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        검색결과 34

        1.
        2022.10 구독 인증기관·개인회원 무료
        In 2004, in order to comply with UN Security Council Resolution 1540, the European Union (EU) came into force with Regulation 428/2009 for the export control of dual-use items, which has been working to prevent the proliferation of weapons of mass destruction (WMDs). In August 2021, it amended the EU 821/2021 to include mandating the introduction of ICPs for exporters in the member countries in order to strengthen controls over the transfer of tangible and intangible technologies. The main contents are as follows; 1) Mandatory introduction of Internal Compliance Program (ICP): Exporters within the EU countries should introduce a transaction review procedure through the ICP in consideration of their size and organization. 2) Export control on Cyber Surveillance Items to protect human rights: In order to protect human rights and comply with the obligations of international human rights law, EU countries should implement export controls on cyber-monitoring items exported from customs zones in the EU. Cyber surveillance items are specially designed to monitor, extract, collect or analyze data such as biometrics through intrusion of information and communication systems or deep packet hijacking. However, items used for purely commercial programs such as billing, marketing, quality service, user satisfaction or network security are excluded. 3) Expansion of the Catch-all system: EU countries should utilize the catch-all system to strengthen export controls on cyber-monitoring items, including dual-use items. 4) Strengthening control over the cloud: Exporters and EU countries should extend the scope of intangible technology transfer, such as electronic media, fax, and telephone, outside the EU’s customs territory, and apply export control regulations such as general or comprehensive licenses to cloud transmissions outside the EU territory. 5) Introduction of large-scale project authorization: To reduce the administrative burden on enterprises (especially small and medium-sized enterprises) and authorities when exporters with individual or collective licenses export to one or more specific end-users for the purpose of large scale projects, provided that they ensure the implementation of an appropriate level of export controls; EU countries may introduce large-scale project license systems in the form of general authorization. Recently, there is a possibility that the ROK would export its nuclear technologies including APR1400 to the EU member countries in the midst of the EU adoption of carbon-zero policy. In this paper, we have analyzed the EU export control regulations and suggested the future direction of nuclear export control programs in the ROK.
        3.
        2007.03 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        국내 경수로원전 1차 냉각재와 중저준위 방사성폐기물 내 핵종방사능비에 대한 유관성을 검토하고자 특수하게 제작된 RCS sampling kit를 이용하여 원전 정상운전기간 동안 핵종을 포집하였다. 시료채취는 경수로형 전 원자력 발전소를 대상으로 2004년과 2005년에 걸쳐 시료를 채취하였고, 방사화학적 방법인 시료 전처리 및 핵종분리를 통하여 핵종 방사능을 분석하였다. RCS sampling kit 내 필터와 수지에서 분석된 핵종 방사능비는 각각 2.32-2와 7.3E-1을 보였으며, 동일주기 내 발생된 중 저준위 방사성폐기물인 농축폐액, 폐수지, 잡고체시료 내 핵종 방사능비는 각각 6.3E-1, 6.7E-1 및 5.7E-2로 시료유형 에 따라 1차 냉각재와 유사성을 갖는 것으로 확인하였다.
        4,000원
        4.
        2018.05 서비스 종료(열람 제한)
        Background : Tropospheric ozone (O3) is a secondary air pollutant that negatively affects numerous agricultural crop and forest. The tropospheric ozone is constantly increasing due to fossil fuel air pollutants. Here, we study the response of tartary buckwheat to ozone gas includes physiological and biochemical changes such as change in gene expression and metabolism. Methods and Results : Tartary buckwheat plants have green stems and leaves under normal conditions, while the plants exposed to the ozone have red stems and reddish green leaves. The expression of most flavonoid biosynthetic genes were significantly upregulated in ozone-treated buckwheat plants, exceting the expression of FtF3’H2. The contents of two anthocyanins, cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside, were significantly increased by ozone treatment. From the metabolic profiling based on the GC-TOF-MS analysis, we identified the effect of ozone on thirty-five metabolites, including sugars, amino acids, and organic acids. Most of the metabolites result in significantly decreased or nearly remain unchanged in the ozone-treated plants compared with untreated plants, excepting alanine, proline, tryptophan, sucrose, and raffinose. To identify the effect of ozone on the leaf, we analyzed the epidermal cells on the leaf surface by scanning electron microscopy. Interestingly, amount of epidermal cells were partially destructed in ozone-treated plants. Conclusion : By analyzing both primary and secondary metabolites of tartary buchwheat without or with ozone, we identified that ozone affects the modulation of the metabolites as well as gene expression in tartary buchwheat.
