十二烷基糖苷脱醇方法的研究

采用蒸发法和蒸发-结晶法对十二烷基糖苷进行了脱醇研究,确定了适宜的脱醇条件.所得十二烷基糖苷中残余十二醇含量小于1%.     

T8荧光灯中的条纹放电研究

Ｔ８荧光灯是一种高效节能照明光源,但在不环境温过低,放电电流太小时,它常常条纹电,对照明造很成大干扰。研究条纹放电的成因和特性是解决这一问题的先决条件。首先从放电等离子体的基本方程出发,求得非均匀等离子体正柱中的色散关系;由此通过计算得到条纹放电形成条件,条纹放电的频率、相速度和时间增长率等主要参数。     

Fluorescent pigments in corals are photoprotective

All reef-forming corals depend on the photosynthesis performed by their algal symbiont, and such corals are therefore restricted to the photic zone. The intensity of light in this zone declines over several orders of magnitude--from high and damaging levels at the surface to extreme shade conditions at the lower limit. The ability of corals to tolerate this range implies effective mechanisms for light acclimation and adaptation. Here we show that the fluorescent pigments (FPs) of corals provide a photobiological system for regulating the light environment of coral host tissue. Previous studies have suggested that under low light, FPs may enhance light availability. We now report that in excessive sunlight FPs are photoprotective; they achieve this by dissipating excess energy at wavelengths of low photosynthetic activity, as well as by reflecting of visible and infrared light by FP-containing chromatophores. We also show that FPs enhance the resistance to mass bleaching of corals during periods of heat stress, which has implications for the effect of environmental stress on the diversity of reef-building corals, such as enhanced survival of a broad range of corals allowing maintenance of habitat diversity.     

荧光碳点在环境监测中的应用研究

为了解新型荧光碳点表面经钝化修饰后,赋予其相关的反应活性及靶向选择性,及碳点的日益多样化应用,特别是环境分析上广阔的应用前景,详细地论述了荧光碳点应用于检测环境中的重金属离子、微生物、无机阴离子及有机污染物等,并展望了碳点在环境监测中的发展方向.     

表面活性剂对水溶性荧光聚合物PPESO_3荧光性质的影响

研究几种不同类型的表面活性剂对所合成的新型水溶性荧光聚合物PPESO3(聚[5,3-二(3-磺酰化丙氧基)-1,4-苯撑乙烯])的作用. 结果表明, 阴离子表面活性剂SDS可使PPESO3荧光发生猝灭; 中性表面活性剂使得聚合物的荧光显著增强; 阳离子表面活性剂一般情况下也会使聚合物荧光增强. 利用表面活性剂对荧光聚合物的荧光增强作用可使这类聚合物成为一种新型的具有高灵敏性的荧光化学传感器.     

Synthesis of glucoside compounds of ferrocenyl phenols and their antianemic activity

Six glucoside compounds have been synthesized by means of phase-transfer catalytic method and deacetylation from the starting material ferrocene. Their structures have been confirmed by elementary analysis, IR,¹HNMR and MS. The antianemic activities of some compounds have also been tested. Results indicate that these glucoside compounds possess the antianemic activities and therefore, the further study is well worth making. Supported by the foundation of Wuhan Metropolis Commission of Science and Technology Liu Huiying: born in 1937, Professor     

Chromaticity Characteristics of Fluorescent Dyes in Cloth

IntroductionTheapplicationoffluorescentdyesiseverincreasingintextiles,paperandotherrelatedindustriestoimpartbrightnesstothecolorsofchildren swear ,costumesforstageartists,packingmaterials,advertisingdisplayandroadsafety signals.Thesefluorescentcolorantsabsorbra diantenergyintheshorterwavelengthregionofthevisiblespectrumandradiatelightatlongerwavelength .Tounder standthechromaticcharacteristicsofthefluorescentcol orants[1] ,itisnecessarytodrawchromaticitydiagramsandcalculatecolorattributes .Unf…     

多功能蓝光荧光材料研究进展

有机电致发光器件(OLED)被认为是最具竞争力的下一代平板显示器和固态照明光源,而高效蓝光材料的开发是实现OLED商业化的最重要前提之一。蓝光材料固有的高能隙使电荷很难注入到发光材料中,导致蓝光电致发光器件性能较差。为了提高器件效率,可以从器件结构和材料结构两方面进行优化。就材料本身而言,通过改变分子结构,在蓝光材料的结构中引入电荷传输单元,构建多功能蓝光材料,能有效改善电荷的注入和传输。根据分子中引入的功能基团的不同,多功能蓝光荧光材料可分为空穴传输型、电子传输型及双极传输型3种,分别对这3类蓝光材料进行综述,介绍了该领域的最新研究进展。     

采用微波辅助离子液体催化合成辛基糖苷

采用已内酰胺与对甲基苯磺酸制备一种离子液体(CP-ptsa),并用核磁共振氢谱对该离子液体进行表征。以该离子液体作催化剂,在微波辅助条件下研究用葡萄糖与正辛醇合成辛基糖苷的反应条件。用吡啶作探针的红外图谱证明该离子液体是一种Brφnsted酸。研究结果表明:与常用的糖苷合成方法相比,微波的辐射可以缩短辛基糖苷的反应时间,而对产率的影响不大;在优化后的合成条件下,即微波功率为600 W,反应温度为120℃,反应时间为10 min,醇糖物质的量比为6-1,催化剂的质量为葡萄糖质量的4%时,产率可以达到72%;经柱色谱纯化后的产物纯度为98%。用核磁共振碳谱确认了产物的糖苷键结构。     

照相镜头设计中非球面的应用

利用非球面在改善成像质量方面的优势,在镜头设计过程中引入了偶次非球面,根据理论计算和ZEMAX软件的优化,设计出一个成像质量优良的高斯镜头,通过该实例对球面设计和非球面设计进行了比较,论证了非球面在照相镜头设计中的优越性．     

用于检测肼的小分子荧光探针的研究进展

肼在化工、材料、制药、能源领域都有广泛的运用,但它对环境和人体有很大的毒害。因此,开发具有高选择性和高灵敏度的N_2H_4荧光探针具有重要的科学意义和应用价值。该综述总结了近几年来基于不同识别机理检测N_2H_4的小分子荧光探针的研究进展。     

荧光渗透法无损检测的原理与应用

论述了荧光渗透法无损检测的原理和检测非铁磁性材料表面开口缺陷的方法,同时介绍了荧光渗透法无损检测的过程。该检测方法操作简单,具有较高的捡测灵敏度。