시간스케일에 따른 해양표면수온과 기온의 변동 및 상관연구

장이현,강용균,서영상 한국환경과학회 2000 한국환경과학회지 Vol.9 No.4

The relationship between air temperature and sea surface temperature are studied using the daily air temperature and sea surface temperature data for 25 years (1970∼1994) at 9 coastal stations in Korea. Seasonal variations of air temperature have larger amplitudes than those of sea surface temperature. The seasonal variations of air temperature leads those of sea surface temperature by 2 to 3 weeks. The anomalies of sea surface temperature and air temperature are positively correlated. The long term anomalies of sea surface temperature and air temperature with time scales more than 1 month are more highly correlated than those of short term, with time scales less than 1 month. Accumulated monthly anomalies of sea surface temperature and air temperature for 6 months showed higher correlation than the anomalies of each month. The magnitudes of sea surface temperature and air temperature anomalies are related with the duration of anomalies. Their magnitudes are large when the durations of anomalies are long.

가스분무한 금속 액적의 3차원 응고조직 예측

장이현,이경이,홍준표 대한금속재료학회 1996 대한금속재료학회 학술대회 개요집 Vol.1996 No.0

Detection of Low Salinity Water in the Northern East China Sea During Summer using Ocean Color Remote Sensing

장이현,이나경,서영상 대한원격탐사학회 2004 大韓遠隔探査學會誌 Vol.20 No.3

Hemodynamic Alteration of the Cervical Venous Circulation in a Patient Suffering From Atlantoaxial Degenerative Osteoarthritis with Subluxation: A Case Report

이현,이상호,최원규,장의성,이상진,황병욱 대한영상의학회 2010 대한영상의학회지 Vol.62 No.1

A 52-year-old female patient was admitted to our hospital with severe occipitocervical pain. The radiographic examination revealed degenerative osteoarthritis and subluxation of the right atlantoaxial joint. Her pain was completely and immediately relieved after occipitocervical reduction and fusion. The marked dilatation of the extradural venous plexus around the vertebral artery and the enlarged deep cervical veins seen on the preoperative MR images had returned to normal dimensions on the postoperative MR images, and this explained the observed rapid pain relief. We report here on this case together with a review of the relevant literature.

임진강대 문산지역의 구조기하, 키네마틱스 및 미세구조 연구

이현서,장이랑,권상훈,Lee, Hyunseo,Jang, Yirang,Kwon, Sanghoon 대한자원환경지질학회 2021 자원환경지질 Vol.54 No.2

