Abstract：
:Using wood pulps with the average degree of polymerization 300-350 and urea as raw materials, cellulose carbamates were successfully synthesized by esterification reaction in N, N-dimethylacetamide(DMAc), an inexpensive, high boiling aprotic and polar solvent, for the purpose of improving the solubility of cellulose, reducing costs and environmental pollution. The products were dissolved in 9% sodium hydroxide solution at a low temperature after washing and drying and the cellulose carbamates solutions were obtained. The solutions were uniformly casted on a glass support after degassing. The regenerated cellulose membranes (CMs) were prepared by immersing the support in coagulation bath for some minutes. The structures of cellulose carbamates were characterized by Fourier transform infrared spectroscopy (FT-IR), 13C solid state nuclear magnetic resonance spectrometry (13C NMR), Thermal gravimetric analysis(TG), Scanning electron microscopy (SEM) and X-ray diffractometry(XRD). The filtration performances of CMs were tested. The results reveal that part groups of cellulose were substituted by amino in the medium, the cellulose carbamates were prepared with the reducing crystallinity and thermal decomposition temperature. The CMs have good separation performance for methylene blue.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Yu G,Teng Y,Lai W,Yin Cdoi
10.1016/j.ijbiomac.2016.09.081subject
Has Abstractpub_date
2016-12-01 00:00:00pages
1155-1160issue
Pt Aeissn
0141-8130issn
1879-0003pii
S0141-8130(16)30767-Xjournal_volume
93pub_type
杂志文章abstract：:The contribution of chitosan/nanocellulose (CS-NC) to the enzymatic activity of Candida rugosa lipase covalently bound on the surface of CS-NC (CRL/CS-NC) was investigated. Cellulosic material from oil palm frond leaves (OPFL) were bleached, alkaline treated and acid hydrolyzed to obtain the purified NC and used as na...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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更新日期：2018-07-15 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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journal_title：International journal of biological macromolecules
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journal_title：International journal of biological macromolecules
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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abstract：:In recent years, aging has been reported to be regulated by HAT. In this study, the inhibitory effects of spermidine on the matrix metalloproteinase-2 (MMP-2) activity and expression were investigated in human dermal fibroblasts (HDFs). It was observed that spermidine inhibits MMP-2 activity and expression. In additio...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2012.08.013
更新日期：2012-12-01 00:00:00
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journal_title：International journal of biological macromolecules
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更新日期：2019-07-15 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2015.12.069
更新日期：2016-04-01 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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更新日期：2020-12-15 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/0141-8130(89)90003-2
更新日期：1989-12-01 00:00:00
abstract：:Glycerol has emerged as a cheap waste material due to blooming biodiesel manufacturing units worldwide. The need is to exploit the crude glycerol (CG) to produce useful products such as polyhydroxyalkanoate (PHA). Bacillus thuringiensis EGU45 was found to produce 1.5-3.5 gP HA L(-1) from feed containing 1-10% CG (vv(-...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2015.03.046
更新日期：2015-01-01 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.04.209
更新日期：2019-07-15 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2005.08.009
更新日期：2005-10-30 00:00:00
abstract：:The process employed for the pulping and bleaching of sorghum straw was optimized prior to the synthesis of cellulose acetate. A 22 factorial central composite design was carried out. The variables considered were cooking time (1.5 to 2.5 h) and dilute alkali concentration (0.75 to 1.25%) for the pulping and bleaching...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.05.014
更新日期：2019-08-15 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章,评审
doi：10.1016/j.ijbiomac.2021.01.109
更新日期：2021-01-20 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/s0141-8130(99)00072-0
更新日期：1999-11-01 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.08.095
更新日期：2020-12-01 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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更新日期：2019-10-01 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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更新日期：2019-12-01 00:00:00
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journal_title：International journal of biological macromolecules
pub_type： 杂志文章
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更新日期：2010-11-01 00:00:00
abstract：:The physicochemical properties of 4-α-glucanotransferase (4αGTase)-modified rice flours were examined by measuring the molecular weight distribution, moisture sorption isotherm, and melting enthalpy of ice crystals. The results obtained by measuring the moisture sorption isotherm and melting enthalpy of ice crystals r...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2013.04.032
更新日期：2013-09-01 00:00:00
abstract：:Several models have been proposed for the quaternary structure of alpha-crystallin. Some suggest the subunits are arranged in concentric shells. Others propose that the subunits are in a micelle-like arrangement. However, none is able to satisfactorily account for all observations on the protein and the quaternary str...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/s0141-8130(98)00023-3
更新日期：1998-05-01 00:00:00
abstract：:Semi-essential arginine amino acid was selected to synthesis an organosilane linker for modifying chitosan biopolymer. The novel organosilane linker which was chemically synthesized by reaction of arginine with 3‑chloropropyl trimethoxy silane, covalently bonded to the chitosan amino group. The chemical structure of r...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.11.145
更新日期：2019-03-15 00:00:00
abstract：:Proteins secreted to mammalian cell supernatants are usually in a low concentration and purity, due to the limitation of the expression systems or the presence of a large amount of contaminant proteins from the cell medium. So, initial protein recovery from cell supernatants requires of a highly specific chromatograph...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2006.05.010
更新日期：2006-08-15 00:00:00
abstract：:Toward the development of biocomposites for packaging applications, the possibility of using kenaf cellulose (KC) was investigated in the production of low-density polyethylene (LDPE)/KC/polyethylene glycol (PEG) biocomposites. First, cellulose was extracted from the cell walls of kenaf-bast fibers. Then, different we...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2010.04.004
更新日期：2010-08-01 00:00:00
abstract：:The objective of this work is to research impacts of oxidized (OCS), acetylated (ACS) and cross-linked (CLCS) corn starch on gelatinization properties of rice flour and their gel structure during storage at 4 °C for 1 and 7 days. OCS led to significant increase of pasting temperature and solubility in blend flour but ...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.03.002
更新日期：2020-06-15 00:00:00
abstract：:1,4-α-Glucan branching enzyme (GBE, EC. 2.4.1.18), which plays a key role in the synthesis of starch and glycogen, has been overexpressed in E. coli as an intracellular enzyme by many researchers. In this study, it was found that the GBEs from Geobacillus thermoglucosidans and Rhodothermus obamensis were secreted into...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.04.002
更新日期：2019-07-01 00:00:00
abstract：:Exopolysaccharide (EPS) producing probiotic strain Enterococcus hirae KX577639 were isolated from the feces of South Indian Irula tribes. EPS yield was 18.57 g/L (dry weight) at 48 h in 2% sucrose supplemented MRS medium. TLC and GC-MS analysis confirmed the presence of predominant glucose monomer indicating the homop...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.07.015
更新日期：2018-10-15 00:00:00
