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Sodium hypochlorite

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https://www.readbyqxmd.com/read/29793109/17%C3%AE-estradiol-as-precursors-of-cl-br-dbps-in-the-disinfection-process-of-different-water-samples
#1
Yanan Shao, Zihan Pan, Chuan Rong, Yinghui Wang, Hongxiang Zhu, Yuanyuan Zhang, Kefu Yu
During chlorine disinfection process, reactions between the disinfectant and 17β-estradiol (E2) lead to the formation of halogenated disinfection byproducts (DBPs) which can be a risk to both ecosystem and human health. The degradation and transformation products of E2 in sodium hypochlorite (NaClO) disinfection processes of different water samples were investigated. The reaction kinetics research showed that the degradation rates of E2 were considerably dependent on the initial pH value and the types of water samples...
May 21, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29790590/evaluation-of-biofilm-removal-and-adverse-effects-on-acrylic-resin-by-diluted-concentrations-of-sodium-hypochlorite-and-ricinus-communis-solutions
#2
Carolina N F Arruda, Marcela M Salles, Maurício M Badaró, Danilo B Sorgini, Viviane C Oliveira, Ana P Macedo, Cláudia H Silva-Lovato, Helena F O Paranhos
PURPOSE: To verify whether 0.1% and 0.2% sodium hypochlorite (NaOCl), and 8% Ricinus communis (RC) were able to remove denture biofilm without causing deleterious effects to acrylic resin. BACKGROUND: Previous data show that denture cleansers are effective in reducing biofilm; however, they can change acrylic resin properties. METHODS: In a crossover trial, 47 denture wearers brushed and soaked their dentures (20 min/14 d): control, 0.85% saline; SH1, 0...
May 23, 2018: Gerodontology
https://www.readbyqxmd.com/read/29787973/mitigation-of-algal-organic-matter-released-from-chaetoceros-affinis-and-hymenomonas-by-in-situ-generated-ferrate
#3
Bhaskar Jyoti Deka, Sanghyun Jeong, S Assiyeh Alizadeh Tabatabai, Alicia Kyoungjin An
This study demonstrates the application of in situ ferrate (Fe(VI)) for the efficient removal of dissolved algal organic matter (AOM) from seawater. Sodium hypochlorite (NaOCl) and ferric (Fe(III)) were used to produce in situ Fe(VI) by wet chemical oxidation. First, the removal efficiencies of two model AOM compounds, humic acid (HA) and sodium alginate (SA), were evaluated in the presence of sodium chloride with an initial influent dissolved organic carbon (DOC) concentration of 5.0 mg C L-1 at different pH levels to establish the optimal doses for in situ Fe(VI) generation...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29783625/a-simple-alternative-method-for-preservation-of-2-methylisoborneol-in-water-samples
#4
Chun-Cheng Fan, Yi-Ting Chiu, Tsair-Fuh Lin
2-Methylisoborneol (2-MIB) is one of the most commonly observed taste and odor (T&O) compounds present in drinking water sources. As it is biodegradable, a preservation agent, typically mercury chloride, is needed if the water is not analyzed right after sampling. Since mercury is a toxic metal, an alternative chemical that is cheaper and less toxic is desirable. In this study, two chemicals commonly used in water treatment processes, chlorine (as sodium hypochlorite) and KMnO₄ (potassium permanganate), are studied to determine their feasibility as preservation agents for 2-MIB in water...
May 18, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29780745/impact-of-minimal-root-canal-taper-on-the-fracture-resistance-of-endodontically-treated-bicuspids
#5
Carla Zogheib, Germain Sfeir, Gianluca Plotino, Gustavo De Deus, Maha Daou, Issam Khalil
Objective: Minimal invasive endodontics preserve coronal and radicular tooth structure to increase the fracture resistance of teeth. The aim of this study was to assess the influence of final preparation taper on the fracture resistance of maxillary premolars. Materials and Methods: Sixty maxillary premolars were selected and divided into 2 groups: 30 were shaped with a final apical diameter 30 and a 4% taper and 30 with 6% taper using iRaCe® instrument (FKG dentaire, Switzerland)...
