Výsledky vyhledávání - "Giovanna Vlahov"

13C Nuclear Magnetic Resonance Spectroscopic Detection of the Adulteration of Extra Virgin Olive Oils Extracted from Different Cultivars with Cold-Pressed Hazelnut Oil

Autor: Giovanna Vlahov

Publikováno v: Journal of AOAC INTERNATIONAL. 92:1747-1754

13C NMR spectroscopy was applied to detect the adulteration of olive oils with hazelnut oil. Considering that the linolenate chain and the squalene hydrocarbon were absent in hazelnut oil, unlike olive oil, a 13C NMR spectroscopy method was developed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a7ab3dcac753c1a2e032217d8f4d909
https://doi.org/10.1093/jaoac/92.6.1747

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13C Nuclear Magnetic Resonance Spectroscopy to Determine Fatty Acid Distribution in Triacylglycerols of Vegetable Oils with 'High - Low Oleic Acid' and 'High Linolenic Acid'

Autor: Giovanna Vlahov

Publikováno v: The Open Magnetic Resonance Journal. 2:8-19

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4df47bc74f0d204cfe97040e872e2ae2
https://doi.org/10.2174/1874769800902010008

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13C NMR Spectroscopy to Determine Structure and Composition of Waxes and Glycerides

Autor: Giovanna Vlahov

Publikováno v: Current Pharmaceutical Analysis. 4:126-136

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f07ed944237d1f25773b3a9edcae0ab2
https://doi.org/10.2174/157341208785161254

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13C nuclear magnetic resonance spectroscopy to check 1,3-random, 2-random pattern of fatty acid distribution in olive oil triacylglycerols

Autor: Giovanna Vlahov

Publikováno v: Spectroscopy. 19:109-117

The fatty acid distribution between the 1,3- and 2-positions of triglycerides was determined in the olive oil set sampled in the Marche region, by using the13C NMR method which applies the DEPT pulse sequence. The results confirmed that the oleic and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c443e2e6f401681931520dda62f53f6
https://doi.org/10.1155/2005/765236

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Use of 13 C nuclear magnetic resonance distortionless enhancement by polarization transfer pulse sequence and multivariate analysis to discriminate olive oil cultivars

Autor: Giovanna Vlahov, Adrian D. Shaw, Douglas B. Kell

Publikováno v: Journal of the American Oil Chemists' Society. 76:1223-1231

Distortionless enhancement by polarization transfer (DEPT) pulse sequence was used to set up a quantitative high-resolution 13 C nuclear magnetic resonance (NMR) method to discriminate olive oils by cultivars and geographical origin. DEPT pulse seque

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e53b721e4673ea051faf7405b232e2b
https://doi.org/10.1007/s11746-999-0098-z

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Triacylglycerols of the olive fruit (Olea europaea L.): characterization of mesocarp and seed triacylglycerols in different cultivars by liquid chromatography and13C NMR spectroscopy

Autor: Nicola Simone, Giovanna Vlahov, Carlo Schiavone

Publikováno v: Lipid - Fett. 101:146-150

Triacylglycerols of mesocarp and seed oils extracted from olive fruits of different cultivars were characterized. The analysis of the profiles of the triglyceride isomers which were determined by HPLC, evidenced that ECN 48 (OOO-OOP) and ECN 46 (OLO)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::45781714134c7bb974db472620b647c9
https://doi.org/10.1002/(sici)1521-4133(199904)101:4<146::aid-lipi146>3.0.co

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Regiospecific analysis of natural mixtures of triglycerides using quantitative13C nuclear magnetic resonance of acyl chain carbonyl carbons

Autor: Giovanna Vlahov

Publikováno v: Magnetic Resonance in Chemistry. 36:359-362

High-resolution 13C NMR spectroscopy of the carbonyl carbons of triglyceride acyl chains was used as a quantitative method for the regiospecific analysis of the triglyceride fraction of vegetable oils of different botanical origins. The carbonyl carb

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3e25cda36916ae615e25bb25ccc10b5c
https://doi.org/10.1002/(sici)1097-458x(199805)36:5<359::aid-omr274>3.0.co

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Discrimination of the variety and region of origin of extra virgin olive oils using 13C NMR and multivariate calibration with variable reduction

Autor: Jem J. Rowland, Giovanna Vlahov, Angela di Camillo, Alun Jones, Douglas B. Kell, Adrian D. Shaw, Giorgio Bianchi

Publikováno v: Analytica Chimica Acta. 348:357-374

Copyright (c) 1997 Elsevier Science B.V. All rights reserved. There is strong evidence that consumption of olive oil, especially extra virgin olive oil, reduces the risk of circulatory system diseases. Such oil is generally more expensive than other

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dcce18c2f095f8e4558b48815a935f80
https://doi.org/10.1016/s0003-2670(97)00037-8

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NMR structural analysis of a tri-O-isopropylidene derivative of d-glycero-d-ido-2-octulose, the major sugar found in the resurrection plant Craterostigma plantagineum

Autor: Dorothea Bartels, Nicoletta Pozzi, Giovanna Vlahov, Oliver W. Howarth

Publikováno v: Carbohydrate Research. 289:137-142

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::641e446d6c7419451fffb9c119e4312f
https://doi.org/10.1016/0008-6215(96)00106-1

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13C Nuclear magnetic resonance study of cyclopropenoid triacylglycerols

Autor: Giovanna Vlahov, Oliver W. Howarth

Publikováno v: Chemistry and Physics of Lipids. 81:81-85

Full 13C NMR shift assignments have been made for both the sterculate and malvalate moieties in the seed oil from Sterculia foetida, and the chain distribution has been determined from quantitative NMR measurements. The proportion of malvalate is not

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d7c674193bdb85cc4c6d49a45ac25e53
https://doi.org/10.1016/0009-3084(96)02536-4

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