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按一些教科书介绍的方法作渗透实验(图左),常有如下不足:漏斗不易买到;颈较粗水分上升不明显;口大,需用大块半透膜覆盖,如果盖不紧,常向外突出,影响实验效果。据此,我们作了如下改进,效果很好。取1—5毫升的移液管与T形玻璃管的一端烧接起来(如受条件限制,可用胶管连接)。为操作方便,最好将T形管的一个分枝弯成与移液管平行。下口用半透膜(可用近似的半透膜如
According to some textbook introduction method for infiltration experiment (left), often the following deficiencies: funnel not easy to buy; neck coarse water rise is not obvious; mouth large, the need to use large semi-permeable membrane cover, if the lid is not tight, often Outwardly protruding, affecting the experimental results. Accordingly, we made the following improvements, the effect is very good. Take 1 to 5 ml of pipette and T-shaped glass tube end burned (subject to conditions, available hose connection). For ease of operation, it is best to bend a branch of the T-tube parallel to the pipette. Under the mouth with semi-permeable membrane (available semi-permeable membrane similar