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Microcystis floating colonies in an Erlenmeyer flask. As the etymological derivation implies, Microcystis is characterized by small cells (a few micrometers in diameter), possessing gas-filled vesicles (also lacking individual sheaths). [2]
A range of microalgae species are produced in hatcheries and are used in a variety of ways for commercial purposes, including for human nutrition, [19] as biofuel, [20] in the aquaculture of other organisms, [21] in the manufacture of pharmaceuticals and cosmetics, [22] and as biofertiliser. [23]
The diatom lineage may go back 180 to 250 million years ago (Mya). About 65 Mya, diatoms survived a mass extinction in which roughly 85% of all species perished. [6] Until 1994, the genus was known as Nitzschia, but was changed to Pseudo-nitzschia because of the ability to form chains of overlapping cells, as well as other minor morphological differences. [8]
Emiliania huxleyi was named after Thomas Huxley and Cesare Emiliani, who were the first to examine sea-bottom sediment and discover the coccoliths within it.It is believed to have evolved approximately 270,000 years ago from the older genus Gephyrocapsa Kampter [8] [9] and became dominant in planktonic assemblages, and thus in the fossil record, approximately 70,000 years ago.
The Ministry of Health (Indonesian: Kementerian Kesehatan) is a government ministry which organize public health affairs within the Indonesian government. History