Sample records for protactinium 234

  1. The 234mPa Generator: Aspects of Milking the "234th Cow."

    ERIC Educational Resources Information Center

    Schwankner, Robert J.; And Others

    1985-01-01

    Uses the protactinium (Pa-234m) generator to illustrate the production of isotopes of short half-life for medical analysis. The principle of nuclide generators and suggested experiments (with procedures and typical results) are discussed. (JN)

  2. RECOVERY OF PROTACTINIUM FROM AQUEOUS SOLUTIONS

    DOEpatents

    Elson, R.E.

    1959-07-14

    The recovery of fluoride complexed protactinium from aqueous acidic solutions by solvent extraction is described. Generally the prccess of the invention com rises mixing an aqueous solution containing protactinium in a complexed form with an organic solvent which is specific for protactinium, such as diisopropyl carbinol, then decomposing the protactinium complex by adjusting the acidity of the aqueous solution to between 0-3 to 0-9 M in hydrogen ion concentration, and introducing a source of aluminum ions in sufficient quantity to establish a concentration of 0.5 to 1.2 M aluminum ion, whereupon decomposition of the protactinium fluoride complex takes place and the protactinium ion is taken up by the organic solvent phase.

  3. SEPARATION OF PROTACTINIUM FROM CONTAMINANTS

    DOEpatents

    Malm, J.G.; Fried, S.

    1959-07-01

    The separation of protactinium by volatilization method is described. According to the invention, neutron irradiated finely divided thorium is reacted with aluminum trichloride or a mixture of aluminum trichloride and chlorine gas at a temperature of preferably between about 200 and 400 deg C. Following the chlorinating step the protactinium chloride along with aluminum chloride is selectively distilled from the mixture at a temperature of approximately 100 deg C. The protactinium chloride may be recovered from the mixture by treatment with sodium hydroxide, which converts the aluminum chloride to a soluble salt and forms insoluble protactinium hydroxide.

  4. PRECIPITATION OF PROTACTINIUM

    DOEpatents

    Moore, R.L.

    1958-07-15

    An lmprovement in the separation of protactinium from aqueous nitric acid solutions is described. 1t covers the use of lead dioxide and tin dioxide as carrier precipitates for the protactinium. In carrying out the process, divalent lead or divalent tin is addcd to the solution and oxidized, causing formation of a carrier precipitate of lead dioxide or stannic oxide, respectively.

  5. SEPARATION PROCESS FOR PROTACTINIUM AND COMPOUNDS THEREOF

    DOEpatents

    Van Winkle, A.

    1959-07-21

    The separation of protactinium from aqueous solutions from its mixtures with thorium, uranium and fission products is described. The process for the separation comprises preparing an ion nitric acid solution containing protactinium in the pentavalent state and contacting the solution with a fluorinated beta diketone, such as trifluoroacetylacetone, either alone or as an organic solvent solution to form a pentavalent protactinium chelate compound. When the organic solvent is present the chelate compound is extracted; otherwise it is separated by filtration.

  6. Recovery of protactinium from molten fluoride nuclear fuel compositions

    DOEpatents

    Baes, C.F. Jr.; Bamberger, C.; Ross, R.G.

    1973-12-25

    A method is provided for separating protactinium from a molten fluonlde salt composition consisting essentially of at least one alkali and alkaline earth metal fluoride and at least one soluble fluoride of uranium or thorium which comprises oxidizing the protactinium in said composition to the + 5 oxidation state and contacting said composition with an oxide selected from the group consisting of an alkali metal oxide, an alkaline earth oxide, thorium oxide, and uranium oxide, and thereafter isolating the resultant insoluble protactinium oxide product from said composition. (Official Gazette)

  7. CATION EXCHANGE METHOD FOR THE RECOVERY OF PROTACTINIUM

    DOEpatents

    Studier, M.H.; Sullivan, J.C.

    1959-07-14

    A cation exchange prccess is described for separating protactinium values from thorium values whereby they are initially adsorbed together from an aqueous 0.1 to 2 N hydrochloric acid on a cation exchange resin in a column. Then selectively eluting the thorium by an ammonium sulfate solution and subsequently eluting the protactinium by an oxalate solution.

  8. Separation of Protactinium Employing Sulfur-Based Extraction Chromatographic Resins.

    PubMed

    Mastren, Tara; Stein, Benjamin W; Parker, T Gannon; Radchenko, Valery; Copping, Roy; Owens, Allison; Wyant, Lance E; Brugh, Mark; Kozimor, Stosh A; Nortier, F Meiring; Birnbaum, Eva R; John, Kevin D; Fassbender, Michael E

    2018-06-05

    Protactinium-230 ( t 1/2 = 17.4 d) is the parent isotope of 230 U ( t 1/2 = 20.8 d), a radionuclide of interest for targeted alpha therapy (TAT). Column chromatographic methods have been developed to separate no-carrier-added 230 Pa from proton irradiated thorium targets and accompanying fission products. Results reported within demonstrate the use of novel sulfur bearing chromatographic extraction resins for the selective separation of protactinium. The recovery yield of 230 Pa was 93 ± 4% employing a R 3 P═S type commercially available resin and 88 ± 4% employing a DGTA (diglycothioamide) containing custom synthesized extraction chromatographic resin. The radiochemical purity of the recovered 230 Pa was measured via high purity germanium γ-ray spectroscopy to be >99.5% with the remaining radioactive contaminant being 95 Nb due to its similar chemistry to protactinium. Measured equilibrium distribution coefficients for protactinium, thorium, uranium, niobium, radium, and actinium on both the R 3 P═S type and the DGTA resin in hydrochloric acid media are reported, to the best of our knowledge, for the first time.

  9. Separation of Protactinium Employing Sulfur-Based Extraction Chromatographic Resins

    DOE PAGES

    Mastren, Tara; Stein, Benjamin W.; Parker, T. Gannon; ...

    2018-05-14

    Protactinium-230 (t 1/2 = 17.4 d) is the parent isotope of 230U (t 1/2 = 20.8 d), a radionuclide of interest for targeted alpha therapy (TAT). Column chromatographic methods have been developed to separate no-carrier-added 230Pa from proton irradiated thorium targets and accompanying fission products. Results reported within this paper demonstrate the use of novel sulfur bearing chromatographic extraction resins for the selective separation of protactinium. The recovery yield of 230Pa was 93 ± 4% employing a R 3P=S type commercially available resin and 88 ± 4% employing a DGTA (diglycothioamide) containing custom synthesized extraction chromatographic resin. The radiochemical puritymore » of the recovered 230Pa was measured via high purity germanium γ-ray spectroscopy to be >99.5% with the remaining radioactive contaminant being 95Nb due to its similar chemistry to protactinium. Finally, measured equilibrium distribution coefficients for protactinium, thorium, uranium, niobium, radium, and actinium on both the R 3P=S type and the DGTA resin in hydrochloric acid media are reported, to the best of our knowledge, for the first time.« less

  10. Separation of Protactinium Employing Sulfur-Based Extraction Chromatographic Resins

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Mastren, Tara; Stein, Benjamin W.; Parker, T. Gannon

    Protactinium-230 (t 1/2 = 17.4 d) is the parent isotope of 230U (t 1/2 = 20.8 d), a radionuclide of interest for targeted alpha therapy (TAT). Column chromatographic methods have been developed to separate no-carrier-added 230Pa from proton irradiated thorium targets and accompanying fission products. Results reported within this paper demonstrate the use of novel sulfur bearing chromatographic extraction resins for the selective separation of protactinium. The recovery yield of 230Pa was 93 ± 4% employing a R 3P=S type commercially available resin and 88 ± 4% employing a DGTA (diglycothioamide) containing custom synthesized extraction chromatographic resin. The radiochemical puritymore » of the recovered 230Pa was measured via high purity germanium γ-ray spectroscopy to be >99.5% with the remaining radioactive contaminant being 95Nb due to its similar chemistry to protactinium. Finally, measured equilibrium distribution coefficients for protactinium, thorium, uranium, niobium, radium, and actinium on both the R 3P=S type and the DGTA resin in hydrochloric acid media are reported, to the best of our knowledge, for the first time.« less

  11. SEPARATION OF URANIUM FROM THORIUM AND PROTACTINIUM

    DOEpatents

    Musgrave, W.K.R.

    1959-06-30

    This patent relates to the separation of uranium from thorium and protactinium; such mixtures of elements usually being obtained by neutron irradiation of thorium. The method of separating the constituents has been first to dissolve the mixture of elements in concertrated nitric acid and then to remove the protactinium by absorption on manganese dioxide and the uranium by solvent extraction with ether. Prior to now, comparatively large amounts of thorium were extracted with the uranium. According to the invention this is completely prevented by adding sodium diethyldithiocarbamate to the mixture of soluble nitrate salts. The organic salt has the effect of reacting only with the uranyl nitrate to form the corresponding uranyl salt which can then be selectively extracted from the mixture with amyl acetate.

  12. SOLVENT EXTRACTION PROCESS FOR PROTACTINIUM

    DOEpatents

    Hyde, E.K.; Katzin, L.I.; Wolf, M.J.

    1961-04-01

    A process is described for separating protactinium from thorium present together as the nitrates in a 0.1 to 10 N nitric acid solution. The separation is carried out by extraction with an aliphatic alcohol, ketone, and/or ester having at least six carbon atoms, such as n-amyl acetate, 2-ethyl hexanol, and diisopropyl ketone.

  13. RECOVERY OF PROTACTINIUM

    DOEpatents

    Kraus, K.A.; Moore, G.E.

    1959-02-01

    A process is presented for the separation of protactinium values from an aqueous solution containing Pa and Th values comprising establishing in the solution a HCl concentration of from 4 to 11 molar, contacting the resulting solution with an anion-exchange adsorbent, such as a polystyrene divinyl benzene polymer with quatenary amines as the active exchange group, to effect the adsorption of Pa values upon the adsorbent while leaving Th values in the solution, and then washlng the separated Pa bearing adsorbent with an aqueous solution of HCl of less than 4M to exclusively elute Pa values from the adsorbent. If hexavalent U values are contained in the original solution thcy are adsorbed on the resin together with Pa. A separation is offected chromatographically by percolating the resin with aqueous HCl.

  14. SEPARATION OF PROTACTINIUM FROM MOLTEN SALT REACTOR FUEL COMPOSITIONS

    DOEpatents

    Shaffer, J.H.; Strain, J.E.; Cuneo, D.R.; Kelly, M.J.

    1963-11-12

    A method for selectively precipitating protactinium from a neutron- irradiated fused fluoride salt composition comprising at least one metal fluoride selected from the group consisting of an alkali metal fluoride and an alkaline earth metal fluoride containing dissolved thorium-232 values is presented. An inorganic metal oxide corresponding to any of the metal fluorides of the composition is also added. (AEC)

  15. PROCEEDINGS OF THE PROTACTINIUM CHEMISTRY SYMPOSIUM, GATLINBURG, TENNESSEE, APRIL 25-26, 1963

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    None

    1963-04-26

    Eleven papers are presented on the chemistry of protactinium. Most of the emphasis is on solvent extraction and solution chemistry. Separate abstracts were prepared for ten of the papers; the remaining paper was previously abstracted in NSA. (D.L.C.)

  16. SEPARATION OF POLONIUM, PROTACTINIUM OR MIXTURES THEREOF IN AQUEOUS SOLUTION FROM BISMUTH, LEAD, ZIRCONIUM AND/OR COLUMBIUM VALUES

    DOEpatents

    Van Winkle, Q.; Kraus, K.A.

    1959-10-27

    A process is presented for separating polonium, protactinium, or mixtures thereof in aqueous solution from bismuth, zirconium, lead, and niobium values contained in the solution. The method comprises providing hydrochloric acid in the solution in a concentration of at least 5N. contacting the aqueous solution with a substantially waterimmiscible organic solvent such as diisopropyl ketone, and separating the aqueous phase containing the bismuth, zirconium, lead, and niobium from the organic extract phase containing the polonium, protactinium, or mixture thereof.

  17. Isolation and purification of protactinium-231.

    PubMed

    Jerome, S M; Collins, S M; Happel, S; Ivanov, P; Russell, B C

    2018-04-01

    Protactinium-231 is one of the lesser known actinides, yet the measurement of this radionuclide is central to dating studies in both paleoclimate and nuclear forensics measurements; furthermore, it is important as the immediate parent nuclide of the 227 Ac decay chain. In this paper, we present the preparatory work for an upcoming CCRI(II) supplementary comparison of this radionuclide. The material used in this work was of poorly known provenance, and it was necessary to carry out a chemical purification of this material prior to use. A new extraction chromatography resin, TK 400, which has been developed for the separation of 231 Pa, was tested at NPL. The aims of the work were achieved; the recovery of 231 Pa was ~85%, the decay products were recovered in good yield (~95%) and stable element impurities were removed. Copyright © 2017. Published by Elsevier Ltd.

  18. 49 CFR Appendix B to Part 234 - Alternate Methods of Protection Under 49 CFR 234.105(c), 234.106, and 234.107(c)

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Protection Under 49 CFR 234.105(c), 234.106, and 234.107(c) [This is a summary—see body of text for complete... pair of lights designed to flash alternatively, one light does not work (and back-lights from other...

  19. First principles LDA + U and GGA + U study of protactinium and protactinium oxides: dependence on the effective U parameter

    NASA Astrophysics Data System (ADS)

    Obodo, K. O.; Chetty, N.

    2013-04-01

    The electronic structure and properties of protactinium and its oxides (PaO and PaO2) have been studied within the framework of the local density approximation (LDA), the Perdew-Burke-Ernzerhof generalized gradient approximation [GGA(PBE)], LDA + U and GGA(PBE) + U implementations of density functional theory. The dependence of selected observables of these materials on the effective U parameter has been investigated in detail. The examined properties include lattice constants, bulk moduli, the effect of charge density distributions, the hybridization of the 5f orbital and the energy of formation for PaO and PaO2. The LDA gives better agreement with experiment for the bulk modulus than the GGA for Pa but the GGA gives better structural properties. We found that PaO is metallic and PaO2 is a Mott-Hubbard insulator. This is consistent with observations for the other actinide oxides. We discover that GGA and LDA incorrectly give metallic behavior for PaO2. The GGA(PBE) + U calculated indirect band gap of 3.48 eV reported for PaO2 is a prediction and should stimulate further studies of this material.

  20. Protactinium and the intersection of actinide and transition metal chemistry

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Wilson, Richard E.; De Sio, Stephanie; Vallet, Valérie

    The role of the 5f and 6d orbitals in the chemistry of the actinide elements has been of considerable interest since their discovery and synthesis. Relativistic effects cause the energetics of the 5f and 6d orbitals to change as the actinide series is traversed left to right imparting a rich and complex chemistry. The 5f and 6d atomic states cross in energy at protactinium (Pa), making it a potential intersection between transition metal and actinide chemistries. Herein, we report the synthesis of a Pa-peroxo cluster, A(6)(Pa4O(O-2)(6)F-12) [A = Rb, Cs, (CH3)(4)N], formed in pursuit of an actinide polyoxometalate. Quantum chemicalmore » calculations at the density functional theory level demonstrate equal 5f and 6d orbital participation in the chemistry of Pa and increasing 5f orbital participation for the heavier actinides. Periodic changes in orbital character to the bonding in the early actinides highlights the influence of the 5f orbitals in their reactivity and chemical structure.« less

  1. 9 CFR 2.34 - [Reserved

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    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 9 Animals and Animal Products 1 2011-01-01 2011-01-01 false [Reserved] 2.34 Section 2.34 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE ANIMAL WELFARE REGULATIONS Research Facilities § 2.34 [Reserved] ...

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    Code of Federal Regulations, 2012 CFR

    2012-01-01

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    Code of Federal Regulations, 2013 CFR

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    Code of Federal Regulations, 2010 CFR

    2010-01-01

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  6. 48 CFR 234.003 - Responsibilities.

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    ... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Responsibilities. 234.003 Section 234.003 Federal Acquisition Regulations System DEFENSE ACQUISITION REGULATIONS SYSTEM, DEPARTMENT OF DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION 234.003 Responsibilities. DoDD...

  7. 40 CFR 415.234 - [Reserved

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  9. 49 CFR 234.3 - Application.

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    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Application. 234.3 Section 234.3 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS General § 234.3 Application. With the...

  10. 32 CFR 234.4 - Trespassing.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 2 2012-07-01 2012-07-01 false Trespassing. 234.4 Section 234.4 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.4 Trespassing. (a) Trespassing, entering, or remaining in or...

  11. 32 CFR 234.4 - Trespassing.

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  12. 32 CFR 234.4 - Trespassing.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 2 2013-07-01 2013-07-01 false Trespassing. 234.4 Section 234.4 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.4 Trespassing. (a) Trespassing, entering, or remaining in or...

  13. 32 CFR 234.4 - Trespassing.

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  14. 32 CFR 234.4 - Trespassing.

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  15. 14 CFR 234.3 - Applicability.

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  16. 14 CFR 234.12 - Waivers.

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  17. 32 CFR 234.16 - Gambling.

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  18. 32 CFR 234.16 - Gambling.

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  19. 32 CFR 234.16 - Gambling.

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  20. 32 CFR 234.16 - Gambling.

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  1. 32 CFR 234.16 - Gambling.

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  2. 49 CFR 234.317 - Compliance dates.

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    ... 49 Transportation 4 2012-10-01 2012-10-01 false Compliance dates. 234.317 Section 234.317... August 13, 2012, the railroad shall implement an ENS that conforms to this subpart no later than... August 13, 2012, the railroad shall comply with § 234.303 or § 234.307, respectively, no later than March...

  3. 32 CFR 234.10 - Weapons.

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    ... 32 National Defense 2 2012-07-01 2012-07-01 false Weapons. 234.10 Section 234.10 National Defense... PENTAGON RESERVATION § 234.10 Weapons. (a) Except as otherwise authorized under this section, the following are prohibited: (1) Possessing a weapon. (2) Carrying a weapon. (3) Using a weapon. (b) This section...

  4. 32 CFR 234.10 - Weapons.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 2 2013-07-01 2013-07-01 false Weapons. 234.10 Section 234.10 National Defense... PENTAGON RESERVATION § 234.10 Weapons. (a) Except as otherwise authorized under this section, the following are prohibited: (1) Possessing a weapon. (2) Carrying a weapon. (3) Using a weapon. (b) This section...

  5. 32 CFR 234.10 - Weapons.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Weapons. 234.10 Section 234.10 National Defense... PENTAGON RESERVATION § 234.10 Weapons. (a) Except as otherwise authorized under this section, the following are prohibited: (1) Possessing a weapon. (2) Carrying a weapon. (3) Using a weapon. (b) This section...

  6. 32 CFR 234.10 - Weapons.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 2 2014-07-01 2014-07-01 false Weapons. 234.10 Section 234.10 National Defense... PENTAGON RESERVATION § 234.10 Weapons. (a) Except as otherwise authorized under this section, the following are prohibited: (1) Possessing a weapon. (2) Carrying a weapon. (3) Using a weapon. (b) This section...

  7. 32 CFR 234.10 - Weapons.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 2 2011-07-01 2011-07-01 false Weapons. 234.10 Section 234.10 National Defense... PENTAGON RESERVATION § 234.10 Weapons. (a) Except as otherwise authorized under this section, the following are prohibited: (1) Possessing a weapon. (2) Carrying a weapon. (3) Using a weapon. (b) This section...

  8. 49 CFR 234.6 - Penalties.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Penalties. 234.6 Section 234.6 Transportation... TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS General § 234.6 Penalties. (a) Civil penalty. Any person (an entity of any type covered under 1 U.S.C. 1, including but not limited to the...

  9. 49 CFR 234.6 - Penalties.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Penalties. 234.6 Section 234.6 Transportation... TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS General § 234.6 Penalties. (a) Civil penalty. Any person (an entity of any type covered under 1 U.S.C. 1, including but not limited to the...

  10. 49 CFR 234.301 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.301 Definitions. As used in this subpart— Answering... message to report an unsafe condition at a highway-rail or pathway grade crossing, as described in § 234... unsafe condition at a highway-rail or pathway grade crossing, as described in § 234.303(c) and (d), and...

  11. 49 CFR 234.301 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.301 Definitions. As used in this subpart— Answering... message to report an unsafe condition at a highway-rail or pathway grade crossing, as described in § 234... unsafe condition at a highway-rail or pathway grade crossing, as described in § 234.303(c) and (d), and...

  12. 49 CFR 234.301 - Definitions.

    Code of Federal Regulations, 2013 CFR

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    ... at Highway-Rail and Pathway Grade Crossings § 234.301 Definitions. As used in this subpart— Answering... message to report an unsafe condition at a highway-rail or pathway grade crossing, as described in § 234... unsafe condition at a highway-rail or pathway grade crossing, as described in § 234.303(c) and (d), and...

  13. 49 CFR 234.6 - Penalties.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... death or injury to persons, or has caused death or injury, a penalty not to exceed $105,000 per... 49 Transportation 4 2012-10-01 2012-10-01 false Penalties. 234.6 Section 234.6 Transportation... SYSTEMS General § 234.6 Penalties. (a) Civil penalty. Any person (an entity of any type covered under 1 U...

  14. 49 CFR 234.6 - Penalties.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... death or injury to persons, or has caused death or injury, a penalty not to exceed $105,000 per... 49 Transportation 4 2014-10-01 2014-10-01 false Penalties. 234.6 Section 234.6 Transportation... SYSTEMS General § 234.6 Penalties. (a) Civil penalty. Any person (an entity of any type covered under 1 U...

  15. 49 CFR 234.6 - Penalties.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... death or injury to persons, or has caused death or injury, a penalty not to exceed $105,000 per... 49 Transportation 4 2013-10-01 2013-10-01 false Penalties. 234.6 Section 234.6 Transportation... SYSTEMS General § 234.6 Penalties. (a) Civil penalty. Any person (an entity of any type covered under 1 U...

  16. 49 CFR 234.317 - Compliance dates.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... the information required in § 234.309(b)(1) and (b)(3), and greater than or equal to 3/8 inch for the...), or less than 3/8 inch for the information required in § 234.309(b)(2) on August 13, 2012, the... 49 Transportation 4 2014-10-01 2014-10-01 false Compliance dates. 234.317 Section 234.317...

  17. 49 CFR 234.317 - Compliance dates.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... the information required in § 234.309(b)(1) and (b)(3), and greater than or equal to 3/8 inch for the...), or less than 3/8 inch for the information required in § 234.309(b)(2) on August 13, 2012, the... 49 Transportation 4 2013-10-01 2013-10-01 false Compliance dates. 234.317 Section 234.317...

  18. 49 CFR 234.203 - Control circuits.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Control circuits. 234.203 Section 234.203 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION..., Inspection, and Testing Maintenance Standards § 234.203 Control circuits. All control circuits that affect...

  19. 49 CFR 234.203 - Control circuits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Control circuits. 234.203 Section 234.203 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION..., Inspection, and Testing Maintenance Standards § 234.203 Control circuits. All control circuits that affect...

  20. 49 CFR 234.251 - Standby power.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Standby power. 234.251 Section 234.251 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION..., Inspection, and Testing Inspections and Tests § 234.251 Standby power. Standby power shall be tested at least...

  1. 49 CFR 234.251 - Standby power.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Standby power. 234.251 Section 234.251 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION..., Inspection, and Testing Inspections and Tests § 234.251 Standby power. Standby power shall be tested at least...

  2. 49 CFR 234.249 - Ground tests.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Ground tests. 234.249 Section 234.249 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION..., Inspection, and Testing Inspections and Tests § 234.249 Ground tests. A test for grounds on each energy bus...

  3. 49 CFR 234.249 - Ground tests.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Ground tests. 234.249 Section 234.249 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION..., Inspection, and Testing Inspections and Tests § 234.249 Ground tests. A test for grounds on each energy bus...

  4. 49 CFR 234.203 - Control circuits.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Control circuits. 234.203 Section 234.203... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.203 Control circuits. All control circuits that affect the safe operation of a highway-rail grade crossing warning...

  5. 49 CFR 234.203 - Control circuits.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Control circuits. 234.203 Section 234.203... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.203 Control circuits. All control circuits that affect the safe operation of a highway-rail grade crossing warning...

  6. 49 CFR 234.259 - Warning time.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 12 months and when the warning system is modified because of a change in train speeds. Electronic... 49 Transportation 4 2014-10-01 2014-10-01 false Warning time. 234.259 Section 234.259... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.259 Warning...

  7. 49 CFR 234.259 - Warning time.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 12 months and when the warning system is modified because of a change in train speeds. Electronic... 49 Transportation 4 2012-10-01 2012-10-01 false Warning time. 234.259 Section 234.259... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.259 Warning...

  8. 49 CFR 234.259 - Warning time.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... modified because of a change in train speeds. Electronic devices that accurately determine actual warning... 49 Transportation 4 2011-10-01 2011-10-01 false Warning time. 234.259 Section 234.259..., Inspection, and Testing Inspections and Tests § 234.259 Warning time. Each crossing warning system shall be...

  9. 49 CFR 234.259 - Warning time.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 12 months and when the warning system is modified because of a change in train speeds. Electronic... 49 Transportation 4 2013-10-01 2013-10-01 false Warning time. 234.259 Section 234.259... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.259 Warning...

  10. 49 CFR 234.259 - Warning time.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... modified because of a change in train speeds. Electronic devices that accurately determine actual warning... 49 Transportation 4 2010-10-01 2010-10-01 false Warning time. 234.259 Section 234.259..., Inspection, and Testing Inspections and Tests § 234.259 Warning time. Each crossing warning system shall be...

  11. 8 CFR 234.2 - Landing requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 8 Aliens and Nationality 1 2014-01-01 2014-01-01 false Landing requirements. 234.2 Section 234.2 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.2 Landing requirements. (a) Place of landing. Aircraft...

  12. 8 CFR 234.2 - Landing requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 8 Aliens and Nationality 1 2011-01-01 2011-01-01 false Landing requirements. 234.2 Section 234.2 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.2 Landing requirements. (a) Place of landing. Aircraft...

  13. 8 CFR 234.2 - Landing requirements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 8 Aliens and Nationality 1 2013-01-01 2013-01-01 false Landing requirements. 234.2 Section 234.2 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.2 Landing requirements. (a) Place of landing. Aircraft...

