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effect of chlorine on health

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https://www.readbyqxmd.com/read/29396219/effects-of-water-quality-sanitation-handwashing-and-nutritional-interventions-on-diarrhoea-and-child-growth-in-rural-kenya-a-cluster-randomised-controlled-trial
#1
Clair Null, Christine P Stewart, Amy J Pickering, Holly N Dentz, Benjamin F Arnold, Charles D Arnold, Jade Benjamin-Chung, Thomas Clasen, Kathryn G Dewey, Lia C H Fernald, Alan E Hubbard, Patricia Kariger, Audrie Lin, Stephen P Luby, Andrew Mertens, Sammy M Njenga, Geoffrey Nyambane, Pavani K Ram, John M Colford
BACKGROUND: Poor nutrition and exposure to faecal contamination are associated with diarrhoea and growth faltering, both of which have long-term consequences for child health. We aimed to assess whether water, sanitation, handwashing, and nutrition interventions reduced diarrhoea or growth faltering. METHODS: The WASH Benefits cluster-randomised trial enrolled pregnant women from villages in rural Kenya and evaluated outcomes at 1 year and 2 years of follow-up. Geographically-adjacent clusters were block-randomised to active control (household visits to measure mid-upper-arm circumference), passive control (data collection only), or compound-level interventions including household visits to promote target behaviours: drinking chlorinated water (water); safe sanitation consisting of disposing faeces in an improved latrine (sanitation); handwashing with soap (handwashing); combined water, sanitation, and handwashing; counselling on appropriate maternal, infant, and young child feeding plus small-quantity lipid-based nutrient supplements from 6-24 months (nutrition); and combined water, sanitation, handwashing, and nutrition...
January 29, 2018: Lancet Global Health
https://www.readbyqxmd.com/read/29389105/chlorinated-polyfluorinated-ether-sulfonates-exhibit-higher-activity-towards-peroxisome-proliferator-activated-receptors-signaling-pathways-than-perfluorooctane-sulfonate
#2
Chuan-Hai Li, Xiao-Min Ren, Ting Ruan, Lin-Ying Cao, Yan Xin, Liang-Hong Guo, Guibin Jiang
Chlorinated polyfluorinated ether sulfonates (Cl-PFAESs) are the alternative products of perfluorooctane sulfonate (PFOS) in the metal plating industry in China. The similarity in chemical structures between Cl-PFAESs and PFOS makes it reasonable to assume they possess similar biological activities. In the present study, we investigated whether Cl-PFAESs could induce cellular effects through peroxisome proliferator-activated receptors (PPARs) signaling pathways like PFOS. By using fluorescence competitive binding assay, we found two dominant Cl-PFAESs (6:2 Cl-PFAES and 8:2 Cl-PFAES) bound to PPARs with affinity higher than PFOS...
February 1, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29369621/robust-chemiresistive-sensor-for-continuous-monitoring-of-free-chlorine-using-graphene-like-carbon
#3
Aditya Aryasomayajula, Caroline Wojnas, Ranjith Divigalpitiya, Ponnambalam Ravi Selvaganapathy, Peter Kruse
Free chlorine is widely used in industry as a bleaching and oxidizing agent. Its concentration is tightly monitored to avoid environmental contamination and deleterious human health effects. Here, we demonstrate a solid state chemiresistive sensor using graphene like carbon (GLC) to detect free chlorine in water. A 15-20 nm thick GLC layer on a PET substrate was modified with a redox-active aniline oligomer (phenyl-capped aniline tetramer, PCAT) to increase sensitivity, improve selectivity and impart fouling resistance...
January 25, 2018: ACS Sensors
https://www.readbyqxmd.com/read/29283253/drinking-water-disinfection-byproducts-dbps-and-human-health-effects-multidisciplinary-challenges-and-opportunities
#4
Xing-Fang Li, William A Mitch
While drinking water disinfection has effectively prevented waterborne diseases, an unintended consequence is the generation of disinfection byproducts (DBPs). Epidemiological studies have consistently observed an association between consumption of chlorinated drinking water with an increased risk of bladder cancer. Out of the >600 DBPs identified, regulations focus on a few classes, such as trihalomethanes (THMs), whose concentrations were hypothesized to correlate with the DBPs driving the toxicity of disinfected waters...
