• 약학회지
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• 제54권6호
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• pp.441-448
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• 2010

In present study, classification and quality control of Genus Polygonatum were developed using the isolated from Polygonati Odorati Rhizoma and Polygonati Rhizoma. 3 components were isolated from Butanol fractions of Polygonati Rhizoma, and 2 components were isolated from Hexane and Butanol fractions of Polygonati Odorati Rhizoma. All the components were obtained using silica gel and ODS column chromatography. The compounds were identified as adenosine, 14-hydroxylfurost-5-ene-3-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}2$)-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}4$)-O-${\beta}$-D-galactopyranosyl-26-O-${\beta}$-D-glucopyranoside, 22-O-methyl-14-hydrocxyfurost-5-ene-3-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}2$)-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}4$)-O-${\beta}$-Dgalactopyranosyl-26-O-${\beta}$-D-glucopyranoside, ${\beta}$-Sitosteryl-3-O-${\beta}$-D-D-glucopyranoside, 14-hydoxylfurost-5-ene-3-O-${\beta}$-Dglucopyranosyl-($1{\rightarrow}2$)-O-[${\beta}$-D-xylopyranosyl-($1{\rightarrow}3$)]-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}4$)-O-${\beta}$-D-galactopyranoside through physicochemical data, spectroscopic methods ($^1H$-NMR, $^{13}C$-NMR, Mass) according references. The quality control of genus Polygonatum were conducted using HPLC quantitative analysis of 14-hydroxylfurost-5-ene-3-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}2$)-O-${\beta}$-D-glucopyranosyl-($1{\beta}4$)-O-${\beta}$-D-galactopyranosyl-26-O-${\beta}$-D-glucopyranoside, 14-hydoxylfurost-5-ene-3-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}2$)-O-[${\beta}$-D-xylopyranosyl-($1{\rightarrow}3$)]-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}4$)-O-${\beta}$-D-galactopyranoside in 30 samples collected throughout Korea and China. This method provided a tool for standardization of mix or misusing the commercial Odorati Rhizoma and Polygonati Rhizoma. As a result, contained quantity of 14-hydroxylfurost-5-ene-3-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}2$)-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}4$)-O-${\beta}$-D-galactopyranosyl-26-O-${\beta}$-D-glucopyranoside was measured $0.008{\pm}0.006%$ and 14-hydoxylfurost-5-ene-3-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}2$)-O-[${\beta}$-D-xylopyranosyl-(13)]-O-${\beta}$-D-glucopyranosyl-($1{\rightarrow}4$)-O-${\beta}$-Dgalactopyranoside was measured $0.026{\pm}0.012%$.

• Applied Science and Convergence Technology
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• 제26권2호
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• pp.30-33
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• 2017

ZnO thin films which were deposited by RF magnetron sputtering system were annealed by furnace and insitu heat treatment methods. We investigated the effect of heat treatment method on physical properties of ZnO thin films. The structural and optical properties of ZnO thin films were improved by heat treatment. Through the annealing treatment of ZnO film by furnace, the good crystallinity and ultraviolet emission were obtained. These results are attributed to the improved formation of Zn-O bond in ZnO thin film annealed at by furnace. We confirm that the formation of Zn-O bond plays an important role in obtaining the excellent structural and optical properties of ZnO thin films.

• 한국전기전자재료학회논문지
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• 제26권1호
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• pp.22-26
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• 2013

PTCR ceramics of $(Ba_{0.998}Sm_{0.002})TiO_3+0.001MnCO_3+xSiO_2$ (x=1, 2, 3, 4, 5, 6 mol%) were fabricated by solid state method. Disk samples of diameter 5 mm and thickness about 1mm were sintered at $1,290^{\circ}C$ for 2 h in reduced atmosphere of $5%H_2-95%N_2$ followed by re-oxidation at $600^{\circ}C$ for 30 min. in $20%O_2-80%N_2$.and their microstructures and electrical properties were investigated with SEM and Multimeter. The color of sintered samples was strongly dependent on $SiO_2$ content showing that the color of samples with $SiO_2$ of 1~2 mol% was gray but that of samples with $SiO_2$ of 4~6 mol% was changed from gray to blue, which seems to be related with the reduction of samples due to the oxygen vacancies created during the sintering in reduced atmosphere. $SiO_2$ content had a great influence on the microstructure and the electrical properties. With increasing $SiO_2$ content, the grain size of samples increased and the resistivity as well as the resistivity jump ($R_{285}/R_{min}$) decreased, which is considered to be attributed to the resistivity change at grain interior and grain boundary due to the fast mass transfer through $SiO_2$ liquide phase during the sintering. Samples with 2 mol% $SiO_2$ has the resistivity of $202{\Omega}cm$ and the resistivity jump of 3.28. It is expected that $SiO_2$ doped $BaTiO_3$ based PTC ceramics can be used for multilayered PTC thermistor due to the resistance to the sintering in reduced atmosphere.

