الفهرس 
cover eOnly 14 pages are availabe for public view
 |  | from | 214 |  |  |
| | | from | 214 | | |
Abstract
The main objectives of work are to experiments and measurements for the physical, chemical, optical and electrical properties of strawberry fruits. Strawberries were classified into three grades according to the variety of strawberry (Festival, Fortona and Red marline). The strawberry fruits were exposure by visible laser to detriment optical and electrical signal reflections of strawberry at different properties of visible lasers543.5and 632.8 nm and power 4mW. The samples were classified into six kinds of defects of strawberry according to codex specification of strawberry. It found that 1-Physical properties: The average value of volume for all strawberry varieties were (11.63, 16.446 and 12.262 mm3) festival, fortona and red marlin verities respectively so the high value of physical properties was fortona variety while the low value is festival variety, but the physical properties of red marlin variety intermediate between value of fortona and festival variety. 2-Chemical properties: The average value of Brix and PH for all strawberry varieties were (7.5, 7.14 and 6.78) and (3.6, 3.45 and 3.42) festival, fortona and red marlin verities respectively so the high value of physical properties (Brix) was festival variety while the low value is red marlin variety, but the chemical properties of fortona variety intermediate between value of fortona and festival variety. 3-Optical properties: 1- The high values of reflection intensity for all strawberry varieties were from control samples (standard) for festival variety (36.42 and 40.41lux) respectively for two types of wave longs laser, the value of reflection intensity were gradual decreased form (standard , mold , insect green tip , white shoulder and green of strawberry defects for all varieties of strawberry. The reflection intensities equal or more than these values strawberry will be high quality but the, the reflection intensities less than these values strawberry will be low quality. 2-The high values of electrical signals for all strawberry varieties were from control samples (standard) for festival variety (19.31and 24.62 mV) respectively for two types of wave longs laser, the value of electrical signals were gradual decreased form (standard , mold , insect green tip , white shoulder and green of strawberry defects for all varieties of strawberry. The electrical signals equal or more than these values strawberry will be high quality but the, electrical signals less than these values strawberry will be low quality. 3-Also the values of absorption incising gradually form (standard, mold, insect green tip, white shoulder and green of strawberry defects for all varieties of strawberry.