• Journal of Magnetics
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• 제7권4호
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• pp.147-150
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• 2002

The pinning direction, the spin flop behaviors and the magnetoresistive properties in top synthetic spin valve structure [NiFe/CoFe/Cu/CoFe (t$_{p2}$)/Ru/CoFe (t$_{p1}$)/IrMn] were investigated. The magnetoresistive and pinning characteristics of synthetic spin valves strongly depended on the differences in the two pinning layer thickness, ${\Delta}t(=t_{p2}-t_{p1})$. In contrast to the conventional spin valves, the pinning direction (P1) was canted off with respect to the growth field axis with ${\Delta}t$. We found that the canting angle ${\Phi}$ had different values according to the annealing field direction and ${\Delta}t$. When the samples were annealed at above the blocking temperature of IrMn with zero fields, the canted pinned layer could be set along the growth field axis. Because the easy axis which was induced by the growth field during deposition is still active in all ferromagnetic layers except the IrMn at $250{^{\circ}C}$, the pinning direction could be aligned along the growth field axis, even in 0 field annealing.

• 천문학회보
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• 제35권1호
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• pp.59.1-59.1
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• 2010

We present wide-field near-IR imaging polarimetry of 30 Doradus, using the InfraRed Survey Facility(IRSF) 1.4 m telescope at the South African Astronomical Observatory. We obtained polarimetry data in J, H, and Ks bands using the JHKs-simultaneous imaging polarimeter SIRPOL. 30 Doradus is located in the Large Magellanic Cloud(LMC) and it is the most active starburst region known in the Local group of galaxies. 30 Doradus is one of the best field to examine the behavior of the interstellar medium and star-formation mechanism under different conditions. We will investigate the structure of magnetic field in 30 Doradus region.

• 식물조직배양학회지
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• 제24권3호
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• pp.149-152
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• 1997

토양 방선균(Streptomyces sp.)으로부터 페튜니아 캘러스의 생장을 억제하는 물질을 탐색하기 위하여 400 균주의 배양액을 대상으로 활성을 조사하였다. 방선균 9602 균주의 배양액으로부터 캘러스 생장억제물질을 용매분획과 2차의 실리카겔 칼람 크로마토그라피를 사용하여 활성물질을 분리하였다. 활성물질은 1H-NMR, EI-MS, IR, UV 등을 사용하여 2,5,7-trihydroxy-3-(5'-hydroxyhexyl)-1,4-naphthoquinone(3-OH NQ)으로 동정하였다. 3-OH NQ는 페튜니아 캘러스 생장을 $32\mu\textrm{g}$/mL 농도에서 50% 억제하였다.

• 대한화학회지
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• 제62권4호
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• pp.269-274
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• 2018

금속산화물 고분자 복합재료전극 제조기법을 수소이온 감응성이 높은 $RuO_2$에 적용하여 표면연마가 가능한 나노 $RuO_2$ 복합재료 pH전극을 제조하였다. $RuO_2$ 함량 53 wt%을 가지는 나노 $RuO_2$ 복합재료 전극의 경우 나노 $IrO_2$ 복합재료 전극과 비슷한 수소이온 감응특성을 나타내었다. pH 1~9의 범위에서 이론치에 가까운 -58.7 mV/pH의 감응기울기, 1초 이하의 감응속도, 평균 $-57.0{\pm}0.3mV/pH$ (n=5)의 표면재생성, 장기 안정성 등 제반 특성과 전기화학적으로 활성이 높은 화학종에 의한 방해효과도 비슷하게 나타났다. 그러나 pH 10 이상의 염기성 용액에서의 감응기울기와 감응속도는 나노 $IrO_2$ 복합재료전극에 비하여 현저히 떨어지는 결과를 보였으며 이는 복합재료 매질 속의 금속산화물 함량에 따른 물리적 성질 차이에 따른 것으로 추측된다.

