수도포장에서의 동력경운기의 주행성에 관한 연구

이규승,이용국,이중용,박승제,김상헌 ( Kyou Seung Lee,Yong Kook Lee,Choong Yong Lee,Seung Je Park,Sang Hun Kim ) 한국농업기계학회 1984 바이오시스템공학 Vol.9 No.2

Studies on the Sex Hormone Level is Serum of Puerperal Sow

이규승,박창식,Lee, Kyu Seung,Park, Chang Sik Institute of Agricultural Science 1981 農業技術硏究報告 Vol.8 No.1

돼지에 있어서 분만전후(分娩前後)의 혈청중(血淸中) peptide 및 steroid hormone 수준(水準)의 변화(變化)를 구명(究明)하기 위(爲)하여 8두(頭)의 임신돈(妊娠豚)을 대상(對象)으로 분만전(分娩前) 20일(日)부터 분만후(分娩後) 20일(日)까지 혈청중(血淸中)의 FSH, LH, prolactin, estradiol-$17{\beta}$, progesterone 및 cortisol의 농도변화(濃度變化)를 radioimmunoassay 방법(方法)에 의(依)하여 측정(測定)하였다. 혈청(血淸) FSH의 농도(濃度)는 분만전후(分娩前後)에 큰 변화(變化)가 없었으며, $8.1{\pm}1.8mIU/ml$에서 $9.0{\pm}2.6mIU/ml$의 사이에 있었다. LH농도(濃度)는 분만(分娩) 20일전(日前)에 $2.6{\pm}0.3mIU/ml$이던것이 분만일(分娩日)에는 $3.9{\pm}1.1mIU/ml$로 증가(增加)하였으며, 분만후(分娩後) 2일(日)에는 $3.2{\pm}0.9mIU/ml$로 감소(減少)되었고, 그 후(後)로는 거의 비슷한 수준(水準)을 유지(維持)하였다. Prolactin의 농도(濃度)는 분만일(分娩日)에 $68.5{\pm}9.5ng/ml$로 최고수준(最高水準)을 나타냈으며, 분만당일(分娩當日) 전후(前後)에 비교적(比較的) 높은 수준(水準)을 나타냈다. Estradiol-$17{\beta}$는 분만전(分娩前) 6일(日)에 $205.0{\pm}29.5pg/ml$로 증가(增加)하였고, 분만일(分娩日)에는 $425.0{\pm}35.6pg/ml$로 급증(急增)하였으나 분만후(分娩後) 2일(日)에는 $59.5{\pm}7.8pg/ml$로 다시 감소(感少)했다. Progesterone 농도(濃度)는 분만전(分娩前) 20일(日)부터 6일(日)까지는 $18.4{\pm}1.6{\sim}20.2{\pm}2.1ng/ml$사이에 있었으나, 분만전(分娩前) 2일(日)부터 감소(減少)하기 시작(始作)하여 분만일(分娩日)에는 $2.6{\pm}0.8ng/ml$까지 감소(減少)하였고, 분만후(分娩後) 2일(日)에는 $0.9{\pm}0.3ng/ml$에 도달(到達) 하였으며, 그 후(後)로는 거의 같은 수준(水準)을 유지(維持)하였다. Cortisol은 분만일(分娩日)에 $86.5{\pm}10.5ng/ml$로 최고수준(最高水準)을 나타냈다. The present study was carried out to study the serum concentration of peptide and steroid hormones in puerperal sow. Eight crossbred sows were used for collection of blood samples from day 20 prepartum to day 20 postpartum. FSH, LH, prolactin, estradiol-$17{\beta}$, progesterone and cortisol were assayed by radioimmunoassay methods. The mean serum FSH did not vary during the puerperal period and ranged from $8.1{\pm}1.8mIU/ml$ to $9.0{\pm}2.3mIU/ml$. LH concentrations increased from $2.6{\pm}0.3mIU/ml$ at day 20 prepartum to $3.9{\pm}1.1mIU/ml$ at the time of parturition, reached $3.2{\pm}0.9mIU/ml$ by day+2 and remained quite constant therafter. Prolactin reached a peak mean level of $68.5{\pm}9.5ng/ml$ at day 0. Estradiol-$17{\beta}$ increased from $205.0{\pm}29.5pg/ml$ at day 6 prepartum to $425.0{\pm}35.0pg/ml$ at the time of parturition. Progesterone remained fairly constant ($18.4{\pm}1.6$ to $20.2{\pm}2.1ng/ml$) from 20 to 6 days before parturition, began to decline on day-2, reached $0.9{\pm}0.3ng/ml$ by day+2 and remained quite constant thereafter. Cortisol reached a peak level of $86.5{\pm}10.5ng/ml$ at the day 0.

