• Title/Summary/Keyword: Mold Growth

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Characteristics of Red Mold Isolated from Traditional Meju (전통메주에 증식하는 붉은 곰팡이의 특성)

  • 이상원;박석규;김홍출
    • Food Science and Preservation
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    • v.8 no.2
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    • pp.199-205
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    • 2001
  • Red mold was isolated from meju prepared by traditional mtehod and characterized. The isolated red mold grew well on potato dextrose agar medium, In microscopic observation, it had a septum in mycelium and ellipsoidal spore. Optimal temperature and pH for growth were 30$\^{C}$ and 6.0, respectively. Enzyme activities such as protease, a-amylase and glucoamulase in ted mold were lower than those in Aspergillus oryzae. A competitive growth between red mold and Asp. oryzae was greatly affecten by cultivation temperature. The growth of isolated red mold on meju was predominant at below 30$\^{C}$ as compared with Asp. oryzae.

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Growth Inhibition Effect of Environment-friendly Agricultural Materials in Botrytis cinerea In Vitro (친환경 유기농자재의 잿빛곰팡이병 병원균의 생장 억제 효과)

  • Kwak, Young-Ki;Kim, Il-Seop;Cho, Myeong-Cheoul;Lee, Seong-Chan;Kim, Su
    • Journal of Bio-Environment Control
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    • v.21 no.2
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    • pp.134-139
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    • 2012
  • Inhibition effects on spore germination and mycelia growth for gray mold (Botrytis cinerea) were investigated in vitro using environment-friendly agricultural materials as well as environment-friendly pesticides. The inhibition effect on mycelia growth of gray mold is the highest when the gray mold mycelia were treated with a pesticide (commercial name: Koreayeok, Jihabudea KM, Sootingtan, Sootingstar) that contains a mixture of Bacillus subtilis, resulting in 100% inhibition of the mycelia growth. Meanwhile, the range of less than 20% inhibition effects on the growth of gray mold mycelia was observed with other commercial agricultural materials. The significant inhibition effects on spore germination of gray mold fungus were shown in vitro with two water dispersible pesticides containing sulfur [BTB (97.7%) and SulfurStar (92.3%)], respectively. These in vitro results of inhibiting of the spore germination and mycelia growth together cannot found. It remains to be determined whether the selected environment-friendly agricultural materials in effective control of gray mold in vitro can be used to control gray mold in field.

Studies on Effect of Mold Inhibitor in Corn - Study on Inhibitory Effect of Mold-X - (사료내 곰팡이 발육 억제제의 효과에 관한 연구 - Mold-X의 효과에 관한 연구 -)

  • Yoon Hwa Joong;Chang Kyung Jin;Kim Tae Jong;Won Song Dae
    • Journal of the korean veterinary medical association
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    • v.18 no.7
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    • pp.27-34
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    • 1982
  • In the experiments of the inhibition of mold growth from October 1, 1981 to March 31, 1982, Mold-X has been shown the effective results as follows; 1. In the storage of the corn and the corn meal contained $12\%$ moisture, the growth of mold wa

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A Case of Avian Aspergillosis and Effect of Mold Inhibitor (닭에 있어서 Aspergillosis 증례 및 곰팡이 발육억제제의효과에 관한 연구)

  • 박세종;김선희;신인환;안신욱;정태수
    • Korean Journal of Veterinary Service
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    • v.17 no.2
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    • pp.83-88
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    • 1994
  • The studies were carried out to diagnose of disease chickens that were raised at the chicken farms located in Chung -nam province and evaluated potential of mold growth inhibition of antifungal agent, Mold-X. The diseased 25 chickens that were shown clinical sign such as anorexia, respiratory symptoms, were suspected aspergillosis. The results obtained were summarized as follows ; 1. The diseased thickens were diagnosed aspergillosis according to clinical sign, pathological finding, isolation of etiological agent. 2. The growth of mold was conciderable inhibited by the Mold-X of 300 ppm level.

