Results: 952

Comparación de la precisión de la longitud de trabajo de cuatro localizadores apicales electrónicos con limas de acero inoxidable y níquel-titanio en conductos mesiovestibulares de primeras molares inferiores

Rev. cient. odontol; 8 (3), 2020
Objetivo: El propósito del estudio in vitro fue comparar la precisión de la longitud de trabajo de Root ZX mini, Proper Pixi, Woodpex III y Raypex 6 utilizando limas de acero inoxidable VDW C-Pilot n.º 15 y de níquel-titanio Maillefer n.º15. Materiales y métodos: Est...

Use and response to phosphorus by potato clones in two cropping systems

Biosci. j. (Online); 36 (6), 2020
The selection of potato plants (Solanum tuberosum L.) that are efficient in the use of phosphorus (P) plays an important role in increasing crop productivity, reducing the cost of production due to the high price of phosphate fertilizers, as well as reducing the pollution of the environment due to the be...

Equine yolk sac: a stem cells source

Int. j. morphol; 38 (5), 2020
SUMMARY: Mesenchymal stem cells are characterized by in vitro high proliferation and multilineage potential maintenance. This study aimed to isolate and characterize equine YS mesenchymal stem cells and compare these with amniotic membranes. The yolk sac (YS) and amniotic membranes (AM) were obtained fro...

Update on perioperative hypersensitivity reactions: joint document of the Brazilian Society of Anesthesiology (SBA) and Brazilian Association of Allergy and Immunology (ASBAI) - Part I: post-crisis guidelines and treatment

Rev. bras. anestesiol; 70 (5), 2020
Abstract Experts from the Brazilian Association of Allergy and Immunology (ASBAI) and the Brazilian Society of Anesthesiology (SBA) interested in the issue of perioperative anaphylaxis, and aiming to strengthen the collaboration between the two societies, combined efforts to study the topic and to prepar...

Comparative Biomechanical Study of Crosslinked Polyethylene Wear with 36-mm Ceramic Femoral Heads and with 32-mm Metal Femoral Heads

Abstract Objective This study aims to compare the in vitro wear rate of crosslinked, high molecular weight polyethylene coupled to 36-mm diameter ceramic heads and 32-mm diameter metal heads. Methods Ceramic-on-polyethylene (36 mm) and metal-on-polyethylene (32 mm) tribological pairs were submitted to ...

Nutritive value of elephant grass hay ammoniated by urea

Biosci. j. (Online); 36 (5), 2020
The aim of this study was to evaluate the effect of ammoniation by urea on the nutritional value of elephant grass hay harvested after flowering. A completely randomized design, in double factorial designs with an additional treatment: 4 urea doses (2, 4, 6 and 8%) x 2 treatment periods (3...

Lineamientos de validación de dispositivos médicos de diagnóstico in vitro en etapa de investigación - COVID-19. Documento Técnico

El documento contiene las pautas para garantizar la seguridad, calidad y desempeño en el desarrollo y validación de proyectos de investigación vinculados a los dispositivos de diagnóstico in vitro (DMDIVD), que permitan una autorización para la fabricación y uso....

Caracterización biológica de cepas del virus Encefalitis San Luis en células de la inmunidad innata
Biological characterization of St. Louis Encephalitis virus strains in cells of innate immunity

Los flavivirus transmitidos por mosquitos son una amenaza actual y emergente en todo el mundo. Dentro de este género, el virus Encefalitis San Luis (VESL) causa una forma severa de enfermedad neuroinvasiva donde la respuesta inmune es un componente crucial de la defensa del huésped. En este trabajo se ...

The evaluation of shear bond strength of resin-modified glass ionomer cement with the addition of 45S5 bioactive glass using two conventional methods

J. oral res. (Impresa); 9 (4), 2020
Introduction: There is a high prevalence of enamel caries around brackets due to the young age of the majority of orthodontic patients, and to the difficulty of plaque removal in presence of orthodontic appliances. Recently, protective agents such as bioactive glasses (BGs) were introduced to enhance rem...

Influence of dentin conditioning with polyacrylic acid on the shear bond strength of a nano-filled resin-modified glass ionomer cement

J. oral res. (Impresa); 9 (4), 2020
Purpose: This in vitro study aimed to evaluate the influence of dentin conditioning with polyacrylic acid on the shear bond strength of the nano-filled resin-modified glass ionomer cement Ketac N100 (3MESPE). Material and methods: Eighteen bovine incisors were randomly divided into two groups (n=18): gro...