Escherichia coli activity characterization using a laser dynamic speckle technique

Autor:	Ramírez-Miquet, Evelio E., Martí-López, Luis, Contreras-Alarcón, Orestes R.
Rok vydání:	2012
Předmět:	Physics - Optics Physics - Biological Physics
Zdroj:	Rev. Cub. Fis. vol. 28 No.1E (2011) pp. 1E13-1E17
Druh dokumentu:	Working Paper
Popis:	The results of applying a laser dynamic speckle technique to characterize bacterial activity are presented. The speckle activity was detected in two-compartment Petri dishes. One compartment was inoculated and the other one was left as a control blank. The speckled images were processed by the recently reported temporal difference method. Three inoculums of 0.3, 0.5, and 0.7 McFarland units of cell concentration were tested; each inoculum was tested twice for a total of six experiments. The dependences on time of the mean activity, the standard deviation of activity and other descriptors of the speckle pattern evolution were calculated for both the inoculated compartment and the blank. In conclusion the proposed dynamic speckle technique allows characterizing the activity of Escherichia coli bacteria in solid medium. Comment: 5 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1209.3390 Zobrazit plný text záznamu View this record from Arxiv