keyword
MENU ▼
Read by QxMD icon Read
search

Enhancement

keyword
https://www.readbyqxmd.com/read/28821209/cued-memory-reactivation-during-sws-abolishes-the-beneficial-effect-of-sleep-on-abstraction
#1
Nora Hennies, Matthew A Lambon Ralph, Simon J Durrant, James N Cousins, Penelope A Lewis
Study Objectives: Extracting regularities from stimuli in our environment and generalizing these to new situations are fundamental processes in human cognition. Sleep has been shown to enhance these processes, possibly by facilitating reactivation-triggered memory reorganization. Here, we assessed whether cued reactivation during slow wave sleep (SWS) promotes the beneficial effect of sleep on abstraction of statistical regularities. Methods: We used an auditory statistical learning task, in which the benefit of sleep has been firmly established...
August 1, 2017: Sleep
https://www.readbyqxmd.com/read/28821164/cape-gooseberry-physalis-peruviana-juice-as-a-modulator-agent-for-hepatocellular-carcinoma-linked-apoptosis-and-cell-cycle-arrest
#2
Hanaa A Hassan, Hanaa M Serag, Makwan S Qadir, Mohamed Fawzy Ramadan
BACKGROUND: Cape gooseberry (Physalis peruviana) fruit is highly nutritious with high content of health-promoting compounds including minerals, phenolic compounds, as well as vitamins A and C. Physalis peruviana fruits were used as mutagenic, antispasmodic, anticoagulant, and antileucemis agents. OBJECTIVE: The objective of the present work was to study the role of cape gooseberry juice (CG) as a natural modulator agent for adverse aspects associated with hepatocellular carcinoma (HCC)...
August 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28821159/inhibition-of-dna-pk-enhances-chemosensitivity-of-b-cell-precursor-acute-lymphoblastic-leukemia-cells-to-doxorubicin
#3
Fatemeh Alikarami, Majid Safa, Mohammad Faranoush, Parisa Hayat, Ahmad Kazemi
DNA damage repair pathways greatly affect the response to genotoxic drugs in cancer cells, so inhibition of such pathways could be a potentially useful strategy to enhance chemosensitivity. DNA-dependent protein kinase (DNA-PK) plays a crucial role in the repair of DNA double-strand breaks (DSBs) that are probably one of the most detrimental types of DNA damage. It has been shown that DNA-PK is highly expressed in B-cell precursor acute lymphoblastic leukemia (BCP-ALL) cells. Less well appreciated was the effect of DNA-PK inhibition on sensitivity of BCP-ALL cells to DNA-damaging agents...
August 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28821158/synthesis-characterization-bioactivity-and-potential-application-of-phenolic-acid-grafted-chitosan-a-review
#4
REVIEW
Jun Liu, Huimin Pu, Shuang Liu, Juan Kan, Changhai Jin
In recent years, increasing attention has been paid to the grafting of phenolic acid onto chitosan in order to enhance the bioactivity and widen the application of chitosan. Here, we present a comprehensive overview on the recent advances of phenolic acid grafted chitosan (phenolic acid-g-chitosan) in many aspects, including the synthetic method, structural characterization, biological activity, physicochemical property and potential application. In general, four kinds of techniques including carbodiimide based coupling, enzyme catalyzed grafting, free radical mediated grafting and electrochemical methods are frequently used for the synthesis of phenolic acid-g-chitosan...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821152/the-common-lavender-lavandula-angustifolia-mill-pectic-polysaccharides-modulate-phagocytic-leukocytes-and-intestinal-peyer-s-patch-cells
#5
Yordan N Georgiev, Berit S Paulsen, Hiroaki Kiyohara, Milan Ciz, Manol H Ognyanov, Ondrej Vasicek, Frode Rise, Petko N Denev, Haruki Yamada, Antonin Lojek, Vesselin Kussovski, Hilde Barsett, Albert I Krastanov, Irina Z Yanakieva, Maria G Kratchanova
Two pectic (chPS-L1, chPS-L2) and one polyphenolic (chPP-L) fractions were obtained from lavender flowers after boiling water extraction, exhaustive removing of alcohol-soluble molecules and SEC. chPS-L1 (52.4kDa) contains mainly low-acetylated and high-methoxylated homogalacturonans (HG), and smaller rhamnogalacturonan (RG) I backbone fragments rich in 1,3,5-branched arabinan and arabinogalactan (AG) II side chains. chPS-L2 (21.8kDa) contains predominantly similarly esterified HG, followed by RGI with AGII structures and RGII...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821151/flexibility-of-backbone-fibrils-in-%C3%AE-chitin-crystals-with-different-degree-of-acetylation
