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https://www.readbyqxmd.com/read/28632325/nickelocene-precursor-facilitated-fast-growth-of-graphene-h-bn-vertical-heterostructures-and-its-applications-in-oleds
#1
Qiucheng Li, Zifeng Zhao, Baoming Yan, Xiuju Song, Zhepeng Zhang, Jia Li, Xiaosong Wu, Zuqiang Bian, Xiaolong Zou, Yanfeng Zhang, Zhongfan Liu
The direct growth of high-quality, large-area, uniform, vertically stacked Gr/h-BN heterostructures is of vital importance for applications in electronics and optoelectronics. However, the main challenge lies in the catalytically inert nature of the hexagonal boron nitride (h-BN) substrates, which usually afford a rather low decomposition rate of carbon precursors, and thus relatively low growth rate of graphene. Herein, a nickelocene-precursor-facilitated route is developed for the fast growth of Gr/h-BN vertical heterostructures on Cu foils, which shows much improved synthesis efficiency (8-10 times faster) and crystalline quality of graphene (large single-crystalline domain up to ≈20 µm)...
June 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28629102/bioelectrochemical-approach-for-control-of-methane-emission-from-wetlands
#2
Shentan Liu, Xiaojuan Feng, Xianning Li
To harvest electricity and mitigate methane emissions from wetlands, a novel microbial fuel cell coupled constructed wetland (MFC-CW) was assembled with an anode placing in the rhizosphere and a cathode on the water surface. Plant-mediated methane accounted for 71-82% of the total methane fluxes. The bioanode served as an inexhaustible source of electron acceptors and resulted in reduced substantial methane emissions owing to electricigens outcompeting methanogens for carbon and electrons when substrate was deficient...
June 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28628164/long-alkyl-side-chains-impede-exciton-interaction-in-organic-light-harvesting-crystals
#3
Kalaivanan Nagarajan, Gopika Gopan, Rijo T Cheriya, Mahesh Hariharan
Side-chains at the imidic position of naphthalimide rendered a firm control over (i) the degrees of π-π overlap and (ii) distances between the perylenimide units in a crystalline naphthalimide-perylenimide dyad as determined using single crystal XRD and Hirshfeld surface analyses. Steady-state and time-resolved electronic spectroscopy in addition to DFT calculations revealed a decline in intermolecular excitonic interaction due to interfering alkyl chains.
June 19, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28624055/sevoflurane-preconditioning-protects-from-posttransplant-injury-in-mouse-lung-transplantation
#4
Yoshito Yamada, Isabelle Laube, Jae-Hwi Jang, John M Bonvini, Ilhan Inci, Walter Weder, Beatrice Beck Schimmer, Wolfgang Jungraithmayr
BACKGROUND: Although sevoflurane (Sevo) had been shown to ameliorate posttransplant injury in various organs, data available are inconsistent, particularly in the context of lung transplantation (Tx). We here investigated if preconditioning by Sevo can protect from posttransplant injury regarding both, primary graft dysfunction (PGD) and acute rejection (AR) after experimental lung Tx, thereby focusing on two important clinical outcome parameters. MATERIALS AND METHODS: Three experimental approaches were used: (1) BALB/c mice were preconditioned for 2 h with Sevo or a fentanyl cocktail (Control; n = 10); (2) syngeneic (Syn) mouse lung Tx (C57BL/6) with a Sevo-preconditioned graft followed by 18 h storage to mimic PGD (Syn-Tx, n = 12) versus controls (fentanyl cocktail); and (3) allogeneic (Allo) Tx (BALB/c, donor; C57BL/6, recipient) to mimic AR (Allo-Tx, n = 12) versus controls (fentanyl cocktail)...
