Results 41 to 50 of about 26,556 (257)

Degrees of Sulfonation: Mapping the Reactivity Landscape of Acridine and Acridone

open access: yesOrganics
Although sulfonated acridines and acridones are valuable scaffolds in diagnostics and materials science, to our best knowledge, there is no comprehensive study that addresses how the degree of sulfonation depends on reaction parameters. To fill this gap,
Péter Kisfaludi   +3 more
doaj   +1 more source

THE USE OF CHLOROSULFONIC ACID ON SULFONATION OF cPTFE FILM GRAFTED STYRENE FOR PROTON EXCHANGE MEMBRANE

open access: yesIndonesian Journal of Chemistry, 2010
Sulfonation of g-ray iradiated and styrene-grafted crosslinked polytetrafluoro ethylene film (cPTFE-g-S film) have been done. The aim of the research was to make hydrophyl membrane as proton exchange membrane fuel cell.
Yohan Yohan
doaj   +1 more source

Phosphorus-containing sulfonated polyimides for proton exchange membranes [PDF]

open access: yes, 2008
Synthesis and characterization of the novel sulfonated BAPPO monomer and its use in the synthesis of a new phosphine oxide-based sulfonated polyimide are described. BTDA, 6FDA, and DDS were used as monomers in the polyimide synthesis.
Cornet   +23 more
core   +1 more source

Novel ETFE based radiation grafted poly(styrene sulfonic acid-co-methacrylonitrile) proton conducting membranes with increased stability [PDF]

open access: yes, 2009
Styrene radiation grafted ETFE based proton conducting membranes are subject to degradation under fuel cell operating conditions and show a poor stability. Lifetimes exceeding 250 h can only be achieved with crosslinked membranes.
Alkan Gursel, Selmiye   +7 more
core   +2 more sources

Optimization of Lignin-Based Biocatalyst Production from Pine Sawdust and Wheat Straw

open access: yesMolecules, 2018
Pine sawdust and wheat straw are abundant lignocellulosic wastes that have been recently converted into bioethanol under a biochemical platform scheme whose main waste is lignin. Lignin can be transformed into a wide variety of high added-value products,
Froylán M.E. Escalante   +3 more
doaj   +1 more source

Sulfotransferases in mediating the chlorophenol metabolism: Metabolites identification and metabolic characterization

open access: yesJournal of Hazardous Materials Letters
Chlorophenols (CPs) are persistent organic pollutants (POPs) widely detected in the natural environment. Sulfotransferases are a group of crucial phase II metabolic enzyme involved in the metabolism of endogenous and exogenous substances.
Kai Yang   +7 more
doaj   +1 more source

Effect of dispersion state of Cloisite15A® on the performance of SPEEK/Cloisite15A nanocomposite membrane for DMFC application [PDF]

open access: yes, 2011
The introduction of 2,4,6-triaminopyrimidine (TAP) into sulfonated poly(ether ether ketone) (SPEEK)/Cloisite15A® nanocomposite membranes were investigated for the purpose of maintaining low methanol permeability and suppressing swelling in direct ...
Ismail, Ahmad Fauzi   +2 more
core   +1 more source

Benzhydryl phenyl sulfone [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2009
In the title compound, C(19)H(16)O(2)S, the sulfur-bound phenyl group is approximately parallel to one of the two phenyl rings of the benzhydryl group, making a dihedral angle of 12.53 (10)°, and forms a dihedral angle of 41.25 (9)° with the other phenyl ring. In the crystal, weak C-H⋯O inter-actions form a two-dimensional network propagating along the
Peter Mayer   +2 more
openaire   +3 more sources

Homopolymer self-assembly of poly(propylene sulfone) hydrogels via dynamic noncovalent sulfone–sulfone bonding [PDF]

open access: yesNature Communications, 2020
Abstract Natural biomolecules such as peptides and DNA can dynamically self-organize into diverse hierarchical structures. Mimicry of this homopolymer self-assembly using synthetic systems has remained limited but would be advantageous for the design of adaptive bio/nanomaterials.
Fanfan Du   +9 more
openaire   +3 more sources

Tetes Tebu Menjadi Katalis Untuk Proses Pembuatan Biodiesel

open access: yesJurnal Serambi Engineering, 2023
Sugar cane is a plant that is processed into crystal sugar because it contains high sugar content. Sugar production produces waste, one of which is molasses waste.
Raysha Amelya   +2 more
doaj   +1 more source

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