김치에서 분리한 Lactobacillus sp. JC-7과 Lactobacillus acidophilus 88간의 Electrofusion 최적조건 설정

조영배,최현정,백형석,전홍기 부산대학교 유전공학연구소 1997 분자생물학 연구보 Vol.13 No.-

김치 발효 숙성기간을 연장하고 신선도를 오랫동안 유지 할 수 있는 김치발효 starter의 개발을 목적으로 최적숙성기에 있는 김치로부터 bacteriocin생성능이 없는 유산균을 분리하여 동정하였으며, bacteriocin생성능이 우수한 L.acidophilus 88을 융합시키기 위해 electrofusion에 대한 최적 조건을 검토하였다. 분리균주는 Lactobacillus속으로 동정되어 Lactobacillus sp. JC-7이라 명명하였다. Electrofusion에 의해 생성된 융합주를 식별하기 위해 streptomycin(2.5㎎/ml)에 내성을 나타내는 Lactobacillus sp. JC-7변이주와 kanamycin(600㎍/ml)에 내성을 나타내는 L.acidophilus 88변이주를 분리하였다. Electrofusion을 100V/㎝, 120msec(72ohms,1670 capacitance) 에서 수행했을 때 융합효율이 가장 양호하였으며 전기장의 세기와 시간이 중가할수록 융합 효율이 현저히 감소하였다. 2가 양이온은 농도가 중가할수록 대체적으로 융합효율을 감소시키는 경향을 나타내었으나 1mM MGCl_2에서는 대조군에 비해 융합효율이 약간 증가하였다. PEG매개에 의한 융합법의 융합효율을 비교한 결과, 융합효율은 chemical fusion<electrofusion<electrofusion+20% PEG순을 나타내었다. Evaluation of Optimum Conditions for the Electrofusion between Lactobacillus sp. JC-7 Isolated from Kimchi and Lactobacillus acidophilus 88. Young-Bae Jo, Hyun-Jung Choi, Hyung-Suk Baik and Hong-Ki Jun*. Department of Microbiology, Pusan National University, Pusan 609-735,Korea-A lactic acid bacterium was isolated from kimchi. The isolated strain was identified as the genus Lactobacillus thrugh its morphological characteristics and named as Lactobacillus sp. JC-7. The optimum conditions for the electrofusion between streptomycin(2.5㎎/ml)resistant mutant of Lactobacillus acidophilus 88 and kanamycin(600㎍/ml) resistant mutant Lactobacillus sp. JC-7 were evaluated. The highest number of fusants were obtained at a capacitance value of 120msec(1670㎌), a field strength of 100V/㎝,and a pulse controller setting of 72Ω. The potimum pH of elecroporation buffer was 7.5 and the concentration of divalent cation was 1mM MG^2+. Electrofusants were efficiently obtained by addition 20% polyethylene glycol to electroporation buffer. The yield of fusion was better than that of using polyethylene glycol mediated chemical induction.

개심술(開心術)의 임상적 고찰 : 치험 200예 200 Cases

최형호,서홍주,임영혁,김정중,배대양,이석기,임진수 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.2

Background and Objectives: Two hundred cases of the open heart surgery due to congenital and acquired heart disease were done using the cardiopulmonary bypass in the Department of Thoracic and Cardiovascular surgery, Chosun University Hospital from November, 1980 to June, 2001. Material and Methods: The number of congenital heart disease was 132 cases. 68 cases were acquired heart disease. 'The age of the congenital heart disease was from 22 days to 45 years. In the acquired heart disease, the age was from 14 to 72 years. Result: Congenital heart disease consisted of 113 congenital acyanotic heart disease, 19 congenital cyanotic heart disease. Corrective operation was done for congenital heart disease with 4. 5 % operative mortality. Of 68 cases acquired heart disease, 44 patients were valvular heart disease, 3 cardiac tumors, 9 ischemic heart diseases, 12 aortic dissections and etc. The operative mortality was 13%. Conclusion: The postoperative complications were appeared in 68 cases and the complications were wound infection, occipital alopecia, low cardiac output syndrome, arrhythmia, septicemia etc. The mortality after open heart surgery was 15 cases and the causes of death were low cardiac output syndrome, septicemia, respiratory failure and left ventricle rupture.

