Study of the Optimal Parameters for the Formation of Selenium Complex with the (NEDA) N- (1-naphthyl-ethylenediamine dihydrochloride) C_12 H_14 N_(2. 2) 〖HCl〗_ Reagent and its use for the Control of Selenium Microcapsules

Selenium is an essential nutritional mineral, and selenium deficiency diseases are known in medical literature. Studies have shown that selenium intake in high doses is toxic in humans. Selenium is widely distributed in nature and due to the importance of selenium and its compounds in industrial applications; several analytical techniques have been reported to estimate selenium. In this study the optimal conditions for the formation of selenium complex with NEDA reagent will be studied and used for the control of selenium microcapsules, a method that is characterized by being rapid, sensitive and selective. The optical spectrophotometric method was used in the visible field at 540 nm wavelength to determine the complex between the selenium ion and the NEDA reagent under optimal conditions for complex formation namely temperature 50℃, time min t = 240, added reagent volume V=4ml, and reagent concentration 1%. This method showed good accuracy and correctness, as the method's validity was achieved through the relative percentage yield (R = 99.68%), while the accuracy of the method was achieved through the low value of the standard deviation (SD≤) (1.172) and thus the percentage relative standard deviation (RSD≤) (1.725). Selenium microcapsules were prepared, with an entrapment efficiency of 36% at a concentration of 3% for alginate and 1% while the entrapment efficiency rose to 51.2% at a concentration of 2% for calcium chloride.

Effect of addittion Vitamin E and Selenium and conservation degree (4c⁰) on motility and viability of local rooster sperm

In this study are evaluated the effects of addition of vitamin E and Selenium on the sperm motility and vitality of Syrian rooster, at storing at 4 C⁰ for 24 and 48 hours. The Results showed that the addition of both vitamin E and E with Selenium improved the sperm vitality and movement, but the vibration movement was decreased during 24 and 48 hours. Our results also showed that the concentration of (5mg E+0.6mg Se) gave the highest value of sperm vitality, rapid and slow movement with 17.79%, 10.65%, 8. 28% respectively for 24 hours, and 19.29%, 10.06% 10.37% respectively for 48 hours. Whereas the concentration of (10 mgE+0.6 Se) gave the lowest values of mentionned parameters. Contrarily, the first concentration gave the lowest and the second the highest values of the vibration movement. Finally, the statistical analysis (p<0.001) showed a significant difference between studied parameters.