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1

Separation of carrier free 151,152Tb produced in 16O irradiated lanthanum oxide matrix.  

PubMed

Charged particle activation of natural La2O3 with approximately 78.5 MeV 16O results in the formation of carrier free 151,152Tb isotopes in the matrix. The liquid cation exchanger, HDEHP, has effectively been utilised as an extractant in the quantitative separation of the activation products from the bulk target matrix of lanthanum oxide. PMID:10581678

Nayak, D; Lahiri, S; Ramaswami, A; Manohar, S B; Das, N R

1999-12-01

2

Lanthanum  

MedlinePLUS

... or any of the ingredients in lanthanum chewable tablets. Ask your pharmacist for a list of the ingredients.tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. ...

3

14 CFR 27.151 - Flight controls.  

Code of Federal Regulations, 2010 CFR

...2014-01-01 2014-01-01 false Flight controls. 27.151 Section 27.151 Aeronautics...STANDARDS: NORMAL CATEGORY ROTORCRAFT Flight Flight Characteristics § 27.151 Flight controls. (a) Longitudinal, lateral,...

2014-01-01

4

14 CFR 29.151 - Flight controls.  

Code of Federal Regulations, 2010 CFR

...2014-01-01 2014-01-01 false Flight controls. 29.151 Section 29.151 Aeronautics...TRANSPORT CATEGORY ROTORCRAFT Flight Flight Characteristics § 29.151 Flight controls. (a) Longitudinal, lateral,...

2014-01-01

5

19 CFR 151.52 - Sampling procedures.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Sampling procedures. 151.52 Section 151...TREASURY (CONTINUED) EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Metal-Bearing...Metal-Bearing Materials § 151.52 Sampling procedures. (a) Commercial...

2013-04-01

6

19 CFR 151.51 - Sampling requirements.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Sampling requirements. 151.51 Section 151...TREASURY (CONTINUED) EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Metal-Bearing...Metal-Bearing Materials § 151.51 Sampling requirements. (a)...

2013-04-01

7

Aerosol generation of lanthanum aluminate  

SciTech Connect

Spherical lanthanum aluminate powders approximately [mu]m in diameter were produced using spray pyrolysis techniques. These materials were characterized by Z-ray diffractometry and scanning electron microscopy. Two intermediate products were produced and identified as lanthanum oxide and aluminum oxide. These intermediates were present in varying amounts in all of the aerosol-furnace-prepared materials and reflect the short residence time of the aerosols in the furnace. Samples of each aerosol-furnace preparation were further annealed in air for 1 h at 1100 C, and all of them converted completely to lanthanum aluminate.

Lux, B.C.; Clark, R.D.; Salazar, A.; Sveum, L.K.; Krebs, M.A. (New Mexico Highlands Univ., Las Vegas, NM (United States). School of Science and Engineering, Dept. of Physical Sciences)

1993-10-01

8

Metallic behavior of lanthanum disilicide  

NASA Technical Reports Server (NTRS)

Polycrystalline thin films of LaSi2 were prepared by reaction of sputter-deposited lanthanum layers with silicon wafers. Samples of the low-temperature tetragonal and the high-temperature orthorhombic phases were separately obtained. The room-temperature intrinsic resistivities were 24 and 57 microohm cm for the low- and high-temperature structures, respectively. Although lanthanum disilicide had been previously reported to be a semiconductor, classical metallic behavior was found for both phases.

Long, Robert G.; Bost, M. C.; Mahan, John E.

1988-01-01

9

Lanthanum Bromide Detectors for Safeguards Measurements  

SciTech Connect

Lanthanum bromide has advantages over other popular inorganic scintillator detectors. Lanthanum bromide offers superior resolution, and good efficiency when compared to sodium iodide and lanthanum chloride. It is a good alternative to high purity germanium detectors for some safeguards applications. This paper offers an initial look at lanthanum bromide detectors. Resolution of lanthanum bromide will be compared lanthanum chloride and sodium-iodide detectors through check source measurements. Relative efficiency and angular dependence will be looked at. Nuclear material spectra, to include plutonium and highly enriched uranium, will be compared between detector types.

Wright, J.

2011-05-25

10

[Lanthanum carbonate in clinical practice].  

PubMed

Lanthanum is an element belonging to the group called rare earths. Due to its low solubility, lanthanum carbonate has been widely studied as an intestinal phosphate binder. The results of different clinical trials show that it is an effective and well-tolerated phosphate binder used in monotherapy. Serum phosphate levels are controlled in approximately 70% of patients at 5 years without causing hypercalcemia. The only significant adverse effects observed are a low percentage of gastrointestinal disturbances (6%). Lanthanum carbonate does not alter serum values of liposoluble vitamins or affect the pharmacokinetics of digoxin, warfarin, furosemide, phenytoin, ACE inhibitors or beta-blockers. However, it does alter the pharmacokinetics of ciprofloxacin (quinolones in general), tetracyclines and doxycycline. Lanthanum carbonate (Fosrenol) is available in Spain as 500 mg, 750 mg, and 1,000 mg chewable tablets, which should not be swallowed without chewing to avoid loss of efficacy. The initial dose recommended by the WHO is 2,250 mg/day, which is equivalent to one 750 mg at each meal. Lanthanum carbonate or lanthanum phosphate can be clearly visualized on a plain x-ray of the abdomen in patients who have recently ingested it. In summary, lanthanum carbonate is a widely studied potent phosphate binder, which offers the possibility of improving control of serum phosphate in patients with chronic kidney disease, without significant side effects. The fact that it is available as chewable tablets and that the number of daily tablets required has been significantly reduced will probably facilitate better patient compliance. PMID:18847414

Torregrosa Prats, V

2008-01-01

11

Thermodynamic properties of higher lanthanum silicide  

Microsoft Academic Search

The thermodynamic properties of lanthanum disilicide were examined for the first time in the 960-1050°K range by measuring the electromotive force of a galvanic cell based on LaSn, the chlorides of potassium, sodium, and lanthanum, and lanthanum silicide and silicon. Reference electrodes were used to prevent lanthanum interaction with the electrolyte. The alloys were melted in an electric arc furnace

R. I. Polotskaya

1988-01-01

12

25 CFR 151.15 - Information collection.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Information collection. 151.15 Section...DEPARTMENT OF THE INTERIOR LAND AND WATER LAND ACQUISITIONS § 151.15 Information collection. (a) The information collection requirements...

2013-04-01

13

46 CFR 151.50-60 - Benzene.  

Code of Federal Regulations, 2013 CFR

... Shipping 5 2013-10-01 2013-10-01 false Benzene. 151.50-60 Section 151.50-60 Shipping COAST...MATERIAL CARGOES Special Requirements § 151.50-60 Benzene. The person in charge of a Coast Guard inspected...

2013-10-01

14

46 CFR 151.03-39 - Ocean.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Ocean. 151.03-39 Section 151.03-39...CARGOES Definitions § 151.03-39 Ocean. A designation for all vessels normally navigating the waters of any ocean or the Gulf of Mexico more than 20...

2013-10-01

15

33 CFR 151.29 - Foreign ships.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Foreign ships. 151.29 Section 151.29 Navigation...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution 151.29 Foreign ships. (a) Each oil tanker of 150 gross...

2010-07-01

16

33 CFR 151.29 - Foreign ships.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Foreign ships. 151.29 Section 151.29 Navigation...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution 151.29 Foreign ships. (a) Each oil tanker of 150 gross...

2012-07-01

17

33 CFR 151.29 - Foreign ships.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Foreign ships. 151.29 Section 151.29 Navigation...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution 151.29 Foreign ships. (a) Each oil tanker of 150 gross...

2011-07-01

18

25 CFR 151.15 - Information collection.  

Code of Federal Regulations, 2011 CFR

...9; 151.10; 151.11(c), and 151.13 have been approved by the Office of Management and Budget under 44 U.S.C. 3501 et seq. and assigned clearance number 1076-0100. This information is being collected to acquire land into trust on...

2011-04-01

19

46 CFR 151.03-19 - Environment.  

Code of Federal Regulations, 2013 CFR

... Shipping 5 2013-10-01 2013-10-01 false Environment. 151.03-19 Section 151.03-19 Shipping ...HAZARDOUS MATERIAL CARGOES Definitions § 151.03-19 Environment. This term refers to the atmosphere within a cargo...

2013-10-01

20

33 CFR 151.29 - Foreign ships.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Foreign ships. 151.29 Section 151.29 Navigation...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.29 Foreign ships. (a) Each oil tanker of 150 gross...

2013-07-01

21

49 CFR 192.151 - Tapping.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 2009-10-01 false Tapping. 192.151 Section 192.151 Transportation...of Pipeline Components § 192.151 Tapping. (a) Each mechanical fitting used...outside-sealing service connections, tapping saddles, or other fixtures must be...

2009-10-01

22

49 CFR 192.151 - Tapping.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Tapping. 192.151 Section 192.151 Transportation...of Pipeline Components § 192.151 Tapping. (a) Each mechanical fitting used...outside-sealing service connections, tapping saddles, or other fixtures must be...

2010-10-01

23

14 CFR Appendix F to Part 151 - Appendix F to Part 151  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 false Appendix F to Part 151 F Appendix F to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. F Appendix F to Part 151 There is...

2009-01-01

24

14 CFR Appendix D to Part 151 - Appendix D to Part 151  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Appendix D to Part 151 D Appendix D to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. D Appendix D to Part 151 There is...

2010-01-01

25

14 CFR Appendix H to Part 151 - Appendix H to Part 151  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 false Appendix H to Part 151 H Appendix H to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. H Appendix H to Part 151 There...

2009-01-01

26

14 CFR Appendix E to Part 151 - Appendix E to Part 151  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Appendix E to Part 151 E Appendix E to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. E Appendix E to Part 151 There is...

2010-01-01

27

14 CFR Appendix I to Part 151 - Appendix I to Part 151  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Appendix I to Part 151 I Appendix I to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. I Appendix I to Part 151 [Lists of...

2010-01-01

28

14 CFR Appendix D to Part 151 - Appendix D to Part 151  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 false Appendix D to Part 151 D Appendix D to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. D Appendix D to Part 151 There is...

2009-01-01

29

14 CFR Appendix H to Part 151 - Appendix H to Part 151  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Appendix H to Part 151 H Appendix H to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. H Appendix H to Part 151 There...

2010-01-01

30

14 CFR Appendix E to Part 151 - Appendix E to Part 151  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 false Appendix E to Part 151 E Appendix E to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. E Appendix E to Part 151 There is...

2009-01-01

31

14 CFR Appendix A to Part 151 - Appendix A to Part 151  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 false Appendix A to Part 151 A Appendix A to Part 151 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION...CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Pt. 151, App. A Appendix A to Part 151 There is...

2009-01-01

32

Ultrasonic Attenuation in Lanthanum Monochalcogenides  

Microsoft Academic Search

Ultrasonic attenuation due to phonon-phonon interaction and thermoelastic relaxation are studied in Lanthanum Monochalcogenides in direction at different higher temperatures. For evaluation of ultrasonic absorption coefficients the second and third order elastic constants (SOEC) and (TOEC) are also calculated. Shear wave attenuation shows maximum along propagation direction with polarized along and the attenuation increases at higher temperatures. Thermo-elastic loss is

Raja Ram Yadav; Devraj Singh

2001-01-01

33

Ames Lab 101: Lanthanum Decanting  

SciTech Connect

Ames Laboratory scientist Trevor Riedemann explains the process that allows Ames Laboratory to produce some of the purest lanthanum in the world. This and other high-purity rare-earth elements are used to create alloys used in various research projects and play a crucial role in the Planck satellite mission.

Riedemann, Trevor

2010-01-01

34

Ames Lab 101: Lanthanum Decanting  

ScienceCinema

Ames Laboratory scientist Trevor Riedemann explains the process that allows Ames Laboratory to produce some of the purest lanthanum in the world. This and other high-purity rare-earth elements are used to create alloys used in various research projects and play a crucial role in the Planck satellite mission.

Riedemann, Trevor

2012-08-29

35

33 CFR 151.77 - Exceptions for emergencies.  

Code of Federal Regulations, 2012 CFR

...CFR 151.71) Fixed or floatingplatforms & assoc. vessels 3 (33 CFR 151.73) Plasticsincludes synthetic ropes and fishing nets and plastic bags Disposal prohibited (33 CFR 151.67) Disposal prohibited (33 CFR 151.67)...

2012-07-01

36

19 CFR 151.43 - [Reserved  

Code of Federal Regulations, 2013 CFR

...S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Petroleum and Petroleum Products § 151.43...

2013-04-01

37

Sintering aid for lanthanum chromite refractories  

SciTech Connect

A method of forming an electronically conductive, integral layer including lanthanum chromite is described comprising: depositing a layer including particulate lanthanum chromite containing a minor fraction of a sintering acid which includes a eutectic affording composition of at least two components providing a minor portion of a liquid phase in the layer during the sintering step, and eutectic affording composition having a melting point substantially below the melting point of the lanthanum chromite; sintering the layer at a sufficiently high temperature of not more than 1800/sup 0/K to form and densify an integral layer including lanthanum chromite.

Flandermeyer, B.K.; Poeppel, R.B.; Ellyn, G.; Dusek, J.T.; Anderson, H.U.

1988-06-07

38

Infrared absorption of lanthanum manganites  

NASA Astrophysics Data System (ADS)

Phonon energies in lanthanum manganites have been determined by dispersing powder in alkali halide matrices and measuring the absorption of far-infrared radiation. The method is illustrated with the classic colossal magneto-resistance material La 0.7Ca 0.3MnO 3. Relative to this, phonon energies associated with the Mn site are found to increase as Li is substituted for Mn. In the absence of Ca substituting for La, a new phonon mode is observed.

Gao, F.; Lewis, R. A.; Wang, X. L.; Dou, S. X.

39

Radiation Effects in Lanthanum Pyrozirconate  

SciTech Connect

The present paper reviews recent results on radiation resistance of lanthanum pyrozirconate obtained using empirical potentials molecular dynamic simulations. First, displacement cascades (DCs) with a 6 keV U4+ cation representing the ?- recoil nucleus have been performed in the lanthanum pyrozirconate La2Zr2O7. Only point defects are observed after each DC. They represent on average only 10% of the total number of displaced atoms during the cascade, with two times more cation anti-sites than Frenkel pairs. These calculations indicate that amorphization does not occur by a direct impact mechanism in pyrozirconate. Second, consequences of point defects accumulation have been simulated by introducing different types--either cation anti-sites or Frenkel pairs--and concentrations of point defects in pyrochlore. Results show that cation Frenkel pairs accumulation is the driving force for lanthanum zirconate amorphization. Under cation Frenkel pair accumulation, the crystal transits first from the pyrochlore to the disordered fluorite structure, with the oxygen atoms simply rearranging around cations. Amorphization occurs as a second step. These results consequently provide atomic-level interpretation to experimental irradiation observations of a two-step phase transition.

Chartier, Alan; Crocombette, J.-P.; Meis, Constantin; Weber, William J.; Corrales, Louis R.

2006-09-01

40

33 CFR 151.09 - Applicability.  

Code of Federal Regulations, 2013 CFR

...e) Section 151.26(b)(5) applies to all vessels subject to the jurisdiction of the United States and operating in Antarctica. Note to § 151.09(c )(3): The term internal waters is defined in § 2.24 of this chapter. [CGD...

2013-07-01

41

33 CFR 151.09 - Applicability.  

Code of Federal Regulations, 2010 CFR

...e) Section 151.26(b)(5) applies to all vessels subject to the jurisdiction of the United States and operating in Antarctica. Note to 151.09(c)(3) : The term internal waters is defined in 2.24 of this chapter. [CGD...

2010-07-01

42

33 CFR 151.09 - Applicability.  

Code of Federal Regulations, 2011 CFR

...e) Section 151.26(b)(5) applies to all vessels subject to the jurisdiction of the United States and operating in Antarctica. Note to 151.09(c )(3): The term internal waters is defined in 2.24 of this chapter. [CGD...

2011-07-01

43

33 CFR 151.09 - Applicability.  

Code of Federal Regulations, 2012 CFR

...e) Section 151.26(b)(5) applies to all vessels subject to the jurisdiction of the United States and operating in Antarctica. Note to 151.09(c )(3): The term internal waters is defined in 2.24 of this chapter. [CGD...

2012-07-01

44

Half-life of Sm151 remeasured  

NASA Astrophysics Data System (ADS)

The half-life of Sm151 was redetermined and compared with literature values. A 151Sm2O3 sample was produced by exposing 150Sm2O3 to the high neutron flux of the heavy water research reactor at the China Institute of Atomic Energy (CIAE). The number of atoms and the activity of Sm151 in the sample were measured by thermal ionization mass spectrometry (TIMS) and liquid scintillation counting (LSC), respectively. The half-life of Sm151 determined in this work is 96.6 yr, with a standard uncertainty of 2.4 yr based on a quadratic summation of the uncertainty components from the measurements of the number of atoms and the activity of Sm151.

He, Ming; Shen, Hongtao; Shi, Guozhu; Yin, Xinyi; Tian, Weizhi; Jiang, Shan

2009-12-01

45

Dimensional instability of doped lanthanum chromite  

Microsoft Academic Search

Lattice expansion phase stability, and dimensional stability of doped lanthanum chromites have been examined over a wide range of temperatures and oxygen partial pressures. Reduction of doped lanthanum chromite resulted in a linear expansion of the sample that was dependent on the acceptor (Sr, Ca) concentration, temperature, oxygen partial pressure, and oxygen content within the sample. Additional doping with aliovalent

Timothy R. Armstrong; J. W. Stevenson; L. R. Pederson; P. E. Raney

1996-01-01

46

Ultrasonic Attenuation in Lanthanum Monochalcogenides  

NASA Astrophysics Data System (ADS)

Ultrasonic attenuation due to phonon-phonon interaction and thermoelastic relaxation are studied in Lanthanum Monochalcogenides in <110> direction at different higher temperatures. For evaluation of ultrasonic absorption coefficients the second and third order elastic constants (SOEC) and (TOEC) are also calculated. Shear wave attenuation shows maximum along <110> propagation direction with polarized along <110> and the attenuation increases at higher temperatures. Thermo-elastic loss is very small compared to phonon-viscosity loss. Behavior of temperature dependence of the absorption is the same as in case of pure metals and dielectric crystals.

Yadav, Raja; Singh, Devraj

2001-06-01

47

46 CFR 151.50-6 - Motor fuel antiknock compounds.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Motor fuel antiknock compounds. 151.50-6 Section 151.50-6... § 151.50-6 Motor fuel antiknock compounds. When transporting motor fuel antiknock compounds containing tetraethyl lead and...

2013-10-01

48

17 CFR 151.7 - Aggregation of positions.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Aggregation of positions. 151.7 Section 151.7 Commodity...COMMODITY FUTURES TRADING COMMISSION POSITION LIMITS FOR FUTURES AND SWAPS § 151.7 Aggregation of positions. (a) Positions to be...

2013-04-01

49

33 CFR 151.75 - Grinders or comminuters.  

Code of Federal Regulations, 2010 CFR

...2 2009-07-01 2009-07-01 false Grinders or comminuters. 151.75 Section 151.75... Garbage Pollution and Sewage § 151.75 Grinders or comminuters. Each grinder or comminuter used to discharge garbage in...

2009-07-01

50

33 CFR 151.75 - Grinders or comminuters.  

Code of Federal Regulations, 2010 CFR

...2 2010-07-01 2010-07-01 false Grinders or comminuters. 151.75 Section 151.75... Garbage Pollution and Sewage § 151.75 Grinders or comminuters. Each grinder or comminuter used to discharge garbage in...

2010-07-01

51

30 CFR 1202.151 - Royalty on processed gas.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Royalty on processed gas. 1202.151 Section 1202.151 Mineral Resources OFFICE OF NATURAL RESOURCES REVENUE, DEPARTMENT OF THE...RESOURCES REVENUE ROYALTIES Federal Gas § 1202.151 Royalty on...

2013-07-01

52

33 CFR 151.77 - Exceptions for emergencies.  

Code of Federal Regulations, 2011 CFR

...CFR 151.71) Fixed or Floating Platforms & Assoc. Vessels 3 (33 CFR 151.73) Plasticsincludes synthetic ropes and fishing nets and plastic bags. Disposal prohibited(33 CFR 151.67). Disposal prohibited(33 CFR...

2011-07-01

53

15 CFR 930.151 - Interstate coastal effect.  

Code of Federal Regulations, 2010 CFR

... 2009-01-01 false Interstate coastal effect. 930.151 Section 930.151 Commerce...Federal Activities Having Interstate Coastal Effects § 930.151 Interstate coastal effect. The term interstate coastal...

2009-01-01

54

15 CFR 930.151 - Interstate coastal effect.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Interstate coastal effect. 930.151 Section 930.151 Commerce...Federal Activities Having Interstate Coastal Effects § 930.151 Interstate coastal effect. The term interstate coastal...

2010-01-01

55

19 CFR 151.83 - Method of sampling.  

Code of Federal Regulations, 2013 CFR

... 2013-04-01 false Method of sampling. 151.83 Section 151.83 Customs...TREASURY (CONTINUED) EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Cotton § 151.83 Method of sampling. For determining the staple...

2013-04-01

56

34 CFR 668.151 - Administration of tests.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Administration of tests. 668.151 Section 668.151 Education... Approval of Independently Administered Tests; Specification of Passing Score; Approval...Process § 668.151 Administration of tests. (a)(1) To establish a...

2013-07-01

57

27 CFR 19.151 - General.  

Code of Federal Regulations, 2013 CFR

27 Alcohol, Tobacco Products and Firearms 1 2013-04-01...151 Alcohol, Tobacco Products and Firearms ALCOHOL AND...proprietor fails to pay any liability covered by a bond, TTB...corporation includes a Limited Liability Company (LLC) or...

2013-04-01

58

50 CFR 216.151 - Effective dates.  

Code of Federal Regulations, 2013 CFR

...TAKING AND IMPORTING OF MARINE MAMMALS Taking Of Marine Mammals Incidental To Missile Launch Activities from San Nicolas Island, CA § 216.151 Effective dates. This subpart is effective June 2, 2009 through June 2,...

2013-10-01

59

7 CFR 4280.151 - [Reserved  

...SERVICE AND RURAL UTILITIES SERVICE, DEPARTMENT OF AGRICULTURE LOANS AND GRANTS Rural Energy for America Program General Renewable Energy System and Energy Efficiency Improvement Guaranteed Loans 4280.151...

2014-01-01

60

44 CFR 151.02 - Scope.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY FIRE PREVENTION AND CONTROL REIMBURSEMENT...Definitions § 151.02 Scope. Fire services, in any State, may...normal operating costs incurred while fighting a fire on property which is under...

2013-10-01

61

46 CFR 151.45-3 - Manning.  

Code of Federal Regulations, 2013 CFR

...CONTINUED) CERTAIN BULK DANGEROUS CARGOES BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES Operations § 151.45-3 ...Inspection, such manning is necessary for the protection of life and property and for safe operation of the vessel. Vessels requiring...

2013-10-01

62

46 CFR 151.03-17 - Compatible.  

Code of Federal Regulations, 2013 CFR

...CONTINUED) CERTAIN BULK DANGEROUS CARGOES BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES Definitions § 151.03-17...prime considerations are the chemical, physical, or thermal properties of the reaction including heat, pressure, toxicity,...

2013-10-01

63

33 CFR 151.1500 - Purpose.  

Code of Federal Regulations, 2013 CFR

...COMMERCIAL WASTE, AND BALLAST WATER Ballast Water Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1500 Purpose. The purpose of this subpart is to implement the provisions of the Nonindigenous...

2013-07-01

64

33 CFR 151.1516 - Compliance monitoring.  

Code of Federal Regulations, 2013 CFR

...COMMERCIAL WASTE, AND BALLAST WATER Ballast Water Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1516 Compliance monitoring. (a) The master of each vessel equipped with ballast tanks must...

2013-07-01

65

33 CFR 151.1514 - Vessel safety.  

Code of Federal Regulations, 2013 CFR

...COMMERCIAL WASTE, AND BALLAST WATER Ballast Water Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1514 Vessel safety. Nothing in this subpart relieves the master of the responsibility for...

2013-07-01

66

33 CFR 151.1502 - Applicability.  

Code of Federal Regulations, 2013 CFR

...Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1502 Applicability. This subpart...navigates north of the George Washington Bridge on the Hudson River, regardless of other port calls in the United...

2013-07-01

67

33 CFR 151.1505 - Severability.  

Code of Federal Regulations, 2013 CFR

...COMMERCIAL WASTE, AND BALLAST WATER Ballast Water Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1505 Severability. If a court finds any portion of this subpart to have been promulgated without...

2013-07-01

68

19 CFR 191.151 - Drawback allowance.  

Code of Federal Regulations, 2013 CFR

...Exported From Continuous Customs Custody § 191.151...remained continuously in bonded warehouse or otherwise in Customs custody for a period...remained continuously in bonded warehouse or otherwise in Customs custody since...

2013-04-01

69

40 CFR 205.151 - Definitions.  

Code of Federal Regulations, 2013 CFR

...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) NOISE ABATEMENT PROGRAMS TRANSPORTATION EQUIPMENT NOISE EMISSION CONTROLS Motorcycles § 205.151...16) Failing vehicle means a vehicle whose noise level is in excess of the applicable...

2013-07-01

70

19 CFR 151.44 - Storage tanks.  

Code of Federal Regulations, 2013 CFR

...MERCHANDISE Petroleum and Petroleum Products § 151.44 Storage tanks...tables. When petroleum or petroleum products subject to duty...storage of imported petroleum or petroleum products. (b) Tags required...

2013-04-01

71

14 CFR 171.151 - Scope.  

...Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) NAVIGATIONAL FACILITIES NON-FEDERAL NAVIGATION FACILITIES Distance Measuring Equipment (DME) 171.151 Scope. This subpart sets forth minimum requirements...

2014-01-01

72

19 CFR 122.151 - Definitions.  

Code of Federal Regulations, 2013 CFR

...S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Flights to and From Cuba § 122.151 Definitions. Under this subpart, the following definitions apply: (a) United...

2013-04-01

73

49 CFR 572.151 - General description.  

Code of Federal Regulations, 2013 CFR

...SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) ANTHROPOMORPHIC TEST DEVICES CRABI 12-Month-Old Infant, Alpha Version § 572.151 General description. (a) The 12-month-old-infant crash test dummy is described by...

2013-10-01

74

33 CFR 151.17 - Surveys.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.17 Surveys. (a) Every...

2013-07-01

75

33 CFR 151.55 - Recordkeeping requirements.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Garbage Pollution and Sewage § 151.55 Recordkeeping...

2013-07-01

76

Effect of lanthanum carbonate and calcium acetate in the treatment of hyperphosphatemia in patients of chronic kidney disease  

PubMed Central

Objectives: The tolerability and efficacy of lanthanum carbonate has not been studied in the Indian population. This study was, therefore, undertaken to compare the efficacy and tolerability of lanthanum carbonate with calcium acetate in patients with stage 4 chronic kidney disease. Design: A randomized open label two group cross-over study. Materials and Methods: Following Institutional Ethics Committee approval and valid consent, patients with stage 4 chronic kidney disease were randomized to receive either lanthanum carbonate 500mg thrice daily or calcium acetate 667 mg thrice daily for 4 weeks. After a 4-week washout period, the patients were crossed over for another 4 weeks. Serum phosphorous, serum calcium, serum alkaline phosphatase, and serum creatinine were estimated at fixed intervals. Results: Twenty-six patients were enrolled in the study. The mean serum phosphorous concentrations showed a declining trend with lanthanum carbonate (from pre-drug levels of 7.88 1.52 mg/dL-7.14 1.51 mg/dL) and calcium acetate (from pre-drug levels of 7.54 1.39 mg/dL-6.51 1.38 mg/dL). A statistically significant difference was seen when comparing the change in serum calcium produced by these drugs (P < 0.05). Serum calcium levels increased with calcium acetate (from pre-drug levels of 7.01 1.07-7.46 0.74 mg dL), while it decreased with lanthanum carbonate (from pre-drug levels 7.43 0.77-7.14 0.72 mg/dL). The incidence of adverse effects was greater with lanthanum carbonate. Conclusion: Lanthanum carbonate and calcium acetate are equally effective phosphate binders with trends obvious in the first 4 weeks of therapy. The decrease in serum calcium levels with lanthanum carbonate when compared to the increase in serum calcium levels due to calcium acetate is statistically significant. The drawback of lanthanum carbonate is its high cost and relatively higher incidence of adverse events during treatment.

Scaria, P. Thomas; Gangadhar, Reneega; Pisharody, Ramdas

2009-01-01

77

[Radiographic characteristics of lanthanum carbonate absorption].  

PubMed

Lanthanum carbonate is a new nonaluminium, noncalcium phosphate binder. The drug is well-tolerated its side-effects seem comparable to those of other phosphate binders. The most frequent side-effects are gastrointestinal complications. Cerny [New England Journal of Medecine 355(2006)1160.] and Kunzendorf have recently reported another effect of lanthanum carbonate based on its radiographic characteristics. We report another case of opacification of the intestine with lanthanum carbonate which underlines some difficulties in the use of this new phosphate binder. PMID:18243834

Vrigneaud, Laurence; Lefbvre, Delphine; Daem, Alexandre Olive; Lemaitre, Vincent

2008-04-01

78

Absolute bioavailability and disposition of lanthanum in healthy human subjects administered lanthanum carbonate.  

PubMed

Lanthanum carbonate [La2(CO3)3] is a noncalcium, non-aluminum phosphate binder indicated for hyperphosphatemia treatment in end-stage renal disease. A randomized, open-label, parallel-group, phase I study was conducted to determine absolute bioavailability and investigate excretory routes for systemic lanthanum in healthy subjects. Twenty-four male subjects were randomized to a single lanthanum chloride (LaCl3) intravenous infusion (120 microg elemental lanthanum over a 4-hour period), a single 1-g oral dose [chewable La2(CO3)3 tablets; 4 x 250 mg elemental lanthanum], or no treatment (control). Serial blood, urine, and fecal samples were collected for 7 days postdosing. The absolute bioavailability of lanthanum [administered as La2(CO3)3] was extremely low (0.00127% +/- 0.00080%), with individual values in the range of 0.00015% to 0.00224%. Renal clearance was negligible following oral administration (1.36 +/- 1.43 mL/min). Intravenous administration confirmed low renal clearance (0.95 +/- 0.60 mL/min), just 1.7% of total plasma clearance. Fecal lanthanum excretion was not quantifiable after intravenous administration owing to high and variable background fecal lanthanum and constraints on the size of the intravenous dose. These findings demonstrate that lanthanum absorption from the intestinal tract into the systemic circulation is extremely low and that absorbed drug is cleared predominantly by nonrenal mechanisms. PMID:16809799

Pennick, Michael; Dennis, Kerry; Damment, Stephen J P

2006-07-01

79

Field free, directly heated lanthanum boride cathode  

DOEpatents

A directly heated cylindrical lanthanum boride cathode assembly is disclosed which minimizes generation of magnetic field which would interfere with electron emission from the cathode. The cathode assembly comprises a lanthanum boride cylinder in electrical contact at one end with a central support shaft which functions as one electrode to carry current to the lanthanum boride cylinder and in electrical contact, at its opposite end with a second electrode which is coaxially position around the central support shaft so that magnetic fields generated by heater current flowing in one direction through the central support shaft are cancelled by an opposite magnetic field generated by current flowing through the lanthanum boride cylinder and the coaxial electrode in a direction opposite to the current flow in the central shaft.

Leung, Ka-Ngo; Moussa, D.; Wilde, S.B.

1987-02-02

80

Stabilized lanthanum sulphur compounds. [thermoelectric materials  

NASA Technical Reports Server (NTRS)

Lanthanum sulfide is maintained in the stable cubic phase form over a temperature range of from 500 C to 1500 C by adding to it small amounts of calcium, barium, or strontium. This compound is an excellent thermoelectric material.

Reynolds, G. H.; Elsner, N. B.; Shearer, C. H. (inventors)

1983-01-01

81

Field free, directly heated lanthanum boride cathode  

DOEpatents

A directly heated cylindrical lanthanum boride cathode assembly is disclosed which minimizes generation of magnetic fields which would interfere with electron emission from the cathode. The cathode assembly comprises a lanthanum boride cylinder in electrical contact at one end with a central support shaft which functions as one electrode to carry current to the lanthanum boride cylinder and in electrical contact, at its opposite end with a second electrode which is coaxially position around the central support shaft so that magnetic fields generated by heater current flowing in one direction through the central support shaft are cancelled by an opposite magnetic field generated by current flowing through the lanthanum boride cylinder and the coaxial electrode in a direction opposite to the current flow in the central shaft.

Leung, Ka-Ngo (Hercules, CA); Moussa, David (San Francisco, CA); Wilde, Stephen B. (Pleasant Hill, CA)

1991-01-01

82

Lead Telluride Alloyed with Indium and Lanthanum.  

National Technical Information Service (NTIS)

Data are presented and discussed on the behavior of lead telluride alloyed with indium and with lanthanum. The data include Hall coefficient, conductance, thermal emf, Hall mobility, microhardness and bending strength. The possibility is demonstrated of d...

V. V. Gorbachev V. A. Linsky E. F. Makarov E. A. Zhemchuzhina A. I. Ivanov

1974-01-01

83

Thermodynamic representation of nonstoichiometric lanthanum manganite  

Microsoft Academic Search

The thermodynamic properties of the lanthanum manganites, La1 ? xMn1 ? y,O3 ? z, have been reevaluated within the ideal association model to simultaneously account for excess oxygen and lanthanum nonstoichiometry of LaMnO3 + ?, La0.95MnO3 + ? and La0.9MnO3 + ?. It has been found that a new set of parameters can reproduce the essential features of the thermogravimetric

Harumi Yokokawa; Teruhisa Horita; Natsuko Sakai; Masayuki Dokiya; Tatsuya Kawada

1996-01-01

84

Cost Reduction of Lanthanum Chromite Materials  

Microsoft Academic Search

Acceptor doped lanthanum chromite (LaCrO3) has long been the interconnect material of choice for high temperature SOFCs, typically operating at 1000?C. However, lanthanum chromite is relatively expensive, and many developers are currently pursuing SOFCs operating at lower temperatures. As the operating temperature is lowered, metal interconnects (e.g., ferritic steels or chromium alloys) become increasingly viable, but they have their own

Steve P. Simner; Jeffry W. Stevenson; John S. Hardy; Lawrence A. Chick

2000-01-01

85

Cost Reduction of Lanthanum Chromite Materials  

Microsoft Academic Search

Acceptor doped lanthanum chromite (LaCrO3) has long been the interconnect material of choice for high temperature SOFCs, typically operating at 1000?C, and in fact it is also viable at 800?C, since its conductivity is still 90% of that at 1000?C. However, lanthanum chromite is relatively expensive to prepare and fabricate. As the SOFC operating temperature is lowered, metal interconnects (e.g.,

Steve P. Simner; Jeffry W. Stevenson; John S. Hardy; Lawrence A. Chick

2000-01-01

86

Compact lanthanum hexaboride hollow cathode  

NASA Astrophysics Data System (ADS)

A compact lanthanum hexaboride hollow cathode has been developed for space applications where size and mass are important and research and industrial applications where access for implementation might be limited. The cathode design features a refractory metal cathode tube that is easily manufactured, mechanically captured orifice and end plates to eliminate expensive e-beam welding, graphite sleeves to provide a diffusion boundary to protect the LaB6 insert from chemical reactions with the refractory metal tube, and several heater designs to provide long life. The compact LaB6 hollow cathode assembly including emitter, support tube, heater, and keeper electrode is less than 2 cm in diameter and has been fabricated in lengths of 6-15 cm for different applications. The cathode has been operated continuously at discharge currents of 5-60 A in xenon. Slightly larger diameter versions of this design have operated at up to 100 A of discharge current.

Goebel, Dan M.; Watkins, Ronald M.

2010-08-01

87

Compact lanthanum hexaboride hollow cathode.  

PubMed

A compact lanthanum hexaboride hollow cathode has been developed for space applications where size and mass are important and research and industrial applications where access for implementation might be limited. The cathode design features a refractory metal cathode tube that is easily manufactured, mechanically captured orifice and end plates to eliminate expensive e-beam welding, graphite sleeves to provide a diffusion boundary to protect the LaB6 insert from chemical reactions with the refractory metal tube, and several heater designs to provide long life. The compact LaB(6) hollow cathode assembly including emitter, support tube, heater, and keeper electrode is less than 2 cm in diameter and has been fabricated in lengths of 6-15 cm for different applications. The cathode has been operated continuously at discharge currents of 5-60 A in xenon. Slightly larger diameter versions of this design have operated at up to 100 A of discharge current. PMID:20815605

Goebel, Dan M; Watkins, Ronald M

2010-08-01

88

The Tetraspanin CD151 in Papillomavirus Infection  

PubMed Central

Human papillomaviruses (HPV) are non-enveloped DNA tumor viruses that infect skin and mucosa. The most oncogenic subtype, HPV16, causes various types of cancer, including cervical, anal, and head and neck cancers. During the multistep process of infection, numerous host proteins are required for the delivery of virus genetic information into the nucleus of target cells. Over the last two decades, many host-cell proteins such as heparan sulfate proteoglycans, integrins, growth factor receptors, actin and the tetraspanin CD151 have been described to be involved in the process of infectious entry of HPV16. Tetraspanins have the ability to organize membrane microdomains and to directly influence the function of associated molecules, including binding of receptors to their ligands, receptor oligomerization and signal transduction. Here, we summarize the current knowledge on CD151, and CD151-associated partners during HPV infection and discuss the underlying mechanisms.

Scheffer, Konstanze D.; Berditchevski, Fedor; Florin, Luise

2014-01-01

89

Synthesis of lanthanum chromite with additions of lithium oxide  

SciTech Connect

Chromites of the rare-earth elements (in particular, lanthanum chromite LaCrO/sub 3/) are used for the preparation of chemically stable refractory objects. The method of production of lanthanum chromite by the introduction of lithium oxide into a stoiciometric mixture of chromium and lanthanum oxides has been proposed by some of the authors of this work. The present work is devoted to a study of the influence of additions of lithium oxide on the synthesis of lanthanum chromite.

Spitsyn, V.I.; Pitov, V.A.; Kolesnikova, A.K.; Kuznetsov, D.G.; Suponitskii, Yu.L.; Spiridonov, F.M.

1981-01-01

90

46 CFR 151.45-9 - Signals.  

Code of Federal Regulations, 2013 CFR

...HAZARDOUS MATERIAL CARGOES Operations § 151.45-9 Signals. While fast to a dock, a vessel during transfer of bulk cargo shall display a red flag by day or a red light by night, which signal shall be so placed that it will be visible on...

2013-10-01

91

19 CFR 151.65 - Duties.  

Code of Federal Regulations, 2013 CFR

...SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.65 Duties. Duties on wool or hair subject to duty at a rate per clean...Estimated and liquidated duties on wool or hair tested for clean yield pursuant to...

2013-04-01

92

19 CFR 151.61 - Definitions.  

Code of Federal Regulations, 2013 CFR

...AND TESTING OF MERCHANDISE Wool and Hair § 151.61 Definitions. The following...merchandise which consists exclusively of wool or hair free of all vegetable and other foreign...percent of material removable from the wool or hair by extraction with alcohol,...

2013-04-01

93

33 CFR 151.01 - Purpose.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID...the Antarctic Treaty as it Pertains to Pollution from Ships General § 151.01 Purpose...subpart is to implement the Act to Prevent Pollution from Ships, 1980, as amended...

2013-07-01

94

Thermodynamic characterization of lanthanum tellurate  

NASA Astrophysics Data System (ADS)

The standard Gibbs energy of formation of lanthanum tellurate, La 2TeO 6 was derived from its vapour pressure measurements in the temperature range 1420-1520 K employing TG based transpiration method. The temperature dependence of vapour pressure of TeO 2 vapour over the mixture La 2TeO 6 (s) + La 2O 3 (s) generated by the incongruent vapourisation reaction, LaTeO (s)?Lao (s)+TeO (g)+1/2O (g) could be represented as: log p (Pa) = [18.47-27127/ T (K)] 0.03 (1420-1520 K). Enthalpy increments on La 2TeO 6 were determined by using inverse drop calorimetry in the temperature range 583-1287 K and the thermodynamic functions, namely, heat capacity, entropy and Gibbs energy functions were derived. The mean value of -2381.3 2.0 kJ mol -1 was obtained for ? fH298? (La 2TeO 6) by combining the value of ? fG? (La 2TeO 6) derived from vapour pressure data and the free energy functions of La 2TeO 6 derived from the drop calorimetry data.

Pankajavalli, R.; Jain, Ashish; Babu, R.; Ananthasivan, K.; Anthonysamy, S.; Ganesan, V.

2010-02-01

95

Dimensional instability of doped lanthanum chromite  

SciTech Connect

Lattice expansion phase stability, and dimensional stability of doped lanthanum chromites have been examined over a wide range of temperatures and oxygen partial pressures. Reduction of doped lanthanum chromite resulted in a linear expansion of the sample that was dependent on the acceptor (Sr, Ca) concentration, temperature, oxygen partial pressure, and oxygen content within the sample. Additional doping with aliovalent B-site additives significantly reduced lattice expansion in reducing environments. The lattice expansion in reducing environments was directly related to the loss of lattice oxygen and the simultaneous reduction of Cr{sup 4+} to Cr{sup 3+} to maintain electroneutrality.

Armstrong, T.R.; Stevenson, J.W.; Pederson, L.R.; Raney, P.E. [Pacific Northwest National Lab., Richland, WA (United States). Materials Sciences Dept.

1996-09-01

96

27 CFR 25.151 - Rate of tax.  

Code of Federal Regulations, 2013 CFR

27 Alcohol, Tobacco Products and Firearms 1 2013-04-01...Section 25.151 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO...TREASURY ALCOHOL BEER Tax on Beer Liability for Tax § 25.151 Rate of...

2013-04-01

97

14 CFR 151.111 - Advance planning proposals: General.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Advance planning proposals: General. 151.111 Section...AIRPORTS Rules and Procedures for Advance Planning and Engineering Proposals 151.111 Advance planning proposals: General. (a) Each...

2010-01-01

98

14 CFR 151.119 - Advance planning proposals: Procedures; funding.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Advance planning proposals: Procedures; funding. 151...AIRPORTS Rules and Procedures for Advance Planning and Engineering Proposals 151.119 Advance planning proposals: Procedures; funding....

