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Journal articles on the topic 'Cell membrane stability'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Chasis, J. A., and N. Mohandas. "Erythrocyte membrane deformability and stability: two distinct membrane properties that are independently regulated by skeletal protein associations." Journal of Cell Biology 103, no. 2 (1986): 343–50. http://dx.doi.org/10.1083/jcb.103.2.343.

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Skeletal proteins play an important role in determining erythrocyte membrane biophysical properties. To study whether membrane deformability and stability are regulated by the same or different skeletal protein interactions, we measured these two properties, by means of ektacytometry, in biochemically perturbed normal membranes and in membranes from individuals with known erythrocyte abnormalities. Treatment with 2,3-diphosphoglycerate resulted in membranes with decreased deformability and decreased stability, whereas treatment with diamide produced decreased deformability but increased stabil

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2

Kink, Julian, Martin Ise, Michel Suermann, Boris Bensmann, Philipp Junker, and Richard Hanke-Rauschenbach. "Mechanical Stability of Membranes in PEMWE." ECS Meeting Abstracts MA2024-02, no. 43 (2024): 2953. https://doi.org/10.1149/ma2024-02432953mtgabs.

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This study investigates the structural mechanics of membranes in proton exchange membrane water electrolysis (PEMWE) cells, with a particular focus on mechanical stressors and the resultant membrane deformation. Membrane defects such as cracks, pinholes, and thinning can occur due to mechanical stressors. Structural mechanical simulations can predict the membrane behaviour under stress if the boundary conditions are set accurately and the material models are chosen to fit experimental data. This presentation describes such model-based investigations and is divided into three parts. It begins w

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3

Sari, Diah Indah Kumala, Tristiana Erawati, Andang Miatmoko, Cita Rosita Sigit Prakoeswa, and Widji Soeratri. "Characterization and Stability Study of Amniotic Membrane Stem Cell Metabolite Product (AMSC-MP)." International Journal of Pharma Research and Health Sciences 8, no. 1 (2020): 3126–30. http://dx.doi.org/10.21276/ijprhs.2020.01.02.

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4

Bandurska, Hanna, and Halina Gniazdowska-Skoczek. "Cell membrane stability in two barley genotypes under water stress conditions." Acta Societatis Botanicorum Poloniae 64, no. 1 (2014): 29–32. http://dx.doi.org/10.5586/asbp.1995.005.

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The effect of water stress induced in vitro by polyethylene glycol 6000 (PEG) and under drought stress on cell membrane stability was examined in two barley genotypes, the cultivar Aramir and line R567. The injury of cell membranes was markely influenced by leaf age, leaf position on the stem, and the degree of drought stress. The differences in percentage of injury to cell membrane between these genotypes were also found. The cv. Aramir exhibited a lower percentage injury value as compared to line R567, measured in vitro by PEG test. Similarly, under drought stress the cv. Aramir showed highe

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Messmann, R., S. Gannon, S. Sarnaik, and RM Johnson. "Mechanical properties of sickle cell membranes." Blood 75, no. 8 (1990): 1711–17. http://dx.doi.org/10.1182/blood.v75.8.1711.1711.

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Abstract The mechanical properties of sickle erythrocyte membranes were evaluated in the ektacytometer. When ghosts from the total red blood cell population were examined, the rigidity of the resealed ghosts and their rate of fragmentation by shear stress (t1/2) were normal. However, fractionation on Stractan density gradients revealed that sickle cells were heterogenous in their membrane mechanical properties. The ghosts from dense cell fractions exhibited both increased rigidity and decreased stability. Presumably, these altered mechanical properties are a reflection of the well-documented b

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Messmann, R., S. Gannon, S. Sarnaik, and RM Johnson. "Mechanical properties of sickle cell membranes." Blood 75, no. 8 (1990): 1711–17. http://dx.doi.org/10.1182/blood.v75.8.1711.bloodjournal7581711.

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The mechanical properties of sickle erythrocyte membranes were evaluated in the ektacytometer. When ghosts from the total red blood cell population were examined, the rigidity of the resealed ghosts and their rate of fragmentation by shear stress (t1/2) were normal. However, fractionation on Stractan density gradients revealed that sickle cells were heterogenous in their membrane mechanical properties. The ghosts from dense cell fractions exhibited both increased rigidity and decreased stability. Presumably, these altered mechanical properties are a reflection of the well-documented biochemica

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7

Park, Heemin, Youngkwang Kim, Yu Seung Kim, and Chulsung Bae. "Phosphoric Acid-Doped Ion-Pair High-Temperature Proton Exchange Membranes Based on Polyphenylene Copolymer." ECS Meeting Abstracts MA2024-02, no. 43 (2024): 2932. https://doi.org/10.1149/ma2024-02432932mtgabs.

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High-temperature proton exchange membrane fuel cell (HT-PEMFC) using hydrogen fuel has multiple advantages, such as faster reaction kinetics, high impurity tolerance to the catalyst, and simple water and thermal management than low-temperature proton exchange membrane fuel cell (LT-PEMFC). Polybenzimidazole (PBI) based phosphoric acid (PA)-doped membranes are the most common membrane for HT-PEMFC, because they have excellent chemical and thermal stability, and provide relatively usable conductivity for HT-PEMFCs. However, the PBI-based PA-doped membranes still suffer from reduction in conducti

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8

Toda, Shota, Artin Fattah, Kenta Asawa, et al. "Optimization of Islet Microencapsulation with Thin Polymer Membranes for Long-Term Stability." Micromachines 10, no. 11 (2019): 755. http://dx.doi.org/10.3390/mi10110755.

