This study was investigated at the laboratories of Horticultural department,
Faculty of Agriculture, Damascus University to measure the changes in
oxidative and antioxidative parameters during tomato fruit growth. Hydrogen
peroxide (H2O2) and lipi
d peroxidation (MDA) contents were analysed as
indicators of oxidative processes. Results showed that H2O2 content decreased
during fruit growth phase and slightly increased during ripening, meanwhile
MDA content was found to increase only at the end of fruit ripening. The
activities of antioxidant enzymes (SOD, APX, CAT) were modified during fruit
growth. Activities of SOD, APX increased during fruit growth phase,
meanwhile CAT activity increased during fruit maturation. The level of
ascorbate increased during fruit growth. These changes in antioxidant
metabolites and enzymes establish that the antioxidant system plays an
important role in the both phases of tomato fruit growth.
This paper describes a study of the influence of extraction system
(centrifugation and pressure system) on the chemical composition and sensory
quality of Dan virgin olive oils produced in Syria. Analysis of the effect of the
extraction system on
the values of analytical determination revealed
statistically significant differences (P≤0.05) in a few parameters only, mainly in
antioxidant content and oxidative stability. The results appear to confirm the
influence of the extraction system on the quality of Dan virgin olive oils.
Soft wheat is a good source of Phytic acid. The objective of this
work was to develop wheat phytic acid extraction and purification
techniques.