• 대한의생명과학회지
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• 제9권3호
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• pp.145-150
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• 2003

In the intestinal mucosa, mast cells are thought to be responsible for the expulsion of parasites. We investigated the relationship of worm expulsion and mast cells in C3H/HeN and BALB/c mice infected with Echinostoma hortense. In addition, we examined whether the worm recovery rate was associated with the strain of mice, and whether a toluidine stain and immunohistochemistry using the c-kit antibody was effective in the detection of mast cells. In order to investigate the mucosal immune response of C3H/HeN and BALB/c mice, each mouse was infected orally with 30 E. hortense metacercariae. Then, the number of mucosal mast cells and worm recovery rates was observed in experimentally infected mouse strains between 1 week and 8 weeks post infection (PI). Mucosal mast cells were increased in 3 weeks P.I. in C3H/HeN and BALB/c mice. On the other hand, only mucosal goblet cells and worm recovery rates correlated in C3H/HeN mice (P=0.0482). Worm recoveries in C3H/HeN mice were 65.7$\pm$5.6, 53.3$\pm$5.4 and 6.7$\pm$0.6 in week 1, 2, and 3 P.I. and strongly decreased in week 3 P.I. Worm recoveries in BALB/c mice were 23.0$\pm$2.5, 10.0$\pm$1.0, and 6.7$\pm$0.6% in week 1, 2, and 3 P.I. and gradually decreased from week 1 P.I. to week 3 P.I. Worm recoveries in C3H/HeN mice were significantly higher than in BALB/c mice (P<0.00l). The number of mast cells in C3H/HeN and BALB/c mice using the anti-c-kit antibody reached to a peak in week 3 P.I. and recovered as normal level in week 5 P.I. and 6 P.I. The number in E. hortense-infected C3H/HeN mice (P=0.0015) was higher than in E. hortense-infected BALB/c mice (P=0.01) compared with the control group. There were significant differences in the number of mast cells among regions of the intestine in in C3H/HeN mice (P<0.05) but not in BALB/c mice (P>0.05). Immunohistochemistry using the anti-c-kit antibody was significant method as an examination of the number of mast cells (P=0.0002). In conclusion, the present study demonstrated that mast cells play an important role in worm recovery, and immunohistochemistry using the anti-c-kit antibody was superior to toluidine stain as an examination of mast cells.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2002년도 추계학술발표대회 논문집
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• pp.193-197
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• 2002

Polyurethane casting wing fairings included in F-5E/F 15% spar kit are to be installed on aircraft wing surfaces and used for compensating the changes of the aerodynamic configuration by the leading edge extension fairings. These fairing are mandatory items in repairing wing areas and was imported from foreign supplier with long term delivery and high cost. Accordingly, local manufacturing is necessary to get rid of above disadvantages such as long term delivery and high cost. Basic properties test of specimen to be developed and part's requirements after localization was taken and its values were similar or higher when comparing with the original's even in low temp test at -55C. Casting mold process was used to manufacture the polyurethane fairings and its demensional stability ＆ physical condition was proper and met to the related specification and drawing's requirements

• Parasites, Hosts and Diseases
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• 제62권3호
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• pp.323-329
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• 2024

We developed a new concentration kit, called the ParaEgg (PE), for easy detection trematode eggs from fecal samples in endemic areas of clonorchiasis and metagonimiasis in Korea. To create a standard of detection efficiency, 120 fecal samples were examined using the water-ether concentration method (WECM). The PE kit and Mini ParaSep (PS) kit were used to compare the detection sensitivity of 100 egg-positive and 20 egg-negative samples in WECM. Additionally, stool samples, which were intentionally spiked with 10, 20, and 30 Clonorchis sinensis eggs, were evaluated to assess the sensitivity in low-infection cases. The PE and PS kits showed detection rates of 100% and 92%, respectively, from 100 egg-positive samples in WECM. Meanwhile, eggs were detected in 3 (PE) and 2 (PS) out of 20 egg-negative samples in WECM. The PE kit detected the highest number of eggs per gram of feces (727 on average), followed by the WECM (524) and PS kit (432). In fecal samples that were intentionally spiked with 10, 20, and 30 C. sinensis eggs, PE only detected eggs 2 out of 5 samples in 10 eggs spiked (40%), and the detection rates were 80% and 100%, respectively. The PE kit enabled a more accurate identification of trematode eggs because of the clearance of small fecal debris in the microscopic field. In conclusion, the PE kit is obviously helpful to detect and identify trematode eggs in stool examinations especially in endemic areas of clonorchiasis and metagonimiasis.

