碳纳米管储氢前后的势场分布研究

研究碳纳米管储氢前后的势场分布及其变化,揭示GCMC方法模拟碳纳米管储氢所得氢气分子形成一定分布的内在原因和碳纳米管吸附储氢过程.     

锂键与氢键的比较

根据实验，对锂键的存在进行了论证，对锂键化合物进行了分类，比较了锂键和氢键的异同。     

异丙醇常压氧化制备过氧化氢反应研究

异丙醇常压氧化制备过氧化氢,操作方便、反应条件温和耳安全可靠.用空气作氧化剂成本低廉.开发出一条新的过氧化氢合成路线,副产重要化工产品丙酮,同时为异丙醇的开发利用找到了新的途径.     

Hydrogen agronomy: research progress and prospects

Journal of Zhejiang University-SCIENCE B - Agriculture is the foundation of social development. Under the pressure of population growth, natural disasters, environmental pollution, climate change,...     

Solvent effects on hydrogen bonding between primary alcohols and esters

INTRODUCTION Hydrogen bonds constitute a very interesting class of intermolecular interactions, which are of extreme importance in many fields of chemistry and molecular biology. Acrylic esters are industrially important chemicals and precursors in the synthesis of polymers (Schildknecht, 1977). Alcohols play an important role in many chemical reactions due to the ability to undergo self-association with manifold internal structures and are in wide use in industry and science as reagents,…     

植物体内活性氧代谢及功能研究进展

最近生物化学和遗传学研究证明活性氧不仅仅是需氧生物细胞的代谢副产物,而且还是细胞内重要的信号分子,其中过氧化氢在介导植物体对生物和非生物胁迫响应中起一种信号分子作用。作为信号分子的活性氧有其特定的合成途径、专一性的代谢响应机制、专一性的作用靶标和信号调节完成之后的代谢消除途径。过氧化氢介导的信号调节作用包括ABA控制的气孔关闭、生长激素控制的根的向地性生长中、氧剥夺抗性的产生等。过氧化氢的合成和作用与一氧化氮有关系。过氧化氢调节的下游信号事件包括细胞内钙流动、蛋白质磷酸化和基因表达。钙和小G蛋白信号通路对于细胞内部过氧化氢的稳定状态维持具有重要作用。     

自组装膜技术构筑双氧水的电化学酶传感器

利用自组装膜技术构筑H2O2的电化学生物传感器，以共价键合在电板表面的NB为媒介体，辣根过氧化物酶为生物敏感组分，具有灵敏度高、稳定性好、抗干扰能力强的特点。     

过氧化氢与硫酸亚铁反应热的测定

反应过程中所释放出的热量对我们的日常生活及其工农业生产有着重要的意义.而反应的热量问题在化工生产上有着举足轻重的作用,因此,研究与讨论反应热的测定很有必要.本文设计了采用锥形瓶简易装置测定过氧化氢与硫酸亚铁的反应热.结果表明:该实验方法测量反应热效果好,且操作便洁,易于观察反应过程中的实验现象.     

Multistage Extractive Reaction for Hydrogen Peroxide Production by Anthraquinone Process

The extractive reaction process of oxygen-working solution-water three-phase system for the production of hydrogen peroxide by the anthraquinone method was investigated in a sieve plate column of 50 mm in internal diameter. The oxidation reaction of anthrahydroquinone in the working solution with oxygen and the extraction of hydrogen peroxide from the working solution into aqueous phase occurred simultaneously in the countercurrent mode. The agitating effect caused by gaseous phase made the droplets of the dispersed phase become smaller, thus, increasing the liquid-liquid interfacial contact areas and resulting in the improvement of the mass transfer velocity. Results showed that the gas-agitation had a beneficial effect on the extraction of hydrogen peroxide from the working solution into the aqueous phase： the concentration of hydrogen peroxide in the raffinate decreased with the increase of the gaseous superficial velocities： and the concentration of H2O2 in the raffinate increased with the increase of the dispersed phase superficial velocity at the same superficial velocity of the gaseous phase. In the G-L-L extractive reaction process, with the increase of the gaseous superficial velocities, both the conversion of the anthrahydroquinone oxidation and the extraction efficiency of hydrogen peroxide first increased significantly, then increased gradually.     

灯盏花素治疗冠心病的疗效观察

目的：探讨灯盏花素治疗冠心病的疗效机理．方法：用灯盏花素治疗冠心病伴高粘滞血症患者４０例，与用复方丹参注射液治疗的同样患者４０例进行对比，两组疗程均１５天．对血清脂质过氧化物（ＬＰＤ）含量、超氧化物歧化酶活性（ＳＯＤ）、血脂、血液流变学指标进行检测．结果：患者症状、心电图、血脂、血流变、ＬＰＯ、ＳＯＤ，治疗组较对照组改善明显．（ｐ＜０．０５）．结论：灯盏花素降低冠心病者血液的高粘滞状态，提高抗氧化能力，有效改善其症状．