Macadamia integrifolia Maiden and Betche (Proteaceae) is one of the major tree crops of the world. In addition to its
nutritional value, macadamia also contains a number of phytochemicals that are responsible for a variety of bioactivities,
among which hypocholesterolic activity which has been frequently studied. No previous studies were done on the
Macadamia cultivated in Egypt, this encouraged the authors to perform the present study aiming to throw light on the
nutritional profile of title plant.
Proximate analysis of the leaves, pericarp and kernel Macadamia integrifolia Maiden and Betche includes the determination
of moisture content, total ash, total protein, total fats, total carbohydrates and crude fibers, study of vitamin E content by
using HPLC, determination of the mineral content according to Association of Official Analytical Chemists(A.A.O.C).
Macadamia showed a total fat (5.085%) in leaves, (67.96%) in kernel and (0.34%) in pericarp. The protein constitute (6.65
%) in leaves, (20.81%) in kernel and (6.91%) in pericarp. Carbohydrate constitutes (72.35%) in leaves, (5.8%) in kernel
and (77.58%) in pericarp. Moisture content ranged from (11.72%) in leaves, (2.83%) in kernel and (9,65%) in pericarp.
Ash content was (4.2%) in leaves, (2.6%) in kernel and (5.52%) in pericarp. The content of vitamin E in macadamia tested
parts was (133.18 mg/100gm) in leaves, (61.49 mg/100gm) in kernel and (98.78 mg/100gm) in pericarp. The mineral
contents of macadamia tested parts were resulted Calcium (851.51 mg/100gm) in leaves, (181.64 mg/100gm) in kernel and
(177.16 mg/100gm) in pericarp, Potassium (838.16 mg/100g) in leaves, (3458.14 mg/100gm) in kernel and (7803.68
mg/100gm) in pericarp, Sodium constitutes (309.36 mg/100g) in leaves, (69.67 mg/100gm) in kernel and (156.58
mg/100gm) in pericarp, Iron was (9.72 mg/100g) in leaves, (9.48 mg/100gm) in kernel and (9.75 mg/100gm) in pericarp
and Copper resulted (0.76 mg/100g) in leaves, (0.634 mg/100gm) in kernel and (0.668 mg/100gm) in pericarp.