Effects of irradiated and non-irradiated Ergosan extract(alginic acid) on rainbow trout growth performance and skin mucosal immunity were compared. Ergosan was irradiated at 30 kGy in a cobalt-60 irradiator. A total o...Effects of irradiated and non-irradiated Ergosan extract(alginic acid) on rainbow trout growth performance and skin mucosal immunity were compared. Ergosan was irradiated at 30 kGy in a cobalt-60 irradiator. A total of 252 fish(128.03±9.4 g) were randomly divided into four equal groups,given the basal diet either unsupplemented with Ergosan(control group) or supplemented with crude Ergosan(5 g/kg),ethanol-extracted Ergosan(0.33 g/kg) or irradiated Ergosan(0.33 g/kg) according to this protocol: basal diet for 15 days,treatment diet for 15 days,basal diet for 10 days and treatment diet for 15 days. Highest growth performance was observed in fish fed irradiated Ergosan(P<0.05). Dietary administration of different Ergosan types did not cause any changes in mucus protein level,but improved alkaline phosphatase level and hemagglutination titer compared with the control(basal diet without Ergosan) on day 55 offeeding trial(P<0.05). Furthermore,the highest value of lysozyme activity was observed in gamma-irradiated Ergosan on day 55. In conclusion,gamma-irradiated Ergosan at 0.33 g/kg was found to improve growth performance and mucus biological components significantly in comparison with the control group(basal diet without Ergosan).展开更多
Radiation source （）60Co was used to radiate acrylic and fibrin, then to induct both graft polymerization reaction, and synthesize high water absorption fibrin. This paper studies the influence of different proportio...Radiation source （）60Co was used to radiate acrylic and fibrin, then to induct both graft polymerization reaction, and synthesize high water absorption fibrin. This paper studies the influence of different proportions of fibrin and acrylic acid and radiation dosages on performance of graft polymerization. The result indicates that graft polymerization has relatively high water absorption amounts and speed when mfibre∶mAcrylicacid∶mwater=1∶1∶10 and radiation dosage reaches 0.2 million Rader. It can absorb over 300g of ionic water per g and can absorb over 250g of tap water per g.展开更多
Membranes prepared from bovine tendon collagen and bovine skin collagen were irradiated by （）60Co.Dose rate about 22kGy/h and the doses applied were 15,25,35kGy.The degree of cross-linking and the stability of the m...Membranes prepared from bovine tendon collagen and bovine skin collagen were irradiated by （）60Co.Dose rate about 22kGy/h and the doses applied were 15,25,35kGy.The degree of cross-linking and the stability of the membranes were evaluated by measuring swelling,resistance to collagenase digestion,and infra-red spectra.Based on these data,possible mechanisms of action were discussed.The results revealed that after the films were modified by （）60Co irradiation at the experimental conditions,both the degree of cross-linking and the stability of two kinds of collagen membranes were increased.Reconstituted bovine skin collagen films were more sensitive to （）60Co irradiation than bovine tendon collagen films.展开更多
[Objective] This study aimed to investigate the mutagenic effect of cobalt- 60 irradiation on potato. [Method] Potato tubers of Favorita and Zhongshu No.3 were irradiated with 5, 10, 20, 30, 50 and 70 Gy of cobalt-60 ...[Objective] This study aimed to investigate the mutagenic effect of cobalt- 60 irradiation on potato. [Method] Potato tubers of Favorita and Zhongshu No.3 were irradiated with 5, 10, 20, 30, 50 and 70 Gy of cobalt-60 γ-ray respectively, to explore the mutagenic effect of different doses of γ-ray heavy ion irradiation on potato. [Result] The results showed that the emergence rate, seedling rate, plant growth, yield and commodity of potato varied after irradiated with different doses of cobalt-60 γ-ray; 10Gy of cobalt-60 irradiation played a positive effect on the growth and development of potato, while high doses played a negative effect on the growth and development of potato. After cobalt-60 irradiation, the botanical traits of M1 gen- eration varied greatly, resulting in a number of beneficial mutation traits; some traits of M2 and M3 generations became stably inherited. [Conclusion] Cobalt-60 irradiation breeding is conducive to the variety improvement and germplasm innovation as an effective means of genetic improvement for potato.展开更多
