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https://www.readbyqxmd.com/read/29220159/monolithic-nanoporous-in-sn-alloy-for-electrochemical-reduction-of-carbon-dioxide
#1
Wan Jae Dong, Chul Jong Yoo, Jong-Lam Lee
Nanostructured metal catalysts to convert CO2 to formate, which have been extensively studied over decades, have many problems such as durability, lifetime, high process temperature, and difficulty in controlling the morphology of nanostructures. Here, we report a facile method to fabricate monolithic nanoporous In-Sn alloy, a network of nanopores, induced by electroreduction of indium tin oxide nanobranches (ITO BRs). The electroreduction process concentrated a local electric field at the tip of the nanostructure, leading to current-assisted joule-heating to form a nanoporous In-Sn alloy...
December 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29217881/reduced-baroreflex-sensitivity-decreased-heart-rate-variability-with-increased-arterial-stiffness-in-predialysis
#2
C Lal, M Kaur, A K Jaryal, K K Deepak, D Bhowmik, S K Agarwal
High cardiovascular morbidity and mortality is observed in predialytic chronic kidney disease (CKD) patients. The underlying mechanism of cardiovascular dysfunction often remains unclear. The present study was designed to perform multiparametric assessment of baroreflex sensitivity (BRS), arterial stiffness indices, and cardiovascular variabilities (heart rate variability [HRV] and blood pressure variability [BPV]) together in predialytic CKD patients; compare it with normal healthy controls; and determine their relationships in predialytic nondiabetic CKD patients...
November 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/29216999/characteristics-predictors-and-mechanisms-of-thrombosis-in%C3%A2-coronary-bioresorbable-scaffolds-differences-between-early-and-late-events
#3
Tommaso Gori, Melissa Weissner, Svenja Gönner, Franziska Wendling, Helen Ullrich, Stephen Ellis, Remzi Anadol, Alberto Polimeni, Thomas Münzel
OBJECTIVES: The study sought to investigate the incidence, characteristics, predictors, and possible mechanisms of early and 3-year coronary scaffold thrombosis (ScT). BACKGROUND: An increased incidence of both early and late ScT has been shown in randomized trials. METHODS: Consecutive patients were enrolled in a single-center registry. Quantitative coronary angiography was performed. Incidence and predictors of ScT were assessed with Kaplan-Meier and Cox regression analyses...
December 11, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29216997/the-state-of-the-absorb-bioresorbable%C3%A2-scaffold-consensus-from-an-expert-panel
#4
REVIEW
Sripal Bangalore, Hiram G Bezerra, David G Rizik, Ehrin J Armstrong, Bruce Samuels, Srihari S Naidu, Cindy L Grines, Malcolm T Foster, James W Choi, Barry D Bertolet, Atman P Shah, Rebecca Torguson, Surendra B Avula, John C Wang, James P Zidar, Aziz Maksoud, Arun Kalyanasundaram, Steven J Yakubov, Bassem M Chehab, Anthony J Spaedy, Srini P Potluri, Ronald P Caputo, Ashok Kondur, Robert F Merritt, Amir Kaki, Ramon Quesada, Manish A Parikh, Catalin Toma, Fadi Matar, Joseph DeGregorio, William Nicholson, Wayne Batchelor, Raghava Gollapudi, Ethan Korngold, Riyaz Sumar, George S Chrysant, Jun Li, John B Gordon, Rajesh M Dave, Guilherme F Attizzani, Tom P Stys, Osvaldo S Gigliotti, Bruce E Murphy, Stephen G Ellis, Ron Waksman
Significant progress has been made in the percutaneous coronary intervention technique from the days of balloon angioplasty to modern-day metallic drug-eluting stents (DES). Although metallic stents solve a temporary problem of acute recoil following balloon angioplasty, they leave behind a permanent problem implicated in very late events (in addition to neoatherosclerosis). BRS were developed as a potential solution to this permanent problem, but the promise of these devices has been tempered by clinical trials showing increased risk of safety outcomes, both early and late...
December 11, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29215737/nitric-oxide-as-a-signaling-molecule-in-brassinosteroid-mediated-virus-resistance-to-cucumber-mosaic-virus-in-arabidopsis-thaliana
#5
Li-Juan Zou, Xing-Guang Deng, Li-E Zhang, Tong Zhu, Wen-Rong Tan, Arfan Muhammad, Li-Jun Zhu, Chao Zhang, Da-Wei Zhang, Hong-Hui Lin
Brassinosteroids (BRs) are growth-promoting plant hormones that play a crucial role in biotic stress responses. Here, we found that BR treatment increased nitric oxide (NO) accumulation, and a significant reduction of virus accumulation in Arabidopsis thaliana. However, the plants pre-treated with NO scavenger (PTIO) or nitrate reductase (NR) inhibitor (tungstate) were hardly generated NO generation and appeared to have the highest viral replication and suffer more damages. Furthermore, the antioxidant system and photosystem parameters were up-regulated in brassinolide (BL) - treated plants but down regulated in PTIO- or tungstate-treated plants, suggesting NO may be involved in BRs induced virus resistance in Arabidopsis...
