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부유대역 용융응고법으로 제조된 YBa_2Cu_3O_x 산화물초전도체의 미세구조와 전기적 특성
노태형,송정환,장규철,한이섭,김소정,구본급,김호기 대전산업대학교 반도체기술연구소 2000 半導體技術硏究所報 Vol.2 No.-
The YBa_2Cu_3O_x-20 wt% Y_2BaCuO_5 composition designed in YBCO system was synthesized by solid state reaction method. The optimum condition of hot zone temperature and growth rate in floating-zone melt were 1080 ℃ and 2.5 mm/hour, respectively. In samples growth as these condition, the low angel boundaries in grain direction and small amount of amorphous phase known as decreasing characteristics of superconducting materials between grain boundaries in microstructure are investigated by polarized light microscopy on the whole. The critical current density(Jc) at 77k of sample using powder fabricated with no CeO_2 and doped 5 wt%CeO_2 were 8,000 A/㎠(Jc : 561A) and 12,000 A/㎠(Jc: 826A) at 0 T by direct current transport method, respectively.
Amplification of Sulforaphane Content in Red Cabbage by Pressure and Temperature Treatments
Koo, Song-Yi,Cha, Kwang-Hyun,Song, Dae-Geun,Chung, Dong-Hwa,Pan, Cheol-Ho The Korean Society for Applied Biological Chemistr 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.2
Red cabbage, a Brassica vegetable, has glucoraphanin that is hydrolyzed by myrosinase to form sulforaphane, which has received attention due to its cancer chemopreventive activity. High hydrostatic pressure (HHP) treatment (100~400MPa) and subsequent incubation ($20{\sim}80^{\circ}C$) were employed to amplify health beneficial sulforaphane content in red cabbage. The highest quantity of sulforaphane was $99.7{\mu}mol/kg$ fresh weight from HHP treatment at 400MPa, followed by standing at $60^{\circ}C$. Cytotoxicity was determined to evaluate the side effect of HHP-treated red cabbage.
Koo, Song Yi,Mok, Il-Kyoon,Pan, Cheol-Ho,Kim, Sang Min American Chemical Society 2016 Journal of agricultural and food chemistry Vol.64 No.49
<P>To facilitate the utilization of fucoxanthin (FX), a valuable marine carotenoid, in the food industry, FX-loaded casein nanoparticles (FX-CN) and chitosan-coated FX-CN (FX-CS-CN) were developed using the FX-enriched fraction from Phaeodactylum tricornutum. Two nanoscale particles (237 +/- 13 nm for FX-CN and 277 +/- 26 nm for FX-CN-CN) with spherical and smooth surfaces showed over 71% encapsulation efficiency and polydispersity index (PDI) value of 0.31-0.39 in water. Owing to the chitosan coating, FX-CS-CN showed a positive zeta potential (24.00 mV), whereas that of FX-CN was negative (-12.87 mV). In vitro simulated digestion demonstrated better FX bioaccessibility from the nanoparticles versus P. tricornutum powder (Pt-powder) and from FX-CN versus FX-CS-CN. However, in C57BL/6 mice, fucoxanthinol absorption to the blood circulation was two times higher for FX-CS-CN versus FX-CN, possibly due to increased retention or adsorption to mucin by the cationic biopolymer in the chitosan-coated particles. These results demonstrate that FX-CS-CN can enable the application of FX, with improved bioavailability and water dispersibility, in the food industry.</P>
Amplification of Sulforaphane Content in Red Cabbage by Pressure and Temperature Treatments
( Song Yi Koo ),( Kwang Hyun Cha ),( Dae Geun Song ),( Dong Hwa Chung ),( Cheol Ho Pan ) 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.2
Red cabbage, a Brassica vegetable, has glucoraphanin that is hydrolyzed by myrosinase to form sulforaphane, which has received attention due to its cancer chemopreventive activity. High hydrostatic pressure (HHP) treatment (100~400MPa) and subsequent incubation (20~80℃) were employed to amplify health beneficial sulforaphane content in red cabbage. The highest quantity of sulforaphane was 99.7 μmol/kg fresh weight from HHP treatment at 400MPa, followed by standing at 60℃. Cytotoxicity was determined to evaluate the side effect of HHP-treated red cabbage.
Koo, Song Yi,Cha, Kwang Hyun,Song, Dae-Geun,Lee, Dong-Un,Pan, Cheol-Ho The Korean Society for Applied Biological Chemistr 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.5
High hydrostatic pressure (HHP) treatment was used to increase the concentration of sulforaphane in Brussels sprout, a cruciferous vegetable known to have health benefits. The highest concentration of sulforaphane was $1021.8{\mu}mol$ per kg fresh weight of Brussels sprouts after HHP treatment at 500 MPa, which corresponded to a 317% increase compared to the HHP-untreated control.
Amplification of Sulforaphane Content in Red Cabbage by Pressure and Temperature Treatments
Song Yi Koo,Kwang Hyun Cha,Dae-Geun Song,Donghwa Chung,Cheol-Ho Pan 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.2
Red cabbage, a Brassica vegetable, has glucoraphanin that is hydrolyzed by myrosinase to form sulforaphane, which has received attention due to its cancer chemopreventive activity. High hydrostatic pressure (HHP) treatment (100~400MPa) and subsequent incubation (20~80oC) were employed to amplify health beneficial sulforaphane content in red cabbage. The highest quantity of sulforaphane was 99.7 μmol/kg fresh weight from HHP treatment at 400MPa, followed by standing at 60oC. Cytotoxicity was determined to evaluate the side effect of HHP-treated red cabbage.
낭성법랑모세포종, 함치성낭, 치성각화낭의 방사선소견과 Ki-67, PCNA, Cytokeratin 발현과의 연관성에 관한 연구
송만용,이삼선,이진구,이원진,허민석,이재일,민병무,최순철 대한구강악안면방사선학회 2004 Imaging Science in Dentistry Vol.34 No.2
Purpose : To compare the proliferation potential of the epithelial cells between unicystic ameloblastoma (UA), dentigerous cyst (DC), and odontogenic keratocyst (OKC) and to correlate this proliferation potential with the radiographic features of these three pathoses. Materials and Methods : Immunohistochemical expression of PCNA, Ki-67, and cytokeratin as a proliferation marker were assessed for 15 cases of UA, 15 cases of DC, and 15 cases of OKC. The degree of immunochemical expression of three proliferation markers were correlated with the radiographic features, especially cortical expansion (negative and positive) and shape of border (scalloped and round). Results : Using PCNA and Ki-67, OKC showed the highest proliferation potential and UA the lowest. Statistically significant differences were found between the OKC and the UA (p.0.05). However, no statistically significant difference was present according to the radiographic features in all pathoses. Using cytokeratin, there was no significant differences of proliferation potential among three pathoses. Conclusions : OKC epithelium has the most intense proliferation potential, followed by the dentigeous cyst and then unicystic ameloblastoma. There is no significant relation between the radiographic features and the proliferation potential of epithelium of these three pathoses.
이장덕,구자갑,김종수,이송 안성산업대학교 1996 論文集 Vol.28 No.-
A general govering equation for PMT can be derived based on the hyperbolic soil model and the cavity expansion theory. The curve fitting technique was used to establish the pressure-strain curve without disturbance of soil during testing. This interpretation makes use of both the loading and unloading portions of the test. An interpretation methodology is described and illustrated with PMT data carried out in the weathered Granitic soil to estimate initial shear modulus. SPT is very common site investigation technique in Korea. Therefore the blow counts of SPT are compared with initial shear modulus which give a following relationship. G_i = -102 + (kg/㎠)