A NOVEL METHOD OF LASER EFFECTING GROWTH OF PENICILLIUM CHRYSOGENUM AND PENICILLIUM EXPANSUM TREATED WITH BORIC ACID AND COLORED WITH GENTIAN VIOLET AND METHYLENE BLUE
Abstract
Culture of P. chrysogenum and P. expansum were isolated from wood surfaces and treated with different concentrations of boric acid (1% and 2%), colored with gention violet and methylene blue and exposed to He-Ne laser light with absorbed doses of 1.06 and 2.12 joules/cm2respectively and survivors enumerated. The maximum inhibition (for 6min.and 2%boric acid concentration)of P. chrysogenum and P.expansum were 92.2 % and 90 % for coloring by Gentian Violet respectively. While the inhibition of these fungi for coloring by Methylene Blue were 85.5% and 87.7 % respectively.
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