Browsing by Author "Bordeu, E"

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    Comparison between odour and aroma profiles of Chilean Pisco spirit
    (ELSEVIER SCI LTD, 2005) Lillo, MPY; Latrille, E; Casaubon, G; Agosin, E; Bordeu, E; Martin, N
    Precise sensory measurements of odour (orthonasal) and aroma (retronasal olfactory perception) are time and resource consuming. The aim of this work was to develop improved olfactory tasting procedures. Odour and aroma profiles of 13 Pisco spirits and 14 distillation fractions were obtained through descriptive analysis by a panel of 12 trained subjects. The samples were discriminated by 12 odour and 11 aroma attributes out of 13, with odour being slightly more discriminant at a panel and individual level. Samples were differentiated according to the type of distillation fraction and maturation process. None of the tasting modes induced significantly higher intensity judgement, with the exception of linalol whose average sample odour intensity was higher. However, there were differences in intensity scores between modes due to subject-mode interactions for all attributes except linalol and, to a lesser extent, to product-mode interactions for tails, ethyl acetate and linalol. Partial least square (PLS) models gave a good prediction of aroma from odour scores, except for oak attribute which exhibited a non-linear behaviour. Overall, Pisco olfactory perception can be limited to odour assessment. (C) 2004 Elsevier Ltd. All rights reserved.
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    Influence of sun exposure on the aromatic composition of Chilean Muscat grape cultivars Moscatel de Alejandria and Moscatel rosada
    (AMER SOC ENOLOGY VITICULTURE, 1997) Belancic, A; Agosin, E; Ibacache, A; Bordeu, E; Baumes, R; Razungles, A; Bayonove, C
    The effect of sun exposure on the aromatic composition of two Muscat grape cultivars, Moscatel de Alejandria and Moscatel rosada, was monitored over two seasons. Fully exposed and artificially shaded clusters permitting 20% (shaded) and 50% (semi-shaded) sun exposure were used to assess the impact of shading in fruit aroma composition. Both cultivars contained similar levels of total free terpenols (2100 mu g/L), although Moscatel de Alejandria was richer in total bound terpenols. The highest concentration of free terpenols was obtained from the semi-shaded treatment, although for Moscatel de Alejandria, the resulting difference between exposed and semi-shaded treated grapes was negligible. Shaded grapes had the lowest concentration of terpenols, with poor Muscat typicity. The content of one of the most important terpenols from the aromatic perspective, linalool, appeared to be the most sensitive to sun exposure. Berry temperature appeared to be critical for maximizing monoterpene levels and muscat flavor in the fruit.
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    Proposal for a standardized set of sensory terms for pisco, a young muscat wine distillate
    (AMER SOC ENOLOGY VITICULTURE, 2004) Bordeu, E; Formas, G; Agosin, E
    The predominantly muscat aroma of pisco, a young distillate produced in northern Chile and Peru, distinguishes it from other young spirits. Standardized terminology is necessary, however, to describe differences among the wide range of piscos. This is the first proposal for a standardized set of descriptive terminology for this type of product. A panel of trained specialists established the proposed terminology, which is displayed in a wheel format and in a list of corresponding standards.