that engaged students. Field trips gave students practical experience for environmental knowledge with special emphasis on phenology. For Research Question Two---"What was the context of the lessons in Wildlife Ecology 118?"---the researcher used environmental history methods for analysis. Context provided the knowledge and understanding of Leopold's choices for developing lessons that he thought would engage students to become environmentally responsible citizens. The contexts were grouped into four categories: (a) work and research related, (b) professional development, (c) leisure and, (d) public service. There were five themes that emerged from the course contexts: (a) case histories, (b) animal biographies, (c) phenology application, (d) food chains, and (e) ecosystems. The results of the study indicated that Wildlife Ecology 118 ranks high in areas of environmental problem solving and knowledge of processes and systems. Both of the areas are often difficult for educators to incorporate in their lessons. Through case histories, animal biographies, phenology, ecological diagrams, ecosystem comparisons and field trips, Leopold provides many examples that can be easily updated and used in current classroom practices, both in K--12 and college levels.

Theiss, Nancy Stearns

227

Dynamics of palladium on nanocarbon in the direct synthesis of H2O2.  

PubMed

This work aims to clarify the nanostructural transformation accompanying the loss of activity and selectivity for the hydrogen peroxide synthesis of palladium and gold-palladium nanoparticles supported on N-functionalized carbon nanotubes. High-resolution X-ray photoemission spectroscopy (XPS) allows the discrimination of metallic palladium, electronically modified metallic palladium hosting impurities, and cationic palladium. This is paralleled by the morphological heterogeneity observed by high-resolution TEM, in which nanoparticles with an average size of 2 nm coexisted with very small palladium clusters. The morphological distribution of palladium is modified after reaction through sintering and dissolution/redeposition pathways. The loss of selectivity is correlated to the extent to which these processes occur as a result of the instability of the particle at the carbon surface. We assign beneficial activity in the selective hydrogenation of oxygen to palladium clusters with a modified electronic structure compared with palladium metal or palladium oxides. These beneficial species are formed and stabilized on carbons modified with nitrogen atoms in substitutional positions. The formation of larger metallic palladium particles not only reduces the number of active sites for the synthesis, but also enhances the activity for deep hydrogenation to water. The structural instability of the active species is thus detrimental in a dual way. Minimizing the chance of sintering of palladium clusters by all means is thus the key to better performing catalysts. PMID:24133011

Arrigo, Rosa; Schuster, Manfred E; Abate, Salvatore; Wrabetz, Sabine; Amakawa, Kazuhiko; Teschner, Detre; Freni, Maria; Centi, Gabriele; Perathoner, Siglinda; Hävecker, Michael; Schlögl, Robert

2014-01-01

228

Palladium nanoparticle formation on TiO?(110) by thermal decomposition of palladium(II) hexafluoroacetylacetonate.  

PubMed

Palladium nanoparticles were synthesized by thermal decomposition of palladium(II) hexafluoroacetylacetonate (Pd(hfac)2), an atomic layer deposition (ALD) precursor, on a TiO2(110) surface. According to X-ray photoelectron spectroscopy (XPS), Pd(hfac)2 adsorbs on TiO2(110) dissociatively yielding Pd(hfac)(ads), hfac(ads), and adsorbed fragments of the hfac ligand at 300 K. A (2 × 1) surface overlayer was observed by scanning tunneling microscopy (STM), indicating that hfac adsorbs in a bidentate bridging fashion across two Ti 5-fold atoms and Pd(hfac) adsorbs between two bridging oxygen atoms on the surface. Annealing of the Pd(hfac)(ads) and hfac(ads) species at 525 K decomposed the adsorbed hfac ligands, leaving PdO-like species and/or Pd atoms or clusters. Above 575 K, the XPS Pd 3d peaks shift toward lower binding energies and Pd nanoparticles are observed by STM. These observations point to the sintering of Pd atoms and clusters to Pd nanoparticles. The average height of the Pd nanoparticles was 1.2 ± 0.6 nm at 575 K and increased to 1.7 ± 0.5 nm following annealing at 875 K. The Pd coverage was estimated from XPS and STM data to be 0.05 and 0.03 monolayers (ML), respectively, after the first adsorption/decomposition cycle. The amount of palladium deposited on the TiO2(110) surface increased linearly with the number of adsorption/decomposition cycles with a growth rate of 0.05 ML or 0.6 Å per cycle. We suggest that the removal of the hfac ligand and fragments eliminates the nucleation inhibition of Pd nanoparticles previously observed for the Pd(hfac)2 precursor on TiO2. PMID:25093626

Gharachorlou, Amir; Detwiler, Michael D; Nartova, Anna V; Lei, Yu; Lu, Junling; Elam, Jeffrey W; Delgass, W Nicholas; Ribeiro, Fabio H; Zemlyanov, Dmitry Y

2014-08-27

229

The influence of laser wavelength and fluence on palladium nanoparticles produced by pulsed laser ablation in deionized water  

NASA Astrophysics Data System (ADS)

Homogeneous spherical palladium (Pd) nanoparticles were synthesized by pulsed laser ablation of a solid Pd foil target submerged in deionized water, without the addition of any external chemical surfactant. The influence of laser wavelength (355, 532, and 1064 nm) and fluence (8.92, 12.74, and 19.90 J/cm2) on nucleation, growth, and aggregation of Pd nanoparticles were systematically studied. Microstructural and optical properties of the obtained nanoparticles were studied by field emission transmission electron microscopy (FETEM), energy dispersive X-ray spectroscopy, and UV-vis spectroscopy. FETEM micrographs indicate that the average nanocrystallite sizes are relatively low (3-6 nm) and homogeneous for the particles synthesized at the laser wavelengths of 355 and 532 nm. However, at a laser wavelength of 1064 nm, the average nanocrystallite size is relatively large and inhomogeneous in nature. Moreover, we observe that the mean diameter and production rate of particles increases with an increase in laser fluence. The selected area electron diffraction patterns obtained from isolated Pd nanoparticles show the characteristic diffused electron diffraction rings of polycrystalline materials with a face-centered cubic structure. Absorbance spectrum of the synthesized nanoparticle solution shows a broad absorption band, which corresponds to a typical inter-band transition of a metallic system, indicating the production of pure palladium nanoparticles. The present work provides new insights into the effect of laser wavelength and fluence on the control of size and aggregation of palladium nanoparticles in the liquid medium.

Kim, Jinil; Amaranatha Reddy, D.; Ma, Rory; Kim, Tae Kyu

2014-11-01

230

International Space Station (ISS) Configuration Post STS-118 Mission  

NASA Technical Reports Server (NTRS)

Back dropped by the blue Earth, the International Space Station (ISS) boasts its newest configuration upon the departure of Space Shuttle Endeavor and STS-118 mission. Days earlier, construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of equipment and supplies.

2007-01-01

231

Cleanup Verification Package for the118-F-2 Burial Ground  

SciTech Connect

This cleanup verification package documents completion of remedial action, sampling activities, and compliance with cleanup criteria for the 118-F-2 Burial Ground. This burial ground, formerly called Solid Waste Burial Ground No. 1, was the original solid waste disposal site for the 100-F Area. Eight trenches contained miscellaneous solid waste from the 105-F Reactor and one trench contained solid waste from the biology facilities.

J. M. Capron and K. A. Anselm

2008-02-21

232

Probable cluster decays from $^{270-318}$118 superheavy nuclei  

E-print Network

The cluster decay process in $^{270-318}$118 superheavy nuclei has been studied extensively within the Coulomb and proximity potential model (CPPM), thereby investigating the probable cluster decays from the various isotopes of $Z = 118$. On comparing the predicted decay half lives with the values evaluated using the Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal Decay Law (UDL) of Qi et al., and the Scaling Law of Horoi et al., it was seen that, our values matches well with these theoretical values. A comparison of the predicted alpha decay half life of the experimentally synthesized superheavy isotope $^{294}$118 with its corresponding experimental value shows that, our theoretical value is in good agreement with the experimental value. The plots for $log_{10}(T_{1/2})$ against the neutron number of the daughter in the corresponding decay reveals the behavior of the cluster half lives with the neutron number of the daughter nuclei and for most of the decays, the half life was fo...

Santhosh, K P

2014-01-01

233

Probable cluster decays from $^{270-318}$118 superheavy nuclei  

E-print Network

The cluster decay process in $^{270-318}$118 superheavy nuclei has been studied extensively within the Coulomb and proximity potential model (CPPM), thereby investigating the probable cluster decays from the various isotopes of $Z = 118$. On comparing the predicted decay half lives with the values evaluated using the Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal Decay Law (UDL) of Qi et al., and the Scaling Law of Horoi et al., it was seen that, our values matches well with these theoretical values. A comparison of the predicted alpha decay half life of the experimentally synthesized superheavy isotope $^{294}$118 with its corresponding experimental value shows that, our theoretical value is in good agreement with the experimental value. The plots for $log_{10}(T_{1/2})$ against the neutron number of the daughter in the corresponding decay reveals the behavior of the cluster half lives with the neutron number of the daughter nuclei and for most of the decays, the half life was found to be the minimum for the decay leading to a daughter with $N = 184$. Most of the predicted half lives are well within the present experimental upper limit ($10^{30}$s) and lower limit ($10^{-6}$s) for measurements and hence these predictions may be of great use for further experimental investigation on cluster decay in the superheavy region.

K. P. Santhosh; B. Priyanka

2014-09-02

234

32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2014-07-01

235

50 CFR 86.118 - What does this survey instrument include?  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false What does this survey instrument include? 86.118 Section 86...PROGRAM How States Will Complete Access Needs Surveys § 86.118 What does this survey instrument include? (a) We divided...

2011-10-01

236

50 CFR 86.118 - What does this survey instrument include?  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false What does this survey instrument include? 86.118 Section 86...PROGRAM How States Will Complete Access Needs Surveys § 86.118 What does this survey instrument include? (a) We divided...

2010-10-01

237

27 CFR 20.118 - Rubbing alcohol general-use formula.  

27 Alcohol, Tobacco Products and Firearms 1 2014-04-01 2014-04-01 false Rubbing alcohol general-use formula. 20.118 Section 20.118 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE...

2014-04-01

238

32 CFR 643.118 - Nonappropriated funds-Authority to permit erection of structures.  

...funds-Authority to permit erection of structures. 643.118 Section 643.118...Authority to permit erection of structures. The authority of installation commanders to permit structures to be erected on military...

2014-07-01

239

40 CFR 90.118 - Certification procedure-service accumulation and usage of deterioration factors.  

...accumulation and usage of deterioration factors. 90.118 Section 90.118 Protection...accumulation and usage of deterioration factors. (a)(1) The test engine must...that emissions are representative of production engines. (d) The...

2014-07-01

240

41 CFR 102-118.60 - To what extent must my agency use electronic commerce?  

Code of Federal Regulations, 2010 CFR

... To what extent must my agency use electronic commerce? 102-118.60 Section 102-118... To what extent must my agency use electronic commerce? Your agency must use electronic commerce in all areas of your...

2010-07-01

241

23 CFR 636.118 - Is team switching allowed after contract award?  

Code of Federal Regulations, 2010 CFR

23 Highways 1 2010-04-01 2010-04-01... 636.118 Section 636.118 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION...ENGINEERING AND TRAFFIC OPERATIONS DESIGN-BUILD CONTRACTING General §...

2010-04-01

242

27 CFR 20.118 - Rubbing alcohol general-use formula.  

Code of Federal Regulations, 2010 CFR

...formula. 20.118 Section 20.118 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT...TREASURY LIQUORS DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM Formulas and Statements of...

2010-04-01

243

41 CFR 102-118.30 - Are Government corporations bound by this part?  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Are Government corporations bound by this part? 102-118.30 Section...102-118.30 Are Government corporations bound by this part? No, Government corporations are not bound by this part. However, they may...

2010-07-01

244

22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-04-01

245

16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-01-01

246

22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

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2011-04-01

247

16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-01-01

248

34 CFR 97.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...proposals lacking definite plans for involvement of human subjects. 97.118 Section 97.118...Secretary, Department of Education PROTECTION OF HUMAN SUBJECTS Federal Policy for the Protection of Human Subjects (Basic ED Policy for...

2010-07-01

249

14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-01-01

250

45 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...proposals lacking definite plans for involvement of human subjects. 46.118 Section 46.118 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION PROTECTION OF HUMAN SUBJECTS Basic HHS Policy for...

2010-10-01

251

10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-01-01

252

40 CFR 26.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 26.118 Section 26.118...PROTECTION AGENCY GENERAL PROTECTION OF HUMAN SUBJECTS Basic EPA Policy for Protection of Subjects in Human Research Conducted or Supported by EPA...

2011-07-01

253

45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-10-01

254

45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-10-01

255

32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2011-07-01

256

14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-01-01

257

40 CFR 26.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 26.118 Section 26.118...PROTECTION AGENCY GENERAL PROTECTION OF HUMAN SUBJECTS Basic EPA Policy for Protection of Subjects in Human Research Conducted or Supported by EPA...

2010-07-01

258

34 CFR 97.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...proposals lacking definite plans for involvement of human subjects. 97.118 Section 97.118...Secretary, Department of Education PROTECTION OF HUMAN SUBJECTS Federal Policy for the Protection of Human Subjects (Basic ED Policy for...

2011-07-01

259

32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-07-01

260

10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2010 CFR

...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2010-01-01

261

45 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2011 CFR

...proposals lacking definite plans for involvement of human subjects. 46.118 Section 46.118 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION PROTECTION OF HUMAN SUBJECTS Basic HHS Policy for...

2011-10-01

262

45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-10-01

263

10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-01-01

264

32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-07-01

265

16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-01-01

266

34 CFR 97.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...proposals lacking definite plans for involvement of human subjects. 97.118 Section 97.118...Secretary, Department of Education PROTECTION OF HUMAN SUBJECTS Federal Policy for the Protection of Human Subjects (Basic ED Policy for...

2012-07-01

267

22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2014-04-01

268

22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-04-01

269

40 CFR 26.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 26.118 Section 26.118...PROTECTION AGENCY GENERAL PROTECTION OF HUMAN SUBJECTS Basic EPA Policy for Protection of Subjects in Human Research Conducted or Supported by EPA...

2013-07-01

270

45 CFR 690.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 690.118 Section 690...NATIONAL SCIENCE FOUNDATION PROTECTION OF HUMAN SUBJECTS § 690.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-10-01

271

10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-01-01

272

16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2014-01-01

273

34 CFR 97.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...proposals lacking definite plans for involvement of human subjects. 97.118 Section 97.118...Secretary, Department of Education PROTECTION OF HUMAN SUBJECTS Federal Policy for the Protection of Human Subjects (Basic ED Policy for...

2013-07-01

274

14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-01-01

275

45 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...proposals lacking definite plans for involvement of human subjects. 46.118 Section 46.118 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION PROTECTION OF HUMAN SUBJECTS Basic HHS Policy for...

2013-10-01

276

40 CFR 26.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 26.118 Section 26.118...PROTECTION AGENCY GENERAL PROTECTION OF HUMAN SUBJECTS Basic EPA Policy for Protection of Subjects in Human Research Conducted or Supported by EPA...

2012-07-01

277

32 CFR 219.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 219.118 Section 219...CONTINUED) MISCELLANEOUS PROTECTION OF HUMAN SUBJECTS § 219.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-07-01

278

22 CFR 225.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 225.118 Section 225...INTERNATIONAL DEVELOPMENT PROTECTION OF HUMAN SUBJECTS § 225.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-04-01

279

34 CFR 97.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...proposals lacking definite plans for involvement of human subjects. 97.118 Section 97.118...Secretary, Department of Education PROTECTION OF HUMAN SUBJECTS Federal Policy for the Protection of Human Subjects (Basic ED Policy for...

2014-07-01

280

16 CFR 1028.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2013 CFR

...lacking definite plans for involvement of human subjects. 1028.118 Section 1028...SAFETY COMMISSION GENERAL PROTECTION OF HUMAN SUBJECTS § 1028.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2013-01-01

281

10 CFR 745.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 745.118 Section 745... DEPARTMENT OF ENERGY PROTECTION OF HUMAN SUBJECTS § 745.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2014-01-01

282

14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS § 1230.118 Applications...lacking definite plans for involvement of human subjects. Certain types...

2012-01-01

283

45 CFR 46.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

Code of Federal Regulations, 2012 CFR

...proposals lacking definite plans for involvement of human subjects. 46.118 Section 46.118 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION PROTECTION OF HUMAN SUBJECTS Basic HHS Policy for...

2012-10-01

284

Size-Dependent Antimicrobial Effects of Novel Palladium Nanoparticles  

PubMed Central

Investigating the interactions between nanoscale materials and microorganisms is crucial to provide a comprehensive, proactive understanding of nanomaterial toxicity and explore the potential for novel applications. It is well known that nanomaterial behavior is governed by the size and composition of the particles, though the effects of small differences in size toward biological cells have not been well investigated. Palladium nanoparticles (Pd NPs) have gained significant interest as catalysts for important carbon-carbon and carbon-heteroatom reactions and are increasingly used in the chemical industry, however, few other applications of Pd NPs have been investigated. In the present study, we examined the antimicrobial capacity of Pd NPs, which provides both an indication of their usefulness as target antimicrobial compounds, as well as their potency as potential environmental pollutants. We synthesized Pd NPs of three different well-constrained sizes, 2.0±0.1 nm, 2.5±0.2 nm and 3.1±0.2 nm. We examined the inhibitory effects of the Pd NPs and Pd2+ ions toward gram negative Escherichia coli (E. coli) and gram positive Staphylococcus aureus (S. aureus) bacterial cultures throughout a 24 hour period. Inhibitory growth effects of six concentrations of Pd NPs and Pd2+ ions (2.5×10?4, 10?5, 10?6, 10?7, 10?8, and 10?9 M) were examined. Our results indicate that Pd NPs are generally much more inhibitory toward S. aureus than toward E. coli, though all sizes are toxic at ?10?5 M to both organisms. We observed a significant difference in size-dependence of antimicrobial activity, which differed based on the microorganism tested. Our work shows that Pd NPs are highly antimicrobial, and that fine-scale (<1 nm) differences in size can alter antimicrobial activity. PMID:24465824

Adams, Clara P.; Walker, Katherine A.; Obare, Sherine O.; Docherty, Kathryn M.

2014-01-01

285

Development and Bioorthogonal Activation of Palladium-Labile Prodrugs of Gemcitabine  

PubMed Central

Bioorthogonal chemistry has become one of the main driving forces in current chemical biology, inspiring the search for novel biocompatible chemospecific reactions for the past decade. Alongside the well-established labeling strategies that originated the bioorthogonal paradigm, we have recently proposed the use of heterogeneous palladium chemistry and bioorthogonal Pd0-labile prodrugs to develop spatially targeted therapies. Herein, we report the generation of biologically inert precursors of cytotoxic gemcitabine by introducing Pd0-cleavable groups in positions that are mechanistically relevant for gemcitabine’s pharmacological activity. Cell viability studies in pancreatic cancer cells showed that carbamate functionalization of the 4-amino group of gemcitabine significantly reduced (>23-fold) the prodrugs’ cytotoxicity. The N-propargyloxycarbonyl (N-Poc) promoiety displayed the highest sensitivity to heterogeneous palladium catalysis under biocompatible conditions, with a reaction half-life of less than 6 h. Zebrafish studies with allyl, propargyl, and benzyl carbamate-protected rhodamines confirmed N-Poc as the most suitable masking group for implementing in vivo bioorthogonal organometallic chemistry. PMID:24867590

2014-01-01

286

Superconductivity and the structural phase transitions in palladium hydride and palladium deuteride  

SciTech Connect

The results of two experimental studies of the superconducting transition temperature, T/sub c/, of palladium hydride, PdH/sub x/, and palladium deuteride, PdD/sub x/, are presented. In the first study, the superconducting transition temperature of PdH/sub x/(D/sub x/) is studied as a function of H(D) concentration, x, in the temperature range from 0.2 K to 4K. The data join smoothly with those reported previously by Miller and Satterthwaite at higher temperatures, and the composite data are described by the empirical relation T/sub c/ = 150.8 (x-x/sub o/)/sup 2/ /sup 244/, where x/sub o/ = 0.715 for hydride samples and 0.668 for deuteride samples. The results, when compared with the theoretical predictions of Klein and Papaconstantopoulos, et al., raise questions about the validity of their explanation of the reverse isotope effect, which is based solely on a difference in force constants. In the second study, the effect of the order-disorder structural transition associated with the 50 K anomaly on the superconductivity of PdH/sub x/(D/sub x/) is investigated. Samples were quenched to low temperatures in the disordered state, and their transition temperatures measured. The samples were then annealed just below the anomaly temperature, and the ordering process followed by monitoring the change in sample resistance. The transition temperatures in the ordered state were then measured.

Standley, Robert Wendell

1980-01-01

287

21 CFR 118.1 - Persons covered by the requirements in this part.  

Code of Federal Regulations, 2010 CFR

...as defined in § 118.3, you must comply only with the refrigeration requirements in § 118.4(e) for production of eggs on...processing or egg products facilities, you must comply with the refrigeration requirements in § 118.4(e). This section applies...