• Parasites, Hosts and Diseases
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• 제34권2호
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• pp.121-126
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• 1996

작은와포자충이 송아지에서 설사에 직접적으로 영향을 미치는지를 알아보고자 야외에서 설사를 발현하는 4개월 이하의 송아지 분변 총 201건를 수거하여 DMSO-modified acid fast 염색법 (MAFS), commercial kit(Meridian Diagnostics, Cincinnati, Ohio) 그리고 본 실험실에서 만 든 단세포군항체(C6)를 이용한 간접형광항체법(IFA)으로 작은와포자충의 검출을 시도하였다. 작 은와포자충의 검출은 MAFS에서 29건(14.4%) commercial kit와 IFA에서 각각 23건씩(11.4%) 검출되었다. 작은와포자충 오오시스트의 검출에 사응된 진단기법간의 진단일치율을 비교 하였던 바 msS를 기준으로 하였을 때 IFA는 민감도 69%. 특이성 98%였다. Commercial kit와 IFA진단법에서는 양성 22건, 음성 177건이 서로 일치하였으며. commercial kit를 기준으로 할 때 IFA의 민감도는 96%, 특이성 99% 고리고 진단일치에 대한 기대치는 99%였다. 따라서 본 실험에 사용된 IFA는 commercialkit와 일치율이 높아 진단목적으로 사용될 수 있을 것으로 생각된다. 한편, IFA에서 작은와포자충이 검출된 23건의 분변에 대해 분변 g당 작은와포자충 오오시스트의 수(OPG)를 측정하였다. 14건이 $10^3$ 이하의 OPG수준을 나타냈으나 $10^5$ 이상의 OPG도 4건이었다. 작은와포자충에 감염되어 설사가 발현될 때의 OPG의 수준이 $10^5$ 이상임을 감안해 보면, 이번 조사된 송아지 설사변 201건 중 4건(5%)은 작은와포자충에 의한 설사로 분석되었다. 이러한 결과를 종합해보면, 국내메서 발생되는 송아지 설사 원인중 약 5%는 설사와 관련되는 다른 원인체와 관계없이 작은와포자충 단독감염만으로도 임상적으로 설사가 발현되고 있는 것으로 판단되었다.

• 대한임상검사과학회지
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• 제43권2호
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• pp.48-56
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• 2011

Gastrointestinal stromal tumor (GIST) is a mesenchymal tumor and is associated with a specific immunophenotype index. It is very important to identify the specific immunophenotype and the diagnosis for the treatment GIST patients. Ninety two cases of GIST analyzed in this study were immuno-stained for c-kit, DOG1, CD34, PKC-${\theta}$, PDGFR-${\alpha}$. The rate of positive staining and statistical significance were then compared. In addition, the GISTs were analyzed as followings: very low risk, low risk, intermediate risk and high risk according to tumor size and nuclear division, and later correlated with clinical parameters. The results of the GIST positive stainings were: DOG1 (95.7%), PKC-${\theta}$ (90.2%), PDGFR-${\alpha}$ (88.0%), c-kit (87.0%) and CD34 (71.7%). Only DOG1 staining showed a statistical significance of p<0.05. It was identified in the classification system of histologic risk that staining expression of DOG1, PKC-${\theta}$, PDGFR-${\alpha}$ were significantly increased as histologic risk increases (p<0.05). However, clinical parameters such as age and sex of patients have no correlations with the classification system of histologic risk (p>0.05). Therefore, in this study, the expression of DOG1 showed statistical significance and DOG1, PKC-${\theta}$, PDGFR-${\alpha}$ staining increased significantly as the histologic risk increases in histologic classification system. Taken together, the DOG1 staining should be very effective for the diagnosis of GIST patients.

