• Bulletin of the Korean Chemical Society
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• 제25권12호
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• pp.1945-1947
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• 2004

• 대한치과기공학회지
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• 제35권3호
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• pp.209-218
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• 2013

Purpose: The purpose of this study was to know the availability of two photosensitizers, PD, DA, as a photosensitizer instead of CQ in UDMA dental composite resin. We want to know photopolymerization effect of UDMA unfilled resin and surface hardness of composite resin containing PD and DA were compared with those of CQ, most widely used photosensitizer for dental composite resins. Methods: The photopolymerization effect of UDMA studied by FT-IR spectroscopy increased with irradiation time and the amount of photosensitizer. Knoop hardness of experimental composite resins prepared by the addition of the photosensitizer content and irradiation time. Results: The relative photopolymerization effect of UDMA increased in the order of PD > CQ > DA. The composite resin of UDMA containing DA or PD, which shows better Knoop hardness than that containing CQ. Conclusion: PD and DA show as effective photosensizers, suitable for UDMA dental composite resin compare with a higher efficiency than CQ.

• Natural Product Sciences
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• 제15권4호
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• pp.246-249
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• 2009

Column chromatographic separation of the MeOH extract from the aerial parts of Thesium chinense TURCZ led to the isolation of two norsesquiterpenes (1 - 2), two phenylpropanes (3 - 4) and four flavonoids (5 - 8). Their structures were determined by spectroscopic means to be 5,6-epoxy-3-hydroxy-7-megastigmen-9-ene (1), (-)-loliolide (2), methyl-p-hydroxycinnamate (3), methyl caffeate (4), kaempferol (5), kaempferol-3-O-${\beta}$-Dglucopyranoside (6), kaepmferol-3,7-di-O-${\beta}$-D-glucopyranoside (7) and kaempferol-3-O-${\beta}$-D-glucopyranoside-6''-(3-hydroxy-3-methylglutarate) (8). Compounds 1 - 4, 7 and 8 were first isolated from this source. The isolated compounds were evaluated for their cytotoxicty in vitro using the sulforhodamin B bioassay (SRB).

• Archives of Pharmacal Research
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• 제17권6호
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• pp.434-437
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• 1994

1-Polyoxyphenyl-3-(2, 6-dioxyphenyl)propane-1, 3-diones have been synthesized as intermediates for flavone synthesis by condensation of 2-(2, 6-dioxybenzoyloxy)polyoxyacetophenone in the presence of phae transfer catalyst. The average yields of 1-polyoxyphenyl-3-phenylpropane-1, 3-diones, 1-polyoxyphenyl-3(2-benzyloxyphenyl)propane-1, 3-diones and 1-polyoxy-3-(2, 6-dibenzyloxyphenyl)propane-1, 3-dions were 79%, 74% and 71% respectively. The bulkiness of the benzyloxy groups or methyoxy gorups exerted steric hindrance and reduced the yield. Nevertheless, the yield were higher than the previously reported ones.

• 한국약용작물학회지
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• 제20권5호
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• pp.301-307
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• 2012

IPP isomerase (Iso) and Limonene synthase (Limo) are important enzymes in terpenoids biosynthesis pathway. The wild type and each metabolically engineered (Iso and Limo) transgenic spearmint (Mentha spicata Linne) plants were compared for their growth patterns and the contents of essential oil in in vitro culture media. The profile of terpenoid metabolites was obtained from the essential oil of the metabolically engineered transgenic spearmint, which was extracted using a modified SDE method, by GC-MS analysis. The growth of wild spearmint was more profuse in B5 culture medium than in other media. Significant differences in leaf and root growth patterns were observed between metabolically engineered transgenic and wild type spearmint plants. The leaves of the transgenic spearmint plants were slightly elongated but were dramatically narrower than those of wild type spearmints. The content of essential oil of transgenic spearmint was different slightly depending on the target terpenoid genes. The content of essential oils in Limo transgenic plants was higher than that of Iso, except for transgenic plant in B5 medium. The transgenic spearmint produced more terpenoids than the wild type. Iso spearmint extracts showed eleven terpenoids and a phenylpropane, while Limo spearmint extracts contained nine terpenoids. However, extracts from the wild type showed the presence of only four terpenoids.

