EFFECT OF SOME OIL EMULSIONS AND WAX TREATMENTS ON PROLONGING STORAGE PERIOD OF WASHINGTON NAVEL ORANGE FRUITS AND THEIR VOLATILE COMPONENTS | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 4, Volume 31, Issue 4, April 2006, Page 2513-2532 PDF (6.18 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2006.203137 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Eman A. A. Abd El-Moneim1; Magda A. Abd El-Mageed2 | ||||
| 1Hort. Cultural Crops Technology Dept. . NRC. Dokki, Cairo. Egypt. | ||||
| 2Chemistry of Flavour and Aromatic Dept. NRC. Dokki, Cairo. Egypt. | ||||
| Abstract | ||||
| This study was carried out during 2004 and 2005 seasons on the postharvest behavior of Washington Navel orange fruits during cold storage. Fruits were divided into seven groups. The fruits of first group was left without coating (control), while the six other groups were coated separately with wax liquid, jojoba oil, sesam oil, paraffin oil, orange oil and corn oil emulsion, then stored at 5° i 1°C and 85—90% RH. The fruits were examined every 15 days for 90 days storage period. Coating with jojoba oil and orange oil were the best in reducing fruit decay and weight loss and increasing fruits storage life. As storage days progressed T.S.S. increased , however titratable acidity and ascorbic acid contents decreased. The headspace volatiles of freshly harvested fruits, coated and uncoated (control) stored fruit samples were collected and subjected to GO and GC-MS. analysis. 35 volatile Components were identified, Including 7 esters, 5 terpenic hydrocarbons, 12 alcohols, 5 aidehydes, 3 ketones and others. Volatile composition varied quantitatively during storage rather than qualitatively. Generally, coated fruits showed significant increase in component quantities that consider important to fresh orange flavour such as ethylbutyrate, methyibutyrate, ethylacetate. a -pinene, octanal, nonanal, neral and iinalood. By comparing the volatile profile of coated fruit samples to fresh fruit samples, it was clear that jojoba oil, orange oil and corn oil coating exhibited high quality during storage period. | ||||
| Keywords | ||||
| Navel orange; cold storage. wax; oil emulsions; volatile components | ||||
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