  14. 8 CFR 234.2 - Landing requirements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 8 Aliens and Nationality 1 2012-01-01 2012-01-01 false Landing requirements. 234.2 Section 234.2 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.2 Landing requirements. (a) Place of landing. Aircraft...

  15. 8 CFR 234.2 - Landing requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 8 Aliens and Nationality 1 2010-01-01 2010-01-01 false Landing requirements. 234.2 Section 234.2 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.2 Landing requirements. (a) Place of landing. Aircraft...

  16. 49 CFR 234.249 - Ground tests.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Ground tests. 234.249 Section 234.249... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.249 Ground tests. A test for grounds on each energy bus furnishing power to circuits that affect the safety of...

  17. 49 CFR 234.221 - Lamp voltage.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Lamp voltage. 234.221 Section 234.221... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.221 Lamp voltage. The voltage at each lamp shall be maintained at not less than 85 percent of the prescribed rating...

  18. 49 CFR 234.221 - Lamp voltage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Lamp voltage. 234.221 Section 234.221..., Inspection, and Testing Maintenance Standards § 234.221 Lamp voltage. The voltage at each lamp shall be maintained at not less than 85 percent of the prescribed rating for the lamp. ...

  19. 49 CFR 234.221 - Lamp voltage.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Lamp voltage. 234.221 Section 234.221... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.221 Lamp voltage. The voltage at each lamp shall be maintained at not less than 85 percent of the prescribed rating...

  20. 49 CFR 234.221 - Lamp voltage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Lamp voltage. 234.221 Section 234.221..., Inspection, and Testing Maintenance Standards § 234.221 Lamp voltage. The voltage at each lamp shall be maintained at not less than 85 percent of the prescribed rating for the lamp. ...

  1. 49 CFR 234.221 - Lamp voltage.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Lamp voltage. 234.221 Section 234.221... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.221 Lamp voltage. The voltage at each lamp shall be maintained at not less than 85 percent of the prescribed rating...

  2. 20 CFR 234.33 - Survivor annuities.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Survivor annuities. 234.33 Section 234.33 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD RETIREMENT ACT LUMP-SUM PAYMENTS Annuities Due but Unpaid at Death § 234.33 Survivor annuities. Any survivor annuity which is...

  3. 14 CFR 234.7 - Voluntary reporting.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Voluntary reporting. 234.7 Section 234.7 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.7 Voluntary reporting. (a) In addition to the...

  4. 40 CFR 52.234 - Source surveillance.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 3 2011-07-01 2011-07-01 false Source surveillance. 52.234 Section 52.234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS California § 52.234 Source surveillance. (a) Except in the Air Pollution Control Districts (APCDs)...

  5. 40 CFR 52.234 - Source surveillance.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 3 2013-07-01 2013-07-01 false Source surveillance. 52.234 Section 52.234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS California § 52.234 Source surveillance. (a) Except in the Air Pollution Control Districts (APCDs)...

  6. 40 CFR 52.234 - Source surveillance.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 3 2010-07-01 2010-07-01 false Source surveillance. 52.234 Section 52.234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS California § 52.234 Source surveillance. (a) Except in the Air Pollution Control Districts (APCDs)...

  7. 40 CFR 52.234 - Source surveillance.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 3 2014-07-01 2014-07-01 false Source surveillance. 52.234 Section 52.234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS California § 52.234 Source surveillance. (a) Except in the Air Pollution Control Districts (APCDs)...

  8. 40 CFR 52.234 - Source surveillance.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 3 2012-07-01 2012-07-01 false Source surveillance. 52.234 Section 52.234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS California § 52.234 Source surveillance. (a) Except in the Air Pollution Control Districts (APCDs)...

  9. 49 CFR 234.231 - Fouling wires.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Fouling wires. 234.231 Section 234.231..., Inspection, and Testing Maintenance Standards § 234.231 Fouling wires. Each set of fouling wires in a highway... single duplex wire with single plug acting as fouling wires is prohibited. Existing installations having...

  10. 49 CFR 234.231 - Fouling wires.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Fouling wires. 234.231 Section 234.231..., Inspection, and Testing Maintenance Standards § 234.231 Fouling wires. Each set of fouling wires in a highway... single duplex wire with single plug acting as fouling wires is prohibited. Existing installations having...

  11. 7 CFR 966.234 - Assessment rate.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 8 2014-01-01 2014-01-01 false Assessment rate. 966.234 Section 966.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... Rates § 966.234 Assessment rate. On and after August 1, 2012, an assessment rate of $0.024 per 25-pound...

  12. 25 CFR 23.4 - Information collection.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Information collection. 23.4 Section 23.4 Indians BUREAU..., Definitions, and Policy § 23.4 Information collection. (a) The information collection requirements contained....C. 3501 et seq., and assigned clearance number 1076-0111. (1) This information will be used to...

  13. 49 CFR 234.223 - Gate arm.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Gate arm. 234.223 Section 234.223 Transportation... SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.223 Gate arm. Each gate arm, when... maintained in a condition sufficient to be clearly viewed by approaching highway users. Each gate arm shall...

  14. 49 CFR 234.223 - Gate arm.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Gate arm. 234.223 Section 234.223 Transportation... SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.223 Gate arm. Each gate arm, when... maintained in a condition sufficient to be clearly viewed by approaching highway users. Each gate arm shall...

  15. 49 CFR 234.223 - Gate arm.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Gate arm. 234.223 Section 234.223 Transportation... SYSTEMS Maintenance, Inspection, and Testing Maintenance Standards § 234.223 Gate arm. Each gate arm, when... maintained in a condition sufficient to be clearly viewed by approaching highway users. Each gate arm shall...

  16. 49 CFR 234.223 - Gate arm.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Gate arm. 234.223 Section 234.223 Transportation... Maintenance Standards § 234.223 Gate arm. Each gate arm, when in the downward position, shall extend across... clearly viewed by approaching highway users. Each gate arm shall start its downward motion not less than...

  17. 49 CFR 234.223 - Gate arm.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Gate arm. 234.223 Section 234.223 Transportation... Maintenance Standards § 234.223 Gate arm. Each gate arm, when in the downward position, shall extend across... clearly viewed by approaching highway users. Each gate arm shall start its downward motion not less than...

  18. 50 CFR 648.234 - Gear restrictions. [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 50 Wildlife and Fisheries 8 2010-10-01 2010-10-01 false Gear restrictions. [Reserved] 648.234 Section 648.234 Wildlife and Fisheries FISHERY CONSERVATION AND MANAGEMENT, NATIONAL OCEANIC AND... Measures for the Spiny Dogfish Fishery § 648.234 Gear restrictions. [Reserved] ...

  19. 7 CFR 1221.234 - Confidentiality

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 10 2014-01-01 2014-01-01 false Confidentiality 1221.234 Section 1221.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... persons voting in the referendum and ballots shall be confidential and the contents of the ballots shall...

  20. 7 CFR 1221.234 - Confidentiality

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 10 2012-01-01 2012-01-01 false Confidentiality 1221.234 Section 1221.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... persons voting in the referendum and ballots shall be confidential and the contents of the ballots shall...

  1. 7 CFR 1221.234 - Confidentiality

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 10 2013-01-01 2013-01-01 false Confidentiality 1221.234 Section 1221.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... persons voting in the referendum and ballots shall be confidential and the contents of the ballots shall...

  2. 7 CFR 1221.234 - Confidentiality

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 10 2011-01-01 2011-01-01 false Confidentiality 1221.234 Section 1221.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... persons voting in the referendum and ballots shall be confidential and the contents of the ballots shall...

  3. 24 CFR 234.63 - Location of property.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 2 2010-04-01 2010-04-01 false Location of property. 234.63 Section 234.63 Housing and Urban Development Regulations Relating to Housing and Urban Development... CONDOMINIUM OWNERSHIP MORTGAGE INSURANCE Eligibility Requirements-Individually Owned Units § 234.63 Location...

  4. 32 CFR 234.8 - Preservation of property.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Preservation of property. 234.8 Section 234.8 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.8 Preservation of property. Willfully destroying or...

  5. 14 CFR 234.11 - Disclosure to consumers.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Disclosure to consumers. 234.11 Section 234.11 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.11 Disclosure to consumers. Link to...

  6. 49 CFR 234.269 - Cut-out circuits.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.269 Cut-out... overrides the operation of automatic warning systems. This includes both switch cut-out circuits and devices... 49 Transportation 4 2013-10-01 2013-10-01 false Cut-out circuits. 234.269 Section 234.269...

  7. 49 CFR 234.269 - Cut-out circuits.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.269 Cut-out... overrides the operation of automatic warning systems. This includes both switch cut-out circuits and devices... 49 Transportation 4 2014-10-01 2014-10-01 false Cut-out circuits. 234.269 Section 234.269...

  8. 49 CFR 234.269 - Cut-out circuits.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.269 Cut-out... overrides the operation of automatic warning systems. This includes both switch cut-out circuits and devices... 49 Transportation 4 2012-10-01 2012-10-01 false Cut-out circuits. 234.269 Section 234.269...

  9. 10 CFR 72.234 - Conditions of approval.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Conditions of approval. 72.234 Section 72.234 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSING REQUIREMENTS FOR THE INDEPENDENT STORAGE OF SPENT... Spent Fuel Storage Casks § 72.234 Conditions of approval. (a) The certificate holder and applicant for a...

  10. 24 CFR 234.65 - Nature of title.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 2 2011-04-01 2011-04-01 false Nature of title. 234.65 Section 234.65 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued... OWNERSHIP MORTGAGE INSURANCE Eligibility Requirements-Individually Owned Units § 234.65 Nature of title. A...

  11. 49 CFR 234.257 - Warning system operation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Warning system operation. 234.257 Section 234.257... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.257 Warning system operation. (a) Each highway-rail crossing warning system shall be tested to determine that it...

  12. 49 CFR 234.257 - Warning system operation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Warning system operation. 234.257 Section 234.257... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.257 Warning system operation. (a) Each highway-rail crossing warning system shall be tested to determine that it...

  13. 49 CFR 234.257 - Warning system operation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Warning system operation. 234.257 Section 234.257... EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.257 Warning system operation. (a) Each highway-rail crossing warning system shall be tested to determine that it...

  14. 32 CFR 234.12 - Restriction on animals.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 2 2014-07-01 2014-07-01 false Restriction on animals. 234.12 Section 234.12 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.12 Restriction on animals. Animals, except guide dogs...

  15. 32 CFR 234.12 - Restriction on animals.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 2 2011-07-01 2011-07-01 false Restriction on animals. 234.12 Section 234.12 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.12 Restriction on animals. Animals, except guide dogs...

  16. 32 CFR 234.12 - Restriction on animals.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 2 2013-07-01 2013-07-01 false Restriction on animals. 234.12 Section 234.12 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.12 Restriction on animals. Animals, except guide dogs...

  17. 32 CFR 234.12 - Restriction on animals.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Restriction on animals. 234.12 Section 234.12 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.12 Restriction on animals. Animals, except guide dogs...

  18. 32 CFR 234.12 - Restriction on animals.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 2 2012-07-01 2012-07-01 false Restriction on animals. 234.12 Section 234.12 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.12 Restriction on animals. Animals, except guide dogs...

  19. 14 CFR 234.5 - Form of reports.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Form of reports. 234.5 Section 234.5 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.5 Form of reports. Except where otherwise noted...

  20. 24 CFR 234.65 - Nature of title.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 2 2010-04-01 2010-04-01 false Nature of title. 234.65 Section 234.65 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued... OWNERSHIP MORTGAGE INSURANCE Eligibility Requirements-Individually Owned Units § 234.65 Nature of title. A...

  1. 24 CFR 234.65 - Nature of title.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 2 2014-04-01 2014-04-01 false Nature of title. 234.65 Section 234.65 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued... OWNERSHIP MORTGAGE INSURANCE Eligibility Requirements-Individually Owned Units § 234.65 Nature of title. A...

  2. 24 CFR 234.65 - Nature of title.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 2 2012-04-01 2012-04-01 false Nature of title. 234.65 Section 234.65 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued... OWNERSHIP MORTGAGE INSURANCE Eligibility Requirements-Individually Owned Units § 234.65 Nature of title. A...

  3. 24 CFR 234.65 - Nature of title.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 2 2013-04-01 2013-04-01 false Nature of title. 234.65 Section 234.65 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued... OWNERSHIP MORTGAGE INSURANCE Eligibility Requirements-Individually Owned Units § 234.65 Nature of title. A...

  4. 49 CFR 234.201 - Location of plans.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Location of plans. 234.201 Section 234.201..., Inspection, and Testing Maintenance Standards § 234.201 Location of plans. Plans required for proper maintenance and testing shall be kept at each highway-rail grade crossing warning system location. Plans shall...

  5. 49 CFR 234.227 - Train detection apparatus.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Train detection apparatus. 234.227 Section 234.227..., Inspection, and Testing Maintenance Standards § 234.227 Train detection apparatus. (a) Train detection apparatus shall be maintained to detect a train or railcar in any part of a train detection circuit, in...

  6. 49 CFR 234.227 - Train detection apparatus.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Train detection apparatus. 234.227 Section 234.227..., Inspection, and Testing Maintenance Standards § 234.227 Train detection apparatus. (a) Train detection apparatus shall be maintained to detect a train or railcar in any part of a train detection circuit, in...

  7. 49 CFR 234.217 - Flashing light units.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Flashing light units. 234.217 Section 234.217..., Inspection, and Testing Maintenance Standards § 234.217 Flashing light units. (a) Each flashing light unit.... (b) Each flashing light unit shall be maintained to prevent dust and moisture from entering the...

  8. 49 CFR 234.217 - Flashing light units.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Flashing light units. 234.217 Section 234.217..., Inspection, and Testing Maintenance Standards § 234.217 Flashing light units. (a) Each flashing light unit.... (b) Each flashing light unit shall be maintained to prevent dust and moisture from entering the...

  9. 49 CFR 234.269 - Cut-out circuits.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Cut-out circuits. 234.269 Section 234.269..., Inspection, and Testing Inspections and Tests § 234.269 Cut-out circuits. Each cut-out circuit shall be... of this section, a cut-out circuit is any circuit which overrides the operation of automatic warning...

  10. 49 CFR 234.257 - Warning system operation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Warning system operation. 234.257 Section 234.257..., Inspection, and Testing Inspections and Tests § 234.257 Warning system operation. (a) Each highway-rail crossing warning system shall be tested to determine that it functions as intended when it is placed in...

  11. 49 CFR 234.257 - Warning system operation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Warning system operation. 234.257 Section 234.257..., Inspection, and Testing Inspections and Tests § 234.257 Warning system operation. (a) Each highway-rail crossing warning system shall be tested to determine that it functions as intended when it is placed in...

  12. 49 CFR 234.269 - Cut-out circuits.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Cut-out circuits. 234.269 Section 234.269..., Inspection, and Testing Inspections and Tests § 234.269 Cut-out circuits. Each cut-out circuit shall be... of this section, a cut-out circuit is any circuit which overrides the operation of automatic warning...

  13. 49 CFR 234.315 - Electronic recordkeeping.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Electronic recordkeeping. 234.315 Section 234.315 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION... railroad adequately limits and controls accessibility to the records retained in its electronic database...

  14. 49 CFR 234.315 - Electronic recordkeeping.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Electronic recordkeeping. 234.315 Section 234.315 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION... railroad adequately limits and controls accessibility to the records retained in its electronic database...

  15. 49 CFR 234.315 - Electronic recordkeeping.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Electronic recordkeeping. 234.315 Section 234.315 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION... railroad adequately limits and controls accessibility to the records retained in its electronic database...

  16. 49 CFR 384.234 - Driver medical certification recordkeeping.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 5 2013-10-01 2013-10-01 false Driver medical certification recordkeeping. 384.234 Section 384.234 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL... Compliance by States § 384.234 Driver medical certification recordkeeping. The State must meet the medical...

  17. 49 CFR 384.234 - Driver medical certification recordkeeping.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 5 2012-10-01 2012-10-01 false Driver medical certification recordkeeping. 384.234 Section 384.234 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL... Compliance by States § 384.234 Driver medical certification recordkeeping. The State must meet the medical...

  18. 49 CFR 384.234 - Driver medical certification recordkeeping.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 5 2010-10-01 2010-10-01 false Driver medical certification recordkeeping. 384.234 Section 384.234 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL... Compliance by States § 384.234 Driver medical certification recordkeeping. The State must meet the medical...

  19. 49 CFR 384.234 - Driver medical certification recordkeeping.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 5 2011-10-01 2011-10-01 false Driver medical certification recordkeeping. 384.234 Section 384.234 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL... Compliance by States § 384.234 Driver medical certification recordkeeping. The State must meet the medical...

  20. 7 CFR 966.234 - Assessment rate.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 8 2011-01-01 2011-01-01 false Assessment rate. 966.234 Section 966.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE TOMATOES GROWN IN FLORIDA Assessment...

  1. 7 CFR 966.234 - Assessment rate.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 8 2013-01-01 2013-01-01 false Assessment rate. 966.234 Section 966.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE TOMATOES GROWN IN FLORIDA Assessment...

  2. 7 CFR 916.234 - Assessment rate.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 8 2011-01-01 2011-01-01 false Assessment rate. 916.234 Section 916.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE NECTARINES GROWN IN CALIFORNIA...

  3. 7 CFR 966.234 - Assessment rate.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 8 2012-01-01 2012-01-01 false Assessment rate. 966.234 Section 966.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE TOMATOES GROWN IN FLORIDA Assessment...

  4. 7 CFR 966.234 - Assessment rate.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Assessment rate. 966.234 Section 966.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE TOMATOES GROWN IN FLORIDA Assessment...

  5. 7 CFR 916.234 - Assessment rate.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Assessment rate. 916.234 Section 916.234 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE NECTARINES GROWN IN CALIFORNIA...

  6. 49 CFR 234.105 - Activation failure.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Activation failure. 234.105 Section 234.105 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response to Reports...

  7. 49 CFR 234.107 - False activation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false False activation. 234.107 Section 234.107 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response to Reports...

  8. 49 CFR 234.106 - Partial activation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Partial activation. 234.106 Section 234.106 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response to Reports...

  9. 49 CFR 234.106 - Partial activation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Partial activation. 234.106 Section 234.106 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response to Reports...

  10. 49 CFR 234.105 - Activation failure.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Activation failure. 234.105 Section 234.105 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response to Reports...

  11. 49 CFR 234.107 - False activation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false False activation. 234.107 Section 234.107 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response to Reports...

  12. 49 CFR 234.233 - Rail joints.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Rail joints. 234.233 Section 234.233 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION... than joint bars and the bonds shall be maintained in such condition to ensure electrical conductivity. ...

  13. 48 CFR 234.203 - Solicitation provisions and contract clause.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... accordance with 234.201(1)(iii) and (iv)— (1) Use the provision at 252.234-7001, Notice of Earned Value... solicitation; and (2) Use the clause at 252.234-7002, Earned Value Management System, instead of the clause at... ACQUISITION Earned Value Management System 234.203 Solicitation provisions and contract clause. For cost or...

  14. 32 CFR 234.6 - Interfering with agency functions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Interfering with agency functions. 234.6 Section 234.6 National Defense Department of Defense (Continued) OFFICE OF THE SECRETARY OF DEFENSE (CONTINUED) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.6 Interfering with agency functions. The following are...

  15. 22 CFR 23.4 - Representative value in exchange.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Representative value in exchange. 23.4 Section 23.4 Foreign Relations DEPARTMENT OF STATE FEES AND FUNDS FINANCE AND ACCOUNTING § 23.4 Representative value in exchange. Representative value in exchange for the collection of a fee means foreign...

  16. 49 CFR 234.225 - Activation of warning system.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Activation of warning system. 234.225 Section 234... Maintenance, Inspection, and Testing Maintenance Standards § 234.225 Activation of warning system. A highway-rail grade crossing warning system shall be maintained to activate in accordance with the design of the...

  17. 49 CFR 234.225 - Activation of warning system.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Activation of warning system. 234.225 Section 234... Maintenance, Inspection, and Testing Maintenance Standards § 234.225 Activation of warning system. A highway-rail grade crossing warning system shall be maintained to activate in accordance with the design of the...

  18. 21 CFR 522.234 - Butamisole hydrochloride.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 6 2010-04-01 2010-04-01 false Butamisole hydrochloride. 522.234 Section 522.234 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) ANIMAL... a solution consisting of 70 percent propylene glycol, 4 percent benzyl alcohol and distilled water...

  19. 32 CFR 234.17 - Vehicles and traffic safety.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 2 2014-07-01 2014-07-01 false Vehicles and traffic safety. 234.17 Section 234...) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.17 Vehicles and traffic safety. (a) In general. Unless specifically addressed by regulations in this part, traffic and the use of vehicles within the Pentagon...

  20. 32 CFR 234.17 - Vehicles and traffic safety.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 2 2012-07-01 2012-07-01 false Vehicles and traffic safety. 234.17 Section 234...) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.17 Vehicles and traffic safety. (a) In general. Unless specifically addressed by regulations in this part, traffic and the use of vehicles within the Pentagon...

  1. 32 CFR 234.17 - Vehicles and traffic safety.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 2 2011-07-01 2011-07-01 false Vehicles and traffic safety. 234.17 Section 234...) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.17 Vehicles and traffic safety. (a) In general. Unless specifically addressed by regulations in this part, traffic and the use of vehicles within the Pentagon...

  2. 32 CFR 234.17 - Vehicles and traffic safety.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 2 2010-07-01 2010-07-01 false Vehicles and traffic safety. 234.17 Section 234...) MISCELLANEOUS CONDUCT ON THE PENTAGON RESERVATION § 234.17 Vehicles and traffic safety. (a) In general. Unless specifically addressed by regulations in this part, traffic and the use of vehicles within the Pentagon...

  3. 27 CFR 41.234 - Corporate documents.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2012-04-01 2011-04-01 true Corporate documents. 41.234... Tobacco § 41.234 Corporate documents. Every corporation that files an application for a permit as an... copy of the corporate charter or a certificate of corporate existence or incorporation executed by the...

  4. 46 CFR 153.234 - Fore and aft location.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Containment Systems § 153.234 Fore and aft location. Except as allowed in § 153.7, each ship must meet the... 46 Shipping 5 2014-10-01 2014-10-01 false Fore and aft location. 153.234 Section 153.234 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) CERTAIN BULK DANGEROUS CARGOES SHIPS CARRYING...

  5. 49 CFR 234.101 - Employee notification rules.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Employee notification rules. 234.101 Section 234.101 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response...

  6. 49 CFR 234.101 - Employee notification rules.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Employee notification rules. 234.101 Section 234.101 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response...

  7. 30 CFR 285.233-285.234 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ....234 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process §§ 285.233-285.234 [Reserved] Commercial and Limited...

  8. An Empirical Method for Determining 234U Percentage

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Miko, David K.

    2015-11-02

    When isotopic information for uranium is provided, the concentration of 234U is frequently neglected. Often the isotopic content is given as a percentage of 235U with the assumption that the remainder consists of 238U. In certain applications, such as heat output, the concentration of 234U can be a significant contributing factor. For situations where only the 235U and 238U values are given, a simple way to calculate the 234U component would be beneficial. The approach taken here is empirical. A series of uranium standards with varying enrichments were analyzed. The 234U and 235U data were fit using a second ordermore » polynomial.« less

  9. 24 CFR 234.259 - Claim procedure-graduated payment mortgages.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 2 2013-04-01 2013-04-01 false Claim procedure-graduated payment mortgages. 234.259 Section 234.259 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.259 Claim procedure—graduated payment mortgages. Section 203.436 of this chapter applies to...

  10. 24 CFR 234.259 - Claim procedure-graduated payment mortgages.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 2 2011-04-01 2011-04-01 false Claim procedure-graduated payment mortgages. 234.259 Section 234.259 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.259 Claim procedure—graduated payment mortgages. Section 203.436 of this chapter applies to...

  11. 24 CFR 234.259 - Claim procedure-graduated payment mortgages.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 2 2010-04-01 2010-04-01 false Claim procedure-graduated payment mortgages. 234.259 Section 234.259 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.259 Claim procedure—graduated payment mortgages. Section 203.436 of this chapter applies to...

  12. 24 CFR 234.259 - Claim procedure-graduated payment mortgages.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 2 2012-04-01 2012-04-01 false Claim procedure-graduated payment mortgages. 234.259 Section 234.259 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.259 Claim procedure—graduated payment mortgages. Section 203.436 of this chapter applies to...

  13. 24 CFR 234.259 - Claim procedure-graduated payment mortgages.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 2 2014-04-01 2014-04-01 false Claim procedure-graduated payment mortgages. 234.259 Section 234.259 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.259 Claim procedure—graduated payment mortgages. Section 203.436 of this chapter applies to...

  14. 14 CFR 234.4 - Reporting of on-time performance.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Reporting of on-time performance. 234.4 Section 234.4 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.4 Reporting of on-time...

  15. 30 CFR 285.233-285.234 - [Reserved

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ....234 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process §§ 285.233-285.234...

  16. 30 CFR 585.233-585.234 - [Reserved

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ....234 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process §§ 585.233-585.234 [Reserved] Commercial and Limited...

  17. 30 CFR 585.233-585.234 - [Reserved

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ....234 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process §§ 585.233-585.234 [Reserved] Commercial and Limited...

  18. 30 CFR 585.233-585.234 - [Reserved

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ....234 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process §§ 585.233-585.234 [Reserved] Commercial and Limited...

  19. 14 CFR 234.6 - Baggage-handling statistics.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 4 2011-01-01 2011-01-01 false Baggage-handling statistics. 234.6 Section 234.6 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION... statistics. Each reporting carrier shall report monthly to the Department on a domestic system basis...

  20. 14 CFR 234.6 - Baggage-handling statistics.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Baggage-handling statistics. 234.6 Section 234.6 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION... statistics. Each reporting carrier shall report monthly to the Department on a domestic system basis...

  1. 24 CFR 234.270 - Condition of the multifamily structure.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 2 2011-04-01 2011-04-01 false Condition of the multifamily structure. 234.270 Section 234.270 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.270 Condition of the multifamily structure. (a) When a family unit is conveyed or a mortgage is...

