geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Phenolic compounds in virgin olive oils: Fractionation by solid phase extraction and antioxidant activity assessment


, : Phenolic compounds in virgin olive oils: Fractionation by solid phase extraction and antioxidant activity assessment. Journal of the Science of Food & Agriculture 74(2): 169-174

The polar fraction of virgin olive oil was separated into two main parts (A and B) using solid phase extraction. Analysis of individual components by RP-HPLC indicated that the part (A) contained only simple phenols and phenolic acids. Part (B) had a complex nature. The two parts tested for their antioxidant activity showed relatively high protection factors in safflower oil stored at 80 degree C. Part B was found to contribute more than part A to the stability of the oil. The antioxidant activity of both fractions was related to their content of total polyphenols and o-diphenols. Acidic and alkaline hydrolysis showed significant quantitative changes in the HPLC profiles indicating the presence of ether and ester bonds while high-performance anion exchange chromatography of sugars after hydrolysis gave evidence for the presence of only traces of glycosides. A first attempt to identify a characteristic chromatographic peak of part B by HPLC fractionation and mass spectrometry showed the presence of an ester of tyrosol most probably with a dicarboxylic acid.

US$19.90

DOI: 10.1002/(sici)1097-0010(199706)74:2<169::aid-jsfa784>3.0.co;2-2


Other references

Wentrup, R.; Winkelmann, N.; Mitroshkin, A.; Prager, M.; Voderholzer, W.; Schachschal, G.; Jürgensen, C.; Büning, C., 2016: Photodynamic Therapy Plus Chemotherapy Compared with Photodynamic Therapy Alone in Hilar Nonresectable Cholangiocarcinoma. Standard treatments are not available for hilar nonresectable cholangiocarcinoma (NCC). It is unknown whether combination therapy of photodynamic therapy (PDT) plus systemic chemotherapy is superior to PDT alone. We retrospectively reviewed 68 pat...

Kikuchi, Y.; Koshiba, H.; Osawa, T.; Kawarasaki, T., 1972: Radiography of cat cry disease. Rinsho Hoshasen. Clinical Radiography 17(4): 292-297

Levesque, P., 2007: Are the teats in a good state?. The state of the teats of dairy cows is discussed. The effects of damage to teats are outlined. Notes are given on cracked teats, excessive congestion, inflammation at the base of the teat and viral diseases.

Ripley, H.R.; Levin, S.M., 1966: Abdominal angina associated with fibromuscular hyperplasia of the celiac and superior mesenteric arteries. The occur -rence of abdominal angina in association with fibromuscular hyper-plasia of the celiac axis and superior mesenteric artery is herein documented by pathologic, operative, and angiographic evidence. The lesions were found in women of a ge...

L.J.nXia; Zhang HongLiang; Yan YanLu; Min ShunGeng; L.Z.Chao, 2006: Establishment of math models of NIRS analysis for protein contents in seed and it's application in rice breeding. A study was conducted to analyse the genetic variability of protein content in rice hybrid progenies, the feasibility of building calibration model to estimate crude protein content in intact rice kernel by near-infrared reflectance spectroscopy (...

Gerna, G.; Battaglia, M.; Revello, M.G.; Gerna, M.T., 1983: Typing of herpes simplex virus isolates by enzyme-linked immunosorbent assay: comparison between indirect and double-antibody sandwich techniques. Indirect and double-antibody sandwich enzyme-linked immunosorbent assay techniques were compared for serotyping 42 herpes simplex virus isolates. Both procedures gave similar results, which were in complete agreement with those obtained by inhibit...

Tovkay, O.A., 2015: Cystic Tumors Of Suprarenal Glands And Peculiarities Of Its Surgical Treatment. The clinic experience for surgical treatment of patients, suffering cyst of suprarenal gland (SG), consisted of laparoscopic resection of SG together with a cyst and preserving a visually nonaffected parts of SG, due to what the risk reduction for...

Bonsignore, G., 2014: Technical problems in the current testing methods for the study of the physiology and the physiopathology of the bronchi roentgen bronchocinematography. Introductory note. Rivista Siciliana Della Tubercolosi E Delle Malattie Dell'apparato Respiratorio 15: 173-187

Brodie, M.J., 2014: Meta-analyses of antiepileptic drugs for refractory partial (focal) epilepsy: an observation. There are now a handful of published meta-analyses surrounding the efficacy and tolerability of, particularly, the newer antiepileptic drugs (AEDs) as adjunctive treatment for patients with refractory focal (partial) seizures [1-4]. All have inclu...

Anonymous, 1980: Post-infarction ventricular septal rupture. Lancet 2(8192): 463-464