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제주도 지하수의 전기비전도도와 염소이온의 지역별 변화 양상
문영석,고기원,최영찬,고용구 濟州大學校海洋硏究所 1995 해양과환경연구소 연구논문집 Vol.19 No.-
The specific electrical conductivity and the chloride contents were monitored at 98 sits in Cheju Island during two years (1994.2∼1995.11) to the purpose of characterized to regional variations of its elements. The areas of east and west were characterized by both higher elements contain than south and north area. Chloride and specific electrical conductivity values from Kimyoung to Shinhung areas showed more than 100㎎/ℓand 400 μmohs/㎝, respectively. Also west areas relatively high values of both elements were derived from agricultural practice and feeding cattle. However, the difference of difference of these areas indicated that the groundwater environments were different.
A New Black Soybean Cultivar, “Geomjeongsaeol” with Large Seed,Early Maturity and Lodging Tolerance
In-Youl Baek,Keum-Yong Park,Jung-Kyung Moon,Yong-Ho Kim,Sun-Lim Kim,Ja-Hwan Ku,Yeong-Ho Lee,Yong-Hwan Ryu,In-Youl Baek,Won-Young Han,Hyun-Tae Kim,Jun-Hyeon Cho,Jong-Min Ko,Doo-Chull Shin,Duck-Yong Suh 한국육종학회 2005 한국육종학회지 Vol.37 No.5
A new black seed coated soybean cultivar with yellow cotyledon, Geomjeongsaeol was developed at the YeongnamAgricultural Research Institute (YARI) in 2004. Geomjeongsaeol was selected from a cross Keunol/ Geomjeongol. The prelimi-nary, advanced, and regional yield trials for evaluation and selection of this line (Milyang 123) were carried out from 1999 tospherical seed shape, oval leaflet shape, and large seed size (31.1 grams per 100 seeds), and it was 4 days later in maturity than thecheck variety Geomjeongol. In the seed quality such a crude protein, oligo-saccharide, and anthocyanin contents, Geomjeongsaeolwas higher than check variety, and it has good adaptability for cooking with rice. It also has been identified to have resistance tosaeol was 2.34 ton per hectare in the regional yield trials (RYT) carried out for two years from 2003 to 2004 which was 26 percenthigher than the check variety Geomjeongol.
Hydrological Stability Analysis of the Existing Soyanggang Multipurpose Dam
Ko, Seok-Ku,Shin, Yong-Lo Korea Water Resources Association 1996 Korean journal of hydrosciences Vol.7 No.-
This study aims at suggesting an alternative to improve flood controling capacity according to the cument design criteria for the existing Soyanggang Multi-purpose Dam which was constructed 20 years ago as the largest dam in Korea. The peak inflow of the adopted probable maximum flood (PMF) at the time of construction was 13,500 $m^3$/s. However, the newly estimated peak inflow of the PMF is 18,000 $m^3$/s which is 1.34 times bigger than the original one. This is considered to be due to the accumulation of the reliable flood and storm event records after construction, and due to the increasing tendency of the local flood peaks according to the influence of world-wide weather change. The new estimation of the probable maximum precipitation (PMP) was based on the hydro-meteorological method suggested by the guideline of the World Meteorological Organization (WMO). The unit hydrograph which was applied for the estimation of PMF was derived through linear programming algorithm by minimizing the sum of absolute deviations of the calculated and recorded flood hydrographs. In order to adopt the newly estimated PMF as a design flood, following four alternatives were compared : (1) allocation of more flood control space by lowering the normal high water level, (2) construction of a new spillway in addition to the existing spillway, (3) construction of a new dam which has relevant flood control storage at the upstream of the Soyanggang dam, (4) raising the existing dam crest. The preliminary evaluation of these alternatives resulted in that the second alternative is most economic and feasible. So as to stably cope with the newly estimated PMF by meeting all the current functions of the multipurpose dam, a detailed study of an additional spillway tunnel has to be followed.
Ko, Won-Il,Yoon, Young-Ku,Park, Yong-Ki Korean Nuclear Society 1992 Nuclear Engineering and Technology Vol.24 No.2
Excess tritium analysis was peformed to verify whether or not cold fusion occurs during electrolysis of heavy water in the current density range of 83~600 mA/$\textrm{cm}^2$ for a period of 24 ~ 48 hours with use of palladium electrodes of seven different processing treatments and geometries. The extent of recombination of D$_2$ and $O_2$gases in the electrolytic cell was measured for the calculation of accurate enthaplpy values. The behavior and interaction of hydrogen atoms with defects in Pd electrodes were examined using the Sieverts gas charging and the positron annihilation(PA) method. Slight enrichment of tritium observed was attributed to electrolytic enrichment but not to the formation of a by-product of cold fusion. The extent of recombination of D$_2$and $O_2$gases was 32%. Hence the excess heat measured during the electrolysis was considered to be due to the exothermic reaction of recombination but not to nuclear fusion. Lifetime results from the PA measurements on the Pd electrodes indicated that hydrogen atoms could be trapped at dislocations and vacancies in the electrodes and that dislocations were slightly more preferred sites than vacancies. It was also inferred from R parameters that the formation of hydrides was accompanied by generation of mostly dislocations. Doppler broadening results of the Pd electrodes indicated that lattiec defect sites where positrons were trapped first increased and then decreased, and this cycle was repeated as electrolysis continued. It can be inferred from PA measurements on the cold-rolled Pd and the isochronally annealed Pd hydride specimens that microvoid-type defects existed in the hydrogen-charged electrode specimen.