한반도 중서부에 위치한 임진강대는, 페름기-트라이아스기에 북중국판과 남중국판이 충돌하여 형성된 친링-다비-술루 대륙충돌대와 지구조적으로 대비되고 있는 지역으로, 지각규모의 전단대, 트러스트 및 습곡 등의 충돌조산운동 관련 지질구조들이 보존되어 있는 것으로 알려져 왔다. 본 연구는 경기육괴와 접하는 임진강대의 남쪽 경계지역인 문산지역에서 수행한 구조지질 연구결과를 종합하고, 이를 바탕으로 기존에 이 지역에서 일부 연구자들에 의해 대륙충돌로 형성된 조산대 후기 붕괴 단계에 형성된 것으로 제안되었던 지각규모 신장성 경기전단대의 존재와 변형 특성에 관해 검토하고자 하였다. 이를 위해, 야외조사를 통해 획득한 지질요소 자료를 바탕으로 문산지역의 구조기하학적 형태를 해석하였고, 노두 및 박편 상에서 확인한 전단감각 지시자로부터 암석 이동과 관련된 키네마틱스를 해석하였다. 이 지역의 가장 주된 지질구조는 동북동-서남서 주향의 광역규모 임진강단층의 상반 및 하반에 발달한 대략 남-북 주향의 힌지를 가지는 지질도규모의 습곡이다. 이 습곡에 대한 키네마틱스 해석 결과는 전단감각들이 습곡의 힌지를 중심으로 양쪽 익부에서 서로 반대 방향으로 대략 동쪽 내지 서쪽을 향함을 지시한다. 또한 문산지역 흑운모편마암과 변성섬장암의 광물 미세변형구조 관찰 결과로부터 유추한 암석의 변형조건은 전형적인 석영-장석질 암석들의 중부지각 소성변형조건에 해당한다. 따라서 본 연구를 통해 획득한 문산지역의 구조기하, 키네마틱스 및 미세구조 분석결과는 이 지역에 발달한 전단대가 기존 연구들에서 제안된 대륙충돌 후기에 형성된 지각규모의 신장성 경기전단대보다는, 요굴습곡작용에 의한 지질도규모 습곡의 발달과 관련된 전단운동의 결과일 가능성이 높은 것으로 제안한다. 이와 같은 임진강대 내 대륙충돌의 증거들에 대한 상세한 구조지질학적 검증은 향후 한반도 충돌조산운동에 있어 임진강대의 지구조적 역할에 대한 난제들을 해결하는데 중요한 정보를 제공할 수 있을 것으로 기대된다. The Imjingang Belt in the middle-western Korean Peninsula has tectonically been correlated with the Permo-Triassic Qinling-Dabie-Sulu collisional belt between the North and South China cratons in terms of collisional tectonics. Within the belt, crustal-scale extensional ductile shear zones that were interpreted to be formed during collapsing stage with thrusts and folds were reported as evidence of collisional events by previous studies. In this study, we tried to understand the nature of deformation along the southern boundary of the belt in the Munsan area based on the interpretations of recently conducted structural analyses. To figure out the realistic geometry of the study area, the down-plunge projection was carried out based on the geometric relationships between structural elements from the detailed field investigation. We also conducted kinematic interpretations based on the observed shear sense indicators from the outcrops and the oriented thin-sections made from the mylonite samples. The prominent structures of the Munsan area are the regional-scale ENE-WSW striking thrust and the N-S trending map-scale folds, both in its hanging wall and footwall areas. Shear sense indicators suggest both eastward and westward vergence, showing opposite directions on each limb of the map-scale folds in the Munsan area. In addition, observed deformed microstructures from the biotite gneiss and the metasyenite of the Munsan area suggest that their deformation conditions are corresponding to the typical mid-crustal plastic deformation of the quartzofeldspathic metamorphic rocks. These microstructural results combined with the macro-scale structural interpretations suggest that the shear zones preserved in the Munsan area is mostly related to the development of the N-S trending map-scale folds that might be formed by flexural folding rather than the previously reported E-W trending crustal-scale extensional ductile shear zone by Permo-Triassic collision. These detailed examinations of the structures preserved in the Imjingang Belt can further contribute to solving the tectonic enigma of the Korean collisional orogen.

고지방식이와 STZ 유도 제2형 당뇨 마우스에서 새싹의 항당뇨 효과

이현서(Hyun-Seo Lee),강현주(Hyun Ju Kang),전인화(In Hwa Jeon),염정호(Jung Ho Youm),장선일(Seon Il Jang) 한국식품영양과학회 2014 한국식품영양과학회지 Vol.43 No.11

