• 한국잠사곤충학회지
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• 제48권1호
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• pp.1-5
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• 2006

본 연구에서는 뛰어난 물리, 화학적 특성을 가진 CPA에 CSA를 이용하여 $-SO_3H$ group이 도입된 SCPA를 제조하였다. SCPA의 제조과정에서 반응계의 온도가 $10^{\circ}C$ 이상, CSA의 농도가 0.05mol 이상에서는 정상적인 반응이 진행되지 않았다. SCPA의 이온교환 용량에 따라 Tg가 소폭 증가하는 경향을 나타내었다. 치환 반응중 분자간 가교결합이나 주쇄의 분해가 일어났음을 GPC를 통하여 간접적으로 확인 할 수 있었으나, 이들 부 반응에 의한 열적 및 기계적 특성 변화는 거의 없었다.

• 약학회지
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• 제38권3호
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• pp.230-237
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• 1994

The structure-activity relationships of (E)-chalcone-4-carboxylic acids, flavone-4'-carboxylic acids, two types of aromatic amides, terephthalic monoanilides, and (arylcarboxamido)benzoic acids, which were made by Shudo group, are discussed by conformation analysis(AM1) of retinoic acid and those compounds. Conformer of each compound is superimposed on the conformationally restricted compound, 4-(6,7,8,9-tetrahydro-6,6,9,9-tetramethyl-4H-4-oxonaphto[ 2,3-b]pyran-2-yl) benzoic acid(Fv80), possessing the strongest differentiation-inducing activity on human promyelocytic leukemia cells HL-60. The results indicated that the lengths between the carboxylic carbon and the two 6, 9 carbons binding to dimethyl, 1.20 nm and 1.09 nm, as well as the planarity of molecule are very important factors for the activity, especially 1.20 nm. In the case of the recently synthesized azulenic retinoic acids by Sato, et al. in 1993, the distance probably is also important, resulted from superimposing them on a Ch55 conformer and Fv80. The distance 1.0 nm is also important in Ch55. Several conformers of all-trans retinoic acid (RA) are well superimposed on the almost non-flexible Fv80, RA, 9-cis RA, and, specifically s-10,12 cis RA. And a simple hexangular model of RA is suggested to draw RA conformers easily without computer drawing model or molecular model.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
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• pp.331-336
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• 2006

The aim of this work was to inhibit the heat-and moisture-induced yellowing of ECF/TCF bleached hard wood kraft pulp (HBKP) retaining hexenuronic acid (HexA). We have already reported that one of the derivatives of HexA, 5-formyl-2-furancarboxylic acid (FFA), causes yellowing of HBKP in acidic paper, and that FFA might polymerize or react with pulp components to form new chromophoric groups (1). In this study, it was shown that the carboxylic base of FFA interacts with that of glucuronic acid or galacturonic acid, resulting in strong yellowing. Therefore, it seems that preventing the reaction of carboxylic bases could be effective in suppressing this yellowing. We have discovered that polycarboxylic acids (for example, citric acid, tartaric acid, etc.) are useful as a yellowing inhibitor.

• 대한화학회지
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• 제42권1호
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• pp.102-104
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• 1998

• Bulletin of the Korean Chemical Society
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• 제31권9호
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• pp.2672-2674
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• 2010

• 생약학회지
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• 제28권3호
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• pp.143-148
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• 1997

From the root of Symplocarpus renifolius, four compounds were isolated and their structure was elucidated by chemical and spectroscopic methods. They were identified as ${\beta}-sitosterol$ (compound 1), asparagine (compound 2), isocorydine (compound 3) and 3-hydroxymethyl-4-phenyl phenoxy carboxylic acid glucopyranosyl ester (compound 4). These compounds were firstly isolated from roots of Symplocarpus renifolius. Compound 4 was identified as a new compound, named as symplocarposide.

• Bulletin of the Korean Chemical Society
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• 제25권3호
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• pp.343-344
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• 2004

• Bulletin of the Korean Chemical Society
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• 제23권8호
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• pp.1085-1088
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• 2002

Calix[6]arene having both carboxylic acid (1,3,5-) and carboxamide (2,4,6-) in an alternative way was synthesized. Transport rates of alkali and alkaline-earth metal ions were tested in bulk liquid membrane and polymer inclusion membrane. Ba2+ ion was found to give the highest transport rate among tested metal ions in both BLM and PIM systems. In PIM system, high durability (longer than 30 days) of the membrane was observed.

• Archives of Pharmacal Research
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• 제27권10호
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• pp.997-1000
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• 2004

A series of 1,3-dioxoindan-2-carboxylic acid arylamides were synthesized and evaluated for in vitro cytotoxicity against four human cancer cell lines (HOP62, SK-OV-3, MD-MB-468 and T- 47D). The most active was compound 3e (1.2 ${\mu}M$ against SK-OV-3 cell line) bearing a 4- methyl substituent.

• Bulletin of the Korean Chemical Society
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• 제9권6호
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• pp.352-355
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• 1988

${\alpha},{\beta}$-unsaturated carboxylic acid derivatives such as esters, amides, and nitriles are readily reduced to the corresponding saturated derivatives by potassium triphenylborohydride, $KPh_3BH$, in the presence of phenol, a quenching agent, in excellent yields.