Radiation Physics and Chemistry (1977)最新文献

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Flash photolysis and pulse radiolysis. Contributions to the chemistry of biology and medicine 闪光光解和脉冲辐射解。对生物化学和医学的贡献
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90235-3
John A. Stone
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引用次数: 18
Electron beam treatment of stack gases 电子束处理烟囱气体
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90247-X
N. Frank, K. Kawamura, G. Miller
{"title":"Electron beam treatment of stack gases","authors":"N. Frank,&nbsp;K. Kawamura,&nbsp;G. Miller","doi":"10.1016/0146-5724(85)90247-X","DOIUrl":"10.1016/0146-5724(85)90247-X","url":null,"abstract":"<div><p>A method of simultaneously removing sulfur dioxide and nitrogen oxides from high sulfur, coal-fired utility boiler combustion gases is discussed. Process development history is briefly presented and salient details of a commercial demonstration unit currently under construction at an electric utility power plant in Indiana are given. Detailed discussion on the design details and performance requirements of a cable connected set of 80 kW electron beam sources precedes a discussion of the projected economics of the process. Requirements for future electron beam machine configurations and capacities as well as impact on the radiation machine manufacturing industry, assuming acceptance of the process by the electric utilities, are presented.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Pages 35-45"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90247-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53763496","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: 14
Radiation treatment of combustion gases: Formulation and test of a reaction model 燃烧气体的辐射处理:反应模型的制定和试验
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90248-1
F. Busi , M. D'Angelantonio , Q.G. Mulazzani , V. Raffaelli , O. Tubertini
{"title":"Radiation treatment of combustion gases: Formulation and test of a reaction model","authors":"F. Busi ,&nbsp;M. D'Angelantonio ,&nbsp;Q.G. Mulazzani ,&nbsp;V. Raffaelli ,&nbsp;O. Tubertini","doi":"10.1016/0146-5724(85)90248-1","DOIUrl":"10.1016/0146-5724(85)90248-1","url":null,"abstract":"<div><p>A generalized kinetic mechanism for radiation induced oxidation of nitrogen oxides from exhaust gases in the absence of sulfur dioxide is formulated. The responses obtained by the mathematical simulation are in good agreement with reported experimental results.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Pages 47-55"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90248-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53763524","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: 30
Marketing of irradiated commodities in South Africa 辐照商品在南非的销售
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90252-3
TA Du Plessis, RCB Stevens
{"title":"Marketing of irradiated commodities in South Africa","authors":"TA Du Plessis,&nbsp;RCB Stevens","doi":"10.1016/0146-5724(85)90252-3","DOIUrl":"10.1016/0146-5724(85)90252-3","url":null,"abstract":"<div><p>Although the industrial exploitation of radiation processing in the medical and allied fields has been successfully marketed and applied for the past two decades in South Africa, the introduction of food radurisation on an industrial level adds a completely new dimension to the marketing of this processing technique. Extensive research into the use of radiation for the treatment of various foodstuffs has been carried out by the Nuclear Development Corporation of South Africa for more than a decade, resulting in South Africa being one of the first countries where a commercial irradiator dedicated to this branch of radiation processing, was established. The marketing of this process is especially difficult due to the emotive aspects associated with radiation and man's sensitive reaction to anything pertaining to his food. This situation was made even more difficult by the general public's apprehension towards nuclear activities throughout the world. In an attempt to transform the unfavourable public image associated with this process, an important first step was to form a National Steering Committee for the Marketing of Radurised Food, the members of which were drawn from various agricultural controlling bodies, the Department of Health, and other controlling bodies held in high esteem by the public, such as the Consumer Council and representatives from commerce and industry. This approach proved to be very successful and greatly assisted in creating a climate whereby the public in South Africa today generally has a favourable attitude towards the radurisation of foodstuffs. The development of this marketing strategy for food radurisation in South Africa is discussed in detail.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 1","pages":"Pages 75-79"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90252-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53763742","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
Trends in radiation dosimetry 辐射剂量学的发展趋势
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90043-3
P.C. Williams
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引用次数: 9
EB curable wetting resins for magnetic media coatings 磁性介质涂料用EB固化湿性树脂
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90138-4
L. Laskin, R.E. Ansel, K.P. Murray, S.R. Schmid
{"title":"EB curable wetting resins for magnetic media coatings","authors":"L. Laskin,&nbsp;R.E. Ansel,&nbsp;K.P. Murray,&nbsp;S.R. Schmid","doi":"10.1016/0146-5724(85)90138-4","DOIUrl":"10.1016/0146-5724(85)90138-4","url":null,"abstract":"<div><p>The magnetic media industry is studying means to improve the recording density, durability, product uniformity and production efficiency and to reduce wetting agent migration in the magnetic film. The use of electron beam curable resin binders for magnetic coatings is one of the approaches being studied for this.</p><p>This paper compares the wetting efficiencies of several electron beam curable systems with a conventional resin and a conventional wetting agent. In this study it has been demonstrated that EB resins can be designed to effect proper magnetic pigment dispersion.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"25 4","pages":"Pages 587-598"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90138-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"110502639","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
