生物成因文石的FTIR光谱特征

对13种文石质软体动物贝壳的内外壳层进行了较系统的FTIR光谱测量,并重点对文石的ν1,ν2及v43个内振动模式的频率与贝壳壳层位置的关系进行了分析.结果表明,文石的ν1,ν4带在所有的样品中未存在频率位移现象,且与合成文石的相关谱带的频率一致,但ν2带频率与贝壳壳层的位置有密切关系.在同一生物种类贝壳中,所有样品内壳层文石的ν2带频率均大于外壳层.随贝壳种类的不同,内外壳层ν2带频率位移的范围为0.5～4.5 cm-1.关于文石质贝壳内外壳层红外光谱中ν2带存在频率位移的现象是首次报道.

一种生物纳米材料对核辐射的天然防护和损伤修复

核能作为一种新型的节能环保能源,正逐渐进入民用生活中。但核能的广泛应用却带来了一些严重问题,如核辐射废物处理问题,核辐射灼伤等。因此,核辐射的有效防护和修复提上日程。文章阐述的贝壳,是一种天然生物纳米材料,产量丰富无污染,而且具有较好的核素吸附能力和修复核辐射带来的灼伤,这种新型材料可为生物材料的研究和核辐射的防护带来福音。

Bacteriological Analysis of the Digestive Tube of the Mud Snail (Bullacta exarata Philippi) and Its Rearing Shoal

The bacterial flora in the digestive tube of Bullacta exarata Philippi and its rearing shoal were investigated. A total of 157 strains of heterotrophic bacteria, isolated from crop, stomach intestine and other parts of the digestive tube, mainly belong to the genera Photobacterium, Bacillus, Pseudomonas Vibrio and some genera of the family Enterobacteriaceae. There are significantly more varieties of bacteria in crop than in stomach and intestine. A total of 173 strains of bacteria were isolated from the rearing shoal, belonging to 13 genera. The 5 predominant genera, such as Bacillus and Photobacterium, are the same as those in the digestive tube, but greatly differ in percentages. The number of heterotrophic bacteria and Vibrio in rearing shoal change in line with the alteration of the temperature, and are significantly affected by the use of pesticides.

绿色产品——EC-SJ杀生灭藻剂

上海久宏电力技术开发有限公司研发生产的EC-SJ杀生灭藻剂为工业水处理剂中的非氧化性杀生灭藻剂,无毒、易降解、在水生贝壳类软体动物和藻类表面分散成膜,使之窒息而死,并非靠毒杀,有缓蚀、阻垢等综合性能.用于发电厂等行业循环冷却水系统,专用来杀灭贝壳类软体动物和藻类,提高热效率,保护循环水不受添加药剂污染,保护设备,确保发电机组或其他冷却水系统设备安全经济运行.