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https://www.readbyqxmd.com/read/28528503/a-flux-enhancing-forward-osmosis-nanofiltration-integrated-treatment-system-for-the-tannery-wastewater-reclamation
#1
Parimal Pal, Sankha Chakrabortty, Jayato Nayak, Suman Senapati
Effective treatment of tannery wastewater prior to discharge to the environment as per environmental regulations remains a big challenge despite efforts to bring down the concentrations of the pollutants which are often quite high as measured in terms of chemical oxygen demand (7800 mg/L), total dissolved solids (5400 mg/L), chloride (4260 mg/L), sulphides (250 mg/L) and chromium. A pilot-scale forward osmosis and nanofiltration integrated closed loop system was developed for continuous reclamation of clean water from tannery wastewater at a rate of 52-55 L/m(2)/h at 1...
May 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28527379/diagnosing-water-security-in-the-rural-north-with-an-environmental-security-framework
#2
Henry J F Penn, Philip A Loring, William E Schnabel
This study explores the nature of water security challenges in rural Alaska, using a framework for environmental security that entails four interrelated concepts: availability, access, utility, and stability of water resources. Many researchers and professionals agree that water insecurity is a problem in rural Alaska, although the scale and nature of the problem is contested. Some academics have argued that the problem is systemic, and rooted in an approach to water security by the state that prioritizes economic concerns over public health concerns...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28526786/impact-of-acanthamoeba-cysts-on-stress-resistance-of-salmonella-enterica-serovar-typhimurium-yersinia-enterocolitica-4-o-3-listeria-monocytogenes-1-2a-and-escherichia-coli-o-26
#3
Ellen Lambrecht, Julie Baré, Koen Sabbe, Kurt Houf
The formation of robust resting cysts enables Acanthamoeba to resist harsh environmental conditions. This study investigated to what extent these cysts are resistant to physical and chemical stresses as applied in food industry cleaning and disinfection procedures. Moreover it was assessed whether certain intracystic meatborne bacterial pathogens are more stress-resistant than free-living bacterial monocultures and if intracystic passage and subsequent association with trophozoites induces cross-tolerance towards other stressors...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28525274/metal-nanoparticle-catalyzed-hydrogen-generation-from-formic-acid
#4
Zhangpeng Li, Qiang Xu
To meet the ever-increasing energy demand, the development of effective, renewable, and environmentally friendly sources of alternative energy is imperative. Hydrogen (H2) is a renewable, clean energy carrier, which exhibits a threefold energy density compared to gasoline; H2 is considered one of the most promising alternative energy carriers for enabling a secure, clean energy future. However, the realization of a hydrogen economy is restricted by several unresolved issues. Particularly, one of the most difficult challenges is the development of a safe, efficient hydrogen storage and delivery system...
May 19, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28516494/recommendations-for-approaches-to-meticillin-resistant-staphylococcal-infections-of-small-animals-diagnosis-therapeutic-considerations-and-preventative-measures-clinical-consensus-guidelines-of-the-world-association-for-veterinary-dermatology
#5
REVIEW
Daniel O Morris, Anette Loeffler, Meghan F Davis, Luca Guardabassi, J Scott Weese
BACKGROUND: Multiple drug resistance (MDR) in staphylococci, including resistance to the semi-synthetic penicillinase-resistant penicillins such as meticillin, is a problem of global proportions that presents serious challenges to the successful treatment of staphylococcal infections of companion animals. OBJECTIVES: The objective of this document is to provide harmonized recommendations for the diagnosis, prevention and treatment of meticillin-resistant staphylococcal infections in dogs and cats...
June 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28514348/-dynamics-of-immunological-features-of-oral-liquid-in-children-with-chronic-catarrhal-gingivitis-living-on-polluted-territories-with-fluoride-and-iodine-deficiency
#6
N V Malko, E V Besvushko
The aim of the study was to assess the state of oral liquid (OL) immunity in children with chronic catarrhal gingivitis (CCG) living in adverse environmental conditions. 120 children aged 7-15 residing in ecologically unfavorable areas of Lviv region were examined, while 75 children living in 'relatively clean' region were involved in the control group. Chronic catarrhal gingivitis was diagnosed according to Danilevskiy classification (1994). The level of cytokines in oral liquid of 7-years-old children living in ecologically polluted region (EPR), was (198...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28514144/water-purification-using-functionalized-cellulosic-fibers-with-non-leaching-bacteria-adsorbing-properties
#7
Anna Elizabeth Ottenhall, Josefin Illergård, Monica Kerstin Ek
Portable purification systems are easy ways to obtain clean drinking water when there is no large-scale water treatment available. In this study, the potential to purify water using bacteria adsorbing cellulosic fibers, functionalized with polyelectrolytes according to the Layer-by-Layer method, is investigated. The adsorbed polyelectrolytes create a positive charge on the fiber surface that physically attracts and bonds with bacteria. Three types of cellulosic materials have been modified and tested for the bacterial removal capacity in water...
