201
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Miller GA, Thomas AW, Williams AG. Charge-symmetry breaking in neutron-proton elastic scattering. PHYSICAL REVIEW LETTERS 1986; 56:2567-2570. [PMID: 10033032 DOI: 10.1103/physrevlett.56.2567] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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202
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Butler PF, Thomas AW, Thompson WE, Wollerton MA, Rachlin JA. Simple methods to reduce patient exposure during scoliosis radiography. Radiol Technol 1986; 57:411-7. [PMID: 3715012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Radiation exposure to the breasts of adolescent females can be reduced significantly through the use of one or all of the following methods: fast, rare-earth screen-film combinations; specially designed compensating filters; and breast shielding. The importance of exposure reduction during scoliosis radiography as well as further details on the above described methods are discussed. In addition, the early results of a Center for Devices and Radiological Health study, which recorded exposure and technique data for scoliosis radiography, is presented.
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203
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Veit EA, Jennings BK, Thomas AW. Pion-nucleon scattering in the cloudy bag model. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1986; 33:1859-1866. [PMID: 9956844 DOI: 10.1103/physrevd.33.1859] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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204
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Dunne GV, Thomas AW. On the interpretation of the European Muon Collaboration effect. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1986; 33:2061-2064. [PMID: 9956876 DOI: 10.1103/physrevd.33.2061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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205
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Williams AG, Thomas AW. Color-dielectric model as an explanation of the Nolen-Schiffer anomaly. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1986; 33:1070-1078. [PMID: 9953241 DOI: 10.1103/physrevc.33.1070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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206
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Morgan MA, Miller GA, Thomas AW. Current algebra and the cloudy-bag model. Int J Clin Exp Med 1986; 33:817-829. [PMID: 9956699 DOI: 10.1103/physrevd.33.817] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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207
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Veit EA, Jennings BK, Thomas AW, Barrett RC. S-wave meson-nucleon scattering in an SU(3) cloudy bag model. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1985; 31:1033-1044. [PMID: 9955794 DOI: 10.1103/physrevd.31.1033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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208
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Thomas AW, Deans JA, Mitchell GH, Alderson T, Cohen S. The Fab fragments of monoclonal IgG to a merozoite surface antigen inhibit Plasmodium knowlesi invasion of erythrocytes. Mol Biochem Parasitol 1984; 13:187-99. [PMID: 6513992 DOI: 10.1016/0166-6851(84)90112-9] [Citation(s) in RCA: 116] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Two rat monoclonal antibodies (both IgG2a isotype and having closely related specificities) and a pool of rhesus immune IgG, all of which inhibit Plasmodium knowlesi merozoite invasion of rhesus erythrocytes, have been studied before and after proteolytic digestion. The F(ab')2 and Fab fragments of both rat monoclonal antibodies show considerably enhanced inhibition of merozoite invasion as compared with the intact IgG. Inhibition by monovalent fragments indicates that these antibodies are not dependent upon merozoite agglutination and may act by blocking merozoite attachment to the specific red cell receptor. The fact that the inhibitory activities of F(ab')2 and Fab are equally enhanced on a weight basis, as compared with IgG, suggests that the removal of Fc may reduce electrostatic repulsion between antibody and merozoite surface, both of which are negatively charged at neutral pH. By contrast, papain digestion of polyclonal IgG derived from an immunised rhesus pool markedly reduces its inhibitory activity. This suggests that much of the inhibition mediated by polyclonal IgG results from merozoite agglutination and that the specificity of the rat inhibitory monoclonal antibodies is poorly represented in the immune pool. The P. knowlesi antigen reactive with the inhibitory monoclonal antibodies is known to be synthesized as a minor 66 kDa polypeptide during the last 1.5 h. of schizont development and is processed to smaller products (44 and 42 kDa) present on the merozoite surface. The present results suggest that this antigen may have particular interest as a vaccine against P. knowlesi malaria.
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209
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Deans JA, Thomas AW, Alderson T, Cohen S. Biosynthesis of a putative protective Plasmodium knowlesi merozoite antigen. Mol Biochem Parasitol 1984; 11:189-204. [PMID: 6749179 DOI: 10.1016/0166-6851(84)90065-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A putative protective Plasmodium knowlesi antigen, recognized by two monoclonal antibodies which prevent invasion of erythrocytes by merozoites in vitro, is synthesised only by schizonts with 7 or more nuclei, during the last 1.5-2 h of the 24 h erythrocytic cycle of parasite development. The 66 000 MW antigen, which constitutes a minor parasite protein, is processed at the time of schizont rupture and merozoite release, to give rise to two smaller molecules of 44 000 and 42 000 MW. The 44 000 and 42 000 MW antigens and traces of the 66 000 MW antigen are present on the surface of isolated merozoites and the smaller antigens are readily shed. The antigens which are shed are soluble in culture medium and are not readily degraded further. None of the molecules can be detected in newly invaded ring stage parasites, indicating that they are either excluded when the merozoite invades, or if internalised, they rapidly undergo further structural alteration since newly parasitised red cells no longer contain epitopes which react with the inhibitory monoclonal antibodies. This antigen is distinct from other putative protective antigens described in bloodstage malaria parasites.
