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https://www.readbyqxmd.com/read/28651205/understanding-size-dependent-properties-of-biocl-nanosheets-and-exploring-more-catalysis
#1
Benxia Li, Liangzhi Shao, Baoshan Zhang, Renshan Wang, Mei Zhu, Xiaowei Gu
Investigating the dependence of the catalysis on the size and structure of materials is of great significance for exploiting catalysts with characteristics of high activity, low cost, and new property. Non-precious metal catalysts bear high hope to meet the increasing demands of industrial applications in a cost-effective and environmentally friendly way. In this work, we take size-controlled BiOCl nanosheets as examples, which are synthesized via a hydrothermal method by changing the reaction conditions. The BiOCl nanosheets were characterized in details to understand their size-property relationships, and were found to exhibit a series of thickness-dependent physicochemical properties, including specific surface area, light absorption, and the separation efficiency of photo-generated charge carriers...
June 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28650788/comparison-of-the-antimicrobial-efficacy-of-the-endovac-system-and-conventional-needle-irrigation-in-primary-molar-root-canals
#2
Burak Buldur, Arife Kapdan
PURPOSE: The purpose of this study was to compare the antimicrobial efficacy of the EndoVac system and conventional needle irrigation to eliminate E faecalis in primary molar root canals. STUDY DESIGN: 60 extracted human primary second molar roots were instrumented up to an apical size .04/35 and randomly divided into two groups; Group 1: conventional needle (n=30) and Group 2: EndoVac (n=30), and four subgroups (two experimental subgroups; (a) 2.5% sodium hypochlorite (NaOCl) + ethylenediaminetetraacetic acid (EDTA) (n=20), (b) ozonated water (OW) + EDTA (n=20), and control groups (c) 5...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28648300/the-effects-of-2-3-dimercapto-1-propanesulfonic-acid-dmps-and-meso-2-3-dimercaptosuccinic-acid-dmsa-on-the-nephrotoxicity-in-the-mouse-during-repeated-cisplatin-cddp-treatments
#3
Y Yajima, M Kawaguchi, M Yoshikawa, M Okubo, E Tsukagoshi, K Sato, A Katakura
Previously, we reported that specific lower dose of sodium 2,3-dimercapto-1-propanesulfonic acid (DMPS) which is an antidote to heavy metal intoxication, inversely enhanced cisplatin (CDDP)-induced antitumor activity to S-180 cell-bearing mouse. This activity was only weak with meso-2,3-dimercaptosuccinic acid (DMSA), however. This study investigated the effects of lower doses of DMPS or DMSA on the nephrotoxicity and kinetics of CDDP. Kidney and blood isolated from female mice which received CDDP with or without DMPS or DMSA once daily for 4 days were provided for measuring levels of blood urea nitrogen (BUN) and transporter proteins (OCT2: organic cation transporter; MATE1: multidrug and toxin extrusion) mRNA, and CDDP-originated platinum, and TUNEL staining of renal tubular cells...
June 3, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28648075/synergistic-effects-of-gold-palladium-nanoalloys-and-reducible-supports-on-the-catalytic-reduction-of-4-nitrophenol
#4
Ndzondelelo Bingwa, Rapelang Patala, Jihyang Noh, Matumuene Joe Ndolomingo, Siyamthanda Tetyana, Semakaleng Bewana, Reinout Meijboom
Herein we report on the catalytic activity of mesoporous nickel, iron, cerium, cobalt and manganese oxides prepared using KIT-6 as a hard-template via evaporation assisted precipitation. The mesoporous metal oxides (MMOs) were characterized and used as heterogeneous catalysts in the reduction of 4-nitrophenol (4-Nip) by sodium borohydride (〖BH〗_4^-). Furthermore, polyamidoamide (PAMAM) dendrimers were used to synthesize Gold-Palladium nanoalloy particles. The size of AuPd/PAMAM was found to be 3.5 ± 0...
June 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28647919/role-of-sglt2-inhibitors-in-patients-with-diabetes-mellitus-and-heart-failure
#5
REVIEW
Frederik H Verbrugge
PURPOSE OF REVIEW: This review aims to summarize the evidence on cardiovascular risks and benefits of glucose-lowering drugs in diabetic patients, with a particular focus on the role of sodium-glucose transporter-2 (SGLT-2) inhibitors and their promising potential as a heart failure treatment. RECENT FINDINGS: The SGLT-2 inhibitor empagliflozin has emerged as the first glucose-lowering drug to lower cardiovascular mortality in diabetes with an unprecedented 38% relative risk reduction...
