Investigating the rheological properties of tomato under compressive loading

Ghorbannejad Shahrudi, Mersad and Golmohammadi, Abdollah (2015) Investigating the rheological properties of tomato under compressive loading. Masters thesis, University of Mohaghegh Ardabili.

Text (تعیین خواص رئولوژی گوجه فرنگی تحت بارگذاری فشاری) Mersad Ghorbannejad Shahrudi.pdf Download (623kB)

Abstract

Because of waste in tomato, each year a large amount of this product is lost during harvest and transportation. Physical and chemical properties of agricultural products depending on time, and this characteristics change over time. Damage in agricultural product created in various form. A form of damage depend on Physical and biological structure of product and measure of load. this paper study the effect of, temperature (environment temperature and 4 °C), face of product (in direction of fruit flower and 90 degree relative to flower), type (Petoerly-CH and Suuper Bta) and load (2,6,10 N) on fruit crush, during a 15 day period by using of materials testing machine. The results analyzed according to factorial experiment in a completely randomized plot. Also, using the device Testing, The Asiatic stress tests on the samples were applied tomatoes. The results showed that with decrease in temperature, fruit crush decreased. Also with increase the load from 2 N to 10 N, amount of fruit crush increase to 65%. And applying small loads on tomatoes significant effect on product quality leaves so that in most cases, the skin rot was clear. Also with increase the time of holding due to effective biochemical reaction on fruit ripe; activity of destroyer cell wall enzymes, the softening and product color changing will increase Neural network modeling results were observed in the amount of R (correlation) is equal to 0/99466 indicating that this technique to predict the rheological properties of tomatoes can be used provided. In terms of constant stress, public Kelvin rheological model to estimate the change in the strain of the right time.

Actions (login required)

View Item