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The antibacterial activity test galanga (Alpinia galangal) on the growth of becteria Bacillus subtilis and Escherichia coli

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Published under licence by IOP Publishing Ltd
, , Citation C S Rini et al 2018 IOP Conf. Ser.: Mater. Sci. Eng. 420 012142 DOI 10.1088/1757-899X/420/1/012142

1757-899X/420/1/012142

Abstract

This research was conducted to test the effectiveness of antibacterial inhibition of galangal (Alpinia galanga L.) on the growth of Escherichia coli and Bacillus subtilis bacteria with concentration 0%, 15%, 30%, 45%, 60%, 75%, 90%, 100 %. The method used in this study with the Kirby-bauer disc diffusion method with 0% concentration as negative control. The results showed that galangal (Alpinia galanga L.) at 100% concentration had the highest inhibition area in Bacillus subtilis (1,13 mm) and E. coli (0,8 mm). Galangal has more effective antibacterial activity in Bacillus subtilis bacteria than E. coli.

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10.1088/1757-899X/420/1/012142