• Anatomy and Cell Biology
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• 제57권1호
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• pp.61-69
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• 2024

Hypogonadism is associated with an increased risk of coronary artery disease. This study sought to describe the histomorphology of the left coronary arteries of the adult male rabbit following orchiectomy and subsequent testosterone administration. We included 20 adult male rabbits, divided into a baseline group (n=2), an interventional group subjected to castration only (n=6), an intervention group subjected to castration followed by testosterone injection (n=6), and a control group (n=6). Key variables under investigation were serum testosterone levels, the intima-media thickness of coronary arteries, smooth muscle cell density, and adventitial collagen fiber density. The mean coronary arteries' intimal medial thickness was significantly higher in the castrated group than in controls (0.488 mm and 0.388 mm, respectively), while the testosterone-injected group had a mean of 0.440 mm. Mean smooth muscle cell density was significantly lower in the castrated rabbits vs. controls (26.96% and 47.80%, respectively), this observation being reversed with testosterone injection (47.53%). Mean adventitial collagen fiber density was significantly higher in the castrated group than in controls (66.6% and 36.1%, respectively), with a marginal difference after testosterone injection (65.2%). This study demonstrates that castrationinduced hypogonadism causes morphological changes in the coronary arteries that are partly reversible using testosterone injections. These findings provide a morphological basis for understanding the role of testosterone in coronary arteries.

• 한국치위생학회지
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• 제14권2호
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• pp.281-286
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• 2014

Objectives : The aim of this study is to evaluate the surface changes of enamel specimen, tooth structure by toothpastes in child and adult. Methods : Experimental teeth were collected from extracted human primary teeth. 120 enamel specimens were prepared by cutting the teeth into $2{\times}3{\times}2mm$ blocks using diamond saw and the specimens were assigned to 3 groups. Group 1 was used as control with no treatment. Group 2 was treated with child toothpaste and Group 3 was treated with adult toothpaste on primary enamel surface for 3 minutes daily over 4 weeks. The specimens were immersed into individual container having artificial saliva and the artificial saliva was changed every day. The electron probe micro analyzer(EPMA) provided weight percent(wt%) of calcium(Ca) and phosphorous(P) on enamel surface. The morphology was analyzed by scanning electron microscopy(SEM). Data were analyzed by one-way analysis of variance(ANOVA) and Tukey's test post-hoc test using SPSS(Version 20, SPSS Inc., Chicago, USA). Level of significance was set at 0.05. Results : The surface changes of the primary teeth revealed a significant difference during 4 weeks. Calcium(Ca) and phosphorous(P) levels were found the weight percent difference and a rough enamel surface was seen on SEM after adult toothpaste application. Conclusions : The changes in Ca and P and the morphological surface were affected by the primary tooth treated with adult toothpaste. Enamel surface showed significant differences during 4 weeks.

• 한국컴퓨터정보학회논문지
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• 제29권8호
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• pp.133-145
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• 2024

본 연구는 사이즈코리아의 제8차 인체치수데이터 중 3차원 계측자료를 활용하여 20~69세 남성의 어깨와 팔 관련 항목을 비만도에 따라 분석하여 남성의 어깨와 팔 형태를 유형화하고자 하였다. 이를 통해 밀착되는 소매 개발에 필요한 기초자료를 추출하고자 하였다. 20~69세 성인 남성의 어깨와 팔 관련 요인은 어깨와 팔의 수직 요인, 어깨와 팔의 수평 요인, 어깨길이와 너비 요인, 어깨기울기 요인 등 4개가 추출되었다. 성인 남성의 어깨와 팔은 4개로 유형화되었다. 넓고 처진 어깨 가늘고 긴 팔, 좁고 처진 어깨 굵고 긴 팔, 넓고 솟은 어깨 짧고 굵은 팔, 좁고 솟은 어깨 짧고 가는 팔 등이다. 저체중군은 20대, 30대, 60대에서는 유형 1의 비중이 높았고, 40대에서 유형 4의 비중이 높았다. 정상체중군은 20대와 30대에는 유형 1의 비중이 높았고, 40대, 50대, 60대에는 유형 4의 비중이 높은 것으로 분석되었다. 비만군은 20대, 30대, 40대에는 유형 3의 비중이 높고, 50대와 60대에는 유형 4의 비중이 높았다.

• 한국전자현미경학회:학술대회논문집
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• 한국현미경학회 1995년도 제26회 춘계학술대회 연제초록
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• pp.26-27
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• 1995

• 수산해양기술연구
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• 제51권4호
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• pp.527-534
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• 2015

The twenty six specimens of leptocephali (15.8-32.6 mm TL) of the family Congridae, collected from southeastern waters offshore of Jeju Island during August 2014, and were identified by means of morphology and genetics. Those specimens were identified as belonging to the family Congridae based on various combinations of morphological characters. An analysis of the partial 12S rRNA sequences (886 base pairs) of mitochondrial DNA showed that our specimens must be Gnathophis nystromi, because their sequences were concordant with those of G. nystromi adult (genetic distance= 0.001), furthermore their total myomeres being consistent with those of G. nystromi adult. Catch rates of G. nystromi leptocephali were higher in the offshore regions than coastal regions of Jeju Island. The smallest leptocephali (< 20 mm TL) were collected offshore from Jeju Island. We hypothesize that one of the spawning grounds of G. nystromi is located offshore in the Jeju Island. In conclusion, the hatched preleptocephali of G. nystromi might have been transported from offshore near Jeju Island to the Korea Strait by the Kuroshio Current and Tsushima Warm Current.

