Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Martha L. Gay"'
Autor:
Martha L Gay, Steven M Musser
Publikováno v:
Journal of AOAC INTERNATIONAL. 91:501-505
Nordihydroguaiaretic acid (NDGA) occurs naturally in chaparral (Larrea tridentate Coville), a plant which commonly grows in the Southwest United States and has been used for medicinal purposes by Native Americans indigenous to that region. In additio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16f1b587eb9c0ed08f4195aca1080db7
https://doi.org/10.1093/jaoac/91.3.501
https://doi.org/10.1093/jaoac/91.3.501
Publikováno v:
Journal of Agricultural and Food Chemistry. 54:285-291
We report a simplified analytical procedure for determination of ephedrine alkaloids and synephrine in dietary supplements. Cleanup by simple filtration, when combined with tandem mass spectrometry (MS/MS) detection, provided results comparable to ou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e649f8d2f56d011a11a186a8f060d6c
https://doi.org/10.1021/jf051735w
https://doi.org/10.1021/jf051735w
Publikováno v:
Journal of Agricultural and Food Chemistry. 51:7547-7554
The described liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the detection of acrylamide in food entails aqueous room temperature extraction, SPE cleanup, and analysis by LC-MS/MS. The method is applicable to a wide variety of f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e42f816f1c4c06f537853bdb64ad309
https://doi.org/10.1021/jf0346354
https://doi.org/10.1021/jf0346354
Publikováno v:
Journal of AOAC INTERNATIONAL. 84:761-769
Arapid, isocratic method for the separation of 6 ephedrine-type alkaloids which may occur in dietary supplements was modified to permit quantitation and confirmation by liquid chromatography/mass spectrometry using atmospheric pressure chemical ioniz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c87406993cead0853c408aec6d296c3
https://doi.org/10.1093/jaoac/84.3.761
https://doi.org/10.1093/jaoac/84.3.761
Publikováno v:
Journal of AOAC INTERNATIONAL. 80:303-315
Má Huáng is a traditional Chinese medicine derived from the aerial parts of several Ephedra species (Ephedraceae). These plants produce (–)-ephed- rine, (+)-pseudoephedrine, (–)-norephedrine, (+)- norpseudoephedrine, (–)-N-methylephedrine, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7093a6e55617a3dfea3cd8c3d0970859
https://doi.org/10.1093/jaoac/80.2.303
https://doi.org/10.1093/jaoac/80.2.303
Publikováno v:
Food Additives and Contaminants. 12:671-676
A method was developed to determine the amount of residual oligomers in nylon food packaging. In addition, a method was developed to measure oligomers that migrate to a food-stimulating liquid (oil) during oven cooking conditions. It was found that t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d293ff151b2b89cfe04ff16e05c2a417
https://doi.org/10.1080/02652039509374355
https://doi.org/10.1080/02652039509374355
Autor:
Lane C. Sander, Katherine E. Sharpless, Mary B. Satterfield, Toshihide Ihara, Karen W. Phinney, James H. Yen, Stephen A. Wise, Martha L. Gay, Joseph W. Lam, Margaret McCooeye, Graeme Gardner, Catharine Fraser, Ralph Sturgeon, Mark Roman
Publikováno v:
Analytical chemistry. 77(10)
A suite of five ephedra-containing dietary supplement Standard Reference Materials (SRMs) has been issued by the National Institute of Standards and Technology (NIST) with certified values for ephedrine alkaloids, synephrine, caffeine, and selected t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7d0f727ecd4e9c4667374e5bb8f407a
https://pubmed.ncbi.nlm.nih.gov/15889898
https://pubmed.ncbi.nlm.nih.gov/15889898
Publikováno v:
Journal of agricultural and food chemistry. 52(7)
A variety of popular instant, ground, and brewed coffees were analyzed using a modified liquid chromatography-tandem mass spectrometry (LC-MS/MS) method specifically developed for the determination of acrylamide in foods. Coffee test portions were sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ac9d1805b3b1b88ddccd087ba54f2fa
https://pubmed.ncbi.nlm.nih.gov/15053542
https://pubmed.ncbi.nlm.nih.gov/15053542
Autor:
Richard A. Niemann, Martha L. Gay
Publikováno v:
Journal of agricultural and food chemistry. 51(19)
An HPLC method with on-line cleanup coupled to the separation column is described for determination of (-)-norephedrine, (+)-norpseudoephedrine, (-)-ephedrine, (+)-pseudoephedrine, (-)-N-methylephedrine, (+)-N-methylpseudoephedrine, and (+/-)-synephr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5627dd62de26b2cd111794786ec5570c
https://pubmed.ncbi.nlm.nih.gov/12952412
https://pubmed.ncbi.nlm.nih.gov/12952412
Publikováno v:
Journal of natural products. 59(10)
A new series of fumonisins, designated FP1-3, were isolated from a culture of Fusarium moniliforme (M-2285) grown on solid corn. The new compounds contain a 3-hydroxypyridinium moiety at the C-2 position of the eicosane backbone instead of the amine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bceae06b60a6245153f01ad9d01ebb4
https://pubmed.ncbi.nlm.nih.gov/8904846
https://pubmed.ncbi.nlm.nih.gov/8904846