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Effects of Irrigation Times and Soil Media on the Growth and Physiological Characteristics of Native Fern Asplenium scolopendrium (관수주기와 상토조성이 자생 골고사리(Asplenium scolopendrium)의 생육과 생리에 미치는 영향)

  • Ju, Jin-Hee;Bang, Kwang-Ja
    • Journal of the Korean Institute of Landscape Architecture
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    • v.32 no.6 s.107
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    • pp.109-116
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    • 2005
  • This study was conducted to examine the growth and physiological characteristics of Asplenium scolopendrium native fern as affected by irrigation times and soil media as an environment modeled on habitate where was sunken-condition. 1. Light intensity was lower in sunken than in non-sunken, but air humidity was higher in sunken about $2040\%$. Soil moisture content was higher with the leaf mold in sunken irrigating 2 times/week. The results of chemical analysis of medium showed that EC, pH, organic matter content, total nitrogen, CEC, Exch-Ca, Exch-Mg and Exch-K were higher with leaf mold than sud: leafmold and field soil: sud: leaf mold. 2. In the case of irrigation 2 times/week Asplenium scolopendrium grew well sunken more than non-sunken. As non-sunken condition similar with, 7 times/week irrigation, plant height, frond width, frond length and stipe length increased. In case of soil media, growth of Asplenium scolopendrium was better with leaf mold than that of sand: leafmold or field soil: sand: leaf mold. 3. In the case of irrigation 2 times/week photosynthetic rate, $CO_2$ absorption rate and water efficiency were higher with non-sunken than that of sunken, expect of stomatal conduction, $CO_2$ use efficiency. The physiological characteristics of Asplenium scolopendrium were highest in non-sunken irrigating 7 times/week In case of soil media, physiological activity was higher with leaf mold than sand: leafmold or field soil: sand: leaf mold.

Growth and Photosynthetic Characteristics of Atractylodes japonica by Light Controls and Leaf Mold Treatment in Forest Farming (임간재배 시 광조절과 부엽토 처리에 따른 삽주의 생육 및 광합성 특성)

  • Jeon, Kwon Seok;Song, Ki Seon;Choi, Kyu Seong;Kim, Chang Hwan;Park, Yong Bae;Kim, Jong Jin
    • Korean Journal of Medicinal Crop Science
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    • v.23 no.2
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    • pp.161-167
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    • 2015
  • This study was carried out to determine the effects of light controls and leaf mold on root growth and physiological responses of Atractylodes japonica growing in forest farming. The experiment was performed by light controls (100%, 62.5%, 40.3% and 19.7% of full sunlight) and application of leaf mold to soil. Height, stem diameter, number of flower buds and root collar diameter were the highest in leaf mold within 62.5% of full sunlight (relative light intensity 62.5%). And these were the higher in leaf mold within each light level. As the shading level increased, light saturation point and maximum photosynthesis rate decreased. As the light level decreased, SPAD value increased in control and leaf mold. As a result of surveying the whole experiment, A. japonica was judged worse root growth under the lower light level. It was concluded that the light level was one of the most important factors to produce A. japonica. Also, producing high-quality of A. japonica with the price competitiveness by using leaf mold like the experiment can be an effective way to increase incomes for farmers.

Development of 2 Level × 4 Cavity Stack Mold for Plastic Container (플라스틱 용기 성형을 위한 스택금형 제작에 관한 연구)

  • Jung, Woo-Chul;Heo, Young-Moo;Shin, Kwang-Ho;Yoon, Gil-Sang
    • Design & Manufacturing
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    • v.1 no.1
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    • pp.33-37
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    • 2007
  • In recent, the demand of high-productivity injection mold increases because of the growth of international packaging market. The increase of productivity leads to the large-sized injection molding machine and peripheral devices. For solving this problem, the stack mold which is based on the existing machine and device is studied in advanced countries actively. In this study, as the preliminary research of stack mold development, the stack mold which has 2 Level ${\times}4$ Cavity is designed and manufactured. Besides, the motion and structural analysis are executed to verify the stability of developed stack mold.

