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https://www.readbyqxmd.com/read/29149755/a-randomized-clinical-trial-of-adjunctive-ketamine-anesthesia-in-electro-convulsive-therapy-for-depression
#1
Minling Zhang, Robert Rosenheck, Xiaoming Lin, Qirong Li, Yanling Zhou, Yunshan Xiao, Xiong Huang, Ni Fan, Hongbo He
BACKGROUND: Electroconvulsive therapy (ECT) is a rapid acting and effective treatment for both major depressive disorder (MDD) and bipolar disorder (BP). Both propofol and ketamine are commonly used anesthetic agents but recent clinical studies suggest that ketamine has rapid-acting antidepressant properties, itself, at sub-anesthetic doses. METHODS: A total of 77 inpatients (41 MDD and 36 BP) were randomly assigned to receive ECT with propofol (1mg/kg) anesthesia or with ketamine (0...
November 10, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29149741/the-isolated-posterior-malleolar-fracture-and-syndesmotic-instability-a-case-report-and-review-of-the-literature
#2
Diederik P J Smeeing, Roderick M Houwert, Moyo C Kruyt, Falco Hietbrink
INTRODUCTION: Ankle fractures are among the most common type of fractures in the lower extremity. A posterior malleolar fracture is frequently part of a more complex ankle fracture and only in rare cases it occurs as isolated injury. Posterior malleolar fractures often occur with associated injuries, such as a Maisonneuve fracture or with bi- or trimalleolar ligamentous injuries. Knowledge about these associated injuries is essential to prevent missed diagnoses. The aim of this article is to describe the isolated posterior malleolar fracture, the possible associated injuries, the diagnostic work-up and therapeutic consequences...
November 13, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29149694/a-high-brightness-probe-of-polymer-nanoparticles-for-biological-imaging
#3
Sirong Zhou, Jiarong Zhu, Yaping Li, Liheng Feng
Conjugated polymer nanoparticles (CPNs) with high brightness in long wavelength region were prepared by the nano-precipitation method. Based on fluorescence resonance energy transfer (FRET) mechanism, the high brightness property of the CPNs was realized by four different emission polymers. Dynamic light scattering (DLS) and scanning electron microscopy (SEM) displayed that the CPNs possessed a spherical structure and an average diameter of ~75nm. Analysis assays showed that the CPNs had excellent biocompatibility, good photostability and low cytotoxicity...
November 11, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29149674/the-impact-of-operational-strategies-on-the-performance-of-a-photo-ebpr-system
#4
V C F Carvalho, E B Freitas, P J Silva, J C Fradinho, M A M Reis, A Oehmen
A novel Phototrophic - Enhanced Biological Phosphorus Removal (Photo-EBPR) system, consisting of a consortium of photosynthetic organisms and polyphosphate accumulating organisms (PAOs), was studied in this work. A sequencing batch reactor was fed with a mixture of acetate and propionate (75%-25%) and subjected to dark/light cycles in order to select a photo-EBPR system containing PAOs and photosynthetic organisms, the latter likely providers of oxygen to the system. The results from the selection period (stage 1) showed that the photo-EBPR culture was capable of performing P release in the dark and P uptake in the presence of light, under limited oxygen concentrations...
November 4, 2017: Water Research
https://www.readbyqxmd.com/read/29149673/the-feasibility-of-nanofiltration-membrane-bioreactor-nf-mbr-reverse-osmosis-ro-process-for-water-reclamation-comparison-with-ultrafiltration-membrane-bioreactor-uf-mbr-ro-process
#5
Ming Feng Tay, Chang Liu, Emile R Cornelissen, Bing Wu, Tzyy Haur Chong
This study examines the feasibility of a novel nanofiltration membrane bioreactor (NF-MBR) followed by reverse osmosis (RO) process for water reclamation at 90% recovery and using an ultrafiltration MBR (UF-MBR)+RO as baseline for comparison. Both MBRs adopted the same external hollow fiber membrane configurations and operating conditions. The collected permeates of the MBRs were subsequently fed to the respective RO systems. The results showed that the NF-MBR (operated at a constant flux of 10 L/m(2)h) achieved superior MBR permeate quality due to enhanced biodegradation and high rejection capacity of the NF membrane, leading to lower RO fouling rates (∼3...
