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https://www.readbyqxmd.com/read/28810509/spatiotemporal-assessment-and-trade-offs-of-multiple-ecosystem-services-based-on-land-use-changes-in-zengcheng-china
#1
Xiao Sun, Feng Li
Driven by rapid urbanization, land use change has become a significant factor influencing ecosystem services (ESs). To support the decision-making process of city planners and policy makers, assessing the spatiotemporal changes associated with multiple ESs is vital. In this study, we developed a general structure to assess the changes of multiple ESs in Zengcheng, China. A new index also was developed to measure the comprehensive ecosystem service (CES). Trade-offs of various ESs were analyzed by using correlation analysis...
August 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28809869/-some-considerations-on-revision-of-legislation-hygiene-sanitary-for-the-management-of-swimming-pools-for-swimming-pool-use-and-the-national-consultation-of-the-ministry-of-health
#2
Federica Valeriani, Rossella Briancesco, Sara Sanzari, Gianluca Gianfranceschi, Emanuele Ferretti, Lucia Bonadonna, Vincenzo Romano Spica
After over a decade the Italian regulation on hygiene and surveillance in swimming pools is under revision based on WHO guidelines and current laws from other European countries. The Ministry of Health is proposing an update of the Annex 1 that contains physical, chemical and microbiological indicators for monitoring swimming pool hygiene. The authors review current regulations and the new proposal for updating surveillance. A comparison of Annex 1 as approved in 2003 and the new version as proposed in 2016 allowed to enlighten innovative improvements...
May 2017: Igiene e Sanità Pubblica
https://www.readbyqxmd.com/read/28806081/chlorination-kinetics-of-11-nor-9-carboxy-%C3%AE-9-tetrahydrocannabinol-effects-of-ph-and-humic-acid
#3
Allison L Mackie, Yuri Park, Graham A Gagnon
The main psychoactive compound in marijuana, Δ9-tetrahydrocannabinol (THC), and its metabolites are emerging organic contaminants that have been detected in waste and surface waters. As legalization of marijuana for medical and recreational use continues, the effects of increased use and potency of marijuana on water and wastewater treatment processes and the environment should be considered. This study examined degradation kinetics of the main urinary metabolite of THC, 11-nor-9-carboxy-Δ9-tetrahydrocannabinol (THC-COOH) with chlorine...
August 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28761562/assessment-of-physicochemical-and-microbiological-quality-of-public-swimming-pools-in-addis-ababa-ethiopia
#4
Kokebe Yedeme, Melese Hailu Legese, Almaz Gonfa, Somson Girma
BACKGROUND: From swimming pools, bathers may acquire many potential pathogens or may be affected by the physicochemical characteristics of water used during bathing. Hence, this study aimed at assessing the physicochemical and microbiological quality of public swimming pools located at different hotels and recreation center in Addis Ababa, Ethiopia. METHOD: A cross sectional study was carried out from February to May, 2016. Nine hotels and one recreation center which recognized to have public swimming services were included...
2017: Open Microbiology Journal
https://www.readbyqxmd.com/read/28755717/a-method-for-examining-temporal-changes-in-cyanobacterial-harmful-algal-bloom-spatial-extent-using-satellite-remote-sensing
#5
Erin A Urquhart, Blake A Schaeffer, Richard P Stumpf, Keith A Loftin, P Jeremy Werdell
Cyanobacterial harmful algal blooms (CyanoHAB) are thought to be increasing globally over the past few decades, but relatively little quantitative information is available about the spatial extent of blooms. Satellite remote sensing provides a potential technology for identifying cyanoHABs in multiple water bodies and across geo-political boundaries. An assessment method was developed using MEdium Resolution Imaging Spectrometer (MERIS) imagery to quantify cyanoHAB surface area extent, transferable to different spatial areas, in Florida, Ohio, and California for the test period of 2008 to 2012...
