소양호에서의 질화작용

이옥재,강은숙,곽노태,안태영 ( Ok Jae Rhee,Eun Sook Kang,No Tae Kwag,Tae Young Ahn ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.1

The nitrification rate and environmental factors were estimated 10 times from August 1992 to October 1993 in Lake Soyang. The number of nitrifying bacteria and nitrification rate were measured with MPN and ^14C-dark incorporation method, respectively. The distribution of ammonia-oxidizing bacteria was 0.5-220MPNml^-1 (mean, 11MPNml^-1) and that of nitrite-oxidizing bacteria was 0.5-92MPNml^-1(mean, 9MPNml^-1). The range of nitrification was estimated 0.01-2.25㎍-Nl^-1day^-1(mean,0.28㎍-Nl^-1day^-1). It was shown through multiple regression analysis from all data that the major factor affecting to nitrification rate was water temperature and the minor factor was pH. The distribution of nitrification rate and ammonia-oxidizing bacteria were not correlated.

구겨진 逃避

이옥재 덕성여자대학 1974 운현 Vol.5 No.1

소양호에서 질화작용활성도의 일 변화

이옥재,안태영 단국대학교 1997 論文集 Vol.31 No.-

Ammonia oxidizing bacteria associated with the nitrification activity were 144 to 1,860 MPN/100㎖ (mean : 755 MPN/100㎖) in April, 300 to 9,200 MPN/100㎖ (mean : 2,062 MPN/100㎖) in June and 220 to 1,060 MPN/100㎖(mean : 520 MPN/100㎖) in August. Nitrite oxidizing bacteria which were also relative to the nitrification activity were 122 to 780 MPN/100㎖ (mean : 361 MPN/100㎖) in April, 200 to 22,000 MPN/100㎖ (mean : 3,792 MPN/100㎖) in August. The value of ammonia and nitrite oxidizing bacteria was significantly high in June. The range of nitrification activity showed that 0.01∼0.85 ㎍-N/ℓ/day (mean : 0.13 ㎍-N/ℓ/day) in April, 0.18∼1.8 ㎍-N/ℓ/day (mean : 0.78 ㎍-N/ℓ/day) in June and 0.05∼1.14 ㎍-N/ℓ/day (mean : 0.56 ㎍-N/ℓ/day) in August, respectively. Diurnal variation of the nitrification activity was correlated with water temperature(r=0.537, p〈0.05), ammonia-N(r=0.379, p〈0.05) and chlorophyll-a(r=0.399, p〈0.05), respectively.

Helicobacter pylori 양성인 소화성 궤양 환자에서 Pantoprazole의 궤양 치유효과 및 Pantoprazole 포함 삼제요법의 제균효과

