Chemical composition and antimicrobial activity of essential oils from Cuminum cyminum L. collected in different areas of Morocco

Essential oils from 8 Cuminum cyminum local populations collected in Morocco were investigated for their chemical composition and antimicrobial activity. The chemical composition, investigated by gas chromatographic technique, revealed a common fingerprint in all Moroccan samples: twenty-five compounds were identified with γ-terpinen-7-al being the major component in all samples studied. The antimicrobial activity of cumin essential oils were tested against 10 bacterial strains, belonging to 8 different species, and 6 yeast strains, belonging to 4 species. Lactic acid bacteria showed a good resistance to all essential oil tested while overall the cumin essential oils showed a strong antifungal activity that affected both maximum specific growth rate and lag tim

A new species of Mimetes (Proteaceae) from the southern Cape

A remarkable hitherto unknown species of Mimetes not obviously related to any other species in the genus, is here described as Mimetes chrysanthus. It is endemic to the Gamka Mountain Nature Reserve, an inselberg near Oudtshoorn in the Little Karoo. The bright yellow flowers appear to be pollinated by sunbirds and carpenter bees

Cyclometallated nitrogen heterocycles

The cyclometallation of four different classes of nitrogen heterocycle (pyridazine, tetrazines, pyrazines and pyrimidines) by palladium and platinum has been studied. Pyridazines readily form singly and doubly cyclometallated compounds, whilst pyrazines only metallate once. Both tetrazines and pyrimidines readily metallate once and doubly metallated species have been identified in solution. The use of trans-cyclometallating reagents based on benzylamine and Schiff's base ligands was also studied: considerable promise was shown by a benzylamine compound. The multiple cyclometallation of 4 different classes of nitrogen heterocycle by palladium and platinum has been studied

The Synthesis and Characterization of Potentially Mesomorphic Carbonyl-Complexes of Tungsten(0) with Substituted Pyridines

Some new tungsten carbonyl complexes have been synthesized with stilbazole type ligands. Their potential as liquid crystals is discussed