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https://www.readbyqxmd.com/read/28738613/a-selective-distance-based-paper-analytical-device-for-copper-ii-determination-using-a-porphyrin-derivative
#1
Rimadani Pratiwi, Michael P Nguyen, Slamet Ibrahim, Naoki Yoshioka, Charles S Henry, Daryono H Tjahjono
Meso-tetrakis(1,2-dimethylpyrazolium-4-yl)porphyrin sulfonate (TDMPzP), a water-soluble porphyrin derivative, was synthesized and used as a colorimetric reagent for Cu(2+) detection on a microfluidic paper-based analytical device (µPAD) using distance-based quantification. TDMPzP showed a high selectivity for Cu(2+) detection in aqueous solutions. When Cu(2+) was added to the TDMPzP under acidic conditions, a color change from green to a pink was observed by the naked eye. Under optimized conditions, the application of this system to a distance-based μPAD exhibited good analytical response...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738605/rapid-one-pot-synthesis-of-mmta-protected-fluorescent-gold-nanoclusters-for-selective-and-sensitive-detection-of-ferric-ion
#2
Jingjing Jiang, Pengfei Gao, Yan Zhang, Guomei Zhang, Ying Zhou, Chuan Dong, Shaomin Shuang
Herein, we demonstrate a straightforward synthesis of fluorescent gold nanoclusters (AuNCs), employing 2-Mercapto-4-methyl-5-thiazoleacetic acid (MMTA) as a reducing and protecting agent by a rapid one-pot synthesis method with a short time of 20min. The as-synthesized MMTA-AuNCs exhibited bright blue emission with a strong peak centered at 430nm and the quantum yield (QY) was evaluated to be 4.0%. Based on the fluorescence quenching mechanism of a surface chelating reaction between MMTA and ferric ion (Fe(3+)), the MMTA-AuNCs were exploited as a fluorescence sensor for sensitive and selective detection of Fe(3+)...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738262/systematic-review-of-community-health-impacts-of-mountaintop-removal-mining
#3
REVIEW
Abee L Boyles, Robyn B Blain, Johanna R Rochester, Raghavendhran Avanasi, Susan B Goldhaber, Sofie McComb, Stephanie D Holmgren, Scott A Masten, Kristina A Thayer
BACKGROUND: The objective of this evaluation is to understand the human health impacts of mountaintop removal (MTR) mining, the major method of coal mining in and around Central Appalachia. MTR mining impacts the air, water, and soil and raises concerns about potential adverse health effects in neighboring communities; exposures associated with MTR mining include particulate matter (PM), polycyclic aromatic hydrocarbons (PAHs), metals, hydrogen sulfide, and other recognized harmful substances...
July 21, 2017: Environment International
https://www.readbyqxmd.com/read/28738197/tracking-changes-in-composition-and-amount-of-dissolved-organic-matter-throughout-drinking-water-treatment-plants-by-comprehensive-two-dimensional-gas-chromatography-quadrupole-mass-spectrometry
#4
Chunmei Li, Donghong Wang, Xiong Xu, Meijia Xu, Zijian Wang, Ruiyang Xiao
Dissolved organic matter (DOM) can affect the performance of water treatment processes and produce undesirable disinfection by-products during disinfection. Several studies have been undertaken on the structural characterization of DOM, but its fate during drinking water treatment processes is still not fully understood. In this work, the nontargeted screening method of comprehensive two-dimensional gas chromatography-quadrupole mass spectrometry (GC×GC-qMS) was used to reveal the detailed changes of different chemical classes of compounds in DOM during conventional and advanced drinking water treatment processes at three drinking water treatment plants in China...