이옥재,정을조 대한화학요법학회 2001 대한화학요법학회지 Vol.19 No.2

목적 : H. pylori는 소화성 궤양의 중요한 원인인자로서 H. pylori의 박멸은 소화성 궤양의 치료에 있어서 가장 중요한 요소로서 추천을 하고 있다. H. pylori 양성인 소화성 궤양 환자를 대상으로 pantoprazole의 소화성 궤양에 대한 치유 효과와, pantoprazole, amoxicillin, clarithromycin 삼제요법의 H. pylori에 대한 제균효과 및 이에 영향을 주는 인자를 알아보고자 하였다. 대상 및 방법 : H. pylori 양성인 소화성 궤양 환자 24예를 대상으로 pantoprazole 하루 40 ㎎, 투여 및 pantoprazole 40 ㎎, amoxicillin 1000 ㎎, clarithromycin 500 ㎎ 하루 2회 1주간 투여 후, 궤양의 치유 및 H. pylori 제균율을 전향적으로 분석하였다. 결과 : 1. 소화성 궤양의 치유율은 연구를 완료한 활동성 궤양 환자 17예에서 5주 치료 후에 76.5%이었으며, 8주 치료 후에 94.1%이었다. 2. H. pylori 제균율은 ITT분석에서는 66.67%이었고, PP 분석에서는 76.19%이었다. 궤양의 위치에 따른 제균율은 십이지장 또는 십이지장 및 위궤양군에서 83.33% (ITT), 100% (PP)로 위궤양군의 50% (ITT), 54.55% (PP)보다 우수하였다(각각 p=0.0164(ITT), p=0.001(PP)). 흡연, 삼제요법·선행, 궤양의 재발, 출혈 동반 여부에 따른 제균율에는 유의한 차이가 없었다. 3. pantoprazole 단독 투여 중에는 부작용이 없었고 삼제용법 중에 약 16.7%에서 경한 일과성 부작용을 호소하였으나 이로인하여 약물투여를 중단한 예는 없었다. 결론 : Pantoprazole은 소화성 궤양의 치료에 있어서 우수한 효과를 나타내었다. pantoprazole, amoxicillin, clarithromycin 삼제용법의 H. pylori 제균율은 76.19%이었으며, 위궤양에 비하여 십이지장 궤양에서 제균효과가 매우 우수하였다. 제균효과에 영향을 주는 다른 변수는 관찰할 수 없었다. Background : proton pump inhibitor-based triple therapies are effective for Helicobacter pylori(H. pylori) eradication. We studied the ulcer healing effect of pantoprazole and the effect of pantoprazole-based triple therapy according to clinical variables in eradicating H. pylori. Methods : 24 patients with H. pylori-positive peptic ulcer received pantoprazole 40 ㎎, amoxicillin 1000 ㎎, and clarithromycin 500 ㎎, twice daily for a week and took pantoprazole 40㎎/day till complete healing of ulcer confimed by gastroduodenoscopy. The status of H.pylori infection was assessed at least 4 weeks after completion of medication by rapid urease test, histology and ^(13)C urea breath test. Result : The ulcer healing rates were 76.5% at 5th week and 94.1% at 8th week. H. pylori eradication rates were 66.67% on intention to treat (ITT) analysis and 76.19% on per protocol (PP) analysis. The H. pylori eradication rates of pantoprazole-based triple therapy were 83.33% on ITT and 100% on PP analysis in patients with duodenal or duodenal/gastric ulcers, and 50% on ITT and 54.55% on PP in those with gastric ulcers (p=0.0164 (ITT), p=0.001 (PP)). However, there was no significant difference in eradication rates according to smoking, protocol, recurrence of ulcer, and hemorrhage. There was no serious side effect despite mild adverse events in 16.7% of the patients during triple therapy. Conclusions : Pantoprazole was effective for healing of peptic ulcer. Pantoprazole-based triple therapy resulted in 76.2% of H. pylori-eradication rate, and was more effective for duodenal ulcers than gastric ulcers. There was no other clinical factor affecting eradication rate.

ATM 멀티캐스트 스위치에서 복사 네트워크의 셀 분배 알고리즘

이옥재,전병실,Lee, Ok-Jae,Chon, Byoung-Sil 대한전자공학회 1998 電子工學會論文誌, S Vol.s35 No.8

본 논문에서는 복사 네트워크의 멀티캐스트 셀을 적절하게 분배할 수 있는 새로운 분배 알고리즘을 제안한다. 합산기, 분배기, 가상 주소 부호기, 방송 네트워크가 이원적으로 구성된 복사 네트워크는 제안된 분배 알고리즘에 의하여 낮은 번지와 높은 번지가 양분되어 동시에 동작하기 때문에 입력된 셀이 균등하게 처리되어 셀 지연율과 입력 공정성이 개선되고 복잡도가 감소된다. 또한 방송 네트워크로 이진 트리와 Banyan 네트워크로 구성된 확장 Banyan 네트워크를 사용하여 오버플로우 발생 확률을 1/2로 감소 시킨다. 분석 결과 제안된 알고리즘은 입력 버퍼에서 셀 지연율이 확연하게 감소됨을 알 수 있었다. In this paper, a new algorithm is proposed which distributes multicast cells in a copy network. The dual copy network is composed of running adder network, distributor, dummy address encoder, and broadcasting network. It is operated lower input address and higher one simultaneously by the distribution algorithm. As a result, for each input has a better equal opportunity of processing, cell delay and hardware complexity are reduced in copy network. Also, for it adopts the broadcasting network from an expansion Banyan network with binary tree and Banyan network, overflow probability is reduced to a half in that network. As a result of computer simulation, the copy network processed by the distribution algorithm is remarkably improved in cell delay of input buffer according to all input loads.

