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https://www.readbyqxmd.com/read/29778240/the-autonomic-neural-mechanism-of-right-ventricular-outflow-tract-tachycardia
#1
Hung-Yu Chang, Li-Wei Lo, Yu-Ruey Chen, Yu-Hui Chou, Wei-Lun Lin, Yenn-Jiang Lin, Wei-Hsian Yin, An-Ning Feng, Shih-Ann Chen
BACKGROUND: Ventricular tachycardia (VT) and ventricular premature complexes (VPCs) originating from the right ventricular outflow tract (RVOT) are generally considered as benign arrhythmias, with ECG morphology showing LBBB pattern and inferior axis. Pathogenic mechanisms in the genesis of RVOT VT/VPC remain largely unknown. We aimed to investigate the neural mechanism in RVOT ventricular arrhythmias in canine model. METHODS: Twelve mongrel dogs (13.7 ± 1...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29778048/pathogens-constancy-harbinger-of-nosocomial-infection-cum-identification-of-resistant-genes-and-drug-designing
#2
Sana Farooq Ahmad, Ibrar Khan, Abdul Wadood, Sadiq Azam, Noor Rehman, Muhammad Waqas, Kashif Bashir, Asaf Ali Khan
Hospitals are the most prominent places for the growth and spread of bacteria which are resistant to the available antibiotics. This antibiotic resistance is due to the over and misuse of antibiotic dosages of a high-density of patient population which are in frequent interaction with inanimate items of the hospitals and the consequent risk of cross infection. Out of 1010 samples of the current study, 510 (50.49%) were culture positive of which 329 (64.5%) were Gram-positive while 181 (35.49%) Gram negative...
April 22, 2018: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/29774116/human-papilloma-virus-global-research-architecture-assessed-by-density-equalizing-mapping
#3
Dörthe Brüggmann, Luise Kayser, Jenny Jaque, Matthias Bundschuh, Doris Klingelhöfer, David A Groneberg
Human papilloma virus (HPV) infection is linked to cervical cancer, which represents the world's fourth most common cancer in women. So far, no detailed map of the worldwide HPV research architecture has been constructed. Hence, this study focuses on the chronological development and geographical distribution of the global HPV-specific publications and evaluates citation-based parameters as well as socioeconomic features of the publishing countries. In total, 29,330 HPV-related publications were identified...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29773962/discovery-and-validation-of-genomic-regions-associated-with-resistance-to-maize-lethal-necrosis-in-four-biparental-populations
#4
Manje Gowda, Yoseph Beyene, Dan Makumbi, Kassa Semagn, Michael S Olsen, Jumbo M Bright, Biswanath Das, Stephen Mugo, L M Suresh, Boddupalli M Prasanna
In sub-Saharan Africa, maize is the key determinant of food security for smallholder farmers. The sudden outbreak of maize lethal necrosis (MLN) disease is seriously threatening the maize production in the region. Understanding the genetic basis of MLN resistance is crucial. In this study, we used four biparental populations applied linkage mapping and joint linkage mapping approaches to identify and validate the MLN resistance-associated genomic regions. All populations were genotyped with low to high density markers and phenotyped in multiple environments against MLN under artificial inoculation...
2018: Molecular Breeding: New Strategies in Plant Improvement
https://www.readbyqxmd.com/read/29773892/metabolite-cycled-density-weighted-concentric-rings-k-space-trajectory-dw-crt-enables-high-resolution-1-h-magnetic-resonance-spectroscopic-imaging-at-3-tesla
#5
Adam Steel, Mark Chiew, Peter Jezzard, Natalie L Voets, Puneet Plaha, Michael Albert Thomas, Charlotte J Stagg, Uzay E Emir
Magnetic resonance spectroscopic imaging (MRSI) is a promising technique in both experimental and clinical settings. However, to date, MRSI has been hampered by prohibitively long acquisition times and artifacts caused by subject motion and hardware-related frequency drift. In the present study, we demonstrate that density weighted concentric ring trajectory (DW-CRT) k-space sampling in combination with semi-LASER excitation and metabolite-cycling enables high-resolution MRSI data to be rapidly acquired at 3 Tesla...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772875/measuring-high-density-built-environment-for-public-health-research-uncertainty-with-respect-to-data-indicator-design-and-spatial-scale
#6
Guibo Sun, Chris Webster, Michael Y Ni, Xiaohu Zhang
Uncertainty with respect to built environment (BE) data collection, measure conceptualization and spatial scales is evident in urban health research, but most findings are from relatively lowdensity contexts. We selected Hong Kong, an iconic high-density city, as the study area as limited research has been conducted on uncertainty in such areas. We used geocoded home addresses (n=5732) from a large population-based cohort in Hong Kong to extract BE measures for the participants' place of residence based on an internationally recognized BE framework...
