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https://www.readbyqxmd.com/read/28325748/halogenated-ether-alcohol-and-alkane-anesthetics-activate-task-3-tandem-pore-potassium-channels-likely-through-a-common-mechanism
#1
Anita Luethy, James D Boghosian, Rithu Srikantha, Joseph Cotten
TASK-3 (KCNK9) tandem pore potassium channel function is activated by halogenated anesthetics through binding at a putative anesthetic binding cavity. To understand pharmacological requirements for TASK-3 activation, we studied the concentration-response of TASK-3 to several anesthetics (isoflurane, desflurane, sevoflurane, halothane, α-chloralose, 2,2,2-trichloroethanol(TCE), and chloral hydrate), to ethanol, and to a panel of halogenated methanes and alcohols. We used mutagenesis to probe the anesthetic binding cavity as observed in a TASK-3 homology model...
March 21, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28291229/optimizing-ultrathin-ag-films-for-high-performance-oxide-metal-oxide-flexible-transparent-electrodes-through-surface-energy-modulation-and-template-stripping-procedures
#2
Xi Yang, Pingqi Gao, Zhenhai Yang, Juye Zhu, Feng Huang, Jichun Ye
Among new flexible transparent conductive electrode (TCE) candidates, ultrathin Ag film (UTAF) is attractive for its extremely low resistance and relatively high transparency. However, the performances of UTAF based TCEs critically depend on the threshold thickness for growth of continuous Ag films and the film morphologies. Here, we demonstrate that these two parameters could be strongly altered through the modulation of substrate surface energy. By minimizing the surface energy difference between the Ag film and substrate, a 9 nm UTAF with a sheet resistance down to 6...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28264061/wheat-straw-biochar-supported-nanoscale-zerovalent-iron-for-removal-of-trichloroethylene-from-groundwater
#3
Hui Li, Ya Qin Chen, Shuai Chen, Xiao Li Wang, Shu Guo, Yue Feng Qiu, Yong Di Liu, Xiao Li Duan, Yun Jiang Yu
This study synthesized the wheat straw biochar-supported nanoscale zerovalent iron (BC-nZVI) via in-situ reduction with NaBH4 and biochar pyrolyzed at 600°C. Wheat straw biochar, as a carrier, significantly enhanced the removal of trichloroethylene (TCE) by nZVI. The pseudo-first-order rate constant of TCE removal by BC-nZVI (1.079 h-1) within 260 min was 1.4 times higher and 539.5 times higher than that of biochar and nZVI, respectively. TCE was 79% dechlorinated by BC-nZVI within 15 h, but only 11% dechlorinated by unsupported nZVI, and no TCE dechlorination occurred with unmodified biochar...
2017: PloS One
https://www.readbyqxmd.com/read/28230207/enhanced-fenton-like-degradation-of-trichloroethylene-by-hydrogen-peroxide-activated-with-nanoscale-zero-valent-iron-loaded-on-biochar
#4
Jingchun Yan, Linbo Qian, Weiguo Gao, Yun Chen, Da Ouyang, Mengfang Chen
Composite of nanoscale Zero Valent Iron (nZVI) loaded on Biochar (BC) was prepared and characterized as hydrogen peroxide (H2O2) activator for the degradation of trichloroethylene (TCE). nZVI is homogeneously loaded on lamellarly structured BC surfaces to form nZVI/BC with specific surface area (SBET) of 184.91 m(2) g(-1), which can efficiently activate H2O2 to achieve TCE degradation efficiency of 98.9% with TOC removal of 78.2% within 30 min under the conditions of 0.10 mmol L(-1) TCE, 1.13 g L(-1) nZVI/BC and 1...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28228027/ab-initio-state-specific-n2-o-dissociation-and-exchange-modeling-for-molecular-simulations
#5
Han Luo, Marat Kulakhmetov, Alina Alexeenko
Quasi-classical trajectory (QCT) calculations are used in this work to calculate state-specific N2(X(1)Σ)+O((3)P)→2N((4)S)+O((3)P) dissociation and N2(X(1)Σ)+O((3)P)→NO(X(2)Π)+N((4)S) exchange cross sections and rates based on the 1(3)A″ and 1(3)A' ab initio potential energy surface by Gamallo et al. [J. Chem. Phys. 119, 2545-2556 (2003)]. The calculations consider translational energies up to 23 eV and temperatures between 1000 K and 20 000 K. Vibrational favoring is observed for dissociation reaction at the whole range of collision energies and for exchange reaction around the dissociation limit...