May 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28513755/re-assembled-casein-micelles-improve-in-vitro-bioavailability-of-vitamin-d-in-a-caco-2-cell-model
#8
Yifat Cohen, Moran Levi, Uri Lesmes, Marielle Margier, Emmanuelle Reboul, Yoav D Livney
The pandemic of vitamin D (VD) deficiency, and the global rise in obesity stimulate a need for staple low-fat foods and beverages enriched with VD. In light of consumer demand for a clean label, the use of natural endogenous food ingredients as delivery vehicles is of great interest. To this end, re-assembled casein micelles (rCM) have been shown to help retain VD during processing and shelf life and provide high bioavailability in low-fat milk and non-fat yoghurt. This follow-up study focused on the performance of VD-loaded rCM after drying and reconstitution, considering VD retention during simulated digestion, and the subsequent in vitro bioavailability of the vitamin...
May 17, 2017: Food & Function
https://www.readbyqxmd.com/read/28513298/cleaning-of-lead-smelting-flue-gas-scrubber-sludge-and-recovery-of-lead-selenium-and-mercury-by-hydrometallurgical-route
#9
Peng Xing, Baozhong Ma, Chengyan Wang, Yongqiang Chen
The expansion of non-ferrous metal smelting industry in the recent two decades has resulted in the generation of massive quantities of flue gas scrubber sludge containing hazardous heavy metals, such as cadmium, lead, arsenic, selenium and mercury (Hg), posing a potential environmental threat. In this work, lead smelting flue gas scrubber sludge was treated by a hydrometallurgical process to achieve sludge cleaning and economic recovery of metal values lead, selenium and mercury. The sludge was preliminarily leached by sodium chloride solution to extract lead...
May 17, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28511936/biotechnologies-for-marine-oil-spill-cleanup-indissoluble-ties-with-microorganisms
#10
REVIEW
Francesca Mapelli, Alberto Scoma, Grégoire Michoud, Federico Aulenta, Nico Boon, Sara Borin, Nicolas Kalogerakis, Daniele Daffonchio
The ubiquitous exploitation of petroleum hydrocarbons (HCs) has been accompanied by accidental spills and chronic pollution in marine ecosystems, including the deep ocean. Physicochemical technologies are available for oil spill cleanup, but HCs must ultimately be mineralized by microorganisms. How environmental factors drive the assembly and activity of HC-degrading microbial communities remains unknown, limiting our capacity to integrate microorganism-based cleanup strategies with current physicochemical remediation technologies...
May 13, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28510292/enhanced-photoelectrochemical-activity-by-autologous-cd-cdo-cds-heterojunction-photoanode-with-high-conductivity-and-separation-efficiency
#11
Shilei Xie, Peng Zhang, Min Zhang, Peng Liu, Wei Li, Xihong Lu, Faliang Cheng, Yexiang Tong
The development of hydrogen from solar energy has attracted great attention due to the global demand for clean energy and environment. Herein, autologous Cd/CdO/CdS heterojunctions was prepared by carefully controlling process with the metallic Cd as the inner-layer and CdO as the interlayer. Further research revealed that the transportation and separation of photogenerated pairs were enhanced due to low resistance of Cd inner-layer and the type-II CdO/CdS heterojunction. As a result, the optimized Cd/CdO/CdS heterojunction photoanode showed outstanding and long-term photoelectrochemical activity for the water splitting, with the current density of 3...
May 16, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28508336/the-impacts-of-non-renewable-and-renewable-energy-on-co2-emissions-in-turkey
#12
Umit Bulut
As a result of great increases in CO2 emissions in the last few decades, many papers have examined the relationship between renewable energy and CO2 emissions in the energy economics literature, because as a clean energy source, renewable energy can reduce CO2 emissions and solve environmental problems stemming from increases in CO2 emissions. When one analyses these papers, he/she will observe that they employ fixed parameter estimation methods, and time-varying effects of non-renewable and renewable energy consumption/production on greenhouse gas emissions are ignored...
May 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28506101/evaluation-of-personal-inhalable-aerosol-samplers-with-different-filters-for-use-during-anthrax-responses
#13
Sergey A Grinshpun, Angela M Weber, Michael Yermakov, Reshmi Indugula, Yousef Elmashae, Tiina Reponen, Laura Rose
Risk of inhalation exposure to viable Bacillus anthracis (B. anthracis) spores has primarily been assessed using short-term, stationary sampling methods which may not accurately characterize the concentration of inhalable-sized spores reaching a person's breathing zone. While a variety of aerosol sampling methods have been utilized during previous anthrax responses, no consensus has yet been established for personal air sampling. The goal of this study was to determine the best sampler-filter combination(s) for the collection and extraction of B...
May 16, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28504450/the-influence-of-environmental-management-and-animal-shelters-in-vector-control-of-culicoides-diptera-ceratopogonidae-in-northeastern-brazil
#14
Maria da C A Bandeira, Gustavo A Brito, Adriane da Penha, Ciro L C Santos, José M M Rebêlo
We investigated whether biting midges in peridomestic environments are affected by environmental management practices and the presence of domestic animals. We used CDC light traps to collect midges in 112 residences across 24 locations along tourism routes of Maranhão, Brazil. The collection areas were characterized as follows: i) peridomestic area with domestic animals and without management (dirty); ii) peridomestic with domestic animals and management (clean); iii) peridomestic without animals and with management (clean); iv) peridomestic without animals and without management (dirty)...
