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https://www.readbyqxmd.com/read/28549168/assessing-the-thermal-dissipation-sap-flux-density-method-for-monitoring-cold-season-water-transport-in-seasonally-snow-covered-forests
#1
Allison M Chan, David R Bowling
Productivity of conifers in seasonally snow-covered forests is high before and during snowmelt when environmental conditions are optimal for photosynthesis. Climate change is altering the timing of spring in many locations, and changes in the date of transition from winter dormancy can have large impacts on annual productivity. Sap flow methods provide a promising approach to monitor tree activity during the cold season and the winter-spring and fall-winter transitions. Although sap flow techniques have been widely used, cold season results are generally not reported...
May 26, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28548046/large-area-snow-like-mose2-monolayers-synthesis-growth-mechanism-and-efficient-electrocatalyst-application
#2
JingWen Huang, Huiqiang Liu, Bo Jin, Min Liu, Qingchun Zhang, Liqiong Luo, Shijin Chu, Sheng Chu, Rufang Peng
This study explores the large-area synthesis of controllable morphology, uniform, and high-quality monolayer. MoSe2 is essential for its potential application in optoelectronics, photocatalysis, and renewable energy sources. In this study, we successfully synthesized snow-like MoSe2 monolayers using a simple chemical vapor deposition method. Results reveal that snow-like MoSe2 is a single crystal with a hexagonal structure, a thickness of ~0.9 nm, and a lateral dimension of up to 20 μm. The peak position of the photoluminescence spectra is ~1...
May 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28544898/aerosol-and-snow-transfer-processes-an-investigation-on-the-behavior-of-water-soluble-organic-compounds-and-ionic-species
#3
Elena Barbaro, Roberta Zangrando, Sara Padoan, Ornela Karroca, Giuseppa Toscano, Warren R L Cairns, Carlo Barbante, Andrea Gambaro
The concentrations of water-soluble compounds (ions, carboxylic acids, amino acids, sugars, phenolic compounds) in aerosol and snow have been determined at the coastal Italian base "Mario Zucchelli" (Antarctica) during the 2014-2015 austral summer. The main aim of this research was to investigate the air-snow transfer processes of a number of classes of chemical compounds and investigate their potential as tracers for specific sources. The composition and particle size distribution of Antarctic aerosol was measured, and water-soluble compounds accounted for 66% of the PM10 total mass concentration...
May 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28544752/enantioselective-nickel-catalyzed-intramolecular-allylic-alkenylations-enabled-by-reversible-alkenylnickel-e-z-isomerization
#4
Connor Yap, Gabriel Mj Lenagh-Snow, Somnath N Karad, William Lewis, Louis J Diorazio, Hon Wai Lam
Enantioselective nickel-catalyzed arylative cyclizations of substrates containing a Z-allylic phosphate tethered to an alkyne are described. These reactions give multisubstituted chiral aza- and carbocycles, and are initiated by the addition of an arylboronic acid to the alkyne, followed by cyclization of the resulting alkenylnickel species onto the allylic phosphate. The reversible E/Z isomerization of the alkenylnickel species is essential for the success of the reactions.
May 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28541589/developing-the-supporting-choice-observational-tool-scot-a-formative-assessment-tool-to-assist-nursing-home-staff-in-realizing-resident-choice
#5
Jennifer A Palmer, Victoria A Parker, James F Burgess, Dan Berlowitz, A Lynn Snow, Susan L Mitchell, Christine W Hartmann
Quality of care in nursing homes has begun to address the importance of resident choice in daily life, yet there are no published tools to teach nursing home staff how to offer such choice. In the current study, a formative assessment tool was developed that can provide staff with detailed and concrete feedback on how to realize resident choice. The tool was created and refined through 22 hours of ethnographic observation in two Veterans Health Administration Community Living Centers (CLCs), 22 hours of developmental testing in two CLCs, review by a modified Delphi panel, and use of an algorithm to assess its logical structure...
