전국 단위 감시체계의 현황과 전망

강성규,안연순,지영구,김형옥,하미나,권호장,백남종,김성아,홍윤철,김재용,강대희,정혜선,하은희 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.2

國內飼育 犬에 있어서 心臟絲狀蟲의 感染率에 관한 調査 硏究

Ji Hee Seong(成知禧),Hwa Joong Yoon(尹和重),Won Chang Lee(李元暢),Kwang Ho Kim(金光浩),Seung Won Kang(姜承遠) 한국예방수의학회 1996 예방수의학회지 Vol.20 No.2

The purpose of this study was carried out an epidemiological survey on the prevalence rate of the canine heartworms in Seoul City and the districts of Pa-Ju, Seong-Nam and Po-Chon in Kyonggi province of Korea from September 1994 to the end of September 1995. The blood samples from 292 male and 193 female dogs (pet, 363 ; fighting dogs, 60 ; working dogs, 62) were examined for the adult heartworms cuticle antibodies using the enzyme-linked immunosorbent assay (ELSA) kits. The test was designed to detect the antibodies of the host against the specific cuticle antigens produced with the adult heartworms.

고등학교 지구과학 실험·실습 요목 비교 분석

정원우,이윤종,기우항,김영호,양승영,강용희,안병호,임성규,윤일희,김중욱,윤성효,강동진 경북대학교 과학교육연구소 1997 科學敎育硏究誌 Vol.21 No.-

The purpose of this study is to investigate the status of the experimental and practical education in high school earth. The present status and reasonable management of the experimental and practical education in high school earth science have been grasped from the questionaires. To do this, eighty eight earth science teachers in Korea are administered questionaires. The frequency of the experimental and practical items in the seven kind of earth science text books were investigated. The problems and the reasonable management for experimental and practical education were proposed in this paper.

현행 중학교 과학 실험·실습교육에 대한 교사들의 견해와 개선방안

이윤종,기우항,김영호,정원우,양승영,강용희,안병호,임성규,윤일희,김중욱,강동진 경북대학교 과학교육연구소 1996 科學敎育硏究誌 Vol.20 No.-

The status of facilities, management of the experiment, practices, and Science education teaching method in middle school have been investigated. The present status and reasonable management of middle school science education have been grasped from the questionaires. The results are as follows : The reasonable management for expeiments and practices of science education were scanty in the middle school around the urban and rural schools owing to the shortage of facilities and equipments, crowded class, excessive classes, work for teachers, excessive contents of present textbook and insufficience of administrative support etc. The current teaching method of middle school science has emphasized knowledge. This fact does not satisfy the objective of learning due to lack of teaching method. Desirable directions for the improvement of present status of middle school science education were proposed in this paper.

