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Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp.
No full textXu, Zhen-Lu, Yan, Dao-Jiang, Tan, Xiang-Mei, Niu, Shu-Bin, Yu, Meng, Sun, Bing-Da, Ding, Cai-Feng, Zhang, Yong-Gang, Ding, Gang (2022): Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp. Phytochemistry (112969) 194: 1-6, DOI: 10.1016/j.phytochem.2021.112969, URL: http://dx.doi.org/10.1016/j.phytochem.2021.11296
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
Fig. 2. Key 2 D in Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp.
No full textFig. 2. Key 2 D-NMR correlations and NOE spectral analysis of phaeosphspirone.Published as part of Xu, Zhen-Lu, Yan, Dao-Jiang, Tan, Xiang-Mei, Niu, Shu-Bin, Yu, Meng, Sun, Bing-Da, Ding, Cai-Feng, Zhang, Yong-Gang & Ding, Gang, 2022, Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp., pp. 1-6 in Phytochemistry (112969) 194 on page 2, DOI: 10.1016/j.phytochem.2021.112969, http://zenodo.org/record/819443
Fig. 4 in Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp.
No full textFig. 4. Δδ values (in ppm) = δS - δR for (R)- and (S)-MPTA diesters 1a/1b and 1′a/1′b.Published as part of Xu, Zhen-Lu, Yan, Dao-Jiang, Tan, Xiang-Mei, Niu, Shu-Bin, Yu, Meng, Sun, Bing-Da, Ding, Cai-Feng, Zhang, Yong-Gang & Ding, Gang, 2022, Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp., pp. 1-6 in Phytochemistry (112969) 194 on page 3, DOI: 10.1016/j.phytochem.2021.112969, http://zenodo.org/record/819443
Fig. 5. A in Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp.
No full textFig. 5. A: Comparison of the fusarubin gene cluster fsr and phaeosphspirone gene cluster. B: Phylogenetic analysis of the phaeosphspirone gene cluster in Phaeosphaeriaceae sp.Published as part of Xu, Zhen-Lu, Yan, Dao-Jiang, Tan, Xiang-Mei, Niu, Shu-Bin, Yu, Meng, Sun, Bing-Da, Ding, Cai-Feng, Zhang, Yong-Gang & Ding, Gang, 2022, Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp., pp. 1-6 in Phytochemistry (112969) 194 on page 4, DOI: 10.1016/j.phytochem.2021.112969, http://zenodo.org/record/819443
Fig. 1 in Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp.
No full textFig. 1. Structures of phaeosphspirone (1/1′), herbarin (2) and O-methylherbarin (3).Published as part of Xu, Zhen-Lu, Yan, Dao-Jiang, Tan, Xiang-Mei, Niu, Shu-Bin, Yu, Meng, Sun, Bing-Da, Ding, Cai-Feng, Zhang, Yong-Gang & Ding, Gang, 2022, Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp., pp. 1-6 in Phytochemistry (112969) 194 on page 2, DOI: 10.1016/j.phytochem.2021.112969, http://zenodo.org/record/819443
Fig. 3 in Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp.
No full textFig. 3. Top ten phaeosphspirone (1/1′) candidates generated by ACD/Structure Elucidator.Published as part of Xu, Zhen-Lu, Yan, Dao-Jiang, Tan, Xiang-Mei, Niu, Shu-Bin, Yu, Meng, Sun, Bing-Da, Ding, Cai-Feng, Zhang, Yong-Gang & Ding, Gang, 2022, Phaeosphspirone (1/1 ), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp., pp. 1-6 in Phytochemistry (112969) 194 on page 3, DOI: 10.1016/j.phytochem.2021.112969, http://zenodo.org/record/819443
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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