摘要：基于生物素对蛋白的亲和作用,对川楝素结构中不影响原有活性的基团进行了结构修饰,采用川楝素C-29合成了6个衍生物,为后续连接生物素提供了物质基础。

摘要：1,2,3-三唑,巯基1,2,4-三唑,1,3,4-噻二唑以及相关衍生物具有重要的生物活性,在医药、工农业应用研究中引起广泛关注.为了在同一个化合物中连接较多的活性基团,我们设计并成功合成了8个全新的杂环化合物.这些化合物的质谱具有非常特征的裂解方式,本文根据文献[1～4]对其进行了解析.……

摘要：丝素蛋白是一种天然高分子纤维蛋白,由18种氨基酸组成,具有良好的生物相容性,在生物医学材料等领域,受到了科学研究及应用技术开发人员的青睐。为了满足实际应用中不同方面的需求,本文通过化学方法对丝素蛋白进行各种改性,可以获得更多优良特性,从而可以根据不同应用要求设计出具有针对性特征的丝素蛋白基材料。丝素蛋白中大量存在的活性基团也给丝素材料的化学改性提供了良好的基础。本文总结了丝素蛋白化学改性的主要方法和改性效果,讨论了丝素蛋白改性在纺织、生物医药和环境科学等领域中应用的最新研究进展,可为相关的研究和应用开发提供参考。

摘要：为了从微观层面上探寻易自燃煤体低温氧化过程中活性基团的反应机理,基于煤的低温氧化模拟实验平台,采用ESR技术,分析煤体低温氧化过程中自由基反应特性。实验表明:随着煤体氧化温度的升高,自由基种类先增加后减少,自由基浓度持续升高了48.3%,氧化温度升高至100℃时,自由基种类最多,自由基浓度由缓慢增加了10.2%开始转变为急剧增加了31.7%。自由基浓度和种类在100℃有1个拐点,100℃是煤体低温氧化的容许最高温度,在深部易自燃煤层抽采和采空区遗煤自燃治理过程中,煤体局部或整体温度达到100℃后,必须采取有效措施及时抑制煤体升温,这对于深部易自燃煤层开采与采空区遗煤自燃治理过程中自燃预测预报和防灭火非常重要。

摘要：Hamamatsu R1924A is one of the most widely used photomultiplier tubes(PMTs) in nuclear *** the active base suitable for R1924A is still not available in market, an active base is designed for Hamamatsu R1924A PMT, and the test results at high counting rates are presented. The active bases with two different sets of resistor chains were tested and compared by a frequency-controlled green straw hat LED light. A stable signal output up to 100 kHz is achieved using frequency-controlled LED pulsed light. The temperature of bases, which reflects the power consumption and is crucial for applications in vacuum, is also monitored with the same LED pulsed light. The temperature of the active base with smaller resistances reaches about twice of that of the active base with larger resistances in the resistor chain. For the applications in vacuum, the active base with resistance between the two sets of resistor chains may be preferable.

摘要：多巴胺是贻贝中粘附蛋白的有效成分,拥有很强的黏附性能,几乎可以黏附在任何材料表面.弱碱性条件下易发生氧化自聚合反应,在基材表面形成聚多巴胺(PDA)涂层.涂层表面包含的邻二苯醌、引哚、儿茶酚、羧基和氨基等活性基团可为基体提供二次反应平台,用于制备各种功能层.为了缩短多巴胺聚合沉积时间,提高涂层的稳定性,发展了多巴胺快速聚合沉积技术,扩大了其应用范围.综述了多巴胺的快速聚合技术的发展研究及在纺织领域的应用现状.

摘要：For further understanding of self-heating of coal,we tested the reactions of seven different ranks of coal under inert *** the test,50-gram of coal sample ranged from 0.18 mm to 0.38 mm was put into a special designed copper reaction vessel and let pure nitrogen to flow into the coal sample from the bottom at a rate of 100 mL/*** programmed temperature enclosure was run at a programmed rate of 0.8 °C/*** concentration of the carbon oxides and the coal temperature were *** results show that the coal reactions under inert atmosphere can generate CO and *** reactions under inert atmosphere are affected by coal ranks,initial pore structure of coal and sulfur *** low ranks of coal,the productions of carbon oxides are *** coal temperature is lower than the surrounding temperature throughout the reactions under inert atmosphere,but it rises quickly and reaches a crossing point temperature in the later stage under dry-air *** on the analysis,it indicates the self-reaction of initial active groups exists in the self-heating of coal besides the reactions in the two parallel reactions *** combustion of coal is due to both the oxidation heat accumulation and the chain reaction.A new reaction model of self-heating of coal was proposed.

摘要：腐殖酸类物质是天然有机物的重要组成部分,它的分子结构中含有大量的活性基团,使得它在水溶液中呈现一定的物理化学性质,这些性质导致了腐殖酸对水体的危害:如增加了微污染物在水中的溶解度;与氯气生成多种卤化物和消毒副产物;抑制微囊藻毒素的降解;造成水体酸化。对于腐殖酸类物质的去除目前主要的方法有:膜滤法、活性炭吸附法、臭氧氧化、强化混凝法等。其中强化混凝技术被认为是最有效的处理方法。

摘要：介绍了弹塑共混耐老化改性沥青防水卷材的配方设计、工艺选择、基本性能和主要特点。工程应用表明,这种兼具优异高低温性能和耐老化性能的改性沥青防水卷材,能够在西藏等耐老化要求高的特殊地区推广。

摘要：阴离子交换膜(AEMs)是一类含有碱性活性基团,对阴离子具有选择透过性的高分子聚合物膜﹐也称为离子选择透过性膜.阴离子交换膜由3个部分构成:带有固定基团的聚合物主链即高分子基体(基膜)荷正电的活性基团(阳离子)以及活性基团上可以自由移动的阴离子.虽然AEMs给燃料电池、电解槽等领域带来革命性突破,但在AEMs中开发具有预先设计的规则拓扑和结构的高导电膜电解质仍然面临巨大的挑战.