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왕덕현,이윤경,우정윤,허보영 한국공작기계학회 1998 한국생산제조학회지 Vol.7 No.1
Conductive metal matrix composite(MMC) material of 30% silicon carbide particulate based on aluminum matrix was machined by die sinking electrical discharge machining(EDM) process according to different current and duty factor for reverse polarity of electrode. Material removal rate(MRR) was examined by process under various operating conditions. The surface morphology was evaluated by surface roughness parameter and scanning electron microscopy(SEM) research. The MRR was suddenly increased over 11 ampere of current, and it was slightly changed over 0.3 of duty factor. The maximum surface roughness of EDMed surface was affected by the duty factor. The SEM photographs of EDMed surface showed wide recast distribution region of melting materials as increased of current and duty factor.
Hur, Bo Yun,Lee, Jeong Min,Lee, Jeong Eun,Park, Jae Yong,Kim, Soo Jin,Joo, Ijin,Shin, Cheong Il,Baek, Jee Hyun,Kim, Jung Hoon,Han, Joon Koo,Choi, Byung Ihn Wiley Subscription Services, Inc., A Wiley Company 2012 JOURNAL OF MAGNETIC RESONANCE IMAGING Vol.36 No.1
<P><B>Abstract</B></P><P><B>Purpose:</B></P><P>To determine the characteristic magnetic resonance imaging (MRI) features of mass‐forming autoimmune pancreatitis (AIP), which allow its differentiation from pancreatic adenocarcinoma (PAC).</P><P><B>Materials and Methods:</B></P><P>MR images of 37 patients with either pathologically proven, mass‐forming AIPs (<I>n</I> = 9) or PACs (<I>n</I> = 28) were retrospectively reviewed. The pancreatic MR protocol included unenhanced images, contrast‐enhanced dynamic images, diffusion‐weighted imaging (DWI), and MR‐cholangiopancreatography (MRCP). Two reviewers analyzed the MR images regarding the number, location, morphologic features, and enhancement degree and pattern of the lesions as well as secondary changes of the pancreatic parenchyma, the biliary and pancreatic ducts. The size and apparent diffusion coefficient (ADC) values of the lesions were measured.</P><P><B>Results:</B></P><P>Although sensitivities were low (28.6%–44.4%), specificities of multiplicity, capsule‐like rim enhancement, and skipped stricture of the biliary or pancreatic duct in mass‐forming AIP were high (100%). Sensitivities and specificities of irregular or geographic shape, delayed enhancement, and a low ADC value <1.26 × 10<SUP>−3</SUP> mm<SUP>2</SUP>/s in mass‐forming AIP were favorable (71.4%–83.3% and 78.5%–89.3%).</P><P><B>Conclusion:</B></P><P>Although to differentiate mass‐forming AIP from pancreatic cancer is difficult, the combination of MRI findings including contrast‐enhanced dynamic images, MRCP, and DWI can be a help. J. Magn. Reson. Imaging 2012;36:188–197. © 2012 Wiley Periodicals, Inc.</P>
Fine mapping of GRH3 conferring resistance to green rice leafhopper in rice (Oryza sativa L.)
