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https://www.readbyqxmd.com/read/28821142/manufacture-of-requeij%C3%A3-o-cremoso-processed-cheese-with-galactooligosaccharide
#1
P C Belsito, M V S Ferreira, L P Cappato, R N Cavalcanti, V A S Vidal, T C Pimentel, E A Esmerino, C F Balthazar, R P C Neto, M I B Tavares, P B Zacarchenco, M Q Freitas, M C Silva, R S L Raices, G M Pastore, M A R Pollonio, A G Cruz
The addition of galactooligosaccharide, (GOS, 0, 1.5, 3 or 4g/100g) on the quality parameters of requeijão cremoso was investigated. Chemical characteristics (pH, moisture, fat and protein), color (L*, a*, b*), water mobility by TD- nuclear magnetic resonance, rheology (flow curve and oscillatory tests), microstructure and sensory acceptance (consumer test) were evaluated. The addition of GOS provided a denser and compact structure and reduced number and size of fat globules. Increased GOS level (3 and 4g/100g) improved the softness and spreadability (decrease of G', G″ and apparent viscosity and an increase of tan δ and melting index) and impacted positively on the aroma and taste of the requeijão cremoso...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821119/tailoring-of-temperature-and-ph-responsive-cotton-fabric-with-antimicrobial-activity-effect-of-the-concentration-of-a-bio-barrier-forming-agent
#2
Danaja Štular, Ivan Jerman, Barbara Simončič, Brigita Tomšič
A stimuli-responsive cotton fabric was designed using temperature and pH-responsive poly-N-isopropylacrylamide (poly-NiPAAm) and chitosan (PNCS) microgel as a carrier of antimicrobially active 3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride (Si-QAC), which forms a bio-barrier on the fibre surface. The influence of Si-QAC on the moisture management and thermoregulation abilities of the PNCS microgel was investigated. Using a pad-dry cure method, Si-QAC was applied to a 100% cotton fabric model in concentrations ranging from 0...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821108/modified-bacterial-cellulose-based-self-healable-polyeloctrolyte-film-for-wound-dressing-application
#3
Moumita Khamrai, Sovan Lal Banerjee, Patit P Kundu
In this investigation, we prepare a self-healable polyelectrolyte film via crosslinking the cationically charged chitosan (Cts) with anionically modified bacterial cellulose (BC), which is a green source of nano-filler. This polyelectrolyte film is able to show dynamic self-healing activity at physiological pH condition via adapting ionic interaction, a state of non-covalent bond. BC was prepared using Glucanoacetobacter xylinus (MTCC7795) bacteria and after that its surface was modified with anionic poly(acrylic acid) using "grafting from" technique...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821086/optimization-purification-and-structural-characterization-of-a-dextran-produced-by-l-mesenteroides-isolated-from-chinese-sauerkraut
#4
Renpeng Du, Hanwen Xing, Yanping Yang, Hanji Jiang, Zhijiang Zhou, Ye Han
A higher yield of dextran strain Leuconstoc mesenteroides TDS2-19 was isolated from Chinese sauerkraut juice. Effects of the three main factors on exopolysaccharide (EPS) yield were investigated by central composite design (CCD) and the optimum composition was sucrose 117.48g/L, sodium acetate 4.10g/L, and initial pH 6.88. Optimum results showed that EPS yield was increased to 71.23±2.25g/L in 48h fermentation, 31.24% higher than before. The molecular weight (Mw) of ESP was 8.79×10(7)Da, as determined by high-performance size-exclusion chromatography (HPSEC)...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821079/highly-monodisperse-colloidal-coacervates-based-on-a-bioactive-lactose-modified-chitosan-from-synthesis-to-characterization
#5
Franco Furlani, Pasquale Sacco, Eleonora Marsich, Ivan Donati, Sergio Paoletti
The present contribution aims at describing the fabrication of coacervates in the nano-size range starting from a 1-deoxylactit-1-yl chitosan (in this manuscript termed as CTL60) and the multivalent anion tripolyphosphate (TPP). Colloidal coacervates have been obtained for precise values of the molar ratio of TPP to CTL60 repeating unit. Coacervation is ensured only at pH 4.5 and not at 7.4, thus demonstrating the key role of electrostatic interactions in the stabilization of the coacervates. At a variance with chitosan, CTL60 favors the formation of highly homogeneous coacervates with very low values of the polydispersity index (PDI)...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821078/fabrication-of-magnetic-particles-imprinted-cellulose-based-biocomposites-for-chromium-vi-removal
