Petri Dish Culture — Bacteria Colony Growth Pattern
130.29 $
A Petri dish bacterial culture photographed with transmitted light after 72 hours of growth — the colony margins showing fractal dendritic growth patterns whose geometry reveals the growth conditions and species characteristics.
Description
Bacterial colony growth pattern photography at the Petri dish scale — not electron microscopy, but simple transmitted light photography at 1–2:1 reproduction — reveals the extraordinary complexity of microbial growth dynamics. This image was made of a 72-hour Bacillus subtilis culture on standard nutrient agar, the Petri dish photographed on a backlit light box with a 90mm macro lens at 1.5:1 reproduction. The colonies have grown from a central inoculation point, the leading edges showing the dendritic fractal growth pattern characteristic of B. subtilis growth under the specific agar concentration used — a growth pattern that resembles snowflake crystals and is governed by the same diffusionlimited aggregation mathematics. The transmitted light renders the thick central region as an opaque white mass, with the dendritic growth arms at the periphery showing varying translucency that reveals the colony thickness gradient.
