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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 18, Issue 4 - Dec 1980
Volume 18, Issue 3 - Sep 1980
Volume 18, Issue 2 - Jun 1980
Volume 18, Issue 1 - Mar 1980
Selecting the target year
On a highly proteolytic mutant strain of Aspergillus flavus
The Korean Journal of Microbiology, volume 18, issue 2, 1980, Pages 51~58
Mutational experiments were performed to improved to improve the protease productivity of Aspergillus flavus KU 153, which is selected among the wild strains. A UV-induced mutant strain having high protease productivity was obtained by the use of the clear zone method as a simple criterion for a primary screening test. Neutral and alkaline protease activities of hte mutant strain were higher than 1.8 times, comopared with those of the parental strain, respectively, while in the case of acid protease, it was 2.7 times. The mutant strain selected was more powerful in the production of cellulase and amylase, as well s protease in wheat bran, compared with those of the parental strain. protease production of the parental strain has reached maximum level at 3 days culture, while alkaline nad neutral protease production of the mutantstrain has reached at 2 days culture. On the other hand, the mutant strain formed the spore slowly, compared with the parental strain. Column chromatography of the neutral protease on DEAE-Sephadex A-50 showed that the mutant strain was not induced the formation of another neutral protease isozyme, but induced the variation in the function of regulatory gene.
Production of Fructose Corn Syrup by Glucose Isomerase
The Korean Journal of Microbiology, volume 18, issue 2, 1980, Pages 59~66
Two strains S-P and S-P-2, both Streptomyces sp., have been isolated and were found to have relatively high specific enzyme activity compared to other organisms reported. The specific activity of the enzyme produced from these two strains were 0.25 and 0.2 international units respectively. The productivity of the enzyme achieved was about 50 IU/l/hr. Glucose isomerase form these strains was found to be stable under the temperature of heat treatment (at
) for fixation of enzyme inside the dell. This organism has an advantage in that it did not require toxic metalic ion for enzyme activity and could utilize xylan in leu of xylose as an inducer. The optimal temperature and pH of enzymatic reaction purpose of using these data for the optimal operation and designing of enzyme reactor system. The reaction mechanism was found to follow the single substrate reversible reaction kinetics. The kinetic constants determined experimentally are :
Studies on the Group A Hemolytic Streptococci in School Children : The Occurrence and Susceptibility to Antobiotics
The Korean Journal of Microbiology, volume 18, issue 2, 1980, Pages 67~72
this paper presents the findings of a study in which throat cultures was ontained from all grade of primary school surrounding Seoul area. The number and percentages of children with positive throat cultures of streptococci were 181 cases (9.4%) among 1914 cases. Group A streptococci composed 4.3% (83 cases) of betahemolytic streptococci recovered. A total of 181 strains of group A streptococci were tested for susceptibility to 21 anibiotics in vitro. The strains were almost equally sensitive to most of the individual antibiotics : all of the group A strains were uniformly susceptible to bacitracin ; 93.6% to ampicillin ; 82.3% to erythromycin. The susceptibility to colymycin to colymycin and kanamycin were not found.
Taxonomical Studies of Genus Trichoderma in Korea
The Korean Journal of Microbiology, volume 18, issue 2, 1980, Pages 73~90
Ninerty one of Trichoderma spp. were isolated from ginseng growing bed, dead trees and muchroom in Korea from March 1978 to June 1979. Six species were identified as T. hamatum(13 strains), T, roningii(17 strains), T. aureoviride(4 strains), but other six strains(strain No. 111, 125, 127, 130, and 503) unidentified by Rifai's key. The reason which is not identified is as following. According to Rifai's key, phialid, phialospore and colony's colour of four strains (strain No. 125, 126, 127 and 130) are like T. longibrachiatum, but they are different from Rifai's method, because sterile-hypha often appears. the fature of standard strain ATCC no. 13631 T. longibrachiatum is like ster9ile-hypha that is used strains in this experiment. The morphology of strain No.503 is the same as T. hamatum except phialospore. Gnerally, T. hamatum's phialospore is subcylindrical, but strain No. 503 is regular ovoid. Therefore, strain No.503 cannot be identified by Rifai's key. The property, strain No.111's phialid is very irregular
) and its phialospore
) is subcylindrical, is uncomfortable to Rifai's method. The standard strains used in this experiment are 7 kinds of Trichoderma spp. received from ATCC.
Hyphomycetes from Korean Soil. I. The Genus Penicillium with a Teleomorphic State Eupenicillium javanicum.
Kyung Hee MIN ; Hong Soon Woo ; Tatsuo YOKOYAMA ;
The Korean Journal of Microbiology, volume 18, issue 2, 1980, Pages 91~103
A mycological survey was carried out with the soil samples collected in Korea from Sptember, 1978 to December, 1979. Special attention was paid fungus genus Penicillum. One hundred twenty three isolates, as a result, were obtained from the Korean soils. Among these, sixteen species were iedentified and described in this paper. Almost all of the fungi reported here are new to Korea. One of them is an asomycete cleisothecia of
in diameter. Ascospores of this fungus were found lenticular with an equatorial furrow as indicated in the previous descriptions.
Hyphomycetes from Korean Soil. II.
Kyung Hee MIN ; Hong Soon Woo ; Tatsuo YOKOYAMA ;
The Korean Journal of Microbiology, volume 18, issue 2, 1980, Pages 104~114
Fourteen species of the hyphomyceteous fungi isolated from Korean soils are described and illustrated. Among these, one species has teleomorphic state and is identified as Emericella nidulans var. nidulans, similar to Emericella spectabilis with the exception of size of the conidiophores as well as color and the arrangement of the hulle cells. Four species of hyphomyceteous fungi. Chrysosporium pannorum, Doratomyces microsporus, Trichoderma Roningii, T. viride, are reported here for the first time in Korea.