keyword
MENU ▼
Read by QxMD icon Read
search

Disinfection by-product

keyword
https://www.readbyqxmd.com/read/28731097/dba-induced-caspase-3-dependent-apoptosis-occurs-through-mitochondrial-translocation-of-cyt-c-in-the-rat-hippocampus
#1
Wenbo Jiang, Yingying Chen, Bai Li, Shuying Gao
Dibromoacetic acid (DBA), a by-product of disinfection, develops in drinking water during chlorination or ozonation processes. Water intake is the main source of DBA exposure in humans, which is potentially neurotoxic. The present study investigated the neurotoxic effects of DBA by assessing the behavioral and biochemical characteristics of Sprague Dawley rats intragastrically treated with DBA at concentrations of 20, 50 and 125 mg kg(-1) body weight for 28 consecutive days. The results indicated that animal weight gain and food consumption were not significantly affected by DBA...
July 21, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28724100/ammonia-and-nitrous-oxide-emissions-from-broiler-houses-with-downtime-windrowed-litter
#2
Kyoung S Ro, Philip A Moore, Ariel A Szogi, Patricia D Millner
An emerging poultry manure management practice is in-house windrowing to disinfect the litter. However, this practice is likely to increase emissions of ammonia (NH) and nitrous oxide (NO) from the windrowed litter. The objective of this study was to quantitatively compare NH and NO emissions from broiler houses with and without in-house windrowing. Two broiler houses at a commercial farm were used to compare the NH and NO emissions. Gas emission measurements were conducted continuously and simultaneously for both the control house (without windrowing) and the house with windrowing during the same production periods...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28722575/household-and-individual-risk-factors-for-cholera-among-cholera-vaccine-recipients-in-rural-haiti
#3
Wilfredo R Matias, Jessica E Teng, Isabelle J Hilaire, Jason B Harris, Molly F Franke, Louise C Ivers
Oral cholera vaccination was used as part of cholera control in Haiti, but the vaccine does not provide complete protection. We conducted secondary data analyses of a vaccine effectiveness study in Haiti to evaluate risk factors for cholera among cholera vaccine recipients. Individuals vaccinated against cholera that presented with acute watery diarrhea and had a stool sample positive for Vibrio cholerae O1 were included as cases. Up to four vaccinated individuals who did not present for treatment of diarrhea were included as controls for each case, and matched by location of residence, enrollment time, and age...
May 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28712894/antimicrobial-and-immunomodulatory-activity-of-host-defense-peptides-clavanins-and-ll-37-in-vitro-an-endodontic-perspective
#4
Stella Maris F Lima, Mirna S Freire, Ana Luisa O Gomes, Ana Paula C Cantuária, Flávia Rodrigues P Dutra, Beatriz S Magalhães, Maurício Gonçalves C Sousa, Ludovico Migliolo, Jeeser A Almeida, Octávio L Franco, Taia Maria B Rezende
Endodontic treatment is mainly based on root canal disinfection and its failure may be motivated by microbial resistance. Endodontic therapy can be benefitted by host defense peptides (HDPs), which are multifunctional molecules that act against persistent infection and inflammation. This study aimed to evaluate the antimicrobial, cytotoxic and immunomodulatory activity of several HDPs, namely clavanin A, clavanin A modified (MO) and LL-37, compared to intracanal medication Ca(OH)2. HDPs and Ca(OH)2 were evaluated by: (1) antimicrobial assays against Candida albicans and Enterococcus faecalis, (2) cytotoxicity assays and (3) cytokine tumor necrosis factor (TNF)-α, monocyte chemoattractant protein (MCP)-1, interleukin (IL)-1α, IL-6, IL-10 and IL-12 and nitric oxide (NO) production by RAW 264...
July 14, 2017: Peptides
https://www.readbyqxmd.com/read/28697425/are-the-tio2-nps-a-trojan-horse-for-personal-care-products-pcps-in-the-clam-ruditapes-philippinarum
#5
M Sendra, M G Pintado-Herrera, G V Aguirre-Martínez, I Moreno-Garrido, L M Martin-Díaz, P A Lara-Martín, Blasco J
In recent years, increasing quantities of personal care products (PCPs) are being released into the environment. However, data about bioaccumulation and toxicity are scarce; and extraction and analytical approaches are not well developed. In this work, the marine clam Ruditapes philippinarum, selected as model organism, has been employed to investigate bioaccumulation, antioxidant enzyme activities and DNA damage due to exposure to TiO2 nanoparticles and bulk TiO2 (inorganic compounds that are frequent components of PCPs, plastics, paints and coatings, foods and disinfectant water treatments)...
