• Food Quality and Culture
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• 제2권2호
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• pp.67-72
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• 2008

The volatile flavor compounds of wild and cultivated chamnamul (Pimpinella brachycarpa), an aromatic medicinal plant, were isolated via the simultaneous distillation extraction method and analyzed by GC and GC-MSD. From the oils of the wild chamnamul, 56 volatile flavor compounds were identified, and the major constituents were found to be sabinene (58.37 ppm) and germacrene-D (45.73 ppm). From the oils of cultivated chamnamul, 36 volatile flavor compounds were identified--the major constituents were identified as $\beta$-selinene (38.41 ppm) and myrcene (12.76 ppm).

• 한국해양바이오학회지
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• 제1권4호
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• pp.232-242
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• 2006

Bioactive compounds produced by microorganisms have focused on in recent years. In particular, novel compounds showing anti-cancer activity have been isolated from marine microorganisms. In this review, we will discuss on the studies of new bioactive compounds derived from marine bacteria with conjunction to anti-cancer activity. This review will provide an information and source for bioactive compounds showing anti-cancer activity, which were derived from marine bacteria.

• Archives of Pharmacal Research
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• 제3권2호
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• pp.87-88
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• 1980

The goal of this research is to provide information that will lead to the development of new non-phototoxic antimalarial compounds. The goal was approached by first learning the chemical mechanism of phototoxicity of six representative compounds 1a-f: a[(diethyl-, -dihexyl-, and -dioctyl- aminomethyl)]-2-(3', 4' -dichlorophenyl)-6-methoxy-4-quinolinemethanol (1a, 1b, and 1c) and .alpha. [(diethyl-, -dibutyl-, and -dihexyl-aminomethyl)]-2-(-4'-methoxyphenyl-6-methoxy-7-chloro-4-quinolinemethan ol (1d, 1e, and 1f). The photochemical reaction of these compounds was investigated in 2-propanol. Similar photochemical fragmentation reactions accurred in all compounds.

• Bulletin of the Korean Chemical Society
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• 제22권11호
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• pp.1207-1212
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• 2001

A new photochemically bifunctional epoxy and dimethacrylate compounds were synthesized for investigating the photosensitivity under UV irradiation. Photosensitivity of the synthesized chalcone-based compounds was investigated by using UV-visible absorption and Fourier transformed infrared (FT-IR) spectroscopies. The result of spectroscopic analysis substantiated that the two chalcone-based compounds have functions of both photocrosslinking and photopolymerization by UV exposure in the presence of photoinitiator. Two kinds of photochemical reactions proceeded competitively during UV exposure. Particularly, we studied the effect of photopolymerization on the rate of photocrosslink due to cycloaddition in the two oligomeric compounds.

• Bulletin of the Korean Chemical Society
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• 제13권2호
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• pp.184-187
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• 1992

Regeneration methods of oximes, hydrazones, and N,N-dimethylhydrazones to the related carbonyl compounds were effected using various dicarbonyl compounds which are activated with electron withdrawing substituents such as trifluoromethylated $\beta-diketones$, $\beta-acylpyruvates$, and $\alpha-diketones$ via an equilibrium exchange reaction. The chemical transformations of the dicarbonyl compounds in the exchange reaction were investigated by various spectroscopic methods.

• 생명과학회지
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• 제18권11호
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• pp.1570-1577
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• 2008

오만둥이된장찌개의 가열조리에 따른 열유도반응물질을 규명하여 오만둥이를 이용한 가공기술의 기초자료를 제공하고자 향기성분을 분석하였다. 총 128종의 휘발성 향기성분은 에스테르류(16종), 방향족화합물류(14종), 함질소화합물류(11종), 알콜류(34종), 테르펜류(5종), 카르보닐화합물류(23종), 퓨란류(4종), 탄화수소류(13종), 산류(5종) 및 기타화합물류(3종)로 구성되어 있었다. 된장의 향기성분은 방향족화합물, 알콜류 및 산류의 순으로 많았고, 가열 반응 후 pentanoic acid (불쾌취)는 감소하였으며 열유도 화합물인 furfural을 주로 한 퓨란류가 약 2배로 증가하였다. 오만둥이의 향기성분은 decenol, 2,6-dimethylheptanol 및 octanol이 주된 성분인 알콜류, 탄화수소류 및 방향족화합물 순으로 많았다. 가열 반응 후에는 pentanol의 함량이 증가하였고, 함질소아미노산과 카르보닐화합물의 열유도화합물인 2-acetyl-2-thiazoline 및 benzothiazole과 같은 함황고리화합물이 생성되었다. 오만둥이 된장국에서는 오만둥이에서 유리되는 decenol 및 2,6-dimethylheptanol을 주로한 알콜류, 방향족화합물, 탄화수소류 및 된장가열 후 생성된 benzeneacetaldehyde가 주된 카르보닐 화합물이 많았다. 즉 오만둥이 된장국은 독특한 오만둥이향을 함유한 동시에 된장의 구수한 향미를 보유함을 알 수 있었다