2010-04-01

288

Phosphorylation of histone H3(T118) alters nucleosome dynamics and remodeling  

E-print Network

by the SWI/SNF chromatin remodeler. These studies suggest that H3(T118ph) directly enhances and may reprogram chromatin metabolism (14). H3(T118) was also found to influence the requirement for SWI/SNF chromatin remodeling (15). A Saccharomyces cerevisiae genetic screen identified H3(T118I) as a SWI/SNF independent (Sin

Poirier, Michael

289

Severity Indices of Personality Problems (SIPP-118) in Adolescents: Reliability and Validity  

ERIC Educational Resources Information Center

The Severity Indices of Personality Problems (SIPP-118; Verheul et al., 2008) is a self-report questionnaire focusing on core components of (mal)adaptive personality functioning. The SIPP-118 was developed and validated in an adult population. In adult populations, the 16 facets of the SIPP-118 fit into 5 higher order domains: self-control,…

Feenstra, Dine J.; Hutsebaut, Joost; Verheul, Roel; Busschbach, Jan J. V.

2011-01-01

290

Bimetallic palladium-platinum dendrimer-encapsulated catalysts.  

PubMed

We report the synthesis, characterization, and catalytic activity of bimetallic palladium-platinum dendrimer-encapsulated catalysts (DECs). These materials are prepared by co-complexation of different ratios of palladium and platinum salts to the interior tertiary amines of fourth-generation, hydroxyl-terminated poly(amidoamine) (PAMAM) dendrimers. Chemical reduction of these composites yields stable, fairly monodisperse, water-soluble bimetallic DECs having sizes on the order of 1.9 +/- 0.4 nm. Evidence that these nanoparticles are bimetallic comes from single-particle X-ray energy dispersive spectroscopy (EDS) and catalysis experiments. The latter indicate that the hydrogenation rate of allyl alcohol is enhanced in the presence of the bimetallic nanoparticles compared to DECs containing only platinum or only palladium nanoparticles. EDS results indicate that the percentage composition of the bimetallics is reflected by the percentage of metal salts initially complexed with the dendrimer. PMID:12656595

Scott, Robert W J; Datye, Abhaya K; Crooks, Richard M

2003-04-01

291

Hydrogen isotope separation by permeation through palladium membranes  

NASA Astrophysics Data System (ADS)

An inverse isotope effect is observed for both the solubility and the diffusivity of hydrogen in palladium, i.e., the lightest isotope has the highest solubility and lowest diffusivity. For permeation of hydrogen isotopes through palladium alloy membranes when diffusion is the rate determining step tritium is the least permeating isotope. Since the absolute values of hydrogen, deuterium and tritium permeabilities in palladium differ considerably, the effect could be employed as a basis for technical isotope separation. Using an experimentally verified mathematical model, a parametric computational study was performed to show the net isotope effects in permeate and bleed flows when feeding a technical permeator with various hydrogen isotope mixtures under different feed and permeate pressures. The technical feasibility of hydrogen isotope permeation as a method for separation is discussed with regard to the necessary process control for either a single permeator or a cascade.

Glugla, Manfred; Cristescu, Ioana Ruxandra; Cristescu, Ion; Demange, David

2006-09-01

292

Isothermal decomposition of gamma-irradiated palladium acetate  

NASA Astrophysics Data System (ADS)

The isothermal decomposition of un-irradiated (pristine) and pre-gamma-irradiated palladium acetate was studied in the temperature range (498-508 K) and in air using the isothermal thermogravimetric technique. The data were analysed using various solid state reaction models. The results showed that the kinetics of isothermal decomposition of palladium acetate was governed by random nucleation reaction (Erofe'ev equation A(3)). The activation energies of the main decomposition process for un-irradiated and pre-gamma-irradiated samples were calculated. The change in texture and crystal structure of the investigated palladium acetate by gamma-irradiation was studied using electron microscopy and X-ray diffraction techniques.

Mahfouz, R. M.; Alshehri, S. M.; Monshi, M. A. S.; Abd El-Salam, N. M.

2004-06-01

293

Dosimetric study of a new palladium seed.  

PubMed

In this paper, the dosimetric parameters for a new palladium seed design: the InterSource(103,)(1) are presented as recommended by the AAPM in the TG-43 formalism. Measurements are made with LiF thermoluminescent dosimeters (size of 1mm(3)) in solid water phantoms WT1 to obtain the dose constant, the radial dose function and the anisotropy function. The TLD were calibrated at 6 MV and an energy correction factor of 1.40 has been applied. The same dose parameters are also obtained by Monte Carlo calculations (MCNP4B) in solid water and in liquid water. The calculated and the measured TG-43 functions for solid water are in excellent agreement. In WT1, the calculated dose rate constant is 0.657+/-1% and the measured value is 0.672+/-7%. The calculated value for water is 0.692+/-1%. The comparison with the previous study (Med. Phys. 27(5) (2000)) shows a very good agreement for the dose rate constant. The agreement for the radial function is poorer. For the measurements, it can be due to the difference of TLD settings. For the calculations the discrepancy could come from the different cross-section data utilized in the different Monte Carlo codes. In conclusion, the dosimetric functions for the new iodine seed InterSource(103) have been determined using the MCNP4B Monte Carlo code and TLD measurement in solid water WT1. PMID:12406620

Reniers, B; Vynckier, S; Scalliet, P

2002-12-01

294

41 CFR 102-118.55 - What administrative procedures must my agency establish for payment of freight, household goods...  

Code of Federal Regulations, 2011 CFR

...payment of freight, household goods, or other transportation services? 102-118.55 Section 102-118...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION 118-TRANSPORTATION PAYMENT AND AUDIT Ordering and Paying...

2011-01-01

295

Investigation of the mechanism of the UV-induced palladium deposition process from thin solid palladium acetate films  

NASA Astrophysics Data System (ADS)

The nature of the UV-induced decomposition process of thin solid palladium acetate films was investigated on different substrate materials (Al 2O 3, quartz, polyimide) with a pulsed KrF ? excimer laser at ? = 248 nm and an incoherent Xe ?2 excimer source peaking at ? = 172 nm. Pulsed excimer laser deposition appears to be a process depending very much on the thermal properties of the substrate material and results always in discontinuous palladium layers. The decomposition caused by the incoherent excimer radiation is found to be independent of the thermal properties of the substrate material. It leads to smooth continuous palladium films. The transmission changes of the film during irradiation with incoherent VUV radiation were measured in the wavelength range 150 < ? < 400 nm after different exposure times. The change of transmission with exposure time is related to model calculations describing photolytic decomposition processes in thin solid films.

Esrom, Hilmar; Kogelschatz, Ulrich

1990-12-01

296

Cleanup Verification Package for the 118-F-1 Burial Ground  

SciTech Connect

This cleanup verification package documents completion of remedial action for the 118-F-1 Burial Ground on the Hanford Site. This burial ground is a combination of two locations formerly called Minor Construction Burial Ground No. 2 and Solid Waste Burial Ground No. 2. This waste site received radioactive equipment and other miscellaneous waste from 105-F Reactor operations, including dummy elements and irradiated process tubing; gun barrel tips, steel sleeves, and metal chips removed from the reactor; filter boxes containing reactor graphite chips; and miscellaneous construction solid waste.

E. J. Farris and H. M. Sulloway

2008-01-10

297

STS-118 Astronauts Rick Mastracchio and Clay Anderson Perform EVA  

NASA Technical Reports Server (NTRS)

As the construction continued on the International Space Station (ISS), STS-118 astronaut and mission specialist Rick Mastracchio was anchored on the foot restraint of the Canadarm2 as he participated in the third session of Extra Vehicular Activity (EVA) for the mission. Assisting Mastracchio was Expedition 15 flight engineer Clay Anderson (out of frame). During the 5 hour, 28 minute space walk, the two relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) truss to the Port 1 (P1) truss, installed a new transponder on P1 and retrieved the P6 transponder.

2007-01-01

298

Platinum-monolayer Electrocatalysts: Palladium Interlayer on IrCo Alloy Core Improves Activity in Oxygen-reduction Reaction  

SciTech Connect

We describe the synthesis and electrocatalytic properties of a new low-Pt electrocatalyst consisting of an IrCo core, a Pd interlayer, and a surface Pt monolayer, emphasizing the interlayer's role in improving electrocatalytic activity for the oxygen-reduction reaction on Pt in HClO{sub 4} solution. We prepared the IrCo alloys by decomposing, at 800 C, hexacyanometalate, KCoIr(CN){sub 6}, adsorbed on the carbon surfaces. The synthesis of Ir{sub 3}Co/C involved heating a mix of metal salts and carbon in hydrogen at 500 C. Thereafter, we placed a palladium and/or platinum monolayer on them via the galvanic displacement of an underpotentially deposited copper monolayer. The electrocatalysts were characterized using structural- and electrochemical-techniques. For PtML/PdML/IrCo/C, we observed a Pt mass activity of 1.18 A/mg{sub (Pt)} and the platinum-group-metals mass of 0.16 A/mg{sub (Pt, Pd, Ir)}. In comparison, without a Pd interlayer, i.e., Pt{sub ML}/IrCo/C, the activities of 0.15 A/mg{sub (Pt)} and 0.036 A/mg{sub (Pt, Pd, Ir)} were considerably lower. We consider that the palladium interlayer plays an essential role in achieving high catalytic activity by adjusting the electronic interaction of the platinum monolayer with the IrCo core, so that it accelerates the kinetics of adsorption and desorption of the intermediates of oxygen reduction. A similar trend was observed for Pt{sub ML}/Pd{sub ML} and Pt{sub ML} deposited on Ir{sub 3}Co/C alloy core. We used density functional theory to interpret the observed phenomena.

Gong, K.; Chen, W.-F.; Sasaki, K.; Su, D.; Vukmirovic, M.B.; Zhou, W.; Izzo, E.L.; Perez-Acosta, C.; Hirunsit, P.; Balbuena, P.B.; Adzic, R.R.

2010-11-15

299

On the corrosion behavior and biocompatibility of palladium-based dental alloys  

NASA Astrophysics Data System (ADS)

Palladium-based alloys have been used as dental restorative materials for about two decades with good clinical history. But there have been clinical case reports showing possible allergy effects from these alloys. The aim of this study was to characterize the corrosion behavior and mechanisms of several palladium-based dental alloys by potentiodynamic polarization methods, electrochemical impedance spectroscopy (EIS), and scanning Kelvin probe force microscopy/atomic force microscopy (SKPFM/AFM), and to evaluate their biocompatibility by a cell culture technique and an animal model. Using SKPFM/AFM and scanning electron microscopy, the Ru-enriched phase from the use of ruthenium as a grain-refining element was identified as being slightly more noble than the palladium solid solution matrix in a high-palladium alloy. Other secondary precipitates that exist in the microstructures of these high-palladium alloys have minimal differences in Volta potential compared to the matrix. For high-palladium alloys, corrosion is generally uniform due to the predominant palladium content in the different phases. Potentiodynamic polarization and EIS have shown that representative palladium-silver alloys have low corrosion tendency and high corrosion resistance, which are equivalent to a well-known high-noble gold-palladium alloy in simulated body fluid and oral environments. The palladium-silver alloys tested are resistant to chloride ion corrosion. Passivation and dealloying have been identified for all of the tested palladium-silver alloys. The great similarity in corrosion behavior among the palladium-silver alloys is attributed to their similar chemical compositions. The variation in microstructures of palladium-silver alloys tested does not cause significant difference in corrosion behavior. The corrosion resistance of these palladium-silver alloys at elevated potentials relevant to oral environment is still satisfactory. The release of elements from representative dental palladium alloys into cell culture media did not significantly affect the proliferation and viability of human fibroblast cells. Subcutaneous implantation of samples of one high-palladium alloy, one palladium-silver alloy and a gold alloy into mice did not cause any significant histological change in their skin and spleen. The presence of an oxide layer from dental laboratory processing of these alloys did not cause any adverse reactions from the cells or animals. The biocompatibility of the dental palladium-based alloys evaluated by the cell culture and animal models is satisfactory, suggesting that these alloys are safe for clinical usage.

Sun, Desheng

300

Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes  

E-print Network

Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

J. Kathawa; C. Fry; M. Thoennessen

2012-01-20

301

Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes  

SciTech Connect

Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

Kathawa, J.; Fry, C.; Thoennessen, M., E-mail: thoennessen@nscl.msu.edu

2013-01-15

302

Cu-Pd-Sn (Copper-Palladium-Tin)  

NASA Astrophysics Data System (ADS)

This document is part of Subvolume C3 'Non-Ferrous Metal Systems. Part 3: Selected Soldering and Brazing Systems' of Volume 11 'Ternary Alloy Systems - Phase Diagrams, Crystallographic and Thermodynamic Data critically evaluated by MSIT®' of Landolt-Börnstein - Group IV 'Physical Chemistry'. It provides data of the ternary system Copper-Palladium-Tin.

Materials Science International Team MSIT

303

Ni-Pd-Si (Nickel-Palladium-Silicon)  

NASA Astrophysics Data System (ADS)

This document is part of Subvolume C3 'Non-Ferrous Metal Systems. Part 3: Selected Soldering and Brazing Systems' of Volume 11 'Ternary Alloy Systems - Phase Diagrams, Crystallographic and Thermodynamic Data critically evaluated by MSIT®' of Landolt-Börnstein - Group IV 'Physical Chemistry'. It provides data of the ternary system Nickel-Palladium-Silicon.

Materials Science International Team MSIT

304

Silica-Supported Palladium-Based Catalysts for Clean Synthesis  

Microsoft Academic Search

Research into supported palladium complexes is described. The complexes are immobilised on porous silica supports using both grafting and templated sol-gel techniques. The resultant complexes are efficient catalysts for various C-C bond forming reactions, including Heck, Suzuki and allylic substitution. The catalysts are stable and can be easily recovered and reused, making them suitable for cleaner processing. Catalysts based on

Duncan J. Macquarrie; Battsengel Gotov; Stefan Toma

305

Atomic hydrogen desorption from thin palladium hydride films  

NASA Astrophysics Data System (ADS)

It has been proved that hydrogen atoms desorb from the surface of a decomposing thin palladium hydride film. A thin gold film deposited and sintered in situ was used as a selective adsorbent for atomic hydrogen. The TDMS (thermal desorption mass spectrometry) technique was applied to detect the adsorption of hydrogen on gold and to determine the amount adsorbed.

Lisowski, W.; Nowicka, E.; Wolfram, Z.; Du?, R.

1988-01-01

306

STRONTIUM AS AN EFFICIENT PROMOTER FOR SUPPORTED PALLADIUM HYDROGENATION CATALYSTS  

EPA Science Inventory

The effect of strontium promotion is studied for a series of supported palladium catalysts such as Pd/zeolite-?, Pd/Al2O3, Pd/SiO2, Pd/hydrotalcite and Pd/MgO. Strontium is found to be an effective promoter for enhancing the metal area, perce...

307

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

refining. The leading demand sector for PGMs continued to be catalysts to decrease harmful emissions in both light- and heavy-duty vehicles. PGMs are also used in the chemical sector as catalysts those of 2011 owing to economic concerns. Prices for platinum, palladium, rhodium, and ruthenium

308

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data uses include platinum-iridium alloys in prosthetic and biomedical devices. Salient Statistics,520 15,600 14,000 Iridium 896 926 1,450 1,810 1,500 Osmium 130 55 73 329 100 Exports, refined: Platinum

309

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

122 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data platinum-iridium alloys in prosthetic and biomedical devices. Salient Statistics--United States: 1996 1997,400 16,600 Iridium 1,810 1,860 1,950 2,270 2,640 Osmium NA 54 71 23 46 Exports: Platinum 12,700 23,000 14

310

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

124 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data uses include platinum-iridium alloys in prosthetic and biomedical devices. Salient Statistics,500 8,880 11,400 20,900 5,500 Iridium 1,860 1,950 2,270 2,700 3,500 Osmium 54 71 23 133 70 Exports

311

Palladium(III)-Catalyzed Fluorination of Arylboronic Acid Derivatives  

PubMed Central

A practical, palladium-catalyzed synthesis of aryl fluorides from arylboronic acid derivatives is presented. The reaction is operationally simple and amenable to multi-gram-scale synthesis. Evaluation of the reaction mechanism suggests a single-electron-transfer pathway, involving a Pd(III) intermediate that has been isolated and characterized. PMID:24040932

Tang, Pingping; Murphy, Jennifer M.; Ritter, Tobias

2013-01-01

312

Silver-palladium braze alloy recovered from masking materials  

NASA Technical Reports Server (NTRS)

Method for recovering powdered silver-palladium braze alloy from an acrylic spray binder and rubber masking adhesive used in spray brazing is devised. The process involves agitation and dissolution of masking materials and recovery of suspended precious metal particles on a filter.

Cierniak, R.; Colman, G.; De Carlo, F.

1966-01-01

313

Palladium buffer-layered high performance ionic polymer metal composites  

NASA Astrophysics Data System (ADS)

A new IPMC fabrication method—that is not a repetitive reduction processes—and a new supporting electrode material that is responsible for this procedure are described in this paper. A palladium metal, acting as a buffer layer, was deposited before plating the platinum electrode in order to articulate the surface morphology and the interfacial effect between the electrode and the membrane. The platinum layer was sequentially grown using an electroless chemical deposition on a palladium buffer layer on the polymer membrane. The surface morphology and conductivity of the electrode were enhanced by depositing a buffer layer. Under the same applied voltage, when compared to IPMCs without a buffer layer, the IPMCs with a palladium buffer layer showed a greater bending tendency and had a higher blocking force. The results also indicated that such IPMCs do not exhibit the back relaxation phenomenon under a sustained DC voltage. The amplitude of the transduction signal produced by the Pt/Pd IPMC shows much larger amplitude of the signal produced by the Pt IPMC. Thus, the IPMC with a palladium buffer layer has the potential for future applications as an actuator and transducer.

Kim, Sang-Mun; Kim, Kwang J.

2008-06-01

314

Palladium-Catalyzed Coupling Reactions of Aryl Chlorides  

Microsoft Academic Search

Collectively, palladium-catalyzed cou- pling reactions represent some of the most powerful and versatile tools avail- able to synthetic organic chemists. Their widespread popularity stems in part from the fact that they are gen- erally tolerant to a large number of functional groups, which allows them to be employed in a wide range of applications. However, for many years a major

Adam F. Littke; Gregory C. Fu

2002-01-01

315

Stereoselective palladium-catalyzed carbocyclization of allenic allylic carboxylates.  

PubMed

Palladium(0)-catalyzed reaction of allene-substituted allylic carboxylates 3-8 employing 2-5 mol % of Pd(dba)(2) in refluxing toluene leads to the carbocyclization and elimination of carboxylic acid to give bicyclo[4.3.0]nonadiene and bicyclo[5.3.0]decadiene derivatives (12-17). The carbon-carbon bond formation is stereospecific, occurring syn with respect to the leaving group. Addition of maleic anhydride as a ligand to the above-mentioned procedures changed the outcome of the reaction, and under these conditions 3-5 afforded cycloisomerized products 21-23. The experimental results are consistent with a mechanism involving oxidative addition of the allylic carboxylate to Pd(0) to give an electron-deficient (pi-allyl)palladium intermediate, followed by nucleophilic attack by the allene on the face of the pi-allyl opposite to that of the palladium atom. Furthermore, it was found that the Pd(dba)(2)-catalyzed cyclization of the trans-cycloheptene derivative (trans-8) can be directed to give either the trans-fused (trans-17) or the cis-fused (cis-17) ring system by altering the solvent. The former reaction proceeds via a nucleophilic trans-allene attack on the (pi-allyl)palladium intermediate, whereas the latter involves a syn-allene insertion into the allyl-Pd bond of the same intermediate. The products from the carbocylization undergo stereoselective Diels-Alder reactions to give stereodefined polycyclic systems in high yields. PMID:14611252

Franzén, Johan; Löfstedt, Joakim; Falk, Jennica; Bäckvall, Jan-E

2003-11-19

316

EXAFS Studies of Palladium Nanoparticles: Size Control and Hydrogenation  

E-print Network

,2 R. Isseroff,3 Y. Sun,4 M. H. Rafailovich,4 A. I. Frenkel2 1 Chemistry Department, Bar Ilan as the thiol concentration increased and stabilized at the 1:2 value of palladium/thiol ratio. In addition (with 3:1 ratio). Such bond length expansion is attributed to the defects caused by H2 adsorption

Frenkel, Anatoly

317

The melting point of palladium by a pulse heating method  

Microsoft Academic Search

The melting point of 99.95+% pure palladium was measured by means of a subsecond duration pulse heating technique. The average temperature at the melting point for three specimens was 1827 K with an average absolute deviation from the mean of 0.1 K. The total error in temperature is estimated to be not more than ±4 K.

