Oligocellulose from acid hydrolysis: A revisit
نویسندگان
چکیده
The classical method of producing cellulose oligomers through hydrolysis microcrystalline (MCC) in phosphoric acid has been re-examined. Hydrolysis products are fractionated by precipitation to yield two types with different average degrees polymerization (DP). number- and weight-averaged molecular weights the lower DP fraction 1339 g/mol 1388 respectively, corresponding a polydispersity index 1.04. oligomer forms type-II crystal, can be dissolved both alkaline aqueous solutions dimethyl sulfoxide. X-ray neutron small angle scattering solution described as rigid slabs.
منابع مشابه
Acid Hydrolysis of Pretreated Palm Oil Lignocellulosic Wastes
Palm oil solid wastes consist of cellulose, hemicellulose and lignin. In this study, a single stage of acid hydrolysis process of palm oil empty fruit bunch (EFB) for production of fermentable sugar was carried out under moderate temperature (45°C) and ambient pressure. The effect of four different process variables such as solid size, HCl concentration, solid percentage and temperature were in...
متن کاملHydrolysis of Sorghum (Broomcorn) in Diluted Hydrochloric Acid
Effective conversion of lignocellulosic material as renewable energy source has significant reflection on economic and environmental impact. Diluted acid hydrolysis at optimal condition was used to liberate fermentable sugar. The sorghum stalks, the alkali pretreatment of biomass and hydrolysis in diluted hydrochloric acid were investigated. The hydrolysis reaction was carried out in a 5L react...
متن کاملBioethanol production from Jerusalem artichoke by acid hydrolysis
The hydrolysis of inulin from Jerusalem artichoke (JA) slices by HCl under different regimes of temperature and hold (contact time) time was investigated. Final reducing sugars concentration in the hydrolyzates depended on temperature, pH, hydromodule (JA:water) and hold time. Acid hydrolysis at higher temperature and longer hold time increased the degradation of fructan to fructose and increas...
متن کاملBiosynthesis and Hydrolysis of Poly ( 7 - glutamic acid ) from BaciUizs
Poly(7-glutamic a id) (PGA) production ill Bacillas suhtitis IF03335 was studied. When citric acid as a carbon source was added to a glutamic acid medium containing L-glutamic acid and ammonium sulfate, a large amount of pure PGA wEs produced. On the other hand, when glucose was added to the glutamic acid medium, a by-preduct was produced, which seemed to be a polysaccharide. Moreoyer, the mode...
متن کاملDilute Acid Hydrolysis of Papain
Studies on the amino acid sequence of papain by means of the that hydrolysis of endopeptide linkages in dilute acid might peptides from the chymotryptic (l-3) and tryptic digests (4, 5) proceed predominantly by a mechanism, independent of hydrogen of the protein have yielded a considerable number of partial ions, involving un-ionized P-carboxyl groups of aspartyl residue. sequences. Four of the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Surface Science
سال: 2021
ISSN: ['1873-5584', '0169-4332']
DOI: https://doi.org/10.1016/j.apsusc.2020.147783