• 천문학회보
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• 제37권2호
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• pp.74.1-74.1
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• 2012

We observed the radio sources found from the First Look Survey (FLS) field at the 1.4 GHz radio continuum emission with the Very Large Array (VLA) using the A configuration. We identify point sources and multi component sources at ${\geq}4{\sigma}$ level. We also present the submillimeter properties of the selected radio sources in the FLS field from the Herschel/SPIRE 250/350/500/${\mu}m$ and AzTEC 1.1mm surveys. The counterparts of the radio sources at submillimeter for these called 'submillimeter galaxies (SMGs)' are detected at infrared wavelength with the Spitzer MIPS 24 & 70 ${\mu}m$ sources. Based on the MMT/HECTOSPEC red-shift survey, IRS spectroscopy, and SDSS photometric red-shift survey, the radio sources are likely to be the extragalactic sources. Here, we use the star formation rate (SFR) derived from the MIPS 24 and 70 ${\mu}m$ luminosity to compare the measured SFR from the VLA 1.4 GHz luminosity. These results show that a tight correlation between the SFR from the radio luminosity and the MIPS $24{\mu}m$ rather than that from the MIPS $70{\mu}m$ luminosity. Radio and IR correlation is also used to indicate the radio and IR properties of star-formation in the galaxies and active galactic nuclei (AGNs). Using the counterpart sources selected at IR and radio wavelengths, we employ the IR/radio flux ratios to determine the properties and population of the selected galaxies.

• 천문학회보
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• 제31권1호
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• pp.37.2-37.2
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• 2006

• Archives of Pharmacal Research
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• 제15권4호
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• pp.336-342
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• 1992

Ten [$Pd^{II}$(dicarboxylato)(1, 2-diaminocyclohexane)] complexes were prepared after the antitumor-active Pt(II)1, 2-diaminocyclohexane complexes as the cisplatin analogues of palladium series. They were characterized by means of elemental analysis, IR and NMR spectroscopy. As a result, the dicarboxylate ligands were conformed to be chelated with Pd(II) within the scope studied. The stability differences beween the dicarboxylato complexes according to the chelate ring size could not be differentiated due to generally lower thermodynamic stability of the dicarboxylato Pd(II) complexes.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1996년도 춘계학술대회 논문집
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• pp.273-276
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• 1996

Polyphenylenediamine(PPD) film was prepared with dimethylsulfoxide after the synthesis of PPD by chemical polymerization. The molecular structure of conductive polymer synthesized were discussed by using SEM, FT-IR, NMR. The electrical conductivity measurements were carried out at room temperature. The electrical conductivity which was obtained from electrical instrument was 1.98${\times}$10$\^$-2/ S/cm at ambient temperature.

• Journal of Applied Biological Chemistry
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• 제57권2호
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• pp.159-160
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• 2014

An antifungal antibiotic was extracted three times using n-butanol from the culture broth of Bacillus sp. Bioassayguided column chromatography with silica gel and Sephadex LH-20 yielded 62 mg of the original active compound from 1 L of culture broth. The minimal inhibitory concentration values were 25 and $50{\mu}g/ml$ against Pyricularia oryzae and Pellicularia filamentosa, respectively. Based on results obtained from the analysis of the structure of the antibiotic using MS, NMR, and IR spectroscopy, the antifungal antibiotic was shown to consist of only six of fructose.

• 생약학회지
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• 제2권3호
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• pp.121-123
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• 1971

In series of the the development of domestic natural products, the studies were conducted to evaluate the pharmacologically active substances of the roots of Pursatilla koreana, which is a specific plant, widely distributed in this country and known to be effective as antiinflammatory, hemostatic and antidysentric agents in oriental remedies. From the hydrolysis of methanol extract of the root, a triterpenic substance was isolated. It was identified as $hederagenin\;C_{30}H_{48}O_4,\; m.p.\;333^{\circ}{\sim}334^{\circ}$, by the m.m.p. with authentic sample, elemental analysis, IR, mass spectra and the other physico-chemical experimentations.