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https://www.readbyqxmd.com/read/28413846/a-carbon-balance-model-for-the-great-dismal-swamp-ecosystem
#1
Rachel Sleeter, Benjamin M Sleeter, Brianna Williams, Dianna Hogan, Todd Hawbaker, Zhiliang Zhu
BACKGROUND: Carbon storage potential has become an important consideration for land management and planning in the United States. The ability to assess ecosystem carbon balance can help land managers understand the benefits and tradeoffs between different management strategies. This paper demonstrates an application of the Land Use and Carbon Scenario Simulator (LUCAS) model developed for local-scale land management at the Great Dismal Swamp National Wildlife Refuge. We estimate the net ecosystem carbon balance by considering past ecosystem disturbances resulting from storm damage, fire, and land management actions including hydrologic inundation, vegetation clearing, and replanting...
December 2017: Carbon Balance and Management
https://www.readbyqxmd.com/read/28344928/physical-and-monetary-ecosystem-service-accounts-for-europe-a-case-study-for-in-stream-nitrogen-retention
#2
Alessandra La Notte, Joachim Maes, Silvana Dalmazzone, Neville D Crossman, Bruna Grizzetti, Giovanni Bidoglio
In this paper we present a case study of integrated ecosystem and economic accounting based on the System of Environmental Economic Accounting - Experimental Ecosystem Accounts (SEEA-EEA). We develop accounts, in physical and monetary terms, for the water purification ecosystem service in Europe over a 20-year time period (1985-2005). The estimation of nitrogen retention is based on the GREEN biophysical model, within which we impose a sustainability threshold to obtain the physical indicators of capacity - the ability of an ecosystem to sustainably supply ecosystem services...
February 2017: Ecosystem Services
https://www.readbyqxmd.com/read/28342844/a-system-dynamics-modelling-approach-to-assess-the-impact-of-launching-a-new-nicotine-product-on-population-health-outcomes
#3
Andrew Hill, Oscar M Camacho
In 2012 the US FDA suggested the use of mathematical models to assess the impact of releasing new nicotine or tobacco products on population health outcomes. A model based on system dynamics methodology was developed to project the potential effects of a new nicotine product at a population level. A model representing traditional smoking populations (never, current and former smokers) and calibrated using historical data was extended to a two-product model by including electronic cigarettes use statuses. Smoking mechanisms, such as product initiation, switching, transition to dual use, and cessation, were represented as flows between smoking statuses (stocks) and the potential effect of smoking renormalisation through a feedback system...
March 22, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28321638/wearing-graduated-compression-stockings-augments-cutaneous-vasodilation-in-heat-stressed-resting-humans
#4
Naoto Fujii, Toshiya Nikawa, Bun Tsuji, Narihiko Kondo, Glen P Kenny, Takeshi Nishiyasu
PURPOSE: We investigated whether graduated compression induced by stockings enhances cutaneous vasodilation in passively heated resting humans. METHODS: Nine habitually active young men were heated at rest using water-perfusable suits, resulting in a 1.0 °C increase in body core temperature. Heating was repeated twice on separate occasions while wearing either (1) stockings that cause graduated compression (pressures of 26.4 ± 5.3, 17.5 ± 4.4, and 6...
March 20, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28319164/modeling-the-potential-impact-on-the-us-blood-supply-of-transfusing-critically-ill-patients-with-fresher-stored-red-blood-cells
#5
Arianna Simonetti, Hussein Ezzeldin, Mikhail Menis, Stephen McKean, Hector Izurieta, Steven A Anderson, Richard A Forshee
BACKGROUND: Although some studies have suggested that transfusion recipients may have better medical outcomes if transfused with red blood cell units stored for a short time, the overall body of evidence shows mixed results. It is important to understand how using fresher stored red blood cell units for certain patient groups may affect blood availability. METHODS: Based on the Stock-and-Flow simulation model of the US blood supply developed by Simonetti et al. 2014, we evaluated a newly implemented allocation method of preferentially transfusing fresher stored red blood cell units to a subset of high-risk group of critically ill patients and its potential impact on supply...