Effect of gamma radiation on gelation in polyvinyl alcohol solutions γ辐射对聚乙烯醇溶液凝胶化的影响
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90031-7
Chen Wenxiu, Bao Huaying, Zhang Manwei
{"title":"Effect of gamma radiation on gelation in polyvinyl alcohol solutions","authors":"Chen Wenxiu,&nbsp;Bao Huaying,&nbsp;Zhang Manwei","doi":"10.1016/0146-5724(85)90031-7","DOIUrl":"10.1016/0146-5724(85)90031-7","url":null,"abstract":"<div><p>The radiation effect of various pH values on polyvinyl alcohol aqueous solutions and on organic solutions, as well as those of scavengers in the aqueous solutions were examined. The gelation dose R<sub><em>g</em></sub> changes with various pH values; a small amount of free radical scavengers in the system inhibits the crosslinking of polymer molecules and raises R<sub><em>g</em></sub>. Degradation of polyvinyl in alcohol dimethyl sulfone solution occurs after irradiation, providing a mechanism of radiation-induced crosslinking of polyvinyl alcohol aqueous solutions is initiated by the transient species H and OH of water, but not the species e<sup>-</sup><sub>aq</sub>.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 1","pages":"Pages 43-47"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90031-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53753623","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: 20
The delocalization of the energy of the ionizing radiation in a molecular medium and its radiation-chemical features 分子介质中电离辐射能量的离域及其辐射化学特征
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90033-0
I.G. Kaplan, A.M. Miterev
{"title":"The delocalization of the energy of the ionizing radiation in a molecular medium and its radiation-chemical features","authors":"I.G. Kaplan,&nbsp;A.M. Miterev","doi":"10.1016/0146-5724(85)90033-0","DOIUrl":"10.1016/0146-5724(85)90033-0","url":null,"abstract":"<div><p>The problem of delocalization of the energy initially absorbed by the medium is considered. We present a rigorous derivation of the formula for the delocalization due to the uncertainty principle for particles of arbitrary velocity. Using the value of the effective range of the electromagnetic field of a moving particle, we estimate the dimensions of the collective excitation area. We also discuss the possible radiation-chemical consequences of the initial delocalization of the energy absorbed by the medium.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 1","pages":"Pages 53-56"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90033-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53753953","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: 8
The radiolysis of simple gas mixtures—III. the production of “trace organics” 简单气体混合物的辐射分解- iii。“微量有机物”的产生
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90063-9
Alan Dyer, Graham E. Moores
{"title":"The radiolysis of simple gas mixtures—III. the production of “trace organics”","authors":"Alan Dyer,&nbsp;Graham E. Moores","doi":"10.1016/0146-5724(85)90063-9","DOIUrl":"10.1016/0146-5724(85)90063-9","url":null,"abstract":"<div><p>Carbon dioxide based gas mixtures, similar to those used as coolants in the Advanced Gas-cooled Nuclear Reactors, have been radiolyzed at the comparatively low dose rate of 3 Gy s<sup>-1</sup> using γ-radiation from a <sup>60</sup>Co source. The concentrations of certain C<sub>4</sub> and C<sub>5</sub> alkanes, ethanal and propanone, produced by radiolysis, have been determined under different conditions of temperature, pressure, gas composition, and surface area. Observations showed that these compounds were produced in concentrations of the order of 1/1000 of the methane concentration and that the production of these “trace organics” varied in a complex way with the experimental parameters. Mechanisms for the production of these organics have been proposed. Some unidentified products of radiolysis were observed and suggestions are made as to their nature.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 3","pages":"Pages 267-272"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90063-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53754864","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: 1
A spectrophotometric readout method for free radical dosimetry 自由基剂量测定的分光光度读出方法
Radiation Physics and Chemistry (1977) Pub Date : 1985-01-01 DOI: 10.1016/0146-5724(85)90102-5
B.L. Gupta, R.M. Bhat, G.R. Narayan, S.R. Nilekani
{"title":"A spectrophotometric readout method for free radical dosimetry","authors":"B.L. Gupta,&nbsp;R.M. Bhat,&nbsp;G.R. Narayan,&nbsp;S.R. Nilekani","doi":"10.1016/0146-5724(85)90102-5","DOIUrl":"10.1016/0146-5724(85)90102-5","url":null,"abstract":"<div><p>An accurate and inexpensive spectrophotometric readout method is given for free radical dosimetry. The stable free radicals in irradiated alanine/glutamine powder, when dissolved in a solution containing ferrous ammonium sulphate and xylenol orange in 0.05 N H<sub>2</sub>SO<sub>4</sub>(FX), oxidize ferrous ions and the xylenol orange forms a complex with ferric ions produced in the solution. The absorbance of the complex is measured at 525 nm for alanine and at 540 nm for glutamine. The influence of various parameters, such as size of the container, weight of the powder dissolved, xylenol orange concentration, purity of distilled water, postirradiation stability and dose-rate dependence on the response of the dosimetric technique, has been investigated. It was found that the dosimetric response is independent of dose-rate. Alanine does not show any significant postirradiation fading. Irradiated glutamine powder is stable for about a month, the fading is less than 2% up to three months later, and it increases to only about 5% over a period of six months. The reproducibility of the method is better than ±2%, and it offers an alternative to ESR and lyoluminescence techniques for free radical dosimetry. A dose of 0.01 to 4 kGy can be measured with an alanine dosimeter and 0.1 to 100 kGy with a glutamine dosimeter. Empirical relationships between absorbance and dose are given.</p></div>","PeriodicalId":101054,"journal":{"name":"Radiation Physics and Chemistry (1977)","volume":"26 6","pages":"Pages 647-656"},"PeriodicalIF":0.0,"publicationDate":"1985-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0146-5724(85)90102-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53755605","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: 37
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