• 대한기계학회논문집
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• 제14권5호
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• pp.1300-1310
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• 1990

본 연구에서는 양각과 레이놀즈수를 변화시켜 가면서 사각관 각 면에서의 국 소물질전닭계수를 측정하여, 유동의 정체, 가속, 박리, 재부착, 와류유출등의 복잡한 유동현상이 물질전달에 미치는 영향을 고찰하고자 한다. 한편 Igarashi의 열전달 측 정 결과와 비교하여 열전달과 물질전달의 유사성을 고찰하고, 복잡한 유동이나 3차원 유동영역에서의 열전달해석에 나프탈렌승화법을 이용한 물질전달실험의 응용 가능성을 검토하고자 한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2004년도 SMICS 2004 International Symposium on Maritime and Communication Sciences
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• pp.36-37
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• 2004

$\alpha$-Chloromethylnaphthalene is a valuable compound for obtaining of the plant growing stimulator - $\alpha$-napthylacetic acid. Chloromethylation of naphthalene by paraformaldehyde in the presence of glacial acetic acid, phosphoric and hydrochloric acids at temperature 80-85$^{\circ}C$ and duration - 6 hours the $\alpha$-chloromethyl-naphthalene yield was 55-57%. Using Box-Wilson method for mathematical planning of experiment carried out optimization of its synthesis for purpose increasing $\alpha$-chloromethylnaphthalene yield. Preliminary, one - factor experiments were carried out for selecting independence main parameters influencing on the synthesis. A full factor experiment of 2$^3$with extended matrix of planning was used for optimization. Aiming to increase the $\alpha$-chloromethylnaphthalene yield, the obtained mathematical model was used for program of sharp raising on the reply surface. The received optimal conditions for the $\alpha$-chloromethylnaphthalene synthesis were selected as following: molar ratio of naphthalene - parapfsormaldehyde of 1 : 2; temperature -105$^{\circ}C$; duration of the reaction -3 hours. The yield of $\alpha$-chloromethylnaphthalene under these optimal conditions was 75 %.

• 한국표면공학회지
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• 제39권1호
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• pp.13-17
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• 2006

The effects of an organic additive, naphthalene trisulfonic acid (NTSA), contained in the nickel sulfamate bath on the surface properties of the electrodeposited nickel layer were investigated through electrochemical technique, x-ray diffraction analysis, and microscopic observation. The addition of NTSA facilitated the oxidation process of electrodeposited nickel layer during anodic scan and also increased the hardness and internal stress of the nickel film as the applied current density became higher. It seems that NTSA modulated the deposit structure during electrodeposition and so induced higher distribution of (110) orientation with respect to (200). With the increase of the NTSA in the bath, nickel layer was formed in small grain size, which resulted in enhanced surface evenness and brightness.

• 한국재료학회지
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• 제19권9호
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• pp.510-515
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• 2009

The compound of 2,6-Bis[(9-phenylcarbazolyl)ethenyl]naphthalene (BPCEN-1), 2-[6-{1-Cyano-2-(9-phenylcarbazoly)vinyl}naphthyl]-3-(9-phenylcarbazolyl)acrylonitrile (BPCEN-2), 2,6-Bis[{4-(1-naphthy l)phenylamino} styrenyl] naphthalene (BNPASN-1), 2-[6-{1-Cyano-2-(naphthylphenylaminophenyl) vinyl}naphthyl]-3-(naphthylphenylaminophenyl)acrylonitrile (BNPASN-2) was analyzed electrochemically and spectroscopically and can be obtained by bonding phenylcarbazolyl, naphthylphenylaminophenyl and -CN ligands to 2,7-naphthalene. The electrochemical and spectroscopic study resulted in the P-type (BPCEN-1, BNPASN-1) being changed to N-type (BPCEN-2, BNPASN-2) according to -CN bonding despite having the same structure. The value of band gap(Eg) was revealed to be small as HOMO had shifted higher and LUMO lower. The Eg value for naphthylphenylaminophenyl ligand was reduced because it has a smaller HOMO/LUMO value than that of phenylcarbazolyl from a structural perspective. The electrochemical HOMO/LUMO values for BPCEN-1, BPCEN-2, BNPASN-1, BNPASN-2 were measured to be 5.55eV / 2.83eV, 5.73eV / 3.06eV, 5.48eV / 2.78eV, and 5.53eV / 2.98eV, respectively. By -CN ligand, the UV max, Eg and PL max were shifted to longer wavelength in their spectra and the luminescence band could be also confirmed to be broad in the photoluminescence (PL) spectrum.

• 한국산학기술학회논문지
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• 제7권4호
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• pp.749-752
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• 2006

집먼지진드기는 호흡기 알레르기 질환 즉, 소아 천식, 알레르기성 비염, 아토피 피부염 등의 가장 중요한 기인항원으로 알려져 있다. 본 연구는 일반 살충제로 알려진 나프탈렌이 먼지진드기에 대해서도 유의한 살충효과를 나타내는지를 확인하기 위해 실시되었다. 페트리디쉬에 5 g의 혼합배지를 넣고 나프탈렌 농도를 달리한 6개의 그룹을 설정한 후 살아있는 세로무늬 먼지진드기 20마리씩을 분주하여 $25^{\circ}C$, 상대습도 75% 조건에서 4 주간 배양하였다. 그룹별 나프탈렌 농도에 따른 회수 된 먼지진드기의 개체수는 0 mg에서 (대조군) 191.5, 1 mg에서 24.3, 2 mg에서 1.3, 3 mg에서 1.3 이었고, 5 mg 및 10 mg 그룹에서는 살아있는 먼지진드기가 회수되지 않았다. 이상으로 나프탈렌은 실험실적 조건에서 세로무늬 먼지진드기에 대한 살충효과가 있는 것으로 확인되었다.