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Microencapsulation of islets can protect against immune reactions from the host immune system after transplantation. However, sufficient numbers of islets cannot be transplanted due to the increase of the size and total volume. Therefore, thin and stable polymer membranes are required for the microencapsulation. Here, we undertook the cell microencapsulation using poly(ethylene glycol)-conjugated phospholipid (PEG-lipid) and layer-by-layer membrane of multiple-arm PEG. In order to examine the membrane stability, we used different molecular weights of 4-arm PEG (10k, 20k and 40k)-Mal to examine

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9

Manohar, Murli, and Dukjoon Kim. "Synergistic Effect of 2-Acrylamido-2-methyl-1-propanesulfonic Acid on the Enhanced Conductivity for Fuel Cell at Low Temperature." Membranes 10, no. 12 (2020): 426. http://dx.doi.org/10.3390/membranes10120426.

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This present work focused on the aromatic polymer (poly (1,4-phenylene ether-ether-sulfone); SPEES) interconnected/ cross-linked with the aliphatic monomer (2-acrylamido-2-methyl-1-propanesulfonic; AMPS) with the sulfonic group to enhance the conductivity and make it flexible with aliphatic chain of AMPS. Surprisingly, it produced higher conductivity than that of other reported work after the chemical stability was measured. It allows optimizing the synthesis of polymer electrolyte membranes with tailor-made combinations of conductivity and stability. Membrane structure is characterized by 1H

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10

Wijaya, Farid, Seunghee Woo, Suyeon Kim, et al. "Sulfonated Polyphenylene-Based Multiblock Membranes with Fluorine Moiety for Fuel Cell Applications." International Journal of Energy Research 2023 (June 19, 2023): 1–13. http://dx.doi.org/10.1155/2023/5562126.

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Sulfonated poly(phenylene-co-arylene ether sulfone) multiblock copolymers are synthesized via Colon’s nickel-mediated cross-coupling reaction and are investigated as a proton-exchange membrane fuel cell. To investigate the influence of the fluorine moieties on the membrane properties, two different membranes are prepared, one containing a fluorinated hydrophobic poly(arylene ether) block (6F polymer membrane) and a nonfluorinated biphenyl (BP) polymer membrane. The proton transport, morphology, mechanical properties, and oxidative stabilities of the membranes are examined in relation to the io

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11

Khan, Muhammad Imran, Abdallah Shanableh, Shabnam Shahida, Mushtaq Hussain Lashari, Suryyia Manzoor, and Javier Fernandez. "SPEEK and SPPO Blended Membranes for Proton Exchange Membrane Fuel Cells." Membranes 12, no. 3 (2022): 263. http://dx.doi.org/10.3390/membranes12030263.

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In fuel cell applications, the proton exchange membrane (PEM) is the major component where the balance among dimensional stability, proton conductivity, and durability is a long-term trail. In this research, a series of blended SPEEK/SPPO membranes were designed by varying the amounts of sulfonated poly(ether ether ketone) (SPEEK) into sulfonated poly(phenylene) oxide (SPPO) for fuel cell application. Fourier transform infrared spectroscopy (FTIR) was used to confirm the successful synthesis of the blended membranes. Morphological features of the fabricated membranes were characterized by usin

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Yandrasits, Michael. "Present and Future Perspectives on Fuel Cell Membrane Chemical Stability." ECS Meeting Abstracts MA2023-02, no. 43 (2023): 2167. http://dx.doi.org/10.1149/ma2023-02432167mtgabs.

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Durability is key to the value proposition of proton exchange membrane (PEM) fuel cells for transportation applications. Ultimately, fuel cell vehicles need to match the lifetimes of diesel powered trucks, and last longer than lithium batteries, for widespread adoption[1]. The burden of reaching these aggressive targets falls on all components of the system, stack, and membrane electrode assembly. Of these, membrane durability remains an important area of research, in particular the chemical stability of the ionomer. The recognition of the ‘simple unzipping’ of the perfluorosulfonic acid (PFSA

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13

Cheng, Geng, Zhen Li, Shan Ren, et al. "A Robust Composite Proton Exchange Membrane of Sulfonated Poly (Fluorenyl Ether Ketone) with an Electrospun Polyimide Mat for Direct Methanol Fuel Cells Application." Polymers 13, no. 4 (2021): 523. http://dx.doi.org/10.3390/polym13040523.

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As a key component of direct methanol fuel cells, proton exchange membranes with suitable thickness and robust mechanical properties have attracted increasing attention. On the one hand, a thinner membrane gives a lower internal resistance, which contributes highly to the overall electrochemical performance of the cell, on the other hand, strong mechanical strength is required for the application of proton exchange membranes. In this work, a sulfonated poly (fluorenyl ether ketone) (SPFEK)-impregnated polyimide nanofiber mat composite membrane (PI@SPFEK) was fabricated. The new composite membr

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14

Coster, Hans G. L. "Self-assembly, Stability and the Electrical Characteristics of Cell Membranes." Australian Journal of Physics 52, no. 1 (1999): 117. http://dx.doi.org/10.1071/p98088.

