• Bulletin of the Korean Chemical Society
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• 제23권3호
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• pp.507-508
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• 2002

• Bulletin of the Korean Chemical Society
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• 제30권6호
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• pp.1391-1393
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• 2009

• Bulletin of the Korean Chemical Society
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• 제31권6호
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• pp.1765-1768
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• 2010

• Bulletin of the Korean Chemical Society
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• 제25권1호
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• pp.136-138
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• 2004

• Bulletin of the Korean Chemical Society
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• 제25권11호
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• pp.1729-1732
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• 2004

• Archives of Pharmacal Research
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• 제14권4호
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• pp.342-345
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• 1991

Synthesis of series of 3-benzalphthalidyl-amino acids and their corresponding methyl esters, dipeptides and tripeptide methyl esters 2a-7c is decribed. All 3-benzalphthalidynamino acids 2a-g were found to possess a remarkable antimicrobial properties against a number of microorganisms and fungi.

• Journal of Nutrition and Health
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• 제40권5호
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• pp.413-418
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• 2007

The present study was designed to observe the effect of chronically ingested ethanol on the level of fatty acid ethyl esters (FAEEs), which is a non-oxidative metabolite of ethanol metabolism in tissues, and its correlation to the status of oxidative stress in rats. Forty male Sprague Dawley rats weighing 145 - 155 g were divided into 2 groups, Control and EtOH. All rats were fed Lieber-DeCarli liquid diet for 4 weeks by pair-feeding. An isocaloric maltose dextrin was added in replace of 50 g ethanol (36%kcal) in the control diet. Chronically ingested ethanol significantly increased the content of FAEEs in pancreas and liver, but not in brain. The level of 2-thiobarbituric acid reactive substances (TBARS) was significantly increased, but ${\alpha}-tocopherol$ level was significantly decreased in pancreas and liver. However, the levels of TBARS and ${\alpha}-tocopherol$ in brain were not significantly affected by ethanol ingestion. Therefore, chronically ingested ethanol might cause tissue damage by increasing the levels of FAEEs and TBARS and dissipating more ${\alpha}-tocopherol$ in tissues.

• Applied Biological Chemistry
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• 제32권2호
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• pp.143-147
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• 1989

McIntosh apple을 climacteric maximum 시기인 9월 25일에 채취하여 향기성분을 추출, 분리 및 동정한 결과 head space법에 의한 향기성분은 etsers 13종, alcohols 6종, aldehyde 및 ketone 각 1종으로 총 21종을 동정하였다. 연속수증기증류법에 의해 동정된 향기성분은 esters 20종, alcohols 14종, aldehydes 2종 및 ketone 1종으로 총 37종을 동정하여 head space법보다 16종을 더 동정할 수 있었다. 두 방법에 의해 동정된 향기성분 중 모두 ester가 가장 많아 사과에서 가장 중요한 향기성분이었으며 다음이 alcohol이었다.

• Bulletin of the Korean Chemical Society
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• 제32권3호
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• pp.915-920
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• 2011

Four esters of succinic and maleic acid were synthesized, separated by thin-layer chromatography (TLC), and identified using matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS). A comparison of matrix materials showed that 2,6-dihydroxybenzoic acid (2,6-DHB) yielded a greater ionization efficiency than 2,5-DHB prior to TLC separation. The location of each ester sample on the TLC plate was estimated by comparing the developed plate with a duplicate plate that had been visualized by immersion in a $KMnO_4$ solution. Generally, mass spectra obtained from the $KMnO_4$-visualized plate were relatively poor. Reproducible mass spectra with high peak abundance were difficult to obtain using the 2,6-DHB matrix from crude synthetic esters extracted from the TLC plates. Significant improvements in both reproducibility and sensitivity were realized by using pencil lead as the MALDI matrix. The current methodology will be beneficial to organic chemists since it can provide a guideline for simple and rapid characterization of small organic compounds.

• Elastomers and Composites
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• 제49권4호
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• pp.313-322
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• 2014

난연제 가운데 가장 많이 사용되는 할로겐 함유 난연제는 사용상 환경적인 제한을 받고 있어서 비할로겐타입인 인계에 기초한 난연제가 각광을 받고 있다. 난연제는 수지에 가해지는 경우에 흔히 열분해와 기계적 특성저하를 일으킨다. 물성의 열화를 최소화하고 충분한 난연성을 얻기 위한 시도로 새로운 난연제에 대한 연구를 수행하였다. 본 연구에 있어서는 diaryl alkyl phosphate esters, aromatic phosphate esters 및 phosphonium nitron 난연제 등 세가지 형태의 비할로겐 인계에 기초한 난연제를 합성하여 GC, IR 및 TGA 등으로 합성 및 열적 특성을 확인하였다.