Radiation research. Supplement最新文献

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Induction of different classes of genetic effects in yeast using heavy ions. 利用重离子在酵母中诱导不同类型的遗传效应。
Radiation research. Supplement Pub Date : 1967-01-01
S Nakai, R Mortimer
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引用次数: 0
Survival, chromosome abnormalities, and recovery in heavy-ion and x-irradiated mammalian cells. 重离子和x射线照射下哺乳动物细胞的存活、染色体异常和恢复。
Radiation research. Supplement Pub Date : 1967-01-01
L D Skarsgard, B A Kihlman, L Parker, C M Pujara, S Richardson
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引用次数: 0
Injury accumulation and recovery in sheep during protracted gamma irradiation. 长时间γ辐射对绵羊损伤积累和恢复的影响。
Radiation research. Supplement Pub Date : 1967-01-01
G F Leong, N P Page, E J Ainsworth, G E Hanks
{"title":"Injury accumulation and recovery in sheep during protracted gamma irradiation.","authors":"G F Leong, N P Page, E J Ainsworth, G E Hanks","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"7 ","pages":"288-93"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17125202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Free radicals induced in enzymes by electrons and heavy ions. 酶中由电子和重离子诱导的自由基。
Radiation research. Supplement Pub Date : 1967-01-01
T Henriksen
{"title":"Free radicals induced in enzymes by electrons and heavy ions.","authors":"T Henriksen","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"7 ","pages":"87-101"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"15400945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Studies on Vicia faba root meristems irradiated with a pion beam. 介子束辐照蚕豆根分生组织的研究。
Radiation research. Supplement Pub Date : 1967-01-01 DOI: 10.2307/3583711
S. Richman, C. Richman, M. R. Raju, B. Schwartz
{"title":"Studies on Vicia faba root meristems irradiated with a pion beam.","authors":"S. Richman, C. Richman, M. R. Raju, B. Schwartz","doi":"10.2307/3583711","DOIUrl":"https://doi.org/10.2307/3583711","url":null,"abstract":"in the tumor region might overcome some of the radioresistance of an anoxic tumor. The most useful beam available at the cyclotron for our purpose is a 90-MeV tr- beam. At this energy the intensity of the pion beam is a maximum and the background is not excessive. The range of these pions is around 25 cm of tissue, which is excessive for the therapeutic applications. In studying the effects of the stopping pions, therefore, an appreciable amount of Lucite absorber must be used, which not only attenuates the beam but also produces loss by divergence of the beam. These factors must be considered in irradiating biological materials. The dosimetry of this radiation presents a number of new problems that have not been entirely solved. Among these, at present, is the fact that the background radiation, consisting of electrons and muons in the beam, amounts to about 40% of the total number of particles in the beam. In spite of the questions that remain to be answered, it is nevertheless useful to","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"1 1","pages":"182-9"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83418697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Relative biological effectiveness of different types of ionizing radiations: cytogenetic effects in maize. 不同类型电离辐射的相对生物学效应:玉米细胞遗传学效应。
Radiation research. Supplement Pub Date : 1967-01-01
H H Smith
{"title":"Relative biological effectiveness of different types of ionizing radiations: cytogenetic effects in maize.","authors":"H H Smith","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"7 ","pages":"190-5"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17125192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A mortality determinant in nonuniform exposures of the mammal. 哺乳动物非均匀暴露的死亡率决定因素。
Radiation research. Supplement Pub Date : 1967-01-01
V P Bond, C V Robinson
{"title":"A mortality determinant in nonuniform exposures of the mammal.","authors":"V P Bond, C V Robinson","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"7 ","pages":"265-75"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17125201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Space-flight-related stresses on the central nervous system. 与太空飞行有关的中枢神经系统压力。
Radiation research. Supplement Pub Date : 1967-01-01
R L Schoenbrun, W R Adey
{"title":"Space-flight-related stresses on the central nervous system.","authors":"R L Schoenbrun, W R Adey","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"7 ","pages":"423-38"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"16056977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The use of deuteron microbeam for simulating the biological effects of heavy cosmic-ray particles. 用氘核微束模拟重宇宙射线粒子的生物效应。
Radiation research. Supplement Pub Date : 1967-01-01 DOI: 10.2307/3583718
H. Curtis
{"title":"The use of deuteron microbeam for simulating the biological effects of heavy cosmic-ray particles.","authors":"H. Curtis","doi":"10.2307/3583718","DOIUrl":"https://doi.org/10.2307/3583718","url":null,"abstract":"atomic nuclei of elements heavier than carbon and as heavy as iron. They are stripped of their electrons and thus are highly charged. As these particles are slowed down in tissue, they interact with the elements of the tissue and cause very energetic 6 rays to be emitted. The result is a track in tissue having very dense ionization near the end of its path, and this is known as a \"thindown.\" This thindown region may be as much as 0.025 mm in diameter and 1.5 mm long. Schaefer (1) has computed that the radiation dose in this ionization core may be as much as 10,000 rads at its center, tapering off to low values toward the edges. Only the particles having energies less than about one billion electron volts per nucleon will cause this type of damage, since particles of higher energies will form stars and dissipate their energies widely. It would be virtually impossible to shield against these latter particles in a space craft because even a very heavy shield would only slow down the very energetic particles to the point where they would become highly ionizing and thus dangerous. In assessing the biological effect of such particles it would obviously not be correct to apply the usual rules for tolerance doses-that is, to compute the total dose from the energy deposited in the body of an average man. For heavy particles the energy is all deposited in very small volumes, or \"hot spots,\" leaving the rest unaffected. This then constitutes a special radiobiological problem. These particles cannot presently be generated in the laboratory with sufficient energy to be used for mammalian experiments. Consequently an indirect experimental approach had to be developed (2). This consisted in confining the 22-MeV deuterons from the Brookhaven 60-inch cyclotron in a beam 0.025 mm in diameter. This microbeam was arranged in such a way that it could be directed at any pre1 Research carried out at Brookhaven National Laboratory under the auspices of the U. S.","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"38 1","pages":"250-7"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86781818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 84
Ultraviolet-induced excited states in deoxyribonucleic acid. 紫外诱导的脱氧核糖核酸激发态。
Radiation research. Supplement Pub Date : 1967-01-01 DOI: 10.2307/3583707
R. Rahn, R. Shulman, J. Longworth
{"title":"Ultraviolet-induced excited states in deoxyribonucleic acid.","authors":"R. Rahn, R. Shulman, J. Longworth","doi":"10.2307/3583707","DOIUrl":"https://doi.org/10.2307/3583707","url":null,"abstract":"All measurements were made at 77?K on samples dissolved in a 1:1 ethylene glycol-water mixture. Concentrations used for making optical measurements were in the range of 10-3 to 10-4 M, while the ESR measurements were made on samples varying from 10-2 to 10-3 M. An Aminco-Bowman spectrophotometer was used to obtain optical data at low resolution for quantitative purposes. For higher resolution, Bausch and Lomb 0.5-meter grating monochromators were used for both excitation and emission. A Varian Associates X-band spectrometer with 100-kc/s modulation was used for the ESR measurements. A 200-watt, high-pressure mercury lamp was used for excitation in the microwave cavity.","PeriodicalId":77888,"journal":{"name":"Radiation research. Supplement","volume":"35 1","pages":"139-46"},"PeriodicalIF":0.0,"publicationDate":"1967-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81539264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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