X선 쬐임이 단백질-물 상분리에 미치는 영향

조창호,성승훈,이상수,조건우,Cho, Chang-Ho,Sung, Syng-Hoon,Lee, Sang-Soo,Cho, Kun-woo 배재대학교 자연과학연구소 1999 自然科學論文集 Vol.11 No.1

Lysozyme에 X선 조사는 단백질-물 혼합물의 상분리 온도를 증가시키며, 온도에 따른 광산란량은 증가하였다. 사포닌 첨가는 상분리 온도를 감소시키며, 온도에 따른 광산란량은 현저하게 감소됨을 관측하였다. Phase separation temperature of lysozyme-water mixture increased with X-ray exposure on lysozyme and decreased with impurity of saponin. The intensity of light scattering in lysozyme-water mixture with X-ray exposure on lysozyme decreased as a function as a function of temperature, and decreased with impurity of saponin.

라만 산란에서 다공질 규소의 크기 분석

조창호,서영석,Cho, Chang-Ho,Seo, Young-Seok 배재대학교 자연과학연구소 1999 自然科學論文集 Vol.11 No.1

양극반응 전류밀도와 전류가 흐르는 시간을 변화시키면서 다공질 규소를 제작하여 라만 산란을 관측하였다. 전류밀도가 증가함에 따라 라만 신호의 봉우리가 이동되었고, 반치폭이 증가함을 실험적으로 관측하여 이론적 모델로서 분석하였다. The Raman scattering was studied from the porous silicons which were made by changing anodization current and time. As the current density was increased, it was observed that Raman peak was red shift and the full width half maximum increased, and was analyzed theoretically.

노령층의 말초혈액 참고치에 대한 고찰

조창호 ( Chang Ho Cho ),김창일 ( Chang Il Kim ),박경희 ( Kyong Hee Park ),이숙정 ( Suk Jeong Lee ),조주연 ( Ju Youn Cho ) 대한임상병리사협회 1999 임상혈액검사학회 발표자료집 Vol.5 No.1

1998년 3월부터 1998년 10월까지 60세 이상 건강한 노령층 228명(남:110명, 여:118명)을 대상으로 Coulter Counter Model GEN - S를 이용하여 얻은 노령층의 말초혈액 참고범위는 다음과 같다. 1. 적혈구 수는 남자 3.70 - 5.18 ×10(6)/㎣, 여자 3.43 - 4.64 ×10(6)/㎣ 이었다. 2. 혈색소는 남자 12.2 - 16.5 gm/dL, 여자 11.1-14.4 gm/dL 이었다. 3. 적혈구용적 백분율은 35.5 - 49.0 %, 여자 32.4 - 42.1% 이었다. 4. MCV, MCH, MCHC는 남자가 각각 88.1 - 102.2 fl, 29.8 - 35.0 pg, 32.9 -35.1 %, 여자는 각각 85.5 - 99.5 fl, 28.9 - 34.2 pg, 32.7 - 35.4 % 이었다. 5. 적혈구 분포폭은 남자 11.7-14.0, 여자 11.4 - 13.7 이었다. 6. 혈소판수 및 혈소판 용적비는 남자가 120 - 304×10(3)/㎣, 0.100-0.235 %, 여자는 138 - 317 × 10(3)/㎣, 0.113-0.250 이었다. 7. 평균 혈소판용적 및 혈소판 분포폭은 남자가 7.0 -9.5 fl, 14.7 - 16.4, 여자는 7.1 - 9.8 fl, 14.6 - 16.2 이었다. 8. 백혈구 수는 남자가 4.3 - 9.7 × 10(3)/㎣, 여자는 4.1 - 9.6 × 10(3)/㎣ 이었다. 9. 백혈구 백분율 계산은 호중구, 호산구, 호염기구, 림프구 및 단구는 각각 37.1 - 72.3%, 0.4 - 7.3%, 0.1-1.9%, 19.4-51.4%, 3.5-9.7% 이었다. To establish the hematological reference values in healthy geriatric population, we measured the RBC count, Hgb, Hct, MCV, MCH, MCHC, RDW, Platelet count, Platelet-crit, MPV, PDW, WBC count and Differential count, determined by Coulter Counter model GEN-S in 228(M : 110, F : 118) persons over 60 years. The results were summarized as follows : 1. Reference value of RBC count: 3.70~5.18×10(6)/㎣ in male, 3.43~4.64×10(6)/㎣ in female. 2. Reference value of Hgb : 12.2~16.5 gm/dL in male, 11.1~14.4 gm/dL in female. 3. Reference value of Hct : 35.5~49.0 % in male, 32.4~42.1 % in female. 4. Reference value of MCV : 88.1~102.2 fl in male, 85.5~99.5 fl in female. 5. Reference value of MCH : 29.8~35.0 pg in male, 28.9~34.2 pg in female. 6. Reference value of MCHC : 32.9~35.1 % in male, 32.7~35.4 % in female. 7. Reference value of RDW : 11.7~14.0 in male, 11.4~13.7 in female. 8.

