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Sample records for zhe ljubit shtob

  1. Crystallization and preliminary X-ray analysis of ZHE1, a hatching enzyme from the zebrafish Danio rerio

    International Nuclear Information System (INIS)

    Okada, Akitoshi; Nagata, Koji; Sano, Kaori; Yasumasu, Shigeki; Kubota, Keiko; Ohtsuka, Jun; Iuchi, Ichiro; Tanokura, Masaru

    2009-01-01

    The hatching enzyme of zebrafish, ZHE1, was expressed, purified and crystallized using the hanging-drop vapour-diffusion method. The crystal belonged to space group P2 1 2 1 2 1 and diffracted X-rays to a resolution of 1.14 Å. The hatching enzyme of the zebrafish, ZHE1 (29.3 kDa), is a zinc metalloprotease that catalyzes digestion of the egg envelope (chorion). ZHE1 was heterologously expressed in Escherichia coli, purified and crystallized by the hanging-drop vapour-diffusion method using PEG 3350 as the precipitant. Two diffraction data sets with resolution ranges 50.0–1.80 and 50.0–1.14 Å were independently collected from two crystals and were merged to give a highly complete data set over the full resolution range 50.0–1.14 Å. The space group was assigned as primitive orthorhombic P2 1 2 1 2 1 , with unit-cell parameters a = 32.9, b = 62.5, c = 87.4 Å. The crystal contained one ZHE1 molecule in the asymmetric unit

  2. ZHE: [Noun] Undefined--An Interview with Performers Antonia Kemi Coker and Tonderai Munyevu

    Science.gov (United States)

    Shaskan, Victoria

    2013-01-01

    In February 2012, London-based theatre company Collective Artistes previewed "ZHE: [noun] Undefined," a new play created by director Chuck Mike and performers Tonderai Munyevu and Antonia Kemi Coker. The play follows the true life stories of the two performers, both British Africans, living at the intersections of culture, nationality, gender and…

  3. [Distribution Characteristics of Sedimentary Pigments in the Changjiang Estuary and Zhe-Min Coast and its Implications].

    Science.gov (United States)

    Li, Dong; Yao, Peng; Zhao, Bin; Wang, Jin-peng; Pan, Hui-hui

    2015-08-01

    Compositions and contents of sedimentary pigments were examined using high performance liquid chromatography in order to discuss the spatial distributions of phytoplankton primary production, phytoplankton functional type and the preservation efficiency of phytoplankton pigments and their influencing factors. The results showed that: chloropigments [Chlorins, including chlorophyll-a (Chl-a) and pheopigments (Pheo-a), such as pheophytin-a (PHtin-a), pheophorbide-a (PHide-a), pPheophytin-a (pPHtin-a), sterol chlorin esters (SCEs) and carotenol chlorin esters (CCEs)] were the major type of sedimentary pigments. The nutrients inputs from Changjiang Diluted Water and upwelling in the Zhe-Min coastal mud area were the major cause for the patchy distribution with high sedimentary chloropigment contents. Carotenoid contents showed no trending changes and exhibited high values in the Changjiang Estuary and Zhe-Min Coasts. Based on the relative proportions of each diagnostic carotenoid to the total diagnostic carotenoids in the sediments, the relative contributions of diatoms, dinoflagellates, prymnesiophytes, prasinophytes, cryptophytes and cyanobacterias in the phytoplankton fuctional types were 48.8% +/- 17.4%, 10.7% +/- 11.5%, 8.1% +/- 7.2%, 18.6% +/- 8.2%, 9.4% +/- 6.4% and 4.3% +/- 3.2%, respectively. The preference for external environmental conditions (e.g., nutrient level and water salinity) was the main cause for the decreasing trends of diatoms and dinoflagellates proportions and the increasing trends of prasinophytes, cryptophytes and cyanobacterias seawards. Based on the spatial distribution of Chl-a/Pheo-a ratios, the higher preservation efficiencies of sedimentary pigments in the coastal regions (e.g., outer edge of maximum turbidity zone in the Changjiang Estuary, mouth of the Hangzhou Bay and upwelling region in the Zhe-Min Coast) were mainly due to the higher sedimentation rate and seasonal occurrences of hypoxia in bottom water, and these regions with

  4. Svetlan Semenenko iz novõh stihov : [stihi] / Svetlan Semenenko

    Index Scriptorium Estoniae

    Semenenko, Svetlan, 1938-2007

    1997-01-01

    Sisu : Beshenõi ogurets; 'Blagodarju, dorogaja moja model...'; 'Ne ljubite menja...'; Teatralnoje; Dva portreta s damoi; Oleg Oppengeim, Jan Stroselski; Putnik : Ljubamiru malinke; 'Kak horosho - taitsja...'

  5. Ih ljubit Fashion TV / Alina Zelimhanova

    Index Scriptorium Estoniae

    Zelimhanova, Alina

    2002-01-01

    Tutvustatakse uue põlvkonna supermodelle: Anouck Lepere (belgia), Caroline Ribeiro (brasiilia), Maria Carla Boscono (itaalia), Liya Kebede (etioopia), Jacquetta Wheeler (inglise), Karolina Kurkova (tšehhi), Natalja Vodjanova (vene), Alek Wek (sudaani), Hannelore Knuts (belgia). Lisatud fotod

  6. Rates and fluxes of centennial-scale carbon storage in the fine-grained sediments from the central South Yellow Sea and Min-Zhe belt, East China Sea

    Science.gov (United States)

    Wang, Jianghai; Xiao, Xi; Zhou, Qianzhi; Xu, Xiaoming; Zhang, Chenxi; Liu, Jinzhong; Yuan, Dongliang

    2018-01-01

    The global carbon cycle has played a key role in mitigating global warming and climate change. Long-term natural and anthropogenic processes influence the composition, sources, burial rates, and fluxes of carbon in sediments on the continental shelf of China. In this study, the rates, fluxes, and amounts of carbon storage at the centennial scale were estimated and demonstrated using the case study of three fine-grained sediment cores from the central South Yellow Sea area (SYSA) and Min-Zhe belt (MZB), East China Sea. Based on the high-resolution temporal sequences of total carbon (TC) and total organic carbon (TOC) contents, we reconstructed the annual variations of historical marine carbon storage, and explored the influence of terrestrial and marine sources on carbon burial at the centennial scale. The estimated TC storage over 100 years was 1.18×108 t in the SYSA and 1.45×109 t in the MZB. The corrected TOC storage fluxes at the centennial scale ranged from 17 to 28 t/(km2·a)in the SYSA and from 56 to 148 t/(km2·a) in the MZB. The decrease of terrestrial materials and the increase of marine primary production suggest that the TOC buried in the sediments in the SYSA and MZB was mainly derived from the marine autogenetic source. In the MZB, two depletion events occurred in TC and TOC storage from 1985 to 1987 and 2003 to 2006, which were coeval with the water impoundment in the Gezhouba and Three Gorges dams, respectively. The high-resolution records of the carbon storage rates and fluxes in the SYSA and MZB reflect the synchronous responses to human activities and provide an important reference for assessing the carbon sequestration capacity of the marginal seas of China.

  7. Iz perevodov : [tõlkevalimik] / Svetlan Semenenko

    Index Scriptorium Estoniae

    Semenenko, Svetlan, 1938-2007

    1998-01-01

    Sisu: Traat, Mats. Samoje lutshsheje vremja; Suuman, Aleksander. 'Voronu ne popast domoi...'; Viiding, Juhan. 'Vo sadu vo zeljonom...'; Kurg, Kalle. 'I zdes to Zhe samoje zdes to zhe samoje...'; Rummo, Paul-Eerik. Uteshenje; Nitshja; Alver, Betti. Mezhdu Jõgeva i Pedja : iz poemõ; S dikim krikom

  8. Physiological responses and tolerance of kenaf (Hibiscus cannabinus L.) exposed to chromium.

    Science.gov (United States)

    Ding, Han; Wang, Guodong; Lou, Lili; Lv, Jinyin

    2016-11-01

    Selection of kenaf species with chromium (Cr) tolerance and exploring the physiological mechanisms involved in Cr tolerance are crucial for application of these species to phyto-remediation. In the present study, a hydroponic experiment was conducted to investigate the variation in two kenaf cultivars, K39-2 and Zhe50-3 under Cr stress. At the same Cr concentration, the tolerance index (TI) of K39-2 was higher than that of Zhe50-3, indicating that K39-2 may be more tolerant to Cr than Zhe50-3. It was also observed that high concentration of chromium was accumulated both in the shoots and the roots of Hibiscus cannabinus L. The leaves of K39-2 accumulated 4760.28mgkg(-1) of dry weight under 1.50mM Cr stress, and the roots accumulated 11,958.33mgkg(-1). Physiological response shows that the antioxidant enzymes' superoxide dismutase (SOD), catalase activity (CAT) and peroxidase (POD) activities increased in the leaves and decreased in roots of the Cr-stressed plants nearly compared to the control. Moreover, the variation of antioxidant enzymes activities indicated Zhe50-3 was more vulnerable than K39-2, and the contents of the non-protein thiol pool (GSH, NPT and PCs) were higher in K39-2 than Zhe50-3 with the increased Cr concentration. Based on the observations above, it can be concluded that the well-coordinated physiological changes confer a greater Cr tolerance to K39-2 than Zhe50-3 under Cr exposure, and Hibiscus cannabinus L. has a great accumulation capacity for chromium. Copyright © 2016 Elsevier Inc. All rights reserved.

  9. Ballistic Phosphorene Transistor

    Science.gov (United States)

    2015-11-19

    IEEE Electron Devices Letters 35 (7): 795-797, 2014. 2. Yexin Deng, Zhe Luo, Nathan J. Conrad, Han Liu, Yongji Gong, Sina Najmaei, Pulickel M...IEEE Electron Devices Letters 35 (7): 795-797, 2014. 2. Yexin Deng, Zhe Luo, Nathan J. Conrad, Han Liu, Yongji Gong, Sina Najmaei, Pulickel M

  10. Deformation styles and exhumation patterns in the Northern Iranian Plateau: New results from integrated balanced cross sections and low-temperature thermochronology (AHe and ZHe)

    Science.gov (United States)

    Balling, Philipp; Ballato, Paolo; Dunkl, István; Zeillinger, Gerold; Heidarzadeh, Ghasem; Ghasemi, Mohammad; Strecker, Manfred R.

    2014-05-01

    The Iranian Plateau is situated in the collision zone between the Arabian and Eurasian plates and forms a NW-SE elongated, 40- to 50-km-thick crustal block, delimited to the north by the Urmieh Dokhtar Volcanic Zone and to south by the High Zagros Mountains. The plateau is characterized by a series of basins and mountain ranges bounded by reverse and transpressive faults. These mountain ranges reflect a history of strong collisional deformation, with intensely faulted and folded Pre-Cambrian (basement) to Miocene (terrestrial sediments of the Upper Red Formation) rocks. Based on the structural evolution, high mean elevation of 2 km, and a crustal thickness of up to 56 km, the realm of the present-day plateau must have absorbed a significant fraction of past plate convergence between Eurasia and Arabia. However, according to seismic and GPS data active deformation is rather limited. In addition, the exact timing and style of deformation, the extent of crustal shortening and thickening on the northern Iranian Plateau during continental collision remain unclear. To address these issues we collected structural data and modeled deformation scenarios cross four mountain ranges that constitute the northern margin of the Iranian Plateau (NW Iran). The Tarom, Mah Neshan and Sultanije mountain ranges are NW-SE oriented, while the northernmost (Bozgosh) is E-W aligned. Due to the lack of subsurface data, several forward and backward models were generated with MOVE (Midland Valley, structural modelling software). The model with the simplest and most robust geological explanation of the field data was chosen. In addition, we combined our structural work with an apatite (U-Th)/He study (AHe) along two transects (Bozgosh, Mah Neshan) and Zircon (U-Th)/He data (ZHe) on higher exhumed locations. In the northern sector of the plateau late Cretaceous (or Paleocene?) rocks had been deposited unconformably onto older, deformed rocks. This suggests that the Arabia-Eurasia collision was

  11. Enabling the intestinal absorption of highly polar antiviral agents: ion-pair facilitated membrane permeation of zanamivir heptyl ester and guanidino oseltamivir.

    Science.gov (United States)

    Miller, Jonathan M; Dahan, Arik; Gupta, Deepak; Varghese, Sheeba; Amidon, Gordon L

    2010-08-02

    Antiviral drugs often suffer from poor intestinal permeability, preventing their delivery via the oral route. The goal of this work was to enhance the intestinal absorption of the low-permeability antiviral agents zanamivir heptyl ester (ZHE) and guanidino oseltamivir (GO) utilizing an ion-pairing approach, as a critical step toward making them oral drugs. The counterion 1-hydroxy-2-naphthoic acid (HNAP) was utilized to enhance the lipophilicity and permeability of the highly polar drugs. HNAP substantially increased the log P of the drugs by up to 3.7 log units. Binding constants (K(11(aq))) of 388 M(-1) for ZHE-HNAP and 2.91 M(-1) for GO-HNAP were obtained by applying a quasi-equilibrium transport model to double-reciprocal plots of apparent octanol-buffer distribution coefficients versus HNAP concentration. HNAP enhanced the apparent permeability (P(app)) of both compounds across Caco-2 cell monolayers in a concentration-dependent manner, as substantial P(app) (0.8-3.0 x 10(-6) cm/s) was observed in the presence of 6-24 mM HNAP, whereas no detectable transport was observed without counterion. Consistent with a quasi-equilibrium transport model, a linear relationship with slope near 1 was obtained from a log-log plot of Caco-2 P(app) versus HNAP concentration, supporting the ion-pair mechanism behind the permeability enhancement. In the rat jejunal perfusion assay, the addition of HNAP failed to increase the effective permeability (P(eff)) of GO. However, the rat jejunal permeability of ZHE was significantly enhanced by the addition of HNAP in a concentration-dependent manner, from essentially zero without HNAP to 4.0 x 10(-5) cm/s with 10 mM HNAP, matching the P(eff) of the high-permeability standard metoprolol. The success of ZHE-HNAP was explained by its >100-fold stronger K(11(aq)) versus GO-HNAP, making ZHE-HNAP less prone to dissociation and ion-exchange with competing endogenous anions and able to remain intact during membrane permeation. Overall, this

  12. Istorija mojei semi / Aleksandr Stahhovitsh ; per. s frantsuzskogo: Aleksei Gluhhov

    Index Scriptorium Estoniae

    Stahhovitsh, Aleksandr

    1998-01-01

    Vene emigrandi poja, prantsuse diplomaadi mälestused oma suguvõsast, kirjutatud Luxembourgis 1967. a. augustis. Vt. ka Aleksei Gluhhovi artiklit 'S tem zhe dostoinstvom i veroi' (Võshgorod 1998, nr. 4, lk. 6-8)

  13. Comparison of broiler performance, carcass yields and intestinal ...

    African Journals Online (AJOL)

    Comparison of broiler performance, carcass yields and intestinal microflora when fed diets containing transgenic (Mon-40-3-2) and conventional soybean meal. Jianzhuang Tan, Shasha Liu, Zhe Sun, Hongfu Zhang, Yongwei wang, Dan Liu ...

  14. TRANSPORT AND DEPOSITION OF NANO-SIZE PARTICLES IN THE UPPER HUMAN RESPIRATORY AIRWAYS

    Science.gov (United States)

    TRANSPORT AND DEPOSITION OF NANO-SIZE PARTICLES IN THE UPPER HUMAN RESPIRATORY AIRWAYS. Zhe Zhang*, Huawei Shi, Clement Kleinstreuer, Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695-7910; Chong S. Kim, National Health and En...

  15. Reducing arsenic accumulation in rice grain through iron oxide amendment

    Science.gov (United States)

    In this research, we investigated the accumulation of arsenic (As), selenium (Se), molybdenum (Mo), and cadmium (Cd) in rice grain under different soil conditions in standard straighthead-resistant and straighthead-susceptible cultivars, Zhe 733 and Cocodrie, respectively. Results demonstrated that,...

  16. Late Eocene Uplift of the Al Hajar Mountains, Oman, Supported by Stratigraphy and Low-Temperature Thermochronology

    Science.gov (United States)

    Hansman, Reuben J.; Ring, Uwe; Thomson, Stuart N.; den Brok, Bas; Stübner, Konstanze

    2017-12-01

    Uplift of the Al Hajar Mountains in Oman has been related to either Late Cretaceous ophiolite obduction or the Neogene Zagros collision. To test these hypotheses, the cooling of the central Al Hajar Mountains is constrained by 10 apatite (U-Th)/He (AHe), 15 fission track (AFT), and four zircon (U-Th)/He (ZHe) sample ages. These data show differential cooling between the two major structural culminations of the mountains. In the 3 km high Jabal Akhdar culmination AHe single-grain ages range between 39 ± 2 Ma and 10 ± 1 Ma (2σ errors), AFT ages range from 51 ± 8 Ma to 32 ± 4 Ma, and ZHe single-grain ages range from 62 ± 3 Ma to 39 ± 2 Ma. In the 2 km high Saih Hatat culmination AHe ages range from 26 ± 4 to 12 ± 4 Ma, AFT ages from 73 ± 19 Ma to 57 ± 8 Ma, and ZHe single-grain ages from 81 ± 4 Ma to 58 ± 3 Ma. Thermal modeling demonstrates that cooling associated with uplift and erosion initiated at 40 Ma, indicating that uplift occurred 30 Myr after ophiolite obduction and at least 10 Myr before the Zagros collision. Therefore, this uplift cannot be related to either event. We propose that crustal thickening supporting the topography of the Al Hajar Mountains was caused by a slowdown of Makran subduction and that north Oman took up the residual fraction of N-S convergence between Arabia and Eurasia.

  17. Induction of dominant male sterility by using 60Co γ-rays irradiation in rice oryza sativa L

    International Nuclear Information System (INIS)

    Shu Qingyao; Wu Dianxing; Xia Yingwu; Gao Mingwei

    2000-01-01

    The fertility of M 1 plants, which developed from dried rice (c.v. Zhe9248) seeds treated with γ-rays at the dosage of 300 Gy, decreased dramatically, and some of the M 1 plants showed completely male sterile. There were still fertile and sterile plants in the M 2 F 1 population of artificially emasculated high sterile Zhe9248 M 1 plants crossed to normal variety G93-89, and consequently, Zhe9248 was back crossed to the sterile plants successively as recurrent parent. In all the above back cross populations, fertile and sterile plants segregated in a 1 : 1 ratio. The M 4 BC 2 male sterile plants were crossed to various rice materials, e.g. early season indica rice (Zhefu 504, H416), middle season indica rice (Chuan-si-ran-zhan, Yu-Zhan), maintainer lines (Fu-Nan B, 351 B) and restorer lines (IR36, 20964). In all the above F 1 populations, male sterile and fertile plants again segregated in a 1 : 1 ratio. In addition, sib-crossing were made in the back crosses and hybrid crosses between male sterile and fertile plants, male sterile and fertile plants appeared in a similar fashion as in test crosses. However, no male sterile plants were recovered from fertile plants either of back crosses or test crosses. The anthers of male sterile plants appeared small and poorly developed, the pollen showed typical abortion or round abortion, the seed set in bagged panicles was very low. The experimental data showed that this male sterile rice mutant was inherited in a single-gene mode

  18. (Brassicaceae) based on nuclear ribosomal ITS DNA sequences

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Genetics; Volume 93; Issue 2. Phylogeny and biogeography of Alyssum (Brassicaceae) based on nuclear ribosomal ITS DNA sequences. Yan Li Yan Kong Zhe Zhang Yanqiang Yin Bin Liu Guanghui Lv Xiyong Wang. Research Article Volume 93 Issue 2 August 2014 pp 313-323 ...

  19. Download this PDF file

    African Journals Online (AJOL)

    cadewumi

    Physical Science, Chinese Academy of Science, Hefei 230031, China, 3Department of Clinical of Pharmacy, Lishui People's Hospital, Zhe Jiang. 323000, China ... Conclusion: XJEK therapy in the 2K1C hypertensive rats affects the rise in blood pressure and ameliorates the severity of kidney injury. The protective effect is ...

  20. Assessment of toxicity of heavy metal contaminated soils for Collembola in the field and laboratory

    DEFF Research Database (Denmark)

    Xu, Jie; Krogh, Paul Henning; Luo, Yongming

    2008-01-01

    We present a field and laboratory investigation of effects of increasing levels of heavy metal contamination on the biodiversity and performance of collembolans. A 40 year old pollution with Cu, Zn, Pb and Cd pollution due to Cu smelting over 40 years was investigated in a paddy field area of Zhe...

  1. Electrical Transport Properties of Polycrystalline Monolayer Molybdenum Disulfide

    Science.gov (United States)

    2014-07-14

    Lou, Sina Najmaei, Matin Amani, Matthew L. Chin, Zheng Se. TASK NUMBER Liu Sf. WORK UNIT NUMBER 7. PERFORMING ORGANIZATION NAMES AND ADDRESSES 8...Transport Properties of Polycrystalline Monolayer Molybdenum Disulfide Sina Najmaei,t.§ Matin Ama ni,M Matthew L. Chin,* Zhe ng liu/ ·"·v: A. Gle n

  2. Color in packaging design : Case: ZheJiang JinSheng packaging Co,Ltd

    OpenAIRE

    Hu, Cuicui

    2010-01-01

    Color occupies an important position in packaging design, with the improvement of living standard, the higher requirement of color design in packaging. The aim of this thesis was to discuss key issues concerning aesthetics of packaging design. Topics will include an overview of the packaging design, the influence factor of packaging design, and introduce the aesthetics from packaging aspect. This thesis will also identify common problems of the production process, and list the phases of ho...

  3. Wind-Tunnel Investigation of Rear Underslung Fuselage Ducts

    Science.gov (United States)

    1943-09-01

    corolltiy, thk thihker and morp depleted the boundary “layer,,the grea$er Is the.tende~o#. toward “abp~btion tinder slight adverse press~re &rmbd~n$a. “ 9he...stream than from outlets A or B. Zhe results of the tests show that an approx~mately linear relationship exists between the total and the stattc

  4. O tom, tshto ushlo : [luuletused] / Aleksander Suuman ; Lühibiograafia: T. L. [Toomas Liiv

    Index Scriptorium Estoniae

    Suuman, Aleksander, 1927-2003

    1999-01-01

    Sisu: O tom, tshto ushlo ; "Gde-to dolzhno zhe bõt stshastje..." ; "Serõje lessa..." ; Zholtogolovõ ; "Teh iv serebristõh nelzja oboiti..." ; "Vzroslõje vkladtshinu pili..." ; "U nas tut, za Giperborejem..." / tlk. Svetlan Semenenko ; Odno hotshu skazat ; Los idjot / tlk. Boris Baljasnõi.Orig.: "Kusagil peab olema õnn..." ; Kullerkupud ; "Ei hõbepajust ma mööduda saand..." ; "Meil siin Hüperboreas..." ;

  5. Republic of Korea Army Aviation Study Group after Action Report

    Science.gov (United States)

    1979-04-27

    8217 a 1.. *Oj a 1 g, everyone attoncilag is invited to cont.rib𔃻,re to zhe r-ozolutioa .If the problema (s). E. Af Ler the WAIC announcement, if all...HMSELF IF nEEDS HAVE CHANGE, IF THE SOCIAL AND MORAL STANDARDS OF SOCIETY HAVE SHIFTED, IF THE OBJECTIVES HE HAS SET ARE ATTAINABLE. THE TEST OF THE

  6. Identifying Core Herbal Treatments for Children with Asthma: Implication from a Chinese Herbal Medicine Database in Taiwan

    Directory of Open Access Journals (Sweden)

    Hsing-Yu Chen

    2013-01-01

    Full Text Available Asthma is one of the most common allergic respiratory diseases around the world and places great burden on medical payment. Chinese herbal medicine (CHM is commonly used for Taiwanese children to control diseases. The aim of this study is to analyze the CHM prescriptions for asthmatic children by using a nationwide clinical database. The National Health Insurance Research Database (NHIRD was used to perform this study. Medical records from 1997 to 2009 with diagnosis with asthma made for children aged 6 to 18 were included into the analysis. Association rule mining and social network analysis were used to analyze the prevalence of single CHM and its combinations. Ma-Xing-Gan-Shi-Tang (MXGST was the most commonly used herbal formula (HF (20.2% of all prescriptions, followed by Xiao-Qing-Long-Tang (13.1% and Xing-Su-San (12.8%. Zhe Bei Mu is the most frequently used single herb (SH (14.6%, followed by Xing Ren (10.7%. MXGST was commonly used with Zhe Bei Mu (3.5% and other single herbs capable of dispelling phlegm. Besides, MXGST was the core formula to relieve asthma. Further studies about efficacy and drug safety are needed for the CHM commonly used for asthma based on the result of this study.

  7. Identifying core herbal treatments for children with asthma: implication from a chinese herbal medicine database in taiwan.

    Science.gov (United States)

    Chen, Hsing-Yu; Lin, Yi-Hsuan; Thien, Peck-Foong; Chang, Shih-Chieh; Chen, Yu-Chun; Lo, Su-Shun; Yang, Sien-Hung; Chen, Jiun-Liang

    2013-01-01

    Asthma is one of the most common allergic respiratory diseases around the world and places great burden on medical payment. Chinese herbal medicine (CHM) is commonly used for Taiwanese children to control diseases. The aim of this study is to analyze the CHM prescriptions for asthmatic children by using a nationwide clinical database. The National Health Insurance Research Database (NHIRD) was used to perform this study. Medical records from 1997 to 2009 with diagnosis with asthma made for children aged 6 to 18 were included into the analysis. Association rule mining and social network analysis were used to analyze the prevalence of single CHM and its combinations. Ma-Xing-Gan-Shi-Tang (MXGST) was the most commonly used herbal formula (HF) (20.2% of all prescriptions), followed by Xiao-Qing-Long-Tang (13.1%) and Xing-Su-San (12.8%). Zhe Bei Mu is the most frequently used single herb (SH) (14.6%), followed by Xing Ren (10.7%). MXGST was commonly used with Zhe Bei Mu (3.5%) and other single herbs capable of dispelling phlegm. Besides, MXGST was the core formula to relieve asthma. Further studies about efficacy and drug safety are needed for the CHM commonly used for asthma based on the result of this study.

  8. Improving treatment outcome assessment in a mouse tuberculosis model.

    Science.gov (United States)

    Mourik, Bas C; Svensson, Robin J; de Knegt, Gerjo J; Bax, Hannelore I; Verbon, Annelies; Simonsson, Ulrika S H; de Steenwinkel, Jurriaan E M

    2018-04-09

    Preclinical treatment outcome evaluation of tuberculosis (TB) occurs primarily in mice. Current designs compare relapse rates of different regimens at selected time points, but lack information about the correlation between treatment length and treatment outcome, which is required to efficiently estimate a regimens' treatment-shortening potential. Therefore we developed a new approach. BALB/c mice were infected with a Mycobacterium tuberculosis Beijing genotype strain and were treated with rifapentine-pyrazinamide-isoniazid-ethambutol (R p ZHE), rifampicin-pyrazinamide-moxifloxacin-ethambutol (RZME) or rifampicin-pyrazinamide-moxifloxacin-isoniazid (RZMH). Treatment outcome was assessed in n = 3 mice after 9 different treatment lengths between 2-6 months. Next, we created a mathematical model that best fitted the observational data and used this for inter-regimen comparison. The observed data were best described by a sigmoidal E max model in favor over linear or conventional E max models. Estimating regimen-specific parameters showed significantly higher curative potentials for RZME and R p ZHE compared to RZMH. In conclusion, we provide a new design for treatment outcome evaluation in a mouse TB model, which (i) provides accurate tools for assessment of the relationship between treatment length and predicted cure, (ii) allows for efficient comparison between regimens and (iii) adheres to the reduction and refinement principles of laboratory animal use.

  9. Early myocardial damage assessment in dystrophinopathies using 99Tcm-MIBI gated myocardial perfusion imaging

    Directory of Open Access Journals (Sweden)

    Zhang L

    2015-12-01

    Full Text Available Li Zhang,1,* Zhe Liu,2,* Ke-You Hu,3 Qing-Bao Tian,3 Ling-Ge Wei,4 Zhe Zhao,5 Hong-Rui Shen,5 Jing Hu5 1Department of Cardiovascular Disorders, 2Department of Geriatrics, The Third Hospital of Hebei Medical University, 3The Public Health Department, Hebei Medical University, 4Department of Nuclear Medicine, 5Department of Neuromuscular Disorders, The Third Hospital of Hebei Medical University, Shijiazhuang, People’s Republic of China *Li Zhang and Zhe Liu are first coauthors of this paper Background: Early detection of muscular dystrophy (MD-associated cardiomyopathy is important because early medical treatment may slow cardiac remodeling and attenuate symptoms of cardiac dysfunction; however, no sensitive and standard diagnostic method for MD at an earlier stage has been well-recognized. Thus, the aim of this study was to test the early diagnostic value of technetium 99m-methoxyisobutylisonitrile (99Tcm-MIBI gated myocardial perfusion imaging (G-MPI for MD.Methods and results: Ninety-one patients underwent 99Tcm-MIBI G-MPI examinations when they were diagnosed with Duchenne muscular dystrophy (DMD (n=77 or Becker muscular dystrophy (BMD; n=14. 99Tcm-MIBI G-MPI examinations were repeated in 43 DMD patients who received steroid treatments for 2 years as a follow-up examination. Myocardial defects were observed in nearly every segment of the left ventricular wall in both DMD and BMD patients compared with controls, especially in the inferior walls and the apices by using 99Tcm-MIBI G-MPI. Cardiac wall movement impairment significantly correlated with age in the DMD and BMD groups (rs=0.534 [P<0.05] and rs=0.784 [P<0.05], respectively. Intermittent intravenous doses of glucocorticoids and continuation with oral steroid treatments significantly improved myocardial function in DMD patients (P<0.05, but not in BMD patients.Conclusion: 99Tcm-MIBI G-MPI is a sensitive and safe approach for early evaluation of cardiomyopathy in patients with DMD or BMD

  10. Thermochronometrically constrained anatomy and evolution of a Miocene extensional accommodation zone and tilt domain boundary: The southern Wassuk Range, Nevada

    Science.gov (United States)

    Gorynski, Kyle E.; Stockli, Daniel F.; Douglas Walker, J.

    2013-06-01

    (AHe) and Zircon (ZHe) (U-Th)/He thermochronometric data from the southern Wassuk Range (WR) coupled with 40Ar/39Ar age data from the overlying tilted Tertiary section are used to constrain the thermal evolution of an extensional accommodation zone and tilt-domain boundary. AHe and ZHe data record two episodes of rapid cooling related to the tectonic exhumation of the WR fault block beginning at ~15 and ~4 Ma. Extension was accommodated through fault-block rotation and variably tilted the southern WR to the west from ~60°-70° in the central WR to ~15°-35° in the southernmost WR and Pine Grove Hills, and minimal tilting in the Anchorite Hills and along the Mina Deflection to the south. Middle Miocene geothermal gradient estimates record heating immediately prior to large-magnitude extension that was likely coeval with the extrusion of the Lincoln Flat andesite at ~14.8 Ma. Geothermal gradients increase from ~19° ± 4°C/km to ≥ 65° ± 20°C/km toward the Mina Deflection, suggesting that it was the focus of Middle Miocene arc magmatism in the upper crust. The decreasing thickness of tilt blocks toward the south resulted from a shallowing brittle/ductile transition zone. Postmagmatic Middle Miocene extension and fault-block advection were focused in the northern and central WR and coincidentally moderated the large lateral thermal gradient within the uppermost crust.

  11. Research on Foreign Background and Musical Thought of Teng Gu

    Directory of Open Access Journals (Sweden)

    Bo Zhang

    2014-12-01

    Full Text Available TENG Gu is a famous art historian in Republic of China. Together with early Chinese scholars studying abroad like ZONG Bai-hua, ZHU Guang-qian, DENG Yi-zhe, MA Cai and FU Bao-shi, he constructed a framework of early Chinese Art. We still know his influence after a century. In his artistic thought, the essential music idea occupies 1/3.He had given music the highest position among all arts and cultures. In his view, culture won’t have any value if art is removed. And all arts follow the rhythm of music.

  12. Effect of the Ionosphere on Radiowave Systems (Based on Ionospheric Effects Symposium)

    Science.gov (United States)

    1981-04-30

    expressed as + 2 K(i) 7 e V 3 where the + and - signs correspond to the polarization of the ordinary (0) and extra -ordinary (X) mode, and we is Zhe plasma...and 0 represent the extra - ordinary and ordinary modes of propagation. k 20 - "t t I t ? .& I % • I " r"V0N,/, I V, / ’ :• O •’ •~~ .. . 4’~"r’t...Luhmann, W.A. Kolasinski, and J.B. Blake, J. Ceophys. Res., 83, 5573, 1978. Renda , G. and J. Lowrence, JPL SP43-21, 91, 0975. Rugge, H.R., D.L

  13. The Exhumation of the Central Lhasa, Tibet: Evidence from the Low-temperature Thermochronology

    Science.gov (United States)

    Sun, G.; Xiumian, H.; Sinclair, H. D.; Stuart, F. M.

    2017-12-01

    The modern Tibetan Plateau has an average elevation of 4500 m above the sea level. But its early growth history still remains debate, despite its significance to the global climate system. In common, the early growth of the Tibetan Plateau has been attributed to the India-Asia collision in the early Paleocene. However, the structural reconstruction, Late Cretaceous sedimentation, and petrology studies, imply there would be a paleo-plateau or the high-elevation gain in the Lhasa terrane prior to the India-Asia collision. In order to examine this model, the zircon/apatite U-Th-He (ZHe and AHe) and apatite fission track (AFT) are employed to the mid-Cretaceous granites in Coqen area, central Lhasa. Eight samples from the plateau surface yield ZHe ages ranging from 88 to 54 Ma, while the AHe ages ranging from 70 to 45 Ma. Five samples from the above have been conducted the AFT analysis and yielded AFT ages ranging between 73 and 62 Ma, showing the similar age ranges with the corresponding AHe ages. Single-sample inverse thermal kinetic modeling reveal that these intrusive rocks have undergone the rapid cooling history since 85 Ma, after when, the relatively slow cooling process has been established at 45 Ma. Inverse thermal-kinetic modeling of these data, recorded in the context of the Late Cretaceous rapid cooling history, is best interpreted by the early plateau growth in the central Lhasa. In consideration of the substantial crustal thickening and shortening in the Lhasa terrane during the Cretaceous, this Late Cretaceous-Early Paleogene rapid cooling history reveal that the exhumation of the central Lhasa has initiated before the India-Asia collision. This scenario is consistent with a 30 Ma ( 90-60 Ma) sedimentation hiatus since the Late Cretaceous terrestrial conglomerate deposition in the central Lhasa terrane.

  14. Thermochronological constraints on the Cambrian to recent geological evolution of the Argentina passive continental margin

    Science.gov (United States)

    Kollenz, Sebastian; Glasmacher, Ulrich A.; Rossello, Eduardo A.; Stockli, Daniel F.; Schad, Sabrina; Pereyra, Ricardo E.

    2017-10-01

    Passive continental margins are geo-archives that store information from the interplay of endogenous and exogenous forces related to continental rifting, post-breakup history, and climate changes. The recent South Atlantic passive continental margins (SAPCMs) in Brazil, Namibia, and South Africa are partly high-elevated margins ( 2000 m a.s.l.), and the recent N-S-trending SAPCM in Argentina and Uruguay is of low elevation. In Argentina, an exception in elevation is arising from the higher topography (> 1000 m a.s.l.) of the two NW-SE-trending mountain ranges Sierras Septentrionales and Sierras Australes. Precambrian metamorphic and intrusive rocks, and siliciclastic rocks of Ordovician to Permian age represent the geological evolution of both areas. The Sierras Australes have been deformed and metamorphosed (incipient - greenschist) during the Gondwanides Orogeny. The low-temperature thermochronological (LTT) data (history of the Gondwanides and the Mesozoic and Cenozoic South Atlantic geological evolution. Upper Carboniferous zircon (U-Th/He)-ages (ZHe) indicate the earliest cooling below 180 °C/1 Ma. Most of the ZHe-ages are of Upper Triassic to Jurassic age. The apatite fission-track ages (AFT) of Sierras Septentrionales and the eastern part of Sierras Australes indicate the South Atlantic rifting and, thereafter. AFT-ages of Middle to Upper Triassic on the western side of the Sierras Australes are in contrast, indicating a Triassic exhumation caused by the eastward thrusting along the Sauce Grande wrench. The corresponding t-T models report a complex subsidence and exhumation history with variable rates since the Ordovician. Based on the LTT-data and the numerical modelling we assume that the NW-SE-trending mountain ranges received their geographic NW-SE orientation during the syn- to post-orogenic history of the Gondwanides.

  15. The compressibility and the capacitance coefficient of helium-oxygen atmospheres.

    Science.gov (United States)

    Imbert, G; Dejours, P; Hildwein, G

    1982-12-01

    The capacitance coefficient beta of an ideal gas mixture depends only on its temperature T, and its value is derived from the ideal gas law (i.e., beta = 1/RT, R being the ideal gas constant). But real gases behave as ideal gases only at low pressures, and this would not be the case in deep diving. High pressures of helium-oxygen are used in human and animal experimental dives (up to 7 or 12 MPa or more, respectively). At such pressures deviations from the ideal gas law cannot be neglected in hyperbaric atmospheres with respect to current accuracy of measuring instruments. As shown both theoretically and experimentally by this study, the non-ideal nature of helium-oxygen has a significant effect on the capacitance coefficient of hyperbaric atmospheres. The theoretical study is based on interaction energy in either homogeneous (He-He and O2-O2) or heterogeneous (He-O2) molecular pairs, and on the virial equation of state for gas mixtures. The experimental study is based on weight determination of samples of known volume of binary helium-oxygen mixtures, which are prepared in well-controlled pressure and temperature conditions. Our experimental results are in good agreement with theoretical predictions. 1) The helium compressibility factor ZHe increases linearly with pressure [ZHe = 1 + 0.0045 P (in MPa) at 30 degrees C]; and 2) in same temperature and pressure conditions (T = 303 K and P = 0.1 to 15 MPa), the same value for Z is valid for a helium-oxygen binary mixture and for pure helium. As derived from the equation of state of real gases, the capacitance coefficient is inversely related to Z (beta = 1/ZRT); therefore, for helium-oxygen mixtures, this coefficient would decrease with increasing pressure. A table is given for theoretical values of helium-oxygen capacitance coefficient, at pressures ranging from 0.1 to 15.0 MPa and at temperatures ranging from 25 degrees C to 37 degrees C.

  16. Exhumation History of the North Queensland Segment of Australia's Elevated Passive Margin Escarpment as Revealed by (U-Th)/He Analysis of Apatite and Zircon

    Science.gov (United States)

    Abbott, L. D.; Glass, J.; Flowers, R. M.; Metcalf, J. R.

    2016-12-01

    Australia's east coast constitutes an elevated passive continental margin that developed in response to Cretaceous-Paleogene rifting during opening of the Tasman and Coral seas. Typical of elevated passive margins around the world, Australia's east coast consists of a high plateau bounded by an abrupt escarpment, known as the Great Escarpment. We employed the apatite (AHe) and zircon (ZHe) (U-Th)/He low temperature thermochronometers to explore the exhumation history of the North Queensland segment of the Great Escarpment. Our 1500m vertical transect was conducted up the southeast flank of Mount Bartle Frere, which exposes the Bartle Frere pluton of the ca. 280 Ma Bellenden Ker Batholith. A previous apatite fission track (AFT) study determined that an outcrop of the Bartle Frere pluton at Josephine Falls, which constitutes the base of our transect, cooled through 110 °C at 142.3 ±9.9Ma. Our preliminary ZHe analysis of the same outcrop reveals that it passed through 180 °C at ca. 155 Ma. These data point to an episode of relatively rapid exhumation during the latest Jurassic to earliest Cretaceous, which brought the Bartle Frere pluton from approximately 6 km burial depth to 3.5 km depth (assuming a 30 °C/km geothermal gradient). Samples throughout our entire transect yield AHe dates that range between 72Ma and 182Ma, with no apparent elevation-date relationship. These data suggest that the pluton cooled below 65 °C during the Cretaceous, indicating unroofing to less than 2 km depth by that time. The data scatter makes it difficult to resolve the details of this Cretaceous cooling episode. However, the fact that we obtain Cretaceous AHe dates across the entire 1500 m height of the transect suggests that the Great Escarpment in North Queensland has existed at approximately its current location and height since at least the Late Cretaceous. The Cretaceous age for this segment of the Great Escarpment is similar to the age determined by other AHe workers for the

  17. Belaja shkola, Dom ofitserov i notshnoi klub v raznoje vremja razmeshtshalis pod odnoi i toi zhe krõshei / Olaf Esna

    Index Scriptorium Estoniae

    Esna, Olaf, 1934-

    2005-01-01

    Pärnu Tütarlaste Gümnaasiumi hoone ehitusest Rüütli tänavale (1866). Ehitasid eesti külamehed eesotsas Jaan Tammanniga Šveitsi arhitekti Rudolf Maagi järelvalve all. Alates 1902. a. tegutsesid nn. "valges majas" mitmed asutused, ka linnaapteek, millele projekteeris unikaalse mööbli Olev Siinmaa

  18. Erratum: Erratum to: Realistic interpretation of quantum mechanics and encounter-delayed-choice experiment

    Science.gov (United States)

    Long, GuiLu; Qin, Wei; Yang, Zhe; Li, Jun-Lin

    2018-06-01

    The article Realistic interpretation of quantum mechanics and encounter-delayed-choice experiment, written by GuiLu Long, Wei Qin, Zhe Yang, and Jun-Lin Li, was originally published online without open access. After publication in volume 61, issue 3: 030311 the author decided to opt for Open Choice and to make the article an open access publication. Therefore, the copyright of the article has been changed to The Author(s) 2017 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The original article has been corrected.

  19. Cuisine: the concept and its health and nutrition implications--a Hangzhou perspective.

    Science.gov (United States)

    AiZhen, Zhang; YuHong, Wu; MacLennan, Robert

    2004-01-01

    Cuisine is an activity that meets human physical and psychological needs. With the development of civilization, cuisine is an important component of culture and includes the dietary profession. However, each nation or each area has its own characteristic cuisine. There are eight major styles of Chinese cuisine, Hangzhou style is an important part of Zhe style. It was divided into two branches named 'Lake branch' and 'Town branch'. An ideal Chinese dish should satisfy in terms of colour, aroma, taste, shape, texture and sustenance. But nowadays, people pay more attention to other aspects of dishes than sustenance. It is estimated that food and beverages will cost up to 570 billion RMB (about 69 billion US dollars) in China this year. The incidence of chronic diseases also increases year after year. There are 40 million diabetic and 70 million obese persons in China. Hence it is important to make efforts to promote in-depth knowledge of cooking and nutrition.

  20. Sulfonate-modified phenylboronic acid-rich nanoparticles as a novel mucoadhesive drug delivery system for vaginal administration of protein therapeutics: improved stability, mucin-dependent release and effective intravaginal placement

    Directory of Open Access Journals (Sweden)

    Li CY

    2016-11-01

    Full Text Available ChunYan Li,1 ZhiGang Huang,2 ZheShuo Liu,1 LiQian Ci,3 ZhePeng Liu,3 Yu Liu,2 XueYing Yan,1 WeiYue Lu2 1School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, 2Department of Pharmaceutics, School of Pharmacy, Key Laboratory of Smart Drug Delivery, Ministry of Education, Fudan University, 3School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, People’s Republic of China Abstract: Effective interaction between mucoadhesive drug delivery systems and mucin is the basis of effective local placement of drugs to play its therapeutic role after mucosal administration including vaginal use, which especially requires prolonged drug presence for the treatment of gynecological infectious diseases. Our previous report on phenylboronic acid-rich nanoparticles (PBNPs demonstrated their strong interaction with mucin and mucin-sensitive release profiles of the model protein therapeutics interferon (IFN in vitro, but their poor stability and obvious tendency to aggregate over time severely limited future application. In this study, sulfonate-modified PBNPs (PBNP-S were designed as a stable mucoadhesive drug delivery system where the negative charges conferred by sulfonate groups prevented aggregation of nanoparticles and the phenylboronic acid groups ensured effective interaction with mucin over a wide pH range. Results suggested that PBNP-S were of spherical morphology with narrow size distribution (123.5 nm, polydispersity index 0.050, good stability over a wide pH range and 3-month storage and considerable in vitro mucoadhesion capability at vaginal pH as shown by mucin adsorption determination. IFN could be loaded to PBNP-S by physical adsorption with high encapsulation efficiency and released in a mucin-dependent manner in vitro. In vivo near-infrared fluorescent whole animal imaging and quantitative vaginal lavage followed by enzyme-linked immunosorbent assay (ELISA assay of

  1. A comprehensive sediment dynamics study of a major mud belt system on the inner shelf along an energetic coast.

    Science.gov (United States)

    Liu, James T; Hsu, Ray T; Yang, Rick J; Wang, Ya Ping; Wu, Hui; Du, Xiaoqin; Li, Anchun; Chien, Steven C; Lee, Jay; Yang, Shouye; Zhu, Jianrong; Su, Chih-Chieh; Chang, Yi; Huh, Chih-An

    2018-03-09

    Globally mud areas on continental shelves are conduits for the dispersal of fluvial-sourced sediment. We address fundamental issues in sediment dynamics focusing on how mud is retained on the seabed on shallow inner shelves and what are the sources of mud. Through a process-based comprehensive study that integrates dynamics, provenance, and sedimentology, here we show that the key mechanism to keep mud on the seabed is the water-column stratification that forms a dynamic barrier in the vertical that restricts the upward mixing of suspended sediment. We studied the 1000 km-long mud belt that extends from the mouth of the Changjiang (Yangtze) River along the coast of Zhejiang and Fujian Provinces of China and ends on the west coast of Taiwan. This mud belt system is dynamically attached to the fluvial sources, of which the Changjiang River is the primary source. Winter is the constructive phase when active deposition takes place of fine-grained sediment carried mainly by the Changjiang plume driven by Zhe-Min Coastal Currents southwestward along the coast.

  2. Mesoporous silica nanoparticles for stimuli-responsive controlled drug delivery: advances, challenges, and outlook

    Directory of Open Access Journals (Sweden)

    Song Y

    2016-12-01

    Full Text Available Yuanhui Song, Yihong Li, Qien Xu, Zhe Liu Wenzhou Institute of Biomaterials and Engineering (WIBE, Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China Abstract: With the development of nanotechnology, the application of nanomaterials in the field of drug delivery has attracted much attention in the past decades. Mesoporous silica nanoparticles as promising drug nanocarriers have become a new area of interest in recent years due to their unique properties and capabilities to efficiently entrap cargo molecules. This review describes the latest advances on the application of mesoporous silica nanoparticles in drug delivery. In particular, we focus on the stimuli-responsive controlled release systems that are able to respond to intracellular environmental changes, such as pH, ATP, GSH, enzyme, glucose, and H2O2. Moreover, drug delivery induced by exogenous stimuli including temperature, light, magnetic field, ultrasound, and electricity is also summarized. These advanced technologies demonstrate current challenges, and provide a bright future for precision diagnosis and treatment. Keywords: mesoporous silica nanoparticle, drug delivery system, controlled release, stimuli-responsive, chemotherapy

  3. ASPECTUAL INFLUENCE ON TEMPORAL RELATIONS: A CASE STUDY OF THE EXPERIENTIAL GUO IN MANDARINE

    Directory of Open Access Journals (Sweden)

    Jiun-Shiung Wu

    2009-12-01

    Full Text Available This paper examines how the temporal relation between a clause containing the experiential guo and an adjacent clause is determined. Mandarin is a language not morphologically marked for tenses (e.g., Lin 2006, and therefore, tenses cannot help in determining temporal relations in Mandarin. However, Mandarin has a rich aspectual system. This paper argues that the experiential guo indirectly influences temporal relations via rhetorical relations by either specifying a default rhetorical relation, or by constraining the circumstances under which a certain rhetorical relation can connect a clause with guo to an adjacent clause. This paper also argues that the default rhetorical relation and the constraints are determined by the aspectual properties of the experiential marker. Other information, such as discourse connectors, lexical information, etc., can override the default rhetorical relation indicated by guo and specifies a rhetorical relation. Therefore, this paper concludes that in Mandarin aspect markers can indirectly affect temporal relations by means of rhetorical relations, a result consistent with Wu’s (2005b paper on the perfective marker le in Mandarin, and Wu’s (2007b, 2004 work on the progressive marker zai and the durative marker zhe.

  4. Heterogeneous Cenozoic cooling of central Britain: insights into the complex evolution of the North Atlantic passive margin

    Science.gov (United States)

    Łuszczak, Katarzyna; Persano, Cristina; Stuart, Finlay

    2015-04-01

    The western flank of the North Atlantic passive margin has experienced multiple episodes of rock uplift and denudation during the Cenozoic that have been locally variable in scale. Two regional scale exhumation events have been identified: early Palaeogene and Neogene [see 1 for review]. The former has been identified both onshore and offshore and it appears to be temporally coincident with basaltic magmatism related to the arrival of the proto-Iceland mantle plume beneath thinned continental lithosphere, which may have cause long wavelength, low amplitude dynamic uplift. Quantifying the amount of early Palaeogene exhumation using mineral thermochronometers may be complicated by elevated heat flow. The magnitude and timing of exhumation during the Neogene is even less clear, as is the driving mechanism. Quantifying the amount of early Palaeogene exhumation, determining the precise timing as well as the amount of uplift and erosion in the Neogene, require detailed application of low temperature thermochronometers. Here we present the first multiple low temperature thermochronometer study from S Scotland, N England and N Wales. New apatite fission track (AFT) data are integrated with apatite and zircon (U-Th-Sm)/He (AHe and ZHe, respectively) ages to establish regional rock cooling history from 200°C to 30°C. To precisely constrain the early Palaeogene cooling history, and to better define the possible Neogene cooling event, >20 single grain AHe ages have been produced on key samples and modelled using the newly codified HelFrag technique. The new AFT and AHe ages confirm earlier studies that show the Lake District and North Pennines experienced rapid cooling from >120°C in the Palaeogene. The amount of cooling/exhumation gradually decreases northwards into S Scotland and southwards in N Wales; there is no evidence for the rapid Palaeogene event in areas ~70 km from the Lake District centre. Inverse modelling of the AHe and AFT data suggest that the rapid cooling

  5. Fossil Fuel-Derived Polycyclic Aromatic Hydrocarbons in the Taiwan Strait, China, and Fluxes across the Air-Water Interface.

    Science.gov (United States)

    Ya, Miaolei; Xu, Li; Wu, Yuling; Li, Yongyu; Zhao, Songhe; Wang, Xinhong

    2018-06-14

    On the basis of the application of compound-specific radiocarbon analysis (CSRA) and air-water exchange models, the contributions of fossil fuel and biomass burning derived polycyclic aromatic hydrocarbons (PAHs) as well as their air-water transport were elucidated. The results showed that fossil fuel-derived PAHs (an average contribution of 89%) presented the net volatilization process at the air-water interface of the Taiwan Strait in summer. Net volatile fluxes of the dominant fluorene and phenanthrene (>58% of the total PAHs) were 27 ± 2.8 μg m -2 day -1 , significantly higher than the dry deposition fluxes (average 0.43 μg m -2 day -1 ). The Δ 14 C contents of selected PAHs (fluorene, phenanthrene plus anthracene, fluoranthene, and pyrene) determined by CSRA in the dissolved seawater ranged from -997 ± 4‰ to -873 ± 6‰, indicating that 89-100% (95 ± 4%) of PAHs were supplied by fossil fuels. The South China Sea warm current originating from the southwest China in summer (98%) and the Min-Zhe coastal current originating from the north China in winter (97%) input more fossil fuel PAHs than the Jiulong River estuary (90%) and Xiamen harbor water (93%). The more radioactive decayed 14 C of fluoranthene (a 4-ring PAH) than that of phenanthrene and anthracene (3-ring PAHs) represented a greater fossil fuel contribution to the former in dissolved seawater.

  6. Ranges of Iodine and Bromine Isotopes Produced in the Interaction of High-Energy Protons with Uranium; Isotopes de l'Iode et du Brome Produits par l'Interaction de Protons de Haute Energie avec l'Uranium; 041f 0420 041e 0411 0415 0413 0418 0418 0417 041e 0422 041e 041f 041e 0412 0419 041e 0414 0410 0418 0411 0420 041e 041c 0410 , 041f 041e 041b 0423 0427 0415 041d 041d 042b 0425 041f 0420 0418 0412 0417 0410 0418 041c 041e 0414 0415 0419 0421 0422 0412 0418 0418 041f 0420 041e - 0422 041e 041d 041e 0412 0411 041e 041b 042c 0428 041e 0419 042d 041d 0415 0420 0413 0418 0418 0421 0423 0420 0410 041d 041e 041c ; Alcance de los Isotopos del Yodo y del Bromo Producidos en la Interaccion de Protones de Alta Energia con el Uranio

    Energy Technology Data Exchange (ETDEWEB)

    Brandt, R. [CERN, Geneva (Switzerland); Max Planck Institut fuer Kernphysik, Heidelberg, Federal Republic of Germany (Germany)

    1965-07-15

    la produccion de isotopos deficientes en neutrones vuelve a observarse empleando altas energias de bombardeo. El autor centra su estudio en esos isotopos deficientes en neutrones, que practicamente se producen solo a niveles superiores a 1 GeV; a energias de bombardeo mas elevadas, su alcance esta limitado aproximada mente a la mitad del alcance de los productos de fision normales, lo que indica que se forman en virtud de un proceso distinto del de fision. El autor examina estas conclus iones teniendo en cuenta modelosde 'espalacion ' y de ' fragmentacion '. definiendo de nuevo estos dos terminos. (author) [Russian] Obychnye jeksperimenty po probegam s ispol'zovaniem tolstoj uranovoj fol'gi vmeste s aljuminievymi lovushkami i dozimetrami provodjatsja na dvuh uskoriteljah CERN s protonami, imejushhimi jenergii 0,55 Bjev i 18,2 Bjev. Iod (ili brom) vydeljadtsja himicheshim putem i razdeljaetsja v separatore radioizotopov v CERN. V rezul'tate poluchajut obrazcy bez nositelja, soderzhashhie po sushhestvu tol'ko odin chistyj radioaktivnyj izotop. Opredeljaetsja takzhe vyhod himicheskih produktov. Analiz dannyh pozvoljaet poluchit' neposredstvenno probeg dlja kazhdogo izotopa v urane. Vse izotopy joda imejut odin i tot zhe probeg pri jenergii protonov 0,55 Bjev, t.e. oni vse obrazujutsja v processe delenija. Ranee bylo izvestno, chto izotopy Joda s izbytkom nejtronov imejut priblizitel'no odin i tot zhe probeg, nezavisimo ot togo,prevyshaet li jenergija protonov 1 Bjev ili ona nizhe jetogo urovnja, a takzhe, chto izotopy joda s nedostatkom nejtronov dajut rezkoe sokrashhenie, priblizitel'no na polovinu, pri uvelichenii jenergii protonov svyshe 1 Bjev. Pokazyvaetsja, chto jeto sokrashhenie probega proishodit dovol'no vnezapno, privodja k skachku na krivoj zavisimosti probega ot massy izotopa joda. Izotopy s nedostatkom nejtronov, imeja sokrashhennyj probeg pri jenergii protonov svyshe I Bjev, javljajutsja temi zhe samymi izotopami, v otnoshenii kotoryh nabljudalos' sil

  7. Promoting adherence to nebulized therapy in cystic fibrosis: poster development and a qualitative exploration of adherence

    Directory of Open Access Journals (Sweden)

    Jones S

    2015-08-01

    Full Text Available Stephen Jones,1 Nathan Babiker,2 Emma Gardner,2,3 Jane Royle,2 Rachael Curley,3,4 Zhe Hui Hoo,3,4 Martin J Wildman3,4 1Psychology Department, University of Sheffield, 2Psychological Services, Sheffield Teaching Hospitals NHS Foundation Trust, 3Adult Cystic Fibrosis Unit, Northern General Hospital, 4School of Health and Related Research (ScHARR, University of Sheffield, Sheffield, UK Background: Cystic fibrosis (CF health care professionals recognize the need to motivate people with CF to adhere to nebulizer treatments, yet little is known about how best to achieve this. We aimed to produce motivational posters to support nebulizer adherence by using social marketing involving people with CF in the development of those posters. Methods: The Sheffield CF multidisciplinary team produced preliminary ideas that were elaborated upon with semi-structured interviews among people with CF to explore barriers and facilitators to the use of nebulized therapy. Initial themes and poster designs were refined using an online focus group to finalize the poster designs. Results: People with CF preferred aspirational posters describing what could be achieved through adherence in contrast to posters that highlighted the adverse consequences of nonadherence. A total of 14 posters were produced through this process. Conclusion: People with CF can be engaged to develop promotional material to support adherence, providing a unique perspective differing from that of the CF multidisciplinary team. Further research is needed to evaluate the effectiveness of these posters to support nebulizer adherence. Keywords: behavior change, social marketing, patient participation, nebulizers, medication adherence

  8. The Enhanced Radiocaesium Levels of People in Northern Sweden; Charge Corporelle de Radiocesium Relativement Elevie chez les Habitants de la Suede Septentrionale; 041f 041e 0414 0 ; Cargas de Radiocesio Anormalmente Elevadas en los Habitantes del Norte de Suecia

    Energy Technology Data Exchange (ETDEWEB)

    Liden, K.; Naversten, Y. [Radiation Physics Department, University of Lund (Sweden)

    1964-11-15

    recuento en abril de 1962 a un grupo de 157 personas. Eri esta ocasion la carga de cesio-137 oscilo entre 30 y 740 nc. En el curso de una expedicion que en cinco semanas visito a siete centros de Suecia septentrional en abril de 1963, se examinaron en total 458 personas con el-mismo contador montado en un omnibus. Esta vez, la carga de cesio-137 de los lapones de la zona antes mencionada estuvo comprendida entre 50 y 900 nc. La carga media de cesio-137 en todos los criadores de renos (78 hombres adultos), medida en abril de 1963, fue de 461 nc. La carga corporal maxima observada fue de 1340 nc de cesio-137. Se facilitan detalles sobre la variacion de la carga de cesio-137 en funcion de la edad, el sexo, el tipo de ocupacion y el regimen alimenticio, asi como sobre las, variaciones estacionales y geograficas observadas. De 1961 a 1963 se ha advertido un aumento de la carga corporal media de cesio-137. Con fines comparativos, se sometio tambien a recuento a individuos noilapones. En casi todos ellos se observo una carga, de cesio-137, muy elevada en comparacion con la de los habitantes del sur de Suecia. La dosis de irradiacion debida al cesio-137 suele ser dos o tres vepes mayor que la debida al potasio-40, siendo el maximo observado 8 veces mayor. (author) [Russian] Posle obnaruzhenija vysokogo soderzhanija cezija-13? v organizme u shvedskih loparej v nachale 1961 goda bylo provedeno obsledovanie bol'shih grupp loparej i drugih zhitelej Shvecii, poluchajushhih takuju zhe dietu. V sentjabre 1961 goda obsledovali 162 cheloveka iz rajona, primykajushhego v Arkticheskomu krugu; izmerenija proizvodilis' s pomoshh'ju poluperenosnogo schetchika dlja izmerenija radioaktivnosti vsego organizma. V gruppe loparej soderzhanie cezija-137 nahodilos' v predelah ot 15 do 690 mmkkjuri. V jetom zhe rajone v aprele 1962 goda byla obsledovana gruppa iz 157 chelovek. V jeto vremja uroven' cezija-137 sostavljal 30-740 mmkkjuri. Vo vremja 5-nedel'noj jekspedicii v 7 razlichnyh centrah severnoj

  9. Efficacy of atorvastatin on the prevention of contrast-induced acute kidney injury: a meta-analysis

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    Liu L

    2018-03-01

    Full Text Available Ling-Yun Liu,1 Yang Liu,2 Mei-Yan Wu,2 Yan-Yan Sun,3 Fu-Zhe Ma2 1Department of Andrology, 2Department of Nephrology, the First Hospital of Jilin University, 3Department of Nephrology, the Fourth Hospital of Jilin University, Changchun, China Background: Results of studies on the efficacy of atorvastatin pretreatment on reducing the prevalence of contrast-induced acute kidney injury (CIAKI in patients undergoing coronary angiography (CAG or percutaneous coronary intervention (PCI have been controversial.Objective: We undertook a meta-analysis to evaluate the efficacy of atorvastatin on contrast-induced nephropathy (CIN after CAG or PCI.Materials and methods: We undertook a systematic search of electronic databases (PubMed, Embase, and the Cochrane Library up to June 2017. A meta-analysis was carried out including randomized controlled trials (RCTs that compared atorvastatin pretreatment with pretreatment with a low-dose statin or placebo for CIAKI prevention in patients undergoing CAG. The main endpoint was CIN prevalence.Results: Nine RCTs were included in our meta-analysis. Atorvastatin pretreatment reduced the prevalence of CIN significantly (odds ratio [OR] 0.46; 95% confidence interval [95% CI] 0.27–0.79; p=0.004. The benefit of high-dose atorvastatin pretreatment was consistent when compared with the control group (OR 0.45; 95% CI 0.21–0.95; p=0.04.Conclusion: At high doses, atorvastatin pretreatment was associated with a significant reduction in the prevalence of CIAKI in patients undergoing CAG. Pretreatment with high-dose atorvastatin could be employed to prevent CIAKI. Keywords: atorvastatin, contrast-induced acute kidney injury, coronary angiography, percutaneous coronary intervention, contrast-induced nephropathy, meta-analysis

  10. Preparation, characterization, and in vitro/vivo studies of oleanolic acid-loaded lactoferrin nanoparticles

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    Xia X

    2017-05-01

    Full Text Available Xiaojing Xia,1,2 Haowei Liu,1 Huixia Lv,1 Jing Zhang,1 Jianping Zhou,1 Zhiying Zhao3 1Department of Pharmaceutics, China Pharmaceutical University, Nanjing, 2Department of Pharmaceutics, ZheJiang Pharmaceutical College, Ningbo, 3Department of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing, People’s Republic of China Abstract: Oleanolic acid (OA, a pentacyclic triterpene, is used to safely and economically treat hepatopathy. However, OA, a Biopharmaceutics Classification System IV category drug, has low bioavailability owing to low solubility (<1 µg/mL and biomembrane permeability. We developed a novel OA nanoparticle (OA-NP-loaded lactoferrin (Lf nanodelivery system with enhanced in vitro OA dissolution and improved oral absorption and bioavailability. The OA-NPs were prepared using NP albumin-bound technology and characterized using dynamic light scattering, scanning electron microscopy, X-ray powder diffraction, differential scanning calorimetry, and in vitro dissolution test. The in vivo pharmacokinetics was investigated in Sprague Dawley rats using liquid chromatography-tandem mass spectrometry. OA-NPs (OA:Lf =1:6, w/w% exhibited spherical morphology, 202.2±8.3 nm particle size, +(27.1±0.32 mV ζ potential, 92.59%±3.24% encapsulation efficiency, and desirable in vitro release profiles. An effective in vivo bioavailability (340.59% was achieved compared to the free drug following oral administration to rats. The Lf novel nanodelivery vehicle enhanced the dissolution rate, intestinal absorption, and bioavailability of OA. These results demonstrate that Lf NPs are a new strategy for improving oral absorption and bioavailability of poorly soluble and poorly absorbed drugs. Keywords: oleanolic acid, nanoparticle, lactoferrin nanodelivery system, drug absorption, bioavailability

  11. Portulaca oleracea L. alleviates liver injury in streptozotocin-induced diabetic mice

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    Zheng G

    2017-12-01

    Full Text Available Guoyin Zheng,1,* Fengfeng Mo,2,* Chen Ling,3,* Hao Peng,1 Wei Gu,1 Min Li,2 Zhe Chen1 1Department of Traditional Chinese Medicine, Changhai Hospital, 2Department of Military Hygiene, Second Military Medical University, 3Department of Biology, School of Life Science, Fudan University, Shanghai, People’s Republic of China *These authors contributed equally to this work Abstract: Purslane is a widespread succulent herb that exhibits various pharmacological effects. The purpose of this study was to evaluate the protective effect of Portulaca oleracea L. (purslane on streptozotocin-induced diabetes in mice. Oral glucose-tolerance tests were carried out to assess blood glucose levels and body weight and food intake were recorded. The biochemical parameters anti-aspartate aminotransferase, alanine aminotransferase, insulin, triglycerides, total cholesterol, IL-6, IL-1β, and TNFα were also measured. The pathological condition of liver tissues were examined by hematoxylin–eosin staining. Rho, ROCK1, ROCK2, NFκBp65, p-NFκBp65, IκBα, and p-IκBα expression in liver tissue were analyzed by Western blot. Purslane increased body weight and decreased food intake. Purslane also significantly reduced concentrations of glucose, anti-aspartate aminotransferase, alanine ­aminotransferase, triglycerides, total cholesterol, IL-6, IL-1β, and TNFα in serum. Serum insulin was elevated with purslane treatment. In addition, pathologic liver changes in diabetic mice were also alleviated by purslane. Obtained data revealed that purslane restored the levels of Rho–NFκB signaling-related proteins in comparison with those of diabetic mice. Above all, it can be assumed that purslane might play a positive role in regulating streptozotocin-induced liver injury through suppressing the Rho–NFκB pathway. Keywords: Portulaca oleracea L., diabetes, liver injury, Rho–NFκB

  12. Efficacy and safety of icotinib as first-line therapy in patients with advanced non-small-cell lung cancer

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    Shen YW

    2016-02-01

    Full Text Available Yan-Wei Shen,* Xiao-Man Zhang,* Shu-Ting Li, Meng Lv, Jiao Yang, Fan Wang, Zhe-Ling Chen, Bi-Yuan Wang, Pan Li, Ling Chen, Jin Yang Department of Medical Oncology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, People’s Republic of China *These authors contributed equally to this work Background and objective: Several clinical trials have proven that icotinib hydrochloride, a novel epidermal growth factor receptor (EGFR–tyrosine kinase inhibitor, exhibits encouraging efficacy and tolerability in patients with advanced non-small-cell lung cancer (NSCLC who failed previous chemotherapy. This study was performed to assess the efficacy and toxicity of icotinib as first-line therapy for patients with advanced pulmonary adenocarcinoma with EGFR-sensitive mutation.Patients and methods: Thirty-five patients with advanced NSCLC with EGFR-sensitive mutation who were sequentially admitted to the First Affiliated Hospital of Xi’an Jiaotong University from March 2012 to March 2014 were enrolled into our retrospective research. All patients were administered icotinib as first-line treatment. The tumor responses were evaluated using Response Evaluation Criteria in Solid Tumors (RECIST, version 1.1.Results: Among the 35 patients, the tumor objective response rate (ORR and disease control rate were 62.9% (22/35 and 88.6% (31/35, respectively. The median progression-free survival was 11.0 months (95% confidence interval [CI]: 10.2–11.8 months, and median overall survival was 21.0 months (95% CI: 20.1–21.9 months. The most common drug-related toxicities were rashes (eleven patients and diarrhea (nine patients, but these were generally manageable and reversible.Conclusion: Icotinib monotherapy is effective and tolerable as first-line treatment for patients with advanced lung adenocarcinoma with EGFR-sensitive mutation. Keywords: lung neoplasms, icotinib hydrochloride, first-line treatment

  13. Identifying candidate agents for lung adenocarcinoma by walking the human interactome

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    Sun Y

    2016-09-01

    Full Text Available Yajiao Sun,1 Ranran Zhang,2 Zhe Jiang,1 Rongyao Xia,1 Jingwen Zhang,1 Jing Liu,1 Fuhui Chen1 1Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University, 2Department of Respiratory, Harbin First Hospital, Harbin, People’s Republic of China Abstract: Despite recent advances in therapeutic strategies for lung cancer, mortality is still increasing. Therefore, there is an urgent need to identify effective novel drugs. In the present study, we implement drug repositioning for lung adenocarcinoma (LUAD by a bioinformatics method followed by experimental validation. We first identified differentially expressed genes between LUAD tissues and nontumor tissues from RNA sequencing data obtained from The Cancer Genome Atlas database. Then, candidate small molecular drugs were ranked according to the effect of their targets on differentially expressed genes of LUAD by a random walk with restart algorithm in protein–protein interaction networks. Our method identified some potentially novel agents for LUAD besides those that had been previously reported (eg, hesperidin. Finally, we experimentally verified that atracurium, one of the potential agents, could induce A549 cells death in non-small-cell lung cancer-derived A549 cells by an MTT assay, acridine orange and ethidium bromide staining, and electron microscopy. Furthermore, Western blot assays demonstrated that atracurium upregulated the proapoptotic Bad and Bax proteins, downregulated the antiapoptotic p-Bad and Bcl-2 proteins, and enhanced caspase-3 activity. It could also reduce the expression of p53 and p21Cip1/Waf1 in A549 cells. In brief, the candidate agents identified by our approach may provide greater insights into improving the therapeutic status of LUAD. Keywords: lung adenocarcinoma, drug repositioning, bioinformatics, protein–protein interaction network, atracurium

  14. River Network Reorganization along the Upper Yangzte, Eastern Tibet: Insights from Thermochronology and Sedimentology.

