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https://www.readbyqxmd.com/read/28821187/genetic-dissection-of-seedling-stage-salinity-tolerance-in-rice-using-introgression-lines-of-a-salt-tolerant-landrace-nona-bokra
#1
Venkata Ramana Rao Puram, John Ontoy, Steven Linscombe, Prasanta K Subudhi
Salinity is an important abiotic stress affecting rice production worldwide. Development of salt tolerant varieties is the most feasible approach for improving rice productivity in salt affected soils. In rice, seedling stage salinity tolerance is crucial for better crop establishment. Quantitative trait loci (QTL) mapping using introgression lines (ILs) is useful for identification and simultaneous transfer of desirable alleles into elite genetic background. In the present study, 138 ILs derived from the cross between a high yielding elite salt susceptible japonica rice cultivar Jupiter and a salt tolerant indica landrace Nona Bokra were evaluated for salt tolerance at seedling stage in a hydroponics experiment and were genotyped using 126 simple sequence repeat markers...
September 1, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28821162/oral-administration-of-thymoquinone-mitigates-the-effect-of-cisplatin-on-brush-border-membrane-enzymes-energy-metabolism-and-antioxidant-system-in-rat-intestine
#2
Faaiza Shahid, Zeba Farooqui, Subuhi Abidi, Iqbal Parwez, Farah Khan
Cisplatin (CP) is a widely used chemotherapeutic agent that elicits severe gastrointestinal toxicity. Nigella sativa, a member of family Ranunculaceae, is one of the most revered medicinal plant known for its numerous health benefits. Thymoquinone (TQ), a major bioactive component derived from the volatile oil of Nigella sativa seeds, has been shown to improve gastrointestinal functions in animal models of acute gastric/intestinal injury. In view of this, the aim of the present study was to investigate the protective effect of TQ on CP induced toxicity in rat intestine and to elucidate the mechanism underlying these effects...
August 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28821150/functionalized-alginate-with-liquid-like-behaviors-and-its-application-in-wet-spinning
#3
Zhen Sang, Wenqian Zhang, Zhiyuan Zhou, Huakang Fu, Yeqiang Tan, Kunyan Sui, Yanzhi Xia
Alginate is a kind of marine-derived plant polysaccharide with useful properties including inherent flame-retardancy and biocompatibility, yet poor flowability and low processing efficiency induced by high viscosity impede its further industrial applications. In this study, PEG-substituted tertiary amines were adapted to functionalize alginate with different molecular weight via acid-base reaction to improve the flowability. Based on alginate with low molecular weight, alginate fluids exhibited excellent flowability at room temperature in the absence of solvent...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821141/designed-biocompatible-nano-inhibitor-based-on-poly-%C3%AE-cyclodextrin-ester-for-reduction-of-the-dehp-migration-from-plasticized-pvc
#4
Ahmad Raeisi, Khalil Faghihi, Meisam Shabanian
The easy migration of di(2-ethylhexyl) phthalate (DEHP) from the plasticized PVC (P-PVC) poses a serious threat to human health and the ecosystems. Thus, its control migration from the P-PVC products is very important. In this work, a poly(β-cyclodextrin-ester) network (β-CDP) was synthesized via reaction of β-cyclodextrin with 3,3',4,4'-benzophenone tetracarboxylic dianhydride. As a potential inhibitor for reduction of the DEHP migration, the β-CDP was grafted to Fe3O4 nanoparticles. Poly(β-cyclodextrin-ester) functionalized Fe3O4 nanoparticles (MNP-CDP) has been used in PVC/DEHP system as a reactive nano-inhibitor to reduce DEHP migration...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821140/the-potential-of-cashew-gum-functionalization-as-building-blocks-for-layer-by-layer-films
#5
Álvaro J Leite, Rui R Costa, Ana M S Costa, Jeanny S Maciel, José F G Costa, Regina C M de Paula, João F Mano
