A new distribution principle of bus protection is presented.The protection system description,its design features,hardware structure,construction of data communication network are given.Dynamic simulation experiments ...A new distribution principle of bus protection is presented.The protection system description,its design features,hardware structure,construction of data communication network are given.Dynamic simulation experiments show its distinguishing advantages over traditional centralized principle.展开更多
A total of 328 yeast strains from seawater, sediments, mud of salterns, the guts of marine fish and marine algae were obtained. The results of routine identification and molecular methods show that five yeast strains ...A total of 328 yeast strains from seawater, sediments, mud of salterns, the guts of marine fish and marine algae were obtained. The results of routine identification and molecular methods show that five yeast strains obtained in this study belonged to Pichia spp., including Pichia guilliermondii 1 uv-small, Pichia ohmeri YF04d, Pichia fermentans YF12b, Pichia burtonii YF11A and Pichia anomala YF07b. Further studies revealed that Pichia anomala YF07b could produce killer toxin against pathogenic yeasts in crabs while Pichia guilliermondii luv-small could produce high activity of extracellular inulinase. It is advisable to test if Pichia ohmeri YF04d obtained in this study is related to central-venous-catheter-associated infection.展开更多
Maternity insurance fund is an important part of social insurance fund. It plays an important role in safeguarding the rights and interests of pregnant women and improving the welfare of women. With the expansion of t...Maternity insurance fund is an important part of social insurance fund. It plays an important role in safeguarding the rights and interests of pregnant women and improving the welfare of women. With the expansion of the balance of the birth insurance fund, the balance of income and expenditure has become a difficult goal to be reached. Therefore, this paper aims to evaluate the operating efficiency of the birth insurance fund, discover the problems of the birth insurance system, and put forward some suggestions to improve the efficiency of the birth insurance fund and promote the perfection of the birth insurance.展开更多
A new synthetic method of leonurine was developed. Leonurine 1 was synthesized from the key intermediates 4 and 5, two compounds with high solubility in dichloromethane which allowed the synthetic procedure to be perf...A new synthetic method of leonurine was developed. Leonurine 1 was synthesized from the key intermediates 4 and 5, two compounds with high solubility in dichloromethane which allowed the synthetic procedure to be performed under mild conditions and afforded 1 with a good yield. Comparing the previous methods, the yield was increased from 30% to 54%, time consumed was significantly reduced as well.展开更多
Cryopreservation techniques for mammalian oocytes and embryos have rapidly progressed during the past two decades,emphasizing their importance in various assisted reproductive technologies.Pregnancies and live births ...Cryopreservation techniques for mammalian oocytes and embryos have rapidly progressed during the past two decades,emphasizing their importance in various assisted reproductive technologies.Pregnancies and live births resulting from cryopreserved oocytes and embryos of several species including humans have provided proof of principle and led to the adoption of cryopreservation as an integral part of clinical in vitro fertilization.Considerable progress has been achieved in the development and application of the cryopreservation of mammalian oocytes and embryos,including preservation of the reproductive potential of patients who may become infertile,establishment of cryopreserved oocyte banks,and transport of oocytes and embryos internationally.However,the success rates are still far lower than those obtained with fresh oocytes and embryos,and there are still obstacles that need to be overcome.In this review,we address the major obstacles in the development of effective cryopreservation techniques.Such knowledge may help to eliminate these hurdles by revealing which aspects need improvement.Furthermore,this information may encourage further research by cryobiologists and increase the practical use of cryopreservation as a major part of assisted reproductive technologies for both humans and animal species.展开更多
In this study, a yeast@ZIF-8 core–shell composite material was successfully synthesized under room temperature in aqueous solution. The ZIF-8 shell endowed the inner yeast cells with a considerably extended lifetime ...In this study, a yeast@ZIF-8 core–shell composite material was successfully synthesized under room temperature in aqueous solution. The ZIF-8 shell endowed the inner yeast cells with a considerably extended lifetime without any nutrients at 4°C. Compared with the bare yeast cells, most coated yeast cells were kept alive even when cultured in zymolyase solution for 3h. Furthermore, the encapsulated yeast cells could be reactivated and regrown by dissolving the ZIF-8 shell with competitive coordination interactions.展开更多
The Yangtze’s environmental protection is paramount regardless of its economic development The Yangtze River,flowing more than6,300 km across China,has been witness to many epic events,inspired numerous idyllic poems...The Yangtze’s environmental protection is paramount regardless of its economic development The Yangtze River,flowing more than6,300 km across China,has been witness to many epic events,inspired numerous idyllic poems,and nurtured a large number of booming towns during the country’s long history.展开更多
文摘A new distribution principle of bus protection is presented.The protection system description,its design features,hardware structure,construction of data communication network are given.Dynamic simulation experiments show its distinguishing advantages over traditional centralized principle.
