EFFET OF STERILIZATION ON QUALITY OF CARAWAY (CARUM CARVI, L.) FRUITS USING LASER AND SAFE RADIATION WAVES

Document Type : Original Article

Authors

1 Agric. Eng.; Faculty of Agriculture, Cairo Univ., Egypt.

2 Laser Application in Agric. Eng. (NILES), Cairo Univ., Egypt.

3 Medicinal and Aromatic Plants Res. Dept. HRI. ARC., Egypt.

Abstract

In thiswork, threetypes of light used for Caraway fruits sterilization namely helium-neon (He-Ne) green laser at wavelength 543.5  nm, ultraviolet ( UV ) light  at  wavelength 245 nm  and  helium-neon (He-Ne)  red  laser at wavelength 632.8 nm with exposure times ( 1 , 3 , 5 , 10  and 15 min. ) with  the  aim of studying the  effect  for  type  of  radiation, exposure  time  and  their  interaction on Caraway  fruits. Investigated the measurements dimensions from length, width thickness, volume, diameter geometric, diameter area, frontal area, transverse area, sphericity with constant moisture to some of sterilization treatments for  Carum  Carvi, L.  fruits.  Also  in  this  work  studied the correlation for length/ width, length/ thickness, width/  thickness,  frontal area/ transverse area,  sphericity/ frontal area, sphericity/ transverse area, geometric diameter/ area diameter, sphericity/ geometric diameter and  sphericity/ area diameter. The obtained results indicated that sterilization treatment by He-Ne red laser at doses of 3 and 10 min. recorded the significant effects as increased in essential oil percentage, moisture content. Also the sterilization treatment by ultraviolet radiation at dose of 10 min. recorded significant effect in carbohydrate. Meanwhile, concerning  germination percentage, there was an observable  increased in germination percent with wavelength 632.8 nm with  dose of 3 min. and  ultraviolet  radiation (UV)  at  wavelength  245  nm  with  dose  of 15 min. Finally, it is recommend that using sterilization by helium-neon green at 10 min. in order to eliminate the microbial load.

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