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Bowen Yao, Salvatore Mandrà, John O Curry, Shamil Shaikhutdinov, Hans-Joachim Freund, Joshua Schrier
Membrane-based gas separation processes can address key challenges in energy and environment, but for many applications the permeance and selectivity of bulk membranes is insufficient for economical use. Theory and experiment indicate that permeance and selectivity can be increased by using two-dimensional materials with subnanometer pores as membranes. Motivated by experiments showing selective permeation of H2/CO mixtures through amorphous silica bilayers, here we perform a theoretical study of gas separation through silica bilayers...
November 20, 2017: ACS Applied Materials & Interfaces
Clàudia Garrido, Genís Cardona, Josep L Güell, Jaume Pujol
PURPOSE: A single-center, cross-sectional study was designed to assess and compare objective and subjective quality of vision of patients intervened with penetrating keratoplasty (PK), deep anterior lamellar keratoplasty (DALK) and Descemet membrane endothelial keratoplasty (DMEK). METHODS: Forty-six patients previously intervened with PK (22 eyes), DALK (7 eyes) and DMEK (17 eyes) were recruited. Visual evaluation included spherical and cylindrical refraction, distance corrected visual acuity (DCVA), photopic contrast sensitivity (CS), optical quality, measured with the HD Analyzer (objective scattering index [OSI], MTF cut-off and Strehl ratio), and ocular and corneal aberrometry, measured with the KR-1W Wavefront Analyzer...
November 13, 2017: Journal of Optometry
Sergey V Ryazantsev, Daniil A Tyurin, Vladimir I Feldman, Leonid Khriachtchev
We report on the preparation and vibrational characterization of the C2H3⋯CO2 complex, the first example of a stable intermolecular complex involving vinyl radicals. This complex was prepared in Ar and Kr matrices using UV photolysis of propiolic acid (HC3OOH) and subsequent thermal mobilization of H atoms. This preparation procedure provides vinyl radicals formed exclusively as a complex with CO2, without the presence of either CO2 or C2H3 monomers. The absorption bands corresponding to the ν5(C2H3), ν7(C2H3), ν8(C2H3), ν2(CO2), and ν3(CO2) modes of the C2H3⋯CO2 complex were detected experimentally...
November 14, 2017: Journal of Chemical Physics
J Han, M C Heaven, P J Moran, G A Pitz, E M Guild, C R Sanderson, B Hokr
Optically pumped rare gas lasers are being investigated as potential high-energy, high beam quality systems. The lasing medium consists of rare gas atoms (Rg=Ne, Ar, Kr, or Xe) that have been electric discharge excited to the metastable np(5)(n+1)s P32 state. Following optical excitation, helium (He) at pressures of 200-1000 Torr is used as the energy transfer agent to create a population inversion. The primary technical difficulty for this scheme is the discharge production of sufficient Rg* metastables in the presence of >200  Torr of He...
November 15, 2017: Optics Letters
Kenji Okitsu, Itsuya Kurisaka, Ben Nanzai, Norimichi Takenaka, Hiroshi Bandow
The effect of the type of C3-C6 alcohol, solution temperature, and dissolved gas on the rate of Au(III) reduction was investigated in NaAuCl4 aqueous alcohol solution with a 200-kHz ultrasound irradiation system. It was confirmed in the presence of C3-C6 alcohol that more highly hydrophobic alcohols more effectively accumulated at the argon bubble interface region, and the reducing radicals formed here. To avoid changes in the bubble temperature during collapsing bubble, the effects of the solution temperature on the rate of Au(III) reduction and on the rate of formation of the gaseous compounds (CO, CO2, CH4, C2H2, C2H4, C2H6) were investigated in the presence of low concentration (1...
March 2018: Ultrasonics Sonochemistry
Yifei Zhang, Alexander V Alekseyenko
The diversity of microbiota is best explored by understanding the phylogenetic structure of the microbial communities. Traditionally, sequence alignment has been used for phylogenetic inference. However, alignment-based approaches come with significant challenges and limitations when massive amounts of data are analyzed. In the recent decade, alignment-free approaches have enabled genome-scale phylogenetic inference. Here we evaluate three alignment-free methods: ACS, CVTree, and Kr for phylogenetic inference with 16s rRNA gene data...
2017: PloS One
Anne Felsberg, J Ole Ross, Clemens Schlosser, Gerald Kirchner
Due to its half-life, chemical inertness and low solubility in water, radioactive (85)Kr is a valuable tracer for testing the performance of atmospheric dispersion models in simulating long-range transport of pollutants. This paper evaluates the capability of simulating the dispersion of radiokrypton emitted by a nuclear fuel reprocessing plant in north-west France. Three time periods during which elevated activity concentrations of (85)Kr in ground level air were detected in south-west Germany are chosen. Simulations have been performed using the HYSPLIT code and the European Centre for Median-Range Weather Forecasts (ECMWF) data base...