2010-01-01

99

14 CFR 151.113 - Advance planning proposals: Sponsor eligibility.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Advance planning proposals: Sponsor eligibility. 151...AIRPORTS Rules and Procedures for Advance Planning and Engineering Proposals 151.113 Advance planning proposals: Sponsor eligibility....

2010-01-01

100

33 CFR 151.1510 - Ballast water management requirements.  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Ballast water management requirements. 151.1510 Section 151.1510 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2013-07-01

101

33 CFR 151.1511 - Ballast water discharge standard (BWDS).  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Ballast water discharge standard (BWDS). 151.1511 Section 151.1511 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2013-07-01

102

33 CFR 151.2030 - Ballast water discharge standard (BWDS).  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Ballast water discharge standard (BWDS). 151.2030 Section 151.2030 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2013-07-01

103

33 CFR 151.2025 - Ballast water management requirements.  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Ballast water management requirements. 151.2025 Section 151.2025 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2013-07-01

104

46 CFR 151.40-11 - Refrigeration systems.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Refrigeration systems. 151.40-11 Section...Control Installations 151.40-11 Refrigeration systems. (a) Boiloff systems... (b) Vapor compression, tank refrigeration, and secondary refrigeration...

2011-10-01

105

33 CFR 151.2030 - Ballast water discharge standard (BWDS).  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Ballast water discharge standard (BWDS). 151.2030 Section 151.2030 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2012-07-01

106

33 CFR 151.2025 - Ballast water management requirements.  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Ballast water management requirements. 151.2025 Section 151.2025 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2012-07-01

107

33 CFR 151.1511 - Ballast water discharge standard (BWDS).  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Ballast water discharge standard (BWDS). 151.1511 Section 151.1511 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2012-07-01

108

33 CFR 151.1510 - Ballast water management.  

Code of Federal Regulations, 2011 CFR

33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Ballast water management. 151.1510 Section 151.1510 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)...

2011-07-01

109

33 CFR 151.1510 - Ballast water management requirements.  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Ballast water management requirements. 151.1510 Section 151.1510 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2012-07-01

110

46 CFR 151.40-11 - Refrigeration systems.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Refrigeration systems. 151.40-11 Section...Control Installations § 151.40-11 Refrigeration systems. (a) Boiloff systems... (b) Vapor compression, tank refrigeration, and secondary refrigeration...

2010-10-01

111

46 CFR 151.40-11 - Refrigeration systems.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 2009-10-01 false Refrigeration systems. 151.40-11 Section...Control Installations § 151.40-11 Refrigeration systems. (a) Boiloff systems... (b) Vapor compression, tank refrigeration, and secondary refrigeration...

2009-10-01

112

17 CFR 151.9 - Pre-existing positions.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Pre-existing positions. 151.9 Section 151.9 Commodity...COMMODITY FUTURES TRADING COMMISSION POSITION LIMITS FOR FUTURES AND SWAPS § 151.9 Pre-existing positions. (a) Non-spot-month...

2013-04-01

113

46 CFR 151.50-75 - Ferric chloride solution.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Ferric chloride solution. 151.50-75 Section 151.50-75...Requirements § 151.50-75 Ferric chloride solution. A containment system (cargo tank...system, and gauging system) carrying this solution must be lined with rubber,...

2013-10-01

114

46 CFR 151.45-8 - Illness, alcohol, drugs.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Illness, alcohol, drugs. 151.45-8 Section 151.45-8 Shipping...MATERIAL CARGOES Operations § 151.45-8 Illness, alcohol, drugs. A person who is under the influence of liquor...

2013-10-01

115

9 CFR 151.11 - Form of books of record.  

Code of Federal Regulations, 2010 CFR

...2009-01-01 2009-01-01 false Form of books of record. 151.11 Section 151.11...ANIMAL BREEDS RECOGNITION OF BREEDS AND BOOKS OF RECORD OF PUREBRED ANIMALS Recognition of Breeds and Books of Record § 151.11 Form of books...

2009-01-01

116

46 CFR 151.03-49 - Sounding tube.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Sounding tube. 151.03-49 Section 151.03-49 Shipping...CARGOES Definitions § 151.03-49 Sounding tube. This is an unperforated tube fitted to an ullage hole, secured so as to be...

2013-10-01

117

46 CFR 151.50-10 - Alkylene oxides.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 2009-10-01 false Alkylene oxides. 151.50-10 Section 151.50-10...Requirements § 151.50-10 Alkylene oxides. (a) For the purpose of this part, alkylene oxides are considered to be ethylene oxide...

2009-10-01

118

46 CFR 151.50-21 - Sulfuric acid.  

Code of Federal Regulations, 2010 CFR

...5 2010-10-01 2010-10-01 false Sulfuric acid. 151.50-21 Section 151.50-21 Shipping...CARGOES Special Requirements § 151.50-21 Sulfuric acid. (a) How sulfuric acid may be carried. (1) Sulfuric acid...

2010-10-01

119

46 CFR 151.50-21 - Sulfuric acid.  

Code of Federal Regulations, 2010 CFR

...5 2009-10-01 2009-10-01 false Sulfuric acid. 151.50-21 Section 151.50-21 Shipping...CARGOES Special Requirements § 151.50-21 Sulfuric acid. (a) How sulfuric acid may be carried. (1) Sulfuric acid...

2009-10-01

120

42 CFR 84.151 - Harness test; minimum requirements.  

Code of Federal Regulations, 2012 CFR

...Health 1 2012-10-01 2012-10-01 false Harness test; minimum requirements. 84.151 Section 84.151 Public...PROTECTIVE DEVICES Supplied-Air Respirators § 84.151 Harness test; minimum requirements. (a)(1) Shoulder straps...

2012-10-01

121

46 CFR 151.50-13 - Propylene oxide.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 2009-10-01 false Propylene oxide. 151.50-13 Section 151...Special Requirements § 151.50-13 Propylene oxide. (a)(1) Pressure vessel...5/16 -inch thick. (b) When propylene oxide is carried on board a...

2009-10-01

122

46 CFR 151.50-13 - Propylene oxide.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Propylene oxide. 151.50-13 Section 151...Special Requirements § 151.50-13 Propylene oxide. (a)(1) Pressure vessel...5/16 -inch thick. (b) When propylene oxide is carried on board a...

2010-10-01

123

Discovery of the 151Eu ? decay  

NASA Astrophysics Data System (ADS)

We report on the first compelling observation of ? decay of 151Eu to the ground state of 147Pm. The measurement was performed using a 6.15 g Li6Eu(BO3)3 crystal operated as a scintillating bolometer. The Q-value and half-life measured are: Q = 1948.96.9(stat.) 5.1(syst.) keV, and T1/2 = (4.62 0.95(stat.) 0.68(syst.)) 1018 y. The half-life prediction of nuclear theory using the Coulomb and proximity potential model are in good agreement with this experimental result.

Casali, N.; Nagorny, S. S.; Orio, F.; Pattavina, L.; Beeman, J. W.; Bellini, F.; Cardani, L.; Dafinei, I.; Di Domizio, S.; Di Vacri, M. L.; Gironi, L.; Kosmyna, M. B.; Nazarenko, B. P.; Nisi, S.; Pessina, G.; Piperno, G.; Pirro, S.; Rusconi, C.; Shekhovtsov, A. N.; Tomei, C.; Vignati, M.

2014-07-01

124

33 CFR Appendix A to 151.51... - Summary of Garbage Discharge Restrictions  

Code of Federal Regulations, 2012 CFR

...CFR 151.71) Fixed or floatingplatforms & assoc. vessels 3 (33 CFR 151.73) Plasticsincludes synthetic ropes and fishing nets and plastic bags Disposal prohibited (33 CFR 151.67) Disposal prohibited (33 CFR 151.67)...

2012-07-01

125

Inelastic Collisions of Slow Electrons with Lanthanum Trichloride Molecules  

Microsoft Academic Search

Inelastic collisions of electrons with lanthanum trichloride molecules were studied by the extended crossed-beam technique. About 90 excitation cross sections for spectral lines of the singly charged lanthanum ion were measured at an incident electron energy of 100 eV. Neither lanthanum atomic lines nor spectral bands due to LaCl molecule were detected. Plausible reactions of dissociative excitation of LaII are

Yu. M. Smirnov

2001-01-01

126

14 CFR Appendix I to Part 151 - Appendix I to Part 151  

Code of Federal Regulations, 2010 CFR

...incorporated by § 151.72: (a) Circulars available free of charge. ] Number Subject AC 150/5300-3 Adaptation of TSO-N18 Criterion to Clearways and Stopways. AC 150/5325-2A Airport Surface Areas Gradient Standards. AC...

2009-01-01

127

Cost Reduction of Lanthanum Chromite Materials  

SciTech Connect

Acceptor doped lanthanum chromite (LaCrO3) has long been the interconnect material of choice for high temperature SOFCs, typically operating at 1000?C. However, lanthanum chromite is relatively expensive, and many developers are currently pursuing SOFCs operating at lower temperatures. As the operating temperature is lowered, metal interconnects (e.g., ferritic steels or chromium alloys) become increasingly viable, but they have their own unique problems (including Cr-oxide formation and Cr volatilization), and it is therefore likely that uncoated metals cannot be used at temperatures greater than 700?C. For intermediate operating temperatures (700-800?C), the application of protective oxide coatings may allow the use of metal interconnects (if such coatings can be applied cost-effectively), but lanthanum chromite may offer better long-term performance. While the electrical conductivity of lanthanum chromite does decrease as temperature decreases, the conductivity at 800?C is only about 10% less than the conductivity at 1000?C. In this study, the authors have investigated the viability of replacing pure La in the acceptor doped LaCrO3 with a less expensive mixed lanthanide (Ln) precursor containing La3+ as the principle cation, but also Ce4+, Nd3+ and Pr3+ in significant proportions. Typical compositions investigated were of the formula Ln0.85Sr0.15Cr1-yMyO3, where 0.02?y?0.1 and M= Co, Cu, Ni, and V. Samples were studied with respect to sinterability in air, thermal expansion, conductivity in air and at low pO2, phase stability, and dilation under reducing atmospheres.

Simner, Steve P. (BATTELLE (PACIFIC NW LAB)); Stevenson, Jeffry W. (BATTELLE (PACIFIC NW LAB)); Hardy, John S. (BATTELLE (PACIFIC NW LAB)); Chick, Lawrence A. (BATTELLE (PACIFIC NW LAB))

2000-01-01

128

Sintering of lanthanum chromite using strontium vanadate  

Microsoft Academic Search

Small proportions (5 and 10 wt.%) of strontium vanadate (Sr3(VO4)2) were added to strontium-doped lanthanum chromite (La0.85Sr0.15CrO3) to produce high density fuel cell interconnect materials in air at 1550C without adversely affecting the desirable properties of the material. Compositions investigated were shown to have good electrical conductivity at SOFC operating temperatures in air and reducing environments, phase stability from room

S. P Simner; J. S Hardy; J. W Stevenson; T. R Armstrong

2000-01-01

129

Tetraspanin CD151 Mediates Papillomavirus Type 16 Endocytosis  

PubMed Central

Human papillomavirus type 16 (HPV16) is the primary etiologic agent for cervical cancer. The infectious entry of HPV16 into cells occurs via a so-far poorly characterized clathrin- and caveolin-independent endocytic pathway, which involves tetraspanin proteins and actin. In this study, we investigated the specific role of the tetraspanin CD151 in the early steps of HPV16 infection. We show that surface-bound HPV16 moves together with CD151 within the plane of the membrane before they cointernalize into endosomes. Depletion of endogenous CD151 did not affect binding of viral particles to cells but resulted in reduction of HPV16 endocytosis. HPV16 uptake is dependent on the C-terminal cytoplasmic region of CD151 but does not require its tyrosine-based sorting motif. Reexpression of the wild-type CD151 but not mutants affecting integrin functions restored virus internalization in CD151-depleted cells. Accordingly, short interfering RNA (siRNA) gene knockdown experiments confirmed that CD151-associated integrins (i.e., ?3?1 and ?6?1/4) are involved in HPV16 infection. Furthermore, palmitoylation-deficient CD151 did not support HPV16 cell entry. These data show that complex formation of CD151 with laminin-binding integrins and integration of the complex into tetraspanin-enriched microdomains are critical for HPV16 endocytosis.

Scheffer, Konstanze D.; Gawlitza, Alexander; Spoden, Gilles A.; Zhang, Xin A.; Lambert, Carsten

2013-01-01

130

Stability of lanthanum calcium chromite-lanthanum strontium manganite interfaces in solid oxide fuel cells  

SciTech Connect

An investigation has been made on the chemical stability of the cathode-interconnect interface in solid oxide fuel cells. Lanthanum calcium chromite and lanthanum strontium manganite (a dense 10% A-site deficient manganite, a porous 10% A-site deficient one or a dense 1% A-site deficient one) were placed between air and fuel (hydrogen/water) at a selected electrical current density. The electrical conductivity across the interfaces was slightly increased for 300 h. Changes in morphology, chemical composition, and phases were examined by scanning electron microscopy/energy dispersive X-ray and X-ray diffractometry analysis. The dense 10% A-site deficient cathode gave rise to the precipitation of manganese oxide at the air-side surface as well as at the interface. The porous cathode enhanced chemical reactions between lanthanum calcium chromite and lanthanum strontium manganite. The dense 1% A-site deficient cathode was most stable. These phenomena have been thermodynamically analyzed in terms of (1) irreversible mass transfer under an oxygen potential gradient, (2) changes of the stable composition region of the perovskite phases as a function of oxygen potential, and (3) an enhancing effect of the liquid formation on reactions of interfaces.

Nishiyama, H.; Aizawa, M. [TOTO, Ltd., Chigasaki, Kanagawa (Japan). Research and Development Div.; Yokokawa, H.; Horita, T.; Sakai, N.; Dokiya, M. [National Inst. of Materials and Chemical Research, Tsukuba, Ibaraki (Japan); Kawada, T. [Tohoku Univ., Sendai, Miyagi (Japan). Research Inst. for Scientific Measurements

1996-07-01

131

33 CFR 151.77 - Exceptions for emergencies.  

Code of Federal Regulations, 2010 CFR

...mesh size no larger than 25 mm. (1 inch) (33 CFR 151.75) Note 2: Special areas under Annex V are the Mediterranean, Baltic, Black, Red, and North Seas areas and the Gulfs area. (33 CFR 151.53) Note 3: Fixed or floating platforms...

2010-07-01

132

46 CFR 151.03-33 - Lakes, bays, and sounds.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Lakes, bays, and sounds. 151.03-33...CARGOES Definitions § 151.03-33 Lakes, bays, and sounds. A designation...vessels navigating the waters of any of the lakes, bays, or sounds other than the...

2013-10-01

133

46 CFR 151.50-50 - Elemental phosphorus in water.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false Elemental phosphorus in water. 151.50-50 Section...Requirements § 151.50-50 Elemental phosphorus in water. (a) Tanks shall be...head equivalent to the design lading of phosphorus and its water blanket...

2010-10-01

134

46 CFR 151.50-50 - Elemental phosphorus in water.  

Code of Federal Regulations, 2010 CFR

... 2009-10-01 false Elemental phosphorus in water. 151.50-50 Section...Requirements § 151.50-50 Elemental phosphorus in water. (a) Tanks shall be...head equivalent to the design lading of phosphorus and its water blanket...

2009-10-01

135

Estimation of Sm-151 from Measured Pm-147.  

National Technical Information Service (NTIS)

The attached procedure is a derivation to estimate Sm-151 activity in DWPF glass product and glass melter feed samples. Sm-151 is one of the radioactive fission product species in the glass product which will contribute greater than 0.05% of the total act...

R. A. Dewberry

1988-01-01

136

Half-life of {sup 151}Sm remeasured  

SciTech Connect

The half-life of {sup 151}Sm was redetermined and compared with literature values. A {sup 151}Sm{sub 2}O{sub 3} sample was produced by exposing {sup 150}Sm{sub 2}O{sub 3} to the high neutron flux of the heavy water research reactor at the China Institute of Atomic Energy (CIAE). The number of atoms and the activity of {sup 151}Sm in the sample were measured by thermal ionization mass spectrometry (TIMS) and liquid scintillation counting (LSC), respectively. The half-life of {sup 151}Sm determined in this work is 96.6 yr, with a standard uncertainty of 2.4 yr based on a quadratic summation of the uncertainty components from the measurements of the number of atoms and the activity of {sup 151}Sm.

He Ming; Shen Hongtao; Shi Guozhu; Yin Xinyi; Tian Weizhi; Jiang Shan [Department of Nuclear Physics, China Institute of Atomic Energy, Post Office Box 275-50, Beijing 102413 (China)

2009-12-15

137

Tetraspanin CD151 regulates ?6?1 integrin adhesion strengthening  

PubMed Central

The tetraspanin CD151 molecule associates specifically with laminin-binding integrins, including ?6?1. To probe strength of ?6?1-dependent adhesion to laminin-1, defined forces (01.5 nN) were applied to magnetic laminin-coated microbeads bound to NIH 3T3 cells. For NIH 3T3 cells bearing wild-type CD151, adhesion strengthening was observed, as bead detachment became more difficult over time. In contrast, mutant CD151 (with the C-terminal region replaced) showed impaired adhesion strengthening. Static cell adhesion to laminin-1, and detachment of beads coated with fibronectin or anti-?6 antibody were all unaffected by CD151 mutation. Hence, CD151 plays a key role in selectively strengthening ?6?1 integrin-mediated adhesion to laminin-1.

Lammerding, Jan; Kazarov, Alexander R.; Huang, Hayden; Lee, Richard T.; Hemler, Martin E.

2003-01-01

138

Thermal stability of lanthanum scandate dielectrics on Si(100)  

SciTech Connect

The authors have examined the thermal stability of amorphous, molecular beam deposited lanthanum scandate dielectric thin films on top of Si (100) after a 1000 deg. C, 10 s rapid thermal anneal. After the anneal, crystallization of LaScO{sub 3} is observed. Excellent suppression of lanthanum and scandium diffusion into the substrate silicon is indicated by the back-side secondary ion mass spectrometry (SIMS) analyses. In contrast, front-side SIMS and high-resolution electron energy loss analyses of the amorphous Si/LaScO{sub 3}/Si (100) stack indicated the outdiffusion of lanthanum and scandium into the silicon capping layer during the anneal.

Sivasubramani, P.; Lee, T. H.; Kim, M. J.; Kim, J.; Gnade, B. E.; Wallace, R. M.; Edge, L. F.; Schlom, D. G.; Stevie, F. A.; Garcia, R.; Zhu, Z.; Griffis, D. P. [Department of Electrical Engineering, University of Texas at Dallas, Richardson, Texas 75080 and Department of Physics, University of Texas at Dallas, Richardson, Texas 75080 (United States); Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Analytical Instrumentation Facility, North Carolina State University, Raleigh, North Carolina 27695 (United States)

2006-12-11

139

14 CFR 151.123 - Procedures: Offer; amendment; acceptance; advance planning agreement.  

Code of Federal Regulations, 2010 CFR

...Offer; amendment; acceptance; advance planning agreement. 151.123 Section 151...AIRPORTS Rules and Procedures for Advance Planning and Engineering Proposals 151.123...Offer; amendment; acceptance; advance planning agreement. (a) The procedures...

2010-01-01

140

47 CFR 87.151 - Special requirements for differential GPS receivers.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Special requirements for differential GPS receivers. 87.151 Section 87.151 Telecommunication...Requirements § 87.151 Special requirements for differential GPS receivers. (a) The receiver shall achieve a...

2010-10-01

141

47 CFR 87.151 - Special requirements for differential GPS receivers.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 false Special requirements for differential GPS receivers. 87.151 Section 87.151 Telecommunication...Requirements § 87.151 Special requirements for differential GPS receivers. (a) The receiver shall achieve a...

2009-10-01

142

47 CFR 87.151 - Special requirements for differential GPS receivers.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Special requirements for differential GPS receivers. 87.151 Section 87.151 Telecommunication...Requirements § 87.151 Special requirements for differential GPS receivers. (a) The receiver shall achieve a...

2013-10-01

143

19 CFR 151.47 - Optional entry of net quantity of petroleum or petroleum products.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Optional entry of net quantity of petroleum or petroleum products. 151.47 Section 151.47 Customs...EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Petroleum and Petroleum Products § 151.47 Optional...

2009-04-01

144

19 CFR 151.47 - Optional entry of net quantity of petroleum or petroleum products.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Optional entry of net quantity of petroleum or petroleum products. 151.47 Section 151.47 Customs...EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Petroleum and Petroleum Products § 151.47 Optional...

2010-04-01

145

33 CFR Appendix A to 151.51... - Summary of Garbage Discharge Restrictions  

Code of Federal Regulations, 2010 CFR

...CFR 151.71) Fixed or Floating Platforms & Assoc. Vessels 3 (33 CFR 151.73) Plasticsincludes synthetic ropes and fishing nets and plastic bags. Disposal prohibited(33 CFR 151.67). Disposal prohibited(33 CFR...

2010-07-01

146

33 CFR Appendix A to 151.51... - Summary of Garbage Discharge Restrictions  

Code of Federal Regulations, 2011 CFR

...CFR 151.71) Fixed or Floating Platforms & Assoc. Vessels 3 (33 CFR 151.73) Plasticsincludes synthetic ropes and fishing nets and plastic bags. Disposal prohibited(33 CFR 151.67). Disposal prohibited(33 CFR...

2011-07-01

147

9 CFR 151.10 - Recognition of additional breeds and books of record.  

Code of Federal Regulations, 2010 CFR

...false Recognition of additional breeds and books of record. 151.10 Section 151.10...ANIMAL BREEDS RECOGNITION OF BREEDS AND BOOKS OF RECORD OF PUREBRED ANIMALS Recognition of Breeds and Books of Record § 151.10 Recognition...

2010-01-01

148

32 CFR 151.5 - Reports on the exercise of foreign criminal jurisdiction.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 2013-07-01 false Reports on the exercise of foreign criminal jurisdiction. 151.5 Section 151...FORCES POLICIES AND INFORMATION § 151.5 Reports on the exercise of foreign criminal jurisdiction. The following...

2013-07-01

149

19 CFR 151.47 - Optional entry of net quantity of petroleum or petroleum products.  

Code of Federal Regulations, 2013 CFR

...net quantity of petroleum or petroleum products. 151.47 Section 151...MERCHANDISE Petroleum and Petroleum Products § 151.47 Optional entry of net quantity of petroleum or petroleum products. Instead of stating...

2013-04-01

150

Analytical and structural analysis of the lanthanum-deficient lanthanum hexaboride  

SciTech Connect

The blue lanthanum boride LaB/sub 6+delta/ previously reported as LaB/sub 9/, was investigated in arc-melted samples of LaB/sub 9/ bulk stoichiometry. The samples were structurally analyzed by high-resolution transmission electron microscopy including comparative computer imaging and analytically studied by using backscattered electron imaging, quantitative characteristic x-ray analysis, nuclear magnetic resonance, and other techniques. The blue boride observed has a composition of LaB/sub 6.13 +- 0.03/ due to random La vacancies in the LaB/sub 6/ structure and is interpreted as belonging to the nonstoichiometric LaB/sub 6/ phase region. The color change from purple to blue occurs for decreasing lanthanum content roughly at a composition LaB/sub 6/ /sub 07/. A modification of the La-B phase diagram is proposed.

McKelvy, M.J.; Eyring, L.; Storms, E.K.

1984-04-26

151

Cost Reduction of Lanthanum Chromite Materials  

SciTech Connect

Acceptor doped lanthanum chromite (LaCrO3) has long been the interconnect material of choice for high temperature SOFCs, typically operating at 1000?C, and in fact it is also viable at 800?C, since its conductivity is still 90% of that at 1000?C. However, lanthanum chromite is relatively expensive to prepare and fabricate. As the SOFC operating temperature is lowered, metal interconnects (e.g., ferritic steels or chromium alloys) become increasingly viable, but they have their own unique problems (including Cr-oxide formation and Cr volatilization), and it is therefore unlikely that bare metals can be used at temperatures greater than 700?C. For intermediate operating temperatures (700-800?C), development of cost-effective oxide coatings may allow use of metal interconnects, but the long-term performance of such coated metals remains in doubt. In the event that even coated metals prove unsatisfactory, lanthanum chromite may be the only viable choice, in which case it will be essential to continue to reduce chromite raw material and fabrication costs. In this study, the authors have investigated the practicality of replacing pure La in LaCrO3 with a less expensive mixed lanthanide (Ln) precursor, containing mainly La3+, but also significant proportions of Ce4+, Nd3+ and Pr3+. Typical compositions investigated were of the formula Ln0.85Sr0.15Cr1-yMyO3, where 0.02*y*0.1 and M= Co, Cu, Ni, and V. Samples were studied with respect to sinterability in air, thermal expansion, conductivity in air and at low pO2, phase stability, and dilation under reducing atmospheres. The most promising of the materials investigated was Ln0.85Sr0.15Cr0.95Cu0.05O3, which could be sintered to>90% theoretical density at 1250?C. This material exhibited conductivities>20 S/cm in air and>5 S/cm at pO2= 10-16 atm, and indicated no phase change from 25-1000?C. The TEC (25-1000?C) of the material, 9.4 x 10-6?C-1, was somewhat lower than that of the YSZ electrolyte (10.5x 10-6?C-1).

Simner, Steve P. (BATTELLE (PACIFIC NW LAB)); Stevenson, Jeffry W. (BATTELLE (PACIFIC NW LAB)); Hardy, John S. (BATTELLE (PACIFIC NW LAB)); Chick, Lawrence A. (BATTELLE (PACIFIC NW LAB))

2000-02-28

152

The energetics of lanthanum tantalate materials  

SciTech Connect

Lanthanum tantalates are important refractory materials with application in photocatalysis, solid oxide fuel cells, and phosphors. Soft-chemical synthesis utilizing the Lindqvist ion, [Ta{sub 6}O{sub 19}]{sup 8-}, has yielded a new phase, La{sub 2}Ta{sub 2}O{sub 7}(OH){sub 2}. Using the hydrated phase as a starting material, a new lanthanum orthotantalate polymorph was formed by heating to 850 {sup o}C, which converts to a previously reported LaTaO{sub 4} polymorph at 1200 {sup o}C. The stabilities of La{sub 2}Ta{sub 2}O{sub 7}(OH){sub 2} (LaTa-OH), the intermediate LaTaO{sub 4} polymorph (LaTa-850), and the high temperature phase (LaTa-1200) were investigated using high-temperature oxide melt solution calorimetry. The enthalpy of formation from the oxides were calculated from the enthalpies of drop solution to be -87.1{+-}9.6, -94.9{+-}8.8, and -93.1{+-}8.7 kJ/mol for LaTa-OH, LaTa-850, and LaTa-1200, respectively. These results indicate that the intermediate phase, LaTa-850, is the most stable. This pattern of energetics may be related to cation-cation repulsion of the tantalate cations. We also investigated possible LnTaO{sub 4} and Ln{sub 2}Ta{sub 2}O{sub 7}(OH){sub 2} analogues of Ln=Pr, Nd to examine the relationship between cation size and the resulting phases. - Graphical abstract: The energetics of three lanthanum tantalates were investigated by the high-temperature oxide melt solution calorimetry. The enthalpies of formation from the oxides were calculated from the enthalpies of drop solution to be -87.1{+-}9.6, -94.9{+-}8.8, and -93.1{+-}8.7 kJ/mol for La{sub 2}Ta{sub 2}O{sub 7}(OH){sub 2}, LaTaO{sub 4} (850 {sup o}C), and LaTaO{sub 4} (1200 {sup o}C), respectively. These results indicate that the intermediate phase, LaTaO{sub 4} (850 {sup o}C), is the most stable in energy. Display Omitted

Forbes, Tori Z., E-mail: tmforbes@ucdavis.ed [Peter A. Rock Thermochemistry Laboratory and NEAT ORU, University of California at Davis, Davis, CA 95616 (United States); Nyman, May, E-mail: mdnyman@sandia.go [Sandia National Laboratory, POB 5800, Albuquerque, NM 87185 (United States); Rodriguez, Mark A., E-mail: marodri@sandia.go [Sandia National Laboratory, POB 5800, Albuquerque, NM 87185 (United States); Navrotsky, Alexandra, E-mail: anavrotsky@ucdavis.ed [Peter A. Rock Thermochemistry Laboratory and NEAT ORU, University of California at Davis, Davis, CA 95616 (United States)

2010-11-15

153

9 CFR 151.11 - Form of books of record.  

Code of Federal Regulations, 2010 CFR

...ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE ANIMAL BREEDS RECOGNITION OF BREEDS AND BOOKS OF RECORD OF PUREBRED ANIMALS Recognition of Breeds and Books of Record § 151.11 Form of books of record....

2010-01-01

154

151. Historic American Buildings Survey, Donald W. Dickensheets, Photographer. March ...  

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

151. Historic American Buildings Survey, Donald W. Dickensheets, Photographer. March 28, 1940. PENDENTIVE MURAL - CHOIR LOFT - 'ST. JOHN WITH EAGLE'. (SOUTHEAST ELEVATION) - San Xavier del Bac Mission, Mission Road, Tucson, Pima County, AZ

155

14 CFR 151.117 - Advance planning proposals: Procedures; application.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Advance planning proposals: Procedures; application...AIRPORTS Rules and Procedures for Advance Planning and Engineering Proposals 151.117 Advance planning proposals: Procedures;...

2010-01-01

156

34 CFR 300.151 - Adoption of State complaint procedures.  

Code of Federal Regulations, 2013 CFR

...CHILDREN WITH DISABILITIES State Eligibility State Complaint Procedures § 300.151 Adoption of State complaint procedures. (a) General. Each SEA must adopt written procedures for (1) Resolving any complaint, including a...

2013-07-01

157

33 CFR 151.1508 - Revocation of clearance.  

Code of Federal Regulations, 2013 CFR

...COMMERCIAL WASTE, AND BALLAST WATER Ballast Water Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1508 Revocation of clearance. A COTP may request the District Director of Customs to withhold or...

2013-07-01

158

33 CFR 151.1513 - Extension of compliance date.  

Code of Federal Regulations, 2013 CFR

...COMMERCIAL WASTE, AND BALLAST WATER Ballast Water Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1513 Extension of compliance date. The Coast Guard may grant an extension to the...

2013-07-01

159

33 CFR 151.2000 - Purpose and scope.  

Code of Federal Regulations, 2013 CFR

...WATER Ballast Water Management for Control of Nonindigenous Species in Waters of the United States § 151.2000 Purpose and...16 U.S.C. 4701-4751), as amended by the National Invasive Species Act of...

2013-07-01

160

46 CFR 151.58-1 - Required materials.  

Code of Federal Regulations, 2013 CFR

... (a) Aluminum, stainless steel, or steel covered with a protective lining or coating. (See § 151.15-3(f... (e) Stainless steel or steel covered with a suitable protective lining or coating. (See §...

2013-10-01

161

19 CFR 151.45 - Storage tanks bonded as warehouses.  

Code of Federal Regulations, 2013 CFR

...MERCHANDISE Petroleum and Petroleum Products § 151.45 Storage tanks...storage of imported petroleum or petroleum products in bulk may be bonded as warehouses...the storage of petroleum or petroleum products belonging or consigned...

2013-04-01

162

26 CFR 1.151-1 - Deductions for personal exemptions.  

Code of Federal Regulations, 2010 CFR

...CONTINUED) Deductions for Personal Exemptions § 1.151-1 Deductions for personal exemptions. (a) In general. (1) In computing taxable income, an individual...and spouse (the so-called personal exemptions);...

2009-04-01

163

26 CFR 1.151-1 - Deductions for personal exemptions.  

Code of Federal Regulations, 2010 CFR

...CONTINUED) Deductions for Personal Exemptions § 1.151-1 Deductions for personal exemptions. (a) In general. (1) In computing taxable income, an individual...and spouse (the so-called personal exemptions);...

2010-04-01

164

151. Linville Falls Recreation Area. Detail of the diamond shaped ...  

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

151. Linville Falls Recreation Area. Detail of the diamond shaped cutwaters of the Linville River Bridge. Looking south. - Blue Ridge Parkway, Between Shenandoah National Park & Great Smoky Mountains, Asheville, Buncombe County, NC

165

29 CFR 1910.151 - Medical services and first aid.  

Code of Federal Regulations, 2013 CFR

...OCCUPATIONAL SAFETY AND HEALTH STANDARDS Medical and First Aid § 1910.151 Medical services and first aid. ...ensure the ready availability of medical personnel for advice and consultation on matters of plant health. (b) In the...

2013-07-01

166

29 CFR 1910.151 - Medical services and first aid.  

Code of Federal Regulations, 2010 CFR

...OCCUPATIONAL SAFETY AND HEALTH STANDARDS Medical and First Aid § 1910.151 Medical services and first aid. ...ensure the ready availability of medical personnel for advice and consultation on matters of plant health. (b) In the...

2009-07-01

167

29 CFR 1910.151 - Medical services and first aid.  

Code of Federal Regulations, 2010 CFR

...OCCUPATIONAL SAFETY AND HEALTH STANDARDS Medical and First Aid § 1910.151 Medical services and first aid. ...ensure the ready availability of medical personnel for advice and consultation on matters of plant health. (b) In the...

2010-07-01

168

19 CFR 151.66 - Duty on samples.  

Code of Federal Regulations, 2013 CFR

...OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.66 Duty on samples. Duty shall be assessed and collected on samples taken pursuant to any provision in this...

2013-04-01

169

19 CFR 151.76 - Grading of wool.  

Code of Federal Regulations, 2013 CFR

...OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.76 Grading of wool. (a) Examination for grade. The port director shall cause wool dutiable at a...

2013-04-01

170

33 CFR 151.27 - Plan submission and approval.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.27 Plan submission and...

2013-07-01

171

33 CFR 151.10 - Control of oil discharges.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.10 Control of oil...

2013-07-01

172

33 CFR 151.25 - Oil Record Book.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.25 Oil Record Book....

2013-07-01

173

33 CFR 151.26 - Shipboard oil pollution emergency plans.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Shipboard oil pollution emergency plans. 151.26 Section...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID...the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution §...

2010-07-01

174

33 CFR 151.26 - Shipboard oil pollution emergency plans.  

Code of Federal Regulations, 2010 CFR

...2009-07-01 false Shipboard oil pollution emergency plans. 151.26 Section...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID...the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution §...

2009-07-01

175

33 CFR 151.28 - Plan review and revision.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.28 Plan review and revision....

2013-07-01

176

33 CFR 151.23 - Inspection for compliance and enforcement.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.23 Inspection for compliance...

2013-07-01

177

CD151 promotes proliferation and migration of PC3 cells via the formation of CD151-integrin ?3/?6 complex.  

PubMed

Over-expression of CD151 was found to be associated with metastasis and poor prognosis of prostatic carcinoma. This study was designed to examine the mechanism by which CD151 promotes the proliferation and migration of prostatic cancer cells. The pAAV-CD151, pAAV-GFP and pAAV-CD151-AAA mutant plasmids were constructed and used to transiently transfect PC3 cells (a prostatic carcinoma 3 cell line) by the mediation of Fugene HD. Then, the cells were assigned to control group, pAAV-GFP group, pAAV-CD151 group, and pAAV-CD151-AAA group respectively. Cell proliferation was evaluated by using the 3-[4,5-dimet-hylthiazol-2-yl]-2,5, diphenyltetrazolium bromide (MTT) method. Cell migration assay was performed by using Boyden chambers. The formation of CD151-integrin ?3/?6 complex was determined by the method of co-immunoprecipitation. The protein expression levels of CD151 and extracellular signal-regulated kinase (ERK) were measured by Western blotting. The results showed that transfection of pAAV-CD151 or pAAV-CD151-AAA mutant increased the expression of CD151 protein in PC3 cells. Co-immunoprecipitation showed that more CD151-integrin ?3/?6 complex was formed in the pAAV-CD151 group than in the control group, the pAAV-GFP group and the pAAV-CD151-AAA mutant group. Furthermore, the proliferative and migrating capacity of PC3 cells was substantially increased in the pAAV-CD151 group but inhibited in the pAAV-CD151-AAA mutant group. CD151 transfection increased the expression of phospho-ERK. Taken together, it was concluded that CD151 promotes the proliferation and migration of PC3 cells through the formation of CD151-integrin complex and the activation of phosphorylated ERK. PMID:22684562

Yang, Wuxiao; Li, Pengcheng; Lin, Jingyang; Zuo, Houjuan; Zuo, Ping; Zou, Yuanlin; Liu, Zhengxiang

2012-06-01

178

Clinical pharmacokinetics of the phosphate binder lanthanum carbonate.  

PubMed

Lanthanum carbonate is considered to be the most potent of a new generation of noncalcium phosphate binders used to treat hyperphosphataemia in chronic kidney disease (CKD), a condition associated with progressive bone and cardiovascular pathology and a markedly elevated risk of death. Its phosphate-binding action involves ionic binding and precipitation of insoluble complexes within the lumen of the intestine, thereby preventing absorption of dietary phosphate. While pharmacokinetics have little relevance to the efficacy of lanthanum carbonate, they are of fundamental importance when it comes to evaluating safety. When administered as lanthanum carbonate, the oral bioavailability of lanthanum is low (approximately 0.001%). The small absorbed fraction is excreted predominantly in bile, with less than 2% being eliminated by the kidneys. Predictably, therefore, plasma exposure and pharmacokinetics have been shown to be similar in healthy human volunteers and CKD stage 5 patients. With almost complete plasma protein binding, free lanthanum concentrations in patients at steady state are <3 pg/mL. These properties greatly reduce systemic exposure, tissue deposition and the potential for adverse effects. While lanthanum has a variety of calcium-like actions in vitro, there is little or no evidence that these occur in vivo. This paradox is explained by the very low concentrations of circulating free lanthanum ions, which are many orders of magnitude lower than reported effect concentrations in vitro. Safety pharmacology and toxicology evaluations have failed to reveal any significant calcium-like actions in vivo, despite inclusion of high intravenous doses in some cases.Lanthanum carbonate has a low propensity to cause systemic drug interactions due to its poor absorption. However, the higher concentrations present in the gastrointestinal tract can form chelates with some drugs, such as fluoroquinolones, and reduce their absorption. The improved understanding of the pharmacokinetics of lanthanum that has emerged in recent years has helped to explain why the myriad of calcium-like effects described in vitro for lanthanum have little if any relevance in vivo. The pharmacokinetic investigations of lanthanum carbonate formed an important part of the stringent premarketing safety assessment process and have been influential in reassuring both regulators and physicians that the agent can be used safely and effectively in this vulnerable dialysis population. PMID:18698878

Damment, Stephen J P; Pennick, Michael

2008-01-01

179

Reaction mechanism between lanthanum manganite and yttria doped cubic zirconia  

Microsoft Academic Search

The reactivity between lanthanum deficient lanthanum manganite, La0.9MnO3, and yttria doped cubic zirconia (YSZ) has been examined at the temperature range between 1250C and 1400C. The reaction product of La2Zr2O7 was observed after some induced period, which depended on the reaction temperature and the yttrium content in YSZ. The induced period increased with increasing Y2O3 content in ZrO2. The reaction

M Mori; T Abe; H Itoh; O Yamamoto; G. Q Shen; Y Takeda; N Imanishi

1999-01-01

180

High temperature thermal stabilization of alumina modified by lanthanum species  

Microsoft Academic Search

The effects of precursor pretreatment and addition methods of lanthanum species on stabilization of alumina (surface area loss, phase transformations and high temperature interaction with lanthanum species) have been investigated by BET specific surface area measurements (BET), X-ray powder diffraction (XRD), N2 adsorptiondesorption isotherms, thermal analysis and X-ray photoelectron spectroscopy (XPS) in the range of 6001150C. Although powder La2O3, which

Xiaoyin Chen; Yong Liu; Guoxing Niu; Zhuxian Yang; Maiying Bian; Adi He

2001-01-01

181

Preparation of calcium lanthanum sulfide powders via alkoxide sulfurization  

Microsoft Academic Search

This paper reports that calcium lanthanum sulfide powders are prepared by reacting methoxides of calcium and lanthanum with H[sub 2]S. Alkoxide mixtures of various La\\/Ca ratios dispersed in methanol were reacted with H[sub 2]S at 25[degrees] to 85[degrees] C and the amorphous gels obtained after the removal of methanol were heat-treated in H[sub 2]S for full sulfurization at various temperatures.

Yong Han; Mufit Akinc

1991-01-01

182

Lanthanum Halide Nanoparticle Scintillators for Nuclear Radiation Detection  

SciTech Connect

Nanoparticles with sizes <10 nm were fabricated and characterized for their nanocomposite radiation detector properties. This work investigated the properties of several nanostructured radiation scintillators, in order to determine the viability of using scintillators employing nanostructured lanthanum tribromide, lanthanum trifluoride, or cerium tribromide. Preliminary results of this investigation are consistent with the idea that these materials have an intrinsic response to nuclear radiation that may be correlated to the energy of the incident radiation.

Guss, P. P., Guise, R., Yuan, D., Mukhopadhyay, S., O'Brien, R., Lowe, D.

2013-02-01

183

High temperature investigations of lanthanum-nickel oxyphosphate  

Microsoft Academic Search

Thermal analysis X-ray powder diffraction, IR spectroscopy were carried out for the structural studies of lanthanum-nickel oxyphosphate La3(PO4)O3.Ni1?xO. The lanthanum-nickel phase crystallizes in the monoclinic system with the following lattice parametersa=11.57(2);b=12.22(3);c=6.73(2);?=111.36(4);V=886.87(1)3.

J. Kropiwnicka

1990-01-01

184

Diminiode thermionic energy conversion with lanthanum-hexaboride electrodes  

NASA Technical Reports Server (NTRS)

Thermionic conversion data obtained from a variable gap cesium diminiode with a hot pressed, sintered lanthanum hexaboride emitter and an arc melted lanthanum hexaboride collector are presented. Performance curves cover a range of temperatures: emitter 1500 to 1700 K, collector 750 to 1000 K, and cesium reservoir 370 to 510 K. Calculated values of emitter and collector work functions and barrier index are also given.

Kroeger, E. W.; Bair, V. L.; Morris, J. F.

1978-01-01

185

Lanthanum tetrazinc, LaZn4.  