June 24, 2017: Current Heart Failure Reports
https://www.readbyqxmd.com/read/28645788/effects-of-acute-altered-gravity-during-parabolic-flight-and-or-vestibular-loss-on-cell-proliferation-in-the-rat-dentate-gyrus
#6
Yiwen Zheng, Catherine M Gliddon, Phillip Aitken, Lucy Stiles, Marie-Laure Machado, Bruno Philoxene, Pierre Denise, Paul F Smith, Stephane Besnard
Both parabolic flight, i.e. a condition of altered gravity, and loss of vestibular function, have been suggested to affect spatial learning and memory, which is known to be influenced by neurogenesis in the hippocampus. In this study we investigated whether short alternated micro- and hyper-gravity stimulations during parabolic flight and/or loss of vestibular function, would alter cell proliferation in the hippocampal dentate gyrus of rats, by measuring the number of bromodeoxyuridine (BrdU)-incorporated cells...
June 20, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28644401/the-investigation-of-electrochemistry-behaviors-of-tyrosinase-based-on-directly-electrodeposited-grapheneon-choline-gold-nanoparticles
#7
Yaping He, Xiaohui Yang, Quan Han, Jianbin Zheng
A novel catechol (CA) biosensor was developed by embedding tyrosinase (Tyr) onto in situ electrochemical reduction graphene (EGR) on choline-functionalized gold nanoparticle (AuNPs-Ch) film. The results of UV-Vis spectra indicated that Tyr retained its original structure in the film, and an electrochemical investigation of the biosensor showed a pair of well-defined, quasi-reversible redox peaks with Epa = -0.0744 V and Epc = -0.114 V (vs. SCE) in 0.1 M, pH 7.0 sodium phosphate-buffered saline at a scan rate of 100 mV/s...
June 23, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28643218/empagliflozin-improves-left-ventricular-diastolic-dysfunction-in-a-genetic-model-of-type-2-diabetes
#8
Nadjib Hammoudi, Dongtak Jeong, Rajvir Singh, Ahmed Farhat, Michel Komajda, Eric Mayoux, Roger Hajjar, Djamel Lebeche
PURPOSE: Cardiovascular (CV) diseases in type 2 diabetes (T2DM) represent an enormous burden with high mortality and morbidity. Sodium-glucose cotransporter 2 (SGLT2) inhibitors have recently emerged as a new antidiabetic class that improves glucose control, as well as body weight and blood pressure with no increased risk of hypoglycemia. The first CV outcome study terminated with empagliflozin, a specific SGLT2 inhibitor, has shown a reduction in CV mortality and in heart failure hospitalization, suggesting a beneficial impact on cardiac function which remains to be demonstrated...
June 22, 2017: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/28643098/-importance-of-wound-irrigation-solutions-and-fluids-with-antiseptic-effects-in-therapy-and-prophylaxis-update-2017
#9
REVIEW
Christian Willy, Catharina Scheuermann-Poley, Marcus Stichling, Thomas von Stein, Axel Kramer
INTRODUCTION: Despite the use of modern antibiotics as well as complex perioperative, intraoperative and postoperative prophylactic measures, the rate of surgical site infections (SSI) could not be significantly reduced. The introduction of biocompatible antiseptic drugs with a high microbiocidal effect provided a successful alternative for infection prevention and therapy, particularly in a time of increasing occurrence of multi-drug resistant pathogens. Hence, questions about the risk-benefit ratio of antiseptic wound irrigation solutions, the prophylactic use of wound irrigation solutions for the reduction of SSI and the effect of negative pressure wound therapy combined with instillation (NPWTi) need to be answered...
June 22, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28642198/treatment-of-intestinal-fibrosis-in-experimental-inflammatory-bowel-disease-by-the-pleiotropic-actions-of-a-local-rho-kinase-inhibitor
#10
Tom Holvoet, Sarah Devriese, Karolien Castermans, Sandro Boland, Dirk Leysen, Yves-Paul Vandewynckel, Lindsey Devisscher, Lien Van den Bossche, Sophie Van Welden, Melissa Dullaers, Roosmarijn E Vandenbroucke, Riet De Rycke, Karel Geboes, Arnaud Bourin, Olivier Defert, Pieter Hindryckx, Martine De Vos, Debby Laukens
BACKGROUND: Intestinal fibrosis resulting in (sub)obstruction is a common complication of Crohn's disease (CD). Rho kinases (ROCKs) play multiple roles in TGFβ1-induced myofibroblast activation that could be therapeutic targets. Because systemic ROCK inhibition causes cardiovascular side-effects, we evaluated the effects of a locally acting ROCK inhibitor (AMA0825) on intestinal fibrosis. METHODS: Fibrosis was assessed in mouse models using dextran sulfate sodium and adoptive T cell transfer...
