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Sample records for californium 254

  1. Californium Electrodepositions at Oak Ridge National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Boll, Rose Ann [ORNL

    2015-01-01

    Electrodepositions of californium isotopes were successfully performed at Oak Ridge National Laboratory (ORNL) during the past year involving two different types of deposition solutions, ammonium acetate (NH4C2H3O2) and isobutanol ((CH3)2CHCH2OH). A californium product that was decay enriched in 251Cf was recovered for use in super-heavy element (SHE) research. This neutron-rich isotope, 251Cf, provides target material for SHE research for the potential discovery of heavier isotopes of Z=118. The californium material was recovered from aged 252Cf neutron sources in storage at ORNL. These sources have decayed for over 30 years, thus providing material with a very high 251Cf-to-252Cf ratio. After the source capsules were opened, the californium was purified and then electrodeposited using the isobutanol method onto thin titanium foils for use in an accelerator at the Joint Institute for Nuclear Research in Dubna, Russia. Another deposition method, ammonium acetate, was used to produce a deposition containing 1.7 0.1 Ci of 252Cf onto a stainless steel substrate. This was the largest single electrodeposition of 252Cf ever prepared. The 252Cf material was initially purified using traditional ion exchange media, such as AG50-AHIB and AG50-HCl, and further purified using a TEVA-NH4SCN system to remove any lanthanides, resulting in the recovery of 3.6 0.1 mg of purified 252Cf. The ammonium acetate deposition was run with a current of 1.0 amp, resulting in a 91.5% deposition yield. Purification and handling of the highly radioactive californium material created additional challenges in the production of these sources.

  2. Historical Review of Californium-252 Discovery and Development

    Science.gov (United States)

    Stoddard, D. H.

    1985-01-01

    This paper discusses the discovery and history of californium 252. This isotope may be synthesized by irradiating plutonium 239, plutonium 242, americium 243, or curium 244 with neutrons in a nuclear reactor. Various experiments and inventions involving Cf conducted at the Savannah River Plant are discussed. The evolution of radiotherapy using californium 252 is reviewed. (PLG)

  3. Production, Distribution, and Applications of Californium-252 Neutron Sources

    Energy Technology Data Exchange (ETDEWEB)

    Balo, P.A.; Knauer, J.B.; Martin, R.C.

    1999-10-03

    The radioisotope {sup 252}Cf is routinely encapsulated into compact, portable, intense neutron sources with a 2.6-year half-life. A source the size of a person's little finger can emit up to 10{sup 11} neutrons/s. Californium-252 is used commercially as a reliable, cost-effective neutron source for prompt gamma neutron activation analysis (PGNAA) of coal, cement, and minerals, as well as for detection and identification of explosives, laud mines, and unexploded military ordnance. Other uses are neutron radiography, nuclear waste assays, reactor start-up sources, calibration standards, and cancer therapy. The inherent safety of source encapsulations is demonstrated by 30 years of experience and by U.S. Bureau of Mines tests of source survivability during explosions. The production and distribution center for the U. S Department of Energy (DOE) Californium Program is the Radiochemical Engineering Development Center (REDC) at Oak Ridge National Laboratory (ORNL). DOE sells The radioisotope {sup 252}Cf is routinely encapsulated into compact, portable, intense neutron sources with a 2.6- year half-life. A source the size of a person's little finger can emit up to 10 neutrons/s. Californium-252 is used commercially as a reliable, cost-effective neutron source for prompt gamma neutron activation analysis (PGNAA) of coal, cement, and minerals, as well as for detection and identification of explosives, laud mines, and unexploded military ordnance. Other uses are neutron radiography, nuclear waste assays, reactor start-up sources, calibration standards, and cancer therapy. The inherent safety of source encapsulations is demonstrated by 30 years of experience and by U.S. Bureau of Mines tests of source survivability during explosions. The production and distribution center for the U. S Department of Energy (DOE) Californium Program is the Radiochemical Engineering Development Center (REDC) at Oak Ridge National Laboratory(ORNL). DOE sells {sup 252}Cf to commercial

  4. 36 CFR 254.25 - Survey.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Survey. 254.25 Section 254.25... National Forest Townsites § 254.25 Survey. The authorized Forest Service official shall conduct or provide for the necessary tract survey and boundary posting of National Forest System land....

  5. Teratogenic effect of Californium-252 irradiation in rats

    Energy Technology Data Exchange (ETDEWEB)

    Satow, Yukio; Lee, Juing-Yi; Hori, Hiroshi; Okuda, Hiroe; Tsuchimoto, Shigeo; Sawada, Shozo; Yokoro, Kenjiro (Hiroshima Univ. (Japan). Research Inst. for Nuclear Medicine and Biology)

    1989-06-01

    The teratogenicity of Californium-252 (Cf-252) irradiation which generates approximately 70% 2.3 MeV fast neutron and 30% gamma rays was evaluated. A single whole body exposure of Cf-252 at various doses was given to pregnant rats on day 8 or 9 of pregnancy, followed by microscopic autopsy of the fetuses at the terminal stage of pregnancy to search for external and internal malformations. For comparison, pregnant rats were irradiated with various doses of Cobalt-60 (Co-60) standard gamma rays at the same dose rate (1 rad/min.). The doses were 20-120 rad of Cf-252 and 80-220 rad of Co-60. Using frequency of radiation induced malformations observed on day 8 of pregnancy as an index, relative biological effectiveness (RBE) of 2.3-2.7 was obtained from the straight line obtained by modifying by the least squares method the frequency curves of malformed fetuses in total implants and in surviving fetuses. The types of malformations induced by Cf-252 and Co-60 irradiation were alike. Using fetal LD/sub 50/ as an index, 2.4 was obtained as RBE when irradiated on day 8 of pregnancy and 3.1 as that when irradiated on day 9. The results showed that Cf-252 had stronger a teratogenic effect than Co-60 gamma rays. (author).

  6. Dicty_cDB: SFJ254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available SF (Link to library) SFJ254 (Link to dictyBase) - - - Contig-U16458-1 SFJ254P (Link to Original site) SF...J254F 568 SFJ254Z 647 SFJ254P 1215 - - Show SFJ254 Library SF (Link to library) Clone ID SF...e URL http://dictycdb.biol.tsukuba.ac.jp/CSM/SF/SFJ2-C/SFJ254Q.Seq.d/ Representative seq. ID SF...J254P (Link to Original site) Representative DNA sequence >SFJ254 (SFJ254Q) /CSM/SF/SFJ2-C/SFJ...DHSKLTKADFLSKQDKKTPVFIRISTVQGPRGS ADTVRDVHGFAVKFYTDEGNYDLVGNNMPVFFIQDASSFPDFVHAVK

  7. 36 CFR 254.10 - Bargaining; arbitration.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Bargaining; arbitration. 254... LANDOWNERSHIP ADJUSTMENTS Land Exchanges § 254.10 Bargaining; arbitration. (a) Unless the parties to an exchange... exchange, the appraisal(s), at the initiative of either party, must be submitted to arbitration, unless,...

  8. 7 CFR 1944.254 - Program costs.

    Science.gov (United States)

    2010-01-01

    ... such as annual fiscal review and audit, telephones, postage, travel, professional education, furniture... 7 Agriculture 13 2010-01-01 2009-01-01 true Program costs. 1944.254 Section 1944.254 Agriculture Regulations of the Department of Agriculture (Continued) RURAL HOUSING SERVICE, RURAL...

  9. 36 CFR 254.15 - Title standards.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Title standards. 254.15... ADJUSTMENTS Land Exchanges § 254.15 Title standards. (a) Title evidence. (1) Unless otherwise specified by the... and “Standards for the Preparation of Title Evidence in Land Acquisitions by the United States”...

  10. 48 CFR 53.303-DD-254 - Department of Defense DD Form 254, Contract Security Classification Specification.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Department of Defense DD Form 254, Contract Security Classification Specification. 53.303-DD-254 Section 53.303-DD-254 Federal... Illustrations of Forms 53.303-DD-254 Department of Defense DD Form 254, Contract Security...

  11. Apparatus for the measurement of total body nitrogen using prompt neutron activation analysis with californium-252.

    Science.gov (United States)

    Mackie, A; Hannan, W J; Smith, M A; Tothill, P

    1988-01-01

    Details of clinical apparatus designed for the measurement of total body nitrogen (as an indicator of body protein), suitable for the critically ill, intensive-care patient are presented. Californium-252 radio-isotopic neutron sources are used, enabling a nitrogen measurement by prompt neutron activation analysis to be made in 40 min with a precision of +/- 3.2% for a whole body dose equivalent of 0.145 mSv. The advantages of Californium-252 over alternative neutron sources are discussed. A comparison between two irradiation/detection geometries is made, leading to an explanation of the geometry adopted for the apparatus. The choice of construction and shielding materials to reduce the count rate at the detectors and consequently to reduce the pile-up contribution to the nitrogen background is discussed. Salient features of the gamma ray spectroscopy system to reduce spectral distortion from pulse pile-up are presented.

  12. 38 CFR 21.254 - Supportive services.

    Science.gov (United States)

    2010-07-01

    ...) VOCATIONAL REHABILITATION AND EDUCATION Vocational Rehabilitation and Employment Under 38 U.S.C. Chapter 31 Employment Services § 21.254 Supportive services. (a) General. Supportive services which may be provided during a period or program of employment services include a broad range of medical treatment, care...

  13. Spontaneous Partitioning of Californium from Curium: Curious Cases from the Crystallization of Curium Coordination Complexes

    Energy Technology Data Exchange (ETDEWEB)

    Cary, Samantha K.; Silver, Mark A.; Liu, Guokui; Wang, Jamie C.; Bogart, Justin A.; Stritzinger, Jared T.; Arico, Alexandra A.; Hanson, Kenneth; Schelter, Eric J.; Albrecht-Schmitt, Thomas E.

    2015-12-07

    The reaction of 248CmCl3 with excess 2,6-pyridinedicarboxylic acid (DPA) under mild solvothermal conditions results in crystallization of the tris-chelate complex Cm(HDPA)3·H2O. Approximately half of the curium remains in solution at the end of this process, and evaporation of the mother liquor results in crystallization of the bis-chelate complex [Cm(HDPA)- (H2DPA)(H2O)2Cl]Cl·2H2O. 248Cm is the daughter of the α decay of 252Cf and is extracted in high purity from this parent. However, trace amounts of 249,250,251Cf are still present in all samples of 248Cm. During the crystallization of Cm(HDPA)3·H2O and [Cm(HDPA)(H2DPA)(H2O)2Cl]Cl·2H2O, californium(III) spontaneously separates itself from the curium complexes and is found doped within crystals of DPA in the form of Cf(HDPA)3. These results add to the growing body of evidence that the chemistry of californium is fundamentally different from that of earlier actinides.

  14. A multidetector scintillation camera with 254 channels

    DEFF Research Database (Denmark)

    Sveinsdottir, E; Larsen, B; Rommer, P

    1977-01-01

    A computer-based scintillation camera has been designed for both dynamic and static radionuclide studies. The detecting head has 254 independent sodium iodide crystals, each with a photomultiplier and amplifier. In dynamic measurements simultaneous events can be recorded, and 1 million total counts...... per second can be accommodated with less than 0.5% loss in any one channel. This corresponds to a calculated deadtime of 5 nsec. The multidetector camera is being used for 133Xe dynamic studies of regional cerebral blood flow in man and for 99mTc and 197 Hg static imaging of the brain....

  15. 36 CFR 254.34 - Mineral survey fractions.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Mineral survey fractions. 254... LANDOWNERSHIP ADJUSTMENTS Conveyance of Small Tracts § 254.34 Mineral survey fractions. (a) Mineral survey fractions subject to conveyance under this subpart are limited to those tracts which: (1) Cannot...

  16. Clinical Report on Californium-252 Neutron Intraluminal Brachytherapy Combined with External Irradiation for Cervical Carcinoma Treatment

    Institute of Scientific and Technical Information of China (English)

    Huanyu Zhao; Keming Wang; Jian Sun; Xin Geng; Weiming Zhang

    2006-01-01

    OBJECTIVE To observe the curative effects and complications of californium-252 (252Cf) neutron intraluminal brachytherapy (IBT) combined with external irradiation (El) for treatment of cervical carcinoma.METHODS From December 2000 to December 2004, 128 cases of cervical carcinoma staged into ⅡA~ⅢB according to the International Federation of Gynecology and Obstetrics (FIGO) standards were treated with 252Cf neutron IBT using 8~10 Gy per fraction, once a week. The total dose at reference A point was 36~40 Gy in 4~5 fractions. From the second day after 252Cf neutron IBT treatment, the whole pelvic cavity was treated with 60Co γ-ray El, applying 2 Gy per fraction, 4 times per week. After 20~25 Gy of El, the center of the whole pelvic field was blocked with 4 cm of lead in width. The total dose of El was 45~50 Gy.RESULTS The short-term therapeutic effects were CR 95.3% and PR 4.7%. The 3 and 5-year local control rates were 93.5% and 87.9%. The overall 3-year survival rate was 87.5% and for Stages Ⅱ and Ⅲ , 90.9%and 81.5% respectively; the overall 5-year survival rate was 70% and for Stages Ⅱ and Ⅲ, 76.2% and 61% respectively. The rate of radiation complications was 4.7% for radiation cystitis, 7.8% for radiation proctitis, 6.3%for vagina contracture and adhesion and 5.5% for protracted radiation proctitis.CONCLUSION An combination of 252Cf neutron IBT with El for treatment of cervical carcinoma can be well-tolerated by cervical carcinoma patients. The rate of local tumor control is high and radiation complications are few.

  17. Application of TSH bioindicator for studying the biological efficiency of neutrons from californium-252 source

    Energy Technology Data Exchange (ETDEWEB)

    Cebulska-Wasilewska, A.; Rekas, K. [Institute of Nuclear Physics, Cracow (Poland); Kim, J.K. [Korea Atomic Energy Research Inst., Taejon (Korea, Republic of)

    1997-12-31

    The effectiveness of neutrons from a Californium-252 source in the induction of various abnormalities in the Tradescantia clone 4430 stamen hair cells (TSH-assay) was studied. The special attention was paid to check whether any enhancement in effects caused by process of boron neutron capture is visible in the cells enriched with boron ions. Two chemicals (borax and BSH) were applied to introduce boron-10 ions into cells. Inflorescence, normal or pretreated with chemicals containing boron, were irradiated in the air with neutrons from a Cf-252 source at KAERI, Taejon, Korea. To estimate the relative biological effectiveness (RBE) in the induction of gene mutations of the neutron beam under the study, Tradescantia inflorescences, without any chemical pretreatment, were irradiated with various doses of X-rays. The ranges of radiation doses used were 0-0.1 Gy in neutrons and 0-0.5 Gy in X-rays. After the time needed to complete the postirradiation repair Tradescantia cuttings were transferred to Cracow, where screening of gene and lethal; mutations, cell cycle alterations in somatic cells have been done, and dose response relationships were figured. The maximal RBE values were estimated in the range of 4.6-6.8. Alterations of RBE value were observed; from 6.8 to 7.8 in the case of plants pretreated with 240 ppm of B-10 from borax, and 4.6 to 6.1 in the case of 400 ppm of B-10 from BSH. Results showed a slight, although statistically insignificant increase in biological efficacy of radiation from the Cf-252 source in samples pretreated with boron containing chemicals. (author)

  18. Study of the shielding for spontaneous fission sources of Californium-252; Estudio de blindaje para fuentes de fision espontanea de Californio-252

    Energy Technology Data Exchange (ETDEWEB)

    Davila R, I

    1991-06-15

    A shielding study is made to attenuate, until maximum permissible levels, the neutrons radiation and photons emitted by spontaneous fission coming from a source of Californium-252. The compound package by a database (Library DLC-23) and the ANISNW code is used, in it version for personal computer. (Author)

  19. Susceptibility to Stress Corrosion Cracking of 254SMO SS

    Directory of Open Access Journals (Sweden)

    De Micheli Lorenzo

    2002-01-01

    Full Text Available The susceptibility to stress corrosion cracking (SCC of solubilized and sensitized 254SMO SS was studied in sodium chloride, and sodium fluoride solutions at 80 °C and sulfuric acid solutions in presence of sodium chloride at 25 °C. The influence of salt concentration, pH values and the addition of thiosulfate was examined. The susceptibility to SCC was evaluated by Slow Strain Rate Tests (SSRT, at 1.5 x 10-6 s-1 strain rate. The behavior of 254SMO was compared to those of AISI 316L SS and Hastelloy C276. 254SMO showed an excellent resistance to SCC in all conditions, except in the more acidic solutions (pH <= 1 where, in the sensitized conditions, intergranular stress corrosion cracking occurred.

  20. 40 CFR 264.254 - Monitoring and inspection.

    Science.gov (United States)

    2010-07-01

    ... liners and covers must be inspected to ensure tight seams and joints and the absence of tears, punctures, or blisters; and (2) Soil-based and admixed liners and covers must be inspected for imperfections... Waste Piles § 264.254 Monitoring and inspection. (a) During construction or installation, liners...

  1. 24 CFR 92.254 - Qualification as affordable housing: Homeownership.

    Science.gov (United States)

    2010-04-01

    ... Housing and Urban Development HOME INVESTMENT PARTNERSHIPS PROGRAM Project Requirements § 92.254... investment must be treated as an amendment to the original project. The housing must be sold to a new... applicable period specified in the following table, beginning after project completion. The per unit...

  2. 27 CFR 40.254 - Receipt into factory.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Receipt into factory. 40... Operations § 40.254 Receipt into factory. A manufacturer of tobacco products may receive in bond into his factory tobacco products and may also receive into his factory tobacco products on which the tax has...

  3. 7 CFR 1220.254 - Patents, copyrights, inventions, and publications.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 10 2010-01-01 2010-01-01 false Patents, copyrights, inventions, and publications... Miscellaneous § 1220.254 Patents, copyrights, inventions, and publications. (a) Any patents, copyrights..., franchising, or other uses of such patents, copyrights, inventions, or publications, inure to the benefit...

  4. 18 CFR 367.2540 - Account 254, Other regulatory liabilities.

    Science.gov (United States)

    2010-04-01

    ... GAS ACT Balance Sheet Chart of Accounts Deferred Credits § 367.2540 Account 254, Other regulatory... regulatory liabilities. 367.2540 Section 367.2540 Conservation of Power and Water Resources FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY REGULATIONS UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF...

  5. 42 CFR 403.254 - Calculation of premiums.

    Science.gov (United States)

    2010-10-01

    ... Ratio Provisions § 403.254 Calculation of premiums. (a) General provisions. To calculate the amount of... loss ratio calculation period. (b) Specific provisions. (1) Earned premium for a given period means— (i) Written premiums for the period; plus— (ii) The total premium reserve at the beginning of the period;...

  6. 47 CFR 1.254 - Nature of the hearing; burden of proof.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Nature of the hearing; burden of proof. 1.254 Section 1.254 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE Hearing Proceedings Hearing and Intermediate Decision § 1.254 Nature of the hearing; burden of proof. Any hearing...

  7. Long-term effects of an intracavitary treatment with californium-252 on normal tissue. [Swine, /sup 226/Ra

    Energy Technology Data Exchange (ETDEWEB)

    Sullivan, M.F.; Beamer, J.L.; Mahony, T.D.; Cross, F.T.; Lund, J.E.; Endres, G.W.R.

    1976-01-01

    About one hundred fifty swine were exposed to either radium-226 or californium-252 sources in the uterine cervix to determine an RBE for both acute and long-term effects. That value for early changes in the tissues at risk in the treatment of cervical cancer was between 6.2 and 6.8. The incidence of complications increased with time after exposure, especially among animals treated with /sup 252/Cf. Analysis of rectal injury showed that ulceration occurred frequently within a year postexposure at doses between 1600 and 2400 rad calculated at 2 cm lateral to the source midline. Fat necrosis and smooth muscle atrophy, resulting in a local rectal stricture, were delayed changes observed in some animals. The lower ureter was the site for a greater frequency of complications than the GI tract. Ureteral stricture often occurred at doses of 1200 rad from /sup 252/Cf and 7000 rad from /sup 226/Ra. Observation of delayed effects in the uterine-cervix in animals held up to 4 years postexposure indicate that the RBE for /sup 252/Cf may be increased to a value as high as 18, while repair may have even decreased it to about 5.6 in the rectum. Fifty swine are still being observed for long-term effects after doses above 800 rad from /sup 252/Cf and 5000 rad from /sup 226/Ra.

  8. Development of electron beam ion source charge breeder for rare isotopes at Californium Rare Isotope Breeder Upgrade

    Energy Technology Data Exchange (ETDEWEB)

    Kondrashev, S.; Dickerson, C.; Levand, A.; Ostroumov, P. N.; Pardo, R. C.; Savard, G.; Vondrasek, R. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Alessi, J.; Beebe, E.; Pikin, A. [Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973 (United States); Kuznetsov, G. I.; Batazova, M. A. [Budker Institute of Nuclear Physics, Novosibirsk 630090 (Russian Federation)

    2012-02-15

    Recently, the Californium Rare Isotope Breeder Upgrade (CARIBU) to the Argonne Tandem Linac Accelerator System (ATLAS) was commissioned and became available for production of rare isotopes. Currently, an electron cyclotron resonance ion source is used as a charge breeder for CARIBU beams. To further increase the intensity and improve the purity of neutron-rich ion beams accelerated by ATLAS, we are developing a high-efficiency charge breeder for CARIBU based on an electron beam ion source (EBIS). The CARIBU EBIS charge breeder will utilize the state-of-the-art EBIS technology recently developed at Brookhaven National Laboratory (BNL). The electron beam current density in the CARIBU EBIS trap will be significantly higher than that in existing operational charge-state breeders based on the EBIS concept. The design of the CARIBU EBIS charge breeder is nearly complete. Long-lead components of the EBIS such as a 6-T superconducting solenoid and an electron gun have been ordered with the delivery schedule in the fall of 2011. Measurements of expected breeding efficiency using the BNL Test EBIS have been performed using a Cs{sup +} surface ionization ion source for external injection in pulsed mode. In these experiments we have achieved {approx}70% injection/extraction efficiency and breeding efficiency into the most abundant charge state of {approx}17%.

  9. Development of electron beam ion source charge breeder for rare isotopes at Californium Rare Isotope Breeder Upgrade

    Energy Technology Data Exchange (ETDEWEB)

    Kondrashev S.; Alessi J.; Dickerson, C.; Levand, A.; Ostroumov, P.N.; Pardo, R.C.; Savard, G.; Vondrasek, R.; Beebe, E.; Pikin, A.; Kuznetsov, G.I.; Batazova, M.A.

    2012-02-03

    Recently, the Californium Rare Isotope Breeder Upgrade (CARIBU) to the Argonne Tandem Linac Accelerator System (ATLAS) was commissioned and became available for production of rare isotopes. Currently, an electron cyclotron resonance ion source is used as a charge breeder for CARIBU beams. To further increase the intensity and improve the purity of neutron-rich ion beams accelerated by ATLAS, we are developing a high-efficiency charge breeder for CARIBU based on an electron beam ion source (EBIS). The CARIBU EBIS charge breeder will utilize the state-of-the-art EBIS technology recently developed at Brookhaven National Laboratory (BNL). The electron beam current density in the CARIBU EBIS trap will be significantly higher than that in existing operational charge-state breeders based on the EBIS concept. The design of the CARIBU EBIS charge breeder is nearly complete. Long-lead components of the EBIS such as a 6-T superconducting solenoid and an electron gun have been ordered with the delivery schedule in the fall of 2011. Measurements of expected breeding efficiency using the BNL Test EBIS have been performed using a Cs{sup +} surface ionization ion source for external injection in pulsed mode. In these experiments we have achieved {approx}70% injection/extraction efficiency and breeding efficiency into the most abundant charge state of {approx}17%.

  10. Ozone and UV254 radiation for municipal wastewater disinfection.

    Science.gov (United States)

    Blatchley, Ernest R; Weng, Shihchi; Afifi, Mehrnaz Zare; Chiu, Hsiao-Han; Reichlin, Douglas B; Jousset, Stéphane; Erhardt, Richard S

    2012-11-01

    Bench-scale experiments were conducted with municipal wastewater effluent samples to examine the feasibility of combined application of ozone and ultraviolet (UV) radiation for disinfection. Effluent samples displayed rapid initial ozone demand, which promotes ozone transfer but diminishes disinfection efficacy. Ozone doses up to 10 mg/L yielded only trace quantities of residual ozone; despite the fact that initial ozone demand was never exceeded, quantifiable (though variable) inactivation of E. coli was observed, along with modest improvements of UV transmittance. Results from collimated beam experiments demonstrated that compliance with effluent discharge permit limitations could be achieved consistently with a UV254 dose of 12.4 mJ/cm2 at a pre-ozonation dose of 2 to 3 mg/L. In the absence of pre-ozonation, consistent compliance was observed at a UV dose of 16.5 mJ/cm2. No evidence of synergism between ozone and UV254 radiation was found in the measured inactivation responses of E. coli.

  11. Exploring the stability of super heavy elements: First Measurement of the Fission Barrier of 254No

    Directory of Open Access Journals (Sweden)

    Henning G.

    2014-03-01

    Full Text Available The gamma-ray multiplicity and total energy emitted by the heavy nucleus 254No have been measured at 2 different beam energies. From these measurements, the initial distributions of spin I and excitation energy E∗ of 254No were constructed. The distributions display a saturation in excitation energy, which allows a direct determination of the fission barrier. 254No is the heaviest shell-stabilized nucleus with a measured fission barrier.

  12. 30 CFR 254.45 - Verifying the capabilities of your response equipment.

    Science.gov (United States)

    2010-07-01

    ... accordance with MMS-approved test criteria. You may use the document “Test Protocol for the Evaluation of Oil... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Verifying the capabilities of your response equipment. 254.45 Section 254.45 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE...

  13. 30 CFR 254.46 - Whom do I notify if an oil spill occurs?

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Whom do I notify if an oil spill occurs? 254.46... Outer Continental Shelf Facilities § 254.46 Whom do I notify if an oil spill occurs? (a) You must immediately notify the National Response Center (1-800-424-8802) if you observe: (1) An oil spill from...

  14. 37 CFR 2.54 - Requirements for drawings submitted on paper.

    Science.gov (United States)

    2010-07-01

    ... submitted on paper. 2.54 Section 2.54 Patents, Trademarks, and Copyrights UNITED STATES PATENT AND TRADEMARK... drawings submitted on paper. The drawing must meet the requirements of § 2.52. In addition, in a paper submission, the drawing should: (a) Be on non-shiny white paper that is separate from the application; (b)...

  15. 40 CFR 421.254 - Standards of performance for new sources.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 28 2010-07-01 2010-07-01 true Standards of performance for new sources. 421.254 Section 421.254 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) EFFLUENT GUIDELINES AND STANDARDS NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY Primary...

  16. 48 CFR 53.204-1 - Safeguarding classified information within industry (DD Form 254, DD Form 441).

    Science.gov (United States)

    2010-10-01

    ... information within industry (DD Form 254, DD Form 441). 53.204-1 Section 53.204-1 Federal Acquisition....204-1 Safeguarding classified information within industry (DD Form 254, DD Form 441). The following... specified in subpart 4.4 and the clause at 52.204-2: (a) DD Form 254 (Department of Defense (DOD)),...

  17. Structure and formation mechanism of the transfermium isotope {sup 254}No.

    Energy Technology Data Exchange (ETDEWEB)

    Reiter, P.

    1998-12-17

    The ground-state band of the Z=102 isotope {sup 254}No has been identified up to spin 14, indicating that the nucleus is deformed. The deduced quadruple deformation, {beta} = 0.27, is in agreement with theoretical predictions. These observations confirm that the shell-correction energy responsible for the stability of transfermium nuclei is partly derived from deformation. The survival of {sup 254}No up to spin 14 means that its fission barrier persists at least up to that spin.

  18. cdc-25.4, a Caenorhabditis elegans Ortholog of cdc25, Is Required for Male Mating Behavior

    Directory of Open Access Journals (Sweden)

    Sangmi Oh

    2016-12-01

    Full Text Available Cell division cycle 25 (cdc25 is an evolutionarily conserved phosphatase that promotes cell cycle progression. Among the four cdc25 orthologs in Caenorhabditis elegans, we found that cdc-25.4 mutant males failed to produce outcrossed progeny. This was not caused by defects in sperm development, but by defects in male mating behavior. The cdc-25.4 mutant males showed various defects during male mating, including contact response, backing, turning, and vulva location. Aberrant turning behavior was the most prominent defect in the cdc-25.4 mutant males. We also found that cdc-25.4 is expressed in many neuronal cells throughout development. The turning defect in cdc-25.4 mutant males was recovered by cdc-25.4 transgenic expression in neuronal cells, suggesting that cdc-25.4 functions in neurons for male mating. However, the neuronal morphology of cdc-25.4 mutant males appeared to be normal, as examined with several neuronal markers. Also, RNAi depletion of wee-1.3, a C. elegans ortholog of Wee1/Myt1 kinase, failed to suppress the mating defects of cdc-25.4 mutant males. These findings suggest that, for successful male mating, cdc-25.4 does not target cell cycles that are required for neuronal differentiation and development. Rather, cdc-25.4 likely regulates noncanonical substrates in neuronal cells.

  19. 48 CFR 53.303-254-53.303-347 - Illustration of agency forms.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Illustration of agency... FEDERAL ACQUISITION REGULATION (CONTINUED) CLAUSES AND FORMS FORMS Illustrations of Forms 53.303-254—53.303-347 Illustration of agency forms. Editorial Note: The forms appearing in sections...

  20. 30 CFR 250.254 - What mitigation measures information must accompany the DPP or DOCD?

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 2 2010-07-01 2010-07-01 false What mitigation measures information must... Information Contents of Development and Production Plans (dpp) and Development Operations Coordination Documents (docd) § 250.254 What mitigation measures information must accompany the DPP or DOCD? (a) If...

  1. 16 CFR 254.6 - Deceptive use of diplomas, degrees, or certificates.

    Science.gov (United States)

    2010-01-01

    ... 16 Commercial Practices 1 2010-01-01 2010-01-01 false Deceptive use of diplomas, degrees, or... GUIDES FOR PRIVATE VOCATIONAL AND DISTANCE EDUCATION SCHOOLS § 254.6 Deceptive use of diplomas, degrees, or certificates. (a) It is deceptive for an industry member to issue a degree, diploma,...

  2. Removal of UV 254 nm matter and nutrients from a photobioreactor-wetland system.

    Science.gov (United States)

    Wu, Yonghong; He, Jiangzhou; Hu, Zhengyi; Yang, Linzhang; Zhang, Naiming

    2011-10-30

    The output of organic pollutants and excessive nutrients in intensive agricultural areas has frequently occurred, which easily lead to pollution events such as harmful algal blooms in downstream aquatic ecosystems. A photobioreactor-wetland system was applied to remove UV(254 nm) matter and dissolved nutrients discharged from an intensive agricultural area in the Kunming region of western China. The photobioreactor-wetland system was composed of two main components: an autotrophic photobioreactor with replanted macrophytes and a constructed wetland. The results showed that there was a significant correlation between UV(245)(nm) absorbance and chemical oxygen demand (COD) concentration in the effluent of the agricultural ecosystem. When the hydraulic load of the photobioreactor-wetland system was 500 m(3)day(-1), the UV(254 nm) absorbance was dramatically reduced, and dissolved nutrients such as TDP, NO(3)-N and NH(4)-N were effectively removed. The overall average removal efficiencies were as follows in relatively steady-state conditions: UV(254 nm) matter (66%), TDP (71%), NO(3)-N (75%) and NH(4)-N (65%). Simpson's diversity index of zoobenthos indicated that the system could increase the zoobenthic diversity and improve the growth conditions of the zoobenthos habitat. The results also showed that the photobioreactor-wetland system could remove the UV(254 nm) matter and dissolved nutrients, providing a promising bio-measure for reducing the risk of pollution event occurrences in downstream surface waters.

  3. 6 CFR 25.4 - Designation of qualified anti-terrorism technologies.

    Science.gov (United States)

    2010-01-01

    ... 6 Domestic Security 1 2010-01-01 2010-01-01 false Designation of qualified anti-terrorism... REGULATIONS TO SUPPORT ANTI-TERRORISM BY FOSTERING EFFECTIVE TECHNOLOGIES § 25.4 Designation of qualified anti-terrorism technologies. (a) General. The Under Secretary may Designate as a Qualified...

  4. 42 CFR 84.254 - Powered air-purifying respirators; requirements and tests.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 1 2010-10-01 2010-10-01 false Powered air-purifying respirators; requirements and... DEVICES Special Use Respirators § 84.254 Powered air-purifying respirators; requirements and tests. (a... air-purifying respirators prescribed in subpart L of this part are applicable to vinyl...

  5. INDUCED STAR FORMATION IN THE HII REGION SH2-54

    Directory of Open Access Journals (Sweden)

    J. Vasquez

    2011-01-01

    Full Text Available En este trabajo presentamos un estudio multifrecuencia del medio interstelar en el entorno de la región HII Sh2-54. El gas molecular y el polvo se han analizado y descripto por medio de las observaciones milimétricas e infrarrojas, respectivamente. La emisión en 8.0 ¿Êm de Spitzer-IRAC presenta una compleja estructura filamentaria de gas fotodisociado, evidenciando la interacción entre la región HII y el gas molecular. Numerosos candidatos a objetos estelares jóvenes se encuentran proyectados sobre Sh2-54 y sus alrededores. Analizamos si la presencia de estos objetos puede ser explicada dentro de un escenario de formación estelar inducida.

  6. Coulomb dissociation of {sup 8}B at 254 A MeV

    Energy Technology Data Exchange (ETDEWEB)

    Suemmerer, K.; Boue, F.; Baumann, T.; Geissel, H.; Hellstroem, M.; Koczon, P.; Schwab, E.; Schwab, W.; Senger, P.; Surowiecz, A. [Gesellschaft fuer Schwerionenforschung (GSI), Darmstadt (Germany); Iwasa, N.; Ozawa, A. [Gesellschaft fuer Schwerionenforschung (GSI), Darmstadt (Germany)]|[RIKEN Institute of Physical and Chemical Research, Saitama (Japan); Surowka, G. [Gesellschaft fuer Schwerionenforschung (GSI), Darmstadt (Germany)]|[Jagiellonian Univ., Krakow (Poland). Inst. of Physics; Blank, B.; Czajkowski, S.; Marchand, C.; Pravikoff, M.S. [Centre d`Etudes Nucleaires de Bordeaux-Gradignan, 33 (France); Foerster, A.; Lauer, F.; Oeschler, H.; Speer, J.; Sturm, C.; Uhlig, F.; Wagner, A. [Technische Univ. Darmstadt (Germany); Gai, M. [Connecticut Univ., Storrs, CT (United States). Dept. of Physics; Grosse, E. [Inst. fuer Kern- und Hadronenphysik, Forschungszentrum Rossendorf, Dresden (Germany); Kohlmeyer, B. [Philipps Univ., Marburg (Germany). Fachbereich Physik; Kulessa, R.; Walus, W. [Jagiellonian Univ., Krakow (Poland). Inst. of Physics; Motobayashi, T. [Rikkyo Univ., Tokyo (Japan). Dept. of Physics; Teranishi, T. [RIKEN Institute of Physical and Chemical Research, Saitama (Japan)

    1998-06-01

    As an alternative method for determining the astrophysical S-factor for the {sup 7}Be(p,{gamma}){sup 8}B reaction we have measured the Coulomb dissociation of {sup 8}B at 254 A MeV. From our preliminary results, we obtain good agreement with both the accepted direct-reaction measurements and the low-energy Coulomb dissociation study of Iwasa et al. performed at about 50 A MeV. (orig.)

  7. CHARACTERIZING THE COOL KOIs. II. THE M DWARF KOI-254 AND ITS HOT JUPITER

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, John Asher; Muirhead, Philip S.; Crepp, Justin R.; Morton, Timothy D. [Department of Astrophysics, California Institute of Technology, MC 249-17, Pasadena, CA 91125 (United States); Gazak, J. Zachary [Institute for Astronomy, University of Hawai' i, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Apps, Kevin [Cheyne Walk Observatory, 75B Cheyne Walk, Horley, Surrey, RH6 7LR (United Kingdom); Crossfield, Ian J. M. [Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095 (United States); Tabetha Boyajian [Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 4106, Atlanta, GA 30302-4106 (United States); Von Braun, Kaspar [NASA Exoplanet Science Institute (NExScI), CIT Mail Code 100-22, 770 South Wilson Avenue, Pasadena, CA 91125 (United States); Rojas-Ayala, Barbara [Department of Astrophysics, Division of Physical Sciences, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024 (United States); Howard, Andrew W.; Marcy, Geoffrey W. [Department of Astronomy, University of California, Mail Code 3411, Berkeley, CA 94720 (United States); Covey, Kevin R.; Schlawin, Everett; Lloyd, James P. [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States); Hamren, Katherine, E-mail: johnjohn@astro.caltech.edu [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)

    2012-05-15

    We report the confirmation and characterization of a transiting gas giant planet orbiting the M dwarf KOI-254 every 2.455239 days, which was originally discovered by the Kepler mission. We use radial velocity measurements, adaptive optics imaging, and near-infrared spectroscopy to confirm the planetary nature of the transit events. KOI-254 b is the first hot Jupiter discovered around an M-type dwarf star. We also present a new model-independent method of using broadband photometry to estimate the mass and metallicity of an M dwarf without relying on a direct distance measurement. Included in this methodology is a new photometric metallicity calibration based on J - K colors. We use this technique to measure the physical properties of KOI-254 and its planet. We measure a planet mass of M{sub P} = 0.505 M{sub Jup}, radius R{sub P} = 0.96 R{sub Jup}, and semimajor axis a = 0.030 AU, based on our measured stellar mass M{sub *} = 0.59 M{sub Sun} and radius R{sub *} = 0.55 R{sub Sun }. We also find that the host star is metal-rich, which is consistent with the sample of M-type stars known to harbor giant planets.

  8. Stability of {sup 248–254}Cf isotopes against alpha and cluster radioactivity

    Energy Technology Data Exchange (ETDEWEB)

    Santhosh, K.P., E-mail: drkpsanthosh@gmail.com; Biju, R.K.

    2013-07-15

    Stability of {sup 248–254}Cf nuclei against alpha and cluster emissions is studied within our Coulomb and proximity potential model (CPPM). It is found that these nuclei are stable against light clusters (except alpha particles) and unstable against heavy cluster (A{sub 2}≥40) emissions. For heavy cluster emissions the daughter nuclei lead to doubly magic {sup 208}Pb or the neighbouring one. The effects of quadrupole and hexadecapole deformations of parent nuclei, daughter nuclei and emitted cluster on half lives are also studied. The computed alpha decay half life values (including quadrupole deformation β{sub 2}) are in close agreement with experimental data. Inclusion of quadrupole deformation reduces the height and width of the barrier (increases the barrier penetrability) and hence half life decreases. -- Highlights: •{sup 248–254}Cf parents are stable against light clusters (except alpha particles) and are unstable against heavy clusters ({sup 46}Ar, {sup 48,50}Ca etc.). •For the case of heavy cluster emissions the daughter nuclei are doubly magic {sup 208}Pb or neighbouring one. •The alpha decay half lives are in agreement with experimental data. •The cluster decay half lives decrease with the inclusion of quadrupole deformation.

  9. Bacterial inactivation by solar ultraviolet radiation compared with sensitivity to 254 nm radiation.

    Science.gov (United States)

    Coohill, Thomas P; Sagripanti, Jose-Luis

    2009-01-01

    Our goal was to derive a quantitative factor that would allow us to predict the solar sensitivity of vegetative bacterial cells to natural solar radiation from the wealth of data collected for cells exposed to UVC (254 nm) radiation. We constructed a solar effectiveness spectrum for inactivation of vegetative bacterial cells by combining the available action spectra for vegetative cell killing in the solar range with the natural sunlight spectrum that reaches the ground. We then analyzed previous studies reporting the effects of solar radiation on vegetative bacterial cells and on bacterial spores. Although UVC-sensitive cells were also more sensitive to solar radiation, we found no absolute numerical correlation between the relative solar sensitivity of vegetative cells and their sensitivity to 254 nm radiation. The sensitivity of bacterial spores to solar exposure during both summer and winter correlated closely to their UVC sensitivity. The estimates presented here should make it possible to reasonably predict the time it would take for natural solar UV to kill bacterial spores or with a lesser degree of accuracy, vegetative bacterial cells after dispersion from an infected host or after an accidental or intentional release.

  10. Californium Recovery from Palladium Wire

    Energy Technology Data Exchange (ETDEWEB)

    Burns, Jon D. [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

    2014-08-01

    The recovery of 252Cf from palladium-252Cf cermet wires was investigated to determine the feasibility of implementing it into the cermet wire production operation at Oak Ridge National Laboratory’s Radiochemical Engineering Development Center. The dissolution of Pd wire in 8 M HNO3 and trace amounts of HCl was studied at both ambient and elevated temperatures. These studies showed that it took days to dissolve the wire at ambient temperature and only 2 hours at 60°C. Adjusting the ratio of the volume of solvent to the mass of the wire segment showed little change in the kinetics of dissolution, which ranged from 0.176 mL/mg down to 0.019 mL/mg. A successful chromatographic separation of 153Gd, a surrogate for 252Cf, from Pd was demonstrated using AG 50x8 cation exchange resin with a bed volume of 0.5 mL and an internal diameter of 0.8 cm.

  11. Printed wax masks for 254 nm deep-UV pattering of PMMA-based microfluidics

    KAUST Repository

    Fan, Yiqiang

    2012-01-13

    This paper reports a new technique for masking deep-UV exposure of poly(methyl methacrylate) (PMMA) using a printed wax mask. This technique provides an inexpensive and bulk fabrication method for PMMA structures. The technique involves the direct printing of the mask onto a polymer sheet using a commercial wax printer. The wax layer was then transferred to a PMMA substrate using a thermal laminator, exposed using deep-UV (with a wavelength of 254 nm), developed in an IPA:water solution, and completed by bonding on a PMMA cap layer. A sample microfluidic device fabricated with this method is also presented, with the microchannel as narrow as 50 μm. The whole process is easy to perform without the requirement for any microfabrication facilities. © 2012 IOP Publishing Ltd.

  12. Stability of 248-254^Cf isotopes against alpha and cluster radioactivity

    CERN Document Server

    Santhosh, K P

    2013-01-01

    Stability of 248-254^Cf nuclei against alpha and cluster emission is studied within our Coulomb and proximity potential model (CPPM). It is found that these nuclei are stable against light clusters (except alpha particle) and instable against heavy cluster emissions. For heavy cluster emissions the daughter nuclei lead to doubly magic 208^Pb or neighbouring one. The effect of quadrapole and hexadecapole deformations of parent nuclei, daughter nuclei and emitted cluster on half lives are also studied. The computed alpha decay half life values (with including quadrupole deformation {\\beta}2) are in close agreement with experimental data. Inclusion of quadrupole deformation reduces the height and width of the barrier (increases the barrier penetrability) and hence half life decreases.

  13. Rotation Period Determination for 254 Augusta, 465 Alekto 477 Italia, 515 Athalia, and 1061 Paeonia

    Science.gov (United States)

    Pilcher, Frederick

    2015-04-01

    Synodic rotation periods and amplitudes have been found for 254 Augusta 5.8949 ± 0.0001 hours, 0.75 to 0.58 magnitudes; 465 Alekto, 10.936 ± 0.001 hours, 0.14 ± 0.02 magnitudes with 3 maxima and minima per cycle; 477 Italia 19.413 ± 0.001 hours, 0.20 to 0.15 magnitudes with 3 very unequal maxima and minima per cycle; 515 Athalia 10.636 ± 0.001 hours, 0.21 ± 0.02 magnitudes; and 1061 Paeonia, 7.9971 ± 0.0001 hours, 1.00 ± 0.05 magnitudes.

  14. Rotational properties in even-even superheavy $^{254-258}$Rf nuclei based on total-Routhian-surface calculations

    CERN Document Server

    Hua-Lei, Wang; Jin-Ge, Jiang; Min-Liang, Liu

    2013-01-01

    High-spin yrast structures of even-even superheavy nuclei $^{254-258}$Rf are investigated by means of total-Routhian-surface approach in three-dimensional ($\\beta_2, \\gamma, \\beta_4$) space. The behavior in the moments of inertia of $^{256}$Rf is well reproduced by our calculations, which is attributed to the $j_{15/2}$ neutron rotation-alignment. The competition between rotationally aligned $i_{13/2}$ proton and $j_{15/2}$ neutron is discussed. High-spin predictions are also made for its neighboring isotopes $^{254,258}$Rf.

  15. 30 CFR 254.28 - What information must I include in the “In situ burning plan” appendix?

    Science.gov (United States)

    2010-07-01

    ... for ignition of an oil spill; (c) A discussion of environmental effects of an in situ burn; (d) Your... THE INTERIOR OFFSHORE OIL-SPILL RESPONSE REQUIREMENTS FOR FACILITIES LOCATED SEAWARD OF THE COAST LINE Oil-Spill Response Plans for Outer Continental Shelf Facilities § 254.28 What information must...

  16. A prospective study on time to recovery in 254 injured novice runners.

    Directory of Open Access Journals (Sweden)

    Rasmus Oestergaard Nielsen

    Full Text Available Describe the diagnoses and the time to recovery of running-related injuries in novice runners.Prospective cohort study on injured runners.This paper is a secondary data analysis of a 933-person cohort study (DANO-RUN aimed at characterizing risk factors for injury in novice runners. Among those sustaining running-related injuries, the types of injuries and time to recovery is described in the present paper. All injured runners were diagnosed after a thorough clinical examination and then followed prospectively during their recovery. If they recovered completely from injury, time to recovery of each injury was registered.A total of 254 runners were injured. The proportion of runners diagnosed with medial tibial stress syndrome was 15%, 10% for patellofemoral pain, 9% for medial meniscal injury, 7% for Achilles tendinopathy and 5% for plantar fasciitis. Among the 220 runners (87% recovering from their injury, the median time to recovery was 71 days (minimum  = 9 days, maximum  = 617 days.Medial tibial stress syndrome was the most common injury followed by patellofemoral pain, medial meniscal injury and Achilles tendinopathy. Half of the injured runners were unable to run 2×500 meters without pain after 10 weeks. Almost 5% of the injured runners received surgical treatment.

  17. Cold valleys in the radioactive decay of 248-254Cf isotopes

    Indian Academy of Sciences (India)

    R K Biju; Sabina Sahadevan; K P Santosh; Antony Joseph

    2008-04-01

    Based on the concept of cold valley in cold fission and fusion, we have investigated the cluster decay process in 248-254Cf isotopes. In addition to alpha particle minima, other deep minima occur for S, Ar and Ca clusters. It is found that inclusion of proximity potential does not change the position of minima but minima become deeper. Taking Coulomb and proximity potential as interacting barrier for post-scission region, we computed half-lives and other characteristics for various clusters from these parents. Our study reveals that these parents are stable against light clusters and unstable against heavy clusters. Computed half-lives for alpha decay agree with experimental values within two orders of magnitude. The most probable clusters from these parents are predicted to be 46Ar, 48,50Ca which indicate the role of doubly or near doubly magic clusters in cluster radioactivity. Odd A clusters are found to be favorable for emission from odd A parents. Cluster decay model is extended to symmetric region and it is found that symmetric fission is also probable which stresses the role of doubly or near doubly magic 132Sn nuclei. Geiger-Nuttal plots were studied for various clusters and are found to be linear with varying slopes and intercepts.

  18. Critical pitting temperature for Type 254 SMO stainless steel in chloride solutions

    Energy Technology Data Exchange (ETDEWEB)

    Abd El Meguid, E.A. [Department of Electrochemistry and Corrosion, National Research Centre, Dokki, Cairo (Egypt)]. E-mail: eameguid_nrc@yahoo.com; Abd El Latif, A.A. [Department of Electrochemistry and Corrosion, National Research Centre, Dokki, Cairo (Egypt)

    2007-02-15

    The variation with time of the open circuit potential of high molybdenum containing stainless steel (Type 254 SMO) was measured in 4% sodium chloride solution in the temperatures range 30-100 deg. C. The plot of steady state potentials as function of temperature showed an inflection at 50 deg. C, attributed to the decrease of oxygen solubility in test solution above 50 deg. C. Potentiodynamic cycling anodic polarization technique was used to determine the critical pitting potential (E {sub pit}) and the critical protection potential (E {sub prot}) of the steel in 4-30% NaCl solutions at temperatures between 30 and 100 deg. C. By plotting the two values versus solution temperature, the corresponding critical pitting (CPT) and the critical protection (CPrT) temperatures were determined. Both parameters decreased with increasing chloride content. Above the CPT, E {sub pit} and E {sub prot} decreased linearly with log[Cl{sup -}]. The addition of bromide ions to the solution shifted both E {sub pit} and E {sub prot} towards positive values. In 4% NaCl, E {sub pit} increased linearly with pH in the range 1-10. The combined effect of chloride ion concentration and pH on the morphology of the pits was examined by scanning electron microscopy (SEM) following potentiodynamic cycling anodic polarization.

  19. Design of a homogeneous subcritical nuclear reactor based on thorium with a source of californium 252; Diseno de un reactor nuclear subcritico homogeneo a base de Torio con una fuente de Californio 252

    Energy Technology Data Exchange (ETDEWEB)

    Delgado H, C. E.; Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas, Zac. (Mexico); Sajo B, L., E-mail: ce_delgado89@hotmail.com [Universidad Simon Bolivar, Laboratorio de Fisica Nuclear, Apdo. 89000, 1080A Caracas (Venezuela, Bolivarian Republic of)

    2015-10-15

    Full text: One of the energy alternatives to fossil fuels which do not produce greenhouse gases is the nuclear energy. One of the drawbacks of this alternative is the generation of radioactive wastes of long half-life and its relation to the generation of nuclear materials to produce weapons of mass destruction. An option to these drawbacks of nuclear energy is to use Thorium as part of the nuclear fuel which it becomes in U{sup 233} when capturing neutrons, that is a fissile material. In this paper Monte Carlo methods were used to design a homogeneous subcritical reactor based on thorium. As neutron reflector graphite was used. The reactor core is homogeneous and is formed of 70% light water as moderator, 12% of enriched uranium UO{sub 2}(NO{sub 3}){sub 4} and 18% of thorium Th(NO{sub 3}){sub 4} as fuel. To start the nuclear fission chain reaction an isotopic source of californium 252 was used with an intensity of 4.6 x 10{sup 7} s{sup -1}. In the design the value of the effective multiplication factor, whose value turned out k{sub eff} <1 was calculated. Also, the neutron spectra at different distances from the source and the total fluence were calculated, as well as the values of the ambient dose equivalent in the periphery of the reactor. (Author)

  20. Manganese determination om minerals by activation analysis, using the californium-252 as a neutron source; Determinacao de manganes em minerios, por analise por ativacao, usando californio-252 como fonte de neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Cardoso, Antonio

    1976-07-01

    Neutron Activation Analysis, using a Californium-252 neutron source, has been applied for the determination of manganese in ores such as pyrolusite, rodonite (manganese silicate)' and blending used in dry-batteries The favorable nuclear properties of manganese, such as high thermal neutron cross-section for the reaction {sup 55}Mn (n.gamma){sup 56} Mn, high concentration of manganese in the matrix and short half - life of {sup 56}Mn, are an ideal combination for non-destructive analysis of manganese in ores. Samples and standards of manganese dioxide were irradiated for about 20 minutes, followed by a 4 to 15 minutes decay and counted in a single channel pulse-height discrimination using a NaI(Tl) scintillation detector. Counting time was equal to 10 minutes. The interference of nuclear reactions {sup 56}Fe(n,p){sup 56}Mn and {sup 59} Co (n, {alpha}){sup 56} were studied, as well as problems in connection with neutron shadowing during irradiation, gamma-rays attenuation during counting and influence of granulometry of samples. One sample,was also analysed by wet-chemical method (sodium bismuthate) in order to compare results. As a whole, i t was shown that the analytical method of neutron activation for manganese in ores and blending, is a method simple, rapid and with good precision and accuracy. (author)

  1. Electrochemical and SEM study on Type 254 SMO stainless steel in chloride solutions

    Energy Technology Data Exchange (ETDEWEB)

    Abd El Meguid, E.A.; Abd El Latif, A.A

    2004-10-01

    An investigation was conducted to examine the critical crevice potential (E{sub crev}) and the critical protection potential (E{sub prot}) for Type 254 SMO stainless steel in 4% NaCl solution by using potentiodynamic cyclic anodic polarization (PCAP) technique at temperature ranging from 30 to 90 deg. C. The critical crevice temperature (CCT) and the critical crevice protection temperature (T{sub prot}) were determined by plotting the values of breakdown potential and E{sub prot} versus solution temperature, respectively. The values of CCT and T{sub prot} were recorded at the abrupt transition with increasing the temperature from transpassive corrosion to crevice corrosion and were found to be at 55 and 52 deg. C, respectively. Above CCT (70 deg. C) the following points were recorded. The E{sub crev} and E{sub prot} decreased linearly with log [Cl{sup -}]. The addition of bromide ions to chloride ions at a fixed halide content of 4% increased both E{sub crev} and E{sub prot}. The E{sub crev} value in 4% NaCl increased linearly with increasing pH in the range 1-10. The addition of 0.5 M bicarbonate ions to 4% NaCl completely removed the crevices effect while increasing the addition of sulphate ions to 4% NaCl increased both of E{sub crev} and E{sub prot}. The morphology of the crevice corrosion produced on the steel surface was examined by scanning electron microscope (SEM) after PCAP treatment under different test conditions.

