QUALITY EVALUATION OF STRAWBERRY FRUIT USING VISABLE LASER

khalid ahmed abd el-rasoul

Abstract


The main objectives of work are to experiments and measurements for the optical, electrical, physical and chemical properties of strawberry fruits. Strawberry were classified into three grades according to The varieties of strawberry (Festival ,Fortona and Red Marline Strawberry). The strawberry fruits were exposure by visible laser to determine optical and electrical signal reflections of strawberry. The samples were classified into six kinds of defects of strawberry according to codex specification of strawberry. It was found that 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

It was found that mass increased also gradually with volume. The density of strawberry fruits increasing by increasing the mass of fruit.  Also,  the high value of chemical properties  Brix value was Festival variety (7.5) , while  the  Brix low value of Red Marlin variety (6.78 ), but the chemical properties Brix of  Fortona variety (7.14) intermediate  between value  of  Festival  and  Red Marlin variety. The electric signal high value were  from control samples (standard) while the low values were from green tip defect for Festival, Fortona and Red Marlin varies of strawberry defects, it was found that, the values of electrical signals were gradual decreased for control (standard , mold , insect green tip , white shoulder and green of strawberry defects) . It was noticed that the high values of reflection intensities were from control samples (standard) while the low values were from green tip defect for festival, fortona and red marlin varies of strawberry defects. So, the value of reflection intensities were gradual decreased for control (standard , mold , insect, green tip , white shoulder and green of strawberry defects

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