1,720,981 research outputs found
The genus Cystolepiota (Agaricaceae, Basidiomycetes) in Israel
Full text linkThe genus Cystolepiota is new for Israel. In Israel it is represented by two species: Cystolepiota bucknallii and C. moelleri. Locations, dates of collections in Israel, general distribution, detailed macro- and micromorphological descriptions and illustrations are given
Chemical Composition, Antimicrobial Efficacy, and Sensory Characteristics of Kombucha Beverages from Lentinus edodes and Coriolus versiclolor Medicinal Mushrooms
No full textIn contemporary times, food products are increasingly expected to demonstrate
positive health effects on the human body, leading to heightened interest in their role in
disease prevention. Beverages consist of different ingredients dissolved in water and are
considered as good way to provide the human body with nutrients and bioactive compounds
[1]. Incorporating mushrooms into beverages offers a significant opportunity for both
mushroom and beverage producers to meet the growing demand for innovative, enjoyable
products that positively impact quality of life. Kombucha is a fermented tea beverage created
by the symbiotic activity of different types of yeasts and acetic acid bacteria. It is traditionally
produced with black tea; however, the possibility of producing this beverage has also been
tested using different fermentation media [2]. Despite the proven pharmacological
properties of various mushrooms and their biologically active compounds such as
polysaccharides, polypeptides, proteins, phenols, flavonoids, sterols and other, their
utilization in food systems remains limited. Therefore, two medicinal mushrooms were
chosen for the development of novel kombucha beverage production. The first, Lentinus
edodes a medicinal and edible mushroom, better known as shiitake mushroom, is the leading
cultivated edible mushroom in the world, because of its appealing aroma and medicinal
properties. The second, C. versicolor mushroom is not edible, but was chosen because its
application in traditional medicine was based on the preparation of tea from the fruiting
body, as well as hot water extracts [3].
Cultivation of mushrooms fruiting bodies was conducted on the substrates composed
from agricultural wastes. Produced fruiting bodies were further crushed and extracted with
hot water under pressure. After the addition of sucrose, fermentation with kombucha
culture was conducted. Kombucha beverages compositions were analyzed using ATR-FTIR
and spectroscopic analysis. Their antimicrobial potentials were tested by determining
minimal inhibitory and minimal bactericidal activity. Sensorial properties of novel bioactive
beverages were evaluation by a method that uses a hedonic scale with nine levels.Extraction of medicinal mushrooms in the preparation of the medium for
fermentation of kombucha culture proved as suitable from the nutritional aspect for
achieving adequate conditions and successfully obtaining fermented kombucha products.
ATR-FTIR analysis of the qualitative chemical composition kombucha beverages revealed that
the dominant polysaccharide fraction was present in the samples, as well as proteins, lipids,
phenolic compounds and primary alcohols. The analysis of the quantitative chemical
composition showed that there was a statistically significant difference in the content of total
polyphenols among the samples of kombucha beverages made from different mushrooms. It
was found that the antibacterial activity of kombucha mushroom beverages does not come
only from acetic acid, but also from components extracted from the mushrooms or formed
during the fermentation process. Kombucha made from L. edodes mushroom received the
best rating based on sensorial properties. The aromatization of the samples with the aroma
of coconut contributed to achieving better results with the kombucha sample from C.
versicolor mushrooms.
This research demonstrated the great potential of medicinal mushrooms for
developing innovative, health-promoting beverages in the food industry.The 12th International Medicinal Mushrooms Conference (IMMC12), September 24−27, 2024, Bari, Ital
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
Species diversity and biology of fungal life in the extremely hypersaline water of the Dead Sea
No full text
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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