Thermoanalytical Study
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Guava: phytochemical composition of a potential source of antioxidants for cosmetic and/or dermatological applications
ABSTRACT Guava (Psidium guajava L.) is a native fruit of the American tropics with commercial applications for its taste, flavor and aroma. Numerous pharmacological uses have been described for it, such as the antiseptic effect of its leaves, the use of the fresh fruit and tea from its leaves for the treatment of diarrhea, dysentery, diabetes mellitus, and o
Braz. J. Pharm. Sci.. Publicado em: 22/06/2017
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2. Caracterização termoanalítica e estudo de cura de compósito de resina epóxi e mica com propriedades elétricas isolantes aplicado em máquinas hidrogeradoras / Thermoanalytical Charactherization and Cure Study of an Epoxy resin and Mica Composite with Insulating Electrical Properties applied in Hydrogenerators Machines
Atualmente, a participação da energia elétrica na matriz energética mundial é um assunto em evidência. O estudo do compósito isolante da barra estatórica, um dos componentes principais da máquina hidrogeradora, permite a obtenção de informações físico-químicas relevantes ao aperfeiçoamento do sistema, e também de estudos de comportamento té
Publicado em: 2011
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3. Thermal stability and thermal decomposition of sucralose
Several papers have been described on the thermal stability of the sweetener, C12H19Cl3O8 (Sucralose). Nevertheless no study using thermoanalytical techniques was found in the literature. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC) and infrared spectroscopy, have been used to study the the
Eclética Química. Publicado em: 2009-12
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4. Study of antioxidant property of a thiosphorated compound derived from cashew nut shell liquid in hydrogenated naphthenics oils
The present work shows the aspects related to the synthesis and thermogravimetric analysis of thiophosphorated and phosphorated compounds from hydrogenated cardanol. Studies on thermal-oxidative stability were investigated, using a classical thermoanalytical-thermogravimetric method (TG/DTG) in an air atmosphere. Its use as an antioxidant additive in hydroge
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03
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5. Determination of moisture content and water activity in algae and fish by thermoanalytical techniques
The water content in seafoods is very important since it affects their sensorial quality, microbiological stability, physical characteristics and shelf life. In this study, thermoanalytical techniques were employed to develop a simple and accurate method to determine water content (moisture) by thermogravimetry (TG) and water activity from moisture content v
Química Nova. Publicado em: 2008
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6. Estudo termoanalitico e cinetico da combustão de oleo pesado / Thermoanalysis and reaction kinetics of heavy oil combustion
One of the main challenges in studies on In Situ Combustion resides in developing a kinetic reaction model to represent the dynamics of the numerous chemical reactions that occur at different temperature ranges. The objective of the present research is to develop a study on the oxidation behavior of a crude Brazilian oil and obtain kinetic parameters from th
Publicado em: 2008
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7. Thermoanalytical studies of the sweeteners acesulfame-K, aspartame, ciclamate, stevioside and sacharine / Estudos termoanalíticos dos edulcorantes acessulfame-K, aspartame, ciclamato, esteviosídeo e sacarina
In this work the thermal decomposition of the non-caloric sweeteners acesulfame-K, aspartame, sodium ciclamate, stevioside, saccharine and sodium saccharine was performed. Initially, the compounds were characterized usually elemental analysis and IR spectroscopy some were recrystallised from commercial samples, resulting in purified compounds. After characte
Publicado em: 2007
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8. Estudo termoanalítico e de compatibilidade fármaco-excipiente de rifampicina e alguns medicamentos utilizados na terapêutica da tuberculose / Thermoanalytical study and drug-excipient compatibility of rifampicin and some medicines utilized in tuberculosis terapeutics
This work was aimed at implementing the thermal analysis and other physico-chemical and analytical techniques in the development and quality control of drugs and medicines for the treatment of tuberculosis, especially rifampicin. The differential scanning calorimetry (DSC), thermogravimetry/derivative thermogravimetry(TG/DTG), elemental analysis, X-ray diffr
Publicado em: 2007
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9. Thermoanalytical and histological study of intra-articular papain-induced degradation and repair of rabbit cartilage. II. Mature animals.
The effect of papain treatment on the cartilage tissue of the knee joint of mature rabbits was studied by histological and thermoanalytical methods. Changes taking place in the composition of cartilage in the course of ageing were shown. As a result of papain treatment a significant irreversible destruction of the ground substance took place. Papain-induced
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10. Thermoanalytical and histological study of intra-articular papain-induced degradation and repair of rabbit cartilage. I. Immature animals.
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11. The crystal structure and physicochemical characteristics of 2-hydroxy-N-[3(5)-pyrazolyl]-1,4-naphthoquinone-4-imine, a new antitrypanosomal compound
This study was designed to investigate the physical characteristics and crystalline structure of 2-hydroxy-N-[3(5)-pyrazolyl]-1,4-naphthoquinone-4-imine (PNQ), a new active compound againstTrypanosoma cruzi, the causative agent of American trypanosomiasis. Methods used included differential scanning calorimetry, thermogravimetry, hot stage microscopy, polari
Springer-Verlag.