June 2017: Journal of Vector Ecology: Journal of the Society for Vector Ecology
https://www.readbyqxmd.com/read/28504182/oil-water-interfaces-of-guar-gum-based-biopolymer-hydrogels-and-application-to-their-separation
#15
Lei Dai, Baobin Wang, Xingye An, Liqiang Zhang, Avik Khan, Yonghao Ni
Oily wastewater treatment has become a significant research subject due to potential environmental related applications, e.g., oil spill remedy process. In this paper, a natural polymer based hydrogel, prepared from guar gum (GG) and metaborate, was coated onto a stainless steel mesh, and the as-prepared hydrogel-coated material was applied for oil/water separation. The strong hydrophilic GG hydrogel imparted excellent underwater oleophobicity and ultra-low oil adhesion. The results proved that the as-prepared GG hydrogel-coated material possessed excellent self-cleaning property and high oil/water separation efficiency...
August 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28488474/prevalence-of-salmonella-spp-in-environmental-samples-from-table-egg-barns-in-alberta
#16
Joan A St Amand, Rashed Cassis, Robin K King, Colleen B Annett Christianson
Some Salmonella spp. are zoonotic, a frequent cause of food borne illness in Canada, and known to infect humans through contaminated poultry and poultry products. Certain serotypes of Salmonella spp. have been demonstrated to be vertically transmitted from hen to egg. The incidence of Salmonella spp. isolation in the flock has been correlated to its isolation from the environment. Twenty-one producers were enrolled in this study to examine the occurrence of Salmonella spp. in 48 table egg layer flocks housed in 35 barns in Alberta...
May 10, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28484809/novel-fast-analytical-method-for-indirect-determination-of-mcpd-fatty-acid-esters-in-edible-oils-and-fats-based-on-simultaneous-extraction-and-derivatization
#17
Renata Jędrkiewicz, Agnieszka Głowacz-Różyńska, Justyna Gromadzka, Piotr Konieczka, Jacek Namieśnik
A novel method for indirect determination of MCPD esters levels in lipid samples has been developed. The method is based on combination of extraction and derivatization in the same sample preparation step. It is achieved by the application of diethyl ether as extraction solvent for isolation of analytes released from esterified forms from the water phase and as dilution solvent for solid PBA - the derivatization agent. It is a noteworthy improvement of recommended indirect approaches available in the literature because such steps as sample clean-up, multiple liquid-liquid extractions, and preconcentration are excluded in the proposed solution...
May 8, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28483367/energy-environmental-and-operation-aspects-of-a-srf-fired-fluidized-bed-waste-to-energy-plant
#18
Sabino De Gisi, Agnese Chiarelli, Luca Tagliente, Michele Notarnicola
A methodology based on the ISO 14031:2013 guideline has been developed and applied to a full-scale fluidized bed waste to energy plant (WtE) burning solid recovered fuel (SRF). With reference to 3years of operation, the data on energy and environmental performance, on raw materials consumptions such as sand and diesel fuel, accidental reasons of plant shutdown, have been acquired and analyzed. The obtained results have allowed to quantify the energy and environmental performance of the WtE plant under investigation by varying the amount and mixings of the inlet waste, available in form of thickened and fluff (similar to coriander) SRF...
May 5, 2017: Waste Management
https://www.readbyqxmd.com/read/28478814/fragrance-compounds-the-wolves-in-sheep-s-clothings
#19
Seema Patel
In the past few decades, synthetic fragrance compounds have become ubiquitous components of personal care and household cleaning products. Overwhelming consumerism trends have led to the excess usage of these chemicals. It has been observed that this fragrance-laden unhealthy lifestyle runs parallel with the unprecedented rates of diabetes, cancer, neural ailments, teratogenicity, and transgender instances. The link between fragrances as and the multiplicity of pathogens remained latent for decades. However, now this health hazard and its role in homeostasis breakdown is getting attention...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28475791/prevention-and-control-of-multidrug-resistant-gram-negative-bacteria-in-adult-intensive-care-units-a-systematic-review-and-network-meta-analysis
#20
Nattawat Teerawattanapong, Kirati Kengkla, Piyameth Dilokthornsakul, Surasak Saokaew, Anucha Apisarnthanarak, Nathorn Chaiyakunapruk
Background: This study evaluated the relative efficacy of strategies for the prevention of multidrug-resistant gram-negative bacteria (MDR-GNB) in adult intensive care units (ICUs). Methods: A systematic review and network meta-analysis was performed; searches of the Cochrane Library, PubMed, Embase, and CINAHL (Cumulative Index to Nursing and Allied Health Literature) included all randomized controlled trials and observational studies conducted in adult patients hospitalized in ICUs and evaluating standard care (STD), antimicrobial stewardship program (ASP), environmental cleaning (ENV), decolonization methods (DCL), or source control (SCT), simultaneously...
May 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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