#6
Soodamani Periyasamy, Venkatrajan Gopalakannan, Natrayasamy Viswanathan
The present study was focused on Cr(VI) removal using eco-friendly materials like cellulose (Cel), hydrotalcite (HT), hydroxyapatite (HAp) and their composite forms. The cellulose/hydrotalcite (CelHT) and cellulose/hydroxyapatite (CelHAp) composites were synthesized by dispersing HT and HAp individually in cellulose polymeric matrix. To enhance the Cr(VI) sorption capacity (SC) and easy separation, cellulose supported magnetic composites namely iron-oxide coated cellulose/hydrotalcite (Fe3O4@CelHT) and cellulose/hydroxyapatite (Fe3O4@CelHAp) were synthesized by in situ fabrication method...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821068/radiation-synthesis-and-performance-of-novel-cellulose-based-microsphere-adsorbents-for-efficient-removal-of-boron-iii
#7
Siqi Liu, Min Xu, Tianlin Yu, Dong Han, Jing Peng, Jiuqiang Li, Maolin Zhai
A novel cellulose-based microsphere containing glucamine groups, referred as CVN, was successfully synthesized by radiation-induced graft polymerization of 4-vinylbenzyl chloride onto cellulose microspheres and subsequent functionalization with N-methyl-d-glucamine. The adsorption by CVN for boron (III) from aqueous solutions was evaluated systematically by batch adsorption technique. Langmuir models could fit well with the adsorption behavior of CVN. The CVN adsorbents exhibited a high adsorption capacity up to 12...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821067/optimization-of-high-purity-chitin-and-chitosan-production-from-illex-argentinus-pens-by-a-combination-of-enzymatic-and-chemical-processes
#8
José Antonio Vázquez, Diana Noriega, Patricia Ramos, Jesus Valcarcel, Ramon Novoa-Carballal, Lorenzo Pastrana, Rui L Reis, Ricardo I Pérez-Martín
The present report illustrates the optimisation of the experimental conditions for the chemical and enzymatic production of chitin and chitosan from Illex argentinus pen by-products. Optima conditions for chitin isolation were established at 0.82M NaOH/36.4°C, 57.5°C/pH=9.29, 59.6°C/pH=9.30 and 49.6°C/pH=5.91 for chemical, alcalase, esperase and neutrase deproteinization, respectively. Chitin samples were subsequently deacetylated by alkaline treatment reaching the highest degrees of deacetylation (DD>93%) at 61...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821060/construction-and-characterization-of-nanosized-curdlan-sulfate-chitosan-polyelectrolyte-complex-toward-drug-release-of-zidovudine
#9
Jing-Kun Yan, Yao-Yao Wang, Wen-Yi Qiu, Jian-Yong Wu
In this study, as-synthesized curdlan sulfate (CRDS) with a flexible random coil chain was selected as a polyanion to construct nanosized polyelectrolyte complexes (PECs) with a polycation, chitosan (CS), via electrostatic interactions. Nanosized PECs were formed simply by mixing CRDS (0.5mg/mL) and CS (0.5mg/mL) at a mass ratio of 2:1 at pH 3.5. The CRDS/CS PECs exhibited a spherical morphology with a Z-average diameter of around 180nm and a zeta potential value of about -38mV. Subsequently, zidovudine (AZT) as a model antiviral drug was successfully encapsulated into the nanosized PECs with a favorable drug loading efficiency...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821056/fabrication-of-salecan-poly-amps-co-hmaa-semi-ipn-hydrogels-for-cell-adhesion
#10
Xinyu Hu, Yongmei Wang, Liangliang Zhang, Man Xu, Wei Dong, Jianfa Zhang
Salecan is a novel water-soluble extracellular β-glucan and has excellent physicochemical and biological properties. A series of hydrogels were fabricated from Salecan and poly(2-acrylamido-2-methylpropanesulfonic acid-co-N-hydroxymethyl acrylamide) (poly(AMPS-co-HMAA), PAH) by semi-IPN technique. The introduction of Salecan into the PAH network endows the system with enhanced cell adhesion properties. These semi-IPN hydrogels with open interconnected pores had pH and salt-sensitive swelling behavior. The increase in the content of hydrophilic Salecan could enhance the water uptake of the hydrogels...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821050/clean-approach-to-synthesis-of-graphene-like-cufe2o4-polysaccharide-resin-nanohybrid-bifunctional-compound-for-dye-adsorption-and-bacterial-capturing
