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https://www.readbyqxmd.com/read/28107616/superhydrophilic-antireflective-periodic-mesoporous-organosilica-coating-on-flexible-polyimide-substrate-with-strong-abrasion-resistance
#1
Jing Wang, Cong Zhang, Chunming Yang, Ce Zhang, Mengchao Wang, Jing Zhang, Yao Xu
Superhydrophilic antireflective periodic mesoporous organosilica (PMO) coating was prepared on flexible polyimide substrate via solvent-evaporation-induced self-assembly (SEISA) method, in which tetraethoxysilane (TEOS) and a special bridged silsesquioxane were used as reactants. The bridged silsesquioxane, EG-BSQ, was synthesized through the stoichiometric reaction between 3-glycidoxyporpyltrimethoxysilane (GPTMS) and ethylene diamine (EDA) at 60 (○)C with no catalyst. Under the influence of surfactant, TEOS and EG-BSQ co-condensed and enclosed the ordered mesporous in the coating...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28107070/tracheal-collapse-in-a-pekin-duck-anas-platyrhynchos-domestica
#2
Eugénie Henry-Guyot, Isabelle Langlois, Isabelle Lanthier, Dipl Acvp
A 5-year-old, 3.72-kg female Pekin duck ( Anas platyrhynchos domestica) was presented for acute respiratory distress, head shaking, and collapse. Similar spontaneously resolving episodes had previously occurred. Physical examination revealed severe inspiratory and expiratory dyspnea. Due to poor prognosis, euthanasia was elected. Postmortem examination revealed severe tracheal collapse involving the proximal trachea. The tracheal lumen was reduced in size by 75%. Histologic evaluation revealed ossification of the tracheal rings for approximately 60%-100% of their circumference...
December 2016: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28106460/fermi-large-area-telescope-as-a-galactic-supernovae-axionscope
#3
M Meyer, M Giannotti, A Mirizzi, J Conrad, M A Sánchez-Conde
In a Galactic core-collapse supernova (SN), axionlike particles (ALPs) could be emitted via the Primakoff process and eventually convert into γ rays in the magnetic field of the Milky Way. From a data-driven sensitivity estimate, we find that, for a SN exploding in our Galaxy, the Fermi Large Area Telescope (LAT) would be able to explore the photon-ALP coupling down to g_{aγ}≃2×10^{-13}  GeV^{-1} for an ALP mass m_{a}≲10^{-9}  eV. These values are out of reach of next generation laboratory experiments...
January 6, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28106438/relativistic-axions-from-collapsing-bose-stars
#4
D G Levkov, A G Panin, I I Tkachev
The substructures of light bosonic (axionlike) dark matter may condense into compact Bose stars. We study the collapse of critical-mass stars caused by attractive self-interaction of the axionlike particles and find that these processes proceed in an unexpected universal way. First, nonlinear self-similar evolution (called "wave collapse" in condensed matter physics) forces the particles to fall into the star center. Second, interactions in the dense center create an outgoing stream of mildly relativistic particles which carries away an essential part of the star mass...
January 6, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28106216/kinetics-of-polymer-collapse-effect-of-temperature-on-cluster-growth-and-aging
#5
Suman Majumder, Johannes Zierenberg, Wolfhard Janke
Using state of the art Monte Carlo simulations of a bead-spring model we investigate both the equilibrium and the nonequilibrium behavior of the homopolymer collapse. The equilibrium properties obtained via multicanonical sampling recover the well-known finite-size scaling behavior of collapse for our model polymer. For the nonequilibrium dynamics we study the collapse by quenching the homopolymer from an expanded coiled state into the globular phase. The sequence of events observed during the collapse is independent of the quench depth...