• 한국전기전자재료학회논문지
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• 제28권11호
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• pp.727-730
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• 2015

In this paper, we fabricated organic compounds detector using the MWCNT/PMMA (multi-walled carbon nanotube / polymethylmethacrylate) composite film. We used polymer film as a matrix material for the device framework, and introduced CNTs for reacting with the organic compounds resulting in changing electrical conductivity. Spray coating method was used to form the MWCNT/PMMA composite film detector, and pattern formation of the detector was done by shadow mask during the spray coating process. We investigated changes of electrical conductivity of the detector before and after the organic compounds exposure. Electrical conductivity of the detector tended to decrease after the exposure with various organic compounds such as acetone, tetrahydrofuran (THF), toluene, and dimethylformamide (DMF). Finally we conclude that organic compounds detection by the MWCNT/PMMA composite film detector was possible, and expect the feasibility of commercial MWCNT/PMMA composite film detector for various organic compounds.

• 한국환경과학회지
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• 제17권1호
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• pp.19-27
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• 2008

Artichoke extracts are widely used alone or in association with other herbs for embittering alcoholic and soft drinks and to prepare herbal teas or herbal medicinal products in Viet Nam. The objective of this paper was a screening of flavonoids and total phenolic compounds content in the parts of artichoke (Cynara scolymus L.) as flowers, leaves, roots, trunks, stumps, The total phenolic compounds and flavonoids in the parts of artichoke were extracted among 3 extraction methods as methanol extraction (EM1), mixing methanol and water method (EM2) and water extraction method (EM3). Total phenolic compounds and flavonoids were determined by UV/VIS, HPLC techniques. The apigenin 7-O-glucosides, cynarin, narirutin, gallic acid, caffeic acid were found as the main flavonoids constituents in all parts of artichoke. It showed that value of total phenolic compounds and flavonoids by EM3 were higher than that of total phenolic compounds and flavonoids by EM1 and EM2. Furthermore, the results of this study revealed that total phenolic compounds and flavonoids, obtained by these convenient extraction methods, may show the quick efficacy of artichoke in all respects of their quality and quantity.

• 상하수도학회지
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• 제21권3호
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• pp.295-303
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• 2007

Nitrogen compounds in municipal wastewater can be divided into biodegradable and nonbiodegradable fractions with biodegradability. Biodegradable nitrogen compounds can be removed through biological nitrification and denitrification processes, and nonbiodegradable nitrogen compounds affect the effluent quality of biological nutrient removal processes. The amount of nitrifiable nitrogen compounds, which are the sum of ammonia and biodegradable organic nitrogen, has been estimated by respirometry. Respirometry shows good estimation of the concentration of nitrifiable nitrogen when a synthetic sample of ammonium chloride is dosed. The estimated concentration of nitrifiable nitrogen compounds in municipal wastewater is close to ammonia concentration in municipal wastewater, but it is lower than that for the synthetic sample. If nitrogen assimilated into cell synthesis of nitrifiers and heterotrophs is considered, the total amounts of nitrifiable nitrogen compounds, which are nitrified and assimilated, could be more accurately estimated. The concentration of nitrifiable nitrogen compounds, which are biodegradable, is about 31 mg N/l, and this is 119% of ammonia and 94% of total nitrogen. Ammonia, nitrate, biodegradable organic nitrogen, and nonbiodegradable nitrogen are about 79%, 1%, 15%, and 5% of the total nitrogen in municipal wastewater, respectively.

• 생약학회지
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• 제38권2호통권149호
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• pp.164-169
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• 2007

ln our continued search for biologically active compounds from traditional medicine, we found that ethyl acetate fraction from Inonotus obliquus showed potent antioxidant activities on three different cell-free bioassay systems. Bioassay-directed chromatographic fractionation of the ethyl acetate fraction from Inonotus obliquus afforded four phenolic compounds, 4-(3,4-dihydroxyphenyl)-(E)-3-buten-2-one (1) , 3,4-dihydroxybenzaldehyde (2), protocatechuic acid (3) and caffeic acid (4) along with three sterols such as lanosterol (5), ergosterol peroxide (6) and 9,11-dehydroergosterol peroxide (7). Among isolates, phenolic compounds (1-4) were assessed for antioxidant activities. Almost phenolic compounds showed potent DPPH and superoxide anion radicals scavenging and lipid peroxidation inhibitory activities indicating that these phenolic compounds contribute to the antioxidative activities of I. obliquus. Compounds 2-3 and 7 were isolated for the first time from this plant.