본 연구에서는 고지방식이와 streptozotocin으로 유도된 제2형 당뇨 마우스에서 새싹추출물의 항당뇨 효과를 살펴보았다. 제2형 당뇨 유도 후 4주 동안의 체중 변화를 관찰한 결과 새싹추출물군과 메트포민군에서 유의한 체중 감소 변화가 나타났으며, 식이섭취량에 따른 변화는 모든 실험군 간의 차이가 없었다. 공복혈당은 고지방식이군의 경우 실험종료일까지 지속적으로 상승하였고, 이와 대조적으로 새싹추출물과 메트포민군의 경우 실험 2주째부터 감소하여 실험 종료 4주째에서는 고지방식이군보다 유의적으로 감소하였다. 경구 내당능 검사는 포도당 섭취 후 60분, 90분, 120분에서 새싹추출물과 메트포민군이 고지방식이군보다 유의적으로 감소하였으며, 인슐린 내성 검사는 120분에서 새싹추출물과 메트포민군이 고지방식이군보다 유의성 있게 감소하였다. 혈중 지질 농도 변화에서 총콜레스테롤, 중성지방 그리고 LDL 콜레스테롤 농도는 고지방식이군에 비해 새싹추출물과 메트포민군에서 유의적으로 감소하였고, HDL 콜레스테롤 농도는 고지방식이군에 비해 새싹추출물과 메트포민군에서 증가하였다. 간독성의 지표인 glutamate oxaloacetate transaminase와 glutamate pyruvate transaminase 효소 활성도는 메트포민투여군과 고지방식이군을 제외한 실험군들 간에 유의성이 나타나지 않았다. 혈중 인슐린과 렙틴 농도는 고지방식이군에 비해 새싹추출물과 메트포민군에서 유의적으로 감소하였다. 이상의 결과를 바탕으로 새싹추출물은 제2형 당뇨 마우스에서 체중을 감소시키고 혈중지질 대사 이상을 조절하면서 인슐린 저항성을 감소시켜 혈당을 개선하므로 항당뇨 효과가 있는 우수한 식품 소재로서의 개발 가능성을 시사하고 있다. Sprout vegetables containing various types of polyphenols and flavonoids, are known to have anti-inflammatory, antioxidant, cholesterol-lowering, and anti-obesity activities. However, there have been few reports on the anti-diabetic efficacy of sprout vegetables. Here, we investigated the anti-diabetic effects of sprout extract obtained from buckwheat, beet, rape, broccoli, kohlrabi, red young radish, and dachai, in high fat diet (HFD) and streptozotocin (STZ)-induced type Ⅱ diabetes mellitus mice. The mice were fed a HFD (60% calories as fat) for 8 weeks prior to intraperitoneal injection with STZ (75 mg/kg). The diabetic mice were divided into four groups: standard diet (STD, 10% calories fat), HFD, HFD with sprout extract (SPE) and HFD with metformin (MET). After 4 weeks, body weight gain was much lower in both SPE and MET groups than in HFD group. In contrast, there was no difference experiment groups regarding food intake ratio. The level of fasting blood glucose was significantly lower in the SPE and MET groups compared to the HFD group. Oral glucose tolerance and insulin tolerance in the SPE and MET groups were significantly ameliorated in comparison to the HFD group. The concentrations of serum total cholesterol, triglycerides, and LDL cholesterol in the SPE and MET groups were remarkably reduced in comparison to the HFD group, and HDL cholesterol concentration was higher in the SPE and MET groups than in the HFD group. Glutamate oxaloacetate transaminase and glutamate pyruvate transaminase levels were between SPE and HFD groups. The serum insulin and leptin concentrations were significantly reduced in both the SPE and MET groups compared to the HFD group. Therefore, these results indicate that sprout extract could improve insulin resistance and attenuate blood glucose level in HFD/STZ-induced type Ⅱ diabetes mellitus mice. We conclude that this study may provide positive insights into sprout extract as a functional food ingredient for treatment of type Ⅱ diabetes mellitus.

개에 발생한 간내 담관상피암의 진단예

이현범,장인호,장종식 한국임상수의학회 1997 한국임상수의학회지 Vol.14 No.1

A 5-years-old female pointer dog was submittedto the hospital with the disease history of gradual distension of abdomen and emaciation for two months. An applesized hard mass was palpated on the right costal arch on physical examination. On blood chemical analysis, the marked elevation of SALT and decrease in serum albumin were detected. On paracentesis, a large volume of blood tinged fluid was detected. The peritoneal fluid contained tumor cells and the numerous blood cells. At autopsy the tumor mass located in the left medial lobe of liver was whitish and firm, and was consisted of many cysts. Histologically the tumor was identified as typical cholangiocellular carcinoma. Metastatic lesions of the tumor were detected in the lung, stomach, spleen, diaphragm, and lymph glands. This observation indicates that the cytological examination of the abdominal fluid have a diagnostic significance in the clinical examination of patients with abdominal tumors.

