• 한국염색가공학회지
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• 제19권3호
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• pp.18-25
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• 2007

The fixing behaviors of anthraquinone disperse dyes containing dimethylamino substituent, such as C. I. Disperse Violet 26(D.V.26) and C. I. Disperse Blue 14(D.V.14), or containing diamino substituent, such as C. I. Disperse Blue 73(D.B.73), and monochlorotriazinyl azo reactive dyes, such as C. I. Reactive Orange 13(R.O.13), C. I. Reactive Red 3(R.R.3). C. I. Reactive Yellow 2(R.Y.2) on polyester/cotton blend(P/C) fabrics were examined for the one-step printing of P/C fabrics. The high temperature steaming of $175^{\circ}C$ is the most satisfactory fixing method for P/C one-step printing with above disperse and reactive dyes among the four different fixing methods: $175^{\circ}C$ steaming, $102^{\circ}C$ steaming${\rightarrow}175^{\circ}C$ steaming, $190^{\circ}C$ thermosol, $102^{\circ}C$ steaming${\rightarrow}190^{\circ}C$ thermosol. $190^{\circ}C$ thermosol is unfit to fix R.R.3 and R.Y.2 whose heat stability is poor. It was found that D.V.26 and D.B.14 containing dimethylamino substituent are unstable for heat and alkali, but D.B.73 is stable for them to print P/C blend fabrics with R.O.13 which is also stable for heat. Therefore we found that D.B.73, R.O.13 and a pair of D.B.73 and R.O.13 were very suitable for one-step printing of P/C blend fabrics.

• 센서학회지
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• 제18권3호
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• pp.222-225
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• 2009

This paper describes the fabrication and characteristics of Schottky micro hydrogen sensors for high temperatures by using polycrystalline(poly) 3C-SiC thin films grown on Si substrates with thermal oxide layer using APCVD. Pd/poly 3C-SiC Schottky diodes were made and evaluated by I-V and C-V measurements. Electric current density and barrier height voltage were $2{\times}10^{-3}A/cm^2$ and 0.58 eV, respectively. These devices could operate stably at about 400 $^{\circ}$. The characteristics of implemented sensors have been investigated in terms of sensitivity, linearity of response, response rate, and response time. Therefore, from these results, Pd/poly 3C-SiC Schottky devices have very high potential for high temperature $H_2$ sensor applications.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기물성,응용부문
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• pp.90-92
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• 2001

Carbon monoxide-sensing behavior of Pt-SiC Schottky diodes. fabricated on the same SiC substrate have been systematically compared and analyzed as a function of carbon monoxide concentrati on and temperature by I-V and ${\Delta}I$-t methods under steady-state and transient condition. Adsorption activation energies of Carbon monoxide on the surface of Pt-SiC Schottky diodes is investigated in a high temperature range ($100{\sim}500^{\circ}C$). The optimal temperature for behavior sensing is $300^{\circ}C$ and saturation concentration is 200 ppm.

• 한국염색가공학회지
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• 제15권5호
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• pp.316-320
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• 2003

In order to investigate the dyeing property of poly trimethylene terephthalate(PTT) fabric, the dyeing of PTT fabric was carried at under condition of different dyeing temperature by using several disperse dyes with different energy level. Particularly, this study discussed the PTT dyeing thermodynamically. Used disperse dyes were selected based on the their chemical structure and energy level. The obtained results were as followings; The dye adsorption of S type disperse dye such as C. I. Disperse Blue 79 increased with increasing dyeing temperature. In a exhaustion rate of PTT fabric with disperse dyes, C. I. Disperse Blue 56 showed higher values than that of C. I. Disperse Orange 29 and Blue 79. For the interpretation of thermodynamic dyeing behavior, the partition coefficient ( K ) and some several thermodynamic parameters such as standard affinity$(-\mu^\circ)$ and heat of dyeing$(\Delta{H}^\circ)$ calculated from the adsorption isotherm. From above results, as the energy level of disperse dye is small, the partition coefficient and standard affinity increased. But the heat of dyeing of PTT fabric with disperse dye showed high negative value in order of E type(C. I. Disperse Blue 56), SE type(C. I. Disperse Orange 29) and S type(C. I. Disperse 79).

• Preventive Nutrition and Food Science
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• 제3권2호
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• pp.163-168
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• 1998

Inhibitory effect of indole oligomers induced from indole-3-carbinol(I3C) on the growth of breast cancer cells was studied. We gernerated the reaction mixtures (RXM) at ambient temperature by treating a stirred aqueous solution of I3C (typeically 0.25ml) at a concentration of 12 $\mu$mol/ml) with hydrochloric acid (typically 28$\mu$l of a 1 mmol/ml solution). RXM was fractionated by the column chromatography. The fractions with similar UV-pattern were further fractionated by HPLC and 3.3'-diindoylmethane (DIM) and other indole oligomers were identified. I3C, RXM, and it derived indole compounds were added to MCF-7 cells and cultured in the presence of 10-7M estradiol for 7 days. the growth-inhibitory effect of I3C and DIM on the growth of MCF-7 cell was very strong. The synthetic DIM also revealed antiproliferative effect on MCF-7 cel. The fractions containing high DIM content (77%), were most effective in inhibiting MCF-7 cell growth induced by estradiol. With these results, we suggest that I3C and DIM might have anticarcinogenic effect on the breast cancer.

