Bht
Mostrando 1-12 de 206 artigos, teses e dissertações.
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1. Effect of a polymerization inhibitor on the chemomechanical properties and consistency of experimental resin composites
Resumo O objetivo foi investigar o efeito do inibidor de polimerização BHT no grau de conversão (GC), resistência à flexão (RF), módulo de flexão (MF), microdureza Knoop (KH) e redução da microdureza (RKH), e consistência de um compósito experimental contendo diferentes concentrações de BHT (% em peso): C0 - controle (0%); C0,01 (0,01%); C0,025
Brazilian Dental Journal. Publicado em: 2022
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2. Determination of Total Antioxidant Capacity Using Thiamine as a Natural Fluorescent Probe
This work proposes a spectrofluorometric method for the determination of total antioxidant capacity (CAO) in beverage samples, based on inhibition of thiochrome formation (λex = 370 nm, λem = 440 nm); a product of thiamine (vitamin B1) oxidation from K3Fe(CN)6. In the development of the method, gallic acid (GA) was used as a reference, and inhibition of th
J. Braz. Chem. Soc.. Publicado em: 2020-12
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3. Composition, antioxidant properties, and biological activities of the essential oil extracted from Ocotea diospyrifolia (Meisn.) Mez.
The article has aimed to characterize the essential oil extracted from Ocotea diospyrifolia (Meisn.) Mez. leaves, in terms of its chemical composition and antioxidant, hemolytic, and phytotoxic potentials, as well as its toxicity against Artemia salina. The major constituents identified by CG-MS were d-elemene, spathulenol, and b-atlantol. When screened for
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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4. Evaluation of oxidative stability of mayonnaise containing poly ε- caprolactone nanoparticles loaded with thyme essential oil
Suspensions of poly ε-caprolactone (PCL) nanoparticles loaded with thyme essential oil were prepared as a natural antioxidant in mayonnaise. Mean particle size was 204.9 ± 2.7 and 240.0 ± 5.5 nm respectively for nanoparticles prepared with PCL alone (NP-C) and for those loaded with thyme essential oil (NP-T). The polydispersity index indicated a homogeneo
Braz. J. Pharm. Sci.. Publicado em: 10/07/2019
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5. ADIÇÃO DE HIDROXITOLUENO BUTILADO (BHT) NO DILUIDOR ACP-106c PARA CONGELAÇÃO DE SÊMEN CANINO
Resumo: Este estudo foi realizado para determinar o efeito de hidroxitolueno butilado (BHT) sobre a qualidade do sêmen canino congelado e descongelado, utilizando o diluidor à base de água de coco em pó (ACP-106c). Para tanto, foram realizadas quinze coletas de sêmen provenientes de cinco cães. O sêmen obtido foi diluído em ACP-106c acrescido de glic
Ciênc. anim. bras.. Publicado em: 30/07/2018
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6. Caracterização fitoquímica do óleo de soja adicionado de extrato de Portulaca oleracea L.
RESUMO Este trabalho teve como principais objetivos medir o teor de compostos fenólicos totais e a atividade antioxidante do extrato de Portulaca oleracea L., além de avaliar a estabilidade oxidativa e a retenção dos compostos fitoquímicos presentes no óleo de soja adicionado de antioxidantes sintéticos (TBHQ e BHT) e naturais (Extrato de Portulaca ol
Rev. Ceres. Publicado em: 2018-02
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7. Rosemary as natural antioxidant to prevent oxidation in chicken burgers
Abstract Rosemary (Rosmarinus officinalis) is known for their sensory characteristics and antioxidant properties, mainly due to the presence of several phenolic compounds. The aim of this work, was determine the antioxidant activity and apply the Rosemary lyophilized extract (RLE) in chicken burger, for assess their ability to reduce the lipid oxidation. Tot
Food Sci. Technol. Publicado em: 31/07/2017
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8. Aplicação e avaliação de própolis, o antioxidante natural, em salame tipo Italiano
Resumo O presente estudo teve por finalidade caracterizar a própolis quanto à sua atividade antioxidante e aplicá-la na elaboração de salame tipo italiano. Amostra de própolis foi coletada e submetida à caracterização físico-química, química e capacidade antioxidante. Quatro formulações de salame foram elaboradas: F1 (sem antioxidante), F2 (adi
Braz. J. Food Technol.. Publicado em: 06/02/2017
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9. EXTRACT OF Punica granatum L.: AN ALTERNATIVE TO BHT AS AN ANTIOXIDANT IN SEMISSOLID EMULSIFIED SYSTEMS
Pomegranate (Punica granatum L.) is a fruit which has important pharmacological activities and has been attracting attention due to its important antioxidant activity, a significant feature in relation to cosmetics. Formulations containing different concentrations of an ethanolic extract of pomegranate (0.1, 1.0 and 5.0%) (w/w) as an antioxidant agent showed
Quím. Nova. Publicado em: 2017-01
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10. Cerebral vasomotor reactivity assessment using Transcranial Doppler and MRI with apnea test
Differently from previous studies that used Transcranial Doppler (TCD) and functional MRI (fMRI) for cerebral vasomotor reactivity (CVR) assessment in patients with carotid stenosis (CS), we assessed CVR using an identical stimulus, the Breath-Holding Test (BHT). We included 15 patients with CS and 7 age-matched controls to verify whether fMRI responded diff
Braz J Med Biol Res. Publicado em: 24/10/2016
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11. Phenolic extracts of coconut oil cake: a potential alternative for synthetic antioxidants
Abstract Limitations of natural antioxidants include relatively low antioxidant activity, narrow range of food systems where the antioxidants are effective and limited thermal stability compared to synthetic antioxidants. In the present study, the phenolic extract of coconut oil cake (COCE) was tested for antioxidant activity-related food stabilization. Heat
Food Sci. Technol. Publicado em: 29/08/2016
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12. Comparative Assessment of stabilised Polybutadiene Binder under Accelerated Ageing
ABSTRACT Polybutadiene elastomers are versatile materials, being employed at several applications from rocket propellant binder to adhesives and sealants. The elastomers derived from hydroxyl-terminated polybutadiene are usually stabilised with antioxidants to prevent degradation. In this study, a comparative assessment among 2,2’-methylene-bis (4-methyl-6
J. Aerosp. Technol. Manag.. Publicado em: 2016-06