Cultivation affects soil organic nitrogen: pyrolysis-mass spectrometry and nitrogen K-edge XANES spectroscopy evidence was written by Leinweber, Peter;Walley, Fran;Kruse, Jens;Jandl, Gerald;Eckhardt, Kai-Uwe;Blyth, Robert I. R.;Regier, Tom. And the article was included in Soil Science Society of America Journal in 2009.Product Details of 3034-41-1 This article mentions the following:
Elucidating mol.-chem. changes that the soil organic N (SON) pool has undergone following long-term cultivation remains a challenge. Our objective was to examine SON compounds in paired native and long-term cultivated soils using three independent anal. methods. Curie-point pyrolysis-gas chromatog./mass spectrometry revealed approx. 60 different organic N-containing mols. of which 11, 13, and 14 were less and 8, 16, and 11 more abundant in the cultivated than in the native soils from Lethbridge, Macklin, and St. Denis, resp. Pyrolysis-field ionization mass spectrometry (Py-FIMS) revealed that heterocyclic N compounds such as substituted pyrroles and pyridines contributed to the overall cultivation-induced changes. Furthermore, Py-FIMS showed that cultivated sites preferentially lost thermally labile peptides and, to a lesser extent, other labile N-containing compounds The magnitude of losses decreased in the order Lethbridge (80 yr cultivation) > Macklin (85 yr cultivation) > St. Denis (57 + yr cultivation). Relative gains in thermally stable N-containing compounds (all sites) and peptides (Macklin only) followed the same order. The weaker cultivation effect at St. Denis probably reflects a greater inherent stability of SON compounds in the native soil, as indicated by onsets and peaks in the thermal volatilization curves at 40 K higher pyrolysis temperature Synchrotron-based N K-edge x-ray near-edge fine structure spectroscopy confirmed the enrichment of nitriles and N-heterocycles in the cultivated Lethbridge soil at the expense of amide N. Our multimethodol. approach provided evidence for the enrichment of a relatively stable nonproteinaceous pool of SON on cultivation. In the experiment, the researchers used many compounds, for example, 1-Methyl-4-nitroimidazole (cas: 3034-41-1Product Details of 3034-41-1).
1-Methyl-4-nitroimidazole (cas: 3034-41-1) belongs to imidazole derivatives. Among the different heterocyclic compounds, imidazole is better known due to its broad range of chemical and biological properties. Imidazole has become an important synthon in the development of new drugs. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.Product Details of 3034-41-1
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem