Sr4Al14O25:Eu长余辉发光的特性研究

对Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ的激光发光谱、发射光谱、长余辉发光的特性和耐光性进行系统的研究，并与传统的ＺｎＳ：Ｃｕ夜光粉进行了性能对比，结果表明：Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ是一种性能更加优良的长余辉发光材料。     

复合催氧化法处理生物难降解性有机废水

对于一些染料及其中间体生产过程中产生的废水，直接采用生化法处理往往较困难，采用化学氧化法处理效果较理想，臭氧氧化即是其中的一种，为了提高臭氧的氧化效果，降低处理成本，本研究采用某些金属氧化物、金属盐、Ｈ２Ｏ２、ＮａＣｌＯ与Ｏ３组成复合催化氧化体系，对难生物降解的水溶性染料，进行了处理研究，试验获得了满意的结果。     

一些有机染料和中间体的SHG效应

采用固体粉末方法，测试了苯系偶氮、嘧啶、吡啶酮、四氢喹啉甲川型染料，以及中间体共６２个有机分子的ＳＨＧ效应，发现其中１４个品种具有ＳＨＧ活性。考察了影响ＳＨＧ效应的有关因素，发现电子效应基本一致的硝基和氰基取代染料，呈现出完全不同的ＳＨＧ性质。说明电子效应并不是影响有机分子ＳＨＧ活性的唯一因素，ＰＰＰ－ＭＯ理论计算结果也证实了这点。     

染料废水的综合处理

采用硫酸钡、高岭土等无机物来吸附染料废水中的有机染料，使染料废水的ρ(CODCr)从1万多下降至1400mg／L左右，同时得到副产物纸用颜料，对无机物吸附后的废水，进一步用电化学氧化和活性炭吸附处理，使废水的ρ(CODCr)继续下降至100mg／L以下，而达到国家一级排放标准。     

交流电中性线电流的讨论

本文主要讨论中性线电流过大的原因、给出减小中性线电流的措施。     

颗粒级配对水泥基材料有害孔隙率的影响

水泥基材料的硬化浆体中含有大量的孔隙 ,其中的有害孔隙直接影响到耐久性 .依据所建立的微粒级配模型 ,采用粉煤灰、硅灰等球形颗粒掺合料及纳米纤维红粉 (NR)掺合料 ,设计球形颗粒紧密堆积体系与纳米纤维增强紧密堆积体系 ,讨论 2种混合体系内部的总孔隙率与有害孔隙率之间的关系 ,确定活性NR粉在水泥基材料中的作用 .研究表明 ,NR粉能够增加体系密实度 ,水泥混合体系硬化后期的总孔隙率与有害孔隙率之间服从对数关系 ,通过微粒级配模型可预知体系有害孔隙率及颗粒级配的合理性 .     

Regulation of BMP4 on the proliferation and differentiation in SVZa neural stem cells

The neural stem cells in the anterior subventricular zone (SVZa) mainly generate the progenitors that will differentiate into neurons, and along a highly circumscribed migratory access Rostral migratory stream (RMS), they migrate to the olfactory bulbs (OB). To understand the effects of BMPs on SVZa neural stem cells, in this study BMP4 at various concentrations was used to induce SVZa neural stem cells, and the living cell labeling using BMP4 promotor conjugated with red fluorescence protein showed the expression of BMP4 dynamically. The results demonstrated that low BMP4 doses (1-5 ng/mL) promoted while high doses (10-100 ng/mL) inhibited the proliferation of SVZa neural stem cells, and BMP4 promotedneuron differentiation in the early stage (1-3 d), howeverm, it inhibited the neuron commitment after 4 d. Noggin, the antagonist of BMP4, blocked the physiological effects of BMP4. In OB, BMP4 is mainly to accelerate the progenitors to withdraw from the cell cycle and trigger the differentiation, and in RMS, it promotes the proliferation of committed progenitors and not differentiation, further in SVZa, BMP4 enhances astrocyte commitment.     

Dynamics of proteins in Golgi membranes: comparisons between mammalian and plant cells highlighted by photobleaching techniques

In less than a decade the green fluorescent protein (GFP) has become one of the most popular tools for cell biologists for the study of dynamic processes in vivo. GFP has revolutionised the scientific approach for the study of vital organelles, such as the Golgi apparatus. As Golgi proteins can be tagged with GFP, in most cases without altering their targeting and function, it is a great substitute to conventional dyes used in the past to highlight this compartment. In this review, we cover the application of GFP and its spectral derivatives in the study of Golgi dynamics in mammalian and plant cells. In particular, we focus on the technique of selective photobleaching known as fluorescence recovery after photobleaching, which has successfully shed light on essential differences in the biology of the Golgi apparatus in mammalian and plant cells.     

加速科技进步促进"红三角"经济繁荣

当今社会,科技进步对经济增长的影响越来越深远．实现“红三角”经济繁荣,必须充分重视科技进步对经济增长的促进作用．