May 1, 2017: Research in Gerontological Nursing
https://www.readbyqxmd.com/read/28541489/respiratory-effects-and-systemic-stress-response-following-acute-acrolein-inhalation-in-rats
#6
Samantha J Snow, Marie A McGee, Andres Henriquez, Judy E Richards, Mette C Schladweiler, Allen D Ledbetter, Urmila P Kodavanti
Previous studies have demonstrated that exposure to the pulmonary irritant ozone causes myriad systemic metabolic and pulmonary effects attributed to sympathetic and hypothalamus-pituitary-adrenal (HPA) axis activation, which are exacerbated in metabolically-impaired models. We examined respiratory and systemic effects following exposure to a sensory irritant acrolein to elucidate the systemic and pulmonary consequences in healthy and diabetic rat models. Male Wistar and Goto Kakizaki (GK) rats, a non-obese type II diabetic Wistar-derived model, were exposed by inhalation to 0, 2, or 4 ppm acrolein, 4h/day for 1 or 2 days...
May 24, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28539929/nitrogen-cycling-from-increased-soil-organic-carbon-contributes-both-positively-and-negatively-to-ecosystem-services-in-wheat-agro-ecosystems
#7
Jeda Palmer, Peter J Thorburn, Jody S Biggs, Estelle J Dominati, Merv E Probert, Elizabeth A Meier, Neil I Huth, Mike Dodd, Val Snow, Joshua R Larsen, William J Parton
Soil organic carbon (SOC) is an important and manageable property of soils that impacts on multiple ecosystem services through its effect on soil processes such as nitrogen (N) cycling and soil physical properties. There is considerable interest in increasing SOC concentration in agro-ecosystems worldwide. In some agro-ecosystems, increased SOC has been found to enhance the provision of ecosystem services such as the provision of food. However, increased SOC may increase the environmental footprint of some agro-ecosystems, for example by increasing nitrous oxide emissions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28539305/deconstructing-cancer-patient-information-seeking-in-a-consumer-health-library-toward-developing-a-virtual-information-consult-for-cancer-patients-and-their-caregivers-a-qualitative-instrumental-case-study
#8
Janet Papadakos, Aileen Trang, Alaina B Cyr, Nazek Abdelmutti, Meredith E Giuliani, Michelle Snow, Tara McCurdie, Menaka Pulandiran, Sara Urowitz, David Wiljer
BACKGROUND: Cancer patients and their caregivers want information about their disease and are interested in finding health information online. Despite the abundance of cancer information online, it is often fragmented, its quality is highly variable, and it can be difficult to navigate without expert-level knowledge of the cancer system. The Patient & Family Library at the Princess Margaret Cancer Centre offers a broad collection of high-quality cancer health information and staff are available to help patrons refine their questions and explore information needs that they may not have considered...
May 24, 2017: JMIR Cancer
https://www.readbyqxmd.com/read/28538637/factors-associated-with-intimate-partner-homicide-in-illinois-2005-2010-findings-from-the-illinois-violent-death-reporting-system
#9
Sana Yousuf, Suzanne McLone, Maryann Mason, Lisa Snow, Carol Gall, Karen Sheehan
BACKGROUND: Critical elements in intimate partner homicides (IPH) often go undocumented. Previous studies have highlighted precipitating causes, but few have examined the place of injury that led to the victim's death. We sought to describe IPH cases in Illinois, and in particular to examine factors surrounding the location of injury that led to the victim's death. METHODS: We analyzed data collected in the Illinois Violent Death Reporting System (IVDRS) to assess victim demographics, perpetrator characteristics, the victim/perpetrator relationship, and circumstances surrounding the location of injury that led to the victim's death...