January 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28106212/imparting-surface-hydrophobicity-to-metal-organic-frameworks-using-a-facile-solution-immersion-process-to-enhance-water-stability-for-co2-capture
#6
Xukun Qian, Fuxing Sun, Jing Sun, Hongyu Wu, Fei Xiao, Xinxin Wu, Guangshan Zhu
The water sensitivity of metal-organic frameworks (MOFs) poses a critical issue for their large-scale applications. One effective method to solve this is to provide MOFs with a hydrophobic surface. Herein, we develop a facile solution-immersion process to deposit a hydrophobic coating on the MOFs' external surface without blocking their intrinsic pores. The water contact angle of the surface hydrophobic (SH) MOFs is ∼146°. The hydrophobic coating not only greatly enhances MOFs' water stability but also provides durable protection against the attack of water molecules...
January 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28106043/humans-rather-than-climate-the-primary-cause-of-pleistocene-megafaunal-extinction-in-australia
#7
Sander van der Kaars, Gifford H Miller, Chris S M Turney, Ellyn J Cook, Dirk Nürnberg, Joachim Schönfeld, A Peter Kershaw, Scott J Lehman
Environmental histories that span the last full glacial cycle and are representative of regional change in Australia are scarce, hampering assessment of environmental change preceding and concurrent with human dispersal on the continent ca. 47,000 years ago. Here we present a continuous 150,000-year record offshore south-western Australia and identify the timing of two critical late Pleistocene events: wide-scale ecosystem change and regional megafaunal population collapse. We establish that substantial changes in vegetation and fire regime occurred ∼70,000 years ago under a climate much drier than today...
January 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28106010/models-of-life-epigenetics-diversity-cycles
#8
Kim Sneppen
This review emphasize aspects of biology that can be understood through repeated applications of simple causal rules. The selected topics include perspectives on gene regulation, phage lambda development, epigenetics, microbial ecology, as well as model approaches to diversity and punctuated equilibrium in evolution. Two outstanding features are repeatedly described. One is minimal rules to sustain specific states of a complex systems for a long time. The other is the collapse of such states and the subsequent dynamical cycle of situations that later return to new metastable states...
January 20, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28104281/-results-to-4-year-follow-up-of-the-treatment-of-the-cervical-stenosis-by-corpectomy-titanium-mesh-cage-and-anterior-plate-fixation
#9
Alejandro Antonio Reyes Sánchez, Luis Alberto Gameros Castañeda, Claudia Obil Chavarría, Armando Alpizar Aguirre, Barón Zárate Kalfópulos, Luis Miguel Rosales-Olivares
BACKGROUND: Cervical spondylotic myelopathy is caused by cervical stenosis. Several techniques have been described for the treatment of multilevel disease, such as the anterior corpectomy with titanium mesh cage and anterior cervical plate placement, which has the advantage of performing a wider decompression and using the same bone as graft. However, it has caused controversy since the collapse of the mesh cage continues being a major limitation of this procedure. MATERIAL AND METHOD: A prospective 4-year follow-up study was conducted in 7 patients diagnosed with cervical stenosis, who were treated surgically by one level corpectomy with titanium mesh cage and anterior cervical plate placement, evaluating them by radiographs and clinical scales...
January 16, 2017: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/28103867/efficacy-of-teriparatide-in-the-treatment-of-nontraumatic-osteonecrosis-of-the-femoral-head-a-retrospective-comparative-study-with-alendronate
#10
Ryuta Arai, Daisuke Takahashi, Masahiro Inoue, Tohru Irie, Tsuyoshi Asano, Takuya Konno, Mohamad Alaa Terkawi, Tomohiro Onodera, Eiji Kondo, Norimasa Iwasaki
BACKGROUND: Collapse of the femoral head associated with nontraumatic osteonecrosis (NOFH) is one of the most common causes of disability in young adult patients. Excessive bone resorption by osteoclast coincident with the suppression of osteogenesis are believed to be responsible for collapse progression. Alendronate that inhibits bone resorption by inducing osteoclast apoptosis has been traditionally used for treating NOFH; however, several reports documented serious complications by the use of this drug...