    Science.gov (United States)

    Gourbet, L.; Yang, R.; Fellin, M. G.; Maden, C.; Gong, J.; Jean-Louis, P.

    2017-12-01

    The high relief and high elevation of the southeastern margin of the Tibetan Plateau are related to tectonic uplift and the fluvial incision of the Salween, Mekong, and Yangtze rivers. The upper Yangtze is the subject of numerous debates on the evolution of its drainage area, particularly in regards to the timing and geodynamic processes, and therefore has an impact on models of the Tibetan plateau evolution. Today, portions of the course of the Yangtze are controlled by active strike-slip faults. In order to study the evolution of the Cenozoic paleoriver network, we use low-temperature thermochronometry to estimate fluvial incision and palaeoenvironmental information derived from the detrital record. The Jianchuan basin, between the Yangtze and the Red River, contains late Eocene fluvial sediments that may correspond to an ancient connection between these rivers. Sediments located further north (DongWang formation, Yunnan-Sichuan boundary) consist of unsorted conglomerates and sandstones. They are exposed on the flanks of deep valleys. These sediments do not correspond to a large riverbed such as the Yangtze but rather indicate an episode of intense sedimentation with a significant contribution from talus, followed by a >1.2 km incision by a tributary of the upper Yangtze. In the same area, we performed apatite and zircon (U-Th)/He dating on a granitic pluton that is offset by an active sinistral strike-slip fault. Mean ZHe cooling ages range from 50 to 70 Ma. Samples located above 3870 m yield mean apatite (U-Th)/He ages ranging from 30 to 40 Ma. AHe ages for samples at lower elevation range from 8 to 15 Ma. Given the crystallization age of the pluton (83 Ma, U/Pb, zircon), cooling ages reflect exhumation, not post-intrusion cooling. Further research will use thermal modeling to infer incision rates and compare results with published data.

  15. Determination of the binding mode for anti-inflammatory natural product xanthohumol with myeloid differentiation protein 2

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    Fu W

    2016-01-01

    Full Text Available Weitao Fu,1,* Lingfeng Chen,1,* Zhe Wang,1 Chengwei Zhao,1 Gaozhi Chen,1 Xing Liu,1 Yuanrong Dai,2 Yuepiao Cai,1 Chenglong Li,1,3 Jianmin Zhou,1 Guang Liang1 1Chemical Biology Research Center, School of Pharmaceutical Sciences, 2Department of Respiratory Medicine, the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China; 3Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus, OH, USA *These authors contributed equally to this work Abstract: It is recognized that myeloid differentiation protein 2 (MD-2, a coreceptor of toll-like receptor 4 (TLR4 for innate immunity, plays an essential role in activation of the lipopolysaccharide signaling pathway. MD-2 is known as a neoteric and suitable therapeutical target. Therefore, there is great interest in the development of a potent MD-2 inhibitor for anti-inflammatory therapeutics. Several studies have reported that xanthohumol (XN, an anti-inflammatory natural product from hops and beer, can block the TLR4 signaling by binding to MD-2 directly. However, the interaction between MD-2 and XN remains unknown. Herein, our work aims at characterizing interactions between MD-2 and XN. Using a combination of experimental and theoretical modeling analysis, we found that XN can embed into the hydrophobic pocket of MD-2 and form two stable hydrogen bonds with residues ARG-90 and TYR-102 of MD-2. Moreover, we confirmed that ARG-90 and TYR-102 were two necessary residues during the recognition process of XN binding to MD-2. Results from this study identified the atomic interactions between the MD-2 and XN, which will contribute to future structural design of novel MD-2-targeting molecules for the treatment of inflammatory diseases. Keywords: myeloid differentiation 2, xanthohumol, binding mode, inflammation, molecular dynamics simulation 

  16. Heavy metal pollution in reservoirs in the hilly area of southern China: Distribution, source apportionment and health risk assessment.

    Science.gov (United States)

    Wang, Xiaolong; Zhang, Lu; Zhao, Zhonghua; Cai, Yongjiu

    2018-09-01

    Reservoirs play more and more important role in providing potable water in many developing countries, including the China. In the present study, pollution characteristics, source and health risk of dissolved heavy metals in 19 representative reservoirs in the hilly area of southern China were investigated. The results presented great spatial heterogeneity in heavy metal concentrations among the studied reservoirs due to the disturbances by different anthropogenic activities. Several reservoirs had significantly higher concentrations of heavy metals compared with others, FengTan (FT) reservoir (0.34μg/L in dry season), Cr in reservoirs of HuangShi (HS) and ZheLin (ZL) with values of 4.16μg/L and 3.45μg/L in dry season respectively, and Al in reservoirs of JiaoKou (JK), GuTian (GT) and DouShui (DS) with values of 1011μg/L, 1036μg/L and 1001μg/L in wet season, respectively. Furthermore, there was a great difference in the seasonal variation of heavy metals, especially for Al and Pb in wet season characterized with relatively high values of 643μg/L and 0.67μg/L, respectively. Accordingly, Al was identified with a great health risk to living beings in view of its mean value in wet season, which greatly exceeded the criteria for drinking water of China, WHO and US EPA. Furthermore, As might be the greatest concern of health risk in this region considering its high carcinogenic risk to the local residents around the reservoirs of OuYangHai (OYH), DS, ZhiXi (ZX) and HS. Multivariate statistical analysis suggested that there was great heterogeneity in the sources of these heavy metals in the hilly area of southern China. Therefore, specific measures, such as controls on point source pollution control and tailings, should be taken for maintaining drinking water safety and aquatic ecosystem health. Copyright © 2018 Elsevier B.V. All rights reserved.

  17. Clay mineralogy and source-to-sink transport processes of Changjiang River sediments in the estuarine and inner shelf areas of the East China Sea

    Science.gov (United States)

    Zhao, Yifei; Zou, Xinqing; Gao, Jianhua; Wang, Chenglong; Li, Yali; Yao, Yulong; Zhao, Wancang; Xu, Min

    2018-02-01

    We examined the source-to-sink sediment transport processes from the Changjiang River to the estuarine coastal shelf area by analyzing the clay mineral assemblages in suspended sediment samples from the Changjiang River catchment and surface samples from the estuarine coastal shelf area following the impoundment of the Three Gorges Dam (TGD) in 2003. The results indicate that the clay mineral compositions throughout the study area are dominated by illite, with less abundant kaolinite and chlorite and scarce smectite. The clay minerals display distinct differences in the tributaries and exhibit obvious changes in the trunk stream compared with the periods before 2003, and the source of sediment has largely shifted to the mid- to lower reaches of the river after 2003. Spatially, the clay mineral assemblages in the estuarine area define two compositionally distinct provinces. Province I covers the mud area of the Changjiang River estuary and the Zhe-Min coastal region, where sediment is primarily supplied by the Changjiang River. Province II includes part of the Changjiang River estuary and the southeastern portion of the study area, where the sediment is composed of terrestrial material from the Changjiang River and re-suspended material from the Huanghe River carried by the Jiangsu coastal current. Moreover, the other smaller rivers in China (including the Oujiang and Minjiang rivers of mainland China and the rivers of West Taiwan) also contribut sediments to the estuarine and inner shelf areas. In general, the clay mineral assemblages in the Changjiang River estuarine area are have mainly been controlled by sediment supplied from upstream of the Changjiang River tributaries. However, since the completion of the TGD in 2003, the mid- to downstream tributaries have become the main source of sediments from the Changjiang catchment into the East China Sea. These analyses further demonstrate that the coastal currents and the decrease in the sediment load of the river

  18. Clay mineralogy indicates the muddy sediment provenance in the estuarine-inner shelf of the East China Sea

    Science.gov (United States)

    Zhao, Yifei; Zou, Xinqing; Liu, Qing; Wang, Chenglong; Ge, Chendong; Xu, Min

    2018-02-01

    The estuarine-inner shelf mud regions of the East China Sea (ECS) are valuable for studying the source-to-sink processes of fluvial sediments deposited since the Holocene. In this study, we present evidence of the provenance and environmental evolution of two cores (S5-2 and JC07) from the estuarine-inner shelf regions of the ECS over the past 100 years based on 210Pb dating, high-resolution grain size measurements and clay mineral analyses. The results indicate that the clay mineral assemblages of cores S5-2 and JC07 are dominated by illite, followed by kaolinite and chlorite, and present scarce amounts of smectite. A comparison of these clay mineral assemblages with several major sources reveals that the fine sediments on the estuarine-inner shelf of the ECS represent a mixture of provenances associated with the Yangtze and Yellow Rivers, as well as smaller rivers. However, the contribution of each provenance has varied greatly over the past hundred years, as indicated by the down-core variability due to strong sediment reworking and transport on the inner shelf and the reduction of the sediment load from the Yangtze River basin. In the mud region of the Yangtze River estuary, the sediment from 1930 to 1956 was primarily derived from the Yangtze River, although the Yellow River was also an important influence. From 1956 to 2013, the Yellow River contribution decreased, whereas the Yangtze River contribution correspondingly increased. In the Zhe-Min mud region, the Yangtze River contributed more sediment than did other rivers from 1910 to 1950; however, the Yangtze River contribution gradually decreased from 1950 to 2013. Moreover, the other small rivers accounted for minor contributions, and the East Asian winter monsoon (EAWM) played an important role in the sediment transport process in the ECS. Our results indicate that the weakening/strengthening of the EAWM and a decrease in the sediment load of the Yangtze River influenced the transport and fate of sediment

  19. Organ Visualization by Photoscanning Using Micro- and Macro-Aggregates of Radioalbumin; Examen d'Organes par Photoscintigraphie (avec des Micro-Agglomerats et des Macroagglomerats de Radioalbumine); Vizualizatsiya organov putem fotoskennirovaniya; Visualizacion de Organos por Fotoexploracion (Empleo de Micro y Macroagregados de Radioalbumina)

    Energy Technology Data Exchange (ETDEWEB)

    Taplin, G. V.; Johnson, D. E.; Dore, E. K.; Kaplan, H. S. [School of Medicine, University of California, Los Angeles (United States); Los Alamos County Harbor General Hospital, Torrance, CA (United States)

    1964-10-15

    'bumina syvorotki chelovecheskoj krovi,mechenogo jodom-131,javljaetsja nailuchshim indikatorom dlja fotoskennirovanija pecheni i selezenki. Doza obluchenija jetih organov minimal'na, a prigotovlenie indikatora otnositel'no legko i prosto. S pomoshh'ju jetogo zhe veshhestva mozhno poluchit' otchetlivoe vizual'noe predstavlenie o serdce, zheludke i sljunnyh zhelezah. Opisyvajutsja metody i fiziologicheskie osnovy poluchenija i tolkovanija skennogramm jetih organov. Illjustriruetsja ih znachenie dlja postanovki diagnoza. Fiziologicheskie osnovy primenenija al'bumina v vide makrochastic (1-10 mk) dlja vizualizacii legkih pokazany na primere tipichnyh skennogramm sobak. Toksikologicheskoe izuchenie i sootvetstvujushhie patofiziologicheskie issledovanija na zhivotnyh pokazyvajut nalichie shirokih granic bezopasnosti, pozvoljajushhih primenjat' indikatory, sostojashhie iz krupnyh chastic, dlja skennirovanija u ljudej. Predvaritel'nye jeksperimenty na sobakah pokazali vozmozhnost' skennirovanija legkih posle vdyhanija ajerozolej jetogo zhe veshhestva. Jetot metod javljaetsja prostym, bezboleznennym i sovershenno bezopasnym. Budut predstavleny fotosken- nogrammy bol'nyh s raznoobraznymi legochnymi zabolevanijami. (author)

  20. Cross-cultural validation of the educational needs assessment tool into Chinese for use in severe knee osteoarthritis

    Directory of Open Access Journals (Sweden)

    Zhao H

    2018-05-01

    Full Text Available Huiwen Zhao,1,* Zhe Dong,2,* Fei Xie,3,4 Guanxin Wang,2 Zhihua Wen,5 Lixia Zhang,5 Mwidimi Ndosi,6,7 Wen Luo1 1Joint Department, The 2nd Ward of Joint Surgery, Tianjin Hospital, Tianjin, China; 2Medical Examination Center, No 6 Hospital, Beijing, China; 3Nursing Experimental Teaching Center, Tianjin Hospital, Tianjin, China; 4College of Nursing, Tianjin University of Traditional Chinese Medicine, Tianjin, China; 5Joint Department, The 1st Ward of Joint Surgery, Tianjin Hospital, Tianjin, China; 6Department of Nursing, University of the West of England, Bristol, UK; 7Academic Rheumatology Unit, Bristol Teaching Hospitals, Bristol, UK *These authors contributed equally to this work Background: Patient education is an integral part of the management of osteoarthritis. The educational needs assessment tool (ENAT was developed in the UK to help direct needs-based patient education in rheumatic diseases. Aim: The aim of the study was to adapt and validate the ENAT into Chinese, for use in severe knee osteoarthritis (KOA. Methods: This cross-cultural validation study took two phases: 1 adaptation of the ENAT into Chinese (CENAT and 2 validation of the CENAT. The Construct validity was determined using factor analysis and criterion-related validity by comparing data from CENAT with data from different self-efficacy scales: patient–physician interactions scale (PEPPI-10, self-efficacy for rehabilitation outcome scale (SER, and the self-efficacy for exercise scale (SEE. Results: The sample comprised 196 patients, with mean age 63.6±8.7 years, disease duration was 11.5 years, and 57.1% were female. The CENAT was found to have high internal consistency. The CENAT had weak correlations with the Chinese versions of PEPPI r=0.40, SER r=0.40, and SEE r=0.39. There were no correlations with age r=-0.03 or disease duration r=-0.11. Conclusion: The ENAT translated well into Chinese and has evidence of validity in KOA. Future studies will further inform its

  1. Power, identity and antiquarian approaches in modern Chinese art’

    Directory of Open Access Journals (Sweden)

    Chia-Ling Yang

    2014-06-01

    Full Text Available The pursuit of antiquity was important for scholarly artists in constructing their knowledge of history and cultural identity in late Imperial China. Following various publications by Bi Yuan 畢沅 (1730-1797, Wu Yi 武億 (1745-1799 and Qian Daxin 錢大昕 (1728-1804 in the 18th century, the study and collecting of rubbings of Northern Wei stone inscriptions and steles was popular. Such spread of interest in jinshi, inscriptions on metal and stone, also formed a base for studying seal carving, epigraphy and archaic painting. While traditional antiquarians would cherish inscriptions which enabled them to correct mistakes in the transmitted historical texts and the Classics, however, much of the antiquarian activity was adapted to mere literary exercise or connoisseurship, for instance, to supplying materials which could provide models for seal-carving and calligraphy. Examples could be seen in the calligraphy works and seal carvings of the Xiling bajia 西泠八家 (Eight Masters of Xiling, i.e. Hangzhou, also known as Zhe School of Calligraphy and Carving. Their keen interest in seeking inspiration from steles for their artistic presentations has been recorded in their writing and painting. In addition, the way the scholar-collector of the 19th and early 20th centuries mounted the rubbings, seals, inscriptions, paintings, letters and textual evidence studies into one album shows a changing ideology: rubbings were not only for scholarly study in classical learning, but were regarded as part of the art form and were appreciated on various social occasions. The antiquarian movement ultimately served as a tool for re-writing art historiography in modern China. This paper aims to address the phenomenon and formation of the jinshi painting that dominated in late Imperial and early modern China. Through case studies of three important jinshi societies in Shanghai, I will investigate in what way literary taste from the southern region gradually

  2. Accurate reporting of adherence to inhaled therapies in adults with cystic fibrosis: methods to calculate normative adherence

    Directory of Open Access Journals (Sweden)

    Hoo ZH

    2016-05-01

    Full Text Available Zhe Hui Hoo,1,2 Rachael Curley,1,2 Michael J Campbell,1 Stephen J Walters,1 Daniel Hind,3 Martin J Wildman1,2 1School of Health and Related Research (ScHARR, University of Sheffield, 2Sheffield Adult Cystic Fibrosis Centre, Northern General Hospital, 3Sheffield Clinical Trials Research Unit, University of Sheffield, Sheffield, UK Background: Preventative inhaled treatments in cystic fibrosis will only be effective in maintaining lung health if used appropriately. An accurate adherence index should therefore reflect treatment effectiveness, but the standard method of reporting adherence, that is, as a percentage of the agreed regimen between clinicians and people with cystic fibrosis, does not account for the appropriateness of the treatment regimen. We describe two different indices of inhaled therapy adherence for adults with cystic fibrosis which take into account effectiveness, that is, “simple” and “sophisticated” normative adherence. Methods to calculate normative adherence: Denominator adjustment involves fixing a minimum appropriate value based on the recommended therapy given a person’s characteristics. For simple normative adherence, the denominator is determined by the person’s Pseudomonas status. For sophisticated normative adherence, the denominator is determined by the person’s Pseudomonas status and history of pulmonary exacerbations over the previous year. Numerator adjustment involves capping the daily maximum inhaled therapy use at 100% so that medication overuse does not artificially inflate the adherence level. Three illustrative cases: Case A is an example of inhaled therapy under prescription based on Pseudomonas status resulting in lower simple normative adherence compared to unadjusted adherence. Case B is an example of inhaled therapy under-prescription based on previous exacerbation history resulting in lower sophisticated normative adherence compared to unadjusted adherence and simple normative adherence

  3. Syringomyelia presenting with unilateral optic neuropathy: a case report

    Directory of Open Access Journals (Sweden)

    Ngoo QZ

    2017-03-01

    Full Text Available Qi Zhe Ngoo, Evelyn Li Min Tai, Wan Hazabbah Wan Hitam Department of Ophthalmology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia Purpose: In this case report, we present two cases of syringomyelia with optic neuropathy.Findings: In Case 1, a 36-year-old Malay lady presented to our clinic with acute onset of blurring of vision in her left eye that she experienced since past 1 month. She was diagnosed with syringomyelia 12 years ago and was on conservative management. Her visual acuity was 6/6 in the right eye and counting fingers at 1 m in the left. There was a positive relative afferent pupillary defect in her left eye. Optic nerve functions of her left eye were reduced. Visual field showed a left inferior field defect. Her extraocular muscle movements were full. Magnetic resonance imaging of the brain and spine showed syringomyelia at the level of C2–C6 and T2–T9. Both of her optic nerves were normal. Her condition improved with intravenous and oral corticosteroids. In Case 2, a 44-year-old Malay lady presented to our clinic with a progressive central scotoma in her right eye that she experienced since past 1 month. She had previous history of recurrent episodes of weakness in both of her lower limbs from past 8 months. Visual acuity in her right and left eye was 6/9 and 6/6, respectively. The relative afferent pupillary defect in her right eye was positive. Optic nerve functions of her right eye were affected. Visual field showed a central scotoma in her right eye. Her extraocular muscle movements were full. Fundoscopy of her right eye showed a pale optic disc. Her left eye fundus was normal. Magnetic resonance imaging of the brain and spine showed syringomyelia at T3–T6. Both of her optic nerves were normal. A diagnosis of syringomyelia with right optic atrophy was performed. Her condition improved with intravenous and oral corticosteroids.Conclusion: Optic neuropathy is a rare neuro

  4. Clinical and radiological characteristics of central pulmonary adenocarcinoma: a comparison with central squamous cell carcinoma and small cell lung cancer and the impact on treatment response

    Directory of Open Access Journals (Sweden)

    Wang Z

    2018-05-01

    Full Text Available Zhe Wang,1,2 Minghuan Li,2 Yong Huang,3 Li Ma,3 Hui Zhu,2 Li Kong,2 Jinming Yu2 1School of Medicine, Shandong University, Jinan, Shandong, China; 2Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan, Shandong, China; 3Department of Radiology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan, Shandong, China Purpose: The proportion of central pulmonary adenocarcinoma (ADC in central-type lung cancer has been gradually increasing due to the overall increasing incidence of pulmonary ADC. But the clinical and radiological characteristics of central ADCs remain unclear. In this study, we compared the clinical and radiological characteristics of central ADCs with those of small cell lung cancers (SCLCs and squamous cell carcinomas (SQCCs and investigated the impact of these characteristics on patients’ treatment response. Patients and methods: The medical records of 302 consecutive patients with central lung cancer from July 2014 to September 2016 were retrospectively reviewed. There were 99 patients with ADC, 95 with SQCC and 108 with SCLC. Computed tomography images were interpreted by two radiologists. Treatment response was determined by Response Evaluation Criteria In Solid Tumors 1.1. Results: Univariate analyses found that younger age, female sex, no history of smoking, higher levels of carcinoembryonic antigen (CEA, contralateral hilum lymphadenopathy, contralateral lung metastasis, pleural nodules and pleural metastasis to the interlobular fissure were significantly correlated with central ADC. Multivariate logistic regression analyses revealed that compared with central SQCC, female sex, younger age, no history of smoking, higher levels of CEA and contralateral hilum lymphadenopathy were the significantly independent indicators of central pulmonary ADC. Furthermore, compared with central SCLC, younger age, higher levels of CEA and cytokeratin 19 fragment (Cyfra21-1, lower

  5. [Cervugid ovules in cervico-vaginal infections and cervix uteri precancerous conditions treatment].

    Science.gov (United States)

    Zanoschi, Ch; Anton, C; Anton, E; Costăchescu, Gh; Teleman, S; Costăchescu, G; Ciupilan, I; Cărăuleanu, M; Cărăuleanu, A; Leica, V; Pânzaru, C; Grigore, M; Merticaru, I; Huianu, O; Huianu, L; Chifan, M

    2004-01-01

    This medicine was authorized by the National Drug Agency (ANM, Bucureşti) in 2001. To evaluate the effectiveness and the tolerance to Cervugid-ovules, a preparation that combines the polyvalent local antiinflammatory action of chloramphenicol, metronidazole and nystatin with the effect of hydrocortisone acetate, an unspecific anti-inflammatory agent; they all are embedded in a Lipex-403, semisynthetic fat. The evaluation of 500 patients ages between 15 and 85 years with genital infections, registered in the files of "Cl. II Obst. and Gynecology" of the Cuza-Vodă Hospital from Iaşi has been studied. We studied the subjective manifestations (local discomfort and pelvic pains, local burning and dryness,vulvovaginal itching and dyspareunia) and objective manifestations (vaginal and cervical secretion, the cytotest performed and colored though the Papanicolaou method and reported in the Bethesda system). Healing of the subjective symptoms in 98%, healing of the leukorrhea--as a main objective symptom--in 95%; The Bethesda system cytotest was one of the inflammatory type in the most of the cases and there wew found in 85 cases: 6 ASCUS, 41 LSIL, and 37 HSIL. The use of Cervugid had a healing response in most of the cases when used in acute and chronic cervico-vaginal inflammatory processes. Cervugid may be considered as an important agent in the treatment of the precancerous affections af the cervix uteri on the following reasons: zhe cure of the infections caused by chlamydia, involved in the etiology of cervical neoplasms, the cure of the HPV infection under episome form, classified in the Bethesda system within the ASCUS, AGUS or LSIL classes. When the cytotest was in the HSIL class, a conization in the LLETZ method was performed. Cervugid is conceived for those three main categories of pathogenic factors related to the etiology of cervico-vaginitis: microbia germs, protozoa and mycosis. In addition, it is active on chlamydia and mycoplasms, always sensitive to

  6. Comparison of the short-term efficacy between docetaxel plus carboplatin and 5-fluorouracil plus carboplatin in locoregionally advanced nasopharyngeal carcinoma

    Directory of Open Access Journals (Sweden)

    Lv X

    2016-08-01

    Full Text Available Xing Lv,1,2,* Wei-Xiong Xia,1,2,* Liang-Ru Ke,1,2 Jing Yang,1,2 Wen-Zhe Qiu,1,2 Ya-Hui Yu,1,2 Hu Liang,1,2 Xin-Jun Huang,1,2 Guo-Yin Liu,1,2 Qi Zeng,1,2 Xiang Guo,1,2 Yan-Qun Xiang1,2 1Key Laboratory of Oncology in South China, 2Department of Nasopharyngeal Carcinoma, Sun Yat-sen University Cancer Center, Guangzhou, People’s Republic of China *These authors contributed equally to this work Objective: Platinum-based chemotherapy in combination with radiotherapy is a standard treatment strategy for locoregionally advanced nasopharyngeal carcinoma (NPC. This study aimed to investigate the long-term efficacy and tolerability of inductive chemotherapy with docetaxel plus carboplatin (TC or 5-fluorouracil plus carboplatin (FC followed by concurrent radiation therapy in patients with NPC. Methods: Patients (N=88 were randomized to receive TC or FC as inductive therapy followed by concurrent radiotherapy (60–70 Gy with two cycles of carboplatin (area under the curve =5 mg·h/L. Patients were followed up for 8 years. Primary end point was progression-free survival (PFS. Secondary end points included overall survival (OS, toxicity, tumor response, distant metastasis-free survival, and local recurrence-free survival. Results: At the end of the follow-up period, 31 patients died, 32 had disease progression, eleven had cancer recurrence, and 25 had distant metastasis. Overall, there was no difference between treatment groups with regard to response or survival. We found that following induction and concurrent chemoradiotherapy, the majority of patients showed a complete response (~96%–98% for induction therapy and 82%–84% for comprehensive therapy to both therapies. PFS and OS were also similar between groups. The rate of PFS was 63.6% for both FC and TC and that of OS was 65.9% and 63.5%, respectively. The overall incidence of grade 3–4 adverse events in the TC group (20.5% was higher than in the FC group (10.7%. Neutropenia and leukopenia

  7. Vancomycin-modified Fe3O4@SiO2@Ag microflowers as effective antimicrobial agents

    Directory of Open Access Journals (Sweden)

    Wang C

    2017-04-01

    Full Text Available Chongwen Wang,1,2,* Kehan Zhang,2,* Zhe Zhou,2,* Qingjun Li,2 Liting Shao,2 Rong Zhang Hao,3 Rui Xiao,2 Shengqi Wang1,2 1College of Life Sciences & Bio-Engineering, Beijing University of Technology, 2Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing Institute of Radiation Medicine, Beijing, 3Institute for Disease Control and Prevention, Academy of Military Medical Sciences, Beijing, People’s Republic of China *These authors contributed equally to this work Abstract: Nanomaterials combined with antibiotics exhibit synergistic effects and have gained increasing interest as promising antimicrobial agents. In this study, vancomycin-modified magnetic-based silver microflowers (Van/Fe3O4@SiO2@Ag microflowers were rationally designed and prepared to achieve strong bactericidal ability, a wide antimicrobial spectrum, and good recyclability. High-performance Fe3O4@SiO2@Ag microflowers served as a multifunction-supporting matrix and exhibited sufficient magnetic response property due to their 200 nm Fe3O4 core. The microflowers also possessed a highly branched flower-like Ag shell that provided a large surface area for effective Ag ion release and bacterial contact. The modified-vancomycin layer was effectively bound to the cell wall of bacteria to increase the permeability of the cell membrane and facilitate the entry of the Ag ions into the bacterium, resulting in cell death. As such, the fabricated Van/Fe3O4@SiO2@Ag microflowers were predicted to be an effective and environment-friendly antibacterial agent. This hypothesis was verified through sterilization of Gram-negative Escherichia coli and Gram-positive methicillin-resistant Staphylococcus aureus, with minimum inhibitory concentrations of 10 and 20 µg mL-1, respectively. The microflowers also showed enhanced effect compared with bare Fe3O4@SiO2@Ag microflowers and free-form vancomycin, confirming the synergistic effects of the combination of the

  8. Difference in Injury Mode, Dose-Rate Dependence and RBE of 730-Mev Protons, 100-KVp X-Rays and 250-KVp X-Rays; Differences dans le Type de Lesion, l'Importance du Debit de Dose et l'EBR entre les Protons de 730 Mev, les Rayons X de 100 Kv-Crete et les Rayons X de 250 Kv-Crete; Razlichiya kharaktera porazheniya, zavisimosti ot moshchnosti dozy i obeh protonov s ehnergiej 730 mehv i rentgenovskikh luchej s pikovym napryazheniem 100 i 250 kv; Diferencias en la Modalidad de La Lesion, la Relacion con la Intensidad de Dosis y la EBR de los Protones de 730 Mev, y los Rayos X de 100 Kvp Y de 250 Kvp

    Energy Technology Data Exchange (ETDEWEB)

    Sondhaus, C. A.; Wallace, R. W.; Lyman, J. T.; Kase, K. W.; Steward, P. G. [University of California Lawrence Radiation Laboratory Berkeley (United States)

    1964-03-15

    pogibali na 12 -14-j den' v rezul'tate gemopojeticheskih narushenij, prichem obnaruzhena takaja zhe zavisimost' ot moshhnosti dozy. OBJe protonov po sravneniju s rentgenovskimi luchami s pikovym naprjazheniem 250 kv dlja LD{sub 50} k 30-mu dnju ravnjalas' 0,8; OBJe dlja LD{sub 50} k shestomu dnju ravnjalas' 1,2 pri toj zhe moshhnosti dozy 100 rad/min. Predpolagaetsja, chto razlichija v haraktere porazhenija mogu t byt' svjazany s neodinakovym raspredeleniem tkanevoj dozy. Bolee vysokaja, no izmenjajushhajasja OBJe protonov v otnoshenii kishechnoj smerti na shestoj den', ochevidno, javljaetsja projavleniem jeffekta moshhnosti dozy. Obsuzhdaetsja prakticheskoe znachenie faktorov raspredelenija dozy i ee moshhnosti. (author)

  9. Targeting bladder tumor cells in voided urine of Chinese patients with FITC-CSNRDARRC peptide ligand

    Directory of Open Access Journals (Sweden)

    Jia XY

    2012-05-01

    Full Text Available Xing-You Jia1, Qi Yu2, Zhe-Hui Zhang3, Xiao-Feng Yang11School of the First Clinical Hospital, Shanxi Medical University, Taiyuan, Shanxi, China; 2Department of Information Management, Shanxi Medical University, Taiyuan, Shanxi, China; 3Research Center for Philosophy of Science and Technology, Shanxi University, Taiyuan, Shanxi, ChinaObjective: To study the practicality of the FITC-CSNRDARRC peptide ligand (containing the Cys–Ser–Asn–Arg–Asp–Ala–Arg–Arg–Cys nonapeptide in diagnosing and monitoring bladder tumors.Materials and methods: Between March 2011 and September 2011, 80 consecutive patients with radiographic abnormalities, localizing hematuria, other symptoms, or signs were studied using the FITC-CSNRDARRC ligand, urinary cytology (UC, and fluorescence in situ hybridization (FISH. The sensitivity and specificity of these three technologies were determined and compared. Cystoscopy and tissue biopsy were taken as the “gold standards” for bladder tumor diagnosis in this study.Results: Twenty-nine out of 80 patients were diagnosed with a bladder tumor via histopathological examination. The FITC-CSNRDARRC ligand was positive in 23 out of 29 bladder tumor patients and produced false negatives in six (20.69% patients. The UC was positive in six out of 29 bladder tumor patients and produced false negatives in 23 (79.31% patients. The FISH was positive in 21 out of 29 bladder tumor patients and produced false negatives in eight (27.59% patients. The overall sensitivity as verified by the FITC-CSNRDARRC ligand was much higher than in UC (79.31% versus 20.69%, P < 0.001 and was slightly higher than in FISH (79.31% versus 72.41%, P = 0.625. The sensitivity of FISH was significantly higher than that of UC (72.41% versus 20.69%, P < 0.001. Sensitivities of the FITC-CSNRDARRC ligand and UC by grade were 58.33% versus 8.3% for low-grade (LG tumors (P = 0.031 and 94.12% versus 29.41% for high-grade (HG tumors (P = 0.003, respectively

  10. The efficiency and safety of trastuzumab and lapatinib added to neoadjuvant chemotherapy in Her2-positive breast cancer patients: a randomized meta-analysis

    Directory of Open Access Journals (Sweden)

    Chen ZL

    2016-05-01

    Full Text Available Zhe-Ling Chen, Yan-Wei Shen, Shu-Ting Li, Chun-Li Li, Ling-Xiao Zhang, Jiao Yang, Meng Lv, Ya-Yun Lin, Xin Wang, Jin Yang Department of Medical Oncology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, People’s Republic of China Background: The addition of human epidermal growth factor receptor 2 (Her2 therapies to neoadjuvant chemotherapy (NAC during treatment of Her2-positive breast cancer has been proposed as an effective way to improve the prognosis. However, the treatment outcomes of adding trastuzumab, lapatinib, or both to NAC were not unequivocal in randomized clinical trials. Based on these data, a meta-analysis was performed. Objective: The main objective was to evaluate the efficiency and safety of trastuzumab and lapatinib added to NAC for treatment of Her2-positive breast cancer. Methods: ClinicalTrials.gov and PubMed were searched for randomized clinical trials that compared trastuzumab, lapatinib, or both, added to NAC. The main endpoint was a pathologically complete response (pCR rate, in breast only or in breast and lymph nodes. The drug safety and the influence of hormone-receptor status, comparing the clinical response and the rate of breast conservation, were evaluated. Results: A total of eight publications were included in the primary analysis, designed as two or three subgroups. The cumulative cases were 2,349 and the analyses of all the clinical trials showed that the pCR rate was significantly higher in the group receiving trastuzumab than that in the group with lapatinib, either in breast only (P=0.001 or in breast and lymph nodes (P=0.0001. Similar results could be seen in comparisons of the combination versus trastuzumab group. Further studies of subgroups divided into hormone receptor-positive or-negative patients showed that the addition of trastuzumab or dual Her2-targeted therapy significantly improved the pCR rate in patients who were hormone-insensitive. Regarding the toxic

  11. Provenance of the lower Miocene of the Gulf of Mexico from detrital zircon double dating

    Science.gov (United States)

    xu, J.

    2013-12-01

    The lower Miocene interval of the Gulf of Mexico (GOM) has recently gained increasing attention from oil and gas industry due to its hydrocarbon potential below the salt canopy. However, it has been less well studied than both the underlying Oligocene and overlying middle Miocene strata. The lower Miocene worldwide is a transitional period of tectonic, climatic, and oceanographic change. In particular, it is a period of major tectonic reorganization in the western interior of North America (Rocky Mountains), involving a shift from the Oligocene thermal phase, with abundant volcanic activity recorded in the thick Frio/Vicksburg succession of the GOM, to the Miocene Basin-Range extensional phase. Climatic conditions also changed from a relatively arid Oligocene to wetter Miocene, resulting in increased sediment yields from exhumed tectonic structures. Previous provenance studies used proportions of quartz, feldspar and lithic fragments and consideration of likely river courses through known paleogeomorphological elements. Only limited detrital zircon (DZ) U-Pb studies on Paleocene strata have been undertaken and there has been no previous U-Pb and (U-Th)/He double dating in the GOM. In this study we apply the latest analytical approaches, such as DZ U-Pb dating to gain robust source terranes ages and more fully elucidate the complex sediment provenance and dispersal history of GOM. We also employ DZ (U-Th)/He (ZHe) dating, combined with DZ U-Pb, to not only define sedimentary provenance but also the exhumation histories of detrital source regions. Samples of lower Miocene outcrop exposures in Texas and Louisiana have been collected to discriminate the varied tectonic and drainage system changes across the basin in lateral. In addition, samples from the Eocene, Oligocene and middle Miocene have been obtained to reveal vertical shift of source terranes contributions. Our initial age data show detrital zircons of lower Miocene sediments come from a wide range of source

  12. Cytotoxic effects of ZnO nanoparticles on mouse testicular cells

    Directory of Open Access Journals (Sweden)

    Han Z

    2016-10-01

    Full Text Available Zhe Han,1,* Qi Yan,1,* Wei Ge,2 Zhi-Guo Liu,1 Sangiliyandi Gurunathan,3 Massimo De Felici,4 Wei Shen,2 Xi-Feng Zhang1 1College of Biological and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, People’s Republic of China; 2Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, People’s Republic of China; 3Department of Stem Cell and Regenerative Biology, Konkuk University, Seoul, Republic of Korea; 4Department of Biomedicine and Prevention, University of Rome “Tor Vergata”, Rome, Italy *These authors contributed equally to this work Background: Nanoscience and nanotechnology are developing rapidly, and the applications of nanoparticles (NPs have been found in several fields. At present, NPs are widely used in traditional consumer and industrial products, however, the properties and safety of NPs are still unclear and there are concerns about their potential environmental and health effects. The aim of the present study was to investigate the potential toxicity of ZnO NPs on testicular cells using both in vitro and in vivo systems in a mouse experimental model. Methods: ZnO NPs with a crystalline size of 70 nm were characterized with various analytical techniques, including ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and atomic force microscopy. The cytotoxicity of the ZnO NPs was examined in vitro on Leydig cell and Sertoli cell lines, and in vivo on the testes of CD1 mice injected with single doses of ZnO NPs.Results: ZnO NPs were internalized by Leydig cells and Sertoli cells, and this resulted in cytotoxicity in a time- and dose-dependent manner through the induction of apoptosis. Apoptosis likely occurred as a consequence of DNA damage (detected as γ-H2AX and RAD51 foci caused by increase in reactive oxygen

  13. Consumers' Use of UMLS Concepts on Social Media: Diabetes-Related Textual Data Analysis in Blog and Social Q&A Sites.

    Science.gov (United States)

    Park, Min Sook; He, Zhe; Chen, Zhiwei; Oh, Sanghee; Bian, Jiang

    2016-11-24

    media datasets shared frequent semantic types such as "Amino Acid, Peptide, or Protein," "Body Part, Organ, or Organ Component," and "Disease or Syndrome." Although the 3 social media datasets vary greatly in size, they exhibited similar conceptual coverage among UMLS source vocabularies and the identified concepts showed similar semantic type distributions. As such, concepts that are both frequently used by consumers and also found in professional vocabularies such as SNOMED CT can be suggested to OAC CHV to improve its coverage. ©Min Sook Park, Zhe He, Zhiwei Chen, Sanghee Oh, Jiang Bian. Originally published in JMIR Medical Informatics (http://medinform.jmir.org), 24.11.2016.

  14. Review of the United States Army Wholesomeness of Irradiated Food Program (1955-1966); Apercu du Programme d'Etudes de l'Armee des Etats Unis sur la Comestibilite des Produits Alimentaires Irradies (1955-1966); Obzor programmy Amerikanskoj armii po voprosu sokhraneniya vkusovykh i pitatel'nykh'kachestv obluchennykh pishchevykh produktov (1955-1966); Programa del Ejercito de Los Estados Unidos Relativo a la Comestibilidad de los Alimentos Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Raica, N. Jr. [United States Army Medical Research And Nutrition Laboratory, Fitzsimons General Hospital, Denver, CO (United States); Howie, D. L. [United States Army Medical Research and Development Command, Office of the Surgeon General, Washington, DC (United States)

    1966-11-15

    proporcion de 32% a 100%. Se llego a las siguientes conclusiones: a) los alimentos irradiados con rayos gamma o con electrons de 10 MeV, en dosis de 5,6 Mrad como maximo, sori tan comestibles como los alimentos no irradiados; b) en general, las perdidas de vitaminas por'irradiacion son analogas a las que produce el tratamiento termico; c) en los alimentos irradiados con cobalto-60 o con electrones de 10 MeV no existe radiactividad inducida detectable; d). los alimentos irradiados son, en general, tan aceptables como los no irradiados. En vista de estas conclusiones, la autoridad competente de los Estados Unidos ha aprobado la irradiacion de los siguientes alimentos: tocino, dosis de 4,5 Mrad, cobalto-60 o electrones de 10 MeV; trigo y derivados, dosis de 50 krad, cobalto-60; patatas, dosis de 10 krad, electrones de 2 MeV; Se estan estudiando o tramitando otras autorizaciones. (author) [Russian] Armija SShA shiroko izuchala mnogie voprosy, kasajushhiesja primenenija ionizirujushhego obluchenija dlja sohranenija pishhevyh produktov. . Rassmatrivajutsja dannye, otvechajushhie na vopros o sohranenii vkusovyh i pitatel'nyh.kachestv(s tochki zrenija toksikologii, pitatel'nosti i, chastichno, mikrobiologicheskoj bezopasnosti) obluchennyh pishhevyh produktov. Bylo zaversheno izuchenie rezul'tatov dlitel'nogo kormljonija zhivotnyh i pokazano, chto obluchennye pishhevye produkt sohranjajut svoi kachestva v toj zhe stepeni, i, kak pravilo, tak zhe prjjomlemy, kak'i pishhevye produkty, obrabotannye obychnym sposobom. Dannye byli polucheny blagodarja usilijam bolee-30 universitetskih, kommercheskih i pravitel'stvennyh laboratorij i vkljuchajut v sebja rezul'taty kormlenija obluchennymi pishhevymi produktami (mjaso, ryba, frukty, juvoshhi i -dr. - vsego 21: vid) 15 000 myshej, 5000 roditel'skih pokolenij krys, 300 sobak i 37 obez'jan. Kak pravilo, produkty byli oblucheny dozami do 2,79 i 5,58 megarada. Istochnikami obluchenija sluzhili otrabotavshie toplivnye, sterzhni, ustanovki s kobal

  15. Temperature Distribution in Radioactive Solid Wastes. Part I - Beta-Active Solids; Repartition des Temperatures dans les Dechets Radioactifs Solides. Partie I - Solides Radioactifs Beta; 0420 0410 0421 041f 0420 0415 0414 ; Distribucion de la Temperatura en los Desechos Radiactivos Solidos. Parte I - Desechos Solidos Emisores de Radiaciones Beta

    Energy Technology Data Exchange (ETDEWEB)

    Kotewale, D. A.; Ganguly, A. K. [Atomic Energy Establishment, Trombay (India)

    1960-07-01

    temperatura de cualquier emisor beta de periodo largo en determinados puntos de una esfera y un cilindro de dimensiones y difusividad dadas. (author) [Russian] V jetom dokumente idet rech' o vychislenii raspredelenija temperatury v radioaktivnoj sfere i v konechnom radioaktivnom cilindre, pogruzhennom v sredu, imejushhuju te zhe teplovye svojstva. Dajutsja formuly dlja takih vychislenij. Chislovye dannye o poluchennoj temperature privodjatsja v graficheskom izobrazhenii dlja teh sluchaev, kogda aktivnost' vyzyvaetsja beta-izluchateljami, takimi kak P{sup 32}, Sr{sup 89}, Cs{sup 135} i Sr{sup 90} + (Y{sup 90}). Privodjatsja obshhie diagrammy vychislenija poluchennoj temperatury dlja ljubogo beta-izluchatelja s dlitel'nym srokom zhizni v konkretnyh tochkah kruga i cilindra opredelennyh razmerov i s opredelennym kojefficientom diffuzii. (author)

  16. A novel lipid-based nanomicelle of docetaxel: evaluation of antitumor activity and biodistribution

    Directory of Open Access Journals (Sweden)

    Ma M

    2012-07-01

    Full Text Available Mingshu Ma,1 Yanli Hao,1 Nan Liu,1 Zhe Yin,1 Lan Wang,1 Xingjie Liang,2 Xiaoning Zhang11Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Tsinghua University, Beijing, China; 2National Center for Nanoscience and Technology, Beijing, ChinaPurpose: A lipid-based, nanomicelle-loaded docetaxel (M-DOC was designed and characterized. Optical imaging was employed to evaluate the pharmacokinetics and antitumor efficacy of docetaxel in vivo.Materials and methods: The M-DOC was prepared using the emulsion-diffusion method. Transmission electron microscopy and dynamic light scattering were used to assess the morphology and particle size of the M-DOC. Critical micelle concentrations, their stability under physiological conditions, and their encapsulation efficiency – as measured by high-performance liquid chromatography – were assessed. Pharmacological features were evaluated in two different animal models by comparing M-DOC treatments with docetaxel injections (I-DOC. Bioluminescence imaging was used to assess antitumor activity and docetaxel distribution in vivo, using nude mice injected with luciferase-expressing MDA-MB-231 human breast tumor cells. In addition, animals injected with B16 melanoma cells were used to measure survival time and docetaxel distribution.Results: The M-DOC was prepared as round, uniform spheres with an effective diameter of 20.8 nm. The critical micelle concentration of the original emulsion was 0.06%. Satisfactory encapsulation efficiency (87.6% ± 3.0% and 12-hour stability were achieved. Xenograft results demonstrated that the M-DOC was more effective in inhibiting tumor growth, without significantly changing body weight. Survival was prolonged by 12.6% in the M-DOC group. Tumor growth inhibitory rates in the M-DOC and I-DOC groups were 91.2% and 57.8% in volume and 71.8% and 44.9% in weight, respectively. Optical bioluminescence imaging of tumor growths yielded similar results. Area under the

  17. Effects of Variable Dose-Rates on Radiation Damage in the Rust-Red Flour Beetle, Tribolium Castaneum Herbst; Effets du debit de dose sur les dommages radioinduits chez le tenebrion roux (Tribolium Castaneum Herbst); Vliyanie razlichnykh moshchnostej doz na radiatsionnoe povrezhdenie krasnogo muchnogo zhuka, Tribolium Castaneum (Herbst); Radio lesiones que sufre el Tribolium Castaneum Herbst cuando se le somete a dosis de radiaciones de diversas intensidades

    Energy Technology Data Exchange (ETDEWEB)

    Nair, K. K.; Subramanyam, G. [Biology Division, Atomic Energy Establishment, Trombay, Bombay (India)

    1963-09-15

    huevecillos disminuyo considerablemente al aumentar la intensidad de dosis, aunque vuelve a aumentar de manera notable cuando las intensidades de dosis alcanzan valores muy elevados. La memoria discute el significado de estos resultados. (author) [Russian] Dlya opredeleniya zavisimosti reaktsii na obluchenie ot izmeneniya moshchnosti dozy izuchalis' zhiznesposobnost' i fertil'nost' yaits, a takzhe vzroslykh osobej Tribolium castaneum posle gamma-oblucheniya pri razlichnykh moshchnostyakh doz. Ispol'zovalis' dozy v 2000 i 5000 rad, a moshchnost' doz izmenyalas' ot 126 do 140 000 rad v chas. Bylo zamecheno, chto s povysheniem moshchnosti dozy ponizhalas' fertil'nost' vzroslykh osobej. Podobnym zhe obrazom s povysheniem moshchnosti dozy znachitel'no umen'shalas' zhiznesposobnost' yaits, odnako pri ochen' bol'shikh moshchnostyakh doz zhiznesposobnost' zametno uvelichivalas'. Obsuzhdaetsya znachenie poluchennykh dannykh. (author)

  18. Determination on Mice and other Organisms of the RBE of High-Energy Protons and Electrons; Efficacite Biologique Relative sur la Souris et d'Autres Organismes des Protons et des Electrons De Haute Energie; Opredelenie obeh pri obluchenii myshej i drugikh organizmov protonami i ehlektronami vysokikh ehnergij; Determinacion de la Eficacia Biologica Relativa de los Protones y de los Electrones de Elevada Emergia en el Raton y en Otros Organismos

    Energy Technology Data Exchange (ETDEWEB)

    Bonet-Maury, P.; Baarli, J.; Kahn, T.; Dardenne, G.; Frilley, M.; Deysine, A. [Institut du Radium, Paris (France)

    1964-03-15

    {sub 50}, supervivencia media, reduccion del timo y de los testiculos) es proxima a 1; esta EBR corresponde al valor medio de la transferencia lineal de energia (TLE) de las particulas y, en el caso de los protones, no parece que sufra aumento alguno por efecto del valor local mas elevado del TLE de las 'estrellas' de espalacion. (author) [Russian] Izuchalis' obshhie jeffekty pri obluchenii myshej letal'nymi dozami protonov s jenergiej 157 i 592 Mjev i jelektronov s jenergiej 150 i 950 Mjev. {gamma} obluchennyh zhivotnyh nabljudalis te zhe obshhie simptomy, chto i posle rentgenovskogo i gamma-obluchenija. S pomoshh'ju primenennyh biologicheskih testov ne bylo o b naruzheno nikakih fenomenov, specifichnyh dlja chastic vysokih jenergij. Ustanovlennaja po chetyrem pokazateljam OBJe (LD-50, srednjaja vyzhivaemost', umen'shenie zobnoj zhelezy i semennikov) malo otklonjaetsja ot 1 ; jeta OBJe so o tvetstvue t srednej LPE chastic, i dlja protonov ne kazhetsja uvelichennoj za schet povyshenija mestnogo LPE zvezd raspada. (author). (author)

  19. Using Social Media Data to Understand the Impact of Promotional Information on Laypeople's Discussions: A Case Study of Lynch Syndrome.

    Science.gov (United States)

    Bian, Jiang; Zhao, Yunpeng; Salloum, Ramzi G; Guo, Yi; Wang, Mo; Prosperi, Mattia; Zhang, Hansi; Du, Xinsong; Ramirez-Diaz, Laura J; He, Zhe; Sun, Yuan

    2017-12-13

    .57% (2704/14,564) were classified as laypeople's discussions. The most discussed themes were treatment (n=4080) and genetic testing (n=3073). We found that the topic distributions in laypeople's discussions were similar to the distributions in promotional Lynch syndrome-related information. Furthermore, most people had a positive attitude when discussing Lynch syndrome. The proportion of negative tweets was 3.51%. Within each topic, treatment (16.67%) and genetic testing (5.60%) had more negative tweets compared with other topics. When comparing monthly trends, laypeople's discussions had a strong correlation with promotional Lynch syndrome-related information on awareness (r=.98, PLynch Syndrome Awareness Day (March 22, 2017) had significant positive impacts on laypeople's discussions and their attitudes. There is evidence that participative social media platforms, namely Twitter, offer unique opportunities to inform cancer communication surveillance and to explore the mechanisms by which these new communication media affect individual health behavior and population health. ©Jiang Bian, Yunpeng Zhao, Ramzi G Salloum, Yi Guo, Mo Wang, Mattia Prosperi, Hansi Zhang, Xinsong Du, Laura J Ramirez-Diaz, Zhe He, Yuan Sun. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 13.12.2017.

  20. Environmental Implications of Radioactive Waste Disposal as Related to Stream Environments; Incidences du Milieu sur l'Elimination des Dechets Radioactifs dans le Voisinage des Cours d'Eau; 0412 041b 0418 042f 0414 ; Efectos de la Evacuacion de Desechos Radiactivos en las Corrientes Fluviales

    Energy Technology Data Exchange (ETDEWEB)

    Straub, Conrad P.; Goldin, Abraham S.; Friend, Albert G.; Taft, Robert A. [Sanitary Engineering Center, US Department of Health, Education and Welfare, Cincinnati, OH (United States)

    1960-07-01

    hay que anadir las sustancias provenientes de la precipitacion radiactiva y las que se depositan directamente en el rio o incorporan a la corriente{sub a} traves de sus afluentes. Como las corrientes fluviales pueden utilizarse con diversos fines: para obtener agua potable, para el consumo industrial, como lugar de recreo, para la pesca, el riego o la navegacion, hay que evaluar cuidadosamente los efectos de la evacuacion en cada uno de los casos mencionados. Los criterios actualmente establecidos no proporcionan una base suficiente para determinar el limite admisible de evacuacion, a no ser que se conozcan las cantidades.de cada radionuclido ya presentes en el agua y su comportamiento al ser arrastrados por la corriente. Habra que modificar los limites admisibles de evacuacion segun estos datos y, sobre todo, segun los fines con que se utilice el rio aguas abajo del punto de descarga. Si en un rio determinado se permite la evacuacion de desechos radiactivos en diferentes puntos, habra que determinar las cantidades maximas correspondientes a cada radionuclido teniendo en cuenta la exposicion de las poblaciones situadas aguas abajo de todos los puntos de descarga. En la memoria se sugieren diversas maneras de abordar el problema de la evacuacion de desechos segun el uso que se hace de la comente aguas abajo del punto de evacuacion, y se examinan las dificultades practicas inherentes a cada una de ellas. (author) [Russian] V nastojashhee vremja ezhegodno v reki popadajut vse v bol'shem kolichestve, radioaktivnye othody. Oni idut iz mnogochislennyh laboratorij, v kotoryh ispol'zujutsja radioaktivnye materialy dlja poleznyh celej, a takzhe iz sushhestvujushhih sredstv ispol'zovanija atomnoj jenergii. K jetomu- kolichestvu, popadajushhemu neposredstvenno v reki pri uslovijah kontrolja, sleduet dobavit' eshhe i radioaktivnye materialy, kotorye javljajutsja sledstviem vypadenija i prosachivanija ili prjamye osadki, popadajushhie v reki. Poskol'ku jeti zhe reki mogut ispol

  1. Retention in Solid KIO{sub 3} Activated with Fast and Slow Neutrons; Retention dans KIO{sub 3} Solide Active par des Neutrons Rapides et des Neutrons Lents; 0423 0414 0415 0420 0416 0410 041d 0418 0415 0412 0422 0412 0415 0420 0414 041e 041c KIO{sub 3}, 0410 041a 0422 0418 0412 0418 0420 041e 0412 0410 041d 041d 041e 041c 0411 042b 0421 0422 0420 042b 041c 0418 0418 041c 0415 0414 041b 0415 041d 041d 042b 041c 0418 041d 0415 0418 0422 0420 041e 041d 0410 041c 0418 ; Retencion en KIO{sub 3} Solido Activado con Neutrones Rapidos y Lentos

    Energy Technology Data Exchange (ETDEWEB)

    Aten, A.H.W. Jr.; Lindner-Groen, M.; Lindner, L. [Instituut voor Kernphysisch Onderzoek, Amsterdam (Netherlands)

    1965-04-15

    cristal, y presentar caracteristicas identicas para los diferentes isotopos. Para comprobar estas hipotesis se ha realizado una serie de experimentos en los que se activo KIO{sub 3} solido con neutrones rapidos y termicos. En el caso de los neutrones rapidos, la retencion de {sup 128}I fue sensiblemente mayor que la de {sup 126}I, pero la retencion de {sup 128}I alcanzada con los neutrones termicos fue aun mas elevada que la obtenida con los neutrones rapidos. Este hecho indica que, aparte del esquema de desintegracion, la energia de retroceso tambien puede constituir un factor determinante de la retencion. Tambien difieren los efectos del recocido en el {sup 128}I y en el {sup 126}I (obtenidos ambos con neutrones rapidos). Por tratamiento postirradiatorio a temperaturas de hasta 100 Degree-Sign C, la retencion de ambos isotopos referida a la actividad total aumento en la misma proporcion, esto es, la diferencia de retencion permanecio constante. Por tanto, la parte de la fraccion de {sup 126}I reducida por el proceso de retroceso que excede de la fraccion de {sup 128}I reducida, resulta mucho menos afectada por el calentamiento que la fraccion reducida de ambos isotopos. Es evidente que solo un modelo bastante detallado permite explicar ese comportamiento quimico tan complicado del atomo radiactivo de retroceso. (author) [Russian] Prostaja model' vzaimodejstvij jader otdachi v tverdom tele predpolagaet, chto osnovnoe (neotozhzhennoe) uderzhanie dolzhno pokazat' izotopnye jeffekty (kotorye, verojatno, byli by svjazany so sposobom poteri jadrom produkta svoej izbytochnoj jadernoj jenergii) i chto jeto kolichestvo dolzhno byt' nechuvstvitel'nym k usloviju kristallicheskoj reshetki. S drugoj storony, otzhig v jetoj prostoj modeli dolzhen zaviset' ot uslovija (i predvaritel'noj obrabotki) kristalla, no pokazyvat' to zhe samoe povedenie dlja razlichnyh izotopov . Proverka jetih argumentov daetsja posredstvom provedenija serii opytov, v kotoryh tverdyj KJO{sub 3} aktivirovalsja

  2. Planned Procedures for Fast Determination of Radiation Levels and Personnel Dosimetry in Connection with Radiological Accidents; Methodes de Dosimetrie Rapide du Personnel en Cas d'Accident Radiologique; 041f 041b 0410 041d 0414 ; Servicio Organizado de Determinacion Rapida de los Niveles de Radiacion y de Dosimetria del Personal en Caso de Accidente Radiologico

    Energy Technology Data Exchange (ETDEWEB)

    Edvardsson, K. -A.; Wahlberg, T. [AB Atomenergi, Studsvik (Sweden)

    1965-06-15

    'ju. Jeta organizacija imeet svoju shtab- kvartiru, v kotoroj hranitsja oborudovanie i kotoraja imeet razlichnye vidy vnutrennih i vneshnih kommunikacij. Dlja opredelenija stepeni obluchenija neobhodimo poluchit' kak mozhno skoree predvaritel'nye dannye o moshhnosti dozy vneshnego i vnutrennego obluchenija i dovol'no tochno izmerit' stepen' obluchenija kazhdogo cheloveka, imejushhego otnoshenie k avarij, v techenie priemlemogo sroka. Special'nye gruppy po opredeleniju doz obluchenija obsledujut mesto avarii, chtoby imet' obshhuju ocenku o razmerah opasnosti. Jeti gruppy nachinajut dejstvovat' srazu zhe posle poluchenija signala trevogi. Oni imejut pri sebe portativnye pribory i peredvigajutsja na mashinah po opredelennym dorogam v meste raspolozhenija ustanovki. Prakticheskaja proverka pokazala, chto shtab-kvartira poluchaet rezul'taty obsledovanija ot jetih grupp v techenie 10 - 15 minut posle signala o radiacionnoj opasnosti, i na osnove jetih rezul'tatov mozhno sostavit' horoshee predstavlenie ob urovnjah radiacii vnutri i snaruzhi razlichnyh zdanij. Portativnoe oborudovanie vkljuchaet ustrojstva dlja vzjatija prob vozduha s krajne neznachitel'nym vremenem otbora prob, kotorye dejstvujut na osnove principa vozdushnogo jezhektora. Individual'nye vneshnie dozy opredeljajutsja na osnove jekspozicij fotoplenki, dozimetra kritichnosti, aktivacii i analiza aktivnosti volos i krovi. Vnutrennee zagrjaznenie opredeljaetsja posredstvom izmerenija aktivnosti vsego tela i radiometricheskim analizom jekskrementov. S cel'ju opredelenija polej radiacii, sozdannyh v rezul'tate avarii, rjad ustanovlennyh kontrol'nyh postov osnashhaetsja dozimetrami razlichnyh tipov, kotorye takzhe zamerjajutsja srazu zhe posle gipoteticheskoj avarii. (author)

  3. Paeonia lactiflora Pall. protects against ANIT-induced cholestasis by activating Nrf2 via PI3K/Akt signaling pathway

    Directory of Open Access Journals (Sweden)

    Ma X

    2015-09-01

    Full Text Available Xiao Ma,1,2 Yan-ling Zhao,2 Yun Zhu,3 Zhe Chen,1,2 Jia-bo Wang,4 Rui-yu Li,1,4 Chang Chen,1,2 Shi-zhang Wei,1,2 Jian-yu Li,3 Bing Liu,5 Rui-lin Wang,3 Yong-gang Li,3 Li-fu Wang,3 Xiao-he Xiao4 1Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China; 2Department of Pharmacy, 302 Military Hospital of People’s Liberation Army, Beijing, People’s Republic of China; 3Department of Integrative Medical Center, 302 Military Hospital of People’s Liberation Army, Beijing, People’s Republic of China; 4China Military Institute of Chinese Medicine, 302 Military Hospital of People’s Liberation Army, Beijing, People’s Republic of China; 5School of Chinese Medicine, The University of Hong Kong, Hong Kong Background: Paeonia lactiflora Pall. (PLP, a traditional Chinese herbal medicine, has been used for hepatic disease treatment over thousands of years. In our previous study, PLP was shown to demonstrate therapeutic effect on hepatitis with severe cholestasis. The aim of this study was to evaluate the antioxidative effect of PLP on alpha-naphthylisothiocyanate (ANIT-induced cholestasis by activating NF-E2-related factor 2 (Nrf2 via phosphatidylinositol 3-kinase (PI3K/Akt signaling pathway. Materials and methods: Liquid chromatography-mass spectrometry (LC-MS was performed to identify the main compounds present in PLP. The mechanism of action of PLP and its therapeutic effect on cholestasis, induced by ANIT, were further investigated. Serum indices such as total bilirubin (TBIL, direct bilirubin (DBIL, aspartate aminotransferase (AST, alanine aminotransferase (ALT, alkaline phosphatase (ALP, γ-glutamyl transpeptidase (γ-GT, and total bile acid (TBA were measured, and histopathology of liver was also performed to determine the efficacy of treatment with PLP. Moreover, in order to illustrate the underlying signaling pathway, liver glutathione (GSH content and mRNA or protein levels of glutamate

  4. Theory of isotope scanning; Theorie de l'Exploration par les Radioisotopes; Teoriya meditsinskikh issledovanij s primeneniem izotopov; Teoria de la exploracion mediante radioisotopos

    Energy Technology Data Exchange (ETDEWEB)

    Brownell, G L [Physics Research Laboratory, Massachusetts General Hospital, Boston, MA (United States)

    1959-07-01

    aspecto del empleo de los radioisotopos en la medicina. El autor compara los esquemas de sensibilidad de diversos sistemas de colimacion y calcula su eficacia y su poder de resolucion. Los sistemas de coliminacion de que se trata se componen de orificios cilindricos y cenicos, de colimadores de enfoque y de dispositivos que permitan detectar por coincidencia las radiaciones de aniquilacion. Formula una teoria general con miras a establecer la concentracion optima de isotopos para cada uno de los sistemas. El autor enuncia una teoria analoga con respecto a la camara de centelleo, y compara la concentracion optima de isotopos para este dispositivo en relacion con los resultados logrados con ayuda de los distintos metodos de exploracion. Estudia tambien la posibilidad de modificar el principio de la camara a fin de utilizarla en la deteccion de las radiaciones de aniquilacion. Para terminar, compara diversos sistemas de registre desde el punto de vista de su eficacia y de la presentacion de los datos. (author) [Russian] Vozmozhnost' tochno ustanovit' raspredelenie izotopov yavlyaetsya vazhnym aspektom ispol'zovaniya ikh v meditsine. Sravnivaetsya stepen' chuvstvitel'nosti razlichnykh sistem kollimirovaniya, ustanavlivaetsya ikh ehffektivnost' i razreshayushchaya sposobnost'. Rassmatrivaemye kollimiruyushchie sistemy sostoyat iz tsilindricheskikh i konusnykh otverstij, fokusiruyushchikh kollimatorov i prispo-soblenij dlya obnaruzheniya annigilyatsionnogo izlucheniya metodom sovpadenij. Vyrabatyvaetsya obshchaya teoriya s tsel'yu ustanovit' optimal'nuyu kontsentratsiyu izotopov dlya kazhdoj iz ehtikh sistem. Podobnaya zhe teoriya razrabatyvaetsya i dlya stsintillyatsionnoj kamery; pro voditsya sravnenie optimal'noj kontsentratsii izotopov ehtogo pribora v svyazi s primenyaemymi metodami issledovaniya. Obsuzhdaetsya vopros ob izmenenii printsipa dejstviya kamery v tselyakh ispol'zovaniya ee pri nalichii annigilya-tsionnogo izlucheniya. Sravnivayutsya razlichnye sistemy

  5. An Idea on the Maximum Permissible Concentrations of Radioactive Materials in Sea Water; Concentrations Maxima Admissibles des Substances Radioactives dans l'Eau de Mer; 041e 041c 0414 ; Concentracion Maxima Admisible de Materiales Radiactivos en las Aguas del Mar

    Energy Technology Data Exchange (ETDEWEB)

    Hiyama, Yoshio [University of Tokyo (Japan)

    1960-07-01

    sobre el analisis quimico de las aguas marinas y del cuerpo humano, trata; de encontrar una relacion entre el grado de contaminacion del agua del mar por varios radionuclidos y el grado de intensidad de la dosis de radiacion en el cuerpo humano causada por estos radionuclidos de origen marino. Sin, embargo, aunque los especialistas en oceanografia, salud publica, nutricion, radiobiologia y en otras materias reconozcan la conveniencia de efectuar; esos calculos habra que obtener mas datos sobre la cantidad de trazadores, en las aguas del mar, en los productos marinos y en el cuerpo humano, para confeccionar un cuadro de las concentraciones maximas admisibles de diversos radionuclidos en las aguas del mar. En la memoria, el autor se limita a enunciar la idea y a describir algunos ejemplos. (author) [Russian] V nastojashhem doklade avtor stremitsja najti svjaz' mezhdu urovnem zarazhennosti morskoj vody nekotorymi vidami radionuklidov i urovnem radiacionnoj dozy, poluchaemoj chelovekom v rezul'tate dejstvija radionuklidov morskogo proishozhdenija; avtor ispol'zuet pri jetom rekomendacii MKRZ i nekotorye dannye himicheskogo analiza morskoj vody i chelovecheskogo organizma, izvestnye emu. Odanko, esli ideja jetih raschetov budet priznana uchenymi v oblasti okeanografii, zdravoohranenija, pitanija, radiacionnoj biologii i dr., vse zhe potrebujutsja dopolnitel'nye dannye o kolichestvah metjashhih jelementov v morskoj vode, v produktah morja i v chelovecheskom organizme dlja togo, chtoby zavershit' tablicu maksimal'no dopustimyh koncentracij v morskoj vode razlichnyh vidov radionuklidov. Ideja, vyskazannaja v doklade, nosit chisto predvaritel'nyj harakter; v doklade takzhe dajutsja nekotorye primery. (author)

  6. The Treatment of Cancer by a Radioactive Drug: Tritium-Labelled Tetra-Sodium 2-Methyl-1:4-Naphthaquinol Diphosphate; Traitement du Cancer par un Remede Radioactif: Le Diphosphate Tetrasodique de Methyl-2 Naphtoquinone-1,4 Tritie; 041b 0435 0447 0435 043d 0414 ; Tratamiento del Cancer con la Sal Tetrasodica del Acido 2-Metil-1,4-Naftoquinon Difosforico Marcada con Tritio

    Energy Technology Data Exchange (ETDEWEB)

    Marrian, D. H.; Marshall, Barbara; Mitchell, J. S.; Simon-Reuss, I. [Department of Radiotherapeutics, University of Cambridge, Cambridge (United Kingdom)

    1962-02-15

    tetrasodica del acido 2-metil-l,4-naftoquinon-difosforico (''Synkavit'' Roche), asi como algunos de los metodos que se han empleado para marcar este y otros compuestos analogos. Sintetizaron el compuesto tritiado en forma de obtener una substancia radioquimicamente pura de 28 c/mmol (1 atomo de tritio por molecula) de actividad especifica. Demuestran que este producto penetra muy rapidamente en las celulas vivas, tanto in vivo como in vitro y que, en igualdad de condiciones los cultivos de celulas malignas incorporan en grado mucho mayor el compuesto marcado que los cultivos de celulas normales. Describen las investigaciones preliminares del empleo clinico de ese producto en casos avanzados de tumores malignos que suelen ser refractarios a otros tratamientos, observandose que la medula osea absorbe menor cantidad del compuesto que el tumor (en algunas ocasiones, hasta cinco veces menos). (author) [Russian] Dejstvie tetrasoda - 2-metil-1: 4- naftagidrohinondifosfata (Sinkavit - proizvodstvo Roshe) v kachestve radio- senitajzera obsuzhdaetsja narjadu s bolee rannimi metodami mechenija jetih i podob- nyh molekul. Sintez jetogo soedinenija, mechennogo tritiem, byl sdelan dlja togo, chtoby polu- chit' radiohimicheskoe chistoe lekarstvo s udel'noj aktivnost'ju v 28 kjuri/mil- limol' (odin atom tritija na molekulu). Budet pokazano, chto jeto soedinenie bystro vhodit v zhivuju kletku kak v este- stvennyh, tak i i laboratornyh uslovijah i chto kul'tury zlokachestvennyh kletok pogloshhajut mechenye atomy v gorazdo bol'shem ob{sup e}me, chem kul'tury normal'nyh kletok pri teh zhe uslovijah. Budut opisany predvaritel'nye issledovanija primenenija jetogo lekarstva na pacientah, imejushhih zlokachestvennye opuholi i nahodjashhihsja v tjazhelom ili neizlechimom sostojanii; usvoenie kostnym na kojefficient 5 mozgom nizhe, chem usvoenie opuhol'ju. (author)

  7. Extensions of the techniques for the accelerated unspecific isotopic labelling of organic compounds; Applications nouvelles des techniques accelererees du marquage non specifique de composes organiques; Rasprostranenie metodov uskoreniya mecheniya nespetsifichnymi izotopami organicheskikh slozhnykh soedinenij; Nuevas aplicaciones de las tecnicas de marcacion inespecifica acelerada de compuestos organicos

    Energy Technology Data Exchange (ETDEWEB)

    Ghanem, N A [National Research Centre, El-Dokki, Cairo (Egypt); Westermark, T [Division of Physical Chemistry, Royal Institute of Technology, Stockholm 70 (Sweden)