• Journal of Genetic Medicine
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• 제12권1호
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• pp.31-37
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• 2015

Purpose: We investigated the neurogenic potentials of amniotic fluid-derived stem cells (AFSCs) according to the expression levels of stem cell markers and ingredients in the neural induction media. Materials and Methods: Four samples of AFSCs with different levels of Oct-4 and c-kit expression were differentiated neurally, using three kinds of induction media containing retinoic acid (RA) and/or a mixture of 3-isobutyl-1-methylxanthine/indomethacin/insulin (neuromix), and examined by immunofluorescence and reverse transcription-polymerase chain reaction (RT-PCR) for their expression of neurospecific markers. Results: The cells in neuromix-containing media displayed small nuclei and long processes that were characteristic of neural cells. RT-PCR analysis revealed that the number of neural markers showing upregulation was greater in cells cultured in the neuromix-containing media than in those cultured in RA-only medium. Neurospecific gene expression was also higher in Oct-4 and c-kit double-positive cells than in c-kit-low or -negative cells. Conclusion: The stem cell marker c-kit (rather than Oct-4) and the ingredient neuromix (rather than RA) exert greater effects on neurogenesis of AFSCs.

• 한국재난정보학회 논문집
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• 제16권4호
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• pp.670-681
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• 2020

연구목적: 본 연구는 기존 지진현장경보 연구를 통해 단일 지진계에서 관측한 P파로부터 PGV 값을 예측하기 위한 예측식을 제시하고, 예측 결과를 현장경보에 이용하기 위한 기술적 접근 방안들을 도출하기 위한 것이다. 연구방법: 과거 4년간 규모 3,0 이상의 지진가운데 진도등급 II 이상의 데이터를 이용하여 P파로부터 PGV를 예측하기 위한 수식을 도출하고, 진원 정보 추정 없이 지진의 규모와 PGV의 크기를 상대적으로 비교하여 지진위험을 알려줄 수 있는 기술을 적용하였다. 연구결과: 개선한 PGV 예측식은 평균 94.8%의 정확도로 MMI를 추정하였고, 𝜏_c : Pd 방법 역시 로컬 지진위험을 경보하기 위한 유효한 성과를 보여주었다. 결론: 현장경보기술을 국내에 성공적으로 적용하였으며, 경보공백역을 약 14km 까지 줄일 수 있는 방안을 제시하였다.

• 동의생리병리학회지
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• 제22권4호
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• pp.778-790
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• 2008

This experiment investigated the effect of mixed extracts obtained from Mylabris phalerata Pall. and Drynariae Rhizoma on hair growth activity of the normal and spontaneous alopecia areata model of C57BL/6N mice for 16 days. First, we examined morphological regrowth of hair in normal and spontaneous alopecia model of C57BL/6N mice. Second, we examined immunoreactive density of vascular endothelial growth factor(VEGF), c-kit and protein kinase $C-{\alpha}(PKC-{\alpha})$ in skin of normal C57BL/6N mice by immunohistochemical methods. Third, we investigated expression of $TGF-{\beta}$, prolactin and placenta lactogen after topical application of mixed extracts of Mylabris phalerata Pall. and Drynariae Rhizoma to skin by RT-PCR. The results were as follows: Hair growth effect from middle and high concentration of mixed extracts of Mylabris phalerata Pall. and Drynariae Rhizoma was observed in 80% of normal mice in whose hair had been clipped in 15th days. Hair growth effect of all concentrations of mixed extracts of Mylabris phalerata Pall. and Drynariae Rhizoma was observed in 100% of spontaneous alopecia model of C57BL/6N mice in 15th days. Immunoreactive density of VEGF, c-kit and $PKC-{\alpha}$ in skin of all concentrations of mixed extracts of Mylabris phalerata Pall. and Drynariae Rhizoma were strongly stained in epidermis, bulge, secondary hair germ cells and cutaneous trunci m. compare to control group in 10th day. In experimental III group, Immunoreactive density of VEGF, c-kit and $PKC-{\alpha}$ in skin were strongly stained in inner and outer root sheath of skin. The treatment of mixed extracts of Mylabris phalerata Pall. and Drynariae Rhizoma increased the expression of $TGF-{\beta}$, placenta lactogen and prolactin in the skin of normal C57BL/6N mice compared to control group. These experiments suggest that mixed extracts of Mylabris phalerata Pall. and Drynariae Rhizoma may stimulate the topical hair growth activity and it can be useful for treatment of alopecia areata.

