A case of thrombocytopenia overcome by splenic artery partial embolization

나종헌,이태희,강영우,최용우,허규찬,김선문,송경호,구훈섭,류기현 대한내과학회 2018 대한내과학회 추계학술대회 Vol.2018 No.1

중간지대치가 포함된 고정가공의치에서 골흡수에 따른 지대치 주위조직응력의 광탄성학적 분석

나종헌 慶北大學校 齒科大學 1996 慶北齒大論文集 Vol.13 No.-

저자는 하악 우측 제1소구치와 제1대구치가 상실되어 견치, 제2소구치, 제2대구치를 지대치로 하는 5본 고정가공의치에서 제 1대구치 부위에 수직 하중을 가할 때 정상적인 치조골, 치근 길이의 ½이 흡수된 치조골, 치근 길이의 ⅔가 흡수된 치조골 등 치조골 흡수 정도에 따라 각각 고정성 연결장치와 중간지대치 원심에 key와 keyway를 형성한 비고정성 연결장치를 장착한 경우 지대치 주위 조직에 나타난 응력분포를 3차원 응력 분석법으로 비교분석해 본 결과 다음과 같은 결과를 얻었다. 1. 모든 지대치 치근 주위에 압축 응력이 발생하였다. 2. 정상적인 치조골을 가진 경우, 두가지 연결장치 형태인 경우 사이에 뚜렷한 차이점이 없었다. 3. 치조골이 치근 길이의 ½이 흡수된 경우, 연결장치 형태에 따른 응력은 뚜렷한 차이점이 없었다. 4. 치조골이 치근 길이의 ⅔가 흡수된 경우, 비고정성 연결장치의 경우가 고정성 연결장치의 경우보다 더 많은 응력을 받는 부위가 많았다. 5. 고정성 연결장치간의 경우 및 비고정성 연결장치간의 경우, 치조골이 흡수될 수록 응력 집중이 많았다. We compared and analyzed the stress distribution of the tissues surrounding abutments by using a three-dimensional photoelastic stress analysis method, in case that each rigid and norigid connector (forming a key and a keyway to the distal of the intermediate abutment) was given according to thd alveolar bone loss such as a normal, a ½, and ⅔ absorbed ones in giving vertical load to the first molar at the five-unit fixed partial dentures whose abutments were the canine, the secoind premolar and the second molar because of the loss of the first premolar and molar on the right of the mandible. On this, the conclusion we reach is as follows: 1. A compressive stress was brought around the tissues of the roots of all the abutments. 2. In case of normal alveolar bone, there was no remarkable difference between two connectors. 3. In case of a ½-absorbed alveolar bone, there was no remarkable difference between two connectors. 4. In case of a ⅔-absorbed alveolar bone, there were more higher stress points when nonrigid connector was used than when rigid one was used. 5. Whether rigid or nonrigid connector used, the more the alveolar bone was absorbed, the more stress was concentrated.

울진 바다목장 주변해역 연성기질 조하대에 서식하는 대형저서동물의 군집구조

황강석,서인수,최병미,이한나,오철웅,김미향,최창근,나종헌 한국환경생물학회 2014 환경생물 : 환경생물학회지 Vol.32 No.4

In this study, we investigated the macrobenthic community structure and spatiotemporal variations in Uljin Marine Ranching area, East Sea of Korea. Macrobenthos were collected using a modified van Veen grab sampler from April to September 2013. Total number of species sampled was 345 and mean density was 5,797 ind. m-2, both of which were dominated by the polychaetes. The most dominant species were Spiophanes bombyx (53.64%), followed by Magelona sp.1 (6.96%), Cadella semitorta (2.73%), Lumbrineris longifolia (2.16%) and Alvenius ojianus (2.08%). Cluster analysis and nMDS ordination analysis based on the Bray-Curtis similarity identified 2 station groups. The group 1 (station 2, 3, 5, 6, 8 and 9) was characterized by high abundance of the polychaetes Magelona sp.1, Lumbrineris longifolia, Scoloplos armiger, Praxillella affinis, Maldane cristata and the bivalve Alvenius ojianus, with fine sediment above 30m water depth. On the other hand, the group 2 (station 1, 4, 7 and 10) was numerically dominated by the polychaete Lumbrineriopsis sp. and the bivalve Cadella semitorta, with coarse sediment below 5m water depth. Collectively, the macrobenthic community structure showed a distinct spatial trend, which seemed to be related to the water depth and sediment composition.

