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https://www.readbyqxmd.com/read/29156279/the-stocks-and-flows-of-nitrogen-phosphorus-and-potassium-across-a-30-year-time-series-for-agriculture-in-huantai-county-china
#1
Jessica Bellarby, Ben W J Surridge, Philip M Haygarth, Kun Liu, Giuseppina Siciliano, Laurence Smith, Clive Rahn, Fanqiao Meng
In order to improve the efficiency of nutrient use whilst also meeting projected changes in the demand for food within China, new nutrient management frameworks comprised of policy, practice and the means of delivering change are required. These frameworks should be underpinned by systemic analyses of the stocks and flows of nutrients within agricultural production. In this paper, a 30-year time series of the stocks and flows of nitrogen (N), phosphorus (P) and potassium (K) are reported for Huantai county, an exemplar area of intensive agricultural production in the North China Plain...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29153809/heartmate-iii-left-ventricular%C3%A2-assist-device-thrombosis-triggered-by-an%C3%A2-automatic-implantable-cardioverter-defibrillator-shock
#2
Stefan Klotz, Antje Karluss, Sina Stock, Alex Frydrychowicz, Hans-Hinrich Sievers
We report the case of an HeartMate III left ventricular assist device (LVAD) thrombosis triggered by a shock from an automatic implantable cardioverter defibrillator, releasing a left ventricular thrombus sucked in the LVAD inflow cannula. With LVAD low flow only the increase in motor temperature gave a hint of the thrombosis and a computer tomography scan confirmed the diagnosis. Pump exchange was performed with an uneventful outcome.
December 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29151854/strong-population-structure-deduced-from-genetics-otolith-chemistry-and-parasite-abundances-explains-vulnerability-to-localized-fishery-collapse-in-a-large-sciaenid-fish-protonibea%C3%A2-diacanthus
#3
Laura Taillebois, Diane P Barton, David A Crook, Thor Saunders, Jonathan Taylor, Mark Hearnden, Richard J Saunders, Stephen J Newman, Michael J Travers, David J Welch, Alan Greig, Christine Dudgeon, Safia Maher, Jennifer R Ovenden
As pressure on coastal marine resources is increasing globally, the need to quantitatively assess vulnerable fish stocks is crucial in order to avoid the ecological consequences of stock depletions. Species of Sciaenidae (croakers, drums) are important components of tropical and temperate fisheries and are especially vulnerable to exploitation. The black-spotted croaker, Protonibea diacanthus, is the only large sciaenid in coastal waters of northern Australia where it is targeted by commercial, recreational and indigenous fishers due to its food value and predictable aggregating behaviour...
December 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/29149202/intraspecific-evolutionary-relationships-among-peregrine-falcons-in-western-north-american-high-latitudes
#4
Sandra L Talbot, George K Sage, Sarah A Sonsthagen, Meg C Gravley, Ted Swem, Jeffrey C Williams, Jonathan L Longmire, Skip Ambrose, Melanie J Flamme, Stephen B Lewis, Laura Phillips, Clifford Anderson, Clayton M White
Subspecies relationships within the peregrine falcon (Falco peregrinus) have been long debated because of the polytypic nature of melanin-based plumage characteristics used in subspecies designations and potential differentiation of local subpopulations due to philopatry. In North America, understanding the evolutionary relationships among subspecies may have been further complicated by the introduction of captive bred peregrines originating from non-native stock, as part of recovery efforts associated with mid 20th century population declines resulting from organochloride pollution...
2017: PloS One
https://www.readbyqxmd.com/read/29129064/impacts-of-combined-cooling-heating-and-power-systems-and-rainwater-harvesting-on-water-demand-carbon-dioxide-and-nox-emissions-for-atlanta
#5
Jean-Ann James, Sangwoo Sung, Hyunju Jeong, Osvaldo Alejandro Broesicke, Steve French, Duo Li, John C Crittenden
The purpose of this study is to explore the potential water, CO2 and NOx emission, and cost savings that the deployment of decentralized water and energy technologies within two urban growth scenarios can achieve. We assess the effectiveness of urban growth, technological, and political strategies to reduce these burdens in the 13-county Atlanta metropolitan region. The urban growth between 2005 and 2030 was modeled for a business as usual (BAU) scenario and a more compact growth (MCG) scenario. We considered combined cooling, heating and power (CCHP) systems using microturbines for our decentralized energy technology and rooftop rainwater harvesting and low flow fixtures for the decentralized water technologies...
