개의 흉추 및 요추에서 배측 추궁절제술 1례

김명철,이재일,이수진,김종만,황학균,서지민,이영원,김덕환,신상태 충남대학교 수의과대학 동물의과학연구소 2000 動物醫科學硏究誌 Vol.8 No.-

In dorsal laminectomy for the surgical treatment of thoracolumbar disc disease in dog, the bur could slip into the vertebral canal. For the decrease of this probability of danger, osteotome was used with instruments such as bur and rongeur in dorsal laminectomy. At thoracic vertebrae (T10-T11) and lumbar vertebrae (L5-L6) area, dorsal laminectomys were performed in a dog. In observation for 3 months after surgery, the dog revealed healthy physical condition. For the confirmation of healing condition at 3 months after dorsal laminectomy, two surgical sites were exposed by incision. Excellent healing response was observed with no adhesion and fibrosis in the vertebral canal.

無酸素性 運動能力과 生理學的 變因의 關聯性

김기진,윤성원,김학열,정정진,우도영,노성규,손태열,안의수 江原大學校附設 體育科學硏究所 1991 江原大學校附設體育科學硏究所論文集 Vol.- No.16

Wingate test 및 Supramaximal exercise를 이용한 무산소성 운동능력의 측정시 나타난 변인의 관련성을 살펴본 본 연구를 요약하면 다음과 같다. Wingate test시 혈중젖산농도 최고치는 9.04±0.62mM로서 Supramaximal exercise시 보다 유의하게 높았으며, 혈장 LDH 및 CPK활성도는 두가지 운동부하후 모두 유의한 변화는 나타나지 않았다. 근전도상의 적분치, 중간파형빈도 및 평균파형빈도도 유의한 변화는 없었다. 등속성 수축시의 최대토오크는 양쪽 다리 모두에서 초당 60도의 각속도에서가장 높았다. Wingate test시의 최대파워는 등속성 수축시 최대토오크 및 Wingate test시 중간파형빈도의 직접적인 영향을 받는 것으로 나타났으며, 평균파워는 Wingate test시의 적분치 변화, 듣는 쪽 슬관절의 등속성 수축시최대토오크 및 Supramaximal exercise시 혈장 LDH 활성도의 직접적인 영향을 받는 것으로 나타났다. 이상의 결과에서 무산소성 운동능력과 관련지어 그 기전을 살피고자 할 때 체내 화학적 변화, 전기생리적 변화 및 발현능력의 복합성을 고려해야 하며 최대누적 산소결핍량의 활용가능성은 측정강도 결정방법을 중심으로한 계속적인 연구가 요구된다. The present study examined the relationship of variables related to anaerobic capacity with Wingate test and supramaximal exercise. Peak value of blood lactate concentration with Wingate test showeda significantly higher than suprammaximal exercise, and plasma LDH & median power frequency and mean power frequency were not any difference between two tests. Peak torque of isokinetic contractionh on knee joint showed a highest value in 60 degrees of angular velocity among a various angular velocity. Peak power of Wingate test was related to peak torque of isokinetic contraction and median power frequency of EMG with Wingate test, and mean power of Wingate test was related to integrated EMG with Wingate test, peak torque with isokinetic contraction of dominant knee joint and plasma LDH activity with supramaximal exercise. In this result, when it analyzed the mechanism of anaerobic capacity, ti was required the consideration of complexity according to biochemical alteration, electrophysiological alteration and revelation of performance, Appicapability of maximal accumulated O₂deficit was demaned a continuous study with the focus of exercise intensity.

키레이트 滴定法에 의한 물중 칼슘, 마그네슘 定量에 있어서 Amberlite LA-2의 利用

김연두,배준현,김학수 충남대학교 1985 忠南科學硏究誌 Vol.12 No.2

This study is on the determination of calcium and magnesium in water at very low concentration. Iron(Ⅲ) was added to the sample, and calcium and magnesium were precipitated with iron by adding sodium carbonate and ammonia water. The precipitates were dissolved in conc-HCI and then Fe(Ⅲ) was removed by extraction with Amberlite LA-2. The residual aqueous solution containing calcium and magnesium were determined. Calcium and magnesium are determined by EDTA method respectively after separating them with sodium oxalate. This method, showing the small average relativity of error (less than 3.0%), is very useful to determine low concentration of calcium and magnesium in the water.

