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https://www.readbyqxmd.com/read/28934676/simultaneous-biofiltration-of-btex-and-hg%C3%A2-from-a-petrochemical-waste-stream
#1
Mostafa Leili, Sima Farjadfard, George A Sorial, Bahman Ramavandi
A biofiltration system was developed to treat benzene, toluene, ethylbenzene, and xylene (BTEX) and Hg° vapour from a petrochemical waste stream during overhaul maintenance. The biofilter compost bed was inoculated with a microbial consortium provided by a petrochemical wastewater treatment plant. The effect of the a BTEX concentration (192.6-973.8 g/m(3)h) and empty bed residence time (EBRT) of 20-100 s were studied under the conditions of steady state, transient, shock BTEX-loading, and off-restart. The findings revealed that during a biofilter start-up, an increase in the influent BTEX concentration to around 334...
September 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28934673/an-analysis-of-chemicals-and-other-constituents-found-in-produced-water-from-hydraulically-fractured-wells-in-california-and-the-challenges-for-wastewater-management
#2
Emily A Chittick, Tanja Srebotnjak
As high-volume hydraulic fracturing (HF) has grown substantially in the United States over the past decade, so has the volume of produced water (PW), i.e., briny water brought to the surface as a byproduct of oil and gas production. According to a recent study (Groundwater Protection Council, 2015), more than 21 billion barrels of PW were generated in 2012. In addition to being high in TDS, PW may contain hydrocarbons, PAH, alkylphenols, naturally occurring radioactive material (NORM), metals, and other organic and inorganic substances...
September 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28934352/global-reaction-to-the-recent-outbreaks-of-zika-virus-insights-from-a-big-data-analysis
#3
Nicola Luigi Bragazzi, Cristiano Alicino, Cecilia Trucchi, Chiara Paganino, Ilaria Barberis, Mariano Martini, Laura Sticchi, Eugen Trinka, Francesco Brigo, Filippo Ansaldi, Giancarlo Icardi, Andrea Orsi
OBJECTIVE: The recent spreading of Zika virus represents an emerging global health threat. As such, it is attracting public interest worldwide, generating a great amount of related Internet searches and social media interactions. The aim of this research was to understand Zika-related digital behavior throughout the epidemic spreading and to assess its consistence with real-world epidemiological data, using a behavioral informatics and analytics approach. METHODS: In this study, the global web-interest and reaction to the recently occurred outbreaks of the Zika Virus were analyzed in terms of tweets and Google Trends (GT), Google News, YouTube, and Wikipedia search queries...
2017: PloS One
https://www.readbyqxmd.com/read/28934127/removal-of-phenolic-compounds-from-water-using-sewage-sludge-based-activated-carbon-adsorption-a-review
#4
REVIEW
Nuhu Dalhat Mu'azu, Nabeel Jarrah, Mukarram Zubair, Omar Alagha
Due to their industrial relevance, phenolic compounds (PC) are amongst the most common organic pollutants found in many industrial wastewater effluents. The potential detrimental health and environmental impacts of PC necessitate their removal from wastewater to meet regulatory discharge standards to ensure meeting sustainable development goals. In recent decades, one of the promising, cost-effective and environmentally benign techniques for removal of PC from water streams has been adsorption onto sewage sludge (SS)-based activated carbon (SBAC)...
September 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28934091/association-between-exposure-to-p-p-ddt-and-its-metabolite-p-p-dde-with-obesity-integrated-systematic-review-and-meta-analysis
#5
REVIEW
German Cano-Sancho, Andrew G Salmon, Michele A La Merrill
BACKGROUND: The prevalence of obesity is increasing in all countries, becoming a substantial public health concern worldwide. Increasing evidence has associated obesity with persistent pollutants such as the pesticide DDT and its metabolite p,p'-DDE. OBJECTIVES: Our objective was to systematically review the literature on the association between exposure to the pesticide DDT and its metabolites and obesity to develop hazard identification conclusions. METHODS: We applied a systematic review-based strategy to identify and integrate evidence from epidemiological, in vivo, and in vitro studies...
