Mass Balance Analysis
Mass Balance Analysis - Related Videos
10:23
Lipid Droplet Isolation for Quantitative Mass Spectrometry Analysis
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Cited by 7 •
2017
Lipid droplets are important organelles for the replication of several pathogens, including the Hepatitis C Virus (HCV). We describe a method to isolate lipid droplets for quantitative mass spectrometry of associated proteins; it can be used under a variety of conditions, such as virus infection, environmental stress, or drug treatment.
02:58
Balancing Redox Equations
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2020
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
07:03
Assessment of Motor Balance and Coordination in Mice using the Balance Beam
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Cited by 395 •
2011
Deficits in fine motor coordination can be assessed with the balance beam test. Performance on the beam is quantified by the speed at which the beam is traversed and the number of times the mouse slips on the beam.
13:09
Mass Spectrometric Analysis of Glycosphingolipid Antigens
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Cited by 9 •
2013
A specific and sensitive method to gain insight into the expression profile of glycosphingolipid antigens in immune organs and cells is described. The method takes advantage of the ion trap mass spectrometry allowing step-wise fragmentation of glycosphingolipid molecules for structural analysis in comparison to chemically synthesized standards.
09:05
Balance and Coordination Testing
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2023
Balance and coordination are critical components involved in the control of movement. Many sensory receptors and neural processing units are required to help individuals maintain balance while performing various activities. Deficits in balance and coordination occur in patients suffering from movement disorders or due to aging. Therefore, scientists are trying to understand the pathophysiology behind these conditions. One way to do that is by using rodent models and testing them on behavioral...
FAQs
The analysis compares the amount introduced with measured amounts recovered in collected samples, amounts transformed into metabolites, and material retained within the system. Concentration measurements are combined with the corresponding sample volumes to estimate each component. This accounting framework helps investigators determine whether the observed disposition of a compound is sufficiently explained by the measured data.
Concentration alone does not indicate the total amount present in a sample. Investigators use the measured concentration together with the sample volume to estimate the amount recovered in that matrix. Applying this calculation across blood, urine, feces, or other relevant matrices allows results to be compared on an amount basis, reducing the risk of misinterpreting concentration changes as disposition changes.
Following metabolites distinguishes material that remains as the administered compound from material that has been transformed. This distinction is important because recovery of the parent compound alone may not describe the full disposition of the dose. Metabolite measurements therefore support metabolite characterization and help connect observed sample findings with the compound’s overall handling in the body.
Sample selection depends on which aspects of the compound’s disposition investigators need to evaluate. Blood, urine, feces, and other relevant biological matrices can provide measurements of the administered compound and its metabolites. Combining data from multiple specimens allows investigators to estimate recovery and disposition more comprehensively than measurements from a single biological matrix.
Investigators begin by tracking the administered compound, collect relevant biological samples, and measure the concentrations of the compound and its metabolites. They then combine those measurements with sample volumes to estimate amounts recovered, transformed, or retained. Comparing these quantities provides a quantitative disposition profile that can be used in pharmacokinetic and absorption, distribution, metabolism, and excretion studies.
Results can inform dose selection, clarify which metabolites require characterization, and contribute to safety assessment. By showing how the body handles an administered drug, the analysis also supplies evidence relevant to pharmacokinetic and absorption, distribution, metabolism, and excretion evaluations. These findings may support regulatory decisions when investigators need a quantitative account of recovery and disposition.