نتایج جستجو برای: nuclear chemistry

تعداد نتایج: 343716  

2015
Gabriele Stevanato Joseph T. Hill‐Cousins Pär Håkansson Soumya Singha Roy Lynda J. Brown Richard C. D. Brown Giuseppe Pileio Malcolm H. Levitt

Nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) are supremely important techniques with numerous applications in almost all branches of science. However, until recently, NMR methodology was limited by the time constant T1 for the decay of nuclear spin magnetization through contact with the thermal molecular environment. Long-lived states, which are correlated quantum state...

2008
W. Liu R. J. Fries

We discuss the flavor of leading jet partons as a valuable probe of nuclear matter. We point out that the coupling of jets to nuclear matter naturally leads to an alteration of jet chemistry even at high transverse momentum pT . In particular, quantum chromodynamics (QCD) jets coupling to a chemically equilibrated quark gluon plasma in nuclear collisions will lead to hadron ratios at high trans...

Journal: :Cancer research 1958
H BUSCH J R DAVIS

A number of factors have contributed to the progressively increasing number of studies on nu clear proteins in the last decade. Improved meth ods have become available for the separation of nuclei from cytoplasmic cellular constituents in a structurally recognizable form, at the same time that important advances have been made in the fractionation of nuclear proteins and the analysis of their c...

2008
Volker Koch

This article is an attempt to a pedagogical introduction and review into the elementary concepts of chiral symmetry in nuclear physics. Effective chiral models such as the linear and nonlinear sigma model will be discussed as well as the essential ideas of chiral perturbation theory. Some applications to the physics of ultrarelativistic heavy ion collisions will be presented. This work was supp...

2008
Wolfram Weise

This presentation reviews recent guiding themes 2 in the broad context of nuclear physics, from developments in chiral effective field theory applied to nuclear systems, via the phases and structures of QCD, to matter under extreme conditions in heavy-ion collisions and neutron stars.

2005
D. C. Sigee K. Randerath E. Randerath R. Ekins J. R. Barrio R. D. Vis Y. Liu T. Qu X. Wang F. Parak

Covalent binding of chemicals or their metabolites to DNA is a critical event in the initiation of chemical carcinogenesis. Measurement of covalent DNA adducts in model and human systems has become an important tool in mutation and cancer research. The recently developed , highly sensitive 32P-postlabeling assay of DNA adducts and its applications are critically reviewed. Basic features of assa...

2008
Volker Koch

This article is an attempt to a pedagogical introduction and review into the elementary concepts of chiral symmetry in nuclear physics. Effective chiral models such as the linear and nonlinear sigma model will be discussed as well as the essential ideas of chiral perturbation theory. Some applications to the physics of ultrarelativistic heavy ion collisions will be presented. This work was supp...

Journal: :Journal of the American Chemical Society 2003
Uwe Bergmann Wolfgang Sturhahn Donald E Linn Francis E Jenney Michael W W Adams Kresimir Rupnik Brian J Hales Ercan E Alp Aaron Mayse Stephen P Cramer

Metal-hydrogen bonding is important in chemistry and catalysis, but H atoms are often difficult to observe, especially in metalloproteins. In this work we show that Fe-H interactions can be probed by nuclear resonance vibrational spectroscopy at the 14.4 keV 57Fe nuclear resonance. An important advantage of this method, compared to Raman and IR spectroscopy, is the selectivity for modes that in...

2006
C. Fu G. Chubarian V. Z. Goldberg G. Tabacaru X. D. Tang R. E. Tribble K. Peräjärvi G. V. Rogachev F. Q. Guo D. Lee D. M. Moltz J. Powell B. B. Skorodumov B. A. Brown A. Volya Joseph Cerny

C. Fu, G. Chubarian, V. Z. Goldberg, G. Tabacaru, X. D. Tang, R.E. Tribble, K. Peräjärvi, G. V. Rogachev, F. Q. Guo, 3 D. Lee, D. M. Moltz, J. Powell, B. B. Skorodumov, B. A. Brown, A. Volya, and Joseph Cerny 3 Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkley CA 94720 Physics Department Florida State University, Tallahassee, FL 32306 Department of Chemistry, University o...

Journal: :Physical chemistry chemical physics : PCCP 2013
Néstor F Aguirre Pablo Villarreal Gerardo Delgado-Barrio Alexander O Mitrushchenkov María Pilar de Lara-Castells

The Full-Configuration-Interaction Nuclear-Orbital (FCI-NO) approach [J. Chem. Phys., 2009, 131, 19401], as the implementation of the quantum-chemistry ansatz, is overviewed and applied to (He)N-Cl2(X) clusters (N≤ 4). The ground and excited states of both fermionic (3)He and bosonic (4)He [see also, J. Phys. Chem. Lett., 2012, 2, 2145] clusters are studied. It is shown that the FCI-NO approach...

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