a1.2 Mr. Enrico Ruffini or Fausto Ramozzi for Acetic Anhydride and Weak Acid Recovery production at a monthly rate of Euro 12,000 per person 1.2 先生。 恩里科Ruffini或Faustus Ramozzi为乙酸酐和微弱的酸补救生产在到月度就职欧洲12,000为人[translate] ...
The weight percentage gain (WPG) and the acetyl group content of wood due to acetylation with acetic anhydride have been analyzed by means of Fourier transform infrared spectroscopy (FTIR) and near-infrared spectroscopy (NIR). Band height ratios (BHR) (1240/1030 (1230/1030) and 1745/1030 (17...
Heating cellulose with acetic anhydride,acetic acid and a strong acid; quenching with a low molecular weight alcoholdoi:US5294703 AProvided is a novel improved process for the preparation of α-D-cellobiose octaacetate via the acetylative degradation of cellulose or cellulose acetate. The title ...
Then each chitosan sample was-acetylated with acetic anhydride under a homogeneous condition where chitosan was dissolved in a simple aqueous acetic acid. The degree of-acetylation was estimated byH NMR spectroscopy. As a result, the water-solubility of-acetylated chitosan with about 50% substitution...
N-methylisatoic anhydride (M25) is a useful precursor for preparing esters or amides of the small N-methylanthranilic acid fluorophore. The small size of this fluorophore should reduce the likelihood that the label will interfere wit...
In this study, as a continuation of our previous studies, chemical modification of low-molecular-weight polystyrenes (PSs) was carried out with various functional group modifiers: epichlorohydrin (ECH), maleic anhydride (MA) and acetic anhydride (AA), in a single stage using a cationic catalyst...
The invention discloses a preparation method of low-molecular-weight acetyl-terminated allyl alcohol polyether. The method comprises the steps of using low molecular weight allyl alcohol polyether and acetic anhydride as the raw materials, carrying out esterification, bubbling deacidification, hydrolysis ...
7•8 ZLys N-carboxy amino acid anhydride (NCA) was polymerized in most aprotic solvents to produce a polypeptide with the ex-conforma- tion. 5 These results indicate that copolypep- tides soluble in aprotic solvents can be pre- pared by copolymerization of two NCAs which produce co...
20 min in paraformaldehyde (4%), digested for 30 min at 37°C with proteinase K (10 µg/ml in 100 mM Tris–HCl containing 50 mM EDTA, pH 8.0), acetylated with acetic anhydride (0.25% in 0.1 M trietholamine, pH 8.0) and dehydrated through graded concentrations of ...
Polysaccharides can be modified or derivatized by etherification (e.g., via treatment with propylene oxide, ethylene oxide, 2,3-epoxypropyl trimethyl ammonium chloride), esterification (e.g., via reaction with acetic anhydride, octenyl succinic anhydride (‘OSA’)), acid hydrolysis, dextrinization,...