Looking at current trends within downstream processing (DSP) of high value bioproducts, it shows that there are ongoing efforts in replacing batch processes by continuous variants. However, a unit procedure which still lacks simple and compact variant is diafiltration. Here, we present such single piece diafiltration equipment achieving buffer exchange up to 99.90%. The device composed 3D-print...

Anion-exchange membrane water electrolyzers (AEMWEs) are prepared as catalyst-coated membranes using varying amounts of ionomer in the catalyst layers.

To investigate the dynamics of exchange/transfer of lipids between membranes, we have studied the interaction of donor-deuterated DMPC vesicles with DMPC hybrid bilayers on Au nanoshells using SERS. Experimental data confirm partial lipid exchange/transfer in the outer leaflet of the hybrid bilayer. The kinetics of the exchange/transfer process follows a first order process with a rate constant...

Composite membranes were obtained by modification of heterogeneous polymer cation and anion-exchange membranes with nanoparticles of zirconium hydrophosphate and hydrated zirconium dioxide, respectively. The ion-exchange materials were investigated with the methods of electron microscopy, potentiometry, voltammetry, and impedance spectroscopy. Single nanoparticles, which were precipitated in aq...

Chemical cross-linking anion exchange series membranes were prepared from linear engineering plastics poly(2,6-dimethyl1,4-phenylene oxide) (PPO) by conducting the processes of bromination and amination at both benzyl and aryl positions. Compared with the traditional technologies, the membrane route described in this paper has cancelled the chloromethylation process and thus, given up the use o...

THE correction of electrolyte imbalance and the removal of retention products of the blood during renal failure is at present achieved by the use of artificial kidneys which permit the diffusion of solutes through a semi-permeable membrane. Several types of apparatus used successfully for hemodialysis include those described by Kolff and Watschinger (1956) and Alwall, Norviit, and Steins (1948)...

The time variation in emf caused by pressure differences has been used to find transference coefficients of water as well as water permeabilities in ion exchange membranes. Previous experimental methods have been corrected and facilitated. The cation exchange membrane CR61 AZL 386 was investigated. Equilibrium solutions contained 10-4 kmol_m-3 < CKC~ < 10-1 kmol_m-3, or constant concentration o...

The effects of pronase and/or SDS pretreatment on Na+-Ca2+ exchange were studied in rat brain microsomal membranes. Pronase in concentrations that liberated 11% of the membrane proteins stimulated the Na+-Ca2+ exchange. When about 24% of the proteins were split off, the results did not differ from those in control experiments. When 40% or more of the proteins were solubilized, Na+-Ca2+ exchange...