2017: PloS One
https://www.readbyqxmd.com/read/28316562/changes-in-cigarette-smoking-initiation-cessation-and-relapse-among-u-s-adults-a-comparison-of-two-longitudinal-samples
#6
Zinan Yi, Maria E Mayorga, Kristen Hassmiller Lich, Jennifer L Pearson
BACKGROUND: The tobacco epidemic in the U.S. has matured in the past decade. However, due to rapidly changing social policy and commercial environments, tailored prevention and interventions are needed to support further reduction in smoking. METHODS: Using Tobacco Use Supplement to the Current Population Survey (TUS-CPS) 2002-2003 and 2010-2011 longitudinal cohorts, five smoking states are defined including daily-heavy, daily-light, non-daily, former and non-smoker...
2017: Tobacco Induced Diseases
https://www.readbyqxmd.com/read/28301932/degradation-of-fluorotelomer-based-polymers-contributes-to-the-global-occurrence-of-fluorotelomer-alcohol-and-perfluoroalkyl-carboxylates-a-combined-dynamic-substance-flow-and-environmental-fate-modeling-analysis
#7
Li Li, Jianguo Liu, Jianxin Hu, Frank Wania
Using coupled dynamic substance flow and environmental fate models, CiP-CAFE and BETR-Global, we investigated whether the degradation of side-chain fluorotelomer-based polymers (FTPs), mostly in waste stocks (i.e., landfills and dumps), serves as a long-term source of fluorotelomer alcohols (FTOHs) and perfluoroalkyl carboxylates (PFCAs) to the global environment. The modeling results indicate that, in the wake of the worldwide transition from long-chain to short-chain products, in-use stocks of C8 FTPs will peak and decline afterward, while the in-use stocks of C6 FTPs, and the waste stocks of both FTPs will generally grow...
March 28, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28301506/measuring-complexity-in-brazilian-economic-crises
#8
Letícia P D Mortoza, José R C Piqueira
Capital flows are responsible for a strong influence on the foreign exchange rates and stock prices macroeconomic parameters. In volatile economies, capital flows can change due to several types of social, political and economic events, provoking oscillations on these parameters, which are recognized as economic crises. This work aims to investigate how these two macroeconomic variables are related with crisis events by using the traditional complex measures due to Lopez-Mancini-Calbet (LMC) and to Shiner-Davison-Landsberg (SDL), that can be applied to any temporal series...
2017: PloS One
https://www.readbyqxmd.com/read/28297602/use-storage-and-disposal-of-electronic-equipment-in-switzerland
#9
Esther Thiébaud, Lorenz M Hilty, Mathias Schluep, Martin Faulstich
Electronic devices contain important resources, including precious and critical raw materials. For an efficient management of these resources, it is important to know where the devices are located, how long they are used and when and how they are disposed of. In this article, we explore the past and current quantities of electronic devices in the in-use stock and storage stock in Switzerland and quantify the flows between the use, storage and disposal phase with dynamic material flow analysis (MFA). Devices included are mobile phones, desktop and laptop computers, monitors, cathode ray tube and flat panel display televisions, DVD players, and headphones...
March 28, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28292984/plaques-formed-by-mutagenized-viral-populations-have-elevated-coinfection-frequencies
#10
Elizabeth R Aguilera, Andrea K Erickson, Palmy R Jesudhasan, Christopher M Robinson, Julie K Pfeiffer
The plaque assay is a common technique used to measure virus concentrations and is based upon the principle that each plaque represents a single infectious unit. As such, the number of plaques is expected to correlate linearly with the virus dilution plated, and each plaque should be formed by a single founder virus. Here, we examined whether more than one virus can contribute to plaque formation. By using genetic and phenotypic assays with genetically marked polioviruses, we found that multiple parental viruses are present in 5 to 7% of plaques, even at an extremely low multiplicity of infection...
