Cydonia oblonga Quince tree with edible fruits health benefit

Cydonia oblonga is a shrub or small tree of the rose family. Cydonia oblonga is a tree with edible fruits cultivated from ancient times in Asia and in the Mediterranean area. The Cydonia oblonga fruit is similar to that of the related apple and pear but is astringent, and hence it is used chiefly cooked in preserves. Marmalade is said to have first been made from Cydonia oblonga.

Natural wax constituents of a supercritical fluid CO(2) extract from quince Cydonia oblonga Mill pomace.
Anal Bioanal Chem. 2008 Apr 17. Lorenz P, Berger M, Bertrams J, Wende K, Wenzel K, Lindequist U, Meyer U, Stintzing FC. WALA Heilmittel GmbH, Dorfstrasse 3, 73087, Bad Boll/Eckwälden, Germany.
The chemical constituents of a lipophilic extract from quince Cydonia oblonga, obtained by supercritical fluid CO(2) extraction of the dried fruit pomace were investigated. Solvent partition of Cydonia oblonga wax with n-hexane or acetone yielded an insoluble (crystalline) and a soluble (oily) fraction. Both fractions were analyzed separately. The insoluble fraction consisted of saturated n-aldehydes, n-alcohols and free n-alkanoic acids of carbon chain lengths between 22 and 32, with carbon chain lengths of 26 and 28 dominating. Also odd-numbered unbranched hydrocarbons, mainly C27, C29 and C31, were detected particularly in the acetone-insoluble fraction (total, 15.8%). Triterpenoic acids were separated from the hexane-insoluble matter and identified as a mixture of ursolic, oleanolic and betulinic acids. The major constituents of the hexane-soluble fraction were glycerides of linoleicand oleic acids, accompanied by free linoleic, oleic and palmitic acids. Moreover beta-sitosterol, Delta(5)-avenasterol as well as trace amounts of other sterols were assigned. Finally the carotenoids phytoene and phytofluene were identified, yielding 1.0 and 0.3% of the quince wax, respectively.

Evaluation of free radical scavenging and antihemolytic activities of quince (Cydonia oblonga) leaf: a comparative study with green tea (Camellia sinensis).
Food Chem Toxicol. 2009 Jan 20. Costa RM, Magalhães AS, Pereira JA, Andrade PB, Valentão P, Carvalho M, Silva BM. CEBIMED, Faculdade de Ciências da Saúde, Universidade Fernando Pessoa, R. Carlos da Maia, 296, 4200-150 Porto, Portugal.
This study aimed to determine the phenolic profile and to investigate the antioxidant potential of quince (Cydonia oblonga) leaf, comparing it with green tea (Camellia sinensis). For these purposes, methanolic extracts were prepared and phenolics content of quince leaf was determined by HPLC/UV. The antioxidant properties were assessed by Folin-Ciocalteu reducing capacity assay and by the ability to quench the stable free radical 2,2'-diphenyl-1-picrylhydrazyl (DPPH) and to inhibit the 2,2'-azobis(2-amidinopropane) dihydrochloride (AAPH)-induced oxidative hemolysis of human erythrocytes. 5-O-Caffeoylquinic acid was found to be the major phenolic compound in quince leaf extract. Cydonia oblonga leaf exhibited a significantly higher reducing power than green tea. Cydonia oblonga leaf extracts showed similar DPPH radical scavenging activities but significantly higher than those presented by green tea (EC(50) mean value of 12.7 +/- 0.1 mug/ml). Under the oxidative action of AAPH, quince leaf methanolic extract significantly protected the erythrocyte membrane from hemolysis in a similar manner to that found for green tea. These results point that Cydonia oblonga leaf may have application as preventive or therapeutic agent in diseases in which free radicals are involved.

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