1,720,996 research outputs found
Proposte di caratterizzazione farmacognostica di risorse vegetali della foresta amazzonica orientale ecuadoriana
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Chemical and biological diversity of Bergamot (Citrus bergamia) in relation to environmental factors
No full textOil of bergamot is receiving renewed popularity in aromatherapy. The biovariability of Citrus bergamia grown wild in Calabria (Italy) was investigated as far as chemical markers (linalool, linalyl acetate and bergapten) content and antioxidant and antifungal activities of the methanolic extracts. The average content in the markers presents slight variations with the altitude and more evident changes with the latitude of the areas of plant collection
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
Chemical and biological diversity of bergamot (Citrus bergamia) in relation to environmental factors
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Comparative evaluation of 11 essential oils of different origin as functional antioxidants, antiradicals and antimicrobials in foods
No full textEleven essential oils, namely, Cananga odorata(Annonaceae), Cupressus sempervirens (Cupressaceae), Curcuma Longa (Zingiberaceae), Cymbopogon citratus (Poaceae), Eucalyptus globulus (Myrtaceae), Pinus radiata (Pinaceae), Piper crassinervium (Piperaceae), Psidium guayava(Myrtaceae), Rosmarinus officinalis(Lamiaceae), Thymus x citriodorus (Lamiaceae) and Zingiber officinale (Zingiberaceae), were characterized by means of GC and GC–MS and evaluated for their food functional ingredient related properties. These properties were compared to those of Thymus vulgaris essential oil, used as a reference ingredient. Antioxidant and radical-scavenging properties were tested by means of 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay, b-carotene bleaching test and luminol photochemiluminescence (PCL) assay. In the DPPH assay, C. odorata, C. citratus, R. officinalisand C. longa showed major effectiveness, with a radical inhibition ranging from 59.6 ± 0.42–64.3 ± 0.45%. In the b-carotene bleaching test, C. odorata
(75.5 ± 0.53%), R. officinalis (81.1 ± 0.57%) and C. longa (72.4 ± 0.51%) gave the best inhibition results. Similar results were
obtained for the same essential oils in the PCL assay. Antimicrobial properties were obtained on five food-spoilage yeasts: Candida albicans ATCC 48274, Rhodotorula glutinis ATCC 16740, Schizosaccharomyces pomb e ATCC 60232, Saccharomyces cerevisiae ATCC 2365, Yarrowia lypoliticaATCC 16617 . C. citratus and T. x citriodorus were the most effective against the tested strains. Suggestions on relationships between chemical composition and biological activities are outlined
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