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  • 1
    Electronic Resource
    Electronic Resource
    Numerical analyses of karyotypic diversity in the genusEupatorium (Compositae, Eupatorieae) (1990)
    Springer
    Plant systematics and evolution 170 (1990), S. 215-228 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Compositae ; Eupatorium ; Chromosomal distance ; chromosomal identity ; karyotype analysis ; statistics phenetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Somatic metaphase karyotypes were analyzed for 22 diploid species ofEupatorium. The karyotypic comparisons were made using two indices: minimal chromosomal distance (MCD), measuring overall dissimilarities, and chromosomal identity (CI), measuring number of morphologically identical chromosomes between species. The resulting phenograms from these indices are largely compatible. The 22 species cluster into four groups in the phenogram using MCD, and the grouping corresponds well with morphology or geographic distribution into the three N. American groupsEutrochium, Uncasia, Traganthes, and the E. Asian group. These results suggest that karyotypes in perennialEupatorium have been considerably conservative and changed not through large chromosomal mutations but through small chromosomal mutations gradually fixed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937705
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A correlation of argyrophilic nucleolar organizer regions with prognoses in patients with maxillary sinus squamous cell carcinoma (1994)
    Springer
    European archives of oto-rhino-laryngology and head & neck 251 (1994), S. 229-232 
    Details
    ISSN: 1434-4726
    Keywords: Cell argyrophilic nucleolar organizer region ; Maxillary sinus carcinoma ; Local recurrence ; Metastasis ; Epidermal growth factor receptor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Argyrophilic nucleolar organizer regions (AgNORs) were determined by a semiautomatic image analyzer in a group of 28 patients with T2 or T3 maxillary sinus squamous cell carcinoma. The group was separated into recurrent and non-recurrent groups, metastatic and nonmetastatic groups, as well as groups strongly or weakly positive for epidermal growth factor receptor (EGFR). The mean number and area of AgNOR dots per nucleus and the mean size of each dot were calculated. The mean number and area were significantly greater than those in normal cells (P 〈 0.001), but not in recurrent and non-recurrent groups, metastatic and non-metastatic groups and groups separated by EGFR. There was also no difference found in the mean sizes of tumor and normal cells. These results suggest that AgNOR is related to malignant transformation, but not prognosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00628429
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    Paper (German National Licenses)
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