最新刊期
      期 2 ， 1989
      • Qian Simin,Masayuki SEKIGUCHI,Masae TABEI
        Vol. 7, Issue 2, Pages: 1-5(1989)
        摘要：The effect of Electron Beam and γ ray sterilization for silk surgical suture was studied. The initial contamination and distribution of D10 value were measured. Physical and chemical analysis of the material, such as tensile strength, water soluble extractive matter, optical density and U V spectrum were made after irradiation. In addition, a comparsion of material degradation between E B and γ sterilization was investigated.  
        关键词：Radiation sterilization;Indicative bacteria;Bacillus pumilus;Initial contamination;Decimal reduction value;Sterility assurance level   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364617 false
        发布时间：2023-04-23
      • Zhu Shoupeng,Zheng Siying,Wang Liuyi,Yang Suoqin,Zhu Zaying
        Vol. 7, Issue 2, Pages: 6-10,50(1989)
        摘要：The purpose of the present study is to ascertain 147Pm retention in organism and its radiogenotoxicological effect through varying intervals of internal exposure. Especially, accumulation of 147Pm in testis on induction of chromosome aberrations in germ cells and abnormalities in sperm. Results indicated that after iv 147Pm through 50d observation. The retention data in testis were well described by an exponential expression:Studies indicated that the absorption dose in testis was increased when the internal exposure of 147Pm was prolonged. Internal contamination of 147Pm can be induced chromosome aberrations in germ cells and abnormalities in sperm. Among the type of chromosome aberrations of spermatogonium induced by 147Pm including gap, chromatid breakage, chromosome breakage and translocation, as well as polyploid spermatogonium. The chromosome aberration rates and polyploid cells were elevated when the periods of contamination of 147Pm were prolonged. At the same time chromosome fragment and translocations of primary spermatocyte also induced by 147Pm. Studies showed that polyvalent of primary spermatocyte were enlarged only through 10 days of 147Pm contamination. Abnormalities in sperm induced by 147Pm—non-hook sperms were predominant.  
        关键词：Fission product 147Pm;Accumulation;Spermatogonium;Primary spermatocyte;Chromosome aberration Abnormality in sperm   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364654 false
        发布时间：2023-04-23
      • Han Guoxin,Ye Baolin,Jia Fuxing,温 泉法
        Vol. 7, Issue 2, Pages: 11-14(1989)
        摘要：The results in two groups of dogs continuously exposed to γ-rays at 1.78 mGy/day and 4.27 mGy/day for 3 years indicated that the effect of dose rate on the testes was more obvious than that of accumulated dose: in the dogs irradiated with 1.78 mGy/day for 3 years, the testes were unaffected when the accumulated dose reached 1.314 Gy; in the dogs irradiated with 4.27 mGy/day for 6 months, the testes were caused obvious effects when the accumulated dose only reached 0.497 Gy.The damage of the testes began to recover 6 months after the termination of irradiation, morphology of sperm returned soon and completely to normal, quntitative restoration of sperm was charactcristic of long-term and fluctuation.  
        关键词：Irradiation of low dose rate;Sperm;Damage and recovery of testes;Effect of dose rate   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364618 false
        发布时间：2023-04-23
      • Hu Lianping,Gong Yifen,Wu Dechang
        Vol. 7, Issue 2, Pages: 15-20(1989)
        摘要：Damage of membrane of rat alveolar macrophage (AM) by 60Co γ-ray irradiation wes studied. AM, after irradiation with different doses, cultured in vitro for 24 hrs. The percentage of activities of lactate dehydrogenase (LDH) and β-glucuronidase (β-glu) in supernatant of AM culture were measured to reflect the degree of damage of membrane. It was found that relative percentages of LDH and β-glu activities in supernatant increased with the increase of dose. At dose of 0,100, 200,300,400 and 500 Gy the figures were 37.5,41.0,45.8,48.1,49.8 and 51.3% for LDH and 7.0, 9.7,11.5,12.7, 14.5 and 15.3% for β-glu respectively. It indicated that the enzymes in the supernatant were released from the damaged cytoplasmic and lysosomal membrane of the cell. The more severe the damage of membrane, the higher the leakage of enzyme. Besides the morphology of AM was observed by scanning and transmission electromicroscopes. The morphological evidence of damaged membrane was found.The quantitative expression of degree of damage of membrane and its significance were discussed.  
