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https://www.readbyqxmd.com/read/29668018/how-strong-was-the-bottleneck-associated-to-the-peopling-of-the-americas-new-insights-from-multilocus-sequence-data
#1
Nelson J R Fagundes, Alice Tagliani-Ribeiro, Rohina Rubicz, Larissa Tarskaia, Michael H Crawford, Francisco M Salzano, Sandro L Bonatto
In spite of many genetic studies that contributed for a deep knowledge about the peopling of the Americas, no consensus has emerged about important parameters such as the effective size of the Native Americans founder population. Previous estimates based on genomic datasets may have been biased by the use of admixed individuals from Latino populations, while other recent studies using samples from Native American individuals relied on approximated analytical approaches. In this study we use resequencing data for nine independent regions in a set of Native American and Siberian individuals and a full-likelihood approach based on isolation-with-migration scenarios accounting for recent flow between Asian and Native American populations...
2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29668011/effective-population-size-and-the-genetic-consequences-of-commercial-whaling-on-the-humpback-whales-megaptera-novaeangliae-from-southwestern-atlantic-ocean
#2
Ana Lúcia Cypriano-Souza, Tiago Ferraz da Silva, Márcia H Engel, Sandro L Bonatto
Genotypes of 10 microsatellite loci of 420 humpback whales from the Southwestern Atlantic Ocean population were used to estimate for the first time its contemporary effective (Ne) and census (Nc) population sizes and to test the genetic effect of commercial whaling. The results are in agreement with our previous studies that found high genetic diversity for this breeding population. Using an approximate Bayesian computation approach, the scenario of constant Ne was significantly supported over scenarios with moderate to strong size changes during the commercial whaling period...
2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29667786/frailty-phenotypes-and-mortality-after-lung-transplantation-a-prospective-cohort-study
#3
Jonathan P Singer, Joshua M Diamond, Michaela R Anderson, Patricia P Katz, Ken Covinsky, Michelle Oyster, Tatiana Blue, Allison Soong, Laurel Kalman, Pavan Shrestha, Selim M Arcasoy, John R Greenland, Lori Shah, Jasleen Kukreja, Nancy P Blumenthal, Imaani Easthausen, Jeffrey A Golden, Amika McBurnie, Ed Cantu, Joshua Sonett, Steven Hays, Hilary Robbins, Kashif Raza, Matthew Bacchetta, Rupal J Shah, Frank D'Ovidio, Aida Venado, Jason D Christie, David J Lederer
Frailty is associated with increased mortality among lung transplant candidates. We sought to determine the association between frailty, as measured by the Short Physical Performance Battery (SPPB) and mortality after lung transplantation. In a multicenter prospective cohort study of adults who underwent lung transplantation, pre-operative frailty was assessed with the SPPB (n=318) and, in a secondary analysis, the Fried Frailty Phenotype (FFP; n=299). We tested the association between pre-operative frailty and mortality following lung transplantation with propensity score adjusted Cox models...
April 18, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29667682/modeling-the-free-radical-polymerization-of-hexanediol-diacrylate-hdda-a-molecular-dynamics-and-graph-theory-approach
#4
Ariana Torres-Knoop, Ivan Kryven, Verena Schamboeck, Piet D Iedema
In the printing, coating and ink industries, photocurable systems are becoming increasingly popular and multi-functional acrylates are one of the most commonly used monomers due to their high reactivity (fast curing). In this paper, we use molecular dynamics and graph theory tools to investigate the thermo-mechanical properties and topology of hexanediol diacrylate (HDDA) polymer networks. The gel point was determined as the point where a giant component was formed. For the conditions of our simulations, we found the gel point to be around 0...
April 18, 2018: Soft Matter
https://www.readbyqxmd.com/read/29667600/is-eye-lens-dosimetry-needed-in-nuclear-medicine
#5
Malgorzata Wrzesien, Leszek Krolicki, Lukasz Albiniak, Jerzy Olszewski
INTRODUCTION: The specificity of personnel exposure, which distinguishes nuclear medicine, is associated with the form of the radiation source used, and this often requires performing manual procedures while using radioactive isotopes. The variety of radionuclides and medical procedures, and the yearly increase in the number of patients, as well as the change of the individual dose limit for the lens of the eye from a value of 150 mSv per year to a level of 20 mSv, means that issues of eye lens routine dosimetry become interesting from the radiation protection point of view...
