TS-1分子筛合成与苯羟基化反应性能考察

以TEOS、TBOT和自制的w =20 % TPAOH 水溶液为原料,合成了TS- 1 分子筛,并经IR、XRD和Raman 光谱等手段证实。用该分子筛作催化剂对芳烃羟基化催化性能进行考察,并在实验的基础上推测了TS- 1 分子筛催化芳烃直接羟基化的反应历程。     

富锗面包的研制

富锗面包是以面包专用粉为主要原料,以白砂糖、奶油、奶粉、鸡蛋、面包改良剂为辅料,加入富锗酵母,采取快速发酵法,经过调粉、发酵、烘烤精制而成。通过正交实验确定产品的最佳配方,利用ICP-AES方法测定富锗面包中有机锗的含量。     

固体激光器的快速电光Q开关驱动电路的实验研究

比较了三种不同的电光调Q驱动电路。电子管式调Q电路工作稳定,退压沿70ns左右,但空间体积大,激光脉冲能量较低;雪崩管串联武调Q电路退压时间大约为20ns,输出激光脉冲能量高,脉宽窄;MOSFET管串联调Q电路,简单可靠,单管耐压高,退压时间为50ns。     

煤岩破坏电磁辐射记忆效应特性及产生机制

通过实验研究了不同加载方式下的煤岩破坏电磁辐射记忆效应特性;借助细观损伤力学和电磁动力学等理论,对煤岩内部结构损伤扩展及电磁辐射产生机制进行了分析。结果表明,煤岩破坏电磁辐射具有记忆效应特性,但记忆最大历史应力、纵向应变的能力明显优于记忆横向应变和体应变的能力,受载煤岩损伤破坏过程的不可逆性是煤岩破坏电磁辐射产生记忆效应的直接原因。     

Restoration of vision after transplantation of photoreceptors

Cell transplantation is a potential strategy for treating blindness caused by the loss of photoreceptors. Although transplanted rod-precursor cells are able to migrate into the adult retina and differentiate to acquire the specialized morphological features of mature photoreceptor cells, the fundamental question remains whether transplantation of photoreceptor cells can actually improve vision. Here we provide evidence of functional rod-mediated vision after photoreceptor transplantation in adult Gnat1?/? mice, which lack rod function and are a model of congenital stationary night blindness. We show that transplanted rod precursors form classic triad synaptic connections with second-order bipolar and horizontal cells in the recipient retina. The newly integrated photoreceptor cells are light-responsive with dim-flash kinetics similar to adult wild-type photoreceptors. By using intrinsic imaging under scotopic conditions we demonstrate that visual signals generated by transplanted rods are projected to higher visual areas, including V1. Moreover, these cells are capable of driving optokinetic head tracking and visually guided behaviour in the Gnat1?/? mouse under scotopic conditions. Together, these results demonstrate the feasibility of photoreceptor transplantation as a therapeutic strategy for restoring vision after retinal degeneration.     

高河菜提取物对小鼠肠推进和胃排空的影响

目的:研究高河菜提取物对小鼠消化道动力的影响.方法:采用炭末推进实验观察高河菜提取物对阿托品所致小鼠小肠推进抑制的影响;采用甲基橙胃残留率的方法观察高河菜提取物对阿托品所致小鼠胃排空抑制的影响.结果:高河菜提取物2g/kg能明显拮抗阿托品对小鼠小肠推进抑制的作用;高河菜提取物2g/kg、1g/kg和0.5g/kg均能拮抗阿托品对小鼠胃排空抑制的作用.结论:高河菜提取物对阿托品所致小鼠胃肠功能障碍有明显的改善作用.