• 현장농수산연구지
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• 제13권1호
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• pp.27-33
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• 2011

코팅소재별 벼 종자의 발아 및 입묘 특성을 구명하기 위하여 무처리, 규산코팅, 철분코팅, 규산복토 처리에서 유묘의 입모율, 경시적 입묘양상의 변화, 초장, 엽수, 생체중의 특성을 조사결과를 요약하면 다음과 같다. 1. 입모율은 무처리 95% 규산코팅 및 규산복토 92%, 철분코팅 77%로 각가 나타나 무처리에서 가장 높게 나타났지만 일반적으로 각종 제한요인(새 피해, 건조, 부묘현상 등)이 많은 포장조건에서는 무처리 조건이 상반된 결과가 나타나고 있으며 규산코팅 또는 복토조건에서 철분코팅보다 높은 입묘율을 보였다. 2. 벼 유묘의 초장에서는 무처리 11.4cm 규산코팅 10.8cm, 규산복토 8.8cm, 철분코팅 6.9cm으로 각각 나타났다. 3. 유묘의 생체중은 지상부의 경우 무처리 50mg, 규산코팅 및 규산복토 40mg, 철분코팅 30mg이었으며, 지하부의 경우 규산코팅 및 규산복토 20mg, 무처리 및 철분코팅 10mg으로 각각 나타났다.

• Journal of Applied Biological Chemistry
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• 제58권1호
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• pp.61-64
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• 2015

CSW-LO 코팅액으로 코팅된 '홍로' 사과의 저장 중 미생물 수 및 품질 변화를 측정한 결과 대조구와 코팅된 사과의 총 호기성 세균과 효모 및 곰팡이 수는 유의적인 차이를 보였다. 또한 처리구의 경도, 중량감소, 비타민 C 함량은 저장 중 대조구에 비해 더 낮은 감소를 보였다. 따라서 CSW-LO 코팅은 '홍로' 사과의 저장 중 미생물학적 안전성과 품질유지에 효과적인 수확 후 처리라고 판단된다.

• 한국작물학회지
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• 제66권4호
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• pp.435-442
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• 2021

1. 이탈리안 라이그라스의 코팅종자 제조시 접착제는 PVA가 유리하였으며 2~5% 내에서는 큰 차이가 없어 경제적으로 판단했을 경우에는 2%가 유리하다. 2. 탄산칼슘+탈크를 활용하여 종자 코팅하는 것이 천립중, 리터중이 높고 매끄럽게 성형되어 유리하였으며, pH와 EC가타 피복제에 비해 낮아 화학적으로 안전하였으며, 발아세, 평균발아속도가 높아 타 피복제에 비해 우수하였다. 3. 탄산칼슘+탈크를 무게에 따라 코팅하여 비교했을 시, 대조구에 비해 발아율, 발아세, 평균 발아 속도에서 초장 차이를 보이지 않았으며, 강도는 피복 재료와 종자와의 무게 비율 1:1과 그 이상 무게를 추가할 경우에는 차이를 보이지 않아 경제성을 고려하였을 때 1:1이 가장 유리하였다.

• KIEAE Journal
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• 제15권1호
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• pp.83-88
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• 2015

This study aims to develope the light-weight PV blinds with windows and to investigate the shading analysis by the control conditions. For the study, the polycarbonate characteristics and coating methods are analyzed and the PV blind design for a small office is suggested. Also, the mock-up model of a suggesting system was made. The field tests were controled based on a solar altitude under clear sky conditions. As results, it is necessary to use a polycarbonate instead of a tempered glass for a light-weight PV. The shading effects of blind systems are high in slat angle $30^{\circ}$ and low in $0^{\circ}$. Also, the shading ratio is more affected by solar latitude than solar altitude. The shading change rate is relevantly constant on the solar altitude.