September 18, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28933925/geotagged-us-tweets-as-predictors-of-county-level-health-outcomes-2015-2016
#6
Quynh C Nguyen, Matt McCullough, Hsien-Wen Meng, Debjyoti Paul, Dapeng Li, Suraj Kath, Geoffrey Loomis, Elaine O Nsoesie, Ming Wen, Ken R Smith, Feifei Li
OBJECTIVES: To leverage geotagged Twitter data to create national indicators of the social environment, with small-area indicators of prevalent sentiment and social modeling of health behaviors, and to test associations with county-level health outcomes, while controlling for demographic characteristics. METHODS: We used Twitter's streaming application programming interface to continuously collect a random 1% subset of publicly available geo-located tweets in the contiguous United States...
September 21, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28933900/construction-and-updating-of-event-models-in-auditory-event-processing
#7
Markus Huff, Annika E Maurer, Irina Brich, Anne Pagenkopf, Florian Wickelmaier, Frank Papenmeier
Humans segment the continuous stream of sensory information into distinct events at points of change. Between 2 events, humans perceive an event boundary. Present theories propose changes in the sensory information to trigger updating processes of the present event model. Increased encoding effort finally leads to a memory benefit at event boundaries. Evidence from reading time studies (increased reading times with increasing amount of change) suggest that updating of event models is incremental. We present results from 5 experiments that studied event processing (including memory formation processes and reading times) using an audio drama as well as a transcript thereof as stimulus material...
September 21, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28933892/erasing-and-blurring-memories-the-differential-impact-of-interference-on-separate-aspects-of-forgetting
#8
Sol Z Sun, Celia Fidalgo, Morgan D Barense, Andy C H Lee, Jonathan S Cant, Susanne Ferber
Interference disrupts information processing across many timescales, from immediate perception to memory over short and long durations. The widely held similarity assumption states that as similarity between interfering information and memory contents increases, so too does the degree of impairment. However, information is lost from memory in different ways. For instance, studied content might be erased in an all-or-nothing manner. Alternatively, information may be retained but the precision might be degraded or blurred...
September 21, 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28933841/supramolecular-self-assembly-and-dual-switch-vapochromic-vapoluminescent-and-resistive-memory-behaviors-of-amphiphilic-platinum-ii-complexes
#9
Yongguang Li, Ling Chen, Yeye Ai, Eugene Yau-Hin Hong, Alan Kwun-Wa Chan, Vivian Wing-Wah Yam
A series of amphiphilic platinum(II) complexes with tridentate N-donor ligands has been synthesized and characterized. Different supramolecular architectures are constructed using the amphiphilic molecules as the building blocks through the formation of Pt···Pt and π-π stacking interactions in aqueous media. The aggregation-deaggregation-aggregation self-assembly behavior together with obvious spectroscopic changes could be fine-tuned by the addition of THF in aqueous media. More interestingly, one of the complexes is found to show fast response and high selectivity toward alcohol and water vapors with good reversibility, leading to drastic color and luminescence changes, and hence unique dual switching behavior, with the water molecules readily displaced by the alcohol vapor...
September 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28933795/microfluidic-production-of-nanoscale-perfluorocarbon-droplets-as-liquid-contrast-agents-for-ultrasound-imaging
#10
Xiaonan Xu, Ruyuan Song, Minghao He, Chuan Peng, Miao Yu, Youmin Hou, Huihe Qiu, Ruhai Zou, Shuhuai Yao
Liquid perfluorocarbon (PFC) nanodroplets may have a better chance to extravasate through inter-endothelial gaps (400-800 nm) into tumor interstitium for extravascular imaging, which holds promise as an innovative strategy for imaging-guided drug delivery, early diagnosis of cancer and minimally invasive treatment of cancer. Currently available emulsion technologies still face challenges in reducing droplet sizes from the microscale to the nanoscale. To control size and ensure monodispersity of PFC nanodroplets, we developed a flame-shaped glass capillary and polydimethylsiloxane (PDMS) hybrid device that creates a concentric flow of the dispersed phase enclosed by the focusing continuous phase at the cross-junction...