#11
Mostafa Hossein Beyki, Sarina Ehteshamzadeh Ganjbakhsh, Sara Minaeian, Farzaneh Shemirani
Focus of this research is on employment of a green route to prepare magnetic CuFe2O4@polysaccharide resin for environmental remediation purpose. The method is including solvent free solid state synthesis of copper ferrite nanoparticles by combustion route using cellulose as fuel. Then polysaccharide resin as well as its magnetic composite was prepared by using glucose, citric acid and copper ferrite as solid raw materials. Characterization study using FESEM and TEM images showed that as synthesized resin possesses graphene like structure as ferrite nanoparticles are dispersed in the matrice of resin...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821045/production-of-cellulose-nanofibers-using-phenolic-enhanced-surface-oxidation
#12
Iman Beheshti Tabar, Ximing Zhang, Jeffrey P Youngblood, Nathan S Mosier
In this study we demonstrate that lignin monomers formed as byproducts of pulping or bioprocessing of lignocellulosic biomass is an effective enhancer to oxidize cellulose surfaces with ozone for the production of cellulose nanofibers (CNF). Never dried softwood pulp with minimum mercerization was enzymatically treated leading to a homogeneous pulp slurry with a higher reactivity. The slurry was oxidized by ozone gas in the presence of syringic acid, a lignin degradation model compound, as an oxidation enhancer at room temperature and pH 11...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821037/effects-of-esterification-on-the-structural-physicochemical-and-flocculation-properties-of-dextran
#13
Ruo-Han Li, Tao Zeng, Min Wu, Hong-Bin Zhang, Xue-Qin Hu
Dextran is an interesting starting material to design new functional polymers by chemical modification. Potential applications of dextran in water treatment should be increasingly developed and the structure properties of dextran derivatives should be focused on. In the study, dextran ester was synthesized through the esterification reaction of hydroxyl. The structure and some physicochemical properties of synthesized dextran ester were characterized and further analyzed. And we found that dextran ester could exert desirable flocculation performance in both kaolin and sugarcane juice under acidic conditions but not lower than pH 4...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821031/surface-deacetylated-chitin-nanofibers-reinforced-with-a-sulfobutyl-ether-%C3%AE-cyclodextrin-gel-loaded-with-prednisolone-as-potential-therapy-for-inflammatory-bowel-disease
#14
Ryo Tabuchi, Makoto Anraku, Daisuke Iohara, Takako Ishiguro, Shinsuke Ifuku, Tomone Nagae, Kaneto Uekama, Shoko Okazaki, Keizo Takeshita, Masaki Otagiri, Fumitoshi Hirayama
Surface-deacetylated chitin nanofibers (SDACNFs) reinforced with a sulfobutyl ether β-cyclodextrin (SBE-β-CD) (NFs-CDs) gel were developed to obtain a controlled release carrier of prednisolone (PD) for the treatment of colitis. PD was released slowly from the gel at both pH 1.2 and 6.8. The in vitro slow release of PD from the NFs-CDs gel was reflected in the in vivo absorption of the drug after oral administration to rats. These results suggest that a simple gel composed of a mixture of SDACNFs and SBE-β-CD has the potential for use in the controlled release of PD...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820998/photosynthesis-of-alfalfa-medicago-sativa-in-response-to-landfill-leachate-contamination
#15
Lie Yang, Tiantian Sun, Yanli Liu, Houqing Guo, Lixin Lv, Jie Zhang, Chang Liu
Thousands of unlined landfills and open dumpsites have put great threat on the security of soil and ground water due to leachate leakage. Alfalfa is believed potential as a phytoremediation plant for leachate contamination based on strong root system and the excellent capacity of removing various kinds of pollutants. A lab-scale investigation was conducted to figure out the sensitiveness of alfalfa photosynthesis in response to leachate contamination. The results demonstrated that both of the maximum photosynthetic efficiency (Fv/Fm) and net photosynthetic rate (Pn) were slightly inhibited in the high-dosage group...
