1,721,244 research outputs found
Effect of 1-methylcyclopropene on cactus pear fruit at different maturity stages during storage
No full text1-Methylcyclopropene (1-MCP) is an ethylene antagonist widely used to retain quality and prolong the postharvest storage period of various climacteric fruits. To date, there is little information about the effects of 1-MCP on postharvest storage performance of cactus pear fruits. Recently, data revealed that exposure of 1-MCP at 1000 ppb had several beneficial effects in preserving postharvest quality of cactus pear fruits, as indicated by inhibition of peel color change. In this paper, we investigated the effect of 1-MCP on quality of cactus pear fruit harvested from the scozzolatura crop at early and late ripeness stages. Fruit was tested at two different ripening stages: “commercial ripe” (CR; fruit commercially ripe with 90% green ground-color and 10% orange color) and “ripe on tree” (ROT; late fruit ripe on tree with 100% orange color and no green ground-color). Fruit was sanitized by immersion in 200 mg kg-1 sodium hypochlorite for 5 min, and stored at 8°C for 30 days. Color (L* and ΔΕ), visual appearance, crunchiness score, carotenoids, phenolic content and respiration rate were measured at harvest and after 7, 14, 21 and 30 days. The results did not show beneficial effects of 1-MCP in terms of color or visual or crunchiness score; in contrast, significant differences occurred in all samples in terms of carotenoid and polyphenol content
The effect of passive atmosphere on quality of 'Dottato' breba fig stored at low temperature
No full text'Dottato' is the most representative fig (Ficus carica L.) Italian cultivar. Consumers prefer fresh figs at tree ripe maturity stage and fig fruit do no stand more than 3 days, even at low temperatures. To reduce their respiration rate and increase their postharvest life, the effectiveness of low temperature storage was studied on 'Dottato' fig fruit either placed in rigid bi-oriented polystyrene bags or left in open bags, and stored for 3, 5, 7, 10 and 14 days at 4°C and 90% RH. Appearance score, respiration rate, soluble solids, were measured at each sampling date. Fig fruit control in air, showed excellent quality performances still after 7 days of storages, while fruit held, in passive modified atmosphere, showed substantial decay after 3 days of storage
Time estimation in Alzheimer and the role of the central executive
No full textThe aim of this study was to evaluate the role of short-term memory and attention in time estimation. For this purpose we studied prospective time verbal estimation in 21 patients with Alzheimer's disease (AD), and compared their performance with that of 21 matched normal controls in two different conditions: during a digit span task and during an attentional task. Results showed that the performance of AD patients was significantly worse than that of the controls; the interaction between group and condition was significant. We suggest a role of attentional-executive functions in prospective time estimation
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
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