• Journal of the Korean Society of Clothing and Textiles
• /
• v.22 no.4
• /
• pp.535-542
• /
• 1998

Cotton fabrics were treated with BTCA, which is used to improve the wrinkle recovery property of cotton fabrics. BTCA, with varying its concentrations, was treated on cotton fabrics by pad dry-cure technique. BTCA contents in treated cotton fabrics were determined by the weight gain and the FT-lR spectrometer. The effects on the sorption and physical properties of BTCA treated fabrics were investigated. IR spectra showed that ester-crosslinks were produced in BTCA treated cotton fabrics. And as increasing the concentration of BTCA, ester-crosslinks are increased in amorphous regions of fabrics. Moisture regain and water imbibition of treated fabrics were reduced. But, they were increased over a certain concentration. Dye sorptions also were reduced, but they were similar over 6% BTCA. When BTCA was treated on cotton fabrics, DP rating and wrinkle recovery angle were improved. On the other hand, strength retentions of treated fabrics were lower than untreated fabrics. Stiffness was increased.

• Journal of the Korean Applied Science and Technology
• /
• v.22 no.3
• /
• pp.228-233
• /
• 2005

Langmuir-Blodgett(LB) technique can speak the best candidate of the future molecular electronic devices. But, precursor as molecular ultrathin film devices require the bulk property that are influenced by the molecular orientation. So, this device is one of current interest in molecular electronic device development of new materials. In this study, quantitative evaluation of molecular orientation in LB films of polyamic acid alkylamine salt was performed analysis experiment comparing the absorption or transmission intensity of the FT-IR spectrometer and reflection or absorption spectra with UV-visible absorption spectra. It could find that the polar angle(${\theta}$) of the dipole moment appears in about $68^{\circ}$ and the tilting angle of the alkyl chain is about $11.5^{\circ}$.

• Proceedings of the Korean Society of Applied Pharmacology
• /
• 1994.04a
• /
• pp.175-175
• /
• 1994

녹용의 유효성분을 분리하기 위하여 지질성분을 분석하고 그 약효를 검색하였다. Folch-Suzuki 분배법, Sephadex G-50, DEAE-Sephadex A-25 Column Chromatography, High Performance Thin Layer Chromatography, HPLC로 정제한후 Mass Spectrometer, NMR, FT-IR등을 이용하여 구조를 분석하였다. 이 물질은 분자량이 1065인 polyhydroxyunsaturated lipid임을 확인하였다. Strepthzotocin으로 당뇨병을 유발시킨 쥐에 이 물질을 투여한 후 혈액과 조직에서 생화학적 변화를 조사하였다. 정상군에 비해 투여군에서 혈당이 감소하였으나 혈액에서 insulin의 양은 증가하지 않았다. 당뇨병 쥐의 적혈구가 정상에 비해 용혈이 되지 않으나 투여군의 적혈구는 정상과 비숫한 용혈현상을 보여 주었다. 대뇌조직에서 gangliosides를 분석한 결과 당뇨병에 의해 GM1이 증가하는 양상을 보여 주었으나 투여군의 경우 대뇌 gangliosides 분포는 정상과 같았다. 대뇌 lipid bound sialic acid를 정량한 결과 당뇨병에 의해 그 양이 감소되었으나 녹용을 투여하였을 때는 정상에 비해 그 양이 더 증가하였다. Strepthzotocin으로 유발시킨 당뇨병 쥐에 녹용의 지질성분을 투여하였을 때 치료효과가 있는 것으로 추정된다.

• International Journal of Industrial Entomology and Biomaterials
• /
• v.31 no.2
• /
• pp.127-131
• /
• 2015

Oak silkworm, Antheraea yamamai (A. yamamai), has been used for clothing and surgical suture and considered as biomaterial due to RGD tripeptide. This paper reported the degumming conditions of A. yamamai using sodium oleate, high pressure and temperature, and sodium carbonate. Degumming ratio of A. yamamai cocoon using sodium oleate was less than 10%. High pressure and temperature treatment induced 30% weight loss of A. yamamai cocoon. The concentration, treatment temperature and time using sodium carbonate was examined and revealed the following conditions for degumming; 5% owf, 60 min at 100℃. The degummed solution was confirmed using UV and FT-IR spectrometer. Our results can be used to handle A. yamamai silkworm cocoon for further application including material processing.

• Journal of Integrative Natural Science
• /
• v.3 no.3
• /
• pp.157-161
• /
• 2010

New low temperature synthesis of germanium nanoparticles obtained from the reaction of germanium tetrachloride and sodium/benzophenonewere developed. These germanium nanoparticles terminated with chloride group were oxidized in air to give hydroxy-terminated germanium nanoparticles. Germanium nanoparticle containing 20(S)-camptothecin (CPT) for a noble drug delivery system were developed. FT-IR spectroscopy was used for the characterization of vibrational absorption for the germanium nanoparticle and oxidized germanium nanoparticles containing camptothecin. Electronic absorption and fluorescence properties were measured with UV-Vis and fluorescence spectrometer. The morphology of oxidized germanium nanoparticles containing camptothecin was investigated by using TEM.

