Allen R D, Francis D, Zeh R
Science. 1971 Dec 17;174(4015):1237-40. doi: 10.1126/science.174.4015.1237.
When one pseudopod of an amoeba is sucked into a capillary connected to a partial vacuum and subjected to a pressure reduction of 30 to 35 centimeters of water, extension of other pseudopods, exposed to atmospheric pressure, is not prevented. This result is interpreted to mean that cytoplasmic streaming cannot be the result of a positive pressure gradient generated along the length of the stream, for if it were, streaming would have reversed its direction under the applied pressure gradient of opposite sign and supposedly greater magnitude.
当变形虫的一个伪足被吸入连接到局部真空的毛细管中，并受到30至35厘米水柱的减压时，暴露在大气压力下的其他伪足的伸展并未受到阻碍。这一结果被解释为意味着细胞质流动不可能是沿着液流长度产生的正压力梯度的结果，因为如果是这样的话，在相反方向且假定更大幅度的外加压力梯度下，液流方向将会逆转。
