共 19 条
Nutrient chemotaxis suppression of a diffusive instability in bacterial colony dynamics
被引:7
作者:

Arouh, S
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

Levine, H
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
机构:
[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
来源:
PHYSICAL REVIEW E
|
2000年
/
62卷
/
01期
关键词:
D O I:
10.1103/PhysRevE.62.1444
中图分类号:
O35 [流体力学];
O53 [等离子体物理学];
学科分类号:
070204 ;
080103 ;
080704 ;
摘要:
Bacteria grown on a semisolid agar surface have been observed to form branching patterns as the colony envelope propagates outward. The fundamental cause of this instability relates to the need for limited nutrient to diffuse towards the colony. Here, we investigate the effect on this instability of allowing the bacteria to move chemotactically in response to the nutrient gradient. Our results show that this additional effect has a tendency to suppress the instability. Our calculations are done within the context of a simple "cutoff" model of colony dynamics, but presumably remain valid for more complex and hence mon realistic approaches.
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页码:1444 / 1447
页数:4
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