  2. Application of the Baade-Wesselink method to a pulsating cluster Herbig Ae star: H254 in IC348

    CERN Document Server

    Ripepi, V; Marconi, M; Catanzaro, G; Claudi, R; Daszyńska-Daszkiewicz, J; Palla, F; Leccia, S; Bernabei, S

    2013-01-01

    In this paper we present new photometric and radial velocity data for the PMS $\\delta$ Sct star H254, member of the young cluster IC 348. Photometric V,R$_C$,I$_C$ light curves were obtained at the Loiano and Asiago telescopes. The radial velocity data was acquired by means of the SARG@TNG spectrograph. High-resolution spectroscopy allowed us to derive precise stellar parameters and the chemical composition of the star, obtaining: T$_{\\rm eff}$\\,=\\,6750\\,$\\pm$\\,150 K; $\\log g$\\,=\\,4.1\\,$\\pm$\\,0.4 dex; [Fe/H]=-0.07$\\pm$0.12 dex. Photometric and spectroscopic data were used to estimate the total absorption in the $V$ band A$_{\\rm V}$=2.06$\\pm$0.05 mag, in agreement with previous estimates. We adopted the technique of the difference in phase and amplitude between different photometric bands and radial velocities to verify that H254 is (definitely) pulsating in a radial mode. This occurrence allowed us to apply the CORS realization of the Baade--Wesselink method to obtain a value for the linear radius of H254 equ...

  3. Study on Removal Effect of Turbidity and UV254 from water by Enhanced Coagulation%强化混凝技术去除水体中浊度和UV254的试验研究

    Institute of Scientific and Technical Information of China (English)

    康孟新; 董琦; 张海亚

    2014-01-01

    通过静态烧杯试验,分析了聚合硫酸铁( PFS)和硫酸铝两种混凝剂在不同投加量、pH值和助凝剂投加量条件下,对水中浊度和UV254去除效果的影响。试验结果表明:对于去除水中的浊度而言,PFS的最佳投加量为60 mg/L,最佳pH值为7,最佳助凝剂的投加量为0.1mg/L;硫酸铝的最佳投加量为50 mg/L,最佳pH值为6.5,最佳助凝剂的投加量为0.05 mg/L。对于去除水中UV254而言,UV254的去除率均随着混凝剂和助凝剂投加量的增加而增加,最佳pH值为6.5;作为混凝剂PFS的总体性能要优于硫酸铝。最后通过正交试验确定了当混凝剂为PFS时,影响强化混凝处理效果的各因素的主次顺序依次为:PFS投加量、pH值、PAM投加量,强化混凝的最佳实验条件为PFS投加量为60 mg/L,水体的pH值为6.5,助凝剂的投加量为0.10 mg/L。%Through static simulation test,the impact of polymeric ferric sulfate( PFS) and aluminum sulfate on the enhanced coagulation for the removal of turbidity and UV254 was studied under the condition of different co-agulant dosage,pH values and coagulant aid dosage. The experimental results showed that for the turbidity,the optimum value of coagulant dosage for PFS was 60mg/L,the corresponding optimal value of pH was 7,the co-agulant aid dosage was 0. 1mg/L,and for aluminum sulfate the dosage was 50mg/L,the pH was 6. 5,the coag-ulant aid dosage was 0. 05mg/L;for the UV254 ,the rate of UV254 removal increased with the increasing of the co-agulant dosage and the coagulant aid dosage,the optimal pH was 6. 5;as to be coagulant,PFS was better than aluminum sulfate. At last,through the orthogonal test,the order of the key factors for the PFS were as follows:the dosage of PFS,the pH value and the dosage of coagulant aid. And the optimized experiment conditions were that the dosage of PFS was 60mg/L,the pH was 6. 5 and the dosage of coagulant aid was 0. 10mg/L.

  4. Tracing a phase transition with fluctuations of the largest fragment size: Statistical multifragmentation models and the ALADIN S254 data

    CERN Document Server

    Pietrzak, T; Aumann, T; Bacri, C O; Barczyk, T; Bassini, R; Bianchin, S; Boiano, C; Botvina, A S; Boudard, A; Brzychczyk, J; Chbihi, A; Cibor, J; Czech, B; De Napoli, M; Ducret, J -E; Emling, H; Frankland, J D; Hellstrom, M; Henzlova, D; Imme, G; Iori, I; Johansson, H; Kezzar, K; Lafriakh, A; Le Fèvre, A; Gentil, E Le; Leifels, Y; Luhning, J; Lukasik, J; Lynch, W G; Lynen, U; Majka, Z; Mocko, M; Muller, W F J; Mykulyak, A; Orth, H; Otte, A N; Palit, R; Pawlowski, P; Pullia, A; Raciti, G; Rapisarda, E; Sann, H; Schwarz, C; Sfienti, C; Simon, H; Summerer, K; Trautmann, W; Tsang, M B; Verde, G; Volant, C; Wallace, M; Weick, H; Wiechula, J; Wieloch, A; Zwieglinski, B

    2010-01-01

    A phase transition signature associated with cumulants of the largest fragment size distribution has been identified in statistical multifragmentation models and examined in analysis of the ALADIN S254 data on fragmentation of neutron-poor and neutron-rich projectiles. Characteristics of the transition point indicated by this signature are weakly dependent on the A/Z ratio of the fragmenting spectator source. In particular, chemical freeze-out temperatures are estimated within the range 5.9 to 6.5 MeV. The experimental results are well reproduced by the SMM model.

  5. Photoinitiated oxidation of geosmin and 2-methylisoborneol by irradiation with 254 nm and 185 nm UV light.

    Science.gov (United States)

    Kutschera, Kristin; Börnick, Hilmar; Worch, Eckhard

    2009-05-01

    The degradation of geosmin and 2-methylisoborneol (2-MIB) by UV irradiation at different wavelengths was investigated under varying boundary conditions. The results showed that conventional UV radiation (254 nm) is ineffective in removing these compounds from water. In contrast to the usual UV radiation UV/VUV radiation (254+185 nm) was more effective in the removal of the taste and odour compounds. The degradation could be described by a simple pseudo first-order rate law with rate constants of about 1.2 x 10(-3) m(2)J(-1) for geosmin and 2-MIB in ultrapure water. In natural water used for drinking water abstraction the rate constants decreased to 2.7 x 10(-4) m(2)J(-1) for geosmin and 2.5 x 10(-4) m(2)J(-1) for 2-MIB due to the presence of NOM. Additionally, the formation of the by-product nitrite was studied. In the UV/VUV irradiation process up to 0.6 mg L(-1) nitrite was formed during the complete photoinitiated oxidation of the odour compounds. However, the addition of low ozone doses could prevent the formation of nitrite in the UV/VUV irradiation experiments.

  6. Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254 nm UV light.

    Science.gov (United States)

    Zhao, Sufang; Ma, Hongjuan; Wang, Min; Cao, Changqing; Xiong, Jie; Xu, Yunshu; Yao, Side

    2010-08-15

    The degradation mechanism of p-nitrophenol (p-NP) exposed to 254 nm UV light was studied in the presence and the absence of oxygen respectively via both steady-state photolysis and time-resolved laser flash photolysis (LFP) experiments. It has been confirmed that p-NP can be photo-ionized to produce its radical cation (p-NP(+)) and hydrated electron (e(aq)(-)) with a quantum yield of 0.52. In neutral solution p-NP(+) will be quickly deprotonated to form its phenoxyl radical (p-NP) which will react with oxygen to promote the breakage of benzene ring of p-NP. The degradation efficiency of p-NP exposed to 254 nm UV is as low as commonly reported. However, oxygen could improve the photo-degradation efficiency, which is due to the reaction of oxygen with p-NP. The reaction between oxygen and p-NP has been experimentally confirmed both in LFP and in pulse radiolysis.

  7. Comparative ultraviolet action spectra (254-320 nm) of five wild-type eukaryotic microorganisms and Escherichia coli

    Energy Technology Data Exchange (ETDEWEB)

    Calkins, J.; Wheeler, J.S.; Keller, C.I.; Colley, E.; Hazle, J.D.

    1988-05-01

    The action spectra of five eukaryotic organisms and the prokaryote, Escherichia coli, were examined over the wavelength range, 254-320 nm. Both the repair competent and three repair defective strains (E. coli, Caenorhabditis elegans, Saccharomyces) were examined. Tetrahymena pyriformis action spectra were performed with and without the excision repair inhibitor caffeine present. Others have observed that lethality, mutation, and the production of pyrimidine dimers show much the same wavelength dependence as DNA absorption. The results presented here demonstrate several action spectra which deviate from the DNA absorption spectra. Ultraviolet sensitization ratios (repair competent/repair defective) were also examined and were shown to change over the wavelength range. These findings suggest that DNA may not be the only important chromophore leading to cell death in the uv wavelength range studied. Since uv-B is of major importance in solar uv damage, these findings may also yield important implications for solar uv studies.

  8. Closure Report for Corrective Action Unit 254: Area 25, R-MAD Decontamination Facility, Nevada Test Site, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    G. N. Doyle

    2002-02-01

    Corrective Action Unit (CAU) 254 is located in Area 25 of the Nevada Test Site (NTS), approximately 100 kilometers (km) (62 miles) northwest of Las Vegas, Nevada. The site is located within the Reactor Maintenance, Assembly and Disassembly (R-MAD) compound and consists of Building 3126, two outdoor decontamination pads, and surrounding areas within an existing fenced area measuring approximately 50 x 37 meters (160 x 120 feet). The site was used from the early 1960s to the early 1970s as part of the Nuclear Rocket Development Station program to decontaminate test-car hardware and tooling. The site was reactivated in the early 1980s to decontaminate a radiologically contaminated military tank. This Closure Report (CR) describes the closure activities performed to allow un-restricted release of the R-MAD Decontamination Facility.

  9. A clinico-radiological study on 254 cases of pontine high signals on magnetic resonance imaging in relation to brain stem semiology

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, Masaki; Takahashi, Akira (Nagoya Univ. (Japan). Faculty of Medicine); Arahata, Yutaka; Motegi, Yoshimasa; Furuse, Masahiro

    1993-11-01

    A total of 254 patients who were proved to have pontine high intensity areas on T[sub 2]-weighted magnetic resonance imaging (MRI) were analyzed in relation to brain stem semiology. A comparative study on MRI and MR angiography was made between 254 patients with pontine high signals and 276 control cases showing no abnormality either on T[sub 1] or T[sub 2]-weighted images. Of the 254 patients, 62 had transient subjective complaints such as vertigo-dizziness. Supratentorial high signals, basilar artery tortuousness and vertebral artery asymmetry on MR angiography were seen more frequently in patients with pontine high signals than in the controls. In conclusion, pontine high signals may result from diffuse arteriosclerosis and MR angiography is considered to be a useful screening method. (author).

  10. Pharmacokinetic correlation between experimental and clinical effects on human non-small cell lung cancers of cis-diammineglycolatoplatinum (254-S) and cis-diamminedichloroplatinum.

    Science.gov (United States)

    Koenuma, M; Kasai, H; Uchida, N; Wada, T; Hattori, M; Oguma, T; Totani, T; Inaba, M

    1995-01-01

    We attempted to correlate the in vitro and in vivo antitumor activities of cis-diammineglycolatoplatinum (254-S), a novel platinum complex, and cis-diamminedichloro-platinum (CDDP) against the established culture cell lines and xenografts of human non-small cell lung cancer (NSCLC) with their clinical effects, based on the previous finding that the cytotoxicity of CDDP depends on the area under the curve (AUC). The concentration of 254-S and CDDP inhibiting the in vitro growth of 4 cultured NSCLC lines by 50% (IC50) was 0.82-7.8 and 0.53-4.2 micrograms/ml, respectively, showing a similar level. Of the 4 cell lines, only the most sensitive line, RERF-LC-AI, showed an IC50 close to a specific concentration (0.50 for 254-S and 0.32 micrograms/ml for CDDP) that reproduces in vitro the clinical AUCfree (24.8 and 5.34 micrograms-hr/ml) of the respective drugs. We treated 6 lines of human NSCLC xenografts implanted in nude mice with 254-S and CDDP at a particular dose (13.2 and 3.7 mg/kg) that is equivalent to the clinical doses with respect to the plasma AUCfree. 254-S and CDDP exhibited significant antitumor effects on 2 and 1 of the 6 lines, respectively. These in vitro and in vivo findings were considered to be relatively well correlated with the reported clinical response rates of 15-19% for 254-S and 14-15% for CDDP.

  11. Destruction of cyanobacterial toxin cylindrospermopsin by hydroxyl radicals and sulfate radicals using UV-254 nm activation of hydrogen peroxide, persulfate and peroxymonosulfate

    Science.gov (United States)

    Abstract: With increasing worldwide incidence of toxic cyanobacterial blooms in bodies of water, cylindrospermopsin (CYN) has become a significant concern to public health and water management officials. In this study, the removal of CYN by UV-254 nm-mediated advanced oxidation ...

  12. Corrective Action Decision Document for Corrective Action Unit 254: Area 25 R-MAD Decontamination Facility, Nevada Test Site, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    U.S. Department of Energy, Nevada Operations Office

    2000-06-01

    This Corrective Action Decision Document identifies and rationalizes the US Department of Energy, Nevada Operations Office's selection of a recommended corrective action alternative (CAA) appropriate to facilitate the closure of Corrective Action Unit (CAU) 254, R-MAD Decontamination Facility, under the Federal Facility Agreement and Consent Order. Located in Area 25 at the Nevada Test Site in Nevada, CAU 254 is comprised of Corrective Action Site (CAS) 25-23-06, Decontamination Facility. A corrective action investigation for this CAS as conducted in January 2000 as set forth in the related Corrective Action Investigation Plan. Samples were collected from various media throughout the CAS and sent to an off-site laboratory for analysis. The laboratory results indicated the following: radiation dose rates inside the Decontamination Facility, Building 3126, and in the storage yard exceeded the average general dose rate; scanning and static total surface contamination surveys indicated that portions of the locker and shower room floor, decontamination bay floor, loft floor, east and west decon pads, north and south decontamination bay interior walls, exterior west and south walls, and loft walls were above preliminary action levels (PALs). The investigation-derived contaminants of concern (COCs) included: polychlorinated biphenyls, radionuclides (strontium-90, niobium-94, cesium-137, uranium-234 and -235), total volatile and semivolatile organic compounds, total petroleum hydrocarbons, and total Resource Conservation and Recovery Act (Metals). During the investigation, two corrective action objectives (CAOs) were identified to prevent or mitigate human exposure to COCs. Based on these CAOs, a review of existing data, future use, and current operations at the Nevada Test Site, three CAAs were developed for consideration: Alternative 1 - No Further Action; Alternative 2 - Unrestricted Release Decontamination and Verification Survey; and Alternative 3 - Unrestricted

  13. Photodegradation of the azole fungicide fluconazole in aqueous solution under UV-254: kinetics, mechanistic investigations and toxicity evaluation.

    Science.gov (United States)

    Chen, Zhi-Feng; Ying, Guang-Guo; Jiang, Yu-Xia; Yang, Bin; Lai, Hua-Jie; Liu, You-Sheng; Pan, Chang-Gui; Peng, Fu-Qiang

    2014-04-01

    The azole fungicide fluconazole has been reported to be persistent in conventional wastewater treatment plants. This study investigated the photodegradation of fluconazole under UV-254 in aqueous solutions. The results revealed that the photodegradation of fluconazole was pH-dependent (2.0-12.0) following the pseudo-first-order kinetics with quantum yield values ranging from 0.023 to 0.090 mol einstein(-1), and it underwent a direct and self-sensitized mechanism involving (1)O2. The main photodegradation by-products were identified and semi-quantitated. The proposed photodegradation pathway included hydroxylative defluorination reaction. The 72 h-NOEC and 72 h-LOEC values for fluconazole using a freshwater unicellular green alga Pseudokirchneriella subcapitata were 10 μM and 15 μM. Overall, the photodegradation of fluconazole produced a significant decrease in algal toxicity. It also proved that the photodegradation by-products will not present extra toxicity to this alga than fluconazole itself.

  14. Star formation in the filament of S254-S258 OB complex: a cluster in the process of making

    CERN Document Server

    Samal, M R; Jose, J; Zavagno, A; Takahashi, S; Neichel, B; Kim, J S; Chauhan, N; Pandey, A K; Zinchenko, I; Tamura, M; Ghosh, S K

    2015-01-01

    Infrared Dark Clouds are ideal laboratories to study the initial processes of high-mass star and star cluster formation. We investigated star formation activity of an unexplored filamentary dark cloud (~5.7pc x 1.9pc), which itself is part of a large filament (~20pc) located in the S254-S258 OB complex at a distance of 2.5kpc. Using MIPS Spitzer 24 micron data, we uncover 49 sources with SNR greater than 5. We identified 45 sources as candidate YSOs of Class I, Flat-spectrum & Class II nature. Additional 17 candidate YSOs (9 Class I & 8 Class II) are also identified using JHK and WISE photometry. We find that the protostar to Class II sources ratio (~2) and the protostar fraction (~70%) of the region are high. When the protostar fraction compared to other young clusters, it suggests that the star formation in the dark cloud was possibly started only 1 Myr ago. Combining the NIR photometry of the YSO candidates with the theoretical evolutionary models, we infer that most of the candidate YSOs formed in...

  15. Clinical characteristics of 254 cases of polypoidal choroidal vasculopathy%254例息肉样脉络膜血管病变的临床特征分析

    Institute of Scientific and Technical Information of China (English)

    陶勇; 侯婧; 黎晓新

    2012-01-01

    变(PCV)的临床特征.方法 回顾性分析254例临床确诊的PCV患者306只眼的临床资料.所有患者均行矫正视力、裂隙灯显微镜、间接检眼镜、眼底彩色照相、荧光素眼底血管造影、吲哚青绿血管造影以及光相干断层扫描检查(OCT).结果 254例患者中,男性152例,占59.8%;女性102例,占40.2%.年龄38~91岁,平均年龄(65.4±8.9)岁.双眼52例,占20.5%;单眼202例,占79.5%.患眼矫正视力无光感~1.2.其中,矫正视力<0.1者167只眼,占54.6%;≥0.1且<0.3者92只眼,占30.1%;≥0.3者47只眼,占15.4%.有玻璃体积血61只眼,占19.9%.202例单眼PCV患者中,另眼可见玻璃膜疣68例,占33.7%;渗出型老年性黄斑变性24例,占11.9%;对侧眼有中心性浆液性脉络膜视网膜病变病史9例,占4.5%.306只眼中,可见脉络膜高通透性表现43只眼,占14.1%.PCV病变位于黄斑区下1 99只眼,占65.0%;颞侧视网膜血管弓下49只眼,占16.0%;视盘旁15只眼,占4.9%.形态表现为孤立样110只眼,占35.9%;簇样176只眼,占57.5%;串样3只眼,占1.0%;分支样4只眼,占1.3%;既有孤立样同时也有簇样13只眼,占4.2%.存在神经视网膜下液性暗区125只眼,占40.8%;出血性视网膜色素上皮脱离121只眼,占39.5%;浆液性视网膜色素上皮脱离73只眼,占22.9%.结论 PCV双眼发病率、女性患病比例较高;病灶位于视盘旁比例较低.

  16. Case study: Nutrition and hydration status during 4,254 km of running over 78 consecutive days.

    Science.gov (United States)

    Dempster, Sarah; Britton, Rhiannon; Murray, Andrew; Costa, Ricardo J S

    2013-10-01

    The aims of this study were to assess the dietary intake and monitor self-reported recovery quality and clinical symptomology of a male ultra-endurance runner who completed a multiday ultra-endurance running challenge covering 4,254 km from North Scotland to the Moroccan Sahara desert over 78 consecutive days. Food and fluid intakes were recorded and analyzed through dietary analysis software. Body mass (BM) was determined before and after running each day, and before sleep. Clinical symptomology and perceived recovery quality were recorded each day. Whole blood hemoglobin and serum ferritin were determined before and after the challenge. Total daily energy (mean ± SD: 23.2 ± 3.2 MJ · day(-1)) and macronutrient intake (182 ± 31 g · day(-1) protein, 842 ± 115 g · day(-1) carbohydrate, 159 ± 55 g · day(-1) fat) met consensus nutritional guidelines for endurance performance. Total daily water intake through foods and fluids was 4.8 ± 2.0 L · day(-1). Water and carbohydrate intake rates during running were 239 ± 143 ml · h(-1) and 56 ± 19 g · h(-1), respectively. Immediately after running, carbohydrate and protein intakes were 1.3 ± 1.0 g · kg BM(-1) and 0.4 ± 0.2 g · kg BM(-1), respectively. Daily micronutrient intakes ranged from 109 to 662% of UK RNIs. Prerunning BM was generally maintained throughout. Overall exercise-induced BM loss averaged 0.8 ± 1.0%; although BM losses of ≥ 2% occurred in the latter stages, a reflection of the warmer climate. Varying degrees of self-reported perceived recovery quality and clinical symptomology occurred throughout the challenge. This case study highlights oscillations in dietary habits along 78 consecutive days of ultra-endurance running, dependent on changes in ambient conditions and course topography. Nevertheless, nutrition and hydration status were maintained throughout the challenge. Despite dietary iron intake above RNI and iron supplementation, this alone did not prevent deficiency symptoms.

  17. Fatores prognósticos da doença meningocócica: estudo relativo a 254 casos Prognostic factors of meningococcic meningitis: a study of 254 cases

    Directory of Open Access Journals (Sweden)

    Tercílio Luiz Turini

    1979-09-01

    Full Text Available Analisa-se, em relação a 254 casos de doença meningocócica, a variação da letalidade sob a influência dos seguintes fatores que, segundo a literatura, agravam-lhe o prognóstico: grupos de idade extrema, tempo curto de história antes da admissão, presença de púrpuras e/ou petéquias na admissão, ocorrência de choque ou de coma, número de leucócitos normal ou diminuído no sangue periférico na admissão, líquido cefalorraquidiano normal na admissão, número de leucócitos normal ou diminuído no sangue periférico na admissão, número de leucócitos menor que 100/mm³, proteinorraquia maior que 300 mg/dl, ou glicorraquia menor que 10 mg/dl, no líquido cefalorraquidiano colhido na admissão. Dentre esses fatores, aqueles para os quais se demonstrou influência estatisticamente significativa sobre a letalidade foram: 1 idades extremas: maior letalidade em crianças com menos de um ano de idade e em adultos com mais de 40 anos; 2 tempo de história, antes da admissão hospitalar, menor que 48 horas; 3 presença de coma ou 4 choque na admissão; 5 número de leucócitos, no sangue periférico colhido na admissão, igual ou menor que 10.000/mm³. A combinação desses fatores evidenciou que, quanto maior o número deles associados, mais alto o índice de letalidade.Two hundred and fifty-four cases of acute meningococcic meningitis at the hospital of the University of Londrina, Paraná (Brazil, between 1972 and 1976, were analyzed to determine the lethality of nine prognostic factors, which, according to literature, are said to aggravate the prognosis, namely: age, the period of time the patient has had the disease before admission, petechial and purpuric lesions of the skin, shock, coma, reduced number of leucocytes in peripherical blood, normal cerebrospinal fluid (c.s.f. on admission, leucocyte number in c.s.f. lower than 100/mm³, protein concentration in c.s.f. higher than 300 mg/dl and glucose concentration in c.s.f. lower

  18. Compte rendu de: Maggie Morrow, Mike Morrow, Tony Judd, & Geoff Phillipson 2010. Desert RATS. Rock Art Topographical Survey in Egypt's Eastern Desert. Oxford: BAR International Series 2166, 254 p.

    OpenAIRE

    Le Quellec, Jean-Loïc

    2011-01-01

    International audience; Compte rendu de: Maggie Morrow, Mike Morrow, Tony Judd, & Geoff Phillipson 2010. Desert RATS. Rock Art Topographical Survey in Egypt's Eastern Desert. Oxford: BAR International Series 2166, 254 p.

  19. Chemical, optical and other data collected aboard the THOMAS G. THOMPSON during cruise TN254 in the Coastal Waters of SE Alaska and North Pacific Ocean from 2010-09-09 to 2010-10-11 (NODC Accession 0104359)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0104359 includes chemical, optical and other data collected aboard the THOMAS G. THOMPSON during cruise TN254 in the Coastal Waters of SE Alaska and...

  20. Validation of an RPHPTLC-Densitometric Method Using Silica Gel 60 RP18WF254 for Simultaneous Determination of Nicotinamide in Selected Pharmaceutical Formulations

    OpenAIRE

    Małgorzata Dołowy; Alina Pyka

    2015-01-01

    This research study describes the applicability of silica gel 60 RPW18F254 plates for the development and validation of new, simple, economic, accurate, and precise RPHPTLC-densitometric method suitable for the quantification of nicotinamide (as Vitamin PP) in three marketed preparations. The mobile phase used was methanol-water in volume composition 3 : 7. Detection wavelength was 200 nm. The proposed method was validated according to ICH guidelines and also based on Ferenczi-Fodor and Konie...

  1. Surface modification of Sylgard 184 polydimethylsiloxane by 254 nm excimer radiation and characterization by contact angle goniometry, infrared spectroscopy, atomic force and scanning electron microscopy

    Science.gov (United States)

    Waddell, Emanuel A.; Shreeves, Stephen; Carrell, Holly; Perry, Christopher; Reid, Branden A.; McKee, James

    2008-06-01

    The modification of polydimethylsiloxane (PDMS) by narrow band 254 nm excimer radiation under a nitrogen atmosphere was characterized by contact angle goniometry, attenuated total reflectance infrared spectroscopy, atomic force and scanning electron microscopy. UV irradiation results in the formation of the carboxylic acids that influences the wettability of the surface. Continued exposure results in the formation of an inorganic surface (SiO x (1 < x < 2)) which hinders the ability to continually increase the wettability. The continuity of this inorganic layer is disrupted by the formation of surface cracks. These results have implications in the fabrication and chemical modification of microfluidic or micro-electro-mechanical systems.

  2. Surface modification of Sylgard 184 polydimethylsiloxane by 254 nm excimer radiation and characterization by contact angle goniometry, infrared spectroscopy, atomic force and scanning electron microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Waddell, Emanuel A. [University of Alabama in Huntsville, Huntsville, AL (United States)], E-mail: ewaddell@chemistry.uah.edu; Shreeves, Stephen [University of Alabama in Huntsville, Huntsville, AL (United States); Carrell, Holly; Perry, Christopher [Oakwood College, Huntsville, AL (United States); Reid, Branden A. [Morgan State University, Baltimore, MD (United States); McKee, James [University of Alabama in Birmingham, Birmingham, AL (United States)

    2008-06-30

    The modification of polydimethylsiloxane (PDMS) by narrow band 254 nm excimer radiation under a nitrogen atmosphere was characterized by contact angle goniometry, attenuated total reflectance infrared spectroscopy, atomic force and scanning electron microscopy. UV irradiation results in the formation of the carboxylic acids that influences the wettability of the surface. Continued exposure results in the formation of an inorganic surface (SiO{sub x} (1 < x < 2)) which hinders the ability to continually increase the wettability. The continuity of this inorganic layer is disrupted by the formation of surface cracks. These results have implications in the fabrication and chemical modification of microfluidic or micro-electro-mechanical systems.

  3. Heme oxygenase-1 is involved in nitric oxide- and cGMP-induced α-Amy2/54 gene expression in GA-treated wheat aleurone layers.

    Science.gov (United States)

    Wu, Mingzhu; Wang, Fangquan; Zhang, Chen; Xie, Yanjie; Han, Bin; Huang, Jingjing; Shen, Wenbiao

    2013-01-01

    Here, α-Amy2/54 gene expression was used as a molecular probe to investigate the interrelationship among nitric oxide (NO), cyclic GMP (cGMP), and heme oxygenase-1 (HO-1) in GA-treated wheat aleurone layers. The inducible expressions of α-Amy2/54 and α-amylase activity were respectively amplified by two NO-releasing compounds, sodium nitroprusside (SNP) and spermine NONOate, in a GA-dependent fashion. Similar responses were observed when an inducer of HO-1, hemin-or one of its catalytic products, carbon monoxide (CO) in aqueous solution-was respectively added. The SNP-induced responses, mimicked by 8-bromoguanosine 3',5'-cyclic monophosphate (8-Br-cGMP), a cGMP derivative, were NO-dependent. This conclusion was supported by the fact that endogenous NO overproduction was rapidly induced by SNP, and thereafter induction of α-Amy2/54 gene expression and increased α-amylase activity were sensitive to the NO scavenger. We further observed that the above induction triggered by SNP and 8-Br-cGMP was partially prevented by zinc protoporphyrin IX (ZnPPIX), an inhibitor of HO-1. These blocking effects were clearly reversed by CO, confirming that the above response was HO-1-specific. Further analyses showed that both SNP and 8-Br-cGMP rapidly up-regulated HO-1 gene expression and increased HO activity, and SNP responses were sensitive to cPTIO and the guanylate cyclase inhibitor 6-anilino-5,8-quinolinedione (LY83583). Molecular evidence confirmed that GA-induced GAMYB and ABA-triggered PKABA1 transcripts were up-regulated or down-regulated by SNP, 8-Br-cGMP or CO cotreated with GA. Contrasting changes were observed when cPTIO, LY83583, or ZnPPIX was added. Together, our results suggested that HO-1 is involved in NO- and cGMP-induced α-Amy2/54 gene expression in GA-treated aleurone layers.

  4. Revealing the "missing" low-mass stars in the S254-S258 star forming region by deep X-ray imaging

    CERN Document Server

    Mucciarelli, Paola; Zinnecker, Hans

    2011-01-01

    (abbreviated) In the central part of the S254-S258 star forming complex, a dense embedded cluster of very young stellar objects (S255-IR) is sandwiched between the two HII regions S255 and S257. This interesting configuration had led to different speculations such as dynamical ejection of the B-stars from the central cluster or triggered star formation in a cloud that was swept up in the collision zone between the two expanding HII regions. The presence or absence of low-mass stars associated with these B-stars can discriminate between the possible scenarios. We performed a deep Chandra X-ray observation of the S254-S258 region in order to efficiently discriminate young stars from the numerous older field stars in the area. We detected 364 X-ray point sources, providing a complete sample of all young stars in the observed region down to ~0.5 Msun. A clustering analysis identifies three significant clusters, containing 64 X-ray sources in total. After accounting for X-ray background contaminants, this implies ...

  5. Prospects of heavy and superheavy element production via inelastic nucleus-nucleus collisions - from 238U+238U to18O+254Es

    Science.gov (United States)

    Schädel, Matthias

    2016-12-01

    Multi-nucleon transfer reactions, frequently termed deep-inelastic, between heavy-ion projectiles and actinide targets provide prospects to synthesize unknown isotopes of heavy actinides and superheavy elements with neutron numbers beyond present limits. The 238U on 238U reaction, which revealed essential aspects of those nuclear reactions leading to surviving heavy nuclides, mainly produced in 3n and 4n evaporation channels, is discussed in detail. Positions and widths of isotope distributions are compared. It is shown, as a general rule, that cross sections peak at irradiation energies about 10% above the Coulomb barrier. Heavy target nuclei are essential for maximizing cross sections. Experimental results from the 238U on 248Cm reaction, including empirical extrapolations, are compared with theoretical model calculations predicting relatively high cross sections for neutron-rich nuclei. Experiments to test the validity of such predictions are proposed. Comparisons between rather symmetric heavy-ion reactions like 238U on 248Cm (or heavier targets up to 254Es) with very asymmetric ones like 18O on 254Es reveal that the ones with 238U as a projectile have the highest potential in the superheavy element region while the latter ones can be advantageous for the synthesis of heavy actinide isotopes. Concepts for highly efficient recoil separators designed for transfer products are presented.

  6. Abundancias químicas de la compañera visible del agujero negro binario V4641 Sgr (XTE J1819-254)

    Science.gov (United States)

    Cúneo, V. A.; Jofré, E.; Pintado, O. I.; Gómez, M. N.

    2015-08-01

    In this work we expose an analysis of the chemical abundances of the optical companion of the confirmed black hole binary V4641 Sgr (XTE J1819-254) from GMOS spectra obtained with the Gemini North telescope. This analysis allowed to observe an enhancement of N, O, Mg and Si, attributed to the contamination of heavy elements generated during the supernova explosion that gave birth to the black hole. It was also observed that Cr and Fe were subabundant. The aim of this study is to test the formation scenario of a binary system containing a black hole as remnant of the supernova explosion of a massive star, and to provide information to better understand the final stages in the evolution of massive stars and black hole progenitors.

  7. ONKALO pose experiment. Geophysical logging and imaging of drillholes ONK-PP223, ONK-PP226, ONK-PP254 and ONK-PP259...261

    Energy Technology Data Exchange (ETDEWEB)

    Tarvainen, A.-M. (Suomen Malmi Oy, Espoo (Finland))

    2011-08-15

    Suomen Malmi Oy conducted geophysical drillhole logging as well as optical and acoustic imaging of shallow drillholes ONK-PP223, ONK-PP226, ONK-PP254, ONKPP259, ONK-PP260 and ONK-PP261 at ONKALO in the investigation niche ONKTKU- 3 (POSE) between December 2009 and June 2010. The survey is a part of Posiva Oy's detailed investigation program for the final disposal of spent nuclear fuel. The assignment included the field work and data processing. The report describes field operation, equipment as well as processing procedures and shows the obtained results and an analysis of their quality in the appendices. The raw and processed data are delivered digitally in WellCAD, PDF and Excel format. (orig.)

  8. The Effects of Short Wave UV Irradiation (254-366nm on Color Values of Recycled and Bleached ONP/OMP Pulps

    Directory of Open Access Journals (Sweden)

    Emrah Peşman

    2011-04-01

    Full Text Available ABSTRACT As it is known, mechanical pulp papers include significant amount of lignin and carbohydrates as well as cellulose. Thus, when these lignin reach papers irradiated with short wave UV light they could not protect their color. In this study, bleaching of ONP/OMG recycled pulps with hydrogen peroxide, sodium percarbonate, sodium dithyonite, sodium borohydride and formamidin sulfunic acid were performed. Then the test papers of these pulps were irradiated with 254-366nm UV light and changes in the ISO Brightness, CIE L*a*b*, yellowness (YI and whiteness (WI values were observed. At the result of study, all bleaching agents were determined as insufficient in the respect of color stability. But if they compared with each other, the two stages sodium percarbonate-sodium borohydride bleaching sequence was gave the best results against to color reversion. Keywords: Old news/old magazine papers (ONP/OMG, Bleaching, Color Stability, UV Irradiation

  9. Analysis of epidemiologic and clinical features on 254 cases patients with hepatitis C YANGJie, China Medical Univercity,Shenyang,110000,China%254例慢性丙型肝炎流行病学及临床特征调查分析

    Institute of Scientific and Technical Information of China (English)

    杨杰; 崔敬; 刘春; 魏枫华; 窦晓光

    2012-01-01

    目的调查丙型肝炎的流行病学及临床特征.方法回顾分析254例丙型肝炎患者的流行病学和临床资料.结果在254例被调查的患者中,男性158例,女性96例,男:女=1.7:1;传播途径主要有应用血制品、注射针刺、性传播、母婴传播,拔牙或洗牙和不明原因等;有5例患者合并HBV或HIV感染;67例发展为失代偿期肝硬化;5例发展为肝细胞癌;13例并发2型糖尿病,12例并发自身免疫性疾病.结论近年来丙型肝炎的传播途径在不同年龄组,不同职业人群中有显著的不同,尤其是在青中年患者中以吸毒和性传播途径为主,应引起关注.%Objective To investigate the epidemiologic and clinical features of patients with hepatitis C in recent years. Methods 254 patients with hepatitis C were collected to analyse its epidemiologic and clinical features. Results In 254 patients with hepatitis C, there were 158 male(62.2%). The range of age was from 28 to 79 year-old ; The main transmission routes were blood product transfusion,injection,sexual , vertical and dentaltransmission. There was 1.96% of patients co-infected with hepatitis B and HIV.There were 26.38% with cirrhosis and 5.12% with 2-DM. There was 4.72%of patients co-infected with autoimmune diseases. Conclusions The hepatitis C has six routes of transmission in general, but the routes are not the same in different ages and in different jobs.

  10. Degradation and mineralization of organic UV absorber compound 2-phenylbenzimidazole-5-sulfonic acid (PBSA) using UV-254 nm/H{sub 2}O{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Abdelraheem, Wael H.M. [Chemistry Department, Faculty of Science, Sohag University, Sohag 82524 (Egypt); Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012 (United States); He, Xuexiang; Duan, Xiaodi [Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012 (United States); NIREAS-International Water Research Center, University of Cyprus, Nicosia 1678 (Cyprus); Dionysiou, Dionysios D., E-mail: dionysios.d.dionysiou@uc.edu [Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012 (United States); NIREAS-International Water Research Center, University of Cyprus, Nicosia 1678 (Cyprus)

    2015-01-23

    Graphical abstract: - Highlights: • UV-254 nm/H{sub 2}O{sub 2} AOP was utilized for the degradation and mineralization of PBSA and BSA. • Promotion of k{sub obs} with [H{sub 2}O{sub 2}]{sub 0} ≤ 4 mM and inhibition at higher [H{sub 2}O{sub 2}]{sub 0} were observed. • The S and N were released and monitored as SO{sub 4}{sup 2−} and NH{sub 4}{sup +}, respectively. • Br{sup −} inhibited both the degradation and mineralization much more significantly than Cl{sup −}. • There was an increase in [NH{sub 4}{sup +}] at higher [H{sub 2}O{sub 2}]{sub 0} and its further destruction at higher UV fluence. - Abstract: Various studies have revealed the non-biodegradable and endocrine disrupting properties of sulfonated organic UV absorbers, directing people's attention toward their risks on ecological and human health and hence their removal from water. In this study, UV-254 nm/H{sub 2}O{sub 2} advanced oxidation process (AOP) was investigated for degrading a model UV absorber compound 2-phenylbenzimidazole-5-sulfonic acid (PBSA) and a structurally similar compound 1H-benzimidazole-2-sulfonic acid (BSA), with a specific focus on their mineralization. At 4.0 mM [H{sub 2}O{sub 2}]{sub 0}, a complete removal of 40.0 μM parent PBSA and 25% decrease in TOC were achieved with 190 min of UV irradiation; SO{sub 4}{sup 2−} was formed and reached its maximum level while the release of nitrogen as NH{sub 4}{sup +} was much lower (around 50%) at 190 min. Sulfate removal was strongly enhanced by increasing [H{sub 2}O{sub 2}]{sub 0} in the range of 0–4.0 mM, with slight inhibition in 4.0–12.0 mM. Faster and earlier ammonia formation was observed at higher [H{sub 2}O{sub 2}]{sub 0}. The presence of Br{sup −} slowed down the degradation and mineralization of both compounds while a negligible effect on the degradation was observed in the presence of Cl{sup −}. Our study provides important technical and fundamental results on the HO{sup ·} based degradation and

  11. Photo-removal of sulfamethoxazole (SMX) by photolytic and photocatalytic processes in a batch reactor under UV-C radiation ({lambda}{sub max} = 254 nm)

    Energy Technology Data Exchange (ETDEWEB)

    Nasuhoglu, Deniz; Yargeau, Viviane [Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, Quebec, H3A 2B2 (Canada); Berk, Dimitrios, E-mail: dimitrios.berk@mcgill.ca [Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, Quebec, H3A 2B2 (Canada)

    2011-02-15

    In this study, photolytic and photocatalytic removal of the antibiotic sulfamethoxazole (SMX) under UVC radiation ({lambda} = 254 nm) was investigated. The light intensity distribution inside the batch photoreactor was characterized by azoxybenzene actinometry. The intensity of incident radiation was found to be a strong function of position inside the reactor. 12 mg L{sup -1} of SMX was completely removed within 10 min of irradiation under UVC photolysis, compared to 30 min under TiO{sub 2} photocatalysis. COD measurement was used as an indication of the mineralization efficiency of both processes and higher COD removal with photocatalysis was shown. After 6 h of reaction with photolysis and photocatalysis, 24% and 87% removal of COD was observed, respectively. Two of the intermediate photo-products were identified as sulfanilic acid and 3-amino-5-methylisoxazole by direct comparison of the HPLC chromatograms of standards to those of treated solutions. Ecotoxicity of treated and untreated solutions of SMX towards Daphnia magna was also investigated. It was found that a 3:1 ratio of sample to standard freshwater and a high initial concentration of 60 mg L{sup -1} of SMX were used to obtain reliable and reproducible results. The photo-products formed during photocatalytic and photolytic processes were shown to be generally more toxic than the parent compound.

  12. Degradation and mineralization of organic UV absorber compound 2-phenylbenzimidazole-5-sulfonic acid (PBSA) using UV-254nm/H2O2.

    Science.gov (United States)

    Abdelraheem, Wael H M; He, Xuexiang; Duan, Xiaodi; Dionysiou, Dionysios D

    2015-01-23

    Various studies have revealed the non-biodegradable and endocrine disrupting properties of sulfonated organic UV absorbers, directing people's attention toward their risks on ecological and human health and hence their removal from water. In this study, UV-254nm/H2O2 advanced oxidation process (AOP) was investigated for degrading a model UV absorber compound 2-phenylbenzimidazole-5-sulfonic acid (PBSA) and a structurally similar compound 1H-benzimidazole-2-sulfonic acid (BSA), with a specific focus on their mineralization. At 4.0mM [H2O2]0, a complete removal of 40.0μM parent PBSA and 25% decrease in TOC were achieved with 190min of UV irradiation; SO4(2-) was formed and reached its maximum level while the release of nitrogen as NH4(+) was much lower (around 50%) at 190min. Sulfate removal was strongly enhanced by increasing [H2O2]0 in the range of 0-4.0mM, with slight inhibition in 4.0-12.0mM. Faster and earlier ammonia formation was observed at higher [H2O2]0. The presence of Br(-) slowed down the degradation and mineralization of both compounds while a negligible effect on the degradation was observed in the presence of Cl(-). Our study provides important technical and fundamental results on the HO based degradation and mineralization of SO3H and N-containing UV absorber compounds.

  13. The minimal domain of adipose triglyceride lipase (ATGL ranges until leucine 254 and can be activated and inhibited by CGI-58 and G0S2, respectively.

    Directory of Open Access Journals (Sweden)

    Irina Cornaciu

    Full Text Available Adipose triglyceride lipase (ATGL is the rate-limiting enzyme of lipolysis. ATGL specifically hydrolyzes triacylglycerols (TGs, thereby generating diacylglycerols and free fatty acids. ATGL's enzymatic activity is co-activated by the protein comparative gene identification-58 (CGI-58 and inhibited by the protein G0/G1 switch gene 2 (G0S2. The enzyme is predicted to act through a catalytic dyad (Ser47, Asp166 located within the conserved patatin domain (Ile10-Leu178. Yet, neither an experimentally determined 3D structure nor a model of ATGL is currently available, which would help to understand how CGI-58 and G0S2 modulate ATGL's activity. In this study we determined the minimal active domain of ATGL. This minimal fragment of ATGL could still be activated and inhibited by CGI-58 and G0S2, respectively. Furthermore, we show that this minimal domain is sufficient for protein-protein interaction of ATGL with its regulatory proteins. Based on these data, we generated a 3D homology model for the minimal domain. It strengthens our experimental finding that amino acids between Leu178 and Leu254 are essential for the formation of a stable protein domain related to the patatin fold. Our data provide insights into the structure-function relationship of ATGL and indicate higher structural similarities in the N-terminal halves of mammalian patatin-like phospholipase domain containing proteins, (PNPLA1, -2,- 3 and -5 than originally anticipated.

  14. Effects of UVC254 nm on the photosynthetic activity of photobionts from the astrobiologically relevant lichens Buellia frigida and Circinaria gyrosa

    Science.gov (United States)

    Meeßen, J.; Backhaus, T.; Sadowsky, A.; Mrkalj, M.; Sánchez, F. J.; de la Torre, R.; Ott, S.

    2014-10-01

    In the past decade, various astrobiological studies on different lichen species investigated the impairment of viability and photosynthetic activity by exposure to simulated or real space parameters (as vacuum, polychromatic ultraviolet (UV)-radiation and monochromatic UVC) and consistently found high post-exposure viability as well as low rates of photosynthetic impairment (de Vera et al. 2003, 2004a; 2004b; de la Torre et al. 2010; Onofri et al. 2012; Sánchez et al. 2012, 2014; Brandt et al. 2014). To achieve a better understanding of the basic mechanisms of resistance, the present study subdued isolated and metabolically active photobionts of two astrobiologically relevant lichens to UVC254 nm, examined its effect on photosynthetic activity by chlorophyll a fluorescence and characterized the UVC-induced damages by quantum yield reduction and measurements of non-photochemical quenching. The results indicate a strong impairment of photosynthetic activity, photoprotective mechanisms and overall photobiont vitality when being irradiated in the isolated and metabolically active state. In conclusion, the present study stresses the higher susceptibility of photobionts towards extreme environmental conditions as UVC-exposure, a stressor that does not occur on the Earth. By comparison with previous studies, the present results highlight the importance of protective mechanisms in lichens, such as morphological-anatomical traits (Meeßen et al. 2013), secondary lichen compounds (Meeßen et al. 2014) and the symbiont's pivotal ability to pass into anhydrobiosis when desiccating.

  15. Degradation of dibutyl phthalate (DBP) by UV-254 nm/H2O2 photochemical oxidation: kinetics and influence of various process parameters.

    Science.gov (United States)

    Wang, Dong; Duan, Xiaodi; He, Xuexiang; Dionysiou, Dionysios D

    2016-12-01

    Degradation of dibuytl phthalate (DBP), a plasticizer and also a widely distributed endocrine disruptor, by UV-254 nm/H2O2 advanced oxidation process (AOP) was investigated in this study. A significant DBP removal of 77.1 % at an initial concentration of 1.0 μM was achieved at UV fluence of 160 mJ/cm(2), initial H2O2 dosage of 1.0 mM, and pH of 7.6 ± 0.1. The DBP degradation exhibited a pseudo-first-order reaction kinetic pattern, with the rate constants linearly increasing with increasing H2O2 dosage while decreasing with increasing initial DBP concentration and pH value in a specific range. DBP destruction was significantly inhibited in the presence of alkalinity and natural organic matter (NOM), two known factors that should be taken a serious consideration of in the research and design of UV/H2O2-based AOPs. Presence of common inorganic anions (i.e., Cl(-), SO4(2-), and NO3(-)) and metal cations (i.e., Fe(3+) and Zn(2+)) had a slight impact on the degradation of DBP, although Cu(2+) could improve the degradation efficiency even at a concentration as low as 0.01 mg/L, suggesting a strong potential of applying UV/H2O2 for the removal of DBP with an environmental relevant level of copper.

  16. W-reactivation and W-mutagenesis in bacteriophages lambda and T7: comparison of action of ultraviolet irradiation (254nm) and furocouma photosensitization

    Energy Technology Data Exchange (ETDEWEB)

    Zavil' gel' skij, G.B.; Belogurov, A.A.; Kryuger, D.N. (AN SSSR, Moscow. Inst. Molekulyarnoj Biologii; Humboldt-Universitaet, Berlin (German Democratic Republic))

    1982-01-01

    When treating bacteriophage lambda with 8-methoxypsoralen (8-MOP) and light (lambda>320 nm), two types of photoproducts are formed in DNA: monoadducts and diadducts or interstrand linkings. If a wild-type strain of Escherichia coli is used as host, W-reactivation and W-mutagenesis (clear-mutation), approximately equal in magnitude to those of UV-irradiated phage lambda, are observed in the bacteriophage lambda treated with 8-MOP plus light. If mutant strains E coli uvrA/sup -/, recA/sup -/ and lexA/sup -/ are used as host W-reactivation and W-mutagenesis practically do not occur in phage lambda. Using the method of ''reirradiation'', it is shown that clear-mutations in 8-MOP plus light treated phage lambda are induced in the process of W-mutagenesis mainly due to the formation of diadducts (interstrand linking) in DNA. In the phage monoadducts of derived furocoumarins also have a mutageneous character but their mutagenesis effectiveness (mutation probability calculating on one photo product) is significantly inferior to that of diadducts (approximately 15-20 times). It has been demonstrated in the experiments on the determination of W-mutagenesis of phage lambda photosensitized with angelisine - an angular derivative of furocoumarins - that mainly form monoadducts in DNA. It is also shown that W-reactivation and W-mutagenesis effects are observed when sowing UV-irradiated (254 nm) phage lambda on E coli uvrA/sup -/ and wild-type strains treated with 8-MOP plus light. As to bacteriophage T7 treated with 8-MOP plus light, W-reactivation is not observed even on a wild strain E coli. Preliminary infection of cells with phage T7 that has been strongly inactivated using photosensitizer 8-MOP decreases repair's effectiveness of interstrand linkings in DNA of phage lambda.

  17. Effect of Key Parameters on the Photocatalytic Oxidation of Toluene at Low Concentrations in Air under 254 + 185 nm UV Irradiation

    Energy Technology Data Exchange (ETDEWEB)

    Quici, Natalia; Vera, Maria L.; Choi, Hyeok; Puma, Gianluca Li; Dionysiou, Dionysios D.; Litter, Marta I.; Destaillats, Hugo

    2009-07-01

    The effect of key experimental parameters on the removal of toluene under 254 + 185 nm irradiation was investigated using a benchtop photocatalytic flow reactor. Toluenewas introduced at low concentrations between 10 and 500 ppbv, typical of indoorenvironments, and reacted on TiO2-coated Raschig rings. Two different TiO2-coated rings were prepared: in one case, by dip-coating using a P25 aqueous suspension and, on the other, using an organic/inorganic sol-gel method that produced thin films of mesoporous anatase. Flow rates in the photoreactor varied between 4 L min-1 and 125 mL min-1, leading to residence times in the range 100 ms< tau< 2 s. For these conditions, toluene removal efficiencies were between 30 and 90percent, indicating that the system did not achieve total conversion in any case. For each air flow rate, the conversion oftoluene was significantly higher when the reactor length was 10 cm, as compared with 5 cm; however, only marginal increases in conversions were achieved in the two reactor lengths at equal residence time and different concentration of toluene, suggesting that that the reactor is effectively behaving as an ideal reactor and that the reaction is first-order in the concentration of toluene. Experiments were carried out between 0 and 66percent relative humidity (RH), the fastest reaction rate being observed at moderately low humidity conditions (10percent RH), with respect to both dry air and higher humidity levels. Formaldehyde was formed as a partial oxidation byproduct at low and at high residence times (240 and 960 ms), although higher formaldehyde molar yields (up to 20percent) were observed at low tau (240 ms) and moderate humidity conditions (10 and 33percent), suggesting that both tau and RH can be optimized toreduce the formation of harmful intermediates. Toluene removal efficiency increased with the TiO2 thickness (i.e., mass) until a maximum value of 500 nm, beyond which the removal efficiency decreased. This should be

  18. Paired observation of californium-252 neutron intraluminal brachytherapy combined with external-beam radiotherapy with and without lead shielding for cervical cancer%252 Cf中子腔内照射结合挡铅与不挡铅外照射治疗宫颈癌的配对观察

    Institute of Scientific and Technical Information of China (English)

    戴卓捷; 雷新; 陈永红; 刘佳

    2015-01-01

    目的:比较252 Cf中子腔内照射结合挡铅盆腔对穿野和不挡铅箱式四野外照射治疗宫颈癌的治疗结果。方法2004—2007年本院收治的Ⅱa—Ⅲb 期的宫颈鳞癌患者,按照临床分期、年龄、肿瘤大小、贫血程度为配对条件,共筛选出26对(52例)研究对象,分为挡铅盆腔对穿野组(挡铅组)和不挡铅箱式四野组(不挡铅组)。两组患者外照射期间穿插252 Cf中子后装治疗。 Kaplan?Meier法计算5年LC、OS、DFS 并 Logrank 检验差异,晚期并发症发生率差异行 McNemar 法检验。结果挡铅、不挡铅组5年LC 率分别为85%、81%(P=0??014),OS 率分别为89%、73%(P=0??013),DFS 率分别为89%、73%(P=0??013),晚期并发症发生率分别为12%、23%(P=0??008)。结论腔内照射结合外照射治疗宫颈癌时无论采取对穿野还是箱式四野,后程前后野中央均应挡铅。%Objective To compare the efficacy between californium?252 ( 252 Cf ) neutron intraluminal brachytherapy combined with external?beam radiotherapy with lead?shielding pelvic parallel opposing field technique and non?lead?shielding four?field box technique for cervical cancer. Methods A total of 52 patients with stage Ⅱa?Ⅲb cervical squamous cell carcinoma who were admitted to our hospital from 2004 to 2007 were enrolled as subjects and paired by clinical stage, age, tumor size, and degree of anemia. The 26 pairs of patients were divided into lead?shielding pelvic parallel opposing field group (lead?shielding group) and non?lead?shielding four?field box group (non?lead?shielding group). For all patients in both groups, 252 Cf neutron brachytherapy was added in external?beam radiotherapy. The local control (LC), overall survival (OS), and disease?free survival (DFS) rates were calculated using the Kaplan?Meier method and analyzed using the log?rank test. The difference in the incidence of late complications was

  19. Corrective Action Investigation Plan for Corrective Action Unit 254: Area 25 R-MAD Decontamination Facility, Nevada Test Site, Nevada (includes ROTC No. 1, date 01/25/1999)

    Energy Technology Data Exchange (ETDEWEB)

    DOE/NV

    1999-07-29

    This Corrective Action Investigation Plan contains the US Department of Energy, Nevada Operations Office's approach to collect the data necessary to evaluate corrective action alternatives appropriate for the closure of Corrective Action Unit (CAU) 254 under the Federal Facility Agreement and Consent Order. Corrective Action Unit 254 consists of Corrective Action Site (CAS) 25-23-06, Decontamination Facility. Located in Area 25 at the Nevada Test Site (NTS), CAU 254 was used between 1963 through 1973 for the decontamination of test-car hardware and tooling used in the Nuclear Rocket Development Station program. The CAS is composed of a fenced area measuring approximately 119 feet by 158 feet that includes Building 3126, an associated aboveground storage tank, a potential underground storage area, two concrete decontamination pads, a generator, two sumps, and a storage yard. Based on site history, the scope of this plan is to resolve the problem statement identified during the Data Quality Objectives process that decontamination activities at this CAU site may have resulted in the release of contaminants of concern (COCs) onto building surfaces, down building drains to associated leachfields, and to soils associated with two concrete decontamination pads located outside the building. Therefore, the scope of the corrective action field investigation will involve soil sampling at biased and random locations in the yard using a direct-push method, scanning and static radiological surveys, and laboratory analyses of all soil/building samples. Historical information provided by former NTS employees indicates that solvents and degreasers may have been used in the decontamination processes; therefore, potential COCs include volatile/semivolatile organic compounds, Resource Conservation and Recovery Act metals, petroleum hydrocarbons, polychlorinated biphenyls, pesticides, asbestos, gamma-emitting radionuclides, plutonium, uranium, and strontium-90. The results of this

  20. Synthesis and antimicrobial screening of novel 2-(5-(4-(allyloxy-3-methoxyphenyl-1H-pyrazol-3-ylphenols analogues of 2-(4-(allyloxy-3-methoxyphenyl-4H-chromen-4-ones

    Directory of Open Access Journals (Sweden)

    Asha V. Chate

    2012-01-01

    Full Text Available A series of novel 2-(5-(4-(allyloxy-3-methoxyphenyl-1H-pyrazol-3-ylphenols derivatives have been synthesized via the ring opening of 2-(4-(allyloxy-3-methoxyphenyl-4H-chromen-4-ones in ethanol and hydrazine hydrate under reflux condition. The synthesized compounds were screened for antibacterial and antifungal activity against bacteria Staphylococcus aureus (MRSA E710 and Escherichia coli (ATCC 25922 and fungi Candida albicans and Aspergillus fumigates respectively. Some of the tested compounds showed significant antimicrobial activity. 1H NMR, IR, Mass spectral data and elemental analysis elucidated the structures of the all newly synthesized compounds.

