利用基于飞秒超快激光的太赫兹时域光谱(terahertz time domain spectroscopy,THz-TDS)对D-木糖、D-核糖、D-阿拉伯糖、D-来苏糖及相关的五元糖进行了研究,得到了它们在0.1～2.0THz波段的THz-TDS吸收谱图.不同糖类化合物的吸收谱表现出明显的特征,表明THz-TDS技术可以分辨化合物结构上的微小差异,可以应用于物质检测与分析.同时还研究比较了不同旋光性五元糖的THz-TDS光谱.
The degradation of aniline, p-nitroaniline and m-chloroaniline by electron beam irradiation was studied. Re- moval of aniline, p-nitroaniline and m-chloroaniline reached 95% at an initial concentration of 0.5mmol/L at 23kGy. The results showed that electron beam irradiation is an effective process for the degradation of aniline and its derivatives.
Aqueous dye solutions were irradiated by Co γ-rays or electron beams and the irradiation induced decolora- 60 tion and degradation of the dyes were studied with UV/visuable absorption spectra and pH value measurement. In addition, (Chemical oxygen demand, COD) removal rate of the irradiated solutions, and synergetic effect of hy- drogen peroxide and the irradiations, were investigated, The results show that the combination of radiation tech- nology and other wastewater treatment can be a promising process for treating dyeing and finishing waste effluents.
通过对溶菌酶活性的测量以及利用十二烷基磺酸钠-聚丙烯酰胺凝胶电泳(Sodium dodecyl sulfateolyacrylamide gel electrophoresis,SDS-PAGE)对光照后稳态产物的分析,证实在紫外可见波段光照射下杜醌能够诱导溶菌酶的光敏损伤,导致溶菌酶结构破坏和活性降低。研究发现,溶菌酶的光敏损伤途径和损伤产物与杜醌浓度、光照时间、体系的气氛等密切相关,在氮气条件下为I型光敏损伤机制,在有氧条件下对溶菌酶的损伤是以II型反应为主的I型和II型协同作用的结果。同时考察了抗氧化剂–羟基肉桂酸类衍生物对溶菌酶的保护作用。