March 14, 2017: MBio
https://www.readbyqxmd.com/read/28288391/evidence-of-phenotypic-stability-after-transduction-of-fluorescent-proteins-in-two-human-tongue-cancer-cell-lines
#11
Wei-Xin Cai, Li-Wu Zheng, Hong-Zhang Huang, Roger A Zwahlen
OBJECTIVES: This study investigated the phenotypic stability and biological properties of two human tongue cancer cell lines after transduction of fluorescent proteins. DESIGN: The human tongue cancer cell lines UM1 and UM2 were cultured with GFP and RFP lentiviral particles stock for 72h. Cells with successful transduction of fluorescent proteins were selected in a medium containing G418 antibiotics for two weeks. The proliferation rates of parental and transduced cell lines were evaluated by their population doubling time (PDT)...
March 6, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28276090/the-content-and-meaning-of-administrative-work-a-qualitative-study-of-nursing-practices
#12
Lucie Michel, Mathias Waelli, Davina Allen, Etienne Minvielle
AIM: To investigate the content and meaning of nurses' administrative work. BACKGROUND: Nurses often report that administrative work keeps them away from bedside care. The content and meaning of this work remains insufficiently explored. DESIGN: Comparative case studies. METHOD: The investigation took place in 2014. It was based on 254 hours of observations and 27 interviews with nurses and staff in two contrasting units: intensive care and long term care...
March 9, 2017: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/28252906/-what-nurses-see-occurrence-and-typology-of-wastes-in-medical-and-surgical-wards-a-cross-sectional-study
#13
Angelo Dante, Michela Marega, Adriana Peteani, Adriana Checchi, Loreto Lancia
AIM: To describe the occurrence and the typology of waste in the nurses clinical practice as well as the differences between the medical and surgical area. METHODS: A cross-sectional study was conducted in a north eastern Italian hospital. Data collection, conducted on 100 nurses in September 2015, was carried out using a semi-structured questionnaire consisting of 56 items and eight dimensions (Overproduction / Underutilisation, Wait, Stocks, Process, Inefficiency and Errors, Material Transport and Information Flows, Movements, Dispersion of Knowledge)...
October 2016: Professioni Infermieristiche
https://www.readbyqxmd.com/read/28250810/managing-cryptic-biodiversity-fine-scale-intralacustrine-speciation-along-a-benthic-gradient-in-alpine-whitefish-coregonus-spp
#14
Alan G Hudson, Baenz Lundsgaard-Hansen, Kay Lucek, Pascal Vonlanthen, Ole Seehausen
Whitefish (Coregonus spp.) are an important catch for many freshwater fisheries, particularly in Switzerland. In support of this, supplemental stocking of whitefish species is carried out, despite lacking complete knowledge of the extent, distribution and origin of whitefish diversity in these lakes, potentially threatening local endemics via artificial gene flow. Here, we investigate phenotypic and genetic differentiation among coexisting whitefish species spawning along a depth gradient in a subalpine Swiss lake to better delineate intralacustrine whitefish biodiversity...
March 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/28247843/quantitative-analysis-of-aloins-and-aloin-emodin-in-aloe-vera-raw-materials-and-finished-products-using-high-performance-liquid-chromatography-single-laboratory-validation-first-action-2016-09
#15
David Kline, Vicha Ritruthai, Silva Babajanian, Quanyin Gao, Prashant Ingle, Peter Chang, Gary Swanson
A single-laboratory validation study is described for a method of quantitative analysis of aloins (aloins A and B) andaloe-emodin in aloe vera raw materials and finished products. This method used HPLC coupled with UV detection at 380 nm for the aloins and 430 nm for aloe-emodin. The advantage of this test method is that the target analytes are concentrated from the sample matrix (either liquid or solid form) using stepwise liquid-liquid extraction (water-ethyl acetate-methanol), followed by solvent evaporation and reconstitution...
