keyword
MENU ▼
Read by QxMD icon Read
search

Triclosan

keyword
https://www.readbyqxmd.com/read/28342992/estimating-removals-of-contaminants-of-emerging-concern-from-wastewater-treatment-plants-the-critical-role-of-wastewater-hydrodynamics
#1
Zeina Baalbaki, Tamanna Sultana, Chris Metcalfe, Viviane Yargeau
Accurate data is needed to evaluate the capacity of wastewater treatments plants (WWTPs) to remove contaminants of emerging concern (CECs). The variability of CEC removals reported in the literature has raised questions about the methods used to estimate removals. In this study, we used the recently proposed "fractionated approach" to account for the influence of hydrodynamics in WWTPs and applied this method for estimating the removal of 23 target CECs. Data on the conductivity and temperature of wastewater at two WWTPs were used to determine the hydraulic model that best described the flow regime of treatment units...
March 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28339349/is-triclosan-a-neurotoxic-agent
#2
Joanna A Ruszkiewicz, Shaojun Li, Maliya B Rodriguez, Michael Aschner
Triclosan (TCS) is an antibacterial agent that has been used in many products since 1960s. Given its broad usage as an antiseptic TCS is present ubiquitously in the environment. Trace levels of TCS continue to be detected in many organisms, and it has been shown to be particularly toxic to aquatic species. The mechanisms underlying TCS-mediated toxicity include hormone dyshomeostasis, induction of oxidative stress, apoptosis and inflammation. Although TCS has been considered to be non-toxic to mammals, the adverse effects of continuous, long-term and low concentration exposure remain unknown...
2017: Journal of Toxicology and Environmental Health. Part B, Critical Reviews
https://www.readbyqxmd.com/read/28336031/clinical-issues-april-2017
#3
Amber Wood
Patient involvement in hand hygiene Key words: patient engagement, hand hygiene, hand washing stations, hand hygiene promotion. Alcohol-based surgical hand rubs in the OR Key words: hand hygiene, hand rub, dispenser. Personal hand hygiene dispensers Key words: hand hygiene, hand rub, hand rub dispenser, personal dispenser. Hand soap Key words: soap, hand hygiene, hand wash, plain soap, triclosan. Disposal of water used for plaster application in scrub sinks Key words: plaster, pour, sink, scrub sink. Multiple hand hygiene indications Key words: hand hygiene, hand wash, hand rub...
April 2017: AORN Journal
https://www.readbyqxmd.com/read/28334672/effects-of-4-mbc-and-triclosan-in-embryos-of-the-frog-pelophylax-perezi
#4
Diana Martins, Marta S Monteiro, Amadeu M V M Soares, Carla Quintaneiro
The widespread and increasing use of personal care products (PCPs) have led to environmental contamination by substances included in these products. These substances have been detected in aquatic compartments and shown to cause adverse effects on non-target aquatic organisms. In this work toxicity of the antimicrobial triclosan (TCS) and of the UV-filter 3-(4-methylbenzylidene) camphor (4-MBC) was assessed in the embryos of Perez' frog Pelophylax perezi. Lethal and sub-lethal parameters were evaluated in embryos in Gosner stage 8-9 exposed to 0...
March 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28327805/antifungal-activity-of-synthetic-antiseptics-and-natural-compounds-against-candida-dubliniensis-before-and-after-in-vitro-fluconazole-exposure
#5
Cássia Franco Reginato, Laíssa Arévalo Bandeira, Régis Adriel Zanette, Janio Morais Santurio, Sydney Hartz Alves, Cristiane Cademartori Danesi
INTRODUCTION: This study evaluated the susceptibilities of oral candidiasis-derived Candida albicans, fluconazole-resistant (FR) Candida dubliniensis, and fluconazole-susceptible (FS) C. dubliniensis to synthetic antiseptics [chlorhexidine gluconate (CHX), cetylpyridinium chloride (CPC), and triclosan (TRC)] and natural compounds (carvacrol, eugenol and thymol). METHODS: Susceptibility tests were performed based on the M27-A3 reference method. The fluconazole-resistant C...
