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No description available.

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.

Copies of author's previously published articles inserted. / Bibliography: leaves 161-187. / 187, [53] leaves, [54] leaves of plates : ill., maps ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The pineal complex in gekkotans was examined and compared under the optical and transmission electron microscope in order to elucidate the morphological evidence supporting a role for the pineal organ of these lizards in circadian function. / Thesis (Ph.D.)--University of Adelaide, Dept. of Anatomical Sciences, 1998

2 v. : ill., folded tables in backpocket of vol 1. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Botany, 1971

2 v. : ill., folded tables in backpocket of vol 1. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Botany, 1971

This thesis takes as its starting point proposals to model inflectional paradigms as geometrical structures, wherein systematic homonymies are constrained to occupy contiguous regions. It defines a precise criterion for assessing systematicity and shows, for a range of largely Indo-European and Afro-Asiatic data, that such models are observationally adequate in modelling systematic homonymies within a single inflectional dimension, and to a lesser extent, between different inflectional dimensions. This is taken to indicate that widely assumed characterizations of inflectional categories in terms of cross-classifying binary features are incorrect, inasmuch as such characterizations fail to predict the linearizability of natural classes of properties belonging to those categories. The same inadequacy besets attempts to account for systematic homonymies by means of rules that convert or 'refer' one morpho-syntactic representation to another. Rather it is argued that the linearizability of natural classes of properties suggests that inflectional categories are structured as a sub-classification of those properties, but that a phenomenon of 're-marking' serves to define, under strict constraints, additional natural classes beyond those defined by the sub-classification itself. The specific sub- classifications indicated by observed patterns of homonymy are language-specific. In addition, the properties so sub-classified under a single node may in certain cases be drawn from separate morpho-syntactic categories. This is taken to indicate that the terminal nodes of a morphological sub-classification are not morpho-syntactic feature complexes but purely morphological functions performing a discontinuous mapping between morpho-syntactic and morpho-phonological representations. The systematicity of homonymy patterns, then, is shown to be evidence for a linguistic level of 'pure morphology'.

Thesis (Ph.D.) -- University of Adelaide, Dept. of Botany, 1971.

Thesis (Ph. D.)--University of Chicago. / Reprinted from Botanical gazette, vol. XXXVII, no. 1, January, 1904. "Literature cited": p. 19. Also available on the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 21-22). Also available via the Internet.