Search results for "interaction [electron p]"

Reversed Phase Liquid Chromatography

2015

Relations entre les variations climatiques, les perturbations du cycle du carbone et les crises de la production carbonatée : application au Crétacé …

2011

The Early Cretaceous is punctuated by carbon cycle perturbations, associated with organic matter burial episodes and carbonate production crises. These events coincide with short-term cooling (<1Ma), yet the mechanisms are still unclear, because of low resolution in sea surface temperature reconstructions. Recent climatic models suggest that carbonate-platform-collapse events may trigger a short-term ocean cooling episode (Donnadieu et al., accepted). In order to establish relations between climates and carbonate productions, we performed stratigraphic, palaeoecologic and geochemical analyses on Valanginian sediments from the La Charce-Vergol and the Ollioules sections (South-East France) a…

Kinetics of correlated annealing of radiation defects in alkali halide crystals

1992

Abstract Kinetics of the correlated annealing of pairs of neutral (F-H) Frenkel defects in the KBr crystal is treated theoretically, taking into account defect diffusion, and annihilation at short distances stimulated by an elastic interaction. It is shown that an elastic interaction affects the annealing kinetics and the survival probability of close geminate detects considerably. The widespread description of the correlated annealing in terms of a first-order reaction fails for close defects yielding effective energies which in fact differ essentially from an activation energy of diffusion. Ea, even if it is corrected by an interaction energy. The effect of the initial distribution of def…

Loneliness and interaction ritual theory: failed interaction chains among Finnish university students

2021

This article relates loneliness to interaction ritual theory, understanding loneliness in terms of problematic microinteractional dynamics. The advantage of interaction ritual theory is that it extends our understanding of the issue of the psychologised self and related questions such as how loneliness feels or is experienced. Loneliness is here defined as a response to interaction representing relational understanding of emotions. Interaction ritual theory is interested in the emotional consequences that individuals experience from successful or unsuccessful interaction rituals. Loneliness in this view represents a state in which the individual is denied access to rewarding aspects of inte…

Convergence of density-matrix expansions for nuclear interactions

2010

We extend density-matrix expansions in nuclei to higher orders in derivatives of densities and test their convergence properties. The expansions allow for converting the interaction energies characteristic to finite- and short-range nuclear effective forces into quasi-local density functionals. We also propose a new type of expansion that has excellent convergence properties when benchmarked against the binding energies obtained for the Gogny interaction.

High-performance liquid chromatography of lactose with evaporative light scattering detection, applied to determine fine particle dose of carrier in …

2005

A method for quantification of the fine particle dose of lactose is described, using a hydrophilic interaction chromatography (HILIC) method and evaporative light scattering detection. The HILIC method used an aminopropyl column and a mobile phase consisting of acetonitril/water (80/20, v/v) for isocratic elution. Sensitive chromatography was obtained using a low concentration of water in the extraction solvent. The detection limit (RSD10%) at an injection volume of 10 microL is 10 microg/mL. Linearity was obtained in the range of 10-80 microg/mL (R(2)0.99). A relative standard deviation (RSD) of 0.5% (N=6) demonstrated good precision of the optimized method.

Bio-metal-organic frameworks for molecular recognition and sorbent extraction of hydrophilic vitamins followed by their determination using HPLC-UV

2020

A bio-metal-organic framework (bio-MOF) derived from the amino acid L-serine has been prepared in bulk form and evaluated as sorbent for the molecular recognition and extraction of B-vitamins. The functional pores of bio-MOF exhibit high amounts of hydroxyl groups jointly directing other supramolecular host-guest interactions thus providing the recognition of B-vitamins in fruit juices and energy drinks. Single-crystal X-ray diffraction studies reveal the specific B-vitamin binding sites and the existence of multiple hydrogen bonds between these target molecules and the framework. It offered unique snapshots to accomplish an efficient capture of these solutes in complex aqueous matrices. Fo…

Essay on the integration of interactions in the treatment effect evaluation : the contribution of spatial econometrics methods

2015

This thesis focuses on the integration of interactions in the estimation of the public policy’s effect. Indeed, the estimation standard methods usually rely on strong assumptions that exclude partially or completely the interaction effect both in the selection process of beneficiaries and in the performance of the policy. However, the validity of these assumptions is questionable, particularly in the context of a non-experimental policy because an individual according as it is the beneficiary or not the policy, is not isolated: he interacts with his neighborhood. Thus, the estimated effect of the policy by traditional methods is likely to be biased (underestimation or overestimation) theref…

Quantum field theory of dilute homogeneous Bose-Fermi mixtures at zero temperature: General formalism and beyond mean-field corrections

2002

We consider a dilute homogeneous mixture of bosons and spin-polarized fermions at zero temperature. We first construct the formal scheme for carrying out systematic perturbation theory in terms of single particle Green's functions. We introduce a new relevant object, the renormalized boson-fermion T-matrix which we determine to second order in the boson-fermion s-wave scattering length. We also discuss how to incorporate the usual boson-boson T-matrix in mean-field approximation to obtain the total ground state properties of the system. The next order term beyond mean-field stems from the boson-fermion interaction and is proportional to $a_{\scriptsize BF}k_{\scriptsize F}$. The total groun…

Clusterization and strong coupled-channels effects in deuteron interaction with $^9$Be nuclei

2019

Angular distributions of protons, deuterons, tritons and alpha particles emitted in the d + alt;supagt;9alt;/supagt;Be reaction at Ealt;subagt;labalt;/subagt;=19.5 and 35.0 MeV have been measured.a#13; The elastic scattering channel is analysed in the framework of both the Optical Model and the Coupled-Channel approach. a#13; The interaction potential of the alt;iagt;dalt;/iagt; + alt;supagt;9alt;/supagt;Be system is calculated in the framework of the Double-Folding model using the α+α+alt;iagt;nalt;/iagt; three-body wave function of the alt;supagt;9alt;/supagt;Be nucleus.a#13; The (alt;iagt;dalt;/iagt;,alt;iagt;palt;/iagt;) and (alt;iagt;dalt;/iagt;,alt;iagt;talt;/iagt;) one-nucleon-transf…