• Natural Product Sciences
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• 제22권1호
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• pp.30-34
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• 2016

A simple and rapid method based on proton nuclear magnetic resonance spectroscopy was developed for determination of trans-anethole content in fennel essential oil. Spectra of pure trans-anethole, of the pure essential oil of fennel, and of the pure oil of fennel with thymol internal standard were recorded. The signal of $H-1^/$ was used for quantification of trans-anethole. This proton signal is well separated in the proton magnetic resonance spectrum of the compound. No reference compound is needed and cheap internal standard was used. The results obtained from spectroscopic analysis were compared with those obtained by gas chromatography. Additionally, the developed method was used for determination of the type of vegetable oil used as a carrier in commercial products, which cannot be quantified as such by gas chromatography. This study demonstrates the application of proton nuclear magnetic resonance spectroscopy as a quality control method for estimation of essential oil components.

• Journal of the Korean Wood Science and Technology
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• 제49권1호
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• pp.23-43
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• 2021

본 연구에서는 국내 자생식물 7종의 정유 중 우수한 항산화 효과가 있는 온주밀감, 육계나무 정유 2종을 선별하였고, 피부염을 유발하는 Candida albicans에 대한 항미생물 활성 평가를 통해 식물정유의 항미생물 활성성분을 구명하고자 하였다. 1,1-diphenyl-2-picrylhydrazyl (DPPH) 라디칼 소거활성 측정 결과 SC50값이 온주밀감 정유 0.010 mg/mL, 육계나무 정유 0.09 mg/mL을 나타냈으며, 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) 라디칼 소거활성 측정 결과 온주밀감 정유 0.09 mg/mL, 육계나무 정유 0.06 mg/mL로 높은 항산화 활성을 나타냈다. Minimum Inhibitory Concentration는 육계나무 정유 1.25 mg/mL, 온주밀감 정유 5 mg/mL 값으로 육계나무 정유에서 뛰어난 항미생물 활성이 나타났다. Thin layer chromatography (TLC) bioassay를 통해 2종 정유의 성분 분획에 따른 C. albicans에 대한 항미생물 활성을 평가하였고, preparative TLC (prep. TLC)를 통해 활성분획을 획득하고, 동일 Rf값을 가지는 성분들에 대해서 GC/MS 분석을 수행하여 항미생물 활성성분을 구명하였다. 그 결과 항산화 및 항미생물 활성을 나타내는 주성분은 각각 육계나무 정유의 경우 cinnamyl acetate, eucalyptol, linalool, citral 온주밀감 정유의 경우 linalool이었다. 2종 정유에 공통적으로 항산화 및 항미생물 활성을 나타낸 분획부 성분분석 결과 linalool은 항산화, cinnamyl acetate, eucalyptol, citral, geranyl acetate은 항산화와 항미생물 능력이 있다고 사료된다.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1512-1512
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• 2001

The University of Cordoba conducts since 1991 a breeding program to obtain new olive cultivars from intraspecific crosses. The objective is to obtain new early bearing and high-quality cultivars. In plant breeding, many seedlings must be tested to increased the chance of getting desirable genotypes. Therefore, fast, cheap and accurate methods of analysis are necessary. The conventional laboratory techniques are costly and time-consuming. Near Infrared Spectroscopy (NIRS) can satisfy the characteristics requested by plant breeders and offers many advantages such as the simultaneous analysis of many traits and cheap cost. The objective of this work was to asses the performance of NIRS to estimate oil fruit components (fruit weight, flesh moisture, flesh/stone ratio and oil flesh content in dry weight basis) and fatty acid composition in olive fruit. Genotypes from reciprocal crosses between ‘Arbequina’, ‘Frantoio’ and ‘Picual’ cultivars have been used in this study. A total of 287 samples, each from a single plant, were scanned using a DA-7000 Diode Array VIS/NIR Analysis System (Perten Instruments), which covers the visible and NIR range from 400-1700 nm. All samples were analysed for fatty acid composition (gas chromatography) and 220 for oil fruit components (oil content by nuclear magnetic resonance), 70% and 30% of samples were randomly assign for the calibration and validation sets respectively. The preliminary results shows that calibration for palmitic, oleic and linoleic acids were highly accurate with calibration and validation values of $r^2$ from 0.85 to 0.95 and 0.76 to 0.91 respectively. Calibration for palmitoleic and estearic acids were less accurate, probably because of the narrow range of variability available for these fatty acids. For the oil fruit components, calibration were high accurate for flesh moisture and oil flesh content in dry weight basis ($r^2$ higher than 0.90 in both calibration and validation sets) and less accurate for the other characteristics evaluated. The first results obtained indicate that NIRS analysis could be an ideal technique to reduce the cost, time and chemical wasted necessary to evaluate a large number of genotypes and it is accurate enough to use for pre-selecting genotypes in a breeding program.

