• Title/Summary/Keyword: mixed effect

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Effects on the Application of Popped Rice Hulls Compost as Substitute Material of Yacto in Yang-jik Nursery Bed of Panax ginseng C. A. Meyer (인삼 양직모밭에서 약토 대체를 위한 팽화왕겨퇴비의 시용 효과)

  • Kang, Seung Weon;Lee, Sung Woo;Hyun, Dong Yun;Kim, Jang Wook;Kim, Yong Bum;Lee, Hye Jin;Cha, Seon Woo
    • Korean Journal of Medicinal Crop Science
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    • v.21 no.1
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    • pp.45-48
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    • 2013
  • This study was carried out to know the substitute effect of Yacto (leaf mold compost) on popped rice hulls compost (PRHC) in Yang-jik nursery bed of Panax ginseng. PRHC was mixed with Yacto as 50:50 ratio, and 1 ~ 2% of the mixed oil cake, rice bran and urea were also added to promote decaying the mixed compost. The mixed compost made by PRHC and Yacto was showed that positive effect on the growth of ginseng seedling when it was mixed with 1% of oil cake and rice bran, and 2% of mixed oil cake. But addition to the 2% of urea in the mixture of PRHC and Yacto was not positive effect on the growth of ginseng seedling. Root yield of the mixed compost was similar to that of conventional compost by made 100% of Yacto. Therefore, the mixed compost can substitute for Yacto when PRHC and Yacto were mixed by 50:50 ratio and added 1% of oil cake and rice bran.

The Effect of Composition of Flour Brew on Growth and Activity of Lactic Acid Bacteria (제빵에서 밀가루 Brew의 조성이 젖산균의 생육에 미치는 영향)

  • 조남지
    • The Korean Journal of Food And Nutrition
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    • v.11 no.6
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    • pp.683-688
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    • 1998
  • This study was conducted to develop optimal composition of flour brew in order to economically utilize flour brew inoculated by lactic acid bacteria as a starter(mother sponge) in bread-making. Two flour brews were prepared ; one with flour and water, the other with flour, water and NaCl. Various nutrients were added to both flour brews and Lactobacilli deMan Rogosa and Sharpe (MRS) broth to investigate the effect of them on growth and activities of Streptococcus thermophilus, Lactobacillus brevis and their mixed culture in flour brews to be tested with incubation at 37$^{\circ}C$. The growth of Streptococcus thermophilus, Lactobacillus brevis and their mixed culture was stimulated by addition of NaCl with 0.85% concentratin and more by mixed culture than by single lactic acid bacteria, resulting in 3 hrs reduction in cultivation and more by mixed culture than by single lactic acid bacteria, resulting in 3 hrs reduction in cultivation time. the addition of 3% glucose to flour brew with NaCl was observed to enhance acid productioni by mixed culture. Yeast extract greatly affected growth and activities of mixed culture of lactic acid bacteria in flour brew with NaCl and its optimum level of this additive in flour brew with NaCl was approximately 1.0%. The optimal composition of flour brew for mixed culture of lactic acid bacteria was suggested as follows; flour 100g, water 300g, NaCl 3.46g, glucose 12.48g, yeast extract 3.46g.

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Characteristics of $CO_2$ Laser Cladding with High Viscosity Mixed Powder (용제와 혼합한 금속분말의 $CO_2$ 레이저 클래딩 특성)

  • 김재도;전병철;이영곤;오동수
    • Journal of Welding and Joining
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    • v.19 no.5
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    • pp.481-485
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    • 2001
  • Laser cladding processing allows rapid transfer of heat to the material being processed with minimum conduction into base metal. The effect of $CO_2$ laser cladding with high viscosity mixed powders was investigated. High viscosity mixed powder consists of bronze powder and flux that is used at a high temperature condition. The mixed powder has a high viscosity that it can be easily pasted over a curved or slope substrate. The device for mixed powder was designed and manufactured. It consists of the high viscosity mixed powder feeding system, the preheating system and the shielding gas system which prevents the clad layer from being oxidized. The results of experiment indicated that the feed rate of high viscosity mixed powder was important for later cladding with mixed powder feeding. The high viscosity mixed powder and substrate must be preheated to prevent porosity from breaking at the clad layer. The experimental result shows that the high viscosity mixed can be applied for laser cladding process.