농장 사육되는 타조에서 나타난 다리 기형의 증례 보고

최종윤,손화영,전무형,조성환,김혜성,류시윤,박배근,이영원,윤원기 충남대학교 수의과대학 동물의과학연구소 2001 動物醫科學硏究誌 Vol.9 No.-

Two farmed young ostrich chicks were applied to pathology laboratory at Chungnam National University. Grossly, one ostrich showed rotated tibiotarsus, the other showed rolled toes. Case 1 ostrich was hypertrophy of fibualis longus and tibial cranialis tendon and gastrocnemius tendon in crus, inflammation of flexor digitorum longus. In histopathological views, myocytes of fiburalis longus were showed hypertrophy and hyperplasia. It is not found any specific feature in X-ray of the case 2 ostrich. Limb deformities were detected frequently in farmed ostrich chicks in 2- to 3 weeks old. Limb deformities were an important cause of mortality in farmed ostrich chicks during the first 10weeks after hatch. Cause of limb deformities were considered a nutrition problem.

디지털 제어에 의한 단상유도전동기의 범용 기동기 설계

최창주,서강성,박수강,조금배,백형래,임병옥 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2

Single phase induction motor(SPIM) is one of the most widely used type of low power AC motors in the world, especially for domestic or commercial applications where a three phase power supply is not available. Fractional horse power single phase induction motors have no starting torque their own. So there are several ways of starting single phase induction motors. The most common type is the starting capacitor installed in series with the auxiliary winding to increase the starting torque. Also, the auxiliary winding is disconnected once the speed of the motor reaches 70 to 80% of the rated speed. In the conventional systems, this function is conducted by a centrifugal switch. But the mechanical centrifugal switch has many problems such as switch malfunction. This paper presents the new methods of universal starting switch by digital controller to overcome these shortcomings of centrifugal switch.

난소의 미성숙 기형종 1예

최기욱,김흥곤,문형배 圓光大學校 醫科學硏究所 1994 圓光醫科學 Vol.10 No.1-2

The immature teratoma is the third most commin germ cell tumor of the ovary. It contains a variable amount of immature tissue derived from the three germ cell layers-ectoderm, mesoderm and endoderm. Most commonly the immature elements are neural origin. With the usage of chemotherapy following appropriate surgery, prognosis for patient with malignant germ cell tumor was improved considerably. We had experienced a case of immature teratoma of ovary. We report the case with review of the concerned literatures.