  1. Structural and kinetic insights reveal that the amino acid pair Gln-228/Asn-254 modulates the transfructosylating specificity of Schwanniomyces occidentalis β-fructofuranosidase, an enzyme that produces prebiotics.

    Science.gov (United States)

    Álvaro-Benito, Miguel; Sainz-Polo, M Angela; González-Pérez, David; González, Beatriz; Plou, Francisco J; Fernández-Lobato, María; Sanz-Aparicio, Julia

    2012-06-01

    Schwanniomyces occidentalis β-fructofuranosidase (Ffase) is a GH32 dimeric enzyme that releases fructose from the nonreducing end of various oligosaccharides and essential storage fructans such as inulin. It also catalyzes the transfer of a fructosyl unit to an acceptor producing 6-kestose and 1-kestose, prebiotics that stimulate the growth of bacteria beneficial for human health. We report here the crystal structure of inactivated Ffase complexed with fructosylnystose and inulin, which shows the intricate net of interactions keeping the substrate tightly bound at the active site. Up to five subsites were observed, the sugar unit located at subsite +3 being recognized by interaction with the β-sandwich domain of the adjacent subunit within the dimer. This explains the high activity observed against long substrates, giving the first experimental evidence of the direct role of a GH32 β-sandwich domain in substrate binding. Crucial residues were mutated and their hydrolase/transferase (H/T) activities were fully characterized, showing the involvement of the Gln-228/Asn-254 pair in modulating the H/T ratio and the type β(2-1)/β(2-6) linkage formation. We generated Ffase mutants with new transferase activity; among them, Q228V gives almost specifically 6-kestose, whereas N254T produces a broader spectrum product including also neokestose. A model for the mechanism of the Ffase transfructosylation reaction is proposed. The results contribute to an understanding of the molecular basis regulating specificity among GH-J clan members, which represent an interesting target for rational design of enzymes, showing redesigned activities to produce tailor-made fructooligosaccharides.

  2. A study of the formation, purification and application as a SWNT growth catalyst of the nanocluster [HxPMo12O40[subset]H4Mo72Fe30(O2CMe)15O254(H2O)98].

    Science.gov (United States)

    Anderson, Robin E; Colorado, Ramon; Crouse, Christopher; Ogrin, Douglas; Maruyama, Benji; Pender, Mark J; Edwards, Christopher L; Whitsitt, Elizabeth; Moore, Valerie C; Koveal, Dorothy; Lupu, Corina; Stewart, Michael P; Smalley, Richard E; Tour, James M; Barron, Andrew R

    2006-07-07

    The synthetic conditions for the isolation of the iron-molybdenum nanocluster FeMoC [HxPMo12O40 [subset]H4Mo72Fe30(O2CMe)15O254(H2O)98], along with its application as a catalyst precursor for VLS growth of SWNTs have been studied. As-prepared FeMoC is contaminated with the Keplerate cage [H4Mo72Fe30(O2CMe)15O254(H2O)98] without the Keggin [HxPMo12O40]n- template, however, isolation of pure FeMoC may be accomplished by Soxhlet extraction with EtOH. The resulting EtOH solvate is consistent with the replacement of the water ligands coordinated to Fe being substituted by EtOH. FeMoC-EtOH has been characterized by IR, UV-vis spectroscopy, MS, XPS and 31P NMR. The solid-state 31P NMR spectrum for FeMoC-EtOH (delta-5.3 ppm) suggests little effect of the paramagnetic Fe3+ centers in the Keplerate cage on the Keggin ion's phosphorous. The high chemical shift anisotropy, and calculated T1 (35 ms) and T2 (8 ms) values are consistent with a weak magnetic interaction between the Keggin ion's phosphorus symmetrically located within the Keplerate cage. Increasing the FeCl2 concentration and decreasing the pH of the reaction mixture optimizes the yield of FeMoC. The solubility and stability of FeMoC in H2O and MeOH-H2O is investigated. The TGA of FeMoC-EtOH under air, Ar and H2 (in combination with XPS) shows that upon thermolysis the resulting Fe : Mo ratio is highly dependent on the reaction atmosphere: thermolysis in air results in significant loss of volatile molybdenum components. Pure FeMoC-EtOH is found to be essentially inactive as a pre-catalyst for the VLS growth of single-walled carbon nanotubes (SWNTs) irrespective of the substrate or reaction conditions. However, reaction of FeMoC with pyrazine (pyz) results in the formation of aggregates that are found to be active catalysts for the growth of SWNTs. Activation of FeMoC may also be accomplished by the addition of excess iron. The observation of prior work's reported growth of SWNTs from FeMoC is discussed with respect

  3. Degradation kinetics and mechanism of β-lactam antibiotics by the activation of H2O2 and Na2S2O8 under UV-254nm irradiation.

    Science.gov (United States)

    He, Xuexiang; Mezyk, Stephen P; Michael, Irene; Fatta-Kassinos, Despo; Dionysiou, Dionysios D

    2014-08-30

    The extensive production and usage of antibiotics have led to an increasing occurrence of antibiotic residuals in various aquatic compartments, presenting a significant threat to both ecosystem and human health. This study investigated the degradation of selected β-lactam antibiotics (penicillins: ampicillin, penicillin V, and piperacillin; cephalosporin: cephalothin) by UV-254nm activated H2O2 and S2O8(2-) photochemical processes. The UV irradiation alone resulted in various degrees of direct photolysis of the antibiotics; while the addition of the oxidants improved significantly the removal efficiency. The steady-state radical concentrations were estimated, revealing a non-negligible contribution of hydroxyl radicals in the UV/S2O8(2-) system. Mineralization of the β-lactams could be achieved at high UV fluence, with a slow formation of SO4(2-) and a much lower elimination of total organic carbon (TOC). The transformation mechanisms were also investigated showing the main reaction pathways of hydroxylation (+16Da) at the aromatic ring and/or the sulfur atom, hydrolysis (+18Da) at the β-lactam ring and decarboxylation (-44Da) for the three penicillins. Oxidation of amine group was also observed for ampicillin. This study suggests that UV/H2O2 and UV/S2O8(2-) advanced oxidation processes (AOPs) are capable of degrading β-lactam antibiotics decreasing consequently the antibiotic activity of treated waters.

  4. Reference: 254 [Arabidopsis Phenome Database[Archive

    Lifescience Database Archive (English)

    Full Text Available plant cell growth and identify a plant S-acyl transferase, an essential research...oots reproduces the Tip1- mutant phenotype. Our results demonstrate that S-acylation is essential for normal

  5. 36 CFR 254.2 - Definitions.

    Science.gov (United States)

    2010-07-01

    ... Environmental Protection Agency regulations at 40 CFR part 302. Highest and best use means an appraiser's... of valuation. Lands means any land and/or interests in land. Market value means the most...

  6. 50 CFR 216.254 - Mitigation.

    Science.gov (United States)

    2010-10-01

    ..., DEPARTMENT OF COMMERCE MARINE MAMMALS REGULATIONS GOVERNING THE TAKING AND IMPORTING OF MARINE MAMMALS Taking Marine Mammals Incidental to Conducting Precision Strike Weapon Missions in the Gulf of Mexico §...

  7. 30 CFR 254.6 - Definitions.

    Science.gov (United States)

    2010-07-01

    .... These include, but are not limited to: Fog, inhospitable water and air temperatures, wind, sea ice... part: Adverse weather conditions means weather conditions found in the operating area that make it... and published under section 311(j) of the Federal Water Pollution Control Act (FWPCA). Coast...

  8. Evidence Based Education Request Desk. EBE #254

    Science.gov (United States)

    Regional Educational Laboratory Southeast, 2008

    2008-01-01

    This response looks specifically at the research related to teacher certification, alternative certification, and student achievement in science or mathematics. The research findings are inconclusive, and there is a need for more experimental and quasi-experimental studies to further define causality. (Contains 1 footnote.)

  9. 14 CFR 254.6 - Periodic adjustments.

    Science.gov (United States)

    2010-01-01

    ... review the minimum limit of liability prescribed in this part every two years. The Department will use the Consumer Price Index for All Urban Consumers as of July of each review year to calculate the revised minimum liability amount. The Department will use the following formula: $2500 × (a/b) rounded...

  10. 7 CFR 1901.254 - Scope.

    Science.gov (United States)

    2010-01-01

    ... improve: (i) Community water, sanitary sewage, solid waste disposal, and storm waste water disposal... develop land, water, and other related resources for increased production of food and other crops... development of business and industry including guaranteed loans. (2) Loans and grants for multiple...

  11. 36 CFR 254.9 - Appraisals.

    Science.gov (United States)

    2010-07-01

    ... the whole; and (ii) The valuation is compatible with the highest and best use of the property. (3) In... comparative market analysis and, if more than one method of valuation is used, an analysis and reconciliation... sales, including a description of all relevant physical, legal, and economic factors such as parties...

  12. Analysis of rubella virus infection among pregnant women in 36 254 cases%36254例妊娠期孕妇风疹病毒感染状况分析

    Institute of Scientific and Technical Information of China (English)

    索庆丽; 胡晞江; 姚婷

    2012-01-01

    Objective To investigate the rubella virus(RV) infection and susceptibility condition among pregnant women in Wuhan maternal and child health hospital for 10 years,and to provide references for the prevention of pregnancy RV infection and congenital rubella syndrome(CRS). Methods ELISA was used to measure the RV-IgM and RV-IgG in the serum samples of 36 254 cases of RV infected pregnant women,which were divided into a variety of infection models,and we used two or more group x2 test for statistical analysis. Results The positive rate of RV-IgM among pregnant women was 1. 52%,of which the primary RV infection during pregnancy was 1. 02% ;the RV susceptibility rate during middle pregnancy was significantly higher than early pregnancy, recent RV uninfected and immunized pregnant women in early pregnancy were significantly higher than middle and later pregnancy; RV susceptible rate in pregnant women increased significantly with increasing age trend. Conclusion The recent RV infection rate of pregnant women in that hospital for 10 years is at an intermediate level. RV natural infection rate was higher among childbearing aged and pregnant women. The health care institutions at all levels should strengthen the management of RV susceptible pregnant women during early and middle pregnancy and guide the susceptible women of childbearing age to accept vaccination and prevent aged pregnant women from RV infection.%目的 调查武汉市妇幼保健院10年妊娠期孕妇风疹病毒(RV)感染和易感状况,为预防妊娠期RV感染和胎儿先天性风疹综合征(CRS)提供参考依据.方法 用酶联免疫吸附法(ELISA)检测36 254例孕妇血清中RV-IgM和RV-IgG两项指标,将其分为多种感染模式,采用两组或多组比较的χ2检验进行统计分析.结果 孕妇RV-IgM阳性率为1.52%,其中,妊娠期RV原发感染孕妇为1.02%;中孕期RV易感率显著高于早孕;早孕期近期未感染RV且对其具有免疫力的孕妇显著高于中、晚孕期

  13. Destruction of microcystins (cyanotoxins) by UV-254 nm-based direct photolysis and advanced oxidation processes (AOPs): influence of variable amino acids on the degradation kinetics and reaction mechanisms.

    Science.gov (United States)

    He, Xuexiang; de la Cruz, Armah A; Hiskia, Anastasia; Kaloudis, Triantafyllos; O'Shea, Kevin; Dionysiou, Dionysios D

    2015-05-01

    Hepatotoxic microcystins (MCs) are the most frequently detected group of cyanobacterial toxins. This study investigated the degradation of common MC variants in water, MC-LR, MC-RR, MC-YR and MC-LA, by UV-254 nm-based processes, UV only, UV/H2O2, UV/S2O8(2-) and UV/HSO5(-). Limited direct photolysis of MCs was observed, while the addition of an oxidant significantly improved the degradation efficiency with an order of UV/S2O8(2-) > UV/HSO5(-) > UV/H2O2 at the same initial molar concentration of the oxidant. The removal of MC-LR by UV/H2O2 appeared to be faster than another cyanotoxin, cylindrospermopsin, at either the same initial molar concentration or the same initial organic carbon concentration of the toxin. It suggested a faster reaction of MC-LR with hydroxyl radical, which was further supported by the determined second-order rate constant of MCs with hydroxyl radical. Both isomerization and photohydration byproducts were observed in UV only process for all four MCs; while in UV/H2O2, hydroxylation and diene-Adda double bond cleavage byproducts were detected. The presence of a tyrosine in the structure of MC-YR significantly promoted the formation of monohydroxylation byproduct m/z 1061; while the presence of a second arginine in MC-RR led to the elimination of a guanidine group and the absence of double bond cleavage byproducts. It was therefore demonstrated in this study that the variable amino acids in the structure of MCs influenced not only the degradation kinetics but also the preferable reaction mechanisms.

  14. Degradation kinetics and mechanism of β-lactam antibiotics by the activation of H{sub 2}O{sub 2} and Na{sub 2}S{sub 2}O{sub 8} under UV-254 nm irradiation

    Energy Technology Data Exchange (ETDEWEB)

    He, Xuexiang [Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012 (United States); Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, PO Box 20537, 1678 Nicosia (Cyprus); Mezyk, Stephen P. [Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840 (United States); Michael, Irene; Fatta-Kassinos, Despo [Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, PO Box 20537, 1678 Nicosia (Cyprus); Dionysiou, Dionysios D., E-mail: dionysios.d.dionysiou@uc.edu [Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012 (United States); Department of Civil and Environmental Engineering and Nireas-International Water Research Centre, School of Engineering, University of Cyprus, PO Box 20537, 1678 Nicosia (Cyprus)

    2014-08-30

    Graphical abstract: - Highlights: • Removal efficiency was comparable at different UV fluence rates but same fluence. • Reducing pH to 3 or 2 did not inhibit the removal of nitrobenzene by UV/S{sub 2}O{sub 8}{sup 2−}. • 1.84 × 10{sup −14} M [HO{sup •} ]{sub ss} and 3.10 × 10{sup −13} M [SO{sub 4}{sup •} {sup −}]{sub ss} in UV/S{sub 2}O{sub 8}{sup 2−} were estimated. • HO{sup •} reacted faster with the β-lactams than SO{sub 4}{sup •} {sup −} but sharing similar byproducts. • Transformation pathways included hydroxylation, hydrolysis and decarboxylation. - Abstract: The extensive production and usage of antibiotics have led to an increasing occurrence of antibiotic residuals in various aquatic compartments, presenting a significant threat to both ecosystem and human health. This study investigated the degradation of selected β-lactam antibiotics (penicillins: ampicillin, penicillin V, and piperacillin; cephalosporin: cephalothin) by UV-254 nm activated H{sub 2}O{sub 2} and S{sub 2}O{sub 8}{sup 2−} photochemical processes. The UV irradiation alone resulted in various degrees of direct photolysis of the antibiotics; while the addition of the oxidants improved significantly the removal efficiency. The steady-state radical concentrations were estimated, revealing a non-negligible contribution of hydroxyl radicals in the UV/S{sub 2}O{sub 8}{sup 2−} system. Mineralization of the β-lactams could be achieved at high UV fluence, with a slow formation of SO{sub 4}{sup 2−} and a much lower elimination of total organic carbon (TOC). The transformation mechanisms were also investigated showing the main reaction pathways of hydroxylation (+16 Da) at the aromatic ring and/or the sulfur atom, hydrolysis (+18 Da) at the β-lactam ring and decarboxylation (–44 Da) for the three penicillins. Oxidation of amine group was also observed for ampicillin. This study suggests that UV/H{sub 2}O{sub 2} and UV/S{sub 2}O{sub 8}{sup 2−} advanced

  15. Survey about caries condition and oral health habits of 254 preschool children in Chengdu%成都市学龄前儿童龋患情况及口腔卫生习惯调查分析

    Institute of Scientific and Technical Information of China (English)

    林靖雯; 王洪萍

    2011-01-01

    目的 了解成都市学龄前儿童口腔卫生习惯及口腔健康状况,为口腔健康教育及口腔预防保健提供依据.方法 对成都市264例学龄前儿童进行口腔检查和问卷调查,了解其龋患情况和口腔卫生习惯,对各年龄段患龋率、龋均、口腔卫生习惯进行统计分析.结果 成都市学龄前儿童患龋率为11%,龋均0.46,随年龄增加龋患情况逐渐加重.仅有25%的学龄前儿童坚持每天清洁牙齿,且开始刷牙年龄较晚.结论 成都市学龄前儿童的口腔健康状况有待加强,督促家长帮助孩子从小树立良好的口腔卫生习惯非常重要.%Objective This study was planned to acquire oral health habits and oral health condition of preschool children in Chengdu and provide a basis for oral education, oral health care and disease prevention.Methods Oral examination and questionnaire survey was conducted among 254 preschool children in Chengdu to aquire their caries condition and oral health habits.Caries prevalence rate, dmft, oral health habits of each age group were statistically analyzed.Results Caries prevalence rate of preschool children in Chengdu was 11%, and dmft was 0.46.Caries condition was aggvagated with age increasing.Only 25 % preschool children persisted in cleaning teeth every day, and preschool children of Chengdu began cleaning teeth at an older age.Conclusion Oral health condition of preschool children in Chengdu needs to be improved.It is very important to prompt parents to help children to form good oral health habits from childhood.

  16. Time Series Analysis For The Californium Source In Sudbury Neutrino Observatory

    CERN Document Server

    Labranche, H

    2004-01-01

    The Sudbury Neutrino Observatory uses a 252Cf source to measure the neutron detection efficiency of its detector. We propose a method, the Time Series Analysis, that uses pairs of time intervals between the detected events to find the neutron detection efficiency, the probability to detect from a fission the prompt γ-rays, the neutron mean life inside the detector, the source fission rate and the residual activity rate from non-fission events. We explain our theoretical model of the source and the procedure to fit the data. With a 2.5 MeV threshold cut on the data, the neutron mean life is 5.281 ± 0.004(stat) msec and the source fission rate at June 12, 2001 is 4.360 ± 0.004(stat) sec −1. At this moment, the Time Series can only be applied to data when the source is near the centre. The technique is also applied with an AmBe source. We also show the latest progress to improve the technique. Finally, we briefly show another method, the Multiplicity Analysis, which was ...

  17. Design and Potentials of the Californium-252 Radiation Facility at WES

    Science.gov (United States)

    1975-09-01

    standards, using an Image Quality Indicator (IQI) and also a Beam Purity Indicator (BPI),** shows a relatively good thermal and epithermal neutron ...colli-nated beam of the desired neutron radiation. Consideration of the basic nuclear properties was therefore a necessity in achieving the desired...The upper 6 ft has been designed for use in radiography and neutron counting. The steel tank was prefabricated in two sections. The lower 6-ft

  18. Design of a californium-based epithermal neutron beam for neutron capture therapy.

    Science.gov (United States)

    Yanch, J C; Kim, J K; Wilson, M J

    1993-08-01

    The potential of the spontaneously fissioning isotope, 252Cf, to provide epithermal neutrons for use in boron neutron capture therapy (BNCT) has been investigated using Monte Carlo simulation. The Monte Carlo code MCNP was used to design an assembly composed of a 26 cm long, 11 cm radius cylindrical D2O moderator followed by a 64 cm long Al filter. Lithium filters are placed between the moderator and the filter and between the Al and the patient. A reflector surrounding the moderator/filter assembly is required in order to maintain adequate therapy flux at the patient position. An ellipsoidal phantom composed of skull- and brain-equivalent material was used to determine the dosimetric effect of this beam. It was found that both advantage depths and advantage ratios compare very favourably with reactor and accelerator epithermal neutron sources. The dose rate obtainable, on the other hand, is 4.1 RBE cGy min-1, based on a very large (1.0 g) source of 252Cf. This dose rate is two to five times lower than those provided by existing reactor beams and can be viewed as a drawback of using 252Cf as a neutron source. Radioisotope sources, however, do offer the advantage of in-hospital installation.

  19. Transobturator or retropublic passage tension-free vaginal tape for 254 female patients with stress urinary incontinence%经闭孔或耻骨后无张力阴道吊带术治疗女性压力性尿失禁的临床分析

    Institute of Scientific and Technical Information of China (English)

    洪莉; 许学先; 詹炳炎

    2008-01-01

    This study was to retrospectively report the clinical effects of retropublic passage tension free vaginal tape(TVT)vs.transobturator tape(TVT-O)on 254 female patients with stress urinary incontinence(SUI).Our findings showed that mean operative time was significantly lower in TVT-O group than that in TVT group[(19±4)min vs.(27±6)min;P<0.05].Perioperative complications were more commonly seen in the retropubic procedure(2.9% vs.8.8%;P<0.01).There was no significant difference in intraoperative blood loss[(19±6)ml vs.(31±8)ml in TVT-O or TVT groups;P>0.05]and in-hospital stay[(4.1±1.5)d vs.(4.5±1.8)d in TVT-O or TvT groups;P>0.05]between the two groups.Grouts-Blaivas Score demonstrated that those two treatment groups did not differ significantly in 24-hour(93.6% vs.91.2%;P>0.05)or long-term postoperative cure rate(94.5% vs.94.3%;P>0.05).We suggested that TVT or TVT-O seemed to be equally effective in surgical treatment of SUI.However,TVT-O had advantage of relatively lower overall perioperative complication rate.%回顾性分析254例女性压力性尿失禁(SUI)患者行经闭孔无张力阴道吊带术(TVT-O)或经耻骨后无张力阴道吊带术(TVT)的疗效.结果显示TVT-O组与TVT组相比,手术时间明显缩短[(19±4)min,(27±6)min;P<0.01]、并发症明显减少(2.9%,8.8%;P<0.01);术中出血[(19±6)ml,(31±8)ml]、住院时间[(4.1±1.5)d,(4.5±1.8)d]、Grouts-Blaivas评分法评定的术后24 h(93.6%,91.2%)和末次随访治愈率(94.5%,94.3%)差异无统计学意义(P>0.05).提示两种方法均为治疗女性SUI的有效方法,但TVT-O并发症明显减少.

  20. Ab initio determination of the framework structure of the heavy-metal oxide Cs{sub x}Nb{sub 2.54}W{sub 2.46}O{sub 14} from 100kV precession electron diffraction data

    Energy Technology Data Exchange (ETDEWEB)

    Weirich, Thomas E. [Gemeinschaftslabor fuer Elektronenmikroskopie der Rheinisch-Westfaelischen Technischen Hochschule (RWTH) Aachen, Ahornstrasse 55, Aachen D-52074 (Germany)]. E-mail: weirich@gfe.rwth-aachen.de; Portillo, Joaquim [NanoMEGAS, Boulevard Edmond Machtens 79, Brussels B-1080 (Belgium); SERVEIS Cientificotecnics, Universitat de Barcelona/Sole i Sabaris s/n, Barcelona 08028 (Spain); Cox, Gerhard [BASF-AG, Polymer Physics Department, Ludwigshafen D-67065 (Germany); Hibst, Hartmut [BASF-AG, Catalysis Research Department Ludwigshafen D-67065 (Germany); Nicolopoulos, Stavros [NanoMEGAS, Boulevard Edmond Machtens 79, Brussels B-1080 (Belgium); Universidad Politecnica de Valencia /ITQ Avda de los Naranjos s/n, Valencia 46071 (Spain)

    2006-02-15

    The present work deals with the ab initio determination of the heavy metal framework in Cs{sub x}(Nb, W){sub 5}O{sub 14} from precession electron diffraction intensities. The target structure was first discovered by Lundberg and Sundberg [Ultramicroscopy 52 (1993) 429-435], who succeeded in deriving a tentative structural model from high-resolution electron microsopy (HREM) images. The metal framework of the compound was solved in this investigation via direct methods from hk0 precession electron diffraction intensities recorded with a Philips EM400 at 100kV. A subsequent (kinematical) least-squares refinement with electron intensities yielded slightly improved co-ordinates for the 11 heavy atoms in the structure. Chemical analysis of several crystallites by EDX is in agreement with the formula Cs{sub 0.44}Nb{sub 2.54}W{sub 2.46}O{sub 14}. Moreover, the structure was independently determined by Rietveld refinement from X-ray powder data obtained from a multi-phasic sample. The compound crystallises in the orthorhombic space group Pbam with refined lattice parameters a=27.145(2), b=21.603(2), and c=3.9463(3)A. Comparison of the framework structure from electron diffraction with the result from Rietveld refinement shows an average agreement for the heavy atoms within 0.09A.

  1. Exploration of allosteric agonism structure-activity relationships within an acetylene series of metabotropic glutamate receptor 5 (mGlu5) positive allosteric modulators (PAMs): discovery of 5-((3-fluorophenyl)ethynyl)-N-(3-methyloxetan-3-yl)picolinamide (ML254).

    Science.gov (United States)

    Turlington, Mark; Noetzel, Meredith J; Chun, Aspen; Zhou, Ya; Gogliotti, Rocco D; Nguyen, Elizabeth D; Gregory, Karen J; Vinson, Paige N; Rook, Jerri M; Gogi, Kiran K; Xiang, Zixiu; Bridges, Thomas M; Daniels, J Scott; Jones, Carrie; Niswender, Colleen M; Meiler, Jens; Conn, P Jeffrey; Lindsley, Craig W; Stauffer, Shaun R

    2013-10-24

    Positive allosteric modulators (PAMs) of metabotropic glutamate receptor 5 (mGlu5) represent a promising therapeutic strategy for the treatment of schizophrenia. Both allosteric agonism and high glutamate fold-shift have been implicated in the neurotoxic profile of some mGlu5 PAMs; however, these hypotheses remain to be adequately addressed. To develop tool compounds to probe these hypotheses, the structure-activity relationship of allosteric agonism was examined within an acetylenic series of mGlu5 PAMs exhibiting allosteric agonism in addition to positive allosteric modulation (ago-PAMs). PAM 38t, a low glutamate fold-shift allosteric ligand (maximum fold-shift ~ 3.0), was selected as a potent PAM with no agonism in the in vitro system used for compound characterization and in two native electrophysiological systems using rat hippocampal slices. PAM 38t (ML254) will be useful to probe the relative contribution of cooperativity and allosteric agonism to the adverse effect liability and neurotoxicity associated with this class of mGlu5 PAMs.

  2. 40 CFR 52.254 - Organic solvent usage.

    Science.gov (United States)

    2010-07-01

    ... oxidized to carbon dioxide, or (2) Adsorption, or (3) Processing in a manner determined by the..., organic materials are defined as chemical compounds of carbon excluding carbon monoxide, carbon dioxide... contrivances designed for processing continuous web, strip, or wire that emit organic materials in the...

  3. Dicty_cDB: AFN254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available ( C90153 ) Dictyostelium discoideum slug cDNA, clone SSI153. 523 e-144 1 ( DY264372 ) IC0AAA14BE01RM1 CitNFL Citrus clementi... clo... 68 9e-07 1 ( DY273682 ) IC0AAA34CE03RM1 CitNFL Citrus clementina cDNA 5',... 46 1e-06 2 dna update 2

  4. 29 CFR 1910.254 - Arc welding and cutting.

    Science.gov (United States)

    2010-07-01

    ... given to safety ground connections of portable machines. (4) Leaks. There shall be no leaks of cooling... Requirements for Electric Arc-Welding Apparatus, NEMA EW-1-1962, National Electrical Manufacturers Association or the Safety Standard for Transformer-Type Arc-Welding Machines, ANSI C33.2—1956,...

  5. 40 CFR 180.254 - Carbofuran; tolerances for residues.

    Science.gov (United States)

    2010-07-01

    ... Parts per million (ppm) Expiration/Revocation date Alfalfa, forage (of which no more than 5 ppm are carbamates) 10 12/31/09 Alfalfa, hay (of which no more than 20 ppm are carbamates) 40 12/31/09 Banana 0.1 12... which no more than 1.0 ppm is carbamates) 5.0 12/31/09 Beet, sugar, roots 0.1 12/31/09 Beet, sugar,...

  6. 7 CFR 764.254 - Rates and terms.

    Science.gov (United States)

    2010-01-01

    ... made for family living and farm operating expenses when planned income is projected to be available. (i... exceed 18 months in unusual situations such as establishing a new enterprise, developing a farm... enterprise, develop a farm, or recover from a disaster or economic reversal. Loans with balloon...

  7. Dicty_cDB: VSK254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 3139.1 PfESToab38c04.y1 Plasmodium falciparum 3D7 asexual cDNA Plasmodium falciparum cDNA 5', mRNA sequence.... 36 0.024 2 BU496524 |BU496524.1 PfESToab51c12.y1 Plasmodium falciparum 3D7 asexual... cDNA Plasmodium falciparum cDNA 5', mRNA sequence. 36 0.026 2 BU496772 |BU496772.1 PfESToab58f06.y1 Plasmodium falciparum 3D7 asex...ual cDNA Plasmodium falciparum cDNA 5', mRNA sequence. 36 0.027 2 AX348891 |AX34889

  8. 36 CFR 254.36 - Determining public interest.

    Science.gov (United States)

    2010-07-01

    ... management of National Forest System lands will be more efficient and will result in improved utilization; (3... impeded or restricted; (4) New or extensive inholdings which would create management problems will not...

  9. Dicty_cDB: VHP254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available GTTTGCTGGTAAAATAGATTTCCCAATGTCGGTAATATCNTACCTCGTTTA sequence update 2002.10.25 Translated Amino Acid sequence kccstinptfmink...VDIIVKQYHLLNNFDEFTNRSALFAGRKQTIQDLQSRTQCIALFAGKID FPMSVISYLV Frame B: kccstinptfmink*KRREKKMNVKEMDFNDLSNKSNQ

  10. 16 CFR 254.0 - Scope and application.

    Science.gov (United States)

    2010-01-01

    ..., business, or clerical skills, or that is for the purpose of enabling a person to improve his appearance, social aptitude, personality, or other attributes. These Guides do not apply to resident primary...

  11. Dicty_cDB: VHL254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available AAAAAAA sequence update 2002.10.25 Translated Amino Acid sequence fkriyfegrsgegfhnngihlwvsrs*glg*lslirllghwieseggfntsdfig...mgapvrvm*pikhxiixkrkkk Frame C: fkriyfegrsgegfhnngihlwvsrs*glg*lslirllghwieseggfntsdfigrkgsg lkflhhrmgy*gnrs

  12. Dicty_cDB: SLC254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available wgtt*lf**tnfi*ftsdnwatwn**sitlifiiiisiriiiiiiir i*w*ttrwnlntavtrtswtfirnhcaiq*TXINIMTSFTMTWMGF--- ---LNGAFPQ...tt*lf**tnfi*ftsdnwatwn**sitlifiiiisiriiiiiiir i*w*ttrwnlntavtrtswtfirnhcaiq*TXINIMTSFTMTWMGF--- ---t*wsistti

  13. Dicty_cDB: SHK254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available mplete sequence. 62 4e-05 1 CK808839 |CK808839.1 Rasgsc1686 Salivary Gland 4th instar 3rd period (spinning....1 Rasgsc1529 Salivary Gland 4th instar 3rd period (spinning cocoon) Rhynchosciara americana cDNA, mRNA sequ... discoideum, Genomic, 1918 nt]. 58 6e-04 1 CK808037 |CK808037.1 Rasgsc0316 Salivary Gland 4th instar 3rd period (spinning

  14. Dicty_cDB: CHN254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available |CK808839.1 Rasgsc1686 Salivary Gland 4th instar 3rd period (spinning cocoon) Rhynchosciara americana cDNA, ...mRNA sequence. 34 4e-05 4 CK808739 |CK808739.1 Rasgsc1529 Salivary Gland 4th instar 3rd period (spinning...-04 2 CK808037 |CK808037.1 Rasgsc0316 Salivary Gland 4th instar 3rd period (spinning cocoon) Rhynchosciara a

  15. Dicty_cDB: SHF254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available DE283369 |DE283369.1 Oryzias latipes DNA, clone: ola1-242I19.F, genomic survey sequence. 54 0.004 1 DE092915... |DE092915.1 Oryzias latipes DNA, clone: ola1-209J09.R, genomic survey sequence. 54 0.004 1 DE086252 |DE0862...52.1 Oryzias latipes DNA, clone: ola1-188M19.F, genomic survey sequence. 54 0.004... 1 DE078411 |DE078411.1 Oryzias latipes DNA, clone: ola1-200D13.F, genomic survey sequence. 54 0.004 1 DE075...571 |DE075571.1 Oryzias latipes DNA, clone: ola1-178O04.F, genomic survey sequence. 54 0.004 1 DE067405 |DE0

  16. Dicty_cDB: SHD254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available -16-2_G01_sjs2-16-2G01-T3 SJS Schistosoma japonicum cDNA, mRNA sequence. 56 0.001 1 CV682907 |CV682907.1 service...43_H06_sjs2-16-2B11-T3 SJS Schistosoma japonicum cDNA, mRNA sequence. 56 0.001 1 CV682854 |CV682854.1 service

  17. Dicty_cDB: VFM254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available (All Frames) Frame A: ---xxxxxxxxxxxxxxxxvxxxxxxxrxxxxxxxxxxxxxxxkvxxxxxkxxfxxvxnx xmvvlxxittfkrnplsi*ssd*ev...vckflskpslvrllhxklkvlitlrmlkpksktkk vfhqinnvsfspvnnwrmvvlslittfkrnplsi*fsd*evvckfl*klslvkplhsklk vvttlrm*kqkfktkkvshq Frame B: ---xxx...xxxxxxxxxxxxwxxxxxxsxgxxxxxxcxxxxxxxxryxxxxxxxxfxw*xix x

  18. Dicty_cDB: SFB254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available -ALEIPCDILIPXCPRKTNPHW*rrrysx*inw*scqrsndptc*pnppq*rschhsr splkcwwchciil*mvkesfsrsfrsfeqemgrilkeiiiric*inrqq...q*rschhsr splkcwwchciil*mvkesfsrsfrsfeqemgrilkeiiiric*inrqqeiirs*kklnh pwc**nryrsfrsrryhakclc*nqkdck*keh*lpf

  19. Dicty_cDB: SSI254 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 2_F NXLV (Nsf Xylem Late wood Vertical) Pinus taeda cDNA clone NXLV130_B02 5', mRNA sequence. 36 1.2 2 CD018...464 |CD018464.1 NXLV_028_H10_F NXLV (Nsf Xylem Late wood Vertical) Pinus taeda cD

  20. 山东临沂市254名农村婴幼儿血清视黄醇和类胡萝卜素水平及其与相关膳食因素的关系%Serum retinol and carotenoid of rural infants and young children in Linyi of Shangdong Province and analysis on their related influencing dietary factors

    Institute of Scientific and Technical Information of China (English)

    范萍; 沈遥; 李永华; 马爱勤; 孙忠清; 汪之顼

    2012-01-01

    目的 为了解农村婴幼儿血清维生素A(VA)营养状况和血清类胡萝卜素水平,以及两者关系和相关影响因素而开展本研究.方法 采用整群抽样方法,对山东省临沂市某镇辖区内254名6~24月龄健康婴幼儿进行健康体检和喂养状况调查.采集足背静脉血样,用高效液相色谱法测定血清视黄醇和β-胡萝卜素、α-胡萝卜素、β-隐黄素及叶黄素+玉米黄素含量.用膳食频率法回顾性调查婴幼儿最近一个月内的各类食物摄入状况,分析喂养状况与血清视黄醇和类胡萝卜素水平的关系.结果 被调查婴幼儿血清视黄醇浓度平均为(0.96±0.55)μmol/L,不同月龄段间没有明显差异(P>0.05);血清VA缺乏率为40.6%,边缘性VA缺乏率为32.6%.血清β-胡萝卜素、α-胡萝卜素、β-隐黄素和叶黄素+玉米黄素浓度的平均值分别为(0.056±0.088) μmol/L、(3.3±12.1) nmol/L、(27.0±45.2) nmol/L和(0.22±0.22) μmol/L.不同月龄段儿童血清叶黄素+玉米黄素浓度存在差异(P<0.05),13 ~18月龄段低于6~12月龄儿童.母乳喂养和配方奶粉是影响婴幼儿血清视黄醇和β-胡萝卜素水平的主要因素.母乳喂养频率与β-胡萝卜素水平呈负相关(P<0.05),而配方粉喂养频率与血清视黄醇和除α-胡萝卜素以外的类胡萝卜素水平呈正相关(均为P<0.05);水果蔬菜喂养频率则只与血清β-胡萝卜素、α-胡萝卜素和β-隐黄素浓度呈正相关.血清视黄醇与类胡萝卜素各组分,以及类胡萝卜素各组分之间,具有显著正相关关系(均为P <0.001).结论 调查的农村婴幼儿血清VA营养状况较差,血清β-胡萝卜素、α-胡萝卜素、β-隐黄素及叶黄素+玉米黄素浓度与母乳、配方奶粉、水果蔬菜添加等喂养状况关系密切.%Objective The study was carried out to determine serum retinol and carotenoid of infants and young children in rural areas, and to explore their related

  1. Determination of the optimum-size californium-252 neutron source for borehole capture gamma-ray analysis

    Science.gov (United States)

    Senftle, F.E.; Macy, R.J.; Mikesell, J.L.

    1979-01-01

    The fast- and thermal-neutron fluence rates from a 3.7 ??g 252Cf neutron source in a simulated borehole have been measured as a function of the source-to-detector distance using air, water, coal, iron ore-concrete mix, and dry sand as borehole media. Gamma-ray intensity measurements were made for specific spectral lines at low and high energies for the same range of source-to-detector distances in the iron ore-concrete mix and in coal. Integral gamma-ray counts across the entire spectrum were also made at each source-to-detector distance. From these data, the specific neutron-damage rate, and the critical count-rate criteria, we show that in an iron ore-concrete mix (low hydrogen concentration), 252Cf neutron sources of 2-40 ??g are suitable. The source size required for optimum gamma-ray sensitivity depends on the energy of the gamma ray being measured. In a hydrogeneous medium such as coal, similar measurements were made. The results show that sources from 2 to 20 ??g are suitable to obtain the highest gamma-ray sensitivity, again depending on the energy of the gamma ray being measured. In a hydrogeneous medium, significant improvement in sensitivity can be achieved by using faster electronics; in iron ore, it cannot. ?? 1979 North-Holland Publishing Co.

  2. Optical transitions in highly charged californium ions with high sensitivity to variation of the fine-structure constant.

    Science.gov (United States)

    Berengut, J C; Dzuba, V A; Flambaum, V V; Ong, A

    2012-08-17

    We study electronic transitions in highly charged Cf ions that are within the frequency range of optical lasers and have very high sensitivity to potential variations in the fine-structure constant, α. The transitions are in the optical range despite the large ionization energies because they lie on the level crossing of the 5f and 6p valence orbitals in the thallium isoelectronic sequence. Cf(16+) is a particularly rich ion, having several narrow lines with properties that minimize certain systematic effects. Cf(16+) has very large nuclear charge and large ionization energy, resulting in the largest α sensitivity seen in atomic systems. The lines include positive and negative shifters.

  3. Keno-Nr a Monte Carlo Code Simulating the Californium -252-SOURCE-DRIVEN Noise Analysis Experimental Method for Determining Subcriticality

    Science.gov (United States)

    Ficaro, Edward Patrick

    The ^{252}Cf -source-driven noise analysis (CSDNA) requires the measurement of the cross power spectral density (CPSD) G_ {23}(omega), between a pair of neutron detectors (subscripts 2 and 3) located in or near the fissile assembly, and the CPSDs, G_{12}( omega) and G_{13}( omega), between the neutron detectors and an ionization chamber 1 containing ^{252}Cf also located in or near the fissile assembly. The key advantage of this method is that the subcriticality of the assembly can be obtained from the ratio of spectral densities,{G _sp{12}{*}(omega)G_ {13}(omega)over G_{11 }(omega)G_{23}(omega) },using a point kinetic model formulation which is independent of the detector's properties and a reference measurement. The multigroup, Monte Carlo code, KENO-NR, was developed to eliminate the dependence of the measurement on the point kinetic formulation. This code utilizes time dependent, analog neutron tracking to simulate the experimental method, in addition to the underlying nuclear physics, as closely as possible. From a direct comparison of simulated and measured data, the calculational model and cross sections are validated for the calculation, and KENO-NR can then be rerun to provide a distributed source k_ {eff} calculation. Depending on the fissile assembly, a few hours to a couple of days of computation time are needed for a typical simulation executed on a desktop workstation. In this work, KENO-NR demonstrated the ability to accurately estimate the measured ratio of spectral densities from experiments using capture detectors performed on uranium metal cylinders, a cylindrical tank filled with aqueous uranyl nitrate, and arrays of safe storage bottles filled with uranyl nitrate. Good agreement was also seen between simulated and measured values of the prompt neutron decay constant from the fitted CPSDs. Poor agreement was seen between simulated and measured results using composite ^6Li-glass-plastic scintillators at large subcriticalities for the tank of uranyl nitrate. It is believed that the response of these detectors is not well known and is incorrectly modeled in KENO-NR. In addition to these tests, several benchmark calculations were also performed to provide insight into the properties of the point kinetic formulation.

  4. Accurate determination of Curium and Californium isotopic ratios by inductively coupled plasma quadrupole mass spectrometry (ICP-QMS) in 248Cm samples for transmutation studies

    Energy Technology Data Exchange (ETDEWEB)

    Gourgiotis, A.; Isnard, H.; Aubert, M.; Dupont, E.; AlMahamid, I.; Cassette, P.; Panebianco, S.; Letourneau, A.; Chartier, F.; Tian, G.; Rao, L.; Lukens, W.

    2011-02-01

    The French Atomic Energy Commission has carried out several experiments including the mini-INCA (INcineration of Actinides) project for the study of minor-actinide transmutation processes in high intensity thermal neutron fluxes, in view of proposing solutions to reduce the radiotoxicity of long-lived nuclear wastes. In this context, a Cm sample enriched in {sup 248}Cm ({approx}97 %) was irradiated in thermal neutron flux at the High Flux Reactor (HFR) of the Laue-Langevin Institute (ILL). This work describes a quadrupole ICP-MS (ICP-QMS) analytical procedure for precise and accurate isotopic composition determination of Cm before sample irradiation and of Cm and Cf after sample irradiation. The factors that affect the accuracy and reproducibility of isotopic ratio measurements by ICP-QMS, such as peak centre correction, detector dead time, mass bias, abundance sensitivity and hydrides formation, instrumental background, and memory blank were carefully evaluated and corrected. Uncertainties of the isotopic ratios, taking into account internal precision of isotope ratio measurements, peak tailing, and hydrides formations ranged from 0.3% to 1.3%. This uncertainties range is quite acceptable for the nuclear data to be used in transmutation studies.

  5. Radiological Characterization Technical Report on Californium-252 Sealed Source Transuranic Debris Waste for the Off-Site Source Recovery Project at Los Alamos National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Feldman, Alexander [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-04-24

    This document describes the development and approach for the radiological characterization of Cf-252 sealed sources for shipment to the Waste Isolation Pilot Plant. The report combines information on the nuclear material content of each individual source (mass or activity and date of manufacture) with information and data on the radionuclide distributions within the originating nuclear material. This approach allows for complete and accurate characterization of the waste container without the need to take additional measurements. The radionuclide uncertainties, developed from acceptable knowledge (AK) information regarding the source material, are applied to the summed activities in the drum. The AK information used in the characterization of Cf-252 sealed sources has been qualified by the peer review process, which has been reviewed and accepted by the Environmental Protection Agency.

  6. Isopropyl 2-[5-(4-hydroxyphenyl-3-methylsulfanyl-1-benzofuran-2-yl]acetate

    Directory of Open Access Journals (Sweden)

    Hong Dae Choi

    2009-09-01

    Full Text Available In the title compound, C20H20O4S, the 4-hydroxyphenyl ring is rotated out of the plane of the benzofuran unit by 32.87 (8°. The S—Cmethyl bond is almost perpendicular to the plane of the benzofuran fragment [77.8 (1°] and is slightly tilted towards it. The crystal structure is stabilized by intermolecular O—H...O and C—H...O hydrogen bonds.

  7. 16 CFR 254.4 - Misrepresentation of facilities, services, qualifications of staff, status, and employment...

    Science.gov (United States)

    2010-01-01

    ... representatives, or other employees. (2) Misrepresent, through statements or pictures, the nature or efficacy of... while the student is undergoing instruction or the role of the school in providing or arranging for such employment. (4) Misrepresent the availability or nature of any financial assistance available to students....

  8. 17 CFR 230.254 - Solicitation of interest document for use prior to an offering statement.

    Science.gov (United States)

    2010-04-01

    ... Commission, as required by paragraph (b) of this section, oral communications with prospective investors and other broadcasts are permitted. The written documents, broadcasts and oral communications are each... or other consideration, nor of any commitment, binding or otherwise, from any prospective investor...

  9. Yeast Interacting Proteins Database: YGL154C, YGL254W [Yeast Interacting Proteins Database

    Lifescience Database Archive (English)

    Full Text Available rts inactive apo-form of Lys2p (alpha-aminoadipate reductase) into catalytically active holo-form by posttranslational...ive apo-form of Lys2p (alpha-aminoadipate reductase) into catalytically active holo-form by posttranslational

  10. Civic Education and Peacebuilding: Examples from Iraq and Sudan. Special Report 254

    Science.gov (United States)

    Levine, Daniel H.; Bishai, Linda S.

    2010-01-01

    Between 2006 and 2010, the United States Institute of Peace developed several civic education programs for Iraq and Sudan as part of broader efforts to promote postconflict stability and development and help prevent a return to violence. This report describes those programs after first examining the conceptual bases for civic education and how…

  11. Kuue kuuga on EAS toetanud uusi ideid 2,54 miljardi krooniga / Ülari Alamets

    Index Scriptorium Estoniae

    Alamets, Ülari, 1967-

    2009-01-01

    Ettevõtluse Arendamise Sihtasutus on enam arendanud tehnoloogia arenduskeskuseid, ettevõtete tootearendusprojekte, investeeringuid külakeskkonda ning kohalike avalike teenuste arendamist. Lisa: Põlvamaa suuremad projektid

  12. 40 CFR 98.254 - Monitoring and QA/QC requirements.

    Science.gov (United States)

    2010-07-01

    ... specified by the manufacturer. (c) For flare or sour gas flow meters, operate and maintain the flow meter... by reference, see § 98.7). (d) Determine flare gas composition using any of the following methods. (1... by reference, see § 98.7). (e) Determine flare gas higher heating value using any of the...

  13. Yeast Interacting Proteins Database: YBR254C, YKR068C [Yeast Interacting Proteins Database

    Lifescience Database Archive (English)

    Full Text Available oepiphyseal dysplasia tarda (SEDL) disorder Rows with this bait as bait (2) Rows with this bait as prey (0) YKR068C BET3 Hydrophilic...Rows with this bait as prey (0) Prey ORF YKR068C Prey gene name BET3 Prey description Hydrophilic protein th

  14. High-frame-rate, motion-compensated 25.4 megapixel image sensor

    Science.gov (United States)

    Kamasz, Stacy R.; Farrier, Michael G.; Ma, Shing-Fat F.; Sabila, Robert W.; Chamberlain, Savvas G.

    1994-05-01

    The applicability of large-area full-frame CCD image sensor technology to large optical format aerial reconnaissance applications has been recently demonstrated. The requirements of low-contrast, high-resolution imaging at high frame rates have generated the need for a manufacturable, multitap, small-pitch, wafer-scale CCD image sensor technology. The added requirement of incorporation of electronic motion compensation at the focal plane has generated the need for multisegmented full-frame area array architectures. Characterization results from the newly developed 5040 X 5040 element, eight-tap, full-frame image sensor with multisegmentation for electronic motion compensation are discussed. Experimental determination of resistive-capacitive time constants for metal strapped vertical clock busses on wafer-scale sensors is discussed.

  15. TASK 2.5.4 DEVELOPMENT OF AN ENERGY SAVINGS CALCULATOR

    Energy Technology Data Exchange (ETDEWEB)

    Miller, William A [ORNL; New, Joshua Ryan [ORNL; Desjarlais, Andre Omer [ORNL; Huang, Joe [Lawrence Berkeley National Laboratory (LBNL); Erdem, Ender [Lawrence Berkeley National Laboratory (LBNL); Ronnen, Levinson [Lawrence Berkeley National Laboratory (LBNL)

    2010-03-01

    California s major energy utilities and the California Energy Commission (CEC) are seeking to allocate capital that yields the greatest return on investment for energy infrastructure that meets any part of the need for reliable supplies of energy. The utilities are keenly interested in knowing the amount of electrical energy savings that would occur if cool roof color materials are adopted in the building market. To meet this need the Oak Ridge National Laboratory and the Lawrence Berkeley National Laboratory (LBNL) have been collaborating on a Public Interest Energy Research (PIER) project to develop an industry-consensus energy-savings calculator. The task was coordinated with an ongoing effort supported by the DOE to develop one calculator to achieve both the DOE and the EPA objectives for deployment of cool roof products. Recent emphasis on domestic building energy use has made the work a top priority by the Department of Energy s (DOE) Building Technologies Program. The Roof Savings Calculator (RSC) tool is designed to help building owners, manufacturers, distributors, contractors and practitioners easily run complex simulations. The latest web technologies and usability design were employed to provide an easy input interface to an annual simulation of hour-by-hour, whole-building performance using the world-class simulation tools DOE-2.1E and AtticSim. Building defaults were assigned based on the best available statistical evidence and can provide energy and cost savings after the user selects nothing more than the building location. A key goal for the tool is to promote the energy benefits of cool color tile, metal and asphalt shingle roof products and other energy saving systems. The RSC tool focuses on applications for the roof and attic; however, the code conducts a whole building simulation that puts the energy and heat flows of the roof and attic into the perspective of the whole house. An annual simulation runs in about 30 sec. In addition to cool reflective roofs, the RSC tool will simulate high- medium- and low-slope roofs, and has a custom selection for the user whose house has a unique inclination. There is an option for above sheathing ventilation, which is prevalent in tile and stone-coated metal roof assemblies. The tool also accommodates the effects of radiant barriers and low-emittance surfaces in the inclined air space above the sheathing. The practitioner can select to have air-conditioning ducts either in the conditioned space or in the attic. If in the attic, the user can select one of three air leakage options. Option 1 is an inspected duct having 4% leakage and code level of duct insulation; option 2 is a poorly insulated duct having 14% air leakage; and option 3 is a custom leakage rate specified by the user. The practitioner can setup multiple layers of ceiling insulation. AtticSim is benchmarked against the field data acquired for Ft. Irwin located near Barstow, CA, first as a standalone simulation program and then again integrated within the DOE-2.1E program. The standalone benchmark was very useful to determining how well AtticSim replicates the building physics of an attic. The coupled benchmark was useful to verify that the DOE-2.1E/AtticSim code is modeling correctly the dynamic relationship between the attic and the occupied space below, as well as the interactions between the attic and the HVAC system, in particular when the ducts are located in the attic.

  16. Bibliography of Ground-Water References for All 254 Counties in Texas, 1886-2001

    Science.gov (United States)

    2005-01-01

    1759): TEXAS BOARD OF WATER ENGINEERS MISCELLANEOUS PUBLI- CATION 173, 1937. A FEW NOTES REGARDING GROUND WATER IN BROWNSVILLE- SAN BENITO -LA FERIA...EL PASO, TEXAS: USGS OPEN-FILE REPORT (UNNUMBERED), 1957. PRELIMINARY GEOHYDROLOGICAL STUDY OF THE JUAREZ VALLEY AND SURROUNDING AREAS, STATE OF... JUAREZ , MEXICO, MEXICO AREA: USGS OPEN-FILE REPORT (UNNUMBERED), 1967. USE OF WELLS TO LOWER THE WATER TABLE ALONG RELOCATED CHANNEL OF RIO GRANDE IN

  17. 30 CFR 254.47 - Determining the volume of oil of your worst case discharge scenario.

    Science.gov (United States)

    2010-07-01

    ... drilling operations, the size of your worst case discharge scenario is the daily volume possible from an... break. You must calculate this volume as follows: (1) Add the pipeline system leak detection time to...

  18. 40 CFR 97.254 - Compliance with CAIR SO2 emissions limitation.