    1962-03-15

    marcar, y citar ejemplos en los que este procedimiento se ha empleado con exito. Las diversas tecnicas se basan en el uso de descargas de microondas y de ondas hertzianas, descargas luminiscentes producidas por corriente continua, o alterna, o sencillamente rayos ultravioleta. Se han obtenido cantidades considerables de productos purificados con actividades superiores a 100 mcuries/g. Los tiempos de exposicion a las descargas son del orden de un minuto, y en la mayoria de los casos se observo poca descomposicion. Los autores calcularon el rendimiento energetico alcanzado en estos metodos de marcacion y lo comparan con el correspondiente a las radiaciones ionizantes empleadas por Wilzbach y otros investigadores; tambien dan los valores de G para la sustitucion isotopica. Existen pruebas de que la marcacion del poliestireno se produce en virtud de una reaccion atomo-molecula. (author) [Russian] Tsel'yu nastoyashchego doklada yavlyaetsya rassmotrenie novykh sposobov uskoreniya reaktsii mezhdu radioaktivnym gazom i materialom misheni, podlezhashchim mecheniyu, a takzhe privedenie primerov uspeshnykh sluchaev. Ehti metody vklyuchayut ispol'zovanie razryadov mikrovoln i radiovoln, tleyushchikh razryadov pod vozdejstviem istochnikov postoyannogo ili peremennogo tokov, ili prosto radiatsii ul'trafioletovykh luchej. Byla dostignuta udel'naya aktivnost', dokhodyashchaya do 100 mikrokyuri na gramm, v znachitel'nykh kolichestvakh ochishchennogo produkta. Vremya vozdejstviya razryada bylo poryadka odnoj minuty, i vo mnogikh sluchayakh razlozhenie bylo chrezvychajno ogranichennym. Dayutsya podschety ehffektivnosti ispol'zovaniya ehnergii dlya proizvodstva mecheniya ehtimi metodami po sravneniyu s zatratoj dlya toj zhe tseli ehnergii ioniziruyushchego izlucheniya, ispol'zuemoj Vil'tsbakhom i dr. ; krome togo, ukazyvayutsya znacheniya radiatsionnokhimicheskogo vykhoda G dlya zameny izotopov. Est' ukazaniya na to, chto pri mechenii polistirola mekhanizm opredelyaetsya reaktsiej atom

  8. Bardoxolone methyl induces apoptosis and autophagy and inhibits epithelial-to-mesenchymal transition and stemness in esophageal squamous cancer cells

    Directory of Open Access Journals (Sweden)

    Wang YY

    2015-02-01

    Full Text Available Yan-Yang Wang,1,2 Yin-Xue Yang,3 Ren Zhao,1 Shu-Ting Pan,2,4 Hong Zhe,1 Zhi-Xu He,5 Wei Duan,6 Xueji Zhang,7 Tianxin Yang,8 Jia-Xuan Qiu,4 Shu-Feng Zhou2,51Department of Radiation Oncology, General Hospital of Ningxia Medical University, Yinchuan, People’s Republic of China; 2Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL, USA; 3Department of Colorectal Surgery, General Hospital of Ningxia Medical University, Yinchuan, People’s Republic of China; 4Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, 5Guizhou Provincial Key Laboratory for Regenerative Medicine, Stem Cell and Tissue Engineering Research Center and Sino-US Joint Laboratory for Medical Sciences, Guiyang Medical University, Guiyang, People’s Republic of China; 6School of Medicine, Deakin University, Waurn Ponds, VIC, Australia; 7Research Center for Bioengineering and Sensing Technology, University of Science and Technology Beijing, Beijing, People’s Republic of China; 8Department of Internal Medicine, University of Utah and Salt Lake Veterans Affairs Medical Center, Salt Lake City, UT, USAAbstract: Natural and synthetic triterpenoids have been shown to kill cancer cells via multiple mechanisms. The therapeutic effect and underlying mechanism of the synthetic triterpenoid bardoxolone methyl (C-28 methyl ester of 2-cyano-3,12-dioxoolean-1,9-dien-28-oic acid; CDDO-Me on esophageal cancer are unclear. Herein, we aimed to investigate the anticancer effects and underlying mechanisms of CDDO-Me in human esophageal squamous cell carcinoma (ESCC cells. Our study showed that CDDO-Me suppressed the proliferation and arrested cells in G2/M phase, and induced apoptosis in human ESCC Ec109 and KYSE70 cells. The G2/M arrest was accompanied with upregulated p21Waf1/Cip1 and p53 expression. CDDO-Me significantly decreased B-cell lymphoma-extra large (Bcl-xl, B-cell lymphoma 2 (Bcl-2

  9. Effects of Incorporated Radioactivity and External Radiation on Heterogeneous Catalysis; Effets de la radioactivite incorporee et des rayonnements externes sur la catalyse heterogene; Vliyanie vvedennoj radioaktivnosti i vneshnego oblucheniya na geterogennyj kataliz; Efectos de la radiactividad incorporada y de la irradiacion externa sobre la catalisis heterogenea

    Energy Technology Data Exchange (ETDEWEB)

    Krohn, N. A.; Wymer, R. G. [Oak Ridge National Laboratory, Oak Ridge and University of Tennessee, Knoxville, Tennessee (United States)

    1963-11-15

    aktivirovannykh alyumokhromovykh katalizatorakh. Izucheny ehffekty vvedeniya v katalizator radioaktivnykh izotopov i predvaritel'nogo gamma-oblucheniya ot istochnika Co''6''0. Sud'fatmagnievyj katalizator i katalizator smeshannogo tipa sul'fat magniya + sul'fat natriya, soderzhashchie do 45,5 mkkyuri (S''3''5)/r, pri raschete na edinitsu poverkhnosti menee aktivny, chem katalizatory togo zhe sostava, no ne soderzhashchie radioaktivnykh izotopov. Oslablenie kataliticheskoj aktivnosti sokhranyalos' dazhe posle togo, kak radioaktivnost' sushchestvenno pala, dalee, pri obluchenii rentgenovskimi luchami, kotoroe provodilos' v protsesse reaktsii, nikakikh izmenenij v kataliticheskoj aktivnosti ne nablyudalos'. Na osnovanii ehtikh dannykh sdelan vyvod, chto ehmissiya beta-chastits iz katalizatora v protsesse ego ispol'zovaniya ne okazyvaet nikakogo vliyaniya. Soobshcheniya ob usilenii kataliticheskoj aktivnosti sleduet otnesti za schet togo, chto pri prigotovlenii katalizatorov u tekh iz nikh, kotorye soderzhali radioaktivnye izotopy, vozmozhno poluchalas' bol'shaya ploshchad' poverkh- nosti, chem u tekh, kotorye ne soderzhali radioaktivnykh izotopov. Ehto obstoyatel'stvo ne bylo prinyato vo vnimanie. Predvaritel'noe gamma-obluchenie ot istochnika Co''6''0 dozoj 10''1''1 erg/g ne okazalo vliyaniya na kataliticheskuyu aktivnost'. S drugoj storony, predvaritel'noe obluchenie gamma-luchami ot istochnika Co{sup 60} alyumokhromovykh katalizatorov dozoj 4,2 x 10{sup 11} erg/g usililo kataliticheskuyu aktivnost' pochti na 34%, pri 485{sup o}C. V to zhe vremya vvedenie v katalizator do 148 mkkyuri (Pm{sup 147} )/g katalizatora ne okazyvalo pochti nikakogo vozdejstviya. V ehtom sluchae ne nablyudalos' skol'ko-nibud' zametnogo vliyaniya izlucheniya na ploshchad' poverkhnosti ili na kazhushchuyusya ehnergiyu aktivatsii. (author)

  10. Ultrasonic Inspection following Heat Treatment of Uranium Alloys; Controle des Traitements Thermiques d'Alliage d'Uranium par Ultrasons; Kontrol' termicheskoj obrabotki uranovykh splavov s pomoshch'yu ul'trazvuka; Control Ultrasonico de los Tratamientos Termicos de Aleaciones de Uranio

    Energy Technology Data Exchange (ETDEWEB)

    Destribats, Marie-Therese; Cherpentier, C.; Papezik, F.; Pigeon, M. [Centre d' Etudes Nucleaires Desaclay (France)

    1965-10-15

    'zujutsja slegka legirovannye splavy urana, chasto voznikaet neobhodimost' izmel'chat' zerna termicheskoj obrabotkoj. Pri jetom okazalos' neobhodimym osushhestvljat' kontrol' za vsemi jelementami i za vsem proizvodstvom, chtoby tochno znat' kachestvo ispol'zovannogo topliva. Jetot kontrol' nevozmozhno osushhestvljat' cherez mikrografiju, tak kak on zanimaet mnogo vremeni i ne daet polnyh rezul'tatov. Kontrol prinjatyj v jadernom centre, osnovan na principe pogloshhenija ul'trazvukov materialami. Dannoe pogloshhenie svjazano so strukturoj sredy. Esli znachenie Xmalo po sravneniju s velichinoj zerna {lambda}, to pogloshhenie slaboe, a esli G sostavljaet porjadka {lambda}/2, to pogloshhenie ochen' sil'noe. Vse pervye opyty provodili v vozduhe na osnove analiza mnogokratnyh jeho i zatem izmerjali vysoty pervogo jeha. Dalee izmerenie provodili v vode. Pri jetom sravnivali vysoty propushhennogo i pervonachal'nogo jeha. Pri promyshlennom kontrole sravnivaetsja amplituda jeha, propushhennogo cherez material, s jehom, poluchennym na horosho obrabotannom jetalone togo zhe tipa i toj zhe geometricheskoj formy. Ispytanie provodili v special'noj ustanovke, kogda materialy zapuskali v rotaciju s pomoshh'ju rolikov, a napravljaemye preobrazovateli peremeshhali vdol' jelementa. Vintovoe skennirovanie osushhestvljali pri shage menee 5 mm. V ul'trazvukovom generatore imeetsja sistema regulirovanija,kotoraja podderzhivaet kontrol'noe jeho. Privoditsja serija zapisej po razlichnym splavam, i v chastnosti govoritsja o defektah, nabljudaemyh u jelementov, kotorye byli obrabotany indukciej vo vremja prohozhdenija. Obnaruzhivajutsja ploho obrabotannye uchastki razmerom menee 1 sm{sup 2} . V nastojashhee vremja podobnym obrazom osushhestvljaetsja kontrol' za vsemi tipami topliva v vide slegka legirovannyh uranovyh splavov, primenjaemyh v reaktorah G2 EL3,EF1 EdF2 i INCA, inymi slovami, kontrolirujutsja vse sterzhni i trubki s diametrom mezhdu 20 i 95 mm. (author)

  11. Recoil Processes of Cr{sup 51} in Mixed Inorganic Systems; Processus de Recul de {sup 51}Cr dans des Melanges Inorganique; 041f 0420 041e 0426 0415 0421 0421 042b 0421 042f 0414 0420 0410 041c 0418 041e 0422 0414 0410 0427 0418 0425 0420 041e 041c 0410 -51 0412 0421 041c 0415 III 0410 041d 041d 042b 0425 041d 0415 041e 0420 0413 0410 041d 0418 0427 0415 0421 041a 0418 0425 0421 0418 0421 0422 0415 041c 0410 0425 ; Procesos de Retroceso del {sup 51}Cr en Sistemas Inorganicos Mixtos

    Energy Technology Data Exchange (ETDEWEB)

    Veljkovic, S. R.; Milenkovic, S. M.; Ratkovic, M. R. [Boris Kidric Institute of Nuclear Sciences, Vinca, Yugoslavia (Serbia); Faculty Of Natural Sciences, Belgrade University, Belgrade, Yugoslavia (Serbia)

    1965-04-15

    smesjah hromatov ili solej hroma s neorganicheskimi okislami. V kachestve okislov ispol'zovalis' AI{sub 2}O{sub 3}, SiO{sub 2} i MgO. Termicheskie jeffekty kontrolirovalis' parallel'no dlja ocenki chisto teplovyh vozdejstvij v reaktore i dlja ocenki vozmozhnogo vnutrennego nagreva v mishenjah. V sisteme, gde hromaty byli osazhdeny na MgO, nabljudalos' sil'noe vosstanovlenie do hrom-iona. Pri temperature obluchenija nejtronnye jeffekty prevalirovali nad termicheskimi processami i tol'ko nagrevanie do temperatury vyshe 600 Degree-Sign S davalo podobnyj rezul'tat. Ion hroma vo vremja obluchenija ne izmenilsja. Uvelichenie koncentracii hromatov privodilo k horosho izvestnomu uderzhaniju Cr{sup 51}O{sub 4}{sup =}. Hromaty, adsorbirovannye na glinozeme, sohranjali formu okisi tak zhe, kak i v sisteme s SiO{sub 2}. Teplovye jeffekty imeli to zhe samoe napravlenie. Ion hroma, absorbirovannyj na jetih okisjah, vedet sebja razlichno. V sisteme s glinozemom otmechalos' sil'noe okislenie, kotoroe znachitel'no prevyshalo vklad teplovyh processov. Pri sravnenii jeffekta obluchenija i nagreva v sisteme s SiO{sub 2} obnaruzhena nebol'shaja raznica, hotja bylo otmecheno bol'shoe diffuzionnoe obednenie poverhnosti ionami hroma. Obshhaja osobennost' vseh sistem sostoit v ochen' nebol'shoj koncentracii soedinenij hroma. Himija tonkogo sloja, po-vidimomu, otlichaetsja ot obychnogo povedenija bol'shih mass hromatov v bol'shinstve sluchaev, kak v teplovyh processah, tak i v processe otdachi. Jeto mozhet oznachat', chto processy v ''gorjachih tochkah'', nahodjas' v zavisimosti ot vseh komponentov, mogut davat' himicheskie produkty, chuvstvitel'nye k harakteru misheni. Obobshhennaja kartina processov s jadrami otdachi v tverdyh soedinenijah, po-vidimomu, nuzhdaetsja v dopolnitel'nom rassmotrenii voprosa o materiale matric. (author)

  12. Thermal Annealing of Paramagnetic Defects Induced by Gamma Irradiation in (NH{sub 4}){sub 2}SO{sub 4} and (ND{sub 4}){sub 2}SO{sub 4} Single Crystals: Experimental Verification of the Theory of Fletcher and Brown; Recuit Thermique des Defauts Paramagnetiques Induits par Irradiation Gamma dans des Monocristaux de (NH{sub 4}){sub 2}SO{sub 4} et (ND{sub 4}){sub 2}SO{sub 4}: Verification Experimentale de la Theorie de Fletcher et Brown; 0422 0415 0420 041c 0414 ; Regeneracion Termica de los Defectos Paramagneticos Inducidos por Irradiacion Gamma en Monocristales de (NH{sub 4}){sub 2}SO{sub 4} y (ND{sub 4}){sub 2}SO{sub 4}: Verificacion Experimental de la Teoria de Fletcher y Brown

    Energy Technology Data Exchange (ETDEWEB)

    Calusaru, A.; Barbur, I.; Ursu, I. [Institut de Physique Atomique, Bucarest (Romania); Universite ' Babes' , Cluj (Romania)

    1965-04-15

    ,996 y 2,0032, respectivamente. El estudio de la regeneracion por recocido del primer radical en el intervalo 60 Degree-Sign -170 Degree-Sign C revela la existencia de una cinetica con un solo rellano correspondiente a una recombinacion total de los radicales. Se ha podido establecer, para cada isoterma, la ecuacion correspondiente utilizando la funcion de errores deducida por Fletcher y Brown considerando el modelo de recombinacion de pares inicialmente correlacionados (y luego liberados) segun un proceso aleatorio. La concordancia entre los resultados experimentales y la funcion se obtiene corrigiendo esta mediante un factor alfa. La curva compuesta de recocido se ajusta muy bien a la funcion de errores corregida. Aplicando el metodo fenomenologico de Fletcher y Brown para calcular la energia de activacion, se ha hallado el valor de 1,594 eV, correspondiente al primer radical en el (NH{sub 4}){sub 2}SO{sub 4}. Basandose en la variacion del coeficiente de difusion con la temperatura, se ha determinado el valor de 1,592 eV para la misma energia de activacion. Aplicando el metodo de Vand-Primack se ha hallado el valor de 1,45 eV, menor que los dos anteriores. Se estima, en conclusion, que el modelo de recombinacion de pares correlacionados segun un proceso aleatorio es aplicable en la formula dada por la teoria cuando la interaccion de las especies formadas con la red es bastante debil; en esas condiciones, los pares correlacionados inicialmente pueden liberarse. (author) [Russian] V obluchennyh kristallah (NH{sub 4}){sub 2}SO{sub 4} i (ND{sub 4}){sub 2}SO{sub 4} s pomoshh'ju metoda rezonansa spina jelektrona byli identificirovany dva paramagnitnyh vida. Konstanta g pervogo radikala sostavljaet 2,014 i vtorogo-2,020 dlja sul'fata ammonija s vodorodom; te zhe konstanty dlja dejterirovannogo kristalla sostavljajut 1,9996 i 2,0032. Izuchenie otzhiga pervogo radikala pri temperaturah mezhdu 60 Degree-Sign i 170 Degree-Sign C pokazalo, chto v dannom sluchae imeet mesto

  13. The Main Technological Characteristics of Apparatus for Industrial Radiochemical Processes, in Particular Ethylene Polymerization; Caracteristique techniques fondamentals des appareils pour l'application industrielle de reactions chimiques sous rayonnement (notamment la polymerisation de l'ethylene ); Osnovnye tekhnologicheskie kharakteristiki apparatov dlya provedeniya radiatsionno-khimi-cheskikh protsessov (v chastnosti, dlya polimerizatsii ehtilena) v promyshlennom masshtabe; Principales caracteristicas tecnologicas de los aparatos para la aplicacion industrial de reacciones radioquimicas

    Energy Technology Data Exchange (ETDEWEB)

    Syrkus, N P; Breger, A K; Weinstein, B I [Karpov Physicochemical Institute, Moscow, USSR (Russian Federation)

    1960-07-15

    , Q {approx} W{sub 0}{sup 0'5}. (author) [Spanish] Se propone un metodo de evaluacion de la efectividad de los aparatos, cualquiera que sea su construccion, comparandola con la productividad de un aparato infinitamente grande que tenga la misma fuente de radiaciones. Se indican las caracteristicas tecnologicas de un aparato destinado a la polimerizacion del etileno mediante radiaciones (a presion de 200 atmosferas y temperatura de 25{sup o} C{sup 4} empleando como fuente principal radiaciones gamma de cobalto-60 a distintas actividades. Se pueden calcular los datos tecnicos de tal aparato segun el valor medio de la intensidad de las dosis, fijado segun la magnitud del coeficiente de rendimiento energetico del aparato. Se indica en el trabajo que, siendo las demas condiciones iguales, la productividad (Q) del aparato es funcion exponencial de la intensidad (W{sub 0}) de las radiaciones gamma del mismo. Para el aparato que se estudia en el trabajo la formula es: Q{approx}W{sub 0}{sup 0'5}. (author) [Russian] V doklade rassmotreny v obshchem vide otdel'nye naibolee vazhnye tekhnologicheskie kharakteristiki apparatov (na primere sfericheskogo apparata) dlya provedeniya radiatsionno-khimicheskikh protsessov v promyshlennom masshtabe. Predlozhen metod otsenki ehffektivnosti apparata lyuboj konstruktsii putem sravneniya s proizvoditel'nost' yu beskonechno bol'shogo apparata, imeyushchego tot zhe istochnik izlucheniya. Priveden raschet tekhnologicheskoj kharakteristiki apparata dlya radiatsionnoj polimerizatsii ehtilena (davlenie 200 atm, temperatura 25{sup o} C{sup 3} so sterzhnevym istochnikom gamma-izlucheni ya Co{sup 60} razlichnoj aktivnosti. Takoj apparat mozhno rasschityvat' po srednim znacheniyam moshchnostej doz, opredelyaemym po velichine ehnergeticheskogo KPD apparata. Pokazano, chto proizvoditel'nost'apparata (Q), pri prochikh ravnykh usloviyakh, yavlyaetsya stepennoj funktsiej moshchnosti (W{sub 0}) gamma-izlucheniya apparata. Dlya rassmotrennogo apparata : Q

  14. Treatment of radiostrontium uptake in man; Traitement de la fixation de radiostrontium chez l'homme; Lechenie posledstvij pogloshcheniya radioaktivnogo strontsiya u cheloveka; Tratamiento de la radiotoxemla humana causada por absorcion de radioestroncio

    Energy Technology Data Exchange (ETDEWEB)

    Volf, V. [Department of Ionizing Radiation Institute of Industrial Hygiene and Occupational Disease, Prague, CSSR (Czech Republic)

    1963-02-15

    lecheniya proveryalas' v ehksperimente na krysakh v tekh zhe usloviyakh, kotorye imeli mesto vo vremya intsidenta. Pozdnee byli issledovany neskol'ko rakovykh bol'nykh s tsel'yu izucheniya dal'nejshikh vozmozhnostej okazaniya pervoj pomoshchi pri ostrom vnutrennem otravlenii radiostrontsiem u cheloveka. (author)

  15. Radioactive thickness gauge; Jauge d'epaisseur radioactive; Radioaktivnyj tolshchinomer; Calibrador radiactivo

    Energy Technology Data Exchange (ETDEWEB)

    Guizerix, J [Centre d' Etudes Nucleaires de Grenoble, Grenoble (France)

    1962-01-15

    traves del material que se desea medir y luego una fuente testigo de la misma naturaleza; la separacion de las radiaciones en el tiempo se efectua con ayuda de un obturador absorbente, con sectores llenos y huecos alternados. Despues del tubo fotomultiplicador se separan las corrientes que corresponden a cada una de las fuentes mediante un detector sincronizado con el movimiento de rotacion del obturador. A continuacion, se obtiene el cociente de ambas con ayuda de un potenciometro registrador de tipo clasico. Gracias a este montaje, el valor medio de la respuesta, que es del tipo G = f(I{sub 1}/I{sub 2}), no resulta afectado por el decrecimiento de las fuentes radiactivas; ademas, las variaciones de la alta tension, de la temperatura o de las propiedades del aire en el intervalo comprendido entre la fuente y el detector solo ejercen una reducida influencia sobre el valor obtenido. El autor expone las caracteristicas de funcionamiento de este calibrador. (author) [Russian] Avtor opisyvaet tolshchinomer, v kotorom stsintillyatsionnyj kristall-detektor poperemenno ''prosmatrivaet'' radioaktivnyj istochnik cherez izmeryaemyj material, a zatem sravnitel'nyj istochnik takogo zhe kharaktera; razdelenie izluchenij osushchestvlyaetsya inogda pri pomoshchi zaslonki segmentnogo poglotitelya poperemenno polnogo i pologo. Toki, sootvetstvuyushchie oboim istochnikam, razdelyayutsya posle trubki fotoumnozhitelya sinkhronnym detektorom pri pomoshchi vrashcheniya zaslonki. Zatem vychislyayut koehffitsient ehtikh oboikh tokov s pomoshch'yu obychnogo kontrol'nogo potentsiometra. Iz ehtogo polozheniya vytekaet, chto srednee znachenie otveta, kotoroe sleduet iz formuly G = f(I{sub 1}/I{sub 2}) ne uchityvaetsya pri raspade radioaktivnykh istochnikov i chto ono malo chuvstvitel'no k izmeneniyam vysokogo napryazheniya, temperatury ili atmosfernykh svojstv, imeyushchikh mesto v promezhutke mezhdu istochnikom i detektorom. Privodyatsya rezul'taty ehtogo izmeritelya. (author)

  16. Kinetics and Mechanism of the Iron(II-Iron(III) Electron-Exchange Reaction in Mixed Solvent Media; Cinetique et Mecanisme de l'Echange d'Electrons entre Fer (II) et Fer (III), dans des Melanges de Solvants; Ikinetika i mekhanizm reaktsii ehlektronnogo obmena zheleza (I) - zheleza (III) v smeshannoj rastvoryayushchej srede; Cinetica y Mecanismo del Intercambio de Electrones Entre Fe{sup II} Y Fe{sup lII} en Mezclas de Disolventes

    Energy Technology Data Exchange (ETDEWEB)

    Horne, R. A. [Arthur D. Little, Inc. Cambridge, MA (United States)

    1965-10-15

    de intercambio electronico entre Fe{sup II} y Fe{sup III} a diversas temperaturas, grados de acidez y fuerzas ionicas, en soluciones de aguaacetona, agua-metanol y agua-etanol. La velocidad de reaccion disminuye apreciablemente al aumentar la concentracion de agua en el ultimo de estos sistemas, tendiendo a cero con la concentracion. La energfa de activacion del intercambio es la misma en mezclas de disolventes que en solucion acuosa. La constante dielectrica efectiva que interviene entre los reactivos sigue siendo la misma que en agua pura, incluso par a soluciones en agua-etanol bastante pobres en agua. Las mediciones espectroscopicas y del intercambio electronico reflejan las alteraciones de la composicion de la vaina de solvatacion del Fe{sup III} en disolventes mixtos. Estos resultados corroboran la teoria de que el intercambio electronico se efectua por intermedio de puentes agua. (author) [Russian] Byli izmereny udel'nye kon stanty skorosti reakcii jelektronnogo obmena Fe{sup II} - Fe{sup III} n pri razlichnyh temperaturah kislotnostjah i ionnyh silah v sredah: voda - aceton, voda - metanal i voda - jetanol. Sko rost' reakcii zametno snizhaetsja s umen'sheniem koncentracii vody v poslednej sistem i priblizhaetsja k nulju, kogda koncentracija vody priblizhaetsja k nulju. Jenergija aktivaci obmena javljaetsja toj zhe samoj v.smeshannom rastvore, kak i v vodnom rastvore. Jeffektiv naja dijelektricheskaja konstanta, kotoruju 'vidjat' reagirujushhie veshhestva, prodolzhaet byt konstantoj chistoj vody dazhe v rastvorah - jetanol, vpolne rastvorimyh v vode. Iz menenija v sostave obolochki sol'vatacii Fe{sup III} v smeshannoj srede otrazhajutsja kak v jelek tronnom obmene, tak i v spektroskopicheskih izmerenijah. Jeti vyvody, poluchennye na osnov rezul'tatov v smeshannoj rastvorjajushhej srede, podtverzhdajut teoriju vodjanogo mostika pr jelektronnom obmene. (author)

  17. Identification and estimation ot carbohydrates using radioisotopic methods; Identification et dosage des hydrates de carbone a l'aide des radioisotopes; Identifikatsiya i opredelenie karbogidratov s pomoshch'yu radioizotopnykh metodov; Identificacion u valoracion de hidratos de carbono con ayuda de radioisotopos

    Energy Technology Data Exchange (ETDEWEB)

    Phillips, G O; Criddle, W J [Department of Chemistry, University College, Cardiff (United Kingdom)

    1962-01-15

    chromatogrammes sur bandes de papier; elle n'exige qu'une modification peu couteuse du materiel de comptage traditionnel. (author) [Spanish] Dado que los metodos analiticos clasicos no permiten obtener resultados satisfactorios, los autores han perfeccionado unos metodos de dilucion isotopica para identificar y valorar los productos que se forman en pequenas cantidades al exponer hidratos de carbono en solucion acuosa a las radiaciones gamma del {sup 60}Co. Las autorradiografias de cromatogramas sobre papel, obtenidos despues de irradiar soluciones de azucares marcados con {sup 14}C, revelan una considerable degradacion molecular. Gracias a un metodo de dilucion isotopica inverso basado en la adicion de portadores conocidos, y en la obtencion de derivados cristalizados de los fragmentos, los autores han podido determinar cuantitativamente los siguientes constituyentes. El metodo descrito por los autores permite distinguir entre estereoisomeros y valorar cada lino de ellos por separado. Asimismo puede utilizarse para resolver otros problemas de orden analitico que plantea la quimica de los hidratos de carbono. Los autores describen un nuevo metodo de exploracion y registro de la radiactividad a lo largo de las tiras de papel en las que se ha desarrollado el cromatograma. Este metodo solo requiere una modificacion poco onerosa del equipo de recuento corriente. (author) [Russian] Dlya identifikatsii i otsenki nebol'shikh kolichestv obrazovavshikhsya produktov pri obluchenii karbogidratov v vodnom rastvore gamma-aktivnym kobal'tom-60 byli razrabotany metody razbavleniya izotopov. Obychnye zhe analiticheskie metody okazalis' nedostatochnymi. Po obluchenii rastvorov S14-sakhar podgotovlennye avtoradiografii posle khromatografii na bumage ukazyvayut na znachitel'noe snizhenie. Ispol'zovanie protsedury obratnogo izotopnogo rastvora, svyazannoj s dobavkoj izvestnykh nositelej i preobrazovaniem oskolkov v derivaty kristallov, byli opredeleny kolichestvennye razmery sleduyushchikh

  18. Indirect Lymphography and its Importance in Oncology; La Lymphographie Indirecte et son Interet en Oncologie; Kosvennaya limfografiya i ee znachenie v onkologii; La Linfografia Indirecta y su Interes en Oncologia

    Energy Technology Data Exchange (ETDEWEB)

    Delaloye, B.; Magnenat, P. [Laboratoire des Radioisotopes, Clinique Medicale Universitaire de Lausanne, Lausanne (Switzerland)

    1964-10-15

    par injection sous-capsulaire d'or-198 colloiedal par voie transcutanee. Cette technique permet de mettre en evidence la chaine mediastinale lymphatique anterieure et posterieure. (author) [Spanish] La linfografia indirecta, para la cual solo se requiere una inyeccion subcutanea de oro-198 coloidal, cuyas particulas tienen un diametro de 50 A. en los tributarios del sistema linfatico que se quieren explorar, permite visualizar por registro centelleo- grafico las cadenas ganglionares linfaticas. Los autores examinan los problemas de colimacion a fin de obtener la mejor definicion posible. Esta tecnica de investigacion del sistema linfatico facilita indirectamente, cuando se mide el tiempo de aparicion del oro en la sangre, informaciones sobre la velocidad de circulacion de las particulas de oro coloidal por los vasos linfaticos. Permite tambien obtener informaciones utiles sobre las infiltraciones neoplasticas de los ganglios, con lo que es posible conocer el alcance de una infiltracion metastatica. Los autores presentan algunos ejemplos clinicos. Describen, ademas, una nueva tecnica de linfografia hepatica por inyeccion intracapsular de oro-198 coloidal por vfa transcutanea. Esta tecnica permite visualizar la cadena mediastuiica linfatica anterior y posterior. (author) [Russian] Kosvennaja Limfo- Grafija, Kotoraja Trebuet Lish' Podkozhnogo Vvedenija Kolloidal'Nogo Zolota-198 (Diametr Chastic 50a) V Sootvetstvujushhem Uchastke Limfaticheskoj Sistemy, Daet S Pomoshh'Ju Scinti- Graficheskoj Registracii Vozmozhnost' S Dostatochnoj Ochevidnost'Ju Vyjavljat' Cepi Limfaticheskih Uzlov. Obsuzhdajutsja Problemy Kollimacii V Celjah Nailuchshego Opredelenija. Takoj Metod Issledovanija Limfaticheskoj Sistemy Pozvoljaet Pri Izmerenii Vremeni Pojavlenija Zolota V Krovi Poluchat' Kosvennym Putem Svedenija O Skorosti Perenosa Chastic Kolloidal'Nogo Zolota Po Limfaticheskim Sosudam. Tak Zhe Byli Polucheny Poleznye Svedenija O Neoplasticheskoj Infil'Tracii Uzlov, Chto Daet

  19. First Results of a Systematic Study of Internal Contamination Due to Fall-Out; Premiers Resultats d'une Etude Systematique des Contaminations Internes Consecutives aux Retombees Radioactives; 041f 0415 0420 0414 ; Resultados Iniciales de un Estudio Sistematico de las Contaminaciones Internas Debidas a la Precipitacion Radiactiva

    Energy Technology Data Exchange (ETDEWEB)

    Pellerin, P.; Moroni, J. P.; Remy, M. L. [Travail du Service Central de Protection Contre les Rayonnements Ionisants, Ministere de la Sante Publique, Paris (France)

    1964-11-15

    organismo humano tendria capital importancia, pero la medicion directa de este isotopo mediante el antropogammametro no puede realizarse cuando se trata de bajas actividades. Por lo tanto, los autores procuraron evaluar el orden de magnitud de dicha carga por dos metodos diferentes: primeramente, el estudio del cesio-137, cuya concentracion en las precipitaciones radiactivas sigue una evolucion sensiblemente paralela al del estroncio-90, permite hallar una primera aproximacion. Ademas, los autores midieron la excrecion urinaria de estroncio-90 en cierto numero de sujetos, con el proposito de deducir asi la carga total o, por lo menos, encontrar un limite superior para la concentracion de dicho isotopo. (author) [Russian] S sentjabrja 1961 goda Central'naja sluzhba zashhity ot ionizirujushhih izluchenij provela svyshe 500 obsledovanij s pomosh'ju schetchika dlja izmerenija radioaktivnosti vsego organizma cheloveka. Mnogie lica obsledovalis' v techenii treh ili shesti mesjacev . Pri jetih obsledovanijah chasto ispol'zovalsja radioanaliz mochi, v celom radiohimicheskomu issledovaniju predshestvovalo sistematicheskoe izuchenie obrazcov mochi s pomosh'ju gamma-spektrometrii.Sravnitel'noe izuchenie rezul'tatov jetih razlichnyh issledovanij pozvoljaet vyjavit' nekotorye fakty, otnosjashhiesja k vnutrennemu zarazheniju v rezul'tate radioaktivnyh vypadenij: 1. Cezij-137 javljaetsja edinstvennym iskustvennym radioizotopom, kotoryj postojanno obnaruzhivalsja pri obsledovanijah s pomoshh'ju schetchika dlja izmerenija aktivnosti vsego organizma. Jevoljucija obshhego srednego soderzhanija izotopa mozhet byt' proslezhena v techenie vsego perioda vremeni, otvedennogo na vse issledovanija. Dopolnitel'no mozhno otmetit' izmenenija, i k tomu zhe obychnye, radioaktivnogo zarazhenija v zavisimosti ot pola. 2. Chto kasaetsja obychno vstrechajushhihsja slabyh aktivnostej, to nam udalos' izuchit' svjaz' mezhdu vydeleniem s mochoj cezija-137 i obshhim soderzhaniem jetogo izotopa v organizme. Rezul

  20. Biological Monitoring for Plutonium-241; Detection du Plutonium-241 par Controles Biologiques; Dozimetriya Plutoniya-241 v biologicheskikh materialakh; Determinacion del Plutonio-241 en Sustancias Biologicas

    Energy Technology Data Exchange (ETDEWEB)

    Dalton, J. C.; McDonald, B. J.; Barnes, V. [United Kingdom Atomic Energy Authority, Windscale Works, Sellafield (United Kingdom)

    1965-10-15

    {pi}. El equipo construido hasta la fecha puede detectar 3 pCi de {sup 241}Pu en un recuento de 1 h. Esta cantidad representa la excretada por la orina durante 24 h a los 3 meses de absorber el 5% de la carga corporal maxima admisible (0,9 {mu}Ci). Seguidamente los discos se analizan para determinar los isotopos del plutonio emisores alfa colocandolos durante una semana sobre una placa nuclear, que se examina visualmente bajo el microscopio. (author) [Russian] Opisyvajutsja proishozhdenie i harakteristiki plutonija-241. Podcherkivajutsja soobrazhenija otnositel'no vreda jetogo jelementa dlja zdorov'ja i problemy ego opredelenija. Opisyvaetsja sistema scheta, vyrabatyvaemaja v nastojashhee vremja v Uindskejle dlja kolichestvennogo opredelenija plutonija-241 maloj aktivnosti v probah, sobiraemyh po programme biologicheskogo dozimetricheskogo kontrolja. Na nastojashhej stadii razrabotki jetot metod po men'shej mere stol' zhe chuvstvitelen, kak opisannye ranee, i obladae't preimushhestvami blagodarja prostote, bystrote i jekonomichnosti. Jetot metod prednaznachen v pervuju ochered' dlja analiza mochi dlja dopolnenija informacii, uzhe poluchennoj posredstvom radioavtograficheskogo analiza al'fa-aktivnyh radioizotopov plutonija. Dlja opredelenija kolichestva plutonija-241 ispol'zuetsja tot zhe samyj diskovyj istochnik, chto pozvoljaet sokratit' podgotovitel'nye raboty. Radioizotopy plutonija prezhde vsego izvlekajut iz proby mochi ili drugogo biologicheskogo materiala v sostojanii bol'shoj radiohimicheskoj chistoty posredstvom anionoobmena. V rezul'tate jelektroliza oni otkladyvajutsja na diske iz nerzhavejushhej stali. Neposredstvennyj otschet mjagkogo beta-spektra plutonija-241 (maksimal'naja jenergija 20 kjev, period poluraspada 13,3 goda) proizvoditsja s pomoshh'ju sistemy antisovpadenij, sostojashhej iz proporcional'nogo schetchika malogo ob{sup e}ma s gazovym potokom i iz zashhity s plasticheskim fosfornym scintilljatorom antisovpadenij. Razmery takovy, chto vse beta

  1. Nucleic Acids and Protein Metabolism of Bone Marrow Cells Studied by Means of Tritiumlabelled Precursors; Etude du Metabolisme des Acides Nucleiques et des Proteines dans les Cellules de la Moelle Osseuse, a l'Aide de Precurseurs Trities; 0418 0437 0443 0414 ; Estudio con Ayuda de Precursores Tritiados del Metabolismo de los acidos Nucleicos y de las Proteinas en las Celulas de la Medula Osea;

    Energy Technology Data Exchange (ETDEWEB)

    Gavosto, F. [Istituto di Clinica Medica Generale e Centro di Studi Fisico-Biologici, Universita de Turin, Turin (Italy)

    1962-02-15

    demostrado que en las celulas normales de la medula osea la razon entre la incorporacion de uridina y la de aminoacidos permanece constante. En los casos de leucemia aguda, la incorporacion de acido ribonucleico y de precursores proteinicos en las celulas leucemicas es siempre sensiblemente mas reducida, aunque varia de un caso a otro. Asimismo, la razon entre la incorporacion de uridina y la de aminoacidos se altera constantemente en estas celulas. El autor estudia la disminucion y disociacion del metabolismo del acido ribonucleico y de las proteinas en las celulas leucemicas (leucemia aguda), relacionando estos fenomenos con la maduracion defectuosa, tipica de estas celulas. (author) [Russian] Obsuzhdajutsja prei- mushhestva ispol'zovanija mechennyh tritiem slozhnyh soedinenij v metodah avto- radiograficheskogo analiza. Dejstvitel'no, jelektrony tritija obladajut maksi- mal'noj jenergiej 0,018 Mjev, chto sootvetstvuet priblizitel'no rasstojaniju 1 mikrona na fotograficheskoj plenke, dostigaja tem samym nailuchshej vozmozh- noj razreshajushhej sposobnosti v masshtabe kletok i ih komponentov. Jeto osobenno polezno pri izuchenii javlenij metabolizma v tkanjah, sostojashhih; kak jeto imeet mestno v kostnom mozge, iz raznovidnostej kletok, nahodjashhihsja na razlichnoj stadii differenciacii. Jetot metod byl ispol'zovan dlja issledovanija metabolizma nukleinovyh kislot i proteina v zdorovyh i porazhennyh lejkemiej kletkah kostnogo mozga. Izuchenie metabolizma dioksiribonukleinovoj kisloty proizvodilos' pri pomoshhi specificheskogo predshestvennika, a imenno timidina tritija. Putem sopostavlenija nahodjashhihsja na odnoj i toj zhe stadii sozrevanija chastic zdoro- vyh i porazhennyh lejkemiej tkanej byli obnaruzheny znachitel'nye rashozhde- nija v procentnyh doljah mechenyh kletok. V chastnosti, v jachejkah, porazhennyh ostroj lejkemiej, nabnjudalos' gorazdo bolee slaboe pogloshhenie timidina, chto prinimalos' za dokazatel'stvo men'shej sposobnosti razmnozhenija jetih kletochek po

  2. Personnel Dosimeters with Radiation Elements; Dosimetres Individuels Comportant des Elements Emetteurs; 0418 041d 0414 0418 0412 0418 0414 ; Dosimetros Individuales Provistos de Elementos Emisores

    Energy Technology Data Exchange (ETDEWEB)

    Hosemann, R.; Warrikhoff, H. F.H. [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin-Dahlem, Federal Republic of Germany (Germany)

    1965-06-15

    neposredstvennye, libo kosvennye sistemy. Pribor neposredstvennogo otscheta soderzhit jelement izluchenija i jelektrometr v tom zhe samom vakuumnom sosude. Otsutstvujut jelektroprovodimye kontakty vneshnej oblicovki pribora. Predpochtenie okazyvaetsja cilindricheskoj i sfericheskoj forme jelementa. Vneshnie razmery pribora ostanutsja temi zhe samymi, chto i u obychno ispol'zuemyh dozimetrov karandashnogo tipa. Kazhdaja sistema sostoit iz jelementnogo kommutatora i bloka upravlenija. (author)

  3. Some Uses of Radioisotopes and Radiations in Entomology; Quelques emplois des radioelements et des rayonnements en entomologie; Nekotorye vidy primeneniya radioehlementov i oblucheniya v ehntomologii; Algunas aplicaciones de los radioelementos y de las radiaciones en entomologia

    Energy Technology Data Exchange (ETDEWEB)

    Courtois, G. [Centre d' Etudes Nucleaires de Saclay (France); Lecomte, J. [Institut National de la Recherche Agronomique, Station de Recherches sur l' Abeille et les Insectes Sociaux, Bures-Sur-Yvette (France)

    1963-09-15

    dosificar el potasio en las hormigas y en las abejas. Los autores han ensayado la marcacion de acrididos con {sup 192}Ir y describen en la memoria los resultados obtenidos. Se ha hecho tambien un estudio de la distribucion de ciertos radioisotopos ( {sup 32}P y {sup 35}S) en el cuerpo de la abeja por medio del metodo autorradiografico. (author) [Russian] Stat'ya soderkhit obzor metodov primeneniya radioehlementov v ehntomologii, razrabotannykh v nashikh dvukh tsentrakh v techenie poslednikh let. Pervye raboty otnosilis' k pchelam i v osobennosti k dal'nosti poletov pchel-sborshchits iz pchelosem'i. Issledovanie provodilos' s pomoshch'yu mecheniya izotopom Au{sup 198}. Prodolzheniem rabot po opredeleniyu dozy, poluchennoj osob'yu v protsesse mecheniya, yavilos' opredelenie radiorezistentnosti pchely i letal'noj dozy, lezhashchej v predelakh 90 000 p. Au{sup 198} byl takzhe ispol'zovan dlya issledovaniya obmena pishchej vnutri ul'ya. Vmeste s tem,dlya izucheniya obmena pishchej vnutri ul'ev mezhdu rabochimi osobyami (muzhskimi osobyami, rabochimi pchelami, matkami) ili mezhdu razlichnymi royami primenyalsya R{sup 92}. Nedavno analogichnye issledovaniya trofilaksii byli provedeny na osakh. Au{sup 188} byl takzhe osnovnym radioehlementom v rabote s muravejnikami. Naibolee interesnym rezul'tatom pervogo issledovaniya yavilos' otkrytie obmena pishchej mezhdu muravejnikami, otstoyashchimi drug ot druga na rasstoyanii svyshe 50 m, i raznymi vidami murav'ev (Formica rufa i Formica polyctena). V protsesse vtorogo issledovaniya, s pomoshch'yu mecheniya puti dvizheniya murav'ev, a ne samogo muravejnika, bylo vyyavleno raspredelenie obyazannostej vnutri muravejnika. Mechenye murav'i sledovali po odnomu i tomu zhe marshrutu i redko obmenivalis' s drugimi osobyami toj zhe kolonii. V protsesse ehtogo opyta uzhe do mecheniya byla ustanovlena anormal'naya radioaktivnost' murav'ev, obuslovlennaya prezhde vsego nalichiem (Sr + Nb){sup 95}. EHto otkrytie govorit o tendentsii k nakopleniyu v

  4. Stability of RNA and DNA in Bone Marrow Cells, Demonstrated with Tritiated Cytidine and Thymidine; Emploi de la Cytidine et de la Thymidine Tritiees pour Demontrer la Stabilite de l'ARN et l'ADN dans les Cellules de la Moelle Osseuse; 0421 0442 0430 0414 ; Estudio de la Estabilidad de los Acidos Ribonucleico y Desoxirribonucleico de las Celulas de la Medula Osea, Utilizando Citidina y Timidina Tritiadas

    Energy Technology Data Exchange (ETDEWEB)

    Bond, V. P.; Feinendegen, L. E.; Cronkite, E. P. [Medical Research Centre, Brookhaven National Laboratory, Upton, Long Island, NY (United States)

    1962-02-15

    actividad del indicador concuerda con las pendientes obtenidas. Dicha velocidad se calculo en funcion de la cinetica de poblaciones celulares de la medula osea de la rata, estudiadas separadamente mediante timidina-{sup 3}H y autorradiografias, suponiendo que la renovacion del ARN y del ADN son nulas y que las perdidas de indicador solo se producen por division y maduracion de las celulas. Los resultados indican que las celulas de la medula osea retienen el ARN soluble y macromolecular, una vez sintetizado, de manera analoga al ADN. El ARN y el ADN recientemente formados solo se diluyen en las celulas por division de las mismas. (author) [Russian] Issledovalsja metabolizm DNK i RNK s ispol'zovaniem tritirovannogo timidina (H{sup 3}Th), special'noj pervichnoj chasticy dlja DNK i tritirovannogo citidina (N{sup 3}Su) obychnoj pervichnoj chasticy kak dlja RNK, tak i dlja DNK. S pomoshh'ju N{sup 3}Su radioavtograficheskim putem v edinoj kletke opredeljalos' differencirovannoe vvedenie v RNK i DNK ili rastvorimoe soedinenie i/ili himicheskim putem differencirovannoj jekstraciej s ispol'zovaniem sootvetstvujushhej obrabotki hlornoj kislotoj - dlja kletochnyh populjacij. Pervichnye issledovanija krugovorota v kletke Hela s pomoshh'ju N{sup 3}Su pokazali rol' pervichnoj chasticy jadernoj RNK dlja citoplazmennoj RNK. Konservacija i raspredelenie indikatora vo frakcii RNK soglaso- valis' s osnovnoj mikromolekuljarnoj stabil'nost'ju RNK, a nepreryvnoe vvedenie indikatora vo- frakciju DNK soglasovalos' s nalichiem poslednej pervichnoj chasticy dlja DNK. Podobnye zhe rezul'taty nabljudalis' v nezrelyh kletkah kostnogo mozga krysy, kotorye iseledovalis' bolee 7 dnej posle vnut- rivennogo vvedenija N{sup 3}Su. Razmer aktivnosti tritija v rastvorimoj kislote, frakcijah RNK i DNK opredeljalsja himicheskim putem i/ili radioavtograficheski. Najdeno, chto tri krivye parallel'nym mezhdusoboj s pervogo dnja posle in{sup e}- kcii i parallel'ny krivym dlja tritievogo indikatora v DNK

  5. Assessment of the Total Body Burden of Caesium-137 in Humans by the Analysis of Blood; Determination de la Charge Corporelle de Cesium 137 chez l'Homme, par Analyse Du Sang; 041e 041f 0420 0415 0414 ; Evaluacion de la Carga Corporal Total de Cesio-137 en el Hombre por Analisis de Sangre

    Energy Technology Data Exchange (ETDEWEB)

    Yamagata, N. [Institute of Public Health, Tokyo (Japan)

    1964-11-15

    en estado de equilibrio. Los resultados referentes al cesio-137 reunidos desde jumo de 1963 mediante los analisis de sangre se han comparado con los obtenidos por analisis de tejidos musculares, efectuados durante el mismo periodo. Se ha observado una concordancia satisfactoria y se estima que los analisis de sangre constituyen el mejor medio para evaluar la carga corporal total de cesio-137 en la poblacion. (author) [Russian] V Japonii proizvoditsja issledovanie soderzhanija cezija-137 v obrazcah, poluchennyh u umershih ljudej, tak kak kolichestvo schetchikov dlja izmerenija radioaktivnosti vsego organizma ogranicheno, a imejushhiesja apparaty nemobil'ny, chto zatrudnjaet opredelenie srednih urovnej zarazhenija naselenija. Odnako poluchenie myshechnoj tkani posle autopsii so vseh koncov strany javljaetsja slozhnym i neudobnym processom, tak kak obrazcy neobhodimo brat' srazu zhe posle smerti. Uchityvaja cennost' lish' takih dannyh dlja opredelenija srednih velichin soderzhanija cezija-137 u ljudej i neobhodimost' znanija individual'nyh velichin, sleduet dobivat'sja poluchenija kombinirovannyh obrazcov dlja analiza ot vozmozhno bol'shego chisla lic. Dlja jetoj celi nailuchshej zamenoj myshc byli priznany obrazcy cel'noj krovi, poskol'ku sistema sbora krovi rasprostranena po vsej strane i ohvatyvaet 47 imejushhih licenziju bankov perelivanija krovi i okolo 100 gospitalej. Proverka obrazcov citratnoj cel'noj krovi proizvoditsja postojanno v Nacional'nom institute zdravoohranenija, Tokio, gde proverjaetsja okolo 500 ampul krovi, poluchennoj ot bolee chem 3 mln.donorov v strane za god. Menee poloviny krovi iz ampuly ispol'zovalos' dlja proverki, a ostavshajasja polovina sohranjalas' dlja prigotovlenija smesi dlja opredelenija urovnja cezija-137. Dlja opredelenija soderzhanija stabil'nogo cezija zolu krovi issledovali s pomoshh'ju nejtronnogo aktivacionnogo analiza. Poluchennye dannye ukazyvajut na nalichie svjazi mezhdu koncentraciej cezija v cel'noj krovi i ego obshhim

  6. Determination of the Uranium Content of Aluminium Alloys; Determination de la Teneur en Uranium dans les Alliages a Base d'Aluminium; Opredelenie soderzhaniya urana v splavakh na osnove alyuminiya; Determinacion del Contenido de Uranio en las Aleaciones a Base de Aluminio

    Energy Technology Data Exchange (ETDEWEB)

    Gerard, J.; Van Hove, L. [S.A. Metallurgie et Mecanique Nucleaires Dessel (Belgium)

    1965-09-15

    determinacion de su contenido exacto de uranio-235 se efectua mediante analisis quimicos e isotopicos. El control, cuando las operaciones se reaUzan a una cadencia industrial, se hace midiendo la densidad de la aleacion o contando los rayos gamma emitidos por el uranio-235. Ambos metodos permiten obtener resultados de una precision relativa comparable ({+-} 0,5%). Desde el punto de vista economico, se puede recomendar la determinacion del contenido por recuento de la emision gamma, siempre que sea necesario llevar a cabo muchos examenes de piezas de una forma determinada. (author) [Russian] Vo mnogih reaktorah dlja ispytanija materialov splav aljuminija i obogashhennogo urana ispol'zuetsja v kachestve topliva. Kolichestvo urana-235 v kazhdom toplivnom jelemente dolzhno byt' tochno izvestno. Ispol'zovannye dlja jetogo opredelenija metody prosty v principe i k tomu zhe raznoobrazny. Privodjatsja sledujushhie metody: izmerenie plotnosti splava, otschet gamma-izluchenija urana-235, himicheskij analiz, opredelenie izotopnogo soderzhanija i ocenka potemnenija radiograficheskogo snimka. K sozhaleniju, kazhdyj iz jetih metodov stradaet bolee ili menee ser'eznymi nedostatkami na praktike, kogda jeto kasaetsja kontrolja vazhnoj produkcii. Izmerenie plotnosti splava metodom Arhimeda daet dostatochno tochnye rezul'taty, esli jetot metod primenjaetsja ostorozhno i esli tochno izvestna plotnost' sostavnyh metallov. Vmeste s tem, na praktike jetot metod javljaetsja ochen' medlennym. Krome togo, nado ochen' tochno znat' izotopnoe soderzhanie, chtoby opredelit' kolichestvo urana-235. Registracija gamma-aktivnosti urana-235 pozvoljaet neposredstvenno davat' ocenku jetomu izotopu. Odnako mnogie parametry odnokanal'nogo spektrometra obuslovlivajut primenenie horosho izvestnyh jetalonov i sozdanija iskljuchitel'noj ustojchivosti registracii. I vse zhe, po nashemu mneniju, jetot metod javljaetsja naibolee celesoobraznym dlja analizov v promyshlennom masshtabe. S drugoj storony, vybor jetalonov

  7. Use of radioisotopes in studying the penetration of sulphur into iron during hydrogen cathode charging; Application des radioelements a l'etude de la penetration du soufre dans le fer lors du chargement en hydrogene cathodique; Ispol'zovanie radioehlementov dlya izucheniya proniknoveniya sery v zhelezo, kogda ona zaryazhaetsya katodnym vodorodom; Aplicacion de los radioelementos al estudio de la penetracion del azufre en el hierro durante la carga con hidrogeno catodico

    Energy Technology Data Exchange (ETDEWEB)

    Besnard, S; Talbot, J [Centre National de la Recherche Scientifique, Vitry (France)

    1962-01-15

    bylo predprinyato v nashej laboratorii s ispol'zovaniem chistogo ehlektroliticheskogo zheleza. Putem katodnoj nagruzki bylo polucheno vodorodnoe perenasyshchenie. EHlementom primesi byl sernistyj natrij, vystupayushchij kak ehlement sera-35. My smogli pokazat' chto v techenie poluchasa pri -15 Degree-Sign C sera pronikaet v zhelezo na glubinu okolo 120 mikronov. K tomu zhe bylo ustanovleno, chto sera preimushchestvenno razmeshchalas' na granulakh zeren. EHtot rezul'tat, kotoryj mog by byt' poluchen tol'ko s pomoshch'yu radioizotopov, imeet vazhnoe znachenie, osobenno v neftyanoj promyshlennosti. Podobnoe issledovanie bylo provedeno s ispol'zovaniem radioizotopa fosfor-32. (author)

  8. Fixation of Radioactive Waste in Glass. Part II. The Experimental Evaluation of Phosphate and Borosilicate Glasses; Fixation des Dechets Radioactifs dans le Verre, Deuxieme Partie: Evaluation Experimentale des Verres au Phosphate et au Borosilicate; 0424 0418 041a 0421 0410 0426 0418 042f 0420 0410 0414 0418 041e 0410 041a 0422 0418 0412 041d 042b 0425 041e 0422 0425 041e 0414 041e 0412 0412 0421 0422 0415 041a 041b 0415 . 0427 0410 0421 0422 042c Ii. 042d 041a 0421 041f 0415 0420 0418 041c 0415 041d 0422 0410 041b 042c 041d 0410 042f 041e 0426 0415 041d 041a 0410 041a 0410 0427 0415 0421 0422 0412 0424 041e 0421 0424 0410 0422 041d 042b 0425 0418 0411 041e 0420 041e 0421 0418 041b 0418 041a 0410 0422 041d 042b 0425 0421 0422 0415 041a 041e 041b ; Fijacion de Desechos Radiactivos en Vidrio, Parte II: Evaluacion Experimental de los Vidrios al Fosfato y al Borosilicato

    Energy Technology Data Exchange (ETDEWEB)

    Elliot, M. N.; Grover, J. R.; Hardwick, W. H. [Atomic Energy Research Establishment, Harwell (United Kingdom)

    1963-02-15

    comme milieu de stockage, en les comparant aux verres au borosilicate. (author) [Spanish] El principal factor que es preciso tener en cuenta al proceder a la eleccion de un vidrio adecuado para almacenar por largos periodos desechos de productos de fision es el metodo de almacenamiento que se va a aplicar; el segundo factor es el grado de seguridad que ofrece la elaboracion del vidrio en un establecimiento de alta actividad. A su vez, los factores que interesan para el almacenamiento son la resistencia a la lixiviacion, la estabilidad termica y a las radiaciones y la proporcion de desechos que se pueden incorporar a la masa vitrea, mientras que las propiedados fisicas y quimicas de los aditivos vitrificantes, asi como el punto de fusion y la viscosidad del vidrio mismo, son factores que intervienen mas bien en el proceso de elaboracion. Los autores examinan la importancia relativa de todos estos factores. Exponen luego los resultados del estudio experimental de los vidrios al borosilicato que se han elegido para, los ensayos en instalacion piloto, incluso el efecto de dosis de radiacion hasta 10{sup 12} rad sobre sus propiedades fisicas y quimicas. Tambien examinaron vidrios de otras composiciones y compararon su posible utilidad, como medio de almacenamiento, con la de los vidrios al borosilicato. (author) [Russian] Steklo dlja dlitel'nogo hranenija othoDov, soderzhashhih produkty delenija, dolzhno vybirat'sja, vo-pervyh s uchetom predpolagaemogo metoda hranenija i , vo-vtoryh, s uchetom vozmozhnosti ego poluchenija na vysokoradioaktivnyh ustanovkah. Vazhnymi faktorami s tochki zrenija hranenija javljajutsja: stojkost' protiv vyshhelachivanjja, teplostojkost' i radiacionnaja stojkost', a takzhe predel'naja dolja vvodimyh othodov; chto zhe kasaetsja fizicheskogo haraktera i himicheskih svojstv jelementov, dobavljaemyh dlja stekloobrajeovanija, a takzhe tochki plavlenija i vjazkosti stekla, to jeti faktory kasajutsja processa izgotovlenija. Obsuzhdaetsja otnositel

  9. Application of radioisotopes to the investigation of the kinetics and mechanism of reactions of some inorganic complex compounds; Application des radioisotopes a l'etude de la cinetique et du mecanisme des reactions de certains complexes inorganiques; Primenenie radioizotopov k issledovaniyam kinetiki i mekhanizma reaktsij nekotorykh neorganicheskikh slozhnykh soedinenij; Aplicacion de los radioisotopos al estudio de la cinetica y del mecanismo de las reacciones de algunos complejos inorganicos

    Energy Technology Data Exchange (ETDEWEB)

    Harris, Gordon M [Department of Chemistry, University of Buffalo, Buffalo 14, NY (United States)

    1962-03-15

    estado de equilibrio, efectuada en la reaccion de intercambio de carbonatos. De la misma manera, los datos relativos al efecto cinetico de los isotopos en la hidratacion del ion Co(NH{sub 3}){sub 4}CO{sub 3}{sup +} catalizada por acidos han corroborado las teorias sobre el caracter de la fase de ruptura de enlaces, que determina la velocidad de estas reacciones. Por ultimo, los experimentos con trazadores radiactivos facilitan frecuentemente el estudio de las posiciones sucesivas de ciertos atomos o radicales en las reacciones inorganicas para las que existen diversas explicaciones teoricamente posibles. Como ejemplo puede citarse la demostracion de que en la oxidacion del ion tiocianato por peroxido de hidrogeno, el cianuro no es un producto intermedio que sufre un intercambio rapido a pesar de que constituye uno de los principales productos finales. (author) [Russian] Ispol'zovanie radioizotopov okazyvaet neotsenimye uslugi pri issledovanii khimicheskikh neorganicheskikh reaktsij samykh raznoobraznykh vidov i, v chastnosti, reaktsij so slozhnymi ionizirovannymi veshchestvami v vodnykh rastvorakh. Odnim iz vazhnykh metodov sluzhit izuchenie skorosti i mekhanizma protsessov izotopnogo obmena. Tak, naprimer, byl proveden ryad issledovanij obmen a mezhdu t.n. ''svobodnym'' karbonatom, mechennym uglerodom-14, i svyazyvayushchim karbonatom oktaehdral'nykh slozhnykh ionov tipa CoA{sub 2}CO{sub 3}{sup +}, gde A = 2 NH{sub 3}, ehtilendiamin (en), propilendiamin (pn) ili trimetilendiamin (tn). EHti issledovaniya priveli k dovol'no tochnomu ponimaniyu kharaktera reaktsij ehtogo roda po zamene svyazi, a takzhe roli v ehtoj reaktsii neuchastvuyushchikh v obmene svyazyvayushchikh aminovykh zven'ev. Analogichnye issledovaniya obmena oksalatov, provedennye so slozhnymi trioaksalatami tipa M (C{sub 2}O{sub 4}){sub 3}{sup -3}, gde M=Co (III), Cr (III) ili Br (III), dali stol' zhe plodotvornye rezul'taty. Drugim metodom, primenimym tol'ko v sluchae ispol'zovaniya radioizotopov s malym

  10. Relative Biological Effectiveness of 14-MeV Fast Neutrons to Co{sup 60} Gamma-Rays in Einkorn Wheat; Efficacite Biologique Relative des Neutrons Rapides de 14 MeV par Rapport aux Rayons Gamma de {sup 60}Co sur l'Engrain; Otnositel'naya biologicheskaya ehffektivnost' bystrykh nejtronov s ehnergiej 14 MeV i gamma-luchej CO{sup 60} pri ikh dejstvii na pshenitsu odnozernyanku; EBR de los Neutrones Rapidos de 14 MeV y de los Rayos Gamma del {sup 60}Co en el Trigo Escanda Menor

    Energy Technology Data Exchange (ETDEWEB)

    Fujii, T. [National Institute of Genetics, Misima (Japan)

    1964-05-15

    , sobrevivio entre 60 y 80% de las plantulas y en los grupos tratados con rayos gamma, la supervivencia fue del 100%. En cambio, en el grupo sometido a la irradiacion neutronica con la dosis mas elevada, solo sobrevivio un 4% de las plantulas. No se observaron mutaciones en el grupo testigo y el numero de plantas que presentaba retonos rayados crecio al aumentar la dosis de ambos tipos de radiacion. Se observaron retoflos con mutaciones en un 15% de las plantas sobrevivientes tratadas con la dosis inferior de neutrones y la misma frecuencia se registro para la dceis mayor de rayos gamma. Al parecer, la EBR de los neutrones de 14 MeV con respecto a los rayos gamma de {sup 60}Co, para la mutacion somatica, es 20 como minimo. (author) [Russian] Avtor izuchal OBJe nejtronov s jenergiej 14 Mjev i gamma-luchej Sobo pri ih dejstvii na pshenicu odnozernjanku s pomoshh'ju special'nogo lokusnogo metoda. Dlja opyta ispol'zovalis' semena generacii F{sub 1} gibrida mezhdu ishodnym sortom i mutantom Chlorina (mutant Chlorina byl poluchen kak edinstvennyj recessivnyj rentgenomutant; ot stadii sejanca do nastuplenija spelosti on byl odnorodno svetlozelenym s otnositel'no vysokoj vyzhivaemost'ju i urozhajnost'ju). U rastenij F{sub 1} byla normal'naja zelenaja okraska i normal'nyj harakter rosta. Pokojashhiesja semena Ft obluchali bystrymi nejtronami v dozah 0,5, 1,0 i 1,4 krad i gamma-luchami v dozah 4,3 8,6 i 12,9 krad. Mutacii ot dominantnyh normal'nyh zelenyh do Chlorina nabljudalis' posle oboih vidov obluchenija i pojavljalis' v list'jah i stebljah geterozigotnyh rastenij X{sub 1} v vide prodol'nyh polos. Okolo 80% semjan vzoshlo na kontrol'nyh uchastkah i na uchastkah posle obluchenija ca- mymi nizkimi dozami nejtronov i gamma-luchej, procent vshozhesti postepenno snizhalsja s povysheniem dozy pri oboih vidah obluchenija. Krome togo, takaja zhe tendencija nabljudalas' i na rannih stadijah rosta sejancev, kotoryj postepenno tormozilsja s povysheniem dozy. Soglasno jetim dannym nejtronnoe

  11. Techniques Which Aid in Quantitative Interpretation of Scan Data; Methodes Facilitant l'Interpretation Quantitative des Scintigrammes; Metody, oblegchayushchie kolichestvennuyu interpretatsiyu dannykh skennirovaniya; Tecnicas Que Facilitan la Interpretacion Cuantitativa de los Datos Centelleograficos

    Energy Technology Data Exchange (ETDEWEB)

    Charleston, D. B.; Beck, R. N.; Eidelberg, P.; Schuh, M. W. [Argonne Cancer Research Hospital, Chicago, IL (United States)

    1964-10-15

    jelektronnyh pereschetnyh us troj stv . Neposredstvennyj i chrezvychajno poleznyj metod ispol'zovanija generatora besporjadochnyh impul'sov sluzhit dlja nanesenija kalibrovannyh ustupchato-klinoobraznyh otmetok, kotorye proektirujutsja na plenku t em zhe samym istochnikom sveta, kotoryj ispol'zuetsja vo vremja skennirovanija; jeto daet vozmozhnost' prosmotrovoj golovke sravnivat' plotnost' obluchenija izuchaemyh zon skennirovanija s analogichnymi zonami na klinoobraznyh otmetkah, kotorye kalibrovany neposredstvenno v edinicah skorosti scheta. Vspomogatel'noe oborudovanie, kak naprimer mnogokanal'nyj analizator, ispol'zuemyh pri sposobe mnozhestvennyh schetov, pozvoljaet nakopljat' cifrovuju informaciju dlja poluchenija 'obshhego chisla schetov na strochku skennirovanija'' dlja kazhdogo shaga pokazatelja. Bylo provedeno skennirovanie melkih zhivotnyh, kotoroe pozvolja et nakopljat' dannye i davat' ''chislo schetov na strochku skennirovanija'' dlja kazhdogo shaga pokazatelja. Jeto da et tochnoe kolichestvennoe izmerenie raspredelenija aktivnosti v tele zhivotnogo, a takzhe izobrazhaet profil' aktivnosti, analogichnyj tomu, kotoryj poluchaetsja pri shhelevom linejnom skennirovanii. Tot zhe samyj metod mnozhestvennyh schetov primenja etsja idale e putem nakoplenija chislennoj informacii dlja poluchenija {sup c}hisla schetov na edinicu ploshhadi{sup .} Dlja kazhdoj strochki skennirovanija kazhdogo shaga pokazatelja poluchaetsja otdel'naja krivaja profilja. Jeto daet vozmozhnost' opredeljat' skorost' scheta ili stroit' sootvetstvujushhij profil' dlja kazhdoj ploshhadi. Pokazanija skennirovanija s usileniem kontrasta ili beznego, a takzhe s ''otstavaniem'' ili bezne go v integrirujushhem konture diagrammy skennirovanija s razlichnymi razmerami i formami pjaten byli polucheny v identichnyh statisticheskih uslovijah pri pomoshhi m no go kratnogo skennirovanija fantoma odnim detektorom . Neposredstvennoe sravnenie jetih pokazanij sovmestno s metodom sostavlenija grafikov {sup c

  12. Handling and Separation of Short-Lived Radioisotopes from Research Reactors; Manipulation et Separation des Radioisotopes a Courte Periode Produits dans des Reacteurs de Recherche; ПОЛУЧЕНИЕ И ОТДЕЛЕНИЕ КОРОТКОЖИВУЩИХ ИЗОТОПОВ В ИССЛЕДОВАТЕЛЬСКИХ РЕАКТОРАХ; Manipulacion y Separacion de Radioisotopos de Periodo Corto Obtenidos en Reactores de Investigacion

    Energy Technology Data Exchange (ETDEWEB)

    Meinke, W. W. [University of Michigan, Ann Arbor, MI (United States)

    1963-03-15

    iz-za udalennosti ot snabzhavshego reaktora chasto ogranichivalos' temi, kotorye imeet period poluraspada bol'she odnogo dnja. Jeto tormozilo issledovanija v oblasti proizvodstva i primenenija radioizotopov voobshhe i v to zhe vremja meshalo potrebitele tochno ocenit' vozmozhnosti mnogih korotkozhivushhih izotopov. V svjazi s nalichiem vo vsem mire issledovatel'skih reaktorov jeta zavisimost' ot mesta proizvodstva izotopov mozhet predstavljat' soboj izvestnuju trudnost', no v to zhe vremja ona daet vozmozhnost' provodit' rjad novyh jeksperimentov s korotkozhivushhimi izotopami. Dlja jetogo trebuetsja vplotnuju podojti k voprosam proizvodstva mechenyh atomov. Pochti v techenie pjati let programma raboty ka issledovatel'skom reaktore Michiganskogo universiteta vkljuchala obrabotku, pererabotku i izmerenie korotkozhivushhih izotopov. Obychno pol'zovalis' izotopami, prodolzhitel'nost' poluraspada kotoryh ravnjalas' chasam i dazhe minutam. Hotja v dannom sluchae glavnye usilija byli napravleny na issledovanija v oblasti aktivacionnogo analiza, ispol'zovavsheesja oborudovanie i metodika mogut byt' primeneny i dlja drugih issledovanij. Dlja poluchenija korotkozhivushhih izotopov ne objazatel'no imet' sovershennoe oborudovanie, bol'shie zapasy izotopov ili podderzhivat' trehsmennuju rabotu reaktora. Pri uverennom obrashhenii s prostymi manipuljatorami mozhno poluchit' luchshie rezul'taty, chem distancionnym upravleniem. Osnovoj sistemy, opisyvaemoj v doklade, javljaetsja prisposoblenie v vide pnevmaticheskoj truby, kotoraja dostavljaet obrazcy v vytjazhnoj kolpak laboratorii, primykajushhej k reaktoru, v techenie treh sekund posle obluchenija. Rastvorenie i bystroe otdelenie radiohimicheskim sposobom mozhet proizvodit'sja bez dal'nejshego peremeshhenija obrazca. Metody otdelenija, legko prisposablivaemye dlja kratkovremennoj shkaly (neskol'ko minut), vkljuchajut ne tol'ko selektivnuju jekstrakciju, anionnyj obmen i osazhdenie, no i takie novye metodiki, kak izotopnyj obmen i

  13. Non-Destructive Methods for Determining Burn-Up in Nuclear Fuel; Methodes Non Destructives d'Evaluation du Taux de Combustion dans le Combustible Nucleaire; Metody opredeleniya vygoraniya v yadernom toplive bez razrusheniya obraztsa; Metodos No Destructivos para Determinai el Grado de Combustion de los Elementos Combustibles Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    McGonnagle, W. J. [Illinois Institute of Technology, Chicago, IL (United States)

