Pbs Dialysis
Pbs Dialysis - Related Videos
05:26
Dialysis: Diffusion Based Separation
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2023
Dialysis is a common technique used in biochemistry for separating molecules based on diffusion. In this procedure, a semipermeable membrane allows the movement of certain molecules based on size. This method can be applied to the removal of buffer, known as desalting, or exchanging buffer molecules or ions from a protein solution. This video covers the principles of dialysis along with a general procedure. Several applications of dialysis are reviewed, including the removal of gradient...
01:15
Dialysis
0 Views •
2024
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
01:27
Dialysis
0 Views •
2024
Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF). Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
01:25
Peritoneal Dialysis II: Peritoneal Dialysis Systems and Complications
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2025
Peritoneal dialysis (PD) is a medical process that removes waste products and excess fluid from the body using the peritoneal membrane as a natural filter.Peritoneal Dialysis MethodsSeveral methods can be used for peritoneal dialysis, including Acute Intermittent Peritoneal Dialysis, Continuous Ambulatory Peritoneal Dialysis, and Automated Peritoneal Dialysis, also known as Continuous Cyclic Peritoneal Dialysis.Acute Intermittent Peritoneal Dialysis (AIPD) is used for patients with uremic...
03:00
Measuring Drug Binding to Caseum from Tuberculosis Lesions via the Rapid Equilibrium Dialysis Method
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2025
Source: Sarathy, J. P. et al. An In Vitro Caseum Binding Assay that Predicts Drug Penetration in Tuberculosis Lesions. J. Vis. Exp. (2017)This video demonstrates an in vitro assay for measuring drug binding to caseum from tuberculosis lesions using rapid equilibrium dialysis. It outlines the steps for preparing caseum suspensions, performing dialysis, and calculating the unbound drug fraction to predict drug penetration into caseum.
FAQs
Small solutes move across the membrane because their concentrations differ between the sample and surrounding PBS. Diffusion continues down these concentration gradients, allowing salts, preservatives, and other low-molecular-weight reagents to leave the sample. The process therefore changes the sample’s chemical environment without requiring the retained macromolecules to cross the membrane.
Membrane selectivity depends on the relative size of molecules and the membrane’s ability to limit passage of larger species. Proteins, antibodies, and macromolecular complexes remain enclosed, whereas smaller solutes can diffuse outward. This size-based separation makes PBS dialysis useful when researchers need to alter buffer composition while preserving the sample’s principal biological components.
Removing unwanted low-molecular-weight substances can place a protein or antibody preparation in a more suitable buffer environment. That change may help preserve molecular activity and improve consistency between experiments. In immunology and infection studies, more consistent reagent conditions are important when samples are later used in assays, cell-based experiments, or other downstream analyses.
The essential components are the sample, a semipermeable membrane, and PBS surrounding the enclosed sample. The membrane must permit movement of the smaller solutes targeted for removal while limiting passage of the larger molecules being retained. Immersion in PBS establishes the external buffer environment needed for diffusion and buffer replacement.
Researchers can use this preparation step when protein solutions, antibodies, or biological reagents contain salts, preservatives, or other small reagents that could interfere with later work. Exchanging the buffer before an assay or cell-based experiment helps place the material in PBS and supports more consistent conditions for downstream analysis.
The process can reduce unwanted low-molecular-weight components while retaining proteins, antibodies, and related complexes in the sample. Its main outcome is a change in buffer composition rather than removal of the principal macromolecule. This preparation can make biological reagents more compatible with planned assays, cell-based experiments, and other analyses requiring PBS conditions.