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JPC – Journal of Planar Chromatography – Modern TLC - A simple, rapid, and cost-effective thin-layer chromatography (TLC) image analysis was developed and validated to quantify rhein... 相似文献
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N. Manojlovi? Z. Markovi? W. Gritsanapan K. Boonpragob 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2009,83(9):1554-1557
A high-performance liquid chromatographic (HPLC) method has been developed for the characterization of anthraquinone metabolites
in extracts of the lichen Laurera benguelensis. With this method four anthraquinone derivatives 1,8-dihydroxy-3-methoxy-6-methylanthraquinone, 1,8-dihydroxy-3-formyl-6-methoxyanthraquinone,
1,8-dihydroxy-3-hydroxymethyl-6-methoxy-anthraquinone and 1,3,8-trihyroxy-6-methylanthraquinone can be analyzed. Components
of lichen were detected by characteristic ultraviolet spectra and relative retention times. This is first report of phytochemical
analysis of L. benguelensis. Importance of this research is in recognizing some new source (lichen and its extracts) as a natural emplacement of antioxidants
because oxidation with free radicals or autooxidation is big problem for preservation of food products.
The article is published in the original. 相似文献
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I. Manojlović G. Bogdanović-Dusanović W. Gritsanapan N. Manojlović 《Chemical Papers》2006,60(6):466-468
Five hydroxyanthraquinone derivatives physcion, emodin, fallacinal, teloschistin, and 1,3-dimethoxy-8-hydroxy-6-methyl-9,10-anthraquinone
were isolated from the lichen Caloplaca cerina growing in Serbia. Three anthraquinone derivatives, namely physcion, emodin, and rhein were isolated and identified from
the Thai medicinal plant Cassia tora.
Presented at the 33rd International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, 22–26 May
2006. 相似文献
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Three fatty acid esters, (E)-4-(3,4-dimethoxyphenyl)but-3-en-1-yl linoleate (1), (E)-4-(3,4-dimethoxyphenyl)but-3-en-1-yl oleate (2), and (E)-4-(3,4-dimethoxyphenyl)but-3-en-1-yl palmitate (3), originated during storage by the interaction of components in Prasaplai, were synthesized. These three artificial esters were subjected to four biological evaluations. All three compounds were active against Mycobacterium tuberculosis H(37)Ra for which compounds 1 and 3 had inhibitory concentration at 200 microg mL(-1) while compound 2 inhibited at 100 microg mL(-1). When all these compounds were subjected to anti-HSV-1 test, compound 2 showed positive activity at 42.6 microg mL(-1) without any cytotoxic activity against human vero cell line while compound 3 had the cytotoxicity to vero cell at IC(50) 38 microg mL(-1). Compound 1 was inactive for this test. 相似文献
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The fruit rinds of mangosteen (Garcinia mangostana Linn.) have long been used as traditional medicines for treatment of skin infections, wounds, and diarrhea. A simple thin-layer chromatography (TLC)-densitometric method has been developed for the simultaneous quantification of alpha-mangostin in the extracts from unripe and ripe fruit rinds of G. mangostana. It was found in the ranges of 10.48 +/- 0.83 and 16.65 +/- 0.38% (w/w) in the dried unripe and ripe fruit rinds, respectively. The method was validated for linearity, precision, accuracy, limit of detection (LOD), and limit of quantitation (LOQ). The linearity was found over the range of 100-500 ng/spot with regression coefficient 0.999. Intraday and interday precision studies showed the relative standard deviation was <2%. Accuracy of the method was determined by a recovery study conducted at 3 different levels, and the average recovery was 99.49%. The LOD and LOQ were 40 and 100 ng, respectively. The proposed TLC-densitometric method was found to be simple, precise, specific, sensitive, and accurate. This method can be used for routine quality control of raw material of G. mangostana fruit rind, extract, and its products. It also can be applied in quantifying this marker compound in other drugs. 相似文献
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