        7.
        2017.06 KCI 등재 서비스 종료(열람 제한)
        Background: Rehmannia glutinosa is a perennial herb belonging to the family Scrophulariaceae. Its roots have been utilized as a traditional medicine. The aim of this study was to elucidate the basic information of the roots of the R. glutinosa cultivars and their utilization. Methods and Results: The roots of R. glutinosa cultivars were harvested in the end of March. The two iridoid glycosides, aucubin and catalpol, were analyzed by liquid chromatography/mass spectrometry (LC/MS), whereas γ-aminobutyric acid (GABA) was analyzed by gas chromatography/mass spectrometry (GC/MS). The aucubin content was the highest in the Dakang cultivar, whereas no aucubin was detected in the five cultivars. All cultivars had more than 12 ㎎/g catalpol content, and the maximum catalpol content was found in Jihwang 1. The GABA content was the highest in Suwon 1, and it was 40 times more than that in the Yeongang cultivar. Conclusions: The highest aucubin, catapol and GABA contents were detected in the Dakang, Jihwang 1, and Suwon 1, cultivars respectively. This study provides the crucial information regarding the versatile utilization and pedigree selection of R. glutinosa cultivars.
        8.
        2017.05 서비스 종료(열람 제한)
        Background : Rehmannia glutinosa is a perennial herb belonging to the family Scrophulariaceae. Its roots have been utilized as a traditional medicine but the aerial parts (flower, flower stalk, leaf) were not used. In this paper, we aimed to determine the content of three compounds [aucubin, catalpol, and γ-aminobutyric acid (GABA)] in different organs of R. glutinosa. Methods and Results : The flower, flower stalk, leaf, and root of R. glutinosa were harvested in the end of August. The aucubin and catalpol were analyzed by LC/MS, whereas GABA was analyzed by GC/MS. The aucubin content was the highest in the leaf, while catalpol and GABA were the highest in the flower. The aucubin content of in the leaf was 1.43, 0.81, and 1.07 ㎎/g, respectively. The catalpol content of flower in Dakang, Tokang, and Suwon 9 was 41.06, 28.78 and 37.48 ㎎/g, respectively. The GABA content of flower in Dakang, Tokang, and Suwon 9 were 0.79, 0.76 and 0.65 ㎎/g, respectively. Conclusions : The contents of aucubin, catalpol, and GABA were higher in leaf and flower than that of root. This study provides the important information of R. glutinosa leaf and flower as a potential supplement.
        9.
        2017.05 서비스 종료(열람 제한)
        Background : The Production of high quality ginseng seedling become increasingly important in the cultivation of ginseng because the quality of ginseng seedling is closely related to yield of ginseng. However, it has become difficult to produce high quality ginseng seedling due to environmental instability such as an increase in the occurrence of abnormal climate and pests, and the difficulty in obtain new place to cultivate ginseng seedling. This study was carried out to analyze the growth characteristics of ginseng seedling according to application of fermented compost during ginseng seedling cultivation Methods and Results : In order to evaluate the effect of fermented compost on the growth of ginseng seedling, fermented compost containing antagonistic microorganism was prepared and applied 300kg per 10a to planned place for ginseng cultivation. After seeding of the ginseng seeds, the growth of ginseng was analysed. The pH, EC, organic matter, P2O5 and NO3-N of the compost treated group were 6.1, 2.75 ds/m, 18.97 g/㎏, 1,202 ㎎/㎏ and 287.4 ㎎/㎏, respectively, while those of non-treated group were 6.6, 0.25 ds/m, 14.67 g/㎏, 1,055 ㎎/㎏ and 8.77 ㎎/㎏, respectively. As a result of analyzing the growth characteristics of ginseng seedling, the growth of aboveground part was not significantly different between the treated and non-treated group. The root length and root diameter were 13.0 ± 1.50 ㎝ and 5.5 ± 0.27 ㎜, respectively, which were not significantly different from non-treated group. However, root weight was 1.20 ± 0.14 g, which is 1.4 times higher than that of control. Conclusion : It was confirmed that the quality of ginseng seedling was improved by compost application. These results suggested that fermented compost could be used as a material for nutrients management in ginseng seedling cultivation.
