scholarly journals Effect of the Enantiomeric Ratio of Eutectics on the Results and Products of the Reactions Proceeding with the Participation of Enantiomers and Enantiomeric Mixtures

Chemistry ◽  
2020 ◽  
Vol 2 (3) ◽  
pp. 787-795
Author(s):  
Emese Pálovics ◽  
Dorottya Fruzsina Bánhegyi ◽  
Elemér Fogassy
Keyword(s):  
Charge Distribution ◽  
Eutectic Composition ◽  
The Self ◽  
Combined Effect ◽  
Chiral Molecule ◽  
Racemic Compound ◽  
Enantiomeric Ratio

This perspective is focused on the main parameters determining the results of crystallization of enantiomers or enantiomeric mixtures. It was shown that the ratio of supramolecular and helical associations depends on the eutectic composition of the corresponding enantiomeric mixture. The M and P ratios together with the self-disproportionation (SDE) of enantiomers define the reaction of the racemic compound with the resolving agent. Eventually, each chiral molecule reacts with at least two conformers with different degrees of M and P helicity. The combined effect of the configuration, charge distribution, constituent atoms, bonds, flexibility, and asymmetry of the molecules influencing their behavior was also summarized.

scholarly journals Prediction of the efficiency of diastereoisomer separation on the basis of the behaviour of enantiomeric mixtures

RSC Advances ◽  
2014 ◽  
Vol 4 (41) ◽  
pp. 21254-21261 ◽  
Author(s):  
Emese Pálovics ◽  
Zsolt Szeleczky ◽  
Balázs Fődi ◽  
Ferenc Faigl ◽  
Elemér Fogassy
Keyword(s):  
Eutectic Composition ◽  
Racemic Compound ◽  
Dominant Effect

The composition of a crystalline diastereoisomer (eeDIA) is determined either by the eutectic composition of the racemic compound (eeEuRac) or that of resolving agent (eeEuRes) and the higher ee value has the more dominant effect.

scholarly journals Self-Exchange Velocities in Molten (Li, Na, K)CI of the Eutectic Composition Reflecting the Chemia Effect for the internal [Mobilities

1989 ◽  
Vol 44 (11) ◽  
pp. 1131-1136 ◽  
Author(s):  
Akira Endoh ◽  
Isao Okada
Keyword(s):  
Molecular Dynamics ◽  
Md Simulation ◽  
Eutectic Composition ◽  
Pair Potential ◽  
The Self ◽  
Softness Parameter ◽  
Potential Parameters

Molecular dynamics (MD) simulation has been performed on molten (Li, Na, K)Cl of nearly the eutectic composition at 773 K, 873 K and 973 K. The employed pair potential parameters are based on the Tosi-Fumi ones except the softness parameter, which is somewhat modified. The self-exchange velocities (SEV’s) of Li+ , Na+ and K+ with reference to CP have been calculated. The sequence of the internal mobilities of these cations is well reproduced by the corresponding SEV’s, v; that is VLi < Vk < VNa at 773 K, VLi < VNa ≅ VK at 873 K and VLi < VNa < VK at 973 K

Leak Width of a Cusp-Confined Plasma

1982 ◽  
Vol 37 (8) ◽  
pp. 780-784
Author(s):  
G. Knorr ◽  
D. Willis
Keyword(s):  
Steady State ◽  
Charge Distribution ◽  
Geometric Mean ◽  
The Self ◽  
Magnetic Mirror ◽  
Plasma Stream ◽  
Experimental Measurements ◽  
State Calculation ◽  
Self Consistent

The theoretical and numerical steady-state calculation of the width of an escaping plasma stream through a magnetic mirror solves the self-consistent potential and charge distribution for a low beta plasma. The leak width is obtained as the geometric mean of the ion and electron Lar-mor radius, also called hybrid width, in agreement with some experimental measurements. If the out-streaming plasma is unstable or collisional, the leak width can only larger, contrary to earlier results in the literature

scholarly journals A Combined Effect of Self and Reward: Relationship of Self- and Reward-Bias on Associative Learning

2021 ◽  
Vol 12 ◽  
Author(s):  
Lingyun Wang ◽  
Yuxin Qi ◽  
Lihong Li ◽  
Fanli Jia
Keyword(s):  
Associative Learning ◽  
The Self ◽  
Combined Effect ◽  
Perceptual Processing ◽  
Complex Relationship ◽  
Learning Paradigm ◽  
Self Bias ◽  
High Reward ◽  
Reward Bias ◽  
Relationship Of

Previous studies have demonstrated that individuals process information related to themselves or a high reward quickly and have referred to this as self-bias or reward-bias. However, no previous study has presented self- and reward-bias simultaneously. The present study investigated perceptual processing using the associated learning paradigm when both self and reward were prioritized (condition of double salience) as well as when only self or reward was prioritized (condition of single salience). The present study established these two conditions by manipulating self-relevance (self vs. stranger in Experiment 1; self vs. friend in Experiment 2). The results showed that (1) when the self was pitted against a stranger and received a high or low reward, perceptual processing of the participants mainly involved self-bias (Experiment 1); (2) when the self was pitted against a friend, perceptual processing involved both self-bias and reward-bias (Experiment 2). The study revealed a complex relationship between self- and reward-bias, which depends on the degree of affinity between oneself and others.

