最新刊期
期 1 ， 1991
- 摘要：The paper described the research result of the factors for speeding up mellowness of yellow rice wine by irradiation of low dosage. The effect of speeding up its mellowness was gained through the research of different dosage, irradiated temperature, different container, space of container and storing temperature etc. The experiment indicated that the best dosage was 100—600 Gy with 30—40℃ temperature; the pottery container for wraping wine was better than the glass one; the better space was 100 ml empty of one container and the storing time of irradiated wine covered 5—6 months.关键词：Yellow Rice Wine;Irradiation Mellowness
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发布时间：2023-04-23 - 摘要：The radiation-induced polymerization of acrylamide in ethanol has been studied. It was found that the monomer conversion increases with the increment of temperature, dose rate, and the monomer concentration as well. But the molecular weight of the Polymer decreases when the temperature increases.The activation energy for the polymerization. of AM/ETOH system is calculated to be 7.56 kJ/mol.关键词：Radiation polymerization;Acrylamide
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发布时间：2023-04-23 - 摘要：Using the transport equation of radiation, the disturbance of radiation field due to the introduction of a detector into a medium can be precisely expressed as the influence of an equivalent radiation source in the region, where the detector exists, on the radiation field. This result makes it possible to precisely estimate the correct coefficient of the disturbad radiation field. On this basis, the disturbance of the radiation fields in the cases of an infinitely high rectangular cavity and a small spherical detector is evaluated.关键词：Disturbance of radiation field;Detector;Equivalent radiation source
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发布时间：2023-04-23 - 摘要：In this present work, methyl vinyl silicone rubber (MVSR) with analogous molecular weight and various contents of vinyl group has been synthesized, and in the process of radiation crosslinking the relationship between sol fraction and dose has been studied. At 0—100 kGy dose range, it was found from experiment that the variation of degree of crosslinking (q) and degree of degradation (α) with dose may be described by the follouwing equations respectively namely q=q0R and
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发布时间：2023-04-23 - 摘要：In this paper, the radiation effects on the blends of polyisobutylene with polyethylene, EVA, SBR,EPR and 1,2-Polybutadiene have been studied. It was found that radiation crosslinking take place in the melt mixing PIB/EPR blend at the range of R=4×104 - 3×105 Gy and PIB%=50—80 and when the content of PIB in the blend reach 70%, the crosslinking density of PIB is the largest. PIB in PIB/PE and PIB/1,2-PB blends produce a little crosslinking, while PIB in the blends of PIB with the other polymers take place degradation after irradiation.关键词：Polyisobutylene;Polyethylene;EPR;Radiation crosslinking;Radiation degradation
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发布时间：2023-04-23 - 摘要：The radiation responses of two heterogeneous murine tumor lines in vitro was studied at the time of X-irradiation. The proliferating (P-cells) 66 and 67 cells displayed equal radiosensitives, however, the quiescent (Q) cells were considerably more radiosensitive than the P-cells, with the 66 Q being more radioresponsive than the 67 Q. A detailed analysis of the metabolic status vs cell-cycle age (i. e., G1 vs S-phase) indicates that the cell-cycle age was the predominat influencing factor for radiation-induced responses. The data also showed that in the plateau phase Q-cell cultures pH and cell density were not influencing factors.关键词：Murine mammary tumor cells;Radiation induced responses;Heterogeneity
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发布时间：2023-04-23 - 摘要：Malignant transformation of Syrian hamster embryo(SHE) cells in vitro was induced by low-dose of 60Co γ-ray combined with EP. The transformation was not observed in the groups that the γ-rays or EP was given alone.The results snggested that the combination of low-dose of γ-ray and EP may have the synergetic effect of carcinogenesis on cells in vitro. The results also showed that transformation of cells in vitro is a multistage processes.关键词：Syrian Hamster Embryo cell;Female sex hormone (EP, estradiol valerateand hydroxyprogesterone caproate);γ-ray