        10.
        2017.05 서비스 종료(열람 제한)
        Background : The study about cultured wild ginseng root (Panax ginseng C. A. Meyer) have been reported mainly ginsenosides in saponins family. However metabolites of fermented wild ginseng roots by microorganisms was not reported yet. Methods and Results : Cultured wild ginseng roots were used for fermentation of ginseng roots using Pediococcus pentosaceus and other bacterial strains. We analyzed different types of ginsenoside contents, metabolite and enzyme contents, and gene expression by using microorganisms. Results showed considerable differences in ginseonoside contents specially Rk1 and Rg5. The highest enzyme activity level was by Glutathione reductase (GR) and Glutathione S transferase (GST) in fermented ginseng roots than control (non-fermented), whereas Glutathione peroxidase (GPX) and Peroxidase (POD) contents were reduced. Score plots and loading plots of principal components 1 of the PCA result obtained from the data on 43 metabolites in fermented wild ginseng root of five conditions. The concentration of metabolite such as β-alanin and 4-aminobutyric acid (GABA), which is used to improve memory were increased in fermented ginseng roots than control. We found functional gene in wild ginseng root related with metabolic process. The APX gene expression gradually increased in fermented ginseng root with respect to fermentation times. Conclusion : In this study, accumulation of functional metabolite in cultured ginseng r
        11.
        2017.02 KCI 등재 서비스 종료(열람 제한)
        Background: Rehmannia glutinosa is a perennial herb belonging to the family Scrophulariaceae. Its root has been utilized as a traditional medicine but the aerial parts (flower, flower stalk, leaf) are not used. We aimed to determine the content of three compounds [aucubin, catalpol, and γ-aminobutyric acid (GABA)] in the different organs of R. glutinosa cultivars (Dakang, Tokang, and Suwon 9) Methods and Results: The flower, flower stalk, leaf, and root of R. glutinosa were harvested at the end of August. The aucubin and catalpol contents were analyzed by LC/MS, whereas the GABA content was analyzed by GC/MS. The aucubin content was the highest in the leaf, while catalpol and GABA were the highest in the flower. The aucubin contents of leaf in Dakang, Tokang, and Suwon 9 were 1.43, 0.81, and 1.07㎎/g, respectively. The catalpol contents of flower in Dakang, Tokang, and Suwon 9 were 41.06, 28.78, and 37.48㎎/g, respectively, the GABA contents were 0.79, 0.76, and 0.65㎎/g, respectively. Conclusions: The aucubin, catalpol, and GABA contents were higher in the leaf and flower than that in the root. This study show that R. glutinosa leaf and flower can be used as a potential supplement.
        12.
        2016.10 서비스 종료(열람 제한)
        Background : The genus of Mentha contains more than 25 species and has been used as cuisines, medicines, cosmetics, oral hygiene products, pharmaceuticals, pesticides, and flavor enhancing agent. Due to economical value of these species, many studies have identified and isolated the beneficial constituents such as flavonoids, terpenoids, and volatile compounds. In this study, the primary and secondary metabolites were investigated from the aerial parts of nine different Mentha species including peppermint (M. piperita), pennyroyal mint (M. pulegium), spearmint (M. spicata), horse mint (M. longifolia), water mint (M. aquatica), apple mint, pineapple mint (M. suaveolens), and chocolate mint, eau de cologne mint (M x piperita hybrids). Also, we reported the antioxidant properties using extracts of obtained plants. Methods and Results : In total, 67 metabolites were detected using gas chromatography time-of-flight mass spectrometry (GC-TOFMS). The difference among nine Mentha spp. by principal components analysis has been investigated. Various phenoilic compounds and carotenoids were characterized quantified in Mentha plants by HPLC. Of these, rosmarinic acid was found to be rich in most of this family. In addition, the highest content of riboflavin were indicated in spearmint. Moreover, the highest antioxidant activities (88.6 % 100 μl/ml in DPPH assay, 76.2% 100 μl/ml in hydrogen peroxide radical scavenging activity, and 0.076 absorbance in reducing power assay) have been shown in horse mint. Conclusion : We determined the differences in accumulation of primary and secondary metabolites (phenolic compound, carotenoid, and riboflavin) among nine Mentha species. Totally, 67 primary metabolites were identified and compared the difference by principal components analysis. Besides, horse mint has the highest and strongest antioxidant activities compared to others.
