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The main ways by which extra-virgin olive oil is consumed include direct application on salads or as an ingredient in sauces, but it is also been used by some for cooking, including frying and baking. However, it has been reported that under heat stress, some nonglyceridic components of olive oil are degraded. So, the effect of heating (at 50, 100, 150, and 200 °C for 2 h) on the volatile composition and sensory aspects of extra-virgin olive oil were evaluated. Heating altered the volatile composition of extra-virgin olive oil, mainly at higher temperatures (above 150 °C). The main modifications were related to the formation of large amounts of oxidized compounds, particularly large chain aldehydes. Sensory aspects were also altered when the oil was heated to higher temperatures, which might have occurred because of color alterations and mainly changes in the volatile composition of the oil.Index terms: Vegetable oil, sensory analysis, chemical composition. RESUMOOs principais meios de consumo do azeite de oliva extravirgem incluem a aplicação direta em saladas ou como ingrediente em molhos, mas ele também tem sido usado para cozinhar, seja em frituras ou cozimentos. No entanto, sob estresse térmico, alguns componentes não-glicerídicos do azeite podem ser degradados. Assim, o efeito do aquecimento (a 50, 100, 150 e 200 °C por 2 h) sobre os componentes voláteis e aspectos sensoriais do azeite de oliva extravirgem foram avaliados. Os resultados indicaram que o aquecimento alterou a composição volátil do azeite extra virgem, principalmente em temperaturas mais elevadas (acima de 150 °C). As principais modificações foram relacionadas à formação de compostos oxidados, sobretudo aldeídos de cadeia longa. Os aspectos sensoriais também sofreram alterações quando o azeite foi aquecido a temperaturas elevadas (acima de 150 °C), o que pode ter sido influenciado por alterações de cor e pelas da composição volátil do produto.Termos para indexação: Óleo vegetal, análise sensorial, composição química.

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The aim of this study was to use marolo pulp in the confection of traditional (sucrose) and diet/light (sodium cyclamate/saccharine (2:1)) yoghurts, with variation in the concentrations of the pulp and sweeteners. The ripe fruit was harvested in Machado-MG and handled at UNIFAL-MG. Six testformulations were made, resulting from the factorial combination of 3 levels of natural and artificial sweetener (1.4% and 1.9% of sodium cyclamate/saccharine and 14,4% sucrose) with 2 levels of pulp (20% and 30%). The acceptance test was performed using the hedonic scale (9 points) with 30 panelists. Every acceptance grade remained between 6 and 8. The interaction sweetener*pulp was significant, therefore, analised. For the formulations with 20% pulp, the use of sucrose was more accepted, with average grade 0.68 point higher than the formulations containing artificial sweetener. Among the sweeteners, the dose containing 1.4% got significantly higher scores than the doses with 1.9%. The formulations with 30% pulp, didn't present significant difference among the different types of sweeteners. For the use of 1.9% artificial sweetener the concentration of 30% pulp was most accepted. In the internal preference mapping, there isn't difference in acceptation of formulations with 1.4% sodium cyclamate/saccharine with 20% and 30% of pulp and sucrose with 20% and 30% of pulp. There was superiority in the acceptability of the formulations with sucrose in relation to the artificial sweetener, and also, when comparing the 1.4% to the 1.9% artificial sweetener concentrations. It is concluded that yoghurt may be well accepted, mainly when sweetened with sucrose. keywords: Marolo; yoghurt; acceptability; internal preference mapping.