• The Magazine for Energy Service Companies
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• s.82
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• pp.52-59
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• 2013

본 문서는 지금까지의 심사 및 기술 지도 경향을 바탕으로 ISO50001 에너지경영시스템(EnMS) 규격에서 정한 요구사항의 핵심을 알기 쉽게 설명함으로서 기업에서 에너지경영을 실제로 도입하여 운영하고자 할 때 도움을 드리고자 제작되었다. 에너지경영시스템 요구사항 해설 I은 지 81호에서 확인할 수 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.3
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• pp.707-725
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• 2021

Energy management systems (EnMS) contribute to sustainable energy saving and greenhouse gas reduction by emphasizing the role of energy management in production-oriented economies. Although understanding the methods used to measure energy performance is a key factor in constructing successful EnMS, few attempts have been made to examine these methods, their applicability, and their utility in practice. To fill this research gap, this study aimed to deepen the understanding of energy performance measures by focusing on four energy performance indicators (EnPIs) proposed by ISO 50006, namely the measured energy value, ratio between measured values, linear regression model, and nonlinear regression model. This paper presents policy and managerial implications to facilitate the effective use of these measures. An analytic hierarchy process (AHP) analysis was conducted with 41 experts to analyze the preference for EnPIs and their key selection criteria by the industry sector, and organization and user type. The findings suggest that the most preferred EnPI is the ratio between the measured values followed by the measured energy value. The ease of use was considered to be most important while choosing EnPIs.

• Archives of Pharmacal Research
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• v.27 no.7
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• pp.734-737
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• 2004

5,8-Epidioxycholest-6-en-3-ol (1), cholesterol (2), glycerol 1-palmitate (3) and glycerol 1,3-dioleate-2-stearate (4) were isolated from the methanol extract of the sea urchin Diadema setosum, which was collected from the Halong sea, Vietnam. Chemical structures were established based on extensive 1D, 2D-NMR, FAB-MS, EI-MS spectroscopic data and GC-MS analysis. The NMR spectral data of compound 1 were reassigned by using HMQC and HMBC. Compound 1 was found to have strong cytotoxic effect against various cancer cell lines, such as KB ($IC_{50}$, 2.0 $\mu\textrm{g}$/mL), FL($IC_{50}$, 3.93 $\mu\textrm{g}$/mL), and Hep-2 ($IC_{50}$, 2.4 $\mu\textrm{g}$/mL) by in vitro assay.

• Analytical Science and Technology
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• v.22 no.5
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• pp.376-385
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• 2009

In our study, the accuracy for measurement of seventeen 2,3,7,8-substituted PCDDs/PCDFs in certified reference material (CRM) which is the sample of homogeneous sediment matrix taken from an area known to have significant chemical contamination, particularly PCBs (polychlorinated biphenyls), was evaluated. Though the methodology in this study followed the official method of unintentionally produced persistent organic pollutants (UPOPs) announced by the Ministry of Environment of the Republic of Korea in 2007, there were slight changes using additional purification step by activated carbon column because the interferences of sample were not sufficiently removed when only multi-silica column and alumina column have been used for purification. The |En| number proposed by the Korea Research Institute of Standards and Science was used for a valuation basis of the accuracy. The |En| numbers of seventeen 2,3,7,8-substituted PCDDs/PCDFs have been indicated as 1 and below, they were decided "Pass" in this test, when DB-5MS column and SP-2331 column were used together. Because 1,2,3,7,8-PeCDD and #169-HxCB were not separated on DB-5MS column, the ions of 1,2,3,7,8-PeCDD were selected at M/M+2 instead of M+2/M+4 suggested by EPA 1613. It is possible to distinguish them in HRGC/HRMS analysis.

• Journal of the Korean Society for Heat Treatment
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• v.3 no.1
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• pp.65-69
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• 1990

Gas침탄질화처리 후 20Cr-2Ni-4A, 25Mn-Ti-B-Re, 20Cr-Mn-Ti 3가지 다성분강에서의 Ms온도를 계산하는 방법이 개발되어 왔으며, 결과적으로 각각의 gas 침탄질화층에 있는 잔류 austenite의 양이 계산될 수 있다. 이렇게 계산된 결과는 전형적인 실험 결과와 좋은 일치를 보이며, 그 예로서 En 354 강에서 침탄층을 통한 Ms 온도 분포가 계산되어진다.

