Soft Hard Substrate
Soft Hard Substrate - Related Videos
02:37
Dissection of Palate Tissue from Adult Murine Model: A Surgical Procedure to Harvest Hard Palate and Soft Palate from Oral Cavity of Adult Mouse
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2025
This video demonstrates a surgical procedure to dissect the palate tissue from a murine model.
09:28
Isolation of Primary Human Colon Tumor Cells from Surgical Tissues and Culturing Them Directly on Soft Elastic Substrates for Traction Cytometry
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Cited by 11 •
2015
A protocol is described to extract primary human cells from surgical colon tumor and normal tissues. The isolated cells are then cultured on soft elastic substrates (polyacrylamide hydrogels) functionalized by an extracellular matrix protein, and embedded with fluorescent microbeads. Traction cytometry is performed to assess cellular contractile stresses.
07:53
Soft Lithography
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2023
Many BioMEM devices, such as microfluidic channels, are fabricated using the soft lithography technique. Here, a microscale pattern is replicated by curing an elastomeric polymer over the 3D structure. These polymeric structures are then used to create a wide range of devices, ranging from microfluidic channels for biosensing applications to microscale bioreactors for the visualization of micro-colonies. This video introduces photolithography and demonstrates the technique in the laboratory.
08:01
Rockwell Hardness Test and the Effect of Treatment on Steel
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Hardness testing is one of the most universally valuable mechanical tests available to engineers, as it is both simple and relatively inexpensive for the wealth of information and data it produces. Hardness testing, generally in the form of a surface penetration test, is both quicker and less destructive than tensile testing. Hardness provides a linear relationship with tensile strength over a...
08:21
Quantitative Hardness Measurement by Instrumented AFM-indentation
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Cited by 6 •
2016
This experimental protocol describes how atomic force microscopy can be used to measure hardness at the true nanometer scale and to detect single atomistic plasticity events.
FAQs
Cells detect mechanical resistance through integrin-mediated adhesion, which connects the cell to its surrounding substrate. This interaction supports focal adhesion assembly and activates force transmission through the cytoskeleton. As a result, rigidity-dependent signals can change cell spreading, migration, cytoskeletal organization, and other behaviors, allowing physical conditions to influence biological activity without changing the cell’s chemical environment.
Integrins provide the adhesive connection between a cell and its substrate, while focal adhesions organize that connection into signaling and force-bearing sites. Their assembly helps cells sense whether the surrounding material resists deformation. Differences in this mechanical feedback can influence how strongly cells spread, how they organize their cytoskeleton, and how they respond to the culture environment.
Actomyosin-generated forces allow cells to pull against their adhesions and test the mechanical resistance of the substrate. This force transmission links substrate stiffness with cytoskeletal organization and downstream signaling. Comparing soft and hard conditions therefore reveals how internally generated tension contributes to changes in cell shape, movement, and functional behavior, making actomyosin activity central to mechanobiology studies.
A comparison begins by placing comparable cell populations in controlled soft and hard substrate environments, then examining outcomes such as spreading, migration, cytoskeletal organization, and signaling. Researchers can interpret differences between the conditions as responses to mechanical context when other culture variables are held consistent. This approach creates a controlled way to study how physical cues regulate cellular behavior.
These studies can examine how mechanical cues contribute to differentiation, tissue development, wound repair, and disease progression. By changing the physical environment while observing cellular responses, researchers can connect substrate mechanics with biologically important outcomes. The approach is especially useful when native tissue conditions need to be represented more realistically than in a uniform culture environment.
Soft and hard substrate models help researchers evaluate whether biomaterials, tissue-engineering scaffolds, or in vitro systems provide mechanically appropriate environments for cells. Observing adhesion, spreading, migration, cytoskeletal organization, and signaling can guide material design. These comparisons also support efforts to reproduce native cellular conditions more effectively and to build experimental models relevant to tissue behavior and disease.