A. P. Miiller; A. Cezairliyan

1981-01-01

318

Palladium-Catalyzed Synthesis of N-tert-Prenylindoles  

PubMed Central

Palladium-catalyzed N-tert-prenylation of indoles, tricarbonylchromium-activated indoles, and indolines that occur in high yields (up to 94%) with high tert-prenyl-to-n-prenyl selectivity (up to 12:1) are reported. PMID:23714013

Johnson, Kirsten F.; Van Zeeland, Ryan

2013-01-01

319

Freestanding palladium nanosheets with plasmonic and catalytic properties  

Microsoft Academic Search

Ultrathin metal films can exhibit quantum size and surface effects that give rise to unique physical and chemical properties. Metal films containing just a few layers of atoms can be fabricated on substrates using deposition techniques, but the production of freestanding ultrathin structures remains a significant challenge. Here we report the facile synthesis of freestanding hexagonal palladium nanosheets that are

Xiaoqing Huang; Shaoheng Tang; Xiaoliang Mu; Yan Dai; Guangxu Chen; Zhiyou Zhou; Fangxiong Ruan; Zhilin Yang; Nanfeng Zheng

2011-01-01

320

CATALYTIC COMBUSTION OF METHANE OVER PALLADIUM-BASED CATALYSTS  

Microsoft Academic Search

Palladium-based catalysts are widely applied in exhaust catalytic converter and catalytic combustion systems. The mechanism for methane oxidation on a Pd-based catalyst is complex. Catalyst activity is influenced by variations in the process pressure and temperature, by the gas mixture composition, by the type of support and various additives, and by pretreatment under reducing or oxidizing atmospheres. In this paper,

Dragos Ciuparu; Maxim R. Lyubovsky; Eric Altman; Lisa D. Pfefferle; Abhaya Datye

2002-01-01

321

Design of 118 MHz twelfth harmonic cavity of APS PAR  

SciTech Connect

Two radio frequency (RF) cavities are needed in the Positron Accumulator Ring (PAR) of the Advanced Photon Source. One is for the first harmonic frequency at 9.8 MHz, and the other is for the twelfth harmonic frequency at 118 MHz. This note reports on the design of the 118 MHz RF cavity. Computer models are used to find the mode frequencies, impedances, Q-factors, and field distributions in the cavity. The computer codes MAFIA, URMEL, and URMEL-T are useful tools which model and simulate the resonance characteristics of a cavity. These codes employ the finite difference method to solve Maxwell`s equations. MAFIA is a three-dimensional problem solver and uses square patches to approximate the inner surface of a cavity. URMEL and URMEL-T are two-dimensional problem solvers and use rectangular and triangular meshes, respectively. URMEL-T and MAFIA can handle problems with arbitrary dielectric materials located inside the boundary. The cavity employs a circularly cylindrical ceramic window to limit the vacuum to the beam pipe. The ceramic window used in the modeling will have a wall thickness of 0.9 cm. This wall thickness is not negligible in determining the resonant frequencies of the cavity. In the following, results of two- and three-dimensional modeling of the cavities using the URMEL-T and MAFIA codes are reported.

Kang, Y.W.; Kustom, R.L.; Bridges, J.F.

1992-10-22

322

Recoil studies in the reaction of {sup 12}C ions with the enriched isotope {sup 118}Sn  

SciTech Connect

The recoil properties of the product nuclei from the interaction of 2.2 GeV/nucleon {sup 12}C ions from Nuclotron of the Laboratory of High Energies, Joint Institute for Nuclear Research at Dubna with a {sup 118}Sn target have been studied via catcher foils method. The experimental data were analyzed using the mathematical formalism of the standard two-step vector model. The results for {sup 12}C ions are compared with those for deuterons and protons. Three different Los Alamos versions of the Quark-Gluon String Model were used for comparison with our experimental data.

Balabekyan, A. R., E-mail: balabekyan@ysu.am; Danagulyan, A. S.; Drnoyan, J. R. [Yerevan State University (Armenia); Demekhina, N. A. [JINR (Russian Federation); Hovhannisyan, G. H. [Yerevan State University (Armenia); Adam, J.; Kalinnikov, V. G.; Krivopustov, M. I.; Pronskikh, V. S.; Stegailov, V. I.; Solnyshkin, A. A.; Tsoupko-Sitnikov, V. M. [JINR (Russian Federation); Mashnik, S. G. [Los Alamos National Laboratory (United States); Gudima, K. K. [Academy of Sciences of Moldova, Institute of Applied Physics (Moldova, Republic of)

2010-07-15

323

Wet processing of palladium for use in the tritium facility at Westinghouse, Savannah River, SC. Preparation of palladium using the Mound Muddy Water process  

Microsoft Academic Search

Palladium used at Savannah River for tritium storage is currently obtained from a commercial source. In order to better understand the processes involved in preparing this material, Savannah River is supporting investigations into the chemical reactions used to synthesize this material and into the conditions necessary to produce palladium powder that meets their specifications. This better understanding may help to

D. P. Baldwin; D. S. Zamzow

1998-01-01

324

Palladium-catalyzed carbene migratory insertion using conjugated ene-yne-ketones as carbene precursors.  

PubMed

Palladium-catalyzed cross-coupling reactions between benzyl, aryl, or allyl bromides and conjugated ene-yne-ketones lead to the formation of 2-alkenyl-substituted furans. This novel coupling reaction involves oxidative addition, alkyne activation-cyclization, palladium carbene migratory insertion, ?-hydride elimination, and catalyst regeneration. Palladium (2-furyl)carbene is proposed as the key intermediate, which is supported by DFT calculations. The palladium carbene character of the key intermediate is validated by three aspects, including bond lengths, Wiberg bond order indices, and molecular orbitals, by comparison to those reported for stable palladium carbene species. Computational studies also revealed that the rate-limiting step is ene-yne-ketone cyclization, which leads to the formation of the palladium (2-furyl)carbene, while the subsequent carbene migratory insertion is a facile process with a low energy barrier (<5 kcal/mol). PMID:23947689

Xia, Ying; Qu, Shuanglin; Xiao, Qing; Wang, Zhi-Xiang; Qu, Peiyuan; Chen, Li; Liu, Zhen; Tian, Leiming; Huang, Zhongxing; Zhang, Yan; Wang, Jianbo

2013-09-11

325

Palladium-Based Electrocatalysts for Alcohol Oxidation in Direct Alcohol Fuel Cells  

NASA Astrophysics Data System (ADS)

Palladium is emerging as an attractive replacement for platinum in a number of electrochemical applications, including lowtemperature fuel cells, electrolyzers and sensors. Palladium is more abundant in nature and less expensive than platinum.1 However, cost-associated issues are not the main driving force behind the increasing interest in palladium as it remains a rare noble metal whose introduction for a broad technological use would lead to an irreversible increase in its market price.

Bianchini, C.

326

Palladium doped manganese dioxide catalysts for low temperature carbon monoxide oxidation  

Microsoft Academic Search

Nano-sized palladium doped manganese dioxide catalysts with varying compositions were prepared by the co-precipitation method. Palladium doped manganese dioxide catalysts show markedly enhanced CO oxidation activity, and CO conversion even at 35°C. Strong interaction occurs between palladium and manganese dioxide which results in high catalytic activity and total CO conversion occurs at a lower temperature. Activity test carried out at

A. V. Salker; R. K. Kunkalekar

2009-01-01

327

Electrochromism Properties of Palladium Doped Tungsten-Oxide Thin Films Prepared with RF Reactive Sputtering  

NASA Astrophysics Data System (ADS)

Palladium doped tungsten oxide thin films were prepared by RF reactive sputtering in a mixture of argon and oxygen at room temperature. XRD patterns indicated that these films were amorphous. SEM imaging indicated a smaller grain size of palladium doped thin film compared with that of undoped tungsten oxide thin film. With electrochromism, palladium doped tungsten oxide exhibited a reverse optical modulation with respect to the applied potential.

Yabumoto, Taihei; Iwai, Yuki; Miura, Noboru; Matsumoto, Setsuko; Nakano, Ryotaro; Matsumoto, Hironaga

328

Aqueous-Phase Palladium-Catalyzed Coupling. A Green Chemistry Laboratory Experiment  

NASA Astrophysics Data System (ADS)

An upper-level inorganic/organic experiment presents important concepts in modern green chemistry. A water-soluble modified triphenylphosphine ligand is prepared and used to prepare a water-soluble palladium catalyst. The palladium catalyst is formed in situ and used for the aqueous, homogenous, palladium-catalyzed cross-coupling reaction of iodobenzene and diethyl phosphite. The product is diethyl phenylphosphonate.

Featured on the Cover

Harper, Brandy A.; Chance Rainwater, J.; Birdwhistell, Kurt; Knight, D. Andrew

2002-06-01

329

Banana peel extract mediated novel route for the synthesis of palladium nanoparticles  

Microsoft Academic Search

Bio-inspired palladium nanoparticles were synthesized by using banana peel extract (BPE), a non-toxic eco-friendly material. Boiled, crushed, acetone precipitated, air-dried peel powder was used to reduce palladium chloride. The palladium nanoparticles were characterized by using UV–Visible spectroscopy, scanning electron microscope-energy dispersive spectra (SEM-EDS) and X-ray diffraction (XRD) analysis. Dynamic light scattering (DLS) studies revealed the average size of nanoparticles to

Ashok Bankar; Bhagyashree Joshi; Ameeta Ravi Kumar; Smita Zinjarde

2010-01-01

330

Carbon-trifluoromethyl bond forming reactions and palladium-catalyzed cyanation of (hetero)aryl halides  

E-print Network

Chapter 1 Nucleophilic trifluoromethyl sources were systematically examined in stoichiometric palladium experiments to determine the most efficient class of reagents for transmetallation. In conjunction with reductive ...

Senecal, Todd D. (Todd Dale)

2013-01-01

331

Optical properties and surface morphology studies of palladium contacts on mercuric iodide single crystals  

SciTech Connect

Palladium is chemically suitable for electric contacts on mercuric iodide detectors for photon and nuclear radiation detection, so the understanding of palladium contacts is important for fundamental and practical scientific purposes. A study has been conducted on the surface morphology of evaporated contacts using Atomic Force Microscopy (AFM) and optical transmission and reflection. Evaporated palladium coatings are typically nonuniform and may deposit selectively on mercuric iodide surface defects. Reflection measurements show that coating thickness and surface treatment affect intensity, position and shape of a reflected peak characteristic of the mercuric iodide structure. Results indicate that the band gap energy in the surface of the mercuric iodide is lowered by palladium contacts.

George, M.A.; Azoulay, M.; Burger, A.; Biao, Y.; Silberman, E. [Fisk Univ., Nashville, TN (United States). Dept. of Physics; Nason, D. [EG and G Energy Measurements, Inc., Goleta, CA (United States). Santa Barbara Operations

1993-05-01

332

METHOD TO TEST ISOTOPIC SEPARATION EFFICIENCY OF PALLADIUM PACKED COLUMNS  

SciTech Connect

The isotopic effect of palladium has been applied in different ways to separate hydrogen isotopes for many years. At Savannah River Site palladium deposited on kieselguhr (Pd/k) is used in a thermal cycling absorption process (TCAP) to purify tritium for over ten years. The need to design columns for different throughputs and the desire to advance the performance of TCAP created the need to evaluate different column designs and packing materials for their separation efficiency. In this work, columns with variations in length, diameter and metal foam use, were tested using an isotope displacement method. A simple computer model was also developed to calculate the number of theoretical separation stages using the test results. The effects of column diameter, metal foam and gas flow rate were identified.

Heung, L; Gregory Staack, G; James Klein, J; William Jacobs, W

2007-06-27

333

Effect of Lactobacillus salivarius Bacteriocin Abp118 on the Mouse and Pig Intestinal Microbiota  

PubMed Central

Lactobacilli are Gram-positive bacteria that are a subdominant element in the human gastrointestinal microbiota, and which are commonly used in the food industry. Some lactobacilli are considered probiotic, and have been associated with health benefits. However, there is very little culture-independent information on how consumed probiotic microorganisms might affect the entire intestinal microbiota. We therefore studied the impact of the administration of Lactobacillus salivarius UCC118, a microorganism well characterized for its probiotic properties, on the composition of the intestinal microbiota in two model animals. UCC118 has anti-infective activity due to production of the bacteriocin Abp118, a broad-spectrum class IIb bacteriocin, which we hypothesized could impact the microbiota. Mice and pigs were administered wild-type (WT) L. salivarius UCC118 cells, or a mutant lacking bacteriocin production. The microbiota composition was determined by pyrosequencing of 16S rRNA gene amplicons from faeces. The data show that L. salivarius UCC118 administration had no significant effect on proportions of major phyla comprising the mouse microbiota, whether the strain was producing bacteriocin or not. However, L. salivarius UCC118 WT administration led to a significant decrease in Spirochaetes levels, the third major phylum in the untreated pig microbiota. In both pigs and mice, L. salivarius UCC118 administration had an effect on Firmicutes genus members. This effect was not observed when the mutant strain was administered, and was thus associated with bacteriocin production. Surprisingly, in both models, L. salivarius UCC118 administration and production of Abp118 had an effect on Gram-negative microorganisms, even though Abp118 is normally not active in vitro against this group of microorganisms. Thus L. salivarius UCC118 administration has a significant but subtle impact on mouse and pig microbiota, by a mechanism that seems at least partially bacteriocin-dependent. PMID:22363561

Riboulet-Bisson, Eliette; Sturme, Mark H. J.; Jeffery, Ian B.; O'Donnell, Michelle M.; Neville, B. Anne; Forde, Brian M.; Claesson, Marcus J.; Harris, Hugh; Gardiner, Gillian E.; Casey, Patrick G.; Lawlor, Peadar G.; O'Toole, Paul W.; Ross, R. Paul

2012-01-01

334

Atomic Mass and Nuclear Binding Energy for Pd-171 (Palladium)  

NASA Astrophysics Data System (ADS)

This document is part of the Supplement containing the complete sets of data of Subvolume A `Nuclei with Z = 1 - 54' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms'. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Pd-171 (Palladium, atomic number Z = 46, mass number A = 171).

Sukhoruchkin, S. I.; Soroko, Z. N.

335

A silver-palladium thick film for aluminum nitride substrate  

Microsoft Academic Search

A silver-palladium thick film conductor for aluminum nitride (AlN) substrate has been developed. This conductor film on AlN ceramics had low sheet resistivity, high adhesion strength and good wettability with Pb-Sn solder. The frit powder of lead borosilicate glass was used as inorganic binders to enhance the adhesion between the conductor and ceramics. After sintering the conductor film connected with

Dongfeng Zheng; Minbo Tian; Yingqian Wang; Wei He

2003-01-01

336

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

124 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Iridium 2,700 3,110 2,100 2,200 3,900 Osmium 133 77 36 53 70 Exports: Platinum 25,000 31,300 27,800 22 6,220 1,070 Iridium 501 21 501 187 108 Prepared by Henry E. Hilliard [(703) 648-4970, hhilliar

337

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data use of PGM is in cancer chemotherapy. Other medical uses include platinum-iridium alloys in prosthetic,600 9,650 14,400 13,400 14,500 Ruthenium 7,520 15,600 11,500 9,230 9,500 Iridium 1,450 1,810 1,860 2

338

Biaryl Phosphine Ligands in Palladium-Catalyzed Amination  

PubMed Central

Palladium-catalyzed amination of aryl halides has undergone rapid development in the last 12 years. This has been largely driven by implementation of new classes of ligands. Biaryl phosphines have proven to provide especially active catalysts in this context. This review discusses the applications that these catalysts have found in C-N cross-coupling in heterocycle synthesis, pharmaceuticals, materials science and natural product synthesis. PMID:18663711

Surry, David S.

2012-01-01

339

MASKER MASKER TARGET TARGET TARGET  

E-print Network

from a large speech database (Ives et al,2005). The original speech is from one speaker Probabilitycorrect -6 dB 0 dB Listeners were presented with two phrases of concurrent speech syllables. The masker syllables coincided with the second and third target syllables. The speech syllables were taken

Ives, D. Timothy

340

Methane ignition catalyzed by in situ generated palladium nanoparticles  

SciTech Connect

Catalytic ignition of methane over the surfaces of freely-suspended and in situ generated palladium nanoparticles was investigated experimentally and numerically. The experiments were conducted in a laminar flow reactor. The palladium precursor was a compound (Pd(THD){sub 2}, THD: 2,2,6,6-tetramethyl-3,5-heptanedione) dissolved in toluene and injected into the flow reactor as a fine aerosol, along with a methane-oxygen-nitrogen mixture. For experimental conditions chosen in this study, non-catalytic, homogeneous ignition was observed at a furnace temperature of {proportional_to}1123 K, whereas ignition of the same mixture with the precursor was found to be {proportional_to}973 K. In situ production of Pd/PdO nanoparticles was confirmed by scanning mobility, transmission electron microscopy and X-ray photoelectron spectroscopy analyses of particles collected at the reactor exit. The catalyst particle size distribution was log-normal. Depending on the precursor loading, the median diameter ranged from 10 to 30 nm. The mechanism behind catalytic ignition was examined using a combined gas-phase and gas-surface reaction model. Simulation results match the experiments closely and suggest that palladium nanocatalyst significantly shortens the ignition delay times of methane-air mixtures over a wide range of conditions. (author)

Shimizu, T.; Abid, A.D.; Poskrebyshev, G.; Wang, H. [Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089 (United States); Nabity, J.; Engel, J.; Yu, J. [TDA Research, Inc., 12345 W. 52nd Ave, Wheat Ridge, CO 80033 (United States); Wickham, D. [Reaction Systems, LLC, 19039 E. Plaza Drive, Suite 290, Parker, CO 80134 (United States); Van Devener, B.; Anderson, S.L. [Department of Chemistry, University of Utah, Salt Lake City, UT 84112 (United States); Williams, S. [Air Force Research Laboratory, Mail Stop RZA, 1950 Fifth Street, WPAFB, OH 45433 (United States)

2010-03-15

341

Hexaacetato calix(6)arene as the novel extractant for palladium.  

PubMed

A novel method is proposed for the solvent extraction of palladium. A superamolecular compound, hexaacetato calix(6)arene in low concentration in toluene quantitatively extracts microgram concentration of palladium at pH 7.5. It can be stripped from the organic phase with 2 M nitric acid and determined spectrophotometrically as its stannous chloride complex at 635 nm. The probable composition of the extracted species is Pd(HR)(2)Cl. As low as 1x10(-3) M of extractant is adequate for quantitative extraction. Toluene was the best diluent. With nitric and perchloric acid (1.5-3 M) the stripping was complete. Palladium was separated in large ratios from alkali and alkaline earths (1:50). The main group elements were tolerated in higher ratios (1:25), but ions like zinc, cadmium, iron, nickel, platinium, thorium, vanadium and molydenum were tolerated at low concentrations (1:1). The ions showing strong interference were copper, chromium. The relative standard deviation is +/-1.1%. PMID:18966909

Mathew, V J; Khopkar, S M

1997-10-01

342

Recovery of hydrogen from impurities using a palladium membrane reactor  

SciTech Connect

One of the important steps in processing the exhaust from a fusion reactor is recovering tritium which is incorporated into molecules such as water and methane. One device which may prove to be very effective for this purpose is a palladium membrane reactor. This is a reactor which incorporates a Pd/Ag membrane in the reactor geometry. Reactions such as water gas shift, steam reforming and methane cracking can be carried out over the reactor catalyst, and the product hydrogen can be simultaneously removed from the reacting mixture. Because product is removed, greater than usual conversions can be obtained. In addition ultrapure hydrogen is produced, eliminating the need for an additional processing step. A palladium membrane reactor has been built and tested with three different catalysts. Initial results with a Ni-based catalyst show that it is very effective at promoting all three reactions listed above. Under the proper conditions, hydrogen recoveries approaching 100% have been observed. This study serves to experimentally validate the palladium membrane reactor as potentially important tool for fusion fuel processing.

Willms, R.S. [Los Alamos National Lab., NM (United States); Okuno, K. [Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan)

1993-12-01

343

Polychlorinated biphenyl (118) activates osteoclasts and induces bone resorption in goldfish.  

PubMed

To analyze the effect of polychlorinated biphenyl (PCB) 118 on fish bone metabolism, we examined osteoclastic and osteoblastic activities, as well as plasma calcium levels, in the scales of PCB (118)-injected goldfish. In addition, effect of PCB (118) on osteoclasts and osteoblasts was investigated in vitro. Immature goldfish, in which the endogenous effects of sex steroids are negligible, were used. PCB (118) was solubilized in dimethyl sulfoxide at a concentration of 10 ppm. At 1 and 2 days after PCB (118) injection (100 ng/g body weight), both osteoclastic and osteoblastic activities, and plasma calcium levels were measured. In an in vitro study, then, both osteoclastic and osteoblastic activities as well as each marker mRNA expression were examined. At 2 days, scale osteoclastic activity in PCB (118)-injected goldfish increased significantly, while osteoblastic activity did not change significantly. Corresponding to osteoclastic activity, plasma calcium levels increased significantly at 2 days after PCB (118) administration. Osteoclastic activation also occurred in the marker enzyme activities and mRNA expressions in vitro. Thus, we conclude that PCB (118) disrupts bone metabolism in goldfish both in vivo and in vitro experiments. PMID:23247518

Yachiguchi, Koji; Matsumoto, Noriko; Haga, Yuki; Suzuki, Motoharu; Matsumura, Chisato; Tsurukawa, Masahiro; Okuno, Toshihiro; Nakano, Takeshi; Kawabe, Kimi; Kitamura, Kei-ichiro; Toriba, Akira; Hayakawa, Kazuichi; Chowdhury, Vishwajit S; Endo, Masato; Chiba, Atsuhiko; Sekiguchi, Toshio; Nakano, Masaki; Tabuchi, Yoshiaki; Kondo, Takashi; Wada, Shigehito; Mishima, Hiroyuki; Hattori, Atsuhiko; Suzuki, Nobuo

2014-05-01

344

26 CFR 1.118-2 - Contribution in aid of construction.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

2013-04-01

345

26 CFR 1.118-2 - Contribution in aid of construction.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

2011-04-01

346

26 CFR 1.118-2 - Contribution in aid of construction.  

...2014-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

2014-04-01

347

26 CFR 1.118-2 - Contribution in aid of construction.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

2010-04-01

348

26 CFR 1.118-2 - Contribution in aid of construction.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Contribution in aid of construction. 1.118-2 Section...Income § 1.118-2 Contribution in aid of construction. (a) Special rule... (i) The amount is a contribution in aid of construction under paragraph (b)...

