Abstract:
:A novel superoleophilic-hydrophobic nonanyl chitosan-poly (butyl acrylate) grafted copolymer was fabricated as a low-cost oil-adsorbent. Chitosan (CS) was coupled with a hydrophobic nonanal (N) to form nonanyl chitosan (NCS) schiff base, and followed by grafting with butyl acrylate monomers (ButA). The grafted copolymer was characterized by FTIR, TGA and SEM tools. The grafting percent was augmented and reached 88.5% with increasing ButA concentration up to 156 mM. Moreover, measurements of contact angle proved the superoleophilic character of NCS-g-poly (ButA) copolymer with an oil-contact angle 31°. Factors affecting the removal process such as contact time, oil type, oil dose, adsorbent dose, temperature and agitation speed were optimized. An increment in the oil removal (%) was observed with increasing the oil viscosity in the order of gasoil < mobil-1 oil < light crude oil < heavy crude oil. Besides, the adsorption process followed the pseudo-second order model and the equilibrium data were sufficiently fitted with the Langmuir model with a maximum adsorption capacity 108.79 g/g at 25 °C. Thermodynamic parameters computed from Van't Hoff plot confirmed the process to be exothermic, favorable and spontaneous. The results nominate the superoleophilic adsorbent as a potential oil- adsorbent for petroleum oil spills removal.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Omer AM,Khalifa RE,Tamer TM,Elnouby M,Hamed AM,Ammar YA,Ali AA,Gouda M,Eldin MSMdoi
10.1016/j.ijbiomac.2019.08.169subject
Has Abstractpub_date
2019-11-01 00:00:00pages
588-599eissn
0141-8130issn
1879-0003pii
S0141-8130(19)32939-3journal_volume
140pub_type
杂志文章abstract::A novel nucleoside 2'-deoxyribosyltransferase (LhNDT) from Lactobacillus hilgardii ZJS01 was cloned and expressed in Escherichia coli BL21 (DE3). The amino acid sequence of LhNDT displayed the highest identity of 26% to other reported NDTs. LhNDT was a monomer as revealed by gel filtration chromatography with or witho...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2017.08.104
更新日期:2018-01-01 00:00:00
abstract::ZnO nanoparticles (NPs) synthesized using haemocyanin (Hc-ZnONPs) purified from haemolymph of Penaeus semisulcatus were characterized using various techniques. HR-TEM and SEM microscopy indicated Hc-ZnONPs had a typical size of 20-50 nm and were spherical. The objective of current investigation was to assess the effec...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.07.216
更新日期:2019-10-15 00:00:00
abstract::Anchote (Coccinia abyssinica) starch films were prepared by a solution casting method with glycerol, 1-ethyl-3-methylimidazolium acetate, sorbitol or triethylene glycol as plasticizers. The effect of these plasticizers and their concentration on film microstructure, thermal, and mechanical properties was investigated....
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.03.218
更新日期:2020-07-15 00:00:00
abstract::Different amounts of quercetin were mixed with carboxymethyl chitosan (CMCS) to develop novel antioxidant active packaging and intelligent Al3+-sensing films. The physical properties, structure, antioxidant and Al3+-sensing abilities of CMCS-quercetin composite films were investigated. Results showed CMCS-quercetin co...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.12.264
更新日期:2019-04-01 00:00:00
abstract::A sulfated Chinese yam polysaccharide (S-CYP) was obtained from non-starch Chinese yam polysaccharide (CYP) by chlorosulfonic acid-pyridine (CSA-Pyr) method. The physicochemical characteristics and immunological activity of S-CYP were evaluated in this study. Results showed that sulfated modification changed the physi...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.09.213
更新日期:2020-12-15 00:00:00
abstract::Alginic acid is a natural polysaccharide, which has been widely concerned and applied due to its excellent water solubility, film formation, biodegradability and biocompatibility. This paper briefly describes the source, properties, structure and application of sodium alginate by summarizing and analyzing the current ...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章,评审
doi:10.1016/j.ijbiomac.2020.06.180
更新日期:2020-11-01 00:00:00
abstract::As iron supplement, the antioxidant activities of APS-iron (III) complex were comprehensively evaluated by 5-axe cobweb charts, which indicated the APS-iron (III) complex had a certain antioxidant activity and been weaker than that of APS. The results of immunological activity experiments indicated the stimulation ind...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.03.196
更新日期:2019-07-01 00:00:00