November 7, 2017: Water Research
https://www.readbyqxmd.com/read/29149659/validation-of-differential-cross-sections-by-means-of-252-cf-spectral-averaged-cross-sections
#6
Martin Schulc, Michal Košťál, Stanislav Simakov, Vojtěch Rypar, Davit Harutyunyan, Jan Šimon, Nicola Burianová, Evžen Novák, Bohumil Jánský, Martin Mareček, Jan Uhlíř
The results of systematic evaluations of the spectrum-averaged cross section measurements performed in the spontaneous fission (252)Cf neutron field are presented. The Following threshold reactions were investigated: (23)Na(n,2n)(22)Na, (54)Fe(n,p)(54)Mn, (54)Fe(n,α) (51)Cr, (27)Al(n,p)(27)Mg, (27)Al(n,α)(24)Na, (19)F(n,2n)(18)F, (90)Zr(n,2n)(89)Zr and (89)Y(n,2n)(88)Y. The spectrum-averaged cross sections for (23)Na(n,2n)(22)Na, (54)Fe(n,α)(51)Cr and (89)Y(n,2n)(88)Y reactions were measured for the first time...
November 8, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29149637/antiviral-potential-of-natural-compounds-against-influenza-virus-hemagglutinin
#7
S Kannan, P Kolandaivel
Influenza virus of different subtypes H1N1, H2N2, H3N2 and H5N1 cause many human pandemic deaths and threatening the people worldwide. The Hemagglutinin (HA) protein mediates viral attachment to host receptors act as an attractive target. The sixteen natural compounds have been chosen to target the HA protein. Molecular docking studies have been performed to find binding affinity of the compounds. Out of the sixteen, three compounds CI, CII and CIII found to posses a higher binding affinity. The molecular dynamics (MD) simulation has been performed to study the structural, dynamical properties for the nine different complexes CI, CII, CIII bound with H1, H2, H3 proteins and the results were compared...
November 4, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/29149569/blue-thermally-activated-delayed-fluorescence-polymers-with-nonconjugated-backbone-and-through-space-charge-transfer-effect
#8
Shiyang Shao, Jun Hu, Xingdong Wang, Lixiang Wang, Xiabin Jing, Fosong Wang
We demonstrate a novel molecular design concept for thermally activated delayed fluorescence (TADF) polymers based on a nonconjugated polyethylene backbone with through-space charge transfer effect between pendant electron donor (D) and electron acceptor (A) units. Different from conventional conjugated D-A polymers with through-bond charge transfer effect, the nonconjugated architecture avoids the direct conjugation between D and A units, enabling us to realize blue emission. Meanwhile, the spatial π-π interaction between the physically separated D and A units results in both small singlet-triplet energy splitting (0...
November 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29149560/the-extended-zinc-amber-force-field-ezaff
#9
Zhuoqin Yu, Pengfei Li, Kenneth M Merz
An empirical approach based on the previously developed zinc AMBER force field (ZAFF) is proposed for the determination of the parameters for bonds and angles involving zinc. We call it the extended ZAFF (EZAFF) model because the original ZAFF model was only formulated for 4-coordinated systems, while EZAFF additionally can tackle 5- and 6-coordinated systems. Tests were carried out for 6 metalloproteins and 5 organometallic compounds with different coordination spheres. Results validated the reliability of the current model to handle a variety of zinc containing complexes...
November 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29149556/evaluating-force-field-london-dispersion-coefficients-using-the-exchange-hole-dipole-moment-model
#10
Mohamad Mohebifar, Erin R Johnson, Christopher N Rowley
London dispersion interactions play an integral role in materials science and biophysics. Force fields for atomistic molecular simulations typically represent dispersion interactions by the 12-6 Lennard-Jones potential, using empirically-determined parameters. These parameters are generally underdetermined and there is no straightforward way to test if they are physically realistic. Alternatively, the exchange-hole dipole moment (XDM) model from density-functional theory predicts atomic and molecular London dispersion coefficients from first principles, providing an innovative strategy to validate the dispersion terms of molecular-mechanical force fields...
