흰쥐에서 탄수화물 종류가 운동시 당 및 지질대사에 미치는 영향

권태동,전중기,민경선,김형렬,장응찬 대구대학교 기초과학연구소 1998 基礎科學硏究 Vol.15 No.2

The purpose of this study was to investigate the effects of glucose, sucrose, and glucose polymer(GP) ingestion on the carbohydrate and lipid metabolism during treadmill running in rats. Rats were randomly assigned to normal, control and carbohydrate groups. Carbohydrate group was divided into glucose, sucrose and GP ingested rats. The experiment was carried out after overnight fasting. Rats were administrated either normal saline(control) or carbohydrates solutions of formulated glucose(6%), sucrose(6%) and GP(6%) via polyethlene tube to stomach before treadmill run. Exercise was loaded by a treadmill run at the speed of 1 km/hour for 30, 60 and 120 minutes. The results of experiment were as follows: Plasma glucose levels were decreased in proportion to the exercise time in control, but increased at treadmill run 30 minutes and then gradually decreased with the lapse of the exercise time in carbohydrates compared with normal rats. It decreased in control, glucose, sucrose and GP compared with normal rats in decreasing order at treadmill run 120 minutes(% change of plasma glucose level of control, glucose, sucrose and GP compared with normal rats were 67, 74, 87 and 91 in plasma glucose level at treadmill run 120 min., respectively). Plasma lactate levels were increased by the exercise loading compared with normal in control and carbohydrates ingested rats. It increased in control, sucrose and GP in increasing order compared with normal rats, at treadmill run 120 minutes(% change of plasma lactate level of control, glucose, sucrose and GP compared with normal rats were 167, 185, 149 and 114 in plasma lactate level at treadmill run 120 min., respectively). Plasma FFA levels had tendency to increase by the exercise loading compared with normal in control and carbohydrates ingested rats. It showed increase in the sucrose, glucose, GP and control rats in Increasing order compared with normal rats at treadmill run 120 minutes(% change of plasma FFA level of control, glucose, sucrose and GP compared with normal rats were 151, 153, 166 and 152 in plasma FFA level at treadmill run 120 min., respectively). Plasma acetoacetate levels were higher in control compared with carbohydrates ingested rats at treadmill run 30, 60 and 120 minutes. Plasma beta-hydroxybutyrate levels increased by exercise compared with normal rats in control and carbohydrates ingested rats at treadmill run 30, 60, 120 minutes. Plasma insulin levels were decreased in proportion to the exercise time in control compared with normal rats, but in carbohydrates ingested rats increased at treadmill run 30 minutes and then gradually deceased with the lapse of the exercise time compared with normal. In carbohydrates ingested rats, plasma insulin levies were higher than control. Hematocrit did not show any difference between control and carbohydrates rats at treadmill run 30, 60 and 120 minutes. From these experimental results, it is suggested that the exhaustion of skeletal muscle glycogen, the hypoglycemia, the overproduction of lactate and dehydration is delayed in carbohydrates ingested rats. GP of the carbohydrates is considered as the most effective for these effects. Therefore, intake of carbohydrates before exercise, especially GP seems to increase performance in the prolonged moderate exercise.

간헐식 흐름방식을 활용한 수직 · 수평 습지의 정화효율 평가

주광진(Kwang Jin Joo),이동민(Dong Min Lee),김기중(Ki Jung Kim),조용철(Yong Chul Cho),장광현(Gwang Hyeon Jang),최이송(I Song Choi),오종민(Jong Min Oh) 응용생태공학회 2017 Ecology and resilient infrastructure Vol.4 No.3