2012-04-01

349

Cleanup Verification Package for the 118-F-5 PNL Sawdust Pit  

SciTech Connect

This cleanup verification package documents completion of remedial action, sampling activities, and compliance with cleanup criteria for the 118-F-5 Burial Ground, the PNL (Pacific Northwest Laboratory) Sawdust Pit. The 118-F-5 Burial Ground was an unlined trench that received radioactive sawdust from the floors of animal pens in the 100-F Experimental Animal Farm.

L. D. Habel

2008-05-20

350

20 CFR 703.118 - Agreement to be bound by report.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Agreement to be bound by report. 703.118 Section 703...Carriers § 703.118 Agreement to be bound by report. Every applicant...the carrier's agreement to become so bound. It shall be no defense to this...

2010-04-01

351

19 CFR 207.118 - Role of the General Counsel in advising the Commission.  

Code of Federal Regulations, 2010 CFR

...Customs Duties 3 2010-04-01 2010-04-01 false Role of the General Counsel in advising the Commission. 207.118...Issued During Panel and Committee Proceedings § 207.118 Role of the General Counsel in advising the Commission. The...

2010-04-01

352

25 CFR 11.118 - What are the jurisdictional limitations of the Court of Indian Offenses?  

Code of Federal Regulations, 2010 CFR

25 Indians 1 2010-04-01 2010-04-01 false What are the jurisdictional limitations of the Court of Indian Offenses? 11.118 Section 11.118 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAW AND...

2010-04-01

353

41 CFR 102-118.605 - What if a TSP disagrees with the Notice of Indebtedness?  

Code of Federal Regulations, 2010 CFR

41 ? Public Contracts and Property Management ? 3 ? 2010-07-01 ? 2010-07-01 ? false ? What if a TSP disagrees with the Notice of Indebtedness? ? 102-118.605 ? Section 102-118.605 ? Public Contracts and Property Management ? Federal Property Management Regulations System (Continued) ?...

2010-07-01

354

New Palladium-Catalyzed Approaches to Heterocycles and Carbocycles  

SciTech Connect

The tert-butylimines of o-(1-alkynyl)benzaldehydes and analogous pyridinecarbaldehydes have been cyclized under very mild reaction conditions in the presence of I{sub 2}, ICl, PhSeCl, PhSCl and p-O{sub 2}NC{sub 6}H{sub 4}SCl to give the corresponding halogen-, selenium- and sulfur-containing disubstituted isoquinolines and naphthyridines, respectively. Monosubstituted isoquinolines and naphthyridines have been synthesized by the metal-catalyzed ring closure of these same iminoalkynes. This methodology accommodates a variety of iminoalkynes and affords the anticipated heterocycles in moderate to excellent yields. The Pd(II)-catalyzed cyclization of 2-(1-alkynyl)arylaldimines in the presence of various alkenes provides an efficient way to synthesize a variety of 4-(1-alkenyl)-3-arylisoquinolines in moderate to excellent yields. The introduction of an ortho-methoxy group on the arylaldimine promotes the Pd-catalyzed cyclization and stabilizes the resulting Pd(II) intermediate, improving the yields of the isoquinoline products. Highly substituted naphthalenes have been synthesized by the palladium-catalyzed annulation of a variety of internal alkynes, in which two new carbon-carbon bonds are formed in a single step under relatively mild reaction conditions. This method has also been used to synthesize carbazoles, although a higher reaction temperature is necessary. The process involves arylpalladation of the alkyne, followed by intramolecular Heck olefination and double bond isomerization. This method accommodates a variety of functional groups and affords the anticipated highly substituted naphthalenes and carbazoles in good to excellent yields. Novel palladium migratiodarylation methodology for the synthesis of complex fused polycycles has been developed, in which one or more sequential Pd-catalyzed intramolecular migration processes involving C-H activation are employed. The chemistry works best with electron-rich aromatics, which is in agreement with the idea that these palladium-catalyzed C-H activation reactions parallel electrophilic aromatic substitution. A relatively efficient synthesis of cyclopropanes has been developed using palladium-catalyzed C-H activation chemistry, in which two new carbon-carbon bonds are formed in a single step. This method involves the palladium-catalyzed activation of relatively unreactive C-H bonds, and provides a very efficient way to synthesize cyclopropapyrrolo[1,2-a]indoles, analogues of the mitomycin antibiotics.

Qinhua Huang

2004-12-19

355

Palladium-Catalyzed Intramolecular Carbopalladation/Cyclization Cascade: Access to Polycyclic N-Fused Heterocycles  

PubMed Central

An efficient palladium-catalyzed intramolecular carbopalladation/cyclization cascade toward tetra- and pentacyclic N-fused heterocycles has been developed. This transformation proceeds via the palladium-catalyzed coupling of aryl halides with internal propargylic esters or ethers followed by the 5-endo-dig cyclization leading to polycyclic pyrroloheterocycles in moderate to excellent yields. PMID:21058673

Chernyak, Dmitri

2011-01-01

356

ALLERGIC RESPONSE TO PLATINUM AND PALLADIUM COMPLEXES DETERMINATION OF NO-EFFECT LEVEL  

EPA Science Inventory

Rabbits, guinea pigs and mice were subcutaneously injected with PtSO4 (with and without NH4Cl) and PdSO4 (with and without NH4Cl) in an attempt to sensitize the animals to platinum or palladium. No allergic induction was found. No allergic induction to platinum or palladium was f...

357

Enhanced regioselectivity in palladium-catalysed asymmetric methoxycarbonylation of styrene using phosphetanes as chiral ligands  

E-print Network

1 Enhanced regioselectivity in palladium-catalysed asymmetric methoxycarbonylation of styrene using. ____________________________________________________________________________________________________________ The palladium-catalysed asymmetric methoxycarbonylation of styrene has been investigated for the first time%. ____________________________________________________________________________________________________________ Over the past two decades, the asymmetric methoxycarbonylation of styrene (equation 1) has been

Paris-Sud XI, Université de

358

Fast detection of hydrogen with nano fiber tapers coated with ultra thin palladium layers  

Microsoft Academic Search

We report a miniature hydrogen sensor that consists of a subwavelength diameter tapered optical fiber coated with an ultra thin palladium film. The optical properties of the palladium layer changes when the device is exposed to hydrogen. Consequently, the absorption of the evanescent waves also changes. The sensor was tested in a simple light transmission measurement setup that consisted of

Joel Villatoro; David Monzón-Hernández

2005-01-01

359

Palladium extraction from nitrate solutions by tertiary amines and quaternary ammonium salts  

Microsoft Academic Search

The mechanism of palladium extraction by trilaurylamine and trilaurylmethylammonium nitrate from nitric acid solutions was studied. The composition of the extracted compounds was determined by the Job method as well as by organic phase saturation. Both reagents were found to extract palladium as Am2Pd\\/NO3\\/4 \\/Am=ammonium cation\\/.

P. Tarap?ík; V. Mikulaj

1986-01-01

360

Palladium-catalyzed intramolecular carbopalladation/cyclization cascade: access to polycyclic N-fused heterocycles.  

PubMed

An efficient palladium-catalyzed intramolecular carbopalladation/cyclization cascade toward tetra- and pentacyclic N-fused heterocycles has been developed. This transformation proceeds via the palladium-catalyzed coupling of aryl halides with internal propargylic esters or ethers followed by the 5-endo-dig cyclization leading to polycyclic pyrroloheterocycles in moderate to excellent yields. PMID:21058673

Chernyak, Dmitri; Gevorgyan, Vladimir

2010-12-01

361

Palladium-catalyzed carbonylation of o-iodoanilines for synthesis of isatoic anhydrides.  

PubMed

A novel palladium-catalyzed oxidative double carbonylation of o-iodoanilines for the synthesis of isatoic anhydrides has been developed. The reaction employs readily available o-iodoanilines as the starting materials and proceeds under mild conditions. For extension, palladium-catalyzed oxidative carbonylation of anthranilic acids was developed for the synthesis of substituted isatoic anhydrides in high to excellent yields. PMID:24720706

Gao, Sha; Chen, Ming; Zhao, Mi-Na; Du, Wei; Ren, Zhi-Hui; Wang, Yao-Yu; Guan, Zheng-Hui

2014-05-01

362

Experimental study on cold fusion using deuterium gas and deuterium ion beam with palladium  

Microsoft Academic Search

A series of experiments using deuterium gas and low energy deuteron beam with palladium has been designed at Mississippi State University to allow for the observation, if it exists, of cold fusion. Three experiments were performed. One involved the diffusion transient of deuterium gas into palladium. The gas was cooled by liquid nitrogen, and its temperature was permitted to rise

Albert G. Gu; Robert K. F. Teng; Mark S. Miller; Jeff Sprouse

1990-01-01

363

An adiabatic type of palladium membrane reactor for coupling endothermic and exothermic reactions  

Microsoft Academic Search

Palladium can play an interesting role as a catalytic membrane, that is, a hydrogen separative and catalytically active wall. Utilizing this function, a palladium membrane reactor capable of working under an adiabatic condition was designed in this study for coupling two conjugated reactions. On one side of the membrane, dehydrogenation of cyclohexane as a model takes place in the catalyst-packed

Naotsugu Itoh; Tian-Hua Wu

1997-01-01

364

Domino allylic amination/Sonogashira/heterocyclisation reactions: palladium-catalysed three-component synthesis of pyrrolesw  

E-print Network

in fair to good yields in the presence of palladium and copper catalysts under mild reaction conditions. The palladium species acts either as a Sonogashira catalyst9 or as a Lewis acid promoter for the 5-endo dig carbon­iodine bonds as dielectrophile was prepared from buta-2,3-dienoic acid 1 by addition of iodine

Paris-Sud XI, Université de

365

Palladium-catalyzed carboiodination of alkenes: carbon-carbon bond formation with retention of reactive functionality.  

PubMed

We report a palladium-catalyzed carbon-carbon bond-forming reaction between aryl iodides and alkenes. In contrast to traditional cross-coupling reactions, two new bonds are formed, and all of the atoms in the starting materials are incorporated into the product. The use of a palladium catalyst with bulky phosphine ligands is found to be crucial for reactivity. PMID:21265523

Newman, Stephen G; Lautens, Mark

2011-02-16

366

The electronic spectra and structure of palladium(II) molecular complexes and clusters  

NASA Astrophysics Data System (ADS)

The electronic absorption spectra of palladium(II) diacetate (PDA) complexes with phosphines and sulfides (D) with the composition Pd(OAc)2 · 2D (1: 2) contain an intense charge transfer band at ?max ˜ 300 nm (? ˜ 15 000) and do not absorb in the region of 400 nm. Polynuclear compounds such as PDA trimer [Pd(OAc)2]3, trimer complexes with D, and four- and six-membered palladium metallocyclic compounds formed in the interaction of PDA with mercaptans absorb at longer wavelengths. The electronic absorption spectra of all the palladium polynuclear compounds (clusters) contain bands at ?max ˜ 400 nm (? ˜ 1000). The appearance of these bands in the spectra of palladium clusters is evidence of the formation of chemical bonds between neighboring Pd atoms, although Pd…Pd distances substantially exceed the sum of the covalent radii of palladium atoms.

Romm, I. P.; Malkov, A. A.; Lebedev, S. A.; Levashova, V. V.; Buslaeva, T. M.

2011-02-01

367

Analysis of Central Events in the Interactions of Relativistic Heavy Ions with Emulsion Nuclei at 118.4 GeV  

SciTech Connect

Data on the multiplicity of the secondary produced particles in the central events from the interactions of 32S with AgBr nuclei at 118.4 GeV. A different selection criteria of the central collision in heavy ion interactions was investigated. The multiplicity distributions of the different produced shower particles (mainly pions) in the central events for each criteria was studied. The multiplicity distributions of the target fragments emitted in the central events was fitted by a Gaussian distribution. The target analysis of the experimental data shows agreement with the limiting fragmentation hypothesis.

EL-Falaky, E. [Physics Department, Faculty of Education, Suez Canal University, El-Suez (Egypt)

2007-02-14

368

Mercaptobenzoic acid-palladium(0) complexes as active catalysts for S-benzylation with benzylic alcohols via (?(3)-benzyl)palladium(II) cations in water.  

PubMed

Mercaptobenzoic acid-palladium(0) complexes show high catalytic activity for S-benzylation with benzylic alcohols via the (?(3)-benzyl)palladium(II) cation in water. Notably, these palladium(0) complexes could play an important role in formation of active (?(3)-benzyl)palladium(II) cation complexes followed by S-benzylation. Hammett studies on the rate constants of S-benzylation by various substituted alcohols show good correlation between log(kX/kH) and the ?(+) value of the respective substituents. From the slope, negative ? values are obtained, suggesting that there is a build-up of positive charge in the transition state. Water plays an important role in the catalytic system for sp(3) C-O bond activation and stabilization of the activated Pd(II) cation species. The catalytic system can be performed using only 2.5 mol% Pd2(dba)3 without the phosphine ligand or other additives. PMID:24986042

Hikawa, Hidemasa; Azumaya, Isao

2014-08-21

369

41 CFR 102-118.420 - Can the Administrator of General Services waive the postpayment auditing provisions of this subpart?  

Code of Federal Regulations, 2010 CFR

...Can the Administrator of General Services waive the postpayment auditing provisions of this subpart? 102-118.420 Section 102-118...the Administrator of General Services waive the postpayment auditing provisions of this subpart? Yes, in certain...

2010-07-01

370

21 CFR 118.11 - Registration requirements for shell egg producers covered by the requirements of this part.  

Code of Federal Regulations, 2011 CFR

... 118.11 Section 118.11 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT...AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION PRODUCTION...week beginning May 10, 2010. This Web site is available from...

2011-04-01

371

21 CFR 118.11 - Registration requirements for shell egg producers covered by the requirements of this part.  

Code of Federal Regulations, 2010 CFR

... 118.11 Section 118.11 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT...AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION PRODUCTION...week beginning May 10, 2010. This Web site is available from...

2010-04-01

372

Pterocarpanquinone LQB-118 Induces Apoptosis in Leishmania (Viannia) braziliensis and Controls Lesions in Infected Hamsters.  

PubMed

Previous results demonstrate that the hybrid synthetic pterocarpanquinone LQB-118 presents antileishmanial activity against Leishmania amazonensis in a mouse model. The aim of the present study was to use a hamster model to investigate whether LQB-118 presents antileishmanial activity against Leishmania (Viannia) braziliensis, which is the major Leishmania species related to American tegumentary leishmaniasis. The in vitro antileishmanial activity of LQB-118 on L. braziliensis was tested on the promastigote and intracellular amastigote forms. The cell death induced by LQB-118 in the L. braziliensis promastigotes was analyzed using an annexin V-FITC/PI kit, the oxidative stress was evaluated by 2',7'-dichlorodihydrofluorescein diacetate (H2DCFDA) and the ATP content by luminescence. In situ labeling of DNA fragments by terminal deoxyribonucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) was used to investigate apoptosis in the intracellular amastigotes. L. braziliensis-infected hamsters were treated from the seventh day of infection with LQB-118 administered intralesionally (26 µg/kg/day, three times a week) or orally (4,3 mg/kg/day, five times a week) for eight weeks. LQB-118 was active against the L. braziliensis promastigotes and intracellular amastigotes, producing IC50 (50% inhibitory concentration) values of 3,4±0,1 and 7,5±0,8 µM, respectively. LQB-118 induced promastigote phosphatidylserine externalization accompanied by increased reactive oxygen species production and ATP depletion. Intracellular amastigote DNA fragmentation was also observed, without affecting the viability of macrophages. The treatment of L. braziliensis-infected hamsters with LQB-118, either orally or intralesionally, was effective in the control of lesion size, parasite load and increase intradermal reaction to parasite antigen. Taken together, these results show that the antileishmanial effect of LQB-118 extends to L. braziliensis in the hamster model, involves the induction of parasite apoptosis and shows promising therapeutic option by oral or local routes in leishmaniasis. PMID:25340550

Costa, Luciana; Pinheiro, Roberta O; Dutra, Patrícia M L; Santos, Rosiane F; Cunha-Júnior, Edézio F; Torres-Santos, Eduardo C; da Silva, Alcides J M; Costa, Paulo R R; Da-Silva, Silvia A G

2014-01-01

373

Pterocarpanquinone LQB-118 Induces Apoptosis in Leishmania (Viannia) braziliensis and Controls Lesions in Infected Hamsters  

PubMed Central

Previous results demonstrate that the hybrid synthetic pterocarpanquinone LQB-118 presents antileishmanial activity against Leishmania amazonensis in a mouse model. The aim of the present study was to use a hamster model to investigate whether LQB-118 presents antileishmanial activity against Leishmania (Viannia) braziliensis, which is the major Leishmania species related to American tegumentary leishmaniasis. The in vitro antileishmanial activity of LQB-118 on L. braziliensis was tested on the promastigote and intracellular amastigote forms. The cell death induced by LQB-118 in the L. braziliensis promastigotes was analyzed using an annexin V-FITC/PI kit, the oxidative stress was evaluated by 2?,7?-dichlorodihydrofluorescein diacetate (H2DCFDA) and the ATP content by luminescence. In situ labeling of DNA fragments by terminal deoxyribonucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) was used to investigate apoptosis in the intracellular amastigotes. L. braziliensis-infected hamsters were treated from the seventh day of infection with LQB-118 administered intralesionally (26 µg/kg/day, three times a week) or orally (4,3 mg/kg/day, five times a week) for eight weeks. LQB-118 was active against the L. braziliensis promastigotes and intracellular amastigotes, producing IC50 (50% inhibitory concentration) values of 3,4±0,1 and 7,5±0,8 µM, respectively. LQB-118 induced promastigote phosphatidylserine externalization accompanied by increased reactive oxygen species production and ATP depletion. Intracellular amastigote DNA fragmentation was also observed, without affecting the viability of macrophages. The treatment of L. braziliensis-infected hamsters with LQB-118, either orally or intralesionally, was effective in the control of lesion size, parasite load and increase intradermal reaction to parasite antigen. Taken together, these results show that the antileishmanial effect of LQB-118 extends to L. braziliensis in the hamster model, involves the induction of parasite apoptosis and shows promising therapeutic option by oral or local routes in leishmaniasis. PMID:25340550

Costa, Luciana; Pinheiro, Roberta O.; Dutra, Patricia M. L.; Santos, Rosiane F.; Cunha-Junior, Edezio F.; Torres-Santos, Eduardo C.; da Silva, Alcides J. M.; Costa, Paulo R. R.; Da-Silva, Silvia A. G.

2014-01-01

374

Detecting Airborne Mercury by Use of Palladium Chloride  

NASA Technical Reports Server (NTRS)

Palladium chloride films have been found to be useful as alternatives to the gold films heretofore used to detect airborne elemental mercury at concentrations of the order of parts per billion (ppb). Somewhat more specifically, when suitably prepared palladium chloride films are exposed to parts-per-billion or larger concentrations of airborne mercury, their electrical resistances change by amounts large enough to be easily measurable. Because airborne mercury adversely affects health, it is desirable to be able to detect it with high sensitivity, especially in enclosed environments in which there is a risk of leakage of mercury from lamps or other equipment. The detection of mercury by use of gold films involves the formation of gold/mercury amalgam. Gold films offer adequate sensitivity for detection of airborne mercury and could easily be integrated into an electronic-nose system designed to operate in the temperature range of 23 to 28 C. Unfortunately, in order to regenerate a gold-film mercury sensor, one must heat it to a temperature of 200 C for several minutes in clean flowing air. In preparation for an experiment to demonstrate the present sensor concept, palladium chloride was deposited from an aqueous solution onto sets of gold electrodes and sintered in air to form a film. Then while using the gold electrodes to measure the electrical resistance of the films, the films were exposed, at a temperature of 25 C, to humidified air containing mercury at various concentrations from 0 to 35 ppb (see figure). The results of this and other experiments have been interpreted as signifying that sensors of this type can detect mercury in room-temperature air at concentrations of at least 2.5 ppb and can readily be regenerated at temperatures <40 C.

