最新刊期
      期 1 ， 2010
      • ZHANG Xiaomin,DENG Bo,LI Jingye,YAO Side
        Vol. 28, Issue 1, Pages: 1-4(2010)
        摘要：Fullerene holds a potentially important application value in biology for its special structure. However, its indissolubility in water limits its further application in relative fields. Preparation of water-soluble fullerene derivatives has been proved to be an effective way to solve the problem. In this paper, UV light with 254 nm wavelength was used as the irradiation source. Fullerene molecules can be attacked by hydroxyl radicals (·OH) produced from photo-decomposition of hydrogen peroxide (H2O2) via subsequent additive reaction. Then fullerenol was successfully synthesized and its structure was characterized by FT-IR, 1H-NMR and UV-vis. The experimental results show that the molecular structure of fullerenol is C60(OH)26. It may be a novel method to synthesize water-soluble fullerenol easily by the UV oxidation.  
        关键词：Fullerene;Fullerenol;Ultraviolet light;Oxidation;Water suspension   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834384 false
        发布时间：2023-03-30
      • Mamatjan YIMIT,Ismayil KIRAM,Ismayil NURULLA
        Vol. 28, Issue 1, Pages: 5-10(2010)
        摘要：Acrylic acid(AA)-acrylic amide (AM) copolymer resin with high absorbency of water was polymerized with acrylic acid, acrylic amide and sodium hydroxide in the free of any cross-linker and initiator under UV irradiation by use of a high- pressured ultraviolet mercury lamp. The influences of monomer ratio, neutralization degree, irradiation time and resin size on the water absorbency performance of synthesized copolymer was investigated. The parameters of resin synthesized in optimum condition are as follows, the deionized water absorbency is 3062 g/g, the saline water (0.9% NaCl) absorbency is 241 g/g, tap water absorbency is 232 g/g, the artificial blood absorbency is 367 g/g, and the artificial urine absorbency is 76.6 g/g.  
        关键词：Acrylic acid(AA)-acrylic amide(AM) copolymer;Absorbency of water;High absorbent resin;UV photo-polymerization   
        2
        |
        0
        |
        4
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834377 false
        发布时间：2023-03-30
      • LUO Yan,WANG Dehai,HUO Chao,YANG Xiazhen
        Vol. 28, Issue 1, Pages: 11-14(2010)
        摘要：The photosensitivity resins which contain BYK®-307, EFKA®-3772, and BYK®-307+EFKA®-3772 respectively were UV cured under different atmospheres (air and N2). The surface properties of the cured films were characterized by means of surface energy measurement and X-ray photoelectron spectroscopy. The results show that the surface energy of the films with mixed probe components drops obviously, also the bonding energy of Si and F are changed obviously, and the difference is 0.4 eV and 2.13 eV, respectively. It indicates that the chemical environment can transform the result in the different surface energy of the films. Furthermore, the content of Si is high, whereas the content of F is especially low and even can’t be detected, which shows that it is easier for the segment with Si to migrate to the surface during the curing process.  
        关键词：Surface energy;XPS;Binding energy;Atom concentration   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834386 false
        发布时间：2023-03-30
      • LI Yang,XU Yunshu
        Vol. 28, Issue 1, Pages: 15-19(2010)
        摘要：In order to prepare silicon carbide(SiC) fiber tubes, polycarbosilane precursor(PCS) fibers were irradiated by 10 MeV electron beams(EB) under atmosphere. The effects of irradiation art, heat treatment temperature,and absorbed dose on the performance of SiC fiber tube have been discussed and the relevant mechanism was studiedusing IR spectra. The results show that the best irradiation technique is using irradiation time of 20s with an intervalof 5 min, and the best heat treatment temperature is 350°C. IR spectra analysis shows that the Si−H and Si−CH3 react with oxygen induced into irradiated PCS to form the structures of Si−OH and C=O. And the bridge structures of Si−O−Si and Si−C−Si have been produced when the irradiated PCS fibers are treated in suitable temperatures. The SiC fiber tubes could be obtained from the precursor fibers with an absorbed dose of 2.0−3.5 MGy and treated by furanidine, and the thickness of the ceramic tube is dependent on the absorbed dose.In order to prepare silicon carbide(SiC) fiber tubes, polycarbosilane precursor(PCS) fibers were irradiated by 10 MeV electron beams(EB) under atmosphere. The effects of irradiation art, heat treatment temperature,and absorbed dose on the performance of SiC fiber tube have been discussed and the relevant mechanism was studiedusing IR spectra. The results show that the best irradiation technique is using irradiation time of 20s with an intervalof 5 min, and the best heat treatment temperature is 350°C. IR spectra analysis shows that the Si−H and Si−CH3 react with oxygen induced into irradiated PCS to form the structures of Si−OH and C=O. And the bridge structures of Si−O−Si and Si−C−Si have been produced when the irradiated PCS fibers are treated in suitable temperatures. The SiC fiber tubes could be obtained from the precursor fibers with an absorbed dose of 2.0−3.5 MGy and treated by furanidine, and the thickness of the ceramic tube is dependent on the absorbed dose.  
