Nitrogen Fixation by Free-Living Micro-Organisms

Nitrogen fixation by free-living bacteria. Physiology and ecology of free-living, nitrogen-fixing bacteria. Anaerobic nitrogen-fixing bacteria of different soil types. Nitrogen fixation in the rhizosphere of tropical grasses. Nitrogen fixation in the rhizosphere of rice plants. The broadbalk experiment. An investigation of nitrogen gains from non-symbiotic nitrogen fixation. Nitrogen fixation in the phyllosphere. Associative growth of nitrogen-fixing bacteria with other micro-organisms. Nitrogen fixation associated with vascular aquatic macrophytes. Nitrogen fixation by free-living, blue-green algae. Nitrogen assimilation and metabolism in blue-green algae. The physiology of nitrogen fixation by a gloeocapsa sp. Nitrogen fixation by blue-green algae in polar and subpolar regions. Nitrogen fixation by blue-green algaein temperate soils. A comparison of nitrogen fixation by algae of temperate and tropical soils. The role of blue-green algae in tropical rice cultivation. Research on blue-green algae in Egypt, 1958-1972. Nitrogen-fixing algae in Morocco. The acetylene-reduction technique. Recent stydies using the acetylene-reduction technique as an assay for field nitrogen fixation levels. Seasonal and diurnal variations in N2(C2H2)-fixing activity in field soybeans. Acetylene-reduction assay at ambient Po2 of field and forest soils: laboratory and field core studies. The biochemistry of nitrogen fixation. Some aspects of leghaemoglobin biosynthesis. Preparation and properties of nitrogenase proteins. Morphology, reactions and characteristics of nitrogenase proteins. Kinetics and mechanism of nitrogenase action. Reductants for nitrogenase and relationships to cellular electron transport. Relationships between nitrogenase systems and ATP-yielding processes. Azotobacter nitrogenase: ATP kinetics and inhibition by high ionic strength. Azotobacter nitrogenase: mechanism and kinetics of allene reduction.