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Characteristics of Photosynthesis and Leaf Growth of Peucedanum japonicum by Leaf Mold and Shading Level in Forest Farming (임간재배지 내 부엽토 및 차광수준에 따른 갯기름나물의 광합성과 엽생장 특성)

  • Song, Ki Seon;Jeon, Kwon Seok;Choi, Kyu Seong;Kim, Chang Hwan;Park, Yong Bae;Kim, Jong Jin
    • Korean Journal of Medicinal Crop Science
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    • v.23 no.1
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    • pp.43-48
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    • 2015
  • This study was carried out in order to investigate the photosynthesis response and leaf characteristics of Peucedanum japonicum growing in forest farming. The experiment was performed by leaf mold (pine tree and chestnut tree) and shading levels (0%, 35%, 50% and 75% shading). Light relative intensity was 100% (full sunlight), 60.3% (35% shading), 35.1% (50% shading), and 17.4% (75% shading) respectively. Light response curves of pine-leaf mold and chestnut-leaf mold were the highest in control (full sunlight) and these were getting lower in the higher shading level. Photosynthesis capacity and light saturation point were indicated higher in chestnut-leaf mold within the same shading level. As the shading level increased, maximum photosynthesis rate decreased. And apparent quantum yield was not indicated statistically significant difference from all treatment. Leaf area, leaf length and leaf width were significant higher in 35% shading and control under chestnut-leaf mold in all treatment. As the shading level increased, LAR (leaf area ratio), SLA (specific leaf area) and SPAD value decreased in pine-leaf mold and chestnut-leaf mold. As a result of surveying the whole experiment, P. japonicum is judged better growth and higher yield by maintaining 35% shading (relative light intensity 60%) under chestnut-leaf mold in forest farming.

Studies on the Fermentation of Lupinseed (Part 1) Determination of the Growth Rate of Aspergillus oryzae on Beans. (루우핀 콩의 발효에 관한 연구 (제 1 보)콩배지에서 Aspergillus oryzae 성장속도의 측정)

  • Lee, Cherl-Ho;Oh, Sung-Hoon;Kim, Chan-Shick
    • Microbiology and Biotechnology Letters
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    • v.10 no.3
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    • pp.227-232
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    • 1982
  • The methods determining the growth rate of mold on beans were investigated in order to compare the growth of Aspergillus oryzae on lupinseed to that on soybean. The growth of A. oryzae on cooked whole or paste form of bean substrates was evaluated by the measurements of colony diameter and hyphae length of the mold. The mold showed characteristic lag times to form the colony on different types of substrate. The growth of colony diameter was coincided with the increase in $\alpha$-amino nitrogen content of the substrate when the moisture level of the substrates was similar each other. The colony diameter and the cultivation time after the lag period showed a straight line relationship, from which the growth rate was estimated. in general, lupinseed paste allowed faster growth of A. oryzae than soybean paste at the initial growth phase. The lag time to form the colony was 24.0 hrs on lupinseed paste and 44.4 hrs on soybean paste. The growth rate after colony formation was, however, 7.05 mm/day for lupinseed paste and 8.83mm/day for soybean paste, which indicated that the growth rate after the lag period was faster on soybean compared to lupinseed. The sporulation time of the mold was related to the lag time for the colony formation. The measurement of hyphae length on whole beans could be used as a simple and rapid method of estimating the growth property of mold on different substrates.11 showed that the growth of A. oryzae was partly hindered by the thick hull of the lupinseed.

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Metal-Mold Reaction and Surface Roughness Measurement of Pure Titanium Casting Specimens with Mold Temperatures (순수 티타늄 주조체의 주형온도에 따른 용탕반응성 및 표면거칠기)

  • Cha, Sung-Soo;Song, Young-Ju;Park, Soo-Chul
    • Journal of Technologic Dentistry
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    • v.32 no.4
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    • pp.297-305
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    • 2010
  • Purpose: The purpose of this study was to observe the change of metal-mold reaction and surface roughness in titanium casting specimens for phosphate-silica alumina bonded investment with mold temperatures. Methods: The metal-phosphate silica alumina bonded mold interface reaction and surface roughness of titanium casting specimens according to mold temperatures were investigated. The Specimens were analysed by scanning electron microscopy and surface roughness tester. Results: The oxidation behavior indicated by the growth of oxide thickness. The titanium-oxide layer were consisted two layer of a porous external and a dense internal one. The reaction layer and surface roughness increased with increasing investment material temperature. Conclusion: In this work, The most suitable mold temperature in casting of pure titanium was $200^{\circ}C$.