July 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738172/impact-of-polymeric-membrane-breakage-on-drinking-water-quality-and-an-online-detection-method-of-the-breakage
#5
Qilong Wu, Zhenghua Zhang, Guodong Cao, Xihui Zhang
Polymeric membrane has been widely used for the treatment of drinking water in China, and the total treating capacity has reached up to 3.8 million m(3)/d. However, the membrane breakage found in the membrane modules in many water treatment plants resulted in an increase in turbidity and bacterial amount in the membrane permeate. In this study, a membrane module running for 3 years in a full-scale application was examined in terms of the breaking positions and the numbers of the broken fibers. It was found that most of the breaking positions were mainly on the outlet side of the module and that the distance from these points to the outlet was about 1/10-2/10 length of the membrane module...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28737697/worldwide-regulations-of-standard-values-of-pesticides-for-human-health-risk-control-a-review
#6
REVIEW
Zijian Li, Aaron Jennings
Abstract: The impact of pesticide residues on human health is a worldwide problem, as human exposure to pesticides can occur through ingestion, inhalation, and dermal contact. Regulatory jurisdictions have promulgated the standard values for pesticides in residential soil, air, drinking water, and agricultural commodity for years. Until now, more than 19,400 pesticide soil regulatory guidance values (RGVs) and 5400 pesticide drinking water maximum concentration levels (MCLs) have been regulated by 54 and 102 nations, respectively...
July 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28736617/an-investigation-of-desalination-by-nanofiltration-reverse-osmosis-and-integrated-hybrid-nf-ro-membranes-employed-in-brackish-water-treatment
#7
M Talaeipour, J Nouri, A H Hassani, A H Mahvi
BACKGROUND: As an appropriate tool, membrane process is used for desalination of brackish water, in the production of drinking water. The present study aims to investigate desalination processes of brackish water of Qom Province in Iran. METHODS: This study was carried out at the central laboratory of Water and Wastewater Company of the studied area. To this aim, membrane processes, including nanofiltration (NF) and reverse osmosis (RO), separately and also their hybrid process were applied...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28735468/the-effect-of-water-contamination-and-host-related-factors-on-ectoparasite-load-in-an-insectivorous-bat
#8
Carmi Korine, Shai Pilosof, Amit Gross, Juan B Morales-Malacara, Boris R Krasnov
We examined the effects of sex, age, and reproductive state of the insectivorous bat Pipistrellus kuhlii on the abundance and prevalence of arthropod ectoparasites (Macronyssidae and Cimicidae) in habitats with either sewage-polluted or natural bodies of water, in the Negev Desert, Israel. We chose water pollution as an environmental factor because of the importance of water availability in desert environments, particularly for P. kuhlii, which needs to drink on a daily basis. We predicted that parasite infestation rates would be affected by both environment and demographic cohort of the host...
July 22, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28735434/quality-assessment-of-groundwater-from-the-south-eastern-arabian-peninsula
#9
H W Zhang, Y Q Sun, Y Li, X D Zhou, X Z Tang, P Yi, A Murad, S Hussein, D Alshamsi, A Aldahan, Z B Yu, X G Chen, V D P Mugwaneza
Assessment of groundwater quality plays a significant role in the utilization of the scarce water resources globally and especially in arid regions. The increasing abstraction together with man-made contamination and seawater intrusion have strongly affected groundwater quality in the Arabia Peninsula, exemplified by the investigation given here from the United Arab Emirates, where the groundwater is seldom reviewed and assessed. In the aim of assessing current groundwater quality, we here present a comparison of chemical data linked to aquifers types...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28734959/removal-of-both-n-nitrosodimethylamine-and-trihalomethanes-precursors-in-a-single-treatment-using-ion-exchange-resins
#10
Wilson Beita-Sandí, Tanju Karanfil
Drinking water utilities are relying more than ever on water sources impacted by wastewater effluents. Disinfection/oxidation of these waters during water treatment may lead to the formation of several disinfection by-products, including the probable human carcinogen N-nitrosodimethylamine (NDMA) and the regulated trihalomethanes (THMs). In this study, the potential of ion exchange resins to control both NDMA and THMs precursors in a single treatment is presented. Two ion exchange resins were examined, a cation exchange resin (Plus) to target NDMA precursors and an anion exchange resin (MIEX) for THMs precursors control...
