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https://www.readbyqxmd.com/read/28449549/fabrication-of-tio2-nanosheet-aarrays-graphene-cu2o-composite-structure-for-enhanced-photocatalytic-activities
#1
Jinzhao Huang, Ke Fu, Xiaolong Deng, Nannan Yao, Mingzhi Wei
TiO2 NSAs/graphene/Cu2O was fabricated on the carbon fiber to use as photocastalysts by coating Cu2O on the graphene (G) decorated TiO2 nanosheet arrays (NSAs). The research focus on constructing the composite structure and investigating the reason to enhance the photocatalytic ability. The morphological, structural, and photocatalytic properties of the as-synthesized products were characterized. The experimental results indicate that the better photocatalytic performance is ascribed to the following reasons...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449547/cobalt-oxide-porous-nanofibers-directly-grown-on-conductive-substrate-as-a-binder-additive-free-lithium-ion-battery-anode-with-high-capacity
#2
Hao Liu, Zheng Zheng, Bochao Chen, Libing Liao, Xina Wang
In order to reduce the amount of inactive materials, such as binders and carbon additives in battery electrode, porous cobalt monoxide nanofibers were directly grown on conductive substrate as a binder/additive-free lithium-ion battery anode. This electrode exhibited very high specific discharging/charging capacities at various rates and good cycling stability. It was promising as high capacity anode materials for lithium-ion battery.
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449462/pulmonary-function-tests-findings-and-their-diagnostic-value-in-patients-with-igg4-related-disease
#3
Lu Cao, Yi-Bing Chen, Da-Hui Zhao, Wen-Fang Shi, Song Meng, Li-Xin Xie
BACKGROUND: IgG4-related disease (IgG4-RD) is an immune-mediated fibroinflammatory disorder that can affect most organs. To date, there have been no detailed assessments of pulmonary function in patients with IgG4-RD. In this study, we investigated pulmonary function in IgG4-RD patients and evaluated the value of pulmonary function tests (PFTs) in diagnosing IgG4-related respiratory disease (IgG4-RRD). METHODS: This was a retrospective study of 17 patients with IgG4-RD...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449325/electrosynthesis-of-bifunctional-ws3-x-rgo-hybrid-for-her-and-orr-electrocatalysis
#4
Martin Pumera
We combined the desirable properties of tungsten sulfide and reduced graphene oxide (rGO) and fabricated the hybrid materials through simultaneous electrochemical reduction and synthesis, as a versatile and environmentally benign alternative to conventional fabrication techniques. We synthesised a mixed WS2/WS3 film-like material (WS3-x) directly onto GO-modified glassy carbon electrodes via cyclic voltammetry (CV) and the resultant hybrid materials (WS3-x/rGO) were thoroughly characterised using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) as well as Raman spectroscopy...
April 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28449245/characterization-of-a-poly-4-vinylpyridine-supported-cupd-bimetallic-catalyst-for-sonogashira-coupling-reactions
#5
Claudio Evangelisti, Antonella Balerna, Rinaldo Psaro, Graziano Fusini, Adriano Carpita, Maurizio Benfatto
CuPd bimetallic Solvated Metal Atoms (SMA) synthesized by metal vapor synthesis (MVS) technique and supported on poly-4-vinylpyridine (PVPy) resin, showed signicantly higher catalytic activity in Sonogashira-type carbon-carbon coupling reactions than the corresponding monometallic Cu and Pd systems as well as their physical mixture. The analysis of the bimetallic catalyst combining high-resolution transmission electron microscopy (HRTEM) and x-ray absorption ne structure (XAFS) spectroscopy revealed the presence of small Pd nanoparticles (dm = 2...
