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https://www.readbyqxmd.com/read/28342758/effects-of-low-frequency-ultrasound-on-heterogenous-deacetylation-of-chitin
#1
Ngo Thi Hoai Duong, Ngo Dang Nghia
The effects of low frequency ultrasound to the heterogeneous deacetylation of chitin from the shell of white shrimp (Penaeus vannamei) were examined. The deacetylation process was carried out in the range of NaOH concentrations from 35% to 65% (w/w) with and without the ultrasound in the frequency of 37kHz, RMS=300W. The chitosan obtained was characterized in the degree of deacetylation, solubility, FT-IR and X-ray diffraction. The results showed that the behaviors of the deacetylation in two cases, with and without ultrasound, were similar but the ultrasound enhanced the deacetylation rate and therefore reduced the time of the reaction to get the same degree of deacetylation...
March 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28342598/effect-of-undigested-neutral-detergent-fiber-content-of-alfalfa-hay-on-lactating-dairy-cows-feeding-behavior-fiber-digestibility-and-lactation-performance
#2
M Fustini, A Palmonari, G Canestrari, E Bonfante, L Mammi, M T Pacchioli, G C J Sniffen, R J Grant, K W Cotanch, A Formigoni
The objective of this study was to investigate the effects of 2 alfalfa hays differing in undigested neutral detergent fiber content and digestibility used as the main forage source in diets fed to high producing cows for Parmigiano-Reggiano cheese production. Diets were designed to have 2 different amounts of undigestible NDF [high (Hu) and low (Lu)], as determined by 240-h in vitro analysis (uNDF240). Alfalfa hay in vitro digestibility [% of amylase- and sodium sulfite-treated NDF with ash correction (aNDFom)] at 24 and 240 h was 40...
March 22, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28340239/hypertension-in-dialysis-patients-a-consensus-document-by-the-european-renal-and-cardiovascular-medicine-eureca-m-working-group-of-the-european-renal-association-european-dialysis-and-transplant-association-era-edta-and-the-hypertension-and-the-kidney-working
#3
Pantelis A Sarafidis, Alexandre Persu, Rajiv Agarwal, Michel Burnier, Peter de Leeuw, Charles J Ferro, Jean-Michel Halimi, Gunnar H Heine, Michel Jadoul, Faical Jarraya, Mehmet Kanbay, Francesca Mallamaci, Patrick B Mark, Alberto Ortiz, Gianfranco Parati, Roberto Pontremoli, Patrick Rossignol, Luis Ruilope, Patricia Van der Niepen, Raymond Vanholder, Marianne C Verhaar, Andrzej Wiecek, Gregoire Wuerzner, Gérard M London, Carmine Zoccali
In patients with end-stage renal disease (ESRD) treated with haemodialysis or peritoneal dialysis, hypertension is common and often poorly controlled. Blood pressure (BP) recordings obtained before or after haemodialysis display a J- or U-shaped association with cardiovascular events and survival, but this most likely reflects the low accuracy of these measurements and the peculiar haemodynamic setting related to dialysis treatment. Elevated BP detected by home or ambulatory BP monitoring is clearly associated with shorter survival...
March 13, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339658/acute-cell-volume-regulation-by-janus-kinase-2-mediated-sodium-hydrogen-exchange-activation-develops-at-the-late-one-cell-stage-in-mouse-preimplantation-embryos%C3%A2
#4
Baozeng Xu, Chenxi Zhou, Megan Meredith, Jay M Baltz
Early preimplantation embryos are extremely sensitive to dysregulation of cell volume, which can lead to developmental arrest. It was previously shown that mouse embryos at the two-cell stage respond to a cell volume decrease by quickly activating Na+/H+ exchange via a signaling mechanism that involves the tyrosine kinase Janus kinase 2 (JAK2). However, it was not known whether this mechanism is active at the one-cell stage, when embryos are most sensitive to perturbed cell volume. Na+/H+ exchanger activity elicited by an induced cell volume decrease was significantly lower at the mid one-cell stage than at the late one-cell stage or during the two-cell stage...