Around the world, radioactive sources have been widely used for decades to benefit humankind; industry food; health, etc. However, the malicious use of radiological sources poses a significant threat globally. As Irra...Around the world, radioactive sources have been widely used for decades to benefit humankind; industry food; health, etc. However, the malicious use of radiological sources poses a significant threat globally. As Irradiation facility for research the goal of this paper is to show a case study of application of nuclear security and nuclear security culture code of contact in irradiation facility using cobalt 60. And it will show the necessary work done to achieve the goal of protection of radioactive material and continue working in safe conditions. This objective could not be achieved without the collaboration of all department involved in security and nuclear safety. In this work we applied the nuclear security and nuclear security culture procedures in order to define the type of system used to achieve the global objective in accordance with Global Threat Reduction Program to reduce the threat of a RDD （Radiological Dispersion Device） in collaboration with The United States Department of Energy＇s NNSA （National Nuclear Security Administration）. The objective of this paper is to share a local experience in upgrading security with return of experience in practice and very good collaboration with general direction of national security and all departments involved in security and nuclear safety.展开更多
基金Supported by the Research Affairs of University of Tabriz,Iran and Nuclear Science and Technology Institute,Karaj,Iran
文摘Effects of irradiated and non-irradiated Ergosan extract(alginic acid) on rainbow trout growth performance and skin mucosal immunity were compared. Ergosan was irradiated at 30 kGy in a cobalt-60 irradiator. A total of 252 fish(128.03±9.4 g) were randomly divided into four equal groups,given the basal diet either unsupplemented with Ergosan(control group) or supplemented with crude Ergosan(5 g/kg),ethanol-extracted Ergosan(0.33 g/kg) or irradiated Ergosan(0.33 g/kg) according to this protocol: basal diet for 15 days,treatment diet for 15 days,basal diet for 10 days and treatment diet for 15 days. Highest growth performance was observed in fish fed irradiated Ergosan(P<0.05). Dietary administration of different Ergosan types did not cause any changes in mucus protein level,but improved alkaline phosphatase level and hemagglutination titer compared with the control(basal diet without Ergosan) on day 55 offeeding trial(P<0.05). Furthermore,the highest value of lysozyme activity was observed in gamma-irradiated Ergosan on day 55. In conclusion,gamma-irradiated Ergosan at 0.33 g/kg was found to improve growth performance and mucus biological components significantly in comparison with the control group(basal diet without Ergosan).
文摘目的:建立龙胆和秦艽的高效液相色谱指纹图谱分析方法,用于分析钴60辐照前后龙胆和秦艽的成分含量变化情况。方法:以C18柱(250 mm×4.6 mm,5μm)为色谱柱,0.1%醋酸溶液-乙腈为流动相,梯度洗脱,在240 nm波长处检测。以未辐照样品为对照,按龙胆15个特征峰、秦艽13个特征峰,采用夹角余弦法计算经系列剂量辐照后样品的相似度。以各特征峰的峰面积/称样量为参数,比较辐照后样品对未辐照样品的变化百分率。并对4个已知成分马钱苷酸、獐芽菜苦苷、龙胆苦苷和当药苷按外标法进行定量。结果:龙胆与秦艽中龙胆苦苷的含量随辐照剂量的增加呈明显下降的趋势,龙胆中峰1(未知峰)辐照后含量有所增加,秦艽中獐芽菜苦苷含量有较明显下降。由于没有峰个数的增加或缺失,辐照前后指纹图谱的相似度很高,但呈现出随辐照剂量的增加相似度减小的趋势。采用外标法对已知4个成分定量,测得未经辐照的3批龙胆样品中4个成分的含量范围为:马钱苷酸0.37%~0.39%,獐芽菜苦苷0.12%~0.14%,龙胆苦苷2.7%~3.1%,当药苷0.035%~0.036%;经辐照25 k Gy后,4个成分的含量范围为:马前苷酸0.35%~0.36%,獐芽菜苦苷均为0.11%,龙胆苦苷1.1%~1.3%,当药苷0.032%~0.035%。未经辐照的3批秦艽样品中4个成分的含量范围为:马钱苷酸0.64%~0.98%,獐芽菜苦苷0.06%~0.25%,龙胆苦苷1.4%~2.2%,当药苷0.043%~0.054%;经辐照25 k Gy后,4个成分含量范围为:马前苷酸0.60%~0.84%,獐芽菜苦苷0.047%~0.18%,龙胆苦苷0.65%~1.3%,当药苷0.038%~0.048%。结论:所建立的指纹图谱方法验证结果良好,能够满足龙胆、秦艽辐照前后成分含量变化研究的要求。本文得到的龙胆、秦艽整体成分含量变化情况为中药合理利用辐照灭菌手段提供了参考。
