The Detritus Nitrogen Problem: New Observations and Perspectives from Organic Geochemistry

Organic Geochemistry of the New Albany Shale in Illinois

Introduction Petroleum Generation and Migration from Source Rocks Organic Geochemical Analysis . . Sampling Techniques Sample Preparation Analytical Procedure Organic Carbon Content . . . Page Page 3 Benzene Extractable Organic 3 Matter 5 Activated Alumina Column 4 Chromatography 5 4 Results of Analyses 7 4 Comparison of Extracted Material to 5 Crude Oil 10

Organic Geochemistry and Paleoenvironments of Deposition of the Middle Jurassic Sediments from the Tabas Basin, Central Iran

In an attempt to reconstruct the paleoenvironments of deposition for the Middle Jurassic Baghamshah formation, samples collected from six outcrop sections along the Shotori swell were subjected to detailed geochemical analyses. Bulk geochemical and biological marker data indicate a logical trend of the variation of organic input, salinity, and oxicity within Baghamshah paleoenvironments across ...

New Perspectives in Biological Nitrogen Fixation Research

Nitrogen fixation, along with photosynthesis is the basis of all life on Earth. Current understanding suggests that no plant fixes its own nitrogen. Some plants (mainly legumes) fix nitrogen via symbiotic anaerobic microorganisms (mainly rhizobia). The nature of biological nitrogen fixation is that the dinitrogenase catalyzes the reaction splitting triple bond inert atmospheric nitrogen (N2) in...

Organic and Inorganic Geochemistry of Coal

The nuclear pairing problem: new perspectives

The overview of the Exact Pairing technique based on the quasispin symmetry is presented. Extensions of this method are discussed in relation to mean field, quadrupole collectivity, electromagnetic transitions, and many-body level density. Realistic calculations compared with experimental data are used to support the methods as well as to emphasize the manifestations of pairing correlations in ...