August 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28820997/nh2fe3o4-sio2-supported-peroxidase-catalyzed-h2o2-for-degradation-of-endocrine-disrupter-from-aqueous-solution-roles-of-active-radicals-and-noms
#16
Jing Ai, Weijun Zhang, Guiying Liao, Hua Xia, Dongsheng Wang
In this work, magnetic Fe3O4 was utilized to immobilize horseradish peroxidase (IM-HRP) in order to improve its stability and reusability by crosslinking method process with glutaraldehyde. The physicochemical properties of NH2Fe3O4@SiO2 and IM-HRP were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermo-gravimetric Analysis (TGA) and Transmission electron microscopy (TEM). The thermal stability of immobilized-HRP was considerably improved in comparison with free counterpart...
August 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28820996/exploring-ozonation-as-treatment-alternative-for-methiocarb-and-formed-transformation-products-abatement
#17
A Cruz-Alcalde, C Sans, S Esplugas
Despite the high toxicity and resistance to conventional water treatments exhibited by methiocarb (MC), there are no reports regarding the degradation of this priority pesticide by means of alternative purification technologies. In this work, the removal of MC by means of ozonation was studied for the first time, employing a multi-reactor methodology and neutral pH conditions. The second-order rate constants of MC reaction with molecular ozone (O3) and formed hydroxyl radicals (OH·) were determined to be 1...
August 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28820993/changing-profiles-of-bound-water-content-and-distribution-in-the-activated-sludge-treatment-by-nacl-addition-and-ph-modification
#18
Dong-Qin He, Ying-Jie Zhang, Chuan-Shu He, Han-Qing Yu
Currently the dewatering of activated sludge from wastewater treatment plants is a problem not well solved. Extracellular polymeric substances (EPS), including loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS), are highly hydrated biopolymers and play important roles in sludge dewatering. In the present work, two types of treatments, i.e., salt addition and pH modification, were proposed to evaluate the effects of bound water content and its distribution on the dewatering performance of activated sludge...
August 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28820989/permanganate-bisulfite-pm-bs-conditioning-horizontal-electro-dewatering-hed-of-activated-sludge-effect-of-reactive-mn-iii-species
#19
Xinxin Guo, Yili Wang, Dongsheng Wang
A novel activated sludge (AS) conditioning method through permanganate/bisulfate (PM/BS) process was proposed. The method involved a new conditioner of reactive Mn(III) intermediate. Moreover, a Mn(III) conditioning-horizontal electro-dewatering (Mn(III) C-HED) process was established to improve AS dewatering performance. Underlying mechanisms were unraveled by investigating changes in physicochemical characteristics, scanning electron microscope (SEM) morphology, and transformation of water and organic matters...
August 11, 2017: Water Research
https://www.readbyqxmd.com/read/28820975/features-of-proteolytic-properties-of-tetraphenylporphyrin-complex-with-lanthanide-group-metals
#20
Elena A Tobolkina, Tatiana A Skripnikova, Anna A Starikova, Galina I Shumilova, Andrey A Pendin
Demetallation of metalloporphyrin molecules is one of the essential degradation reactions in photosynthesis. The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. pH values, at which the metal ions leave the metalloporphyrin complex were established using two-phase spectrophotometric titration with potentiometric pH-control. The pH values decrease with the increase of atomic numbers of lanthanide groups, as well as with increase of 4f-electrons...
August 12, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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