Devonshire

Lennard-Jones J E and Devonshire A F 1936 Diffraction and seiective adsorption of atoms at crystai surfaces Nature 137 1069... 

I. Denholm, A. L. Devonshire, andD. W. HoUoman, eds.. Resistance 91 Achievements and Developments in CombatingPesticide Resistance, Elsevier Applied Science, London, 1992. 

E. Evaluation of the Cell Partition Function by the Method of Lennard-Jones and Devonshire... 

Lennard-Jones and Devonshire summed the interaction (Eq. 30) over z molecules distributed over the surface of a sphere and so obtained a function w(r) describing the resulting field within the sphere, averaged over all orientations. The precise form of w(r) need not be considered here (cf. ref. 17 or 13), suffice it to say that... 

Detonation pressure may be computed theoretically or measured exptly. Both approaches are beset with formidable obstacles. Theoretical computations depend strongly on the choice of the equation of state (EOS) for the detonation products. Many forms of the EOS have been proposed (see Vol 4, D269—98). So.far none has proved to be unequivocally acceptable. Probably the EOS most commonly, used for pressure calcns are the polytropic EOS (Vol 4, D290-91) and the BKW EOS (Vol 4, D272-74 Ref 1). A modern variant of the Lennard Jones-Devonshire EOS, called JCZ-3, is now gaining some popularity (Refs -11. 14). Since there is uncertainty about the correct form of the detonation product EOS there is obviously uncertainty in the pressures computed via the various types of EOS ... 

In a review of the subject, Ubbelohde [3] points out that there is only a relatively small amount of data available concerning the properties of solids and also of the (product) liquids in the immediate vicinity of the melting point. In an early theory of melting, Lindemann [4] considered that when the amplitude of the vibrational displacements of the atoms of a particular solid increased with temperature to the point of attainment of a particular fraction (possibly 10%) of the lattice spacing, their mutual influences resulted in a loss of stability. The Lennard-Jones—Devonshire [5] theory considers the energy requirement for interchange of lattice constituents between occupation of site and interstitial positions. Subsequent developments of both these models, and, indeed, the numerous contributions in the field, are discussed in Ubbelohde s book [3]. 

There are marked species differences in A-esterase activity. Birds have very low, often undetectable, levels of activity in plasma toward paraoxon, diazoxon, pirimi-phos-methyl oxon, and chlorpyrifos oxon (Brealey et al. 1980, Mackness et al. 1987, Walker et al. 1991 Figure 2.10). Mammals have much higher plasma A-esterase activities to all of these substrates. The toxicological implications of this are discussed in Chapter 10. Some species of insects have no measurable A-esterase activity, even in strains that have resistance to OPs (Mackness et al. 1982, Walker 1994). These include the peach potato aphid (Myzus persicae Devonshire 1991) and the... 

Sources McCaffery (1998), Oppenoorth and Welling (1976), Devonshire (1991), Devonshire and Field (1991). 

Devonshire, A.L. (1991). Role of esterases in resistance of insects to insecticides. In Biochemical Society Transactions 19, 755-759. 

Devonshire, A.L. and Sawicki, R.M. (1979). Insecticide resistant Afyz 5 persicae as an example of evolution by gene duplication London. Nature 280,140-141. 

Devonshire, A.L., Byrne, G.D., and Moores, G.D. et al. (1998). Biochemical and molecular characterisation of insecticide sensitive acetylcholinesterase in resistant insects. In Structure and Function of Cholinesterases and Related Proteins, Doctor, B.P, Quinn, D.M., Rotundo, R.L. and Taylor, P. (Eds.) New York Plenum Press, 491 96. 

Vais H, Atkinson S, Pluteanu F, Goodson SJ, Devonshire AL, Williamson MS, Usherwood PNR (2003) Mutations of the para sodium channel of Drosophila melanogaster identify putative binding sites for pyrethroids. Mol Pharmacol 67 513-522... 

Vais H, Williamson MS, Goodson SJ, Devonshire AL, Warmke JW, Usherwood PN, Cohen CJ (2000) Activation of drosophila sodium channels promotes modification by deltamethrin. Reductions in affinity caused by knock-down resistance mutations. J Gen Physiol 115 305-318... 

Fur die Berechnung des Detonationsdruckes, sowie der Geschwindig-keit der ebenen Detonationswelle nach der - Chapman-Jouget Theo-rie, wurden wahrend der letzten funfzig Jahre hauptsachlich die Becker-Kistiakowsky-Wilson (BKW)-, die Lennard-Jones-Devonshire (LJD)- und die Jacobs-Cowperthwaite-Zwisler (JCZ)-Zustandsglei-chung verwendet. 

When we consider a van der Waals system, we can start with the pair interaction as shown in Figure 2.2. The equation giving the pair potential is the 6-12 or Lennard-Jones-Devonshire equation ... 

Figure 2.2 Illustrative plot of the Lennard-Jones-Devonshire interatomic potential showing the force and the modulus curve for the pair interaction. Positive values indicate repulsion and negative values indicate attraction...

L. M. Field, A. L. Devonshire, B. G. Forde, Molecular Evidence that Insecticide Resistance in Peach-Potato Aphids (Myzus persicae Sulz.) Results from Amplification of an Esterase Gene , Biochem. J. 1988, 257, 309-312. 

MSE.6. 1. Prigogine et G. Garikian, Sur le modele de I etat liquide de Eennard-Jones et Devonshire (On the Lennard-Jones and Devonshire model of the liquid state), J. Chim. Phys., 45, 273-289 (1948). 

MSE.9. 1. Prigogine et P. Janssens, Une generalisation de la methode de Lennard-Jones-Devonshire pour le calcul de I integrale de configuration (A generalization of the Lennard-Jones and Devonshire method foir the calculation of the configuration integral), Physica 16, 895-906 (1950). 

Henry Cavendish was descended from the dukes of Devonshire on one side and from the dukes of Kent on the other. His father, Lord Charles Cavendish, was either the third or the fifth son of the second duke of Devonshire. His mother, Lady Anne Grey, was the daughter of Henry, duke of Kent. She was not in robust health when she married, and she died when Henry was only two years old. 

---