July 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28687643/cancer-incidence-attributable-to-lifestyle-and-environmental-factors-in-alberta-in-2012-summary-of-results
#6
Anne Grundy, Abbey E Poirier, Farah Khandwala, Xin Grevers, Christine M Friedenreich, Darren R Brenner
BACKGROUND: Estimates of the proportion of cancer cases that can be attributed to modifiable risk factors are not available for Canada and, more specifically, Alberta. The purpose of this study was to estimate the total proportion of cancer cases in Alberta in 2012 that could be attributed to a set of 24 modifiable lifestyle and environmental risk factors. METHODS: We estimated summary population attributable risk estimates for 24 risk factors (smoking [both passive and active], overweight and obesity, inadequate physical activity, diet [inadequate fruit and vegetable consumption, inadequate fibre intake, excess red and processed meat consumption, salt consumption, inadequate calcium and vitamin D intake], alcohol, hormones [oral contraceptives and hormone therapy], infections [Epstein-Barr virus, hepatitis B and C viruses, human papillomavirus, Helicobacter pylori], air pollution, natural and artificial ultraviolet radiation, radon and water disinfection by-products) by combining population attributable risk estimates for each of the 24 factors that had been previously estimated...
July 7, 2017: CMAJ Open
https://www.readbyqxmd.com/read/28683429/the-impact-of-adding-organic-carbon-on-the-concentrations-of-total-residual-oxidants-and-disinfection-by-products-in-approval-tests-for-ballast-water-management-systems
#7
Jihyun Lee, Myung-Baek Shon, Hyung-Gon Cha, Keun-Hyung Choi
In the G8 and G9 approval tests for ballast water management systems, organic carbon additives are frequently supplemented into test water to satisfy the water quality requirements. Because organic additives can affect the approval test, the additive selected, and its use and validation should be included in the test report. This study assessed the effects of organic carbon additives on the concentration of total residual oxidants (TROs) and the formation of disinfection by-products (DBPs). The concentration of dissolved organic carbon (DOC) in test water containing additives varied depending on the type of additive, but all additives, except for methylcellulose, had concentrations similar to or higher than the theoretical values...
July 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28683148/demonstration-of-disinfection-procedure-for-the-development-of-accurate-blood-glucose-meters-in-accordance-with-iso-15197-2013
#8
Shu-Ping Lin, Wen-Ye Lin, Jung-Tzu Chang, Chun-Feng Chu
Despite measures to reduce disease transmission, a risk can occur when blood glucose meters (BGMs) are used on multiple individuals or by caregivers assisting a patient. The laboratory and in-clinic performance of a BGM system before and after disinfection should be demonstrated to guarantee accurate readings and reliable control of blood glucose (BG) for patients. In this study, an effective disinfection procedure, conducting wiping 10 times to assure a one minute contact time of the disinfectant on contaminated surface, was first demonstrated using test samples of the meter housing materials, including acrylonitrile butadiene styrene (ABS), polymethyl methacrylate (PMMA), and polycarbonate (PC), in accordance with ISO 15197:2013...
2017: PloS One
https://www.readbyqxmd.com/read/28671197/protective-effects-of-fraction-4a-of-polysaccharides-isolated-from-lycium-barbarum-against-kbro3-induced-renal-damage-in-rats
#9
J Li, M Shi, B Ma, Y Zheng, R Niu, K Li
Potassium bromate (KBrO3) is widely used as a food additive and is a major by-product of water disinfection. The aim of this study was to investigate the protective effects of fraction 4a of polysaccharides isolated from Lycium barbarum (LBP-4a) against renal damage induced by KBrO3 in rats and to determine the relevant mechanisms behind these effects. Male Wistar rats were divided into a normal control group, a KBrO3 control group, and LBP-4a(L) and LBP-4a(H) groups. With the exception of the normal control group, the rats in the other three groups were administered KBrO3 by intraperitoneal injection to induce renal damage...