July 2017: Harmful Algae
https://www.readbyqxmd.com/read/28750330/modelling-the-transport-and-decay-processes-of-microbial-tracers-in-a-macro-tidal-estuary
#6
Amyrhul Abu-Bakar, Reza Ahmadian, Roger A Falconer
The Loughor Estuary is a macro-tidal coastal basin, located along the Bristol Channel, in the South West of the U.K. The maximum spring tidal range in the estuary is up to 7.5 m, near Burry Port Harbour. This estuarine region can experience severe coastal flooding during high spring tides, including extreme flooding of the intertidal saltmarshes at Llanrhidian, as well as the lower industrial and residential areas at Llanelli and Gowerton. The water quality of this estuarine basin needs to comply with the designated standards for safe recreational bathing and shellfish harvesting industries...
July 3, 2017: Water Research
https://www.readbyqxmd.com/read/28734349/integrated-preservation-and-sample-clean-up-procedures-for-studying-water-ingestion-by-recreational-swimmers-via-urinary-biomarker-determination
#7
Ricardo Cantú, Jody A Shoemaker, Catherine A Kelty, Larry J Wymer, Thomas D Behymer, Alfred P Dufour, Matthew L Magnuson
The use of cyanuric acid as a biomarker for ingestion of swimming pool water may lead to quantitative knowledge of the volume of water ingested during swimming, contributing to a better understanding of disease resulting from ingestion of environmental contaminants. When swimming pool water containing chlorinated cyanurates is inadvertently ingested, cyanuric acid is excreted quantitatively within 24 h as a urinary biomarker of ingestion. Because the volume of water ingested can be quantitatively estimated by calculation from the concentration of cyanuric acid in 24 h urine samples, a procedure for preservation, cleanup, and analysis of cyanuric acid was developed to meet the logistical demands of large scale studies...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28704433/forecasting-distributions-of-an-aquatic-invasive-species-nitellopsis-obtusa-under-future-climate-scenarios
#8
Daniel Romero-Alvarez, Luis E Escobar, Sara Varela, Daniel J Larkin, Nicholas B D Phelps
Starry stonewort (Nitellopsis obtusa) is an alga that has emerged as an aquatic invasive species of concern in the United States. Where established, starry stonewort can interfere with recreational uses of water bodies and potentially have ecological impacts. Incipient invasion of starry stonewort in Minnesota provides an opportunity to predict future expansion in order to target early detection and strategic management. We used ecological niche models to identify suitable areas for starry stonewort in Minnesota based on global occurrence records and present-day and future climate conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28685372/applying-a-water-quality-index-model-to-assess-the-water-quality-of-the-major-rivers-in-the-kathmandu-valley-nepal
#9
Ram Krishna Regmi, Binaya Kumar Mishra, Yoshifumi Masago, Pingping Luo, Asako Toyozumi-Kojima, Shokhrukh-Mirzo Jalilov
Human activities during recent decades have led to increased degradation of the river water environment in South Asia. This degradation has led to concerns for the populations of the major cities of Nepal, including those of the Kathmandu Valley. The deterioration of the rivers in the valley is directly linked to the prevalence of poor sanitary conditions, as well as the presence of industries that discharge their effluents into the river. This study aims to investigate the water quality aspect for the aquatic ecosystems and recreation of the major rivers in the Kathmandu Valley using the Canadian Council of Ministers of the Environment water quality index (CCME WQI)...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28676772/executive-functions-of-divers-are-selectively-impaired-at-20-meter-water-depth
#10
Fabian Steinberg, Michael Doppelmayr
Moving and acting underwater within recreational or occupational activities require intact executive functions, since they subserve higher cognitive functions such as successful self-regulation, coping with novel situations, and decision making; all of which could be influenced by nitrogen narcosis due to elevated partial pressure under water. However, specific executive functions that could provide a differentiated view on humans' cognitive performance ability have not yet been systematically analyzed in full-water immersion, which is a research gap addressed within this approach to contribute to a better understanding of nitrogen narcosis...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28668750/arsenic-contamination-in-irrigation-water-agricultural-soil-and-maize-crop-from-an-abandoned-smelter-site-in-matehuala-mexico
#11
Esther Aurora Ruíz-Huerta, Alonso de la Garza Varela, Juan Miguel Gómez-Bernal, Francisco Castillo, Miguel Avalos-Borja, Bhaskar SenGupta, Nadia Martínez-Villegas
Mobility of Arsenic (As) from metallurgical wastes in Matehuala, Mexico has been accounted for ultra-high concentration of As in water (4.8-158mg/L) that is used for recreational purposes as well as cultivation of maize. In this study, we (i) measured As concentrations in soils irrigated with this water, (ii) investigated the geochemical controls of available As, and (iii) measured bioaccumulation of As in maize. Water, soil, and maize plant samples were collected from 3 different plots to determine As in environmental matrices as well as water soluble As in soils...