April 18, 2018: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/29667359/predicting-responses-to-mechanical-ventilation-for-preterm-infants-with-acute-respiratory-illness-using-artificial-neural-networks
#6
Katharine Brigham, Samir Gupta, John C Brigham
Infants born prematurely are particularly susceptible to respiratory illness due to underdeveloped lungs, which can often result in fatality. Preterm infants in acute stages of respiratory illness typically require mechanical ventilation assistance, and the efficacy of the type of mechanical ventilation and its delivery has been the subject of a number clinical studies. With recent advances in machine learning approaches, particularly deep learning, it may be possible to estimate future responses to mechanical ventilation in real-time, based on ventilation monitoring up to the point of analysis...
April 17, 2018: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29667117/ecg-derived-respiration-based-on-iterated-hilbert-transform-and-hilbert-vibration-decomposition
#7
Hemant Sharma, K K Sharma
Monitoring of the respiration using the electrocardiogram (ECG) is desirable for the simultaneous study of cardiac activities and the respiration in the aspects of comfort, mobility, and cost of the healthcare system. This paper proposes a new approach for deriving the respiration from single-lead ECG based on the iterated Hilbert transform (IHT) and the Hilbert vibration decomposition (HVD). The ECG signal is first decomposed into the multicomponent sinusoidal signals using the IHT technique. Afterward, the lower order amplitude components obtained from the IHT are filtered using the HVD to extract the respiration information...
April 17, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29667034/thermal-comfort-along-the-marathon-course-of-the-2020-tokyo-olympics
#8
Tsuyoshi Honjo, Yuhwan Seo, Yudai Yamasaki, Nobumitsu Tsunematsu, Hitoshi Yokoyama, Hiroaki Yamato, Takehiko Mikami
The Olympic Games will be held in Tokyo in 2020 and the period will be the hottest period of the year in Japan. Marathon is a sport with a large heat load, and it is said that the risk of heat stroke rises more than other sports activities. The thermal environment of the 2020 Tokyo Olympic marathon course is analyzed by using wet-bulb globe temperature (WBGT) and Universal Thermal Climate Index (UTCI) map of the center area of Tokyo. The change due to the place, the effect of the shadow of the building, and the position on the course was analyzed from the distribution of WBGT and UTCI in the short-term analysis of sunny day from August 2 to August 6, 2014...
April 17, 2018: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29666999/post-mortem-chemical-excitability-of-the-iris-should-not-be-used-for-forensic-death-time-diagnosis
#9
Katja Koehler, Susanne Sehner, Martin Riemer, Axel Gehl, Tobias Raupach, Sven Anders
Post-mortem chemical excitability of the iris is one of the non-temperature-based methods in forensic diagnosis of the time since death. Although several authors reported on their findings, using different measurement methods, currently used time limits are based on a single dissertation which has recently been doubted to be applicable for forensic purpose. We investigated changes in pupil-iris ratio after application of acetylcholine (n = 79) or tropicamide (n = 58) and in controls at upper and lower time limits that are suggested in the current literature, using a digital photography-based measurement method with excellent reliability...
April 18, 2018: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29666773/estimating-intraspecific-genetic-diversity-from-community-dna-metabarcoding-data
#10
Vasco Elbrecht, Ecaterina Edith Vamos, Dirk Steinke, Florian Leese
Background: DNA metabarcoding is used to generate species composition data for entire communities. However, sequencing errors in high-throughput sequencing instruments are fairly common, usually requiring reads to be clustered into operational taxonomic units (OTUs), losing information on intraspecific diversity in the process. While Cytochrome c oxidase subunit I (COI) haplotype information is limited in resolving intraspecific diversity it is nevertheless often useful e.g. in a phylogeographic context, helping to formulate hypotheses on taxon distribution and dispersal...
