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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Korean Journal of Microbiology
Journal Basic Information
Journal DOI :
The Microbiological Society of Korea
Editor in Chief :
Volume & Issues
Volume 15, Issue 4 - Dec 1977
Volume 15, Issue 3 - Sep 1977
Volume 15, Issue 2 - Jun 1977
Volume 15, Issue 1 - Jan 1977
Selecting the target year
Amylase Production by Continuous Cultures of Aspergillus oryzae and its Mutants
Han, Hong-Eui ;
The Korean Journal of Microbiology, volume 15, issue 2, 1977, Pages 63~76
Irradiation with high doses of gamma rays induced the reduction of mycelial weight and anaylase activity, and increased relative amylase activity in surface cultures. Biphase in growth curves was shown in aeration-agitation cultures but the behavior of the first phase of growth could be eliminated by replacing the amylasehydrolysed starch substrates, so that enzyme production was shortened ca. 40 hours and relative amylase activity was increased about 3 times higher before onset of autolysis. In the effect of gibberellin on amylase production, the positive stimulation was appeared to only surface culturs of the liquid medium and the negative effect to shake-cultures in a mutant. Trials of various continuous culture were resulted not only the approalch to the value of amylase activity in surface cultures of liquid medium, but also higher productivity than in batch cultures. The culture-degeneration was observed in two-stage continuous culture, but did not appear in continuous elevation culture.
Studies on the Epiphytic Yeast in Seaweeds
The Korean Journal of Microbiology, volume 15, issue 2, 1977, Pages 77~84
The yeast population on 14 species of seaweeds and in water estimated by cultural mothods over a 5-month period in south-west in Korea, Nine species of yeasts, comprising unidentified one, and one of yeast-like fungi were identified. Fifty phycase were attributed to the difference of cultural method between the present work and earlier repoeters and, to some exent, the higher number of Rhodotorula glutinis which had a prior adaptation to the release of inhibitory polyphenolic materials. Although, to what extent, all division of algae showed a similar variation in yeast population, correlated with month, the rapid decrease of yeast population in August seems to be the cause of exposure of heat irradiation in this month. The cultural estimate of per se fltration without double filter and one of unidentified species are discussed.
Radiosterilization of Medical Producys(IV)
The Korean Journal of Microbiology, volume 15, issue 2, 1977, Pages 85~92
We have in vestigated on physico-chemical and biological test of plastic transfusion set which was manufactured from the three companies after
. The results obtained were as follows ; 1) In physico-chemical test generally showed a tendency to decrease of pH and tensile strength, and increase of oxidizable matter, phosphoric acid-phosphosphate and heavy metals in its eluted solution by irradiation of 2,5 Mrad. 2) In biological test including toxicity and safety test were passed but indicating haemolysis range the haemolysis test were failed to pass from 30% to 50%. 3) We have found that the raw materials of plastic transfusion set according to manufactures are all different and especially the most radioresistant raw material wss found in the product which was manufactured from C company.
On the Isolation of Antibiotic Producing Streptomyces spp. from Soil
The Korean Journal of Microbiology, volume 15, issue 2, 1977, Pages 93~99
Among the Streptomyces isolated from soil, two strains which have antibacterial activity aginst various pathogenic bacteria are identified as Streptomyces globosus and Streptomyces albus subsp. according to I.S.P. methods and Bergy's Manual of Determinative Bacteriology. Morphological and physiological characteristics of them on several media were observed. Antibiotics from S. albus subsp. or S. globosus was identified asw tetracycline or streptomycin-like substances respectively by the paper chromatographic behavior in eight solvent systems of V. Betina. And it was revealed that these antibiotic substances are stable to temperature and weak acid.