Abstract：
:Lignin is a high added-value product obtained from agrowastes through organosolv process to yield materials for technological applications. Here, coconut shell organosolv lignin was fractionated using green solvents (acetone and ethanol) and incorporated in poly(methyl methacrylate) (PMMA) films. The non-fractionated (WCSAL) and soluble fractions (ACT-F and EtOH-F) were completely characterized regarding their structures. The fractionation process altered lignins molecular weights, decreasing with the increased solvent polarity, although the higher polarity favored the dissolution of acylated and methoxylated fragments. PMMA films incorporated with lignin fractions were analyzed by TGA and DSC, which showed improved thermal and thermo-oxidative stabilities. DMA analyses of the films indicated that lignin soluble fractions had a plasticizer effect, while non-fractionated lignin increased PMMA films glass transition temperature (Tg). The antioxidant capacity of the films was also enhanced with the addition of lignins, in which those incorporated with soluble fractions showed the lowest IC50 values. The optical properties and photo-stability were also considerably improved, especially in the UVA and UVB regions. Therefore, solvent-fractionation represents a potential sustainable process to obtain lignins featuring different chemical structures, which can be applied effectively in the enhancement of PMMA films properties.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Avelino F,de Oliveira DR,Mazzetto SE,Lomonaco Ddoi
10.1016/j.ijbiomac.2018.12.043subject
Has Abstractpub_date
2019-03-15 00:00:00pages
171-180eissn
0141-8130issn
1879-0003pii
S0141-8130(18)33188-Xjournal_volume
125pub_type
杂志文章abstract：:Somatic cell nuclear transfer (SCNT) has potential applications in agriculture and biomedicine, but the efficiency of cloning is still low. In this study, the transcriptional profiles in cloned and fertilized embryos were measured and compared by RNA sequencing. The 2-cell embryos were detected to identify the earlies...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.02.026
更新日期：2020-05-01 00:00:00
abstract：:Ultraviolet radiation is a risk factor for cataractogenesis. It is believed that enhanced rates of lens opacification and cataract formation are the results of gradual loss of chaperone-like efficiency of α-crystallin upon exposure to UV light. To characterize chaperone-like activity of α-crystallin damaged by UV irra...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2014.10.060
更新日期：2015-02-01 00:00:00
abstract：:Bacillus licheniformis LMG 7559, which is capable of producing extracellular poly gamma- (glutamic acid) (PGA), was provided for the biopolymer synthesis. Using a modified PGA medium for PGA production, the isolated biopolymer, undergone dialysis process mainly for desalination and removal of other impurities. The bac...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.10.090
更新日期：2020-03-15 00:00:00
abstract：:This study investigated the extraction of polysaccharide from okra pulp (POP), its chemical components, and rheological properties. The results showed that the optimal extraction temperature, time, and the ration of water to material were 20-30 °C, 30 mins, and 150, respectively, giving a maximum yield of 29.4%. The P...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章,评审
doi：10.1016/j.ijbiomac.2020.01.163
更新日期：2020-04-01 00:00:00
abstract：:Bone is a highly integrative and dynamic tissue of the human body that is regularly modeled and remodeled by bone cells such as osteoblasts and osteoclasts. When a fraction of a bone is damaged or deformed, stem cells and bone cells under the influence of several signaling pathways regulate bone regeneration at the pa...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章,评审
doi：10.1016/j.ijbiomac.2020.08.053
更新日期：2020-12-01 00:00:00
abstract：:Rheological, thermal and microstructural properties of wheat bran sourdough (WBS) containing different levels of microbial exopolysaccharide (EPS) extracted from Lactobacillus plantarum were investigated. All sourdough samples showed pseudoplastic behavior and the highest apparent viscosity was achieved at 1.5% EPS. T...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.03.149
更新日期：2020-07-01 00:00:00
abstract：:Lacquer polysaccharide (LP) from the sap of the lac tree (Rhus vernicifera) was degraded by hydrochloric acid. The molecular weights (M(w)) of hydrolysis products of lacquer polysaccharide (LPD) decreased with the increase of the reaction temperature. Sulfated derivatives (LPDSs) of LPDs were prepared by the reaction ...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2009.11.010
更新日期：2010-03-01 00:00:00