June 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28623300/improving-photocatalytic-performance-from-bi2wo6-mos2-graphene-hybrids-via-gradual-charge-transferred-pathway
#5
Ming Liu, Xin Xue, Shansheng Yu, Xiaoyi Wang, Xiaoying Hu, Hongwei Tian, Hong Chen, Weitao Zheng
The charge transfer from the main catalyst to the cocatalyst is a key factor to enhance catalytic activity for photocatalytic nanocomposite materials. In order to enhance the charge transfer between Bi2WO6 and graphene, we inlet MoS2 as a "stepping-stone" into Bi2WO6 and graphene. Here, we report an effective strategy to synthesize ternary Bi2WO6@MoS2/graphene nanocomposite photocatalyst by a facile two-step hydrothermal method, which is afforded by assembling two cocatalysts, graphene and MoS2, into the Bi2WO6 matrix with a nanoparticle morphology as a visible light harvester...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28621356/dye-sensitized-lanthanide-doped-upconversion-nanoparticles
#6
Xindong Wang, Rashid R Valiev, Tymish Y Ohulchanskyy, Hans Ågren, Chunhui Yang, Guanying Chen
Lanthanide-doped upconversion nanoparticles (UCNPs) are promising for applications as wide as biological imaging, multimodal imaging, photodynamic therapy, volumetric displays, and solar cells. Yet, the weak and narrow absorption of lanthanide ions poses a fundamental limit of UCNPs to withhold their brightness, creating a long-standing hurdle for the field. Dye-sensitized UCNPs are emerging to address this performance-limiting problem, yielding up to thousands-fold brighter luminescence than conventional UCNPs without dye sensitization...
June 16, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28616781/impact-of-hyperglycemia-on-cystathionine-%C3%AE-lyase-expression-during-resuscitated-murine-septic-shock
#7
Tamara Merz, Josef A Vogt, Ulrich Wachter, Enrico Calzia, Csaba Szabo, Rui Wang, Peter Radermacher, Oscar McCook
BACKGROUND: Cystathionine-γ-lyase (CSE) was shown to have a regulatory role in glucose metabolism. Circulatory shock can induce metabolic stress, thereby leading to hyperglycemia and mitochondrial dysfunction. In vitro data suggest an effect of high glucose on CSE expression. Therefore, the aim of this study was to investigate the effects of hyperglycemia on CSE expression in resuscitated murine septic shock. METHODS: Normo- (80-150 mg/dl) and hyperglycemic (>200 mg/dl) male C57/BL6J mice (n = 5-6 per group) underwent cecal ligation and puncture (CLP)-induced polymicrobial sepsis or sham procedure (n = 6 per group) and, 15 h afterwards, were anesthetized again, surgically instrumented and received intensive care treatment, including antibiotics, lung protective mechanical ventilation, circulatory support, and intravenous (i...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28616612/robotic-gastrectomy-for-gastric-cancer
#8
REVIEW
Masanori Tokunaga, Akio Kaito, Shizuki Sugita, Masahiro Watanabe, Hideki Sunagawa, Takahiro Kinoshita
The number of robotic gastrectomy (RG) performed per year has been increasing, particularly in East Asia where the incidence of gastric cancer is high and approximately half of the cases are diagnosed as early gastric cancer. With articulated devices of RG, surgeons are able to perform every procedure more meticulously, which can result in less bleeding and damage to organs. There are many single arm and comparative studies, and these study showed similar trends, which included relatively less estimated blood loss and longer operation time following RG than laparoscopic gastrectomy (LG), equivalent number of harvested lymph nodes and similar length of postoperative hospital stay between RG and LG...
2017: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28614181/cochleovestibular-gene-transfer-in-neonatal-mice-by-canalostomy
#9
Jing-Ying Guo, Yu-Ying Liu, Teng-Fei Qu, Zhe Peng, Jing Xie, Guo-Peng Wang, Shu-Sheng Gong
Impairments of the inner ear result in sensorineural hearing loss and vestibular dysfunction in humans. A large proportion of these disorders are congenital, and involve both auditory and vestibular systems. Therefore, genetic interventions to correct deficits must be administered during early developmental stages. In this study, we evaluated inner ear gene transfer in neonatal mice by canalostomy using an adeno-associated virus serotype 8 (AAV8) vector. AAV8 with the green fluorescence protein (GFP) gene was inoculated into the inner ear of the neonatal mice through the posterior semicircular canal (canalostomy)...
June 13, 2017: Neuroreport
https://www.readbyqxmd.com/read/28614141/role-of-hemorrhagic-shock-in-experimental-polytrauma
#10
Stephanie Denk, Sebastian Weckbach, Philipp Eisele, Christian K Braun, Rebecca Wiegner, Julia J Ohmann, Lisa Wrba, Felix M Hoenes, Philipp Kellermann, Peter Radermacher, Ulrich Wachter, Sebastian Hafner, Oscar McCook, Anke Schultze, Annette Palmer, Sonja Braumüller, Florian Gebhard, Markus Huber-Lang
Hemorrhagic shock (HS) after tissue trauma increases the complication and mortality rate of polytrauma (PT) patients. Although several murine trauma models have been introduced, there is a lack of knowledge about the exact impact of an additional HS. We hypothesized that HS significantly contributes to organ injury, which can be reliably monitored by detection of specific organ damage markers.Therefore we established a novel clinically relevant PT plus HS model in C57BL/6 mice which were randomly assigned to control, HS, PT or PT+HS procedure (n = 8 per group)...
