الفهرس 
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Abstract
ABSTRACT
The main aim of this work study the drying parameters and basil quality under different drying systems. Also, study the effect of different extraction methods on essential oil yield and composition of sweet basil to determine the best drying methods of conserving the major essential oil compounds of basil. The work were divided into two parts: The First part to study the effect of different drying systems (sun-drying, shadow-drying, room temperature-drying, solar-drying and oven-drying) on weight loss, moisture content and equilibrium moisture content of basil plants. The Second part to study the effect of different extraction methods on essential oil yield and composition of sweet basil to determine the best drying methods of conserving the major essential oil compounds of basil. The obtained results indicated that the accumulated weight loss of basil plants increased from 3.57 to 83.76, 2.12 to 70.48, 0.72 to 82.07, 0.44 to 84.34 and 1.29 to 84.90 %, for sun-drying system, shadow-drying system, room-drying system, solar-drying system and oven-drying system, respectively. The moisture content of basil plants decreased from 515.95 to 6.91, 490.18 to 6.59, 479.97 to 4.66, 538.02 to 0.93 and 565.40 to 5.40 % d.b. for sun-drying system, shadow-drying system, room-drying system, solar-drying system and oven-drying system