  2. 24 CFR 234.270 - Condition of the multifamily structure.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 2 2014-04-01 2014-04-01 false Condition of the multifamily structure. 234.270 Section 234.270 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.270 Condition of the multifamily structure. (a) When a family unit is conveyed or a mortgage is...

  3. 24 CFR 234.270 - Condition of the multifamily structure.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 2 2012-04-01 2012-04-01 false Condition of the multifamily structure. 234.270 Section 234.270 Housing and Urban Development Regulations Relating to Housing and Urban... § 234.270 Condition of the multifamily structure. (a) When a family unit is conveyed or a mortgage is...

  4. 48 CFR 234.7101 - Solicitation provision and contract clause.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Software Data Reporting 234.7101 Solicitation provision and contract clause. (a)(1) Use the provision at 252.234-7003, Notice of Cost and Software Data Reporting System, in all solicitations that include the clause at 252.234-7004, Cost and Software Data Reporting. (2) Use the provision with its Alternate I when...

  5. 48 CFR 234.7101 - Solicitation provision and contract clause.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Software Data Reporting 234.7101 Solicitation provision and contract clause. (a)(1) Use the provision at 252.234-7003, Notice of Cost and Software Data Reporting System, in all solicitations that include the clause at 252.234-7004, Cost and Software Data Reporting. (2) Use the provision with its Alternate I when...

  6. 48 CFR 234.7101 - Solicitation provision and contract clause.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Software Data Reporting 234.7101 Solicitation provision and contract clause. (a)(1) Use the provision at 252.234-7003, Notice of Cost and Software Data Reporting System, in all solicitations that include the clause at 252.234-7004, Cost and Software Data Reporting. (2) Use the provision with its Alternate I when...

  7. 48 CFR 234.7101 - Solicitation provision and contract clause.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Software Data Reporting 234.7101 Solicitation provision and contract clause. (a)(1) Use the provision at 252.234-7003, Notice of Cost and Software Data Reporting System, in all solicitations that include the clause at 252.234-7004, Cost and Software Data Reporting. (2) Use the provision with its Alternate I when...

  8. 49 CFR 234.255 - Gate arm and gate mechanism.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Gate arm and gate mechanism. 234.255 Section 234... Maintenance, Inspection, and Testing Inspections and Tests § 234.255 Gate arm and gate mechanism. (a) Each gate arm and gate mechanism shall be inspected at least once each month. (b) Gate arm movement shall be...

  9. 49 CFR 234.255 - Gate arm and gate mechanism.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Gate arm and gate mechanism. 234.255 Section 234... Maintenance, Inspection, and Testing Inspections and Tests § 234.255 Gate arm and gate mechanism. (a) Each gate arm and gate mechanism shall be inspected at least once each month. (b) Gate arm movement shall be...

  10. 49 CFR 195.234 - Welds: Nondestructive testing.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 3 2010-10-01 2010-10-01 false Welds: Nondestructive testing. 195.234 Section 195... HAZARDOUS LIQUIDS BY PIPELINE Construction § 195.234 Welds: Nondestructive testing. (a) A weld may be... weld. (b) Any nondestructive testing of welds must be performed— (1) In accordance with a written set...

  11. 49 CFR 234.217 - Flashing light units.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Flashing light units. 234.217 Section 234.217... light units. (a) Each flashing light unit shall be properly positioned and aligned and shall be visible to a highway user approaching the crossing. (b) Each flashing light unit shall be maintained to...

  12. 20 CFR 234.13 - Payment to a funeral home.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 1 2013-04-01 2012-04-01 true Payment to a funeral home. 234.13 Section 234...-SUM PAYMENTS Lump-Sum Death Payment § 234.13 Payment to a funeral home. The 1937 Act LSDP is paid to a funeral home under the following conditions: (a) A person who has assumed responsibility for all or part...

  13. 20 CFR 234.13 - Payment to a funeral home.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 1 2012-04-01 2012-04-01 false Payment to a funeral home. 234.13 Section 234...-SUM PAYMENTS Lump-Sum Death Payment § 234.13 Payment to a funeral home. The 1937 Act LSDP is paid to a funeral home under the following conditions: (a) A person who has assumed responsibility for all or part...

  14. 20 CFR 234.13 - Payment to a funeral home.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false Payment to a funeral home. 234.13 Section 234...-SUM PAYMENTS Lump-Sum Death Payment § 234.13 Payment to a funeral home. The 1937 Act LSDP is paid to a funeral home under the following conditions: (a) A person who has assumed responsibility for all or part...

  15. 20 CFR 234.13 - Payment to a funeral home.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Payment to a funeral home. 234.13 Section 234...-SUM PAYMENTS Lump-Sum Death Payment § 234.13 Payment to a funeral home. The 1937 Act LSDP is paid to a funeral home under the following conditions: (a) A person who has assumed responsibility for all or part...

  16. 20 CFR 234.13 - Payment to a funeral home.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 1 2014-04-01 2012-04-01 true Payment to a funeral home. 234.13 Section 234...-SUM PAYMENTS Lump-Sum Death Payment § 234.13 Payment to a funeral home. The 1937 Act LSDP is paid to a funeral home under the following conditions: (a) A person who has assumed responsibility for all or part...

  17. 34 CFR 75.234 - The conditions of the grant.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 34 Education 1 2014-07-01 2014-07-01 false The conditions of the grant. 75.234 Section 75.234... Procedures to Make A Grant § 75.234 The conditions of the grant. (a) The Secretary makes a grant to an applicant only after determining— (1) The approved costs; and (2) Any special conditions. (b) In awarding a...

  18. 49 CFR Appendix A to Part 234 - Schedule of Civil Penalties 1

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ....219Gate arm lights and light cable 1,000 2,000 234.221Lamp voltage 1,000 2,000 234.223Gate arm 1,000 2,000... 234.251Standby power 5,000 7,500 234.253Flashing light units and lamp voltage 1,000 2,000 234.255Gate....265Timing relays and timing devices 1,000 2,000 234.267Insulation resistance tests, wires in trunking and...

  19. 49 CFR 234.207 - Adjustment, repair, or replacement of component.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... warning system fails to perform its intended function, the cause shall be determined and the faulty... completed, a railroad shall take appropriate action under § 234.105, Activation failure, § 234.106, Partial activation, or § 234.107, False activation, of this part. ...

  20. 49 CFR 234.207 - Adjustment, repair, or replacement of component.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... warning system fails to perform its intended function, the cause shall be determined and the faulty... completed, a railroad shall take appropriate action under § 234.105, Activation failure, § 234.106, Partial activation, or § 234.107, False activation, of this part. ...

  1. 37 CFR 2.34 - Bases for filing.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2012-07-01 2012-07-01 false Bases for filing. 2.34... COMMERCE RULES OF PRACTICE IN TRADEMARK CASES The Written Application § 2.34 Bases for filing. (a) The application must include one or more of the following five filing bases: (1) Use in commerce under section 1(a...

  2. 37 CFR 2.34 - Bases for filing.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2013-07-01 2013-07-01 false Bases for filing. 2.34... COMMERCE RULES OF PRACTICE IN TRADEMARK CASES The Written Application § 2.34 Bases for filing. (a) The application must include one or more of the following five filing bases: (1) Use in commerce under section 1(a...

  3. 37 CFR 2.34 - Bases for filing.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2011-07-01 2011-07-01 false Bases for filing. 2.34... COMMERCE RULES OF PRACTICE IN TRADEMARK CASES The Written Application § 2.34 Bases for filing. (a) The application must include one or more of the following five filing bases: (1) Use in commerce under section 1(a...

  4. 37 CFR 2.34 - Bases for filing.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false Bases for filing. 2.34... COMMERCE RULES OF PRACTICE IN TRADEMARK CASES The Written Application § 2.34 Bases for filing. (a) The application must include one or more of the following five filing bases: (1) Use in commerce under section 1(a...

  5. 48 CFR 352.234-4 - Partial earned value management system.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... management system. 352.234-4 Section 352.234-4 Federal Acquisition Regulations System HEALTH AND HUMAN....234-4 Partial earned value management system. As prescribed in 334.203-70(d), the Contracting Officer shall insert the following clause: Partial Earned Value Management System (October 2008) (a) The...

  6. 48 CFR 352.234-4 - Partial earned value management system.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... management system. 352.234-4 Section 352.234-4 Federal Acquisition Regulations System HEALTH AND HUMAN....234-4 Partial earned value management system. As prescribed in 334.203-70(d), the Contracting Officer shall insert the following clause: Partial Earned Value Management System (October 2008) (a) The...

  7. 48 CFR 352.234-4 - Partial earned value management system.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... management system. 352.234-4 Section 352.234-4 Federal Acquisition Regulations System HEALTH AND HUMAN....234-4 Partial earned value management system. As prescribed in 334.203-70(d), the Contracting Officer shall insert the following clause: Partial Earned Value Management System (October 2008) (a) The...

  8. 48 CFR 352.234-4 - Partial earned value management system.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... management system. 352.234-4 Section 352.234-4 Federal Acquisition Regulations System HEALTH AND HUMAN....234-4 Partial earned value management system. As prescribed in 334.203-70(d), the Contracting Officer shall insert the following clause: Partial Earned Value Management System (October 2008) (a) The...

  9. 14 CFR 234.9 - Reporting of on-time performance codes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Reporting of on-time performance codes. 234.9 Section 234.9 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.9 Reporting of...

  10. 14 CFR 234.8 - Calculation of on-time performance codes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Calculation of on-time performance codes. 234.8 Section 234.8 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.8 Calculation...

  11. 48 CFR 352.234-3 - Full earned value management system.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... management system. 352.234-3 Section 352.234-3 Federal Acquisition Regulations System HEALTH AND HUMAN....234-3 Full earned value management system. As prescribed in 334.203-70(c), the Contracting Officer shall insert the following clause: Full Earned Value Management System (October 2008) (a) The Contractor...

  12. 48 CFR 352.234-3 - Full earned value management system.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... management system. 352.234-3 Section 352.234-3 Federal Acquisition Regulations System HEALTH AND HUMAN....234-3 Full earned value management system. As prescribed in 334.203-70(c), the Contracting Officer shall insert the following clause: Full Earned Value Management System (October 2008) (a) The Contractor...

  13. 48 CFR 352.234-3 - Full earned value management system.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... management system. 352.234-3 Section 352.234-3 Federal Acquisition Regulations System HEALTH AND HUMAN....234-3 Full earned value management system. As prescribed in 334.203-70(c), the Contracting Officer shall insert the following clause: Full Earned Value Management System (October 2008) (a) The Contractor...

  14. 48 CFR 352.234-3 - Full earned value management system.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... management system. 352.234-3 Section 352.234-3 Federal Acquisition Regulations System HEALTH AND HUMAN....234-3 Full earned value management system. As prescribed in 334.203-70(c), the Contracting Officer shall insert the following clause: Full Earned Value Management System (October 2008) (a) The Contractor...

  15. 8 CFR 234.4 - International airports for entry of aliens.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 8 Aliens and Nationality 1 2013-01-01 2013-01-01 false International airports for entry of aliens. 234.4 Section 234.4 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.4 International airports for entry...

  16. 8 CFR 234.4 - International airports for entry of aliens.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 8 Aliens and Nationality 1 2010-01-01 2010-01-01 false International airports for entry of aliens. 234.4 Section 234.4 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.4 International airports for entry...

  17. 8 CFR 234.4 - International airports for entry of aliens.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 8 Aliens and Nationality 1 2014-01-01 2014-01-01 false International airports for entry of aliens. 234.4 Section 234.4 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.4 International airports for entry...

  18. 8 CFR 234.4 - International airports for entry of aliens.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 8 Aliens and Nationality 1 2011-01-01 2011-01-01 false International airports for entry of aliens. 234.4 Section 234.4 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.4 International airports for entry...

  19. 8 CFR 234.4 - International airports for entry of aliens.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 8 Aliens and Nationality 1 2012-01-01 2012-01-01 false International airports for entry of aliens. 234.4 Section 234.4 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DESIGNATION OF PORTS OF ENTRY FOR ALIENS ARRIVING BY CIVIL AIRCRAFT § 234.4 International airports for entry...

  20. 24 CFR 248.234 - Section 8 rental assistance.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 2 2011-04-01 2011-04-01 false Section 8 rental assistance. 248.234 Section 248.234 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued) OFFICE OF ASSISTANT SECRETARY FOR HOUSING-FEDERAL HOUSING COMMISSIONER, DEPARTMENT OF...

  1. 24 CFR 248.234 - Section 8 rental assistance.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 2 2012-04-01 2012-04-01 false Section 8 rental assistance. 248.234 Section 248.234 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued) OFFICE OF ASSISTANT SECRETARY FOR HOUSING-FEDERAL HOUSING COMMISSIONER, DEPARTMENT OF...

  2. 24 CFR 248.234 - Section 8 rental assistance.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 2 2013-04-01 2013-04-01 false Section 8 rental assistance. 248.234 Section 248.234 Housing and Urban Development Regulations Relating to Housing and Urban Development (Continued) OFFICE OF ASSISTANT SECRETARY FOR HOUSING-FEDERAL HOUSING COMMISSIONER, DEPARTMENT OF...

  3. 20 CFR 234.12 - 1937 Act lump-sum death payment.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false 1937 Act lump-sum death payment. 234.12 Section 234.12 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD RETIREMENT ACT LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.12 1937 Act lump-sum death payment. (a) The 1937 Act...

  4. 20 CFR 234.12 - 1937 Act lump-sum death payment.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false 1937 Act lump-sum death payment. 234.12 Section 234.12 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD RETIREMENT ACT LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.12 1937 Act lump-sum death payment. (a) The 1937 Act...

  5. 20 CFR 234.12 - 1937 Act lump-sum death payment.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 1 2012-04-01 2012-04-01 false 1937 Act lump-sum death payment. 234.12 Section 234.12 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD RETIREMENT ACT LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.12 1937 Act lump-sum death payment. (a) The 1937 Act...

  6. 20 CFR 234.12 - 1937 Act lump-sum death payment.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 1 2014-04-01 2012-04-01 true 1937 Act lump-sum death payment. 234.12 Section 234.12 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD RETIREMENT ACT LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.12 1937 Act lump-sum death payment. (a) The 1937 Act...

  7. 20 CFR 234.12 - 1937 Act lump-sum death payment.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 1 2013-04-01 2012-04-01 true 1937 Act lump-sum death payment. 234.12 Section 234.12 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE RAILROAD RETIREMENT ACT LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.12 1937 Act lump-sum death payment. (a) The 1937 Act...

  8. 20 CFR 234.11 - 1974 Act lump-sum death payment.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false 1974 Act lump-sum death payment. 234.11... LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.11 1974 Act lump-sum death payment. (a) The total amount... household” as the employee at the time of the employee's death. (Refer to § 234.21 for an explanation of...

  9. 20 CFR 234.11 - 1974 Act lump-sum death payment.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 20 Employees' Benefits 1 2014-04-01 2012-04-01 true 1974 Act lump-sum death payment. 234.11... LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.11 1974 Act lump-sum death payment. (a) The total amount... household” as the employee at the time of the employee's death. (Refer to § 234.21 for an explanation of...

  10. 20 CFR 234.11 - 1974 Act lump-sum death payment.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 1 2011-04-01 2011-04-01 false 1974 Act lump-sum death payment. 234.11... LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.11 1974 Act lump-sum death payment. (a) The total amount... household” as the employee at the time of the employee's death. (Refer to § 234.21 for an explanation of...

  11. 20 CFR 234.11 - 1974 Act lump-sum death payment.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 1 2012-04-01 2012-04-01 false 1974 Act lump-sum death payment. 234.11... LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.11 1974 Act lump-sum death payment. (a) The total amount... household” as the employee at the time of the employee's death. (Refer to § 234.21 for an explanation of...

  12. 20 CFR 234.11 - 1974 Act lump-sum death payment.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 20 Employees' Benefits 1 2013-04-01 2012-04-01 true 1974 Act lump-sum death payment. 234.11... LUMP-SUM PAYMENTS Lump-Sum Death Payment § 234.11 1974 Act lump-sum death payment. (a) The total amount... household” as the employee at the time of the employee's death. (Refer to § 234.21 for an explanation of...

  13. On the Nature of the Cherdyntsev-Chalov Effect

    NASA Astrophysics Data System (ADS)

    Timashev, S. F.

    2018-06-01

    It is shown that the Cherdyntsev-Chalov effect, usually presented as the separation of even isotopes of uranium upon their transition from the solid to the liquid phase, can include initiated acceleration of the radioactive decay of uranium-238 nuclei during the formation of cracks in geologically (seismic and volcanically) active zones of the Earth's crust. The fissuring of the solid-phase medium leads to an increase in mechanical tensile stress and the emergence of strong local electric fields, resulting in the injection of chemical-scale high-energy electrons into the aqueous phase of the cracks. Under these conditions, the e - catalytic decay of uranium-238 nucleus studied earlier can occur during the formation of metastable protactinium-238 nuclei with locally distorted nucleon structure, which subequently undergo β-decay with the formation of thorium-234 and helium-4 nuclei as products of the fission of the initial uranium-238 nucleus with a characteristic period of several years. The observed increased activity of uranium-234 nuclei that form during the subsequent β-decay of thorium and then protactinium is associated with the initiated fission of uranium-238. The possibility is discussed of developing thermal power by using existing wastes from uranium production that contain uranium-238 to activate this isotope through the mechanochemical processing of these wastes in aqueous media with the formation of 91 238 Pa isu , the half-life of which is several years.

  14. 12 CFR 23.4 - Investment in personal property.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Investment in personal property. 23.4 Section... Provisions § 23.4 Investment in personal property. (a) General rule. A national bank may acquire specific... business or for entry into the leasing business; and (2) The bank's aggregate investment in property held...

  15. 12 CFR 23.4 - Investment in personal property.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 1 2011-01-01 2011-01-01 false Investment in personal property. 23.4 Section... Provisions § 23.4 Investment in personal property. (a) General rule. A national bank may acquire specific... business or for entry into the leasing business; and (2) The bank's aggregate investment in property held...

  16. 49 CFR 234.309 - ENS signs in general.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.309 ENS signs in general. (a) Provision of... dispatching railroad for a highway-rail or pathway grade crossing shall provide to the maintaining railroad.... Each ENS sign located at each highway-rail or pathway grade crossing as required by § 234.311 shall...

  17. 49 CFR 234.309 - ENS signs in general.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.309 ENS signs in general. (a) Provision of... dispatching railroad for a highway-rail or pathway grade crossing shall provide to the maintaining railroad.... Each ENS sign located at each highway-rail or pathway grade crossing as required by § 234.311 shall...

  18. 49 CFR 234.309 - ENS signs in general.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.309 ENS signs in general. (a) Provision of... dispatching railroad for a highway-rail or pathway grade crossing shall provide to the maintaining railroad.... Each ENS sign located at each highway-rail or pathway grade crossing as required by § 234.311 shall...

  19. Seawater 234U/238U recorded by modern and fossil corals

    NASA Astrophysics Data System (ADS)

    Chutcharavan, Peter M.; Dutton, Andrea; Ellwood, Michael J.

    2018-03-01

    U-series dating of corals is a crucial tool for generating absolute chronologies of Late Quaternary sea-level change and calibrating the radiocarbon timescale. Unfortunately, coralline aragonite is susceptible to post-depositional alteration of its primary geochemistry. One screening technique used to identify unaltered corals relies on the back-calculation of initial 234U/238U activity (δ234Ui) at the time of coral growth and implicitly assumes that seawater δ234U has remained constant during the Late Quaternary. Here, we test this assumption using the most comprehensive compilation to date of coral U-series measurements. Unlike previous compilations, this study normalizes U-series measurements to the same decay constants and corrects for offsets in interlaboratory calibrations, thus reducing systematic biases between reported δ234U values. Using this approach, we reassess (a) the value of modern seawater δ234U, and (b) the evolution of seawater δ234U over the last deglaciation. Modern coral δ234U values (145.0 ± 1.5‰) agree with previous measurements of seawater and modern corals only once the data have been normalized. Additionally, fossil corals in the surface ocean display δ234Ui values that are ∼5-7‰ lower during the last glacial maximum regardless of site, taxon, or diagenetic setting. We conclude that physical weathering of U-bearing minerals exposed during ice sheet retreat drives the increase in δ234U observed in the oceans, a mechanism that is consistent with the interpretation of the seawater Pb-isotope signal over the same timescale.

  20. 49 CFR 234.225 - Activation of warning system.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Activation of warning system. 234.225 Section 234....225 Activation of warning system. A highway-rail grade crossing warning system shall be maintained to activate in accordance with the design of the warning system, but in no event shall it provide less than 20...

  1. 49 CFR 234.225 - Activation of warning system.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Activation of warning system. 234.225 Section 234....225 Activation of warning system. A highway-rail grade crossing warning system shall be maintained to activate in accordance with the design of the warning system, but in no event shall it provide less than 20...

  2. 49 CFR 234.225 - Activation of warning system.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Activation of warning system. 234.225 Section 234....225 Activation of warning system. A highway-rail grade crossing warning system shall be maintained to activate in accordance with the design of the warning system, but in no event shall it provide less than 20...

  3. 14 CFR 234.10 - Voluntary disclosure of on-time performance codes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Voluntary disclosure of on-time performance codes. 234.10 Section 234.10 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.10 Voluntary...

  4. 48 CFR 252.234-7001 - Notice of Earned Value Management System.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Industries Alliance Standard 748, Earned Value Management Systems (ANSI/EIA-748) (current version at time of... Management System. 252.234-7001 Section 252.234-7001 Federal Acquisition Regulations System DEFENSE... CLAUSES Text of Provisions And Clauses 252.234-7001 Notice of Earned Value Management System. As...

  5. 49 CFR 234.245 - Signs.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Maintenance Standards § 234.245 Signs. Each sign mounted on a highway-rail grade crossing signal post shall be maintained in good condition and be visible to the highway user. Inspections and Tests ...

  6. 7 CFR 58.234 - Buttermilk.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Specifications for Dairy Plants Approved for USDA Inspection and Grading Service 1 Quality Specifications for Raw Materials § 58.234 Buttermilk. Buttermilk for drying as dry buttermilk or dry buttermilk product shall be...

  7. 7 CFR 58.234 - Buttermilk.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Specifications for Dairy Plants Approved for USDA Inspection and Grading Service 1 Quality Specifications for Raw Materials § 58.234 Buttermilk. Buttermilk for drying as dry buttermilk or dry buttermilk product shall be...

  8. 49 CFR 234.211 - Security of warning system apparatus.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Security of warning system apparatus. 234.211 Section 234.211 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD....211 Security of warning system apparatus. Highway-rail grade crossing warning system apparatus shall...

  9. 49 CFR 234.211 - Security of warning system apparatus.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Security of warning system apparatus. 234.211 Section 234.211 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD....211 Security of warning system apparatus. Highway-rail grade crossing warning system apparatus shall...

  10. 49 CFR 234.211 - Security of warning system apparatus.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Security of warning system apparatus. 234.211 Section 234.211 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD....211 Security of warning system apparatus. Highway-rail grade crossing warning system apparatus shall...

  11. 48 CFR 1852.234-1 - Notice of Earned Value Management System.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Notice of Earned Value Management System. 1852.234-1 Section 1852.234-1 Federal Acquisition Regulations System NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Texts of Provisions and Clauses 1852.234-1 Notice of...

  12. 42 CFR 23.4 - How must an entity apply for assignment?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 42 Public Health 1 2011-10-01 2011-10-01 false How must an entity apply for assignment? 23.4 Section 23.4 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES PERSONNEL NATIONAL HEALTH SERVICE CORPS Assignment of National Health Service Corps Personnel § 23.4 How must an...

  13. Influence of glacial meltwater on global seawater δ234U

    NASA Astrophysics Data System (ADS)

    Arendt, Carli A.; Aciego, Sarah M.; Sims, Kenneth W. W.; Das, Sarah B.; Sheik, Cody; Stevenson, Emily I.

    2018-03-01

    We present the first published uranium-series measurements from modern Greenland Ice Sheet (GrIS) runoff and proximal seawater, and investigate the influence of glacial melt on global seawater δ234U over glacial-interglacial (g-ig) timescales. Climate reconstructions based on closed-system uranium-thorium (U/Th) dating of fossil corals assume U chemistry of seawater has remained stable over time despite notable fluctuations in major elemental compositions, concentrations, and isotopic compositions of global seawater on g-ig timescales. Deglacial processes increase weathering, significantly increasing U-series concentrations and changing the δ234U of glacial meltwater. Analyses of glacial discharge from GrIS outlet glaciers indicate that meltwater runoff has elevated U concentrations and differing 222Rn concentrations and δ234U compositions, likely due to variations in subglacial residence time. Locations with high δ234U have the potential to increase proximal seawater δ234U. To better understand the impact of bulk glacial melt on global seawater δ234U over time, we use a simple box model to scale these processes to periods of extreme deglaciation. We account for U fluxes from the GrIS, Antarctica, and large Northern Hemisphere Continental Ice Sheets, and assess sensitivity by varying melt volumes, duration and U flux input rates based on modern subglacial water U concentrations and compositions. All scenarios support the hypothesis that global seawater δ234U has varied by more than 1‰ through time as a function of predictable perturbations in continental U fluxes during g-ig periods.

  14. 42 CFR 456.234 - Subsequent continued stay review dates.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 4 2010-10-01 2010-10-01 false Subsequent continued stay review dates. 456.234 Section 456.234 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL ASSISTANCE PROGRAMS UTILIZATION CONTROL Utilization Control: Mental Hospitals...

  15. 49 CFR 234.211 - Security of warning system apparatus.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Security of warning system apparatus. 234.211... Maintenance, Inspection, and Testing Maintenance Standards § 234.211 Security of warning system apparatus. Highway-rail grade crossing warning system apparatus shall be secured against unauthorized entry. ...

  16. 49 CFR 234.211 - Security of warning system apparatus.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Security of warning system apparatus. 234.211... Maintenance, Inspection, and Testing Maintenance Standards § 234.211 Security of warning system apparatus. Highway-rail grade crossing warning system apparatus shall be secured against unauthorized entry. ...

