Separation of single component of EPA and DHA from fish oil using silver ion modified molecular sieve 13X under supercritical condition

Recent advances in chemistry, biochemistry, and nutrition of dates palm fruit (Phoenix dactylifera L.) cultivars

Date palm trees, fruits and leaves have historic life changes with human beings, and their utilizations started by using them as foods and remedy, especially against the resulting bruises of consecutive wars involving wounds, burnes and invasive diseases such as Malaria, Cholera and recently against the emergence of Covid-19 disease symptoms. The richness of palm date- fruits with reducing sugars, polyphenolic acids, flavonoid compounds, hydrosoluble and liposoluble vitamins makes them as versatile food and feed products. In part, minerals remain as the catalyst elements for these golden fruits. In other part, the distribution of essential oils at the mesocarps of date fruits and into date pits constitutes other integral part with substantial therapeutic and nutrigenomic contributions. Polyphenol oxidase (PPO) is a bound enzyme involved in the ripening of the date fruits. The aim of this book chapter is devoted in exploring the recent advances in date palm fruit cultivars as natural bioresources and the key elements beyond to their chemistry, biochemistry, and nutrition aspects, shedding lights on their important metabolites in enhancing food nutritional values, and human health attributes.

Separation of eicosapentaenoic acid and docosahexaenoic acid by three-zone simulated moving bed chromatography

Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are essential fatty acids for human body, which are widely used in the field of healthy food and medicine. Meanwhile, there are some differences in their physiological functions, such as "scavenger for blood vessel" of EPA and "brain protector" of DHA. In order to make full use of EPA and DHA, it is necessary to prepare their high-purity component. In this paper, EPA and DHA were separated and purified by three-zone simulated moving bed (SMB) chromatography with C18 used as stationary phase and ethanol-water as mobile phase. For the single column experiment, a separation unit of SMB, the effects of the ratio of ethanol to water, pH value and temperature on the separation were investigated. The equilibrium dispersion (ED) model was used to obtain the adsorption parameters of EPA and DHA by inverse method and genetic algorithm, and the accuracy of the adsorption parameters was verified by fitting the overloaded elution curves under different conditions. Based on the acquired nonlinear adsorption isotherms the complete separation region was found according to triangle theory. The effects of sample concentration, flow ratios of adsorption zone and rectification zone, and column distribution mode of SMB on the separation were investigated. Under the optimized SMB conditions, the experimental result was that without regard to the other components, the chromatographic purity and recovery values of EPA and DHA exceeded 99% with the productivity of 4.15 g/L/h, and the solvent consumption of 1.11 L/g.