Biological Hydrogen Production: Not So Elementary

Article Abstract:

Hydrogenase is the family of enzymes that catalyze the interconversion of the smallest molecule, hydrogen gas. Researchers have used x-ray crystallography to determine the structure of iron-only hydrogenase from a hydrogen-producing, anaerobic bacterium. The mechanisms underlying natural hydrogen metabolism and their possible exploitation by catalytic chemists are discussed.

Hydrogen, Hydrogenation

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Biological implications of the middle Miocene Amazon seaway

Article Abstract:

Research indicates that an interior seaway occupied the Amazon Basin 10 million years ago. The existence of this sea in the middle Miocene explains the number of marine-derived species in the Amazon River.

Natural history, Amazon River region, Paleontology, Miocene Epoch, Paleogeography

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Biological nitrogen fixation and model chemistry

Article Abstract:

The process by which nitrogenases fix nitrogen in organisms such as plants and bacteria is still poorly understood. A recent study on the reaction of N2 with a mononuclear zirconium complex is described.

Nitrogen, Nitrogen fixation

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