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International Journal of Biological Macromolecules

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https://www.readbyqxmd.com/read/28433863/corrigendum-to-structural-elucidation-of-a-polysaccharide-from-lonicera-japonica-flowers-and-its-neuroprotective-effect-on-cerebral-ischemia-reperfusion-injury-in-rat-int-j-biol-macromol-99-2017-february-28-350-357
#1
Danying Su, Shi Li, Wei Zhang, Jing Wang, Jingjing Wang, Manhua Lv
No abstract text is available yet for this article.
April 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28433770/preparation-of-low-digestible-and-viscoelastic-tigernut-cyperus-esculentus-starch-by-bacillus-acidopullulyticus-pullulanase
#2
Xiaolei Li, Jingchao Fu, Yujuan Wang, Fumin Ma, Dan Li
Tigernut starch is an underutilized food resource. In this study, pullulanase (PUL) hydrolysis was used to change its physiochemical properties for different food applications. The content of low digestible fractions, resistant starch and slow digestible starch, in PUL modified tigernut starch significantly increased from 2.03% to 25.08% (P <0.05) using 120U/g starch of PUL in the debranching reaction. The paste or dispersion of PUL modified tigernut starch had a significantly decreased viscoelasticity (P <0...
April 19, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28433769/healing-activity-evaluation-of-the-galactomannan-film-obtained-from-cassia-grandis-seeds-with-immobilized-cratylia-mollis-seed-lectin
#3
Priscilla B S Albuquerque, Paulo A G Soares, Adelmo C Aragão-Neto, Giwellington S Albuquerque, Luís C N Silva, Maria H M Lima-Ribeiro, Jacinto C Silva Neto, Luana C B B Coelho, Maria T S Correia, José A C Teixeira, Maria G Carneiro-da-Cunha
Galactomannan films from Cassia grandis seeds, associated or not with Cramoll 1,4, were used on topical wounds of rats for the evaluation of the healing process during 14 days. All of the films were evaluated by cytotoxic assay, FTIR and lectin hemagglutinating activity (HA). Forty-five male rats were submitted to aseptic dermal wounds (Ø=0.8cm) and divided in groups (n=15): control, test 1, and test 2, treated respectively with saline, galactomannan film and film with immobilized Cramoll 1,4. Macroscopic evaluations were performed by clinical observations and area measurements, and microscopic analysis by histological criteria...
April 19, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28431946/relationship-between-calorimetric-profiles-and-differential-melting-curves-for-natural-dnas
#4
Chun-Ling Chang, Alexander S Fridman, Roger M Wartell, Chin-Kun Hu, Dmitri Y Lando
Many experiments demonstrate that regions with higher GC-content in natural DNAs unwind at higher temperatures adsorbing more heat than equivalently sized regions with lower GC-content. This simple observation implies that normalized calorimetric melting profiles (calorimetric cDMCs) will not be equivalent differential melting curves (DMCs). We propose simple expressions for long natural and random DNA sequences to reciprocally convert DMCs and corresponding calorimetric cDMCs. The expressions are confirmed by the Poland-Fixman-Freire method and an approach based upon mixtures of homopolymeric duplexes...
April 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28431945/in-vitro-fermentation-behaviors-of-fucosylated-chondroitin-sulfate-from-pearsonothuria-graeffei-by-human-gut-microflora
#5
Chao-Yang Wei, Ning-Bo Liao, Yu Zhang, Xing-Qian Ye, Shan Li, Ya-Qin Hu, Dong-Hong Liu, Robert J Linhardt, Xin Wang, Shi-Guo Chen
A fucosylated chondroitin sulfate (FCS-pg) with highly repeated structure from Pearsonothuria graeffei was subjected to a in vitro fermentation model to investigate its fermentability and effects on human gut microflora. High performance liquid chromatography (HPLC) measurement found FCS-pg can be fermented to short chain fatty acids (SCFAs) by gut microflora from partial human fecal samples. 16S rRNA gene-based polymerase chain reaction-based denaturing gradient gel electrophoresis (PCR-DGGE) profiling and real-time quantitative PCR analysis showed that FCS-pg mainly increased the proportions of Clostridium cluster XI, Bacteriodes prevotella group, Bifidobacterium genus, Clostridium cluster I and Clostridium cluster XIVab, whereas the numbers of the Enterobacteriaceae and Lactobacillus decreased...