#6
Zechuan Yu, Denvid Lau
Acetyl groups are backbone outreaches that enhance inter-fibril connection in chitin and chitosan fibril bundle. Removal of acetyl groups affects flexibility of chitosan fibril bundle, thereby affecting mechanical strength of chitosan-based products. Understandings of relationship between degree of acetylation and flexibility of chitin fibril bundle conduce to optimization of synthetic chitin materials. Here, the relationship is examined by performing molecular dynamics simulations. Coiling of chitin and chitosan fibril bundle with different degree of acetylation is observed and flexibility of fibrils is measured...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821138/biocompatible-chitin-carbon-nanotubes-composite-hydrogels-as-neuronal-growth-substrates
#7
Shuangquan Wu, Bo Duan, Ang Lu, Yanfeng Wang, Qifa Ye, Lina Zhang
In the past decades, extensive studies have demonstrated that carbon nanotubes (CNTs) could promote cell adhesion, proliferation and differentiation of neuronal cells. However, the potential cytotoxicity in biological systems severely restricted the utilization of CNTs as substrates for neural growth. In this study, biocompatible chitin/carbon nanotubes (Ch/CNT) composite hydrogels were developed via blending modified CNTs with chitin solution in 11wt% NaOH/4wt% urea aqueous system, and subsequently regenerating in ethanol...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821134/graphene-cyclodextrin-based-nanocomposite-hydrogel-with-enhanced-strength-and-thermo-responsive-ability
#8
Pang Zhu, Yonghong Deng, Chaoyang Wang
Dual crosslinked system has been proved to be an efficient method to obtain tough and high strength hydrogels. Herein, we synthesized a novel graphene oxide/p(acrylamide-co-poly(ethylene glycol) methyl ether methacrylate)/α-cyclodextrin (GO/P(AM-co-PEGMA)/CD) physical dual crosslinked hydrogel via copolymerization of AM and PEGMA in the α-CD/GO solution. The polymer main chains adsorb onto the GO surface resulting in the first crosslinked system and multiple hydrogen bonds between α-CDs that thread on the PEGMA side chains establish the second crosslinked system...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821128/biomimetic-composite-scaffolds-based-on-surface-modification-of-polydopamine-on-electrospun-poly-lactic-acid-cellulose-nanofibrils
#9
Zhangqiang Yang, Junhui Si, Zhixiang Cui, Jianhua Ye, Xiaofeng Wang, Qianting Wang, Kaiping Peng, Wenzhe Chen, Shia-Chung Chen
An appropriate surface chemical property is crucial in tissue engineering scaffolds, which promotes cell attachment and proliferation. A biomimetic composite scaffold with a polydopamine (PDA) coating layer on electrospun poly(lactic acid) (PLA)/cellulose nanofibrils (CNF) composite nanofiber was developed in this study. PLA/CNF composite nanofibers were fabricated and then coated via treatment with a dopamine solution. The PDA coating layer was successfully formed on the surface of the PLA/CNF composite nanofiber by using a simple, environment-friendly, and effective procedure...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821124/the-characterization-selenylation-and-antidiabetic-activity-of-mycelial-polysaccharides-from-catathelasma-ventricosum
#10
Yuntao Liu, Yuxian You, Yiwen Li, Lan Zhang, Leilei Yin, Yingbin Shen, Cheng Li, Hong Chen, Shujuan Chen, Bin Hu, Daiwen Chen
The mycelial polysaccharide from Catathelasma ventricosum (mCVP-1S) was found to be a heteropolysaccharide with an average size of 230kDa composed mainly of β-glucopyranosyl residues. The selenylation of mCVP-1S, performed using an HNO3-Na2SeO3 method, produced a series of selenized mCVP-1Ss (SemCVP-1Ss). Varying the reaction time, temperature and Na2SeO3 dosage altered the yield and selenium content of the SemCVP-1Ss. NMR spectra showed substitution mostly at C-6, and Congo red tests indicated excessive selenylation might destroy the triple-helical structure of SemCVP-1Ss...