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Living cells are enveloped in an ultra thin ( ~ 6 nm) membrane which consists basically of a bi-molecular film of lipid molecules in which are embedded functional proteins that perform a variety of functions, including energy transduction, signalling, transport of ions (and other molecules) etc., and also acts as a diffusion barrier between the cell interior (cytoplasm) and the external medium. A simple statistical mechanical analysis of the self-assembly of the membrane from its components provides useful insights into the molecular organisation of the membrane and its electrical properties.

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15

Schrier, SL, E. Rachmilewitz, and N. Mohandas. "Cellular and membrane properties of alpha and beta thalassemic erythrocytes are different: implication for differences in clinical manifestations." Blood 74, no. 6 (1989): 2194–202. http://dx.doi.org/10.1182/blood.v74.6.2194.2194.

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Abstract To define how excess unpaired alpha- and beta-globin chains in severe beta-thalassemia and severe alpha-thalassemia interacting with the membrane might alter cellular and membrane properties, we performed a series of biophysical and biochemical analyses on erythrocytes obtained from affected patients. Detailed analysis of cellular and membrane deformability characteristics showed that both forms of thalassemic erythrocytes have excess surface area in relation to cell volume and increased membrane dynamic rigidity. The deformability characteristics of thalassemic erythrocytes in hypert

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16

Schrier, SL, E. Rachmilewitz, and N. Mohandas. "Cellular and membrane properties of alpha and beta thalassemic erythrocytes are different: implication for differences in clinical manifestations." Blood 74, no. 6 (1989): 2194–202. http://dx.doi.org/10.1182/blood.v74.6.2194.bloodjournal7462194.

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To define how excess unpaired alpha- and beta-globin chains in severe beta-thalassemia and severe alpha-thalassemia interacting with the membrane might alter cellular and membrane properties, we performed a series of biophysical and biochemical analyses on erythrocytes obtained from affected patients. Detailed analysis of cellular and membrane deformability characteristics showed that both forms of thalassemic erythrocytes have excess surface area in relation to cell volume and increased membrane dynamic rigidity. The deformability characteristics of thalassemic erythrocytes in hypertonic medi

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17

Ahmed, Saad, Tasleem Arshad, Amir Zada, et al. "Preparation and Characterization of a Novel Sulfonated Titanium Oxide Incorporated Chitosan Nanocomposite Membranes for Fuel Cell Application." Membranes 11, no. 6 (2021): 450. http://dx.doi.org/10.3390/membranes11060450.

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In this study, nano-TiO2 sulfonated with 1,3-propane sultone (STiO2) was incorporated into the chitosan (CS) matrix for the preparation of CS/STiO2 nanocomposite membranes for fuel cell applications. The grafting of sulfonic acid (–SO3H) groups was confirmed by Fourier transform infrared spectroscopy, thermogravimetric analysis and energy-dispersive X-ray spectroscopy. The physicochemical properties of these prepared membranes, such as water uptake, swelling ratio, thermal and mechanical stability, ion exchange capacity and proton conductivity, were determined. The proton conducting groups on

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18

Tsehaye, Misgina, Xian Yang, Tobias Janoschka, et al. "Study of Anion Exchange Membrane Properties Incorporating N-spirocyclic Quaternary Ammonium Cations and Aqueous Organic Redox Flow Battery Performance." Membranes 11, no. 5 (2021): 367. http://dx.doi.org/10.3390/membranes11050367.

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Flexible cross-linked anion exchange membranes (AEMs) based on poly (p-phenylene oxide) grafted with N-spirocyclic quaternary ammonium cations were synthesized via UV-induced free-radical polymerization by using diallylpiperidinium chloride as an ionic monomer. Five membranes with ion exchange capacity (IEC) varying between 1.5 to 2.8 mmol Cl−·g−1 polymer were obtained and the correlation between IEC, water uptake, state of water in the membrane and ionic conductivity was studied. In the second part of this study, the influence of properties of four of these membranes on cell cycling stability

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19

Jheng, Li-Cheng, Cheng-Wei Cheng, Ko-Shan Ho, et al. "Dimethylimidazolium-Functionalized Polybenzimidazole and Its Organic–Inorganic Hybrid Membranes for Anion Exchange Membrane Fuel Cells." Polymers 13, no. 17 (2021): 2864. http://dx.doi.org/10.3390/polym13172864.

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A quaternized polybenzimidazole (PBI) membrane was synthesized by grafting a dimethylimidazolium end-capped side chain onto PBI. The organic–inorganic hybrid membrane of the quaternized PBI was prepared via a silane-induced crosslinking process with triethoxysilylpropyl dimethylimidazolium chloride. The chemical structure and membrane morphology were characterized using NMR, FTIR, TGA, SEM, EDX, AFM, SAXS, and XPS techniques. Compared with the pristine membrane of dimethylimidazolium-functionalized PBI, its hybrid membrane exhibited a lower swelling ratio, higher mechanical strength, and bette

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20

Xiao, Shuqin, Rong Zeng, Lie Chen, and Yiwang Chen. "Novel proton exchange membranes with dimensional stability and permeability resistance based on sulfonate polynorbornenes." Journal of Polymer Engineering 33, no. 3 (2013): 275–83. http://dx.doi.org/10.1515/polyeng-2012-0026.