Ryan, Margaret; Shevade, Abhijit; Kisor, Adam; Homer, Margie; Jewell, April; Manatt, Kenneth; Torres, Julia; Soler, Jessica; Taylor, Charles

2009-01-01

375

Luminescent Cyclometalated Platinum and Palladium Complexes with Novel Photophysical Properties  

NASA Astrophysics Data System (ADS)

Organic light emitting diodes (OLEDs) is a rapidly emerging technology based on organic thin film semiconductors. Recently, there has been substantial investment in their use in displays. In less than a decade, OLEDs have grown from a promising academic curiosity into a multi-billion dollar global industry. At the heart of an OLED are emissive molecules that generate light in response to electrical stimulation. Ideal emitters are efficient, compatible with existing materials, long lived, and produce light predominantly at useful wavelengths. Developing an understanding of the photophysical processes that dictate the luminescent properties of emissive materials is vital to their continued development. Chapter 1 and Chapter 2 provide an introduction to the topics presented and the laboratory methods used to explore them. Chapter 3 discusses a series of tridentate platinum complexes. A synthetic method utilizing microwave irradiation was explored, as well as a study of the effects ligand structure had on the excited state properties. Results and techniques developed in this endeavor were used as a foundation for the work undertaken in later chapters. Chapter 4 introduces a series of tetradentate platinum complexes that share a phenoxy-pyridyl (popy) motif. The new molecular design improved efficiency through increased rigidity and modification of the excited state properties. This class of platinum complexes were markedly more efficient than those presented in Chapter 3, and devices employing a green emitting complex of the series achieved nearly 100% electron-to-photon conversion efficiency in an OLED device. Chapter 5 adapts the ligand structure developed in Chapter 4 to palladium. The resulting complexes exceed reported efficiencies of palladium complexes by an order of magnitude. This chapter also provides the first report of a palladium complex as an emitter in an OLED device. Chapter 6 discusses the continuation of development efforts to include carbazolyl components in the ligand. These complexes possess interesting luminescent properties including ultra-narrow emission and metal assisted delayed fluorescence (MADF) emission.

Turner, Eric

376

Atomic deuterium emission from palladium deuteride PdDy surface.  

NASA Astrophysics Data System (ADS)

Deuterium desorption from the surface of decomposing palladium deuteride was studied by monitoring the atomic component of the desorbing gas using an adsorption method. A thin gold film was applied as an adsorbent active for D adsorption, but inert to D2 adsorption. The deuterium deposit thereby collected on the Au surface was analysed by means of the thermal desorption mass spectrometry (TDMS). The atomic component of deuterium, arising by desorption from decomposing PdDy was clearly detected. The experimental results obtained for PdDy, are compared with those observed during the decomposition of PdHx.

Nowicka, Ewa; Wolfram, Zbigniew; Lisowski, Wojciech; Dus, Ryszard

377

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

122 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 8,630 12,000 13,200 13,600 17,000 Ruthenium 9,890 15,900 18,800 23,200 30,000 Iridium 2,100 2.41 150.00 Iridium 294.62 93.02 185.33 169.51 350.00 Employment, mine, number1 1,580 1,540 1,580 1,620 1

378

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 12,000 13,200 13,600 15,900 18,000 Ruthenium 15,900 18,800 23,200 36,000 37,000 Iridium 2,200 3.41 193.09 610.00 Iridium 93.02 185.33 169.51 349.45 440.00 Employment, mine, number1 1,540 1,580 1,620 1

379

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

120 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,600 12,600 11,200 12,800 12,000 Ruthenium 48,700 49,800 21,200 14,100 15,000 Iridium 3,410 2,550 1,520 3.60 97.28 198.45 170.00 Iridium 444.43 448.34 420.40 642.15 1,030.00 Employment, mine, number 1 1,630 1

380

PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium)  

E-print Network

126 PLATINUM-GROUP METALS (Platinum, palladium, rhodium, ruthenium, iridium, osmium) (Data,000 Rhodium 12,400 8,630 12,000 13,200 14,000 Ruthenium 8,170 9,890 15,900 18,800 24,000 Iridium 3,110 2,100 2.00 Rhodium 1,600.00 838.88 530.28 983.24 2,000.00 Ruthenium 130.67 66.33 35.43 64.22 70.00 Iridium 415.25 294

381

Palladium nanoparticles on InP for hydrogen detection  

PubMed Central

Layers of palladium (Pd) nanoparticles on indium phosphide (InP) were prepared by electrophoretic deposition from the colloid solution of Pd nanoparticles. Layers prepared by an opposite polarity of deposition showed different physical and morphological properties. Particles in solution are separated and, after deposition onto the InP surface, they form small aggregates. The size of the aggregates is dependent on the time of deposition. If the aggregates are small, the layer has no lateral conductance. Forward and reverse I-V characteristics showed a high rectification ratio with a high Schottky barrier height. The response of the structure on the presence of hydrogen was monitored. PMID:21711487

2011-01-01

382

Palladium nanoparticles on InP for hydrogen detection.  

PubMed

Layers of palladium (Pd) nanoparticles on indium phosphide (InP) were prepared by electrophoretic deposition from the colloid solution of Pd nanoparticles. Layers prepared by an opposite polarity of deposition showed different physical and morphological properties. Particles in solution are separated and, after deposition onto the InP surface, they form small aggregates. The size of the aggregates is dependent on the time of deposition. If the aggregates are small, the layer has no lateral conductance. Forward and reverse I-V characteristics showed a high rectification ratio with a high Schottky barrier height. The response of the structure on the presence of hydrogen was monitored. PMID:21711487

Cernohorsky, Ondrej; Zdansky, Karel; Zavadil, Jiri; Kacerovsky, Pavel; Piksova, Katerina

2011-01-01

383

Neutron capture and transmission measurements on fission product palladium-107  

Microsoft Academic Search

Neutron capture and transmission measurements were made on a sample of fission-product palladium. The level parameters were obtained for 34 ¹°⁷Pd resonances below 700 eV. The observed average level spacing was = (10.7 +- 1.5) eV, and the s-wave neutron strength function was determined to be 10⁴ Sâ = (0.56\\/sup +0\\/.¹⁶\\/sub -0.12\\/). The capture width Gamma\\/sub ..gamma..\\/ for the

U. N. Singh; R. C. Block; Y. Nakagome

1978-01-01

384

Synthesis of novel photochromic pyrans via palladium-mediated reactions.  

PubMed

Photochromic pyrans for applications in material and life sciences were synthesized via palladium-mediated cyanation, carbonylation and Sonogashira cross-coupling starting from bromo-substituted naphthopyran 1 and benzopyrans 2a/b. A novel photoswitchable benzopyran-based omega-amino acid 6 for Fmoc-based solid-phase peptide synthesis is presented. The photochromic behaviour of the 3-cyano-substituted benzopyran 5a was investigated by time-resolved absorption spectroscopy in the picosecond time domain. PMID:19590750

Böttcher, Christoph; Zeyat, Gehad; Ahmed, Saleh A; Irran, Elisabeth; Cordes, Thorben; Elsner, Cord; Zinth, Wolfgang; Rueck-Braun, Karola

2009-01-01

385

Isomerization of diacetoxybutenes on intermetallic compounds of palladium and rhodium  

SciTech Connect

A study has been made of the isomerization of cis- and trans-1,4-diacetoxybut-2-enes and 3,4-diacetoxybut-1-ene, catalysed by intermetallic compounds of palladium and rhodium. During geometric isomerization, two mechanisms are realized: the traditional triplet (biradical) mechanism and an exchange mechanism. Skeletal-structural isomerization is the intermediate link during Z,E-transformation of diacetoxybutenes. The predominant formation of one of the geometric isomers is determined by the nature of the platinoid atom in the catalytic system. 8 refs., 2 figs., 3 tabs.

Devekki, A.V.; Yakushkin, M.I.; Kul`chitskaya, T.Yu.; Trushova, N.V. [All-Union Scientific Research Inst. of Petrochemical Processes, St. Petersburg (Russian Federation)

1992-12-31

386

Determination of palladium and platinum by atomic absorption  

USGS Publications Warehouse

Palladium and platinum are determined by atomic absorption after fire-assay concentration into a gold bead. The limit of determination is ~0??06 ppm in a 20-g sample. Serious depressive interelement interferences are removed by buffering the solutions with a mixture of cadmium and copper sulphates with cadmium and copper concentrations each at 0??5%. Substantial amounts of Ag, Al, Au, Bi, Ca, Co, Cr, Fe, Hg, K, La, Mg, Mn, Mo, Na, Ni, Pb, Te, Ti, V, Y, Zn, and the platinum metals do not interfere in the atomic-absorption determination. ?? 1969.

Schnepfe, M. M.; Grimaldi, F. S.

1969-01-01

387

Ozone sensing based on palladium decorated carbon nanotubes.  

PubMed

Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on a film of sensitive material (MWCNTs-Pd) deposited by drop coating on platinum interdigitated electrodes on a SiO? substrate. The sensor exhibited a resistance change to ozone (O?) with a response time of 60 s at different temperatures and the capability of detecting concentrations up to 20 ppb. The sensor shows the best response when exposed to O3 at 120 °C. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response. PMID:24736133

Colindres, Selene Capula; Aguir, Khalifa; Cervantes Sodi, Felipe; Vargas, Luis Villa; Salazar, José Moncayo; Febles, Vicente Garibay

2014-01-01

388

Porosities in a dental silver-palladium casting alloy.  

PubMed

Twelve single crowns were cast in a silver-palladium alloy by six different casting techniques. Polished sections of the crowns were inspected and photographically recorded by light microscopy. The area of the inspected section of the casting and the number and area of pores were recorded on the photographs by means of a digitizing table connected to a microcomputer. A great number of defects were observed unevenly distributed in all castings. Only small variations were observed between the various casting techniques. PMID:3893023

Oilo, G; Holland, R I; Johansen, O A

1985-03-01

389

Palladium- and nickel-catalyzed alkenylation of enolates.  

PubMed

Transition-metal-catalyzed alkenylation of enolates provides a direct method to synthesize broadly useful ?,?-unsaturated carbonyl compounds from the corresponding carbonyl compound and alkenyl halides. Despite being reported in the early seventies, this reaction class saw little development for many years. In the past decade, however, efforts to develop this reaction further have increased considerably, and many research groups have reported efficient coupling protocols, including enantioselective versions. These reactions most commonly employ palladium catalysts, but there are also some important reports using nickel. There are many examples of this powerful transformation being used in the synthesis of complex natural products. PMID:23325616

Ankner, Tobias; Cosner, Casey C; Helquist, Paul

2013-02-01

390

19 CFR 118.21 - Temporary suspension; permanent revocation of selection and cancellation of agreement to operate...  

...and cancellation of agreement to operate a CES. 118.21 Section 118.21 Customs...EXAMINATION STATIONS Termination of a CES § 118.21 Temporary suspension...and cancellation of agreement to operate a CES. The port director may immediately...

2014-04-01

391

19 CFR 118.21 - Temporary suspension; permanent revocation of selection and cancellation of agreement to operate...  

Code of Federal Regulations, 2010 CFR

...and cancellation of agreement to operate a CES. 118.21 Section 118.21 Customs...EXAMINATION STATIONS Termination of a CES § 118.21 Temporary suspension...and cancellation of agreement to operate a CES. The port director may immediately...

2010-04-01

392

19 CFR 118.21 - Temporary suspension; permanent revocation of selection and cancellation of agreement to operate...  

Code of Federal Regulations, 2013 CFR

...and cancellation of agreement to operate a CES. 118.21 Section 118.21 Customs...EXAMINATION STATIONS Termination of a CES § 118.21 Temporary suspension...and cancellation of agreement to operate a CES. The port director may immediately...

2013-04-01

393

19 CFR 118.21 - Temporary suspension; permanent revocation of selection and cancellation of agreement to operate...  

Code of Federal Regulations, 2011 CFR

...and cancellation of agreement to operate a CES. 118.21 Section 118.21 Customs...EXAMINATION STATIONS Termination of a CES § 118.21 Temporary suspension...and cancellation of agreement to operate a CES. The port director may immediately...

2011-04-01

394

19 CFR 118.21 - Temporary suspension; permanent revocation of selection and cancellation of agreement to operate...  

Code of Federal Regulations, 2012 CFR

...and cancellation of agreement to operate a CES. 118.21 Section 118.21 Customs...EXAMINATION STATIONS Termination of a CES § 118.21 Temporary suspension...and cancellation of agreement to operate a CES. The port director may immediately...

2012-04-01

395

Recovery of palladium from an industrial wastewater using liquid surfactant membranes  

SciTech Connect

Selective recovery of palladium from an industrial wastewater including a large amount of iron was studied by liquid surfactant membranes (LSMs) prepared with a sulfur-containing extractant as a carrier in a stirred cell. The extraction behavior of palladium and iron ions in liquid-liquid extraction was also investigated in order to choose an appropriate carrier for the LSM operations. Palladium ions were found to be extracted selectively over iron ions by using the sulfur-containing extractant from an acidic aqueous solution. The effects of several chemical species and operation factors on the recovery of palladium by LSMs were systematically examined with several kinds of sulfur-containing carriers and thiourea as a stripping reagent. The selection of carrier is a key factor for designing an efficient recovery process of palladium with an LSM technique. Di-2-ethylexyl monothiophosphoric acid (commercial name MSP-8) appears to be one of the best carriers currently available for palladium recovery using the LSM technique. Recovery of more than 95% palladium from a pseudoindustrial wastewater could be attained in a few minutes under optimum conditions.

Kakoe, T.; Horinouchi, N; Goto, M.; Nakashio, F. [Kyushu Univ., Hakozaki, Fukuoka (Japan)

1996-02-01

396

The study of palladium ions incorporation into the mesoporous ordered silicates  

NASA Astrophysics Data System (ADS)

In this work mesoporous ordered silica materials containing palladium species were prepared using of tetraammine palladium chloride ([Pd(NH3)4]Cl2) complex as a palladium source during synthesis and by wetness impregnation of pure support by solution containing dissolved metal salt. The ammonia ligands from tetraammine palladium chloride were removed during calcination or during thermal treatment at 300 °C in oxygen atmosphere. For reduction of palladium ions to metallic state as prepared materials were treated by hydrogen at high temperature. In this work the locations of palladium atoms in silica lattice were considered by study of binding energy changes of cardinal atoms of mesoporous ordered silica. Ordered mesoporous silicates (MCM-41 and SBA-15) are very promising materials for a wide range of industrial applications due to their unique properties as well-defined ordered structure and excellent textural properties. They exhibit high surface area with high pore volume. Such supports ensure a high dispersion of the metal nanoparticles or other active phases providing the high activity of solid catalysts. The obtained materials were characterized primarily by X-ray diffraction (XRD) technique, X-ray photoelectron spectroscopy (XPS), nitrogen adsorption-desorption isotherms, and infrared spectroscopy. The proportional content of palladium was controlled by X-ray fluorescence technique.

Zienkiewicz-Strza?ka, M.; Pikus, S.

2012-11-01

397

41 CFR 102-118.630 - How must a TSP refund amounts due to GSA?  

Code of Federal Regulations, 2013 CFR

...GSA Audit Division at: General Services Administration Transportation Audit Division (QMCA) Crystal Plaza 4, Room 300 2200 Crystal Drive Arlington, VA 22202 www.gsa.gov/transaudits Note to § 102-118.630:...

2013-07-01

398

41 CFR 102-118.630 - How must a TSP refund amounts due to GSA?  

Code of Federal Regulations, 2011 CFR

...GSA Audit Division at: General Services Administration Transportation Audit Division (QMCA) Crystal Plaza 4, Room 300 2200 Crystal Drive Arlington, VA 22202 www.gsa.gov/transaudits Note to § 102-118.630:...

2011-01-01

399

41 CFR 102-118.630 - How must a TSP refund amounts due to GSA?  

Code of Federal Regulations, 2010 CFR

...GSA Audit Division at: General Services Administration Transportation Audit Division (QMCA) Crystal Plaza 4, Room 300 2200 Crystal Drive Arlington, VA 22202 www.gsa.gov/transaudits Note to § 102-118.630:...

2010-07-01

400

41 CFR 102-118.630 - How must a TSP refund amounts due to GSA?  

Code of Federal Regulations, 2012 CFR

...GSA Audit Division at: General Services Administration Transportation Audit Division (QMCA) Crystal Plaza 4, Room 300 2200 Crystal Drive Arlington, VA 22202 www.gsa.gov/transaudits Note to § 102-118.630:...

2012-01-01

401

24 CFR 904.118 - Homeowners association-planned unit development (PUD).  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Homeowners association-planned unit development...Description § 904.118 Homeowners association—planned unit development...maintenance until such time as the homeowners association assumes such...

2011-04-01

402

24 CFR 904.118 - Homeowners association-planned unit development (PUD).  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Homeowners association-planned unit development...Description § 904.118 Homeowners association—planned unit development...maintenance until such time as the homeowners association assumes such...

2012-04-01

403

24 CFR 904.118 - Homeowners association-planned unit development (PUD).  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Homeowners association-planned unit development...Description § 904.118 Homeowners association—planned unit development...maintenance until such time as the homeowners association assumes such...

2010-04-01

404

42 CFR 422.118 - Confidentiality and accuracy of enrollee records.  

Code of Federal Regulations, 2010 CFR

...MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICARE PROGRAM MEDICARE ADVANTAGE PROGRAM Benefits and Beneficiary Protections § 422.118 Confidentiality and accuracy of enrollee records. For...

2010-10-01

405

41 CFR 102-118.535 - Are there principles governing my agency's TSP debt collection procedures?  

Code of Federal Regulations, 2010 CFR

...Contracts and Property Management 3 2010-07-01... false Are there principles governing my agency's...Contracts and Property Management Federal Property...Continued) FEDERAL MANAGEMENT REGULATION TRANSPORTATION...102-118.535 Are there principles governing my...

2010-07-01

406

9 CFR 113.118 - Pasteurella Multocida Bacterin, Avian Isolate, Type 3.  

...Section 113.118 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE VIRUSES, SERUMS, TOXINS, AND ANALOGOUS PRODUCTS; ORGANISMS AND VECTORS STANDARD REQUIREMENTS Inactivated...

2014-01-01

407

9 CFR 118.3 - Movement of detained biological products; Termination of detention.  

Code of Federal Regulations, 2012 CFR

... Section 118.3 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE VIRUSES, SERUMS, TOXINS, AND ANALOGOUS PRODUCTS; ORGANISMS AND VECTORS DETENTION; SEIZURE AND CONDEMNATION §...

2012-01-01

408

40 CFR 63.118 - Process vent provisions-periodic reporting and recordkeeping requirements.  

Code of Federal Regulations, 2013 CFR

...Pollutants From the Synthetic Organic Chemical Manufacturing Industry for Process Vents, Storage Vessels, Transfer Operations, and Wastewater § 63.118 Process vent provisions—periodic reporting and recordkeeping requirements. (a) Each owner or...

2013-07-01

409

1 CFR 11.8 - LSA (List of CFR Sections Affected).  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false LSA (List of CFR Sections Affected). 11...PUBLICATIONS SUBSCRIPTIONS § 11.8 LSA (List of CFR Sections Affected). The annual subscription price for the monthly LSA (List of CFR Sections...

2010-01-01

410

14 CFR 1230.118 - Applications and proposals lacking definite plans for involvement of human subjects.  

...lacking definite plans for involvement of human subjects. 1230.118 Section 1230...AND SPACE ADMINISTRATION PROTECTION OF HUMAN SUBJECTS (Eff. until 2-14-14) ...lacking definite plans for involvement of human subjects. Certain types...

2014-01-01

411

Submitted PODS 2001, paper ID: 118 Efficient Computation of Temporal Aggregates with Range Predicates  

E-print Network

Submitted PODS 2001, paper ID: 118 Efficient Computation of Temporal Aggregates with Range Seeger -- Extended Abstract A temporal aggregation query is an important but costly operation volume of such data, performance improvements for temporal aggregation queries are critical

Tsotras, Vassilis J.

412

10 CFR 51.118 - Final environmental impact statement-notice of availability.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Final environmental impact statement-notice of availability... § 51.118 Final environmental impact statement—notice of availability...completion of a final environmental impact statement or any supplement...

2010-01-01

413

10 CFR 51.118 - Final environmental impact statement-notice of availability.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Final environmental impact statement-notice of availability... § 51.118 Final environmental impact statement—notice of availability...completion of a final environmental impact statement or any supplement...

2013-01-01

414

10 CFR 51.118 - Final environmental impact statement-notice of availability.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Final environmental impact statement-notice of availability... § 51.118 Final environmental impact statement—notice of availability...completion of a final environmental impact statement or any supplement...

2012-01-01

415

10 CFR 51.118 - Final environmental impact statement-notice of availability.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 false Final environmental impact statement-notice of availability... § 51.118 Final environmental impact statement—notice of availability...completion of a final environmental impact statement or any supplement...

2011-01-01

416

10 CFR 51.118 - Final environmental impact statement-notice of availability.  

...2014-01-01 false Final environmental impact statement-notice of availability... § 51.118 Final environmental impact statement—notice of availability...completion of a final environmental impact statement or any supplement...

2014-01-01

417

40 CFR 82.118 - Compliance by wholesalers, distributors and retailers.  

...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) PROTECTION OF STRATOSPHERIC OZONE The Labeling of Products Using Ozone-Depleting Substances § 82.118 Compliance by wholesalers, distributors and retailers....

2014-07-01

418

Supported palladium nanoparticles synthesized by living plants as a catalyst for Suzuki-Miyaura reactions.  