부대동맥 림프절 또는 쇄골상부 림프절에 국한된 전이가 있는 재발성 자궁경부암 환자들의 예후에 관한 연구

최석철,문형배 동국대학교 의학연구소 1998 東國醫學 Vol.5 No.-

자궁경부암에서 림프절 전이가 병소의 재발이나 환자의 예후에 악영향을 미친다는 것은 주지의 사실이다. 그러나 자궁경부암으로 일차치료 후에 재발한 자궁경부암 환자들 중에서 부대동맥 및/혹은 쇄골상부 림프절에 전이가 있는 환자들의 임상적 특징 및 예후에 대해서는 잘 알려져 있지 않다. 따라서 본 연구는 자궁경부암으로 근치적 전자궁적출술 및 골반림프절 절제술이나 방사선치료 후에 재발한 환자들 중 부대동맥 및/혹은 쇄골상부 림프절에 전이가 있는 환자들의 임상적 특징 및 예후에 대해 알아보고자 하였다. 1991년 1월부터 1995년 12월 까지, 원자력병원 산부인과에서 자궁경부암으로 일차치료 후 전산화 단층촬영 및 세침흡인 세포검사에서 부대동맥 및/혹은 쇄골상부 림프절전이가 증명된 재발성 자궁경부암 환자 55명을 대상으로 하였다. 1. 대상환자 55례 중 부대동맥 림프절에 국한된 전이가 있었던 경우는 31례(56.4%)였으며, 쇄골상부 림프절에 전이가 있었던 경우는 24례(43.6%)였다. 쇄골상부 림프절에 전이가 있었던 24례 중 8례는 쇄골상부 림프절에 국한된 전이가 증명된 경우(Supraclavicnlar lynph node : SCLN only군)였고, 나머지 16례는 부대동맥 림프절 및 쇄골상부 림프절에 전이가 동시에 있는 경우(both군)였다. 2. FIGO 임상병기별 분포는 Ⅰ기 9.1%, Ⅱ기 56.4%, Ⅲ기 32.7%, Ⅳ기 1.8%였다. 세포형태에 따른 림프절 전이율은 편평상피세포형이 96%(53/55)였다. 대상환자 55례 중 22례(40.0%)는 일차치료 당시 이미 골반림프절에 전이가 있었던 경우였다. 대상 환자들의 원발암 치료는 방사선 치료만을 시행 받은 경우가 60.0%(33/55), 방사선 치료와 항암화학요법을 시행 받은 경우가 18.2%(10/55), 수술 및 방사선 치료, 항암화학요법을 시행 받은 경우가 18.2%(10/55), 그리고 수술 및 방사선 치료를 시행 받은 경우가 3.6%(2/ss)였다. 3. 전체 연구대상 환자 55례의 3년 생존율은 14.4%이었으며, 부대동맥 림프절전이군과 쇄골상부 림프절전이군의 3년 생존율은 각각 15.4%, 10.7%이었고, SCLN only군 및 both군의 3년 생존율은 각각 0%, 19.7% 이었다. 결론적으로, 쇄골상부 림프절 전이가 있는 환자는 부대동맥 림프절에 국한된 전이가 있는 환자보다 3년 생존율이 낮음을 알 수 있었으며, 이에 따라 재발성 자궁경부암 환자에서는 쇄골상부 림프절의 전이 유무가 환자의 예후를 추정하는데 중요한 지표가 될 것으로 생각되었다. It is evident from previous reports that in patients with cervical cancer with metastases to lymph nodes have unfavorable outcome, there are, however, few reports have previously been made of the clinical characteristics and prognosis of patients with metastasis limited to para-aortic lymph nodes(PALN) only versus supraclavicular lymph nodes(SCLN) following primary treatment. This paper attempts to discuss the outcome of Patients with recurrent cervical cancer metastasis limited to these lymph nodes. This report is a retrospective analysis of 55 patients with recurrent cervical cancer metastasis limited to para-aortic or supraclavicular lymph nodes following radical hysterectomy or definitive radiation therapy treated at the Korea Cancer Center Hospital, from January 1991 through December 1995. The results were as follows. 1. Of the 55 patients entered, 31(56.4%) had positive nodes on para-aortic area only and 24(46.3%) had positive nodes on supraclavicular area. 8 of 24 patients had limited metastasis to SCLN only and 16 had metastatic nodes on both para-aortic and supraclavicular area. 2. The distribution of patients according to initial FIGO stage were 9.1% in stage Ⅰ, 56.4% in stage Ⅱ, 32.7% in stage Ⅲ, and 1.8% in stage Ⅳ. In 96.4%(53/55) of cases, the histologic type was a squamous cell carcinoma. 22(40.0%) of 55 patients had pelvic lymph node metastasis at the time of initial treatment. The distribution of patients by treatment modalities prior to recurrence was 60.0%(33/55) for patients treated with radiotherapy alone, 18.2%(10/55) for patients treated with combined chemotherapy and radiotherapy, and 18.2%(10/55) for patients treated with combined surgery, radiotherapy, and chemotherapy. 3. The overall 3-year survival rate for patients with positive nodes on para-aortic or supraclavicular area was 14.4%; those who had lymph nodes limited to para-aortic only achieved 15.4%; those who had lymph nodes limited to supraclavicular lymph node achieved 10.7%. Of these, those who had nodes on supraclavicular lymph node only or both supraclavicular and para-aortic lymph node achieved 0% and 19.7% 3-year survival rate, respectively. In conclusion, the outcome for patients with metastasis to supraclavicular lymph nodes was worse than for patients with metastasis to para-aortic lymph nodes only. This suggest that the presence of metastatic carcinoma on supraclavicular lymph node may be a reliable Predictor of probability of survival in such patients.

