| The effect of ultrasound pretreatment on the drying kinetics of nettle leaf (Urtica dioic L.) with an infrared dryer. |
| Paper ID : 1276-NICAME1402 |
| Authors: |
|
Ayda Naghali1, Faroogh Sharifian *2, Sasan Keramat3, Ali Hasanpour2 1department of biosystem engineering, agriculture faculty,Urmia university, Urmia, Iran 2Urmia University, Urmia, Iran 3Department of Biosystems Mechanical Engineering, Faculty of Agriculture, Urmia University, Urmia, Iran |
| Abstract: |
| The nettle, as its name suggests, has parts covered with cone-shaped and stinging webs. It is one of the important sources of antioxidants that reduce stroke, and the effect of nettle hydroalcoholic extract on skin ulcers has been confirmed. Examining the effect of ultrasonic pretreatment in the process of drying nettle leaves with infrared radiation showed that increasing the duration of ultrasonic pretreatment and the temperature of the dryer due to helping to remove moisture increases the drying rate of nettle at a temperature of 50 degrees, the effective diffusion coefficient of the control sample and the 10-minute ultrasonic pretreatment are 1.65×10-6 and 4.219×10-6 m2/s, respectively, which indicates an increase in the effective diffusion coefficient with increasing drying time. The ultrasound pretreatment does not have much effect on the difference of color change index and chroma index, as well as the amount of Rehydration ratio, while changes can be observed with increasing temperature. |
| Keywords: |
| nettle leaf , infrared, ultrasound, moisture effective diffusion coefficient, color, water reabsorption coefficient |
| Status : Paper Accepted (Poster Presentation) |