February 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28339010/effects-of-different-cellulose-membranes-regenerated-from-styela-clava-tunics-on-wound-healing
#5
Sung Hwa Song, Keum Yong Seong, Ji Eun Kim, Jun Go, Eun Kyoung Koh, Ji Eun Sung, Hong Joo Son, Young Jin Jung, Hye Sung Kim, Jin Tae Hong, Dae Youn Hwang
The aim of this study was to investigate the therapeutic effects of three different cellulose membranes (CMs) manufactured from Styela clava tunics (SCTs) on the healing of cutaneous wounds. We examined the physical properties and therapeutic effects of three CMs regenerated from SCTs (referred to as SCT‑ CMs), including normal CM (SCT‑CM), freeze-dried SCT‑CM (FSCT‑CM) and sodium alginate-supplemented SCT‑CM (ASCT‑CM) on skin regeneration and angiogenesis using Sprague-Dawley (SD) rats. FSCT‑CM exhibited an outstanding interlayered structure, a high tensile strength (1...
March 20, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28338762/redox-and-reactive-oxygen-species-network-in-acclimation-for-salinity-tolerance-in-sugar-beet
#6
M Sazzad Hossain, Abdelaleim Ismail ElSayed, Marten Moore, Karl-Josef Dietz
Fine-tuned and coordinated regulation of transport, metabolism and redox homeostasis allows plants to acclimate to osmotic and ionic stress caused by high salinity. Sugar beet is a highly salt tolerant crop plant and is therefore an interesting model to study sodium chloride (NaCl) acclimation in crops. Sugar beet plants were subjected to a final level of 300 mM NaCl for up to 14 d in hydroponics. Plants acclimated to NaCl stress by maintaining its growth rate and adjusting its cellular redox and reactive oxygen species (ROS) network...
February 18, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338314/surface-layer-evolution-on-graphite-during-electrochemical-sodium-tetraglyme-co-intercalation
#7
Julia Maibach, Fabian Jeschull, Daniel Brandell, Kristina Edstrom, Mario Valvo
One obstacle in sodium ion batteries is the lack of suitable anode materials. As recently shown, the most common anode material of the state of the art lithium ion batteries, graphite, can be used for sodium ion storage as well, if ether-based electrolyte solvents are used. These solvents co-intercalate with the sodium ions leading to the highly reversible formation of ternary graphite intercalation compounds (t-GIC). In order for the solvent co-intercalation to work efficiently, it is expected that only a very thin surface layer forms during electrochemical cycling...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28338063/greater-postprandial-glucose-excursions-and-inadequate-nutrient-intake-in-youth-with-type-1-diabetes-and-celiac-disease
#8
Anna Pham-Short, Kim C Donaghue, Geoffrey Ambler, Sarah Garnett, Maria E Craig
The gluten free diet (GFD) has a high glycemic index and low-fiber content, which potentially influences glycemic excursions in type 1 diabetes (T1D) and celiac disease (CD). Participants in this case-control study of youth with T1D+CD (n = 10) and T1D only (n = 7) wore blinded continuous glucose monitoring systems for six days. Blood glucose levels (BGLs) were compared between groups for each meal, including pre-meal, peak, 2-hour postprandial and time-to-peak. Participants consumed a test-breakfast of GF cereal and milk for three days and kept weighed food diaries; nutrient intake was analyzed and compared to national recommendations...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337271/effects-of-long-term-low-and-high-dose-sodium-arsenite-exposure-in-human-transitional-cells
#9
Jianming He, Feng Wang, Fen Luo, Xuedan Chen, Xi Liang, Wenbin Jiang, Zhizhong Huang, Jiafan Lei, Fabo Shan, Xueqing Xu
Epidemiological studies have revealed the association between increased risk of bladder cancer and chronic arsenic exposure. Here, we explored biological effects of arsenic in T24. Microarray analysis was applied to analyze mRNA in T24 following 0, 2 or 5 μM sodium arsenite (As) exposure for 72 hours. Long term (up to 140 days) low-dose (200 nM) and high-dose (1,000 nM) As decreased E-cadherin protein level through different mechanisms because the mRNA levels of E-cadherin increased following low-dose As exposure but decreased following high-dose As exposure...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28335969/design-synthesis-and-application-of-a-new-class-of-stimuli-responsive-separation-materials
#10
Roshanak Sepehrifar, Reinhard I Boysen, Basil Danylec, Yuanzhong Yang, Kei Saito, Milton T W Hearn
A new class of efficient stationary phase has been investigated for use in the liquid chromatographic separation of low molecular weight analytes and high molecular weight biomolecules, based on the application of immobilised stimuli-responsive polymers (SRPs). To this end, two polymeric units, namely poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) and poly(acrylic acid) (PAA) were tethered to a triazine core. The derived poly(2-dimethyl-aminoethyl methacrylate)-block-poly(acrylic acid) (PDMAEMA-b-PAA), as a diblock co-polymer, was then immobilised onto the surface of porous silica particles...
