东北红豆杉细胞悬浮培养研究

东北红豆杉（Taxus cuspidata sieb et zucc)幼茎诱导的愈伤组织经多次继代培养，选择生长旺盛，紫杉醇含量高的愈伤组织进行细胞悬浮培养，建立了东北红豆杉细胞悬浮系，同时，对影响愈伤组织进行细胞悬浮培养，建立了东北红豆杉细胞悬浮系，同时，对影响愈伤组织继代培养及细胞悬浮培养的条件进行了研究，确定了适合愈伤组织生长的条件以及影响细胞悬浮培养的主要因素。     

斯坦尼氏小体形态结构的季节性变化初步研究

该文对不同季节人工饲养的雌性鲫鱼斯坦尼氏小体的显微结构、亚显微结构及其形态计量学进行了初步研究.显微结构的研究表明,该小体中腺上皮细胞的多少、排列状况、胞核大小和染色深浅、胞质中分泌颗粒的多少和PAS反应的强弱等均随季节的更替而呈周期性变化.在亚显微结构上,可将该小体的腺上皮分泌细胞分为A、B、C、D、E、F等六种类型.根据各类细胞的细胞器的发达程度和分泌颗粒的多少等结构特征,我们认为:A型细胞是处于颗粒分泌前期的细胞,B型细胞是属于进入分泌阶段的细胞,D、E、F等三种类型的细胞则是处于萎缩或幼稚阶段的细胞,而C型细胞为正趋向成熟的细胞.春季仅见到A、B、C、D四种类型的细胞,夏季B型细胞所占的比例较多,冬季仅出现D、E、F三种类型的细胞.这种显微和亚显微结构随季节更替而变化的规律与形态计量学的研究结果相符.形态计量学上已测到的各项参数表明,春夏季的腺泡和腺上皮细胞处于发育成熟状态,秋季处于萎缩状态,而冬季呈恢复状态.此外,此文还从斯坦尼氏小体的降血钙功能讨论了它与性腺同步发育的关系.     

JAL1杂交瘤细胞的批量培养研究

研究了不同葡萄糖、谷氨酰胺浓度下JAL1细胞的生长、糖耗、乳酸及氨的生成、单抗合成等代谢过程及该株细胞的基本代谢规律，同时对该株细胞生长和单抗生产的动力学方面进行了研究，在细胞培养箱中，采用方瓶批量培养杂交瘤细胞，培养条件为pH7.0-7.5，温度37℃，5％CO2。实验表明，在不同浓度葡萄糖、谷氨酰胺的培养液中，细胞的活性细胞密度、总细胞密度、细胞活性上均有不同，相应地，对细胞的最大比生长速率、葡萄糖最大比消耗速率、乳酸最大比生成速率以及单抗最大比合成速率也有不同程度的影响。实验结果还表明，该株细胞的单抗分泌是属于负生长耦联型的。     

蜂窝移动通信系统的全向小区容量分析

首先推出了容量公式，然后分析了影响容量的若干因素，并将CDMA系统和GSM系统容量进行了比较。     

二元混合物相分离动力学与花样演化(CDS格子气模拟)机理研究

用元胞动力系统（CDS）格子气方法研究二组分混合化样演化若干特性。主要结果是：（1）元胞自身演化映射f的四种不同选取尽管：宏花样”（“黑白花样”）拓扑结构相似，但“微花样”（“灰度花样”）有明显差异，f2和f4所对应的花样在纯黑与纯白区域都存在更加精细的鱼鳞状结构；（2）双嵌段共聚物二组分不对称（即r≠0.5)，在0.4≤r≤0.45范围内出现文献中尚未报道过的“颗粒－条状杂交花样”；（3）首次实施了六方格CDS模型，特别是“叠代过程用六方格，涂色用四方格”，结果表明方六格的确具有各向同性性好，稳定性好等优点；（4）Laplace平均算子《》的不同选取对相变花样影响不大。     

Genistein inhibits human TNF-α-induced porcine endothelial cell adhesiveness for human monocytes and natural killer cells

Cellular immune response is a major barrier to xenotransplantation. Human tumor necrosis factor-α (hTNF-α) possesses cross-species activity and directly amplifies the immune rejection via the upregulation of adhesion molecules on porcine endothelium. We investigated the role of protein tyrosine phosphorylation in the induction of expression of E-sclectin and vascular cell adhesion molecule-1 (VCAM-1), and the augmentation of adhesion of human peripheral blood monocytes (PBMo) and natural killer cells (PBNK), after rhTNF-α-stimulation of porcine aortic endothelial cells (PAEC) in vitro, rhTNF-α-increased adhesiveness of PAEC for both PBMo and PBNK was dose-dependently reduced by pretreatment of PAEC with the selective protein tyrosine kinase (PTK) inhibitor genistein. The inhibitory effect occurred at the early time of PAEC activation triggered by rhTNF-α, and was completely reversible. PTK activity assay indicated that genistein also suppressed rhTNF-α stimulated activation of protein tyrosine kinases (PTKs) in PAEC in a dose-dependent manner. Flow cytometric analysis showed that genistein inhibited the upregulation of E-selectin and VCAM-1 by rhTNF-α. These results suggest that PTKs may regulate the expression of E-selectin and VCAM-1 on PAEC and the adherence of PBMo and PBNK induced by rhTNF-α. Moreover, dietary genistein, used as an adhesion antagonist, may contribute to managing the cell-mediated rejection in the clinical application.     

Reductase activity of human thioredoxin-like protein and its effects on cell apoptosis

Thioredoxin is a ubiquitous dithiol oxidoreductase found in many organisms and involved in numerous biochemical processes. Human thioredoxin-like protein (hTRXL) is differentially expressed at different development stages of human fetal cerebrum and belongs to an expanding family of thioredoxins. Recombinant hTRXL and truncated hTRXLs corresponding to the N-terminal (hTRXL-N) and C-terminal (hTRXL-C) domains are expressed and purified. In insulin disulfide reduction assay, both full-length hTRXL and hTRXL-N show reducing activity for the insulin disulfide bonds. As expected, the hTRXL-C failed to reduce insulin. MCF-7 cell stably transfected with hTRXL cDNA exhibits increased sensitivity to apoptosis induced by phorbol myristic acetate (PMA) and ionomysin.     

嗅神经鞘细胞移植恢复大鼠损伤脊髓的功能

为探讨嗅神经鞘细胞移植恢复大鼠损伤脊髓的功能 ,将成年大鼠分为脊髓半切洞损伤组 (A组 )和脊髓半切洞损伤 嗅神经鞘细胞移植组 (B)组 ,手术后应用联合行为评分 (CBS)感觉诱发电位 (SEP)和运动诱发电位 (MEP)检查 ,测定脊髓功能恢复情况 .结果 2组CBS得分 ,A组 >B组 ,SEP和MEP潜峰时均A组 >B组 ,统计学分析均有显著性差异 (P <0 0 5 ) .表明移植嗅神经鞘细胞能恢复损伤脊髓的功能     

超氧化物歧化酶及其模拟研究

超氧化物歧化酶 (SOD)作为一种生物活性酶 ,在治疗由氧化应激所导致的疾病方面有着非常广阔的应用前景 .本文综述了国内外近年来有关 SOD的存在和结构、SOD活性的测定及模拟等方面的研究进展 .