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https://www.readbyqxmd.com/read/28434669/diurnal-variation-of-co2-ch4-and-n2o-emission-fluxes-continuously-monitored-in-situ-in-three-environmental-habitats-in-a-subtropical-estuarine-wetland
#1
Wen-Bin Yang, Chung-Shin Yuan, Chuan Tong, Pin Yang, Lei Yang, Bang-Qin Huang
Wetlands play a crucial role in modulating atmospheric concentrations of greenhouse gases (GHGs) such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). The key factors controlling GHG emission from subtropical estuarine wetlands were investigated in this study, which continuously monitored the uptake/emission of GHGs (CO2, CH4, and N2O) by/from a subtropical estuarine wetland located in the Minjiang estuary in the coastal region of southeastern China. A self-designed floating chamber was used to collect air samples on-site at three environmental habitats (Phragmites australis marsh, mudflats, and river water)...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28434541/phytoliths-indicate-significant-arboreal-cover-at-sahelanthropus-type-locality-tm266-in-northern-chad-and-a-decrease-in-later-sites
#2
Alice Novello, Doris Barboni, Florence Sylvestre, Anne-Elisabeth Lebatard, Christine Paillès, Didier L Bourlès, Andossa Likius, Hassane Taisso Mackaye, Patrick Vignaud, Michel Brunet
We analyzed phytolith and diatom remains preserved at 45 Miocene and Pliocene localities dated between 8 and 1 Ma in northern Chad (16-17°N). Some of these localities yielded cranial remains, lower jaws, and teeth of the hominin species Australopithecus bahrelghazali (∼3.6 Ma) and Sahelanthropus tchadensis (∼7 Ma). Of the 111 sediment samples analyzed, 41 yielded phytoliths, 20 yielded diatoms, and seven yielded both phytoliths and diatoms. Freshwater planktonic and tychoplanktonic diatom species, indicative of lacustrine conditions, are dominant (>91%) in the samples...
May 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28433765/geochemical-processes-controlling-the-distribution-and-concentration-of-metals-in-soils-from-a-patagonian-argentina-salt-marsh-affected-by-mining-residues
#3
Yanina L Idaszkin, María Del Pilar Alvarez, Eleonora Carol
Heavy metal pollution that affects salt marshes is a major environmental concern due to its toxic nature, persistence, and potential risk to organisms and to human health. Mining waste deposits originated four decades ago, by the metallurgical extraction of heavy metals, are found near to the San Antonio salt marsh in Patagonia. The aim of the work was to determine the geochemical processes that control the distribution and concentration of Cu, Fe, Pb and Zn in the soils of this Patagonian salt marsh. A survey of the mining waste deposits was carried out where three dumps were identified...
April 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28433524/an-analysis-of-knowledge-based-planning-for-stereotactic-body-radiation-therapy-of-the-spine
#4
Joseph J Foy, Robin Marsh, Randall K Ten Haken, Kelly C Younge, Matthew Schipper, Yilun Sun, Dawn Owen, Martha M Matuszak
PURPOSE: Planning for spine stereotactic body radiation therapy (SBRT) is time consuming, and differences in planner experience and technique result in discrepancies in plan quality between facilities. Here, knowledge-based planning is analyzed to determine if it may be effective in improving the quality and efficiency of spine SBRT planning. MATERIALS AND METHODS: Thirty-eight spine SBRT cases were collected from the University of Michigan database and inverse planned to deliver 3 10-Gy fractions to the planning target volume (PTV)...
March 2, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28431960/nomenclature-for-factors-of-the-hla-system-update-march-2017
#5
Steven G E Marsh
No abstract text is available yet for this article.
April 18, 2017: Human Immunology
https://www.readbyqxmd.com/read/28431959/nomenclature-for-factors-of-the-hla-system-update-february-2017
#6
Steven G E Marsh
No abstract text is available yet for this article.
April 18, 2017: Human Immunology
https://www.readbyqxmd.com/read/28431958/nomenclature-for-factors-of-the-hla-system-update-january-2017
#7
G E Steven
No abstract text is available yet for this article.
April 18, 2017: Human Immunology
https://www.readbyqxmd.com/read/28429975/the-real-cost-of-training-health-professionals-in-australia-it-costs-as-much-to-build-a-dietician-workforce-as-a-dental-workforce
#8
Leonie Segal, Claire Marsh, Rob Heyes
Objectives We explored the real cost of training the workforce in a range of primary health care professions in Australia with a focus on the impact of retention to contribute to the debate on how best to achieve the optimal health workforce mix. Methods The cost to train an entry-level health professional across 12 disciplines was derived from university fees, payment for clinical placements and, where relevant, cost of internship, adjusted for student drop-out. Census data were used to identify the number of qualified professionals working in their profession over a working life and to model expected years of practice by discipline...