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发布时间：2023-04-23 - 摘要：DNA single-strand break and rejoin were assayed in normal fibroblast ataxia telangiectasia (AT) and AT heterozygote cells by double label alkaline elution. The single-strand break in these three different lines of cells after 10 Gy X-radiation is about the same, but there is significantly different from the contral. After 37℃ incubation, the single-strand break of these three lines cells repaired accordingly with the time 15,30, 60 minutes. There are almost repaired within 60 minutes. The single-st-rand break in three different lines of cells are partly repaired after 37℃ incubation when 5×10-4 mol/L aphidicolin was added.关键词：Radiation;3H、14C double label;Alkalin elution
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发布时间：2023-04-23 - 摘要：Malignant transformation of golden hamster embryo cells was induced by thorium dioxide consisted of 228Th and 232Th in equal quantity. The final concentration of thorium dioxide was 3 or 6 µg/ml medium, special activities of radiation were 0.01065 or 0.0212 Bq and accumulative average absorbed dose for each cell was 4.24×10-12—3.38×10-9 mGy.Morphological transformation foci appeared 15 days after thorium dioxide added. Cell mutation was observed in ouabain-resistant assay. Maximum saturation density of transformed cells was increase 4.4 times as comparing with control group. The transformed cells acquired the agglutinability following exposure to concanavalin A. Increase of the microvilli on the surface with various thickness and formation of blebs and ruffles were observed. The transformed cells gained the ability of forming colonies in soft-agar medium 33 days after exposure to thorium dioxide.The above results indicated that malignant transformation of golden hamster embryo cells was directly induced by thorium dioxide in vitro.关键词：Embryo cells;Golden hamsters;Thorium dioxide;Malignant transformation
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发布时间：2023-04-23 - 摘要：This paper reports the cytokinesis-block micronucleus method in micro-blood cultures. It was performed that CB method in comparison with conventional micronucleus (CM) method for detection induced micronuciei of different doses of 60Coγ-rays irradation and spontaneous micronucleus of different ages. The results showed that direct peripheral micro-blood cultures also obtained the cytoknesisblock micronuclei. Using CB method, the micronuclei fequency of different ages was a linear relationship, Y=1.62+0.74 D, the spontaneous micronuclei frequency of different ages was 4.14% the induced micronuclei also showed that was a linear relationship, Y=6.01+0.692 D. Using CM method, it showed that the induced micronuclei was a linear relationship, Y=0.486 D-1.968,but there is no significant difference seen between the micronuclei frequency of different ages. Comparison with CM and direct blood smear methods confirmed that the cytokinesis-block method of micro-blood cultures is more sensitive and precise.关键词：Cytokinesis-block micronucleus;Cytochalaain B;60Co γ-irradiation
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发布时间：2023-04-23 - 摘要：In present paper the results of regeneration of activated carbon adsorbing sodium lauryl sulfate (SLS) by 2 Mev electron radiation, and the dependence of the regeneration rate of activated carbon on the electron current intensity, the temperature of sample and the atmosphere were reported. It is shown that regeneration of activated carbon by electron radiation is full of promise.关键词：Electron radiation;Activated carbon Regeneration;Iodine number
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发布时间：2023-04-23 - 摘要：This paper reports the result of radiation sterilization of aspergillus niger pectinase liquid by 60Co γ-rays. When absorbed dose was from 1 kGy to 25 kGy, enzyme activity didn't reduce. When absorbed dose was 15 kGy, There aren't active strains in the enzyme liquid: and enzyme activity of the enzyme liquid by preserved had better preserved effect.关键词：Aspergillus niger pectinase liquid;Sterilized effect;Enzyme activity;Preserved effect
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发布时间：2023-04-23 - 摘要：The changes of surface composition of polyvinylchloride (PVC) films induced by X ray in ultrahigh vacuum are studied using X ray photoelectron spectroscopy(XPS). The results show: (1) The degradation of PVC occurs accompanied with the elimination of HCl and the formation of polyene sequence of longer length. (2) Selfacceleration exists in the degradation of PVC, and it is concerned in the power of irradiation. (3) During initial periods irradiated, the loss of chlorine is only concerned in time, and not in depth: after a time, the degradation is accelerated, the surface enrichment of Cl is observed because HCl can not be in time eliminated from the surface.(4) The longer the irradiation time, the more the loss of chlorine: the more the power of irradiation, the more the loss of chlorine.关键词：XPS;Polyvinylchlorine;X ray
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发布时间：2023-04-23
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