• 로봇학회논문지
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• 제3권4호
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• pp.345-350
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• 2008

This study aims to propose the concept design of oil spill protection robot which can rapidly intervene to control the oil spillage situation at the sea. Taking into account the fact that a huge amount of oil is transported trans-continentally by oil tanker, none of industrialized countries are completely safe from the marine oil spill which results in social, economical and ecological damages to their communities. The employment of double hull-oil tanker, pipe line transporting can be most safe way. Yet complete prevention of oil spill is probably not realistic. Accordingly the alternative solution to control marine oil spill and minimize the damages caused by the incident using intelligent robot technology based on swarm control method is proposed. The main features of oil spill protection(OSP) robot is explained via following three perspectives. Firstly, from functional point of view, OSP robot system safely and efficiently replaces oil boom installation manually conducted by human workers with intelligent robot technology based on swarm control theory. For second, its modular architecture brings efficient storage of main components including oil boom and facilitates maintenance. For the last, its geometric form and shape enables whole system to be installed to helicopter, boat or oil tanker itself with ease and to rapidly deploy the units to the oil spill area.

• 한국작물학회지
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• 제54권1호
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• pp.24-28
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• 2009

This study was conducted to evaluate the growth characters and yield components of 18 collected sesame cultivars to get basic information on the variation for the sesame breeding using principal component analysis. All characters except days to flowering, days to maturity and 1,000 seed weight showed significantly different. Seed weight per 10 are showed higher coefficient of variance. Capsule bearing stem length and liter weight showed positive correlation with seed yield per 10 are. The principal components analysis grouped the estimated sesame cultivars into four main components which accounted for 83.7% of the total variation at the eigenvalue and its contribution to total variation obtained from principal component analysis. The first principal component ($Z_1$) was applicable to increase plant height, capsule bearing stem length and 1,000-seed weight. The second principal component ($Z_2$) negatively correlated with days to flowering and maturity by which it was applicable to shorten flowering and maturity date of sesame. At the scatter diagram, Yangbaek, Ansan, M1, M2, M4, M7 and M9 were classified as same group, but M10, Yanghuk, Kanghuk, M5, M6, M12 and M13 were classified as different group. This results would be helpful for sesame breeder to understand genetic relationship of some agronomic characters and select promising cross lines for the development of new sesame variety.

• 한국식품영양과학회지
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• 제26권2호
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• pp.209-213
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• 1997

민간요법에서 각종 질병치료에 사용되고 있는 어성초의 항균활성 물질을 규명하기 위한 목적으로 연속증류추출장치를 이용하여 포집한 휘발성 정유를 GC-MS로 각 성분을 분리 동정했다. 그 결과 어성초의 휘발성 정유는 GC column에서 52종의 화합물로 분리되었으며, 이중 44종의 화합물이 GC-MS에서 동정되었다. 밝혀진 화합물들은 terpene류 25종, aldehyde류 7종, alcohol류 4종, ketone류 3종 및 기타 5종이며, 이들 중 주요 화합물은 ${\beta}-myrcene$, ${\beta}-ocimene$, decanal, 2-undecanone 및 geranyl propionate이었다.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2010년 춘계학술대회논문집
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• pp.86-92
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• 2010