April 2017: Journal of Health Services Research & Policy
https://www.readbyqxmd.com/read/28429381/the-structural-connectome-of-children-with-traumatic-brain-injury
#9
Marsh Königs, L W Ernest van Heurn, Roel Bakx, R Jeroen Vermeulen, J Carel Goslings, Bwee Tien Poll-The, Marleen van der Wees, Coriene E Catsman-Berrevoets, Jaap Oosterlaan, Petra J W Pouwels
This study aimed to investigate the impact of mild to severe pediatric TBI on the structural connectome. Children aged 8-14 years with trauma control (TC) injury (n = 27) were compared to children with mild TBI and risk factors for complicated TBI (mild(RF+) , n = 20) or moderate/severe TBI (n = 16) at 2.8 years post-injury. Probabilistic tractography on diffusion tensor imaging data was used in combination with graph theory to study structural connectivity. Functional outcome was measured using neurocognitive tests and parent and teacher questionnaires for behavioral functioning...
April 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28426964/ipsc-derived-human-microglia-like-cells-to-study-neurological-diseases
#10
Edsel M Abud, Ricardo N Ramirez, Eric S Martinez, Luke M Healy, Cecilia H H Nguyen, Sean A Newman, Andriy V Yeromin, Vanessa M Scarfone, Samuel E Marsh, Cristhian Fimbres, Chad A Caraway, Gianna M Fote, Abdullah M Madany, Anshu Agrawal, Rakez Kayed, Karen H Gylys, Michael D Cahalan, Brian J Cummings, Jack P Antel, Ali Mortazavi, Monica J Carson, Wayne W Poon, Mathew Blurton-Jones
Microglia play critical roles in brain development, homeostasis, and neurological disorders. Here, we report that human microglial-like cells (iMGLs) can be differentiated from iPSCs to study their function in neurological diseases, like Alzheimer's disease (AD). We find that iMGLs develop in vitro similarly to microglia in vivo, and whole-transcriptome analysis demonstrates that they are highly similar to cultured adult and fetal human microglia. Functional assessment of iMGLs reveals that they secrete cytokines in response to inflammatory stimuli, migrate and undergo calcium transients, and robustly phagocytose CNS substrates...
April 19, 2017: Neuron
https://www.readbyqxmd.com/read/28424208/architecture-of-the-rat-nephron-arterial-network-analysis-with-micro-computed-tomography
#11
Donald J Marsh, Dmitry D Postnov, Douglas Rowland, Anthony S Wexler, Olga V Sosnovtseva, Niels-Henrik Holstein-Rathlou
Among solid organs the kidney's vascular network stands out because each nephron has 2 distinct capillary structures in series, and because tubuloglomerular feedback (TGF), one of the mechanisms responsible for blood flow autoregulation, is specific to renal tubules. TGF and the myogenic mechanism, acting jointly, autoregulate single nephron blood flow. Each generates a self-sustained periodic oscillation and an oscillating electrical signal that propagates upstream along arterioles. Similar electrical signals from other nephrons interact, allowing nephron synchronization...
April 19, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28423417/multi-species-mating-disruption-in-cranberries-ericales-ericaceae-early-evidence-using-a-flowable-emulsion
#12
Shawn A Steffan, Elissa M Chasen, Annie E Deutsch, Agenor Mafra-Neto
Pheromone-based mating disruption has proven to be a powerful pest management tactic in many cropping systems. However, in the cranberry system, a viable mating disruption program does not yet exist. There are commercially available pheromones for several of the major pests of cranberries, including the cranberry fruitworm, Acrobasis vaccinii Riley (Lepidoptera: Pyralidae) and blackheaded fireworm, Rhopobota naevana (Hübner) (Lepidoptera: Tortricidae). Previous studies have shown that mating disruption represents a promising approach for R...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28422916/beware-of-the-interval-cholecystectomy
#13
James Ackerman, Ryan Abegglen, Mark Scaife, Andrew Peitzman, Matthew Rosengart, Wallis Marsh, Kurt Stahlfeld
BACKGROUND *: Despite limited data regarding the indications and effectiveness of percutaneous cholecystostomy (PC) in the treatment of acute cholecystitis (AC), usage has increased by over 500% since 1994. Many of these patients subsequently undergo interval cholecystectomy (IC), a procedure that has not been rigorously evaluated. This aim of this study was to quantify the morbidity and mortality associated with the IC. METHODS *: We included all consecutive adult patients (>18 years old) who underwent PC and IC from January 2008 to December 2013...
April 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28419493/distribution-of-the-tick-dermacentor-reticulatus-in-the-united-kingdom
#14
J M Medlock, K M Hansford, A G C Vaux, B Cull, S Abdullah, M E Pietzsch, R Wall, N Johnson, L P Phipps
The recent implication of Dermacentor reticulatus (Ixodida: Ixodidae) in the transmission of canine babesiosis in the U.K. has highlighted the lack of accurate published data on its distribution in this country. This paper aims to collate and appraise historical data for D. reticulatus, to supplement such data with more recent surveillance data and to report on field sampling conducted during 2009-2016. These updated data facilitate better understanding of the current distribution of this tick in the U.K., which will better inform disease risk assessments...
