• 한국염색가공학회지
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• 제33권4호
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• pp.269-279
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• 2021

In this study, the laminating of TPU film after coating of primer adhesive on the fabrics was applied in order to secure the strength to withstand a fall from a higher altitude by increasing the adhesion between the fabric and the film layer. It seems that the fineness of the yarn and the weave construction have a greater effect than the type of the laminating films. The order of superiority of the laminated fabrics by film type and thickness was the same for 1000 denier and 210 denier fabrics, and the tendency was consistent with the order of superiority in the film properties and peel strength tests. The tear strength of laminating fabrics increased three to four times for 1000 denier fabrics compared to the fabric alone, but it decreased by 2 times for the 210 denier fabrics. Summarizing the above results, it is most appropriate to combine 1000d fabric with three types of laminating films(100~200㎛ thickness) of A(0.2T) or B(0.15T) or D(0.1T) considering the air pressure resistance, the impact resistance during the fall, and the durability against damage during use.

• 식물조직배양학회지
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• 제25권6호
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• pp.519-524
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• 1998

한국산 수박 녹반 모자이크 바이러스(CGMMV-WK)를 TR-PCR 기술에 의해서 간편하고 확실한 진단방법을 구명하고 아울러 CGMMV의 외피단백질 유전자를 클로닝 하였다. 바이러스의 추출은 Lee등 (1996)의 간이 조즙액추출법을 변형하여 정제된 핵산 추출액을 사용하여도 RT-PCR이 양호하였으며, 20 pmol의 primer, reverse transcriptase (30 unit), Rnasin (5unit)이 첨가된 PCR 반응액에서 one step reaction으로 RT-PCR이 가능하였다. CGMMV의 진단을 위한 RT-PCR 조건으로 42$^{\circ}C$에서 45분간 cDNA를 합성하고 있어서 95$^{\circ}C$ 에서 2분간 per-denaturation하고 96$^{\circ}C$ 에서 30초, 6$0^{\circ}C$ 에서 30초 그리고 72$^{\circ}C$에서 1분간으로 36 cycle을 반응을 수행함으로서 간편하고 확실하게 CGMMV를 진단할 수 있었다. 또한 추출된 CGMMV의 외피단백질의 염기서열분석 한 결과 CGMMV-W와는 98.77%, CGMMV-SH와는 99.38%의 상동성을 가지고 있었으며 아미노산 서열은 모두 100%의 상동성을 가지고 있었다.

• 대한치과교정학회지
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• 제32권4호
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• pp.293-300
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• 2002

본 연구의 목적은 산부식된 법랑질에 수분이나 타액이 오염되어도 적절한 접착력을 얻을 수 있다고 소개된 교정용 친수성 프라이머를 이용한 교정용 브라켓 접착시 타액 오염 정도에 따른 전단결합강도와 접착 파절 양상을 기존의 소수성 프라이머와 비교함으로써 임상적 유용성을 평가하는 것이다. 사람의 소구치를 강철 원통에 교정용 레진으로 포매하여 만든 시편에 기존의 소수성인 Transbond XT primer와 친수성인 Transbond MIP primer각각에 대하여 광중합형 접착 레진으로 브라켓을 접착시, 인공 타액을 이용한 오염정도에 따른 전단결합강도를 만능시험기로 측정하고, 접착 파절 양상을 stereomicroscope로 관찰하여 다음과 같은 결과를 얻었다. 1. 건조 상태에서 Transbond XT primer와 Transbond MIP primer의 전단결합강도는 유의한 차이가 없었다. 2. 타액 오염시 그 정도에 상관없이 Transbond MIP primer는 Transbond XT primer에 비해 유의하게 높은 전단결합 강도를 나타냈다(p<0.001). 3. Transbond MIP primer는 한 겹의 타액 오염시 건조 상태와 전단결합강도의 유의한 차이가 없었으나, 두 겹의 타액 오염시에는 유의하게 낮은 결합강도를 나타냈다(p<0.01). 4. 접착 파절 형태는 타액 오염의 정도에 따라 평균 접착제 잔류 지수가 낮아지는 경향을 나타냈다. Transbond MIP primer는 타액 오염시에도 반 이상이 브라켓-레진 계면에서의 파절을 보였으나, Transbond XT primer는 타액 오염시 대부분의 경우 레진-법랑질 계면에서의 파절을 나타냈다. 이상의 실험 결과, 교정용 친수성인 Transbond MIP primer는 수분 조절이 어려운 임상 상황에서 적절한 결합강도를 얻을 수 있는 좋은 방법으로 생각된다.