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Abstract The novel proton exchange membranes of a direct methanol fuel cell (DMFC), the sulfonated functional polynorbornenes P(BN/NOH/NS), are successfully prepared via the sulfobutylation of poly(butoxymethylenenorbornene-co-norbornenemethanol) [P(BN/NOH)] with 1,4-butane sultone, and a cross-linked composite membrane consisting of P(BN/NOH/NS), P(BN/NOH), 4,5-imidazole dicarboxylic acid (IDA), and H3PO4 has also been developed. Adding the IDA/H3PO4 to the membrane promotes the proton conductivity of the cross-linked composite membrane to 2.79×10-3 S/cm at 80°C, which is six times higher tha

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Shin, Dongwon, Abdul Kodir, Hyejin Lee, and Byungchan Bae. "Additives for Improving Chemical Stability of Polymer Electrolyte Membranes." ECS Meeting Abstracts MA2024-02, no. 43 (2024): 2908. https://doi.org/10.1149/ma2024-02432908mtgabs.

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Polymer electrolyte membrane (PEM) is a key component that affects the performance and durability of various electrochemical devices, including fuel cells and electrolyzers. Despite improvements in PEM performance, durability still needs to be improved. The lifetime of membranes deteriorates under operating conditions due to chemical degradation. This chemical degradation not only reduces electrochemical performance but also its mechanical integrity, ultimately leading to device failure. In recent years, many researches report that durability has been improved by synthesizing chemically stable

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Zaidi, S. M. Javaid. "Advanced Membrane Materials for Fuel Cell Applications." Materials Science Forum 657 (July 2010): 88–115. http://dx.doi.org/10.4028/www.scientific.net/msf.657.88.

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Fuels are being considered an as environmental friendly technology and are making headlines across the globe as clean and reliable alternate energy source for transportation, stationary and portable power applications. The rapid developments taking place in all the leading research laboratories in the world are making fuel cell closer to the realization. The progress of PEM fuel cell is closely related to the development of solid polymer electrolyte membranes as it defines the properties needed for other components of the fuel cell. So far perfluorosulfonated membranes such as Nafion have bee

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Vijayakumar, Vijayalekshmi, and Sang Yong Nam. "A Review of Recent Chitosan Anion Exchange Membranes for Polymer Electrolyte Membrane Fuel Cells." Membranes 12, no. 12 (2022): 1265. http://dx.doi.org/10.3390/membranes12121265.

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Considering the critical energy challenges and the generation of zero-emission anion exchange membrane (AEM) sources, chitosan-based anion exchange membranes have garnered considerable interest in fuel cell applications owing to their various advantages, including their eco-friendly nature, flexibility for structural modification, and improved mechanical, thermal, and chemical stability. The present mini-review highlights the advancements of chitosan-based biodegradable anion exchange membranes for fuel cell applications published between 2015 and 2022. Key points from the rigorous literature

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Hasa, Bjorn. "Tuning the Selectivity of Liquid Products during CO Electroreduction." ECS Meeting Abstracts MA2022-02, no. 50 (2022): 2508. http://dx.doi.org/10.1149/ma2022-02502508mtgabs.

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The electrochemical carbon dioxide reduction (eCO2RR) into value-added chemicals and fuels offers a sustainable route to close the anthropogenic carbon cycle and store the renewable sources' excess energy into chemical bonds. Typically, eCO2RR/eCORR studies employ reactant reduction in the cathode and oxygen evolution reaction in the anode. The membrane (membrane electrode assembly configuration) facilitates the ion transport between the two electrodes and chemically isolate the occurring electrochemical half-reactions. It should be noted that investigators have conceptualized the use of ion-e

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Humelnicu, Andra-Cristina, Petrisor Samoila, Mihai Asandulesa, et al. "Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature." Polymers 12, no. 5 (2020): 1125. http://dx.doi.org/10.3390/polym12051125.

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Chitosan-sulfated titania composite membranes were prepared, characterized, and evaluated for potential application as polymer electrolyte membranes. To improve the chemical stability, the membranes were cross-linked using sulfuric acid, pentasodium triphosphate, and epoxy-terminated polydimethylsiloxane. Differences in membranes’ structure, thickness, morphology, mechanical, and thermal properties prior and after cross-linking reactions were evaluated. Membranes’ water uptake capacities and their chemical stability in Fenton reagent were also studied. As proved by dielectric spectroscopy, the

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Levi, Valeria, Ana M. Villamil Giraldo, Pablo R. Castello, Juan P. F. C. Rossi, and F. Luis González Flecha. "Effects of phosphatidylethanolamine glycation on lipid–protein interactions and membrane protein thermal stability." Biochemical Journal 416, no. 1 (2008): 145–52. http://dx.doi.org/10.1042/bj20080618.

