• The Korean Journal of Mycology
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• v.21 no.2
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• pp.94-105
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• 1993

The genus Cordyceps known as an insect parasite forms a sclerotium in insect bodies and then produces perithecia on the single or multiple stromata produced from sclerotium. Collected Cordyceps were identified into 5 species: Cordyceps militaris, C. nutans, Cordyceps sphecocephala, Isaria japonica, and Torrubiella sp. The fruit bodies of Cordyceps in petri-dish cover were fixed by tape and put the lid on water agar plates to isolate these collected Cordyceps. The germinated spores were transferred from water agar to Potato dextrose agar(PDA) after six hours. Mycelial growth of C. nutans and C. militaris was the most successful on Hamada media and was also good on Complete media and PDA. Mannose as a carbon source was good for two species and Glutamic acid as a nitrogen source was satisfactory to C. militaris and Asparagine gave a good result to C. nutans. C. militaris and C. nutans showed similar mycelial growth rate on the media that contained thiamine-HCI, biotine or nicotinic acid as a vitamine. When conidia of C. nutans were inoculated to insects, mortality was high in Artogeia napi L, Hemiptera, Plutella xylostella and 50% in Orthoptera, 12% in Acantholyda posticalise M, but not Agelastica coerulea B. in Aphididae, C. nutans was collected from only Hemiptera in nature, but killing effect on other insects was proved. Mycelial growth and fruit-body formation were good on the media that consist of rice powder 5g, wheat flour 5g, water 100ml, but formed fruit-body was not complete stromata but a mass of conidia according to results of observing microscope.

• Food Science and Preservation
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• v.6 no.1
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• pp.92-98
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• 1999

Contents of formed higher alcohols did not change about at 20 ppm of total nitrogen, but the contents were most at 200 ppm of total nitrogen especially in iso-amyl alcohol, and the contents showed decrease above at 400 ppm, greatly. Higher alcohols formation were high content at pH 4.0, but the contents were increase according to the condition of glucose and sucrose much. The formation of higher alcohols showed less in fermented condition of no elimination sample than in eliminated a mineral in each. Contents of higher alcohols were less in eliminated sample of biotine and inositol than in control, but the contents were higher than the others, and the contents showed especially high in eliminated nicotinic acid and thiamine. Higher alcohols formation were most at the content of SO\ulcorner in 20 ppm of them. The formation of higher alcohols showed more in Saccharomyces cerevisiae was form more in higher alcohols than Saccharomyces bayanus of two yeast strains.