Richard Hammond

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By specifically binding derivatized colloidal particles and physisorbing nonderivatized particles to the surface of a quartz crystal microbalance (QCM), we have observed positive shifts of frequency, Deltaf, in contrast to the negative frequency shifts typically found in adsorption experiments. Evidently, the Sauerbrey relation does not apply to this(More)
An accurate and precise solid-phase extraction coupled with high performance liquid chromatography (SPE/HPLC) method developed for the quantification of antimicrobial preservatives (methylparaben and propylparaben) in oxytetracycline injectable suspension is described in this article. The SPE technique was necessary to quantify the preservatives since the(More)
OBJECTIVES The overall aim of this study was to examine the nature of the relationship between dog-ownership and canine obesity, explored in two cohorts of overweight/obese or non-overweight dogs (n=125). This paper concentrates on the owners' perception of dog weight. METHODS A researcher-mediated questionnaire was used to collect data from dog owners(More)
It is well known that the Clifford Algebras, and their quaternionic and octonionic subalgebras, are structures of fundamental importance in modern physics. Geoffrey Dixon has even used them as the centerpiece of a novel approach to Grand Unification. In the spirit of Wheeler’s notion of ”pregeometry” and more recent work on quantum set theory, the goal of(More)
OBJECTIVE To investigate the need for sterilization of anaesthetic breathing systems to prevent cross-infection between animals due to the re-use of anaesthetic circuit tubing. STUDY DESIGN Prospective microbiological study. METHODS Bacteriology samples were taken from 37 sterile breathing systems, each used for 1 day, at two sampling sites (one(More)
Abstract: The radiation reaction force is examined for an idealized short pulse of electromagnetic radiation and for a plane wave. Exact solutions (without radiation reaction) are discussed, the total radiated power is calculated. A new and simpler approach to the approximate form of the equation of motion is presented that automatically removes the runaway(More)