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https://www.readbyqxmd.com/read/28820592/copper-i-no-g-reductive-coupling-producing-a-trans-hyponitrite-bridged-dicopper-ii-complex-redox-reversal-giving-copper-i-no-g-disproportionation
#1
Gayan B Wijeratne, Shabnam Hematian, Maxime A Siegler, Kenneth D Karlin
A copper complex, [CuI(tmpa)(MeCN)]+, effectively reductively couples NO(g) at RT in methanol, giving a structurally characterized hyponitrito-dicopper(II) adduct. Hydrogen-bonding from MeOH is critical for the hyponitrite complex formation and stabilization. This complex exhibits the reverse redox process in aprotic solvents, giving CuI + NO, leading to CuI-mediated NO disproportionation. The relation-ship of this chemistry to biological iron and/or copper mediated NO reductive coupling to give N2O(g) is discussed...
August 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28818812/airborne-ultrafine-particles-in-a-pacific-island-country-characteristics-sources-and-implications-for-human-exposure
#2
C F Isley, P F Nelson, M P Taylor, M Mazaheri, L Morawska, A J Atanacio, E Stelcer, D D Cohen, Anthony L Morrison
The Pacific Islands carry a perception of having clean air, yet emissions from transport and burning activities are of concern in regard to air quality and health. Ultrafine particle number concentrations (PNCs), one of the best metrics to demonstrate combustion emissions, have not been measured either in Suva or elsewhere in the Islands. This work provides insight into PNC variation across Suva and its relationship with particle mass (PM) concentration and composition. Measurements over a short monitoring campaign provide a vignette of conditions in Suva...
August 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28817260/current-use-flame-retardants-in-the-water-of-lake-michigan-tributaries
#3
Jiehong Guo, Kevin Romanak, Stephen Westenbroek, Ronald A Hites, Marta Venier
In this study, we measured the concentrations of 65 flame retardants in water samples from five Lake Michigan tributaries. These flame retardants included organophosphate esters (OPEs), brominated flame retardants (BFRs), and Dechlorane-related compounds. A total of 59 samples, including both the particulate and the dissolved phases, were collected from the Grand, Kalamazoo, Saint Joseph, and Lower Fox rivers and from the Indiana Harbor and Ship Canal (IHSC) in 2015. OPEs were the most abundant among the targeted compounds with geometric mean concentrations ranging from 20 to 54 ng/L; OPE concentrations were comparable among the five tributaries...
August 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28815050/a-case-of-azoospermia-in-a-non-destructive-testing%C3%A2-worker-exposed-to-radiation
#4
Jaechan Park, Sanggil Lee, Chulyong Park, Huisu Eom
BACKGROUND: Interest in radiation-related health problems has been growing with the increase in the number of workers in radiation-related jobs. Although an occupational level of radiation exposure would not likely cause azoospermia, several studies have reported the relation between radiation exposure and azoospermia after accidental or therapeutic radiation exposure. We describe a case of azoospermia in a non-destructive testing (NDT) worker exposed to radiation and discuss the problems of the related monitoring system...
2017: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28813428/soil-features-in-rookeries-of-antarctic-penguins-reveal-sea-to-land-biotransport-of-chemical-pollutants
#5
Anna C Santamans, Rafael Boluda, Antonio Picazo, Carlos Gil, Joaquín Ramos-Miras, Pablo Tejedo, Luis R Pertierra, Javier Benayas, Antonio Camacho
The main soil physical-chemical features, the concentrations of a set of pollutants, and the soil microbiota linked to penguin rookeries have been studied in 10 selected sites located at the South Shetland Islands and the Antarctic Peninsula (Maritime Antarctica). This study aims to test the hypothesis that biotransport by penguins increases the concentration of pollutants, especially heavy metals, in Antarctic soils, and alters its microbiota. Our results show that penguins do transport certain chemical elements and thus cause accumulation in land areas through their excreta...