본 연구에서는 부영양화의 원인이 되는 질소와 인의 제거 효율을 향상시킬 목적으로 광물질을 활용한 여재를 이용하여 호기, 혐기의 흐름조건을 만들어주기 위한 수직·수평 흐름 인공습지를 고안하여 아크릴 반응조로 제작한 후 성능평가를 진행하였다. 수직·수평 흐름형 인공습지의 경우 호기 및 혐기조건을 평가하기 위해서 반응조 내 용존산소(DO) 농도를 측정해본 결과 호기상태에서는 2.7 ㎎/L, 혐기상태에서는 N.D로 확인되어 목적에 부합된 결과가 확인되었다. 실험결과에서는 SS 저감효과가 140 min, 80 min, 60 min의 운전시간에서 각각 94%, 91%, 61%의 효율을 보였고, T-P의 경우 각각의 운전시간에 따라 84%, 71%, 63%의 저감효율을 보였다. 또한 T-N의 경우 각각의 운전시간에 따라 63%, 49%, 42%의 저감효율을 보여 기존의 습지가 12~24 hr 체류시간을 가지는 것에 비하여 짧은 운전시간에도 높은 처리효율을 보이는 것으로 확인되었다. 본 연구에서는 수직·수평 흐름 방식을 복합 적용하여 기존 인공습지의 단점을 보완하기 위해 기술개발을 진행한 것으로 어떠한 기능적 효과를 갖는지 확인하였고, 향후 이에 대한 현장적용을 위한 운영 및 관리적 차원의 메커니즘 연구가 추가로 진행 될 필요가 있다. Nitrogen and phosphorus are key factors in causing eutrophication of water body. In this study, ceramics media was selected to increase the removal efficiency of nitrogen and phosphorus. We designed vertical, horizontal flow constructed wetlands to create aerobic and anaerobic flow conditions by using the media, then proceeded to performance evaluations after acrylic reactors were produced. In the case of vertical and horizontal flow constructed wetlands, we measured oxygen concentrations to evaluate aerobic and anaerobic conditions. we got the result of 2.7 ㎎/L in the aerobic condition, N.D in the anaerobic condition respectively, which suited our purpose. The result of the combined vertical and horizontal flow condition showed that the removal efficiency of SS was 94%, 91%, 61% at 140 min, 80 min, 60 min of running times, respectively, and the removal efficiency of T-P was 84%, 71%, 63% during each running time. In case of T-N, the removal efficiency was 63%, 49%, 42% during each running time. We found that the reactor exerted better removal efficiency when in the short time compared to 12 - 24 hr residence time of existing wetlands. In this study, we conducted experiments to explore functional effects after applying combined vertical and horizontal flow methods in the field. Further study will be carried out to identify its mechanism and administrative perspective.

18세기 초 강원도 울진현령 오적의 마애비와 덕구온천 - 현령 오적 마애비 발견보고를 겸하여 -

심현용 ( Shim¸ Hyun-yong ),장기영 ( Jang¸ Ki-young ),정민호 ( Jeong¸ Min-ho ) 경북대학교 영남문화연구원 2021 嶺南學 Vol.0 No.76

18세기 초 강원도 울진현령 오적의 마애비가 2019년 4월 13일 장기영과 진호 부자에 의해 울진 응봉산 내 덕구온천 원탕에서 발견되었다. 이 글은 덕구온천 원탕에서 발견된 오적 마애비의 발견 경위를 소개하고 명문 판독을 시도하여 덕구온천의 역사와 유래를 살펴본 것이다. 발견된 마애비는 오적이 울진현령으로 있을 때 조여용과 함께 1716년 8월 하순 병을 치료하기 위해 덕구온천 원탕까지 등산하여 온천욕한 것을 기념하여 새긴 것이다. 전설에 의하면 덕구온천은 고려 말∼조선 초에 온천으로서의 역할을 하고 있는데, 이는 검토결과 문헌사료와 일치함을 보여준다. 또 덕구온천의 유래는 다섯 가지로 다양하게 나타나며, 우리나라 온천의 일반전인 발견 사례와 마찬가지로 사슴, 멧돼지 또는 노루를 사냥하다 발견하였다는 동물의 발견에서 덕구온천도 시작됨을 알 수 있었다. 이번에 발견된 1716년의 울진현령 오적 마애비는 울진 덕구온천의 유구한 역사를 증명하는 귀중한 사료로 그동안의 문헌기록을 입증해주는 중요한 금석문이라 하겠다. The Rock-carved Monument for Oh Jeok, a former Governor of Uljin-hyeon, Gangwon-do in the early 18th Century, was discovered by Jang Ki-young and his son, Jang Jin-ho, in 2019 at Eungbongsan Mountain in Uljin-gun. The Rock-carved Monument was carved in commemoration of Oh Jeok climbing up Eungbongsan Mountain and bathing in the Weontang pool at Deokgu Hot Spring in late-August 1716 with Jo Yeo-yong to treat his illness while serving as Governor. According to legend, the Deokgu was a popular hot spring between the late-Goryeo Dynasty and early-Joseon Dynasty, which is also consistent with historical records. Deokgu Hot Spring also has five origin stories. Some of its origin stories refer to a hunter discovering the hot spring while hunting for wild game such as deer, wild boar or roe deer, which was a typical way our ancestors discovered hot springs.

