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Hypochlorite

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https://www.readbyqxmd.com/read/28446851/an-invitro-evaluation-of-the-accuracy-of-two-electronic-apex-locators-to-determine-working-length-in-the-presence-of-various-irrigants
#1
Ashwini B Prasad, Srivastava Harshit, Srivastava Arora Aastha, Raisingani Deepak
BACKGROUND: Cleaning and shaping of root canal system requires various irrigating solutions. The question is whether the presence of irrigation solution alters working length determination using apex locators. The purpose of this study was to compare the accuracy of Root ZX and i-Root apex locator for determining working length in the presence of different irrigating solution. MATERIALS AND METHOD: Eighty extracted single rooted human teeth were used. The teeth were sectioned at Cemento Enamel Junction (CEJ) and actual canal length determined...
September 2016: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/28446771/monitoring-global-protein-thiol-oxidation-and-protein-s-mycothiolation-in-mycobacterium-smegmatis-under-hypochlorite-stress
#2
Melanie Hillion, Jörg Bernhardt, Tobias Busche, Martina Rossius, Sandra Maaß, Dörte Becher, Mamta Rawat, Markus Wirtz, Rüdiger Hell, Christian Rückert, Jörn Kalinowski, Haike Antelmann
Mycothiol (MSH) is the major low molecular weight (LMW) thiol in Actinomycetes. Here, we used shotgun proteomics, OxICAT and RNA-seq transcriptomics to analyse protein S-mycothiolation, reversible thiol-oxidations and their impact on gene expression in Mycobacterium smegmatis under hypochlorite stress. In total, 58 S-mycothiolated proteins were identified under NaOCl stress that are involved in energy metabolism, fatty acid and mycolic acid biosynthesis, protein translation, redox regulation and detoxification...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28441417/minimum-lethal-concentration-of-sodium-hypochlorite-for-the-amphibian-pathogen-batrachochytrium-dendrobatidis
#3
Matthew H Becker, Brian Gratwicke
Sodium hypochlorite (NaOCl) is the active ingredient in household bleach and is commonly used as a disinfectant to clean equipment contaminated by the amphibian pathogen Batrachochytrium dendrobatidis (Bd) in lab husbandry and field studies. We conducted a series of replicated exposure trials using a single Global Pandemic Lineage Bd isolate from Panama (JEL 310) and concentrations of NaOCl ranging from 0.006% to 0.6% for exposure times ranging from 30 seconds to 15 minutes to determine the minimum lethal concentration of NaOCl for this isolate of Bd...
2017: PloS One
https://www.readbyqxmd.com/read/28440832/nanoemitters-and-innate-immunity-the-role-of-surfactants-and-bio-coronas-in-myeloperoxidase-catalyzed-oxidation-of-pristine-single-walled-carbon-nanotubes
#4
Cheuk Fai Chiu, Haider H Dar, Alexandr A Kapralov, Renã A S Robinson, Valerian E Kagan, Alexander Star
Single-walled carbon nanotubes (SWCNTs) are experimentally utilized in in vivo imaging and photothermal cancer therapy owing to their unique physicochemical and electronic properties. For these applications, pristine carbon nanotubes are often modified by polymer surfactant coatings to improve their biocompatibility, adding more complexity to their recognition and biodegradation by immuno-competent cells. Here, we investigate the oxidative degradation of SWCNTs catalyzed by neutrophil myeloperoxidase (MPO) using bandgap near-infrared (NIR) photoluminescence and Raman spectroscopy...
April 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28432631/coumarin-based-fluorescent-probe-for-hypochlorites-and-real-application-in-tap-water
#5
Xiaohong Cheng, Shaohua Qu, Zhicheng Zhong, Wangnan Li
Taking advantages of both the oxidation property of hypochlorite and different coordination properties of Cu(+) and Cu(2+) ions, we developed a new fluorescent probe for hypochlorite anion, namely, compound C1. In the presence of ClO(-), the sensing system displayed extraordinary fluorescence quenching, which was beneficial to the production of a high signal output during detection process. By virtue of its special oxidation property, the probe displayed high selectivity for ClO(-) over other anions. Moreover, this novel sensing system could be used for the analysis of ClO(-) levels in tap water and potentially in environmental samples...