수생식물(水生植物)을 이용(利用)한 수질오염원제거(水質汚染源除去)에 관(關)한 연구(硏究) - 제2보(第2報) 부레옥잠의 영양염류(營養鹽類) 및 중금속(重金屬) 제거효과(除去效果)

이규승,김문규,변종영,이종식,Lee, Kyu-Seung,Kim, Moon-Kyu,Pyon, Jong-Yeong,Lee, Jong-Sik 한국잡초학회 1985 Weed&Turfgrass Science Vol.5 No.2

열대성(熱帶性) 수생식물(水生植物)인 부레옥잠(Eichhornia crassipes)의 오염물질(汚染物質) 제거효율(除去效率)에 관한 실험(實驗)을 통해 나타난 결과(結果)를 요약(要約)하면 다음과 같다. 1. 초기농도(初期濃度) 10, 25 및 50 ppm 용액(溶液)에 대해 처리(處理) 3일후(日後) 질산성질소(窒酸性窒素)는 0.7, 0.9 및 1.2ppm 그리고 인산염(燐酸鹽)은 0.1, 0.2 및 0.5ppm 으로 제거(除去)되었으며, 이러한 영양염류(營養鹽類)의 제거능력(除去能力)은 초기(初期)에서 더욱 높았다. 2. 중금속(重金屬)의 제거(除去)는 Cu, Pb에서 컸으며, 중금속(重金屬)에 의한 부레옥잠 피해는 Cu, C에서 심하였고, 식물체에 의한 중금속(重金屬) 제거경향(除去傾向)은 대상 중금속의 종류(種類)에 따라 서로 달랐다. 3. 식물체(植物體)로 흡수(吸收) 제거(除去)된 중금속량(重金屬量)은 농도(濃度)가 높을수록 많았고, 중금속별(重金屬別)로는 Cu, Pb, Cr, Cd의 순이었으며, 식물체내(植物體內)에서의 분포는 뿌리 부분에 많았다. 4. 부레옥잠 처리(處理) 10일후(日後)의 식물체내(植物體內)로의 중금속(重金屬) 흡수(吸收)와 뿌리에 흡착(吸着)은 모두 Cu와 Pb는 Cr과 Cd에 비하여 컸으며, 뿌리에의 흡착량(吸着量)은 농도(濃度)가 높을수록 많았고, 중금속별(重金屬別)로는 Cu, Pb, Cd, Cr 순(順)이었다. Removal of water pollutants by water hyacinth was examined with two nutrients, $NO_3$-N, $PO_4$-P and four heavy metals, Cu, Pb, Cd, Cr under laboratory conditions. $NO_3$-N was reduced to 0.7, 0.9 and 1.2 ppm, and 0.1, 0.2 and 0.5 ppm in $NO_4$-P from 10, 25 and 50 ppm 3 days after treatment, respectively. Among heavy metals Cu and Pb were removed faster and higher than Cd and Cr and also amount of heavy metals absorbed by water hyacinth was higher in the order of Cu > Pb > Cr > Cd. Distribution of heavy metals in this plant was higher in roots than in leaves and amount absorbed in roots was related to the treated concentrations. The harmful effect on growth of water hyacinth was observed in Cu and Cd.