June 21, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28653930/identification-and-growth-optimization-of-a-marine-bacillus-dk1-sa11-having-potential-of-producing-broad-spectrum-antimicrobial-compounds
#12
Muhammad Naseem Khan, Hong Lin, Meng Li, Jingxue Wang, Zulfiqar Ali Mirani, Seema Ismat Khan, Muhammad Aslam Buzdar, Imran Ali, Khalid Jamil
Control of harmful bacteria in food, aquaculture, pharmaceuticals, agriculture, hospitals and recreation water pools are of great global concern. Marine bacteria are an enormous source of bio-controlling agents. The aim of this study was to identify and optimize the growth conditions including effect of different biotic and abiotic factors on antimicrobial activity of strain DK1-SA11 isolated from Qingdao Bay of China Yellow Sea. Microscopic characterization, API® 20E and 50 CHB kit base carbohydrates utilization, 16S rDNA and DNA gyrB gene sequencing studies identified the bacterium as Bacillus subtilis subsp...
May 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28646737/pollution-characteristics-and-source-identification-of-trace-metals-in-riparian-soils-of-miyun-reservoir-china
#13
Lanfang Han, Bo Gao, Jin Lu, Yang Zhou, Dongyu Xu, Li Gao, Ke Sun
The South-to-North Water Diversion Project, one of China's largest water diversion projects, has aroused widespread concerns about its potential ecological impacts, especially the potential release of trace metals from shoreline soils into Miyun Reservoir (MYR). Here, riparian soil samples from three elevations and four types of land use were collected. Soil particle size distributions, contents and chemical fractionations of trace metals and lead (Pb) isotopic compositions were analyzed. Results showed that soil texture was basically similar in four types of land use, being mainly composed of sand, with minor portions of clay and silt, while recreational land contained more abundant chromium (Cr), copper (Cu), zinc (Zn) and cadmium (Cd), suggesting a possible anthropogenic source for this soil pollution...
June 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28646114/staphylococcus-aureus-strain-newman-photoinactivation-and-cellular-response-to-sunlight-exposure
#14
Jill S McClary, Lauren M Sassoubre, Alexandria B Boehm
Sunlight influences microbial water quality of surface waters. Previous studies have investigated photoinactivation mechanisms and cellular photostress responses of fecal indicator bacteria (FIB), including Escherichia coli and enterococci, but further work is needed to characterize photostress responses of bacterial pathogens. Here we investigate the photoinactivation of Staphylococcus aureus (strain Newman), a pigmented, waterborne pathogen of emerging concern. We measured photodecay using standard culture-based assays and cellular membrane integrity; and investigated photostress response by measuring the relative number of mRNA transcripts of select oxidative stress, DNA repair, and metabolism genes...
