1,720,977 research outputs found
Phenology and Fruit Growth Dynamics of Mango (Mangifera indica L.) in Greenhouse and Open Air in Mediterranean Climate
Full text linkPhenological evolution of shoots and fruit growth of three mango varieties—Keitt, Osteen and Tommy Atkins—were monitored during two reproductive seasons, from full flowering to fruit harvest on trees cultivated in the open air and inside a greenhouse, in the island of Sicily—Italy. The aim of the study was to assess the behavior of mango trees subjected to summer high temperatures under a permanent plastic cover in the Mediterranean climate. Differences between open air and greenhouse emerged in the dates of first record of major phenological stages and in their duration, and in the fruit growth rates. Greenhouse cultivated trees showed a significant anticipation of flowering and ripening of the fruits respect to open air trees, with harvest conducted earlier during the season. On the other hand, open air cultivated trees achieved fruit maturity in a shorter time compared to the greenhouse, with fruits needing between 90 and 110 days after full flowering to reach their final dimensions—while the trees in the greenhouse needed at least 125 days. The study allowed to understand the growth dynamics of mango fruits subjected to extreme high temperatures and provides new information to evaluate the opportunity of greenhouse cultivation of mango in the Mediterranean climate
Fruit production and quality evaluation of four litchi cultivars (Litchi chinensis Sonn.) grown in Mediterranean climate
Full text linkIntroduction - The agronomic and qualitative responses of the litchi fruit (Litchi chinensis Sonn.) grown in Mediterranean climate are not yet studied. In this study, yield components, physico-chemical and sensory traits of four commercial litchi cultivars were recorded over two productive seasons. Materials and methods - Fruits of the cvs Tai So, Wai Chee, Brewster and Kwai Mai were collected at commercial maturity stage and subjected to productive (yield, efficiency, number of fruits, crop load), analytical (fruit weight, transversal diameter, longitudinal diameter, moisture, total soluble solid content (TSS), titratable acidity (TA), TSS/TA ratio, seed weight, peel weight, percentage of flesh and fiber, ash, fat, protein contents, K, Na, Ca, Mg, P, Fe, Cu, Mn and Zn contents, vitamin B1, B2, B3and C contents), and sensory evaluations. Results and discussion - Even if the climatic conditions prevailing in Sicily differ from those of most litchi-growing regions, the four observed cultivars generally showed yields and fruit qualitative characteristics in line with the affirmed cultivar harvested in many tropical areas. 'Tai So' in addition to its reasonable yielding, physicochemical traits, contents of protein and vitamin, had the highest sensory appeal. 'Kwai Mai' showed interesting percentage of flesh, TSS/TA and flesh mineral composition. 'Brewster' and 'Wai Chee' revealed interesting ground colour, vit. B2and vit. C contents. On the other hand, 'Brewster' and 'Tai So' presented alternate bearing causing to lose a market year. Conclusion - These results suggest the possibility to produce litchi in Mediterranean climate with promising yields and an elevated standard of fruit quality
Effect of harvest date on mango (Mangifera indica l. cultivar osteen) fruit’s qualitative development, shelf life and consumer acceptance
Full text linkThe qualitative characteristics of mango fruits change throughout their development process and are also influenced by their duration. Harvesting at different times after the fruit set affects external and internal quality and the post-harvest behavior and management possibilities of the fruits. The objective of this study was to assess the evolution of the most important physicochemical and organoleptic parameters of cv. Osteen fruits concern the length of their stay on the plant and also to their post-harvest management. For this reason, fruits were harvested progressively in ten pickings. The study showed that mango fruits that are kept on the tree reach the best quality traits, corresponding to their physiological maturation. The length of the storage period needed to reach the consumption point varies greatly according to the harvesting moment and to the different environmental parameters, which also affect the organoleptic and physicochemical quality of the fruits. The number of days after full flowering were confirmed to be the primary information to consider when planning harvest with commercial use of the fruit, but interesting indications can be acquired through the definition of non-destructive (hardness, color) or destructive (dry matter) parameters. The data collected help improve mango fruit′ s post-harvest management practices, to provide a product with constant quality and homogeneity to the consumer
Chemical-physical and nutritional characteristics of mature-green and mature-ripe 'Kensington Pride' mango fruit cultivated in Mediterranean area during cold storage
