편측 저작습관이 저작운동에 미치는 영향에 관한 연구

현태연,한경수 대한 두개하악 장애학회 1997 대한두개하악장애학회지 Vol.9 No.2

This study was performed to investigate the chewing movements in subjects with unilateral chewing habit. 42 patients with temporomandibular disorders and 44 dental students without any signs and symptoms of the temporomandibular disorders were selected as the patients group and the control group, respectively. BioEGN of the Biopak (BioResearch Inc. USA) was used to record chewing movements pattern as to chewing velocity, range of movements and symmetry of the path to midline. The data were analyzed by the preferred chewing side and/or the affected side by SAS/stat program. The results obtained were as follows : 1. In control group, right side chewing subjects showed more deflected path to preferred chewing side than left side chewing subjects have done. But in patients group, there was no significant difference in chewing pattern between the two subjects. 2. In unilaterally affected patients, right side affected patients showed slight difference between the movements to both sides, but left side affected patients showed significant deflection to the affected side. 3. There were some difference in preferred chewing side movement pattern between the patients group and the control group in right chewing subjects whereas no difference was seen between the two groups in left chewing subjects. 4. There was no difference in chewing velocity and range of movements between right and left side movement in all cases compared by preferred chewing side or affected side.

IgG GM₁ 항체와 Campylobacter jejuni 항체와 관련된 급성 운동축삭형 신경병증

홍경훈,김승현,이영배,이영주,김희태,김주한,김명호 대한신경과학회 1997 대한신경과학회지 Vol.15 No.5

고체윤활제용 MoS₂박막의 스퍼터조건에 따른 미세구조에 관한 연구

현창용,이태근,이경준 서울産業大學校 1994 논문집 Vol.40 No.1

The nucleation and microstructure of DC & RF sputtered MoS₂thin film on glass, Si wafer, stainless steel, and Al foil have been studied. The grain size was increased with the substrate temperature(R.T.∼300℃)and working pressure(3∼20mtorr). Cracks were initiated at the surface and propagated to interior of MoS₂thin film due to compressive stress above critical thickness(about 2,000nm). (100) was dominated at R.T. and (002) was observed at 150℃ and 300℃ implicating that the predetermined grain growth was perpendical to the substrate. The coarse grain and worm-like grain growth was observed by SEM from R.T. to 300℃ at 10mtorr.

MTT비색법에 의한 결핵균 30-kDa항원이 임파구 증식에 미치는 영향

백태현,김민경,박정규,김화중,조은경,최대경 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

The cell mediated immune response appears to result from the specific recognition of an antigen. by T lymphocytes. It has been well recognized that T cell play an important roles in the induction of tuberculin hypersensitivity and immunity to tuberculosis. In order to evaluate effect on T lymphocyte proliferative response to purified 30-kDa antigen from Mycobacterium tuberculosis, stimulation effects of peripheral blood lymphocytes with 30-kDa antigen, crude antigen and PHA were measured by MTT colorimetric assay. Three groups of healthy subjects, representing PPD(+), PPD() and PPD(-) persons, were investigated. The proliferative response to 30-kDa antigen were elicited the plateau at concentration of 20 to 0.1㎍/ml, crude antigen showed rapid reduction as decreasing the concentration of antigen, for the PPD(+) person. Both antigens, at concentration of <1㎍/ml, failed to stimulate lymphocytes of the PPD(-) person. Therefore the concentration of 30-kDa antigen to induce optimal stimulation was 1㎍/ml. The lymphocyte proliferation to 30-kDa antigen and crude antigen were significantly increased in PPD(+) group when compared to those in PPD(-) group, but PHA response was no significant difference. These results suggest that 30-kDa antigen could stimulate lymphocyte from PPD(+) population and MTT colorimetric assay could be applied to assess proliferative response of lymphocyte.