July 14, 2017: Water Research
https://www.readbyqxmd.com/read/28734354/determination-of-aqueous-antibiotic-solutions-using-sers-nanogratings
#11
Koh Yiin Hong, Carlos Diego Lima de Albuquerque, Ronei J Poppi, Alexandre G Brolo
The emergence of antibiotics and their active metabolites in aquatic ecosystem has motivated the development of sensitive and reliable sensors to monitor traces of antibiotics and metabolites in drinking water sources (i.e. surface water). The surface enhanced Raman scattering (SERS) technique, which is widely recognized as a high sensitivity method for molecular vibrational detection, is potentially a powerful tool for trace environmental contamination analysis. The main goal of this work is to demonstrate pharmaceutical and metabolite multiplexing detection using the SERS approach...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734215/dna-damage-and-cytotoxicity-induced-on-common-carp-by-pollutants-in-water-from-an-urban-reservoir-mad%C3%A3-n-reservoir-a-case-study
#12
I Pérez-Coyotl, C Martínez-Vieyra, M Galar-Martínez, L M Gómez-Oliván, S García-Medina, H Islas-Flores, R Pérez-Pasten Borja, E Gasca-Pérez, K A Novoa-Luna, O Dublán-García
Madín Reservoir provides a substantial amount of drinking water to two municipalities close to Mexico City metropolitan area. However, it receives untreated wastewater discharges from domestic sources in the towns of Nuevo Madín and others, as well as diverse pollutants which are hauled by the Río Tlalnepantla from its upper reaches, so that the xenobiotics in the reservoir are highly diverse in terms of type and quantity. Previous studies showed that MR is contaminated with xenobiotics such as Al, Hg and Fe, as well as NSAIDs, at concentrations exceeding the limits established for aquatic life protection...
July 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28733636/pi3k-p85%C3%AE-subunit-deficient-macrophages-protect-mice-from-acute-colitis-due-to-the-enhancement-of-il-10-production
#13
Shusaku Hayashi, Takayuki Hamada, Donald G A Zinsou, Momoe Oshiro, Kana Itoi, Takeshi Yamamoto, Makoto Kadowaki
We investigated the role of the PI3K p85α subunit in the development of acute colitis with a focus on intestinal macrophages. Experimental acute colitis was induced using 3% dextran sulfate sodium (DSS) in drinking water for 7 days. The severity of DSS-induced acute colitis was significantly attenuated in p85α hetero-deficient (p85α+/-) mice compared with WT mice. The expression of proinflammatory mediators in intestinal macrophages isolated from the inflamed colonic mucosa was significantly suppressed in p85α+/- colitis mice compared with WT colitis mice...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28732533/spatial-and-temporal-patterns-of-diarrhoea-in-bhutan-2003-2013
#14
Kinley Wangdi, Archie Ca Clements
BACKGROUND: To describe spatiotemporal patterns of diarrhoea in Bhutan, and quantify the association between climatic factors and the distribution and dynamics of the disease. METHODS: Nationwide data on diarrhoea were obtained for 2003 to 2013 from the Health Information and Management System (HIMS), Ministry of Health, Bhutan. Climatic variables were obtained from the Department of Hydro Met Services, Ministry of Economic Affairs, Bhutan. Seasonal trend decomposition was used to examine secular trends and seasonal patterns of diarrhoea...
July 21, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28732398/simulation-of-targeted-pollutant-mitigation-strategies-to-reduce-nitrate-and-sediment-hotspots-in-agricultural-watershed
#15
Awoke Dagnew Teshager, Philip W Gassman, Silvia Secchi, Justin T Schoof
About 50% of U.S. water pollution problems are caused by non-point source (NPS) pollution, primarily sediment and nutrients from agricultural areas, despite the widespread implementation of agricultural Best Management Practices (BMPs). However, the effectiveness of implementation strategies and type of BMPs at watershed scale are still not well understood. In this study, the Soil and Water Assessment Tool (SWAT) ecohydrological model was used to assess the effectiveness of pollutant mitigation strategies in the Raccoon River watershed (RRW) in west-central Iowa, USA...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28732329/an-experimental-study-on-the-influence-of-water-stagnation-and-temperature-change-on-water-quality-in-a-full-scale-domestic-drinking-water-system
#16
Lj Zlatanović, J P van der Hoek, J H G Vreeburg
The drinking water quality changes during the transport through distribution systems. Domestic drinking water systems (DDWSs), which include the plumbing between the water meter and consumer's taps, are the most critical points in which water quality may be affected. In distribution networks, the drinking water temperature and water residence time are regarded as indicators of the drinking water quality. This paper describes an experimental research on the influence of stagnation time and temperature change on drinking water quality in a full-scale DDWS...
