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Phospho- and glycolipids with mono- or polyunsaturated fatty acid chains, free and acylated steroids, carotenes and carotenoids, chlorophylls, and related pheophytins were detected in crude extracts by NMR spectroscopy without any need for prior separation. A broad range of molecules belonging to di
## Abstract In the advanced stage of nonβisothermal sintering, vacancy clusters are present as prevailing type of defects. Their concentration considerably decreases at further temperature increase, and it can be concluded that thermally activated conversion of multiple vacancies into climbable dis
This report describes the selective detection of volatile nickel, vanadium, and iron metalloporphyrins in crude oil samples. An possible to determine directly the volatile metal content of a crude oil as a function of its boiling point. atomic emission detector (AED) was used for simultaneous detect