the gas separation performance of commercial ceramic titania and hybrid silica (hybsi®) membranes was assessed using the gas permeation and permporometry methods. results indicated that the hybsi® membranes have a hybrid surface containing regions covered by a polymeric matrix and others with inorganic pores. these membranes have high h2 selectivity, which increases significantly with temperatu...

In vertebrates, the nuclear envelope (NE) assembles and disassembles during mitosis. As the NE is a complex structure consisting of inner and outer membranes, nuclear pore complexes (NPCs) and the nuclear lamina, NE assembly must be a controlled and systematic process. In Xenopus egg extracts, NE assembly is mediated by two distinct membrane vesicle populations, termed NEP-A and NEP-B. Here, we...

Lipid-protein interactions in thylakoid membranes from lettuce, pea, tomato, and cucumber have been studied using spin-labeled analogues of the thylakoid membrane lipid components, monogalactosyl diglyceride and phosphatidylglycerol. The electron spin resonance spectra of the spin-labeled lipids all consist of two components, one corresponding to the fluid lipid environment in the membranes and...

Solvent separations present one of the largest opportunities for membrane technologies. Currently, industries use millions tons solvents manufacture drugs, oils and chemicals. Multiple purifications must be conducted in order to purify products from solvents. However, existing separation processes are energy-intensive. Organic solvent nanofiltration (OSN) or solvent-resistant has emerged as an ...

We describe the fabrication of asymmetric nanopores sensitive to ultraviolet (UV) light, and give a detailed account of the divalent ionic transport through these pores using a theoretical model based on the Nernst-Planck equations. The pore surface is decorated with lysine chains having pH-sensitive (amine and carboxylic acid) moieties that are caged with photo-labile 4,5-dimethoxy-2-nitrobenz...

A systematic study of pseudotemary systems made of salted water, pentanol and SDS is presented for salt concentrations ranging from 20 to 80 g/l of Nacl. In the dilute part of the phase diagram, the system with the lowest salt concentration is known to present a continuous phase transition between phases of randomly interconnected membranes, namely a sponge (symmetric) and an asymmetric phase, ...

We present a micro-device in which more than 10,000 asymmetric lipid bilayer membranes are formed at a time on micro-chamber arrays. The arrayed asymmetric lipid bilayers, where lipid compositions are different between the inner and outer leaflets, are formed with high efficiency of over 97% by injecting several types of liquids into a micro-device that has hydrophilic-in-hydrophobic surfaces. ...

Lipids that have two tails of different lengths are found throughout biomembranes in nature, yet the effects this asymmetry on membrane properties not well understood, especially when it comes to dynamics. Here we study nanoscale bending fluctuations model mixed-chain 14:0–18:0 PC (MSPC) and 18:0–14:0 (SMPC) lipid bilayers using neutron spin echo (NSE) spectroscopy. We find despite partial inte...

Ceramic membranes have become one of the most rapidly developing and promising membrane materials owing to their excellent properties. Compared with other materials, ceramic are widely used in wastewater water treatment fields advantages, including higher chemical stability, stronger mechanical strength, longer service life, better filtration performance. In this paper, sources raw preparation ...