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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 3, Issue 2 - Oct 1965
Volume 3, Issue 1 - Apr 1965
Selecting the target year
Withes Broom of Jujube Tree, Zizyphus jujube Mill, Var. inermis Rehd.(Part.3)
The Korean Journal of Microbiology, volume 3, issue 1, 1965, Pages 1~6
Over a period of 1962-64, a transmission-experiment of witchess' broom of jujube tree by stem-grafting was conducted. When stem-grafting of sound scions upon diseased roots or diseased scions upon sound roots were carried out, disease transmission of high rate was witnessed; 99% in the former and, in the latter, 62% of the stocks which saw union by callussing and had new shoots. Even when the diseased scions by stem-grafting or the diseased buds by budding upon sound stock died away, the transmission rate was 21% in stem-grafting and 14% in budding which seems to show that, when tissues of diseased plants and stocks are kept contacted over a certain period, the disease transmission occurs. And when the recovered scions taken from once diseased tree were grafted upon diseased roots, the transmission rate was 100 % and therefore it is presumed that the immunity could not be acquired even under the assumption of complete recovery from the disease. In stem-grafting of the diseased scions upon sound roots, 98% of the scions which were stored in the cellar, overwintered and grafted in spring was diseased, whereas the disease rate of the scions which were cut and grafted in spring was only 33%. It was particularly noteworthy that 90% of the scions in the former case and only 3% in the latter case were diseased as of June 18th approximately 2 months after the actual grafting and then the latter advanced to 33% with the passage of time. It appears that the pathogen in branches and shoots of the diseased trees standing outdoors become inactivated or diminished during winter. Through its symptom, pathological change in tissue, and easy transmission of the disease via stem-grafting, it seems certain that the pathogen of the witches broom disease in jujube tree is a virus.
Studies on Microdiogical Standards of Foods. (Part. 2)
The Korean Journal of Microbiology, volume 3, issue 1, 1965, Pages 7~10
Higher number in colony counts in coliforms, total aerobes, and anerobes was obtained from marketable soy-bean mash than front that in fermented tank. The ratio between coliform contamination and total viable cells was higher in red pepper mash than in soy-bean mash. E. coli, contaminated in soy-bean mash persisted longer at low temperature (
) than at room temperature and they vanished after seven days of storage at room temperature. At 30.deg.C and 35.deg.C, these organisms were more effected than at room temperature. E. coli cells, inoculated in red pepper mash, were not recovered at room temperature after five days incubation. Soy-bean mash, completely fermented at normal conditions, were detected to contain
organisms per gram of sample. On the contrary, marketable soy-bean mash were found to have more than 10
per gram samples. Since samples were found to have more than
aerobes and anaerobes per gram, contamination of coliforms seemed to be apparent.
Studies on Thermal Resistance Bacteria. (Part. 1)
The Korean Journal of Microbiology, volume 3, issue 1, 1965, Pages 11~14
The purpose of this paper is to study on the morphological and physiological nature generally observed for the identifications, and the four strains of thermal resistanting aerobic bacteria isolated from swelled cans and the different soils collected from the wide area in Korea. The results obtained in the light of the Bergey's Manual for the identification of the bacteria, have been shown that the four strains of bacteria are pertained to Bacillus subtilis. The optimum temperature, pH and the thermal resistance (2.5 min. at
) of the bacteria have been measured.
Studies on the Antifungal Action of Leather in Korea.(Part. 1)
The Korean Journal of Microbiology, volume 3, issue 1, 1965, Pages 15~17
The list of fungi which may be found on leather has already grown to over fifty fungi. Strains of Aspergillus, Penicillium and Paecilomyces appears to be the most common ones. However, there had been no studies concerning the antifungal action of leather in Korea. Therefore the authors attempt to isolate the strains of fungi from leather. In this study, the strains of Aspergillus niger, glaucus and oryzae were isolated respectively out of leather, then it was identified eachly. These strains of fungi could grow in the presence of fat and oils, it is obvious that leather-mildew utilize fat and oils of leather-products as a carbon-saurce.
Studies on the Antifungal Action of Leather in Korea (Part. 2)
The Korean Journal of Microbiology, volume 3, issue 1, 1965, Pages 18~23
It seems like that the characteristics and drug-resistances of fungi are respectively different in various circumstances. Scores of chemicals were applicated to the leather-fungi in this study. M-dinitrobenzene, 2, 4-dinitrochlorobenzene and phenyl mercuric acetate inhibited the growth of Aspergilli which were isolated from Korean-leather. The minimum fungicidal limits of p-nitrophenol, 8-hydroxyquinoline and sodium-pentachlorophenolate against the Korean-originated strains are different from that of other country. In the mass-screening of fungicides, artificial "Leather-extracts media" have been designed and used, and the media contributed to screening-tests. Fat and oils which are the materials of fat-liquoring in leather manufacture affects the drugresistance of the leather-fungi. It is found that the accelerating-method on malt-agar plate is effective to determinate the fungicidal action of chemicals in short time.hort time.
Studies on The Physiological Races of Phytophthera Infestans on Patatoes
The Korean Journal of Microbiology, volume 3, issue 1, 1965, Pages 24~26
In July, 1963, a virulent outbreak of late blight in the potato field of Daekwanlyung area was studied and it was known as epidemics. Two stocks are
of Phytophthora infestans (Mont.) De Bary which isolated from Irish Cobbler were inoculated at field and green house respectively by cutted leaves method. Two strains have been distinguished in reactions to leaves:
: Irish Cobbler (r), Morin No. 1 (r) have shown infectivity of disease and Kennebec (
), 1512-C(16) (
), Pentland Ace (
) and Hokkai No. 17 (
) have not shown infectivity of disease;
: Irish Cobbler (r), Norin No. I (r) and Kennebec (
) have shown infectivity of disease and 1512-C (16) (
), Pentland Ace (
) and Hokkai No. 17(
) have not shown infectivity of disease. Both are the first record of race O and race 1 of Phytophthora infestans (Mont.) De Bary in Korea.