http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
출생후 발생에 따른 흰쥐 전뇌 기저부 Meynert 긴저칙에서의 신경성장인자 수용체에 대한 면역세포화학적 연구
정영화,홍영호,신보철,Jeong, Yeong-Hwa,Hong, Yeong-Ho,Sin, Bo-Cheol 한국통합생물학회 1993 동물학회지 Vol.36 No.4
출생후 발생에 따른 흰쥐 전뇌 기저부의 Mevnert 기저핵(nucleus basalis of Mevnert)에서 신경성장인자 수용체(nerve growth factor receptor, NGFr)를 함유하는 신경세포의 면역반응성 및 분포, 세포형의 분류, 각 형별 출현율 및 세포 크기 그리고 세포소기관과 NGFr 면역반응과의 관계를 조사하였다. NGFr 면역반응 신경세포들은 출생후 초기 발생에서 세포질 뿐만 아니라 원형질 막에서도 면역반응을 보였으나, 성체에서는 세포질에서만이 면역반응을 보였다. NGFr 면역반응 신경세포는 형태학적 특징인 세포체의 모양과 장·단축의 비를 기준으로 5가지 형, 즉 1) 원형, 2) 난형, 3) 세장형. 4) 방추형, 5) 삼각형(또는 다각형)세포로 구분되었다 원형과 난형 세포는 출생후 0일에서 각각 15.4%. 50.7%의 높은 출현율을 보였으나, 발생이 진행되면서 점차 감소하여 성체에서 각각 7.8%, 28.6%의 출현율을 보였다 반면, 세장형, 방추형 및 삼각형세포는 출생후 0일에서 각각 22%, 2.6% 9.2%의 낮은 출현율을 보였으나, 발생이 진행되면서 지속적으로 증가하여 성체에서는 각각 29 9%, 5.2%, 28.5%의 높은 출현율을 보였다. 출생후 0일에서 신경세포체의 부피는 매우 작았으나(1,642mm3), 발생에 따라 점차 증가하여 14일, 21일에서는 성체에서보다 매우 컸다(각각 6.745, 6,755mm3) 원형 및 난형세포체의 부피는 21일에서(각각 7 955. 7.020mm3), 세장형 방추형 그리고 삼각형세포체의 부피는 14일에서 제일 컸다(각각 7,067, 6,237, 7,748 mm3) 대체적으로 삼각형세포체의 부피가 제일 컸으며, 방추형세포체의 부피가 제일 작았다. 출생후 순일에서의 전자현미경적 관찰에서 세포소기관중 조면소포체, Golgi체, multivesicular body 그리고 세포표면 원형질막이 강한 NGFr 면역반응을 보였다. 위의 결과들로 미루어 MGFr은 출생후 흰쥐 전뇌 기저부 Meynert 기저핵 신경세포의 분화 및 분포와 밀접한 관계를 갖는 것으로 생각된다.
Yeong Hwa Jeong(鄭榮和),Gyo Sung Shim(沈敎誠) 강원대학교 산업기술연구소 1991 産業技術硏究 Vol.11 No.-
The fatigue tension tests were performed by use of the specimens without and with a hole, 1/4 crack and 1/2 crack, made of SS41 and S45C steel round bars. Followings were these results. It was shown that in the base metal and the specimen with a hole the fatigue strength of the high strength steel bars was lower than that of the low strength steel bars under the low stress range. It was shown that the fatigue strength of the specimen with a hole was nearly same as that of the base metal, but the fatigue strength of the specimens with the crack was much lower than that of the base metal. It was shown that the fatigue strength of the specimens with the crack was much lower than that of the other specimens under the high stress range.
