Results 61 to 70 of about 7,808 (189)

Degradation of Crystalline Si‐Based Solar Modules With Varying Material Combinations—Part I: Encapsulant Degradation

open access: yesProgress in Photovoltaics: Research and Applications, EarlyView.
This work deals with the degradation of solar modules with varying material combinations under accelerated aging conditions. By in situ moisture measurements and simulations of oxygen ingress, the consumption of stabilizing additives and polymer degradation can be correlated spatially resolved with the penetrating stressors.
Robert Heidrich   +11 more
wiley   +1 more source

Advance in One‐Pot Synthesis of Polymer‐Coated Nanogold: Au(III)–Monomer Redox Reaction Initiates Radical Polymerization and Produces a Potential Nanotag Platform

open access: yesSmall, EarlyView.
Gold nanoparticles are prepared simultaneously with the formation of a polymer, whose growth is initiated by direct interaction of Au(III) with a vinyl‐type monomer. Nanoparticles produce stable, bioorthogonal SERS signal originating from an isonitrile/carbene‐type functionality covalently anchored to the gold surface.
Hana Charvátová   +4 more
wiley   +1 more source

Stability of SG1 nitroxide towards unprotected sugar and lithium salts: a preamble to cellulose modification by nitroxide-mediated graft polymerization

open access: yesBeilstein Journal of Organic Chemistry, 2013
The range of applications of cellulose, a glucose-based polysaccharide, is limited by its inherently poor mechanical properties. The grafting of synthetic polymer chains by, for example, a “grafting from” process may provide the means to broaden the ...
Guillaume Moreira   +6 more
doaj   +1 more source

Characterization of the Pore Environments in Covalent Organic Frameworks by Dynamic Spin Probe Exchange

open access: yesSmall, EarlyView.
Covalent organic frameworks (COFs) with alkyl or triethylene glycol pore linings are probed with water‐dissolved nitroxide radicals using CW EPR spectroscopy. Adsorption affinity, local polarity, and radical concentration inside the pores are quantified, revealing hydrogen bonding, dipolar, and π‐π interactions that govern guest binding, which ...
Sebastian Michler   +5 more
wiley   +1 more source

TEMPO-derived spin labels linked to the nucleobases adenine and cytosine for probing local structural perturbations in DNA by EPR spectroscopy

open access: yesBeilstein Journal of Organic Chemistry, 2015
Three 2´-deoxynucleosides containing semi-flexible spin labels, namely TA, UA and UC, were prepared and incorporated into deoxyoligonucleotides using the phosphoramidite method.
Dnyaneshwar B. Gophane   +1 more
doaj   +1 more source

Carbon‐Modified SnS2/g‐C3N4 S‐Scheme Heterostructure with Enhanced Interfacial Charge Transfer for Efficient Photocatalytic Reduction of Cr(VI) and 4‐Nitrophenol

open access: yesSmall, EarlyView.
The S‐scheme of SnS2‐C/g‐C3N4 heterostructure enables Photocatalytic Cr(VI) and 4‐NP reduction. ABSTRACT Hexavalent chromium (Cr(VI)) and 4‐nitrophenol (4‐NP) are persistent and highly toxic water pollutants that require efficient treatment under mild conditions. In this work, L‐cysteine‐derived carbon‐modified SnS2 (SnS2‐C) was prepared hydrothermally
Dhayanantha Prabu Jaihindh   +8 more
wiley   +1 more source

Unexpected one-pot formation of the 1H-6a,8a-epiminotricyclopenta[a,c,e][8]annulene system from cyclopentanone, ammonia and dimethyl fumarate. Synthesis of highly strained polycyclic nitroxide and EPR study

open access: yesBeilstein Journal of Organic Chemistry, 2019
The unexpected formation of a highly strained polycyclic amine was observed in a one-pot synthesis from cyclopentanone, dimethyl fumarate and ammonium acetate.
Sergey A. Dobrynin   +7 more
doaj   +1 more source

Nitroxide polymer brushes prepared by surface-initiated ARGET ATRP and their selective oxidation performances

open access: yeseXPRESS Polymer Letters, 2014
Polymer brushes with 2,2,6,6-tetramethyl-4-piperidyl methacrylate (TMPM) units, grafted on the cross-linked polystyrene (PS) microspheres, were synthesized via surface-initiated ARGET (activators regenerated by electron transfer) ATRP (atom transfer ...
S. J. Liu   +5 more
doaj   +1 more source

Effects of tempol on renal medullary tissue hypoxia in an ovine model of Gram‐negative septic acute kidney injury

open access: yesExperimental Physiology, EarlyView.
Abstract Renal arterial infusion of tempol (RAT) at the onset of Gram‐negative sepsis can prevent sepsis‐induced medullary tissue hypoxia and acute kidney injury (AKI). However, it is not known whether treatment with tempol at a clinically relevant time point of sepsis is similarly effective. Thus, we examined whether tempol can reverse renal medullary
Rachel Peiris   +10 more
wiley   +1 more source

A Modified Balanced Steady State Free Precession Sequence for Overhauser Magnetic Resonance Imaging

open access: yesMagnetic Resonance in Medicine, Volume 96, Issue 4, Page 1655-1665, October 2026.
ABSTRACT Purpose Low‐ and ultralow‐field magnetic resonance imaging (ULF MRI) have inherently low signal‐to‐noise ratio (SNR) by design. Overhauser dynamic nuclear polarization (ODNP) stands out as an effective solution for continuous signal enhancement.
Kai Buckenmaier   +9 more
wiley   +1 more source

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