查询词典 provitamin

Flavourful, juicy and refreshing, the apricot possesses one of the highest levels of minerals and provitamin A.

香气浓郁，多汁，清凉解渴，杏子是含矿物质和维生素原A最丰富的水果之一。

Methyl—1,4-naphtho-quinones,including phylloquinone(K1),menaquinones(K2),and menadione(K3). K1 is found in many green leafy vegetables. K2 is produced by a vast array of intestinal bacteria in human body. Menadione (K3) is not considered a natural vitamin K ,but rather a synthetic analoque acts as a provitamin .

Vitamin K是脂溶性维生素，以结构的不同分成K1、K2、K3，其中K1来自日常饮食中的绿叶蔬菜，K2来自肠道中之细菌合成，而K3则是合成维生素，维生素主要功能为催化肝脏合成凝血因子prothrombin促进凝血机制。

There is no recommended upper limit for provitamin A as there have been no defined cases of toxicity.

没有维生素A前体的建议上限，因为尚没有确定的s-胡萝卜素毒性的例子。

Carotenoids act in vivo not only as provitamin A but also as antioxidant agents to prevent several diseases.

类胡萝卜素不仅能作为维生素A的来源，而且能在人体内发挥抗氧化的作用，预防多种疾病的发生。

Provitamin D substances in the diet are also converted to vitamin D by the action of sunlight on the skin.

provitamin d物质在国会也转化为维生素D所采取的行动，阳光对皮肤。

Main ingredients : Natural olive essence , active amino acid , provitamin B5 and etc .

主要成份：天然橄榄精华，活性氨基酸，维他命原B5等

Penetrating liposomes transplant Provitamin B and vitamins A, C, and E to help protect skin from environmental exposure.

穿透脂质体移植维生素B和维生素A， C和E至有助于保护皮肤免受环境暴露。

Main ingredients:Rose essence, moisturizing factor, provitamin B5 and vitamin E.

主要成分：玫瑰花精华、保湿因子、维他命原B5、维他命E。

Provitamin B and vitamin E help soften and nourish skin.

让肌肤焕发健康的光采。维生素 B 和维生素 E 有助于软化及滋养皮肤。

While early studies focused on the potential roles in health and disease of provitamin A carotenoids, such as b-carotene, research over the past decade has provided a framework for our understanding of the functions of non-provitamin A carotenoids such as lycopene, especially in regards to its association with a reduced risk of a number of chronic diseases, including cancer.

人们早期的研究多关注于如β胡萝卜素等维生素A前体类胡萝卜素对于健康和疾病的潜在作用，而近几十年的研究为对于如番茄红素等非维生素A前体类胡萝卜素的功能认知提供了参考，特别是关于它与降低包括癌症在内等慢性病的患病风险的联系。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。