| 序号 | 英文主题词 | 中文主题词 | 命中文献数量（篇） |
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| 期刊 | 博硕士论文 | 会议论文 | 报纸 | 年鉴 | 成果 | 专利 | 国家标准 | 行业标准 | 标准 | 总计 | | 2241 | 4-Hydroxyphenylpyruvate Dioxygenase | 4-羟苯丙酮酸二氧酶 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 2242 | 4-Hydroxybenzoate-3-Monooxygenase | 4-羟基苯甲酸盐-3-单氧化酶 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | | 2243 | 4-Hydroxycoumarins | 4-羟基香豆素类 | 2774 | 55 | 185 | 163 | 5 | 6 | 3 | 0 | 0 | 1 | 3192 | | 2244 | 4-Nitrophenylphosphatase | 4-硝基苯磷酸酶 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 2245 | 4-Nitroquinoline-1-oxide | 4-硝基喹啉-1-氧化物 | 26 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 31 | | 2246 | 5,10-Methylenetetrahydrofolate Reductase (FADH2) | 5,10-亚甲基四氢叶酸还原酶(FADH2) | 27 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 27 | | 2247 | 5,6-Dihydroxytryptamine | 5,6-二羟色胺 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | | 2248 | 5,7-Dihydroxytryptamine | 5,7-二羟色胺 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | | 2249 | 5,8,11,14-Eicosatetraynoic Acid | 5,8,11,14-花生四烯酸 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | | 2250 | 505 Shen Gong Yuan Qi Bag | 505神功元气袋 | 155 | 0 | 2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 162 | | 2251 | 5' Untranslated Regions | 5'非翻译区 | 88 | 8 | 9 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 106 | | 2252 | 5'-Nucleotidase | 5'-核苷酸酶 | 103 | 5 | 2 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 115 | | 2253 | 5-Methylcytosine | 5-甲基胞嘧啶 | 13 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 15 | | 2254 | 5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase | 5-甲基四氢叶酸-高半胱氨酸S-甲基转移酶 | 37 | 5 | 4 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 47 | | 2255 | 5-Methoxytryptamine | 5-甲氧色胺 | 12 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | | 2256 | 5'-Guanylic Acid | 5'-鸟苷酸 | 3381 | 90 | 107 | 2052 | 591 | 18 | 3 | 0 | 0 | 0 | 6332 | | 2257 | 5' Flanking Region | 5'旁侧区 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 2258 | 5-Hydroxytryptophan | 5-羟色氨酸 | 2781 | 250 | 157 | 88 | 12 | 15 | 20 | 0 | 0 | 0 | 3323 | | 2259 | 6-Cyano-7-nitroquinoxaline-2,3-dione | 6-氰-7-硝基喹喔啉-2,3-二酮 | 21 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 22 | | 2260 | 6-Mercaptopurine | 6-巯嘌呤 | 855 | 22 | 57 | 40 | 6 | 0 | 3 | 0 | 0 | 0 | 983 |
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