• Restorative Dentistry and Endodontics
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• 제27권3호
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• pp.257-269
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• 2002

Objective : The purpose of this study was to evaluate the resin infiltration into dentin of one-bottle adhesive systems and self-etching primer bonded to Class V cavities using confocal laser scanning microscope(CLSM). Material and Methods : Forty Class V cavities were prepared from freshly extracted caries-free Human teeth. These teeth were divided into two groups based on the presence of cervical abrasion: Group I, cervical abrasion : Group II, wedge-shaped cavity preparation. Resin-dentin interfaces were produced with two one-bottle dentin bonding systems-ONE COAT BOND(OCB; Coltene$^R$) and Syntac$^R$SPrint$^{TM}$(SS; VIVADENT)-, one self-etching priming system-CLEARFIL$^{TM}$ SE BOND (SB : KURARAY)- and one multi-step dentin bonding system-Scotchbond$^{TM}$Multi-Purpose (SBMP, 3M Dental Products)-as control according to manufacturers' instructions. Cavities were restored with Spectrum$^{R}$(Dentsply). Specimens were immersed in saline for 24 hours and sectioned longitudinally with a low-speed diamond disc. The resin-dentin interfaces were microscopically observed using CLSM. The quality of resin-infiltrated dentin layers were evaluated by five dentists using 0~4 scale. Results : Confocal laser scanning microscopal investigations using primer labeled with rhodamine B showed that the penetration of the primer occurred along the cavity margins. Statistical analysis using one-way ANOVA followed by Duncan's Multiple Range test revealed that the primer penetration of the group 2(wedge-shaped cavity preparation) was more effective than group 1(cervical abrasion) and that of the gingival interfaces was more effective than the occlusal interfaces. In the one-bottle dentin bonding systems, the resin penetration score of OCB was compatible to SBMP, but those of SS and self-etching priming system, SB were lower than SBMP.

• 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.

• Journal of Plant Biotechnology
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• 제47권2호
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• pp.150-156
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• 2020

Weeds play an important role in the survival of viruses and are potential inoculum sources of viral diseases for crop plants. In this study, specimens of Pseudostellaria heterophylla exhibiting symptoms of the cucumber mosaic virus (CMV) were collected in Bonghwa, Korea. The characteristics of the disease were described and leaf RNA was extracted and sequenced to identify the virus. Three CMV contigs were obtained and PCR was performed using specific primer pairs. RNA from positive samples exhibiting CMV leaf symptoms was amplified to determine the coat protein. A sequence comparison of the coat protein gene from the CMV BH isolate shared the highest nucleotide identity (99.2%) with the CMV ZM isolate. Phylogenetic analysis showed that CMV-BH belonged to subgroup IA and that the most closely-related isolate was CMV-ZM. All test plants used for the biological assay were successfully infected with CMV and exhibited CMV disease symptoms such as blistering, mosaic, and vein yellowing. To our knowledge, this is the first report of CMV infection in P. heterophylla from Korea.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.113.2-114
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• 2003

Five pepper-infecting potyviruses, Pepper mottle virus (PepMoV), Chilli veinal mottle virus (CVMV), Pepper veinal mottle virus (PVMV), Pepper severe mosaic virus (PSMV) and Tobacco each virus (TEV), are known filamentous virus and can be infected pepper crops systemically. To understand pathology and genome information of the five viruses on pepper plants, host reactions and sequences were compared to the 5 viruses. Five potyviruses were inoculated onto some typical cultivars of hot peppers and compared their symptoms, and virus accumulations. A set of degenerate primers for potyviruses were applied to 5 viruses and RT-PCR was performed. RT-PCR products containing partial nuclear inclusion b and coat protein (CP) genes were cloned. Then, oligo dT primer and species-specific primer were redesigned to amplify the C-terminal part of CP and 3' noncoding regions of each viruses. Sequences of the viruses were analyzed and compared to serological relationships among the viruses. The data can be useful for screening of potyviruses in pepper plants and pathogen-derived transgenic pepper plant development.

