الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Avocado (Persea americana Mill) is becoming popular in many countries and the Hass avocado cultivar is the major global avocado variety of avocados selected in this study in
addition to the Fuerte variety due to its high content of oil.
This study aimed to evaluate and utilize the avocado pulp, oil and defatted pulp through the following points:
1- Study the physical properties of avocado fruit.
2- Determination of the proximate chemical composition of avocado pulp and defatted pulp.
3- Determination of some bioactive compounds in avocado pulp and defatted pulp.
4- Extraction of avocado pulp oil and determining its physical and chemical characteristics.
5- Study the technological applications of avocado pulp, oil and defatted pulp to prepare
chocolate spread and to determine and evaluate the effect of supplementation of chocolate spread with them on the quality of the final product.
The main results obtained in this study can be summarized as follows:
A) Physical properties of avocado fruit
1- The average values of avocado fruit weight were 310.88 and 210.95 g in Fuerte and Hass verities, respectively.
2- The average values of avocado fruit length were 12.69 and 9.57 cm in Fuerte and
Hass verities, respectively.
3- The average values of avocado fruit width were 6.64 and 6.43 cm in Fuerte and Hass verities, respectively.
4- The average values of avocado fruit volume were 378.33 and 245 ml in Fuerte and Hass verities, respectively.
5- The average values of avocado fruit density were 0.82 and 0.87 g/cm3
in Fuerte and Hass verities, respectively.
6- The percentages of avocado pulp weight were 73.92 and 69.25% in Fuerte and Hass verities, respectively.
7- The percentages of avocado seed weight were 13.54 and 16.42 % in Fuerte and Hass verities, respectively.
8- The percentages of avocado peel weight were 12.33 and 14.45 % in Fuerte and Hass verities, respectively.
B) Physicochemical properties of avocado pulp
1- Avocado pulp colour values in Fuerte and Hass cultivars were L* (46.36 and 45.71), a* (-2.87 and -4.18) and b*(25.27 and 25.79), respectively.
Summary and Conclusion
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2- Total soluble solids values in pulp were 5.83 and 6.00 % in Fuerte and Hass verities, respectively.
3- pH values for pulp were 6.77 and 6.11 in Fuerte and Hass verities, respectively.
4- Titratable acidity values of pulp were 0.14 and 0.12 % as malic acid in Fuerte and Hass verities, respectively.