April 27, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28449056/plant-hexokinases-are-multifaceted-proteins
#6
Giovanna P Aguilera-Alvarado, Sobeida Sánchez-Nieto
Sugars are the main carbon and energy source in cells, but they can also act as signaling molecules that affect the whole plant life cycle. Certain tissues can produce sugars and supply them to others, and this plant tissue heterogeneity makes sugar signaling a highly complex process that requires elements capable of perceiving changes in sugar concentrations among different tissues, cell compartments and developmental stages. In plants, the regulatory effects of Glucose (Glc) have been the most studied to date...
April 25, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28449002/purification-and-biochemical-and-kinetic-properties-of-an-endo-polygalacturonase-from-the-industrial-fungus-aspergillus-sojae
#7
Dante Fratebianchi, Ivana Alejandra Cavello, Sebastián Fernando Cavalitto
An endo-polygalacturonase secreted by Aspergillus sojae was characterized after being purified to homogeneity from submerged cultures with orange peel as the sole carbon source by gel filtration and ion-exchange chromatographies. According to SDS-PAGE and analytical isoelectric focusing analyses, the enzyme presents a molecular weight of 47 kDa and pI value of 4.2. This enzyme exhibits considerable stability under highly acidic to neutral conditions (pH 1.5-6.5) and presents a half-life of 2 h at 50°C. Besides its activity towards pectin and polygalacturonic acid, the enzyme displays pectin-releasing activity, acting best in a pH range of 3...
April 28, 2017: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28448964/antioxidant-and-hepatoprotective-effect-of-swertiamarin-on-carbon-tetrachloride-induced-hepatotoxicity-via-the-nrf2-ho-1-pathway
#8
Tao Wu, Jingjing Li, Yong Li, Hongping Song
BACKGROUND/AIMS: Swertiamarin (STM), the main bioactive component in Swertia mussotii Franch (Gentianaceae), has been shown to exert hepatoprotective effects on experimental liver injury. However, the effects and exact mechanisms of STM on carbon tetrachloride (CCl4) causing hepatotoxicity are still unknown. This study investigated the potential protective effects and mechanisms of STM on CCl4-induced liver injury in rats. METHODS: Adult male Sprague-Dawley (SD) rats were exposed to CCl4 with or without STM co-administration for consecutive eight weeks...
April 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28448933/in-vitro-bioaccessibility-of-copper-azole-following-simulated-dermal-transfer-from-pressure-treated-wood
#9
Jennifer L Griggs, Kim R Rogers, Clay Nelson, Todd Luxton, William E Platten, Karen D Bradham
Micronized copper azole (MCA) and micronized copper quaternary (MCQ) are the latest wood preservatives to replace the liquid alkaline copper and chromated copper arsenate preservatives due to concerns over the toxicity or lack of effectiveness of the earlier formulations. Today, the use of MCA has become abundant in the wood preservative industry with approximately 38millionlbs of copper carbonate being used to treat lumber each year. Despite this widespread usage, little information is available on the bioaccessibility of this preservative upon gastrointestinal exposure...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448929/microbial-use-of-low-molecular-weight-dom-in-filtered-and-unfiltered-freshwater-role-of-ultra-small-microorganisms-and-implications-for-water-quality-monitoring
#10
F L Brailsford, H C Glanville, M R Marshall, P N Golyshin, P J Johnes, C A Yates, A T Owen, D L Jones
Dissolved organic matter (DOM) plays a central role in regulating productivity and nutrient cycling in freshwaters. It is therefore vital that we can representatively sample and preserve DOM in freshwaters for subsequent analysis. Here we investigated the effect of filtration, temperature (5 and 25°C) and acidification (HCl) on the persistence of low molecular weight (MW) dissolved organic carbon (DOC), nitrogen (DON) and orthophosphate in oligotrophic and eutrophic freshwater environments. Our results showed the rapid loss of isotopically-labelled glucose and amino acids from both filtered (0...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448923/impacts-of-himalayas-on-black-carbon-over-the-tibetan-plateau-during-summer-monsoon
#11
Shuyu Zhao, Xuexi Tie, Xin Long, Junji Cao