April 21, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28431257/integrated-antimicrobial-and-antifouling-ultrafiltration-membrane-by-surface-grafting-peo-and-n-chloramine-functional-groups
#6
Shuhua Hou, Jialin Xing, Xue Dong, Jifu Zheng, Shenghai Li
Ultrafiltration membranes with integrated antimicrobial and antifouling properties were fabricated using an engineering thermoplastic (carboxylated cardopoly(aryl ether ketone, PEK-COOH). Different molecular weights of PEO (Mw: 120, 350, 550) were grafted to the PEK-COOH membrane surface via EDC/NHS methodology. N-chloramine modified membranes then were prepared by simple exposure to dilute sodium hypochlorite solution. The surface grafting processes were all performed in water (i.e. without organic solvent)...
April 11, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28420487/personal-protective-equipment-solution-for-uk-military-medical-personnel-working-in-an-ebola-virus-disease-treatment-unit-in-sierra-leone
#7
P Reidy, T Fletcher, C Shieber, J Shallcross, H Towler, M Ping, L Kenworthy, N Silman, E Aarons
The combination of personal protective equipment (PPE) together with donning and doffing protocols was designed to protect British and Canadian military medical personnel in the Kerry Town Ebola Treatment Unit (ETU) in Sierra Leone. The PPE solution was selected to protect medical staff from infectious risks, notably Ebola virus, and chemical (hypochlorite) exposure. PPE maximized dexterity, enabled personnel to work in hot temperatures for periods of up to 2h, protected mucosal membranes when doffing outer layers, and minimized potential contamination of the doffing area with infectious material by reducing the requirement to spray PPE with hypochlorite...
March 18, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28418706/radiation-driven-formation-of-reactive-oxygen-species-in-oxychlorine-containing-mars-surface-analogues
#8
Christos D Georgiou, Dimitrios Zisimopoulos, Electra Kalaitzopoulou, Richard C Quinn
The present study demonstrates that γ-radiolyzed perchlorate-containing Mars soil salt analogues (in a CO2 atmosphere) generate upon H2O wetting the reactive oxygen species (ROS) superoxide radical (O2(•-)), hydrogen peroxide (H2O2), and hydroxyl radicals ((•)OH). This study also validates that analogue radiolysis forms oxychlorine species that, in turn, can UV-photolyze to (•)OH upon UV photolysis. This investigation was made possible by the development of a new assay for inorganic-origin O2(•-) and H2O2 determination and by the modification of a previous assay for soil (•)OH...
April 2017: Astrobiology
https://www.readbyqxmd.com/read/28416395/the-early-history-of-manganese-and-the-recognition-of-its-neurotoxicity-1837-1936
#9
Paul D Blanc
The history of the biomedical recognition manganese-caused neurotoxicity mirrors changing technologies as much as it does the ontology of parkinsonism. The initial 1837 report of manganese-induced neurologic injury was made by John Couper, a university-based physician in Scotland. He made clear that the outbreak occurred among workers at the Charles Tennant bleach manufactory in the environs of Glasgow. The relatively new technology of chlorine generation using manganese accounted for the novel exposure involved...