July 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28667108/cleaning-and-disinfection-of-biofilms-composed-of-listeria-monocytogenes-and-background-microbiota-from-meat-processing-surfaces
#10
Annette Fagerlund, Trond Møretrø, Even Heir, Romain Briandet, Solveig Langsrud
Surfaces of food processing premises are exposed to regular cleaning and disinfection (C&D) regimes, using biocides that are highly effective against bacteria growing as planktonic cells. However, bacteria growing in surface associated communities (biofilms) are typically more tolerant towards C&D than their individual free cells counterparts, and survival of pathogens such as Listeria monocytogenes may be affected by interspecies interactions within biofilms. In this study, Pseudomonas and Acinetobacter were the most frequently isolated genera surviving on conveyor belts subjected to C&D in meat processing plants...
June 30, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28662450/dynamics-and-ecological-risk-assessment-of-chromophoric-dissolved-organic-matter-in-the-yinma-river-watershed-rivers-reservoirs-and-urban-waters
#11
Sijia Li, Jiquan Zhang, Enliang Guo, Feng Zhang, Qiyun Ma, Guangyi Mu
The extensive use of a geographic information system (GIS) and remote sensing in ecological risk assessment from a spatiotemporal perspective complements ecological environment management. Chromophoric dissolved organic matter (CDOM), which is a complex mixture of organic matter that can be estimated via remote sensing, carries and produces carcinogenic disinfection by-products and organic pollutants in various aquatic environments. This paper reports the first ecological risk assessment, which was conducted in 2016, of CDOM in the Yinma River watershed including riverine waters, reservoir waters, and urban waters...
June 26, 2017: Environmental Research
https://www.readbyqxmd.com/read/28662397/oxidation-of-%C3%AE-lactam-antibiotics-by-peracetic-acid-reaction-kinetics-product-and-pathway-evaluation
#12
Kejia Zhang, Xinyan Zhou, Penghui Du, Tuqiao Zhang, Meiquan Cai, Peizhe Sun, Ching-Hua Huang
Peracetic acid (PAA) is a disinfection oxidant used in many industries including wastewater treatment. β-Lactams, a group of widely prescribed antibiotics, are frequently detected in wastewater effluents and surface waters. The reaction kinetics and transformation of seven β-lactams (cefalexin (CFX), cefadroxil (CFR), cefapirin (CFP), cephalothin (CFT), ampicillin (AMP), amoxicillin (AMX) and penicillin G (PG)) toward PAA were investigated to elucidate the behavior of β-lactams during PAA oxidation processes...
June 22, 2017: Water Research
https://www.readbyqxmd.com/read/28651208/relationship-between-thms-ndma-formation-potential-and-molecular-weight-of-organic-compounds-for-source-and-treated-water-in-shanghai-china
#13
Dong An, Bin Gu, Sainan Sun, Han Zhang, Yanan Chen, Huifeng Zhu, Jian Shi, Jun Tong
Molecular weight (MW) distributions in source and treated water in Shanghai, China were investigated to understand the relationship between trihalomethanes formation potential/N-nitrosodimethylamine formation potential (THMFP/NDMAFP) and dissolved organic carbon (DOC) for different MW ranges (<1K, 1-10K, 10-30K, >30KDa). The result of MW distributions in source water indicated a relationship between THMFP/NDMAFP and DOC such that DOC for <1K and 1-30KDa DOC were linearly related to THMFP and NDMAFP, respectively...
June 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28650152/accelerated-reduction-of-bromate-in-frozen-solution
#14
Dae Wi Min, Wonyong Choi
Bromate is a common disinfection by-product formed during ozonation. Reducing bromate into bromide can remove this toxic pollutant, however, not many studies have been done for its environmental fate. In this work, we demonstrate a new transformation pathway that bromate can be efficiently reduced to bromide in frozen solution in the presence of organic reductants like humic substances (HS). The results showed that bromate in frozen solution could be removed by 30~40% in dark condition and 80~90% in irradiation condition (λ > 300 nm) in 24 h, while around 1% bromate was reduced in aqueous solution...