February 28, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28237472/flow-stock-and-impact-assessment-of-refrigerants-in-the-japanese-household-air-conditioner-sector
#16
Mianqiang Xue, Naoya Kojima, Takashi Machimura, Akihiro Tokai
Refrigerants provide society with great benefits while have the potential to cause adverse effects on the environment and human health. The present study estimated time-dependent flows and stocks and assessed the effects of refrigerants (R-22, R-410a, and R-32) in household air conditioners in Japan. It was found that stock of R-22 and R-410a peaked at 49,147t in 2000 and 55,994t in 2017, respectively. The largest flow of R-22 and R-410a to waste phase occurred at 3417t/yr. in 2005 and 4011t/yr. in 2023, respectively...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28216806/regional-distribution-and-losses-of-end-of-life-steel-throughout-multiple-product-life-cycles-insights-from-the-global-multiregional-matrace-model
#17
Stefan Pauliuk, Yasushi Kondo, Shinichiro Nakamura, Kenichi Nakajima
Substantial amounts of post-consumer scrap are exported to other regions or lost during recovery and remelting, and both export and losses pose a constraint to desires for having regionally closed material cycles. To quantify the challenges and trade-offs associated with closed-loop metal recycling, we looked at the material cycles from the perspective of a single material unit and trace a unit of material through several product life cycles. Focusing on steel, we used current process parameters, loss rates, and trade patterns of the steel cycle to study how steel that was originally contained in high quality applications such as machinery or vehicles with stringent purity requirements gets subsequently distributed across different regions and product groups such as building and construction with less stringent purity requirements...
January 2017: Resources, Conservation, and Recycling
https://www.readbyqxmd.com/read/28214118/optimizing-peri-urban-ecosystems-pure-to-re-couple-urban-rural-symbiosis
#18
REVIEW
Yong-Guan Zhu, Brian J Reid, Andrew A Meharg, Steve A Banwart, Bo-Jie Fu
Globally, rapid urbanization, along with economic development, is dramatically changing the balance of biogeochemical cycles, impacting upon ecosystem services and impinging on United Nation global sustainability goals (inter alia: sustainable cities and communities; responsible consumption and production; good health and well-being; clean water and sanitation, and; to protect and conserve life on land and below water). A key feature of the urban ecosystems is that nutrient stocks, carbon (C), nitrogen (N) and phosphorus (P), are being enriched...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28196339/acoustic-measurement-and-morphological-features-of-organic-sediment-deposits-in-combined-sewer-networks
#19
Iacopo Carnacina, Frédérique Larrarte, Nicoletta Leonardi
The performance of sewer networks has important consequences from an environmental and social point of view. Poor functioning can result in flood risk and pollution at a large scale. Sediment deposits forming in sewer trunks might severely compromise the sewer line by affecting the flow field, reducing cross-sectional areas, and increasing roughness coefficients. In spite of numerous efforts, the morphological features of these depositional environments remain poorly understood. The interface between water and sediment remains inefficiently identified and the estimation of the stock of deposit is frequently inaccurate...
January 26, 2017: Water Research
https://www.readbyqxmd.com/read/28184238/a-carbon-balance-model-for-the-great-dismal-swamp-ecosystem
#20
Rachel Sleeter, Benjamin M Sleeter, Brianna Williams, Dianna Hogan, Todd Hawbaker, Zhiliang Zhu
BACKGROUND: Carbon storage potential has become an important consideration for land management and planning in the United States. The ability to assess ecosystem carbon balance can help land managers understand the benefits and tradeoffs between different management strategies. This paper demonstrates an application of the Land Use and Carbon Scenario Simulator (LUCAS) model developed for local-scale land management at the Great Dismal Swamp National Wildlife Refuge. We estimate the net ecosystem carbon balance by considering past ecosystem disturbances resulting from storm damage, fire, and land management actions including hydrologic inundation, vegetation clearing, and replanting...
December 2017: Carbon Balance and Management
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