Results: 88

Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

Abstract This study evaluated the removal of filling material with ProTaper Universal Rotary Retreatment system (PTR) combined with solvents and the influence of solvents on the bond strength (PBS) of sealer to intraradicular dentin after canal reobturation. Roots were endodontically treated and distribu...

Cigarrillos eléctrónicos: ¿Podemos recomendar su uso?

Los cigarrillos electrónicos (Cig-e) son dispositivos que contienen un líquido compuesto por un solvente, saborizantes y, en la mayoría de los casos, nicotina. Este liquido, al ser calentado en el dispositivo, se vaporiza, siendo aspirado por el usuario. En los últimos años, el uso de los Cig-e ha a...

Caracterização do perfil auditivo de frentistas de postos de combustível

Audiol., Commun. res; 22 (), 2017
RESUMO Introdução Pesquisas voltadas para as populações com baixas exposições a solventes, ou exposições dentro dos níveis de tolerância permitidos em âmbito ocupacional ainda são restritas. Objetivo Caracterizar o perfil auditivo de frentistas de postos de combustíveis. Métodos Estud...

Improvement of physicochemical parameters of acyclovir using cocrystallization approach

Braz. j. pharm. sci; 52 (4), 2016
ABSTRACT Acyclovir is an antiviral drug having potent activity against the virus of herpes family and varicella zoster. Unfortunately, drug suffers very poor oral bioavailability (15-30%). The main objective of present study was to develop acyclovir cocrystals with improved solubility which may result in...

Process optimization for production and purification of a thermostable, organic solvent tolerant lipase from Acinetobacter sp. AU07

Braz. j. microbiol; 47 (3), 2016
ABSTRACT The purpose of this study was to isolate, purify and optimize the production conditions of an organic solvent tolerant and thermostable lipase from Acinetobacter sp. AU07 isolated from distillery waste. The lipase production was optimized by response surface methodology, and a maximum production...

Complicaciones pulmonares de la neumonía química: A propósito de un caso

Arch. argent. pediatr; 114 (4), 2016
La aspiración de hidrocarburos puede causar un daño significativo a los pulmones al inducir una respuesta inflamatoria, alveolitis exudativa hemorrágica y pérdida de la función del tensioactivo pulmonar. El efecto secundario más grave de la aspiración de hidrocarburos es la neumonía por aspiraci...

Antimicrobial activity of chitosan coatings and films against Listeria monocytogenes on black radish

Rev. argent. microbiol; 48 (2), 2016
The antibacterial activity of chitosan coatings prepared with acetic or lactic acid, as well as of composite chitosan-gelatin films prepared with essential oils, was evaluated in fresh shredded black radish samples inoculated with Listeria monocytogenes ATCC 19115 and L. monocytogenes ATCC 19112 during s...

Enhanced production and organic solvent stability of a protease fromBrevibacillus laterosporus strain PAP04

Braz. j. med. biol. res; 49 (4), 2016
A bacterial strain (PAP04) isolated from cattle farm soil was shown to produce an extracellular, solvent-stable protease. Sequence analysis using 16S rRNA showed that this strain was highly homologous (99%) to Brevibacillus laterosporus. Growth conditions that optimize protease production in this strain ...

Dissolution of a mineral trioxide aggregate sealer in endodontic solvents compared to conventional sealers

Braz. oral res. (Online); 30 (1), 2016
Abstract The aim of this study is to evaluate the solubility of a Mineral Trioxide Aggregate sealer (MTA-Fillapex) compared with five other sealers, calcium hydroxide (Sealapex), resin (Realseal), zinc oxide-eugenol (Tubli-Seal), and two epoxy resins (AH-26 and AH-Plus), in chloroform and eucalyptoil in ...

Effect of the time-point of acid etching on the persistence of sealer residues after using different dental cleaning protocols

Braz. oral res. (Online); 30 (1), 2016
Abstract: Endodontic sealer residues remaining within the pulp chamber dentin after root canal obturation and cleaning with various solvents may compromise the appearance and the durability of dental restorations. Acid etching is routinely performed prior to application of dentine adhesive systems, but i...