• 한국식품영양과학회지
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• 제28권6호
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• pp.1201-1207
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• 1999

To utilize the leaves of broccoli, the shape of which was similar with that of kale leaves, as a vegetable juice, the extracts from two types of vegetable leaves were subjected to the analyses of proximate com ponents, volatile sulfur compounds, vitamin C and minerals. The sensory evaluation of the juices, prepared from kale and broccoli leaves, were performed by duo trio test and scoring test. Among eight varieties of broccoli, four varieties('Pilgrim', 'Greenbelt', 'Salinas' and 'Shasta')were not significantly different from kale(p<0.05), based on the duo trio sensory test. Sulfur and nitrogen compounds present in the dichloromethane extracts of kale and broccoli leaves 'Pilgrim' were identified as 3 butenyl, allyl, butyl and 4 methylsulfinylbutyl isothiocyanate(sulforaphane), 4,5 epithiovalero, 4,5 epithio 3 hydroxyvalero, benzenepropane, 3 hydroxy 4 propene, 4 methylthio butane, 3 hydroxy 3 phenylpropane, 5 methy lsulfinylpentane, 4 methoxyphenyl 3 hydroxypropane nitrile and dimethyl trisulfide by GC/MSD analysis. Proximate components were observed to be relatively similar between kale and broccoli leaves. Vitamin C and sugar content were higher in broccoli leaves(125∼180mg% and 8∼12°Brix) than in kale(101mg% and 7oBrix). In mineral analysis by AA and ICP Mass, 'Pilgrim' showed a higher content of K, Fe, Mn, Zn and Se. In separate experiment, sensory scores of bitter taste and astringent taste were lower and scores of over all taste and over all acceptability, higher in broccoli('1243') juice than those in kale juice.

• 대한치과기공학회지
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• 제33권4호
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• pp.291-297
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• 2011

Purpose: The purpose of this study was to know the availability of three photosensitizers, CQ, PD, DA, as a photosensitizer of dental resin composite. We want to know abortion band around visible light region for the using potential possibility as a photosensitizer for visible light cured dental composite resin. And I studied to know the relative photodecomposition ratio of three photosensitizers with or without photoinitiator, DAEM. Methods: The photodecomposition of three photosensitizers were studied by UV absorption spectroscopy in ethanol and determined by same instrument with irradiation time for relative photodecomposition. In order to study the effect of amine on photodecomposition was added the DAEM in the photosensitizer solution and the relative rate was measured by the same procedure with aove mentioned. Results: The all of three photosensitizers are absorbed around visible light region. The relative rate of decrease in absorbance incereased in the order: CQ < BD < PD. The effect of DAEM on the photodecomposition of the photosensitizers was appeared different results without DAEM. The photodecomposition rate of PD and DA decreased somewhat with the addition of amine, while that of CQ increased. The rtealtive photodecomposition rate increased in the oprder: BD ${\leq}$ CQ < PD with the addition of amine, but the differnce was not significant. Conclusion: PD and DA like CQ gives to the possibility of use as a photosensitizer for visible light cured dental composite resin by absorption around visible light region and photodecomposition in the maximum absorption wavelength. And it is showed that PD and DA are not effective decomposed with amine initiator, DAEM but CQ decomposed with DAEM effectively. This result may be due to a different mechanism operating for the decomposition of photosensitizers in the presence of amine.

• KSBB Journal
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• 제25권4호
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• pp.330-336
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• 2010

본 연구는 제주도에서 자생하는 비목나무 (Lindera erythrocarpa) 껍질에서 분리 동정한 신규화합물 (Jeju-Erythrane)의 항산화 활성 및 B16F10 mouse melanoma 세포에서의 tyrosinase와 멜라닌 생합성의 억제효과를 확인하여, 유용자원으로서 미백 및 기능성 화장료로의 산업적 활용 가능성이 있는지 알아보고자 시행하였다. 실험 결과, 신규화합물인 Jeju-Erythrane의 항산화 활성은 확인되지 않았고, B16F10 세포에서 tyrosinase와 멜라닌 합성을 농도 의존적으로 억제하는 것으로 밝혀졌으며, tyrosinase와 TRP-1 유전자의 단백질 및 mRNA 발현양도 농도 의존적으로 감소함을 보였다. 하지만, TRP-2 단백질과 mRNA는 농도에 관계없이 일정하게 발현하는 것을 알 수 있었다. 따라서, 본 연구 결과는 비목나무 (Lindera erythrocarpa) 껍질에서 분리 동정한 신규화합물 (Jeju-Erythrane)이 미백 관련 기능성 소재로서의 활용가치가 있음을 보여준다.