• Journal of Ocean Engineering and Technology
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• v.13 no.4 s.35
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• pp.124-131
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• 1999

In this paper, we show the numerical and experimental results of two-dimensional fluid motions inside a rectangular container with a vertical plate subjected to a background rotation added by a rotational oscillation. In the PIV experiment we apply a new algorithm, NTSS, to the velocity calculation. In the numerical computation, the linear Ekman-pumping model was used to take the bottom friction effect into account. It was found that it showed good agreement with the experimental results at low ${\epsilon}$ number.

• The Korean Journal of Mycology
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• v.23 no.4 s.75
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• pp.310-317
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• 1995

The evolutionary relationships for 43 species in the taxa of the basidiomycetous yeast and related yeast-like fungi have been studied from the 43 18S rRNA partial sequences. Fibulobasidium inconspicuum showed a relatively close relationship to Filobasidiella neoformans. It is obvious that Tremella foliacea and Ustilogo rabenhorstiana form a independently different cluster from basidiomycetous yeast and seem to be phylogenetically distant from basidiomycetous yeast and each other. The basidiomycetous yeasts are believed more closely associated with Tremella foliacea than with Ustilago rabenhorstiana. The phenotypic criteria such as carotenoid pigments, teliospores, ballistospores seems not to be phylogenetically useful indicators.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.251-252
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• 2000

해산어류는 담수어나 육상의 포유동물과는 달리 사료내의 18탄소 전구체의 지방산에서부터 충분한 양의 필수지방산을 생합성할 수 없기 때문에 사료를 통하여 이들 성분을 공급해야만 한다(Yamada, 1980). 최근에는 사료 내에 필수지방산의 한 종류인 EPA(20:5n-3)가 충분히 함유되어 있다고 하더라도 DHA(22:6n-3)로 전환되는 속도가 늦기 때문에 해산어 자치어의 DHA요구를 충족시킬 수가 없다는 것이 밝혀지고 있다(Bell, 1995; Sargent, 1997). (중략)

• The Korean Journal of Mycology
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• v.20 no.2
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• pp.166-168
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• 1992

The original descriptions of five species of the Genus Inoeybe were translated into Korean.

• The Microorganisms and Industry
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• v.19 no.3
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• pp.53-56
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• 1993

식물 발효식품은 발효대상이 되는 식물의 기능성에 발효미생물의 기능성, 또는 기타 발효산물의 기능성이 가미된 것으로 그 범위는 대단히 넓다. 그러나, 국내에 소개된 것은 복합야채를 착즙하여 mixed culture한 제품, 알로에즙을 이용한 발효제품, 각종 과육 및 야채의 혼합발효제품 등 10여가지 품목이 유통될 뿐이다. 이러한 시점에서 식물발효식품의 역사, 식물엑기스 발효식품의 영양학적 중요성, 각종 식물엑기스의 유용성분 및 앞으로의 가능성을 예측해 보고자 한다.

• The Korean Journal of Mycology
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• v.2 no.1
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• pp.15-19
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• 1974

A severe ginseng root rot disease was occurred and became widespraed in 1973 affecting the ginseng cultivating plot around Kangwha and Gimpo-Gun of Kyunggi province. Soil samples were collected from the area of Wolgot-Myun, Gimpo-Gun, Kuunggi-Do, 1974. We examined general fungi and Fusarium sp. in soil layers and also in different kinds of soil of respective diseased, uncultivated and healthy areas, and found the following results. 1. In the diseased and uncultivated area, the content of moisture, organic matter and silt was greater than in the healthy area. 2. Contray to the above, the healthy area contained a greater amount of inorganic elements such as $P_2O_5$, K,Ca and of soil particle such as Cs and Fs. The degree of pH and content of Mg were even in the three types of soils. 3. General fungi were found in abundance in the diseased and uncultivated soils. It was observed that in all types of areas, general fungi reside in abundance in the rhizosphere, i.e., 10-15cm layers and that the closer the surface, the greater the numbers of fungi. 4. A great number of Fusarium sp. was found in the uncultivated area, and followed diseased and healthy areas. It was observed that in all types of areas, Fusarium sp. distributed in abundance in rhizosphere and that the closer the surface, the greater the numbers of Fusarium sp., with the numbers decreasing as the soil layers increase.

• The Korean Journal of Mycology
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• v.19 no.2
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• pp.109-119
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• 1991

The vertical distribution of the fungal population for the soil samples from two sites of producing and nonproducing of Tricholoma matsutake, song-yi mushroom, were examined at Yang­yang and Myung-joo, Gangweon province. By the dilution plate method, a total number of propagu­les of fungi per gram of soil was observed to be low at the song-yi producing sites but high at the song-yi nonproducing sites under the communities of Pinus densiflora. The tendency of the number of fungal propagules were decreased with the increasing vertical depth. In the incuhation method at $42^{\circ}C$, six genera and nineteen species of the fungi were isolated from two sites; Aspergillus fumigatus, Acremonium sp., Talaromyces stipitatus, Penicillium lilacinum, P. oxalicum and Westerdykella multispora. The most dominant species by this method was A. fumigatus. From heat treatment method at $70^{\circ}C$, seven genera and nineteen species were isolated; Aspergillus fumigatus, Alternaria alternata, Neurospora sitophila and Mucor sp.. In the ethanol treatment method, one genera and one species was isolated Mortierella sp.. From the three isolation methods, it was found that the total number of the soil fungi and the frequency of species appeared were the highest at the soil of upper layer whereas the lowest at the soils of lower layer in its vertical distribution.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.25 no.5
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• pp.680-687
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• 2001

In this study, spin-up flows in a rectangular container are analysed both numerically and experimentally. In the numerical computation, we use two Ekman pumping models, the classical leading order and the first order. We also compared our results with those obtained for the case without a pumping model. Effect of two parameters, Reynolds number and the Rossby number on the flow evolution is studied. The first order and the leading order Ekman pumping models are in good agreement with the experimental result compared with the non-Ekman pumping model. Attention is given to the merging of two cyclonic vortices.

• Microbiology and Biotechnology Letters
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• v.8 no.4
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• pp.229-235
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• 1980

Pectin transeliminase (PTE) was produced by Saccharomyces cerevisiae, Schizosaccharomyces pombe 4683, and Aspergillus niger in the media containing 2% pectin and examined for its characteristics. The Production of the enzyme was higher by Asp. niger than by the two yeast strains, showing that the PTE activity was proportional to reducing power. The enzyme was proved to reduce pectin and produce 4, 5- unsaturated galacturonic acid. The optimum activity of the PTE was found to be at pH 6.0 and $50^{\circ}C$. The activities of these enzyme were stable below $50^{\circ}C$ but decreased at the higher temperature. Substrate inhibition of the PTE activities was appeared at high concentrations of pectin. Those PTE activities were increased under 0.6M of KCI and NaCI, but that maximal activities at the concentration of 0.2M MgC $l_2$.

• The Korean Journal of Mycology
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• v.13 no.1
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• pp.53-55
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• 1985

To determine contents of inorganic elements of Ganoderma lucidum (Fr.) Karsten, the horn-shaped carpophores and the pileus of Ganoderma lucidum were incinerated and analyzed by inductively coupled plasma atomic emission spectrophotometry. The ash contents of the pileus and the horn-shaped carpophore were 1.48 and 1.40 % respectively. The pileus contained calcium, magnesium, sodium, manganese, iron, zinc and germanium in that order. The horn-shaped carpophore contained magnesium, calcium, zinc, manganese, iron, copper and germanium in that order.