• 대한치과보철학회지
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• 제35권4호
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• pp.697-705
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• 1997

The purpose of this study was to evaluate the effects of two metal adhesive primers on the shear bond strengths of self-curing resin to Ni-Cr a]toy and the effects of 1000 thermal cycling on the durability of the bond. The two selected metal adhesive primers were Metal Primer II(G-C corp., Japan) and MR Bond(Tokuyama corp., Japan) and no treatment groups were used as control. All specimens were divided into two groups according to thermal cycling. In the group without thermal cycling, the specimens were stored in water for 24 hours. In the group with thermal cycling, the specimens were thermocycled 1000 times at temperature of $5^{\circ}C\;and\;55^{\circ}C$. Shear bond strengths were measured using the Universal testing machine(Zwick 145641, Germany) with a crosshead speed of 0.5 mm/min. The results were as follows: 1. MR Bond significantly improved the shear bond strength of resin to Ni-Cr alloy before and after thermal cycling. 2. There were no difference in the shear bond strength of resin to Ni-Cr alloy between Metal Primer II treated group and no treatment group. 3. Regardless of the type and the use of adhesive primers, there were tendency of decrease in shear bond strength with 1000 thermal cycling.

• 대한의생명과학회지
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• 제25권4호
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• pp.331-338
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• 2019

Human Aichivirus A1 (HuAiV-A1) is a waterborne human pathogenic virus classified as Picornaviridae and Kobuvirus. In this study, we developed a method that can detect about 35 minutes faster with the same detection sensitivity level than the previously reported HuAiV-A1 diagnostic RT-PCR primer. The RT-PCR primer sets developed in this study are capable of detecting HuAiV-A1 at a level of about 100 ag and formed 563 bp amplification product. In addition, the RT-nested PCR method was able to amplify 410 bp using the RT-PCR product as a template. The detection sensitivity of our method was 10 times higher than the method with the highest detection sensitivity to date. Therefore, the detection method of HuAiV-A1 developed in this study is expected to be used in the water environment in which a small amount of virus exists. Also, this detection method is expected to be used as HuAiV-A1 diagnostic technology in both clinical and non-clinical field.

• Restorative Dentistry and Endodontics
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• 제21권2호
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• pp.635-641
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• 1996

This study was designed to evaluate the anti cariogenic effect of F in primers, bonding agents, composite resins or glass ionomer cements in enamel. Twenty-five extracted teeth were selected and a cavity was prepared on either the buccal or the lingual surface of each tooth. After pumicing and etching, the samples were divided into 5 groups. In group A, the samples were primed, bonded and filled with ART bond and Brilliant Enamel (Coltene, Switzerland). Group B composed of Optibond and Herculited XRV (Kerr, USA), group C composed of Syntac and Tetric(Vivadent, Lichtenstein), and group D composed of Scotch-bond Multipurpose and Z 100 (3M, YSA). In group E, the samples were filled with glass ionomer cement (Fuji II LC, Japan), All surfaces except the 2mm beyond the cavosurface margin of the sample were protected, and samples were then put into an acid buffer for 3 days to develop the initial caries. The samples were then sectioned through the filling body into thin wafers and then examined with a polarizing microscope under water imbibition. The fluoride in primer, bonding agent, or composite filling material did not prevent the initial caries in the enamel area adjacent to the filling body whereas the fluoride in the glass ionomer did prevent the initial stage caries.

• 접착 및 계면
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• 제19권1호
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• pp.1-4
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• 2018

본 연구에서는 부착력 향상 및 모바일 기기용 toluene-free 프라이머를 제조하기 위해 클로로프렌 고무 (CR)에 실리카 나노입자를 분산시켜 CR/silica 복합체를 제조하였다. CR/silica 복합체는 FT-IR, SEM, EDS 등을 이용하여 물성을 평가하였다. SEM을 통해 실리카 나노입자의 함량이 4 phr일때 가장 균일하게 분산되어 있는 것을 확인하였다. 접촉각과 연필경도측정을 통해 실리카 함량이 증가할수록 소수성을 띠는 것과, 연필경도가 증가함을 나타내었다. 부착력 결과 역시 실리카 함량이 4phr일때 가장 높았으며, 실리카가 함유되지 않은 P-0에 비해 50% 증가함을 확인하였다.