• 한국컴퓨터정보학회논문지
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• 제7권1호
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• pp.147-153
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• 2002

경영, 설계, 제조, 판매를 총체적으로 결합하는 생산 시스템인 컴퓨터 통합생산시스템 CIM(Computer Integrated Manufacturing System)의 개발이 이루어졌다 CIM에서는 경영 설계, 제조, 판매 등을 컴퓨터를 통하여 유기적으로 연결함으로써 빠른 시장변화에 따른 대응을 시도하고 있다 각 시스템간의 정보전달과 실제작업의 지시 및 동작은 정보네트워크에 의해 순간적으로 이루어지며 각 서브시스템에서 공유화되고 정확성, 신속성이 발휘되어 원가절감이나 품질향상, 납기준수 등에 기여하여야 한다. 본 연구의 목적은 CIM의 구축입안, 설계, 도입, 운용, 갱신 등의 어느 단계에 있어서도 적절한 평가를 행하는 것이다.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2000년도 High Temperature Superconductivity Vol.X
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• pp.248-251
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• 2000

The fabrication and characteristics of HTS race-track type field coil for generators was carried out. Field coils are composed of 3 pancake coils wound by 37-filamental Bi-2223/Ag-alloy tapes. The winding machine is horizontal type. The critical currents (I$_c$) of the superconducting tapes were measured with variation of bending strain and external magnetic fields. I$_c$ of both whole field coils and 3 pancake coils were measured as a function of temperature. At 77K under the self-field, I$_c$ of whole field coils was 12A, while in the case of middle pancake coil, I$_c$ was 15A. The distribution of magnetic field B was obtained, using 3-D FEM. Our simulation showed that maximums of B${\bot}$A in x-y plane were locally distributed in both the upper and the lower coils. In addition, the fabrication processes and the characteristics of field coil are described.

• 한국초전도ㆍ저온공학회논문지
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• 제13권4호
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• pp.22-25
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• 2011

A single-coat $YBa_2Cu_3O_{7-{\delta}}$ (YBCO) film of high critical currents ($I_c$) could be successfully fabricated by optimizing the viscosity of the coating solution in the metal-organic deposition (MOD) process. From a Ba-deficient coating solution (Y: Ba: Cu = 1: 1.5: 3) having the viscosity of 212 $mPa{\cdot}sec$, 0.9 ${\mu}m$-thick single coat YBCO film with the $I_c$ value of 289 A/cm-width ($J_c$ = 3.2 MA/$cm^2$) at 77 K was achievable on the $SrTiO_3$ (STO) substrate, which was superior to that of our previous report for 0.8 ${\mu}m$-thick single coat YBCO film from a stoichiometric coating solution (Y: Ba: Cu = 1: 2: 3) on the $LaAlO_3$ (LAO) substrate. This result might be attributed to denser and more homogeneous microstrcuture in the case of the YBCO film from the Ba-deficient coating solution.

• 한국초전도ㆍ저온공학회논문지
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• 제12권2호
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• pp.9-12
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• 2010

A lamination system using reflow soldering was developed to enhance the mechanical properties of high temperature superconductor (HTS) tape. The laminated coated conductor tape was fabricated using the continuous lamination process. The mean, maximum, and minimum tensile loads in a T-peel test of the laminated coated conductor were 9.9 N, 12.5 N, and 7.6 N, respectively. The critical current ($I_c$) distributions of the non-laminated and laminated coated conductor were compared using anon-contact Hall probe method. The transport $I_c$ nearly matched the non-contact $I_c$; however, some degraded Ic regions were found on the length of 800 cm of laminated coated conductor. We confirmed that the cause of the partially degraded $I_c$ was due to an increase in line tension by (1) solidification induced by a change of composition that usually occurs in molten brass (Cu, Zn) in solder, or (2) non-homogeneity of the thickness of the coated conductor or metal tapes. We suggest that reflow soldering is a promising method for reinforced HTS tape if the controlling solder thickness and lamination guide are modified.

• 한국식품영양학회지
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• 제27권6호
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• pp.1051-1058
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• 2014

재래유자(C. junos I), 개량종 I(C. junos I+Poncirus trifoliata), 개량종 II(Citrus junos I+C. junos II) 세 가지 유자의 종류별 수확시기에 따른 유리당, 헤스페리딘, 나린진, 플라보노이드 함량과 항고혈압 활성을 알아보고자 실험을 수행하였다. 수확시기가 늦을수록 산도는 감소하고 당도는 증가하여 당산비는 증가하였고, 포도당, 서당은 수확시기에 따른 변화가 크지 않았으나, 과당은 유자가 충분히 익는 11월에 급격히 증가함을 보여주었다. 개량종 II는 10월 수확한 과피에서, 재래종은 10월 수확한 과즙에서 다른 품종보다 총 플라보노이드가 높았으며, 유자 과피의 hesperidin과 naringin은 유자가 미성숙했을 시기인 7월에 가장 높았고, 급격히 감소하고 있었다. 총 플라보노이드 중에서 hesperidin과 naringin이 차지하는 비율도 미숙과인 7월보다 11월에 현저히 감소하는 것으로 나타났다. ACE 저해 효과는 과즙과 과피에서 모든 수확시기에서 높게 나타났다. 과즙보다 과피에서 높게 나타났으며 품종별, 수확 시기별 차이는 관찰되지 않았으나 제철 11월에 수확한 재래종 과피에서 ACE 저해 효과가 가장 높았다. 따라서 hesperidin과 naringin을 이용하고자 할때는 미숙과를, 당도나 ACE 저해 효과를 이용하고자 할 때는 완숙과를 이용하는 것이 타당할 것으로 보인다.