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本帖最后由 醉酒当歌 于 2014-4-20 23:48 编辑
! q2 ?) {. N! N0 Gwlwlwlwl 发表于 2014-4-20 22:52 
6 T% }0 c& @. l, t% j' q我真是不知道你查的是哪本书。问你,ketone的分子式 RC(=O)R' 能写成 Cm(H2O)n 的形式么? # A+ Q. U$ V: j+ @" _3 {9 x
; |; X t( n9 C- ^A carbohydrate is a large biological molecule, or macromolecule, consisting of carbon (C), hydrogen (H), and oxygen (O) atoms, usually with a hydrogen:oxygen atom ratio of 2:1 (as in water); in other words, with the empirical formula Cm(H2O)n (where m could be different from n).[1] Some exceptions exist; for example, deoxyribose, a sugar component of DNA,[2] has the empirical formula C5H10O4.[3] Carbohydrates are technically hydrates of carbon;[4] structurally it is more accurate to view them as polyhydroxy aldehydes and ketones.[5]2 ]# ]; J4 s- u7 y$ t
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全称是Polyhydroxyl Ketone or polyhydroxy aldehydes. 你说的分子式没错。9 h7 G+ R1 f" D6 D( k! b( S8 J
- f) Y3 ^. _' S2 y6 j$ W/ l+ RCarbonhydrates不是都能吃。你说的充分还是必要条件,本身就与你的逻辑命题相违背。 |
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