Full text linkIntroduction - Mango is a very short postharvest life climacteric fruit. Mangoes are usually harvested firm and green because they are often assigned to long transportation before reaching the market, or they are collected after color break for local markets. In both cases, temperature control is the most critical factor in fruit ripening management. The aim of this study was to investigate the quality evolution of mature-green and mature-ripe mango fruit submitted to 8°C and 90 ± 5% of relative humidity to assess the possibility to prolong its postharvest life. Materials and methods - The fruit of mango (Mangifera indica L. cv. Kensington Pride) grown in a Mediterranean environment was submitted to the determination of fresh weight, color index, cover color percentage, flesh firmness, total soluble solid content (TSS), titratable acidity (TA), total TSS/TA ratio, ash, fats, crude fibers, carbohydrates, mineral composition (K, P, Ca, Na, Mg, Fe, Zn, Mn, Cu), ascorbic acid, vitamin A, niacin, riboflavin, thiamine and sensory analysis during cold storage. Results and discussion - A significant effect of storage was observed for weight loss, color, flesh firmness, total soluble solid, titratable acidity, ash, fat, crude fiber, carbohydrates, mineral composition and vitamins. Conclusion - A cold storage (8°C) prolongs the life of mango produced in Mediterranean climate, maintaining a good level of physico-chemical and sensory quality of the fruit
Instrumental and sensory evaluation of seven apple (Malus domestica borkh.) cultivars under organic cultivation in Sicily
Full text linkIn this trial we examined the quality of 7 clones belonging to more diffused apple polyclonal varietal groups, using chemical/physical and sensory analyses during two consecutive years. Galaxy, and their ameliorative clones Gala Annaglò® and Dalitoga (Gala clones) that ripen in summer, Erovan* Early Red One® and Scarlet Spur*-Evasni® (Red Delicious clone), Corail Pinova and its ameliorative clone RoHo 3615 * Evelina® that ripen in autumn were studied. Gala Annaglò® is interesting for the fruit size and peel color, Dalitoga for the early ripening and Galaxy for the crunchiness and consistency. All the Gala clones reached very high total solid soluble content confirmed by the panel judgment of the sweetness and acidity descriptors. The Red Delicious clones confirm the larger size and the high colorimetric standard of all covered red fruits; the new clone Scarlet Spur*-Evasni® reached an interesting fruit size and peel colour intensity and uniformity, and the best total solid soluble content to total acidity ratio confirmed by the sensory descriptors of acidity and sweetness. Moreover, it reached very high values of crunchiness, consistency and interesting values of apple flavour, honey flavour and fruit flavour. The ameliorative clone RoHo 3615*Evelina® was characterized by well uniform and intense coloured fruits and a more balanced total solid soluble content to total acidity ratio, and interesting values of crunchiness, consistency, apple flavour, honey flavour and fruit flavour. This study confirms the relationship between instrumental and sensory analysis
Distribution, ecology and conservation survey on the Celtis tournefortii subsp. aetnensis (Celtidaceae-Cannabaceae) populations in Sicily
No full textResults of research on the Celtis tournefortii subsp. aetnensis (Celtidaceae-Cannabaceae) populations in Sicily, based on the monitoring of the various nuclei distributed in the territory, are presented. In particular, two new important unpublished stations located in the southern part of the Sicani Mountains, widespread over an area of approximately 75 hectares, are reported. It is highlighted that the species, besides the lava flows of the western slope of Mount Etna (Catania
province), is tied to conoids present in five other disjointed sub-ranges, often with fragmentary and relictual stations: (1) Nebrodi Mountains inland (Cesarò territory, Messina province); (2) Madonie Mountains inland (Gangi territory, Palermo province); (3) northwestern sector, in the Palermo province (Rocca Busambra); (4) southwestern Sicani Mountains (Pizzo
Telegrafo, in Contrada S. Biagio and in the Caltabellotta territory, Agrigento province); (5) southeastern Sicani Mountains (S. Stefano di Quisquina at Pizzo Castelluzzo, Agrigento province). In addition to a herbarium exsiccata census, the survey led to a biological and autoecological characterization, to the definition of the current distribution, to an estimate of the number of individuals and to an analysis of its conservation status. The risk status was also assessed and the species was ascribed to the category Endangered (EN), in accordance with the B1ab(iii) and B2ab(iii) IUCN criteria
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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