4. Conclusions
This paper has given an account of and the reasons for the use of ultrasound in the food industry. This study was designed to determine the effects of different ultrasound powers (30 W, 60 W, 90 W) and treatment times (5M, 10M) on quality of strawberry. Contrary to expectations, this study did not find a significant difference between treatment times. It was however found that, ultrasound power between 30 W and 60 W could be used to extend shelf life of strawberry. It was observed that the high power ultrasound (90 W or higher) presents detrimental effects on strawberry quality. The empirical findings in this study provide a new understanding of ultrasound power. Finally, this research has
shown that ultrasound power should be adjusted depending on the desired effect. Second major finding was that FT-NIR technology offers the nondestructive evaluation of some quality attributes as sugar and water content. Further researches in this topic regarding the role of different treatment times would be great help in understanding the different effects on quality of fruits and vegetables.