• 한국고분자학회지:고분자과학과기술
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• 제9권3호
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• pp.235-242
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• 1998

• Natural Product Sciences
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• 제4권4호
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• pp.238-240
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• 1998

A new lignan, gossypiline (1) has been isolated from the aerial parts of Jatropha gossypifolia. The structure of 1 was established from its spectral data. The conversion of isogadain, a known lignan, to 1 confirmed the structure as well as the stereochemistry of 1.

• Bulletin of the Korean Chemical Society
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• 제13권5호
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• pp.551-553
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• 1992

An efficient and very short synthesis of epoxy alcohol 5, a key intermediate for leukotriene synthesis, was described. The key reaction involves the regioselective benzylidene acetal formation from methyl 5,6,7-trihydroxyheptanoate 1.

• 한국전기화학회:학술대회논문집
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• 한국전기화학회 1999년도 제3회 총회 및 추계학술발표회
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• pp.16-16
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• 1999

• Bulletin of the Korean Chemical Society
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• 제14권5호
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• pp.534-537
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• 1993

• Bulletin of the Korean Chemical Society
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• 제24권11호
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• pp.1585-1589
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• 2003

A PVC-based membrane electrode for thallium(I) ions based on 1,21,23,25-tetramethyl-2,20: 3,19-dimetheno-[H, 2] H, 23H, 25H-bis-[1,3] dioxocino[5,4-i:5',4'-i] benzo [1,2-d: 5.4-d'] bis [1,3] benzodioxocin(II) has been prepared. The electrode displays a linear dynamic range of $1.0{\times}10^{-1}-1.0{\times}10^{-5}$ M, with a Nernstian slope of $59.8{\pm}0.2\;mV\;{decad^-1}$, and a detection limit $5.0{\times}10^{-6}$ M. It has a very fast response time of<10 s and can be used for at least ten weeks without a considerable divergence in potentials. This electrode revealed comparatively good selectivity with respect to alkali, alkaline earth, and some transition and heavy metal ions and was effective in a pH range of 2.0-10.0. It was used as an indicator electrode in potentiometric titration of thallium ion with sulfide ion.

• Applied Biological Chemistry
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• 제29권2호
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• pp.175-181
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• 1986

연속적으로 대두를 재배한 토양과 신개간지 토양에서 재배한 대두 품종 단엽의 근류로부터 토착대두 근류근 87종을 분리하고 이들을 생장속도에 따라 Bradyrhizobium japonicum (slow-grower) 및 Rhizobium fredii (fast-grower)로 분류한 결과 전자가 55종, 후자가 32종이었다. 이두그룹의 대두 근류균을 질산염 환원특성에 따라 denitrifying fast-grower(F-1), nitrate respiring fast-grower(F-II), denitrifying slow-grower(S-I), 및 nitrate respiring slow-grower (S-II)로 세분 되었으며, 분리균주 총 87종중 S-I, S-II, F-I 및 F-II의 수는 각각 10, 22, 48 및 7종이었다. 이들 각 group 대두 근류균의 균체단백질의 전기영동 pattern상의의 차이를 1차 및 2차원 전기영동으로 분석한 결과 slow 및 fast-grower간에는 현저한 차이를 관찰할 수 있었으나 동일 생장속도를 가진 것 중 denitrifer와 nitrate repirer간에는 큰 차이가 없었다.

• Natural Product Sciences
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• 제4권1호
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• pp.23-25
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• 1998

Two samples of the fruits of Piper longum have been chemically investigated. From one sample a new alkamide, pergumidiene and from other sample two rare alkamides, brachystamide B and piperderdine have been isolated. The known compounds, piperine, piperlonguminine, pellitorine, (+)-sesamine and 3-(3', 4', 5'-trimethoxyphenyl)-propionic acid were the common constituents of both the samples.

• 대한화학회지
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• 제60권2호
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• pp.107-110
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• 2016

A new series of hydrazino thiazolyl-2-azetidinone 4(a-i) derivatives were synthesized efficiently using benzylidene hydrazinyl thiazole derivatives 3(a-i). The precursors, benzylidene hydrazinyl thiazoles were prepared by reacting 4-fluoro phenacyl bromide with thiosemicarbazones 2(a-i). All the structures of the synthesized compounds were ascertained by IR, NMR and mass spectral analysis.

• Bulletin of the Korean Chemical Society
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• 제29권4호
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• pp.873-875
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• 2008