November 9, 2017: Journal of Environmental Radioactivity
Minjeong Kim, Jai-Hoon Kim, Kangseok Kim, Sunshin Kim
Motivation: With the discovery of cell-free fetal DNA in maternal blood, the demand for non-invasive prenatal testing (NIPT) has been increasing. To obtain reliable NIPT results, it is important to accurately estimate the fetal fraction. In this study, we propose an accurate and cost-effective method for measuring fetal fractions using single-nucleotide polymorphisms (SNPs). Results: A total of 84 samples were sequenced via semiconductor sequencing using a 0.3x sequencing coverage...
November 8, 2017: Bioinformatics
J L Szalma, T N Daly, G W L Teo, G M Hancock, P A Hancock
The capacity for superior vigilance can be trained by using knowledge of results (KR). Ourpresent experiments demonstrate the efficacy of such training using a first-person perspective movement videogame-based platform in samples ofstudents and Soldiers.Effectiveness was assessedby manipulating KR during a training phase and withdrawing it in a subsequent transfer phase. Relative to a no KR control condition, KR systematically improved performance for both Soldiers and students. These results build upon our previous findings that demonstrated that a video game-based platform can be used to create a movement-centered sustained attention task with important elements of traditional vigilance...
November 10, 2017: Ergonomics
Jonathan Ra Phillips, Beverley Hopwood, Rowenna Stroud, Paul A Dieppe, Andrew D Toms
Background: The aims of this study were to characterise the pain experienced by patients with chronic pain after knee replacement (KR), in whom no apparent 'orthopaedic' problem could be identified, and to establish how many have pain sensitisation problems (including neuropathic pain). Methods: A total of 44 patients were prospectively evaluated at a multidisciplinary tertiary referral clinic by an orthopaedic surgeon, pain specialist, rheumatologist and physiotherapist...
November 2017: British Journal of Pain
Mei G Lei, Ravi Kr Gupta, Chia Y Lee
The matrix proteins of Staphylococcus aureus biofilm have not been well defined. Previous efforts to identify these proteins were performed using in vitro systems. Here we use a proteomic approach to identify biofilm matrix proteins directly from infected bone implants using a rat model of orthopedic implant-associated S. aureus infection. Despite heavy presence of host proteins, a total of 28 and 105 S. aureus proteins were identified during acute infection and chronic infection, respectively. Our results show that biofilm matrix contains mostly intracellular cytoplasmic proteins and, to a much less extent, extracellular and cell surface-associated proteins...
2017: PloS One
Thatipamula R Prasad, Siji Joseph, Prashant Kole, Anoop Kumar, Murali Subramanian, Sudha Rajagopalan, Prabhakar Kr
AIM: Objective of the current work was to develop a 'green chemistry' compliant selective and sensitive supercritical fluid chromatography-tandem mass spectrometry method for simultaneous estimation of risperidone (RIS) and its chiral metabolites in rat plasma. Methodology & results: Agilent 1260 Infinity analytical supercritical fluid chromatography system resolved RIS and its chiral metabolites within runtime of 6 min using a gradient chromatography method. Using a simple protein precipitation sample preparation followed by mass spectrometric detection achieved a sensitivity of 0...
November 9, 2017: Bioanalysis
Mohammad Sedigh Jasour, Liane Wagner, Ulrik Kræmer Sundekilde, Bodil K Larsen, Ines Greco, Vibeke Orlien, Karsten Olsen, Hanne T Rasmussen, Niels H Hjermitslev, Marianne Hammershøj, Anne J T Dalsgaard, Trine Kastrup Dalsgaard
The effect of partially replacing fishmeal in aquafeed with feathermeal (FTH) at three levels (0%: FTH0, 8%: FTH8, 24%: FTH24) and two extrusion temperatures (100 and 130 °C) were evaluated in rainbow trout (Oncorhynchus mykiss) with respect to growth performance, metabolism response, and oxidative status of the feed proteins. Multivariate data analyses revealed that FTH24 correlated positively with high levels of: oxidation products, amino acids (AA) racemization, glucogenic AAs level in liver, feed intake (FI), specific growth rate (SGR), and feed conversion ratio (FCR); and low AAs digestibility...
November 9, 2017: Journal of Agricultural and Food Chemistry
Qiangqiang Jia, Suning Liu, Di Wen, Yongxu Cheng, William G Bendena, Jian Wang, Sheng Li
Tissue remodeling is a crucial process in animal development and disease progression. Coordinately controlled by the two main insect hormones, juvenile hormone (JH) and 20-hydroxyecdysone (20E), tissues are remodeled context-specifically during insect metamorphosis. We previously discovered that two matrix metalloproteinases (Mmps) cooperatively induce fat body cell dissociation in Drosophila. However, the molecular events involved in this Mmps-mediated dissociation are unclear. Here we report that JH and 20E coordinately and precisely control the developmental timing of Mmps-induced fat body cell dissociation...