  17. 49 CFR 234.261 - Highway traffic signal pre-emption.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Maintenance, Inspection, and Testing Inspections and Tests § 234.261 Highway traffic signal pre-emption. Highway traffic signal pre-emption interconnections, for which a railroad has maintenance responsibility... 49 Transportation 4 2010-10-01 2010-10-01 false Highway traffic signal pre-emption. 234.261...

  18. 49 CFR 234.261 - Highway traffic signal pre-emption.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Highway traffic signal pre-emption. 234.261..., AND EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.261 Highway traffic signal pre-emption. Highway traffic signal pre-emption interconnections, for which...

  19. 49 CFR 234.261 - Highway traffic signal pre-emption.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Highway traffic signal pre-emption. 234.261..., AND EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.261 Highway traffic signal pre-emption. Highway traffic signal pre-emption interconnections, for which...

  20. 49 CFR 234.261 - Highway traffic signal pre-emption.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Maintenance, Inspection, and Testing Inspections and Tests § 234.261 Highway traffic signal pre-emption. Highway traffic signal pre-emption interconnections, for which a railroad has maintenance responsibility... 49 Transportation 4 2011-10-01 2011-10-01 false Highway traffic signal pre-emption. 234.261...

  1. 49 CFR 234.261 - Highway traffic signal pre-emption.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Highway traffic signal pre-emption. 234.261..., AND EMERGENCY NOTIFICATION SYSTEMS Maintenance, Inspection, and Testing Inspections and Tests § 234.261 Highway traffic signal pre-emption. Highway traffic signal pre-emption interconnections, for which...

  2. Uranium-234 anomalies in corals older than 150,000 years

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Bard, E.; Fairbanks, R.G.; Zindler, A.

    1991-08-01

    The authors present new precise U-Th ages of well-preserved coral specimens collected from the island of Barbados, West Indies, and the atoll of Mururoa, French Polynesia. Their new data confirm the ages attributed to oxygen isotope stage 7 in the framework of the Milankovitch theory. By using thermal ionization mass spectrometry (TIMS), it is also possible to quantify precisely the [sup 234]U/[sup 238]U ratios in corals. Samples older than 150 kyr B.P. are shown to be characterized by significant excesses of [sup 234]U relative to the uranium isotopic composition expected if the corals grew in present-day sea water. Assuming thatmore » the [sup 230]Th-ingrowth ages are accurate, these anomalies translate into high initial [sup 234]U/[sup 238]U ratios: about 1.2 at 200 kyr and up to 1.5 at about 450 kyr B.P. They propose that the anomalies result from both diagenetic addition and replacement of U and possibly from global changes in the [sup 234]U/[sup 238]U composition of the sea water through time. The [sup 234]U anomalies cast doubt on the accuracy of the classical [sup 230]Th-ingrowth dating method in old corals, and in particular for the use of measured [sup 234]U/[sup 238]U ratios alone to date corals older than 150 kyr.« less

  3. 7 CFR 23.4 - State Rural Development Advisory Council.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Development Advisory Council will insure that programs proposed under title V including regional programs... 7 Agriculture 1 2010-01-01 2010-01-01 false State Rural Development Advisory Council. 23.4 Section 23.4 Agriculture Office of the Secretary of Agriculture STATE AND REGIONAL ANNUAL PLANS OF WORK State...

  4. 48 CFR 252.234-7002 - Earned Value Management System.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 48 Federal Acquisition Regulations System 3 2012-10-01 2012-10-01 false Earned Value Management... of Provisions And Clauses 252.234-7002 Earned Value Management System. As prescribed in 234.203(2), use the following clause: Earned Value Management System (MAY 2011) (a) Definitions. As used in this...

  5. 48 CFR 252.234-7002 - Earned Value Management System.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 48 Federal Acquisition Regulations System 3 2013-10-01 2013-10-01 false Earned Value Management... of Provisions And Clauses 252.234-7002 Earned Value Management System. As prescribed in 234.203(2), use the following clause: Earned Value Management System (MAY 2011) (a) Definitions. As used in this...

  6. 48 CFR 252.234-7002 - Earned Value Management System.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 48 Federal Acquisition Regulations System 3 2014-10-01 2014-10-01 false Earned Value Management... of Provisions And Clauses 252.234-7002 Earned Value Management System. As prescribed in 234.203(2), use the following clause: Earned Value Management System (MAY 2011) (a) Definitions. As used in this...

  7. 48 CFR 252.234-7002 - Earned Value Management System.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 3 2011-10-01 2011-10-01 false Earned Value Management... of Provisions And Clauses 252.234-7002 Earned Value Management System. As prescribed in 234.203(2), use the following clause: EARNED VALUE MANAGEMENT SYSTEM (MAY 2011) (a) Definitions. As used in this...

  8. 48 CFR 252.234-7002 - Earned Value Management System.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 3 2010-10-01 2010-10-01 false Earned Value Management... of Provisions And Clauses 252.234-7002 Earned Value Management System. As prescribed in 234.203(2), use the following clause: Earned Value Management System (APR 2008) (a) In the performance of this...

  9. 46 CFR 169.234 - Integral fuel oil tank examinations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Integral fuel oil tank examinations. 169.234 Section 169... VESSELS Inspection and Certification Drydocking Or Hauling Out § 169.234 Integral fuel oil tank examinations. (a) Each fuel oil tank with at least one side integral to the vessel's hull and located within...

  10. 46 CFR 169.234 - Integral fuel oil tank examinations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Integral fuel oil tank examinations. 169.234 Section 169... VESSELS Inspection and Certification Drydocking Or Hauling Out § 169.234 Integral fuel oil tank examinations. (a) Each fuel oil tank with at least one side integral to the vessel's hull and located within...

  11. 46 CFR 169.234 - Integral fuel oil tank examinations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Integral fuel oil tank examinations. 169.234 Section 169... VESSELS Inspection and Certification Drydocking Or Hauling Out § 169.234 Integral fuel oil tank examinations. (a) Each fuel oil tank with at least one side integral to the vessel's hull and located within...

  12. 46 CFR 169.234 - Integral fuel oil tank examinations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Integral fuel oil tank examinations. 169.234 Section 169... VESSELS Inspection and Certification Drydocking Or Hauling Out § 169.234 Integral fuel oil tank examinations. (a) Each fuel oil tank with at least one side integral to the vessel's hull and located within...

  13. 49 CFR 234.237 - Reverse switch cut-out circuit.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Reverse switch cut-out circuit. 234.237 Section... Maintenance, Inspection, and Testing Maintenance Standards § 234.237 Reverse switch cut-out circuit. A switch... system circuitry, shall be maintained so that the warning system can only be cut out when the switch...

  14. 16 CFR 23.4 - Misrepresentation as to gold content.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 1 2014-01-01 2014-01-01 false Misrepresentation as to gold content. 23.4... JEWELRY, PRECIOUS METALS, AND PEWTER INDUSTRIES § 23.4 Misrepresentation as to gold content. (a) It is unfair or deceptive to misrepresent the presence of gold or gold alloy in an industry product, or the...

  15. 16 CFR 23.4 - Misrepresentation as to gold content.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 16 Commercial Practices 1 2011-01-01 2011-01-01 false Misrepresentation as to gold content. 23.4... JEWELRY, PRECIOUS METALS, AND PEWTER INDUSTRIES § 23.4 Misrepresentation as to gold content. (a) It is unfair or deceptive to misrepresent the presence of gold or gold alloy in an industry product, or the...

  16. 49 CFR 234.273 - Results of inspections and tests.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Results of inspections and tests. 234.273 Section... Maintenance, Inspection, and Testing Inspections and Tests § 234.273 Results of inspections and tests. (a) Results of inspections and tests made in compliance with this part shall be recorded on forms provided by...

  17. 49 CFR 234.273 - Results of inspections and tests.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Results of inspections and tests. 234.273 Section... Maintenance, Inspection, and Testing Inspections and Tests § 234.273 Results of inspections and tests. (a) Results of inspections and tests made in compliance with this part shall be recorded on forms provided by...

  18. 49 CFR 234.311 - ENS sign placement and maintenance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Conditions at Highway-Rail and Pathway Grade Crossings § 234.311 ENS sign placement and maintenance. (a) Number of signs at highway-rail or pathway grade crossing. (1) In general. The maintaining railroad, or the railroad appointed pursuant to § 234.306(b), for a highway-rail or pathway grade crossing shall...

  19. 49 CFR 234.311 - ENS sign placement and maintenance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Conditions at Highway-Rail and Pathway Grade Crossings § 234.311 ENS sign placement and maintenance. (a) Number of signs at highway-rail or pathway grade crossing. (1) In general. The maintaining railroad, or the railroad appointed pursuant to § 234.306(b), for a highway-rail or pathway grade crossing shall...

  20. 49 CFR 234.311 - ENS sign placement and maintenance.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Conditions at Highway-Rail and Pathway Grade Crossings § 234.311 ENS sign placement and maintenance. (a) Number of signs at highway-rail or pathway grade crossing. (1) In general. The maintaining railroad, or the railroad appointed pursuant to § 234.306(b), for a highway-rail or pathway grade crossing shall...

  1. 49 CFR 234.237 - Reverse switch cut-out circuit.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Reverse switch cut-out circuit. 234.237 Section... Maintenance, Inspection, and Testing Maintenance Standards § 234.237 Reverse switch cut-out circuit. A switch... system circuitry, shall be maintained so that the warning system can only be cut out when the switch...

  2. 48 CFR 1052.234-72 - Core Earned Value Management System AUG 2011

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Management System AUG 2011 1052.234-72 Section 1052.234-72 Federal Acquisition Regulations System DEPARTMENT... and Clauses 1052.234-72 Core Earned Value Management System AUG 2011 As prescribed in DTAR 1034.203... an earned value management system (EVMS). (a) The Contractor shall use an earned value management...

  3. 48 CFR 1052.234-72 - Core Earned Value Management System AUG 2011

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Management System AUG 2011 1052.234-72 Section 1052.234-72 Federal Acquisition Regulations System DEPARTMENT... and Clauses 1052.234-72 Core Earned Value Management System AUG 2011 As prescribed in DTAR 1034.203... an earned value management system (EVMS). (a) The Contractor shall use an earned value management...

  4. 48 CFR 1052.234-72 - Core Earned Value Management System AUG 2011

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Management System AUG 2011 1052.234-72 Section 1052.234-72 Federal Acquisition Regulations System DEPARTMENT... and Clauses 1052.234-72 Core Earned Value Management System AUG 2011 As prescribed in DTAR 1034.203... an earned value management system (EVMS). (a) The Contractor shall use an earned value management...

  5. 14 CFR 234.1 - Purpose.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.1 Purpose. The purpose of this part is to set...' quality of service can be made available to consumers of air transportation. This part also requires that service quality data be disclosed directly to consumers. ...

  6. 20 CFR 234.32 - Spouse or divorced spouse annuities.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Spouse or divorced spouse annuities. 234.32... LUMP-SUM PAYMENTS Annuities Due but Unpaid at Death § 234.32 Spouse or divorced spouse annuities. A spouse annuity or divorced spouse annuity which is unpaid at the death of the spouse or divorced spouse...

  7. 45 CFR 234.70 - Protective payments for the aged, blind, or disabled.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... disabled. 234.70 Section 234.70 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY... SERVICES FINANCIAL ASSISTANCE TO INDIVIDUALS § 234.70 Protective payments for the aged, blind, or disabled... protective services for families or for the disabled or aged group of which the recipient is a member; and...

  8. 45 CFR 234.70 - Protective payments for the aged, blind, or disabled.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... disabled. 234.70 Section 234.70 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY... SERVICES FINANCIAL ASSISTANCE TO INDIVIDUALS § 234.70 Protective payments for the aged, blind, or disabled... protective services for families or for the disabled or aged group of which the recipient is a member; and...

  9. 45 CFR 234.70 - Protective payments for the aged, blind, or disabled.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... disabled. 234.70 Section 234.70 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY... SERVICES FINANCIAL ASSISTANCE TO INDIVIDUALS § 234.70 Protective payments for the aged, blind, or disabled... protective services for families or for the disabled or aged group of which the recipient is a member; and...

  10. 45 CFR 234.70 - Protective payments for the aged, blind, or disabled.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... disabled. 234.70 Section 234.70 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY... SERVICES FINANCIAL ASSISTANCE TO INDIVIDUALS § 234.70 Protective payments for the aged, blind, or disabled... protective services for families or for the disabled or aged group of which the recipient is a member; and...

  11. 49 CFR 234.205 - Operating characteristics of warning system apparatus.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... apparatus. 234.205 Section 234.205 Transportation Other Regulations Relating to Transportation (Continued... characteristics of warning system apparatus. Operating characteristics of electromagnetic, electronic, or electrical apparatus of each highway-rail crossing warning system shall be maintained in accordance with the...

  12. 49 CFR 234.205 - Operating characteristics of warning system apparatus.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... apparatus. 234.205 Section 234.205 Transportation Other Regulations Relating to Transportation (Continued... characteristics of warning system apparatus. Operating characteristics of electromagnetic, electronic, or electrical apparatus of each highway-rail crossing warning system shall be maintained in accordance with the...

  13. 49 CFR 234.255 - Gate arm and gate mechanism.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Gate arm and gate mechanism. 234.255 Section 234....255 Gate arm and gate mechanism. (a) Each gate arm and gate mechanism shall be inspected at least once each month. (b) Gate arm movement shall be observed for proper operation at least once each month. (c...

  14. 49 CFR 234.255 - Gate arm and gate mechanism.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Gate arm and gate mechanism. 234.255 Section 234....255 Gate arm and gate mechanism. (a) Each gate arm and gate mechanism shall be inspected at least once each month. (b) Gate arm movement shall be observed for proper operation at least once each month. (c...

  15. 49 CFR 234.255 - Gate arm and gate mechanism.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Gate arm and gate mechanism. 234.255 Section 234....255 Gate arm and gate mechanism. (a) Each gate arm and gate mechanism shall be inspected at least once each month. (b) Gate arm movement shall be observed for proper operation at least once each month. (c...

  16. 27 CFR 19.234 - Deposit of securities in lieu of corporate surety.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Consents of Surety § 19.234 Deposit of securities in lieu of corporate surety. In lieu of corporate surety... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Deposit of securities in lieu of corporate surety. 19.234 Section 19.234 Alcohol, Tobacco Products and Firearms ALCOHOL AND...

  17. 48 CFR 234.7100 - Policy.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Cost and Software Data Reporting 234.7100 Policy. (a) The cost and software data reporting (CSDR) requirement is mandatory for major defense... data reporting and software resources data reporting. (b) Prior to contract award, contracting officers...

  18. 48 CFR 234.7100 - Policy.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Cost and Software Data Reporting 234.7100 Policy. (a) The cost and software data reporting (CSDR) requirement is mandatory for major defense... data reporting and software resources data reporting. (b) Prior to contract award, contracting officers...

  19. 48 CFR 234.7100 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Cost and Software Data Reporting 234.7100 Policy. (a) The cost and software data reporting (CSDR) requirement is mandatory for major defense... data reporting and software resources data reporting. (b) Prior to contract award, contracting officers...

  20. 48 CFR 234.7100 - Policy.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Cost and Software Data Reporting 234.7100 Policy. (a) The cost and software data reporting (CSDR) requirement is mandatory for major defense... data reporting and software resources data reporting. (b) Prior to contract award, contracting officers...

  1. 49 CFR 234.103 - Timely response to report of malfunction.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Timely response to report of malfunction. 234.103 Section 234.103 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS...

  2. 49 CFR 234.103 - Timely response to report of malfunction.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Timely response to report of malfunction. 234.103 Section 234.103 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS...

  3. 49 CFR 234.103 - Timely response to report of malfunction.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Timely response to report of malfunction. 234.103 Section 234.103 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS...

  4. Extreme fractionation of 234U 238U and 230Th 234U in spring waters, sediments, and fossils at the Pomme de Terre Valley, southwestern Missouri

    USGS Publications Warehouse

    Szabo, B. J.

    1982-01-01

    Isotopic fractionation as great as 1600% exists between 234U and 238U in spring waters, sediments, and fossils in the Pomme de Terre Valley, southwestern Missouri. The activity ratios of 234U 238U in five springs range from 7.2 to 16 in water which has been discharged for at least the past 30,000 years. The anomalies in 234U 238U ratio in deep water have potential usefulness in hydrologic investigations in southern Missouri. Clayey units overlying the spring bog sediments of Trolinger Spring are enriched in 230Th relative to their parent 234U by as much as 720%. The results indicate that both preferential displacement via alpha recoil ejection and the preferential emplacement via recoiling and physical entrapment are significant processes that are occurring in the geologic environment. ?? 1982.

  5. 49 CFR 234.103 - Timely response to report of malfunction.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Timely response to report of malfunction. 234.103 Section 234.103 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response...

  6. 49 CFR 234.103 - Timely response to report of malfunction.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Timely response to report of malfunction. 234.103 Section 234.103 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS Response...

  7. 45 CFR 153.234 - Eligibility under health insurance market rules.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 1 2013-10-01 2013-10-01 false Eligibility under health insurance market rules. 153.234 Section 153.234 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES REQUIREMENTS RELATING TO HEALTH CARE ACCESS STANDARDS RELATED TO REINSURANCE, RISK CORRIDORS, AND RISK ADJUSTMENT UNDER THE...

  8. 45 CFR 153.234 - Eligibility under health insurance market rules.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 1 2014-10-01 2014-10-01 false Eligibility under health insurance market rules. 153.234 Section 153.234 Public Welfare Department of Health and Human Services REQUIREMENTS RELATING TO HEALTH CARE ACCESS STANDARDS RELATED TO REINSURANCE, RISK CORRIDORS, AND RISK ADJUSTMENT UNDER THE...

  9. 49 CFR 234.313 - Recordkeeping.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.313 Recordkeeping. (a) In general. Each railroad... subpart: (1) The nature of the reported unsafe condition; (2) The location of the highway-rail or pathway... railroads. (1) Where multiple railroads dispatch trains through the same highway-rail or pathway grade...

  10. 49 CFR 234.313 - Recordkeeping.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.313 Recordkeeping. (a) In general. Each railroad... subpart: (1) The nature of the reported unsafe condition; (2) The location of the highway-rail or pathway... railroads. (1) Where multiple railroads dispatch trains through the same highway-rail or pathway grade...

  11. 49 CFR 234.313 - Recordkeeping.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... at Highway-Rail and Pathway Grade Crossings § 234.313 Recordkeeping. (a) In general. Each railroad... subpart: (1) The nature of the reported unsafe condition; (2) The location of the highway-rail or pathway... railroads. (1) Where multiple railroads dispatch trains through the same highway-rail or pathway grade...

  12. 48 CFR 234.201 - Policy.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Earned Value Management System 234.201 Policy. (1) DoD applies the earned value management system requirement as follows: (i) For cost or incentive contracts and subcontracts valued at $20,000,000 or more, the earned value management system shall...

  13. 48 CFR 234.201 - Policy.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Earned Value Management System 234.201 Policy. (1) DoD applies the earned value management system requirement as follows: (i) For cost or incentive contracts and subcontracts valued at $20,000,000 or more, the earned value management system shall...

  14. 48 CFR 234.201 - Policy.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Earned Value Management System 234.201 Policy. (1) DoD applies the earned value management system requirement as follows: (i) For cost or incentive contracts and subcontracts valued at $20,000,000 or more, the earned value management system shall...

  15. 48 CFR 234.201 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... DEFENSE SPECIAL CATEGORIES OF CONTRACTING MAJOR SYSTEM ACQUISITION Earned Value Management System 234.201 Policy. (1) DoD applies the earned value management system requirement as follows: (i) For cost or incentive contracts and subcontracts valued at $20,000,000 or more, the earned value management system shall...

  16. 49 CFR 234.253 - Flashing light units and lamp voltage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Flashing light units and lamp voltage. 234.253... Maintenance, Inspection, and Testing Inspections and Tests § 234.253 Flashing light units and lamp voltage. (a... proper alignment and frequency of flashes in accordance with installation specifications. (b) Lamp...

  17. 49 CFR 234.253 - Flashing light units and lamp voltage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Flashing light units and lamp voltage. 234.253... Maintenance, Inspection, and Testing Inspections and Tests § 234.253 Flashing light units and lamp voltage. (a... proper alignment and frequency of flashes in accordance with installation specifications. (b) Lamp...

  18. 50 CFR 218.234 - Mitigation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Frequency Active (SURTASS LFA) Sonar § 218.234 Mitigation. When conducting operations identified in § 218... monitoring. (b) General Operating Procedures: (1) Prior to SURTASS LFA sonar operations, the Navy will... SURTASS LFA sonar signal at a frequency greater than 500 Hertz (Hz). (c) LFA Sonar Mitigation Zone and 1...

  19. 50 CFR 218.234 - Mitigation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Frequency Active (SURTASS LFA) Sonar § 218.234 Mitigation. When conducting operations identified in § 218... monitoring. (b) General Operating Procedures: (1) Prior to SURTASS LFA sonar operations, the Navy will... SURTASS LFA sonar signal at a frequency greater than 500 Hertz (Hz). (c) LFA Sonar Mitigation Zone and 1...

  20. 50 CFR 218.234 - Mitigation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Frequency Active (SURTASS LFA) Sonar § 218.234 Mitigation. When conducting operations identified in § 218... monitoring. (b) General Operating Procedures: (1) Prior to SURTASS LFA sonar operations, the Navy will... SURTASS LFA sonar signal at a frequency greater than 500 Hertz (Hz). (c) LFA Sonar Mitigation Zone and 1...

  1. 14 CFR 234.1 - Purpose.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.1 Purpose. The purpose of this part is to set... system vendors in computerized form, except as otherwise provided, so that information on air carriers' quality of service can be made available to consumers of air transportation. This part also requires that...

  2. 14 CFR 234.1 - Purpose.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.1 Purpose. The purpose of this part is to set... system vendors in computerized form, except as otherwise provided, so that information on air carriers' quality of service can be made available to consumers of air transportation. This part also requires that...

  3. 14 CFR 234.1 - Purpose.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.1 Purpose. The purpose of this part is to set... system vendors in computerized form, except as otherwise provided, so that information on air carriers' quality of service can be made available to consumers of air transportation. This part also requires that...

  4. 14 CFR 234.1 - Purpose.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.1 Purpose. The purpose of this part is to set... system vendors in computerized form, except as otherwise provided, so that information on air carriers' quality of service can be made available to consumers of air transportation. This part also requires that...

  5. 49 CFR 234.219 - Gate arm lights and light cable.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Gate arm lights and light cable. 234.219 Section... Maintenance, Inspection, and Testing Maintenance Standards § 234.219 Gate arm lights and light cable. Each gate arm light shall be maintained in such condition to be properly visible to approaching highway...

  6. 49 CFR 234.219 - Gate arm lights and light cable.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Gate arm lights and light cable. 234.219 Section... Maintenance, Inspection, and Testing Maintenance Standards § 234.219 Gate arm lights and light cable. Each gate arm light shall be maintained in such condition to be properly visible to approaching highway...

  7. 24 CFR 234.1 - Cross-reference.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... new construction. 203.14Builders' warranty. 203.18aSolar energy system. 203.18cOne-time or up-front.... 1709) apply to mortgages on individually owned units insured under section 234 of the National Housing...

  8. 24 CFR 234.1 - Cross-reference.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... new construction. 203.14Builders' warranty. 203.18aSolar energy system. 203.18cOne-time or up-front.... 1709) apply to mortgages on individually owned units insured under section 234 of the National Housing...

  9. 49 CFR 234.213 - Grounds.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... current power distribution circuits that are grounded in the interest of safety; and common return wires... Maintenance Standards § 234.213 Grounds. Each circuit that affects the proper functioning of a highway-rail... permit a current flow of 75 percent or more of the release value of any relay or electromagnetic device...

  10. The Effect of U-234 Content on the Neutronic Behavior of Uranium Systems

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Busch, Robert D.; Bledsoe, Keith C

    2011-01-01

    When analyzing uranium systems, the usual rule of thumb is to ignore the U-234 by assuming that it behaves neutronically like U-238. Thus for uranium systems, the uranium is evaluated as U-235 with everything else being U-238. The absorption cross section of U-234 is indeed qualitatively very similar to that of U-238. However, thermal absorption cross section of U-234 is about 100 times that of U-238. At low U-235 enrichments, the amount of U-234 is quite small so the impact of assuming it is U-238 is minimal. However, at high enrichments, the relative ratio of U-234 to U-238 is quitemore » large (maybe as much as 1 to 5). Thus, one would expect that some effect of using the rule of thumb might be seen in higher enriched systems. Analyses were performed on three uranium systems from the set of Benchmarks [1]. Although the benchmarks are adequately characterized as to the U-234 content, often, materials used in processing are not as well characterized. This issue may become more important with the advent of laser enrichment processes, which have little or no effect on the U-234 content. Analytical results based on the relationship of U-234 activity to that of U-235 have shown good predictive capability but with large variability in the uncertainties [2]. Rucker and Johnson noted that the actual isotopics vary with enrichment, design of the enrichment cascade, composition of the feed material, and on blending of enrichments so there is considerable uncertainty in the use of models to determine isotopics. Thus, it is important for criticality personnel to understand the effects of variation of U-234 content in fissile systems and the impact of different modeling assumptions in handling the U-234. Analyses were done on LEU, IEU and HEU benchmarks from the International Handbook. These indicate that the effect of ignoring U-234 in HEU metal systems is non-conservative while it seems to be conservative for HEU solution systems. The magnitude of change in k

  11. The proof-of-concept of ASS234: Peripherally administered ASS234 enters the central nervous system and reduces pathology in a male mouse model of Alzheimer disease

    PubMed Central

    Serrano, Mari Paz; Herrero-Labrador, Raquel; Futch, Hunter S.; Serrano, Julia; Romero, Alejandro; Fernandez, Ana Patricia; Samadi, Abdelouahid; Unzeta, Mercedes; Marco-Contelles, Jose; Martínez-Murillo, Ricardo

    2017-01-01

    Background The heterogeneity of Alzheimer disease requires the development of multitarget drugs for treating the symptoms of the disease and its progression. Both cholinergic and monoamine oxidase dysfunctions are involved in the pathological process. Thus, we hypothesized that the development of therapies focused on these targets might be effective. We have developed and assessed a new product, coded ASS234, a multipotent acetyl and butyrylcholinesterase/monoamine oxidase A–B inhibitor with a potent inhibitory effect on amyloid-β aggregation as well as antioxidant and antiapoptotic properties. But there is a need to reliably correlate in vitro and in vivo drug release data. Methods We examined the effect of ASS234 on cognition in healthy adult C57BL/6J mice in a model of scopolamine-induced cognitive impairment that often accompanies normal and pathological aging. Also, in a characterized transgenic APPswe/PS1ΔE9 mouse model of Alzheimer disease, we examined the effects of short-term ASS234 treatment on plaque deposition and gliosis using immunohistochemistry. Toxicology of ASS234 was assessed using a quantitative high-throughput in vitro cytotoxicity screening assay following the MTT assay method in HepG2 liver cells. Results In vivo, ASS234 significantly decreased scopolamine-induced learning deficits in C57BL/6J mice. Also, reduction of amyloid plaque burden and gliosis in the cortex and hippocampus was assessed. In vitro, ASS234 exhibited lesser toxicity than donepezil and tacrine. Limitations The study was conducted in male mice only. Although the Alzheimer disease model does not recapitulate all features of the human disease, it exhibits progressive monoaminergic neurodegeneration. Conclusion ASS234 is a promising alternative drug of choice to treat the cognitive decline and neurodegeneration underlying Alzheimer disease. PMID:27636528

  12. The proof-of-concept of ASS234: Peripherally administered ASS234 enters the central nervous system and reduces pathology in a male mouse model of Alzheimer disease.