        关键词：Alveolar macrophage;Lactate dehydrogenase;β-Glucuronidase;Leakage of enzyme;Damage of membrane   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364615 false
        发布时间：2023-04-23
      • Wang Hongfu,Chen Yongming,Li Xingdi
        Vol. 7, Issue 2, Pages: 21-23(1989)
        摘要：In the previous work, it has been shown that the reaction of blood platelet aggregation is risen during the early days following γ ray irradiation of large doses. In this paper, it is reported that changes of Rat PGI2-like activity with inhibiting platelet aggregation after γ ray irradiation of 8 Gy. The results indicated that the activity was reduced at the first day after radiation, then recovered at the third day, lowered again at the 5-7 days. The changs have significant concern between the increase of blood platelet aggregation of Rats and the inhibition of PGI2-like activity of blood vessel wall following r ray irradiation.  
        关键词：γ ray irradiation;Platelet aggregation;PGI2   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364619 false
        发布时间：2023-04-23
      • Xu Rong,Qian Hongwei,Yao Fenying,Gu Shuzhu,Xu Jiaxin,Bi Hekan,Liu Ynying
        Vol. 7, Issue 2, Pages: 24-27(1989)
        摘要：Mutation and killing caused by X-ray radiation and 60Co γ-ray radiation were studied in three different tryptophan-requiring auxotrophs (wp2, Wp2A, Cm 891) of Escherichia coli. These testers are sensitive to base pair substitution mutagens. Cm891 carries a R-factor and is more sensitive than wp 2 and wp2A to radiation-induced mutation and lethality. The results of our study show that (1)ionizing radiation was mutagenic to E. coli, (2) the order of mutagenic sensitivity among three strains to ionizing radiation was Cm 891>wp2A>wp2, (3) the dose rate of γ-ray influence mutagenicity and lethalty of E. coli strain, (4)the toxicity and mutagenicity of γ-ray were similar to X-ray when Cm891 was tested, however, γ-ray was more toxic and mutagenic than X-ray to wp2A ang wp2.  
        关键词：Radiation;Mutagenicity;Tryptophan   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364701 false
        发布时间：2023-04-23
      • Qi Shengchu,Dong Changzhi,Wu Jilan
        Vol. 7, Issue 2, Pages: 28-33(1989)
        摘要：γ-radiolysis of KCN aqueous solution contained clay and pd-black has been studied. The product spectrum and the main product yields have also been determined by paper chromatography. A small amounts of clay (0.2 g/5 ml) can lightly increase the yields of amino acids, but a large quantities of clay (2.7g/5 ml)can inhibit the formation of amino acids. Some solids (such as clay, pd-black) can catalytically polymerize CN- ion to form polymers which produce some amino acids on hydrolysis. There exist some evidence about peptide or quasi-peptide substances in the clay-containing samples. The samples show positive reaction to Folin-Phenol reagent and amino acids are formed on hydrolysis.  
        关键词：Clay;pd-black catalyst;Amino acids;Radiolysis of KCN aqueous solution;Paper chromatography   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364699 false
        发布时间：2023-04-23
      • Qi Shengchu,Li Zhongzhe,Zhou Yurong,Wu Jilan,Wei Jinshan
        Vol. 7, Issue 2, Pages: 34-37(1989)
        摘要：In this paper, the yield and distribution of 2, 3-butanediol isomers formed during the irradiation of liquors have been investigated and compared with that of the isomers in some ordinary liquors. It has been found that some commercial liquors also contain 2,3-butanediol, but there is difference in the distribution of their optical isomers. 2,3-butanediol is in the forms of meso and dl for irradiated liquor and its ratio(meso/dl)=1. In commercial liquors, 2,3-butanediol is in the forms of meso and 1 and its ratio(meso/1)≤0.5.G(2, 3-butanediol) values have been determined in various systems. For liquid ethanol saturated with N2 G(2,3-butanediol)=2.23, 1.46 for the irradiated liquor sample-1 without oxygen and 0.35 for the liquor specimen-1 irradiated under the condition of limited air supply. The results show that (1) the soluble oxygen in liquor can inhibit the formation of 2, 3-butanediol; (2) the other compositions in the liquor can compete with ethanol molecules in reacting with active species(H, , OH etc.) and form some unknowns. Therefore, we must pay attention to the hygienic satefy of those unknowns in the irradiated liquor.  
