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.

실내 기후동에서 개인형 국소냉방 장치의 기류 및 온도 분포해석

엄태인,장은숙,경남호,신기식,문승현,전영남,류창국 한밭대학교 생산기반기술연구소 2002 생산기반기술연구소 논문집 Vol.2 No.1

Numerical simulation is performed by the commercial code FLUENT for individual air condition system to calculate the velocity and temperature profiles around worker in climate room. The main calculation region is the space of ㄱ shape between wall and worker in the individual air condition system. The fresh air is emitted from 3 inlet attached on the right, left and center wall. Because the comfort of worker is closely related with the velocity and temperature of wind, these data are key role for design of the individual air condition system. This work is previous study for evaluation of thermal comfort of workers in room without much experiments according to metabolism and heat emission of human body. Numerical simulation results are as followings, 1. There is an possibility of the thermal comfort of worker is gotten worse due to the presence of dramatic change of wind velocity around worker. 2. Temperature gap exists in worker's body between top and bottom according to fresh air inlet velocity and position which is right, left and center of wall. 3. Calculation results of the skin temperature of worker are key data for evaluation of thermal comfort with experimental data in climate room. 4. Optimum condition of temperature, direction and velocity of fresh air will be obtain by numerical simulation for energy effective individual air condition system.

결핵균체 단백항원에 대한 항결핵균 IgG 항체에 관한 연구

최대경,백태현,권지순,심운택,이동배 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2

In order to study the level of IgG antibody binding to sonicate antigen of Mycobacteriumn tuberculosis H_34Rv for ammonium sulfate 30∼40 fraction in sera isolated from 209 patients and. 135 controls were measured by plastic tube enzyme-linked immunosorbent assay (ELISA). The levels of IgG antibody binding to Mycobacterium tuberculosis H_37Rv antigen in sera from all patients and controls were measured after absorption of 1 : 400 diluted sera with ,Wycobacteriuez bovis and dMlycobacterium Kansasii for ammonium sulfate 30∼40 fraction. The authors conducted the survey from August 1984 to January 1985. The results obtained were as follows : 1. At the serum dilution of 1:400, the mean ELISA values of IgG antibody to Mycobacterium tuberculosis H_37Rv after absorption with Mycobacterium kansasii antigen from far advanced patients and control were 0.8666±0.4903 and 0.2058±0.1353, respectively. 2. The mean ELISA value of IgG antibody to Mycobacterium tuberculosis H_37Rv afer absorption with Mycobacterium kansasii antigen from moderate patients was 0.6488±0.3918, the ratio of ammonium sulfate fraction 30∼40 in sera from patients and controls was 3.153. 3. The mean ELISA value of IgG antibody to Mycobacterium tuberculosis H_37Rv after absorption with Mycobacterium kansasii antigen from minimal patients was 0.4205±0.3155, the ratio of ammonium sulfate fraction 30∼40 in sera from patients and controls was 2.043.

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.

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.

데치는 시간에 따른 침투성 및 비침투성 농약 처리 엽채류의 비타민 및 무기질의 함량 변화

전혜경,안태현,홍정진 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.1

The present study was conducted to investigate effect of blanching time on changes in vitamin and mineral contents in leafy vegetables treated by different pesticides. Vitamin A content of fresh leafy vegetables was high whorled mallow > chard > spinach hi order and vitamin C content of those was high spinach > whorled mallow > chard in order. Vitamin A and C contents of leafy vegetables treated by non-systemic pesticide were higher than those of leafy vegetables treated by systemic pesticide. Changes in vitamin A and C contents of leafy vegetables treated by systemic pesticide and non-systemic pesticide showed a similar trend. Vitamin A content significantly increased, while vitamin C content significantly decreased by conventional blanching. Changes in mineral contents in leafy vegetables treated by systemic pesticide and non-systemic pesticide showed a similar tread. Upon conventional blanching, Mg in spinach, Mg and Ca in chard and whorled mallow slightly increased, while K in all leafy vegetables remarkably decreased, and Se in spinach slightly decreased and Se in other vegetables remarkably decreased. On the other hand, Na, P, Fe, Cu and Zn in all leafy vegetables slightly decreased or did not show any change.

Penicillin이 포도구균 세포벽 형성에 미치는 전자현미경적 연구

황준경,최대경,박정규,백태현 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.2

Electron microscopy of morphological changes in Staphylococcus aureus induced by penicillin and vancomycin which interfere with cell was synthesis revealed morphological alterations which correlated well with their mechanism of action. And the studies also were undertaken to investigate alterations in surface morphology resulting from the action of gentamycin known to interfere with intracellular protein synthesis. Cultures of Staphylococcus aureus were exposed to penicillin G(1/2 MIC), vancomycin(1/2 MIC) and gentamycin(1/2 MIC) for 5 hours at 37℃. The following results were obtained; 1. Subinhibitory concentration of penicillin G(1/2 MIC) do not kill Staphylococcus aureus, they were induced the cell surface depression, large and small cell formation. 2. In the exposure to 1/2 the MIC of penicillin G, the cross wall was much wider than in the control, 1/2 the MIC of penicillin G have appeared to inhibit cross wall lysis in Staphylococcus aureus. 3. The effects of 1/2 MIC of vancomycin on Staphylococcus aureus revealed the small surface depression, but the cross wall are normal appearance. 4. Specific abnormalities of Staphylococcus aureus by 1/2 MIC of gentamycin are not evident.

인터넷 데이터베이스와 온라인 데이터베이스의 검색시스템 검색효율 비교

안태경,김현희 明知大學校 文獻情報學會 1999 文獻情報學論集 Vol.- No.6

인터넷은 상용데이터베이스에 없는 정보와 상용데이터베이스와 거의 같은 정보를 무료로 입수할 수 있는 경우도 있으며 새로운 정보원으로서 중요성을 더해가고 있다. 전문 검색사들은 어떤 때 무슨 온라인 정보원을 이용해야 하는지에 관한 안내가 필요하게 되었다. 따라서 본 연구에서는 먼저 인터넷 데이터베이스와 상용 데이터베이스의 특성을 기존 연구 결과들에서 살펴본 후 두 탐색의 검색 효율성을 측정하기 위해서 이용자에게 의뢰 받은 정보 질문들을 이용하여 실험을 한 후 두 시스템의 탐색 결과를 분석하여 검색소요시간, 최종검색 건수, 적합성 등을 비교해 보았다. 실험 결과, 검색소요시간은 4명의 정보검색사가 6개의 질문 모두를 검색하는데 소요된 시간은 인터넷 평균 14.67분, 상용온라인 평균 4.75분으로 인터넷은 상용온라인 보다 약 3배의 검색시간이 소요되었다. 또한 정보검색속도의 문제는 검색성능과도 관련이 있지만 비용의 문제가 제기 되었다. 적합성 측정에서는 검색자와 질문자 적합성을 측정하였는데 모두 유사한 평가를 하고 있었다. 데이터베이스의 유형별 정보검색의 적합성 측정은 인터넷 데이터베이스에는 수치데이터, 연구기관자료, 디렉토리형 정보원, 기업의 동향분석자료 등에 강한 것으로 나타났다. 상용온라인 데이터베이스는 학술지의 전문(full-text), 학술지의 서지데이터에서 우수한 것으로 적합성이 평가 되었다.