효소반응 동력학 정수에 대한 유전상수의 영향

지영민 高麗大學校 自然資源科學硏究所 1998 自然資源科學硏究 Vol.6 No.-

비수계 용매에서의 효소반응

지영민 高麗大學校 自然資源科學硏究所 1995 自然資源科學硏究 Vol.3 No.-

Mo¨ssbauer분광법에 의한 Ca_(0.75)Ba_(0.25)Fe_2O_4의 Fe이온에 대한 연구

홍치유,윤인섭,조수열,김영민,황진철 東國大學校 1992 東國論叢 Vol.31 No.-

The Mo^ssbauer spectrum of CaFe_2O_4, consists of paramagnetic two doublets absorption peaks at room temperature. But, the replacement of Ca^+2 ions in CaFe_2O_4 with Ba^+2 ions changes the magnetic properties without changing the crystal structure and the Mo^ssbauer spectrum of Ca_0.75Ba_0.25Fe_2O_4 consists of paramagnetic two doublets and ferrimanetic three different Zeeman sextets absorption peaks due to the Fe^57 nuclei in the various sublattices. According to this study, the Fe ions in the Ca_0.75Ba_0.25Fe_2O_4 are trivalent in al sublattices and there are more than three sublattices in this structure.

부신 결핵에 의한 Addison씨병 1예

송치운,구본정,안봉수,전준식,안미애,이진홍,송민호,김영건,노흥규 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.2

Addison's disease is a rare primary adrenal insufficient disorder resulting from chronic deficiency of adrenal cortical hormones. Clinical manefestations are generalized weakenss, weight loss, hyperpigmentation (especially sun exposed area and mucous membrane), hypotension, hyponatremia, hyperkalemia, gastrointestinal symptoms (involving anorexia, nausea, vomiting, abdominal pain). A 34-year-old woman has experienced slowly progressive generalized weakenss and skin pigmentation, anorexia, nausea, vomiting with ascites and diffuse abdominal pain. On the time of admission, her main clinical manifestations were anorexia, nausea, vomiting, fatigue, generalized weakness, amenorrhea, hair loss, diffuse abdominal pain revealed as Addison's disease due to bilateral adrenal tuberculosis. Her adrenal insufficient symptoms were recovered with the replacement of adrenocortical hormones and antituberculous medications. After treatment, Her skin pigmentation was decreased and menstruation was reappeared. Here we experienced one cases of Addison's disease with tuberculous peritonitis.

산채류로부터 혈소판응집 억제물질의 검색

윤민호,임치환,오진환,이종철,최우영 충남대학교 농업과학연구소 1997 농업과학연구 Vol.24 No.2

To select potential inhibitors of platelet aggregation form large numbers of crude plant extracts, the modified thin smear method for the anti-platelet aggregating activity using platelet rich plasma was further modified by direct observation under a light microscope without staining the smear. The activities determined by the method were coincided with those by the electrical impedence method using whole blood, when ADP or collagen was employed as the aggregating agent. Among 130 varieties of edible and herbal plants which collected from markets or experimental farms of agricultural research institutes, those showed the anti-platelet aggregating activities were selected by testing the crude methanol extracts: Aster scaber, Aster tataricus, Ligularia stenocephala, Platycodon glaucum Allium victorials, Allium oderum, Morus bombycis, Portulaca oleracea, Acanthopanax sessiliflorus and Rosa davurica. However, some of them activated the platelet aggregation under the same assay conditions: Pimpinella brachycarpa, Hosta plantaginea. Capsella bursapastoris, Fagopym esculentum, Prunus mume, Rubus coreanus and Limaria japonica. In addition, those revealed the antioxidant activities were selected by measuring the abilities to scavenge superoxide anion radicals: Pteridum aquilinum, Aster scaber, Ligularia fischeri, Chrysanthemum zawadskii, Artemisia capipparis, Cirsium setidens, Commelina communis and Capsella bursapastoris among edible plants.

