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      • KCI등재후보

        가성 장폐쇄로 발현한 부신경절종 1 예

        김용태,이기업,박건춘,송영기,이문호,유은실,이준호,진태선 대한내과학회 1991 대한내과학회지 Vol.40 No.5

        Phenochromocytoma is a catecholamine-secreting tumor, most of which grow at the adrenal gland. About 109p Of pheochromocytomas are detected at the extra-adrenal chromaffine tissues and are called paraganglioma. The main symptoms of pheochromacytoma include hypertension, headache, palpitation, and sweating. Gastrointestinal symptoms such as abdominal pain, constipation, and vomiting are found in 20∼40% of patients with pheochromocytoma, but these are usually overlooked because of the severe, prominant cardiovascular symptoms. Intestinal pseudo-obstruction without hypertension in pheochromocytoma is very rarely found. It is caused by the decreased motility of the intestine and the over-contraction of the intestinal sphincter, which are caused by the unbalanced activation of α-and β-adrenal receptors. It can be hypothesized that catecholamine receptors in the cardiovascular system are down-regulated or desensitized, but those in the intestine remain intact. We report herein a case of pheochromocytoma in which intestinal pseudo-obstruction was the main presenting clinical manifestation. Symptoms of intestinal pseudo-obstruction were completely relieved by administration of phenoxybenzamine, an α-receptor blocker, and excisional surgery.

      • KCI등재후보

        상보형 일렉트로크로믹 소자의 제조 및 특성(1)

        김영호,이석윤,서동규,조동율,천희곤 한국센서학회 1997 센서학회지 Vol.6 No.1

        In this study, two different types of complementary electrochromic devices using amorphous WO₃ films as a working electrode, V₂O_5 film and NiO film as counter electrodes respectively were investigated. For the devices using amorphous and crystalline V₂O_5 films of 100∼150nm thickness with ITO/WO₃/LiClO₄-PC/V₂O_5 /ITO structure, an optical modulation of 50∼60% were obtained at a potential range of 1 2V. It has been shown that transmittance and reflectance of light could be electrically controlled by low applied voltage. For the devices with ITO/WO₃/LiClO₄-PC/NiO/ITO structure in which NiO film was deposited by a RF reactive sputtering, the optical modulation in visible light region (λ=550nm) and in near infrared light region (λ.1=850nm) were 25% and 30%, respectively.

      • SCOPUSKCI등재
      • 해외 부존 사료자원의 개발 및 이용성 연구 : 2 . 해외 부존 사료자원의 광물질과 항영양인자 분석 결과

        이성실,김홍대,하종규,곽병오,한인규,고영곤,감동근,전현식,박장희 한국영양사료학회 1998 韓國營養飼料學會誌 Vol.22 No.5

        본 연구는 해외 부존자원의 개발을 위하여 동남아시아 5개국과 중국에서 수집한 시료의 광물질, 중금속 및 항영양 인자 수준을 분석하여 원료가치를 판단하는 기초 자료를 제공하고자 실시되었다. 성분 분석 결과를 요약하면, 1. 본 시험에 공시한 부존사료자원들의 광물질 함량은 현재 우리나라에서 사용중인 원료사료와 비교 하였을 때 그 수준이 비슷하거나 높았다. 2. Bio-v-pro (India)에서 크롬 함량이 높게 나타났고, 대두박 (China)에서 납 함량이 높게 나타난 것을 제외하고는 대부분의 부존 사료자원의 중금속 함량은 안정권내에 있었다. 3. Cassava waste (Thailand)에서 HCN의 함량이 높게 나타났고, mustard cake (India)에서 tannic aicd 함량이 비교적 높게 나타난 것을 제외하고는, 아플라톡신, gossypol, nitrate 등을 포함하는 항영양성 인자들의 함량이 대부분의 부존사료자원들에서 낮은 것으로 조사되었다. This study was conducted to evaluate nutritional value of non-conventional feeds of foreign-origin. Samples collected from South-Asian countries and China were analyzed for minerals, heavy metals and anti-nutritional factors. 1. Most non-conventional feed resources obtained from 6 countries was similar or higher mineral contents in some cases than conventional feeds which used in Korea. Particularly, calcium and phosphorus were high in bone meal and fish meal from Vietnam. 2. Heavy metal contents of most non-conventional feed resources in this study was below safety level. But exceptions were bio-v-pro (India) containing higher chrome and soybean meal (China) containing higher Pb than in conventional feeds. 3. HCN was high in cassava waste (Thailand), and tannic acid was high in mustard cake (India). But in most non-conventional feed resources, the level of anti- nutritional factors was low enough to be used as feed resources.

