荧光增白剂在无磷洗衣粉中效能讨论

以常用表面活性剂LAS、AEO—9和助剂结晶型层状硅酸钠、4A沸石、荧光增白剂VBL、31配成实验用无磷洗衣粉。通过粉体白度实验，去污实验和循环洗涤实验，考察了荣光增白剂在洗衣粉中的效能．实验结果表明：添加荧光增白剂使物体白度提高；去污力比值提高，荧光增白剂VBL、31在农洗衣粉中的最佳添加量其质量分数是0.15%。     

A system for screening agonists targeting β2-adrenoceptor from Chinese medicinal herbs

In order to develop a model for screening the agonists of human 132-adrenoceptor from Chinese medicinal herbs extracts, we used a cell-based functional assay based on a common G protein-coupled receptor (GPCR) regulation mechanism and destabilized enhanced green fluorescent protein (d2EGFP) reporter gene technique. The positive cell clone was confirmed by real-time polymerase chain reaction (PCR) and imaging analysis. To assess the value of this model, we screened over 2000 high performance liquid chromatography (HPLC)-fractionated samples from the ethanol extracts of Chinese medicinal herbs. Six fractions (isolated from Panax japonicus, Veratrum nigrum, Phellodendron amurense, Fructus Aurantii Imrnaturus, Chaenomeles speciosa, and Dictamnus dasycarpus) showed significant effects on active reporter gene expression, three of which (isolated from Phellodendron amurense, Fructus Aurantii lmmaturus, and Chaenomeles speciosa) were selected for further concentration re-sponse analysis and the half maximal effective concentration (ECI/2 max) values were 4.2, 2.7, and 4.8 μg/ml, respectively.Therefore, this reporter gene assay was suitable for screening β2-adrenoceptor agonists. The results suggest that the six herbal extracts are the possible agonists of β2-adrenoceptor.     

荧光灯镇流器的发展现状及展望

介绍了电感式镇流器、电子式镇流器、谐振式镇流器的优缺点,指出了它们的发展方向．     

大黄素作为镁离子荧光分子探针的行为研究

以纯化后的大黄素为荧光探针分子,考察了其对不同金属离子荧光响应情况.实验结果表明,大黄素与Mg2+以2∶1的络合比形成强荧光配合物(λmax=599 nm),Mg2+浓度在0¹.05×10-5mol/L与荧光发射强度呈良好的线性关系,并通过条件优化,建立了对Mg2+含量检测具有高选择性、高灵敏度的荧光分析体系.     

钯与溴代菲的相互作用及其应用研究

Pd2＋与9-溴菲（9-BrP）生成稳定配合物,能对9-BrP产生显著的的荧光增敏效应。9-BrP-Pd2＋体系的最大激发和发射波长分别为247和364nln。荧光加强理论计算表明9-BrP与Pd2＋形成了配位数为n=3的配合物,结合常数K-A为2．812×10-4,线性相关系数r2=0．9983。9-BrP—Pd2＋体系荧光强度在Pd2＋浓度为1×10-7～2×10-5mol／L的范围内呈现良好的线性关系（r2=0．9962）。Pd2＋与9-BrP反应具有选择性和专一性,常见金属离子不会对其造成干扰。水样测定与加标回收实验结果也较为理想（回收率〉100％）,表明9-BrP作为荧光探针用于检测水体中Pd2＋的方法具有可行性。