Parapharyngeal Space에 발생한 Pleomorphic Adenoma의 치험례

장신남,백민주,김진수,변기정 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.2

본 교실에서는 발생이 드문 부인두간극에 발생한 다형성 선종을 악하절개와 하악지 부위의 하악골 절단을 행한 이후에 둔적박리(blunt dissection)를 이용하여 종물과 주위의 구조물을 외과적으로 절제하였으며, 3년간의 추적 조사 결과 재발의 양상 없이 양호한 결과를 얻었기에 문헌고찰과 함께 보고하는 바이다. Pleomorphic adenoma is the most common of the benign salivary gland tumors. Pleomorphic adenoma accounts for 60% of all parotid gland tumors, 50% of submandibular gland tumors. and only 25% of sublingual gland neoplasms. Fifty percent of all oral minor gland tumors are pleomorphic adenomas of which 55% arise in the palate, 25% in the lip, 10% in the buccal mucosa, and 10% from all other oral and oropharyhgeal sites. The presence of tumors within the parapharyhgeal space is rare. Some investigators have reported pleomorphic adenomas originating in the deep lobe of the parotid gland advancing to involve this region, as well as primary pleomorphic adenomas of nonparotid origin. We present a case report of pleomorphic adenomas in the parapharyhgeal space with literature review. The tumor was completely removed under general anesthesia via submandibular incision with the division of mandible.

아산시 5대 저수지의 오염부하량 산정을 통한 수질오염 요인분석

장봉기;김민중;최재호;이종화 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.2

Five great reservoirs located in Asan city (Gungpyeong, Gahye, Togo, Masan, Bongjae) for each of the inflow of water pollutants (biochernical oxygen demand (BOD), suspended solids (SS), total nitrogen (T-P), total phosphorus (T- P) in units of pollutant loads were calculated by estimating. The results were as follows; The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 58.7%, 85.4%, 59.1% and 91.2%, respectively of total water pollution load in the reservoir Gungpyeong. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 96.1%, 97.6%, 96.2% and203rmb 99.5%, respectively of total water pollution load in the reservoir Gahye. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 93.8%, 96.9%, 91.7% and 98.7%, respectively of tot~l water pollution load in the reservoir Togo. The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 39.3%, 71.6%, 52.2% and 76.2%, respectively of total water pollution load in the reservoir Masan The ratio of livestock wastewater for BOD, SS, T-N and T-P were occupied with the 96.3%, 98.5%, 96.2% and 99.5%, respectively of total water pollution load in the reservoir Bongjae. Total amounts of each water pollutants was highest in the basin of reservoir Bongjae and the next Gahye, Togo, Masan. Reservoir Gungpyeong was lowest in five reservoirs located in Asan Clty. These results suggest that contamination of the reservoir inflow in Asan city, water pollution management for the reservoirs will be focusing on the livestock wastewater.

로봇 비젼 제어를 위한 확장 칼만 필터링 모델 개발

장완식,박성일,이성민,김기영,신광수 朝鮮大學校 機械技術硏究所 2002 機械技術硏究 Vol.5 No.2

The computational time in estimating the parameter of vision control algorithm is very important for robot's position control in real time. Unfortunately, the batch estimation used commonly requires much computational time because it has iteration method. So, the batch estimation has difficulty for robot's position control in real time. On the other hand, the Extended Kalman Filtering(EKF) has much advantages in that it is a simple and efficient recursive procedures. Thus, this study is to develop the EKF algorithm for the robot's vision control in real time. This vision system used in this study involves the six parameters to account for the camera inner (orientation, focal length etc) and outer parameters (the relative location between robot and camera). Then, EKF is applied to estimate these parameters, and based on estimated these parameters, EKF also is applied to estimate the robot's joint angles used for robot's operation. Finally, Experiment on the robot's position control is performed to show the practicality of vision control scheme based on the EKF.

