查询词典 hydrogen

The influences of the inclusion of Na~+ into each conformer (C7AB, C7"AB, C7eqB, C5A, C7axB orα"B) of AD molecule on the Ramachandran angles of molecular backbone and the hydrogen bonds in AD moiety were discussed in detail. It was found that in the forming process of bidentate structures of Na~+-AD ion-complexes, the original H-bonds in AD molecule were fully broken down, accompanying with the new formation of the two Na-O bonds.

论文中详细探讨了Na~+-AD络合离子六种构象的空间构型，分析了丙氨酸二肽与Na~+作用过程中AD分子骨架Ramachandran角及分子内N(1)–H(1)…O(2)、N(2)–H(2)…O(1)、N(1)–H(1)…N(2)和N(2)–H(2)…N(1)氢键的变化，研究发现Na~+与AD分子形成双齿结构时，AD骨架中原先的氢键全部被破坏，继而形成了两个新的Na-O键；Na~+与AD分子形成单齿络合离子时，AD骨架中原先的氢键或者得到增强或者断裂之后出现新的强度更大的氢键。

Hydrogen and oxygen are the constituents of water.

氢和氧是水的主要成分。

The atmosphere in areas in which hydrogen gas may be vented and might collect should be tested with a portable or continuous flammable gas analyzer.

用便携式或连续可燃气体分析仪来监测特定区域的空气，这些区域包括氢气排放口和氢容易积聚的地方。

Among the 10 descriptors, the coplanarity of three phenyl substituents with the imidazole ring, the hydrogen-bond acceptance, the molecular weight and logP are the most important factors for the modulation efficacy.

借助半经验分子轨道法AM1和从头计算法RHF/6-31G计算得到分子的多种描述因子，采用多元线性回归方法进行了结构药效分析，基于分子的结构参数、接受氢键的能力、脂水分配系数等对药物分子半有效剂量的影响提出一套拟合效果比较理想的构效关系方程，其复相关系数和标准偏差分别为0.897和0.323。

The invention discloses a preparing method of bacillus alcaligenes strain Alcaligenes sp., CCTCC No.M206121 of degraded o-nitrophenol, which comprises the following steps: allocating inorganic salt culture medium with dibasic sodium phosphate, monobasic potassium phosphate, manganese sulfate, copperas, addex-magnesium, calcii chloridum, blue copperas, white copperas and hydrogen dioxide solution; adjusting pH value; sterilizing under high temperature; enriching bacterial; sampling from sludge; allocating suspending liquid with soil sample and inorganic salt; seeding into ortho-nitrophenol fresh organic salt culture medium with finite volume seeding quantity; keeping the temperature; culturing on shaker; getting enriched culture; separating and purifying enriched culture in LB solid culture medium.

本发明公开了一种降解邻硝基酚的产碱杆菌菌株及制备方法，产碱杆菌为Alcaligenes sp。，CCTCC No.M206121。其制备步骤是：首先是配制无机盐培养基，成分为磷酸氢二钠、磷酸二氢钾、硫酸锰、硫酸亚铁、硫酸镁、氯化钙、硫酸铜、硫酸锌和双蒸水，调pH值高压灭菌；其次是菌种的富集，从污泥中取样，将土样与无机盐培养基配制成悬浮液，将悬浮液以一定体积接种量接种到含邻硝基酚的新鲜无机盐培养基中，恒温，摇床培养，获富集培养物；第三是将富集培养物在LB固体培养基中分离和纯化。

Catalytic co-pyrolysis of corncob/LDPE mixture was performed in nitrogen and hydrogen atmospheres

低密度聚乙烯与玉米芯混合物在氮气氛围中共同热解时，在2：8的混合

Now, as antiseptic and additive , hydrogen peroxide is used in our diet; because of the changes of diet and environment, the population of acidity corporeity has been increasing, it is harmful to our body; KCl is used in many ways, research about the relation of KCl and hypertension had been done, however, the results are not consistent.

目前，双氧水作为防腐剂、添加剂用于我们日常饮食中；由于饮食和环境因素的改变，酸性体质人群趋于增加，这对人体是有害的；KCl在很多方面也有应用，其与高血压的关系也有研究，但结果不大一致。

The above parameters and their corresponding crank angles show the higher inter-dependency with the increase of hydrogen fraction at lean mixture operation.

在化学计量比或浓燃时，掺混氢气可以维持平均指示压力的循环变动系数在较低的水平。

The results indicated that hydrogen bond and covalence bond were formed between PVA and TEOS through the sol-gel reaction.

结果表明PVA与无机相发生溶胶-凝胶反应生成氢键和共价键Si-O-Si，形成交联有机聚合物／无机杂化体系，使杂化膜的结晶度减少，控制了膜的溶胀，提高膜的溶解选择性能，但膜的溶胀减少会使通量有所下降。

This bonding may be hydrogen bonding but is preferably a salt bond and especially a covalent bond.

这可能是结合氢键，但最好是盐的债券，特别是共价键。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。