천음속 유동장에 대한 난류모델들의 성능평가

조창호(Chang-Ho Cho),김광용(Kwang-Yong Kim) 한국항공우주학회 2001 韓國航空宇宙學會誌 Vol.29 No.5

CD55, CD59 결핍에 의한 발작성 야간 혈색소뇨종 2례

조창호 ( Chang Ho Cho ),김창일 ( Chang Il Kim ),박경희 ( Kyong Hee Park ),이숙정 ( Suk Jeong Lee ),박은주 ( Eun Ju Park ) 대한임상검사과학회 1998 대한임상검사과학회지(KJCLS) Vol.30 No.3

Paroxymal nocturnal hemoglobinuria(PNH) is a rare, acquired hematologic disease characterized by marrow hypoplasia, pancytopenia, recurrent venous thrombosis and chronic intravascular hemolysis. This disease shows marrow hypoplasia, during which a somatic mutation in a hematopoietic stem cell leads to an abnormal cell clone with deficient or absent membrane glycosylphosphatidylinositoHGPI) anchor. In the disease, clone of abnonnal, correlerrent-sensitive blood cells(RBCs, platelets, granulocytes, lymphocytes and monocytes) coexist with normal blood cells(chimerism), We report two cases of PNH in all third decade of femal. Two cases with PNH was identified through positive Ham``s test and sucrose lysis test. GPI-anchored proteins CD55 and CD59 were studied by flow cytorretry, Case 1 showed slightly deficient CD55 on RBCs, severe deficient CD55 on neutrophile, CD59 on RBCs and neutrophils. Case 2 results nearly normal CD55 on RBCs and neutrophils, but severe deficient CD59 on RBCs and neutrophils. Immunophenotypic analysis of expression of GPI -anchored proteins is replacing the Ham``s test as the standard diagnostic assay for PNH Due to its relatively high sensitivity and specificity, it is particularly helpful in the early stages of disease, or when there is a small numbers of GPI -deficient cells present and also in quantitation of PNH type I, II, III RBCs. In addition, with the recent commercial availability of CL69 analysis by flow cytometry, use of the Ham``s test as a diagnostic assay is no longer recommended.

골프에서 최적의 스윙 동작

조창호(Chang-Ho Cho),이근춘(Kun-chun Lee) 한국코칭능력개발원 2005 코칭능력개발지 Vol.7 No.3

콘크리트 초음파속도의 재령계수 산정

조창호(Cho Chang-Ho) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1

In estimating concrete compressive strength with non-destructive test, age coefficient is applied in using rebound number test as sole method, but ultrasonic pulse velocity is not applied. Although need of applying age coefficient with change of ultrasonic pulse velocity aging effects of concrete must be considered, there is no research on age coefficient. Therefore, this study aims to estimate age coefficient of concrete ultrasonic pulse velocity, measure changes of concrete weight aging effects and provide materials to help physical examination of cancellation effects and estimation of proper concrete compressive strength. As a result of this experiment, variation of age coefficient in initial and long-term age was great and it was found that when concrete compressive strength was estimated with ultrasonic pulse velocity as sole method, application of age coefficient is absolutely needed.