        13.
        2016.10 서비스 종료(열람 제한)
        Background : Tagetes species which belong to Asteraceae show different characteristics including, bloom size, shape, color, plant size, and leaf shape. The color of Tagetes flowers ranging from white to dark orange is due to accumulation of different carotenoids, pathway intermediates, and amount of the same carotenoid. Methods and Results : The carotenoids were monitored in flower extracts from six cultivars of Tagetes that include three T. erecta cultivars, Discovery Orange (DO), Inca Orange (IO), and Inca Yellow (IY), and three T. patula cultivars, including Durango Bee (DB), Durango Yellow (DY), and Safari Red (SR) using HPLC analysis. It showed considerable differences in carotenoid composition depending on cultivars and types of carotenoids. The highest concentration of violaxanthin which represents orange color in plants was showed in IO, whereas the compound was not detected in DB, and DY. Yellow-colored cultivars such as IY, DB, and DY exhibited low levels of lutein. However, others that indicate orange color, DO, IO, and SR showed high levels of lutein. Also, similar pattern was found in the zeaxanthin measurements. α-carotene was significantly accumulated in SR compared to other cultivars. The highest amount of β-carotene was found in SR, followed by IO, IY, DO, DY and DB. Similarly, the highest and lowest amount of 9-cis-β-carotene was showed in SR and DB, respectively. Interestingly, all cultivars except SR in 13-cis-β-carotene showed the same pattern with β-carotene, but no detection indicated in SR. Conclusion : In this study, we determined the differences in carotenoid yields among six Tagetes cultivars. In total, seven carotenoids that include violaxanthin, lutein, zeaxanthin, α -carotene, β-carotene, 9-cis-β-carotene, and 13-cis-β-carotene were detected. Among them, all of the cultivars accumulated primarily lutein. In addition, contents of each carotenoid varied in these flowers depending on cultivars.
        14.
        2016.10 서비스 종료(열람 제한)
        Background : Plants live in restricted spaces that are constantly exposed to various environmental stresses. Under these stressful conditions, plants lead to biosynthesize specialized metabolites to adapt to environmental stresses. Here we investigate the effects of cold on the metabolome of tartaty buckwheat, focusing the flavonoid biosynthetic pathway. Methods and Results : From the metabolic profiling based on the GC-TOF-MS analysis, we identified the effect of cold on forty-four metabolites, including sugars, amino acids, and organic acids. Most of sugars and sugar derivatives remain nearly unchanged or slightly decreased in the plants grown at 25 ºC, whereas sugar and sugar derivative contents of cold-treated plants significantly increased, excepting galactose. Some of amino acid and amino acid derivatives contents decrease in cold-treated plants, whereas organic acid derived from tricarboxylic acid (TCA) cycle were increased the cold-treated plants compared with the plants grown at 25 ºC. Particularly, the contents of two anthocyanins, cyanidin 3-O-glucoside and cyanidin 3-O-rutinoside, were significantly increased by cold treatment. Proanthocyanidins such as epicatechin and catechin were also significantly affected by cold. The expression of most flavonoid biosynthetic genes were significantly upregulated in cold-treated buckwheat seedling. Among the flavonoid biosynthetic genes, the expression of FtANS was notably upregulated in response to cold. Conclusion : By analyzing both primary metabolites and secondary metabolites of tartary buchwheat without or with cold, we showed that cold play a critical role in the modulation of the primary metabolites and flavonoid synthesis pathway in tartary buchwheat. Particularly, anthocyanin and proanthocyanidin biosynthetic pathways are strongly up-regulated in response to cold.
        15.