February 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28226295/effect-of-the-dedicated-education-unit-on-nursing-student-self-efficacy-a-quasi-experimental-research-study
#6
Lynn E George, Lisa W Locasto, Katrina A Pyo, Thomas W Cline
Although the Dedicated Education Unit (DEU) has shown initial promise related to satisfaction with the teaching/learning environment, few studies have examined student outcomes related to the use of the DEU as a clinical education model beyond student satisfaction. The purpose of this quantitative, quasi-experimental study was to compare student outcomes from the traditional clinical education (TCE) model with those from the DEU model. Participants were students enrolled in a four-year baccalaureate program in nursing (n = 193) who had clinical education activities in one of three clinical agencies...
February 16, 2017: Nurse Education in Practice
https://www.readbyqxmd.com/read/28224341/enhanced-transportability-of-zero-valent-iron-nanoparticles-in-aquifer-sediments-surface-modifications-reactivity-and-particle-traveling-distances
#7
Naresh Kumar, Jérôme Labille, Nathan Bossa, Mélanie Auffan, Pierre Doumenq, Jérôme Rose, Jean-Yves Bottero
In this study, we assessed the transportability of zero valent iron nanoparticles (nano-Fe(0)) coated with different organics (carboxy methyl cellulose (CMC), poly acrylic acid (PAA), and xanthan gum) in standard porous sand and in real aquifer sediments. Our results suggest that the organic surface coatings optimized for nano-Fe(0) in porous sand media do not necessarily reflect the same transportability in real field aquifer sediment. Xanthan gum-coated nano-Fe(0) showed highest transportability in standard porous sand, but the performance was much lower in real aquifer sediment, whereas the PAA-coated nano-Fe(0) particle showed better transportability both in aquifer sediment and in porous sand media...
February 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28214394/electrokinetic-enhanced-permanganate-delivery-and-remediation-of-contaminated-low-permeability-porous-media
#8
Ahmed I A Chowdhury, Jason I Gerhard, David Reynolds, Brent E Sleep, Denis M O'Carroll
Back diffusion of contaminants from low permeability strata has inhibited site remediation and closure due to an inability to deliver remediants into these strata. This study demonstrates the potential of electrokinetics (EK) to significantly reduce back diffusion of chlorinated compounds from low permeability porous media. Experiments were conducted in a two-dimensional sandbox packed with vertical layers of coarse sand and silt contaminated with aqueous trichloroethene (TCE). Three experiments, each approximately 41 days in duration, compared EK-enhanced in situ chemical oxidation (EK-ISCO) to EK or ISCO alone...
April 15, 2017: Water Research
https://www.readbyqxmd.com/read/28213734/dehalococcoides-and-general-bacterial-ecology-of-differentially-trichloroethene-dechlorinating-flow-through-columns
#9
Babur S Mirza, Darwin L Sorensen, Daniel J McGlinn, R Ryan Dupont, Joan E McLean
The diversity of Dehalococcoides mccartyi (Dhc) and/or other organohalide respiring or associated microorganisms in parallel, partial, or complete trichloroethene (TCE) dehalogenating systems has not been well described. The composition of Dhc populations and the associated bacterial community that developed over 7.5 years in the top layer (0-10 cm) of eight TCE-fed columns were examined using pyrosequencing. Columns biostimulated with one of three carbon sources, along with non-stimulated controls, developed into complete (ethene production, whey amended), partial (cis-dichloroethene (DCE) and VC, an emulsified oil with nonionic surfactant), limited (<5 % cis-DCE and 95 % TCE, an emulsified oil), and non- (controls) TCE dehalogenating systems...
February 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28202180/chemical-structure-influence-on-napl-mixture-nonideality-evolution-rate-limited-dissolution-and-contaminant-mass-flux
#10
Mark C Padgett, Geoffrey R Tick, Kenneth C Carroll, William R Burke
The influence of chemical structure on NAPL mixture nonideality evolution, rate-limited dissolution, and contaminant mass flux was examined. The variability of measured and UNIFAC modeled NAPL activity coefficients as a function of mole fraction was compared for two NAPL mixtures containing structurally-different contaminants of concern including toluene (TOL) or trichloroethene (TCE) within a hexadecane (HEXDEC) matrix. The results showed that dissolution from the NAPL mixtures transitioned from ideality for mole fractions >0...