文摘Radiation source （）60Co was used to radiate acrylic and fibrin, then to induct both graft polymerization reaction, and synthesize high water absorption fibrin. This paper studies the influence of different proportions of fibrin and acrylic acid and radiation dosages on performance of graft polymerization. The result indicates that graft polymerization has relatively high water absorption amounts and speed when mfibre∶mAcrylicacid∶mwater=1∶1∶10 and radiation dosage reaches 0.2 million Rader. It can absorb over 300g of ionic water per g and can absorb over 250g of tap water per g.
文摘Membranes prepared from bovine tendon collagen and bovine skin collagen were irradiated by （）60Co.Dose rate about 22kGy/h and the doses applied were 15,25,35kGy.The degree of cross-linking and the stability of the membranes were evaluated by measuring swelling,resistance to collagenase digestion,and infra-red spectra.Based on these data,possible mechanisms of action were discussed.The results revealed that after the films were modified by （）60Co irradiation at the experimental conditions,both the degree of cross-linking and the stability of two kinds of collagen membranes were increased.Reconstituted bovine skin collagen films were more sensitive to （）60Co irradiation than bovine tendon collagen films.
基金Supported by Youth Fund of President of Anhui Academy of Agricultural Sciences (11B0324)~~
文摘[Objective] This study aimed to investigate the mutagenic effect of cobalt- 60 irradiation on potato. [Method] Potato tubers of Favorita and Zhongshu No.3 were irradiated with 5, 10, 20, 30, 50 and 70 Gy of cobalt-60 γ-ray respectively, to explore the mutagenic effect of different doses of γ-ray heavy ion irradiation on potato. [Result] The results showed that the emergence rate, seedling rate, plant growth, yield and commodity of potato varied after irradiated with different doses of cobalt-60 γ-ray; 10Gy of cobalt-60 irradiation played a positive effect on the growth and development of potato, while high doses played a negative effect on the growth and development of potato. After cobalt-60 irradiation, the botanical traits of M1 gen- eration varied greatly, resulting in a number of beneficial mutation traits; some traits of M2 and M3 generations became stably inherited. [Conclusion] Cobalt-60 irradiation breeding is conducive to the variety improvement and germplasm innovation as an effective means of genetic improvement for potato.
文摘Around the world, radioactive sources have been widely used for decades to benefit humankind; industry food; health, etc. However, the malicious use of radiological sources poses a significant threat globally. As Irradiation facility for research the goal of this paper is to show a case study of application of nuclear security and nuclear security culture code of contact in irradiation facility using cobalt 60. And it will show the necessary work done to achieve the goal of protection of radioactive material and continue working in safe conditions. This objective could not be achieved without the collaboration of all department involved in security and nuclear safety. In this work we applied the nuclear security and nuclear security culture procedures in order to define the type of system used to achieve the global objective in accordance with Global Threat Reduction Program to reduce the threat of a RDD （Radiological Dispersion Device） in collaboration with The United States Department of Energy＇s NNSA （National Nuclear Security Administration）. The objective of this paper is to share a local experience in upgrading security with return of experience in practice and very good collaboration with general direction of national security and all departments involved in security and nuclear safety.
