Analysis of Volatile Compounds of Four Kinds of Black Tea from China Seed metabolomic study reveals significant metabolite variations and correlations among different soybean cultivars Detetmination of Patulin in Apple Fruit by Gas Chromatography-Mass Spectrometry Analysis Serum metabolome analysis reveals effect of panax notoginosides on ischemic rat after acute myocardial infarction Effect of Psoraleae Fructus and Myristicae Semen in "Ershen pill" on serum metabonomics in spleen-kidney Yang deficiency diarrhea rats before and after processing