February 3, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28199864/oxidation-of-trichloroethylene-by-the-hydroxyl-radicals-produced-from-oxygenation-of-reduced-nontronite
#11
Xixiang Liu, Songhu Yuan, Man Tong, Deng Liu
Reduction by Fe(II)-bearing silicate minerals has been proposed as an important mechanism for the attenuation of chlorinated hydrocarbons (CHCs) in anoxic subsurfaces. The redox condition of subsurface often changes from anoxic to oxic due to natural processes and human activities, but little is known about the transformation of CHCs induced by Fe(II)-bearing silicate minerals under oxic conditions. This study reveals that trichloroethylene (TCE) can be efficiently oxidized during the oxygenation of reduced nontronite at pH 7...
April 15, 2017: Water Research
https://www.readbyqxmd.com/read/28188205/metagenomic-and-metatranscriptomic-analyses-reveal-structure-and-dynamics-of-a-dechlorinating-community-containing-dehalococcoides-mccartyi-and-corrinoid-providing-microorganisms-under-cobalamin-limited-condition
#12
Yujie Men, Ke Yu, Jacob Bælum, Ying Gao, Julien Tremblay, Emmanuel Prestat, Ben Stenuit, Susannah G Tringe, Janet Jansson, Tong Zhang, Lisa Alvarez-Cohen
The aim of this study is to obtain a systems level understanding of the interactions between Dehalococcoides and corrinoid-supplying microorganisms by analyzing community structures and functional compositions, activities and dynamics in trichloroethene (TCE) - dechlorinating enrichments. Metagenomes and metatranscriptomes of the dechlorinating enrichments with and without exogenous cobalamin were compared. Seven putative draft genomes were binned from the metagenomes. At an early stage (2 d), more transcripts of genes in the Veillonellaceae bin-genome were detected in the metatranscriptome of the enrichment with exogenous cobalamin compared to the one without cobalamin addition...
February 10, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28182522/the-effects-of-tarantula-cubensis-venom-on-open-wound-healing-in-rats
#13
N Y Gul Satar, I T Cangul, A Topal, H Kurt, V Ipek, G I Onel
OBJECTIVE: The aim of this study was to evaluate the clinical and histopathological effects of two different dosages of alcohol extract of Tarantula cubensis (Theranekron) on open wounds. METHOD: A total of 24 Sprague-Dawley rats were randomly divided into Tarantula cubensis extract (TCE1, n=8) 1/10 diluted, TCE (TCE2, n=8), and (3) vehicle-control (0.2 ml of 96 % ethanol, n=8) groups. Experimental full-thickness 1 x 1cm wounds were created on dorsum skin. TCE or vehicle were given systemically by subcutaneous injections on postoperative days 1 and 4...
