The kinetics of oxidation of polyvinyl alcohol, FH-17, with sodium hypochlorite has been studied. The effects of ~ buffer concentration, pH, initial oxidant concentration and temperature of reaction on the rate of reaction have been investigated. The experimental data indicate that the reaction is first order with respect to hypochlorite concentration. Additional data on change in the rate of r...

In this work, the behavior of the polycyclic musks 6-acetyl-1,1,2,4,4,7-hexamethyltetraline (AHTN) and 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta-γ-2-benzopyran (HHCB) was investigated upon disinfection by using sodium hypochlorite as disinfectant in a model disinfection basin in order to find new disinfection by-products (DBP). In the case of AHTN, the carboxylic acid 3,5,5,6,8,8-h...

introduction: the purpose of the present study was to evaluate the different concentrations of sodium hypochlorite activated with laser in removing of the smear layer in the apical, middle, and coronal segments of root canal walls by scanning electron microscopy analysis. methods: sixty single-rooted human mandibular teeth were decoronated to a standardized length. the samples were prepared by ...

background and aims. current chemical methods may not efficiently disinfect dental stone casts. the aim of this study was to investigate if microwave irradiation is effective for disinfection of stone casts. materials and methods. in this laboratory study, three groups (n = 162) of prepared spherical stone beads as carriers with a diameter of 10 mm were inoculated by separately soaking in three...

introduction: the aim of this study was to compare the efficacy of two irrigants on decreasing the pain and swelling at different times after treatment of necrotic pulp. materials and methods: fifty patients with single canal tooth and necrotic pulp were selected and divided into two groups, twenty-five in each. rotary files were used for preparing the canals and 0.2% chlorhexidine gluconate an...

: Nosocomial infections may result from intensive care unit pulse oximeters. The descriptive study examined oximeter sensor microbiological contamination and the efficacy of manual disinfection with alcohol sodium hypochlorite in five hospital units. Sixty-eight reusable sensors were swabbed, cultured, evaluated after decontamination. In private public hospitals, 12 (35.2%) 13 (37.2%) oximeters...

Disinfectant tunnels have attracted attention as a potential measure to prevent the spread of COVID-19, but their safety and effectiveness are questionable. Disinfectants such sodium hypochlorite were used, yet no scientific evidence is available on its eliminate SARS-CoV-2 human body through spraying, although this chemical effective in elimination virus inanimate surfaces. Since issues import...

statement of problem: it is necessary to use irrigation solutions during cleaning and shaping of root canals to efficiently reduce the number of micro organisms. sodium hypochlorite is used as an effective antibacterial endodontic irrigants. however, the extract of pennyroyal plant has also shown anti-bacterial characteristics comparable with antibacterial drugs. objectives: to compare the anti...

introduction: the purpose of this study was to compare the antimicrobial efficacy of sodium hypochlorite (sh) and calcium hypochlorite (ch) against enterococcus faecalis (e. faecalis) using quantitative real-time polymerase chain reaction (qpcr) analysis and also to compare their cytocompatibility on l929 murine fibroblasts using mossman’s tetrazolium toxicity (mtt) assay. methods and materials...