Bacterial inactivation of Bacillus subtilis using microwave atmospheric pen plasma (APP)

Authors

Jenica Rozette Uy ⋅ PH National Institute of Physics, University of the Philippines Diliman
Joey Kim Soriano ⋅ PH National Institute of Physics, University of the Philippines Diliman
Camille Faith Romero ⋅ PH National Institute of Physics, University of the Philippines Diliman
Leo Mendel Rosario ⋅ PH National Institute of Physics, University of the Philippines Diliman
Henry Lee ⋅ PH National Institute of Physics, University of the Philippines Diliman
Julie Anne Ting ⋅ PH National Institute of Physics, University of the Philippines Diliman
Henry Ramos ⋅ PH National Institute of Physics, University of the Philippines Diliman
Maria Auxilla Siringan ⋅ PH Microbiological Research and Services Laboratory, Natural Science Research Institute, University of the Philippines Diliman
Roy Tumlos ⋅ PH Department of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Manila

Abstract

Food processing industries rely on the efficiency of their bacterial inactivation techniques. The ability to ensure that their products are sterile and free from bacteria prevents possible cases of spoilage. This study investigates the efficiency of bacterial inactivation of Bacillus subtilis using the atmospheric pressure pen plasma (APP). Samples include polypropylene materials and laurel leaves that are inoculated with Bacillus subtilis cells and exposed to the microwave atmospheric pen plasma with 250 W absorbed microwave power at varying Ar/N₂gas flow rate ratios and exposure times. Bacterial inactivation using the microwave-induced atmospheric pen plasma resulted to a significant decrease in the microbial population of Bacillus subtilis using D-value as the biological indicator for the feasibility of the technique.

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Issue

2012: Proceedings of the 30th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2012-2B-3

Section

Plasma Physics

Published

2012-10-22

How to Cite

[1]

JR Uy, JK Soriano, CF Romero, LM Rosario, H Lee, JA Ting, H Ramos, MA Siringan, and R Tumlos, Bacterial inactivation of Bacillus subtilis using microwave atmospheric pen plasma (APP), Proceedings of the Samahang Pisika ng Pilipinas 30, SPP2012-2B-3 (2012). URL: https://proceedings.spp-online.org/article/view/SPP2012-2B-3.