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Non-enzymatic glycation of biomolecules has been implicated in the pathophysiology of aging and diabetes. Among the potential targets for glycation are biological membranes, characterized by a complex organization of lipids and proteins interacting and forming domains of different size and stability. In the present study, we analyse the effects of glycation on the interactions between membrane proteins and lipids. The phospholipid affinity for the transmembrane surface of the PMCA (plasma-membrane Ca2+-ATPase) was determined after incubating the protein or the phospholipids with glucose. Resul

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Tang, Vivian W. "Cell-cell adhesion interface: rise of the lateral membrane." F1000Research 6 (March 15, 2017): 276. http://dx.doi.org/10.12688/f1000research.10680.1.

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The lateral membrane plays an important role in the mechanical stability of epithelial cell sheet in steady state. In addition, the lateral membrane is continuously remodeled during dynamic processes such as cell extrusion, cytokinesis, and intercellular cell movement. In wound healing, the lateral membrane must be built from flat and spread cells that had crawled into the area of the wound. Thus, forming the lateral membrane is a phenomenon that occurs not only in development but also during homeostatic maintenance and regeneration of differentiated epithelial tissues.

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Xu, Guoxiao, Juan Zou, Zhu Guo, et al. "Bi-Functional Composting the Sulfonic Acid Based Proton Exchange Membrane for High Temperature Fuel Cell Application." Polymers 12, no. 5 (2020): 1000. http://dx.doi.org/10.3390/polym12051000.

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Although sulfonic acid (SA)-based proton-exchange membranes (PEMs) dominate fuel cell applications at low temperature, while sulfonation on polymers would strongly decay the mechanical stability limit the applicable at elevated temperatures due to the strong dependence of proton conduction of SA on water. For the purpose of bifunctionally improving mechanical property and high-temperature performance, Nafion membrane, which is a commercial SA-based PEM, is composited with fabricated silica nanofibers with a three-dimensional network structure via electrospinning by considering the excellent wa

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Sukkar, Theresa, and Maria Skyllas-Kazacos. "Membrane stability studies for vanadium redox cell applications." Journal of Applied Electrochemistry 34, no. 2 (2004): 137–45. http://dx.doi.org/10.1023/b:jach.0000009931.83368.dc.

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Yu, Chunsong, Myunggi An, Meng Li, Charles Manke, and Haipeng Liu. "Structure-Dependent Stability of Lipid-Based Polymer Amphiphiles Inserted on Erythrocytes." Membranes 11, no. 8 (2021): 572. http://dx.doi.org/10.3390/membranes11080572.

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Cell-based therapies have the potential to transform the treatment of many diseases. One of the key challenges relating to cell therapies is to modify the cell surface with molecules to modulate cell functions such as targeting, adhesion, migration, and cell–cell interactions, or to deliver drug cargos. Noncovalent insertion of lipid-based amphiphilic molecules on the cell surface is a rapid and nontoxic approach for modifying cells with a variety of bioactive molecules without affecting the cellular functions and viability. A wide variety of lipid amphiphiles, including proteins/peptides, car

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Xia, Zi Jun, Hong Xu, Xiao Xia Guo, and Jian Hua Fang. "Synthesis and Properties of Sulfonated Polyimide/Polybenzimidazole Cross-Linked Membranes for Fuel Cell Applications." Advanced Materials Research 287-290 (July 2011): 2516–21. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.2516.

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A series of cross-linked proton exchange membranes with the ion exchange capacities (IECs) of 0.70 - 1.52 meq/g have been prepared via the reaction of the anhydride-terminated sulfonated polyimide oligomers (SPI-3, SPI-5 and SPI-7, here the figure refers to the averaged block length) and the polybenzimidazole with pendant amino groups (H2N-PBI) in dimethylsulfoxide (DMSO) during the membrane cast process. The prepared cross-linked membranes showed high tensile strength (55 - 80 MPa) and good water stability (> 2 months in deionized water at 100 °C). Fenton’s test revealed that all the cross

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Hameed, Yasir, Mohsen Nabi-Afjadi, Yuan Gu, and Long Wu. "Cell membrane-coated nanoparticles for cancer therapy." Cancer Insight 2, no. 1 (2023): 145–62. http://dx.doi.org/10.58567/ci02010009.

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Despite the advantages of nanoscale drug delivery systems, traditional nanoparticles often encounter challenges such as detection and elimination by the immune system. To circumvent these limitations, scientists have created biomimetic nanoparticles that extend circulation time, decrease clearance rates, and optimize drug delivery. The integration of cell membranes onto nanoparticle surfaces yields Cell Membrane-coated Nanoparticles (CMNPs) that exhibit behavior akin to actual cells while offering superior structural robustness and stability. A variety of cell membranes, including those of red

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REIGADA, RAMON. "MONTE CARLO STUDY OF LIPID NANOSCALE ORGANIZATION IN CELL MEMBRANES: TUNING DOMAIN SIZE AND STABILITY NEAR THE PHASE BOUNDARY." Biophysical Reviews and Letters 04, no. 03 (2009): 245–65. http://dx.doi.org/10.1142/s1793048009001058.