November 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29114261/low-genetic-diversity-and-structuring-of-the-arapaima-osteoglossiformes-arapaimidae-population-of-the-araguaia-tocantins-basin
#6
Carla A Vitorino, Fabrícia Nogueira, Issakar L Souza, Juliana Araripe, Paulo C Venere
The arapaima, Arapaima gigas, is a fish whose populations are threatened by both overfishing and the ongoing destruction of its natural habitats. In the Amazon basin, varying levels of population structure have been found in A. gigas, although no data are available on the genetic diversity or structure of the populations found in the Araguaia-Tocantins basin, which has a topographic profile, hydrological regime, and history of fishing quite distinct from those of the Amazon. In this context, microsatellite markers were used to assess the genetic diversity and connectivity of five wild A...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/29113440/geigerin-induced-cytotoxicity-in-a-murine-myoblast-cell-line-c2c12
#7
Christo J Botha, Sarah J Clift, Gezina C H Ferreira, Mxolisi G Masango
Geigeria poisoning in sheep, locally known as 'vermeersiekte', is an economically important plant poisoning in southern Africa. The toxic principles contained by the toxic plants are believed to be several sesquiterpene lactones, such as geigerin, vermeeric acid and vermeerin, which cause striated muscle lesions in small stock. Because of ethical issues surrounding the use of live animals in toxicity studies, there is currently a dire need to establish an in vitro model that can be used to replace traditional animal experimentation...
October 31, 2017: Onderstepoort Journal of Veterinary Research
https://www.readbyqxmd.com/read/29091261/the-mouse-model-of-infection-with-citrobacter-rodentium
#8
Nicolas Bouladoux, Oliver J Harrison, Yasmine Belkaid
Citrobacter rodentium is a murine mucosal pathogen used as a model to elucidate the molecular and cellular pathogenesis of infection with two clinically important human gastrointestinal pathogens, enteropathogenic Escherichia coli (EPEC) and enterohaemorrhagic E. coli (EHEC). C. rodentium infection provides an excellent model to study different aspects of host-pathogen interaction in the gut, including intestinal inflammatory responses during bacteria-induced colitis, mucosal healing and epithelial repair, the induction of mucosal immune responses, and the role of the intestinal microbiota in mediating resistance to colonization by enteric pathogens...
November 1, 2017: Current Protocols in Immunology
https://www.readbyqxmd.com/read/29064664/nitrogenase-cofactor-assembly-an-elemental-inventory
#9
Nathaniel S Sickerman, Markus W Ribbe, Yilin Hu
Nitrogenase is known for its remarkable ability to catalyze the reduction of N2 to NH3, and C1 substrates to short-chain hydrocarbon products, under ambient conditions. The best-studied Mo-nitrogenase utilizes a complex metallocofactor as the site of substrate binding and reduction. Designated the M-cluster, this [MoFe7S9C(R-homocitrate)] cluster can be viewed as [MoFe3S3] and [Fe4S3] subclusters bridged by three μ2-sulfides and one μ6-interstitial carbide, with its Mo end further coordinated by an R-homocitrate moiety...
October 24, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29063197/emission-of-greenhouse-gases-and-soil-carbon-sequestration-in-a-riparian-marsh-wetland-in-central-ohio
#10
Subir K Nag, Ruiqiang Liu, Rattan Lal
Wetlands are a C sink, but they also account for a large natural source of greenhouse gases (GHG), particularly methane (CH4). Soils of wetlands play an important role in alleviating the global climate change regardless of the emission of CH4. However, there are uncertainties about the amount of C stored and emitted from wetlands because of the site specific factors. Therefore, the present study was conducted in a temperate riverine flow-through wetland, part of which was covered with emerging macrophyte Typhus latifolia in central Ohio, USA, with the objective to assess emissions of GHGs (CH4, CO2, N2O) and measure C and nitrogen (N) stocks in wetland soil in comparison to a reference upland site...