      • KCI등재

        고 규소강에서 규칙상 소멸조건에 관한 연구

        이택동,유지형,신제식,배준수,이진형,이혁모 대한금속재료학회(대한금속학회) 2001 대한금속·재료학회지 Vol.39 No.4

        The ordered phase was tried to disappear in 6.5% Si steel to reduce the power loss and enhance the economic interests. They were prepared by the conventional casting or spray forming method, and they were investigated using the transmission electron microscopy(TEM). The variation in the methods of preparing the specimen did not result in any difference in suppressing the ordered B2 phase in the Fe-Si binary system. It was almost impossible to suppress this ordered phase keeping the silicon level as high as 6.5% even after the heat treatment at 1000℃ for 24 hr or after hot rolling. It was necessary to change the silicon level and control the cooling rate to prevent the ordering reaction, especially, in cooling after heat treatments. The silicon level of 5.8% was obtained as a maximum desirable value.

      • SCOPUSKCI등재
      • 조농비율 및 조사료의 종류가 한우 반추위내 발효성상 및 METHANE 생성에 미치는 영향

        이상철,이현정,김진욱,김건중,김용국,오영균,은정식 한국영양사료학회 1999 韓國營養飼料學會誌 Vol.23 No.5

        본 시험은 반추위 발효성상과 methane 생성에 조농비율과 조사료원의 영향을 측정하기 위하여 발효조 실험과 호흡챔버 실험을 실시한 바 얻어진 결과는 다음과 같다. 1. 실험 1, 즉 발효조 실험에서는 조사료원으로 볏짚 또는 건초를 사용하였고 조농비율을 1:3, 5:5와 3:7로 실시하였다. 반추위 pH와 총휘발성지방산 함량은 볏짚과 건초구 공히 농후사료의 비율이 증가할수록 낮게 나타났으며, acetic과 propionic acid의 비율인 A/P비는 볏짚구에서는 조사료의 양과 비례하여 증가하였으나 건초구에서는 조농비율에 따른 차이를 보이지 않았다. 한편, 반추위내 암모니아 농도는 볏짚구에서 농후사료의 양과 비례하여 증가하였으나(P<0.05), 건초구에서는 차이를 보이지 않았다. Methane 발생량은 볏짚구와 건초구 모두 농후사료의 양이 증가할수록 높게 나타났으며(P<0.05), 볏짚구에 비례하여 건초구에서 높게 나타났다(P<0.05). 2. 실험 2(호흡챔버실험)에서는 조사료원을 실험 1과 같이 볏짚과 건초를 사용하였으나 조농비율을 7:3과 3:7로 하여 실시하였다. 총 휘발성지방산 함량과 A/P비는 볏짚구와 건초구 모두 농후사료의 양이 증가할수록 높게 나타났다. Methane 발생량은 농후사료의 양과 비례하여 증가하였고(P<0.05), 조사료원에 따른 차이는 보이지 않았다. Two experiments were conducted to examine the effects of roughage to concentrate ratio and roughage source on ruminal characteristics and methane production. In experiment 1 (fermenter experiment), roughage sources used were rice straw and grass hay, and roughage to concentrate ratio were 7:3, 5:5 and 3:7. pH was declined (P<0.05) by increasing concentrates ratio regardless of roughage types. Increasing the percentage of concentrates tended to increase (P<0.1) total volatile fatty acids (VFA) and this change was remarkble at 5 hr. or fermentation time, especially. But there were no difference between roughage types in total VFA. Acetic to propionic acid ratio (A/P) was decreased proportional to concentrates percentage in rice straw, but not in grass hay. Ammonia concentration tended to increase with concentrates ratio in rice straw increased, and to increase with hay percentage increased in grass hay treatment (P<0.05). Methane production was increased (P<0.05) with concentrates ratio increased in both roughage types and tended to be high in grass hay compared with rice straw at 5 and 7 hr. fermentation times. In experiment 2 (respiratory chamber experiment), roughage sources used were rice straw and grass hay, and roughage to concentrate ratio were 7:3 and 3:7. Increasing the percentage of concentrates resulted in higher total VFA yield regardless of roughage types. A/P ratio was decreased proportional to concentrates percentage in both roughage types. Methane production was increased (P<0.05) with concentrates ratio increased in both roughage types and tended to be high (P<0.1) in grass hay compared with rice straw at 5 and 7 hr fermentation time. Conclusively methane production was increased with a rise of concentrate percentage and tended to be higher (P<0.1) in grass hay than rice straw in both experiments.

