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Oleogel: definition, possible applications and further developments Webinar, 20th October 2021
No full textOleogelation is defined as the process able to convert a liquid oil into an anhydrous, viscoelastic self-standing material called oleogel [1]. In recent years, this topic has attracted an increasing interest and the research in this area is progressively growing. Different food applications have been proposed for oleo-gels. The most promising one is their use as fat substitute to obtain healthier foods with reduced content of sat/trans fatty acids. Currently, the fat substitution is highly demanded due to the health issues associ-ated with the consumption of lipids rich in saturated/trans fatty acids, such as animal fats (e.g. butter and lard), tropical oils (e.g. palm oil, palm kernel oil and coconut oil), margarine and shortenings containing them. As extensively demonstrated, their excessive intake is closely related to the increase of the risk of incidence of many non-communicable diseases (e.g., coronary heart disease, Type II diabetes, obesity, stroke, metabolic syndrome and other cholesterol maladies) [2]. To complicate this matter, concerns over sustainability severely limit the use of some fats. This is the case of palm oil and other tropical oils, whose increased production has led to deforestation throughout the world’s tropical regions with consequent environmental issues [3]. Oleogels and oleogelation methodologies were the topics of the webinar organized by the Società Italiana per lo Studio delle Sostanze Grasse (SISSG) on the 20th of October 2021. The contents of the webinar are here briefly summarized
Role of the polyphenol content on the structuring behavior of liposoluble gelators in extra virgin olive oil
Get PDFThe role of polyphenols in affecting the structural and rheological properties of oleogels was investigated.
Polyphenols were selectively removed from extra virgin olive oil (EVOO), and the resulting oils at three different
polyphenol levels were gelled by using 10% (w/w) of monoglycerides (MG), rice wax (RW), sunflower wax (SW),
and a mixture of β-sitosterol/γ-oryzanol (PS). The structural characteristics of oleogels were assessed by visual
appearance, rheology, polarized light microscopy, calorimetry, XRD, and FTIR. Polyphenol content differently
affected oleogel characteristics depending on network features. While EVOO-polyphenols did not influence PSand
SW-based oleogels, they reinforced MG- and RW-based oleogel network. As polyphenol content increased,
the critical stress and melting temperature also increased, concomitantly with changes in crystal morphology.
This was attributed to the capacity of polyphenols to form additional junction points in the crystalline network
Unraveling the role of probiotics in affecting the structure of monoglyceride gelled emulsions: A low-field 1H NMR study
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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 moderate hydrostatic pressure on crystallization of palm kernel stearin-sunflower oil model systems
No full textVariations on the Author
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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