October 23, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29057216/contribution-of-in-vivo-experimental-challenges-to-understanding-flat-oyster-ostrea-edulis-resistance-to-bonamia-ostreae
#11
Benjamin Morga, Tristan Renault, Nicole Faury, Sophie Lerond, Céline Garcia, Bruno Chollet, Jean-Pierre Joly, Sylvie Lapègue, Estelle Harrang, Isabelle Arzul
Bonamiosis due to the parasite Bonamia ostreae has been associated with massive mortality outbreaks in European flat oyster stocks in Europe. As eradication and treatment are not possible, the control of the disease mainly relies on transfer restriction. Moreover, selection has been applied to produce resistant flat oyster families, which present better survival and lower prevalence than non-selected oysters. In order to better understand the mechanisms involved in resistance to bonamiosis, cellular and molecular responses of 2 oyster groups (selected oysters and wild-type oysters) were analyzed in the context of experimental injection and cohabitation infections...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29052980/decabromodiphenyl-ether-decabde-in-electrical-and-electronic-equipment-in-japan-stock-emission-and-substitution-evaluation
#12
Mianqiang Xue, Liang Zhou, Naoya Kojima, Takashi Machimura, Akihiro Tokai
DecaBDE has been widely used as flame retardant in electrical and electronic equipment (EEE). It has recently been listed in Annex A of the Stockholm Convention. The time series flow, stock, and emission of DecaBDE in EEE in Japan were quantified. On this basis, a risk/risk trade-off analysis of substituting DecaBDE with triphenyl phosphate (TPhP) that is one possible phosphorus-based alternative was conducted. The stock of DecaBDE reached a maximum of ∼42 000 t in 1995. Even though the demand flow was negligible in 2030, the stock was modeled to be still ∼470 t...
October 31, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29029075/improving-health-systems-performance-in-low-and-middle-income-countries-a-system-dynamics-model-of-the-pay-for-performance-initiative-in-afghanistan
#13
O Alonge, S Lin, T Igusa, D H Peters
System dynamics methods were used to explore effective implementation pathways for improving health systems performance through pay-for-performance (P4P) schemes. A causal loop diagram was developed to delineate primary causal relationships for service delivery within primary health facilities. A quantitative stock-and-flow model was developed next. The stock-and-flow model was then used to simulate the impact of various P4P implementation scenarios on quality and volume of services. Data from the Afghanistan national facility survey in 2012 was used to calibrate the model...
December 1, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/29024140/do-genetic-drift-and-accumulation-of-deleterious-mutations-preclude-adaptation-empirical-investigation-using-radseq-in-a-northern-lacustrine-fish
#14
Charles Perrier, Anne-Laure Ferchaud, Pascal Sirois, Isabel Thibault, Louis Bernatchez
Understanding genomic signatures of divergent selection underlying long-term adaptation in populations located in heterogeneous environments is a key goal in evolutionary biology. In this study, we investigated neutral, adaptive and deleterious genetic variation using 7,192 SNPs in 31 Lake Trout (Salvelinus namaycush) populations (n = 673) from Québec, Canada. Average genetic diversity was low, weakly shared among lakes, and positively correlated with lake size, indicating a major role for genetic drift subsequent to lake isolation...