PubMed

The structure of lanthanum tetrazinc, LaZn(4), has been determined from single-crystal X-ray diffraction data for the first time, approximately 70 years after its discovery. The compound exhibits a new structure type in the space group Cmcm, with one La atom and two Zn atoms occupying sites with m2m symmetry, and one Zn atom occupying a site with 2.. symmetry. The structure is closely related to the BaAl(4), La(3)Al(11), BaNi(2)Si(2) and CaCu(5) structure types, which can be presented as close-packed arrangements of 18-vertex clusters, in this case LaZn(18). The kindred structure types contain related 18-vertex clusters around atoms of the rare earth or alkaline earth metal. PMID:22669182

Oshchapovsky, Igor; Pavlyuk, Volodymyr; Dmytriv, Grygoriy; Griffin, Alexandra

2012-06-01

186

46 CFR 151.50-70 - Cargoes requiring inhibition or stabilization.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 2009-10-01 false Cargoes requiring inhibition or stabilization. 151.50-70 Section 151.50-70...Special Requirements § 151.50-70 Cargoes requiring inhibition or stabilization. When table 151.05 refers to this...

2009-10-01

187

46 CFR 151.50-70 - Cargoes requiring inhibition or stabilization.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Cargoes requiring inhibition or stabilization. 151.50-70 Section 151.50-70...Special Requirements § 151.50-70 Cargoes requiring inhibition or stabilization. When table 151.05 refers to this...

2010-10-01

188

Optimizing Lanthanum Chromite Interconnects for Solid Oxide Fuel Cells  

SciTech Connect

Optimizing the composition of strontium substituted lanthanum chromites to minimize expansion is not straightforward and must be done carefully to avoid compromising sinterability, electrical conductivity, and mechanical strength. In this study, a variety of lanthanum strontium chromites were modified with V, Cu, and Mg to allow densification in air at 1500?C, and their materials properties were evaluated. Both additives (?5 mole % V and 2 mole% Cu) resulted in full densification of Sr substituted (10 and 15 mole%) lanthanum chromite. Of the compositions evaluated, only La0.85Sr0.15Cr0.95V0.05O3 appeared to be a promising interconnect material, showing <0.1% expansion at 10-16 atm. While the coefficient of thermal expansion was less than that of stabilized zirconia, small additions of Co (1 mole%) increased the CTE to 10.1 ppm ?C-1. The results of this study indicated that Cu acted as an acceptor when added to lanthanum chromite, increasing both the electrical conductivity and expansion upon reduction. The effect of vanadium additions were two-fold. First, it acted as a donor in the chromite lattice effectively reducing the overall acceptor concentration. Secondly, during sintering, V reacted with Sr to form Sr3(VO4)2, an effective sintering aid for lanthanum chromite, and further reduced the acceptor level by removing Sr from the perovskite lattice.

Armstrong, Timothy R.; Simner, Steven P.; Hardy, John S.; Stevenson, Jeffry W.

1999-08-01

189

Profiling of the Tetraspanin CD151 Web and Conspiracy of CD151/Integrin ?1 Complex in the Progression of Hepatocellular Carcinoma  

PubMed Central

Tetraspanin CD151 has been implicated in metastasis through forming complexes with different molecular partners. In this study, we mapped tetraspanin web proteins centered on CD151, in order to explore the role of CD151 complexes in the progression of hepatocellular carcinoma (HCC). Immunoprecipitation was used to isolate tetraspanin complexes from HCCLM3 cells using a CD151 antibody, and associated proteins were identified by mass spectrometry. The interaction of CD151 and its molecular partners, and their roles in invasiveness and metastasis of HCC cells were assayed through disruption of the CD151 network. Finally, the clinical implication of CD151 complexes in HCC patients was also examined. In this study, we identified 58 proteins, characterized the tetraspanin CD151 web, and chose integrin ?1 as a main partner to further investigate. When the CD151/integrin ?1 complex in HCC cells was disrupted, migration, invasiveness, secretion of matrix metalloproteinase 9, and metastasis were markedly influenced. However, both CD151 and integrin ?1 expression were untouched. HCC patients with high expression of CD151/integrin ?1 complex had the poorest prognosis of the whole cohort of patients. Together, our data show that CD151 acts as an important player in the progression of HCC in an integrin ?1-dependent manner.

Huang, Xiao-Yong; Wang, Xiao-Ying; Shi, Ying-Hong; Ding, Zhen-Bin; Xu, Yang; Dai, Zhi; Fan, Jia; Zhou, Jian

2011-01-01

190

Profiling of the tetraspanin CD151 web and conspiracy of CD151/integrin ?1 complex in the progression of hepatocellular carcinoma.  

PubMed

Tetraspanin CD151 has been implicated in metastasis through forming complexes with different molecular partners. In this study, we mapped tetraspanin web proteins centered on CD151, in order to explore the role of CD151 complexes in the progression of hepatocellular carcinoma (HCC). Immunoprecipitation was used to isolate tetraspanin complexes from HCCLM3 cells using a CD151 antibody, and associated proteins were identified by mass spectrometry. The interaction of CD151 and its molecular partners, and their roles in invasiveness and metastasis of HCC cells were assayed through disruption of the CD151 network. Finally, the clinical implication of CD151 complexes in HCC patients was also examined. In this study, we identified 58 proteins, characterized the tetraspanin CD151 web, and chose integrin ?1 as a main partner to further investigate. When the CD151/integrin ?1 complex in HCC cells was disrupted, migration, invasiveness, secretion of matrix metalloproteinase 9, and metastasis were markedly influenced. However, both CD151 and integrin ?1 expression were untouched. HCC patients with high expression of CD151/integrin ?1 complex had the poorest prognosis of the whole cohort of patients. Together, our data show that CD151 acts as an important player in the progression of HCC in an integrin ?1-dependent manner. PMID:21961047

Devbhandari, Ranjan Prasad; Shi, Guo-Ming; Ke, Ai-Wu; Wu, Fei-Zhen; Huang, Xiao-Yong; Wang, Xiao-Ying; Shi, Ying-Hong; Ding, Zhen-Bin; Xu, Yang; Dai, Zhi; Fan, Jia; Zhou, Jian

2011-01-01

191

Coprecipitation synthesis of doped lanthanum chromite  

SciTech Connect

Two coprecipitation methods were used to synthesize powder precursors of doped lanthanum chromite (La,Ca)(Cr,Co)O[sub 3]. The effects of synthesis method and calcination temperature on the composition, sintered density, and microstructure of pressed compacts of (La,Ca)(Cr,Co)O[sub 3] were studied by differential thermal analysis/thermogravimetric analysis, x-ray diffraction, scanning electron microscopy, and density measurement. The cation ratios in the precipitated solids were, with few exceptions, within experimental error of the desired compositions for all four components. Powders obtained by both techniques could be sintered to densities exceeding 93% at 1400 [degree]C. The highest densities were obtained with calcining temperatures from 450 to 700 [degree]C. The sintered microstructures exhibited uniform grain sizes averaging 3--5 [mu]m. The Cr(VI) compounds, CaCrO[sub 4] and La[sub 2]CrO[sub 6], were observed in all of the calcined powders. The possible role of these phases on chromite densification is discussed.

De Guire, M.R. (Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7204 (United States)); Dorris, S.E.; Poeppel, R.B.; Morissette, S.; Balachandran, U. (Materials and Components Technology Division, Argonne National Laboratory, Argonne Illinois 60439 (United States))

1993-09-01

192

Crystallization of lanthanum and yttrium aluminosilicate glasses  

NASA Astrophysics Data System (ADS)

The crystallization behaviour of aluminosilicate glasses of lanthanum (LAS) and yttrium (YAS) containing 2-8 mol% of Ln 2O 3 (Ln = La or Y), 12-30 mol% of Al 2O 3, and 64-80 mol% of SiO 2 has been studied by DTA, XRD and SEM-EDX analysis. X-ray diffraction results indicate the presence of the mullite phase and La 2Si 2O 7 in the monoclinic high-temperature G form (group space P2 1/c) for the LAS glasses, and mullite y-Y 2Si 2O 7 in the monoclinic structure (group space C2/m) and a small amount of ?-Y 2Si 2O 7 in the orthorhombic structure (space group Pna2) for the YAS. For both cases, very little tridymite phase is observed. The results also show that the values of Tg for YAS are higher than those for LAS glasses. The crystallization of LAS glasses is more difficult than that of YAS. For all samples, we observed only one kind of mullite (Al/Si = 3.14).

Sadiki, Najim; Coutures, Jean Pierre; Fillet, Catherine; Dussossoy, Jean Luc

2006-01-01

193

Reaction between calcium-doped lanthanum chromite and silica  

SciTech Connect

Calcium-doped lanthanum chromite reacted with silica to form silicates and chromium oxide at 1,473--1,773K. A reaction mechanism was proposed at each temperature. At 1,473 K, a reaction zone was observed in two areas: one was the bulk reaction area where silicates and chromium oxide were formed near the reaction interface; the other was the grain boundary reaction where chromium oxide and calcium silicate spots were formed far from the reaction interface. Above 1,673 K, silicates in the La{sub 2}O-CaO-SiO{sub 2} system and chromium oxide were formed simultaneously in the reaction zone with no grain boundary reaction. No layered reaction products were observed in the reaction zone of the lanthanum chromite side. Formation of melt silicates above 1,723 K at the reaction interface resulted in strong bonding between calcium-doped lanthanum chromite and silica.

Horita, Teruhisa, Choi, J.S.; Lee, Y.K.; Sakai, Natsuko; Kawada, Tatsuya; Yokokawa, Harumi; Dokiya, Masayuki [National Institute of Materials and Chemical Research, Tsukuba, Ibaraki (Japan). Tsukuba Research Center

1995-07-01

194

Toughening in lanthanum chromite due to metastable phase  

SciTech Connect

Alkali earth doped lanthanum chromite ceramics are preferred for use in solid oxide fuel cells because of their electronic conductivity and resistance to both oxidizing and reducing atmospheres. However, there is a phase transformation that can be disruptive which occurs at approximately 300 to 400 C at the orthorhombic to rhombohedral phase boundary in undoped and in magnesia or calcia doped lanthanum chromite. The purpose of this research was to investigate air sinterable, chromia deficient, calcia doped lanthanum chromite by 4 point bending for strength (MOR), and toughness (K{sub IC}) versus temperature to 1,000 C. The initial analysis was to verify the results of Mori et al. As-fired specimens sintered at 1,600 C were compared with specimens aged at 1,000 C for 48 hours after sintering at 1,600 C to investigate the effect of any residual transient phases on the properties.

Montross, C.S.; Yokokawa, Harumi; Dokiya, Masayuki [National Inst. for Materials and Chemical Research, Tsukuba, Ibaraki (Japan)] [National Inst. for Materials and Chemical Research, Tsukuba, Ibaraki (Japan)

1996-03-15

195

Synthesis of air-sinterable lanthanum chromite powders  

SciTech Connect

Lanthanum chromites, used as current interconnections in solid oxide fuel cells (SOFCs), have high electrical conductivity and are chemically stable. However, they are difficult to fabricate under conditions compatible with other SOFC components. A novel powder synthesis technique, the glycine/nitrate process, has been developed that produces chromite powders that can be sintered to near-full density in air at 1823 K. This paper describes the glycine/nitrate process for the synthesis and fabrication of lanthanum chromites. The sintering behavior and properties of a series of glycine/nitrate-produced lanthanum chromites are discussed. Some of the materials produced by this method match the thermal expansion of the electrolyte and maintain high electrical conductivity. 16 refs., 10 figs.

Chick, L.A.; Bates, J.L.; Pederson, L.R.; Kissinger, H.E.

1989-10-01

196

Lanthanum Carbonate for Hyperphosphatemia in Patients on Peritoneal Dialysis  

PubMed Central

? Background: The efficacy of the phosphate binder lanthanum carbonate has been demonstrated for hemodialysis patients, but no studies have focused on patients undergoing continuous ambulatory peritoneal dialysis (CAPD). We evaluated whether lanthanum carbonate could control phosphate levels in patients on CAPD. ? Methods: In this 48-week open-label prospective study, 28 patients on CAPD with a phosphate level of 6 mg/dL or greater were given lanthanum carbonate titrated from 750 mg to 2250 mg daily to achieve a target serum phosphate level of less than 6 mg/dL. The primary efficacy endpoint was reduction of serum phosphate to less than 6 mg/dL. Serum levels of calcium and parathyroid hormone were also evaluated, as were the CaP product and adverse effects. ? Results: From week 4 to the end of the study at week 48, we observed a significant reduction of serum phosphate to 5.25 0.97 mg/dL from 6.88 1.06 mg/dL at study start (p < 0.01). At the end of the study, 78.6% of participants had achieved the target of less than 6 mg/dL. Because no change of serum calcium occurred, the CaP product declined significantly during the study. Intact parathyroid hormone declined gradually over the study period, but the change had not reached significance at the end of the study (p = 0.11). The mean final dose of lanthanum carbonate was 946 mg daily. The only adverse effect reported was mild nausea in 1 patient. ? Conclusions: Lanthanum carbonate is an effective phosphate binder that can control serum phosphate and CaP product in CAPD patients with hyperphosphatemia. Lanthanum carbonate was well tolerated in our population.

Ohno, Michiya; Ohashi, Hiroshige; Oda, Hiroshi; Yokoyama, Haruko; Okada, Miho; Nagaya, Mayu; Izumi, Kumiko; Ito, Hitomi; Katoh, Shuji

2013-01-01

197

27 CFR 25.151 - Rate of tax.  

Code of Federal Regulations, 2010 CFR

...THE TREASURY LIQUORS BEER Tax on Beer Liability for Tax 25.151 Rate of tax. All beer, brewed or produced, and removed for consumption or sale, is subject to the tax prescribed by 26 U.S.C. 5051, for every barrel...

2010-04-01

198

33 CFR 151.1506 - Restriction of operation.  

Code of Federal Regulations, 2013 CFR

...Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1506 Restriction of operation...the requirements of this subpart may be operated in the Great Lakes or the Hudson River, north of the George...

2013-07-01

199

Safety analysis of the nuclear chemistry Building 151  

SciTech Connect

This report summarizes the results of a safety analysis that was done on Building 151. The report outlines the methodology, the analysis, and the findings that led to the low hazard classification. No further safety evaluation is indicated at this time. 5 tables.

Kvam, D.

1984-06-29

200

151. Photocopy of drawing (taken from Twin Falls Canal Company ...  

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

151. Photocopy of drawing (taken from Twin Falls Canal Company Surveyor's Transit Book #363, Page 20). SURVEY PRINT SHOWING POINT SPILLWAY AND FIELD NOTES, TWIN FALLS COUNTY NORTHWEST OF MURTAUGH, IDAHO. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

201

25 CFR 151.12 - Action on requests.  

Code of Federal Regulations, 2011 CFR

...in § 151.13 of this part and the exhaustion of any administrative remedies, the Secretary shall publish in the Federal Register, or in a newspaper of general circulation serving the affected area a notice of his/her decision to...

2011-04-01

202

25 CFR 151.9 - Requests for approval of acquisitions.  

Code of Federal Regulations, 2011 CFR

...BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER LAND ACQUISITIONS § 151.9 Requests for approval of...parties, a description of the land to be acquired, and other information which would show that the acquisition comes within the...

2011-04-01

203

19 CFR 151.74 - Retest at port director's request.  

Code of Federal Regulations, 2013 CFR

...EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.74 Retest at port director's request. If...to have another test made upon a suitable sample of the wool or hair at the expense of the Government. When the port director is...

2013-04-01

204

19 CFR 151.62 - Information on invoices.  

Code of Federal Regulations, 2013 CFR

...AND TESTING OF MERCHANDISE Wool and Hair § 151.62 Information on invoices. Invoices of wool or hair subject to duty at a rate per clean...g) Net weight of each lot of wool or hair covered by the invoice in the...

2013-04-01

205

19 CFR 151.71 - Laboratory testing for clean yield.  

Code of Federal Regulations, 2013 CFR

...AND TESTING OF MERCHANDISE Wool and Hair § 151.71 Laboratory testing for clean...to importer. Where samples of wool or hair have been tested in a Customs laboratory...laboratory test is not feasible, the wool or hair may be retested by a commercial...

2013-04-01

206

19 CFR 151.75 - Final determination of clean yield.  

Code of Federal Regulations, 2013 CFR

...EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.75 Final determination of clean yield. The...consideration of all the tests made in connection with the wool or hair concerned. [T.D. 73-175, 38 FR 17470, July 2,...

2013-04-01

207

19 CFR 151.63 - Information on entry summary.  

Code of Federal Regulations, 2013 CFR

...AND TESTING OF MERCHANDISE Wool and Hair § 151.63 Information on entry summary. Each entry summary covering wool or hair subject to duty at a rate per clean...shall show as to each lot of wool or hair covered thereby, in addition to...

2013-04-01

208

19 CFR 151.70 - Method of sampling by Customs.  

Code of Federal Regulations, 2013 CFR

...EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.70 Method of sampling by Customs. A general...feasible to obtain a representative general sample of the wool or hair in a sampling unit or to test such a sample in...

2013-04-01

209

19 CFR 151.67 - Sampling by importer.  

Code of Federal Regulations, 2013 CFR

...EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.67 Sampling by importer. The importer may be...supervision in reasonable quantities from the packages of wool or hair designated for examination, provided the bales or bags are...

2013-04-01

210

19 CFR 151.64 - Extra copy of entry summary.  

Code of Federal Regulations, 2013 CFR

...CONTINUED) EXAMINATION, SAMPLING, AND TESTING OF MERCHANDISE Wool and Hair § 151.64 Extra copy of entry summary. One extra copy of the entry summary covering wool or hair subject to duty at a rate per clean kilogram shall be filed in...

2013-04-01

211

Lanthanum carbonate incorporated chitosan microparticles for phosphate collection  

Microsoft Academic Search

Lanthanum carbonate incorporated chitosan microparticles (LCCM) is proposed for collection of phosphate from 0.9% saline and human plasma serum samples. Loading of ?4.1mg of La2(CO3)33H2O onto 0.1g of chitosan has been achieved. The optimal glutaraldehyde (cross-linker), acetic acid concentration and lanthanum carbonate to chitosan weight ratio for preparation of LCCM were found to be 84.685.7%, 0.30.4moll?1, and 1:1 respectively. Moreover,

P. K. Aneesh; K. P. Prathish; R. Kala; T. Prasada Rao

2009-01-01

212

Syntesis of lanthanum zirconate hydrosols by the ion exchange method  

NASA Astrophysics Data System (ADS)

Ion exchange of LaCl3 and ZrOCl2 aqueous solutions with anion-exchanger AV-17-8 was used to synthesize finely dispersed hydrosol of amorphous lanthanum zirconate La2Zr2O7. Heat treatment of dried La2Zr2O7 hydrosols at 700C and 1100C resulted in the formation of powders with fluorite and pyrochlore type structures, respectively. Epitaxial La2Zr2O7 films were obtained on SrTiO3 (001) single crystals. The substrate has an influence on the lanthanum zirconate crystal orientation, as well as strong inhibitory effect on sintering processes.

Bovina, E. A.; Tarasova, J. V.; Chibirova, F. Kh

2011-04-01

213

Tier 2 safety Basis Document for the B151 Complex (B151, B152, and B154)  

SciTech Connect

This Safety Basis Document (SBD) has been prepared for the B151 Complex at Site 200 to meet the current contractual requirements at Lawrence Livermore National Laboratory (LLNL). B151 Complex consists of three separate complex and distinct buildings: B151, B152, and B154, represented within this document as facility segments. Based upon its chemical and radiological inventories, Segment B151 is classified as a Low Hazard facility segment. All other hazards associated with Segment B151 operations have been determined to be LSI. Based upon their inventories, Segment B152 and Segment B154 are each classified as LSI facility segments. However, for operational flexibility involving radiological materials, CMS chooses to classify each of these as Low Hazard facility segments. Changes in operations, maximum inventories, materials, or release potential that could result in larger consequences, or that could negatively impact the safety of the facility, will necessitate a re-evaluation of these facility classifications. This SBD is governed by the LLNL Non-Nuclear Work Smart Standards (WSSs) requirements including the ES&H Manual, Document 3.1, Non-Nuclear Safety Basis Program [LLNL, 2004a] and the DOE Explosives Safety Manual (ESM) [LLNL, 2004b]. This SBD demonstrates that the three segments of B151 Complex can be operated as Low Hazard facility segments without undue risks to co-located workers, the public, or the environment. This SBD: (1) Provides a systematic identification of the safety and health hazards associated with operations in the B151 Complex, (2) Compares facility inventories of explosives, biological materials, chemicals, radioisotopes with LLNL threshold values for each facility hazard classification criteria, (3) Examines standard and non-standard industrial hazards, (4) Examines the hazards of greatest significance, (5) Qualitatively discusses the programs that evaluate and control these hazards to ensure the protection of co-located workers, the public, and the environment, and (6) Addresses the required administrative controls and design features that would eliminate, control, and/or mitigate the identified hazards.

Cooper, G A

2006-12-07

214

Optical and physical properties of lanthanum gallogermanate glasses  

Microsoft Academic Search

Optical properties of lanthanum gallogermanate glasses were investigated by infrared (IR) transmission and IR reflectivity measurements. Several physical properties of these glasses, including density, index of refraction and ultrasonic velocities, were also measured. The experimental results are used to obtain elastic constants. These glasses are transparent over frequencies ranging from the near ultraviolet to the mid-IR (?8 ?m) and have

Luu-Gen Hwa; Yi-Rui Chang; Sung-Ping Szu

1998-01-01

215

Ab initio energetics of lanthanum substitution in ferroelectric bismuth titanate.  

PubMed

Using first principles calculations and atomistic thermodynamics the bulk and defect properties of orthorhombic bismuth titanate (Bi?Ti?O??) and bismuth lanthanum titanate (Bi?.??La?.??Ti?O??) have been investigated. Heats of formation, valid chemical conditions for synthesis, lanthanum substitution energies and oxygen and bismuth vacancy formation energies have been computed. The study improves our understanding of how native point defects and substitutional impurities influence the ferroelectric properties of these layered perovskite materials. It is found that lanthanum incorporation could occur on either of the two distinct bismuth sites in the structure and that the effect of substitution is to increase the formation energy of nearby native oxygen vacancies. The results provide direct atomistic evidence over a range of chemical conditions supporting the suggestion that lanthanum incorporation reduces the oxygen vacancy concentration. Oxygen vacancies contribute to ferroelectric fatigue by interacting strongly with domain walls, and therefore a decrease in their concentration is beneficial. The conditions that favor the greatest reduction in oxygen vacancy concentration are described. PMID:21460424

Shah, S H; Bristowe, P D

2011-04-20

216

Sintering and Property Characterization of Strontium-Doped Lanthanum Chromite  

SciTech Connect

Sr-doped lanthanum chromite (LSC-15 LA 0.85Sr 0.15 CrO3) is difficult to sinter to high densities in air. Typically <705 theoretical density at 1600 degrees C. This study considers three methods to enhance the densification of LSC-15.

Simner, Steven P.; Hardy, John S.; Stevenson, Jeffry W.; Armstrong, Timothy R.

1999-12-01

217

9 CFR 151.10 - Recognition of additional breeds and books of record.  

Code of Federal Regulations, 2010 CFR

...2009-01-01 false Recognition of additional breeds and books of record. 151.10 Section 151...INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE ANIMAL BREEDS RECOGNITION OF BREEDS AND BOOKS OF RECORD OF PUREBRED ANIMALS...

2009-01-01

218

29 CFR 1615.151 - Program accessibility: New construction and alterations.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Program accessibility: New construction and alterations. 1615.151 Section...COMMISSION ELECTRONIC AND INFORMATION TECHNOLOGY § 1615.151 Program accessibility: New construction and alterations. Each building...

2010-07-01

219

29 CFR 1615.151 - Program accessibility: New construction and alterations.  

Code of Federal Regulations, 2010 CFR

...2009-07-01 false Program accessibility: New construction and alterations. 1615.151 Section...COMMISSION ELECTRONIC AND INFORMATION TECHNOLOGY § 1615.151 Program accessibility: New construction and alterations. Each building...

2009-07-01

220

14 CFR 151.24 - Procedures: Application; information on estimated project costs.  

...Application; information on estimated project costs. 151.24 Section 151.24...Application; information on estimated project costs. (a) If any part of the estimated project costs consists of the value of...

2014-01-01

221

14 CFR 151.24 - Procedures: Application; information on estimated project costs.  

Code of Federal Regulations, 2013 CFR

...Application; information on estimated project costs. 151.24 Section 151.24...Application; information on estimated project costs. (a) If any part of the estimated project costs consists of the value of...

2013-01-01

222

14 CFR 151.43 - United States share of project costs.  

...false United States share of project costs. 151.43 Section 151.43...43 United States share of project costs. (a) The United States share of the allowable costs of a project is stated in the grant...

2014-01-01

223

14 CFR 151.43 - United States share of project costs.  

Code of Federal Regulations, 2011 CFR

...false United States share of project costs. 151.43 Section 151.43...43 United States share of project costs. (a) The United States share of the allowable costs of a project is stated in the grant...

2011-01-01

224

14 CFR 151.43 - United States share of project costs.  

Code of Federal Regulations, 2012 CFR

...false United States share of project costs. 151.43 Section 151.43...43 United States share of project costs. (a) The United States share of the allowable costs of a project is stated in the grant...

2012-01-01

225

14 CFR 151.24 - Procedures: Application; information on estimated project costs.  

Code of Federal Regulations, 2012 CFR

...Application; information on estimated project costs. 151.24 Section 151.24...Application; information on estimated project costs. (a) If any part of the estimated project costs consists of the value of...

2012-01-01

226

14 CFR 151.43 - United States share of project costs.  

Code of Federal Regulations, 2013 CFR

...false United States share of project costs. 151.43 Section 151.43...43 United States share of project costs. (a) The United States share of the allowable costs of a project is stated in the grant...

2013-01-01

227

14 CFR 151.43 - United States share of project costs.  

Code of Federal Regulations, 2010 CFR

...false United States share of project costs. 151.43 Section 151.43...43 United States share of project costs. (a) The United States share of the allowable costs of a project is stated in the grant...

2010-01-01

228

14 CFR 151.24 - Procedures: Application; information on estimated project costs.  

Code of Federal Regulations, 2010 CFR

...Application; information on estimated project costs. 151.24 Section 151.24...Application; information on estimated project costs. (a) If any part of the estimated project costs consists of the value of...

2010-01-01

229

14 CFR 151.24 - Procedures: Application; information on estimated project costs.  

Code of Federal Regulations, 2011 CFR

...Application; information on estimated project costs. 151.24 Section 151.24...Application; information on estimated project costs. (a) If any part of the estimated project costs consists of the value of...

2011-01-01

230

33 CFR 151.1512 - Implementation schedule for approved ballast water management methods.  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01...Implementation schedule for approved ballast water management methods. 151.1512 Section 151.1512 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2013-07-01

231

33 CFR 151.2040 - Discharge of ballast water in extraordinary circumstances.  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Discharge of ballast water in extraordinary circumstances. 151...151.2040 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2013-07-01

232

33 CFR 151.2035 - Implementation schedule for approved ballast water management methods.  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01...Implementation schedule for approved ballast water management methods. 151.2035 Section 151.2035 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2013-07-01

233

26 CFR 31.3121(a)(15)-1 - Payments by employer to disabled former employee.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Payments by employer to disabled former employee. 31.3121(a)(15)-1 Section 31...3121(a)(15)-1 Payments by employer to disabled former employee. The term wages does not include...

2009-04-01

234

26 CFR 31.3121(a)(15)-1 - Payments by employer to disabled former employee.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Payments by employer to disabled former employee. 31.3121(a)(15)-1 Section 31...3121(a)(15)-1 Payments by employer to disabled former employee. The term wages does not include...

2010-04-01

235

25 CFR 224.151 - When may the Secretary reassume activities?  

Code of Federal Regulations, 2011 CFR

...224.151 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR ENERGY AND MINERALS TRIBAL ENERGY RESOURCE AGREEMENTS UNDER THE INDIAN TRIBAL ENERGY DEVELOPMENT AND SELF DETERMINATION ACT Reassumption § 224.151 When...

2011-04-01

236

32 CFR 935.151 - Island permit for boat and vehicle.  

Code of Federal Regulations, 2013 CFR

... 6 2013-07-01 2013-07-01 false Island permit for boat and vehicle. 935.151 Section...FORCE TERRITORIAL AND INSULAR REGULATIONS WAKE ISLAND CODE Registration and Island Permits § 935.151 Island permit for...

2013-07-01

237

33 CFR 151.79 - Operating requirements: Discharge of sewage within Antarctica.  

Code of Federal Regulations, 2010 CFR

...false Operating requirements: Discharge of sewage within Antarctica. 151.79 Section 151.79 Navigation and Navigable...79 Operating requirements: Discharge of sewage within Antarctica. (a) A vessel certified to carry more than 10...

2010-07-01

238

33 CFR 151.79 - Operating requirements: Discharge of sewage within Antarctica.  

Code of Federal Regulations, 2013 CFR

...false Operating requirements: Discharge of sewage within Antarctica. 151.79 Section 151.79 Navigation and Navigable...79 Operating requirements: Discharge of sewage within Antarctica. (a) A vessel certified to carry more than 10...

2013-07-01

239

33 CFR 151.79 - Operating requirements: Discharge of sewage within Antarctica.  

Code of Federal Regulations, 2010 CFR

...false Operating requirements: Discharge of sewage within Antarctica. 151.79 Section 151.79 Navigation and Navigable...79 Operating requirements: Discharge of sewage within Antarctica. (a) A vessel certified to carry more than 10...

2009-07-01

240

33 CFR 151.73 - Operating requirements: Discharge of garbage from fixed or floating platforms.  

Code of Federal Regulations, 2013 CFR

...requirements: Discharge of garbage from fixed or floating platforms. 151.73 Section 151...Discharge of garbage from fixed or floating platforms. (a) Except as allowed...discharge garbage from (1) A fixed or floating platform engaged in the...

2013-07-01

241

33 CFR 151.2040 - Discharge of ballast water in extraordinary circumstances.  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Discharge of ballast water in extraordinary circumstances. 151...151.2040 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2012-07-01

242

33 CFR 151.1512 - Implementation schedule for approved ballast water management methods.  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01...Implementation schedule for approved ballast water management methods. 151.1512 Section 151.1512 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2012-07-01

243

33 CFR 151.2035 - Implementation schedule for approved ballast water management methods.  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01...Implementation schedule for approved ballast water management methods. 151.2035 Section 151.2035 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2012-07-01

244

33 CFR 151.79 - Operating requirements: Discharge of sewage within Antarctica.  

Code of Federal Regulations, 2012 CFR

...false Operating requirements: Discharge of sewage within Antarctica. 151.79 Section 151.79 Navigation and Navigable...79 Operating requirements: Discharge of sewage within Antarctica. (a) A vessel certified to carry more than 10...

2012-07-01

245

33 CFR 151.79 - Operating requirements: Discharge of sewage within Antarctica.  

Code of Federal Regulations, 2011 CFR

...false Operating requirements: Discharge of sewage within Antarctica. 151.79 Section 151.79 Navigation and Navigable...79 Operating requirements: Discharge of sewage within Antarctica. (a) A vessel certified to carry more than 10...

2011-07-01

246

19 CFR 151.28 - Gauging of sirup or molasses discharged into storage tanks.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Gauging of sirup or molasses discharged into storage tanks. 151.28...TESTING OF MERCHANDISE Sugars, Sirups, and Molasses § 151.28 Gauging of sirup or molasses discharged into storage tanks. (a)...

2009-04-01

247

19 CFR 151.28 - Gauging of sirup or molasses discharged into storage tanks.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Gauging of sirup or molasses discharged into storage tanks. 151.28...TESTING OF MERCHANDISE Sugars, Sirups, and Molasses § 151.28 Gauging of sirup or molasses discharged into storage tanks. (a)...

2010-04-01

248

14 CFR 151.43 - United States share of project costs.  

Code of Federal Regulations, 2010 CFR

...false United States share of project costs. 151.43 Section 151.43...43 United States share of project costs. (a) The United States share of the allowable costs of a project is stated in the grant...

2009-01-01

249

Proton emission from an oblate nucleus 151Lu  

NASA Astrophysics Data System (ADS)

Excited states in the proton-unbound nucleus 151Lu have been established using ?-ray coincidence techniques. The lifetime of the first excited state above the proton-emitting ground state has been measured using the recoil-distance Doppler-shift method combined with recoil-decay tagging. The experimental level scheme and extracted lifetime have been compared with state-of-the-art theoretical calculations based upon a non-adiabatic deformed Woods-Saxon potential. This comparison suggests that the proton-emitting ground state in 151Lu is mildly oblate with a deformation ?=-0.11-0.05+0.02 and represents the best evidence to date for proton emission from an oblate nucleus.

Procter, M. G.; Cullen, D. M.; Taylor, M. J.; Alharshan, G. A.; Ferreira, L. S.; Maglione, E.; Auranen, K.; Grahn, T.; Greenlees, P. T.; Jakobsson, U.; Julin, R.; Herz?, A.; Konki, J.; Leino, M.; Pakarinen, J.; Partanen, J.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarn, J.; Stolze, S.; Scholey, C.; Sorri, J.; Uusitalo, J.; Braunroth, T.; Ellinger, E.; Dewald, A.; Joss, D. T.; McPeake, C.; Saygi, B.

2013-08-01

250

7 CFR 1.51 - Claims based on negligence, wrongful act or omission.  

Code of Federal Regulations, 2010 CFR

... 2009-01-01 2009-01-01 false Claims based on negligence, wrongful act or omission. 1.51 Section 1.51 Agriculture...ADMINISTRATIVE REGULATIONS Claims § 1.51 Claims based on negligence, wrongful act or omission. (a) Authority of the...

2009-01-01

251

7 CFR 1.51 - Claims based on negligence, wrongful act or omission.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 2010-01-01 false Claims based on negligence, wrongful act or omission. 1.51 Section 1.51 Agriculture...ADMINISTRATIVE REGULATIONS Claims § 1.51 Claims based on negligence, wrongful act or omission. (a) Authority of the...

2010-01-01

252

33 CFR 151.32 - Special areas for the purpose of Annex II.  

Code of Federal Regulations, 2010 CFR

...of §§ 151.30 through 151.49, the special areas are the Baltic Sea area, the Black Sea area, and the Antarctic area which...MARPOL 73/78, the discharge restrictions in § 151.32 for the Baltic Sea area and the Black Sea area will enter into effect...

2010-07-01

253

33 CFR 151.32 - Special areas for the purpose of Annex II.  

Code of Federal Regulations, 2010 CFR

...of §§ 151.30 through 151.49, the special areas are the Baltic Sea area, the Black Sea area, and the Antarctic area which...MARPOL 73/78, the discharge restrictions in § 151.32 for the Baltic Sea area and the Black Sea area will enter into effect...

2009-07-01

254

Catalytic asymmetric Michael reactions promoted by a lithium-free lanthanum-BINOL complex  

SciTech Connect

In this communication, we report about a new lithium-free BINOL-lanthanum complex, which is quite effective in catalytic asymmetric Michael reaction. We have succeeded in developing effective asymmetric base catalysts, in particular, asymmetric ester enolate catalysts for asymmetric Michael reactions. Two asymmetric lanthanum complexes are now available, namely, BINOL-lanthanum-lithium complex, which is quite effective in catalytic asymmetric nitrosaldol reactions, and a new lithium-free BINOL-lanthanum ester enolate complex, that is very effective in catalytic asymmetric Michael reactions. The two complexes complement each other in their ability to catalyze asymmetric nitroaldol and asymmetric Michael reactions. 14 refs., 1 fig., 2 tabs.

Sasai, Hiroaki; Arai, Takayoshi; Shibasaki, Masakatsu (Univ. of Tokyo (Japan))

1994-02-23

255

Overexpression of CD151 Predicts Prognosis in Patients with Resected Gastric Cancer  

PubMed Central

Purpose The tetraspanin CD151 acts as a promoter of metastasis and invasion in several tumors. However, the role of CD151 in human gastric cancer (HGC) remains unclear. Methods Twenty HGC specimens and matched nontumor samples, human gastric epithelial cells (HGEC), and four gastric cancer cell lines were used to analyze CD151 expression. Short hairpin RNA-mediated downregulation of CD151 expression in HGC cells was performed to examine the role of CD151 in the proliferation and metastasis/invasion of HGC cells in vivo and in vitro. The relationship of CD151 with integrin ?3 in HGC cells was investigated by silencing integrin ?3 followed by co-immunoprecipitation and immunofluorescence staining. Finally, the prognostic value of CD151 and integrin ?3 was evaluated by immunohistochemistry in tissue microarrays of 76 HGC patients. Results CD151 was expressed at higher levels in HGC tissues and HGC cells than in nontumor tissues and HGEC cells. Down-regulation of CD151 by vshRNA-CD151 impaired metastasis and invasion of HGC-27 cells, but did not affect cell proliferation. CD151 formed a complex with integrin ?3 in HGC cells. CD151-cDNA transfection rescued the metastatic potential and invasiveness of HGC-27-vshCD151 cells, but not those of HGC-27-vshintegrin ?3 cells in vitro. Clinically, CD151 overexpression was significantly correlated with high TNM stage, depth of invasion and positive lymph node involvement (p<0.05), and high levels of integrin ?3 were associated with large tumor size, high TNM stage, depth of invasion and lymph node involvement (p<0.05). Importantly, the postoperative 5-year overall survival of patients with CD151low and/or integrin ?3low was higher than that of patients with CD151high and/or integrin ?3high. Conclusion CD151 is positively associated with the invasiveness of HGC, and CD151 or the combination of CD151 and integrin ?3 is a novel marker for predicting the prognosis of HGC patients and may be potential therapeutic targets.

Yang, Yue-Ming; Zhang, Zhong-Wei; Liu, Qing-Meng; Sun, Yi-Feng; Yu, Ji-Ren; Xu, Wei-Xing

2013-01-01

256

Nanostructured Lanthanum Zirconate Coating and Its Thermal Stability Properties  

Microsoft Academic Search

In this paper, nano-La2Zr2O7 thermal barrier coatings (MCrAlY+ La2Zr2O7) were prepared by atmospheric plasma sprayed (APS). The microstructures and thermal stability properties were systematically studied to compare with their conventional counterparts by Scanning Electric Microscopy (SEM) transmission electron microscope (TEM) and X-Ray diffraction(XRD). The results showed that the nanostructured lanthanum zirconate coatings were typical lamellar structure which was composed of

Xiao-dong ZHAO; Ke-li ZENG; Jian-gang XIE; Zhen-duo LI

2007-01-01

257

Ferroelectric domain structure of lanthanum-modified lead titanate ceramics  

Microsoft Academic Search

The ferroelectric domain configurations in lanthanum-modified lead titanate ceramics have been studied by transmission electron microscopy in conventional, analytical, and high-resolution modes. Results indicate a preponderance of {l brace}101{r brace}, twin-related 90° domains of equilibrium width 50 to 100 nm. These values are consistent with those derived from consideration of elastic strain energy. Below a critical grain size of approximately

Brain G. Demczyk; Raghaw S. Rai; Gareth Thomas

1990-01-01

258

Effect of pressure on the magnetic properties of lanthanum manganite  

SciTech Connect

The crystalline structure of pure lanthanum manganite under external hydrostatic pressure has been studied. The behavior of magnetic properties and nuclear magnetic resonance (NMR) spectra under these conditions is theoretically predicted. It is shown that an increase in the Neel temperature with pressure is not only caused by the general contraction of the crystal, but is also related to certain peculiarities in the baric behavior of the orbital structure.

Gonchar', L. E., E-mail: Lyudmila.Gonchar@usu.ru; Leskova, Yu. V.; Nikiforov, A. E. [Ural State University (Russian Federation); Kozlenko, D. P. [Joint Institute for Nuclear Research (Russian Federation)

2010-08-15

259

Lanthanum halide nanoparticle scintillators for nuclear radiation detection  

SciTech Connect

Nanoparticles with sizes <10 nm were fabricated and characterized for their nanocomposite radiation detector properties. This work investigated the properties of several nanostructured radiation scintillators, in order to determine the viability of using scintillators employing nanostructured lanthanum trifluoride. Preliminary results of this investigation are consistent with the idea that these materials have an intrinsic response to nuclear radiation that may be correlated to the energy of the incident radiation.

Guss, Paul; Guise, Ronald [Remote Sensing Laboratory, P.O. Box 98521, M/S RSL-48, Las Vegas, Nevada 89193 (United States); Yuan Ding [National Security Technologies, LLC, Los Alamos Operations, P.O. Box 809, M/S LAO/C320, Los Alamos, New Mexico 87544 (United States); Mukhopadhyay, Sanjoy [Remote Sensing Laboratory-Andrews, Building 1783, Arnold Avenue Andrews AFB, Maryland 20762 (United States); O'Brien, Robert; Lowe, Daniel [University of Nevada, Las Vegas, 4505 S. Maryland Parkway, Las Vegas, Nevada 89154 (United States); Kang Zhitao; Menkara, Hisham [Georgia Tech Research Institute, 925 Dalney St., Atlanta, Georgia 30332 (United States); Nagarkar, Vivek V. [RMD, Inc., 44 Hunt Street, Watertown, Massachusetts 02472 (United States)

2013-02-14

260

Magnetic properties of lanthanum orthoferrites containing lattice defects  

Microsoft Academic Search

Polycrystalline lanthanum orthoferrites were prepared by firing coprecipitated hydroxides of La3+ and Fe3+ at elevated temperatures. The materials fired at temperatures below 1100C were characterized by the coexistence of such lattice vacancies that the concentration ratio of VLa:VFe:Vo is always equal to that of the constituent atoms of LaFeO3. They exhibited a large magnetic susceptibility, a low Nel temperature, and

Hiroshi Yamamura; Shin-Ichi Shirasaki; Hirotoshi Oshima; Kazuyuki Kakegawa

1976-01-01

261

Lanthanum halide nanoparticle scintillators for nuclear radiation detection  

NASA Astrophysics Data System (ADS)

Nanoparticles with sizes <10 nm were fabricated and characterized for their nanocomposite radiation detector properties. This work investigated the properties of several nanostructured radiation scintillators, in order to determine the viability of using scintillators employing nanostructured lanthanum trifluoride. Preliminary results of this investigation are consistent with the idea that these materials have an intrinsic response to nuclear radiation that may be correlated to the energy of the incident radiation.

