吉林陨石中的氨基酸

Amino acids have been separated from and identified in the Jilin meteorite No.Ⅰ and Ⅱ by gas-liquid chromatography. Eight kinds of amino acid, i.e., α-alanine,valine, glycine, isoleucine, β-alanine, leucine, proline, and threonine are observed in meteorite No. Ⅰ Ten varieties of amino acids including serine, hydroproline, lysine and etc. are noticed from meteorite No. Ⅱ. A brief diseussion is given to the origin of these acids.     

正烷烃在石油地球化学中的作用

The possibility is explored of using the characteristics of n-alkane distribution as an indicator of oll generating rocks and as indices for some other interesting aspects concerning the secondary migration of oil. It is suggested that the upper limit of the n-alkane OEP value of oil generating rocks should be considered as a function of the age of oil formation rather than a constant regardless of the difference in age. For a given stratum in a given region, it possesses a fixed value which can be defined through analyses and calculations with respect to the known oil generating rocks within rids stratum.     

吉林陨石的烃类和嘌呤、嘧啶化合物

Preliminary investigation was earried out on the Jilin meteorite for hydrocarbonand nitrogen-bearing organic compounds. It shows that the meteorite contains 68 ppm of soluble organic matter, among which the normal alkanes amount to 0.36---0.48 ppm,with carbon number distribution ranging from C17 to C31, and the aromatic hydrocarbons herein are mainly composed of polyalkyl-substituted less condensed rings. Purine derivatives and pyrimidine have also been found. A discussion is given as to the origin of these organic substanees.