알츠하이머병과 피질하혈관치매의 언어유창성검사 수행능력 차이: 노인성치매임상연구센터 연구

안이서,김종헌,최성혜,정지향,구본대,심용수,나해리,이준홍 대한신경과학회 2016 대한신경과학회지 Vol.34 No.1

Background: The verbal fluency test consists of two separate tests of semantic fluency and phonemic fluency. The performance patterns of these tests differ with the type of dementia. We studied the patterns of verbal fluency between Alzheimer’s disease (AD) and subcortical vascular dementia (SVaD), and assessed the clinical utility of these tests. Methods: The 1,475 selected participants comprised 73 normal control subjects, 673 patients with amnestic mild cognitive impairment (aMCI), 535 AD patients, 42 patients with subcortical vascular mild cognitive impairment (svMCI), and 152 SVaD patients. We analyzed the z-score for the total number of animal items as a semantic fluency index and the z-score of the phonemic total score as a phonemic fluency index. Results: The performance of semantic fluency was lower than that of phonemic fluency in all groups. The SVaD group showed the worst scores and abnormal performances on both tests, while the AD group presented abnormal performance only for semantic fluency. Dividing the patients with dementia according to severity revealed a different pattern between AD and SVaD for the clinical dementia rating (CDR) stage of 0.5. The performance of the AD group declined gradually with CDR. However, the SVaD group performed very poorly in both tests even for very mild dementia (CDR stage of 0.5). The aMCI and svMCI groups exhibited similar performance patterns. Conclusions: The pattern of semantic and phonemic fluency was not clinically useful at the MCI stage, but it could be helpful in differentiating AD and SVaD in the early stage of dementia.

Population Biology of Korean Pomfret Pampus echinogaster (Basilewsky, 1855) (Perciformes: Stromateidae) on the Western Coast of Korea, Yellow Sea

오철웅,나종헌,김진구 한국통합생물학회 2009 Animal cells and systems Vol.13 No.1

Investigations were made on population biology of Pampus echinogaster (Basilewsky, 1855) in the coastal areas of Korea, Yellow Sea, between August 2005 and July 2006. Population structure was not significantly different between male and females. Monthly variation of gonadosomatic index (GSI) of both sexes defined spawning period extending from March through July. A similar pattern was also observed in change at maturity stages. For males and females GSI was positively correlated with hepatosomatic index (HSI). Fecundity, ranging from 41,250 to 103,610 eggs, was related to body size, indicating that body size is the useful determinant of fecundity. The sexual maturity (L50) was estimated as 14.98 cm TL for males and 19.32 cm TL for females. Parameters of growth estimated by the modified von Bertalanffy growth function model showed that the values of L∞ and K for combined data were 39.12 cm TL and 0.65 yr−1. The growth performance index of this study (2.75) was higher than that of the previous study (2.45). This difference could be attributed to sampling method. The recruitment patterns indicated one normally distributed group. Percentage of the recruitment was 51.04% in the spawning season and the highest in August (19.78%). Investigations were made on population biology of Pampus echinogaster (Basilewsky, 1855) in the coastal areas of Korea, Yellow Sea, between August 2005 and July 2006. Population structure was not significantly different between male and females. Monthly variation of gonadosomatic index (GSI) of both sexes defined spawning period extending from March through July. A similar pattern was also observed in change at maturity stages. For males and females GSI was positively correlated with hepatosomatic index (HSI). Fecundity, ranging from 41,250 to 103,610 eggs, was related to body size, indicating that body size is the useful determinant of fecundity. The sexual maturity (L50) was estimated as 14.98 cm TL for males and 19.32 cm TL for females. Parameters of growth estimated by the modified von Bertalanffy growth function model showed that the values of L∞ and K for combined data were 39.12 cm TL and 0.65 yr−1. The growth performance index of this study (2.75) was higher than that of the previous study (2.45). This difference could be attributed to sampling method. The recruitment patterns indicated one normally distributed group. Percentage of the recruitment was 51.04% in the spawning season and the highest in August (19.78%).