2017: PloS One
https://www.readbyqxmd.com/read/28812093/a-convenient-approach-to-facilitate-monitoring-gaucher-disease-progression-and-therapeutic-response
#6
Wujuan Zhang, Melissa Oehrle, Carlos E Prada, Ida Vanessa D Schwartz, Somchai Chutipongtanate, Duangrurdee Wattanasirichaigoon, Venette Inskeep, Mei Dai, Dao Pan, Ying Sun, Kenneth D R Setchell
Gaucher disease (GD) is caused by mutations on the GBA1 gene leading to deficiency in acid β-glucosidase (GCase) and subsequent accumulation of its substrates, glucosylceramide (GlcC) and glucosylsphingosine (GlcS). GlcS in plasma has been proposed as a highly sensitive and specific biomarker for the diagnosis of GD and for monitoring disease progression and response to therapy. Here we report a novel robust and accurate hydrophilic interaction liquid chromatography tandem mass spectrometric method (HILIC-MS/MS) for the direct measurement of glucosylsphingosine (GlcS) in dried plasma spots (DPS)...
August 16, 2017: Analyst
https://www.readbyqxmd.com/read/28808947/the-sydney-heart-bank-improving-translational-research-while-eliminating-or-reducing-the-use-of-animal-models-of-human-heart-disease
#7
REVIEW
C G Dos Remedios, S P Lal, A Li, J McNamara, A Keogh, P S Macdonald, R Cooke, E Ehler, R Knöll, S B Marston, J Stelzer, H Granzier, C Bezzina, S van Dijk, F De Man, G J M Stienen, J Odeberg, F Pontén, W Linke, J van der Velden
The Sydney Heart Bank (SHB) is one of the largest human heart tissue banks in existence. Its mission is to provide high-quality human heart tissue for research into the molecular basis of human heart failure by working collaboratively with experts in this field. We argue that, by comparing tissues from failing human hearts with age-matched non-failing healthy donor hearts, the results will be more relevant than research using animal models, particularly if their physiology is very different from humans. Tissue from heart surgery must generally be used soon after collection or it significantly deteriorates...
August 14, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28808859/best-practices-in-cell-culture-an-overview
#8
John M Baust, Gertrude Case Buehring, Lia Campbell, Eugene Elmore, John W Harbell, Raymond W Nims, Paul Price, Yvonne A Reid, Frank Simione
This overview describes a series of articles to provide an unmet need for information on best practices in animal cell culture. The target audience primarily consists of entry-level scientists with minimal experience in cell culture. It also include scientists, journalists, and educators with some experience in cell culture, but in need of a refresher in best practices. The articles will be published in this journal over a six-month period and will emphasize best practices in: (1) media selection; (2) use and evaluation of animal serum as a component of cell culture medium; (3) receipt of new cells into the laboratory; (4) naming cell lines; (5) authenticating cell line identity; (6) detecting and mitigating risk of cell culture contamination; (7) cryopreservation and thawing of cells; and (8) storing and shipping viable cells...
August 14, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28806547/environmental-life-cycle-assessment-of-seafood-production-a-case-study-of-trawler-catches-in-tunisia
#9
Khaled Abdou, Didier Gascuel, Joël Aubin, Mohamed Salah Romdhane, Frida Ben Rais Lasram, François Le Loc'h
The Gulf of Gabes is one of the most productive fishery areas in the southern Mediterranean Sea. It is archetypal of an ecosystem in which the effects of fisheries are most pronounced. Demersal trawling is the main fishing activity in the Gulf of Gabes. Life Cycle Assessment (LCA) was applied to assess the environmental performance landing 1t of seafood with wooden demersal trawlers in the Gulf of Gabes. Impact categories included in the study were abiotic depletion potential (ADP), acidification potential (AP), eutrophication potential (EP), global warming potential (GWP), ozone depletion potential (ODP), photochemical oxidant formation potential (POFP), human toxicity potential (HTP), marine eco-toxicity potential (METP), terrestrial eco-toxicity potential (TETP), land occupation potential (LOP), and total cumulative energy demand (TCED)...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28800688/monitoring-of-air-pollution-levels-related-to-charilaos-trikoupis-bridge
#10
D A Sarigiannis, E J Handakas, M Kermenidou, I Zarkadas, A Gotti, P Charisiadis, K Makris, M Manousakas, K Eleftheriadis, S P Karakitsios
Charilaos Trikoupis bridge is the longest cable bridge in Europe that connects Western Greece with the rest of the country. In this study, six air pollution monitoring campaigns (including major regulated air pollutants) were carried out from 2013 to 2015 at both sides of the bridge, located in the urban areas of Rio and Antirrio respectively. Pollution data were statistically analyzed and air quality was characterized using US and European air quality indices. From the overall campaign, it was found that air pollution levels were below the respective regulatory thresholds, but once at the site of Antirrio (26...