여수국가산업단지 인근 지역 대기오염물질 농도에 영향을 미치는 요인분석

김민영,변정훈,이영훈,이건영,한지은,이예림,임지현,장봉기 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2

Eight monitoring stations in the Yeosu National Industrial Complex will determine the concentration of air pollutants measured every hour in 2019, analyze what factors affect them, and how they correlate with the air pollutant measurements. Six air pollutants (SO2, NO2, O3, CO, PM-10 and PM-2.5) measured at eight monitoring stations around Yeosu National Industrial Complex (Seogang-dong, Wolnae-dong, Munsu-dong, Yeocheon-dong, Deokchung-dong, Hwayang-myeon, Yulchon-myeon, Samil-dong) the measurement data for each hour of the year were downloaded to analyze the concentration by weather condition, time zone, season, separation distance from Yeosu Industrial Complex, and separation distance from Gwangyang Industrial Complex. SO2, NO2, and CO concentrations were significantly higher in winter, significantly lower in summer, and O3, PM-10, and PM-2.5 concentrations were significantly higher in spring. SO2, CO, PM-10, and PM-2.5 concentrations were significantly higher between 10 a.m. and 12 p.m., NO2 concentrations were significantly higher between 7 a.m. and 9 a.m., and O3 concentrations were significantly higher between 13 p.m. and 15 p.m.(p<0.001). The concentration of air pollutants (SO2, NO2, CO, PM-10, PM-2.5) excluding O3 was found to have a negative (-) correlation with weather condition, and in the case of O3, it was found to have a positive (+) correlation with PM-10, PM-2.5, temperature and wind speed. It was confirmed that the concentration of air pollutants emitted from the Yeosu National Industrial Complex differs depending on the season, time and distance to the industrial complex. This study aims to establish measures to minimize health damage to residents living relatively close to the industrial complex and contribute to the establishment of management and response measures according to the properties of substances to reduce the concentration of air pollutants in the future.

