Transport Retention
Transport Retention - Related Videos
03:10
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2026
Source:Alessia J. Marchesan1, Guillermo Hernandez Ramirez11Renewable Resources, University of Alberta. This video demonstrates the technique for collecting a soil sample for hydraulic property analysis. The sampling area is cleared, and the top crust is evacuated. The sampling ring is then placed into the soil to collect the sample. The ring with the sample is then cleaned, labeled, packed, and transferred undisturbed for analysis.
02:42
Determination of the Calcium Retention Capacity of Isolated Mitochondria
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This video demonstrates the procedure to assess mitochondrial calcium retention capacity by monitoring real-time changes in fluorescence as mitochondria uptake calcium. This assay is useful for studying mitochondrial function and calcium-related processes, including apoptosis and neurodegenerative diseases.
10:26
Transport of Surface-modified Carbon Nanotubes through a Soil Column
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Cited by 5 •
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Surface properties of a nanoparticle are important for their interaction with the surrounding medium. Therefore the surface modification of carbon nanotubes can be critical for their transport and retention through porous media. Here, lab scale column experiments are used to understand the possible transport and retention of these nanoparticles.
11:01
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Our goals were to design, manufacture and test ferromagnetic stents for endothelial cell capture. Ten stents were tested for fracture and 10 more stents were tested for retained magnetism. Finally, 10 stents were tested in-vitro and 8 more stents were implanted in 4 pigs to show cell capture and retention.
01:32
Transport and Acclimatization of Rodents for Research
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Transporting rodents for research requires procedures that minimize stress and maintain animal welfare during movement to minimize the influence on experimental outcomes. Transport cages should provide adequate ventilation,...
FAQs
Retention reflects several interacting factors rather than a single molecular property. Adsorption describes attachment to the stationary material, whereas solubility affects preference for the moving phase. Molecular size can influence access to the medium, and electrostatic interactions can either strengthen or weaken association. Considering these variables together helps explain differences in migration among chemical species.
During repeated partitioning, a species that favors the stationary phase spends more of its transport history there and less in the moving phase. Its average migration therefore decreases relative to a species with weaker association. This relationship makes retention a practical readout of interaction strength, allowing chromatographic behavior to connect molecular chemistry with observed separation.
Repeated partitioning makes retention an accumulated transport effect rather than a single contact event. At each exchange between moving and stationary phases, the species’ preference for one phase influences how quickly it progresses. Small differences in phase preference can therefore produce visibly different migration, which is why chromatographic retention can separate compounds with related chemical behavior.
Beyond chromatography, Transport retention helps assess how chemical species move through porous solids or membranes. In these materials, the relevant outcome is delayed transport associated with interactions between the species and the material. Comparing retention behavior can therefore inform evaluation of material selectivity and how molecular properties influence passage through a structured medium.
A chemist can compare the migration of chemical species under the same chromatographic conditions, then relate different retention behavior to their interactions with the medium. This comparison supports compound distinction, provides a basis for judging separation quality, and helps identify conditions that need optimization in a given analysis.
It is especially useful when analysts need to distinguish compounds, optimize separation conditions, or support purification. The same reasoning extends to designing selective separation processes, where interactions between a chemical species and a material determine relative transport. Thus, retention connects molecular-scale chemistry with practical decisions about analysis, purification, and material performance.