원저(原著) : 간 질환자의 C형 간염항체 및 B형 간염항원 양성율

조창호 ( Chaog-ho Cho ),김창일 ( Chang-it Kim ),박경희 ( Kyung-hee Park ) 대한임상병리사협회 1994 임상수혈검사학회 발표자료집 Vol.1 No.1

In order to elucidate the prevalence of anti-HCV and HBsAg in liver disease patients, we examined anti-HCV and HBV markers in 359 samples from blood donors and 563 samples from liver disease patients using ELA method. The prevalence of anti-HCV in liver disease patients(12.1 %) was significantly higher than that(1.l %) of blood donors(P<0.05). Among blood donors the prevalence of anti-HCV in male(1.5 %) was not significantly higher than that(0.0%) in female. but in liver disease patients, male(14.1 %) was significantly higher than that(6.2%) in female. The positive rate of anti-HCV was significantly increased with age in liver disease patients(P<0.05), but in blood donors was not significantly. Anti-HCV was detected in 48.9 %(23/47) of hepatoma, 9.3 %(17/183) of liver cirrhosis, 8.4 %(28/333) of other chronic hepatitis. Relative risk for HBsAg was 6.98(95 % CI:4.11-11.86) in hepatoma(P<0.05). 3.60(95 % CI:2.86-4.53) in liver cirrhosis, 2.56(95 % CI: 2.10-2.88) in other chronic hepatitis. For anti-HCV, the relative risk in hepatoma was 13.45(95 % CI:8.91-20.32), in liver cirrhosis was 2.54(95 % CI:1.72-3.76), in other chronic hepatitis was 1.89(95 % CI: 1.44-2.49). These findings provide strong evidence that HCV infection is significantly correlated with hepatoma, and may even playa more important role than the hepatitis B virus.

철근콘크리트 넓은보-기둥 접합부의 철판삽입 보강에 따른 구조적 특성

조창호(Cho Chang-Ho),조철희(Cho Cheol-Hee),유명환(Yoo Myung-Hwan),신용석(Shin Yong-Seok) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.9

The focus of study is to improve the seismic resistance and load-carrying capacity of reinforced concrete wide beam-column joints. A series of experiments on performances of reinforced concrete wide beam-column joints with several strengthening methods by applying steel plates were conducted under different conditions. The conclusion is as follows. Reinforced specimens and standard specimens for the comparison of experimental results, reinforcing the strength of the specimens about 2.7?30.9 %, 0.5?36.0 % degree of stiffness and energy dissipation capacity of 1.5?18.5 % accuracy, Shear of beams and columns 0.3?802.3 % higher than the degree subject was based. In comparison of the ductility, strengthened specimens showed relatively larger deformation of yield point. It was judged that the ductility of strengthened specimens didn’t change or decreased to compare with the standard specimens. To sum up the experimental results, the strengthened specimens have improved performances in terms of load-carrying capacity, member stiffness and energy dissipation capacity, it was concluded that the internal strengthening method of reinforced concrete wide beam-column joints by applying steel plates gave excellent in the improvement of the joint under seismic loads.

초격자 다공질규소 표면에서 제 2고조파 발생

조창호,박종대,Cho, Chang-Ho,Park, Jong-Dae 배재대학교 자연과학연구소 2002 自然科學論文集 Vol.12 No.1

Second harmonic generation was measured in porous silicon superlattices surface which were made by changing and anodization current density and the anodization time periodically in the process of obtaining porous silicon. The technique of second harmonic generation is used as a probe to the surface of porous silicon superlattice by using Nd:YAG laser. We have investigated the surface structure and nonlinear-optics properties of porous silicon superlattice. 전류밀도와 에칭시간을 변화시키면서 제작된 다공질 규소 초격자의 표면에서 Nd:YAG 레이저의 제2 고조파를 발생시켰다. 이로부터 대칭구조가 바뀌고 유전율이 상승됨이 관측되었다.