November 8, 2017: Journal of Biological Chemistry
Sooyeoun You, Hye-Jin Moon, So Young Do, Yun-Kwok Wing, Jun-Sang Sunwoo, Ki-Young Jung, Yong Won Cho
STUDY OBJECTIVES: REM sleep behavior disorder (RBD) is a parasomnia that is commonly associated with neurodegenerative disorders. We aimed to validate the Hong Kong version of the self-reported RBD questionnaire (RBDQ-HK) with the Korean version (RBDQ-KR) and to investigate its clinical usefulness. METHODS: One-hundred five patients with RBD and 105 age- and sex-matched controls were enrolled. Thirty were randomly selected for a retest with the questionnaire after 2 to 4 weeks without any treatment...
November 1, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
Eudoxie Dulary, Shin-Yi Yu, Marine Houdou, Geoffroy de Bettignies, Valérie Decool, Sven Potelle, Sandrine Duvet, Marie-Ange Krzewinski-Recchi, Anne Garat, Gert Matthijs, Yann Guerardel, François Foulquier
The Golgi ion homeostasis is tightly regulated to ensure essential cellular processes such as glycosylation, yet our understanding of this regulation remains incomplete. Gdt1p is a member of the conserved Uncharacterized Protein Family (UPF0016). Our previous work suggested that Gdt1p may function in the Golgi by regulating Golgi Ca(2+)/Mn(2+) homeostasis. NMR structural analysis of the polymannan chains isolated from yeasts showed that the gdt1Δ mutant cultured in presence of high Ca(2+) concentration, as well as the pmr1Δ and gdt1Δ/pmr1Δ strains presented strong late Golgi glycosylation defects with a lack of α-1,2 mannoses substitution and α-1,3 mannoses termination...
November 3, 2017: Biochimica et Biophysica Acta
Su Min Ha, Hye Shin Ahn, Jung Hwan Baek, Hwa Young Ahn, Yun Jae Chung, Bo Youn Cho, Sung Bin Park
BACKGROUND: To minimize potential harm from overuse of fine-needle aspiration, Thyroid Imaging Reporting and Data Systems (TIRADSs) were developed for thyroid nodule risk stratification. The purpose of this study was to perform validation of three scoring risk stratification models for thyroid nodules using ultrasonography features, a web-based malignancy risk stratification system at website ( and those developed by the Korean Society of Thyroid Radiology (KSThR) and the American College of Radiology (ACR)...
November 6, 2017: Thyroid: Official Journal of the American Thyroid Association
Dongchan Yang, Insu Jang, Jinhyuk Choi, Min-Seo Kim, Andrew J Lee, Hyunwoong Kim, Junghyun Eom, Dongsup Kim, Inkyung Jung, Byungwook Lee
Three-dimensional (3D) chromatin structure is an emerging paradigm for understanding gene regulation mechanisms. Hi-C (high-throughput chromatin conformation capture), a method to detect long-range chromatin interactions, allows extensive genome-wide investigation of 3D chromatin structure. However, broad application of Hi-C data have been hindered by the level of complexity in processing Hi-C data and the large size of raw sequencing data. In order to overcome these limitations, we constructed a database named 3DIV (a 3D-genome Interaction Viewer and database) that provides a list of long-range chromatin interaction partners for the queried locus with genomic and epigenomic annotations...
November 2, 2017: Nucleic Acids Research
Daejin Hyung, Jihyun Kim, Soo Young Cho, Charny Park
Alternative splicing confers the human genome complexity by increasing the diversity of expressed mRNAs. Hundreds or thousands of splicing regions have been identified through differential alternative splicing analysis of high-throughput datasets. However, it is hard to explain the functional impact of each splicing event. Protein domain formation and nonsense-mediated decay are considered the main functional features of splicing. However, other functional features such as miRNA target sites, phosphorylation sites and single-nucleotide variations are directly affected by alternative splicing and affect downstream function...
November 2, 2017: Nucleic Acids Research
Der-You Kao, Kushantha Withanage, Torsten Hahn, Javaria Batool, Jens Kortus, Koblar Jackson
In the Fermi-Löwdin orbital method for implementing self-interaction corrections (FLO-SIC) in density functional theory (DFT), the local orbitals used to make the corrections are generated in a unitary-invariant scheme via the choice of the Fermi orbital descriptors (FODs). These are M positions in 3-d space (for an M-electron system) that can be loosely thought of as classical electron positions. The orbitals that minimize the DFT energy including the SIC are obtained by finding optimal positions for the FODs...
October 28, 2017: Journal of Chemical Physics
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