    1966-02-15

    jadernyh reaktorah bez razrushenija obrazca javljajutsja poleznymi i zhelatel'nymi. Ideal'nym byl by metod, ne trebujushhij special'nyh dannyh o nejtronnom spektre, istorii radiacii ili vremeni ohlazhdenija. Obluchennye toplivnye jelementy sami po sebe javljajutsja nositeljami informacii o stepeni vygoranija topliva. Jeta informacija soderzhitsja v forme radioaktivnyh i stabil'nyh izotopov, obrazujushhihsja v processe delenija. K sozhaleniju,kak pri metodah analiza topliva bez razrushenija obrazca, tak i s razrusheniem obrazca nejtronnyj spektr, istorija radiacii i period ohlazhdenija vlijajut na jetu informaciju. Tochno tak zhe nedostatok tochnyh jadernyh dannyh, takih, kak znachenija jadernyh poperechnyh sechenij, vlijaet na ljubye vychislenija, kotorye mozhno bylo by proizvesti. Drugoj trudnost'ju pri analizah bez razrushenija obrazca javljaetsja nalichie polej vysokoj radiacii, kotoraja vnosit dopolnitel'nyj ''shum'' v fon pri izmerenijah. Razrabotka poleznyh i real'nyh standartov javljaetsja trudnym delom. Metody analiza stepeni vygoranija bez razrushenija obrazca osobenno polezny togda, kogda trebuetsja bystro i jekonomichno, dazhe pri sushhestvujushhem polozhenii s ih nedostatkom, poluchit' zhelatel'nuju tochnost' priblizitel'noj velichiny vygoranija. Ispol'zovalos' neskol'ko metodov dlja opredelenija stepeni vygoranija bez razrushenija obrazca; vedetsja ih ocenka ili oni predlagajutsja. Ispol'zovalis' razlichnye tipy spektrometrov, v tom chisle spektrometry s izognutym kristallom, magnitnyj komptonovskij spektrometr, komptonovskij spektrometr na sovpadenija i scintilljacionnyj spektrometr dlja analiza gamma-izluchenija radioaktivnogo materiala, obrazujushhegosja vo vremja processa delenija. Drugie metody analiza bez razrushenija obrazca vkljuchajut aktivaciju fol'gi, propuskanie nejtronov, aktivacionnyj analiz, izmerenie zahvata gamma-luchej i izmerenie mgnovennyh i zapazdyvajushhih nejtronov. Rassmatrivajutsja osnovnye principy kazhdogo iz vyshenazvannyh metodov i

  14. Lens Opacification in Mice Exposed to Monoenergetic Fast Neutrons; Opacite du Cristallin chez la Souris Exposee aux Neutrons Rapides; Katarakty u myshej, obluchennykh monoehnergeticheskimi bystrymi nejtronami; Opacidad del Cristalino en los Ratones Expuestos a los Neutrones Rapidos Monoenergeticos

    Energy Technology Data Exchange (ETDEWEB)

    Bateman, J. L.; Bond, V. P.; Rossi, H. H. [Medical Research Center, Brookhaven National Laboratory, Upton, NY (United States); Radiological Research Laboratory, Department of Radiology, Columbia University, New York, NY (United States)

    1964-05-15

    treh pri 1,80 Mjev. Issledovanija s opredeleniem umen'shenija kolichestva spermatogoniev obnaruzhili neskol'ko bolee vysokie velichiny OBJe, no takoe zhe snizhenie pri uvelichenii jenergii nejtronov. V tom zhe diapazone jenergij nejtronov izuchalos' tormozhenie metabolizma nukleinovoj kisloty v kishechnike i kostnom mozgu, prichem polucheny bolee nizkie velichiny OBJe. V jetih issledovanijah jeffektivnost' nejtronov byla priblizitel'no proporcional'na raschetnoj (srednjaja jenergija) LPJe. Takoe pozdnee projavlenie, kak obrazovanie katarakty, obychno rassmatrivaetsja kak funkcija jenergii nejtronov, prichem 0,43 Mjev okazyvaetsja bolee jeffektivnoj velichinoj jenergii, chem, 1,80 Mjev. Ispol'zovanie peresmotrennoj metodiki s shhelevoj lampoj pozvoljalo obnaruzhivat' pomutnenie v rannej stadii pri otnositel'no nizkih dozah radiacii. Izuchalis' mehanizmy vosstanovlenija v razlichnyh kletochnyh sistemah pri obluchenii monojenergeticheskimi nejtronami i rentgenovskimi ili gamma-luchami. Izuchajutsja hromosomnye narushenija u myshej, podvergnutyh gamma-oblucheniju pri moshhnosti doz ot 0,2 rad do 100 rad/min po chastote pojavlenija patologicheskih anafaz v regenerirujushhej pecheni cherez 3 mesjaca posle obluchenija. (author)

  15. Optical Density Control of Autoradiographs After Photographic Processing (Preliminary Results); Controle de la Densite Optique des Autoradiogrammes Apres Developpement Photographique. (Resultats Preliminaires); Regulirovanie opticheskoj plotnosti avtoradiogramm posle fotoobrabotki; Control de la Densidad Optica de las Autorradiografias Despues del Tratamiento Fotografico. (Resultados Preliminares)

    Energy Technology Data Exchange (ETDEWEB)

    Baptista, A. M. [Comissao de Estudos de Energia Nuclear, Instituto de Alta Cultura, Lisbon (Portugal); Terrinha, A. [Instituto Portugues de Oncologia, Lisbon (Portugal)

    1965-10-15

    ) [Russian] Vo mnogih- sluchajah primenenija fotojemul'sij celesoobrazno regulirovat' opticheskuju plotnost' posle fotograficheskoj obrabotki. Jeto sleduet delat', naprimer, pri izuchenii opredelennyh problem fotograficheskoj dozimetrii, i osobenno vo mnogih sluchajah primenenija avtoradiografii v medicine i biologii. Pri jetom mozhno poluchit' informaciju, nesmotrja na perederzhku, kotoraja neizbezhno proishodit v nekotoryh sluchajah, v chastnosti, kogda v odnih i teh zhe avtoradiograficheskih obrazcah nabljudajutsja vazhnye variacii plotnosti zeren. Soobshhaetsja o pervyh rezul'tatah popytki regulirovat' plotnost' zerna posle projavlenija i zakreplenija fotograficheskogo materiala putem korrodirovanija obrabotannoj jemul'sii s pomoshh'ju razbavlennyh rastvorov tripsina. Izmenjaja koncentracii i temperaturu, mozhno regulirovat' po zhelaniju skorost' processa korrozii, i takim obrazom rastvor tripsina dejstvuet v kachestve ul'tramikrotoma, udaljaja tonchajshie sloi fotograficheskoj jemul'sii. Bolee togo, jetot process mozhno nabljudat' pod mikroskopom s pomosh'ju podhodjashej kameoy. Privodjatsja rezul'taty, kotorye govorjat o tom, chto s pomoshh'ju jetogo metoda mozhno sostavit' priblizitel'noe predstavlenie o vvedenii so vremenem radioizotopa v nabljudaemuju biologicheskuju strukturu. (author)

  16. A general-purpose pulse amplifier; Amplificateur d'impulsions universel; Universal'nyj usilitel' impul'sov; Amplificador de impulsos para uso general

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, K B [Forsogsanlaeg Riso, Roskilde (Denmark)

    1962-04-15

    usilitelej''. Putem ispol'zovaniya odnogo osnovnogo usilitelya, no s razlichnymi skhemami obratnoj svyazi, primenenie ehtogo metoda daet vozmozhnost' poluchat' predvaritel'nye usiliteli i osnovnye usiliteli s nailuchshimi vozmozhnostyami preobrazovaniya impul'sov i v otnoshenii predstavlyayushchikh naibol'shij interes parametrov, takikh kak, naprimer, kharakteristika linejnosti, ustojchivosti i peregruzki. Tak kak ehtot metod trebuet ispol'zovaniya parallel'noj obratnoj svyazi, to on osobenno khorosho podkhodit dlya predvaritel'nykh usilitelej, tak kak bol'shaya chast' detektorov yavlyaetsya v to zhe samoe vremya generatorami toka. Opisyvaetsya usilitel', dejstvuyushchij v kachestve operatsionnogo usilitelya. Naibolee vazhnymi spetsifikatsiyami yavlyayutsya: usilenie v 90 dB ot postoyannogo toka - 10 kgts, padayushchee zatem priblizitel'no po 20 dB na dekadu do dostizheniya 15 mgts (usilenie v 30 dB). S ehtim usilitelem ispol'zuyutsya chetyre lampy. Dlya bol'shinstva operatsij preobrazovaniya impul'sov potrebnost' v stabilizirovannom istochnike ehlektroehnergii otpadaet, a ustojchivost' budet zaviset' isklyuchitel'no ot ustojchivosti ispol'zovannoj skhemy obratnoj svyazi. (author)

  17. Demountable 4 {pi} Geiger Counters for Standardization and the Assay of Low-Activity Samples; Compteurs 4 {pi} GM demontables pour l'etalonnage et l'essai d'echantillons de faible activite; S'emnye schetchiki Gejgera na 4 {pi} dlya standartizatsii i otsenki prob nizkoj aktivnosti; Condatores GM 4 {pi} para la normalizacion de patrones radiactivos con baja actividad

    Energy Technology Data Exchange (ETDEWEB)

    Trott, N G; Bentley, R E; Burton, L K [Physics Department, Institute of Cancer Research, Royal Cancer Hospital, London, S. W. 3 (United Kingdom)

    1960-06-15

    radioaktivnym i materialami. V dvukh vidakh schetchikov na 4 {pi}, kotorye rassmotreny v dannom dokumente, anodnye provoda legko snimayutsya, blagodarya chemu oblegchaetsya chistka. Odin iz schetchikov uspeshno ispol'zovalsya v techenie ryada let dlya standartizatsii {beta}-izluchayushchikh radioaktivny kh nuklidov, i v dokumente privodyatsya nekotorye rezul'taty sopostavleni ya standartov so standartami, poluchennymi drugimi laboratoriyami . EHtot schetchik ispol'zovalsya takzhe vmeste s {gamma} ioniziruyushchej sistemoj dlya opredeleniya {gamma} izluchenij Fe{sup 59}, Cs{sup 137} i Ir{sup 192}. Drugoj schetchik yavlyaetsya schetchikom nizkogo fona. On ustroen tak zhe kak i vysheukazanny j schetchik, izgotovlen iz nerzhaveyushchej stali i prednaznachen glavnym obrazom dlya otsenki nebol'shikh kolichestv radioaktivnosti v organicheskikh veshchestvakh. On mozhet takzhe byt' prisposoblen dlya absolyutnogo izmereniya radioaktivny kh istochnikov na malykh skorostyakh scheta ({<=}100 otschetov v minutu), poskol'ku mozhno poluchit' stabil'nyj fon (1-2 scheta v minutu), esli odnovremenno dlya scheta nesovpadenij ispol'zovat' schetchiki kosmicheskikh luchej. (author)

  18. Neutron Tests at the Start-Up of EDF1; Les essais neutroniques au demarrage du reacteur EDF1; Nejtronnye izmereniya pri puske reaktora EDF1; Ensayos neutronicos efectuados durante la puesta en marcha del reactor EDF1

    Energy Technology Data Exchange (ETDEWEB)

    Teste du Bailler, A. [Centre d' Etudes Nucleaires de Saclay (France); Janin, R. [Electricite de France, Paris (France)

    1963-10-15

    ehksperimental'nykh metodov, razrabotannykh na reaktorakh v Markule, byla provedena vo vremya puska reaktora EDF.1. Izmereniya kasalis' glavnym obrazom ehffektivnosti upravlyayushchikh sterzhnej pri razlichnykh p ogruzh eniyakh. Opredelyaetsya skhema pod''ema s terzhnej, kotoraya pozvolyaet poluchat' polnuyu moshchnost' prk soblyudenii opredelennykh ogranichenij v temperature obolochek i gaza. Parallel'no byli provedeny izmereniya potoka pri razlichnykh polozheniyakh kompensiruyushchikh sterzhnej i pri razlichnykh zagruzkakh poglotitelej v opredelennykh kanalakh, v zavisimosti ot predvaritel'nykh raschetov v dvukhraehmernom izmerenii. Ehti izmereniya byli polucheny putem aktivatsii tochechnykh detektorov s primeneniem obychnogo metoda otravleniya vozdukha. Pri nekotorykh urovnyakh temperatury (do 140{sup o}C) byli provedeny izmereniya koehffitsientov reaktivnosti i ehffektivnosti reguliruyushchikh sterzhnej. V to zhe vremya putem aktivatsii sootvetstvuyushchikh detektorov (uran, plutonij, lyutetsij, marganets, indij, zoloto) byli provedeny izmereniya koehffitsientov spektra. Dlya izmereniya ehffektivnosti nekotorykh kompensiruyushchikh sterzhnej byl ispol'zovan ostsillyatsionnyj metod. Nakonets, s tselyakh izucheniya zashchity i povrezhdeniya grafita byli provedeny izmereniya potoka bystrykh nejtronov. (author)

  19. Comparative Studies of Chemical Effects following Nuclear Reactions and Transformations on Metal Organic Phenyl Compounds; Etudes Comparatives des Effets Chimiques Induits par les Reactions et les Transformations Nucleaires sur des Composes Phenylmetalliques; 0421 0420 0410 0414 ; Estudios Comparativos de los Efectos Quimicos de las Reacciones y Transformaciones Nucleares en Compuestos Fenil-Organometalicos

    Energy Technology Data Exchange (ETDEWEB)

    Merz, E.; Riedel, H. J. [Kernforschungsanlage, Juelich, Federal Republic of Germany (Germany)

    1965-04-15

    retroceso secundarios (interacciones elasticas e inelasticas), entre ellas la influencia peculiar del oxigeno. (author) [Russian] Izuchenie himicheskih jeffektov, sozdavaemyh v processe jadernyh reakcij atomami otdachi bol'shoj jenergii v tverdyh telah i zhidkostjah, provodilos' na osnovanii shirokogo sopostavlenija produktov, obrazovannyh reakcijami (p,{gamma}) i (p, 2p) v soedinenijah fenila s metallami , kak to: germaniem, olovom, svincom, mysh'jakom i sur'moj. V dopolnenie k jetomu radioaktivnye produkty otdachi, obrazovannye posle K-zahvata na tetrafenile germanija-68, sravnivajutsja s rezul'tatami reakcii (p,7) na trifenile gallija i reakcii (p, {gamma}) na tetrafenile germanija. Nakonec, jeto issledovanie rasprostranilos' na {beta}{sup -}-perehod tetrafenila germanija-77 v mysh'jak-77. S pomoshh'ju razlichnyh metodov otdelenija, naprimer, hromatografii adsorbcii na glinozeme, ionnogo obmena i jelektroforeza byli otdeleny razlichnye radioaktivnye produkty otdachi i opredeleny vyhody kazhdogo iz nih. Ustanovleno, chto v jadernyh reakcijah soedinenij vysheupomjanutyh metallov, imejushhih odinakovuju strukturu svjazej, obrazujutsja pochti te zhe kategorii produktov otdachi. Odnako raspredelenie vyhodov obnaruzhivaet harakternye rashozhdenija mezhdu reakcijami (p,{gamma}) i reakcijami (p, 2p). Obnaruzhivaetsja tol'ko neznachitel'noe vlijanie obluchenija na vyhody pri vozdejstvii ego sootvetstvenno na zhidkosti i rastvory. Porazhajut znachitel'nye rashozhdenija, obnaruzhivaemye dlja novyh soedinenij, poluchennyh v rezul'tate jadernyh prevrashhenij; jeti rashozhdenija kasajutsja ne tol'ko vida tipichnyh produktov, no takzhe i procentnoj doli ih vyhoda. Tak, naprimer, rjad produktov otdachi germanija i gallija metalloorganicheskogo haraktera byli obnaruzheny v jadernyh reakcijah na tetrafenile germanija-77, chego vovse ne nabljudalos' pri processah K-zahvata na tetrafenile germanija-68. {beta}{sup -}-raspad na tetrafenile germanija-77 vedet k obrazovaniju pochti takih zhe

  20. Standardization of Radionuclides in the Electrotechnical Laboratory, Tokyo; Etalonnage des radionuclides au Laboratoire d'electrotechniqu e de Tokyo; Standartizatsiya radioizotopov v ehlektrotekhnichesko j laboratorii v Tokio; Normalizacion de radionuclidos en el Laboratorio de Electrotecnica de Tokio

    Energy Technology Data Exchange (ETDEWEB)

    Naito, Masashi; Inouye, Yajiro; Yura, Osamu [Electrotechnical Laboratory, Tokyo (Japan)

    1960-06-15

    izmerenii aktivnosti bylo vzyato ochen' malen'koe kolichestvo (50 mg) obraztsa na tonkoj plenke. Ono bylo vysusheno v silikagel'nom sushil'nom vakuum-kotle. Zatem obrazets byl vyparen snova. Tonkaya plenka byla poluchena v rezul'tate togo, chto sinteticheskaya smola, pokryvavshaya vodnuyu poverkhnost', byla perenesena na metallicheskoe kol'tso i zatem pokryta ochen' tonkim sloem zolota s pomoshch'yu vyparivaniya v vakuume. Izotopy Sr{sup 90} - Y{sup 90}, So{sup 60} i Cs{sup 137} byli izmereny vysheupomyanuty m sposobom. Tochnost' izmerenij sostavlyala {+-} 2%. 2) Metod 2 ya a({pi}) ({alpha})-scheta. Obraztsy RaD + E + F, U{sup 238} i Ro{sup 210} byli izmereny s pomoshch'yu tekh zhe apparatov, kotorye primenyalis' pri metode 4 ({pi}) ({beta})-scheta. Tochnost' izmereniya sostavlyala {+-}2, {+-} 1 i + 1% sootvetstvenno. 3) Vychislenie metodom, osnovannom na printsipe sovpadenij. Pri pri- menenii ehtogo metoda byli ispol'zovany metody ({beta})-({gamma}) i ({gamma})-({gamma}) scheta. Stsintillyatsionny j schetchik [Nal (TI), 1'' ({Phi}) X 1''] byl ispol'zovan v ka- chestve detektora u-luchej, a schetchik Gejgera-Myuller a - kak detektor ({beta})-uchej. Nedavno dlya togo chtoby issledovat' sushchestvuyushchee razlichie mezhdu vychisleniem metodom 4({pi}) ({beta}) -scheta i metodom, osnovannom na printsipe sovpadenij, my vmesto schetchika Gejgera-Myuller a skonstruiroval i spe- tsial'nyj tip proportsional'nog o 4 ({pi}) ({beta}) -schetchika, kotoryj mozhet, krome togo, byt' ispol'zovan v kachestve proportsional'nog o 4 ({pi}) ({beta})-schetchika nezavisimo ot skhem sovpadenij. Rezul'taty, poluchennye metodom, osnovannym na printsipe sovpadenij, dlya ({beta})-({gamma}) -u izluchenij v obshchem neskol'ko otlichalis' (na 3-4%) ot rezul'tatov metoda vychisleniya 4 ({pi}) ({beta})-scheta. EHto mozhet proizojti blagodarya samopogloshcheniyu . S drugoj storony, rezul'tat dlya So{sup 60}, poluchennyj za schet metoda, osnovannogo na printsipe sovpadenij dlya ({gamma})-({gamma}) izluchenij

  1. 100-Mc counting system; Ensemble de comptage a 100 megacycles; Schetnaya sistema na 100 megatsiklov; Sistema contador de 100 megaciclos

    Energy Technology Data Exchange (ETDEWEB)

    Sugarman, R; Higinbotham, W A; Yonda, A H [Brookhaven National Laboratory, Upton, Long Island, NY (United States)

    1962-04-15

    vklyucheniya toka s tranzistorami i germanievymi tunnel'nymi diodami. Vse kriticheskie skhemy imeyut vremya narastaniya i razbros vremeni v razmere dvukh nanosekund i menee. K logicheskim ehlementam otnosyatsya ogranichitel' amplitudy impul'sov, diskriminator, mnogokanal'naya skhema sovpadenij, chetyrekhkratnyj raspredelitel' impul'sov i shkala na 8 delenij. Rasshivatel' pozvolyaetogranichitelyu ili vykhodu diskriminatora sozdavat' lyubye kombinatsii chetyrekh ehlementov. Kazhdyj ehlement predstavlyaet soboj otdel'nyj smennyj modul'. EHlementy vzaimosvyazany s kabelem na 50 om ne menee, chem s odnoj zamykayushchej skhemoj. Bol'shinstvo modul'nykh vkhodov i vykhodov sovmestimy, i diskriminator, naprimer, mozhet libo privodit' v dvizhenie skhemu sovpadenij, libo privodit'sya v dvizhenie po skheme sovpadenij s pomoshch'yu vklyuchayushchikh kabelej. Dlya obespecheniya raboty na bol'shoj skorosti, a takzhe khoroshej stabil'nosti po vremeni i temperature, tranzistory rabotayut na edinom zaryadnom usilenii libo v vide vklyucheniya toka, libo v linejnom vide kak rasprostranennyj usilitel'. Kazhdyj tunnel'nyj diod obespechivaet dopolnitel'noe vklyuchaemoe zaryadnoe usilenie v razmere ot 2 do 5 s takoj zhe stabil'nost'yu i polosno-propusknym ustrojstvom v kachestve tranzistorov. Kazhdyj modul' prednaznachen dlya ispol'zovaniya do postoyannoj skorosti scheta v razmere 100 megaimpul'sov v sekundu. Vysokie rabochie tsikly sistemy yavlyayutsya vozmozhnymi blagodarya vzaimosvyazyam postoyannogo toka i blagodarya ogranicheniyu dvojnoj linii zaderzhki s tsel'yu vosstanovleniya mezhdu impul'sami. Dlya skorostej scheta do 50 megatsiklov ne predpolagaetsya nikakoj poteri pri rabote sistemy. Bazisnyj diskriminator imeet chuvstvitel'nost', kotoruyu mozhno prisposobit' dlya 2-10 milliamper so sparennym vykhodom postoyannogo toka v razmere 10 milliamper pri potentsiale zemli. Vremya narastaniya i padeniya na vykhode sostavlyaet 1 nanosekundu; shirina impul'sa ustanavlivaetsya s pomoshch'yu kabelya

  2. A modification of the method for determining current efficiency of aluminium electrolytic cells; Modification de la methode permettant de determiner le rendement des cuves dans la production d'aluminium par electrolyse; Izmenenie metoda opredeleniya ehffektivnosti toka v alyuminievykh ehlektroliticheskikh bakakh; Modificacion del metodo para determinar el rendimiento de las celdas utilizadas en la produccion de aluminio por electrolisis

    Energy Technology Data Exchange (ETDEWEB)

    Pradzynski, A [Institute of Basic Technical Problems, Polish Academy of Sciences. Warsaw (Poland); Orman, Z [Institute of Nonferrous Metals, Gliwice (Poland)

    1962-01-15

    alyuminievykh pechakh, opisannyj vpervye REMPELEM i dr., byl usovershenstvovan BOZUKI i dr. pri pomoshchi ispol'zovaniya radioaktivnogo izotopa zolota Au{sup 198}. Pri provedenii upomyanutogo issledovaniya byli izgotovleny obraztsy splavov alyuminiya s zolotom Au{sup 198}, i proby ehtikh obraztsov s vysokoj udel'noj aktivnost'yu byli izmereny pri pomoshchi schetchika Gejgera-Myullera so svintsovym poglotitelem, vstavlennym mezhdu schetchikom i proboj. Udel'naya aktivnost' obraztsa splava byla izmerena posle razbavleniya ego opredelennym kolichestvom chistogo alyuminiya. Takim obrazom proby razbavlennogo splava i proby, vzyatye iz ehlektroliticheskogo baka, imeli udel'nuyu aktivnost' togo zhe poryadka velichiny i mogli izmeryat'sya bez vsyakogo poglotitelya. Dlya togo, chtoby oblegchit' primenenie ehtogo metoda na alyuminievom zavode i vo izbezhanie vsyakikh ogranichenij i opasnosti, svyazannykh s obrashcheniem s otkrytymi radioaktivnymi istochnikami vne osobykh laboratorij, prednaznachennykh dlya issledovaniya radioaktivnykh izotopov, byl ispol'zovan radioaktivatsionnyj analiz. K obraztsu splava, a takzhe i v nakhodyashchuyusya v ehlektroliticheskom bake plavil'nuyu vannu bylo dobavleno neaktivirovannoe zoloto. Kontsentratsiya zolota kak v obraztsakh splava, tak i v plavil'noj smesi byla zatem izmerena posle oblucheniya prob v yadernom reaktore. (author)

  3. Measurement of the wear rate of cast grinding balls using radioactive tracers; Evaluation de l'usure des boulets pour concasseurs, au moyen des indicateurs radioactifs; Izmerenie skorosti iznosa litykh drobil'nykh sharov pri pomoshchi mechenykh atomov; Medicion de la velocidad de desgaste de bolas trituradoras de acero colado con ayuda de indicadores radiactivos

    Energy Technology Data Exchange (ETDEWEB)

    Keys, J D; Eichholz, G G [Department of Mines and Technical Surveys, Ottawa, ON (Canada)

    1962-01-15

    broyeur ayant une charge normale d'environ 75 tonnes et des echantillons ont ete preleves a des intervalles d'une semaine pour la recuperation des boulets radioactifs. Ces boulets etaient alors inspectes et peses, apres quoi on a pu calculer leur taux d'usure. Cette methode s'est revelee tres pratique. pour l'etude de la resistance des boulets a l'usure dans les conditions habituelles d'utilisation. (author) [Spanish] La velocidad de desgaste de las bolas trituradoras empleadas en los molinos suele ser dificil de determinar durante el funcionamiento de la maquina, y solo se poseen escasos conocimientos acerca de los factores que determinan su vida util. Los autores utilizaron con exito indicadores radiactivos para marcar bolas de acero colado, con miras a obtener informacion sobre su vida util en diversas condiciones de empleo y compararlas con otras bolas de composicion o tipo distintos. Tomaron un juego de bolas de acero marcadas, y observaron su comportamiento a lo largo de varias semanas de empleo en el molino, obteniendo asi datos estadisticos sobre el desgaste y la perdida de peso sufridos. En las pruebas experimentales anadieron {sup 60}Co al metal fundido antes de colarlas bolas y observaron su comportamiento utilizandolas en una mina de hierro y en otra de oro. Emplearon las bolas marcadas en un molino cuya carga normal es de 75 toneladas aproximadamente, y extrajeron semanalmente muestras del contenido de la maquina para separar bolas activas. Examinaron estas y las pesaron, calculando asi su velocidad de desgaste. Este procedimiento se ha revelado como un metodo practico para el estudio de la resistencia al desgaste de las bolas en condiciones industriales. (author) [Russian] Skorost' iznosa drobil'nykh sharov, ispol'zuemykh v sharovykh drobilkakh, obychno trudno poddaetsya opredeleniyu v rabochikh usloviyakh; k tomu zhe malo chto izvestno otnositel'no faktorov, opredelyayushchikh srok sluzhby drobil'nykh sharov. Dlya polucheniya svedenij o sroke sluzhby drobil

  4. Gamma-Ray-Initiated Graft Copolymerization on the Surface of Nylon Fibers and in the Inner Layers of Cellulosic Fibers; Amorcage par rayons gamma de la formation de copolymeres greffes a la surface de fibres de nylon et dans les couches internes de fibres cellulosiques; Sopolimerizatsionnoe narashchivanie na poverkhnosti nejlonovogo volokna i vo vnutrennikh sloyakh tsellyuloznykh volokon pod dejstviem gamma-izluchenij; Copolimerizacion por injerto radioinducida en la superficie de fibras de nylon y en las capas internas de fibras celulosicas

    Energy Technology Data Exchange (ETDEWEB)

    Okamura, S; Iwasaki, T; Kobayashi, Y; Hayashi, K

    1960-07-15

    injerto cuando la irradiacion se efectua con dosis especificas del orden de los 10{sup 5} roentgens/hora . (author) [Russian] V rezul'tate oblucheniya nejlonovogo volokna v azotnoj srede sozdaetsya poperechnaya svyaz', togda kak pri obluchenii v vozdushnoj srede proiskhodit reaktsiya, vedushchaya k umen'sheniyu velichiny molekul. Proiskhodyashchie pod vliyaniem oblucheniya izmeneniya byli izucheny posredstvom izmereniya vyazkosti volokna, obluchennogo v rastvorakh sernoj kisloty. Prochnost' na rastyazhenie byla izuchena takzhe v vozdushnoj srede. Pri obluchenii v azotnoj srede pogruzhennogo v vodnyj rastvor akrilamida nejlonovogo volokna narashchivanie imeet mesto lish' na poverkhnosti. Esli zhe predvaritel'noe obluchenie proizvodilos' v vozdushnoj srede, to narashchivanie proiskhodit i vo vnutrennikh sloyakh volokna. Stepen' narashchivaniya tsellyuloznykh volokon pri pomoshchi stirola iz metanolovogo rastvora znachitel'no povyshaetsya, esli voloknu dat' nabukhnut' v 5-10 protsentnom rastvore formamida v metanole. Bylo izucheno vliyanie kontsentratsii formamida i stirola v rastvorakh metanola, prichem bylo ustanovleno, chto maksimal'noe narashchivanie proiskhodit v 5-protsentnom rastvore formamida i 70-protsentnoj kontsentratsii stirola. Pri moshchnosti dozy priblizitel'no v 10{sup 5} r/chas ustanovleno, chto skorost' narashchivaniya opredelyaetsya diffuziej. (author)

  5. Characteristics of the Beam-Plasma Discharge; Caracteristiques de la 'Decharge Faisceau-Plasma'; ХАРАКТЕРИСТИКИ РАЗРЯДА ПУЧКА В ПЛАЗМЕ; Caracteristicas de la Descarga Haz-Plasma

    Energy Technology Data Exchange (ETDEWEB)

    Smullin, L. D.; Getty, W. D. [Massachusetts Institute of Technology, Cambridge, MA (United States)

    1966-04-15

    annotacii my podvodim itog nedavnej raboty po izucheniju vzaimodejstvija jelektronnogo puchka s plazmoj, prodelannoj v Massachuzetskom tehnologicheskom institute. Kogda jelektronnyj puchok prohodit cherez plazmu, on vozbuzhdaet kolebanija na plazmennoj chastote. Jeti mikrovolnovye kolebanija podderzhivajut mikrovolnovyj razrjad, i my nazvali ves' process ''puchkovym razrjadom'. Ionizacija okruzhajushhego gaza osushhestvljaetsja jelektronami vysokoj jEhnergii iz plazmy, kotorye uskorjajutsja poljami kolebanij. Rezul'tatom javljaetsja obrazovanie gorjachej jelektronnoj plazmy vnutri ustanovki s magnitnymi probkami. Poskol'ku parametry razrjada puchka v plazme predstavljajutsja neblagoprijatnymi dlja neposredstvennogo ionnogo nagreva vzaimodejstviem puchka s plazmoj, my pristupili k jeksperimentam, v kotoryh dopolnitel'naja radiochastotnaja jenergija nakladyvaetsja s cel'ju vozbuzhdenija ciklotronnyh kolebanij ionov dlja ionnogo nagreva. Rassmotreniju podlezhat ustojchivost' plazmy; plotnost', srednjaja jenergija i maksimal'naja jenergija jelektronov plazmy; i predvaritel'nye rezul'taty po ionnomu nagrevu. Provodjatsja jeksperimenty s pul'sirujushhim jelektronnym puchkom v 10-15 kv i 10 - 15 A, kotoryj inzhektiruetsja vdol' osi magnitnyh probok v'oblast' drejfa, soderzhashhuju H{sub 2} np 10{sup -5}-10{sup -4} torr. Plotnost' jelektronov plazmy ob{sup e}mom v 1 litr obychno sostavljaet 10{sup 12}-10{sup 13} sm{sup -3} i plotnost' poperechnoj jEhnergii obychno sostavljaet 10{sup 15} jev/sm{sup 3}, chto sootvetstvuet temperature poperechnyh jelektronov v 10{sup 2}-10{sup 3} jev. Izmerenie jenergij rentgenovskih luchej ukazyvaet na sushhestvovanie' jelektronov s jenergiej 50-100 kjev. Spad plazmy posle vykljuchenija puchka proishodit v dva jetapa: otnositel'no bystraja poterja jelektronov nizkoj jEhnergii, {tau} Less-Than-Or-Equal-To 1000 mksek, i medlennyj spad jelektronov vysokoj jEhnergii s {tau} = 10-50 msek. Vtoroj jeksperiment provoditsja s temi zhe parametrami

  6. Comparison of Knolls Atomic Power Laboratory Clean Critical and Subcritical Experiments with Calculations; Etude Comparative des Calculs et des Experiences Critiques Non Empoisonnees et Souscritiques, Faits au Knolls Atomic Power Laboratory; Sravnenie chistykh kriticheskikh i podkriticheskikh opytov v nolle s raschetnymi dannymi; Comparacion de los Resultados Experimentales del Knolls Atomic Power Lamra Tory con los Valores Calculados Teoricamente en Conjuntos Criticos Limpios y Subcriticos

    Energy Technology Data Exchange (ETDEWEB)

    Bach, D. R.; Bistline, J. A.; Bunch, S. I.; Cerbone, R. J.; Feiner, F.; Skolnik, W.; Slovacek, R. E.; Weinstein, S. [Knolls Atomic Tower Laboratory, Schenectady, NY (United States)

    1964-02-15

    anteriores en todo el intervalo experimental. Los resultados de los calculos de las constantes de desintegracion por medio de la tecnica de extraccion de los venenos que cumplen la ley 1/v, utilizando claves normales de computo de difusion de pocos grupos con condiciones de frontera dependientes del grupo, concuerdan, con un margen de error que no pasa de algunas unidades por ciento de las constantes medidas, en todo el intervalo desde 100 a 45 000 s{sup -1}. Comparando las mediciones del espectro efectuadas con el selector lento con los valores calculados partiendo de los datos mas recientes de los nucleos para el hidrogeno ligado en el caso del agua y el polietileoo, se observa una concordancia satisfactoria excepto en los sistemas de agua con elevado coeficiente de absorcion. En este ultimo caso, los espectros medidos son aun mas blandos que los espectros de atomos libres obtenidos por calculo. (author) [Russian] V Nollskoj atomno-jenergeticheskoj laboratorii osushhestvlja- etsja shirokaja programma opytov i raschetov dlja ocenki adekvatnosti raschetnyh metodov i jadernyh dannyh dlja vodorodosoderzhashhih sistem. V progamme imejutsja tri obshhih aspekta: 1) chistye kriticheskie opyty s tverdym gomogennym toplivom s vysokim sootnosheniem mezhdu ob{sup e}mom metalla i ob{sup e}mom vodoroda; 2) chistye kriticheskie o'pyty s toplivom v vide plastin s ohvatom bol'shogo diapazona razmerov aktivnoj zony, otnoshenijamass metalla i vody, plotnosti topliva i temperatury; 3) izmerenija postojannoj raspada mgnovennyh nejtronov i spektroa stacionarnogo sostojanija v podkriticheskih sistemah s takoj zhe strukturoj. Toplivnye jelementy dlja opytov s tverdym gomogennym toplivom predstavljajut soboj spressovannye uplotnenija iz poroshkov ZrO{sub 2} i vysokoobogashhennogo UO{sub 2}, ravnomerno sme- shannyh s parafinom. Bloki otrazhatelja s takim zhe otnosheniem mass ZrO{sub 2} i parafina, kak i toplivnye bloki, pozvoljajut konstruirovat' otrazhaemye aktivnye zony s ravnomerno pa

  7. Half-Life Studies of Radiocaesium in Humans; Etudes sur la Periode de Radiocesium chez l'Homme; 0418 0421 0421 041b 0415 0414 ; Estudio sobre el Periodo Biologico del Radiocesio en el Hombre

    Energy Technology Data Exchange (ETDEWEB)

    Naversten, Y.; Liden, K. [Radiation Physics Department, University of Lund (Sweden)

    1964-11-15

    estos estudios, sobre todo en lo que respecta a la velocidad de eliminacion del cesio, es decir, al periodo biologico y a su variacion segun el sexo y la edad. Por lo general, los periodos biologicos determinados experimentalmente oscilan entre 30 y 90 d. (author) [Russian] Izuchalas zaderzhka cezija-137 u ljudej pri razlichnyh obstojatel'stvah. Dvum vzroslym muzhchinam vvodili vnutrivenno malye kolichestva cezija-137. Pacienty nahodilis' pod nabljudeniem 300 dnej, v techenie kotoryh proizvodilis' chastye izmerenija radio aktivnosti vsego organizma.i sbor vydelenij v nachal'nom periode. Stepen' zaderzhki izotopa snizhalas' kak summa dvuh jeksponencial'nyh velichin. Naibolee medlenno izmenjajushhajasja velichina snizhalas' s periodom poluvyvedenija okolo 75 dnej. Olin iz pacientov poluchal cezij-137 vnutr' 2 goda spustja,prichem nabljudalsja tot zhe tip vydelenija, kak i posle vnutrivennogo vvedenija. Skorost' vydelenija cezija-137 izuchalas' takzhe drugim sposobom u bol'shoj gruppy muzhchin, zhenshhin i detej putem sravnenija dannyh issledovanija diety. Pri obsledovanii gruppy iz 10 dobrovol'cev, izmenivshih svoju dietu, okazalos' vozmozhnym rasschitat' srednjuju skorost' vydelenija na osnovanii izmerenija radioaktivnosti vsego organizma s intervalom v 6 nedel'. Vydelenija opredeljali takzhe u 2-h chelovek posle priema vnutr' cezija-137. Predstavleny podrobnye dannye jetih issledovanij, v osobennosti v otnoshenii skorosti vydelenija cezija, t.e. perioda ego poluvyvedenija i ego variacij v zavisimosti ot pola i vozrasta. V srednem byli polucheny sroki poluvyvedenija ot 30 do 90 dnej. (author)

  8. Self-diffusion in volume and at the grain-boundaries of gamma-iron of high purity (99.99%); Autodiffusion en volume et aux joints de grains du fer gamma de haute purete (99,99 %); Ob'emnaya samodiffuziya i samodiffuziya na poverkhnosti granul zheleza u vysokoj chistoty (99,99%); Autodifusion en volumen y en los limites intergranulares del hierro gamma de elevada pureza (99,99 por ciento)

    Energy Technology Data Exchange (ETDEWEB)

    Lacombe, P; Guiraldenq, P; Leymonie, C [Centre de Recherches Metallurgiques, Ecole Nationale Superieure des Mines, Paris (France)

    1962-01-15

    1260 Degree-Sign y 918 Degree-Sign C, y de las constantes de autodifusion en las uniones intergranulares entre 1020 Degree-Sign y 918 Degree-Sign C. (author) [Russian] Vvidu trudnostej, s kotorymi vstretilis' pri tochnom izmerenii koehffitsientov samodiffuzii kak vnutri, tak i mezhdu samimi granulami v nekotorykh intervalakh temperatury, kogda sosushchestvuyut oba yavleniya, my byli vynuzhdeny pribegnut' k obychnomu metodu deleniya na chasti. V samom dele my uzhe ustanovili, chto dlya vyazkogo polutverdogo tela posle diffuzii kontsentratsiya radioaktivnykh atomov c (x{sub n}) na rasstoyanii x{sub n} ot pervonachal'nogo radioaktivnogo osadka yavlyaetsya prostoj funktsiej obshchej aktivnosti, kotoraya ostaetsya v obraztse posle abrazii na glubinu x{sub n}. EHtot vyvod yavlyaetsya rezul'tatom obobshcheniya formuly Gruzina, kotoraya do nastoyashchego vremeni primenyalas' tol'ko v ob{sup e}mnoj diffuzii. Takim obrazom my pokazali, chto mozhno putem izmereniya obshchej aktivnosti, ostayushchejsya v zavisimosti ot glubiny proniknoveniya razlichat' dolyu aktivnosti, kotoraya proiskhodit iz-za ob{sup e}mnoj samodiffuzii ot aktivnosti, proiskhodyashchej iz-za mezhgranulovoj samodiffuzii. Odnako tsennost' metoda zaklyuchaetsya v tom, chtoby prosledit' dal'she na tom zhe samom obraztse perekhod ob{sup e}mnoj samodiffuzii v mezhgranulovuyu samodiffuziyu. My primenili ehtot novyj metod dlya izmereniya konstant ob{sup e}mnoj samodiffuzii v zheleze u pri temperature 1260 Degree-Sign i 980 Degree-Sign C, a takzhe samodiffuzii na poverkhnosti granul pri temperature 1020 Degree-Sign i 918 Degree-Sign C. (author)

  9. Thermal Shock Tests on UO{sub 2} Small Spheres; Essais de choc thermique sur des elements spheriques de UO{sub 2}; Ispytaniya nebol'shikh sharikov iz UO{sub 2} teplovykh udarom; Ensayo de pequenas esferas de UO{sub 2} por choque.termico

    Energy Technology Data Exchange (ETDEWEB)

    Perona, G.; Brutto, E.; Galbusera, U.; Palladino, G.; Sesini, R. [Centro Informazioni Studi Esperienze, Milan (Italy)

    1963-11-15

    exponen los resultados obtenidos. La aplicacion de este metodo presenta, al parecer, considerable interes, sobre todo en lo que concierne a las investigaciones encaminadas a mejorar las caracteristicas de las esferas de UO{sub 2} por medio de aditivos. En e fecto, permite verificar el efecto global con una sola medicion. (author) [Russian] Ispol'zuya malye pariki iz UO{sub 2} v kachestve yadernogo topliva v reaktore, gde oni nakhodyatsya v soprikosnovenii s teplonositelem, neobkhodimo znat' maksimal'nuyu pri rabochem rezhime reaktora velichinu termicheskikh napryazhenij, kotorye mogut vyderzhivat' bez povrezhdeniya ehti shariki. Esli izvestny fizicheskie svojstva materiala, to mozhno rasschitat' ehti napryazheniya pri rabochem rezhime. Odnako vvidu mnogochislennosti podlezhashchikh uchetu faktorov i neizbezhnoj doli neopredelennosti kazhdogo iz nikh predstavlyaetsya predpochtitel'nym provesti neposredstvennye ispytaniya ehtikh sharikov, podvergnuv ikh tem zhe napryazheniyam, kakie oni ispytyvayut v reaktore. V nastoyashchej rabote byl izuchen metod teplovogo udara v primenenii k malym sharikam i ukazyvayutsya usloviya, pri kotorykh ehtot metod pozvolyaet proizvesti napryazheniya, neposredstvenno sravnimye s temi, kotorye sushchestvuyut v reaktore. V sluchae malykh sharikov zatrudnenie zaklyuchaetsya v osushchestvlenii okhlazhdeniya, pozvolyayushchego dostigat' ochen' bol'shikh znachenij koehffitsienta poverkhnostnoj teploperedachi. Opisyvayutsya ehksperimental'nye metody i soobshchayutsya poluchennye rezul'taty. Primenenie ehtogo' metoda, po-vidimomu., predstavlyaet bol'shoj interes, v osobennosti v oblasti tekhnologicheskikh izyskanij s tsel'yu uluchsheniya svojstv malykh sharikov iz UO{sub 2} putem vklyucheniya dobavochnykh komponentov. Fakticheski,ehtot metod daet vozmozhnost' pri pomoshchi odnogo tol'ko izmereniya kontrolirovat' izuchaemoe vozdejstvie. (author)

  10. Non-Destructive Examination of the Heat-Affected Zone of Welded Zr-Nb Alloy; Controle Non Destructif de la Zone d'Un Alliage Zr-Nb Affectee par la Chaleur Lors du Soudage; Nedestruktivnoe ispytanie zony svarnogo shva iz tsirkonij-niobij splava, kotoryj podverzhen teplovomu vliyaniyu; Examen No Destructivo de la Zona de Soldadura Afectada por el Calor en las Aleaciones de Circonio y Niobio

    Energy Technology Data Exchange (ETDEWEB)

    Hanstock, R. F.; Walker, D. C.B. [U.K.A.E.A. Reactor Materials Laboratory, Culcheth (United Kingdom)

    1965-10-15

    sencilla modificacion, para examinar las soldaduras en las aleaciones de circonio y niobio. Se da un ejemplo de las variaciones en la respuesta de la sonda en las distintas partes de una soldadura afectadas por el calor, y se las compara con los resultados del estudio de la corrosion efectuado en autoclave. (author) [Russian] Ispol'zovanie splava iz cir- konija i 2,5% niobija dlja obolochki vysokogo davlenija v reaktorah s vodnym zamedlitelem imeet rjad preimushhestv, svjazannyh s prochnost'ju je t ogo splava blagodarja termoobrabotke. Termoobrabotka takzhe chuvstvitel'no vlijaet na korrozionnuju stojkost' splava v uslovijah raboty reaktora, i v zonah svarki plavleniem, kotorye podverzheny teplovomu vlijaniju, mogut pojavit'sja zony nizkoj korrozionnoj stojkosti. Zony, podverzhennye korrozii, mozhno usta- novit' putem obrabotki v avtoklave. Odnako je tot metod javljaetsja neudobnym v teh slucha- jah, kogda putem svarki sobirajutsja krupnogabaritnye kontury vysokogo davlenija. Prishli k vyvodu, chto zony teplovogo vozdejstvija, chuvstvitel'nye k korrozii, mozhno obnaruzhit' putem izmerenija termojelektricheskogo potenciala mezhdu nagretym metallicheskim tochech- nym zondom, kontaktirujushhimsja s opredelennymi oblastjami svarnogo shva, i primykajushhim k nemu metallom. Termojelektricheskij zond izgotavlivaetsja tak zhe, kak zond, kotoryj soz - dan Britanskoj associaciej po issledovanijam cvetnyh metallov dlja izmerenija tolshhiny pokrytija metallicheskih substratov. Imejushhijsja v prodazhe pribor, kotoryj vkljuchaet takoj zond s neznachitel'nymi vidoizmenenijami, mozhno ispol'zovat' dlja ispytanija svarnyh soedinenij iz cirkonij-niobij splavov. Privoditsja primer izmenenija zondovoj chuvstvitel'- nosti po zonam svarnogo shva, podverzhennym teplovomu vozdejstviju, i jet ot primer srav- nivaetsja s provedennym v avtoklave ispytaniem na korroziju. (author)

  11. Difficulties and Successes in the Mass Rearing of Insects in the Laboratory, and the Possibility of Autocidal Control of some Harmful Species; Trudnosti i uspekhi massovogo razvedeniya nasekomykh v laboratorii i vozmozhnosti samoistrebleniya nekotorykh vrednykh vidov

    Energy Technology Data Exchange (ETDEWEB)

    Shumakov, E. M. [Rastenij, Vsesojuznyj Nauchno-Issledovatel' skij Institut Zashhity Leningrad, SSSR (Russian Federation)

    1968-06-15

    ' vitaminov, svobodnyh aminokislot i sterinov. Vazhnejshee znachenie imeet pravil'noe kolichestvennoe sootnoshenie v pishhevoj srede kak ukazannyh veshhestv, tak i osnovnyh komponentov korma - belkov, zhirov i uglevodov. Trudoemkost' processov razmnozhenija nasekomyh opredeljaetsja sposobami sterilizacii posudy i osadkov, a takzhe metodami predohranenija pishhevyh sred ot zagnivanija. Primerom preodolenija jetih trudnostej javljaetsja sozdanie suhoj, poroshkoobraznoj sredy dlja pereletnoj saranchi, na kotoroj v SSSR jetot vid uspeshno vospityvaetsja. Dlja rjada vrednyh vidov Lepidoptera {sup p}okazana vozmozhnost' vyrashhivanija osobej v zakrytoj, germetizirovannoj posude. Pri jetom daetsja zapas pishhevoj sredy, obespechivajushhij razvitie osobej s momenta podsadki na srodu jaic ili gusenic do vyhoda imago novogo pokolenija. Takoj priem ves'ma uproshhaet ves' tehnologicheskij process poluchenija massovoj produkcii. Mnogie vidy nasekomyh mozhno vospityvat' na zerne i semenah rastenij , menee podverzhennyh zagnivaniju npvi dlitel'nom hrapenii. Vazhnejshim voprosom massovogo razvedenija javljaetsja razrabotka putej preodolenija diapauzy u laboratornoj populjacii, chto obespechivaet nepreryvnost' razvedenija. Ustranenie diapauzy dostigaetsja kak reaktivaciej temperaturnymi vozdejstvijami, tak i sozdaniem fotoperioda, predotvrashhajushhego vozniknovenie diapauzy . Vozmozhen eshhe odin put': podbor i skreshhivanie geneticheski razlichnyh ras dannogo vida, imejushhih diapauzu i lishennyh ee. Na primere rjada vidov Orthoptcra, imejushhih dostatochno bol'shie arealy, pokazana vozmozhnost' samoistreblenija vrednyh vidov putem podmeshivanija k prirodnoj populjacii, normal'no imejushhej diapauzu - osobej bezdiapauznoj populjacii iz drugih chastej areala togo zhe vida. Takie vozmozhnosti vyjavleny dlja sverchka Teleogryllus com- moclus Walk v Avstralii, i dlja podvidov Locusta migratoria L. na territorii Starogo Sveta. Razrabotka takogo puti samoistreblenija nasekomyh zasluzhivaet bol

  12. The Biological Effect of Fast Neutrons and High-Energy Protons; Effets Biologiques des Neutrons Rapides et des Protons de Haute Energie; Biologicheskoe dejstvie bystrykh nejtronov i protonov vysokikh ehnergii; Efectos Biologicos de los Neutrones Rapidos y de los Protones de Elevada Energia

    Energy Technology Data Exchange (ETDEWEB)

    Moskalev, Ju. I.; Petrovich, I. K.; Strel' cova, V. N.

    1964-03-15

    despues de la irradiacion con una dosis de 42,5 rad. Con la misma dosis tambien se manifiestan leucosis y tumores de la tiroides. En la irradiacion protonica, la dosis tumorigena minima es del orden de 250 rad para lee tejidos hematopoyeticos y la tiroides, de 300 rad para los testiculos, y de unos 100 rad para la prostata, el pancreas y el tejido hipodermico. Despues de la irradiacion con neutrones rapidos, la frecuencia de la aparicion de tumores en los testiculos, el intestino grueso, los rinones y el higado, presenta un aumento para dosis entre 42,5 y 85 rad, y en la piel y el tejido hipodermico ocurre lo mismo para dosis de 85 rad. En el caso de la irradiacion con neutrones rapidos, los tumores aparecen con dosis de 3 a 5 veces inferiores a las dosis protonicas. (author) [Russian] Predstavljajutsja rezul'taty sravnitel'nyh jeksperimentov po izucheniju dejstvija bystryh nejtronov i protonov vysokih jenergij (500 Mjev) na prodolzhitel'nost' zhizni, perifericheskuju krov', cha sto tu i skorost' pojavlenija opuholej u krys v zavisimosti o t dozy vozdejstvija i sroka nabljudenija. Opyt s nejtronami postavlen na 573, s protonami na 490 belyh krysah. Bystrymi nejtronami zhivotnyh obluchali v dozah ot 8,5 do 510 rad, protonami ot 28 do 1008 rad. Dlja bystryh nejtronov i protonov ustanovleny velichiny ostro, podostro i hronicheski jeffektivnyh d o z . LD{sub 50/30} dlja nejtronov ravna 408, dlja protonov 600 rad, a LD{sub 50/120} so otvetstvenno 380 i 600 rad. Proanalizirovany zakonomernosti vymiranija krys v rannie i pozdnie sroki jeksperimenta. Pokazano, chto srednjaja prodolzhitel'nost' zhizni krys, obluchennyh bystrymi nejtronami, ne zavisit ot pola. Forma krivoj doza-jeffekt dlja otdel'nyh pokazatelej perifericheskoj krovi sushhestvenno zavisit ne tol'ko ot radiochuvstvitel'nosti sootvetstvujushhih kletok krovi, no i ot sroka nabljudenija. Ona mozhet sushhestvenno izmenjat'sja vo vremeni dlja odnogo i t o go zhe pokazatelja. V otdalennye sroki posle obluchenija kak

  13. Status of Research and Developmental Studies on Radiation Pasteurization of Fish and Shellfish in the United States; Etat des Etudes et des Realisations en Matiere de Radiopasteurisation des Poissons, Crustaces et Mollusques aux Etats-Unis; Sostoyanie nauchno-issledovatel'skikh rabot po radiatsionnoj pasterizatsii ryby i krabov v soedinennykh shtatakh; Estado de las Investigaciones y Estudios Experimentales Sobre la Radiopasteurizacion de Pescados y Mariscos en los Estados Unidos

    Energy Technology Data Exchange (ETDEWEB)

    Slavin, J. W.; Ronsivalli, L. J.; Connors, T. J. [United States Bureau of Commercial Fisheries Technological Laboratory, Gloucester, MA (United States)

    1966-11-15

    kachestvo produkta i sroki hranenija; upakovka imeet sushhestvennoe znachenie. Sinergeticheskie sistemy s ispol'zovaniem baktericidnyh solej ili nagreva v svjazi s izlucheniem jeffektivno unichtozhajut bakterii i svidetel'stvujut o vozmozhnosti sokrashhenija radiacionnyh urovnej i uvelichenija srokov hranenija produktov po sravneniju so srokami, kogda primenjaetsja lish' izluchenie. Obluchenie na ochen' nizkih urovnjah znachitel'no izmenjaet mikrobnuju floru rybnogo file, no interesno, chto jeto izmenenie bol'she izmenenija, kotoroe imeet mesto pri hranenii produktov v anajerobnoj okruzhajushhej srede. Obsuzhdaja mikrobiologicheskie izmenenija v obluchennoj i neobluchennoj rybe, avtory otmechajut, chto obrabotannye rybnye file javljajutsja takimi zhe bezopasnymi i s{sup e}dobnymi, kak i neobrabotannaja ryba. V doklade podrobno obsuzhdajutsja raboty po aspektam bezopasnosti obluchennyh rybnyh file. Provedenie issledovatel'skih rabot aktivizirovalos' posle sooruzhenija i puska v jekspluataciju ustanovki po obrabotke ryby s pomoshh'ju kobal'ta-60 moshhnost'ju v 250 000 kjuri v Glostere, Massachusets. Ispytanija po upakovke i perevozke obluchennyh produktov v iskusstvennyh kommercheskih uslovijah pokazyvajut, chto s pasterizovannoj ryboj mozhno obra shhat'sja tak zhe, kak i so svezhej ryboj, prichem srok hranenija pasterizovannoj ryby v dva raza vyshe. V sotrudnichestve s chastnymi i gosudarstvennymi organizacijami obluchennye s{sup e}dobnye produkty morja perevozilis' po territorii Soedinennyh Shtatov v kommercheskih kontejnerah i provodilas' ocenka na kachestvo. Rezul'taty - ves'ma obnadezhivajushhie i svidetel'stvujut o tom', chto dannyj process budet imet' chrezvychajno cennoe znachenie dlja promyshlennosti. Obluchenie ryby v more govorit o perspektive ispol'zovanija jetogo metoda v kachestve sredstva uvelichenija sroka hranenija vylovlennoj svezhej ryby. Predvaritel'nye rezul' taty ukazyvajut kovodnoj ryby v more na urovne menee 100 000 rad i posledujushhee povtornoe

  14. Theoretical and Experimental Aspects of Quenching Variables from Biomedical Samples in Liquid Scintillator Systems; Aspects Theoriques et Experimentaux des Parametres d'Extinction Etudies sur des Echantillons Biomedicaux dans des Systemes a Scintillateur Liquide; Teoreticheskie i ehksperimental'nye aspekty peremennykh gasheniya iz biomeditsinskikh prob v zhidkikh stsintillyatsionnykh sistemakh; Estudio Teorico y Experimental de las Variables de Extincion en el Recuento de Sustancias Biological por Centelleo Liquido

    Energy Technology Data Exchange (ETDEWEB)

    Ross, H. H. [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1965-10-15

    sostoit iz nebol'shoj ampuly, soderzhashhej negashenuju scintilljacionnuju zhidkost' s dobavkoj zhelatel'nogo radioizotopa. Fotony, izluchaemye jetim standartom, obladajut takoj zhe intensivnost'ju fluorescencii i imejut takoe zhe spektral'noe raspredelenie, kak fotony, poluchaemye v samoj probe. Posle izgotovlenija izolirovannyj vnutrennij standart pogruzhajut v chistyj zhidkij scintilljacionnyj rastvor i podvergajut schetu. Vtoroj schet proizvodjat so standartom, pogruzhennym v probu, kotoraja projavljaet obescvechivanie. Otnoshenie odnogo scheta k drugomu javljaetsja meroj gashenija okraski v probe i ne zavisit ot veshhestv, vyzyvajushhih gashenie fluorescencii. Blagodarja prostote i praktichnosti jetot metod goditsja dlja povsednevnyh issledovanij. Oba metoda vnesenija popravok ispol'zovali dlja opredelenija gasjashhego vozdejstvija v sistemah razlichnyh prob. Shiroko izuchali osobo izgotovlennye rastvory krasok i proby mochi, krovi i tkani pecheni. Rezul'taty ukazyvajut na velikolepnoe sovpadenie pokazanij oboih metodov. Gasjashhee vozdejstvie bol'shej chasti prob mochi, krovi i pecheni mozhno opredelit' s tochnost'ju do {+-}3%. (author)

  15. Analysis of the Volatile Constituents of Irradiated Apple Juice; Analyse des Constituants Volatils des Jus de Pommes Irradies; Mezhdunarodnyj proekt po oblucheniyu fruktov i fruktovykh sokov; Analisis de los Componentes Volatiles de los Zumos de Manzana Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Dubois, P.; Zenz, H.; Stehlik, G.; Kaindl, K. [Agence Europeenne pour l' Energie Nucleaire, Seibersdorf (Austria)

    1966-11-15

    sootvetstvujushhij emu na hromatogrammah pik polnost'ju pokryvaetsja pikom jetanola, kogda rech' idet o nekoj- centrirovannyh sokah. Byli obnaruzheny k tomu zhe obrazovanija furana i dvuh soedinenij, kotorye pojavljajutsja tol'ko v vide sledov i kotorye ne byli opredeleny do nastojashhego vremeni. Poluchennye rezul'taty byli analogichny tem, chto i pri pasterizacii putem nagrevanija. (author)

  16. Determination of D{sub 2}O-2% Enriched Uranium Lattice Parameters by Means of a Critical System; Determination des Parametres d'un Reseau Uranium Enrichi a 2%-Eau Lourde au Moyen d'un Ensemble Critique; Opredelenie s pomoshch'yu kriticheskoj sistemy parametrov reshetki s 2%-nym obog ashcheniem Urana i s zamedlitelem D{sub 2}O; Determinacion, Mediante un Conjunto Critico, de los Parametros de un Reticulado de D{sub 2}O y Uranio Enriquecido al 2%

    Energy Technology Data Exchange (ETDEWEB)

    Raisic, N.; Takac, S.; Markovic, H.; Bosevski, T. [Boris Kidric Institute of Nuclear Sciences, Belgrade, Yugoslavia (Serbia)

    1964-02-15

    las tecnicas utilizadas en las mediciones. Los datos experimentales sirvieron a continuacion para deducir los parametros del reticulado, dennidos por la formula de cuatro factores y el estudio matematico del cuerpo del reactor con arreglo a la teoria de difusion de dos grupos. Los resultados obtenidos se comparan con los valores corrientemente asignados a los mismos parametros para configuraciones de reticulados medidos. Se presentan las desviaciones halladas en el valor de n y en la integral de resonancia para el {sup 238}U. En conclusion, se analiza la utilidad y precision de los datos obtenidos con los experimentos criticos para la construccion y explotacion de un reactor de investigacion de D{sub 2}O y uranio enriquecido. (author) [Russian] Daetsja opisanie serii opytov, vypolnennyh s cel'ju opredelenija osnovnyh parametrov reshetki s 2%-nym obogashheniem urana i s zamedlitelem v vide D{sub 2}O. Toplivnye jelementy predstavljali soboj polye cilindry, pokrytye aljuminiem i smochennye kak snaruzhi, tak i iznutri vodoj. Opyty provodilis' na kriticheskoj sborke RB Instituta jadernyh nauk im. Boris Kidric v Belgrade. Udobooptekaemaja geometricheskaja forma jetoj sistemy daet vozmozhnost' sravnitel'no prosto teoreticheski ob'jasnit' rezul'taty opytov i provesti neposredstvennoe gotovoe sravnenie s raschetami dvuhgruppovoj teorii diffuzii. Izmerenija, vypolnennye dlja desjati razlichnyh konfiguracij reshetki, vkljuchali opredelenie laplasiana, kojefficienta reaktivnosti urovnja vody i blok-jeffekta dlja potoka teplovyh i nadteplovyh nejtronov vnutri kamery reaktora. Opisyvaetsja metodika ctih izmerenij. Dannye opytov ispol'zujutsja dlja vyvedenija parametrov reshetki, opredeljaemyh po formule chetyreh somnozhitelej i pri primenenii k aktivnoj zone reaktora dvuhgruppovoj teorii diffuzii. Rezul'taty sravnivajutsja so standartnymi raschetami teh zhe parametrov dlja izmerjaemyh konfiguracij reshetki. Otmechajutsja otklonenija v velichine p i rezonansnogo integrala U-238. V

  17. A Contribution to the Study of the Oxidation of Uranium Monocarbide in Carbonic Anhydride at High Temperatures; Contribution a l'etude de l'oxydation du monocarbure d'uranium dans l'anhydride carbonique aux temperatures elevees; Vklad v izuchenie voprosa okisleniya monokarbida urana v ugol'nom angidride pri povyshennykh temperaturakh; Contribucion al estudio de la oxidacion del monocarburo de uranio en anhidrido carbonico a temperaturas elevadas

    Energy Technology Data Exchange (ETDEWEB)

    Desrues, R; Paidassi, J.; Darras, R. [Centre d' Etudes Nucleaires, Saclay (France)

    1963-11-15

    monocarburo, sea que provengan del uranio o bien del dicarburo, disminuye la resistencia de este compuesto a la oxidacion; ello puede atribuirse sobre todo al hecho de que aquellas sufren una oxidacion muy seria, especialmente a raiz de las tensiones mecanicas que causa. 3. En todos los casos, el proceso de oxidacion puede caracterizarse por una energia de activacion igual a 29 000 cal/M, valor muy proximo al correspondiente a la oxidacion del uranio metalico en el mismo gas y a la difusion del oxigeno en el oxido de uranio (UO{sub 2}) que se forma. (author) [Russian] Obraztsy monokarbida urana, poluchennogo dvumya razlichnymi metodami, i obraztsy ker- meta sostava 96,7 ves% U-3,3 ves% S podvergalis' dejstviyu ugol'nogo angidrida, tshchatel'no ochishchennogo ot kisloroda i vodyanykh parov, v intervalakh 350 - 600 deg. C, i nablyudalos' ikh okislenie odnovremenno mikrograficheskim i gravimetricheskim sposobami pri pomoshchi termovesov Ehjro. Bylo otmecheno sleduyushchee: 1) Krivye vyrazhayut uvelichenie vesa kak funktsiyu vremeni i vnachale nosyat yarko vyrazhennyj linejnyj kharakter, zatem bystro vozrastayut, chto ob{sup y}asnyaetsya, v osnovnom,progressivnym razlozheniem obraztsov. Vprochem, poluchennye dannye uvelicheniya vesa yavlyayutsya bolee nizkimi chem te, kotorye byli opublikovany do nastoyashchego vremeni, chto sleduet, ochevidno, pripisat' bolee vysokoj chistote upotreblennogo ugol'nogo angitrida i ochen' neznachitel'noj poristosti ispol'zovannogo monokarbida urana. 2) Nalichie vklyuchenij v monokarbid, kotorye sootvetstvuyut uranu ili dikarbidu, umen'shaet stojkost' ehtogo materiala k okisleniyu, chto sleduet pripisat', glavnym obrazom,katastroficheskomu okisleniyu samikh vklyuchenij iz-za mekhanicheskikh svyazej. 3) Vo vsekh sluchayakh protsess okisleniya mozhet byt' okharakterizovan ehnergiej aktivatsii, ravnoj 29 000 kal/mol', velichinoj, ochen' blizkoj k toj, kotoraya sootvetstvuet okisleniyu metallicheskogo urana v tom zhe gaze i diffuzii kisloroda v okisi

  18. Tritiated Thymidine as Tracer in DNA Metabolism and Cell Dynamics of Experimental Myeloid Leukaemia; Emploi de la Thymidine Tritiee comme Indicateur pour l'Etude du Metabolisme de l'ADN et de la Dynamique des Cellules dans la Leucemie Myeloide Experimentale; 0422 0440 0438 0442 0414 ; Empleo de la Timidina Tritiada como Indicador para Estudiar el Metabolismo del Acido Desoxirribonucleico y la Dinamica Celular en la Leucemia Mieloide Experimental

    Energy Technology Data Exchange (ETDEWEB)

    Zajicek, G.; Rosin, A.; Gross, J. [Department of Experimental Medicine and Cancer Research, Hebrew University, Hadassah Medical School, Jerusalem (Israel)

    1962-02-15

    proizvedena ocen- ka skorosti pojavlenija mechenyh kletok v periferijnoj krovi, a takzhe v ascit- noj opuholi zhivotnogo. Pri drugih jeksperimentah delalas' ocenka skorosti raz- bavlenija jetogo metjashhego veshhestva v jadrah, chto pozvolilo takim obrazom opredelit' vremja udvoenija kletok v mielocitnoj populjacii. Izuchalas' dinamika lejkemichnyh kletok posle perelivanija krovi putem vvedenija mechenogo mielocita v shejnuju venu obychnyh i stradajushhih lejkemiej krys. Byla izmerena skorost' ih ischeznovenija iz krovi. Byli izucheny razlichnye organy dlja mechenyh kletok, prichem najdeno, chto vskore posle vvedenija jetih kletok oni sosredotachivalis' glavnym obrazom v legkih, a pozdnee v selezenke i v ves'ma neznachitel'nom kolichestve v pecheni. Spustja 24 chasa ni v odnom organe ne bylo obnaruzheno nikakih mechenyh kletok. Takim obrazom byli polucheny svedenija o sud'be lejkemichnogo mielocita v razlichnyh organah normal'nyh i zarazhennyh lejkemiej zhivotnyh. Pri provedenii laboratornyh jeksperimentov TN{sup 3} dobavljalsja v suspenziju kletok v koncentracii 1 mkkmri/ml. V processe mechenija v la'oratornyh chslo- vijah bylo otmecheno, chto chislo mechenyh kletok bylo v 40 raz bol'she chisla mitozov. (To zhe samoe bylo obnaruzheno pri vvedenii TN{sup 3} v la'oratornyh uslovijah. 1 Byla ustanovlena skorost' vvedenija TN{sup 3}. Byli ispytany koncentracii ot 0,0036 mkmolbh 10{sup -3} do 1,8 mkmolbh Ju{sup -3} . Bylo ustanovleno, chto procent kletok, usvaivajushhih jeto metjashhee veshhestvo, javljaetsja postojannym dlja razlichnyh kon- centracij timidina. Chislo zeren na jadro uvelichivalos' po mere vozrastanija vvodimoj koncentracii TN{sup 3}. Posle okonchanija skrytogo perioda, prodolzhav- shegosja 120 minut, ne bylo obnaruzheno nikakih mechenyh mitozov. Dalee metod vvedenija metjashhego veshhestva.byl odinakovym kak pri dobavlenii ego v nachale skrytogo perioda, tak i posle 160 minut. Dobavlenie TN{sup 3} k toj zhe suspenzii' pri razlichnyh intervalah ne izmenilo procena

  19. Gamma Monitoring of Land Surfaces; Controle Gamma des Surfaces Terrestres; 0413 0410 041c 041c 0410 - 0414 ; Control de la Actividad Gamma en la Superficie del Terreno

    Energy Technology Data Exchange (ETDEWEB)

    Ophel, I. L.; Jones, A. R. [Environmental Research and Radiation Dosimetry Branch, Division of Biology and Health Physics, Atomic Energy of Canada Limited, Chalk River, ON (Canada)