Variations in Species Composition, Biomass, and Density in Shrimp Trawl Bycatch Across Seasons and Tidal Phases in Southern Korean Waters: Developing a Fisheries Risk Management Approach

오철웅,김성태,나종헌 한국수산과학회 2009 Fisheries and Aquatic Sciences Vol.12 No.2

We quantitatively investigated compositions of fish and invertebrate bycatch in Korean shrimp fisheries. We sampled shrimp trawl bycatch from 48 commercial trawls over 1 year. These samples contained 108 taxa from 50 families, with 60 fish taxa contributing 51.2% of the total biomass and 48 invertebrate taxa 48.8%. However, 86.32% of the total individual organism density comprised invertebrates, while individual fishes made up the remainder. Within the bycatch, two fish species varied in population size structure by season, suggesting recruitment is seasonal in these taxa. Overall general catch characteristics (total bycatch biomass and organism density) varied significantly by season and tide, and a significant interaction effect was observed (season×tide) on total density, but not on total biomass. The data collected will be used in designing a program of long-term bycatch monitoring

울진 바다목장 생태계의 영양구조와 에너지 흐름

김형철,이재경,김미향,최병미,서인수,나종헌 해양환경안전학회 2018 해양환경안전학회지 Vol.24 No.6

본 연구는 울진 바다목장해역에 서식하는 생물을 대상으로 바다목장 관리를 위한 해양생태계의 영양구조와 에너지흐름을 파악하기 위한 목적으로 2013년 3월부터 10월까지 총 4회 현장조사를 실시하였다. 본 연구에서 개별 생물종들의 생태학적 특징에 따라 유사도에 근거한 비계량형다차원척도법을 사용하여 최고포식자, 바다새, 대형 및 소형유영어류, 볼락류, 가자미류, 저서어류, 반저서어류, 두족류, 저서섭이자, 표서동물, 이매패류, 전복, 자포동물, 동물플랑크톤, 부착성해조류, 미소해조류, 식물플랑크톤, 유기쇄설물 등 총 19가지로 생물그룹핑되었다. Ecopath 모델의 입력변수인 각 생물군들의 생체량, 생산량/생체량의 비, 섭식량/생체량의 비, 피식-포식관계 자료를 사용하여 울진 바다목장해역의 영양구조와 에너지 흐름을 추정하였다. 연구해역에서 각 생물군들의 영양단계는 1 ~ 5.687 범위로 파악되었다. 울진 바다목장 해역에 서식하는 모든 생물그룹들의 전체 소비량의 합은 229.7 t/㎞²/yr, 생물그룹들의 전체 이출량은 3,432.4 t/㎞²/yr이었다. 모든 생물그룹들의 총 에너지량은 6,796.2 t/㎞²/yr, 전체 생산량은 3,613.1 t/㎞²/yr로 추정되었다. 울진 바다목장 해역에서의 순 생태계 생산량은 3,490.3 t/㎞²/yr, 전체 생물군의 생체량은 167.3 t/㎞²/yr으로 추정되었다. This study conducted 10 sampling sites survey 4 times to determine the trophic structure and energy flow of marine ecosystems for Uljin marine ranching area, Korean East Sea from March to October 2013. Based on the ecological characteristics of biological species, one used the non-Metric Multidimensional Scaling method based on the similarity of species. A total of 19 classified species groups formed categories including, top predators, seabirds, large pelagic fishes, small pelagic fishes, rockfishes, pleuronectiformes, benthic fishes, semi-benthic fishes, cephalopods, benthic feeders, epifauna, bivalves, abalone, Cnidaria, zooplankton, benthic algae, microalgae, phytoplankton and detritus. The biomass, production/biomass, consumption/biomass, diet composition data of each species groups to input data used in Ecopath mode estimated the trophic structure and energy flow of marine ecosystems in the Uljin marine ranching area. One estimated each species groups on the trophic level from 1 to 5.687. The sum of all consumption was estimated at 229.7 t/㎞² /yr and the sum of all exports was as estimated 3,432.4 t/㎞²/yr. Total system throughput was at 6,796.2 t/㎞²/yr, and the sum of all production was estimated at 3,613.1 t/㎞²/yr. Net system production according to these results was estimated at 3,490.3 t/㎞²/yr and total biomass (excluding detritus) was estimated at 167.3 t/㎞²/yr in the Uljin marine ranching area.