• 접착 및 계면
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• 제21권4호
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• pp.143-155
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• 2020

Sol-Gel 공정을 통해서 제조되는 유-무기 하이브리드 화합물들은 방청 코팅, 방빙 코팅(Anticing), 자가 세정 코팅, 반사 방지 코팅 등과 같은 기능성 코팅 재료로 널리 사용되어져 왔다. 특히 소수성 코팅 표면을 제조하기 위해서는 코팅표면의 표면에너지가 낮고 코팅 표면의 조도를 제어가 요구된다. 표면에너지와 표면 조도를 조절하는 전형적인 공정은 in-situ fabrication 공정, 'Pre-fluorinating/Post-roughening', 'Pre-roughening/ Post-fluorinating이다. 본 연구에서는 in-situ fabrication 공정인 Particle-Binder 공정을 이용해서 소수성 코팅표면을 제조하였다. 3관능기 유기실란화합물과 불소 함유 유기실란 화합물과의 가수분해 및 축합반응을 통해 제조된 불소함유 유-무기 하이브리드를 바인더로 사용하여서 무기물 나노입자와 혼합하여 소수성 코팅액을 제조하고 유리 기재 위에 스핀코팅 후 열건조하여서 코팅막을 제조하였다. 바인더인 유-무기 하이브리드 화합물의 불소 함유 실란화합물의 첨가량, 첨가순서, 무기물 나노입자 첨가량에 따른 코팅막의 물성 변화를 조사하였다. 분석결과 불소 함량이 10 wt%인 유-무기 하이브리드 화합물(GPTi-HF10)을 바인더로 사용하여서 제조된 코팅막이 가장 소수성이 우수하였으며 수접촉각은 (107.52 ± 1.6°), 이 바인더와 무기물 나노입자의 무게비가 1:3인 경우(GPTi-HF10-MS 3.0)에 가장 높은 수접촉각(130.84±1.99°)을 나타내었다.

• 한국응용과학기술학회지
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• 제26권4호
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• pp.467-472
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• 2009

Ultraviolet curable coating solution was prepared with poly(ethylene glycol) acrylate oligomer and various mono and multi-functional acrylate monomers. The optical properties of UV cured coating layer on PET film with acrylate coating solution containing metal oxides, such as fumed silica and alumina, were also investigated to reduce light reflection on films. Poly(ethylene glycol) diacrylate which has 575 of average molecular weight was used as oligomer acrylate, and pentaerythritol triacrylate and dipentaerythritolpenta-/hexa acrylate were used as multi-functional acrylate monomers. Also, butyl acrylate was used to improve the adhesion as well as to reduce glass transition temperature to give a better flexability. 1-hydroxy cyclohexyl phenyl ketone was used as photoinitiator. We found out the metal oxides in acrylate coating solution showed a homogeneous dispersion from energy dispersive spectroscopy data. Transmittance and light reflection of coated PET film was measured with UV/vis spectrometer and gloss meter, respectively. When 1.00 g of both metal oxides was added into coating solution, the transmittance and the glossiness were reduced from 90% to 30% and from 190 GU to 35 GU, respectively. However, adding up to 1.00 g of the metal oxide into coating solution did not affect on the hardness of coating layer and adhesion between coated layer and PET film. Conclusively, we can control transmittance and light reflection of coated film by adjusting the amounts of metal oxide in coating solution.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 춘계 학술발표회 제20권1호
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• pp.849-852
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• 2008

주차장의 열화조건 중 가장 보편적으로 나타나는 코너 부위의 열화요인을 실험적으로 재현하여 바닥재의 성능을 비교 평가하여 바닥재의 신뢰성을 확보하기 위하여, 윤하중 시험을 실시하고 있다. 하지만 윤하중 시험의 시험 조건별 시험결과가 상이하여, 보다 명확한 시험조건의 설정이 필요하다. 이에 본 연구에서는 2가지 조건의 윤하중 시험을 실시하여, 보다 실제상황과 유사한 시험조건을 찾고자 한다. 1. 공통조건 - 실제 자동차 타이어에 300㎏의 하중을 가하여, 5㎞/h의 속도로 80,000 회전 시킨 후 마모도를 평가 2. 조건(A) - 별도의 (열화)조건을 주지 않고 마모도를 평가 3. 조건(B) - 30회마다 1회씩 1.0g의 표준사를 1m 높이에서 낙하

