Different methods of precipitation of arabic acid from natural gum arabic are compared in terms of yield and molecular weight derived from gel chromatography experiments. All of the precipitation methods used gave products which were closely similar in terms of M n, but precipitation with HCl/...
For can aCllsio:Hbi:eTsieOe2n, the minimum energy system occurs when H and Cl form an HCl molecule inside from the distance between the Cl and H atom (1.28 Å) in Fig. 2c, which is equal to the the bulk. This molecular bond length of HCl (1.27 Å). Figure 3a...
Competent Cell Preparation Kit 品牌Code No.产品名称包装量价格(元)说明书数量 Takara9139Competent Cell Preparation Kit200 Rxns￥190 收藏产品 加入购物车 ■ 制品内容 (200 次量) Solution A20 ml Solution B20 ml ■ 制品说明 大肠杆菌经过处理后可以摄取外源DNA (Plasmid DNA、Phage DNA等),处于这种状态的细...
Nickel–iron composites are efficient in catalyzing oxygen evolution. Here, we develop a microorganism corrosion approach to construct nickel–iron hydroxides. The anaerobic sulfate-reducing bacteria, using sulfate as the electron acceptor, play a significant role in the formation of iron sulfide decorate...
(1) The preparation process of PDA-GO is as follows: Weigh a specific amount of Tris powder (Macklin Biochemical Co., Ltd)and dissolve it in triple-distilled water to prepare a 10 mM solution. Adjust the solution’s pH to 8.5 using dilute hydrochloric acid (HCl) (Aladdin Reagent Co...
Though multicolour labelling methods allow the routine detection of a wide range of fluorescent (immuno)probe types in molecular cytogenetics, combined applications for the simultaneous in situ detection of proteins and nucleic acids are still sporadic in plant cell biology. A major bottleneck has been...
All of the representative metals react directly with elemental halogens or with solutions of the hydrohalic acids (HF, HCl, HBr, and HI) to produce representative metal halides. Other laboratory preparations involve the addition of aqueous hydrohalic acids to com...
The precipitate was collect- ed by filtration, washed by HCl aq., NH3 aq., distilled water, and MeOH successively, and dried in vacuo. Yield: 0.33 g (1.00 mmol, 68%). Anal. Calcd for (C22H21NS 2H2O)n: C, 71.90%; H, 6.86%; N, 3.81%; S, 8.73%; Br, 0%. Found: C, ...
Into a flask equipped for efficient agitation and reflux was added 100 ml of 50% aqueous ethanol, 85 gm (1.5 mols) of iron filings, and a solution of 5.4 ml (0.06 mol) of concentrated HCl in 25 ml of ethanol. The flask was heated to reflux for 15 minutes while hydrogen was evolved...
Process for the preparation of organic isocyanate compounds A process for preparing organic isocyanate compounds characterized by reacting a chloromethyl group-containing compound having the formula: (X)RCHCl Y Tanaka,S Handa,A Nishibata,... - US 被引量: 5发表: 1977年 The Preparation and ...