http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
좌심실보조장치의 출구 캐뉼라의 삽관 위치에 따른 대동맥궁 내부의 혈류 수치해석
지인혁(In Hyeog Jee),임기무(Ki Moo Lim) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
Outflow cannulation site of left ventricular assist device (LVAD) chosen by considering anatomical structure of thoracic cavity and vascular system. Though outflow cannulation site influences blood perfusion at each branch, there is no standard rule or quantitative data. In this study, we computed the amount of blood perfusion at each arterial branch numerically according to outflow cannulation sites (ascending aorta, aortic arch, descending aorta). We generated computational meshes to the three-dimensionally reconstructed arterial system. Clinically measured arterial pressure were used for inlet boundary condition, porous media were applied to mimic blood flow resistance. Blood perfusion through left common carotid artery was 2.5 times higher than other cases, and that through right common carotid artery was 1.1 times higher than other branches. Although this is simulation study, will be useful reference data for the clinical study of LVAD which considers blood perfusion efficiency.
좌심실보조장치의 출구 캐뉼라의 삽관 위치에 따른 혈액관류에 대한 시뮬레이션 연구
지인혁,김형균,임기무,Jee, In Hyeog,Kim, Hyeong Gyun,Lim, Ki Moo 대한의용생체공학회 2015 의공학회지 Vol.36 No.4
Outflow cannulation site of left ventricular assist device(LVAD) chosen by considering anatomical structure of thoracic cavity and vascular system. Though outflow cannulation site influences blood perfusion at each branch, there is no standard rule or quantitative data. In this study, we computed the amount of blood perfusion at each arterial branch numerically according to outflow cannulation sites(ascending aorta, aortic arch, descending aorta). We generated computational meshes to the three-dimensionally reconstructed arterial system. Clinically measured arterial pressure were used for inlet boundary condition, porous media were applied to mimic blood flow resistance. Blood perfusion through left common carotid artery was 2.5 times higher than other cases, and that through right common carotid artery was 1.1 times higher than other branches. Although this is simulation study, will be useful reference data for the clinical study of LVAD which considers blood perfusion efficiency.
탈수흰쥐에서 심방특수과립의 분비에 관한 전자현미경자기방사법적 연구
신해영(Hae-Young Shin),송창호(Chang Ho Song),김형태(Hyoung-Tae Kim),한의혁(Eui-Hyeog Han),임재원(Jae-Won Lim),이무삼(Moo Sam Lee) 대한해부학회 2004 Anatomy & Cell Biology Vol.37 No.3
이 연구는 탈수가 ANP의 합성과 분비 그리고 분비과정에 미칠 수 있는 영향을 전자현미경자기방사법을 이용하여 알아봄 으로써 심방의 내분비기능을 좀더 잘 이해하고자 시도되었다. 체중 50 g 정도의 Sprague-Dawley 계 수컷흰쥐를 대조군과 탈수 1일, 3일군으로 나누고, 각 실험군을 L-leucine3H 주입 후조직을 채취할 때까지 시간인 20분, 60분, 240분으로 다시 나누었다. 채취한 조직을 전자현미경 시료제작 과정을 거쳐 Epon 812에 포매한 다음 초박절편한 조직을 전자현미경자기방사법 과정을 거쳐 전자현미경으로 관찰하였다. 전자현미경관찰 결과 : 탈수동물의 심방특수과립 (ANP 함유과립)은 정상동물에서와 달리 크기가 다양하고 과립바탕질의 전자밀도가 낮았으며 윤곽이 뚜렷하지 않은 과립도 관찰되었다. 전자현미경자기방사법 결과 : 심방조직으로 들어간 L-leucine3H의 위치를 나타내는 은입자는 굽은 실 또는 실토리 모양으로 보였다. 이 은입자는 심방특수과립을 포함한 세포포함물과 세포소기관, 세포사이공간, 혈관에서 관찰되었다. 대조군에서는 L-leucine3H를 주입하고 20분 후에 골지장치의 방사능치가 높았고, 과립세포질세망과 심방특수과립의 방사 능치는 60분에 높았다. 그리고 세포막과 혈관의 방사능치는 240분 후에 높게 나타났다. 탈수 1일군과 3일군에서는 골지장치와 심방특수과립, 세포막, 세포사이공간의 방사능치는 20분 후에 높았고, 과립세포질세망과 혈관은 60분에 높게 나타났다. 심방특수과립의 동태 : 심방특수과립의 양은 대조군에 비해 탈수 1일군에서는 34.1%, 탈수 3일군에서는 27.4% 증가하였다. 또한 탈수 3일군에서 새로 합성된 심방특수과립의 양은 동위원소 주입 후 20분에 전체 심방특수과립의 85.02%이고, 60분에는 36.87%, 240분에는 20.45%로 급격하게 감소하였다. 