Chris A. Clarkson

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Fat, oil and grease deposits (FOG) in sewers are a major problem and can cause sewer overflows, resulting in environmental damage and health risks. Often simplistically portrayed as cooling of fats, recent research has suggested that saponification may be involved in FOG formation. However there are still questions about the mechanisms effecting(More)
Two bovine immunoglobulin constant region gamma heavy chain germline gene sequences are described. A gamma 1 gene was cloned from a lambda 2001 calf liver library screened with a human gamma 4 (pBRH4.1) probe and is contained in a 5.8 kb BamH1 hybridizing fragment. The gamma 2 gene was from an EMBL4 lambda library and is in a 6.6 kb BamH1 fragment. Each of(More)
Samples of Late Devonian/Early Mississippian New Albany Shale from the Illinois Basin, having maturities ranging from early mature to postmature, were analysed using micro-Fourier transform infrared (FTIR) spectroscopy, ImageJ processing software and scanning electron microscopic X-ray spectroscopy to explore the distribution, connectivity and chemical(More)
We investigate generation of electromagnetic radiation by gravitational waves interacting with a strong magnetic field in the vicinity of a vibrating Schwarzschild black hole. Such an effect may play an important role in gamma-ray bursts and supernovae, their afterglows in particular. It may also provide an electromagnetic counterpart to gravity waves in(More)
We study scalar field and electromagnetic perturbations on Locally Rotationally Symmetric (LRS) class II spacetimes, exploiting a recently developed covariant and gauge-invariant perturbation formalism. From the Klein-Gordon equation and Maxwell’s equations, respectively, we derive covariant and gaugeinvariant wave equations for the perturbation variables(More)
Ovine mesenteric lymph node mRNA was used for PCR amplification of DNA coding for immunoglobulin gamma 1 and gamma 2 heavy chain constant regions. Primers complementary to regions of CH1 conserved between ruminants were used for upstream priming, with downstream priming on the poly-A segment. PCR products of the appropriate length were cloned and gamma(More)
The immunological competence of foetal (85 days of gestation), neonatal and older pigs has been assessed by their ability to make heterogeneous IgG antibody to dinitrophenyl (DNP) hapten. Antibody heterogeneity was resolved by isoelectric focusing (IEF) followed by overlay of labelled antigen. Choice of protein carrier (bovine serum albumin, keyhole limpet(More)
Lipopolysaccharide (LPS) was prepared by phenol/water extraction of bacterial membranes prepared from Acinetobacter and Escherichia coli. The mitogenicity of laboratory-prepared LPS was significantly greater than that of commercial E. coli LPS for pig, sheep, calf and rat lymphocytes, assayed as [3H]-thymidine incorporation. Mouse lymphocytes responded well(More)