الفهرس 
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Abstract
The present work attempted the isolation of some vitamins from natural sources rather than their synthetic preparation by virte of the vital importance of vitamins to normal functioning of the human tissues thus the quantitative determination of bB carotene precursor of vitamin A vitamin C and vitamin E was carried out in the ollwing algae dunliella salina nannochloropsis salina known as marine chlorella ulva rigida and gelidium latifolum.