December 7, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29215730/non-enzymatic-antioxidant-accumulations-in-br-deficient-and-br-insensitive-barley-mutants-under-control-and-drought-conditions
#6
Damian Gruszka, Anna Janeczko, Michal Dziurka, Ewa Pociecha, Jozsef Fodor
Drought is one of the most adverse stresses that affect plant growth and yield. Disturbances in metabolic activity resulting from drought cause overproduction of reactive oxygen species (ROS). It is postulated that brassinosteroids (BRs) regulate plant tolerance to the stress conditions, but the underlying mechanisms remain largely unknown. An involvement of endogenous BRs in regulation of the antioxidant homeostasis is not fully clarified either. Therefore, the aim of this study was to elucidate the role of endogenous BRs in regulation of non-enzymatic antioxidants in barley (Hordeum vulgare) under control and drought conditions...
December 7, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29213314/field-grown-mir156-transgenic-switchgrass-reproduction-yield-global-gene-expression-analysis-and-bioconfinement
#7
Chelsea R Johnson, Reginald J Millwood, Yuhong Tang, Jiqing Gou, Robert W Sykes, Geoffrey B Turner, Mark F Davis, Yi Sang, Zeng-Yu Wang, C Neal Stewart
Background: Genetic engineering has been effective in altering cell walls for biofuel production in the bioenergy crop, switchgrass (Panicum virgatum). However, regulatory issues arising from gene flow may prevent commercialization of engineered switchgrass in the eastern United States where the species is native. Depending on its expression level, microRNA156 (miR156) can reduce, delay, or eliminate flowering, which may serve to decrease transgene flow. In this unique field study of transgenic switchgrass that was permitted to flower, two low (T14 and T35) and two medium (T27 and T37) miR156-overexpressing 'Alamo' lines with the transgene under the control of the constitutive maize (Zea mays) ubiquitin 1 promoter, along with nontransgenic control plants, were grown in eastern Tennessee over two seasons...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29209339/overexpression-of-socyp85a1-a-spinach-cytochrome-p450-gene-in-transgenic-tobacco-enhances-root-development-and-drought-stress-tolerance
#8
Fangmeng Duan, Jun Ding, Dongsun Lee, Xueli Lu, Yuqi Feng, Wenwen Song
Brassinosteroids (BRs) play an essential role in plant growth, development, and responses to diverse abiotic stresses. However, previous studies mainly analyzed how exogenous BRs influenced plant physiological reactions to drought stress, therefore, genetic evidences for the endogenous BRs-mediated regulation of plant responses still remain elusive. In this study, a key BRs biosynthetic gene, SoCYP85A1 was cloned from Spinacia oleracea, which has a complete open reading frame of 1,392 bp encoding a 464 amino acid peptide and shares high sequence similarities with CYP85A1 from other plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29206785/three-weeks-of-overload-training-increases-resting-muscle-sympathetic-activity
#9
Alexandra M Coates, Anthony V Incognito, Jeremy D Seed, Connor J Doherty, Philip J Millar, Jamie F Burr
PURPOSE: Overload training is hypothesized to alter autonomic regulation, though interpretations using indirect measures of heart rate variability are conflicting. The aim of the present study was to examine the effects of overload training on muscle sympathetic nerve activity (MSNA), a direct measure of central sympathetic outflow, in recreational endurance athletes. METHODS: Measurements of heart rate variability, cardiac baroreflex sensitivity (BRS), MSNA (microneurography), and sympathetic BRS were obtained in seventeen healthy triathletes and cyclists after 1-week of reduced training (baseline) and following 3-weeks of either regular (CON, n=7) or overload (OL, n=10) training...
December 2, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29204077/a-functional-genomic-perspective-on-drought-signalling-and-its-crosstalk-with-phytohormone-mediated-signalling-pathways-in-plants
#10
REVIEW
Shalini Tiwari, Charu Lata, Puneet Singh Chauhan, Vivek Prasad, Manoj Prasad
Introduction: Drought stress is one of the most important abiotic stresses that negatively influence crop performance and productivity. Plants acclimatize to drought stress conditions through altered molecular, biochemical and physiological responses. Gene and/or protein expression and regulation are thought to be modulated upon stress perception and signal transduction for providing requisite endurance to plants.Plant growth regulators or phytohormones are important molecules required for various biological processes in plants and are also central to stress signalling pathways...