May 22, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28537717/organophosphate-esters-in-air-snow-and-seawater-in-the-north-atlantic-and-the-arctic
#10
Jing Li, Zhiyong Xie, Wenying Mi, Senchao Lai, Chongguo Tian, Kay-Christian Emeis, Ralf Ebinghaus
The concentrations of eight organophosphate esters (OPEs) have been investigated in air, snow and seawater samples collected during the cruise of ARK-XXVIII/2 from 6th June to 3rd July 2014 across the North Atlantic and the Arctic. The sum of gaseous and particle concentrations (∑OPE) ranged from 35 to 343 pg/m3. The three chlorinated OPEs accounted for 88 ± 5% of the ∑OPE. The most abundant OPE was tris-(2-chloroethyl) phosphate (TCEP), with concentrations ranging from 30 to 227 pg/m3, followed by three major OPEs, such as tris-(1-chloro-2-propyl) phosphate (TCPP, 0...
May 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28536963/hair-geochemical-composition-of-children-from-vilnius-kindergartens-as-an-indicator-of-environmental-conditions
#11
Ričardas Taraškevičius, Rimantė Zinkutė, Laura Gedminienė, Žilvinas Stankevičius
The research is based on analysis data of Cr, Cu, Mn, Ni, V, Zn (metals) and S in the hair of 47 girls and 63 boys from eight Vilnius kindergartens and the distribution pattern of high metal concentrations and bioavailability in snow-cover dust, also dust samples from vents of characteristic pollution sources. The kindergartens were selected according to topsoil total contamination index and dust-related indices. Significantly higher Cu, Mn, Ni and Zn concentrations in the hair of girls (means are 1.1, 1.9, 1...
May 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28528627/physical-risk-factors-identification-based-on-body-sensor-network-combined-to-videotaping
#12
Nicolas Vignais, Fabien Bernard, Gérard Touvenot, Jean-Claude Sagot
The aim of this study was to perform an ergonomic analysis of a material handling task by combining a subtask video analysis and a RULA computation, implemented continuously through a motion capture system combining inertial sensors and electrogoniometers. Five workers participated to the experiment. Seven inertial measurement units, placed on the worker's upper body (pelvis, thorax, head, arms, forearms), were implemented through a biomechanical model of the upper body to continuously provide trunk, neck, shoulder and elbow joint angles...
May 18, 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28528262/stable-isotope-tracing-of-ni-and-cu-pollution-in-north-east-norway-potentials-and-drawbacks
#13
Hana Šillerová, Vladislav Chrastný, Martina Vítková, Anna Francová, Jan Jehlička, Marissa R Gutsch, Jana Kocourková, Paul E Aspholm, Lars O Nilsson, Tore F Berglen, Henning K B Jensen, Michael Komárek
The use of Ni and Cu isotopes for tracing contamination sources in the environment remains a challenging task due to the limited information about the influence of various biogeochemical processes influencing stable isotope fractionation. This work focuses on a relatively simple system in north-east Norway with two possible endmembers (smelter-bedrock) and various environmental samples (snow, soil, lichens, PM10). In general, the whole area is enriched in heavy Ni and Cu isotopes highlighting the impact of the smelting activity...
May 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28527076/the-role-of-visual-system-in-migraine
#14
Stefania Bianchi Marzoli, Alessandra Criscuoli
The visual system is involved in different ways in migraine. Visual auras are the most common form of migraine aura. It may consist of positive or negative visual symptoms and cortical spreading depression is felt to be the phenomenon that underlies it. Even in migraine without aura, vision it is not totally excluded given that one of the major criteria for the diagnosis of migraine is photophobia. In persistent visual aura, patients refer symptoms defined as visual snow and television static. In retinal migraine unilateral decreased vision or complete visual loss occurs...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28526524/visual-snow-in-a-paediatric-patient
#15
E Santos-Bueso, A M Muñoz-Hernández, N Avalos-Franco, S García-Sáenz, F Sáenz-Francés, J Porta-Etessam
CASE REPORT: The case is presented of an 11 year-old girl referring to a one year history of photophobia and continuously seeing white spots in both eyes. The patient had a visual acuity of unity in both eyes, and a normal eye examination, and was referred to the Neuro-ophthalmology Unit. Once complete laboratory and imaging tests ruled out the possibility of any neurological pathology, she was diagnosed with visual snow (VS). DISCUSSION: VS is an isolated symptom, possibly part of the migraine aura, that is referred by patients reporting numerous and constant white dots moving in the visual field of BE...