June 13, 2017: Shock
https://www.readbyqxmd.com/read/28613316/enhancing-the-visible-light-absorption-and-charge-separation-of-bi2wo6-by-hybridizing-a-cutcpp-sensitizer
#11
Zhijie Zhang, Hui Liu, Jiayue Xu, Na Zhang
In order to utilize solar light more efficiently, a Bi2WO6 photocatalyst was sensitized by Cu(ii) meso-tetra (4-carboxyphenyl) porphyrin (CuTCPP). The obtained CuTCPP/Bi2WO6 composite exhibited enhanced photocatalytic activity in the degradation of an organic pollutant, rhodamine B (RhB), under simulated solar light irradiation as well as visible light beyond the absorption edge of Bi2WO6 (λ > 450 nm). The enhancement of the photocatalytic activity can be attributed to the sensitization effect of CuTCPP, which increased the visible-light harvesting, as well as the well-matched overlapping band structures between CuTCPP and Bi2WO6, which facilitated the separation of photo-generated electron-hole pairs...
June 14, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28609649/resistance-of-legionella-and-acanthamoeba-mauritaniensis-to-heat-treatment-as-determined-by-relative-and-quantitative-polymerase-chain-reactions
#12
Penelope H Dobrowsky, Sehaam Khan, Wesaal Khan
Legionella and Acanthamoeba spp. persist in harvested rainwater pasteurized at high temperatures (> 72°C) and the interaction mechanisms exhibited between these organisms need to be elucidated. The resistance of two Legionella reference strains (Legionella pneumophila ATCC 33152 and Legionella longbeachae ATCC 33462), three environmental strains [Legionella longbeachae (env.), Legionella norrlandica (env.) and Legionella rowbothamii (env.)] and Acanthamoeba mauritaniensis ATCC 50676 to heat treatment (50-90°C) was determined by monitoring culturability and viability [ethidium monoazide quantitative polymerase chain reaction (EMA-qPCR)]...
June 10, 2017: Environmental Research
https://www.readbyqxmd.com/read/28606046/converting-enzymes-into-tools-of-industrial-importance
#13
Ipsita Roy, Shivcharan Prasad
The term enzyme ('in yeast') was first used by Wilhelm Kuhne while describing the ability of yeast to produce alcohol from sugars. Since then, there has been a determined effort to use enzymes for catalysing reactions. When compared with chemical catalysts, enzymes offer very high selectivity when acting as catalysts. This could be in terms of chemo- (functional group), regio- (positional) or stereo- (chirality) selectivity. Such selectivity yields a product which is free from impurities; the cost of the product is also reduced as the number of steps is less...
June 12, 2017: Recent Patents on Biotechnology
https://www.readbyqxmd.com/read/28605991/-i-in-vivo-i-assessment-of-engineered-skin-cell-delivery-with-multimodal-optical-microscopy
#14
Andrew J Bower, Ziad Mahmassani, Youbo Zhao, Eric J Chaney, Marina Marjanovic, Min Kyung Lee, Benedikt Graf, Michael De Lisio, Hyun Joon Kong, Marni D Boppart, Stephen A Boppart
The healing process is often significantly impaired under conditions of chronic or large area wounds, which are often treated clinically using autologous split-thickness skin grafts. However, in many cases, harvesting of donor tissue presents a serious problem such as in the case of very large area burns. In response to this, engineered biomaterials have emerged that attempt to mimic the natural skin environment or deliver a suitable therapy to assist in the healing process. In this study, a custom-built multimodal optical microscope capable of noninvasive structural and functional imaging is used to investigate both the engineered tissue microenvironment and the <i>in vivo</i> wound healing process...
June 12, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28604725/subunit-and-chlorophyll-organization-of-the-plant-photosystem-ii-supercomplex
#15
Laura S van Bezouwen, Stefano Caffarri, Ravindra S Kale, Roman Kouřil, Andy-Mark W H Thunnissen, Gert T Oostergetel, Egbert J Boekema
Photosystem II (PSII) is a light-driven protein, involved in the primary reactions of photosynthesis. In plant photosynthetic membranes PSII forms large multisubunit supercomplexes, containing a dimeric core and up to four light-harvesting complexes (LHCs), which act as antenna proteins. Here we solved a three-dimensional (3D) structure of the C2S2M2 supercomplex from Arabidopsis thaliana using cryo-transmission electron microscopy (cryo-EM) and single-particle analysis at an overall resolution of 5.3 Å...
