{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,3]],"date-time":"2026-04-03T00:21:59Z","timestamp":1775175719056,"version":"3.50.1"},"reference-count":30,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2006,10,1]],"date-time":"2006-10-01T00:00:00Z","timestamp":1159660800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Food sci. technol. int."],"published-print":{"date-parts":[[2006,10]]},"abstract":"<jats:p> Extracts of leaves, fruits and seeds of olive tree cultivars of Tr\u00e1s-os-Montes e Alto Douro (Portugal) were analysed by reverse phase HPLC with diode array detection and mass spectrometry (MS). This methodology allowed the identification of some common phenolic compounds, namely, verbascoside, rutin, luteolin-7-glucoside, oleuropein and hydroxytyrosol. Moreover the hyphenation of HPLC with MS enabled the identification of n\u00fczhenide in olive seeds. An oleuropein glucoside was also detected in olive tree leaves. The total phenolic content was determined with the Folin Denis reagent and the total antioxidant activity with the ABTS method. There is a correlation between total antioxidant activity and total phenolic content with the exception of the seed extracts analysed. The apparent high antioxidant activity of seed extracts may be due to n\u00fczhenide, a secoiridoid that is the major phenolic component of olive seeds. These results suggest a possible application of olive seeds as sources of natural antioxidants. <\/jats:p>","DOI":"10.1177\/1082013206070166","type":"journal-article","created":{"date-parts":[[2006,10,4]],"date-time":"2006-10-04T11:24:54Z","timestamp":1159961094000},"page":"385-395","source":"Crossref","is-referenced-by-count":206,"title":["Phenolic Compounds and Antioxidant Activity of <i>Olea europaea<\/i> L.                 Fruits and Leaves"],"prefix":"10.1177","volume":"12","author":[{"given":"S.","family":"Silva","sequence":"first","affiliation":[{"name":"Instituto de Biologia Experimental e Tecnol\u00f3gica, Apartado                         12-2780-901 Oeiras, Portugal, Instituto de Tecnologia Qu\u00edmica e                         Biol\u00f3gica, Apartado 127-2780-901 Oeiras, Portugal,"}]},{"given":"L.","family":"Gomes","sequence":"additional","affiliation":[{"name":"Faculdade de Farm\u00e1cia de Lisboa, Av. das For\u00e7as                         Armadas 1649-019 Lisboa, Portugal"}]},{"given":"F.","family":"Leit\u00e3o","sequence":"additional","affiliation":[{"name":"Esta\u00e7\u00e3o Agron\u00f3mica Nacional (INIAP),                         Quinta do Marqu\u00eas, 2784-505 Oeiras, Portugal"}]},{"given":"A. V.","family":"Coelho","sequence":"additional","affiliation":[{"name":"Instituto de Tecnologia Qu\u00edmica e Biol\u00f3gica,                         Apartado 127-2780-901 Oeiras, Portugal, Universidade de \u00c9vora,                         Departamento de Qu\u00edmica 7000 \u00c9vora, Portugal"}]},{"given":"L. Vilas","family":"Boas","sequence":"additional","affiliation":[{"name":"Instituto de Tecnologia Qu\u00edmica e Biol\u00f3gica,                         Apartado 127-2780-901 Oeiras, Portugal, Instituto Superior                         T\u00e9cnico, Av. 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