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210
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Deans JA, Thomas AW, Inge PM, Cohen S. Stage-specific protein synthesis by asexual blood stage parasites of Plasmodium falciparum. Mol Biochem Parasitol 1983; 8:45-51. [PMID: 6348535 DOI: 10.1016/0166-6851(83)90033-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Highly synchronised cultures of cloned Plasmodium falciparum (clone T9-94) were metabolically radiolabelled with [35S]methionine during eight consecutive non-overlapping intervals, while parasites developed from young rings to mature schizonts. Analysis of equal amounts of trichloroacetic acid precipitable radioactivity from each interval by sodium dodecyl sulphate-polyacrylamide gel electrophoresis fluorography allowed the stage specificity of protein synthesis to be investigated. More than forty polypeptides with molecular weights of 20 000 to 200 000 can be distinguished. While some proteins are synthesised throughout erythrocytic schizogony many are shown to be stage-specific. Among these are a range of high molecular weight proteins synthesised only during nuclear division. Detailed morphological information permits correlations to be made between synthesis of particular polypeptides and parasite structure.
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211
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Deans JA, Thomas AW, Cohen S. Stage-specific protein synthesis by asexual blood stage parasites of Plasmodium knowlesi. Mol Biochem Parasitol 1983; 8:31-44. [PMID: 6877279 DOI: 10.1016/0166-6851(83)90032-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
P. knowlesi parasites with a maximum age distribution of 3 h were metabolically labelled with [35S]methionine during 9 sequential non-overlapping intervals, from young rings to mature segmented schizonts. The proteins synthesised at the different stages were compared using sodium dodecyl sulphate-polyacrylamide gel electrophoresis; more than 40 polypeptides (Mr 20 000 to over 200 000) were identified in the different parasite preparations. The major polypeptides synthesised by rings and trophozoites of different ages were similar, but differences in minor polypeptides could always be recognised. At the onset of schizogony ring and trophozoite specific proteins ceased to be synthesised and proteins specific to schizogony emerged. In general, schizont-specific proteins were of higher molecular weight than ring stage proteins. Details of the morphological changes which occurred during the metabolic labelling episode permits correlation between parasite structure and synthesis of particular polypeptides. Comparison of parasite components metabolically labelled with [3H]glucosamine during defined periods of development also revealed stage-specific synthesis of glycoproteins. The extent to which proteins are altered after synthesis has been investigated by pulse-chase experiments.
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212
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Deans JA, Alderson T, Thomas AW, Mitchell GH, Lennox ES, Cohen S. Rat monoclonal antibodies which inhibit the in vitro multiplication of Plasmodium knowlesi. Clin Exp Immunol 1982; 49:297-309. [PMID: 6751636 PMCID: PMC1536485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A total of 28 double cloned monoclonal antibodies specific for Plasmodium knowlesi were raised by fusion of Y3 rat myeloma cells with spleen cells of A0 rats immunized with W1 variant isolated merozoites. Four of these antibodies reacted positively in a solid phase radioimmunoassay against glutaraldehyde-fixed schizonts but gave no detectable reaction on indirect immunofluorescence against methanol-fixed schizonts or merozoites. The remaining 24 antibodies could be divided into 13 distinctive immunofluorescent categories on the basis of their patterns of binding to schizonts and merozoites and reactivity with Plasmodium falciparum. Eight antibodies were studied for their ability to inhibit the in vitro multiplication of W1 P. knowlesi as assessed by parasite incorporation of 3H-amino acids and parasite counts. Partially purified antibody preparations from ascitic fluids were all inhibitory for parasite growth; however, when fully purified antibodies were tested, six of the eight proved to be non-inhibitory. Two of the purified antibodies, both IgG2a isotype, inhibited the in vitro multiplication of P. knowlesi in a dose-dependent manner. Inhibition was not associated with detectable damage to intracellular parasites, suggesting that the inhibitory monoclonal antibodies act by blocking the reinfection of red cells by newly released merozoites. On immunofluorescent analysis both inhibitory antibodies bound to methanol-fixed schizonts, with the intensity increasing for progressively more mature parasites; both reacted diffusely with isolated merozoites, and neither cross-reacted with P. falciparum. Both bound specifically to a single metabolically labelled polypeptide which appears to be a minor parasite component and has an approximate molecular weight of 66,000 when analysed by SDS-PAGE fluorography. The putative protective antigen of P. knowlesi has potential interest as a vaccine against P. knowlesi malaria.
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Thomas AW. Dentist creates a unique office with solar energy. DENTAL ECONOMICS - ORAL HYGIENE 1981; 71:83-4, 86. [PMID: 6949837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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214
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Thomas AW, Borland SA, Greenbank DO. Field fecundity of the spruce budworm (Lepidoptera: Tortricidae) as determined from regression relationships between egg complement, fore wing length, and body weight. CAN J ZOOL 1980. [DOI: 10.1139/z80-220] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The assumption that the number of eggs laid by a spruce budworm moth in the field is the same as the number laid under laboratory conditions is shown to be false. A method is described for estimating what proportion of the potential fecundity obtained in the laboratory is actually laid in the field. The proportion was shown to range from 0 to 1 for individual females, but averaged between 0.70 and 0.86 for a given population at one locality. Results of this investigation have implications in population dynamics studies of the spruce budworm.
