Biochemical Studies on Whey Lipid Substances

The present work was undertaken to determine the lipid materials of salted and unsalted whey as a byproduct of cheese industry. The general chemical analysis show that the salted whey contained lower amounts of lactase, proteins and lipids compared with unsalted whey. Whey lipids contained palmitic and oleic acids as the most abundant saturated and unsaturated acids, respectively. The presence of salt quantitatively altered the concentration of short-chain fatty acids due to its salting out phenomenon. A wide variety of hydrocarbons was found and C₂₂, C₂₃ constituted over 75% of the total hydrocarbons. The presence of salt in whey remarkably changed the hydrocarbon profile. The most predominant phospholipid was phosphatidyl choline followed by phosphatidyl inositol. Once more, the salt changed qualitatively and quantitatively the whey phospholipid pattern and led to precipitate some of the highly polar phospholipids with cheese during milk processing.     

Effect of Gamma Irradiation on Egyption Sweet Potato Starch

Results showed that treatment of sweet potato starch with different doses of gamma irradiation caused increase in starch acidity and reducing sugars as well as molecular degradation, occurred as a result of the marked decrease in viscosity and intrinsic viscosity and water absorption while the solubility increased.     

La (III) Separation by Tri Octyl Phosphine Oxide (Cyanex 921) Based on Amberlite Xad-4 Chelating Resin

The novel core–shell type polymeric supports with accessible phosphorus groups were synthesised in the search for new reactive materials designed for the synthesis of functional resins. Amberlite XAD-4 adsorbent was impregnated with tri octyl phosphine oxides (Cyanex 921), which were then polymerized in the polymer carrier structure. The syntheses were evaluated by capturing FT-IR spectra, SEM micrographs, and analysing the sorption process. Batch studies were conducted to study the influence of some factors like pH, contact time, the metal ions concentration, and temperature on sorption efficiency of La (III) ions. The results showed that the optimum conditions were at pH equal to 0.5 and an equilibrium contact time of 30 min. According to the results of the sorption data analysis, the pseudo-second-order and Langmuir models were better fitted than the other estimated models. The sorption capacity of La (III) ions into impregnated resin as adsorbent martial was 54.25 mg g^?1. The results revealed that the used adsorbent has been used successfully as a promising material for the elimination and recovery of La ions from the aqueous solutions. The impregnated resin exhibits a high chemical stability, reusability and fast equilibration. Further, the above procedure has been successfully employed for the application of real sample.