November 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29149555/mapping-the-reactions-in-a-single-zero-valent-iron-nanoparticle
#11
Lan Ling, Xiao-Yue Huang, Meirong Li, Wei-Xian Zhang
Nanoscale zero-valent iron (nZVI) posseses unique functionalities for metal-metalloid removal and sequestration. So far, direct evidence on the heavy metal-iron reactions in the solid phase is still limited due to low concentration of heavy metals and small size of nanoparticles. In this work, angstrom-resolution spectral mappings on the reactions of nZVI with chromate, arsenate, nickel, silver, cesium, and zinc ions are presented. This work was achieved with spherical aberration-corrected scanning transmission electron microscopy integrated with high-sensitivity X-ray energy-dispersive spectroscopy scanning transmission electron microscopy (XEDS-STEM)...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29149546/the-photophysical-and-photoacoustic-properties-of-quadrupolar-borondifluoride-curcuminoid-dyes
#12
Stephanie Bellinger, Maryam Hatamimoslehabadi, Seema Bag, Farha Mithila, Jeffrey La, Mathieu Frennete, Samir Laoui, David Szalda, Chandra Yelleswarapu, Jonathan Rochford
The synthesis and characterization of a series of donor-π-acceptor-π-donor (D-A-D) curcuminoid molecules are here presented incorporating π-extended aryl and electron-donating amino terminal functionalization. Computational evaluation shows these molecules possess quadrupolar character with the lowest energy transitions displaying high molar extinction coefficients with broad tunability through manipulation of terminal donating groups. Consistent with their quadrupolar nature, these molecules show varying degrees of solvatochromic behavior in both their absorption and emission spectra which has been analyzed by Lippert-Mataga and Kamlet-Taft analysis...
November 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29149539/dynamic-cross-exchange-in-halophosphonium-species-first-direct-observation-of-stereochemical-inversion-in-the-course-of-an-sn2-process
#13
Kirill Nikitin, Elizabeth V Jennings, Sulaiman Al Sulaimi, Yannick Ortin, Declan G Gilheany
The complex fluxional interconversions between, otherwise very similar, phosphonium bromides and chlorides R3PX+X- (R = Alk, Ar, X = Cl or Br) was studied by NMR techniques. Their energy barriers are typically ca. 11 kcal/mol but rise rapidly as bulky groups are attached to phosphorus, revealing the importance of steric factors. In contrast, electronic effects, as measured by Hammett analysis, are modest (rho 1.46) but still clearly indicate negative charge flow towards phosphorus in the transition state. Most significantly, detailed analysis of the exchange pathways unequivocally, and for the first time in any such process, shows that nucleophilic attack of the nucleophilic anion on the tetrahedral centre results in inversion of configuration...
November 17, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29149471/polyaniline-derived-n-doped-carbon-coated-cobalt-phosphide-nanoparticles-deposited-on-n-doped-graphene-as-an-efficient-electrocatalyst-for-hydrogen-evolution-reaction
#14
Jingwen Ma, Min Wang, Guangyu Lei, Guoliang Zhang, Fengbao Zhang, Wenchao Peng, Xiaobin Fan, Yang Li
The development of highly efficient and durable non-noble metal electrocatalysts for the hydrogen evolution reaction (HER) is significant for clean and renewable energy research. This work reports the synthesis of N-doped graphene nanosheets supported N-doped carbon coated cobalt phosphide (CoP) nanoparticles via a pyrolysis and a subsequent phosphating process by using polyaniline. The obtained electrocatalyst exhibits excellent electrochemical activity for HER with a small overpotential of -135 mV at 10 mA cm(-2) and a low Tafel slope of 59...
