New carotenoids of the formula
, wherein R and n have the significances given herein, are useful for pigmenting the egg yolk, integuments and/or subcutaneous fat of poultry and the meat and/or integuments of fish and crustacea when included in the feed of the poultry, fish or crustacea. As well as such carotenoids and method of pigmenting the invention further embraces the pertinent carotenoid-enriched feed for poultry, fish or crustacea, the premixes for incorporation in such feeds and beadlets containing one or more of these carotenoids for incorporation in such premixes and the use of the carotenoids in the pigmenting method. The process of manufacturing such carotenoids, which more specifically may be designated as carotenoid ketones, monoesters and diesters, also represents an aspect of the invention.
新的类胡萝卜素配方
其中 R 和 n 具有本文给出的意义,当加入家禽、鱼类或甲壳类动物的饲料中时,可用于家禽的蛋黄、内脏和/或皮下脂肪以及鱼类和甲壳类动物的肉和/或内脏的色素添加。除了这些类胡萝卜素和色素添加方法,本发明还包括用于家禽、鱼类或甲壳类动物的相关类胡萝卜素富集饲料,用于添加到这些饲料中的预混料,以及用于添加到这些预混料中的含有一种或多种类胡萝卜素的微珠,以及类胡萝卜素在色素添加方法中的使用。制造此类类胡萝卜素(更具体地说,可指定为类胡萝卜素酮、单酯和二酯)的工艺也代表了本发明的一个方面。