MANSUR, M., SALAMAH, A., MIRMANTO, E. & BREARLEY, F. Q. 2022. Nutrient concentrations in three Nepenthes species (Nepenthaceae) from North Sumatra. Reinwardtia 21(2): 55‒62. — is a genus of carnivorous plants that are unique ornamental plants, but their nutrient concentration relationships have not been studied much, especially endemic on the island So far, analysis mostly limited to leaves...

Among the extensive collections currently being made in Guyane (French Guiana), adults of a large and colorful species of pseudomorphine were encountered. The adults present, for the first time in the Western Hemisphere, elytra with a marked color pattern, and in addition a size considerably beyond that of the rest of the members of all other known genera in the Western Hemisphere. Both of thes...

Various species of Streptomyces possess aminoglycoside-modifying enzymes. Streptomyces kanamyceticus contains an enzyme that acetylates the 6'-amino group of kanamycin A and B, gentamicin C(1a), and neomycin. Streptomyces spectabilis produces an enzyme that acetylates the 2'-amino group of the hexose ring of gentamicin C(1a). These enzymes catalyze reactions identical to those catalyzed by enzy...

Trobicin (Actinospectacin) is a new antibiotic obtained from Streptomyces spectabilis developed by the Research Laboratories of Messrs. Upjohn. It is prepared as a white powder, 1 4-1 6 g. of which is dissolved in distilled water. It has been stated to have a wide range of antibacterial activity and has already been shown (Willcox, 1962) to be effective in cases of acute gonorrhoea in males whe...