임상실습에 임하는 학생들의 비강 및 피부에 분포된 포도구균과 환자병소에서 분리된 포도구균에 대한 병원성의 연관성에 관한 연구

최대경,김홍선,백태현,권지순 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.2

The authors have studied the pathogenecity of staphylococci isolated from 96 patients in Chungnam National University Hospital and Staphylococci isolated from nose and axilla of 50 medical and 50 nursing students in Chungnam National University. The authors conducted the survey from January 1986 to June 1986. The results obtained were as follows : 1. Out of staphylococci isolated from 96 patients, Staphylococcus aureus and Staphylococcus epidermidis were 59.4%, and 32.3%, respectively. In staphylococci isolated from nose of medical and nursing students, Staphylococcus aureus was 13.6^(male), 17.2%(female) and Staphylococcus epidermidis was 61.0%(male), 75.9%(female), respectively. 2. In the biotype of Staphylococcus epidermidis isolated from patients, the rate of biotype 1 was 93.5%. In the staphylococcus epidermidis isolated from nose of medical and nursing students, the rate of biotype 1 was 55.6%(male), 31.8%(female). In the axilla, the rate of biotype 1 was 56.5%(male), 52.6%(female), respectively. 3. In the biotype 1 of Staphylococcus epidermidis isolated from patients and control groups, enzymatic activities were more active than other biotypes. 4. Crystal violet ring test of Staphylococcus epidermidis isolated from patients, biotype 1 was WR type 22.6%, SR type 67.7% and DR type 3.2%. 5. To the antibiotic activities of staphylococci isolated from patients, Staphylococcus aureus was resistant to gentamycin(96.5%), penicillin(78.9%), lincomycin(47.4%) and erythromycine(35.1%). In the nose of medical students, Staphylococcus aureus was resistant to penicillin(11.9%), gentamycin(11.9%), lincomycin(6.8%) and tetracycline(5.1%). 6. In the multiple antibiotic resistance of staphylococci isolated from patients, Staphylococcus aureus was resistant to 2 antibiotics(35.1%), 3 antibiotics(17.5%), 5 antibiotics(15.8%) and, Staphylococcus epidermidis was resistant to 3 antibiotics(32.3%), 4 antibiotics(19.4%) and 5 antibiotics(16.1%).

W(110) 표면에 CO의 흡착

이경희,유위량,한현석,부진효,이순보,곽현태 성균관대학교 기초과학연구소 1998 論文集 Vol.49 No.-

The interaction of CO with W(110) surface was investigated through LEED, TDS, and photoelectron spectroscopy using synchrotron radiation under UHV condition. After CO saturation at RT, two desorption states, called α and β , were observed at about 400 and 1150 K in thermal desorption spectra, respectively. The kinetics of 3-CO followed the first order kinetics, indicating the existence of molecular CO on W(110) surface. This is contrary to the previous results. The O 1s BE(binding energy) of CO adsorbed on W(110) surface at room temperature was 529.9 eV. On the other hand, the O 1s BE of β-CO after heating to 900 K was different from that of oxygen adsorbed W(110) surface, suggesting a different adsorption state. According to the UP valence band spectra, we observed two peaks at near -10.7 eV (4σ) and -7.0 eV (5σ+1π), indicating the molecular adsorption of CO at room temperature. Furthermore we could see the 4σ peak at the various photon energy and elevated temperatures. Comparing the energy separation, Δ(4σ-1π) , between 4σ and 1π UP peaks of chemisorbed CO, we found that an increased separation reflects an decreased C-O bond strength. Therefore on the basis of TDS and photoelectron spectroscopy, we could suggest that β state of CO on W(110) may not be dissociated and has an adsorption geometry of lying-down mode.

소아에서 나타난 비구개관낭의 치험례

모정희,정현구,조태식,김효석,박성규,이난영 조선대학교 구강생물학연구소 2002 口腔生物學硏究 Vol.26 No.2

The nasopalatine duct cyst is the most common non-odontogenic cyst in the oral area and is thought to be originated from the epithelial remnants of the nasopalatine duct. The nasopalatine duct cyst have been mentioned to be an overall incidence of 1.7-11.9% of all jaw cyst. More males than females are affected by that. It could occur all around the age, and especially in their 40th and 60th it happens the most and in childhood it is very rare. Proper treatment for nasopalatine duct cyst is enucleation. In the case of very large cysts, it is likely to be a risk of naso-oral or antral-oral fistulas or of devitalization of teeth, marsupialization is indicated. The purpose of case report is that a nasopalatine duct cyst in is very rare in childhood. A 9-year-old boy was referred to the chosun university pedodontics clinic that this child who has anterior palatal swelling is in routine check. The size of the cyst was so big that the marsupialization was committed and obturator was put. This patient is on the continuous observation. we treated the nasopalatine duct cyst with obturator.

급성 심근경색 : Gd-DTPA 조영증강 자기공명영상 Gd-DTPA Enhanced Magnetic Resonance Imaging

정경일,김제현,이창호,이영주,김한수,소동문,이영돈,박경주,왕희정,탁승제,이철주,김선용,김옥화,임태환,문창현,최병일,서정호 아주대학교 의과학연구소 1996 아주의학 Vol.1 No.1