April 17, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28418218/regulation-of-salt-marsh-mosquito-populations-by-the-18-6-year-lunar-nodal-cycle
#15
Ilia Rochlin, James T Morris
The 18.6-year lunar-nodal cycle drives changes in tidal amplitude globally, affecting coastal habitat formation, species and communities inhabiting rocky shores, and salt marsh vegetation. However, the cycle's influence on salt marsh fauna lacked sufficient long-term data for testing its effect. We circumvented this problem by using salt marsh mosquito records obtained over a period of over four decades in two estuaries in the northeastern USA. Salt marsh mosquito habitat is near the highest tide level where the impact of the nodal cycle on flood frequency is greatest...
April 18, 2017: Ecology
https://www.readbyqxmd.com/read/28418192/detection-of-potentially-novel-paramyxovirus-and-coronavirus-viral-rna-in-bats-and-rats-in-the-mekong-delta-region-of-southern-viet-nam
#16
A Berto, P H Anh, J J Carrique-Mas, P Simmonds, N Van Cuong, N T Tue, N Van Dung, M E Woolhouse, I Smith, G A Marsh, J E Bryant, G E Thwaites, S Baker, M A Rabaa
Bats and rodents are being increasingly recognized as reservoirs of emerging zoonotic viruses. Various studies have investigated bat viruses in tropical regions, but to date there are no data regarding viruses with zoonotic potential that circulate in bat and rat populations in Viet Nam. To address this paucity of data, we sampled three bat farms and three wet markets trading in rat meat in the Mekong Delta region of southern Viet Nam. Faecal and urine samples were screened for the presence of RNA from paramyxoviruses, coronaviruses and filoviruses...
April 18, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28418098/stress-and-subsidy-effects-of-seagrass-wrack-duration-frequency-and-magnitude-on-salt-marsh-community-structure
#17
Torrance C Hanley, David L Kimbro, A Randall Hughes
Environmental perturbations can strongly affect community processes and ecosystem functions by acting primarily as a subsidy that increases productivity, a stress that decreases productivity, or both, with the predominant effect potentially shifting from subsidy to stress as the overall intensity of the perturbation increases. While perturbations are often considered along a single axis of intensity, they consist of multiple components (e.g., magnitude, frequency, and duration) that may not have equivalent stress and/or subsidy effects...
April 18, 2017: Ecology
https://www.readbyqxmd.com/read/28416680/using-microsecond-single-molecule-fret-to-determine-the-assembly-pathways-of-t4-ssdna-binding-protein-onto-model-dna-replication-forks
#18
Carey Phelps, Brett Israels, Davis Jose, Morgan C Marsh, Peter H von Hippel, Andrew H Marcus
DNA replication is a core biological process that occurs in prokaryotic cells at high speeds (∼1 nucleotide residue added per millisecond) and with high fidelity (fewer than one misincorporation event per 10(7) nucleotide additions). The ssDNA binding protein [gene product 32 (gp32)] of the T4 bacteriophage is a central integrating component of the replication complex that must continuously bind to and unbind from transiently exposed template strands during DNA synthesis. We here report microsecond single-molecule FRET (smFRET) measurements on Cy3/Cy5-labeled primer-template (p/t) DNA constructs in the presence of gp32...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28411373/impact-of-major-vascular-resection-on-outcomes-and-survival-in-patients-with-intrahepatic-cholangiocarcinoma-a-multi-institutional-analysis
#19
Bradley N Reames, Aslam Ejaz, Bas Groot Koerkamp, Sorin Alexandrescu, Hugo P Marques, Luca Aldrighetti, Shishir K Maithel, Carlo Pulitano, Todd W Bauer, Feng Shen, George A Poultsides, Guillaume Martel, James Wallis Marsh, Timothy M Pawlik
BACKGROUND: Major vascular involvement (IVC or portal vein) for intrahepatic cholangiocarcinoma (ICC) has traditionally been considered a contraindication to resection. We sought to define perioperative outcomes and survival of ICC patients undergoing hepatectomy with major vascular resection in a large international multi-institutional database. METHODS: A total of 1087 ICC patients who underwent curative-intent hepatectomy between 1990 and 2016 were identified from 13 institutions...
April 15, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28409970/observation-of-betatron-x-ray-radiation-in-a-self-modulated-laser-wakefield-accelerator-driven-with-picosecond-laser-pulses
#20
F Albert, N Lemos, J L Shaw, B B Pollock, C Goyon, W Schumaker, A M Saunders, K A Marsh, A Pak, J E Ralph, J L Martins, L D Amorim, R W Falcone, S H Glenzer, J D Moody, C Joshi
We investigate a new regime for betatron x-ray emission that utilizes kilojoule-class picosecond lasers to drive wakes in plasmas. When such laser pulses with intensities of ∼5×10^{18}  W/cm^{2} are focused into plasmas with electron densities of ∼1×10^{19}  cm^{-3}, they undergo self-modulation and channeling, which accelerates electrons up to 200 MeV energies and causes those electrons to emit x rays. The measured x-ray spectra are fit with a synchrotron spectrum with a critical energy of 10-20 keV, and 2D particle-in-cell simulations were used to model the acceleration and radiation of the electrons in our experimental conditions...
March 31, 2017: Physical Review Letters
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