January 21, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29278810/asthma-prevalence-and-school-related-hazardous-air-pollutants-in-the-us-m%C3%A3-xico-border-area
#5
Genny Carrillo, Maria J Perez Patron, Natalie Johnson, Yan Zhong, Rose Lucio, Xiaohui Xu
BACKGROUND: Asthma is the most common chronic disease in children and has been linked to high levels of ambient air pollution and certain hazardous air pollutants (HAPs). Outdoor pollutants such as benzene, released by car emissions, and organic chemicals found in diesel exhaust, as well as particles and irritant gases, including nitrogen dioxide (NO2), sulfur dioxide (SO2), and ozone (O3), contribute to an increased prevalence of respiratory diseases such as asthma. OBJECTIVES: The objectives of this study were to: 1) conduct a screening survey to identify high risk for asthma among school-age children in Hidalgo County, and, 2) study the potential health impact of school-related exposure to HAPs pertaining to asthma risk...
December 23, 2017: Environmental Research
https://www.readbyqxmd.com/read/29276967/synergistic-effect-of-pyrazoles-derivatives-and-doxorubicin-in-claudin-low-breast-cancer-subtype
#6
Silvia Saueressig, Josiane Tessmann, Rosiane Mastelari, Liziane Pereira da Silva, Julieti Buss, Natalia Vieira Segatto, Karine Rech Begnini, Bruna Pacheco, Cláudio Martin Pereira de Pereira, Tiago Collares, Fabiana Kömmling Seixas
BACKGROUND: Breast cancer is a global public health problem. For some subtypes, such as Claudin-low, the prognosis is poorer and the treatment is still a challenge. Pyrazoles are an important class of heterocyclic compounds and are promising anticancer agents based on their chemical properties. The present study was aimed not only at testing pyrazoles previously prepared by our research group in two breast cancer cell lines characterized by intermediated response to conventional chemotherapy but also at analyzing the possible synergistic effect of these pyrazoles associated with doxorubicin...
December 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29223814/a-metabolomics-strategy-to-assess-the-combined-toxicity-of-polycyclic-aromatic-hydrocarbons-pahs-and-short-chain-chlorinated-paraffins-sccps
#7
Feidi Wang, Haijun Zhang, Ningbo Geng, Xiaoqian Ren, Baoqin Zhang, Yufeng Gong, Jiping Chen
The combined toxicity of mixed chemicals is usually evaluated according to several specific endpoints, and other potentially toxic effects are disregarded. In this study, we provided a metabolomics strategy to achieve a comprehensive understanding of toxicological interactions between mixed chemicals on metabolism. The metabolic changes were quantified by a pseudotargeted analysis, and the types of combined effects were quantitatively discriminated according to the calculation of metabolic effect level index (MELI)...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29195980/comparative-stability-and-efficacy-of-selected-chlorine-based-biocides-against-escherichia-coli-in-planktonic-and-biofilm-states
#8
Ana Meireles, Carla Ferreira, Luís Melo, Manuel Simões
Microbial contamination is an unavoidable problem in industrial processes. Sodium hypochlorite (SH) is the most common biocide used for industrial disinfection. However, in view of the current societal concerns on environmental and public health aspects, there is a trend to reduce the use of this biocide as it can lead to the formation of organochlorinated carcinogenic compounds. In this work the efficacy of SH was assessed against Escherichia coli in planktonic and biofilm states and compared with three alternative chlorine-based biocides: neutral electrolyzed oxidizing water (NEOW), chlorine dioxide (CD) and sodium dichloroisocyanurate (NaDCC)...
December 2017: Food Research International
https://www.readbyqxmd.com/read/29143341/a-toxicogenomics-approach-to-screen-chlorinated-flame-retardants-tris-2-chloroethyl-phosphate-and-tris-2-chloroisopropyl-phosphate-for-potential-health-effects
#9
Boris V Krivoshiev, Gerrit T S Beemster, Katrien Sprangers, Ronny Blust, Steven J Husson
Tris(2-chloroethyl) phosphate (TCEP) is a pervasive flame retardant that has been identified as a chemical of concern given its health effects and therefore its use has since been tightly regulated. Tris(2-chloroisopropyl) phosphate (TCIPP), an analogue of TCEP, is believed to be its replacement. However, compared to TCEP, little is known of the toxicological impacts of TCIPP. We used RNA sequencing as unbiased and sensitive tool to identify and compare effects on a transcriptome level of TCEP and TCIPP in the human hepatocellular carcinoma cell line, HepG2...