정신병리적 언어행위의 형식적 특징규명을 위한 기초연구

민형원,홍성기,정승아,이장한,양병환 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.4

연구목적 : 정신분열병집단과 정상집단의 사고형태의 차이를 언어철학적으로 접근하여 이해하고 이를 바탕으로 사고형태를 측정하는 도구를 개발하고자 한다. 방 법 : 1997년의 예비실험에서 얻은 결과를 중심으로 새로운 작품사진(具象, 抽象의 彫刻과 繪畵)을 약 50장을 선정한 후 반응의 용이성과 다양성을 기준으로 최종 10개의 작품을 실험도구로 결정하였다. 피검자는 1999년 2월부터 동년11월까지 대학병원 신경정신과에 입원한 24명(정신분열병)과 정상대조군으로 19명의 일반인들이 실험에 참가하였다. 피검자들은 제시되는 작품의 제목을 붙이도록 요구받았으며, 피검자의 세 가지 반응측면 즉 반응의 방식, 반응이 지칭하는 작품의 범위, 그리고 반응이 지칭하는 대상의 구체성 혹은 추상성 여부로 구분하여 전체 7가지 양상으로 기호화하였고 각 반응를 직접과 간접으로 구분하였다. 피검자에게 실험을 실시한 후 기호화하여 집단간 빈도분석을 실시하였다. 결 과 : 1) 정신분열병집단이 정상집단보다 직접속성, 단순기술의 반응이 많은 반면에, 정상집단의 경우 투사가 결합된 직접속성, 간접속성, 간접연상, 그리고 개념의 형성에 필요한 일반화가 많았다. 2) 제목과 이 제목이 지칭하는 작품의 범위관계에 대한 정신분열병집단과 정상집단의 반응빈도는 의미 있는 차이를 보이지 않았으나 두 집단 모두 작품의 부분보다는 전체를 보고 제목을 정하는 경향이 높았고, 비교적 정신분열병집단이 제목을 작품전체를 보고 단순하게 반응하는 경향이 있는 반면에 정상집단은 작품의 일부분을 보고 이를 일반화하는 경향이 많았다. 3) 정신분열병집단과 정상집단 모두 제목의 추상성보다는 구체성이 우세한 경향을 보였으나, 정신분열병집단(95.3%)이 정상집단(71.4%)에 비해서 보다 더 제목의 구체성이 두드러졌으며 정상집단(28.6%)은 정신분열병집단(4.7%)에 비해서 전체 반응빈도에서 제목의 추상성이 더 우세하였다. 4) 정신분열병집단이 정상집단보다 사고의 직접성이 더 높았고(73.5%), 정상집단은 사고의 간접성이 더 높았다.(58.7%). 결 론: 1) 정신분열병집단이 정상집단에 비하여 추론과정과 사고의 단계성이 없는 직접적이고 단순한 형태의 사고형태나 언어표현이 확연히 드러났다. 또한 정신분열병집단이 사물을 지각하고 이를 표현하는데 있어서도 사물의 전체를 보고 단순하게 반응하거나, 구체적이고 직접적인 표현이 많은 것으로 보인다. 2) 본 연구를 통해 개발된 실험도구를 좀 더 넓은 범위의 대상자에게도 반복 적용하여 연구함으로써 지속적인 신뢰도와 타당성을 높일 수 있을 것이다. 또한 개별적 차이에 대한 연구를 병행함으로써 개인간의 혹은 동일한 인물의 시간경과에 따른 사고방식의 차이를 검사할 수 있는 방법으로 정착될 필요가 있다. 3) 비록 양집단 사이의 확연한 차이에도 불구하고 실험도구의 신뢰성을 객관적으로 확보하기 위하여 사고형태 및 언어적 표현에 영향을 미치는 것으로 추정되는 지적능력, 교육연한, 그리고 문화적 경험을 좀 더 고려한 추가연구가 필요할 것으로 생각된다. Objective : The purpose of this study was to identify differences in thinking between schizophrenic patients and healthy subjects with linguistic-philosophical approach and to develop a tool to measure pathological thinking. Methods : Approximately 50 cards(pictures of either representational or abstract sculptures and paintings) from the previous experiment(1997) were carefully examined and 10 cards were selected based on their variety and promptness of the response. Twenty-four schizophrenic patients and 19 healthy subjects participated in this experiment. Participants were required to give a title to each picture. Their responses were analysed based on the forms of thinking, abstractness(or concreteness) and the category of the title. Each response was also coded either direct of indirect. Results : 1) Schizophrenic patients emitted more direct and simple descriptive responses whereas healthy subjects showed projection-related direct traits, indirect traits, indirect association and generalization. 2) Both groups tended to utilize the whole rather than parts. Schizophrenic group depended more on the whole pictures than healthy group. Healthy subjects showed more generalization tendency with parts. 3)Both groups preferred concrete titles to abstract ones. Schizophrenic group(95.3%) used more concrete titles than healthy group(71.4%) and healthy group(28.65%) used more abstract titles than schizophrenic group(4.7%). 4) Schizophrenic patients(73.5%) showed more directness in thinking than healthy subjects, whereas healthy subjects(58.7%) more indirectness. Conclusions : 1) Schizophrenic patients clearly showed direct and simple forms of thinking and expressive language, lacking reasoning, and systematic processing. Additionally, schizophrenic patients simply responded to the whole and used concrete and direct expression. 2) Replication study is warranted to improve reliability and validity of the tool we developed. Research on individual differences needs to be conducted to measure differences among individuals and change over time in an individual. 3) Further study on the factors which might be related to forms of thinking and language expressions, such as intelligence is warranted.

은행잎 추출물이 협심증 환자의 내피 세포 기능에 미치는 장단기 효과

배장호,김기식,이인규,김여희,김민수,김기영,남창욱,김윤년,김권배,정시전 대한순환기학회 1999 Korean Circulation Journal Vol.29 No.9

Ti 鎔接材의 機械的 特性 및 殘留應力의 分布에 關한 硏究

최병기,장경천,국중민,정장만,구남열 한국산업안전학회 2003 한국안전학회지 Vol.18 No.1

The objective of this paper was to investigate the welding characteristics according to the restraint condition, the pass number, and the shield gas quantity with titanium commonly using in power stations, aircrafts, ships, and so forth. The residual stress distribution was measured under restraint and nonrestraint welding conditions. The tensile strength and elongation of the 4 pass welded specimen were shown higher about 10% and 30% than those of the 7 pass welded specimen at the same welding conditions respectably. Also, the more shield gas quantity and the shorter natural cooling time, the higher tensile strength and the lower elongation.