Results 71 to 80 of about 17,729 (255)

Autonomous Hydrogel Actuators Programmed by Endogenous Biochemical Logic for Dual‐Stage Morphing and Drug Release

Advanced Materials, EarlyView.
A 3D‐printed BSA–PEGDA bilayer actuator performs biochemical logic, bending autonomously in acid and releasing its drug payload only when both acid and pepsin are present. This dual‐stage, enzyme‐gated mechanism enables autonomous catch‐and‐release motion and controlled gastric drug delivery, representing a programmable soft material powered by ...
Yuchen Liu, Harischandra Potthuri, Alejandro Sosnik, Luai R. Khoury   +3 more
wiley   +1 more source

Insights into the Structures of Bilirubin and Biliverdin from Vibrational and Electronic Circular Dichroism: History and Perspectives

Molecules, 2023
In this work we review research activities on a few of the most relevant structural aspects of bilirubin (BR) and biliverdin (BV). Special attention is paid to the exocyclic C=C bonds being in mostly Z rather than E configurations, and to the overall ...
Giovanna Longhi, Simone Ghidinelli, Sergio Abbate, Giuseppe Mazzeo, Marco Fusè, Stefan E. Boiadjiev, David A. Lightner   +6 more
doaj   +1 more source

Wavelength dependent photoelectron circular dichroism of limonene studied by femtosecond multiphoton laser ionization and electron-ion coincidence imaging [PDF]

, 2016
Enantiomers of the monoterpene limonene have been investigated by (2+1) resonance enhanced multiphoton ionization and photoelectron circular dichroism employing tuneable, circularly polarized femtosecond laser pulses.
Janssen, Maurice M. H., Powis, Ivan, Rafiee Fanood, Mohammad M.   +2 more
core   +2 more sources

Unlocking Two‐Photon Chiral Signatures in DNA‐Stabilized Silver Nanoclusters: Two‐Photon Circular Dichroism and Circularly Polarized Luminescence

Advanced Optical Materials, EarlyView.
Chiroptical properties of DNA‐stabilized silver nanocluster (DNA)2​[Ag16​Cl2​]8+ are presented in linear and nonlinear regime. These water‐soluble, NIR‐emitting nanoprobes demonstrate exceptionally high two‐photon circular dichroism and circularly polarized luminescence brightness.
Karolina Sulowska, Rweetuparna Guha, Stacy M. Copp, Joanna Olesiak‐Bańska   +3 more
wiley   +1 more source

Polarization spectroscopy methods in the determination of interactions of small molecules with nucleic acids – tutorial

Beilstein Journal of Organic Chemistry, 2018
The structural characterization of non-covalent complexes between nucleic acids and small molecules (ligands) is of a paramount significance to bioorganic research.
Tamara Šmidlehner, Ivo Piantanida, Gennaro Pescitelli   +2 more
doaj   +1 more source

Chiral Metal Surfaces and Nanoparticles

CHIMIA, 2008
The surface of metals can exhibit intrinsic chiral structure. Furthermore, chirality can be bestowed onto achiral metal surfaces by adsorption of chiral molecules.
Cyrille Gautier, Thomas Bürgi
doaj   +1 more source

Chiral Phase Transfer Catalysis in the Asymmetric Synthesis of a 3,3-Disubstituted Isoindolinone and Determination of Its Absolute Configuration by VCD Spectroscopy

Molecules, 2020
In this work we report our endeavors toward the development of an asymmetric synthesis of a 3,3-disubstituted isoindolinone, dimethyl 2-(1-methyl-3-oxoisoindolin-1-yl)malonate, via asymmetric cascade reaction of 2-acetylbenzonitrile with dimethylmalonate
Guglielmo Monaco, Maximilian Tiffner, Antonia Di Mola, Wouter Herrebout, Mario Waser, Antonio Massa   +5 more
doaj   +1 more source

Catalyst‐Free Collagen Filament Crosslinking for Engineering Anisotropic and Mechanically Robust Tissue Scaffolds

Advanced Science, EarlyView.
A bioorthogonal rhodamine/PEG crosslinking strategy is introduced to engineer dense collagen hydrogels with high mechanical resilience and cytocompatibility. Integration with wet‐spinning enables the fabrication of uniaxially aligned, cell‐laden collagen filaments that activate mechanotransductive signaling and support functional muscle regeneration in
JuYeon Kim, Hanjun Hwangbo, ByungJoon Choi, Dogeon Yoon, GeunHyung Kim   +4 more
wiley   +1 more source

Characterization of Eight Novel Spiroleptosphols from Fusarium avenaceum

Molecules, 2019
Chemical analyses of Fusarium avenaceum grown on banana medium resulted in eight novel spiroleptosphols, T1, T2 and U−Z (1−8). The structures were elucidated by a combination of high-resolution mass spectrometric data and 1- and 2-D NMR ...
Klaus Ringsborg Westphal, Manuela Ilse Helga Werner, Katrine Amalie Hamborg Nielsen, Jens Laurids Sørensen, Valery Andrushchenko, Jacob Winde, Morten Hertz, Mikkel Astrup Jensen, Mathilde Lauge Mortensen, Petr Bouř, Teis Esben Sondergaard, Reinhard Wimmer   +11 more
doaj   +1 more source

Cryo‐EM Structures Reveal the Molecular Basis of Asymmetric Allosteric Activation by MMOB in the Hydroxylase of Soluble Methane Monooxygenase

Advanced Science, EarlyView.
Cryo‐EM analysis reveals an asymmetric MMOH–MMOB complex with distinct protomers, where MMOB binding triggers structural rearrangements from the surface to the active site. This conformational asymmetry shortens the Fe···Fe distance to 2.7 Å in one protomer, forming a geometry suitable for O2 activation and supporting a sequential catalytic mechanism ...
Yunha Hwang, Bumhan Ryu, Soyeon Park, Dong‐Heon Lee, Hyo Jin Hong, Jeong‐Geol Na, Chul Gyu Song, Hyun Goo Kang, Edwin Pozharski, Seung Jae Lee   +9 more
wiley   +1 more source