Getah Jarak Tintir (Jatropha multifida Linn.) yang berasal dari famili Euphorbiaceae diketahui memiliki kandungan fenolik dan flavonoid berpotensi sebagai antioksidan alami. Penelitian ini bertujuan untuk mengetahui metabolit antioksidan, interaksi senyawa sekunder dalam getah jarak tintir dengan enzim tirosinase, mengaplikasikannya bentuk sediaan. Metode pengujian dilakukan metode DPPH aktivit...

The conformation o f the two algal pheromones ectocarpene (1) and multifidene (2) was studied by the active analogue approach using molecular mechanics calculations within the software package SYBYL. A common conformation for both pherom ones and all active analogues was filtered out by superpositionand energy minimizing procedures starting from crystallographic data of the Cambridge Structural...

Bracken fern (Pteris aquilina) mixed with a grain mixture (1:3 by weight) was fed to a group of 40 female 6-week-old Swiss mice intermittently every other week for a total experimental period of 60 weeks. Thirty-three mice survived 30 or more weeks and all developed lymphatic leukemia with multiple organ involvement. Additionally, 5 mice developed multiple pulmonary tumors. No urinary bladder o...

Cattle were fed a diet containing bracken fern in the continuation of a study of the urinary bladder neoplasms produced under these conditions. One of the cattle died of a traumatic pericarditis and had no bladder lesion at 485 days. The other six animals fed bracken fern for from 510 to 1920 days all had gross bladder neoplasms. Four of the six animals with gross bladder neoplasms had transiti...

J. Mlinarec1, Z. Šatović2, N. Malenica1, I. Ivančić-Baće1 and V. Besendorfer1,* Faculty of Science, University of Zagreb, Division of Biology, Department of Molecular Biology, Horvatovac 102a, HR-10000 Zagreb, Croatia and Department of Seed Science and Technology, Faculty of Agriculture, University of Zagreb, Svetošimunska 25, HR-10000 Zagreb, Croatia * For correspondence. E-mail [email protected]...

Bystropogon (Lamiaceae) is endemic to the Macaronesian Islands and represents the best-known example of a putative phytogeographic connection between these islands and the New World. Previous morphological taxonomic studies suggested that this genus is closely related to the western South American Minthostachys. Phylogenetic analyses of nucleotide sequences of the internal transcribed spacers a...