December 2017: Current Genomics
https://www.readbyqxmd.com/read/29202755/h558r-a-common-scn5a-polymorphism-modifies-the-clinical-phenotype-of-brugada-syndrome-by-modulating-dna-methylation-of-scn5a-promoters
#11
Hiroya Matsumura, Yukiko Nakano, Hidenori Ochi, Yuko Onohara, Akinori Sairaku, Takehito Tokuyama, Shunsuke Tomomori, Chikaaki Motoda, Michitaka Amioka, Naoya Hironobe, Masaaki Toshishige, Shinya Takahashi, Katsuhiko Imai, Taijiro Sueda, Kazuaki Chayama, Yasuki Kihara
BACKGROUND: A common SCN5A polymorphism H558R (c.1673 A > G, rs1805124) improves sodium channel activity in mutated channels and known to be a genetic modifier of Brugada syndrome patients (BrS). We investigated clinical manifestations and underlying mechanisms of H558R in BrS. METHODS AND RESULTS: We genotyped H558R in 100 BrS (mean age 45 ± 14 years; 91 men) and 1875 controls (mean age 54 ± 18 years; 1546 men). We compared clinical parameters in BrS with and without H558R (H558R+ vs...
December 4, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29180481/validity-and-variability-of-xbrs-instantaneous-cardiac-baroreflex-sensitivity
#12
Karel H Wesseling, John M Karemaker, Paolo Castiglioni, Emil Toader, Andrei Cividjian, Jos J Settels, Luc Quintin, Berend E Westerhof
Spontaneous oscillations of blood pressure (BP) and interbeat interval (IBI) may reveal important information on the underlying baroreflex control and regulation of BP We evaluated the method of continuously measured instantaneous baroreflex sensitivity by cross correlation (xBRS) validating its mean value against the gold standard of phenylephrine (Phe) and nitroprusside (SNP) bolus injections, and focusing on its spontaneous changes quantified as variability around the mean. For this purpose, we analyzed data from an earlier study of eight healthy males (aged 25-46 years) who had received Phe and SNP in conditions of baseline and autonomic blocking agents: atropine, propranolol, and clonidine...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29180267/cardiac-arrest-and-brugada-syndrome-is-drug-induced-type-1-ecg-pattern-always-a-marker-of-low-risk
#13
Pietro Delise, Giuseppe Allocca, Nadir Sitta, Federico Migliore, Federica Dagradi, Carla Spazzolini, Luigi Sciarra, Valeria Carinci, Domenico Corrado, Leonardo Calò, Peter J Schwartz
BACKGROUND: Patients diagnosed as affected by Brugada syndrome (BrS) on the basis of a drug-induced type 1 ECG pattern (type1) are regarded as at low risk for cardiac arrest. We tested whether this assumption matches reality. METHODS: The study population included 26 patients from our group and 217 patients from three studies published between 2002 and 2013, all of them with aborted cardiac arrest (ACA) and in whom a previously unrecognized type1 (spontaneous or drug-induced) was discovered after the event, thus leading to the diagnosis of BrS...
November 16, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29174878/utility-of-fractional-anisotropy-in-cerebral-peduncle-for-stroke-outcome-prediction-comparison-of-hemorrhagic-and-ischemic-strokes
#14
Tetsuo Koyama, Masatoshi Koumo, Yuki Uchiyama, Kazuhisa Domen
BACKGROUND: Diffusion-tensor fractional anisotropy (FA) has been used for predicting stroke outcome. However, most previous studies focused on patients with either hemorrhagic or ischemic stroke. The aim of this study was to assess the correlation between FA and outcome for patients with hemorrhagic stroke and those with ischemic stroke, and then compare their correlation patterns. METHODS: This study sampled 40 hemorrhagic and 40 ischemic stroke patients from our previously published reports...
November 23, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29174242/bioresorbable-scaffold-fourth-revolution-or-failed-revolution-is-low-scaffold-strut-thickness-the-wrong-target
#15
EDITORIAL
Sundeep Mishra
Bioresorbable scaffold (BRS) technology has currently fallen into disrepute because of inordinately high risk of scaffold thrombosis and post-procedure myocardial infarction. Low tensile and radial strengths of polymeric BRS contributing to improper strut embedment have been identified as major correlates of poor outcomes following BRS implantation. Magnesium has a better tensile/radial strength compared with polymeric BRS but it is still far lower than cobalt-chromium. Newers innovations utilizing alteration in polymer composition and orientation or even newer polymers have focused on attempts to reduce strut thickness but may have little effect on tensile/radial strength of finished product and therefore may not impact the BRS outcome on long run...