• Journal of Integrative Natural Science
• /
• v.3 no.4
• /
• pp.237-240
• /
• 2010

Recently, number of studies for porous silicon have been investigated by many researchers. Multistructured porous silicon (PSi), distributed Bragg reflector (DBR) PSi, has been a topic of interest, because of its unique optical properties. DBR PSi were prepared by an electrochemical etch of $P^{{+}{+}}$-type silicon wafer of resistivity between 0.1 $m{\Omega}cm$ with square wave current density, resulting two different refractive indices. In this work, We have fabricated a simple and portable organic vapor-sensing device based on DBR porous silicon and investigated the optical characteristics of DBR porous silicon. DBR porous silicon have been characterized by FT-IR, Ocean optics 2000 spectrometer. The device used DBR PSi chip has been demonstrated as an excellent gas sensor, showing a great senstivity to a toxic vapor (TEP, DMMP, DEEP) at room temperature.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2010.02a
• /
• pp.239-239
• /
• 2010

Cobalt (Co) 박막은 낮은 저항과 우수한 열적 안정성에 의해 금속 배선공정에서 copper의 확산 및 산화를 방지하기 위해 사용된다. Co 박막을 증착하기 위해서는 유기화학 증착법이 많이 사용되고, 이를 위해 많은 Co 전구체들이 연구되어지고 있다. 본 연구에서는 $Co(hfac)_2$ 전구체의 플라즈마 및 반응가스에 따른 기상상태의 변화와 증착공정에서 발생되는 입자의 크기와의 상관관계를 연구하였다. 실험의 변수로 반응가스 ($H_2$, $H_2O$)와 플라즈마 파워 (0~50W)를 사용하였다. 또한 Co 전구체의 기상분해 및 반응을 분석을 위해 fourier transform infrared (FT-IR) spectroscopy를 사용하였다. 그리고 기상상태의 변화가 입자 형성에 끼치는 영향을 관찰하기 위해 저압에서 실시간으로 나노입자를 측정할 수 있는 장비인 particle beam mass spectrometer (PBMS)를 활용하였다.

• Journal of Radiation Industry
• /
• v.5 no.3
• /
• pp.243-247
• /
• 2011

In this study, a convenient method for the selective immobilization of single strand DNA (ssDNA) on a polymer surface was described. A positively charged polyelectrolyte, poly(diallyldimethylammonium chloride) (PDDA), was spin-coated on a tissue culture petridish and the micropatterns of the PDDA were formed by selective ion implantation through a pattern mask. The surface property of the implanted PDDA was investigated by using a surface profiler and FT-IR spectrometer. Cy3-labeled ssDNA was selectively immobilized on the PDDA patterns through ionic interaction and thus, well-defined ssDNA patterns were obtained.

• Bulletin of the Korean Chemical Society
• /
• v.13 no.5
• /
• pp.520-526
• /
• 1992

The intramolecular fundamental vibrations of $CH_3CN$ trapped in solid argon matrix have been reinvestigated by means of FT-IR spectroscopy in the spectral range of 4000-500 $cm^{-1}$. By employing a quantum detector, infrared spectra could be obtained at matrix to solute ratio of 10000, allowing the clarification of the peaks due to monomeric species more clearly. Temperature controlled diffusion was initiated to identify the dimeric and polymeric species in terms of difference spectra. The assignments of monomeric and dimeric species are found, in general, to agree with the earlier work performed at higher concentration (Ar/$CH_3CN$ = 1500) using a dispersive spectrometer. Nonetheless the difficulty of minute differences between the earlier infrared and Raman spectroscopic results could be resolved. Moreover, the previously unnotified peaks due to polymeric species have been identified.

• Bulletin of the Korean Chemical Society
• /
• v.18 no.11
• /
• pp.1153-1158
• /
• 1997

The powder characteristics of LiMn2O4 prepared by the citrate sol-gel method have been investigated. The optimum pH for the preparation of homogeneous citrate gel was calculated by the theoretical consideration of thermodynamic equilibrium constants for metal-citrate complexes and metal salts. The obtained citrate gel was prefired at 300 ℃ and calcined at 300-700 ℃ for 1 h. The obtained powders were characterized by TG/DSC, FT-IR spectrometer, X-ray diffractometer, SQUID magnetometer, SEM, and particle size analyzer. It was observed that the mixed phases of spinel LiMn2O4 and Mn3O4 were transformed into spinel LiMn2O4 phase and the vibrational bands due to the carbonate and nitrate were also disappeared over 400 ℃. At temperatures below 150 K, inverse molar susceptibilities of every sample began to show an antiferromagnetic ordering of Mn magnetic moments.