제1위내용액 이식에 의한 비육우의 농후사료 적응법에 관한 연구

이현범,탁연빈,성은주,김기석,이영주,정재석,장종식,권오덕 한국임상수의학회 1998 한국임상수의학회지 Vol.15 No.1

In feedlot cattle the abrupt change of diet from roughage to a large quantity of grain for the purpose to improve production often results in increased occurrence of rumen acidosis or acute carbohydrate encouragement enterotoxemia, bloats diarrhea liver abscess and laminitis or robot disease. The common management practice to control these problem is to increase the amount of concentrates in the diet in a stepwise manner until the animals are adapted to a high-grain ration. However this practice requires at least about 3 weeks adaptation period and specially prepared adaptation rations which contain various amount of concentrates. Present experiment was undertaken in order to findout the more simple and rapid adaptation method of cattle to a high grain ration. Nineteen Korean calves aging from four to six month were fed artifical hay (Youngchoun Chuk-Hyup, Korea) which contains 10% of concentrates or alfalfa and rye grass hays for two months and randomly alloted to three experimental groups and two control groups. The experimental group-1 was inoculated by stomach tube for two days with li500 ml/day of ruminal fluid fished from Korean beef cattle that had been previously adapted to a high-energy ration. The experimental group-2 was inoculated by trocalization for two days with the same ruminal fluid. The experimental group-3 was inoculated by trocalization with 1,500 ml/day of bacterial culture which contained 2$\times $10$^{9}$/m1 of Gram-negative bacteria derived from adapted luminal fluid. The two control groups were treated with normal saline solution by the same methods. All animals were fed high-energy ration that contained 80% of grain ad libitum for 30-74 days beginning on the third of the treatment. The effect of the inoculation on the adaptation was observed clinicopathologically with the following results; All of the experimental calves inoculated with the ruminal fluid or Gram-negative bacterial culture derived from adapted cattle did not show any signs of rumen acidosis or other related diseases, while most of the control calves did show diarrhea and bloat and a calf laminitis. The average daily weight gain and feed efficiency of experimental calves were slightly improved compared with control calves. Following the feeding of high-grain rational the pH of the ruminal fluid was lowered in both the experimental and control groups. However severe acidosis with the pH of below 5.0 was observed in only a control group-2. The protozoal number in ruminal fluid was markedly decreased during the high-grain feeding in both the experimental and control calves. However the decrease was mere severe in control calves compared with the experimental calves. The activation of the protozoa were completely disappeared within nine hours at the refrigerator temperature (4"C). No significant differences in heamatological and blood chemical values between the experimental and control calves were recognized. However in one control calf which showed clinically laminitis marked elevations of serum glutamic oxaloacetate transaminase and lactic dehydrogenase activities and a decrease of serum glucose level were observed. From these results it would be concluded the intraruminal transplantation of unadapted calves with the adapted ruminal fluid from cattle previously adapted to a high-energy ration prevents disease problem associated with high-grain feeding and improve weight gain and feed efficiency.ency.

산 처리 골재가 시멘트 모르타르의 압축강도에 미치는 영향

시이현 ( Shi Yixuan ),장인동 ( Jang Indong ),이종구 ( Yi Chongku ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2

This study is aimed at comparing the effect of cement mortar made of sulfuric acid treated ISO standard sand with that of cement mortar made of normal ISO standard sand. In the water absorption test, water absorption of standard sand increases with the increase of immersion time in sulfuric acid solution. The results show that at the water cement ratio of 0.5, the longer the standard sand is immersed in sulfuric acid, the greater the compressive strength of the cement mortar sample.

도살견의 체조직내 카드뮴 함량에 관한 조사 연구

장종식,이현범,이근우,Jang Jong-Sik,Lee Huyn-Beom,Lee Keun-Woo 대한수의사회 1993 대한수의사회지 Vol.29 No.3

In order to clarify the cadmium contents of normal dogs, tissue samples including liver, kidney, muscle, skin and hair were collected from 50 dogs which were slaughtered in Dae Gu area. All samples were dry ashed and analyzed for cadmium content by atomic