Separation of phenylalanine and tyrosine by ion-exchange using a strong-base anionic resin. I. Breakthrough curves analysis

Recovery of Acetoin from the Ethanol–Acetoin–Acetic Acid Ternary Mixture Based on Adsorption Methodology Using a Hyper-Cross-Linked Resin

“…This is because the least-adsorbed substance ethanol was displaced and desorbed simultaneously by the middle adsorbed one (acetic acid), whereas the most adsorbed component (acetoin) replaced acetic acid as well. According to Moreira and Ferreira, the overshoot phenomena in adsorption multicomponent systems as a result of the competition for active sites on the resin can be predicted by the equilibrium theory and considering the column divided into zones of unique compositions, called plateaus, separated from each other by zones of varying compositions, called transitions. The peaks in the concentrations during the breakthrough of ethanol and acetic acid occur at times of 96 and 107 min, respectively.…”

Effect of diffusional bridging in multicapillary packing

“…An abundant literature describes the computation and simulation of chromatographic performance of beds of particles based on either purely mathematical or computational calculations [24][25][26][27][28]43]. Computational models are based on different classical schemes, generally propagation through a grid, or an integrated set of differential equations.…”

“…The simulation of radial diffusional effects in chromatographic columns has been undertaken. The focus of previous studies has been mainly on considering axial diffusion, in one-dimensional column models, because of its direct effect on peak broadening [24][25][26][27][28]. Some studies [29][30][31] examined the effect of a radial transfer phenomenon, heat transfer, on the efficiency of UHPLC columns.…”

The cleaner production of monosodium l -glutamate by resin-filled electro-membrane reactor

“…The annual production of NaGA is estimated to be 2 million tons, which is nearly half of the total amino acid production [1][2][3]. A microbial fermentation method is typically used for its industrial production.…”