January 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28322267/exposure-of-pregnant-mice-to-triclosan-impairs-placental-development-and-nutrient-transport
#6
Xinyuan Cao, Xu Hua, Xiaoli Wang, Ling Chen
Triclosan (TCS) is associated with spontaneous abortions and fetal growth restriction. Here, we showed that when pregnant mice were treated with 8 mg/kg TCS (8-TCS mice) on gestational days (GD) 6-18 fetal body weights were lower than controls. Placental weights and volumes were reduced in 8-TCS mice. The placental proliferative cells and expression of PCNA and Cyclin D3 on GD13 were remarkably decreased in 8-TCS mice. The decreases in activities and expression of placental System A amino acid or glucose transporters on GD14 and GD17 were observed in 8-TCS mice...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28300022/optimization-of-a-modified-quechers-method-for-multiresidue-analysis-of-pharmaceuticals-and-personal-care-products-in-sewage-and-surface-water-by-lc-ms-ms
#7
Akanksha S Kachhawaha, Pranav M Nagarnaik, Manjusha Jadhav, Anjali Pudale Pawan K Labhasetwar, Kaushik Banerjee
A quick, sensitive multiresidue method was developed for the analysis of 19 multiclass pharmaceuticals and personal care products (PPCPs) in surface water and sewage water. The proposed modified QuEChERS method involved the extraction of water samples (10 mL) with acetonitrile (10 mL) after the addition of 1% acetic acid, 4 g magnesium sulfate, and 0.2 g ammonium acetate, and was validated in distilled water, surface water, and sewage water with respect to linearity, LOD and LOQ, precision, and accuracy. The LOD and LOQ varied within the ranges of 0...
March 16, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28293709/metabolic-perturbation-to-enhance-polyketide-and-nonribosomal-peptide-antibiotic-production-using-triclosan-and-ribosome-targeting-drugs
#8
Yukinori Tanaka, Masumi Izawa, Yoshikazu Hiraga, Yuya Misaki, Tomoko Watanabe, Kozo Ochi
Although transcriptional activation of pathwayspecific positive regulatory genes and/or biosynthetic genes is primarily important for enhancing secondary metabolite production, reinforcement of substrate supply, as represented by primary metabolites, is also effective. For example, partial inhibition of fatty acid synthesis with ARC2 (an analog of triclosan) was found to enhance polyketide antibiotic production. Here, we demonstrate that this approach is effective even for industrial high-producing strains, for example enhancing salinomycin production by 40%, reaching 30...
March 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28292609/organic-micropollutants-omps-oxidation-by-ozone-effect-of-activated-carbon-on-toxicity-abatement
#9
Oscar Rozas, Carolina Baeza, Katherine Núñez, Alfred Rossner, Roberto Urrutia, Héctor D Mansilla
Oxidation and removal of organic micropollutants (OMPs) on ultrapure (UPW) and natural water (NW) by ozone (O3) and ozone/powdered activated carbon (O3/PAC) have been studied. The OMPs atrazine (ATZ, herbicide), carbamazepine (CBZ, anticonvulsant), diclofenac (DCL, anti-inflammatory) and triclosan (TCS, antimicrobial) are incorporated continuously and uncontrolled on water treatment systems (e.g., drinking water treatment plants, wastewater treatment plants). Batch experiments on ultrapure and natural water showed that ATZ treated with O3 and O3/PAC has the slowest transformation rate (>90% at 30min reaction) while CBZ, DCL and TCS were oxidized very fast (>90% at ~5min)...
March 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28291611/degradation-kinetics-of-pharmaceuticals-and-personal-care-products-in-surface-waters-photolysis-vs-biodegradation
#10
Rosa María Baena-Nogueras, Eduardo González-Mazo, Pablo A Lara-Martín
Poor removal of many pharmaceuticals and personal care products (PPCPs) in sewage treatment leads to their discharge into the receiving waters, where they may cause negative effects. Their elimination from the water column depends of several processes, including photochemical and biological degradation. We have focused this research on comparing the degradation kinetics of a wide number (n=33) of frequently detected PPCPs considering different types of water, pH and solar irradiation. For those compounds that were susceptible of photodegradation, their rates (k) varied from 0...