November 16, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29135009/bacterial-species-identifiable-magnetic-nanosystems-for-early-sepsis-diagnosis-and-extracorporeal-photodynamic-blood-disinfection
#10
Jianhao Wang, Hao Wu, Yanmei Yang, Rong Yan, Yuan Zhao, Yanhao Wang, Aihong Chen, Shilong Shao, Pengju Jiang, Yong-Qiang Li
Despite the numerous bacteria detection and elimination techniques available nowadays, sensitive diagnosis and treatment of sepsis (caused by the presence of bacteria in the bloodstream), especially at the early stage, remain big challenges. Here we report a nanosystem for early sepsis diagnosis and complete extracorporeal blood disinfection, based on iron oxide magnetic nanoparticles functionalized with chlorin e6 molecules and bacterial species-identifiable aptamers (Fe3O4-Ce6-Apt). We demonstrate that the Fe3O4-Ce6-Apt nanosystem can achieve simultaneous blood bacterial species identification and enrichment in a single step, and the enriched bacteria can be easily detected with the assistance of fluorescence microscopic determination...
November 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/29111247/effects-of-a-behavior-change-campaign-on-household-drinking-water-disinfection-in-the-lake-chad-basin-using-the-ranas-approach
#11
Jonathan Lilje, Hans-Joachim Mosler
Worldwide, an estimated 700 million people rely on unimproved drinking water sources; even more consume water that is not safe to drink. Inadequate drinking water quality constitutes a major risk factor for cholera and other diarrheal diseases around the globe, especially for young children in developing countries. Household water treatment and safe storage systems represent an intermediate solution for settings that lack infrastructure supplying safe drinking water. However, the correct and consistent usage of such treatment technologies rely almost exclusively on the consumer's behavior...
October 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29027793/pivotal-roles-of-metal-oxides-in-the-formation-of-environmentally-persistent-free-radicals
#12
Lili Yang, Guorui Liu, Minghui Zheng, Rong Jin, Yuyang Zhao, Xiaolin Wu, Yang Xu
Environmentally persistent free radicals (EPFRs) are emerging pollutants that can adversely affect human health. Although the pivotal roles of metal oxides in EPFR formation have been identified, few studies have investigated the influence of the metal oxide species, size, or concentration on the formation of EPFRs. In this study, EPFR formation from a polyaromatic hydrocarbon with chlorine and hydroxyl substituents (2,4-dichloro-1-naphthol) was investigated using electron paramagnetic resonance spectroscopy...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29022193/development-of-a-modular-vapor-intrusion-model-with-variably-saturated-and-non-isothermal-vadose-zone
#13
Dawit N Bekele, Ravi Naidu, Sreenivasulu Chadalavada
Human health risk assessment at hydrocarbon-contaminated sites requires a critical evaluation of the exposure pathways of volatile organic compounds including assessments of vapor exposure in indoor air. Although there are a number of vapor intrusion models (VIM) currently available, they rarely reproduce actual properties of soils in the vadose zone. At best, users of such models assume averaged parameters for the vadose zone based on information generated elsewhere. The objective of this study was to develop a one-dimensional steady-state VIM, indoorCARE™ model, that considers vertical spatial variations of the degree of saturation (or effective air-filled porosity) and temperature of the vadose zone...
October 12, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29017568/polychlorinated-biphenyls-and-depression-cross-sectional-and-longitudinal-investigation-of-a-dopamine-related-neurochemical-path-in-the-german-helpcb-surveillance-program
#14
Petra Maria Gaum, Monika Gube, Thomas Schettgen, Franziska Maria Putschögl, Thomas Kraus, Bruno Fimm, Jessica Lang
BACKGROUND: Exposure to polychlorinated biphenyls (PCBs) is associated with depressive symptomatology. A cause of depressive symptoms is a disturbance in the neurotransmitter system of dopamine (DA). Animal as well as human studies report that PCBs can influence the DA system. This study examined whether PCB-related depressive symptoms are affected by DA metabolites in humans with high PCB body burden. METHODS: This study is part of the German HELPcB surveillance program (Health Effects in high Level exposure to PCB) for occupationally exposed workers and their relatives...