This study was undertaken to determine the value of gadolinium dimeglumine (Gd-DTPA) enhanced MRI in the diagnosis of acute myocardial infarction. Seven cats were subjected to 2 hours of left anterior descending coronary arteryocclusion (group 1) and 8 cats to 1 hour of occlusion (group 2). Reperfusion was followed by taking Tl-weighted MR images at 5, 15, 30, 45, 60 minutes after Gd-DTPA (0.2 mmol/kg) injection. Myocardial enhancement patterns were categorized into three zones (central ischemic, peripheral ischemic, and normal) or two zones (ischemic and normal) and the presence of injured myocardium in each zone was confirmed by 2,3,5-triphenyltetrazolium chloride (TTC) staining. Signal intensity (SI) of each zone was evaluated relative to back muscle in regard to its chronological changes and difference among the zones. Group 1 displayed three zones of enhancement in 6 cats whereas 1 cat in group 1 and all in group 2 showed two zones of enhancement. Intermediate SI central zone was compatible but smaller than TTC nonstained area, and determined to be a persistently occlusive injury. High SI peripheral zone in group 1 and high SI ischemic zone in group 2 were stained and determined as reperfused injury although reversibility was not definite. The peak SI, occurring 15 minutes after Gd-DTPA injection, of 2.47±0.48 at peripheral zone was greater than that of 1.66±0.36 at central zone in group 1 and of 1.81±0.41 at ischemic zone in group 2 (p < 0.05). SI of injured myocardium increased more rapidly and decreased more gradually than that of normal myocardium. That the features of SI change with time in injured myocardium was compatible with the results of other studies using different contrast agents. Gd-DTPA enhanced MRI differentiated persistently occlusive injury as central intermediate SI, and reperfused injury as homogenous high SI, with the maximal contrast between the two at 15 minutes after contrast injection, thus indicating the value of Gd-DTPA enhanced MRI in the diagnosis of acute myocardial infarction.

모드 선택성을 강화한 비접촉식 유도초음파 기술

김현묵,이태훈,장경영 한국비파괴검사학회 2004 한국비파괴검사학회지 Vol.24 No.6

유도초음파의 현장적용에 있어 전파모드를 규명하는 것은 매우 어렵지만 중요한 과제이다. 본 연구에서 분산성이 적은 단일모드를 발생시키고 검출할 수 있는 기법에 대해 다루고 있으며, 현장 적용성과 자동화를 위해 비접촉식의 기법을 적용하였다. 모드 선택성을 강화한 비접촉식의 유도초음파 기법으로는 선배열 슬릿을 이용한 레이저 빔을 이용하였으며, 에어커플 변환기를 수신자로 사용하였다. 선배열의 레이저 조명은 파장과 일치하여 특정한 모드를 발생시킬 수 있다. 1 mm 두께의 알루미늄 판에 본 기법을 적용한 실험결과로부터 제안하는 기법의 유용성을 검증하였고, 특히 단일한 a_(0)모드의 발생 및 수신에 효과적인 기법으로 나타났다. In practical applications of guided wave techniques, it is very important but also difficult to identify the propagating modes, and it is preferred to generate and detect a single or less dispersive mode. Also the noncontact method is required in the automated field application. So this paper considers a non-contact guided wave technique with enhanced mode-selectivity, where a laser beam illuminated through arrayed line slits is used as the transmitter and the air-coupled transducer is used as the receiver. The line arrayed laser illumination is a wavelength matching technique that can generate only a few modes. The air-coupled transducer detects the leaky wave of the propagated guided wave, and by tuning its detection angle we can detect the selected single mode. Experimental results for a 1 mm thick aluminum plate proved the usefulness of the proposed method, and especially it was shown that this method was powerful in the generation and detection of the a_(0) mode.

부신피질 자극호르몬 단독결핍 1례

박경식,이승현,최석영,박태규,이동화,이찬우,정성복,이인규 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.3

부신피질 자극호르몬 단독결핍은 국내에서 7례만이 보고된 희귀 질환이며 병인 및 경과 등 아직 불분명한 측면이 많다. 이는 질환지체의 희귀성도 있지만 치료후 자연경과에 대한 장기적인 추적검사가 이루어진 경우가 드물기 때문이기도 하다. 저자들은 비특이적인 전신증상을 주소로 내원한 폐경기후의 56세 여자 환자에서 자가면역질환의 증거없이 고프로릭틴혈증을 보인 부신피질 자극호르몬 단독결핍 1례를 경험하고 1년간의 부신피질호르몬 대치요법후 추적검사를 실시하였기에 문헌 고찰과 함께 보고하는 바이다. Isolated ACTH deficiency is a rare disorder which shows secondary adrenal insufficiency with normal states of other pituitary hormones. A 56-year-old postmenopausal woman complaining general weakness and intermittent mental confusion presented negligible serum cortisol and ACTH level with hyperprolactinemia and mild hyponatremia. Rapid ACTH stimulation test did not show significant increase of serum cortisol level. Combined pituitary stimulation test showed negligible response of cortisol and ACTH, and slightly decreased response of prolactin and gonadotropin. But the responses of TSH and GH were normal. There was no evidence of organic pituitary of hypothalamic lesion in brain MRI and antithyroid autoantibody was not detected in serum. After receiving 12 months of glucocorticoid replacement therapy, she skipped the medicine for 3 weeks and we performed follow-up endocrinologic tests. Serum ACTH and cortisol level was also negligible and prolonged ACTH simulation test showed normal response of serum cortisol. CRF stimulation test showed no response of serum ACTH. Basal prolactin level was decreased to near normal and combined pituitary stimulation test showed normal response of prolactin with slightly blunted response of TSH and GH. We concluded that the case was nonautoimmune origined isolated ACTH deficiency which was accompanied by hyperprolactinemia and resultant deficiency of gonadotropin, so we report this case with review of literatures.