    1960-07-01

    ha acoplado un dispositivo para transportar una fuente patron de radio. El aparato es insensible a los rayos cosmicos y cuando el vehiculo se desplaza a 16 km/h las lecturas efectuadas representan el 80 por ciento de las obtenidas cuando el contador permanece inmovil. La medicion de la radiactividad en las carreteras que atraviesan la zona del reactor, acompanada de lecturas complementarias en puntos fijos de control distantes 100 metros de la carretera y 3.2 km entre si, ha demostrado que la radiacion ambiente en las carreteras es muy uniforme, alcanzando un promedio de 6 {mu}r/h. Los valores hallados en los puntos de control varian de 4,5 a 7,0 {mu}r/h. (author) [Russian] Bystroe provedenie dozimetricheskogo kontrolja zemnoj poverhnosti polezno dlja opredelenija razmerov ploshhadi, popavshej pod vozdejstvie radioaktivnogo zagrjaznenija vozduha ili dlja obnaruzhenija dlitel'nogo zarazhenija okruzhajushhej sredy. Dlja podgotovitel'nogo issledovanija mesta, kotoroe okruzhaet ploshhadku jenergeticheskogo rajona NPD okolo Chok-River, ispol'zovalsja massivnyj kontrol'nyj pribor, sposobnyj proizvodit' nepreryvnuju registraciju pri ustanovke ego na avtomobile. On sostoit iz antracenovogo kristallicheskogo schetchika gamma-luchej so shemoj fotoumnozhitelja usilenija impul'sov skorosti scheta - usilitel' postojannogo toka - 1 tA serija impul'sov samopisca.' Jeto oborudovanie vesit 28 kilogrammov i ustanavlivaetsja pri pomoshhi dvuh boltov na bufer villisa. Ego mozhno snjat' i ustanovit' na trenozhnike na takuju zhe vysotu nad zemlej. Vnutri avtomobilja ustanavlivaetsja rtutnaja batareja. Shemy rabotajut na poluprovodnikah. Dlja standartnogo istochnika radiokalibrovki ustanavlivajutsja zazhimnye prisposoblenija. Pribor ne chuvstvitelen k kosmicheskomu izlucheniju i pri skorosti dvizhenija mashiny 16 km/chas otschety dostigajut 80% teh, kotorye poluchajutsja pri nepodvizhnoj ustanovke schetchika. Obsledovanie dorogi na territorii NPD pri schete, snjatom takzhe na ustanovlennyh

  20. The Combined Use of Autoradiographic and Electron Microscopic Techniques for Studies on Ultra-Thin Sections of Tritium-Labelled Cells of the Intestinal Epithelium; Emploi Combine de l'Autoradiographie et du Microscope Electronique pour L'Etude de Coupes Ultra-Fines de Cellules Tritiees de l'Epithelium Intestinal; 0421 043e 0432 043c 0435 0414 ; Empleo Combinado de Tecnicas de Autorradiografia y de MicroscopiA Electronica para Estudiar Cortes Ultrafinos de Celulas Tritiadas del Epitelio Intestinal

    Energy Technology Data Exchange (ETDEWEB)

    Hampton, J. C. [Division of Experimental Biology, Baylor University College of Medicine, TX (United States); Quastler, H. [Brookhaven National Laboratory, Upton, Long Island, NY (United States)

    1962-02-15

    tolstoj dlja poluchenija radioavtografii, no vse zhe dostatochno tonkoj dlja povtornogo izuchenija obrazca pod jelektronnym mikroskopom i dlja poluchenija novogo jelektronnogo mikrograficheskogo izo- brazhenija uzhe zasnjatogo ran'she radioavtografa kletok. Radioavtograficheskaja jemul'sija nakladyvalas' sledujushhim obrazom: pri pogruzhenii nebol'shoj provolochnoj petel'ki v zhidkuju jemul'siju na petle obrazovalas' tonkaja plenka, kotoraja perenosilas' jetoj petlej na prigotovlennyj obrazec, zakrepljavshijsja na okonechnosti nebol'shogo kolyshka iz plastmassy. Nadlezhashhij kontrol' mozhet proizvodit'sja putem snjatija sreza v polmikrona s kazhdogo sve- rhtonkogo sreza i nalozhenija ego na stekljannuju plastinku dlja semki obych- nym radioavtograficheskim metodom. Vvidu bol'shoj hrupkosti sverhtonkih srezov udaetsja poluchit' lish' nebol'shoe chislo udachnyh radioavtografov. Nesmotrja na jetot nedostatok, sleduet ozhidat', chto po mere uluchshenija tehniki i metoda jetot sposob oblegchit ponimanie vazhnyh zhiznennyh kletochnyh processov. (author)

  1. Production of Xenon Compounds by the Beta Decay of Iodine in Iodine Compounds; Production de Composes du Xenon par Desintegration Beta de l'Iode dans les Composes Iodes; 041f 0420 041e 0418 0417 0412 041e 0414 0421 0422 0412 041e 0421 041e 0415 0414 0418 041d 0415 041d 0418 0419 041a 0421 0415 041d 041e 041d 0410 041f 041e 0421 0420 0415 0414 0421 0422 0412 041e 041c 0411 0415 0422 0410 - 0420 0410 0421 041f 0410 0414 0410 0419 041e 0414 0410 0412 0419 041e 0414 0418 0421 0422 042b 0425 0421 041e 0415 0414 0418 041d 0415 041d 0418 042f 0425 ; Produccion de Compuestos de Xenon por Desintegracion Beta del Yodo de Compuestos Yodados

    Energy Technology Data Exchange (ETDEWEB)

    Perlow, G. J.; Perlow, M. R. [Argonne National Laboratory, Argonne, IL (United States)

    1965-04-15

    O{sub 6} con absorbedor de clatrato, se triplico la fraccion que no experimenta retroceso, lo que implica un enlace mas fuerte. El KIO{sub 4} tambien produjo una sola raya, pero algo menos intensa. Con NalO{sub 3} como fuente y clatrato como absorbedor, se observo un desdoblamiento, lo que sugiere que el IO{sub 3}{sup -} {yields} XeO{sub 3}, transformacion que se comprobo al registrar un desdoblamiento identico en un absorbedor de XeO{sub 3} utilizado con una fuente de KIO{sub 4}. Un experimento realizado con KICI{sub 4} * H{sub 2}0 como fuente y clatrato como absorbedor acuso un desdoblamiento algo menor que el que presenta el XeF{sub 4}. En este caso ICI{sub 4}{sup -} -{yields} XeCl{sub 4}. Utilizando cristales alineados de KICI{sub 4} * H{sub 2}O y efectuando determinaciones cuantitativas de la intensidad, se demostro que la estructura cuadrada plana del ICI4 se conserva en la transicion a XeCl{sub 4}, y que en la reaccion no se forman XeCl{sub 2} ni Xe Degree-Sign en cantidades detectables. Con ayuda de Na{sub 3}H{sub 2}{sup 131}IO{sub 6} como fuente, se observo el efecto en el {sup 131}Xe. Comparando los espectros del XeF{sub 4} en ambos isotopos, se calibro el desdoblamiento en el {sup 129}Xe, lo cual permitio comparar cuantitativamente el XeF{sub 4} y el XeCl{sub 4} con el ICI{sub 4}{sup -} y el XeO{sub 3} con el IO{sub 3}{sup -}. El espectro no desdoblado del KIO{sub 4} indica que el ligando tetraedrico que circunda el yodo se conserva en el Xe04 resultante. Analogamente, el resultado relativo al paraperiodato esta en armonia con la conservacion del envolvente octaedrico. (author) [Russian] Izvestno, chto bol'shaja chast' beta-raspadov ne vyzyvaet izmenenij v jelektronnom chisle atoma, soderzhashhego raspadajushheesja jadro. Pri beta-raspade J{sup 129}-He{sup 129} v jodistom soedinenii jelektronnaja struktura i geometrija chasto podhodjat dlja obrazovanija soedinenija ksenona s takimi zhe ligandami. Jetot process byl otkryt i izuchen putem ispol'zovanija jeffekta

  2. Some factors influencing the absorption, retention and elimination of ruthenium; Facteurs agissant sur l'absorption, la retention et l'elimination du ruthenium; Nekotorye faktory, vliyakshchie na vsasyvanie, zaderzhku i vydelenie ruteniya; Factores que influyen sobre la absorcion, retencion y eliminacion de rutenio

    Energy Technology Data Exchange (ETDEWEB)

    Bruce, R. S. [Radiobiological Research Council, Medical Research Council, Harwell (United Kingdom)

    1963-02-15

    el suero inmediatamente despues de una inyeccion endovenosa o una administracion por via oral, pero desaparece con rapidez. Es probable que una vez que el rutenio sea absorbido en una forma que difunde libremente, parte del mismo reaccione con las proteinas del suero y que en un primer momento permanezca confinado en el espacio vascular; una parte es eliminada sin demora por los rinones y otra se difunde rapidamente en el espacio extravascular y en los tejidos. Esta ultima fraccion puede, bien reaccionar con el tejido y quedar retenida o difundirse de nuevo a la sangre, bien ser excretada. Despues de los primeros dias, la concentracion de rutenio en el suero disminuye a una velocidad que guarda una relacion estrecha con la velocidad de degradacion de las seroproteinas. Es posible que la retencion del rutenio en otros tejidos se rija tambien por su velocidad catabolica. (author) [Russian] Dva radioaktivnykh izotopa ruteniya, rutenij-103 (T1/2 = 40 dnej) i rutenij-106 (T1/2 = 1 god) obrazuyutsya v otnositel'no bol'shom kolichestve v rezul'tate rasshchepleniya urana-235. Pochti ket informatsii otnositel'no metabolizma ruteniya v organizme cheloveka, i privodimye soobrazheniya osnovyvayutsya ka issledovaniyakh krys i krolikov. KHarakter i razmer opasnosti, vyzyvaemoj radioruteniem, zavisit ne tol'ko ot uslovij zarazheniya, no i ot fizicheskogo i khimicheskogo sostoyaniya ruteniya. Rutenij-106, prinyatyj vnutr' v vide dvuokisi, vsasyvaetsya iz zheludochno-kishechnogo trakta v neznachitel'noj stepeni, kogda on prisutstvuet v forme chastits s nositelem, no pri vvedenii v vide kolloida bez nositelya pogloshchenie ego pochti takoe zhe, kak posle vvedeniya khlorida (3 - 5%). Nitratoproizvodnye nitroehila ruteniya mogut vsasyvat'sya eshche v bol'shej stepeni (u krolikov v srednem vsasyvaetsya okolo 13%). Vsasyvanie u negolodavshikh krys zakanchivaetsya v techenie odnogo chasa i ogranicheno vnutrizheludochnoJ dozoj. Ogranichennyj period vsasyvaniya mozhet ob'yasnyatsya skorost

  3. An Assessment of those Metabolites Considered to be of Value in the Diagnosis of Exposure to Radiation; Evaluation des Metabolites Consideres Comme Utiles dans le Diagnostic des Expositions aux Rayonnements; 041e 0426 0414 ; Evaluacion de los Metabolitos Considerados Utiles para Diagnosticar la Exposicion a las Radiaciones

    Energy Technology Data Exchange (ETDEWEB)

    Smith, H.; Bates, T. H. [United Kingdom Atomic Energy Authority, Chapelcross, Annan, Scotland (United Kingdom)

    1965-06-15

    -oblucheniju v terapevticheskih celjah. Jeti pacienty poluchili dozy do 5000 r za period ot treh do pjati nedel'. Vydelenie s mochej kreatina, kreatinina, obshhego {alpha}-amidnogo azota, {beta} aminoizom asljanoj kisloty, pirolle-2- karbonovoj kisloty, 5-oksiindoleaciticheskoj kisloty i indoksil-sul'fata soprovozhdalis' kolichestvenno v techenie vsego hoda lechenija. Nikto iz pacientov ne podvergalsja oblucheniju vsego organizma, no ochevidno, chto izmenenija v metabolicheskoj funkcii v rezul'tate povrezhdenija, vyzvannogo izlucheniem, mozhet skazat'sja na mochevom vydelenii. Obsuzhdaetsja biohimicheskaja ocenka i interpretacija jetih obrazcov vydelenija v otnoshenii toj chasti obluchennogo organizma, no na jetoj stadii issledovanija delaetsja vyvod, chto kolichestvennaja ocenka biologicheskogo povrezhdenija ne vozmozhna. Odnako takie opyty mogut byt' poleznymi v kachestve rukovodstva dlja klinicista otnositel'no jetogo vida terapii. Predvaritel'nye opyty na osnove izmenenij v nekotoryh metabolitah plazmy u krys, obluchennyh edinymi subletal'nymi dozami rentgenovskogo obluchenija, dostojny jekstrapoljacii dlja izuchenija chelovecheskogo organizma. Izmerjalis' koncentracii plazmy 5-oksitrip- taminovoj mochevoj kisloty, SGOT, SGPT, frakcii globulina proteina, fosfokinaza kreatina, aminopeptidaza lejcina, aminopeptidaza lizila, kalikreina, kallidina, cinka i marganca. Nabljudalis vse zhe znachitel'nye kolichestvennye izmenenija v urovnjah plazmy mochevoj kisloty, aminopeptidaza lejcina, aminopeptidaza lizila i marganca posle obluchenija. O b suzhdaetsja znachenie jetih dannyh. Vnimanie koncentriruetsja na prostyh i bystryh metodah. (author)

  4. Industrial Ultrasonic Inspection of Stainless-Steel Claddings for the EL4 Reactor; Controle Industriel par Ultrasons des Gaines en Acier Inoxydable du Reacteur EL4; Promyshlennyj kontrol' obolochechnykh trub iz nerzhaveyushchej stali reaktora dlya EL4 s pomoshch'yu ul'trazvukovogo metoda; Metodos Ultrasonicos para Control Industrial de las Vainas de Acero Inoxidable del Reactor EL4

    Energy Technology Data Exchange (ETDEWEB)

    Prot, A. C.; Foulquoer, H. E.; Peyrot, J. P. [Centre d' Etudes Nucleaires de Saclay (France)

    1965-09-15

    'nosti reaktorov. Podtverzhdaetsja, chto vybor metoda, kotoryj sleduet primenjat' i razrabatyvat', javljaetsja trudnym. Privodjatsja osnovnye momenty. Posle togo, kak v rezul'tate laboratornyh rabot sdelan vybor, voznikajut dve novye problemy: D) vnedrenie v promyshlennost' neobhodimost' ucheta dopustimogo kachestva v opredelennyj moment metodami izgotovlenija v svjazi s ustanovlennymi bolee ili menee proizvol'nym obrazom normami dlja priema. Jeto, v dejstvitel'nosti, obuslavlivaetsja neobhodimost'ju v statisticheskom issledovanii komplektov trub razlichnogo izgotovlenija i ih klassifikacii po otnosheniju k bolee ili menee strogim normam. Vidno, chto kolichestvo podlezhashhih kontrolju trub znachitel'no prevyshaet pervonachal'no namechennoe. Jeto vedet k izucheniju avtomaticheskogo kontrol'nogo mehanizma, sposobnogo udovletvorit' odnovremenno i trebovanijam tempa, i trebovanijam, vytekajushhim iz vybrannogo tipa kontrolja: poslednie obychno svodjatsja k mehanicheskomu kontrolju i nuzhdajutsja v osobenno tshhatel'no razrabotannoj konstrukcii. Sovokupnost' jetih soobrazhenij privela k razrabotke ustrojstva, temp raboty kotorogo uzhe sejchas mozhet bez truda pokryt' potrebnosti vsego cikla proizvodstva toplivnyh jelementov. Vozmozhnosti jetogo ustrojstva tesno svjazany s harakteristikami podobrannogo oborudovanija navedenija i kontrolja, v osobennosti so svojstvami jelektroniki priborov kontrolja po ul'trazvuku i so svojstvami ispol'zuemyh preobrazovatelej. K tomu zhe iz jetogo issledovanija javstvuet, chto standartnoe oborudovanie daleko ne sootvetstvuet probleme i chto uzhe sejchas sleduet predusmotret' osoboe ustrojstvo dlja dannogo tipa kontrolja. (author)

  5. Economics of Food Irradiation; Aspects Economiques de l'Irradiation des Denrees Alimentaires; Ehkonomicheskie aspekty oblucheniya pishchevykh produktov; Aspectos Economicos de la Irradiacion de Aumentos

    Energy Technology Data Exchange (ETDEWEB)

    Killam, E. R.; Ketchum, H. W.; Deitch, J.; Osburn, Jr., J. W. [United States Department of Commerce, Business and Defense Services Administration, Washington, DC (United States)

    1966-11-15

    ocenka provodjashhihsja v nastojashhee vremja rabot, imejushhih otnoshenie k perspektivam kommercheskogo obluchenija pishhevyh produktov v Soedinennyh Shtatah. V issledovanii priznaetsja, chto nel'zja obobshhat' dannye v otnoshenii perspektiv obluchenija pishhevyh produktov ni na osnove processov, ni na osnove produktov. Kak tehnicheskij tak i jekonomicheskij potencialy imejut shirokij diapazon izmenenij v otnoshenii razlichnyh pishhevyh produktov, kotorye podvergajutsja tem zhe ili razlichnym vidam obrabotki. Daetsja kratkij obzor i ocenka poslednih issledovanij v otnoshenii jekonomicheskih aspektov obluchenija produktov pitanija, a takzhe kratko izlagajutsja vyvody i zakljuchenija otnositel'no jekonomicheskih potencialov. Privoditsja obsuzhdenie reakcij predstavitelej promyshlennosti na predlagaemyj opytnyj obluchatel' mjasa, zakazchikami kotorogo javljajutsja amerikanskaja armija i Komissija po atomnoj jenergii SShA; koordinirovanie osushhestvljaet Ministerstvo torgovli; analizirujutsja faktory, kotorye opredeljat budushhee napravlenie, masshtab i kommercheskij uspeh sohranenija pishhevyh produktov s pomoshh'ju ionizirujushhego obluchenija. . Raboty vo vseh jetih kategorijah javljajutsja sushhestvennymi dlja dostizhenija uspeha, v protivnom sluchae oni javjatsja tormozjashhimi faktorami. Tem ne menee, uspeshnyj i vygodnyj sbyt obluchennyh pishhevyh produktov, v konechnom itoge, dolzhen byt' postavlen v zavisimost' ot akceptacii potrebitelem i vygodnogo vzaimootnoshenija mezhdu stoimost'ju i pribyl'ju . K vygodam sleduet otnesti bolee nizkuju stoimost' i bolee vysokuju pribyl' v rezul'tate sokrashhenija porchi, uvelichenija srokov hranenija i rasstojanija perevozok, rasshirenija rynka i uluchshenija kachestva. Nakonec, jekonomicheskij uspeh jetoj novoj tehnologii dolzhen zaviset' ot jasnogo dokazatel'stva togo, chto jeti vygody prevysjat dopolnitel'nye rashody po obrabotke na kakuju-to summu, kotoraja budet dostatochnoj dlja stimuljacii neobhodimyh chastnyh

  6. The Use of Tritium-Labelled Thymidine in Studies on the Synthesis of Deoxyribonucleic Acids; Emploi de la Thymidine Tritiee Dans L'etude de la Synthese de l'Acide Desoxyribonucleique; 0418 0441 043f 043e 0414 ; Empleo de Timidina Tritiada para Estudiar la Sintesis de los Acidos Desoxirtibonucleicos

    Energy Technology Data Exchange (ETDEWEB)

    Bianchi, P. A.; Crathorn, A. R.; Shooter, K. V. [Chester Beatty Research Institute, Institute of Cancer Research, London (United Kingdom)

    1962-02-15

    aktivnosti vseh promytyh gomogenizirovannyh kletok dal cifry, kotorye soglasujutsja s radioavtograficheskim analizom. Takim obrazom, pred- stavljaetsja, chto v jetoj sisteme ispol'zovanie radioavtografii dlja izmerenija sinteza DNK mozhno postavit' pod somnenie. Byl proveden analiz svjazi, aktiv- nosti v otsutstvii DNK, i bylo takzhe predprinjato podobnoe izuchenie obshhej kletochnoj aktivnosti tritija i aktivnosti otdelennoj DNK na drugih tipah kletok; jeti opyty takzhe dali podobnye razul'taty. Blagodarja jetim dannym stalo vozmozhnym razbit' process sinteza na razlichnye stadii: 1. pervonachal'noe pogloshhenie timidina kletkoj, 2. posledujushhee fosforiliro- vanie po krajnej mere v dva priema, 3. polimerizacija fosforilirovannogo timidina s prevrashheniem v DNK. Takim obrazom, hotja predpolozhenie o tom, chto pogloshhenie timidina kletkoj javljaetsja merilom sinteza DNK, javljaetsja slishkom uproshhennym, vse zhe predstavljaetsja, chto blagodarja ispol'zovaniju jetogo indikatora mozhno polu- chit' mnogo svedenij o predvaritel'nyh stadijah processa. (author)

  7. The Technique and Dosimetry of Pituitary Implantation Using Sources of Y{sup 90}; Technique et Dosimetrie de l'Implantation de Sources d'Yttrium-90 dans l'Hypophyse; ДОЗИМЕТРИЯ ИМПЛАНТИРОВАННЫХ В ГИПОФИЗ ИГЛ ИТТРИЯ-90; Dosimetria de la Implantacion de Fuentes de {sup 90}Y en la Hipofisis

    Energy Technology Data Exchange (ETDEWEB)

    Duggan, Mary H.; Jones, E.; Mallard, J. R. [Department of Physics, Hammersmith Hospital, London (United Kingdom); Joplin, G. F. [Department of Medicine, Postgraduate Medical School, London (United Kingdom)

    1963-03-15

    de implantacion consiste en elegir un tamano y una actividad de la fuente adaptados a las dimensiones de la glandula en cuestion. De esta manera, se procura que el procedimiento sea uniforme en todas las implantaciones. La forma de la glandula y el acceso a ella son tales que la mejor manera de lograr su destruccion completa es implantar dos fuentes, consistentes en varillas de Y{sub 2}O{sub 3} sintetizado (de 1 mm de diametro y de longitud adaptada a las dimensiones de la glandula). La actividad de la varilla se elige tambien convenientemente; en los casos caracteristicos esta comprendida entre 2 y 3 me. Los autores han encontrado experimentalmente la relacion entre la dosis de irradiacion por una parte y la geometria y la actividad por otra. Como absorbedor equivalente al tejido, utilizaron cera Mix D; como detector, una pelicula y como patron, una fuente calibrada de {sup 90}Sr ( que se desintegra formando {sup 90}Y). La memoria examina la validez de este procedimiento. Este trabajo permitio comprobar que la necrosis y la ablacion de la hipofisis requieren dosis que oscitan entre 100 000 y 200 000 rad. (author) [Russian] Udalenija gipofiza putem implantacii ittrievoj igly nahodit vse vozrastajushhee primenenie pri lechenii raka grudnoj i predstatel'noj zhelez,tak zhe kak pri lechenii diabeticheskoj retinopatii, bolezni Kushinga, akromegalii i, vozmozhno, jekzoftal'ma pri bazedovoj bolezni. IttriJ-90 javljaetsja naibolee podhodjashhim izotopom, kogda trebuetsja polnoe udalenie zhelezy, tak kejs on ispuskaet tol'ko beta-chasticy, maksimal'nyj radius dejstvija kotoryh (7 mm) soizmerim o razmerami zhelez. Implantacija v zhelezu sterzhnej standartnoj aktivnosti, nezavisimo ot ih velichiny, nedopustima iz-za standartnogo urovnja dozy, vvodimoj v zhelezy, togda kak cel'ju metoda implantacii javljaetsja vozmozhnost' vybora velichiny i aktivnosti istochnika sootvetstvenno razmeram rassmatrivaemoj zhelezy. Takim obrazom kachestvo metodiki mozhet sovershenstvovat'sja ot

  8. Determination of Radiotracer Stability of Tritium-Labelled Compounds in Biological Studies; Determination de la Stabilite des Composes Trities Employes comme Indicateurs en Biologie; 041e 043f 0440 0435 0434 0414 043b ; Determinacion de la Estabilidad de los Compuestos Tritiados en los Estudios Biologicos Mediante Indicadores

    Energy Technology Data Exchange (ETDEWEB)

    Okita, G. T.; Spratt, J. L. [Argonne Cancer Research Hospital and Department of Pharmacology, University of Chicago, Chicago, IL (United States)

    1962-02-15

    neobhodimost' proverki issledovateljami radioindikatornoj ustojchivosti (radiotracer stability) mechennyh tritiem soedinenij. Dazhe pri ochishhenii mechenyh soedinenij do postojannoj udel'noj aktivnosti ne iskljuchaetsja vozmozhnost' obmena vnutri biologicheskoj sistemy atomov tritija na vodorod. Pri uslovii predvaritel'noj tshhatel'noj radiohimicheskoj ochistki mechenogo materiala radioindikatornaja ustojchivost' mozhet byt' pokazana raznymi sposobami. V nastojashhem doklade opisyvajutsja tri raznyh metoda opredelenija radioindikatornoj ustojchivosti mechennyh tritiem soedinenij. Odin iz jetih metodov zakljuchaetsja v sopostavlenii biologicheskogo poluperioda zhizni mechennogo tritiem N{sup 3} soedinenija s poluperiodom zhizni analogichnogo soedi- nenija, mechennogo uglerodom S{sup 14}. Jetot metod osobenno udachno primenjaetsja v svjazi s gomogennymi veshhestvami, ispytyvajushhimi pri pogloshhenii ih zhivotnymi izo- topnoe razbavlenie. Ustojchivost' jekzogennyh soedinenij mozhet byt' pro- verena vtorym metodom. V takom sluchae neobhodimo lish' dokazat', chto pri povtornom izvlechenii iz biologicheskih obrazcov mechenogo materiala ne nabljudaetsja umen'shenija v nih udel'noj aktivnosti. Tretij metod, otnimajushhij men'she vremeni, chem pervyj, primenimyj kak k gomogennym, tak i k jekzogennym materialam, zakljuchaetsja v opredelenii izotopnogo sootnoshenija mezhdu N{sup 3} i S{sup 14} v smesi odnogo i togo zhe soedinenija, mechennogo oboimi jetimi izotopami. Sohranenie neizmennogo izotopnogo sootnoshenija do vvedenija dvazhdy mechennogo materala i posle povtornogo ego izvlechenija iz organov ili vydelenij dokazy- vaet radioindikatornuju ustojchivost'. Jetot metod osobenno podhodit dlja takogo sluchaja, kogda otdelenie malyh kolichestv materiala vyzyvaet neobhodimost' ispol'zovanija neradioaktivnogo nositelja. V kachestve primerov ispol'zovanija kazhdogo iz jetih treh metodov privodjatsja dannye po opredeleniju radio- indikatornoj ustojchivosti mechenyh holesteroda, morfija i

  9. Memorizing circuit for long pulses; Circuit de memoire pour impulsions longues; Zapominayushchee ustrojstvo dlya dlitel'nykh impul'sov; Circuito memorizador para impulsos de larga duracion

    Energy Technology Data Exchange (ETDEWEB)

    Coli, M; Horn, G [Sorin Centro Ricerche Nucleari di Saluggia (Italy)

    1962-04-15

    rasstoyaniya t (kontrol'noj kontur zaderzhki) nasyshchennym usilitelem, kotoryj udvaivaet vkhodnoj signal i daet cherez differentsiruyushchij kontur (izmeritel'nyj kontur zaderzhki) dva impul'sa. Vykhodnoj impul's podaetsya snova na vkhod cherez oslabitel' i liniyu zaderzhki. EHtot tsikl povtoryaetsya s chastotoj povtoreniya {approx} 1/{tau}. Zapominaemyj impul's imeet shirinu ot 50 mikrosekund do 10 millisekund, i bol'she. CHastota povtoreniya mozhet izmenyat'sya v intervale ot 10{sup 4} gts do 30 gts i menee. V samom doklade opisyvaetsya i drugoj kontur s ispol'zovaniem togo zhe samogo printsipa. Pomimo amplitudy i shiriny ehtot poslednij kontur mozhet zapominat' i formu vkhodnogo impul'sa. (author)

  10. Diffusion Parameters of BeO by the Pulsed Neutron Method; Calcul des Parametres de Diffusion de BeO par la Methode des Neutrons Pulses; Opredelenie diffuzionnykh parametrov BeO s pomoshch'yu metoda impul'snykh nejtronov; Determinacion de los Parametros de Difusion en el BeO por el Metodo de los Neutrones Pulsados

    Energy Technology Data Exchange (ETDEWEB)

    Joshi, B. V.; Nargundkar, V. R.; Subbarao, K. [Atomic Energy Establishment Trombay, Bombay (India)

    1965-08-15

    'nogo vremeni zapazdyvanija. Postojannaja raspada osnovnogo sostojanija plotnosti teplovyh nejtronov Oyla opredelena dlja neskol'kih lapla- sianov. Rassmatrivajutsja te uslovija, kotorye dolzhny byt' sobljudeny dlja tochnogo opre- delenija konstanty diffuzionnogo ohlazhdenija (S). Dlja VeO polucheny sledujushhie velichiny: {lambda}{sub 0} = postojannaja pogloshhenija = 156,02 {+-} 4,37 sek{sup -1}, D = kojefficient diffuzii = (1,3334 {+-} 0,0128) {+-} 10{sup 5} sm2/sek, S = postojannaja diffuzionnogo ohlazhdenija = (-4,8758 {+-} 0,5846) * 10{sup 5} sm{sup 4}/sek. Vyjavleny posledstvija prenebrezhenija V{sup 6} pri opredelenii diffuzionnyh parametrov, pokazano, chto jeti posledstvija javljajutsja znachitel'nymi i ob{sup j}asnjajut sushhestvovavshee v teche- nie dlitel'nogo vremeni rashozhdenie mezhdu znachenijami S, poluchennymi dlja odnogo i togo zhe zamedlitelja razlichnymi issledovateljami. (author)

  11. The use of radioactive tracers in lubrication and wear research; Emploi des indicateurs radioactifs dans les recherches sur la lubrification et l'usure; Ispol'zovanie mechenykh atomov pri issledovanii voprosov smazki i iznosa; Utilizacion de los indicadores radiactivos en los estudios sobre la lubricacion y el desgaste

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, R B; Grunberg, L; Milne, A A; Wright, K H.R. [Lubrication, Wear and Mechanical Engineering Aspects of Corrosion Division, National Engineering Laboratory, Thorntonhall, Glasgow (United Kingdom)

    1962-01-15

    chastitsy okisi zheleza ispol'zuyutsya dlya izucheniya ikh roli v protsesse iznosa. Reaktivnost' poverkh- nosti zakalennykh metallov izuchalas' s pomoshch'yu mechennoj uglerodom-14 stearinovoj kisloty i rastvora sery-35. Skorost' reaktsii v primesi masla dlya shesteren analizirovalas' putem propuskaniya korotkikh impul'sov ehlektrotoka po metallicheskim provodam, opushchennym v rastvory soedinenij, mechennykh seroj-35 i fosforom-32. Sozdanie stojkikh k istiraniyu plenok na poverkhnosti zub'ev shesterenok izuchalos' kak funktsiya nagruzki, skorosti i vremeni raboty. Vopros, vstrechayushchijsya vo mnogikh iz vidov ehtogo primeneniya, sostoit v prevrashchenii izmeryaemoj aktivnosti v absolyutnye kolichestva materialov, prisutstvuyushchikh na poverkhnosti plenok ili v produktakh iznosa. Dlya ehtoj zhe tseli ispol'zovalis' metody kalibrovaniya. (author)

  12. Reactions of Hot Tritium Atoms with Amino Acids; Reactions entre Atomes Chauds de Tritium et Acides Amines; Reaktsii goryachikh atomov tritiya s aminokislotami; Reacciones de Atomos de Tritio Calientes con Aminoacidos

    Energy Technology Data Exchange (ETDEWEB)

    Simonov, E. F.; Nesmejanov, An. N. [Moskovskij Gosudarstvennyj Universitet, Moskva, SSSR (Russian Federation)

    1965-04-15

    investigaron los rendimientos de las reacciones de los atomos calientes de tritio: a) con aminoacidos, de longitud de cadena creciente; b) con aminoacidos de longitud de cadena constante, pero que contenian distintos grupos funcionales. Con esta finalidad irradiaron durante 15 min, con un flujo de 0,87 * 10{sup 13} neutrones lentos/cm{sup 2} * s, mezclas de carbonato de litio con los aminoacidos que se querian estudiar. Efectuaron los analisis cromato- graficos en fase gaseosa con ayuda de columnas intercambiables (tamices moleculares, parafina liquida en diatomeas) asi como por cromatografia sobre papel. Los datos obtenidos acerca de la resistencia a la radiolisis de los aminoacidos en funcion de la longitud de la cadena carbonada, aunque esten en contradiccion con una de las reglas fundamentales de la radioquimica, a saber, que la resistencia de las moleculas aumenta con el aumento de la longitud de su cadena, pueden explicarse por la transferencia intramolecular de energia a lo largo de la cadena carbonada, desde el lugar de impacto del atomo caliente al grupo oxidrilo y su subsiguiente ''desexcitacion''. En cambio, si bien la energia de los atomos de retroceso del tritio es mayor que la energia de enlace quimico, esta ultima influye en la resistencia a la radiolisis de las moleculas cuya longitud de cadena es la misma, pero que contienen distintos grupos funcionales. (author) [Russian] V literature v nastojashhee vremja otsutstvujut sistematicheskie dannye o vzaimodejstvii atomov otdachi tritija s aminokislotami. V to zhe vremja, takie dannye v sochetanii s imejushhimisja rezul'tatami dlja organicheskih kislot i aminov mogli by pomoch' ustanovit' mehanizm gorjachih reakcij, v zavisimosti ot struktury soedinenij (dlina cepi, funkcional'nye zamestiteli). Byli issledovany vyhody reakcii gorjachih atomov tritija: 1) s aminokislotami pri uvelichenii dliny cepi poslednih, 2) s aminokislotami odnoj dliny uglerodnoj cepi, no raznymi funkcional'nymi zamestiteljami. Dlja jetoj celi

  13. Liquid Scintillation Detection of Tritium and other Radioisotopes in Insoluble or Quenching Organic Samples; Detection par compteur a scintillations a liquides du tritium et des autres radioelements contenus dans des echantillons organiques insolubles ou coupeurs; Obnaruzhenie tritiya metodom zhidkostnoj stsintillyatsii v nerastvorimykh ili sposo'nykh gasit' izluchenie organicheskikh o'raztsakh; Deteccion del tritio u otros radioisotopos por centelleo liquido en muestras organicas insolubles o que provocan extincion

    Energy Technology Data Exchange (ETDEWEB)

    Eastham, J F; Westbrook, H L; Gonzales, D [University of Tennessee, Knoxville, TN (United States)

    1962-01-15

    stsintillyatsionnoe gashenie mnogimi organicheskimi obraztsami i ogranichennaya rastvorimost ' drugikh, prisushchi takzhe biologicheskim veshchestvam. Razrabotannye protsedury vklyuchayut v sebya okislenie obernutogo v fil'troval'nuyu bumagu obraztsa v kolbe, napolnennoj kislorodom, obrazovanie rastvora okislennykh produktov v sootvetstvuyushchem rastvoritele, dobavlennom v kolbu pered okisleniem, i stsintillyatsionnyj schet rastvora. Preimushchestva razrabotannykh protsedur dlya preodoleniya ukazannykh ogranichenij vklyuchayut: kachestvo operatsii s obraztsami bol'shogo diapazona aktivnosti (nekotorye s takoj nizkoj aktivnost'yu kak 1{mu}c//mo1e), bol'shuyu tochnost' (takuyu zhe kak pri lyubom drugom obshchem metode izmereniya radioaktivnosti H{sup 3}), i primenimost' k drugim myagkim beta-izluchatelyam (C{sup 14} i k{sup 35}). S pomoshch'yu stsintillyatsionnogo spektrometra i razrabotannykh protsedur mozhet byt' razdel'no izmerena radioaktivnost ' obraztsov mechennykh trizhdy H{sup 3}, C{sup 14} i k{sup 35}. Detali, kasayushchiesya sistem rastvoritelya i razrabotannykh metodov, budut izlozheny v doklade, krome togo v nem budet dana rabochaya kharakteristika novogo, otnositel'no nedorogogo odnokanal'nogo stsintillyatsionnogo spektrometra. Budut izlozheny analiticheskie rezul'taty, kasayushchiesya takogo gasyashchego izluchenie materiala, kak 2,4-dinitro-fenilgidrozony i tiazolidy, a takzhe takikh nerastvorimykh materialov, kak proteiny i ugolevdy. Budet obsuzhdeno primenenie metodov k otsenke izotopnogo ehffekta H{sup 1}/H{sup 3} v opredelennykh reaktsiyakh vosstanovleniya. (author)

  14. Manufacture of Wood-Plastic Combinations by Use of Gamma Radiation; Fabrication de combinaisons bois-matiere plastique a l'aide des rayons gamma; Proizvodstvo drevesno-plastmassovykh sostavov s pomoshch'yu gamma-izlucheniya; Impregnacion de maderas con materiales plasticos en presencia de radiaciones gamma

    Energy Technology Data Exchange (ETDEWEB)

    Kent, J. A.; Winston, A.; Boyle, W.; Updyke, L. [Engineering Experiment Station, West Virginia University, Morgantown, West Virginia (United States)

    1963-11-15

    maderas de pino albar, encina blanca, encina roja, alamo, abedul, haya, abeto y arce sacarino. Se indica el efecto de la intensidad de dosis sobre las velocidades de polimerizacion en esas combinaciones, algunas de las cuales son incompatibles. Por ejemplo, la secoya no permite la polimerizacion del acetato de vinilo o del metacrilato de metilo, en tanto que el pino albar imposibilita la polimerizacion del acetato de vinilo. Los autores estudiaron diversos agentes de reticulacion con miras a determinar su eficacia para acelerar la polimerizacion y, con ello, conseguir ciclos mas breves, y exponen los resultados obtenidos para el acrilato de alilo, el dimetacrilato de etilenglicol, el dimetacrilato de polietilenglicol, el titanato de tetra-isopropilo, el metacrilato de alilo y (en el caso del estireno) el divinilbenceno. Los ensayos mecanicos realizados con maderas impregnadas ponen de manifiesto una mejora de propiedades tales como la dureza, el limite de elasticidad en la compresion y la estabilidad dimensional. Por lo general, se registra un aurpento de la fragilidad respecto de la madera natural. En la memoria se incluyen datos sobre la dureza, el limite de elasticidad en la compresion, la estabilidad en la compresion, la estabilidad dimensional, asi como la resistencia a la flexion y al cizallamiento. (author) [Russian] Opisan promyshlennyj metod polucheniya drevesno-plastmassovykh ''splavov'' s pomoshch'yu gamma-izlucheniya. Protsess sostoit iz dvukh chastej: propitki otobrannoj drevesiny neobkhodimym monomerom i polimerizatsii monomera v meste nakhozhdeniya .s pomoshch'yu gamma-luchej. Izucheno vliyanie razlichnykh faktorov na proniknovenie monomera v drevesinu. Provedennye ispytaniya pokazali, chto na praktike osushchestvimo khoroshee raspredelenie polimera v konechnom produkte. Odnu chast' obraztsov tolshchinoj 10 cm i dlinoj 150 cm podvergli propitke i issledovali na pronikanie monomera, v to vremya kak druguyu chast' obraztsov takoj zhe tolshchiny uspeshno

  15. Quantitative Studies of the Reactions of Hot Tritium Atoms with Hydrocarbons and Hydrocarbon Mixtures; Etudes Quantitatives des Reactions des Atomes Chauds de Tritium avec les Hydrocarbures et les Melanges d'Hydrocarbures; Kolichestvennoe issledovanie reaktsij goryachikh atomov tritiya s gidrouglerodami i smesyami gidrouglerodov; Estudio Cuantitativo de las Reacciones de Atomos de Tritio Calientes con Hidrocarburos y Mezclas de Hidrocarburos

    Energy Technology Data Exchange (ETDEWEB)

    Urch, D. S.; Welch, M. J. [Department Of Chemistry, Queen Mary College. University of London, London (United Kingdom)

    1965-04-15

    zamedlitelem i bez nego; jetan i tetrametilmetan s gelievym zamedlitelem i bez nego. Vychisljajutsja velichiny a i I dlja treh reagirujushhih veshhestv iz jetih treh tipov sistemy i obsuzhdaetsja soglasie mezhdu rezul'tatami s tochki zrenija tochnosti modeli. Rezul'taty, poluchennye iz razlichnyh sistem, soglasujutsja v ramkah predelov jeksperimental'noj oshibki, i jeto pokazyvaet, chto model' kineticheskoj teorii mozhet primenjat'sja k sistemam gorjachih atomov s nekotoroj opredelennost'ju i chto sdelannye predpolozhenija pri rassmotrenii smesej javljajutsja razumnymi. Kojefficienty reaktivnosti gidrouglerodov v smesjah v otnoshenii reakcij zameshhenija ne javljajutsja temi zhe samymi, kak sootnoshenija chisla atomov vodoroda v gidrouglerodah. Poluchennye velichiny dlja jetih kojefficientov ob{sup j}asnjajutsja velichinami I i S (poperechnoe sechenie stolknovenija) dlja gidrouglerodov. (author)

  16. Fixation of Radionuclides in Titanium Dioxide and Titanates via co-Precipitation; Fixation de Radioelements dans le Bioxyde de Titane et dans les Titanates par Coprecipitation; 0424 0418 041a 0421 0410 0426 0418 042f 0420 0410 0414 0418 041e 0418 0417 041e 0422 041e 041f 041e 0412 0412 0414 0412 0423 041e 041a 0418 0421 0418 0422 0418 0422 0410 041d 0410 0418 1 0418 0422 0410 041d 0410 0422 0410 0425 041c 0415 0422 041e 0414 041e 041c 0421 041e 041e 0421 0410 0416 0414 0415 041d 0418 042f ; Fijacion de Radionuclidos en Dioxido de Titanio y Titanatos por Coprecipitacion

    Energy Technology Data Exchange (ETDEWEB)

    Levi, H. W. [Hahn-Meitner Institut fuer Kernforschung, Berlin-Wannsee, Federal Republic of Germany (Germany)

    1963-02-15

    vvedenija aktivnosti v jetot predvaritel'nyj produkt. Nedostatkami soosazhdenija javljajutsja trudnost' otdelenija vysokoaktivnogo shlamma ot rastvora i nizkaja stepen' udalenija cezija, a preimushhestvami - prigodnost' dlja predvaritel'nyh processov, menee ogranichennaja ob{sup e}mnaja emkost' po sravneniju s sorbcionnoj sposobnost'ju glinistyh mineralov i otsutstvie stadii vyparivanija. Pojetomu predstavljaetsja zhelatel'nym podrobnee rassmotret' himiju sootvetstvujushhih sistem soosazhdenija. Pervoj byla vybrana sistema TiO{sub 2} blagodarja horoshim fiksirujushhim kachestvam TiO{sub 2} i titanatov. Soosaditel'nye svojstva TiO{sub 2} * H{sub 2}O izuchalis' v razlichnyh jeksperimental'nyh uslovijah. Dlja nekotoryh radioizotopov kojefficient raspredelenija okazalsja takim zhe ili luchshim, chem v sluchae drugih gidratov okisi. Vysokaja koncentracija radioizotopa ili analogichnyh emu ionov vyzyvaet umen'shenie kojefficienta raspredelenija. Jetogo mozhno izbezhat' odnovremennym osazhdeniem karbonatov ili oksalatov, v rezul'tate kotorogo udaljaetsja osnovnoe kolichestvo ionov. Izuchalos' takzhe vlijanie aljuminija, prisutstvujushhego v bol'shih kolichestvah. Nachato issledovanie obrazovanija oktajedrita i rutila iz chistogo osadka TiO{sub 2} * H{sub 2}O i titanatov iz osadkov TiO{sub 2} * H{sub 2}O+ karbonat ili oksalat v processe vysokotemperaturnoj obrabotki. (author)

  17. Measurement of Caesium-137 in the Normal Person; Dosage du Cesium 137 chez un Sujet Normal; 0418 0417 041c 0414 ; Determinacion Cuantitativa del Cesio-137 en el Individuo Normal

    Energy Technology Data Exchange (ETDEWEB)

    Huycke, E. J.; Oberhausen, E. [United States Army Medical Research Unit, Europe, Landstuhl/Pfalz, Federal Republic of Germany (Germany)

    1964-11-15

    period poluvyvedenija cezija-137 koroche u bolee molodyh'ljudej. Jeto soglasuetsja s rannimi dannymi izmerenija soderzhanija cezija-137, poluchennymi na jetom schetchike v period s ijunja 1959 do dekabrja 1960 goda; jeti dannye ukazyvajut na men'shee soderzhanie cezija-137'u detej, chem u vzroslyh. Drugaja ocenka nedavno poluchennyh'v jetom medicinskom otdelenii dannyh kasaetsja standartnogo otklonenija (sigma) soderzhanija cezija-137 u bol'shoj gruppy naselenija. U jetoj gruppy naselenija sigma izmerennoj velichiny cezija na gramm kalija v organizme sostavila 33% . Jeto bolee chem v 2 raza prevyshaet sigmu soderzhanija kalija v organizme u toj zhe gruppy naselenija. Sravneniem dannyh dlja lic, u kotoryh neodnokratno bralis' analizy v techenie dlitel'nogo perioda vremeni so srednemesjachnymi velichinami u vsej gruppy obsledovannyh bylo najdeno, chto bol'shaja sigma soderzhanija cezija-137 ne mozhet ob{sup j}asnjat'sja lish' putem izmenenija diety u obsledovannoj gruppy. (author)

  18. Radioisotope Scanning of the Pancreas with Selenomethionine-Se{sup 75}; Gammagraphie du Pancreas a l'Aide de la Selenomethionine-{sup 75}Se; Diagnosticheskoe fotoskennirovanie podzheludochnoj zhelezy; Gammagrafia del Pancreas Mediante Radioisotopos

    Energy Technology Data Exchange (ETDEWEB)

    Sodee, D. B. [Doctors Hospital and Renner Clinic Foundation, Cleveland Heights, OH (United States)

    1964-10-15

    voznikajushhee v rezul'tate koncentraciiselenometionina - {sup 75}Se v pecheni izluchenie, kotoroe v proshlom meshalo tochnomu opredeleniju kontura podzheludochnoj zhelezy. Nedavno avtory ispol'zovali kristall razmerom 12,5 h 7,5 sm i 121-kanal'nyj svincovyj kollimator s fokusnym rasstojaniem 12,5 sm. Jeto uluchshilo kachestvo izobrazhenija, i po mere usovershenstvovanija metodiki mozhno budet, verojatno, videt' men'shie povrezhdenija na bol'shej glubine. Okazalos',chto karcinoma podzheludochnoj zhelezy koncentriruet selenometionina -Se75 . huzhe, chem normal'naja tkan'. S pomoshh'ju jetoj metodiki udalos' pravil'no istolkovat' zabolevanie u 5 iz 6 bol'nyh, stradajushhih karcinomoj podzheludochnoj zhelezy. Nepoddajushhiesja obnaruzheniju Mel'chajshie karcinomatoznye uzly byli zatemneny uvelichennoj pechen'ju. Diagnoz ostrogo i hronicheskogo pankreatita takzhe podtverzhdaetsja skennirovaniem podzheludochnoj zhelezy, poskol'ku povrezhdennye kletki podzheluzhochnoj zhelezy ne koncentrirujut selenometionin -{sup 75}Se. Avtor takzhe opisyvaet izbiratel'noe pogloshhenie selenometionina -{sup 75}Se tkan'ju para- shhitovidnoj zhelezy . S pomoshh'ju jetogo zhe metoda skennirovanija byli obnaruzheny adenomy parashhitovidnoj zhelezy u nebol'shoj gruppy bol'nyh s povyshennoj funkciej parashhitovid- noj zhelezy. Fotoskennirovanie podzheludochnoj zhelezy uzhe javljaetsja prakticheskim metodom, i v nastojashhee vremja vedetsja izuchenie fotoskennirovanija parashhitovidnoj zhelezy. Narjadu s vnov' probudivshimsja interesom k organam, kotorye byli nevidimy pri obychnyh radiograficheskih metodah, selektivnoe skennirovanie organov s pomoshh'ju soedinenij,soderzhashhih mechenye atomy i podobrannyh po ih biohemicheskim svojstvam, stanovitsja vazhnym metodom budushhego. (author)

  19. Diagnosis of Intracranial Lesions by Gamma-Encephalography using Human Serum Albumin Labelled with Iodine-131; Diagnostic des lesions intracraniennes par la gamma-encephalographie a l'aide de la serumalbumine humaine marquee a l'iode 131; Diagnoz vnutricherepnykh povrezhdenij putem gamma-ehntsefalografii pri pomoshchi mechenoj iodom-131 albuminovoj syvorotki cheloveka; Diagnostico de las lesiones intracraneanas por gammaencefalografia mediante sero- albumina humana marcada con yodo-131

    Energy Technology Data Exchange (ETDEWEB)

    Planiol, Therese [Institut National d' Hygiene, Paris (France)

    1959-07-01

    sto pyat'desyat sopovozhdalis' ochagom dlitel'noj povyshennoj gamma-aktivnosti. Opukholi, kotorye ne poddalis' obsledovaniyu, yavlyayutsya napolovinu opukholyami polushariya mozga, a napolovinu - opukholyami zadnej polosti i shishkovidnoj zhelezy. Byli obnaruzheny gnojniki, krovyanye opukholi, mestnye vetvistye anevrizmy. Povrezhdenie mozgovoj tkani i krovenosnykh sosudov vyzvalo v odnoj treti sluchaev anomalii: polovina ehtikh anormal'nykh grafikov imeet formu, kharakternuyu dlya razmyagcheniya godovnogo mozga (ili tromboz), nalichie kotorogo mozhet byt' takim obrazom ustanovleno; drugie zhe napominayut grafiki opukholej s toj edinstvennoj raznitsej, chto anomalii ischezayut cherez neskol'ko nedel' v sluchayakh povrezhdeniya krovenosnykh sosudov; dve treti ehtikh povrezhdenij dayut otritsatel'nuyu gamma- ehntsefalogrammu. Rasshirenie arterij, bezopukhol'ny e ochagi, vyzyvayushchie pripadki ehpillepsii i razlichnye zabolevaniya chisto nevrologicheskog o kharaktera dali v 96% sluchaev normal'nye rezul'taty. Obsledovanie mozga pri pomoshchi radioaktivnog o albumina mozhet dat' tsennye svedeniya ne tol'ko o nalichii i tochnom mestonakhozhdeni i nevrokhirurgicheskikh povreyasdenij, no i v otnoshenii ikh kharaktera. V chastnosti, ono daet bol'shie vozmozhnosti dlya opredeleniya opukholej mozgovykh obolochek, gliom i metastazov. Ehti vozmozhnosti, sovmestno so svedeniyami, kasayushchimisya polozhitel'nogo i topograficheskogo diagnoza, pridayut dannomu vidu obsledovaniya osobyj interes po sravneniyu s drugimi metodami nevrologicheskog o diagnoza. Krome togo gamma-ehntsefalografi ya obeshchaet stat' odnim iz naibolee tochnykh sredstv dlya obnaruzheniya retsidivov i dlya nablyudeniya za khodom lecheniya obychnymi metodami ili radioterapii. (author)

  20. Detection of Beta-Emitting Nuclides of Energy >1 Mev in Urine After an Accident by Means of Measurement of the Cerenkov Effect in a Liquid Scintillation Counting System; Detection des Radioelements Emetteurs Beta d'une Energie Superieure a 1 Mev dans l'Urine Apres un Accident, par la Mesure de l'Effet Cerenkov Avec un Ensemble de Comptage a Scintillation Liquide; 041e 0411 041d 0414 ; Deteccion en la Orina de Emisores Beta de Energia Superior a 1 Mev, Despues de un Accidente, por Medicion del Efecto Cerenkov en un Contador de Centelleador Liquido

    Energy Technology Data Exchange (ETDEWEB)

    Narrog, J. [Landesinstitut fuer Arbeitsschutz und Arbeitsmedizin, Karlsruhe, Federal Republic of Germany (Germany)

    1965-06-15

    issledovaniju mochi. Kogda provodilis' jeksperimenty s mochoj, kotoraja ne byla predvaritel'no obrabotana, to izmerenija byli nechuvstvitel'nymi vvidu sil'nogo jeffekta absorbcii. Mochu sleduet podvergnut' ochistke. Pojetomu mochu okisljali s pomoshh'ju KMnO{sub 4}, v rezul'tate chego byla poluchena prozrachnaja zhidkost'. Fon byl ves'ma vysokim, poskol'ku kalij v KMnO{sub 4} soderzhit radioaktivnyj kalij-40, kotoryj takzhe ispuskaet beta-luchi s jenergiej bolee 1 Mjev (1,32 Mjev). My ispol'zovali NaMnO{sub 4} vmesto KMnO{sub 4} i poluchili luchshie rezul'taty. Fon sejchas sostavljaet primerno 30 otsch/min, prichem nizhnij predel (izmerennyj s pomoshh'ju Sr{sup 90}/Y{sup 90}) sostavljaet priblizitel'no 1 mkmkkjuri na 1 ml mochi. Esli v avarijnyh uslovijah nel'zja opredelit' soderzhanie radioaktivnogo kalija-40 v moche (naprimer, pri izmerenii soderzhanija kalija v moche s pomoshh'ju plamennogo fotometra), to takoj metod daet tochno takuju zhe chuvstvitel'nost', chto i drugie metody (naprimer, szhiganie i izmerenie v proporcional'nom schetchike s bol'shoj ploshhad'ju) v dannom sluchae (bolee 2 mkmkkjuri/ml). Izmerenie s pomoshh'ju proporcional'nogo schetchika s bol'shoj ploshhad'ju i dopolnitel'noe opredelenie beta-aktivnosti kalija-40 v moche javljaetsja bolee chuvstvitel'nym i bolee tochnym. Vysheupomjanutyj metod podhodit dlja bystrogo izmerenija bol'shogo soderzhanija aktivnosti v organizme (i posledujushhih jekskrementah) beta-nuklidov s jenergiej bolee 1 Mjev, chto neobhodimo pri avarijnoj situacii. Jeti metody trebujut dlja provedenija analiza ne bolee 90 minut. (author)

  1. Beta-Excited Sources of Electromagnetic Radiation; Sources de rayonnements electromagnetiques excites par des particules beta; Vozbuzhdennye beta-chastitsami istochniki ehlektromagnitnogo izlucheniya; Fuentes de radiacion electromagnetica excitadas por particulas beta

    Energy Technology Data Exchange (ETDEWEB)

    Cameron, J F; Rhodes, J R [Physics Group, Isotope Research Division, (AERE), Wantage Research Laboratory, Wantage, Berks (United Kingdom)

    1962-01-15

    incluyen cuadros que permiten escoger la fuente optima para absorbentes de distintos espesores. (author) [Russian] Avtory dayut opisanie vozbuzhdennykh beta-chastitsami istochnikov ehlektromagnitnogo izlucheniya v ehnergeticheskom rajone ot 1 do 200 kehv i prigodnykh dlya promyshlennogo ispol'zovaniya. V kachestve istochnikov beta-chastits byli vzyaty tritij, prometij-147, kripton-85, tallij-204 i strontsij-90+ ittrij-90, poskol'ku oni imeyut prodolzhitel'nyj period poluraspada, nebol'shuyu stoimost', vysokuyu udel'nuyu aktivnost' i legkost' ikh polucheniya. Dlya izgotovleniya vozbuzhdennykh beta-chastitsami istochnikov staralis' dostignut' kompromissa mezhdu prakticheskimi trebovaniyami konstruktsii i nailuchshej teoreticheskoj ehffektivnost'yu v dannoj ehnergeticheskoj zone. V dannoj annotatsii avtory raz{sup y}asnyayut putem podscheta kolichestva protonov, izluchaemykh beta-chastitsami, i predusmatrivayut vnesenie izmenenij v ehti podschety dlya samoabsorbtsii rentgenovskogo izlucheniya. EHti podschety uchityvayut v to zhe samoe vremya tormoznoe izluchenie i kharakteristicheskie flyuorestsentnye luchi, maksimal'nyj vykhod kharakteristicheskikh luchej, dostigaemyj dlya mishenej Z ot 40 do 60. Nakonets, oni utverzhdayut, chto v zhelaemoj ehnergeticheskoj zone poluchayut kak luchshij vykhod fotonnogo izlucheniya so ''sloenymi'' mishenyami, sloj polovinnogo oslableniya kotorogo sootvetstvuet dline probega 1-2 beta. Alyuminij, serebro i zoloto s proizvodstvennoj tochki zreniya yavlyayutsya podkhodyashchimi ehlementami dlya pokrytiya istochnikov. Oni takzhe dayut udovletvoritel'nye vykhody tormoznogo izlucheniya i rentgenovskogo izlucheniya i raspredelenie po razlichnym ehnergeticheskim zonam v radiuse ot 0 do 200 kehv pri pravil'nom ob{sup e}dinenii s vysheukazannymi beta-izluchatelyami. Dayutsya nekotorye ehnergeticheskie spektry i privodyatsya krivye pogloshcheniya v alyuminii i zheleze dlya nailuchshikh kombinatsij istochnikov mishenej. Byla obnaruzhena neznachitel

  2. Research Applications of Beta-Particle Techniques: Back-Scattering and X-Ray Excitation; Applications de l'irradiation beta dans la recherche: retrodiffusion et excitation de rayons X; Primenenie metodov beta-chastits v issledovatel'skoj rabote: obratnoe rasseyanie i vozbuzhdenie rentgenovskikh luchej; Aplicacion de la irradiacion beta en la investigacion: retrodispersion y excitacion de rayos X

    Energy Technology Data Exchange (ETDEWEB)

    Mueller, R H [Los Alamos Scientific Laboratory, University of California, Los Alamos, NM (United States)

    1962-01-15

    vyvedeny tochnye uravneniya dlya vsekh ehtikh yavlenij; nekotorye iz nikh ehmpiricheskim putem, a nekotorye sushchestvenno na teoreticheskoj osnove. Interesno otmetit', chto ehti uravneniya pravil'no predusmatrivayut optimal'nye parametry istochnika, soglasno opredeleniyam drugikh issledovatelej, kak v SSHA, tak i zagranitsej. Nuzhno dumat', chto ehti metody ukreplyayut mnenie, chto radioaktivnym izotopam suzhdena gromadnaya nauchnaya i tekhnicheskaya budushchnost'. CHto zhe kasaetsya istochnikov rentgenovskikh luchej, nuzhno skazat', chto vse v tekhnologii rentgenovskikh luchej, za isklyucheniem vyyavleniya kristallicheskoj struktury, mozhet byt' bolee legko dostignuto ehtimi sposobami. Pri nalichii istochnikov moshchnost'yu v neskol'ko kyuri, veroyatno, mozhno budet razreshit' dazhe i ehtu poslednyuyu zadachu. (author)

  3. Pulsed Irradiation Studies in Mice, Rats and Dogs; Etudes sur l'Exposition de la Souris, du Rat et du Chien a des Rayonnements Pulses; Impul'snoe obluchenie myshej, krys i sobak; Estudios sobre la Irradiacion Pulsante de Ratones, Ratas y Perros

    Energy Technology Data Exchange (ETDEWEB)

    Ainsworth, E. J.; Leong, G. F.; Kendall, K.; Alpen, E. L.; Albright, M. L. [US Naval Radiological Defense Laboratory. San Francisco, CA (United States)

    1964-05-15

    } rad/min dlja myshej i Tilde-Operator 2,0 * 10{sup 5} rad/min dlja s obak ). V opytah na myshah DL{sub 30/50} zhivotnyh , obluchennyh nejtronami pri umerennoj moshhnosti dozy 40 rad/min ili gam m a -luch am i pri 100 rad/min, ne otlichalis' v znachitel'noj stepeni ot DL{sub 30/50} zhivotnyh, podvergnutyh takomu zhe oblucheniju, no v forme impul'snogo obluchenija. Podobno jetomu pri izuchenii vnezapnoj smerti u sobak, podvergnutyh odnostoronnemu nejtronnomu oblucheniju, ne obnaruzheno znachitel'noj raznicy v DL{sub 30/50} mezhdu gruppami, obluchennymi s moshhnost'ju 23 rad/min ili podvergnutymi impul'snomu oblucheniju s moshhnost'ju svyshe 1,5 * 10{sup 5} rad/min. Provedeny drugie issledovanija dlja opredelenija zavisimosti v os stanovlenija luchevogo porazhenija u myshej, sozdannogo po metodu rasshheplenija dozy obluchenija, ot moshhnosti, pri kotoroj sozdaetsja pervichnoe subletal'noe porazhenie. Sravnivalas' stepen' vosstanovlenija na 5 -j i 14-jden' posle obluchenijau grupp zhivotnyh, obluchennyh pri moshhnosti 40 ili 9 * 10{sup 4} rad/min, prichem zavisimosti vosstanovlenija ot moshhnosti dozy ne obnaruzheno. (author)

  4. Liver Scanning with Colloidal Radiogold; Exploration du foie a l'aide de l'or radioactif colloidal; Issledovanie pecheni pri pomoshchi radioaktivnogo kolloidal'nogo zolota; Exploracion del higado con oro coloidal radiactivo

    Energy Technology Data Exchange (ETDEWEB)

    Donato, L; Becchini, M F; Panichi, S [Centro di Medicina Nucleate, University of Pisa (Italy)

    1959-07-01

    esquemas anatomico y funcional. (author) [Russian] Avtory soobshchayut o svoem opyte v ispol'zovanii kolloidal'nog o zolota Ah{sup 198} dlya issledovaniya pecheni. Dlya polucheniya chetkogo razgranicheniya pecheni ot sosednikh organov i okru-zhayushchikh tkanej obychno trebuetsya doza mechenykh ehlementov, sootvetstvuyushcha ya 2,5 {mu}C/Kg. Vsya protsedura issledovaniya, kotoraya nachinaetsya cherez 30 minut posle vnutrivennogo vspryskivaniya, zanimaet okolo 90 minut pri ispol'zovanii polnost'yu avtomaticheskoj apparatury. Verkhnie i bokovye kontury pecheni obychno luchshe razlichayutsya chem nizhnie. Ispol'zovanie fokusiruyushchi kh kollimatorov (poristogo tipa) znachitel'no uluchshaet poluchaemye rezul'taty. V obychnykh usloviyakh pechen' yavlyaetsya edinstvennym organom, kotoryj chetko viden na ehkrane. V nekotorykh sluchayakh pri splenomegalii i tsirroza pecheni mozhno krome togo videt' i selezenku, veroyatno v svyazi s sokrashcheniem retikulo-ehndotelialyyuj sistemy pecheni. Sudya po priobretennomu avtorami opytu, dannyj metod ves'ma maloehffektive n dlya opredeleniya nebol'shikh metastazov pecheni, kotorye ne izmenyayut ob{sup e}ma i Formy poslednej. Dazhe v sluchayakh podtverzhdennog o operatsiej nalichiya mnozhestva razbrosannykh melkikh uzelkov metastaticheskog o kharaktera issledovaniya ehtim metodom dali neyasnye rezul'taty. Ispol'zovanie radioaktivnog o zolota-198 mozhet v sluchayakh rasseyannogo ili zonal'nogo rasshireniya - nezavisimo ot prichiny - sposobstvovat' vyyasnesho, vyzvany li ehti izmeneniya rasshireniem normal'no funktsioniruyushche j tkani ili zhe nalichem v tkani pecheni patologicheski kh obrazovanij. Ochen' udalnym okazalos' sochetanie radioizotopnog o issledovaniya pecheni s issledovaniem ee konturov rentgenovskimi luchami posle provedeniya pnevmoperitoneuma, tak kak ono pozvolyaet provesti sravnenie mezhdu anatomicheskim i funktsional'ny m sostoyaniem dannogo organa. Kontury, poluchaemye na stsintigrammakh i na rentgenovskikh snimkakh

  5. Transverse Injection Experiment; Injection Transversale; Poslednie dostizheniya v oblasti inzhektirovaniya plazmy poperek magnitnogo polya; Inyeccion Transversal

    Energy Technology Data Exchange (ETDEWEB)

    Hammel, J. E.; Baker, D. A. [Los Alamos Scientific Laboratory, Los Alamos, NM (United States)

    1966-04-15

    ) [Russian] Dvizhenie plazmy, inzhektiruemoj poperek magnitnogo polja, rassmatrivalos' rjadom avtorov. V rannih jeksperimentah s inzhektirovaniem bystroj (5 Division-Sign 7 * 10{sup 7} sm/sek) i plotnoj (10{sup 14} cm{sup -3}) plazmy poperek magnitnogo polja nabljudalos' pojavlenie poljarizacionnogo jelektricheskogo polja,i struja plazmy peresekala magnitnoe pole s E x B drejfom. Magnitnoe pole slabo vozmushhalos' plazmoj (| {Delta}B/B | <0.1), v to vremja kak skorost' drejfa poperek magnitnogo polja naprjazhennost'ju do 5 kgs byla priblizitel'no ravna skorosti inzhektirovannoj strui. Struja szhimalas' v napravlenii perpendikuljarnom V i V po mere prodvizhenija v oblast' sil'nogo magnitnogo polja. V to zhe vremja izmerenija plotnosti jelektronov interferometricheskim metodom s pomoshh'ju He-Ne lazera pokazyvajut, chto poperechnoe pole naprjazhennost'ju do 7 kgs ne vyzyvaet zametnogo smeshhenija strui v napravlenii polja. Predstavljaet interes povedenie strui, kogda ona peresekaet oblast', v kotoroj magnitnoe pole menjaet svoe napravlenie otnositel'no linii nulevogo polja. Pri peresechenii struej . separatrissy mezhdu dvumja magnitnymi silovymi linijami jelektricheskoe pole dolzhno menjat' napravlenie, esli drejf prodolzhaetsja. Struja ostaetsja v oblasti separatrissy, togda kak vdol' silovyh linij magnitnogo polja izmerjajutsja bol'shie toki, svjazyvajushhie perednjuju chast' strui s posledujushhimi chastjami. Izoljatory, postavlennye dlja preryvanija jetogo toka, pozvoljajut strue dvigat'sja v oblast' polja obratnoj poljarnosti. Ispol'zuja induktivnost', svjazannuju s tokom depoljarizacii strui, mozhno proizvesti razdelenie bystryh i medlennyh komponentov strui. Otsechka medlennogo komponenta strui nabljudaetsja s pomoshh'ju interfe- rometricheskih metodov s primeneniem He-Ne lazera. Izmerenija jelektricheskogo polja v neskol'kih tochkah vdol' techenija pokazyvajut nekotorye iz naibolee slozhnyh osobennostej potoka plazmy. (author)

  6. Group cross-sections for fast reactors; Sections efficaces de groupes pour les reacteurs a neutrons rapides; Gruppovye secheniya reaktorov na bystrykh nejtronakh; Secciones eficaces de grupos para reactores rapidos

    Energy Technology Data Exchange (ETDEWEB)

    Zweifel, P P [University of Michigan, Ann Arbor, MI (United States); Ball, G L [Atomic Power Development Associates, Inc., Detroit, MI (United States)

    1962-03-15

    entre coeficientes de difusion de grupos, capacidad de moderacion y secciones eficaces de absorcion. Se demuestra que la definicion de las secciones eficaces de absorcion de grupos basada en integrales de resonancia eficaz que se emplea frecuentemente no es correcta, siendo preciso modificarla de acuerdo con el metodo de grupos multiples que se utilice. (author) [Russian] Daetsya obshchij obzor mnogogruppovykh diffuzionnykh uravnenij i rassmatrivaetsya pravil'naya forma gruppovykh poperechnykh sechenij. V chastnosti, pokazano, chto srednee poperechnoe sechenie perenosa mozhet do nekotoroj stepeni priblizitel'no byt' vyrazheno v vide srednej velichiny svobodnogo probega. Podschet takogo kolichestva zanimaet mnogo vremeni, tak kak on ne poddaetsya vyrazheniyu v vide ehlementarnogo usredneniya ; odnako podtverdilis' nekotorye neravnomernosti chto uproshchaet neobkhodimyj metod usredneniya. Rassmatrivayutsya tri sleduyushchikh voprosa gruppovykh poperechnykh sechenij, kotorye chasto ignoriruyutsya, no kotorye mogut imet' znachenie pri detal'nom izuchenii proekta : a) Ispol'zovanie odnoj i toj zhe serii usrednennykh po gruppam sechenij dlya vsekh reaktorov na bystrykh nejtronakh nichego ne daet, esli spektry razlichnykh reaktorov ne odinakovy i esli secheniya bystro izmenyayutsya v gruppe; takoe polozhenie chasto imeet mesto. Daetsya opisanie metoda povtoreniya, posredstvom kotorogo ustanavlivaetsya pravil'noe usrednenie, i ehtot metod ispol'zuetsya dlya opredeleniya vliyaniya spektral'nykh ehffektov na reaktornye raschety. b) Pri raschetakh perenosa, takikh, kak S{sub n} usredneniya dolzhny byt' vypolneny kak po uglu, tak i po ehnergii. Tak kak potok nel'zya razdelit' na 'uglovoj' i 'ehnergeticheskij', neobkhodimo ochen' tshchatel'no izbegat' oshibochnykh rezul'tatov. Uravnenie S{sub n} izuchaetsya v vide prostoj modeli, i poluchaetsya kriterij, kotoryj mozhet okazat'sya poleznym pri opredelenii znacheniya uglovoj nerazdelimosti v reaktornykh raschetakh. c) Na osnove

  7. Effects of Radiation on Germ Cells of Insects: Dominant Lethals, Gamete Inactivation and Gonial-Cell Killing; Effets des rayonnements sur les cellules germinales des insectes: letalite dominante, inactivation des gametes et destruction des cellules des gonades; Vozdejstvie radiatsii na polovye kletki nasekomykh: dominantnye letali, inaktivatsiya gamet i umershchvlenie polovykh kletok; Efectos de las radiaciones sobre las celulas germinales de los insectos: elementos letales dominantes, inactivacion de los gametos y exterminacion de las celulas gonadicas

    Energy Technology Data Exchange (ETDEWEB)

    Von Borstel, R. C. [Biology Division, Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1963-09-15