이상의 결과로 탈수동물에서 심방근육세포 속에서는 ANP 합성이 매우 활발하게 일어나고 새로 합성된 ANP의 분비도 활 발하지만, 탈수 동안 심방내강으로 분비되는 ANP의 양이 줄어들고 세포사이에 축적되고 머무는 양과 시간이 증가한다는 것을 알 수 있었다. This study was performed to investigate for the effect of dehydration on the synthesis, secretion and secreted pathway of atrial specific granules contained ANP by electron microscopic autoradiography. Male Sprague-Dawley rats, body weigh of about 50 g (range 47 to 53 g), were divided into control, 1 day dehydration and 3 days dehydration groups. Each group was divided into four groups according to sacrificed time on 20 min, 60 min and 240 min after the injection of L-leucine3H. Tissues of the right atrium obtained from animals were processed for typical electron microscopic procedure, and then embedded in Epon 812. Ultrathin sections were followed for electron microscopic autoradiographic method. Atrial specific granules were various in size, and some granules had a lower electron densities and indistinct granular membrane in the dehydration groups compared with the control group. In the electron microscopic autoradiographs of atrial wall, silver grains indicated by means of the positions of labelled L-leucine3H over the cell inclusion included atrial specific granules, cell organelles, intercellular spaces and blood vesseles. In the control group, high specific radioactivity was observed in the Golgi apparatus at 20 min, and in the rough endoplasmic reticulums and atrial specific granules at 60 min after the injection of L-leucine3H. And high level of radioactivities were observed in the cell membranes and blood vesseles at 240 min after the injection of L-leucine3H. In the 1 day and 3 days dehydration groups, radioactivities of Golgi apparatus, atrial specific granules, cell membranes and intercellular spaces were high level at 20 min, and radioactivities of rough endoplasmic reticulums and blood vesseles were high level at 60 min after isotope injection. Stored atrial specific granules were increased to 34.1% in the 1 day dehydration group, 27.4% in the 3 days dehydration group compared with the control group. In the 3 days dehydration group, newly formed granules increased 85.02% at 20 min, but those decreased rapidly to 36.87% at 60 min, 20.45% at 240 min after the injection of Lleucine3H in atrial cardiocytes. This results suggest that total ANP increased rapidly in the atrial cardiocytes, and newly formed ANP secreted rapidly into the intercellular space in the condition of dehydration, and ANP from atrial cardiocytes remain in intercellular space for dehydration period.
HPLC-UVD/MS를 이용한 농산물 중 fenoxycarb, pyriproxyfen 및 methoprene의 분석법 확립
이수진(Su-Jin Lee),김영학(Young-Hak Kim),송이슬(Lee-Seul Song),황영선(Young-Sun Hwang),임정대(Jung-Dae Lim),손은화(Eun-Hwan Sohn),임무혁(Moo Hyeog Im),도정아(Jung-Ah Do),오재호(Jae-Ho Oh),권기성(Kisung Kwon),이중근(Joong-Keun Lee),이영 한국농약과학회 2011 농약과학회지 Vol.15 No.3
Fenoxycarb, pyriproxyfen and methoprene are juvenile hormone mimic insecticide, These insecticides have been widely used for mosquito, fly, scale insects, and Lepidoptera. The purpose of this study was to develop a simultaneous determination procedure of fenoxycarb, pyriproxyfen and methoprene residues in crops using HPLC-UVD/MS. These insecticide residues were extracted with acetone from representative samples of four raw products which comprised brown rice, apple, green pepper, and Chinese cabbage. The extract was diluted with saline water, and then n-hexane/dichloromethane partition was followed to recover these insecticides from the aqueous phase. Florisil column chromatography was additionally employed for final clean up of the extract. The analytes were quantitated by HPLC-UVD/MS, using a C₁? column. The crops were fortified with each insecticide at 3 levels per crop. Mean recovery ratios were ranged from 80.0 to 104.3% in four representative agricultural commodities. The coefficients of variation were less than 4.8%. Quantitative limit of fenoxycarb, pyriproxyfen, and methoprene was 0.04 ㎎/㎏ in crop samples. A HPLC-UVD/MS with selected-ion monitoring was also provided to confirm the suspected residues. The proposed simultaneous analysis method was reproducible and sensitive enough to determine the residues of fenoxycarb, pyriproxyfen and methoprene in the agricultural commodities.