奇偶优势比（Odd-Even Predominance） 计算主峰碳前后（连同主峰碳）相邻的5个正烷烃奇数碳与偶数碳烃含量的比值
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odd-even predominance of n-alkanes 正烷烃奇偶优势
·2,447,543篇论文数据，部分数据来源于NoteExpress
The test results of 30 samples collected in 4 wells indicate that the abundance and extractable contents of organic matter in the coal measures are both high, n alkane possesses odd even predominance;
口井30 余块样品测试结果表明，煤系有机质丰度及可抽提有机质的量都较高；正构烷烃具明显奇偶优势；
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