June 19, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28639362/the-effect-of-hospital-biocide-sodium-dichloroisocyanurate-on-the-viability-and-properties-of-clostridium-difficile-spores
#11
Lovleen Tina Joshi, Angelina Welsch, Jennifer Hawkins, Les Baillie
Clostridium difficile is the primary cause of healthcare associated diarrhoea globally and produces spores which are resistant to commonly used biocides and are able persist on contaminated surfaces for months. This study examined the effect of sublethal concentrations of the biocide sodium dichloroisocyanurate (NaDCC) on the viability of spores produced by 21 clinical isolates of C. difficile representing a range of PCR ribotypes. Spores exposed to 500 ppm NaDCC for 10 minutes exhibited between a 4 - 6 log10 reduction in viability which was independent of spore PCR ribotype...
June 22, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28636313/iodine-iii-reagents-in-radical-chemistry
#12
Xi Wang, Armido Studer
The chemistry of hypervalent iodine(III) compounds has gained great interest over the past 30 years. Hypervalent iodine(III) compounds show valuable ionic reactivity due to their high electrophilicity but also express radical reactivity as single electron oxidants for carbon and heteroatom radical generation. Looking at ionic chemistry, these iodine(III) reagents can act as electrophiles to efficiently construct C-CF3, X-CF3 (X = heteroatom), C-Rf (Rf = perfluoroalkyl), X-Rf, C-N3, C-CN, S-CN, and C-X bonds...
June 21, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28635997/a-spin-column-free-approach-to-sodium-hydroxide-based-glycan-permethylation
#13
Yueming Hu, Chad R Borges
Glycan permethylation was introduced as a tool to facilitate the study of glycans in 1903. Since that time, permethylation procedures have been continually modified to improve permethylation efficiency and qualitative applicability. Typically, however, either laborious preparation steps or cumbersome and uneconomical spin columns have been needed to obtain decent permethylation yields on small glycan samples. Here we describe a spin column-free (SCF) glycan permethylation procedure that is applicable to both O- and N-linked glycans and can be employed upstream to intact glycan analysis by MALDI-MS, ESI-MS, or glycan linkage analysis by GC-MS...
June 21, 2017: Analyst
https://www.readbyqxmd.com/read/28635124/regular-aerobic-exercise-reduces-endothelin-1-mediated-vasoconstrictor-tone-in-overweight-and-obese-adults
#14
Caitlin A Dow, Brian L Stauffer, Danielle L Brunjes, Jared J Greiner, Christopher A DeSouza
Endothelin (ET)-1-mediated vasoconstrictor tone is elevated in overweight and obese adults, contributing to vasomotor dysfunction and increased cardiovascular disease risk. While the effects of habitual aerobic exercise on endothelium-dependent vasodilation in overweight/obese adults has been studied, little is known regarding ET-1 vasoconstriction. Accordingly, the aims of the present study were to determine: (1) if regular aerobic exercise training reduces ET-1-mediated vasoconstrictor tone in overweight and obese adults; and, if so (2) whether the reduction in ET-1 vasoconstriction contributes to exercise-induced improvement in endothelium-dependent vasodilation in this population...
June 20, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28634079/relaxin-reduces-susceptibility-to-post-infarct-atrial-fibrillation-in-mice-due-to-anti-fibrotic-and-anti-inflammatory-properties
#15
Thomas Beiert, Vedat Tiyerili, Vincent Knappe, Verena Effelsberg, Markus Linhart, Florian Stöckigt, Sabine Klein, Robert Schierwagen, Jonel Trebicka, Georg Nickenig, Jan W Schrickel, René P Andrié
BACKGROUND: Relaxin-2 (RLX) is a peptide hormone that exerts beneficial anti-fibrotic and anti-inflammatory effects in diverse models of cardiovascular disease. The goal of this study was to determine the effects of RLX treatment on the susceptibility to atrial fibrillation (AF) after myocardial infarction (MI). METHODS: Mice with cryoinfarction of the left anterior ventricular wall were treated for two weeks with either RLX (75 μg/kg/d) or vehicle (sodium acetate) delivered via subcutaneously implanted osmotic minipumps...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28633052/disinfection-efficiencies-of-sage-and-spearmint-essential-oils-against-planktonic-and-biofilm-staphylococcus-aureus-cells-in-comparison-with-sodium-hypochlorite
#16
Dimitrios Vetas, Eleni Dimitropoulou, Gregoria Mitropoulou, Yiannis Kourkoutas, Efstathios Giaouris
Staphylococcus aureus causes human infections and foodborne intoxications. This study explored the potential antibacterial actions of sage and spearmint essential oils (EOs) against both its planktonic and biofilm cells, in comparison with sodium hypochlorite (NaOCl), a commonly applied chemical sanitizer. Initially, the minimum inhibitory and bactericidal concentrations (MICs, MBCs) of each plant mixture were determined against planktonic cultures, following growth at 30°C for 24h. Stationary phase planktonic bacteria were then individually exposed for 6min to either each EO (applied at 1-2×MBC; 2...
