Abstract：
:Development of efficient, inexpensive and recyclable catalysts for a reaction under mild and green reaction conditions is still a very marvelous topic. In this work, diphenyl diselenide stabilized on magnetic chitosan as a novel, highly efficient, ecologically safe, cost-effective and magnetically recoverable heterogeneous nano-biocatalyst was prepared and characterized by different techniques, such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometer (VSM). Then, the catalytic activity of resultant nano-biocatalyst was effectively appraised for the chemoselective oxidation of sulfides to sulfoxides using H2O2 as a green oxidant at ambient temperature with a good to high yields without use any organic solvents. Additionally, the easily preparation from cheap and commercially available reagent, carrying out the reactions in the eco-friendly and mild conditions, short reaction times, easy separation from reaction mixture, recoverability and reusability of catalyst for four consecutive cycles without a significant degradation in catalytic activity, are some prominent advantages of this novel catalyst. These advantages make it a potential candidate to address the industrial needs and economic and environmental concerns.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Rangraz Y,Nemati F,Elhampour Adoi
10.1016/j.ijbiomac.2018.05.207subject
Has Abstractpub_date
2018-10-01 00:00:00pages
820-830eissn
0141-8130issn
1879-0003pii
S0141-8130(18)30839-0journal_volume
117pub_type
杂志文章abstract：:The aim of this study was to investigate the role of process conditions and system composition on the acid-induced gelation of a mixture of milk protein and gum tragacanth. This was studied by determining the effects of co-solute (lactose) addition (3, 5 and 7%) and gelation temperature (25, 37 and 45°C) on the mixtur...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2012.02.026
更新日期：2012-05-01 00:00:00
abstract：:The isolation process of alkali lignin (AL) from the valonea of Quercus variabilis Blume was optimized (liquid/solid ratio, 12.21; isolation time, 4.21h; isolation temperature, 42.21°C; and alkali concentration, 0.85mol/L) using the response surface method (RSM), with the highest isolation rate obtained being 22.67%. ...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2017.01.008
更新日期：2017-04-01 00:00:00
abstract：:β-Glucosidases (BGL) are key members of the cellulase enzyme complex that determine efficiency of lignocellulosic biomass degradation, which have shown great functional importance to many biotechnological systems. A previous reported BGL from Neosartorya fischeri (NfBGL) showed much higher activity than other BGLs. Sc...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.02.117
更新日期：2020-05-15 00:00:00
abstract：:Nanotechnology-based drug delivery systems have been used to enhance bioavailability and biological activities. Chitosan incorporating curcumin can serve as a biocompatible substitute for metallic nanoparticles in preventing biofilm formation of Streptococcus mutans and plaque on teeth. The interactions between chitos...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.03.100
更新日期：2018-07-15 00:00:00
abstract：:Beta-lactoglobulin has been found to be a member of a super family of protein that bind specific ligands and which share common features in their amino acid sequences. Here we show that these features are grouped spatially on the surface of the proteins and suggest that they may be concerned with binding to cell-surfa...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/0141-8130(89)90041-x
更新日期：1989-02-01 00:00:00
abstract：:Aspergillus oryzae S2 was assayed for alpha-amylase production under solid state fermentation (SSF). In addition to AmyA and AmyB already produced in monitored submerged culture, the strain was noted to produce new AmyB oligomeric forms, in particular a dominant tetrameric form named AmyC. The latter was purified to h...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2015.01.026
更新日期：2015-04-01 00:00:00
abstract：:Transglycosylation (TG) by Enterobacter cloacae subsp. cloacae chitinase 2 (EcChi2) has been deciphered by site-directed mutagenesis. EcChi2 originally displayed feeble TG with chitin oligomer with a degree of polymerization (DP4), for a short duration. Based on the 3D modelling and molecular docking analyses, we alte...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.10.125
更新日期：2020-12-15 00:00:00
abstract：:Sour orange peel, a by-product of the fruit juice industry, was used as a source of pectin. The effects of temperature (75-95°C), time (30-90 min), and liquid-solid ratio (20-40, v/w) were investigated on yield, methoxylation degree (DE), and galacturonic acid content using a Box-Behnken design and response surface me...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2015.11.007