선형계획법을 위한 수정된 후보제약식 해법

김학수 慶尙大學校 1988 論文集 Vol.27 No.1

선형계획법 문제를 푸는 해법 중에서 실용적인 측면에서 볼 때 심플렉스 해법은 아주 우수한 결과를 보여 주고 있으며, 최근의 Sethi와 Thompson의 논문은 후모제약식어란 개념을 도입하여 많은 불필요한 제약조건식들을 계산과정에서 소거시킴으로써 기존의 심플렉스 해법보다 여러 가지 면에서의 우수성을 보인 바 있다. 본 논문은 그들의 논문에서의 probing step에 대한 문제점의 검토 및 개선 방안을 제시하며 이단계 방식 해법에 대한 문제점과 개선점들을 밝히고자 한다.

전립선암의 예측인자로서 전환대 전립선특이항원의 유용성

김현학,권동득,오봉렬,박광성,류수방,박양일 全南大醫大 2001 전남의대학술지 Vol.37 No.3

Drosera rotundifolia와 D. spatulata의 조직배양시 식물체 재생에 미치는 몇가지 영향

권수정,김학현,이철희 충북대학교 첨단원예기술개발연구센터 2000 연구보고서 Vol.5 No.-

Drosera spatulata는 영양분의 요구도가 낮아 1/2MS배지에서 가장 많은 식물체가 재생되었다. 대부분의 Drosera속 식물들은 식물체의 재생과 생장에 질소원의 요구도가 낮아 D. spatulata와 D. rotundifolia의 경우 MS배지의 1/4배에서 가장 많은 식물체가 재생되었다. 적정 sucrose의 농도는 식물의 종마다 달라 D. spatulata의 경우 4%에서 D. rotundifolia는 1%에서 무처리구에 비해 많은 식물체의 재생을 보였다. 대부분 활성탄은 식물체의 재생에 효과적이었으나 뿌리의 형성은 억제되는 경향이었다. D. spatulata는 0.05%에서, D. rotundifolia는 0.01%에서 가장 많은 식물체 재생을 보였다. 식물체 재생은 D. spatulata는 0.6%의 agar를 첨가한 배지에서 D. rotundifolia는 액체배지에서 가장 효과적이었다. pH 실험의 결과 D. spatulata는 pH 4.5에서 가장 많은 식물체 재생을 보였다. The study was conducted to fine out the effect of Drosera species showed generally low nutrient requirement, the highest shoot production was obtained with 1/2 strength of MS medium for D. spatulata than with any other strength of MS medium tested. The nitrogen requirement of Drosera species were also relatively low. The maximum shoot regeneration was achieved when cultured in 1/4 strength of nitrogen contained MS medium. The optimum sucrose concentration for each species was different, such as 4% for D. spatulata; 1% for D. rotundifolia. In general, activated charcoal had positive effect on shoot proliferation, but had negative effect on root formation of Drosera species. The best shoot regeneration was achieved on MS medium containing 0.05% activated charcoal for D. spatulata, 0.01% for D. rotundifolia. Shoot regeneration of Drosera rotundifolia was better in MS liquid medium and D. spatulata showing best results on 0.6% agar. The maximal shoot proliferation was achieved on the media adjusted to pH 4.5 for D. spatulata respectively.

사업장 소음 폭로에 의한 일과성 역치 상승과 회복

조수헌,하미나,한상환,주영수,성주헌,강종원,윤덕로,송동빈,이명학,김선태 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.2

To determine the recovery time from noise-induced temporary threshold shift(TTS), a prospective field study was conducted at three worksites where workers are known to be exposed high level of noise. Subjects were selected according to answers on a questionnaire which inquired about otological history and previous noise exposure, including avocational, military and occupational exposures. After excluding employee with past otologic problems, recent exposure to high level noise, and under medications, total 92 employees participated in the study. Among 92 participants, complete consecutive audiometric examinations were carried out at 0∼2 hours, 5∼7 hours, 14∼16 hours after worktime noise exposure on 26 participants wearing hearing protectors and 22 participants wearing no protective devices. The difference between the hearing level 0∼2 hours after noise exposure and 5∼7 hours is statistically significant by paired t-test(p<0.01). The median recovery times calculated from the data of 22 participants wearing no protective hearing devices are 15.6 hours at 4000Hz, and 7.7 hours, 10.3 hours, 8.4 hours at 1000Hz, 2000Hz and 8000Hz respectively. These data suggest that when measuring the pure tone audiometry for noise exposed workers, at least 16 hours noise-free interval is required.

대기압 스트리머 코로나방전특성 및 이산화탄소 전환특성

조문수,김학규,곽동주,신용섭 경성대학교 공학기술연구소 2001 공학기술연구지 Vol.8 No.-

Deep interests have been paid on the application of non-thermal plasma technique th solve the environmental pollution problems. CO_2 is one of the severe pollutants which cause the acid rain and global warming. In this study, in order to improve the conversion efficiency of CO_2, the streamer corona discharge plasma and barrier discharge plasma reactors were made, and the conversion characteristics of CO_2 by the corona discharge plasma and some discharge characteristics of these discharge chambers are studied experimentally.

