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hmily601木虫 (正式写手)
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[求助]
高手翻译下这几句话吧,谢谢哈！！！
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| 经过查阅相关文献，结合氢谱上六个糖端头质子的化学位移值及偶合常数J，初步确定化学位移δH 5.31 (1H, d, J=7.7 Hz)和δH 5.17 (1H, d, J=5.5 Hz)这两个信号为直接连在山奈酚母体结构C-3和C-7的两个半乳糖基的端头质子，根据其偶合常数可知[18]，这两个半乳糖是以β-型糖苷键形式存在；化学位移δH 4.90 (1H, d, J=5.3 Hz)和δH 4.40 (1H, d, J=7.8 Hz)的质子为连在糖链中间的半乳糖基端头氢，从其偶合常数来看，这两个半乳糖都是β-型糖苷键形式存在；化学位移δH 4.57 (1H, d, J=4.5 Hz)和δH 4.53 (1H, d, J=4.2 Hz)对应的两个氢信号则为连在两个糖支链末端的鼠李糖质子信号，根据偶合常数可知，这两个鼠李糖都是以α-型糖苷键形式存在。 |
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terry_well
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爱与雨下(金币+2): 2011-12-12 08:35:18
hmily601(金币+80, 翻译EPI+1): xiexie谢谢你了啊！ 2011-12-12 22:11:06
爱与雨下(金币+2): 2011-12-12 08:35:18
hmily601(金币+80, 翻译EPI+1): xiexie谢谢你了啊！ 2011-12-12 22:11:06
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Upon a review of the literature, combined with the hydrogen spectrum ends six sugar proton chemical shifts and coupling constants J, these two signals of the chemical shifts δH 5.31 (1H, d, J = 7.7 Hz) and δH 5.17 (1H, d, J = 5.5 Hz) was initially identified, which indicated that it was directly connected to the ends proto of two galactose-based segments within a parent structure of kaempferol C-3 and C-7. According to its known coupling constants [18], both of the galactose exists in a form of β-type glycosidic bond. Besides, chemical shift δH 4.90 (1H, d, J = 5.3 Hz) and δH 4.40 (1H, d, J = 7.8 Hz) of the proton is the first hydrogen which in the middle of the galactose sugar chains. From its coupling constant, both of the galactose exists also in a form of β-type glycosidic bond. In addition, chemical shift for two hydrogen signals δH 4.57 (1H, d, J = 4.5 Hz) and δH 4.53 (1H, d, J = 4.2 Hz) are corresponding to the rhamnose proton signal of branched-chain sugars ends. According to the coupling constants, they exist in a form ofα-type rhamnose glycosidic bond. 参考参考。  |
2楼2011-12-12 00:32:20