Nanocomposite TiC-TiB2 Powders by SHS through Metastability Approach

2006 ◽  
Vol 45 ◽  
pp. 1005-1010 ◽  
Author(s):  
Dario Vallauri ◽  
Y. López ◽  
Bruno DeBenedetti ◽  
Ignazio Amato
Keyword(s):  
High Temperature ◽  
Thermal Treatment ◽  
Eutectic Composition ◽  
Morphological Evolution ◽  
The Self ◽  
Sodium Borate ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Reaction Stoichiometry ◽  
Nanocomposite Powders

The aim of this work is the achievement of nanostructured TiC–TiB2 powders through a metastability approach based on the Self–propagating High–temperature Synthesis (SHS) process followed by quench to obtain highly metastable powder agglomerates. An optimisation of the reaction stoichiometry was carried out in order to obtain products with approximately eutectic composition (i.e. 67%mol TiC – 33%mol TiB2). An optimized amount of sodium borate was used as gasifying additive to produce dispersed nanostructured powder agglomerates. The metastability of the nanocomposite powders obtained through the (SHS+quench) route was evaluated by annealing. The morphological evolution of the powders after thermal treatment yielded a recrystallisation with limited grain growth of the nanostructured TiC–TiB2 phases and demonstrated the metastability of the products obtained by the (SHS+quench) route.

Wine for the Table: Self-Construal, Group Size, and Choice for Self and Others

2018 ◽  
Vol 46 (3) ◽  
pp. 508-527 ◽  
Author(s):  
Eugenia C Wu ◽  
Sarah G Moore ◽  
Gavan J Fitzsimons
Keyword(s):  
Group Size ◽  
The Self ◽  
Combined Effect ◽  
Consumption Choices ◽  
Self Construal ◽  
Differential Attention ◽  
Mediation And Moderation

Abstract This research examines how consumers make unilateral decisions on behalf of the self and multiple others, in situations where the chosen option will be shared and consumed jointly by the group—for instance, choosing wine for the table. Results across six studies using three different choice contexts (wine, books, and movies) demonstrate that such choices are shaped by the decision-maker’s self-construal (independent vs. interdependent) and by the size of the group being chosen for (large vs. small). Specifically, we find that interdependent consumers consistently make choices that balance self and others’ preferences, regardless of group size. In contrast, the choices of independent consumers differ depending on group size: for smaller groups, independents make choices that balance self and others’ preferences, while for larger groups, they make choices that more strongly reflect their own preferences. Via mediation and moderation, the data show that differential attention to others underlies the combined effect of self-construal and group size on the joint consumption choices that consumers make for the self and others.

scholarly journals Eutectic Composition of a Chiral Mixture Containing a Racemic Compound

2007 ◽  
Vol 11 (2) ◽  
pp. 293-293
Author(s):  
Yaling Wang ◽  
Rosario LoBrutto ◽  
Robert W. Wenslow ◽  
Ivan Santos
Keyword(s):  
Eutectic Composition ◽  
Racemic Compound

Transfer of the self energy into field energy of density E2/8π during assembly of a localized charge distribution from infinity

2002 ◽  
Vol 80 (10) ◽  
pp. 1133-1144 ◽  
Author(s):  
R F Favreau
Keyword(s):  
Charge Distribution ◽  
Electrostatic Charge ◽  
Physical Significance ◽  
Point Of View ◽  
The Self ◽  
Field Energy ◽  
Self Energy ◽  
A Charge ◽  
Work Done ◽  
Maxwell Stresses

Purcell proposes that the potential energy U of a localized distribution of electrostatic charge has physical significance only as the total energy of the whole configuration. Feynman, on the other hand, favors the idea that U be localized as field energy of density E2/8π however, he points out that the demonstration of E2/8π as localized energy remains ambiguous. The article shows that by calculating the work done by the Maxwell stresses during assembly from infinity of a charge distribution of density q(r), it may be demonstrated unambiguously how the Maxwell stresses create a flow of work that distributes U into localized field energy of density E2/8π. This result supports the Feynman point of view. PACS No.: 03.50De

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