2018: PeerJ
https://www.readbyqxmd.com/read/29666716/survival-after-cardiac-arrest-secondary-to-massive-pulmonary-embolism
#11
Abdullah E Laher, Muhammed Moolla, Feroza Motara, Fathima Paruk, Guy Richards
Introduction: It is estimated that the diagnosis of pulmonary embolism (PE) is missed in as many as 84% of all cases of PE. Cardiac arrest following PE is generally associated with poor outcomes. Case Report: A 43-year-old man presented to the Emergency Department (ED) in cardiac arrest. Swelling of his right lower limb was noted on arrival. Point of care ultrasound was performed during ongoing cardiopulmonary resuscitation (CPR) and showed a thrombus in the right iliofemoral vein as well as dilatation of the right ventricle...
2018: Case Reports in Emergency Medicine
https://www.readbyqxmd.com/read/29666611/genome-sequence-assembly-and-characterization-of-two-metschnikowia-fructicola-strains-used-as-biocontrol-agents-of-postharvest-diseases
#12
Edoardo Piombo, Noa Sela, Michael Wisniewski, Maria Hoffmann, Maria L Gullino, Marc W Allard, Elena Levin, Davide Spadaro, Samir Droby
The yeast Metschnikowia fructicola was reported as an efficient biological control agent of postharvest diseases of fruits and vegetables, and it is the bases of the commercial formulated product "Shemer." Several mechanisms of action by which M. fructicola inhibits postharvest pathogens were suggested including iron-binding compounds, induction of defense signaling genes, production of fungal cell wall degrading enzymes and relatively high amounts of superoxide anions. We assembled the whole genome sequence of two strains of M...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29666237/goamazon2014-5-campaign-points-to-deep-inflow-approach-to-deep-convection-across-scales
#13
Kathleen A Schiro, Fiaz Ahmed, Scott E Giangrande, J David Neelin
A substantial fraction of precipitation is associated with mesoscale convective systems (MCSs), which are currently poorly represented in climate models. Convective parameterizations are highly sensitive to the assumptions of an entraining plume model, in which high equivalent potential temperature air from the boundary layer is modified via turbulent entrainment. Here we show, using multiinstrument evidence from the Green Ocean Amazon field campaign (2014-2015; GoAmazon2014/5), that an empirically constrained weighting for inflow of environmental air based on radar wind profiler estimates of vertical velocity and mass flux yields a strong relationship between resulting buoyancy measures and precipitation statistics...
April 17, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29665803/plasmodium-vivax-and-plasmodium-falciparum-infection-dynamics-re-infections-recrudescences-and-relapses
#14
Michael T White, Stephan Karl, Cristian Koepfli, Rhea J Longley, Natalie E Hofmann, Rahel Wampfler, Ingrid Felger, Tom Smith, Wang Nguitragool, Jetsumon Sattabongkot, Leanne Robinson, Azra Ghani, Ivo Mueller
BACKGROUND: In malaria endemic populations, complex patterns of Plasmodium vivax and Plasmodium falciparum blood-stage infection dynamics may be observed. Genotyping samples from longitudinal cohort studies for merozoite surface protein (msp) variants increases the information available in the data, allowing multiple infecting parasite clones in a single individual to be identified. msp genotyped samples from two longitudinal cohorts in Papua New Guinea (PNG) and Thailand were analysed using a statistical model where the times of acquisition and clearance of each clone in every individual were estimated using a process of data augmentation...
April 17, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29665705/topogram-based-tube-current-modulation-of-head-computed-tomography-for-optimizing-image-quality-while-protecting-the-eye-lens-with-shielding
#15
Ming-Fang Lin, Chia-Yuen Chen, Yuan-Hao Lee, Chia-Wei Li, Leo E Gerweck, Hao Wang, Wing P Chan
Background Multiple rounds of head computed tomography (CT) scans increase the risk of radiation-induced lens opacification. Purpose To investigate the effects of CT eye shielding and topogram-based tube current modulation (TCM) on the radiation dose received by the lens and the image quality of nasal and periorbital imaging. Material and Methods An anthropomorphic phantom was CT-scanned using either automatic tube current modulation or a fixed tube current. The lens radiation dose was estimated using cropped Gafchromic films irradiated with or without a shield over the orbit...
