1,721,039 research outputs found
Reactive oxygen species release, vitamin E, fatty acid and phytosterol contents of artificially aged radish(Raphanus sativus L.) seeds during germination
No full textAbstract Seeds of Raphanus sativus L. subjected to
accelerated ageing were investigated for reactive oxygen
species (ROS) release and for content of vitamin E
(tocopherol, TOC, and tocotrienol, TOC-3), fatty acids and
phytosterols in seed coats, cotyledons and embryonic axes
during germination. In unaged seeds, ROS release occurred
mainly in seed coats of non-imbibed seeds and in seedlings
(48 h of imbibition). TOC and TOC-3 were mainly represented
by the c-isoform, abundant in embryonic axes. Fatty
acids were mainly found in cotyledons. In seed coat and
embryonic axis, phytosterols consisted mainly of sitosterols.
The effects of ageing were mainly visible in embryonic
axes at 48 h of imbibition. Deterioration was associated
with a decrease in fresh weight increase percentage, germination
percentage, a-TOC and total fatty acid content.
An increase in ROS release from seed coats and in c-TOC,
d-TOC, c-TOC-3 content in embryonic axis was also
observed. The use of c-TOC and total fatty acids in
embryonic axis as parameters of seed quality evaluation
during storage was suggested.
Keywords Ageing Fatty acids Phytosterols
Raphanus sativus ROS release Vitamin
Hydrolysis of Methylthiazolopyridines. X-ray Crystal Structure of 3-Acetamido-2(1H)-pyridinethione
No full textHydrolysis of 2-methylthiazolo[5,4-b]pyridine resulted in ring opening of the thiazole and formation of 3-acetamido-2(1H)-pyridinethione whose X-ray crystal structure has been determined
Characterization of Brassica fruticulosa seeds
No full textThe structure and vitamin E (tocopherol and tocotrienol), fatty acid and phytosterol content and composition of seeds of Brassica fruticulosa Cyr. (Brassicaceae) were characterized. Seed size
and elevated content of γ- tocotrienol, and γ- tocopherol and low of α- tocopherol can be useful for distinguishing seeds of B. fruticolosa from those of Sicilian Brassica sect. Brassica. The concentration of the tocotrienol is about one third of the vitamin E content. This profile makes this wild species worth to be recovered as food source and its germplasm preserved in a gene
bank
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
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