正面
发表于 2025-3-23 11:05:51
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arrogant
发表于 2025-3-23 16:36:16
https://doi.org/10.1007/978-3-662-09730-4active substance. Although the postulate that at least one unsubstituted .-ionone ring must be present in provitamins A has been rather generally accepted, there are some exceptions. For example, 2,2′-dimethyl-.-carotene is effective in the rat to the extent of one half of the .-carotene potency .
Outmoded
发表于 2025-3-23 18:27:41
Isomerism and Provitamin A Effect of Carotenoidsactive substance. Although the postulate that at least one unsubstituted .-ionone ring must be present in provitamins A has been rather generally accepted, there are some exceptions. For example, 2,2′-dimethyl-.-carotene is effective in the rat to the extent of one half of the .-carotene potency .
Gratulate
发表于 2025-3-24 00:40:00
Rehabilitation Science in Contextnjugated systems. Because the degree of the double bond character is subject to considerable variation along the chain, the extent of liability of a given steric form depends not only on the number but also on the location of . double bonds, hence on the .shape of the molecule.
Adrenaline
发表于 2025-3-24 04:36:37
Zusammenfassung der Diskussionsergebnisseesence of some directing and protective mechanism that forms and preserves the all-. configuration, even when the pigment is exposed to strong sunlight and heat; similar conditions cause . → . rearrangements in extracts. After a . carotenoid has been formed, its configuration is likewise protected in the plant.
BET
发表于 2025-3-24 07:44:01
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minimal
发表于 2025-3-24 11:26:27
Naturally Occurring , and Poly, Carotenoidsesence of some directing and protective mechanism that forms and preserves the all-. configuration, even when the pigment is exposed to strong sunlight and heat; similar conditions cause . → . rearrangements in extracts. After a . carotenoid has been formed, its configuration is likewise protected in the plant.
有说服力
发表于 2025-3-24 16:18:29
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注意到
发表于 2025-3-24 20:57:58
Preparation of , Carotenoids by Total Synthesis has appeared (.). The present report, which of course cannot do justice to the authors active in this fascinating field, will be restricted to a few stereo chemically important aspects of carotenoid synthesis.
喃喃诉苦
发表于 2025-3-25 00:21:51
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