    PubMed

    Serrano, Mari Paz; Herrero-Labrador, Raquel; Futch, Hunter S; Serrano, Julia; Romero, Alejandro; Fernandez, Ana Patricia; Samadi, Abdelouahid; Unzeta, Mercedes; Marco-Contelles, Jose; Martínez-Murillo, Ricardo

    2017-01-01

    The heterogeneity of Alzheimer disease requires the development of multitarget drugs for treating the symptoms of the disease and its progression. Both cholinergic and monoamine oxidase dysfunctions are involved in the pathological process. Thus, we hypothesized that the development of therapies focused on these targets might be effective. We have developed and assessed a new product, coded ASS234, a multipotent acetyl and butyrylcholinesterase/monoamine oxidase A-B inhibitor with a potent inhibitory effect on amyloid-β aggregation as well as antioxidant and antiapoptotic properties. But there is a need to reliably correlate in vitro and in vivo drug release data. We examined the effect of ASS234 on cognition in healthy adult C57BL/6J mice in a model of scopolamine-induced cognitive impairment that often accompanies normal and pathological aging. Also, in a characterized transgenic APPswe/PS1ΔE9 mouse model of Alzheimer disease, we examined the effects of short-term ASS234 treatment on plaque deposition and gliosis using immunohistochemistry. Toxicology of ASS234 was assessed using a quantitative high-throughput in vitro cytotoxicity screening assay following the MTT assay method in HepG2 liver cells. In vivo, ASS234 significantly decreased scopolamine-induced learning deficits in C57BL/6J mice. Also, reduction of amyloid plaque burden and gliosis in the cortex and hippocampus was assessed. In vitro, ASS234 exhibited lesser toxicity than donepezil and tacrine. The study was conducted in male mice only. Although the Alzheimer disease model does not recapitulate all features of the human disease, it exhibits progressive monoaminergic neurodegeneration. ASS234 is a promising alternative drug of choice to treat the cognitive decline and neurodegeneration underlying Alzheimer disease.

  13. 7 CFR 1280.234 - Suspension or termination.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... AGREEMENTS AND ORDERS; MISCELLANEOUS COMMODITIES), DEPARTMENT OF AGRICULTURE LAMB PROMOTION, RESEARCH, AND INFORMATION ORDER Lamb Promotion, Research, and Information Order Miscellaneous § 1280.234 Suspension or...

  14. (234)U/(238)U signatures associated with uranium ore bodies: part 2 Manyingee.

    PubMed

    Lowson, Richard T; McIntyre, Mark G

    2013-04-01

    The Manyingee ore body is a roll-front U ore body located at depth in the Cretaceous sandstone sediments of a Proterozoic palaeo valley. It is located in a confined aquifer. The aquifer is recharged 4 km upstream by the Ashburton River. Groundwater samples were collected at and up to 4.7 km downstream of the ore body. The ground water (234)U/(238)U activity ratios (AR) were elevated to 1.86 in the vicinity of the ore body and then declined to 1.06 over the 4.7 km transect. The elevated (234)U/(238)U ARs are attributed to selective leaching of (234)U sites by oxidising waters, with α recoil as a necessary precursor to produce activated (234)U sites. Direct ejection into another phase following α recoil is considered to be a minor contributor to (234)U -(238)U disequilibrium in this environment. The profile is considered to be typical of the (234)U/(238)U AR profile at and down gradient of the redox front of a U ore body. Crown Copyright © 2012. Published by Elsevier Ltd. All rights reserved.

  15. 45 CFR 234.11 - Assistance in the form of money payments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 2 2014-10-01 2012-10-01 true Assistance in the form of money payments. 234.11 Section 234.11 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY ASSISTANCE... Social Security Act to eligible families and individuals. Money payments are payments in cash, checks, or...

  16. 45 CFR 234.11 - Assistance in the form of money payments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 2 2011-10-01 2011-10-01 false Assistance in the form of money payments. 234.11 Section 234.11 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY ASSISTANCE... Social Security Act to eligible families and individuals. Money payments are payments in cash, checks, or...

  17. 48 CFR 52.234-2 - Notice of Earned Value Management System-Pre-Award IBR.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Management System-Pre-Award IBR. 52.234-2 Section 52.234-2 Federal Acquisition Regulations System FEDERAL... Provisions and Clauses 52.234-2 Notice of Earned Value Management System—Pre-Award IBR. As prescribed in 34.203(a) use the following provision: Notice of Earned Value Management System—Pre-Award IBR (JUL 2006...

  18. 48 CFR 52.234-2 - Notice of Earned Value Management System-Pre-Award IBR.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Management System-Pre-Award IBR. 52.234-2 Section 52.234-2 Federal Acquisition Regulations System FEDERAL... Provisions and Clauses 52.234-2 Notice of Earned Value Management System—Pre-Award IBR. As prescribed in 34.203(a) use the following provision: Notice of Earned Value Management System—Pre-Award IBR (JUL 2006...

  19. 48 CFR 52.234-2 - Notice of Earned Value Management System-Pre-Award IBR.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Management System-Pre-Award IBR. 52.234-2 Section 52.234-2 Federal Acquisition Regulations System FEDERAL... Provisions and Clauses 52.234-2 Notice of Earned Value Management System—Pre-Award IBR. As prescribed in 34.203(a) use the following provision: Notice of Earned Value Management System—Pre-Award IBR (JUL 2006...

  20. 48 CFR 52.234-2 - Notice of Earned Value Management System-Pre-Award IBR.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Management System-Pre-Award IBR. 52.234-2 Section 52.234-2 Federal Acquisition Regulations System FEDERAL... Provisions and Clauses 52.234-2 Notice of Earned Value Management System—Pre-Award IBR. As prescribed in 34.203(a) use the following provision: Notice of Earned Value Management System—Pre-Award IBR (JUL 2006...

  1. 48 CFR 52.234-2 - Notice of Earned Value Management System-Pre-Award IBR.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Management System-Pre-Award IBR. 52.234-2 Section 52.234-2 Federal Acquisition Regulations System FEDERAL... Provisions and Clauses 52.234-2 Notice of Earned Value Management System—Pre-Award IBR. As prescribed in 34.203(a) use the following provision: Notice of Earned Value Management System—Pre-Award IBR (JUL 2006...

  2. 49 CFR 234.243 - Wire on pole line and aerial cable.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Wire on pole line and aerial cable. 234.243... Maintenance, Inspection, and Testing Maintenance Standards § 234.243 Wire on pole line and aerial cable. Wire... bracket supported by a pole or other support. Wire shall not interfere with, or be interfered with by...

  3. 49 CFR 234.243 - Wire on pole line and aerial cable.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Wire on pole line and aerial cable. 234.243... Maintenance, Inspection, and Testing Maintenance Standards § 234.243 Wire on pole line and aerial cable. Wire... bracket supported by a pole or other support. Wire shall not interfere with, or be interfered with by...

  4. (234)U/(238)U signatures associated with uranium ore bodies: part 3 Koongarra.

    PubMed

    Lowson, Richard T

    2013-04-01

    The Koongarra ore body is an early Proterozoic U ore body in the Alligator Rivers U province, Northern Territory, Australia. It has surface expression with a redox front located ∼30 m below the surface. The (234)U/(238)U activity ratios (AR) for the ground water and the amorphous phase of the solid have been analysed for the ore zone and dispersion halo as a function of depth. The results display a (234)U/(238)U AR signature with depth which may be common to all U ore bodies. The (234)U/(238)U AR is depressed below secular equilibrium in the weathered material above the redox front; rises significantly above secular equilibrium in the vicinity of the redox front; and is followed by a gradual decrease with depth below the redox front. The amplitude of the profile is a function of local conditions. A model is proposed for the signature in which oxidising waters preferentially leach the (234)U sites at the redox front due to preconditioning of the (234)U sites by α recoil during the decay of (23)(8)U to (23)(4)U. Mass balance requires the solid material left behind the redox front to have a (234)U/(238)U AR reduced below 1. Local second order effects may be superimposed on the signature. The signature may have application to calibrating scenarios for nuclear waste repositories, assisting in understanding historical climates, economic evaluation of U ore bodies and U exploration. Copyright © 2012 Elsevier Ltd. All rights reserved.

  5. 49 CFR 234.241 - Protection of insulated wire; splice in underground wire.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Protection of insulated wire; splice in underground wire. 234.241 Section 234.241 Transportation Other Regulations Relating to Transportation... of insulated wire; splice in underground wire. Insulated wire shall be protected from mechanical...

  6. 49 CFR 234.241 - Protection of insulated wire; splice in underground wire.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Protection of insulated wire; splice in underground wire. 234.241 Section 234.241 Transportation Other Regulations Relating to Transportation... of insulated wire; splice in underground wire. Insulated wire shall be protected from mechanical...

  7. 27 CFR 41.234 - Corporate documents.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2013-04-01 2013-04-01 false Corporate documents. 41... Processed Tobacco § 41.234 Corporate documents. Every corporation that files an application for a permit as....231 a true copy of the corporate charter or a certificate of corporate existence or incorporation...

  8. 27 CFR 41.234 - Corporate documents.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2014-04-01 2014-04-01 false Corporate documents. 41... Processed Tobacco § 41.234 Corporate documents. Every corporation that files an application for a permit as....231 a true copy of the corporate charter or a certificate of corporate existence or incorporation...

  9. 45 CFR 234.11 - Assistance in the form of money payments.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 2 2012-10-01 2012-10-01 false Assistance in the form of money payments. 234.11... FINANCIAL ASSISTANCE TO INDIVIDUALS § 234.11 Assistance in the form of money payments. (a) Federal financial participation is available in money payments made under a State plan under title I, IV-A, X, XIV, or XVI of the...

  10. 45 CFR 234.11 - Assistance in the form of money payments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 2 2013-10-01 2012-10-01 true Assistance in the form of money payments. 234.11... FINANCIAL ASSISTANCE TO INDIVIDUALS § 234.11 Assistance in the form of money payments. (a) Federal financial participation is available in money payments made under a State plan under title I, IV-A, X, XIV, or XVI of the...

  11. 45 CFR 234.11 - Assistance in the form of money payments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 2 2010-10-01 2010-10-01 false Assistance in the form of money payments. 234.11... FINANCIAL ASSISTANCE TO INDIVIDUALS § 234.11 Assistance in the form of money payments. (a) Federal financial participation is available in money payments made under a State plan under title I, IV-A, X, XIV, or XVI of the...

  12. 5 CFR 591.234 - Under what circumstances may people recruited locally receive a post differential?

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Under what circumstances may people recruited locally receive a post differential? 591.234 Section 591.234 Administrative Personnel OFFICE OF... Post Differential-Nonforeign Areas Post Differentials § 591.234 Under what circumstances may people...

  13. 5 CFR 591.234 - Under what circumstances may people recruited locally receive a post differential?

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 1 2011-01-01 2011-01-01 false Under what circumstances may people recruited locally receive a post differential? 591.234 Section 591.234 Administrative Personnel OFFICE OF... Post Differential-Nonforeign Areas Post Differentials § 591.234 Under what circumstances may people...

  14. 5 CFR 591.234 - Under what circumstances may people recruited locally receive a post differential?

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 1 2013-01-01 2013-01-01 false Under what circumstances may people recruited locally receive a post differential? 591.234 Section 591.234 Administrative Personnel OFFICE OF... Post Differential-Nonforeign Areas Post Differentials § 591.234 Under what circumstances may people...

  15. 5 CFR 591.234 - Under what circumstances may people recruited locally receive a post differential?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 1 2014-01-01 2014-01-01 false Under what circumstances may people recruited locally receive a post differential? 591.234 Section 591.234 Administrative Personnel OFFICE OF... Post Differential-Nonforeign Areas Post Differentials § 591.234 Under what circumstances may people...

  16. 5 CFR 591.234 - Under what circumstances may people recruited locally receive a post differential?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 5 Administrative Personnel 1 2012-01-01 2012-01-01 false Under what circumstances may people recruited locally receive a post differential? 591.234 Section 591.234 Administrative Personnel OFFICE OF... Post Differential-Nonforeign Areas Post Differentials § 591.234 Under what circumstances may people...

  17. 49 CFR 234.271 - Insulated rail joints, bond wires, and track connections.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Insulated rail joints, bond wires, and track connections. 234.271 Section 234.271 Transportation Other Regulations Relating to Transportation (Continued... joints, bond wires, and track connections. Insulated rail joints, bond wires, and track connections shall...

  18. 49 CFR 234.271 - Insulated rail joints, bond wires, and track connections.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Insulated rail joints, bond wires, and track connections. 234.271 Section 234.271 Transportation Other Regulations Relating to Transportation (Continued... joints, bond wires, and track connections. Insulated rail joints, bond wires, and track connections shall...

  19. Residual β activity of particulate (234)Th as a novel proxy for tracking sediment resuspension in the ocean.

    PubMed

    Lin, Wuhui; Chen, Liqi; Zeng, Shi; Li, Tao; Wang, Yinghui; Yu, Kefu

    2016-06-02

    Sediment resuspension occurs in the global ocean, which greatly affects material exchange between the sediment and the overlying seawater. The behaviours of carbon, nutrients, heavy metals, and other pollutants at the sediment-seawater boundary will further link to climate change, eutrophication, and marine pollution. Residual β activity of particulate (234)Th (RAP234) is used as a novel proxy to track sediment resuspension in different marine environments, including the western Arctic Ocean, the South China Sea, and the Southern Ocean. Sediment resuspension identified by high activity of RAP234 is supported by different lines of evidence including seawater turbidity, residence time of total (234)Th, Goldschmidt's classification, and ratio of RAP234 to particulate organic carbon. A conceptual model is proposed to elucidate the mechanism for RAP234 with dominant contributions from (234)Th-(238)U and (212)Bi-(228)Th. The 'slope assumption' for RAP234 indicated increasing intensity of sediment resuspension from spring to autumn under the influence of the East Asian monsoon system. RAP234 can shed new light on (234)Th-based particle dynamics and should benefit the interpretation of historical (234)Th-(238)U database. RAP234 resembles lithophile elements and has broad implications for investigating particle dynamics in the estuary-shelf-slope-ocean continuum and linkage of the atmosphere-ocean-sediment system.

  20. Residual β activity of particulate 234Th as a novel proxy for tracking sediment resuspension in the ocean

    PubMed Central

    Lin, Wuhui; Chen, Liqi; Zeng, Shi; Li, Tao; Wang, Yinghui; Yu, Kefu

    2016-01-01

    Sediment resuspension occurs in the global ocean, which greatly affects material exchange between the sediment and the overlying seawater. The behaviours of carbon, nutrients, heavy metals, and other pollutants at the sediment-seawater boundary will further link to climate change, eutrophication, and marine pollution. Residual β activity of particulate 234Th (RAP234) is used as a novel proxy to track sediment resuspension in different marine environments, including the western Arctic Ocean, the South China Sea, and the Southern Ocean. Sediment resuspension identified by high activity of RAP234 is supported by different lines of evidence including seawater turbidity, residence time of total 234Th, Goldschmidt’s classification, and ratio of RAP234 to particulate organic carbon. A conceptual model is proposed to elucidate the mechanism for RAP234 with dominant contributions from 234Th-238U and 212Bi-228Th. The ‘slope assumption’ for RAP234 indicated increasing intensity of sediment resuspension from spring to autumn under the influence of the East Asian monsoon system. RAP234 can shed new light on 234Th-based particle dynamics and should benefit the interpretation of historical 234Th-238U database. RAP234 resembles lithophile elements and has broad implications for investigating particle dynamics in the estuary-shelf-slope-ocean continuum and linkage of the atmosphere-ocean-sediment system. PMID:27252085

  1. 48 CFR 252.234-7003 - Notice of Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Software Data Reporting System. (NOV 2010) 252.234-7003 Section 252.234-7003 Federal Acquisition... Software Data Reporting System. (NOV 2010) As prescribed in 234-7101(a)(1), use the following provision: Notice of Cost and Software Data Reporting System (NOV 2010) (a) This solicitation includes— (1) The...

  2. 48 CFR 252.234-7003 - Notice of Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Software Data Reporting System. (NOV 2010) 252.234-7003 Section 252.234-7003 Federal Acquisition... Software Data Reporting System. (NOV 2010) As prescribed in 234-7101(a)(1), use the following provision: Notice of Cost and Software Data Reporting System (NOV 2010) (a) This solicitation includes— (1) The...

  3. 48 CFR 252.234-7003 - Notice of Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Software Data Reporting System. (NOV 2010) 252.234-7003 Section 252.234-7003 Federal Acquisition... Software Data Reporting System. (NOV 2010) As prescribed in 234-7101(a)(1), use the following provision: NOTICE OF COST AND SOFTWARE DATA REPORTING SYSTEM (NOV 2010) (a) This solicitation includes— (1) The...

  4. 48 CFR 252.234-7003 - Notice of Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Software Data Reporting System. (NOV 2010) 252.234-7003 Section 252.234-7003 Federal Acquisition... Software Data Reporting System. (NOV 2010) As prescribed in 234-7101(a)(1), use the following provision: Notice of Cost and Software Data Reporting System (NOV 2010) (a) This solicitation includes— (1) The...

  5. 45 CFR 234.70 - Protective payments for the aged, blind, or disabled.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 2 2010-10-01 2010-10-01 false Protective payments for the aged, blind, or disabled. 234.70 Section 234.70 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY... disorientation, or severe memory loss. (2) There will be responsibility to assure referral to social services for...

  6. 14 CFR 234.11 - Disclosure to consumers.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    .... (b) For each domestic flight for which schedule information is available on its Web site, including domestic code-share flights, a reporting carrier shall display the following information regarding the...) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.11 Disclosure to consumers. (a...

  7. 14 CFR 234.11 - Disclosure to consumers.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    .... (b) For each domestic flight for which schedule information is available on its Web site, including domestic code-share flights, a reporting carrier shall display the following information regarding the...) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.11 Disclosure to consumers. (a...

  8. 14 CFR 234.11 - Disclosure to consumers.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    .... (b) For each domestic flight for which schedule information is available on its Web site, including domestic code-share flights, a reporting carrier shall display the following information regarding the...) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.11 Disclosure to consumers. (a...

  9. 14 CFR 234.11 - Disclosure to consumers.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    .... (b) For each domestic flight for which schedule information is available on its Web site, including domestic code-share flights, a reporting carrier shall display the following information regarding the...) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE REPORTS § 234.11 Disclosure to consumers. (a...

  10. Activity disequilibrium between 234U and 238U isotopes in natural environment.

    PubMed

    Boryło, Alicja; Skwarzec, Bogdan

    The aim of this work was to calculate the values of the 234 U/ 238 U activity ratio in natural environment (water, sediments, Baltic organisms and marine birds from various regions of the southern Baltic Sea; river waters (the Vistula and the Oder River); plants and soils collected near phosphogypsum waste heap in Wiślinka (Northern Poland) and deer-like animals from Northern Poland. On the basis of the studies it was found that the most important processes of uranium geochemical migration in the southern Baltic Sea ecosystem are the sedimentation of suspended material and the vertical diffusion from the sediments into the bottom water. Considerable values of the 234 U/ 238 U are characterized for the Vistula and Oder Rivers and its tributaries. The values of the 234 U/ 238 U activity ratio in different tissues and organs of the Baltic organisms, sea birds and wild deer are varied. Such a large variation value of obtained activity ratios indicates different behavior of uranium isotopes in the tissues and organisms of sea birds and wild animals. This value shows that uranium isotopes can be disposed at a slower or faster rate. The values of the 234 U/ 238 U activity ratio in the analyzed plants, soils and mosses collected in the vicinity of phosphogypsum dumps in Wiślinka are close to one and indicate the phosphogypsum origin of the analyzed nuclides. Uranium isotopes 234 U and 238 U are not present in radioactive equilibrium in the aquatic environment, which indicates that their activities are not equal. The inverse relationship is observed in the terrestrial environment, where the value of the of the 234 U/ 238 U activity ratio really oscillates around unity.

  11. 48 CFR 352.234-1 - Notice of earned value management system-pre-award Integrated Baseline Review.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... management system-pre-award Integrated Baseline Review. 352.234-1 Section 352.234-1 Federal Acquisition... Texts of Provisions and Clauses 352.234-1 Notice of earned value management system—pre-award Integrated... provision: Notice of Earned Value Management System—Pre-Award Integrated Baseline Review (October 2008) The...

  12. 48 CFR 352.234-2 - Notice of earned value management system-post-award Integrated Baseline Review.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... management system-post-award Integrated Baseline Review. 352.234-2 Section 352.234-2 Federal Acquisition... Texts of Provisions and Clauses 352.234-2 Notice of earned value management system—post-award Integrated... provision: Notice of Earned Value Management System—Post-Award Integrated Baseline Review (October 2008) (a...

  13. 48 CFR 352.234-2 - Notice of earned value management system-post-award Integrated Baseline Review.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... management system-post-award Integrated Baseline Review. 352.234-2 Section 352.234-2 Federal Acquisition... Texts of Provisions and Clauses 352.234-2 Notice of earned value management system—post-award Integrated... provision: Notice of Earned Value Management System—Post-Award Integrated Baseline Review (October 2008) (a...

  14. 48 CFR 352.234-2 - Notice of earned value management system-post-award Integrated Baseline Review.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... management system-post-award Integrated Baseline Review. 352.234-2 Section 352.234-2 Federal Acquisition... Texts of Provisions and Clauses 352.234-2 Notice of earned value management system—post-award Integrated... provision: Notice of Earned Value Management System—Post-Award Integrated Baseline Review (October 2008) (a...

  15. 48 CFR 352.234-1 - Notice of earned value management system-pre-award Integrated Baseline Review.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... management system-pre-award Integrated Baseline Review. 352.234-1 Section 352.234-1 Federal Acquisition... Texts of Provisions and Clauses 352.234-1 Notice of earned value management system—pre-award Integrated... provision: Notice of Earned Value Management System—Pre-Award Integrated Baseline Review (October 2008) The...

  16. 48 CFR 352.234-1 - Notice of earned value management system-pre-award Integrated Baseline Review.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... management system-pre-award Integrated Baseline Review. 352.234-1 Section 352.234-1 Federal Acquisition... Texts of Provisions and Clauses 352.234-1 Notice of earned value management system—pre-award Integrated... provision: Notice of Earned Value Management System—Pre-Award Integrated Baseline Review (October 2008) The...

  17. 48 CFR 352.234-2 - Notice of earned value management system-post-award Integrated Baseline Review.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... management system-post-award Integrated Baseline Review. 352.234-2 Section 352.234-2 Federal Acquisition... Texts of Provisions and Clauses 352.234-2 Notice of earned value management system—post-award Integrated... provision: Notice of Earned Value Management System—Post-Award Integrated Baseline Review (October 2008) (a...

  18. 48 CFR 352.234-1 - Notice of earned value management system-pre-award Integrated Baseline Review.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... management system-pre-award Integrated Baseline Review. 352.234-1 Section 352.234-1 Federal Acquisition... Texts of Provisions and Clauses 352.234-1 Notice of earned value management system—pre-award Integrated... provision: Notice of Earned Value Management System—Pre-Award Integrated Baseline Review (October 2008) The...

  19. (234)U/(238)U signatures associated with uranium ore bodies: part 1 Ranger 3.

    PubMed

    Lowson, Richard T; McIntyre, Mark G

    2013-04-01

    The Ranger 3 ore body is an early Proterozoic U ore body in the Alligator Rivers U province, Northern Territory, Australia. It has surface expression with a redox front located between 30 and 50 m below the surface. The ground water U concentration and (234)U/(238)U AR signature in the top 10 m of the weathered zone are reported for 357 samples collected over 4 wet seasons, at 5 depths, along a transect in-line with the hydraulic gradient and along the centre line of the ore body and its associated dispersion halo. The results show that the weathered zone displays a general U isotope feature for this type of ore body with the (234)U/(238)U AR for the ground water and amorphous phase of the solid matrix being less than 1. The ground water (234)U/(238)U AR is independent of the annual monsoonal climate and depth within the range surface to 10 m. In the vicinity of the U ore body the ground water (234)U/(238)U AR is 0.75 and is very similar to the (234)U/(238)U AR of the amorphous phase of the solid (0.76). The (234)U/(238)U ARs of the amorphous phase and ground water rise and separate to values of 0.88 and 1.02 at the end of the transect. The rise and separation in (234)U/(238)U AR are interpreted as evidence that the source of the U in the ground water is from the water-soluble sub-phase of the amorphous phase and that the ground water flow is too fast to allow the processes occurring across the solid-water interface to reach chemical equilibrium. The data set is a robust characterisation of the coarse and fine detail of the (234)U/(238)U AR signature in the weathered zone of U ore bodies. Copyright © 2012 Elsevier Ltd. All rights reserved.