        关键词：Polycarbosilane precursor fibers;Electron beam;Irradiation;Silicon carbide fiber tubes   
        2
        |
        0
        |
        5
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834379 false
        发布时间：2023-03-30
      • HAI Zibin,CHEN Jiafu,LIU Huarong
        Vol. 28, Issue 1, Pages: 20-23(2010)
        摘要：Copper sulfide (CuS) submicrometer hollow structures have been synthesized by γ-irradiating in an aqueous SDS-Na2S2O3 solution containing CuCl2 at room temperature and under ambient pressure. The obtained CuS hollow structures were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM). The results indicate that the external diameter and inside diameter of the CuS hollow spheres are about 600 nm and 400 nm 20s, respectively. The shell thickness of the spheres is about 100 nm. It has been investigated that the radiation dose rate and surfactant can effect on the morphology of CuS and the possible formation mechanism of CuS hollow structure has also been discussed.  
        关键词：Copper sulfide;Hollow structure;γ-Irradiation;Surfactant   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834385 false
        发布时间：2023-03-30
      • LIU Yajian,TAN Yuanyuan,ZHANG Yuehong,FU Junjie
        Vol. 28, Issue 1, Pages: 24-28(2010)
        摘要：60Co γ rays irradiation method was used to prepare nano-particle silver in aqueous solution. The structure, morphology, size and the melting point had been characterized by X-ray diffractometer (XRD), Transmission Electron Microscopy (TEM), and Differential Scanning Calorimeter (DSC). The results show that the size of gained particles decreases with increment of PCM concentration and the melting point becomes smaller with decrement of the particle size, while the concentration is changed from 0.6 g/100 mL to 2.2 g/100 mL. The smallest size of silver nano-particle is 19.9 nm, and the melting point is 126.18°C when the concentration is 2.2 g/100 mL. The pure silver nano-particles have been obtained at different pH. It is found that the pH of the aqueous solution has no effect on the constitution of the sample.  
        关键词：Radiation;Silver nano-particle;γ-rays   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834501 false
        发布时间：2023-03-30
      • CUI Guoshi,ZHAO Hongying,SHEN Xinyuan
        Vol. 28, Issue 1, Pages: 29-36(2010)
        摘要：Nanometer silver sol was synthesized via γ-rays liquid irradiation reduction with polyvinyl alcohol as the protective agent, and morphology, size and aggregation state of nano-silver particles were also characterized by TEM, HRTEM, and XRD. Moreover, the relationship between the morphology, size and dispersion and reaction conditions was also investigated and discussed. The result shows that lower absorbed dose and silver nitrate concentration (0.01 mol/L), higher polyvinyl alcohol concentration (7.5%), and suitable isopropanol concentration (0.5 mol/L) prefer to form the smaller size (10−30 nm), monodisperse and good dispersion nano-silver sol, which has been found to be the face-centered cubic single crystal. It could describe the growth mechanism of nanosilver forming process as three steps, crystal nucleation after the silver cation is reduced to Ag, the nucleus growing and forming primary particles, and the second particles form after aggregation of the primary particles.  
        关键词：Nanosilver;Radiation reduction;Growth mechanism   
        2
        |
        0
        |
        2
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834462 false
        发布时间：2023-03-30
      • SUN Quan,HUANG Yuecheng,GAO Fu,LI Bailong,CUI Jianguo,ZHAO Fang,DONG Junrui,CAI Jianming
        Vol. 28, Issue 1, Pages: 37-41(2010)
        摘要：In this study, we synthesized a fullerene derivative C60-Lys via direct reaction of fullerene(C60) and Lysine, whose molecular structure was identified by elemental analysis, infrared spectrum, 1H-NMR and 13C-NMR. It has been found that the chemical C60-Lys has little toxicity on human lymphoblast cell AHH-1. CCK-8 assay and AnnexinV/PI staining assay were performed to evaluate the cell survival rate and apoptosis after γ rays irradiation. The cell survival rate of C60-Lys treatment groups (≤1200 mg/L) shows no significant difference compared with the control group. The results show that pretreatment of cell with C60-Lys(≥400 mg/L) markedly increases the cell survival and decreases the cell apoptosis rate after irradiation exposure in a dose-dependant manner. These results can be suggested that C60-Lys has certain radioprotection effects to AHH-1 cell against radiation induced damages.  