A metal diaphragm compressor has been widely used for supplying a high pressures gas. This compressor mainly consists of gas oil space and metal diaphragm. Gas sucked in the gas space is compressed by an oscillating metal diaphragm existed between the gas and oil space. A non-return discharge and suction check-valve are components of the compressor that draw off the compressed oil and gas. Those components are self-actuated by differential pressures. Therefore, the rapid response and stable operating conditions are required. In the present study, to find out the dynamic behavior of the suction, discharge valve and diaphragm compressor, the unsteady flow field has been investigated numerically by using the unsteady two-way FSI (Fluid Structure Interaction) simulation method, $k-{\omega}$ turbulent model and mesh deformation.

• 생약학회지
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• 제36권3호통권142호
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• pp.252-256
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• 2005

The in visto inhibitory activities of essential oils of the Rosmarinus officinalis as well as its main constituents were evaluated against antibiotic-susceptible and -resistant strains of Staphylococcus aureus, streptococcus pneumoniae, Salmonella enteritidis and S. typhimurium. The essential oil fraction of R. officinalis and its main components, 1,8-cineole and camphor, exhibited significant inhibitory activities against most of the tested strains in this study, with MICs(minimum inhibitory concentrations) racing from 0.5mg/ml to 16mg/ml. The total oil fraction showed higher activity than its main components, 1,8-cineole and camphor against S. aureus strains. No remarkable differences were evident between MICs of the susceptible and resistant strains of S. aureus. Among the tested strains, S. pneumoniae CCARM 3523, the resistant strain to norfloxacin, oxacillin and erythromycin exhibited significantly lower sensitivity to the tested oils than antibiotic-susceptible strain. The oils revealed mostly higher inhibitory activity against S. typhimurium than against S. enteritidis.

• 제어로봇시스템학회논문지
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• 제16권1호
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• pp.12-17
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• 2010

The oil tanker ship over 150GRT must equip oil content meter which satisfy requirements of revised MARPOL 73/78. Online measurement of oil content in complex samples is required to have fast response, continuous measurement, and satisfaction of ${\pm}10ppm$ or ${\pm}10%$ error in this field. The research of this paper is to develop oil content measurement system using analysis of light transmission and scattering among turbidity measurement methods. Light transmission and scattering are analytical methods commonly used in instrumentation for online turbidity measurement of oil in water. Gasoline is experimented as a sample and the oil content approximately ranged from 14ppm to 600ppm. TSK Fuzzy Model may be suitable to associate variously derived spectral signals with specific content of oil having various interfering factors. Proposed Parallel TSK Fuzzy Model is reasonably used to classify oil content in comparison with other models. Those measurement methods would be effectively applied and commercialized to oil content meter that is key components of oil discharge monitoring control equipment.

• 한국식품영양과학회지
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• 제26권6호
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• pp.1033-1038
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• 1997

Antioxidant effect of several antioxidative components on the high purity $\alpha$-linolenic acid(HALA; ALA, 78.1%) ethyl ester concentrated from perilla oil were investigated by measuring weight-gains and peroxide value(POV) during storage at 5$0^{\circ}C$, 23$^{\circ}C$ and 4$^{\circ}C$. Amounts of antioxidant components were 0.2g/kg HALA ethyl ester for sesamin, sesangolin and butylated hydroxytolune(BHT), and 0.1g/kg for sesamol and 100g/kg for ether extracts from perilla seed. The oxidative stability of HALA ethyl ester was particularly increased by adding sesamol, ether extracts and BHT, but sesamin and sesangolin scarcely showed an antioxidant effect. POV on the HALA ethyl ester added sesamol and ether extract was less than 15.0meq/kg by 9 weeks of storage at 23$^{\circ}C$. However, in the case of low temperature storage at 4$^{\circ}C$, all the samples estimated showed less than 7.0meq/kg in POV by 5 months. Consequently, sesamol and ether extracts were recognized as available antioxidant components on the HALA ethyl ester from perilla oil.