Background: Determination of Iodine value (IV) along with factors like acid value, peroxide value, saponification value, solid fat index, refraction value, and trans fatty acid content is an important factor in controlling edible oils and fats. In unsaturated fatty acids, IV is a measure of the degree of unsaturation. The range of figures for IV of the various groups of oils and fats are therefore different. The Iv is usually determined by wijs or Hanus titration method, but recently for quick determination FT-NIR has been introduced. In this study, we compare the IV figures of Hanus and FT-NIR methods.

Materials and methods: For this project, 20 samples (7 solid and 13 liquid) were obtained from domestic oil factories. 100-200mg of liquid oil (250mg of solid sample) were dissolved in 10ml of chloroform and 25ml of Hanus solution was added and kept in dark place for 30 minutes. 10ml of KI solution and 100ml of distilled water were then added and titrated with sodium thio sulfate (0.1N). After the color of solution turned yellow, 2-3 drops of starch solution was added and titration was continued until the blue color disappeared. IV was then calculated using Hanus equation. For FT-NIR all liquid samples were put into sample holding directly and solid samples first melted and then poured into sample holding and IV was determined using special software.

Results: IV figures showed 0.5 to 4.5% (65% < 3% and only 35% showed 3 to 4.5%) difference between the two methods (NS). 90% of samples showed higher IV with FT-NIR as compared to Hanus method. Determining IV by Hanus required 45-60 minutes, whereas for FT-NIR it will take 2-3 minutes.

Conclusion: Results have revealed the feasibility of using FT-NIR to measure IV in oils and fats. There are major advantages of using FT-NIR as follows: provide faster analysis method, no sample preparation is required, eliminating the usage of solvents, reagents and glassware in control laboratories and finally very low level of operator error may occur.

Background: Most aspects of development are dependent or guided by visual system. Defect of visual perception can cause secondary mental retardation in cerebral palsy children with normal intelligence. So, identifying the effective factors on visual perceptual skills and early treatment of them in these children can prevent learning disorders, slowing the treatment process and secondary problems. This study was designed to compare the effect of chronological age, strabismus and sex factors on visual perceptual quotient.

Materials and Methods: In this cross-sectional study, 120 spastic cerebral palsy children with equal numbers of strabismal/non-strabismal disorder (age 8-10 years) were randomly selected from exceptional schools of educational departments and rehabilitation clinics of Tehran and were evaluated with the test of visual perceptual skill-revised (TVPS-R).

Results: The results showed that the scores of visual perceptual quotient (P<0.0001) and visual perceptual age were significantly different among 8 to 10 years old children (P<0.0001). There was no significant difference in visual perceptual quotient between two sexes (P=0.76) and that non-strabismal children had greater visual perceptual quotient compared to strabismal one (P<0.0001).

Conclusion: It can be concluded that age and strabismus have a significant effect on visual perceptual quotient, while this is not the case on sex.