So has the use of vitamin a to strengthen children ' s immune systems , and chemically treated bed nets to prevent malaria 使用维生素a来增强儿童的免疫系统，以及使用经过杀虫剂处理的蚊帐来预防疟疾。
Foodstuffs - determination of vitamin a by high performance liquid chromatography - measurement of all - trans - retinol and 13 - cis - retinol 食品.高性能液相色谱法测定维生素e .所有反式和顺式维生素a的测定
So has the use of vitamin a to strengthen children ' s immune systems , and chemically treated bed nets to prevent malaria 另外用维生素a加强儿童的免疫系统和药物处理的蚊帐预防疟疾也起到了很大的作用。
So has the use of vitamin a to strengthen children ' s immune systems , and chemically treated bed nets to prevents malarial 而且，应用维生素a来加强孩子的免疫系统，用化学的方法来处理基础网状物以预防疟疾。
Retinol - binding protein ( rbp ) is a carrier transporting vitamin a . it plays an important role in the distribution of vitamin a 维生素a结合蛋白是体内维生素a的转运蛋白，在维生素a的代谢中起重要作用。
Animal feeding stuffs - determination of vitamin a content - method using high - performance liquid chromatography iso 14565 : 2000 ; german version en iso 14565 : 2000 动物饲料.维生素a含量测定.高性能液相色谱法
Now it is rare to find cases of serious malnutrition caused by shortage of food or cases of serious vitamin - a deficiency 儿童营养状况逐步提高，由食物缺乏引起的严重营养不良和严重维生素a缺乏症在中国已很少见。
Fruits and vegetables are excellent sources of vitamin a and c . vitamin a is required for normal night vision and healthy skin 蔬果类是维生素a及c的上佳来源。维生素a协助夜间视力，及维持皮肤和黏膜组织的健康。
It is especially important to have a high level of vitamin a liver storage in the event that young chicks contract a severe case of coccidiosis 当幼雏患严重球虫病的情况下，高水平的维生素a肝贮量是特别重要的。
Foodstuffs - determination of vitamin a by high performance liquid chromatography - part 1 : measurement of all - trans - retinol and 13 - cis - retinol 食品.用高性能液相色谱对维生素a含量的测定.第1部分:全视黄醇和13 -顺式视黄醇
