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Lee, Eung-Su;Kang, Chan-Young;Park, Heon
- Journal of the Korean Wood Science and Technology
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- v.38 no.6
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- pp.541-546
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- 2010
This study was to investigate the dry bond strengths of the plywoods manufactured with 3 hours ozonized soybean oil (SBO)/polymeric methylene diphenyl diisocyanate (pMDI) adhesive at mid and high curing temperature. In results of the dry bonding strengths of the 3 hrs-ozonized SBO mixed with pMDI at high curing temperature were respectively the strengths of weight ratio of 3hrs-ozonized SBO : pMDI, 1 : 0.5, 4.74 kgf/$cm^2$, 1 : 0.75, 7.14 kgf/$cm^2$ 1 : 1, 9.29 kgf/$cm^2$, 1 : 2, 16.53 kgf/$cm^2$, 1 : 3, 17.42 kgf/$cm^2$, and 1 : 4, 16.75 kgf/$cm^2$. Therefore, it was found that the equivalent ratio was formed approximately between 3 hrs-ozonized SBO : pMDI 1 : 2 and 1 : 3. The dry bonding strengths of the 3hrs-ozonized SBO mixed with pMDI at medium curing temperature were respectively the strengths of weight ratio of 3 hrs-ozonized SBO : pMDI, 1 : 0.5, 3.16 kgf/$cm^2$, 1 : 0.75, 6.13 kgf/$cm^2$ 1 : 1, 8.18 kgf/$cm^2$, 1 : 2, 11.82 kgf/$cm^2$. In this experiment the higher bonding strength at high curing temperature was shown approximately between 3 hrs-ozonized SBO : pMDI 1 : 2 and 1 : 3. If this wood adhesive is used at high curing temperature, it is possibile to bond the plywoods.
https://doi.org/10.5658/WOOD.2010.38.6.541 인용 PDF KSCI

Rhee, Joon-Shick
- Korean Journal of Food Science and Technology
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- v.10 no.2
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- pp.250-257
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- 1978
Functional additives such as methyl silicone, TBHQ and BHA/BHT have been evaluated for their effects on storage and frying stabilities of the vegetable salad oil. All test results strongly suggest that methyl silicone improved the frying stability and TBHQ improved the storage stability. BHA/BHT improved neither storage stability, nor frying stability of the vegetable saladoil. Based on the test results, it is recommended that methyl silicone in the range of $1.0{\pm}0.5ppm$ and TBHQ in the range of 200ppm be added to the vegetable salad oil for the improvement of frying and storage stabilities.
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Park, Jong-Ho;Ryu, Kyoung-Yul;Lee, Byung-Mo;Jee, Hyeong-Jin
- Korean journal of applied entomology
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- v.47 no.3
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- pp.249-254
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- 2008
This study was conducted to develop an organic control method of two spotted spider mite(Tetranychus urticae) by using cooking oil and yolk mixture(COY) through evaluating its acaricidal activity in laboratory and green house. In laboratory, there is no significant difference in acaricidal activity against T. urticae within the COY including soybean, canola(rape seed), sunflower and olive oil. The acaricidal activity against T. urticae. increased from 17.6% to 94.1% as the COY became concentrated between 0.1% to 1%. The COY acricidal activity was effected by the quantity of treatment according to application methods. The COY dealt with T. urticae eggs presented 95% of the ovicidal activity. In rose greenhouse damaged by T. urticae, the COY(0.3%) was sprayed three times and resulted in the high control value of mites between 69.0% to 89.6%.
https://doi.org/10.5656/KSAE.2008.47.3.249 인용 PDF KSCI

Jo, Man-Ki;Kang, Byeong-Hoe;Lee, Dong-Gyu;Park, Kyu-Yeon;Han, Min-Cheol;Han, Cheon-Goo
- Proceedings of the Korean Institute of Building Construction Conference
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- 2014.05a
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- pp.136-137
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- 2014
In this study, fundamental performances of high strength concrete with ERCO has been analysed according to mock-up test. The following results could be made as the conclusion. For the fresh concrete, flowability and air content decreased with the addition of ERCO, and all the specimens satisfied the target range. For the strength properties, all the specimens with different nominal strength showed higher compressive srength than Plain which with 0% dosage of ERCO.
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