• Journal of Gastric Cancer
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• 제10권1호
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• pp.1-4
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• 2010

목적: 위점막 이형성증은 "위선암과 연관이 있거나 침습성 위선암으로 발전할 가능성이있는 명백한 종양성 상피"로정의되고 있으며 만성위염에서의 암 발생기전에서도 전암성 병변으로 여겨지고 있다. 이에 저자들은 내시경 겸자 생검에서 위점막 이형성증으로 진단된 환자에 대한 적절 한 치료방침을 결정하고자 본 연구를 시행하였다. 대상 및 방법: 2006년 1월부터 2008년 12월까지 3년 동안 내시경 겸자 생검으로 위점막 이형성증으로 진단받고 내시경 점막절제 또는 내시경 점막하 박리술을 시행한 148예를 대상으로 하였으며 내시경 겸자 생검 결과와 최종 조직병리 결과를 비교하였다. 결과: 148예의 환자 중 고도 이형성증 63예, 저도 이형성증 85예였으며 최종 병리 결과 위선암 49예(33.8%), 고도이형성증 40예(27.0%), 저도 이형성증 59예(39.9%)였다. 고도 이형성증으로 진단된 63예는 최종 조직병리 결과 위선암34예(54.0%), 고도 이형성증 20예(31.7%), 저도 이형성증 9예(14.3%)였으며 저도 이형성증으로 진단된 85예는 위선암 15예(17.6%), 고도이형성증 20예(23.5%), 저도이형성증 50예(58.8%)였다.결론: 내시경 겸자 생검 결과 위점막 이형성증으로 진단된 경우 고도 이형성증의 경우는 내시경을 이용한 점막절제 또는 점막하 박리술을 통한 절제술을 시행하고 저도이형성증의 경우 주기적인 감시 및 재생검 뿐 아니라 정확한 진단을 위한 내시경 점막절제 등이 고려되어야 할것이다.

• 한국압력기기공학회 논문집
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• 제4권2호
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• pp.1-6
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• 2008

Very High Temperature Gas Cooled Reactor (VHTR) has been selected as a high energy heat source for nuclear hydrogen generation. The VHTR can produce hydrogen from heat and water by using a thermo-chemical process or from heat, water, and natural gas by steam reformer technology. A co-axial double-tube primary hot gas duct (HGD) is a key component connecting the reactor pressure vessel and the intermediate heat exchanger (IHX) for the VHTR. In this study, a preliminary design analysis for the primary HGD of the nuclear hydrogen system was carried out. These preliminary design activities include a determination of the size, a strength evaluation and an appropriate material selection. The determination of the size was undertaken based on various engineering concepts, such as a constant flow velocity model, a constant flow rate model, a constant hydraulic head model, and finally a heat balanced model.

• Mycobiology
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• 제45권4호
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• pp.318-326
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• 2017

In a survey of undiscovered taxa in Korea, three zygomycete fungal strains-EML-W31, EML-HGD1-1, and EML-RUS1-1-were isolated from freshwater, grasshopper fecal, and soil samples in Korea. On the basis of the morphological characteristics and phylogenetic analysis of internal transcribed spacer and 28S rDNA, the isolates of EML-W31, EML-HGD1-1, and EML-RUS1-1 were confirmed to be Cunninghamella bertholletiae, Cunninghamella echinulata, and Cunninghamella elegans, respectively. These species have not been previously described in Korea.

• 에너지공학
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• 제11권2호
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• pp.136-141
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• 2002

석탄가스화 복합발전용 고온건식 탈황제의 반응성을 개선하기 위하여 $Al_2$O$_3$를 지지체로사용한 ZnO/Al$_2$O$_3$ 탈황제를 제조하고 반응특성을 조사하였다. ZnO/Al$_2$O$_3$의 성분함량 및 소성온도에 따른 물리화학적 구조변화를 XRD로 관찰하였고 ZnO의 소결 및 열화로 인한 활성저하를 $Al_2$O$_3$의 함량과 소성온도를 변화시켜 개선할 수 있음을 탈황 및 재생반응실험을 통하여 확인하였다. 마지막으로 첨가제를 함유한 ZnO/Al$_2$O$_3$ 탈황제의 내구성실험에 의한 고온건식 탈황제로의 사용가능성을 실험적으로 확인하였다.

• 사상체질의학회지
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• 제20권2호
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• pp.72-84
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• 2008

1. Objectives The purpose of this study was to observe the anti-oxidant effects of Hyangsayangyi-tang(HY) in SD rats. 2. Methods This experiment was used the tissue of stomach, spleen and pancreas cells of 6, 52 and 68 weeks old SD rats. Each age group was again divided into three groups. One group, as normal group, was not-treated cells, another group, as control group, was saline-treated cells, and the last group, as experimental group, was HY-treated cells. After culture for 48 hours, each groups measured the level of SOD, GSH, MDA and NO in the tissue of stomach, spleen and pancreas cells. 3. Results and Conclusions The activity of SOD were significantly increased in spleen cell of 52, 68 w-HY group, pancreas cell of 68 w-HY group and in stomach cell of 52, 68 w-HY group compared with those of the normal and the control groups. The level of GSH were significantly increased in spleen cell of 52, 68w-HY group and in pancreas cell of 68w-HY group compared with those of the normal and the control groups. The level of MDA were significantly decreased in pancreas cell of 68 w-HY group compared with those of the normal and the control groups. The level of NO were significantly decreased in spleen cell of 68 w-HY group, pancreas cell of 52, 68w-HGD groups compared with those of the control groups. According to results, HY showed anti-oxidant effect. Investigation into the clinical use of the HY is suggested for future research.