更新日期：2016-01-01 00:00:00
abstract：:Biodegradable poly-3-hydroxybutyrate [P(3HB)] and natural fillers - clay, peat, and birch wood flour - were used to prepare powdered composites to form pellets and granules. Pellets were produced by cold pressing of polymer and filler powder whereas granules were produced from the powders wetted with ethanol. Characte...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.11.112
更新日期：2020-07-15 00:00:00
abstract：:The aim of the present study was the development of a novel gellan gum derivative exhibiting mucoadhesive properties for nasal application. Accomplishing this, amino groups have been introduced to the polymeric backbone. The resulting synthesis products were characterized in terms of the amount of attached amino group...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.04.114
更新日期：2020-05-04 00:00:00
abstract：:In this study, gellan polymer was conferred amphiphilic character by conjugating alkyl carbon chain (C16) to its backbone via etherification reaction. The amphiphilic copolymer self-assembled into water and formed spherical micellar structures with a mean diameter of 832 nm. Copolymer micellization caused a considerab...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2014.09.064
更新日期：2015-01-01 00:00:00
abstract：:We have already found that an amidinated chitin, which was prepared by the reaction of a partially deacetylated chitin with N,N-dimethylacetamide dimethyl acetal, was converted into an amidinium chitin bicarbonate with nanofiber morphology by CO2 gas bubbling and ultrasonic treatments in water. In this study, we perfo...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2016.06.019
更新日期：2016-10-01 00:00:00
abstract：:Biocompatible soy protein isolate/silk fibroin (SPI/SF) nanofibrous scaffolds were successfully fabricated through electrospinning a novel protein blend SPI/SF. Prepared nanofibers were treated with ethanol vapor to obtain an improved water-stable structure. Fabricated scaffolds were characterized through scanning ele...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.05.090
更新日期：2020-10-01 00:00:00
abstract：:Solid keratin-rich waste management is one of essential research area in nowadays. Conventional chemical and high thermal keratin waste decomposition methods are fully explored and not enough effective for future biotechnology perspectives. However, traditional keratin-rich waste decomposition methods could be replace...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.03.046
更新日期：2018-07-01 00:00:00
abstract：:Lycium barbarum polysaccharide-doxorubicin (LBP-DOX) nanoparticles were synthesized via a one-step Schiff base reaction between oxidized Lycium barbarum polysaccharide (oxidized LBP) and doxorubicin (DOX). The structure of LBP-DOX nanoparticles was characterized by multi-spectral methods, 1H nuclear magnetic resonance...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.10.103
更新日期：2019-01-01 00:00:00
abstract：:Silk is spun from the liquid precursor known as liquid silk secreted from the posterior part and stored in the silk gland lumen with occurrence of many momentary events. The liquid silk in the silk gland is transformed to the spun silk fibre. In this study the elucidation of the protein components of liquid silk from ...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.08.232
更新日期：2020-11-15 00:00:00
abstract：:Fish are reported to exhibit chitinase activity in the stomach. Analyses of fish stomach chitinases have shown that these enzymes have the physiological function of degrading chitinous substances ingested as diets. Osteichthyes, a group that includes most of the fishes, have several chitinases in their stomachs. From ...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章,评审
doi：10.1016/j.ijbiomac.2017.03.118
更新日期：2017-11-01 00:00:00
abstract：:Cu(II) 12-MCCu(II)PyrAcHA-4 metallacrown was studied by several spectroscopic techniques as an interacting ligand with G-quadruplex DNA structures. Investigations were performed on oligonucleotides bearing human telomeric and protooncogenic c-myc sequences in buffered solution mimicking ionic conditions in cellular en...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.11.163
更新日期：2020-08-01 00:00:00
abstract：:During carcinogenesis, changes in the glycosylation can modulate many biological processes. Thus, the interest in exploring and understanding the roles of carbohydrates as cancer biomarkers has been increasing. Lectins have been applied as useful tools in glycobiology, especially when associated with fluorescent repor...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.07.088