• 대한임상검사과학회지
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• 제51권4호
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• pp.414-419
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• 2019

JC polyomavirus (JCPyV)는 viral group I, Polyomaviridae로 분류되는 사람 병원성 바이러스 이다. JCPyV는 최근 하수 등 수질오염 지표로 제안됨에 따라 수질환경에서 모니터링 필요성이 제기되고 있다. 임상 및 환경 시료 중 JCPyV 검출을 위해서 PCR 시스템이 사용되어 왔다. 그러나 신속하고 높은 검출 민감도를 가진 방법의 필요성에 따라 이번 연구에서는 등온증폭 프라이머 조합을 개발하였다. 이번에 개발한 방법은 기존 PCR 시스템에 비해 더욱 신속 및 약 10배 더 높은 검출 민감도를 보여주었다. 또한 본 연구에서 개발한 검출 방법의 재 검정을 위해서 HaeIII 제한효소를 이용한 방법을 함께 고안하였다. 따라서 이번 연구는 임상, 환경 등의 시료에서 JCPyV를 모니터링 하기 위한 방법으로 활용이 기대된다.

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2002년도 추계학술대회
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• pp.678-678
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• 2002

No Abstract, See Full Text

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2008년도 추계학술대회 초록집
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• pp.124-125
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• 2008

• 접착 및 계면
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• 제19권1호
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• pp.5-12
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• 2018

본 연구는 선처리제 공정을 생략하고 우수한 접착 특성을 가지는 합성피혁용 스킨(skin) 수지제조에 관한 것으로 이성분계 혼합 폴리우레탄 수분산체를 제조하여 이에 대한 선처리제(primer)를 생략한 접착 시편의 접착특성을 평가하는 것이다. 이성분계 혼합 폴리우레탄 수분산체의 제조는 에스터(ester)계 폴리우레탄 수지(PU-T)와 카보네이트(carbonate)계 폴리우레탄 수지(PU-C)를 각각 합성하고 이를 배합함으로써 최종 수지를 얻었다. 선처리제를 생략한 접착시편의 접착강도 측정결과, 우수한 상태접착강도 (Ethylene vinyl acetate(중창): $4.2kg_f/cm$, 고무(겉창) : $4.4kg_f/cm$)를 가짐을 확인할 수 있었다. 이는 신발 제조 공정에서 필수불가결하게 사용되었던 선처리제(primer) 공정을 생략가능하게 함으로써 공정의 단축과 선처리제(primer)에서 발생되는 휘발성유기화합물 (VOCs)의 감소를 가져와 친환경적인 장점을 지닌다.

• Corrosion Science and Technology
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• 제6권5호
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• pp.219-226
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• 2007

Pre-construction primer (PCP), or shopprimer, have been applied to steel plates to control temporary corrosion during ship fabrication. For surface preparation at ship block stage, in common shipyard practices, welding beads, burnt and rusted areas shall be blasted or power tool cleaned and the contamination such as zinc salt shall be removed with blasting or power tool. Whereas, the sound film of PCP needs not to be removed or roughened as the paint having good compatibility with PCP is used for the first coat. In many cases, however, full blasting or sweep blasting on the sound PCP treated block assemblies was requested. There still has been argument about the legitimacy of this practice, thus, it is critical to evaluate the quality of the coating system applied on the sound PCP retained condition, comparing with the one applied on the full blasted or sweep blasted condition. In this study, two different epoxy systems for water ballast tank were applied on the surfaces with sound PCP condition, full blasted condition, and sweep blasted condition. Coating performances such as durability, anti-corrosion, cathodic disbondment resistance were evaluated. The test results clearly indicated that the sound film of PCP needed not to be removed or roughened as the paint having good compatibility with PCP based on inorganic zinc silicate.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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• pp.225-230
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• 2001

Cast-in-place foamed concrete is a high porous material placed as base the layer of mortar screeds in the panel heating system, so the quality of mortar is affected by it. Therefore, this study is aims to investigate how the absorption characteristics of foamed concrete influences on mortar screeds according to the foamed ratio-62%, 67% and 72%- and the surface treatments of foamed concrete-water and acrylic emulsion primer spray, etc. The result of this study shows that water-spray in the surface of foamed concrete has a good effects to reduce mortar cracking.