April 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28431944/green-seaweed-enteromorpha-compressa-chlorophyta-ulvaceae-derived-sulphated-polysaccharides-inhibit-herpes-simplex-virus
#6
Nayara Lopes, Sayani Ray, Samantha Fernandes Espada, Weslei Andrade Bomfim, Bimalendu Ray, Lígia Carla Faccin-Galhardi, Rosa Elisa Carvalho Linhares, Carlos Nozawa
The herpes simplex virus (HSV) diseases represent a relevant medical and social problem due to their communicability and recurrence following latency. The green algae are rich source of polysaccharides referred to as ulvans, reported as being biologically and pharmacologically active. In this work, we analyzed the activity of seven chemically modified polysaccharides from Enteromorpha compressa (Chlorophyta, Ulvaceae), against HSV. Only the derivative named SU1F1 showed satisfactory viral inhibition activity, with a high selectivity index, and, therefore, it was submitted to analysis of the probable mechanism of action and structure...
April 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28431943/expression-and-purification-of-p70%C3%AE-ct104-s6-k-a-72-kda-c-terminal-truncated-p70s6-kinase-gst-fusion-protein-in-bacterial-expression-system
#7
Younis Mohammad Hazari, Irfana Reshi, Mudasir Habib, Khalid Majid Fazili
The p70ΔCT104 S6K is a 421 amino acid residue long truncated form of p70S6 kinase, with 104 amino acids residues cleaved from the carboxyl terminal end of the original protein. The p70ΔCT104 S6K was cloned in E. coli DH5α and successfully expressed in E. coli BL21 (DE3) strain. Western blot with rabbit polyclonal anti-GST antibody was used to follow the protein during expression and purification. The protein purification was achieved by affinity chromatography using Glutathione resin-agarose beads, followed by chromatography on a spin concentration column...
April 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28431942/chitosan-based-nanocomplexes-for-simultaneous-loading-burst-reduction-and-controlled-release-of-doxorubicin-and-5-fluorouracil
#8
Antonio Di Martino, Pavel Kucharczyk, Zdenka Capakova, Petr Humpolicek, Vladimir Sedlarik
In this work, nanocomplexes based on chitosan grafted by carboxy-modified polylactic acid (SPLA) were prepared with the aim of loading simultaneously two anticancer drugs - doxorubicin and 5-fluorouracil, as well as to control their release, reduce the initial burst and boost cytotoxicity. The SPLA was prepared by a polycondensation reaction, using pentetic acid as the core molecule, and linked to the chitosan backbone through a coupling reaction. Nanocomplexes loaded with both drugs were formulated by the polyelectrolyte complexation method...
April 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28431941/bio-catalytic-performance-and-dye-based-industrial-pollutants-degradation-potential-of-agarose-immobilized-mnp-using-a-packed-bed-reactor-system
#9
Muhammad Bilal, Muhammad Asgher, Hafiz M N Iqbal, Hongbo Hu, Wei Wang, Xuehong Zhang
In this study, the matrix-entrapment technique was adopted to immobilize a novel manganese peroxidase (MnP). Agarose beads developed from 3.0% agarose concentration furnished the preeminent immobilization yield (92.76%). The immobilized MnP exhibited better resistance to changes in the pH and temperature as compared to the free counterpart, with optimal conditions being pH 6.0 and 45°C. Thermal and storage stability characteristics were significantly improved after immobilization, and the immobilized-MnP displayed higher tolerance against different temperatures than free MnP state...
April 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28428129/three-phase-partitioning-a-scalable-method-for-the-purification-and-recovery-of-cucumisin-a-milk-clotting-enzyme-from-the-juice-of-cucumis-melo-var-reticulatus
#10
Mohammed Gagaoua, Ferhat Ziane, Sabrina Nait Rabah, Nawel Boucherba, Amel Ait Kaki El-Hadef El-Okki, Amel Bouanane-Darenfed, Kahina Hafid
Cucumisin [EC 3.4.21.25] was first purified from Cucumis melo var. reticulatus juice by three-phase partitioning (TPP). Optimum purification parameters of the TPP system were determined as 60% ammonium sulfate saturation with 1.0:1.25 ratio of crude extract: t-butanol at pH and temperature of 8.0 and 20°C, respectively. Cucumisin was purified with 4.61 purification fold and 156% activity recovery. The molecular weight of the recovered cucumisin was determined as 68.4kDa and its isoelectric point is 8.7. Optimum pH and temperature of cucumisin were pH 9...