April 14, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28416316/effect-of-passive-ultrasonic-activation-on-organic-tissue-dissolution-from-simulated-grooves-in-root-canals-using-sodium-hypochlorite-with-or-without-surfactants-and-edta
#10
Roberto Estevez, Antonio J Conde, Oliver Valencia de Pablo, Francisco de la Torre, Giampiero Rossi-Fedele, Rafael Cisneros
INTRODUCTION: The aim of this study was to evaluate the porcine palatal mucosa dissolution from artificial grooves using a final rinse with sodium hypochlorite (NaOCl) with or without a surfactant or ultrasonic activation (PUI). METHODS: The root canals of 130 human maxillary central incisors were chemomechanically prepared and the teeth split. A standardized longitudinal intracanal groove was created in 1 of the root halves. One hundred thirty porcine palatal mucosa samples were collected, adapted in order to fit into the grooves, and weighed...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28407966/detection-of-several-common-adulterants-in-raw-milk-by-mid-infrared-spectroscopy-and-one-class-and-multi-class-multivariate-strategies
#11
Carina de Souza Gondim, Roberto Gonçalves Junqueira, Scheilla Vitorino Carvalho de Souza, Itziar Ruisánchez, M Pilar Callao
A sequential strategy was proposed to detect adulterants in milk using a mid-infrared spectroscopy and soft independent modelling of class analogy technique. Models were set with low target levels of adulterations including formaldehyde (0.074g.L(-1)), hydrogen peroxide (21.0g.L(-1)), bicarbonate (4.0g.L(-1)), carbonate (4.0g.L(-1)), chloride (5.0g.L(-1)), citrate (6.5g.L(-1)), hydroxide (4.0g.L(-1)), hypochlorite (0.2g.L(-1)), starch (5.0g.L(-1)), sucrose (5.4g.L(-1)) and water (150g.L(-1)). In the first step, a one-class model was developed with unadulterated samples, providing 93...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28403606/halogenated-organic-compounds-identified-in-hydraulic-fracturing-wastewaters-using-ultrahigh-resolution-mass-spectrometry
#12
Jenna L Luek, Philippe Schmitt-Kopplin, Paula J Mouser, William Tyler Petty, Susan D Richardson, Michael Gonsior
Large volumes of water return to the surface following hydraulic fracturing of deep shale formations to retrieve oil and natural gas. Current understanding of the specific organic constituents in these hydraulic fracturing wastewaters is limited to hydrocarbons and a fraction of known chemical additives. In this study, we analyzed hydraulic fracturing wastewater samples using ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) as a nontargeted technique to assign unambiguous molecular formulas to singly charged molecular ions...
April 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28400016/effect-of-sub-inhibitory-concentrations-of-biocides-on-the-architecture-and-viability-of-mrsa-biofilms
#13
Laura Buzón-Durán, Carlos Alonso-Calleja, Félix Riesco-Peláez, Rosa Capita
The effect of sub-minimum inhibitory concentrations (sub-MICs) of three biocides (benzalkonium chloride [BZK], trisodium phosphate [TSP] and sodium hypochlorite [SHY]) upon the architecture and viability of the biofilms formed by a methicillin-resistant Staphylococcus aureus strain of food origin (MRSA 48a) was investigated. Images were examined through confocal laser scanning microscopy (CLSM) after staining with SYTO9 and propidium iodide. Sub-MICs of BZK or TSP reduced the ability of MRSA to produce biofilm...
August 2017: Food Microbiology
https://www.readbyqxmd.com/read/28394240/effect-of-laser-activated-irrigations-on-smear-layer-removal-from-the-root-canal-wall
#14
Xiaoli Wang, Xiaogang Cheng, Baogang Liu, Xin Liu, Qing Yu, Wenxi He
OBJECTIVE: The purpose of this study was to evaluate the effect of laser-activated irrigations (LAI) by using the Erbium: Yttrium Aluminum Garnet (Er:YAG) laser and the Erbium Chromium: Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) laser on removing smear layer (SL) from the root canal wall. BACKGROUND DATA: LAI has been proposed as an adjuvant to conventional protocols of endodontic treatment to enhance the disinfection, which is a promising protocol for SL removal...
April 5, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28389372/rat-tissue-reaction-and-cytokine-production-induced-by-antimicrobial-photodynamic-therapy
#15
Gustavo Sivieri-Araujo, Índia Olinta de Azevedo Queiroz, Renan Dal Fabbro, Fernanda Esteves, Luciano Tavares Angelo Cintra, Paulo Carvalho Tobias Duarte, Vanderlei Salvador Bagnato, Sandra Helena Penha de Oliveira, João Eduardo Gomes-Filho
BACKGROUND: The antimicrobial photodynamic therapy (aPDT) inactivates the target cell via reactions among the photosensitizer (PS), Laser or Led and O2. The aim of this study was to evaluate the tissue reaction and cytokine production promoted by aPDT with curcumin photosensitizer. METHODS: Polyethylene tubes containing saline solution (control), 5% sodium hypochlorite (NaOCl) and aPDT with curcumin PS 500mg/L, were implanted into dorsal connective tissue of Wistar rats...