The Tibetan Plateau (TP) plays important roles in global climate and environment. This study combines in-situ BC measurements in the Himalayas and the Indo-Gangetic Plain (IGP) with a regional dynamical and chemical model (WRF-Chem model) to investigate the effect of the trans-Himalayas on black carbon (BC) from the IGP to the TP during Indian summer monsoon. To determine topographic effects of the trans-Himalayas on BC concentrations over the TP, sensitive experiments were conducted by applying the WRF-Chem model...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448921/novel-bone-surrogates-for-cranial-surgery-training
#12
Marianne Hollensteiner, David Fürst, Benjamin Esterer, Peter Augat, Falk Schrödl, Stefan Hunger, Michael Malek, Daniel Stephan, Andreas Schrempf
Parietal graft lifts are trained on human or animal specimens or are directly performed on patients without extensive training. In order to prevent harm to the patient resulting from fast rotating machinery tools, the surgeon needs to apply appropriate forces. Realistic haptics are essential to identify the varying parietal bone layers and to avoid a penetration of the brain. This however, requires experience and training. Therefore, in this study, bone surrogate materials were evaluated with the aim to provide an anatomically correct artificial skull cap with realistic haptic feedback for graft lift training procedures...
April 19, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28448915/ozone-exposure-affects-tree-defoliation-in-a-continental-climate
#13
Alessandra De Marco, Marcello Vitale, Ionel Popa, Alessandro Anav, Ovidiu Badea, Diana Silaghi, Stefan Leca, Augusto Screpanti, Elena Paoletti
Ground-level ozone (O3) affects trees through visible leaf injury, accelerating leaf senescence, declining foliar chlorophyll content, photosynthetic activity, growth, carbon sequestration, predisposing to pests attack and a variety of other physiological effects. Tree crown defoliation is one of the most important parameters that is representative of forest health and vitality. Effects of air pollution on forests have been investigated through manipulative experiments that are not representative of the real environmental conditions observed in the field...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448911/adsorption-of-polar-organic-molecules-on-sediments-case-study-on-callovian-oxfordian-claystone
#14
S Rasamimanana, G Lefèvre, R V H Dagnelie
The release and transport of anthropogenic organic matter through the geosphere is often an environmental criterion of safety. Sedimentary rocks are widely studied in this context as geological barriers for waste management. It is the case of Callovian-Oxfordian claystone (COx), for which several studies report adsorption of anthropogenic organic molecules. In this study, we evaluated and reviewed adsorption data of polar organic molecules on COx claystone. Experiments were performed on raw claystone, decarbonated and clay fractions...
April 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448909/changes-in-heavy-metal-mobility-and-availability-from-contaminated-wetland-soil-remediated-with-combined-biochar-compost
#15
Jie Liang, Zhaoxue Yang, Lin Tang, Guangming Zeng, Man Yu, Xiaodong Li, Haipeng Wu, Yingying Qian, Xuemei Li, Yuan Luo
The combination of biochar and compost has been proven to be effective in heavy metals contaminated wetland soil restoration. However, the influence of different proportions between biochar and compost on immobilization of heavy metals in soil has been less studied up to date. Therefore, we investigated the effect of different ratios of biochar-compost mixtures on availability and speciation distribution of heavy metals (Cd, Zn and Cu) in wetland soil. The results showed that applying all amendment combinations into wetland soil increased gradually the total organic carbon (TOC) and water-extract organic carbon (WEOC) as the compost percentage rose in biochar-composts...
April 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448907/characterization-of-typical-metal-particles-during-haze-episodes-in-shanghai-china
#16
Rui Li, Xin Yang, Hongbo Fu, Qingqing Hu, Liwu Zhang, Jianmin Chen
Aerosol particles were collected during three heavy haze episodes at Shanghai in the winter of 2013. Transmission electron microscopy (TEM) coupled with energy dispersive X-ray spectroscopy was used to study the morphology and speciation of typical metal particles at a single-particle level. In addition, time-of-flight aerosol mass spectrometry (ATOFMS) was applied to identify the speciation of the Fe-containing particles. TEM analysis indicated that various metal-containing particles were hosted by sulfates, nitrates, and oxides...
