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    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

    MICROBIOLOGICAL CONSIDERATIONS ON VEGETABLES 0F VARIOUS ORIGINS.

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    The Authors wanted to value the hygienic conditions of homegrown vegetables and vegetables grown for the market; they also wanted to establish if there was a relationship between fungi presence and faecal contamination level. The study was carried out on 100 samples of vegetables usually eaten raw; 70% of the latter was positive for the presence of fungi, 48% for the presence of FC and 8% for FS. Amongst the fungi, the most commonly isolated strains were Saccharomyces cerevisiae (21%) and Candida parapsilosis (11%). The conclusions drawn were that vegetables eaten raw were a real vehicle of pathogenic micro-organisms, or potentially so, mainly spread by the oral and faecal routes
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