PubMed

The metal accumulating ability of plants has previously been used to capture metal contaminants from the environment; however, the full potential of this process is yet to be realized. Herein, the first use of living plants to recover palladium and produce catalytically active palladium nanoparticles is reported. This process eliminates the necessity for nanoparticle extraction from the plant and reduces the number of production steps compared to traditional catalyst palladium on carbon. These heterogeneous plant catalysts have demonstrated high catalytic activity in Suzuki coupling reactions between phenylboronic acid and a range of aryl halides containing iodo-, bromo- and chloro- moieties. PMID:24489869

Parker, Helen L; Rylott, Elizabeth L; Hunt, Andrew J; Dodson, Jennifer R; Taylor, Andrew F; Bruce, Neil C; Clark, James H

2014-01-01

419

Supported Palladium Nanoparticles Synthesized by Living Plants as a Catalyst for Suzuki-Miyaura Reactions  

PubMed Central

The metal accumulating ability of plants has previously been used to capture metal contaminants from the environment; however, the full potential of this process is yet to be realized. Herein, the first use of living plants to recover palladium and produce catalytically active palladium nanoparticles is reported. This process eliminates the necessity for nanoparticle extraction from the plant and reduces the number of production steps compared to traditional catalyst palladium on carbon. These heterogeneous plant catalysts have demonstrated high catalytic activity in Suzuki coupling reactions between phenylboronic acid and a range of aryl halides containing iodo-, bromo- and chloro- moieties. PMID:24489869

Parker, Helen L.; Rylott, Elizabeth L.; Hunt, Andrew J.; Dodson, Jennifer R.; Taylor, Andrew F.; Bruce, Neil C.; Clark, James H.

2014-01-01

420

Improved separation of palladium species in biological matrices by using a combination of gel permeation chromatography and isotachophoresis.  

PubMed

The binding of palladium to high-molecular-mass compounds in palladium-treated lettuce is investigated as an example for a biological matrix. The total palladium concentration in lettuce leaves is 10.3 ng/g wet weight. After homogenization, high-molecular-mass compounds (> 10 kDa) are isolated by ultrafiltration. For separation of these palladium species a combination of preparative gel permeation chromatography (GPC) and preparative isotachophoresis (ITP) is used. Palladium is determined in separated fractions by using a highly sensitive total reflection X-ray fluorescence (TXRF) method after preconcentration. After GPC separation, four main fractions of palladium species are collected, each containing palladium in ng quantities (3-10 ng). Two of these fractions are further separated by ITP, yielding at least three main peaks per GPC fraction, each containing palladium in the range of 0.3-3 ng. These palladium containing peaks are characterized by high-performance size exclusion chromatography (HPSEC) and capillary isotachophoresis (cITP) in parallel. HPSEC enables the estimation of the molecular mass of six main palladium peaks, covering a molecular mass range of 69-200 kDa. It is also shown that the estimation of molecular mass after separation is more reliable than the respective estimation directly in the first GPC run. However, cITP reveals that each of the separated peaks is still a mixture of at least five different compounds. PMID:15213973

Weber, Günther; Messerschmidt, Jürgen; von Bohlen, Alex; Kastenholz, Bernd; Günther, Klaus

2004-06-01

421

Rapid Responding Palladium-Silver Surface Modified Microsensor for Hydrogen  

SciTech Connect

Most palladium thin film based hydrogen gas sensors have response and recovery times that are too long to make them useful in vehicular and stationary gas leak detection applications. In contrast, a palladium-silver thin film based microcantilever (MC) hydrogen gas microsensor is reported herein with near ideal response characteristics for use in these hydrogen economy related applications. Specifically, 3-10 second response and recovery times have been measured for these sensors in contrast to previous sensor response measurements of several to tens of minutes using Pd thin film and MC based sensing techniques. The much reduced response times observed in the present study are attributed to a wet chemical Pd-Ag thin film deposition technique and a gas conditioning protocol that produces a highly nanostructured, porous film that rapidly adsorbs and desorbs H2, allowing rapid equilibration with the H2 concentration in the surrounding air. The wet chemical process and gas phase conditioning offer a novel approach at creating highly structured surfaces that have not been reported for MC devices. Additionally, these sensors have very low H2 detection thresholds, wide dynamic range and very good selectivity relative to common interferents.

Patton, James [ORNL; Hunter, Scott Robert [ORNL; Sepaniak, Michael [University of Tennessee, Knoxville (UTK); Datskos, Panos G [ORNL; Smith, Barton [ORNL

2010-01-01

422

Palladium(II) complexes of diphenylvinyl- and phenyldivinylphosphine  

SciTech Connect

Palladium(II) complexes of the ligands L = Ph/sub 2/PCH/double bond/CH/sub 2/ and PhP(CH/double bond/CH/sub 2/)/sub 2/ have been prepared and characterized by elemental analysis, infrared spectroscopy, and /sup 1/H, /sup 1/H(/sup 31/P), /sup 13/C(/sup 1/H), /sup 31/P(/sup 1/H), and /sup 1/H//sup 13/C HETCOR nuclear magnetic resonance spectroscopy. These complexes exist as temperature-dependent equilibrium mixtures of cis and trans isomers in solution. Equilibrium thermodynamics for the isomerization process cis-L/sub 2/PdX/sub 2/ /rightleftharpoons/ trans-L/sub 2/PdX/sub 2/, determined by variable-temperature /sup 31/P(/sup 1/H) NMR spectroscopy, demonstrate that the cis isomers are in general thermodynamically more stable than the trans isomers. However, the relatively isomer stabilities are anion dependent with the trans isomer becoming more stable in the order Cl < Br < I. Coordination of a vinylphosphine to palladium(II) strongly polarizes the C/double bond/C double bond as evidenced by /sup 13/C NMR data. 27 refs., 2 figs., 4 tabs.

Rahn, J.A.; Holt, M.S.; O'Neil-Johnson, M.; Nelson, J.H.

1988-04-20

423

PALLADIUM/COPPER ALLOY COMPOSITE MEMBRANES FOR HIGH TEMPERATURE HYDROGEN SEPARATION  

SciTech Connect

This report summarizes progress made during the first year of research funding from DOE Grant No. DE-FG26-03NT41792 at the Colorado School of Mines. The period of performance was September 1, 2003 through August of 2004. Composite membranes, consisting of a thin Pd alloy film supported on a porous substrate have been investigated as a means of reducing the membrane cost and improving H{sub 2} flux. An electroless plating technique was utilized to deposit subsequent layers of palladium and copper over zirconia and alumina-based microfilters. The composite membranes thus made were annealed and tested at temperatures ranging from 250 to 500 C, under very high feed pressures (up to 450 psig) using pure gases and gaseous mixtures containing H{sub 2}, CO, CO{sub 2}, H{sub 2}O and H{sub 2}S, with the purpose of determining the effects these variables had on the H{sub 2} permeation rate, selectivity and percent recovery. The inhibition caused by CO/CO{sub 2} gases on a 7 {micro}m thick Pd-Cu composite membrane was less than 17% over a wide range of compositions at 350 C. H{sub 2}S caused a strong inhibition of the H{sub 2} flux of the same Pd-Cu composite membrane, which is accentuated at levels of 100 ppm or higher. The membrane was exposed to 50 ppm three times without permanent damage. At higher H{sub 2}S levels, above 100 ppm the membrane suffered some physical degradation and its performances was severely affected. The use of sweep gases improved the hydrogen flux and recovery of a Pd-Cu composite membrane. Recently, we have been able to dramatically reduce the thickness of these Pd alloy membranes to approximately one micron. This is significant because at this thickness, it is the cost of the porous support that controls the materials cost of a composite Pd alloy membrane, not the palladium inventory. Very recent results show that the productivity of our membranes is very high, essentially meeting the DOE pure hydrogen flux target value set by the DOE Hydrogen Program. These results were obtained when a 1.3-micron-thick Pd{sub 95}Cu{sub 5} (composition given in mass %) alloy film was coated on a Pall Corporation Membralox{reg_sign} T1-70 tubular ceramic substrate. The flux of this membrane would be even higher if the alloy composition was 40 wt. % Cu.

J. Douglas Way

2004-08-31

424

Enterohemorrhagic Escherichia coli (EHEC) strains of serogroup O118 display three distinctive clonal groups of EHEC pathogens.  

PubMed

A recent case report of a child infected with enterohemorrhagic Escherichia coli (EHEC) of serotype O118:H16 in Bavaria, in association with the isolation of a bovine O118 strain on the same farm (A. Weber, H. Klie, H. Richter, P. Gallien, M. Timm, and K. W. Perlberg, Berl. Muench. Tieraerztl. Wochenschr. 110:211-213, 1997), prompted us to investigate the relationship between bovine and human strains of serogroup O118. A total of 29 human O118 E. coli strains from Europe (21), Canada (4), and Peru (4) were compared by virulence typing and macrorestriction analysis with 7 bovine O118 EHEC strains isolated in Bavaria. Twenty-five of the human strains were characterized as EHEC. By serotyping and determination of the virulence-associated factors Shiga toxin (stx1 stx2 stx2 variants), intimin (eae), and EHEC hemolysin (Hly(EHEC)), three distinctive groups of O118 human pathogens were identified. Most of the strains belonged to serotype O118:H16, displaying the virulence traits Stx1, intimin, Hly(EHEC), and EspP/PssA (group 1). In addition, we identified strains of serotype O118:H12 (Stx2d only; group 2) and of serotype O118:H30 (Stx2 and intimin; group 3). Macrorestriction analysis with BlnI and XbaI revealed that all strains with a single O118 serotype profile (O118:H12, O118:H16, and O118:H30) belonged to one clonal cluster, irrespective of their origin. Group 1 strains clustered in the same clonal group as the bovine O118:H16 strains. Moreover, four pairs of strains of different origins and indistinguishable by all other methods applied were identified as group 1 strains. Our data support the direct transmission of an EHEC O118:H16 strain from a calf to a 2-year-old boy in the above-mentioned case report. Since bovine and human O118:H16 strains represent the same clones, they must be considered zoonotic EHEC pathogens. In contrast, EHEC strains of serotypes O118:H12 and O118:H30 have been isolated only from humans, indicating a reservoir for certain human O118 EHEC strains other than bovines. PMID:10834970

Wieler, L H; Busse, B; Steinrück, H; Beutin, L; Weber, A; Karch, H; Baljer, G

2000-06-01

425

Palladium-catalyzed C-C, C-N and C-O bond formation  

E-print Network

New methods for Pd-catalyzed cross-coupling reactions of aryl halides or arenesulfonates are described. Key to the success of these transformations is the proper choice of ligand and reaction conditions. Palladium catalysts ...

Huang, Xiaohua, 1973-

2003-01-01

426

Platinum-ruthenium-palladium alloys for use as a fuel cell catalyst  

DOEpatents

A noble metal alloy composition for a fuel cell catalyst, a ternary alloy composition containing platinum, ruthenium and palladium. The alloy shows increased activity as compared to well-known catalysts.

Gorer, Alexander (Sunnyvale, CA)

2002-01-01

427

Development of polymeric palladium-nanoparticle membrane-installed microflow devices and their application in hydrodehalogenation.  

PubMed

We have developed a variety of polymeric palladium-nanoparticle membrane-installed microflow devices. Three types of polymers were convoluted with palladium salts under laminar flow conditions in a microflow reactor to form polymeric palladium membranes at the laminar flow interface. These membranes were reduced with aqueous sodium formate or heat to create microflow devices that contain polymeric palladium-nanoparticle membranes. These microflow devices achieved instantaneous hydrodehalogenation of aryl chlorides, bromides, iodides, and triflates by 10-1000 ppm within a residence time of 2-8 s at 50-90 °C by using safe, nonexplosive, aqueous sodium formate to quantitatively afford the corresponding hydrodehalogenated products. Polychlorinated biphenyl (10-1000 ppm) and polybrominated biphenyl (1000 ppm) were completely decomposed under similar conditions, yielding biphenyl as a fungicidal compound. PMID:22241716

Yamada, Yoichi M A; Watanabe, Toshihiro; Ohno, Aya; Uozumi, Yasuhiro

2012-02-13

428

Low-temperature carbon monoxide oxidation catalysed by regenerable atomically dispersed palladium on alumina.  

PubMed

Catalysis by single isolated atoms of precious metals has attracted much recent interest, as it promises the ultimate in atom efficiency. Most previous reports are on reducible oxide supports. Here we show that isolated palladium atoms can be catalytically active on industrially relevant ?-alumina supports. The addition of lanthanum oxide to the alumina, long known for its ability to improve alumina stability, is found to also help in the stabilization of isolated palladium atoms. Aberration-corrected scanning transmission electron microscopy and operando X-ray absorption spectroscopy confirm the presence of intermingled palladium and lanthanum on the ?-alumina surface. Carbon monoxide oxidation reactivity measurements show onset of catalytic activity at 40 °C. The catalyst activity can be regenerated by oxidation at 700 °C in air. The high-temperature stability and regenerability of these ionic palladium species make this catalyst system of potential interest for low-temperature exhaust treatment catalysts. PMID:25222116

Peterson, Eric J; DeLaRiva, Andrew T; Lin, Sen; Johnson, Ryan S; Guo, Hua; Miller, Jeffrey T; Hun Kwak, Ja; Peden, Charles H F; Kiefer, Boris; Allard, Lawrence F; Ribeiro, Fabio H; Datye, Abhaya K

2014-01-01

429

Recent advances in palladium-catalyzed carbon-carbon and carbon-boron bond forming processes  

E-print Network

Chapter 1. Highly active and efficient catalyst systems derived from palladium precatalysts and monophosphine ligands for the Suzuki-Miyaura cross-coupling reaction of heteroaryl boronic acids and esters has been developed. ...

Billingsley, Kelvin L

2008-01-01

430

Palladium-Catalyzed Conversion of Aryl and Vinyl Triflates to Bromides and Chlorides  

E-print Network

The palladium-catalyzed conversion of aryl and vinyl triflates to aryl and vinyl halides (bromides and chlorides) has been developed using dialkylbiaryl phosphine ligands. A variety of aryl, heteroaryl, and vinyl halides ...

Shen, Xiaoqiang

2010-01-01

431

Synthesis of indoles via palladium-catalyzed annulation of aryl chlorides and internal alkynes  

E-print Network

A palladium-catalyzed preparation of 2,3-disubstituted indoles from commercially available and relatively inexpensive reagents, o-chloroacetanilide and internal alkynes, is reported. The system is efficient in delivering ...

Dussault, Daemian David, 1973-

2005-01-01

432

Gold-promoted structurally ordered intermetallic palladium cobalt nanoparticles for the oxygen reduction reaction.  

PubMed

Considerable efforts to make palladium and palladium alloys active catalysts and a possible replacement for platinum have had a marginal success. Here we report on a structurally ordered Au10Pd40Co50 catalyst that exhibits comparable activity to conventional platinum catalysts in both acid and alkaline media. Electron microscopic techniques demonstrate that, at elevated temperatures, palladium cobalt nanoparticles undergo an atomic structural transition from core-shell to a rare intermetallic ordered structure with twin boundaries forming stable {111}, {110} and {100} facets via addition of gold atoms. The superior stability of this catalyst compared with platinum after 10,000 potential cycles in alkaline media is attributed to the atomic structural order of PdCo nanoparticles along with protective effect of clusters of gold atoms on the surface. This strategy of making ordered palladium intermetallic alloy nanoparticles can be used in diverse heterogeneous catalysis where particle size and structural stability matter. PMID:25373826

Kuttiyiel, Kurian A; Sasaki, Kotaro; Su, Dong; Wu, Lijun; Zhu, Yimei; Adzic, Radoslav R

2014-01-01

433

Palladium-Silver Isotopic Systematics in Muonionalusta and Fractionation in the IVA Iron Meteorite Parent Body  

NASA Astrophysics Data System (ADS)

Palladium-silver isotope data for Group IVA iron meteorite Muonionalusta (Pb-Pb age = 4565 Ma) suggest lower initial 107Pd than chondrites, higher Pd/Ag prior to troilite crystallization, and ~8% S in the bulk meteorite.

Horan, M. F.; Carlson, R. W.; Alexander, C. M. O'd.; Blichert-Toft, J.

2011-03-01

434

PALLADIUM-CATALYZED OXIDATION OF STYRENE AND ALKENES IN PRESENCE OF IONIC LIQUIDS (WACKER REACTION)  

EPA Science Inventory

The use of ionic liquids in various synthetic transformations is gaining significance due to the enhanced reaction rates, potential for recycling and compatibility with various organic compounds and organometallic catalysts. Palladium-catalyzed oxidation of styrene and other alk...

435

Study of the kinetics of catalytic decomposition of hydrazine vapors on palladium  

NASA Technical Reports Server (NTRS)

The decomposition rates of N2H4 on a palladium surface are studied. Experiments were conducted in a circulating unit at atmosphere pressure. The experimental method is described. The laws found for the reaction kinetics are explained by equations.

Khomenko, A. A.; Apelbaum, L. O.

1987-01-01

436

Low-temperature carbon monoxide oxidation catalysed by regenerable atomically dispersed palladium on alumina  

NASA Astrophysics Data System (ADS)

Catalysis by single isolated atoms of precious metals has attracted much recent interest, as it promises the ultimate in atom efficiency. Most previous reports are on reducible oxide supports. Here we show that isolated palladium atoms can be catalytically active on industrially relevant ?-alumina supports. The addition of lanthanum oxide to the alumina, long known for its ability to improve alumina stability, is found to also help in the stabilization of isolated palladium atoms. Aberration-corrected scanning transmission electron microscopy and operando X-ray absorption spectroscopy confirm the presence of intermingled palladium and lanthanum on the ?-alumina surface. Carbon monoxide oxidation reactivity measurements show onset of catalytic activity at 40?°C. The catalyst activity can be regenerated by oxidation at 700?°C in air. The high-temperature stability and regenerability of these ionic palladium species make this catalyst system of potential interest for low-temperature exhaust treatment catalysts.

Peterson, Eric J.; Delariva, Andrew T.; Lin, Sen; Johnson, Ryan S.; Guo, Hua; Miller, Jeffrey T.; Hun Kwak, Ja; Peden, Charles H. F.; Kiefer, Boris; Allard, Lawrence F.; Ribeiro, Fabio H.; Datye, Abhaya K.

2014-09-01

437

A Mild, Palladium-Catalyzed Method for the Dehydrohalogenation of Alkyl Bromides: Synthetic and Mechanistic Studies  

E-print Network

We have exploited a typically undesired elementary step in cross-coupling reactions, ?-hydride elimination, to accomplish palladium-catalyzed dehydrohalogenations of alkyl bromides to form terminal olefins. We have applied ...

Bissember, Alex C.

438

Transfer hydrogenation using recyclable polyurea-encapsulated palladium: efficient and chemoselective reduction of aryl ketones.  

PubMed

A robust and recyclable palladium catalyst [Pd0EnCat] has been prepared by ligand exchange of polyurea-encapsulated palladium(II) acetate with formic acid, resulting in deposition of Pd(0) in the support material; Pd0EnCat is shown to be a highly efficient transfer hydrogenation catalyst for chemoselective reduction of a wide range of aryl ketones to benzyl alcohols. PMID:12703769

Yu, Jin-Quan; Wu, Hai-Chen; Ramarao, Chandrashekar; Spencer, Jonathan B; Ley, Steven V

2003-03-21

439

A new spot test for palladium using triphenylmethane, thiazine, and azo dyes  

Microsoft Academic Search

Summary A new spot test for palladium using Erioglaucine A, Eriogreen B, Xylenecyanol FF, Setoglaucine 0, Setocyanine Supra, Fast Green FCF, Methylene Blue. Thionine, or Methyl Orange is described. The method consists in treating one drop of the palladium salt solution with 2 to 2.8 ml of saturated sodium hypophosphite solution and 0.1 ml of 0.01% dye solution, making the

N. Venkateswara Rao; V. V. S. Eswara Dutt

1970-01-01

440

The role of MgO in methane combustion on palladium catalysts  

Microsoft Academic Search

Palladium catalysts supported by ?-Al2O3 and MgO?-Al2O3 composites were prepared by conventional impregnation and double impregnation. Methane combustion and methane pulse reactions were tested on the supports and catalysts. It was found that composites of MgO?-Al2O3 not only had a certain catalytic effect but also modified the activity of the supported palladium catalysts. The function of MgO changed with its

Caixia Qi; Lidun An; Hongli Wang

1996-01-01

441

The generalized lewis acid-base titration of palladium and niobium  

Microsoft Academic Search

The high thermodynamic stability of alloys composed of platinum group metals and group IVB and VB metals has been explained\\u000a by an electronic interaction analogous to the Lewis acid-base concept for nontransition elements. The analogy is further demonstrated\\u000a by the titration of palladium by addition of niobium. The activity of niobium in solid palladium was measured as a function\\u000a of

M. Cima; L. Brewer

1988-01-01

442

Preparation of palladium supported on MOF-5 and its use as hydrogenation catalyst  

Microsoft Academic Search

A coprecipitation method has been applied successfully for the preparation of 0.5wt.% palladium supported on MOF-5. The apparent surface area was roughly 900m2\\/g, the specific micropore volume was 0.3cm3\\/g, and the powder X-ray diffractograms showed good coincidence with the theoretical pattern of MOF-5. In the hydrogenation of ethyl cinnamate with molecular hydrogen the specific activity of palladium supported on MOF-5

Sabine Opelt; Stefan Türk; Enrico Dietzsch; Antje Henschel; Stefan Kaskel; Elias Klemm

2008-01-01

443

Palladium-catalyzed migratory insertion of isocyanides: an emerging platform in cross-coupling chemistry.  