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Lipids in cell membranes are organized in cholesterol-rich domains that are involved in many important cellular functions. Depending on the cell state, such structures are believed to develop covering a wide range of submicrometric sizes and different levels of stability. Using a simple Monte Carlo approach I demonstrate that when the membrane lipid mixture approaches a phase boundary, the cell has several mechanisms to tune both the size and stability of these domains. Cholesterol levels variation, presence of ceramides and insertion of proteins provide plausible mechanisms for the control of

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Yassin, Karam, Igal G. Rasin, Simon Brandon, and Dario R. Dekel. "Which Properties Should Anion-Exchange Membranes Have to Achieve a Longer Fuel Cell Lifetime?" ECS Meeting Abstracts MA2022-02, no. 43 (2022): 1607. http://dx.doi.org/10.1149/ma2022-02431607mtgabs.

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The substantial advancements and availability of new cost-effective materials have drawn significant attention to the technology of anion-exchange membrane fuel cells (AEMFCs). The anion exchange membrane (AEM) is a core component in AEMFCs, essential for conducting hydroxide ions and, more importantly, controlling water transport between the fuel cell electrodes. In this contribution, we apply the computational methodology outlined in Refs. [1,2] to explore the effects of various membrane properties on AEMFC performance and its stability. We specifically consider the following parameters: (A)

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Nijabat, Aneela, Adam Bolton, Muhammad Mahmood-ur-Rehman, et al. "Cell Membrane Stability and Relative Cell Injury in Response to Heat Stress during Early and Late Seedling Stages of Diverse Carrot (Daucus carota L.) Germplasm." HortScience 55, no. 9 (2020): 1446–52. http://dx.doi.org/10.21273/hortsci15058-20.

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Heat waves occur with more regularity and they adversely affect the yield of cool season crops including carrot (Daucus carota L.). Heat stress influences various biochemical and physiological processes including cell membrane permeability. Ion leakage and increase in cell permeability are indicators of cell membrane stability and have been used to evaluate the stress tolerance response in numerous crops and inform plant breeders for improving heat tolerance. No study has been published about the effects of heat stress on cell membrane stability and relative cell injury of carrot. Therefore, t

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Kim, Young Ho, Hyun Kyu Lee, Youn Jin Park, et al. "Preparation of a Styrenesulfonate Grafted MWCNT/Nafion® Nanocomposite Membrane for Direct Methanol Fuel Cell Applications." Advanced Materials Research 347-353 (October 2011): 3685–90. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.3685.

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Styrenesulfonate grafted multi-walled carbon nanotubes (ss-MWCNTs) were prepared by a simple chemical reaction with soduim 4-styrenesulfonate to reinforce Nafion® membranes for use in direct methanol fuel cells (DMFCs). Although Nafion® membranes have excellent proton conductivity for fuel cell applications, methanol crossover through the Nafion® membrane remains a serious problem for DMFC applications. The prepared ss-MWCNTs had approximately 3.30 wt.% of sulfure and showed styrenesulfonate groups on the ss-MWCNTs. Then, the Nafion® membranes were reinforced with ss-MWCNTs to reduce methanol

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Pasquini, Luca, Botagoz Zhakisheva, Emanuela Sgreccia, Riccardo Narducci, Maria Luisa Di Vona, and Philippe Knauth. "Stability of Proton Exchange Membranes in Phosphate Buffer for Enzymatic Fuel Cell Application: Hydration, Conductivity and Mechanical Properties." Polymers 13, no. 3 (2021): 475. http://dx.doi.org/10.3390/polym13030475.

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Proton-conducting ionomers are widespread materials for application in electrochemical energy storage devices. However, their properties depend strongly on operating conditions. In bio-fuel cells with a separator membrane, the swelling behavior as well as the conductivity need to be optimized with regard to the use of buffer solutions for the stability of the enzyme catalyst. This work presents a study of the hydrolytic stability, conductivity and mechanical behavior of different proton exchange membranes based on sulfonated poly(ether ether ketone) (SPEEK) and sulfonated poly(phenyl sulfone)

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Low, PS, BM Willardson, N. Mohandas, M. Rossi, and S. Shohet. "Contribution of the band 3-ankyrin interaction to erythrocyte membrane mechanical stability." Blood 77, no. 7 (1991): 1581–86. http://dx.doi.org/10.1182/blood.v77.7.1581.bloodjournal7771581.

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In an effort to evaluate the role of the band 3-ankyrin linkage in maintenance of red blood cell membrane integrity, solution conditions were sought that would selectively dissociate the band 3-ankyrin linkage, leaving other membrane skeletal interactions intact. For this purpose erythrocytes were equilibrated overnight in nutrient-containing buffers at a range of elevated pHs and then examined for changes in mechanical stability and membrane skeletal composition. Band 3 was found to be released from interaction with the membrane skeleton over a pH range (8.4 to 9.5) that was observed to disso

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Hameed, Yasir, Mohsen Nabi-Afjadi, Yuan Gu, and Long Wu. "Cell membrane-coated nanoparticles for cancer therapy." Cancer Insight 2, no. 2 (2023): 37–48. http://dx.doi.org/10.58567/ci02020007.