October 10, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28947237/neuropsychological-effects-of-occupational-exposure-to-polychlorinated-biphenyls
#15
B Fimm, W Sturm, A Esser, T Schettgen, K Willmes, J Lang, P M Gaum, T Kraus
In the context of a health surveillance program for former PCB-exposed workers of a transformer and capacitor recycling company in Germany, their family members, employees of surrounding companies and area residents a broad range of cognitive functions covering attention, executive processing, reasoning, memory and motor performance was examined. The study aimed at identifying potential adverse effects of PCB load on cognitive functions. Detailed analysis of PCB burden of the participants revealed rather high correlations of lower and higher chlorinated as well as dioxin-like PCBs...
December 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28927721/agonistic-effects-of-diverse-xenobiotics-on-the-constitutive-androstane-receptor-as-detected-in-a-recombinant-yeast-cell-assay
#16
Ryo Kamata, Daisuke Nakajima, Fujio Shiraishi
The constitutive androstane receptor (CAR) is a nuclear receptor and transcription factor regulating proteins involved in xenobiotic metabolism. Agonist activation of the CAR can trigger metabolic activation and toxification as well as detoxification and clearance; accordingly, xenobiotic substances acting as CAR ligands may pose a threat to human and animal health. We used yeast cells transduced with the human CAR and the response pathway to measure the CAR-agonistic activities of 549 synthetic or natural compounds: 216 of the tested compounds exhibited CAR-agonistic effects...
September 18, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28846900/antibiotic-resistome-promotion-in-drinking-water-during-biological-activated-carbon-treatment-is-it-influenced-by-quorum-sensing
#17
Ji Zheng, Tao Chen, Hong Chen
The contamination of antibiotic resistance genes (ARGs) in drinking water may pose a direct threat to human health. This study applied high-throughput qPCR and sequencing to investigate the dynamics of ARGs and bacterial communities during the advanced treatment of drinking water using biological activated carbon. The promotion of ARGs was observed, and the normalized copy number of ARGs increased significantly after BAC treatment, raising the number of detected ARGs from 84 to 159. Twenty-nine ARGs were identified as biofilm-influencing sources in the BAC, and they persisted after chlorination...
January 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28790782/revelations-of-an-overt-water-contamination
#18
Gurpreet Singh, S K Kaushik, S Mukherji
BACKGROUND: Contaminated water sources are major cause of water borne diseases of public health importance. Usually, contamination is suspected after an increase in patient load. METHODS: Two health teams investigated the episode. First team conducted sanitary survey, and second team undertook water safety and morbidity survey. On-site testing was carried out from source till consumer end. Investigation was also undertaken to identify factors which masked the situation...
July 2017: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28774621/zebrafish-embryo-toxicity-of-15-chlorinated-brominated-and-iodinated-disinfection-by-products
#19
David Hanigan, Lisa Truong, Michael Simonich, Robert Tanguay, Paul Westerhoff
Disinfection to protect human health occurs at drinking water and wastewater facilities through application of non-selective oxidants including chlorine. Oxidants also transform organic material and form disinfection by-products (DBPs), many of which are halogenated and cyto- and genotoxic. Only a handful of assays have been used to compare DBP toxicity, and researchers are unsure which DBP(s) drive the increased cancer risk associated with drinking chlorinated water. The most extensive data set employs an in vitro model cell, Chinese hamster ovary cells...
August 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28774616/gene-expression-changes-in-blood-rna-after-swimming-in-a-chlorinated-pool
#20
Lucas A Salas, Laia Font-Ribera, Mariona Bustamante, Lauro Sumoy, Joan O Grimalt, Sarah Bonnin, Maria Aguilar, Heidi Mattlin, Manuela Hummel, Anna Ferrer, Manolis Kogevinas, Cristina M Villanueva
Exposure to disinfection by-products (DBP) such as trihalomethanes (THM) in swimming pools has been linked to adverse health effects in humans, but their biological mechanisms are unclear. We evaluated short-term changes in blood gene expression of adult recreational swimmers after swimming in a chlorinated pool. Volunteers swam 40min in an indoor chlorinated pool. Blood samples were drawn and four THM (chloroform, bromodichloromethane, dibromochloromethane and bromoform) were measured in exhaled breath before and after swimming...
August 2017: Journal of Environmental Sciences (China)
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