        关键词：Fullerene;Radiation protection;γ- ray;AHH-1 cell;Cell apoptosis   
        2
        |
        0
        |
        1
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834472 false
        发布时间：2023-03-30
      • MEN Tonglin,ZHAO Junhua,ZHAO Yuxia,CAO Liyan,ZHAO Na,LIU Dan,BAI Lu
        Vol. 28, Issue 1, Pages: 42-47(2010)
        摘要：In order to investigate the effect of retinoic acid (RA) on the pathology and Smad3 expression in the pulmonary injury induced by radiation, wistar rats were irradiated with 6MV-X rays linear accelaretor at dose of 15Gy and RA was used as interfering agent by setting control group(group A), treatment group(group B), radiation group(group C) and radiation with RA treatment group(group D). In 1, 2, 4, 8 weeks after irradiation, HE staining and Massion staining were used to detect the pathological change of pulmonary tissues while immunohisto-chemistry staining was used to measure the expression of Smad3 level. The study shows that inflammatory cells exudation occurs in alveolar spaces at one week after irradiation then followed by interstitial edema, shrinkage and destroying of structure. The local consol and collagen fibers appear in pulmonary interstitial at 4 and 8 weeks after irradiation. No significant difference of pathology has been observed between the simple treatment group and the control group, but obviously decrement has been observed in group C and group D. The expression of Smad3 has been enhanced significantly in group C and group D at 1, 2, 4, 8 weeks(p <0.00001)after irradiation compared with that of group A while it is weakened in group D compared with group C, especially at 4, 8 weeks after irradiation. However, no statistical difference has been found between group A and group B. Accordingly, Smad3 does participate in the process of radiation induced lung injury while RA restrains the expression of Smad3 in protein level. And it may provide a useful evaluation to curing of radiation- induced lung injury.  
        关键词：Retinoic acid(RA);Radiation-induced lung injury;Smad3   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834464 false
        发布时间：2023-03-30
      • ZHANG Xiaoxue,WANG Dan,LI Weifeng,XU Changhe,ZHONG Muzhi
        Vol. 28, Issue 1, Pages: 48-52(2010)
        摘要：The different concentrations of 133Cs and 88Sr accumulated by Vicia faba Linn and its irradiation damage effect were studied during cultivation in hydroponic condition. The accumulation of 133Cs and 88Sr was determined by FAAS, the distribution in different organs of Vicia faba Linn and physiological effect of 133Cs and 88Sr were investigated. The results show that at low concentration level the 133Cs and 88Sr taken by above-ground and root of Vicia faba Linn increase with the increment of their initial concentration and the accumulation relationship of contents is roots > above-grounds and 133Cs > 88Sr. When the plantlets exposed to 133Cs or 88Sr, the accumulated amounts increase rapidly at begin then increase slowly along with the cultured time. With the increment of initial concentration the root activities tend to increase at first and then decrease. It has been found that the MDA contents in leaves increase with the experimental time and are higher than that in root while the contents of soluble sugar of 88Sr treated group are higher than that of 133Cs treated group.  
        关键词：Vicia faba Linn;133Cs;88Sr;Accumulation;Damage effect   
        3
        |
        0
        |
        13
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834467 false
        发布时间：2023-03-30
      • LI Shurong,HA Yiming,WANG Shuo,GAO Meixu,ZHOU Hongjie,LI Qingpeng
        Vol. 28, Issue 1, Pages: 53-56(2010)
        摘要：The effects of irradiation on microbiological and sensory qualities of mixture of blanched mustard green and soybean stored at commercial condition and D10 values of pathogens of Listeria innocua were investigated. The results show that D10 value of Listeria innocua inoculated in mixture of blanched mustard green and soybean is 0.264 kGy, and fatality rate of the Listeria irradiated by a dose of 1.2 kGy was 99.996%; Irradiation at doses less than 2.0 kGy does not have significant effects on sensory qualities, and this dose is able to decrease microbe and pathogens of Listeria innocua by 2–3 log and 6 log, respectively. A dose of 2.0 kGy might be applied to ensure the hygienic quality of mixture of blanched mustard green and soybean.  
        关键词：Irradiation;Decontamination;Mixed plant original foods   
        2
        |
        0
        |
        0
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834506 false
        发布时间：2023-03-30
      • LIU Jiangping
        Vol. 28, Issue 1, Pages: 57-61(2010)
        摘要：The mathematical model of Shanghai JPY (SHJPY) 60Co γ-irradiator was established to study the dose mapping of the products treated with 60Co-γ irradiation. The dose distribution of the irradiator in which loaded with 0.1g/cm3 homogenous products was simulated by Monte Carlo method (MCNP) and the statistical uncertainties of program calculation are all within 5%. Our calculation results show that the differences between measurement and computation are below 15%. However most of the differences are below 8%. The dose mapping of the product which simulated by MCNP are in good agreement with measurement data. The mathematical modeling data have confirmed the dose distribution of the products.  
        关键词：Mathematical Modeling;Monte Carlo method;Irradiator;Dose mapping   
        2
        |
        0
        |
        4
        <HTML>
        <L-PDF><Meta-XML>
        <引用本文> <批量引用> 35834504 false
        发布时间：2023-03-30
      0