April 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448879/adsorption-of-organic-arsenic-acids-from-water-over-functionalized-metal-organic-frameworks
#17
Mithun Sarker, Ji Yoon Song, Sung Hwa Jhung
Organic arsenic acids (OAAs) are regarded as water pollutants because of their toxicity and considerable solubility in water. Adsorption of OAAs such as phenylarsonic acid (PAA) and p-arsanilic acid (ASA) from water was investigated over functionalized (with OH groups) metal-organic framework (MOF, MIL-101), as well as over pristine MIL-101 and commercial activated carbon. The highly porous MIL-101 bearing three hydroxyl groups (MIL-101(OH)3) exhibited remarkable PAA and ASA adsorption capacities. Based on the effects of pH on PAA and ASA adsorption, hydrogen bonding was suggested as a plausible mechanism of OAA adsorption...
April 19, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28448868/protective-effects-of-teucrium-polium-aqueous-extract-and-ascorbic-acid-on-hematological-and-some-biochemical-parameters-against-carbon-tetrachloride-ccl4-induced-toxicity-in-rats
#18
Fatma Rahmouni, Latifa Hamdaoui, Riadh Badraoui, Tarek Rebai
Herbal drugs play a crucial function to protect organisms from the toxic effect of some compounds. The present study was designed to evaluate the protective effects of Teucrium Polium (TP) aqueous extract and vitamin C (Vit C) against carbon tetrachloride (CCl4) which induced toxicity in rats. Male albino Wistar rats were divided into six groups: group I was used as controls, group II received CCl4 in olive oil (0.5ml/kg) by gavage, and group III received CCl4 in olive oil (0.5ml/kg) by gavage after three days of receiving TP (5g/l), orally, for seven days; Group IV received TP (5g/l) alone, orally, for seven days, Group V received CCl4 in olive oil (0...
April 24, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28448855/glassy-carbon-electrode-modified-with-7-7-8-8-tetracyanoquinodimethane-and-graphene-oxide-triggered-a-synergistic-effect-low-potential-amperometric-detection-of-reduced-glutathione
#19
Baiqing Yuan, Chunying Xu, Renchun Zhang, Donghui Lv, Sujuan Li, Daojun Zhang, Lin Liu, Carlos Fernandez
A sensitive electrochemical sensor based on the synergistic effect of 7,7,8,8-tetracyanoquinodimethane (TCNQ) and graphene oxide (GO) for low-potential amperometric detection of reduced glutathione (GSH) in pH 7.2 phosphate buffer solution (PBS) has been reported. This is the first time that the combination of GO and TCNQ have been successfully employed to construct an electrochemical sensor for the detection of glutathione. The surface of the glassy carbon electrode (GCE) was modified by a drop casting using TCNQ and GO...
April 21, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28448844/consequences-of-bioenergy-wood-extraction-for-landscape-level-availability-of-habitat-for-dead-wood-dependent-organisms
#20
Matthew Hiron, Mats Jonsell, Ariana Kubart, Göran Thor, Martin Schroeder, Anders Dahlberg, Victor Johansson, Thomas Ranius
Stumps and slash resulting from forest clearcutting is used as a source of low-net-carbon energy, but there are concerns about the consequences of biofuel extraction on biodiversity. Logging residues constitute potentially important habitats, since a large part of forest biodiversity is dependent on dead wood. Here we used snapshot field data from a managed forest landscape (25 000 ha) to predict landscape scale population changes of dead wood dependent organisms after extraction of stumps and slash after clearcutting...
April 24, 2017: Journal of Environmental Management
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