June 12, 2017: Nature Plants
https://www.readbyqxmd.com/read/28601518/biochemical-responses-and-ultrastructural-changes-in-ethylene-insensitive-mutants-of-arabidopsis-thialiana-subjected-to-bisphenol-a-exposure
#16
Imran Ali, Mehmood Jan, Abdul Wakeel, Azizullah Azizullah, Bohan Liu, Faisal Islam, Abid Ali, M K Daud, Yihua Liu, Yinbo Gan
Bisphenol A (BPA), an important raw material in plastic industry, has become a serious environmental contaminant due to its wide spread use in different products and increasing release into the environment. BPA is known to cause adverse effects in living organisms including plants. Several studies reported that BPA affects growth and development in plants, mainly through oxidative stress. Plants are known to generally cope with stress mainly through hormonal regulation and adaptation, but little is known about the role of plant hormones in plants under BPA stress...
June 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28601456/inclusion-of-wheat-and-triticale-silage-in-the-diet-of-lactating-dairy-cows
#17
M T Harper, J Oh, F Giallongo, G W Roth, A N Hristov
The objective of this experiment was to partially replace corn silage with 2 alternative forages, wheat (Triticum aestivum) or triticale (X Triticosecale) silages at 10% of the diet dry matter (DM), and investigate the effects on dairy cow productivity, nutrient utilization, enteric CH4 emissions, and farm income over feed costs. Wheat and triticale were planted in the fall as cover crops and harvested in the spring at the boot stage. Neutral- and acid-detergent fiber and lignin concentrations were higher in the wheat and triticale silages compared with corn silage...
June 7, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28600937/consideration-of-rainwater-quality-parameters-for-drinking-purposes-a-case-study-in-rural-vietnam
#18
Minju Lee, Mikyeong Kim, Yonghwan Kim, Mooyoung Han
Rainwater, which is used for drinking purposes near Hanoi, Vietnam, was analysed for water quality based on 1.5 years of monitoring data. In total, 23 samples were collected from different points within two rainwater harvesting systems (RWHSs). Most parameters met the standard except micro-organisms. Coliform and Escherichia coli (E. coli) were detected when the rainwater was not treated with ultraviolet (UV) light; however, analysis of rainwater after UV sterilisation showed no trace of micro-organisms. The RWHSs appear to provide drinking water of relatively good quality compared with surface water and groundwater...
June 7, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28588417/photosynthetic-pigment-protein-complexes-as-highly-connected-networks-implications-for-robust-energy-transport
#19
REVIEW
Lewis A Baker, Scott Habershon
Photosynthetic pigment-protein complexes (PPCs) are a vital component of the light-harvesting machinery of all plants and photosynthesizing bacteria, enabling efficient transport of the energy of absorbed light towards the reaction centre, where chemical energy storage is initiated. PPCs comprise a set of chromophore molecules, typically bacteriochlorophyll species, held in a well-defined arrangement by a protein scaffold; this relatively rigid distribution leads to a viewpoint in which the chromophore subsystem is treated as a network, where chromophores represent vertices and inter-chromophore electronic couplings represent edges...
May 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28585832/polymer-chlorosome-nanocomposites-consisting-of-non-native-combinations-of-self-assembling-bacteriochlorophylls
#20
Gregory S Orf, Aaron M Collins, Dariusz M Niedzwiedzki, Marcus Tank, Vera Thiel, Adam Kell, Donald A Bryant, Gabriel A Montaño, Robert E Blankenship
Chlorosomes are one of the characteristic light-harvesting antennas from green sulfur bacteria. These complexes represent a unique paradigm: self-assembly of bacteriochlorophyll pigments within a lipid monolayer without the influence of protein. Because of their large size and reduced complexity, they have been targeted as models for the development of bioinspired light-harvesting arrays. We report the production of biohybrid light-harvesting nanocomposites mimicking chlorosomes, composed of amphiphilic diblock copolymer membrane bodies that incorporate thousands of natural self-assembling bacteriochlorophyll molecules derived from green sulfur bacteria...
June 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
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