Ring opening of extremely hydrophobic epoxides with water, amines, sodium azide and thiophenol was realized in the mixture solvent of water and 1, 4-dioxane under reflux condition. Hot water was believed to act as a mild Brønsted acid catalyst in the epoxide-opening reactions. ...
Water undergoes autoionization to a small extent; the ionization constant at 25°C is 1.008x10–14: 2H2O(l) ↔ H3O+(aq) + OH¯ Water reacts both as an acid and a base. With bases it reacts as an acid: NH3(aq) + H2O(l) ↔ NH4+(aq) + OH¯; and with acids it react...
As organic acids , benzoic acid derivatives are common organic pollutants in natural water body. 苯甲酸类化合物是自然水体中的常见有机污染物,属于有机酸. 来自互联网 11. In Yan River watershed, oil runoff pollution is an important pollution form of surface water body. 延河流域石油类污染物的暴雨...
As an indispensable method, the Gibbs plot is widely used to qualitatively analyze the hydrogeochemical processes in a certain area (Gibbs RJ, 1970). The water chemistry data of groundwater and pore-water samples were respectively placed on the Gibbs plot according to depth and runoff, as show...
药典对照品 积分兑换 加入收藏夹 英文名称 : - 产品编号 : BW3210 标准值 : - 规格: 2mL CSA号 : - 标准价格: ￥50.00 优惠价格: ￥0 选择规格: 2mL 选择规格: 品牌: - 基本信息 质检信息 材料安全信息 As:0.233μmol/g, U=2.0% 最近浏览...
The latex contains, as emulsifier (I), the salt of an organic acid having a lower ionisation const. than that of the acid of the anhydride. The mixture is allowed to stand still for a period which is long enough to hydrolyse the acid anhydride and cause polymer particle agglomeration, and...
美 英 un.无离子水 网络去离子水;脱离子水;软化水 英汉 网络释义 un. 1. 无离子水 例句 更多例句筛选
Yngard RA, Sharma VK, Philips J, Zboril R (2008) Ferrate(VI) oxidation of weak acid dissociable cyanides. Environ Sci Technol 42:3005–3010. doi:10.1021/es0720816 Article CAS Google Scholar Yoon S, Lee K, Oh S, Yang J (2008) Photochemical oxidation of As (III) by vacuum-UV lamp...
(2.1 × 10−5), indicating that O2-H2O atmosphere accelerates the redispersion process. Subsequently, quasi in-situ XAS experiments were conducted to identify the chemical state of Cu in O2, Ar-H2O and O2-H2O atmospheres. As shown in Fig.2band Fig. S3, the main peak centered at ...
Qualitative analysis was performed with an ECLIPSE PLUS C18 (Agilent, 100 × 2.1 mm, 1.8 µm) at 40 °C on a UHPLC- Q Exactive Orbitrap MS (Thermo Electron, Bremen, Germany). The mobile phases consisted of the A phase (0.1% formic acid) and B phase (acetonitrile) and were ru...