        2016.10 서비스 종료(열람 제한)
        Background : Despite the presence of various bioactive compounds in ginseng, there is lack of study on the variations of bioactive compounds in ginseng according to the cultivation of soil and the applied fertilizer types (or amount). Therefore, this study aims to examine the variations of 37 fatty acids (FA) and 8 vitamin E (Vit-E) vitamers in 6-year-old ginseng root cultivated in different soil types with different fertilizers regimes. Methods and Results : The profiling of 37 FAs and 8 Vit-E vitamers in 6-year-old ginseng roots was measured by gas chromatography coupled with a flame ionization detector, and then these results were statistically analyzed with chemometrics. The FA and Vit-E content in ginseng roots varied significantly with respect to soil cultivation conditions due to organic fertilizer types and amounts used. Unsaturated FA in ginseng is approximately 2.7 fold higher than the saturated FA. Linoleic, palmitic, and oleic acids were the most abundant FAs found in the ginseng roots. Also, the major Vit-E vitamer found in ginseng root is α -tocopherol. In particular, the application of rice straw compost or food waste fertilizer was increased to create nutritionally-desirable FAs and bioactive Vit-E in ginseng root. In addition, phytonutrient profiling coupled with chemometrics can be used to discriminate the cultivation conditions of ginseng. Conclusion : This preliminary study extends our understanding about the variations of FA and Vit-E in ginseng root depending on cultivation conditions. Hence, these results can be useful as basic information for reliable ginseng production containing high amounts of phytonutrients in a paddy-converted field.
        16.
        2016.10 서비스 종료(열람 제한)
        Background : Tagetes species which belong to Asteraceae show different characteristics including, bloom size, shape, color, plant size, and leaf shape. The color of Tagetes flowers ranging from white to dark orange is due to accumulation of different carotenoids, pathway intermediates, and amount of the same carotenoid. Methods and Results : The carotenoids were monitored in flower extracts from six cultivars of Tagetes that include three T. erecta cultivars, Discovery Orange (DO), Inca Orange (IO), and Inca Yellow (IY), and three T. patula cultivars, including Durango Bee (DB), Durango Yellow (DY), and Safari Red (SR) using HPLC analysis. It showed considerable differences in carotenoid composition depending on cultivars and types of carotenoids. The highest concentration of violaxanthin which represents orange color in plants was showed in IO, whereas the compound was not detected in DB, and DY. Yellow-colored cultivars such as IY, DB, and DY exhibited low levels of lutein. However, others that indicate orange color, DO, IO, and SR showed high levels of lutein. Also, similar pattern was found in the zeaxanthin measurements. α-carotene was significantly accumulated in SR compared to other cultivars. The highest amount of β-carotene was found in SR, followed by IO, IY, DO, DY and DB. Similarly, the highest and lowest amount of 9-cis-β-carotene was showed in SR and DB, respectively. Interestingly, all cultivars except SR in 13-cis-β-carotene showed the same pattern with β-carotene, but no detection indicated in SR. Conclusion : In this study, we determined the differences in carotenoid yields among six Tagetes cultivars. In total, seven carotenoids that include violaxanthin, lutein, zeaxanthin, α -carotene, β-carotene, 9-cis-β-carotene, and 13-cis-β-carotene were detected. Among them, all of the cultivars accumulated primarily lutein. In addition, contents of each carotenoid varied in these flowers depending on cultivars.
        17.
        2016.10 서비스 종료(열람 제한)
        Background : The natural stable isotope ratio of common bio-elements like carbon (C), nitrogen (N), oxygen (O), or sulfur (S) varies with diverse isotope fractionation processes in nature. Therefore, measuring the variation of these stable isotope ratios in ginseng roots can be a feasible tool to discriminate the geographical origins of ginseng in Korea. Methods and Results : The 3-year-old six Korean ginseng cultivars were cultivated at the five regions in Korea, and then used for measuring the stable isotope ratios of C, N, O, and S by isotope ratio mass spectrometry (IRMS). The mean C, N, O, and S stable isotope ratio values in the ginseng roots significantly differed according to the cultivation regions (p < 0.05). However, these isotope ratios in ginseng roots had relatively weak discriminative power against to the ginseng cultivars at each cultivation region. The interaction of the cultivation region and ginseng cultivar type also significantly affected to the C, N, O, and S stable isotope ratio in ginseng roots (p < 0.0001). The two-dimensional plots associated with the N stable isotope ratio can effectively separate the ginseng roots in Jinan compared to those in the other regions. The partial least squares-discriminant analysis showed more significant separation between ginseng geographical origins compared to the principal component analysis. Conclusion : Our findings improve our understanding of how the isotope composition of ginseng roots varies with respect to cultivation regions and cultivars, and suggest that the analysis of the stable isotope ratios combined with chemometrics can be used as a feasible tool to discriminate geographical origin of ginseng in Korea.
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