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<p style="text-align: justify;">Despite the advantages of nanoscale drug delivery systems, traditional nanoparticles often encounter challenges such as detection and elimination by the immune system. To circumvent these limitations, scientists have created biomimetic nanoparticles that extend circulation time, decrease clearance rates, and optimize drug delivery. The integration of cell membranes onto nanoparticle surfaces yields Cell Membrane-coated Nanoparticles (CMNPs) that exhibit behavior akin to actual cells while offering superior structural robustness and stability. A variety of

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40

Mesarec, Luka, Mitja Drab, Samo Penič, Veronika Kralj-Iglič, and Aleš Iglič. "On the Role of Curved Membrane Nanodomains and Passive and Active Skeleton Forces in the Determination of Cell Shape and Membrane Budding." International Journal of Molecular Sciences 22, no. 5 (2021): 2348. http://dx.doi.org/10.3390/ijms22052348.

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Biological membranes are composed of isotropic and anisotropic curved nanodomains. Anisotropic membrane components, such as Bin/Amphiphysin/Rvs (BAR) superfamily protein domains, could trigger/facilitate the growth of membrane tubular protrusions, while isotropic curved nanodomains may induce undulated (necklace-like) membrane protrusions. We review the role of isotropic and anisotropic membrane nanodomains in stability of tubular and undulated membrane structures generated or stabilized by cyto- or membrane-skeleton. We also describe the theory of spontaneous self-assembly of isotropic curved

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41

Abu-Saied, M. A., Emad Ali Soliman, Khamael M. Abualnaj, and Eman El Desouky. "Highly Conductive Polyelectrolyte Membranes Poly(vinyl alcohol)/Poly(2-acrylamido-2-methyl propane sulfonic acid) (PVA/PAMPS) for Fuel Cell Application." Polymers 13, no. 16 (2021): 2638. http://dx.doi.org/10.3390/polym13162638.

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In this study, chemically cross-linked PVA/PAMPS membranes have been prepared to be used in direct methanol fuel cells (DMFCs). The structural properties of the resultant membrane were characterized by use FTIR and SEM. Additionally, their thermal stability was assessed using TGA. Moreover, the mechanical properties and methanol and water uptake of membrane was studied. The obtained FTIR of PVA/PAMPS membranes revealed a noticeable increase in the intensity of adsorption peaks appearing at 1062 and 1220 cm−1, which correspond to sulfonic groups with the increasing proportion of PAMPS. The ther

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Ma, Liying, Hongxia Song, Xiaofei Gong, et al. "A High-Methanol-Permeation Resistivity Polyamide-Based Proton Exchange Membrane Fabricated via a Hyperbranching Design." Polymers 16, no. 17 (2024): 2480. http://dx.doi.org/10.3390/polym16172480.

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Four non-fluorinated sulfonimide polyamides (s-PAs) were successfully synthesized and a series of membranes were prepared by blending s-PA with polyvinylidene fluoride (PVDF) to achieve high-methanol-permeation resistivity for direct methanol fuel cell (DMFC) applications. Four membranes were fabricated by blending 50 wt% PVDF with s-PA, named BPD-101, BPD-102, BPD-111 and BPD-211, respectively. The s-PA/PVDF membranes exhibit high methanol resistivity, especially for the BPD-111 membrane with methanol resistivity of 8.13 × 10−7 cm2/s, which is one order of magnitude smaller than that of the N

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Choi, Wanjae, Hyunil Ryu, Ahmed Fuwad, et al. "Quantitative Analysis of the Membrane Affinity of Local Anesthetics Using a Model Cell Membrane." Membranes 11, no. 8 (2021): 579. http://dx.doi.org/10.3390/membranes11080579.

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Local anesthesia is a drug that penetrates the nerve cell membrane and binds to the voltage gate sodium channel, inhibiting the membrane potential and neurotransmission. It is mainly used in clinical uses to address the pain of surgical procedures in the local area. Local anesthetics (LAs), however, can be incorporated into the membrane, reducing the thermal stability of the membrane as well as altering membrane properties such as fluidity, permeability, and lipid packing order. The effects of LAs on the membrane are not yet fully understood, despite a number of previous studies. In particular

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Li, Xiang, Tengling Ye, Xuan Meng, et al. "Advances in the Application of Sulfonated Poly(Ether Ether Ketone) (SPEEK) and Its Organic Composite Membranes for Proton Exchange Membrane Fuel Cells (PEMFCs)." Polymers 16, no. 19 (2024): 2840. http://dx.doi.org/10.3390/polym16192840.

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This review discusses the progress of research on sulfonated poly(ether ether ketone) (SPEEK) and its composite membranes in proton exchange membrane fuel cells (PEMFCs). SPEEK is a promising material for replacing traditional perfluorosulfonic acid membranes due to its excellent thermal stability, mechanical property, and tunable proton conductivity. By adjusting the degree of sulfonation (DS) of SPEEK, the hydrophilicity and proton conductivity of the membrane can be controlled, while also balancing its mechanical, thermal, and chemical stability. Researchers have developed various composite

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Kim, Je-Deok. "High-Temperature Water Electrolysis Properties of Membrane Electrode Assemblies with Nafion and Crosslinked Sulfonated Polyphenylsulfone Membranes by Using a Decal Method." Membranes 14, no. 8 (2024): 173. http://dx.doi.org/10.3390/membranes14080173.