내용기반 분류에 의한 비디오 검색 시스템 설계

배종식,남윤성,양동일,최형진 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

We suggest how to search news data by dividing structurely, by classifying meaningly, and by itemizing them by contents. The structural division divides the scene using correlative information between frames such as the distribution of the space brightness and the irregularity of brightness, and time relation etc. The meaning classification means to classify the detailed contents of news video as articles comparing special information extracted frame key frame with previous knowledge information. This study classifies the articles as the anchor's scene and the non-anchor's scene using the character that the progress of news is repeated centering around the anchor frames by periods. We get the non-anchor's scene to search the news data itemizing speech scene, interview scene and general scene, and classifying as articles. Also, we use the function of searching for summary by news icons and search the caption by processing the integration of caption, and design them to be able to search the news video quickly classifying news video as contents and indexing them.

멀티 프레임 PRA를 이용한 움직임 추정

김형종,이성순,최영일,조금배,한승조 조선대학교 동력자원연구소 1997 動力資源硏究所誌 Vol.19 No.1

We discuss the theory of motion estimation and motion compensation. The proposed algorithm uses more information from the input video image sequence than the traditional two-frame pel-recursive algorithms. And it uses fewer assumptions on the motion vectors among different video frame pairs. This paper shows two three-frame pel-recursive algorithm for predictive motion compensation which can estimate the d₁(from the previous frame f_t-1 to current frame, f_t) and d₂(from the frame before the previous frame f_t-2 to the previous frame, f_t-1) simultaneously, and three frame information to update the motion vector d₁when the past motion vector d₂is available.

천마의 항 불안 효과

김여환,최형철,손의동,이광윤,김원준,박형배,하정희 대한생물치료정신의학회 1996 생물치료정신의학 Vol.2 No.2

천마(Gastrodia elata Blume)의 근경을 말린 것은 한방에서 오래전부터 여러 형태의 간질발작 치료 목적으로 이용되어지고 있었으나 어떤 활성물질에 의해 또 어떤 작용 기전을 통해 약리작용을 나타내는지를 충분하게 설명하지 못하고 있다. 최근 항경련 작용기전 연구 결과 천마추출물의 GABA성 신경전달계에 대한 조절작용과 관련이 있을 것이라는 연구 결과가 보고되었으며, 소량으로도 뇌억제 및 진정작용이 있다는 문헌을 참고하여 볼 때 천마의 항불안 작용 가능성이 시사되었다. 이에 본 연구를 통하여 천마를 사용하여 실험동물에서 항불안 작용을 검색하고 그 작용기전의 일부를 밝히고자 항불안작용 기전에 중요한 benzodiazepine 수용체와의 상호작용을 관찰하였다. 실험 결과, 천마 추출물의 경구 장기투여는 생쥐의 elevated plus maze 검사에서 개방 통로에로의 진입 및 개방통로에서의 체류시간을 증가시킴으로써 항불안 효과를 나타내었다. 천마의 에탄올 추출물은 benzodiazepine수용체 길항제인 [³H] Ro15-1788결합을 억제하였으며, 천마 추출물은 [³H] Ro15-1788의 수용체 결합에 대한 최대 결합력(Bmax)은 변화시키지 않고, 친화력(affinity)을 감소시킴으로써 상경적인 결합 양상을 나타내었다. 또 천마의 에탄올 추출물은 benzodiazepine 수용체의 효현제인 flunitrazepam의 수용체 결합반응을 억제시켰는데, 이러한 억제는 GABA 존재하에서 항진되는 것을 관찰하였다. 이상의 결과로 미루어보아 천마의 에탄올추출물 내에는 항불안작용을 나타내는 성분이 함유되어 있을 가능성을 예상케한다. Gastrodia elata Blume is a medicinal plant which has been used as anticonvulsant in oriental medicine, and has been used as sedatives. A survey of the relevant literature has indicated that the putative anxiolytic activity of G.elata Bl. has not been scientifically investigated. Therefore, the present study was designed to assess anxiolytic property and interaction with benzodiazepine receptor of G. elata BI. The putative anxiolytic activity of ethanol extract of G. elata BI. was performed in mice using an elevated plus maze paradigm. Chronic oral administration of G. elata BI. showed anxiolytic action in mice. It was suggested that regulation of GABAergic neurotarnsmission may be important in the action of G. elata BI. The interaction of G. elata BI. with benzodiazepine receptor was investigated using rat cortices. Ethanol extract of G. elata inhibited the binding of [³H] Ro15-1788, a selective benzodiazepine receptor antagonist to benzodiazepine receptor. The inhibition of [³H] Ro15-1788 binding by G. elata BI. appeared to be competitive. Further, GABA significantly enhanced the potency of this extract in inhibiting [³H] flunitrazepam, a selective benzodiazepine receptor agonist, binding to benzodiazepine receptor. From these findings, it can be concluded that substance or substances with neurochemical properties characteristic of a benzodiazepine receptor agonist may contribute to the anxiolytic property of G. elata BI.