낙동강 하구역에 서식하는 대형저서동물의 군집구조와 건강도

윤석현,이진우,오철웅,최병미,윤건탁,나종헌,서인수 한국해양과학기술원 2021 Ocean and Polar Research Vol.43 No.2

The community structure and health status of macrobenthos assemblages were investigated in the subtidal area of the Nakdong River estuary, Southern Coast of Korea. Benthic fauna samples were collected seasonally at 8 stations in the subtidal area of the Nakdong River estuary from February 2013 to October 2015. During the survey, a total of 380 species and 4,603 ind./m2 of macrobenthos in all sampling areas were collected. The major dominant species were the polychaetes Minuspio japonica, Pseudopolydora kempi, Heteromastus filifomis, Capitella capitata, the amphipod Grandidierella japonica and the bivalvia Arcuatula senhousia. Some species of polychaetes found in the study area consisted of opportunistic species that showed high densities when habitat condition was poor. On the other hand, macrobenthos assemblages in the study area were divided into brackish water and marine groups. Abundance was high in the brackish group, while the number of species and diversity index were high in the oceanic group. The three indices (AMBI, M-AMBI, and BHI) in the assessment of health levels based on the ecological characteristics and number of species in macrobenthic were commonly shown to be in good condition in the group of oceanic stations, while relatively poor conditions were reflected in the group of brackish stations. Compared to other indices, the M-AMBI index of the three indices for health assessment was considered to be a relatively more suitable one to assess benthic ecological conditions.

거제한산만에 서식하는 대형저서동물의 춘계와 하계의 군집구조 및 건강도 평가

정래홍,서인수,최병미,최민규,윤상필,박상률,나종헌,윤재성,Jung, Rae Hong,Seo, In-Soo,Choi, Byoung-Mi,Choi, Minkyu,Yoon, Sang-Pil,Park, Sang Rul,Na, Jong Hun,Yun, Jae Seong 해양환경안전학회 2016 해양환경안전학회지 Vol.22 No.1

본 연구는 거제한산만에 서식하는 대형저서동물의 군집구조와 건강도를 평가하는데 목적이 있다. 대형저서동물의 채집을 위한 현장조사는 2013년 5월(이하 춘계)과 8월(이하 하계)에 실시하였다. 거제한산만에서는 총 300종 $7.6m^{-2}$과 75,760개체(1,994개체 $m^{-2}$)의 대형저서동물이 출현하였고, 다모류가 110종과 49,955개체(1,315개체 $m^{-2}$)의 밀도를 나타내 가장 우점하는 생물이었다. 거제한산만의 주요 우점종은 다모류의 긴자락송곳갯지렁이(Lumbrineris longifolia, $299{\pm}164$개체 $m^{-2}$), Aphelochaeta monilaris($100{\pm}57$개체 $m^{-2}$), 이매패류의 종밋(Musculista senhousia, $91{\pm}96$개체 $m^{-2}$) 및 다모류의 꼬리대나무갯지렁이(Praxillella affinis, $80{\pm}696$개체 $m^{-2}$)등이었다. 출현 종과 개체수의 자료를 근거로 대형저서동물의 군집구조를 파악한 결과, 대형저서동물 군집은 크게 내만역(산달도 인근 양식어장) 정점군과 수로역(한산도에서 추봉도 해역) 정점군으로 대별되었다. 거제한산만의 건강도를 평가한 결과, 수로역의 정점군과 비교해 내만역에 위치한 산달도 인근 양식어장 정점군에서 환경질이 상대적으로 불량하였다. 또한 3개의 생물 평가지수(다양도 지수, M-AMBI 지수 및 환경보전도 지수)는 AMBI 지수와 비교해 상대적으로 효율적인 지수임을 알 수 있었다. This study was performed to investigate the community structure and health assessment of macrobenthic assemblages in Geoje-Hansan Bay, Southern Coast of Korea. Macrobenthos were collected by van Veen grab sampler at May (spring) and August (summer) 2013. The total species number and mean density were 300 species $7.6m^{-2}$ and $1,994ind.\;m^{-2}$, respectively. The major dominant species were the polychaetes Lumbrineris longifolia ($299{\pm}164ind.\;m^{-2}$), Aphelochaeta monilaris ($100{\pm}57ind.\;m^{-2}$), the bivalve Musculista senhousia ($91{\pm}96ind.\;m^{-2}$) and the polychaete Praxillella affinis ($80{\pm}66ind.\;m^{-2}$). From the community statistics [cluster analysis and nonmetric multidimentional scaling (NMDS) ordination], the macrobenthic community was distinguished into two groups of inner bay (farming ground of near Sandal Island) and channel station(from Hansan Island to Chubong Island) group. In this study, the ecological status was assessed by four biotic indices Shannon's H', the ATZI Marine Biotic Index (AMBI), multivariate-AMBI (M-AMBI) and the Environment Conservation Index (ECI). The ecological status of the macrobenthic community in Geoje-Hansan Bay were poorer in the inner bay station than in the channel station. The results of the present study showed that three biotic indices (Shannon's H', M-AMBI and ECI) were valid as an index for evaluating the ecological status than the AMBI.