November 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/29172153/ajmaline-blocks-ina-and-ikr-without-eliciting-differences-between-brugada-syndrome-patient-and-control-human-pluripotent-stem-cell-derived-cardiac-clusters
#16
Duncan C Miller, Stephen C Harmer, Ariel Poliandri, Muriel Nobles, Elizabeth C Edwards, James S Ware, Tyson V Sharp, Tristan R McKay, Leo Dunkel, Pier D Lambiase, Andrew Tinker
The class Ia anti-arrhythmic drug ajmaline is used clinically to unmask latent type I ECG in Brugada syndrome (BrS) patients, although its mode of action is poorly characterised. Our aims were to identify ajmaline's mode of action in human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes (CMs), and establish a simple BrS hiPSC platform to test whether differences in ajmaline response could be determined between BrS patients and controls. Control hiPSCs were differentiated into spontaneously contracting cardiac clusters...
November 7, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29171214/bioresorbable-vascular-scaffold-korean-expert-panel-report
#17
REVIEW
Jung Min Ahn, Duk Woo Park, Sung Jin Hong, Young Keun Ahn, Joo Yong Hahn, Won Jang Kim, Soon Jun Hong, Chang Wook Nam, Do Yoon Kang, Seung Yul Lee, Woo Jung Chun, Jung Ho Heo, Deok Kyu Cho, Jin Won Kim, Sung Ho Her, Sang Wook Kim, Sang Yong Yoo, Myeong Ki Hong, Seung Jea Tahk, Kee Sik Kim, Moo Hyun Kim, Yangsoo Jang, Seung Jung Park
Bioresorbable vascular scaffold (BRS) is an innovative device that provides structural support and drug release to prevent early recoil or restenosis, and then degrades into nontoxic compounds to avoid late complications related with metallic drug-eluting stents (DESs). BRS has several putative advantages. However, recent randomized trials and registry studies raised clinical concerns about the safety and efficacy of first generation BRS. In addition, the general guidance for the optimal practice with BRS has not been suggested due to limited long-term clinical data in Korea...
November 6, 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/29168517/crossed-beam-polyatomic-reaction-dynamics-recent-advances-and-new-insights
#18
REVIEW
Huilin Pan, Kopin Liu, Adriana Caracciolo, Piergiorgio Casavecchia
Over the past ten years or so, great advances in our understanding of the dynamics of elementary (bimolecular) polyatomic reactions in the gas-phase have occurred. This has been made possible by critical improvements (a) in crossed molecular beam (CMB) instruments with rotating mass spectrometric detection and time-of-flight analysis, especially following the implementation of soft ionization (by tunable low energy electrons or vacuum-ultraviolet synchrotron radiation) for product detection with increased sensitivity and universal detection power, and (b) in REMPI-slice velocity map ion imaging (VMI) detection techniques in pulsed CMB experiments for obtaining product pair-correlated information through high-resolution measurements directly in the center of mass system...
November 23, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/29167119/revisiting-the-physiological-effects-of-exercise-training-on-autonomic-regulation-and-chemoreflex-control-in-heart-failure-does-ejection-fraction-matter
#19
David Cristobal Andrade, Alexis Arce-Alvarez, Camilo Toledo, Hugo S Diaz, Claudia Lucero, Rodrigo Quintanilla, Harold D Schultz, Noah J Marcus, Markus Amman, Rodrigo Del Rio
Heart failure (HF) is a global public health problem that, independent of its etiology (reduced (HFrEF) or preserved ejection fraction (HFpEF)), is characterized by functional impairments of cardiac function, chemoreflex hypersensitivity, baroreflex sensitivity (BRS) impairment, and abnormal autonomic regulation, all of which contribute to increased morbidity and mortality. Exercise training (ExT) has been identified as a nonpharmacological therapy capable of restoring normal autonomic function and improving survival in patients with HFrEF...
November 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29165170/evaluating-prevalence-and-risk-factors-of-building-related-symptoms-among-office-workers-seasonal-characteristics-of-symptoms-and-psychosocial-and-physical-environmental-factors
#20
Kenichi Azuma, Koichi Ikeda, Naoki Kagi, U Yanagi, Haruki Osawa
BACKGROUND: Psychosocial and environmental factors at the workplace play a significant role in building-related symptoms (BRSs). Environmental factors change during summer cooling and winter heating using air-conditioning systems. Thus, significant risk factors in each season need to be clarified. METHODS: A nationwide cross-sectional study was conducted during summer in Japan and seasonal differences between summer and winter were evaluated. Self-administered questionnaires were distributed to 489 offices...
April 12, 2017: Environmental Health and Preventive Medicine
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