June 23, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28642585/how-postmortem-redistribution-of-mdma-in-acute-alcohol-mdma-combined-use-rats-change-under-effects-of-alcohol
#15
Man Liang, Jing Zhang, Na Zheng, Liang Liu
MDMA is often taken recreationally with alcohol as combined-use. The objective was to determine MDMA postmortem redistribution (PMR) and corresponding effects in combined-style under different storage conditions. Steps were 20%-mixture of alcohol-water for initial 4 weeks to Group-A&B and intragastric infusions of MDMA (150 mg/kg) to Group-A later; in the same time, drinking pure water to Group-C&D first and then MDMA-fed to Group-C. The sacrificed rats were kept under different conditions for 10-d, during which the body fluids and tissues were collected on 15 continuous time-points and then detected...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28615276/bluehealth-a-study-programme-protocol-for-mapping-and-quantifying-the-potential-benefits-to-public-health-and-well-being-from-europe-s-blue-spaces
#16
James Grellier, Mathew P White, Maria Albin, Simon Bell, Lewis R Elliott, Mireia Gascón, Silvio Gualdi, Laura Mancini, Mark J Nieuwenhuijsen, Denis A Sarigiannis, Matilda van den Bosch, Tanja Wolf, Susanne Wuijts, Lora E Fleming
INTRODUCTION: Proximity and access to water have long been central to human culture and accordingly deliver countless societal benefits. Over 200 million people live on Europe's coastline, and aquatic environments are the top recreational destination in the region. In terms of public health, interactions with 'blue space' (eg, coasts, rivers, lakes) are often considered solely in terms of risk (eg, drowning, microbial pollution). Exposure to blue space can, however, promote health and well-being and prevent disease, although underlying mechanisms are poorly understood...
June 14, 2017: BMJ Open
https://www.readbyqxmd.com/read/28600684/applying-spatial-analysis-techniques-to-assess-the-suitability-of-multipurpose-uses-of-spring-water-in-the-jiaosi-hot-spring-region-taiwan
#17
Cheng-Shin Jang, Han-Chen Huang
The Jiaosi Hot Spring Region is one of the most famous tourism destinations in Taiwan. The spring water is processed for various uses, including irrigation, aquaculture, swimming, bathing, foot spas, and recreational tourism. Moreover, the multipurpose uses of spring water can be dictated by the temperature of the water. To evaluate the suitability of spring water for these various uses, this study spatially characterized the spring water temperatures of the Jiaosi Hot Spring Region by integrating ordinary kriging (OK), sequential Gaussian simulation (SGS), and Geographic information system (GIS)...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28599208/occurrence-of-pharmaceutical-recreational-and-psychotropic-drug-residues-in-surface-water-on-the-northern-antarctic-peninsula-region
#18
Silvia González-Alonso, Luis Moreno Merino, Sara Esteban, Miren López de Alda, Damià Barceló, Juan José Durán, Jerónimo López-Martínez, Jaume Aceña, Sandra Pérez, Nicola Mastroianni, Adrián Silva, Myriam Catalá, Yolanda Valcárcel
Human presence in the Antarctic is increasing due to research activities and the rise in tourism. These activities contribute a number of potentially hazardous substances. The aim of this study is to conduct the first characterisation of the pharmaceuticals and recreational drugs present in the northern Antarctic Peninsula region, and to assess the potential environmental risk they pose to the environment. The study consisted of a single sampling of ten water samples from different sources, including streams, ponds, glacier drains, and a wastewater discharge into the sea...
June 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28598349/predicting-water-filter-and-bottled-water-use-in-appalachia-a-community-scale-case-study
#19
Jonas G Levêque, Robert C Burns
A questionnaire survey was conducted in order to assess residents' perceptions of water quality for drinking and recreational purposes in a mid-sized city in northcentral West Virginia. Two logistic regression analyses were conducted in order to investigate the factors that influence bottle use and filter use. Results show that 37% of respondents primarily use bottled water and that 58% use a household filter when drinking from the tap. Respondents with lower levels of environmental concern, education levels, and lower organoleptic perceptions were most likely to perceive health risks from tap water consumption, and were most likely to use bottled water...
June 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/28597613/the-use-of-steroids-by-gym-athletes-an-attempt-to-diagnose-the-problem-scale-and-possible-causes
#20
Katarzyna Gwizdek, Anna Brzęk, Monika Bąk-Sosnowska, Anna Dittfeld, Andrzej Knapik, Damian Ziaja
BACKGROUND: Anabolic-androgenic steroids (AAS) are said to be frequently used by both professional and amateur athletes. In addition to having a negative impact on health, steroids defy the concept of fair play. DESIGN: observational study. SETTING: other - Gyms. AIM: The aim of the study was to evaluate the scale of the problem related to using anabolic- androgenic steroids (AAS) by gym athletes and to analyze possible causes...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
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