Results 71 to 80 of about 464,016 (298)

Dissociation of virtual photons in events with a leading proton at HERA [PDF]

open access: yes, 2004
The ZEUS detector has been used to study dissociation of virtual photons in events with a leading proton, gamma^* p -> X p, in e^+p collisions at HERA.
Abramowicz, H.   +354 more
core   +6 more sources

A Systematic Comparison of Alpha‐Synuclein Seed Amplification Assays for Increasing Reproducibility

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Seed amplification assays (SAAs) enable ultrasensitive detection of misfolded α‐synuclein across biofluids and tissues. Yet, heterogeneity in protocols limits cross‐study comparability and clinical translation. Here, we review α‐synuclein SAA methods and their performance across various biological matrices.
Manuela Amaral‐do‐Nascimento   +3 more
wiley   +1 more source

Anomalous rotational-symmetry breaking in proton arrangement of surface-confined cyclic hydrogen bonds revealed by atomic force spectroscopy

open access: yesNature Communications
In hydrogen-bonded materials and biosystems, microscopic proton ordering, which is strongly influenced by the quantum nature of protons, underpins diverse macroscopic phenomena, including phase transitions, chemical reactions, biomolecular processes and ...
Feng Gao   +12 more
doaj   +1 more source

Dynamic water bridging and proton transfer at a surface carboxylate cluster of photosystem II [PDF]

open access: yes, 2019
Proton-transfer proteins are often exposed to the bulk clusters of carboxylate groups that might bind protons transiently. This raises important questions as to how the carboxylate groups of a protonated cluster interact with each other and with water ...
Bondar, Ana-Nicoleta   +4 more
core   +1 more source

Fluorescence Photoactivation by Intermolecular Proton Transfer [PDF]

open access: yesThe Journal of Physical Chemistry A, 2012
We designed a strategy to activate fluorescence under the influence of optical stimulations based on the intermolecular transfer of protons. Specifically, the illumination of a 2-nitrobenzyl derivative at an activating wavelength is accompanied by the release of hydrogen bromide.
Swaminathan, Subramani   +6 more
openaire   +3 more sources

Advancing Age Modulates Associations Between Cognitive Impairment and Brain Volumes in Early MS

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Cognitive impairment is common in multiple sclerosis (MS), but manifestations following the first demyelinating event are relatively unexplored. We investigated cross‐sectional associations between magnetic resonance imaging (MRI)–derived brain volumes and the presence of cognitive impairment outcomes five years after the first ...
Piriyankan Ananthavarathan   +14 more
wiley   +1 more source

Computational Study of Hydrogen Atom Transfer in the Reaction of Quercetin with Hydroxyl Radical

open access: yesHydrogen
Hydrogen atom transfer (HAT), a concerted charge transfer involving two elementary particles, a proton and an electron, plays a key role in many areas of chemistry and biochemistry.
David Vuzem, Viktor Pilepić
doaj   +1 more source

An absolute polarimeter for high energy protons [PDF]

open access: yes, 2001
A study of the spin asymmetries for polarized elastic proton proton collisions in the electromagnetic hadronic interference (CNI) region of momentum transfer provides a method of self calibration of proton polarization.
B.Z. Kopeliovich   +18 more
core   +2 more sources

Comprehensive Characterization of 98 Chinese Cases of Genetic Creutzfeldt‐Jakob Disease With T188K Mutation

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To characterize the demographic, clinical, and laboratory features of the Chinese patients of genetic Creutzfeldt‐Jakob disease with T188K variant (T188K‐gCJD), the most common subtype of genetic prion diseases (gPrDs) in China. Methods In this nationwide retrospective study, data from 98 genetically confirmed T188K‐gCJD patients ...
Chun‐Jie Li   +11 more
wiley   +1 more source

Dependence of tautomerism on substituent type in o-hydroxy Schiff bases

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2019
Quantum computational methods were used to elucidate the structures of the o-hydroxy Schiff bases with different substituents. It is possible for a Schiff base to have different tautomeric structures depending on intramolecular proton transfer from the ...
Çiğdem Albayrak Kaştaş   +1 more
doaj   +1 more source

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