January 19, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28103448/bedside-contribution-of-electrical-impedance-tomography-to-set-positive-end-expiratory-pressure-for-ecmo-treated-severe-ards-patients
#11
Guillaume Franchineau, Nicolas Bréchot, Guillaume Lebreton, Guillaume Hekimian, Ania Nieszkowska, Jean-Louis Trouillet, Pascal Leprince, Jean Chastre, Charles-Edouard Luyt, Alain Combes, Matthieu Schmidt
RATIONALE: Optimal positive end-expiratory pressure (PEEP) is unknown in severe acute respiratory distress syndrome (ARDS) patients on extracorporeal membrane oxygenation (ECMO) receiving mechanical ventilation with very low tidal volume. OBJECTIVES: To evaluate electrical impedance tomography's (EIT) ability to monitor a PEEP trial and to derive from EIT the best compromise PEEP in this setting. METHODS: A decremental PEEP trial (20-0 cmH2O) in 5 cmH2O steps was monitored by EIT, with lung images divided into four ventral-to-dorsal horizontal regions of interest...
January 19, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28103219/the-pharmacological-regulation-of-cellular-mitophagy
#12
Nikolaos D Georgakopoulos, Geoff Wells, Michelangelo Campanella
Small molecules are pharmacological tools of considerable value for dissecting complex biological processes and identifying potential therapeutic interventions. Recently, the cellular quality-control process of mitophagy has attracted considerable research interest; however, the limited availability of suitable chemical probes has restricted our understanding of the molecular mechanisms involved. Current approaches to initiate mitophagy include acute dissipation of the mitochondrial membrane potential (ΔΨm) by mitochondrial uncouplers (for example, FCCP/CCCP) and the use of antimycin A and oligomycin to impair respiration...
January 19, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28102979/changes-in-salivary-cortisol-during-psychotherapy-for-posttraumatic-stress-disorder-a-pilot-study-in-30-veterans
#13
Sheila A M Rauch, Anthony P King, Israel Liberzon, Rebecca K Sripada
BACKGROUND: Convergent evidence suggests that the hypothalamic-pituitary-adrenal (HPA) axis is disrupted in posttraumatic stress disorder (PTSD) and that HPA axis normalization may be associated with symptom improvement. Thus, the current study was designed to test the association between HPA axis reactivity and treatment response in psychotherapy for PTSD. METHODS: Thirty returning veterans with DSM-IV-TR PTSD were randomly assigned to receive 10 sessions of prolonged exposure therapy or present-centered therapy as part of a previously published randomized clinical trial (2008-2010)...
January 17, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28102946/a-portal-dosimetry-dose-prediction-method-based-on-collapsed-cone-algorithm-using-the-clinical-beam-model
#14
J Martínez Ortega, N Gómez González, P Castro Tejero, M Pinto Monedero, N B Tolani, L Núñez Martín, R Sánchez Montero
PURPOSE: Amorphous silicon electronical portal imaging devices (EPIDs) are widely used for dosimetric measurements in Radiation Therapy. The purpose of this work was to determine if a portal dose prediction method can be utilized for dose map calculations based on the linear accelerator model within a commercial treatment planning system (Pinnacle(3) v8.0 m). METHODS: The method was developed for a 6 MV photon beam on the Varian Clinac 21-EX, at a nominal dose rate of 400 MU/min...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102676/novel-antitumor-platinum-ii-conjugates-containing-the-nonsteroidal-anti-inflammatory-agent-diclofenac-synthesis-and-dual-mechanisms-of-antiproliferative-effects
#15
Francesco Paolo Intini, Juraj Zajac, Vojtech Novohradsky, Teresa Saltarella, Concetta Pacifico, Viktor Brabec, Giovanni Natile, Jana Kasparkova
One concept how to improve anticancer effects of conventional metallodrugs consists in conjugation of these compounds with other biologically (antitumor) active agents, acting by a different mechanism. Here, we present synthesis, biological effects, and mechanisms of action of new Pt(II) derivatives containing one or two nonsteroidal anti-inflammatory diclofenac (DCF) ligands also known for their antitumor effects. The antiproliferative properties of these metallic conjugates show that these compounds are potent and cancer cell selective cytotoxic agents exhibiting activity in cisplatin resistant and the COX-2 positive tumor cell lines...