      • KCI등재

        지하철의 사상사고 및 운전장애 분석에 관한 연구

        이동훈,목연수,장성록,권혁무,윤원영,옥영석,최용석,배동철 한국산업안전학회 1999 한국안전학회지 Vol.14 No.3

        The purpose of this study is to analyze death injuries and operation troubles of urban transit. No difference was shown in death rates between Line 1 of Pusan urban transit and Line 5, 7, and 8 of Seoul metropolitan transit. And relief time by another train did not depend upon the number of crews. We concluded that thorough inspection and preventive maintenance of trains and facilities are necessary for safe and timely service of urban transit.

      • KCI등재후보

        한국에서의 Human T-Cell Leukemia Virus Type-1(HTLV-1)에 대한 혈청학적 및 역학에 관한 연구

        이영열,이성열,김은실,이홍복,김병국,이문호,박선양,김노경,서철원,규경채,최강원,조한익,고월청,야마구찌이찌세이 대한내과학회 1986 대한내과학회지 Vol.31 No.2

        Type-C retrovirus, human T-cell leukemia virus type-l(HTLV-1), has been shown to be associated etiologically with adult T-cell leukemia, which is an endemic disease in southwestern parts of Japan. We examined the seroepidemiological characteristics of antibody to adult T-cell leukemia virus associated antigen (anti-ATLA-antibody) by the indirect immunofluorescent assay and ELISA from the healthy individuals and various diseased patients in the Republic of Korea, a country adjacent to Japan in which HTLV-1 is endemic. The results were as follows. 24 out of 9,603 individuals(0.25%) were seropiositive. The positve rate was 0.17% in males and 0.36% in females, the sex difference was female predominent relatively. HTLV-1 carriers were found 16 individuals in Seoul, 5 in Kyonggi area, 1 in Chungnam and Jonbuk, respectively, but found only 1 individual in Busan city and Jaejoo area close to southwestern parts of Japan. Positive rate to anti-ATLA-antibody seemed to be high in older age, especially at the 50s(0. 4Yo). In conclusion the prevalence rate of anti-ATLA- antibody seemed to be very low in the Republic of Korea adjacent to Japan in which HTLV-1 is endemic and no patient with adult T-cell leukemia has been found as yet. Also we noted that the Republic of Korea is not an endemic area to HTLV-1.

      • KCI등재후보

        다이프로피온산 베클로메타손과 부데소니드의 투여 용량에 따른 코르티솔 농도와 변화

        이영승,김종구,이양근,최수미,송하숙,이용철 대한내과학회 1993 대한내과학회지 Vol.45 No.6

        Background: Topical inhaled steroids, budesonide (Bu) and beclomethasone dipropionate (BDP) is now established in the management of chronic: asthma. These have high topical anti-inflammatory activity but low systemic activity. This study was performed to determine the effects of two inhaled corticosteroids, Bu and BDP, on the adrenocortical supression in thirty patients, eighteen chronic obstructive pumonary diseases and twelve bronchial asthma (aged 33-76 years). Methods: The adrenocortical function was assessed by measurement of plasma cortisol concentration at 8 o' clock in morning and free cortisol in 24-hour urine collection at interval, No steroid was taken during the pretreatment period of 10 days, thereafter each subject inhaled Bu or BDP aerosol, in daily doses of 800 or 1,600 micrograms for 12 days. The dose was delieved by metered dose inhaler (MDI) or diskhaler. No steroid was taken during the final 6 days of the study. Results: The plasma cortisol and 24-hour urinary free cortisol were decreased during the treatment period in patients inhaled Bu in daily doses of 800 and 1,600 micrograms. In contrast, plasma cortisol was decreased on the 12th day of treatment period in patients inhaled RDP, in daily doses of 800 micrograms (P less than 0.05). The plasma cortisol and 24-hour urinary free cortisol were decreased (P less than 0.05) on the 9 and 12 th day of treatment period in patients inhaled BDP in daily doses of 1,600 micrograms. Conclusion: These results suggested that suppression of the endogenous cortisol secretion occurs at inhaled budesonide and beclomethasone dipropionate is less suppressed on the adrenocortical function than budesonide in dose dependent fashion during the early periods,

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