April 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28334182/evaluation-of-different-applications-of-ethanedinitrile-c2n2-in-various-fumigation-chambers-for-control-of-monochamus-alternatus-coleoptera-cerambycidae-in-naturally-infested-logs
#11
Byung-Ho Lee, Chung-Gyoo Park, Yonglin Ren
Monochamus alternatus Hopeis is an important vector of nematode pests of timber in Korea, particularly Bursaphelenchus xylophilus (Steiner & Buhrer) Nickle. Previously, we reported that ethanedinitrile (C2N2) has the potential to replace methyl bromide and metam sodium to control M. alternatus larvae and B. xylophilus under low-temperature (<5 °C) conditions. Herein, we report on fumigation trials of C2N2 over a 3-yr period (February 2013-October 2015) conducted at higher temperatures. The trials were conducted under 24 different conditions that incorporated varying fumigation chamber types (plastic sheeting-enclosed chambers of differing construction or an ISO shipping container, interior size: 5...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28332871/sodium-glucose-cotransporter-2-and-dipeptidyl-peptidase-4-inhibition-promise-of-a-dynamic-duo
#12
Ildiko Lingvay
OBJECTIVE: This article reviews evidence supporting sodium glucose cotransporter 2 (SGLT2) inhibitor and dipeptidyl peptidase-4 (DPP-4) inhibitor combination therapy for management of type 2 diabetes mellitus (T2DM). METHODS: We conducted a non-systematic review of the literature focusing on single-pill or fixed-dose combinations of SGLT2 inhibitors and DPP-4 inhibitors available in the United States. RESULTS: SGLT2 inhibitors and DPP-4 inhibitors have complementary mechanisms of action that address several of the underlying pathophysiological abnormalities present in T2DM without overlapping toxicities...
March 23, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28332813/competitive-adsorption-of-polyelectrolytes-onto-and-into-pellicle-coated-hydroxyapatite-investigated-by-qcm-d-and-force-spectroscopy
#13
Hyun-Su Lee, Carl Myers, Lynette Zaidel, Prathima Chandra Nalam, Matthew Alexander Caporizzo, Carlo Daep, David M Eckmann, James G Masters, Russell J Composto
A current effort in preventive dentistry is to inhibit surface attachment of bacteria using antibacterial polymer coatings on the tooth surface. For the antibacterial coatings, the physisorption of anionic and cationic polymers directly onto hydroxyapatite (HA) and saliva treated HA surfaces was studied using quartz crystal microbalance, force spectroscopy and atomic force microscopy. First, single species adsorption is shown to be stronger on HA surfaces than on silicon oxide surfaces for all polymers (i.e...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28332359/burdens-of-cardiometabolic-diseases-attributable-to-dietary-and-metabolic-risks-in-korean-adults-2012-2013
#14
Yoonsu Cho, Frederick Cudhea, Ju Hyun Park, Dariush Mozaffarian, Gitanjali Singh, Min Jeong Shin
PURPOSE: In line with epidemiological and sociocultural changes in Korea over the past decades, reliable estimation of diseases as a result of dietary and metabolic risks is required. In this study, we aimed to evaluate the contributions of dietary and metabolic factors to cardiometabolic diseases (CMDs) in Korean adults (25-64 years old) during 2012-2013. MATERIALS AND METHODS: Distribution of risk factors and cause-specific mortality by gender and age per year was obtained from the Korea National Health and Nutrition Examination Survey and Statistics Korea, respectively...
