• Journal of Yeungnam Medical Science
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• 제40권4호
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• pp.461-465
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• 2023

• 대한수의학회지
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• 제37권2호
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• pp.245-252
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• 1997

To investigate morphological changes in the exocrine pancreas of chicken after pancreatic duct ligation, experimental animals were subdivided to control, 12 hours, 1 day, 2 days, 4 days, 7 days and 10 days groupes and all of three pancreatic ducts of chicken were ligated by surgical procedure and then the morphological changes were observed. In pancreatic ducts, once for a while the ducts were dilated on 12 hours after pancreatic duct ligation and then they were obstructed because of proliferated epithelial cells and connective tissues in pancreatic duct. Marginal dissociation of acini was detected in 12 hours after pancreatic duct ligation and then dissociation of acini was increased with time and finally in 4 days after pancreatic duct ligation the acini showed completely dissociation except periductular regions and around pancreatic islets. Most of dissociated acini cells showed marginal condensation of nuclear chromatin and atropy of cytoplasm, namely, apoptotic features were detected in dissociated acinar cells. Interacinar spaces of dissociated acinar regions were dilated and fulfilled with increased connective tissue and in 4 days after pancreatic duct ligation, deposition of lymphocytes and hemocytes was occurred.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권9호
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• pp.3583-3597
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• 2020

In this paper, a parallel deep learning model using a convolutional neural network and a dilated convolutional neural network is proposed to classify Alzheimer's disease with high accuracy in PET/CT images. The developed model consists of two pipelines, a conventional CNN pipeline, and a dilated convolution pipeline. An input image is sent through both pipelines, and at the end of both pipelines, extracted features are concatenated and used for classifying Alzheimer's disease. Complimentary abilities of both networks provide better overall accuracy than single conventional CNNs in the dataset. Moreover, instead of performing binary classification, the proposed model performs three-class classification being Alzheimer's disease, mild cognitive impairment, and normal control. Using the data received from Dong-a University, the model performs classification detecting Alzheimer's disease with an accuracy of up to 95.51%.

• 환경생물
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• 제33권2호
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• pp.160-169
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• 2015

Three unrecorded species of free-living marine nematodes, belonging to genus Enoplus Dujardin, 1845 collected from rocky intertidal seagrass on the eastern coast of Korea, are described and illustrated. Enoplus taipingensis Zhang and Zhou, 2012 is characterized by longer body size, a series of lateral setae throughout the tail in male, the presence of trumpet-shaped precloacal supplement with well-dilated proximal end, and the presence of spicules with five to eight semicircular plates. Enoplus meridionalis Steiner, 1921 is characterized by the presence of trumpetshaped precloacal supplement with slightly dilated proximal end, paired massive spicules, and tail with two pairs of stout terminal setae. Enoplus mammillatus Timm, 1959 is easily distinguished from the congeners by narrow tubular-shaped precloacal supplement. In this study, we provide detailed morphological features of three Enoplus species by differential interference contrast microscopy and scanning electron microscopy. This is the first report on the species of the genus Enoplus from the Korean waters.

• Journal of Chest Surgery
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• 제15권2호
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• pp.222-229
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• 1982

The aneurysmal dilatation of ascending aorta with the aortic regurgitation presents typical surgical problems. Over the years, various surgical procedures had been used for the management of the dilated segment of sending aorta and the aortic regurgitation. The surgical technique Is still in the state of evolution. The one method is the super coronary replacement of the ascending aorta with vascular graft and replacement of the aortic valve with preservation of the coronary ostia as advocated by Miller and his colleague at Stanford University, so called conventional technique". The other is the replacement of aortic valve and the dilated segment of the ascending aorta using a composite graft and transplantation of the coronary ostia as described by Bentall and DeBono in 1968. The controversy appears to evolve around 3 technical problems. One is bleeding from the grafted area. Two is later development of the aneurysmal dilatation of the subcoronary aortic wall when non-composite graft is employed. Three is a management of the coronary arteries. The purpose of this article is to present our experience with 7 cases of annuloaortic ectasia in whom both of these surgical techniques at that employed and to review some of the problems that encountered during the management of these patients .

• Journal of Chest Surgery
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• 제20권1호
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• pp.202-208
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• 1987

Congenital coronary artery fistula is a rare condition, and with widespread use of cardiac catheterization, angiography and selective coronary arteriography are being recognized with increasing frequency. Fistula originating from the right coronary artery are more common then those from the left coronary artery. The fistula empties into the right side of the heart in 90% of the cases with the right ventricle being the most common recipient chamber followed by the right atrium and the pulmonary artery. Recently we experienced two cases of congenital coronary artery fistula which originated from the left coronary artery each other. The first case was 17 moth-old-male, who have had the symptoms of frequent URI, dyspnea and continuous murmur in physical examination. The fistulous communication was noted between the left circumflex coronary artery and the right ventricle with aneurysmal dilation of RV wall. The proximal opening of the fistulous tract was directly close with partial aneurysmorrhaphy of RV wall. Also the termination site of fistulous tract in RV chamber was closed. The second case was 35-year-old female, who have had the symptom of exertional dyspnea and continuous murmur in physical examination. The tortuous and dilated fistulous tract was noted between the left anterior descending coronary artery and the pulmonary artery. The proximal opening of the fistula was ligated near the left anterior descending coronary artery with preservation of normal continuity of coronary artery. And the dilated tortuous vessel was excised. Also the terminal site in pulmonary artery was directly closed just above the pulmonic valve. Postoperative hospital courses of two patients were uneventful without any specific complications and discharged without problems.

