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37 Newest Publications about the topic reference substances

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Molecules, Vol. 20, Pages 18352-18366: Characterization and Quantification by LC-MS/MS of the Chemical Components of the Heating Products of the Flavonoids Extract in Pollen Typhae for Transformation Rule Exploration

08-Oct-2015 | Chen, Yeqing ; Yu, Hongli ; Wu, Hao ; Pan, Yaozong ; Wang, Kuilong ; Jin, Yangping ; Zhang, Chengchao, Molecules, 2015

The Traditional Chinese Medicine herbs Pollen Typhae and Pollen Typhae Carbonisatus have been used as a hemostatic medicine promoting blood clotting for thousands of years. In this study, a reliable, highly sensitive method based on LC-MS/MS has been developed for differentiation of the heating ...

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HPLC/Q‐TOF‐MS‐Based Identification of Absorbed Constituents and Their Metabolites in Rat Serum and Urine after Oral Administration of Cistanche deserticola Extract

04-Aug-2015 | Wen‐Lan Li, Xiang‐Ming Sun, Hui Song, Jing‐Xin Ding, Jing Bai, Qiang Chen, Journal of Food Science, 2015

Abstract As a famous health food in China, Cistanche deserticola (C. deserticola) suggested an estrogenic activity according to our previous study. However, no one clarifies its active material basis to date. To find more potentially active constituents and elucidate metabolic pathways of ...

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Combination of quantitative analysis and chemometric analysis for the quality evaluation of three different frankincenses by ultra high performance liquid chromatography and quadrupole time of flight mass spectrometry

30-Jul-2015 | Chao Zhang, Lei Sun, Run‐tao Tian, Hong‐yu Jin, Shuang‐cheng Ma, Bing‐ren Gu, Journal of Separation Science, 2015

Frankincense has gained increasing attention in the pharmaceutical industry because of its pharmacologically active components such as boswellic acids. However, the identity and overall quality evaluation of three different frankincense species in different Pharmacopeias and the literature have ...

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Prediction of gas chromatography with flame ionization detection response factors: Algorithm improvement, extension to silylated compounds, and application to the quantification of metabolites

16-Jul-2015 | Jean‐Yves Saint Laumer, Sabine Leocata, Emeline Tissot, Lucie Baroux, David M. Kampf, Philippe Merle, Alain Boschung ..., Journal of Separation Science, 2015

We previously showed that the relative response factors of volatile compounds were predictable from either combustion enthalpies or their molecular formulae only [1]. We now extend this prediction to silylated derivatives by adding an increment in the ab initio calculation of combustion ...

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Rapid Screening of Different Types of Antitumor Compound Groups from Traditional Chinese Medicine by Hollow Fiber Cell Fishing with High Performance Liquid Chromatography

28-Feb-2015 | Zhang, Li-Sha; Chen, Xuan; Hu, Shuang; Sheng, Xia; Bai, Xiao-Hong, Combinatorial Chemistry, 2015

Abstract: A novel hollow fiber cell fishing with high performance liquid chromatography (HFCF-HPLC) was extended and used to screen flavonoid and anthraquinone active compound groups simultaneously from traditional Chinese medicines (TCMs). In this study, three cells (MCF-7, SGC7901, and ...

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Chemical analysis and risk assessment of prohibited colouring agents in face paint with special regard to CI 15585 (D&C Red No. 9, Pigment Red 53:1)

13-Nov-2014 | Andrea Keck‐Wilhelm, Evamaria Kratz, Gerd Mildau, Maren Ilse, Claudia Schlee, Dirk W. Lachenmeier, International Journal of Cosmetic Science, 2014

Abstract Objective Face painting in the colours of the national flags has become a mass phenomenon during international mega sporting events. Face paints, belonging to the group of lipophilic decorative cosmetics, pose an analytical challenge, especially in the sample preparation steps to ...

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Approach to the study of flavone di‐C‐glycosides by high performance liquid chromatography‐tandem ion trap mass spectrometry and its application to characterization of flavonoid composition in Viola yedoensis

30-Sep-2014 | Jie Cao, Chengle Yin, Yan Qin, Zhihong Cheng, Daofeng Chen, Journal of Mass Spectrometry, 2014

The mass spectrometric (MS) analysis of flavone di‐C‐glycosides has been a difficult task due to pure standards being unavailable commercially and to that the reported relative intensities of some diagnostic ions varied with MS instruments. In this study, five flavone di‐C‐glycoside standards ...

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Quinoline Carboxamide‐Type ABCG2 Modulators: Indole and Quinoline Moieties as Anilide Replacements

28-Aug-2013 | Stefanie Bauer, Cristian Ochoa‐Puentes, Qiu Sun, Manuel Bause, Günther Bernhardt, Burkhard König, Armin Buschauer, ChemMedChem, 2013

ABC, it′s easy as 1 2 3! Bioisosteric replacement of the anilide core by an indole moiety considerably increased stability and gave potent and selective ABCG2 (BCRP) inhibitors. Some compounds are superior to the reference substances fumitremorgin C and Ko143 in terms of potency and efficacy ...

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Iridium-catalysed isomerising trialkylsilylation of methyl oleate

19-Aug-2013 | Author(s): Thimo Huber , Doris Firlbeck , Herbert M. Riepl, Journal of Organometallic Chemistry, 2013

Publication date: 1 November 2013 Source:Journal of Organometallic Chemistry, Volume 744 Author(s): Thimo Huber , Doris Firlbeck , Herbert M. Riepl Monounsaturated fatty acids from vegetable oils are attractive substrates for applications as renewable feedstock in polymer industry. ...

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Quantification of docetaxel and its metabolites in human plasma by liquid chromatography/tandem mass spectrometry

19-Jul-2013 | J. J. M. A. Hendrikx, A. C. Dubbelman, H. Rosing, A. H. Schinkel, J. H. M. Schellens, J. H. Beijnen, Rapid Communications in Mass Spectrometry, 2013

RATIONALE During drug development accurate quantification of metabolites in biological samples using mass spectrometry is often hampered by the lack of metabolites of chemically pure quality. However, quantification of metabolites can be useful for assessment and interpretation of ...

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