Testosterone Propionate의 투여(投與)가 어린 숫흰쥐의 부신(副腎)에 미치는 영향(影響)

이규승,Lee, Kyu-Seung 충남대학교 농업과학연구소 1976 Korean Journal of Agricultural Science Vol.3 No.2

정소의 기능(機能)이 부신(副腎)에 미치는 영향(影響)을 구명(究明)코져 말성숙(末成熟) 숫흰쥐에 매(每) 10일간격(日間隔)으로 20 mg씩의 testosterone propionate를 투여(投與)한 후(後) 부신(副腎)의 중량(重量) 및 조직학적(組織學的) 변화(變化)를 50일간(日間) 조사하여 정상대조군(正常對照群)과 비교(比較) 검토(檢討)한바 다음과 같은 결론(結論)을 얻었다. 부신(副腎)의 중량(重量)은 처리기간(處理期間)이 경과(經過)할수록 증가(增加)되는 결과(結果)였는데 30일후(日後)부터 유의성(有意性)이 인정(認定)되었다. 부신(副腎)에서 각층(各層)이 차지하는 비율(比率)의 변화(變化)에 있어서, 색상대(索狀帶)는 20일후(日後), 망상대(網狀帶)는 30일후(日後)부터 유의(有意)하게 증가(增加)하였으며, 부신수질(副腎髓質)은 감소(減少)하는 경향(傾向)이었는데 20일후(日後)부터 유의성(有意性) 인정(認定)되었다. 부신(副腎)의 조직학적변화(組織學的變化)는 색상폐(索狀幣)와 망상대(網狀帶)에서는 20일후(日後)부터 세포(細胞)가 비대(肥大)하여지고 공포변성(空胞變性)이 인지(認知)되었으나 피질(皮質)의 구상대(球狀帶)와 부신수질(副腎髓質)에서는 특기(特記)할 만한 변화(變化)가 인지(認知)되지 않았다. In order to find the effects of testis function on adrenal gland, immature male rats were administered by 20 mg of testosterone propionate with 10 days interval for 50 days, and their adrenal weights and histological changes were compared with those of normal ones, and the results obtained were as follow: Adrenal weight was increased with the period of treatments, and especially the significant difference was recognized after 30 days. Of the zones in adrenal gland, the portion of zona fasciculata and reticularis increased significantly after 20 days and 30 days, respectively, while that of adrenal medulla was decreased significantly after 20 days. In histological changes, hypertrophy and vacuolization were observed in zona fasciculata and reticularis after 20 days, but no changes were recognized in zona glomerulosa and adrenal medulla.

Testosterone의 투여(投與)가 흰쥐의 조정기능(造精機能)에 미치는 영향(影響)

이규승,Lee, Kyu Seung 충남대학교 농업과학연구소 1975 Korean Journal of Agricultural Science Vol.2 No.2

Testosterone이 조정기능(造精機能)에 미치는 영향(影響)을 구명(究明)코져 숫흰쥐에 매(每) 10일(日) 간격(間隔)으로 20mg씩의 Testosterone Propionate를 투여(投與)한 후(後) 정소(精巢)의 중량(重量) 및 조직학적(組織學的) 변화(變化)를 50일간(日間) 조사(調査)하여 정상대조군(正常對照群)과 비교검토(比較檢討)한바 다음과 같은 결론(結論)을 얻었다. 1. 정소(精巢)의 중량(重量)은 처리기간(處理期間)이 경과(經過)할수록 감소(減少)되는 결과(結果)를 보였는데 20일후(日後)부터 유의성(有意性)이 조정(詔定)되었다. 2. 곡세정관(曲細精管)의 직경(直徑)은 처리(處理) 40일(日)과 50일후(日後)에 고도(高度)의 유의성(有意性)이 인정(認定)되는 감소(減少)를 하였다. 3. 조정기능(造精機能)이 파괴된 곡세정관(曲細精管)의 비율(比率)은 처리(處理) 20일(日) 후(後)부터 유의성(有意性)이 인정(認定)되는 증가(增加)를 하여 50일(日) 후(後)에 65.8%(대조군(對照群):20.0%)로 최고치(最高値)를 보였다. 4. 정소조직(精巢組織) 구성성분(構成成分)의 비율변화(比率變化)에 있어서 정자(精子)는 20일후(日後) 정낭세포(精娘細胞) 30일후(日後)부터 유의성(有意性)이 인정(認定)되는 감소(減少)를 하였으며 기타성분(其他成分)은 실제적(實除的)인 차이(差異)는 없었다. 5. Testosterone의 과량투여(過量投與)는 조정기능(造精機能)을 파괴(破壞)하는데 정자(精子)와 정낭세포(精娘細胞)가 가장 심(甚)한 손상(損傷)을 받으며 다른 부위(部位)는 큰손상(損傷)을 받지는 않았다. The objective of this study was to examine the effect of testosterone on the spermatogenesis. Testosterone propionate was administered in 20 mg dose to male rat with 10 days interval for 50 days and the treated rat was compared with normal one in their testis weight and histological changes. The results were as follows: 1. The longer treatment gave the more decreased testis weight. Treated rat for more than 20 days was significantly different from the untreated one. 2. Diameter of seminiferous tubule was significantly reduced in 40 and 50 days treatments. 3. The ratio of disrupted spermatogenesis on seminiferous tubles was significantly increased from 20 days treatment. 4. On volumetric proportion of testicular structure, spermatozoa and spermatid were significantly reduced from 20 and 30 days treatments respectively. Other components in testis were not changed. 5. The administration of testosterone in over dose damages spermatozoa and spermatid more than other components in testis.

