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ISSN 打印: 1521-9437

ISSN 在线: 1940-4344

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00066 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.34 SJR: 0.274 SNIP: 0.41 CiteScore™:: 2.8 H-Index: 37

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Selenium Enrichment of Grifola frondosa (Dicks.:Fr.) S.F.Gray (Maitake) Mushrooms

卷 7, 册 3, 2005, 340 pages
DOI: 10.1615/IntJMedMushrooms.v7.i3.51
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摘要

Grifola frondosa (Dicks.:Fr.) S.F.Gray (Maitake) is a popular culinary mushroom that is well known to contain unique β-glucans, which have potent immune-modulating and antitumor properties. However, they generally contain low levels of important micronutrient minerals, such as selenium. Selenium has recently generated great interest in nutritional and medical research, because it serves as a cofactor for the enzyme glutathione peroxidase, which is involved in quenching free radicals. Thus, the objective of this study was to determine if G. frondosa can be enriched with selenium by addition of sodium selenite to the growth substance, as was done previously with Agaricus bisporus (J. Lge) Imbach. Two separate crops were grown using a sawdust-based synthetic medium with various levels of selenium added by addition of appropriate amounts of sodium selenite prior to pasteurization and inoculation. Basidiomes were harvested from the treated substrates, weighed for yield determination, freeze-dried for solids determination, and than analyzed for selenium content using graphite-furnace atomic absorption spectrophotometry. Yield was not significantly affected by addition of selenium to the substrate, but basidiomes were harvested 5—7 days earlier when selenium was added. No selenium (<0.5 μg/g) was detected in the untreated (control) substrate and the basidiomes harvested from it. Selenium increased in the basidiomes in direct response to levels added to the substrate. Treated substrates contained 0.6, 2.4, and 7.2 μg/g (d.w.) selenium and basidiomes harvested from them contained 0.6, 2.2, and 9.3 μg/g (d.w.), respectively. These results indicate that G. frondosa can be predictably enriched with selenium in a manner similar to Agaricus bisporus to become an excellent nutritional source of selenium. Also, production of Maitake extracts or powders for nutraceutical or medicinal purpose that can contain significant levels of selenium in addition to β-glucans would be possible.

对本文的引用
  1. Grodzynska G.A., Samchuk A.I., Nebesny V.B., Enrichment of Edible Mushroom Biomass with Compounds of Germanium, Selenium, and Molybdenum, Science and innovation, 15, 5, 2019. Crossref

  2. Grodzynska G.A., Samchuk A.I., Nebesny V.B., Enrichment of Edible Mushroom Biomass with Compounds of Germanium, Selenium, and Molybdenum, Nauka ta innovacii, 15, 5, 2019. Crossref

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