March 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28290573/emerging-investigator-series-dual-role-of-organic-matter-in-the-anaerobic-degradation-of-triclosan
#11
Lin Wang, Shengnan Xu, Bo Pan, Yu Yang
Triclosan (TCS), one of the most widely used antimicrobial agents, has been listed among the top 10 contaminants in US rivers. Environmental persistence, endocrine disruption effects, and the antibiotic resistance induction capacity of TCS attract interest in its environmental fate and degradation. Herein, we found that TCS can be anaerobically degraded at pH 9 by a metal-reducing bacterium, Shewanella putrefaciens CN32. The degradation was substantially facilitated by low-concentration (0-15 mg C per L) organic matter (OM) extracted from a peat soil, whereas TCS degradation was inhibited by further increased concentration (15-100 mg C per L) of OM...
March 14, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28286702/plaque-removal-and-gingival-health-after-use-of-a-novel-dental-gel-a-clinical-study
#12
Anuradha Nayudu, Tracie Lam, Jessica Ho, Ali Forghany, Thinh Vu, William Ngo, Janet Ajdaharian, Petra Wilder-Smith
BACKGROUND: Goal of this in vivo prospective, randomized, controlled, double-blinded, cross over study was to compare the level of plaque control and gingivitis after use of a novel dental gel (test) vs. A Triclosan/copolymer dentifrice (control). METHODS: After coronal polishing, 22 subjects with moderate gingivitis were randomly assigned to brush twice daily with test or control dentifrice for the first study Arm. Plaque, gingival and sulcus bleeding indices were recorded at baseline, week 2 and week 4...
October 2016: Dentistry: Current Research
https://www.readbyqxmd.com/read/28286011/fate-of-trace-organic-contaminants-in-oxic-settling-anoxic-osa-process-applied-for-biosolids-reduction-during-wastewater-treatment
#13
Galilee U Semblante, Faisal I Hai, James McDonald, Stuart J Khan, Mark Nelson, Duu-Jong Lee, William E Price, Long D Nghiem
This study investigated the fate of trace organic contaminants (TrOCs) in an oxic-settling-anoxic (OSA) process consisting of a sequencing batch reactor (SBR) with external aerobic/anoxic and anoxic reactors. OSA did not negatively affect TrOC removal of the SBR. Generally, low TrOC removal was observed under anoxic and low substrate conditions, implicating the role of co-metabolism in TrOC biodegradation. Several TrOCs that were recalcitrant in the SBR (e.g., benzotriazole) were biodegraded in the external aerobic/anoxic reactor...
February 16, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28267557/investigation-of-the-mechanism-of-triclosan-induced-mouse-liver-tumors
#14
Zemin Wang, Xilin Li, James E Klaunig
Chronic dietary exposure to Triclosan (TCS) produced increased incidence of liver tumors in mice. The mechanism for liver tumor induction has been attributed to activation of either peroxisome proliferator activated receptor α (PPARα) or constitutive androstane receptor (CAR). To further define the mechanism of TCS induced liver tumors, male CD-1 and C57BL/6 mice were treated with TCS at 0, 10, 100 and 200 mg/kg diet/day for 14 or 28 days. In addition, a recovery group and positive control groups for CAR or PPARα activation with either phenobarbital or diethylhexyl-phthalate were included in the 14-day study...
March 4, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28264771/occurrence-and-ecological-risk-assessment-of-emerging-organic-chemicals-in-urban-rivers-guangzhou-as-a-case-study-in-china
#15
Feng-Jiao Peng, Chang-Gui Pan, Min Zhang, Nai-Sheng Zhang, Ronja Windfeld, Daniel Salvito, Henriette Selck, Paul J Van den Brink, Guang-Guo Ying
Urban rivers may receive contamination from various sources including point sources like domestic sewage and nonpoint sources (e.g., runoff), resulting in contamination with various chemicals. This study investigated the occurrence of emerging organic contaminants (3 endocrine disrupting compounds (EDCs), and 17 pharmaceuticals and personal care products (PPCPs)) in six urban rivers of a representative subtropical city, Guangzhou (southern China). Our results showed that EDCs and personal care products were frequently detected in the water phase and sediment phase...