March 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29778432/the-effect-of-exposure-to-sub-inhibitory-concentrations-of-hypochlorite-and-quaternary-ammonium-compounds-on-antimicrobial-susceptibility-of-pseudomonas-aeruginosa
#6
Aya Mahmoud Nasr, Marwa Salah Mostafa, Heba Hamed Arnaout, Amal Ali Ali Elshimy
BACKGROUND: Pseudomonas is a group of medically important species that inhabit a wide range of niches, including hospital environments. Controversies have emerged about the possible link between improper use of disinfectants and the emergence of antibiotic resistance in bacteria. The aim of this study was to assess the effect of exposure of antibiotic-susceptible Pseudomonas isolates to sub-inhibitory concentrations of 2 disinfectants-didecyldimonium chloride and sodium hypochlorite-on their antibiotic susceptibility patterns...
May 16, 2018: American Journal of Infection Control
https://www.readbyqxmd.com/read/29778199/disinfection-of-transboundary-animal-disease-viruses-on-surfaces-used-in-pork-packing-plants
#7
Peter W Krug, Talina Davis, Catherine O'Brien, Michael LaRocco, Luis L Rodriguez
In the event of an intentional or accidental incursion of a transboundary animal disease (TAD) virus into the US, a major concern to the meat industry would be the potential contamination of packing plants by processing infected animals. TAD agents such as foot and mouth disease virus (FMDV), African swine fever virus (ASFV) and classical swine fever virus (CSFV) are found in swine products such as blood and feces and are present in the tissues of infected animals. To test the disinfection of TAD viruses in a pork-packing environment, a previously developed disinfection assay was used to test two biocides currently used by industry sanitarians, against TAD viruses dried on industry relevant surfaces in saline or swine products...
June 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29778163/impacts-of-sodium-hydroxide-and-sodium-hypochlorite-aging-on-polyvinylidene-fluoride-membranes-fabricated-with-different-methods
#8
Qilong Wu, Xihui Zhang, Guodong Cao
This study compared the effects of chemical aging on the polyvinylidene fluoride (PVDF) membranes fabricated with the methods of non-solvent induced phase separation (NIPS) (named NIPS-PVDF) and thermally induced phase separation (TIPS) (named TIPS-PVDF). The chemical solutions of sodium hypochlorite (NaClO) and sodium hydroxide (NaOH) were chosen at the concentration of 5000mg/L. The equivalence of 5 and 10years was respectively selected as the time of aging. The physicochemical evolutions of membrane aging are characterized on the base of morphology analysis, chemical components, permeation ability and mechanical properties...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29775917/difficulties-in-interpretation-when-assessing-prolonged-and-subacute-exposure-to-the-toxic-effects-of-chlorine
#9
Marek Wiergowski, Ireneusz Sołtyszewski, Jacek Sein Anand, Michał Kaliszan, Jolanta Anita Wilmanowska, Zbigniew Jankowski, Marcin Łukasik
The purpose of this study was a toxicological interpretation of exposure to chlorine with unusual course. Medical, clinical and court records, as well as reviews of the literature, served as the basis for this interpretation. The first case of poisoning concerns a 52-year-old man who for a short time (probably several hours), during the industrial cleaning of facilities with sodium hypochlorite, was exposed to chlorine in a presumed high concentration. The man was obese and suffered from hypertension and moderate atherosclerosis, and therefore could be more susceptible to the toxic effects of chlorine...
May 8, 2018: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29767826/accidental-or-intentional-exposure-to-potentially-toxic-medications-natural-toxins-and-chemicals-during-pregnancy-analysis-of-data-from-tox-info-suisse
#10
Tabea Vogel, Saskia Lüde, Rahel Baumgartner, Christine Rauber-Lüthy, Ana Paula Simões-Wüst
OBJECTIVE: Affected women and health professionals are still often unsure about how to react to exposures to potentially harmful agents during pregnancy. We wanted to find out which agents worry both pregnant women and professionals, under what circumstances the exposures take place, how they are currently dealt with and how serious they are. METHODS: Making use of the archives of Tox Info Suisse, the foundation that provides poisons information in Switzerland both for members of the general public and for healthcare professionals, we set up an analysis of exposures to possibly harmful agents during pregnancy...