Human Chorionic Gonadotropin(HCG)에 의한 넙치, Paralichthys olivaceus의 배정효과

손진기,최희정,이영돈,김형배,박인석 濟州大學校海洋硏究所 1992 해양과환경연구소 연구논문집 Vol.16 No.-

넙치(Paralichthys olivaceus)에서 호르몬 처리에 의한 효과적인 인공산란 연구의 일환으로 human chorionic gonadotropin(HCG)에 의한 성숙 넙치에서의 spermatocrit법에 의한 배정(spermiation)효과를 연구하였다. 안정된 spermatocrit치를 위한 정액의 분획조건은 12,000rpm, 30분간의 원심분리가 적절하였으며 spermatocrit(Y)는 정자밀도(X)와는 Y=1.14X-10.04(r=0.91, P<0.0001, n=50)의 관계식을 나타내었다. 정자밀도는 21.5∼98.4×10??정자/㎕정액으로 12∼95%의 spermatocrit치에 해당하였다. 성숙넙치의 정액생산은 1,000IUHCG/㎏BW의 주사시 24시간후에 가장 높았고(7.46㎖/㎏BW), 낮은spermatocrit치(63%)와 낮은 정자밀도(67.4×10??정자/㎕정액)수준과 일치하여 정액점도는 매우 낮게 나타났다. 이와같은 낮은 정액점도는 HEG처리에 의한 정소의 수화(hydration)에 기인된 것으로 여타 lobular형 정소에서의 호르몬 처리시 결과와 일치하였다. 48시간후의 HCG처리군과 대조군간의 정액생산, spermatocrit치 및 정자밀도에서는 유의한 차이를 보이지 않았다. 본 연구결과 성숙넙치의 배정은 spermatocrit법에 의해 명확히 판별될 수 있으며 HCG는 본 종에서 배정을 효과적으로 촉진시킬 수 있음이 나타났다. For the evaluation of hormonal control of sperm in cultured fish a method to quantify the spermiation response of mature flatfish to hormonal therapy is described. Spermatocrit was determined after 30 min. in centrifuge condition of 12,000rpm. Sperm density was estimated by a standard hemacytometer method. However, sperm density can be predicted from spermatocrit since their relationship is linear as described by the regression equation, Y=1.14X-0.04(r=0.91, P<0.0001, n=50), where Y is spermatocrit and X is sperm density. Sperm density levels ranged from 21.5 to 98.4×10?? spermatozoa per ㎕ milt corresponding to spermatocrit values of 12 to 95%. Milt production by mature flatfish was highest(7.4ml per ㎏ body weight) at 24h after injection of 1,000IU of human chorionic gonadotropin(HCG) per ㎏ body weight and coincided with low spermatocrit(63%) and sperm density(67.4×10?? spermatozoa per ㎕ milt) levels. No significant differences was appeared in milt production, spermatocrit and sperm density between control and HCG-treated fish at 48h after HCG injection. These results demonstrate that spermiation in mature flatfish can be reliably evaluated by a spermatocrit method and that HCG is effctive in stimulating of spermiation in this species.