July 10, 2017: Water Research
https://www.readbyqxmd.com/read/28731935/predictive-value-of-the-water-drinking-test-and-the-risk-glaucomatous-visual-field-progression
#17
Carlos G De Moraes, Remo Susanna, Lisandro M Sakata, Marcelo Hatanaka
PURPOSE: The purpose of this is to test the hypothesis the intraocular pressure (IOP) peaks during a stress test [the water drinking test (WDT)] can estimate the risk of future visual field progression in treated primary open-angle glaucoma (POAG) patients. PATIENTS AND METHODS: Design: Prospective, longitudinal study. SETTING: Clinical practice. STUDY POPULATION: Treated POAG patients whose IOP was ≤18 mm Hg and who had no IOP-lowering interventions between the date of the WDT and the last eligible visual field...
July 20, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28731891/white-wine-consumption-influences-inflammatory-phase-of-repair-following-myocardial-infarction-in-rats
#18
Nikola Ključević, Ana Marija Milat, Mia Grga, Ivana Mudnić, Mladen Boban, Ivica Grković
Effects of white wine consumption on the expression of inflammatory markers/mediators (MMP-2, MMP-9, NF-ĸB p65 and TGF-β1) in myocardial tissue following experimentally induced permanent myocardial ischemia was investigated. Male Sprague-Dawley rats were given either a combination of white wine and water or water only, for 28 days. After coronary ligation, animals were left to survive for 24 hours. Three representative areas: infarct/ischemic, peri-infarct/border zone and control/non-ischemic zones were analysed for expression of immunoreactivity by measuring threshold area % of signal density...
July 19, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28731553/trends-in-fluid-consumption-and-beverage-choices-among-adults-reveal-preferences-for-ayran-and-black-tea-in-central-turkey
#19
Reyhan Nergiz-Unal, Emine Akal Yildiz, Gülhan Samur, H Tanju Besler, Neslisşah Rakicioğlu
AIM: Beverages are globally significant sources of water in the diet. There is a lack of knowledge about fluid intake from beverage and water consumption in Turkey. Thus, the aim of this study was to examine the type of drinks preferred at meals and snacks as well as the daily fluid, beverage and water intakes based on age and gender. METHODS: A cross-sectional survey was administered to 3411 randomly chosen adult participants (n = 1522 male, n = 1919 female) representing the general profile of central Turkey...
February 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28731315/hypocholesterolemic-activity-of-cornelian-cherry-cornus-mas-l-fruits
#20
Fatemeh Hosseinpour, Tahoora Shomali, Mahmoud Rafieian-Kopaei
Background Lipid profile disturbances are important risk factors for cardiovascular events in patients with diabetes mellitus and finding safe and multifaceted agents is persuaded in this regard. This study aimed to evaluate the effect of cornelian cherry dried powder (CCDP) on serum lipid profile as well as liver antioxidant capacity, HMG-CoA reductase level and activity, and LDL receptor level in streptozotocin-induced diabetic rats. Methods Forty-eight male adult Wistar rats were randomly allocated into eight equal groups and were treated for 4 weeks as follows: negative control (normal rats, basic diet); positive control (diabetic rats, basic diet), T1 to T4 groups: diabetic rats fed with basic diet containing 0...
June 1, 2017: Journal of Complementary & Integrative Medicine
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