Azotobacter - Encyclopedia.com
WEBMay 23, 2018 · Azotobacter. Azotobacter (family Azotobacteraceae) A genus of bacteria characterized by the production of differentiated resting cells called cysts. Vegetative cells are typically ovoid in shape and can carry out nitrogen fixation. There are several species, found in soil and water. Azotobacter The genus Azotobacter is comprised of bacteria ...
Nitrogen Fixation - Encyclopedia.com
WEBMay 14, 2018 · These nitrogen-fixing bacteria include species of the genera Rhizobium, Anabaena, Azotobacter, and Clostridium, as well as others. Each of the nitrogen-fixing bacteria employs the same enzyme, nitrogenase. The nitrogenase enzyme is shaped something like a butterfly, and contains an atom of molybdenum at …
Martinus Willem Beijerinck - Encyclopedia.com
WEBMay 14, 2018 · BEIJERINCK, MARTINUS WILLEM. (b. Amsterdam, Netherlands, 16 March 1851; d. Gorssel, Netherlands, 1 January 1931), microbiology, botany. Beijerinck was the youngest of four children of Derk Beijerinck, a tobacco dealer, and Jeannette Henriëtte van Slogteren, After going bankrupt when Martinus was …
Nitrogen Cycle in Microorganisms - Encyclopedia.com
WEBA bacterial enzyme called nitrogenase is capable of breaking the tenacious bond that holds the two nitrogen atoms together. Examples of nitrogen-fixing bacteria include Azotobacter, Beijerinkia, some species of Klebsiella, Clostridium, Desulfovibrio, purple sulfur bacteria, purple non-sulfur bacteria, and green sulfur bacteria.
Eubacteria - Encyclopedia.com
WEBMay 29, 2018 · Eubacteria. The Eubacteria, also called just "bacteria," are one of the three main domains of life, along with the Archaea and the Eukarya. Eubacteria are prokaryotic, meaning their cells do not have defined, membrane-limited nuclei. As a group they display an impressive range of biochemical diversity, and their numerous members are found in ...
Bacteria - Encyclopedia.com
WEBMay 21, 2018 · Bacteria are classified as prokaryotes. Broadly, this taxonomic ranking reflects the fact that the genetic material of bacteria is contained in a single, circular chain of deoxyribonucleic acid (DNA) that is not enclosed within a nuclear membrane. The word prokaryote is derived from Greek meaning “ prenucleus.
Nitrogen Cycle - Encyclopedia.com
WEBMay 23, 2018 · With the exception of the water fern, these plants are typically pioneer species growing in low-nitrogen soil. Other nitrogen-fixing bacteria live as free-living species in the soil. These include microbes in the genera Azotobacter and Clostridium, which live in aerobic and anaerobic sediments, respectively.
Albert Jan Kluyver - Encyclopedia.com
WEBKluyver, Albert Jan (1888-1956) Dutch microbiologist, biochemist, and botanist. Albert Jan Kluyver developed the first general model of cell metabolism in both aerobic and anaerobic microorganisms , based on the transfer of hydrogen atoms. He was a major exponent of the "Delft School" of classical microbiology in the tradition of Antoni van ...