1,721,013 research outputs found
Pre-emption of the substratum and the maintenance of spatial pattern on a rocky shore in the northwest Mediterranean
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Interaction between drought and elevated CO2 in the response of alfaalfa plants to oxidatiuve stress
No full textEntomofauna tafonomica del Cardinale Giulio della Rovere, arcivescovo di Ravenna (1533-1578)
No full textInsect remains associated with the mummy of Cardinal Giulio della Rovere, Archbishop of Ravenna (1533-1578)
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Taphonomic entomofauna associated with Cardinal Giulio della Rovere, Archbishop of Ravenna (1533-1578)
No full textActivated oxygen production and detoxification in wheat plants subjected to a water deficit programme
No full textWheat plants (Triticum durum L. cv. Ofanto) were grown in a controlled environment. In one set, control plants were regularly watered; the other set of plants was subjected to two water deficit periods obtained by withhoding water and rewatering to field capacity at the end of the frst period. After both periods of stress, water potential, pressure potential and relative water content (RWC) decreased; osmotic potential decreased by 0.3 MPa only after the second period of stress. In both treatments no osmoregulation mechanism occurred, however, an elastic adjustment took place and turgor was maintained at positive levels. Following the first treatment the good functionality of the ascorbate/gltathione cycle allowed the plants to maintain hydrogen peroxide to the control level despite a greater capacity of the thylakoid membranes to leak electrons towards oxygen; moreover, the ascorbate (AsA)/dehydroascorbate (DHA) ratio was unchanged while reduced glutathione (GSH)/oxidized glutathione (GSSG) increaed in comparison with the control. Following the second period of stress, the decreased enzyme defence aactivities of the glutathione reductase (GR), dehydroascorbate reductase (DHAR) and ascorbate peroxidase (AsAP) together with a minor glutathione content might be a consequence of a reduced rate of activated oxygen production
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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