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Showing 1 to 12 of 98 entries
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Gut microbiota among children living in areas contaminated by radiation and having the cardiac connective tissue dysplasia syndrome.

Problemy radiatsiinoi medytsyny ta radiobiolohii

Kondrashova VG, Vdovenko VY, Kolpakov IE, Popova AS, Mishchenko LP, Gritsenko TV, Stepanova EI.
PMID: 25536565
Probl Radiac Med Radiobiol. 2014 Sep;19:277-86.

Objective. The study examined the gut (colonic) microbiota in children being domiciled in contaminated zones and suffering the cardiac connective tissue dysplasia syndrome (CCTDS). Materials and methods. The study included 99 children living in contaminated zones. Study subjects were...

Physical Meaning of Virtual Kohn-Sham Orbitals and Orbital Energies: An Ideal Basis for the Description of Molecular Excitations.

Journal of chemical theory and computation

van Meer R, Gritsenko OV, Baerends EJ.
PMID: 26588140
J Chem Theory Comput. 2014 Oct 14;10(10):4432-41. doi: 10.1021/ct500727c. Epub 2014 Sep 30.

In recent years, several benchmark studies on the performance of large sets of functionals in time-dependent density functional theory (TDDFT) calculations of excitation energies have been performed. The tested functionals do not approximate exact Kohn-Sham orbitals and orbital energies...

Excitation energies with linear response density matrix functional theory along the dissociation coordinate of an electron-pair bond in N-electron systems.

The Journal of chemical physics

van Meer R, Gritsenko OV, Baerends EJ.
PMID: 24437859
J Chem Phys. 2014 Jan 14;140(2):024101. doi: 10.1063/1.4852195.

Time dependent density matrix functional theory in its adiabatic linear response formulation delivers exact excitation energies ωα and oscillator strengths fα for two-electron systems if extended to the so-called phase including natural orbital (PINO) theory. The Löwdin-Shull expression for...

A simple natural orbital mechanism of "pure" van der Waals interaction in the lowest excited triplet state of the hydrogen molecule.

The Journal of chemical physics

Gritsenko O, Baerends EJ.
PMID: 16468859
J Chem Phys. 2006 Feb 07;124(5):054115. doi: 10.1063/1.2165183.

A treatment of van der Waals (vdW) interaction by density-matrix functional theory requires a description of this interaction in terms of natural orbitals (NOs) and their occupation numbers. From an analysis of the configuration-interaction (CI) wave function of the...

A density matrix functional with occupation number driven treatment of dynamical and nondynamical correlation.

The Journal of chemical physics

Rohr DR, Pernal K, Gritsenko OV, Baerends EJ.
PMID: 19045245
J Chem Phys. 2008 Oct 28;129(16):164105. doi: 10.1063/1.2998201.

A recently proposed series of corrections to the earliest JK-only functionals has considerably improved the prospects of density matrix functional theory (DMFT). Still, the most advanced of these functionals (correction C3) requires a preselection of the terms in the...

Double excitation effect in non-adiabatic time-dependent density functional theory with an analytic construction of the exchange-correlation kernel in the common energy denominator approximation.

Physical chemistry chemical physics : PCCP

Gritsenko OV, Baerends EJ.
PMID: 19475185
Phys Chem Chem Phys. 2009 Jun 14;11(22):4640-6. doi: 10.1039/b903123e. Epub 2009 Apr 23.

Time-dependent density functional (response) theory (TDDF(R)T) is applied almost exclusively in its adiabatic approximation (ATDDFT), which is restricted to predominantly single electronic excitations and neglects additional roots of the TDDFT eigenvalue problem stemming from the interaction between single and...

Nanostructured organosilicon luminophores and their application in highly efficient plastic scintillators.

Scientific reports

Ponomarenko SA, Surin NM, Borshchev OV, Luponosov YN, Akimov DY, Alexandrov IS, Burenkov AA, Kovalenko AG, Stekhanov VN, Kleymyuk EA, Gritsenko OT, Cherkaev GV, Kechek'yan AS, Serenko OA, Muzafarov AM, Bereiter C.
PMID: 25293808
Sci Rep. 2014 Oct 08;4:6549. doi: 10.1038/srep06549.

Organic luminophores are widely used in various optoelectronic devices, which serve for photonics, nuclear and particle physics, quantum electronics, medical diagnostics and many other fields of science and technology. Improving their spectral-luminescent characteristics for particular technical requirements of the...

Comment on "Kohn-Sham exchange-correlation potentials from second-order reduced density matrices" [J. Chem. Phys. 143, 244116 (2015)].

The Journal of chemical physics

Baerends EJ, Gritsenko O.
PMID: 27448910
J Chem Phys. 2016 Jul 21;145(3):037101. doi: 10.1063/1.4958622.

No abstract available.

Self-consistent approximation to the Kohn-Sham exchange potential.

Physical review. A, Atomic, molecular, and optical physics

Baerends EJ, Gritsenko O, van Leeuwen R, van Lenthe E.
PMID: 9911804
Phys Rev A. 1995 Mar;51(3):1944-1954. doi: 10.1103/physreva.51.1944.

No abstract available.

Self-consistent local-density approximation with model Coulomb pair-correlation functions for electronic systems.

Physical review. A, Atomic, molecular, and optical physics

Alonso JA, Balbás LC, Gritsenko OV, Rubio A.
PMID: 9909133
Phys Rev A. 1993 Mar;47(3):1811-1816. doi: 10.1103/physreva.47.1811.

No abstract available.

Local Enhancement of Dynamic Correlation in Excited States: Fresh Perspective on Ionicity and Development of Correlation Density Functional Approximation Based on the On-Top Pair Density.

The journal of physical chemistry letters

Hapka M, Pernal K, Gritsenko OV.
PMID: 32589027
J Phys Chem Lett. 2020 Aug 06;11(15):5883-5889. doi: 10.1021/acs.jpclett.0c01616. Epub 2020 Jul 13.

We discuss the interplay between the nondynamic and dynamic electron correlation in excited states from the perspective of the suppression of dynamic correlation (SDC) and enhancement of dynamic correlation (EDC) effects. We reveal that there exists a connection between...

Molecular multibond dissociation with small complete active space augmented by correlation density functionals.

The Journal of chemical physics

Hapka M, Pernal K, Gritsenko OV.
PMID: 32486680
J Chem Phys. 2020 May 29;152(20):204118. doi: 10.1063/5.0009253.

Molecular multibond dissociation displays a variety of electron correlation effects posing a challenge for theoretical description. We propose a CASΠ(M)DFT approach, which includes these effects in an efficient way by combining the complete active space self-consistent field method with...

Showing 1 to 12 of 98 entries