Vol. 25 No. 2/3 (1992)

Larutan kromium klorida diberikan secara intraperitoneal dengan dosis tunggal 15, 22, 5, dan 30 mg Cr/kg berat badan pada mencit yang hamil 8, 10, atau 12 hari. Mencit control dan perlakuan dibunuh kemudian dibedah pada hari kehamilan ke-18. Selanjutnya, dilakukan pengamatan terhadap kejadian kematian intrauterus, berat fetus, malformasi eksternal, internal, dan rangka fetus. Hasil pengamatan menunjukkan bahwa kromium trivalent menyebabkan jumlah embrio yang diresorpsi meningkat secara nyata, berat fetus berkurang dengan sangat nyata, terjadi kelambatan penulangan badan vertebra servikalis,…

Single linkage is equivalent to sub-dominant ultrametric. Many algorithms are available for constructing these two objects. But all of then, except one which was proposed by Gondran, are very tedious because of the lack of algebraic structure. Gondran used a special algebraic system as theoretical bases. But it seems rather artificial. In this paper, we propose a more formal approach based on fuzzy relation. The main result presented here is the equivalence between sub-dominant ultrametric and the min-max transitive closure of a symmetric and anti reflexive fuzzy relation. This property…