    Science.gov (United States)

    2010-07-01

    ... sulfur dioxide emissions, determined in accordance with subpart HHH of this part, from all CAIR SO2 units... subpart HHH of this part, from all CAIR SO2 units at the source for the control period; or (ii) If...

  19. 40 CFR 96.254 - Compliance with CAIR SO2 emissions limitation.

    Science.gov (United States)

    2010-07-01

    ... sulfur dioxide emissions, determined in accordance with subpart HHH of this part, from all CAIR SO2 units... subpart HHH of this part, from all CAIR SO2 units at the source for the control period; or (ii) If...

  20. Inactivation of avirulent Yersinia pestis in Butterfield's phosphate buffer and frankfurters by UVC (254 nm) and gamma radiation.

    Science.gov (United States)

    Sommers, Christopher H; Cooke, Peter H

    2009-04-01

    Yersinia pestis is the causative agent of plague. Although rare, pharyngeal plague in humans has been associated with consumption or handling of meat prepared from infected animals. The risks of contracting plague from consumption of deliberately contaminated food are currently unknown. Gamma radiation is a penetrating form of electromagnetic radiation, and UVC radiation is used for decontamination of liquids or food surfaces. Gamma radiation D10-values (the radiation dose needed to inactivate 1 log unit pathogen) were 0.23 (+/-0.01) and 0.31 (+/-0.03) kGy for avirulent Y. pestis inoculated into Butterfield's phosphate buffer and onto frankfurter surfaces, respectively, at 0 degree C. A UVC radiation dose of 0.25 J/cm2 inactivated avirulent Y. pestis suspended in Butterfield's phosphate buffer. UVC radiation doses of 0.5 to 4.0 J/cm2 inactivated 0.97 to 1.20 log units of the Y. pestis surface inoculated onto frankfurters. A low gamma radiation dose of 1.6 kGy could provide a 5-log reduction and a UVC radiation dose of 1 to 4 J/cm2 would provide a 1-log reduction of Y. pestis surface inoculated onto frankfurters. Y. pestis was capable of growth on frankfurters during refrigerated storage (10 degrees C). Gamma radiation of frankfurters inhibited the growth of Y. pestis during refrigerated storage, and UVC radiation delayed the growth of Y. pestis.

  1. 75 FR 21299 - Determination of Regulatory Review Period for Purposes of Patent Extension; VIMPAT-NDA 22-254

    Science.gov (United States)

    2010-04-23

    ... human drug product VIMPAT (lacosamide). VIMPAT injection is indicated as adjunctive therapy in the... drug product. FDA records indicate that the effective date of the first IND for lacosamide was May...

  2. SU-E-J-254: Utility of Pinnacle Dynamic Planning Module Utilizing Deformable Image Registration in Adaptive Radiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Jani, S [Sharp Memorial Hospital, San Diego, CA (United States)

    2014-06-01

    Purpose For certain highly conformal treatment techniques, changes in patient anatomy due to weight loss and/or tumor shrinkage can result in significant changes in dose distribution. Recently, the Pinnacle treatment planning system added a Dynamic Planning module utilizing Deformable Image Registration (DIR). The objective of this study was to evaluate the effectiveness of this software in adapting to altered anatomy and adjusting treatment plans to account for it. Methods We simulated significant tumor response by changing patient thickness and altered chin positions using a commercially-available head and neck (H and N) phantom. In addition, we studied 23 CT image sets of fifteen (15) patients with H and N tumors and eight (8) patients with prostate cancer. In each case, we applied deformable image registration through Dynamic Planning module of our Pinnacle Treatment Planning System. The dose distribution of the original CT image set was compared to the newly computed dose without altering any treatment parameter. Result was a dose if we did not adjust the plan to reflect anatomical changes. Results For the H and N phantom, a tumor response of up to 3.5 cm was correctly deformed by the Pinnacle Dynamic module. Recomputed isodose contours on new anatomies were within 1 mm of the expected distribution. The Pinnacle system configuration allowed dose computations resulting from original plans on new anatomies without leaving the planning system. Original and new doses were available side-by-side with both CT image sets. Based on DIR, about 75% of H and N patients (11/15) required a re-plan using new anatomy. Among prostate patients, the DIR predicted near-correct bladder volume in 62% of the patients (5/8). Conclusions The Dynamic Planning module of the Pinnacle system proved to be an accurate and useful tool in our ability to adapt to changes in patient anatomy during a course of radiotherapy.

  3. Final Environmental Assessment for the Closure of the Garland ANG Station 254th Combat Communications Group Garland, Texas

    Science.gov (United States)

    2009-07-01

    to their non-flammability, chemical stability, high boiling point , and electrical insulating properties, PCBs were used in hundreds of industrial and...public review at the Garland Central Library, 625 Austin Street, Garland. Additionally, the notice provided a point of contact to request individual...State Historic Preservation Officer, the Executive Director of the Texas Historical Commission ( THC ). Our review staff, led by William McWhorter

  4. Extraction studies of selected actinide ions from aqueous solutions with 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione and tri-n-octylphosphine oxide

    Energy Technology Data Exchange (ETDEWEB)

    Hannink, N.J.; Hoffman, D.C. [Lawrence Berkeley Lab., CA (United States)]|[California Univ., Berkeley, CA (United States). Dept. of Chemistry; Smith, B.F. [Los Alamos National Lab., NM (United States)

    1991-11-01

    The first measurements of distribution coefficients (K{sub d}) for Cm(III), Bk(III), Cf(III), Es(III), and Fm(III) between aqueous perchlorate solutions and solutions of 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT) and the synergist tri-n-octylphosphine oxide (TOPO) in toluene are reported. Curium-243, berkelium-250, californium-249, einsteinium-254, and fermium-253 were used in these studies. The K{sub d} for {sup 241}Am was also measured and is in agreement with previously published results. Our new results show that the K{sub d}`s decrease gradually with increasing atomic number for the actinides with a dip at Cf. In general, the K{sub d}`s for these actinides are about a factor of 5 to 10 greater than the K{sub d}`s for the homologous lanthanides at a pH of 2.9, a BMPPT concentration of 0.2 M, and a TOPO concentration of 0.04 M. The larger K{sub d}`s for the actinides are consistent with greater covalent bonding between the actinide metal ion and the sulfur bonding site in the ligand.

  5. Extraction studies of selected actinide ions from aqueous solutions with 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione and tri-n-octylphosphine oxide

    Energy Technology Data Exchange (ETDEWEB)

    Hannink, N.J.; Hoffman, D.C. (Lawrence Berkeley Lab., CA (United States) California Univ., Berkeley, CA (United States). Dept. of Chemistry); Smith, B.F. (Los Alamos National Lab., NM (United States))

    1991-11-01

    The first measurements of distribution coefficients (K{sub d}) for Cm(III), Bk(III), Cf(III), Es(III), and Fm(III) between aqueous perchlorate solutions and solutions of 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT) and the synergist tri-n-octylphosphine oxide (TOPO) in toluene are reported. Curium-243, berkelium-250, californium-249, einsteinium-254, and fermium-253 were used in these studies. The K{sub d} for {sup 241}Am was also measured and is in agreement with previously published results. Our new results show that the K{sub d}'s decrease gradually with increasing atomic number for the actinides with a dip at Cf. In general, the K{sub d}'s for these actinides are about a factor of 5 to 10 greater than the K{sub d}'s for the homologous lanthanides at a pH of 2.9, a BMPPT concentration of 0.2 M, and a TOPO concentration of 0.04 M. The larger K{sub d}'s for the actinides are consistent with greater covalent bonding between the actinide metal ion and the sulfur bonding site in the ligand.

  6. Extraction studies of selected actinide ions from aqueous solutions with 4-benzoyl-2,4-Dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione and Tri-n-octylphosphine oxide

    Energy Technology Data Exchange (ETDEWEB)

    Hannink, N.J.; Hoffman, D.C. [Lawrence Berkeley Lab., CA (United States); Smith, B.F. [Los Alamos National Lab., NM (United States)

    1992-07-01

    The first measurements of distribution coefficients (k{sub d}) for Cm(III), Bk(III), Cf(III), Es(III), and Fm(III) between aqueous perchlorate solutions and solutions of 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT) and the synergist tri-n-octylphosphine oxide (TOPO) in toluene are reported. Curium-243, berkelium-250, californium-249, einsteinium-254, and fermium-253 were used in these studies. The K{sub d} for {sup 241}Am was also measured and is in agreement with previously published results. Our new results show that the K{sub d}`s decrease gradually with increasing atomic number for the actinides with a dip at Cf. In general, the K{sub d}`s for these actinides are about about a factor of 10 greater than the K{sub d}`s for the homologous lanthanides at a pH of 2.9, a BMPPT concentration of 0.2 M, and a TOPO concentration of 0.04 M. The larger K{sub d}`s for the actinides are consistent with greater covalent bonding between the actinide metal ion and the sulfur bonding site in the ligand. 9 refs., 2 figs., 1 tab.

  7. Comment on ``State-specific unimolecular reaction of NO2 just above the dissociation threshold'' [J. Chem. Phys. 99, 254 (1993)

    Science.gov (United States)

    Wittig, C.; Ionov, S. I.

    1994-03-01

    Spectroscopic studies of NO2 photoinitiated unimolecular decomposition by Miyawaki et al. indicate a very loose transition state just above threshold. If extrapolated to higher energies, this contradicts our time resolved studies of NO2 photodissociation that demonstrate a tighter transition state. We point out that both sets of data are consistent with variational RRKM theory, which predicts tightening of the transition state with increasing energy.

  8. N-(2-Chlorophenyl-2-({5-[4-(methylsulfanylbenzyl]-4-phenyl-4H-1,2,4-triazol-3-yl}sulfanylacetamide

    Directory of Open Access Journals (Sweden)

    Hoong-Kun Fun

    2011-08-01

    Full Text Available In the title molecule, C24H21ClN4OS2, the central 1,2,4-triazole ring forms dihedral angles of 89.05 (9, 86.66 (9 and 82.70 (10° with the chloro-substituted benzene ring, the methylsulfanyl-substituted benzene ring and the phenyl ring, respectively. In the crystal, molecules are linked into sheets parallel to (100 by intermolecular N—H...N and weak C—H...O hydrogen bonds.

  9. 2-[5-(4-Methoxyphenyl-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl]-6-methyl-1,3-benzothiazole

    Directory of Open Access Journals (Sweden)

    Hoong-Kun Fun

    2011-09-01

    Full Text Available In the title compound, C24H21N3OS, the pyrazole ring makes dihedral angles of 5.40 (7 and 6.72 (8° with the benzo[d]thiazole ring system and the benzene ring, respectively, and a dihedral angle of 85.72 (8° with the methoxy-substituted benzene ring. In the crystal structure, the molecules are linked by C—H...π interactions.

  10. 47 CFR 25.254 - Special requirements for ancillary terrestrial components operating in the 1610-1626.5 MHz/2483.5...

    Science.gov (United States)

    2010-10-01

    ... terrestrial component to be used in conjunction with a mobile-satellite service system using CDMA technology... in these bands must demonstrate that mobile terminals shall: (1) Meet the requirements contained in... EIRP limit of −57.1 dBW/30 kHz at the edge of the licensed MSS frequency assignment. (4) ATC...

  11. National Program for Inspection of Non-Federal Dams. Stockwell Brook Dam (NH 00261), NHWRB 254.09, Merrimack River Basin, Wilton, New Hampshire. Phase I Inspection Report.

    Science.gov (United States)

    1979-04-01

    04. U4.O:,. V-4 4 W W404 - N CUe *MkN jNNW mN .~ ymP r.n qr * ~ N -’"D-8 CS4 b S m-om CD am A* U f~zfz Ctj owowmzwz 0 U-.JL-JM~- eZW IrOWN(DDoa IN...r N f (A - 0 k IOD M t CO 0n N 0 - 0> in 1D ) U) 0 CD n ) 0U If) 0 InC b’ 0 n CD U’) F- ~0In0~DIAIA0I0IA0n0InDU)0or. D-18 _____ A2 L/01 ’AE _to...OD0 0Ol W14DTCIJ m V - NNN~O)Ow’JOco S S S BS a a 5 5 a a a oS NN)~N~~a-~inI\\OV.d -- 4-4 a~ (%J 0(Y W D 1D (ACI %JM ’A) W1D P ( V 01m CL CD(J NNU)0-N

  12. (E-tert-Butyl 2-(5-{[4-(dimethylaminophenyl]diazenyl}-2,6-dioxo-1H-pyrimidin-3-ylacetate dichloromethane monosolvate

    Directory of Open Access Journals (Sweden)

    Robert H. E. Hudson

    2014-05-01

    Full Text Available In the title compound, C18H23N5O4·CH2Cl2, the dichloromethane solvent molecule is disordered over two sets of sites in a 0.630 (13:0.370 (13 ratio. The dihedral angle between the uracil and phenyl rings is 30.2 (1°. In the crystal, the principal interactions are N—H...O hydrogen bonds, which link uracil units across centres of symmetry, forming eight-membered rings with an R22(8 graph-set motif. The structure also displays C—H...O and C—H...Cl hydrogen bonds. Intramolecular C—H...O short contacts are also observed.

  13. SU-E-T-254: Optimization of GATE and PHITS Monte Carlo Code Parameters for Uniform Scanning Proton Beam Based On Simulation with FLUKA General-Purpose Code

    Energy Technology Data Exchange (ETDEWEB)

    Kurosu, K [Department of Radiation Oncology, Osaka University Graduate School of Medicine, Osaka (Japan); Department of Medical Physics ' Engineering, Osaka University Graduate School of Medicine, Osaka (Japan); Takashina, M; Koizumi, M [Department of Medical Physics ' Engineering, Osaka University Graduate School of Medicine, Osaka (Japan); Das, I; Moskvin, V [Department of Radiation Oncology, Indiana University School of Medicine, Indianapolis, IN (United States)

    2014-06-01

    Purpose: Monte Carlo codes are becoming important tools for proton beam dosimetry. However, the relationships between the customizing parameters and percentage depth dose (PDD) of GATE and PHITS codes have not been reported which are studied for PDD and proton range compared to the FLUKA code and the experimental data. Methods: The beam delivery system of the Indiana University Health Proton Therapy Center was modeled for the uniform scanning beam in FLUKA and transferred identically into GATE and PHITS. This computational model was built from the blue print and validated with the commissioning data. Three parameters evaluated are the maximum step size, cut off energy and physical and transport model. The dependence of the PDDs on the customizing parameters was compared with the published results of previous studies. Results: The optimal parameters for the simulation of the whole beam delivery system were defined by referring to the calculation results obtained with each parameter. Although the PDDs from FLUKA and the experimental data show a good agreement, those of GATE and PHITS obtained with our optimal parameters show a minor discrepancy. The measured proton range R90 was 269.37 mm, compared to the calculated range of 269.63 mm, 268.96 mm, and 270.85 mm with FLUKA, GATE and PHITS, respectively. Conclusion: We evaluated the dependence of the results for PDDs obtained with GATE and PHITS Monte Carlo generalpurpose codes on the customizing parameters by using the whole computational model of the treatment nozzle. The optimal parameters for the simulation were then defined by referring to the calculation results. The physical model, particle transport mechanics and the different geometrybased descriptions need accurate customization in three simulation codes to agree with experimental data for artifact-free Monte Carlo simulation. This study was supported by Grants-in Aid for Cancer Research (H22-3rd Term Cancer Control-General-043) from the Ministry of Health, Labor and Welfare of Japan, Grants-in-Aid for Scientific Research (No. 23791419), and JSPS Core-to-Core program (No. 23003). The authors have no conflict of interest.

  14. N′-Benzylidene-2-({5-[(4-chlorophenoxymethyl]-4-phenyl-4H-1,2,4-triazol-3-yl}sulfanylacetohydrazide hemihydrate

    Directory of Open Access Journals (Sweden)

    Joel T. Mague

    2016-04-01

    Full Text Available The title compound, C24H20ClN5O2S·0.5H2O, has three independent molecules in the asymmetric unit and two water molecules of crystallization, one of which is equally disordered over two sites. The three unique organic molecules differ in the conformations of the substituents on the pyrazole ring. In the crystal, extensive O—H...O, O—H...N, N—H...O and C—H...O hydrogen bonding generates a three-dimensional network and C—H...π interactions are also observed.

  15. Collecting high-order interactions in an effective pairwise intermolecular potential using the hydrated ion concept: The hydration of Cf{sup 3+}

    Energy Technology Data Exchange (ETDEWEB)

    Galbis, Elsa; Pappalardo, Rafael R.; Marcos, Enrique Sánchez, E-mail: sanchez@us.es [Departmento de Química Física, Universidad de Sevilla, 41012 Seville (Spain); Hernández-Cobos, Jorge [Instituto de Ciencias Físicas, UNAM, Apartado Postal 48-3, 62251 Cuernavaca (Mexico)

    2014-06-07

    This work proposes a new methodology to build interaction potentials between a highly charged metal cation and water molecules. These potentials, which can be used in classical computer simulations, have been fitted to reproduce quantum mechanical interaction energies (MP2 and BP86) for a wide range of [M(H{sub 2}O){sub n}]{sup m+}(H{sub 2}O){sub ℓ} clusters (n going from 6 to 10 and ℓ from 0 to 18). A flexible and polarizable water shell model (Mobile Charge Density of Harmonic Oscillator) has been coupled to the cation-water potential. The simultaneous consideration of poly-hydrated clusters and the polarizability of the interacting particles allows the inclusion of the most important many-body effects in the new polarizable potential. Applications have been centered on the californium, Cf(III) the heaviest actinoid experimentally studied in solution. Two different strategies to select a set of about 2000 structures which are used for the potential building were checked. Monte Carlo simulations of Cf(III)+500 H{sub 2}O for three of the intermolecular potentials predict an aquaion structure with coordination number close to 8 and average R{sub Cf−−O} in the range 2.43–2.48 Å, whereas the fourth one is closer to 9 with R{sub Cf−−O} = 2.54 Å. Simulated EXAFS spectra derived from the structural Monte Carlo distribution compares fairly well with the available experimental spectrum for the simulations bearing 8 water molecules. An angular distribution similar to that of a square antiprism is found for the octa-coordination.

  16. Growth of Corylus heterophylla × C.avellana ‘84-254’and Corylus heterophylla × C.avellana ‘PingOu 1 10’in Fushun Region%杂交榛84-254和平欧110在抚顺生长情况的研究

    Institute of Scientific and Technical Information of China (English)

    马春放

    2015-01-01

    杂交榛(Corylus heterophylla ×C avellana )是我国培育出的第一批优良榛树品种(品系),它将使我国的榛子生产从野生状态走向园艺化栽培。通过对这2个品种在抚顺地区生长情况的调查,结果表明:在常规的栽培管理条件下,均表现出较好的越冬能力。安全越冬的杂交榛幼树,一般栽植后第3年开始结果,榛果平均质量3~3.5 g,比野生平榛大3~4倍;杂交榛的果壳厚度比野生平榛薄0.1~0.2 mm;杂交榛果实的出仁率为42%~45%,比野生平榛高1.7~1.8倍。%Corylus heterophylla × C.avellana is the first excellent species (strain)of hazelnut,it will make our country’s hazelnut production from wild to horticultural cultivation.Growth of two varieties in Fushun region was investigated.Result shows that:under conventional cultivation and management conditions,they appear optimal win-tering capacity.Overwintered saplings of Corylus heterophylla × C.avellana bear fruit in the third year after the planting.Average quality of hazelnut is 3-3.5 g,which are 3-4 times larger than that of wild Corylus heterophylla ;thickness of nut shell for hybrid hazel is 0.1-0.2 mm thinner than that of wild Corylus heterophylla ;kernel real rate of hybrid hazelnut is from 42% to 45%,which is 1.7-1.8 times higher than that of the wild Corylus heterophylla .

  17. No 2965, No 254. Report on new energy technologies and carbon dioxide sequestration: scientifical and technical aspects; N. 2965, N. 254. Rapport sur les nouvelles technologies de l'energie et la sequestration du dioxyde de carbone: aspects scientifiques et techniques

    Energy Technology Data Exchange (ETDEWEB)

    Bataille, Ch.; Birraux, C

    2006-03-15

    The abatement of CO{sub 2} emissions is a huge technical and economical challenge. Fossil fuels, which represent 88% of the world primary energy consumption, are the main source of the 25 billions of CO{sub 2} released each year in the atmosphere. The mastery of CO{sub 2} emissions cannot come from a single technology but must result from the simultaneous implementation of several means, like the development of carbon-free energies and the mastery of fossil fuel emissions. The opportunities of progress are numerous and compatible with the economic development. This document presents, first, the different greenhouse gases, the CO{sub 2} emissions per country and the main sources of CO{sub 2} emissions (power and heat generation, transports). Then it presents different ways of abatement of CO{sub 2} emissions: clean coal technologies, gas combined cycles, CO{sub 2} sequestration, reduction of fuel consumption in transports, development of carbon-free energies: wind power, solar photovoltaic for decentralized power generation, nuclear energy for a competitive power generation and for CO{sub 2} abatement, biofuels of 2. generation and fuel cells. The conclusion stresses on the investments needed for the renewal and increase of energy capacities, and on the necessary visibility and moderation of emission abatement mechanisms (carbon trading and CO{sub 2} prices). (J.S.)

  18. 254学校规模与资源利用效率矩阵研究--BCG矩阵在学校管理中的应用%Matrix Research on the Scales of 254 Schools and the Efficiency of Resources Using--the Application of CG Matrix in School Management

    Institute of Scientific and Technical Information of China (English)

    帅相志; 刘思锋

    2004-01-01

    美国波斯顿咨询公司的BCG矩阵建立了企业的相对市场占有率和销售增长率综合评价的矩阵模型,也可以借鉴到教育领域引出学校规模和资源利用效率的横向比较模型(η-M矩阵).按此模型可对学校进行质和量相结合的评价,对于学校管理以及教育行政具有重要参考价值.

  19. 78 FR 21567 - Installation of Radiation Alarms for Rooms Housing Neutron Sources

    Science.gov (United States)

    2013-04-11

    ... californium-252 (Cf-252). A licensee's decision to use a specific type of source may depend upon cost, availability, and the dependence upon historical data with which to compare current measurement results. The...

  20. A new shipping container for an intense neutron emitter

    Energy Technology Data Exchange (ETDEWEB)

    Bigelow, J.E.; Alexander, C.W.; Pace, J.V. III; Simmons, C.M.

    1994-06-01

    Californium-252 is an intense neutron emitter (2.34 {times} 10{sup 12} n/s{center_dot}g) used in medicine, research, and industry. The western world`s sole source of this rare radioisotope is the Californium Facility at Oak Ridge National Laboratory`s Radiochemical Engineering Development Center (REDC). A project has been initiated at the REDC to design a new Type B Californium Shipping Container. This effort is essential for future transportation of californium to meet the needs of users all over the world. The shipping container must meet all requirements for transport by motor freight, air, vessel, and rail, both domestic and foreign. There are unique problems in the design, fabrication, and licensing of a new Type B shipping container that will accommodate up to 60 milligrams of californium-252. One of the first challenges in the design phase of the project is the selection of a material to shield the high neutron flux. The more stringent safety precautions of today`s world impel us to consider more exotic materials for such a purpose. The candidate materials must be examined not just for their neutron shielding properties, but also in conjunction with other properties such as thermal and structural requirements to withstand the hypothetical accident conditions. The design and building of such a container is a formidable task requiring much planning. The licensing process, with the complex, interactive federal codes, is a special challenge and may be the biggest on the project in terms of time and money.

  1. Engineering of a highly efficient Xe₂*-excilamp (xenon excimer lamp, λmax=172 nm, η=40%) and qualitative comparison to a low-pressure mercury lamp (LP-Hg, λ=185/254 nm) for water purification.

    Science.gov (United States)

    Al-Gharabli, Samer; Engeßer, Patrick; Gera, Diana; Klein, Sandra; Oppenländer, Thomas

    2016-02-01

    Excilamps are mercury-free gas-discharge sources of non-coherent VUV or UV radiation with high radiant power and a long lifetime. The most efficient excilamp that is currently available on the market is a VUV xenon excilamp system (Xe2(*)-excimer lamp, λ(max) = 172 nm) with a stated radiant efficiency η of 40% at an electrical input power P(el) of 20 W, 50 W or 100 W. In this paper, the use of this highly efficient Xe2(*)-excilamp (P(el) = 20 W) for water treatment is demonstrated using a recirculating laboratory photoreactor system with negative radiation geometry. The efficiency in the 172 nm initiated bleaching of aqueous solutions of Rhodamine B is compared to that initiated by a common low-pressure mercury (LP-Hg) lamp (185 nm, TNN 15/32). The dependence of the pseudo zero order rate constant k´ of decolorization of RhB on the flow rate and on the initial concentration of RhB was investigated. Both lamps exhibited dependences of k´ on the initial concentration of RhB, which represents a typical saturation kinetical behavior. The saturation kinetics was very prominent in the case of the Xe2(*)-excilamp. Also, the Xe2(*)-excilamp treatment exhibited a significant influence on the flow rate of the RhB aqueous solution, which was not the case during the LP-Hg lamp initiated bleaching of RhB. The results of this paper demonstrate that Xe2(*)-excilamps can be used for VUV-initiated water purification. However, to reach the maximum efficacy of the Xe2(*)-excilamp for photo-initiated water purification further engineering optimization of the photoreactor concept is necessary.

  2. A complexa convivência humana e os processos educativos libertadores (The human coexistence and the process of the liberating education - DOI: 10.5752/P.2175-5841.2013v11n29p254

    Directory of Open Access Journals (Sweden)

    Sergio Rogerio Junqueira

    2013-03-01

    Full Text Available Este artigo objetiva traçar o itinerário da educação libertadora na realidade social brasileira e refletir sobre a necessidade de se repensar a ação dessa modalidade de educação nos dias atuais. Ao se articular a realidade da época do surgimento da educação libertadora, que pretendia  responder aos apelos de libertação dos povos Latino-Americanos, com a realidade dos tempos atuais e suas implicações, este artigo busca respostas às questões postas por essa educação libertadora na atualidade. Para abordar as funções do processo educativo dentro do contexto de uma sociedade, é preciso situar as abordagens em sua realidade, contemporizando e adequando as suas ações. Essa temática representa um grande desafio, pois a concepção libertadora de educação extrapola os ambientes acadêmicos, visando sobretudo o bem comum do ser humano e o seu pleno desenvolvimento. Para a realização deste trabalho foram realizadas pesquisas bibliográficas e estudo da realidade desta época informatizada em que estamos inseridos, assim como suas consequências. Palavras-chave: Conscientização. Emancipação. Informatização. Educação Libertadora. Abstract This article aims to trace the route of liberating education in Brazilian social reality and reflect on the need to rethink the action of this type of education these days. In order to articulate the onset of liberating education that intended to respond to calls for liberation of Latin American peoples with the reality of the present time and its implications, this article seeks to answer to the questions posed by this liberating education today. To address the functions of the educational process within the context of a society, one must situate the approaches in their reality, compromising and adapting their actions. This theme represents a great challenge because the conception of such liberating education goes beyond the academic environments, seeking above all, the common good of the human being and its full development. The methodology used in this paper consisted of bibliographical research and a study of the reality of this computerized era in which we operate. Keywords: Awareness Empowerment. Information Technology. Liberating Education. 

  3. A Faceted Catalogue Aids Doctoral-Level Searchers. A Review of: Olson, Tod A. “Utility of a Faceted Catalog for Scholarly Research” Library Hi Tech 25.4 (2007: 550-61.

    Directory of Open Access Journals (Sweden)

    Kurt Blythe

    2008-09-01

    Full Text Available Objective – To learn whether a faceted catalogue and word cloud aids in the discovery process. Design – User study.Setting – Large academic research library in the United States.Subjects – Twelve PhD candidates in the humanities, the majority of whom are engaged with researching, proposing, or writing their dissertations.Methods – The library’s entire catalogue of 5.2 million records was loaded into the AquaBrowser OPAC search interface. A pilot study was conducted using three humanities graduate students employed by the library. Following the pilot, the main study was conducted using graduate students in the humanities. Graduate students in the social sciences were desired for the study, but were not able to be contacted due to time constraints. Once selected, the test subjects were asked to use an interface that offered both facets and tag clouds for enhanced search quality. Test subjects were allowed to choose the topic they would like to research; all chose to research their dissertation topic. A moderator and recorder facilitated research conducted with the faceted catalogue. The moderator ensured that students commented on their findings, cleared up any confusion with using the interface, and kept the students on task. Only when students remarked that a new discovery had been made were those discoveries noted. The impact to the discovery process of faceted navigation and AquaBrowser’s word cloud was studied while the impact of relevance ranking was not.Main Results – The article asserts that results from both the pilot and main study were sufficiently similar to justify combining them for the paper, but the advantage that students employed by thelibrary might have over other students is not discussed. Nine of the twelve students used in the study found new results using the faceted catalogue and word cloud. The responses of the user group to the faceted catalogue and word cloud were “overwhelmingly positive” (555. However, since students were allowed to move freely between the word cloud and faceted navigation tool, it is difficult to attribute new discoveries solely to one or the other. However, when a new discovery could be “attributed primarily to one factor or another” (555 it was noted. The faceted navigation tool aided discovery at least four times and the word cloud aided discovery at least six.Conclusion – A faceted catalogue interface with a word cloud feature clearly aids in the discovery process for more advanced researchers — those with specialized subject knowledge, familiarity with their library’s collection, and experience in researching their area. However, facets and word clouds have limitations: records with limited cataloguing have little to offer faceted navigation; catalogue records from diverse providers introduce controlled vocabularies beyond LCSH and MeSH into searchreturns, resulting in the same word potentially appearing multiple times in the same return albeit with different meanings; the word cloud may contain certain words that researchers feel to be irrelevant. Despite these issues, the use of word clouds and faceted navigation (and relevance ranking appears to be beneficial to research conducted by experienced subject searchers in the humanities.

  4. SU-E-J-254: Evaluating the Role of Mid-Treatment and Post-Treatment FDG-PET/CT in Predicting Progression-Free Survival and Distant Metastasis of Anal Cancer Patients Treated with Chemoradiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, H; Wang, J; Chuong, M; D’Souza, W; Choi, W; Lu, W [University of Maryland School of Medicine, Baltimore, MD (United States); Latifi, K; Hoffe, S; Moros, E [Moffitt Cancer Center, Tampa, FL (United States); Saeed, Nadia [Brwon University, Providence, RI (United States); Tan, S [Huazhong University of Science & Technology, Wuhan (China); Shridhar, R [Florida Hospital, Orlando, FL (United States)

    2015-06-15

    Purpose: To evaluate the role of mid-treatment and post-treatment FDG-PET/CT in predicting progression-free survival (PFS) and distant metastasis (DM) of anal cancer patients treated with chemoradiotherapy (CRT). Methods: 17 anal cancer patients treated with CRT were retrospectively studied. The median prescription dose was 56 Gy (range, 50–62.5 Gy). All patients underwent FDG-PET/CT scans before and after CRT. 16 of the 17 patients had an additional FDG-PET/CT image at 3–5 weeks into the treatment (denoted as mid-treatment FDG-PET/CT). 750 features were extracted from these three sets of scans, which included both traditional PET/CT measures (SUVmax, SUVpeak, tumor diameters, etc.) and spatialtemporal PET/CT features (comprehensively quantify a tumor’s FDG uptake intensity and distribution, spatial variation (texture), geometric property and their temporal changes relative to baseline). 26 clinical parameters (age, gender, TNM stage, histology, GTV dose, etc.) were also analyzed. Advanced analytics including methods to select an optimal set of predictors and a model selection engine, which identifies the most accurate machine learning algorithm for predictive analysis was developed. Results: Comparing baseline + mid-treatment PET/CT set to baseline + posttreatment PET/CT set, 14 predictors were selected from each feature group. Same three clinical parameters (tumor size, T stage and whether 5-FU was held during any cycle of chemotherapy) and two traditional measures (pre- CRT SUVmin and SUVmedian) were selected by both predictor groups. Different mix of spatial-temporal PET/CT features was selected. Using the 14 predictors and Naive Bayes, mid-treatment PET/CT set achieved 87.5% accuracy (2 PFS patients misclassified, all local recurrence and DM patients correctly classified). Post-treatment PET/CT set achieved 94.0% accuracy (all PFS and DM patients correctly predicted, 1 local recurrence patient misclassified) with logistic regression, neural network or support vector machine model. Conclusion: Applying radiomics approach to either midtreatment or post-treatment PET/CT could achieve high accuracy in predicting anal cancer treatment outcomes. This work was supported in part by the National Cancer Institute Grant R01CA172638.

  5. Resonant two-photon ionization of phenol in methylene chloride doped solid argon using 248 nm KrF laser and 254 nm Hg lamp radiation, a comparative study. The UV/VIS absorption spectrum of phenol radical cation

    Science.gov (United States)

    Kesper, Karl; Diehl, Frank; Simon, Jens Georg Günther; Specht, Harald; Schweig, Armin

    1991-06-01

    Resonant two-photon ionization (TPI) of phenol (PhOH) has been successfully achieved in methylene chloride (CH 2Cl 2) doped solid argon using a KrF laser and a Hg resonance lamp. The result constitutes the first-time TPI of a typically organic molecule in this medium using an excimer laser as well as the first-time spectroscopic identification of PhOH +•. A qualitative model is proposed which is consistent with both the unexpected photostability of PhOH +• and the incomplete running of the TPI process in the applied medium.

  6. Changes in Financial Aid and Student Enrollment at Historically Black Colleges and Universities after the Tightening of PLUS Credit Standards: An Update for the 2013/14 School Year. REL 2017-254

    Science.gov (United States)

    Johnson, Matthew; Bruch, Julie; Gill, Brian

    2017-01-01

    In 2011 the U.S. Department of Education tightened the credit standards for Parent Loans for Undergraduate Students (PLUS). Concerned about the possible effects of this change on historically Black colleges and universities (HBCUs), Regional Educational Laboratory Mid-Atlantic's Historically Black Colleges and Universities College Completion…

  7. Analysis of the antibiotics susceptibility on 254 strains of Escherichia coli isolated from clinic%245例大肠埃希菌临床分离株药敏分析

    Institute of Scientific and Technical Information of China (English)

    胡景玉; 杜红丽; 乔艳梅; 郭连峰; 赵二强

    2012-01-01

    OBJECTIVE To understand the resistance characteristics of E. Coli in Hengshui, and to provide the basis for clinical treatment. METHODS Total 245 strains of E. Coli were collected from microbiology laboratory of Harrison International Peace Hospital (torn December, 2008 to June, 2011. Minimum inhibitory concentrations ( MICs) to 20 antibiotics of the isolates were determined by broth dilution method, and the values of MIC50 and MIC90 were calculated. RESULTS Imipenem, piperaciUin/tazobactam and cefoperazone/sulbactam showed a good antibacterial activity, and its MIC50 was 0.5μg/ml, 1μg/ ml, 0.5μg/ml, MIC90 was 2μg/ml, other drugs showed different degrees of resistance and E. Coli producing ESBLs in a higher detection rate. CONCLUSION E. Coli isolated in our hospital is multi-resistance but sensitive to imipenem, piperacillin/ tazobactam and cefoperazone/sulbactam.%目的 了解衡水地区大肠埃希菌的药敏情况,以更好的为临床用药提供依据.方法 收集了哈励逊国际和平医院微生物实验室2008年12月~2011年6月间所有送检大肠埃希菌株245例进行检测分析,采用肉汤稀释法测18种抗菌药物最低抑菌浓度(MIC)并计算其MIC50和MIC90.结果 亚胺培南、哌拉西林/他唑巴坦和头孢哌酮/舒巴坦显示良好的抗菌作用,其MIC50分别为0.5 μg/ml、1μg/ml、0.5 μg/ml; MIC90均为2 μg/ml,其他药物显示不同程度的耐药,且大肠埃希菌产ESBLs的检出率较高.结论 检出的大肠埃希菌存在多重耐药,仅对亚胺培南、哌拉西林/他唑巴坦和头孢哌酮/舒巴坦普遍敏感.

  8. Discovery of Isotopes of the Transuranium Elements with 93 <= Z <= 98

    CERN Document Server

    Fry, C

    2012-01-01

    One hundred and five isotopes of the transuranium elements neptunium, plutonium, americium, curium, berkelium and californium have so far been observed; the discovery of these isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.

  9. 用于流动注射分析悬浮液中的试剂。天然水中硫酸根的光谱测定Cmkovic,Paula Manoel等(Brazil)Quimica Nova 2002,25(2),254~258(葡萄牙文)

    Institute of Scientific and Technical Information of China (English)

    纪永亮

    2004-01-01

    本文讨论了在流动注射分析中使用一种浆状试剂的自动分析方法。通过采用氯冉酸钡法测定水中的硫酸根证明了该建议的可行性,氯冉酸钡法是以硫酸钡的沉淀为基础的。高度着色的氯冉酸根离子的释放在528nm处被监测。反应在醇介质中进行,

  10. An unusual radiation dose dependent EPR line at g{sub eff} = 2.54 in feldspars: possible evidence of Fe{sup 3+}O{sup 2-} {r_reversible} Fe{sup 2+}O{sup -} and exchange coupled Fe{sup 3+}-Fe{sup 2+}-nO{sup -}

    Energy Technology Data Exchange (ETDEWEB)

    Sastry, M D [Physical Research Laboratory, Navrangpura, Ahmedabad, 380 009 (India); Nagar, Y C [Physical Research Laboratory, Navrangpura, Ahmedabad, 380 009 (India); Bhushan, B [Food Technology Division, Bhabha Atomic Research Center, Trombay, Mumbai, 400 085 (India); Mishra, K P [Radiation Biology and Health Sciences, Bhabha Atomic Research Center, Mumbai, 400 085 (India); Balaram, V [Geochemistry Division, National Geophysical Research Institute, Hyderabad, 500 007 (India); Singhvi, A K [Physical Research Laboratory, Navrangpura, Ahmedabad, 380 009 (India)

    2008-01-16

    We report electron paramagnetic resonance (EPR) results on natural feldspar grains extracted from sediment samples of three widely different source regions. The XRD analysis indicated that the samples had albite, microcline and Ca/Ba-orthoclase as the major constituents. The EPR spectrum of all the samples exhibited an intense line around g{sub eff} = 4.3. This is characteristic of Fe{sup 3+} with a zero field splitting that is significantly larger than the microwave quantum. More interesting was the presence of a strong EPR signal in the region of g{sub eff} = 2.54-2.7. On irradiation with gamma rays the position of the line shifted to higher magnetic field. The possible origin of this line and its unusual behavior with dose is explained as being due to the interaction of a hopping 'hole' on oxygen with iron centers. The possibilities considered include (1) the valence fluctuation of an Fe{sup 3+} center at a tetrahedral site (2) oscillation of FeO{sub 4}{sup -} between two resonant forms, Fe{sup 2+}O{sup -} and Fe{sup 3+}O{sup 2-}, and (3) exchange coupling between Fe{sup 3+}, Fe{sup 2+} and O{sup -}. The concentration of the latter is dose dependent and, consequently, it results in the observed dose dependent line shift.

  11. Comment on "Nanosecond laser textured superhydrophobic metallic surfaces and their chemical sensing applications" by Duong V. Ta, Andrew Dunn, Thomas J. Wasley, Robert W. Kay, Jonathan Stringer, Patrick J. Smith, Colm Connaughton, Jonathan D. Shephard (Appl. Surf. Sci. 357 (2015) 248-254)

    Science.gov (United States)

    Boinovich, L. B.; Emelyanenko, A. M.; Emelyanenko, K. A.; Domantovsky, A. G.; Shiryaev, A. A.

    2016-08-01

    Nowadays the problem of design of durable ecologically friendly superhydrophobic surfaces is of great importance for science and technology. A recent paper in Applied Surface Science reports the method of fabricating the superhydrophobic metallic surfaces by infrared nanosecond laser surface texturing without using hydrophobic agents. Since this method of surface texturing can be considered as one of the most suitable for various industrial applications, the nature of superhydrophobic state of surfaces produced by laser texturing in the abovementioned paper deserves to be analyzed in detail. Authors of the commented paper attributed the change in wettability to the partial deoxidation of CuO into Cu2O on the surface during storage in atmosphere. However, such interpretation of the results contradicts to the basic notions in the theory of wetting and to more accurate and detailed data. In our Comment we discuss these contradictions point by point.

  12. Measurement of the energy spectra of fission fragments using nuclear track detectors and digital image processing

    Energy Technology Data Exchange (ETDEWEB)

    Espinosa, Guillermo; Golzarri, Jose I. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, A.P. 20-364, Mexico D.F. 01000 (Mexico); Castano, Victor M., E-mail: castano@fata.unam.m [Centro de Fisica Aplicada y Tecnologia Avanzada, Universidad Nacional Autonoma de Mexico, Boulevard Juriquilla 3001, Santiago de Queretaro, Queretaro 76230 (Mexico)

    2010-08-15

    Energy spectra of fission fragments were determined using a Nuclear Track Methodology (NTM) supported by digital image analysis and numerical data processing using a standard personal computer. The analysis of a californium ({sup 252}Cf) spectrum with this approach shows improvement compared with the values reported previously using the standard procedure, in terms of resolution and accuracy. This new method adds full automation to the technical advantages and cost effectiveness of an NTM.

  13. 75 FR 3240 - Center for Scientific Review; Notice of Closed Meetings

    Science.gov (United States)

    2010-01-20

    ... Health, 6701 Rockledge Drive, Room 3166, MSC 7770, Bethesda, MD 20892, 301-254-9975, helmersk@csr.nih.gov... Rockledge Drive, Room 3166, MSC 7770, Bethesda, MD 20892, 301-254-9975, helmersk@csr.nih.gov . (Catalogue...

  14. 78 FR 9404 - Center for Scientific Review; Notice of Closed Meetings

    Science.gov (United States)

    2013-02-08

    ...-254-9975, helmersk@csr.nih.gov . Name of Committee: Center for Scientific Review Special Emphasis... Rockledge Drive, Room 3166, MSC 7770, Bethesda, MD 20892, 301-254-9975, helmersk@csr.nih.gov . Name...

  15. 老年高血压患者临床特点分析

    Institute of Scientific and Technical Information of China (English)

    董吉云

    2010-01-01

    目的 了解老年高血压的临床特点.方法 分析254例老年高血压患者的临床资料.结果 254例老年高血压中单纯收缩期高血压54.7%(139/254),脉压差>60 mmHg占57%(145/254),合并2型糖尿病37%(94/254),合并脑卒中68.8%(175/254),24 h尿蛋白0.5~2.0g占38.5%(98/254),高尿酸血症占25.5%(65/254),体位性低血压占32%(82/254),高脂血症73.2%(186/254),左室肥厚、心肌供血不足、心力衰竭62.5%(159/254),高血压合并糖尿病患者中脑卒中患病占82.9%(78/94)、24 h尿蛋白0.5~2.0 g占74.4%(70/94),合并心脑肾损害占80%(204/254),需2种以上降压药治疗占79.1%(201/254).结论 老年高血压患者中,单纯收缩期高血压所占比例大,脉压差大,并发症多且严重,易发生体位性低血压,多需2种以上降压药联合治疗.

  16. TOWARD AN IMPROVED UNDERSTANDING OF STRUCTURE AND MAGNETISM IN NEPTUNIUM AND PLUTONIUM PHOSPHONATES AND SULFONATES

    Energy Technology Data Exchange (ETDEWEB)

    Albrecht-Schmitt, Thomas

    2012-03-01

    This grant supported the exploratory synthesis of new actinide materials with all of the actinides from thorium to californium with the exceptions of protactinium and berkelium. We developed detailed structure-property relationships that allowed for the identification of novel materials with selective ion-exchange, selective oxidation, and long-range magnetic ordering. We found novel bonding motifs and identified periodic trends across the actinide series. We identified structural building units that would lead to desired structural features and novel topologies. We also characterized many different spectroscopic trends across the actinide series. The grant support the preparation of approximately 1200 new compounds all of which were structurally characterized.

  17. Detection of rare earth elements in Powder River Basin sub-bituminous coal ash using laser-induced breakdown spectroscopy (LIBS)

    Energy Technology Data Exchange (ETDEWEB)

    Tran, Phuoc [National Energy Technology Lab. (NETL), Pittsburgh, PA, (United State; Mcintyre, Dustin [National Energy Technology Lab. (NETL), Pittsburgh, PA, (United State

    2015-10-01

    We reported our preliminary results on the use of laser-induced breakdown spectroscopy to analyze the rare earth elements contained in ash samples from Powder River Basin sub-bituminous coal (PRB-coal). We have identified many elements in the lanthanide series (cerium, europium, holmium, lanthanum, lutetium, praseodymium, promethium, samarium, terbium, ytterbium) and some elements in the actinide series (actinium, thorium, uranium, plutonium, berkelium, californium) in the ash samples. In addition, various metals were also seen to present in the ash samples

  18. NONDESTRUCTIVE IDENTIFICATION OF CHEMICAL WARFARE AGENTS AND EXPLOSIVES BY NEUTRON GENERATOR-DRIVEN PGNAA

    Energy Technology Data Exchange (ETDEWEB)

    T. R. Twomey; A. J. Caffrey; D. L. Chichester

    2007-02-01

    Prompt gamma-ray neutron activation analysis (PGNAA) is now a proven method for the identification of chemical warfare agents and explosives in military projectiles and storage containers. Idaho National Laboratory is developing a next-generation PGNAA instrument based on the new Ortec Detective mechanically-cooled HPGe detector and a neutron generator. In this paper we review PGNAA analysis of suspect chemical warfare munitions, and we discuss the advantages and disadvantages of replacing the californium-252 radioisotopic neutron source with a compact accelerator neutron generator.

  19. An ECR Charge Breeder for the 252 Cf Fission Source Project (CARIBU) at ATLAS%ATLAS用于CARIBU项目的ECR离子剥离器

    Institute of Scientific and Technical Information of China (English)

    R.C.Pardo; R.Vondrasek; T.Kulevoy; V.Aseev; R.Scott; P.Suominen

    2007-01-01

    A new radioactive beam facility for ATLAS,the Californium Rare Ion Breeder Upgrade(CARIBU),is under construction.The facility will use fission fragments from a 1 Ci 252 Cf source;thermalized and collected into a low-energy beam by a helium gas catcher.In order to reaccelerate these beams.the existing ATLAS ECR-I ion source is being redesigned to function as a charge breeder source.The design and features of this charge breeder configuration is discussed and the project status described.

  20. Advanced development of the spectrum sciences Model 5005-TF, single-event test fixture

    Energy Technology Data Exchange (ETDEWEB)

    Ackermann, M.R.; Browning, J.S. (Sandia National Labs., Albuquerque, NM (USA)); Hughlock, B.W. (Boeing Aerospace and Electronics Co., Seattle, WA (USA)); Lum, G.K. (Lockheed Missiles and Space Co., Sunnyvale, CA (USA)); Tsacoyeanes, W.C. (Draper (Charles Stark) Lab., Inc., Cambridge, MA (USA)); Weeks, M.D. (Spectrum Sciences, Inc., Santa Clara, CA (USA))

    1990-09-01

    This report summarizes the advanced development of the Spectrum Sciences Model 5005-TF, Single-Event Test Fixture. The Model 5005-TF uses a Californium-252 (Cf-252) fission-fragment source to test integrated circuits and other devices for the effects of single-event phenomena. Particle identification methods commonly used in high-energy physics research and nuclear engineering have been incorporated into the Model 5005-TF for estimating the particle charge, mass, and energy parameters. All single-event phenomena observed in a device under test (DUT) are correlated with an identified fission fragment, and its linear energy transfer (LET) and range in the semiconductor material of the DUT.

  1. Method for measuring multiple scattering corrections between liquid scintillators

    Science.gov (United States)

    Verbeke, J. M.; Glenn, A. M.; Keefer, G. J.; Wurtz, R. E.

    2016-07-01

    A time-of-flight method is proposed to experimentally quantify the fractions of neutrons scattering between scintillators. An array of scintillators is characterized in terms of crosstalk with this method by measuring a californium source, for different neutron energy thresholds. The spectral information recorded by the scintillators can be used to estimate the fractions of neutrons multiple scattering. With the help of a correction to Feynman's point model theory to account for multiple scattering, these fractions can in turn improve the mass reconstruction of fissile materials under investigation.

  2. PROCEEDINGS OF THE SYMPOSIUM COMMEMORATING THE 25th ANNIVERSARY OF ELEMENTS 97 and 98 HELD ON JAN. 20, 1975

    Energy Technology Data Exchange (ETDEWEB)

    Seaborg, Glenn T.; Street Jr., Kenneth; Thompson, Stanley G.; Ghiorso, Albert

    1976-07-01

    This volume includes the talks given on January 20, 1975, at a symposium in Berkeley on the occasion of the celebration of the 25th anniversary of the discovery of berkelium and californium. Talks were given at this symposium by the four people involved in the discovery of these elements and by a number of people who have made significant contributions in the intervening years to the investigation of their nuclear and chemical properties. The papers are being published here, without editing, in the form in which they were submitted by the authors in the months following the anniversary symposium, and they reflect rather faithfully the remarks made on that occasion.

  3. Improved charge breeding efficiency of light ions with an electron cyclotron resonance ion source

    Energy Technology Data Exchange (ETDEWEB)

    Vondrasek, R.; Kutsaev, Sergey [Argonne National Laboratory, Argonne, Illinois 60439 (United States); Delahaye, P.; Maunoury, L. [Grand Accelerateur National d' Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Blvd Henri Becquerel, 14076 Caen (France)

    2012-11-15

    The Californium Rare Isotope Breeder Upgrade is a new radioactive beam facility for the Argonne Tandem Linac Accelerator System (ATLAS). The facility utilizes a {sup 252}Cf fission source coupled with an electron cyclotron resonance ion source to provide radioactive beam species for the ATLAS experimental program. The californium fission fragment distribution provides nuclei in the mid-mass range which are difficult to extract from production targets using the isotope separation on line technique and are not well populated by low-energy fission of uranium. To date the charge breeding program has focused on optimizing these mid-mass beams, achieving high charge breeding efficiencies of both gaseous and solid species including 14.7% for the radioactive species {sup 143}Ba{sup 27+}. In an effort to better understand the charge breeding mechanism, we have recently focused on the low-mass species sodium and potassium which up to present have been difficult to charge breed efficiently. Unprecedented charge breeding efficiencies of 10.1% for {sup 23}Na{sup 7+} and 17.9% for {sup 39}K{sup 10+} were obtained injecting stable Na{sup +} and K{sup +} beams from a surface ionization source.

  4. Book Review: John M. Hobson and Leonard Seabrooke (2007) (eds) Everyday Politics of the World Economy

    DEFF Research Database (Denmark)

    Strange, Michael Stewart

    2009-01-01

    Book Review: John M. Hobson and Leonard Seabrooke (2007) (eds) Everyday Politics of the World Economy (Cambridge: Cambridge University Press), 254pp. Udgivelsesdato: 2009......Book Review: John M. Hobson and Leonard Seabrooke (2007) (eds) Everyday Politics of the World Economy (Cambridge: Cambridge University Press), 254pp. Udgivelsesdato: 2009...

  5. Dicty_cDB: VFG660 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 52294 |pid:none) Dictyocaulus viviparus elongation ... 254 2e-66 BC071619_1( BC071619 |pid:none) Homo sapien...520 ) RecName: Full=Elongation factor 1-alpha; Short... 254 2e-66 EU152294_1( EU1

  6. The Fundamental Skills Training Project

    Science.gov (United States)

    2003-08-01

    Computers in Human Behavior . 1. 59-74. Slavin, R. E. (1990). Cooperative learning and the gifted: Who benefits? Journal for the... Computers in Human Behavior , 15, 243-254. ISIS Scores on Design Experiment Subscale (Skills Test) By Skill Level 1997-1998 0% 10% 20% 30% 40% 50...word problem solving. Computers in Human Behavior , 15, 243-254. ________________________________________________________________________

  7. EST Table: FS744174 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available FS744174 E_FL_bmmt_27L11_R_0 10/09/28 62 %/254 aa ref|XP_966408.1| PREDICTED: simil...|Amel|GB13140-PA 10/09/10 62 %/254 aa gi|91091742|ref|XP_966408.1| PREDICTED: similar to AGAP000313-PA isoform 1 [Tribolium castaneum] FS744301 bmmt ...

  8. Gclust Server: 119747 [Gclust Server

    Lifescience Database Archive (English)

    Full Text Available 119747 CEL_R05H5.2_17532605 Cluster Sequences Related Sequences(24) 372 cdc-25.4: Cell Division...nces Related Sequences(24) Sequence length 372 Representative annotation cdc-25.4: Cell Division

  9. Triton and alpha-particle contribution from LiF converter for neutron dosimeter

    CERN Document Server

    Camacho, M E; Balcazar, M

    1999-01-01

    A personnel neutron dosimeter prototype based on chemical and electrochemical etched CR-39 detector, combined with LiF converter, has been calibrated using an ICRP-like phantom, under a heavy-water moderated Californium source neutron spectra; A conversion factor of 1.052+-126 spots cm sup - sup 2 mSv sup - sup 1 was obtained. The sealing properties of the detector holder showed a ten-fold reduction in radon background when it was tested in a high radon atmosphere. A convenient mechanical shock resistance was achieved in LiF converters by sintering to 11 tons pressure LiF powder at 650 deg. C, during one hour.

  10. Reliability of semiconductor and gas-filled diodes for over-voltage protection exposed to ionizing radiation

    Directory of Open Access Journals (Sweden)

    Stanković Koviljka

    2009-01-01

    Full Text Available The wide-spread use of semiconductor and gas-filled diodes for non-linear over-voltage protection results in a variety of possible working conditions. It is therefore essential to have a thorough insight into their reliability in exploitation environments which imply exposure to ionizing radiation. The aim of this paper is to investigate the influence of irradiation on over-voltage diode characteristics by exposing the diodes to californium-252 combined neutron/gamma radiation field. The irradiation of semiconductor over-voltage diodes causes severe degradation of their protection characteristics. On the other hand, gas-filled over-voltage diodes exhibit a temporal improvement of performance. The results are presented with the accompanying theoretical interpretations of the observed changes in over-voltage diode behaviour, based on the interaction of radiation with materials constituting the diodes.

