Arfon H. Jones

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This paper compares three analytical methods that may be considered for monitoring workers who are exposed to carbon disulphide (CS2). An estimate of the uptake of CS2 was assessed by the measurement of "bound" CS2 in blood, CS2 in expired alveolar air, and 2-thiothiazolidine-4-carboxylic acid (TTCA) in urine. The concentration of TTCA in end-of-shift urine(More)
PURPOSE This study recorded in vitro color change of three tooth bleaching techniques that included laser-activated hydrogen peroxide and two concentrations of carbamide peroxide. MATERIALS AND METHODS Forty extracted human central incisors were exposed to argon laser-activated 35% H2O2, 10% carbamide peroxide, or 20% carbamide peroxide. A fourth group(More)
STATEMENT OF PROBLEM Provisional restorations play a critical role in the success of restorative treatment. Thus, the provisional restoration must maintain its surface integrity throughout the restorative process. PURPOSE This study evaluated the microhardness of 5 prosthodontic provisional materials. MATERIAL AND METHODS Cylindrical samples of 3(More)
OBJECTIVE To evaluate clearance, antibody responses, potential shedding, and histologic lesions in reproductive tissues of adult bison bulls after vaccination with Brucella abortus strain RB51. ANIMALS 61 two- and 3-year-old bison bulls. PROCEDURE 12 bison bulls were vaccinated s.c. with B abortus strain RB51, 3 were inoculated s.c. with 0.15 M NaCl,(More)
The attenuation of high pressure shock waves has been investigated. High purity copper, 6061-T6 aluminum, 6A1-4V and a phase titanium, an uranium alloy and two alloys of beryllium were examined experimentally at pressures as high as 3 megabars. Low pressure experiments were instrumented with a velocity laser interferometer. Intermediate pressures (to(More)
One hundred and fourteen adults with hearing loss, but without otorrhoea, were studied with the aim of establishing whether tympanometry could be used as a screening test to identify potentially treatable aural pathology. Tympanometry was compared with independent otoscopy. No middle ear pathology likely to be of significance in an elderly person was found(More)
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