PubMed

Isocyanides have been important building blocks in organic synthesis since the discovery of the Ugi reaction and related isocyanide-based multicomponent reactions. In the past decade isocyanides have found a new application as versatile C1 building blocks in palladium catalysis. Palladium-catalyzed reactions involving isocyanide insertion offer a vast potential for the synthesis of nitrogen-containing fine chemicals. This Minireview discusses all the achievements in this emerging field. PMID:23754476

Vlaar, Tjøstil; Ruijter, Eelco; Maes, Bert U W; Orru, Romano V A

2013-07-01

444

Influence of casting procedures on the corrosion resistance of clinical dental alloys containing palladium  

Microsoft Academic Search

The aim of this study was to compare the in vitro corrosion resistance in artificial saliva of two palladium–silver alloys (a Pd–Ag (Pors on 4) and an Ag–Pd (Palliag LTG)), with and without casting defects; 1 nickel–chrome alloy and 1 high-gold alloy, cast under recommended conditions, served as controls. For each of the palladium-based alloys, three specimens corresponding to three

Stéphane Viennot; Michèle Lissac; Guillaume Malquarti; Francis Dalard; Brigitte Grosgogeat

2006-01-01

445

Preparation, Characterization and Catalytic Activity of Palladium Nanoparticles Encapsulated in SBA15  

Microsoft Academic Search

A simple adsorption method was studied for the preparation of SBA-15-encapsulated palladium nanoparticles. This method employed\\u000a the SBA-15 with organic template removed by ethanol extraction for the adsorption of cationic Pd precursors in alkaline solution\\u000a followed by calcination and H2 reduction. The pH of the solution was found to be a critical factor in determining the palladium content and the

Changli Li; Qinghong Zhang; Ye Wang; Huilin Wan

2008-01-01

446

H-Point Standard Addition Method for Simultaneous Determination of Palladium and Cobalt  

Microsoft Academic Search

The H-point standard addition method (HPSAM) has been applied to simultaneous determination of palladium and cobalt at trace levels, using 1-(2-pyridylazo)-2-naphthol (PAN) as a chromogenic reagent. Palladium and cobalt at neutral pH levels form green colored neutral complexes with PAN which are soluble in aqueous sodium dodecylsulfate (SDS) micellar media and can be monitored spectrophotometrically. Simultaneous determination of cobalt and

Habibollah Eskandari; Ghadamali Bagherian Dehaghi

2004-01-01

447

Thermodynamics for complex formation between palladium(ii) and oxalate.  

PubMed

Complex formation between [Pd(H2O)4](2+) and oxalate (ox = C2O4(2-)) has been studied spectrophoto-metrically in aqueous solution at variable temperature, ionic strength and pH. Thermodynamic parameters at 298.2 K and 1.00 mol dm(-3) HClO4 ionic medium for the complex formation [Pd(H2O)4](2+) + H2ox ? [Pd(H2O)2(ox)] + 2H3O(+) with equilibrium constant K1,H (in mol dm(-3)) are log10K1,H = 3.38 ± 0.08, ?H = -33 ± 3 kJ mol(-1), and ?S = -48 ± 11 J K(-1) mol(-1), as determined from spectrophotometric equilibrium titrations at 15.0, 20.0, 25.0 and 31.0 °C. Thermodynamic overall stability constants ? (in (mol dm(-3))(-n), n = 1,2) for [Pd(H2O)2(ox)] and [Pd(ox)2](2-) at zero ionic strength and 298.2 K, defined as the equilibrium constants for the reaction Pd(2+) + nox(2-) ? [Pd(ox)n](2-2n) (water molecules omitted) are log10? = 9.04 ± 0.06 and log10? = 13.1 ± 0.3, respectively, calculated by use of Specific Ion Interaction Theory from spectrophotometric titrations with initial hydrogen ion concentrations of 1.00, 0.100 and 0.0100 mol dm(-3) and ionic strengths of 1.00, 2.00 or 3.00 mol dm(-3). The values derived together with literature data give estimated overall stability constants for Pd(ii) compounds such as [Pd(en)(ox)] and cis-[Pd(NH3)2Cl2], some of them analogs to Pt(ii) complexes used in cancer treatment. The palladium oxalato complexes are significantly more stable than palladium(ii) complexes with monodentate O-bonding ligands. A comparison between several different palladium complexes shows that different parameters contribute to the stability variations observed. These are discussed together with the so-called chelate effect. PMID:24912768

Pilný, Radomír; Lubal, P?emysl; Elding, Lars I

2014-08-28

448

Isolation and X-ray characterization of palladium–N complexes in the guanylation of aromatic amines. Mechanistic implications  

PubMed Central

Summary In the context of palladium-catalyzed guanylation of anilines herein, we have been able to characterize and isolate bis(anilino) and bis(guanidino)Pd(II) complexes using reaction conditions under which stoichiometric amounts of palladium salts are used. Characterization of these palladium complexes strongly supports a mechanistic proposal for the catalytic guanylation of anilines using PdCl2(NCCH3)2 as catalyst that involves the intermediacy of these Pd(II) complexes. PMID:23946843

Álvarez, Eleuterio

2013-01-01

449

Determination of platinum and palladium in geological materials by neutron-activation analysis after fire-assay preconcentration  

USGS Publications Warehouse

Fire-asay preconcentration followed by neutron-activation analysis permits the determination of as little as 0.5 ppM of platinum and 0.5 ppM of palladium on a 20-g sample. Platinum and palladium are separated with carriers and beta-counted. Results for the platinum and palladium content of seven U.S.G.S. standard rocks are presented. ?? 1971.

Rowe, J.J.; Simon, F.O.

1971-01-01

450

H-point standard addition method—First derivative spectrophotometry for simultaneous determination of palladium and cobalt  

Microsoft Academic Search

H-point standard addition method (HPSAM) has been applied for simultaneous determination of palladium and cobalt in trace levels, using disodium 1-nitroso-2-naphthol-3, 6-disulphonate (nitroso-R salt) as a selective chromogenic reagent. Palladium and cobalt in the neutral pHs form red color complexes with nitroso-R in aqueous solutions and making spectrophotometric monitoring possible. Simultaneous determination of palladium and cobalt were performed by HPSAM—first

Habibollah Eskandari

2006-01-01

451

Mechanism of the palladium-catalyzed hydrothiolation of alkynes to thioethers: a DFT study.  

PubMed

The mechanisms of the palladium-catalyzed hydrothiolation of alkynes with thiols were investigated using density functional theory at the B3LYP/6-31G(d, p) (SDD for Pd) level. Solvent effects on these reactions were explored using the polarizable continuum model (PCM) for the solvent tetrahydrofuran (THF). Markovnikov-type vinyl sulfides or cis-configured anti-Markovnikov-type products were formed by three possible pathways. Our calculation results suggested the following: (1) the first step of the cycle is a proton-transfer process from thiols onto the palladium atom to form a palladium-thiolate intermediate. The palladium-thiolate species is attacked on alkynes to obtain an elimination product, liberating the catalyst. (2) The higher activation energies for the alkyne into the palladium-thiolate bond indicate that this step is the rate-determining step. The Markovnikov-type vinyl sulfide product is favored. However, for the aromatic alkyne, the cis-configured anti-Markovnikov-type product is favored. (3) The activation energy would reduce when thiols are substituted with an aromatic group. Our calculated results are consistent with the experimental observations of Frech and colleagues for the palladium-catalyzed hydrothiolation of alkynes to thiols. PMID:25138374

Zhang, Xing-hui; Geng, Zhi-yuan; Wang, Ke-tai; Li, Shan-shan

2014-09-01

452

Recycling of a spent iron based catalyst for the complete oxidation of toluene: effect of palladium.  

PubMed

Complete oxidation of volatile organic compound (toluene) was carried out to assess the property and activity of the palladium-spent iron based catalyst. The properties of the prepared catalysts were characterized by using the Brunauer-Emmett-Teller method and by conducting temperature-programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy and field emission transmission electron microscopy. The addition of palladium to the spent iron based catalyst pretreated with oxalic acid shifted the conversion curve for the total oxidation of toluene to lower temperature. An increase in the toluene conversion due to palladium was highly related to the easier lattice oxygen mobility of the catalysts. Instrumental analysis suggested the presence of a strong interaction between palladium and iron oxide species. Moreover, in the case of reducing the Pd/Fe catalyst with hydrogen, palladium accelerated the reducing iron oxides, subsequently decreasing the toluene conversion. As a result, the oxidation states of palladium and iron had an important effect on the catalytic activity. PMID:25413115

Kim, Sang Chai; Nah, Jae Woon

2015-01-01

453

Study of tin oxide: Surface properties and palladium adsorption  

NASA Astrophysics Data System (ADS)

Surface properties of various single-crystalline SnO2 surfaces were studied and the growth of palladium was investigated in the low-coverage regime. Metal - oxide structures play an important role in microelectronics and nanotechnology. They are also widely used in catalysis. Small catalytically-active metal particles on metal oxide substrates are key features in the gas sensing mechanism: they dramatically increase the sensitivity and selectivity of solid-state gas sensors towards target gases. Tin Oxide is widely used in solid-state gas sensors for detection of combustible and toxic gases. Its sensitivity and selectivity strongly depends on catalytic dopants, such as Pd or Pt, on the surface of the material. Thus, the characterization of Pd growth on tin oxide may give new insights into the catalytic and gas sensing mechanisms, and also help to understand fundamental steps that lead to various metal-on-oxide growth modes. Upon deposition of Pd onto the reduced (101) surface of a SnO2 single crystal, 1D cluster growth was observed. Starting from very low coverages, one-dimensional Pd clusters grow on the terraces, which indicates that the Pd wets the reduced tin oxide surface. Pd deposition on the oxidized surface results in randomly distributed three-dimensional Pd clusters. The clusters are distributed at step edges and on terraces without any apparent preferential adsorption sites. The one-dimensional clusters are imaged in scanning tunneling microscopy (STM) as straight, parallel nanostructures oriented along the [-101] direction, all with the same characteristic width of 0.5 nm and a height of 1 monolayer (ML). X-ray photoelectron spectroscopy (XPS) experiments show no sign of Pd oxidation; i.e. Pd grows as a metal. There is a 0.5 eV shift in the Pd 3d 5/2 core level peak position to lower binding energy that occurs during the initial stages of the growth on the reduced surface. This is an indication of charge transfer from the Pd clusters to the substrate. Coverage-dependent Ultraviolet Photoelectron Spectroscopy (UPS) spectra show that, at submonolayer Pd coverages, a Pd 4d-derived peak appears at the same position (3eV from Fermi edge) in the band gap as the Sn surface state and shifts towards the Fermi edge as coverage increases. Angular resolved photoemission data of the valence band of the clean reduced SnO2 surface and the Pd dosed reduced surface shows a strong correlation between the Sn 5s derived surface state and the Pd 4d state. The position, as well as the shape of Pd 4d peak closely follows the position and the shape of the 5s derived Sn peak in both low-index directions. This is a sign of a strong electronic interaction, hybridization between Pd 4d and Sn 5s derived states. Scanning tunneling microscopy experiments on a clean, reduced SnO 2 (100)-(1x1) surface reveal surface defects with zero, one, and two dimensions. Point defects consist of missing SnO/SnO2 units. Line defects are probably crystallographic shear planes that extend to the surface and manifest themselves as rows of atoms, shifted half a unit cell along the [010] direction. Their ends act as preferential nucleation sites for the formation of Pd clusters upon vapor-deposition. Submonolayer coverages of Pd deposited on the reduced surface at room temperature by vapour deposition result in the formation of three-dimensional clusters nucleating on the terraces. Areas of a more reduced surface phase, i.e. elongated "holes", observed at the surface after annealing to higher temperatures, still with a (1x1) structure and a half-unit-cell deep, form at [001]-oriented step edges. Recently, the use of nanobelts and nanoribbons has been suggested as novel materials for gas sensing applications. The large surface-to-volume ratio of the semiconducting metal oxide nanobelts and the congruence of the carrier screening length with their lateral dimensions make them highly sensitive and efficient transducers of surface chemical processes into electrical signal. The surface morphology of an individual nanobelts (NB) was studied with STM. Atom

Katsiev, Khabiboulakh

454

Facile fabrication of ultrafine palladium nanoparticles with size- and location-control in click-based porous organic polymers.  

PubMed

Two click-based porous organic polymers (CPP-1 and CPP-2) are readily synthesized through a click reaction. Using CPP-1 and CPP-2 as supports, palladium nanoparticles (NPs) with uniform and dual distributions were prepared through H2 and NaBH4 reduction routes, respectively. Ultrafine palladium NPs are effectively immobilized in the interior cavities of polymers. The coordination of 1,2,3-triazolyl to palladium and the confinement effect of polymers on palladium NPs are verified by solid-state (13)C NMR and IR spectra, XPS analyses, EDX mapping, and computational calculation. The steric and electronic properties of polymers have a considerable influence on the interaction between polymers and palladium NPs, as well as the catalytic performances of NPs. The ultrafine palladium NPs with uniform distribution exhibit superior stability and recyclability over palladium NPs with dual distributions and palladium on charcoal in the hydrogenation of nitroarenes, and no obvious agglomeration and loss of catalytic activity were observed after recycling several times. The excellent performances mainly result from synergetic effects between palladium NPs and polymers. PMID:24773300

Li, Liuyi; Zhao, Huaixia; Wang, Jinyun; Wang, Ruihu

2014-05-27

455

H-point standard addition method--first derivative spectrophotometry for simultaneous determination of palladium and cobalt.  

PubMed

H-point standard addition method (HPSAM) has been applied for simultaneous determination of palladium and cobalt in trace levels, using disodium 1-nitroso-2-naphthol-3, 6-disulphonate (nitroso-R salt) as a selective chromogenic reagent. Palladium and cobalt in the neutral pHs form red color complexes with nitroso-R in aqueous solutions and making spectrophotometric monitoring possible. Simultaneous determination of palladium and cobalt were performed by HPSAM--first derivative spectrophotometry. First derivative signals at the two pairs of wavelengths, 523 and 589 nm or 513 and 554 nm were monitored with the addition of standard solutions of palladium or cobalt, respectively. The method is able to accurately determine palladium/cobalt ratio 1:10 to 15:1 (wt/wt). Accuracy and reproducibility of the determination method on the various amounts of palladium and cobalt known were evaluated in their binary mixtures. To investigate selectivity of the method and to ensure that no serious interferences were observed the effects of diverse ions on the determination of palladium and cobalt were also studied. The recommended procedure was successfully applied to real and synthetic cobalt or palladium alloys, B-complex ampoules, a palladium-charcoal mixture and real water matrices. PMID:16439317

Eskandari, Habibollah

2006-02-01

456

Colloidal palladium particles of different shapes for electron microscopy labeling.  

PubMed

The immunogold technique is a valuable method for labeling cellular macromolecules. However, multiple labeling using colloidal gold (cAu) nanoparticles of different sizes presents certain drawbacks; namely, as particle size increases, there is a decreased labeling efficiency and diminished spatial resolution with respect to the locations of labeled epitopes. Both concerns also limit the utility of heavy metal particles for comparative analysis of labeling densities. To minimize the variables due to differential labeling efficiencies, the best solution would be to conduct multiple labeling with particles of similar size. Consequently, some parameter other than size is necessary to distinguish each label type. In this study, we report the synthesis of colloidal palladium (cPd) nanoparticles of similar size but having two distinct shapes, umbonate and faceted, which are readily distinguishable from spherical colloidal gold particles. Their utility and fidelity as labels using a human platelet whole-mount model is also demonstrated. PMID:20030909

Meyer, Daryl A; Oliver, Julie A; Albrecht, Ralph M

2010-02-01

457

Bio?palladium: from metal recovery to catalytic applications  

PubMed Central

Summary While precious metals are available to a very limited extent, there is an increasing demand to use them as catalyst. This is also true for palladium (Pd) catalysts and their sustainable recycling and production are required. Since Pd catalysts exist nowadays mostly under the form of nanoparticles, these particles need to be produced in an environment?friendly way. Biological synthesis of Pd nanoparticles (‘bio?Pd’) is an innovative method for both metal recovery and nanocatalyst synthesis. This review will discuss the different bio?Pd precipitating microorganisms, the applications of the catalyst (both for environmental purposes and in organic chemistry) and the state of the art of the reactors based on the bio?Pd concept. In addition, some main challenges are discussed, which need to be overcome in order to create a sustainable nanocatalyst. Finally, some outlooks for bio?Pd in environmental technology are presented. PMID:21554561

De Corte, Simon; Hennebel, Tom; De Gusseme, Bart; Verstraete, Willy; Boon, Nico

2012-01-01

458

Bio-palladium: from metal recovery to catalytic applications.  

PubMed

While precious metals are available to a very limited extent, there is an increasing demand to use them as catalyst. This is also true for palladium (Pd) catalysts and their sustainable recycling and production are required. Since Pd catalysts exist nowadays mostly under the form of nanoparticles, these particles need to be produced in an environment-friendly way. Biological synthesis of Pd nanoparticles ('bio-Pd') is an innovative method for both metal recovery and nanocatalyst synthesis. This review will discuss the different bio-Pd precipitating microorganisms, the applications of the catalyst (both for environmental purposes and in organic chemistry) and the state of the art of the reactors based on the bio-Pd concept. In addition, some main challenges are discussed, which need to be overcome in order to create a sustainable nanocatalyst. Finally, some outlooks for bio-Pd in environmental technology are presented. PMID:21554561

De Corte, Simon; Hennebel, Tom; De Gusseme, Bart; Verstraete, Willy; Boon, Nico

2012-01-01

459

Reactivity indexes for different geometries of palladium leads  

NASA Astrophysics Data System (ADS)

Electronic transport through metallic break junctions or molecules is clearly dependent not only on the electronic structure of the central nanodevice connecting the leads, but also the shape and crystalline orientation of the contacts which can define the possible conduction channels. In this work we examine different geometries of contacts of palladium characterizing them through global and local reactivity indexes as electrophilicity, chemical hardness and Fukui functions. In molecules, these indicators are essentially defined by the energies of the frontier molecular orbitals and in solids they are related with the local and partial density of states. We use for this purpose an ab-initio based code (FIREBALL), applied to plane contacts with (001) fcc faces and also pyramidal tips grown following a (001) and (111) packaging. The results allow us to have an insight about the chemical features of this type of nanojunctions.

Gómez-Carrillo, S. C.; Ortega, J.; Bolcatto, P. G.

2009-05-01

460

Ozone Sensing Based on Palladium Decorated Carbon Nanotubes  

PubMed Central

Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on a film of sensitive material (MWCNTs-Pd) deposited by drop coating on platinum interdigitated electrodes on a SiO2 substrate. The sensor exhibited a resistance change to ozone (O3) with a response time of 60 s at different temperatures and the capability of detecting concentrations up to 20 ppb. The sensor shows the best response when exposed to O3 at 120 °C. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response. PMID:24736133

Colindres, Selene Capula; Aguir, Khalifa; Sodi, Felipe Cervantes; Vargas, Luis Villa; Moncayo Salazar, Jose A.; Febles, Vicente Garibay

2014-01-01

461

Synthesis, structure and dynamics of NHC-based palladium macrocycles.  

PubMed

A series of macrocyclic CNC pincer pro-ligands based on bis(imidazolium)lutidine salts with octa-, deca- and dodecamethylene spacers have been prepared and their coordination chemistry investigated. Using a Ag2O based transmetallation strategy, cationic palladium(II) chloride complexes [PdCl{CNC-(CH2)n}][BAr(F)4] (n = 8, 10, 12; Ar(F) = 3,5-C6H3(CF3)2) were prepared and fully characterised in solution, by NMR spectroscopy and ESI-MS, and in the solid-state, by X-ray crystallography. The smaller macrocyclic complexes (n = 8 and 10) exhibit dynamic behaviour in solution, involving ring flipping of the alkyl spacer across the Pd-Cl bond, which was interrogated by variable temperature NMR spectroscopy. In the solid-state, distorted coordination geometries are observed with the spacer skewed to one side of the Pd-Cl bond. In contrast, a static C2 symmetric structure is observed for the dodecamethylene based macrocycle. For comparison, palladium(II) fluoride analogues [PdF{CNC-(CH2)n}][BAr(F)4] (n = 8, 10, 12) were also prepared and their solution and solid-state structures contrasted with those of the chlorides. Notably, these complexes exhibit very low frequency (19)F chemical shifts (ca. -400 ppm) and the presence of C-H···F interactions ((2h)J(FC) coupling observed by (13)C NMR spectroscopy). The dynamic behaviour of the fluoride complexes is largely consistent with the smaller ancillary ligand; [PdF{CNC-(CH2)8}][BAr(F)4] exceptionally shows C(2v) time averaged symmetry in solution at room temperature (CD2Cl2, 500 MHz) as a consequence of dual fluxional processes of the pincer backbone and alkyl spacer. PMID:24201818

Andrew, Rhiann E; Chaplin, Adrian B

2014-01-21

462

Heterolytic activation of dihydrogen by platinum and palladium complexes.  