C형 만성 간염 환자에서 알파 인터페론 투여 전후 혈청내 C형 간염 바이러스 RNA의 변화
정영화 ( Jeong Yeong Hwa ),민영일 ( Min Yeong Il ),서동진 ( Seo Dong Jin ) 대한내과학회 1993 대한내과학회지 Vol.44 No.6
Background : At present the administration of interferon is the most effective treatment of chronic hepatitis C. The purposes of this study are to evaluate the effects of alpha-interferon therapy on hepatitis C viral RNA(HCV-RNA) and to clarify the correlations among biochemical, histological and antiviral responses. Methods : The presence of serum HCV-RNA as well as serum alanine aminotransferase(ALT) activities and histological changes were monitored in 30 patients with biopsy-proven chronic hepatitis C; 15 were treated with interferon alpha 2b for 6 months and the other 15 were selected as controls. Results : The serum ALT levels became normal in 13 among 15 patients (87%) during interferon treatment while none of 15 patients in control group showed normal value during follow-up period of 12 months. Although serum ALT level remained normal in 3, it rose again in 10 of 13 responders to pretreatment level shortly after cessation of interferon therapy. Histological activity index (HAI) improved by more than 2 points in 5 among 11 interferon-treated patients including 3 patients who showed persistently normal ALT level and negative serum HCV-RNA for more than 6 months after interferon therapy. Serum HCV-RNA detected by reverse transcription-polymerase chain reaction (RT-PCR) technique became negative in 10 among 15 patients (67%) usually one to two months after beginning of IFN therapy. HCV-RNA was persistently detected in 15 control patients during the follow-up period. 3 patients with persistently normal ALT remained HCV-RNA negative for more than 6 months after interferon treatment. But in 7 patients, the ALT levels remained normal while HCV-RNA was negative but those rose to pre-treatment levels after reappearance of HCV-RNA. Conclusions : These results suggest that the negative conversion of serum HCV-RNA is closely associated with the normalization of serum ALT level and histological improvement, and that long-term response might be predicted when HCV-RNA remain negative for more than 6 months after initiation of interferon therapy.
대한간학회지 제6차 춘계학술대회 초록집 : 구연 ; 소간세포암의 진단에 혈장 Transforming Growth Factor β1 (TGF-β1)의 종양 표지자로서 유용성
송병철 ( Song Byeong Cheol ),정영화 ( Jeong Yeong Hwa ),김정아 ( Kim Jeong A ),정석원 ( Jeong Seog Won ),장우영 ( Jang U Yeong ),이상수 ( Lee Sang Su ),박현주 ( Park Hyeon Ju ),이한주 ( Lee Han Ju ),이영상 ( Lee Yeong Sang ),서동 대한간학회 2000 Clinical and Molecular Hepatology(대한간학회지) Vol.6 No.1(S)
티타늄 기판 위에 강유전성 BaTiO<sub>3</sub>박막 형성과 분극처리에 의한 Eagle’s MEM 용액에서의 Calcium Phosphate 생성
이용렬,정영화,황규석,송호준,박영준,Lee, Yong-Ryeol,Jeong, Young-Hwa,Hwang, Kyu-Seog,Song, Ho-Jun,Park, Yeong-Joon 한국재료학회 2002 한국재료학회지 Vol.12 No.7
Titanium (Ti) is a bioinert material and has lower elastic coefficient and better strength/volume property than other metals. Ferroelectric materials show alignment of positive and negative charges by poling treatment. This study was purposed to develop a new implant system by combining the advantages of Ti and ferroelectric property of $BaTiO_3$ (BTO). It was performed with the assumption that the $Ca^{2+ }$ ions would be easily attracted on negatively charged surface and the attracted cation might behave as nuclei for bone-like crystal growth in biological solutions. A ferroelectric BTO thin film on Ti was fabricated and the effect of poling treatment on the improvement of calcium phosphate (Ca-P) formation in biological solutions was evaluated. After immersion in Eagle’s minimum essential media (MEM) solution, NaCl was formed on Ti, and Ca-P layer containing NaCl was formed on Ti-O. Weak and sparse Ca-P layers were formed on BTO, while thick, homogeneous, and dense Ca-P layer was formed on negatively polarized BTO (N-BTO), which was confirmed by FE-SEM and EDX. In summary, these results demonstrate that poling the ferroelectric BTO surface negatively is effective for the formation of Ca-P layer in MEM solution, and that N-BTO coating on Ti could be used as a possible alternative method for enhancing the osseointegration of the implants.