  11. First results from the CARIBU facility: mass measurements on the r-process path.

    Science.gov (United States)

    Van Schelt, J; Lascar, D; Savard, G; Clark, J A; Bertone, P F; Caldwell, S; Chaudhuri, A; Levand, A F; Li, G; Morgan, G E; Orford, R; Segel, R E; Sharma, K S; Sternberg, M G

    2013-08-09

    The Canadian Penning Trap mass spectrometer has made mass measurements of 33 neutron-rich nuclides provided by the new Californium Rare Isotope Breeder Upgrade facility at Argonne National Laboratory. The studied region includes the 132Sn double shell closure and ranges in Z from In to Cs, with Sn isotopes measured out to A=135, and the typical measurement precision is at the 100 ppb level or better. The region encompasses a possible major waiting point of the astrophysical r process, and the impact of the masses on the r process is shown through a series of simulations. These first-ever simulations with direct mass information on this waiting point show significant increases in waiting time at Sn and Sb in comparison with commonly used mass models, demonstrating the inadequacy of existing models for accurate r-process calculations.

  12. Nuclear fission and the transuranium elements

    Energy Technology Data Exchange (ETDEWEB)

    Seaborg, G.T.

    1989-02-01

    Many of the transuranium elements are produced and isolated in large quantities through the use of neutrons furnished by nuclear fission reactions: plutonium (atomic number 94) in ton quantities; neptunium (93), americium (95), and curium (96) in kilogram quantities; berkelium (97) in 100 milligram quantities; californium (98) in gram quantities; and einsteinium (99) in milligram quantities. Transuranium isotopes have found many practical applications---as nuclear fuel for the large-scale generation of electricity, as compact, long-lived power sources for use in space exploration, as means for diagnosis and treatment in the medical area, and as tools in numerous industrial processes. Of particular interest is the unusual chemistry and impact of these heaviest elements on the periodic table. This account will feature these aspects. 9 refs., 5 figs.

  13. Production of highly pure einsteinium and fermium preparations

    Energy Technology Data Exchange (ETDEWEB)

    Andreev, O.I.; Tarasov, V.A.; Zotov, E.A.; Baranov, A.Yu. [Federal State Unitary Enterprise ' ' State Scientific Center of Russian Federation Research Institute of Atomic Reactors' ' (Russian Federation)

    2004-07-01

    Highly pure einsteinium and fermium preparations are in increased demand due to the progress of the following fields of modern sciences: Fundamental and applied nuclear physics. Heavy actinides are necessary for detailed study of structure and decay of a nucleus, as well as initial material both for nuclear synthesis of new superheavy elements and for manufacturing radioactive radiation sources. Fundamental and applied radiochemistry. Einsteinium and fermium preparations are required to investigate chemical properties of these hard-to-obtain elements and to improve technology of their recovery and purification. Nuclear medicine. Biologically active compounds labeled with alpha- emitting einsteinium and fermium may be applied in prospect for a radioimmunotherapy of oncological diseases. The principal method of einsteinium and fermium production is irradiation of curium or californium isotopes in a high-flux nuclear reactor. Large-scale production of transplutonium elements at RIAR enables also to produce regularly significant quantities of einsteinium and fermium. (orig.)

  14. Beta-delayed neutron spectroscopy using ion traps

    Science.gov (United States)

    Wang, Barbara; Czeszumska, A.; Siegl, K.; Caldwell, S.; Aprahamian, A.; Burkey, M.; Clark, J.; Levand, A.; Marley, S.; Morgan, G.; Norman, E.; Nystrom, A.; Orford, R.; Padgett, S.; Perez Galvan, A.; Savard, G.; Scielzo, N.; Sharma, K.; Strauss, S.

    2017-01-01

    Trapped radioactive ions suspended in vacuum allow for a new way to perform beta-delayed neutron spectroscopy. Decay branching ratios and energy spectra of the emitted neutrons are inferred from a measurement of the nuclear recoil, thereby circumventing the many limitations associated with direct neutron detection. Beta-delayed neutron measurements were carried out for 137-138,140I, 134-136Sb, and 144-145Cs at the Californium Rare Isotope Breeder Upgrade (CARIBU) facility at Argonne National Laboratory. The data collected are needed in many fields of basic and applied science such as nuclear energy, nuclear astrophysics, and stockpile stewardship. Results for the isotopes 135-136Sb and 140I will be presented. Supported by NSF under PHY-1419765, and U.S. DOE under NEUP 13-5485, DE-AC02-06CH11357 (ANL), DE-AC52-07NA27344 (LLNL), and DE-NA0000979 (NNSA).

  15. Environmental assessment of the thermal neutron activation explosive detection system for concourse use at US airports

    Energy Technology Data Exchange (ETDEWEB)

    Jones, C.G.

    1990-08-01

    This document is an environmental assessment of a system designed to detect the presence of explosives in checked airline baggage or cargo. The system is meant to be installed at the concourse or lobby ticketing areas of US commercial airports and uses a sealed radioactive source of californium-252 to irradiate baggage items. The major impact of the use of this system arises from direct exposure of the public to scattered or leakage radiation from the source and to induced radioactivity in baggage items. Under normal operation and the most likely accident scenarios, the environmental impacts that would be created by the proposed licensing action would not be significant. 44 refs., 19 figs., 18 tabs.

  16. TRIGA-TRAP: A penning trap mass spectrometer at the research reactor TRIGA Mainz

    Energy Technology Data Exchange (ETDEWEB)

    Smorra, Christian [Physikalisches Institut, Universitaet Heidelberg (Germany); Institut fuer Kernchemie, Universitaet Mainz (Germany); Blaum, Klaus [Physikalisches Institut, Universitaet Heidelberg (Germany); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Block, Michael; Herfurth, Frank [GSI, Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt (Germany); Eberhardt, Klaus [Institut fuer Kernchemie, Universitaet Mainz (Germany); Eibach, Martin; Ketelaer, Jens; Ketter, Jochen; Knuth, Konstantin; Repp, Julia [Institut fuer Physik, Universitaet Mainz (Germany); Nagy, Szilard [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany)

    2009-07-01

    Nuclear masses represent the binding energies and, therefore, the sum of all interactions in the nucleus. They provide an important input parameter to nuclear structure models. Presently, a tremendous interest in masses of very exotic neutron-rich nuclides exists to support theoretical models for the nucleosynthesis via the rapid neutron capture process. The research reactor TRIGA Mainz provides access to a large variety of neutron-rich nuclides produced by thermal-neutron induced fission of an actinide target. The double-Penning trap mass spectrometer TRIGA-TRAP will perform high-precision mass measurements in this region of the nuclear chart as well as on actinides from uranium to californium. It also serves as a test facility for the development of new techniques that will be implemented in future facilities like MATS at FAIR (GSI, Darmstadt). The layout of TRIGA-TRAP as well as recent mass measurements are presented.

  17. Populations of selected microbial and fungal species growing on the surface of rape seeds following treatment with desiccants or plant growth regulators.

    Science.gov (United States)

    Frac, Magdalena; Jezierska-Tys, Stefania; Tys, Jerzy

    2010-01-01

    The aim of this study was to determine the effects of desiccants and plant growth regulators on selected microbial species affecting rape seeds, with special emphasis on the growth of fungi and identification of the genus and species composition. The experimental material in the study was seeds of winter rape cv. Californium that were collected from the field during combine harvest. The chemical agents applied, both desiccants and growth regulators, generally decreased the populations of bacteria occurring on the surface of rape seeds. The responses of fungi depended upon the type of agent applied and were manifested as either stimulation or inhibition of the growth of the fungal species. The fungi isolated from the surface of rape seeds were characteristic of those found in the field environment (Cladosporium and Penicillium) and typical for those present on the surface of rape seeds (Alternaria).

  18. Measurements of the neutron capture cross sections and incineration potentials of minor-actinides in high thermal neutron fluxes: Impact on the transmutation of nuclear wastes; Mesures des sections efficaces de capture et potentiels d'incineration des actinides mineurs dans les hauts flux de neutrons: Impact sur la transmutation des dechets

    Energy Technology Data Exchange (ETDEWEB)

    Bringer, O

    2007-10-15

    This thesis comes within the framework of minor-actinide nuclear transmutation studies. First of all, we have evaluated the impact of minor actinide nuclear data uncertainties within the cases of {sup 241}Am and {sup 237}Np incineration in three different reactor spectra: EFR (fast), GT-MHR (epithermal) and HI-HWR (thermal). The nuclear parameters which give the highest uncertainties were thus highlighted. As a result of fact, we have tried to reduce data uncertainties, in the thermal energy region, for one part of them through experimental campaigns in the moderated high intensity neutron fluxes of ILL reactor (Grenoble). These measurements were focused onto the incineration and transmutation of the americium-241, the curium-244 and the californium-249 isotopes. Finally, the values of 12 different cross sections and the {sup 241}Am isomeric branching ratio were precisely measured at thermal energy point. (author)

  19. 78 FR 14913 - Domestic Baggage Liability

    Science.gov (United States)

    2013-03-08

    ... Notices The Administrative Procedure Act (APA) (5 U.S.C. 553) contains a ``good cause'' exemption which... LIABILITY 0 1. The authority citation for part 254 continues to read as follows: Authority: 49 U.S.C....

  20. Shorelines Extracted from 1984-2015 Landsat Imagery: Horn Island, Mississippi (Polygon: Individual Dates)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Shorelines Extracted from 1984-2015 Landsat Imagery: Horn Island, Mississippi (Polygon: Individual Dates) is a dataset consisting of 254 polygon shapefiles...

  1. Mononucleosis

    Science.gov (United States)

    ... RD, eds. Conn's Current Therapy 2016 . Philadelphia, PA: Elsevier; 2016:chap 1. Jenson HB. Epstein-Barr virus. ... Nelson Textbook of Pediatrics . 20th ed. Philadelphia, PA: Elsevier; 2015:chap 254. Johannsen EC, Kaye KM. Epstein- ...

  2. 76 FR 42140 - Public Availability of the Merit Systems Protection Board's FY 2010 Service Contract Inventory

    Science.gov (United States)

    2011-07-18

    .../contact/contracting.htm . FOR FURTHER INFORMATION CONTACT: Veronica Bullock, Merit Systems Protection...; telephone 202-254-4406; e- mail veronica.bullock@mspb.gov . William D. Spencer, Clerk of the Board....

  3. Arno Rafael Cederberg ja Eesti ajalooteadus / Hans Kruus

    Index Scriptorium Estoniae

    Kruus, Hans, 1891-1976

    2005-01-01

    Soome ajalooprofessorist Arno Rafael Cederbergist (1885-1948). Tartu Ülikoolis töötades oli tema peamine õppe-ja uurimisaine Eesti ja Põhjamaade ajalugu. Ilm.: Eesti Kirjandus, 1935, nr. 6., lk. 254-255

  4. A New Macrocyclic Trichochecene from Soil Fungus

    Institute of Scientific and Technical Information of China (English)

    TaoWANG; YiZHANG; 等

    2002-01-01

    From fermentation broth of soil fungus 254-2 obtained from Yunnan province, a new macrocylic trichochecene was isolated. The structure was determined on the basis of spectroscopie evidences especially the 2-D NMR spectra.

  5. An Assessment of Student Computer Ergonomic Knowledge.

    Science.gov (United States)

    Alexander, Melody W.

    1997-01-01

    Business students (n=254) were assessed on their knowledge of computers, health and safety, radiation, workstations, and ergonomic techniques. Overall knowledge was low in all categories. In particular, they had not learned computer-use techniques. (SK)

  6. Pobladoras, Indígenas, and the State: Difference, Equality, and Women’s Rights in Chile [book review

    OpenAIRE

    Valiente Fernández, Celia

    2004-01-01

    Este artículo reseña: Patricia Richards. Pobladoras, Indígenas, and the State: Difference, Equality, and Women’s Rights in Chile. New Brunswick: Rutgers University Press, 2004. p. 254. ISBN 0813534232

  7. 47 CFR 36.601 - General.

    Science.gov (United States)

    2010-10-01

    ..., 47 U.S.C. 254, which addresses universal service support for rural, insular, and high cost areas, low... Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES JURISDICTIONAL SEPARATIONS PROCEDURES; STANDARD PROCEDURES FOR SEPARATING TELECOMMUNICATIONS PROPERTY COSTS, REVENUES, EXPENSES,...

  8. 78 FR 69843 - Commission Information Collection Activities (Ferc-Ferc-549d); Comment Request; Extension

    Science.gov (United States)

    2013-11-21

    ... respondents is $436,254 . \\5\\ This cost represents the average cost of four career fields: Legal ($128.02/hour), Accountants ($48.58/hour), Management Analyst ($56.27/hour), and Computer and Information ($82.67/hour);...

  9. 77 FR 31377 - U.S. Extractive Industries Transparency Initiative Tribal Consultation

    Science.gov (United States)

    2012-05-25

    ... saman_hussain@ios.doi.gov . FOR FURTHER INFORMATION CONTACT: Saman Hussain at telephone number 202.254.5508, or by email at saman_hussain@ios.doi.gov . SUPPLEMENTARY INFORMATION: In 2011, President...

  10. A new macrocyclic trichochecene from soil fungus

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    From fermentation broth of soil fungus 254-2 obtained from Yunnan province,a new macrocylic trichochecene was isolated.The structure was determined on the basis of spectroscopic evidences especially the 2-D NMR spectra.

  11. Data of evolutionary structure change: 1DJ2A-1ADIA [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1DJ2A-1ADIA 1DJ2 1ADI A A IGSLSQVSGVLGCQWGDEGKGKLVDILAQHFDIVARCQG...LLSEACPLILDYHVALDNAREKARGAKAIGTTGRGIGPAYEDKVARRGLRVGDLFDKETFAEKLKEVMEYHNFQLVNYYKAEAVDYQKVLDDTMAVADI.../line> PHE CA 264 LYS CA 225 TYR CA 254 1ADI... A 1ADIA1 1ADI A 1ADI

  12. 77 FR 43106 - Tribal Consultation Sessions-Department of the Interior Information Technology Infrastructure...

    Science.gov (United States)

    2012-07-23

    ... Office of the Special Trustee in Albuquerque, NM. This amendment includes additional tribal consultation... 254, Albuquerque, NM 87104. August 21, 2012 1:30 p.m.-3:30 Hilton Sacramento p.m.. Arden West,...

  13. Learning to Predict Social Influence in Complex Networks

    Science.gov (United States)

    2012-03-29

    derived from the Enron Email Dataset by extracting the senders and the recipients and linking those that had bidirectional communications. It has 4,254...Kimura et al. (2008), which has 9, 481 nodes and 245, 044 directed links (the Wikipedia network). The third one is a network derived from the Enron ...It contains 4, 254 nodes and 44, 314 directed links (the Enron network). The last one is a coauthorship network employed in Palla et al. (2005). It

  14. Milnor open books of links of some rational surface singularities

    OpenAIRE

    Özbağcı, Burak; Bhupal, Mohan

    2011-01-01

    Pacific Journal of Mathematics MILNOR OPEN BOOKS OF LINKS OF SOME RATIONAL SURFACE SINGULARITIES MOHAN BHUPAL AND BURAK OZBAGCI Volume 254 No. 1 November 2011 PACIFIC JOURNAL OF MATHEMATICS Vol. 254, No. 1, 2011 MILNOR OPEN BOOKS OF LINKS OF SOME RATIONAL SURFACE SINGULARITIES MOHAN BHUPAL AND BURAK OZBAGCI We determine Legendrian surgery diagrams for the canonical contact struc-tures of links of rational surface singularities that are also small Seifert...

  15. Domain Modeling: NP_710141.1 [SAHG[Archive

    Lifescience Database Archive (English)

    Full Text Available NP_710141.1 chr20 Forkhead DNA-binding domain d1jxsa_ chr20/NP_710141.1/NP_710141.1..._apo_158-254.pdb d2c6ya1 chr20/NP_710141.1/NP_710141.1_holo_158-254.pdb blast 159K,162Y,163S,164Y,165I,181T,

  16. Dollar Summary of Prime Contract Awards by State, Place, and Contractor, FY84, Part 1 (Adamsville, Alabama-Santa Clara, California).

    Science.gov (United States)

    1984-01-01

    INC 167 167 C P I MACHINING CO INC 2,761 2,761 CALCOMP CORPORATION 55 55 CALIFORNIA CMPTR PRDTS INC 201 49 97 30 25 CARTWRIGHT ENGINEERING INC 6,000...UNITED MEDIA INC 28 28 UNITED STATES DEPARTMENT DEF 43 43 WALTER DORWIN TEAGUE INC 254 254 YEAGER MANUFACTURING CORF 36 36 TOTAL - ANAHEIM 1,020,504...POMONA T & T INDUSTRIES 57 57 WALTER DORWIN TEAGUE INC 2,013 2,013

  17. Abstract Reference List: Reviews of Pertinent Literature in Shock. Volume I.

    Science.gov (United States)

    1981-05-18

    CLINICAL CARDIOLOGY. PREVENTION OF CARDIOGENIC SHOCK. JS Geddes, AAJ Adgey, JF Pantridge. American Heart Journal 99:243-254, No 2, (1980...25 61. THE DYNAMICS of. THi LUNG FLUID FILTRATION SYSTHI! fN IKX;S Wl EDEMA . MH Gee, JA Spath. Circ. Res. 46(6):796-801 (1980) . . . . 26 62. LUNG...differentiation. 14. Fundamentals of clinical cardiology. Prevention of Cardiogenic Shock. JS Geddes, AAJ Adgey, and JF Pantridge. Am. H. J., 99: 243-254, 1980. It

  18. Domain Modeling: NP_958781.1 [SAHG[Archive

    Lifescience Database Archive (English)

    Full Text Available NP_958781.1 chr8 Crystal structure of a fragment of the plakin domain of plectin, C...ys to Ala mutant. p2odua_ chr8/NP_958781.1/NP_958781.1_apo_254-471.pdb p2odva_ chr8/NP_958781.1/NP_958781.1_holo_254-471.pdb blast 378K,381M,382E,385L PGO 1 ...

  19. Degradation of methyl orange using short-wavelength UV irradiation with oxygen microbubbles.

    Science.gov (United States)

    Tasaki, Tsutomu; Wada, Tsubasa; Fujimoto, Kanji; Kai, Shinji; Ohe, Kaoru; Oshima, Tatsuya; Baba, Yoshinari; Kukizaki, Masato

    2009-03-15

    A novel wastewater treatment technique using 8 W low-pressure mercury lamps in the presence of uniform-sized microbubbles (diameter = 5.79 microm) was investigated for the decomposition of methyl orange as a model compound in aqueous solution. Photodegradation experiments were conducted with a BLB black light blue lamp (365 nm), a UV-C germicidal lamp (254 nm) and an ozone lamp (185 nm+254 nm) both with and without oxygen microbubbles. The results show that the oxygen microbubbles accelerated the decolorization rate of methyl orange under 185+254 nm irradiation. In contrast, the microbubbles under 365 and 254 nm irradiation were unaffected on the decolorization of methyl orange. It was found that the pseudo-zero order decolorization reaction constant in microbubble system is 2.1 times higher than that in conventional large bubble system. Total organic carbon (TOC) reduction rate of methyl orange was greatly enhanced by oxygen microbubble under 185+254 nm irradiation, however, TOC reduction rate by nitrogen microbubble was much slower than that with 185+254 nm irradiation only. Possible reaction mechanisms for the decolorization and mineralization of methyl orange both with oxygen and nitrogen mirobubbles were proposed in this study.

  20. Removal of fluorescence and ultraviolet absorbance of dissolved organic matter in reclaimed water by solar light.

    Science.gov (United States)

    Wu, Qianyuan; Li, Chao; Wang, Wenlong; He, Tao; Hu, Hongying; Du, Ye; Wang, Ting

    2016-05-01

    Storing reclaimed water in lakes is a widely used method of accommodating changes in the consumption of reclaimed water during wastewater reclamation and reuse. Solar light serves as an important function in degrading pollutants during storage, and its effect on dissolved organic matter (DOM) was investigated in this study. Solar light significantly decreased the UV254 absorbance and fluorescence (FLU) intensity of reclaimed water. However, its effect on the dissolved organic carbon (DOC) value of reclaimed water was very limited. The decrease in the UV254 absorbance intensity and FLU excitation-emission matrix regional integration volume (FLU volume) of reclaimed water during solar light irradiation was fit with pseudo-first order reaction kinetics. The decrease of UV254 absorbance was much slower than that of the FLU volume. Ultraviolet light in solar light had a key role in decreasing the UV254 absorbance and FLU intensity during solar light irradiation. The light fluence-based removal kinetic constants of the UV254 and FLU intensity were independent of light intensity. The peaks of the UV254 absorbance and FLU intensity with an apparent molecular weight (AMW) of 100Da to 2000Da decreased after solar irradiation, whereas the DOC value of the major peaks did not significantly change.

  1. Role of physiological mechanisms and EPSPS gene expression in glyphosate resistance in wild soybeans (Glycine soja).

    Science.gov (United States)

    Gao, Yue; Tao, Bo; Qiu, Lijuan; Jin, Longguo; Wu, Jing

    2014-02-01

    The physiological mechanisms underlying glyphosate resistance in wild soybean germplasm and relevant EPSPS gene expression were evaluated. These germplasms were selected by gradually increasing glyphosate selection pressure started from 2010. As indicated by a whole-plant dose response bioassay, ZYD-254 plants were resistant to glyphosate at concentrations of 1230gaeha(-1), but the susceptible plants (ZYD-16) were unable to survive in the presence of 300gaeha(-1) glyphosate. The ED50 values of resistant germplasm were approximately 8.8 times of the susceptible germplasm. Chlorophyll content was significantly decreased in ZYD-16 plants in comparison with ZYD-254 plants. ZYD-16 plants accumulated 10.1 times more shikimate in leaves at 5days after glyphosate treatment at 1230gaeha(-1) than ZYD-254 did. GST activity differed between ZYD-254 and ZYD-16 in three tissues. It was highest in leaves. There were no significant differences in EPSPS1 or EPSPS3 expression between two germplasms before exposure to glyphosate treatment. After glyphosate treatment, there was a 2- to 4-fold increase in EPSPS1 mRNA levels in ZYD-254, but there was no change in EPSPS3 mRNA levels in ZYD-254 or ZYD-16.

  2. 紫外波长与粒径对纳米TiO2光催化效果的影响%Influence of Different UV Wavelengths and Particle Sizes on Nano-TiO2 Photocatalytic Degradation Effect

    Institute of Scientific and Technical Information of China (English)

    邱志平; 杨其长; 刘文科

    2012-01-01

    Taking methyl orange as degradation object, an experiment was carried out to study the effects of different wavelengths' UV lights and different particle sizes' TiO2(365nm UV Hght+10nm TiO2, 365nm UV light +50nm TiO2, 254nm UV light +10nm TiO2, 254nm UV light +50nm TiO2) on degradation of methyl orange. Results showed that the combination of different wavelengths' UV lights and different particle sizes' TiO2 affected the photocatalytic degradation of methyl orange. The best treatment effect was of the combination of 254nm UV light +10nm TiO2, and the degradation efficiencies of other treatments were in order of 254nm UV light +50nm TiO2, 365nm UV light+lOnm TiO2and 365nm UV light +50nm TiO2. It proved that 254nm UV light +10nm TiO2 was the optimal combination for photocatalytic degradation of methyl orange.%以甲基橙为光催化降解对象,研究了不同波长紫外灯与不同粒径TiO2组合(365 nm紫外灯+10 nm TiO2,365 nm紫外灯+50 nm TiO2,254 nm紫外灯+10 nm TiO2,254 nm紫外灯+50 nm TiO2)光催化降解甲基橙的效果.结果表明,不同波长紫外灯与不同粒径TiO2组合影响光催化降解甲基橙的效果.其中,254 nm紫外灯+10 nm TiO2组合降解效果最好,其次为254 nm紫外灯+50 nm TiO2组合,再其次为365 nm紫外灯+10 nm TiO2组合,降解效果最差的为365 nm紫外灯+50 nm TiO2组合.由此可见,254 nm紫外灯+10 nm TiO2组合的光催化降解甲基橙的效果最好.

  3. Combination of UV absorbance and electron donating capacity to assess degradation of micropollutants and formation of bromate during ozonation of wastewater effluents.

    Science.gov (United States)

    Chon, Kangmin; Salhi, Elisabeth; von Gunten, Urs

    2015-09-15

    In this study, the changes in UV absorbance at 254 nm (UVA254) and electron donating capacity (EDC) were investigated as surrogate indicators for assessing removal of micropollutants and bromate formation during ozonation of wastewater effluents. To measure the EDC, a novel method based on size exclusion chromatography followed by a post-column reaction was developed and calibrated against an existing electrochemical method. Low specific ozone doses led to a more efficient abatement of EDC than of UVA254. This was attributed to the abatement of phenolic moieties in the dissolved organic matter (DOM), which lose their EDC upon oxidation, but are partially transformed into quinones, which still absorb in the measured UV range. For higher specific ozone doses, the relative EDC abatement was lower than the relative UVA abatement, which can be explained by the oxidation of UV absorbing moieties (e.g. non-activated aromatic compounds), which contribute less to EDC. The abatement of the selected micropollutants (i.e., 17α-ethinylestradiol (EE2), carbamazepine (CBZ), atenolol (ATE), bezafibrate (BZF), ibuprofen (IBU), and p-chlorobenzoic acid (pCBA)) varied significantly depending on their reactivity with ozone in the examined specific ozone dose range of 0-1.45 mgO3/mgDOC. The decrease of EE2 and CBZ with high ozone reactivity was linearly proportional to the reduction of the relative residuals of UVA254 and EDC. The abatement of ATE, BZF, IBU, and pCBA with intermediate to low ozone reactivities was not significant in a first phase (UVA254/UVA254,0 = 1.00-0.70; EDC/EDC0 = 1.00-0.56) while their abatement was more efficient than the degradation of the relative residual UVA254 and much more noticeable than the degradation of the relative residual EDC in a second phase (UVA254/UVA254,0 = 0.70-0.25; EDC/EDC0 = 0.56-0.25) because the partially destroyed UV absorbing and electron donating DOM moieties become recalcitrant to ozone attack. Bromate formation was

  4. Incidence of Febrile Neutropenia in Korean Female Breast Cancer Patients Receiving Preoperative or Postoperative Doxorubicin/Cyclophosphamide Followed by Docetaxel Chemotherapy

    Science.gov (United States)

    Kim, Chang Gon; Sohn, Joohyuk; Chon, Hongjae; Kim, Joo Hoon; Heo, Su Jin; Cho, Hyunsoo; Kim, In Jung; Kim, Seung Il; Park, Seho; Park, Hyung Seok

    2016-01-01

    Purpose Doxorubicin/cyclophosphamide followed by docetaxel chemotherapy (AC-D) is an intermediate risk factor (incidence of 10%–20%) for febrile neutropenia (FN) in breast cancer. However, the reported incidence of FN while using this regimen was obtained mostly from Western breast cancer patients, with little data available from Asian patients. This study aimed to assess the incidence of FN in Korean breast cancer patients and to describe clinical variables related to FN. Methods From September 2010 to February 2013, data from the Yonsei Cancer Center registry of breast cancer patients who received neoadjuvant or adjuvant chemotherapy with four cycles of AC-D (60 mg/m2 doxorubicin, 600 mg/m2 cyclophosphamide every 3 weeks for four cycles followed by 75 mg/m2 or 100 mg/m2 docetaxel every 3 weeks for four cycles) were analyzed. The incidence of FN, FN associated complications, dose reduction/delays, and relative dose intensity (RDI) were investigated. Results Among the 254 patients reported to the registry, the FN incidence after AC-D chemotherapy was 29.5% (75/254), consisting of 25.2% (64/254) events during AC and 4.7% (12/254) during docetaxel chemotherapy. Dose reductions, delays, and RDI less than 85.0% during AC were observed in 16.5% (42/254), 19.5% (47/254), and 11.0% (28/254) of patients, respectively. Patients with FN events frequently experienced dose reduction/delays, which eventually led to a decreased RDI. Conclusion The incidence of FN during AC-D neoadjuvant or adjuvant chemotherapy was higher than expected in Korean breast cancer patients. Whether these patients should be classified as a high-risk group for FN warrants future prospective studies. PMID:27064666

  5. Modified Diatomaceous earth as a principal stationary phase component in TLC.

    Science.gov (United States)

    Ergül, Soner; Kadan, Imdat; Savaşci, Sahin; Ergül, Suzan

    2005-09-01

    Modified natural diatomaceous earth (DE) is a principal component of the stationary phase in normal thin-layer chromatography (TLC) applications and is mixed with commercial silica gel 60GF254 (Si-60GF254). Modification is carried out by flux calcination and refluxing with acid. Natural DE, modified DEs [flux calcinated (FC)DE and FCDE-I), and Si-60GF254 are characterized by scanning electron microscopy and Fourier-transform-IR spectroscopy. Particle size, specific surface area, pore distribution, pore volume, and surface hydroxyl group density parameters of materials are determined by various techniques. FCDE-I and Si-60GF254 are investigated for their usefulness in the stationary phase of TLC both individually and in composition. Commercially available red and blue ink samples are run on layers of Si-60GF254 and FCDE-I individually, and on various FCDE-I and Si-60GF254 mixtures. Butanol-ethanol-2M ammonia (3:1:1, v/v) and butanol-acetic acid-water (12:3:5, v/v) mixtures are used as mobile phases. The polarities of stationary phases decrease, and the retention factor (Rf) values of ink components increase when the FCDE-I content of the stationary phase increases. The properties of the stationary phase can be optimized by adding FCDE-I to Si-60GF254. This study may be useful in understanding both the systematic effects of stationary phase properties [e.g., specific surface area and surface hydroxyl group density, aOH(s)] and those of the mobile phase (e.g., polarity and acidity) on Rf values and the separability of components.

  6. Comparative effect of simulated solar light, UV, UV/H2O2 and photo-Fenton treatment (UV-Vis/H2O2/Fe2+,3+) in the Escherichia coli inactivation in artificial seawater.

    Science.gov (United States)

    Rubio, D; Nebot, E; Casanueva, J F; Pulgarin, C

    2013-10-15

    Innovative disinfection technologies are being studied for seawater, seeking a viable alternative to chlorination. This study proposes the use of H2O2/UV254 and photo-Fenton as disinfection treatment in seawater. The irradiations were carried out using a sunlight simulator (Suntest) and a cylindrical UV reactor. The efficiency of the treatment was compared for Milli-Q water, Leman Lake water and artificial seawater. The presence of bicarbonates and organic matter was investigated in order to evaluate possible effects on the photo-Fenton disinfection treatment. The photo-Fenton treatment, employing 1 mg L(-1) Fe(2+) and 10 mg L(-1) of H2O2, led to the fastest bacterial inactivation kinetics. Using H2O2/UV254 high disinfection rates were obtained similar to those obtained with photo-Fenton under UV254 light. In Milli-Q water, the rate of inactivation for Escherichia coli was higher than in Leman Lake water and seawater due to the lack of inorganic ions affecting negatively bacteria inactivation. The presence of bicarbonate showed scavenging of the OH(•) radicals generated in the treatment of photo-Fenton and H2O2/UV254. Despite the negative effect of inorganic ions, especially HCO3(-), the disinfection treatments with AOPs in lake water and seawater improved significantly the disinfection compared to light alone (simulated sunlight and UV254). In the treatment of photo-Fenton with simulated sunlight, dissolved organic matter had a beneficial effect by increasing the rate of inactivation. This is associated with the formation of Fe(3+)-organo photosensitive complexes leading to the formation of ROS able to inactivate bacteria. This effect was not observed in the photo-Fenton with UV254. Growth of E. coli surviving in seawater was observed 24 and 48 h after treatment with UV light. However, growth of surviving bacteria was not detected after photo-Fenton with UV254 and H2O2/UV254 treatments. This study suggests H2O2/UV254 and photo-Fenton treatments for the

  7. Structure-Based Mechanism for Early PLP-Mediated Steps of Rabbit Cytosolic Serine Hydroxymethyltransferase Reaction

    Directory of Open Access Journals (Sweden)

    Martino L. Di Salvo

    2013-01-01

    Full Text Available Serine hydroxymethyltransferase catalyzes the reversible interconversion of L-serine and glycine with transfer of one-carbon groups to and from tetrahydrofolate. Active site residue Thr254 is known to be involved in the transaldimination reaction, a crucial step in the catalytic mechanism of all pyridoxal 5′-phosphate- (PLP- dependent enzymes, which determines binding of substrates and release of products. In order to better understand the role of Thr254, we have expressed, characterized, and determined the crystal structures of rabbit cytosolic serine hydroxymethyltransferase T254A and T254C mutant forms, in the absence and presence of substrates. These mutants accumulate a kinetically stable gem-diamine intermediate, and their crystal structures show differences in the active site with respect to wild type. The kinetic and crystallographic data acquired with mutant enzymes permit us to infer that conversion of gem-diamine to external aldimine is significantly slowed because intermediates are trapped into an anomalous position by a misorientation of the PLP ring, and a new energy barrier hampers the transaldimination reaction. This barrier likely arises from the loss of the stabilizing hydrogen bond between the hydroxymethyl group of Thr254 and the ε-amino group of active site Lys257, which stabilizes the external aldimine intermediate in wild type SHMTs.

  8. Effect of the semi-conductive properties of the passive layer on the current provided by stainless steel microbial cathodes

    Energy Technology Data Exchange (ETDEWEB)

    Pons, Liz; Delia, Marie-Line; Basseguy, Regine [Laboratoire de Genie Chimique, CNRS - Universite de Toulouse, 4 allee Emile Monso BP 84234, 31030 Toulouse (France); Bergel, Alain, E-mail: alain.bergel@ensiacet.f [Laboratoire de Genie Chimique, CNRS - Universite de Toulouse, 4 allee Emile Monso BP 84234, 31030 Toulouse (France)

    2011-02-15

    Geobacter sulfurreducens biofilms were formed under constant polarisation at -0.6 V vs. Ag/AgCl on stainless steel cathodes to catalyse the reduction of fumarate. The time-evolution of the current strongly depended on the quality of the inoculum. Inoculating with young cells significantly shortened the initial lag-phase and using the same inoculum improved the reproducibility of the current-time curves. The whole set of experiments showed that 254SMO stainless steel provided higher current densities (on average 14.1 A/m{sup 2}) than biofilms formed on 316L stainless steel (on average 4.5 A/m{sup 2}). Biofilm coverage assessed by epifluorescent microscopy showed that coverage ratios were generally higher for 316L than for 254SMO. It must be concluded that 254SMO is more efficient in transferring electrons to bacterial cells than 316L. Mott-Schottky diagrams recorded on both materials under conditions of electrolysis in the absence of microorganisms showed that the surface oxide layers had similar n-type semi-conductive behaviour for potential values higher than the flat band potential. In contrast, 316L exhibited slight p-type behaviour at potential lower than the flat band potential, while 254SMO did not. The higher electrochemical performances of biocathodes formed on 254SMO are explained by semi-conductive properties of its passive layer, which prevented the p-type behaviour occurring in cathodic electrolysis conditions.

  9. Preparation and characterization of BaMgAl10O17:Eu phosphor coated with MgF2 by sol-gel process

    Institute of Scientific and Technical Information of China (English)

    LI Feng; WANG Yu-hua

    2005-01-01

    In order to prevent BaMgAl10 O17 : Eu (BAM) phosphor from thermal degradation, MgF2-coatings on the surface of BAM were prepared by a sol-gel process. The coatings were characterized by X-ray photoelectron spectroscopy and scanning electron microscopy. The results indicate that BAM is successfully coated with homogenous, close MgF2 coatings. The photoluminescence and anti-thermal degradation properties of coated BAM were investigated under 254 and 147 nm excitations. The optimum anti-thermal degradation properties are obtained at the mass ratio of MgF2 to BAM 0. 2% under 254 nm excitation and 0. 5% under 147 nm excitation, respectively. It is considered that trace MgO formed after baked would cause different optimum coating thicknesses under 254 and 147 nm excitations.

  10. Activated Carbon Adsorption Properties of the Residual Matters in Textile Dyeing and Printing Secondary Effluent

    Institute of Scientific and Technical Information of China (English)

    TIAN Qing; LI Fang; LIU Fang; YANG Bo; CHEN Ji-hua

    2008-01-01

    The research employed the adsorption isotherm measurement, the batch kinetic adsorption and the rapid small-scale carbon column test (RSSCT) to find out the characteristics and main impacting factors of granular activated carbon (GAC) adsorption, in treating the textile dyeing-printing/polyester alkali de-weighting secondary effluent (TSE). The adsorption affinities and capacities for the organics surrogated by CODCr, color and UV254 (UV absorbency at λ= 254 nm) predicted by isotherm, small-scale-fixed bed were discussed. Adsorption rates for CODCr, color and UV254 are much different and carbon particle size dependent. The color adsorption rate and capacity should be taken as the main consideration factors in designing bio-activated carbon filter(BACF). The breakthrough of GAC adsorption column is mainly influenced by the low MW readily adsorbable organics in TSE. UVm is a good adsorption breakthrough indicator. The study provides References for BACFs' design and operation control in textile secondary effluent (TSE) tertiary treatment.

  11. Study on Removing Organics in Water by Ozone and Activated Carbon%臭氧与活性炭结合对水中有机物去除的研究

    Institute of Scientific and Technical Information of China (English)

    俞小明; 孙妮娜

    2011-01-01

    阐明了臭氧及活性炭去除有机物的作用,以及在水处理中应用的现状。将臭氧,活性炭及臭氧-活性炭应用到水处理中,臭氧对水中的UV254、COD、TOC去除率分别为14.3%、12.5%、17%,活性炭对uV254、COD、TOC去除率分别为60.5%、52.7%、50.8%,臭氧一活性炭联合运用对水中UV254、COD、TOC去除率分别为66.8%、58.3%、65%。臭氧与活性炭的结合工艺有较好的去除效果。%This paper focuses on removing organics in water by ozone and activated as well as its present application in water treatment. Applying ozone, activated carbon and ozone - activated carbon into the water processed, the removal rate of ozone on Uv254, COD, TOC are 14. 3% , 12. 5% , 17% ; activated carbon on UV254, COD, TOC removal are 60. 5% , 52. 7% , 50. 8% ; ozone - activated carbon on UV254, COD, TOC are 66. 8% , 58.3%, 65%. The technology combining ozone and activated carbon achieved preferable results.

  12. Drug: D07269 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available D07269 Drug Dexketoprofen (INN) C16H14O3 254.0943 254.2806 D07269.gif Antiinflammat...PRODUCTS, NON-STEROIDS M01AE Propionic acid derivatives M01AE17 Dexketoprofen D07269 Dexketoprofen (INN) Tar...nase-1 (COX-1) [HSA:5742] [KO:K00509] Dexketoprofen [ATC:M01AE17] D07269 Dexketoprofen (INN) cyclooxygenase-...2 (COX-2) [HSA:5743] [KO:K11987] Dexketoprofen [ATC:M01AE17] D07269 Dexketoprofen (INN) CAS: 22161-81-5 PubC

  13. Escritos sobre cine español : tradición y géneros populares [Ressenya

    OpenAIRE

    2011-01-01

    Resenya del llibre de Pablo Pérez Rubio, Javier Hernández Ruiz, “Escritos sobre cine español : tradición y géneros populares”, Institución Fernando el Católico (Colección de letras), Zaragoza, 2011, 254 p. Review of Pablo Pérez Rubio, Javier Hernández Ruiz’s book, “Escritos sobre cine español : tradición y géneros populares”, Institución Fernando el Católico (Colección de letras), Zaragoza, 2011, 254 p.

  14. 臭氧催化氧化深度处理造纸废水研究%Experimental study on advanced treatment of papermaking wastewater with catalytic ozonation

    Institute of Scientific and Technical Information of China (English)

    王群; 叶琳嫣; 宋宏艺; 杨一; 鲁金凤; 陈盈盈; 薛宬

    2012-01-01

    In order to investigate the treatment effect of the advanced oxidation processes of papermaking wastewater treatment catalytic ozonation efficiency, the experiments were carried out using ozone alone, O3/H2O2, O3/CeO2 and O3/AC technology to study UV254, COD removal and effect of the dosage of H2O2. The results indicated that ozone oxidation had better decoloration and removal effect of UV254. Under this experimental condition, the color of the wastewater was completely faded after 10 min oxidation, and the removal of UV254 was up to 58%. With increasing the dosage of H2O2 by O3/H2O2, the removal of UV254 increased only slightly, but the COD removal was decreased. Therefore, the catalytic ozonation was not required and ozone alone may achieve better results when the use of ozone for papermaking wastewater treatment.%为了考察臭氧催化氧化深度处理工艺对造纸废水的处理效果,采用臭氧单独氧化、O/H2O2、O3/CeO2及O3/AC技术,考察其对水中UV254、COD的去除效果,同时分析了H2O2投加量对O3/H2O2氧化造纸废水效果的影响.实验结果表明,臭氧氧化具有很好的脱色及氧化水中UV254的效果;在本试验条件下,原水经过臭氧氧化10 min便可以完全褪去,UV254去除率最高可达58%左右;在O3/H2O2深度处理过程中,增加H2O2投加量只是略微提高了UV254去除率,但COD去除率反而降低.所以,在臭氧氧化某些造纸废水时,并不需要采用臭氧催化氧化技术,单独臭氧氧化便可以达到较理想效果.

  15. Bacterial growth in humic waters exposed to UV-radiation and simulated sunlight

    DEFF Research Database (Denmark)

    Corin, N.; Backlund, P.; Wiklund, T.

    1998-01-01

    Sterile filtered (0.45 mu m) humic lake water was exposed to simulated sunlight (300-800 nm) or W-radiation (254 run)for various periods of times and the dissolved organic carbon content, absorbance at 254 and 460 nm and PH were recorded. The irradiated water was inoculated with a natural bacterial...... in an increased availability of the dissolved organic material as bacterial substrate. No inhibitory effect on the bacterial growth, due to the presence of toxic organic reaction products, was observed. (C) 1998 Published by Elsevier Science Ltd....

  16. DERIVATIZED HPTLC METHOD FOR SIMULTANEOUS ESTIMATION OF GLUCOSAMINE AND IBUPROFEN IN TABLETS

    OpenAIRE

    SAM SOLOMON, RAHUL. KUMAR,VIJAI ANAND, SIVAKUMAR, VENKATNARAYANAN

    2013-01-01

    A selective, precise and derivatized HPTLC method has been developed for the simultaneous estimation of Glucosamine and Ibuprofen in tablet formulation. In this method standard and sample solutions of Glucosamine and Ibuprofen were applied on pre-coated silica gel 60F254 TLC plate, and developed using Propanol-Ethyl acetate-Ammonia-Water (4: 3: 2: 1 v/v), as mobile phase and derivatized using Iodine vapor. The drugs on the plate were scanned at 254 nm. The dynamic linearity range was 5-25 μg/...

  17. AcEST: DK947009 [AcEST

    Lifescience Database Archive (English)

    Full Text Available 2.3 sp|P17594|POLG_EMCVD Genome polyprotein OS=Encephalomyocarditis ... 32 2.3 sp|P17593|POLG_EMCVB Genome ...polyprotein OS=Encephalomyocarditis ... 32 2.3 sp|Q2IYZ6|LPXK_RHOP2 Tetraacyldisa...otein OS=Mengo encephalomyocarditis virus PE=1 SV=3 Length = 2293 Score = 31.6 bits (70), Expect = 2.3 Ident...RRHYLVKTGWRVQVQCN 254 >sp|P32540|POLG_ENMG3 Genome polyprotein (Fragment) OS=Mengo encephalomyocarditi...KPFEYIRIPLPHVLSGEDGGVFGAALRRHYLVKTGWRVQVQCN 254 >sp|P17594|POLG_EMCVD Genome polyprotein OS=Encephalomyocarditi

  18. High performance thin layer chromatographic method for simultaneous estimation of ibuprofen and pseudoephedrine hydrochloride

    Directory of Open Access Journals (Sweden)

    Chitlange S

    2008-01-01

    Full Text Available High performance thin layer chromatographic method is developed for simultaneous estimation of ibuprofen and pseudoephedrine hydrochloride in tablets. Silica gel 60F 254 plates were used as stationary phase and t.butanol: ethyl acetate: glacial acetic acid: water (7:4:2:2 v/v as mobile phase. Wavelength selected for analysis was 254 nm. Percent estimation of ibuprofen and pseudoephedrine hydrochloride was found to be 99.56% and 98.77%, respectively. Percent recovery for both the drugs was found in the range of 98.27% to 100.91%, respectively.

  19. Agronomic threshold of soil available phosphorus in grey desert soils in Xinjiang, China

    Science.gov (United States)

    Wang, B.; Liu, H.; Hao, X. Y.; Wang, X. H.; Sun, J. S.; Li, J. M.; Ma, Y. B.

    2016-08-01

    Based on 23 years of data, yields of maize, wheat and cotton were modelled under different fertilizer management practices and at different levels of available phosphorus (Olsen-P) in soil. Three types of threshold models were used, namely linear-linear (LL), linear- plateau (LP), and Mitscherlich type exponential (Exp). The agronomic thresholds of available phosphorus were 25.4 mgkg-1 for cotton, 14.8 mgkg-1 for wheat, 13.1 mgkg-1 for maize and 25.4 mgkg-1 for the grey desert soil regions of Xinjiang in China as a whole.

  20. Deep ultraviolet light-emitting diodes

    Energy Technology Data Exchange (ETDEWEB)

    Hu, X.; Deng, J.; Zhang, J.P.; Lunev, A.; Bilenko, Y.; Katona, T.; Gaska, R. [Sensor Electronic Technology, Inc., 1195 Atlas Road, Columbia, SC 29209 (United States); Shur, M.S. [Department of Electrical Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180 (United States); Shatalov, M.; Khan, A. [Department of Electrical Engineering, University of South Carolina, Columbia, SC 29208 (United States)

    2006-05-15

    We report on the development of AlGaN-based deep UV light emitting diodes (LEDs) with emission wavelengths from 254 to 340 nm, focusing on the improvement of 280 nm LEDs efficiency. Under optimal device structure the UV LEDs efficiency was found to strongly depend on the AlGaN material quality. Milliwatt-power level LEDs were demonstrated for the 254-340 nm spectral range, and for 280 nm LEDs powers reaching 2.5 mW was achieved at 20 mA DC. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  1. Reflective optical imaging system for extreme ultraviolet wavelengths

    Science.gov (United States)

    Viswanathan, V.K.; Newnam, B.E.

    1993-05-18

    A projection reflection optical system has two mirrors in a coaxial, four reflection configuration to reproduce the image of an object. The mirrors have spherical reflection surfaces to provide a very high resolution of object feature wavelengths less than 200 [mu]m, and preferably less than 100 [mu]m. An image resolution of features less than 0.05-0.1 [mu]m, is obtained over a large area field; i.e., 25.4 mm [times] 25.4 mm, with a distortion less than 0.1 of the resolution over the image field.

  2. Exceptional Family Transitional Training Program (EFTTP)

    Science.gov (United States)

    2009-01-01

    Alberta, Canada 2. American Samoa 3. Armenia 4. Athens Island, Greece 5. Baja California, Mexico 6. Berlin, Germany 7. Bogota , Colombia 8. Brazil 9... Rivers Building 121 761 Tank Battalion Road Fort Hood, TX 76544 O: 1-254-286-6585 F: 1-254-287-8428 FORT SAM HOUSTON, TX ACS-EFMP Building 2797 2010...Stanley Avenue Fort Sam Houston, TX 78234-5095 O: 1-210-221-2705 RED RIVER ARMY DEPOT, TX ACS-EFMP ATTN: AMSTA-RR-Y Building 469 Texarkana, TX 75507-5000

  3. 美国新型薄膜微能量可充电池

    Institute of Scientific and Technical Information of China (English)

    贾旭平

    2009-01-01

    @@ 2009年6月9日,美国科罗拉多州李特尔顿市一家创新固态可充式薄膜微能量电池制造商Infinite Power Solutions公司(以下简称IPS),正式推出最新的THINERGY系列微能量电池(MEC,Micro-Energy Cell),其中THINERG MEC101电池的规格仅为25.4mm×25.4mm.

  4. International Journal of Information Dissemination and Technology (IJIDT): A Bibliomatric Study

    OpenAIRE

    Kuri , Ramesh; Aadin , Tayappa

    2016-01-01

    The paper brings out the results of a Bibliomatrics analysis of the journal titled "International Journal of Information Dissemination and Technology (IJIDT)” for the period of 2011-2015. The result showed that there are 254 articles are published during in study period. Among 254 articles the study found that 93.69% of papers are multi-authored. The degree of collaboration is found to be 0.59%. The average author productivity is 1.86%. More than 26% of articles appeared on domain of “Informa...

  5. International Journal of Information Dissemination and Technology (IJIDT)

    OpenAIRE

    Kuri , Ramesh; Adin, Tayappa

    2016-01-01

    The paper brings out the results of a Bibliomatrics analysis of the journal titled "International Journal of Information Dissemination and Technology (IJIDT)” for the period of 2011-2015. The result showed that there are 254 articles are published during in study period. Among 254 articles the study found that 93.69% of papers are multi-authored. The degree of collaboration is found to be 0.59%. The average author productivity is 1.86%. More than 26% of articles appeared on dom...

  6. Neutron Detector Signal Processing to Calculate the Effective Neutron Multiplication Factor of Subcritical Assemblies

    Energy Technology Data Exchange (ETDEWEB)

    Talamo, Alberto [Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division; Gohar, Yousry [Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division

    2016-06-01

    This report describes different methodologies to calculate the effective neutron multiplication factor of subcritical assemblies by processing the neutron detector signals using MATLAB scripts. The subcritical assembly can be driven either by a spontaneous fission neutron source (e.g. californium) or by a neutron source generated from the interactions of accelerated particles with target materials. In the latter case, when the particle accelerator operates in a pulsed mode, the signals are typically stored into two files. One file contains the time when neutron reactions occur and the other contains the times when the neutron pulses start. In both files, the time is given by an integer representing the number of time bins since the start of the counting. These signal files are used to construct the neutron count distribution from a single neutron pulse. The built-in functions of MATLAB are used to calculate the effective neutron multiplication factor through the application of the prompt decay fitting or the area method to the neutron count distribution. If the subcritical assembly is driven by a spontaneous fission neutron source, then the effective multiplication factor can be evaluated either using the prompt neutron decay constant obtained from Rossi or Feynman distributions or the Modified Source Multiplication (MSM) method.

  7. On-line charge breeding using ECRIS and EBIS

    Science.gov (United States)

    Vondrasek, Richard

    2016-06-01

    The efficient and rapid production of a high-quality, pure beam of highly charged ions is at the heart of any radioactive ion beam facility. Whether an electron cyclotron resonance (ECR) ion source or an electron beam ion source (EBIS) is used to produce these highly charged ions, their operating characteristics will set the boundaries on the range of experiments which can be performed. In addition, time structure and duty cycle have to be considered when defining the operating parameters of the accelerator system as a whole. At Argonne National Laboratory (ANL), an ECR charge breeder was developed as part of the Californium Rare Ion Breeder Upgrade (CARIBU) program. The charge breeding efficiency and high charge state production of the source is at the forefront of ECR charge breeders, but its overall performance as part of the accelerator system is limited by pervasive background and relatively long breeding times. As such, an EBIS charge breeder has been developed and is running in an off-line configuration. It has already demonstrated good breeding efficiencies, shorter residence times, and reduced background and is scheduled to replace the ECR charge breeder in late 2015. The resultant change in duty cycle and time structure necessitates changes to the overall operation of the facility. The experiences with these breeders, as well as from several other facilities which already utilize an ECR or EBIS for charge breeding, help to define the operational characteristics of each technology - their strengths, their weaknesses, and the possible paths to improvement.

  8. γ -soft Ba146 and the role of nonaxial shapes at N90

    Energy Technology Data Exchange (ETDEWEB)

    Mitchell, A. J.; Lister, C. J.; McCutchan, E. A.; Albers, M.; Ayangeakaa, A. D.; Bertone, P. F.; Carpenter, M. P.; Chiara, C. J.; Chowdhury, P.; Clark, J. A.; Copp, P.; David, H. M.; Deo, A. Y.; DiGiovine, B.; D' Olympia, N.; Dungan, R.; Harding, R. D.; Harker, J.; Hota, S. S.; Janssens, R. V. F.; Kondev, F. G.; Liu, S. H.; Ramayya, A. V.; Rissanen, J.; Savard, G.; Seweryniak, D.; Shearman, R.; Sonzogni, A. A.; Tabor, S. L.; Walters, W. B.; Wang, E.; Zhu, S.

    2016-01-01

    Low-spin states in the neutron-rich, N=90 nuclide Ba146 were populated following β decay of Cs146, with the goal of clarifying the development of deformation in barium isotopes through delineation of their nonyrast structures. Fission fragments of Cs146 were extracted from a 1.7-Ci Cf252 source and mass selected using the CAlifornium Rare Ion Breeder Upgrade (CARIBU) facility. Low-energy ions were deposited at the center of a box of thin β detectors, surrounded by a highly efficient high-purity Ge array. The new Ba146 decay scheme now contains 31 excited levels extending up to ~2.5 MeV excitation energy, double what was previously known. These data are compared to predictions from the interacting boson approximation (IBA) model. It appears that the abrupt shape change found at N=90 in Sm and Gd is much more gradual in Ba and Ce, due to an enhanced role of the γ degree of freedom.

  9. Significant relationships among frost tolerance and net photosynthetic rate, water use efficiency and dehydrin accumulation in cold-treated winter oilseed rapes.