Cashew gum (CG), an exudate polysaccharide from Anacardium occidentale trees, was carboxymethylated (CGCm) and oxidized (CGO). These derivatives were characterized by FTIR and zeta potential measurements confirming the success of carboxymethylation and oxidation reactions. Nanostructured multilayered films were then produced through layer-by-layer (LbL) assembly in conjugation with chitosan via electrostatic interactions or Schiff bases covalent bonds. The films were analyzed by QCM-D and AFM. CG functionalization increased the film thickness, with the highest thickness being achieved for the lowest oxidation degree...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821139/charge-functionalized-and-mechanically-durable-composite-cryogels-from-q-nfc-and-cs-for-highly-selective-removal-of-anionic-dyes
#6
Yufei Chen, Jing Ru, Biyao Geng, Haiying Wang, Congcong Tong, Chungui Du, Shengchun Wu, Hongzhi Liu
A composite cryogel was prepared from quaternized nanofibrillated cellulose (Q-NFC) and chitosan (CS) through a combination of freeze-drying and cross-linking with epichlorohydrin. The specific surface area of the composite cryogel was approximately two times that of Q-NFC cryogel. And the composite cryogel exhibited superior adsorption properties of anionic dyes than either the Q-NFC or CS cryogel controls. The adsorption isotherm well fitted the Langmuir model with the maximum theoretical adsorption capacity up to 473...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821136/discovery-of-enzymatically-depolymerized-heparins-capable-of-treating-bleomycin-induced-pulmonary-injury-and-fibrosis-in-mice
#7
Yishu Yan, Shanshan Du, Yang Ji, Nan Su, Yi Wang, Xiang Mei, Wenming Zhu, Dong He, Yuan Lu, Chong Zhang, Xin-Hui Xing
Heparin has recently been shown to slow down idiopathic pulmonary fibrosis (IPF) process and improve survival of patients in some cases. To improve the anti-IPF function while minimizing their side effects, we developed heparin libraries with different structures depolymerized by single or combined heparinases, and systematically screened the efficacy of the different heparins for treatment of Bleomycin-induced pulmonary injury and fibrosis using mice model. Then we characterized the structural properties of the components capable of treating pulmonary injury and fibrosis by use of chip-based amide hydrophilic interaction chromatography (HILIC)-fourier transform (FT)-ESI-MS, polyacrylamide gel electrophoresis (PAGE), and high performance liquid chromatography (HPLC)...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821122/-click-hyaluronan-based-nanohydrogels-as-multifunctionalizable-carriers-for-hydrophobic-drugs
#8
Giuliana Manzi, Nicole Zoratto, Silvia Matano, Rocchina Sabia, Claudio Villani, Tommasina Coviello, Pietro Matricardi, Chiara Di Meo
Highly hydrophilic and biocompatible nanocarriers based on polysaccharide hydrogels (nanohydrogels, NHs) were shown to be promising systems for drug delivery applications. Following the idea of these emerging drug carriers, the aim of the present work was to develop self-assembled hydrogel nanoparticles based on amphiphilic derivatives of hyaluronic acid (HA) and riboflavin (Rfv), synthesized by "click" Copper(I)-catalyzed Azide-Alkyne Cycloaddition (CuAAC) reaction. The obtained amphiphilic product (HA-c-Rfv) was able to form nanohydrogels in aqueous environments, in particular by applying an innovative autoclave-based method...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821120/enhanced-permeability-and-antifouling-performance-of-cellulose-acetate-ultrafiltration-membrane-assisted-by-l-dopa-functionalized-halloysite-nanotubes
#9
REVIEW
Keguang Mu, Dalun Zhang, Ziqiang Shao, Dujian Qin, Yalong Wang, Shuo Wang
l-Dopa functionalized halloysite nanotubes (HNTs) were prepared by the self-polymerization of l-dopa in the weak alkaline condition. Then different contents of l-dopa coated HNTs (LPDHNTs) were blended into cellulose acetate to prepare enhanced performance ultrafiltration membranes via the phase inversion method. The HNTs and LPDHNTs were characterized by FTIR, XPS, and TEM anysis. And the membranes morphologies, separation performance, antifouling performance, mechanical properties and hydrophilicity were also investigated...