June 8, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28632318/-the-easier-the-better-preparation-of-efficient-photocatalysts-metastable-poly-heptazine-imide-salts
#17
Zupeng Chen, Aleksandr Savateev, Sergey Pronkin, Vasiliki Papaefthimiou, Christian Wolff, Marc Georg Willinger, Elena Willinger, Dieter Neher, Markus Antonietti, Dariya Dontsova
Cost-efficient, visible-light-driven hydrogen production from water is an attractive potential source of clean, sustainable fuel. Here, it is shown that thermal solid state reactions of traditional carbon nitride precursors (cyanamide, melamine) with NaCl, KCl, or CsCl are a cheap and straightforward way to prepare poly(heptazine imide) alkali metal salts, whose thermodynamic stability decreases upon the increase of the metal atom size. The chemical structure of the prepared salts is confirmed by the results of X-ray photoelectron and infrared spectroscopies, powder X-ray diffraction and electron microscopy studies, and, in the case of sodium poly(heptazine imide), additionally by atomic pair distribution function analysis and 2D powder X-ray diffraction pattern simulations...
June 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28631933/a-salt-reduction-smartphone-app-supports-lower-salt-food-purchases-for-people-with-cardiovascular-disease-findings-from-the-saltswitch-randomised-controlled-trial
#18
Helen Eyles, Rebecca McLean, Bruce Neal, Yannan Jiang, Robert N Doughty, Rachael McLean, Cliona Ni Mhurchu
Background SaltSwitch is an innovative smartphone application (app) that enables shoppers to scan the barcode of a packaged food and receive an immediate, interpretive, traffic light nutrition label on the screen, along with suggestions for lower salt alternatives. Our aim was to determine the effectiveness of SaltSwitch to support people with cardiovascular disease to make lower salt food choices. Design Six-week, two-arm, parallel, randomised controlled trial in Auckland, New Zealand (2 weeks baseline and 4 weeks intervention)...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28631818/inactivation-of-bacillus-cereus-spores-on-red-chili-peppers-using-a-combined-treatment-of-aqueous-chlorine-dioxide-and-hot-air-drying
#19
Songyi Kim, Huyong Lee, Jee-Hoon Ryu, Hoikyung Kim
The effect of a combined treatment using aqueous chlorine dioxide (ClO2 ) and hot-air drying to inactivate Bacillus cereus spores on red chili peppers was evaluated. Ten washed and dried pepper samples, each comprising half of a single pepper (Capsicum annuum L.), were inoculated with B. cereus spore suspension. The inoculated samples were washed with sodium hypochlorite (NaOCl; 50, 100, or 200 μg/mL) or ClO2 (50, 100, or 200 μg/mL) solution for 1 min and then air-dried (25 ± 1 °C, 47 ± 1% relative humidity), which was followed by drying with hot air at 55 °C for up to 48 h...
June 20, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28631792/nanoscopic-dynamics-of-bicontinous-microemulsions-effect-of-membrane-associated-protein
#20
V K Sharma, Douglas G Hayes, Volker S Urban, Hugh M O'Neill, M Tyagi, E Mamontov
Bicontinous microemulsions (BμE) generally consist of nanodomains formed by surfactant in a mixture of water and oil at nearly equal proportions and are potential candidates for the solubilization and purification of membrane proteins. Here we present the first time report of nanoscopic dynamics of surfactant monolayers within BμEs formed by the anionic surfactant sodium dodecyl sulfate (SDS) measured on the nanosecond to picosecond time scale using quasielastic neutron scattering (QENS). BμEs investigated herein consisted of middle phases isolated from Winsor-III microemulsion systems that were formed by mixing aqueous and oil solutions under optimal conditions...
June 20, 2017: Soft Matter
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