    (otryad nastoyashchikh poluzhestkokrylykh Coccldae)) predstavlyayut soboyu osobye sluchai, i ikh reaktsiya na obluchenie znachitel'no otlichaetsya ot reaktsii nasekomykh drugikh vidov. Pri istreblenii populyatsij nasekomykh oblucheniem samtsov dominantnaya detal'nost' predstavlyaetsya stol' zhe perspektivnoj dlya vidov s odnokratnym sparivaniem, kak i dlya vidov s mnogokratnym sparivaniem. Inaktivatsiyu spermy i umershchvlenie polovykh kletok mozhno schitat' primerami polucheniya istinnoj steril'nosti, naibolee ehffektnoj dlya vidov, gde sparivanie proiskhodit odnokratn'. Dlya naibolee ehffektivnogo istrebleniya dolzhny vybirat'sya takie dozy, kotorye vedut k polucheniyu maksimal'noj dominantnoj letal'nosti, proizvodyat minimal'nuyu inaktivatsiyu spermy i vyzyvayut polnoe umershchvlenie polovykh kletok. Ehti parametry legko poddayutsya opredeleniyu posredstvom izmereniya zhiznesposobnosti gamet, ehksperimentami s konkurentsiej mezhdu obluchennymi i neobluchennymi populyatsiyami, a takzhe gistologicheskim issledovaniem gonad. (author)

  8. The Use of Technetium-99m as a Clinical Scanning Agent for Thyroid, Liver and Brain; Utilisation du {sup 99m}Tc comme Agent d'Exploration Clinique de la Thyroide, du Foie et du Cerveau; Ispol'zovanie Tc{sup 99m} kak klinicheskogo agenta pri skennirovanii shchitovidnoj zhelezy, pecheni i mozga; Empleo del {sup 99m}Tc como Agente para la Exploracion Clinica de la Tiroides, el Higado y el Cerebro

    Energy Technology Data Exchange (ETDEWEB)

    Harper, P. V.; Lathrop, K. A.; McCardle, R. J.; Andros, G. [Argonne Cancer Research Hospital and Department of Surgery, University of Chicago Hospitals and Clinics, Chicago, IL (United States)

    1964-10-15

    selectivamente por la tiroides, el estomago y las glandulas salivales. Los datos facilitados por la excrecion indican que su periodo biologico es de unos 2 d. Con una dosis de irradiacion calculada en 100 mrad para la glandula y en 5 mrad para el cuerpo entero, se pueden efectuar exploraciones tiroideas de muy buena calidad entre meedia hora y una hora despues de administrar 1 me de esta sustancia lo que representa una gran ventaja sobre el {sup 131}I. El TcO{sub 4} no atraviesa libremente la barrera hematoencefalica, lo que ha permitido obtener excelentes imagenes del cerebro con un tiempo de exploracion de 2 a 5 min aprovechando el elevado fndice de recuento correspondiente a dosis de 5 a 10 me de {sup 99m}Tc. Como el tiocianap pentavalente se disuelve en una emulsion de grasa, gran parte del {sup 99m}Tc se localiza en el higado; en este caso el elevado fndice de recuento permite tambien proceder a una rapida exploracion de esta glandula con un'mayor poder de resolucion. Es muy probable que este tipo de mejores resultados aun utilizando sondas mas eficaces y adaptando los parametros biologicos y quimicos a condiciones optimas. (author) [Russian] Pri poiskah ''ideal'nogo'' izotopa dlja skennirovanija tehnecij-99m, povidimomu, imeet mnogo preimushhestv. Jeto veshhestvo javljaetsja chistym gamma-izluchatelem s jenergiej 140 kjev (9% konveosija) otsutstvii izluchenija chastic, imeet shestichasovoj fizicheskij period poluraspada, umerennuju stoimost', javljaetsja dostupnym dochernim produktom molibdena-99 s periodom poluraspada 2,7 dnja, ot kotorogo on legko otdeljaetsja na kolonke s okis'ju aljuminija. V obychnoj forme (Tc{sup 99m}O{sub 4}{sup -}) on raspredeljaetsja v organizme tak zhe kak CIO{sub 4}{sup -} i J, bystro rasprostranjajas' vo vnekletochnom prostranstve, izbiratel'no zahvatyvaetsja shhitovidnoj zhelezoj, zheludkom i sljunnymi zhelezami. 5 sootvetstvii s dannymi vydelenija period poluvyvedenija sostavljaet priblizitel'no dva dnja. Chetkie skennogrammy shhitovidnoj

  9. Fission-Fragment Angular, Energy, and Mass Division Correlations for the U{sup 234} (d, Pf) Reaction; Correlation des Angles, des energies et des Masses pour les Fragments de Fission Produits par la Reaction {sup 234}U(d, pf); K 041e 0420 0420 0415 041b 042f 0426 0418 042f 041c 0415 0416 0414 0423 0420 0410 0421 041f 0420 0415 0414 0415 041b 0415 041d 0418 0415 041c 041e 0421 K 041e 041b K 041e 0412 0414 0415 041b 0415 041d 0418 042f 041f 041e 0423 0413 041b 0423 , 041f 041e 042d 041d 0415 0420 0413 0418 0418 0418 041f 041e 041c 0410 0421 0421 0415 0412 0420 0415 0417 0423 041b 042c 0422 0410 0422 0415 0420 0415 0410 K 0426 0418 0419 (d, pf) 0423 0420 0410 041d 0410 -234; Correlaciones Entre la Distribucion Angular, la Energia y la Division Masica de los Fragmentos en la Reaccion {sup 234}U (d, pf)

    Energy Technology Data Exchange (ETDEWEB)

    Vandenbosch, R. [University of Washington, Seattle, WA (United States); Unik, J. P.; Huizenga, J. R. [Argonne National Laboratory, Argonne, IL (United States)

    1965-07-15

    pruebas de que les propiedades del punto de estrangulacion influyen sobre la division final de las masas. El promedio de la energia cinetica total liberada en la fision varia en menos del 0,5% para los distintos canales observados en el punto de estrangulacion. Tambien se ha estudiado la variacion de la energia cinetica total en funcion de la razon masica. (author) [Russian] Delenie slozhnogo jadra urana-235 pri priblizhenii k porogu ego delenija izuchalos' pri pomoshhi reakcii (d, pf) urana-234. V celjah odnovremennoj registracii dlja kazhdogo sovpadajushhego sobytija dvuh kineticheskih jenergij oskolkov delenija i jenergij protona byl ispol'zovan trehparametrovyj analizator. Jenergija vozbuzhdenija, pri kotoroj proishodit delenie, opredeljaetsja kineticheskoj jenergiej sryva protona. Izmenenie uglovoj anizotropii v zavisimosti ot jenergii vozbuzhdenija ukazyvaet na znachitel'no bol'shuju zavisimost' ot struktury, chem jeto bylo polucheno Lamfirom dlja togo zhe jadra v rezul'tate bombardirovki urana-234 bystrymi nejtronami. V sedlovine nabljudalos' po men'shej mere vosem' kanalov delenija dlja intervala jenergii mezhdu porogom i 2 Mjev svyshe poroga. Dlja bolee znachitel'nyh deformacij, bolee tochno opisyvajushhih konfiguraciju sedloviny, oyli prodelany raschety tipa nilssona dlja jenergii odinochnoj chasticy dlja deformirovannogo jadra. Sostojanija odinochnoj chasticy, vyjavlennye Lamfirom, sovmestimy s podschitannymi sostojanijami, priolizhajushhimisja k poverhnosti Fermi dlja ogranichennyh deformacij sedloviny. Glavnoj prichinoj dlja provedenija jetogo jeksperimenta bylo stremlenie izyskat' vozmozhnuju korreljaciju mezhdu asimmetriej massy i uglovoj anizotropiej. Vyhody massy, poluchennye' iz korrelirovannyh jenergij oskolkov, ne ukazyvajut na izmenenie anizotropii v zavisimosti ot massovogo sootnoshenija v protivopolozhnost' jeksperimentam, v kotoryh jenergija vozbuzhdenija, pri kotoroj proishodit delenie, ne javljaetsja postojannoj, i pri kotoroj nabljudalas

  10. Graft Polymerization of Styrene to Polyethylene; Polymerisation par greffage du styrene sur des pellicules de polyethylene; Privitaya polimerizatsiya stirola k poliehtilen; Polimerizacion por injerto de estireno en polietileno

    Energy Technology Data Exchange (ETDEWEB)

    Silverman, J.; Srinivasan, S. I.; Phalangas, C. J. [Department of Chemical Engineering, University of Maryland, College Park, MD (United States)

    1963-11-15

    takzhe skorost' prevrashcheniya stirola v gomopolimer v suspenziyakh legkoj melkokristalliches koj kal'tsinirovannoj sody. Dlya opredeleniya kolichestva okklyudirovannogo gomopolimera provedeno issledovanie pod mikroskopom privitoj plenki. Rezul'taty pokazyvayut, chto bol'shaya chast' prirosta vesa v obraztsakh plenki usloalena okklyudirovannym gomopolimerom. V ehksperimentakh s legkoj melkokristallicheskoj kal'tsinirovannoj sodoj, pri kotorykh prirost vesa v znachitel'noj stepeni ob{sup y}asnyaetsya privitym sopolimerom, uvelichenie vesa nakhoditsya v primernoj linejnoj zavisimosti ot dozy, a skorost' reaktsii pochti proportsional'na kornyu kvadratnomu iz moshchnosti gamma-oblucheniya. Nizkaya ehnergiya aktivatsii dlya. skorosti reaktsii isklyuchaet vozmozhnost' kontrolya diffuzii v legkoj melkokristallicheskoj kal'tsinirovannoj sode i v tonkikh plenkakh pri moshchnostyakh oblucheniya nizhe 10{sup 5} r/hr. Pri ehksperimentakh v legkoj melkokristallicheskoj kal'tsinirovannoj sode pri temperature 18{sup o}C i moshchnosti dozy 7,2 x 10{sup 4} r/hr skorost' obrazovaniya gomopolimera takaya zhe, kak i v sluchae obrazovaniya polimera v chistoj stirole. Ehnergiya aktivatsii, ravnaya 3,5 kkal/moya{sup ,} pochti vdvoe men'she velichiny''dlya chistogo monomera. (author)

  11. Measurements with a Pulsed and Modulated Source in a Reactor; Mesures au Moyen d'une Source Pulsee et Modulee dans un Reacteur; Izmereniya v reaktore s pomoshch'yu impul'snogo i moduliruemogo is tochnika; Mediciones Efectuadas en Reactor con una Fuente Pulsada y Modulada

    Energy Technology Data Exchange (ETDEWEB)

    Rotter, W. [Centre d' Etude de l' Energie Nucleaire, Mol (Belgium)

    1965-10-15

    analizador multicanal. Como el flujo del generador es perfectamente sinusoidal, la respuesta del reactor puede integrarse en cada cuarto de perfodo, puesto que el circuito de medicion esta gobernado por el generador; por consiguiente, el tiempo de medicion es minimo. Los datos registrados sobre cinta perforada se analizan con ayuda de una calculadora numerica. (author) [Russian] Generator, vyhod nejtronov kotorogo izmenjaetsja v zavisimosti ot funkcii kakogo-to vremeni, byl razrabotan v issledovatel'skih laboratorijah Filipsa. Ego prakticheskaja pol'za v oblasti fiziki reaktorov byla prodemonstrirovana na serii izmerenij, provedennyh v reaktore BR-O 2 v podkriticheskom sostojanii. Horoshaja ustojchivost', vozmozhnost' proizvodit' rezkie izmenenija intensivnosti nejtronnogo potoka, impul'sirovat' vyhod ili modulirovat' ego sinusoidal'no, - vse jeto delaet takoj generator ochen' gibkim. On pozvoljaet ustanavlivat' reaktivnost' ({rho} = {Delta}k/{beta}) i vremja zhizni nejtronov ( Script-Small-L /{beta}) po razlichnym nezavisimym metodam. Tochnoe sravnenie jetih metodov vozmozhno, poskol'ku poslednie mogut byt' ispol'zovany bez izmenenija uslovij izmerenija. Ustanovleno: 1) {rho} na osnove zapazdyvajushhih nejtronov putem mgnovennogo umen'shenija vyhoda nejtronov; 2) {rho} na osnove mgnovennyh nejtronov putem ispol'zovanija impul'sov nejtronov; 3) Script-Small-L /{beta} putem soedinenija 1) i 2) dlja 0,5 $ < {rho} < 2 $ ; 4) Script-Small-L /{beta} na osnove peredatochnoj funkcii reaktora dlja moduliruemogo istochnika. Obsuzhdajutsja peredatochnye funkcii dlja oscilljatora reaktivnosti i dlja sinusoidal'no moduliruemogo istochnika. Pokazano, chto izmerenie Script-Small-L /{beta} vozmozhno dlja 0,1 $< {rho} < $ s uchetom primenenija moduliruemogo istochnika. Tot zhe metod takzhe daet reaktivnost' s pomoshh'ju otnoshenija mgnovennyh nejtronov k zapazdyvajushhim nejtronam dlja optimal'noj chastoty, prichem na praktike jeto proishodit nezavisimo ot dannyh, otnosjashhihsja k

  12. Construction, Cost and Use of an Enriched Uranium, Light-Water Subcritical Assembly; Assemblage Sous-Critique a Uranium Enrichi et Eau Legere; Realisation, Cout et Application; Realizatsiya i stoimost' podkriticheskoj sborki na obogashchennom urane i legkoj vode; Construccion, Coste y Aplicacion de un Conjunto Subcritico de Uranio Enriquecido

    Energy Technology Data Exchange (ETDEWEB)

    Vittoz, B.; Berthet, P.; Gavin, P.; Mandrin, C.; Robert, P.; Thurnheer, J. [Ecole Polytechnique de l' Universite de Lausanne (Switzerland)

    1964-02-15

    raznovelikih rasstojanijah. Kazhdyj plan sterzhnej javljaetsja istochnikom bystryh nejtronov i poglotitelem teplovyh. Za jetimi planami ispol'zujutsja diffuzionnye uravnenija dvuh grupp. Dostatochno znat' harakteristiki odnogo plana sterzhnej, chtoby opredelit' potok nejtronov po n-planam. Jeksperimental'noe opredelenie jetih harakteristik provedeno s uchetom vertikal'nogo izmenenija potoka nejtronov. Issledovanie prodolzhaetsja paralell'no s izucheniem vlijanija rasstojanija mezhdu sterzhnjami odnogo i togo zhe plana. (author)

  13. Latitudinal effect in the transport of radiocarbon from stratosphere to troposphere; Eflet de la latitude sur le transport du radiocarbone de la stratosphere a la troposphere; Vliyanie geograficheskoj shiroty na peremeshchenie radioaktivnogo ugleroda iz stratosfery v troposferu; Efecto de la latitud sobre el transporte del carbono radiactivo de la estratosfera a la troposfera

    Energy Technology Data Exchange (ETDEWEB)

    Tauber, Henrik [Carbon-14 Dating Laboratory, Dept. of Natural Sciences, National Museum, Copenhagen (Denmark)

    1962-01-15

    que se observan en los anillos concentricos de los arboles de los ultimos 1300 anos. (author) [Russian] Bol'shoe kolichestvo vydelennogo vzryvami bomb ugleroda-14 (priblizitel'no 3 Mc), kotoryj byl vybroshen glavnym obrazom v stratosferu, daet vozmozhnost' issledovat' puti pereneseniya uglekislogo gaza iz stratosfery v troposferu, a takzhe opredelit' vremya smeshivaniya v stratosfere i v troposfere. EHto dostigaetsya putem zamera tempa uvelicheniya soderzhaniya C{sup 14} v atmosfernom CO{sub 2} i v tkanyakh rastenij. Takie zamery sushchestvuyut dlya mnogikh mest. Izmerenie kolichestva ugleroda-14 na khlebnykh zlakakh v Danii pokazalo, chto v Danii za 1958-59 gg. soderzhanie S14 uvelichilos' na mnogo protsentov bol'she, chem srednee uvelichenie dlya vsego zapadnogo polushariya. K letu 1959 goda soderzhanie C{sup 14} prevysilo na 33% uroven' 1954 goda. Znachitel'nye uvelicheniya soderzhaniya C{sup 14} v 1958 i 1959 godakh, veroyatno, yavlyayutsya parallel'yu s pikovym vypadeniem strontsiya-90, obnaruzhennogo vesnoyu v te zhe samye gody v severnoj umerennoj zone. Prevyshenie soderzhaniya C{sup 14} v datskikh zlakakh svyshe urovnya dlya vsego zapadnogo polushariya zastavlyaet dumat', chto zagryaznenie C{sup 14} izmenyaetsya v zavisimosti ot geograficheskoj shiroty. EHto sootvetstvuet zaklyucheniyam, svyazannym s vypadeniem chastits, kotorye pri- nosyatsya iz stratosfery analogichnym tsirkulyatsionnym mekhanizmom. Takoe vozdejstvie geograficheskoj shiroty daet vozmozhnost' prosledit' puti pereneseniya radioaktivnogo ugleroda iz stratosfery v troposferu putem neposredstvennogo zamera aktivnosti C{sup 14} troposfericheskogo CO{sub 2} iz tselogo ryada obraztsov, sobiraemykh na shiroko rasseyannoj seti stantsij. V doklade daetsya otsenka masshtaba vozmozhnogo vozdejstviya geograficheskoj shiroty v otnoshenii ustojchivogo polozheniya do vzryva bomby. EHto vozdejstvie mozhet yavit'sya chast'yu ob{sup y}asneniya kratkosrochnykh ostsillyatsij v aktivnosti ugleroda-14

  14. Anisotropy of the Chemical Shift Tensor for Fluorines in UF{sub 6} : Application to the Fluorine Atom Movement Model; Anisotropie du Tenseur de Deplacement Chimique des Fluors dans UF{sub 6}: Application au Modele du Mouvement des Atomes de Fluor; Anizotropiya tenzora khimicheskogo zameshcheniya ftora v UF{sub 6}. Primenenie k modeli dvizheniya atomov ftora; Anisotropia del Tensor de Desplazamiento Quimico de los Atomos de Fluor en el UF{sub 6}: Aplicacion al Modelo del Movimiento de los Atomos de Fluor

    Energy Technology Data Exchange (ETDEWEB)

    Rigny, P. [Centre d' Etudes Nucleaires de Saclay (France)

    1965-10-15

    permanece unos 5 {mu}s en cada una de las posiciones, con una energia de activacion de 0,5 eV aproximadamente. (author) [Russian] Pervoe izuchenie polikristallicheskogo shestiftoristogo urana po metodu magnitnogo rezonansa ftora bylo provedeno R.Blinkom i dr. pri 40Mgc. Napomnim, chto spektr, poluchennyj pri nizkoj temperature (t <-20 Degree-Sign C) mozhno analizirovat' nalozheniem dvuh linij, chto podtverzhdaet strukturu, obnaruzhennuju Hordom i Strupom v rentgenovskih luchah, gde pri nalichii oktajedra UF{sub 6} s odnoj dlinnoj os'ju i dvumja korotkimi osjami atomy ftora raspredeljajutsja mezhdu dvumja mestopolozhenijami. Izmenenie spektra s temperaturoj - slijanie dvuh linij - daet osnovanie predpolagat' o nalichii peremeshhenija atomov ftora mezhdu dvumja mestopolozhenijami. Povtoriv jeti opyty pri 56,4 i 94Mgc, my smogli otmetit' nalichie sil'noj osevoj anizotropii tenzora himicheskogo zameshhenija (okolo 650 chastej na million). Linija pogloshhenija, poluchennaja v jetih uslovijah dlja poroshka, javljaetsja slozhnoj i podlezhit izucheniju, tem bolee esli uchest' funkciju formy f (h), kotoraja predstavljaet soboj prisushhuju chastichke poroshka verojatnost' poluchenija orientacii, vynuzhdajushhej rezonirovat' jetu chastichku pri znachenii h polja. Pri otsutstvii dvizhenija (spektr nizkoj temperatury) funkcija formy dlja kazhdoj iz dvuh linij (sootvetstvujushhaja dvum vidam'mestopolozhenija) poluchaet formu dlja vseh jekvivalentnyh atomov. Izvestno, chto parametry tenzorov himicheskih zameshhenij svidetel'stvujut o haraktere himicheskih svjazej. Takim putem prishli, v chastnosti, k tomu, chtoby pripisat' v osnovnom ionnyj harakter (I Asymptotically-Equal-To 1/2) svjazjam urana s dvumja naibolee udalennymi atomami ftora. Pri nalichii dvizhenija funkcija formy krajne raznoobrazna i zavisit ot tipa dvizhenija. Dlja UF{sub 6} izuchenie pri nalichii anizotropii pokazyvaet, chto atomy ftora odnoj toj zhe molekuly obmenivajutsja mezhdu soboj i chto kazhdyj atom zatrachivaet

  15. Quality Selection of Zircaloy-2 Canning Tubes by Ultrasonic Testing on Small Defects; Controle de la Qualite des Gaines en Zircaloy-2: Detection de Petits Defauts par les Ultrasons; Achestvennyjotb ortrub chatykh obolochek iz tsirkalloya-2 putem vyyavleniya nebol'shikh defektov s pomoshch'yu ul'trazvuka; Control de Calidad de los Revestimientos de Zircaloy-2 por Localizacion Ultrasonica de Pequenos Defectos

    Energy Technology Data Exchange (ETDEWEB)

    Van Der Linde, A. [Reactor Centrum Nederland, Petten (Netherlands); Deraad, J. A. [Roentgen Technische Dienst N.V., Rotterdam (Netherlands)

    1965-09-15

    , de los 93 tubos ensayados, 21 presentaban defectos transversales de 10 a 50 {mu}m de profundidad. Por consiguiente, puede afirmarse que el procedimiento indicado permite clasificar los tubos con arreglo a su calidad. (author) [Russian] Trubchatye obolochki iz cirkalloja-2 s vnutrennim diametrom 10,20 mm, tolshhinoj stenok 0,90 mm i dlinoj 1500 mm, prednaznachennye dlja proverki v kachestve pokrytija toplivnyh sterzhnej pri temperature 330 Degree-Sign S v reaktornoj petle s vodoj pod davleniem ispytyvalis' s pomoshh'ju ul'trazvuka s cel'ju obnaruzhenija defektov. Ispytyvaemye trubchatye obolochki byli postavleny izgotoviteljami v SShA, soedinennom Korolevstve i v Skandinavii. Nashe trebovanie, chtoby vse postavlennye trubki byli svobodny ot treshhin i drugih defektov razmerom svyshe 500 - 1000 mikron po dline i svyshe 25 - 50 mikron po glubine, ne bylo prinjato polnost'ju izgotoviteljami. Oni mogli garantirovat' tol'ko otsutstvie treshhin velichinoj svyshe 1000 mikron po dline i svyshe 50 mikron po glubine. V svjazi s tem, chto iz 93 ispytannyh trub tol'ko u dvuh byli obnaruzheny treshhiny velichinoj svyshe 50 mikron po glubine, reshili provodit' bolee stroguju proverku, v rezul'tate kotoroj mozhno bylo by obnaruzhivat' defekty velichinoj porjadka 10 - 50 mikron po glubine. Dlja obnaruzhenija i registracii takih nebol'shih defektov primenjalos' poluavtomaticheskoe ul'trazvukovoe impul'snoe oborudovanie, dejstvujushhee kak v prodol'nom, tak i v poperechnom napravlenijah, v kombinacii s sistemami propuskanija i mnogokanal'nym registratorom. Sistema razvertki byla otregulirovana takim obrazom, chto vnutrennie i naruzhnye defekty odnogo i togo zhe porjadka i razmera ukazyvalis' s odinakovymi amplitudami. Kalibrovanie oborudovanija proizvodili na iskusstvennyh defektah. Defekty, obrazovavshiesja v prodol'nom napravlenii, obnaruzhivalis' s pomoshh'ju razdel'noj sistemy datchik-priemnik s primeneniem fokusirovannogo puchka. Defekty, obrazovavshiesja v poperechnom napravlenii

  16. A transistorized 1024-channel neutron time-of-flight analyser; Selecteur transistorise de temps de vol pour neutrons, a 1024 canaux; Nejtronnyj analizator vremeni proleta s 1024 kanalami i s perevodom skhemy na tranzistory; Aparato transistorizado de 1024 canales para analizar tiempos de vuelo de neutrones

    Energy Technology Data Exchange (ETDEWEB)

    Giannelli, G [European Atomic Energy Community, CCR, Ispra (Italy)

    1962-04-15

    adaptabilidad y que sea posible modificar o ampliar si lo precisaran los experimentadores. (author) [Russian] Daetsya opisanie nejtronnogo analizatora vremeni proleta s 1024 kanalami i s perevodom skhemy na tranzistory. EHtot pribor byl razdelen na dve absolyutno nezavisimye chasti: analog k tsifrovomu preobrazovatelyu (ATSP), kotoryj izmeryaet vremya proleta, i 1024-kanal'noe nakopitel'noe ustrojstvo na ferritovykh serdechnikakh. Takim putem vykhodnye signaly, postupayushchie iz ATSP, mogut byt' zaregistrirovany na magnitnoj lente vmeste s vykhodnymi signalami iz drugikh ATSP, izmeryayushchikh drugie fizicheskie kolichestva, otnosyashchiesya k tomu zhe yadernomu prevrashcheniyu pri obshchem kolichestve kanalov, prevyshayushchem moshchnost' nakopitel'nogo ustrojstva. Analog tsifrovogo preobrazovatelya snabzhen vremennym zapominayushchim ustrojstvom, kotoroe blagodarya svoemu regulirovaniyu skorosti signalov: 1) pozvolyaet dostich' velichiny mertvogo vremeni lish' 0,5 {mu} v sekundu, kogda analog tsifrovogo preobrazovatelya svyazan neposredstvenno s 1024-kanal'nym nakopitel'nym ustrojstvom; i 2) sposobstvuet luchshemu ispol'zovaniyu samoj magnitnoj lenty, kogda analog tsifrovogo preobrazovatelya privodit v dejstvie magnitofon. Vremennoe zapominayushchee ustrojstvo obladaet sposobnost'yu zapominat' s chetyrekhkratnoj tochnost'yu (vplot' do shestnadtsati dvoichnykh razryadov). SHirina kanala analizatora kolebletsya ot 0,5 do 48 {mu}s. 1024 kanala mogut byt' razdeleny na dve odinakovye gruppy po 512 kanalov, kazhdaya iz kotorykh soedinyaetsya s dvumya detektorami. Vremennoe zapominayushchee ustrojstvo dopuskaet odnovremennuyu zapis' signalov dvumya gruppami. Kanaly mogut byt' takzhe podrazdeleny po vremeni proleta na dve gruppy, iz kotorykh pervaya gruppa (16 kanalov) ispol'zuetsya dlya zapisi chisto nulevogo vremeni proleta, togda kak vtoraya gruppa mozhet byt' ispol'zovana v lyuboj pozitsii po obshchim intervalam vremeni mezhdu proletami. CHislo kanalov, ispol'zuemykh dlya zapisi

  17. Radioisotope Power Sources; Sources d'energie utilisant les radiobotopes; Radioizotopnye istochniki ehnergii; Fuentes radio isotopicas de energia

    Energy Technology Data Exchange (ETDEWEB)

    Culwell, J. P. [USAEC, Washington, D.C (United States)

    1963-11-15

    , obychno ispuskayut al'fa- ili beta-luchi. Al'fa-izluchateli kak toplivo predstavlyayut bol'shuyu tsennost', no oni stoyat doroge i v to zhe vremya menee dostupny, chem beta-izluchateli, poehtomu ikh, kak pravilo, ispol'zuyut dlya kosmicheskikh zadach. Beta-goryuchee, vydelennoe iz otkhodov reaktora, v nastoyashchee vremya primenyaetsya isklyuchitel'no dlya nazemnykh ili morskikh tselej. Odnako sleduet ozhidat', chto takie beta-izluchateli, kak strontsij-90, v kontse kontsov budut primenyat'sya i v kosmose. V nastoyashchee vremya vedutsya issledovatel'skie raboty s generatorami, v kotorykh v kachestve goryuchego budut primenyat' smeshannye produkty deleniya. Ehto goryuchee budet deshevle, chem chistye radioizotopy, poskol'ku sokratyatsya zatraty na razdelenie izotopov i na ikh ochistku. Prototipom termoehlektri- cheskikh generatorov, pitaemykh strontsiem-90 i tseziem-137, yavlyayutsya uzhe funktsionirujte ili razrabatyvaemye generatory na meteorologicheskikh stantsiyakh, v navigatsii i v glubokovodnykh ustrojstvakh obnaruzheniya. Termoehlektricheskim generatorom, rabotayushchim na plutonii-238, osnashchen iskustvennyj sputnik ''Tranzit'', razrabotannyj voennomorskim vedomstvom SSHA. Razrabatyvayutsya generatory dlya ispol'zovaniya v kosmose Upravleniem po natsional'noj aehronavtike i issledovaniyu kosmicheskogo prostranstva. Vysokaya aktivnost' radioizotopnykh istochnikov ehnergii trebuet, chtoby voprosam bezopasnosti bylo udeleno osoboe vnimanie. Sleduet ustanovit' strogij kontrol' za soblyudeniem tekhniki bezopasnosti i provesti ryad shirokikh ispytanij, chtoby udostoverit'sya, chto radioaktivnye sistemy mogut funktsionirovat', ne nanosya ushcherba okruzhayushchim. (author)

  18. Radiation Synthesis of Stannous Dibromodibutyl; Synthese radiochimique de l'etain dibromopibutyle; Radiatsionno-khimicheskij sintez dibromdibutilolova; Sintesis radioquimica del dffiromodibutilestano

    Energy Technology Data Exchange (ETDEWEB)

    Abramova, L. V.; Vereshchinskij, I. V.; Kocheshkov, K. A.; Miretskij, V. Yu.; Pozdneev, V. V.; Ryabukhin, Yu. S.; Sheverdina, N. I.

    1963-11-15

    nerzhaveyushchej stali ob''emom 2-1) byl snabzhen meshalkoj. Ustanovka montirovalas' na istochnike {gamma}-izlucheniya Co{sup 60}. Opyty provodilis' pri temperature 80 {+-} 5{sup o}C i atmosfernom davlenii. Moshchnost' dozy sostavlyala {approx}50 rad/sek (po ferrosul'fatnomu dozimetru). Primenyalos' metallicheskoe poroshkoobraznoe olovo i bromistyj butil raznoj stepeni ochistki. Komponenty reaktsii bralis' v razlichnykh sootnosheniyakh. Ustanovlennoe chto v dannykh usloviyakh protekaet napravlennaya radiatsionnokhimicheskaya reaktsiya, v rezul'tate kotoroj v osnovnom obrazuetsya dibromdibutilolovo s vysokim kolichestvennym vykhodom. Pokazano, chto protsess protekaet s induktsionnym periodom, dlitel'nost' kotorogo zavisit ot chistoty iskhodnogo bromistogo butila. EHtot zhe faktor zametno vliyaet ne skorost' obrazovaniya tselevogo produkta. Najdeno, chto olovo, ne voshedshee v reaktsiyu, mozhet povtorno ispol'zovat'sya dlya polucheniya dibromdibutilolova. Pri ehtom polnost'yu ustranyaetsya induktsionnyj period. Otmechennye osobennosti sozdayut predposylki dlya provedeniya nepreryvnogo protsessa. Predlozhen mekhanizm reaktsij dlya ob{sup y}asneniya zakonomernostej protsessa, protekayushchego so znachitel'nym radiatsionno-khimicheskim vykhodom. (author)

  19. Physical and Chemical Analysis of the Germinating and Nutritional Properties of Irradiated Wheat; Analyse Physico-Chimique des Caracteristiques Germinatives et Nutritives du Ble Irradie; Fizicheskie i khimicheskie analizy svojstv rosta i pitatel'nykh kachestv obluchennoj pshenitsy; Analisis Fisicoquimico de Trigo Irradiado: Estudio de sus Caracteristicas Germinativas y Nutricionales

    Energy Technology Data Exchange (ETDEWEB)

    Pahissa Campa, J.; Gabarain, R. V.A.; De Pahissa, M. H.H. [Comision Nacional de Energia Atomica (Argentina); Bassa, L. [Junta Nacional de Granos, Buenos Aires (Argentina)

    1966-11-15

    raskatyvanija testa, soprotivlenie raskatyvaniju, raskatyvanie, otnoshenie soprotivlenija raskatyvaniju k raskatyvaniju), harakteristiki, kasajushhiesja vypechki hleba (ves, ob{sup e}m i udel'nyj ob{sup e}m hleba). Te zhe samye velichiny byli opredeleny takzhe dlja neobluchennoj pshenicy. Dostatochnoe kolichestvo pshenicy bylo oblucheno s tem, chtoby mozhno bylo osushhestvit' analizy obrazcov po istechenii razlichnyh periodov vremeni. Byli najdeny analiticheskie velichiny, menjajushhiesja s dozoj, otmecheny razlichija (s uchetom kontrol'nogo obrazca), registriruemye v teksture, aromate, cvete i vkuse hleba, izgotovlennogo iz pshenicy, obluchennoj samymi bol'shimi dozami. Dlja opredelenija izmenenij v pitatel'nyh svojstvah obluchennaja pshenica byla vkljuchena v racion krys kak neposredstvenno posle obluchenija, tak i spustja nekotoroe vremja. Posle jetogo byli provedeny tshhatel'nye nabljudenija za razvitiem krys, v chastnosti za razvitiem ih kartiny krovi i kostnogo mozga. (author)

  20. Special Nuclear Material Control by the Power Reactor Operator; Controle des Matieres Nucleaires Speciales par l'Exploitant d'une Centrale Nucleaire; Spetsial'nyj kontrol' nalichiya yadernykh materialov operatorom ehnergeticheskogo reaktora; Control de Materiales Nucleares Especiales por Parte de Quienes Operan el Reactor de Potencia

    Energy Technology Data Exchange (ETDEWEB)

    Cordin, R. A. [Yankee Atomic Electric Company, Boston, MA (United States)

    1966-02-15

    debido a un control deficiente de los combustibles nucleares y a la falta de precision en las operaciones contables. La administracion de materiales nucleares requiere que los explotadores de los reactores de potencia lleven una contabilidad completa y detallada. No es necesario que los documentos sean complejos si lo que se pretende es que sean completos y adecuados. En realidad, la sencillez es sobremanera conveniente. A pesar de que el combustible nuclear es un combustible nuevo y totalmente distinto de los de tipo tradicional, no hay que rodear su utilizacion de ninguna aureola de misterio. El control de los materiales nucleares no es una simple labor de inventario, sino que constituye la base de muchas otras operaciones inherentes a la explotacion de los reactores de potencia, por ejemplo: el transporte del combustible irradiado, su regeneracion con la correspondiente contabilizacion del combustible recuperado y del material producido durante el funcionamiento del reactor, y, por ultimo, el establecimiento de un sistema de seguros adecuado. (author) [Russian] Otnositel'no novoe i chrezvychajno cennoe toplivo dlja proizvodstva jelektrojenergii, a imenno uran, trebuet ochen' tshhatel'nogo ucheta s momenta, kogda operator reaktora prinimaet na sebja material'nuju otvetstvennost' za jetot material, i do togo momenta, kogda jetot material v vide chastichno otrabotannogo topliva peredaetsja na druguju ustanovku, gde regeneriruetsja ostavshajasja chast' ego pervonachal'noj cennosti. Bol'shaja chast' operatorov jenergeticheskih reaktorov, do pojavlenija v svet jadernoj jenergetiki, rabotala na jelektrostancijah s obychnym iskopaemym toplivom i /zhe davno vyrabotala dostatochno polnye i nadezhnye formy kontrolja za ego rashodovaniem. Operator reaktora dolzhen raspolagat' ne menee nadezhnymi sposobami ucheta jadernyh materialov, ispol'zuemyh na ego ustanovke. Jekspluatacija jenergeticheskih reaktorov ne imeet bol'shoj istorii, i na protjazhenii otnositel'no korotkogo perioda

  1. A Scintillation Camera for Kinetic Studies of the Distribution of Radioactive Nuclides in the Brain; Chambre a Scintillation pour des Etudes sur la Cinetique de la Repartition des Radionucleides dans le Cerveau; Stsintillyatsionnaya kamera dlya kineticheskogo issledovaniya raspredeleniya radioaktivnykh izotopov v tkani mozga; Camara de Centelleo para Estudiar la Cinetica de la Distribucion de Radionuclidos en el Cerebro

    Energy Technology Data Exchange (ETDEWEB)

    Gross, W. [Radiological Research Laboratory, Department Of Radiology, Columbia University, New York, NY (United States); Schlesinger, E. B.; De Boves, S. [Department of Neurological Surgery, Columbia University, New York, NY (United States)

    1964-10-15

    corresponder a la situacion espacial de los contadores de centelleo. La modulacion de la intensidad del haz del osciloscopio y la supresion de la actividad de fondo facilitan la visualizacion de la distribucion de actividad. (author) [Russian] Razrabotana scintil- ljacionnaja kamera, special'no prednaznachennaja dlja izuchenija kinetiki raspredelenija radioaktivnyh izotopov v tkani mozga. Jetot pribor sostoit iz dvuh grupp, aktivirovannyh talliem kristallov NaJ razmerom 1,8 X 2,5 sm , prichem 63 kristalla kazhdoj gruppy soboany v porjadok 7 x 9 na 2 ,5 -sm centrah. Jeti gruppy m ogut byt' raspolozheny takim o'razom, chtoby odnovremenno poluchat' ob e bokovye proekcii ili odnu bokovuju i odnu za dne-perednjuju ili peredne-zadnjuju proekciju. Pole zrenija kazhdogo kristalla ogranicheno kollimatorom, so stojashhim iz 19 suzhivajushhihsja kanalov s parallel'nymi osjam i. Jeta konstrukcija imeet chuvstvitel'nost' pochti ravnuju polnoj shirote na polovine rasstojanija douslovnogo istochnika opuholi po vsem rasstojanijam do 10 cm ot perednej chasti kollimatora. Jeta chuvstvitel'nost' dostatochno shiroka, chtoby izbezhat' neradioaktivnyh zon , i v to zhe vremja dostatochno uzka , chtoby pozvolit' tochnoe nabljudenie raspredelenija aktivnosti v techenie neskol'kih minut, pri ispol'zovanii normal'nyh indikatornyh doz j o d a -131. Kazhdyj kristall opticheski s o edinen so svoim fotoumnozhitelem v obshhej upakovke. Vyhodnye impul'sy fotoumnozhitelej analizirujutsja s pomoshh'ju diskriminatorov i informacija hranitsja v cifrovoj forme v chetverti zapominajushhego ustrojstva 512-kanal'nogo analizatora vysokih impul'sov. Sovpadajushhie po vremeni impul'sy iz razlichnyh d e tektorov mogut prinimat'sja v jetoj ust anovke s neznachitel'nymi p ot er jam i . Schityvanie dannyh vozmozhno v neskol'kih formah. Mozhno poluchit' dannye v cifrovoj forme, v mashinopisnoj forme ili v vide perfokart. Poslednie mozhno vvesti obratno v pribor dlja povtornogo izuchenija. Analogichnoe schityvanie

  2. EURATOM's Programme of Participation in Power Reactor Construction; Le programme de participation d'Euratom aux reacteurs de puissance; Programma uchastiya v razrabotke ehnergeticheskikh reaktorov Evratoma; El programa de participacion de la Euratom en la construccion y explotacion de reactores de potencia

    Energy Technology Data Exchange (ETDEWEB)

    Ramadier, R. C.; Parker, E. [Communaute Europoenne de l' Energie Atomique, Bruxelles (Belgium)

    1963-10-15

    razrabotke dvukh ehnergeticheskikh reaktorov. Ehti zaprosy byli predstavleny sootvetstvenno Ob''edineniem Rheinisch-Westffllischee Elektrizitfltswerk - Bayernwerke (RWE-BW) N.V. Samenwerkende Electriciteits -Productiebedriyve. Pervyj zapros kasaetsya kipyashchego reaktora s dvojnym tsiklom moshchnost'yu v 237 mgvt ehl), vtoroj - kipyashchego reaktora s pryamym tsiklom i estestvennoj tsirkulyatsiej moshchnost'yu v 50 mgvt (ehl). Sovmestnoe uchastie mozhet prinimat' razlichnye formy. Ono mozhet, v chastnosti, vylit'sya v uchastie pri pokrytii veroyatnogo defitsita pri proizvodstve ehlektroehnergii na ehlektrostantsiyakh v techenie pervykh let ikh ehkspluatatsii. Takoe uchastie Evratoma imelo tsel'yu pooshchrit' stroitel'stvo nekotorykh iz ehtikh atomnykh ehlektrostantsij. K tomu zhe ono pozvolit i v dal'nejshem poluchat' chrezvychajno poleznuyu informatsiyu v posleduyushchie gody, kogda problemy predstoyashchej deyatel'nosti v oblasti razvitiya atomnoj ehnergii vstanut so vsej ochevidnost'yu. (author)

  3. Comparison of Clinical and Laboratory Responses in Sheep and Dogs following Whole-Body Exposures to 250-Kvp X-Rays and Fission-Spectrum Neutrons; Etude Comparee Clinique et en Laboratoire, des Reactions de Moutons et de Chiens a la Suite d'une Exposition du Corps Entier a des Rayons X de 250 Kv-Crete et a des Neutrons de Fission; Sravnenie klinicheskikh i laboratornykh dannykh o reaktsii ovets i sobak na obluchenie vsego tela rentgenovskimi luchami pri pikovom napryazhenii 250 Kv i nejtronami spektra deleniya; Estudio Comparado, Clinico y de Laboratorio, de las Reacciones de Ovejas y Perros Consecutivas a la Irradiacion del Cuerpo Entero con Rayos X de 250 KVp y Neutrones de Fision

    Energy Technology Data Exchange (ETDEWEB)

    Quaife, M. A.; Boer, J. de; Jones, R. K.; Ichiki, A. T.; Godden, W. R.; Davis, H.; Engel, R. E. [Kirtland AFB, New Mexico (United States)

    1964-05-15

    parametro de la hematopoyesis con fines diagnosticos. Las alteraciones patologicas mas significativas se circunscribieron a los pulmones, donde se observaron extensas hemorragias perivasculares. Mediante el microscopio se confirmo que la zona hemorragica estaba situada entre el tejido conjuntivo adventicio y los vasos periarteriales. El indice de mortalidad a los 30 dias, en los perros, fue del 50% despues de la exposicion a los neutrones y del 93% despues de la exposicion a los iayos X. En cuanto a las ovejas, los neutrones ocasionaron una mortalidad de 22% y los rayos X, una de 80%. (author) [Russian] Pjatnadcat' ovec i vosem' sobak byli oblucheny dozoj 400 rad (vozdushnaja doza) pul'sirujushhih nejtronov spektra delenija, a takoe zhe kolichestvo ovec i 14 sobak -dozoj 400 rentgen (sredinnaja vozdushnaja doza) rentgenovskih luchej pri pikovom naprjazhenii 250 kv. Sem' ovec i chetyre sobaki byli ostavleny neobluchennymi dlja kontrolja. Kontrol'nye dannye poluchali v techenie dvuh nedel', predshestvovavshih oblucheniju, a takzhe reguljarno i chasto posle n ego . U ovec naibolee opredelennym klinicheskim izmeneniem bylo polnoe vypadenie shersti k 51 dnju posle obluchenija. Obnazhivshajasja kozha byla rozovogo cveta, ochen' napominajushhego slabyj rumjanec. U sobak vypadenija shersti ne bylo. Posle obluchenija u oboih vidov zhivotnyh rezko upalo soderzhanie formennyh jelementov krovi, nejtrofil'nyh lejkocitov, limfocitov i trombocitov. Primerno na 24-j den' posle obluchenija vosstanovlenie kolichestva lejkocitov bylo otmecheno to l'ko u zhivotnyh, podvergshihsja oblucheniju nejtronami. Urovni trombocitov snizilis' do bezopasno go urovnja u oboih vidov zhivotnyh, no u sobak jeto proizoshlo neskol'ko ran'she. Vosstanovlenie nastupilo na tret'ej nedele posle obluchenija u oboih vidov zhivotnyh, podvergshihsja oblucheniju nejtronami, no ne proizoshlo u zhivotnyh, obluchennyh rentgenovskimi luchami. Issledovanija gematokrita pokazali znachitel'noe sokrashhenie gemoglobina u oboih

  4. Nuclear Calculations of Light-Water Moderated Reactors and Experimental Correlations; Calculs de Riacteurs Ralentis a l'Eau Ordinaire et Comparaison avec les Risultats Expirimentaux; Raschet reaktorov s zamedlitelem iz obychnoj vody i sravnenie s ehksperimental'nymi rezul'tatami; Calculos Nucleares de Reactores Moderados por Agua Ligera y Correlacion Experimental

    Energy Technology Data Exchange (ETDEWEB)

    Solanilla, R. [Comision Nacional de Energia Atomica, Buenos Aires (Argentina)

    1964-02-15

    efecto 'Daneoff' . La La correlacion con los resultados experimentales disponibles, que comprenden un vasto campo de moderacion, composicion de materiales y geometria, realizada, a traves de la comparacion con algunos de los. principales parametros de un reticulado y/o de la multiplication efectiva, muestra resultados satisfactorios, consiguiendose dispersiones entre reactividad calculada y experimental que en general no superan el 2%. (author) [Russian] S pomoshh'ju teorii dvuh grupp, izmenennoj s uchetom nadteplovyh delenij, byla proanalizirovana serija kriticheskih sborok s otrazha- telem i zamedlitelem iz obychnoj vody. Otlichie sostojalo v stepeni obogashhenija uranom-235. Jeffektivnye sechenija teplovoj gruppy te zhe, chto i v tablicah Amstera dlja vodorodnyh smesej pri razlichnyh temperaturah, a takzhe dlja razlichnyh koncentracij urana-235 i poglo- titelej v 1/v. Vozdejstvie geterogennosti jeffektivnyh sechenij bylo opredeleno pribli- zitel'no putem izmenenija koncentracii poglotitelja s pomoshh'ju prostranstvennyh otklonenij teplovogo potoka v kamere. S primeneniem formuly Amuajjalja-Benoista byl rasschitan kojefficient proigrysha. Po sushhestvu kojefficient termodiffuzii vtroe men'she makrosko- picheskogo jeffektivnogo sechenija perenosa, kotoryj byl gomogenizirovan po vsej kamere. V sootvetstvii s sistemoj Ombrellaro byli rasschitany parametry gruppy bystryh chastic po trem diffuzionnym gruppam bystryh chastic (ot 10 do 0,821 Mjev; ot 0,821 Mjev do 5,5 kjev; ot 5,5 kjev do 0,625 jev) vmeste s mikroskopicheskimi jeffektivnymi sechenijami, prime- nimymi dlja kazhdoj gruppy. Opredelenie, kotoroe dajot Ombrellaro dlja nejtronnyh para- metrov treh grupp bystryh chastic v zavisimosti ot ustanovlennyh jeffektivnyh sechenij, bylo izmeneno dlja tret'ej gruppy v sootvetstvii s rezul'tatami obrabotki jeffektivnogo rezonansnogo pogloshhenija urana-238. Jeto predlozhennoe Nikom opredelenie bylo osnovano na raschete jeffektivnogo rezonansnogo integrala. Jeffektivnyj

  5. The adsorption of hydrogen on a molecular sieve at -196{sup o}C and the observation of an isotope effect; Adsorption d'hydrogene sur un tamis moleculaire a -196{sup o}C et observation d'un effet isotopique; Absorbtsiya vodoroda na molekulyarnom fil'tre pri -196{sup o} i nablyudenie rezul'tatov dejstviya izotopov; Adsorcion de hidrogeno en un tamiz molecular a -196{sup o}C y observacion de un efecto isotopico

    Energy Technology Data Exchange (ETDEWEB)

    Duncombe, W G [Wellcome Research Laboratories, Beckenham, Kent (United Kingdom)

    1962-03-15

    adsorbio en el tamiz molecular cerca del 99 % del hidrogeno inicial antes de comenzar la desorcion por bombeo. Por lo tanto, parece probable que el considerable fraccionamiento observado tenga lugar principalmente durante la desorcion y que el efecto carezca de importancia cuando el tamiz se emplea para manipular pequenos volumenes de isotopos del hidrogeno ya que, por lo general, la desorcion total se efectuara por calentamiento. (author) [Russian] Ispytyvalsya molekulyarnyj fil'tr Linde 4 A v kachestve vozmozhnogo sredstva obrashcheniya s nebol'shimi ob{sup e}mami izotopov vodoroda v vakuume, vmesto primenyayushchegosya v nastoyashchee vremya nasosa Toiplera. Davlenie ravnovesiya (P) izmeryaetsya razlichnymi ob{sup e}mami (V) vodoroda, absorbiruemogo odnim grammom fil'tra pri temperature -196{sup o}. EHksperimenty s aktivirovannym drevesnym uglem pokazyvayut preimushchestvo fil'tra kak absorbenta vodoroda. Odin gramm fil'tra v sisteme s ob{sup e}mom v 500 ml absorbiruet okolo 97 % odnogo ml obraztsa vodoroda. Absorbtsiya neznachitel'na pri temperature -78{sup o}, i desorbtsiya yavlyaetsya kolichestvennoj i b'kpro protekaet pri komnatnoj temperature. Vozmozhnost' rezul'tatov dejstviya izotopa izuchalas' putem absorbirovaniya izmeryaemykh ob{sup e}mov tritiya (5 millikyuri/mol') pri ravnomernom davlenii okolo 5 mm, pri ehtom proiskhodilo vykachivanie sistemy v periode do 15 minut i izmerenie ob{sup e}ma ostatochnogo vodoroda. Poslednij prevrashchalsya kolichestvenno v vodu, zatem v butan i gaz. Udel'naya aktivnost' byla vsegda vyshe, chem aktivnost' tritiya, kotoryj prokhodil 10 tsiklov absorbtsii i desorbtsii bez promezhutochnogo vykachivaniya s tem, chtoby ne bylo nikakikh chistykh poter' gaza. EHto imelo takuyu zhe udel'nuyu aktivnost', kak u neobrabotannogo tritiya, vzyatogo iz rezervnoj kolby. Bylo obnaruzheno, chto logarifm (ostatochnyj ob{sup e}m/nachal'nyj ob{sup e}m) proportsionalen 1/logarifm (ostatochnaya udel'naya aktivnost'/ nachal'naya udel'naya aktivnost') v

  6. Effects of Ionizing Radiation on Insects and Other Arthropods; Effet des rayonnements ionisants sur les insectes et autres arthropodes; Vozdejstvie ioniziruntsej radiatsii na nasekomykh i drugikh chlenistonogikh; Efectos de las radiaciones ionizantes sobre los insectos y otros artropodos

    Energy Technology Data Exchange (ETDEWEB)

    Stone, William E. [United States Department of Agriculture Laboratories, Mexico City, D.F (Mexico)

    1963-09-15

    razvedeniya nasekomykh v massovykh kolichestva. S drugoj storony, nekotorye vidy nasekomykh yavlyayutsya nastol'ko mnogochislennymi, chto primenenie ehtogo metoda mozhet okazat'sya neosushchestvimym bez predvaritel'noj obrabotki zarazhennogo rajona drugimi sredstvami istrebleniya dlya privlecheniya na dostupnoe rasstoyanie populyatsij nasekomykh. Nesmotrya na ehti zatrudneniya, pri blagopriyatnykh obstoyatel'stvakh vryad li kakie-libo drugie metody istrebleniya vrednykh nasekomykh predstavlyayutsya stol' zhe perspektivnymi. Metod sterilizatsii pri pomoshchi radiatsii mozhet sluzhit' sposobom otdaleniya invazii do okonchaniya sbora urozhaya. V doklade soobshchaetsya o vozdejstvii gamma-izlucheniya na potentsial razmnozheniya, polovuyu agressivnost', silu i zhivuchest' vostochnoj plodovoj mukhi Rasiv dorsalis (Hendel), dynnoj mukhi Dacus cucurbltae (Coq.), sredizemnomorskoj plodovoj mukhi Ceratltla capitata (Wied.), meksikanskoj plodovoj mukhi Anastrepha ludens (Loew) i malyarijnogo komara Anopheles quadrlmaculatus (Say); v doklade privodyatsya takzhe rezul'taty prakticheskikh ispytanij vypuske sterilizovannykh samtsov na opytnoe pole dlya istrebleniya populyatsij. Daetsya opisanie dal'nejshego khoda kampanii po istrebleniyu bych'ego ovoda Cochliomyla homlnlvorax (Cqrl.) v Soedinennykh Shtatakh Ameriki i izucheniya razvedeniya sil'nykh, geneticheski markirovannykh osobej, kotorye pozvolyat legko vyyavlyat' vypushchennykh na votgyu sterilizovannykh ovodov. Obsuzhdayutsya takzhe rezul'taty issledovanij po oblucheniyu 6 dopolnitel'nykh vidov vreditelej, porazhayushchikh frukty, ovoshchi, polevye i lesnye kul'tury, 3 vidov, porazhaptsikh skot, i 3 vidov, napadayushchikh glavnym obrazom na cheloveka, a takzhe vozdejstvie oblucheniya ka skorpionov Centruroides limpidus (Karsch), odnozvezdchatogo kleshcha AshYuovdaa americanum (L.); dalee obsuzhdaetsya vozmozhnost' ispol'zovaniya ioniziruitsego izlucheniya v kachestve vozmozhnogo garantijnogo sredstva dlya dezinfestatsii ovoshchej i

  7. Limitations of Ir{sup 192} as a Radiographic Source for the Control of Reactor Pressure-Vessels; Limitations de {sup 192}Ir en Tant que Source pour l'Examen Radiographique des Caissons Etanches de Reacteurs; Nedostatki Iridiya-192 v kachestveradiograficheskogo istochnika dlya kontrolya za korpusami reaktorov vysokogodavleniya; Limitaciones del {sup 192}Ir como Fuente Radiografica en el Control de Recipientes de Presion para Reactores

    Energy Technology Data Exchange (ETDEWEB)

    Horvat, D. [Nuclear Institute ' ' J. Stefan' ' Ljubljana, Yugoslavia (Slovenia)

    1965-09-15

    vidno iz diagramm vesa oborudovanija dlja obluchenija dlja iridija-192 i kobal'ta-60, uchityvaja jekvivalentnye aktivnosti oboih istochnikov v otnoshenii togo zhe samogo vremeni obluchenija. Obsuzhdae.tsja vopros ob jekonomicheskih nedostatkah iridija-192 vvidu ego korotkogo perioda poluraspada, i daetsja gruboe jekonomicheskoe sravnenie jeffektivnosti kobal'ta-60 i iridija-192 pri razlichnyh diapazonah i plotnostjah radiograficheskogo kontrolja. (author)

  8. Tritium and Autoradiography in Cell Biology; Tritium et Autoradiographie en Biologie Cellulaire; 0422 0440 0438 0414 ; El Tritio 0443 la Tecnica Autorradiografica en Citobiologia

    Energy Technology Data Exchange (ETDEWEB)

    Taylor, J. H. [Departments of Botany and Zoology, Columbia University, New York, NY (United States)

    1962-02-15

    ' vysohnut'. Posle obluchenija jemul'sija projavljaetsja eshhe v kontakte s biologicheskim obrazcom. Preparat - radioavtogramma - pri rassmotrenii cherez svetovoj mikroskop pokazyvaet kletochnye struktury i raspredelenie izotopov s razreshajushhej sposobnost'ju menee odnogo mikrona. Takim obrazom udalos' prosledit' cherez dva-tri delenija kletki raspredelenie mechennoj tritiem dezoksiribonuklei- novoj kisloty (DNK) otdel'nyh hromosom. Jeti issledovanija okazalis' vozmozh- nymi v rezul'tate podgotovki tritirovannogo timidina, kotoryj jaljaetsja ves'- ma podhodjashhim metjashhim veshhestvom dlja DNK i bystro istoshhaetsja pri udalenii kletki iz sredy, soderzhashhej mechenyj timidin. Jetot metod dal informaciju o mehanizme vosstanovlenija DNK, strukture i razmnozhenii hromosom, kinetike delenija kletki i sovsem nedavno o sheme i po- sledovatel'nosti vo vremeni razmnozhenija razlichnyh hromosom v odnom i tom zhe jadre i razlichnyh chastjah odnoj hromosomy. Vse izuchennye do sih por hromo- somy imejut dva funkcional'nyh podkomponenta DNK, kotorye rasprostranja- jutsja polukonservativnym obrazom vo vremja razmnozhenija. Jeti dva podkompo- nenta razlichny v opredelennom strukturnom smysle, chto ogranichivaet takoj tip obmena, kotoryj mozhet proishodit' mezhdu chetyr'mja podkomponentami razmno zhajushhejsja hromosomy. Sovremennye dannye o posledovatel'nosti vedut k gipoteze o tom, chto hromosomy razmnozhajutsja v gineticheski kontroliruemoj posledo- vatel'nosti. Vedutsja poiski novyh dannyh po shemam i mehanizmu kontrolja posledovatel'nosti vmeste s prochimi svjazannymi s jetim processami, kotorye zatragivajut sintez hromosomnyh proteinov i drugoj klass nukleinovyh kislot - ribonukleinovye kisloty. (author)

  9. Accounting Systems for Heavy Water and Fissionable Materials; Comptabilite de l'Eau Lourde et des Matieres Fissiles; Sistema ucheta tyazheloj vody i delyashchikhsya materialov; Sistemas de Contabilidad para el Agua Pesada y los Materiales Fisionables

    Energy Technology Data Exchange (ETDEWEB)

    Fletcher, G. W.; Reid, H. B.; Jenkinson, W. G. [Atomic Energy of Canada Ltd., Chalk River, ON (Canada)

    1966-02-15

    otvetstvennost' za podgotovku dannyh o materialah, nahodjashhihsja v ih vedenii. V doklade opisyvajutsja osnovnye procedury vedenija zapisej, ohvatyvajushhie peredvizhenie materialov mezhdu sekcijami, izmenenie form materialov, registraciju uvelichenija kolichestva i poter', a takzhe udalenie othodov. Opisyvaetsja takzhe procedura perenesenija jetih dannyh na perfokarty, okonchatel'noj obrabotki jetih dannyh s pomoshh'ju vychislitel'noj mashiny IBM 1401 i podgotovki otchetnosti. Opisyvaetsja sistema ucheta tjazheloj vody, osnovannaja na teh zhe principah, kotorye ispol'zujutsja primenitel'no k uchetu deljashhihsja materialov. V jetom sluchae v kontrol'nom dos'e ukazyvaetsja kolichestvo (v funtah) DaO, vydeljaemoe dlja kazhdoj iz 15 sekcij. Opisyvajutsja osnovnye metody vedenija zapisej i ispol'zovanija vychislitel'nyh sistem. (author)

  10. A New Technique for Determining the Distribution of Radium and Thorium in Living Persons; Determination de la Repartition du Radium et du Thorium chez les Personnes Vivantes: Une Methode Nouvelle; Novyj metod opredeleniya raspredeleniya radiya i toriya u patsientov; Nueva Tecnica para Determinar la Distribucion del Radio y del Torio en Pacientes

    Energy Technology Data Exchange (ETDEWEB)

    Miller, C. E. [Argonne National Laboratory, Health Division, Argonne, IL (United States)

    1964-10-15

    pacienta. Jeta vytjanutaja forma kristalla byla primenena vmesto obychnogo vertikal'no raspolozhennogo korotkogo cilindra dlja togo,-chtoby ploshhad' poverhnosti i poperechnoe sechenie kristalla imeli odinakovuju formu po otnosheniju k ljuboj tochke tela. Spektry gamma-luchej, ishodjashhih ot pozvonochnika pacienta i ot radioaktivnyh istochnikov v centre fantoma iz pressovannoj drevesiny, byli polucheny pri pomoshhi kristalla, pomeshhaemogo v h-chisle polozhenij s odinakovymi intervalami vdol' krovati. Skorosti scheta, poluchennye dlja otobrannyh fotopikov iz spektrov pacienta i fantoma, byli vvedeny v jelektronnoschetnoe ustrojstvo, zaprogrammirovannoe dlja podscheta serii tochechnyh istochnikov, chto daet tot zhe samyj profil' gamma-luchej. Rezul'taty, poluchennye pri issledovanii rjada pacientov, svidetel'stvujut o tom. chto hotja raspredelenie chashhe vsego v osnovnom odnorodno, u nekotoryh lic koncentracija v dva ili tri raza vyshe srednej v nogah, tazu ili v cherepe. Itogi vychislennyh istochnikov sootvetstvujut v predelah'neskol'kih procentov obshhemu soderzhaniju radija v organizme, podschitannomu na osnovanii drugih metodik izmerenija aktivnosti vsego organizma. Izmerenija, provedennye u dvuh pacientov, poluchavshih torotrast bolee devjatnadcati let nazad, i na fantomah, soderzhashhih torotrast i radij-torij, takzhe svidetel'stvovali o vozmozhnosti izmerenija neodnorodnogo raspredelenija Tl{sup 208} (ThC''), Ac{sup 228}(MsTh{sup 2}) i, vozmozhno, Pb{sup 212} vdol' osi tela. (author)

  11. Mass and Charge Distribution in Low-Energy Fission; Repartition des Masses et des Charges dans la Fission a Basse energie; 0420 0410 0421 041f 0420 0415 0414 0415 041b 0415 041d 0418 0415 041c 0410 0421 0421 042b 0418 0417 0410 0420 042f 0414 0410 041f 0420 0418 0414 0415 041b 0415 041d 0418 0418 , 0412 042b 0417 0412 0410 041d 041d 041e 041c 0427 0410 0421 0422 0418 0426 0410 041c 0418 041c 0410 041b 041e 0419 042d 041d 0415 0420 0413 0418 0418 ; Distribucion de Masas y de Cargas en la Fision a Bajas Energias

    Energy Technology Data Exchange (ETDEWEB)

    Wahl, A. C. [Washington University, St. Louis, MO (United States)

    1965-07-15

    fragmentos de fision. Aunque muchos de los rendimientos calculados para los fragmentos primarios encierran considerables incertidumbres, debido principalmente a la falta de conocimientos sobre la distribucion de las cargas, en particular en el caso de productos de fision formados con un bajo rendimiento, el autor presenta algunos calculos de los rendimientos- primarios para destacar la necesidad de proseguir la labor de experimentacion y la posibilidad de hacerlo. Entre los procesos de fision que examina, ademas de la fision del {sup 235}U inducida por neutrones termicos, figuran los siguientes: fision del {sup 233}U y del {sup 239}Pu inducida por neutrones termicos, fision espontanea del {sup 240}Pu y del {sup 252}Cf, fision del {sup 235}U y del {sup 238}U inducida por neutrones de 14 MeV, fision del {sup 226}Ra inducida por protones de 11 MeV, y fision del {sup 209}Bi por deuterones de 22 MeV. (author) [Russian] Raspredelenija massy i zarjada pri delenii urana-235, vyzvannom teplovymi nejtronami dostatochno podrobno obsuzhdajutsja i sravnivajutsja zatem s sootvetstvujushhimi raspredelenijami pri drugih processah delenija, vyzvannogo chasticami nizkoj jenergii. V sostav voprosov, podlezhashhih obsuzhdeniju v svjazi s raspredelenijami mass pri delenii na dve chasti, vkljuchajutsja voprosy otnositel'no raspolozhenija pikov, vpadiny i tonkoj struktury krivoj vyhoda massy v otnoshenii zapolnennyh jadernyh obolochek i izmenenij v raspolozhenii, chto sluchaetsja pri izmenenii deljashhegosja jadra i jenergii vozbuzhdenija. Obsuzhdaetsja takzhe raspredelenie mass pri delenii jadra na tri chasti. Kak pri dvojnom, tak i pri trojnom delenii sdelany zamechanija otnositel'no raspredelenija mass pervichnyh oskolkov (do nejtronnoj jemissii) i produktov delenija (posle nejtronnoj jemissii). Raspredelenie zarjada obsuzhdaetsja v ramkah dispersii zarjada sredi produktov delenija s tem zhe massovym chislom i izmeneniem v massovom chisle Zp, ''naibolee verojatnyj zarjad'' (neintegral

  12. Controllable Pulse Frequency and Width System for Pulsing and Modulating Fast-Neutron Core Assemblies; Systeme a Frequence et Largeur d'Impulsions Ajustables Permettant la Pulsation et la Modulation de Milieux Multipliants Sous-Critiques a Neutrons Rapides; Sistema reguliruemykh chastoty i shiriny impul'sa, dayushaya impul's i modulyatsiyu razmnozhayushchikh sred na bystrykh nejtronakh; Sistema de Frecuencia y Amplitud de Impulso Ajustables, para Pulsar y Modular

    Energy Technology Data Exchange (ETDEWEB)

    Duquesne, M.; Lyon, F.; Schmitt, A. [Association Euratom-CEA-SECNR (France); Nucleaires de Cadarache, Centre d' Etudes [France; Gerbier, R. [Laboratoire des Accelerateurs - CEN de Grenoble (France); Nucleaires de Cadarache, Centre d' Etudes [France

    1965-10-15

    diafragmy. Na pervuju plastinku napravljaetsja ochen' shirokij impul's naprjazhenija, kotoryj snimaet pole, i jeto delaetsja dlja togo, chtoby bystro napravit' puchok na mishen', generirujushhuju nejtrony (nachalo impul'sa). Zatem vtoraja plastinka poluchaet impul's togo zhe tipa, kotoryj vosstanavlivaet pole i snimaet puchok s misheni (konej impul'sa). Front narastanija impul'sov porjadka 10 nanosekund; vremja ischeznovenija s misheni nizhe jetogo poslednego znachenija. Prodolzhitel'nost' impul'sa mozhet svobodno regulirovat'sja v razumnyh predelah sootvetstvujushhej zaderzhkoj vtorogo impul'sa po otnosheniju k pervomu. V opredelennyh sluchajah vremja proleta ionov v plastinkah imeet opredelennoe znachenie po otnosheniju k postepennoj prodolzhitel'nosti, kotoraja k jetomu vremeni primenjaetsja. Dalee odnu iz plastinok zamenjajut uvelichivajushhejsja liniej, k kotoroj posledovatel'no primenjajutsja dva impul'sa. 'Impul's naprjazhenija soprovozhdaet, takim obrazom, sgustok dejtonov, kotoryj daet impul's. Stupenchatye generatory naprjazhenija v pervyh stupenjah imejut tranzistory. Vyhodnymi lampami javljajutsja jelektronnye lampy s diskovymi vyvodami, kotorye dajut vozmozhnost' poluchat' seriju 1500 vol't v techenie neskol'kih nanosekund. My ispol'zuem dvojnye tetrody po 50 mgc dlja impul'sov, prednaznachennyh dlja linii zaderzhki. V sisteme obnaruzhenija primenjaetsja scintilljacionno-fotoumnozhajushhee ustrojstvo, cep' kotorogo sostoit iz shemy sovpadenij-antisovpadenij, vremennogo analizatora i cifrovogo samopisia informacii. (author)

  13. Recent Advances in Food Irradiation Research in Japan; Recents Progres de l'Irradiation des Produits Alimentaires au Japon; Poslednie dostizheniya v issledovaniyakh po oblucheniyu produktov pitaniya v Yaponii; Progresos Recientes de las Investigaciones Sobre Irradiacion de Alimentos Realizadas en el Japon

    Energy Technology Data Exchange (ETDEWEB)

    Matsuyama, A. [Laboratory of Radiation Biology, Institute of Physical and Chemical Research, Honkomagome, Bunkyo-Ku, Tokyo (Japan)

    1966-11-15

    'noj programmy po oblucheniju produktov pitanija v oblasti kak fundamental'nyh, tak i prakticheskih problem. V nastojashhee vremja Komissija po atomnoj jenergii predprinimaet usilija po razrabotke programmy issledovanij metodov i ih prakticheskogo primenenija, kotoraja, verojatno, nachnet osushhestvljat'sja v 1967 godu. Sotrudnichestvo issledovatelej v jetoj oblasti privelo k sozdaniju Japonskoj issledovatel'skoj associacii po oblucheniju produktov pitanija, i jeta organizacija, kak ozhidaetsja, budet igrat' vazhnuju rol' v razrabotke nacional'noj programmy. V nastojashhee vremja v Japonii imeetsja okolo 30 radioizotopnyh istochnikov porjadka kilokjuri i pochti takoe zhe chislo generatorov jelektronov, vkljuchaja neskol'ko krupnyh obluchajushhih ustanovok. Prakticheskie issledovanija po oblucheniju produktov v Japonii razdeljajutsja na tri kategorii v zavisimosti ot ih celi. Pervaja - jeto predohranenie produktov pitanija ot.porchi s pomoshh'ju obluchenija; jetim issledovanijam udeljaetsja glavnoe vnimanie. Zaderzhka prorastanija kartofelja, luka i batata, obezzarazhivanija risa, pshenicy i izdelij iz nih i obrabotka nebol'shimi dozami germeticheski upakovannoj ryby i vodnyh zhivotnyh, imejushhih pancir', pri velichine dozy menee 0,5 Mrad i nekotoryh fruktov, takih kak klubnika i apel'siny, - jeto primery potencial'nogo primenenija obluchenija. Interesnoe nabljudenie pri obluchenii risa sostojalo v tom, chto pri obezzarazhivajushhej doze v 5 000- 20 000 rad kachestvennye izmenenija, obnaruzhimye neposredstvenno posle obluchenija, stali posle vos'mimesjachnogo hranenija neznachitel'nymi pri statisticheskom analize organolepticheskih dannyh. Vtoraja kategorija - jeto issledovanija po ocenke vrednyh biologicheskih i biohimicheskih faktorov v produktah pitanija s tochki zrenija zdravoohranenija. Chuvstvitel'nost' k oblucheniju, proizvedennogo Cl. botulinum tipa E, issledovalas' v svjazi s celostnost'ju obluchennyh produktov pitanija. Tret'ja kategorija svjazana s ispol