가로림만에 서식하는 대형저서동물의 춘계와 하계의 군집구조 및 건강도 평가

정래홍,서인수,이원찬,김형철,김정배,최병미,윤재성,나종헌,Jung, Rae-Hong,Seo, In-Soo,Lee, Won-Chan,Kim, Hyung-Chul,Kim, Jeong-Bae,Choi, Byoung-Mi,Yun, Jae-Seong,Na, Jong-Hun 해양환경안전학회 2014 해양환경안전학회지 Vol.20 No.5

본 연구는 가로림만에 서식하는 대형저서동물의 군집구조와 건강도를 평가하는데 목적이 있다. 대형저서동물의 채집을 위한 현장조사는 2012년 5월(이하 춘계)와 7월(이하 하계)에 실시하였다. 가로림만에서는 총 247종 $4.4m^{-2}$과 35,745개체(1,625개체 $m^{-2}$)의 대형저서동물이 출현하였고, 다모류가 120종과 27,310개체(1,241개체 $m^{-2}$)의 밀도를 나타내 가장 우점하는 생물이었다. 가로림만의 주요 우점종은 다모류의 작은사슴갯지렁이(Ampharete arctica), 긴자락송곳갯지렁이(Lumbrineris longifolia), Mediomastus californiensis 및 Euclymene oerstedi등이었다. 출현 종과 개체수의 자료를 근거로 대형저서동물의 군집구조를 파악한 결과, 대형저서동물 군집은 크게 3개로 구별되었고, 조립질 퇴적물(그룹 1과 2)과 혼합 및 세립질 퇴적물(그룹 3)이 우세한 정점군으로 나뉘었다. 가로림만의 건강도를 평가한 결과, BPI지수는 춘계와 하계에 공통적으로 가장 양호한 상태(high status; normal)를 나타낸 반면, AMBI지수는 양호한 상태(good status; slightly polluted)를 반영하고 있었다. 따라서 가로림만의 건강도는 양호한 상태를 나타내는 것으로 판단할 수 있었다. This study was performed to investigate the community structure and health assessment of macrobenthic assemblages in Garorim Bay, West Coast of Korea. Macrobenthos were collected by van Veen grab sampler at May(spring) and July(summer) 2012. A total of 247 species occurred and mean density was $1,625\;ind.\;m^{-2}$, both of which were dominated by annelid polychaetes(120 species and $1,241m^{-2}$). Dominant species were the polychaetes Ampharete arctica, Lumbrineris longifolia, Mediomastus californiensis and Euclymene oerstedi, with a density of 445(${\pm}1,837\;ind.\;m^{-2}$), 103(${\pm}148\;ind.\;m^{-2}$), 55(${\pm}83\;ind.\;m^{-2}$) and 50(${\pm}104\;ind.\;m^{-2}$), respectively. The study area was divided into 3 station group based on the cluster analysis and nMDS ordination. These assemblage were : 1)the group 1 and 2 were associated with coarse sediment dominated stations and 2)the group 3 was connected with a mixed and fine sediment dominated stations group. The BPI and AMBI index were applied to assess the benthic ecological status. The ecological status of the Garorim Bay was "good status(slightly polluted)" to "high status(normal)" at most sampling stations during spring and summer. In conclusion, the two marine biotic index calculated shown that the Garorim Bay had a good ecological status.