• 한국미생물·생명공학회지
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• 제17권2호
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• pp.131-135
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• 1989

Effects of the inoculum size of testing organism and pH of the plate and the concentration of agar were investigated for the selection of high kasugamycin producing mutants of Streptomyces kasugaensis ATCC 15114. For the detection of high kasugamycin-producing mutants, both concentrations of agar and test organism were optimized at the concentrations of 2% and 0.35 (A$_{550}$), respectively. The pH 7 was optimum for both growing the testing organism, Pseudomonas fluorescens IFO 12180, and for obtaining more promising mutant strains of S. kasugaensis. Under these conditions, mutants had been isolated which, tested later in liquid cultures, gave higher kasugamycin yields than that of the parent strain.

• Fisheries and Aquatic Sciences
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• 제6권3호
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• pp.135-139
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• 2003

During routine survey of Pacific oyster (Crassostrea gigas) collected from Tongyoung area in southern coast of Korea, histological examination revealed that a intracellular microorganisms infected the digestive gland of the oyster. They infected hepatopancreatic cells extensively. The size of intracellular microorganism was of 45 to 86nm in diameter and 200nm to more thar 500nm in length. They were pleomorphic. The morphological characteristic of intracellular microorganisms lacked cell wall and was bounded by the plasma membrane. They contained typical prokaryotic ribosomes and fibrillar DNA-like strands. No additional internal structure has been observed. Based on the lack of cell wall and the cellular localization, the intracellular microorganism is considered as a Mycoplasma-like organism.

• 대한가정학회지
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• 제40권4호
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• pp.73-84
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• 2002

This study found out the consumers' awareness and information-seeking behaviors towards Genetically Modified Organism(GMO). Data were collected from 506 adults in Seoul, Daegu, and Busan by the self-administered questionnaire. Frequencies, Pearson's correlation and multiple regression analyses were conducted by SPSS Windows. The resets of this study were as follows: (1) the concerns and the need for information about GMO were high, but recognition was low, (2) the factor affecting the need for information about GMO was the concerns about GMO, and (3) sex, age, the need for information about GMO, and subscription experience of consumer journals were the factors affecting the information-seeking behaviors.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회B
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• pp.2816-2821
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• 2008

This paper investigates the flow field and organism concentration in a UV disinfection channel in which vertical ultraviolet lamps are arranged in a staggered configuration. Turbulence is described by low Reynolds number ${\kappa}-{\varepsilon}$ turbulence model and standard ${\kappa}-{\varepsilon}$ turbulence model, respectively. P-1 method has been employed to solve the radiative transfer equation. The obtained incident radiation is used to compute the inactivation term in the species equation. The CFD results are in good agreement with the existing experimental data for the UV channel. For the flow field, the low-Reynolds number ${\kappa}-{\varepsilon}$ model is superior to the standard ${\kappa}-{\varepsilon}$ model. The approach velocity has a significant effect on the disinfection efficiency. The organism concentration at the outlet decreases fast to a low inlet velocity.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2001년도 추계학술발표대회
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• pp.902-905
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• 2001

This study was carried out to investigate the sanitary conditions for foods providing in food service facilities such as convenience stores, flour stores, resting places in expressway and fast food stores in Kwang-ju city from May to September 2001. The samples were kimbabs and hamburgers, and were tested for indicative microorganism and food poisoning organism. and food poisoning organism.

• 대한수의학회지
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• 제19권2호
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• pp.135-141
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• 1979

1. In the present experiment, necrotic myocarditis were produced only in suckling mice but also in weanlings or young adult mice by intraperitoneal inoculation with the Tyzzer's organism KK of cat origin, whereas the organism MSK from the mouse was not capable of producing such lesions. 2. Significant difference in pathogenicity for 1-to 6-week-old mice was demonstrable between the two organisms after intraperitoneal inoculation without cortisone.

• 기술사
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• 제33권5호
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• pp.53-58
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• 2000

Hydrate minerals are contain H$_2$O to offer a place for our health and life of living organism. I wish to present a hypothesis to explain the mechanism on which every living organism survives, gets sick and recovers again Hydrate minerals are the very prerequisite for all animals and the welfare of mankinds. Hydrate minerals are used to the main medical stuffs, the meterials for water purification and porous meterials for bio-ceramic and bio-plastic industries

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.1005-1010
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• 1989

A refined version of automatic micro-organism recognition and identification method, 'O.I.S.M.2' is proposed in this paper, using image processing based on an expert system. This proposed method is based on the segmentation of the organism image, characterizing segment features, which are independent of individual size and length. Complicated shapes of organisms are divided into basic shape segments defined in this paper such as lines, circles, ovals etc. Organisms can then be expressed simply in a set of segments, regardless their individual differences.

• 미생물학회지
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• 제16권4호
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• pp.155-160
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• 1978

Nutritional requirements for the growth of Cellulomonas flavigena were studied. C. flavigena grew well on cellulose when 0.005% or more of yeast extract was present in the growth medium. The growth factor in yeast extrct was, in part, thiamine and biotin. Amino acids had little effect on the growth on the organism. The extent of growth on yeast extract was much higher than that obtained on those vitamins, which indicates the presence of growth factors in yeast extract besides the vitamins, among the carbohydrates tested, the organism grew best on glucose and galactose, and the optimum N/P ratio was within the range of 0.75~3.17.

• 한국해양학회지
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• 제3권1호
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• pp.8-15
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• 1968

An interesting bacterium (#271) was isolated from the abyssal plain of the Sigsbee Deep of the Gulf of Mexico. The organism exhibits marked polymorphism (baciloid, coryneform and myceloid morphologies) in response to certain cultural conditions. the organism has been observed undergoing reproduction by transverse fission, fragmentation and arthrospore production. The presence of arthrospores indicates the bacterium is a member of the genus Arthrobacter; however, computed affinity coefficients do not confirm this genus. Until further studies have been completed on this isolate the authors are reluctant to place it in a generic group.