Basic fibroblast growth factor alleviates brain injury following global ischemia reperfusion in rabbits

The aim of this study was to explore the protective effect of basic fibroblast growth factor (bFGF) on brain injury following global ischemia reperfusion and its mechanisms. Brain injury following global ischemia was induced by four vessels occlusion and systemic hypotension. Twenty-four rabbits were randomized into three groups: group A, only dissection of vessels; group B, intravenous infusion of normal saline after reperfusion for 6 h; group C, 30 μg/kg bFGF injected intravenously at the onset of reperfusion, then infused with 10 μg/(kg·h) for 6 h. Serum neuron specific enolase (NSE), S-100B, tumor necrosis factor-α(TNF-α), interleukin-1 (IL-1), interleukin-8 (IL-8) were measured before ischemia, 30 min after ischemia, 0.5, 1, 3, 6 h after reperfusion. Brain water content was determined and cerebral histopathological damages were compared. NSE and S-100B were increased 1 h after reperfusion and reached their peaks 6 h after reperfusion, but were much higher in group B than those in group C 3, 6 h after reperfusion. In groups B and C, TNF-a was increased after ischemia and IL-1 and IL-8 were increased significantly 0.5 h after reperfusion, then reached their peaks 6 h, 3 h, 6 h after reperfusion respectively. TNF-a and IL-8 at the time points of 1 h and 3 h and IL-1 at 3 h and 6 h in group C were correspondingly lower than those in group B. These indices in group A were nearly unchanged. There were less severe cerebral histopathological damages in group C compared with group B, but no difference in brain water content. It could be concluded that bFGF alleviates brain injury following global ischemia and reperfusion by down-regulating expression of inflammatory factors and inhibiting their activities.     

应用SP表对在线学习（E—learning）的诊断

以了解学生对在线学习之使用情况，与使用学生自行拟定测验题题库的适当性与否为目标，采用课堂学习搭配在线学习作为课程学习的方式，且由每位学生自行拟定课程最后阶段的测验试题，探讨学生的学习态度、适应情况与此教学策略是否合宜。用S-P表分析等研究表明，在此整个学习过程中，学生的学习态度从被动学习转换成了主动学习，学生对于将传统的课堂教学搭配在线学习的方式感到新奇，对于平时少数有缺课的同学亦可利用在线学习的平台将其在课堂上的不足加以弥补，整体对于学习情况为提升且有成效的。     

日立S-4800冷场发射扫描电镜的BSE功能

S-4800是目前场发射扫描电子显微镜中的高端产品,其独特的电子光学设计使得该仪器在获得二次电子(SE)图像的同时,还能在图像中掺入不同比例的背散射(BSE)信号,以获得二次电子和背散射(SE BSE)的复合图像,背散射信号的加入,既能减轻图像的荷电效应,又能增加图像的成分信息,对分析导电性差的样品,以及不同相的样品提供了方便。     

S-3307处理对高粱植株抗旱能力的影响

用 50mg .kg-1 和 10 0mg .kg-1 S - 330 7处理二叶一心期的高粱幼苗 ,可不同程度地提高植株根冠比 ,提高叶片叶绿素含量和光合作用强度 ,降低呼吸速率 ,减轻膜伤害程度 ,从而提高植物的抗旱性     

集合上的正合列

正合列是模论中研究函子问题的基本工具.将模论中相关的一些方法沿用到集合及S-系中,得到了与模论中相对应的"蛇引理"等,所得的结果将对研究S-系的性质与结构产生影响.     

S_(3307)和PP_(333)对龙眼实生苗生长发育和抗寒力的影响

本试验研究了两种三唑类植物生长延缓剂S_(3307)和PP_(333)对龙眼实生苗生长发育和抗寒力的影响,结果表明:1mg/L的S_(3307)和10mg/L的PP_(333)浸种、浸根均能促进幼苗根系的生长,显著提高根冠比,幼苗断根移栽时,S_(3307)和PP_(333)均能促进主根断口处萌发侧根,使幼苗迅速恢复生长发育,在低浓度下,S_(3307)的“控上促下”活性明显大于PP_(333),高浓度(S_(3307)>50mg/L,PP_(333)>100mg/L)会严重抑制幼苗生长,适宜浓度的S_(3307)和PP_(333)不仅可以加快龙眼砧木育苗速度,而且能明显提高幼苗对低温的抵抗能力。     

海图数据从VPF格式向S-57格式转换的物标属性研究

分析数字海图的VPF格式和S-57格式的特点,及两种格式的物标和属性定义的关系与差异,从VPF格式向S-57格式转换的处理流程,到建立数据编码对照关系的各种方法：直接对应、拆分、合并、重构等各种方法,建立数据从VPF到S-57的编码对照关联,完成海图数据从VPF格式向S-57格式的转换.     

烯效唑对小麦产量及产量因素的影响

本文报道了不同浓度烯效唑在小麦分蘖期、拔节期的喷施效果。研究结果表明：喷施烯效唑能增加小麦的有效穗数、穗实粒数、千粒重，提高小麦产量；于小麦拔节期喷施５０ｍｇ／ｋｇ烯效唑增产效果最佳，每公顷增产达５１６．７千克，增产１３．０％。     

烯效唑浸种对杂交稻秧苗素质及籽粒产量的影响

烯效唑是一种较多效唑效果更好的植物生物延缓物质．研究结果表明：烯效唑浸种处理能有效地降低亩高，增加绿叶数和分蘖数，增加茎基宽、单苗根数和干物质，提高秧苗素质；增加有效穗数、穗粒数．在５０－２００ｐｐｍ浓度范围内浸种，均表现明显的增产作用．其中以１５０ｐｐｍ浸种增产效果最显著，每公顷增产稻谷１２８４．３公斤．当浸种浓度达２５０ｐｐｍ时，明显降低种子发芽率．     

新冠疫苗核心免疫原的专利分析

本文基于已公布的新冠病毒(COVID-19)疫苗专利或文献,分析了我国目前研发的新型冠状病毒疫苗核心免疫原,着重关注其中可能涉及的S-2P知识产权风险,并对我国利用该技术发展相关疫苗提出了建议.