당뇨병에 합병한 고지혈증에 대한 Acipimox(Olbetam)의 효과

김영건,김진희,전준식,송치운,송민호 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Multiple abnormalities of lipoprotein metabolism exist in patients with diabetes mellitus that could contribute to their enhanced susceptibility to atherosclerosis. Acipimox(5-methyl-pyrazine carboxylic acid 4-oxide, Farmitala Carlo Erba, Milano Italy) is a new potent and long acting(8h) antilipolytic agent, which has been derived from nicotinic acid. By lowering plasma and possibly skeletal muscle concentrations of non-esterified fatty acid, Acipimox may have a potential beneficial effect on glucose metabolism in patients with non-insulin dependent diabetes mellitus. The aim of this study was to evaluate the acute effect of Acipimox on hyperlipidemia associated with non-insulin dependent diabetes mellitus. 18 patients with non-insulin dependent diabetes mellitus were in the study. They had fasting plasma triglyceride concentrations above 250 mg/dl and cholesterol concentrations above 240 mg/dl. The level of triglyceride, cholesterol and glycated hemoglobin were significantly reduced after 8 weeks treatment of Acipimox. Adverse effects were noted in 3 patients, but it was transient with the course of administration. Acipimox is an effective and safe drug for the management of hyperlipidemia associated with non-insulin dependent diabetes mellitus.

pKT230 벡터를 이용한 Pseudomonas sp. P20 2,3-Dihydroxybiphenyl Dixygenase 유전자의 클로닝

김지영,김치경,가종억,민경희,박용근 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.6

Biphenyl과 4-chlorobiphenyl을 분해하는 자연계 분리 균주인 Pseudomonas sp. P20의 chromosomal DNA로부터 pBluescript SK(+)를 이용하여 pcbABCD 유전자를 클로닝하여 재조합플라스미드 pCK1을 제조하였고, 또 pcbCD 유전자를 포함하여 pCK102을 제조하였다. 방향족 탄화수소 화합물의 생분해는 벤젠고리의 개환 과정이 중요하기 때문에, 2,3-dihydroxybiphenyl(2,3-DHBP)의 벤젠고리의 개환에 관여하는 2,3-DHBP dioxygenase(2,3-DHBD) 유전자를 pKT230 벡터를 이용하여 pCK102로부터 클로닝하였다. EcoRI으로 절단한 pCK102와 pKT230 벡터를 ligation시켜 13.8 kb의 hybrid plasmid pKK1을 제조하였다. 2,3-DHBD 유전자를 포함하는 pKK1을 E. coli XL1-Blue에 형질전환시켜 E. coli KK1 재조합 균주를 얻은 후, 2,3-DHBD의 활성을 측정하였다. E. coli KK1의 2,3-DHBD의 효소활성은 pBluescript SK(+)를 이용하여 제조한 재조합 균주인 E. coli CK102의 효소활성과 유사하였으나, Pseudomonas sp. DJ-12와 Pseudomonas sp. P20과 같은 자연계 분리균주보다 훨씬 높았다. Pseudomonas sp. P20 isolated from the polluted environment is capable of degrading biphenyl and 4-chlorobiphenyl. The pcbABCD genes responsible for degradation of biphenyl and 4-chlorobiphenyl were cloned using pBluescript SK(+) from the chromosomal DNA of Pseudomonas sp. P20 to construct pCK1 and pCK102, harbouring pcbABCD and pcbCD, respectively. The 2,3-DHBP dioxygenase gene, pcbC, was cloned again from pCK102 by using pKT230 which is known as a shuttle vector and pKK1 hybrid plasmid was constructed. The E. coli KK1 transformant obtained by transforming the pKK1 into E. coli XL1-Blue showed 2,3-DHBP dioxygenase activity. The specific 2,3-DHBP dioxygenase activity of E. coli KK1 was similar to that of the E. coli CK102, but much higher than those of the natural isolates, Pseudomonas sp. DJ-12 and Pseudomonas sp. P20

