Three varieties of S.tuberosum were used in the experiment. The flower buds of 2~ 12mm were taken from field and pollen grains were stained with aceto carmine and their development stages were observed under optical microscope. 试验采用3个马铃薯栽培品种为材料,取2~12mm的花蕾,用醋酸&洋红压片法制片,在普通研究显微镜下观察花粉发育状况。
In this paper we studied the simple history, principle, process and selective method of carrier and medium of production of acetone and butanol with fermentive method of clostridium aceto-butylicum. 本文研究了丙丁菌发酵法生产丙酮和丁醇的简史、原理、过程,以及载体和培养基的选择方法。