查询词典 H2O

A strain,which can use methylparathion,and its degradation substrate ρ-nitrophenol as source of carbon,was isolated from polluted water pool of Huayang Pesticide Plant.

从生产甲基对硫磷的华阳农药厂污水曝气池中，分离到1株能以甲基对硫磷及其降解中间产物对硝基苯酚为唯一碳源生长，且能够将其彻底降解为CO2和H2O的细菌L-W，经鉴定，为节杆菌属。

From polluted water of Huayang pesticide plant,isolated a L-W strain which can grow with methylparathion,ρ-nitrophenol which produced during degradation as the sole source of carbon,and turn them to carbon dioxide and water,it was identified as Arthrobacter sp.

从生产甲基对硫磷的华阳农药厂污水暴气池中，分离到1株能以甲基对硫磷及其降解中间产物对硝基苯酚为惟一碳源生长，且能够将其彻底降解为CO2和H2O的细菌L-W，经鉴定，为节杆菌属。

The intercalation reaction of nonaromatic heterocyclic compound hexahydropyridine into α-ZrP was reported for the first time.

磷酸氢锆α-Zr(HPO4)2.H2O是一类典型的层状结构的多功能材料，本文首次报道了非芳香杂环化合物六氢吡啶对α-ZrP的插层反应。

This sequence,which involves both photosystems,is termed noncyclic electron flow.

当被光激发时，一对电子被激活并离开光系统Ⅱ，由H2O所光解产生的电子所替代，2H2O→O2+4H++4e-。

The Suzuki reaction, the coupling of organoborate compounds with organic electrophiles catalyzed by Palladium complexes, is a valuable Csp2-Csp bond forming reaction. The reaction has been drawing increased attention in that the reaction permit the use of organoboron compounds that are thermally stable and inert to water and oxygen.In this section microwave promoted Suzuki reaction of phenylboronic acid with benzyl halides catalyzed by Pd(PPh3)2Cl2 DMF/H2O(v/v=10 : 2) was first reported.

第四章：微波辐射下Pd配合物催化端烯与芳卤偶联反应研究本章中我们在微波辐射条件下，研究了PdclZ(P Ph3)：催化端烯与芳卤的偶联反应，合成出了七种乙烯基化合物；并分别考察了微波辐射功率、辐射时间、原料配比、和PTc等因素对反应的影响，优选出了较佳的反应条件，并根据文献及实验结果，讨论了可能的反应机理。

The SiO2 gel was prepared through hydrolysis and condensation polymerization of tetraethyl orthosilicate and H2O. The gel and LaNi4.25Al0.75 powders were mixed completely and heated at 500 ℃ for 2 h to obtain samples.

摘 要：以正硅酸乙酯为原料，采用溶胶凝胶法制备多孔SiO2凝胶，将LaNi4.25Al0.75合金粉与凝胶混合在500℃进行真空烧结。

Metal/ oxide composite aerogels can be used as catalysts because of their high specific surface area. In this paper, Co-rich Co/SiO2 composite aerogels in which mass fraction of Co can reach 66%were firstly prepared by sol - gel process of Co-containing tetraethyl orthosilicate. The influence of H2O, catalyst, solvent and composition of Co-containing tetraethyl orthosilicate on the sol-gel process are discussed.

本工作首次采用含钴硅酸乙酯进行溶胶～凝胶反应来制备高钴含量的纳米级Co/SiO2复合气凝胶，制备的Co/SiO2复合气凝胶中n：n的比例最高可达2：1，且复合气凝胶中的Co含量可在小于66％的范围内任意调节，并系统研究了水量、催化剂浓度、溶剂量及含钴硅酸乙酯的组成对溶胶-凝胶过程的影响。

Compound 4 exhibits an unusual 2-D (4,6)-lattice-type network constructed by the [Co222]2- dimers and [Co(H2O)2]2+ units. As for Compound 5, four basic units link to each other form an approximately parallelogrammic pore, which constructed a 2-D covalent bond double-layers network.

化合物4展现出由[Co_2_2_2]~(2-)二聚体和[Co(H_2O)_2]~(2+)组成的具有4、6两种格子的不同寻常的二维网状结构，化合物5以类平行四边形孔道为基本单元构筑了二维共价键网络结构。

Al (OC3H7)3 was added to an excess of distilled water (Al : H2O = 1:60-100 ) under vigorous stirring. Nitric acid [HNO3] was then added to peptize the hydroxide precipitate (Al: HNO3 = 1: 0.16). The reaction vessel was then closed and maintained for 48h at 90° C to get clear boehmite sol.

水解和缩聚反应的最终产物为非晶态的一水氢氧化铝，由许多 AlOOH 相互聚合交联形成的胶核处于中心位置，其外层是紧密吸附的同种离子 Al2O22+，它们共同构成了胶粒。

The reaction was run in aqueous diethyl ether at 30℃ for 24h under the catalysis of bakers' yeast, which preincubated for 2h in the presence of phenacyl chloride.

实验结果表明，乙醚为适宜反应介质，适宜pH为中性；反应初始水含量和初始底物浓度分别以w(H2O)=30g/L、c=5 mmol/L为佳。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。