  20. 24 CFR 234.17 - Mortgagor and mortgagee requirements for maintaining flood insurance coverage.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 2 2010-04-01 2010-04-01 false Mortgagor and mortgagee requirements for maintaining flood insurance coverage. 234.17 Section 234.17 Housing and Urban Development... maintaining flood insurance coverage. The maintenance of flood insurance coverage on the project by the...

  1. 43 CFR 2.34 - Where can I get a copy of DOI's FOIA annual report?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 1 2011-10-01 2011-10-01 false Where can I get a copy of DOI's FOIA annual report? 2.34 Section 2.34 Public Lands: Interior Office of the Secretary of the Interior RECORDS AND TESTIMONY; FREEDOM OF INFORMATION ACT FOIA Annual Report § 2.34 Where can I get a copy of DOI's FOIA annual report? Under 5 U.S.C. 552(e), DOI is...

  2. 24 CFR 234.285 - Waived title objections.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... have not been violated to a material extent. (f) Federal tax liens and rights of redemption arising... Commissioner will not object to an outstanding right of redemption in IRS if: (1) The Federal tax lien was... CONDOMINIUM OWNERSHIP MORTGAGE INSURANCE Contract Rights and Obligations-Individually Owned Units § 234.285...

  3. 48 CFR 352.234-2 - Notice of earned value management system-post-award Integrated Baseline Review.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Notice of earned value management system-post-award Integrated Baseline Review. 352.234-2 Section 352.234-2 Federal Acquisition Regulations System HEALTH AND HUMAN SERVICES CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Texts of Provisions and Clauses 352.234...

  4. 48 CFR 352.234-1 - Notice of earned value management system-pre-award Integrated Baseline Review.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Notice of earned value management system-pre-award Integrated Baseline Review. 352.234-1 Section 352.234-1 Federal Acquisition Regulations System HEALTH AND HUMAN SERVICES CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Texts of Provisions and Clauses 352.234-...

  5. 20 CFR 234.20 - Computation of the employee's 1937 Act LSDP basic amount.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... compensation and section 209 of the Social Security Act for a definition of creditable wages.) Closing date... 20 Employees' Benefits 1 2010-04-01 2010-04-01 false Computation of the employee's 1937 Act LSDP basic amount. 234.20 Section 234.20 Employees' Benefits RAILROAD RETIREMENT BOARD REGULATIONS UNDER THE...

  6. 48 CFR 252.234-7004 - Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 48 Federal Acquisition Regulations System 3 2012-10-01 2012-10-01 false Cost and Software Data... AND CONTRACT CLAUSES Text of Provisions And Clauses 252.234-7004 Cost and Software Data Reporting System. (NOV 2010) As prescribed in 234.7101(b)(1), use the following clause: Cost and Software Data...

  7. 48 CFR 252.234-7004 - Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 48 Federal Acquisition Regulations System 3 2014-10-01 2014-10-01 false Cost and Software Data... AND CONTRACT CLAUSES Text of Provisions And Clauses 252.234-7004 Cost and Software Data Reporting System. (NOV 2010) As prescribed in 234.7101(b)(1), use the following clause: Cost and Software Data...

  8. 48 CFR 252.234-7004 - Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 3 2011-10-01 2011-10-01 false Cost and Software Data... AND CONTRACT CLAUSES Text of Provisions And Clauses 252.234-7004 Cost and Software Data Reporting System. (NOV 2010) As prescribed in 234.7101(b)(1), use the following clause: COST AND SOFTWARE DATA...

  9. 48 CFR 252.234-7004 - Cost and Software Data Reporting System. (NOV 2010)

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 48 Federal Acquisition Regulations System 3 2013-10-01 2013-10-01 false Cost and Software Data... AND CONTRACT CLAUSES Text of Provisions And Clauses 252.234-7004 Cost and Software Data Reporting System. (NOV 2010) As prescribed in 234.7101(b)(1), use the following clause: Cost and Software Data...

  10. Geochemistry of speleothem records from southern Illinois: Development of (234U)/(238U) as a proxy for paleoprecipitation

    USGS Publications Warehouse

    Zhou, Juanzuo; Lundstrom, C.C.; Fouke, B.; Panno, S.; Hackley, K.; Curry, B.

    2005-01-01

    Natural waters universally show fractionation of uranium series (U-series) parent-daughter pairs, with the disequilibrium between 234U and 238U (234U)/(238U) commonly used as a tracer of groundwater flow. Because speleothems provide a temporal record of geochemical variations in groundwater precipitating calcite, (234U)/(238U) variations in speleothems provide a unique method of investigating water-rock interaction processes over millennium time scales. We present high precision Thermal Ionization Mass Spectrometric (TIMS) U-series analyses of speleothems and drip waters from Fogelpole Cave in southern Illinois. Data from all speleothems from the cave show an inverse correlation between (234U)/(238U) and U concentration, following the pattern observed in groundwaters globally. Within a 65-cm-long stalagmite, concordant 234U-238 U-230Th and 235U-231Pa ages for 5 samples indicate accurate chronology from 78.5 ka to 30 ka. Notably, (234U)/(238U)o which differs from most speleothems by having (234U)/(238U)o <1, positively correlates with speleothem growth rate. We generalize this to the observation that speleothems globally show (234U)/ (238U)o deviating farther from secular equilibrium at lower growth rates and approaching secular equilibrium at higher grow rates. Based on the Fogelpole observations, we suggest that groundwater (234U)/(238U) is controlled by the U oxidation state, the U concentration of the water and the fluid velocity. A transport model whereby U-series nuclides react and exchange with mineral surfaces can reproduce the observed trend between growth rate and (234U)/(238U)o. Based on this result, we suggest that (234U)/(238U)o in speleothems may record changes in hydrologic flux with time and thus could provide a useful proxy for long term records of paleoprecipitation. ?? 2005 Elsevier B.V. All rights reserved.

  11. 49 CFR 234.303 - Emergency notification systems for telephonic reporting of unsafe conditions at highway-rail and...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... reporting of unsafe conditions at highway-rail and pathway grade crossings. 234.303 Section 234.303... at Highway-Rail and Pathway Grade Crossings § 234.303 Emergency notification systems for telephonic reporting of unsafe conditions at highway-rail and pathway grade crossings. (a) Duty of dispatching railroad...

  12. 49 CFR 234.303 - Emergency notification systems for telephonic reporting of unsafe conditions at highway-rail and...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... reporting of unsafe conditions at highway-rail and pathway grade crossings. 234.303 Section 234.303... at Highway-Rail and Pathway Grade Crossings § 234.303 Emergency notification systems for telephonic reporting of unsafe conditions at highway-rail and pathway grade crossings. (a) Duty of dispatching railroad...

  13. 49 CFR 234.303 - Emergency notification systems for telephonic reporting of unsafe conditions at highway-rail and...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... reporting of unsafe conditions at highway-rail and pathway grade crossings. 234.303 Section 234.303... at Highway-Rail and Pathway Grade Crossings § 234.303 Emergency notification systems for telephonic reporting of unsafe conditions at highway-rail and pathway grade crossings. (a) Duty of dispatching railroad...

  14. 48 CFR 1052.234-71 - Notice of Earned Value Management System-Post-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Management System-Post-Award IBR (Core) AUG 2011 1052.234-71 Section 1052.234-71 Federal Acquisition... Texts of Provisions and Clauses 1052.234-71 Notice of Earned Value Management System—Post-Award IBR... require the contractor to use an earned value management system (EVMS) and for which the Government...

  15. 48 CFR 1052.234-70 - Notice of Earned Value Management System-Pre-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Management System-Pre-Award IBR (Core) AUG 2011 1052.234-70 Section 1052.234-70 Federal Acquisition... Texts of Provisions and Clauses 1052.234-70 Notice of Earned Value Management System—Pre-Award IBR (Core... require the Contractor to use an earned value management system (EVMS) and for which the Government...

  16. 48 CFR 1052.234-70 - Notice of Earned Value Management System-Pre-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Management System-Pre-Award IBR (Core) AUG 2011 1052.234-70 Section 1052.234-70 Federal Acquisition... Texts of Provisions and Clauses 1052.234-70 Notice of Earned Value Management System—Pre-Award IBR (Core... require the Contractor to use an earned value management system (EVMS) and for which the Government...

  17. 48 CFR 1052.234-71 - Notice of Earned Value Management System-Post-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Management System-Post-Award IBR (Core) AUG 2011 1052.234-71 Section 1052.234-71 Federal Acquisition... Texts of Provisions and Clauses 1052.234-71 Notice of Earned Value Management System—Post-Award IBR... require the contractor to use an earned value management system (EVMS) and for which the Government...

  18. 48 CFR 1052.234-71 - Notice of Earned Value Management System-Post-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Management System-Post-Award IBR (Core) AUG 2011 1052.234-71 Section 1052.234-71 Federal Acquisition... Texts of Provisions and Clauses 1052.234-71 Notice of Earned Value Management System—Post-Award IBR... require the contractor to use an earned value management system (EVMS) and for which the Government...

  19. 48 CFR 1052.234-70 - Notice of Earned Value Management System-Pre-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Management System-Pre-Award IBR (Core) AUG 2011 1052.234-70 Section 1052.234-70 Federal Acquisition... Texts of Provisions and Clauses 1052.234-70 Notice of Earned Value Management System—Pre-Award IBR (Core... require the Contractor to use an earned value management system (EVMS) and for which the Government...

  20. 48 CFR 1052.234-71 - Notice of Earned Value Management System-Post-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Management System-Post-Award IBR (Core) AUG 2011 1052.234-71 Section 1052.234-71 Federal Acquisition... Texts of Provisions and Clauses 1052.234-71 Notice of Earned Value Management System—Post-Award IBR... require the contractor to use an earned value management system (EVMS) and for which the Government...

  1. 48 CFR 1052.234-70 - Notice of Earned Value Management System-Pre-Award IBR (Core) AUG 2011

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Management System-Pre-Award IBR (Core) AUG 2011 1052.234-70 Section 1052.234-70 Federal Acquisition... Texts of Provisions and Clauses 1052.234-70 Notice of Earned Value Management System—Pre-Award IBR (Core... require the Contractor to use an earned value management system (EVMS) and for which the Government...

  2. WET FLUORIDE SEPARATION METHOD

    DOEpatents

    Seaborg, G.T.; Gofman, J.W.; Stoughton, R.W.

    1958-11-25

    The separation of U/sup 233/ from thorium, protactinium, and fission products present in neutron-irradiated thorium is accomplished by dissolving the irradiated materials in aqueous nitric acid, adding either a soluble fluoride, iodate, phosphate, or oxalate to precipltate the thorium, separating the precipltate from the solution, and then precipitating uranlum and protactinium by alkalizing the solution. The uranium and protactinium precipitate is removcd from the solution and dissolved in nitric acid. The uranyl nitrate may then be extracted from the acid solution by means of ether, and the protactinium recovered from the aqueous phase.

  3. Uranium-234 anomalies in authigenic uranium as a new oxygenation proxy in the Southern Ocean

    NASA Astrophysics Data System (ADS)

    Hayes, C. T.; Severmann, S.; Anderson, A.

    2016-12-01

    Authigenic uranium (aU) is a sensitive indicator for suboxic conditions in marine pore waters that has been used to reconstruct past oxygenation conditions or organic matter export. aU suffers, however, from possible post-depositional remobilization or "burn-down" when the depth of the oxygenation front in the sediments undergoes rapid changes. In terms of isotope composition, the 234U/238U activity ratio, or δ234U in per mil notation, of authigenic U will reflect the isotope ratio in seawater (147‰) which has been relatively stable (within 15‰) for at least one ocean residence time of U (about 400 kyr). The δ234U ratio in bulk marine sediments should then reflect the mixture of the seawater ratio and the ratio of detrital U (0‰ or somewhat negative). In careful analysis of bulk δ234U over a peak in aU from Southern Ocean core ODP-1094, I found ratios higher than seawater (up to 250‰), not explainable by isotope mixing of known sources. I propose a new diagenetic effect in which a partial reoxidation of an aU emplacement can cause 234U that has been alpha-recoiled from in-situ 238U decay to diffuse into the aU emplacement. This means that with aU records that may be slightly altered by reoxidation, careful tracking of δ234U will allow proper identification of the depth/size of the original aU emplacement. Therefore, δ234U of aU is a more robust redox tracer than elemental proxies alone. In this presentation, I will recount the evidence for this assertion and lay out future research targets.

  4. Thorium-234 as a tracer of spatial, temporal and vertical variability in particle flux in the North Pacific

    NASA Astrophysics Data System (ADS)

    Buesseler, K. O.; Pike, S.; Maiti, K.; Lamborg, C. H.; Siegel, D. A.; Trull, T. W.

    2009-07-01

    An extensive 234Th data set was collected at two sites in the North Pacific: ALOHA, an oligotrophic site near Hawaii, and K2, a mesotrophic HNLC site in the NW Pacific as part of the VERTIGO (VERtical Transport In the Global Ocean) study. Total 234Th: 238U activity ratios near 1.0 indicated low particle fluxes at ALOHA, while 234Th: 238U ˜0.6 in the euphotic zone at K2 indicated higher particle export. However, spatial variability was large at both sites—even greater than seasonal variability as reported in prior studies. This variability in space and time confounds the use of single profiles of 234Th for sediment trap calibration purposes. At K2, there was a decrease in export flux and increase in 234Th activities over time associated with the declining phase of a summer diatom bloom, which required the use of non-steady state models for flux predictions. This variability in space and time confounds the use of single profiles of 234Th for sediment trap calibration purposes. High vertical resolution profiles show narrow layers (20-30 m) of excess 234Th below the deep chlorophyll maximum at K2 associated with particle remineralization resulting in a decrease in flux at depth that may be missed with standard sampling for 234Th and/or with sediment traps. Also, the application of 234Th as POC flux tracer relies on accurate sampling of particulate POC/ 234Th ratios and here the ratio is similar on sinking particles and mid-sized particles collected by in-situ filtration (>10-50 μm at ALOHA and >5-350 μm at K2). To further address variability in particle fluxes at K2, a simple model of the drawdown of 234Th and nutrients is used to demonstrate that while coupled during export, their ratios in the water column will vary with time and depth after export. Overall these 234Th data provide a detailed view into particle flux and remineralization in the North Pacific over time and space scales that are varying over days to weeks, and 10's-100's km at a resolution that is

  5. The sediment budget of an urban coastal lagoon (Jamaica Bay, NY) determined using 234Th and 210Pb

    NASA Astrophysics Data System (ADS)

    Renfro, Alisha A.; Cochran, J. Kirk; Hirschberg, David J.; Bokuniewicz, Henry J.; Goodbred, Steven L.

    2016-10-01

    The sediment budget of Jamaica Bay (New York, USA) has been determined using the natural particle-reactive radionuclides 234Th and 210Pb. Inventories of excess thorium-234 (234Thxs, half-life = 24.1 d) were measured in bottom sediments of the Bay during four cruises from September 2004 to July 2006. The mean bay-wide inventory for the four sampling periods ranged from 3.5 to 5.0 dpm cm-2, four to six times that expected from 234Th production in the overlying water column. The presence of dissolved 234Th and a high specific activity of 234Thxs on particles at the bay inlet (∼30 dpm g-1) indicated that both dissolved and particulate 234Th could be imported into the bay from the ocean. Based on these observations, a mass balance of 234Th yields an annual input of ∼39 ± 14 × 1010 g sediment into the bay. Mass accumulation rates determined from profiles of excess 210Pb (half-life = 22.3 y) in sediment cores require annual sediment import of 7.4 ± 4.5 × 1010 g. Both radionuclides indicate that there is considerable marine-derived sediment import to Jamaica Bay, consistent with earlier work using 210Pb. Such sediment input may be important in sustaining longer-term accretion rates of salt marshes in the bay.

  6. 17 CFR 201.234 - Depositions upon written questions.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 17 Commodity and Securities Exchanges 2 2011-04-01 2011-04-01 false Depositions upon written... RULES OF PRACTICE Rules of Practice Initiation of Proceedings and Prehearing Rules § 201.234 Depositions upon written questions. (a) Availability. Depositions may be taken and submitted on written questions...

  7. 17 CFR 201.234 - Depositions upon written questions.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 17 Commodity and Securities Exchanges 2 2010-04-01 2010-04-01 false Depositions upon written... RULES OF PRACTICE Rules of Practice Initiation of Proceedings and Prehearing Rules § 201.234 Depositions upon written questions. (a) Availability. Depositions may be taken and submitted on written questions...

  8. 12 CFR 234.3 - Standards for payment systems.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... SYSTEM (CONTINUED) DESIGNATED FINANCIAL MARKET UTILITIES (REGULATION HH) § 234.3 Standards for payment systems. (a) A designated financial market utility that is designated on the basis of its role as the... arrangements for timely completion of daily processing. (8) The payment system provides a means of making...

  9. 12 CFR 234.3 - Standards for payment systems.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... SYSTEM (CONTINUED) DESIGNATED FINANCIAL MARKET UTILITIES (REGULATION HH) § 234.3 Standards for payment systems. (a) A designated financial market utility that is designated on the basis of its role as the... arrangements for timely completion of daily processing. (8) The payment system provides a means of making...

  10. PROCESS FOR CONTINUOUSLY SEPARATING IRRADIATION PRODUCTS OF THORIUM

    DOEpatents

    Hatch, L.P.; Miles, F.T.; Sheehan, T.V.; Wiswall, R.H.; Heus, R.J.

    1959-07-01

    A method is presented for separating uranium-233 and protactinium from thorium-232 containing compositions which comprises irradiating finely divided particles of said thorium with a neutron flux to form uranium-233 and protactinium, heating the neutron-irradiated composition in a fluorine and hydrogen atmosphere to form volatile fluorides of uranium and protactinium and thereafter separating said volatile fluorides from the thorium.

  11. Characterization of NopP, a Type III Secreted Effector of Rhizobium sp. Strain NGR234

    PubMed Central

    Ausmees, Nora; Kobayashi, Hajime; Deakin, William J.; Marie, Corinne; Krishnan, Hari B.; Broughton, William J.; Perret, Xavier

    2004-01-01

    The type three secretion system (TTSS) encoded by pNGR234a, the symbiotic plasmid of Rhizobium sp. strain NGR234, is responsible for the flavonoid- and NodD1-dependent secretion of nodulation outer proteins (Nops). Abolition of secretion of all or specific Nops significantly alters the nodulation ability of NGR234 on many of its hosts. In the closely related strain Rhizobium fredii USDA257, inactivation of the TTSS modifies the host range of the mutant so that it includes the improved Glycine max variety McCall. To assess the impact of individual TTSS-secreted proteins on symbioses with legumes, various attempts were made to identify nop genes. Amino-terminal sequencing of peptides purified from gels was used to characterize NopA, NopL, and NopX, but it failed to identify SR3, a TTSS-dependent product of USDA257. By using phage display and antibodies that recognize SR3, the corresponding protein of NGR234 was identified as NopP. NopP, like NopL, is an effector secreted by the TTSS of NGR234, and depending on the legume host, it may have a deleterious or beneficial effect on nodulation or it may have little effect. PMID:15231809

  12. 14 CFR 234.13 - Reports by air carriers on incidents involving animals during air transport.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Reports by air carriers on incidents involving animals during air transport. 234.13 Section 234.13 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS AIRLINE SERVICE QUALITY PERFORMANCE...

  13. 234U— 238U— 230Th— 232Th systematics in saline groundwaters from central Missouri

    NASA Astrophysics Data System (ADS)

    Banner, Jay L.; Wasserburg, G. J.; Chen, James H.; Moore, Clyde H.

    1990-12-01

    Saline groundwaters with 4.7 to 26‰ total dissolved solids were sampled from springs and artesian wells in Mississippian and Ordovician carbonates and sandstones in central Missouri. U—Th isotopic variations provide a means of evaluating processes of water-rock interaction and fluid mixing and estimating the time scales of element transport. Recently developed mass spectrometric techniques are used to make isotopic measurements on small-volume groundwater samples (0.1-4 l) with high precision (e.g., < ±5% for 234U/ 238U activity ratios). The groundwaters have a wide range of 238U concentrations, 50 × 10 -12 to 200 × 10 -12 g/g; 234U/ 234U activity ratios, 2.15-16.0; 232Th concentrations, 0.10 × 10 -12 to 33 × 10 -12 g/g; and 230Th concentrations, 0.91 × 10 -17 to 26 × 10 -17 g/g. Unfiltered and filtered (0.4 μm, 0.1 μm) aliquots of a saline sample have the same isotopic composition and concentration of U, indicating that 234U and 238U occur almost entirely as dissolved species. The concentration of 232Th is up to seven times lower in filtered vs. unfiltered aliquots, indicating that 232Th is predominantly associated with particulates in the groundwaters. In contrast, most of the 230Th is in solution. Previous geochemical studies indicate that: (1) the saline waters originated as meteoric recharge and evolved through halite dissolution, reactions with silicates and saline-dilute mixing processes during a long-distance flow history; and (2) interaction with limestone and dolomite aquifer rocks in central Missouri has been limited. A consistent relationship between U/Ca and 234U/ 238U activity ratio is observed in the groundwaters and provides constraints on the U/Ca ratios and 234U/ 238U activity ratios of end-member reservoirs and on the processes of isotopic exchange in this water-rock system. Model calculations that simulate (1) saline-dilute groundwater mixing and (2) limited extents of dissolution of carbonate aquifer minerals by the groundwaters

  14. 49 CFR 234.305 - Remedial actions in response to reports of unsafe conditions at highway-rail and pathway grade...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... conditions at highway-rail and pathway grade crossings. 234.305 Section 234.305 Transportation Other... Pathway Grade Crossings § 234.305 Remedial actions in response to reports of unsafe conditions at highway-rail and pathway grade crossings. (a) General rule on response to credible report of warning system...

  15. 49 CFR 234.305 - Remedial actions in response to reports of unsafe conditions at highway-rail and pathway grade...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... conditions at highway-rail and pathway grade crossings. 234.305 Section 234.305 Transportation Other... Pathway Grade Crossings § 234.305 Remedial actions in response to reports of unsafe conditions at highway-rail and pathway grade crossings. (a) General rule on response to credible report of warning system...

  16. 49 CFR 234.305 - Remedial actions in response to reports of unsafe conditions at highway-rail and pathway grade...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... conditions at highway-rail and pathway grade crossings. 234.305 Section 234.305 Transportation Other... Pathway Grade Crossings § 234.305 Remedial actions in response to reports of unsafe conditions at highway-rail and pathway grade crossings. (a) General rule on response to credible report of warning system...

  17. 45 CFR 234.130 - Assistance in the form of institutional services in intermediate care facilities.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 2 2012-10-01 2012-10-01 false Assistance in the form of institutional services in intermediate care facilities. 234.130 Section 234.130 Public Welfare Regulations Relating to Public Welfare OFFICE OF FAMILY ASSISTANCE (ASSISTANCE PROGRAMS), ADMINISTRATION FOR CHILDREN AND FAMILIES, DEPARTMENT OF HEALTH AND HUMAN SERVICES...

  18. Separation of protactinum, actinium, and other radionuclides from proton irradiated thorium target

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Fassbender, Michael E.; Radchenko, Valery

    Protactinium, actinium, radium, radiolanthanides and other radionuclide fission products were separated and recovered from a proton-irradiated thorium target. The target was dissolved in concentrated HCl, which formed anionic complexes of protactinium but not with thorium, actinium, radium, or radiolanthanides. Protactinium was separated from soluble thorium by loading a concentrated HCl solution of the target onto a column of strongly basic anion exchanger resin and eluting with concentrated HCl. Actinium, radium and radiolanthanides elute with thorium. The protactinium that is retained on the column, along with other radionuclides, is eluted may subsequently treated to remove radionuclide impurities to afford a fractionmore » of substantially pure protactinium. The eluate with the soluble thorium, actinium, radium and radiolanthanides may be subjected to treatment with citric acid to form anionic thorium, loaded onto a cationic exchanger resin, and eluted. Actinium, radium and radiolanthanides that are retained can be subjected to extraction chromatography to separate the actinium from the radium and from the radio lanthanides.« less

  19. 234Th: 238U disequilibrium as an indicator of sediment resuspension in Thermaikos Gulf, northwestern Aegean Sea

    NASA Astrophysics Data System (ADS)

    Muir, G. K. P.; Pates, J. M.; Karageorgis, A. P.; Kaberi, H.

    2005-12-01

    234Th: 238U disequilibria have been used extensively as tracers of particle dynamics in marine environments. 234Th ( t1/2=24.1 days) can be used as "proxy" for particle reactive pollutants, due to their similar rapid rate of scavenging onto particles and subsequent removal from the water column, to the sediments. Radioactive disequilibrium can be exploited to determine the rates and time-scales of processes occurring over days to months; in this instance the residence times of dissolved and particulate species with the benthic nepheloid layer (BNL). Three sampling cruises were undertaken in Thermaikos Gulf (NW Aegean Sea) during contrasting periods, to examine the impact of natural and anthropogenic activity on sediment resuspension. September and October 2001 represented background and trawling periods, respectively; January 2002 represented a mixed period, of trawling and storms. Dissolved 234Th is scavenged actively at the BNL, in the presence of suspended particulate material (SPM), with a mean residence time of 16 days. There is a weak inverse correlation between dissolved 234Th residence time and SPM concentration in the BNL, with the shortest residence times occurring during October 2001. No relationship was observed between particulate 234Th activities and SPM concentrations, indicating that particles are rapidly removed from the system, either by sinking or advection. The mean particulate 234Th residence time is 5 days.

