烟草内生细菌Atp-oe的防治作用及发酵研究

筛选获得的烟草内生细菌Atp-ce在温室试验中对烟草黑胫病的防效可达69.23%.通过对烟草内生细菌Atp-oe发酵动力学的研究,拟合出了细菌生长曲线模型,得到最佳优化发酵参数.     

粉煤灰在硅酸盐菌剂中的应用

通过比较不同粉煤灰添加量的吸附剂对硅酸盐菌剂质量的影响,得出添加量为20%-40%为好,以30%效果最佳.并通过盆栽试验考察其应用效果,结果显示,添加粉煤灰的处理极显著好于空白处理,与纯草炭处理效果相当.     

广西象州温泉嗜热菌的分离与鉴定

采集广西象州温泉水样,用常规的稀释涂布法分离和纯化嗜热菌,并选择其中1株编号为XZ2K 2的菌株进行形态观察、生理生化鉴定和16S rDNA序列分析。结果从温泉水中分离得到9个菌株,XZ2K 2菌株的革兰氏染色阳性,无芽孢,细胞呈杆状,最适生长温度为70~75℃,最适的生长pH值为7.0~7.5.初步鉴定该菌株为布氏栖热菌(T herm us brockianus)。     

梦清园景观水体生态净化系统示范工程研究

根据上海面临的水环境问题,在苏州河梦清园设计并运行一套景观水体水质净化生态组合工艺,该工艺包括水质强化净化部分和水质稳定部分.运行该工艺对苏州河河水进行处理,为期一年的连续运行和监测结果表明,该处理工艺能够明显改善景观水体的景观效果和有效的削减进水中的氨氮和总氮、总磷,年平均去除率分别到达70%、23%和38%.     

稠油降解菌的筛选及其生物表面活性剂的特性

添加稠油对土壤中土著微生物进行驯化, 分离出33株能以稠油为惟一碳源生长的细菌, 从中筛选出2株高效表面活性剂产生菌XJ1和SJ4, 9株高效稠油降解菌. XJ1和SJ4可将发酵液的表面张力由72.4 mN/m分别降到36.1 mN/m和36.2 mN/m;14 d摇瓶油降解率分别为35.89%和31.59%, 降解效率在各单菌中最高. 同时研究了发酵液中XJ1和SJ4的生长量与其生物表面活性剂产生情况之间的关系, 经红外光谱分析初步确定两种生物表面活性剂均为糖脂类化合物.     

[FeFe] hydrogenases and their evolution: a genomic perspective

Most hydrogenases (H2ases), the enzymes that produce or oxidize dihydrogen, possess dimetallic active sites and belong to either one of two phylogenetically distinct classes, the [NiFe] and the [FeFe] H2ases. These families of H2ases share a number of similarities regarding active site structure and reaction mechanism, as a result of convergent evolution. They are otherwise alien to each other, in particular with respect to protein sequence and structure, maturation mechanisms, and distribution among the realms of life. One of the interesting features of [FeFe] H2ases is their occurrence in anaerobic bacteria, anaerobic protists, and mitochondriate eukaryotes. They thus have the potential to report on important evolutionary events, including transitions from the prokaryote to the eukaryote lifestyle. Genome sequences yield a variety of [FeFe] H2ase sequences that have been implemented to shed light on the evolution of these proteins and their host organisms.     

核电厂应急准备的代价利益分析

简要介绍了核电厂应急计划区的划分方法和国际上先进堆应急计划的安全要求;阐述了应急准备代价利益分析的原则思想,并介绍了构建的分析模型;最后给出了应急准备代价和利益比较的结果。     

工程菌固定化生物滤池除臭效能影响研究

试验采用工程菌固定化生物过滤去除H2S和NH3。考察了最大容积负荷及其影响因素,并对相应的机理进行了分析。容积负荷不超过20 g.(m-3.h-1)时,工程菌固定化生物滤池对H2S和NH3的去除率均能达到99%以上,H2S和NH3容积负荷分别超过80 g.(m-3.h-1)和50 g.(m-3.h-1)或者停留时间小于20 s时,去除效率迅速降低。通过反冲洗可以降低滤池的压降,提高除臭效率,反冲洗后通气12 h和72 h,滤池对硫化氢和氨气的去除趋于稳定。     

Enhanced Biological Phosphorus Removal in Anaerobic/Aerobic Sequencing Batch Reactor Supplied with Glucose as Carbon Source

Phosphorus removal performance in an aerobic/aerobic sequencing batch reactor （SBR） supplied with glucose as carbon source was investigated. It was found that there was no phosphate release concomitant with the storing of poly-β-hydroxyalkanoate （PHA） during the anaerobic phase. Whereas, glycogen was soon built up followed by rapid consumption, at the same time, glucose was depleted rapidly. Based on the analysis of different fractions of phosphorus in activated sludge, the relative ratio of organically bound phosphorus in sludge changed at the end of anaerobic and aerobic phases. The ratios were 45.3% and 51.8% respectively. This showed that the polyphosphate broke down during the anaerobic phase to supply part of energy for PHA synthesis. The reason why there was no phosphate release might be the biosorption effect of extracellular exopolymers （EPS）. It was also proved by the analysis of EPS with scanning electron microscopy （SEM） combined with energy dispersive spectrometry （EDS）. The phosphorus weight percentage of EPS at the end of anaerobic phase was 9.22%.     

三配位五价磷化学

对具有Ｒ－Ｐ（＝Ｘ）（＝Ｙ）结构的三配位五价磷化合物的结构特点、成键及光谱性质、合成方法及化学反应性能作了一描述。比较详细地讨论了以二配位磷化合物、三配位三价磷化合物以及四配位五价磷化合物为原料的合成方法，主要讨论了三配位五价磷化合物的亲电反应性以及与不饱和化合物进行的环加成反应。