Guss, Paul; Guise, Ronald; Yuan, Ding; Mukhopadhyay, Sanjoy; O'Brien, Robert; Lowe, Daniel; Kang, Zhitao; Menkara, Hisham; Nagarkar, Vivek V.

2013-02-01

262

Some properties of strontium-doped lanthanum chromite  

Microsoft Academic Search

The properties of strontium-doped lanthanum chromite (La084Sr016CrO3) are discussed, with particular attention to its application as an electrode material for MHD power generation. The influence of firing temperature on the ceramic properties and the behaviour of strontium carbonate as a sintering agent are described. The thermal conductivity is 51 w m?1 degk?1 between 1100 and 2000k, and the thermal expansion

D B Meadowcroft

1969-01-01

263

Mechanical properties of calcium- and strontium-substituted lanthanum chromite  

Microsoft Academic Search

Mechanical properties of acceptor (calcium and strontium)-substituted lanthanum chromites are reported as a function of composition, temperature and environment. The strength dependence on temperature for these perovskite conductors was found to depend on the acceptor type, with the calcium-substituted chromites showing a significant reduction in strength with increasing temperature, while the strength of strontium-substituted chromites was essentially invariant with temperature.

S. W. PAULIK; S. BASKARAN; T. R Armstrong

1998-01-01

264

Study on the exp 151 Gd Excited States in the exp 151 Tb (Tsub(1/2)=16.4 H) Decay.  

National Technical Information Service (NTIS)

For the purpose to specify the scheme of exp 151 Tb decay, energies, intensities of p-transitions and respectively balance of intensities and energies of exp 151 Gd levels the spectra of e- gamma -coincidences, gamma -rays, and internal conversion electro...

N. B. Badalov A. Budzyak T. Vylov Kim Zaj Te V. V. Kuznetsov

1981-01-01

265

Magnetoresistance of lanthanum manganites with activation-type conductivity  

SciTech Connect

The temperature dependence of the resistivity and magnetic moment of La{sub 0.85}Ba{sub 0.15}MnO{sub 3} and La{sub 0.85}Sr{sub 0.15}MnO{sub 3} manganite single crystals in magnetic fields up to 90 kOe is investigated. Analysis of the experimental results shows that the magnetoresistance of lanthanum manganites far from the Curie temperature T{sub C} can be described quantitatively by the s-d model normally used for ferromagnets and taking into account only the exchange interaction between the spins of charge carriers and magnetic moments. These data also show that the features of lanthanum manganites responsible for colossal magnetoresistance (CMR) are manifested in a narrow temperature interval {delta}T Almost-Equal-To 20 K near T{sub C}. Our results suggest a CMR mechanism analogous to the mechanism of giant magnetoresistance (GMR) observed in Fe/Cr-type multilayers with nanometer layer thickness. The nanostratification observed in lanthanum manganites and required for GMR can be described taking into account the spread in T{sub C} in the CMR range {delta}T.

Kurkin, M. I., E-mail: kurkin@imp.uran.ru; Neifeld, E. A.; Korolev, A. V.; Ugryumova, N. A.; Gudin, S. A.; Gapontseva, N. N. [Russian Academy of Sciences, Institute of Metal Physics, Ural Branch (Russian Federation)

2013-05-15

266

Electrochemical Deposition of Lanthanum Telluride Thin Films and Nanowires  

NASA Astrophysics Data System (ADS)

Tellurium alloys are characterized by their high performance thermoelectric properties and recent research has shown nanostructured tellurium alloys display even greater performance than bulk equivalents [1-2]. Increased thermoelectric efficiency of nanostructured materials have led to significant interests in developing thin film and nanowire structures. Here, we report on the first successful electrodeposition of lanthanum telluride thin films and nanowires. The electrodeposition of lanthanum telluride thin films is performed in ionic liquids at room temperature. The synthesis of nanowires involves electrodepositing lanthanum telluride arrays into anodic aluminum oxide (AAO) nanoporous membranes. These novel procedures can serve as an alternative means of simple, inexpensive and laboratory-environment friendly methods to synthesize nanostructured thermoelectric materials. The thermoelectric properties of thin films and nanowires will be presented to compare to current state-of-the-art thermoelectric materials. The morphologies and chemical compositions of the deposited films and nanowires are characterized using SEM and EDAX analysis. References: [1] D. M. Rowe, CRC Handbook of Thermoelectrics, CRC Press (1995). [2] A. May et al., Phys. Rev. B 78, 125205 (2008).

Chi, Su; Farias, Stephen; Cammarata, Robert

2013-03-01

267

AGR-2 Data Qualification Report for ATR Cycles 149B, 150A, 150B, 151A, and 151B  

SciTech Connect

This report provides the data qualification status of AGR-2 fuel irradiation experimental data from Advanced Test Reactor (ATR) cycles 149B, 150A, 150B, 151A, and 151B), as recorded in the Nuclear Data Management and Analysis System (NDMAS). The AGR-2 data streams addressed include thermocouple temperatures, sweep gas data (flow rate, pressure, and moisture content), and fission product monitoring system (FPMS) data for each of the six capsules in the experiment. A total of 3,307,500 5-minute thermocouple and sweep gas data records were received and processed by NDMAS for this period. There are no AGR-2 data for cycle 150A because the experiment was removed from the reactor. Of these data, 82.2% were determined to be Qualified based on NDMAS accuracy testing and data validity assessment. There were 450,557 Failed temperature records due to thermocouple failures, and 138,528 Failed gas flow records due to gas flow cross-talk and leakage problems that occurred in the capsules after cycle 150A. For FPMS data, NDMAS received and processed preliminary release rate and release-to-birth rate ratio (R/B) data for the first three reactor cycles (cycles 149B, 150B, and 151B). This data consists of 45,983 release rate records and 45,235 R/B records for the 12 radionuclides reported. The qualification status of these FPMS data has been set to In Process until receipt of QA-approved data generator reports. All of the above data have been processed and tested using a SAS-based enterprise application software system, stored in a secure Structured Query Language database, and made available on the NDMAS Web portal (http://ndmas.inl.gov) for both internal and external VHTR project participants.

Michael L. Abbott; Binh T. Pham

2012-06-01

268

Tetraspanin CD151 plays a key role in skin squamous cell carcinoma.  

PubMed

Here we provide the first evidence that tetraspanin CD151 can support de novo carcinogenesis. During two-stage mouse skin chemical carcinogenesis, CD151 reduces tumor lag time and increases incidence, multiplicity, size and progression to malignant squamous cell carcinoma (SCC), while supporting both cell survival during tumor initiation and cell proliferation during the promotion phase. In human skin SCC, CD151 expression is selectively elevated compared with other skin cancer types. CD151 support of keratinocyte survival and proliferation may depend on activation of transcription factor STAT3 (signal transducers and activators of transcription), a regulator of cell proliferation and apoptosis. CD151 also supports protein kinase C (PKC)?-?6?4 integrin association and PKC-dependent ?4 S1424 phosphorylation, while regulating ?6?4 distribution. CD151-PKC? effects on integrin ?4 phosphorylation and subcellular localization are consistent with epithelial disruption to a less polarized, more invasive state. CD151 ablation, while minimally affecting normal cell and normal mouse functions, markedly sensitized mouse skin and epidermoid cells to chemicals/drugs including 7,12-dimethylbenz[?]anthracene (mutagen) and camptothecin (topoisomerase inhibitor), as well as to agents targeting epidermal growth factor receptor, PKC, Jak2/Tyk2 and STAT3. Hence, CD151 'co-targeting' may be therapeutically beneficial. These findings not only support CD151 as a potential tumor target, but also should apply to other cancers utilizing CD151/laminin-binding integrin complexes. PMID:22824799

Li, Q; Yang, X H; Xu, F; Sharma, C; Wang, H-X; Knoblich, K; Rabinovitz, I; Granter, S R; Hemler, M E

2013-04-01

269

Tetraspanin CD151 plays a key role in skin squamous cell carcinoma  

PubMed Central

Here we provide the first evidence that tetraspanin CD151 can support de novo carcinogenesis. During two-stage mouse skin chemical carcinogenesis, CD151 reduces tumor lag time and increases incidence, multiplicity, size, and progression to malignant squamous cell carcinoma (SCC), while supporting both cell survival during tumor initiation and cell proliferation during the promotion phase. In human skin SCC, CD151 expression is selectively elevated compared to other skin cancer types. CD151 support of keratinocyte survival and proliferation may depend on activation of transcription factor STAT3, a regulator of cell proliferation and apoptosis. CD151 also supports PKC?-?6?4 integrin association and PKC-dependent ?4 S1424 phosphorylation, while regulating ?6?4 distribution. CD151-PKC? effects on integrin ?4 phosphorylation and subcellular localization are consistent with epithelial disruption to a less polarized, more invasive state. CD151 ablation, while minimally affecting normal cell and normal mouse functions, markedly sensitized mouse skin and epidermoid cells to chemicals/drugs including DMBA (mutagen) and camptothecin (topoisomerase inhibitor), as well as to agents targeting EGFR, PKC, Jak2/Tyk2, and STAT3. Hence, CD151 co-targeting may be therapeutically beneficial. These findings not only support CD151 as a potential tumor target, but also should apply to other cancers utilizing CD151-laminin-binding integrin complexes.

Li, Qinglin; Yang, Xiuwei H.; Xu, Fenghui; Sharma, Chandan; Wang, Hong-Xing; Knoblich, Konstantin; Rabinovitz, Isaac; Granter, Scott R.; Hemler, Martin E.

2012-01-01

270

Function of the Tetraspanin CD151-?6?1 Integrin Complex during Cellular Morphogenesis  

PubMed Central

Upon plating on basement membrane Matrigel, NIH3T3 cells formed an anastomosing network of cord-like structures, inhibitable by anti-?6?1 integrin antibodies. For NIH3T3 cells transfected with human CD151 protein, the formation of a cord-like network was also inhibitable by anti-CD151 antibodies. Furthermore, CD151 and ?6?1 were physically associated within NIH3T3 cells. On removal of the short 8-amino acid C-terminal CD151 tail (by deletion or exchange), exogenous CD151 exerted a dominant negative effect, as it almost completely suppressed ?6?1-dependent cell network formation and NIH3T3 cell spreading on laminin-1 (an ?6?1 ligand). Importantly, mutant CD151 retained ?6?1 association and did not alter ?6?1-mediated cell adhesion to Matrigel. In conclusion, the CD151?6?1 integrin complex acts as a functional unit that markedly influences cellular morphogenesis, with the CD151 tail being of particular importance in determining the outside-in functions of ?6?1-integrin that follow ligand engagement. Also, antibodies to ?6?1 and CD151 inhibited formation of endothelial cell cord-like networks, thus pointing to possible relevance of CD151?6?1 complexes during angiogenesis.

Zhang, Xin A.; Kazarov, Alexander R.; Yang, Xiuwei; Bontrager, Alexa L.; Stipp, Christopher S.; Hemler, Martin E.

2002-01-01

271

Engineered hydrochar composites for phosphorus removal/recovery: Lanthanum doped hydrochar prepared by hydrothermal carbonization of lanthanum pretreated rice straw.  

PubMed

Engineered hydrochar composites (EHC) were synthesized by hydrothermal carbonization (HTC) of lanthanum pretreated rice straw. The as-prepared composite with about 30% lanthanum content showed greater P removal potential than La(OH)3, indicating the synergistic effect of hydrochar and lanthanum in P removal. The adsorption results showed that EHC showed great P adsorption capacities (>50mgPg(-1)) in the pH range of 2.5-10.5, and the presence of competing anions had little negative effects on P adsorption on EHC. The equilibrium time for P adsorption on EHC was considerably reduced under acid condition (12h) compared to alkaline condition (48h). The maximum adsorption capacity was 61.57mgPg(-1) according to Langmuir isotherms. These results suggested that EHC was highly effective in P adsorption in a wide range of pH and the presence of competing anions, thus EHC could be a promising adsorbent for phosphorus removal/recovery from wastewater. PMID:24727355

Dai, Lichun; Wu, Bo; Tan, Furong; He, Mingxiong; Wang, Wenguo; Qin, Han; Tang, Xiaoyu; Zhu, Qili; Pan, Ke; Hu, Qichun

2014-06-01

272

Thermionic Topping of a Solar Power Plant Using Converters Containing Lanthanum Hexaboride Electrodes.  

National Technical Information Service (NTIS)

Properties of lanthanum boride for use as a thermionic emitter in a thermionic converter were studied, and results are presented and discussed. The vaporization rate of atoms from lanthanum borode, the work function, and the effect of cesium on these two ...

E. Storms

1978-01-01

273

Lanthanum hexaaluminate novel thermal barrier coatings for gas turbine applications materials and process development  

Microsoft Academic Search

Lanthanum hexaaluminate (LHA) with a magnetoplumbite structure is a promising competitor to yttria partially stabilized zirconia (Y-PSZ) as a thermal barrier coating (TBC), since most zirconia coatings age significantly, including undesired densification at temperatures exceeding 1100 C. The microstructure of calcined lanthanum hexaaluminate powders and thermally sprayed coatings show a platelet structure. The magnetoplumbite structure is characterized by the highly

R. Gadow; M. Lischka

2002-01-01

274

Magnetic properties of lanthanum manganite with monoclinic and cubic perovskite structure  

Microsoft Academic Search

The properties of lanthanum manganite with monoclinic perovskite structure, synthesized under various technological regimes, were investigated by magnetic and neutron-diffraction methods. It is shown that the magnetic properties of lanthanum manganite correlate with its crystal structure, and particularly with the degree of monoclinic distortions of the perovskite lattice.

N. N. Sirota; V. I. Pavlov; E. S. Lashkov; A. P. Karavai

1977-01-01

275

Integrin-associated CD151 drives ErbB2-evoked mammary tumor onset and metastasis.  

PubMed

ErbB2+ human breast cancer is a major clinical problem. Prior results have suggested that tetraspanin CD151 might contribute to ErbB2-driven breast cancer growth, survival, and metastasis. In other cancer types, CD151 sometimes supports tumor growth and metastasis. However, a definitive test of CD151 effects on de novo breast cancer initiation, growth, and metastasis has not previously been done. We used CD151 gene-deleted mice expressing the MMTV-ErbB2 transgene to show that CD151 strongly supports ErbB2+ mammary tumor initiation and metastasis. Delayed tumor onset (by 70-100 days) in the absence of CD151 was accompanied by reduced survival of mammary epithelial cells and impaired activation of FAK- and MAPK-dependent pathways. Both primary tumors and metastatic nodules showed smooth, regular borders, consistent with a less invasive phenotype. Furthermore, consistent with impaired oncogenesis and decreased metastasis, CD151-targeted MCF-10A/ErbB2 cells showed substantial decreases in three-dimensional colony formation, EGF-stimulated tumor cell motility, invasion, and transendothelial migration. These CD151-dependent functions were largely mediated through ?6?4 integrin. Moreover, CD151 ablation substantially prevented PKC- and EGFR/ERK-dependent ?6?4 integrin phosphorylation, consistent with retention of epithelial cell polarity and intermediate filament cytoskeletal connections, which helps to explain diminished metastasis. Finally, clinical data analyses revealed a strong correlation between CD151 and ErbB2 expression and metastasis-free survival of breast cancer patients. In conclusion, we provide strong evidence that CD151 collaborates with LB integrins (particularly ?6?4 and ErbB2 (and EGFR) receptors to regulate multiple signaling pathways, thereby driving mammary tumor onset, survival, and metastasis. Consequently, CD151 is a useful therapeutic target in malignant ErbB2+ breast cancer. PMID:22952421

Deng, Xinyu; Li, Qinglin; Hoff, John; Novak, Marian; Yang, Helen; Jin, Hongyan; Erfani, Sonia F; Sharma, Chandan; Zhou, Pengcheng; Rabinovitz, Isaac; Sonnenberg, Arnoud; Yi, Yajun; Zhou, Peter; Stipp, Christopher S; Kaetzel, David M; Hemler, Martin E; Yang, Xiuwei H

2012-08-01

276

Spectroscopic valence of cerium in cerium-lanthanum-iron compounds  

SciTech Connect

In Ce{sub 2}Fe{sub 14}B and Ce{sub 2}Fe{sub 17}, cerium is mixed valent and nonmagnetic. Any structural or compositional modification of these intermetallics which induces cerium to become trivalent and develop a local 4f moment should result in compounds with enhanced magnetostrictions, magnetocrystalline anisotropies, and net magnetic moments. Due to the dependence of cerium valence on steric volume, one approach for manipulating the valence is to increase the cell volume of these phases by forming pseudoternaries or pseudobinaries of these compounds with lanthanum. In this work, we report the spectroscopic valence of cerium obtained from the cerium L{sub 3} edge of La{sub 2{minus}x}Ce{sub x}Fe{sub 14}B, La{sub 2{minus}x}Ce{sub x}Fe{sub 17}, and selected hydrides and nitrides of these intermetallics. In La{sub 2{minus}x}Ce{sub x}Fe{sub 14}B the average cerium valence is found to decrease only slightly with increasing lanthanum content. Analysis of the extended x-ray absorption fine structure of the cerium and lanthanum L{sub 3} edges from the La{sub 2{minus}x}Ce{sub x}Fe{sub 14}B series is only consistent with cerium preferentially occupying the small 4f rare-earth site in the tetragonal Nd{sub 2}Fe{sub 14}B structure. In La{sub 2{minus}x}Ce{sub x}Fe{sub 17} the shift of cerium towards the trivalent state with decreasing x is more pronounced, but the shift is incomplete over the range of compositions investigated (x{ge}1). Although these results do not exclude the possibility of trivalent cerium in some of these compounds, none of the compounds provided unambiguous evidence of trivalent cerium. {copyright} {ital 1997} {ital The American Physical Society}

Capehart, T.W.; Mishra, R.K.; Fuerst, C.D.; Meisner, G.P.; Pinkerton, F.E.; Herbst, J.F. [Physics Department, General Motors Research Development Center, 30500 Mound Road, Warren, Michigan 48090-9055 (United States)] [Physics Department, General Motors Research Development Center, 30500 Mound Road, Warren, Michigan 48090-9055 (United States)

1997-05-01

277

Expansion on reduction of calcium doped lanthanum chromite  

SciTech Connect

Doped lanthanum chromites have been considered as interconnect materials for the solid oxide fuel cell (SOFC) because of their favorable chemical and electrical properties under both oxidizing and reducing environments. Several investigators have studied the materials properties of the doped lanthanum chromites to optimize their overall performance as an interconnect material. These properties include electrical conductivity, thermal expansion, sinterability, and chemical compatibility with other cell components. These properties are optimized by the amount of dopants substituted into chromite which are usually Ca or Sr. Figure 1 shows the range of values for these properties. Another important characteristic becoming more of a concern as investigators are building SOFC stacks is that doped lanthanum chromite expands when reduced in a low oxygen partial pressure (pO{sub 2}) (<10{sup -12} atm). Plates used to separate oxidizing and fuel gases can deform because of the pO{sub 2} gradient across the interconnect material. This presentation is a summary of work which will be presented at the Fourth International Symposium on Solid Oxide Fuel Cells. In this article, the possible causes of expansion on reduction of the interconnect will be discussed by using a two-dimensional crystal model. The biaxial strain of the stack is calculated under the assumption that the cell components are forced to remain planar. From this, the maximum stress buildup in the interconnect and electrolyte is estimated. In addition, the effects of thermal expansion mismatch and expansion on reduction of the interconnect are compared, and the optimum interconnect composition from a mechanical standpoint is reported.

Carter, J.D.; Hendriksen, P.V.; Mogensen, M. [Riso National Lab., Roskilde (Denmark). Materials Dept.

1995-07-01

278

Syntesis of lanthanum zirconate hydrosols by the ion exchange method  

Microsoft Academic Search

Ion exchange of LaCl3 and ZrOCl2 aqueous solutions with anion-exchanger AV-17-8 was used to synthesize finely dispersed hydrosol of amorphous lanthanum zirconate La2Zr2O7. Heat treatment of dried La2Zr2O7 hydrosols at 700C and 1100C resulted in the formation of powders with fluorite and pyrochlore type structures, respectively. Epitaxial La2Zr2O7 films were obtained on SrTiO3 (001) single crystals. The substrate has an

E. A. Bovina; J. V. Tarasova; F. Kh Chibirova

2011-01-01

279

Lanthanum hexaboride hollow cathode for dense plasma production.  

PubMed

A hollow tube cathode using lanthanum hexaboride as the electron emitter has been designed and constructed. Tests in both argon and hydrogen indicate that this cathode is capable of producing over 800 A of electron current continuously, corresponding to over 25 A/cm(2) from the LaB(6). The cathode has been operated for over 300 h and exposed to air more than 100 times with no deterioration in emission. Projected lifetime is in excess of 3500 h for the sintered LaB(6) piece tested in this configuration. Construction details, performance characteristics, and discussions of space charge limits on emission are described. PMID:18699127

Goebel, D M; Crow, J T; Forrester, A T

1978-04-01

280

Sinterability and electrical conductivity of calcium-doped lanthanum chromites  

Microsoft Academic Search

Calcium-doped lanthanum chromites, (La1-xCax) (Cr1-y Cay O3, have been synthesized to investigate effects of calcium doping on sinterability and electrical conductivity. X-ray diffractometric results have revealed that in addition to normal perovskites (La1-xCaxCrO3), chromium-deficient perovskites can exist as a single phase in the composition region 0.1 x < 0.3, although the deficit of chromium is small. These chromium-deficient perovskites show

N. Sakai; T. Kawada; H. Yokokawa; M. Dokiya; T. Iwata

1990-01-01

281

Selective tetraspan-integrin complexes (CD81/alpha4beta1, CD151/alpha3beta1, CD151/alpha6beta1) under conditions disrupting tetraspan interactions.  

PubMed Central

The tetraspans are molecules with four transmembrane domains which are engaged in multimolecular complexes (the tetraspan web) containing a subset of beta1 integrins (in particular alpha3beta1, alpha4beta1 and alpha6beta1), MHC antigens and several unidentified molecules. The molecules associated with tetraspans are readily detected after immunoprecipitation performed in mild detergents such as Brij 97 or CHAPS. In this study we show that another classical mild detergent, digitonin, dissociated most of these associated molecules, including integrins, from the tetraspans CD9, CD37, CD53, CD63, CD82, Co-029, Talla-1 and NAG-2. In contrast, reciprocal immunoprecipitations from various cell lines demonstrated that two other tetraspans, CD81 and CD151, formed complexes with integrins not disrupted by digitonin. These complexes were CD81/alpha4beta1, CD151/alpha3beta1 and CD151/alpha6beta1. Furthermore, a new anti-CD151 monoclonal antibody (mAb), TS151r, was shown to have a restricted pattern of expression, inversely related to the sum of the levels of expression of alpha6beta1 and alpha3beta1. This mAb was unable to co-precipitate integrins in digitonin, suggesting that its epitope is blocked by the association with integrins. Indeed, the binding of TS151r to the cell surface was quantitatively diminished following alpha3beta1 overexpression. Altogether, these data suggest that, among tetraspans, CD81 interacts directly with the integrin alpha4beta1, and CD151 interacts directly with integrins alpha3beta1 and alpha6beta1. Because all tetraspan-tetraspan associations are disrupted by digitonin, it is likely that the other tetraspans interact indirectly with integrins, through interactions with CD81 or CD151.

Serru, V; Le Naour, F; Billard, M; Azorsa, D O; Lanza, F; Boucheix, C; Rubinstein, E

1999-01-01

282

The evolution mechanism of the dislocation loops in irradiated lanthanum doped cerium oxide  

NASA Astrophysics Data System (ADS)

Cerium dioxide, a non-radioactive surrogate of uranium dioxide, is useful for simulating the radiation responses of uranium dioxide and mixed oxide fuel (MOX). Controlled additions of lanthanum can also be used to form various levels of lattice oxide or anion vacancies. In previous transmission electron microscopy (TEM) experimental studies, the growth rate of dislocation loops in irradiated lanthanum doped ceria was reported to vary with lanthanum concentration. This work reports findings of the evolution mechanisms of the dislocation loops in cerium oxide with and without lanthanum dopants based on a combination of molecular statics and molecular dynamics simulations. These dislocation loops are found to be b=1/3<111> interstitial type Frank loops. Calculations of the defect energy profiles of the dislocation loops with different structural configurations and radii reveal the basis for preference of nucleation as well as the driving force of growth. Frenkel pair evolution simulations and displacement cascade overlaps simulations were conducted for a variety of lanthanum doping conditions. The nucleation and growth processes of the Frank loop were found to be controlled by the mobility of cation interstitials, which is significantly influenced by the lanthanum doping concentration. Competition mechanisms coupled with the mobility of cation point defects were discovered, and can be used to explain the lanthanum effects observed in experiments.

Miao, Yinbin; Aidhy, Dilpuneet; Chen, Wei-Ying; Mo, Kun; Oaks, Aaron; Wolf, Dieter; Stubbins, James F.

2014-02-01

283

Novel borothermal route for the synthesis of lanthanum cerium hexaborides and their field emission properties  

SciTech Connect

The present study describes the development of a simple approach to stabilize polycrystalline lanthanum cerium hexaborides without using any flux and at ambient pressure. The nanostructured lanthanum-cerium borides were synthesized using hydroxide precursors. These precursors (La{sub 1-x}Ce{sub x}(OH){sub 3}, x=0.1, 0.2, 0.3 and 0.5) were synthesized via hydrothermal route in the presence of Tergitol (surfactant, nonylphenol ethoxylate) as a capping agent. The precursors on heating with boron at 1300 Degree-Sign C lead to the formation of nanostructures (cubes, rods and pyramids) of lanthanum cerium hexaboride. We have investigated the field emission behaviour of the hexaboride films fabricated by spin coating. It was observed that the pyramidal shaped nanostructures of La{sub 0.5}Ce{sub 0.5}B{sub 6} shows excellent field emission characteristics with high field enhancement factor of 4502. - Graphical abstract: Nanostructured lanthanum cerium hexaboride with efficient field emission have fabricated by low temperature hydroxide precursor mediated route. Highlights: Black-Right-Pointing-Pointer New methodology to prepare lanthanum cerium hexaboride at 1300 Degree-Sign C via borothermal route. Black-Right-Pointing-Pointer Nanostructured lanthanum cerium hexaboride film by spin coating process. Black-Right-Pointing-Pointer Nanopyramids based lanthanum cerium hexaboride shows excellent field emission.

Menaka [Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi-110016 (India)] [Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi-110016 (India); Patra, Rajkumar; Ghosh, Santanu [Department of Physics, Indian Institute of Technology, Hauz Khas, New Delhi-110016 (India)] [Department of Physics, Indian Institute of Technology, Hauz Khas, New Delhi-110016 (India); Ganguli, Ashok K., E-mail: ashok@chemistry.iitd.ac.in [Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi-110016 (India)

2012-10-15

284

Snow Supporting Structures for Avalanche Hazard Reduction, 151 Avalanche, Highway US 89/191, Jackson, Wyoming.  

National Technical Information Service (NTIS)

The 151 Avalanche, near Jackson, Wyoming has, historically, avalanched to the road below 1.5 to 2 times a year. The road, US 89/191 is four lanes and carries an estimated 8,000 vehicles per day in the winter months. The starting zone of the 151 Avalanche ...

J. Hewes P. Wood R. Decker S. Merry

2009-01-01

285

The Tetraspanin CD151 Is Required for Met-dependent Signaling and Tumor Cell Growth*  

PubMed Central

CD151, a transmembrane protein of the tetraspanin family, is implicated in the regulation of cell-substrate adhesion and cell migration through physical and functional interactions with integrin receptors. In contrast, little is known about the potential role of CD151 in controlling cell proliferation and survival. We have previously shown that ?4 integrin, a major CD151 partner, not only acts as an adhesive receptor for laminins but also as an intracellular signaling platform promoting cell proliferation and invasive growth upon interaction with Met, the tyrosine kinase receptor for hepatocyte growth factor (HGF). Here we show that RNAi-mediated silencing of CD151 expression in cancer cells impairs HGF-driven proliferation, anchorage-independent growth, protection from anoikis, and tumor progression in xenograft models in vivo. Mechanistically, we found that CD151 is crucially implicated in the formation of signaling complexes between Met and ?4 integrin, a known amplifier of HGF-induced tumor cell growth and survival. CD151 depletion hampered HGF-induced phosphorylation of ?4 integrin and the ensuing Grb2-Gab1 association, a signaling pathway leading to MAPK stimulation and cell growth. Accordingly, CD151 knockdown reduced HGF-triggered activation of MAPK but not AKT signaling cascade. These results indicate that CD151 controls Met-dependent neoplastic growth by enhancing receptor signaling through ?4 integrin-mediated pathways, independent of cell-substrate adhesion.

Franco, Melanie; Muratori, Claudia; Corso, Simona; Tenaglia, Enrico; Bertotti, Andrea; Capparuccia, Lorena; Trusolino, Livio; Comoglio, Paolo M.; Tamagnone, Luca

2010-01-01

286

46 CFR 151.50-79 - Methyl acetylene-propadiene mixture.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 2009-10-01 false Methyl acetylene-propadiene mixture. 151.50-79...Requirements § 151.50-79 Methyl acetylene-propadiene mixture. (a) The composition of the methyl acetylene-propadiene mixture at loading...

2009-10-01

287

46 CFR 151.50-79 - Methyl acetylene-propadiene mixture.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Methyl acetylene-propadiene mixture. 151.50-79...Requirements § 151.50-79 Methyl acetylene-propadiene mixture. (a) The composition of the methyl acetylene-propadiene mixture at loading...

2010-10-01

288

33 CFR 151.53 - Special areas for Annex V of MARPOL 73/78.  

Code of Federal Regulations, 2013 CFR

...purposes of §§ 151.51 through 151.77, the special areas are the Mediterranean Sea area, the Baltic Sea area, the Black Sea area, the Red Sea area, the Gulfs area, the North Sea area, the Antarctic area, and the Wider Caribbean...

2013-07-01

289

33 CFR 151.21 - Ships of countries not party to MARPOL 73/78.  

Code of Federal Regulations, 2011 CFR

... 2 2011-07-01 2011-07-01 false Ships of countries not party to MARPOL 73/78. 151...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution 151.21 Ships of countries not party to MARPOL 73/78....

2011-07-01

290

33 CFR 151.21 - Ships of countries not party to MARPOL 73/78.  

Code of Federal Regulations, 2012 CFR

... 2 2012-07-01 2012-07-01 false Ships of countries not party to MARPOL 73/78. 151...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution 151.21 Ships of countries not party to MARPOL 73/78....

2012-07-01

291

33 CFR 151.21 - Ships of countries not party to MARPOL 73/78.  

Code of Federal Regulations, 2010 CFR

... 2 2010-07-01 2010-07-01 false Ships of countries not party to MARPOL 73/78. 151...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution 151.21 Ships of countries not party to MARPOL 73/78....

2010-07-01

292

33 CFR 151.21 - Ships of countries not party to MARPOL 73/78.  

Code of Federal Regulations, 2013 CFR

... 2 2013-07-01 2013-07-01 false Ships of countries not party to MARPOL 73/78. 151...Antarctic Treaty as it Pertains to Pollution from Ships Oil Pollution § 151.21 Ships of countries not party to MARPOL 73/78....

2013-07-01

293

Tetraspanin CD151 regulates alpha6beta1 integrin adhesion strengthening  

NASA Technical Reports Server (NTRS)

The tetraspanin CD151 molecule associates specifically with laminin-binding integrins, including alpha6beta1. To probe strength of alpha6beta1-dependent adhesion to laminin-1, defined forces (0-1.5 nN) were applied to magnetic laminin-coated microbeads bound to NIH 3T3 cells. For NIH 3T3 cells bearing wild-type CD151, adhesion strengthening was observed, as bead detachment became more difficult over time. In contrast, mutant CD151 (with the C-terminal region replaced) showed impaired adhesion strengthening. Static cell adhesion to laminin-1, and detachment of beads coated with fibronectin or anti-alpha6 antibody were all unaffected by CD151 mutation. Hence, CD151 plays a key role in selectively strengthening alpha6beta1 integrin-mediated adhesion to laminin-1.

Lammerding, Jan; Kazarov, Alexander R.; Huang, Hayden; Lee, Richard T.; Hemler, Martin E.

2003-01-01

294

Genistein Suppresses Prostate Cancer Growth through Inhibition of Oncogenic MicroRNA-151  

PubMed Central

Genistein has been shown to suppress the growth of several cancers through modulation of various pathways. However, the effects of genistein on the regulation of oncogenic microRNA-151 (miR-151) have not been reported. In this study, we investigated whether genistein could alter the expression of oncogenic miR-151 and its target genes that are involved in the progression and metastasis of prostate cancer (PCa). Real-time RT-PCR showed that the expression of miR-151 was higher in PC3 and DU145 cells compared with RWPE-1 cells. Treatment of PC3 and DU145 cells with 25 M genistein down-regulated the expression of miR-151 compared with vehicle control. Inhibition of miR-151 in PCa cells by genistein significantly inhibited cell migration and invasion. In-silico analysis showed that several genes (CASZ1, IL1RAPL1, SOX17, N4BP1 and ARHGDIA) suggested to have tumor suppressive functions were target genes of miR-151. Luciferase reporter assays indicated that miR-151 directly binds to specific sites on the 3?UTR of target genes. Quantitative real-time PCR analysis showed that the mRNA expression levels of the five target genes in PC3 and DU145 were markedly changed with miR-151 mimics and inhibitor. Kaplan-Meier curves and log-rank tests revealed that high expression levels of miR-151 had an adverse effect on survival rate. This study suggests that genistein mediated suppression of oncogenic miRNAs can be an important dietary therapeutic strategy for the treatment of PCa.

Chiyomaru, Takeshi; Yamamura, Soichiro; Zaman, Mohd Saif; Majid, Shahana; Deng, Guoren; Shahryari, Varahram; Saini, Sharanjot; Hirata, Hiroshi; Ueno, Koji; Chang, Inik; Tanaka, Yuichiro; Tabatabai, Z. Laura; Enokida, Hideki; Nakagawa, Masayuki; Dahiya, Rajvir

2012-01-01

295

Genistein suppresses prostate cancer growth through inhibition of oncogenic microRNA-151.  

PubMed

Genistein has been shown to suppress the growth of several cancers through modulation of various pathways. However, the effects of genistein on the regulation of oncogenic microRNA-151 (miR-151) have not been reported. In this study, we investigated whether genistein could alter the expression of oncogenic miR-151 and its target genes that are involved in the progression and metastasis of prostate cancer (PCa). Real-time RT-PCR showed that the expression of miR-151 was higher in PC3 and DU145 cells compared with RWPE-1 cells. Treatment of PC3 and DU145 cells with 25 M genistein down-regulated the expression of miR-151 compared with vehicle control. Inhibition of miR-151 in PCa cells by genistein significantly inhibited cell migration and invasion. In-silico analysis showed that several genes (CASZ1, IL1RAPL1, SOX17, N4BP1 and ARHGDIA) suggested to have tumor suppressive functions were target genes of miR-151. Luciferase reporter assays indicated that miR-151 directly binds to specific sites on the 3'UTR of target genes. Quantitative real-time PCR analysis showed that the mRNA expression levels of the five target genes in PC3 and DU145 were markedly changed with miR-151 mimics and inhibitor. Kaplan-Meier curves and log-rank tests revealed that high expression levels of miR-151 had an adverse effect on survival rate. This study suggests that genistein mediated suppression of oncogenic miRNAs can be an important dietary therapeutic strategy for the treatment of PCa. PMID:22928040

Chiyomaru, Takeshi; Yamamura, Soichiro; Zaman, Mohd Saif; Majid, Shahana; Deng, Guoren; Shahryari, Varahram; Saini, Sharanjot; Hirata, Hiroshi; Ueno, Koji; Chang, Inik; Tanaka, Yuichiro; Tabatabai, Z Laura; Enokida, Hideki; Nakagawa, Masayuki; Dahiya, Rajvir

2012-01-01

296

Morphology-controlled nonaqueous synthesis of anisotropic lanthanum hydroxide nanoparticles  

SciTech Connect

The preparation of lanthanum hydroxide and manganese oxide nanoparticles is presented, based on a nonaqueous sol-gel process involving the reaction of La(OiPr){sub 3} and KMnO{sub 4} with organic solvents such as benzyl alcohol, 2-butanone and a 1:1 vol. mixture thereof. The lanthanum manganese oxide system is highly complex and surprising results with respect to product composition and morphology were obtained. In dependence of the reaction parameters, the La(OH){sub 3} nanoparticles undergo a shape transformation from short nanorods with an average aspect ratio of 2.1 to micron-sized nanofibers (average aspect ratio is more than 59.5). Although not directly involved, KMnO{sub 4} plays a crucial role in determining the particle morphology of La(OH){sub 3}. The reason lies in the fact that KMnO{sub 4} is able to oxidize the benzyl alcohol to benzoic acid, which presumably induces the anisotropic particle growth in [0 0 1] direction upon preferential coordination to the {+-}(1 0 0), {+-}(0 1 0) and {+-}(-110) crystal facets. By adjusting the molar La(OiPr){sub 3}-to-KMnO{sub 4} ratio as well as by using the appropriate solvent mixture it is possible to tailor the morphology, phase purity and microstructure of the La(OH){sub 3} nanoparticles. Postsynthetic thermal treatment of the sample containing La(OH){sub 3} nanofibers and {beta}-MnOOH nanoparticles at the temperature of 800 deg. C for 8 h yielded polyhedral LaMnO{sub 3} and worm-like La{sub 2}O{sub 3} nanoparticles as final products. - Graphical abstract: Lanthanum hydroxide nanoparticles are synthesized based on a nonaqueous sol-gel process involving the reaction of La(OiPr){sub 3} and KMnO{sub 4} with organic solvents such as benzyl alcohol, 2-butanone and a 1:1 vol. mixture thereof. In dependence of the reaction parameters, the La(OH){sub 3} nanoparticles undergo a shape transformation from short nanorods to micron-sized nanofibers.

Djerdj, Igor [ETH Zuerich, Department of Materials, Wolfgang-Pauli-Strasse 10, 8093 Zurich (Switzerland); Department of Physics, Faculty of Science, University of Zagreb, Bijenicka 32, P.O. Box 331, 10002 Zagreb (Croatia); Garnweitner, Georg [Max Planck Institute of Colloids and Interfaces, Research Campus Golm, D-14424 Potsdam (Germany); Sheng Su, Dang [Department of Inorganic Chemistry, Fritz-Haber-Institute of the Max-Planck-Society, Faradayweg 4-6, D-14195 Berlin (Germany); Niederberger, Markus [ETH Zuerich, Department of Materials, Wolfgang-Pauli-Strasse 10, 8093 Zurich (Switzerland)], E-mail: markus.niederberger@mat.ethz.ch

2007-07-15

297

34 CFR 403.151 - How must funds be used under the Consumer and Homemaking Education Programs?  

Code of Federal Regulations, 2013 CFR

34 Education 3 2013-07-01 2013-07-01 false How must funds be used under the Consumer and Homemaking Education Programs? 403.151 Section 403.151 Education Regulations of the Offices of the Department...

2013-07-01

298

Develop Techniques for Ion Implantation of PLZT (Lead-Lanthanum-Zirconate-Titanate) for Adaptive Optics.  

National Technical Information Service (NTIS)

Research was conducted at Pacific Northwest Laboratory to develop high photosensitivity adaptive optical elements utilizing ion implanted lanthanum-doped lead-zirconate-titanate (PLZT). One centimeter square samples were prepared by implanting ferroelectr...

C. R. Batishko J. L. Brimhall W. T. Pawlewicz K. A. Stahl L. H. Toburen

1987-01-01

299

Modification of the Sulfur Dioxide-Iodine Thermochemical Hydrogen Cycle with Lanthanum Sulfites and Sulfates.  

National Technical Information Service (NTIS)

Variable composition, insoluble dilanthanum oxide-sulfite-sulfate-hydrates were prepared by reaction of lanthanum dioxymonosulfate with aqueous sulfur dioxide. These compositions reacted with iodine to yield sulfate in the solid phase, and hydrogen iodide...

E. I. Onstott M. G. Bowman M. F. Michnovicz C. M. Hollabaugh

1984-01-01

300

Sertoli-sertoli junctions and Sertoli-spermatid junctions after efferent ductule ligation and lanthanum treatment.  

PubMed

Seminiferous tubules, partially dilated by ligation of the efferent ductules, were examined after treatment with lanthanum. Lanthanum penetrated the intercellular spaces of the seminiferous epithelium, but only to the level of the Sertoli-Sertoli junctions. Further penetration from the interstitial surface of the tubule was restricted by membrane fusions (tight junctions) at the junctional complex. Lanthanum also penetrated the epithelium from the luminal surface permeating the adluminal intercellular spaces, including the site of the Sertoli-spermatid junction. The lanthanum occupying the Sertoli-spermatid junctional site appeared as a slightly narrower electron-opaque zone than that found in the non-specialized intercellular areas. The findings clearly reveal that only the Sertoli-Sertoli junctional site forms a restrictive barrier. In contrast to the specializations of plasma membrane which form the tight junction, the associated filaments and cisterna of endoplasmic reticulum may be components more directly related to maintaining and regulating cell adhesion. PMID:842475

Ross, M H

1977-01-01

301

METAL INTERACTIONS AT SULFIDE MINERAL SURFACES. PART 2. ADSORPTION AND DESORPTION OF LANTHANUM  

EPA Science Inventory

Batch-type adsorption experiments with four sulfide minerals (chalcocite, galena, pyrite, and sphalerite) were used to investigate the adsorption and desorption behavior of lanthanum (III) in the presence of ethylenediaminetetraacetic acid (EDTA), a model humic substance. Linear ...

