Results 91 to 100 of about 791,939 (337)

Advances in Measurements of Electron Density and Effective Atomic Number Using Dual-energy Computed Tomography

CT Lilun yu yingyong yanjiu
Accurate measurements of electron density and effective atomic number are essential for precise imaging diagnosis and dose estimation in the multiparametric functional analysis of dual-energy computed tomography (CT).
Xinliang LU, Yunfu LIU, Yongxian ZHANG, Dandan LIU, Yantao NIU   +4 more
doaj   +1 more source

Calculated-Experimental Model for Multilayer Shield

ARO-The Scientific Journal of Koya University, 2016
The effective linear attenuation coefficients and build-up factors for single shield of Al, Fe, Pb, and for multi-layer shield of Al-Pb, Al-Fe, Fe-Pb, Al-Fe-Pb as a function of shield thickness, atomic number, and order of the materials composing the ...
Maan S. Al-Arif, Diyaree O. Kakil
doaj   +1 more source

Effective Atomic Numbers of Glass Samples

International Journal of Computational and Experimental Science and Engineering
Effective atomic numbers are a term used to understand the interaction of a compound or material with radiation. In particular, this term is often used for materials with complex structures that can be expressed by a single fixed atomic number. If different elements in a material are present in different concentrations, the effective atomic number of ...
openaire   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

First detection of bromine and antimony in hot stars

, 2018
Bromine (atomic number Z=35) and antimony (Z=51) are extremely difficult to detect in stars. In very few instances, weak and mostly uncertain identifications of Br I, Br II, and Sb II in relatively cool, chemically peculiar stars were successful. Adopted
Knoerzer, M., Kruk, J. W., Rauch, T., Werner, K.   +3 more
core   +1 more source

Multiple ETS family transcription factors bind mutant p53 via distinct interaction regions

FEBS Letters, EarlyView.
Mutant p53 gain‐of‐function is thought to be mediated by interaction with other transcription factors. We identify multiple ETS transcription factors that can bind mutant p53 and found that this interaction can be promoted by a PXXPP motif. ETS proteins that strongly bound mutant p53 were upregulated in ovarian cancer compared to ETS proteins that ...
Stephanie A. Metcalf, Nicholas F. Downing, Kaitlyn M. Mills, Samuel C. Metcalfe, Alexander E. Kritzer, Lindsey D. Mayo, Peter C. Hollenhorst   +6 more
wiley   +1 more source

Mimicking a Squeezed Bath Interaction: Quantum Reservoir Engineering with Atoms [PDF]

, 1997
The interaction of an atomic two-level system and a squeezed vacuum leads to interesting novel effects in atomic dynamics, including line narrowing in resonance fluorescence and absorption spectra, and a suppressed (enhanced) decay of the in-phase and ...
A. S. Parkins, A. S. Parkins, A. S. Parkins, A. S. Parkins, A. S. Parkins, C. Cohen-Tannoudji, C. H. Keitel, C. W. Gardiner, G. Yeoman, H. J. Carmichael, H. J. Carmichael, H. Ritsch, H. Ritsch, H. Ritsch, H.-R. Xia, J. F. Poyatos, J. Gea-Banacloche, J. Grochmalicki, J. I. Cirac, J. Javanainen, M. J. Collett, M. R. Ferguson, M. Wilkens, N. Lütkenhaus, N. P. Georgiades, P. Marte, P. Zoller, Q. A. Turchette, R. Dum, S. Swain, S.-Y. Zhu, V. Buzek, Y. Benaryeh   +32 more
core   +2 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Sub-Poissonian statistics of Rydberg-interacting dark-state polaritons

, 2013
Interfacing light and matter at the quantum level is at the heart of modern atomic and optical physics and enables new quantum technologies involving the manipulation of single photons and atoms. A prototypical atom-light interface is electromagnetically
Evers, Jörg, Gärttner, Martin, Günter, Georg, Hofmann, Christoph S., Robert-de-Saint-Vincent, Martin, Schempp, Hanna, Weidemüller, Matthias, Whitlock, Shannon   +7 more
core   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source