November 17, 2017: Small
https://www.readbyqxmd.com/read/29149444/morphology-molecular-structure-and-stable-carbon-isotopic-composition-of-black-carbon-bc-in-urban-topsoils
#15
Yutong Zong, Qing Xiao, Shenggao Lu
Urban soils contain significant amounts of black carbon (BC) from biomass and fossil fuel combustion and regard to be a pool of BC. BC in urban soils has multiple effects on environmental processes in urban system, such as global climate change, air quality, and public health. Urban topsoil samples (0-10 cm) were collected from Anshan, Liaoning Province, northeast China, which is one of the most important old steel industrial bases in China. The BC in urban topsoils was extracted using the density method. Their chemical composition, morphology, molecular structure, and stable carbon isotopic composition were examined using elemental analysis, scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and stable carbon isotope (δ(13)C)...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29149423/structural-and-visible-near%C3%A2-infrared-optical-properties-of-cr-doped-tio2-for-colored-cool-pigments
#16
Le Yuan, Xiaolong Weng, Ming Zhou, Qingyong Zhang, Longjiang Deng
Chromium-doped TiO2 pigments were synthesized via a solid-state reaction method and studied with X-ray diffraction, SEM, XPS, and UV-VIS-NIR reflectance spectroscopy. The incorporation of Cr(3+) accelerates the transition from the anatase phase to the rutile phase and compresses the crystal lattice. Moreover, the particle morphology, energy gap, and reflectance spectrum of Cr-doped TiO2 pigments is affected by the crystal structure and doping concentration. For the rutile samples, some of the Cr(3+) ions are oxidized to Cr(4+) after sintering at a high temperature, which leads to a strong near-infrared absorption band due to the (3)A2 → (3) T1 electric dipole-allowed transitions of Cr(4+)...
November 17, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29149386/glucose-metabolism-in-pediatric-traumatic-brain-injury
#17
Mayumi L Prins
Traumatic brain injury is the number one cause of death and disability among the pediatric population in the USA. The heterogeneity of the pediatric population is reflected by both the normal cerebral maturation and the age differences in the causes of TBI, which generate unique age-related pathophysiology responses and recovery profiles. This review will address the normal changes in cerebral glucose metabolism throughout developmental phases and how TBI alters glucose metabolism. Evidence has shown that TBI disrupts the biochemical processing of glucose to energy...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29149273/the-efficacy-and-safety-of-bronchial-thermoplasty-in-severe-persistent-asthma-on-extended-follow-up
#18
A O'Reilly, I Browne, D Watchorn, J J Egan, S Lane
Background: Asthma is a common condition and there remains a subset of patients who are poorly controlled on maximal therapy. Bronchial thermoplasty is a bronchoscopic therapy using radio frequency energy to reduce airway smooth muscle which has been shown to improve asthma control although further evidence regarding long term efficacy and safety is required. Aim: We aimed to demonstrate safety and efficacy of bronchial thermoplasty on extended follow up. Our initial experience with this group was previously reported in 2016 where patients were shown to have a significant improvement in Asthma Control Test (ACT) scores 1 year post treatment8...
November 15, 2017: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29149230/light-enhanced-energy-storage-ability-through-a-hybrid-plasmonic-ag-nanowire-decorated-hydroxide-skin-structure
#19
Liuyang Zhang, Diwen Shi, Tang Jiao Huang, Ruizhe Huang, Hao Gong
By decorating nickel copper hydroxide (NCH) with Ag nanowires (Ag NWs), a 1.7 fold enhancement in areal capacitance (5.4 F cm(-2)) and a 1.8 fold increment in gravimetric capacitance (3182 F g(-1)) under light illumination were achieved. The improved supercapacitor performances of the composites under visible-light illumination were demonstrated and a reasonable explanation for this newly-discovered phenomenon was proposed. The plasmonic effect of Ag NWs was demonstrated by hot-electron generation. The decorated Ag NWs served as a stimulus for redox reactions...
November 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/29149213/optimal-design-and-control-of-an-electromechanical-transfemoral-prosthesis-with-energy-regeneration
#20
Farbod Rohani, Hanz Richter, Antonie J van den Bogert
In this paper, we present the design of an electromechanical above-knee active prosthesis with energy storage and regeneration. The system consists of geared knee and ankle motors, parallel springs for each motor, an ultracapacitor, and controllable four-quadrant power converters. The goal is to maximize the performance of the system by finding optimal controls and design parameters. A model of the system dynamics was developed, and used to solve a combined trajectory and design optimization problem. The objectives of the optimization were to minimize tracking error relative to human joint motions, as well as energy use...
2017: PloS One
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