Perubahan Morfologi Sel dan Kemampuan Fermentasi Saccharomyces Sp. Isolat Daging Buah Durian (Durio Zibethinus Murr.) yang Diradiasi Dengan Sinar Ultraviolet

Abstract

The research of “The Effect of Ultraviolet Light to the Morfology Structure of Saccharomyces sp. Isolated from Durian (Durio zibethinus)” has been conducted from Mey 2009 to November 2009 at Genetics’ Laboratory and Microbiology Laboratory Faculty of Mathematics and Natural Sciences, University of Sumatera Utara, Medan. The aim of this study is to determine the influence of length and intensity of ultraviolet to morphology colony, cell growth and the ability of the yeast ferment sugar. Treatments are, ultraviolet light intensity 0, 20, 30, 40 Watt and period of light 0, 30, 40, 50, 60 seconds. The parameter that were observed are morphology colony and sugar reduction concentration. The result indicated that ultraviolet light of 20 watt and period 50 second the lowest sugar reduction is 12.95 mg, compared to control 17.72 mg, where as the highest sugar reduction was 40 Watt light intensity and period 40 second which was 27.72 mg.