London susceptibility

Ring currents cannot be directly determined by experimental methods. However, comparison of experimental values of magnetic susceptibilities and their exaltations and anisotropies as well as of H-NMR chemical shifts with the respective data calculated from the ring current model points to the adequacy of this model for the interpretation of experimental results. The magnetic susceptibility associated with the ring current / (83BCJ1853), known as the London susceptibility, is given by... 

The anisotropy of the magnetic susceptibility of a cyclic conjugated system, attributable to induced ring currents in its rc-electron network, is one of the important quantities indicative of 7t-electron delocalization. The method used for the calculation of the magnetic susceptibilities of nonalternant hydrocarbons is the London-Hoarau method taken together with the Wheland-Mann SCF technique . The resonance integral is assumed again to be of exponential form but... 

Certain areas are unusually susceptible to air pollution disasters. One during 1930, in the Meuse Valley of Belgium, caused the premature death of over 60 people. Another in 1948 at Donora, Pa., caused 20 deaths. A third resulted in the deaths of 22 people at Poza Rica, Mexico. The greatest occurred Dec. 5-9, 1952, in London, England. Over 4,000 people are estimated to have died from respiratory ailments as a result of the smog. Each of these occurred in an industrial valley at the time of a temperature inversion.16... 

Van Vleok, J. H., Theory of Electric and Magnetic Susceptibilities. Oxford Univ. Press, London and New York, 1932. 

Toy balloons were introduced by Thomas Hancock in 1825 as a do-it-yourself kit that consisted of a rubber solution and a syringe. Vulcanized toy balloons were initially manufactured by J.G. Ingram of London in 1847. The vulcanizing caused the balloons to be nontacky and not susceptible to becoming excessively tacky on hot days. Montgomery Ward had balloons in their catalog by 1889. 

For discussion of experimental methods and more detailed discussion of the theory see C. P. Smyth, Dielectric Constant and Molecular Structure, McGraw-Hill Book Co., New York, 1955 or J. W. Smith, Electric Dipole Moments, Butterworths, London, 1955. A more detailed theoretical treatment is given by J. H. Van Vleck, The Theory of Electric and Magnetic Susceptibilities, Oxford University PresB, 1932. 

Torres JL. 2003. Enhanced susceptibility in homeopathic experiments. In Improving the success of Homeopathy 4 Bridging the credibility gap. International conference 3-4 April 2003, London. The Royal London Homeopathic Hospital, University College London Hospitals, pp 16-20. 

Van Meerwall E, Grigsby J, Tomich D, Van Antverp R (1982) Effect of chain-end free volume on the diffusion of oligomers. J Polym Sci Polym Phys Ed 20(6) 1037-1053 Van Vleck JH (1932) The Theory of electric and magnetic susceptibilities. Oxford University Press, London... 

Dearing, J. A., 1999, Magnetic susceptibility, in Environmental Magnetism a Practical Guide, J. Walden, F. Oldfield, and J. P. Smith, eds.. Technical Guide No. 6, Quaternary Research Association, London, pp. 35-62. 

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