الفهرس 
صفحة العنوانOnly 14 pages are availabe for public view
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Abstract
The study was carried out to investigate the beneficial use of
indigestible sugars: Mannitol and stevia dry leaves powder (individually
and in combination) as low caloric food supplement in preparation of Pan
Bread and Chocolate Nut Spread. Moreover, study investigated the
biological effect of (Mannitol-M) and (stevia dry leaves powder-ST) each
individually and in combination in experimental rats (male albino). The
results showed that, stevia plants are a good source of carbohydrates
(63.90%), crude fiber (11.32 %), ash (10.32%), total flavonoids (826.7
mg/lOOg) and minerals (calcium 1220 mg /l 00 g and phosphorus 330
mg/100g). Partial replacement of sucrose by mannitol at 75% provides
wheat flour (70%) with better rheological properties according to
extenso graph test results. Water absorption (%) increased in all
supplemented samples with mannitol and stevia leaves powder than that
of the control. Mannitol (M) and stevia leaves powder (ST) had no effect
on yeast fermentation. The physical evaluation of Pan bread illustrated
that water uptake (ml) increased during preparation of dough
supplemented with Stevia leaves powder compared to control. It was
found that Pan bread sample supplemented with combination of mannitol
and stevia (M75%-ST25%) had the highest value (as % relative to
control) regards: height (cm), area (cm”), volume (cm’) and index to
volume (110.9%, 113.5%, 138.3% and 105.4%, respectively). Among all
the prepared bread samples, degree of bread softness increased upon
replacement with M100% (192.6 mm/sec) as compared to the control
sample (177 mmlsec) after storage period of 7 days at 25°C. Product color
as measured by Hunter colorimeter, indicated that Pan bread showed to
have higher values. for lightness (L) in supplemented samples with
mannitol, while redness (a) values decreased in all the supplemented
bread samples except for bread sample supplemented with ST (100 %).
Sensory evaluation results of Pan bread indicated that the supplemented.