Results 61 to 70 of about 2,547,452 (302)

Atomistic simulations of reactive processes from gas to condensed phase [PDF]

, 2014
In this thesis, we use advance computational methods to explore molecular reaction dynamics in gas and condensed phase. The molecular reactions that we describe in here have been studied for the last 25 years, using computational methods, from ...
Yosa, Juvenal
core   +1 more source

Simulation of cosmic dust spectra

The Astrophysical Journal, 1986
Several possible analogs of cosmic dust have been produced by a variety of techniques. Extinction and emission spectra of these grain samples reveal that hydrated silicates, in particular those which are Mg-rich, produce infrared spectra that bear strong resemblances to the spectra of a variety of astronomical dust grains ranging from those found ...
J. H. Hecht, R. W. Russell, P. R. Grieve, J. R. Stephens   +3 more
openaire   +1 more source

Do We Know How to Model Reionization?

The Open Journal of Astrophysics
I compare the power spectra of the radiation fields from two recent sets of fully-coupled simulations that model cosmic reionization: "Cosmic Reionization On Computers" (CROC) and "Thesan".
Nickolay Y. Gnedin
doaj   +1 more source

Recent insights into the molecular mechanism of ubiquinol oxidation by cytochrome bc1

FEBS Open Bio, EarlyView.
The review reflects on the mechanism of the catalytic reaction in cytochrome bc1: the electron bifurcation that involves the separation of two electrons derived from the quinol oxidation to opposite sides of the enzyme across the membrane. This review summarizes the long‐standing effort to understand the mechanism of quinol oxidation catalyzed by ...
Anna Wójcik‐Augustyn, Artur Osyczka, Marcin Sarewicz   +2 more
wiley   +1 more source

First Calculations of Starspot Spectra Based on 3D Radiative Magnetohydrodynamics Simulations

The Astrophysical Journal Letters
Accurate calculations of starspot spectra are essential for multiple applications in astronomy. The current standard is to represent starspot spectra by spectra of stars that are cooler than the quiet star regions.
H. N. Smitha, Alexander I. Shapiro, Veronika Witzke, Nadiia M. Kostogryz, Yvonne C. Unruh, Tanayveer S. Bhatia, Robert Cameron, Sara Seager, Sami K. Solanki   +8 more
doaj   +1 more source

Neurochemical Endpoints to Inform Early‐Stage Trials of Spinocerebellar Ataxia 2 and 3 in a Multisite Setting

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neurochemical levels measured by brain MR spectroscopy (MRS) have been proposed as endpoints for clinical trials in early‐stage spinocerebellar ataxia (SCA) trials. We tested their trial‐readiness by quantifying neurochemicals in three affected brain regions in early‐stage cohorts of SCA2 and SCA3, examining their reproducibility in ...
James M. Joers, Yaqiao Wei, Dinesh K. Deelchand, Adam Berrington, Young Woo Park, Guita Banan, Michal Povazan, Jens T. Rosenberg, André J. W. van der Kouwe, Tetsuo Ashizawa, Khalaf O. Bushara, Chiadi U. Onyike, Sub H. Subramony, Jeremy D. Schmahmann, Brian J. Soher, Peter B. Barker, Thomas H. Mareci, Eva‐Maria Ratai, Lynn E. Eberly, Gülin Öz   +19 more
wiley   +1 more source

Observed Steep and Shallow Spectra, Narrow and Broadband Spectra, Multifrequency Simultaneous Spectra, and Statistical Fringe Spectra in Fast Radio Bursts: Various Faces of Intrinsic Quasi-periodic Spectra?

The Astrophysical Journal
Through analysis, modelings, and simulations, we show that if the spectra of fast radio bursts (FRBs) are intrinsically quasi-periodic, and likely produced by coherent curvature radiation from quasi-periodic structured bunches, then the observed steep ...
Shu-Qing Zhong, Wen-Jin Xie, Jia-Hong Gu
doaj   +1 more source

Measurement of neutron energy spectra for Eg=23.1 and 26.6 MeV mono-energetic photon induced reaction on natC using laser electron photon beam at NewSUBARU

EPJ Web of Conferences, 2017
Photo-neutron energy spectra for Eg=23.1 and 26.6 MeV mono-energetic photons on natC were measured using laser Compton scattering facility at NewSUBARU BL01.
Itoga Toshiro, Nakashima Hiroshi, Sanami Toshiya, Namito Yoshihito, Kirihara Yoichi, Miyamoto Shuji, Takemoto Akinori, Yamaguchi Masashi, Asano Yoshihiro   +8 more
doaj   +1 more source

T1 Over Squared Proton Density Ratio to Characterize Multiple Sclerosis Lesions

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Differentiating remyelinated from demyelinated lesions in MS remains challenging without histological confirmation. This study introduces the T1‐to‐PD2 ratio (TPR) imaging approach and evaluates its ability to characterize MS lesions alongside other quantitative MRI (qMRI) metrics. Methods Thirty individuals with MS (mean age: 47.5 ± 
Sarah J. Wright, Scotty G. McKay, Jean Ramos Bou, Fen Bao, Vivian B. Truong, Chenyang Li, Li Jiang, Anza B. Memon, E. Mark Haacke, Yulin Ge, Yongsheng Chen   +10 more
wiley   +1 more source

Stokes diagnostics of simulations of magnetoconvection of mixed-polarity quiet-Sun regions [PDF]

, 2005
Realistic solar magneto-convection simulations including the photospheric layers are used to study the polarization of the Fe I Zeeman-sensitive spectral lines at 6301.5, 6302.5, 15 648 and 15 652 Å.
Shelyag, S., S. K. Solanki, Vögler, Alexander, Solanki, S., E. V. Khomenko, Vögler, A., Khomenko, Elena, Solanki, S. K., Shelyag, Sergiy, Solanki, Sami K., Khomenko, E. V., A. Vögler, S. Shelyag, Khomenko, E.   +13 more
core   +1 more source