Sol—gel法制备WO3电致变色薄膜

本文采用Ｓｏｌ－ｇｅｌ法，用Ｎａ２ＷＯ４水溶液经质子交换树脂获得ＷＯ３溶胶，用浸涂法制备无色透明非晶ＷＯ３薄膜。ＷＯ３非晶薄膜显微结构疏松，表面有微裂纹，是良好的快离子导体，加负电压使其注入Ｌｉ＾＋离子引起钨离子还原而着色。经５００℃热处理后的ＷＯ３薄膜主要含斜方ＷＯ３晶相，显微结构致密，表面微裂纹闭合，不利于Ｌｉ＾＋离子注入，几乎无变色现象。     

半导体激光血管内照射对人体的免疫调节作用

报道了半导体激光血管内照射对人体外周血Ｔ淋巴细胞亚群及ＮＫ细胞的免疫调节作用，实验结果提示：在２３例患者中经波长６５０ｎｍ，功率５ｍＷ的半导体激光血管内照射治疗１次，５次和１０次的患者中，ＣＤ３＾＋细胞亚群的百分率与照射前（６３．６６％）比较，分别提高到６５．８６％，６９．９４％，７５．０４％；ＣＤ４＾＋Ｔ辅助细胞在第十次治疗后也有所增加，半导体激光血管内照射对ＮＫ细胞及ＣＤ４＾＋／ＣＤ８＾＋具有     

Er_2Fe_(17)C_xN_y系稀土化合物Er_2Fe_(17)CN自旋重定转换温度的穆斯堡尔谱分析

在温度为２９５Ｋ～８０Ｋ范围内，应用穆斯堡尔效应方法，测量了Ｅｒ２Ｆｅ１７ＣｘＮｙ系稀土化合物Ｅｒ２Ｆｅ１７ＣＮ的穆斯堡尔谱．结果表明，用Ｃ，Ｎ原子掺杂渗入Ｅｒ２Ｆｅ１７化合物替换Ｅｒ３＋离子后形成的Ｅｒ２Ｆｅ１７ＣＮ化合物，影响了Ｅｒ２Ｆｅ１７化合物原来的自旋重定转换温度ＴＣ，并使自旋重定转换角度θ也发生了变化，出现了两个自旋重定转换温度ＴＣ１，ＴＣ２．ＴＣ１２００Ｋ，ＴＣ２８０Ｋ．这说明稀土化合物Ｅｒ２Ｆｅ１７ＣＮ磁矩是突变的（一级相变）．     

南京牛首山地区植物区系的特点及与邻近植物区系的关系

在对南京牛首山地区进行植物调查和标本采集的基础上,进行了该地区植物区系基本组成科、属、种的分析,对其植物区系特点进行了总结,并与相似纬度的南京幕府山开发保护区、盱眙铁山寺自然保护区以及安徽黄山风景区3个地点的植物区系进行了R/T比值的比较,以及相似性系数的比较。结果表明,牛首山与幕府山植物在属的相似性上最大;牛首山与铁山寺植物在种的相似性上最大。     

Evaluation of virus removal in MBR using coliphages T4

A membrane bioreactor (MBR) with gravity drain was tested for domestic wastewater for 65 days. Resultss howed that the effluent quality was excellent, and met with the reuse water standard of China (GB/T 18920-2002). Virus removal in the membrane separation process was investigated by employing coliphages T4 as a tracer. Two microfiltration membrane modules, with pore sizes of 0.22 and 0.1 μm, were used to investigate their effects on virus rejection at the transmembrane pressure of 8.5 kPa. It was found that 0.1 μm membrane had complete rejection of virus, and 0.22 μm membrane had significant rejection of virus. In the longterm operation of this MBR, no significant difference was observed between both pore sizes because the virus concentrations of the effluent in both cases were in the same order. Effluent virus concentration at steady state of MBR running was less than 2 PFU/mL. The removal ratios of coliphage T4 in MF processes were more than 10^5.5. The membrane surface deposits played an important role in the rejection of virus. The formation of cake clay on the membrane surface was the main cause of high rejection of colipbage T4 with MF of 0.22 μm.     

广义逆A_(T，S)~(2)的几种等价表示式及其应用

给出了广义逆A_(A,S)~(2)的一种新的表示式,推广了Zlobec公式,证明了广义逆A_(T,S)~(2)的4种表示式子间的等价关系,并给出了它的应用。     

Dual regulatory effects of resveratrol on activation of NF-κB and cell proliferation in human embryonal kidney 293 cells

Resveratrol (3,4‘,5-trihydroxystilbene, Res), a naturally occurring polyphenol, exhibits antioxidant, antiinflammatory, potential chemopreventive and chemotherapeutic properties in preclinical studies. To further understand its potential clinical efficacy and safety, effect of Res at 10^-9-10^-4 mol/L on human embryonal kidney (HEK293) cell proliferation and its potential mechanism were investigated in present study. Cell viability was detected by using trypan blue dye exclusion method. Cell cycle and apoptosis were analyzed by flow cytometry with propidium iodide stain.Activation of nuclear factor-κB (NF-κB) was determined by luciferase reporter gene assay using stably transfected HEK293/κB-luc cells. Secretion of human interleukin-8(hlL-8) was measured by ELISA. Our results show that HEK293 cell proliferation was significantly stimulated by 10^-7 mol/L Res after treatment for 48 hours, or by 10^-8-10^-7mol/L Res combinated with 10 ng/mL TNFα for 24 h, but was suppressed by 10^-4 mol/L Res with or without TNFα. Both endogenous and TNFα-induced NF-κB activation were downregulated by Res at 10^-7 mol/L, but were upregulated at 10^-4 mol/L. With 10^-4 mol/L Res, the content of secreted IL-8 was increased, and apoptosis rate was increased from lessthan 5 % to 10%, together with significant cell-cycle arrest in S phase. TNFα has coordinative effects with Res on HEK293 cell apoptosis, cell-cycle arrest and IL-8 secretion. These results indicate that Res promotes cell proliferation at low concentration through down-regulation of NF-κB activation in HEK293, but suppresses its growth at high concentration through up-regulation of NF-κB activation, increasing IL-8 and cell-cycle arrest. As resveratrol has dual regulatory effect on cell proliferation in vitro, comprehensive evaluation of its potential clinical utility is needed.     

湖北麦冬脱毒苗的生长发育与产量效应研究

通过田间试验和盆栽对比试验对湖北麦冬茎尖脱毒苗与未脱毒苗的生长发育和产量进行了比较．结果表明，茎尖脱毒苗的产量极显著地高于未脱毒苗；单株分蘖数、块根数、根系活力均显著地高于未脱毒苗；茎尖脱毒苗和未脱毒苗的折干率差异不显著．     

山茶科珍稀濒危植物圆籽荷的繁殖生物学研究

圆籽荷是中国特有的单种属稀有植物,历年来对其研究较少.对圆籽荷的分布现状,生境,有性生殖过程,种子散布等进行了观察分析,结果显示,在自然条件下,圆籽荷主要以有性生殖为主,能正常地开花结实,同时在一些环境下存在着分蘖方式的营养繁殖;圆籽荷为严格的异花授粉植物,昆虫主要为蜂类起重要的传粉作用,种子主要靠重力散布.