Substrate Topography
Substrate Topography - Related Videos
01:25
Methods of Obtaining Topography
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2025
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
05:49
Laser Micromachining for Polymer Surface Topography Design
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2025
A method for imposing surface topography of light-absorbing composite polymer materials, particularly magnetoactive elastomers (MAEs), by using laser micromachining is presented. This method enables large flexibility in topographical designs and rapid prototyping. An example of structuring MAE surfaces, characterization, and their response to the external magnetic field is demonstrated.
09:11
Revealing Neural Circuit Topography in Multi-Color
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Cited by 6 •
2011
We provide a practical guide for delivering tracers in vivo and use the spinocerebellar pathway as a model system to demonstrate essential steps for successful neuronal circuit analysis in mice. We describe in detail our versatile tracing protocol that exploits wheat germ agglutinin (WGA) conjugated to Alexa fluorophores.
09:23
Wholemount Immunohistochemistry for Revealing Complex Brain Topography
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Cited by 17 •
2012
Neural circuits are topographically organized into functional compartments with specific molecular profiles. Here, we provide the practical and technical steps for revealing global brain topography using a versatile wholemount immunohistochemical staining approach. We demonstrate the utility of the method using the well-understood cytoarchitecture and circuitry of cerebellum.
11:13
Identification of Kinase-substrate Pairs Using High Throughput Screening
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Cited by 1 •
2015
Protein phosphorylation is a central feature of how cells interpret and respond to information in their extracellular milieu. Here, we present a high throughput screening protocol using kinases purified from mammalian cells to rapidly identify kinases that phosphorylate a substrate(s) of interest.
FAQs
Cells first register differences in surface contact and shape through adhesion complexes, which connect the cell membrane to the cytoskeleton. Changes in cytoskeletal tension and cellular geometry then act as intermediate signals that alter biochemical activity. This physical-to-biochemical conversion helps explain why engineered surfaces can produce different patterns of spreading, migration, alignment, proliferation, or differentiation.
Adhesion complexes provide points where cells interact mechanically with the material, while the cytoskeleton organizes cell shape and transmits tension through the cell. Together, they allow cells to respond to grooves, ridges, pillars, pores, and other surface features. Their coordinated activity links the physical interface to downstream changes in cell behavior and development-related responses.
Changing the surface architecture can influence how extensively cells spread, the direction in which they migrate, and whether populations become aligned. It can also affect proliferation and differentiation, making topography useful for examining how physical surroundings contribute to cell-state regulation. These responses provide observable outcomes for comparing different engineered interfaces in bioengineering studies.
Designs may incorporate patterns, grooves, pillars, pores, or ridges at micro- and nanoscale dimensions. These features alter the geometry and amount of surface contact available to cells and biomolecules, creating distinct physical cues. Selecting among them allows investigators to test how different arrangements influence cellular organization and behavior in controlled bioengineering environments.
Researchers introduce engineered surface features into culture environments to control cellular responses and examine the contribution of physical surroundings. They can compare changes in spreading, migration, alignment, proliferation, and differentiation across different arrangements. This approach supports studies of tissue development and disease by separating physical environmental effects from other aspects of the culture setting.
Topographic design helps biomaterials, implants, and tissue-engineering scaffolds present interfaces that are more physiologically relevant than an unstructured surface. By shaping the physical cues encountered by cells and biomolecules, engineers can investigate or guide interactions at the material boundary. The resulting information supports development of materials intended to influence organization, growth, and tissue-related behavior.