과학영농의 토착화를 위한 전시포장 운영효과

이규승,이원근,Lee, Gyu-Seung,Lee, Won-Geun 한국과학기술단체총연합회 1980 과학과 기술 Vol.13 No.9

마늘파종기 개발을 위한 기초 연구

이규승,정창주,신익환,노광모 ( K . S . Lee,C . J . Chung,E . H . Shin,K . M . Noh ) 한국농업기계학회 1997 한국농업기계학회 학술발표논문집 Vol.2 No.1

구동륜(驅動輪)의 성능예측(性能豫測)에 적합한 토양변수(土壤變數)의 차원해석(次元解析)을 위한 차륜(車輪)-토양(土壤) 시스템의 상사성(相似性) 연구(硏究)(I) -견인력(牽引力) 예측(豫測) 분석(分析)-

이규승,정창주,Lee, K.S.,Chung, C.J. 한국농업기계학회 1989 바이오시스템공학 Vol.14 No.2

This study was conducted to investigate the applicability of true model theory for pull prediction in a powered lugged wheel-soil system and to examine the possibility of using principles of similitude in investigating the dimensions of soil parameters pertinent to a powered lugged wheel-soil system concerning the pull prediction. The following conclusions were derived from the study; 1) The pull of prototype wheels proved to be predicted by those of the model wheels for the range of the dynamic weight tested. The pull curves of models and prototype were respectively very similar in the shape. From this basic knowledge, it was enabled to apply the similitude theory to the performance prediction of the true model. 2) A conditional equation which can be used for the prediction of pull of prototype by model test was derived as follows. $n_f=n_1^{-b}$ where $n_f$ : force scale = $w/w_m$ $n_1$ : length scale = ${\ell}/{\ell}_m$ b : exponent on the length dimension of the soil property ${\alpha}$ The range of the numerical value of b, which was determined by the least square method, was found to be -2.0~-2.6. 3) Considering a relatively wide variation of b values in the pull prediction, b is considered to be a function of many variales. Thus it was concluded that there are several soil properties which are pertinent to the powered lugged-wheel-soil system concerning the pull prediction, and these soil properties may have the different effects on the pull of model and protytype wheels, to give the different dimension on the soil parameters.

하수체척출 암흰쥐에 있어서 Hexestrol 의 투여가 부신에 미치는 영향

이규승,정영채,김관영 ( K . S . Lee,Yung Chai Chung,K . Y . Kim ) 한국축산학회 1975 한국축산학회지 Vol.17 No.4

To ascertain whether ovary affects directly on the function of adrenal gland without the cooperation of hypophysis, rats were hypophysectomized and weight of adrenal gland, thickness of various zona of adrenal gland and histopathological changes were compared with those of control group during the period from 1 to 56 days. The results were summarized as follows; 1. No significant difference of adrenal gland weight was observed between hypophysectomized group and hypophysectomized and hexestrol administered group, but the adrenal gland weight of both experimental groups reduced consistently after hypophysectomy and high significant difference (P$lt;0.01) was observed compared with normal group from 7th day. 2. No significant alternation of the proportional size of adrenal zona was observed between hypophysectomized group and hypophysectomized and hexestrol administered group, but the marked atrophy of zona fasciculata and reticularis of both groups were found, and it showed significant difference (P$lt;0.05) from 7th day and high significant difference (P$lt;0.01) from 14th day whereas no difference of zona glomerulesa was observed between compared groups. 3. There was no difference of histopathological changes of gonad between hypophysectomized group and hypophysectomized and hexestrol administered group, but no atrophy of zona fasciculata and reticularis was found in experimental groups whereas zona glomerulesa and adrenal medulla was not altered compared with these of control group. These results indicate that ovary does not affect directly on the development of adrenal gland, but cooperate with the hypophysis.