캬라멜 반응에서 반응 중간물질에 미치는 첨가물의 효과

강근옥,이성희,이현자 안성산업대학교 1998 論文集 Vol.30 No.2

식품의 비효소적 갈색화 반응중 caramel화 반응을 이용하여 간장, 쵸코렛, 콜라, 맥주, 약과, 약식등의 식품에 이용되는 caramel색소 제조에 관하여 연구하였다. Caramel화 반응의 반응속도를 향상시키기 위한 반응온도, pH 그리고 인산염, 유기산, 아미노산 의첨가에 따른 영향을 보기 위하여 반응 중 5-hydroxymethylfurfural 갈색도 및 탁도등을 측정하였다. 1. 80-110℃범위에서 반응온도가 증가함에 따라 5-hydroxymethylfurfural의 함량이 높게 나타났으며 또한 온도에 따른 5-hydroxymethylfurfural 함량의 차이가 갈색도나 탁도의 차이 보다 높았고 이 중 탁도는 그 차이가 가장 작았다. 2. 5가지의 당을 사용하여 반응속도의 차이를 실험한 결과 280nm에서 측정한 5-hydroxymethylfurfural의 양은 18~24시간경과후에 급속히 증가하는 경향을 나타내었다. 24시간 반응후의 5-hydroxymethylfurfural의 양은 fructose와 sucrose가 다른 당들에 비하여 10배가량 높게 나타났다. 또 5-hydroxymethylfurfural생성은 pH의 증가에 비례하여 높아졌는데 pH 10에서 가장 높은 함량을 나타내었고 당의 종류별에서는 fructose, glucose, starch syrup, maltose, sucrose등의 순으로 높게 나타났다. 또한 110℃에서 24시간 반응시킨 결과 fructose가 sucrose보다 18배 높게 나타났다. 3. 인산염과 유기산염을 첨가하여 5-hydroxymethylfurfural, 갈색도 및 탁도를 측정한 결과 인산염 중에서는 K_(2)HPO_(4)가, 유기산염 중에서는 sodium oxalate와 sodium citrate가 가장 높게 나타났다. 그러나 K_(2)HPO_(4) 와 두가지 유기산염을 혼합첨가한 결과 반응속도 향상효과는 저하되었다. 4. 아미노산을 첨가하여 caramel화 반응에 대한 영향을 조사한 결과 glycine과 arginine이 매우 높은 촉매효과가 있음을 알수있었다. 또한 glycine, arginine, HAP를 인삼염과 혼합첨가한 결과 K_(2)HPO_(4)-glycine(1:4), K_(2)HPO_(4)- arginine(3:2), K_(2)HPO_(4)-HAP(3:2)의 혼합비율에서 가장 높은 촉매 효과를 나타내었다. Effects of temperature, pH, sugars, phosphates, organic acids and amino acids on caramelization were investigated to improve the reaction rates. The caramelized solutions during reaction were measured 5-hydroxymethylfurfural(HMF), brown color and turbidity. Among the five sugar used, fructose showed the fatest overall color development followed by sucrose, glucose, starch syrup and maltose heated at 110℃. The HMF which was measured at 280nm was increased rapidly after 18~24 hours of the reaction. After 24 hours at 110℃, fructose and sucrose formed HMF about 10 times of other sugars. The effect of pH showed that increase in pH generally increased the reaction rate. The HMF formed also showed a similar increase as in the reaction rate. The order of HMF formed was fructose-glucose-starch syrup- maltose-sucrose and the fructose produced the HMF 18 times more higher than sucrose after 24 hours at 110℃. Addition of phosphate, oxalate, citrate and succinic acid showed that K_(2)HPO_(4) was more effective than other phosphates and sodium oxalate and citrate were also effective. However when K_(2)HPO_(4) was mixed with oxalate or citrate, the HMF content, brown and turbidity. Also, addition of several amino acids to starch syrup, which would cause the maillard reaction addition to caramelization, resulted a very significant increase in HMF content, brown and turbiditye when arginine or glycine was added. Wthen the phosphate was mixed with amino acids or hydrolyzed protein the HMF content, brown and amino acids or hydrolyzed protein the HMF content. brown and turbidity were much increased higher at the mixing ratio of K_(2)HP0_(4)-glycine(4:1), K_(2)HPO_(4)-arginine (2:3) and K_(2)HPO_(4)-HAP(2:3), and K_(2)HPO_(4)- glycine(4:1).

國內飼育 犬에 있어서 心臟絲狀蟲의 感染率에 관한 調査 硏究

成知禧,尹和重,李元暢,金光浩,姜承遠 한국수의공중보건학회 1996 예방수의학회지 Vol.20 No.2

만성 스트레스에 대한 뇌 및 위장관계의 Polyamine반응 : 단일성 및 복합성 스트레스의 차이 Differences between Single and Complex Type Stress

강영우,김희철,이성룡 대한생물치료정신의학회 2001 생물치료정신의학 Vol.7 No.2

Objectives : There is a hypothesis that subject may adapted to same kind repetitive stress. Polyamine(putrescine, spermidine, and spermine) is one of the stress responses in brain and peripheral organs. Therefore, we designed this study to investigate the differences between single and complex type of chronic stresses by examining the changes of polyamine levels in brain and peripheral tissues. Method : There are four groups in this study. 1) control group(n=5) : animals with no stress, 2) immobilization stress group(n=5) : animals with 10 times of immobilization stress, 3) cold-water swimming stress group(n=5) ; animals with 10 times of swimming stress in cold water, 4) complex stress group(n-5) : animals with immobilization and cold-water swimming stress. For immobilization stress(10 days), rats were placed in restrainers once daily, for 3 hours, For cold water swimming stress, rats were placed in ice-cold water once daily for 3min(10 days). For complex stress, rats were alternately underwant immobilization stress and cold swim stress, for 10 days(5 times, respectively). For polyamine analysis, polyamine extracted from brain tissue(frontal cortex and hippocampus) and gastrointestinal tract(gastric and duodenal mucosa) and measured with high performance liquid chromatography and ultraviolet detector at 242nm. Results : Putrescine levels in frontal cortex were significantly decreased by immobilitation stress and complex stress, respectively. Putrescine levels in hippocampus were significantly decreased by immobilization stress. Spermidine levels in duodenal mucosa were significantly decreased by cold swimming stress. However, spermine levels were not changed by any type of stress. There were no differences in polyamine reponses between single type and complex type stresses. Conlusions : Attenuations of putrescine and spermidine levels after chronic stresses seem to be a adaptation process of polyamine responses. In our experimental conditions, there are no differences in polyamine responses between single type and complex type stresses.