April 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28428128/novel-combination-of-zero-valent-cu-and-ag-nanoparticles-cellulose-acetate-nanocomposite-for-the-reduction-of-4-nitro-phenol
#11
Farman Ullah Khan, Asimullah, Sher Bahadar Khan, Tahseen Kamal, Abdullah M Asiri, Ihsan Ullah Khan, Kalsoom Akhtar
A very simple and low-cost procedure has been adopted to synthesize efficient copper (Cu), silver (Ag) and copper-silver (Cu-Ag) mixed nanoparticles on the surface of pure cellulose acetate (CA) and cellulose acetate-copper oxide nanocomposite (CA-CuO). All nanoparticles loaded onto CA and CA-CuO presented excellent catalytic ability, but Cu-Ag nanoparticles loaded onto CA-CuO (Cu-Ag/CA-CuO) exhibited outstanding catalytic efficiency to convert 4-nitrophenol (4-NP) into 4-aminophenol (4-AP) in the presence of NaBH4...
April 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28428127/potassium-and-sodium-ions-enhance-the-activity-and-thermostability-of-1-4-%C3%AE-glucan-branching-enzyme-from-geobacillus-thermoglucosidasius-in-the-presence-of-glycerol
#12
Xiaofeng Ban, Abhishek S Dhoble, Caiming Li, Yuzhu Zhang, Zhengbiao Gu, Li Cheng, Yan Hong, Zhaofeng Li
Metal ions are essential for the performance of metal-dependent proteins and are known to be important for thermophilic proteins containing a large number of charged residues. The performance of thermophilic proteins may be influenced by metal ions through electrostatic interactions between the metal ions and charged residues. In this study, we investigated the effects of metal ions and glycerol on the activity and stability of the thermophilic 1,4-α-glucan branching enzyme (abbreviated GBE; EC 2.4.1.18) from G...
April 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28428126/interactions-of-tetracyclines-with-ovalbumin-the-main-allergen-protein-from-egg-white-spectroscopic-and-electrophoretic-studies
#13
Maria Dayanne de A Dantas, Humberto de Araújo Tenório, Thiago Inácio B Lopes, Hugo Juarez V Pereira, Anita J Marsaioli, Isis M Figueiredo, Josué Carinhanha Caldas Santos
The interactions of tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC) with ovalbumin (OVA), the main allergen protein of egg white, were investigated by molecular spectroscopy and electrophoresis at three pH conditions (1.5, 4.6 and 7.4). Molecular and synchronous fluorescence, UV-vis spectroscopy, electrophoresis and (1)H NMR were used to study the interaction process. Tetracyclines interact with ovalbumin fluorescence by a static quenching mechanism with non-fluorescent complex formation changing the native protein structure...
April 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28419829/characterization-of-polyhydroxyalkanoates-produced-by-synechocystis-salina-from-digestate-supernatant
#14
Adriana Kovalcik, Katharina Meixner, Matthias Mihalic, Wolfgang Zeilinger, Ines Fritz, Werner Fuchs, Pavel Kucharczyk, Franz Stelzer, Bernhard Drosg
The current commercial production of polyhydroxyalkanoates (PHA) is based on heterotrophic bacteria, using organic carbon sources from crops. To avoid the competition with food and feed production, cyanobacteria, metabolising PHA from carbon dioxide can be used. This research focuses on the investigation of the thermal and rheological properties of PHA polymers accumulated by Synechocystis salina, which had been cultivated in digestate supernatant and a mineral medium. The dried bacterial cells had a polymer content of 5...
April 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28419828/hypoglycemic-and-hypolipidemic-effects-of-a-polysaccharide-from-flower-buds-of-lonicera-japonica-in-streptozotocin-induced-diabetic-rats
#15
Dongying Wang, Xiangmei Zhao, Yulan Liu
Hyperglycemia and dyslipidemia are classic features for diabetes mellitus (DM). In this study, one fraction of the crude polysaccharides extracted from Lonicera japonica flower buds (LJP) were investigated for its hypolipidaemic and hypoglycaemic activities by means of streptozotocin (STZ)-inducd diabetic rats. Interestingly, after orally administrated with 800mg/kg body weight (B.W.) LJP for 42 days, the food and water intake and the levels of sugar and insulin in blood for the diatebic rats were drastically decreased, while the contents of liver and skeletal muscle glycogen and the concentrations of hepatic pyruvate kinase and hexokinase were obviously increased (p<0...