May 7, 2018: Geospatial Health
https://www.readbyqxmd.com/read/29772066/3d-specific-absorption-rate-estimation-from-high-intensity-focused-ultrasound-sonications-using-the-green-s-function-heat-kernel
#7
Nicholas J Freeman, Henrik Odéen, Dennis L Parker
PURPOSE: Evaluate a numerical inverse Green's function method of deriving specific absorption rates (SARs) from high intensity focused ultrasound (HIFU) sonications given tissue parameters (thermal conductivity, specific heat capacity, and mass density) and 3-D magnetic resonance imaging (MRI) temperature measurements. METHODS: SAR estimates were evaluated using simulations and MR temperature measurements from HIFU sonications. For simulations, a "true" SAR was calculated using the hybrid angular spectrum method for ultrasound simulations...
May 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29771936/assigning-crystallographic-electron-densities-with-free-energy-calculations-the-case-of-the-fluoride-channel-fluc
#8
Igor Ariz-Extreme, Jochen S Hub
Approximately 90% of the structures in the Protein Data Bank (PDB) were obtained by X-ray crystallography or electron microscopy. Whereas the overall quality of structure is considered high, thanks to a wide range of tools for structure validation, uncertainties may arise from density maps of small molecules, such as organic ligands, ions or water, which are non-covalently bound to the biomolecules. Even with some experience and chemical intuition, the assignment of such disconnected electron densities is often far from obvious...
2018: PloS One
https://www.readbyqxmd.com/read/29770515/structural-variation-and-rates-of-genome-evolution-in-the-grass-family-seen-through-comparison-of-sequences-of-genomes-greatly-differing-in-size
#9
Jan Dvorak, Le Wang, Tingting Zhu, Chad M Jorgensen, Karin R Deal, Xiongtao Dai, Matthew W Dawson, Hans-Georg Müller, Ming-Cheng Luo, Ramesh K Ramasamy, Hamid Dehghani, Yong Q Gu, Bikram S Gill, Assaf Distelfeld, Katrien M Devos, Peng Qi, Frank M You, Patrick J Gulick, Patrick E McGuire
Homology was searched with genes annotated in the Aegilops tauschii pseudomolecules against genes annotated in the pseudomolecules of tetraploid wild emmer wheat, Brachypodium distachyon, sorghum, and rice. Similar searches were initiated with genes annotated in the rice pseudomolecules. Matrices of colinear genes and rearrangements in their order were constructed. Optical Bionano genome maps were constructed and used to validate rearrangements unique to the wild emmer and Ae. tauschii genomes. Most common rearrangements were short paracentric inversions and short intrachromosomal translocations...
May 16, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29768413/wild-boar-mapping-using-population-density-statistics-from-polygons-to-high-resolution-raster-maps
#10
Claudia Pittiglio, Sergei Khomenko, Daniel Beltran-Alcrudo
The wild boar is an important crop raider as well as a reservoir and agent of spread of swine diseases. Due to increasing densities and expanding ranges worldwide, the related economic losses in livestock and agricultural sectors are significant and on the rise. Its management and control would strongly benefit from accurate and detailed spatial information on species distribution and abundance, which are often available only for small areas. Data are commonly available at aggregated administrative units with little or no information about the distribution of the species within the unit...
2018: PloS One
https://www.readbyqxmd.com/read/29767631/finite-temperature-stress-calculations-in-atomic-models-using-moments-of-position
#11
Ranganathan Parthasarathy, Anil Misra, Lizhi Ouyang
Continuum modeling of finite temperature mechanical behavior of atomic systems requires refined description of atomic motions. In this paper, we identify additional kinematical quantities that are relevant for a more accurate continuum description as the system is subjected to step-wise loading. The presented formalism avoids the necessity for atomic trajectory mapping with deformation, provides the definitions of the kinematic variables and their conjugates in real space, and simplifies local work conjugacy...
May 16, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29766371/landsat-phenological-metrics-and-their-relation-to-aboveground-carbon-in-the-brazilian-savanna
#12
M Schwieder, P J Leitão, J R R Pinto, A M C Teixeira, F Pedroni, M Sanchez, M M Bustamante, P Hostert
BACKGROUND: The quantification and spatially explicit mapping of carbon stocks in terrestrial ecosystems is important to better understand the global carbon cycle and to monitor and report change processes, especially in the context of international policy mechanisms such as REDD+ or the implementation of Nationally Determined Contributions (NDCs) and the UN Sustainable Development Goals (SDGs). Especially in heterogeneous ecosystems, such as Savannas, accurate carbon quantifications are still lacking, where highly variable vegetation densities occur and a strong seasonality hinders consistent data acquisition...
