Autophagy facilitates an IFN-γ response and signal transduction

Autophagy, that is directly triggered by invaded pathogens and indirectly triggered by IFN-γ, acts as a defense by mediating intracellular microbial recognition and clearance. In addition, autophagy contributes to inflammation by facilitating an IFN-γ response and signal transduction. For immune escape, downregulated autophagy may be a strategy used by microbes.     

发酵产鸢尾酮真菌的分离鉴定及生香特性的初步研究

从陈化的鸢尾根状茎分离到产鸢尾酮的丝状真菌,以其作用于新鲜鸢尾根状茎,通过固体发酵产生了鸢尾酮。其中1株Rhizopusoryzae（94Y－01）表现最好。对培养基配方、培养温度、培养时间等发酵条件进行了报道。从发酵物提取得到的浸膏和凝脂,其理化指标分析及香气嗅评与传统鸢尾酮产品类似,经薄层层析和气相色谱－质谱（GC／MS）分析,表明含有鸢尾酮。     

不同微生物的单光束激光陷阱操纵

本文报导了分别采用Ｈｅ－Ｎｅ和Ａｒ＾＋激光器与光不显微镜构成的单光束激光陷阱操纵酵母菌、青霉等不同微生物的实验观察结果,讨论了操纵条件。研究表明：用单光束高会聚激光产生的梯度力操纵微生物体,其有效作用力的大小不仅与激光功率、波长、束腰半径和光束会聚角有关,还与微生物的大小、吸收系数、菌龄及培养方法等因素有关。     

Pectinolytic enzyme production by Bacillus species and their potential application on juice extraction

Five Bacillus strains isolated from decaying vegetable material were cultivated on wheat bran and endo-polygalacturonases, exo-polygalacturonase and pectin lyase activities in the crude enzymatic solution obtained were determined. Highest activity was observed for all enzymes when fermentation was carried out at 28 °C, the highest activity values were obtained after 120 h of cultivation for exo-PG and after 48 h for endo-PG and PL. The use of the enzymatic solution for treatment of fruits and vegetable mash afforded a high juice extraction and a pulp with good pressing characteristics.     

不经培养的农田土壤微生物种群构成及系统分类的初步研究

采用一系列的现代分子生物学技术,避开传统的分离培养过程,探讨自然界中微生物种群的基因多样性。经过直接从土壤中抽提总DNA,并对总DNA中16S rDNA V3可变区序列作PCR扩增、变性梯度凝胶电泳等,对农田土壤微生物种类分布进行初步的研究,发现不同的农田土壤间的菌种差异相当显著,同时对部分农田微生物的系统分类作了初步尝试,为农田土壤微生态和高效菌肥的研究提供了新的实验依据。     

微生物连续培养模型的最优溢流量控制

本文使用最优控制理论研究了微生物连续培养模型的最优溢流量控制问题,导出了一种关于微生物浓度的线性反馈控制律．在该控制律下,可保证微生物连续培养模型能跟踪理想微生物浓度ｘｄ．     

微生物发酵生产紫杉醇研究进展

概述了微生物发酵法生产紫杉醇的研究进展,包括产紫杉醇内生真菌的多样性和真菌产紫杉醇的优势,内生真菌分离、紫杉醇纯化和含量测定方法,同时对如何提高内生真菌紫杉醇产量进行了比较全面的综述。     

微生态系统和微生态制剂的研究进展

阐述了微生态系统和微生态制剂的定义;概述了口腔、咽部、及胃肠道微生态系统的研究现状和发展方向;概述了胃肠道内微生物群的种类、相互作用机制,以及针对胃肠道微生态系统应运而生的微生态制剂的作用原理和种类。并对未来微生态系统的发展和应用领域做出了展望。