• 청정기술
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• 제13권1호
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• pp.72-78
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• 2007

석유 잔사유(PGO)에 포함된 유효성분을 분리하기 위한 기초 연구로 컬럼 및 봉형 용융 결정화기를 사용하여 나프탈렌에 불순물로 2-메틸나프탈렌, 인덴, 1-메틸나프탈렌을 각각 포함시킨 혼합물에 관한 분리정제 연구를 수행하였다. 결정화시, 나프탈렌의 순도는 냉각속도가 낮거나, 융점이 상대적으로 낮은 불순물이 포함될 수 록 증가하는 경향을 나타내었으며, 동일한 조건에서 컬럼형 결정화기의 순도는 봉형에 비해 결정화후 부분용융에서 순도의 증가에 기인하여 높은 경향을 나타내었다.

• Environmental Engineering Research
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• 제11권4호
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• pp.217-231
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• 2006

The gas-phase formation of polychlorinated naphthalenes (PCNs) and dibenzofurans (PCDFs) was experimentally investigated by slow combustion of the three chlorophenols (CPs): 2-chlorophenol (2-CP), 3-chlorophenol (3-CP) and 4-chlorophenol (4-CP), in a laminar flow reactor over the range of 550 to $750^{\circ}C$ under oxidative condition. Contrary to the a priori hypothesis, different distributions of PCN isomers were produced from each CP. To explain the distributions of polychlorinated dibenzofuran (PCDF) and PCN congeners, a pathway is proposed that builds on published mechanisms of PCDF formation from chlorinated phenols and naphthalene formation from dihydrofulvalene. This pathway involves phenoxy radical coupling at unsubstituted ortho-carbon sites followed by CO elimination to produce dichloro-9, 10-dihydrofulvalene intermediates. Naphthalene products are formed by loss of H and/or Cl atoms and rearrangement. The degree of chlorination of naphthalene and dibenzofuran products decreased as temperature increased, and, on average, the naphthalene congeners were less chlorinated than the dibenzofuran congeners. PCDF isomers were found to be weakly dependent to temperature, suggesting that phenoxy radical coupling is a low activation energy process. Different PCN isomers, on the other hand, are formed by alternative fusion routes from the same phenoxy radical coupling intermediate. PCN isomer distributions were found to be more temperature sensitive, with selectivity to particular isomers decreasing with increasing temperature.

• 한국자원식물학회지
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• 제22권1호
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• pp.26-30
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• 2009

본 연구는 속리산국립공원 내 쌍곡계곡에 분포하는 식물상을 조사하기 위해 수행되었고 조사기간은 2006년 3월부터 2007년 6월까지 조사하였다. 식물상을 조사한 결과, 88과 242속 342종 52변종 7품종 등 총 401분류군이 확인되었다. 한국특산식물은 개비자나무, 키버들, 개족도리, 할미밀망, 민산초나무, 청괴불나무, 병꽃나무, 분취 등 총 8분류군이 조사되었다. 환경부 지정 멸종위기식물은 망개나무 등 1분류군이며, 산림청 지정 희귀식물은 개족도리, 고란초, 망개나무, 백작약, 태백제비꽃, 꼬리진달래, 말나리 등 7분류군이 조사되었다. 이들의 보전을 위해서는 향후 희귀식물에 대한 구체적인 보전방안과 번식방법 등이 논의되어야 할 것으로 판단된다. 자원식물은 관상용 식물 220분류군, 식용 식물 239분류군, 약용 식물 281분류군, 기타용 식물 206분류군으로 나타났다. 귀화식물은 오리새, 소리쟁이, 취명아주, 아까시나무, 붉은토끼풀, 토끼풀, 큰달맞이꽃, 비짜루국화, 붉은서나물, 개망초, 망초, 뚱딴지, 서양민들레 등 13분류군이 관찰되었으며, 귀화율은 약 3.24%, 자연파괴도는 약 4.53%로 나타났다.

• 한국초전도ㆍ저온공학회논문지
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• 제19권3호
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• pp.40-43
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• 2017

Carbon coating approach is used to prepare carbon-doped $MgB_2$ bulk samples using low-cost naphthalene ($C_{10}H_8$) as a carbon source. The coating of carbon (C) on boron (B) powders was achieved by direct pyrolysis of naphthalene at $120^{\circ}C$ and then the C-coated B powders were mixed well with appropriate amount of Mg by solid state reaction method. X-ray diffraction analysis revealed that there is a noticeable shift in (100) and (110) Bragg reflections towards higher angles, while no shift was observed in (002) reflections for $MgB_2$ doped with carbon. As compared to un-doped $MgB_2$, a systematic enhancement in $J_c(H)$ properties with increasing carbon doping level was observed for naphthalene-derived C-doped $MgB_2$ samples. The substantial enhancement in $J_c$ is most likely due to the incorporation of C into $MgB_2$ lattice and the reduction in crystallite size, as evidenced by the increase in the FWHM values for doped samples.

• Bulletin of the Korean Chemical Society
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• 제27권10호
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• pp.1593-1596
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• 2006

The polymeric membrane electrodes based on N,N'-bis-pyridin-2-ylmethylene-naphthalene-1,8-diamine as an ion carrier were prepared and tested for the copper-ion selective electrode. The membrane has a linear dynamic range between $10^{-6}$ and $10^{-2}$ M with a Nernstian slope of 29.6 mV per decade, and its detection limit was $10^{-5.62}$M. The potentiometric response is independent of the pH range of 3-5. The proposed electrode showed good selectivity and response for $Cu^{2+}$ over a wide variety of other metal ions in pH 4.0 buffer solutions.