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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Aequationes mathematicae 15 (1977), S. 49-54 
    ISSN: 1420-8903
    Keywords: Primary 06A10, 05C20 ; Secondary 68A25
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Résumé La famille des préordres sur un ensemble fixé constitue un treillis pour l'inclusion. Répondant à une question rencontrée par S. Eilenberg dans l'étude des automates non déterministes on établit une propriété des chaînes maximales de préordres sur un ensemble fini. On en déduit que si l'ensemble a n éléments, de telles chaînes contiennent au plus [n(n + 1)]/2 préordres.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-203X
    Keywords: axillary buds ; callus ; Colocasia esculenta var. esculenta ; plant regeneration taro corm extract
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Axillary buds of taro (Colocasia esculenta var. esculenta, Araceae) cultured on half strength Murashige-Skoog medium (HMS) containing taro extract (HMSTE) and 2, 4, 5-trichlorophenoxyacetic acid produce a compact, hard, slow growing callus which is not very active morphogenetically and produces only a few plantlets. When cultured on HMSTE plus 5 mg 1−1 each of naphthaleneacetic acid and benzyl adenine (HMSNB) the buds produce a fast growing, friable and morphogenetically active callus. Meristematic regions form on the friable callus after 30 days on HMSNB. If transferred to HMSTE at this point the callus gives rise to plantlets. Addition of taro extract to the media is required for the culture of buds, induction of callus and plantlet regeneration.
    Type of Medium: Electronic Resource
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