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Effect of Mixing Time of Pre-Mixed Cement and Post-Mixed Cement on the Strength Development of the Concrete (프리믹스 및 포스트믹스 시멘트를 혼입시간이 콘크리트의 압축강도에 미치는 영향)

  • Baek, Sung-Jin;Lee, Hyeok;Han, Jun-Hui;Kim, Jong;Han, Min-Cheol
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2023.05a
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    • pp.137-138
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    • 2023
  • This study proposed the optimal mixing time for pre-mixed cement and post mixed cement using the statistical analysis method of box plots. Pre-mixed cement can prevent material seegregation, strength loss, and quality variation if mixed for at least 60 seconds, and the data median is shown to be within the box range. Post-mixed cement should be mixed for at least 180 seconds to prevent material segregation, strength loss, and quality variation, and compressive strength tends to increase with longer vibrating times. Therefore, it is suggested that using pre-mixed cement can shorten the vibrating time and increase the productivity of the concrete.

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The Effect on the Protein Metabolism in Albino Rats by feeding on the Rice Mixed with Wheat or Barley Diet (미맥혼식(米麥混食)이 백서(白鼠)의 단백질(蛋白質) 대사(代謝)에 미치는 영향(影響))

  • Park, Sae-Yul
    • Journal of Nutrition and Health
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    • v.6 no.3
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    • pp.9-15
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    • 1973
  • Some effect on the protein metabolism in growing albino rats by feeding on the rice mixed with wheat or barley have been studied. The species of wheat and barley used in this experiment were either 80% polished or nonpolished wheat, barley and naked barley. The growing rats to be examined were fed on 30% wheat or barley mixed with rice diets for 8 weeks. The total nitrogen, creatinine, amino acid nitrogen and urea-nitrogen contents in the liver and the creatinine and urea-nitrogen contents in the urine have been measured. The results obtained are summarized as follows: 1. The total nitrogen contents in the liver and the serum were no remarkable difference by feeding on each mixed diet, compared with the rice diet group. 2. The creatinine contents in the liver of the unpolished wheat and barley mixed diet groups were the similar to that of the rice diet group, but these were higher by feeding on the polished wheat and barley mixed with rice diets. 3. The amino acid nitrogen contents in the liver of the polished naked barley mixed with rice diet groups were the similar to that of the rice diet group, but these were higher by feeding on the other mixed diets than the rice diet. 4. The urea-nitrogen contents in the serum of the polished wheat and naked barley mixed with rice diet groups were higher than that of the rice diet group, but these were significantly lower by feeding on the polished barley mixed with rice diets than the others. 5. The creatinine and the urea-nitrogen contents in the urine of the original wheat and barley mixed with rice diet groups were higher than that of the polished wheat and barley mixed with rice diet groups. In the view of the above results, it could be seen that the protein metabolism was remarkable change according to polish of the wheat and barley.

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A study on structural relationship of receptivity to multiculturalism, communication and marital conflict: focused on mixed couples of FFWP (다문화 수용성, 의사소통, 부부갈등의 구조적 관계에 관한 연구: 국제 결혼한 세계평화통일가정연합 신도를 대상으로)

  • Park, Ok Ja;Yeo, Kyung Hwan
    • Journal of Family Relations
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    • v.21 no.2
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    • pp.149-167
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    • 2016
  • Objective: The purpose of this study is to verify the effect of receptivity to multiculturalism on marriage conflict of international marriage couples and mediation effect of communication between two variables. Method: The subjects are 205 individuals of mixed couples who are living in S. Korea. The mediation analysis was based on structural equation modeling followed by bootstrapping with the use of AMOS 22.0. The demographic variables are also controlled in the data analysis. Goodness-of-fit test using RMR, GFI, IFI, TLI, and CFI was conducted. Results: The study results were as follows: first, receptivity to multiculturalism had a direct effect on marital conflict and communication; second, communication had a direct effect on marital conflict; third, communication had a mediation effect between receptivity to multiculturalism and marital conflict. Conclusions: We could verify in this study that receptivity to multiculturalism and communication is the important factor for marital conflicts of mixed couples. More specifically, communication has a critical role for marriage life of mixed couples.