Hur, Yeon-Jae,Cho, Jun Hyeon,Lee, Ji Yun,Sohn, Young-Bo,Park, Soo-Kwon,Lee, Bong-Choon,Cho, Jaemin,Kim, Sang Yeol,Song, You Chun,Park, Dong-Soo,Nam, Min-Hee,Lee, Jong Hee Springer-Verlag 2015 Molecular breeding Vol.35 No.3
Functional markers for bacterial blight resistance gene Xa3 in rice
Hur, Yeon Jae,Jeung, Ji-Ung,Kim, Sang Yeol,Park, Hyun-Soo,Cho, Jun-Hyun,Lee, Ji Yun,Sohn, Young-Bo,Song, You Chun,Park, Dong-Soo,Lee, Choon-Woo,Sohn, Jae Geun,Nam, Min-Hee,Lee, Jong Hee Springer-Verlag 2013 Molecular breeding Vol.31 No.4
The Distribution and Position of Fatty Acids in Glycerides Hydrolyzed from Fish Oil by Lipase
Hur, Byung Ki,Hu, Hong Bo,Yun, Hyun Shik 한국미생물 · 생명공학회 2000 Journal of microbiology and biotechnology Vol.10 No.4
In order to determine the position and the content of fatty acids attached to glycerides and the migration degree of fatty acids in the migration reaction, fish oil was hydrolyzed with lipolase-l00T which was derived from Aspergillus oryzae. The content of fatty acids in the glyceride mixture was analyzed and compared with that of fish oil. The amounts of fatty acid in a 2-position and the migration degree of the fatty acid in 2,3-DG (diglyceride) and 2-MG (monoglyceride) were carefully calculated. The results showed that approximately 95% (w/w) of DHA (docosahexaenoic acid) and 65% of EPA (eicosapentaenoic acid) were attached to the 2-position of glycerides in fish oil. Approximately 87% (w/w) of DHA and 75% of EPA remained in 2,3-DG, and 88% of DHA and 65% of EPA in 2MG were not involved in the migration reaction.
( Hyewon Hur ),( Young Han Kim ),( Hee Young Cho ),( Yong Won Park ),( Hye Sung Won ),( Mi Young Lee ),( Bo Hyon Yun ),( Kwang Hee Lee ),( Sung Yoon Kim ),( Junsang Yoo ),( Ja Young Kwon ) 대한산부인과학회 2015 Obstetrics & Gynecology Science Vol.58 No.4
Objective: To evaluate the feasibility of five-dimensional Long Bone (5D LB), a new technique that automatically archives, reconstructs images, and measures lengths of fetal long bones, to assess whether the direction of volume sweep influences fetal long bone measurements in three-dimensional (3D) ultrasound and 5D LB, and to compare measurements of fetal long bone lengths obtained with 5D LB and those obtained with conventional two-dimensional (2D) and manual 3D techniques. Methods: This prospective study included 39 singleton pregnancies at 26+0 to 32+0 weeks of gestation. Multiple pregnancies, fetuses with multiple congenital anomalies, and mothers with underlying medical diseases were excluded. Fetal long bones of the lower extremities-the femur, tibia, and fibula were measured by 2D and 3D ultrasound, and 5D LB, by an expert and non-expert examiner. First, we analyzed the 3D ultrasound and 5D LB data according to 2 different sweeping angles. We analyzed intra- and inter-observer variability and agreement between ultrasound techniques. Paired t-test, interclass correlation coefficient, and Bland-Altman plot and Passing-Bablok regression were used for statistical analysis. Results: There was no statistical difference between long bone measurements analyzed according to 2 different volume-sweeping angles by 3D ultrasound and 5D LB. Intra- and inter-observer variability were not significantly different among all 3 ultrasound techniques. Comparing 2D ultrasound and 5D LB, the interclass correlation coefficient for femur, tibia, and fibula was 0.91, 0.92, and 0.89, respectively. Conclusion: 5D LB is reproducible and comparable with conventional 2D and 3D ultrasound techniques for fetal long bone measurement.
