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Membranes, Volume 14, Issue 4

April 2024 - 23 articles

Cover Story: Ion-selective electrodes (ISEs) with membranes containing ionophores are increasingly used under non-zero current conditions, i.e., voltammetry and constant potential coulometry. The signals are interpreted assuming the Nernstian response of the ISEs, while the Nernst equation implies an electrochemical equilibrium at the membrane/sample interface. The following question arises: is the equilibrium violated by these currents? We show here that the exchange current estimated by impedance and chronopotentiometric measurements with Na+-ISE as a model system is significantly larger than the current flowing through ISEs during analysis in non-zero-current modes. This suggests that the equilibrium is not violated by the current flow, and implies validity of the Nernst equation for the interpretation of the data. View this paper
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Articles (23)

  • Article
  • Open Access
3 Citations
2,908 Views
15 Pages

Computational Insights into the Interaction of the Conserved Cysteine-Noose Domain of the Human Respiratory Syncytial Virus G Protein with the Canonical Fractalkine Binding site of Transmembrane Receptor CX3CR1 Isoforms

  • João Victor Piloto,
  • Raphael Vinicius Rodrigues Dias,
  • Wan Suk Augusto Mazucato,
  • Marcelo Andres Fossey,
  • Fernando Alves de Melo,
  • Fabio Ceneviva Lacerda Almeida,
  • Fatima Pereira de Souza and
  • Icaro Putinhon Caruso

The human Respiratory Syncytial Virus (hRSV) stands as one of the most common causes of acute respiratory diseases. The infectivity of this virus is intricately linked to its membrane proteins, notably the attachment glycoprotein (G protein). The lat...

  • Article
  • Open Access
4 Citations
5,419 Views
17 Pages

Hydrophilic Modification of Dialysis Membranes Sustains Middle Molecule Removal and Filtration Characteristics

  • Adam M. Zawada,
  • Karlee Emal,
  • Eva Förster,
  • Saeedeh Saremi,
  • Dirk Delinski,
  • Lukas Theis,
  • Florian Küng,
  • Wenhao Xie,
  • Joanie Werner and
  • Manuela Stauss-Grabo
  • + 3 authors

While efficient removal of uremic toxins and accumulated water is pivotal for the well-being of dialysis patients, protein adsorption to the dialyzer membrane reduces the performance of a dialyzer. Hydrophilic membrane modification with polyvinylpyrr...

  • Article
  • Open Access
10 Citations
4,088 Views
19 Pages

Experimental Study of a Sequential Membrane Process of Ultrafiltration and Nanofiltration for Efficient Polyphenol Extraction from Wine Lees

  • Miguel-Jorge Reig-Valor,
  • Javier Rozas-Martínez,
  • Alexis López-Borrell,
  • Jaime Lora-García and
  • María-Fernanda López-Pérez

The wine industry is a sector of great importance in the Spanish economy, contributing substantial annual revenues. However, one challenge facing the industry is the amount of waste generated, reaching millions of tons annually. These residues consis...

  • Review
  • Open Access
11 Citations
4,860 Views
19 Pages

Recent Advances in Dopamine-Based Membrane Surface Modification and Its Membrane Distillation Applications

  • Haodong Jia,
  • Jing Ren,
  • Yue Kong,
  • Zhongjia Ji,
  • Shujuan Guo and
  • Jianfeng Li

Surface modification of membranes is essential for improving flux and resistance to contamination for membranes. This is of great significance for membrane distillation, which relies on the vapor pressure difference across the membrane as the driving...

  • Review
  • Open Access
18 Citations
7,782 Views
21 Pages

Biogas Upgrading Using a Single-Membrane System: A Review

  • Wirginia Tomczak,
  • Marek Gryta,
  • Monika Daniluk and
  • Sławomir Żak

In recent years, the use of biogas as a natural gas substitute has gained great attention. Typically, in addition to methane (CH4), biogas contains carbon dioxide (CO2), as well as small amounts of impurities, e.g., hydrogen sulfide (H2S), nitrogen (...

  • Article
  • Open Access
2 Citations
3,780 Views
12 Pages

Giant unilamellar vesicles (GUVs) are membrane models used to study membrane properties. Electroformation is one of the methods used to produce GUVs. During electroformation protocol, dry lipid film is formed. The drying of the lipid film induces the...

  • Article
  • Open Access
6 Citations
3,224 Views
13 Pages

Template-Free Synthesis of High Dehydration Performance CHA Zeolite Membranes with Increased Si/Al Ratio Using SSZ-13 Seeds

  • Jing Du,
  • Jilei Jiang,
  • Zhigang Xue,
  • Yajing Hu,
  • Bo Liu,
  • Rongfei Zhou and
  • Weihong Xing

Pervaporation is an energy-efficient alternative to conventional distillation for water/alcohol separations. In this work, a novel CHA zeolite membrane with an increased Si/Al ratio was synthesized in the absence of organic templates for the first ti...

  • Review
  • Open Access
3 Citations
2,471 Views
15 Pages

In our recent report, we clarified the direct interaction between the excitatory amino acid transporter (EAAT) 1/2 and polyunsaturated fatty acids (PUFAs) by applying electrophysiological and molecular biological techniques to Xenopus oocytes. Xenopu...

  • Article
  • Open Access
4 Citations
2,858 Views
13 Pages

Membrane distillation (MD) is a process driven by the vapor pressure difference dependent on temperature variation, utilizing a hydrophobic porous membrane. MD operates at low pressure and temperature, exhibiting resilience to osmotic pressure. Howev...

  • Article
  • Open Access
2 Citations
2,384 Views
13 Pages

Simultaneous Recording of Remote Domain Dynamics in Membrane Proteins Using the Double-Labeled DXB/DXT Technique

  • Kazuhiro Mio,
  • Tatsunari Ohkubo,
  • Daisuke Sasaki,
  • Mayui Sugiura,
  • Kayoko Kawaguchi,
  • Kazutaka Araki,
  • Keizaburo Taninaka,
  • Masaki Sakaguchi,
  • Shunsuke Nozawa and
  • Tatsuya Arai
  • + 1 author

Protein dynamics play important roles in biological functions, which accompany allosteric structure changes. Diffracted X-ray blinking (DXB) uses monochromatic X-rays and nanocrystal probes. The intramolecular motion of target proteins is analyzed fr...

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Membranes - ISSN 2077-0375