• 식물병연구
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• 제10권1호
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• pp.30-33
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• 2004

현재까지 벼 줄무의잎마름병(Rice stripe virus, RSV)은 남부지방에 국한되어 발생되어 왔다. 그러나 최근에는 RSV의 발생이 충청도, 경기도를 포함한 중부지방까지 확산되는 경향을 나타내고 있다. 이병의 병징은 육안으로는 생리적인 장해 현상과 구분하기가 힘들다 본 실험에서는 이병주 및 애멸구(Laodelphax striatellus)로 부터 viral RNA를 추출한 후 RNA복제효소 및 외피단백질유전자에 특이적인 primer를 제작하여 RT-PCR법에 의해 RSV를 검정하였다. 그결과 이병식물체 및 보독 애멸구로부터 RNA복제효소 유전자에 특이적인 band(1,023 bp) 및 외피단백질유전자에 특이적인 band(969 bp)가 관찰되었다.

• Journal of Plant Biotechnology
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• 제36권4호
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• pp.384-391
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• 2009

Previously, two events (H15 and B20) of transgenic pepper (Capsicum annuum L.) that enhanced resistance to Cucumber mosaic virus (CMV) by the introduction of CMV coat protein (CP) gene were constructed. Presently, a single copy number of the CP gene was revealed in H15 and B20 by Southern blot. To predict possible unintended effects due to transgene insertion in an endogenous gene, we carried out sequencing of the 5'-flanking region of the CP gene and a Blastbased search. The results revealed that insertion of the transgene into genes encoding putative proteins may occur in the H15 and B20 transgenic event. Mutiplex polymerase chain reaction (PCR) for simultaneous detection and identification of transgenic pepper was conducted with a set of nine primers. Both transgenic event were differentiated from non-transgenic event by the presence of 267 bp and 430 bp PCR products indicative of CP gene specific primer pairs and primer pairs targeting the CP gene and 35S promoter. H15 and B20 uniquely possessed a 390 bp and 596 bp PCR product, respectively. The presence of a 1115 bp product corresponding to intrinsic pepper actin gene confirmed the use of pepper DNA as the PCR template. The primer set and PCR conditions used presently may allow the accurate and simple identification of CMV resistant transgenic pepper.

• Journal of Plant Biotechnology
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• 제5권2호
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• pp.83-86
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• 2003

A reverse transcription polymerase chain reaction (RT-PCR) protocol was developed using two specific 22-mer primers located in coat protein gene of SPFMV. A 411 bp PCR-product was detected in virus infected plants as well as tissue culture raised sweet potato but not in healthy plants. For optimization of RT-PCR protocol, the optimum crude nucleic acid concentration, annealing temperature, primer concentration and numbers of PCR-cycle for maximum sensitivity and specificity were determined. The optimum condition for RT-PCR was as follows: RT-PCR reaction mixture was one-step mixture, containing 50 pmol of primer, 30 units of reverse transcriptase, 5 units of RNasin, and the crude nucleic acid extracts (200 ng). In RT-PCR, cDNA was synthesized at $42^{\circ}C$ for 45 min before a quick incubation on ice after pre-denaturation at $95^{\circ}C$ for 5 min. The PCR reaction was carried out for 40 cycles at $96^{\circ}C$ for 30 see, $63^{\circ}C$ for 30 sec, $72^{\circ}C$ for 1 min, and finally at $72^{\circ}C$ for 10 min. The viral origin of the amplified product was confirmed by sequencing, with the sequence obtained having $95-98\%$ homology with published sequence data for SPFMV. The benefits of this RT-PCR based detection of SPFMV would be simple, rapid and specific.