Floating Culture Conditions
Floating Culture Conditions - Related Videos
03:50
Preparing Free-Floating Slice Cultures from an Adult Human Brain
0 Views •
2025
This video demonstrates a technique for preparing free-floating slice cultures from the adult human brain. Thin slices are generated from a brain section using a vibratome. These slices are then suspended in a culture medium supplemented with growth factors to maintain tissue viability.
13:10
Stability of Floating Vessels
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2023
Source: Alexander S Rattner and Kevin Rao Li Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA The objective of this experiment is to demonstrate the phenomenon of stability of floating vessels - the ability to self-right when rolled over to the side by some external force. Careful design of hull shapes and internal mass distribution enables seagoing vessels to be stable with low drafts (submerged depth of hull), improving vessel...
09:14
Short-Term Free-Floating Slice Cultures from the Adult Human Brain
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Cited by 15 •
2019
A protocol to prepare free-floating slice cultures from adult human brain is presented. The protocol is a variation of the widely used slice culture method using membrane inserts. It is simple, cost-effective, and recommended for running short-term assays aimed to unravel mechanisms of neurodegeneration behind age-associated brain diseases.
03:06
Culturing Mycobacterium tuberculosis Under Iron-Limited Conditions
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2025
Source: Gupta, S., et al. Isolation and Characterization of Extracellular Vesicles Produced by Iron-limited Mycobacteria. J. Vis. Exp. (2019)This video demonstrates the procedure for culturing Mycobacterium tuberculosis under iron-limited conditions to induce iron stress and promote the secretion of siderophores that support bacterial survival.
02:45
Culturing Neisseria gonorrhoeae in Metal-Depleted Conditions
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2025
Source: Maurakis, S., and Cornelissen, C. N. Metal-Limited Growth of Neisseria gonorrhoeae for Characterization of Metal-Responsive Genes and Metal Acquisition from Host Ligands. J. Vis. Exp. (2020)This video demonstrates the procedure for growing Neisseria gonorrhoeae under metal-limited conditions using a defined, metal-depleted medium.
FAQs
Preventing attachment allows cells or developing structures to interact across multiple surfaces rather than primarily with a solid substrate. In this suspended arrangement, cells can aggregate and organize in three dimensions while receiving nutrients, gases, and signaling molecules from the surrounding medium. This makes the system useful for examining how cellular interactions contribute to morphogenesis and tissue development.
Nonadherent surfaces and specialized vessels help maintain suspension by limiting the tendency of cells or tissues to attach. Their role is therefore not merely mechanical: they preserve a culture environment in which aggregation and cell-to-cell interactions can occur without substrate attachment dominating the developmental process. This supports studies of organization, differentiation, and emerging tissue structure.
Controlled agitation helps maintain cells, tissues, or developing structures in a suspended state while they remain exposed to the culture medium. Because floating cultures depend on continued access to nutrients, gases, and signaling molecules, agitation is one condition researchers can regulate when shaping the culture environment. Its use is relevant when studying how environmental conditions affect developmental outcomes.
These conditions allow researchers to examine lineage specification alongside three-dimensional aggregation and tissue organization. As cells interact across multiple surfaces, investigators can assess how the surrounding culture environment and cellular relationships relate to developmental changes. The approach is especially relevant when the goal is to connect differentiation with broader processes such as morphogenesis or embryoid body formation.
A general workflow begins by placing cells, tissues, or developing structures in a nonadherent surface or specialized vessel containing culture medium. Researchers then maintain suspension, using controlled agitation when appropriate, while supplying the nutrients, gases, and signaling molecules required for growth. Subsequent observation focuses on aggregation, organization, differentiation, or other developmental outcomes supported by the model.
Researchers may choose floating conditions when they need to investigate three-dimensional aggregation, interactions across multiple cellular surfaces, or developmental organization without attachment to a solid substrate. The arrangement is particularly useful for morphogenesis, lineage specification, embryoid body formation, and organoid development. It helps distinguish effects associated with cellular interactions and culture conditions from those linked to substrate attachment.
Floating cultures can support several developmental models, including cell aggregates, embryoid bodies, and organoid development. They provide a setting for examining tissue organization, morphogenesis, and lineage specification while cells remain exposed to defined nutrients, gases, and signaling molecules. The resulting observations can help researchers relate environmental conditions and cellular interactions to developmental outcomes.