간질환 없이 고암모니아혈증을 보인 선천성 하부 장간막-신정맥 단락 1 예

이옥재,박현주,김영채,조한래,손미정,김정렬,원용한 대한내과학회 1995 대한내과학회지 Vol.49 No.6

An inferior mesenteric-caval shunt through the left renal vein is very rare and cause hyperammonemia. Although the accurate cause of this shunt remains unknown, it is considerd as a congenital malformation or seguellae of abdominal surgery. Accordingly, congenital inferior mesenteric-caval shunt needs to be considered in the differential diagnosis of hyperammonemia, particularly when liver disease or portal hypertension are excluded. Recently, we experienced a case of congenital inferior mesenteric-caval shunt through the left renal vein presenting symptomatic hyperammonemia without liver disease in a 61 years old woman. The onset of symptoms has been correlated with a sharp rise in the levels of ammonia in the peripheral blood.

간의 원발성 혈관육종

이옥재,심정우,김기홍,김현진,정기문 大韓消化器病學會 1997 大韓消化器病學會誌 Vol.30 No.2

췌장 가성낭종의 치료 : D'Egidio 및 Schein 분류에 따른 치료

이옥재,김영채 大韓消化器病學會 1996 大韓消化器病學會誌 Vol.28 No.5

고혈압 환자에서 도플러 심초음파를 이용한 좌심실 이완기기능에 관한 연구

이옥재,신길자 梨花女子大學校 醫科大學 醫科學硏究所 1990 EMJ (Ewha medical journal) Vol.13 No.3

It is well known that the diastolic dysfunction of the left ventricle plays an important ole in the pathophysiology of heart failure in the various cardiac diseas. And many hypertensive patinents manifest diastolic dysfunction of the left ventricle in its early stage. Thus, early detection of left ventricular diastolic dysfunction has clinical importance in management and prognosis of hypertensive heart disease. For the evaluation of the left ventricular diastolic function in the hypertensive patients, 30 normotensive control subject and 30 untreated essential hypertensive patients were studied by pulsed Doppler echocardiography at the left ventricular inflow, and then E/A velocity ratio [E/A (v)], early diastolic deceleration time(EDDT), and late diastolic time(LDT) were measured after confirming normal ejection fraction by M-mode echocardiography. The hypertensive patients were subgrouped according to the level of the diastolic pressure(Group A : mild, Group B: moderate, Group C: severe) and the each parameters of different groups were compared with those of the normal control group. The result were as follows : 1) In the 30 noraml control group. ejection fraction was 69.4±4.6% and in the 30 hypertensive patients group, it was 66.7±5.3%. There was no significant differences between the normal control and the hypertensive patients group. 2) In the normal control group, E/A (v) was 1.54±0.32, EDDT was 147±13.4msec, LDT was 159±14.8 msec, and in all hypertensive patients group, mean E/A (v) was 0.80±0.38, mean EDDT was 165±19.4 msec, mean LDT was 149±14.9 msec. E/A (v) was significantly decreased(P<0.005) and EDDT was prolonged(P<0.025), compared with those of the normal control group, but there was no significant difference in LDT. 3) In Group A, E/A (v) was significantly decreased(0.98±0.36, P<0.005), compared with those of the normal control group, but there was no significant difference in EDDT(155±18.5 msec). 4) In Group B, E/A (v) was markedly decreased(0.76±0.45, P<0.005), and EDDT was significantly prolonged(170±24.8 msec, P<0.025), compared with those of the normal control group. 5) In Group C, E/A (v) was significantly decreased(0.66±0.32, P<0.005), and EDDT was prolonged(171±21.3 msec, P<0.01), compared with those of the normal control group. Above results suggest that diastolic dysfunction of the left ventricle can precede the systolic dysfunction and clinical deterioration even in the mild hypertensive patients, and pulsed Doppler echocardiographic diastolic indices such as E/A (v) and EDDT play an important role in the early detection of the left ventricular diastolic dysfunction in the hypertensive patients.

간농양의 임상적 고찰

이옥재,김영채 大韓消化器病學會 1994 大韓消化器病學會誌 Vol.26 No.3