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To improve the stability of high-temperature water electrolysis, I prepared membrane electrode assemblies (MEAs) using a decal method and investigated their water electrolysis properties. Nafion 115 and crosslinked sulfonated polyphenylsulfone (CSPPSU) membranes were used. IrO2 was used as the oxygen evolution reaction (OER) catalyst, and Pt/C was used as the hydrogen evolution reaction (HER) catalyst. The conductivity of the CSPPSU membrane at 80 °C and 90% RH (relative humidity) is about four times lower than that of the Nafion 115 membrane. Single-cell water electrolysis was performed while

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Qu, Erli, Min Xiao, Dongmei Han, et al. "A Novel High Temperature Fuel Cell Proton Exchange Membrane with Nanoscale Phase Separation Structure Based on Crosslinked Polybenzimidazole with Poly(vinylbenzyl chloride)." Nanomaterials 13, no. 2 (2023): 266. http://dx.doi.org/10.3390/nano13020266.

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A semi-aromatic polybenzimidazole (DPBI) is synthesized via polycondensation of decanedioic acid (DCDA) and 3,3-diaminobenzidine (DAB) in a mixed phosphorus pentoxide/methanesulfonic acid (PPMA) solvent. Ascribing to in-situ macromolecular crosslinker of ploly((vinylbenzyl chloride) (PVBC), a robust crosslinked DPBI membrane (DPBI-xPVBC, x refers to the weight percentage of PVBC in the membrane) can be obtained. Comprehensive properties of the DPBI and DPBI-xPVBC membranes are investigated, including chemical structure, antioxidant stability, mechanical strength, PA uptake and electrochemical

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47

Sigwadi, Rudzani, Fulufhelo Ṋemavhola, Simon Dhlamini, and Touhani Mokrani. "Mechanical Strength Of Nafion®/ZrO2 Nano-Composite Membrane." International Journal of Manufacturing, Materials, and Mechanical Engineering 8, no. 1 (2018): 54–65. http://dx.doi.org/10.4018/ijmmme.2018010104.

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The mechanical stability of modified membranes has become a priority for fuel cell applications as the membranes must endure all the fuel cell operations (to prevent crossover of the fuel while still conducting). Their mechanical stress and yielding stress in the recast and impregnation methods compared with the commercial Nafion® membrane were observed under tensile tests. The modulus of elasticity of wet commercial Nafion117 membrane, Nafion®/ Zr-0, Nafion®/Zr-50 and Nafion®/ Zr-80 membranes and Nafion®/ Zr-100 nano-composite membrane using impregnation methods in the region between 0 and 0.

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Hyde, Maureen, Laura Block-Alper, Jahaira Felix, Paul Webster, and David I. Meyer. "Induction of secretory pathway components in yeast is associated with increased stability of their mRNA." Journal of Cell Biology 156, no. 6 (2002): 993–1001. http://dx.doi.org/10.1083/jcb.200112008.

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The overexpression of certain membrane proteins is accompanied by a striking proliferation of intracellular membranes. One of the best characterized inducers of membrane proliferation is the 180-kD mammalian ribosome receptor (p180), whose expression in yeast results in increases in levels of mRNAs encoding proteins that function in the secretory pathway, and an elevation in the cell's ability to secrete proteins. In this study we demonstrate that neither the unfolded protein response nor increased transcription accounts for membrane proliferation or the observed increase in secretory pathway

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Rajendran, Raj G. "Polymer Electrolyte Membrane Technology for Fuel Cells." MRS Bulletin 30, no. 8 (2005): 587–90. http://dx.doi.org/10.1557/mrs2005.165.

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AbstractThe concept of using an ion-exchange membrane as an electrolyte separator for polymer electrolyte membrane (PEM) fuel cells was first reported by General Electric in 1955. However, a real breakthrough in PEM fuel cell technology occurred in the mid-1960s after DuPont introduced Nafion®, a perfluorosulfonic acid membrane. Due to their inherent chemical, thermal, and oxidative stability, perfluorosulfonic acid membranes displaced unstable polystyrene sulfonic acid membranes.Today, Nafion® and other related perfluorosulfonic acid membranes are considered to be the state of the art for PEM

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50

Hwang, Seansoo, HyeonGyeong Lee, Yu-Gyeong Jeong, et al. "Polymer Electrolyte Membranes Containing Functionalized Organic/Inorganic Composite for Polymer Electrolyte Membrane Fuel Cell Applications." International Journal of Molecular Sciences 23, no. 22 (2022): 14252. http://dx.doi.org/10.3390/ijms232214252.

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To mitigate the dependence on fossil fuels and the associated global warming issues, numerous studies have focused on the development of eco-friendly energy conversion devices such as polymer electrolyte membrane fuel cells (PEMFCs) that directly convert chemical energy into electrical energy. As one of the key components in PEMFCs, polymer electrolyte membranes (PEMs) should have high proton conductivity and outstanding physicochemical stability during operation. Although the perfluorinated sulfonic acid (PFSA)-based PEMs and some of the hydrocarbon-based PEMs composed of rationally designed

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