혈액투석중인 만성신부전 환자에서 골대사 지표로써의 Osteocalcin치

송치운,이진홍,안미애,윤환중,윤상임,성기양,이강현,송민호,이강욱,신영태,김영건,노흥규 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Background : Serum osteocalcin is synthesized by osteoblast and has been shown to be sensitive indicator of bone turnover inpatients with various metabolic bone disease. In renal osteodystrophy, serum osteocalcin is elevated due to decreased renal clearance and elevated level of PTH. This study was done to evaluate the usefulness of serum osteocalcin as a marker of bone metabolism and the correlation with other biochemical markers of bone metabolism. Methods : We measured serum osteocalcin, calcium, phosphorus, ALP(alkaline phosphatase) and PTH(parathyroid hormone) in 37 patients with end stage renal disease on hemodialysis. Osteocalcin was determined by radioimmunoassay and PTH was determined by radioimmunometric assay. Results : 1) The mean level of serum osteocalcin in ESRD patients was 233.8± 218.2ng/ml which was significantly higher than that of controls(p<0.0001). 2) The mean level of serum PTH in ESRD patients was 40.5± 43.8pg/ml was significantly higher than that of controls(p<0.005). 3) There was a significant positive correlation between the level of serum PTH, ALP and the level of serum osteocalcin in ESRD patients. 4) By using multiple regression, PTH is most reliable factor that affect to elevated level of serum osteocalcin ( beta coefficient = 0.687, Sig T<0.05). Conclusion : Serum osteocalcin as a marker of bone metabolism in ESRD patients is more useful than other biochemical marker such as serum calcium, phosphorus, ALP and PTH is a most reliable factor that affect to elevated level of serum osteocalin.

In situ 고상 에피택시 방법에 의한 CoSi₂/Si(111)구조의 형성

이정주,강민성,김현수,최치규,이운환,이종덕,이영백,김건호,이정용 濟州大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.9 No.2

초고진공에서 공상에피택시(solid-phase epiyaxy, SPE) 방법으로 CoSi₂를 Si(111)기판 위에 에피택시 성장시켰다. 2MeV⁴He++ ion후방산란 분광기와 사중결정 x-선 회절기 및 고분해 투과전자 현미경을 이용하여 성장된 CoSi₂의 상과 조성, 결정성, 그리고 계면의 미시구조를 조사하였다. 초고진공상태의 실온에서 Si(111)-7X7기판에 Co를 약 20 ~50 ?? 중착한 후 SPE에 의하여 실리사이드를 형성시키는 경우 600℃에서는 B-형의 CoSi₂가, 그리고 700℃에서는 A형의 CoSi₂가 선택적으로 에피택시 성장하였으며, 정합성은 B-CoSi₂[110]//Si[110] and CoSi₂(111)//Si(111)이, 그리고 700℃에서는 A-CoSi₂[110]//Si[110], CoSi₂(002)//Si(002)을 나타내었다. Epitaxial films of CoSi₂were grown on Si(111) substrates by in situ solid-phase epitaxy in a ultrahigh vacuum. The phase, the chemical composition, the crystallinity, and the microstructure of the Silicide/Si interface were investigated by 2-MeV⁴He++ ion-backscattering spectrometry, quadruple crystal X-ray diffractometry, and high-resolution transmission eletron micorscopy. High-quality films of either B-type or A-type CoSi₂ could be grown selectively on Si(111) substrates by depositing ~ 20 ~ 50 ?? of Co on a Si(111)-7X7 substrate followed by in situ annealing at 600℃ or 700℃ for 10 min. The matching face relationships are CoSi₂[110]//Si[110] and CoSi₂(111)//Si(111) by B-type CoSi₂ and CoSi₂[110]//Si[110]//Si[110] and CoSi₂(002)//Si(002) for A-type CoSi₂.

관상동맥내 스텐트 삽입후 발생한 관상동맥류 2례

제인수,허민영,문치숙,이재호,정수룡,조길현,이영민,김대경,김두일,김동수 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.3

Coronary artery aneurysms are detected with increasing frequency because of the routine use of coronary angiography in the diagnosis and management of coronary artery disease. Although some coronary artery aneurysms are congenital or inflammatory, most are atherosclerotic. The prognosis of atherosclerotic coronary artery aneurysm may depend on the morphology of the aneurysm or the presence of coexisting obstructive disease. Coronary artery aneurysms have been also reported to occur after ballon angioplasty, directional athrectomy, laser angioplasty, and stent implantation with a frequency of 2% to 4%. The long-term outcome of post-intervention coronary artery aneurysm is unknown. We report two cases of the development of a coronary aneurysm 6 months after stent implantation as a treatment of severe obsructive coronary artery disease.