1,720,974 research outputs found
Effect of mild vacuum packaging on cut Matthiola incana L. flowers vase life
Full text linkMild vacuum (MV) packaging was compared with conventional cold wet storage on cut stock (Matthiola incana L.). The cut stock flowers were selected and cut to 50 cm and stored in water (wet storage) or placed in plastic bags under MV at 4 °C for six days. The effect of storage was compared with non-stored cut flowers. The postharvest quality of cut flowers was evaluated by monitoring vase life, water uptake, alcohol dehydrogenase activity (ADH), ethylene production, total chlorophyll and SPAD measurements. The MV packaging allowed storing the stock flowers for three days, without any visible injury and with a vase life of about 7 – 8 days. MV storage caused an accumulation of ethylene and CO2 in bags, 919.9 pl ml-1 and 21382 μl l-1, respectively. Only flowers stored for 6 days in mild vacuum showed quality reduction. The leaves appeared dehydrated; with local transparencies of cuticles and a green-gray colour. The ADH was higher in open flowers (2.9 nmol mg-1 protein min-1) compared with other organs in MV storage method, and the highest concentration was recorded after 6 days storage. At the end of vase life stock flowers wet stored showed a greater production of ethylene (0.75 nl h-1 g-1 FW) then MV (0.3 nl h-1 g-1 FW). The MV system can be used in M. incana if storage or transportation is limited to three days
Towards a formal model of autonomic services based on SelfLets
No full textAutonomic services are suitable building blocks for highly dynamic applications that must adapt to changing environments, contexts, requirements. When these applications combine a high level of dynamism with dependability requirements (e.g., healthcare systems), the components on which they are built must be precisely designed and their properties must be well understood. Modeling these components in a formal way can help in this regard. In this paper we present the nucleus of a formal model of the concept of SelfLet, which is the building block of an autonomic infrastructure that is being developed in our research group. The formal model includes the core elements that are related to service invocation and execution; it constitutes a solid foundation facilitating and predisposed for the addition of the concepts that have yet to be formalized
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
Effect of storage temperature and duration on vase life of cut Ruscus racemosus L. foliage
No full textCut foliages are important fillers in ornamental compositions. Usually, the vase life is already long enough to satisfy the consumers’ needs. However, some cooperatives and commercialization companies would extend as much as possible the storage for covering the periods of production lack. The aim of this work was to evaluate the potential storage ability of cut Ruscus racemosus foliages, selected following the commercial requirements. The cut foliages were stored at 4 or 10°C in vase containing distilled water. After 14, 21 and 28 days of storage, the cut foliages were transferred to 20°C in controlled environment for vase life evaluation. Immediately after storage, the chlorophyll a fluorescence and sugar (reducing sugars and sucrose) contents were measured. The vase life of cut Ruscus evaluated immediately after harvest was 34 days. After 14 days the vase life of cut foliage was reduced to 27-28 days without differences between 4 and 10°C. The effect of temperature became visible after 21 days of storage. The cut foliage stored at 10°C showed a vase life of 23 days while those stored at 4°C showed a slightly reduced vase life, compared with control. After 28 days of storage, the vase life of cut foliage was strongly reduced, 22 and 13 days respectively at 4 or 10°C, but still acceptable for ornamental use. During storage, the chlorophyll a fluorescence parameter that was able to show the senescence and reduction of quality was the dissipation of energy per cross section DIo/CS in cut foliage stored at 10°C. Sucrose significantly declined only in cut foliage stored at 10°C
Echinacea Angustifolia D.C.: micropropagazione e colture cellulari per la produzione di metaboliti secondari
No full textVariations 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
Mild Vacuum Packaging for Long Storage of cut Danae racemosa (L.) Moench Foliage
No full textCut foliage is used as fillers to improve the appearance of bouquets or floral decorations. The growing season in Italy is comprised from September to May. Therefore, there is a period of product unavailability. The commercial cooperatives and floral industries are very interested to extend as much as possible the period of storage. The aim of this work was to evaluate the use of mild vacuum as potential storage system for cut Danae racemosa foliage. The cut foliages were stored at 4°C in distilled water as control and in plastic bags with reduced atmosphere using vacuum packing machines (vacuum ranged from 0.1 to 0.5 MPa). After 30, 45 and 60 days of storage, the cut foliages were transferred to 20°C in controlled environment for vase life evaluation. Immediately after storage, the chlorophyll a fluorescence and sugar (reducing sugars and sucrose) contents were measured. The vase life of cut foliage evaluated immediately after harvest was 35 days. After 30 days of storage the vase life was 30 days in the control and 28 days in mild vacuum stored foliage. After 45 days the vase life declined and was in average 21 days in both storage treatments. After 60 days of storage, the vase life in control was 15 days and in mild vacuum treatment was 10 days. The results of chlorophyll a fluorescence showed that the cut foliage were more stressed in mild vacuum than in control and that probably explains the reduction of vase life. The reducing sugars were not affected by the storage treatments, while sucrose content was higher in mild vacuum stored foliage especially when stored for 45 and 60 days
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