September 21, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28933674/critical-healthcare-management-studies-green-shoots
#11
Martin Kitchener, Aoife M McDermott, Simon Cooper
Purpose While critical approaches have enriched research in proximate fields, their impact has been less marked in studies of healthcare management. In response, the 2016 Organizational Behaviour in Health Care Conference hosted its first-ever session dedicated to the emergent field of critical healthcare management studies (CHMSs). The purpose of this paper is to present five papers selected from that conference. Design/methodology/approach In this introductory paper, the authors frame the contributions as "green shoots" in a field of CHMS which contains four main furrows of activity: questioning the taken-for-granted; moving beyond instrumentalism; reflexivity and meanings in research; and challenging structures of domination (Kitchener and Thomas, 2016)...
August 21, 2017: Journal of Health Organization and Management
https://www.readbyqxmd.com/read/28933296/inflammation-and-cancer-in-medio-stat-nano
#12
Roberto Molinaro, Claudia Corbo, Megan Livingston, Michael Evangelopoulos, Alessandro Parodi, Christian Boada, Marco Agostini, Ennio Tasciotti
Cancer treatment still remains a challenge due to the several limitations of currently used chemotherapeutics, such as their poor pharmacokinetics, unfavorable chemical properties, as well as inability to discriminate between healthy and diseased tissue. Nanotechnology offered potent tools to overcome these limitations. Drug encapsulation within a delivery system permitted i) to protect the payload from enzymatic degradation/inactivation in the blood stream, ii) to improve the physicochemical properties of poorly water-soluble drugs, like paclitaxel, and iii) to selectively deliver chemotherapeutics to the cancer lesions, thus reducing the off-target toxicity, and promoting the intracellular internalization...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28932257/a-novel-method-for-multiple-bowel-injuries-a-pilot-canine-experiment
#13
Jun Ke, Weihang Wu, Nan Lin, Weijin Yang, Zhicong Cai, Wei Wu, Dongsheng Chen, Yu Wang
BACKGROUND: Intestinal ligation is the cornerstone for damage control in abdominal emergency, yet it may lead to bowel ischemia. Although intestinal ligation avoids further peritoneal cavity pollution, it may lead to an increased pressure within the bowel segments and rapid bacterial translocation. In this study, we showed that severed intestine could be readily reconnected by using silicon tubes and be secured by using rubber bands in a canine model. METHODS: Adult Beagle dogs, subject to multiple intestinal transections and hemorrhagic shock by exsanguination, randomly received conventional ligation vs...
2017: World Journal of Emergency Surgery: WJES
https://www.readbyqxmd.com/read/28932200/is-increased-intracellular-calcium-in-red-blood-cells-a-common-component-in-the-molecular-mechanism-causing-anemia
#14
Laura Hertz, Rick Huisjes, Esther Llaudet-Planas, Polina Petkova-Kirova, Asya Makhro, Jens G Danielczok, Stephane Egee, Maria Del Mar Mañú-Pereira, Richard van Wijk, Joan-Lluis Vives Corrons, Anna Bogdanova, Lars Kaestner
For many hereditary disorders, although the underlying genetic mutation may be known, the molecular mechanism leading to hemolytic anemia is still unclear and needs further investigation. Previous studies revealed an increased intracellular Ca(2+) in red blood cells (RBCs) from patients with sickle cell disease, thalassemia, or Gardos channelopathy. Therefore we analyzed RBCs' Ca(2+) content from 35 patients with different types of anemia (16 patients with hereditary spherocytosis, 11 patients with hereditary xerocytosis, 5 patients with enzymopathies, and 3 patients with hemolytic anemia of unknown cause)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28931901/geochemical-and-microbial-community-attributes-in-relation-to-hyporheic-zone-geological-facies
#15
Z Hou, W C Nelson, J C Stegen, C J Murray, E Arntzen, A R Crump, D W Kennedy, M C Perkins, T D Scheibe, J K Fredrickson, J M Zachara
The hyporheic zone (HZ) is the active ecotone between the surface stream and groundwater, where exchanges of nutrients and organic carbon have been shown to stimulate microbial activity and transformations of carbon and nitrogen. To examine the relationship between sediment texture, biogeochemistry, and biological activity in the Columbia River HZ, the grain size distributions for sediment samples were characterized to define geological facies, and the relationships among physical properties of the facies, physicochemical attributes of the local environment, and the structure and activity of associated microbial communities were examined...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931880/us-power-production-at-risk-from-water-stress-in-a-changing-climate