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
#11
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/28821118/sulfated-polysaccharide-from-cyclocarya-paliurus-enhances-the-immunomodulatory-activity-of-macrophages
#12
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
#13
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/28821105/production-of-xylooligosaccharides-by-autohydrolysis-of-hazelnut-corylus-avellana-l-shell
#14
Ece Surek, Ali Oguz Buyukkileci
Hazelnut shell (HS), husk and pruning residues were characterized and evaluated for xylooligosaccharides (XOS) production by autohydrolysis. HS contained the highest amount of xylan and yielded more XOS compared to other hazelnut residues. The temperature and holding time of HS autohydrolysis greatly influenced the composition of the liquor and the remaining solid. The highest XOS yield (62% of the feedstock xylan) was obtained at 190°C and 5min of holding time. At this temperature, 30min of holding time was required to maximize the percentage of XOS with low degree of polymerization...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821103/effect-of-dual-modification-by-annealing-and-ultrahigh-pressure-on-properties-of-starches-with-different-polymorphs
#15
Shujun Wang, Peng Guo, Fengjuan Xiang, Jinrong Wang, Jinglin Yu, Shuo Wang
The effects of dual modification by annealing (ANN) and ultrahigh pressure (UHP) on properties of wheat, yam, and potato starches were investigated. Compared with the single UHP treatment (400MPa), ANN-UHP (400MPa) treatment did not alter significantly the ordered structures of wheat starch, indicating that ANN treatment enhanced the stability and resistance of starch granules to the subsequent UHP treatment. In contrast, UHP (400MPa)-ANN treatment resulted in more severe disruption of ordered structures of wheat starch than did the single UHP treatment, showing that UHP-treated starch was more vulnerable to the subsequent ANN treatment...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821078/fabrication-of-magnetic-particles-imprinted-cellulose-based-biocomposites-for-chromium-vi-removal
#16
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
#17
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/28821064/gum-tragacanth-stabilized-green-gold-nanoparticles-as-cargos-for-naringin-loading-a-morphological-investigation-through-afm
#18
Komal Rao, Muhammad Imran, Tooba Jabri, Imdad Ali, Samina Perveen, Shafiullah, Shakil Ahmed, Muhammad Raza Shah
Gold nanoparticles (AuNPs) have attracted greater scientific interests for the construction of drugs loading cargos due to their biocompatibility, safety and facile surface modifications. This study deals with the fabrication of gum tragacanth (GT) green AuNPs as carrier for Naringin, a less water soluble therapeutic molecule. The optimized AuNPs were characterized through UV-vis spectroscopy, FT-IR and atomic force microscope (AFM). Naringin loaded nanoparticles were investigated for their bactericidal potentials using Tetrazolium Microplate assay...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821059/characterization-of-alkali-treated-and-untreated-new-cellulosic-fiber-from-saharan-aloe-vera-cactus-leaves
#19
Balaji A N, Nagarajan K J
The aim of this study is to examine the use of new natural fibers, which are extracted from the Saharan aloe vera cactus plant leaves as reinforcement in polymer composites. The physicochemical, mechanical and thermal properties of the Saharan Aloe Vera Cactus Leaves (SACL) fibers are investigated, through the effect of alkali treatment. The contents of α-cellulose, hemicellulose, wax and moisture present in SACL fibers were characterized by standard test methods The mechanical properties of SACL fibers were measured through single fiber tensile test...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821058/exploration-of-permeability-and-antifouling-performance-on-modified-cellulose-acetate-ultrafiltration-membrane-with-cellulose-nanocrystals
#20
Jinling Lv, Guoquan Zhang, Hanmin Zhang, Fenglin Yang
Cellulose nanocrystals (CNCs) were introduced into cellulose diacetate (CDA) matrix via immerged phase-inversion process, aiming to improve the filtration and antifouling performance of CNCs/CDA blending membrane. The effects of CNCs on membrane morphologies, hydrophilicity, permeability and antifouling property were investigated. Results showed that the incorporation of CNCs into CDA membrane could effectively enhance the permeability and antifouling property of CNCs/CDA blending membrane by optimizing membrane microstructure and improving membrane hydrophilicity...
October 15, 2017: Carbohydrate Polymers
keyword
keyword
49496
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"