Hexestrol의 투여(投與)가 하수체척출(下垂體剔出) 암흰쥐의 혈청성분(血淸成分)에 미치는 영향(影響)

이규승,권해병,Lee, Kyu Seung,Kwon, Hae Byung 충남대학교 농업과학연구소 1978 Korean Journal of Agricultural Science Vol.5 No.2

난소(卵巢)의 분필기능(分泌機能)이 하수체(下垂體)의 조절기능(調節機能)없이 혈청성분(血淸成分)에 직접적(直接的)인 영향(影響)을 미치는가를 구명(究明)하기 위하여 암흰쥐에서 하수체(下垂體)를 척출(剔出)하고 마리당 6.0mg씩의 hexestrol을 투여(投與)한 후 혈청(血淸)중의 총지방(總脂肪), Cholesterol, 총단백질(總蛋白質), Non-protein nitrogen, Na, Cl 및 K의 변화를 처리(處理) 8주후(週後)까지 조사(調査)하여 비교검토(比較檢討)한 바 다음과 같은 결론(結論)을 얻었다. 1. 총지방(總脂肪)과 cholesterol의 양(量)은 대조군(對照群)에 비하면 2주후(週後)부터 유의성(有意性)이 인정(認定)되는 증가(增加)를 하였는데, 하수체척출군(下垂體剔出群)과 하수체척출후(下垂體剔出後) hexestrol 투여군간(投與群間)에는 유의성(有意性)이 인정9認定)되지 않았다. 2. 총단백질(總蛋白質)과 Non-protein nitrogen의 함량변화(變化)는 동일(同一)한 경향(傾向)으로서 시간(時間)이 경과(經過)함에 따라 점증(漸增)하였는데, 대조군(對照群)에 대하여 처리(處理) 4주후(週後)부터 유의성(有意性)이 인정(認定)되었고, 하수체척출군(下垂體剔出群)과 하수체척출후(下垂體剔出後) hexestrol 투여군간(投與群間)에는 유의성(有意性)은 인정(認定)되지 않았으나 하수체척출군(下垂體剔出群)에서 높은 값을 나타냈다. 3. Na, Cl 및 K의 함량(含量)은 일정(一定)한 변화경향(變化傾向)없이 근소하게 증감(增減)하여 전(全) 실험기간(實驗期間)에 걸쳐서 비교군간(比較群間)에 유의성(有意性)을 인정(認定)할 수 없었다. 4. 하수체척출(下垂體剔出) 암흰쥐에 있어서 hexestrol의 투여(投與)는 단백질대사(蛋白質代謝)에는 약간의 영향(影響)을 미치나, 지질(脂質) 및 무기물(無機物)의 대사(代謝)에는 영향(影響)을 미치지 못한다고 생각된다. This study was made to investigate whether there would be any direct relationship between ovary and serum components without the control mechanism from the hypophysis. After the administration of hexestrol (6.0mg/head) to the hypophysectomized female rats, the serum components such as total lipid, cholesterol, total protein, non-protein nitrogen, Na, Cl, and K were measured for 8 weeks after treatments. The results were obtained as follows; 1. The contents of total lipid and cholesterol for the treatment groups were increased significantly as compared with the control group at the 2nd week and there on. However, there were no ditferences between the hypophysectomized and the hexestrol treated-hypophysectomized groups. 2. The contents of total protein and non-protein nitrogen for the hypophysectomized and the hexestrol treated-hypophysectomized groups were gradually increased as the time passed in comparison with the control group. The differences between the control group and the treatment groups were significant at the 4th week and there on, and the differences between the hypophysectomized and the hexestrol treated-hypophysectomized groups were insignificant, but the hypophysectomized group had slightly high value. 3. For the contents of Na, Cl, and K, there was not any unique change but only a slight flactuation in its level, and the differences were thus statistically insignificant in all cases. 4. In the hypophysectomized famale rats, administration of hexestrol had a litlle effect on the metabolism of protein, but on the other hand, no effect of those of lipid and minerals.