    Science.gov (United States)

    Urban, Milan Oldřich; Klíma, Miroslav; Vítámvás, Pavel; Vašek, Jakub; Hilgert-Delgado, Alois Albert; Kučera, Vratislav

    2013-12-15

    Five winter oilseed rape cultivars (Benefit, Californium, Cortes, Ladoga, Navajo) were subjected to 30 days of cold treatment (4 °C) to examine the effect of cold on acquired frost tolerance (FT), dehydrin (DHN) content, and photosynthesis-related parameters. The main aim of this study was to determine whether there are relationships between FT (expressed as LT50 values) and the other parameters measured in the cultivars. While the cultivar Benefit accumulated two types of DHNs (D45 and D35), the other cultivars accumulated three additional DHNs (D97, D47, and D37). The similar-sized DHNs (D45 and D47) were the most abundant; the others exhibited significantly lower accumulations. The highest correlations were detected between LT50 and DHN accumulation (r=-0.815), intrinsic water use efficiency (WUEi; r=-0.643), net photosynthetic rate (r=-0.628), stomatal conductance (r=0.511), and intracellular/intercellular CO2 concentration (r=0.505). Those cultivars that exhibited higher Pn rate in cold (and further a significant increase in WUEi) had higher levels of DHNs and also higher FT. No significant correlation was observed between LT50 and E, PRI, or NDVI. Overall, we have shown the selected physiological parameters to be able to distinguish different FT cultivars of winter oilseed rape.

  10. Studies of Beta-Delayed Neutron Emission using Trapped Ions

    Science.gov (United States)

    Siegl, Kevin; Aprahamian, A.; Scielzo, N. D.; Savard, G.; Clark, J. A.; Levand, A. F.; Burkey, M.; Caldwell, S.; Czeszumska, A.; Hirsh, T. Y.; Kolos, K.; Marley, S. T.; Morgan, G. E.; Norman, E. B.; Nystrom, A.; Orford, R.; Padgett, S.; Pérez Galván, A.; Sh, K. S.; Strauss, S. Y.; Wang, B. S.

    2017-01-01

    Using a radio-frequency quadrupole ion trap to confine radioactive ions allows indirect measurements of beta-delayed neutron (BDN) emission. By determining the recoil energy of the beta-decay daughter ions it is possible to study BDN emission, as the neutron emission can impart a significantly larger nuclear recoil than from beta-decay alone. This method avoids most of the systematic uncertainties associated with direct neutron detection but introduces dependencies on the specifics of the decay and interactions of the ion with the RF fields. The decays of seven BDN precursors were studied using the Beta-decay Paul Trap (BPT) to confine fission fragments from the Californium Rare Isotope Breeder Upgrade (CARIBU) facility at Argonne National Laboratory. The analysis of these measurements and results for the branching ratios and neutron energy spectra will be presented. Supported by the NSF under grant PHY-1419765, and the U.S. DOE under the NEUP project 13-5485, contracts DE-AC02-06CH11357 (ANL) and DE-AC52-07NA27344 (LLNL), and award DE-NA0000979 (NNSA).

  11. Production of Medical Radioisotopes in the ORNL High Flux Isotope Reactor (HFIR) for Cancer Treatment and Arterial Restenosis Therapy after PTCA

    Science.gov (United States)

    Knapp, F. F. Jr.; Beets, A. L.; Mirzadeh, S.; Alexander, C. W.; Hobbs, R. L.

    1998-06-01

    The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL) represents an important resource for the production of a wide variety of medical radioisotopes. In addition to serving as a key production site for californium-252 and other transuranic elements, important examples of therapeutic radioisotopes which are currently routinely produced in the HFIR for distribution include dysprosium-166 (parent of holmium-166), rhenium-186, tin-117m and tungsten-188 (parent of rhenium-188). The nine hydraulic tube (HT) positions in the central high flux region permit the insertion and removal of targets at any time during the operating cycle and have traditionally represented a major site for production of medical radioisotopes. To increase the irradiation capabilities of the HFIR, special target holders have recently been designed and fabricated which will be installed in the six Peripheral Target Positions (PTP), which are also located in the high flux region. These positions are only accessible during reactor refueling and will be used for long-term irradiations, such as required for the production of tin-117m and tungsten-188. Each of the PTP tubes will be capable of housing a maximum of eight HT targets, thus increasing the total maximum number of HT targets from the current nine, to a total of 57. In this paper the therapeutic use of reactor-produced radioisotopes for bone pain palliation and vascular brachytherapy and the therapeutic medical radioisotope production capabilities of the ORNL HFIR are briefly discussed.

  12. Recovery and chemical purification of actinides at JRC, Karlsruhe

    Science.gov (United States)

    Bokelund, H.; Apostolidis, C.; Glatz, J.-P.

    1989-07-01

    The application of actinide elements in research and in technology is many times subject to rather stringent purity requirements; often a nuclear grade quality is specified. The additional possible demand for a high isotopic purity is a special feature in the handling of these elements. The amount of actinide elements contained in or adhering to materials declared as waste should be low for safety reasons and out of economic considerations. The release of transuranium elements to the environment must be kept negligible. For these and for other reasons a keen interest in the separation of actinides from various materials exists, either for a re-use through recycling, or for their safe confinement in waste packages. This paper gives a short review of the separation methods used for recovery and purification of actinide elements over the past years in the European Institute for Transuranium Elements. The methods described here involve procedures based on precipitation, ion exchange or solvent extraction; often used in a combination. The extraction methods were preferably applied in a Chromatographie column mode. The actinide elements purified and/or separated from each other by the above methods include uranium, neptunium, plutonium, americium, curium, and californium. For the various elements the work was undertaken with different aims, ranging from reprocessing and fabrication of nuclear fuels on a kilogramme scale, over the procurement of alpha-free waste, to the preparation of neutron sources of milligramme size.

  13. Production of medical radioisotopes in the ORNL High Flux Isotope Reactor (HFIR) for cancer treatment and arterial restenosis therapy after PTCA

    Energy Technology Data Exchange (ETDEWEB)

    Knapp, F.F. Jr.; Beets, A.L.; Mirzadeh, S.; Alexander, C.W.; Hobbs, R.L.

    1998-06-01

    The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL) represents an important resource for the production of a wide variety of medical radioisotopes. In addition to serving as a key production site for californium-252 and other transuranic elements, important examples of therapeutic radioisotopes which are currently routinely produced in the HFIR for distribution include dysprosium-166 (parent of holmium-166), rhenium-186, tin-117m and tungsten-188 (parent of rhenium-188). The nine hydraulic tube (HT) positions in the central high flux region permit the insertion and removal of targets at any time during the operating cycle and have traditionally represented a major site for production of medical radioisotopes. To increase the irradiation capabilities of the HFIR, special target holders have recently been designed and fabricated which will be installed in the six Peripheral Target Positions (PTP), which are also located in the high flux region. These positions are only accessible during reactor refueling and will be used for long-term irradiations, such as required for the production of tin-117m and tungsten-188. Each of the PTP tubes will be capable of housing a maximum of eight HT targets, thus increasing the total maximum number of HT targets from the current nine, to a total of 57. In this paper the therapeutic use of reactor-produced radioisotopes for bone pain palliation and vascular brachytherapy and the therapeutic medical radioisotope production capabilities of the ORNL HFIR are briefly discussed.

  14. Compensated bismuth-loaded plastic scintillators for neutron detection using low-energy pseudo-spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Dumazert, Jonathan, E-mail: jonathan.dumazert@cea.fr [CEA, LIST, Laboratoire Capteurs Architectures Electroniques, 91191 Gif-sur-Yvette (France); Coulon, Romain; Bertrand, Guillaume H.V.; Normand, Stéphane [CEA, LIST, Laboratoire Capteurs Architectures Electroniques, 91191 Gif-sur-Yvette (France); Méchin, Laurence [CNRS, UCBN, Groupe de Recherche en Informatique, Image, Automatique et Instrumentation de Caen, 14050 Caen (France); Hamel, Matthieu [CEA, LIST, Laboratoire Capteurs Architectures Electroniques, 91191 Gif-sur-Yvette (France)

    2016-05-21

    Gadolinium-covered modified plastic scintillators show a high potential for the deployment of cost-effective neutron detectors. Taking advantage of the low-energy photon and electron signature of thermal neutron captures in gadolinium-155 and gadolinium-157 however requires a background correction. In order to display a trustable rate, dual compensation schemes appear as an alternative to Pulse Shape Discrimination. This paper presents the application of such a compensation scheme to a two-bismuth loaded plastic scintillator system. A detection scintillator interacts with incident photon and fast neutron radiations and is covered with a gadolinium converter to become thermal neutron-sensitive as well. In the meantime, an identical compensation scintillator, covered with terbium, solely interacts with the photon and fast neutron part of incident radiations. After the acquisition and the treatment of the counting signals from both sensors, a hypothesis test determines whether the resulting count rate after subtraction falls into statistical fluctuations or provides a robust image of neutron activity. A laboratory prototype is tested under both photon and neutron radiations, allowing us to investigate the performance of the overall compensation system. The study reveals satisfactory results in terms of robustness to a cesium-137 background and in terms of sensitivity in presence of a californium-252 source.

  15. Fast neutron tomography with real-time pulse-shape discrimination in organic scintillation detectors

    Science.gov (United States)

    Joyce, Malcolm J.; Agar, Stewart; Aspinall, Michael D.; Beaumont, Jonathan S.; Colley, Edmund; Colling, Miriam; Dykes, Joseph; Kardasopoulos, Phoevos; Mitton, Katie

    2016-10-01

    A fast neutron tomography system based on the use of real-time pulse-shape discrimination in 7 organic liquid scintillation detectors is described. The system has been tested with a californium-252 source of dose rate 163 μSv/h at 1 m and neutron emission rate of 1.5×107 per second into 4π and a maximum acquisition time of 2 h, to characterize two 100×100×100 mm3 concrete samples. The first of these was a solid sample and the second has a vertical, cylindrical void. The experimental data, supported by simulations with both Monte Carlo methods and MATLAB®, indicate that the presence of the internal cylindrical void, corners and inhomogeneities in the samples can be discerned. The potential for fast neutron assay of this type with the capability to probe hydrogenous features in large low-Z samples is discussed. Neutron tomography of bulk porous samples is achieved that combines effective penetration not possible with thermal neutrons in the absence of beam hardening.

  16. A review of neutron scattering correction for the calibration of neutron survey meters using the shadow cone method

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Sang In; Kim, Bong Hwan; Kim, Jang Lyul; Lee, Jung Il [Health Physics Team, Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2015-12-15

    The calibration methods of neutron-measuring devices such as the neutron survey meter have advantages and disadvantages. To compare the calibration factors obtained by the shadow cone method and semi-empirical method, 10 neutron survey meters of five different types were used in this study. This experiment was performed at the Korea Atomic Energy Research Institute (KAERI; Daejeon, South Korea), and the calibration neutron fields were constructed using a {sup 252}Californium ({sup 252}Cf) neutron source, which was positioned in the center of the neutron irradiation room. The neutron spectra of the calibration neutron fields were measured by a europium-activated lithium iodide scintillator in combination with KAERI's Bonner sphere system. When the shadow cone method was used, 10 single moderator-based survey meters exhibited a smaller calibration factor by as much as 3.1 - 9.3% than that of the semi-empirical method. This finding indicates that neutron survey meters underestimated the scattered neutrons and attenuated neutrons (i.e., the total scatter corrections). This underestimation of the calibration factor was attributed to the fact that single moderator-based survey meters have an under-ambient dose equivalent response in the thermal or thermal-dominant neutron field. As a result, when the shadow cone method is used for a single moderator-based survey meter, an additional correction and the International Organization for Standardization standard 8529-2 for room-scattered neutrons should be considered.

  17. Active Neutron Interrogation of Non-Radiological Materials with NMIS

    Energy Technology Data Exchange (ETDEWEB)

    Walker, Mark E [ORNL; Mihalczo, John T [ORNL

    2012-02-01

    The Nuclear Materials Identification System (NMIS) at Oak Ridge National Laboratory (ORNL), although primarily designed for analyzing special nuclear material, is capable of identifying nonradiological materials with a wide range of measurement techniques. This report demonstrates four different measurement methods, complementary to fast-neutron imaging, which can be used for material identification: DT transmission, DT scattering, californium transmission, and active time-tagged gamma spectroscopy. Each of the four techniques was used to evaluate how these methods can be used to identify four materials: aluminum, polyethylene, graphite, and G-10 epoxy. While such measurements have been performed individually in the past, in this project, all four measurements were performed on the same set of materials. The results of these measurements agree well with predicted results. In particular, the results of the active gamma spectroscopy measurements demonstrate the technique's applicability in a future version of NMIS which will incorporate passive and active gamma-ray spectroscopy. This system, designated as a fieldable NMIS (FNMIS), is under development by the US Department of Energy Office of Nuclear Verification.

  18. X-ray Measurements of a Thermo Scientific P385 DD Neutron Generator

    Energy Technology Data Exchange (ETDEWEB)

    E.H. Seabury; D.L. Chichester; A.J. Caffrey; J. Simpson; M. Lemchak; C.J. Wharton

    2001-08-01

    Idaho National Laboratory is experimenting with electrical neutron generators, as potential replacements for californium-252 radioisotopic neutron sources in its PINS prompt gamma-ray neutron activation analysis (PGNAA) system for the identification of military chemical warfare agents and explosives. In addition to neutron output, we have recently measured the x-ray output of the Thermo Scientific P385 deuterium-deuterium neutron generator. X-rays are a normal byproduct from a neutron generator and depending on their intensity and energy they can interfere with gamma rays from the object under test, increase gamma-spectrometer dead time, and reduce PGNAA system throughput. The P385 x-ray energy spectrum was measured with a high-purity germanium (HPGe) detector, and a broad peak is evident at about 70 keV. To identify the source of the x-rays within the neutron generator assembly, it was scanned by collimated scintillation detectors along its long axis. At the strongest x-ray emission points, the generator also was rotated 60° between measurements. The scans show the primary source of x-ray emission from the P385 neutron generator is an area 60 mm from the neutron production target, in the vicinity of the ion source. Rotation of the neutron generator did not significantly alter the x-ray count rate, and the x-ray emission appears to be axially symmetric within the neutron generator.

  19. An Account of Oak Ridge National Laboratory's Thirteen Research Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Rosenthal, Murray Wilford [ORNL

    2009-08-01

    The Oak Ridge National Laboratory has built and operated 13 nuclear reactors in its 66-year history. The first was the graphite reactor, the world's first operational nuclear reactor, which served as a plutonium production pilot plant during World War II. It was followed by two aqueous-homogeneous reactors and two red-hot molten-salt reactors that were parts of power-reactor development programs and by eight others designed for research and radioisotope production. One of the eight was an all-metal fast burst reactor used for health physics studies. All of the others were light-water cooled and moderated, including the famous swimming-pool reactor that was copied dozens of times around the world. Two of the reactors were hoisted 200 feet into the air to study the shielding needs of proposed nuclear-powered aircraft. The final reactor, and the only one still operating today, is the High Flux Isotope Reactor (HFIR) that was built particularly for the production of californium and other heavy elements. With the world's highest flux and recent upgrades that include the addition of a cold neutron source, the 44-year-old HFIR continues to be a valuable tool for research and isotope production, attracting some 500 scientific visitors and guests to Oak Ridge each year. This report describes all of the reactors and their histories.

  20. Test and evaluation results of the /sup 252/Cf shuffler at the Savannah River Plant

    Energy Technology Data Exchange (ETDEWEB)

    Crane, T.W.

    1981-03-01

    The /sup 252/Cf Shuffler, a nondestructive assay instrument employing californium neutron source irradiation and delayed-neutron counting, was developed for measuring /sup 235/U content of scrap and waste items generated at the Savannah River Plant (SRP) reactor fuel fabrication facility. The scrap and waste items include high-purity uranium-aluminum alloy ingots as well as pieces of castings, saw and lathe chips from machining operations, low-purity items such as oxides of uranium or uranium intermixed with flux materials found in recovery operations, and materials not recoverable at SRP such as floor sweepings or residues from the uranium scrap recovery operation. The uranium contains about 60% /sup 235/U with the remaining isotopes being /sup 236/U, /sup 238/U, and /sup 234/U in descending order. The test and evaluation at SRP concluded that the accuracy, safety, reliability, and ease of use made the /sup 252/Cf Shuffler a suitable instrument for routine use in an industrial, production-oriented plant.

  1. Compensated bismuth-loaded plastic scintillators for neutron detection using low-energy pseudo-spectroscopy

    Science.gov (United States)

    Dumazert, Jonathan; Coulon, Romain; Bertrand, Guillaume H. V.; Normand, Stéphane; Méchin, Laurence; Hamel, Matthieu

    2016-05-01

    Gadolinium-covered modified plastic scintillators show a high potential for the deployment of cost-effective neutron detectors. Taking advantage of the low-energy photon and electron signature of thermal neutron captures in gadolinium-155 and gadolinium-157 however requires a background correction. In order to display a trustable rate, dual compensation schemes appear as an alternative to Pulse Shape Discrimination. This paper presents the application of such a compensation scheme to a two-bismuth loaded plastic scintillator system. A detection scintillator interacts with incident photon and fast neutron radiations and is covered with a gadolinium converter to become thermal neutron-sensitive as well. In the meantime, an identical compensation scintillator, covered with terbium, solely interacts with the photon and fast neutron part of incident radiations. After the acquisition and the treatment of the counting signals from both sensors, a hypothesis test determines whether the resulting count rate after subtraction falls into statistical fluctuations or provides a robust image of neutron activity. A laboratory prototype is tested under both photon and neutron radiations, allowing us to investigate the performance of the overall compensation system. The study reveals satisfactory results in terms of robustness to a cesium-137 background and in terms of sensitivity in presence of a californium-252 source.

  2. Measurement of neutron dose and spectra at light-water reactors

    Energy Technology Data Exchange (ETDEWEB)

    Soldat, K.L.; Endres, G.W.R.; Cummings, F.M.

    1982-08-01

    In choosing one dosimeter over another, both sensitivity and precision must be addressed. It has been determined that dosimeters employing NTA film lack adequate sensitivity for use inside containment of nuclear plants. From this study, it is apparent that CR-39 and polycarbonate track etch films used without radiators are also inadequate. The rest of the dosimeters tested displayed adequate sensitivity. The two general types of dosimeters which comprise that group are: (1) TLDs and (2) the polycarbonate track etch which was used in conjunction with (n, ..cap alpha..) radiators. The precision of the TLD dosimeter depends on the calibration technique and response correction technique. TLD dosimeters calibrated to D/sub 2/O-moderated californium-252 or corrected based on 9- to 3-in. sphere response rates seemed to function best inside reactor containment. Polycarbonate track etch film with (n, ..cap alpha..) radiators was found to be sensitive enough for use inside reactor containment; however, the standard deviation for the results was roughly twice the value of the most precise TLD albedo dosimeters. Also, several of the polycarbonate dosimeters saturated, rendering any evaluation impossible.

  3. Report on the workshop "Decay spectroscopy at CARIBU: advanced fuel cycle applications, nuclear structure and astrophysics". 14-16 April 2011, Argonne National Laboratory, USA.

    Energy Technology Data Exchange (ETDEWEB)

    Kondev, F.; Carpenter, M.P.; Chowdhury, P.; Clark, J.A.; Lister, C.J.; Nichols, A.L.; Swewryniak, D. (Nuclear Engineering Division); (Univ. of Massachusetts); (Univ. of Surrey)

    2011-10-06

    A workshop on 'Decay Spectroscopy at CARIBU: Advanced Fuel Cycle Applications, Nuclear Structure and Astrophysics' will be held at Argonne National Laboratory on April 14-16, 2011. The aim of the workshop is to discuss opportunities for decay studies at the Californium Rare Isotope Breeder Upgrade (CARIBU) of the ATLAS facility with emphasis on advanced fuel cycle (AFC) applications, nuclear structure and astrophysics research. The workshop will consist of review and contributed talks. Presentations by members of the local groups, outlining the status of relevant in-house projects and availabile equipment, will also be organized. time will also be set aside to discuss and develop working collaborations for future decay studies at CARIBU. Topics of interest include: (1) Decay data of relevance to AFC applications with emphasis on reactor decay heat; (2) Discrete high-resolution gamma-ray spectroscopy following radioactive decya and related topics; (3) Calorimetric studies of neutron-rich fission framgents using Total ABsorption Gamma-Ray Spectrometry (TAGS) technique; (4) Beta-delayed neutron emissions and related topics; and (5) Decay data needs for nuclear astrophysics.

  4. Neutron activation determination of gold in technogenic raw materials with different mineral composition

    Directory of Open Access Journals (Sweden)

    Yudakov Aleksandr A.

    2015-01-01

    Full Text Available The methods used to determine the gold content in the technogenic objects of gold mining were analyzed regarding their non-homogeneity and complexity of chemical and mineral compositions. A possible application of the neutron activation analysis with the use of the californium source of neutrons for determining the content of fine-grained and extra-fine-grained gold in the technogenic objects, including the bottom-ash waste of energy providers, is considered. It was demonstrated that the chemical composition of the sample affects the neuron flux distribution in the sample, which can essentially distort the results of the neutron activation analysis. In order to eliminate possible systematic errors investigations of the effect of the sample mineral composition on the results of the gold determination using the neutron activation analysis were carried out. Namely, a large mass of rock (3-5 kg was loaded into an activation zone using four matrix types such as silicate, carbon-containing, iron-containing, and titanium magnetite. It was shown that there wereno significant difference between the dispersal of the fluxes of thermal and resonance neutrons emitted from 252Cf during activation of the gold-containing technogenic samples with different mineral compositions.

  5. Data of evolutionary structure change: 1OZHA-1UPCB [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1OZHA-1UPCB 1OZH 1UPC A B VRQWAHGADLVVSQLEAQGVRQVFGIPGAKIDKVFDSLL...>B 1UPCB LLGSSEGIDTPNPP HH... ASP CA 254 1UPC B 1UPCB...MET CA 330 1UPC B 1UPCB.../pdbID> B 1UPCB WQKGIEKKTVR

  6. Russia and the Iranian Nuclear Program: Replay or Breakthrough? (Strategic Perspectives, no. 9)

    Science.gov (United States)

    2012-03-01

    president, See Parker, Russia’s Revival, 5–8. 254 Yevgeniya Pismennaya, “Putinu predlozheny neudobnyye dlya nego reformy,” Vedo - mosti.ru, December 30...Online, October 14, 2011, CEP20111014964155. 260 Natalya Kostenko, “Rokirovka vo vlasti polozhila konets modernizatsii,” Vedo - mosti.ru, December 30, 2011

  7. Relationship between ocular surface temperature and peripheral vasoconstriction in healthy subjects: A thermographic study

    DEFF Research Database (Denmark)

    Matteoli, Sara; Vannetti, Federica; Finocchio, Lucia

    2014-01-01

    vasoconstriction might be detected by measuring the ocular surface temperature. The ocular surface temperature was evaluated in a group of 38 healthy young subjects (28 males and 10 females; mean age: 25.4 6 4.1 years) by infrared thermography. For each subject, the experimental procedure consisted of two...

  8. AcEST: DK956590 [AcEST

    Lifescience Database Archive (English)

    Full Text Available p|Q01291|RS0_NEUCR 40S ribosomal protein S0 OS=Neurospora crass... 254 2e-67 sp|P38980|RSSA_TRIGR 40S ribosomal protein SA OS=Tripneu...stes gra... 250 3e-66 sp|Q9Y7L8|RS0A_SCHPO 40S ribosomal

  9. Skills Needed by Secondary School Graduates for Breeding and Rearing of Giant African Land Snail (GALS) in Ebonyi State

    Science.gov (United States)

    Ogba, Ernest Ituma; Ndem, Joseph Uka

    2016-01-01

    The purpose of the study is to identify the skills required by secondary school Graduates for breeding and rearing Giant African Land Snail (GALS) in Ebonyi State. Three research questions guided the study. The design was descriptive survey. The total population was 254 agricultural science Teachers in junior and senior secondary schools in Ebonyi…

  10. HEALTH COMPLAINTS, SOCIAL COMPARISONS, AND ABSENTEEISM

    NARCIS (Netherlands)

    GEURTS, SA; BUUNK, BP; SCHAUFELI, WB

    1994-01-01

    In this study the relationship between health problems and objectively recorded absence frequency is investigated from a social psychological perspective in a prospective design. By employing LISREL, a model is developed (tested and revised) among blue-collar workers in Plant North (N = 254) of a me

  11. Resonance raman and absorption spectra of isomeric retinals in their lowest excited triplet states

    DEFF Research Database (Denmark)

    Wilbrandt, Robert Walter; Jensen, N.-H.; Houee-Levin, C.

    1985-01-01

    implications about the size of the energy barriers separating the various triplet species are discussed. The resonance Raman spectra obtained by using either anthracene (ET = 177.7 kJ mol-1) or naphthalene (ET = 254.8 kJ mol-1) as sensitizers were virtually identical for the corresponding triplet states from...

  12. Preparation of actinide targets and sources using nonaqueous electrodeposition

    Energy Technology Data Exchange (ETDEWEB)

    Fowler, M.M.; Gursky, J.C.; Wilhelmy, J.B. (Los Alamos National Lab., NM (USA))

    1991-05-15

    Application of the method of 'molecular plating' to prepare actinide targets suitable for accelerator bombardment is presented. Two example applications involving {sup 229}Th and {sup 254}Es are discussed along with the merits and liabilities of the method. (orig.).

  13. Gclust Server: 32 [Gclust Server

    Lifescience Database Archive (English)

    Full Text Available 3989 Link to cluster sequences Cluster Sequences Link to related sequences Related Sequences(507) Sequence length 254 Representative...n Number of Sequences 411 Homologs 411 Clustering threshold 1.00e-45 Plants and algae (7species) (%) 28.57 Other Bikonts (Chromalve

  14. 大米中矿物油的薄层色谱定性分析%Qualitative Analysis of Mineral Oil in Rice by Thin Layer Chro matography

    Institute of Scientific and Technical Information of China (English)

    汪海峰; 鞠兴荣

    2001-01-01

    A method was developed to determinate the mineral oil in rice bythin layer chromatography.Rice was rapidly extracted with petroleum ether,the n concentrated and transferred onto a GF254 fluorescent thin layer plate.A fter developed with petroleum ether-ether solution,the purple spot(Rf=0.71)which corresponded with reference standard was identified under 254nm ultraviolet lig ht.Result shows that the method is rapid,specific,and leads to a higher sensitiv ity (MDL:10mg/Kg),which meets the requirement of rapid analysis.%采用薄层色谱法对大米中矿物油的定性分析方法进行了研究。样品以石油醚快速提取并浓缩,点样于GF254硅胶板,经石油醚—乙醚混合溶剂展开后,于波长254nm紫外灯下观察紫色斑点的比移值(Rf),并结合对照品进行定性分析。结果表明,该方法简便快捷、专属性强、灵敏度高(最低检出含量10mg/Kg),可用于大米中矿物油的快速检测。

  15. 8 CFR 1280.6 - Bond to obtain clearance; form.

    Science.gov (United States)

    2010-01-01

    ... 8 Aliens and Nationality 1 2010-01-01 2010-01-01 false Bond to obtain clearance; form. 1280.6... IMMIGRATION REGULATIONS IMPOSITION AND COLLECTION OF FINES § 1280.6 Bond to obtain clearance; form. A bond to obtain clearance of a vessel or aircraft under section 231, 237, 239, 243, 251, 253, 254, 255, 256,...

  16. 76 FR 27103 - Privacy Act of 1974; System of Records

    Science.gov (United States)

    2011-05-10

    ... responsibilities, as well as to populate public-facing government Web sites where such data release has been... records may be disclosed in order to populate public-facing government Web sites when disclosure of... 20006, (202) 254-7900. Ivan J. Flores, Paralegal Specialist, Recovery Accountability and...

  17. AcEST: BP917441 [AcEST

    Lifescience Database Archive (English)

    Full Text Available 9M5X2|Q9M5X2_EUPES Heat-shock protein 80 (Fragment) OS=Eupho... 117 2e-25 tr|Q8GT83|Q8GT83_GOSBA Fiber prote... 181 NNDKSVKDL 207 NDKSVKDL Sbjct: 246 KNDKSVKDL 254 >tr|Q8GT83|Q8GT83_GOSBA Fiber

  18. 78 FR 67177 - Center for Scientific Review; Notice of Closed Meetings

    Science.gov (United States)

    2013-11-08

    ...@csr.nih.gov . This notice is being published less than 15 days prior to the meeting due to the timing... Emphasis Panel; RFA Panel: International Research Ethics Education and Curriculum Development. Date... Rockledge Drive, Room 3144, MSC 7770, Bethesda, MD 20892, (301) 254-9975, helmersk@csr.nih.gov . Name...

  19. 75 FR 31361 - Proposed Flood Elevation Determinations

    Science.gov (United States)

    2010-06-03

    ... Incorporated Areas Church House Branch Approximately 0.5 mile None +211 City of Wiggins. downstream of East 5th... feet None +171 City of Wiggins, downstream of Unincorporated Areas Clubhouse Drive. of Stone County... None +174 City of Wiggins. Flint Creek. Approximately 350 feet None +254 upstream of Annis Lane....

  20. 77 FR 13352 - Notice of Determinations Regarding Eligibility To Apply for Worker Adjustment Assistance

    Science.gov (United States)

    2012-03-06

    ... 202(b)(1); (B) an affirmative determination of market disruption or threat thereof under section 421(b...., Chicago, IL February 13, 2010. Corporate Resources, Aerotek, Dysis and Tek. 81,254 BT North America... Workforce Carolina. 81,263 Chartis Global Services, Houston, TX February 13, 2010. Inc., Regional...

  1. 76 FR 20377 - Applications and Amendments to Facility Operating Licenses Involving Proposed No Significant...

    Science.gov (United States)

    2011-04-12

    ... Counties, Pennsylvania Exelon Generation Company, LLC, Docket Nos. 50-254 and 50-265, Quad Cities Nuclear... required by 10 CFR 50.91(a), the licensee has provided its analysis of the issue of no significant hazards... not alter previously evaluated Final Safety Analysis Report (FSAR) design basis accident...

  2. 76 FR 50759 - Applications and Amendments to Facility Operating Licenses Involving Proposed No Significant...

    Science.gov (United States)

    2011-08-16

    ... Company, LLC (EGC), Docket No. 50-254, Quad Cities Nuclear Power Station (QCNPS), Unit 1, Rock Island... required by 10 CFR 50.91(a), the licensee has provided its analysis of the issue of no significant hazards... hazards consideration is justified. The NRC staff has reviewed the licensee's analysis and, based on...

  3. 78 FR 77729 - Biweekly Notice: Applications and Amendments to Facility Operating Licenses and Combined Licenses...

    Science.gov (United States)

    2013-12-24

    ..., Illinois Exelon Generation Company, LLC, Docket Nos. 50-254 and 50-265, Quad Cities Nuclear Power Station... by 10 CFR 50.91(a), the licensee has provided its analysis of the issue of no significant hazards... hazards consideration'' is justified. The NRC staff has reviewed the licensee's analysis and, based...

  4. 75 FR 6408 - Biweekly Notice; Applications and Amendments to Facility Operating Licenses Involving No...

    Science.gov (United States)

    2010-02-09

    ..., Illinois Docket Nos. 50-254 and 50-265, Quad Cities Nuclear Power Station, Units 1 and 2, Rock Island... required by 10 CFR 50.91(a), the licensee has provided its analysis of the issue of no significant hazards... the licensee's analysis and, based on this review, it appears that the three standards of 10 CFR...

  5. 10 CFR Appendix I to Subpart B of... - Uniform Test Method for Measuring the Energy Consumption of Conventional Ranges, Conventional...

    Science.gov (United States)

    2010-01-01

    ... supported by horizontal surface cabinetry. 1.3Forced convection means a mode of conventional oven operation..., with their associated wires, are used to measure temperature by means of electromotive force. 1... copper disc that is 1-inch (25.4 mm) in diameter and 1/8-inch (3.2 mm) thick. The two thermocouple...

  6. Gclust Server: 119844 [Gclust Server

    Lifescience Database Archive (English)

    Full Text Available 119844 HSA_113420075 Cluster Sequences Related Sequences(22) 254 XP_001127902.1 PRE...1.00e-90 0.0 0.0 0.0 0.0 0.0 12.5 Show 119844 Cluster ID 119844 Sequence ID HSA_113420075 Link to cluster se

  7. 2012 Military Family Life Project (MFLP): Tabulations of Responses

    Science.gov (United States)

    2013-10-31

    110 34. Child Behavior Checklist: Constructed from Q34. This scale measures problematic behaviors exhibited by a child...204 50. Social Support Index: Constructed from Q50. This scale measures the extent that individuals perceive their network...problems ................................................................................. 254 j. Loneliness

  8. Gas and surface diffusion in modified γ-alumina systems

    NARCIS (Netherlands)

    Uhlhorn, R.J.R.; Keizer, K.; Burggraaf, A.J.

    1989-01-01

    The transport of pure gases through a microporous membrane is described. The alumina-based membrane (pores 2.5-4 nm) is suitable for Knudsen diffusion separation. To improve the separation factor, interaction with and mobility on the pore wall of one of the gases of a mixture is necessary. To introd

  9. Developing Molecular Methods to Identify and Quantify Ballast Water Organisms: A Test Case with Cnidarians

    Science.gov (United States)

    2004-04-15

    AF358070 Cystonectae Physaliidae Physalia physalis AF358065 Physalia sp. This project Physalia utriculus AF358066 Physonectae Agalmatidae...U19378 Siphonophora Cystonectae Physaliidae Physalia physalis This project Trachylina Trachymedusae Geryoniidae Liriope tetraphylla...Obelia dichotoma 226 188, 20, 18 102, 93, 31 DNC DNC DNC Physalia physalis 252 214, 20, 18 123, 78, 51 DNC 158, 94 DNC Liriope tetraphylla 254 216, 20

  10. Dicty_cDB: SHC181 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available e sequence. 44 2.1 1 AC152894 |AC152894.3 Saimiri boliviensis boliviensis clone CH254-450C11, complete sequence. 42 5.9 2 AL713919... |AL713919.11 Mouse DNA sequence from clone RP23-41F14 on c

  11. Data of evolutionary structure change: 1AFCF-1Z4SB [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available /entryIDChain> LYCSN-GHFLR >EEE - EEE> F 1AFCF LYCSNGGYFLR ...>EEE EEEE> ATOM 4951 CA LEU F 14 61.269 21.921 ...ID> B 1Z4SB YIKST-TGQYL ...>EEE - EE> ATOM 1583 CA TYR B 55 50.017 14.254 20.934 1.

  12. LOUISIANA STUDY OF MANPOWER AND TRAINING NEEDS IN FINANCE, INSURANCE, AND REAL ESTATE OCCUPATIONS.

    Science.gov (United States)

    WOFFORD, T.B.

    TO DETERMINE THE EMPLOYMENT OPPORTUNITIES AND TRAINING NEEDS IN THE FINANCE, INSURANCE, AND REAL ESTATE INDUSTRY OF LOUISIANA, DATA WERE OBTAINED FROM PERSONAL INTERVIEWS OF 102 FIRMS REPRESENTING 25.4 PERCENT OF THE INDUSTRY AND EMPLOYING 7,849 WORKERS. FINDINGS INCLUDED--(1) IN 1965, 30,843 PERSONS WERE EMPLOYED IN 56 DIFFERENT JOBS OR…

  13. Dicty_cDB: Contig-U16469-1 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 9 1 ( AC140550 ) Medicago truncatula clone mth2-54a24, complete se... 44 8.9 1 ( DL083628 ) Listeria innocua, genome and applications.... 44 8.9 1 ( DL081582 ) Listeria innocua, genome and applications. 44 8.9 1 ( AX415

  14. Determining Baseline Stress-Related Hormone Values in Large Cetaceans

    Science.gov (United States)

    2015-09-30

    Large Cetaceans Stephen J. Trumble and Sascha Usenko Baylor University One Bear Place #97388 Waco, Texas 76706 phone: (254) 710-2128 fax... cetacean stress research. The results of this study will contribute to improving mitigation strategies through improved assessments of the potential...impacts of anthropogenic activity. OBJECTIVES Historically, whale earplugs have been used to age large cetaceans . This rudimentary technique which

  15. The Coast Artillery Journal. Volume 79, Number 6, November-December 1936

    Science.gov (United States)

    1936-12-01

    were not hitting it off well; and Bulow, Hausen and Duke Al- brecht did not always seem to see eye to eye. That was natural; it was part of the...Election, Results of the ., 67 English as She is Wrote, Military, Bull 134 Exterminating the Biggest Bug, Conzelman 254 F Facts and Fables , Kibler 125

  16. Domain Modeling: NP_776173.3 [SAHG[Archive

    Lifescience Database Archive (English)

    Full Text Available BETP FROM CORYNEBACTERIUM GLUTAMICUM WITH BOUND SUBSTRATE p2wita_ chr12/NP_776173.3/NP_776173.3_holo_80-636.pdb swppa 252L,254G,255L,256M,258G,259L,270T,335V,402L,403L,440L BET 0 ...

  17. LIVER AND BILIARY SYSTEM

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    2004513 The influence of HBV on interferon gamma receptor 1 expression and its signal paghway.CHEN Gongying (陈公英), et al. Instit Infect Dis, 1st Affili Hosp, Med Coll, Zhejiang Univ, Hangzhou 310003. Chin J Infect Dis 2004; (4):250-254.Objective: To investigate whether hepatitis B virus will influence interferon gamma receptor expression

  18. Degradation Mechanism of Cyanobacterial Toxin Cylindrospermopsin by Hydroxyl Radicals in Homogeneous UV/H2O2 Process

    Science.gov (United States)

    The degradation of cylindrospermopsin (CYN), a widely distributed and highly toxic cyanobacterial toxin (cyanotoxin), remains poorly elucidated. In this study, the mechanism of CYN destruction by UV-254 nm/H2O2 advanced oxidation process (AOP) was investigated by mass spectrometr...

  19. Biology and Potential Biogeochemical Impacts of Novel Predatory Flavobacteria

    Science.gov (United States)

    2010-06-01

    involved in phagocytosis by Acanthamoeba . Nature 254: 434-435. 148. Wootton EC, Zubkov MV, Jones DH, Jones RH, Martel CM, et al. (2007) Biochemical prey... Acanthamoeba castellanii and Hartmannella vermiformis. Appl Environ Microbiol 73: 2631-2634. 155. Daft M, Burnham J, Yamamoto Y (1985) Lysis of

  20. Norma tulemuste taga on eksport Venemaale / Virge Lahe

    Index Scriptorium Estoniae

    Lahe, Virge

    2008-01-01

    Autode turvavarustuse tootja AS-i Norma teise kvartali puhaskasum oli 25,4 miljonit krooni, mis on kaks korda enam kui 2007. aasta teises kvartalis, edaspidi võib kasumit survestada terasehinna tõus. Diagramm: Norma kasum on kasvanud

  1. An Investigation of Social Skills in Children with Different Perfectionism Levels

    Science.gov (United States)

    Arslan, Emel

    2011-01-01

    The purpose of this study is to analyze social skills in children with different perfectionism. The participants were 514 (254 females and 260 males) elementary school students. Data were collected from "multidimensional perfectionism scale" and "Matson evaluation of social skills with youngsters". In order to analyze data, t…

  2. Static Extended Trailing Edge for Lift Enhancement: Experimental and Computational Studies

    Science.gov (United States)

    2007-06-01

    extension could be an aluminum plate, polymer membrane, composite sheet or smart material plate. In general, a thin extended trailing edge is...dimensionality of flow, they modify the tip vortices acting like large winglets . In tests, an aluminum sheet (0.216 mm thick) and a Mylar sheet (0.254 mm

  3. Data of evolutionary structure change: 1OZHA-1UPCD [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1OZHA-1UPCD 1OZH 1UPC A D VRQWAHGADLVVSQLEAQGVRQVFGIPGAKIDKVFDSLL...>LYS CA 249 VAL CA 284 1UPC D... 1UPCD LLGSSEGIDTPNPP HHH ... ILE CA 324 ASP CA 254 1UPC D 1UPCD GVVADGWQKAAD

  4. The Effects of Self-Assessment among Young Learners of English

    Science.gov (United States)

    Butler, Yuko Goto; Lee, Jiyoon

    2010-01-01

    This study examined the effectiveness of self-assessment among 254 young learners of English as a foreign language. This study looked at 6th grade students in South Korea, who were asked to perform self-assessments on a regular basis for a semester during their English classes. The students improved their ability to self-assess their performance…

  5. Corporal Punishment in Tanzania's Schools

    Science.gov (United States)

    Feinstein, Sheryl; Mwahombela, Lucas

    2010-01-01

    The purpose of this survey was to acquire descriptive information regarding corporal punishment in Tanzania's O-level secondary schools. 448 individuals participated in the study: 254 teachers and 194 students, all from government or private secondary schools in the Iringa Region of Tanzania. In addition, 14 students and 14 teachers were…

  6. Soot Formation and Destruction in High-Pressure Flames with Real Fuels

    Science.gov (United States)

    2013-08-18

    0.7 mm beam was first directed through an f = -25 mm plano -concave lens, and then collimated by passing through an f = 150 mm plano -convex lens to a...front of the photodiode detector surface to limit the effect of spatial variation in detection. The main beam was focused by a 25.4 mm plano - convex

  7. Parent-Endorsed Sex Differences in Toddlers with and without ASD: Utilizing the M-CHAT

    Science.gov (United States)

    Øien, Roald A.; Hart, Logan; Schjølberg, Synnve; Wall, Carla A.; Kim, Elizabeth S.; Nordahl-Hansen, Anders; Eisemann, Martin R.; Chawarska, Katarzyna; Volkmar, Fred R.; Shic, Frederick

    2017-01-01

    Sex differences in typical development can provide context for understanding ASD. Baron-Cohen ("Trends Cogn Sci" 6(6):248-254, 2002) suggested ASD could be considered an extreme expression of normal male, compared to female, phenotypic profiles. In this paper, sex-specific M-CHAT scores from N = 53,728 18-month-old toddlers, including n…

  8. Military Personnel: Enhanced Collaboration and Process Improvements Needed for Determining Military Treatment Facility Medical Personnel Requirements

    Science.gov (United States)

    2010-07-01

    dentists, medical service corps, and veterinarians , to name a few, at the work center level across Army fixed military treatment facilities. The model uses...1072 - 896 903 Hematology /Oncology 41 40 43 - 12 17 - 18 14 Infectious Disease 63 59 62 - 29 34 - 16 17 Internal Medicine 315 e 254 e 277 e

  9. AcEST: DK963372 [AcEST

    Lifescience Database Archive (English)

    Full Text Available nt phospho... 31 4.9 sp|Q4KJX9|AGUA_PSEF5 Agmatine deiminase OS=Pseudomonas fluoresce... 31 4.9 sp|O29443|TR...75%) Frame = +2 Query: 161 SGVVNEDDTPTETANQDDAV 220 S +VNED+TP T N DDAV Sbjct: 235 SVIVNEDETPVATINDDDAV 254 >sp|Q4KJX9|AGUA

  10. Genetic and Environmental Etiologies of Reading Difficulties: DeFries-Fulker Analysis of Reading Performance Data from Twin Pairs and Their Non-Twin Siblings

    Science.gov (United States)

    Astrom, Raven L.; Wadsworth, Sally J.; Olson, Richard K.; Willcutt, Erik G.; DeFries, John C.

    2012-01-01

    Reading performance data from 254 pairs of identical (MZ) and 420 pairs of fraternal (DZ) twins, 8.0 to 20.0 years of age, were subjected to multiple regression analyses. An extension of the DeFries-Fulker (DF) analysis (DeFries & Fulker, 1985, 1988) that facilitated inclusion of data from 303 of their nontwin siblings was employed. In addition to…

  11. International Students' Motivation and Learning Approach: A Comparison with Local Students

    Science.gov (United States)

    Chue, Kah Loong; Nie, Youyan

    2016-01-01

    Psychological factors contribute to motivation and learning for international students as much as teaching strategies. 254 international students and 144 local students enrolled in a private education institute were surveyed regarding their perception of psychological needs support, their motivation and learning approach. The results from this…

  12. 76 FR 14818 - Chemical Testing

    Science.gov (United States)

    2011-03-18

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Coast Guard 46 CFR Part 16 Chemical Testing CFR Correction In Title 46 of the Code of Federal Regulations, Parts 1 to 40, revised as of October 1, 2010, on page 254, in Sec. 16.105, in the definition...

  13. Social Constructivism and the "Believing Game": A Mathematics Teacher's Practice and Its Implications

    Science.gov (United States)

    Harkness, Shelly Sheats

    2009-01-01

    The study reported here is the third in a series of research articles (Harkness, S. S., D'Ambrosio, B., & Morrone, A. S., in "Educational Studies in Mathematics" 65:235-254, 2007; Morrone, A. S., Harkness, S. S., D'Ambrosio, B., & Caulfield, R. in "Educational Studies in Mathematics" 56:19-38, 2004) about the teaching practices of the same…

  14. Evaluación del coeficiente de diálisis de soluciones de globulina de sangre de equino con sulfato de amonio

    OpenAIRE

    Chacón Valle, Gerardo

    2011-01-01

    Se estudió el coeficiente de diálisis de la desalinización de soluciones de globulina, de sangre de equino, del sulfato de amonio. Se cumple para la diálisis en bolsas de celulosa regenerada debaja densidad, con diámetros entre 2.54 y 5.08 cm.

  15. Other psychosis

    Institute of Scientific and Technical Information of China (English)

    1992-01-01

    920750 A comparison study of rapid cyclingand non-rapid cycling types in bipolaraffective disorder. SHEN Qijie(沈其杰),et al. Shenzhen Res Instit, Mental Health,Guangdong, 518003. Chin J Neurol & Psychiat1992; 25(4): 199-201. Here is a prospective and comparative study onthe two types of bipolar affective disorder-rapidcycling (RC) and nonrapid cycling(NRC).

  16. Real-time UV imaging of nicotin release from transdermal patch

    DEFF Research Database (Denmark)

    Østergaard, Jesper; Meng-Lund, Emil; Larsen, Susan Weng

    2010-01-01

    H 7.40, was studied by UV imaging (Actipix SDI300 dissolution imaging system) at 254 nm. The release rates were compared to those obtained using the paddle-over-disk method. RESULTS: Calibration curves were successfully established which allowed temporally and spatially resolved quantification...

  17. Spontaneous Subconjunctival Abscess Because of Haemophilus influenzae

    Science.gov (United States)

    2010-07-01

    REFERENCES 1. Hedlin P, Blondeau JM. Comparative minimal inhibitory and mutant prevention drug concentrations of four fluoroquinolones against ocular... fluoroquinolones . Cornea. 2007;26:238 240. 18. Maskin SL. Infectious scleritis after a diabetic foot ulcer. Am J Ophthalmol. 1993;115:254 255. 19. Hwang

  18. Ozsvath, Zsuzsanna: "When the Danube Ran Red"; Mandel, Eva Marika: "Le Livre de Mana"; Roth, Marika: "All the Pretty Shoes; A Memoir of Survival and the Feminine Spirit".

    Directory of Open Access Journals (Sweden)

    Evi Blaikie

    2011-01-01

    Full Text Available Ozsvath, Zsuzsanna. When the Danube Ran Red. Syracuse University Press, 2010,171 pp., Illus.Mandel, Eva Marika. Le Livre de Mana. Paris, Glyphe 2009, 231 pp., Illus.Roth, Marika. All the Pretty Shoes; A Memoir of Survival and the Feminine SpiritWyatt McKenzy 2010, 254 pp., Illus.Reviewed by Evi Blaikie, Freelance Writer.

  19. Photocatalysis; IV. Preparation and characterization of a stable copper(I) triflate-trans-cycloheptene complex

    NARCIS (Netherlands)

    Evers, J.T.M.; Mackor, A.

    1979-01-01

    When copper(I) triflate·cis‐cycloheptene is irradiated at 254 nm in n‐hexane solution, cis → trans‐isomerization occurs and the stable complex copper (I) triflate·trans‐cycloheptene precipitates. This complex has been isolated, purified and characterized by elemental analysis and by its 1H and 13C N

  20. 75 FR 17555 - Department of Agriculture Civil Monetary Penalties Adjustment

    Science.gov (United States)

    2010-04-07

    ... regulatory action in accordance with the provisions of Executive Order 12866, Regulatory Planning and Review.... Warehouse Act, codified at 7 U.S.C. 254, has a maximum of $27,500 per violation if an agricultural product... FOR THE UNITED STATES WAREHOUSE ACT 0 8. The authority for part 735 continues to read as...

  1. Testing a Model Linking Environmental Hope and Self-Control with Students' Positive Emotions and Environmental Behavior

    Science.gov (United States)

    Kerret, Dorit; Orkibi, Hod; Ronen, Tammie

    2016-01-01

    This study examined a moderated mediation model with 254 Israeli junior high school students, hypothesizing that students' environmental hope would simultaneously mediate the relationship between their engagement in school-based environmental activities (green engagement) and their environmental behavior as well as their positivity ratio, but that…

  2. Adsorption and Accommodation of Xe on Pt(111)

    Science.gov (United States)

    1992-05-25

    atoms on metal surfaces.15. 16 15 May 1992 -7- Acknowledgments The authors would like to thank Dan Auerbach, Mark Cardillo, Milton Cole, Roald ...Phys. Rev. Lett. 66, 1998 (1991). 15. S. C. Wang and G. Ehrlich, J. Chem. Phys. 94, 4071 (1991). 16. D. E. Sanders and A. E. DePristo, Surf. Sci. 254

  3. Characterisation of extracts of Hypericum perforatum L. using an on-line HPLC system with UV/visible and fluorescence detection prior to and after photochemical conversion of the effluent

    DEFF Research Database (Denmark)

    Jensen, A. G.; Cornett, Claus; Gudiksen, L.

    2000-01-01

    was illuminated with UV light at 254 nm for 1 min. The apparent content of hypericins was dependent on the mode of detection, and it is therefore of importance to state carefully the mode of detection in any analytical method in order to use the method for reproducible standardisation procedures. Copyright (C...

  4. Electrophoresis microchip with integrated waveguides for simultaneous native UV fluorescence and absorbance detection

    DEFF Research Database (Denmark)

    Ohlsson, Pelle Daniel; Sala, Olga Ordeig; Mogensen, Klaus Bo

    2009-01-01

    Simultaneous label-free detection of UV absorbance and native UV-excited fluorescence in an electrophoresis microchip is presented. UV transparent integrated waveguides launch light at a wavelength of 254 nm from a mercury lamp along the length of a 1-mm. long detection cell. Transmitted UV light...

  5. Regional cerebral blood flow in aphasia

    DEFF Research Database (Denmark)

    Soh, K; Larsen, B; Skinhøj, E

    1978-01-01

    Regional cerebral blood flow (rCBF) was studied in 13 aphasic patients with left hemisphere lesions, using the intracarotid xenon 133 injection method and a 254-detector gamma camera system. The rCBF was measured during rest and during various function tests, including a simple speech test...

  6. Focal ischaemia caused by instability of cerebrovascular tone during attacks of hemiplegic migraine. A regional cerebral blood flow study

    DEFF Research Database (Denmark)

    Friberg, L; Olsen, T S; Roland, P E

    1987-01-01

    During the course of hemiplegic migraine in 3 patients, changes in regional cerebral blood flow (rCBF) were recorded by the intracarotid 133Xe method and a 254 multidetector camera covering one hemisphere. The rCBF measurements were performed in conjunction with cerebral angiography. During...

  7. An Examination of Drunkorexia, Greek Affiliation, and Alcohol Consumption

    Science.gov (United States)

    Ward, Rose Marie; Galante, Marina; Trivedi, Rudra; Kahrs, Juliana

    2015-01-01

    The purpose of this study is to examine the relation between Greek affiliation, the College Life Alcohol Salience Scale, alcohol consumption, disordered eating, and drunkorexia (i.e., using disordered eating practices as compensation for calories consumed through alcohol). A total of 349 college students (254 females, 89 males) participated in the…

  8. Emily Dickinson em três versões

    Directory of Open Access Journals (Sweden)

    Carlos Daghlian

    2008-01-01

    Full Text Available LIRA, José. Emily Dickinson: alguns poemas. (Tradução e ensaio introdutório: “Emily Dickinson: a críptica beleza”. Edição bilíngüe. São Paulo: Iluminuras, 2006. 319 p. ISBN 85-7321-254-3.

  9. Building information modeling (BIM) approach to the GMT Project

    Science.gov (United States)

    Teran, Jose; Sheehan, Michael; Neff, Daniel H.; Adriaanse, David; Grigel, Eric; Farahani, Arash

    2014-07-01

    The Giant Magellan Telescope (GMT), one of several next generation Extremely Large Telescopes (ELTs), is a 25.4 meter diameter altitude over azimuth design set to be built at the summit of Cerro Campánas at the Las Campánas Observatory in Chile. The paper describes the use of Building Information Modeling (BIM) for the GMT project.

  10. Employment Skills for 21st Century Workplace: The Gap between Faculty and Student Perceptions

    Science.gov (United States)

    Hodge, Kay A.; Lear, Janet L.