May 15, 2018: Carbon Balance and Management
https://www.readbyqxmd.com/read/29763867/shiga-toxigenic-escherichia-coli-incidence-is-related-to-small-area-variation-in-cattle-density-in-a-region-in-ireland
#13
C Brehony, J Cullinan, M Cormican, D Morris
Shiga toxigenic Escherichia coli (STEC) are pathogenic E. coli that cause infectious diarrhoea. In some cases infection may be complicated by renal failure and death. The incidence of human infection with STEC in Ireland is the highest in Europe. The objective of the study was to examine the spatial incidence of human STEC infection in a region of Ireland with significantly higher rates of STEC incidence than the national average and to identify possible risk factors of STEC incidence at area level. Anonymised laboratory records (n = 379) from 2009 to 2015 were obtained from laboratories serving three counties in the West of Ireland...
May 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29762621/ni-core-cuo-shell-fibers-produced-by-electrospinning-and-electroplating-as-efficient-photocathode-materials-for-solar-water-splitting
#14
Hong-Seok Jo, Min-Woo Kim, Bhavana Joshi, Edmund Samuel, Hyun Yoon, Mark T Swihart, Sam S Yoon
Charge recombination in CuO photocathodes inhibits efficient electron flow and limits the photo-electrochemical performance of these cathodes for solar water splitting. To circumvent this shortcoming, we introduce highly conductive Ni/CuO core-shell structured fibers. The photocurrent density (PCD) achieved with these core-shell fibers exceeded that of fibers without a Ni core by a factor of 2.6. The PCD enhancement arises from increased acceptor concentration and electron-hole recombination time, as measured by electrochemical impedance spectroscopy...
May 15, 2018: Nanoscale
https://www.readbyqxmd.com/read/29759439/high-density-electroanatomical-mapping-to-identify-point-of-epicardial-to-endocardial-breakthrough-in-perimitral-flutter
#15
Markus B Sikkel, Vishal Luther, Arunashis Sau, Fernando Guerrero, Fu Siong Ng, Phang Boon Lim
No abstract text is available yet for this article.
June 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29758908/spatial-relationships-among-cereal-yields-and-selected-soil-physical-and-chemical-properties
#16
Jerzy Lipiec, Bogusław Usowicz
Sandy soils occupy large area in Poland (about 50%) and in the world. This study aimed at determining spatial relationships of cereal yields and the selected soil physical and chemical properties in three study years (2001-2003) on low productive sandy Podzol soil (Podlasie, Poland). The yields and soil properties in plough and subsoil layers were determined at 72-150 points. The test crops were: wheat, wheat and barley mixture and oats. To explore the spatial relationship between cereal yields and each soil property spatial statistics was used...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29756200/ablation-of-symptomatic-ventricular-tachycardia-after-surgical-correction-of-ventricular-septal-defect-in-childhood-using-high-density-mapping-how-precise-is-ensite-precision
#17
Maciej Wójcik, Łukasz Konarski, Piotr Aljabali, Przemysław Zając, Robert Błaszczyk
No abstract text is available yet for this article.
2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29755944/intra-atrial-reentrant-tachycardia-originating-from-the-pulmonary-vein-cuff-anastomosis-in-a-lung-transplantation-patient-ultra-high-density-3-dimensional-mapping
#18
Jae-Sun Uhm, Moo Suk Park, Boyoung Joung, Hui-Nam Pak, Hyo Chae Paik, Moon-Hyoung Lee
No abstract text is available yet for this article.
April 2018: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/29755503/genome-wide-association-analysis-of-age-dependent-egg-weights-in-chickens
#19
Zhuang Liu, Congjiao Sun, Yiyuan Yan, Guangqi Li, Guiqin Wu, Aiqiao Liu, Ning Yang
Egg weight (EW) is an economically-important trait and displays a consecutive increase with the hen's age. Because extremely large eggs cause a range of problems in the poultry industry, we performed a genome-wide association study (GWAS) in order to identify genomic variations that are associated with EW. We utilized the Affymetrix 600 K high density SNP array in a population of 1,078 hens at seven time points from day at first egg to 80 weeks age (EW80). Results reveal that a 90 Kb genomic region (169.42 Mb ~ 169...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29754826/atomic-resolution-cryo-em-structure-of-%C3%AE-galactosidase
#20
Alberto Bartesaghi, Cecilia Aguerrebere, Veronica Falconieri, Soojay Banerjee, Lesley A Earl, Xing Zhu, Nikolaus Grigorieff, Jacqueline L S Milne, Guillermo Sapiro, Xiongwu Wu, Sriram Subramaniam
The advent of direct electron detectors has enabled the routine use of single-particle cryo-electron microscopy (EM) approaches to determine structures of a variety of protein complexes at near-atomic resolution. Here, we report the development of methods to account for local variations in defocus and beam-induced drift, and the implementation of a data-driven dose compensation scheme that significantly improves the extraction of high-resolution information recorded during exposure of the specimen to the electron beam...
April 30, 2018: Structure
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