Results 51 to 60 of about 2,534,122 (299)

Identifying and characterising a plant GH1 β‐glucosidase that exhibits hydrolytic activity on N‐linked glucopyranoside

FEBS Open Bio, EarlyView.
We report the first β‐glucosidase with demonstrated hydrolytic activity on an N‐linked glycopyranoside. The enzyme, native to maize, was biochemically characterised for this novel reaction, and structural modelling of the enzyme–substrate complex revealed several clues to the underlying reduced catalytic rate relative to its native O‐glycopyranoside ...
Hani Gharabli, Carlotta Chiesa, Maher Abou Hachem, Ditte Hededam Welner   +3 more
wiley   +1 more source

Ionomer Membranes Produced from Hexaarylbenzene-Based Partially Fluorinated Poly(arylene ether) Blends for Proton Exchange Membrane Fuel Cells

Membranes, 2022
In this study, a series of high molecular weight ionomers of hexaarylbenzene- and fluorene-based poly(arylene ether)s were synthesized conveniently through condensation and post-sulfonation modification.
Tzu-Sheng Huang, Hsin-Yi Wen, Yi-Yin Chen, Po-Hao Hung, Tung-Li Hsieh, Wen-Yao Huang, Mei-Ying Chang   +6 more
doaj   +1 more source

Simultaneously Promoting Proton Conductivity and Mechanical Stability of SPEEK Membrane by Incorporating Porous g–C₃N₄

Membranes
Proton exchange membranes are widely used in environmentally friendly applications such as fuel cells and electrochemical hydrogen compression. In these applications, an ideal proton exchange membrane should have both excellent proton conductivity and ...
Xiaoyao Wang, Benbing Shi
doaj   +1 more source

Preparation of Sulfonated Polyarylene Ether Membranes Reinforced with Sulfonated Graphene Oxide as Proton Exchange Membranes in Polymer Electrolyte Fuel Cells [PDF]

Journal of Advanced Materials in Engineering
Introduction and Objectives: This study aimed to develop nanocomposite membranes based on sulfonated poly(arylene ether) (sPAE) and evaluate the effect of incorporating sulfonated graphene oxide (sGO) nanosheets on their physicochemical and ...
Maryam Oroujzadeh, Maryam Jalili Marand
doaj   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

FEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty, Kelsi R. Hall, Zachary D. Tillett, Liam S. Turk, James S. Davies, Michael J. Currie, Hamish G. Brown, Sepideh Valimehr, Peter D. Mace, Andrew E. Whitten, Santosh Panjikar, Eric Hanssen, Rachel A. North, Renwick C.J. Dobson   +13 more
wiley   +1 more source

Effects of Concentration of Organically Modified Nanoclay on Properties of Sulfonated Poly(vinyl alcohol) Nanocomposite Membranes

International Journal of Electrochemistry, 2011
Electrolyte nanocomposite membranes for proton exchange membrane fuel cells and direct methanol fuel cells were prepared by carrying out a sulfonation of poly(vinyl alcohol) with sulfosuccinic acid and adding a type of organically modified ...
Apiradee Sanglimsuwan, Narumon Seeponkai, Jatuphorn Wootthikanokkhan   +2 more
doaj   +1 more source

Effect of reduced graphene oxide (rGO) in chitosan/Pahae natural zeolite-based polymer electrolyte membranes for direct methanol fuel cell (DMFC) applications

Materials Science for Energy Technologies, 2023
The use of electrolyte membranes for fuel cell applications has grown rapidly, and one of the materials often developed is chitosan. In this study, polymer electrolyte membranes were successfully produced using chitosan and Pahae natural zeolite with the
Yuan Alfinsyah Sihombing, Susilawati, Siti Utari Rahayu, Masnita Desy Situmeang   +3 more
doaj   +1 more source

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

FEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey, Miriam Livier Llamas‐García, Gabriela M. Montero‐Morán, Leticia Santos, Samuel Lara‐González   +4 more
wiley   +1 more source

Development of Bacterial Cellulose Membrane from Sulfation SCOBY Kombucha for Polymer Electrolyte Membrane Fuel Cell (PEMFC) Applications

Jurnal Kimia Sains dan Aplikasi
Electrolyte membranes are critical components in determining the performance of PEMFC systems. The use of commercial membranes remains constrained by high production costs, thereby necessitating the development of biomaterial-based alternatives ...
Sauli Safitri, Khairuddin Khairuddin, Ni Ketut Sumarni   +2 more
doaj   +1 more source

Preparation and Proton Exchange Properties of GO Grafting modified Cross-linked Membranes

International Journal of Electrochemical Science, 2018
The cross-linked membranes were prepared with DS 68% SPEEK and epoxy resin. Sulfonated graphite oxide was grafted into SPEEK main bonds to study the sulfonic acid groups on the impact of proton exchange properties. Using solartron electrochemical testing
Zhengping Zhao, Chenyu Pan, Guojun Jiang, Mingqiang Zhong, Benhua Fei   +4 more
doaj   +1 more source