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The effect of low dose gamma irradiation on the metabolism of some toxigenic Fusarium sppO'Neill, Kathleen J. January 1992 (has links)
No description available.
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The effects of electron irradiation on the morphology, modification and microstructure of talc powderHauptstein, Anneliese, Materials Science & Engineering, Faculty of Science, UNSW January 2007 (has links)
Electron irradiation may be a useful method for treating inorganic cosmetic powders such as talc for undesirable microorganisms if it can be established that no loss of quality or efficacy results as a consequence of the technique. A commercial electron accelerator was used to prepare bulk samples by exposure to electron irradiation under different conditions. A morphological characterisation of the control talc was carried out using microscopy techniques and focused on the particle size, shape and surface features of individual particles. Asperity dimensions vs. Roughness values were compared. Assessment of the bulk properties of the powders as a function of absorbed dose showed no serious impact on the quality or efficacy of the powder for cosmetic applications. The particle size and the level of dust expelled during impact were maintained. Changes to the surface chemistry of the irradiated powders were apparent from an increase in pH and water retention with increasing dose. Improvements to the fragrance retention occurred for both irradiated powders tested. Importantly a satisfactory microorganism level was achieved with the lowest absorbed dose level tested i.e. 5 kGy. Analysis of the crystallography did not show the development of a new phase. Mechanical testing using a slip-peel tester found an increase in the stick-slip behaviour occurred for the powder exposed to the highest absorbed dose only. Atomic force microscopy (AFM) testing of the lift-off force showed an increase in adhesion with increasing dose. Surface roughness increased with dose, while no change in elastic properties was found using nanoindentation suggesting the differentiating factor is due to surface features. Microstructural analysis used the transmission electron microscope (TEM). Voids were observed, which decrease in size, yet increase in number with increasing voltage. Prior to void development a loss of crystalinity is seen using electron diffraction. Explorative data analysis using factor analysis and Independent Component Analysis was performed on the void development data to discover the controlling mechanisms. Two distinct normally distributed populations were identified, each driven by 2-3 critical mechanisms. The distinct behaviour differences of the mechanisms may be utilised for characterisation of more complex properties of crystal microstructures.
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Influence du phosphore sur le comportement hors et sous irradiation des aciers austénitiques multistabilisés /Delalande, Christophe. January 1992 (has links)
Th. univ.--Sci. matériaux--Paris 11, 1992. / Bibliogr. p. 99-114. Résumé en français et en anglais.
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Vacancy cluster nucleation during irradiation with preferred point-defect absorptionSi-Ahmed, Abderrahmane. January 1981 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 148-154).
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Chemical effects following the S³⁴ (n, [gamma]) S³⁵ reaction in gaseous sulfur compoundsHyder, Monte Lee. January 1962 (has links)
Thesis (Ph.D.)--University of California, Berkeley, 1962. / "UC-4 Chemistry Distribution" -t.p. "TID-4500 (17th Ed.)" -t.p. Includes bibliographical references (p. 57-60).
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Autoxidation products of cholesterol in aerated sols and irradiated spray-dried egg yolkChicoye, Etzer, January 1968 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1968. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliography.
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Effects of heavy-ion irradiation on the phase stability of several copper-base alloysKnoll, Robert Walter. January 1981 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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A general model for the analysis of the transient radiation damage environment from pulsed thermonuclear radiationHunter, Thomas Oliver. January 1978 (has links)
Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 318-327).
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Effects of ionizing irradiation on paramutation at the R locus in maizeShih, Katherine Lu, January 1968 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1968. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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A varying field size translational bed technique for total body irradiation : a thesis submitted for the degree of Master of Science in Medical Physics at the University of Canterbury, Christchurch, New Zealand /Wilder, Ben. January 1900 (has links)
Thesis (M. Sc.)--University of Canterbury, 2006. / Typescript (photocopy). "August 2006." Includes bibliographical references (leaves 90-92). Also available via the World Wide Web.
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