Results 41 to 50 of about 42,140 (265)

Spectral triples for nonarchimedean local fields [PDF]

Rocky Mountain Journal of Mathematics, 2019
Using associated trees, we construct a spectral triple for the C$^*$-algebra of continuous functions on the ring of integers $R$ of a nonarchimedean local field $F$ of characteristic zero, and investigate its properties. Remarkably, the spectrum of the spectral triple operator is closely related to the roots of a $q$-hypergeometric function.
Klimek, Slawomir, Rathnayake, Sumedha, Sakai, Kaoru   +2 more
openaire   +4 more sources

Peak-intensity energy spectra of intense solar energetic electron events measured with Solar Orbiter in 2020–2022

Astronomy & Astrophysics
Context. The energy spectra of energetic particles offer valuable insights into particle acceleration processes. While the commonly observed spectral breaks in solar energetic electron (SEE) spectra could serve as fingerprints of the acceleration process,
Fedeli Annamaria, Dresing Nina, Gieseler Jan, Warmuth Alexander, Schuller Frederic, Gómez-Herrero Raúl, Jebaraj Immanuel Christopher, Espinosa Francisco, Vainio Rami   +8 more
doaj   +1 more source

Mixed pyruvate labeling enables backbone resonance assignment of large proteins using a single experiment

Nature Communications, 2018
Structure determination of large proteins by solution state NMR is challenging due to spectral overlap. Here the authors present a labeling strategy using 2-13C and 3-13C pyruvate as carbon source for E.
Scott A. Robson, Koh Takeuchi, Andras Boeszoermenyi, Paul W. Coote, Abhinav Dubey, Sven Hyberts, Gerhard Wagner, Haribabu Arthanari   +7 more
doaj   +1 more source

Connes–Landi Deformation of Spectral Triples [PDF]

Letters in Mathematical Physics, 2010
We describe a way to deform spectral triples with a 2-torus action and a real deformation parameter, motivated by deformation of manifolds after Connes-Landi. Such deformations are shown to have naturally isomorphic $K$-theoretic invariants independent of the deformation parameter.
openaire   +2 more sources

The spectral localizer for semifinite spectral triples

Proceedings of the American Mathematical Society, 2020
The notion of a spectral localizer is extended to pairings with semifinite spectral triples. By a spectral flow argument, any semifinite index pairing is shown to be equal to the signature of the spectral localizer. As an application, a formula for the weak invariants of topological insulators is derived. This provides a new approach to their numerical
Schulz-Baldes, Hermann, Stoiber, Tom
openaire   +3 more sources

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

A Canonical Trace Associated with Certain Spectral Triples

Symmetry, Integrability and Geometry: Methods and Applications, 2010
In the abstract pseudodifferential setup of Connes and Moscovici, we prove a general formula for the discrepancies of zeta-regularised traces associated with certain spectral triples, and we introduce a canonical trace on operators, whose order lies ...
Sylvie Paycha
doaj   +1 more source

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

Extensions and Degenerations of Spectral Triples [PDF]

Communications in Mathematical Physics, 2008
40 pages. Addedd in ver. 2: Examples for the compacts and the Podle`s sphere plus comments on the relations to matricial quantum metrics. In ver.3 the word "deformations" in the original title has changed to "degenerations" and some illustrative remarks on this aspect are ...
Christensen, Erik, Ivan, Cristina
openaire   +3 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source