• 한국작물학회지
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• 제49권1호
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• pp.46-51
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• 2004

The film coated snap bean (Phaseolus vulgaris) seeds with five different coating materials treated with 3% increase in seed weight were planted at sandy loam soil controlled moisture content of 18, 19, 20 and 21 %. The oxygen diffusion rate (ODR) was calculated from the different moisture content soil. The number of normal seedlings, seedling vigor, and seedling capability in field (seed vigor x dry matter weight) were observed at 9 days after planting and compared to the changes of ODR. The germination rate and ODR were sharply decreased simultaneously in the seeds planted at 21 % soil moisture content. Seedling emergence did not occur at all as the soil moisture content increased above 22 %. Hence this value should be considered as the threshold of soil moisture content for seedling emergence. An ODR value under 20% did not influence the percent emergence significantly. The certain difference observing in the emergence at the same ODR was not related clearly to the condition of soil. So it can be assumed that the limit of soil moisture content for the emergence of snap bean was approximately 20%. The value of 18% soil moisture content may be considered as the optimum for snap bean emergence. There was close relationship between the mean value of ODR in different soil moisture contents and the emergence. The germination rates of the seeds coated with the different materials were quite different when the seeds were planted at 21 % soil moisture. Dry weight of the seedlings from film coated seeds was decreased slightly, but the germination rates were not much different from the non-treated control under relatively higher soil moisture content (21 %). Major factor lowering emergence rate was oxygen stress while film coating act as a minor constraint for snap bean sown in excess soil moisture condition.

• 대한수의학회지
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• 제48권1호
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• pp.27-32
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• 2008

The present study was carried out to develop a sustained release implantable formula of bovine somatotropin (SRIF-BST) and to examine its sustained release effect. The SRIF-BST was produced by coating a solid pellet, which was comprised of BST and an excipient, made of a biodegradable polymer and poloxamer, which are capable of regulating the rate of BST release. The coated membrane of SRIFBST was observed with a field emission scanning electron microscope. The thickness of the coated membrane was approximately $1{\mu}m$, and the pore sizes of the coated membrane surface were below $10{\mu}m$. In dissolution test, the release duration of the SRIF-BST maintained for 10 days, whereas the release duration of the control BST formula maintained for 3 days. In weight gain assay and tibia test of hypophysectomized rats, the release duration of the SRIF-BST treated group was 12 days and the net weight gain was 53.16 g, also the tibia length and strength of the SRIF-BST treated group was increased 10.5% and 23.1% compared with those of the control group, respectively.

• 한국작물학회지
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• 제43권4호
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• pp.214-222
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• 1998

These experiments were conducted to investigate water uptake, electrical conductivity, germination percentage, seedling growth, and seedling establishment rate in direct seeding cultivation of rice. The rice seeds of six japonica type varieties were coated with 12 kinds of polymers in a standard concentration of 0.2% using seed coating machine. The water absorption of the polymer-coated seeds under saturation conditions was not different among varieties, and was the highest in kulcel, maltrin, and waterlock on the polymer-coated seeds. The electrical conductivity with waterlock (55.0 $\mu scm^{-1}g^{-1}$) was higher than the control plot (45.6 $\mu scm^{-1}g^{-1}$) and other treatments. The germination of the polymer-coated seeds was 95.9% at control plot, 92.7% at low temperature and 35.7% at high temperature. The total dry weight of seed decreased in the order of low temperature, control plot, and high temperature, and was effective in pvp (polyvinyl pyrrolidone), opadry, and sacrust. The seedling establishment rate in direct seeding cultivation ranged from 74.9 to 81.0% in flooded paddy surface, and ranged from 64.7 to 76.6% in dry paddy. In both cases, it decreased in the order of early, medium and medium-late varieties, but was enhanced in daran 8600, sepirect, and sacrust. According to this study the recommended polymers for direct seeding cultivation of rice are daran 8600, sepirect, and sacrust.