May 16, 2018: Swiss Medical Weekly
https://www.readbyqxmd.com/read/29765898/periodontal-healing-following-non-surgical-repair-of-an-old-perforation-with-pocket-formation-and-oral-communication
#11
Saeed Asgary, Prashant Verma, Ali Nosrat
Iatrogenic perforations negatively impact the outcome of endodontic treatments. Studies on prognostic factors showed that perforations in the coronal third of the root with periodontal pocket formation have an unfavorable prognosis. A 36-year-old female was referred for endodontic evaluation of tooth #13 with a history of an iatrogenic perforation, happened 3 years ago. There was a sinus tract associated with perforation, 10 mm probing on the mesial and mesio-palatal, bleeding on probing, radiolucent lesion adjacent to the perforation and complete resorption of the interdental bone between teeth #13 and #12...
May 2018: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29765895/effect-of-smear-layer-deproteinization-on-bonding-of-self-etch-adhesives-to-dentin-a-systematic-review-and-meta-analysis
#12
Khaldoan H Alshaikh, Hamdi H H Hamama, Salah H Mahmoud
Objectives: The aim of this systematic review was to critically analyze previously published studies of the effects of dentin surface pretreatment with deproteinizing agents on the bonding of self-etch (SE) adhesives to dentin. Additionally, a meta-analysis was conducted to quantify the effects of the above-mentioned surface pretreatment methods on the bonding of SE adhesives to dentin. Materials and Methods: An electronic search was performed using the following databases: Scopus, PubMed and ScienceDirect...
May 2018: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29763357/comparative-evaluation-of-endovac-and-conventional-irrigating-syringe-on-apical-extrusion-in-primary-molars-an-in-vitro-study
#13
Nilaya Reddy Venumbaka, Porselvi Baskaran, Jayanthi Mungara, Madhan Chenchugopal, Arun Elangovan, Poornima Vijayakumar
OBJECTIVES: The present study was undertaken to evaluate and compare the apical extrusion of irrigant and depth of irrigant penetration into dentine using the EndoVac irrigating system and manual irrigation system in primary molar teeth. STUDY DESIGN: Twenty five extracted primary molars satisfying the inclusion and exclusion criteria were divided into two groups with 29 roots in each group with an equal distribution of apical foramen area. The teeth were mounted in pre-weighed glass bottles and the canals were irrigated with 5...
May 15, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29761412/persistence-of-hepatitis-a-virus-in-fresh-produce-and-production-environments-and-the-effect-of-disinfection-procedures-a-review
#14
REVIEW
N Cook, I Bertrand, C Gantzer, R M Pinto, A Bosch
Although information is limited, it is evident that prolonged persistence of infectious Hepatitis A virus (HAV) is a factor in the transmission of the virus via fresh produce. Consequently, data on persistence of the virus on produce, and in environments relevant to production, such as soils, water and surfaces, are required to fully understand the dynamics of transmission of HAV via foods. Furthermore, information on effective disinfection procedures is necessary to implement effective post-harvest control measures...
May 14, 2018: Food and Environmental Virology
https://www.readbyqxmd.com/read/29756274/niti-loss-on-the-dentinal-walls-and-instrument-deformation-during-root-canal-preparation
#15
Carolina Fabiana Centenaro, Fabiana Soares Grecca, Patrícia Maria Poli Kopper, Rodrigo Ricci Vivan, Jefferson Ricardo Pereira, Ricardo Abreu da Rosa, Paula Barcellos da Silva, Marcus Vinícius Reis Só
The purpose of this study was to quantify the presence of nickel (Ni) and titanium (Ti) on dentin walls of prepared root canals using Endosequence (ES) and Wave One (WO) systems, the deformation, and fracture of these instruments. Thirty extracted human premolar teeth were selected and prepared with WO, ES, and manually (control group-CG). Each instrument was used in four root canals. The root canals were irrigated with 2.5% sodium hypochlorite solution. After preparation, roots were sectioned longitudinally and the apical third was analyzed by scanning electron microscopy with X-ray microanalysis (SEM-EDS)...
