a. fadavi

The super-beneficial food contains compounds with biological activity that promote health. Pasta is a suitable carrier for adding nutrients from various agricultural wastes. Nowadays, the use of synthetic antioxidants is limited due to the risks they have for health, therefore, the effort to find natural antioxidants of plant origin has increased.

Based on the formulation, the effect of adding 0 to 0.5 percent of saffron residues, including petals, yellow stamens, and white roots, on the physicochemical, antioxidant, texture, and sensory properties by comparing averages using Duncan's test was performed at a confidence level of 95% using SPSS version 19 software and the analysis of the data obtained from the treatments of di-optimal mixed design was carried out using Design Expert software. The standard was checked in the form of di-optimal mixed design.

During the analysis of the results after optimization, from the total of 0.5% of the remaining saffron, the values ​​of 0.072% of the petal share, 0.028% of the white root share and 0.4% of the flag share were suggested by the software.

The addition of saffron residue had no significant effect on the amount of moisture, water-soluble solids, weight and pH after cooking, while a significant effect was observed on the amount of total phenol, antioxidant, and anthocyanin, as well as the pasta texture. Enriched had less strength than the control sample and no significant difference was observed in sensory properties. Therefore, the addition of saffron residues while maintaining the physicochemical and sensory properties is important in the production of beneficial pasta.

Cyclone separators are used to separate the solid particles from the gas streams in industrial applications. A strong swirling turbulent flow inside the aero-cyclone causes the particle separation due to their inertia. Two important parameters for cyclone design are the pressure drop and separation efficiency. The cyclone geometry strongly affects the efficiency and pressure drop. Therefore, in this article, different new geometries for the vortex finder of the cyclone are considered and tested experimentally. The efficiency and pressure drop have been measured and compared for different fabricated vortex finders. A typical high-efficiency Stairmand cyclone was considered and the guide vanes with an angle of 10 and 20 degrees to the horizontal plane were added to the original vortex finder. Experimental results show that for the guide vanes with 20 degrees angle, and at the gas velocities between 10 and 20 m/s, the pressure drop is reduced by 58% and the efficiency is increased by 2.3%.

Aspergillus flavus is one of the hazardous fungi which appear in poor storage conditions. This mold produces dangerous toxins of aflatoxins in corn grains. Hence the investigation of reduction possibility of its growth and toxins is important. In this research the effects of calcium oxide (0, %0.5 and %1) and gamma ray (0, 5, 10, 15 and 20 KGy) on growth of Aspergillus flavus and levels of aflatoxin B1 (AFB1), aflatoxin B2 (AFB2), aflatoxin G1 (AFG1 and aflatoxin G2 (AFG2) were investigated. Analysis of variance showed significant effects of irradiation (P<0.0001), calcium oxide (P<0.001) and their interactions (P<0.0001). Aspergillus flavus and AFB1 and AFB2 toxins decreased with increasing irradiation. Further reduction of AFB1 and AFB2 toxins was observed during accompaniment of 0.5% calcium oxide with irradiation. However, simultaneous application of 1% calcium oxide with radiation prevented and reduced more Aspergillus flavus. AFG1 and AFG2 toxins were not detected in any of the samples. Consequently, with considering 10 KGy standard food irradiation limits, it is recommended that 0.5% calcium oxide concentration before storage and irradiation intensity of 10 KGy after storage were applied for corn grains to control mold growth and production of aflatoxin toxins.