abstract：:The objective of the present work is to study the physicochemical and functional properties of taro starch (Colocasia esculenta) and to further modify the starch by treating with citric acid to obtain a novel functional material. DSC, FTIR and SEM studies were performed along with physicochemical analysis. The disinte...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.06.086
更新日期：2018-10-15 00:00:00
abstract：:Pullulan is a thickener that can form semipermeable films, and glutathione is an effective reducing agent, while chitooligosaccharide has antibacterial activity. In this study, effect of pullulan-based coatings in combination with antibrowning and antibacterial agents (1% pullulan; 0.8% glutathione+1% chitooligosaccha...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2013.01.012
更新日期：2013-04-01 00:00:00
abstract：:Effective hemorrhage control is pivotal for decreasing the trauma death both in civilian and military but has proven to be dauntingly challenging, especially for solid viscera and artery trauma. Here we report the fabrication of a novel starch-based hemostat, sodium trimethaphosphate (STMP)-crosslinked starch/hyaluron...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.05.018
更新日期：2020-05-06 00:00:00
abstract：:Carboxymethyl-chitosan (CMC)/bentonite composite was prepared by the method of membrane-forming, and characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. The simultaneous adsorption of Cu2+ and Acid fuchsin (AF) applying CMC/bentonite composite as an adsorbent in sing...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2018.04.075
更新日期：2018-08-01 00:00:00
abstract：:Despite impressive progress of macromolecular encapsulation technique based on hyperbranched polymer (HP), the use of natural HP for guest encapsulation has rarely been reported. Herein, we present the simple synthesis of amphiphilic PGP-DC from natural peach gum polysaccharide (PGP) and demonstrate that the PGP-DC ca...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.03.151
更新日期：2020-07-01 00:00:00
abstract：:The aim of this work is to study the suitability of different soda cereal straw pulps (wheat, barley, corn and oats) to produce lignocellulose nanofibers (LCNF). For the study of the influence of the composition and physical characteristics, the pulps were characterized, observing that the physical characteristics do ...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2017.05.156
更新日期：2017-10-01 00:00:00
abstract：:An intracellular esterase (BCE) from Bacillus cereus WZZ006 was purified to homogeneity with an 89.5-fold purification, specific activity of 1.79 U/mg, and 26.7% recovery. The estimated molecular weight of BCE was 96 kDa which was analyzed by SDS-PAGE and MALDI-TOF-MS. Activity staining denotes that BCE has an unexplo...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.08.140
更新日期：2019-11-01 00:00:00
abstract：:We have investigated the protective effect of polysaccharides from Curcuma kwangsiensis (CKP) against oxidative injury in rats fed high-fat diet. The protective effect of CKP was compared with Lovastatin, a well-known antioxidant. Sixty SD rats were used for the experimental study. Oxidative injury was induced by feed...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2008.11.005
更新日期：2009-03-01 00:00:00
abstract：:Carboxymethyl potato starch (CMPS) was synthesized with a simple dry and multi-step method as a product of the reaction of native potato starch and monochloroacetic acid in the presence of sodium hydroxide. The influence of the molar ratio of sodium hydroxide to anhydroglucose unit, the volume of 95% (v/v) ethanol, th...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2012.07.003
更新日期：2012-11-01 00:00:00
abstract：:Curdlan is a polysaccharide that consists of β-1,3-linked glucose residues. A polysaccharide-producing bacterium isolated from soil samples was identified as Pseudomonas sp. QL212. The polysaccharide was purified to homogeneity via sequential ethanol precipitation, deproteinization, CM ion-exchange, and gel chromatogr...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2016.04.027
更新日期：2016-08-01 00:00:00
abstract：:Development of parenteral nanoformulations is highly challenging due to the stringent demands on stability, reproducibility and high drug loading with minimal excipients. This study focuses on the development of a pharmaceutically acceptable nanomatrix system for parenteral delivery based on Hydroxyethyl Starch (HES),...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2014.12.012
更新日期：2015-03-01 00:00:00
abstract：:Polymer microbeads (MBs) for scrubbing additives have generally been prepared from non-biodegradable synthetic polymers. The worldwide pollution of the marine ecosystem by microplastics urgently demands novel environment-friendly MBs. In this study, Ca-alginate MBs were fabricated by electrospraying an aqueous alginat...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2019.04.058
