A mild, convenient protocol for the synthesis of cis-aziridines employs a catalytic amount of Brnsted acid. Diazo compound decomposition via alkylation or homocoupling upon exposure to a proton source is slow relative to [2 + 1] annulation in the presence of a Schiff base. A. L. Williams, J. N. Johnston, J. Am. Chem.
The tropical savanna is a biome characterized by tall grasses and occasional trees. Large regions of tropical savanna extend through the nations of Botswana, Namibia, and Kenya in Africa, southern Brazil, India, and Australia. Surprisingly, the Everglades of southern Florida in North America is also a tropical savanna. Photo  2000-www.arttoday.com.
A nonliving condition or thing, as climate or habitat, that influences or affects an ecosystem and the organisms in it. The abiotic factors of the tropical savanna of Africa are fire, soil, air ,water, and climate.Fire because without it the savanna would just end up being a tropical forest. Soil is important because without soil plants would grow and the vegitarian animals would die messing up the whole food chain. living thing, as an animal or plant, that influences or affects an ecosystem. Some biotic factors of the tropical savanna are: Giraffes, elephants, zebra, lion, gazelle, and emu.