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
#10
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/28821118/sulfated-polysaccharide-from-cyclocarya-paliurus-enhances-the-immunomodulatory-activity-of-macrophages
#11
Yue Yu, Mingyue Shen, Zhijun Wang, Yuanxing Wang, Mingyong Xie, Jianhua Xie
In this study, a sulfated polysaccharide (S-CP1-8) was obtained from Cyclocarya paliurus by chlorosulfonic acid-pyridine method. S-CP1-8 was chemical characterized and cultured with macrophage RAW264.7 cells to evaluate its immunomodulatory activity. Preliminary physicochemical analysis identified arabinose (Ara), galactose (Gal) and glucose (Glc) were the major monosaccharides of S-CP1-8, with average Molecular weight (Mw) of 970kDa and contained sulfate with degree of substitution (DS) of 0.12. Meanwhile, our findings demonstrated that tumor necrosis factor (TNF)-α, interleukin (IL)-1β and IL-6 secretion levels were significantly increased by S-CP1-8 treatment in RAW264...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821111/a-facile-sodium-alginate-based-approach-to-improve-the-mechanical-properties-of-recycled-fibers
#12
Yuan-Yuan Bai, Yan-Hao Lei, Xiao-Jun Shen, Jing Luo, Chun-Li Yao, Run-Cang Sun
The application of recycled fibers is steadily increasing in various paper products recently. It is necessary to improve the mechanical properties of paper products made from these fibers. An eco-friendly polymeric additive, sodium alginate (SA), was prepared from waste seaweeds and developed as functional additives. The properties of SA were characterized by proton nuclear magnetic resonance, Fourier transform infrared spectroscopy, thermal gravity analysis, gel permeation chromatography, and compared with the commercial SA...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821110/unraveling-the-reaction-mechanism-of-silver-ions-reduction-by-chitosan-from-so-far-neglected-spectroscopic-features
#13
Ana Patrícia Carapeto, Ana Maria Ferraria, Ana Maria Botelho do Rego
Metallic silver nanoparticles were synthesized in aqueous solution using chitosan, as both reducing and stabilizing agent, and AgNO3 as silver precursor aiming the production of solid ultra-thin films. A systematic characterization of the resulting system as a function of the initial concentrations was performed. The combination of UV-vis absorption - and its quantitative analysis - with X-ray photoelectron spectra, light scattering measurements and atomic force microscopy allowed obtaining a rational picture of silver reduction mechanism through the identification of the nature of the formed reduced/oxidized species...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821102/microencapsulation-of-sardine-oil-application-of-vanillic-acid-grafted-chitosan-as-a-bio-functional-wall-material
#14
K V Vishnu, Niladri S Chatterjee, K K Ajeeshkumar, R G K Lekshmi, C S Tejpal, Suseela Mathew, C N Ravishankar
Vanillic acid grafted chitosan (Va-g-Ch) was evaluated as a new antioxidant wall material for microencapsulation of polyunsaturated fatty acid rich sardine oil. A high grafting ratio of 305mg vanillic acid equivalent/g of polymer was achieved using a free radical mediated grafting reaction. Oil in water emulsion was prepared with an optimised combination of Va-g-Ch and Tween 20 (3.2:1). Sardine oil loaded microparticles (SO-M) were produced (∼75% yield) by spray drying. The average diameter and polydispersity Index (PDI) of the particles were found to be 2...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821099/xyloglucan-gelation-induced-by-enzymatic-degalactosylation-kinetics-and-the-effect-of-the-molar-mass
#15
Caroline Novak Sakakibara, Maria Rita Sierakowski, Christophe Chassenieux, Taco Nicolai, Rilton Alves de Freitas
Gelation kinetics of aqueous solutions of xyloglucan (XG) extracted from H. courbaril seeds were investigated, in-situ, during enzymatic removal of galactose units by oscillatory shear rheological measurements, at different XG and enzyme (β-galactosidase) concentrations. Increasing the enzyme concentration (Cenz) led to an increase of the gelation rate. Master curves of the evolution of the storage shear modulus at different Cenz could be formed by time-Cenz superposition showing that Cenz influenced the kinetics, but not the gelation process and the final gel stiffness...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821092/the-effect-of-temperature-on-the-colligative-properties-of-food-grade-konjac-gum-in-water-solutions