January 1, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/29665640/chemical-characterization-and-source-apportionment-of-aerosol-over-mid-brahmaputra-valley-india
#16
Pranamika Bhuyan, Pratibha Deka, Amit Prakash, S Balachandran, Raza Rafiqul Hoque
Aerosol samples (as PM10, n = 250) were collected from three rural/remote receptor locations in the mid Brahmaputra plain region and were chemically characterized for metals (Al, Fe, Co, Cu, Cr, Cd, Mn, Ni, Pb), ions (Ca2+ , Mg2+ , Na+ , K+ , NH4 + , F- , Cl- , NO3 - , SO4 2- ), and carbon. Vital ratios like NO3 - /SO4 2- , EC/OC, K+ /EC, K+ /OC, enrichment factors and inter-species correlations were exploited to appreciate possible sources of aerosol. These empirical analyses pointed towards anthropogenic contributions of aerosol, particularly from biomass burning, vehicular emission, and road dust...
March 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29665637/variability-of-pm10-in-industrialized-urban-areas-new-coefficients-to-establish-significant-differences-between-sampling-points
#17
A B Vicente, P Juan, S Meseguer, C Díaz-Avalos, L Serra
One of the main problems that arise in the assessment of air quality in an area is to estimate the number of representative sampling points of each microenvironment within it. We present a new model that reduces the variability and increases the quality of the comparison of the sampling points. The study is based on the comparison between a city in eastern Spain, Vila-real, a macro city in México, Monterrey and the Piemonte region regarding the assessment of PM10 in microenvironments. Vila-real is located in the province of Castellón...
March 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29665467/influence-of-task-instructions-and-stimuli-on-the-neural-network-of-face-processing-an-ale-meta-analysis
#18
Veronika I Müller, Yvonne Höhner, Simon B Eickhoff
Many neuroimaging studies have investigated the neural correlates of face processing. However, the location of face-preferential regions differs considerably between studies, possibly due to the use of different stimuli or tasks. By using Activation likelihood estimation meta-analyses, we aimed to a) delineate regions consistently involved in face processing and b) to assess the influence of stimuli and task on convergence of activation patterns. In total, we included 77 neuroimaging experiments in healthy subjects comparing face processing to a control condition...
March 22, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29665180/does-the-earned-income-tax-credit-increase-children-s-weight-the-impact-of-policy-driven-income-on-childhood-obesity
#19
Young Jo
I exploit substantial increases in the earned income tax credit to study how a policy-driven change in family income affects childhood obesity. Using the National Longitudinal Survey of Youth 1979, my difference-in-differences estimates indicate that the probability of being obese increased by 3 percentage points among children whose families experienced a greater income shock. A further investigation suggests that a reduction in maternal time with children played a greater role in children's weight gain than income...
April 17, 2018: Health Economics
https://www.readbyqxmd.com/read/29664908/a-new-model-of-wheezing-severity-in-young-children-using-the-validated-isaac-wheezing-module-a-latent-variable-approach-with-validation-in-independent-cohorts
#20
Steven M Brunwasser, Tebeb Gebretsadik, Diane R Gold, Kedir N Turi, Cosby A Stone, Soma Datta, James E Gern, Tina V Hartert
BACKGROUND: The International Study of Asthma and Allergies in Children (ISAAC) Wheezing Module is commonly used to characterize pediatric asthma in epidemiological studies, including nearly all airway cohorts participating in the Environmental Influences on Child Health Outcomes (ECHO) consortium. However, there is no consensus model for operationalizing wheezing severity with this instrument in explanatory research studies. Severity is typically measured using coarsely-defined categorical variables, reducing power and potentially underestimating etiological associations...
2018: PloS One
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