Thesis (Ph. D.)--University of Chicago, 1921. / "Private edition distributed by the University of Chicago libraries, Chicago, Illinois." "Reprinted from the Journal of the American Chemical Society, vol. XLIV, no. 12, December, 1922." Also available on the Internet.

Thesis (Ph. D.)--Johns Hopkins University, 1917. / Biography.

Thesis (D. Sc.)--University of Madras. / Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1984. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 146-149).

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 241-247).

Thesis--Wisconsin. / Vita. Includes bibliographical references.

Experiments were conducted on the motion of micron-size, spherical latex particles in stagnant liquids due to applied temperature gradients. The phenomenon, called thermophoresis, has previously been reported for gases but not for liquids. Dilute suspensions of particles in water or n-hexane were trapped between two horizontal, parallel disks. The top disk was heated whereas the lower one was cooled, thus creating a temperature gradient in the liquid. The particle motion was measured by observing light reflected from the spheres with a low power microscope. The particle thermophoretic velocity, vth, was found to be a function of temperature gradient, ▽T, absolute temperature, TK, particle thermal conductivity, kp , fluid thermal conductivity, kf, viscosity, μ, and density, ρ: [ Formula omitted ] This equation was tested in the ranges 284 °K <_ TK <_ 343 °K and 7,000 °K m ̄¹ <_ ▽T <_ 30.J.00.0. °K m ̄¹ . No dependence, on particle diameter was noted. Thermophoresis in liquids is a weak effect and impractical for liquid-particle separation. It may, however, be important in engineering situations where large temperature gradients occur. / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

The mathematical problem of the pipette aspiration of a liquid sphere is studied in the low Reynolds number limit. Two distinct models are proposed for the deforming body. They are: 1) a liquid droplet of constant viscosity, and 2) a viscoelastic cortex encapsulating an inviscid interior. These models represent energy dissipation distributed in the interior and on the surface of the body, respectively. Because the in-flow rates vary differently with the pipette size for the two models, this is suggested as a means of experimentally identifying the dominant region of viscous dissipation, and thus provide insight into the internal structure of the test sample. For the droplet problem, the linear Stokes equations are solved in the interior of the deforming body. The solutions, for some specified stress boundary conditions on a sphere, can be expressed as infinite sums of Legendre polynomials. In solving the surface flow problem, the complexities of the equations necessitate approximate solutions by computational means. A numerical procedure is developed which compares well with analytical results when the latter is available. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

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