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Parametric Model Dielectric Functions of InAs for Temperatures from 22 to 675 K
김태중,황순용,변준석,Mangesh S. Diware,Jun Young Kim,김영동 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.11
Dielectric functions as a continuous function of temperature are useful for nondestructive in-situ monitoring of deposition and device design. Here, we present an analytic expression that accurately represents the dielectric function ε = ε<SUB>1</SUB> + <i>i</i>ε<SUB>2</SUB> of InAs from 0.74 to 6.54 eV for temperatures from 22 to 675 K. We use the parametric model, which is known to accurately portray ε without unphysical assumptions. The parameters are obtained from ε spectra obtained on an InAs substrate by spectroscopic ellipsometry. The dielectric function is parameterized successfully by seven Gaussian-broadened polynomials.
NADH oxidase(nox) 유선자의 PCR- RFLP를 이용한 돼지 intestinal spirochetes 국내분리주의 동정
김태중,김명희,나영란,정석찬,이재일,Kim, Tae-Jung,Kim, Myoung-Hee,Na, Young-Ran,Jung, Suk-Chan,Lee, Jae-Il 대한수의학회 2004 大韓獸醫學會誌 Vol.44 No.4
In this study, we performed a PCR-RFLP analysis of NADH oxidase gene(nox) for the characterization of porcine intestinal spirochetes isolated from Korea by the comparison with Brachyspira hyodysenteriae and B. pilosicoli reference strains. Eleven strains including four reference strains, B. hyodysenteriae B204, B234, B169, B. pilosicoli P43/6/78 and seven Korean isolates were used. PCR products of 939 bp were amplified using nox-specific primers and digested with two restriction enzymes, Bfm I and Dpn II. In study using Bfm I, both strains showed no difference in fragmented size(197 and 741 bp). When use Dpn II, B. hyodysenteriae showed two bands(209 and 684 bp), however B. pilosicoli showed a single band of 896 bp. Our results indicate that nox-specific PCR-RFLP could be used as a typing method of Brachyspira species and as an epidemiological method for identifying spirochetes isolated from swine.
MC1R 유전자의 PCR-RFLP를 이용한 한우육과 젖소육/black Angus 수입육의 구분
김태중,이재일,Kim, Tae-Jung,Lee, Jae-Il 대한수의학회 2005 大韓獸醫學會誌 Vol.45 No.3
The melanocortin 1 receptor (MC1R) plays an important role in regulation of melanin pigment synthesis within mammalian melanocytes. Mutations within the gene encoding MC1R have been shown to explain coat color variations within several mammalian species including cattle. To develope a rapid and accurate method for the identification of Hanwoo, we performed a modified PCR-RFLP analysis of MC1R gene using single nucleotide polymorphism (SNP) within MC1R as a target. A size of 538 bp (537 bp for Hanwoo) was amplified by PCR, digested with Hpa II, and electrophoresed on a 1.5% agarose gel. A PCR product from Hanwoo showed a single band of 537 bp, whereas two fragments of 328 bp and 210 bp were detected in both Holstein and Black angus. The current result suggests that the PCR-RFLP using our primers and enzyme digestion system would be very accurate, easy and reproducible method to discriminate between Hanwoo and Holstein/Black angus meat.
국내의 개에서 Brachyspira pilosicoli의 분리 및 동정
김태중,이재일,Kim, Tae-Jung,Lee, Jae-Il 대한수의학회 2004 大韓獸醫學會誌 Vol.44 No.3
This study was performed to report the outbreaks of canine intestinal spirochetosis and to characterize the canine isolates. Three canine isolates were weakly beta-hemolytic and had sharp end shape with 5 flagella. Isolates didn't produce indole but fermented fructose. In $API-ZYM^{(R)}$ study, isolates were alpha-glucosidase negative and alpha-galactosidase positive, which is the typical characteristics of B. pilosicoli. In multilocus enzyme electrophoresis(MEE) study, isolates were divided into 2 electrophoretic types. Isolates showed different properties with B. hyodysenteriae but closely related with pathogenic canine intestinal spirochete(B. pilosicoli). This is the first report of the isolation and characterization of canine intestinal spirochete in Korean dogs.