#16
Joanna Kruk, Kacper Kaczmarczyk, Anna Ptaszek, Urszula Goik, Paweł Ptaszek
This research paper presents the results of tests on the colligative properties of konjac gum chains in water solutions. For this purpose, the measurements of osmotic pressure and intrinsic viscosity of aqueous solutions, in the function of konjac gum concentration and temperature were carried out. The applied methods allowed for the determination of the second osmotic virial coefficients B2, which raised with the increase of temperature. It indicate that increase of temperature causes higher affinity of polysaccharide's chains to water...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821087/in-vivo-antihyperlipidemic-and-antioxidant-activity-of-porphyran-in-hyperlipidemic-mice
#17
Xiaomei Wang, Weida Li, Li Xiao, Chundong Liu, Huimin Qi, Zhongshan Zhang
The hypolipidemic and antioxidant effects of porphyran from the red algae Porphyra haitanensis as a dietary supplement were evaluated in mice. The levels of serum TC, TG and LDL-C in MP group increased significantly (p<0.05 or p<0.01) by 28.5%, 29.4% and 33.5% compared with the model group. These significant rises were accompanied by significant declines of plasma HDL-C by 21.6% compared with the model group. In addition, the liver content of malondialdehyde significantly decreased, while the superoxide dismutase, catalase, glutathione peroxidase activities significantly increased...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821081/direct-characterization-of-cotton-fabrics-treated-with-di-epoxide-by-nuclear-magnetic-resonance
#18
Min Xiao, Joronia Chéry, Ivan Keresztes, David B Zax, Margaret W Frey
A non-acid-based, di-functional epoxide, neopentyl glycol diglycidyl ether (NPGDGE), was used to modify cotton fabrics. Direct characterization of the modified cotton was conducted by Nuclear Magnetic Resonance (NMR) without grinding the fabric into a fine powder. NaOH and MgBr2 were compared in catalyzing the reaction between the epoxide groups of NPGDGE and the hydroxyl groups of cellulose. Possible reaction routes were discussed. Scanning electron microscopy (SEM) images showed that while the MgBr2-catalyzed reaction resulted in self-polymerization of NPGDGE, the NaOH-catalyzed reaction did not...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821072/understanding-the-mechanisms-of-oxygen-diffusion-through-surface-functionalized-nanocellulose-films
#19
Maria Soledad Peresin, Kari Kammiovirta, Harri Heikkinen, Leena-Sisko Johansson, Jari Vartiainen, Harri Setälä, Monika Österberg, Tekla Tammelin
A concept for direct surface modification on self-standing films of cellulose nanofibrils (CNF) is demonstrated using an aminosilane group in cellulose compatible solvent (dimethyl acetamide, DMA). The chemically modified structure efficiently prevents the oxygen molecules from interacting with the nanocellulose film in the presence of water molecules. Oxygen permeability values lower than 1mLmmm(-2)day(-1)atm(-1) were achieved at extremely high levels of relative humidity (RH95%). The aminosilane reaction is compared to conventional hydrophobization reaction using hexamethyldisilazane...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821071/on-the-use-of-ion-crosslinked-nanocellulose-hydrogels-for-wound-healing-solutions-physicochemical-properties-and-application-oriented-biocompatibility-studies
#20
Alex Basu, Jonas Lindh, Eva Ålander, Maria Strømme, Natalia Ferraz
Calcium ion-crosslinked nanofibrillated cellulose (NFC) hydrogels were investigated as potential materials for wound healing dressings. The physicochemical properties of the hydrogels were examined by rheology and water retention tests. Skin cells and monocytes were selected for application-oriented biocompatibility studies. The NFC hydrogels presented entangled fibrous networks and solid-like behavior. Water retention tests showed the material´s potential to maintain a suitable moist environment for different type of wounds...
October 15, 2017: Carbohydrate Polymers
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