Effect of kurtosis on the Flow Factors Using Average Flow Model

  • Cho, Yong-Joo;Kim, Tae-Wan;Koo, Young-Pil
    • KSTLE International Journal
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    • v.3 no.1
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    • pp.7-11
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    • 2002
  • The roughness effects are very important due to the presence of interacting asperities in mixed lubrication regime. An average Reynolds equation using flow factors is useful to determine the effects of surface roughness on mixed lubrication. In this study, the effect of kurtosis on flow factors is investigated using random rough surfaces generated numerically, The results show that flow factors are very sensitive to h/$\sigma$ according to the value of kurtosis in the partial lubrication regime.

The Dissociation Constant of Phenol Red Indicator in Mixed Solvents (혼합용매중의 지시약 Phenol Red의 해리정수)

  • 김양배
    • YAKHAK HOEJI
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    • v.20 no.1
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    • pp.41-43
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    • 1976
  • The dissociation constant of phenol red indicator in mixed solvents was studied. Methanol and ethanol were employed as solvents and studied the changes of pK values of indicator according to the kind and concentration of organic solvent which is mixed into water solution. The effect of methanol solvent on pK is negligible at 40%, 60% and 80% mixing. While in the case of ethanol, the effect of above 40% mixing is not negligible.

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A Study on the Criterion for Membrane/Shell Mixed Element and Application to the Rigid-Plastic/Elastic-Plastic Finite Element Analysis (박막/쉘 혼합요소의 판별조건과 강소성/탄소성 유한요소해석 적용에 관한 연구)

  • Jung, Dong-Won;Yang, Kyoung-Boo
    • Journal of Ocean Engineering and Technology
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    • v.13 no.2 s.32
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    • pp.1-10
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    • 1999
  • This study is concerned with the application of new criterion for membrane/shell mixed element in the rigid-plastic finite element analysis and elastic-plastic finite element analysis. The membrane/shell mixed element can be selctively adapted to the pure stretching condition by using membrane or a shell element in the bending effect areas. Thus, membrane/shell mixed element requires a efficient criterion for a distinction between membrane and shell element. In the present study introduce the criterion using the angle of between two element and confirm a generality of criterion from appling the theory to a rigid-plastic and elastic-plastic problems.

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The antibacterial effect of Endoseal TCS mixed with water-soluble mangostin derivatives of Garcinia mangostana L. ethanol extract against Enterococcus faecalis and Staphylococcus aureus

  • Park, Tae-Young;Lim, Yun Kyong;Kim, Jin-Hee;Lee, Dae Sung;Kook, Joong-Ki
    • International Journal of Oral Biology
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    • v.46 no.1
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    • pp.45-50
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    • 2021
  • This study evaluated the antimicrobial activity of Endoseal TCS, an mineral trioxide aggregate-based root canal sealer, mixed with water-soluble mangostin derivatives (WsMD) of Garcinia mangostana L. (mangosteen) ethanol extract against Enterococcus faecalis and Staphylococcus aureus. The antibacterial activity of Endoseal TCS mixed with WsMD against three strains of E. faecalis and three strains of S. aureus was performed using agar diffusion test. The data showed that Endoseal TCS mixed with 0.115% WsMD had a zone of inhibition of 0.7 ± 0.2-2.4 ± 0.1 mm. The results suggest that Endoseal TCS mixed with WsMD of Garcinia mangostana L. ethanol extract is useful as a root canal sealer with antibacterial activity against E. faecalis and S. aureus.