대장균에서 흉막폐렴균 독소 Apx I과 Apx II의 대량발현
김태중,이봉주,이재일,Kim, Tae-Jung,Lee, Bong-Joo,Lee, Jae-Il 대한수의학회 2005 大韓獸醫學會誌 Vol.45 No.2
Actinobacillus pleuropneumoniae is the causative agent of a porcine contagious pleuropneumonia. Among several virulence factors including exotoxin (Apx toxins), LPS, transferrin-binding proteins, OMPs, and some proteases, Apx toxins have been major targets for the protection study. In this study, cloning and expression of A. pleuropneumoniae Apx I and Apx II toxin, which are produced by all highly virulent strains, were performed by Escherichia coli expression system. Genes coding Apx I and II toxin were amplified from the A. pleuropneumoniae serotype 5 genomic DNA using polymerase chain reaction and cloned to a prokaryotic expression vector, pRSET. Expression of the Apx I and Apx II coding sequences in E. coli resulted in the formation of insoluble inclusion bodies purified according to a denaturing purification protocol, which employs the use of guanidium. Recombinant proteins were purified using $Ni^{2+}$-charged resin affinity purification. This expression and purification system made it possible to produce Apx I and Apx II in large amounts for further immunologic studies.
김태중,장은진,김종수,이재일,Kim, Tae-Jung,Jang, Eun-Jin,Kim, Jong-Su,Lee, Jae-Il 대한수의학회 2006 大韓獸醫學會誌 Vol.46 No.1
Iridovirus is an icosahedral cytoplasmic double-stranded DNA virus with a genome size of 170-200kb. Outbreaks of fish iridovirus infection are characterized by their wide geographic distribution and broad host spectrum, especially in water temperatures of $25-27^{\circ}C$ Recently, the causative agent of high mortalities in flounder (Paralichthys olivaceus) was identified as fish iridovirus in Korea. Iridoviral infection repeatedly occurs in the same area for long periods, suggesting the possibility of viral infection in nursery. To examine this, the existence of iridovirus in juvenile flounders was detected by PCR using virus-specific primers. Antibodies induced against this virus were also examined using ELISA. As a result, juvenile fish in nursery were found to be previously infected with iridovirus, suggesting that proper prevention systems are required.
Temperature Dependence of the Dielectric Function and Critical-point Energies of InAs
김태중,황순용,Jun Seok Byun,Nilesh S. Barange,Jun Young Kim,김영동 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.1
We report the complex dielectric function of InAs for energies from 0.74 to 6.54 eV and temperatures from 22 to 675 K. The complex dielectric function was determined by using spectroscopic ellipsometry. The critical-point (CP) structures at low temperatures are blue-shifted and are sharpened significantly relative to those observed at high temperatures, which can be explained by using the reduction of the electron-phonon interaction and the thermal expansion. The CP energies are determined by using lineshape fittings to numerically calculated second energy derivatives of the dielectric function. The obtained CP energies are fit to a phenomenological expression that contains the Bose-Einstein statistical factor and to a linear equation.
김태중,Kim, Tae-Jung 한국과학기술정보연구원 2004 지식정보인프라 Vol.13 No.-
성과확산과 정책연구는 지금까지의 관점에서 보면 상호 연과성이 없는 듯하나 서로 매우 긴밀한 연관 관계가 있다. 각계의 이용자들이 구축된 인프라를 이용하면서 느끼는 KISTI에 대한 반응을 정책에 반영하여 이용자의 의견을 국가 정책 및 기관의 발전 방향에 반영하기 위한 것으로 한층 성숙된 이용자의 만족도 제고 및 정책개발이 가능할 것으로 기대된다.
김태중,Young Dong Kim,J Kossut 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.3
We investigate the pseudodielectric functions h"i of Cd1¡xMgxTe ternary alloy .lms of composi- tions x = 0.00, 0.23, 0.31, and 0.43 by using vacuum ultraviolet spectroscopic ellipsometry (SE) in the spectral range from 0.7 to 9.0 eV at room temperature. We observed three new critical point energies in the spectral range from 5.5 to 8 eV whose observation by using SE had not been pre- viously reported. Based on a reported band structure calculation, we interpreted that these three peaks as ¢v 5 ¡¢c 5, Lv 4;5¡Lc 6, and Lv 6 ¡Lc 4;5 transitions. The values of the three critical point energies and their x dependences were determined from numerically calculated second energy derivatives of the data.&
김태중,Young Dong Kim,Ae Jin Choi,Sun Young Lee 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.3
We present the optical properties of zinc-blende CdSe and ZnSe films, which have been determined by using vacuum ultra-violet spectroscopic ellipsometry (SE) whose spectral range is from 0.7 to 9.0 eV at room temperature. We observed new critical point energies, whose observation by SE has not been reported so far, in the spectral range above 6 eV. We interpret these new peaks as a previously reported transition from a band-structure calculation. The values of the critical point energies were determined from numerically calculated second energy derivatives of these data.