        关键词：Liquors;Irradiation of liquors;2,3-butanediol   
        2
        |
        0
        |
        3
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364710 false
        发布时间：2023-04-23
      • Wang Hung,Zhang Wanxi,Sun Jiazheng
        Vol. 7, Issue 2, Pages: 38-41(1989)
        摘要：The radiation-induced degradation of PMMA in PMMA-PVDF blend and the radiation effects on mechanical properties of the blends and crystalline of PVDF were studied. The dose dependence of the radiation-induced degradation is linear: the degree of degradation can be determined by the quantity of extractable sample; the existence of PVDF can reduce the radiation damage of PMMA; under higher dose region, the melting peak of PVDF splits across.  
        关键词：Melting peak;Radiation degradation;Poly(vinylidene fluoride);PMMA   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364686 false
        发布时间：2023-04-23
      • Sheng Huaiyu,He Yonghai,Wang Zhizhang,Chen Yaoguan,Liu Renzhong,Tu Tiechen,Wang Qizhong,Yuan Shengang
        Vol. 7, Issue 2, Pages: 42-50(1989)
        摘要：The radiation stability of various chemical bonds of organic phosphates and phosphonates were studied by using of low-temperature (77 K) ESR measurement of radicals formed in gamma-irradiated samples at 77 K, and by using of MS spectral analysis and the partial charges of atoms calculated by iterative partial equlization of orbital electronegativity.  
        关键词：Phosphates;Phosphonates;Radiation stability;Partial charge of atoms calculation;Low temperature ESR spectrium   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364736 false
        发布时间：2023-04-23
      • Liu Liming,Tang Chuandao,Peng Guangjian,Lan Junming
        Vol. 7, Issue 2, Pages: 51-56(1989)
        摘要：The presented research was to explore the effects of the radiation preservation of Wenzhou Orange by 60CO γ rays irradiating the fruits of the meddleseason variety "Weizhang" of Wenzhou Orange. Through several years of continuous studies from 1983 to 1986, it was determined that the optimum irradiation dose was 20-50 Gy when the fruits were wrapped in 0.015 mm thick ployethylene film. After storage of 80-100 days under the room temperature, the preservation percentage of well-kept fruits of irradiated orange was 104-110% as much as that of unirradiated orange, and no change in quality was observed.  
        关键词：Irradiation preservation;Wenzhou mandarin orange   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364747 false
        发布时间：2023-04-23
      • Liu Junchen,Zhao Jun
        Vol. 7, Issue 2, Pages: 57-58(1989)
        摘要：The rose essential oil is obtained by steam distillation of rose flower, With this way, rose oil yield is very low, therefore the price of rose essential oil is expensive. A technology of using 60Co γ-irradiation to increase essential oil yields has been developed in our laboratory and factory. The yields had been increased over 50%. The main chemical components were identified, and the fragrance of the essential oil was evaluated by specialist. using 60Co γ-irradiation, the qualities of rose essential oil are not influenced.  
        关键词：Rose;Rose essential oil;γ-irradiation   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364737 false
        发布时间：2023-04-23
      • Zhang Mingjian,Lin Shenhao,Yang Mujie,Zhao Jian
        Vol. 7, Issue 2, Pages: 59-62(1989)
        摘要：The photoconductivity of polyphenylacetylene (PPA) have been obviously improved after PPA irradiation by γ-ray or electron-beam. The photo-current to dark-current ratios were increased about 3 orders of magnitude. The stability of photoconductivity of irradiated PPA are studied. The effects of energy and flux for electron-beam radiation on the photoconductivity of PPA are reported. The effects of dose and storage period after γ- radiation are also discussed.  
        关键词：Polyphenylacetylene;Radiation;Photoconductivity   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 36364742 false
        发布时间：2023-04-23
      0