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Surface Topography Hinders Bacterial Surface Motility
ACS Applied Materials & Interfaces, 2018We demonstrate that the surface motility of the bacterium, Pseudomonas aeruginosa, is hindered by a crystalline hemispherical topography with wavelength in the range of 2-8 μm. The motility was determined by the analysis of time-lapse microscopy images of cells in a flowing growth medium maintained at 37 °C.
Yow-Ren Chang +2 more
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Surface topography by caustics
Applied Optics, 1976The optical method of caustics, initially developed for recording abrupt plate slopes created by singularities in elastic stress fields, was extended to incorporate the study of the general case of any type of surface. A universal technique, based on the general theory of caustics developed in this paper, was formulated to study the topography of any ...
P S, Theocaris, E E, Gdoutos
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Topography-driven surface renewal
Nature Physics, 2018Natural surfaces excel in self-renewal and preventing bio-fouling, while synthetic materials placed in contact with complex fluids quickly foul [1, 3]. We present a novel biophysics inspired mechanism [4, 5] for surface renewal using actuating surface topography, generated by wrinkling.
Luka, Pocivavsek +7 more
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Surface Topography for Patient Repositioning
Medical Dosimetry, 1991For many years, this group has been interested in the measurement of patient surface contours in order to prepare radiotherapy compensators. Recently, these surface measurements have been made using optical ranging techniques (Medical Physics 16:425; 1989).
J A, Berry, J E, Aldrich
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Control of Cell Surface Topography
Nature, 1974ACCORDING to the fluid mosaic model of membrane structure1, surface proteins are free to diffuse in a lipid matrix and thus to assume a random or homogenous distribution over the cell surface. In support of this model it has been shown that the distribution of glycoprotein receptors for the plant lectin concanavalin A (con A) is random in all cell ...
R D, Berlin +3 more
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Surface topography of ultramicrotome sections
Journal of Ultrastructure Research, 1969During ultramicrotomy the blocks of embedding medium are compressed to a certain degree by the cutting force of the knife, and a section cut under such conditions does not necessarily correspond to a flat plane through the uncompressed block. After each stroke over the knife the block resumes its uncompressed shape, and the cut surface of the block ...
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Entire topography of lunar surface
ACM SIGGRAPH ASIA 2009 Computer Animation Festival, 2009The Japanese spacedraft Kaguya (Selene) was launched on 14 September 2007 by the Japan Aerospace Exploration Agency. Its objectives are "to obtain scientific data of the lunar origin and evolution and to develop the technology for future lunar exploration."
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1994
Abstract Most surfaces have regular and irregular spacings that tend to form a pattern or texture on the surface. This article provides information on the general background of surface topography and discusses the different methods for measuring surface topography, namely, contact and noncontact techniques, and the focus-follow method ...
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Abstract Most surfaces have regular and irregular spacings that tend to form a pattern or texture on the surface. This article provides information on the general background of surface topography and discusses the different methods for measuring surface topography, namely, contact and noncontact techniques, and the focus-follow method ...
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Surface Topography and Surface Contaminants
1998Most surfaces of solids are rough, at least on a microscopic scale. Most engineering surfaces are covered by asperities having slopes in the range 5° – 10°. Unlubricated metal surfaces encountered in an industrial environment will, in general, be covered by a whole series of surface films, as shown in Fig. 4.1. Working outwards from the metal interior,
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