  20. Dissolution behaviour of 238U, 234U and 230Th deposited on filters from personal dosemeters.

    PubMed

    Becková, Vera; Malátová, Irena

    2008-01-01

    Kinetics of dissolution of (238)U, (234)U and (230)Th dust deposited on filters from personal alpha dosemeters was studied by means of a 26-d in vitro dissolution test with a serum ultrafiltrate simulant. Dosemeters had been used by miners at the uranium mine 'Dolní Rozínka' at Rozná, Czech Republic. The sampling flow-rate as declared by the producer is 4 l h(-1) and the sampling period is typically 1 month. Studied filters contained 125 +/- 6 mBq (238)U in equilibrium with (234)U and (230)Th; no (232)Th series nuclides were found. Half-time of rapid dissolution of 1.4 d for (238)U and (234)U and slow dissolution half-times of 173 and 116 d were found for (238)U and (234)U, respectively. No detectable dissolution of (230)Th was found.

  1. 7 CFR 23.4 - State Rural Development Advisory Council.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 23.4 Agriculture Office of the Secretary of Agriculture STATE AND REGIONAL ANNUAL PLANS OF WORK State... Development Advisory Council will insure that programs proposed under title V including regional programs... research and extension plan which would impact directly on rural development activities being developed or...

  2. 7 CFR 23.4 - State Rural Development Advisory Council.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 23.4 Agriculture Office of the Secretary of Agriculture STATE AND REGIONAL ANNUAL PLANS OF WORK State... Development Advisory Council will insure that programs proposed under title V including regional programs... research and extension plan which would impact directly on rural development activities being developed or...

  3. 7 CFR 23.4 - State Rural Development Advisory Council.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 23.4 Agriculture Office of the Secretary of Agriculture STATE AND REGIONAL ANNUAL PLANS OF WORK State... Development Advisory Council will insure that programs proposed under title V including regional programs... research and extension plan which would impact directly on rural development activities being developed or...

  4. 7 CFR 23.4 - State Rural Development Advisory Council.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 23.4 Agriculture Office of the Secretary of Agriculture STATE AND REGIONAL ANNUAL PLANS OF WORK State... Development Advisory Council will insure that programs proposed under title V including regional programs... research and extension plan which would impact directly on rural development activities being developed or...

  5. 49 CFR 234.273 - Results of inspections and tests.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Results of inspections and tests. 234.273 Section....273 Results of inspections and tests. (a) Results of inspections and tests made in compliance with.../DOT inventory number, place and date, equipment tested, results of tests, repairs, replacements...

  6. 49 CFR 234.273 - Results of inspections and tests.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Results of inspections and tests. 234.273 Section....273 Results of inspections and tests. (a) Results of inspections and tests made in compliance with.../DOT inventory number, place and date, equipment tested, results of tests, repairs, replacements...

  7. 49 CFR 234.273 - Results of inspections and tests.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Results of inspections and tests. 234.273 Section....273 Results of inspections and tests. (a) Results of inspections and tests made in compliance with.../DOT inventory number, place and date, equipment tested, results of tests, repairs, replacements...

  8. 48 CFR 52.234-4 - Earned Value Management System.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Earned Value Management....234-4 Earned Value Management System. As prescribed in 34.203(c), insert the following clause: Earned Value Management System (JUL 2006) (a) The Contractor shall use an earned value management system (EVMS...

  9. 48 CFR 52.234-4 - Earned Value Management System.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 48 Federal Acquisition Regulations System 2 2013-10-01 2013-10-01 false Earned Value Management....234-4 Earned Value Management System. As prescribed in 34.203(c), insert the following clause: Earned Value Management System (JUL 2006) (a) The Contractor shall use an earned value management system (EVMS...

  10. 48 CFR 52.234-4 - Earned Value Management System.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 48 Federal Acquisition Regulations System 2 2012-10-01 2012-10-01 false Earned Value Management....234-4 Earned Value Management System. As prescribed in 34.203(c), insert the following clause: Earned Value Management System (JUL 2006) (a) The Contractor shall use an earned value management system (EVMS...

  11. 48 CFR 52.234-4 - Earned Value Management System.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 48 Federal Acquisition Regulations System 2 2014-10-01 2014-10-01 false Earned Value Management....234-4 Earned Value Management System. As prescribed in 34.203(c), insert the following clause: Earned Value Management System (MAY 2014) (a) The Contractor shall use an earned value management system (EVMS...

  12. 48 CFR 52.234-4 - Earned Value Management System.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 2 2011-10-01 2011-10-01 false Earned Value Management....234-4 Earned Value Management System. As prescribed in 34.203(c), insert the following clause: Earned Value Management System (JUL 2006) (a) The Contractor shall use an earned value management system (EVMS...

  13. 49 CFR 234.239 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... with signal apparatus. 234.239 Section 234.239 Transportation Other Regulations Relating to... Tagging of wires and interference of wires or tags with signal apparatus. Each wire shall be tagged or... of the apparatus. This requirement applies to each wire at each terminal in all housings including...

  14. 49 CFR 234.239 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... with signal apparatus. 234.239 Section 234.239 Transportation Other Regulations Relating to... Tagging of wires and interference of wires or tags with signal apparatus. Each wire shall be tagged or... of the apparatus. This requirement applies to each wire at each terminal in all housings including...

  15. 48 CFR 1852.234-2 - Earned Value Management System.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 6 2011-10-01 2011-10-01 false Earned Value Management... and Clauses 1852.234-2 Earned Value Management System. As prescribed in 1834.203-70(b) insert the following clause: Earned Value Management System (NOV 2006) (a) In the performance of this contract, the...

  16. 48 CFR 1852.234-2 - Earned Value Management System.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Earned Value Management... and Clauses 1852.234-2 Earned Value Management System. As prescribed in 1834.203-70(b) insert the following clause: Earned Value Management System (NOV 2006) (a) In the performance of this contract, the...

  17. 49 CFR 234.247 - Purpose of inspections and tests; removal from service of relay or device failing to meet test...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... operations over the grade crossing resume. (c) Any electronic device, relay, or other electromagnetic device... service of relay or device failing to meet test requirements. 234.247 Section 234.247 Transportation Other... Inspections and Tests § 234.247 Purpose of inspections and tests; removal from service of relay or device...

  18. Evaluation of processes occurring in the bottom nepheloid layer (BNL) of an eastern Mediterranean area using 234Th/238U disequilibria.

    PubMed

    Evangeliou, Nikolaos; Florou, Heleny

    2013-09-01

    Particle-reactive radionuclide (234)Th and its ratios with the conservative (238)U were used to trace the marine processes occurring over short timescales in the bottom nepheloid layer (BNL) of seven stations in the Saronikos Gulf and the Elefsis Bay (Greece) during three seasons (summer 2008, autumn 2008 and winter 2009). Summer was considered as a steady season where low physical processes occur and stratification is well established, autumn as a commutative period and winter as period of extensive trawling and physical activities. The obtained ratio profiles showed excess of (234)Th relative to (238)U in the BNL of the sampling area during summer, caused by the dissolved fraction of (234)Th. During autumn, the situation was different with large (234)Th deficit throughout the water column leading to large export fluxes of particles from the water column. Finally, during winter the ratios showed that predominant phenomenon in the area was likely resuspension of bottom sediments. The resuspension signature was additionally evaluated by total suspended matter (TSM) inventories in the BNL. Despite the intense resuspension, small scavenging of dissolved (234)Th was recorded in the BNL resulting in high residence times of dissolved (234)Th. A 1 order of magnitude difference between dissolved and particulate (234)Th residence times was observed indicating that scavenging from dissolved to particulate (234)Th could be highly variable and, as a result, the Saronikos Gulf is a highly dynamic environment, in terms of temporal and spatial particle uptake and removal. Comparing these values to literature ones consistent results were obtained. The possibility of sediment resuspension in the BNL during winter was amplified by the bloom of phytoplankton resulting in even decreased residence times of particulate (234)Th (average values). In contrast, the respective residence times of the dissolved fraction of (234)Th in the BNL were higher showing a maximum in winter at the

  19. 40 CFR 86.233-94-86.234-94 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES Emission Regulations for 1994 and Later Model Year Gasoline-Fueled New Light-Duty Vehicles, New Light-Duty Trucks and New Medium-Duty Passenger Vehicles; Cold Temperature Test Procedures §§ 86.233-94—86.234-94 [Reserved] ...

  20. 49 CFR 234.237 - Reverse switch cut-out circuit.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Reverse switch cut-out circuit. 234.237 Section....237 Reverse switch cut-out circuit. A switch, when equipped with a switch circuit controller connected... warning system can only be cut out when the switch point is within one-half inch of full reverse position. ...

  1. 49 CFR 234.237 - Reverse switch cut-out circuit.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Reverse switch cut-out circuit. 234.237 Section....237 Reverse switch cut-out circuit. A switch, when equipped with a switch circuit controller connected... warning system can only be cut out when the switch point is within one-half inch of full reverse position. ...

  2. 49 CFR 234.237 - Reverse switch cut-out circuit.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Reverse switch cut-out circuit. 234.237 Section....237 Reverse switch cut-out circuit. A switch, when equipped with a switch circuit controller connected... warning system can only be cut out when the switch point is within one-half inch of full reverse position. ...

  3. 49 CFR 234.205 - Operating characteristics of warning system apparatus.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Operating characteristics of warning system... Maintenance Standards § 234.205 Operating characteristics of warning system apparatus. Operating... system shall be maintained in accordance with the limits within which the system is designed to operate. ...

  4. 49 CFR 234.205 - Operating characteristics of warning system apparatus.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Operating characteristics of warning system... Maintenance Standards § 234.205 Operating characteristics of warning system apparatus. Operating... system shall be maintained in accordance with the limits within which the system is designed to operate. ...

  5. 49 CFR 234.205 - Operating characteristics of warning system apparatus.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Operating characteristics of warning system... Maintenance Standards § 234.205 Operating characteristics of warning system apparatus. Operating... system shall be maintained in accordance with the limits within which the system is designed to operate. ...

  6. The study of structure in 224-234 thorium nuclei within the framework IBM

    NASA Astrophysics Data System (ADS)

    Lee, Su Youn; Lee, Young Jun; Lee, J. H.

    2017-09-01

    An investigation has been made of the behaviour of nuclear structure as a function of an increase in neutron number from 224Th to 234Th. Thorium of mass number 234 is a typical rotor nucleus that can be explained by the SU(3) limit of the interacting boson model(IBM) in the algebraic nuclear model. Furthermore, 224-232Th lie on the path of the symmetry-breaking phase transition. Moreover, the nuclear structure of 224Th can be explained using X(5) symmetry. However, as 226-230Th nuclei are not fully symmetrical nuclei, they can be represented by adding a perturbed term to express symmetry breaking. Through the following three calculation steps, we identified the tendency of change in nuclear structure. Firstly, the structure of 232Th is described using the matrix elements of the Hamiltonian and the electric quadrupole operator between basis states of the SU(3) limit in IBM. Secondly, the low-lying energy levels and E2 transition ratios corresponding to the observable physical values are calculated by adding a perturbed term with the first-order Casimir operator of the U(5) limit to the SU(3) Hamiltonian in IBM. We compared the results with experimental data of 224-234Th. Lastly, the potential of the Bohr Hamiltonian is represented by a harmonic oscillator, as a result of which the structure of 224-234Th could be expressed in closed form by an approximate separation of variables. The results of these theoretical predictions clarify nuclear structure changes in Thorium nuclei over mass numbers of practical significance.

  7. 16 CFR 23.4 - Misrepresentation as to gold content.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... JEWELRY, PRECIOUS METALS, AND PEWTER INDUSTRIES § 23.4 Misrepresentation as to gold content. (a) It is... covered with a base metal (such as nickel), which is covered with a thin wash of gold, unless there is a disclosure that the primary gold coating is covered with a base metal, which is gold washed. (7) Use of the...

  8. 16 CFR 23.4 - Misrepresentation as to gold content.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... JEWELRY, PRECIOUS METALS, AND PEWTER INDUSTRIES § 23.4 Misrepresentation as to gold content. (a) It is... covered with a base metal (such as nickel), which is covered with a thin wash of gold, unless there is a disclosure that the primary gold coating is covered with a base metal, which is gold washed. (7) Use of the...

  9. 16 CFR 23.4 - Misrepresentation as to gold content.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... JEWELRY, PRECIOUS METALS, AND PEWTER INDUSTRIES § 23.4 Misrepresentation as to gold content. (a) It is... covered with a base metal (such as nickel), which is covered with a thin wash of gold, unless there is a disclosure that the primary gold coating is covered with a base metal, which is gold washed. (7) Use of the...

  10. 234U/238U evidence for local recharge and patterns of groundwater flow in the vicinity of Yucca Mountain, Nevada, USA

    USGS Publications Warehouse

    Paces, J.B.; Ludwig, K. R.; Peterman, Z.E.; Neymark, L.A.

    2002-01-01

    Uranium concentrations and 234U/238U ratios in saturated-zone and perched ground water were used to investigate hydrologic flow and downgradient dilution and dispersion in the vicinity of Yucca Mountain, a potential high-level radioactive waste disposal site. The U data were obtained by thermal ionization mass spectrometry on more than 280 samples from the Death Valley regional flow system. Large variations in both U concentrations (commonly 0.6-10 ??g 1-1) and 234U/238U activity ratios (commonly 1.5-6) are present on both local and regional scales; however, ground water with 234U/238U activity ratios from 7 up to 8.06 is restricted largely to samples from Yucca Mountain. Data from ground water in the Tertiary volcanic and Quaternary alluvial aquifers at and adjacent to Yucca Mountain plot in 3 distinct fields of reciprocal U concentration versus 234U/238U activity ratio correlated to different geographic areas. Ground water to the west of Yucca Mountain has large U concentrations and moderate 234U/238U whereas ground water to the east in the Fortymile flow system has similar 234U/238U, but distinctly smaller U concentrations. Ground water beneath the central part of Yucca Mountain has intermediate U concentrations but distinctive 234U/238U activity ratios of about 7-8. Perched water from the lower part of the unsaturated zone at Yucca Mountain has similarly large values of 234U/238U. These U data imply that the Tertiary volcanic aquifer beneath the central part of Yucca Mountain is isolated from north-south regional flow. The similarity of 234U/238U in both saturated- and unsaturated-zone ground water at Yucca Mountain further indicates that saturated-zone ground water beneath Yucca Mountain is dominated by local recharge rather than regional flow. The distinctive 234U/238U signatures also provide a natural tracer of downgradient flow. Elevated 234U/238U in ground water from two water-supply wells east of Yucca Mountain are interpreted as the result of induced

  11. 49 CFR 234.7 - Accidents involving grade crossing signal failure.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Accidents involving grade crossing signal failure..., STATE ACTION PLANS, AND EMERGENCY NOTIFICATION SYSTEMS Reports and Plans § 234.7 Accidents involving... railroad equipment and an automobile, bus, truck, motorcycle, bicycle, farm vehicle, or pedestrian at a...

  12. 49 CFR 234.7 - Accidents involving grade crossing signal failure.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Accidents involving grade crossing signal failure..., STATE ACTION PLANS, AND EMERGENCY NOTIFICATION SYSTEMS Reports and Plans § 234.7 Accidents involving... railroad equipment and an automobile, bus, truck, motorcycle, bicycle, farm vehicle, or pedestrian at a...

  13. 49 CFR 234.7 - Accidents involving grade crossing signal failure.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Accidents involving grade crossing signal failure..., STATE ACTION PLANS, AND EMERGENCY NOTIFICATION SYSTEMS Reports and Plans § 234.7 Accidents involving... railroad equipment and an automobile, bus, truck, motorcycle, bicycle, farm vehicle, or pedestrian at a...

  14. 234. Photocopy of drawing (1958 piping drawing by the Ralph ...

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

    234. Photocopy of drawing (1958 piping drawing by the Ralph M. Parsons Company) BOOSTER LIQUID OXYGEN SYSTEM FLOW DIAGRAM FOR THE LSB, SHEET P2 OF 36 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  15. 49 CFR 234.7 - Accidents involving grade crossing signal failure.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Accidents involving grade crossing signal failure... PLANS Reports and Plans § 234.7 Accidents involving grade crossing signal failure. (a) Each railroad shall report to FRA every impact between on-track railroad equipment and an automobile, bus, truck...

  16. 49 CFR 234.7 - Accidents involving grade crossing signal failure.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Accidents involving grade crossing signal failure... PLANS Reports and Plans § 234.7 Accidents involving grade crossing signal failure. (a) Each railroad shall report to FRA every impact between on-track railroad equipment and an automobile, bus, truck...

  17. 49 CFR 234.253 - Flashing light units and lamp voltage.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Flashing light units and lamp voltage. 234.253....253 Flashing light units and lamp voltage. (a) Each flashing light unit shall be inspected when... with installation specifications. (b) Lamp voltage shall be tested when installed and at least once...

  18. 49 CFR 234.253 - Flashing light units and lamp voltage.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Flashing light units and lamp voltage. 234.253....253 Flashing light units and lamp voltage. (a) Each flashing light unit shall be inspected when... with installation specifications. (b) Lamp voltage shall be tested when installed and at least once...

  19. 49 CFR 234.253 - Flashing light units and lamp voltage.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Flashing light units and lamp voltage. 234.253....253 Flashing light units and lamp voltage. (a) Each flashing light unit shall be inspected when... with installation specifications. (b) Lamp voltage shall be tested when installed and at least once...

  20. Method of increasing the deterrent to proliferation of nuclear fuels

    DOEpatents

    Rampolla, Donald S.

    1982-01-01

    A process of recycling protactinium-231 to enhance the utilization of radioactively hot uranium-232 in nuclear fuel for the purpose of making both fresh and spent fuel more resistant to proliferation. The uranium-232 may be obtained by the irradiation of protactinium-231 which is normally found in the spent fuel rods of a thorium base nuclear reactor. The production of protactinium-231 and uranium-232 would be made possible by the use of the thorium uranium-233 fuel cycle in power reactors.

  1. NopB, a type III secreted protein of Rhizobium sp. strain NGR234, is associated with pilus-like surface appendages.

    PubMed

    Saad, Maged M; Kobayashi, Hajime; Marie, Corinne; Brown, Ian R; Mansfield, John W; Broughton, William J; Deakin, William J

    2005-02-01

    Rhizobium sp. strain NGR234 possesses a functional type three secretion system (TTSS), through which a number of proteins, called nodulation outer proteins (Nops), are delivered to the outside of the cell. A major constraint to the identification of Nops is their low abundance in the supernatants of NGR234 strains grown in culture. To overcome this limitation, a more sensitive proteomics-based strategy was developed. Secreted proteins from wild-type NGR234 were separated by two-dimensional gel electrophoresis, and the gel was compared to similar gels containing the proteins from a TTSS mutant (NGROmegarhcN). To identify the proteins, spots unique to the NGR234 gels were analyzed by matrix-assisted laser desorption ionization-time of flight mass spectrometry and the data were compared to the sequence of the symbiotic plasmid of NGR234. A nonpolar mutant of one of these proteins was generated called NopB. NopB is required for Nop secretion but inhibits the interaction with Pachyrhizus tuberosus and augments nodulation of Tephrosia vogelii. Flavonoids and a functional TTSS are required for the formation of some surface appendages on NGR234. In situ immunogold labeling and isolation of these pili showed that they contain NopB.

  2. NopB, a Type III Secreted Protein of Rhizobium sp. Strain NGR234, Is Associated with Pilus-Like Surface Appendages

    PubMed Central

    Saad, Maged M.; Kobayashi, Hajime; Marie, Corinne; Brown, Ian R.; Mansfield, John W.; Broughton, William J.; Deakin, William J.

    2005-01-01

    Rhizobium sp. strain NGR234 possesses a functional type three secretion system (TTSS), through which a number of proteins, called nodulation outer proteins (Nops), are delivered to the outside of the cell. A major constraint to the identification of Nops is their low abundance in the supernatants of NGR234 strains grown in culture. To overcome this limitation, a more sensitive proteomics-based strategy was developed. Secreted proteins from wild-type NGR234 were separated by two-dimensional gel electrophoresis, and the gel was compared to similar gels containing the proteins from a TTSS mutant (NGRΩrhcN). To identify the proteins, spots unique to the NGR234 gels were analyzed by matrix-assisted laser desorption ionization-time of flight mass spectrometry and the data were compared to the sequence of the symbiotic plasmid of NGR234. A nonpolar mutant of one of these proteins was generated called NopB. NopB is required for Nop secretion but inhibits the interaction with Pachyrhizus tuberosus and augments nodulation of Tephrosia vogelii. Flavonoids and a functional TTSS are required for the formation of some surface appendages on NGR234. In situ immunogold labeling and isolation of these pili showed that they contain NopB. PMID:15659692

  3. 49 CFR 234.306 - Multiple dispatching or maintaining railroads with respect to the same highway-rail or pathway...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... respect to the same highway-rail or pathway grade crossing; appointment of responsible railroad. 234.306... Conditions at Highway-Rail and Pathway Grade Crossings § 234.306 Multiple dispatching or maintaining railroads with respect to the same highway-rail or pathway grade crossing; appointment of responsible...

  4. 49 CFR 234.306 - Multiple dispatching or maintaining railroads with respect to the same highway-rail or pathway...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... respect to the same highway-rail or pathway grade crossing; appointment of responsible railroad. 234.306... Conditions at Highway-Rail and Pathway Grade Crossings § 234.306 Multiple dispatching or maintaining railroads with respect to the same highway-rail or pathway grade crossing; appointment of responsible...

  5. 49 CFR 234.306 - Multiple dispatching or maintaining railroads with respect to the same highway-rail or pathway...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... respect to the same highway-rail or pathway grade crossing; appointment of responsible railroad. 234.306... Conditions at Highway-Rail and Pathway Grade Crossings § 234.306 Multiple dispatching or maintaining railroads with respect to the same highway-rail or pathway grade crossing; appointment of responsible...

  6. 49 CFR 234.219 - Gate arm lights and light cable.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Gate arm lights and light cable. 234.219 Section....219 Gate arm lights and light cable. Each gate arm light shall be maintained in such condition to be properly visible to approaching highway users. Lights and light wire shall be secured to the gate arm. ...

  7. 49 CFR 234.219 - Gate arm lights and light cable.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Gate arm lights and light cable. 234.219 Section....219 Gate arm lights and light cable. Each gate arm light shall be maintained in such condition to be properly visible to approaching highway users. Lights and light wire shall be secured to the gate arm. ...

  8. 49 CFR 234.219 - Gate arm lights and light cable.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Gate arm lights and light cable. 234.219 Section....219 Gate arm lights and light cable. Each gate arm light shall be maintained in such condition to be properly visible to approaching highway users. Lights and light wire shall be secured to the gate arm. ...

  9. High-precision determination of {sup 234}U/{sup 238}U activity ratios in natural waters and carbonates by ICPMS

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Ketterer, M.E.; Khourey, C.J.

    1998-12-31

    A method has been developed for precise measurement of {sup 234}U/{sup 238}U activity ratios in natural waters and carbonates using quadrupole inductively coupled plasma mass spectrometry. A recovery of 80--85% of seawater U is achieved by Fe(III) coprecipitation followed by extraction chromatography with a supported dipentyl pentane phosphonate material; 90--95% of U is recovered from carbonates, which are dissolved in HNO{sub 3} and subjected to the same extraction chromatographic preparation. Isotopic measurements are made via recirculating pneumatic nebulization of small volumes of solutions containing 0.5--5 mg/L U. {sup 234}U/{sup 235}U is measured as a proxy for determination of {sup 234}U/{supmore » 238}U; iridium is added to sample solutions and the ion ratio {sup 191}Ir{sup 40}Ar{sup +}/{sup 193}Ir{sup 40}Ar{sup +} is measured for internal mass discrimination correction {sup 234}U/{sup 238}U activity ratios in the range 1.143--1.154 are observed for 13 seawater and contemporary corals, in agreement with the established marine {sup 234}U/{sup 238}U activity ratio. For samples sizes of 5--25 {micro}g U, ICPMS uncertainties of {+-} 0.2--0.5% relative, 2{theta} standard error, approach those obtained for < 0.1 {micro}g U by thermal ionization mass spectrometry. Measurements of {sup 234}U/{sup 238}U activity ratios in bottled waters, Lake Erie surface waters, mollusk fossils, and fertilizers are also demonstrated.« less

  10. 43 CFR 23.4 - Application for permission to conduct exploration operations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Application for permission to conduct... SURFACE EXPLORATION, MINING AND RECLAMATION OF LANDS § 23.4 Application for permission to conduct... disposition under the mineral leasing acts without first filing an application for, and obtaining, a permit...

  11. 23.4% saline decreases brain tissue volume in severe hepatic encephalopathy as assessed by a quantitative computed tomography marker

    PubMed Central

    Liotta, Eric M; Lizza, Bryan D; Romanova, Anna L; Guth, James C; Berman, Michael D; Carroll, Timothy J; Francis, Brandon; Ganger, Daniel; Ladner, Daniela P; Maas, Matthew B; Naidech, Andrew M

    2016-01-01

    Objective Cerebral edema is common in severe hepatic encephalopathy and may be life-threatening. Bolus 23.4% hypertonic saline (HTS) improves surveillance neuromonitoring scores, although its mechanism of action is not clearly established. We investigated the hypothesis that bolus HTS decreases cerebral edema in severe hepatic encephalopathy utilizing a quantitative technique to measure brain and CSF volume changes. Design Retrospective analysis of serial computed tomography (CT) scans and clinical data for a case-control series was performed. Setting Intensive care units of a tertiary care hospital. Patients Patients with severe hepatic encephalopathy treated with 23.4% HTS and control patients who did not receive 23.4% HTS. Methods We used clinically obtained CT scans to measure volumes of the ventricles, intracranial CSF, and brain using a previously validated semi-automated technique (Analyze Direct; Overland Park, KS). Volumes before and after 23.4% HTS were compared with Wilcoxon signed-rank test. Associations between total CSF volume, ventricular volume, serum sodium, and Glasgow Coma Scale Scores were assessed using Spearman correlation. Results Eleven patients with 18 administrations of 23.4% HTS met inclusion criteria. Total CSF (median 47.6 [35.1–69.4] to 61.9 [47.7–87.0] mL, p<0.001) and ventricular volumes (median 8.0 [6.9–9.5] to 9.2 [7.8–11.9] mL, p=0.002) increased and Glasgow Coma Scale Scores improved (median 4 [3–6] to 7 [6–9], p=0.008) after 23.4% HTS. In contrast, total CSF and ventricular volumes decreased in untreated control patients. Serum sodium increase was associated with increase in total CSF volume (r=0.83, p<0.001) and change in total CSF volume was associated with ventricular volume change (r=0.86, p<0.001). Conclusions Total CSF and ventricular volumes increased after 23.4% HTS, consistent with a reduction in brain tissue volume. Total CSF and ventricular volume change may be useful quantitative measures to assess

  12. 49 CFR 234.11 - State highway-rail grade crossing action plans.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false State highway-rail grade crossing action plans..., STATE ACTION PLANS, AND EMERGENCY NOTIFICATION SYSTEMS Reports and Plans § 234.11 State highway-rail grade crossing action plans. (a) Purpose. The purpose of this section is to reduce collisions at highway...

