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주교진,전소희,노동윤 서울여자대학교 자연과학연구소 2013 자연과학연구논문집 Vol.25 No.-
The morphology change of silver nano-structures has been investigated by changing reagent concentrations, the speed of a magnetic bar, reaction temperature, and reaction time in the polyol process which were carried out in ethylene glycol solutions containing AgNO3 as a metal source and PVP (polyvinylpyrolidone) as a capping agent. Under optimized reactions, silver nanowires or nanocubes were obtained as a major product, and their morphology and composition were identified by FE-SEM and EDX analyses, respectively.
주교진,박신애,노동윤 서울여자대학교 자연과학연구소 2012 자연과학연구논문집 Vol.24 No.-
Using optically-active 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl (BINAP) as a P-donor, heteroleptic Pt(Ⅱ) compounds (R)-/(S)-(BINAP)Pt(TFBT)2 (H(TFBT) = 2,3,5,6-tetrafluorobenzenethiol) are prepared from (R)-/(S)-(BINAP) and (COD)PtCl2 via (R)-/(S)-(BINAP)PtCl2. These Pt(Ⅱ) compounds are characterized by FT-IR and 1H NMR spectroscopic analyses. It is noted that the arylmonothiolate ligand (TFBT) is labile in solution due to the lack of chelate effect.
정교철 안동대학교 기초과학연구소 1997 基礎科學 硏究論文集 Vol.8 No.1
Most rock masses contain a joint system that consist of a number of joint sets. A joint may be defined formally as a fracture that traverses a rock mass and is not accompanied by any discernible displacement of one face of the fracture relative to the other. In addition to, individual joints have variable but finite length. This study describes how the three-dimensional estimation of joint distribution is calculated from surface observations in field for engineering purposes. Three-dimensional joint count is a useful measure of the degree of jointing given as number of joints in a unit volume of rock masses and is easily calculated from standard joint descriptions. The three-dimensional estimation on joint distribution in outcrop can also be used to calculate the interblock size in jointed rock masses.
위암의 병기결정에 있어서 이중시기 나선식 CT의 유용성
최교창 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1
Purpose: To evaluate the usefulness of two-phase spiral CT in the staging of gastric carcinoma. Materials and Methods: The author preformed two-phase spiral CT in 49 patients with gastric carcinomas surgically and pathologically proven after endoscopic biopsy. CT scans were obtained after ingestion of 800-1000mL of water. In all 49 patients, two-phase spiral CT findings of gastric carcinoma were retrospectively evaluated and correlated with surgical and pathological findings. Results: The author correctly detected 15(83.3%) of 18 early gastric carcinomas and 31(100%) of 31 advanced gastric carcinomas by two-phase spiral CT. The overall detection rate of gastric carcinomas was 93.9%(46 of 49 cases). The detection rate of early gastric carcinoma was 100%(5 of 5 cases) among elevated lesions and 76.9%(10 of 13 cases) among flat or depressed lesions. With regard to the depth of tumor invasion, there was good correlation between CT findings and pathologic findings in 28 of 49 cases(57.1%). Overstaging occurred in 24.5%(12 of 49 cases) and understaging in 18.4%(9 of 49 cases). In lymph node staging, good correlation between CT findings and pathologic findings was noted in 33 of 49 cases(67.3%). Understaging occurred in18.4%(9 of 49 cases) and overstaging in 14.3%(7 of 49 cases). All of liver metastases(3 cases) and peritoneal carcinomatosis(1 case) were correctly diagnosed by two-phase spiral CT. Conclusion: In the staging of gastric carcinoma, two-phase spiral CT is useful in the deterction of early gastric carcinoma and distant metastasis. However, for determining the depth of tumor invasion and for the evaluation of metastasis to lymph node its usefulness is limited. Further research using various analytic approaches will therefore be necessary.
金敎成,曺根鍾 漢陽大學校 體育科學硏究所 1986 體育科學 Vol.6 No.6
The purpose of this study was to investigate effect of Vitamin E on improvement of cardiovascular endurance. Selected subiects-12 soccer players and 12 general high school boys were divided into 4 groups as follows. A; Soccer players who were trained after taking Vitamin E, (6 persons) B; Soccer players who were trained only, not dosage. (6 persons) C: General students who were trained after dosed Vitamin E, (6 persons) D; General students who were not trained, but taking Vitamin E. (6 persons) Each group was trained for 5 weeks by training program. (17 mins/day, 3 days/ week), after training measured and analysised heart-rate, vital-capacity, 1000m race-record, heart-rate after 1000m race in every 5 weeks. The conclusions are as follows: 1. Resting heart-rate lowed 4. 0 beats/min in A, C group (P<0.05) after training but control group was not lowed. 2. Vital-capacity increased in C group(287cc, P<0.001) and A group (149cc, P<0.05). 3. 1000m race record improved in order of C-A-B group so, each group was shortened 17 sec (P<0.05) , 12 sec (P<0.05) 11 sec (P<0.05) 4. Heart-rate after 1000m race improved in order of C-A-K group so, each group was lowed 6.6 beats/min, 6.0 beats/min, 5.6 beats/min(P<0.05). Synthetically cardiovascular endurance improved both players and general group but general group rather than players. The result indicated that Vitamin E was effected to improvement of cardiovascular endurance. But there was no improvement of cardiovascular endurance in K group except 1000m race record. It was that the result was not dosage effect but training effect.