302

Studies on combustion catalytic activity of some pure and doped lanthanum cobaltites  

Microsoft Academic Search

The aim of this work is to compare the catalytic activity of some pure and doped lanthanum cobaltites, prepared by solution combustion technique, with a Pt\\/Al2O3 commercial catalyst. As test reaction we used the combustion of lean methane mixtures. The experimental data evidenced a significantly better catalytic activity of a cerium-doped lanthanum cobaltite, prepared by using ?-alanine as fuel. The

Magdalena Bosomoiu; Grigore Bozga; Daniela Berger; Cristian Matei

2008-01-01

303

Self-Correction of Lanthanum-Cerium Halide Gamma Spectra (pre-print)  

Microsoft Academic Search

Lanthanum-cerium halide detectors generally exhibit superior energy resolutions for gamma radiation detection compared with conventional sodium iodide detectors. However, they are also subject to self-activities due to lanthanum-138 decay and contamination due to beta decay in the low-energy region and alpha decay in the high-energy region. The detectors self-activity and crystal contamination jointly contribute a significant amount of uncertainties to

Ding Yuan; Paul Guss; Sanjoy Mukhopadhyay

2009-01-01

304

B-site substituted lanthanum strontium ferrites as electrode materials for electrochemical applications  

Microsoft Academic Search

For electrochemical systems such as solid oxide fuel cells (SOFCs) or solid oxide electrolyzer cells (SOECs), perovskites are widely used as cathode material for the reduction of molecular oxygen. At present, strontium-substituted lanthanum manganite, La 1-x Sr x MnO 3-? (LSM), is used as standard SOFC cathode material for operation at high temperatures, whereas strontium-substituted lanthanum ferrite (LSF) is alternatively

Ulrich F. Vogt; Josef Sfeir; Joerg Richter; Christian Soltmann; Peter Holtappels

2008-01-01

305

Lanthanum-molybdenum multilayer mirrors for attosecond pulses between 80 and 130 eV  

Microsoft Academic Search

A novel multilayer material system consisting of lanthanum and molybdenum nano-layers for both broadband and highly reflecting multilayer mirrors in the energy range between 80 and 130 eV is presented. The simulation and design of these multilayers were based on an improved set of optical constants, which were recorded by extreme ultraviolet (XUV)\\/soft-x-ray absorption measurements on freestanding lanthanum nano-films between

M. Hofstetter; A. Aquila; M. Schultze; A. Guggenmos; S. Yang; E. Gullikson; M. Huth; B. Nickel; J. Gagnon; V. S. Yakovlev; E. Goulielmakis; F. Krausz; U. Kleineberg

2011-01-01

306

Liquid-phase-assisted sintering of calcium-doped lanthanum chromites  

Microsoft Academic Search

Investigations have been made on the low-temperature sinterability of calcium-doped lanthanum chromites which are to be used as interconnectors in solid oxide fuel cells (SOFCs). Nominally chromium deficient lanthanum calcium chromites (La[sub 0.7]Ca[sub 0.3]Cr[sub 1[minus]y]O[sub 3], y = 0.02) were found to be sinterable to 94% theoretical density at 1573 K in air, whereas no densification was observed for samples

Natsuko Sakai; Tatsuya Kawada; Harumi Yokokawa; Masayuki Dokiya; Isao Kojima

1993-01-01

307

High-Resolution Room Temperature Spectroscopy with Lanthanum Halides  

SciTech Connect

The most desirable features in a spectroscopic material are high sensitivity and high resolution. Cerium-activated crystals of lanthanum bromide (LaBr{sub 3}:Ce) have higher sensitivity and better spectroscopic resolution than sodium/cesium iodide (NaI/CsI) crystals because of higher density (5.29 g/cm{sup 3}), faster decay time (35 ns), minimal afterglow, and larger (63 000 photons/MeV) and more linear light output (6% nonlinearity over the energy range between 60 and 1332 keV). Of all the recent scintillator materials manufactured to date, LaBr{sub 3}, with cerium activators, is one of the most promising for high-resolution, fast timing techniques as applied to medical image reconstructions or associated particle imaging.

Mukhopadhyay, Sanjoy [Bechtel Nevada (United States)

2005-11-15

308

Cobalt doped lanthanum chromite material suitable for high temperature use  

DOEpatents

A high temperature, solid electrolyte electrochemical cell, subject to thermal cycling temperatures of between about 25.degree. C. and about 1200.degree. C., capable of electronic interconnection to at least one other electrochemical cell and capable of operating in an environment containing oxygen and a fuel, is made; where the cell has a first and second electrode with solid electrolyte between them, where an improved interconnect material is applied along a portion of a supporting electrode; where the interconnect is made of a chemically modified lanthanum chromite, containing cobalt as the important additive, which interconnect allows for adjustment of the thermal expansion of the interconnect material to more nearly match that of other cell components, such as zirconia electrolyte, and is stable in oxygen containing atmospheres such as air and in fuel environments.

Ruka, Roswell J. (Churchill, PA)

1986-01-01

309

Field emission characteristics of lanthanum hexaboride coated silicon field emitters  

NASA Astrophysics Data System (ADS)

Lanthanum hexaboride(LaB6) films have been deposited on silicon tip field emitters by electron-beam evaporation. The field emission characteristics are studied in a diode test cell in a vacuum system. The experimental results show that the field emission stability of the LaB6-coated Si-tip FEA can be improved and the emission current is significantly enhanced to 75 A, in contrast to pure Si-tip FEA of 500 nA and Mo-coated Si-tip FEA of 300 nA with 1500 V applied to the anode. Furthermore, even at low vacuum (>1.5 10-5 Torr) it still exhibits good emission properties and strong ability to withstand ion bombardment. This LaB6-coated Si-tip FEA is an excellent electronic candidate, in particular a fit for travelling-wave tubes, klystrons and other large vacuum apparatus.

Wang, Xiaoju; Lin, Zulun; Qi, Kangcheng; Chen, Zexiang; Wang, Zhigang; Jiang, Yadong

2007-08-01

310

Timing resolution measurements of a 3 in. lanthanum bromide detector  

NASA Astrophysics Data System (ADS)

Cerium-doped lanthanum bromide (LaBr3:Ce) is a scintillator that presents very good energy and timing resolutions and it is a perfect candidate for photon detector in future experiments to search for lepton flavor violation as in ??e? or ??e conversion. While energy resolution was thoroughly investigated, timing resolution at several MeV presents some experimental challenge. We measured the timing resolution of a 3 in.3 in. cylindrical LaBr3(Ce) crystal versus few reference detectors by means of a nuclear reaction from a Cockcroft-Walton accelerator that produces coincident ?-rays in the 4.4-11.6 MeV range. Preliminary results allow us to extrapolate the properties of a segmented ?-ray detector in the 50-100 MeV range.

Galli, L.; De Gerone, M.; Dussoni, S.; Nicol, D.; Papa, A.; Tenchini, F.; Signorelli, G.

2013-08-01

311

Synthesis and characterization of strontium-lanthanum apatites  

SciTech Connect

Two series of strontium-lanthanum apatites, Sr{sub 10-x}La {sub x}(PO{sub 4}){sub 6-x}(SiO{sub 4}) {sub x}F{sub 2} and Sr{sub 10-x}La {sub x}(PO{sub 4}){sub 6-x}(SiO{sub 4}) {sub x}O with 0 {<=} x {<=} 6, were synthesized by solid state reaction in the temperature range of 1200-1400 deg. C. The obtained materials were characterized by powder X-ray diffraction, infrared absorption spectroscopy and solid {sup 31}P Nuclear Magnetic Resonance. Pure solid solutions were obtained within a limited range of unsubstituted phosphate and silicate apatites. A variation of the lattice parameters was observed, with an increase of a and a decrease of c parameters, related to the radius of the corresponding substituted ions.

Boughzala, K. [U.R. Materiaux Inorganiques, Departement de Chimie, Faculte des Sciences, 5000 Monastir (Tunisia); Salem, E. Ben [U.R. Materiaux Inorganiques, Departement de Chimie, Faculte des Sciences, 5000 Monastir (Tunisia); Chrifa, A. Ben [Laboratoire de Thermodynamique Appliquee, Departement de Chimie, Faculte des Sciences de Tunis, Campus Universitaire, 1060 Tunis (Tunisia); Gaudin, E. [Institut de Chimie de la Matiere Condensee, Universite de Bordeaux, CNRS (UPR9048) 87 Avenue du Dr Schweitzer, 33608 Pessac Cedex (France); Bouzouita, K. [U.R. Materiaux Inorganiques, Departement de Chimie, Faculte des Sciences, 5000 Monastir (Tunisia)]. E-mail: khaled.bouzouita@ipeim.rnu.tn

2007-07-03

312

Magneto-transport properties of lanthanum and calcium deficient manganites  

NASA Astrophysics Data System (ADS)

We present a comparative study of the physical properties of the La0.5Ca0.5MnO3, La0.450.05Ca0.5MnO3 and La0.5Ca0.450.05MnO3 powder samples. Our synthesized samples have been elaborated using the conventional solid-state reaction technique they crystallize in the orthorhombic perovskite structure with Pnma space group. Resistivity measurements show that the defect effects in the A site on the electrical properties are substantially different for both lacunar samples. Electrical investigations show a metallic-semiconducting transition when temperature deceases for the calcium-deficient sample, however we observe a semiconducting behavior in the whole temperature range 20-300 K in the lanthanum-deficient one.

Walha, I.; Boujelben, W.; Koubaa, M.; Cheikh-Rouhou, A.; Haghiri-Gosnet, A. M.

2006-09-01

313

Near-electrode processes in lanthanum-gallium tantalate crystals  

SciTech Connect

The near-electrode processes on the surfaces of the polar cuts of lanthanum-gallium tantalate crystals grown in different atmospheres were investigated. The temperature dependences of short-circuit currents in the temperature range 20-700{sup o}C were measured and phase analysis of the sample surfaces after the temperature tests were performed. It is shown that short-circuit currents arise on the surfaces of polar cuts with identical conducting coatings without preliminary polarization. These currents are caused by the generation of intrinsic emf as a result of the electrochemical reactions on opposite polar cut surfaces coming in contact with a conducting coating. It is established that the crystal growth atmosphere and the conducting coating material significantly affect the temperature dependences of short-circuit currents.

Buzanov, O. A. [OAO Fomos Materials (Russian Federation); Zabelina, E. V., E-mail: e.zabelina@gmail.com; Kozlova, N. S., E-mail: kozlova_nina@mail.ru; Sagalova, T. B. [Moscow State Institute of Steel and Alloys (Russian Federation)

2008-09-15

314

25 CFR 151.5 - Trust acquisitions in Oklahoma under section 5 of the I.R.A.  

Code of Federal Regulations, 2011 CFR

... false Trust acquisitions in Oklahoma under section 5 of the I.R.A. 151.5 Section 151.5 Indians BUREAU OF INDIAN...151.5 Trust acquisitions in Oklahoma under section 5 of the I.R.A. In addition to acquisitions for tribes which did...

2011-04-01

315

Tribological behaviors of lanthanum-based phosphonate 3-aminopropyltriethoxysilane self-assembled films  

NASA Astrophysics Data System (ADS)

Lanthanum-based thin films deposited on the phosphonate 3-aminopropyltriethoxysilane (APTES) self-assembled monolayer (SAM) were prepared on the hydroxylated glass substrate by a self-assembling process from specially formulated solution. Chemical compositions of the films and chemical state of the elements were detected by X-ray photoelectron spectrometry (XPS). The thickness of the films was determined with an ellipsometer, while the morphologies of the original and worn surfaces of the samples were analyzed by means of atomic force microscopy (AFM) and scanning electron microscopy (SEM), respectively. The tribological properties of the films sliding against GCr15 steel ball were evaluated on a UMT-2MT reciprocating friction and wear tester. As the results, the target film was obtained and reaction may have taken place between the film and the glass substrate. The tribological results show that lanthanum-based thin films are superior in reducing friction and resisting wear compared with APTES-SAM and phosphorylated APTES-SAM. SEM observation of the morphologies of worn surfaces indicates that the wear of APTES-SAM and the phosphorylated APTES-SAM is characteristic of brittle fracture and severe abrasion. Differently, slight abrasion and micro-crack dominate the wear of lanthanum-based thin films. The superior friction reduction and wear resistance of lanthanum-based thin films are attributed to the enhanced load-carrying capacity of the inorganic lanthanum particles in the lanthanum-based thin films as well as good adhesion of the films to the substrate.

Gu, Qinlin; Cheng, Xianhua

2007-06-01

316

Studies on gel-grown pure and strontium-modified lanthanum tartrate crystals  

NASA Astrophysics Data System (ADS)

Crystals of pure and strontium-modified lanthanum tartrate bearing composition (La) 1-x(Sr) xC 4H 4O 6 nH 2O (where x=0, 0.04, 0.10, 0.15; n=5,5,6,8) were obtained using gel method. The materials were studied using CH analysis, X-ray powder diffraction, FTIR, EDAX and thermoanalytical techniques. X-ray powder diffraction results analyzed by using suitable software suggest that while unmodified lanthanum tartrate has a monoclinic structure with the space group P 21, the entry of strontium into its lattice changes the system to orthorhombic with the space group P 2121. The unit cell volume is observed to decrease with increase in the concentration of strontium in lanthanum tartrate. Thermal analysis suggests that pure lanthanum tartrate starts decomposing at 41.31 C whereas the strontium-modified lanthanum tartrate brings about better thermal stability which increases with an increase in strontium concentration. The percentage weight loss calculations from the thermogram supplemented by EDAX, CH analysis and FTIR spectroscopy suggest that both unmodified and strontium-modified lanthanum tartrate spherulitic crystals contain water of hydration; the amount of water of hydration being different for crystals with different content of strontium.

Firdous, A.; Quasim, I.; Ahmad, M. M.; Kotru, P. N.

2009-07-01

317

The management of hyperphosphatemia by lanthanum carbonate in chronic kidney disease patients  

PubMed Central

Hyperphosphatemia has been shown to be involved not only in the onset and progression of secondary hyperparathyroidism but also in vascular calcification. In addition, it influences the clinical course of patients with chronic kidney disease. Phosphate (Pi) binder is required in the management of hyperparaphosphatemia, because dietary Pi restriction and Pi removal by hemodialysis alone are insufficient. Lanthanum carbonate, a powerful Pi binder, has a similar effect to aluminum hydroxide in reducing serum Pi levels. As it is excreted via the liver, lanthanum carbonate has an advantage in patients with renal failure. The effect of lanthanum carbonate on serum Pi levels is almost two times higher than that of calcium (Ca) carbonate, which is commonly used. Lanthanum carbonate and Ca carbonate have an additive effect. Worldwide, there is 6 years worth of clinical treatment data on lanthanum carbonate; however, we have 3 years of clinical use in Japanese patients with hyperphosphatemia. No serious side effects have been reported. However, the most important concern is bone toxicity, which has been observed with use of aluminum hydroxide. For this study, clinical research involved analysis of bone biopsies. Although osteomalacia is the most noticeable side effect, this was not observed. Both the high- and the low-turnover bone disease concentrated into a normal bone turnover state. However, as the authors have less than 10 years clinical experience with lanthanum carbonate, patients should be monitored carefully. In addition, it is necessary to demonstrate whether potent treatment effects on hyperphosphatemia improve the long-term outcome.

Shigematsu, Takashi; Nakashima, Yuri; Ohya, Masaki; Tatsuta, Koichi; Koreeda, Daisuke; Yoshimoto, Wataru; Yamanaka, Shintaro; Sakaguchi, Toshifumi; Hanba, Yoshiyuki; Mima, Toru; Negi, Shigeo

2012-01-01

318

Beam-hardening artifacts on computed tomography images caused by lanthanum carbonate hydrate in a patient on dialysis  

Microsoft Academic Search

Lanthanum carbonate hydrate is a nonaluminum, noncalcium phosphate binder containing lanthanum (La). It is effective in decreasing\\u000a the serum phosphate level in patients on dialysis. Because the atomic number of the La contained in lanthanum carbonate hydrate\\u000a is relatively high, at 57, this agent may cause strong artifacts on computed tomography (CT) images, which may be mistakenly\\u000a interpreted as foreign

Hiromitsu Hayashi; Minoru Machida; Tetsuro Sekine; Hidenori Yamaguchi; Tomonari Kiriyama; Shin-ichiro Kumita

2010-01-01

319

40 CFR 272.151 - Arizona State-administered program: Final authorization.  

Code of Federal Regulations, 2010 CFR

... 26 2009-07-01 2009-07-01 false Arizona State-administered program: Final authorization...APPROVED STATE HAZARDOUS WASTE MANAGEMENT PROGRAMS Arizona § 272.151 Arizona State-administered program: Final...

2009-07-01

320

40 CFR 272.151 - Arizona State-administered program: Final authorization.  

Code of Federal Regulations, 2010 CFR

... 26 2010-07-01 2010-07-01 false Arizona State-administered program: Final authorization...APPROVED STATE HAZARDOUS WASTE MANAGEMENT PROGRAMS Arizona § 272.151 Arizona State-administered program: Final...

2010-07-01

321

24 CFR 943.151 - What procurement standards apply to a joint venture itself?  

Code of Federal Regulations, 2010 CFR

...INDIAN HOUSING, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT PUBLIC HOUSING AGENCY CONSORTIA AND JOINT VENTURES Subsidiaries, Affiliates, Joint Ventures in Public Housing 943.151 What procurement standards apply to a joint venture...

2010-04-01

322

41 CFR 105-53.151 - Geographic composition, addresses, and telephone numbers.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Geographic composition, addresses...Offices § 105-53.151 Geographic composition, addresses...those jurisdictions within the National Capital Region boundaries...Telephone: 206-931-7000. National Capital Region....

2013-07-01

323

Prostate Cancer Microparticles Expressing CD151 as a Predictive Biomarker for Progression to Metastasis.  

National Technical Information Service (NTIS)

We have found that the monoclonal antibody specific for a specific epitope of CD151 that is hypothesized to be expressed on prostate cancer microparticles from metastatic prostate cancer patients is also expressed on a subpopulation of prostate cancer mic...

H. Leong

2012-01-01

324

14 CFR 151.115 - Advance planning proposals: Cosponsorship and agency.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Advance planning proposals: Cosponsorship and agency...AIRPORTS Rules and Procedures for Advance Planning and Engineering Proposals 151.115 Advance planning proposals: Cosponsorship and...

2010-01-01

325

33 CFR 151.1515 - Ballast water management alternatives under extraordinary conditions.  

Code of Federal Regulations, 2013 CFR

33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Ballast water management alternatives under extraordinary...Section 151.1515 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2013-07-01

326

46 CFR 67.151 - Replacement of Certificate of Documentation; special procedure for wrongfully withheld document.  

Code of Federal Regulations, 2013 CFR

...for Documentation, Exchange or Replacement of Certificate of Documentation, or Return to Documentation; Mortgagee Consent; Validation § 67.151 Replacement of Certificate of Documentation; special procedure for wrongfully withheld document....

2013-10-01

327

32 CFR 1906.151 - Program accessibility: New construction and alterations.  

Code of Federal Regulations, 2013 CFR

...Regulations Relating to National Defense CENTRAL INTELLIGENCE AGENCY ENFORCEMENT OF NONDISCRIMINATION ON THE...IN PROGRAMS OR ACTIVITIES CONDUCTED BY THE CENTRAL INTELLIGENCE AGENCY § 1906.151 Program...

2013-07-01

328

32 CFR 1906.151 - Program accessibility: New construction and alterations.  

Code of Federal Regulations, 2010 CFR

...National Defense CENTRAL INTELLIGENCE AGENCY ENFORCEMENT OF...ACTIVITIES CONDUCTED BY THE CENTRAL INTELLIGENCE AGENCY § 1906.151 Program...construction and alterations. Each building or part of a building that is...

2010-07-01

329

14 CFR 151.13 - Federal-aid Airport Program: Policy affecting landing aid requirements.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Federal-aid Airport Program: Policy affecting landing aid requirements...DEPARTMENT OF TRANSPORTATION (CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS General Requirements § 151.13...

2010-01-01

330

46 CFR 160.151-59 - Operating instructions and information for the ship's training manual.  

Code of Federal Regulations, 2010 CFR

...and information for the ship's training manual. 160.151-59 Section...and information for the ship's training manual. (a) The liferaft manufacturer...information for the ship's training manual available in English to...

2010-10-01

331

9 CFR 381.151 - Adulteration of product by polluted water; procedure for handling.  

Code of Federal Regulations, 2012 CFR

... Adulteration of product by polluted water; procedure for handling. 381.151... Adulteration of product by polluted water; procedure for handling. (a) In the event there is polluted water (including but not limited to...

2014-01-01

332

29 CFR 1990.151 - Model standard pursuant to section 6(b) of the Act.  

Code of Federal Regulations, 2010 CFR

...REGULATION OF POTENTIAL OCCUPATIONAL CARCINOGENS Model Standards § 1990.151 Model standard pursuant to section 6(b) of the Act...and procedures are performed by or under the supervision of a licensed physician, and shall be...

2009-07-01

333

29 CFR 1990.151 - Model standard pursuant to section 6(b) of the Act.  

Code of Federal Regulations, 2010 CFR

...REGULATION OF POTENTIAL OCCUPATIONAL CARCINOGENS Model Standards § 1990.151 Model standard pursuant to section 6(b) of the Act...and procedures are performed by or under the supervision of a licensed physician, and shall be...

2010-07-01

334

45 CFR 1706.151 - Program accessibility: New construction and alterations.  

Code of Federal Regulations, 2013 CFR

...Continued) NATIONAL COMMISSION ON LIBRARIES AND INFORMATION SCIENCE ENFORCEMENT OF NONDISCRIMINATION ON THE BASIS OF HANDICAP...CONDUCTED BY NATIONAL COMMISSION ON LIBRARIES AND INFORMATION SCIENCE § 1706.151 Program accessibility: New construction...

2013-10-01

335

45 CFR 1181.151 - Program accessibility: New construction and alterations.  

Code of Federal Regulations, 2013 CFR

...NATIONAL FOUNDATION ON THE ARTS AND THE HUMANITIES INSTITUTE OF MUSEUM AND LIBRARY SERVICES ENFORCEMENT OF NONDISCRIMINATION ON...HANDICAP IN PROGRAMS OR ACTIVITIES CONDUCTED BY THE INSTITUTE OF MUSEUM AND LIBRARY SERVICES § 1181.151 Program...

2013-10-01

336

33 CFR 151.1518 - Penalties for failure to conduct ballast water management.  

Code of Federal Regulations, 2013 CFR

...COMMERCIAL WASTE, AND BALLAST WATER Ballast Water Management for Control of Nonindigenous Species in the Great Lakes and Hudson River § 151.1518 Penalties for failure to conduct ballast water management. (a) A person who violates...

2013-07-01

337

33 CFR 151.2035 - What are the required ballast water management practices for my vessel?  

Code of Federal Regulations, 2010 CFR

33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false What are the required ballast water management practices for my vessel...151.2035 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2010-07-01

338

33 CFR 151.2035 - What are the required ballast water management practices for my vessel?  

Code of Federal Regulations, 2011 CFR

33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false What are the required ballast water management practices for my vessel...151.2035 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2011-07-01

339

33 CFR 151.1514 - Ballast water management alternatives under extraordinary conditions.  

Code of Federal Regulations, 2011 CFR

33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Ballast water management alternatives under extraordinary...Section 151.1514 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2011-07-01

340

33 CFR 151.1515 - Ballast water management alternatives under extraordinary conditions.  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Ballast water management alternatives under extraordinary...Section 151.1515 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2012-07-01

341

33 CFR 151.1514 - Ballast water management alternatives under extraordinary conditions.  

Code of Federal Regulations, 2010 CFR

33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Ballast water management alternatives under extraordinary...Section 151.1514 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2010-07-01

342

27 CFR 479.151 - Failure to make returns: Substitute returns.  

Code of Federal Regulations, 2011 CFR

...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Examination of Books and Records § 479.151 Failure to make...

2011-04-01

343

19 CFR 151.46 - Allowance for detectable moisture and impurities.  

Code of Federal Regulations, 2013 CFR

...SAMPLING, AND TESTING OF MERCHANDISE Petroleum and Petroleum Products § 151.46 Allowance for detectable moisture...impurities present in or upon imported petroleum or petroleum products shall be made in accordance with § 158.13 of...

2013-04-01

344

46 CFR 160.151-45 - Equipment required for servicing facilities.  

Code of Federal Regulations, 2013 CFR

...annual list issued in accordance with § 160.151-35(b)(2); (d) Hot presses (if applicable); (e) Safety-type glue pots or equivalents; (f) Abrasive devices; (g) A source of clean, dry, pressurized air; hoses; and...

2013-10-01

345

46 CFR 151.50-40 - Additional requirements for carbon disulfide (carbon bisulfide) and ethyl ether.  

Code of Federal Regulations, 2010 CFR

... Additional requirements for carbon disulfide (carbon bisulfide) and ethyl ether...the cargo hose. This electrical bonding shall be maintained until after...requirements of § 151.50-41 for carbon disulfide (carbon bisulfide...

2009-10-01

346

46 CFR 151.50-40 - Additional requirements for carbon disulfide (carbon bisulfide) and ethyl ether.  

Code of Federal Regulations, 2010 CFR

... Additional requirements for carbon disulfide (carbon bisulfide) and ethyl ether...the cargo hose. This electrical bonding shall be maintained until after...requirements of § 151.50-41 for carbon disulfide (carbon bisulfide...

2010-10-01

347

40 CFR 272.151 - Arizona State-administered program: Final authorization.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Arizona State-administered program: Final...PROTECTION AGENCY (CONTINUED) SOLID WASTES (CONTINUED) APPROVED STATE HAZARDOUS WASTE MANAGEMENT PROGRAMS...Arizona § 272.151 Arizona State-administered program:...

2013-07-01

348

33 CFR 151.43 - Control of discharge of NLS residues.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID...to the Antarctic Treaty as it Pertains to Pollution from Ships Noxious Liquid Substance Pollution § 151.43 Control of discharge of...

2013-07-01

349

33 CFR 151.49 - Category C and D Oil-like NLSs allowed for carriage.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID...to the Antarctic Treaty as it Pertains to Pollution from Ships Noxious Liquid Substance Pollution § 151.49 Category C and D...

2013-07-01

350

33 CFR 151.69 - Operating requirements: Discharge of garbage outside special areas.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) POLLUTION VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES...Protection to the Antarctic Treaty as it Pertains to Pollution from Ships Garbage Pollution and Sewage § 151.69 Operating...

2013-07-01

351

DHHC2 Affects Palmitoylation, Stability, and Functions of Tetraspanins CD9 and CD151  

PubMed Central

Although palmitoylation markedly affects tetraspanin protein biochemistry and functions, relevant palmitoylating enzymes were not known. There are 23 mammalian DHHC (Asp-His-His-Cys) proteins, which presumably palmitoylate different sets of protein substrates. Among DHHC proteins tested, DHHC2 best stimulated palmitoylation of tetraspanins CD9 and CD151, whereas inactive DHHC2 (containing DH?AA or C?S mutations within the DHHC motif) failed to promote palmitoylation. Furthermore, DHHC2 associated with CD9 and CD151, but not other cell surface proteins, and DHHC2 knockdown diminished CD9 and CD151 palmitoylation. Knockdown of six other Golgi-resident DHHC proteins (DHHC3, -4, -8, -17, -18, and -21) had no effect on CD9 or CD151. DHHC2 selectively affected tetraspanin palmitoylation, but not the palmitoylations of integrin ?4 subunit and bulk proteins visible in [3H]palmitate-labeled whole cell lysates. DHHC2-dependent palmitoylation also had multiple functional effects. First, it promoted physical associations between CD9 and CD151, and between ?3 integrin and other proteins. Second, it protected CD151 and CD9 from lysosomal degradation. Third, the presence of DHHC2, but not other DHHC proteins, shifted cells away from a dispersed state and toward increased cellcell contacts.

Sharma, Chandan; Yang, Xiuwei H.

2008-01-01

352

DHHC2 affects palmitoylation, stability, and functions of tetraspanins CD9 and CD151.  

PubMed

Although palmitoylation markedly affects tetraspanin protein biochemistry and functions, relevant palmitoylating enzymes were not known. There are 23 mammalian "DHHC" (Asp-His-His-Cys) proteins, which presumably palmitoylate different sets of protein substrates. Among DHHC proteins tested, DHHC2 best stimulated palmitoylation of tetraspanins CD9 and CD151, whereas inactive DHHC2 (containing DH-->AA or C-->S mutations within the DHHC motif) failed to promote palmitoylation. Furthermore, DHHC2 associated with CD9 and CD151, but not other cell surface proteins, and DHHC2 knockdown diminished CD9 and CD151 palmitoylation. Knockdown of six other Golgi-resident DHHC proteins (DHHC3, -4, -8, -17, -18, and -21) had no effect on CD9 or CD151. DHHC2 selectively affected tetraspanin palmitoylation, but not the palmitoylations of integrin beta4 subunit and bulk proteins visible in [(3)H]palmitate-labeled whole cell lysates. DHHC2-dependent palmitoylation also had multiple functional effects. First, it promoted physical associations between CD9 and CD151, and between alpha3 integrin and other proteins. Second, it protected CD151 and CD9 from lysosomal degradation. Third, the presence of DHHC2, but not other DHHC proteins, shifted cells away from a dispersed state and toward increased cell-cell contacts. PMID:18508921

Sharma, Chandan; Yang, Xiuwei H; Hemler, Martin E

2008-08-01

353

Susceptibility to erbB-induced erythroblastosis is a dominant trait of 151 chickens.  

PubMed Central

Rous-associated virus-1 (RAV-1)-induced erythroblastosis results from proviral insertions into or viral transductions of the c-erbB region of the epidermal growth factor gene. Most chickens develop low incidences (less than 5%) of RAV-1-induced erythroblastosis. However, an inbred line of chickens (151) suffers high incidences (approximately 80%) of RAV-1-induced erythroblastosis. Analysis of 151, K28, and (K28 X 151) X K28 chickens for susceptibility to RAV-1-induced erythroblastosis revealed that susceptibility to RAV-1-induced erythroblastosis is a dominant trait of line 151 chickens. Analysis of 151 X K28 and K28 chicks for susceptibility to the induction of erythroblastosis by two new c-erbB-transducing viruses (avian erythroblastosis virus strains AEV-5005 and AEV-5009) revealed that susceptibility to transformation by new c-erbB-transducing viruses is also a dominant trait of 151 chickens. We think it is likely that both of these dominant traits are encoded by the same gene or genes. Our hypothesis is that this gene (or genes) potentiates the ability of the transmembrane and cytoplasmic domains of the epidermal growth factor receptor to transform cells.

Robinson, H L; Miles, B D; Catalano, D E; Briles, W E; Crittenden, L B

1985-01-01

354

In vitro bioequivalence approach for a locally acting gastrointestinal drug: lanthanum carbonate.  

PubMed

A conventional human pharmacokinetic (PK) in vivo study is often considered as the "gold standard" to determine bioequivalence (BE) of drug products. However, this BE approach is not always applicable to the products not intended to be delivered into the systemic circulation. For locally acting gastrointestinal (GI) products, well designed in vitro approaches might be more practical in that they are able not only to qualitatively predict the presence of the active substance at the site of action but also to specifically assess the performance of the active substance. For example, lanthanum carbonate chewable tablet, a locally acting GI phosphate binder when orally administrated, can release free lanthanum ions in the acid environment of the upper GI tract. The lanthanum ions directly reach the site of action to bind with dietary phosphate released from food to form highly insoluble lanthanum-phosphate complexes. This prevents the absorption of phosphate consequently reducing the serum phosphate. Thus, using a conventional PK approach to demonstrate BE is meaningless since plasma levels are not relevant for local efficacy in the GI tract. Additionally the bioavailability of lanthanum carbonate is less than 0.002%, and therefore, the PK approach is not feasible. Therefore, an alternative assessment method is required. This paper presents an in vitro approach that can be used in lieu of PK or clinical studies to determine the BE of lanthanum carbonate chewable tablets. It is hoped that this information can be used to finalize an in vitro guidance for BE studies of lanthanum carbonate chewable tablets as well as to assist with "in vivo" biowaiver decision making. The scientific information might be useful to the pharmaceutical industry for the purpose of planning and designing future BE studies. PMID:23249191

Yang, Yongsheng; Shah, Rakhi B; Yu, Lawrence X; Khan, Mansoor A

2013-02-01

355

Silica-lanthanum oxide: pioneer composite of rare-Earth metal oxide in selective phosphopeptides enrichment.  

PubMed

Relying on the successful journey of metal oxides in phosphoproteomics, lanthanum oxide is employed for the engineering of an affinity material for phosphopeptide enrichment. The lanthanum oxide is chemically modified on the surface of silica and characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR). The obtained silica-lanthanum oxide composite is applied for the selective enrichment of phosphopeptides from tryptic digest of standard protein (?-casein, ?-casein, and commercially available casein mixtures from bovine milk). The enriched entities are analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The mass spectroscopy (MS) results show that the silica-lanthanum oxide composite exhibits enhanced capability for phosphopeptide enrichment with sensitivity assessed to be 50 fmol. Sequence coverage of casein is interpreted showing successful recovery. As a real sample, a protein digest of nonfat milk is applied. Also, the ability of lanthanum in different formats is checked in the selective phosphopeptides enrichment. The composite holds promising future in economic ground as it also possesses the regenerative ability for repetitive use. PMID:23134445

Jabeen, Fahmida; Hussain, Dilshad; Fatima, Batool; Musharraf, S Ghulam; Huck, Christian W; Bonn, G?nther K; Najam-ul-Haq, Muhammad

2012-12-01

356

Processing Techniques Developed to Fabricate Lanthanum Titanate Piezoceramic Material for High-Temperature Smart Structures  

NASA Technical Reports Server (NTRS)

Piezoelectric ceramic materials are potential candidates for use as actuators and sensors in intelligent gas turbine engines. For piezoceramics to be applied in gas turbine engines, they will have to be able to function in temperatures ranging from 1000 to 2500 F. However, the maximum use temperature for state-of-the-art piezoceramic materials is on the order of 300 to 400 F. Research activities have been initiated to develop high-temperature piezoceramic materials for gas turbine engine applications. Lanthanum titanate has been shown to have high-temperature piezoelectric properties with Curie temperatures of T(sub c) = 1500 C and use temperatures greater than 1000 C. However, the fabrication of lanthanum titanate poses serious challenges because of the very high sintering temperatures required for densification. Two different techniques have been developed at the NASA Glenn Research Center to fabricate dense lanthanum titanate piezoceramic material. In one approach, lower sintering temperatures were achieved by adding yttrium oxide to commercially available lanthanum titanate powder. Addition of only 0.1 mol% yttrium oxide lowered the sintering temperature by as much as 300 C, to just 1100 C, and dense lanthanum titanate was produced by pressure-assisted sintering. The second approach utilized the same commercially available powders but used an innovative sintering approach called differential sintering, which did not require any additive.

Goldsby, Jon C.; Farmer, Serene C.; Sayir, Ali

2004-01-01

357

Enhancement of ferromagnetic and dielectric properties of lanthanum doped bismuth ferrite nanostructures  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Rod shaped lanthanum doped bismuth ferrite was obtained. Black-Right-Pointing-Pointer The diameter of the particles were found to be decreasing on doping with lanthanum. Black-Right-Pointing-Pointer Both ferromagnetic and dielectric properties enhanced. Black-Right-Pointing-Pointer A transition due to spin canting is observed near 550 Degree-Sign C. Black-Right-Pointing-Pointer Electron spin resonance study shows the breakage of spin cycloid due to doping. -- Abstract: Cylindrical-shaped multiferroic Bi{sub 1-x}La{sub x}FeO{sub 3} (x = 0.0, 0.05, 0.1 and 0.15) were synthesized successfully by hydrothermal method. All samples were found to be rhombohedrally distorted perovskite structure. Diameter of the cylindrical particles reduces from {approx}450 nm for x = 0.0 to {approx}100 nm for x = 0.1 prepared under the same conditions. The Neel temperature as well as the dielectric constant was also found to increase with the increase in lanthanum content. Lanthanum doping also enhanced the magnetic properties. Magnetization measurements above room temperature show a significant increase in magnetization at around 400 Degree-Sign C. Enhanced magnetic properties due to lanthanum doping are caused by the breakage of spin cycloid as observed by electron spin resonance study.

Chaudhuri, A., E-mail: arka@bose.res.in [Magnetism Laboratory, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 098 (India); Mandal, K. [Magnetism Laboratory, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 098 (India)] [Magnetism Laboratory, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 098 (India)

2012-04-15

358

Rutherford backscattering spectrometry (RBS) characterization of oxide scale formed on (AISI304) steel after surface deposition of lanthanum  

Microsoft Academic Search

Oxidized AISI-304 steel samples coated with lanthanum have been investigated by Rutherford backscattering spectrometry (RBS) in order to determine the composition profile of the oxide scale. In this sense, RBS technique has been revealed as a very reliable and nondestructive method for depth profile analysis. Lanthanum deposition, specially over preoxidized specimens, has proven to improve their resistance to high temperature

F. J. Ager; M. A. Respaldiza; J. J. Benitez; J. C. Soares; M. F. da Silva; J. A. Odriozola

1996-01-01

359

The incorporation of plutonium in lanthanum zirconate pyrochlore  

NASA Astrophysics Data System (ADS)

The incorporation of plutonium (Pu) within lanthanum zirconate pyrochlore was investigated using air, argon, and N2-3.5%H2 sintering atmospheres together with Ca2+ and Sr2+ incorporation for charge compensation. The samples have been characterised in the first instance by X-ray diffraction (XRD), scanning electron microscopy (SEM) and diffuse reflectance spectroscopy (DRS). The results show Pu can be exchanged for La3+ on the A-site with and without charge compensation and for Zr4+ on the B-site. DRS measurements were made over the wavenumber range of 4000-19,000 cm-1 and the Pu in all air- and argon-sintered samples was found to be present as Pu4+ while that in samples sintered in N2-3.5%H2 was present as Pu3+. The Pu valence was confirmed for three of the samples using X-ray near-edge absorption spectroscopy (XANES). Pu valences >4+ were not observed in any of the samples.

Gregg, Daniel J.; Zhang, Yingjie; Middleburgh, Simon C.; Conradson, Steven D.; Triani, Gerry; Lumpkin, Gregory R.; Vance, Eric R.

2013-11-01

360

Lanthanum Molybdenum Oxide: Low Temperature Synthesis and Characterization  

SciTech Connect

A recently developed fast oxide ion conductor, namely lanthanum molybdenum oxide (La{sub 2}Mo{sub 2}O{sub 9}, LAMO), was synthesized instantaneously by a citrate-nitrate auto-ignition process at a fixed citrate to nitrate ratio of 0.3 and characterized by thermal analysis, x-ray diffraction, impedance spectroscopy, and thermal expansion measurements. Crystalline LAMO has formed instantaneously during the combustion process. The signature of the order-disorder transition of stoichiometric LAMO around 570 degrees C was evident from differential thermal analysis, differential scanning calorimetry electrical conductivity, and thermal expansion measurements. Though the in situ x-ray measurements did not indicate any clear evidence of a phase transition, a stepwise change in the lattice parameter near the vicinity of the transition temperature was apparent thereby confirming the phase transition to be of first order in nature. The thermal expansion coefficient of LAMO was calculated to be 13.92 x 10-6/ degrees K at 950 degrees C. The present method formed phase pure LAMO instantaneously and produced sintered samples with high conductivity, namely, 0.052 S/cm at 800 degrees C and 0.08 S/cm at 950 degrees C compared to LAMO prepared through various other solution routes.

Basu,S.; Devi, P.; Mati, A.; Lee, Y.; Hanson, J.

2006-01-01

361

Assessing Lanthanum-Bromide Detectors for Safeguards Applications  

SciTech Connect

Major detector technologies currently being used for gamma-ray spectroscopy in safeguards applications include systems based on sodium iodide (NaI), cadmium-zinc-telluride (CZT), cadmium-telluride (CdTe), and high-purity germanium (HPGe) crystals. Recently, a new scintillation detector based on a lanthanum bromide (LaBr3) crystal has become commercially available. The declared benefits of this new detector technology include higher resolution and improved efficiency compared with similarly configured NaI-based systems. Both detector systems offer the advantage of room-temperature operation. This paper describes the results of a study assessing the safeguards applicability and advantages for isotopic and quantitative analyses of uranium using the LaBr3-based detector, as well as an investigation into the general operating characteristics of the LaBr3-based detector. The results are compared with those from a widely used NaI-based detector system (Canberra's Inspector-1000 multichannel analyzer) operated under similar environmental conditions and hardware configuration, using commercially available software packages (NaIGEM and Genie-2000).

Gariazzo, Claudio Andres [ORNL; Saavedra, Steven F [ORNL; Smith, Steven E [ORNL; Solodov, Alexander A [ORNL

2008-01-01

362

Crystal structure and physicochemical properties of doped lanthanum manganites  

NASA Astrophysics Data System (ADS)

Substituted lanthanum-strontium manganites La0.7Sr0.3Mn0.9Me0.1O3 ? (Me = Ti, Cr, Fe, and Cu) are obtained by standard ceramic and glycerin-nitrate techniques. High-temperature powder X-ray diffraction is employed to study the crystal structure of La0.7Sr0.3Mn0.9Me0.1O3 ? oxides. It is shown that in the range 298-1023 K in air, La0.7Sr0.3Mn0.9Me0.103 ? manganites crystallized in an orthorhombic cell (space group R-3c). The isobaric temperature dependences of unit cell parameters are determined. Thermal expansion coefficients are calculated for La0.7Sr0.3Mn0.9Me0.103 ? oxides. The conductivity of La0.7Sr0.3Mn0.9Me0.103 ? is studied as a function of temperature in the range 500 K ? T ? 1200 K in air. It is shown that substituting 3 d metal for manganese considerably lowers the conductivity of basic La0.7Sr0.3Mn0.9O3 ?. The chemical stability of iron-substituted manganite La0.7Sr0.3Mn0.9Fe0.1O3 ? is studied with respect to the electrolyte material.

Aksenova, T. V.; Gavrilova, L. Ya.; Cherepanov, V. A.

2012-12-01

363

Lanthanum reduces the excitation efficiency in fly photoreceptors  

PubMed Central

Lanthanum (La3+), a known inhibitor of Ca2+ binding proteins, was applied to the extracellular space of fly retina. Shot noise analysis indicated that a combination of intense light and La3+ caused a large (down to zero) reduction in the rate of occurrence of the quantal responses to single photons (quantum bumps) which sum to produce the photoreceptor potential. Light in the presence of La3+ also increased the effective bump duration. These effects are very similar to the effects of the mutations trp of Drosophila and nss of Lucilia flies on the quantum bump rate and duration. La3+ applied to the nss mutant caused only a small reduction in the bump rate, suggesting that La3+ may affect the nss gene product which is deficient in the mutant. The close similarity in the properties of the receptor potential of the La(3+)-treated photoreceptor of the wild type and of the nss mutant together with existing evidence for the highly reduced intracellular Ca2+ ([Ca2+]i) level in nss photoreceptors suggest that both La3+ and the mutation cause a severe reduction in [Ca2+]i. This effect may arise from an inhibition of a Ca2+ transporter protein located in the surface membrane that normally replenishes Ca2+ pools in the photoreceptors, a process essential for light excitation.