Seok Yoon Son,Yun Seok Seo,Jeong Hee Yoon,Bo Yun Hur,Jae Seok Bae,Se Hyung Kim 대한영상의학회 2023 대한영상의학회지 Vol.84 No.6
Purpose To compare the diagnostic performance of rectal CT with that of high-resolution rectal MRI and histopathology in assessing rectal cancer. Materials and Methods Sixty-seven patients with rectal cancer who underwent rectal CT with rectal distension using sonographic gel and high-resolution MRI were enrolled in this study. The distance from the anal verge/anorectal junction, distance to the mesorectal fascia (MRF), extramural depth (EMD), extramesorectal lymph node (LN) involvement, extramural venous invasion (EMVI), and T/N stages in rectal CT/MRI were analyzed by two gastrointestinal radiologists. The CT findings of 20 patients who underwent radical surgery without concurrent chemoradiotherapy were compared using histopathology. Interclass correlations and kappa statistics were used. Results The distance from the anal verge/anorectal junction showed an excellent intraclass correlation between CT and MRI for both reviewers. For EMD, the distance to the MRF, presence of LNs, extramesorectal LN metastasis, EMVI, T stage, and intermodality kappa or weighted kappa values between CT and MRI showed excellent agreement. Among the 20 patients who underwent radical surgery, T staging, circumferential resection margin involvement, EMVI, and LN metastasis on rectal CT showed acceptable concordance rates with histopathology. Conclusion Dedicated rectal CT may be on par with rectal MRI in providing critical information to patients with rectal cancer.
종자피복기의 피복통 회전속도가 피복종자의 물리적 특성에 미치는 영향
허삼남(Sam Nam Hur),이성운(Cheng Yun Li),박천수(Chun Soo Park),장박(Bo Zhang),박홍석(Hong Suk Park) 한국초지조사료학회 2008 한국초지조사료학회지 Vol.28 No.1
본 실험은 표준화된 피복종자를 생산하기 위하여 피복통의 회전속도를 20, 30, 40, 45, 55, 60 rpm으로 하여 소형 피복통으로 레드클로버와 톨페스큐 종자를 피복하였다. 고형물질로는 vermiculite를 사용하였고 접착제는 polyvinyl alcohol을 사용하였다. 피복 후 통에서 회수된 단립 피복종자 무게, 서로 달라붙어 덩어리 진피복종자 무게, 피복되지 않고 회수된 미 피복물질 무게, 충격에 의한 피복층 탈락성 및 피복종자의 백립중 등을 조사하여 피복종자의 물리적 특성을 평가하였으며, 이 자료를 근거로 피복효과를 종합적으로 표현하는 피복지수를 산출하였다. 레드클로버 종자는 통의 회전속도 45 rpm에서 회수된 단립 종자 무게가 제일 높았으며(p<0.01), 덩어리진 종자 수가 적고 피복물질의 탈락율이 적었으며, 피복종자의 백립중도 가장 무거웠다. 톨페스큐 종자는 피복통 회전속도 40 rpm에서 회수된 단립 종자 무게가 제일 높았으며(p<0.01), 덩어리진 종자 수가 적고 피복물질의 탈락율이 적었으며, 피복종자의 백립중도 가장 무거웠다. 통의 회전속도별 피복지수는 레드클로버는 45 rpm에서 (p<0.01), 톨페스큐는 40 rpm에서 제일 높았다 (p<0.01). 피복통의 회전속도는 피복종자의 물리적 성질에 크게 영향을 미치기 때문에 종자피복 전에 종자나 피복제에 따른 피복통 회전속도의 표준화가 필수적이라 하겠다. Using a small pilot coating pan, red clover and tall fescue seeds were coated under different rotating speed of pan (20, 30, 40, 45, 55, 60 rpm) for standardization of seed coating. Vermiculite was used as particulate matter and polyvinyl alcohol as adhesive for the coating of seeds. Coating index was calculated based on the percent singles out, percent agglomerates out, weight of particulate matter fine, percent friability, and average weight per 100 seeds to evaluate the physical characteristics of coated seeds. The coated seed of red clover under 45 rpm rotating speed of pan, was best in terms of percent singles out, percent agglomerates out, weight of fines, and average 100 seed weight. The coated seed of tall fescue under 40 rpm rotating speed of pan, showed highest percent singles out, lowest percent agglomerates out, lowest weight of fines, and heaviest average 100 seed weight. Excellent coating results were obtained with the pan speed of 45rpm for red clover and 40 rpm for tall fescue seeds. As rotatory speed of coating pan affected much to the physical characteristics of coated seeds, standardization of the speed is required before seed coating.