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Journal : Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati

Dominansi dan Seleksi Jamur Aspergillus Perusak Gaplek H. A. Oramahi; Christanti Sumardiyono; Nursamsi Pusposendjojo; Haryadi Haryadi
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 1 (2010): February 2010
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v15i1.2646

Abstract

Dried cassava is a suitable host for the growth and development of the genus Aspergillus. Fungi reported to grow on dried cassava were A. clavatus, A. flavus, A. foetidus, A. fumigatus, A. niger, A. ochraceus, A. oryzae, A. tamarii, A. zonatus, dan Aspergillus sp. From those species, A. flavus is the most important species because of its toxigenic characteristic on agricultural product. This study was conducted to study dominant species of Aspergillus causing the most severe deterioration on stored dried cassava and causing the highest deterioration in dried cassava. The isolates were then cultured for determination of dominant species. The in vitro experiment was to obtain the species of Aspergillus that is resulted in highest change of dried cassava spoilage. Based on relative index frequency (Rif) and presence index of the fungus (Pif), A. flavus was the most dominant species and causing the highest deterioration on the dried cassava.
Pengaruh Lengas Nisbi dan Suhu terhadap Kerusakan Gaplek Akibat Aspergillus flavus Selama Penyimpanan H. A. Oramahi; Christanti Sumardiyono; Nursamsi Pusposendjojo; Haryadi Haryadi
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 2 (2010): June 2010
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v15i2.2723

Abstract

A study on the spoilage of dried cassava by Aspergillus flavus was still limited so that such study is very important to do. This experiment was done to examine the effect of relative humidity (RH) and storage room temperature on the development of A. flavus and dried cassava spoilage during storage time. Based on the population of A. flavus, starch content, reduction sugar content, and water content of dried cassava, it was concluded that RH 65%, the temperature of 30 and 35oC had better storage condition for dried cassava because it resulted in the lowest population of A. flavus and the lowest deterioration of dried cassava.