Results 31 to 40 of about 89,593 (382)

Selective recognition of ATP by multivalent nano-assemblies of bisimidazolium amphiphiles through “turn-on” fluorescence response

open access: yesBeilstein Journal of Organic Chemistry, 2020
Bisimidazolium receptors, tagged with chromophoric pyrene at one end and linked to an n-alkyl chain at the other, underwent self-assembly in aqueous media depending on the length of the alkyl segment.
Rakesh Biswas   +3 more
doaj   +1 more source

A prospective randomized half-body study: 308 nm LED light vs. 308 nm excimer laser for localized psoriasis

open access: yesFrontiers in Medicine, 2023
BackgroundPsoriasis is a chronic skin disease affecting approximately 3.2% of the population. The 308 nm light emitting diode (LED) is a novel, portable, and cost-effective light source, may have potential in the treatment of localized psoriasis patients
Yingyuan Yu   +7 more
doaj   +1 more source

Unexpectedly high corneal flap thickness and ectasia after mechanical LASIK

open access: yesRevista Brasileira de Oftalmologia, 2023
LASIK is a refractive surgical procedure in which a corneal flap is created to expose the corneal stromal bed. Preoperative estimation of corneal flap thickness is necessary to calculate the percentage tissue altered in LASIK, an important quantitative ...
José Belucio Neto   +3 more
doaj   +1 more source

Detection of a Target Nucleic Acid by Ligation-Assisted Fluorescence Enhancement of a Peptide Nucleic Acid (PNA) Twin Probe via Disulfide Binding. [PDF]

open access: yesBiopolymers
Target‐induced disulfide ligation of PNA twin probes promotes pyrene excimer formation for nucleic acid detection. ABSTRACT The development of methods for detecting specific nucleic acids is important for early diagnosis and treatment of diseases at the genetic level.
Ouchi Y   +9 more
europepmc   +2 more sources

Non-destructive all-optical readout through photoswitching of intramolecular excimer emission

open access: yes, 2022
We report the first intramolecular excimer photoswitching induced by molecular motion within a dithienylethene (DTE) molecule, without destructive readout.
Marie, Barale   +7 more
core   +1 more source

Pyrene: A Probe to Study Protein Conformation and Conformational Changes

open access: yesMolecules, 2011
The review focuses on the unique spectral features of pyrene that can be utilized to investigate protein structure and conformation. Pyrene is a fluorescent probe that can be attached covalently to protein side chains, such as sulfhydryl groups.
Arti B. Patel   +2 more
doaj   +1 more source

Excimer Intermediates en Route to Long-Lived Charge-Transfer States in Single-Stranded Adenine DNA as Revealed by Nonadiabatic Dynamics

open access: yesJournal of Physical Chemistry Letters, 2020
The ultrafast time evolution of a single-stranded adenine DNA is studied using a hybrid multiscale quantum mechanics/molecular mechanics (QM/MM) scheme coupled to nonadiabatic surface hopping dynamics.
L. Ibele   +4 more
semanticscholar   +1 more source

Monochromatic Excimer Light [308nm] versus Monochromatic Excimer Light [308nm] and 4% Khellin Extract in Treatment of Vitiligo [PDF]

open access: yesInternational Journal of Medical Arts, 2022
Background: Vitiligo is very common skin disease resulting from absence of active melanocytes and characterized by focal regions of depigmention, which may induce great psychological problems for the patients. Many therapies such as topical, systemic and
Nada Abdelqader   +2 more
doaj   +1 more source

Mechanically Activated Luminescence in Polyurethanes Incorporating Calixarene Mechanophores. [PDF]

open access: yesAngew Chem Int Ed Engl
The conformational flexibility of a calix[4]arene is exploited to obtain a reversible mechanoluminophore featuring a pyrene excimer couple at the upper rim. Stretching a linear polyurethane incorporating such mechanophore results in luminescence color change from yellow–green to blue, consistent with a force‐induced conformational motion of the ...
Visieri L   +3 more
europepmc   +3 more sources

Observation of the rare chrysene excimer [PDF]

open access: yes, 2014
Formation of the so far elusive chrysene excimer in solution is achieved by using DNA as a supramolecular scaffold. Oligonucleotides possessing one or two chrysene building blocks have been synthesized.
Probst, Markus   +3 more
core   +1 more source

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