January 19, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28101880/family-emergency-plan-and-preparedness-among-medical-practitioners-in-zaria-nigeria
#16
Jerry Godfrey Makama, Istifanus Anekoson Joshua, Elizabeth Jerry Makama
BACKGROUND: There has been an increase in the incidence of disasters in many parts of the world. Similarly, Nigeria has witnessed a recent increase of man-made disaster events such as plane crash, fire incidents, flood, and building collapse, including bomb blast orchestrated by terrorists that often create emergency situations. Therefore, the aim of the study was to evaluate family emergency plan and preparedness among medical practitioners in Zaria. METHODS: This was a cross-sectional descriptive study (May-July, 2013) of medical practitioners in Zaria, Nigeria...
November 2016: Journal of Emergency Management: JEM
https://www.readbyqxmd.com/read/28101459/venlafaxine-induced-cytotoxicity-towards-isolated-rat-hepatocytes-involves-oxidative-stress-and-mitochondrial-lysosomal-dysfunction
#17
Elham Ahmadian, Hossein Babaei, Alireza Mohajjel Nayebi, Aziz Eftekhari, Mohammad Ali Eghbal
Purpose: Depression is a public disorder worldwide. Despite the widespread use of venlafaxine in the treatment of depression, it has been associated with the incidence of toxicities. Hence, the goal of the current investigation was to evaluate the mechanisms of venlafaxine-induced cell death in the model of the freshly isolated rat hepatocytes. Methods: Collagenase-perfused rat hepatocytes were treated with venlafaxine and other agents. Cell damage, reactive oxygen species (ROS) formation, lipid peroxidation, mitochondrial membrane potential decline, lysosomal damage, glutathione (GSH) level were analyzed...
December 2016: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28101142/exploring-accessibility-of-pretreated-poplar-cell-walls-by-measuring-dynamics-of-fluorescent-probes
#18
Gabriel Paës, Anouck Habrant, Jordane Ossemond, Brigitte Chabbert
BACKGROUND: The lignocellulosic cell wall network is resistant to enzymatic degradation due to the complex chemical and structural features. Pretreatments are thus commonly used to overcome natural recalcitrance of lignocellulose. Characterization of their impact on architecture requires combinatory approaches. However, the accessibility of the lignocellulosic cell walls still needs further insights to provide relevant information. RESULTS: Poplar specimens were pretreated using different conditions...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28100827/insights-into-resource-consumption-cross-feeding-system-collapse-stability-and-biodiversity-from-an-artificial-ecosystem
#19
Yu Liu, David Sumpter
Community ecosystems at very different levels of biological organization often have similar properties. Coexistence of multiple species, cross-feeding, biodiversity and fluctuating population dynamics are just a few of the properties that arise in a range of ecological settings. Here we develop a bottom-up model of consumer-resource interactions, in the form of an artificial ecosystem 'number soup', which reflects basic properties of many bacterial and other community ecologies. We demonstrate four key properties of the number soup model: (i) communities self-organize so that all available resources are fully consumed; (ii) reciprocal cross-feeding is a common evolutionary outcome, which evolves in a number of stages, and many transitional species are involved; (iii) the evolved ecosystems are often 'robust yet fragile', with keystone species required to prevent the whole system from collapsing; (iv) non-equilibrium dynamics and chaotic patterns are general properties, readily generating rich biodiversity...
January 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28100056/pneumatosis-cystoides-intestinalis
#20
Adriana Fabiola Romano-Munive, Rafael Barreto-Zuñiga
A 54-year-old woman underwent colonoscopy for colon cancer screening. Colonoscopy showed multiple cysts in the sigmoid colon, with the largest being 4 cm in diameter. One of the cysts was biopsied. Cyst walls were observed; during biopsy, the gas was released and the cyst collapsed. Computed tomography of the abdomen confirmed a diagnosis of pneumatosis cystoides intestinalis. Pneumatosis cystoides intestinalis is a rare disease characterized by the presence in the intestinal submucosa or subserosa of multiple cysts filled with gas (nitrogen, oxygen, carbon dioxide and hydrogen)...
January 2017: Revista Española de Enfermedades Digestivas
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