May 13, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29748921/the-efficacy-of-an-electrolysed-water-formulation-on-biofilms
#16
Anne-Marie Salisbury, Steven L Percival
Electrolysed water is a basic process whereby an electric current is passed through deionised water containing a low concentration of sodium chloride in an electrolysis chamber, which results in a more complex chemistry resulting in the production of a strong bactericidal and fungicidal solution at the anode. This microbicidal solution contains hypochlorous acid that is fast-acting and environmentally safe, as upon bacterial killing, the equilibrium shifts from hypochlorous acid back to salt and water. Other antimicrobial agents produced in this process include sodium hypochlorite and chlorine...
May 11, 2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29742310/sampling-and-inactivation-of-wet-disseminated-spores-from-flooring-materials-using-commercially-available-robotic-vacuum-cleaners
#17
Katy-Anne Thompson, Susan Paton, Thomas Pottage, Allan Bennett
AIMS: Four commercially available robotic vacuum cleaners were assessed for sampling efficiency of wet disseminated Bacillus atrophaeus spores on carpet, Polyvinyl Chloride (PVC) and laminate flooring. Furthermore, their operability was evaluated and decontamination efficiency of one robot was assessed using a sodium hypochlorite solution. METHODS AND RESULTS: In an environmental chamber, robots self-navigated around 4 m2 of flooring containing a single contaminated 0...
May 9, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29735859/effect-of-deproteinization-before-and-after-acid-etching-on-the-surface-roughness-of-immature-permanent-enamel
#18
F Y Abdelmegid
Objective: The purpose of this in vitro investigation was to assess the effect of deproteinization before and after acid etching on the surface roughness of immature human enamel of permanent teeth compared to acid etching alone using noncontact three-dimensional (3D) optical profilometer. Materials and Methods: Forty-eight enamel blocks were randomly distributed into 4 groups (12 each) according to the surface treatment in the form of deproteinized with 2.5% sodium hypochlorite (NaOCl) before and after acid etching with 32% phosphoric acid (H3PO4) compared to application of H3PO4 alone...
May 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29735085/evaluating-the-effects-of-the-adulterants-in-milk-using-direct-infusion-high-resolution-mass-spectrometry
#19
Tatiane Melina Guerreiro, Diogo Noin de Oliveira, Carlos Fernando Odir Rodrigues Melo, Estela de Oliveira Lima, Marta da Silva Ribeiro, Rodrigo Ramos Catharino
Milk is an extremely complex food, capable of providing essential nutrients as well as being an important source of energy, and high-quality proteins and fats. Due to advances in technology, and to meet the increasing demand, production costs have increased, turning milk into a target of adulterations. Routine methods usually applied to certify the quality of the milk are restricted to microbiological tests, and assays that attest the nutritional composition within the expected values. However, potentially harmful byproducts generated by adulterating substances in general are not detected through these methodologies...
June 2018: Food Research International
https://www.readbyqxmd.com/read/29728008/the-action-of-chemical-and-mechanical-stresses-on-single-and-dual-species-biofilm-removal-of-drinking-water-bacteria
#20
I B Gomes, M Lemos, L Mathieu, M Simões, L C Simões
The presence of biofilms in drinking water distribution systems (DWDS) is a global public health concern as they can harbor pathogenic microorganisms. Sodium hypochlorite (NaOCl) is the most commonly used disinfectant for microbial growth control in DWDS. However, its effect on biofilm removal is still unclear. This work aims to evaluate the effects of the combination of chemical (NaOCl) and mechanical stresses on the removal of single and dual species biofilms of two bacteria isolated from DWDS and considered opportunistic, Acinectobacter calcoaceticus and Stenotrophomonas maltophilia...
August 1, 2018: Science of the Total Environment
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