장시간 싸이클 주행중 혈장 글루코스,젖산,소디움 및 포타시움 농도의 변화

김창근,김근우,김양수,김학렬,최용어,홍경란 韓國體育大學校附屬 體育科學硏究所 1991 韓國體育大學校附屬 體育科學硏究所論文集 Vol.10 No.1

장시간 최대하 싸이클 주행중 근피로를 파악하기 위한 지표로서 소디움, 포타시움 농도의 변화양상을 살펴보고자 대학 대표급 싸이클 선수 14명을 대상으로 롤러위에서 시속 40 - 41km의 싸이클 주행속도를 유지할 수 있도록 조절하여 120분동안 수행하도록 하였다. 혈장 글루코스, 젖산, 소이움 및 포타시움 농도의 측정을 위한 혈액쌤플은 새벽 6시 기상직후와 실험시작전(0), 운동 30분, 60, 90, 120분에 주전정맥에서 약 5ml의 혈액을 채혈하였다. 혈장 글루코스와 젖산농도는 spectrophotometer를 이용하여 효소법으로 측정하였으며 소디움, 포타시움 농도는 Flame photometer를 이용하여 standard method로 측정하였다. 혈장 글루코스와 포타시움 농도는 운동 전체를 통하여 큰 변화가 없는 것으로 나타났으며(P>.05) 젖산 및 소디움 농도는 운동의 시간경과에 따라 증가되는 경향(P<.05)을 나타내었으나 운동부하에 따른 변화폭은 적은 것으로 나타났다. 그러나 혈장 소디움 농도는 혈장의 젖산농도와 함께 유사한 변화양상을 나타냄으로서 다소의 관련성을 엿볼수 있어 이의 규명을 위한 계속적인 연구가 요구된다. The purpose of this study was to determine a significance of sodium (Na??) and potassium(K??) concentration with indicators for estimate a muscular fatigue during prolonged submaximal cycle race. Forteen endurance-trained cyclists were used as subjects in the study. The exercise protocol consisted cycle race for 120min on the rollers cycle. The blood sample for measurement of plasma glucose, lactate, sodium and potassium concentration were drawn to A.M.6:00, pre-cycling(0), 30, 60, 90, and 120 min of cycling by collected about 5ml in the antecubital vein. Plasma glucose and lactate concentration measured by enzymatic technique using spectrophotometer, also sodium and potassium concentration measured by standard method using flame photometer. Plasma glucose and potassium concentration was not significance difference(P>.05) during prolonged cycle exercise, but plasma lactate and sodium concentration was shown increase during time course of prolonged cycle race(P<.05). However, plasma lactate and sodium concentration shown increase of small range during cycle race. Sodium concentration was requested continuous research by shown simillar patterns with plasma lactate concentration.

Physicochemical Characteristics, Antimicrobial Activity, ACE Inhibitory Activity of Chitosan-salt, and Its Antihypertensive Effect

Hag-Lyeol Kim,Soo-Mi Park,Geon-Sik Cho,Kye-Yeop Kim,김인철 한국식품과학회 2010 Food Science and Biotechnology Vol.19 No.3

This study was performed to investigate the physicochemical characteristics after producing chitosansalt by adding chitosan to salt. Cl− value of chitosan-salt was same with that of the control group and that meant the salinity of the chitosan-salt was not different with that of the salt. While salt generally increases angiotensin converting enzyme (ACE) activity, chitosan-salt inhibited the ACE activity. For all microorganisms 3% chitosan-salt was the most effective in antimicrobial activity. When systolic blood pressure (SBP) of Sprague-dawley rats (SDR) was examined for 5 weeks to evaluate in vivo effects of chitosan-salt, all groups did not show significant difference between supplement period and group. In addition, plasma total cholesterol (TC) and triglyceride (TG) concentration were not different in all groups. This result was considered to be use of normotensive SDR so changes of SBP were investigated with spontaneous hypertensive rat (SHR). normal diet supplement group (NDSG) administered with captopril showed the largest decrease of SBP (p<0.001)and SBP of normal diet+3% chitosan salt supplement group (CSSG) also decreased significantly (p<0.001). However, that of normal+3% table salt supplement group (TSSG) increased significantly with times course (p<0.001). These results suggested that increasing blood pressure in salt intake by using chitosan was caused by not sodium but chloride and chitosan’s effect of eliminating Cl from NaCl was considered to be a main cause.