胶质红假单胞菌J2菌株光合产氢的研究

选择苹果酸为碳源，谷物酸为氮源，对胶质红假单胞菌Ｊ２菌株进行光照分批及连续培养产氢试验，分批试验最大产氢活性为每克干细胞每小时产氢１３．３８ｍｌ。连续试验持续１５天以上，平均产氢速率为每克干细胞每小时产氢１２．０１ｍｌ。此后进行了固定化细胞光合产氢的研究，选择角叉菜聚糖作为固定化载体，结果表明，固定化细胞在产氢活性的保持和反应稳定性等方面明显优于游离细胞，连续培养时，平均产氢速率为每克干细胞每小时     

Two sulfur-containing ansamycin antibiotics fromStreptomyces albolongus

Summary Two sulfur-containing ansamycin antibiotics were isolated from the culture broth ofStreptomyces albolongus C-46366; the major one was identical with awamycin and the minor one was a new ansamycin antibiotic, ansathiazin. Their structures were elucidated from their reactions and spectroscopic analyses. These antibiotics were active against gram-positive bacteria, acid-fast bacteria and a protozoan.We thank Dr I. Umezawa for his generous gift of awamycin. We are grateful to Drs K. Morita, Y. Nakao, H. Okazaki and H. Ono for their interest throughout this work. Thanks are also due to Messrs Y. Kono, K. Koyama, H. Fujiuchi and Y. Nakano, and Mrs K. Jinno for their skillful technical assistance.     

乳酸菌的细菌素及乳链菌肽在食品工业中的发酵与应用

乳酸菌的细菌素是具有抗菌活性的多肽、蛋白质或蛋白质复合物，其中 乳链菌肽是一种广泛应用的高效，无毒的天然食品防腐剂，评述了乳酸菌素的分类剂乳链菌肽在食品工业中的发酵和应用前景。     

长庆油田金属管材的腐蚀性细菌类群研究

对长庆油田 10 1站和马岭 4 2 # 井注入水、原油及油水混合样品中可引起金属管材腐蚀的细菌进行分离、鉴定。结果表明 ,这些样品中都含有硫酸盐还原菌 (Sulfate reducingBacteria ,SRB)、铁细菌 (IronBacteria ,IB)及少量硫杆菌。其中硫酸盐还原菌种类较多 ,主要为脱硫弧菌属和脱硫肠状菌属。铁细菌主要为纤发菌属 (Leptothrix)、赭色菌属 (Ochrobium)及鞘铁菌属 (Siderocapsa) ;各样品中的硫杆菌主要是脱氮硫杆菌。硫酸盐还原菌与铁细菌的存在对采油管线造成了腐蚀危害 ,讨论了这类细菌在油田的分布 ,以便更有效地防止油田环境中微生物对金属管材的腐蚀。     

印染废水脱色菌的选育及脱色研究

富集筛选出具有良好脱色活性的混合菌Ａ，并从中分离出单菌Ｎ和Ｆ，以去除和印染废水中的红颜色，接种量为１．２５％，温度为３０℃的静置培养以及ｐＨ为７的条件时，以尿素代替蛋白陈作为部分氮源，可降低培养基成本，且脱色率为８０％。     

光合细菌处理高浓度制革废水的研究

该文提出采用三级内装软性纤维填料的生物接触氧化槽连续处理工艺，利用光合细菌对制革废水中的高浓度有机废水进行处理。通过试验，确定的工艺条件为进水ＣＯＤ浓度８０００ｋｇ／Ｌ左左，接种活性污泥进行２４ｈ可溶化处理，白天自然为光照、夜间人工光照或黑暗，间歇曝气造成瘘性好氧条件（ＤＯ０．５－２０ｍｇ／Ｌ），ＰＳＢ处理时间为７２ｈ，连续处理小试结果ＣＯＤ和Ｓ＾２－的平均去除率分别为９０．４％和９８．０％，ＢＯ     

耐高渗酵母发酵生产甘油过程中杂菌污染的探讨

从菌种培养、生产发酵、流加补料等方面初步探讨了发酵生产甘油过程中杂菌污染的途径。     

蛭弧菌指示和净化海水的研究

厦门近岸海水海洋噬菌蛭弧菌的数量与海水中弧菌类的数量成正相关．灭菌海水中只加蛭弧菌，其数量出现负增长．若同时加入蛭弧菌和宿主菌鳗弧菌８９２７菌株，则蛭弧菌数增加、增加速率随宿主菌浓度增加而增加，并导致宿主菌数减少，此时宿主菌随培养时间延长而减少，但减少速度缓慢，１５ｄ仅减少２６％．     

细菌灭蝗剂对原核生物致突变性的研究

按Ａｍｅｓ法的要求，采用常规点试法，与经和不经代谢活化渗入法以及改良的平板渗入法，检测了不同剂量的细菌灭蝗剂对一组组氨酸缺陷型供试菌株的致突变性。结果表明，所用试验剂量的细菌灭蝗剂对供试菌株均无诱发突变作用，从而推测细菌灭蝗剂对哺乳动物无潜在的致突变性。     

Possible origin of zeaxanthin in the marine sponge,Reniera japonica

As part of a study to clarify the origins of biologically active substances in marine sponges, the carotenoids produced by two species of marine bacteria,Flexibacter sp. strain number DK30213 and DK30223, associated with the marine sponge,Reniera japonica, were investigated. Both bacteria were found to produce zeaxanthin [(3R, 3R)-dihydroxy-,-carotene] which is widely distributed in marine organisms. This carotenoid was also detected in the host sponge, suggesting the transport of zeaxanthin from the microorganisms to the host. As zeaxanthin plays the role of a quencher and scavenger for active species of oxygen, it is presumed that the sponge accumulates the bacterial product as a defense substance against the active oxygen species produced under irradiation by strong sunlight. It is thought that the bacteria are symbionts of the host sponge and act by obtaining the solid substrate and medium needed for settlement and growth from the host, and by producing and transmitting the biologically active substance to the host. Zeaxanthin-producing bacteria are also considered to have potential for practical uses by the aquacultural, pharmaceutical and food industries.