The energy content of each type of jams was calculated by
summation of multiplication of protein, carbohydrate and
fat by values of 4, 4 and 9 factors, respectively. The value is
expressed as kilocalories (kcal). The moisture content was
determined by drying of finely ground samples (10 g) in airoven
at 105 C overnight until a constant weight was achieved
(AOAC, 2008). Protein content was determined based on
Kjeldahl method (AOAC, 2005). A conversion factor of 6.25
was used to convert the measured nitrogen content to protein
content.