Lutein is dihydroxy - carotenoids with the ionone ring systems distributed widely in nature.

叶黄素是含紫罗酮环的二 羟基 类胡萝卜素,在自然界广泛存在.

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DHDMEU ( 4, 5 - dihydroxy - 1 , 3 - dimethyl ethylene urea )

4, 5- 二羟基 -1, 3- 二甲基乙烯脲 ( 无甲醛交联整理剂 )

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Significant increases in both 25 - hydroxy and 1, 25 - dihydroxy - vitamin D levels were seen after hemodialysis mode conversion.

羟基 维生素D和 1, 25二羟维生素D3水平在血液透析模式转换后都显著上升.

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Lutein and zeaxanthin are both dihydroxy - carotenoids with the ionone ring systems distributed widely in nature.

叶黄素和玉米黄质是含紫罗酮环的二 羟基 类胡萝卜素,在自然界广泛存在.

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A sensitive chromogenic reagent , 2 - ( 4 - chloro - 2 - phosphophenylazo ) - 7 - ( 2,4 - dichlorophenylazo ) - 1,8 - dihydroxy - 3,6 - naphthalene disulfonic acid ( abbreviation : DC - CPA ), has been used in the spectrophotometric determination of bismuth.

研究了 2- ( 4-氯 -2- 膦酸基苯偶氮 ) -7- ( 2, 4- 二氯苯偶氮 ) -1, 8-二羟基-3, 6- 萘二磺酸 ( DC -CPA ) 与铋的显色反应.

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