Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Functional contributions

As these expressions correspond to the CC energy derivative, they must give size-extensive results. However, the price we pay is that the energy of a given order requires wave function contributions of the same order. Furthermore, these non linear terms are difficult to evaluate. The quadartic in term in second-order, requires comparable difficulty to the quadratic terms in a CCSD calculation... [Pg.155]

Data for the 2 CHj C H, Reaction Temperature, Partition Function Contributions, Exponential Term, Logarithm of the Equilibrium Constant... [Pg.365]

In the intermediate range where Cla is approaching methyl chloride and LR ft) is changing from 1.0 to 0.0, all terms in the potential function contribute except for Vlr-... [Pg.136]

Ramirez-Latorre J, Yu CR, Qu X, Perin F, Karhn A, Role L (1996) Functional contributions of alpha5 subunit to neuronal acetylchohne receptor channels. Nature 380 347-351 Rasmussen BA, Perry DC (2006) An autoradiographic analysis of [ l]alpha-bungarotoxin binding in rat brain after chronic nicotine exposure. Neurosci Lett 404 9-14 Reuben M, Clarke PB (2000) Nicotine-evoked [ H]5-hydroxytryptamine release from rat striatal synaptosomes. Neuropharmacology 39 290-299... [Pg.204]

From inception to final implementation, robotic projects must involve everyone concerned. In the French project (undertaken at the Ecole National Superieure des Mines de Paris in the early 1980s), the initiative to install the robot was taken by management and was not shared by other parties to the project. TTiis separation of functions contributed significantly to the problems encountered (for example unexpected breakdowns, difficulties with peripheral equipment, staffing problems). Similar results have occurred in projects which were initiated and undertaken by the plant management, without the co-operation of other departments. It is not the competence of a particular function or service which is lacking, hut, rather, their interaction. This is because ... [Pg.167]

These studies are continuing to evaluate the effects of different potential functions, contributions from electrostatic and hydrogen bond attractions, ten erature, etc. The effects of solvents, complexing agents, and adjacent surfaces of crystalline regions will be investigated in due course. [Pg.359]

The reconstruction functionals may be understood as substantially renormalized many-body perturbation expansions. When exact lower RDMs are employed in the functionals, contributions from all orders of perturbation theory are contained in the reconstructed RDMs. As mentioned previously, the reconstruction exactly accounts for configurations in which at least one particle is statistically isolated from the others. Since we know the unconnected p-RDM exactly, all of the error arises from our imprecise knowledge of the connected p-RDM. The connected nature of the connected p-RDM will allow us to estimate the size of its error. For a Hamiltonian with no more than two-particle interactions, the connected p-RDM will have its first nonvanishing term in the (p — 1) order of many-body perturbation theory (MBPT) with a Hartree-Fock reference. This assertion may be understood by noticing that the minimum number of pairwise potentials V required to connectp particles completely is (p — 1). It follows from this that as the number of particles p in the reconstmcted RDM increases, the accuracy of the functional approximation improves. The reconstmction formula in Table I for the 2-RDM is equivalent to the Hartree-Fock approximation since it assumes that the two particles are statistically independent. Correlation corrections first appear in the 3-RDM functional, which with A = 0 is correct through first order of MBPT, and the 4-RDM functional with A = 0 is correct through second order of MBPT. [Pg.178]

ILs functionalization contributes to the development of new reaction media (TS-ILs) with improved properties with respect to molecular solvents and conventional ILs. Unfortunately, although in the last few years several experimental and... [Pg.180]

Covalent At 0.2% this function contributes to polarization with the larger basis. [Pg.45]

We may write the spread-function contribution due to the x-ray source as the following Lorentzian doublet ... [Pg.140]

Verfaillie CM, Hurley R, Zhao RC et al. Pathophysiology of CML do defects in integrin function contribute to the premature circulation and massive expansion of the BCR/ABL positive clone JLab Clin Med 1997 129 584-591. [Pg.145]

Taken together there is some direct proof for a functional contribution of spinal NMDA receptors in the process of induction of hyperalgesia by conditional spinal NR1 knockout animals or spinal NR1 knock-down experiments. While at least indirect evidence suggests a correlation between upregulation of the NMDA receptor activity and nociception, the interpretation of the impact of knocking out NR2 subunits needs further detailed research. [Pg.394]

In this equation it still remains to write out the components of the mass-flux vector (e.g., jkZ) in terms of the appropriate composition (and possibly temperature) gradients, Section 3.5.2. Moreover the dissipation function contributes a lot of terms that must be written out in cylindrical coordinates, Eq. 3.201. [Pg.116]

Complete aromaticity in coumarin (19), isocoumarin (28) and 3H- 2- benzopyran-3-one (206) can only be realized if the O—CO function contributes two electrons to form a 1077-electron system, which would necessarily possess a betaine structure. [Pg.636]

In a quantum chemical calculation on a molecule we may wish to classify the symmetries spanned by our atomic orbitals, and perhaps to symmetry-adapt them. Since simple arguments can usually give us a qualitative MO description of the molecule, we will also be interested to classify the symmetries of the possible MOs. The formal methods required to accomplish these tasks were given in Chapters 1 and 2. That is, by determining the (generally reducible) representation spanned by the atomic basis functions and reducing it, we can identify which atomic basis functions contribute to which symmetries. A similar procedure can be followed for localized molecular orbitals, for example. Finally, if we wish to obtain explicit symmetry-adapted functions, we can apply projection and shift operators. [Pg.109]


See other pages where Functional contributions is mentioned: [Pg.145]    [Pg.146]    [Pg.100]    [Pg.48]    [Pg.330]    [Pg.207]    [Pg.486]    [Pg.121]    [Pg.554]    [Pg.136]    [Pg.148]    [Pg.15]    [Pg.729]    [Pg.923]    [Pg.48]    [Pg.48]    [Pg.498]    [Pg.138]    [Pg.194]    [Pg.782]    [Pg.46]    [Pg.51]    [Pg.9]    [Pg.350]    [Pg.626]    [Pg.730]    [Pg.924]    [Pg.3]    [Pg.127]    [Pg.312]    [Pg.333]    [Pg.417]    [Pg.117]    [Pg.165]    [Pg.463]   
See also in sourсe #XX -- [ Pg.9 ]




SEARCH



Contributing factors at the functional department and work-system levels

Contribution function

Contribution function

Contribution to Functional Change

Covalent contribution to the wave function

Drug-receptor interactions functional group contributions

Functional groups, contributions

Functional groups, contributions thermodynamic properties

Ionic contributions to the wave function

Molecular partition function nuclear contributions

Partition function contributions

Relaxation contributions wave function

The Strengths of Functional Group Contributions to Drug-Receptor Interactions

© 2024 chempedia.info