漸進的·急進的 運動負荷가 血液의 pH, Sugar 및 Lactate에 미치는 影響

姜炯基,辛元太,白永守,殷熙寬,宋基成,河哲秀 漢陽大學校 體育科學硏究所 1986 體育科學 Vol.6 No.6

The purpose of this study is to in-vestigate the effects of gradual and radical exercise load on the treadmill for PH, Sugar and Lactate in Blood by selecting 14 subjects in H university, All subjects began exercise by 6mPH for 4 minutes at start and increased exercise speed up to HR 140 by increasing every minute as gradual load. And subjects began exercise by 9mPH at first and increased load up to HR 140 as radical exercise load. The results are as follows: (1) In PH in Blood, gradual exercise load is lower than radical training in all subjects. (p<0.05) (2) In Sugar in Blood, radical exercise load is higher than gradual exercise load in all subjects. (p<0.05) (3) In Lactic Acid in Blood, gradual training is higher than radical exercise load in all subjects. (p<0.01) (4) In Lactic Acid, all subjects showed high value and its is also in Sugar, than the method of exercise load is according to anaerobic energy metabolism.

카올린으로부터 합성된 고순도 알루미나의 γ→α변태에 미치는 Fe₂O₃첨가의 영향

강효경,박성수,박희찬 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

국내산 카올린으로부터 알루미늄황산염수화물을 합성하고, 이의 특성 및 열분해에 따른 알루미나의 γ→α변태에 미치는 Fe₂O₃의 첨가효과가 X-선회절분석, 시차열중량분석, 주사전자현미경, 플라즈마분광분석, BET법을 이용하여 검토하였다. 합성된 2 ㎛정도 크기의 판상입자형태로 구성된 고순도 알루미늄황산염은 Al₂(SO₄)₃·18H₂O로 동정되었으며, 이는 150℃ 부근에서의 탈수반응과 750℃부근에서의 탈황산반응을 경유하여 1000℃에서 결정성이 낮은 γ-Al₂O₃로 변화하였고, γ→α변태는 1200℃정도에서 일어났다. 0.1 wt% Fe₂O₃를 첨가한 경우의 1200℃하소물에서 생성된 FeAl₂O₄스피넬은 알루니마의 γ→α변태를 억제시켰으며, 그 이상의 양을 첨가한 경우와 1300℃로의 하소온도를 증가시킨 경우는 FeAl₂O₄의 α-Al₂O₃와 Fe₂O₃로의 분해 및 이온확산속도의 증가로 인하여 α-Al₂O₃생성이 촉진되었다. Aluminum sulfate hydrate has been prepared from the domestic kaolin, and its characteristics and the effect of Fe₂O₃addition on the γ→αtransformation of the resulting alumina have been investigated by means of the XRD, TG/DTA, SEM, plasma spectrometer, and BET methods. The aluminum sulfate having high purity and 2 ㎛-sized plate-like structure particles was identified as a crystalline Al₂(SO₄)₃·18H₂O, and decomposed to γ-Al₂O₃at 1000℃ via dehydration at ∼150℃ and desulfurization at ∼750℃. γ-Al₂O₃transformed to α-Al₂O₃at 1200℃. After calcination of the aluminum sulfate with addition of 0.1 wt% Fe₂O₃at 1200℃, the formation of FeAl₂O₄spinel prohibited the γ→αtransformation of the alumina. However, the addition of > 0.1 wt% Fe₂O₃and the increase in calcination temperature to 1300℃ accelerated the γ→αtransformation, due to the decomposition of FeAl₂O₄to α-Al₂O₃and Fe₂O₃and the velocity of ion diffusion, respectively.

초임계 이산화탄소를 이용하는 친환경 공정에 의한 다공성 고분자의 제조

강세란,홍성수,이민규,이석희,천재기,주창식 한국환경과학회 2004 한국환경과학회지 Vol.13 No.3

An experimental study on the preparation of monolithic porous polymers by environmentally friend process in supercritical carbon dioxide has been carried out. Polymerization mixture composed of a cross-linking monomer, initiator and functional co-polymer was charged in the reactor with sapphire window. After the system was purged with a flow of CO₂ for 15 min, the reactor was pressurized with liquid CO₂ up to 100 bars. The reactor was isolated from and placed back to the system via quick connector for shaking until the mixture had become fully homogeneous. The reactor was then heated and pressurized to the required reaction conditions and left overnight. After cooling and CO₂ evacuation, the polymer was removed from the reactor as dry, white, continuous monoliths. The effect of experimental conditions on the physical properties of porous polymer was systematically examined, and it was found that monomer content had a major effect on the physical properties of the polymers.