PubMed

Wide bite angle diphosphine ligands were used to prepare [(diphosphine)M(2-(diphenylphosphino)pyridine)](2+) complexes (M = Pd, Pt). Except for the ligand with the largest bite angle, 2-(diphenylphosphino)pyridine coordinates in a bidentate mode leading to bis-chelate complexes. In the case of Xantphos (9,9-dimethyl-4,5-bis(diphenylphosphino)-xanthene, ?n = 111°) two types of complexes are formed, in which 2-(diphenylphosphino)pyridine coordinates in a mono- or bidentate fashion, respectively. The crystal structures of three of the Pt complexes were determined. The X-ray crystal structure of [(Xantphos)-Pt(2-(diphenylphosphino)pyridine)](2+) shows that Xantphos coordinates in a tridentate P,O,P fashion. Under dihydrogen pressure, the pyridyl moiety in the platinum complexes can de-coordinate to provide a vacant coordination site at the metal center. Furthermore it can act as an internal base to assist the heterolytic cleavage of dihydrogen. The reaction yields a platinum hydride with a protonated pyridine moiety in close proximity to one another. The structure as well as the reactivity of the complexes towards dihydrogen is governed by the steric requirements of the diphosphines. The crystal structure of [(dppf)PtH(2-(diphenylphosphino)pyridinium)](OTf)2 has been determined. Palladium complexes containing DPEphos or Xantphos decompose under dihydrogen pressure. In the case of dppf slow heterolytic splitting of dihydrogen occurs to form the hydride complex [(dppf)PdH(2-(diphenylphosphino)pyridinium)](OTf)2 which contains a protonated 2-(diphenylphosphino)pyridine ligand. In solution, this compound slowly undergoes P-C bond cleavage of the 2-(diphenylphosphino)pyridine ligand to form [(dppf)Pd(PHPh2)(?(1)-C5H4NH)](OTf)2. When the 6-methyl-2-pyridyldiphenylphosphine ligand is used, the reaction of the palladium complex with dihydrogen is very fast and the hydride complex immediately rearranges to the diphenylphosphino compound resulting from P-C bond cleavage. PMID:23361515

Leñero, Karina Q Almeida; Guari, Yannick; Kamer, Paul C J; van Leeuwen, Piet W N M; Donnadieu, Bruno; Sabo-Etienne, Sylviane; Chaudret, Bruno; Lutz, Martin; Spek, Anthony L

2013-05-14

463

Palladium-catalyzed C-N cross-coupling and application to the synthesis of delayed singlet emitters for OLED development  

E-print Network

The studies in the present dissertation were aimed at developing and applying synthetic methods mediated by palladium catalysis. In Chapters 1 and 2, the palladium-catalyzed amidation and amination of five-membered ...

Su, Mingjuan

2014-01-01

464

Whole-Genome Sequence Analysis of the Naturally Competent Acinetobacter baumannii Clinical Isolate A118  

PubMed Central

Recent studies have demonstrated a high genomic plasticity in Acinetobacter baumannii, which may explain its high capacity to acquire multiple antibiotic resistance determinants and to survive in the hospital environment. Acinetobacter baumannii strain A118 (Ab A118) was isolated in the year 1995 from a blood culture of an intensive care unit patient. As this particular strain showed some peculiar characteristic such as being naturally competent and susceptible to numerous antibiotics, we performed whole-genome comparison (WGC) studies to gain insights into the nature and extent of the genomic differences. The Ab A118 genome is approximately 3,824 kb long with a 38.4% GC content and contains 3,520 coding sequences. WGC studies showed that the Ab A118 genome has 98% average nucleotide identity with that of A. baumannii ATCC 17978, and 96% average nucleotide identity with that of strains AYE and ACICU. At least 12 inversions, 275 insertions, and 626 deletions were identified when the Ab A118 genome was compared with those of strains ATCC 17978, AYE, and ACICU using MAUVE WGC. Multiple gene order arrangements were observed among the analyzed strains. MAUVE WGC analysis identified 19 conserved segments, known as locally colinear blocks. The number of single nucleotide polymorphisms found when comparing the Ab A118 genome with that of strains ATCC 17978, AYE, and ACICU was 43,784 (1.1496%), 44,130 (1.158%), and 43,914 (1.153%), respectively. Genes comEA, pilQ, pilD, pilF, comL, pilA, comEC, pilI, pilH, pilO, pilN, pilY1(comC), pilE, pilR, and comM, potentially involved in natural competence were found in the Ab A118 genome. In particular, unlike in most strains where comM is interrupted by an insertion of a resistance island (AbaR), in strain Ab A118 it is uninterrupted. PMID:25164683

Traglia, German M.; Chua, Katherina; Centron, Daniela; Tolmasky, Marcelo E.; Ramirez, Maria Soledad

2014-01-01

465

Degradation of a xenobiotic textile dye, Disperse Brown 118, by Brevibacillus laterosporus.  

PubMed

The toxic textile dye, Disperse Brown 118, was degraded by Brevibacillus laterosporus. 96% decolorization was achieved within 48 h at pH 7, 40 °C at 50 mg dye l(-1) accompanied by significant increases in the activities of veratryl alcohol oxidase, tyrosinase and NADH-DCIP reductase. HPTLC and FT-IR spectroscopy confirmed biodegradation after dye decolorization. As identified by GC-MS, biodegradation products of Disperse Brown 118 were N-carbamoyl-2-[(8-chloroquinazolin-4-yl)oxy] acetamide and N-carbamoyl-2-(quinazolin-4-yloxy)acetamide which were much less toxic than parent dye as evidenced by phytotoxicity tests. PMID:23794049

Kurade, Mayur B; Waghmode, Tatoba R; Kabra, Akhil N; Govindwar, Sanjay P

2013-10-01

466

Sampling and Analysis Instruction for Borehole Sampling at 118-B-1 Burial Ground  

SciTech Connect

The Washington Closure Hanford (WCH) Field Remediation Project has removed all of the disposed materials and contaminated soil from the 118-B-1 Burial Ground with the exception of tritium-contaminated soil that is believed to extend from the bottom of the present excavation to groundwater and is believed to contribute to tritium contamination observed at down-gradient monitoring Well 199-B8-6. This sampling and analysis instruction (SAI) provides the requirements for sample collection and laboratory analysis for characterization of the vertical distribution of tritium contamination in the vadose zone soil below the 118-B-1 Burial Ground remedial action excavation.

W. S. Thompson

2007-04-02

467

A highly sensitive disposable immunosensor through direct electro-reduction of oxygen catalyzed by palladium nanoparticle decorated carbon nanotube label  

Microsoft Academic Search

A palladium nanoparticle decorated carbon nanotube was designed as a label for preparation of a highly sensitive disposable immunosensor. The immunosensor was constructed by assembling the capture antibody on gold nanoparticles decorated graphene nanosheets modified screen printed carbon working electrode. With a sandwich immunoassay mode, the palladium nanoparticle decorated carbon nanotubes were captured to the immunocomplex and showed strong electrocatalytic

Chuan Leng; Jie Wu; Qiunan Xu; Guosong Lai; Huangxian Ju; Feng Yan

2011-01-01

468

Adsorption and Reaction of Formic Acid on a Pseudomorphic Palladium Monolayer on Chen Xu and D. W. Goodman*  

E-print Network

Adsorption and Reaction of Formic Acid on a Pseudomorphic Palladium Monolayer on Mo(110) Chen XuVed: April 28, 1995; In Final Form: September 8, 1995X The adsorption and reaction of formic acid, HCOOH-programmed desorption (TPD) and high-resolution electron energy loss spectroscopy (HREELS). On multilayer palladium

Goodman, Wayne

469

Generation of OH radicals at palladium oxide nanoparticle modified electrodes, and scavenging by fluorescent probes and antioxidants  

Microsoft Academic Search

The reduction of palladium oxide nanoparticles in the presence of hydrogen peroxide or dissolved oxygen gives rise to a catalytic reduction current dependent on the hydrogen peroxide concentration or the oxygen concentration. Using terephthalic acid as an OH radical scavenger yielding the fluorescent 2-hydroxyterephthalic acid, we demonstrate that the catalytic current stems from the freshly exposed palladium metal re-oxidation by

Jifeng Liu; Grégoire Lagger; Philippe Tacchini; Hubert H. Girault

2008-01-01

470

Landscape and Urban Planning 118 (2013) 2939 Contents lists available at ScienceDirect  

E-print Network

Landscape and Urban Planning 118 (2013) 29­39 Contents lists available at ScienceDirect Landscape and Urban Planning journal homepage: www.elsevier.com/locate/landurbplan Research paper Identifying neighborhood analysis explored creating larger spaces for farming. · Spaces exist to expand local food

Vermont, University of

471

hal-00207918,version1-18Jan2008 MOULD CALCULUS FOR HAMILTONIAN VECTOR FIELDS  

E-print Network

hal-00207918,version1-18Jan2008 MOULD CALCULUS FOR HAMILTONIAN VECTOR FIELDS by Jacky Cresson of a Hamiltonian vector field in cartesian coordinates. We prove that mould calculus can also produce successive- tion of a formal vector field without and within resonances. We enlighten the power of moulds

Paris-Sud XI, Université de

472

118 Recent & Best-Selling Titles * Not for sale in Pakistan  

E-print Network

, 95 Dawisha, 70 Dayan, 84 Death & Redemption, 86 Debtor Nation, 49 Delete, 60 Democratic Legitimacy118 Recent & Best-Selling Titles * Not for sale in Pakistan ** For sale only in the United States only in the United States and Canada *** Not for sale in South Asia For sale only in North America

Landweber, Laura

473

Preliminary tank characterization report for single-shell tank 241-TX-118: best-basis inventory  

SciTech Connect

An effort is underway to provide waste inventory estimates that will serve as standard characterization source terms for the various waste management activities. As part of this effort, an evaluation of available information for single-shell tank 241-TX-118 was performed, and a best-basis inventory was established. This work follows the methodology that was established by the standard inventory task.

Jo, J.

1997-09-02

474

DOI: 10.1542/peds.2005-1847 2006;118;1962-1970Pediatrics  

E-print Network

DOI: 10.1542/peds.2005-1847 2006;118;1962-1970Pediatrics Cottam, Sarah E. Bush and Dale H. Clayton Treatment for Head Lice: A Lot of Hot Air This information is current as of November 3, 2006 http://www.pediatrics, Illinois, 60007. Copyright © 2006 by the American Academy of Pediatrics. All and trademarked

Clayton, Dale H.

475

Male circumcision, religion, and infectious diseases: an ecologic analysis of 118 developing countries  

Microsoft Academic Search

BACKGROUND: Both religious practices and male circumcision (MC) have been associated with HIV and other sexually-transmitted infectious diseases. Most studies have been limited in size and have not adequately controlled for religion, so these relationships remain unclear. METHODS: We evaluated relationships between MC prevalence, Muslim and Christian religion, and 7 infectious diseases using country-specific data among 118 developing countries. We

Paul K Drain; Daniel T Halperin; James P Hughes; Jeffrey D Klausner; Robert C Bailey

2006-01-01

476

12 CFR 225.118 - Computer services for customers of subsidiary banks.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Computer services for customers of subsidiary...Companies Interpretations § 225.118 Computer services for customers of subsidiary...presented that the service company owns a computer which it utilizes to furnish...

2013-01-01

477

12 CFR 225.118 - Computer services for customers of subsidiary banks.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Computer services for customers of subsidiary...Companies Interpretations § 225.118 Computer services for customers of subsidiary...presented that the service company owns a computer which it utilizes to furnish...

2012-01-01

478

12 CFR 225.118 - Computer services for customers of subsidiary banks.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Computer services for customers of subsidiary...Companies Interpretations § 225.118 Computer services for customers of subsidiary...presented that the service company owns a computer which it utilizes to furnish...

2010-01-01

479

12 CFR 225.118 - Computer services for customers of subsidiary banks.  

...2014-01-01 2014-01-01 false Computer services for customers of subsidiary...Companies Interpretations § 225.118 Computer services for customers of subsidiary...presented that the service company owns a computer which it utilizes to furnish...

2014-01-01

480

12 CFR 225.118 - Computer services for customers of subsidiary banks.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Computer services for customers of subsidiary...Companies Interpretations § 225.118 Computer services for customers of subsidiary...presented that the service company owns a computer which it utilizes to furnish...

2011-01-01

481

Phytologia (April 2012) 94(1)118 GEOGRAPHIC VARIATION IN THE LEAF ESSENTIAL OILS  

E-print Network

Phytologia (April 2012) 94(1)118 GEOGRAPHIC VARIATION IN THE LEAF ESSENTIAL OILS OF JUNIPERUS OSTEOSPERMA (CUPRESSACEAE) II. Robert P. Adams Biology Department, Baylor University, Box 97388, Waco, TX 76798, USA email Robert_Adams@baylor.edu ABSTRACT The volatile leaf oils of J. osteosperma were analyzed

Adams, Robert P.

482

ccsd-00095586,version1-18Sep2006 Dynamic bandwidth Reservation in Virtual Private  

E-print Network

ccsd-00095586,version1-18Sep2006 Dynamic bandwidth Reservation in Virtual Private Network under.lecadre@enst-bretagne.fr Abstract - The aim of this paper is to analyze the dynamic evolution of a Virtual Private Network for every Virtual Private Network. Whereas, at the global level of the links, decisions should be taken

Paris-Sud XI, Université de

483

Physical retrieval of precipitation cell parameters using passive 118-GHz observations  

NASA Technical Reports Server (NTRS)

Physical retrieval of precipitation parameters from 118-GHz spectra is investigated using an iterative planar-stratified numerical radiative-transfer model. Liquid and frozen hydrometeors are modeled as spherical Marshall-Palmer and Sekhon-Srivastava (SS) distributed Mie-scattering polydispersions, respectively, with Henyey-Greenstein phase functions. A comparison of 118-GHz rain-cell spectral perturbations observed during Cohmex with model calculations based on coincident radar data yields + or - 10 percent agreement over the convective core region, although a mean ice size 50 percent larger than that given by the SS distribution is required for agreement over the anvil region. A rain-cell model parameterized by top-altitude and total water density suggests that the dominant 118-GHz spectral modes can be used to retrieve top-layer altitude with rms errors of about 1-1.5 km, consistent with statistical retrieval results. Model calculations also suggest that cell density is not observable using 118-GHz spectra alone.

Gasiewski, A. J.; Staelin, D. H.

1989-01-01

484

ASME Journal of Heat Transfer Vol.118, pp.592-598, 1996  

E-print Network

ASME Journal of Heat Transfer Vol.118, pp.592-598, 1996 OSCILLATORY HEAT TRANSFER IN A PIPE for laminar forced convection in a long pipe heated by uniform heat flux and subjected to a reciprocating flow for the numerical simulation of the hydrodynamically and thermally developing reciprocating flow in the heated pipe

Zhao, Tianshou

485

7 CFR 1955.118 - Processing cash sales or MFH credit sales on NP terms.  

Code of Federal Regulations, 2010 CFR

...Property § 1955.118 Processing cash sales or MFH credit...acceptance is made prior to processing a request for credit on NP terms. (2) Processing. Purchasers requesting...stability, repayment ability, and creditworthiness...discretion to determine what information is required...

2010-01-01

486

19 CFR 118.22 - Notice of immediate suspension or proposed revocation and cancellation action.  

Code of Federal Regulations, 2012 CFR

...TREASURY CENTRALIZED EXAMINATION STATIONS Termination of a CES § 118.22 Notice of immediate suspension or proposed revocation...written notice on the operator or entity selected to operate the CES. The notice shall be in the form of a statement...

2012-04-01

487

19 CFR 118.22 - Notice of immediate suspension or proposed revocation and cancellation action.  

...TREASURY CENTRALIZED EXAMINATION STATIONS Termination of a CES § 118.22 Notice of immediate suspension or proposed revocation...written notice on the operator or entity selected to operate the CES. The notice shall be in the form of a statement...

2014-04-01

488

19 CFR 118.22 - Notice of immediate suspension or proposed revocation and cancellation action.  

Code of Federal Regulations, 2011 CFR

...TREASURY CENTRALIZED EXAMINATION STATIONS Termination of a CES § 118.22 Notice of immediate suspension or proposed revocation...written notice on the operator or entity selected to operate the CES. The notice shall be in the form of a statement...

2011-04-01

489

19 CFR 118.22 - Notice of immediate suspension or proposed revocation and cancellation action.  

Code of Federal Regulations, 2013 CFR

...TREASURY CENTRALIZED EXAMINATION STATIONS Termination of a CES § 118.22 Notice of immediate suspension or proposed revocation...written notice on the operator or entity selected to operate the CES. The notice shall be in the form of a statement...

2013-04-01

490

19 CFR 118.22 - Notice of immediate suspension or proposed revocation and cancellation action.  

Code of Federal Regulations, 2010 CFR

...TREASURY CENTRALIZED EXAMINATION STATIONS Termination of a CES § 118.22 Notice of immediate suspension or proposed revocation...written notice on the operator or entity selected to operate the CES. The notice shall be in the form of a statement...

2010-04-01

491

Quantum Mechanics I -Fall 2007 PHYS 916 MWF 10:30-11:20 Brace 118  

E-print Network

Quantum Mechanics I - Fall 2007 PHYS 916 MWF 10:30-11:20 Brace 118 Instructor: Prof. Kirill. I will respond by email or in class. Textbook: R. Shankar, Principles of Quantum Mechanics, 2nd description: This is the first graduate course in quantum mechanics. We will generally follow the textbook

Farritor, Shane

492

Progress In Electromagnetics Research, Vol. 118, 441459, 2011 ATTENUATION IN EXTENDED STRUCTURES  

E-print Network

in terms of S.E. and R.L., strictly speaking, is applicable only to far fields and radar absorbingProgress In Electromagnetics Research, Vol. 118, 441­459, 2011 ATTENUATION IN EXTENDED STRUCTURES COATED WITH THIN MAGNETO-DIELECTRIC ABSORBER LAYER M. Y. Koledintseva1, *, A. G. Razmadze1, A. Y. Gafarov

Koledintseva, Marina Y.

493

research highlights 118 | VOL.6 NO.2 | FEBRUARY 2009 | nature methods  

E-print Network

research highlights 118 | VOL.6 NO.2 | FEBRUARY 2009 | nature methods stem cells When is a stem cell specified? Using time-lapse imaging, researchers study the potency and fate specification of live neural stem cells in culture. "One of the most interesting things that stem cells do," says Ron Mc

Cai, Long

494

46 CFR 118.420 - Pre-engineered fixed gas fire extinguishing systems.  

Code of Federal Regulations, 2010 CFR

...Detecting Systems § 118.420 Pre-engineered fixed gas fire extinguishing systems. (a) A pre-engineered fixed gas fire extinguishing...addition to automatic actuation by a heat detector; (3) Automatically... (b) A vessel on which a pre-engineered fixed gas...

2010-10-01

495

46 CFR 118.420 - Pre-engineered fixed gas fire extinguishing systems.  

Code of Federal Regulations, 2011 CFR

...Detecting Systems § 118.420 Pre-engineered fixed gas fire extinguishing systems. (a) A pre-engineered fixed gas fire extinguishing...addition to automatic actuation by a heat detector; (3) Automatically... (b) A vessel on which a pre-engineered fixed gas...

2011-10-01

496

46 CFR 118.420 - Pre-engineered fixed gas fire extinguishing systems.  

Code of Federal Regulations, 2013 CFR

...Detecting Systems § 118.420 Pre-engineered fixed gas fire extinguishing systems. (a) A pre-engineered fixed gas fire extinguishing...addition to automatic actuation by a heat detector; (3) Automatically... (b) A vessel on which a pre-engineered fixed gas...

2013-10-01

497

46 CFR 118.420 - Pre-engineered fixed gas fire extinguishing systems.  

Code of Federal Regulations, 2012 CFR

...Detecting Systems § 118.420 Pre-engineered fixed gas fire extinguishing systems. (a) A pre-engineered fixed gas fire extinguishing...addition to automatic actuation by a heat detector; (3) Automatically... (b) A vessel on which a pre-engineered fixed gas...

2012-10-01

498

Cleanup Verification Package for the 118-C-1, 105-C Solid Waste Burial Ground  

SciTech Connect

This cleanup verification package documents completion of remedial action for the 118-C-1, 105-C Solid Waste Burial Ground. This waste site was the primary burial ground for general wastes from the operation of the 105-C Reactor and received process tubes, aluminum fuel spacers, control rods, reactor hardware, spent nuclear fuel and soft wastes.

M. J. Appel and J. M. Capron

2007-07-25

499

Increases in estrogen receptor-concentration in breast cancer cells promote serine 118/104/106-  

E-print Network

Increases in estrogen receptor- concentration in breast cancer cells promote serine 118 of Wisconsin-Madison, Madison, Wisconsin, USA; and *The Breast Center and Department of Medicine, Baylor College of Medicine, Houston, Texas, USA ABSTRACT A common phenotype in breast cancer is the expansion

Alarid, Elaine T.

500

democrite-00023911,version1-18Mar2005 Analogy between free electron laser  

E-print Network

democrite-00023911,version1-18Mar2005 Analogy between free electron laser and channeling by crystal, which governs a free electron laser or inverse free electron laser at high gain, is analogous-tapered free electron laser. This analogy is different from the well-known one between channeling and undulator

Boyer, Edmond