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215
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Parker JC, Casey GE, Bahlman LJ, Leidel NA, Rose D, Stein HP, Thomas AW, Lane JM. NIOSH current intelligence bulletin No. 27. Chloroethanes: review of toxicity. AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1979; 40:A46-60. [PMID: 495456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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216
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Bahlman LJ, Leidel NA, Parker JC, Stein HP, Thomas AW, Woolf BS, Millar JD. Ethylene dichloride (1,2-dichloroethane). AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1978; 39:A35-43. [PMID: 727114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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217
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Thomas AW, Boeniger MF, Weber MG, Stein HP, Upton AC, Millar JD. Direct black 38, direct blue 6, direct brown 95, benzidine derived dyes. AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1978; 39:A-18-A-24. [PMID: 581253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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218
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Stein HP, Bahlman LJ, Leidel NA, Parker JC, Thomas AW. Ethylene dibromide and disulfiram toxic interaction. AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1978; 39:A35-7. [PMID: 358819 DOI: 10.1080/0002889778507820] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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219
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Thomas AW. Records of horse flies and deer flies (Diptera: Tabanidae) in New Brunswick. CAN J ZOOL 1978. [DOI: 10.1139/z78-215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Forty-three species of tabanids in five genera are recorded from New Brunswick. Locality data, notes on seasonal distribution, and relative abundance are given. Modifications to keys of tabanids of the Maritime Provinces are given.
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220
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Stein HP, Bahlman LJ, Leidel NA, Parker JC, Thomas AW, Millar JD. Ethylene thiourea (ETU). AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1978; 39:A34, A36. [PMID: 685822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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221
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Parker JC, Bahlman LJ, Leidel NA, Stein HP, Thomas AW, Wolf BS, Baier EJ. Current NIOSH Intelligence Bulletin No. 20: Tetrachloroethylene (perchloroethylene). AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1978; 39:A-23-A-29. [PMID: 580543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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222
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Stein HP, Bahlman LJ, Parker JC, Leidel NA, Thomas AW, Woolf BS, Baier EJ. Current NIOSH Intelligence Bulletin No. 19: 2,4-Diaminoanisole in hair and fur dyes. AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1978; 39:A-17-A-21. [PMID: 580542 DOI: 10.1080/0002889778507752] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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223
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224
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Moore RM, Woolf BS, Stein HP, Thomas AW, Finklea JF. Metabolic Precursors of a Known Human Carcinogen. Science 1977. [DOI: 10.1126/science.195.4276.344.c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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225
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Brown J, Frame W, Thomas AW. Report on the alcoholic needs help campaign in Glasgow. HEALTH BULLETIN 1973; 31:195-200. [PMID: 4795071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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226
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Romanoff LP, Thomas AW, Baxter MN. Effect of age on pregnanediol excretion by men. JOURNAL OF GERONTOLOGY 1970; 25:98-101. [PMID: 5421794 DOI: 10.1093/geronj/25.2.98] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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227
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Romanoff LP, Baxter MN, Thomas AW, Ferrechio GB. Effect of ACTH on the metabolism of pregnenolone-7 alpha-3H and cortisol-4-14C in young and elderly men. J Clin Endocrinol Metab 1969; 29:819-30. [PMID: 4306478 DOI: 10.1210/jcem-29-6-819] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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228
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Romanoff LP, Malhotra KK, Baxter MN, Thomas AW, Pincus G. Metabolism of 17 alpha-hydroxypregnenolone-7 alpha-3H and 17 alpha-hydroxyprogesterone-4-14C in young and elderly men. J Clin Endocrinol Metab 1968; 28:836-48. [PMID: 5659009 DOI: 10.1210/jcem-28-6-836] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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229
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Romanoff LP, Baxter MN, Malhotra KK, Thomas AW. Isolation of a pregnenolone metabolite, delta-5-pregnene- 3-alpha, 16-alpha, 20-alpha-triol, from the urine of normal men. J Clin Endocrinol Metab 1967; 27:605-9. [PMID: 6025467 DOI: 10.1210/jcem-27-5-605] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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230
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231
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Thomas AW. The Nomenclature Used in Colloid Chemistry. A Plea for Reform. Science 1918; 47:10-4. [PMID: 17833596 DOI: 10.1126/science.47.1201.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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232
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Thomas AW. Stinging Jelly-fish. West J Med 1908. [DOI: 10.1136/bmj.2.2504.1896-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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233
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Thomas AW. THE DECLINE IN THE BIRTH-RATE. West J Med 1906. [DOI: 10.1136/bmj.2.2390.1066-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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234
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Thomas AW. A Plea for the Investigation of Catarrh. West J Med 1905. [DOI: 10.1136/bmj.2.2348.1719-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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