1991-01-01

364

Mechanical properties of magnesia-doped lanthanum chromite versus temperature  

SciTech Connect

Magnesia-doped lanthanum chromite is a potential material for use in solid oxide fuel cells as an interconnector due to its resistance to oxidation and reduction. The strength and toughness of La(Cr{sub 0.9}Mg{sub 0.1})O{sub 3} were measured from 25 to 1,000 C in the as-fired reduced state and after oxidation. The as-fired samples showed a peak in toughness of approximately 3.9 MPa{center_dot}m{sup 1/2} at 125 C which decreased to approximately 1.4 MPa{center_dot}m{sup 1/2} at 600 C and 2.8 MPa{center_dot}m{sup 1/2} at room temperature. This peak in toughness is hypothesized to be due to the rhombohedral-to-orthorhombic phase transition by a toughening mechanism that is currently being investigated. The strength was also affected by the phase transition for both the as-fired reduced and the oxidized samples.

Montross, C.S.; Yokokawa, Harumi; Dokiya, Masayuki [National Institute for Materials and Chemical Research, Tsukuba, Ibaraki (Japan); Bekessy, L. [Univ. of Queensland, Brisbane (Australia). Dept. of Mining and Metallurgy

1995-07-01

365

First-principles thermodynamic modeling of lanthanum chromate perovskites  

NASA Astrophysics Data System (ADS)

Tendencies toward local atomic ordering in (A,A')(B,B')O3-? mixed composition perovskites are modeled to explore their influence on thermodynamic, transport, and electronic properties. In particular, dopants and defects within lanthanum chromate perovskites are studied under various simulated redox environments. (La1-x,Srx)(Cr1-y,Fey)O3-? (LSCF) and (La1-x,Srx)(Cr1-y,Ruy)O3-? (LSCR) are modeled using a cluster expansion statistical thermodynamics method built upon a density functional theory database of structural energies. The cluster expansions are utilized in lattice Monte Carlo simulations to compute the ordering of Sr and Fe(Ru) dopant and oxygen vacancies (Vac). Reduction processes are modeled via the introduction of oxygen vacancies, effectively forcing excess electronic charge onto remaining atoms. LSCR shows increasingly extended Ru-Vac associates and short-range Ru-Ru and Ru-Vac interactions upon reduction; LSCF shows long-range Fe-Fe and Fe-Vac interaction ordering, inhibiting mobility. First principles density functional calculations suggest that Ru-Vac associates significantly decrease the activation energy of Ru-Cr swaps in reduced LSCR. These results are discussed in view of experimentally observed extrusion of metallic Ru from LSCR nanoparticles under reducing conditions at elevated temperature.

Dalach, P.; Ellis, D. E.; van de Walle, A.

2012-01-01

366

Defect Energetics and Nonstoichiometry in Lanthanum Magnesium Hexaaluminate  

NASA Astrophysics Data System (ADS)

Computer-based atomistic simulation methods are applied to address quantitatively the defect energetics and crystal chemistry of lanthanum magnesium hexaaluminate (LMA). The tetrahedral site preference of Mg in the magnetoplumbite structure is determined by calculating lattice energies for different Mg ion distributions. It is revealed that the intrinsic and extrinsic disorders are much influenced by the distribution of Mg in the structure. Our calculations show that oxygen Frenkel disorder is the dominant defect mode to be expected, even though Schottky disorder may also exist. Several feasible defect processes in nonstoichiometric LMA are determined from the enthalpies of the quasi-chemical reactions for the processes with simple point defect energies. We have also modeled some defect complexes in the mirror plane regions. It is found that the Mg ions positioned in the tetrahedral sites suppress the formation of cation vacancies in the mirror plane, through hindering the relaxation of the 12 kAl ions by which the vacancies are stabilized. In Mg-deficient nonstoichiometric LMA, however, it is expected that the defect complex [V La+V Al+2(V Al+Al i)] will be formed in the interspinel layer. Our calculations also indicate that the O Ladefect is improbable in LMA not only as a simple point defect but also as a member of a defect complex.

Park, Jae-Gwan; Cormack, A. N.

1997-05-01

367

Work function measurement of lanthanum-boron compounds  

NASA Technical Reports Server (NTRS)

The relationship between emission properties and sample composition is studied for lanthanum-boron compounds. Specifically, the La-B system is considered between 1400 and 2100 K and between LaB(4.24) and LaB(29.2) to determine the phase relationship, chemical activity of the compounds, vapor composition, and vaporization rate. The results indicate that: (1) a blue-colored phase near LaB(9) exists between a purple-colored LaB(6) and elemental boron, (2) vaporization is sufficiently more rapid than diffusion so that great compositional differences exist between the surface and the interior, (3) an activation energy lowers the boron vaporization rate from LaB(6), and (4) a steady-state surface composition between LaB(6.04) and LaB(6.07) exists for freely vaporizing materials as a function of interior composition, purity, and temperature. It is noted that the ultimate life of a thermionic diode is governed by electrode vaporization rate whereas efficiency is governed by the electrode work function.

Jacobson, D. L.; Storms, E. K.

1978-01-01

368

A new homologous series of lanthanum copper oxides  

SciTech Connect

The authors report the synthesis and structural characterization of a new homologous series of lanthanum cuprates, with the formula La{sub 4+4n}Cu{sub 8+2n}O{sub 14+8n}. The n = 2 and n = 3 members, La{sub 2}Cu{sub 2}O{sub 5} and La{sub 8}Cu{sub 7}O{sub 19}, synthesized in the bulk, are stable in very narrow temperature ranges in air and oxygen. The n = 4 member was observed by electron microscopy. The crystal structure of La{sub 2}Cu{sub 2}O{sub 5} consists of thin ribbons of La{sub 2}CuO{sub 4} sandwiched between Cu-O planes of complex low dimensional geometry. The temperature-dependent magnetic susceptibilities of La{sub 2}Cu{sub 2}O{sub 5} and La{sub 8}Cu{sub 7}O{sub 19} are characteristic of low dimensional Heisenberg antiferromagnets with a low exchange coupling energy.

Cava, R.J.; Siegrist, T.; Hessen, B.; Krajewski, J.J.; Peck, W.F. Jr.; Batlogg, B.; Takagi, H.; Waszczak, J.V.; Schneemeyer, L.F. (AT and T Bell Labs., Murray Hill, NJ (United States)); Zandbergen, H.W. (Delft Univ. of Tech. (Netherlands))

1991-09-01

369

Deposition and investigation of lanthanum-cerium hexaboride thin films  

SciTech Connect

Thin films of lanthanum-cerium hexaboride, the promising thermoelectric material for low-temperature applications, are deposited on various substrates by the electron-beam evaporation, pulsed laser deposition and magnetron sputtering. The influence of the deposition conditions on the films X-ray characteristics, composition, microstructure and physical properties, such as the resistivity and Seebeck coefficient, is studied. The preferred (100) orientation of all films is obtained from XRD traces. In the range of 780-800 deg. C deposition temperature the highest intensity of diffractions peaks and the highest degree of the preferred orientation are observed. The temperature dependence of the resistivity and the Seebeck coefficient of films are investigated in the temperature range of 4-300 K. The features appropriate to Kondo effect in the dependences {rho}(T) and S(T) are detected at temperatures below 20 K. Interplay between the value of the Seebeck coefficient, metallic parameters and Kondo scattering of investigated films is discussed. - Graphical abstract: Kondo scattering in (La,Ce)B{sub 6} films: temperature dependence of the resistivity of (La,Ce)B{sub 6} films on various substrates and the ceramics La{sub 0.99}Ce{sub 0.01}B{sub 6}.

Kuzanyan, A.S. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia)]. E-mail: akuzan@ipr.sci.am; Harutyunyan, S.R. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia); Vardanyan, V.O. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia); Badalyan, G.R. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia); Petrosyan, V.A. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia); Kuzanyan, V.S. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia); Petrosyan, S.I. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia); Karapetyan, V.E. [Institute for Physical Research NAS, Ashtarak, 378410 (Armenia); Wood, K.S. [NRL, Washington, DC 20375 (United States); Wu, H.-D. [SFA/NRL, Washington, DC 20375 (United States); Gulian, A.M. [Physics Art Frontiers/NRL, Washington, DC 20375 (United States)

2006-09-15

370

Altering the equilibrium condition in Sr-doped lanthanum manganite.  

SciTech Connect

The material of choice for a solid oxide fuel cell cathode based on a yttria-stabilized zirconia (YSZ) electrolyte is doped lanthanum manganite, (La, Sr)MnO{sub 3}. It excels at many of the attributes necessary for a system to work at the required operating temperature and is flexible enough to allow for materials optimization. Although strontium-doping increases the electronic conductivity of the material, the ionic conductivity of the material remains negligible under operating conditions. Studies have shown that the internal equilibrium of the material heavily favors oxidation of the manganese and rather than the loss of lattice oxygen as a charge compensation mechanism. This lack of oxygen vacancies in the structure retards the ability of the material to conduct oxygen ions; thus the optimized system requires a large number of engineered triple point boundary locations to work efficiently. We have successfully doped the host LSM lattice to alter the interred equilibrium of the material to increase its ionic conductivity and thus lower the cathodic overpotential of the system. Our presentation will discuss these new materials, the results of cell tests, and a number of characterization experiments performed.

Carter, J. D.; Krumpelt, M.; Vaughey, J.; Wang, X.

1999-05-28

371

Electrical and pyroelectric properties of lanthanum based niobate  

NASA Astrophysics Data System (ADS)

A lanthanum based new tungsten bronze (TB) ferroelectrics (K2Pb2La2W2Ti4Nb4O30) was synthesized by a mixed-oxide method at high temperature. Thermogravimetry analysis (TG) technique was used to decide the material preparation conditions. The formation of desired compound was confirmed by preliminary X-ray structural analysis. The SEM micrograph of the sintered sample exhibits uniform rod-like grain distribution without many voids. Detailed studies of the nature of variation of dielectric parameters with temperature and frequency shows dielectric anomaly at 310 C. The temperature dependence of electrical parameters (impedance, modulus, conductivity, etc) of the material exhibits a strong correlation between its micro-structure (i.e., bulk, grain boundary, etc) and electrical properties. The dc conductivity follows the Arrhenius equation, and thus its variation with rise in temperature reveals the negative temperature coefficient of resistance (NTCR) behavior of the material. The material obeys Jonscher's universal power law which is evident from the frequency dependence of ac conductivity. The variation of current with temperature shows that the material has high pyroelectric co-efficient and figure of merit. Hence the material is useful for pyroelectric sensors.

Padhee, R.; Das, Piyush R.; Parida, B. N.; Choudhary, R. N. P.

2013-02-01

372

Ambi-site substitution of Mn in lanthanum germanate apatites  

SciTech Connect

A neutron diffraction study at 4 K of the Mn doped lanthanum germanate apatite-type oxide ion conductor of nominal starting composition 'La{sub 9.5}Mn{sub 0.5}(GeO{sub 4}){sub 6}O{sub 2.75}' is reported. The structure was refined in space group P6{sub 3}/m, although high thermal displacement parameters were observed for the oxide ion sites (particularly O3, and O4). Reduced thermal displacement parameters were obtained by splitting the O3 site, and allowing the O4 oxygen to move off site, which may indicate local regions of lower symmetry within the structure. In addition, the data suggested ambi-site substitution of Mn, with it being present on both the Ge site and the La site. Assuming no change in La:Mn:Ge ratio, a composition of La{sub 9.18}Mn{sub 0.28}(GeO{sub 4}){sub 5.8}(MnO{sub 4}){sub 0.2}O{sub 2} was determined. As such there are nominally no interstitial oxide ions, but rather cation vacancies on the La site. Therefore, the high conductivity for this sample is most likely related to the introduction of Frenkel-type defects at higher temperature, as previously proposed for other apatite-type systems containing vacancies on the La site.

Kendrick, E. [Chemical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom); Knight, K.S. [ISIS Facility, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX (United Kingdom); Slater, P.R., E-mail: p.r.slater@bham.ac.uk [School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)

2009-08-05

373

Study of prolonged administration of lanthanum carbonate in dialysis patients.  

PubMed

Data of 36 months were accumulated regarding the effects of lanthanum carbonate (LA) on serum phosphate concentrations in dialysis patients. Fifty-three patients (average age and dialysis history 58.4 years and 9.1 years) were included in this study who have been receiving outpatient treatment since March 2009, and who have been unable to maintain serum phosphate concentrations of ?6.0?mg/dL via traditional therapeutic agents used for hyperphosphatemia. Patients were given dosage of LA in addition to, or instead of, co-hyperphosphatemia treatments already being received. Mean dosages of calcium carbonate (CC) and sevelamer hydrochloride (SH) before starting LA administration were 1301.9?mg and 2462.3?mg, respectively. Dosage of LA for all cases was 750?mg at initial dose; 1528.3?mg at 5 months; and 1416.7?mg at 30 months. Dosage of other phosphate binders were 905.7?mg of CC and 820.8?mg of SH at 5 months; and 687.5?mg of CC and 1031.3?mg of SH at 30 months. Serum phosphorus levels (P levels) were significantly decreased at 1 month of LA administration, and continued until 30 months of La treatment. These results suggest that LA successfully controlled serum P and Ca concentrations simultaneously within target ranges without affecting serum intact parathyroid hormone concentration, although further long-term prospective cohort study on LA would be required. PMID:23586507

Gotoh, Junichi; Kukita, Kazutaka; Tsuchihashi, Seiichiro; Hattori, Masahiro; Iida, Junichi; Horie, Takashi; Onodera, Kazuhiko; Furui, Hidenori; Tamaki, Toru; Meguro, Junichi; Yonekawa, Motoki; Kawamura, Akio

2013-04-01

374

Stellar neutron capture cross section of the unstable s-process branching point {sup 151}Sm  

SciTech Connect

The neutron capture cross sections of the radioactive isotope {sup 151}Sm and of natural samarium have been measured in the energy range from 3 keV to 225 keV at the Karlsruhe 3.7 MV Van de Graaff accelerator. Neutrons were produced via the {sup 7}Li(p,n){sup 7}Be reaction by bombarding metallic Li targets with a pulsed proton beam and capture events were registered with the Karlsruhe 4{pi} Barium Fluoride Detector. The cross sections were determined relative to the gold standard using a 206 mg sample of samarium oxide with 90% enrichment in {sup 151}Sm. Over most of the measured energy range uncertainties of {approx}2-3% could be achieved for the {sup 151}Sm/{sup 197}Au ratio. Maxwellian averaged neutron capture cross sections of {sup 151}Sm were calculated for thermal energies between kT = 8 keV and 100 keV with due consideration of the stellar enhancement factor and were found to be systematically larger than all previous theoretical predictions used in the analysis of the s-process branching at {sup 151}Sm. In the context of the branching analysis, an experimental determination of the stellar enhancement factor due to captures in thermally excited states is proposed, and the tentative determination of the p-process residual of {sup 152}Gd and a few other cases is discussed.

Wisshak, K.; Voss, F.; Kaeppeler, F.; Krticka, M.; Raman, S.; Mengoni, A.; Gallino, R. [Forschungszentrum Karlsruhe, Institut fuer Kernphysik, Postfach 3640, D-76021 Karlsruhe (Germany); Faculty of Mathematics and Physics, Charles University, CZ-180 00 Prague (Czech Republic); Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831-6354 (United States); CERN, CH-1211 Geneva 23 (Switzerland) and IAEA, Nuclear Data Section, P.O. Box 100, A-1400 Vienna (Austria); Dipartimento di Fisica Generale, Universita di Torino, Sezione INFN di Torino, Via P. Giuria 1, I-10125 Turin (Italy) and Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences, Monash University 3800, Victoria (Australia)

2006-01-15

375

Tetraspanin, CD151, is required for maintenance of trigeminal placode identity.  

PubMed

The trigeminal ganglion is the largest of the cranial ganglia and responsible for transmitting sensory information for much of the face. The cell surface glycoprotein CD151 is an early marker of the trigeminal placode, the precursor to the ganglion. Here, we investigate the role of CD151 during specification of trigeminal placode cells in the developing chicken embryo. Expression of the transcription factor Pax3, the earliest known marker of the trigeminal placode, briefly precedes that of CD151, but they then subsequently overlap in the trigeminal placode. Loss of CD151 protein dramatically decreases the number of Pax3+ placode cells in Stage 13-14 embryos, leading to loss of ophthalmic trigeminal neurons by Stages 16 and 17. Although the initial size of the Pax3 population is similar to that in controls, the number of Pax3+ cells decreases with time without alterations in cell death or proliferation. This suggests a role for CD151 in maintenance of the specification state in the trigeminal placode, uncovering the first known role for a tetraspanin in a developmental system. PMID:21250998

McCabe, Kathryn L; Bronner, Marianne

2011-04-01

376

Bifunctional lanthanum phosphate substrates as novel adsorbents and biocatalyst supports for perchlorate removal.  

PubMed

Porous lanthanum phosphate substrates, obtained by an environmentally benign colloidal forming process employing methyl cellulose, are reported here as excellent adsorbents of perchlorate with >98% efficiency and with 100% reusability. Additionally, the effectiveness of such substrates as biocatalyst supports that facilitate biofilm formation of perchlorate reducing microbes (Serratia marcescens NIIST 5) is also demonstrated for the first time. The adsorption of perchlorate ions is attributed to the pore structure of lanthanum phosphate substrate and the microbial attachment is primarily ascribed to its intrinsic hydrophobic property. Lanthanum phosphate thus emerges as a dual functional material that possesses an integrated adsorption/bioremediation property for the effective removal of ClO4(-) which is an increasingly important environmental contaminant. PMID:24872208

Sankar, Sasidharan; Prajeesh, Gangadharan Puthiya Veetil; Anupama, Vijaya Nadaraja; Krishnakumar, Bhaskaran; Hareesh, Padinhattayil; Nair, Balagopal N; Warrier, Krishna Gopakumar; Hareesh, Unnikrishnan Nair Saraswathy

2014-06-30

377

Terbium-activated lithiumlanthanumaluminosilicate oxyfluoride scintillating glass and glass-ceramic  

Microsoft Academic Search

Terbium-activated lithiumlanthanumaluminosilicate oxyfluoride scintillating glasses, 55SiO26Al2O328Li2O11LaF3 doped with different TbF3 concentrations, have been fabricated and investigated. By appropriate heat treatment of the as-prepared glasses above, transparent glass-ceramics were obtained. Differential scanning calorimetry, X-ray diffraction, optical absorption, and luminescence under both UV and beta-particle excitation have been investigated on as-prepared glasses and glass-ceramics. It has been found that these terbium-activated lithiumlanthanumaluminosilicate

Z. Pan; K. James; Y. Cui; A. Burger; N. Cherepy; S. A. Payne; R. Mu; S. H. Morgan

2008-01-01

378

High-efficiency, low-temperature cesium diodes with lanthanum-hexaboride electrodes  

NASA Technical Reports Server (NTRS)

Lanthanum hexaboride electrodes in 1700 K cesium diodes may triple power outputs compared with those demonstrated for nuclear thermionic space applications. Still greater relative gains seem possible for emitters below 1700 K. Further improvements in cesium diode performance should result from the lower collector temperatures allowed for earth and low power space duties. Decreased temperatures will lessen thermal transport losses that attend thermionic conversion mechanisms. Such advantages will add to those from collector Carnot and electrode effects. If plasma ignition difficulties impede diode temperature reductions, recycling small fractions of the output power could provide ionization. So high efficiency, low temperature cesium diodes with lanthanum hexaboride electrodes appear feasible.

Morris, J. F.

1974-01-01

379

LaZnB5O10, the first lanthanum zinc borate  

PubMed Central

Lanthanum zinc pentaborate, LaZnB5O10, was synthesized by flux-supported solid-state reaction. It is a member of the LnMB5O10 (Ln = rare earth ion and M = divalent metal ion) structure type. The crystal shows a three-dimensional structure constructed from two-dimensional {[B5O10]5?}n layers with the lanthanum (coordination number nine) and zinc (coordination number six) ions filling in the interlayers.

Jiao, Zhi-Wei; Wang, Ru-Ji; Wang, Xiao-Qing; Shen, De-Zhong; Shen, Guang-Qiu

2010-01-01

380

Near fifty percent sodium substituted lanthanum manganites-A potential magnetic refrigerant for room temperature applications  

NASA Astrophysics Data System (ADS)

Nearly half of lanthanum sites in lanthanum manganites were substituted with monovalent ion-sodium and the compound possessed distorted orthorhombic structure. Ferromagnetic ordering at 300 K and the magnetic isotherms at different temperature ranges were analyzed for estimating magnetic entropy variation. Magnetic entropy change of 1.5 Jkg-1K-1 was observed near 300 K. An appreciable magnetocaloric effect was also observed for a wide range of temperatures near 300 K for small magnetic field variation. Heat capacity was measured for temperatures lower than 300 K and the adiabatic temperature change increases with increase in temperature with a maximum of 0.62 K at 280 K.

Sethulakshmi, N.; Al-Omari, I. A.; Suresh, K. G.; Anantharaman, M. R.

2014-03-01

381

Integrin-Associated CD151 Drives ErbB2-Evoked Mammary Tumor Onset and Metastasis12  

PubMed Central

ErbB2+ human breast cancer is a major clinical problem. Prior results have suggested that tetraspanin CD151 might contribute to ErbB2-driven breast cancer growth, survival, and metastasis. In other cancer types, CD151 sometimes supports tumor growth and metastasis. However, a definitive test of CD151 effects on de novo breast cancer initiation, growth, and metastasis has not previously been done. We used CD151 gene-deleted mice expressing the MMTV-ErbB2 transgene to show that CD151 strongly supports ErbB2+ mammary tumor initiation and metastasis. Delayed tumor onset (by 70100 days) in the absence of CD151 was accompanied by reduced survival of mammary epithelial cells and impaired activation of FAK- and MAPK-dependent pathways. Both primary tumors and metastatic nodules showed smooth, regular borders, consistent with a less invasive phenotype. Furthermore, consistent with impaired oncogenesis and decreased metastasis, CD151-targeted MCF-10A/ErbB2 cells showed substantial decreases in three-dimensional colony formation, EGF-stimulated tumor cell motility, invasion, and transendothelial migration. These CD151-dependent functions were largely mediated through ?6?4 integrin. Moreover, CD151 ablation substantially prevented PKC- and EGFR/ERK-dependent ?6?4 integrin phosphorylation, consistent with retention of epithelial cell polarity and intermediate filament cytoskeletal connections, which helps to explain diminished metastasis. Finally, clinical data analyses revealed a strong correlation between CD151 and ErbB2 expression and metastasis-free survival of breast cancer patients. In conclusion, we provide strong evidence that CD151 collaborates with LB integrins (particularly ?6?4) and ErbB2 (and EGFR) receptors to regulate multiple signaling pathways, thereby driving mammary tumor onset, survival, and metastasis. Consequently, CD151 is a useful therapeutic target in malignant ErbB2+ breast cancer.

Deng, Xinyu; Li, Qinglin; Hoff, John; Novak, Marian; Yang, Helen; Jin, Hongyan; Erfani, Sonia F; Sharma, Chandan; Zhou, Pengcheng; Rabinovitz, Isaac; Sonnenberg, Arnoud; Yi, Yajun; Zhou, Peter; Stipp, Christopher S; Kaetzel, David M; Hemler, Martin E; Yang, Xiuwei H

2012-01-01

382

The role of the tetraspanin CD151 in primary keratinocyte and fibroblast functions: Implications for wound healing  

SciTech Connect

Previous studies showed that CD151-null mice have a skin wound healing deficit. To gain an understanding of the role of CD151 in re-epithelialisation and dermal contraction, keratinocyte and fibroblast functions were assayed. Primary CD151-null keratinocytes displayed defective migration on Matrigel (a basement membrane equivalent) and laminin-332, the primary adhesion component of basement membranes, but not on collagen-I. Adhesion, spreading and proliferation were also deficient on laminin-332, but not collagen-I. The data suggest that loss of CD151 impairs the function of its primary interaction partners, integrin {alpha}3{beta}1- and/or {alpha}6{beta}4 which bind to laminin-332. Skin fibroblasts also produce CD151 mRNA. CD151-null fibroblasts migrated significantly faster on collagen I than wild type fibroblasts, confirming that they possess functional collagen receptors. However, no significant decrease in the ability of CD151-null fibroblasts to cause contraction in floating collagen gel assays in response to transforming growth factor beta-1 (TGF-{beta}1) or platelet derived growth factor (PDGF-BB) was observed, nor was there an effect on fibroblast adhesion or proliferation on collagen-I. The data implicate CD151 as a facilitator of laminin-332-mediated keratinocyte functions that impact on the re-epithelialisation process intrinsic to wound healing and further suggest a potential novel role for CD151 in fibroblast migration.

Geary, Sean M. [School of Biomedical Sciences, University of Newcastle, New South Wales (Australia); Hunter Medical Research Institute, Newcastle, New South Wales (Australia); Cowin, Allison J. [Child Health Research Institute, North Adelaide, South Australia (Australia); Department of Paediatrics, University of Adelaide, South Australia (Australia); Copeland, Ben; Baleato, Rosa M. [School of Biomedical Sciences, University of Newcastle, New South Wales (Australia); Hunter Medical Research Institute, Newcastle, New South Wales (Australia); Miyazaki, Kaoru [Division of Cell Biology, Kihara Institute for Biological Research, Yokohama City University, Yokohama (Japan); Ashman, Leonie K. [School of Biomedical Sciences, University of Newcastle, New South Wales (Australia); Hunter Medical Research Institute, Newcastle, New South Wales (Australia)], E-mail: leonie.ashman@newcastle.edu.au

2008-07-01

383

Titania-lanthanum phosphate photoactive and hydrophobic new generation catalyst  

NASA Astrophysics Data System (ADS)

Titania-lanthanum phosphate nanocomposites with multifunctional properties have been synthesized by aqueous sol-gel method. The precursor sols with varying TiO 2:LaPO 4 ratios were applied as thin coating on glass substrates in order to be transparent, hydrophobic, photocatalytically active coatings. The phase compositions of the composite powders were identified by powder X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM). The anatase phase of TiO 2 in TiO 2-LaPO 4 composite precursors was found to be stable even on annealing at 800 C. The glass substrates, coated with TL1 (TiO 2-LaPO 4 composition with 1 mol% LaPO 4) and TL50 (composite precursor containing TiO 2 and LaPO 4 with molar ratio 1:1) sols and annealed at 400 C, produced contact angles of 74 and 92, respectively, though it is only 62 for pure TiO 2 coating. The glass substrates, coated with TL50 sol, produced surfaces with relatively high roughness and uneven morphology. The TL1 material, annealed at 800 C, has shown the highest UV photoactivity with an apparent rate constant, kapp=2410 -3 min -1, which is over five times higher than that observed with standard Hombikat UV 100 ( kapp=410 -3 min -1). The photoactivity combined with a moderate contact angle (85.3) shows that this material has a promise as an efficient self-cleaning precursor.

Jyothi, Chembolli K.; Jaimy, Kanakkanmavudi B.; Ghosh, Swapankumar; Sankar, Sasidharan; Smitha, V. S.; Warrier, K. G. K.

2011-07-01

384

Enantioselective DNA condensation induced by heptameric lanthanum helical supramolecular enantiomers.  

PubMed

DNA condensation induced by a pair of heptameric La(III) helical enantiomers M-[La7(S-L)6(CO3)(NO3)6(OCH3)(CH3OH)7]2CH3OH5H2O and P-[La7(R-L)6(CO3)(NO3)6(OCH3)(CH3OH)5(H2O)2]2CH3OH4H2O (M-La and P-La, L=2-(2-hydroxybenzylamino)-3-carbamoylpropanoic acid) has been investigated by UV/vis spectroscopy, fluorescence spectroscopy, CD spectroscopy, EMSA, RALS, DLS, and SEM. The enantiomers M-La and P-La could induce CT-DNA condensation at a low concentration as observed in UV/vis spectroscopy. DNA condensates possessed globular nanoparticles with nearly homogeneous sizes in solid state determined by SEM (ca. 250nm for M-La and ca. 200nm for P-La). The enantiomers bound to DNA through electrostatic attraction and hydrogen bond interactions in a major groove, and rapidly condensed free DNA into its compact state. DNA decompaction has been acquired by using EDTA as disassembly agent, and analyzed by UV/vis spectroscopy, CD spectroscopy and EMSA. Moreover, the enantiomers M-La and P-La displayed discernible discrimination in DNA interaction and DNA condensation, as well as DNA decondensation. Our study suggested that lanthanum(III) enantiomers M-La and P-La were efficient DNA packaging agents with potential applications in gene delivery. PMID:24915440

Bao, Fei-Fei; Xu, Xin-Xin; Zhou, Wen; Pang, Chun-Yan; Li, Zaijun; Gu, Zhi-Guo

2014-09-01

385

Synthesis, characterization and the thermal decomposition of lithium tris(oxalato)lanthanum(III)nonahydrate and sodium tris(oxalato)lanthanum(III)octahydrate  

Microsoft Academic Search

Lithium tris(oxalato)lanthanum(III)nonahydrate (Li3[La(III)(C2O4)39H2O(LOL)), and sodium tris(oxalato)lanthanum(III)octahydrate (Na3[La(III)(C2O4)3]8H2O (SOL)), have been synthesized and characterized by elemental analysis, IR spectral, and X-ray powder diffraction studies. Thermal studies (TG, DTG and DTA) in air showed that LOL becomes anhydrous around 198C, followed by decomposition to Li2CO3, La2O3 and LiLaO2 at ca. 542C, via the formation of several intermediates. Finally, around 950C, the oxide

N. Deb; S. D. Baruah; N. N. Dass

1999-01-01

386

Project W-151 flexible receiver radiation detector system acceptance test plan. Revision 1  

SciTech Connect

The attached document is the Acceptance Test Plan for the portion of Project W-151 dealing with acceptance of gamma-ray detectors and associated electronics manufactured at the Idaho National Engineering Laboratory (INEL). The document provides a written basis for testing the detector system, which will take place in the 305 building (300 Area).

Troyer, G.L.

1994-12-06

387

Characterisation of pks15/1 in clinical isolates of Mycobacterium tuberculosis from Mexico  

PubMed Central

Tuberculosis (TB) is an infectocontagious respiratory disease caused by members of the Mycobacterium tuberculosis complex. A 7 base pair (bp) deletion in the locus polyketide synthase (pks)15/1 is described as polymorphic among members of the M. tuberculosis complex, enabling the identification of Euro-American, Indo-Oceanic and Asian lineages. The aim of this study was to characterise this locus in TB isolates from Mexico. One hundred twenty clinical isolates were recovered from the states of Veracruz and Estado de Mexico. We determined the nucleotide sequence of a 400 bp fragment of the locus pks15/1, while genotypic characterisation was performed by spoligotyping. One hundred and fifty isolates contained the 7 bp deletion, while five had the wild type locus. Lineages X (22%), LAM (18%) and T (17%) were the most frequent; only three (2%) of the isolates were identified as Beijing and two (1%) EAI-Manila. The wild type pks15/1 locus was observed in all Asian lineage isolates tested. Our results confirm the utility of locus pks15/1 as a molecular marker for identifying Asian lineages of the M. tuberculosis complex. This marker could be of great value in the epidemiological surveillance of TB, especially in countries like Mexico, where the prevalence of such lineages is unknown.

Zenteno-Cuevas, Roberto; Silva-Hernandez, Francisco X; Mendoza-Damian, Fabiola; Ramirez-Hernandez, Maria Dolores; Vazquez-Medina, Karen; Widrobo-Garcia, Lorena; Cuellar-Sanchez, Aremy; Muniz-Salazar, Raquel; Enciso-Moreno, Leonor; Perez-Navarro, Lucia Monserrat; Enciso-Moreno, Jose Antonio

2013-01-01

388

14 CFR 151.15 - Federal-aid Airport Program: Policy affecting runway or taxiway remarking.  

Code of Federal Regulations, 2010 CFR

...for runway or taxiway remarking if the present marking is obliterated by construction, alteration or repair work included in a FAAP project or by the required routing of construction equipment used therein. [Amdt. 151-17, 31 FR 16524, Dec. 28,...

2010-01-01

389

14 CFR 151.15 - Federal-aid Airport Program: Policy affecting runway or taxiway remarking.  

Code of Federal Regulations, 2010 CFR

...for runway or taxiway remarking if the present marking is obliterated by construction, alteration or repair work included in a FAAP project or by the required routing of construction equipment used therein. [Amdt. 151-17, 31 FR 16524, Dec. 28,...

2009-01-01

390

151. Photocopy of photograph, U.S. Army, ca. 1943 (original print ...  

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

151. Photocopy of photograph, U.S. Army, ca. 1943 (original print located at Rocky Mountain Arsenal, Commerce City, Colorado). R.M.A. - T-123 BARRACKS. - Rocky Mountain Arsenal, Bounded by Ninety-sixth Avenue & Fifty-sixth Avenue, Buckley Road, Quebec Street & Colorado Highway 2, Commerce City, Adams County, CO

391

46 CFR 160.151-15 - Design and performance of inflatable liferafts.  

Code of Federal Regulations, 2012 CFR

...withstanding the prototype tests specified in 160.151-27...differences in thermal expansion, freezing, buckling... (l) Inflation cylinders (IMO LSA Code, as...compressed-gas inflation cylinder within the liferaft must...retain the inflation cylinders in place when the...

2012-10-01

392

33 CFR 151.32 - Special areas for the purpose of Annex II.  

Code of Federal Regulations, 2013 CFR

...49, the special areas are the Baltic Sea area, the Black Sea area, and the Antarctic area which are described in...restrictions in § 151.32 for the Baltic Sea area and the Black Sea area will enter into effect when each Party to...

2013-07-01

393

hTR repressor-related gene on human chromosome 10p15.1  

PubMed Central

Somatic cells express genes that suppress telomerase activity and these genes may be inactivated in tumour cells. We postulated that cancer cells acquire immortality by activation of telomerase by the loss of such a gene. We have reported recently that a telomerase repressor gene may be located on 10p15.1 by deletion mapping using microcell-mediated chromosome transfer (MMCT), radiated microcell fusion (RMF), fluorescent in situ hybridization (FISH) and STS analysis. To independently confirm this result, we correlated expression of RNA component of telomerase (hTR) as a marker of telomerase expression by in situ hybridization with allelic loss in pulmonary carcinoid tumours. Unlike most malignant tumours, pulmonary carcinoids (which are low-grade malignant tumours) are heterogeneous for telomerase expression. Loss of 5 closely spaced polymorphic markers on 10p15.1, especially D10S1728, were highly correlated with hTR expression. In an additional experiment, 10p15.1 showed higher and more significant correlation than any region of 3p where it has been predicted as another chromosomal location of telomerase repressor with allelic loss of the region. Our findings strongly suggest that 10p15.1 harbours a gene involved in repression of telomerase RNA component in human somatic cells and each putative repressor (on 3p and 10p) may act independently. 2001 Cancer Research Campaign ??http://www.bjcancer.com

Miura, N; Onuki, N; Rathi, A; Virmani, A; Nakamoto, S; Kishimoto, Y; Murawaki, Y; Kawasaki, H; Hasegawa, J; Oshimura, M; Travis, W D; Gazdar, A F

2001-01-01

394

19 CFR 151.73 - Importer's request for commercial laboratory test.  

Code of Federal Regulations, 2013 CFR

...AND TESTING OF MERCHANDISE Wool and Hair § 151.73 Importer's request for...the percentage clean yield of the wool or hair. (b) Time for filing request...representative quantity of the wool or hair in dispute to be selected and...

2013-04-01

395

19 CFR 151.68 - Merchandise to be sampled and tested by Customs.  

Code of Federal Regulations, 2013 CFR

...AND TESTING OF MERCHANDISE Wool and Hair § 151.68 Merchandise to be sampled...feasible: (a) All importation of wool or hair subject to duty at a rate per clean...1311); (b) All imported wool or hair manipulated under the provisions of...

2013-04-01

396

50 CFR 217.151 - Specified activity and specified geographical region.  

Code of Federal Regulations, 2011 CFR

...Operation of a Liquefied Natural Gas Deepwater Port in the Gulf of Mexico § 217.151 Specified activity and specified geographical...vicinity of the Port Dolphin Deepwater Port in the eastern Gulf of Mexico or along the associated pipeline...

2013-10-01

397

30 CFR 75.151 - Tests for methane; qualified person; additional requirement.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Tests for methane; qualified person; additional requirement...Certified Persons § 75.151 Tests for methane; qualified person; additional requirement...shall be a qualified person for testing for methane unless he demonstrates to the...

2013-07-01

398

Structural characterization and properties of lanthanum film as chromate replacement for tinplate  

NASA Astrophysics Data System (ADS)

Sulfide-stain resistance of La-passivated, unpassivated and Cr-passivated tinplate was measured using a cysteine tarnish test. Corrosion behavior of these tinplates was investigated using electrochemical impedance spectroscopy (EIS) measurement. The morphology, composition and thickness of lanthanum film were studied by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and X-ray fluorescence spectrometry (XRF), respectively. La-passivation treatment remarkably enhances sulfide-stain resistance of tinplate, and sulfide-stain resistance of La-passivated tinplate is slightly higher than that of Cr-passivated tinplate. La-passivation treatment also significantly improves corrosion protection property of tinplate. In contact with 3.5% NaCl solution, corrosion resistance of La-passivated tinplate is close to that of Cr-passivated tinplate, and in contact with 0.1 M citric-citrate buffer solution, corrosion resistance of La-passivated tinplate is higher than that of Cr-passivated tinplate. Lanthanum film is composed of spherical particles about 50-1000 nm in diameter, while most part of tinplate's surface is covered with the small particles about 50-200 nm. The film mainly consists of lanthanum and oxygen, which mainly exist as La 2O 3 and its hydrates such as La(OH) 3 and LaOOH. The amount of lanthanum in the film is about 0.0409 g/m 2.

Huang, Xingqiao; Li, Ning

2007-12-01

399

Spacecraft Charging Control by Thermal, Field Emission with Lanthanum-Hexaboride Emitters.  

National Technical Information Service (NTIS)

Thermal, field emitters of lanthanum (or perhaps cerium) hexaboride (LaB6) with temperature variability up to about 1500K are suggested for spacecraft charging control. Such emitters operate at much lower voltages with considerably more control and add pl...

J. F. Morris

1978-01-01

400

Effect of Lanthanum on Nodule Count and Nodularity of Ductile Iron  

Microsoft Academic Search

The present study aims at finding out the effect of the addition of a single rare earth element, that is, lanthanum on the nodularity and nodule count of ductile iron under controlled conditions. For this purpose, four melts with different compositions were made, using a 28 kg inductotherm medium frequency induction furnace. The temperature was carefully maintained between 1400 and

M. Ashraf Sheikh; Javed Iqbal

2007-01-01

401

Fixation of lanthanum cation by natural bentonite in nitric media. Part I : Equilibrium study.  

National Technical Information Service (NTIS)

The present work deals with the study of lanthanum fixation from aqueous solution by a mineral ion exchanger. The main purpose of the work consists in investigating the opportunity of the use of natural clays and miscellaneous other materials in the rare ...

A. Azzouz S. Chegrouche S. Telmoune

1993-01-01

402

Surface Phonon Dispersion in Graphite and its Modification Under Interaction with Lanthanum  

Microsoft Academic Search

Using high resolution electron energy loss spectroscopy (HREELS) the surface phonon dispersion of graphite has been determined in the Gamma K direction over the whole energy range and the whole Brillouin zone. By depositing lanthanum and annealing we prepared a GIC-like phase which grows on top of an intermediate carbide. The phonon dispersion of this phase shows the same modes

Susanne Siebentritt; Roland Pues; Karl-Heinz Rieder; Alexander M. Shikin

1998-01-01

403

Modification of the sulfur dioxide-iodine thermochemical hydrogen cycle with lanthanum sulfites and sulfates  

Microsoft Academic Search

Variable composition, insoluble dilanthanum oxide-sulfite-sulfate-hydrates were prepared by reaction of lanthanum dioxymonosulfate with aqueous sulfur dioxide. These compositions reacted with iodine to yield sulfate in the solid phase, and hydrogen iodide and water in the gas phase. The highest yield of hydrogen iodide measured was 32% at 660 K for a few seconds reaction time of iodine with a reactant

E. I. Onstott; M. G. Bowman; M. F. Michnovicz; C. M. Hollabaugh

1984-01-01

404

Investigation of the thermal conductivity of selected compounds of lanthanum, samarium and europium  

Microsoft Academic Search

As part of the development of rare earth based ceramic materials for a variety of applications, the thermal conductivities of lanthanum aluminate, samarium zirconate and europium zirconate were investigated, employing the laser flash technique and covering a temperature range from 6501400 K. Based on the variation of the thermal resistivity as a function of temperature, the heat transport behaviour of

Girija Suresh; G Seenivasan; M. V Krishnaiah; P. Srirama Murti

1998-01-01

405

Laser-induced electron emission from tungsten, tantalum and lanthanum hexaboride using ruby and argon lasers  

Microsoft Academic Search

A description is given of experiments carried out using pulsed ruby and argon lasers to investigate the possibility of producing pulses of high electron emission current densities from tantalum, tungsten and lanthanum hexaboride cathodes heated by a focused laser beam. Current densities as high as 104 A cm?2 were recorded using the ruby laser but subsequently it was shown, using

L G Pittaway; J Smith; E D Fletcher; B W Nicholls

1968-01-01

406

Lanthanum Inhibition of 45Ca Efflux from the Squid Giant Axon  

Microsoft Academic Search

LETTVIN et al.1 predicted that lanthanum ions, because of their relatively small size and high charge density, should have a much greater electrostatic attraction for any negative calcium binding site than calcium ions themselves. This was borne out for the membranes of the barnacle muscle fibres2 and the lobster axon3. If negatively charged sites located in the membrane also serve

C. van Breemen

1970-01-01

407

Determination of zirconium, barium, lanthanum, aluminium, sodium, hafnium and fluorine in fluorozirconate glasses  

Microsoft Academic Search

A procedure is described for the determination of the cationic and anionic components in fluorozirconate glasses. Zirconium, barium, aluminium, lanthanum, sodium and hafnium were determined by inductively coupled plasma atomic emission spectrometry (ICP\\/AES) after dissolution of the sample with an acid mixture in a microwave oven. The fluorine content was evaluated with two different techniques, namely potentiometry with a fluoride

O. Abollino; E. Mentasti; C. Sarzanini; E. Modone; M. Braglia

1992-01-01

408

Spacecraft charging control by thermal, field emission with lanthanum-hexaboride emitters  

NASA Technical Reports Server (NTRS)

Thermal, field emitters of lanthanum (or perhaps cerium) hexaboride (LaB6) with temperature variability up to about 1500K are suggested for spacecraft charging control. Such emitters operate at much lower voltages with considerably more control and add plasma-diagnostic versatility. These gains should outweigh the additional complexity of providing heat for the LaB6 thermal, field emitter.