May 16, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28525869/hepatic-microsomal-metabolism-of-bde-47-and-bde-99-by-lesser-snow-geese-and-japanese-quail
#16
Lisa K Krieger, András Szeitz, Stelvio M Bandiera
In the present study, we investigated the oxidative biotransformation of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) and 2,2',4,4',5-pentabromodiphenyl ether (BDE-99) by liver microsomes from wild lesser snow geese (Chen caerulescens caerulescens) and domesticated Japanese quail (Coturnix japonica). Formation of hydroxy-metabolites was analyzed using an ultra-high performance liquid chromatography-tandem mass spectrometry-based method. Incubation of BDE-47 with avian liver microsomes produced sixteen hydroxy-metabolites, eight of which were identified using authentic standards...
May 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28524876/self-assembly-of-a-supramolecular-hexagram-and-a-supramolecular-pentagram
#17
Zhilong Jiang, Yiming Li, Ming Wang, Bo Song, Kun Wang, Mingyu Sun, Die Liu, Xiaohong Li, Jie Yuan, Mingzhao Chen, Yuan Guo, Xiaoyu Yang, Tong Zhang, Charles N Moorefield, George R Newkome, Bingqian Xu, Xiaopeng Li, Pingshan Wang
Five- and six-pointed star structures occur frequently in nature as flowers, snow-flakes, leaves and so on. These star-shaped patterns are also frequently used in both functional and artistic man-made architectures. Here following a stepwise synthesis and self-assembly approach, pentagonal and hexagonal metallosupramolecules possessing star-shaped motifs were prepared based on the careful design of metallo-organic ligands (MOLs). In the MOL design and preparation, robust ruthenium-terpyridyl complexes were employed to construct brominated metallo-organic intermediates, followed by a Suzuki coupling reaction to achieve the required ensemble...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28523580/chemical-characterization-of-surface-snow-in-istanbul-nw-turkey-and-their-association-with-atmospheric-circulations
#18
Asli Baysal, Hakki Baltaci, Nil Ozbek, Orhan Destanoglu, Gul Sirin Ustabasi, Gulcin Gumus
The understanding of the impurities in natural snow is important in realizing its atmospheric quality, soil characteristics, and the pollution caused to the environment. Knowledge of the occurrence of major ions and trace metals in the snow in the megacity of Istanbul is very limited. This manuscript attempts to understand the origin of major soluble ions (fluoride, acetate, formate, chlorite, chloride, nitrite, chlorate, bromide, nitrate, sulfate, phosphate, and perchlorate) and some trace metals (Fe, Mn, Cd, Co, Ni, Pb, Zn, Cu) in winter surface snow, collected in Istanbul, Turkey...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28522601/bereavement-without-a-death
#19
Rosamund Snow
No abstract text is available yet for this article.
May 18, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28520625/the-relationship-between-weather-and-objectively-measured-physical-activity-among-individuals-with-copd
#20
Shea M Balish, Gail Dechman, Paul Hernandez, John C Spence, Ryan E Rhodes, Kerry McGannon, Chris Blanchard
PURPOSE: Although daily variation in weather impacts physical activity (PA) levels among relatively healthy individuals, it is largely unknown whether this relationship occurs for those living with chronic obstructive pulmonary disease (COPD). The purpose of this study was to examine how daily variation in temperature, rain, and snow is related to objectively measured PA among patients with COPD, and whether demographic or clinical characteristics moderate these relationships. METHODS: Patients with COPD completed a questionnaire and wore a pedometer for 7 days at baseline, end of pulmonary rehabilitation (PR), and 3 and 9 months after completing PR (28 days in total)...
May 24, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
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