Ultrafiltration Culture
Ultrafiltration Culture - Related Videos
02:49
Bacterial Culture Filtrate Protein Concentration using an Ultrafiltration Device
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2025
This video demonstrates the isolation and concentration of bacterial culture filtrate proteins, which include bacterial extracellular vesicles, using ultrafiltration. The concentrated extracellular vesicles serve as diagnostic markers for disease detection.
10:19
Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing
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Cited by 9 •
2016
Design and fabrication of a three-dimensionally (3-D) printed microfluidic cross-flow filtration system is demonstrated. The system is used to test performance and observe fouling of ultrafiltration and nanofiltration (thin film composite) membranes.
09:18
Isolation of Extracellular Vesicles from Murine Bronchoalveolar Lavage Fluid Using an Ultrafiltration Centrifugation Technique
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Cited by 22 •
2018
Here, we describe two extracellular vesicle isolation protocols, ultrafiltration centrifugation and ultracentrifugation with density gradient centrifugation, to isolate extracellular vesicles from murine bronchoalveolar lavage fluid samples. The extracellular vesicles derived from murine bronchoalveolar lavage fluid by both methods are quantified and characterized.
10:53
Concentration of Virus Particles from Environmental Water and Wastewater Samples Using Skimmed Milk Flocculation and Ultrafiltration
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Cited by 2 •
2023
Virus concentration from environmental water and wastewater samples is a challenging task, carried out primarily for the identification and quantification of viruses. While several virus concentration methods have been developed and tested, we demonstrate here the effectiveness of ultrafiltration and skimmed milk flocculation for RNA viruses with different sample types.
12:47
Tangential Flow Ultrafiltration: A “Green” Method for the Size Selection and Concentration of Colloidal Silver Nanoparticles
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Cited by 20 •
2012
Tangential flow ultrafiltration (TFU) is a recirculation method used for the weight-based separation of biosamples. TFU was adapted to size-select (1-20 nm diameter) and highly concentrate a large volume of polydisperse silver nanoparticles (4 L of 15.2 μg ml-1 down to 4 ml of 8,539.9 μg ml-1) with minimal aggregation.
FAQs
Pressure drives the surrounding fluid through a semipermeable membrane, creating controlled movement between the culture compartment and the external medium. The membrane restricts passage according to component size, so cells, tissue fragments, and larger macromolecules remain with the culture while smaller solutes move across. This pressure-dependent separation helps maintain a regulated chemical environment.
Retention keeps cultured cells, tissue fragments, and larger macromolecules in the culture region while smaller solutes pass through. As a result, biologically active components associated with the retained material can become concentrated for analysis, whereas selected small solutes can be exchanged with the surrounding medium. This separation links molecular size to the measured culture response.
Nutrient exchange affects the conditions available for continued cell or tissue growth, while secreted factors can accumulate or be removed according to how the culture environment is regulated. Controlling both processes helps researchers examine developmental signals under defined conditions and distinguish responses associated with proliferation, differentiation, or tissue organization.
A conceptual workflow begins by placing cells or tissue fragments in contact with a surrounding culture medium and a semipermeable membrane. Pressure is then applied to drive fluid movement, while the membrane retains the larger cultured material and allows smaller solutes to pass. Researchers can regulate exchange and concentrate retained biological components for subsequent developmental analysis.
This approach is useful when researchers need to study how controlled extracellular conditions influence cell proliferation, differentiation, or tissue organization. It supports experiments in which nutrient availability and secreted-factor levels must be regulated rather than left entirely to the surrounding medium. The resulting system can help connect environmental changes with developmental tissue responses.
Responses observed after regulating exchange can provide evidence about how developmental material reacts to changes in nutrients or secreted biological factors. Analyses may focus on cell proliferation, differentiation, tissue organization, or the concentration of biologically active components. These outcomes help evaluate developmental signaling and tissue behavior under defined culture conditions.