#16
Poulomi Ganguli, Devashish Kumar, Auroop R Ganguly
Thermoelectric power production in the United States primarily relies on wet-cooled plants, which in turn require water below prescribed design temperatures, both for cooling and operational efficiency. Thus, power production in US remains particularly vulnerable to water scarcity and rising stream temperatures under climate change and variability. Previous studies on the climate-water-energy nexus have primarily focused on mid- to end-century horizons and have not considered the full range of uncertainty in climate projections...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931793/itai-itai-disease-lessons-from-the-investigations-of-environmental-epidemiology-conducted-in-the-1970-s-with-special-reference-to-the-studies-of-the-toyama-institute-of-health
#17
Keiko Aoshima
The outbreak of itai-itai disease, which is the most severe stage of chronic cadmium poisoning, has occurred in the cadmium-polluted Jinzu River basin in Toyama. In this area, the river was contaminated by slags from a mine upstream; consequently, the soil in rice paddies became polluted with heavy metals including cadmium through irrigation water streams from around 1910 to the 1960s. The inhabitants of the Jinzu River basin used the river water for drinking and cooking until around 1960. In this paper, we review the geographical features of the Jinzu River basin and the endemic area of itai-itai disease, and reevaluated the studies conducted in 1970's by the Toyama Institute of Health, because these studies have revealed a clear relationship between renal dysfunction or occurrence of itai-itai disease and exposure to cadmium through irrigation water streams...
2017: Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene
https://www.readbyqxmd.com/read/28930571/role-of-pericytes-in-vascular-immunosurveillance
#18
Konstantin Stark, Kami Pekayvaz, Steffen Massberg
Pericytes build together with endothelial cells the microvascular vessel wall. They have been mainly implicated in angiogenesis and maintenance of the blood brain barrier, but there is accumulating evidence for an immunological function of pericytes. Occupying a strategic position between the blood stream and the interstitial space, pericytes are able to sense environmental cues from both sides in an organ-specific manner and serve as gatekeepers for innate immune cells. In addition, pericytes are able to interact with leukocytes mediated by adhesion molecules as well as chemokines and are involved from the development of leukocytes in the bone marrow to their migration to injured or infected areas in target tissues...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28930136/methanol-extract-from-anogeissus-leiocarpus-dc-guill-et-perr-combretaceae-stem-bark-quenches-the-quorum-sensing-of-pseudomonas-aeruginosa-pao1
#19
Vincent Ouedraogo, Martin Kiendrebeogo
Background: Due to its extensive arsenal of virulence factors and inherent resistance to antibiotics, Pseudomonas aeruginosa is a threat particularly in immunocompromised patients. Considering the central role of quorum sensing in the production of virulence factors, inhibition of bacterial communication mechanism constitute an opportunity to attenuate pathogenicity of bacteria resistant to available antibiotics. Our study aimed to assess the anti-quorum sensing activity of Anogeissus leiocarpus, traditionally used in Burkina Faso, for the treatment of infected burn wounds...
October 6, 2016: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28929959/-in-vitro-effect-of-vancomycin-and-daptomycin-on-biofilm-formation-of-coagulase-negative-staphylococci-strains
#20
Duygu Nilüfer Öcal, İştar Dolapçı, Zeynep Gençtürk, Alper Tekeli
Coagulase-negative staphylococci (CNS) are one of the primer agents of blood stream infections (BSI) and catheter-related bloodstream infections (CR-BSI) which are associated mostly with the usage of central venous catheters and, important causes of morbidity and mortality despite the usage of antibacterial and supportive treatment. It is important to determine the properties of these causative microorganisms in order to make appropriate treatment of such infections. The aims of our study were to evaluate the biofilm formation of coagulase negative staphylococci (CNS) which were causative agents of bloodstream (BSI) and catheter related bloodstream infections (CR-BSI), to determine the minimum inhibitory concentration (MIC) of planktonic forms and minimal biofilm eradication concentration (MBEC) of sessile forms for vancomycin and daptomycin and to evaluate the efficacy of these antibiotics in infections with biofilm-forming isolates in vitro...
July 2017: Mikrobiyoloji Bülteni
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