    2011-01-01

    This study compared the perceptions of college business faculty and students regarding the business competencies needed to get a job after graduation. The population for this research consisted upper-level students (n = 254), who were enrolled in business classes at a Midwest university and faculty members (n = 37) teaching in the business area at…

  11. Team Theory and Decentralized Resource Allocation: An Example.

    Science.gov (United States)

    1982-02-01

    continues through Walras [1954, pp. 84-86, 90-91, 105-106, 169-172, 243-254, and 184-1951, Pareto 11927, pp. 233-2341, Barone, pp. 245-290 in von Hayek...politique (Deuxi~me edition), Marcel Girard, Paris. Walras , L. [19541, Elements of Pure Economics, ed. and tr. by W. Jaffe, George Allen and Unwin

  12. Gclust Server: 201254 [Gclust Server

    Lifescience Database Archive (English)

    Full Text Available 201254 Sme_SMb21409 Cluster Sequences - 254 hypothetical protein 1 1.00e-99 0.0 0.0... 0.0 0.0 3.23 0.0 Show 201254 Cluster ID 201254 Sequence ID Sme_SMb21409 Link to cluster sequences Cluster S

  13. Gluconeogenesis is Not Regulated by Either Glucose or Insulin in Extremely Low Birth Weight Infants Receiving Total Parenteral Nutrition

    NARCIS (Netherlands)

    Chacko, Shaji K.; Ordonez, Jorge; Sauer, Pieter J. J.; Sunehag, Agneta L.

    2011-01-01

    Objective To determine potential factors regulating gluconeogenesis (GNG) in extremely low birth weight infants receiving total parenteral nutrition. Study design Seven infants (birth weight, 0.824 +/- 0.068 kg; gestational age, 25.4 +/- 0.5 weeks; postnatal age, 3.3 +/- 0.2 days) were studied for 1

  14. School Principals' Leadership Behaviours and Its Relation with Teachers' Sense of Self-Efficacy

    Science.gov (United States)

    Mehdinezhad, Vali; Mansouri, Masoumeh

    2016-01-01

    The aim of this study was to investigate the relationship between school principals' leadership behaviours and teachers' sense of self-efficacy. The research method was descriptive and correlational. A sample size of 254 teachers was simply selected randomly by proportional sampling. For data collection, the Teachers' Sense of Efficacy Scale of…

  15. Patterns of regional cerebral blood flow in acute stroke

    DEFF Research Database (Denmark)

    Olsen, T S; Skriver, E B

    1981-01-01

    In a consecutive group of 56 stroke patients the regional cerebral blood flow was measured within 84 hours after stroke. A 254 multidetector scintillation camera and the intracarotid Xenon-133 injection method was used to study rCBF. Typical rCBF-patterns are described and compared to the findings...

  16. The Social Cost of Maintaining a Military Labor Force

    Science.gov (United States)

    1975-08-01

    American Economic Review Proceedings...57 (May 1967), pp. 19-31. 3. Borcherding, Thomas E., "A Neglected Social Cost of a Volunteer Force," American Economic Review , 61...Draft," American Economic Review , 59 (June 1969), pp. 239-254. 7. -----, "The Cost of Ending the Draft: Reply," American Economic Review ,

  17. Employability and lifelong learning in the knowledge society (1/2)

    NARCIS (Netherlands)

    Koper, Rob; Verjans, Steven

    2008-01-01

    Koper, R., & Verjans, S. (Eds.) (2008). Employability and lifelong learning in the knowledge society [special issue]. Campus-Wide Information Systems, 25(4). (Selected papers from the e-portfolio 2007 conference, October, 15-19, 2007, Maastricht, The Netherlands.)

  18. Preparing the Human Weapon System: Promoting Warrior Resiliency

    Science.gov (United States)

    2010-02-17

    Hardiness “Whatever doesn’t kill me makes me stronger” ~ Nietzsche (1968, p. 254) While foundational skills building may contribute to...An initial dismantling investigation. Journal of Consulting and Clinical Psychology, 57, 408-413. Nietzsche , F. W., (1968). The will to power (W

  19. File list: ALL.Neu.20.AllAg.Hypothalamus [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Neu.20.AllAg.Hypothalamus mm9 All antigens Neural Hypothalamus SRX956253,SRX956...254 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Neu.20.AllAg.Hypothalamus.bed ...

  20. File list: ALL.Neu.50.AllAg.Hypothalamus [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Neu.50.AllAg.Hypothalamus mm9 All antigens Neural Hypothalamus SRX956253,SRX956...254 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Neu.50.AllAg.Hypothalamus.bed ...

  1. File list: ALL.Neu.10.AllAg.Hypothalamus [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Neu.10.AllAg.Hypothalamus mm9 All antigens Neural Hypothalamus SRX956253,SRX956...254 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/ALL.Neu.10.AllAg.Hypothalamus.bed ...

  2. File list: Unc.Neu.50.AllAg.Hypothalamus [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Unc.Neu.50.AllAg.Hypothalamus mm9 Unclassified Neural Hypothalamus SRX956253,SRX956...254 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Neu.50.AllAg.Hypothalamus.bed ...

  3. File list: Unc.Neu.10.AllAg.Hypothalamus [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Unc.Neu.10.AllAg.Hypothalamus mm9 Unclassified Neural Hypothalamus SRX956253,SRX956...254 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Neu.10.AllAg.Hypothalamus.bed ...

  4. File list: Unc.Neu.20.AllAg.Hypothalamus [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Unc.Neu.20.AllAg.Hypothalamus mm9 Unclassified Neural Hypothalamus SRX956253,SRX956...254 http://dbarchive.biosciencedbc.jp/kyushu-u/mm9/assembled/Unc.Neu.20.AllAg.Hypothalamus.bed ...

  5. EST Table: FS915193 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available cade) 10/09/28 92 %/254 aa ref|NP_001040215.1| stathmin [Bombyx mori] gb|ABD36259.1| stathmin [Bombyx mori] ... %/262 aa gi|91083957|ref|XP_975021.1| PREDICTED: similar to stathmin [Tribolium castaneum] FS915193 fufe ...

  6. Purification and biochemical characterization of the complete structure of a proteolytically modified beta-2-microglobulin with biological activity

    DEFF Research Database (Denmark)

    Nissen, Mogens Holst; Thim, L; Christensen, M

    1987-01-01

    A modified form of beta-2-microglobulin (beta-2-m) has previously been described to be present in serum from patients suffering from autoimmune diseases, acquired immune deficiency syndrome and small-cell lung cancer [Plesner, T. and Wiik, A. (1979) Scand. J. Immunol. 9, 247-254; Bhalla et al. (1...

  7. The Origins of Al Qaeda’s Ideology: Implications for US Strategy

    Science.gov (United States)

    2005-01-01

    Quintan Wiktorowicz and John Kaltner describe this split between violent and nonvio- lent Salafists, noting the prominence in the latter group of...pp. 254-75. 29. Ibid., p. 297. 30. Quintan Wiktorowicz and John Kaltner, “Killing in the Name of Islam: Al-Qaeda’s Justification for September 11,” Middle East Policy,10 (Summer 2003), 76. 80 Parameters

  8. Development of a ROTC/Army Career Commitment Model. Volume 1

    Science.gov (United States)

    1975-11-01

    respect to demographic differences, a greater proportion of cadets come from military familias and from families that moved around 3 lot vhile the student...Sophomore Perceived Loss of Persona • Control and Individuality .27 .05 Willingness to join ROTC without fin ncial benefits (Item IV-U)g 2.17 2.54 Note

  9. Attainment of Developmental Tasks by Adolescents with Hearing Loss Attending Special Schools

    Science.gov (United States)

    Pinquart, Martin; Pfeiffer, Jens P.

    2014-01-01

    The investigators compared the perceived attainment of developmental tasks by 181 German adolescents with hearing loss and 254 peers without hearing loss. The adolescents with hearing loss were attending special schools for students who are deaf or hard of hearing. On average, the two groups perceived similar levels of success across the assessed…

  10. Mitmetahulisele kultuuripärandile tuleb läheneda terviklikult : pärand / Peeter Mauer, Anton Pärn, Marju Reismaa

    Index Scriptorium Estoniae

    Mauer, Peeter

    2008-01-01

    Kultuuripärandi säilitamisest ja kasutamisest. Vabariigi valitsuse 2008. a. 6. juuni korraldusega nr. 254 kiideti heaks "Eesti kultuuripärandi hoidmise ja väärtustamise arengukava aastani 2030" koostamise ettepanek. Tulevasest arengukavast, mis koondab olemasolevad kultuuripärandiga seotud programmid ja arengukavad ning mille koostamise eest vastutab kultuuriministeerium

  11. Kõrgõzstani vahevalitsus külmutas pangad / Hendrik Vosman

    Index Scriptorium Estoniae

    Vosman, Hendrik

    2010-01-01

    Kõrgõzstani pangasüsteem on külmutatud, sest võimult tõrjutud Kõrgõzstani president Kurmanbek Bakijev olevat enne pealinnast põgenemist tühjendanud riigikassa. Riigi arvel on vaid 254 mln. krooni

  12. Automüük kasvas aastaga kolmandiku võrra / Tõnu Tramm

    Index Scriptorium Estoniae

    Tramm, Tõnu, 1968-

    2005-01-01

    Autode Müügi- ja Teenindusettevõtete Eesti Liidu (AMTEL) andmetel müüdi Eestis 2005. aasta juulis 1654 uut sõiduautot, mida on 33 protsenti rohkem kui juulis 2004. Tarbesõidukeid müüdi juulis 254. Diagramm: Juuli müüduim mark Toyota. Tabel: Müügistatistika 2005

  13. Sügis tõi kaasa veljevarguste laine / Dagne Hanschmidt

    Index Scriptorium Estoniae

    Hanschmidt, Dagne

    2005-01-01

    Ilmunud ka: Postimees : na russkom jazõke 2. dets., lk 12. Vt. ka Postimees : na russkom jazõke 5. dets. lk. 4. 2005. aastal on Tallinnas ja Harjumaal autoratastest ilma jäänud 254 sõidukiomanikku, ühtegi veljevaraste jõuku politsei siiani Tallinnas tabanud ei ole. Diagramm: Autovelgede vargused sagenevad

  14. Kirjad vallutatud Hiinast / Karl Rumor

    Index Scriptorium Estoniae

    Rumor, Karl, pseud., 1886-1971

    2008-01-01

    1937. a. alanud Hiina-Jaapani sõjast, poliitlistest oludest ja revolutsioonist Hiinas, hiinlastest ja Hiina suhetest teiste riikidega. Varem ilmunud: Uus Eesti 19.-20. aug, 1938, nr. 226-227; 12.-13., 16. sept. 1938, nr. 250-251, 254

  15. The Supreme Court of Estonia constitutional judgement 3-3-1-35-10: judgment of the Supreme Court en banc : date of decision 31 August 2011

    Index Scriptorium Estoniae

    2013-01-01

    Kohtulahendi 3-3-1-35-10 (Riigiprokuratuuri ning Politsei- ja Piirivalveameti kassatsioonkaebused Tallinna Ringkonnakohtu 16. veebruari 2010. a otsuse peale haldusasjas nr 3-08-265 Ülar Kaasi (Kaas) kaebuses Eesti Vabariigi tekitatud 254 087 krooni suuruse kahju hüvitamise nõudes) tekst inglise keeles

  16. Calorimetric Measurements of Laser Energy and Power - 1977 Supplement

    Science.gov (United States)

    1977-10-10

    body is in the form of a shallow, slant-bottomed electro - formed copper cup of square cross section. The first absorber is cemented to the bottom of...Actinom- eter for Laser Intensity Measurement in Lasers in Physical Chemistry and Biophysics, J. Joussot- Dubin , Ed. (Elsevier, Amsterdam* 1975). 254. J

  17. Evaluating the Accuracy of Common Runoff Estimation Methods for New Impervious Hot-Mix Asphalt

    Science.gov (United States)

    Accurately predicting runoff volume from impervious surfaces for water quality design events (e.g., 25.4 mm) is important for sizing green infrastructure stormwater control measures to meet water quality and infiltration design targets. The objective of this research was to quan...

  18. Digital Oblique Aerial Cameras (1): A Survey of Features and Systems

    NARCIS (Netherlands)

    Lemmens, M.J.P.M.

    2014-01-01

    It has become customary for me to provide a survey article on digital aerial cameras in the April issue of GIM International every three years. The previous survey (April 2011; vol. 25:4) addressed small, medium and large-format cameras, while in April 2008 (vol. 22:4) the focus was on sensor archit

  19. Data of evolutionary structure change: 1B38A-1WBSA [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1B38A-1WBSA 1B38 1WBS A A -----------------MENFQKVEKIGEGTYGVVYKAR... ALA CA 254 ILE CA 274 1WBS A 1WBSA VKKLSRPFQSIIHA PRO CA 313 ASN CA 408 ILE CA 432 1WBS... A 1WBSA RELRLLKHMKHENV

  20. Choosing adolescent smokers as friends : The role of parenting and parental smoking

    NARCIS (Netherlands)

    Mercken, L.; Sleddens, E. F. C.; de Vries, H.; Steglich, C. E. G.

    2013-01-01

    The present study examined whether parenting and parental smoking can prevent children from selecting smoking friends during adolescence. 254 Adolescents of one Belgian secondary school participated. Self-administered questionnaires were distributed among 2nd-4th graders (mean ages = 14.2-16.2 years

  1. Choosing Adolescent Smokers as Friends: The Role of Parenting and Parental Smoking

    Science.gov (United States)

    Mercken, L.; Sleddens, E. F. C.; de Vries, H.; Steglich, C. E. G.

    2013-01-01

    The present study examined whether parenting and parental smoking can prevent children from selecting smoking friends during adolescence. 254 Adolescents of one Belgian secondary school participated. Self-administered questionnaires were distributed among 2nd-4th graders (mean ages = 14.2-16.2 years) during spring 2006. Follow-up was conducted 12…

  2. Data of evolutionary structure change: 1AKMA-3GD5D [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1AKMA-3GD5D 1AKM 3GD5 A D SGFYHKHFLKLLDFTPAELNSLLQLAAKLKADKKSGKEE...AKLTGKNIALIFEKDSTRTRCSFEVAAYDQGARVTYLGPSGSQIGHKESIKDTARVLGRMYDGIQYRGYGQEIVETLAEYASVPVWNGLTNEFHPTQLLADLLTMQEHLPGKAFNEMTLVYAGD...FAQTELEEYAHYAGIPVINALTDHEHPCQVVADLLTIRENFG--RLAGLKLAYVGDG-NNVAHSLLLGCAKVGMSIAVATPEGFTPDPAVSARASEIAGRTGAEVQIL...LA CA 226 LEU CA 254 LEU CA 357 3GD...5 D 3GD5D TD

  3. Data of evolutionary structure change: 1DDJB-2A7JA [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1DDJ B 1DDJB SLRTR---FGMHF ...e>EEE --- ture> ATOM 2156 CA SER B 578 -33...Chain>A 2A7JA SLQYRSGSSWAHT ure...>EEEEEE EEE > ATOM 123 CA SER A 17 -2.254 -1.296 -1.334 1.00 6...>FITGW-GETQG >EEEE - > ATOM 2957

  4. 77 FR 4821 - Public Health Service Act, Non-competitive Replacement Award

    Science.gov (United States)

    2012-01-31

    ... HUMAN SERVICES Health Resources and Services Administration Public Health Service Act, Non-competitive...: Section 330I(d)(2) of the Public Health Service Act, as amended, 42 U.S.C. 254c-14(d)(2). Catalog of... INFORMATION CONTACT: Monica Cowan, Public Health Analyst, Office for the Advancement of Telehealth, Office...

  5. N-1-Alkylated Pyrimidine Films as a New Potential Optical Data Storage Medium

    DEFF Research Database (Denmark)

    Lohse, Brian; Hvilsted, Søren; Berg, Rolf Henrik;

    2006-01-01

    We investigate several compounds of the type 1,1’-(a,w-alkanediyl)bis[pyrimidinej and 1-(w- bromoalkyl)uracil, which can undergo photoinduced (2jr + 2n) cycloaddition reactions on exposure to UV light at 254 and 257 nm, which have been synthesized for application in high capacity optical data...

  6. 48 CFR 13.302-5 - Clauses.

    Science.gov (United States)

    2010-10-01

    ... requirement unless the existing requirement is deleted. Also, do not delete a paragraph without providing for... cannot be set aside for small business concerns and trade agreements apply (see Subpart 25.4), substitute the clause at FAR 52.225-3, Buy American Act—Free Trade Agreements—Israeli Trade Act, used...

  7. Hemopoietic stem cells in rhesus monkeys : surface antigens, radiosensitivity, and responses to GM-CSF

    NARCIS (Netherlands)

    J.J. Wielenga (Jenne)

    1990-01-01

    textabstractRhesus monkeys (Macaca mulatta) were bred at the Primate Center TNO, Rijswijk, The Netherlands!. Both male and female animals were used for the experiments. The monkeys weighed 2.5-4 kg and were 2-4 years old at the time of the experiment. They were all typed for RhLA-A, -B and -DR antig

  8. Reading Interests of High School Students.

    Science.gov (United States)

    Diaz-Rubin, C.

    1996-01-01

    Investigates the reading genre preferences of 254 male and female high school students in Pennsylvania. Draws comparisons with similar research done 10 years earlier. Finds a substantial change in reading interests. Notes the top 10 areas of interest are adventure, horror, mysteries, humor, murder, love, fantasy, crime, sports, and movies. (RS)

  9. Impact of a Library Instruction Session on Bibliographies of Organic Chemistry Students

    Science.gov (United States)

    Kromer, John

    2015-01-01

    Students in Chemistry 254: Organic Chemistry for Majors were required to write a paper about an organic name reaction. Before turning in this assignment, students had the option of attending a one-hour library instruction session covering SciFinder, sources for spectra, ACS Style, and print resources about organic name reactions. Twenty-five…

  10. Evaluation of a Florida coastal golf complex as a local and watershed source of bioavailable contaminants

    Science.gov (United States)

    Lewis, Michael A., Robert L. Quarles, Darrin D. Dantin and James C. Moore. 2004. Evaluation of a Coastal Golf Complex as a Local and Watershed Source of Bioavailable Contaminants. Mar. Pollut. Bull. 48(3-4):254-262. (ERL,GB 1183). Contaminant fate in coastal areas impacte...

  11. 7 CFR 51.1164 - Fairly well colored.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Fairly well colored. 51.1164 Section 51.1164... STANDARDS) United States Standards for Grades of Florida Oranges and Tangelos Definitions § 51.1164 Fairly... aggregate area of green color which does not exceed the area of a circle 1 inch (25.4 mm) in diameter,...

  12. Handedness and dominant side of symptoms in Parkinson's disease

    NARCIS (Netherlands)

    van der Hoorn, Anouk; Bartels, Anna L.; Leenders, Klaus L.; de Jong, Bauke M.

    2011-01-01

    The aim of this retrospective study was to assess the presence of a possible association between handedness and the side of symptom dominance in 963 patients with Parkinson's disease (PD). In only 287 patients the hand dominance was registered. Out of 254 right-handed patients, 158 (62%) had a right

  13. Synthesis and Larvicidal and Adult Topical Activity of Some Hydrazide-Hydrazone Derivatives Against Aedes aegypti

    Science.gov (United States)

    2014-01-01

    anticancer, antifungal, antiviral, antitumoral, antibacterial and antimalarial activities [11-13]. Recently, our group has been investigating the...Chromatography (HPLC). TLC was performed on 60 F-254 silica gel plates with visualization by UV-light using chloroform and methanol as solvent system

  14. Linkage and association analysis of CACNG3 in childhood absence epilepsy

    DEFF Research Database (Denmark)

    Everett, Kate V; Chioza, Barry; Aicardi, Jean;

    2007-01-01

    Childhood absence epilepsy (CAE) is an idiopathic generalised epilepsy characterised by absence seizures manifested by transitory loss of awareness with 2.5-4 Hz spike-wave complexes on ictal EEG. A genetic component to aetiology is established but the mechanism of inheritance and the genes...

  15. Preliminary Assessment/Site Investigation: Tooele Army Depot, Utah. Volume 1. North Area and Facilities at Hill Air Force Base. Appendixes

    Science.gov (United States)

    1988-12-01

    2,4 ,6-TRINITROBENZALDENYDE ATNT kLPHA-TRINITROTOLUENE (OBSOLETE; USE 246TNT) ATZ ATRAZ1NE AYLETH ALLYL ETHER AZACN AZACYLONONANE B BORON BA BARIUM ... STYPHNATE PCB016 PCB 1016 PCB221 PCB 1221 PCB232 PCB 1232 PCB242 PCB 1242 PCB248 PCB 1248 PCB254 PCB 1254 PCB260 PCB 1260 PCB262 PCB 1262 PCP

  16. Ischemic nucleotide breakdown increases during cardiac development due to drop in adenosine anabolism/catabolism ratio

    NARCIS (Netherlands)

    J.W. de Jong (Jan Willem); E. Keijzer (Elisabeth); T. Huizer (Tom); B. Schoutsen

    1990-01-01

    markdownabstractAbstract Our earlier work on reperfusion showed that adult rat hearts released almost twice as much purine nucleosides and oxypurines as newborn hearts did [Am J Physiol 254 (1988) H1091]. A change in the ratio anabolism/catabolism of adenosine could be responsible for this effect.

  17. Domain Modeling: NP_066574.2 [SAHG[Archive

    Lifescience Database Archive (English)

    Full Text Available NP_066574.2 chr2 CRYSTAL STRUCTURE OF A DESIGNED ZINC FINGER PROTEIN BOUND TO DNA c1meyf_ chr2/NP_066574....2/NP_066574.2_holo_254-335.pdb blast 255K,259C,261E,262C,263G,264K,265A,266F,267F,268D

  18. The Effects of Parental Involvement, Trust in Parents, Trust in Students and Pupil Control Ideology on Conflict Management Strategies of Early Childhood Teachers

    Science.gov (United States)

    Karakus, Mehmet; Savas, Ahmet Cezmi

    2012-01-01

    In this study it was aimed to determine the effects of parental involvement, teachers' trust in parents and students, and teachers' pupil control ideology on the conflict management strategies used by teachers in classroom management. Data were collected from a sample of 254 teachers through paper and pencil questionnaires. Data were analyzed with…

  19. Stuck in the Middle

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Better-paid urban residents aren’t enjoying the life they have expected Sun Lijun works as a software engineer at a Beijing-based IT company and earns around 8,000 yuan ($1,254) a month. His relatively high income means his friends and colleagues, as well as China’s statistical agencies,

  20. 77 FR 11190 - Yokohama Tire Company, Denial of Petition for Decision of Inconsequential Noncompliance

    Science.gov (United States)

    2012-02-24

    ... passenger car replacement tires failed to comply with paragraph S5.5.1 of Federal Motor Vehicle Safety... requirements of 49 U.S.C. Chapter 301 on the basis that this noncompliance is inconsequential to motor vehicle... a noncompliance in approximately 6,254 \\2\\ P215/60R15 93H AVID H4S passenger car replacement...

  1. Domain Modeling: NP_057507.2 [SAHG[Archive

    Lifescience Database Archive (English)

    Full Text Available NP_057507.2 chr14 Aart, a six finger zinc finger designed to recognize ANN triplets... c2i13b_ chr14/NP_057507.2/NP_057507.2_holo_27-178.pdb psi-blast 254R,256A,257T,258P,259T,260P,263A,265P,276

  2. Simultaneous Elimination of Formaldehyde and Ozone Byproduct Using Noble Metal Modified TiO2 Films in the Gaseous VUV Photocatalysis

    Directory of Open Access Journals (Sweden)

    Pingfeng Fu

    2012-01-01

    Full Text Available Simultaneous removal of low concentration formaldehyde (HCHO and ozone byproduct was investigated in the gaseous VUV (vacuum ultraviolet photocatalysis by using noble metal modified TiO2 films. Noble metal (Pt, Au, or Pd nanoparticles were deposited on TiO2 films with ultrafine particle size and uniform distribution. Under 35 h VUV irradiation, the HCHO gas (ca. 420 ppbv was dynamically degraded to a level of 10~45 ppbv without catalyst deactivation, and over 50% O3 byproduct was in situ decomposed in the reactor. However, under the same conditions, the outlet HCHO concentration remained at 125~178 ppbv in the O3 + UV254 nm photocatalysis process and 190~260 ppbv in the UV254 nm photocatalysis process. And the catalyst deactivation also appeared under UV254 nm irradiation. Metallic Pt or Au could simultaneously increase the elimination of HCHO and ozone, but the PdO oxide seemed to inhibit the HCHO oxidation in the UV254 nm photocatalysis. Deposition of metallic Pt or Au reduces the recombination of h+/e− pairs and thus increases the HCHO oxidation and O3 reduction reactions. In addition, adsorbed O3 may be partly decomposed by photogenerated electrons trapped on metallic Pt or Au nanoparticles under UV irradiation.

  3. Does Lecture Capturing Impact Student Performance and Attendance in an Introductory Accounting Course?

    Science.gov (United States)

    Aldamen, Husam; Al-Esmail, Rajab; Hollindale, Janice

    2015-01-01

    The study empirically examines the interplay between lecture capturing viewership, performance and attendance for students in the Middle Eastern country of Qatar. The sample consists of 254 students enrolled in an introductory accounting class either in the Fall semester or in the Spring semester. We show a weak positive relationship between…

  4. BILE SECRETION OF SULFATED GLYCOLITHOCHOLIC ACID IS REQUIRED FOR ITS CHOLESTATIC ACTION IN RATS

    NARCIS (Netherlands)

    KUIPERS, F; HARDONK, MJ; VONK, RJ; VANDERMEER, R

    1992-01-01

    To test our hypothesis that the cholestatic action of sulfated glycolithocholic acid (SGLC) in the rat is related to its interaction with calcium in the biliary tree [R. van der Meer, R. J. Vonk, and F. Kuipers. Am. J. Physiol. 254 (Gastrointest. Liver Physiol. 17): G644-G649, 1988], we have now com

  5. Foetus Body Mass Prepartal Assesment in Clinical Practice

    OpenAIRE

    Pavić Lugović, Lenija; Klarić, Petar; Lugović, Liborija

    2007-01-01

    The aim of study was to examine the importance of foetus body mass prepartal assessment in normal term pregnancy. The study comprised 254 pregnant women with single pregnancy, without congenital anomalies, residing in urban (Zagreb) and small towns (Samobor, Jastrebarsko). Higher birth mass was measured in male than in female newborns, and the difference was statistically significant (p

  6. Characterizing Lenses and Lensed Stars of High-magnification Single-lens Gravitational Microlensing Events with Lenses Passing over Source Stars

    DEFF Research Database (Denmark)

    Choi, J.-Y.; Shin, I.-G.; Park, S.-Y.

    2012-01-01

    We present the analysis of the light curves of nine high-magnification single-lens gravitational microlensing events with lenses passing over source stars, including OGLE-2004-BLG-254, MOA-2007-BLG-176, MOA-2007-BLG-233/OGLE-2007-BLG-302, MOA-2009-BLG-174, MOA-2010-BLG-436, MOA-2011-BLG-093, MOA-...

  7. Prevalence of Clinically and Empirically Defined Talents and Strengths in Autism

    Science.gov (United States)

    Meilleur, Andrée-Anne S.; Jelenic, Patricia; Mottron, Laurent

    2015-01-01

    Outstanding skills, including special isolated skills (SIS) and perceptual peaks (PP) are frequent features of autism. However, their reported prevalence varies between studies and their co-occurrence is unknown. We determined the prevalence of SIS in a large group of 254 autistic individuals and searched for PP in 46 of these autistic individuals…

  8. GAE网络平台所需环境

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    目前,GAE支持Python和AVA语言,要在本机搭建GAE开发环境,需分别安装GAESDK(http://{inyurl.COm/ozebre)及Pythol3(http://worknewhua.com/clan/201008/python254msi)或JAVA(http://www.javacom/zh—CN/)。

  9. Paths to subreplacement fertility : the empirical evidence / Tomas Frejka, John Ross

    Index Scriptorium Estoniae

    Frejka, Tomas

    2001-01-01

    Autorid väidavad, et paljudes riikides jääb sündimus ka edaspidi väga madalaks. Vaadeldakse 54 riigis abielude sõlmimist, rasestumisvastaste vahendite kasutamist ja abortide arvu. Diagrammid ja tabelid. Lisa lk. 213-254

  10. Dieren in het geding : een juridisch-historische analyse van het verbod op dierenmishandeling

    NARCIS (Netherlands)

    de Bordes, E.C.

    2010-01-01

    In 1886 the Criminal Code first came into effect. It stipulated, in article 254, that maltreatment of an animal was a crime. Sanctions could be imprisonment for a period of up to three months, or a fine of 120 guilders at most. Maltreatment was not defined. The basic principle underlying the penal p

  11. Pharmacokinetics of Niacinamide in Blood and Skin of Hairless Guinea Pigs

    Science.gov (United States)

    1993-05-13

    Products Division. Maumee, Ohio/ Delphi , ID, U.S.A.) which was changed three times per week. Commercial certified guinea pig ration (Ziegler Bros.. Inc...HPLC Equipment included an LC-6A chromatograph equipped %vith an SIC- 6B auto injector , SCL-6B system controller, SPD-6A UV Detector (D2 lamp 254 nm

  12. Mexican American Female Adolescent Self-Esteem: The Effect of Body Image, Exercise Behavior, and Body Fatness.

    Science.gov (United States)

    Guinn, Bobby; Semper, Tom; Jorgensen, Layne

    1997-01-01

    A study of 254 Mexican American eighth-grade girls in south Texas found that girls' self-esteem was positively related to body image and exercise involvement and negatively related to body fatness. This population displayed somewhat distorted body image, which was the strongest predictor of self-esteem. Contains 43 references. (SV)

  13. SURVEY ON THE PRESENCE OF POLYCHLOROBIPHENYLS (PCBs ON FISHES OF PIEDILUCO LAKE (TERNI, CENTRAL ITALY

    Directory of Open Access Journals (Sweden)

    M. Latini

    2013-02-01

    Full Text Available During the period 2004-2006, 254 specimen belonging to Ciprinidae, Percidae and Anguillidae fishes of Piediluco Lake were analyzed by gas chromatography to check for the presence of PCBs contamination. Data obtained show low level of contamination with a decreasing trend from 2004 to 2006.

  14. Zooplankton Avoidance of a Profiled Open-Path Fluorometer

    Science.gov (United States)

    2010-01-01

    gastropods , or those with air inclusions suggest that we can reasonably use 200 kHz scattering as an estimate of relative abundance of these...finite-length cylinders with applications to sound scattering by zooplankton. J. Acoust. Soc. Am., 103, 254. Stearns, D. and Forward, R. (1984

  15. Resetting the T Cell Repertoire in Prostate Cancer Bearing Host

    Science.gov (United States)

    2009-03-01

    Immunol 15: 535 562. 16. Kronenberg M, Gapin L (2002) The unconventional lifestyle of NKT cells. Nat Rev Immunol 2: 557 568. 17. Matsuda JL, Gapin L...cells. Curr Opin Immunol 14: 250 254. 24. Gapin L, Matsuda JL, Surh CD, Kronenberg M (2001) NKT cells derive from double-positive thymocytes that are

  16. Hollow-Core Fiber Lamp

    Science.gov (United States)

    Yi, Lin (Inventor); Tjoelker, Robert L. (Inventor); Burt, Eric A. (Inventor); Huang, Shouhua (Inventor)

    2016-01-01

    Hollow-core capillary discharge lamps on the millimeter or sub-millimeter scale are provided. The hollow-core capillary discharge lamps achieve an increased light intensity ratio between 194 millimeters (useful) and 254 millimeters (useless) light than conventional lamps. The capillary discharge lamps may include a cone to increase light output. Hollow-core photonic crystal fiber (HCPCF) may also be used.

  17. O sistemah stihhoslozhenija (preimushtshestvenno na materjale estonskogo i russkogo stihha") / Mihhail Lotman

    Index Scriptorium Estoniae

    Lotman, Mihhail, 1952-

    1998-01-01

    Bibl. lk. 250-253. Kokkuvõte inglise k. "On systems of versification (mostly in russian and Estonian poetry), lk. 253-254. Kokkuvõte eesti k. "Värsisüsteemidest (peamiselt eesti ja värsi näitel). Eesti k. ilmunud: Akadeemia, 1998, nr. 9 ja 10

  18. Effectiveness of penicillin, dicloxacillin and cefuroxime for penicillin-susceptible Staphylococcus aureus bacteraemia

    DEFF Research Database (Denmark)

    Nissen, Jette Lindbjerg; Skov, Robert; Knudsen, Jenny Dahl;

    2013-01-01

    compared with penicillin (adjusted HR 2.54, 95% CI 1.49-4.32). Other variables that were statistically significantly associated with 30 day mortality included increasing age, disease severity and a primary respiratory focus. Osteomyelitis/arthritis was associated with a lower risk of death than were other...

  19. Drug: D00254 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available 254.gif Antineoplastic [DS:H00010 H00042] Same as: C06873 Therapeutic category: 4219 ATC code: L01AD01 map07040 Antineoplastics...ng cellular function 42 Antineoplastics 421 Alkylating agents 4219 Others D00254 ...mustine D00254 Carmustine (JAN/USAN/INN) Antineoplastics [BR:br08308] Alkylating

  20. Shyness and Vocabulary: The Roles of Executive Functioning and Home Environmental Stimulation

    Science.gov (United States)

    Blankson, A. Nayena; O'Brien, Marion; Leerkes, Esther M.; Marcovitch, Stuart; Calkins, Susan D.

    2011-01-01

    Although shyness has often been found to be negatively related to vocabulary, few studies have examined the processes that produce or modify this relation. The present study examined executive functioning skills and home environmental stimulation as potential mediating and moderating mechanisms. A sample of 3 1/2-year-old children (N = 254) was…

  1. Book review of “The Biomedical Engineering Handbook” fourth edition, edited by Joseph D. Bronzino, Donald R. Peterson

    OpenAIRE

    Koprowski, Robert

    2016-01-01

    This article is a review of the book “The biomedical engineering handbook”, fourth edition: four volume set (ISBN 9781439825334, 254GBP, 5430 pages) edited by Joseph D. Bronzino and Donald R. Peterson published by the CRC Press Taylor & Francis group in 2015. The content of the book and its importance for biomedical engineering have been discussed in this invited review.

  2. Sequence Classification: 773280 [

    Lifescience Database Archive (English)

    Full Text Available cted CDS, cell Division Cycle related (cdc-25.4) || http://www.ncbi.nlm.nih.gov/protein/17532605 ... ...Non-TMB Non-TMH Non-TMB Non-TMB Non-TMB Non-TMB >gi|17532605|ref|NP_496197.1| predi

  3. Minimization of the formation of disinfection by-products.

    Science.gov (United States)

    Badawy, Mohamed I; Gad-Allah, Tarek A; Ali, Mohamed E M; Yoon, Yeoman

    2012-09-01

    The drinking water industry is required to minimize DBPs levels while ensuring adequate disinfection. In this study, efficient and appropriate treatment scheme for the reduction of disinfection by-product (DBPs) formation in drinking water containing natural organic matter has been established. This was carried out by the investigation of different treatment schemes consisting of enhanced coagulation, sedimentation, disinfection by using chlorine dioxide/ozone, filtration by sand filter, or granular activated carbon (GAC). Bench scale treatment schemes were applied on actual samples from different selected sites to identify the best conditions for the treatment of water. Samples were collected from effluent of each step in the treatment train in order to analyze pH, UV absorbance at 254 nm (UVA(254)), specific UV absorbance at 254 nm (SUVA(254)), dissolved organic carbon (DOC), haloacetic acids (HAAs) and trihalomethanes (THMs). The obtained results indicated that using pre-ozonation/enhanced coagulation/activated carbon filtration treatment train appears to be the most effective method for reducing DBPs precursors in drinking water treatment.

  4. Comparison of advanced oxidation processes for the removal of natural organic matter.

    Science.gov (United States)

    Lamsal, Rupa; Walsh, Margaret E; Gagnon, Graham A

    2011-05-01

    This study examined the impact of UV, ozone (O(3)), advanced oxidation processes (AOPs) including O(3)/UV, H(2)O(2)/UV H(2)O(2)/O(3) in the change of molecular weight distribution (MWD) and disinfection by-product formation potential (DBPFP). Bench-scale experiments were conducted with surface river water and changes in the UV absorbance at 254 nm (UV(254)), total organic carbon (TOC), trihalomethane and haloacetic acid formation potential (THMFP, HAAFP) and MWD of the raw and oxidized water were analyzed to evaluate treatment performance. Combination of O(3) and UV with H(2)O(2) was found to result in more TOC and UV(254) reduction than the individual processes. The O(3)/UV process was found to be the most effective AOP for NOM reduction, with TOC and UV(254) reduced by 31 and 88%, respectively. Application of O(3)/UV and H(2)O(2)/UV treatments to the source waters organics with 190-1500 Da molecular weight resulted in the near complete alteration of the molecular weight of NOM from >900 Da to UV was found to be the most effective treatment for the reduction of THM and HAA formation under uniform formation conditions. These results could hold particular significance for drinking water utilities with low alkalinity source waters that are investigating AOPs, as there are limited published studies that have evaluated the treatment efficacy of five different oxidation processes in parallel.

  5. Development of surrogate correlation models to predict trace organic contaminant oxidation and microbial inactivation during ozonation.

    Science.gov (United States)

    Gerrity, Daniel; Gamage, Sujanie; Jones, Darryl; Korshin, Gregory V; Lee, Yunho; Pisarenko, Aleksey; Trenholm, Rebecca A; von Gunten, Urs; Wert, Eric C; Snyder, Shane A

    2012-12-01

    The performance of ozonation in wastewater depends on water quality and the ability to form hydroxyl radicals (·OH) to meet disinfection or contaminant transformation objectives. Since there are no on-line methods to assess ozone and ·OH exposure in wastewater, many agencies are now embracing indicator frameworks and surrogate monitoring for regulatory compliance. Two of the most promising surrogate parameters for ozone-based treatment of secondary and tertiary wastewater effluents are differential UV(254) absorbance (ΔUV(254)) and total fluorescence (ΔTF). In the current study, empirical correlations for ΔUV(254) and ΔTF were developed for the oxidation of 18 trace organic contaminants (TOrCs), including 1,4-dioxane, atenolol, atrazine, bisphenol A, carbamazepine, diclofenac, gemfibrozil, ibuprofen, meprobamate, naproxen, N,N-diethyl-meta-toluamide (DEET), para-chlorobenzoic acid (pCBA), phenytoin, primidone, sulfamethoxazole, triclosan, trimethoprim, and tris-(2-chloroethyl)-phosphate (TCEP) (R(2) = 0.50-0.83) and the inactivation of three microbial surrogates, including Escherichia coli, MS2, and Bacillus subtilis spores (R(2) = 0.46-0.78). Nine wastewaters were tested in laboratory systems, and eight wastewaters were evaluated at pilot- and full-scale. A predictive model for OH exposure based on ΔUV(254) or ΔTF was also proposed.

  6. Development of Conceptual Designs for the Prevention of Ice Formation in the Proposed Maple River Aqueduct

    Science.gov (United States)

    2014-09-18

    10 2.3.3 Briare Aqueduct...10 6 Briare Aqueduct (Clair 2006...years Briare Canal, Châtillon-sur- Loire, France 1896 Steel 20 × 7 × 2170 ft 85 ft 40 ft 76 254 Loire River/ Loire to Briare Canals Sluices to

  7. Change in Autism Classification with Early Intervention: Predictors and Outcomes

    Science.gov (United States)

    Ben Itzchak, Esther; Zachor, Ditza A.

    2009-01-01

    The current study characterized stability and changes of autism diagnostic classification with intervention in very young children and examined pre-treatment predictors and post-intervention outcome. Sixty-eight children diagnosed with autism, aged 18-35 months (M = 25.4, SD = 4.0) participated in the study. Children underwent comprehensive…

  8. Disease: H00906 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available H00906 Macrocephaly, alopecia, cutis laxa, and scoliosis; MACS syndrome Macrocephal...y, alopecia, cutis laxa, and scoliosis is an autosomal-recessive disorder related to the cutis laxa group of...val hypertrophy, retrognathia with abnormal skull morphology, and severe scoliosis...haly, alopecia, cutis laxa, and scoliosis: MACS syndrome. Am J Hum Genet 85:254-6

  9. Healthcare Service Use and Costs for Autism Spectrum Disorder: A Comparison between Medicaid and Private Insurance

    Science.gov (United States)

    Wang, Li; Mandell, David S.; Lawer, Lindsay; Cidav, Zuleyha; Leslie, Douglas L.

    2013-01-01

    Healthcare costs and service use for autism spectrum disorder (ASD) were compared between Medicaid and private insurance, using 2003 insurance claims data in 24 states. In terms of costs and service use per child with ASD, Medicaid had higher total healthcare costs (22,653 vs. 5,254), higher ASD-specific costs (7,438 vs. 928), higher psychotropic…

  10. Growing up with Frisian and Dutch: The role of language input in the early development of Frisian and Dutch among preschool children in Friesland

    NARCIS (Netherlands)

    J.E. Dijkstra

    2013-01-01

    Bilingual acquisition largely depends on the input that children receive in each language. The more input in a language, the more proficient a child becomes in that language. The current project studied the role of language input among bilingual Frisian-Dutch preschool children (age 2.5-4 years) in

  11. Ontwikkelingsplannen

    NARCIS (Netherlands)

    J. Tinbergen (Jan)

    1967-01-01

    textabstractSeries ‘Wereldakademie’ No. 18. In English: Development Planning, Series World University Library No. 18, Weidenfeld and Nicolson, London, 1967, 256 p. In Spanish: Planificacion del Desarrollo, Series ‘Biblioteca para el Hombre Actual’, Ediciones Guadarrama, Madrid, 1967, 254 p. In Ger

  12. Wives' Relative Wages, Husbands' Paid Work Hours, and Wives' Labor-Force Exit

    Science.gov (United States)

    Shafer, Emily Fitzgibbons

    2011-01-01

    Economic theories predict that women are more likely to exit the labor force if their partners' earnings are higher and if their own wage rate is lower. In this article, I use the National Longitudinal Survey of Youth (N = 2,254) and discrete-time event-history analysis to show that wives' relative wages are more predictive of their exit than are…

  13. Data of evolutionary structure change: 1DJ2A-1ADIB [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1DJ2A-1ADIB 1DJ2 1ADI A B IGSLSQVSGVLGCQWGDEGKGKLVDILAQHFDIVARCQG...LLSEACPLILDYHVALDNAREKARGAKAIGTTGRGIGPAYEDKVARRGLRVGDLFDKETFAEKLKEVMEYHNFQLVNYYKAEAVDYQKVLDDTMAVADI... CA 196 PHE CA 264 LYS CA 225 TYR CA 254 1ADI... B 1ADIB 1 1ADI B 1ADI

  14. The Cauchy Problem for the 3-D Vlasov-Poisson System with Point Charges

    Science.gov (United States)

    Marchioro, Carlo; Miot, Evelyne; Pulvirenti, Mario

    2011-07-01

    In this paper we establish global existence and uniqueness of the solution to the three-dimensional Vlasov-Poisson system in the presence of point charges with repulsive interaction. The present analysis extends an analogous two-dimensional result (Caprino and Marchioro in Kinet. Relat. Models 3(2):241-254, 2010).

  15. An Analysis of Organizational Behavior Management Research in Terms of the Three-Contingency Model of Performance Management

    Science.gov (United States)

    Weatherly, Nicholas L.; Malott, Richard W.

    2008-01-01

    The three-contingency model of performance management (Malott, 1992, 1993, 1999) was used to analyze interventions in the "Journal of Organizational Behavior Management (JOBM)" from the years 1990 through 2005 (Volume 11[1]-Volume 25[4]). The current article extends previous reviews (Malott, Shimamune, & Malott, 1992; Otto & Malott, 2004) by…

  16. Effects of Participation in a Martial Arts-Based Antibullying Program in Elementary Schools

    Science.gov (United States)

    Twemlow, Stuart W.; Biggs, Bridget K.; Nelson, Timothy D.; Vernberg, Eric M.; Fonagy, Peter; Twemlow, Stephen W.

    2008-01-01

    This study evaluated the Gentle Warrior Program, a traditional martial arts-based intervention to reduce aggression in children, as it was implemented in three elementary schools. The sample consisted of 254 children in grades 3, 4, and 5 who participated in the Gentle Warrior Program as part of a larger school violence intervention. Results…

  17. Dicty_cDB: SHB225 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available J132370 |pid:none) Allogromia sp. mRNA for actin 1. 254 6e-66 AY452189_1( AY452189 |pid:none) Sorosphaera veronica...e actin 1 gene... 248 4e-64 AY452190_1( AY452190 |pid:none) Sorosphaera veronicae actin 2 gene... 248

  18. 76 FR 81954 - Agency Information Collection Activities: Submission for Review; Information Collection Request...

    Science.gov (United States)

    2011-12-29

    ..., companies will consent to making this information public. In turn, the emergency response community will use...) 254-6171. (Not a toll-free number). Mail: Science and Technology Directorate, ATTN: Chief Information... technological collection techniques or other forms of information technology, e.g., permitting...

  19. Genome wide high density SNP-based linkage analysis of childhood absence epilepsy identifies a susceptibility locus on chromosome 3p23-p14

    DEFF Research Database (Denmark)

    Chioza, Barry A; Aicardi, Jean; Aschauer, Harald;

    2009-01-01

    Childhood absence epilepsy (CAE) is an idiopathic generalised epilepsy (IGE) characterised by typical absence seizures manifested by transitory loss of awareness with 2.5-4 Hz spike-wave complexes on ictal EEG. A genetic component to the aetiology is well recognised but the mechanism of inheritance...

  20. AcEST: BP917622 [AcEST

    Lifescience Database Archive (English)

    Full Text Available terized protein MG098 OS=Mycoplasma... 31 3.6 sp|Q8MQW8|SPRI_DROME Protein sprint OS=Drosophila melanogaster...FN 254 Query: 444 Y 446 Y Sbjct: 255 Y 255 >sp|Q8MQW8|SPRI_DROME Protein sprint OS=Drosophila melanogaster G

  1. Evaluations of the TiO2/simulated solar UV degradations of XAD fractions of natural organic matter from a bog lake using size-exclusion chromatography.

    Science.gov (United States)

    Valencia, Sergio; Marín, Juan M; Restrepo, Gloria; Frimmel, Fritz H

    2013-09-15

    This work reports on the changes in compositions of humic acids (HAs) and fulvic acids (FAs) during photocatalytic degradation. The HAs and FAs were obtained from the XAD-resin fractionation of natural-organic matter (NOM) from a bog lake (Lake Hohloh, Black Forest, Germany). Degussa P-25 titanium dioxide (TiO2) in a suspension and a solar UV simulator (batch reactor) were used in the experiments. The photocatalytic degradation of the HAs and FAs were monitored using size-exclusion chromatography (SEC) equipped with dissolved organic carbon (DOC) and ultraviolet (UV254) detection (SEC-DOC and SEC-UV254) and UV-Vis spectrophotometry. The evolutions of the photocatalytic degradations of the HA and FA fractions were selective. The photocatalytic degradation started with the degradations of high molecular weight compounds with relatively high UV254 absorbances in the HA and FA fractions to yield low molecular weight compounds showing less specific UV254 absorbances. Observance of the same tendency for the original NOM from Lake Hohloh indicates that these XAD-fractions still having complex compound mixtures. However, the larger molecular weight fractions of the FAs showed higher preferential adsorptions onto TiO2, which caused their faster degradation rates. Furthermore, FAs showed a greater reduction of the total THM formation potential (TTHMFP) and the organic halogen compounds adsorbable on activated carbon formation potential (AOXFP), in comparison with the HAs.

  2. Discrepancies between Parents' and Children's Attitudes toward TV Advertising

    Science.gov (United States)

    Baiocco, Roberto; D'Alessio, Maria; Laghi, Fiorenzo

    2009-01-01

    The authors conducted a study with 500 parent-child dyads. The sample comprised 254 boys and 246 girls. The children were grouped into 5 age groups (1 group for each age from 7 to 11 years), with each group comprising 100 children. The survey regards discrepancies between children and their parents on attitudes toward TV advertising to determine…

  3. Cyberbullying and Victimisation among Turkish University Students

    Science.gov (United States)

    Akbulut, Yavuz; Eristi, Bahadir

    2011-01-01

    This study investigated the extent of cyberbullying and victimisation among Turkish university students at a state college of education. A personal information form and 56 scaled items were administered to 254 students. Items addressing cyberbullying victimisation were adopted from a recent study, whereas parallel cyberbullying items were…

  4. [ANIMAL TOXOCARIASIS IN A MEGALOPOLIS: EPIDEMIC ASPECTS].

    Science.gov (United States)

    Panova, O A; Glamazdin, I G; Spiridonov, S E

    2015-01-01

    The prevalence of toxocariasis was studied among a population of domestic and stray dogs and cats. In a megalopolis, Toxocara invasion was 31.6% in a population of cats and 82 and 25.4% in that of puppies and dogs, respectively. A method was developed for the molecular genetic identification of T. cati and T. canis.

  5. AcEST: BP915102 [AcEST

    Lifescience Database Archive (English)

    Full Text Available IYAKLGKFEDALLVCRQM 19 L GY G VE + + M I PD ++ L+ YAK GK + A+LV +M Sbjct: 343 LQGYATKGALVEMHGLLDLMVRNGIHPDHYVFSILICA...NSLIAVCSRGHMWEE 358 G P+ ++ +I A K G +AM F +M ++G++P+ +T+ ++I + + E+ Sbjct: 366 GIHPDHYVFSILICAYAKQG-KVDQAML...+ A+LV +M Sbjct: 346 LQGYATKGALVEMHGLLDLMVRNGIHPNHYVFSILICAYAKQGKVDQAMLVFSKM 400 Score = 102 bits (254), Exp

  6. Gclust Server: 159184 [Gclust Server

    Lifescience Database Archive (English)

    Full Text Available 159184 PPT_230588 Cluster Sequences - 254 fgenesh2_pg.scaffold_109000001; no annota...tion 1 1.00e-99 14.29 0.0 0.0 0.0 0.0 0.0 Show 159184 Cluster ID 159184 Sequence ID PPT_230588 Link to clust

  7. MATHEMATICAL GEOLOGY

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>20042360 Feng Zhihan (Geological Survey of Gansu Province, Lanzhou, Gansu) Adjustment of Gravitational Base Point Net Using MATLAB (Computing Techniques for Geophysical and Geochemical Exploration, ISSN 1001-1749, CN51-1242/P, 25(4), 2003, p. 336-339, 1 illus. , 3 refs. )

  8. InterProScan Result: FS858176 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available FS858176 FS858176_5_ORF1 254F313A614617BC PANTHER PTHR11511 INSECT HEMOCYANIN-RELAT...ED 6.7e-33 T IPR013788 Arthropod hemocyanin/insect LSP Molecular Function: oxygen transporter activity (GO:0005344)|Biological Process: transport (GO:0006810) ...

  9. Experiment list: SRX105458 [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ROGENITOR CELLS that have migrated to the THYMUS where they differentiate into T-LYMPHOCYTES. Thymocytes are classified into maturati...onal stages based on the expression of CELL SURFACE ANTIGENS. 9645968,97.1,72.6,254

  10. Self-assembled nanoparticles of modified-chitosan conjugates for the sustained release of dl-α-tocopherol

    DEFF Research Database (Denmark)

    Quinones, Javier Perez; Gothelf, Kurt Vesterager; Kjems, Jørgen

    2013-01-01

    Synthetic O6-succinylated chitosan and commercial glycol chitosan were covalently linked to dl-α-tocopheryl monoesters for controlled release of vitamin E. These conjugates formed self-assembled nanoparticles in aqueous solution with 254–496 nm mean diameters and dl-α-tocopherol contents between 27...

  11. UV-C light inactivation kinetics of Penicillium expansum on pear surfaces: Influence on physicochemical and sensory quality during storage

    Science.gov (United States)

    Postharvest quality and storage life of fresh pear are often limited by fungal growth caused by Penicillium expansum. Ultraviolet-C light (UV-C 254 nm) is a promising alternative disinfestation method to reduce fruit spoilage by fungi. In this study, UV-C inactivation kinetic data of Penicillium exp...

  12. Ultraviolet-C light inactivation of Penicillium expansum on fruit surfaces

    Science.gov (United States)

    Understanding the influence of fruit surface morphology on ultraviolet-C (UV-C 254 nm) inactivation of microorganisms is required for designing effective treatment systems. In this study, we analyzed UV-C inactivation of Penicillium expansum that was inoculated onto the surface of organic fruits. Re...

  13. Evaluation of Residential Consumers Knowledge of Wireless Network Security and Its Correlation with Identity Theft

    Science.gov (United States)

    Kpaduwa, Fidelis Iheanyi

    2010-01-01

    This current quantitative correlational research study evaluated the residential consumers' knowledge of wireless network security and its relationship with identity theft. Data analysis was based on a sample of 254 randomly selected students. All the study participants completed a survey questionnaire designed to measure their knowledge of…

  14. Gclust Server: 88110 [Gclust Server

    Lifescience Database Archive (English)

    Full Text Available 88110 CME_CMH173C Cluster Sequences Related Sequences(254) 358 similar to mitochond...rial uncoupling protein 1 9.98e-01 14.29 0.0 0.0 0.0 0.0 0.0 Show 88110 Cluster ID 88110 Sequence ID CME_CMH17

  15. Dicty_cDB: SFG565 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 5060.1 Dictyostelium discoideum Wiscott-Aldrich syndrome protein (wasA) gene, complete cds. 626 0.0 8 AC1170...bits) Value AF305060_1( AF305060 |pid:none) Dictyostelium discoideum Wiscott-A... 254 4e-77 AC117076_18( AC1

  16. Levels of Phonological Awareness, Working Memory, and Lexical Knowledge in Elementary School Children

    OpenAIRE

    Heloisa Helena Motta Bandini; Flavia Heloisa Santos; Deisy das Gracas de Souza

    2013-01-01

    Relationships between oral language, phonological awareness, and working memory have been empirically demonstrated, however, phonological awareness encompasses different abilities, assessed at different levels. The present study investigated the possible associations between specific phonological awareness abilities and phonological working memory in first-grade students. In the initial phase (n = 254), the study evaluated the abilities of phonological awareness and phonological working memor...