April 4, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28389075/the-antibacterial-effect-of-nd-yag-laser-treatment-of-teeth-with-apical-periodontitis-a%C3%A2-randomized-controlled-trial
#16
Maria Granevik Lindström, Eva Wolf, Helena Fransson
INTRODUCTION: The aim of this blind, in vivo, randomized controlled trial was to evaluate the antibacterial effect of Nd:YAG laser irradiation in endodontic treatment of single-rooted teeth with apical periodontitis. The hypothesis was that mechanical enlargement of the root canal and Nd:YAG laser irradiation would yield more negative bacterial samples than conventional treatment. METHODS: Forty-one patients (45 teeth) were allocated to the laser (n = 22) or control (n = 23) group...
April 4, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28384974/a-comparative-study-of-the-quality-of-apical-seal-in-resilon-epiphany-se-following-intra-canal-irrigation-with-17-edta-10-citric-acid-and-mtad-as-final-irrigants-a-dye-leakage-study-under-vacuum
#17
Saravana Karthikeyan Balasubramanian, Vidya Saraswathi, Nidambur Vasudev Ballal, Shashi Rashmi Acharya, J Sivakumar Sampath, Sandeep Singh
INTRODUCTION: Adequate apical sealing ability of the root canal filling material is an essential requisite for a successful endodontic therapy. Various endodontic irrigants are used for the removal of smear layer before obturating with a solid core material, thereby, reducing microleakage and improving apical seal. Resilon, a synthetic material was developed as an alternative to replace the conventional gutta-percha (standard root canal filling material) and traditional sealers for the obturation of endodontically treated teeth...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28383602/fungal-contamination-and-disinfection-of-dental-chairs-teresina-piaui-brazil
#18
Antônio Iv de Almondes, Jhonatta Op de Araújo, Larissa Mendes de Sirqueira Amaral, Renandro C Reis, Jhonatas Cs Porto, João Batista Teles, Thiago L Monte, Iraci de Ms Noleto, Tanit C Santos, Ivonizete P Ribeiro, Mitra Mobin
The aim of this study was to analyze fungal contamination on dental chairs at the clinic of a Higher Education Institution in TeresinaPI, Brazil, and to evaluate the effectiveness of different disinfectants: 70% alcohol and 1% sodium hypochlorite. We selected the five sites with most contact between patient and chair: headrest, backrest, armrests, seat and foot rest. Samples were collected from these sites on 14 chairs and inoculated in agar Sabouraud culture medium containing chloramphenicol. Pathogenic fungi were isolated from all sampling sites on the chairs...
December 2016: Acta Odontológica Latinoamericana: AOL
https://www.readbyqxmd.com/read/28382027/potential-for-biocontrol-of-hairy-root-disease-by-a-paenibacillus-clade
#19
Lien Bosmans, Irene De Bruijn, Saskia Gerards, Rob Moerkens, Lore Van Looveren, Lieve Wittemans, Bart Van Calenberge, Anneleen Paeleman, Stefan Van Kerckhove, René De Mot, Jef Rozenski, Hans Rediers, Jos M Raaijmakers, Bart Lievens
Rhizogenic Agrobacterium biovar 1 is the causative agent of hairy root disease (HRD) in the hydroponic cultivation of tomato and cucumber causing significant losses in marketable yield. In order to prevent and control the disease chemical disinfectants such as hydrogen peroxide or hypochlorite are generally applied to sanitize the hydroponic system and/or hydroponic solution. However, effective control of HRD sometimes requires high disinfectant doses that may have phytotoxic effects. Moreover, several of these chemicals may be converted to unwanted by-products with human health hazards...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28379524/evaluation-of-usda-approved-antimicrobials-on-the-reduction-of-salmonella-and-campylobacter-in-ground-chicken-frames-and-their-effect-on-meat-quality
#20
A Moore, R Nannapaneni, A Kiess, C S Sharma
The main objective of this study was to examine the efficacy of USDA approved antimicrobials in reducing Salmonella Heidelberg (S. H.) and Campylobacter jejuni (C. j.) in ground chicken frames and to determine the treatment effects on total aerobic counts and meat color. Six antimicrobials (0.1% peracetic acid [PAA], 0.6% cetylpyridinium chloride [CPC], 0.005% sodium hypochlorite, 1.5% acidified lactic acid [ALA], 0.3% propionic acid, and 0.1% lauric arginate [LAE]) applied as dip treatments were evaluated in their efficacy in reducing S...
March 31, 2017: Poultry Science
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