Biomechanical Analysis of the Lower-Limb Exoskeleton (CEX) in Harvesting Task
Yong-Ku Kong(공용구),Kyeong-Hee Choi(최경희),Seoung-Yeon Kim(김승연),Min-Jung Kim(김민정),Sang-Soo Park(박상수),Jin-Woo Shim(심진우),Dong Jin Hyun(현동진),Kihyeon Bae(배기현),Jong Kyu Choi(최종규),Sang Min Ko(고상민),Min-Uk Cho(조민 대한인간공학회 2021 대한인간공학회 학술대회논문집 Vol.2021 No.6
Ku, Jin Mo,Kim, Soon Re,Hong, Se Hyang,Choi, Han-Seok,Seo, Hye Sook,Shin, Yong Cheol,Ko, Seong-Gyu Springer US 2015 MOLECULAR AND CELLULAR BIOCHEMISTRY - Vol.409 No.1
<P>Breast cancer is the most common cancer for women and is a major cause of mortality in women. Doxorubicin is a generally used chemotherapy drug for breast cancer. However, multidrug resistance of breast cancer interferes with the chemotherapy. We examined whether cucurbitacin D affects doxorubicin resistance of MCF7/ADR breast cancer cells. Cell viability was measured by MTT assay. Levels of p-STAT3, p-NF-κB, IκB, and caspases were measured by Western blot analysis. Nuclear staining of Stat3 and NF-κB was measured by immunocytochemistry. STAT3 and NF-κB transcriptional activity was detected by STAT3 and NF-κB luciferase reporter gene assays. Analysis of cell cycle arrest was performed by flow cytometry. Induction of apoptosis by cucurbitacin D was measured by Annexin V-FITC/propidium iodide assay. More than 90 % of MCF7/ADR cells lived upon treatment with doxorubicin for 24 h. However, upon treatment with cucurbitacin D, cell death was more than 60 %. Co-administration of cucurbitacin D and doxorubicin induced apoptosis, and G2/M cell cycle arrest, and inhibited upregulated Stat3 by doxorubicin on MCF7/ADR cells. Additionally, cucurbitacin D led to an increase in the IκBα level in the cytosol and a decrease in the p-NF-κB level in the nucleus. Finally, cucurbitacin D inhibited translocation of Stat3 and NF-κB and decreased transcriptional activity in the nucleus. Cucurbitacin D decreases cell proliferation and induces apoptosis by inhibiting Stat3 and NF-κB signaling in doxorubicin-resistant breast cancer cells. Cucurbitacin D could be used as a useful compound to treat adriamycin-resistant patients.</P>
高容九,崔永贊,吳德鐵 濟州大學校 基礎科學硏究所 1992 基礎科學硏究 Vol.5 No.1
서귀포 시내를 흐르며 천지연 폭포수와 정방폭포수를 이루는 연희천과 동홍천을 대상으로 하여 1990년 10월부터 1991년 9월까지 매월 理化學的, 細菌學的 조사를 실시하였다. 理化學的 성분중 DO, BOD, SS 및 SiO₂-Si의 농도범위는 연희천에서 각각 6.61∼12.82㎎/ℓ, 0.1∼4.5㎎/ℓ, 0.10∼17.10㎎/ℓ, 5.11∼16.22㎎/ℓ였으며, 동홍천에서는 5.30∼11.92㎎/ℓ, 0.4∼17.2㎎/ℓ, 0.51∼48.67㎎/ℓ, 5.16∼14.80㎎/ℓ를 나타내고 있었다. 大腸菌群, 糞便性大腸菌群, 糞便性腸球菌, 葡萄狀球菌등 오염지표 세균의 조사결과는 연희천이 동홍천보다 세균학적으로 양호한 상태에 있음을 보여주고 있다. 연희천과 동홍천의 大腸菌群數는 각각 750-24×10⁴/100㎖와 1100 24×10⁴였으며 糞便性大腸菌群數는 23-24×10³개/100㎎ 와 9~24×10 5개/100ml였다. 糞便性腸球菌은 각각 2∼1324개/100㎖와 3∼13233개/100㎖였으며, 葡萄狀球菌은 6∼223개/100㎖와 2∼1042개/100㎖였다. 한편 연희천은 중하류로 갈수록 수질이 나빠지고 있어 周邊域에서의 下水, 汚水가 流入되고 있음을 알 수 있으며, 동홍천은 상류역의 汚濁된 수질이 중, 하류의 수질에 惡影響을 미치고 있었다. The physical, chemical and bacteriological investigations on the three sites of each two streams, Yeonhee-chun and Donghong-chun which are the sources of two water-falls, Chonjiyon-fall and Chongbang-Fall respectively in Seogwipo City, Korea, were carried out monthly from October 1990 to Septermber 1991. The ranges of DO, BOD, SS and SiO₂-Si concentration of Yeonhee-chun were 6.61∼12.82㎎/ℓ, 0.1∼4.5㎎/ℓ, 0.10∼17.10㎎/ℓ and 5.11∼16.22㎎/ℓ respectively, and those of Donghong-chun were 5.30∼11.92㎎/ℓ, 0.4∼17.2㎎/ℓ, 0.51∼48.67㎎/ℓ and 5.16∼14.80㎎/ℓ respectively. The result of bacterial investigations for the pollution indicator bacteria such as total coliforms, fecal coliforms, fecal streptococci and others showed that the bacterial quality of Yeonhee-chun was somewhat better than that of Donghong-chun. The MPNs of total coliforms of Yeonhee-chun and Donghong-chun were 750-24×10⁴/100㎖ and 1100-24×10 5/100mlrespectively, and those of facal coliforms were 23-24×10³/100㎎ and 9-24×10 5/100ml respectively. The numbers of fecal streptococci of Yeonhee-chun and Donghong-chun were 2-1,324/10㎖ and 3-13,233/10㎖ respectively.