  14. Thermodynamic Properties of Alloys of Iron and Silicon; Proprietes Thermodynamiques des Alliages Fer-Silicium; Termodinamicheskie svojstva splavov zheleza s kremniem; Propiedades Termodinamicas de las Aleaciones de Hierro y Silicio

    Energy Technology Data Exchange (ETDEWEB)

    Vecher, R. A.; Gejderih, V. A.; Gerasimov, Ja. I. [Moskovskij Gosudarstvennyj Universitet Im.M.V. Lomonosova, Moskva, SSSR (Russian Federation)

    1966-01-15

    siliciuros; en efecto, el enlace metalico se transforma en covalente al aumentar el contenido de silicio. A partir de los datos correspondientes a las aleaciones (soluciones de silicio en hierro a) se calculo la actividad del hierro. Se hallo que la transicion {alpha} Rightwards-Harpoon-Over-Leftwards-Harpoon {alpha}' observada anteriormente constituye una verdadera transformacion de fases. La region bifasica es mas ancha que la indicada en el diagrama de equilibrio (basado en los datos publicados). La actividad del hierro en soluciones liquidas, calculada a partir de la actividad del hierro en solucion solida concuerda satisfactoriamente con los datos obtenidos por Chipman. (author) [Russian] Fazovaja dia- gramma Fe-Si slozhna. Pri 1000 Degree-Sign K imejutsja fazy FeSi{sub 2} ({beta}),FeSi i tverdye rastvory kremnija v zheleze {alpha} and {alpha}'. Izmerjalis' JeDS jelektrohimicheskih jacheek: Fe|Fe{sup 2+} , KI + Nal|Fe-Si pr 600-800 Degree-Sign C Splavy gotovili iz osobo chistyh komponentov metodov poroshkovoj metallurgii i dlitel'- no otzhigali. Izucheny desjat' splavov s soderzhaniem kremnija ot 85 do 4%, lezhashhih vo vseh fazovyh poljah razreza diagrammy pri 1000 Degree-Sign K. Vychisleny integral'nye termodinamicheskie velichiny {Delta}G, {Delta}H i {Delta}S dlja obrazovanija silicidov FeSi{sub 2}({beta}), FeSi i Fe{sub 3}Si pri srednej tempera- ture opytnogo intervala (1000 Degree-Sign K), a takzhe (s ispol'zovaniem teploemkostej silicidov, zhe- leza i kremnija) pri 298 Degree-Sign , 1188 Degree-Sign i 1798 Degree-Sign K. Teploty obrazovanija ukazannyh silicidov pri 298 Degree-Sign K (kkal/mol') ravny - 19,4, - 17,6 i - 22,4 sootvetstvenno. Imejushhiesja v literatu- re dannye pozvoljajut vychislit' teplotu obrazovanija FeSi{sub 2,33} ({alpha}-leboita) pri 298 Degree-Sign K, ravnuju - 14,4 kkal/mol'. Vychislennye nami teploty bol'she jeksperimental'nyh velichin Korbera i Ol'sena na 1,5 - Zkkal. Rasschitannye nami teploty smeshenija dlja zhidkih splavov horo- sho

  15. Study of Fluidized-Bed Control Rods; Etude de Barres de Controle Fluidisees; Izuchenie reguliruyushchej sistemy, ispol'zuyushchej suspenziyu pogloshchayushchikh chastits; Estudio Sobre Barras de Control de Lecho Fluidificado

    Energy Technology Data Exchange (ETDEWEB)

    Blair, D. J. [General Nuclear Engineering Corporation, Dunedin, FL (United States); Driscoll, M. J.; Dalton, G. R.; Parkinson, T. F. [Department of Nuclear Engineering, University of Florida, Gainesville, FL (United States)

    1964-06-15

    sistemu trub podobno sistemam upravlenija, razrabatyvaemym dlja reaktorov s suspenziej topliva. Nekotorye iz vozmozhnyh preimushhestv koncepcii SPCh: 1) ustranjaetsja bol'shinstvo vvodov v verhnjuju chast' korpusa i uproshhaetsja process peregruzki topliva; 2) pri vozniknovenij avarii v rezul'tate poteri potoka proishodit avtomaticheskaja bystraja ostanovka reaktora; 3) osevoe raspredelenie moshhnosti mozhet izmenjat'sja v rezul'tate primenenija special'nyh kanalov ili chastic peremennoj velichiny; 4) rezkoe vozrastanie potoka v vodjanom zazore mozhet byt' umen'sheno dlja chastichno izvlechennogo upravljajushhego sterzhnja; 5) mozhno umen'shit' temperaturnyj ''zapas'' reaktivnosti,esli sistema imeet otricatel'nyj temperaturnyj kojefficient; 6) rashody po izgotovleniju znachitel'no nizhe, chem dlja jelektromehanicheskih sistem. Provedena ocenka koncepcii SMCh, v tom chisle bylo osushhestvleno stroitel'stvo pro- totipnyh modelej i proverka gidravlicheskih i jadernyh harakteristik. Izuchalis' dva tipa: propuskajushhie ''sterzhni'' (tolshhina 2 srednih svbbodnyh probega) i otrazhajushhie ''sterzhni'' (tolshhina 4 srednih svobodnyh probega). Dlja oboih tipov mozhno poluchit' priemlimye gidravlicheskie i jadernye harakteristiki. Obosnovana vozmozhnost' upravlenija reaktorami nizkoj moshhnosti s pomoshh'ju propuskajushhih ili otrazhajushhih upravljajushhih ' sterzhnej''. Dalee bylo pokazano, chto SPCh obladajut horoshimi regulirujushhimi svojstvami, kotorye mozhno rasschitat' standartnymi metodami. V sluchae bol'shoj moshhnosti i vysokoj temperatury neobhodima dopolnitel'naja informacija otnositel'no harakteristik materiala chastic. Bol'shoe preimushhestvo SPCh zakljuchaetsja v vozmozhnosti formirovanija osevogo potoka libo putem ispol'zovanija chastic razlichnoj velichiny i pogloshhenija, libo zhe putem.sootvetstvujushhego formirovanija oblasti poperechnogo sechenija SPCh. (author)

  16. In Vivo and Air Dosimetry of Fission-Spectrum Neutrons; Dosimetrie In Vivo et dans l'Air du Spectre des Neutrons de Fission; Dozimetriya v vozdukhe i dozimetriya In Vivo nejtronov spektra deleniya; Dosimetria In Vivo y en el Aire de Neutrones de un Espectro de Fision

    Energy Technology Data Exchange (ETDEWEB)

    Mobley, T. S.; Engel, R. E.; Godden, W. R. [Kirtland Airforce Base, New Mexico (United States); Penikas, V. T. [AFIT, Wright-Patterson Air Force Base, Ohio, with Duty Station at University of Rochester, School of Medicine and Dentistry, Rochester, NY (United States)

    1964-03-15

    rumenotomfa empleada. La dosis neutronica se determina mediante laminas de umbral. Para medir el flujo integrado de neutrones termicos, se utilizaron las laminas de oro y de oro recubierto de cadmio; para el flujo integrado de neutrones rapidos, se recurrio al plutonio-239, al neptunio-237, al uranio-238 y al azufre-32; la dosis gamma se determino con varillas de vidrio radiofotoluminiscentes. Las ovejas fueron sometidas a exposiciones laterales, a una distancia de linea media de 200 o 175 cm del centro del conjunto critico. La dosis neutronica medida en el aire, a 200 cm, fue 161 {+-} 5 ,5 rad; y a 175 cm, fue 242 {+-} 16,6 rad. A las mismas distancias, la dosis gamma fue, respectivamente, 33 {+-} 2,4 y 42 {+-}2,5 r. Las dosis de entrada y salida, asi como la dosis recibida por el aposito interno varian con el ascenso de temperatura, la distancia al reactor, la orientacion de las laminas con respecto a este y el espesor y composicion de los tejidos atenuadores. (author) [Russian] Dlja opredelenija glubinnoj dozy vo vremja obluchenija nejtronami spektra delenija na ovcah razrabotan metod dozimetrii nejtronov in vivo. Dlja issledovanij ispol'zovalas impul'snaja reaktornaja sborka podobnaja sborke Godiva I I Los-Alamosskoj nauchnoj laboratorii. Reak tor rabotal v impul'snom rezhime, proizvodja impul'sy prodolzhitel'nost'ju 50 mksek shirinoj v polovinu vysoty maksimal'nogo impul'sa, prichem temperatura toplivnogo materiala povyshalas' primerno do 100 Degree-Sign S. Podkozhnyj detektor soderzhal kadmij, pokrytyj zolotoj fol'goj, prostuju zolotuju fol'gu i tri stekljannyh termoljuminescentnyh sterzhnevyh dozimetra v stekljannom kontejnere, vylozhennom litiem i svincom. Jeti detektory pomeshhalis' v podkozhnoj tkani po obeim storonam tela dlja obnaruzhenija integrirovannogo potoka teplovyh nejtronov i gamma-dozy, tak kak potoki nejtronov napravljalis' sboku. Detektory dlja brjushnoj polosti byli podgotovleny takim zhe obrazom, kak i dlja podkozhnogo vvedenija, i sostojali iz

  17. The Determination of Components of Radioactive Decay Mixtures by Computer Analysis of Count-Rate Data; Determination des Composants de Melanges Radioactifs en Decroissance par Analyse a l'Ordinateur des Resultats du Comptage; Opredelenie komponentov smesej radioaktivnogo raspada posredstvom analiza dannykh skorostej scheta s pomoshch'yu schetno-reshayushchego ustrojstva; Determinacion de los Componentes de Mezclas Radiactivas por Analisis de los Datos de Recuento Mediante Calculadoras

    Energy Technology Data Exchange (ETDEWEB)

    Airman, W. D.F.; Tyler, S. A.; Dipertand, M. H.; Sedlet, J. [Argonne National Laboratory, Argonne, IL (United States)

    1965-10-15

    izmenjaetsja znachitel'nym obrazom za period vremeni nabljudenija, libo v rezul'tate neposredstvennogo raspada, libo vsledstvie narastanija produktov raspada. Dlja kazhdoj novoj smesi predstavljaetsja vozmozhnym predskazat' sostav vozmozhnyh komponentov na osnovanii takih soobrazhenij, kak proishozhdenie i posledujushhaja jevoljucija smesi, harakter himii otdelenija i metod ili metody scheta. Esli takogo roda soobrazhenija primenjajutsja nadlezhashhim obrazom, to sostav vozmozhnyh komponentov vkljuchit vse dejstvitel'nye komponenty smesi. V takom sluchae mozhno sostavit' nadlezhashhie uravnenija narastanija i raspada i reshit' ih odnovremenno dlja poluchenija kazhdogo komponenta, ili zhe smes' mozhet byt' razlozhena na sostavnye chasti graficheski putem jekstrapoljacii linejnyh otrezkov krivoj obshhego raspada i narastanija. Odnako v sluchae bol'shogo chisla komponentov, esli rech' idet o kompleksnyh shemah raspada, jeti dva metoda libo okazyvajutsja nepriemlemymi, libo ne predstavljaetsja vozmozhnym opredelit' velichiny pogreshnostej, svjazannyh s vychislenijami. Otbor komponentov raspada po metodu naimen'shih kvadratov daet luchshuju ocenku, chem samo po sebe odnovremennoe reshenie uravnenij. Pojetomu na osnovanii metoda naimen'shih kvadratov byla vyrabotana programma po fortranu dlja schetno-reshajushhego ustrojstva (oboznachennaja po kodu {sup K}ORD{sup )}, kotoraja razreshaet sledujushhuju obshhuju problemu: zadajutsja momenty vremeni i otschety za edinicu vremeni dlja proby, vozmozhnye ishodnye radioizo- ' topy i shemy ih raspada, a takzhe vse sootvetstvujushhie konstanty raspada i jeffektivnosti obnaruzhenija; trebuetsja podschitat' kolichestvo kazhdogo ishodnogo izotopa, dejstvitel'no prisutstvujushhego v zaranee opredelennoe nulevoe vremja. V dopolnenie k jetomu programma daet kolichestvo ishodnyh i dochernih produktov v ljuboj moment registracii dannyh. Ispol'zovannaja pervonachal'no dlja bioanalizov i dlja analiza vzjatyh iz okruzhajushhej sredy prob, jeta programma

  18. Injection Experiments in Jutphaas; Injection au Centre de Jutphaas; Ehksperimenty s inzhektsiej v institute fiziki plazmy v yutfaas; Experimentos de Inyeccion en Jutphaas

    Energy Technology Data Exchange (ETDEWEB)

    De Kluiver, H.; Brandt, H. B.; Strijland, W.; Huizenga, W. [Fom-Instituut voor Plasma-Fysica, Runhuizen, Jutphaas (Netherlands)

    1966-04-15

    10 a 20 {mu}s disminuyen al 20% del valor que tenian antes de la interrupcion del haz; a continuacion decrecen mas lentamente, con una constante de tiempo de 50 {mu}s. El sondeo radial del plasma acusaba un aumento considerable de la corriente colectada hacia el centro, con una disminucion simultanea del tiempo de decrecimiento. Las mediciones sugieren que, durante la inyeccion, se acumula una carga espacial positiva en el centro, que va llenando continuamente la region exterior, mas adiabatica, de la cuspide. Despues de interrumpir el haz, el numero de particulas de la region no adiabatica disminuye con rapidez, mientras que las particulas de la region adiabatica desaparecen mas lentamente (50 {mu}s). (author) [Russian] Provodilis' jeksperimenty po inzhekcii parallel'no osi magnitnogo polja antiprobochnoj geometrii v neadiabaticheskom rezhime. Na modeli s jelektronnym puchkom polovina inzhektirovannogo toka vremenno zahvatyvaetsja. Ustanovleno, chto zavisimost' vremeni uderzhanija ot magnitnogo polja soglasuetsja s raschetom traektorij. Pri vneshnih jelektrostaticheskih poljah bylo dostignuto polnoe uderzhanie za iskljucheniem poter', svjazannyh s rassejaniem na ostatochnom gaze. Byli polucheny protonnye puchki v 75 ma pri 17 kv iz ionnogo istochnika s impul'sami dlitel'nost'ju 2 mksek. Pri naprjazhennosti polja 13 kGs v lovushku vhodil polnyj tok v 35 ma, iz kotoryh 15 ma vyhodili cherez protivopolozhnyj konec ee. Kol'cevoj kollektor v shheli lovushki izmerjal poteri. Ustanovleno, chto vremja spada sostavljalo 50 mksek, chto primerno v dva raza prevyshaet nashu luchshuju ocenku vremeni perezarjadki i v desjat' raz - velichinu, poluchennuju iz analiza neabatichnosti orbit. Integrirovanie tokov po kol'cevoj shheli daet poterju v 10-20 ma. Iz jetih dannyh vytekaet srednjaja plotnost' 0,5 x 10{sup 9} ionov/sm{sup 3}. Zond special'noj formy, sobirajushhij tol'ko gorjachie iony, pokazal v obshhem to zhe povedenie toka, chto i obychnye zondy. Pri davlenii H{sub 2} v 10

  19. Radiation Polymerization in the Solid Phase; Polymerisation radiochimique en phase solide; Radiatsionnaya polimerizatsiya v tverdoj faze; Radiopolimerizacion en fase solida

    Energy Technology Data Exchange (ETDEWEB)

    Barkalov, I. M.; Gol' danskij, V. I.; Enikolopov, N. S.; Terekhova, S. F.; Trofimova, G. M.

    1963-11-15

    EHPR pokazalo, chto spetsificheskaya radiatsionnaya reaktsiya v khode oblucheniya igraet sushchestvennuyu rol'. Posle okonchaniya oblucheniya protsessa polimerizatsii akrilonitrila (ot -196{sup o} do -140{sup o}C) i vinilatsetata (ot -196{sup o} do -100{sup o}C) prekrashchaetsya nesmotrya kak na sokhranenie formy i intensivnosti signala EHPR, tak i na bol'shoe vremya zhizni sozdavaemykh oblucheniem ionov. Rezul'taty ehtikh opytov svidetel'stvuyut o vozmozhnoj bol'shoj roli korotkozhivushchikh vozbuzhdennykh sostoyanij v radiatsionnoj tverdofaznoj polimerizatsii ryada monomerov. Takaya polimerizatsiya ''pod puchkom'' proiskhodit prakticheski bez ehnergii aktivatsii - v otlichie ot medlennoj postpolimerizatsii, idushchej s toj zhe ehnergiej aktivatsii, chto i zhidkofaznyj protsess. (author)

  20. The Use of Research Reactors and Short-Lived Isotopes in the Study of Nuclear-Reactor Fuel Materials; Emploi de Reacteurs de Recherche et de Radioisotopes de Courte Periode dans l'Etude des Combustibles pour Reacteurs Nucleaires; ИСПОЛЬЗОВАНИЕ ИССЛЕДОВАТЕЛЬСКИХ РЕАКТОРОВ И КОРОТКОЖИВУЩИХ ИЗОТОПОВ ПРИ ИЗУЧЕНИИ ТОПЛИВНЫХ МАТЕРИАЛОВ ДЛЯ ЯДЕРННХ РЕАКТОРОВ; Empleo de Reactores de Investigacion y de Isotopos de Periodo Corto en el Estudio de Combustibles Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Elleman, T. S.; Townley, C. W.; Sunderman, D. N. [Battelle Memorial Institute, Columbus, OH (United States)

    1963-03-15

    ) adsorbirujutsja v ohlazhdaemyh lovushkah iz drevesnogo uglja, razdeljajutsja jeljuirovaniem na frakcii joda, kriptona i ksenona putem hromatografii ka kolonke i analizirujutsja pri pomoshhi gamma-luchevoj spektrometrii. Vysvobozhdaemye obrazcom neletuchie produkty delenija otlagajutsja na sosednej lovushke iz metallicheskoj fol'gi, kotoraja mozhet byt' vynuta v ljuboj moment obluchenija dlja analiza. Vysvobozhdenie produktov delenija, nabljudaemoe dlja razlichnyh uslovij obluchenija, mozhet libo zaviset' ot koncentracii, libo ne zaviset' ot nee i mozhet pokazyvat' predpochtitel'noe vydelenie opredelennyh jelementov, bystroe vysvobozhdenie produktov delenija pri izmenenii temperatury i vysvobozhdenie gazoobraznyh produktov delenija posle ostanovki reaktora. Ispol'zovanie jetogo tehnologicheskogo metoda daet vozmozhnost' poluchit' osnovnuju informaciju otnositel'no povedenija materialov dlja prototipov topliva bez neobhodimosti ispol'zovanija krupnyh ispytatel'nyh reaktorov ili zhe bez ustrojstva kamer dlja obrashhenija s vysokoaktivnymi obrazcami. (author)

  1. Circulations in the Bay of Bengal and the Arabian Sea with Reference to Safe Disposal of Radioactive Wastes Near the Indian Coasts; Les Circulations dans les Eaux du Golfe du Bengale et de la Mer d'Oman et l'Elimination sans Danger des Dechets Radioactifs pres des Cotes Indiennes; 0426 0418 0420 0414 ; Circulaciones en el Golfo de Bengala e en el Mar Arabico con Relacion a la Evacuacion sin Riesgos de Desechos Radiactivos Frente al Litoral Indio

    Energy Technology Data Exchange (ETDEWEB)

    Rama Sastry, A. A. [Meteorological Office, Poona 5 (India)

    1960-07-01

    dannyh, sobrannyh razlichnymi jekspedicijami v Indijskom okeane, izuchaetsja fizicheskaja okeanografija v rajone k severu ot jekvatora. Kak v Bengal'skom zalive, tak i v Aravijskom more na glubine do 200 metrov imeetsja po krajnej mere tri razlichnyh vodnyh sloja. V vidu ochen' sil'noj rastvoritel'noj sposobnosti vod Bengal'skogo zaliva poverhnostnye vody mogut byt' podrazdeleny eshhe na neskol'ko kategorij. Po gorizontal'nomu raspredeleniju razlichnyh okeanograficheskih parametrov daetsja cirkuljacija vodnyh mass na razlichnyh urovnjah do 150 metrov vdol' indijskogo poberezh'ja ; jeto zhe otnositsja i k vodnym massam do 500 metrov po vertikal'nomu secheniju. Uroven' nepodvizhnyh vod, kak kazhetsja, nahoditsja vyshe 500 metrov i menjaetsja kak po ploshhadi, tak i po vremeni. Smeshenie vod vyvoditsja iz otnoshenija T-S (vremja-ploshhad'). Privodjatsja sezony povyshenija i ponizhenija urovnja vody vdol' poberezh'ja i rassmatrivaemogo rajona. Intensivnost' povyshenija urovnja vody vdol' poberezh'ja bolee vyrazhena i v techenie jetogo perioda proishodit polnoe smeshenie sloev vody na priberezhnoj otmeli. Glubokovodnye massy razdeljajutsja na vody jekvatorial'noj chasti Indijskogo okeana, antarkticheskie promezhutochnye sloi vody sovmestno s vodami Krasnogo morja i na neznachitel'nuju chast' vod central'noj chasti Indijskogo okeana, glubokovodnye massy Indijskogo okeana i antarkticheskie donnye vody. Daetsja raspredelenie jetih vodnyh mass, a takzhe cirkuljacija glubinnyh vodnyh sloev k severu ot jekvatora. Kak kazhetsja, za poslednie 60 let antarkticheskie donnye vody prodvigajutsja dalee k severu ot jekvatora kak v Bengal'skom zalive, tak i v Aravijskom more. V svjazi s jetim nabljudaetsja ponizhenie solenosti kak v Bengal'skom zalive, tak i v Aravijskom more. V zakljuchenie predlagetsja programma dal'nejshih okeanograficheskih issledovanij v svjazi s bezopasnym udaleniem radioaktivnyh othodov, v chastnosti v Aravijskoe more. (author)

  2. Ternary Fission of U{sup 235} by Resonance Neutrons; Fission Ternaire de {sup 235}U par des Neutrons de Resonance; 0422 0420 041e 0419 041d 041e 0415 0414 0415 041b 0415 041d 0418 0415 0423 0420 0410 041d 0410 -235 041d 0410 0420 0415 0417 041e 041d 0410 041d 0421 041d 042b 0425 041d 0415 0419 0422 0420 041e 041d 0410 0425 ; Fision Ternaria del {sup 235}U por Neutrones de Resonancia

    Energy Technology Data Exchange (ETDEWEB)

    Kvitek, I.; Popov, Ju. P.; Rjabov, Ju. V. [Ob' edinennyj Institut Jadernyh Issledovanij, Dubna, SSSR (Russian Federation)

    1965-07-15

    de presion. La capa de {sup 235}U enriquecido, de {approx}2 mg/cm{sup 2} de espesor y de {approx}300 cm{sup 2} de superficie, se coloco sobre una lamina de aluminio de 20 {mu}m de espesor. En el volumen gaseoso situado de un lado de la lamina, se registraron los destellos de los fragmentos de fision, por el otro, los de las particulas ligeras de largo alcance. Para evaluar la actividad de fondo (por ejemplo, la coincidencia de los impulsos de un fragmento con el impulso de un cuanto gamma de fision o de un proton procedente de la reaccion (n, p) en la lamina de aluminio se efectuaron mediciones en las que el volumen en el que se registraban las particulas de largo alcance, se protegio mediante un filtro de aluminio suplementario de 1 mm de espesor. Los resultados del experimento indican que la razon entre las fisiones ternarias y binarias del {sup 235}U no acusa las fuertes variaciones sena ladas por otros autores. En las mediciones no se observo ninguna irregularidad en la razon de las secciones eficaces en el intervalo energetico 0,1 -0,2 eV. En la memoria se discute la posible influencia de la reaccion (n, {alpha}) sobre los resultados experimentales en los que no se ha recurrido a la coincidencia de las particulas de largo alcance con los fragmentos de fision. (author) [Russian] V poslednee vremja pojavilis' raboty, v kotoryh ukazyvalos' na sushhestvennye kolebanija otnoshenija sechenija trojnogo delenija k secheniju dvojnogo delenija urana-235 pri perehode odnogo nejtronnogo rezonansa k drugomu. V to zhe vremja dlja urana-235 i plutonija-239 takih kolebanij obnaruzheno ne bylo. V nastojashhem doklade soobshhaetsja ob issledovanijah trojnogo delenija urana-235 na nejtronah s jenergiej 0,1-30 jev. V otlichie ot drugih rabot po trojnomu deleniju urana-235 akt trojnogo delenija identificirovalsja po sovpadenijam odnogo iz oskolkov delenija s legkoj dlinnoprobezhnoj chasticej. Jeto pozvoljalo otdelit' trojnye delenija ot. vozmozhnogo vklada reakcii (n, {alpha

  3. Interesting Developments in UO{sub 2} Technology; Progres interessants dans la technologie du bioxyde d'uranium; Interesnye usovershenstvovaniya tekhnologii UO{sub 2}; Recientes progresos en la tecnologia del UO{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Robertson, J. A.L. [Atomic Energy of Canada Ltd., Chalk River, Ontario (Canada)

    1963-11-15

    vydelenie iz UO{sub 2} gazov, yavlyayushchikhsya produktami deleniya. V chastnosti, uvelichenie oblucheniya s 10{sup 15} do 10{sup 18} delenij/cm{sup 2} mozhet snizit' ochevidnye skorosti diffuzii dlya ksenona v UO{sub 2} pri posleduyushchikh obzhigakh na koehffitsient 10{sup 3}. Gaz, po-vidimomu, uderzhivaetsya v mel'chajshikh lovushkakh, chast' iz kotorykh sushchestvuet v iskhodnom materiale, a chast' obrazuetsya v rezul'tate radiatsionnogo povrezhdeniya. Tshchatel'nyj analiz pokazal sushchestvovanie medlennoj utechki iz lovushek, chto, veroyatno, ob''yasnyaetsya ogranichennoj rastvorimost'yu ksenona v UO{sub 2}. Vozmozhnost' osushchestvleniya izmerenij v reaktore otkryvaet novuyu fazu eshche bolee vazhnykh ehksperimentov. Oni pokazhut, imeyutsya li kakie-libo potentsial'nye ehkonomicheskie preimushchestva v novykh formakh topliva. V to zhe vremya budut prodolzhat'sya nastojchivye razrabotki spechenoj UO{sub 2} v prostoj geometrii sterzhnya. (author)

  4. Experimental studies of some of the physical features of beryllium-moderated intermediate reactors; Etude experimentale de quelques particularites physiques des reacteurs a neutrons intermediaires, ralentis au beryllium; Ehksperimental'ny e issledovaniya nekotorykh fizicheskikh osobennostej promezhutochnykh reaktorov s berillievym zamedlitelem; Estudios experimentales de algunas caracteristicas fisicas de los reactores intermedios moderados con berilio

    Energy Technology Data Exchange (ETDEWEB)

    Lejpunskij, A I; Kuznetsov, V A; Artyukhov, G Ya; Mogil' ner, A I; Prokhorov, Yu A; Steklovski, V M; Chernov, L A [Akademiya Nauk, Moskva, Union of Soviet Socialist Republics (Russian Federation)

    1962-03-15

    _derivative}Be/{partial_derivative}U{sup 235}{approx_equal}200. Ehtot fakt ob'yasnyaetsya rezkim snizheniem tsennosti nejtronov, pogloshchaemykh uranom. Dlya ehtoj zhe sborki privodyatsya dannye po ehffektivnosti sterzhnej iz razlichnykh pogloshchayushchikh materialov. Privoditsya ehksperimental'n o izmerennyj khod plotnosti nejtronov razlichnykh ehnergij vblizi sterzhnya iz karbida bora i plotnost' zakhvatov nejtronov ' 1/v-detektorom vnutri sterzhnya. V doklade privoditsya takzhe metodika i rezul'taty ehksperimentov po otsenke ehffektivnosti povorotnykh kompensiruyushchikh tsilindrov, razmeshchennykh na granitse aktivnoj zony i otrazhatelya. (author)

  5. A Study of the Recoil Reactions of Three Isotopes of Ruthenium in Ruthenocene; Etude des Reactions d'Atomes de Recul de Trois Isotopes du Ruthenium dans le Ruthenocen; 0418 0417 0423 0427 0415 041d 0418 0415 0420 0415 0410 041a 0426 0418 0419 041e 0422 0414 0410 0427 0418 0422 0420 0415 0425 0418 0417 041e 0422 041e 041f 041e 0412 0420 0423 0422 0415 041d 0418 042f 0412 0420 0423 0422 0415 041d 041e 0421 0415 041d 0415 ; Estudio de las Reacciones de Retroceso de Tres Isotopos del Rutenio en el Rutenoceno

    Energy Technology Data Exchange (ETDEWEB)

    Harbottle, G.; Zahn, U. [Brookhaven National Laboratory, Upton, NY (United States)

    1965-04-15

    on daval eshhe odno (neizvestnoe) letuchee organicheskoe soedinenie so sledami rutenija, kotoroe mozhno otdelit' ot rutenosena mnogokratnoj sublimaciej. Kogda bombardirovalis' dvuhprocentnye rastvory rutenosena, nabljudavshiesja stepeni uderzhanija sostavljali 0,61 {+-}0,03, 1,04{+-}0,02 i 0,98{+-}0,02% sootvetstvenno. Jeti velichiny ne izmenjalis' v znachitel'noj stepeni, kogda bombardirovalsja rastvor, razbavlennyj v desjat' raz do 0,2% . Dlja togo, chtoby izuchit' vozmozhnyj jeffekt vjazkosti sredy, issledovalis' takzhe dvuhprocentnye rastvory rutenosena v benzine, soderzhashhie 2,10 i 20% poli- stirena. Zdes' takzhe rezul'taty byli vpolne analogichnymi rezul'tatam dlja chistogo benzola . Zamorozhennye rastvory benzola (2 i 0,2% rutenosena) izuchalis' takzhe, i zdes' velichiny uderzhanija priblizhalis' k velichinam uderzhanija kristallov rutenosena pri toj zhe temperature . Esli my opredelim 'izotopnyj jeffekt'kak(1-(uderzhanieRu{sup 97}/ uderzhanie Ru{sup 103})J *100 (v procentah), togda rastvory rutenosena imejut izotopnye jeffekty, sostavljajushhie v srednem 42% po sravneniju s bolee nizkimi ciframi 10 - 15% dlja kristallov i zamorozhennyh rastvorov. Vozmozhnym ob{sup j}asneniem bolee vysokogo uderzhanija i bolee nizkogo izotopnogo jeffekta javljaetsja bolee jeffektivnoe udalenie momenta otdachi kristallicheskoj reshetkoj po sravneniju s zhidkoj i dazhe s letuchej. No drugie faktory, naprimer relaksacija zarjazhennogo sostojanija razlichnyh izotopov rutenija vsled za snjatiem vozbuzhdenija jadernogo sostojanija soedinenija, dolzhny takzhe prinimat'sja vo vnimanie. Budut obsuzhdat'sja neskol'ko al'ternativnyh ob{sup j}asnenij jetih rezul'tatov. (author)

  6. The Hanford Emergency Dosimetry System; Le Systeme de Dosimetrie pour les Cas d'Urgence a Hanford; 0421 0418 0421 0422 0414 ; El Sistema Dosimetrico de Hanford para Casos de Urgencia

    Energy Technology Data Exchange (ETDEWEB)

    Larson, H. V.; Keene, A. R. [Radiation Protection Operation, Hanford Laboratories, General Electric Company, Hanford Atomic Products Operation, Richland, WA (United States)

    1965-06-15

    sotrudnikov. Dozimetricheskij personal s pomoshh'ju perenosnoj apparatury osushhestvljaet izmerenija Na{sup 24} in vivo na meste ili izmerenija aktivirovannoj indievoj fol'gi v plenochnom dozimetre s cel'ju predvaritel'noj ocenki dozy. Preduprezhdenie personala i rabota centrov avarijnogo kontrolja obespechivajut tehnicheskoe rukovodstvo i peredvizhnoe vspomogatel'noe oborudovanie, v tom chisle perenosnoj schetchik dlja izmerenija radioaktivnosti vsego organizma. S pomoshh'ju dublirujushhih laboratornyh ustrojstv osushhestvljaetsja vspomogatel'nyj dozimetricheskij kontrol' v rezul'tate provedenija analiza krovi na predmet opredelenija stepeni aktivacii Na{sup 24}, soderzhanija R{sup 32} v volosah, mnogoizotopnogo analiza vydelenij organizma, izmerenija radioaktivnosti vsego organizma i vyjavlenija zarazhennyh ran. Hjenfordskie dozimetry kritichnosti, ustanavlivaemye povsjudu na ustanovke v legkodostupnyh mestah, udaljajutsja i ocenivajutsja. V jetih dozimetrah imejutsja takie zhe jelementarnye fol'gi, kak i v plenochnom dozimetre, oni obespechivajut vtorichnye sredstva dlja ocenki dozy, poluchaemoj otdel'nymi licami. (author)

  7. Irradiation of Poultry and Egg Products; Irradiation de la Volaille et des Ceufs et Derives; Obluchenie domashnej ptitsy, yaits i izdelij iz nikh; Irradiacion de Volateria, Huevos y Productos Derivados

    Energy Technology Data Exchange (ETDEWEB)

    Thornley, Margaret J. [Sub-Department of Chemical Microbiology, Department of Biochemistry, University of Cambridge, Cambridge (United Kingdom)

    1966-11-15

    estudiaran las necesidades y ventajas economicas, la comestibilidad, la preparacion de productos, su envasado y su aceptacion por los consumidores. (author) [Russian] Domashnjaja ptica, jajca i izdelija iz nih mogut uspeshno obrabatyvat'sja s pomoshh'ju razlichnyh processov obluchenija v razlichnyh uslovijah. Kogda rech' idet o zarazhenii Salmonella mozhet osushhestvljat'sja 'radisidacija' s dozami porjadka 0,5 megarad. Jeto osobenno jeffektivno v otnoshenii zamorozhennyh produktov, takih kak jajca i nekotorye vidy domashnej pticy, osobenno utki. Takim zhe obrazom mogut obrabatyvat'sja suhie jaichnye produkty. Dannyj metod detal'no opisan drugimi avtorami (Lej, Mossel). Obrabotka tushek domashnej pticy s tem, chtoby oni mogli hranit'sja v techenie prodolzhitel'nogo vremeni, ili {sup r}adappertizacija{sup ,} mozhet byt' dostignuta s pomoshh'ju doz v 4,5 Mrad. Odnako narjadu s oblucheniem pri jetom dolzhny primenjat'sja drugie processy dlja predotvrashhenija nezhelatel'nyh privkusov. Jeti processy mogut zakljuchat'sja v predvaritel'nom nagrevanii dlja inaktivacii fermentov, obluchenii e zamorozhennom sostojanii, v vakuumnyh ili azotnyh upakovkah ili s aktivirovannym drevesnym uglem v upakovke, i inogda rekomendujutsja otdel'nye metody zharenija. Jeti metody predstavljajut interes dlja vooruzhennyh sil i shiroko izuchajutsja v ramkah programmy issledovanij armii SShA. Process 'radurizacii' v otnoshenii domashnej ptniy, t.e. uvelichenie sroka hranenija putem inaktivacii bol'shej chasti mikroorganizmov, vyzyvajushhih porchu produktov, predstavljajut interes dlja kommercheskogo ispol'zovanija. Dozy v diapazone 0,15-0,25 megarad mogut ispol'zovat'sja bez neblagoprijatnogo vozdejstvija na vkus produktov i uvelichat period hranenija bez porchi, vyzyvaemoj mikroorganizmami, v poltora - tri raza. Neobhodimym javljaetsja hranenie pri nizkih temperaturah (5 Degree-Sign C ili nizhe), i izmenenie vkusovyh kachestv v period hranenija mozhet ogranichit' prodolzhitel'nost' dannogo perioda

  8. Radiotracer Approaches to Carbamate Insecticide Toxicology; Emploi des radio indicateurs pour l'etude de la toxicologie des insecticides a base de carbamates; Primenenie radioaktivnykh indikatorov dlya izucheniya toksikologii karbamatnykh insektitsidov; Estudio con radioindicadores de la toxico logia de los insecticidas a base de carbamatos

    Energy Technology Data Exchange (ETDEWEB)

    Casida, J. E. [University of Wisconsin, Madison, WI (United States)

    1963-09-15

    5-[3-metil-2-dimetilcarbamil]- pirazolina) y un compuesto comparable indican tambien que el ataque oxidante forma derivados N-metilo y N-metilol. Faltan todavia muchos datos sobre la relacion entre esas reacciones de desintaxicacion y el mecanismo de resistencia, la accion de las sustancias sinergicas, la toxicidad selectiva de este grupo de insecticidas, y la naturaleza y el significado de los residuos. Es probable tambien que el metabolismo del Sevin inyectado en las plantas sea oxidativo mas que hidrolitico, pero no se ha establecido todavia la naturaleza de los productos y el mecanismo enzimatico. (author) [Russian] Metilkarbamaty yavlyayutsya odnoj iz glavnykh grupp insektitsidov. Mnogie nerazreshennye problemy toksikologii ehtikh veshchestv mogut byt' legko izucheny pri pomoshchi radioaktivnykh indikatorov. Byli izgotovleny N, N-dimetidkarbamaty, karbonilovaya gruppa kotorykh metilas' C{sup 14}, a takzhe N-metilkar- bamaty, metilovaya, karbonilovaya gruppa i kbl'tsa kotorykh byli mecheny C{sup 14}. Farmakologicheskoe dejstvie ehtikh slozhnykh soedinenij, veroyatno, svyazano s tormozheniem atsetilkholinesteraehy i mozhet vklyuchat' karbamilatsiyu. Mechenie karbonilovoj ili metilovoj gruppy karbamatov daet vozmozhnost' v ikh reaktsiyakh s ochishchennoj kholinesterazoj ili s drugimi ehsterazami kriticheski izuchit' reaktsiyu karbamida tsii, a takzhe legkost' samoproizvol'noj ili vyzvannoj reaktivatsii ili dekarbamilatsii. Fiziologicheskoe znachenie tormozheniya kholinesterazy mozhet byt' izucheno pri pomoshchi vvedeniya mechennogo C{sup 14} atsetata i analiza mechenogo atsetilkholina, nakopivshegosya v nervnykh tkanyakh, ili zhe putem ispol'zovaniya atsetil-C{sup 14}-kholina v kachestve substrata dlya opredeleniya In vitro stepeni tormozheniya kholiya- esterazy v tkanyakh otravlennykh zhivotnykh pri minimal'nom rastvorenii vo vremya analiza ingibitorov i fermentov.Nekotorye'uspekhi byli dostignuty pri pomoshchi mechennykh radioizotopami veshchestv v issledovanii

  9. Interpretation of Bioassay Data; Interpretation des Donnees de l'Analyse d'Echantillons Biologiques; Interpretatsiya dannykh biologicheskikh issledovanij; Interpretacion de Datos Obtenidos por Bioanalisis

    Energy Technology Data Exchange (ETDEWEB)

    Dolphin, G. W.; Jackson, S. [Health Physics and Medical Division, Atomic Energy Research Establishment, Harwell, Berkshire (United Kingdom)

    1964-10-15

    a un nivel determinado de la carga corporal. Es esencial que las mediciones para la vigilancia regular se efectuen con la maxima precision y se registren minuciosamente. Tales mediciones pueden utilizarse mucho tiempo despues para evaluar la carga corporal cronica. Se resumen los datos disponibles acerca del metabolismo humano y de la excrecion por via urinaria del tritio, cesio, uranio, estroncio, radio y plutonio. (author) [Russian] Dlja ocenki dozy obluchenija kriticheskogo organa, svjazannoj s vnutrennim zarazheniem radioizotopami, neobhodimo opredeljat' kolichestva izotopov v organizme. Esli radioizotop javljaetsja istochnikom gamma- ili rentgenovyh luchej ili beta-izluchenija, vyzyvajushhego sootvetstvujushhee tormoznoe izluchenie, prjamye izmerenija soderzhanija ego b organizme mogut proizvodit'sja s pomoshh'ju ustanovki dlja izmerenija radioaktivnosti vsego organizma. Kogda zhe sootvetstvujushhie izluchenija otsutstvujut, opredelenija-proizvodjatsja s pomoshh'ju izmerenija kolichestva radioizotopov v vydelenijah, krovi, vdyhaemom vozduhe ili mazkah, vzjatyh iz nosovoj ili rotovoj polosti. Provodilos' izuchenie vydelenija radioizotopov v moche kak pokazatelja vnutrennego zarazhenija. Analiz mochi javljaetsja naibolee shiroko ispol'zuemoj formoj biologicheskogo analiza. .Ochen' ver'eznym nedostatkom vse eshe javljaetsja maloe kolichestvo dannyh ob obmene radioizotopov, i neobhodimy dal'nejshie issledovanija. V dannom obzore dlja klassifikacii razlichnyh vidov obmena raznoobraznyh izotopov ispol'zovany tri bol'shie grupp'k Pervaja gruppa vkljuchaet*te radioizotopy, kotorye dovol'no odnorodno raspredeljajutsja v organizme. Vtoraja gruppa soderzhit te, kotorye koncentrirujutsja glavnym obrazom v odnom ili bolee organah tela. Tret'ja gruppa fakticheski javljaetsja osobo vazhnoj podgruppoj vtoroj gruppy i soderzhit otkladyvajushhiesja v kostjah izotopy. Vydelenie s mochoj i osobenno ego svjaz' s dozoj, poluchaemoj kriticheskimi tkanjami, otchetlivo razlichaetsja

  10. Patterns of Lethality and Absorbed Dose Distributions in Mice for Monoenergetic Neutrons; Letalite et Distribution de la Dose Absorbee chez la Souris pour des Neutrons Monoenergetiques; Letal'nost' i raspredelenie pogloshchennoj dozy pri obluchenii myshej monoehnergeticheskimi neitronami; Letalidad y Distribucion de las Dosis Absorbidas por el Raton para Neutrones Monoenergeticos

    Energy Technology Data Exchange (ETDEWEB)

    Frigerio, N. A.; Jordan, D. L. [Argonne National Laboratory, Argonne, IL (United States)

    1964-03-15

    kontrol' raspredelenija dozy vnutri zhivotnogo. Absoljutnoe izmerenie moshhnosti potoka proizvodilos' s pomoshh'ju schetchika delenija uran-235 i absoljutnogo scheta aktivnosti zolotyh provolok i fol'g, aktivirovannyh v kadmievom pokrytii. Pogloshhenie dozy izmerjalos' s pomoshh'ju mikro-ionizacionnoj kamery i special'no razrabotannogo vysokochuvstvitel'nogo dozimetra FeSO{sub 4}- NH{sub 4}SCN. Otnositel'nye izmerenija doz proizvodilis' s pomoshh'ju ga zo v o go schetchika protonov otdachi Hersta i V10, Lie i scintilljatorov protonov otdachi. Raspredelenie jenergii nejtronov izmerjalos' s pomoshh'ju special'no razrabotannyh B{sup 10} , Ne{sup 3} i L i{sup 6} gazovyh spektrometrov i spektrometrov tverdyh tel. Gamma-izluchenie izmerjalos' s pomoshh'ju Ne/Ag schetnyh kamer. Jeti izmerenija pokazali, chto dolja gamma-luchej sostavljala menee 0,8%, a teplovoe-nadteplovoe izluchenie men'she 0,01% obshhej dozy v radah. Zhivotnyh obluchali dozami so srednim znacheniem v sredinnoj tochke ot 180 do 1200 rad pri jenergii nejtronov ot 396 do 658 {+-}50 kjev dlja ohvata o b lasti N i O-rezonansov. Uroven' i harakter letal'nosti strogo zaviseli ot jenergii nejtronov i, v ravnoj s t e peni, no sam ostojat el'no, - ot raspredelenija dozy. Odnako,nezavisimo ot dozy, jenergii ili raspredelenija dozy, vse te zhe zhivotnye, kotorye vyzhili v techenie 5 dnej, prozhili dalee ne menee 144 dnej i pogibli zatem ot obychnyh dlitel'no dejstvujushhih faktorov. Jeto pokazyvaet, chto monojenergeticheskie bystrye nejtrony bez primesi gamma- ili nadteplovyh izluchenij mogut privodit' pochti bez iskljuchenija k rannej ''kishechnoj smerti''. (author)

  11. Saddle-Point Rotational States from Resonance Fission of Oriented Nuclei; Etats Rotationnels a l'Etranglement Resultant de la Fission, par Neutrons de Resonance, de Noyaux Orientes; 0412 0420 0410 0429 0410 0422 0415 041b 042c 041d 042b 0415 0421 041e 0421 0422 041e 042f 041d 0418 042f 0421 0415 0414 041b 041e 0412 041e 0419 0422 041e 0427 K 0418 0412 0420 0415 0417 0423 041b 042c 0422 0410 0422 0415 0420 0415 0417 041e 041d 0410 041d 0421 041d 041e 0413 041e 0414 0415 041b 0415 041d 0418 042f 041e 0420 0418 0415 041d 0422 0418 0420 041e 0412 0410 041d 041d 042b 0425 042f 0414 0415 0420 ; Estados Rotacionales en el Punto de Estrangulacion Debidos a la Fision por Resonancia de Nucleos Orientados

    Energy Technology Data Exchange (ETDEWEB)

    Dabbs, J. W.T.; Walter, F. J.; Parker, G. W. [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1965-07-15

    mucho mas preciso del numero y naturaleza de los canales de fision disponibles, cuestiones ambas que el fenomeno de la fision suscita desde hace mucho tiempo. En el {sup 235}U se observo, para las resonancias de 1,14 y 8,8 eV, una anisotropfa de los fragmentos de fision proxima al maximo posible, y de signo contrario al de la observada previamente en el caso de los heliones. Asimismo, se comprobo una marcada disminucion de la anisotropia para energias neutronicas proximas a la conocida resonancia de 0,3 eV. Como se carecia de informacion directa sobre los valores J del U se recurrio a un ajuste de niveles multiples a of, analogo al de Kirpichnikov y col., para el que se supuso que J(0,3 eV) Not-Equal-To J(1,14 eV), a diferencia de ajustes anteriores de caracter analogo. Estos datos iniciales son compatibles con una anisotropfa proporcional a la contribucion que se ha calculado aportan a of los dos valores posibles de J. Sin embargo, la forma de la curva no concuerda con otros datos tales como la variacion de la razon cresta a valle de Faler y Tromp; por consiguiente, no deben aceptarse aun como concluyentes los fuertes indicios de que J(0,3 eV) Not-Equal-To J(1,14 eV). Los autores estan efectuando mediciones complementarias para aclarar este concepto. (author) [Russian] Jadra aktinidnyh jelementov urana, neptunija i plutonija mozhno vystroit' v soedinenijah XO{sub 2}Rb(NO{sub 3}){sub 3} putem vzaimodejstvija kvadrupol'nogo momenta jadra s gradientom kristallicheskogo jelektricheskogo polja prosto v rezul'tate ohlazhdenija sootvetstvujushhego edinichnogo kristalla. Vystraivanie jader jetogo tipa sootvetstvuet neravnomernomu uglovomu raspredeleniju osi simmetrii sostavnogo jadra v prostranstve, chto otrazhaet v pervuju ochered' velichinu K. Esli predpolozhit', chto takovo zhe i raspredelenie oskolkov, to poluchim metod dlja ustanovlenija chisla kvantov K v sedlovoj tochke. V Okridzhe byli vypolneny jeksperimenty s vystroennymi jadrami urana-233 i urana{sup -}235 pri

  12. Scanning Techniques for Brain-Tumour, Localization; Techniques Scintigraphies pour la Iocalisation des Tumeurs Cerebrales; Tekhnika skennirovaniya pri opredelenii lokalizatsii opukholej mozga; Tecnicas Centelleograficas para la Localizacion de Tumores Cerebrales

    Energy Technology Data Exchange (ETDEWEB)

    Duggan, M. H.; Brice, J.; Jones, E.; Mallard, J. R.; Myers, M. L. [Department Of Medical Physics, Postgraduate Medical School, Hammersmith Hospital, London (United Kingdom)

    1964-10-15

    vstrechajushhiesja geometricheskie iskazhenija. Oni voznikajut i v otnoshenii bulavochnyh i matrichnyh apertur nabljudenija. Obsuzhdajutsja uluchshenija, dostignutye v rezul'tate rjada izmenenij, napravlennyh na ustranenie zavisimosti razmera izobrazhenija ot jenergii gamma-luchej. Analiz dannyh skennirovanija mozga predstavljaet trudnosti, esli skorost' scheta v issleduemoj oblasti tol'ko nemnogo vyshe, chem'v okruzhajushhej tkani. ''Normal'naja'' diagramma skorosti scheta dlja golovy byla opredelena na osnovanii razdelenija skennogrammy na rjad oblastej, kotorye javljajutsja priblizitel'no jekvivalentnymi anatomicheski u rjada pacientov i putem izmerenija skorosti scheta v predelah scentiskennograficheskih otmetok v kazhdoj oblasti. Pojetomu ljubuju patologicheskuju skennogrammu mozhno sravnivat' s jetoj diagrammoj. Pri takom analize pribegajut k schetno-vychislitel'nym metodam. Ispol'zovanie metoda postojannogo usrednenija takzhe imeet znachenie dlja uluchshenija vizual'nogo nabljudenija otklonenij ot normy vblizi granic detektirovanija v podvizhnyh detektornyh sistemah. Rassmatrivajutsja vozmozhnosti primenenija s jetoj cel'ju mnogokanal'nyh analizatorov i ispol'zovanija v to zhe vremja novogo cennogo vosproizvodjashhego ustrojstva kak dlja podvizhnoj, tak i stacionarnoj sistem. (author)

  13. Economic Criteria Applied to Nuclear Materials Management; Criteres Economiques Applicables a la Gestion des Matieres Nucleaires; Ehkonomicheskie kriterii, primenyaemye pri kontrole i uchete yadernykh materialov; Criterios Economicos Aplicados a la Administracion de Materiales Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Shelley, W. J.; Kuehn, M. N. [Mallinckrodt Chemical Works, St. Charles, MS (United States)

    1966-02-15

    procedimientos, las tecnicas, el proceso de las operaciones y la forma en que el personal lleva a cabo su cometido. Esta atencion y la voluntad de corregir los. errores permitiran asegurar el equilibrio optimo de los costos y las necesidades. (author) [Russian] Kontrol' i uchet jadernyh materialov dolzhny vsegda igrat' vspomogatel'nuju rol' pri vypolnenii osnovnoj zadachi obrabotki jadernyh materialov, t.e. vyrabotki jenergii ili proizvodstva konechnyh produktov. V svjazi s jetim otvetstvennye za kontrol' i uchet jadernyh materialov dolzhny postojanno reagirovat' na nuzhdy, svjazannye s vypolneniem osnovnoj proizvodstvennoj zadachi, i prisposablivat' neobhodimye sistemy k jetomu processu s tem, chtoby osushhestvljat' kontrol' i uchet jadernyh materialov pri optimal'nyh zatratah. V svjazi s sistemoj kontrolja i ucheta jadernyh materialov neobhodimo tshhatel'no izuchat' rjad faktorov, kotorye vlijajut na ee stoimost'. Razrabotannaja sistema kontrolja dolzhna dopolnjat' proizvodstvennyj process, obespechivaja minimal'nye rashody na soderzhanie personala, analizy i minimal'nyj pereryv proizvodstvennogo processa. Sistema kontrolja dolzhna sochetat'sja s proizvodstvnnymi potrebnostjami dlja togo, chtoby poluchennaja kolichestvennaja informacija bystro postupala licam, osushhestvljajushhim kontrol' za rabotoj. Sistema registracii i vydachi svedenij dolzhna obespechivat' maksimum dopolnitel'nyh dannyh. Ona dolzhna byt' shodnoj s sistemami, kotorye ispol'zujut postavshhiki i potrebiteli, i davat', pri vozmozhnosti, dopolnitel'nuju informaciju, svjazannuju s partijami jadernogo materiala. Dannye,poluchaemye dlja kontrolja za jadernymi materialami, dolzhny byt' tol'ko takimi, kotorye neobhodimye celjah obespechenija togo, chtoby ne bylo nikakih znachitel'nyh poter', hishhenij, nezakonnogo prisvoenija ili ispol'zovanija ne po naznacheniju jadernyh materialov. Dopolnitel'nye dannye dolzhny podvergat'sja tochno takoj zhe neobhodimoj strogoj proverke, kotoroj podvergajutsja dannye

  14. Measurements of the Asymptotic Spectrum of a Multiplying Medium; Mesures du Spectre Asymptotique d'Un Milieu Multiplicateur; Izmereniya asimptoticheskogo spektra umnozhayushchej sredy; Mediciones del Espectro Asintotico en un Medio Multiplicador

    Energy Technology Data Exchange (ETDEWEB)

    Slovacek, R. E.; Cerbone, R. J.; Gaerttner, E. R.; Fullwood, R. R.; Bach, D. R. [Rensselaer Polytechnic Institute, Troy, NY (United States)

    1965-08-15

    rasshirenii stepeni sravnenija v bolee vysokih energijah izmerennyj potok utechki ravnjalsja priblizitel'no 50 %, chem jeto predusmatrivalos' raschetami. Izmerenija poverhnostnogo spektra, poluchennye za poslednee vremja, imejut bolee luchshie statisticheskie dannye po sravneniju s drugimi raschetami poverhnostnyh spektrov. Metod izmerenija asimptoticheskogo spektra byl pokazan kak metod, poleznyj dlja izuchenija spektra pozicionnoj zavisimosti. Izmerenija staticheskogo spektra byli takzhe polucheny v odnoj iz sistem s cel'ju sravnenija oboih metodov pri ispol'zovanii odnogo i togo zhe spektrometra. Jeti rezul'taty poka eshhe analizirujutsja. Poskol'ku plotnost' asimptoticheskih nejtronov imeet postojannoe prostranstvennoe rasprostranenie, kotoroe gorazdo luchshe poddaetsja analizu, to asimptoticheskij metod, primenjaemyj k razmnozhajushhim sistemam, dolzhen okazat'sja chrezvychajno poleznym dlja izuchenija spektral'nyh problem kosmicheskoj zavisimosti pri sverh bol'shih energijah. (author)

  15. Studies on the Relationship of Organ Size and Scanning Picture; Etudes sur la Relation entre les Dimensions de l'Organe et le Scintigramme; Izuchenie sootvetstviya razmera organa i izobrazheniya ego na skennogramme; Estudios sobre la Relacion entre las Dimensiones de un Organo y el Centelleograma

    Energy Technology Data Exchange (ETDEWEB)

    Wolf, R.; Fischer, J. [Institute for Clinical Radiology and I. Medical Clinic and Policlinic, University of Mainz, Federal Republic of Germany (Germany)

    1964-10-15

    metod opredelenija razmera pecheni s ispol'zovaniem razlichnyh porogov propuskanija. Dlja takih organov, kak shhitovidnaja zh eleza i pochki, predstavljaet interes ustanovit' chetkoe sootvetstvie s rentgenov skim snimkom ili rezul'tatami pal'pacii i akkumulirujushhej i neakkumulirujushhej tkan'ju. Vazhno tochno ustanovit' razmer jet o g o sootnoshenija, naprimer, pri scintigrafii krovjanyh depo s erdechnososudistoj sistemy. Chto k asaet sja takogo organa, kak s elezenka, razmery kotoroj mogut bystro menjat'sja pri razlichnyh zabolevanijah, to tochnost' scintigraficheskogo izobrazhenija imeet reshajushhee znachenie. S jetoj cel'ju byla provedena celaja serija issledovanij na fantome dlja opredelenija tochnosti scintigraficheskogo izobrazhenija pri razlichnyh uslovijah. Ispol'zovavshiesja modeli byli izgotovleny iz plastika i mogli zapolnjat'sja radioaktivnymi rastvorami. Issledovanija provodilis' na otkrytom vozduheipod vodoj; izuchalis' rezul' taty izmerenija u koncentracii radioizotopov, a takzhe takie parametry, kak rasstojanie ot ob{sup e}kta do kollimatora, granica propuskanija, kontrastnoe uvelichenie, skorost' razvertki, prolet kanalov spektrometra i glubina vodnoj absorbirujushhej massy vokrug organa. Ispol'zovalsja ''Magnaskenner'' firmy Pikker s dvumja razlichnymi kollimatorami, kollimator s 19 jachejkami i kollimator s tonkoj fokusirovkoj, imejushhej 31 jachejku. Poslednij ispol'zovalsja tol'ko dlja shhitovidnoj zhelezy. Rezul'taty pokazali, chto tochnost' izobrazhenija pri ispol'zovanii kollimatora s tochnoj fokusirovkoj zavisit ot izmenenij rasstojanija ot kollimatorad o ob{sup e}kta. S drugoj storony, pri ispol'zovanii kollimatora s 19 jachejkami rasstojanie ne imeet bol'shogo zn a chenija. Kogda sverjajutsja razmery, luchshe v sego rabotat' pri odnoj i toj zhe maksimal'noj cha st o tepovtorenija impul'sov, naskol'ko jeto vo zm ozhno. Pri sobljudenii fiksirovannogo sootnoshenija mezhdu shirinoj kanala spektrometra, porogom propuskanija, chastotoj impul

  16. Accumulation of a Hot Ion Plasma in PR-5; Accumulation d'un Plasma a Ions Chauds dans l'Installation PR-5; Nakoplenie plazmy s goryachimi ionami na ustanovke PR-5; Acumulacion de un Plasma con Iones Calientes en la Instalacion PR-5

    Energy Technology Data Exchange (ETDEWEB)

    Gott, Ju. V.; Ioffe, M. S.; Jushmanov, E. E. [Institut Atomnoj Ehnergii Im. I.V. Kurchatova, Moskva, SSSR (Russian Federation)

    1966-04-15

    {mu}sec; los autores suponen que un valor tan pequeno de {tau} esta relacionado con la transferencia de cargas de los iones rapidos en el gas neutro que se separa de las paredes durante la inyeccion. En la presente memoria se investiga la posibilidad de obtener y confinar durante largo tiempo un plasma de densidad n Greater-Than-Or-Equal-To 10{sup 11} cm{sup -3} y T{sub i} Asymptotically-Equal-To 5 keV. El estudio experimental del comportamiento de un plasma de esta naturaleza presenta interes porque segun la teorfa de Mijailovsky- Timofeev para los indicados valores de n y T{sub i} aparecera una inestabilidad ciclotronica de deriva. Esta inestabilidad, condicionada por la no homogeneidad radial de la densidad, tendra lugar cuando: ({rho}/a){sup 2} > 4[(H{sup 2}/4{pi}m{sub i}c{sup 2}) + (m{sub e}/m{sub i})] donde pi es el radio de Larmor de los iones y a, la dimension caracteristica de la no homogeneidad. Para las condiciones tipicas de la instalacion PR-5 (H = 4000 Oe, {rho}{sub i}/a Asymptotically-Equal-To 0.25) se cumple este criterio a partir de n Asymptotically-Equal-To 5 x 10{sup 10} cm{sup -3}. Para obtener un plasma que tenga estos parametros se utiliza una variante de la inyeccion por magnetron en la que los iones del cordon de plasma frio son acelerados por medio de un campo electrico variable de tipo radial, de frecuencia comprendida entre 3 y 6 MHz. La retencion del plasma.se registra where {rho}i is the ion Larmor radius and a is a characteristic length of the inhomogeneity. For typical conditions in PR-5 (H = 4000 Oe, {rho}{sub i}/a Asymptotically-Equal-To 0.25), this criterion is fulfilled starting from durante el tiempo de su desintegracion libre por tres metodos: utilizando un radiointerterometro ({lambda} = 8 mm), por la corriente de atomos rapidos dotados de transferencia de carga y por la absorcion del haz de atomos calientes de potasio. (author) [Russian] V jeksperimentah na ustanovke PR-5, vypolnennyh ranee, bylo pokazano, chto zhe- lobkovaja

  17. Action of Mercaptan and Disulfide in Hydrogen Atom Exchange Reactions; Action des Thioalcools et des Disulfures dans les Reactions d'Echange d'Atomes d'Hydrogene; Vozdejstvie merkaptanov i disul'fidov v reaktsiyakh obmena atoma vodoroda; Accion de los Mercaptanos y Disulfuros en las Reacciones de Intercambio del Hidrogeno Atomico

    Energy Technology Data Exchange (ETDEWEB)

    Cohen, S. G. [Brandeis University Waltham, MA (United States)

    1965-10-15

    radikalami, a takzhe fotohimicheskie i navedennye radiaciej bol'shoj jenergii reakcii mogut byt' katalizirovany ili zatormozheny bystrymi reakcijami obmena atoma vodoroda merkaptanov i disul'fidov. Navedennye pod vlijaniem sveta radikaly i senzitivirovannye benzofenonom reakcii dekarbonizacii aldegidov katalizirujutsja merkaptanami. Cepnaja reakcija posledovatel'nogo perenosa vodoroda R' + RCH = O -> RH + RC = O uskorjaetsja analogichnoj posledovatel'nost'ju perenosov atoma vodoroda s uchastiem slozhnyh soedinenij sery: R' + C{sub 6}H{sub 5}CH{sub 2}SH -> RH + C{sub 6}H{sub 5}CH{sub 2}S'; C{sub 6}H{sub 5}CH{sub 2}S + RCH = 0 -> C{sub 6}H{sub 5}CH{sub 2}SH + RC = 0. Fotovosstanovlenie benzofenona v 2-propanole vedet k obrazovaniju benzpinakola cherez necepnuju reakciju posredstvom radikalov (C{sub 6}H{sub 5}){sub 2}C-OH and (CH{sub 3}){sub 2}COH. Jeta reakcija zamedljaetsja i tormozitsja merkaptanom i disul'fidom, kotorye vnov' prevrashhajut radikaly v ishodnye materialy bystrymi reakcijami perenosa vodoroda, a sami reagenty regenerirujutsja v svoi sostojanija drugoj valentnosti, prichem kazhdaja molekula slozhnogo soedinenija sery prohodit bez himicheskih posledstvij cherez mnogie kvanty: (C{sub 6}H{sub 5}){sub 2}C-OH + AS' -> (C{sub 6}H{sub 5}){sub 2}C = O + ASH; (CH{sub 3}){sub 2}C-OH + ASH -> (CH{sub 3}){sub 2}C = 0 + AS'. Dokazatel'stvami takogo mehanizma mogut sluzhit': privedenie v sostojanie ravnovesija pervonachal'no prisutstvovavshego merkaptana ili disul'fida vo vremja tormozhenija; grozdevanie opticheski aktivnogo spirta vo vremja tormozhenija; obmen dejterija vo vremja tormozhenija. Analogichnoe tormozhenie nabljudaetsja pri obrazovanii odnogo tol'ko promezhutochnogo radikala, kak jeto proishodit v spirtovyh sostavah benzofenona - benzgidrola i acetofenona - {alpha} - metilbenzila. Tormozhenie slozhnymi soedinenijami sery putem takogo zhe mehanizma nabljudaetsja v navedennom gamma-luchami kobal'ta-60 prevrashhenii benzofenona v benzpinakol; naftalin ne proizvodit

  18. Rapid Estimation of Fast-Neutron Doses following Radiation Exposure in Criticality Accidents: The S{sup 32}(n, p)P{sup 32} Reaction in Body Hair; Prompte Evaluation des Doses de Neutrons Rapides apres une Exposition au Rayonnement a la Suite d'Accidents de Criticite: Reaction {sup 32}S(n, p){sup 32}P dans le Systeme Pileux; 0411 042b 0421 0414 ; Evaluacion Acelerada de Dosis de Neutrones Rapidos Despues de una Irradiacion Consecutiva a un Accidente de Criticidad: La Reaccion {sup 32}S(n, p){sup 32}P en el Pelo

    Energy Technology Data Exchange (ETDEWEB)

    Petersen, D. F. [Los Alamos Scientific Laboratory, University of California, Los Alamos, NM (United States)

    1965-06-15

    han deducido para cada caso, concordaban satisfactoriamente con las determinaciones independientes de las fisiones totales efectuadas por procedimientos analiticos clasicos. Para obtener rapidamente la dosis aproximada de neutrones rapidos, basta multiplicar por 0,49 la actividad del {sup 32}P, expresada en des/min. g de pelo a T = 0 y medida con cualquier sistema de recuento de rendimiento conocido, para obtener la dosis neutronica en rad correspondiente al 'nivel azufre'. (author) [Russian] Sochetanie unikal'nogo himicheskogo sostava, opredelennogo anatomicheskogo stroenija i dostupnosti, delaet chelovecheskij volos poleznym materialom dlja bystroj ocenki doz bystryh nejtronov, poluchaemyh personalom, svjazannym s rabotoj v avarijnyh uslovijah v kriticheskom sostojanii. V chelovecheskom volose otmechaetsja odno i to zhe soderzhanie sery, nezavisimo ot pola, cveta ili raspredelenija. Velichina 0,048 {+-} 0,005g sery na 1 g volosa ukazyvaet, chto 5 % mogut byt' ispol'zovany v kachestve standartnoj cifry dlja harakteristiki soderzhanija sery pri predvaritel'nyh ocenkah dozy bez vnesenija popravok na analiz soderzhanija sery v volosah otdel'nyh lic. Pri otsutstvii legko udaljaemogo vneshnego zagrjaznenija v volosah soderzhitsja menee 0,025 procentov fosfora. Poskol'ku poperechnye sechenija aktivacii fosfora i sery odinakovy, fakticheskoe otsutstvie fosfora daet vozmozhnost' ispol'zovat' volos v kachestve porogovogo detektora dlja biologicheskoj sery pri izmerenii potoka nejtronov s jenergiej svyshe 2,5 Mjev s pomoshh'ju reakcii S{sup 32}(n, p)P{sup 32}. Razrabotany metody dlja bystrogo vydelenija radiohimicheski chistogo R{sup 32} s cel'ju obespechenija klinicheski poleznyh ocenok obluchenija bystrymi nejtronami postradavshih vo vremja avarij v kriticheskom sostojanii. Pri otsutstvii bol'shogo zagrjaznenija produktami delenija predvaritel'nye ocenki mozhno provesti v techenie dvuh chasov. Dlja osushhestvlenija bolee shirokoj procedury po udaleniju produktov delenija

  19. Establishment of the Processes of Absorption and Diffusion of Systemic Insecticides in Populus Euramericana Dode Guinier ''Robusta''; L'etablissement des processus d'absorption et diffusion des insecticides systemiques au Populus x Euramericana Dode Guinier ''Robista; Opredelenie protsessov pogloshcheniya i diffuzii somaticheskikh insektitsidov u Populus x Euramerican a Dode Guinier ''Robusta''; Determinacion de los procesos de absorcion y difusion de los insecticidas sistemicos en el Populus x Euramericana Dope Guinier ''Robusta''

    Energy Technology Data Exchange (ETDEWEB)

    Catrina, I.; Popa, A.; Constantinesco, V.; Constantinesco, O.; Constantinesco, El.; Hulula, C. [Institut de Recherches Forestieres de Bucarest, Bucharest (Romania)

    1963-09-15

    kontsevykh chastyakh rastenij. V obshchem,pri dannom opyte nakoplenie insektitsida sostavilo 1,65 mg/g zelenogo veshchestva po sravneniyu s 0,24 mg/g ehtogo zhe veshchestva u rastenij, vyrashchennykh v laboratornykh usloviyakh. Iz ehtogo sleduet,chto na pochve dvukhletnie topoli Robusta mogut v sukhoe vremya goda nakaplivat' ''Dipterex'', kotoryj byl vveden v vodnom rastvore v otnoshenii 9,3% k kolichestvu, vnesennomu v zemlyu. Pri provedenii opytov v laboratornykh usloviyakh ehto otnoshenie sostavlyalo 1,35%. Nanesenie rastvorov na listvu putem razbryzgivaniya daet slabyj koehffitsient pogloshcheniya in sektitsida, chto ob{sup y}asnyaetsya takzhe trudnym protsessom pogloshcheniya u list'ev i smyvaniem insektitsida dozhdevoj vodoj, rosoj i tumanom. Na zemle obnaruzheno bol'shoe kolichestvo insektitsida. V svyazi s ehtim my schitaem, chto metodu vneseniya rastvorov somaticheskikh insektitsidov v pochvu dolzhno byt' otdano predpochtenie v bor'be s vreditelyami drevesnykh porod. (author)

  20. Scanning Study of 700 Livers Evaluation of Existing Diagnostic Procedures; Etude Scintigraphique de 700 Foies (Evaluation des Procedures Actuelles de Diagnostic); Issledovanie pecheni 700 bol'nykh s pomoshch'yu skennirovaniya; Exploracion Hepatica de 700 Pacientes (Evaluacion de los Metodos Actuales De Diagnostico); Exploracion Hepatica de 700 Pacientes (Evaluacion de los Metodos Actuales de Diagnostico)

    Energy Technology Data Exchange (ETDEWEB)

    Czerniak, P. [Radium and Isotope Institute, Government Hospital, Tel-Hashomer (Israel)