• 한국통신학회논문지
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• 제22권6호
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• pp.1137-1147
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• 1997

정상 링크와 대체 링크로 구성된 스위칭소자를 갖는 RZETA망을 제안한다. RZETA망의 정상 링크로 사용되는 modified Zeat망과 대체 링크로 사용되는 다단계상호연결망은 그래프 이론에 의해 생성한다. 2개의 다단계상호연결망을 병합함으로써 RZETA망을 생성한다. modified Zeat망이 넌블럭킹되기 위한 필요충분 조건을 제시한다. 이 조건은 RZETA망의 링크나 스위칭 소자가 단일 결함이 있을 때 넌블럭킹되기 위한 충분 조건이다. 2-dilated Banyan망의 성능 분석 모델을 수정하여 RZETA망의 성능 분석을 하고 각 근원지의 입력 패킷 도착률이 1일 때 기존의 중복 경로를 갖는 망과의 성능을 비교한다.

• Applied Microscopy
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• 제26권3호
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• pp.315-328
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• 1996

This study aims to demonstrate the effect of SOD (superoxide dismutase), one of the antioxidant enzymes, on the ultrastructural changes in the parietal cells caused by the administration of cisplatin in the rat. A total of 60 healthy Sprague-Dawley rats weighing about 200 gm were used as experimental animals. Cisplatin (6 mg/kg) was administered intraperitoneally to rats pretreated with 15,000 unit/kg of SOD or rats without the pretreatment. The experimental animals were sacrificed at 6 hours, 12 hours, 24 hours and 3 days after the administration of cisplatin. The results were as follows: 1. SOD alone did not affect the ultrastructural changes in the gastric parietal cells in the rat. 2. Irregular shaped mitochondria, mitochondria with dim cristae, dilated cristae, ruptured outer membrane, electron lucent matrix and degenerative mitochondria were seen in cisplatin treated rat. Whorled membranous body, many lysosomes and large vacuole were observed in the gastric parietal cells in cisplatin treated rat. 3. Mitochondria with dilated cristae and electron lucent matrix and irregular shaped mitochondria were observed in the gastric parietal cells of the cisplatin treated rat with pretreatment of SOD. These results suggest that SOD attenuates the toxic effect of the cisplatin in the gastric parietal cells of the rat.

• 한국어병학회지
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• 제25권1호
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• pp.59-65
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• 2012

인공종묘 생산 철갑상어 사육과정에 복부팽만을 특징으로 하는 질병이 발생하였다. 병어는 위와 소화관의 가스의 이상 축적에 의한 것으로 특히, 위의 분문부에서의 가스 축적이 현저하기 때문에 이상 유영을 하다가 폐사하게 된다. 병어의 위, 양어지의 배출수와 잔사에서는 원인체로 추정되는 Candida sp.가 검출되었다. 먹이와 함께 섭취된 Candida가 대사 과정 중에 발생하는 가스가 위에 축적됨으로서 위가팽창하게 되고, 일부는 식도와 부레로 이동한 것으로 생각된다.

• Journal of Ginseng Research
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• 제9권1호
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• pp.1-8
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• 1985

Preventive effect of ginseng saponin fraction against ethanol intoxication of the liver of rats fed width 12% ethanol instead of water for 6 days was investigated. Control group was dosed 12% ethanol instead of water (free access) for 6 days and test group was dosed 0.1% ginseng saponin fraction in the 12% ethanol instead of water for 6 days. Normal rats was given only water freely. It was observed that the activities of alcohol dehydrogenase (ADH) and Microsomal ethanol oxidizing system (MEOS) of both control and test groups were higher than those of normal group while the activity of aldehyde dehydrogenate (ALDH) of control and test groups were lower than that of normal rats, However, the ALDH activity decrease of test group was much less than that of control groups. Electron micrograph showed that severely swollen and disrupted mitochondria and dilated and vesiculated ER can be seen in control group while dilated or vesiculated ER are very few and swollen or disrupted mitochondria can not be seen in test group. From the above experimental result, it seems that ginseng saponin might stimulate ethanol oxidation and the removal of acetaldehyde resulting in the decrease of ethanol intoxication of the liver.