• Journal of Nutrition and Health
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• 제33권5호
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• pp.532-539
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• 2000

The purpose of this research is to assess th iron nutritional status of pregnant women and to evaluate the appropriateness of the present cut off levels of hemoglobin(Hgb), hematocrit(Hct) and total iron binding capacity(TIBC) for assessing iron deficiency status. Pregnant women who were visiting public helath centers in Ulsan were interviewed and agreed to attend the study. Blood sample was taken and biochemical analysis of blood was performed. The collected data were classified into 3 trimesters by gestational age and then statistical analysis was performed. The prevalence of anemia in all subjects was 32.3% by WHO criteria(Hgb < 11.0g/dl) and 17.8% of all subjects was iron deficient anemia by CDC criteria(Hgb < 11.0/dl and serum ferritin < 12.0ug/l). Since the iron deficient anemia generally occures at the last stage of iron deficiency, it is not efficient to diagnose and prevent the iron deficient anemia in pregnant women by using the present cut off level of Hgb. Therefore, the new cut off level of iron status indices is necessary for assessing iron deficiency in early pregnancy before manifestation of anemia and for reducing the prevalence of anemia in later pregnancy. For this reason, the present cut off levels of iron status indices were estimated and compared by assessing the iron deficiency judged by serum ferritin level (<12.0ug/l)as true iron deficiency. It follows from the results of this research that present cut off levels of Hgb, Hct and TIBC were very insensitive in identifying the subjection with iron deficiency. The appropriate cut off levels of Hgb were 11.5g/dl for total period of pregnancy, 12.0g/dl for 1st and 3rd trimester, and 11.5g/dl for 2nd trimester. The cut off level of Hct was 34.0% for total period for pregnancy, 35.0% for 1st trimester, and 34.0% for 2nd and 3rd trimester. The cut off level of TIBC was 400ug/dl for total period, 360ug/dl for 1st 2nd trimester, and 450ug/dl for 3rd trimester.

• The Plant Pathology Journal
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• 제35권2호
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• pp.172-177
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• 2019

A duplex PCR method was developed for simultaneous detection and identification of tobacco root rot pathogens Phytophthora nicotianae and Thielaviopsis basicola. The specific primers for P. nicotianae were developed based on its internal transcribed spacer (ITS) regions of ribosomal gene, ras gene and hgd gene, while the specific primers for T. basicola were designed based on its ITS regions and ${\beta}$-tubulin gene. The specificity of the primers was determined using isolates of P. nicotianae, T. basicola and control samples. The results showed that the target pathogens could be detected from diseased tobacco plants by a combination of the specific primers. The sensitivity limitation was $100fg/{\mu}l$ of pure genomic DNA of the pathogens. This new assay can be applied to screen out target pathogens rapidly and reliably in one PCR and will be an important tool for the identification and precise early prediction of these two destructive diseases of tobacco.

• Korean Chemical Engineering Research
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• 제50권3호
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• pp.492-498
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• 2012

본 연구에서는 고온고압 건식탈황장치를 이용하여 고체순환량과 탈황반응기 내의 공극률에 대한 수력학적특성을 파악하고, 아연계 탈황제의 고온고압 조건에서 탈황반응온도에 대한 반응특성 및 연속운전을 통한 탈황 효율을 분석하였다. 실험에 사용된 고온고압건식탈황장치는 고속유동층 형태의 탈황반응기(내경: 0.015 m, 높이: 6.2 m), 기포유동층 형태의 재생반응기(내경: 0.053 m, 높이: 1.6 m), 가스의 역흐름을 방지하는 loop-seal, 두 반응기 후단에 압력컨트롤밸브로 구성되어있다. 수력학 특성으로는 고체순환밸브 개구비, 탈황반응기 가스 유속, 탈황반응기 온도 변화에 따른 고체순환량과 각 조건에서의 고속유동층 형태의 탈황반응기 높이에 따른 공극률 분포를 알아보았다. 고체순환량은 동일한 유속조건, 동일한 고체순환밸브 개구비에서 탈황반응기 온도가 상온일 때보다 $300^{\circ}C$와 $550^{\circ}C$일 때 감소하였으며 $300^{\circ}C$와 $550^{\circ}C$ 조건에서는 큰 차이가 없었다. 탈황반응기내의 공극률은 고체순환밸브 개구비가 10~20%로 고체순환량이 적은 경우 고속유동층 형태의 공극률 분포를 보이고, 30~40%로 고체순환량이 많아지는 경우 탈황반응기 하부에서 turbulent 형태의 공극률의 분포를 나타냈다. 아연계 탈황제의 탈황반응온도에 따른 반응특성은 시스템 압력 20 atm, 연속 반응 조건에서 탈황 온도를 변화시키면서 살펴보았다. 일정한 고체순환 조건에서 탈황온도 $450^{\circ}C$ 이하에서 탈황 효율 저하가 시작되는 것을 확인하였으며, 높은 탈황 효율을 유지시키기 위하여 10시간 연속운전에서는 탈황 반응 온도를 $500^{\circ}C$로 설정하여 실험하였다. 실험 결과, 10시간 연속운전을 통해, 유입 $H_2S$ 농도 5,000 ppmv 조건에서 탈황 반응기 후단 $H_2S$ 농도는 UV분석기(Radas2)와 검지관(GASTEC)의 검출한계인 1 ppmv 이하를 유지하여 $H_2S$ 제거 효율 99.99% 이상을 달성하였다.