• Bulletin of the Korean Chemical Society
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• 제31권5호
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• pp.1424-1426
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• 2010

• Bulletin of the Korean Chemical Society
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• 제32권10호
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• pp.3559-3560
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• 2011

• 한국식품과학회지
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• 제29권4호
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• pp.623-625
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• 1997

한국산 양다래의 저장기간이 향기성분의 변화에 미치는 영향을 구명하고자 $20^{\circ}C$ 저장시료의 향기성분의 변화를 저장기간별로 측정하여 비교하였다. 동시증류 추출방법에 의해서 pentanal, methyl butanoate, ethyl butanoate, hexanal, propyl butanoate, ethyl pentanoate, heptanone, (E)-2-hexenal, ethyl hexanoate, 1-hexanol, cyclohexanol, butyl hexanoate, linalool oxide, linalool, butyl hepatanoate, methyl benzoate, ethyl benzoate가 GC/MS로 동정되었다. 저장기간에 따라 (E)-2-hexenal과 ethyl butanoate의 함량변화가 많았다. 숙성이 되지 않은 상태에서는 풋풋한 향기의 원인물질인 (E)-2-hexenal이 다량 존재하였으나 ethyl butanoate는 발견되지 않았다. 그러나 숙성과정이 진행됨에 따라서 (E)-2-hexenal은 감소하였으며 향긋한 과일향을 나타내는 ethyl butanoate는 급격히 상승하였다.

• 약학회지
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• 제19권2호
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• pp.96-100
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• 1975

2-Ethoxy-4-acetamidobenzoate (III) was synthesized by ethylation of N-formyl compound obtained with formylation of methyl 4-aminosalicylate and 2-ethoxy-4-acetamidobenzamide (VIII) was synthesized by ethylation of 4-acetamidosalicylamide (VII) formed by reacting methyl 4-acetamido-2-acetoxy benzoate with concentrated ammonia water under pressure. 2-Ethoxy-4-acetamido benzamide (VIII) was also synthesized by acetylation of 2-ethoxy-4-aminobenzamide (VI) obtained by pressure eraction of methyl 2-ethoxy-4-formylamido-benzoate (I) with concentrated ammonia water.

• 대한화장품학회지
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• 제11권1호
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• pp.13-20
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• 1985

Polyoxyethylene계 유화제를 이용한 유화계에 있어서 talc 및 $TiO_2$에 의한 methyl p-hydroxy benzoate의 흡착과 그에 따른 방부력 감소를 여러 가지 분석방법과 미생물 실험을 통하여 측정하였다. 이 유화계에 있어서 methyl p-hydroxy benzoate는 talc 및 $TiO_2$에 흡착되어 방부력이 감소함을 알 수 있으며 방부력 저하에 미치는 영향은 $TiO_2$보다 talc가 더 크고, talc에 의한 methyl p-hydroxy benzoate의 흡착량은 $20^{\circ}C$에서 다음과 같은 식으로 나타낼 수 있었다. 즉 $a=11.511C^{0.747}$

• 한국식품위생안전성학회지
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• 제14권2호
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• pp.140-145
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• 1999

Analytical method for preservatives in food was developed using gas chromatography/mass spectrometry (GC/MS). Propionic acid, sorbic acid, benzoic acid, ethyl salicylate, ethyl p-hydroxy benzoate, iso-propyl p-hydroxy benzoate, n-propyl p-hydroxy benzoate, iso-butyl p-hydroxy benzoate, n-butyl p-hydroxy benzoate, p-hydroxy benzoic acid and dehydro acetic acid were extracted from cooling beverage with diethyl ether. The polar hydroxyl and carboxyl groups of food preservatives were derivatized with N-methyl-N-tert-butyldimethylisilyl-trifluoroscetamide (MTBSTFA) to form the corresponding tert-bytyldimethyl-silylated derivatives, and submitted to GC/MS analysis. The mass spectra of the derivatives were investigated for the selection of monitoring ions for multi-residue analysis of 11 preservatives by GC/MS. The macro program was also developed for the qualitative analysis of these preservatives in food.

