1,721,083 research outputs found
Ultra High Pressure Homogenization applied within the Made in-Italy project “ATENA”
No full textDuring the last decades, industrial and research partners have worked together, developing several patents, for the advance of new HPH equipments able to reach pressures up 400 MPa and more, offering the chance to use this technology as alternative thermal treatment. In this framework, the present research is intended to present some results obtained within the project ATENA, whose overall objective was to exploit new technologies for the production of a new generation of products based on the Mediterranean diet, characterized by high nutritional values, safety and improved shelf-lif
Use of Yarrowia lipolytica to Obtain Fish Waste Functional Hydrolysates Rich in Flavoring Compounds
Full text linkFishery processing industries generate large amounts of by-products. These by-products come from fish heads, skin, bones, thorns, and viscera. The disposal of these wastes represents an increasing environmental and health problem. Nowadays, there is a growing interest in how to utilize fish materials that are not used for human consumption. Among the different solutions proposed, the use of proteolytic and lipolytic microorganisms represents a green solution for waste valorization. In this work, first we screened several conventional and non-conventional microorganisms for their proteolytic and lipolytic functions. Then, the most promising strains (Yarrowia lipolytica YL2, Y. lipolytica YL4, Bacillus amyloliquefaciens B5M and B. subtilis B5C) were tested on a fish waste-based solution. After 72 h incubation at room temperature, the supernatants obtained using the strains of Y. lipolytica showed the highest degree of hydrolysis (10.03 and 11.80%, respectively, for YL2 and YL4), the strongest antioxidant activity (86.4% in DPPH assay for YL2) and the highest formation of aldehydes (above 50% of the total volatile compounds detected). Hydrolysates of fish waste obtained with Y. lipolytica may be reused in feed and food formulations for their functional and flavoring characteristics
Saccharomyces Eubayanus potential in winemaking field
No full textThe literature data have pointed out the growing interest for the species Saccharomyces eubayanus, a recently described taxon, isolated from natural environments in Patagonia and discovered to be the unknown part, together with S. cerevisiae, of S. pastorianus, an alloploid hybrid used for lager beer production. Although up to now, S. eubaynus was associated with Nothofagus trees and some traditional fermented beverage in Patagonia, it is believed to have a great potential also in oenological sector.
For this, principal aim of this research was to investigate the potential of S. eubayanus CBS 12357 for fermenting Chardonnay musts at 10, 16 and 26°C. Its technological potential was compared to that of S. cerevisiae VIN13, a commercial strain typically used for this purpose. For both the strains, the fermentation kinetics and the yeast cell loads, in relation to the adopted temperature, were monitored. The obtained wines were also characterized for oenological parameters and the volatile molecule profiles by GC/MS/SPME. Moreover, also panel tests were performed. The data obtained pointed out the great cryotolerant aptitude of S. eubayanus which resulted, at 10 and 16°C, in faster fermentations with respect to S. cerevisiae VIN 13. Also, S. eubayanus gave rise to wines characterized by specific volatile molecule fingerprintings. According to the panel test performed, the wine obtained by S. eubayanus resulted not statistically different from those from S. cerevisiae but they were characterized by “body” and aroma persistence, highlighting the S. eubayanus potential in winemaking
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
Modeling with the Logistic Regression of the Growth/No Growth Interface of Saccharomyces cerevisiae in Relation to 2 Antimicrobial Terpenes (Citral and Linalool), pH, and aw
No full textThe antimicrobial effects of 2 terpenes (citral and linalool) on a Saccharomyces cerevisiae strain isolated from
spoiled soft drink have been evaluated, alone or in combination, in relation to pH and aw using in vitro assays. The obtained
data were fitted with the logit model to find the growth/no growth boundary regions of the 2 terpenes, focusing the
attention on the type of interaction exerted by citral and linalool. In particular, the results showed an increase of citral
antimicrobial effect in growth media characterized by low aw value, as well as a higher linalool antimicrobial effect in
media at low pH. Moreover, the interactive effects of the 2 terpenes were exploited. The results obtained with the model
were validated in an independent experiment. The knowledge of the interactions of essential oil molecules with enhanced
antimicrobial activity, in relation to some of the most important chemicophysical variables, can have important industrial
applications, since these substances are able to assure the desired antimicrobial effect without negatively modifying the
product flavor profile
- …
