论文部分内容阅读
6、培养基的配制:配制培养基,首先要配制母液。所用的化学药品,可到化学试剂商店购买,化学纯即可满足要求。然后再分别配制大量元素、铁盐、微量元素、有机物、植物激素母液。配制母液所用的蒸馏水可到大的浴池购买。经过实验,用自来水也可。配制母液费用较高,有条件的可从科研机构直接购买。称量药品所用的感量为0.1克的天平,这种精确度不能满足要求。解决办法有二:其一,利用学校或企业实验室的分析天平称量。其二,利用加倍分割法,在感量为0.1克的天平上称量。具体办法为:设a为所需用量,
6, medium preparation: preparation of medium, first of all, to prepare the mother liquor. The chemicals used can be purchased from chemical stores and chemically pure to meet the requirements. And then were prepared a large number of elements, iron salts, trace elements, organic matter, plant hormone mother liquor. Distilled water used to prepare the mother liquor can be purchased in a large bath. After experiments, tap water can be used. Mother liquor preparation costs are higher, the conditions can be purchased directly from scientific research institutions. Weighing drugs used in the sense of a balance of 0.1 grams, this accuracy can not meet the requirements. There are two solutions: First, the use of analytical balances in schools or business laboratories weighing. Second, the use of double division method, weighing in the balance of 0.1 grams on the scale. The specific approach is: Let a be the required amount,