abstract::N-acetylglucosaminidase produced from Lecanicillium lecanii on submerged culture displayed hydrolytic and transglycosylation activities. The highest specific activity for the enzyme was 1.87 U/mg after 120 h of culture. The chromatographic purification for a single protein fraction showed a molecular weight of 50.4 kD...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.12.237
更新日期:2020-02-15 00:00:00
abstract::The aim of this study was to develop a novel approach allowing simultaneous enrichment as well as specific and fast detection of Escherichia coli O157:H7 by indirect ELISA using optimized support membrane based on chitosan (CHI), cellulose nanocrystals (CNCs), and glycerol (GLY). Therefore, combining the step of the c...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.09.225
更新日期:2020-03-01 00:00:00
abstract::A novel composite hydrogel was prepared as a dual drug delivery carrier. Poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) microparticles were prepared to encapsulate simultaneously ketoprofen and mupirocin, as hydrophobic drug models. These microparticles were embedded in a physically crosslinked hydrogel of κ-carragee...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.12.193
更新日期:2020-03-01 00:00:00
abstract::Pseudomonas chlororaphis subsp. aurantiaca (DSM 19603) was grown on crude glycerol from biodiesel production to produce a medium-chain-length polyhydroxyalkanoate (mcl-PHA), composed of 3-hydroxydodecanoate (43 ± 1.8 mol%), 3-hydroxydecanoate (29 ± 3.1 mol%), 3-hydroxytetradecanoate (12 ± 0.4 mol%), 3-hydroxyoctanoate...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.09.064
更新日期:2019-02-01 00:00:00
abstract::As a new generation of green solvent, the utilization of natural deep eutectic solvents (NADESs) in enzymatic reactions has attracted widespread academic and industrial interests. Especially, choline chloride-glycerol (C-Gly) has been extensively used in many green chemistry processes. In this study, a series of C-Gly...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.06.150
更新日期:2019-09-01 00:00:00
abstract::Salt hydrate phase change materials (PCMs) possess the challenge of supercooling, which must be addressed to allow more efficient energy storage and utilisation. In this work, cellulose nanofibril (CNF), a versatile biopolymer was used to support and disperse silver nanoparticles (AgNPs), and the synthesised CNF/AgNPs...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2021.01.183
更新日期:2021-01-30 00:00:00
abstract::This study aimed to understand the effect of silver nanoparticles (AgNPs) on physiochemical properties of hydroxypropyl methylcellulose (HPMC) film-forming solutions (FFS) and nanocomposite films (NCF), as well as the efficacy of these materials to control the development of anthracnose caused by Colletotrichum gloeos...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.07.130
更新日期:2020-12-01 00:00:00
abstract::In this present study, a gene (ent-B) encoding the bacteriocin enterocin-B was cloned, overexpressed and purified from Enterococcus faecium por1. The molecular weight of the bacteriocin enterocin-B was observed around 7.2 kDa and exhibited antimicrobial activity against several human pathogenic bacteria. The antimicro...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.05.002
更新日期:2018-09-01 00:00:00
abstract::Sesbania gum (SG) was successfully modified by combining cross-linking with hydroxypropylation in solvent of ethanol. The hydroxypropylation technology parameters were optimized by the orthogonal test. The results indicated that both cross-linking and hydroxypropylation could improve the freeze-thaw stability, acid an...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.10.188
更新日期:2020-06-01 00:00:00
abstract::The influence of metal cations on G-quadruplex structure and peroxidase-mimicking DNAzyme activity was investigated. Experiments revealed a significant role of magnesium ion, which in the presence of potassium cation influenced DNAzyme activity. This ability has been associated with alteration of G-quadruplex topology...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2016.01.020
更新日期:2016-04-01 00:00:00
abstract::Concanavalin A (Con A) binding fraction of human seminal plasma is vital as it shows decapacitating activity and contains proteins which have critical roles in fertility related processes. Con A binding proteins were isolated by lectin affinity chromatography. These proteins form high molecular weight aggregates at ne...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2012.11.019
更新日期:2013-02-01 00:00:00
abstract::We report here the self-assembled structures of polyelectrolyte complexes (PECs) of polyanionic sodium alginate with the polycationic chitosan at room temperature. The PECs prepared at different pH values exhibited two distinct morphologies. The chitosan-alginate PECs self-assembled into the fibrous structure in a low...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.03.075