  13. 49 CFR 234.11 - State highway-rail grade crossing action plans.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false State highway-rail grade crossing action plans..., STATE ACTION PLANS, AND EMERGENCY NOTIFICATION SYSTEMS Reports and Plans § 234.11 State highway-rail grade crossing action plans. (a) Purpose. The purpose of this section is to reduce collisions at highway...

  14. 49 CFR 234.11 - State highway-rail grade crossing action plans.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false State highway-rail grade crossing action plans..., STATE ACTION PLANS, AND EMERGENCY NOTIFICATION SYSTEMS Reports and Plans § 234.11 State highway-rail grade crossing action plans. (a) Purpose. The purpose of this section is to reduce collisions at highway...

  15. 18 CFR 367.2340 - Account 234, Accounts payable to associate companies.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... POWER ACT AND NATURAL GAS ACT Balance Sheet Chart of Accounts Current and Accrued Liabilities § 367.2340... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Account 234, Accounts payable to associate companies. 367.2340 Section 367.2340 Conservation of Power and Water Resources...

  16. 49 CFR 234.11 - State highway-rail grade crossing action plans.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false State highway-rail grade crossing action plans... PLANS Reports and Plans § 234.11 State highway-rail grade crossing action plans. (a) Purpose. The purpose of this section is to reduce collisions at highway-rail grade crossings in the ten States that...

  17. 49 CFR 234.11 - State highway-rail grade crossing action plans.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false State highway-rail grade crossing action plans... PLANS Reports and Plans § 234.11 State highway-rail grade crossing action plans. (a) Purpose. The purpose of this section is to reduce collisions at highway-rail grade crossings in the ten States that...

  18. Role of colloidal material in the removal of 234Th in the Canada basin of the Arctic Ocean

    USGS Publications Warehouse

    Baskaran, M.; Swarzenski, P.W.; Porcelli, D.

    2003-01-01

    The phase partitioning of 234Th between dissolved ( 200m, general equilibrium existed between total 234Th and 238U. The inventory of SPM and the specific activity of particulate 234Th in the Canada Basin was about an order of magnitude higher than the profile reported for the Alpha Ridge ice camp station. This higher concentration of SPM in the southwestern Canada Basin is likely derived from ice-rafted sedimentary particles. Inventories of nutrients, and dissolved organic carbon and nitrogen in the upper 100 m of the Canada Basin are comparable to the other estimates for the central Arctic Ocean. Comparison of the mass concentrations of colloidal and filter-retained particulate matter as well as the activity of 234Th in these phases indicates that only a very small component of the colloidal material is actively involved in Th scavenging. Lower values of the conditional partition coefficient between the colloidal and dissolved phase indicate that the Arctic colloids are less reactive than colloidal material from other regions. The conditional partition coefficient between the filter-retained and dissolved phases (Kf) is generally higher than that for other regions, which is attributed to the higher complexation capacity of glacio-marine sedimentary particles in these waters. The 234Th-derived export of POC for the shelf and deep Canada Basin ranges between 5.6 and 6.5 mmol m-2 d-1, and is in agreement with other estimates reported for the central Arctic Ocean and Beaufort Sea. ?? 2003 Elsevier Ltd. All rights reserved.

  19. Temporal Variations in 234U/238U Activity Ratios in Four Mississippi River Tributaries

    NASA Astrophysics Data System (ADS)

    Grzymko, T. J.; Marcantonio, F.

    2005-05-01

    In 2004 we sampled the four tributaries that are the major contributors to the Mississippi River in terms of water discharge, i.e., the Arkansas, Missouri, Upper Mississippi, and Ohio rivers. Each river was sampled four times over the course of the year at variable levels of discharge in an attempt to constrain the causes of the temporal variations of 234U/238U activity ratios in the lower Mississippi River at New Orleans. The tributary uranium data support the idea that lower river uranium isotope and elemental systematics are controlled by a simple mass balance of the source tributary discharges. Furthermore, the uranium isotope ratios of the individual tributaries show coherent patterns of variability. Specifically, the data obtained from the four sampling trips yielded similar patterns of temporal variation in the 234U/238U activity ratios of all of the rivers, although the absolute values of these ratios were distinctly different from one river to the next. The pattern was such that the highest 234U/238U activity ratios were observed during the highest flow associated with the spring freshet while the lowest ratios occurred during the summer. For example, in the Missouri River, the 234U/238U activity ratios varied from 1.51 (February 12) to 1.37 (April 14) to 1.34 (July 16) to 1.37 (November 12), while in the Ohio River the same ratios varied from 1.36 (February 12) to 1.29 (April 14) to 1.21 (July 16) to 1.23 (November 12). The apparent seasonal pattern of these ratios in each tributary has led to several ideas as to the causes of the observed trends. The first, and most obvious, is that in each individual drainage basin there are various source tributaries that contribute to the uranium isotope systematics of the main stem of the tributary of interest. It follows that the variations in the uranium activity ratios may be caused by spatial variations in the source rock chemistry of the drainage basin. Other more complex scenarios can also be envisioned and

  20. 49 CFR 234.247 - Purpose of inspections and tests; removal from service of relay or device failing to meet test...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Purpose of inspections and tests; removal from service of relay or device failing to meet test requirements. 234.247 Section 234.247 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING...

  1. 49 CFR 234.247 - Purpose of inspections and tests; removal from service of relay or device failing to meet test...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Purpose of inspections and tests; removal from service of relay or device failing to meet test requirements. 234.247 Section 234.247 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING...

  2. 49 CFR 234.247 - Purpose of inspections and tests; removal from service of relay or device failing to meet test...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Purpose of inspections and tests; removal from service of relay or device failing to meet test requirements. 234.247 Section 234.247 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM...

  3. 49 CFR 234.247 - Purpose of inspections and tests; removal from service of relay or device failing to meet test...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Purpose of inspections and tests; removal from service of relay or device failing to meet test requirements. 234.247 Section 234.247 Transportation Other Regulations Relating to Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING...

  4. Late summer carbon export and remineralisation in the Southern Ocean determined with the combined 234Th and particulate biogenic Ba tracers

    NASA Astrophysics Data System (ADS)

    Planchon, F.; Cavagna, A.-J.; Cardinal, D.; André, L.; Dehairs, F.

    2012-04-01

    As part of the Bonus-GoodHope expedition (late summer 2008; Feb-March) in the Atlantic sector of the Southern Ocean, we present combined 234Th and biogenic particulate barium (Baxs) results. These data are used to estimate the export of particulate organic carbon (POC) from the upper mixed layer and the impact of twilight zone remineralisation on the carbon export. Total 234Th activity in surface waters is depleted relative to its parent nuclide 238U (234Th/238U ratio ranging from 0.74 to 0.91), while equilibrium is reached at the base of the surface mixed-layer. The export fluxes of 234Th from the 100m horizon, as estimated using steady state (SS) and non steady state (NSS) models, reveal different latitudinal trends. SS 234Th export varies from 496 dpm m-2 d-1 in the subtropical domain of the Cape Basin to 1195 dpm m-2 d-1 close to the Polar Front (PF). NSS export representative for a 15 to 22 day period preceding the cruise, is consistently less than SS export in the sub-Antarctic Zone (SAZ, 150 dpm m-2 d-1) and the Polar Frontal Zone (PFZ, 440 dpm m-2 d-1) but is similar further south in the Antarctic Zone (AZ, 1217 dpm m-2 d-1) and the northern Weddell Gyre (N-WG; 757 dpm m-2 d-1). This reflects temporal variability of export north of the PF, while south of the PF the export system appears to be in steady state during this late summer situation. The POC:Th ratio of large (>53 µm) particles collected below the surface mixed layer increases from 1.7 µmol dpm-1 in the STZ to a maximum of 4.8 µmol dpm-1 at the Southern Antarctic Circumpolar Current Front (SACCF), suggesting a southward increase of the contribution of larger cells, such as diatoms, to sinking material. Using these POC:Th ratios we calculate that the POC SS export from the 100m horizon reaches 0.9-1.7 mmol m-2 d-1 in the STZ and the SAZ, 2.6-4.7 mmol m-2 d-1 in the PFZ, and 3.3 mmol m-2 d-1 in the N-WG. Below the export layer, in the mesopelagic zone (100-600 m), 234Th activities generally reach

  5. Cyclic-β-glucans of Rhizobium (Sinorhizobium) sp. strain NGR234 are required for hypo-osmotic adaptation, motility, and efficient symbiosis with host plants.

    PubMed

    Gay-Fraret, Jérémie; Ardissone, Silvia; Kambara, Kumiko; Broughton, William J; Deakin, William J; Le Quéré, Antoine

    2012-08-01

    Cyclic-β-glucans (CβG) consist of cyclic homo-polymers of glucose that are present in the periplasmic space of many Gram-negative bacteria. A number of studies have demonstrated their importance for bacterial infection of plant and animal cells. In this study, a mutant of Rhizobium (Sinorhizobium) sp. strain NGR234 (NGR234) was generated in the cyclic glucan synthase (ndvB)-encoding gene. The great majority of CβG produced by wild-type NGR234 are negatively charged and substituted. The ndvB mutation abolished CβG biosynthesis. We found that, in NGR234, a functional ndvB gene is essential for hypo-osmotic adaptation and swimming, attachment to the roots, and efficient infection of Vigna unguiculata and Leucaena leucocephala. © 2012 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.

  6. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Eppich, Gary R.; Williams, Ross W.; Gaffney, Amy M.

    Here, age dating of nuclear material can provide insight into source and suspected use in nuclear forensic investigations. We report here a method for the determination of the date of most recent chemical purification for uranium materials using the 235U- 231Pa chronometer. Protactinium is separated from uranium and neptunium matrices using anion exchange resin, followed by sorption of Pa to an SiO 2 medium. The concentration of 231Pa is measured by isotope dilution mass spectrometry using 233Pa spikes prepared from an aliquot of 237Np and calibrated in-house using the rock standard Table Mountain Latite and the uranium isotopic standard U100.more » Combined uncertainties of age dates using this method are 1.5 to 3.5 %, an improvement over alpha spectrometry measurement methods. Model ages of five uranium standard reference materials are presented; all standards have concordant 235U- 231Pa and 234U- 230Th model ages.« less

  7. Noise measurement flight test Boeing Vertol 234/CH47-D helicopter : data and analyses

    DOT National Transportation Integrated Search

    1984-09-30

    This report is the seventh in a series of seven documenting the FAA helicopter noise measurement program conducted at Dulles International Airport during the summer of 1983. The BV234/CH-47D test program involved the acquisition of detailed acoustica...

  8. Particle Scavenging and Tidal Exchange of Po-210 and Th-234 in a Mesotidal Embayment in Southern California

    NASA Astrophysics Data System (ADS)

    Peng, J.; Ku, T.; Luo, S.

    2002-12-01

    San Diego Bay (SDB) is a semi-closed shallow embayment that sustains semidiurnal tides and continuous tidal flows. We measured Po-210 and Th-234 activities in water samples collected from across north SDB, coastal waters immediately outside SDB, and from several rivers in the vicinity of SDB. A station in north SDB was sampled multiple times during a complete flooding-ebbing cycle. The major findings are as follows. 1) Compared to the outer sea, SDB water has much higher Th-234 deficiency (1.3-2.0 dpm/l, vs. 0.4-0.8dpm/l for outer sea) and considerably lower Po-210 activities (averaging 0.05dpm/l vs. 0.07dpm/l for outer sea) due to stronger particle scavenging. There is higher particulate Po-210 vs. total Po-210 ratio in SDB water (68%, vs. 34% for outer sea). 2) Inside SDB, an increasing Po-210 activities towards the bay mouth clearly indicates the effect of tidal exchange. Po-210 activity near the Bay mouth exceeds that of the outer sea due to higher particulate Po-210, which may come from tidal-induced sediment resuspension. 3) Rivers flowing into or near SDB have 8-12 times higher Po-210 activities than the bay water. But the input of Po-210 to SDB from rivers should be insignificant because of the negligible flow in the dry season. 4) In a tidal cycle, both Po-210 and Th-234 activities in North Bay covary with tidal pattern, which can be readily explained by the exchange between two waters inside and outside SDB with distinct TSS levels and Po-210/Th-234 activities. Sediment resuspension plays an important role during the peak tidal flow, resulting in an asymmetrical time-evolution curve of Po-210/Th-234 activities. These observations correspond well with our previous finding of systematic variations of Po-210 and Th-234 activities in water and sediment columns across SDB. This study manifests the significance of hydrodynamic processes such as advection, mixing and particle movement in the study of geochemistry of particle-reactive radionuclides in a tidal

  9. The Rhizobium sp. strain NGR234 systemically suppresses arbuscular mycorrhizal root colonization in a split-root system of barley (Hordeum vulgare).

    PubMed

    Khaosaad, Thanasan; Staehelin, Christian; Steinkellner, Siegrid; Hage-Ahmed, Karin; Ocampo, Juan Antonio; Garcia-Garrido, Jose Manuel; Vierheilig, Horst

    2010-11-01

    Nitrogen-fixing bacteria (rhizobia) form a nodule symbiosis with legumes, but also induce certain effects on non-host plants. Here, we used a split-root system of barley to examine whether inoculation with Rhizobium sp. strain NGR234 on one side of a split-root system systemically affects arbuscular mycorrhizal (AM) root colonization on the other side. Mutant strains of NGR234 deficient in Nod factor production (strain NGRΔnodABC), perception of flavonoids (strain NGRΔnodD1) and secretion of type 3 effector proteins (strain NGRΩrhcN) were included in this study. Inoculation resulted in a systemic reduction of AM root colonization with all tested strains. However, the suppressive effect of strain NGRΩrhcN was less pronounced. Moreover, levels of salicylic acid, an endogenous molecule related to plant defense, were increased in roots challenged with rhizobia. These data indicate that barley roots perceived NGR234 and that a systemic regulatory mechanism of AM root colonization was activated. The suppressive effect appears to be Nod factor independent, but enhanced by type 3 effector proteins of NGR234. Copyright © Physiologia Plantarum 2010.

  10. Uncovering malpractice in appendectomies: a review of 234 cases.

    PubMed

    Choudhry, Amad J; Anandalwar, Seema P; Choudhry, Asad J; Svider, Peter F; Oliver, Joseph O; Eloy, Jean Anderson; Chokshi, Ravi J

    2013-10-01

    General surgery is a "high-risk specialty" with respect to medical malpractice rates, and appendicitis is one of the most common diagnoses encountered by practitioners. Our objectives were to detail issues affecting malpractice litigation regarding appendicitis and appendectomies, including outcomes, awards, alleged causes of malpractice, and other factors instrumental in determining legal responsibility and increasing patient safety. Publically available federal and state court records were examined for pertinent jury verdict and settlement reports. Information from 234 pertinent cases was collected, including alleged causes of malpractice and outcomes. Of the 234 cases included in this study, the most common factor noted was an alleged delay in diagnosis (67.1%), followed by intraoperative negligence (16.2%). Alleged deficits in informed consent, although only specifically cited as a cause of malpractice in 1.3% of cases, were found to be an important aspect of many cases. In total, 59.8% of cases were ruled in favor of the physician, 23.7% in favor of the plaintiff, and 5.5% reached a settlement. The average plaintiff award was US $794,152, and the average settlement award was US $1,434,286. An important strategy to decrease liability in a physician's practice is prompt evaluation of an appendicitis patient. An integral part of this is efficient communication between physicians practicing a wide variety of specialties, especially including practitioners in emergency medicine and general surgery. Additionally, completing a thorough informed consent explaining all aspects of the procedure including the factors we outline will not only increase patient awareness of potential risks but also protect the physician in the face of litigation.

  11. Application of the 226Ra– 230Th– 234U and 227Ac– 231Pa– 235U radiochronometers to uranium certified reference materials

    DOE PAGES

    Rolison, John M.; Treinen, Kerri C.; McHugh, Kelly C.; ...

    2017-11-06

    Uranium certified reference materials (CRM) issued by New Brunswick Laboratory were subjected to dating using four independent uranium-series radiochronometers. In all cases, there was acceptable agreement between the model ages calculated using the 231Pa– 235U, 230Th– 234U, 227Ac– 235U or 226Ra– 234U radiochronometers and either the certified 230Th– 234U model date (CRM 125-A and CRM U630), or the known purification date (CRM U050 and CRM U100). Finally, the agreement between the four independent radiochronometers establishes these uranium certified reference materials as ideal informal standards for validating dating techniques utilized in nuclear forensic investigations in the absence of standards with certifiedmore » model ages for multiple radiochronometers.« less

  12. Application of the 226Ra– 230Th– 234U and 227Ac– 231Pa– 235U radiochronometers to uranium certified reference materials

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Rolison, John M.; Treinen, Kerri C.; McHugh, Kelly C.

    Uranium certified reference materials (CRM) issued by New Brunswick Laboratory were subjected to dating using four independent uranium-series radiochronometers. In all cases, there was acceptable agreement between the model ages calculated using the 231Pa– 235U, 230Th– 234U, 227Ac– 235U or 226Ra– 234U radiochronometers and either the certified 230Th– 234U model date (CRM 125-A and CRM U630), or the known purification date (CRM U050 and CRM U100). Finally, the agreement between the four independent radiochronometers establishes these uranium certified reference materials as ideal informal standards for validating dating techniques utilized in nuclear forensic investigations in the absence of standards with certifiedmore » model ages for multiple radiochronometers.« less

  13. Characterization of Nops, nodulation outer proteins, secreted via the type III secretion system of NGR234.

    PubMed

    Marie, Corinne; Deakin, William J; Viprey, Virginie; Kopciñska, Joanna; Golinowski, Wladyslaw; Krishnan, Hari B; Perret, Xavier; Broughton, William J

    2003-09-01

    The nitrogen-fixing symbiotic bacterium Rhizobium species NGR234 secretes, via a type III secretion system (TTSS), proteins called Nops (nodulation outer proteins). Abolition of TTSS-dependent protein secretion has either no effect or leads to a change in the number of nodules on selected plants. More dramatically, Nops impair nodule development on Crotalaria juncea roots, resulting in the formation of nonfixing pseudonodules. A double mutation of nopX and nopL, which code for two previously identified secreted proteins, leads to a phenotype on Pachyrhizus tuberosus differing from that of a mutant in which the TTSS is not functional. Use of antibodies and a modification of the purification protocol revealed that NGR234 secretes additional proteins in a TTSS-dependent manner. One of them was identified as NopA, a small 7-kDa protein. Single mutations in nopX and nopL were also generated to assess the involvement of each Nop in protein secretion and nodule formation. Mutation of nopX had little effect on NopL and NopA secretion but greatly affected the interaction of NGR234 with many plant hosts tested. NopL was not necessary for the secretion of any Nops but was required for efficient nodulation of some plant species. NopL may thus act as an effector protein whose recognition is dependent upon the hosts' genetic background.

  14. RECOVERY OF URANIUM BY SECONDARY XANTHATE COMPLEXING

    DOEpatents

    Neville, O.K.

    1959-09-01

    A method is described for separating and recovering uranium values contained in an acidic aqueous solution together with thorium or protactinium values. In accordance with the invention, the acidic solution containing uranium in the uranyl form is contacted with an organic xanthate. The xanthate forms a urano-xanthate complex but is substantially non-reactive with thorium and protactinium. The urano-xanthate complex is recovered by organic solvent extraction.

  15. 234Th, 210Pb, 210Po and stable Pb in the central equatorial Pacific: Tracers for particle cycling

    USGS Publications Warehouse

    Murray, J.W.; Paul, B.; Dunne, J.P.; Chapin, T.

    2005-01-01

    Samples were collected during the 1992 US JGOFS EqPac Survey I and II cruises from 12??N to 12??S at 140??W in the central equatorial Pacific for water column profiles of dissolved, particulate and total 234Th, 210Pb and 210Po and total acid soluble stable Pb and sediment trap fluxes of 234Th, 210Pb and 210Po. Survey I occurred in February/March with moderate El Nino conditions while Survey II was conducted in September/October when there was a well developed cold-tongue. 234Th, 210Pb and 210Po are all particle reactive yet they partition differently between dissolved and particulate phases. Fractionation factors (the ratios of the distribution coefficients) show that the selectivity for suspended and sediment trap particles follows Th>Po>Pb. Scavenging residence times (??) for 234Th, 210Pb and 210Po ranged from 25 to 100 d, 3 to 8 years and 100 to 500 d, respectively. These particle reactive tracers have very different distributions in the water column, which reflect differences in their sources and sinks. The deficiency of 234Th relative to 238U was fairly uniformly distributed meridionally, though deficiencies were higher during Survey II when there was higher new production. Excess 210Pb relative to 226Ra was very asymmetrical with much higher excess values north of the equator. The distributions were similar for Surveys I and II. The deficiency of 210Po relative to 210Pb had a symmetrical distribution about the equator for both Survey I and II but the deficiencies were larger during Survey I when upwelling was smaller. Stable Pb was generally higher at the surface than at 250 m and there was no meridional trend from 12??N to 12??S. A mass balance for 210Pb was used to determine the atmospheric input of 210Pb. The average values for Surveys I and II were 0.12 and 0.32 dpm cm-2 year-1, respectively. There was no general increase in atmospheric input of 210Pb north of the equator but there was a strong maximum at 2-3??N during Survey I coincident with the

  16. 238,234U contents on Lepomis Cyanellus from San Marcos dam located in a uraniferous area

    NASA Astrophysics Data System (ADS)

    Lares, Magaly Cabral; Luna-Porres, Mayra Y.; Montero-Cabrera, María E.; Renteria-Villalobos, Marusia

    2014-07-01

    Fish species are suitable biomonitors of radioisotopes in aquatic systems. In the present study, it was made the determination of uranium isotopic contents on fish fillet (Lepomis Cyanellus) from San Marcos dam which is located in uranium mineralized zone. Uranium activity concentrations (AC) in fish samples were obtained on wet weight (ww), using liquid scintillation. 238U and 234U AC in fish fillet ranged from 0.0004 to 0.0167 Bq kg-1, and from 0.0013 to 0.0394 Bq kg-1, respectively. The activity ratio (234U/overflow="scroll">238U) in fish fillet ranged from 2.2 to 8.8. Lepomis cyanellus from San Marcos dam shows bioaccumulation factor (FB) of 0.6 L kg-1. The results suggest that the Lepomis Cyanellus in environments with high U contents tends to have a greater bioaccumulation compared to others.

  17. High-Resolution Inductively Coupled Plasma Optical Emission Spectrometry for (234)U/(238)Pu Age Dating of Plutonium Materials and Comparison to Sector Field Inductively Coupled Plasma Mass Spectrometry.

    PubMed

    Krachler, Michael; Alvarez-Sarandes, Rafael; Rasmussen, Gert

    2016-09-06

    Employing a commercial high-resolution inductively coupled plasma optical emission spectrometry (HR-ICP-OES) instrument, an innovative analytical procedure for the accurate determination of the production age of various Pu materials (Pu powder, cardiac pacemaker battery, (242)Cm heat source, etc.) was developed and validated. This undertaking was based on the fact that the α decay of (238)Pu present in the investigated samples produced (234)U and both mother and daughter could be identified unequivocally using HR-ICP-OES. Benefiting from the high spectral resolution of the instrument (<5 pm) and the isotope shift of the emission lines of both nuclides, (234)U and (238)Pu were selectively and directly determined in the dissolved samples, i.e., without a chemical separation of the two analytes from each other. Exact emission wavelengths as well as emission spectra of (234)U centered around λ = 411.590 nm and λ = 424.408 nm are reported here for the first time. Emission spectra of the isotopic standard reference material IRMM-199, comprising about one-third each of (233)U, (235)U, and (238)U, confirmed the presence of (234)U in the investigated samples. For the assessment of the (234)U/(238)Pu amount ratio, the emission signals of (234)U and (238)Pu were quantified at λ = 424.408 nm and λ = 402.148 nm, respectively. The age of the investigated samples (range: 26.7-44.4 years) was subsequently calculated using the (234)U/(238)Pu chronometer. HR-ICP-OES results were crossed-validated through sector field inductively coupled plasma mass spectrometry (SF-ICPMS) analysis of the (234)U/(238)Pu amount ratio of all samples applying isotope dilution combined with chromatographic separation of U and Pu. Available information on the assumed ages of the analyzed samples was consistent with the ages obtained via the HR-ICP-OES approach. Being based on a different physical detection principle, HR-ICP-OES provides an alternative strategy to the well-established mass

  18. 49 CFR 234.307 - Use of third-party telephone service by dispatching and maintaining railroads.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Systems for Telephonic Reporting of Unsafe Conditions at Highway-Rail and Pathway Grade Crossings § 234...-party telephone service to receive reports of unsafe conditions at highway-rail and pathway grade... railroad that either maintains a highway-rail or pathway grade crossing on a seasonal or intermittent basis...

  19. 49 CFR 234.307 - Use of third-party telephone service by dispatching and maintaining railroads.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Systems for Telephonic Reporting of Unsafe Conditions at Highway-Rail and Pathway Grade Crossings § 234...-party telephone service to receive reports of unsafe conditions at highway-rail and pathway grade... railroad that either maintains a highway-rail or pathway grade crossing on a seasonal or intermittent basis...

  20. 49 CFR 234.307 - Use of third-party telephone service by dispatching and maintaining railroads.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Systems for Telephonic Reporting of Unsafe Conditions at Highway-Rail and Pathway Grade Crossings § 234...-party telephone service to receive reports of unsafe conditions at highway-rail and pathway grade... railroad that either maintains a highway-rail or pathway grade crossing on a seasonal or intermittent basis...

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