成渝城市群知识产权综合服务平台的发展

在成渝城市群知识产权综合服务平台与上海,福建的平台建设现状对比分析的基础上,分析成渝城市群知识产权综合服务平台存在的问题,并针对这些问题提出建立区域成渝城市群知识产权综合服务云建设的建议,为成渝城市群综合科技服务平台建设提供参考和借鉴</p

白光LED用高效荧光粉的制备研究进展

制备具有球形度高、结构均匀、光学性能优异及发射光谱可控的YAG粉体是实现高性能白光LED的关键.本文综述了目前国内外白光LED用高效荧光材料的主要研究成果,并对其主要制备技术的优缺点进行了较详细的分析;在分析总结相关研究的基础上,对目前白光LED用高效荧光粉的研究现状及存在的问题做了简要的概括,最后对其发展前景进行了展望,指出稀土元素的均匀掺杂及颗粒形貌的有效控制是解决白光LED显色性差、发光效率低等问题的有效措施,并提出等离子体方法有可能成为解决上述问题的有效途径之一

白光LED用高效荧光粉的制备研究进展

制备具有球形度高、结构均匀、光学性能优异及发射光谱可控的YAG粉体是实现高性能白光LED的关键.本文综述了目前国内外白光LED用高效荧光材料的主要研究成果,并对其主要制备技术的优缺点进行了较详细的分析;在分析总结相关研究的基础上,对目前白光LED用高效荧光粉的研究现状及存在的问题做了简要的概括,最后对其发展前景进行了展望,指出稀土元素的均匀掺杂及颗粒形貌的有效控制是解决白光LED显色性差、发光效率低等问题的有效措施,并提出等离子体方法有可能成为解决上述问题的有效途径之一

白光LED用高效荧光粉的制备研究进展

制备具有球形度高、结构均匀、光学性能优异及发射光谱可控的YAG粉体是实现高性能白光LED的关键.本文综述了目前国内外白光LED用高效荧光材料的主要研究成果,并对其主要制备技术的优缺点进行了较详细的分析;在分析总结相关研究的基础上,对目前白光LED用高效荧光粉的研究现状及存在的问题做了简要的概括,最后对其发展前景进行了展望,指出稀土元素的均匀掺杂及颗粒形貌的有效控制是解决白光LED显色性差、发光效率低等问题的有效措施,并提出等离子体方法有可能成为解决上述问题的有效途径之一

Physiological effects of ocean acidification and nano-silver on juvenile jellyfish Rhopilema esculenta

Ocean acidification and nanometals pose a threat to marine animals,but the effects of ocean acidification and nanometal stress on jellyfish have not been reported. This study took the large edible jellyfish Rhopilema esculenta from the coastal China as the research object,and the physiological effects of acidification and AgNPs stress on the juvenile jellyfish were studied. The juvenile jellyfishes were exposed to two levels of pH(8.10 and 7.60)and three concentrations of AgNPs(0,20,and 200 mug /L)for 14 days,and their growth,swimming behavior and physiological indicators were measured. The results indicated that seawater acidification could significantly enhance the activities of catalase(CAT)and ion transport enzymes(Ca~(2+)-ATPase and Na~+K~+-ATPase),thereby alleviating the oxidative stress caused by AgNPs on juvenile jellyfish. AgNPs inhibited the activities of acid phosphate phosphatase(ACP),alkaline phosphatase(AKP)and superoxide dismutase(SOD)of juvenile jellyfish and affected energy metabolism,resulting in slow growth rate and redusced pulsation rate. With the increase of AgNPs exposure concentration,acidification led to higher levels of lipid peroxidation and a significant increase inmalondialdehyde(MDA)in jellyfish. This study identified the different physiological responses of juvenile jellyfish to the acidification and AgNPs and provided a reference for evaluating changes in Rhopilema esculenta populations under changing marine environments

Construction of a fine brewer's yeast protoplast fusant GR_5 and its fermentation characteristics