更新日期:2018-07-15 00:00:00
abstract::Chara is a genus of freshwater alga that is evolutionarily observed at the aquatic-terrestrial boundary, whose cellulose microfibrils are similar to those of terrestrial plants regarding the crystallinity and biosynthesis of cellulose. Oven-dried and never-dried celluloses samples were prepared from chara. Terrestrial...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2017.12.051
更新日期:2018-04-01 00:00:00
abstract::Guava seed polysaccharide fraction 3 (GSF3) is an immunomodulatory polysaccharide from guava (Psidium guajava L.) seed polysaccharides. However, effects of GSF3 on the growth of breast cancer cells were not understood, yet. To clarify the GSF3 effects on breast cancer cell growth, GSF3 was subjected to treat MCF-7 cel...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.06.057
更新日期:2020-10-15 00:00:00
abstract::The sequence distributions of two microbial copolyesters obtained by fermentation of Rhodospirillum rubrum, grown with 3-hydroxyhexanoic or 3-hydroxyheptanoic acids, were determined by analyzing the oligomers prepared by partial pyrolysis or partial methanolysis of these copolyesters using fast atom bombardment mass s...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/s0141-8130(99)00085-9
更新日期:1999-11-01 00:00:00
abstract::Hydroxypropylation and cross-linking were carried out on three rice starches with 6.93%, 19.02% and 48.41% AAC respectively. AAC affected the efficiency of modification, with AAC increased, the molar substitution of hydroxypropylated starch decreased while degree of substitution of cross-linked starch increased. Modif...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.01.194
更新日期:2019-05-01 00:00:00
abstract::Three phase partitioning is a process in which mixing t-butanol with ammonium sulphate with a protein solution leads to the formation of three phases. Generally, the interfacial protein precipitate (formed between upper t-butanol rich and lower aqueous phase) can be easily dissolved back in aqueous buffers. In case of...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2013.06.008
更新日期:2013-09-01 00:00:00
abstract::The present investigation reports an in-vitro study using combination of laccase and an enhancer capable of inhibiting the growth of pathogenic microorganisms, preventing biofilm formation, and whitening teeth. Laccase-cinnamic acid system remarkably inhibited the growth of Aggregatibacter actinomycetemcomitans, Candi...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2021.01.068
更新日期:2021-01-15 00:00:00
abstract::A novel Hsp70 chaperone from Rutilus frisii kutum was identified, cloned, expressed, purified and its functional characteristics revealed. The 3D structure of Hsp70 from Rutilus kutum was constructed using the crystal structure of E. coli Hsp70 as the template, with 47% sequence identity. The in vitro ATPase activity ...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2017.10.174
更新日期:2018-03-01 00:00:00
abstract::The present research work was designed to develop dorzolamide-loaded chitosan-coated polycaprolactone nanoparticles (DRZ-CS-PCL-NPs) for improved ocular delivery. The nanoparticles were prepared by single-step emulsification technique and optimized using the three-factor three-level Box-Behnken design. The optimized D...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.09.185
更新日期:2020-11-15 00:00:00
abstract::In the present study, we have fabricated a novel chitosan based nanocomposite (g-C3N4/Ag3PO4/CS) containing g-C3N4 and Ag3PO4 nanoparticles. The fabricated nanocomposite was characterized successfully and used as a catalyst for photocatalytic degradation of ciprofloxacin (CIP) under visible light. The TEM results reve...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.08.133
更新日期:2020-12-01 00:00:00
abstract::To investigate the antitumor and antimetastatic polysaccharide from the mature leaves of green tea, GTE-II was purified using size exclusion chromatography. GTE-II consisted of 15 different sugars including rarely observed sugars such as 2-O-methyl-fucose, 2-O-methyl-xylose, apiose, aceric acid, 3-deoxy-d-manno-2-octu...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2017.02.043
更新日期:2017-06-01 00:00:00
abstract::Chitooligosaccharides (COS) display a variety of important biological activities, including antimicrobial, antitumor, anti-inflammatory, and immunoenhancing. In the present study, a COS sample (degree of polymerization 4-11, analyzed by FTIR and MALDI-TOF-MS) prepared by hydrolysis with a recombinant chitosanase was o...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2013.09.038
更新日期:2013-11-01 00:00:00