May 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28331782/polyanion-type-electrode-materials-for-sodium-ion-batteries
#15
REVIEW
Qiao Ni, Ying Bai, Feng Wu, Chuan Wu
Sodium-ion batteries, representative members of the post-lithium-battery club, are very attractive and promising for large-scale energy storage applications. The increasing technological improvements in sodium-ion batteries (Na-ion batteries) are being driven by the demand for Na-based electrode materials that are resource-abundant, cost-effective, and long lasting. Polyanion-type compounds are among the most promising electrode materials for Na-ion batteries due to their stability, safety, and suitable operating voltages...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331293/risk-assessment-and-experimental-design-in-the-development-of-a-prolonged-release-drug-delivery-system-with-paliperidone
#16
Sonia Iurian, Luana Turdean, Ioan Tomuta
This study focuses on the development of a drug product based on a risk assessment-based approach, within the quality by design paradigm. A prolonged release system was proposed for paliperidone (Pal) delivery, containing Kollidon(®) SR as an insoluble matrix agent and hydroxypropyl cellulose, hydroxypropyl methylcellulose (HPMC), or sodium carboxymethyl cellulose as a hydrophilic polymer. The experimental part was preceded by the identification of potential sources of variability through Ishikawa diagrams, and failure mode and effects analysis was used to deliver the critical process parameters that were further optimized by design of experiments...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28331009/the-modulation-of-two-motor-behaviours-by-persistent-sodium-currents-in-xenopus-laevis-tadpoles
#17
Erik Svensson, Hugo Jeffreys, Wen-Chang Li
Persistent sodium currents (INaP) are common in neuronal circuitries and they have been implicated in several diseases like amyotrophic lateral sclerosis (ALS) and epilepsy. However, the role of INaP in the regulation of specific behaviours is still poorly understood. Here we have characterized INaP and investigated its role in the swimming and struggling behaviour of Xenopus tadpoles. INaP was identified in three groups of neurons, namely sensory Rohon-Beard neurons (RB neurons), descending interneurons (dINs), and non-dINs (neurons rhythmically active in swimming)...
March 22, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28330730/no-fat-no-sugar-no-salt-no-problem-prevalence-of-low-content-nutrient-claims-and-their-associations-with-the-nutritional-profile-of-food-and-beverage-purchases-in-the%C3%A2-united-states
#18
Lindsey Smith Taillie, Shu Wen Ng, Ya Xue, Emily Busey, Matthew Harding
BACKGROUND: Nutrient claims are a commonly used marketing tactic, but the association between claims and nutritional quality of products is unknown. The objective of this study was to examine trends in the proportion of packaged food and beverage purchases with a nutrient claim, whether claims are associated with improved nutritional profile, and whether the proportion of purchases with claims differs by race/ethnicity or socioeconomic status. METHODS: This cross-sectional study examined nutrient claims on more than 80 million food and beverage purchases from a transaction-level database of 40,000 US households from 2008 to 2012...
March 6, 2017: Journal of the Academy of Nutrition and Dietetics
https://www.readbyqxmd.com/read/28330645/design-of-fixed-dose-combination-and-physicochemical-characterization-of-enteric-coated-bilayer-tablet-with-circadian-rhythmic-variations-containing-telmisartan-and-pravastatin-sodium
#19
Daoqi Luo, Joo Hee Kim, Chulhun Park, Euichaul Oh, Jun Bum Park, Jing-Hao Cui, Qing-Ri Cao, Beom-Jin Lee
The aim of this study was to investigate a fixed dose combination (FDC) of telmisartan (TEL) and pravastatin sodium (PRA) in enteric-coated bilayer tablets, which was designed for once-daily bedtime dose in order to match circadian rhythmic variations of hypertension and cholesterol synthesis and optimize the patient friendly dosing treatment. Due to the poor aqueous solubility of TEL, a ternary solid dispersions (SD) consisting of TEL, polyethylene glycol 6000 (PEG 6000) and magnesium oxide (MgO) were designed to enhance its dissolution rate in intestinal fluid...
March 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28330216/potential-application-of-waste-from-castor-bean-ricinus-communis-l-for-production-for-xylanase-of-interest-in-the-industry
#20
Polyanna Nunes Herculano, Keila Aparecida Moreira, Raquel Pedrosa Bezerra, Tatiana Souza Porto, Cristina Maria de Souza-Motta, Ana Lúcia Figueiredo Porto
Xylanases activity (XY) from Aspergillus japonicus URM5620 produced by Solid-State Fermentation (SSF) of castor press cake (Ricinus communis) on different conditions of production and extraction by PEG/citrate aqueous two-phase system (ATPS) were investigated. XY production was influenced by substrate amount (5-10 g), initial moisture (15-35 %), pH (4.0-6.0) and temperature (25-35 °C), obtaining the maximum activity of 29,085 ± 1808 U g ds(-1) using 5.0 g of substrate with initial moisture of 15 % at 25 °C and pH 6...
December 2016: 3 Biotech
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