更新日期：2019-10-01 00:00:00
abstract：:Hepatocellular carcinoma (HCC) is considered as one of the most aggressive cancer worldwide. In Egypt, the prevalence of HCC is increasing during last years. Recently, drug-loaded microparticles were used to improve the efficiency of various medical treatments. This study is designed to evaluate the anticancer potenti...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2014.05.031
更新日期：2014-08-01 00:00:00
abstract：:Skin and soft tissue infections are major concerns with respect to wound repair. Recently, anti-bacterial wound dressings have been emerging as promising candidates to reduce infection, thus accelerating the wound healing process. This paper presents our work to develop and characterize poly(vinyl alcohol) (PVA)/chito...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.01.139
更新日期：2020-04-15 00:00:00
abstract：:Chitin-glucan complex (CGC) was used for the first time for the preparation of hydrogels. Alkali solvent systems, NaOH and KOH solutions, either at 1 or 5 mol/L, were used for CGC dissolution using a freeze-thaw procedure (freezing at -20 °C and thawing at room temperature; four cycles). The CGC solutions thus obtaine...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.11.141
更新日期：2020-08-01 00:00:00
abstract：:In the present work, we have studied the structure and thermal stability of bovine serum albumin (BSA)-locust bean gum (LBG) mixture. It was found from the spectral results that the presence of LBG resulted in slightly decreasing the α-helical content and the partly unfolding of the skeleton of BSA. LBG binds to the n...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2017.12.139
更新日期：2018-05-01 00:00:00
abstract：:Two purified polysaccharides named WPMP-1 and WPMP-2 were obtained from Polygonum multiflorum with an average molecular weight of 2.04kDa and 92.13kDa, respectively. Structural characterization revealed that WPMP-1was supposed to be a glucan composed of 1,4-linked α-d-Glcp, 1,4,6-linked α-d-Glcp, and terminal α-d-Glcp...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.02.064
更新日期：2018-07-01 00:00:00
abstract：:Carrageenans play an important role in many medical and food technology applications. However, the study of their properties has been hampered by a lack of well-defined samples (fractions). In this paper, a new principle is presented by which well-defined fractions can be obtained. It is based on batch adsorption to D...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/0141-8130(94)90017-5
更新日期：1994-04-01 00:00:00
abstract：:The role of polyglutamine (polyQ) tract on protein stability and disease pathology remains ambiguous. We monitored the unfolding/refolding patterns of huntingtin proteins with varying polyQ lengths. In the presence of urea, minor differences in unfolding and refolding efficiencies were observed. However, in the presen...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2012.07.022
更新日期：2012-12-01 00:00:00
abstract：:Lyophilized wafers comprising sodium alginate (SA) and gelatin (GE) (0/100, 75/25, 50/50, 25/75, 0/100 SA/GE, respectively) with silver sulfadiazine (SSD, 0.1% w/w) have been developed for potential application on infected chronic wounds. Polymer-drug interactions and physical form were characterized by Fourier transf...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2015.04.048
更新日期：2015-08-01 00:00:00
abstract：:Recombinant hybrid Manganese superoxide dismutase from Staphyloccus saphropyticus/S. equorum (rMnSODSeq) exhibits stability at high temperatures. The enzyme occurs as a dimer that dissociates around 52°C prior to unfolding of the monomer around 64°C, demonstrating contribution of the dimeric form to stability. Here, s...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2017.01.096
更新日期：2017-05-01 00:00:00
abstract：:Donepezil (DPZ) is a well-known drug for Alzheimer's disease that inhibits acetylcholinesterase activity (AChE). In the present study, the inhibitory effect of DPZ on non-enzymatic glycated-AChE (GLY-AChE) was studied by different experimental and simulation techniques. The initial investigation revealed that glycatio...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.05.177
更新日期：2020-10-01 00:00:00
abstract：:A water-soluble heteroglycan (PS-I) isolated from the aqueous extract of a wild edible mushroom Lentinus sajor-caju showed average molecular weight ∼1.79×105Da. The structure of the polysaccharide was determined using chemical and 1D/2D NMR experiments. Acid hydrolysis indicated the presence of d-glucose, d-galactose,...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2017.08.163
更新日期：2018-02-01 00:00:00