Morris, J. F.

1978-01-01

409

Propagation of surface plasmon polariton in the single interface of gallium lanthanum sulfide and silver  

NASA Astrophysics Data System (ADS)

The propagation characteristics of the surface-plasmon-polariton (SPP) mode in the single interface of silver (Ag) and gallium lanthanum sulfide (GLS) have been studied both analytically and numerically. The obtained numerical results show an excellent agreement with the analytical ones. The locations of the spatial resonance point along the direction of propagation were determined for the dielectric and the metal.

Sagor, Rakibul Hasan; Saber, Md. Ghulam; Amin, Md. Ruhul

2014-03-01

410

Phosphate starvation as an antimicrobial strategy: the controllable toxicity of lanthanum oxide nanoparticles.  

PubMed

Lanthanum oxide nanoparticles were utilized to scavenge phosphate from microbial growth media for the use of targeted nutrient starvation as an antimicrobial strategy. Only in phosphate poor environments a toxic effect was observed. The effect was shown on Escherichia coli, Staphylococcus carnosus, Penicillium roqueforti, and Chlorella vulgaris. PMID:22410707

Gerber, Lukas C; Moser, Nadine; Luechinger, Norman A; Stark, Wendelin J; Grass, Robert N

2012-04-21

411

A new cold cathode using pulsed laser deposited lanthanum monosulfide thin films  

Microsoft Academic Search

Using MEMS technology, an array of cold cathodes was fabricated by pulsed laser deposition (PLD) of chemically and thermally stable lanthanum monosulfide (LaS) thin film anode and cathode contacts. The latter were defined via etching and processing of two different pieces of (100) Si wafers separated via a highly resistive sputter deposited aluminum nitride (AlN) layer whose thickness was used

M. Samiee; K. Garre; M. Cahay; P. B. Kosel; S. Fairchild; J. W. Fraser; D. J. Lockwood

2007-01-01

412

Lanthanum chromite-based materials for solid oxide fuel cell interconnects  

Microsoft Academic Search

One of the challenges for advancing solid oxide fuel cell (SOFC) technology is the development of interconnect materials with adequate conductivity and stability for efficient long-term use. One of the most promising interconnect materials is doped lanthanum chromite, which has good conductivity at high temperatures and is stable in oxidizing and reducing atmospheres. In this paper, the effects of strontium,

Jeffrey W. Fergus

2004-01-01

413

Tem Study of Phase and Domain Structures of Lanthanum Aluminate Arising from Phase Transitions.  

National Technical Information Service (NTIS)

The phase and domain structures of Lanthanum Aluminate arising from phase transitions have been studied carefully after the recent finding that the space group of a well annealed crystal, determined by convergent-beam electron diffraction, is Fm(3 bar)c, ...

Y. Yang Y. C. Chang C. Y. Yang Y. Q. Zhou K. K. Fung

1992-01-01

414

Characterization of Novel Cutaneous Human Papillomavirus Genotypes HPV-150 and HPV-151  

PubMed Central

DNA from two novel HPV genotypes, HPV-150 and HPV-151, isolated from hair follicles of immuno-competent individuals, was fully cloned, sequenced and characterized. The complete genomes of HPV-150 and HPV-151 are 7,436-bp and 7,386-bp in length, respectively. Both contain genes for at least six proteins, namely E6, E7, E1, E2, L2, L1, as well as a non-coding upstream regulatory region located between the L1 and E6 genes: spanning 416-bp in HPV-150 (genomic positions 7,371 to 350) and 322-bp in HPV-151 (genomic positions 7,213 to 148). HPV-150 and HPV-151 are phylogenetically placed within the Betapapillomavirus genus and are most closely related to HPV-96 and HPV-22, respectively. As in other members of this genus, the intergenic E2-L2 region is very short and does not encode for an E5 gene. Both genotypes contain typical zinc binding domains in their E6 and E7 proteins, but HPV-151 lacks the regular pRb-binding core sequence within its E7 protein. In order to assess the tissue predilection and clinical significance of the novel genotypes, quantitative type-specific real-time PCR assays were developed. The 95% detection limits of the HPV-150 and HPV-151 assays were 7.3 copies/reaction (range 5.6 to 11.4) and 3.4 copies/reaction (range 2.5 to 6.0), respectively. Testing of a representative collection of HPV-associated mucosal and cutaneous benign and malignant neoplasms and hair follicles (total of 540 samples) revealed that HPV-150 and HPV-151 are relatively rare genotypes with a cutaneous tropism. Both genotypes were found in sporadic cases of common warts and SCC and BCC of the skin as single or multiple infections usually with low viral loads. HPV-150 can establish persistent infection of hair follicles in immuno-competent individuals. A partial L1 sequence of a putative novel HPV genotype, related to HPV-150, was identified in a squamous cell carcinoma of the skin obtained from a 64-year old immuno-compromised male patient.

Kovanda, Anja; Kocjan, Bostjan J.; Luzar, Bostjan; Bravo, Ignacio G.; Poljak, Mario

2011-01-01

415

Corrective Action Plan for Corrective Action Unit 151: Septic Systems and Discharge Area, Nevada Test Site, Nevada  

SciTech Connect

Corrective Action Unit (CAU) 151, Septic Systems and Discharge Area, is listed in the Federal Facility Agreement and Consent Order (FFACO) of 1996 (FFACO, 1996). CAU 151 consists of eight Corrective Action Sites (CASs) located in Areas 2, 12, and 18 of the Nevada Test Site (NTS), which is located approximately 65 miles northwest of Las Vegas, Nevada.

NSTec Environmental Restoration

2007-03-01

416

33 CFR 151.66 - Operating requirements: Discharge of garbage in the Great Lakes and other navigable waters.  

Code of Federal Regulations, 2011 CFR

33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false...garbage in the Great Lakes and other navigable waters. 151.66 Section 151.66 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2011-07-01

417

33 CFR 151.66 - Operating requirements: Discharge of garbage in the Great Lakes and other navigable waters.  

Code of Federal Regulations, 2012 CFR

33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false...garbage in the Great Lakes and other navigable waters. 151.66 Section 151.66 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2012-07-01

418

33 CFR 151.66 - Operating requirements: Discharge of garbage in the Great Lakes and other navigable waters.  

Code of Federal Regulations, 2010 CFR

33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false...garbage in the Great Lakes and other navigable waters. 151.66 Section 151.66 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND...

2010-07-01

419

REFOS study: efficacy and safety of lanthanum carbonate in clinical practice in Spain.  

PubMed

Lanthanum carbonate is a powerful phosphate binder that has shown efficacy and safety in clinical trials for hyperphosphataemia management, although there are few data in regular clinical practice. The study's objective was to evaluate, in regular clinical practice, its efficacy and safety in patients on dialysis. We retrospectively collected data from 15 months of monitoring, corresponding to 3 months prior to the start of treatment with lanthanum carbonate until 12 months after the start. Results included values of serum calcium, phosphorus, alkaline phosphatase, iPTH, hepatic enzymes and haemogram, as well as the daily-prescribed dose of lanthanum carbonate, the concomitant medication, treatment compliance and adverse events. 647 patients were included of which 522 completed the study. Abandonment, for the most part, was due to gastrointestinal disorders (26%) and hypophosphatemia (19%). Serum phosphorus decreased from 6.41.7 mg/dl (start) to 4.91.4 mg/dl (12 months) (P<.001). At the end of the monitoring period, 47% were within the desired phosphorus range (3.5-5mg/dl). There were no significant variations in the remaining parameters. Initial dose of lanthanum carbonate: 1900 mg/day; and end dose: 2300 mg/day. The variables independently associated with phosphataemia were baseline serum phosphorus and treatment compliance. In relation to safety, we observed 238 slight or moderate adverse effects in 117 patients, with 88% linked to gastrointestinal abnormalities. In conclusion, lanthanum carbonate reduces the serum phosphorus values in patients on dialysis with a good safety profile and acceptable adherence to that profile, with gastrointestinal disorders being the most frequent adverse effect. PMID:24849057

Torregrosa, Jos-Vicente; Gonzlez-Parra, Emilio; Gonzlez, M Teresa; Cannata-Anda, Jorge

2014-05-21

420

Electrical properties of lanthanum chromite based ceramics in hydrogen and oxidizing atmospheres at high temperatures. Final report  

SciTech Connect

Several results regarding the effect of hydrogen on lanthanum chromite were determined. Thermally-activated diffusion of hydrogen through La(Mg)CrO/sub 3/ was found with a high activation energy. It was found that its electrical conductivity drops drastically, especially at low temperature, after exposure to hydrogen at high temperature. Also, the curvature of most of the conductivity plots, as well as the inability to observe the Hall effect, lends support to the proposal by Karim and Aldred that the small-polaron model which predicts thermally activated mobility is applicable to doped lanthanum chromite. From differential thermal analysis an apparent absorption of hydrogen near 300/sup 0/C was noticed. Upon cooling the lanthanum chromite in hydrogen and subsequently reheating it in air, desorption occurred near 170/sup 0/C. The immediate purpose of this study was to determine whether hydrogen has a deleterious effect on lanthanum chromite in solid oxide fuel cells.

Schmidt, V.H.

1981-06-01

421

Beam-hardening artifacts on computed tomography images caused by lanthanum carbonate hydrate in a patient on dialysis.  

PubMed

Lanthanum carbonate hydrate is a nonaluminum, noncalcium phosphate binder containing lanthanum (La). It is effective in decreasing the serum phosphate level in patients on dialysis. Because the atomic number of the La contained in lanthanum carbonate hydrate is relatively high, at 57, this agent may cause strong artifacts on computed tomography (CT) images, which may be mistakenly interpreted as foreign bodies. We recently performed CT examination of a patient on Fosrenol chewable tablets (i.e., lanthanum carbonate hydrate). The CT images were difficult to evaluate because of strong beam hardening artifacts, and differentiation from foreign body aspiration was required. We report here our experience and a discussion of the characteristics of this artifact. PMID:20512553

Hayashi, Hiromitsu; Machida, Minoru; Sekine, Tetsuro; Yamaguchi, Hidenori; Kiriyama, Tomonari; Kumita, Shin-Ichiro

2010-05-01

422

A multicenter study on the effects of lanthanum carbonate (Fosrenol) and calcium carbonate on renal bone disease in dialysis patients  

Microsoft Academic Search

A multicenter study on the affects of lanthanum carbonate (Fosrenol) and calcium carbonate on renal bone disease in dialysis patients.BackgroundLanthanum carbonate (LC) (Fosrenol) is a novel new treatment for hyperphosphatemia. In this phase III, open-label study, we compared the effects of LC and calcium carbonate (CC) on the evolution of renal osteodystrophy (ROD) in dialysis patients.MethodsNinety-eight patients were randomized to

Patrick C. D'Haese; Goce B. Spasovski; Aleksander Sikole; Alastair Hutchison; Tony J. Freemont; Sylvie Sulkova; Charles Swanepoel; Svetlana Pejanovic; Llubica Djukanovic; Alessandro Balducci; Giorgio Coen; Waldysaw Sulowicz; Anibal Ferreira; Armando Torres; Slobodan Curic; Milan Popovic; Nada Dimkovic; Marc E. De Broe

2003-01-01

423

Effect of a-site cation deficiency and YSZ additions on sintering and properties of doped lanthanum manganite  

SciTech Connect

The sintering behavior of Ca- and Sr-doped lanthanum manganite (the preferred SOFC cathode material) is highly dependent on the relative proportion of A and B site cations in the material. In general, A-site cation deficiency increases sintered density. The effect of additions of YSZ to lanthanum manganite (to expand the reactive region at the cathode/electrolyte interface and improve thermal expansion and sintering shrinkage matches) on sintering and other properties will also be reported.

Stevenson, J.W.; Armstrong, T.R.; Weber, W.J.

1995-06-01

424

Phase equilibrium and preparation, crystallization and viscous sintering of glass in the alumina-silica-lanthanum phosphate system  

Microsoft Academic Search

The phase equilibrium, viscosity of melt-quenched glasses, and processing of sol-gel glasses of the alumina-silica-lanthanum phosphate system were studied. These investigations were directed towards serving the objective of synthesizing nano-structured ceramic-matrix-composites via controlled crystallization of glass precursors. The thermal stability, phase equilibrium, and liquidus temperatures of the alumina- and mullite-lanthanum phosphate systems are determined. An iridium wire heater was constructed

Feng He

2009-01-01

425

The effect of lanthanum on the fabrication of ZrB 2ZrC composites by spark plasma sintering  

Microsoft Academic Search

The effect of the addition of the rare earth element, lanthanum, on the sintering characteristics of ZrB2ZrC composites has been analyzed during a spark plasma sintering (SPS) process. Microscopic observation confirmed that lanthanum accelerated mass transport by the formation of the liquid phase between the particles induced by the spark plasma in the initial stage of the SPS process, and

Kyoung Hun Kim; Kwang Bo Shim

2003-01-01

426

Tape casting and sintering of strontium-doped lanthanum chromite for a planar solid oxide fuel cell bipolar plate  

Microsoft Academic Search

Nonagglomerated strontium-doped lanthanum chromite powders were prepared by a modified Pechini resinintermediate process and tape cast to form bipolar plates for a planar solid oxide fuel cell. An air-sintering technique for the strontium-doped lanthanum chromite was developed, which involved placing the green tape between CrO-fired plates. The sintering process was found to be diffusion controlled, with densification beginning at the

Lone-Wen Tai; Paul A. Lessing

1991-01-01

427

Cytotoxic activity of new lanthanum (III) complexes of bis-coumarins.  

PubMed

Complexes of lanthanum (III) with bis-coumarins: bis(4-hydroxy-2-oxo-2H-chromen-3-yl)-piridin-2-yl-methane; bis(4-hydroxy-2-oxo-2H-chromen-3-yl)-piridin-3-yl-methane and bis(4-hydroxy-2-oxo-2H-chromen-3-yl)-piridin-4-yl-methane were synthesized by reaction of lanthanum (III) salt and the ligands, in amounts equal to metal/ligand molar ratio of 1:2. The complexes were prepared by adding an aqueous solution of lanthanum (III) salt to an aqueous solution of the ligand subsequently raising the pH of the mixture gradually to ca. 5.0 by adding dilute solution of sodium hydroxide. The lanthanum (III) complexes with bis-coumarins were characterized by different physicochemical methods-elemental analysis, IR-, (1)H- and 13C-NMR spectroscopies and mass-spectral data. The spectral data of lanthanum (III) complexes were interpreted on the basis of comparison with the spectra of the free ligands. This analysis showed that in the La (III) complexes the ligands coordinated to the metal ion through both deprotonated hydroxyl groups. On the basis of the nu(C=O) red shift observed, participation of the carbonyl groups in the coordination to the metal ion was also suggested. Cytotoxic screening by MTT assay was carried out. In the present study, we performed comparative evaluation of the cytotoxic effects of the three newly synthesized lanthanum complexes against the acute myeloid leukemia derived HL-60 and the chronic myeloid leukemia (CML)-derived BV-173. In addition the cytotoxic effects of La (III) complex with bis(4-hydroxy-2-oxo-2H-chromen-3-yl)-piridin-2-yl-methane were evaluated on the SKW-3 cells. In order to elucidate some of the mechanistic aspects of the observed cytotoxic effects we evaluated the ability of this complex to trigger programmed cell death (apoptosis by means of agarose gel electrophoretic analysis of DNA), isolated from the cytosolic fraction of treated SKW-3 cells. In addition, microscopic morphological evaluation of the treated cells was carried out in order to establish morphological features indicative for programmed cell death. PMID:15922838

Kostova, Irena; Momekov, Georgi; Zaharieva, Maya; Karaivanova, Margarita

2005-06-01

428

Isolation and expression analysis of a novel major latex-like protein (MLP151) gene from Panax ginseng.  

PubMed

This is the first reports on isolation and expression analysis of a major latex-like protein (MLP151) gene in Panax ginseng C.A. Meyer. A full-length cDNA of MLP151 was 850 bp and contained a 456 bp open reading frame encoding a polypeptide of 151 amino acids. A theoretical pI value of MLP151 was 4.86 and calculated molecular weight was about 16.87 kDa. The MLP homolog proteins are found in various plants and the neighbor-joining analysis revealed that MLP151 has the closest distance with Sn-1 (bell pepper, MLP homolog gene). We analyzed the expression of MLP151 in different levels in various organs of ginseng and plantlet. In the result, the gene was low expressed in plantlet. We treated the ginseng plantlets with nine kinds of different stresses and analyzed the expression profile of MLP151. Transcript levels were significantly induced by stress treatment of light and mannitol, whereas transcript levels were drastically decreased in dark, H(2)O(2), salicylic acid and wounding samples. PMID:19680785

Sun, Hua; Kim, Myung-Kyum; Pulla, Rama Krishna; Kim, Yu-Jin; Yang, Deok-Chun

2010-06-01

429

Encapsulation of Coumarin 151 into the mesopores of modified rodlike SBA-15  

SciTech Connect

Dye Coumarin 151 was postgrafted into the rodlike SBA-15 mesoporous materials, which were synthesized by a direct hydrothermal synthesis method and further modified by an organic silane with a terminal amino group. Characterization by powder X-ray diffraction, N{sub 2} adsorption-desorption, transmission electron microscopy, photoluminescence and scanning electron microscopy were carried out. Small-angle X-ray diffraction and N{sub 2} adsorption-desorption characterizations showed that these dye containing materials remained as ordered mesostructures and the pore size was from 6 nm for blank sample to 3.6 nm for postgrafting sample. PL characterization of composite samples exhibited optical properties with different dye concentrations. The characterization showed the existence of Coumarin 151 in the channels of SBA-15 and the composite materials with novel optical properties enabled possible applications in optical sensing and electron acceptors.

Guli, Mina [Department of Material Science and Engineering, Key Laboratory of Automobile Materials of Ministry of Education, Jilin University, Changchun, 130012 (China)] [Department of Material Science and Engineering, Key Laboratory of Automobile Materials of Ministry of Education, Jilin University, Changchun, 130012 (China); Li, Xiaotian, E-mail: xiaotianli@jlu.edu.cn [Department of Material Science and Engineering, Key Laboratory of Automobile Materials of Ministry of Education, Jilin University, Changchun, 130012 (China)] [Department of Material Science and Engineering, Key Laboratory of Automobile Materials of Ministry of Education, Jilin University, Changchun, 130012 (China); Chen, Yue; Ding, Hong; Li, Jixue; Qiu, Shilun [State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012 (China)] [State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012 (China)

2010-01-15

430

Test report for run-in acceptance testing of Project W-151 300 HP mixing pumps  

SciTech Connect

This report documents the results of a performance demonstration and operational checkout of three 300 HP mixer pumps in accordance with WHC-SD-WI51-TS-001 ``Mixer Pump Test Specification for Project W-151`` and Statement of Work 8K520-EMN-95-004 ``Mixer Pump Performance Demonstration at MASF`` in the 400 Area Maintenance and Storage Facility (MASF) building. Testing of the pumps was performed by Fast Flux Test Facility (FFTF) Engineering and funded by the Tank Waste Remediation System (TWRS) Project W-151. Testing began with the first pump on 04-01-95 and ended with the third pump on 11-01-96. Prior to testing, the MASF was modified and prepared to meet the pump testing requirements set forth by the Test Specification and the Statement of Work.

Berglin, B.G.

1998-01-29

431

Magnetism under high pressure studied by 57Fe and 151Eu nuclear scattering of synchrotron radiation  

NASA Astrophysics Data System (ADS)

The nuclear forward scattering (NFS) of synchrotron radiation is especially suited for probing magnetism at very high pressure, here in the Mbar range, by the nuclear resonances of 57Fe and 151Eu. We report on high pressure (h.p.) NFS studies with the 14.4 keV transition of 57Fe on magnetic RFe2 Laves phases of cubic C15 structure (YFe2, GdFe2) and hexagonal C14 structure (ScFe2, TiFe2) at pressures up to 100 GPa (=1 Mbar). We present also h.p. NFS studies performed with the 21.5 keV resonance of 151Eu, probing the magnetism in the CsCl-type h.p. phase of EuTe.

Lbbers, R.; Pleines, M.; Hesse, H.-J.; Wortmann, G.; Grnsteudel, H. F.; Rffer, R.; Leupold, O.; Zukrowski, J.

1999-09-01

432

Fission of 242Pu with 15.1-MeV neutrons  

NASA Astrophysics Data System (ADS)

The mass-yield distribution from the fission of 242Pu induced by 15.1-MeV neutrons was measured. Yields were measured for 65 fission products from 85Kr to 151Pm. From these data the total chain yields for 43 mass numbers were obtained and the mass-yield curve constructed. Fission product activities were measured by Ge(Li) ?-ray spectrometry of the irradiated 242Pu target and by chemical separation of the fission product elements Pd, Ag, Cd, Sn, Sb, and Ce followed by ? counting or ?-ray spectrometry. The peak-to-valley ratio in the mass-yield distribution is about 9.5. The average masses of the light and heavy groups are 101.5 and 136.5, respectively.

Winkelmann, I.; Aumann, D. C.

1984-09-01

433

hTR repressor-related gene on human chromosome 10p15.1  

Microsoft Academic Search

Somatic cells express genes that suppress telomerase activity and these genes may be inactivated in tumour cells. We postulated that cancer cells acquire immortality by activation of telomerase by the loss of such a gene. We have reported recently that a telomerase repressor gene may be located on 10p15.1 by deletion mapping using microcell-mediated chromosome transfer (MMCT), radiated microcell fusion

N Miura; N Onuki; A Rathi; A Virmani; S Nakamoto; Y Kishimoto; Y Murawaki; H Kawasaki; J Hasegawa; M Oshimura; W D Travis; A F Gazdar

2001-01-01

434

1.51GHz nanocrystalline diamond micromechanical disk resonator with material-mismatched isolating support  

Microsoft Academic Search

The first CVD nanocrystalline diamond micromechanical disk resonator with material-mismatched stem has been demonstrated at a record frequency of 1.51 GHz with an impressive Q of 11,555, which is more than 7X higher than demonstrated in a previous 1.14-GHz polysilicon disk resonator, and which achieves a frequency-Q product of 1.741013 that now exceeds the 11013 of some of the best

Jing Wang; Jarnes E. Butler; Tatyana Feygelson; Clark T.-C. Nguyen

2004-01-01

435

Low-energy level structure of 151Sm by neutron capture reactions and theoretical interpretation  

Microsoft Academic Search

A nuclear structure study of 151Sm is presented on the basis of low-energy gamma-ray and conversion electron spectroscopy, in connection with thermal neutron capture, and high-energy primary gamma-ray measurements following average resonance neutron capture. The level scheme is established up to 1020 keV and incorporates 44 levels. Unique spin and parity assignments are made for 34 levels, and narrow limits

G. Vandenput; P. H. M. van Assche; L. Jacobs; J. M. van den Cruyce; R. K. Smither; K. Schreckenbach; T. von Egidy; D. Breitig; H. A. Baader; H. R. Koch

1986-01-01

436

Electron Capture Probability in the Decay of Gadolinium -151 and TUNGSTEN-181.  

NASA Astrophysics Data System (ADS)

The L-electron capture probability P(,L) during the decay of ('151)Gd to 349.8 keV level in ('151)Eu is measured to be (0.222 (+OR-) 0.0185) by observing ('151)Eu L x rays in coincidence with 153.6 keV gamma rays using Si(Li) and Ge(Li) detectors. This value is in agreement with the theoretical value of 0.21. The probability of K-electron capture P(,K) in the decay of ('181)W to 136.3 and 158.7 keV levels in ('181)Ta are measured to be 0.149 (+OR-) 0.013 and 0.068 (+OR-) 0.100 respectively. The L-electron capture probabilities are measured to be 0.57 (+OR-) 0.064 and 0.609 (+OR-) 0.079 in the decay to the levels at 136.3 keV and 158.7 keV levels respectively. An average value of 229 (+OR-) 15 keV for Q(,EC) is deduced from these experimental capture probabilities.

Khalaff, Mansour Mussbah

437

Separation of lanthanum(III) and neodymium(III) by extraction with tributyl phosphate in the presence of a solid phase  

SciTech Connect

Lanthanum(III) and neodymium(III) extraction from nitric acid solutions with tributyl phosphate in the presence of a solid phase has been studied. The coefficient of neodymium nitrate distribution ..cap alpha.. in presence of solid phase has been found to increase with decrease of its concentration in the original solution and increase of lanthanum nitrate concentration. Separation is most pronounced in the neodymium nitrate microregion. A procedure has been proposed for quantitative neodymium extraction form lanthanum nitrate solutions with a neodymium and lanthanum separation coefficient higher than 25.

Korotkevich, I.B.; Kolesnikov, A.A.; Bomshtein, V.E.; Shikhaleeva, N.N.

1987-01-01

438

Thermoluminescent dosimetric characteristics of irradiated ternary alkali halides doped with lanthanum  

NASA Astrophysics Data System (ADS)

In the present study thermoluminesce properties of Lanthanum doped KCl0.2NaClxNaBr0.8-x ternary crystals with ? - irradiation has been carried out. The crystals were grown by slow evaporation and doped with rare earth Lanthanum ion. The grown crystals were irradiated with ? - radiation for dosages of 25 kGy, 50 kGy and 100 kGy. The results show that TL intensity as well as the peak position of the glow curves change with time of exposure. In few compositions, there is no change in intensity with time whereas; in few other compositions there is a small fading of intensity with time. Study reveals that these crystals have high capacity to store optical energy.

Maruthi, G.; Chandramani, R.

2013-02-01

439

Lanthanum(III)-catalyzed degradation of cellulose at 250 degrees C.  

PubMed

Lanthanum(III) chloride was found to effectively catalyze the degradation of cellulose in water at 250 degrees C. The degradation conversion of cellulose in the presence of a catalytic amount of lanthanum chloride reached 80.3% after 180 s, which corresponded to the turnover number of 83, whereas the reaction did scarcely proceed in the absence of the catalyst. The degradation products were separately quantified as water-soluble (WS), methanol-soluble (MS), methanol-insoluble (MI), and gaseous (G) products. The HPLC and GC analyses revealed that the WS materials are mainly composed of 5-hydroxymethyl-2-furaldehyde (HMF), D-glucose, and levulinic acid. Cellobiose, the disaccharide component of cellulose, was scarcely detected during the reaction. PMID:11800491

Seri, Kei-ichi; Sakaki, Tsuyoshi; Shibata, Masao; Inoue, Yoshihisa; Ishida, Hitoshi

2002-02-01

440

High-efficiency, low-temperature cesium diodes with lanthanum-hexaboride electrodes  

NASA Technical Reports Server (NTRS)

Lanthanum-hexaboride electrodes in 1700 K cesium diodes may triple power outputs compared with those demonstrated for nuclear thermionic space applications. Still greater relative gains seem possible for emitters below 1700 K. Further improvements in cesium-diode performance should result from the lower collector temperatures allowed for earth and low-power-space duties. Decreased temperatures will lessen thermal-transport losses that attend thermionic-conversion mechanisms. Such advantages will add to those from collector-Carnot and electrode effects. If plasma ignition difficulties impede diode temperature reductions, recycling small fractions of the output power could provide ionization. So high-efficiency, low-temperature cesium diodes with lanthanum-hexaboride electrodes appear feasible.

Morris, J. F.

1974-01-01

441

Simultaneous determination of lanthanum and europium by higher order derivative molecular absorption spectrophotometry  

SciTech Connect

The identical properties of rare earth elements towards reaction with various chromogenic reagents in molecular absorption spectrophotometry (MAS) leads to a requirement for the development of procedures with greater selectivity. One way of solving this problem is by utilizing derivative spectroscopy, where the composite spectrum is transformed to the second or higher order derivative in wavelength domain. This paper reports the utilization of higher order derivative spectrophotometry for the simultaneous determination of lanthanum and europium. The developed procedure is simple, reliable and allows the determination of as low as 100 and 10 ppb of lanthanum and europium, respectively. Similar methodology can be adopted for the simultaneous determination of two or more of any closely related analytes by proper choice of derivative order in addition to selecting a suitable chromogenic reagent, pH and masking agents.

Rao, T.P.; Sukumar, R.

1986-01-01

442

Oxidation of toluene on lanthanum cobaltite perovskite (LaCoO 3 ) catalyst  

Microsoft Academic Search

Vapor phase oxidation of toluene to benzaldehyde has been studied on lanthanum cobaltite, LaCoO3, with a perovskite structure. Experimental data were obtained in the temperature range 350 to 600C and contact time 0.2 to 2 h. The overall kinetic analysis indicated the oxidation of toluene to benzaldehyde to be first order, with a frequency factor of 0.62 h?1 and an

K. L. Madhok

1986-01-01

443

Sol-Gel Route to Porous Lanthanum Cobaltite (LaCoO3) Thin Films  

Microsoft Academic Search

Sol- gel-derived LaCoO3 thin films were deposited on yttria- stabilized zirconia (YSZ) substrates from a lanthanum iso- propoxide- cobalt acetate (with 2-methoxyethanol) precursor solution. A chelating agent (2-ethylacetoacetate) and polyeth- ylene glycol (PEG) were used to modify the above-mentioned precursor solution. The La-Co precursor solution was suffi- ciently viscous, and transparent LaCoO3 gel films were pre- pared successfully using a

Hae Jin Hwang; Jooho Moon; Masanobu Awano; Kunihiko Maeda

2004-01-01

444

Synthesis of lanthanum cobaltite (LaCoO 3) by the polymerizable complex route  

Microsoft Academic Search

We report a simple technique for preparation of lanthanum cobaltite LaCoO3 powders by the polymerizable complex (PC) method based on the Pechini-type reaction route. A mixed solution of citric acid (CA) and ethylene glycol (EG) with La and Co ions was polymerized. The final materials obtained by the polyesterification between CA and EG were compared with those obtained by the

Monica Popa; Masato Kakihana

2002-01-01

445

Intermediate temperature solid oxide fuel cell based on lanthanum gallate electrolyte  

Microsoft Academic Search

The Kansai Electric Power Co. Inc. (KEPCO) and Mitsubishi Materials Corporation (MMC) have been developing intermediate temperature solid oxide fuel cells (IT-SOFCs) which are operable at a temperature range between 600 and 800C. There are some significant features in IT-SOFC of KEPCOMMC: (1) highly conductive lanthanum gallate-based oxide is adopted as an electrolyte to realize high-performance disk-type electrolyte-supported cells; (2)

Toru Inagaki; Futoshi Nishiwaki; Satoru Yamasaki; Taner Akbay; Kei Hosoi

2008-01-01

446

Single crystal growth and characterization of lanthanumneodymium oxalate octahydrate  

Microsoft Academic Search

Single crystals of mixed lanthanumneodymium oxalates are grown by gel diffusion method using agar gel as a medium of growth. The crystals grow in the agar gel with hexagonal morphology having (001), (110) and (010) as habit faces. Single crystal X-ray diffraction results show that the crystals belong to monoclinic system with cell parameters; a=10.344(2), b=9.643(6), c=11.721(2), ?=118.7 (2) ,

Basharat Want

2011-01-01

447

Room temperature synthesis of high temperature stable lanthanum phosphateyttria nano composite  

SciTech Connect

Graphical abstract: A facile aqueous solgel route involving precipitationpeptization mechanism followed by electrostatic stabilization is used for synthesizing nanocrystalline composite containing lanthanum phosphate and yttria. Highlights: ? A novel lanthanum phosphateY{sub 2}O{sub 3} nano composite is synthesized for the first time using a modified facile sol gel process. ? The composite becomes crystalline at 600 C and X-ray diffraction pattern is indexed for monoclinic LaPO{sub 4} and cubic yttria. ? The composite synthesized was tested up to 1300 C and no reaction between the phases of the constituents is observed with the morphologies of the phases being retained. -- Abstract: A facile aqueous solgel route involving precipitationpeptization mechanism followed by electrostatic stabilization is used for synthesizing nanocrystalline composite containing lanthanum phosphate and yttria. Lanthanum phosphate (80 wt%)yttria (20 wt%) nano composite (LaPO{sub 4}20%Y{sub 2}O{sub 3}), has an average particle size of ?70 nm after heat treatment of precursor at 600 C. TGDTA analysis reveals that stable phase of the composite is formed on heating the precursor at 600 C. The TEM images of the composite show rod shape morphology of LaPO{sub 4} in which yttria is acquiring near spherical shape. Phase identification of the composite as well as the phase stability up to 1300 C was carried out using X-ray diffraction technique. With the phases being stable at higher temperatures, the composite synthesized should be a potential material for high temperature applications like thermal barrier coatings and metal melting applications.

Sankar, Sasidharan; Raj, Athira N.; Jyothi, C.K. [Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram 695019 (India)] [Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram 695019 (India); Warrier, K.G.K., E-mail: wwarrierkgk@yahoo.co.in [Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram 695019 (India)] [Material Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Thiruvananthapuram 695019 (India); Padmanabhan, P.V.A. [Bhabha Atomic Research Centre, Mumbai 400085 (India)] [Bhabha Atomic Research Centre, Mumbai 400085 (India)

2012-07-15

448

Lanthanum carbonate decreases PTH gene expression with no hepatotoxicity in uraemic rats  

Microsoft Academic Search

Background. Lanthanum (La) carbonate is an effective phosphate-binder, used to reverse hyperphosphatae- mia due to chronic kidney disease. Some recent studies in rodents have cast safety uncertainties. The aims of this study were to examine the effects of La on parathyroid hormone (PTH) gene expression and hepatic toxicity. Methods. Uraemia was induced in rats by a 0.3% adenine-containing diet for

Iddo Z. Ben-Dov; Orit Pappo; Miri Sklair-Levy; Hillel Galitzer; Yaron Ilan; Tally Naveh-Many; Justin Silver

2007-01-01

449

Atomization of yttrium, lanthanum, and neodymium in acetylene-nitrous oxide flame  

SciTech Connect

The degree of atomization of the element is the principal factor defining the sensitivity of the atomic-absorption determination. An attempt is made in this paper to establish its values for yttrium, lanthanum, and neodymium by the method of linear absorption, and also to estimate the effect of the degree of dissociation of the compounds, the degree of ionization, and the relative population of the ground energy level of the atoms on the efficiency of atomization of these elements.

Osipova, V.A.; Gorlova, M.N.; Kuzyakov, Y.Y.; Semenenko, K.A.

1985-10-01

450

Switching to lanthanum carbonate monotherapy provides effective phosphate control with a low tablet burden  

PubMed Central

Background. Despite recognized risks associated with hyperphosphataemia in patients with chronic kidney disease (CKD) Stage 5 on dialysis, the achievement of target levels of serum phosphate is poor. It is likely that this is partly due to poor adherence by patients to their phosphate-binder treatment regimens, which often comprise large daily tablet burdens. Methods. In this multicentre, open-label trial, patients on a stable dialysis regimen were screened while receiving phosphate-binder therapy, then entered into a washout phase. Patients with serum phosphate > 1.78 mmol/L after washout entered into the main 12-week treatment phase (N = 367), during which they were treated to target [Kidney Disease Outcomes Quality Initiative (K/DOQI)]: 1.131.78 mmol/L; 3.55.5 mg/dL) with lanthanum carbonate monotherapy. Efficacy variables included serum phosphate levels and the percentage of patients with serum phosphate control. Safety and tolerability assessments were also conducted. Results. Mean serum phosphate levels were significantly reduced following 12 weeks of lanthanum carbonate monotherapy versus previous phosphate-binder therapy. The mean number of phosphate-binder tablets being taken per day at screening was 7.6, but during treatment with lanthanum carbonate, most patients were taking doses of up to 3000 mg/day, achievable with 3 1000 mg tablets per day (maximum of 6). Conclusion. These findings suggest that lanthanum carbonate monotherapy offers effective control of serum phosphate and, due to a low tablet burden, may help to simplify the management of hyperphosphataemia in patients with CKD Stage 5.

Hutchison, Alastair J.; Laville, Maurice

2008-01-01

451

Magnetic properties of lanthanum orthoferrite fine powders prepared by different chemical routes  

Microsoft Academic Search

Fine powders of lanthanum iron oxide, LaFeO3, have been prepared by solid state reaction as well as sol-gel synthesis and nebulized spray pyrolysis. Structures, morphologies\\u000a and magnetic susceptibility measurements of these powders have been examined. The powders prepared by all the three low-temperature\\u000a routes contain nearly spherical particles with an average diameter of 40 nm. These samples show a lower

Benedict Ita; P. Murugavel; V. Ponnambalam; A. R. Raju

2003-01-01

452

Cr(3+)-Doped Lanthanum Gallogermanate Phosphors with Long Persistent IR Emission  

Microsoft Academic Search

Lanthanum gallogermanate co-doped with chromium (LaGaGeO:Cr{sup 3+}, M, where M = Li, Pb{sup 2+}, Zn{sup 2+}, Eu{sup 3+}, Tm{sup 3+}, and Dy{sup 3+}) samples have been prepared using a solid-state chemical reaction method. The phosphor with Dy{sup 3+} is observed to have a persistent IR emission for more than 8 h, which is recorded using a spectrometer. The wavelength of

George D Jia; Linda A Lewis; Xiao-jun Wang

2010-01-01

453

Fabrication of polycrystalline lanthanum manganite (LaMnO 3) nanofibers by electrospinning  

Microsoft Academic Search

Lanthanum manganite (LaMnO3) nanofibers were successfully fabricated by electrospinning utilizing solgel precursors. Polycrystalline cubic-perovskite structure LaMnO3 fibers of 50100nm were obtained by calcination of the inorganic\\/organic hybrid fibers at 600C for 1h. The XRD results showed that the grain size of the fibers increased significantly with the increase of calcinations temperature. The average diameter of crystal grains was 17nm after

Xianfeng Zhou; Yong Zhao; Xinyu Cao; Yanfeng Xue; Dapeng Xu; Lei Jiang; Wenhui Su

2008-01-01

454

Effect of chloride incorporation on the crystallization of zirconium-barium-lanthanum-aluminum fluoride glass  

NASA Technical Reports Server (NTRS)

One aspect of the influence of preparation procedure on the crystallization behavior of a zirconium-barium-lanthanum-aluminum fluoride glass was studied. The crystallization pattern of this glass may be affected by the chlorine concentration within it. In particular, when such glasses are heated at low temperatures, the alpha-Ba-Zr-F6 crystalline phase forms only in those glasses which contain chloride.

Neilson, G. F.; Smith, G. L.; Weinberg, M. C.

1985-01-01

455

Ferroelectric properties of alkoxy-derived lanthanum-modified bismuth titanate thin films  

Microsoft Academic Search

Lanthanum-modified bismuth titanate (BLT) thin films were fabricated by sol-gel processing with alkoxide solutions, and their physical and electrical properties were investigated as a first step to develop FeRAM devices for use in automobiles. Alkoxide solutions with compositions of Bi:La:Ti = 3.25:0.75:3 and 3.5:0.5:3 were prepared, and applied to formation of a Pt\\/BLT\\/Pt\\/Ti capacitor structure on oxidized Si wafers by

Y. Kageyama; T. Yoshida; Y. Mitsushima; K. Suzuki; K. Kato

2001-01-01

456

Lithium lanthanum titanate as an electrolyte for novel lithium ion battery systems  

Microsoft Academic Search

Solid electrolytes with high lithium conductivity may serve as useful components for enabling novel lithium ion battery system design. This work demonstrates the integration of lithium lanthanum titanate (Li0.29La0.57TiO3) into a battery system separating electrodes based on liquid electrolyte. Specifically, binder free electrodes based on graphite and LiCoO2 were tested against lithium metal in liquid electrolyte with an intermediate solid

Li Sun; Ke Sun; Shen Dillon

2011-01-01

457

Design of a lanthanum bromide detector for time-of-flight PET  

Microsoft Academic Search

Recent improvements in the growth and packaging of lanthanum bromide (LaBr3), in addition to its superb intrinsic properties of high light output, excellent energy resolution, and fast decay time, make it a viable detection material for a positron emission tomography (PET) scanner based on time-of-flight (TOF). We have utilized theoretical simulations and experimental measurements to investigate the design and performance

A. Kuhn; S. Surti; J. S. Karp; P. S. Raby; K. S. Shah; A. E. Perkins; G. Muehllehner

2004-01-01

458

Phase Stability Analysis of Lanthanum-Doped Alumina During Synthesis and Sintering  

Microsoft Academic Search

The aim of this research was to study the phase stability during synthesis and consolidation of nanocrystalline lanthanum-doped gamma-Al2O 3 powders. We used solution combustion synthesis by dissolving precursor nitrate compounds and an organic fuel in a pre-heated muffle furnace at 500C. Several preliminary syntheses were carried out in order to obtain the correct fuel-to-oxidizer ratio necessary for the production

Lum-Ngwegia Ngwa Nforbi

2010-01-01

459

Electrical conductivity and chemical diffusion coefficient of Sr-doped lanthanum chromites  

Microsoft Academic Search

The electrical conductivity and chemical diffusion coefficient of Sr-doped lanthanum chromites were measured as a function of oxygen partial pressure (Po2) and temperature, and the results were discussed in light of defect chemistry. The electrical conductivity was independent of Po2 and in proportion to the Sr-content at high Po2, while at low Po2, the conductivity decreased exponentially with decrease of

I. Yasuda; M. Hishinuma

1995-01-01

460

Lanthanum Chromite Based Catalysts for Oxidation of Methane Directly on SOFC Anodes  

Microsoft Academic Search

Catalytic properties of substituted lanthanum chromites were investigated for their use as anode materials for direct methane oxidation in solid oxide fuel cell (SOFC) anode materials. Different reaction mixtures were chosen to simulate the various SOFC operating conditions: partial oxidation, CO2 reforming by recycling, and H2O reforming. All experiments were performed in methane-rich atmospheres. Alkaline earth elements such as Ca,

Joseph Sfeir; Philippe A Buffat; Pedro Mckli; Nicolas Xanthopoulos; Ruben Vasquez; Hans Joerg Mathieu; Jan Van herle; K Ravindranathan Thampi

2001-01-01

461

Single crystal growth and characterization of lanthanum-neodymium oxalate octahydrate  

NASA Astrophysics Data System (ADS)

Single crystals of mixed lanthanum-neodymium oxalates are grown by gel diffusion method using agar gel as a medium of growth. The crystals grow in the agar gel with hexagonal morphology having (001), (110) and (010) as habit faces. Single crystal X-ray diffraction results show that the crystals belong to monoclinic system with cell parameters; a=10.344(2) , b=9.643(6) , c=11.721(2) , ?=118.7 (2) , bearing the space group P2/c. Fourier transform infrared spectrum of the crystals indicates the presence of water and other functional groups associated with the oxalate ions. Thermogravimetric and differential thermal analysis support the presence of 8H 2O molecules attached to the lanthanum-neodymium crystal lattice. The thermal decomposition in the nitrogen atmosphere leads to the formation of mixed lanthanum-neodymium oxide as the final product. Energy dispersive analysis of X-rays along with elemental analysis suggests the stoichiometry of the gel grown crystals to be La 1.5Nd 0.5(C 2O 4) 38H 2O.