June 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28647237/developing-a-chloramine-decay-index-to-understand-nitrification-a-case-study-of-two-chloraminated-drinking-water-distribution-systems
#15
Sina Moradi, Sanly Liu, Christopher W K Chow, John van Leeuwen, David Cook, Mary Drikas, Rose Amal
The management of chloramine decay and the prevention of nitrification are some of the critical issues faced by water utilities that use chloramine as a disinfectant. In this study, potential association between high performance size exclusion chromatography (HPSEC) data obtained with multiple wavelength Ultraviolet (UV) detection from two drinking water distribution systems in Australia and nitrification occurrence was investigated. An increase in the absorbance signal of HPSEC profiles with UV detection at λ=230nm between apparent molecular weights of 200 to 1000Da was observed at sampling sites that experienced rapid chloramine decay and nitrification while its absorbance signal at λ=254nm decreased...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28644912/biofilm-formation-and-disinfectant-resistance-of-salmonella-spp-in-mono-and-dual-species-with-pseudomonas-aeruginosa
#16
Xinyi Pang, Yishan Yang, Hyun-Gyun Yuk
AIMS: This study aimed to evaluate the biofilm formation and disinfectant resistance of Salmonella cells in mono- and dual-species biofilms with Pseudomonas aeruginosa, and to investigate the role of extracellular polymeric substances (EPS) in protection of biofilms against disinfection treatment. METHODS AND RESULTS: The populations of Salmonella in mono- or dual-species biofilms with P. aeruginosa on stainless steel (SS) coupons were determined before and after exposure to commercial disinfectant, 50 μg ml(-1) chlorine or 200 μg ml(-1) Ecolab(®) Whisper(™) V (a blend of four effective quaternary ammonium compounds)...
June 23, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28643606/origin-of-low-molecular-mass-aldehydes-as-disinfection-by-products-in-beverages
#17
María Serrano, Mercedes Gallego, Manuel Silva
A novel, simple and automatic method based on static headspace-gas chromatography-mass spectrometry has been developed to determine 10 low-molecular mass aldehydes that can be found in beverages, coming from the treated water used in their production. These aldehydes are the most frequently found in treated water as water disinfection by-products, so they can be used as indicators of the addition of treated water to beverages. The study covered a large number of fruit juices and soft drinks. The presence of the whole array of analytes is related to the contact with treated water during beverage production, mainly by the addition of treated water as ingredient...
July 10, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28643277/the-role-of-solubility-on-the-rejection-of-trace-organics-by-nanofiltration-membrane-exemplified-with-disinfection-by-products
#18
Fan-Xin Kong, Xiao-Mao Wang, Hong-Wei Yang, Jin-Fu Chen, Chun-Mei Guo, Tong Zhang, Yuefeng F Xie
Interactions of trace organic compounds (TOrCs) with polymeric nanofiltration (NF) membrane can affect their rejection. It is desirable to investigate whether solubility which depends on the free energy of interaction between these solutes and water correlates with rejection/adsorption and the potential to be incorporated in the partitioning terms of current NF model. A total of ten neutral disinfection by-products (DBPs) were selected as the model compounds for TOrCs to comprehensively investigate the role of solubility on rejection and adsorption...
June 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28642746/virucidal-activity-of-fogged-chlorine-dioxide-and-hydrogen-peroxide-based-disinfectants-against-human-norovirus-and-its-surrogate-feline-calicivirus-on-hard-to-reach-surfaces
#19
Naim Montazeri, Clyde Manuel, Eric Moorman, Janak R Khatiwada, Leonard L Williams, Lee-Ann Jaykus
Human norovirus (NoV) is the leading cause of foodborne illnesses in the United States. Norovirus is shed in high numbers in the feces and vomitous of infected individuals. Contact surfaces contaminated with bodily fluids harboring infectious virus particles serve as vehicles for pathogen transmission. Environmental stability of NoV and its resistance to many conventional disinfectants necessitate effective inactivation strategies to control the spread of virus. We investigated the efficacy of two commercial disinfectants, hydrogen peroxide (7...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28640797/rural-and-urban-differences-in-air-quality-2008-2012-and-community-drinking-water-quality-2010-2015-united-states
#20
Heather Strosnider, Caitlin Kennedy, Michele Monti, Fuyuen Yip
PROBLEM/CONDITION: The places in which persons live, work, and play can contribute to the development of adverse health outcomes. Understanding the differences in risk factors in various environments can help to explain differences in the occurrence of these outcomes and can be used to develop public health programs, interventions, and policies. Efforts to characterize urban and rural differences have largely focused on social and demographic characteristics. A paucity of national standardized environmental data has hindered efforts to characterize differences in the physical aspects of urban and rural areas, such as air and water quality...
June 23, 2017: MMWR. Surveillance Summaries: Morbidity and Mortality Weekly Report. Surveillance Summaries
keyword
keyword
14549
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"