  17. Saber hacer y hacer saber

    Directory of Open Access Journals (Sweden)

    Liliana Rojas

    2016-12-01

    En el tablao… Un estudio sobre los procesos de aprendizaje en el baile flamenco. Francisco Jiménez Romero; Alcaldía Mayor de Bogotá, Gerencia de Danza del Idartes, Alambique Editores, Bogotá, 2012, 254 págs.

  18. Data of evolutionary structure change: 1GAEO-3CIFB [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1GAEO-3CIFB 1GAE 3CIF O B TIKVGINGFGRIGRIVFRAAQKRSDIEIVAINDL-LDAD...P CA 250 ALA CA 317 ASP CA 257 TYR CA 254 3CIF... B 3CIFB ILE CA 425 VAL CA 453 SER CA 508 3CIF... B 3CIFB TEYDPSKFNVI

  19. Data of evolutionary structure change: 1CERO-3CIFC [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1CERO-3CIFC 1CER 3CIF O C -MKVGINGFGRIGRQVFRILHSRG-VEVALINDL-TDNK...434 ALA CA 375 LEU CA 455 3CIF C 3CIFC CMERNDIT.../line> LYS CA 254 THR CA 266 3CIF... C 3CIFC AINDPFMDVEY

  20. Data of evolutionary structure change: 1GAEO-3CIFD [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1GAEO-3CIFD 1GAE 3CIF O D TIKVGINGFGRIGRIVFRAAQKRSDIEIVAINDLL-DAD...17 ASP CA 257 TYR CA 254 MET CA 368 3CIF... D 3CIFD 3CIF D 3CIFD ...YS CA 137 ASP CA 200 TRP CA 189 ARG CA 259

  1. Data of evolutionary structure change: 1GAEO-3CIFA [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available 1GAEO-3CIFA 1GAE 3CIF O A TIKVGINGFGRIGRIVFRAAQKRSDIEIVAINDL-LDAD...P CA 250 ALA CA 317 ASP CA 257 TYR CA 254 3CIF... A 3CIFA 3CIF A 3CIFA NTEY...ne> ASP CA 200 TRP CA 189 ARG CA 259 3CIF

  2. BACTERIOPHAGE AND MICROSPHERE TRANSPORT IN SATURATED POROUS MEDIA: FORCED-GRADIENT EXPERIMENT AT BORDEN, ONTARIO

    Science.gov (United States)

    A two-well forced-gradient experiment involving virus and microsphere transport was carried out in a sandy aquifer in Borden, Ontario, Canada. Virus traveled at least a few meters in the experiment, but virus concentrations at observation points 1 and 2.54 m away from the injecti...

  3. Severe Pain Predicts Greater Likelihood of Subsequent Suicide

    Science.gov (United States)

    Ilgen, Mark A.; Zivin, Kara; Austin, Karen L.; Bohnert, Amy S. B.; Czyz, Ewa K.; Valenstein, Marcia; Kilbourne, Amy M.

    2010-01-01

    Using data from the 1999 Large Health Survey of Veterans, Veterans Affairs' medical records, and the National Death Index (N = 260,254), the association between self-reported pain severity and suicide among veterans as examined, after accounting for demographic variables and psychiatric diagnoses. A Cox proportional hazards regression demonstrated…

  4. Integration of biofiltration and advanced oxidation processes for tertiary treatment of an oil refinery wastewater aiming at water reuse.

    Science.gov (United States)

    Nogueira, A A; Bassin, J P; Cerqueira, A C; Dezotti, M

    2016-05-01

    The combination of biological and chemical oxidation processes is an interesting approach to remove ready, poor, and non-biodegradable compounds from complex industrial wastewaters. In this study, biofiltration followed by H2O2/UV oxidation (or microfiltration) and final reverse osmosis (RO) step was employed for tertiary treatment of an oil refinery wastewater. Biofiltration alone allowed obtaining total organic carbon (TOC), chemical oxygen demand (COD), UV absorbance at 254 nm (UV254), ammonium, and turbidity removal of around 46, 46, 23, 50, and 61 %, respectively. After the combined biological-chemical oxidation treatment, TOC and UV254 removal amounted to 88 and 79 %, respectively. Whereas, the treatment performance achieved with different UV lamp powers (55 and 95 W) and therefore distinct irradiance levels (26.8 and 46.3 mW/cm(2), respectively) were very similar and TOC and UV254 removal rates were highly affected by the applied C/H2O2 ratio. Silt density index (SDI) was effectively reduced by H2O2/UV oxidation, favoring further RO application. C/H2O2 ratio of 1:4, 55 W UV lamp, and 20-min oxidation reaction corresponded to the experimental condition which provided the best cost/benefit ratio for TOC, UV254, and SDI reduction from the biofilter effluent. The array of treatment processes proposed in this study has shown to be adequate for tertiary treatment of the oil refinery wastewater, ensuring the mitigation of membrane fouling problems and producing a final effluent which is suitable for reuse applications.

  5. The Effect of Conformational Variability of Phosphotriesterase upon N-acyl-L-homoserine Lactone and Paraoxon Binding: Insights from Molecular Dynamics Studies

    Directory of Open Access Journals (Sweden)

    Dongling Zhan

    2013-12-01

    Full Text Available The organophosphorous hydrolase (PTE from Brevundimonas diminuta is capable of degrading extremely toxic organophosphorous compounds with a high catalytic turnover and broad substrate specificity. Although the natural substrate for PTE is unknown, its loop remodeling (loop 7-2/H254R led to the emergence of a homoserine lactonase (HSL activity that is undetectable in PTE (kcat/km values of up to 2 × 104, with only a minor decrease in PTE paraoxonase activity. In this study, homology modeling and molecular dynamics simulations have been undertaken seeking to explain the reason for the substrate specificity for the wild-type and the loop 7-2/H254R variant. The cavity volume estimated results showed that the active pocket of the variant was almost two fold larger than that of the wild-type (WT enzyme. pKa calculations for the enzyme (the WT and the variant showed a significant pKa shift from WT standard values (ΔpKa = 3.5 units for the His254residue (in the Arg254 variant. Molecular dynamics simulations indicated that the displacement of loops 6 and 7 over the active site in loop 7-2/H254R variant is useful for N-acyl-L-homoserine lactone (C4-HSL with a large aliphatic chain to site in the channels easily. Thence the expanding of the active pocket is beneficial to C4-HSL binding and has a little effect on paraoxon binding. Our results provide a new theoretical contribution of loop remodeling to the rapid divergence of new enzyme functions.

  6. Integrity breaches in a hollow fiber nanofilter - Effects on natural organic matter and virus-like particle removal.

    Science.gov (United States)

    Lidén, Angelica; Lavonen, Elin; Persson, Kenneth M; Larson, Magnus

    2016-11-15

    Ultrafiltration and nanofiltration have become common methods to treat surface water for drinking water purposes. Common aims of a membrane step are removal of natural organic matter (NOM), softening or adding an extra microbiological or chemical barrier. In most cases, the membrane is considered a good disinfection step; commonly the viral removal is at least 4-log. To ensure a working disinfection, reliable integrity tests are required. In the present pilot study with a hollow fiber nanofilter, the membrane achieved a high NOM reduction, and the difference in parameters related to NOM quality before and after treatment proved to be useful indicators of integrity breaches. Changes in total organic carbon (TOC) concentration, UV-absorbance at 254 nm (UVA254) and fluorescence derived parameters in the permeate flow were related to leaking fibers. On average, UVA254 in the permeate was 3 times higher for a membrane with compromised fibers (0.041 cm(-1)) compared to an intact membrane (0.013 cm(-1)), while TOC was less than 2 times as high on average. Thus, this membrane had a higher reduction of UVA254 than TOC and the sensitivity for changes from leakage was higher. Therefore, it is suggested that UVA254 could be used as an indicator for membrane integrity. Additionally, there is a significant (P < 0.01) difference in fluorescence derived parameters between a leaking and an intact fiber, showing that fluorescence also has potential to be applied for online monitoring of membrane processes. During fiber failure, around 2% of the permeate flow passes through one single leaking fiber. The transport depends on the distance between the inflow and the leak, which in most cases are similar and most likely close to the middle of the fiber.

  7. A comparative study on the efficiency of ozonation and coagulation-flocculation as pretreatment to activated carbon adsorption of biologically stabilized landfill leachate.

    Science.gov (United States)

    Oloibiri, Violet; Ufomba, Innocent; Chys, Michael; Audenaert, Wim T M; Demeestere, Kristof; Van Hulle, Stijn W H

    2015-09-01

    The present work investigates the potential of coagulation-flocculation and ozonation to pretreat biologically stabilized landfill leachate before granular activated carbon (GAC) adsorption. Both iron (III) chloride (FeCl3) and polyaluminium chloride (PACl) are investigated as coagulants. Better organic matter removal is observed when leachate was treated with FeCl3. At a dose of 1mg FeCl3/mg CODo (CODo: initial COD content), the COD and α254 removal was 66% and 88%, respectively. Dosing 1mg PACl/mg CODo resulted in 44% COD and 72% α254 removal. The settle-ability of sludge generated by PACl leveled off at 252mL/g, while a better settle-ability of 154mL/g was obtained for FeCl3 after dosing 1mg coagulant/mg CODo. For ozonation, the percentage of COD and α254 removal increased as the initial COD concentration decreased. Respectively 44% COD and 77% α254 removal was observed at 112mg COD/L compared to 5% COD and 26% α254 removal at 1846mg COD/L. Subsequent activated carbon adsorption of ozonated, coagulated and untreated leachate resulted in 77%, 53% and 8% total COD removal after treatment of 6 bed volumes. Clearly showing the benefit of treating the leachate before GAC adsorption. Mathematical modeling of the experimental GAC adsorption data with Thomas and Yoon-Nelson models show that ozonation increases the adsorption capacity and breakthrough time of GAC by a factor of 2.5 compared to coagulation-flocculation.

  8. MOLECULAR DETECTION AND CLONING FOR RICKETTSIA-LIKE BACTERIA OF MILKY HAEMOLYMPH DISEASE OF SPINY LOBSTER Panulirus spp.

    Directory of Open Access Journals (Sweden)

    Isti Koesharyani

    2017-01-01

    Full Text Available Spiny lobster (Panulirus homarus and Panulirus ornatus are important commodities for Indonesia. The aquaculture of lobster is susceptible for several diseases like parasite, fungi, bacteria, and virus. Among those diseases, milky haemolymph disease (MHD is often seen as a symptom to mass mortality occurred at lobster farms in Gerupuk Bay of Lombok. The purpose of this study was to determine the lobster diseases on cage culture in Gerupuk Bay of Lombok, West Nusa Tenggara. The study was undertaken from January to March 2015. Diseases status was determined by application of molecular plat-form, polymerase chain reaction (PCR with designation of specific primer for MHD (254F/R, 254F: 5’-CGA-GGA-CCA-GAG-ATG-GAC-CTT-3’ and 254R: 5’-GCT-CAT-TGT-CAC-CGC-CAT-TGT-3’ with PCR size product of 254 bp. and for cloned the pathogen was used TA-cloning Invitrogen for the DNA plasmid as positive control for other analysis. Several tissue samples i.e hepatopancreas, haemolymph, part of muscle hepatopancreas P. homarus and P. ornatus were taken from cage culture farms at Gerupuk Bay then preserved on 90% ethanol for further analysis by PCR and then the amplificated DNA were cloned into pCR®2.1 plasmid and transformed into competent E. coli. The result showed that almost all lobster samples from Gerupuk Bay were positive infected by MHD, as the results of PCR amplification whereas the band appeared at 254bp. Also MHD plasmid has been successfully cloned and will be used for further examination. Histopathologically in hepatopancreas infection have seen necrosis that contain numerous of rickettsia-like bacteria.

  9. Methanocella conradii sp. nov., a thermophilic, obligate hydrogenotrophic methanogen, isolated from Chinese rice field soil.

    Directory of Open Access Journals (Sweden)

    Zhe Lü

    Full Text Available BACKGROUND: Methanocellales contributes significantly to anthropogenic methane emissions that cause global warming, but few pure cultures for Methanocellales are available to permit subsequent laboratory studies (physiology, biochemistry, etc.. METHODOLOGY/PRINCIPAL FINDINGS: By combining anaerobic culture and molecular techniques, a novel thermophilic methanogen, strain HZ254(T was isolated from a Chinese rice field soil located in Hangzhou, China. The phylogenetic analyses of both the 16S rRNA gene and mcrA gene (encoding the α subunit of methyl-coenzyme M reductase confirmed its affiliation with Methanocellales, and Methanocella paludicola SANAE(T was the most closely related species. Cells were non-motile rods, albeit with a flagellum, 1.4-2.8 µm long and by 0.2-0.3 µm in width. They grew at 37-60 °C (optimally at 55 °C and salinity of 0-5 g NaCl l(-1 (optimally at 0-1 g NaCl l(-1. The pH range for growth was 6.4-7.2 (optimum 6.8. Under the optimum growth condition, the doubling time was 6.5-7.8 h, which is the shortest ever observed in Methanocellales. Strain HZ254(T utilized H(2/CO(2 but not formate for growth and methane production. The DNA G+C content of this organism was 52.7 mol%. The sequence identities of 16S rRNA gene and mcrA gene between strain HZ254(T and SANAE(T were 95.0 and 87.5% respectively, and the genome based Average Nucleotide Identity value between them was 74.8%. These two strains differed in phenotypic features with regard to substrate utilization, possession of a flagellum, doubling time (under optimal conditions, NaCl and temperature ranges. Taking account of the phenotypic and phylogenetic characteristics, we propose strain HZ254(T as a representative of a novel species, Methanocella conradii sp. nov. The type strain is HZ254(T ( = CGMCC 1.5162(T = JCM 17849(T = DSM 24694(T. CONCLUSIONS/SIGNIFICANCE: Strain HZ254(T could potentially serve as an excellent laboratory model for studying Methanocellales due to its

  10. On the use of a molten salt fast reactor to apply an idealized transmutation scenario for the nuclear phase out.

    Directory of Open Access Journals (Sweden)

    Bruno Merk

    Full Text Available In the view of transmutation of transuranium (TRU elements, molten salt fast reactors (MSFRs offer certain advantages compared to solid fuelled reactor types like sodium cooled fast reactors (SFRs. In the first part these advantages are discussed in comparison with the SFR technology, and the research challenges are analyzed. In the second part cycle studies for the MSFR are given for different configurations--a core with U-238 fertile, a fertile free core, and a core with Th-232 as fertile material. For all cases, the transmutation potential is determined and efficient transmutation performance for the case with thorium as a fertile material as well as for the fertile free case is demonstrated and the individual advantages are discussed. The time evolution of different important isotopes is analyzed. In the third part a strategy for the optimization of the transmutation efficiency is developed. The final aim is dictated by the phase out decision of the German government, which requests to put the focus on the determination of the maximal transmutation efficiency and on an as much as possible reduced leftover of transuranium elements at the end of the reactor life. This minimal leftover is achieved by a two step procedure of a first transmuter operation phase followed by a second deep burning phase. There the U-233, which is bred in the blanket of the core consisting of thorium containing salt, is used as feed. It is demonstrated, that transmutation rates up to more than 90% can be achieved for all transuranium isotopes, while the production of undesired high elements like californium is very limited. Additionally, the adaptations needed for the simulation of a MSFR, and the used tool HELIOS 1.10 is described.

  11. On the use of a molten salt fast reactor to apply an idealized transmutation scenario for the nuclear phase out.

    Science.gov (United States)

    Merk, Bruno; Rohde, Ulrich; Glivici-Cotruţă, Varvara; Litskevich, Dzianis; Scholl, Susanne

    2014-01-01

    In the view of transmutation of transuranium (TRU) elements, molten salt fast reactors (MSFRs) offer certain advantages compared to solid fuelled reactor types like sodium cooled fast reactors (SFRs). In the first part these advantages are discussed in comparison with the SFR technology, and the research challenges are analyzed. In the second part cycle studies for the MSFR are given for different configurations--a core with U-238 fertile, a fertile free core, and a core with Th-232 as fertile material. For all cases, the transmutation potential is determined and efficient transmutation performance for the case with thorium as a fertile material as well as for the fertile free case is demonstrated and the individual advantages are discussed. The time evolution of different important isotopes is analyzed. In the third part a strategy for the optimization of the transmutation efficiency is developed. The final aim is dictated by the phase out decision of the German government, which requests to put the focus on the determination of the maximal transmutation efficiency and on an as much as possible reduced leftover of transuranium elements at the end of the reactor life. This minimal leftover is achieved by a two step procedure of a first transmuter operation phase followed by a second deep burning phase. There the U-233, which is bred in the blanket of the core consisting of thorium containing salt, is used as feed. It is demonstrated, that transmutation rates up to more than 90% can be achieved for all transuranium isotopes, while the production of undesired high elements like californium is very limited. Additionally, the adaptations needed for the simulation of a MSFR, and the used tool HELIOS 1.10 is described.

  12. On the Use of a Molten Salt Fast Reactor to Apply an Idealized Transmutation Scenario for the Nuclear Phase Out

    Science.gov (United States)

    Merk, Bruno; Rohde, Ulrich; Glivici-Cotruţă, Varvara; Litskevich, Dzianis; Scholl, Susanne

    2014-01-01

    In the view of transmutation of transuranium (TRU) elements, molten salt fast reactors (MSFRs) offer certain advantages compared to solid fuelled reactor types like sodium cooled fast reactors (SFRs). In the first part these advantages are discussed in comparison with the SFR technology, and the research challenges are analyzed. In the second part cycle studies for the MSFR are given for different configurations – a core with U-238 fertile, a fertile free core, and a core with Th-232 as fertile material. For all cases, the transmutation potential is determined and efficient transmutation performance for the case with thorium as a fertile material as well as for the fertile free case is demonstrated and the individual advantages are discussed. The time evolution of different important isotopes is analyzed. In the third part a strategy for the optimization of the transmutation efficiency is developed. The final aim is dictated by the phase out decision of the German government, which requests to put the focus on the determination of the maximal transmutation efficiency and on an as much as possible reduced leftover of transuranium elements at the end of the reactor life. This minimal leftover is achieved by a two step procedure of a first transmuter operation phase followed by a second deep burning phase. There the U-233, which is bred in the blanket of the core consisting of thorium containing salt, is used as feed. It is demonstrated, that transmutation rates up to more than 90% can be achieved for all transuranium isotopes, while the production of undesired high elements like californium is very limited. Additionally, the adaptations needed for the simulation of a MSFR, and the used tool HELIOS 1.10 is described. PMID:24690768

  13. Production of medical radioisotopes in the ORNL high flux isotope reactor (HFIR) for cancer treatment and arterial restenosis therapy after PICA

    Science.gov (United States)

    Knapp, F. F.; Beets, A. L.; Mirzadeh, S.; Alexander, C. W.; Hobbs, R. L.

    1999-01-01

    The High Flux Isotope Reactor ( HFIR) at the Oak Ridge National Laboratory ( ORNL) represents an important resource for the production of a wide variety of medical radioisotopes. First beginning operation in 1965, the high thermal neutron flux (2.5×1015 neutrons/cm2/sec at 85 MW) and versatile target irradiation and handling facilities provide the opportunity for production of a wide variety of neutron-rich medical radioisotopes of current interest for therapy. In addition to serving as a key production site for californium-252 and other transuranic elements, important examples of therapeutic radioisotopes which are currently routinely produced in the HFIR for distribution include dysprosium-166 (parent of holmium-166), rhenium-186, tin-117 m and tungsten-188 (parent of rhenium-188). The nine hydraulic tube ( HT) positions in the central high flux region permit the insertion and removal of targets at any time during the operating cycle (22-24 days) and have traditionally represented a major site for production of medical radioisotopes. To increase the irradiation capabilities of the HFIR, special target holders have recently been designed and fabricated which will be installed in the six Peripheral Target Positions ( PTP), which are also located in the high flux region. These positions are only accessible during reactor refueling and will be used for long-term irradiations, such as required for the production of tin-117 m and tungsten-188. Each of the PTP tubes will be capable of housing a maximum of eight HT targets, thus increasing the total maximum number of HT targets from the current nine, to a total of 57. In this paper the therapeutic use of reactor-produced radioisotopes for bone pain palliation and vascular brachytherapy and the therapeutic medical radioisotope production capabilities of the ORNL HFIR are briefly discussed.

  14. a Theoretical Model of a Superheated Liquid Droplet Neutron Detector.

    Science.gov (United States)

    Harper, Mark Joseph

    from the polyenergetic spectra of bare and moderated californium spontaneous fission sources. The model's predicted response compared favorably with the experimental data.

  15. Blend Down Monitoring System Fissile Mass Flow Monitor Implementation at the ElectroChemical Plant, Zelenogorsk, Russia

    Energy Technology Data Exchange (ETDEWEB)

    Uckan, T.

    2005-11-11

    The implementation plans and preparations for installation of the Fissile Mass Flow Monitor (FMFM) equipment at the ElectroChemical Plant (ECP), Zelenogorsk, Russia, are presented in this report. The FMFM, developed at Oak Ridge National Laboratory, is part of the Blend Down Monitoring System (BDMS), developed for the U.S. Department of Energy Highly Enriched Uranium (HEU) Transparency Implementation Program. The BDMS provides confidence to the United States that the Russian nuclear facilities supplying the lower-assay ({approx}4%) product low enriched uranium (P-LEU) to the United States from down-blended weapons-grade HEU are meeting the nonproliferation goals of the government-to-government HEU Purchase Agreement, signed between the Russian Federation and the United States in 1993. The first BDMS has been operational at Ural Electrochemical Integrated Plant, Novouralsk, since February 1999 and is successfully providing HEU transparency data to the United States. The second BDMS was installed at ECP in February 2003. The FMFM makes use of a set of thermalized californium-252 ({sup 252}Cf) spontaneous neutron sources for a modulated fission activation of the UF{sub 6} gas stream for measuring the {sup 235}U fissile mass flow rate. To do this, the FMFM measures the transport time of the fission fragments created from the fission activation process under the modulated source to the downstream detectors by detecting the delayed gamma rays from the fission fragments. The FMFM provides unattended, nonintrusive measurements of the {sup 235}U mass flow in the HEU, LEU blend stock, and P-LEU process legs. The FMFM also provides the traceability of the HEU flow to the product process leg. This report documents the technical installation requirements and the expected operational characteristics of the ECP FMFM.

  16. Thermal and epithermal neutron fluence rate gradient measurements by PADC detectors in LINAC radiotherapy treatments-field

    Energy Technology Data Exchange (ETDEWEB)

    Barrera, M. T., E-mail: mariate9590@gmail.com; Barros, H.; Pino, F.; Sajo-Bohus, L. [Universidad Simón Bolívar, Nuclear Physics Laboratory, Sartenejas, Caracas (Venezuela, Bolivarian Republic of); Dávila, J. [Física Médica C. A. and Universidad Central de Venezuela, Caracas (Venezuela, Bolivarian Republic of)

    2015-07-23

    LINAC VARIAN 2100 is where energetic electrons produce Bremsstrahlung radiation, with energies above the nucleon binding energy (E≈5.5MeV). This radiation induce (γ,n) and (e,e’n) reactions mainly in the natural tungsten target material (its total photoneutron cross section is about 4000 mb in a energy range from 9-17 MeV). These reactions may occur also in other components of the system (e.g. multi leaf collimator). During radiation treatment the human body may receive an additional dose inside and outside the treated volume produced by the mentioned nuclear reactions. We measured the neutron density at the treatment table using nuclear track detectors (PADC-NTD). These covered by a boron-converter are employed, including a cadmium filter, to determine the ratio between two groups of neutron energy, i.e. thermal and epithermal. The PADC-NTD detectors were exposed to the radiation field at the iso-center during regular operation of the accelerator. Neutron are determined indirectly by the converting reaction {sup 10}B(n,α){sup 7}Li the emerging charged particle leave their kinetic energy in the PADC forming a latent nuclear track, enlarged by chemical etching (6N, NaOH, 70°C). Track density provides information on the neutron density through calibration coefficient (∼1.6 10{sup 4} neutrons /track) obtained by a californium source. We report the estimation of the thermal and epithermal neutron field and its gradient for photoneutrons produced in radiotherapy treatments with 18 MV linear accelerators. It was obsered that photoneutron production have higher rate at the iso-center.

  17. Monte Carlo modeling and analyses of YALINA-booster subcritical assembly part 1: analytical models and main neutronics parameters.

    Energy Technology Data Exchange (ETDEWEB)

    Talamo, A.; Gohar, M. Y. A.; Nuclear Engineering Division

    2008-09-11

    This study was carried out to model and analyze the YALINA-Booster facility, of the Joint Institute for Power and Nuclear Research of Belarus, with the long term objective of advancing the utilization of accelerator driven systems for the incineration of nuclear waste. The YALINA-Booster facility is a subcritical assembly, driven by an external neutron source, which has been constructed to study the neutron physics and to develop and refine methodologies to control the operation of accelerator driven systems. The external neutron source consists of Californium-252 spontaneous fission neutrons, 2.45 MeV neutrons from Deuterium-Deuterium reactions, or 14.1 MeV neutrons from Deuterium-Tritium reactions. In the latter two cases a deuteron beam is used to generate the neutrons. This study is a part of the collaborative activity between Argonne National Laboratory (ANL) of USA and the Joint Institute for Power and Nuclear Research of Belarus. In addition, the International Atomic Energy Agency (IAEA) has a coordinated research project benchmarking and comparing the results of different numerical codes with the experimental data available from the YALINA-Booster facility and ANL has a leading role coordinating the IAEA activity. The YALINA-Booster facility has been modeled according to the benchmark specifications defined for the IAEA activity without any geometrical homogenization using the Monte Carlo codes MONK and MCNP/MCNPX/MCB. The MONK model perfectly matches the MCNP one. The computational analyses have been extended through the MCB code, which is an extension of the MCNP code with burnup capability because of its additional feature for analyzing source driven multiplying assemblies. The main neutronics parameters of the YALINA-Booster facility were calculated using these computer codes with different nuclear data libraries based on ENDF/B-VI-0, -6, JEF-2.2, and JEF-3.1.

  18. Monte Carlo modeling and analyses of YALINA booster subcritical assembly, Part III : low enriched uranium conversion analyses.

    Energy Technology Data Exchange (ETDEWEB)

    Talamo, A.; Gohar, Y. (Nuclear Engineering Division)

    2011-05-12

    This study investigates the performance of the YALINA Booster subcritical assembly, located in Belarus, during operation with high (90%), medium (36%), and low (21%) enriched uranium fuels in the assembly's fast zone. The YALINA Booster is a zero-power, subcritical assembly driven by a conventional neutron generator. It was constructed for the purpose of investigating the static and dynamic neutronics properties of accelerator driven subcritical systems, and to serve as a fast neutron source for investigating the properties of nuclear reactions, in particular transmutation reactions involving minor-actinides. The first part of this study analyzes the assembly's performance with several fuel types. The MCNPX and MONK Monte Carlo codes were used to determine effective and source neutron multiplication factors, effective delayed neutron fraction, prompt neutron lifetime, neutron flux profiles and spectra, and neutron reaction rates produced from the use of three neutron sources: californium, deuterium-deuterium, and deuterium-tritium. In the latter two cases, the external neutron source operates in pulsed mode. The results discussed in the first part of this report show that the use of low enriched fuel in the fast zone of the assembly diminishes neutron multiplication. Therefore, the discussion in the second part of the report focuses on finding alternative fuel loading configurations that enhance neutron multiplication while using low enriched uranium fuel. It was found that arranging the interface absorber between the fast and the thermal zones in a circular rather than a square array is an effective method of operating the YALINA Booster subcritical assembly without downgrading neutron multiplication relative to the original value obtained with the use of the high enriched uranium fuels in the fast zone.

  19. Questions to the radiological protection in the Universidad Nacional Autonoma de Mexico; Cuestionamientos a la proteccion radiologica en la Universidad Nacional Autonoma de Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Salas M, B., E-mail: salasmarb@yahoo.com.mx [UNAM, Facultad de Ciencias, Departamento de Fisica, Circuito exterior s/n, Ciudad Universitaria, 04510 Mexico D. F. (Mexico)

    2014-08-15

    In the Physics Department of the Sciences Faculty of the Universidad Nacional Autonoma de Mexico (UNAM) exist at least 3 sites where radioactive sources and generating equipment s of ionizing radiation are managed: The Modern Physics Laboratory, the Radiological Analysis of Environmental Samples Workshop and the Collisions Workshop; the first of them has two neutron sources, in addition to other emitted sources of gamma and beta radiation. The neutron sources are of Americium 241-Beryllium and other of Californium-252 which have been operated outside of the control of the Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS) that is the regulator organ in Mexico in nuclear matter, because the Operation License No. 183/85, with file number 657 that protected them, lost their validity from August 13, 1987 (25 years behind), what motivated to that the CNSNS assured them. Later to the closing of the Radiological Analysis of Environmental Samples Workshop was believed that a Barium-133 source had been extracted in an illegal way; an investigation realized by the CNSNS determined that the radioactive source was always inside of the detection systems and radiation measurement, for what this source was never lost. In the Collisions Workshop operated an Experimental Accelerator of Particles that the CNSNS prohibited its operation for not having the corresponding license. These examples can be considered as bad practices of radiological protection that should be pointed out to eradicate their promotion and to avoid this way the exposure to the radiation of the occupational exposed personnel and people in general, being also avoided dose of unnecessary radiation. The Instituto Federal de Acceso a la Informacion Publica y Proteccion de Datos (IFAI) in Mexico was a key factor to obtain the information that allowed the realization of this work that was carried out in the Sciences Faculty of the UNAM. (Author)

  20. Charge breeding results and future prospects with electron cyclotron resonance ion source and electron beam ion source (invited).

    Science.gov (United States)

    Vondrasek, R; Levand, A; Pardo, R; Savard, G; Scott, R

    2012-02-01

    The Californium Rare Ion Breeder Upgrade (CARIBU) of the Argonne National Laboratory ATLAS facility will provide low-energy and reaccelerated neutron-rich radioactive beams for the nuclear physics program. A 70 mCi (252)Cf source produces fission fragments which are thermalized and collected by a helium gas catcher into a low-energy particle beam with a charge of 1+ or 2+. An electron cyclotron resonance (ECR) ion source functions as a charge breeder in order to raise the ion charge sufficiently for acceleration in the ATLAS linac. The final CARIBU configuration will utilize a 1 Ci (252)Cf source to produce radioactive beams with intensities up to 10(6) ions∕s for use in the ATLAS facility. The ECR charge breeder has been tested with stable beam injection and has achieved charge breeding efficiencies of 3.6% for (23)Na(8+), 15.6% for (84)Kr(17+), and 13.7% for (85)Rb(19+) with typical breeding times of 10 ms∕charge state. For the first radioactive beams, a charge breeding efficiency of 11.7% has been achieved for (143)Cs(27+) and 14.7% for (143)Ba(27+). The project has been commissioned with a radioactive beam of (143)Ba(27+) accelerated to 6.1 MeV∕u. In order to take advantage of its lower residual contamination, an EBIS charge breeder will replace the ECR charge breeder in the next two years. The advantages and disadvantages of the two techniques are compared taking into account the requirements of the next generation radioactive beam facilities.

  1. Moderator design studies for a new neutron reference source based on the D–T fusion reaction

    Energy Technology Data Exchange (ETDEWEB)

    Mozhayev, Andrey V.; Piper, Roman K.; Rathbone, Bruce A.; McDonald, Joseph C.

    2016-06-01

    The radioactive isotope Californium-252 (252Cf) is relied upon internationally as a neutron calibration source for ionizing radiation dosimetry because of its high specific activity. The source may be placed within a heavy-water (D2O) moderating sphere to produce a softened spectrum representative of neutron fields common to commercial nuclear power plant environments, among others. Due to termination of the U.S. Department of Energy loan/lease program in 2012, the expense of obtaining 252Cf sources has undergone a significant increase, rendering high output sources largely unattainable. On the other hand, the use of neutron generators in research and industry applications has increased dramatically in recent years. Neutron generators based on deuterium-tritium (D-T) fusion reaction provide high neutron fluence rates and, therefore, could possibly be used as a replacement for 252Cf. To be viable, the 14.6 MeV D-T output spectrum must be significantly moderated to approximate common workplace environments. This paper presents the results of an effort to select appropriate moderating materials and design a configuration to reshape the primary neutron field toward a spectrum approaching that from a nuclear power plant workplace. A series of Monte-Carlo (MCNP) simulations of single layer high- and low-Z materials are used to identify initial candidate moderators. Candidates are refined through a similar series of simulations involving combinations of 2 to 5 different materials. The simulated energy distribution using these candidate moderators are rated in comparison to a target spectrum. Other properties, such as fluence preservation and/or enhancement, prompt gamma production and other characteristics are also considered.

  2. Thermal Neutron Imaging Using A New Pad-Based Position Sensitive Neutron Detector

    Energy Technology Data Exchange (ETDEWEB)

    Dioszegi I.; Vanier P.E.; Salwen C.; Chichester D.L.; Watson S.M.

    2016-10-29

    Thermal neutrons (with mean energy of 25 meV) have a scattering mean free path of about 20 m in air. Therefore it is feasible to find localized thermal neutron sources up to ~30 m standoff distance using thermal neutron imaging. Coded aperture thermal neutron imaging was developed in our laboratory in the nineties, using He-3 filled wire chambers. Recently a new generation of coded-aperture neutron imagers has been developed. In the new design the ionization chamber has anode and cathode planes, where the anode is composed of an array of individual pads. The charge is collected on each of the individual 5x5 mm2 anode pads, (48x48 in total, corresponding to 24x24 cm2 sensitive area) and read out by application specific integrated circuits (ASICs). The high sensitivity of the ASICs allows unity gain operation mode. The new design has several advantages for field deployable imaging applications, compared to the previous generation of wire-grid based neutron detectors. Among these are the rugged design, lighter weight and use of non-flammable stopping gas. For standoff localization of thermalized neutron sources a low resolution (11x11 pixel) coded aperture mask has been fabricated. Using the new larger area detector and the coarse resolution mask we performed several standoff experiments using moderated californium and plutonium sources at Idaho National Laboratory. In this paper we will report on the development and performance of the new pad-based neutron camera, and present long range coded-aperture images of various thermalized neutron sources.

  3. Chemical properties of the heavier actinides and transactinides

    Energy Technology Data Exchange (ETDEWEB)

    Hulet, E.K.

    1981-01-01

    The chemical properties of each of the elements 99 (Es) through 105 are reviewed and their properties correlated with the electronic structure expected for 5f and 6d elements. A major feature of the heavier actinides, which differentiates them from the comparable lanthanides, is the increasing stability of the divalent oxidation state with increasing atomic number. The divalent oxidation state first becomes observable in the anhydrous halides of californium and increases in stability through the series to nobelium, where this valency becomes predominant in aqueous solution. In comparison with the analogous 4f electrons, the 5f electrons in the latter part of the series are more tightly bound. Thus, there is a lowering of the 5f energy levels with respect to the Fermi level as the atomic number increases. The metallic state of the heavier actinides has not been investigated except from the viewpoint of the relative volatility among members of the series. In aqueous solutions, ions of these elements behave as a normal trivalent actinides and lanthanides (except for nobelium). Their ionic radii decrease with increasing nuclear charge which is moderated because of increased screening of the outer 6p electrons by the 5f electrons. The actinide series of elements is completed with the element lawrencium (Lr) in which the electronic configuration is 5f/sup 14/7s/sup 2/7p. From Mendeleev's periodicity and Dirac-Fock calculations, the next group of elements is expected to be a d-transition series corresponding to the elements Hf through Hg. The chemical properties of elements 104 and 105 only have been studied and they indeed appear to show the properties expected of eka-Hf and eka-Ta. However, their nuclear lifetimes are so short and so few atoms can be produced that a rich variety of chemical information is probably unobtainable.

  4. Fabrication of uranium-based ceramics using internal gelation for the conversion of trivalent actinides; Herstellung uranbasierter Keramiken mittel interner Gelierung zur Konversion trivalenter Actinoiden

    Energy Technology Data Exchange (ETDEWEB)

    Daniels, Henrik

    2012-07-01

    Alternative to today's direct final waste disposal strategy of long-lived radionuclides, for example the minor actinides neptunium, americium, curium and californium, is their selective separation from the radioactive wastestream with subsequent transmutation by neutron irradiation. Hereby it is possible to obtain nuclides with a lower risk-potential concerning their radiotoxicity. 1 neutron irradiation can be carried out either with neutron sources or in the next generation of nuclear reactors. Before the treatment, the minor actinides need to be converted in a suitable chemical and physical form. Internal gelation offers a route through which amorphous gel-spheres can be obtained directly from a metal-salt solution. Due to the presence of different types of metal ions as well as changing pH-values in a stock solution, a complex hydrolysis behaviour of these elements before and during gelation occurs. Therefore, investigations with uranium and neodymium as a minor actinide surrogate were carried out. As a result of suitable gelation-parameters, uraniumneodymium gel-spheres were successfully synthesised. The spheres also stayed intact during the subsequent thermal treatment. Based upon these findings, uranium-plutonium and uranium-americium gels were successfully created. For theses systems, the determined parameters for the uraniumneodymium gelation could also be applied. Additionally, investigations to reduce the acidity of uranium-based stock solutions for internal gelation were carried out. The necessary amount of urea and hexamethylenetetramine to induce gelation could hereby be decreased. This lead to a general increase of the gel quality and made it possible to carry out uranium-americium gelation in the first place. To investigate the stability of urea and hexamethylenetetramine, solutions of these chemicals were irradiated with different radiation doses. These chemicals showed a high stability against radiolysis in aqueous solutions.

  5. Two low-level gamma spectrometry systems of the IAEA Safeguards Analytical Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Parus, J.L. [IAEA, SAL, Vienna (Austria); Raab, W. [IAEA, SAL, Vienna (Austria); Donohue, D. [IAEA, SAL, Vienna (Austria); Jansta, V. [IAEA, SAL, Vienna (Austria); Kierzek, J. [IAEA, SAL, Vienna (Austria)

    1997-03-01

    A gamma spectrometry system designed for the measurement of samples with low and medium radioactivity (activity from a few to about 10{sup 4} Bq in the energy range from 25 to 2700 keV) has been installed at the IAEA Safeguards Analytical Laboratory in Seibersdorf. The system consists of 3 low level detectors: (1) n-type coaxial Ge with 42.4% relative efficiency, 1.85 keV FWHM at 1.33 MeV (2) planar Ge with 2000 mm{sup 2} area and 20 mm thickness, 562 eV FWHM at 122 keV (3) NaI(Tl) annulus of 25.4 cm diameter and 25.4 cm height, hole diameter 90 mm. (orig./DG)

  6. Photocatalytic study of organosilane-modified zinc oxide nanoparticles

    Directory of Open Access Journals (Sweden)

    Tăbăcaru Aurel

    2015-12-01

    Full Text Available In our recent studies, we have investigated the tunability of optical properties of zinc oxide nanoparticles (ZnO NPs through surface modification with organosilane surfactants. In the present paper, the effect of ZnO NPs modified with variable amount of 3-(trimethoxysilylpropylmethacrylate (MPS surfactant was investigated toward the photocatalytic degradation of methylene blue (MB, using two different UV light sources emitting at 254 nm and 365 nm. While the maximum photodegradation efficiency of 63% was reached by ZnO NPs loaded with the highest concentration of MPS upon exposure at 254 nm, in the case of UV exposure at 365 nm an opposite photodegradation trend was observed. Actually, a significant photodegradation efficiency of 95% was recorded by the unmodified ZnO, followed by ZnO NPs modified with 2% MPS for which the photodegradation efficiency amounted to 80%, thus highlighting their best photocatalytic performance.

  7. Qualitative analysis of Cu2+, Co2+, and Ni2+ cations using thin-layer chromatography.

    Science.gov (United States)

    Ergül, Soner

    2004-03-01

    The M(DEDTC)2 (M = Cu, Co, or Ni) and M(PyDTC)2 (M = Cu or Co) complexes prepared by reactions of sodium diethyldithiocarbamate and ammonium pyrollidinedithiocarbamate with metal (II) nitrates are examined for qualitative analysis and separation using thin-layer chromatography systems. These complexes and their mixtures are spotted to the activated thin layers of silica gel 60GF254 (Si-60GF254) with a 250-microm thickness. Pure toluene and a toluene-cyclohexane mixture (3:1, v/v) are used as mobile phases for running of the complexes. These chromatographic systems are successfully used for qualitative analysis of corresponding metal cations and separation of components in both M(DEDTC)2 and M(PyDTC)2 complex mixtures.

  8. DERIVATIZED HPTLC METHOD FOR SIMULTANEOUS ESTIMATION OF GLUCOSAMINE AND IBUPROFEN IN TABLETS

    Directory of Open Access Journals (Sweden)

    SAM SOLOMON, RAHUL. KUMAR,VIJAI ANAND, SIVAKUMAR, VENKATNARAYANAN

    2013-09-01

    Full Text Available A selective, precise and derivatized HPTLC method has been developed for the simultaneous estimation of Glucosamine and Ibuprofen in tablet formulation. In this method standard and sample solutions of Glucosamine and Ibuprofen were applied on pre-coated silica gel 60F254 TLC plate, and developed using Propanol-Ethyl acetate-Ammonia-Water (4: 3: 2: 1 v/v, as mobile phase and derivatized using Iodine vapor. The drugs on the plate were scanned at 254 nm. The dynamic linearity range was 5-25 μg/spot for Glucosamine and 2-10 μg/spot for Ibuprofen. The method was validated for precision, recovery and reproducibility

  9. Damage detection in composite materials using PZT actuators and sensors for structural health monitoring

    Science.gov (United States)

    Spiegel, Michelle DuBose

    Structural Health Monitoring (SHM) of bridges, buildings, aircrafts, and spacecraft using a network of sensors has gained popularity over recent years. In this thesis, the use of piezoelectric actuators and sensors is described for detecting damage in a composite panel. The composite panels are fabricated using the Vacuum Assisted Resin Transfer Molding (VARTM) process. The panels are cut into small coupons (254 mm x 25.4 mm) to test various properties of the composite. A piezoelectric actuator is surface mounted on the composite coupon to generate Lamb waves while a surface mounted piezoelectric sensor measures the response. Data is collected from an undamaged composite coupon, and then the process is repeated for a damaged coupon. The existing damage is quantified by comparing the response of the damaged and undamaged composite coupons.

  10. Removal of dissolved organic nitrogen in the secondary effluent by integrated ozone/activated carbon%臭氧/活性炭协同作用去除二级出水中DON

    Institute of Scientific and Technical Information of China (English)

    刘冰; 古励; 余国忠; 翟慧敏; 赵承美

    2014-01-01

    为探讨臭氧氧化和活性炭吸附对城市污水厂二级出水中溶解性有机氮(DON)的去除机制,首先测定二级出水 DON、溶解性有机炭(DOC)、UV254、pH值等指标.接着通过臭氧氧化试验和活性炭吸附试验来考察二级出水中DON、DOC和UV254变化,以及DON分子量分布和DON亲疏水性变化,并应用三维荧光光谱对二级出水中DON变化进行表征.结果表明,当臭氧投加量为8mg/L,DON的去除率大约为33.9%,DOC和UV254去除率约21.2%、66.7%;当活性炭投加量为2.0g/L,DON、DOC和UV254的去除率大约为43.4%、27.6%、92.2%;臭氧氧化和活性炭吸附组合试验时,对DON的去除率大约为83.3%和81.5%;臭氧氧化提高小分子量(20kDa)的DON所占比例;活性炭吸附降低小分子量(20kDa)DON所占比例为;臭氧氧化和活性炭吸附都提高亲水性DON所占比例,而降低疏水性和过渡性DON所占比例;三维荧光光谱证实,二级出水中DON变化与3个主要峰有关,分别代表物质为色氨酸类蛋白质、芳香族类蛋白质和富里酸类物质.%The mechanism of DON removal in the secondary effluent by ozonation and adsorption was investigated in this study. The water quality parameters, such as DON, DOC, NH4+-N, UV254 and pH etc, were determined. The variation in DON, DOC andUV254 in ozonation and adsorption tests measured, and the molecular weight distribution, hydrophilicity and hydrophobicity of the DON were then analyzed. The changes of DON in the secondary effluent were characterized using three-dimensional fluorescence spectroscopy. The results showed the removal of DON, DOC andUV254 were about 33.9%, 21.2% and 66.7%, respectively, at ozonation test and the dosage of ozone was 8mg/L. The removal of DON, DOC and UV254 were about 43.4%, 27.6% and 92.2% at the activated carbon dosage of 2.0g/L. By the combination of ozonation and adsorption the removal of DON was approximately 83.3% and 81.5%. Ozonation and acitivated carbon

  11. Upper limits for the rate constants of the reactions of CF3O2 and CF3O radicals with ozone at 295 K

    DEFF Research Database (Denmark)

    Nielsen, O.J.; Sehested, J.

    1993-01-01

    Using the pulse radiolysis UV absorption technique and subsequent simulations of experimental absorption transients at 254 and 276 nm, upper limits of the rate constants for the reactions of CF3O2 and CF3O radicals with ozone were determined at 295 K, CF3O2+O3-->CF3O+2O2 (4), CF3O+O3-->CF3O2+O2 (......). The upper limits were derived as k4 ozone depletion by hydrofluorocarbons.......Using the pulse radiolysis UV absorption technique and subsequent simulations of experimental absorption transients at 254 and 276 nm, upper limits of the rate constants for the reactions of CF3O2 and CF3O radicals with ozone were determined at 295 K, CF3O2+O3-->CF3O+2O2 (4), CF3O+O3-->CF3O2+O2 (5...

  12. Photochemical degradation of environmentally persistent perfluorooctanoic acid (PFOA) in the presence of Fe(III)

    Institute of Scientific and Technical Information of China (English)

    Yuan Wang; Peng Yi Zhang; Gang Pan; Hao Chen

    2008-01-01

    Environmentally persistent and bioaccumulative perfluorooctanic acid (PFOA) was difficult to be decomposed under the irradiation of 254 nm UV light. However, in the presence of 80μmol /L Fe(III), 80% of PFOA with initial concentration of 48μmol/L (20 mg/L) was effectively degraded and 47.8% of fluorine atoms in PFOA molecule were transformed into inorganic fluoride ion after 4 h reaction. Shorter chain perfluorocarboxylic acids bearing C3-C7 and fluoride ion were detected and identified by LC/MS and IC as the degradation products in the aqueous solution. It was proposed that complexes of PFOA with Fe(III) initiated degradation of PFOA irradiated with 254 nm UV light.

  13. An X-Band Waveguide Measurement Technique for the Accurate Characterization of Materials with Low Dielectric Loss Permittivity

    CERN Document Server

    Allen, Kenneth W; Reid, David R; Bean, Jeffrey A; Ellis, Jeremy D; Morris, Andrew P; Marsh, Jeramy M

    2016-01-01

    In this work, we present a new X-band waveguide (WR90) measurement method that permits the broadband characterization of the complex permittivity for low dielectric loss tangent material specimens with improved accuracy. An electrically-long polypropylene specimen that partially fills the cross-section is inserted into the waveguide and the transmitted scattering parameter (S21) is measured. The extraction method relies on computational electromagnetic simulations, coupled with a genetic algorithm, to match the experimental S21 measurement. The sensitivity of the technique to sample length was explored by simulating specimen lengths from 2.54 to 15.24 cm, in 2.54 cm increments. Analysis of our simulated data predicts the technique will have the sensitivity to measure loss tangent values on the order of 10e-3 for materials such as polymers with relatively low real permittivity values. The ability to accurately characterize low-loss dielectric material specimens of polypropylene is demonstrated experimentally. ...

  14. AcEST: BP915505 [AcEST

    Lifescience Database Archive (English)

    Full Text Available kinase, putative... 33 7.8 tr|A0E4R7|A0E4R7_PARTE Chromosome undetermined scaffo...ld_78, whol... 33 7.8 tr|A0CRY6|A0CRY6_PARTE Chromosome undetermined scaffold_254, who... 33 7.8 tr|A0C7A8|A...WECDETGICLSCKSGY 645 >tr|A0E4R7|A0E4R7_PARTE Chromosome undetermined scaffold_78, whole genome shotgun seque...CLSCFES---EQLRILTTNQCIC 1482 >tr|A0CRY6|A0CRY6_PARTE Chromosome undetermined scaffold_254, whole genome shot...7A8|A0C7A8_PARTE Chromosome undetermined scaffold_154, whole genome shotgun sequence OS=Paramecium tetraurel

  15. Surrogates for herbicide removal in stormwater biofilters.

    Science.gov (United States)

    Zhang, Kefeng; Deletic, Ana; Page, Declan; McCarthy, David T

    2015-09-15

    Real time monitoring of suitable surrogate parameters are critical to the validation of any water treatment processes, and is of particularly high importance for validation of natural stormwater treatment systems. In this study, potential surrogates for herbicide removal in stormwater biofilters (also known as stormwater bio-retention or rain-gardens) were assessed using field challenge tests and matched laboratory column experiments. Differential UV absorbance at 254mn (ΔUVA254), total phosphorus (ΔTP), dissolved phosphorus (ΔDP), total nitrogen (ΔTN), ammonia (ΔNH3), nitrate and nitrite (ΔNO3+NO2), dissolved organic carbon (ΔDOC) and total suspended solids (ΔTSS) were compared with glyphosate, atrazine, simazine and prometryn removal rates. The influence of different challenge conditions on the performance of each surrogate was studied. Differential TP was significantly and linearly related to glyphosate reduction (R(2) = 0.75-0.98, P biofilters.

  16. Effect of TIT-twins Vaccine on Grazing Sheep in High-cold Area%高寒地区放牧绵羊应用TIT-双胎苗效果试验

    Institute of Scientific and Technical Information of China (English)

    李成魁; 保善科; 孔祥颖; 李茂卓玛

    2004-01-01

    利用中国农科院兰州畜牧所研制生产的TIT-双胎苗应用于青海省海北州绵羊生产中,共选择供试母羊254只,产双羔68对,对照组母羊388只,无一只母羊产双羔,68只产双羔的试验母羊,在断奶时繁活94只羔羊,比产单羔多繁活45只羔羊,254只试验羊净增加收益4 892元,经济效益显著.

  17. INFLUENCE OF ULTRAVIOLET RADIATION ON MICROBIOLOGICAL AND SENSORY CHARACTERISTICS OF CERTAIN CATEGORIES OF VEGETABLES PRODUCTS AND THEIR PRESERVATION LIFE

    Directory of Open Access Journals (Sweden)

    Danilevici Constantin

    2010-01-01

    Full Text Available Research paper aims to highlight the scientific correlation between the influence of ultraviolet radiation (UV onsensory and microbiological characteristics of plant products in the category of leaves (lettuce and other types ofvegetables or fruit (bananas and their preservation’s duration, through their UV irradiation under certain conditions.The literature indicates a germicidal action of UV (medium UV on micro-organisms, optimal for λ = 254 nm. Theeffectiveness of radiation is influenced by duration of irradiation, the distance between the radiation source and thesample product and radiant power source.The action of microbial cell inactivation or destruction can be explained by changes in cellular structure andpermeability with changes at the level of mitochondria and the genetic material as a result of photochemical effects ofUV products. Research highlights the preservative effect of UV radiation (with λ = 254 nm and also their influence onsensory properties and positive to negative for leafy vegetables and fruits (bananas in our case.

  18. 单酵母发酵与多酵母共酵对宝石一卡本内特红葡萄酒品质的影响初报

    Institute of Scientific and Technical Information of China (English)

    于清琴; 李保国; 张颖超; 史红梅; 毕春元

    2009-01-01

    以宝石一卡本内特(Ruby Cabemat)为原料,在酿造过程中采用D254酵母单独发酵、D254和产酯酵母混合发酵的方法酿造干红葡萄酒,检测其主要理化指标,并进行感官质量比较。结果表明,混合酵母发酵的葡萄酒在产酯率和感官品质上均优于单酵母发酵,产品呈深宝石红色,酒香浓郁,酒体丰满。

  19. Relative efficiencies of three ultraviolet radiation wavelengths for cell killing and transformation in mouse cells in vitro.

    Science.gov (United States)

    Papadopoulo, D; Muel, B; Latarjet, R

    1983-09-01

    C3H 10 T 1/2 clone 8 mouse cells were irradiated in vitro with three U.V. wavelengths 280, 254, and 230 nm. Two effects were investigated, survival and malignant transformation, and the relative efficiencies were determined for the three radiations. For transformation, these efficiencies were: 280nm:3.9; 254nm:5.1; 230nm:2.3 (transformations produced by 5 Jm-2 of U.V. for 1000 surviving cells). For cell killing the efficiencies were, in relative units, 34, 100, and 50 respectively. These efficiencies are in agreement with the hypothesis that the main chromophore for both effects is the nucleic acid, and not the protein moiety of the genome. This conclusion agrees with that previously reached by other investigators, but our present results obtained with the short wave-length 230 nm provide an especially strong new argument.

  20. Reduction of Precursors of Chlorination By-products in Drinking Water Using Fluidized-bed Biofilm Reactor at Low Temperature

    Institute of Scientific and Technical Information of China (English)

    SHU-GUANG XIE; DONG-HUI WEN; DONG-WEN SHI; XIAO-YAN TANG

    2006-01-01

    Objective To investigate the reduction of chlorination by-products (CBPs) precursors using the fluidized-bed biofilm reactor (FBBR). Methods Reduction of total organic carbon (TOC), ultraviolet absorbance (UV254), trihalomethane (THM)formation potential (THMFP), haloacetic acid (HAA) formation potential (HAAFP), and ammonia in FBBR were evaluated in detail. Results The reduction of TOC or UV254 was low, on average 12.6% and 4.7%, respectively, while the reduction of THMFP and HAAFP was significant. The reduction of ammonia was 30%-40% even below 3℃, however, it could quickly rise to over 50% above 3℃. Conclusions The FBBR effectively reduces CBPs and ammonia in drinking water even at low temperature and seems to be a very promising and competitive drinking water reactor for polluted surface source waters, especially in China.