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PROF. DR HAB. JANUSZ LIPECKI WYBITNY NAUKOWIEC, NAUCZYCIEL I PRAKTYK
Get PDF Prof. dr hab. Janusz Lipecki, wybitny naukowiec, nauczyciel i prakty
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Reaction of redroot pigwed (Amaranthus retroflexus L.) plants to simazine
Get PDFSimazine at the doses of 5 and 10 kg ha-1 a.i. caused a significant increase in the fresh matter and non significant increase in the height of Amaranthus retroflexus L. seedlings when compared with untreated plants. There were no significant differences in the weight of 100 seeds and in the content of mineral elements (except Mg) in plants treated with different doses of simazine. Preliminary measurements done in 1988 pointed out that the length of inflorescences increased after the use of simazine, especially in the dose of 10 kg ha-1 a.i
Capsella bursa + pastoris (L.) Med. - another weed resistant to Simazine?
Get PDFBiotypes of Capsella bursa-pastoris resistant to Simazine were found in orchards in the Lublin region in the years 1984-1986. This resistance was confirmed in pot experiments in 1986. Capsella bursa-pastoris L. has not been listed up to now among species in which such a resistance was found
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