更新日期：2019-07-15 00:00:00
abstract：:Wound healing is a complex, dynamic and difficult process. Much effort and attempt has been made to accelerate this process. The purpose of this study is to prepare nanoparticles loaded with vaccarin (VAC-NPS)hydrogel and evaluate its effect on promoting wound healing. In the present study, the physicochemical propert...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.10.182
更新日期：2020-12-15 00:00:00
abstract：:Chitin and chitosan are amino polysaccharides having massive structural propensities to produce bioactive materials with innovative properties, functions and diverse applications particularly in biomedical field. The specific physico-chemical, mechanical, biological and degradation properties offer efficient way to bl...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章,评审
doi：10.1016/j.ijbiomac.2016.02.004
更新日期：2016-05-01 00:00:00
abstract：:The modification of gum Arabic with ferulic acid oxidation products was performed in aqueous medium, at 30 °C and pH 7.5, in the presence of Myceliophthora thermophila laccase as biocatalyst. First, this study aimed to investigate the structures of the oxidation products of ferulic acid that could possibly be covalent...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.12.113
更新日期：2021-02-01 00:00:00
abstract：:Annealing processes, involving specific heating protocols, have been used by man for centuries to impart desirable properties to materials - especially metals and particularly tools and weapons. The terminology has also been applied to biopolymers such as starches, where the effects of the processing have been known f...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章,评审
doi：10.1016/s0141-8130(99)00121-x
更新日期：2000-03-16 00:00:00
abstract：:Herein, porous sodium alginate/graphite based hybrid hydrogel was fabricated as an effective adsorbent for organic pollutant. Sodium alginate was modified through graft polymerization of acrylic acid and subsequently loaded with graphite powder to enhance its adsorption capability. The synthesized sodium alginate cros...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.01.142
更新日期：2020-04-01 00:00:00
abstract：:In this study, the cells-free and cells-loaded chitosan hydrochloride-alginate (CHC-Alg) microcapsules were firstly fabricated with polyelectrolyte complexes via an orifice-polymerization method. Scanning electron microscope images showed that the CHC-Alg microcapsules had a typical shell-core structure and the model ...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2016.09.034
更新日期：2016-12-01 00:00:00
abstract：:A fraction of low mobility group (LMG) nonhistone protein designated LMG(160) was isolated from rat liver chromatin by preparative gel electrophoresis and its interaction with DNA was studied using thermal denaturation and DNA-cellulose affinity chromatography techniques. The results showed that LMG(160) with an isoel...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/s0141-8130(02)00084-3
更新日期：2003-01-15 00:00:00
abstract：:The sugar compositions, α-glucosidase inhibitory and α-amylase inhibitory activities of polysaccharides from leaves and flowers of green tea (Camellia sinensis) obtained by hot water extraction (HWE), boiled water extraction (BWE) and enzymatic extraction (EE) were investigated. The yields, sugar contents and monosacc...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2010.07.007
更新日期：2010-11-01 00:00:00
abstract：:CD117/c-kit, a tyrosine kinase receptor, plays a critical role in hematopoiesis, pigmentation, and fertility. The overexpression and activation of c-kit are thought to promote tumor growth and have been reported in various cancers, including leukemia, glioblastoma and mastocytosis. To disrupt the SCF/c-kit signaling a...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.05.045
更新日期：2020-09-15 00:00:00
abstract：:In this work, 1,3,5-triazine-2,4,6-tribenzaldehyde was synthesized and chosen as the cross-linking agent for preparation of novel thermo- and pH-responsive hydrogels based on chitosan. The cross-linking proceeds through formation of imine bond by reaction of amino groups of chitosan with aldehyde groups of the cross-l...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2017.07.128
更新日期：2017-12-01 00:00:00
abstract：:The polysaccharide was first successfully isolated from the leaf of Dendrobium officinale by hot water extraction and alcohol precipitation and further purified using DEAE-52 and Sephadex G-100 chromatography. The structure of LDOP-1 was characterized by HPLC, GPC, and FT-IR and NMR spectroscopy, and its protective ef...
journal_title：International journal of biological macromolecules
pub_type： 杂志文章
doi：10.1016/j.ijbiomac.2020.01.026
更新日期：2020-04-15 00:00:00
