Thixotropy
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Assessment of an anti-ageing structured cosmetic formulation containing goji berry
Based on previous studies, it has been found that goji berry (GB), popularly known as a ‘miracle fruit’, has excellent antioxidant potential and can be used in the treatment of skin disorders associated with ageing. This study aimed to incorporate GB into a structured cosmetic in order to optimise its penetration. Stability studies of the formulation, de
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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2. Factorial design applied to sodium activation of a Brazilian bentonite
Resumo Bentonitas sódicas são muito utilizadas na indústria por possuírem propriedades específicas desejáveis para diferentes finalidades, como inchamento, tixotropia, e capacidade de troca catiônica elevados. Por outro lado, bentonitas cálcicas e policatiônicas, predominantes no Brasil, necessitam de beneficiamento químico através da ativação s
Cerâmica. Publicado em: 06/06/2019
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3. Correlation between rheological properties and capillary fixation for modelling creams
The Brazilian male beauty market occupies the second place in world consumption of cosmetics. Among the numerous products consumed by such audience is the capillary fixation mask, which is mainly composed by fixatives. These additives act on stabilizing the cosmetic emulsion, protecting the hair against moisture and also increasing the intensity of hair fixa
Braz. J. Pharm. Sci.. Publicado em: 29/11/2018
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4. Humic Acid as Dispersant of an Alumina Suspension and its Rheological Behaviour
Humic acid was extracted and employed as a dispersant in an alumina suspension. The higher zeta potential for HA (-42 mV) was measured at pH 11 showing that an electrostatic repulsion might occur in the alumina/HA suspension. As a consequence of the long chain molecules of HA it was also expected a steric effect on deflocculation. The best dispersion conditi
Mat. Res.. Publicado em: 15/01/2018
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5. Multiple emulsions containing amazon oil: açaí oil (Euterpe oleracea)
The aim of this work was to formulate O/W/O multiple emulsions containing açaí oil as a model system and to evaluate their physical stability and in vivo Sun Protection Factor (SPF). Multiple emulsions are complex dispersion systems, known also as, "emulsions of emulsions". These emulsion systems, have significant potential in the cosmetic industry. Euterp
Revista Brasileira de Farmacognosia. Publicado em: 03/06/2011
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6. Obtenção e caracterização de espumas cerâmicas de alumina para uso como queimadores radiantes
Ceramic foams are cellular porous ceramics that can be produce by different methods, like replica method, sacrificial template method and direct foaming method. Foams are a type of porous ceramic which present many properties making them a very versatile material, used in different applications, like radiant porous burners. Radiant burners consist of ceramic
Publicado em: 2009
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7. Analysis of the application potentiality of nodular cast iron ASTM A536 60-40-18 as raw material for thixoforming processes / Estudo da potencialidade da aplicação do ferro fundido nodular ASTM A536 60-40-18 como materia prima para processos de tixoconformação
This work analyses the thixoability, the viability of actual production of thixotropic semi-solid of ferritic nodular cast iron ASTM A536 60-40-18, as well as the phase transformations taking place in the process. Thixoability evaluation is made through thermal analysis by Differential Thermal Analysis (DTA) and Differential Scanning Calorimetry (DSC) tests
Publicado em: 2009
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8. Suspensões magneto-reologicas de pos de ferro carbonilo : um estudo da influencia das propriedades magneticas e do tamanho das paritculas / Magneto-rheological suspensions: a study of the influence of the magnetic properties and particle size of carbonyl iron powder
The particle size distribution and magnetic susceptibility of some commercial carbonyl iron powders (code names CC, CS, HQ, OX and SM) were measured. The particle size of the powders increases as follows: HQ
Publicado em: 2005
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9. Reometria de suco concentrado de frutas
This is an experimental investigation on rheometry of marketed concentrated fruit juice of cashew, orange, lime and passion fruit. The purpose was the comparison of results obtained from three measuring systems: parallel plates, Searle concentric cylinders and double gap. Concentration ranged within 35 to 65 °Brix and temperature within 50 to 80°C. The Sea
Publicado em: 1996
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10. Suco de laranja concentrado : comportamento reologico a baixas temperaturas
This work determined the Mow behaviour of orange juice (pear orange), with 10 per cent of suspended pulp, in the concentrations of 55,0, 60,0 and 64,2 °Brix. The temperature range for the concentrations of 64,2 and 55,0 °Brix was from 20,5 to -19,4 (>C and for concentrations of 60,0 °Brix from +20,0 to -23,0 °C. Experimental data were fitted by Casson, H
Publicado em: 1995
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11. Caracterização de geis tixotropicos utilizados em telecomunicações
This work is enclosed in a project of development of national technology in Telecommunications with participation of UNICAMP and TELEBRÁS Research and Development Center. Today, a number of the materials used in optical cables are imported, without a specific knowledge of their behavior in the Brazilian climate conditions. The gels used for cable filling ar
Publicado em: 1992
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12. Control and postural thixotropy of the forearm muscles: changes caused by cold.
The forearm was cooled in water at 5-10 degrees C while wrist biodynamics were investigated. Pronounced loosening following a perturbation (thixotropy) was no longer seen. The wrist became stiffer for large or moderate but not small movements; EMG activity did not increase. Cooling the wrist alone, or opposite forearm, was without effect. The ability to make