February 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28167031/opinion-taking-phytoremediation-from-proven-technology-to-accepted-practice
#14
REVIEW
Karen E Gerhardt, Perry D Gerwing, Bruce M Greenberg
Phytoremediation is the use of plants to extract, immobilize, contain and/or degrade contaminants from soil, water or air. It can be an effective strategy for on site and/or in situ removal of various contaminants from soils, including petroleum hydrocarbons (PHC), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), solvents (e.g., trichloroethylene [TCE]), munitions waste (e.g., 2,4,6-trinitrotoluene [TNT]), metal(loid)s, salt (NaCl) and radioisotopes. Commercial phytoremediation technologies appear to be underutilized globally...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28160680/phytoscreening-as-an-efficient-tool-to-delineate-chlorinated-solvent-sources-at-a-chlor-alkali-facility
#15
Loïc Yung, Jérôme Lagron, David Cazaux, Matt Limmer, Michel Chalot
Chlorinated ethenes (CE) are among the most common volatile organic compounds (VOC) that contaminate groundwater, currently representing a major source of pollution worldwide. Phytoscreening has been developed and employed through different applications at numerous sites, where it was generally useful for detection of subsurface chlorinated solvents. We aimed at delineating subsurface CE contamination at a chlor-alkali facility using tree core data that we compared with soil data. For this investigation a total of 170 trees from experimental zones was sampled and analyzed for perchloroethene (PCE) and trichloroethene (TCE) concentrations, measured by solid phase microextraction gas chromatography coupled to mass spectrometry...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28159790/the-effects-of-sulfate-reduction-on-tce-dechlorination-by-dehalococcoides-containing-microbial-communities
#16
Xinwei Mao, Alexandra Polasko, Lisa Alvarez-Cohen
In order to elucidate interactions between sulfate reduction and dechlorination, we systematically evaluated the effects of different concentrations of sulfate and sulfide on reductive dechlorination by isolates, constructed consortia and enrichments containing Dehalococcoides sp. Sulfate (up to 5 mM) did not inhibit growth or metabolism of pure cultures of dechlorinator Dehalococcoides mccartyi 195, sulfate reducer Desulfovibrio vulgaris Hildenborough (DvH) or syntroph Syntrophomonas wolfei (S. wolfei). In contrast, sulfide (5mM) exhibited inhibitory effects on growth of the sulfate reducer and the syntroph, as well as on both dechlorination and growth rates of D...
February 3, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28157851/cp-tensor-based-compression-of-hyperspectral-images
#17
Leyuan Fang, Nanjun He, Hui Lin
In this paper, an effective CANDECOMP/PARAFAC tensor-based compression (CPTBC) approach is proposed for on-ground hyperspectral images (HSIs). By considering the observed HSI cube as a whole three-order tensor, the proposed CPTBC method utilizes the CANDECOMP/PARAFAC tensor decomposition to decompose the original HSI data into the sum of R rank-1 tensors, which can simultaneously exploit both the spatial and spectral information of HSIs. Specifically, compared with the original HSI data, the R rank-1 tensors have fewer non-zero entries...
February 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/28131098/nitrate-reduction-and-its-effects-on-trichloroethylene-degradation-by-granular-iron
#18
Qiong Lu, Sung-Wook Jeen, Lai Gui, Robert W Gillham
Laboratory column experiments and reactive transport modeling were performed to evaluate the reduction of nitrate and its effects on trichloroethylene (TCE) degradation by granular iron. In addition to determining degradation kinetics of TCE in the presence of nitrate, the columns used in this study were equipped with electrodes which allowed for in situ measurements of corrosion potentials of the iron material. Together with Raman spectroscopic measurements the mechanisms of decline in iron reactivity were examined...
January 18, 2017: Water Research
https://www.readbyqxmd.com/read/28124303/smooth-zno-al-agnws-composite-electrode-for-flexible-organic-light-emitting-device
#19
Hu Wang, Kun Li, Ye Tao, Jun Li, Ye Li, Lan-Lan Gao, Guang-Yong Jin, Yu Duan
The high interest in organic light-emitting device (OLED) technology is largely due to their flexibility. Up to now, indium tin oxide (ITO) films have been widely used as transparent conductive electrodes (TCE) in organic opto-electronic devices. However, ITO films, typically deposited on glass are brittle and they make it difficult to produce flexible devices, restricting their use for flexible devices. In this study, we report on a nano-composite TCE, which is made of a silver nanowire (AgNW) network, combined with aluminum-doped zinc oxide (ZnO:Al, AZO) by atomic layer deposition...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28121996/the-effects-of-traditional-chinese-exercise-in-treating-knee-osteoarthritis-a-systematic-review-and-meta-analysis
#20
Yingjie Zhang, Lulu Huang, Youxin Su, Zhengxuan Zhan, Yanan Li, Xingquan Lai
BACKGROUND AND AIMS: Traditional Chinese exercise (TCE) includes a variety of exercise, which is being accepted by more and more people in the treatment of knee osteoarthritis (OA) from different countries. With the attendant, many clinical reports focus on it. Our meta-analysis aimed to systematically assess the effects of traditional Chinese exercise on pain, stiffness, physical function, quality of life, mental health and adverse events in people with knee osteoarthritis. METHODS: PubMed, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), the Web of Science, and Chinese Biomedical Literature Database (CBM) were searched from the time of their inception through April 2016 and risk of bias was independently assessed by two authors...
2017: PloS One
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