August 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28800634/utilizing-the-r-v-marcus-g-langseth-s-streamer-to-measure-the-acoustic-radiation-of-its-seismic-source-in-the-shallow-waters-of-new-jersey-s-continental-shelf
#11
Timothy J Crone, Maya Tolstoy, James C Gibson, Gregory Mountain
Shallow water marine seismic surveys are necessary to understand a range of Earth processes in coastal environments, including those that represent major hazards to society such as earthquakes, tsunamis, and sea-level rise. Predicting the acoustic radiation of seismic sources in shallow water, which is required for compliance with regulations designed to limit impacts on protected marine species, is a significant challenge in this environment because of variable reflectivity due to local geology, and the susceptibility of relatively small bathymetric features to focus or shadow acoustic energy...
2017: PloS One
https://www.readbyqxmd.com/read/28799617/long-range-transport-clusters-and-positive-matrix-factorization-source-apportionment-for-investigating-transboundary-pm2-5-in-gothenburg-sweden
#12
Peter Molnár, Lin Tang, Karin Sjöberg, Janine Wichmann
Source apportionment studies of particulate matter are common and have been performed either as source region analyses using air mass back trajectories or by source type using source apportionment techniques. By combining the two approaches, it is possible to estimate the relative importance of emitters in different regions. PM2.5 samples were collected in Gothenburg between September 2008 and September 2009. The mean daily PM2.5 level was 6.1 μg m(-3) (range 0.79-30.91 μg m(-3)). Elemental analyses were done using Energy dispersive X-ray fluorescence (EDXRF) spectroscopy...
August 11, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28798735/phenotypic-heterogeneity-in-attachment-of-marine-bacteria-toward-antifouling-copolymers-unraveled-by-afm
#13
Sofiane El-Kirat-Chatel, Aurore Puymege, The H Duong, Perrine Van Overtvelt, Christine Bressy, Lénaïk Belec, Yves F Dufrêne, Maëlle Molmeret
Up to recent years, bacterial adhesion has mostly been evaluated at the population level. Single cell level has improved in the past few years allowing a better comprehension of the implication of individual behaviors as compared to the one of a whole community. A new approach using atomic force microscopy (AFM) to measure adhesion forces between a live bacterium attached via a silica microbead to the AFM tipless cantilever and the surface has been recently developed. The objectives of this study is to examine the bacterial adhesion to a surface dedicated to ship hulls at the population and the cellular level to understand to what extent these two levels could be correlated...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28796791/evaluating-turnaround-times-for-early-infant-diagnosis-samples-in-kenya-from-2011-2014-a-retrospective-analysis-of-hitsystem-program-data
#14
Catherine Wexler, An-Lin Cheng, Brad Gautney, Sarah Finocchario-Kessler, Kathy Goggin, Samoel Khamadi
Long turnaround times (TAT) for the processing and posting of results of infant HIV DNA PCR samples can hinder the success of early infant diagnosis (EID) programs. The HITSystem is an eHealth intervention that alerts staff when services are overdue or results are delayed. We conducted a retrospective analysis of 3669 HIV-exposed infants enrolled in 15 Kenya hospital EID programs and three laboratories using the HITSystem from 2011-2014. We assessed mean and median TAT from when a sample was: 1) obtained to when it was shipped to the laboratory, 2) shipped to when it was received at the laboratory, 3) received to when a result was posted, and 4) the total time from obtaining the sample (step 1) to posting the result (step 3)...
