Chacras de Coria, Argentina
Chacras de Coria, Argentina
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Orrego M.J.E.,University of Padua | Defrancesco E.,University of Padua | Gennari A.,UNCUYO
Revista de la Facultad de Ciencias Agrarias | Year: 2012

The basic hedonic hypothesis is that goods are valued for their utility-bearing characteristics and not for the good itself. Each attribute can be evaluated by consumers when making a purchasing decision and an implicit price can be identified for each of them. Thus, the observed price of a certain good can be analyzed as the sum of the implicit prices paid for each quality attribute. Literature has reported hedonic models estimates in the case of wines, which are excellent examples of differentiated goods worldwide. The impact of different wine attributes (intrinsic or extrinsic) on consumers' willingness to pay has been analyzed with dissimilar results. Wines coming from New World producers seem to be appreciated for different attributes than wines produced in the Old World. Moreover, Old and New World consumers seem to value differently the wine's characteristics. To our knowledge, no cross country analysis has been done dealing with New World wines in Old World countries, leaving an important gap in understanding underlying attributes influencing buying decisions.

Maytenus boaria forest stands occurring on Mendoza mountains are deemed to be threatened relicts. A phytosociological survey of these stands was undertaken in ravines of Cordillera Frontal. Pure forest stands of maitén were observed on slopes, and mixed stands on terraces. Pure stands occurred above 1500 m elevation: 1) on shady and sunny slopes of narrow ravines, in cold environment, that belong to the vegetation belt of Mulguraea scoparia and Colliguaja integerrima; colder conditions on shady slopes are evidenced by the presence of Junellia juniperina, Bowlesia tropaeolifolia, Gutierrezia gilliesii, Mutisia subspinosa, Ephedra breana, Geranium berteroanum and Calceolaria pinifolia, and warmer conditions on sunny slopes by Schinus fasciculatus, Lycium chilense and Buddleja mendozensis; 2) on shady slopes in open mountain valleys, in cool environment, where Monte species occur: L. chilense, Baccharis salicifolia, Larrea nitida and Proustia cuneifolia; the last three, together with Eupatorium buniifolium, indicate water availability in slopes and terraces. Mixed forest stands of M. boaria and Ochetophila trinervis with Rosa rubiginosa, P. cuneifolia and E. buniifolium were surveyed on terraces below 1500 m elevation in cool environments. These are azonal forests that grow in small isolated stands on sites with high water availability.

The objectives of this work were: to evaluate the processes of concentration and drying of a polyphenolic grape seed extract (Vitis vinifera L.). The processes should be able to preserve the reducing power of the extract; to evaluate the efficiency of the antioxidant obtained by comparison with frequently used commercial antioxidants in a vegetable product susceptible to oxidation, such as apple juice. The single strength aqueous grape seed extract was concentrated at 60°C in a laboratory scale rotary evaporator under vacuum. The phenolic compounds concentration was determined using a modified Folin-Ciocalteu method. The antioxidant activity was evaluated measuring the reducing power by the method of Oyaizu. Apple juice oxidation was determined by the Özoglu method. The concentrated extract obtained was dehydrated by two methods: freeze-drying and foam-mat drying. At the same phenolic concentration, concentrated extracts exhibited greater antioxidant capacity than single strength extracts. Foam-mat dried extracts maintained the same antioxidant capacity than the concentrated extracts. Freeze dried extracts experienced a significant loss of antioxidant activity. The concentrated grape seed extract inhibited the oxidation of apple juice in 31.51%, ascorbic acid in 2.60% and sulfur dioxide in 97.40%.

It is posed the existent correlation between the techno-economic feasibility of the cherry tree cultivation and its location in different cultivation zones of Mendoza Province. The behavior of the cherry tree cultivation has been observed in a 15 years period in several zones of Mendoza Province analyzing the results from an ecological and economical approach. In order to do that, a simulation model has been elaborated covering the principal ecological variables and the economical results of harvesting costs and prices. The results stand out the contradiction between ecological and economical aptitudes. In traditional cultivation zones a better yield per hectare is obtained, but the net income is less than the one from the warmer and earlier zones from the East of Mendoza, planted recently with new varieties such as Marvin Brooks, New Star, Gardner, Celeste and other that achieve, as first fruits, higher prices in the market. The results of this publication give the producer advice about which places and varieties to choose for new cherry-tree cultivations.

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