Want, Basharat

2011-11-01

462

Investigation into Nanostructured Lanthanum Halides and CeBr3 for Nuclear Radiation Detection  

SciTech Connect

Nanocomposites may enable the use of scintillator materials such as cerium-doped lanthanum fluoride (LaF3:Ce) and cerium bromide (CeBr3) without requiring the growth of large crystals [1]. Nanostructured detectors may allow us to engineer immensely sized detectors of flexible form factors that will have a broad energy range and an energy resolution sufficient to perform isotopic identification. Furthermore, nanocomposites are easy to prepare and very low in cost. It is much less costly to use nanocomposites rather than grow large whole crystals of scintillator materials; with nanocomposites fabricated on an industrial scale, costs are even less. Nanostructured radiation scintillator detectors may improve quantum efficiency and provide vastly improved detector form factors. Quantum efficiencies up to 60% have been seen in photoluminescence from silicon nanocrystals in a densely-packed ensemble [2]. We have fabricated nanoparticles with sizes <10 nm and characterized their nanocomposite radiation detector properties. This work investigates the properties of the nanostructured radiation scintillator in order to extend the gamma energy response on both low- and high-energy regimes by demonstrating the ability to detect low-energy x-rays and relatively high-energy activation prompt gamma rays simultaneously using nanostructured lanthanum bromide, lanthanum fluoride, or CeBr3. Preliminary results of this investigation are consistent with a significant response of these materials to nuclear radiation.

Guss, P. P., Guise, R., Mukhopadhyay, S., Yuan, D.

2011-07-06

463

Facile and efficient one-pot synthesis of benzimidazoles using lanthanum chloride  

PubMed Central

Background We report the synthesis of benzimidazoles using lanthanum chloride as an efficient catalyst. One-pot synthesis of 2-substituted benzimidazole derivatives from o-phenylenediamine and a variety of aldehydes were developed under mild reaction conditions. Results We have examined the effect of different solvents using the same reaction conditions. The yield of the product varied with the nature of the solvents, and better conversion and easy isolation of products were found with acetonitrile. In a similar manner, the reaction with o-phenylenediamine and 3,4,5-trimethoxybenzaldehyde was carried out without any solvents. The observation shows that the reaction was not brought into completion, even after starting for a period of 9 h, and the reaction mixture showed a number of spots in thin-layer chromatography. Conclusions In conclusion, lanthanum chloride has been employed as a novel and efficient catalyst for the synthesis of benzimidazoles in good yields from o-phenylenediamine and a wide variety of aldehydes. All of the reactions were carried out in the presence of lanthanum chloride (10 mol%) in acetonitrile at room temperature.

2013-01-01

464

Lanthanum-molybdenum multilayer mirrors for attosecond pulses between 80 and 130 eV  

NASA Astrophysics Data System (ADS)

A novel multilayer material system consisting of lanthanum and molybdenum nano-layers for both broadband and highly reflecting multilayer mirrors in the energy range between 80 and 130 eV is presented. The simulation and design of these multilayers were based on an improved set of optical constants, which were recorded by extreme ultraviolet (XUV)/soft-x-ray absorption measurements on freestanding lanthanum nano-films between 30 eV and 1.3 keV. Lanthanum-molybdenum (La/Mo) multilayer mirrors were produced by ion-beam sputtering and characterized through both x-ray and XUV reflectivity measurements. We demonstrate the ability to precisely simulate and realize aperiodic stacks. Their stability against ambient air conditions is demonstrated. Finally, the La/Mo mirrors were used in the generation of single attosecond pulses from high-harmonic cut-off spectra above 100 eV. Isolated 200 attosecond-long pulses were measured by XUV-pump/IR-probe streaking experiments and characterized using frequency-resolved optical gating for complete reconstruction of attosecond bursts (FROG/CRAB) analyses.

Hofstetter, M.; Aquila, A.; Schultze, M.; Guggenmos, A.; Yang, S.; Gullikson, E.; Huth, M.; Nickel, B.; Gagnon, J.; Yakovlev, V. S.; Goulielmakis, E.; Krausz, F.; Kleineberg, U.

2011-06-01

465

The kinetics of uptake and recovery of lanthanum using freshwater algae as biosorbents: comparative analysis.  

PubMed

In this study, the adsorption and desorption kinetics of lanthanum (La) on micro algal cells was investigated. The internal transcribed spacer (ITS) and 18S ribosomal RNA gene (rRNA) were used for molecular identification of the species. The algal species were found to have 95-98% identities to Desmodesmus multivariabilis, Scenedesmus acuminutus, Chloroidium saccharophilum and Stichococcus bacillaris. The species were cultured and tested independently. D. multivariabilis was found to be the most efficient at adsorbing lanthanum with a maximum sorption capacity (qmax) of 100 mg/g and a high affinity (b) of 4.55 L/g. Desorption of La was also highest in D. multivariabilis with recovery up to 99.63% at initial concentration as high as 100 mg/L. Desorption data fitted best to the modified pseudo second-order with a better correlation coefficient (R(2)) of ?0.98 than first order model. The results showed feasibility of lanthanum recovery using algal sorbents, a cost effective method. PMID:24507581

Birungi, Z S; Chirwa, E M N

2014-05-01

466

Multicenter study of long-term (two-year) efficacy of lanthanum carbonate.  

PubMed

Long-term efficacy of lanthanum carbonate on hyperphosphatemia was examined in multicenter dialysis patients. Outcome and efficacy after 2 years was investigated in 101 patients who had undergone lanthanum carbonate administration. Thirty-three cases dropped out by the 2-year point; patients undergoing at least 2 years of administration totaled 68. Reasons for dropping out were as follows: improvement of hyperphosphatemia, nine cases; changing hospitals, seven cases; medical complications, five cases; digestive symptoms, four cases; poor compliance, four cases; parathyroidectomy, two cases; death, two cases. The mean dosage was increased from initial daily dosage of 744?mg to 1266?mg after 1 year, and to 1246?mg after 2 years. Serum phosphate concentration decreased significantly from the initial 6.15?mg to 5.57?mg/dL after 1 year, and to 5.45?mg/dL after 2 years. Although a lowering trend was observed in corrected calcium levels, the difference was not significant. Parathyroid hormone was unchanged. Achievement rate of Japanese Society for Dialysis Therapy (JSDT) management target values for both phosphorus and calcium improved from 32.7% to 50.0% after 1 year, and to 56.5% after 2 years. Lanthanum carbonate is useful as a therapeutic tool for hyperphosphatemia over long durations. PMID:23586506

Ando, Ryoichi; Kimura, Hitoshi; Sato, Hidehiko; Iwamoto, Shunsuke; Yoshizaki, Yuki; Chida, Yoshiko; Ishida, Yuji; Takayama, Masanobu; Yamada, Kouei; Tachibana, Ken; Ohtsuka, Masakazu; Kikuchi, Kan; Inoue, Atsushi

2013-04-01

467

Efficacy of continuous oral administration of lanthanum carbonate over 24 months.  

PubMed

To examine the efficacy of long-term administration of lanthanum carbonate, changes in serum Ca, phosphate, whole parathyroid hormone (wPTH), and ALP were examined in 40 patients who were able to tolerate dosage of lanthanum carbonate over a continuous period of 24 months. Concurrently, concomitant administration of other phosphate binders, cinacalcet, vitamin D, etc., was also examined. After 24 months, serum phosphorus levels (P levels) had decreased to within management target of guidelines, from 6.16??1.44?mg/dL to 5.58??1.15?mg/dL, and this effect was maintained for 2 years. There were no changes in Ca level. wPTH did not change significantly but tended to increase at 12 months. The dose of concomitantly administered calcium carbonate and sevelamer hydrochloride was reduced. The P-lowering function of lanthanum carbonate still held steady at 24 months following the start of dosage. Because of the rising trend seen in wPTH, dose of cinacalcet and/or vitamin D need to be modulated. Reducing the number of concomitantly administered phosphate binder tablets was desirable from the standpoint of patient adherence. PMID:23586509

Ishizu, Takashi; Hong, Zhang; Matsunaga, Tsuneaki; Kaneko, Yoko; Taru, Yoshinori

2013-04-01

468

40 CFR 61.151 - Standard for inactive waste disposal sites for asbestos mills and manufacturing and fabricating...  

Code of Federal Regulations, 2010 CFR

...for inactive waste disposal sites for asbestos mills and manufacturing and fabricating...POLLUTANTS National Emission Standard for Asbestos § 61.151 Standard for inactive waste disposal sites for asbestos mills and manufacturing and...

2010-07-01

469

Corrective Action Decision Document for Corrective Action Unit 151: Septic Systems and Discharge Area Nevada Test Site, Nevada.  

National Technical Information Service (NTIS)

This Corrective Action Decision Document has been prepared for Corrective Action Unit (CAU) 151, Septic Systems and Discharge Area, at the Nevada Test Site, Nevada, according to the Federal Facility Agreement and Consent Order (FFACO) (1996). Corrective A...

2006-01-01

470

38 CFR 17.151 - Invalid lifts for recipients of aid and attendance allowance or special monthly compensation.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Invalid lifts for recipients of aid and attendance allowance or special monthly... Prosthetic, Sensory, and Rehabilitative Aids § 17.151 Invalid lifts for recipients of aid and attendance allowance or special...

2013-07-01

471

42 CFR 483.151 - State review and approval of nurse aide training and competency evaluation programs.  

Code of Federal Regulations, 2013 CFR

... false State review and approval of nurse aide training and competency evaluation...Must Be Met by States and State Agencies: Nurse Aide Training and Competency Evaluation...483.151 State review and approval of nurse aide training and competency...

2013-10-01

472

46 CFR 160.151-59 - Operating instructions and information for the ship's training manual.  

Code of Federal Regulations, 2010 CFR

...and information for the ship's training manual. 160.151-59 Section...and information for the ship's training manual. (a) The liferaft manufacturer...information for the ship's training manual available in English to...

2009-10-01

473

33 CFR 151.2041 - What are the mandatory ballast water reporting requirements for all vessels equipped with ballast...  

Code of Federal Regulations, 2010 CFR

33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false What are the mandatory ballast water reporting requirements for all vessels...151.2041 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2010-07-01

474

33 CFR 151.2041 - What are the mandatory ballast water reporting requirements for all vessels equipped with ballast...  

Code of Federal Regulations, 2011 CFR

33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false What are the mandatory ballast water reporting requirements for all vessels...151.2041 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF...

2011-07-01

475

46 CFR 154.151 - Procedures for having the Coast Guard examine a vessel for a Certificate of Compliance.  

Code of Federal Regulations, 2013 CFR

...Procedures for having the Coast Guard examine a vessel for a Certificate of Compliance. 154... SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES Inspections...Examination Requirements for Foreign Flag Vessels § 154.151 Procedures for...

2013-10-01

476

17 CFR 151.11 - Designated contract market and swap execution facility position limits and accountability rules.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Designated contract market and swap execution facility position...SWAPS § 151.11 Designated contract market and swap execution facility position...trading facilities and designated contract markets shall adopt, enforce, and,...

2013-04-01

477

Antiviral antibiotic S15-1. Taxonomy of the producing strain and study of conditions for production of the antibiotic.  

PubMed

Strain S15-1 which produces antiviral antibiotic S15-1 belonging to the streptothricin group of antibiotics was isolated from a soil sample. Cell analysis, colony morphology, the absence of sporangia-like vesicles, the formation of spores in chains of the Rectus Flexibilis type, and the ability to produce melanoid pigment, indicate that this strain belongs to the genus Streptomyces Waksman and Henrici. A comparison of the characteristics of strain S15-1 with related Streptomyces show that it should be identified as Streptomyces purpeofuscus Yamaguchi and Saburi. The investigation of cultural conditions show that soluble starch and meat extract are the most suitable carbon and organic nitrogen sources for the production of antibiotic S15-1. Strain S15-1 grew poorly on media with no organic nitrogen sources, and did not produce the antibiotic. Antiviral antibiotic S15-1 is accumulated at the highest level after 3 or 4 days growth of the producing organism. PMID:816763

Kawamura, T; Tago, K; Beppu, T; Arima, K

1976-03-01

478

Materials system for intermediate temperature solid oxide fuel cells based on doped lanthanum-gallate electrolyte  

NASA Astrophysics Data System (ADS)

The objective of this work was to identify a materials system for intermediate temperature solid oxide fuel cells (IT-SOFCs). Towards this goal, alternating current complex impedance spectroscopy was employed as a tool to study electrode polarization effects in symmetrical cells employing strontium and magnesium doped lanthanum gallate (LSGM) electrolyte. Several cathode materials were investigated including strontium doped lanthanum manganite (LSM), Strontium and iron doped lanthanum cobaltate (LSCF), LSM-LSGM, and LSCF-LSGM composites. Investigated Anode materials included nickel-gadolinium or lanthanum doped cerium oxide (Ni-GDC, or Ni-LDC) composites. The ohmic and the polarization resistances of the symmetrical cells were obtained as a function of temperature, time, thickness, and the composition of the electrodes. Based on these studies, the single phase LSM electrode had the highest polarization resistance among the cathode materials. The mixed-conducting LSCF electrode had polarization resistance orders of magnitude lower than that of the LSM-LSGM composite electrodes. Although incorporating LSGM in the LSCF electrode did not reduce the cell polarization resistance significantly, it could reduce the thermal expansion coefficient mismatch between the LSCF electrodes and LSGM electrolyte. Moreover, the polarization resistance of the LSCF electrode decreased asymptotically as the electrode thickness was increased thus suggesting that the electrode thickness needed not be thicker than this asymptotic limit. On the anode side of the IT-SOFC, Ni reacted with LSGM electrolyte, and lanthanum diffusion occurred from the LSGM electrolyte to the GDC barrier layer, which was between the LSGM electrolyte and the Ni-composite anode. However, LDC served as an effective barrier layer. Ni-LDC (70 v% Ni) anode had the largest polarization resistance, while all other anode materials, i.e. Ni-LDC (50 v% Ni), Ni-GDC (70 v% NO, and Ni-GDC (50 v% Ni), had similar polarization resistances. Ni-LDC (50 v% NO was selected to be the anode for the LSGM electrolyte with a thin LDC barrier layer. Finally, the performance of complete LSGM electrolyte-supported IT-SOFCs with the selected cathode (LSCF-LSGM) and anode (Ni-LDC) materials coupled with the LDC barrier layer was evaluated at 600--800C. The simulated cell performance of the anode-supported cell based on LSGM electrolyte was promising.

Gong, Wenquan

479

The distribution of the lanthanum anomaly in the Dutch branches of the Rhine River  

NASA Astrophysics Data System (ADS)

The elements lanthanum to lutetium, usually referred as the REE, are increasingly used in numerous high technology products and processes. Such products are Gadolinium chelates, used as contrasting agents in medical imaging, and produce positive anthropogenic Gd-anomalies in rare earth shale normalized (Reenasc) patterns in rivers, surface and ground waters and shallow seas. Because of the increased use of the REE, the monitoring program of the Rhine-Meuse branches and surface water influenced by them in the Netherlands was extended from 2008 with the REE. In this monitoring program both the total and dissolved (< 0.45 ?m) fraction are analyzed. At the monitoring station Lobith, where the River Rhine enters the Netherlands, the REEnasc-patterns show beside the well-known Gd-anomaly a distinct La-anomaly. This positive La-anomaly in the Rhine River is recently also reported by Kulaksiz and Bau (2011, sampling was done in 2009) and first occur in the Rhine River north of the city of Worms, 400km upstream of the Dutch-German border. Kulaksiz and Bau could show that this anomaly is of anthropogenic origin and can be traced back to the effluent from a production plant for fluid catalytic cracking catalysts at Rhine river-km 447.4. The amount of anthropogenic lanthanum in the total fraction in Lobith station is an order of magnitude larger than in the dissolved fraction indicating that the suspended matter in the Rhine River is the major carrier of the anthropogenic lanthanum. All REEnasc- patterns of the branches of the Rhine River show in addition to the Gd-anomaly a positive La-anomaly, while in the Meuse River only a Gd-anomaly is observed. In the influenced surface waters of the Rhine and Meuse Rivers always a Gd-anomaly occurs but in those influenced by the Rhine tributaries also the La-anomaly occurs. In the poster the load of lanthanum over the years 2008, 2009 and 2010 in the dissolved and total fraction at Lobith and the distribution of the La anomaly over the branches of the Rhine River in the Netherlands (4 monitoring stations) and influenced surface water (5 monitoring stations) will be shown. The Meuse monitoring stations will be given for comparison. Kulaksiz, S., Bau, M., 2011. Rare earth elements in the Rhine River, Germany: First case of anthropogenic lanthanum as a dissolved microcontaminant in the hydrosphere. Environment International, 37: 973-879.

Verheul, M.; Klaver, G.; Bakker, I.; Petelet-Giraud, E.

2011-12-01

480

Glass formation and crystallization in the alumina-silica-lanthanum phosphate system for ceramics composites  

NASA Astrophysics Data System (ADS)

The formation, structure, and dynamics of glasses in the alumina-silica-lanthanum phosphate system and their crystallization were investigated as a function of composition. These are of interest because of their potential as precursors for synthesizing ceramic-matrix-composites via co-crystallization of lanthanum monazite and either mullite or alumina into finely mixed microstructures. The glasses were characterized by X-Ray Diffraction (XRD), Raman spectroscopy, Differential Scanning Calorimetry (DSC), Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Electron Energy Loss Spectrometry (EELS). Glass formation from rapidly quenched liquids was easiest and most consistent for compositions containing silica, such as for mullitemonazite compositions, and more difficult for alumina-monazite compositions. For mullite-monazite glasses, the glass transition temperatures increased linearly from 845C to 906C with increasing mullite content. An analysis of the glass structure indicated a network consisting of corner-linked aluminate, silicate and phosphate tetrahedra where aluminum played a central role of separating silicon and phosphorous. It was hypothesized that the glass network consisted of domains of aluminum silicate network edged by phosphate tetrahedra. A maximum in the crystallization temperature was attributed to the complexity of the glass network. At relatively mullite-rich compositions, simultaneous and cooperative crystallization of lanthanum phosphate and mullite correlated with the highest crystallization temperatures, and the lowest activation energies of crystallization. This was preceded by amorphous phase segregation in the glass at lower temperatures. An intermediate phase of lanthanum phosphate was discovered with an orthorhombic unit cell. For compositions of high phosphate contents, lanthanum phosphate precipitated first at about 900C leaving an essentially pure mullite glass. Mullite crystallized at about 1000C, matching the conditions for crystallizing pure mullite glass. The phosphate phase transformed to monazite at even higher temperatures. No amorphous phase segregation was observed in these cases. Microstructures were correlated with nucleation and growth conditions such that the continuous and isolated phases could be manipulated. Optimum nucleation temperatures were close to the glass transition temperature. Conditions were identified for forming a continuous boundary phase of monazite that isolated mullite grains, which is desired for fabricating ceramic-matrix-composites.

Guo, Shuling

481

Cross sections and ?-rays from multiple neutron capture in151Eu  

NASA Astrophysics Data System (ADS)

Primary capture gamma rays following multiple neutron capture in151Eu have been measured as a function of the irradiation time. Neutron capture cross sections of the152Eu 3- groundstate and of the152Eu 0- isomer ( T 1/2=9.3h) were determined. These cross sections are relevant for the interpretation of inelastic scattering of neutrons at isomeric states with energy gain (neutron acceleration). The level scheme of153Eu has been extended. Neutron binding energies of152Eu,153Eu,153Gd and154Gd are given.

von Egidy, T.; Brner, H. G.; Hoyler, F.

1985-12-01

482

Differential permeability of pineal capillaries to lanthanum ion in the rat ( Rattus norvegicus ), gerbil ( Meriones unguiculatus ) and golden hamster ( Mesocricetus auratus )  

Microsoft Academic Search

Capillaries in the pineal gland of the rat (Rattus norvegicus), gerbil (Meriones unguiculatus) and golden hamster (Mesocricetus auratus) were investigated by means of electron-microscopical tracer studies using lanthanum. The tracer was administered together with the fixative solution by perfusion via the left cardiac ventricle. In the rat, endothelial junctions of fenestrated capillaries are permeable to lanthanum. In the gerbil the

Maria Hewing; Martin Bergmann

1985-01-01

483

Levels of Circulating MMCN-151, a Degradation Product of Mimecan, Reflect Pathological Extracellular Matrix Remodeling in Apolipoprotein E Knockout Mice  

PubMed Central

Aim: Arterial extracellular matrix (ECM) remodeling by matrix metalloproteinases (MMPs) is one of the major hallmarks of atherosclerosis. Mimecan, also known as osteoglycin has been implicated in the integrity of the ECM. This study assessed the validity of an enzyme-linked immunosorbent assay (ELISA) developed to measure a specific MMP12-derived fragment of mimecan, MMCN-151, in apolipoprotein-E knockout (ApoE-KO) mice. Methods and results: A mouse monoclonal antibody raised against MMCN-151 was used to develop a competitive ELISA. The assay was validated using samples from 20 ApoE-KO and 20 wild type [C57 BL/6] male mice fed a normal or high-fat diet (HFD) for up to 20 weeks. The technical reliability of the assay was established with intra-assay variability <2% and inter-assay variability <10%. The lowest limit of quantification of MMCN-151 was 0.5 ng/ml. ApoE-KO mice fed a HFD for 20 weeks had four-fold increased circulating levels of MMCN-151 compared to baseline, whereas MMCN-151 levels in control mice on HFD increased two-fold compared with baseline. After 10 weeks of a HFD, a significant difference in MMCN-151 levels was observed between ApoE-KO and control mice (P = 0.005) and became more significant at 20 weeks (P = 0.002). Conclusions: The newly developed assay is a reliable detector of MMCN-151 levels which ultimately may be useful indicators of arterial remodeling in patients affected by atherosclerotic disease.

Barascuk, N.; Vassiliadis, E.; Zheng, Q.; Wang, Y.; Wang, W.; Larsen, L.; Rasmussen, L.M.; Karsdal, M.A.

2011-01-01

484

Heterogeneous photocatalytic decomposition of benzene on lanthanum-doped TiO2 film at ambient temperature.  

PubMed

Lanthanum-doped anatase TiO2 thin films on glass prepared via a sol-gel process have been shown to have much higher photocatalytic activity for the degradation of gaseous benzene than pure anatase TiO2 thin film. The photodecomposition of benzene on both types of TiO2 films follows the first-order kinetics while the CO(2) and CO formation followed the zero-order kinetics. GC/MS identification of the intermediates produced during the photodegradation of benzene revealed that doping lanthanum into TiO2 thin film favors a cleavage of benzene ring. An optimal lanthanum amount with respect to photocatalytic activity was about 2.5 wt% (La2O3/TiO2). PMID:16814365

Zhang, Shicheng; Zheng, Zhijian; Wang, Jinhe; Chen, Jianmin

2006-12-01

485

High pressure phase transitions in the rare earth metal erbium to 151 GPa.  

PubMed

High pressure x-ray diffraction studies have been performed on the heavy rare earth metal erbium (Er) in a diamond anvil cell at room temperature to a pressure of 151 GPa and Er has been compressed to 40% of its initial volume. The rare earth crystal structure sequence hcp ? Sm type ? dhcp ? distorted fcc (hcp: hexagonal close packed; fcc: face centered cubic; dhcp: double hcp) is observed in Er below 58 GPa. We have carried out Rietveld refinement of crystal structures in the pressure range between 58 GPa and 151 GPa. We have examined various crystal structures that have been proposed for the distorted fcc (dfcc) phase and the post-dfcc phase in rare earth metals. We find that the hexagonal hR 24 structure is the best fit between 58 and 118 GPa. Above 118 GPa, a structural transformation from hR 24 phase to a monoclinic C 2/m phase is observed with a volume change of - 1.9%. We have also established a clear trend for the pressure at which a post-dfcc phase is formed in rare earth metals and show that there is a monotonic increase in this pressure with the filling of 4f shell. PMID:21753243

Samudrala, Gopi K; Thomas, Sarah A; Montgomery, Jeffrey M; Vohra, Yogesh K

2011-08-10

486

Removal of arsenic(III) and arsenic(IV) ions from aqueous solutions with lanthanum(III) salt and comparison with aluminum(III), calcium(II), and iron(III) salts  

SciTech Connect

Interactions of arsenic(III) and arsenic(V) ions with a lanthanum salt were studied with the aim of developing a new precipitation method for removal of arsenic from aqueous solutions. Performance was compared to those of aluminum, polyaluminum chloride (PAC), calcium, and iron(III) salts. Arsenic(III) was removed by iron(III) and lanthanum in a narrow pH range with less than 605 removal. Arsenic(V) was removed more efficiently by aluminum, PAC, iron(III), and lanthanum. Lanthanum was most effective, meeting Japanese effluent and drinking water standards by adding three times as much lanthanum as arsenic(V).

Tokunaga, S.; Yokoyama, S.; Wasay, S.A.

1999-05-01

487

Lanthanum carbonate for the treatment of hyperphosphatemia in CKD 5D: multicenter, double blind, randomized, controlled trial in mainland China  

PubMed Central

Background Serum phosphorus control is critical for chronic kidney disease (CKD) 5D patients. Currently, clinical profile for an oral phosphorus binder in the mainland Chinese population is not available. Objective To establish the efficacy, safety, and tolerability of lanthanum carbonate in CKD 5D patients. Design Multicenter, randomized, double blind, placebo-controlled study. A central randomization center used computer generated tables to allocate treatments. Setting Twelve tertiary teaching hospitals and medical university affiliated hospitals in mainland China. Participants Overall, 258 hemodialysis or continuous ambulatory peritoneal dialysis (CAPD) adult patients were enrolled. Intervention After a 03-week washout period and a 4-week lanthanum carbonate dose-titration period, 230 patients were randomized 1:1 to receive lanthanum carbonate (1500 mg-3000 mg) or placebo for a further 4-week maintenance phase. Main outcome measures Efficacy and safety of lanthanum carbonate to achieve and maintain target serum phosphorus concentrations were assessed. Results In the titration phase, serum phosphorus concentrations of all patients decreased significantly. About three-fifths achieved target levels without significantly disturbing serum calcium levels. At the end of the maintenance period, the mean difference in serum phosphorus was significantly different between the lanthanum carbonate and placebo-treated groups (0.630.62 mmol/L vs. 0.150.52 mmol/L, P < 0.001). The drug-related adverse effects were mild and mostly gastrointestinal in nature. Conclusion Lanthanum carbonate is an efficacious and well-tolerated oral phosphate binder with a mild AE profile in hemodialysis and CAPD patients. This agent may provide an alternative for the treatment of hyperphosphatemia in CKD 5D patients in mainland China. Trial registration No. ChiCTR-TRC-10000817

2013-01-01

488

Tape casting and sintering of strontium-doped lanthanum chromite for a planar solid oxide fuel cell bipolar plate  

SciTech Connect

Nonagglomerated strontium-doped lanthanum chromite powders were prepared by a modified Pechini resinintermediate process and tape cast to form bipolar plates for a planar solid oxide fuel cell. An air-sintering technique for the strontium-doped lanthanum chromite was developed, which involved placing the green tape between Cr{sub 2}O{sub 3}-fired plates. The sintering process was found to be diffusion controlled, with densification beginning at the surface and proceeding to the interior. A bipolar plate of 2-mm thickness was fired to more than 9.3.5% theoretical density when fired at 1670{degrees}C for 7 h.

Tai, L.W.; Lessing, P.A. (New Mexico Inst. of Mining and Technology, Socorro, NM (US))

1991-01-01

489

Induced assembly and photoluminescence of lanthanum (Tb, Eu, Dy) complexes/ZnO/polyethylene glycol hybrid phosphors  

NASA Astrophysics Data System (ADS)

Some novel kinds of hybrid phosphors were assembled with lanthanum (Tb, Eu, Dy) complexes (with four kinds of terbium complexes is 2,4-dihydroxybenzonic acid (DHBA), 1,10-phenanthroline (phen), acetylacetone (AA) and nicotinic acid (Nic), respectively) doped ZnO/PEG particles by co-precipitation approach derived from Zn(CH 3COO) 2 (Zn(AC) 2), NaOH, PEG as precursors at room temperature. The characteristic luminescence spectra for f-f transitions of Tb 3+, Eu 3+, Dy 3+ were observed. It is worthy to point out that ZnO is the excellent host for lanthanum ions by the assembly of PEG matrices.

Yan, Bing; Chen, Xi; Wu, Jianhua

2007-08-01

490

Rutherford backscattering spectrometry (RBS) characterization of oxide scale formed on (AISI-304) steel after surface deposition of lanthanum  

SciTech Connect

Oxidized AISI-304 steel samples coated with lanthanum have been investigated by Rutherford backscattering spectrometry (RBS) in order to determine the composition profile of the oxide scale. In this sense, RBS technique has been revealed as a very reliable and nondestructive method for depth profile analysis. Lanthanum deposition, specially over preoxidized specimens, has proven to improve their resistance to high temperature oxidation. The formation of a LaCrO{sub 3} perovskite-like phase uniformly distributed along the oxide scale is proposed as being responsible for this behavior.

Ager, F.J.; Respaldiza, M.A.; Benitez, J.J.; Odriozola, J.A. [Univ. de Sevilla (Spain)] [Univ. de Sevilla (Spain); Botella, J. [Acerinox S.A., Los Barrios, Cadiz (Spain)] [Acerinox S.A., Los Barrios, Cadiz (Spain); Soares, J.C. [Univ. de Lisboa (Portugal). Centro de Fisica Nuclear] [Univ. de Lisboa (Portugal). Centro de Fisica Nuclear; Silva, M.F. da [Inst. Nacional de Engenheria e Tecnologia Industrial, Sacavem (Portugal)] [Inst. Nacional de Engenheria e Tecnologia Industrial, Sacavem (Portugal)

1996-02-01

491

Surface and catalytic properties for lanthanum-promoted Ni/sepiolite catalysts for styrene hydrogenation  

SciTech Connect

The catalytic behavior for styrene hydrogenation of two series of La-promoted nickel/sepiolite catalysts (xLaNi and NixLa) is reported. Both series were prepared by two-step impregnations, but lanthanum was incorporated first and nickel afterward in NixLa series and the order was reversed in xLaNi samples. The catalysts were characterized by temperature-programmed reduction (TPR), kinetics of reduction by hydrogen, photoelectron spectroscopy (XPS), and infrared spectroscopy of adsorbed CO to obtain information on the nature and distribution of nickel and lanthanum in the oxidic and reduced samples. The kinetics of reduction and XPS data indicate clearly that Ni{sup 2+}, ions interact strongly with the sepiolite substrate in xLaNi samples and to a lesser extent in NixLa series. The IR spectra of CO adsorbed on the reduced catalysts demonstrate that the promotion of Ni/sepiolite catalyst with lanthana results in a change in the distribution of CO-adsorbed structures. It appears that reconstruction of bridge-bonded species occurs via formation of Ni(100) surfaces. Moreover, CO can be adsorbed in a linear form on Ni atoms which are in contact with oxidic phase. The decrease of the bridged form and relative higher concentration of unreduced nickel species gives an indication that lanthanum is deposited on the nickel particles, leading to a decrease in the probability to have adjacent nickel atoms on the surface. The observed stable maximum in activity for the Ni7.1La catalyst is caused not only by covering by La a larger fraction of the silicate substrate but also by isolating Ni atoms on the surface of Ni crystallites by La{sub 2}O{sub 3} patches deposited on it. 29 refs., 10 figs., 2 tabs.

Damyanova, S. [Bulgarian Academy of Sciences, Sofia (Bulgaria)] [Bulgarian Academy of Sciences, Sofia (Bulgaria); Daza, L.; Fierro, J.L.G. [Instituto de Catalisisy, Cantoblanco, Madrid (Spain)] [Instituto de Catalisisy, Cantoblanco, Madrid (Spain)

1996-03-01

492

Biomimetic aminoacylation of ribonucleotides and RNA with aminoacyl phosphate esters and lanthanum salts.  

PubMed

Aminoacylation of tRNA in cells involves activation of the amino acid as an aminoacyl adenylate, a mixed anhydride with AMP, which reacts with tRNA. We have now established that aminoacyl phosphate esters in the presence of lanthanide ions in water will acylate hydroxyls at the 3'-terminus of RNA or a simple nucleotide. By extension, this will permit synthetically aminoacylated tRNA to be produced in a single-step biomimetic process. The reactions of Boc-4-fluorophenylalanyl ethyl phosphate were followed by HPLC separation, MS, and 19F NMR analysis. In stoichiometric combination with lanthanum salts in aqueous buffer, Boc-4-fluorophenylalanyl ethyl phosphate rapidly produces 2'- and 3'-monoesters of cytidine and cytidine monophosphate. Reaction of the reagent with RNA in the presence of lanthanum and magnesium salts introduces a specifically detectable signal into the RNA, which is evidence of formation of the aminoacyl ester. When the same RNA is initially oxidized with periodate to convert the 3'-terminal vicinal diol to the cleaved dialdehyde, reaction with the aminoacyl phosphate no longer occurs as evidenced by the lack of a signal in the 19F NMR spectrum. The results are consistent with a requisite chelation mechanism in which lanthanum serves as a template for both the aminoacyl phosphate and the 3'-terminal diol of RNA and nucleotides. The coordinated diol will then react through specific base-catalyzed intramolecular addition of the alkoxide nucleophile to the acyl group of the aminoacyl phosphate. Assessment of the method with a single tRNA was also achieved using the fluorescent reagent N-dansyl-glycyl ethyl phosphate. Lanthanide-promoted aminoacylation at the 3'-terminus of tRNAPhe is detected by the introduction of fluorescence (detected directly and by antibody-enhanced emission). This does not occur if the 3'-terminus is converted to the dialdehyde by reaction with periodate. PMID:18052163

Tzvetkova, Svetlana; Kluger, Ronald

2007-12-26

493

Fabrication of Lanthanum Telluride 14-1-11 Zintl High-Temperature Thermoelectric Couple  

NASA Technical Reports Server (NTRS)

The development of more efficient thermoelectric couple technology capable of operating with high-grade heat sources up to 1,275 K is key to improving the performance of radioisotope thermoelectric generators. Lanthanum telluride La3-xTe4 and 14-1-11 Zintls (Yb14MnSb11) have been identified as very promising materials. The fabrication of advanced high-temperature thermoelectric couples requires the joining of several dissimilar materials, typically including a number of diffusion bonding and brazing steps, to achieve a device capable of operating at elevated temperatures across a large temperature differential (up to 900 K). A thermoelectric couple typically comprises a heat collector/ exchanger, metallic interconnects on both hot and cold sides, n-type and ptype conductivity thermoelectric elements, and cold-side hardware to connect to the cold-side heat rejection and provide electrical connections. Differences in the physical, mechanical, and chemical properties of the materials that make up the thermoelectric couple, especially differences in the coefficients of thermal expansion (CTE), result in undesirable interfacial stresses that can lead to mechanical failure of the device. The problem is further complicated by the fact that the thermoelectric materials under consideration have large CTE values, are brittle, and cracks can propagate through them with minimal resistance. The inherent challenge of bonding brittle, high-thermal-expansion thermoelectric materials to a hot shoe material that is thick enough to carry the requisite electrical current was overcome. A critical advantage over prior art is that this device was constructed using all diffusion bonds and a minimum number of assembly steps. The fabrication process and the materials used are described in the following steps: (1) Applying a thin refractory metal foil to both sides of lanthanum telluride. To fabricate the n-type leg of the advanced thermoelectric couple, the pre-synthesized lanthanum telluride coupon was diffusion bonded to the metal foil using a thin adhesion layer. (2) Repeating a similar process for the 14-1-11 Zintl p-type leg of the advanced thermoelectric couple. (3) Bonding thick CTE-matched metal plates on the metallized lanthanum telluride and Yb14MnSb11 to form the hot and cold sides of the thermoelectric couple. The calculated conversion efficiency of such an advanced couple would be about 10.5 percent, about 35 percent better than heritage radioisotope thermoelectric technology that relies on Si-Ge alloys. In addition, unlike Si-Ge alloys, these materials can be combined with many other thermoelectric materials optimized for operation at lower temperatures to achieve conversion efficiency in excess of 15 percent (a factor of 2 increase over heritage technology).

Ravi, Vilupanur A.; Li, Billy Chun-Yip; Fleurial, Pierre; Star, Kurt

2010-01-01

494

Synthesis of lanthanum zirconium oxide nanomaterials through composite-hydroxide-mediated approach  

Microsoft Academic Search

A novel thermal barrier coating material, lanthanum zirconium oxide (La2Zr2O7) has been synthesized through the composite-hydroxide-mediated method at low temperature. The phase structures, morphology, thermal stability and thermal conductivity of the as-synthesized La2Zr2O7 were investigated systematically. The X-ray diffraction (XRD) patterns revealed a single phase with cubic pyrochlore structure for La2Zr2O7 after treated at 1300C for 100h. The transmission electron

Hongyun Jin; Dan Huang; Qiang Gao; Li Li; Ning Wang; Yongqian Wang; Shuen Hou

495

Formation of plate-like lanthanum-?-Aluminate crystal in Ce-TZP matrix  

Microsoft Academic Search

The reaction route and morphology of lanthanum--aluminate (LBA) crystals formed in Ce-TZP matrix were studied by examining the crystal phase changes and the microstructures in relation to the heat-treatment time, heat-treatment temperatures and the particle size of raw Al2O3 powders. In the Ce-TZP matrix, the LBA crystal was formed by the reaction between La2O3 and Al2O3 through the LaAlO3 phase

M. Miura; H. Hongoh; T. Yogo; S. Hirano; T. Fujll

1994-01-01

496

Small yttrium-carbon and lanthanum-carbon clusters: Rings are most stable  

SciTech Connect

A theoretical study has been undertaken to determine the energetics of a variety of neutral and cationic isomeric forms of metal clusters MC{sub x}, where M = Y or La and x = 3-6. Included in this study are cyclic molecules and linear molecules, as well as recently-proposed `kite` structures. Geometries are optimized by the B3LYP density functional method, and energies are computed with the coupled-cluster method. The major conclusion of this work is that cyclic structures are the most stable, a result which holds for both yttrium and lanthanum and for both cations and neutral molecules. 19 refs., 1 fig., 2 tabs.

Strout, D.L.; Hall, M.B. [Texas A& M Univ., College Station, TX (United States)] [Texas A& M Univ., College Station, TX (United States)

1996-11-14

497

Doping of lanthanum cobaltite by Mn: thermal, magnetic, and catalytic effect  

Microsoft Academic Search

Great differences in crystallographic phases, magnetic properties, and catalytic activity were detected in lanthanum cobaltite\\u000a and cobaltite modified with the insertion of 10wt.% of Mn. Atomic absorption spectroscopy, BET area measurements, XRD analysis,\\u000a TPR, and FT-IR suggest that the total insertion of manganese in the LaCoO3 structure is successful. Thermal stability is reached for LaCo0.90Mn0.10O3 up to 973K without loss

Gina Pecchi; Claudia Campos; M. Graciela Jiliberto; Yanko Moreno; Octavio Pea

2008-01-01

498

Effect of lanthanum ions on the phase transitions of lecithin bilayers.  

PubMed Central

Interaction of lanthanum ions (La3+) with 1,2 dipalmitoyl-sn-glycero-3-phosphorylcholine (DPPC) causes an increase in Tc, the temperature of maximal excess heat capacity, and the width of the gel-to-liquid crystalline transition. At a mole ratio of La3+ to DPPC sufficient to remove the hydrocarbon chain tilt angle of DPPC, the changes in the thermodynamic parameters of the pretransition are minor, Tc and the width were unaltered and the enthalpy was reduced by only 10%. This suggests that the change in tilt angle is not a necessary concomitant of the pretransition.

Chowdhry, B Z; Lipka, G; Dalziel, A W; Sturtevant, J M

1984-01-01

499

Lanthanum associated abnormal liver function tests in two patients on dialysis: a case report  

PubMed Central

Lanthanum (La) is a phosphate binder used in patients on dialysis in the UK. As it has only recently been in use, there are no long-term data about safety of this rare metal in human subjects with renal failure on renal replacement therapy. La has not been previously reported to cause any adverse reactions apart from nausea, sickness, dialysis graft occlusion and abdominal pain. We report here La induced abnormal liver function tests in a male and a female patient of 70 and 44 years old each, on peritoneal dialysis (PD) and haemodialysis (HD) respectively, the first report of such an adverse reaction to this agent.

2009-01-01

500

Temperature Dependent Electrical and Micromechanical Properties of Lanthanum Titanate with Additions of Yttria  

NASA Technical Reports Server (NTRS)

Lanthanum titanate (La2Ti2O7) a layered distorted perovskite (1) with space group Pna2(sub 1) has been shown to have potential as a high temperature piezoelectric (2). However this highly refractory oxide compound must be consolidated at relatively high temperatures approximately 1400 C. Commercial La2Ti207 powders were mechanically alloyed with additions of Y2O3 to lower the consolidation temperature by 300 C and to provide post processing mechanical stability. Temperature dependent electrical, elastic and anelastic behavior were selected as nondestructive means of evaluating the effects of yttria on the properties of this ferroceramic material.

Goldsby, Jon C.

2003-01-01