Results 121 to 130 of about 6,045 (297)

Exploring the Fragmentation of Sodiated Species Involving Covalent‐Bond Cleavages for Metabolite Characterization

open access: yesRapid Communications in Mass Spectrometry, EarlyView.
ABSTRACT Rationale Electrospray (ESI), the most popular desorption/ionization technique used in mass spectrometry‐based metabolomics, generates both protonated and deprotonated molecules, as well as adduct ions, sodium being the most frequent monoatomic cation entering their composition.
Annelaure Damont   +9 more
wiley   +1 more source

Solid-Phase Synthesis of Trisubstituted Bicyclic Guanidines via Cyclization of Reduced N-Acylated Dipeptides

open access: yes, 2016
Solid-Phase Synthesis of Trisubstituted Bicyclic Guanidines via Cyclization of Reduced N-Acylated ...
Adel Nefzi (827946)   +5 more
core   +1 more source

Peptide‐based antibacterial nanoplatforms: Design principles, stimuli‐regulated behaviors, and applications

open access: yesResponsive Materials, EarlyView.
Peptide‐based antibacterial nanoplatforms, encompassing self‐assembled peptides and peptide‐engineered inorganic, polymeric, and lipid nanocarriers, are systematically reviewed. The article highlights design principles and stimuli‐responsive regulation for improving peptide stability, delivery efficiency, and antibacterial performance.
Peng Tan   +8 more
wiley   +1 more source

Synthesis of 2-Amino-4-pyrimidinones from Resin-Bound Guanidines Prepared Using Bis(allyloxycarbonyl)-Protected Triflylguanidine

open access: yes, 2016
We have synthesized novel heterocyclic compounds from resin-bound guanidines. For this purpose, an amine immobilized on a solid support was acylated with protected amino acids.
Murray Goodman (2652340)   +1 more
core   +1 more source

Protic Ionic Liquids in Contrast to Aprotic Analogs: Transport Properties and Electrochemical Reactivity

open access: yesThe Chemical Record, EarlyView.
The transport properties and electrochemical reactivity of protic ionic liquids (ILs) are compared with those of aprotic analogs. Protic ILs are characterized by strong cation–anion hydrogen bonding and labile protons, enabling proton conduction and highlighting their potential as fuel cell electrolytes.
Masayoshi Watanabe, Seiji Tsuzuki
wiley   +1 more source

Peptide‐directed nanovehicles enabling tumor‐selective ROS amplification and antitumor immunity

open access: yesVIEW, EarlyView.
Cancer cells are vulnerable to oxidative stress, yet exploit immune tolerance to escape destruction. In contrast, their metabolic profile is markedly altered to support rapid proliferation, accompanied by elevated production of reactive oxygen species (ROS).
Manuela Calin   +3 more
wiley   +1 more source

2-Benzyl-6-carboxy-5,6,7,8-tetrahydroimidazo[1,2-a]pyrimidin-1-ium 2,2,2-trifluoroacetate

open access: yesMolbank
Cyclic guanidines are valuable scaffolds for the design of compounds acting on GABAergic neurotransmission, owing to their ability to mimic the amino functionality of GABA as bioisosteres.
Francesco Bavo   +3 more
doaj   +1 more source

Modular three-component solid-phase synthesis of unsymmetrical guanidines via resin capture of carbodiimides

open access: yes, 2004
Because of their basicity and hydrogen-bonding properties, guanidines are an important functional group in many biologically active compounds of natural or synthetic origin.
Boguszewski, Paul A.   +2 more
core   +1 more source

Polyaniline as a dual flame retardant and electrostatic dissipative additive in polyethylene nanocomposites

open access: yesJournal of Vinyl and Additive Technology, Volume 31, Issue 2, Page 339-355, March 2025.
Effecft of co‐doping polyaniline with phosphoric acid and phytic acid on the heat release rate of polyethylene. Abstract Polyolefins, such as polyethylene (PE), are highly flammable and electrically insulative, limiting their applicability. The study explored the flame‐retardancy and electrical conductivity of PE/polyaniline (PE/PANI) nanocomposites ...
Akeem Adisa   +4 more
wiley   +1 more source

Functionalized Guanidines for Electro-Optic Materials.

open access: yes, 2004
A family of nonlinear optical chromophores has been synthesized containing novel donor systems based on functionalized guanidines. Chromophores utilizing these donor systems display superior transparency and stability properties.
Robert Snoeberger   +7 more
core   +1 more source

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