2017: PloS One
https://www.readbyqxmd.com/read/28796311/predicting-the-risk-of-biological-invasions-using-environmental-similarity-and-transport-network-connectedness
#15
Robert C Cope, Joshua V Ross, Talia A Wittmann, Michael J Watts, Phillip Cassey
Understanding the risk of biological invasions associated with particular transport pathways and source regions is critical for implementing effective biosecurity management. This may require both a model for physical connectedness between regions, and a measure of environmental similarity, so as to quantify the potential for a species to be transported from a given region and to survive at a destination region. We present an analysis of integrated biosecurity risk into Australia, based on flights and shipping data from each global geopolitical region, and an adaptation of the "range bagging" method to determine environmental matching between regions...
August 10, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28793241/the-activity-based-methodology-to-assess-ship-emissions-a-review
#16
REVIEW
R A O Nunes, M C M Alvim-Ferraz, F G Martins, S I V Sousa
Several studies tried to estimate atmospheric emissions with origin in the maritime sector, concluding that it contributed to the global anthropogenic emissions through the emission of pollutants that have a strong impact on hu' health and also on climate change. Thus, this paper aimed to review published studies since 2010 that used activity-based methodology to estimate ship emissions, to provide a summary of the available input data. After exclusions, 26 articles were analysed and the main information were scanned and registered, namely technical information about ships, ships activity and movement information, engines, fuels, load and emission factors...
August 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28792888/structural-basis-for-interdomain-communication-in-ship2-providing-high-phosphatase-activity
#17
Johanne Le Coq, Marta Camacho-Artacho, José Vicente Velázquez, Clara M Santiveri, Luis Heredia Gallego, Ramón Campos-Olivas, Nicole Dölker, Daniel Lietha
SH2-containing-inositol-5-phosphatases (SHIPs) dephosphorylate the 5-phosphate of phosphatidylinositol-3,4,5-trisphosphate (PI(3,4,5)P3) and play important roles in regulating the PI3K/Akt pathway in physiology and disease. Aiming to uncover interdomain regulatory mechanisms in SHIP2, we determined crystal structures containing the 5-phosphatase and a proximal region adopting a C2 fold. This reveals an extensive interface between the two domains, which results in significant structural changes in the phosphatase domain...
August 9, 2017: ELife
https://www.readbyqxmd.com/read/28792237/a-new-flow-through-bioassay-for-testing-low-emission-antifouling-coatings
#18
Christian Pansch, Per R Jonsson, Mattias Berglin, Emiliano Pinori, Anna-Lisa Wrange
Current antifouling (AF) technologies are based on the continuous release of biocides into the water, and consequently discharge into the environment. Major efforts to develop more environmentally friendly coatings require efficient testing in laboratory assays, followed by field studies. Barnacles are important fouling organisms worldwide, increasing hydrodynamic drag on ships and damaging coatings on underwater surfaces, and thus are extensively used as models in AF research, mostly in static, laboratory-based systems...
August 9, 2017: Biofouling
https://www.readbyqxmd.com/read/28782459/leptospira-spp-vaccinal-antibodies-do-not-react-with-borrelia-burgdorferi-peptides-used-in-the-accuplex-4
#19
Amber L Caress, Scott Moroff, Michael R Lappin
We attempted to determine if Leptospira spp. antibodies induced by vaccination would cross-react with Borrelia burgdorferi antigens used in a commercial automated immunofluorescent assay (AccuPlex 4 BioCD; Antech). Staff- and student-owned dogs ( n = 31) were recruited at a veterinary teaching hospital in a B. burgdorferi nonendemic area. The dogs were randomized and administered 1 of 4 commercial Leptospira spp. vaccines that contained serovars Canicola, Grippotyphosa, Icterohaemorrhagiae, and Pomona, then booster vaccinated 3 wk later...
August 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28781184/contaminants-of-emerging-concern-in-the-open-sea-waters-of-the-western-mediterranean
#20
Miroslav Brumovský, Jitka Bečanová, Jiří Kohoutek, Mireno Borghini, Luca Nizzetto
Pollution by chemical substances is of concern for the maintenance of healthy and sustainable aquatic environments. While the occurrence and fate of numerous emerging contaminants, especially pharmaceuticals, is well documented in freshwater, their occurrence and behavior in coastal and marine waters is much less studied and understood. This study investigates the occurrence of 58 chemicals in the open surface water of the Western Mediterranean Sea for the first time. 70 samples in total were collected in 10 different sampling areas...
August 3, 2017: Environmental Pollution
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