• 핵의학기술
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• 제15권1호
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• pp.101-105
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• 2011

목적 : Estradiol은 월경주기와 배란유도에 중요한 검사로 현재 전국의 핵의학 검사실에서 일반환자와 불임환자를 대상으로 검사가 시행되고 있으며 폐경은 진단하는데 난포자극호르몬(FSH)와 황체형성호르몬(LH)와 함께 중요한 검사이다. 전국 병원 중 핵의학 검체검사 외부정도관리에 참여하고 있는 기관은 70개 중에서 해당 검사를 측정하는 병원이 37개이며 이중 20개의 병원 즉 54%가 A사의 kit를 사용하고 있다. 이 중 A사 Kit의 검사 결과가 다른 kit와 다르게 높게 보고되어 이 현상에 대한 문제점을 파악하며, 더불어 폐경여성의 호르몬 치료에서 각 호르몬제를 복용했을 때, 이에 대한 영향을 알아보고자 한다. 실험재료 및 방법 : 2010년 4월부터 8월까지 본원에 의뢰된 Estradiol 검체 중 검사 결과가 약 100 pg/ml 이상인 75개의 검체를 대상으로 방사면역측정법(RIA) 검사인 A사 B사 C사 D사의 Kit와 화학발광측정법(CMIA)으로 검사를 하여 결과를 비교 하였다. 결과 : 각각의 제조회사의 Kit로 측정된 결과 갑의 평균값을 이용하여 구한 상관계수($R^2$)는 A사가 0.8906 B사가 0.9547 C사가 0.9527이고 D사의 상관계수도 0.873으로 좋은 상관관계를 보였으나 A사의 결과가 고농도일 때 B사 C사 D사 EIA 검사결과가 저 농도로 측정이 된 검체가 2건이 발견되었다. 결론 : 75개의 검체의 A사, B사, C사, D사와 CMIA법의 검사결과가 대부분 비슷한 경향으로 나왔으나 2건의 검체에서 아주 다른 결과가 보고 되었다. A사의 경우 700 pg/ml 이상의 높은 경우로 보고된 반면에 나머지 검사 결과에서는 10 pg/ml을 전후로 보고가 되었다. 두 검체의 공통점은 환자가 50대 이후의 폐경환자로 추정되고 암을 진단 받고 치료 중이며 FSH의 수치가 50 mIU/ml이상인 것으로 확인되었다. 정확한 원인은 규명하지 못했으나 환자가 폐경기의 나이이면서 난포자극호르몬의 수치가 폐경기의 평균치 일 때 Estradiol의 수치가 높다면 다시 한번 검사를 해보아야 될 것으로 사료된다. 추후 1차연구를 바탕으로 WHO 표준물질을 이용하여 키트별 회수율을 측정하여 정확도를 평가할 예정이다.

• 한국산업융합학회 논문집
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• 제9권1호
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• pp.51-59
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• 2006

The study is diagnosis about fatigue failure phenomenon of heating coil spring (sup9) and heat treatment method that is used to crusher. Because more than 80~90% of damage announcement of breakdown of machine and construction is been caused in fatigue present state, fatigue failure became important leading person at design. Calculated design load is imposed repeatedly that fatigue breakdown is safe. Is phenomenon that change load is imposed in the construction continuously. Used coil spring applies heat 30minute by Quenching temperature $860^{\circ}C$ if see manufacturing process and temperature of gasoline of $50^{\circ}C$ keep after quench that know tempering a $460^{\circ}C$ 90minute a product be. If doto apply heat $950^{\circ}C$ material at rolling process historically before quenching, austenite formation clay pipe being done AGS(Austenite Grain Size) by 2.5~4 become. Apply heat quenching 30minute by $820^{\circ}C$ by improvement method and after quench that keep $50^{\circ}C$ in oil tempering if do $450^{\circ}C$, 90minute spring ideal formation sorbite formation of the river form and condition that satisfy most more than AGS 7 appeared. Also, we can secure authoritativeness through MT since shot peening processing.