Bond Strain and Rotation Behaviors of Anharmonic Thermal Carriers in ‐RDX

2019 ◽  
Vol 45 (2) ◽  
pp. 169-176
Author(s):  
Gaurav Kumar ◽  
Francis G. VanGessel ◽  
Peter W. Chung
Keyword(s):  
Bond Strain

scholarly journals The reaction-limited kinetics of membrane-to-surface adhesion and detachment

1988 ◽  
Vol 234 (1274) ◽  
pp. 55-83 ◽  
Keyword(s):  
Steady State ◽  
Adhesion Molecules ◽  
Numerical Solutions ◽  
Biological Significance ◽  
Elastic Membrane ◽  
Rolling Velocity ◽  
Critical Tension ◽  
Bond Strain ◽  
Kinetics Of ◽  
Catch Bonds

Biological adhesion is frequently mediated by specific membrane proteins (adhesion molecules). Starting with the notion of adhesion molecules, we present a simple model of the physics of membrane-to-surface attach­ment and detachment. This model consists of coupling the equations for deformation of an elastic membrane with equations for the chemical kinetics of the adhesion molecules. We propose a set of constitutive laws relating bond stress to bond strain and also relating the chemical rate constants of the adhesion molecules to bond strain. We derive an exact formula for the critical tension. We also describe a fast and accurate finite difference algorithm for generating numerical solutions of our model. Using this algorithm, we are able to compute the transient behaviour during the initial phases of adhesion and detachment as well as the steady-state geometry of adhesion and the velocity of the contact. An unexpected consequence of our model is the predicted occurrence of states in which adhesion cannot be reversed by application of tension. Such states occur only if the adhesion molecules have certain constitutive properties (catch-bonds). We discuss the rational for such catch-bonds and their possible biological significance. Finally, by analysis of numeri­cal solutions, we derive an accurate and general expression for the steady-state velocity of attachment and detachment. As applications of the theory, we discuss data on the rolling velocity of granulocytes in post-capillary venules and data on lectin-mediated adhesion of red cells.

scholarly journals Intramolecular multi-bond strain: the unrecognized side of the dichotomy of conjugated systems

2016 ◽  
Vol 7 (9) ◽  
pp. 5872-5878 ◽  
Author(s):  
Yirong Mo ◽  
Huaiyu Zhang ◽  
Peifeng Su ◽  
Peter D. Jarowski ◽  
Wei Wu
Keyword(s):  
Model System ◽  
Conjugated Systems ◽  
System P ◽  
Bond Strain ◽  
Linear B

Apart from the more familiar π-conjugation, there is also significant π–π repulsion which is a kind of unrecognized intramolecular strain and can be quantified with the linear B4H2 model system.

Microstuctural Evolution and Substrate Selectivity in Pecvd μc-Si

1992 ◽  
Vol 283 ◽  
Author(s):  
Gregory N. Parsons ◽  
John J. Boland ◽  
James C. Tsang
Keyword(s):  
Hydrogen Plasma ◽  
Chemical Vapor ◽  
Process Conditions ◽  
Microcrystalline Silicon ◽  
Selective Area ◽  
Initial Nucleation ◽  
Bond Strain ◽  
Manufacturing Applications ◽  
Kinetics Of ◽  
Area Deposition

ABSTRACTWe discuss a process for selective area deposition of microcrystalline silicon (μc-Si) using plasma enhanced chemical vapor deposition at low substrate temperature (<300°C) using time modulated silane flow in a hydrogen plasma. We discuss selectivity and deposition rate on a variety of substrates with process conditions important for manufacturing applications, and show a distinct microstructural evolution in the initial nucleation layers using Raman spectroscopy that correlates with the transition from selective to non-selective growth. Atomic hydrogen discriminates between different degrees of bond strain in the nucleii formed on different substrates, and can increase the crystallinity fraction in films deposited at low temperatures by modifying the kinetics of bulk-like bond formation.

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