    1964-10-15

    , a takzhe v 14% sluchaev drugih zabolevanij pecheni. Reakcii Vajnberga i Kasoni byli polozhitel'ny v 64% sluchaev jehinokokkovoj bolezni, a takzhe v 22%sluchaev drugih zabolevanij. Pri zlokachestvennyh zabolevanijah pecheni ogranichennyj uchastok porazhenija byl obnaruzhen v 44% sluchaev, nejasnaja skennogramma v 30%, morfologicheskie izmenenija -v*29%. V dvuh iz 158 sluchaev skennogramma oshibochno okazalas' normal'noj, odnako v 40% jetih zhe sluchaev laboratornye rezul'taty byli otricatel'nymi. Blagodarja primeneniju metoda dvuh i trehploskostnogo stereoskennirovanija v 45% sluchaev byli polucheny novye i dopolnitel'nye dannye o sostojanii pecheni. Skennirovanie pecheni primenjalos' takzhe pri posledujushhih issledovanijah. Bylo obnaruzheno, chto: 1) posle jehinokokkotomii ostaetsja otchetlivyj rubec kak ogranichennyj uchastok porazhenija; 2) cherez tri mesjaca posle izlechenija amebnogo abscessa proishodit polnaja regeneracija; 3) posle sozdanija porto-kaval'nogo anastomoza razmer skennogrammy pecheni umen'shaetsja , a selezenki -uvelichivaetsja, dazhe pri udovletvoritel'nom obshhem sostojanii; 4) pri nekotoryh diffuznyh porazhenijah pecheni citostaticheskie agenty mogut byt' vremenno jeffektivny; 5) pri povtornom skennirovanii predpolagaemoe zabolevanie mozhet okazat'sja ogranichennym uchastkom porazhenija ili ischeznut'. Takim obrazom diagnoz zavisit ot vremeni skennirovanija. Vyvody: 1. Skennirovanie pecheni mozhet schitat'sja ochen' poleznym metodom klinicheskogo, morfologicheskogo i topograficheskogo diagnoza pri patologicheskih izmenenijah pecheni. 2. Rezul'taty mogut byt' uluchsheny putem: a) uluchshenija apparatury i primenenija metodov stereoskennirovanija, b) luchshego sotrudnichestva mezhdu terapevtami i hirurgami. (author)

  1. Nuclear geophysics in prospecting for ore and coal deposits; Geophysique nucleaire et prospection des gisements de charbon et autres mineraux; Yadernaya geofizika pri razvedke rudnykh i ugol'nykh mestorozhdenij; Geofisica nuclear u prospeccion de yacimientos de carbon y otros minerales

    Energy Technology Data Exchange (ETDEWEB)

    Bulashevich, Yu P; Voskobojnikov, G M; Muzyukin, L V

    1962-01-15

    captura de neutrones termicos del boro hace posible determinar estratos boriferos en la zona del sondeo empleando los metodos E.G.N. y E.N.N. La influencia del agua se elimina mediante sondeos inversos. Este metodo, asi como otros sistemas de exploracion por activacion neutronica, han sido aplicados tambien en diversos yacimientos de cobre, manganeso, aluminio y otros minerales. La exploracion por activacion continua esta indicada cuando el periodo de semi [Russian] Na rudnykh i ugol'nykh mestorozhdeniyakh metody yadernoj geofiziki primenyayutsya glavnym obrazom pri karotazhe razvedochnykh skvazhin. Na rudnykh i ugol'nykh mestorozhdeniyakh Sovetskogo Soyuza nakhodyat shirokoe proizvodstvennoe primenenie sleduyushchie vidy radioaktivnogo ili yadernogo karotazha (RK): plotnostnoj ili gamma-gamma karotazh (GGK) s istochnikom izlucheniya Co{sup 60}, selektivnyj gamma-gamma karotazh (SGGK) s istochnikom myagkogo izlucheniya tipa S75, nejtron-nejtronnyj karotazh (NNK) i nejtronnyj gamma karotazh s Ro-Ve istochnikom nejtronov, akti- vatsionnyj, v chastnosti nepreryvnyj, karotazh s tem zhe istochnikom, a takzhe foto-nej- tronnyj karotazh s gamma-izluchatelem Sb{sup 124}. Osnovnaya zadacha RK na rudnykh mestorozhdeniyakh - vydelenie rudnykh zon v razreze skvazhin, chto sokrashchaet intervaly oprobovaniya, i orientirovochnaya otsenka soderzhaniya poleznogo komponenta in situ. Na ugol'nykh mestorozhdeniyakh RK reshaet zadachu opredeleniya glubiny zaleganiya, moshchnosti i stroeniya ugol'nykh plastov. ' Metody GGK i SGGK osnovany na registratsii rasseyannogo gamma-izlucheniya istochnika. Pri dostatochnoj zhestkosti izlucheniya istochnika i slaboj chuvstvitel'nosti indikatora intensivnost' rasseyannogo izlucheniya zavisit tol'ko ot plotnosti porody i rasstoyaniya mezhdu istochnikom i indikatorom. EHto sluchaj GGK, kotorym ugol'nye plasty vydelyayutsya po maksimumam rasseyannogo izlucheniya. V SGGK sushchestvenna registratsiya myagkoj chasti spektra rasseyannogo izlucheniya

  2. Ultimate Storage of High-Level Waste Solids and Liquids in Salt Formations; Stockage Definitif de Dechets Solides et Liquides de Haute Activite dans des Formations Salines; 041e 041a 041e 041d 0427 0410 0422 0415 041b 042c 041d 041e 0415 0425 0420 0410 041d 0415 041d 0418 0415 0422 0412 0415 0420 0414 042b 0425 0418 0416 0418 0414 041a 0418 0425 0412 042b 0421 041e 041a 041e 0410 041a 0422 0418 0412 041d 042b 0425 041e 0422 0425 041e 0414 041e 0412 0412 0421 041e 041b 042f 041d 042b 0425 041e 0411 0420 0410 0417 041e 0412 0410 041d 0418 042f 0425 ; Almacenamiento Definitivo de Desechos Solidos y Liquidos de Elevada Radiactividad En Formaciones de Rocas Salinas

    Energy Technology Data Exchange (ETDEWEB)

    Bradshaw, R. L.; Boegly, Jr., W. J.; Empson, F. M.; Kubota, H.; Parker, F. L.; Perona, J. J.; Struxness, E. G. [Oak Ridge National Laboratory, TN (United States)

    1963-02-15

    othodov 70 Degree-Sign C, jeffektivnaja ploshhad' shahty dolzhna sostavljat' ot 34 akrov v god dlja othodov, vyderzhannyh v techenie 120 dnej, do 5 akrov v god dlja othodov, vyderzhannyh v techenie 30 let. V sluchae hranenija othodov v tverdom vide nad polom shahty neobhodimaja ploshhad' sokrashhaetsja v 2,3 raza. Dlja cilindricheskih emkostej,v sluchae ih hranenija v otverstijah v polu razrabotki, neobhodimoe prostranstvo ostaetsja takim zhe, kak pri hranenii tverdyh othodov nad polom. Proizvodimye v nastojashhee vremja issledovanija v pervuju ochered' kasajutsja udalenija upakovannyh tverdyh othodov. Verojatno v techenie 1965 goda budet postavlen opyt v nastojashhej soljanoj razrabotke. (author)

  3. Biological Effects of Thermal Neutrons and the B{sup 10}(n, {alpha}) Li{sup 7} reaction; Effets Biologiques des Neutrons Thermiques et la Reaction {sup 10}B(n, {alpha}){sup 7}Li; Biologicheskoe dejstvie teplovykh nejtronov i reaktsiya B{sup 10}(n, {alpha}) Li{sup 7}; Efectos Biologicos de los Neutrones Termicos y la Reaccion {sup 10}B(n, {alpha}){sup 7}Li

    Energy Technology Data Exchange (ETDEWEB)

    Archambeau, J. O.; Alcober, V.; Calvo, W. G.; Brenneis, H. [Medical Research Center, Brookhaven National Laboratory, Upton, NY (United States)

    1964-05-15

    -izluchenija, pojavljajushhegosja pri zahvate teplovyh nejtronov jelementami tkani i jekranirujushhih materialov, a takzhe gamma-izluchenija i obluchenija bystrymi nejtronami, pojavljajushhimisja pri processah delenija v aktivnoj zone reaktora. Konechnyj rezul'tat obluchenija teplovymi nejtronami javljaetsja funkciej padajushhego potoka nejtronov. Poskol'ku plotnost' potoka teplovyh nejtronov v tkani bystro padaet (sloj polovinnogo pogloshhenija Approximately-Equal-To 1,8 sm), dlja obespechenija vysokih doz v glubine na poverhnost' dolzhny popadat' bol'shie dozy. Pojetomu reakcii legkih, kishechnika, kostnogo mozga i slizistoj obolochki zavisjat glavnym obrazom, ot gamma-obluchenija v rezul'tate zahvata nejtronov vyshelezhashhimi tkanjami. Obluchenie golovy u sobak pri nejtronnom potoke 1.4 x 10{sup 14}/cm{sup 2} privodit k jepiljacii, jeriteme i vlazhnoj deskvamacii s soputstvujushhim ugneteniem krovotvorenija. Odnako v techenie 25-30 dnej na''ljudaetsja vosstanovlenie dejatel'nosti kostnogo mozga i izlechenie kozhnyh porazhenij. Pri nejtronnom obluchenii zhivotnyh 5 x 10{sup 13} n/cm{sup 2} cherez 30 minut posle vnutrivennogo vvedenija 35 mg/kg bora-10 u zhivotnyh nabljudaetsja nekroticheskij jepidermit, otek kozhi golovy i kon{sup j}unktivit. B mozgu obnaruzhivajutsja kapiljarnye krovoizlijanija i staz s povrezhdeniem nejtronov i astrocitov i narusheniem jendotileja kapilljarov. Znachitel'no umen'shaetsja chislo trombocitov, kotoroe usugubljaet mestnye izmenenija. Zhivotnye pogibajut ot krovotechenij i/ili mozgovyh narushenij na 5 -8-j den' posle obluchenija. Jeti jeffekty svjazyvajut kak s gamma- tak i s al'fa-oblucheniem, voznikajushhim pri zahvate nejtronov borom (B{sup 10}(n, {alpha}) Li{sup 7}). Obluchenie kozhi svinej pri 5 x 10{sup 12} n/cm{sup 2} ne privodit k gistologicheskim izmenenijam. Pri obluchenii kozhi posle vnutrivennogo vvedenija 35 mg/kg bora-10 pri takoj zhe moshhnosti nejtronnogo potoka razvivaetsja klassicheskij radio-jepidermit, izlechivajushhijsja cherez36 -40 dnej

  4. Studies on radiation-image detectors; Etudes sur les detecteurs a images de rayonnements; Izuchenie detektorov izobrazheniya radiatsii; Estudios sobre detectores de radiaciones productores de imagenes

    Energy Technology Data Exchange (ETDEWEB)

    Reiffel, L [Armour Research Foundation, Chicago, IL (United States)

    1962-04-15

    expone datos relativos a sus caracteristicas opticas, que son tambien aplicables a la tecnologia de la camara de centelleo. Examina brevemente algunos tipos de detectores productores de imagenes, que podrian construirse empleando gruesos bloques de sustancias capaces de acumular energia en cantidad considerable y de producir fosforescencia estimulada cuando se someten a irradiacion, asi como algunos metodos de lectura en los que se emplean haces opticos de exploracion para evitar la disminucion de poder de resolucion debida al espesor finito del fosforo. (author) [Russian] Opisana provodimaya v nastoyashchee vremya rabota po izucheniyu detektorov izobrazheniya radiatsii, sposobnykh sokhranyat' informatsiyu o prostranstvennom raspredelenii. My zanimaemsya, glavnym obrazom, izucheniem problem, svyazannykh s opredeleniem raspredeleniya intensivnosti radiatsii na ploskosti, a vozmozhno, i na tsilindricheskoj poverkhnosti. V ehtu kategoriyu problem vkhodyat diffraktsiya nejtronov i radiografiya, a takzhe radiografiya rentgenovskikh luchej i gamma-izluchenij, ili zhe issledovanie rasseyaniya s pomoshch'yu takikh vidov izluchenij. Osobyj upor delaetsya na izuchenie detektorov izobrazheniya radiatsii, osnovannykh na razrushenii iskr, i na lyuminestsentsii ili navedennoj fosforestsentsii. My vyrabotali schetchiki iskr ochen' bol'shikh razmerov, vesom bolee 100 funtov, imeyushchie svetochuvstvitel'nye poverkhnosti poryadka 2000 kv. sm., kotorye snabzheny sistemoj ustupchatykh ploskostej pochti s 400 anodnykh i katodnykh provodov. Primenenie schetchikov, napolnennykh VOZDUKHOM ili gazovoj smes'yu argona s metanom dlya izmereniya potoka, sozdaet ustrojstvo, chuvstvitel'noe k al'fa-chastitsam, a obnaruzhenie medlennykh nejtronov dostigaetsya plastinami preobrazovatelya, obogashchennogo B{sup 10}. S drugimi zapolnyayushchimi gazami obnaruzhivalas' chuvstvitel'nost' k protonam i ehlektronam. Registratsiya raspredeleniya intensivnosti dostigaetsya fotograficheskoj s{sup e

  5. Fixation of Simulated Highly Radioactive Wastes in Glassy Solids; Fixation de Dechets Simules de Haute Activite dans des Soudes Vitreux; 0424 0418 041a 0421 0410 0426 0418 042f 0418 041c 0418 0422 0418 0420 041e 0412 0410 041d 041d 042b 0425 0420 0410 0414 0418 041e 0410 041a 0422 0418 0412 041d 042b 0425 041e 0422 0425 041e 0414 041e 0412 0412 042b 0421 041e 041a 041e 0419 0410 041a 0422 0418 0412 041d 041e 0421 0422 0418 0421 0422 0415 041a 041b 041e 041e 0411 0420 0410 0417 041d 042b 041c 0418 0422 0412 0415 0420 0414 042b 041c 0418 0412 0415 0429 0415 0421 0422 0412 0410 041c 0418 ; Fijacion de Desechos Simulados de Elevada Radiactividad en Solidos Vitreos

    Energy Technology Data Exchange (ETDEWEB)

    Clark, W. E.; Godbee, H. W. [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1963-02-15

    -processa'' (aljuminij, HNO{sub 3}) i ''Dareks-processa'' (nerzhavejushhaja stal', HNOa) pokazali tehnologicheskuju vypolnimost' takogo processa. Plotnye mikrokristallicheskie tverdye veshhestva mogut byt' stol' zhe priemlemymi, kak istinnye stekla; ih bol'shaja teploprovodnost' v nekotoroj mere vozmeshhaet uvelichenie poverhnosti po sravneniju s istinnymi steklami. V laboratorii byli izgotovleny fosfatnye i borfosfatnye stekla iz othodov vseh jetih treh vidov. Letuchest' cezija byla ogranichena do -v0,1% za schet fizicheskogo uvlechenija, a letuchest' rutenija byla snizhena do <0,3% dobavleniem fosfita i gipofosfita. Drugimi dobavochnymi veshhestvami sluzhili: PbO, Ca (OH){sub 2}, NaOH i MgO. Udel'nyj ves massy izmenjalsja ot 2,36 do 2,90 g/cm{sup 3} dlja othodov 'TBF-25-processa' i ot 2,63 do 2,60 g/smje dlja othodov {sup P}ureks-processa{sup .} Ob{sup e}m umenyvaloja po sravneniju s ishodnymi ob{sup e}mami koncentrirovannyh rastvorov othodov v pervom sluchae v 7,2 - 9,3 raza i vo vtorom sluchae v 5,7 - 8,3 raza; tochki nachal'nogo razmjagchenija izmenjalis' sootvetstvenno ot 675 do 1 000 Degree-Sign C i ot 830 do 975vS. Rezul'taty opytov o othodami 'Dareks-processa' vse eshhe nosjat predvaritel'nyj harakter. V rezul'tate polunepreryvnogo processa v poluproizvodstvennom masshtabe poluchalis' istinnye stekla iz othodov ''TBF-25-processa'' i mikrokristallicheskoe tverdoe veshhestvo iz othodov {sup P}ureks- processa{sup .} Teploprovodnost' stekla izmenjalas' ot 1,05 britanskih termicheskih edinic v chas na fu*g i na 1 Degree-Sign F pri 320 Degree-Sign F do 1,6 pri 1 050 Degree-Sign F, t.e. ona v 10 raz prevyshala teploprovodnost' obzhigaemogo veshhestva bez dobavok. Blagodarja dobavleniju fosfita letuchest' rutenija snizhalas' do <10%. Nerzhavejushhaja stal' javljaetsja udovletvoritel'nym materialom dlja izgotovlenija kontejnerov dlja obzhiganija i fiksacii. Pochti vsja vnutrennjaja korrozija proishodit v techenie otnositel'no korotkogo perioda vremeni (2-6 chasov), v techenie kotorogo

  6. The Design and Performance of a Large High resolution Focusing Collimator; Etude d'un Grand Collimateur a Focalisation et Fort Pouvoir de Resolution: Resultats; Konstruktsiya i kharakteristika krupnogo fokusiruyushchego kollimatora s vysokoj stepen'yu razresheniya; Diseno y Funcionamiento de un Gran Colimador Enfocado de Alto Poder de Resolucion

    Energy Technology Data Exchange (ETDEWEB)

    Harris, C. C.; Bell, P. R.; Satterfield, M. M.; Ross, D. A.; Jordan, J. C. [Oak Ridge National Laboratory, TN (United States)

    1964-10-15

    udlinennogo svincovogo kollimatora nanosit ushherb osnovnym konstrukcionnym celjam iz - z a uvelichenija skorosti sch et a , esli ne ispol'zuetsja takzhe krupnyj det ek tor. Avtory sproektirovali i sozdali svincovyj kollimator s 91 otverstiem dlja ispol'zovanija s d et ektorom NaJ (T 1 ) r a zm er om 13,5 h 7,5 s m . Fokus nahoditsja na rasstojanii 24 sm ot d et ek tora , a prostranstvennyj ugol vosprijatija analogichen uglam fokusirujushhih kollimatorov pri odnovremennom ispol'zovanii ih s detektorami na 7,5 sm . Maksimal'naja dlina sostavlja et 16,5 sm ; obychnaja dlina konstrukcii sost avlja et 14 sm . Pri dannyh velichinah dliny opticheskie ''okruzhnosti razreshenija'' sostavljajut sootvetstvenno 1,2 i 0,77 sm . Jeti konstrukcii dajut sledujushhee: 1 . Bol e e dlinnoe fokusnoe r a s stojan i e s odn o vremennym uvelicheniem jeffektivnosti scheta blagodarja b ol e e krupnomu ljuminoforu. 2 . Svincovyj kollimator s razreshajushhej sposobnost'ju, kotoruju mozhno sravnit' s bolee korotkimi kollimatorami iz zolot a (skennogramma t ochechnogo istochnika C s-V a 137 imeet di ametr v sego 7 m m ) . 3. Kollimator s vysokoj stepen'ju razreshenija dlja skennirovanija chelovecheskogo organizma i melkih zhivotnyh. 4. Osnovnaja konstrukcija sborki dlja ispol'zovanija kollimatorov s bolee krupnym prostranstvennym uglom dlja uvelichenija jeffektivnosti scheta. Polucheny skennogrammy v sego organizma s primeneniem zolota -198 i jod a -131. Obnaruzhena vozrosshaja jeffektivnost' i razreshenie 14-sm kollimatora. Na skennogramme sobaki s 16,5 sm kollimatorom horosho vidna koncentracija aktivnosti, imejushhaja, ochevidno, v Diametre menee 6m m; aktivnost',lish' v 5 raz prevyshajushhaja ''fon organizma'', vse zhe byla chetko otdelena rasstojaniem 6 mm ot istochnika diametrom 1,8 sm s bolee vysokim (v 50 raz) urovnem aktivnosti. (author)

  7. Reactor Physics Development for Advanced Gas-Cooled Reactors; Recherches en Physique des Reacteurs, pour des Reacteurs Perfectionnes Refroidis par un Gaz; Razrabotka metodov v oblasti reaktornoj fiziki dlya usovershenstvovannogo reaktora s gazovym okhlazhdeniem; Progresos de la Fisica de los Reactores de Tipo Avanzado Refrigerados por Gas

    Energy Technology Data Exchange (ETDEWEB)

    Moore, J. [United Kingdom Atomic Energy Authority (United Kingdom)

    1964-04-15

    reshetki dlja reaktora AGR i proverki teoreticheskih metodov, razrabotannyh dlja geterogennyh aktivnyh zon reaktorov, ispol'zovalis' kriticheskaja ustanovka APEX i reaktor nulevoj moshhnosti HERO s obychnymi raspolozhenijami reshetok , i kombinacijami izmenjajushhih rabotu reaktora jelementov, naprimer regulirujushhih sterzhnej. Teoreticheskie metody, razrabotannye i primenjavshiesja do nastojashhego vremeni, izvestny kak ''getrekontrol'' i FTD2. Jeksperimenty imeli cel'ju podrobno proverit' osobennosti jetih metodov, i dlja opredelenija soglasovannogo mezhdu soboj rjada konstant reshetki, sootvetstvujushhih rezul'tatam jeksperimentov, byli proanalizirovany rezul'taty izmerenij, vypolnennyh na rjade ''reaktornyh'' aktivnyh zon razlichnogo razmera v ustanovkah APEX i HERO. Jeti chisto jempiricheskie konstanty byli zatem ispol'zovany v metodah getrekontrol' i FTD2 dlja uspeshnogo planirovanija vvoda v jekspluataciju i vybora vida nagruzki dlja Uindskejlskogo AGR. Daetsja ssylka na jeksperimental'nye metody, kotorye byli provereny ilj special'no razrabotany dlja reshenija vstretivshihsja problem. Osobyj interes predstavljajut metody, ispol'zovavshiesja dlja izmerenija jeffektov reaktivnosti v reaktorah APEX, HERO i AGR i dlja opredelenija dannyh tonkoj struktury i raspredelenija jenergij v slozhnyh toplivnyh sborkah. Osushhestvljaemye v nastojashhee vremja teoreticheskie raboty skoncentrirovany, glavnym obrazom, na razrabotke al'ternativnogo metoda v otnoshenii ''getrekontrolja'' i FTD2 dlja rascheta aktivnyh zon reaktora posle znachitel'nogo vygoranija topliva. Na jetom zhe budut skoncentrirovany raboty i v budushhem. Zadachej programmy jeksperimentov na ustanovke HERO javljaetsja ispytanie jetih metodov na slozhnyh aktivnyh zonah, vkljuchaja aktivnye zony s toplivom, proizvodjashhim plutonij. Dopolnitel'nye dannye o vlijanii plutonija bydut polucheny blagodarja jekspluatacii reaktora AGR i fizicheskim izmerenijam obluchennogo topliva. (author)

  8. A Comparison of Radioisotope Methods for River Flow Measurement; Comparaison de methodes radioisotopiques de mesure du debit des cours d'eau; Sravnenie radioizotopnykh metodov izmereniya rechnykh stokov; Comparacion de los metodos radioisotopicos para medir el caudal de los rios

    Energy Technology Data Exchange (ETDEWEB)

    Clayton, C. G.; Smith, D. B. [Wantage Research Laboratory Atomic Energy Research Establishment Wantage, Berks (United Kingdom)

    1963-08-15

    indikatornykh metodov izmereniya stoka rasstoyanie mezhdu tochkoj izmereniya i tochkoj vvedeniya indikatora dolzhno byt' dostatochno bol'shim, poskol'ku dolzhno proizojti polnoe smeshivanie. V to zhe vremya ehto rasstoyanie ne dolzhno byt' slishkom bol'shim, chtoby izbezhat' znachitel'noj prodol'noj dispersii ili poteri indikatora v rezul'tate pogloshcheniya ego dnom reki. Dispersiya zavisit ot gidravlicheskikh kharakteristik stoka, i ona kharakterna dlya ehtogo metoda. Pogloshchenie zavisit ot vybora indikatora i ot geologicheskoj prirody dna reki. Imenno s ehtoj tochki zreniya N{sup 3} yavlyaetsya ideal'nym indikatorom, poskol'ku on ne pogloshchaetsya. Odnako ego trudno izmeryat', i ego prokhozhdenie v reke ne mozhet byt' proslezheno neposredstvenno. Drugie indikatory bolee udobny, no oni mogut pogloshchat'sya. Stepen' pogloshcheniya Na{sup 24},Br{sup 82} i R{sup 32} v vide NaHC0{sub 3}, NH{sub 4}Br i NaN{sub 2}R0{sub 4} izuchalas' putem sravneniya dannykh izmerenij v neskol'kikh tochkakh vniz po techeniyu o obshchej tochki vvedeniya i putem vvedeniya mechennoj tritiem vody (NTO) odnovremenno s vvedeniem kazhdogo iz trekh indikatorov. Ustanovleno, chto R{sup 32}, kotoryj, kak ozhidalos', budet sil'no pogloshchat'sya khimicheski, yavlyaetsya na samom dele neprigodnym v kachestve indikatora bez nositelya dlya izmereniya rechnykh stokov, khotya s nositelem oshibka izmerenij znachitel'no men'she. Na{sup 24} i Br{sup 82} ne proyavlyayut priznakov pogloshcheniya ikh na znachitel'nykh rasstoyaniyakh, bol'she chem neobkhodimo dlya gorizontal'nogo smeshivaniya; na rasstoyanii svyshe 660 m v reke s samym medlennym techeniem obnaruzhivayutsya priznaki ischeznoveniya Na{sup 24}. Predstavleny nekotorye nablyudeniya otnositel'no stepeni gorizontal'noj i prodol'noj dispersii, kotoraya otrazhaetsya na obshchem primenenii indikatornykh metodov dlya izmerenij rechnykh stokov. Delaetsya vyvod, chto vse tri metoda mogut uspeshno primenyat'sya. Odnako metod nepreryvnogo otbora prob v konechnom

  9. High-Dose Ionizing Radiation Photographic Dosimetry; Mesure, par des Methodes Photogra Phiques, de Doses Elevees de Rayonnements Ionisants; 0424 041e 0422 041e 0413 0420 0414 ; Dosimetria Fotografica de Dosis Elevadas de Radiaciones Ionizantes

    Energy Technology Data Exchange (ETDEWEB)

    Trousil, J.; Bucina, I. [Institute for Research Production and Application of Radioisotopes Prague, Czechoslovakia (Czech Republic)

    1965-06-15

    sobre las emulsiones rapidas y lentas con elevada concentracion de plata. En las emulsiones que se usan para la medicion de dosis elevadas y que se revelan en presencia de retardadores, se ha determinado la influencia ejercida por la energia y la atenuacion de la imagen latente sobre la precision de las determinaciones. Por ultimo, se describen los errores de la evaluacion fotografica de dosis elevadas hallados aplicando metodos estadisticos al analisis de los resultados experimentales. Se examina tambien el incremento del error en las regiones de debil y fuerte ennegrecimiento. Tambien se consideran los errores debidos a la calibracion de los aparatos, la influencia de la energia, la atenuacion de la imagen latente, el tratamiento quimico y la medicion del ennegrecimiento. La hipotesis de que la dosis medida con dosimetros de pelicula corresponde a la dosis recibida por el organismo entero, constituye un error que no se toma en consideracion. (author) [Russian] V jetoj rabote opisyvaetsja fotograficheskaja dozimetrija ionizirujushhej radiacii v diapazone ot 10 millirad do 1000 rad (dlja gamma-izluchenija bolee vysokoj intensivnosti). Pri jetom metode ispol'zujutsja dve fotoplenki s razlichnoj jemul'siej, kotorye odnovremenno pomeshhajut v odin i tot zhe plenochnyj dozimetr. Sushhestvennoj chertoj jetogo metoda javljaetsja to, chto dozy v vysheprivedennom diapazone mogut byt' opredeleny bez znanija o tom, chto imelo mesto obluchenie bol'shimi dozami, s tochnost'ju luchshej chem {+-}25%v predelah vsego diapazona doz (doveritel'nyj interval 95%), a takzhe to, chto jenergiju obluchenija v plenke mozhno opredelit' s horoshej approksimaciej. Rassmatrivajutsja pribory, vidy plenok i himicheskaja obrabotka, kotorye pozvoljajut proizvodit' jeti izmerenija. Opisyvaetsja princip izgotovlenija densitometra, s pomoshh'ju kotorogo mozhno izmerit' potemnenie fotoplenki s odinakovoj tochnost'ju v diapazone ot D = 0 do D = 6. Takim putem mozhno ispol'zovat' vsju oblast' imejushhegosja

  10. The Role of Free-Radicals in the Radiation Vulcanizing of Elastomers; Role des radicaux libres dans la vulcanisation radiochimique des elastomeres; O roli svobodnykh radikalov v protsesse radiatsionnoj vulkanizatsii ehlastomerov; Papel de los radicales libres en la radiovulcanizacion de los elastomeros

    Energy Technology Data Exchange (ETDEWEB)

    Kuz' minskij, A. S.; Fedoseeva, T. E.; Chertkova, V. F.

    1963-11-15

    razmorazhivanii do +20{sup o}C na 1,5 - 2 poryadka. Kontsentratsiya ostavshikhsya radikalov pri +20{sup o}C v kristallizuyushchikhsya i regulyarnykh kauchukakh neskol'ko vyshe predela chuvstvitel'nosti sovremennykh priborov EHPR, a v amorfnykh, atakicheskikh polimerakh - nizhe ehtogo predela. Takoe umej'shenie kontsentratsii obuslovleno pri temperaturakh nizhe Tg - rekombinatsiej radikalov v ''kletke'', a v oblasti temperatur steklovaniya razmorazhivaniem segmentantnogo dvizheniya molekulyarnykh tsepej. Sozdanie prostranstvennoj setki snizhaet skorosti rekombinatsii radikalov pri razmorazhivanii i uvelichivaet vremya zhizni ehtikh radikalov pri T=20{sup o}C. Izuchen protsess gibeli radikalov v sshitom polibutadiene s razlichnym chislom poperechnykh svyazej v intervale temperatur ot -196 do +100{sup o}C. Ustanovleno, chto skorost' gibeli svobodnykh radikalov zavisit ot plotnosti prostranstvennoj setki i nepostoyanna dlya odnogo i togo zhe chisla poperechnykh svyazej. (author)

  11. Release of Fission Products from UC-ZrC Fuel Inserts; Degagement des produits de fission liberes dans des noyaux combustibles UC-ZrC; Vydelenie produktov deleniya iz topliv UC - ZrC; Liberacion de productos de fision por pastillas de combustible de UC-ZrC

    Energy Technology Data Exchange (ETDEWEB)

    Barth, F.; Von der Decken, C. B.; Schifferstein, K. [Brown Boveri/Krupp Reaktorbau G.M.B.H., Duesseldorf (Germany); Clauss, A.; Reichel, H.; Rygaert, J.; Ruston, W. R. [Societe d' Etudes de Recherches et d' Applications pour l' Industrie (S.E.R.A.I.), Brussels (Belgium)

    1963-11-15

    reaktora. Krome togo sushchestvovala vozmozhnost' otdel'nogo izmereniya doli otdachi {epsilon}{sub R} , esli toplivnaya serdtsevina byla podveshana v pechi s bol'shim diametrom. Izmerennye velichiny {epsilon}{sub R} lish' neznachitel'no prevyshali vychislennye. Pri bolee vysokikh temperaturakh obraztsa mozhno bylo vychislit' dolyu diffuzii {epsilon}{sub D} vychitaniem doli otdachi iz polnogo vydeleniya. Poluchiv {epsilon}{sub D}, mozhno vychislit' D/r{sub 0}''2 sek, upotreblyaya uravneniya priblizheniya S. Flyugge i K.EH.Tsimensa, gde D - konstanta diffuzii, r{sub 0} rasschitannyj matematicheskim putem srednij radius chastitsy. Grafik zavisimosti logarifma ehtikh velichin ot 1/T daet ehnergiyu aktivatsii (T - temperatura obraztsa, {sup o}K). Raznitsa mezhdu ehnergiyami aktivatsii diffuzii kriptona i ksenona'okaehalas' neznachitel'noj. Malo otlichalis' drug ot druga takzhe i ehnergii aktivatsii, opredelennye dlya razlichnykh tipov tabletok, nesmotrya na to, chto velichiny D/r{sub 0}{sup 2} v nekotorykh sluchayakh pri tekh zhe temperaturakh obraztsa razlichalis' na 4 poryadka. V grafite kapsul posle oblucheniya byli opredeleny aktivnosti izotopov I{sup 131}, Sr{sup 85}, Ba{sup 140} i Ce{sup 141}. 3a isklyucheniem I{sup 131}, aktivnosti byli vyshe ozhidaemykh dlya vydeleniya tol'ko za schet otdachi. Velichiny dlya Sr{sup 85}, Ba{sup 140}, i Ce{sup 141} byli slishkom veliki, chtoby ikh mozhno bylo ob{sup y}asnit' diffuziej sootvetstvuyushchikh im inertnykh gazov-predshestvennikov. Predpolagaetsya, chto izmerennye izotopy ili ikh neinertnye gazy-predshestvenniki vedelyayutsya putem diffuzii. (author)

  12. Applications of Fluorine-18 in Biological Studies with Special Reference to Bone and Thyroid Physiology; Emploi du Fluor-18 dans des Études Biologiques, Notamment sur la Physiologie des Os et de la Thyroïde; ИСПОЛЬЗОВАНИЕ ФТОРА-18 В БИОЛОГИЧЕСКИХ ИССЛЕДОВАНИЯХ С УДЕЛЕНИЕМ ОСОБОГО ВНИМАНИЯ ВОПРОСАМ ФИЗИОЛОГИИ КОСТЕЙ И ФИЗИОЛОГИИ ПИТОВИДНОЙ ЖЕЛЕЗЫ; Aplicaciones del Fluor-18 en Estudios Biologicos, con Especial Referencia a la Fisiologia del Esqueleto y de la Tiroides

    Energy Technology Data Exchange (ETDEWEB)

    Anbar, M. [Weizmann Institute of Science (Israel); IAEC Soreq Research Establishment, Rehovot (Israel)

    1963-03-15

    , chto fiziologicheskoe povedenie F{sup -} vo mnogom analogichno povedeniju kal'cija; okazalos', chto nakoplenie R {approx} v kostjah uvelichivaetsja pod vlijaniem vitamina D i teosterona, v to vremja kak kortizon i jestrogeny umen'shajut stepen' nakoplenija ftora. Pri vvedenii ftora v vide kationnogo kompleksa harakter ego raspredelenija v organizme izmenjalsja. Bylo ustanovleno, chto mechennye F{sup 18}YF{sup ++} i ZF{sup +3} podchinjajutsja pravilam raspredelenija ishodnyh kationov. Bylo pokazano, chto iony ftoroboratov nakaplivajutsja v shhitovidnoj zheleze v kolichestve, sravnimom s nakopleniem ionov ioda. Iony ftoroboratov ne vstupajut v kakie-libo organicheokie svjazi v shhitovidnoj zheleze, i ih pogloshhenie javljaetsja specificheskim pokazatelem funkcii stadii zahvata dlja zhelezy. Ftoroboraty, mechennye R1v primenjajutsja d.;ja reshenija razlichnyh problem fiziologii shhitovidnoj zhelezy. Pokazano, chto TSH umen'shaet pogloshhenie BF; v pervye neskol'ko chasov posle vvedenija i uvelichivaet cherez 24 chasa. BF{sub 4}{sup -} okazyval takoe zhe tormozjashhee dejstvie na process pogloshhenija joda, kak i zhelezo, med', cink, kadmij, ftoristme soedinenija, tiocianat i drugie ionm, chto ukazyvaet na narushenie' fazy zahvata. Pri provedenii analogichnoj serii opytov bylo obnaruzheno, chto soedinenija, soderzhashhie sul'fgidril'nye gruppy, ravno kak i iony azida, uvelichivajut zahvat vtoro- boratov, hotja i umen'shajut obshhee pogloshhenie joda. Dalee, bylo pokazano, chto v faze zahvata chuvstvitel'nost' k oblucheniju znachitel'no men'she, chem v stadijah obrazovanija i vydelenija tiroksina. Ftoroboraty, mechennye F{sup 18}, shiroko primenjalis' dlja opredelenija lokalizacii mozgovyh opuholej o pomoshh'ju napravlennogo skanniruhvcego ustrojstva na sovpadenijah, vvidu ogranichennoj pronicaeyooti Dlja jetih ionov nepovrezhdennogo gematojencefalicheskogo bar'era. Byod polucheny i primenjalis' v issledovanijah fiziologii kostej ftoroaromaticheskie komplekso- obrazuhhcie

  13. Application of Sodium-24 to Flow-Rate Measurements and Leak Detection; Applications du Sodium-24 a des Mesures de Debits et de Recherches de Fuites; ИСПОЛЬЗОВАНИЕ НАТРИЯ-24 ПРИ ИЗМЕРЕНИЯХ ПОТОКОВ И ИССЛЕДОВАНИЯХ УТЕЧКИ; Aplicaciones del Sodio-24 a la Medicion de Caudales y Deteccion de Escapes

    Energy Technology Data Exchange (ETDEWEB)

    Guizerix, J.; Cornuet, R. [Centre d' Etudes Nucleaires, Grenoble (France)

    1963-03-15

    , predvaritel'no provedennoe issledovanie pozvolilo ustanovit' vremja maksimal'nogo probega radioaktivnyh voln v kazhdoj iz jetih sistem. Iz jetogo byl sdelan vyvod o tom, chto dannaja utechka mozhet byt' vyjavlena putem in{sup e}ktirovanija v vodjanuju sistemu 15 millikjuri natrija-24, i izvlechenija 3 l acetata v techenie 20 min. Chislo otschetov jetoj aktivnosti, otnesennoe k polnoj aktivnosti in{sup e}ktirovannoj vody, kotoraja podschityvalas' pri toj zhe geometrii, pozvoljaet opredeljat' utechku. Dlja izmerenija potoka vody v zamknutoj sisteme byl primenen {sup m}etod dvuh maksimumov{sup ;} cirkuljacija bila osushhestvlena pri pomoshhi termosifona, rabotajushhego pri temperature 350 Degree-Sign S i davlenii 180 kg/cm{sup 2}. Byla primenena kvazitochechnaja in'ekcija natrija-24 (0,5 millikjuri) v vide karbonata; pri jetom izmerenie vremeni probega radioaktivnoj volny mezhdu dvumja kollimirovannymi scintillja- cionnymi detektorami pozvolilo opredelit' potok s otnositel'noj tochnost'ju, primerno ravnoj 2%. (author)

  14. Thermodynamic Behaviour of Hypostoichiometric UO{sub 2}; Comportement Thermodynamique de UO{sub 2} HypostoeChiometrique; Termodinamicheskoe povedenie gipostekhiometricheskoj UO{sub 2}; Comportamiento Termodinamico del UO{sub 2} Subestequiometrico

    Energy Technology Data Exchange (ETDEWEB)

    Aitken, E. A.; Brassfield, H. C.; Fryxell, R. E. [General Electric Company, Nuclear Materials and Propulsion Operation, Cincinnati, OH (United States)

    1966-02-15

    nagrevajutsja do temperatury svyshe 1 700 Degree-Sign S, otnoshenie o/i tab- letki menjaetsja i dostigaet ravnovesija, opredeljaemogo aktivnost'ju kisloroda atmosfery, okruzhajushhej obolochku. UO{sub 2} ne reagiruet s tantalom, noiz-zavysokoj rastvorimosti kislo- roda v tantale poslednij igraet rol' membrany. Ispol'zuja dannye kongrujentnogo vypari- vanija i opytov s tantalovoj obolochkoj, provedennyh v razlichnyh smesjah argon - vodorod, byla opredelena aktivnost' kisloroda v okisi urana kak funkcija stehiometrii. Chastichnaja moljarnaja svobodnaja jenergija kisloroda G(O{sub 2}) vozrastaet pochti linejno pri nedostatke kislo- roda s vozrastaniem otnoshenija kislorod-uran. Kogda sostav priblizhaetsja k stehiometri- cheskomu, velichina G(O{sub 2}) rastet ochen' rezko. Ispol'zuja jeti rezul'taty vmeste s ocenochny- mi velichinami G(O{sub 2}) pri izbytke kisloroda, vzjatymi iz literatury, pokazano, chto dannye pri opredelennoj temperature soglasujutsja so staticheskoj model'ju. Jeta model' dopuskaet, chto otklonenie ot stehiometricheskogo sostava proishodit i z-zaizbytka atomov kisloroda, zanimajushhih mezhdouzlija, ili i z - z a nedostatka kisloroda na kislorodnoj podreshetke. Razu- porjadochenie proishodit s vnutrennimi atomami kisloroda i s kislorodnymi vakansijami. Jenergiju kisloroda po Frenkelju sostavljaet 60 kkal/gramm-atom, chto horosho soglasuetsja s ocenkami, poluchennymi iz dannyh kislorodnoj samodiffuzii. Rassmatrivaetsja svjaz' mezhdu G(O{sub 2}) I chastichnym davleniem gazoobraznyh okisej, UO i UO{sub 2} i v obshhem plane kommentirujut- sja rezul'taty opytov s drugimi soedinenijami, takimi kak ThO{sub 2} provedennyh s ispol'zova- niem teh zhe jeksperimental'nyh metodov. (author)

  15. The use of oxygen-14 in the study of positron polarization in a Fermi-type transition; Emploi de l'oxygene-14 pour l'etude de la polarisation des positions dans une transition du type Fermi; Ispol'zovanie kisloroda-14 dlya issledovaniya polyarizatsii pozitronov v prevrashcheniyakh tipa Fermi; Empleo del oxigeno-14 en el estudio de la polarizacion de los positrones en una transicion de tipo Fermi

    Energy Technology Data Exchange (ETDEWEB)

    Schmidt, F H; Gerhart, J B; Hopkins, J C; Bichsel, H; Stroth, J [University of Washington, Seattle, WA (United States)

    1962-01-15

    , prokhodit cherez chetnoe sostoyanie, perekhodit k drugomu nulevomu spinu i prevrashchaetsya v N{sup 14} v vozbuzhdennom chetnom sostoyanii. Poehtomu raspad proiskhodit tochno po tipu Fermi. Kislorod O{sup 14} byl poluchen reaktsiej N{sup 14} (p, n) O{sup 14} v 60-dyujmovom tsiklotrone Vashingtonskogo universiteta s postoyannym potokom azota N{sub 2}. K N{sub 2} byl dobavlen nositel' O{sub 2} v gazoobraznom vide. Posle aktivizatsii gaz propuskalsya cherez sootvetstvuyushchie fil'try dlya udaleniya nezhelatel'noj aktivnosti i dlya obespecheniya soedineniya kisloroda s vodorodom. Aktivizirovannye vodyanye pary zakhvatyvalis' pri temperature zhidkogo azota N{sub 2} i ulavlivalis' na mednuyu palochku dlya obrazovaniya sil'nogo (okolo 10 millikyuri) postoyannogo istochnika 72-sekundnogo kisloroda O14. Obrazuyushchiesya pri raspade pozitrony analizirovalis' s tochki zreniya ikh ehnergii v nebol'shom magnitnom spektrometre. Dva metoda byli ispol'zovany dlya izucheniya prodol'noj polyarizatsii vykhodyashchikh iz spektrometra pozitronov. V pervom iz nikh pozitrony popadali v plasticheskij stsintillyator, gde nekotorye iz nikh unichtozhalis' na letu. Annigiliruyushchijsya kvant bolee vysokikh ehnergij polyariziruetsya vrashchatel'no v tom zhe samom napravlenii, chto i pervonachal'nye pozitrony. EHti gamma-luchi rasseivalis' iz namagnichennogo zheleza po Komptonu i podschityvalis' pri pomoshchi stsintillyatsionnogo schetchika s Nal(T). Assimetrichnost' poperechnogo secheniya rasseivaniya v zavisimosti ot napravleniya namagnichivaniya svyazana s pervonachal'noj stepen'yu polyarizatsii pozitronov. Vo vtorom metode pozitrony sosredotochenno napravlyalis' na namagnichennuyu zheleznuyu fol'gu. Poperechnoe sechenie rasseivaniya pozitronov-ehlektronov ili rasseivaniya Baba zavisit ot napravleniya namagnichivaniya zheleznoj fol'gi po otnosheniyu k polyarizatsii pozitronov. Rasseyannye ehlektrony i pozitrony obnaruzhivalis' pri pomoshchi plasticheskikh stsintillyatsionnykh schetchikov

  16. Nuclear Materials Management and its Relationship to Nuclear Safety and Criticality Control; La Gestion des Matieres Nucleaires et ses Rapports avec la Securite Nucleaire et le Controle de la Criticite; Obrashchenie s yadernymi materialami i ego svyaz' s yadernoj bezopasnost'yu i kontrolem nad kritichnost'yu; La Administracion de Materiales Nucleares y sus Relaciones con la Seguridad Nuclear y el Control de la Criticidad

    Energy Technology Data Exchange (ETDEWEB)

    Tingey, F. H. [Phillips Petroleum Company, Idaho Falls, ID (United States)

    1966-02-15

    materiales nucleares debe ser exacta y precisa. Es necesario seguir una politica rigida de administracion de existencias a fin de limitar los problemas que suscita la acumulacion de materiales fisionables. La comprobacion interna de las existencias por el personal de los servicios de administracion puede servir tambien para verificar si se aplican los procedimientos de salvaguardia. Este personal puede llevar a cabo una importante labor de orientacion informando a los encargados de manipular los materiales fisionables sobre los peligros que sus actividades implican. La orientacion de los servicios de administracion de materiales nucleares hacia los problemas relativos a la prevencion de la criticidad aumenta considerablemente la eficacia de las inspecciones. (author) [Russian] Dlja vseh, aktivno rabotajushhih v oblasti jadernoj promyshlennosti, chrezvychajno vazhno ne dopuskat' sozdanija takih uslovij, kotorye mogli by privesti k nepredusmotrennomu skopleniju rasshhepljajushhih materialov v takih kolichestvah, geometrii i okruzhenii, kotorye mogut vyzvat' cepnuju reakciju nejtronov. Jeto osobenno vazhno dlja teh, na kom lezhit otvetstvennost' za pogruzochno-razgruzochnye raboty, peremeshhenie i hranenie rasshhepljajushhihsja materialov v hode vypolnenija razlichnyh zadanij. Jeti-zhe lica vhodjat v sistemu administrativno-hozjajstvennogo ucheta jadernyh materialov. Na objazannosti jetih lic lezhit v pervuju ochered' otvetstvennost' za sostavlenie i poluchenie dannyh statisticheskoj otchetnosti, napravljaemyh cherez Upravlenie po administrativnohozjajstvennomu uchetu jadernyh materialov, i v kachestve takovyh pri vypolnenii svoih objazannostej oni dolzhny obrashhat'sja v ukazannoe Upravlenie za predostavleniem im pravil'noj i svoevremennoj informacii. V osnovnom otvetstvennost' za nedopushhenie nepredusmotrennoj kritichnosti v ljuboj zone jekspluatacii ustanovki lezhit na rukovoditele rabot. Pri vyrabotke predupreditel'nyh meroprijatij sleduet uchityvat' po men'shej mere tri

  17. Plasma Equilibrium in a Torus with High-Frequency Fields and Plasma Heating Resulting from the Development of a Powerful Beam of ''Escaping Electrons''; Plasma Torique: Stabilisation au Moyen de Champs de Haute Frequence et Chauffage par Formation d'un Flux Intense d'Electrons 'Emballes'; Ehksperimental'noe issledovanie ravnovesiya plazmy v tore pri nalichii vysokochastotnykh polej i nagreva plazmy za schet razvitiya moshchnogo puchka ''ubegayushchikh ehlektronov''; Equilibrio del Plasma en un Toro, en Presencia de Campos de Alta Frecuencia, y Calentamiento del Plasma por el Desarrollo de un Haz Potente de 'Electrones Desbocados '

    Energy Technology Data Exchange (ETDEWEB)

    Demirkhanov, R. A.; Kirov, A. G.; Stotland, M. A.; Malykh, N. I.; Horasanov, G. L.; Vishnevskij, N. K.; Gutkin, T. I.; Jampol' skij, I. R. [Fiziko-Tehnicheskij Institut Gosudarstvennogo Komiteta po Ispol' zovaniju Atomnoj Ehnergii SSSR, Sukhumi, SSSR (Russian Federation)

    1966-04-15

    razvertka svechenija plazmy vo vremeni s pomoshh'ju jelektronno- opticheskogo preobrazovatelja; v) izmerenija povedenija (polnoj intensivnosti rentgenovskogo izluchenija vo vremeni s pomoshh'ju scintilljacionnogo schetchika; g) izmerenie toka v plazme i naprjazhenija na obhode. Rezul'taty jeksperimentov pokazyvajut, chto podzhigajushhee vysokochastotnoe pole s chastotoj f = 8,3 Mgc), sozdaet plazmu, kasajushhujusja stenok, so srednej plotnost'ju P{sub e} = 5 * 10{sup 12} * 10{sup 13} sm{sup -3} i jelektronnoj temperaturoj porjadka neskol'kih jelektronvol't. Pri nalozhenii na jetu plazmu vrashhajushhegosja kvadrupol'nogo vysokochastotnogo polja plazma otzhimaetsja ot stenok, lokalizuetsja v centre i temperatura ee uvelichivaetsja. Issledovalsja rezhim nagreva'sil'nym jelektricheskim polem v otsutstvie vrashhajushhegosja vysokochastotnogo kvadrupol'nogo polja. V jetom sluchae, kogda jelektricheskoe pole ravno E{sub z} = 100 * 200 v/sm v plazme razvivaetsja tok Jp =3 * 5 ka, kotoryj imeet sushhestvenno omicheskij harakter pri sil'nom zatuhanii. V to zhe vremja naprjazhenie na obhode takzhe ves'ma sil'no zatuhaet po sravneniju s holostym hodom, chto ukazyvaet na jeffektivnoe pogloshhenie jEhnergii kontura plazmoj. Velichina jEhnergii, pogloshhennoj plazmoj v techenie pervogo poluperioda toka, t.e. za vremja okolo 1 mksek, sostavljaet primerno 20 dzh; pri jetom okazyvaetsja, chto provodimost' plazmy anomal'no mala. V rezhime nagreva sil'nym jelektricheskim polem nabljudaetsja intensivnaja vspyshka rentgenovskogo izluchenija s jenergiej porjadka 100 kjev, a takzhe izluchenie mikrovolnovyh shumov na chastotah blizkih k plazmennoj. (author)

  18. The Cobalt-60 Research Facility at Seibersdorf; L'Installation de Recherche sur l'Iradiation au {sup 60}Co de Seibersdorf; Obluchayushchaya ustanovka s istochnikom Kobal'ta-60 reaktornogo tsentra v Zajbersdorfe; La Instalacion Experimental de {sup 60}Co de Seibersdorf

    Energy Technology Data Exchange (ETDEWEB)

    Weidinger, N.; Kaindl, K. [Institute Of Biology And Agriculture, Reactor Centre, Seibersdorf (Austria)

    1966-11-15

    ' sterzhnej s vneshnej dlinoj v 250 mm mogut vvodit'sja poodinochke s pomoshh'ju kabelja tipa Telefleks. Oni mogut byt' ostanovleny v ljubom zhelaemom polozhenii, izmerjaemom po otnosheniju k vhodu v kameru. Dlja'nabljudenija za opytami ustanovlen monokuljarnyj periskop. Pomeshhenie kontroliruetsja pri temperature ot -18sS do +35 Degree-Sign S s tochnost'ju {+-}1 Degree-Sign S. Cherez betonnyj jekran prohodjat neskol'ko trubok diametrom do 300 mm, kotorye sluzhat dlja propuskanija trosov i jeksperimental'nyh trubok. Vremja obluchenija mozhet ustanavlivat'sja s pomoshh'ju otdel'nogo tajmera, pozvoljajushhego ubirat' istochniki v nerabochee polozhenie posle obluchenija, ili zhe naoborot vydvigat' ih dlja obluchenija posle prohozhdenija opredelennogo promezhutka vremeni, v zavisimosti ot trebovanij. Vsja ustanovka avtomaticheski kontroliruetsja sistemoj blokirovki. Sistema radiacionnyh detektorov i mehanicheskih zaporov obespechivaet maksimal'nuju bezopasnost' ustanovki v sluchae avarii. Vse zazhnye bloki pitajutsja batareej s bufernym ustrojstvom s tem chtoby, dazhe v sluchae proboja, obespechit' nepreryvnuju rabotu. V sluchae vyhoda iz stroja vazhnyh komponentov ustanovki ili nepredvidennyh avarij srabatyvaet sistema signalizacii. V sluchae chrezvychajnoj opasnosti jeta sistema nemedlenno ubiraet istochniki v nerabochee polozhenie, a v sluchae nebol'shoj opasnosti - podnimaet ih naverh, posle chego operator reshaet, prodolzhat' obluchenie ili net. (author)

  19. Legislation and Identification of Irradiated Foodstuffs; Reglementation et Identification des Denrees Irradiees; Zakonodatel'stvo po obluchennym pishchevym produktam i metody ikh identifikatsii; Legislacion y'Identificacion de los Alimentos Irradiados

    Energy Technology Data Exchange (ETDEWEB)

    Lafontaine, A. [Institut d' Hygiene et d' Epidemiologie, Ministere de la Sante Publique, Bruxelles (Belgium)

    1966-11-15

    , zapreshhaetsja primenjat' radioaktivnye veshhestva k pishhevym produktam ili obrabatyvat' ih pri pomoshhi ionizirujushhih izluchenij. Uzhe v nastojashhee vremja stat'ja 65, podpunkty ai', predusmatrivaet otstuplenie ot vysheukazannogo pravila pri uslovii, chto primenenie takih veshhestv ili obrabotka imi budut osushhestvljat'sja v issledovatel'skih celjah i pri nalichii special'nogo razreshenija Ministerstva zdravoohranenija. Vvoz, hranenie i perevozka pishhevyh produktov, kotorye podvergalis' obrabotke radioaktivnymi veshhestvami, takzhe zapreshheny v silu stat'i 64,2. Analogichnye polozhenija prinjaty v otnoshenii medikamentov i medicinskogo oborudovanija, obrabatyvaemyh pri pomoshhi ionizirujushhih izluchenij. Tem ne menee v porjadke postepennogo predostavlenija bol'shoj svobody dopuskaetsja opredelennaja gibkost' v otnoshenii medicinskogo oborudovanija. Nesmotrja na to, chto nekotorye nauchnye krugi prodolzhajut somnevat'sja otnositel'no bezvrednosti obluchennyh pishhevyh produktov, predstavljaetsja verojatnym v nedalekom budushhem ispol'zovat' nekotorye metody. Nekotorye strany k tomu zhe uzhe dali razre- . shenie na potreblenie nekotoryh vidov obluchennyh pishhevyh produktov i mozhno predvidet', chto ih prodazha vyjdet za ramki nacional'nyh granic. Krome togo, neobhodimo obespechit' .takoe polozhenie, chtoby metody, kotorye byli odobreny, ne primenjalis' k produktam, dlja kotoryh oni ne predusmotreny, i chtoby sobljudalis' dopustimye dozy obluchenija. Takim obrazom, v nacional'nom i mezhdunarodnom plane voznikaet problema identifikacii obluchennyh produktov i vozmozhnogo opredelenija dozy obluchenija. Rassmotrenie perechnja vozmozhnyh metodov ukazyvaet na mnozhestvo sposobov podhoda k resheniju jetogo voprosa: izmerenie paramagnitnogo sostojanija atoma, jelektroforez, izmerenie potenciala okislitel'no-vosstanovitel'nogo processa, polarografija, spektro- fotometrija, hromatografija, kalorimetrija, mikroskopicheskoe izuchenie tkanej, immunologicheskie izmenenija

  20. Determination of Fallout Radionuclides in Environmental Samples by Gamma-Ray Spectrometry; Mesure Spectrometrique Gamma des Radionucleides de Retombee Presents dans des Echantillons du Millieu; Opredelenie radioizotopov radioaktivnykh osadkov v probakh iz okruzhayushchej sredy pri pomoshchi spektrometrii gamma-luchej; Determinacion, por Espectrometria Gamma, de los Radionuclidos de Precipitaciones en Muestras del Medio Ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Ward, G. M.; Johnson, J. E.; Wilson, D. W. [Department of Animal Science, Colorado State University, Fort Collins, CO (United States)

    1965-10-15

    neposredstvennoe opredelenie cezija-137 i drugih radioizotopov, to hranenie prob do raspada cirkonija-95 i niobija-95 (T1/2 - 65 sutok) i rutenija-103 (T1/2 - 40 sutok) daet vozmozhnost' opoznat' fotopiki ostavshihsja radioizotopov. Cezij-137 i marganec-54 mogut byt' otdeleny himicheskim sposobom putem rastvorenija prob v koncentrirovannom rastvore NaOH (cezij-137 iz radio- aktivnyh osadkov rastvorjaetsja polnost'ju tol'ko v sil'nyh shhelochnyh rastvorah) i fil'tro- vanija, chto daet vozmozhnost' udalit' okolo 95% cirkonija-95 i niobija-95. Vymyvanie koncentratov dozhdevoj vody iz kolonki pri pomoshhi odnomoljarnoj NH4 N03 kolichestvenno vydeljaet cezij-137 i jeffektivnym obrazom otdeljaet aktivnost' cirkonija-95 i niobija-95 ot aktivnosti marganca-54. Posle togo, kak vse fotopiki oyli vyjavleny lioo posredstvom raspada, lioo po- sredstvom himicheskogo otdelenija, dal'nejshee kolichestvennoe opredelenie kazhdogo radio- izotopa stanovitsja vozmozhnym posredstvom kalibrovki pri pomoshhi k a zh d o g o izotopa i podscheta komptonovskogo jeffekta kazhdogo iz nih. Poluchennye uravnenija byli resheny na schetno-reshajushhem ustrojstve IBM 1620, i byla sostavlena programma dlja razreshenija problemy koncentracii kazhdogo iz devjati upomjanutyh vyshe radioizotopov. Ta zhe samaja programma byla ispol'zovana dlja opredelenija soderzhanija cezija-137i kalija-40 v moloke, mjase i moche, chto predstavljaetsja bolee prostym sposobom i osushhestvimo s men'shimi po- greshnostjami. (author)

  1. Radioautography in the Study of Radioisotopically-Tagged Substances in Insect Control; L'autoradiographie dans l'etude de substances marquees au moy en de radioisotopes utilisees dans la lutte contre les insectes; Primenenie radioavtografii pri izuchenii substantsij, mechennykh radioizotopami, v bor'be s nasekomymi; La autorradiografia en el estudio de las sustancias marcadas con radioisotopos utilizadas en la lucha contra los insectos

    Energy Technology Data Exchange (ETDEWEB)

    Joftes, D. L. [New England Deaconess Hospital, Boston, MA (United States)

    1963-09-15

    preparatov yavlyaetsya pogruzhenie ikh v rasplavlennuyu massu fotoehmul'sii v temnote i zatem ochistka nizhnej poverkhnosti predmetnogo stekla. Posle ehtogo predmetnye stekla pomeshchayutsya v temnuyu kameru s sukhoj inertnoj atmosferoj i vyderzhivayutsya tam v techenie vremeni, opredelyaemogo ehmpiricheski. Zatem predmetnye stekla proyavlyayutsya, tshchatel'no promyvayutsya, i na nikh nadevayutsya zashchitnye stekla. Posle ehtogo predmetnye stekla gotovy dlya issledovaniya, tochno tak zhe, kak obychnye gistologicheskie preparaty pri vsekh uvelicheniyakh. Neznachitel'noe smeshchenie fokusa vverkh vvodit v pole zreniya radioavtograficheskij obrazets, kotoryj mozhet byt' takim obrazom legko izuchen pri sravnenii s tkan'yu. Daetsya podrobnoe opisanie metodov i neobkhodimogo laboratornogo oborudovaniya. (author)

  2. Motion of Plasmoid in a Curvilinear Magnetic Field; Mouvement d'un Plasmoide dans un Champ Magnetique Curviligne; Dvizhenie plazmennogo sgustka v krivolinejnom magnitnom pole; Movimiento de un Plasmoide en un Campo Magnetico Curvilineo

    Energy Technology Data Exchange (ETDEWEB)

    Vojcenja, V. S.; Gorbanjuk, A. G.; Onishhenko, I. N.; Safronov, B. G.; Hizhnjak, N. A.; Shkoda, V. V. [Fiziko-Tehnicheskij Institut, AN USSR, Khar' kov, USSR (Ukraine)

    1966-04-15

    impurezas era de un 40%. Las principales impurezas estaban constituidas por iones carbono y oxigeno y por los iones de los materiales de los electrodos, y su energia media era superior a la de los protones. A medida que el plasmoide se fue moviendo a lo largo del solenoide toroidal la energia transferida por el plasma y el numero total de particulas cargadas disminuyeron a un quinto y a un tercio, respectivamente, cuando H = 8000 Oe. Simultaneamente, la proporcion de particulas rapidas disminuyo en el espectro de los iones H{sup +} y la energia media se redujo a 2 - 2,5 keV. La velocidad del frente de densidad nj permanecio constante, pero la velocidad del frente de densidad ne disminuyo hasta Tilde-Operator 4 * 10{sup 7} cm/s. La cantidad de impurezas en el plasmoide rapido (sobre todo iones C{sup ++} y 0{sup ++}) fue de un 5%. La energia media de los iones de las impurezas que habian atravesado el campo toroidal fue unas dos veces inferior a la inicial (despues de atravesar el solenoide recto). (author) [Russian] Teoreticheski i jeksperimental'no izuchalos' prohozhdenie plazmennogo sgustka cherez magnitnoe pole toroidal'nogo solenoida j ochistka jetogo sgustka ot primesej tjazhelyh ionov. Teoreticheskij analiz proveden v ramkah drejfovogo priblizhenija. Prohozhdenie plazmy obespechivaetsja blagodarja nalichiju {sup t}okov zamykanija{sup ,} gipotezu o sushhestvovanii kotoryh vyskazal K.D.Sinel'nikov. Nalichie tokov zamykanija sushhestvenno umen'shaet velichinu poljarizacionnyh polej, no kak pokazali vychislenija, ne prepjatstvuet uhodu tjazhelyh ionov na stenki kamery. Dazhe v plotnyh plazmah, kogda 4{pi}n{sub 0}Mc{sup 2}/H{sup 2}{sub 0} >> 1, drejf tjazhelyh ionov podchinjaetsja tem zhe zakonam, chto i v odnochastichnom priblizhenii. Bolee tochnyj analiz struktury polej pokazyvaet, chto narjadu s polem poljarizacii, perpendikuljarnym ploskosti tora, sushhestvuet radial'noe jelektricheskoe pole, napravlennoe k vnutrennej stenke toroidal'noj kamery. Velichina polja

  3. Some Applications of Surface Barrier Solid-State Detectors for Alpha-Activity Detection and Measurement; Quelques Applications des Detecteurs a Semi-Conducteurs a Barriere de Surface pour Deceler et Mesurer l'Activite Alpha; Nekotorye vidy primeneniya detektorov tverdogo sostoyaniya s poverkhnostnym bar'erom dlya izmereniya i obnaruzheniya al'fa-aktivnosti; Aplicaciones de los Detectores de Semiconductores de Barrera Superficial a la Deteccion y Medicion de Emisores Alfa

    Energy Technology Data Exchange (ETDEWEB)

    Perry, K. E.G. [Atomic Energy Establishment, Winfrith, Dorset (United Kingdom)

    1965-10-15

    amplitudy impul'sov, privodjashhie v dejstvie dva reguliruemye mehanicheskie zapisyvajushhie ustrojstva, prichem uroven' diskriminacii reguliruetsja takim obrazom, chtoby zahvatit' pik al'fa-chastic, izluchaemyh plutoniem-239. Dlja analiza jenergij s ochen' bol'shim razresheniem (bolee 1%) proba izmerjaetsja v vakuume pri pomoshhi special'no podobrannogo detektora tverdogo sostojanija, a vyhod postupaet v mnogokanal'nyj analizator. Soobshhajutsja podrobnye svedenija otnositel'no jetogo oborudovanija i poluchennyh s ego pomoshh'ju rezul'tatov. Oborudovanie novoj konstrukcii dlja avtomaticheskogo opredelenija al'fa-izluchenij pri pomoshhi detektora tverdogo sostojanija primenjajutsja dlja dozimetricheskogo kontrolja nad bumazhnymi fil'trami, sobiraemymi iz individual'nyh priborov po otboru prob vozduha, nosimyh na sebe personalom, obrashhajushhimsja s plutoniem. Jeto oborudovanie avtomaticheski proschityvaet kazhdyj iz 12 bumazhnyh fil'trov, sobrannyh za ustanovlennyj promezhutok vremeni, i otpechatyvaet zaregistrirovannoe obshhee chislo schetov. Jeto oborudovanie snabzheno takzhe konturom dlja posledovatel'nogo analiza, kotoryj ochen' bystro daet ukazanie o tom, prevysila li aktivnost' proby zaranee ustanovlennyj uroven' ili net. Jetot zhe samyj metod mozhet byt' legko prisposoblen k izmereniju prob v shirokom diapazone pri dozimetricheskom obsledovanii. Detektory tverdogo sostojanija nahodjat takzhe shirokoe primenenie v zondah razlichnyh tipov dlja obshhego dozimetricheskogo kontrolja nad al'fa-izluchenijami; byli skonstruirovany zondy s chuvstvitel'noj poverhnost'ju ot 12 do 18 sm{sup 2}. Detektory s maloj poverhnost'ju polezny dlja obnaruzhenija pjaten zagrjaznenija na poverhnosti tela, t.k. prochnost', nechuvstvitel'nost' k svetu i prostota vspomogatel'nogo oborudovanija delaet ih bolee udobnymi po sravneniju s detektorami drugih tipov (naprimer, scintilljacionnye schetchiki). Eshhe odnoj vazhnoj privlekatel'noj chertoj detektorov tverdogo sostojanija javljaetsja to

  4. Mass-Spectrometric Investigations of Isotopic Exchange Reactions of Gaseous Hydrocarbon Ions; Recherches, par Spectrometrie de Masse, sur les Echanges Isotopiques des Ions d'Hydrocarbures Gazeux; Mass-spektrometricheskie issledovaniya reaktsij izotopnogo obmena ionov gazoobraznogo uglevodoroda; Estudio del Intercambio Isotopico de Iones Hidrocarburo Gaseosos por Espectrometria de Masas

    Energy Technology Data Exchange (ETDEWEB)

    Wexler, S. [Argonne National Laboratory, Argonne, IL (United States)

    1965-10-15

    componente opuesto agregado, no deben diferir en mas de un orden de magnitud de las velocidades correspondientes a las respectivas reacciones competitivas CH{sub 3}{sup +} + CH{sub 4} -> C{sub 2}H{sub 5}{sup +} + H{sub 2}; D{sub 2}{sup +} + D{sub 2} --> D{sub 3}{sup +} + D para las cuales se han medido secciones de 27 x 10{sup -16} y 56 x 10{sup -16} cm{sup 2}/molecula, respectivamente. Estas secciones corresponden a constantes de velocidad muy elevadas, a saber de 9.9 x 10{sup -10} y 4.0 x 10{sup -9} cm{sup 3} molecula. Los iones metilo isotopicamente enriquecidos tambien deben reaccionar muy rapidamente con D{sub 2}y/o CH{sub 4}, para formar la especie marcada C{sub 2}H{sub 5}{sup +}. (author) [Russian] Ispol'zovalis' metody mass-spektrometrii ''vysokogo davlenija'' dlja izuchenija obmena izotopov vodoroda v uglesoderzhashhih produktah iono-molekuljarnyh reakcij. Sravnenie polozhitel'no zarjazhennyh spektrov H{sub 2} + CH{sub 4}, D{sub 2} + CH{sub 4} i smesej T{sub 2} + CH{sub 4} so spektrami otdel'nyh komponentov, nabljudaemyh pri davlenii istochnikov priblizitel'no v 0,1 sm rtutnogo stolba, pokazalo, chto CHJ i pervichnye iony molekuljarnogo vodoroda bystro vstupajut v reakciju s drugimi komponentami gazovoj smesi, chtoby sozdat' v rezul'tate posledovatel'nyh reakcij vtorichnye i tretichnye ionnye vidy, v kotoryh proishodit shirokij obmen izotopami vodoroda. Kogda dobavljaetsja metan k D{sub 2}, glavnye vidy dejterija D{sub 2}{sup +} i D{sub 3}{sup +} pochti polnost'ju gasjatsja i obrazujutsja C{sub 2}H{sub 4}D{sup +}, C{sub 2}H{sub 3}D{sub 2}{sup +} and C{sub 2}H{sub 2}D{sub 3}{sup +} s vysokim vyhodom. Vidno takzhe, kak ion CH{sub 3}{sup +} bystro reagiruet s molekulami D{sub 2}, chtoby obrazovat' te zhe samye vidy dejterizovannogo jetila. Analogichnye vyvody sdelany v rezul'tate izuchenija sistem T{sub 2} - CH{sub 4}. Nabljudenija za smesjami H{sub 2} + CH{sub 4} podtverdili, chto produkty dejterija i tritija javljajutsja ionami tipa C{sub 2}H{sub 5}{sup +} s odnim