April 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28416399/fabrication-of-semisynthetic-collagenic-materials-for-mere-synergistic-adsorption-a-model-approach-of-determining-dye-allocation-by-systematic-characterization-and-optimization
#16
Mrinmoy Karmakar, Manas Mahapatra, Arnab Dutta, Pijush Kanti Chattopadhyay, Nayan Ranjan Singha
Bovine collagen was functionalized by extensive process modifications for fabricating tanned bovine collagen fibers (TBCFs), as a new semisynthetic macro-, meso- and micro- porous adsorbent, of unprecedented physicochemical properties and excellent industrial waste removal efficiency. Mere or interactive effects were rationally understood, via analyzing monomer-dimer equilibrium, H-/J-aggregate formation, H-bonding, metachromasia, dye-dye complex formation etc., through extensive UV-vis analyses, during removal of acidic, like Acid Brown 369 (AB369), Acid Red 131 (AR131) and Acid Blue 113 (AB113) and basic, like Methylene Blue (MB) dyes...
April 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28416398/synthesis-characterization-and-evaluation-of-poly-aminoethyl-modified-chitosan-and-its-hydrogel-used-as-antibacterial-wound-dressing
#17
Yubei Zhang, Qifeng Dang, Chengsheng Liu, Jingquan Yan, Dongsu Cha, Shengnan Liang, Xiaoli Li, Bing Fan
This study aims to develop new antibacterial hydrogel wound dressings composed of poly(aminoethyl) modified chitosan (PAEMCS). FTIR, (1)H NMR, and elemental analysis demonstrated that PAEMCS was successfully synthesized via grafting poly(aminoethyl) groups onto hydroxyl groups on chitin first, and removing acetyl groups from the grafted polymer afterward. XRD and TGA implied its well-defined crystallinity and thermostability. Furthermore, a series of hydrogels were fabricated under the participation of dipotassium hydrogen phosphate (DHP)...
April 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28416397/monitoring-thermal-and-chemical-unfolding-of-brugia-malayi-calreticulin-using-fluorescence-and-circular-dichroism-spectroscopy
#18
Sunita Yadav, Smita Gupta, Jitendra Kumar Saxena
Calreticulin of Brugia malayi (BmCRT) play very important role in host-parasite interaction. In previous study it was found that BmCRT is responsible for prevention of host classical complement pathway activation via its interaction with first component C1q of the human host. Therefore, BmCRT is an essential protein for parasite survival and an important drug target to fend filariasis. In the present study, we have carried out a systamatic biophysical characterization of BmCRT protein. Unfolding of BmCRT was found to be non-cooperative two-state process in the presence of both denaturant GdmCl and urea...
April 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28416396/chitosan-composite-three-dimensional-macrospheric-scaffolds-for-bone-tissue-engineering
#19
Veena Vyas, Tejinder Kaur, Arunachalam Thirugnanam
The present work deals with the fabrication of chitosan composite scaffolds with controllable and predictable internal architecture for bone tissue engineering. Chitosan (CS) based composites were developed by varying montmorillonite (MMT) and hydroxyapatite (HA) combinations to fabricate macrospheric three dimensional (3D) scaffolds by direct agglomeration of the sintered macrospheres. The fabricated CS, CS/MMT, CS/HA and CS/MMT/HA 3D scaffolds were characterized for their physicochemical, biological and mechanical properties...
April 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28414112/binding-of-erucic-acid-with-human-serum-albumin-using-a-spectroscopic-and-molecular-docking-study
#20
Gulam Rabbani, Mohammad Hassan Baig, Arif Tasleem Jan, Eun Ju Lee, Mohsin Vahid Khan, Masihuz Zaman, Abd-ElAziem Farouk Gad, Rizwan Hasan Khan, Inho Choi
Erucic acid (EA) is one of the key fatty acids usually found in canola oil, mustard oil and rapeseed oil. Consumption of EA in primates was found to cause myocardial lipidosis and cardiac steatosis. To have an insight of the effect of EA in humans, we performed in vitro interaction studies of EA with the primary plasma protein, human serum albumin (HSA). Spectroscopic (UV-vis and fluorescence) analysis of the EA-HSA interaction revealed a static mode of quenching, with binding constant Kb ∼10(4) reflecting high affinity of EA for HSA...
April 13, 2017: International Journal of Biological Macromolecules
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