Results 91 to 100 of about 21,611 (258)

Light‐controlled molecular tweezers capture specific amyloid oligomers

Aggregate
Amyloid‐β peptide (Aβ) oligomers, characteristic symptom of Alzheimer's disease (AD), have been identified as the most neurotoxic species and significant contributors to neurodegeneration in AD.
Chengyuan Qian, Jiefang Chen, Cheng Wang, Qiang Wang, Xiaoyong Wang, Xiaohui Wang   +5 more
doaj   +1 more source

Light-Driven Self-Pulsating Hydrogel with a Sliding-Delay Mechanism for Micro-Actuation and Microfluidic Applications

Micromachines
Light-responsive hydrogel-based oscillators typically exhibit small oscillation amplitudes because solvent diffusion is intrinsically slow, and their dependence on external periodic light modulation further results in limited amplitude, poor stability ...
Xingui Zhou, Huailei Peng, Yunlong Qiu, Cong Li   +3 more
doaj   +1 more source

Generation of Light Scattering States in Cholesteric Liquid Crystals by Optically Controlled Boundary Conditions

Crystals, 2013
Circularly polarized light was previously employed to stimulate the reversible and reconfigurable writing of scattering states in cholesteric liquid crystal (CLC) cells constructed with a photosensitive layer.
Timothy J. Bunning, Nelson V. Tabiryan, Timothy J. White, Vincent P. Tondiglia, Rafael S. Hakobyan, Svetlana V. Serak, Jonathan P. Vernon   +6 more
doaj   +1 more source

When Light Challenges Heat: Mechanistic Insights Into a Reaction Competing With Cadogan Cyclisation in Nitro‐Perylenediimides

Chemistry – A European Journal, EarlyView.
Visible‐light irradiation of nitro‐perylenediimide in the presence of triphenylphosphine reveals an unexpected pathway competing with the classical Cadogan cyclization. Mechanistic investigations uncover the rapid and selective formation of bay‐functionalized 1‐iminophosphorane‐12‐hydroxy perylenediimide derivatives.
Manuel Pedrón Laserna, Ilaria Ciofini, Piétrick Hudhomme   +2 more
wiley   +1 more source

Synthesis and characterization of bis(4-amino-2-bromo-6-methoxy)azobenzene derivatives

Beilstein Journal of Organic Chemistry, 2019
Aminoazobenzene derivatives with four ortho substituents with respect to the N–N double bond are a relatively unexplored class of azo compounds that show promise for use as photoswitches in biology.
David Martínez-López, Amirhossein Babalhavaeji, Diego Sampedro, G. Andrew Woolley   +3 more
doaj   +1 more source

Tetrazine Ligation in Living Systems: Beyond Fast Kinetics to Effective Bioorthogonality

Chemistry – A European Journal, EarlyView.
Rapid reaction kinetics (k2) alone do not ensure successful tetrazine ligation in living systems. This review introduces ‘effective orthogonality’—focusing on chemical survival, availability, and encounter—as a practical framework. We highlight how bottlenecks shift from cellular sinks to in vivo delivery limits, offering design strategies for reliable
Junhyeong Yim, Junyoung Park, Youngjun Lee, Jongmin Park   +3 more
wiley   +1 more source

Light‐Induced Anion Translocation to Control Helical Folding in an Artificial Communication System

Chemistry – A European Journal, EarlyView.
Anion‐induced helical folding of an oligomer is controlled indirectly and reversibly by light through anion uptake/release by a photoresponsive receptor. Thus, a light signal is processed into a chemical signal in a communication‐type three‐component supramolecular system.
Indigo M. Bekaert, Suchismita Saha, Julia Villalva, David Villarón, Maxime A. Siegler, Sander J. Wezenberg   +5 more
wiley   +1 more source

STUDIES ON PLANT BILE PIGMENTS. [PDF]

, 1982
The (4 Z, 10 2, 15Ej-2,3-dihydrobilindione 4, along with the fully unsaturated (E, 2, Z)-analogue 8, has been prepared from the corresponding (Z, Z, Z)-isomer by a variation of Falk's method (Falk et ul., 1980).
Cmiel, Edmund, Kufer, Werner, Rüdiger, W., Scheer, Hugo, Schneider, Siegfried, Thümmler, F.   +5 more
core  

The Influence of Nonextensivity on Orientational Ordering in Liquid Crystal Systems with Variable Molecular Shape

, 2005
A generalized model taking into account the photoisomerization influence on the nematic ordering is presented. This generalized theory is used to investigate the effect of the nonextensivity on the concentration dependence of the long-range order ...
Aly, Arimitsu, Arimitsu, Bach, Barbero, Barbero, Beck, Beck, Beguin, Bologna, Curado, Grande, Ichimura, Ichimura, Kayacan, Kayacan, Kayacan, Kayacan, Kayacan, Lavagno, Malacarne, Martire, Onsager, Ozhan Kayacan, Palffy-Muhoray, Plastino, Plastino, Priestley, Tezak, Tezak, Tsallis, Tsallis, Tsallis, Zwanzig   +33 more
core   +1 more source

Dynamic Control of Nucleic Acids Self‐Assembly and Expression Using Photoswitches

Chemistry – A European Journal, EarlyView.
We review here the recent progress made in the design of molecular photoswitches, and highlight their implementation for the dynamic control over nucleic acids self‐assembly and expression. ABSTRACT Synthetic nucleic acids have become readily available and now constitute versatile building blocks in materials science—where they can be used to engineer ...
Noemí Nogal, Hugo Laigle, Maxime Mansy, Sébastien Ulrich, Mathieu Surin   +4 more
wiley   +1 more source