Sherman Hollar's A closer look at bacteria, algae, and protozoa PDF

By Sherman Hollar

ISBN-10: 161530584X

ISBN-13: 9781615305841

Describes the actual features of bactera, algae and protozoa, and many of the scientific and commercial makes use of of bacteria.

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Extra resources for A closer look at bacteria, algae, and protozoa

Example text

He learned that fermentation, putrefaction, infection, and souring are caused by germs, or microbes—organisms too small to be seen except through a microscope. Pasteur published his first paper on the formation of lactic acid and its function in souring milk in 1857. Further studies developed the valuable technique of pasteurization. The same year he was appointed manager and director of scientific studies at the school where he had received his doctor of science degree, the École Normale Supérieure.

Pasteur saw that fermentation was not a simple chemical reaction but took place only in the presence of living organisms. He learned that fermentation, putrefaction, infection, and souring are caused by germs, or microbes—organisms too small to be seen except through a microscope. Pasteur published his first paper on the formation of lactic acid and its function in souring milk in 1857. Further studies developed the valuable technique of pasteurization. The same year he was appointed manager and director of scientific studies at the school where he had received his doctor of science degree, the École Normale Supérieure.

The tangled seaweed of the Sargasso Sea is brown marine algae belonging to the genus Sargassum, popularly called gulfweed. Most of the weeds are S. natans, a free-floating species, but many other species of Sargassum grow attached to rocks along coasts. S. natans, which is kept afloat by its small but prominent berrylike air bladders, travels with the wind and current. It supports a specialized marine life and provides for seabirds a resting place in the middle of the ocean. An inch-long baby flying fish swims in berried branches of sargassum, Sargasso Sea, Atlantic Ocean.

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A closer look at bacteria, algae, and protozoa by Sherman Hollar


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