Noever D A
Universities Space Research Association, NASA Marshall Space Flight Center, Huntsville, Alabama 35812, USA.
Phys Rev A Gen Phys. 1991 Oct 15;44(8):5279-91. doi: 10.1103/physreva.44.5279.
Measurements are reported of the evolution of bioconvective patterns in shallow, dense cultures of microorganisms subjected to varying gravity. Various statistical properties of this random, quasi-two-dimensional structure have been found: Aboav's law is obeyed, the average vertex angles follow predictions for regular polygons, and the area of a pattern varies linearly with its number of sides. As gravity varies between 1 g and 1.8g (g = 9.8 m s-1), these statistical properties continue to hold despite a tripling of the number of polygons and a reduced average polygon dimension by a third. This work compares with experiments on soap foams, Langmuir monolayer foams, metal grains, and simulations.
报告了在不同重力条件下，浅而密集的微生物培养物中生物对流模式的演变测量结果。已发现这种随机的准二维结构的各种统计特性：遵循阿博阿夫定律，平均顶角符合正多边形的预测，并且模式的面积与其边数呈线性变化。当重力在1g至1.8g之间变化时（g = 9.8 m s-1），尽管多边形数量增加了两倍且平均多边形尺寸减小了三分之一，但这些统计特性仍然成立。这项工作与肥皂泡、朗缪尔单层泡沫、金属颗粒的实验以及模拟进行了比较。