• Parasites, Hosts and Diseases
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• 제56권5호
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• pp.463-475
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• 2018

The present study was performed to observe histopathological effects of Oculotrema hippopotami Stunkard, 1924 infection in the eye of Hippopotamus amphibius, as well as to reveal new details of morphology and structural features of this monogenean and its comparison between 2 age stages of the parasite. This was done using both light and scanning electron microscopy, energy dispersive X-ray analysis (EDXA) and histopathology. The presence of a mixture of different generations (adult and sub-adult) in one host individual is common for Oculotrema Stunkard, 1924 in contrast to Polystoma Zeder, 1800. New metrical and graphical information obtained for adults and sub-adults compared with the previous studies. Here we show the presence of genital papillae in adults, metrical data on the distal part of the vas deferens. SEM micrographs of sperm ejaculatory structures and information about the flattened dorsal side of the body provided for the first time. Histopathological changes, such as necrosis and hemorrhage in host tissues as a result of O. hippopotami attachment structures are described. Structural analysis of different body parts of O. hippopotami of both age groups are also included. We show qualitative differences in the presence of hardening ions (S, P, Ca) in attachment structures (oral and haptor suckers) that increase with the age of the worm. The presence of sub-adults and adults on the same host, together with high levels of infection without high pathogenicity may account for Oculotrema being one of the most successful parasites among the Monogenea.

• 한국동물학회지
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• 제27권3호
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• pp.165-176
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• 1984

무당개구리 (Bombina orientalis Boulenger) 腹皮의 赤色 發現에 관여하는 赤色素細胞의 分化 過程을 電子顯微鏡으로 관찰하였다. 成體에서 관찰되는 赤色素細胞의 전형적인 구조는, 주위의 電子密度가 내부보다 낮은 多量의 carotenoid 顆粒들과, 불규칙한 膜狀, 纖維狀 EH는 同心圓狀의 lamella 構造를 가지는 小量의 pterinosome들이 腹皮의 基低膜을 따라 뻗어있는 赤色素細胞의 突起 속에 치밀하게 채워진 形態를 하고 있다. 分化된 最初의 赤色素細胞는 變態期의 前肢 출현시기를 전후하여, 外膜이 없고 電子密度가 낮은 carotenoid 顆粒이 뭉쳐져 있는 狀態로 나타나며 pterinosome은 관찰되지 않는다. 腹皮의 赤色이 外部로 발현되기 시작하는 시기는 대\ulcorner 變態 後 $1 \\sim 2$週가 경과한 뒤이며, 이 시기에 未分化된 pterinosome들이 나타나기 시작한다. 産卵 後 1年이 경과한 어린 개구리에서 발현되는 外部 體色은 성숙한 成體와 동일하였지만, 관찰되는 色素 顆粒의 形態는 carotenoid 축적의 정도가 낮은 상태이며, pterinosome의 分化도 成體에 비해 현저하지 않았다.

• Parasites, Hosts and Diseases
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• 제37권3호
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• pp.189-194
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• 1999

A case of human infection with Heterophyes nocens (Heterophyidae) was incidentally found in a biopsy specimen of the Meckel's diverticulum at the upper part of the small intestine. The patient was a 58-year-old man living in a rural area of Talsong-gun, Kyongsangbuk-do.He had gastrointestinal symptoms such as epigastric pain, indigestion, and abdominal discomfort for 3 months, and severe diarrhea, abdominal pain, and vomiting for about 1 month before hospitalization. Endoscopy of the upper part of the small intestine revealed a Meckel's diverticulum, and it was excised and histo-pathologically examined. Three adult flukes were incidentally found sectioned in the mucosa, and they were identified as H.nocens. The patient had a history of eating raw mullets at a fish market in Pusan 6 months ago, and the mullets were presumed to be the source of infection. This case brings a considerable interest in that specific diagnosis of heterophyid infections could be done by sectional morphology of the worms.

• 대한수의학회지
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• 제53권3호
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• pp.155-158
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• 2013

Paedomorphosis is the retention of juvenile morphology at maturity and is important in generating evolutionary change in domestic species and species in the wild. This preliminary study compared morphological characteristics of seven domestic cat pure breeds and felid species from around the world. An original procedure based on elliptical Fourier (EF) methods was applied to head lateral views of specimens and were assessed in order to analyse head profile. For comparative purposes three domestic kittens of different ages and three species of genus Lynx were also used. EF descriptors, allowed for the quantification of the head profile. Using the Fourier transform, reconstruction of the mean head profile revealed that there was a general shape difference between wild cats, domestic cats and kittens. Results suggested that variability in head profile differentiate quite well between adult cats and kittens, but domestic and wild cats appeared grouped into a similar cluster. The similarity between breeds can thus be attributed more to the general head profile than to flatness, i.e. to the general conformation rather than facial profile. Therefore, no effect of paedomorphism on the studied breeds can be undertaken. The present approach opens interesting ethnological perspectives for the aloidic characterisation for domestic breeds.

• 보존과학회지
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• 제25권3호
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• pp.317-322
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• 2009

딱정벌레목 빗살수염벌레과의 Nicobium castaneum이 2006년 제주민속박물관 소장품, 2007년 미리벌민속발물관 소장품과 2008년 제주도에서 보관되어온 상여에서 목재를 가해하고 있음이 발견되었다. 본 종으로부터 목제 문화재의 보존을 위한 동정 및 해충 관리를 위해 성충 형태, 충공 및 갱도 등 가해 형태, 배설물 등에 관해 보고하는 바이다.