October 12, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29022708/dynamic-model-for-the-stocks-and-release-flows-of-engineered-nanomaterials
#15
Runsheng Song, Yuwei Qin, Sangwon Suh, Arturo A Keller
Most existing life-cycle release models for engineered nanomaterials (ENM) are static, ignoring the dynamics of stock and flows of ENMs. Our model, nanoRelease, estimates the annual releases of ENMs from manufacturing, use, and disposal of a product explicitly taking stock and flow dynamics into account. Given the variabilities in key parameters (e.g., service life of products and annual release rate during use) nanoRelease is designed as a stochastic model. We apply nanoRelease to three ENMs (TiO2, SiO2 and FeOx) used in paints and coatings through seven product applications, including construction and building, household and furniture, and automotive for the period from 2000 to 2020 using production volume and market projection information...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29020944/a-convenient-uhplc-ms-ms-method-for-routine-monitoring-of-plasma-and-brain-levels-of-nicotine-and-cotinine-as-a-tool-to-validate-newly-developed-preclinical-smoking-model-in-mouse
#16
Mohammad A Kaisar, Raja Reddy Kallem, Ravi K Sajja, Ali Ehsan Sifat, Luca Cucullo
BACKGROUND: A sensitive, rapid and selective UHPLC-MS/MS method has been developed and validated for the quantification of Nicotine (NT) and Cotinine (CN) using Continine-d 3 as internal standard (IS) as per FDA guidelines. Sample preparation involved simple protein precipitation of 20 µL mouse plasma or brain homogenate using acetonitrile at 1:8 ratio. Mass Spectrometer was operated in positive polarity under the multiple reaction-monitoring mode using electro spray ionization technique and the transitions of m/z 163...
October 11, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28985995/aerobic-granular-sludge-technology-mechanisms-of-granulation-and-biotechnological-applications
#17
REVIEW
Y V Nancharaiah, G Kiran Kumar Reddy
Aerobic granular sludge (AGS) is a novel microbial community which allows simultaneous removal of carbon, nitrogen, phosphorus and other pollutants in a single sludge system. AGS is distinct from activated sludge in physical, chemical and microbiological properties and offers compact and cost-effective treatment for removing oxidized and reduced contaminants from wastewater. AGS sequencing batch reactors have shown their utility in the treatment of abattoir, live-stock, rubber, landfill leachate, dairy, brewery, textile and other effluents...
September 21, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28985471/reproducible-preparation-of-proteopolymersomes-via-sequential-polymer-film-hydration-and-membrane-protein-reconstitution
#18
Siew-Leng Loo, Winna Siti, Monisha Thiyagarajan, Jaume Torres, Rong Wang, Xiao Hu
Film rehydration method is commonly used for membrane protein (MP) reconstitution into block copolymer (BCP), but the lack of control in the rehydration step formed a heterogeneous population of proteopolymersomes that interferes with the characterization and performance of devices incorporating them. To improve the self-assembly of polymersomes with simultaneous MP reconstitution, the study reported herein aimed to understand the effects of different variants of the rehydration procedure on the MP reconstitution into BCP membranes...
October 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28981534/import-use-and-emissions-of-pcbs-in-switzerland-from-1930-to-2100
#19
Juliane Glüge, Christine Steinlin, Simone Schalles, Lukas Wegmann, Josef Tremp, Knut Breivik, Konrad Hungerbühler, Christian Bogdal
Polychlorinated biphenyls (PCBs) are persistent organic compounds that are ubiquitously found in the environment. Their use and manufacture were restricted or banned in many countries in the 1970-1980s, however, they still persist in the antroposphere, the environment and in biota worldwide today. Conventions like the Convention on Long-range Transboundary Air Pollution encourage or bind the member parties to annually submit emission inventories of regulated air pollutants. Unfortunately, several member states have not yet reported PCB emissions...
2017: PloS One
https://www.readbyqxmd.com/read/28970971/advances-in-the-study-of-nodavirus
#20
Chean Yeah Yong, Swee Keong Yeap, Abdul Rahman Omar, Wen Siang Tan
Nodaviruses are small bipartite RNA viruses which belong to the family of Nodaviridae. They are categorized into alpha-nodavirus, which infects insects, and beta-nodavirus, which infects fishes. Another distinct group of nodavirus infects shrimps and prawns, which has been proposed to be categorized as gamma-nodavirus. Our current review focuses mainly on recent studies performed on nodaviruses. Nodavirus can be transmitted vertically and horizontally. Recent outbreaks have been reported in China, Indonesia, Singapore and India, affecting the aquaculture industry...
2017: PeerJ
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