• The Magazine for Energy Service Companies
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• s.81
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• pp.62-69
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• 2013

• Journal of Microbiology and Biotechnology
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• v.27 no.2
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• pp.234-241
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• 2017

Potato peels (PP) contain several bioactive compounds. These compounds are known to provide human health benefits, including antioxidant and antimicrobial properties. In addition, these compounds could have effects on human enteric viruses that have not yet been reported. The objective of the present study was to evaluate the phenolic composition, antioxidant properties in the acidified ethanol extract (AEE) and water extract of PP, and the antiviral effects on the inhibition of Av-05 and MS2 bacteriophages, which were used as human enteric viral surrogates. The AEE showed the highest phenolic content and antioxidant activity. Chlorogenic and caffeic acids were the major phenolic acids. In vitro analysis indicated that PP had a strong antioxidant activity. A 3 h incubation with AEE at a concentration of 5 mg/ml was needed to reduce the PFU/ml (plaque-forming unit per unit volume) of Av-05 and MS2 by 2.8 and $3.9log_{10}$, respectively, in a dose-dependent manner. Our data suggest that PP has potential to be a source of natural antioxidants against enteric viruses.

• Applied Biological Chemistry
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• v.46 no.4
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• pp.376-379
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• 2003

The aerial parts of tile Garland (Chrysanthemum comnarium L.) were extracted in MeOH and solvent fractionated with EtOAc, n-BuOH and water, successively. EtOAc fractions gave three steroid compounds through application of silica gel column chromatographies. The chemical structures of the steroids were determined by the interpretation of several spectral data, including NMR and MS as $stigmast-5-en-3{\beta}-ol\;(1,\;{\beta}-sitosterol),\;stigmast-4-en-6{\beta}-ol-3-one$ (2), $stigmast-4-en-6{\alpha}-ol-3-one$ (3). Compounds 2 and 3 have been so far reported only in the aquatic plants, were isolated for the first time from the land plants.

• Journal of the Korean Wood Science and Technology
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• v.24 no.1
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• pp.27-33
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• 1996

The aim of this research was to investigate the chemical components of C30 compounds, especially triterpenoids in Korean native mistletoes of Korthalsella japonicus Engler parasiting to Camellia japonica L., Viscum album var. coloratum (Kom.) Ohmi, to Quercus acutissima Carruth. and Loran-thus yadoriko Sieb. to Neolitsea sericea (BI.) Koidz. For the identification of triterpenoidal components, alkaline hydrolyzates of mistletoes meals were analyzed by TLC, GC, and GC/MS. The content of oleanolic acid and ursolic acid derivatives were highest in K. japonica. In V. album, there was no big difference between leaves and twigs in content. but oleanolic acid in leaves. and olean-12-en-$3{\beta}$-ol and lup-20(29)-en-3-one in twigs were prominent. Similiar to V. album in L. yadoriki there was no difference between leaves and twigs in content, and both olean-12-en-$3{\beta}$-ol, lup-20(29)-en-3-one and urs-12-en-$3{\beta}$-ol in leaves, lup-20(29)-en-3-one in twigs were abundant. Triterpenoids as olea-12-en-$3{\beta}$-ol, lupe-20(29)-en-3-one, 3-oxo-urs-12-en-24-oic acid, and $21{\beta}$-A'-neogam-macer-22(29)-en-3-ol acetate were common in all samples tested. whereas ursolic acid only in P. japonicus and ursenol in L. yadoriki were detected. And P. japonicus had the largest number of triterpenoids and showed the highest in biological activity. So it is noted that Korean mistletoes tested in the study had three types of triterpenoid, oleanane, lupane, and ursane, irrespective of hosts, sampling positions and species.

• Archives of Pharmacal Research
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• v.28 no.5
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• pp.550-556
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• 2005

The flower of Campsis grandiflora K. Schum. Was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and H$_2$O. From the EtO Ac fraction, seven triterpenoids were isolated through the repeated silica gel, ODS column chromatographies and preparative HPLC. From the result of physico- chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as 3${\beta}$-hydroxyolean-12-en-28-oic acid (oleanolic acid, 1), 3${\beta}$-hydroxyurs-12-en-28-oic acid (ursolic acid, 2), 3${\beta}$-hydroxyurs-12-en-28-al (ursolic aldehyde, 3), 2${\alpha}$,3${\beta}$-dihydroxyolean-12-en-28-oic acid (maslinic acid, 4), 2${\alpha}$,3${\beta}$-dihydroxyurs-12-en-28-oic acid (corosolic acid, 5), 3${\beta}$,23-dihydroxyurs-12- en-28-oic acid (23-hydroxyursolic acid ,6) and 2${\alpha}$,3${\beta}$,23-trihydroxyolean-12-en-28- oic acid (arjunolic acid, 7). These teriterpenoids were isolated for the first time from this plant. Also, compounds 4, 5, 6, and 7 revealed relatively high hACAT-1 inhibitory activity with the value of 46.2${\pm}$1.1, 46.7${\pm}$0.9, 41.5${\pm}$1.3 and 60.8${\pm}$1.1% at the concentration of 100${\mu}$g/mL, respectively.