• 공원문화
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• 통권44.45호
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• pp.26-26
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• 1989

• 출판저널
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• 통권21호
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• pp.26-26
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• 1988

• 대한치과보철학회:학술대회논문집
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• 대한치과보철학회 2003년도 춘계학술대회 및 제1회 한일 공동 학술대회
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• pp.26-26
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• 2003

• 출판저널
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• 통권25호
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• pp.26-26
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• 1988

• 한국양식학회지
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• 제6권4호
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• pp.255-271
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• 1993

1990년 11월 중순에 경남 하동군 섬진강 하류역에서 채집한 자웅성체를 동의대학교 생물생산연구소내에서 사육하며 인공채란을 하였고 거기서 부화된 유생을 사용하며 그들의 발생과 사육$\cdpt$성장에 미치는 수온 및 염도의 호적조건을 조사하였다. 부화된 유생은 Zoea 상태로서 제5 zoea 영기를 지나 megalopa 유생으로 이행되며, 수온$22^{\circ}C$ 염도 $24.5\%o$ 조건하에서 부화한 영기별 유생의 탈피간격은, 제1기 Zoea는 1-4 일, 제 2기 zoea는 4-8일, 제 3기 zoea는 7-10일, 제 4기 zoea는 9-13일 제 5기 zoea는 12-19일이므로 각각 4일, 5일 및 8일이 소요되고, 그 후 megalopa 유생으로 이행하기까지는 부화후 16-26일이 소요되며, 그로부터 8-10일후에 제1기 치게로 변태된다. 부화로 부터 제1기 치게까지의 각성장단계별 개체군의 두흉갑장 길이변화는 $Y\;=\;0.29513e^{0.28479X}$의 곡선식으로 표시된다. 초기유생의 각 영기에 따른 형태적인 중요특징은 악각외지우상모수와 유영지의 출현상태 여부로서 용역하게 식별되며, 그 중에서 제1기 zoea 유생의 악각외지우상모수는 4개, 제2기는 6개, 제3기는 8개, 제4기는 10개, 제5기는 12개이다. Megalopa 유생으로의 이행에 소요되는 일수와 생존율을 종합하면, 초기유생의 생육에 따른 호적한 수온범위는 $18\~28^{\circ}C$이고, 그 중에서도 최적수온범위는 $20\~26^{\circ}C$인 듯하다. 또한 생육에 따른 호적한 염도범위는 $17.5\~31.5\%o$이고 그 최적염도는 $24.5\%o$인 듯하다. Zoea 유생은 비교적 높은 염도인 $17.5\~35.0\%o$ 범위에서 적응력이 큰 데 비하여, megalopa 유생은 $14.0\~31.5\%o$범위로서 zoea 유생에 비하여 다소 저염성으로 기울어지는 경향을 보이며, 특히 치게로 변태되면 담수로 부터 해수에 이르기까지의 전범위에서 생육이 가능한 광염성으로 변한다. 유생의 생육에 다른 각단계별의 수온$\cdot$염도를 조합한 복합조건하에서는 수온 $22\~26^{\circ}C$ 범위와 염도 $17.5\~31.5\%o$, 범위를 서로 조합한 경우가 유생의 생육에 대한 호적범위로서 megalopa 유생까지의 이행률은 $80\%$이상이고, 이행까지에는 $14\~18.7$일이 소요된다. 특히 그중에서도 수온 $26^{\circ}C$와 염도 $24\%o$하에서는 megalopa 유생까지 의 이행률이 $90\%$, 소요 일수는 14일을 나타냄으로써 최적한 생육조건인 듯하다. Megalopa 유생에서 치게로 변태시키는데 따른 각 수온과 염도를 조합시킨 경우의 호적한 범위는 수온 $18\~28^{\circ}C$와 염도 $10.5\%o\~35.0\%o$로서 이 범위 사이에서는 수온에 관계없이 $80\%$ 이상의 변태$\cdot$생존율을 나타내나, 그 중에서도 수온 $22\~26^{\circ}C$, 염도 $10.5\%o\~31.5\%o$ 범위가 최적한 조건인 듯 하다.

• 천문학논총
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• 제26권4호
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• pp.147-157
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• 2011

I found evidence that Kim Y$\breve{o}$ng (金泳, 1749-1817) is the author of the Korean Poch'$\breve{o}$n'ga with New Charts published in 1792 by the Astronomical Bureau of the Chos$\breve{o}$n dynasty. I reconstructed a history of Kim Y$\breve{o}$ng from various literature remained in other persons' anthologies and governmental records. My findings on the author and publication year can help to solve the problem on the origin of star charts in the Poch'$\breve{o}$n'ga with New Charts. I also considered the changes of Chinese Bu-Tian-Ge and their star charts after Chongzhenglishu (崇禎曆書). I found that the new charts in the book of Huantiantushuo published by Li Mingche (李明徹, 1751-1832) in 1819 are approximately the same to those in the Poch'$\breve{o}$n'ga with New Charts by Kim Y$\breve{o}$ng in 1792.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
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• pp.422-425
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• 2001

The electrical properties of ZnO-$Pr_6O_{11}$-CoO-$Cr_2O_3-La_2O_3$ based varistors were investigated with sintering temperature in the range of $1240\sim1300^{\circ}C$. The varistors sintered at $1240\sim1260^{\circ}C$ exhibited high density, which was 5.50- $5.70g/cm^3$ corresponding to 95.2~98.6% of theoretical density. The varistor voltage was decreased in range of 718.47~108.00 V/mm with increasing sintering temperarture. The varistors sintered at $1240\sim1260^{\circ}C$ exhibited good electrical properties, in which the nonlinear exponent is in the range of 79.25~49.22 and leakage current is in the range of 0.26~$1.00 {\mu}A$ In particular, the varistor sintered at $1240^{\circ}C$ showed very excellent electrical properties, in which the nonlinear exponent is 79.25 and leakage current is $0.26{\mu}A$