• 농약과학회지
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• 제6권2호
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• pp.80-86
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• 2002

시판되고 있는 40종 살충제의 꽃노랑총채벌레(Frankliniella occidentalis) 성충에 대한 약제감수성을 검토한 결과 80%이상의 살충율을 보인 약제는 chlorfenapyr, chlorpyrifos-methyl, emamectin benzoate, fenthion, fipronil, phenthoate, spinosad, chlorpyrifos+diflubenzuron, furathiocarb+diflubenzuron이었다. 이들 약제에 대해 전국 5개 지역 장미재배지에서 채집한 지역집단의 약제감수성을 실험한 결과 고양과 김해집단이 임실, 진천, 강진집단보다 전반적으로 $LC_{50}$(ppm)값이 높았다. 그러나 emamectin benzoate, fipronil, spinosad는 모든 집단에서 $LC_{50}$이 1ppm이하로 낮게 나타났다.

• Food Science and Biotechnology
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• 제14권1호
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• pp.73-76
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• 2005

The acaricidal activities of 12 commercial constituents derived from Eugenia caryophyllata leaf oils against Dermatophagoides farinae, D. pteronyssinus and Tyrophagus putrescentiae adults were examined using an impregnated fabric disk application and compared with that of the commercial benzyl benzoate as synthetic acaricide. On the basis of $LD_{50}$ values, the most toxic compound was methyl eugenol ($4.13\;{\mu}g/cm^2$), followed by methyl isoeugenol ($4.19\;{\mu}g/cm^2$), isoeugenol ($4.29\;{\mu}g/cm^2$), eugenol ($4.94\;{\mu}g/cm^2$), and acetyl eugenol ($13.91\;{\mu}g/cm^2$) against D. farinae. In the case of D. pteronyssinus, isoeugenol ($2.93\;{\mu}g/cm^2$) was the most toxic, followed by methyl isoeugenol ($3.28\;{\mu}g/cm^2$), methyl eugenol ($3.87\;{\mu}g/cm^2$), eugenol ($3.92\;{\mu}g/cm^2$), and acetyl eugenol ($7.21\;{\mu}g/cm^2$). These results suggest that D. pteronyssinus may be controlled more effectively by the application of eugenol congeners than D. farinae. In comparison with synthetic acaricides, the acaricidal activities of eugenol, isoeugenol, methyl eugenol, and methyl isoeugenol were about 1.9-2.2 times more toxic than benzyl benzoate. Furthermore, the most toxic constituent against T. putrescentiae was exhibited on eugenol ($10.11\;{\mu}g/cm^2$), followed by methyl eugenol ($38.67\;{\mu}g/cm^2$) and acetyl eugenol ($70.09\;{\mu}g/cm^2$), but no activity was observed for isoeugenol and methyl isoeugenol. The results suggested that eugenol congeners may be useful as a new source for selective control of house dust mites and stored food mites.

• Natural Product Sciences
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• 제27권3호
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• pp.169-171
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• 2021

A new phenolic compound and three known flavonoids isolated from the MeOH extracts of Lespedeza tomentosa. Based on spectral data, the isolated compounds were identified as methyl 4,5-dihydroxy-3-methoxy-2-(3-methylbut-2-en-1-yl)benzoate (1), 1-methoxylespeflorin G₁₁ (2), farrerol (3) and 1-methoxylespeflorin I₂ (4). Methyl 4,5-dihydroxy-3-methoxy-2-(3-methylbut-2-en-1-yl)benzoate (1) is newly isolated from plant source.

• Journal of Photoscience
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• 제12권1호
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• pp.41-46
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• 2005

We synthesized chiral choleseric liquid crystalline monomer p-phenylene bis-(p-3-acryloxy-2(S)-methylpropoxy)benzoate (1) and achiral nematic liquid crystalline monomer, p-phenylene p-acryloxy-6-hexyloxy-p-octyloxybenzoate (2) for the construction of cholesteric polymer network with a pitch gradient. In this research we attempted to synthesize cholesteric polymer film which have a wide reflection bandwidth in the region of visible wavelength with the synthesized chiral cholesteric monomer 1 and nematic monomer 2 under various photopoly merization conditions. We succeeded to construct cholesteric polymer film network with a pitch gradient covering more than 200 nm bandwidth in the visible wavelength by diffusion controlled photostructuring method.