文摘A total of 328 yeast strains from seawater, sediments, mud of salterns, the guts of marine fish and marine algae were obtained. The results of routine identification and molecular methods show that five yeast strains obtained in this study belonged to Pichia spp., including Pichia guilliermondii 1 uv-small, Pichia ohmeri YF04d, Pichia fermentans YF12b, Pichia burtonii YF11A and Pichia anomala YF07b. Further studies revealed that Pichia anomala YF07b could produce killer toxin against pathogenic yeasts in crabs while Pichia guilliermondii luv-small could produce high activity of extracellular inulinase. It is advisable to test if Pichia ohmeri YF04d obtained in this study is related to central-venous-catheter-associated infection.
文摘Maternity insurance fund is an important part of social insurance fund. It plays an important role in safeguarding the rights and interests of pregnant women and improving the welfare of women. With the expansion of the balance of the birth insurance fund, the balance of income and expenditure has become a difficult goal to be reached. Therefore, this paper aims to evaluate the operating efficiency of the birth insurance fund, discover the problems of the birth insurance system, and put forward some suggestions to improve the efficiency of the birth insurance fund and promote the perfection of the birth insurance.
基金National Science Foundation of China (Grant No. 21002013)New Teacher Foundation from Ministry of Education in China (Grant No. 20090071120)+2 种基金Foundation of State Key Laboratory of Natural and Biomimetic Drugs (K20100106)National Basic Research Program of China (973 Program,Grant No. 2010CB912600)STCSM (Grant No. 10431903200)
文摘A new synthetic method of leonurine was developed. Leonurine 1 was synthesized from the key intermediates 4 and 5, two compounds with high solubility in dichloromethane which allowed the synthetic procedure to be performed under mild conditions and afforded 1 with a good yield. Comparing the previous methods, the yield was increased from 30% to 54%, time consumed was significantly reduced as well.
基金supported by grants from the National High Technology Research and Development Program of China(2011AA100602)the National Science and Technology Major Project of China(2013ZX08007-004,2013ZX08008-004)the National Natural Science Foundation of China(31371486)
文摘Cryopreservation techniques for mammalian oocytes and embryos have rapidly progressed during the past two decades,emphasizing their importance in various assisted reproductive technologies.Pregnancies and live births resulting from cryopreserved oocytes and embryos of several species including humans have provided proof of principle and led to the adoption of cryopreservation as an integral part of clinical in vitro fertilization.Considerable progress has been achieved in the development and application of the cryopreservation of mammalian oocytes and embryos,including preservation of the reproductive potential of patients who may become infertile,establishment of cryopreserved oocyte banks,and transport of oocytes and embryos internationally.However,the success rates are still far lower than those obtained with fresh oocytes and embryos,and there are still obstacles that need to be overcome.In this review,we address the major obstacles in the development of effective cryopreservation techniques.Such knowledge may help to eliminate these hurdles by revealing which aspects need improvement.Furthermore,this information may encourage further research by cryobiologists and increase the practical use of cryopreservation as a major part of assisted reproductive technologies for both humans and animal species.
基金supported by the National Key Basic Research Program of China (2014CB931801 and 2016YFA0200700)the National Natural Science Foundation of China (2189038, 21721002 and 21475029)+1 种基金Frontier Science Key Project of Chinese Academy of Sciences (QYZDJ-SSW-SLH038)K. C. Wong Education Foundation
文摘In this study, a yeast@ZIF-8 core–shell composite material was successfully synthesized under room temperature in aqueous solution. The ZIF-8 shell endowed the inner yeast cells with a considerably extended lifetime without any nutrients at 4°C. Compared with the bare yeast cells, most coated yeast cells were kept alive even when cultured in zymolyase solution for 3h. Furthermore, the encapsulated yeast cells could be reactivated and regrown by dissolving the ZIF-8 shell with competitive coordination interactions.
文摘The Yangtze’s environmental protection is paramount regardless of its economic development The Yangtze River,flowing more than6,300 km across China,has been witness to many epic events,inspired numerous idyllic poems,and nurtured a large number of booming towns during the country’s long history.