以发酵度较高的非絮凝性的啤酒酵母菌株X6和发酵度较低、絮凝性较强的啤酒酵母菌株N1为亲本进行原生质体融合。用亚硝酸诱变原养型的菌株X6,经筛选得到一株需酪素水解物的营养缺陷型菌株X6~20。采用正交试验法分别优化菌株X6~20和N1的原生质体形成和再生的条件。用X6~20菌株的原生质体作为受体和热灭活的N1菌株原生质体作为供体进行融合。融合株经三角瓶发酵筛选,得到一株较优良的融合株GR5。该融合株的絮凝性较强(本斯值为2.7),以12°Bx麦芽汁为培养基,用500 L的发酵罐在12℃下发酵,发酵至第8 d菌株GR5的发酵度为69.2%,发酵液中的双乙酰含量为0.0498 mg/L、乙醛含量为6.34 mg/L,总高级醇含量为74.4mg/L。融合株GR5具有双亲的优点,发酵的啤酒风味较好,是一株具有工业应用前景的啤酒酿造酵母菌株。Saccharomyces cerevisiae X_6 and N_1 strains were used as the parent strains for protoplast fusion.The strain X_6 was a non-flocculence strain with higher fermentation degree and the strain N_1 was a strain with lower fermentation(degree) and stronger flocculence.The auxotrophic mutant X_(6～20) required casein hydrolysate was derived from the(prototrophic) strain X_6 by treatment of nitrous acid(HNO_2) and nutritional identification.The formation and regeneration conditions of strain X_(6～20) and N_1 protoplast were optimized by orthogonal test method.The protoplast fusants were(constructed) with auxotrophic mutant X_(6～20) protoplasts for receptors and heat-inactivated strain N_1 protoplasts for(suppliers).The fusants obtained were fermented and selected.As a result a fine fusant strain GR_5 was obtained.The flocculence of fusant strain GR_5 was stronger with 2.7 mL of burns value.The content of diacetyl,acetaldehyde,total higher(alcohols) in the(fermented) liquid were 0.0498 mg/L,6.34 mg/L,74.4 mg/L,respectively,and the fermentation degree was(69.2 %) in 500 L fermentor using 12°Bx wort as the medimum at 12℃ for 8 days.The sensory evaluation of the beer produced by the fusant strain GR_5 was nice.The results showed that the fusant strain GR_5 with the fine properties from its parent strains and well(applied) prospect in the beer brewing

新型耐碱蛋白a介质的制备与性能

以蛋白A结构中耐碱性更好的C区为基础,构建一种新型耐碱蛋白A,并偶联至琼脂糖基质,获得新型耐碱蛋白A亲和层析介质,分别用激光共聚焦显微镜和石英晶体微天平研究了人免疫球蛋白(h Ig G)与蛋白A介质的结合过程。结果表明,该介质具有较商品配基更高的结合力和稳定的再生性能,hIgG动态载量达62.0 mg/mL,40次再生操作后载量为初始载量的84%。该介质在抗体纯化领域具有较好的应用前景

新型耐碱蛋白A介质的制备与性能

以蛋白A结构中耐碱性更好的C区为基础,构建一种新型耐碱蛋白A,并偶联至琼脂糖基质,获得新型耐碱蛋白A亲和层析介质,分别用激光共聚焦显微镜和石英晶体微天平研究了人免疫球蛋白(h Ig G)与蛋白A介质的结合过程。结果表明,该介质具有较商品配基更高的结合力和稳定的再生性能,hIgG动态载量达62.0 mg/mL,40次再生操作后载量为初始载量的84%。该介质在抗体纯化领域具有较好的应用前景

新型耐碱蛋白a介质的制备与性能

以蛋白A结构中耐碱性更好的C区为基础,构建一种新型耐碱蛋白A,并偶联至琼脂糖基质,获得新型耐碱蛋白A亲和层析介质,分别用激光共聚焦显微镜和石英晶体微天平研究了人免疫球蛋白(h Ig G)与蛋白A介质的结合过程。结果表明,该介质具有较商品配基更高的结合力和稳定的再生性能,hIgG动态载量达62.0 mg/mL,40次再生操作后载量为初始载量的84%。该介质在抗体纯化领域具有较好的应用前景