March 2, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28260683/endocrine-related-genes-are-altered-by-antibacterial-agent-triclosan-in-chironomus-riparius-aquatic-larvae
#16
Pedro Martínez-Paz, Mónica Morales, Josune Urien, Gloria Morcillo, José Luis Martínez-Guitarte
Triclosan (TCS) is an antibacterial agent widely used in personal care and consumer products and commonly detected in aquatic ecosystems. In the present study, the effects of TCS on endocrine-related genes of Chironomus riparius aquatic larvae, a reference organism in aquatic toxicology, were evaluated. Twenty-four-hour in vivo exposures at 10µg/L, 100µg/L, and 1000µg/L TCS revealed that this xenobiotic was able to alter the transcriptional activity of ecdysone receptor gene (EcR), the ultraspiracle gene (usp), the estrogen-related receptor gene (ERR), and the E74 early ecdysone-inducible gene, as measured by real-time RT-PCR...
March 2, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28256742/halogenated-phenolic-compounds-in-wild-fish-from-canadian-areas-of-concern
#17
Ève A M Gilroy, Derek C G Muir, Mark E McMaster, Colin Darling, Linda M Campbell, Mehran Alaee, Scott B Brown, James P Sherry
Concentrations of halogenated phenolic compounds (HPCs) were measured in the plasma of brown bullhead (Ameiurus nebulosus) from four Canadian Areas of Concern (AOCs), to assess exposure to suspected thyroid disrupting chemicals. Hydroxylated PCBs (OH-PCBs) were detected in every sample collected in three of the AOCs; the detection frequency was lower in samples from the Detroit River AOC. Hydroxylated-PCBs most frequently detected were pentachloro, hexachloro- and heptachloro- congeners structurally similar to thyroid hormones...
March 3, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28251860/time-weighted-average-concentration-monitoring-based-on-thin-film-solid-phase-microextraction
#18
Fardin Ahmadi, Chris Sparham, Ezel Boyaci, Janusz Pawliszyn
Time weighted average (TWA) passive sampling with thin film solid phase microextraction (TF-SPME) and liquid chromatography tandem mass spectrometry (LC-MS/MS) was used for collection, identification, and quantification of benzophenone-3, benzophenone-4, 2-phenylbenzimidazole-5-sulphonic acid, octocrylene, and triclosan in the aquatic environment. Two types of TF-SPME passive samplers, including a retracted thin film device using a hydrophilic lipophilic balance (HLB) coating, and an open bed configuration with an octadecyl silica-based (C18) coating, were evaluated in an aqueous standard generation (ASG) system...
March 2, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28249228/calcium-mediates-the-cellular-response-of-chlamydomonas-reinhardtii-to-the-emerging-aquatic-pollutant-triclosan
#19
Miguel González-Pleiter, Carmen Rioboo, María Reguera, Isidro Abreu, Francisco Leganés, Ángeles Cid, Francisca Fernández-Piñas
The present study was aimed at investigating the role of intracellular free calcium, [Ca(2+)]c, in the early cellular response of the green alga Chlamydomonas reinhardtii to the emergent pollutant Triclosan (13.8μM; 24h of exposure). There is a growing concern about the persistence and toxicity of this antimicrobial in aquatic environments, where non-target organisms such as C. reinhardtii, a primary producer of ecological relevance, might be severely impacted. A mechanistic study was undertaken which combined flow cytometry protocols, physiological as well as gene expression analysis...
February 22, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28236114/methyl-triclosan-and-triclosan-impact-embryonic-development-of-danio-rerio-and-paracentrotus-lividus
#20
Sofia Macedo, Tiago Torres, Miguel M Santos
The presence of emerging pollutants in the environment is of major concern not only because of the potential negative impact in human health, but also due to the potential toxicity to non-target organisms. Within the personal and care products (PCPs), the disinfectant Triclosan (TCS) is one of the most concerning compounds. Once in the wastewater treatment plants (WWTPs), a small part of TCS can be biotransformed into a more persistent by-product: methyl-triclosan (M-TCS). Although several studies have focused on the occurrence of this compound in the water systems, the information on its toxicity to aquatic organisms is very limited...
February 24, 2017: Ecotoxicology
keyword
keyword
101275
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"