• Journal of the Korean Wood Science and Technology
• /
• v.26 no.2
• /
• pp.51-58
• /
• 1998

Structural changes of cellulosic fibres during the papermaking process were studied by analysis of FTIR spectra collected by the transmission method. The spectra were obtained from a carefully prepared handsheet, using a special infra-red (IR) cell suitable for evacuating the sample. The deconvolution technique was also applied for sharpening the FTIR spectra in the frequency range of the OH and CH stretching bands, which gave detailed information on the structural changes of cellulose. The intensity of some bands was decreased by predrying the sample as a result of the removal of adsorbed moisture. An increase in intensity of some bands in the frequency range of 3700 to $3200cm^{-1}$ was shown at a higher beating level. This increase in intensity was caused by changes in the crystal domain of cellulose resulting from the exposure of the crystalline area on the fibre surface.

• Korean Journal of Optics and Photonics
• /
• v.7 no.2
• /
• pp.112-119
• /
• 1996

TM polarized photon tunneling time and the position where TM photons appear after two-dimensional tunneling in a frustrated total internal reflection (FTIR) structure are calculated. This is done by converting the FTIR tunneling problem of TM photons to an electron tunneling problem with a position-dependent effective mass for a heterostructure potential barrier. Derived results are compared with TE photon cases.

• Polymer(Korea)
• /
• v.26 no.6
• /
• pp.752-758
• /
• 2002

FTIR, FT-Raman, and X-ray diffraction techniques were used to determine chain segregations and lamellar structures of the mixed binary n-paraffins with different chain lengths. The results of three different techniques, infrared spectroscopic studies of crystal field splitting, the Raman longitudinal acoustic mode, and the SAXS long period measurements were compared one another to understand the crystallization mechanism of separated or mixed n- paraffin lamellae.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.6 no.6
• /
• pp.218-225
• /
• 1998

FTIR spectroscopy, useful technology for simultaneous and continuous measurement of the various components of the automotive exhaust gas, is utilized to investigate catalytic reaction charactristics of methane and a few unregulated exhaust emissions of NGV. Major findings are (1) catalytic reaction characteristics of methane measured in unsteady states of varying temperature are similar to those measured in steady states, (2) about 24 % of NO was oxidized to $NO_2$ as soon as they encounter catalysts, (3) study of formaldehyde suffers from difficulties in measurement due to the proximity in wavenumber of formaldehyde and methane, and requires an analyzer of higher resolution and accuracy than used in this study.

• Proceedings of the Optical Society of Korea Conference
• /
• 2005.02a
• /
• pp.348-349
• /
• 2005

• Proceedings of the Optical Society of Korea Conference
• /
• 2004.07a
• /
• pp.286-287
• /
• 2004

• Proceedings of the Optical Society of Korea Conference
• /
• 2004.02a
• /
• pp.30-31
• /
• 2004

• Proceedings of the Optical Society of Korea Conference
• /
• 2006.02a
• /
• pp.213-214
• /
• 2006

• Bulletin of the Korean Chemical Society
• /
• v.30 no.2
• /
• pp.467-470
• /
• 2009

• Proceedings of the Optical Society of Korea Conference
• /
• 2002.11a
• /
• pp.250-251
• /
• 2002