Lipid Quantification
Lipid Quantification - Related Videos
03:59
High-Performance Thin Layer Chromatography: A Technique for Preliminary Separation and Quantification of Lipids From Neutrophils
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2025
This video demonstrates a technique for the preliminary separation and quantification of lipids from human peripheral blood-derived neutrophils. This technique helps in the initial evaluation of target analytes before proceeding with HPLC.
07:55
Chemical Isolation, Quantification, and Separation of Skin Lipids from Reptiles
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Cited by 6 •
2019
In reptiles, skin lipids from conspecifics are crucial for sexual signaling, with potential use in invasive species management. Here, we describe protocols for extracting skin lipids from shed skin or whole animals, determining and analyzing the total lipid mass, and separating the lipids using fractionation via column chromatography.
07:46
Quantification of Lipid Abundance and Evaluation of Lipid Distribution in Caenorhabditis elegans by Nile Red and Oil Red O Staining
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Cited by 121 •
2018
Nile red staining of fixed Caenorhabditis elegans is a method for quantitative measurement of neutral lipid deposits, while oil red O staining facilitates qualitative assessment of lipid distribution among tissues.
03:38
Structure of Lipids
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2020
Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic birds and...
02:57
Isolation of Lipids from Human Blood-Derived Neutrophils by Biphasic Separation
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2025
This video demonstrates lipid isolation from human neutrophils by a biphasic solvent system using methanol and chloroform.
FAQs
Method selection determines whether the result represents total lipid content or a profile of individual lipid classes and molecular species. Colorimetric and fluorescent assays can support measurements of overall lipid amounts, whereas chromatography or mass spectrometry can provide more detailed compositional information. The appropriate choice therefore depends on whether the study requires broad comparison or molecular-level characterization.
Calibration standards provide a reference for relating an assay or instrument measurement to lipid amount or concentration. Including them helps researchers interpret sample signals consistently and compare results across biological conditions. Without an appropriate standard-based measurement framework, differences between samples may be more difficult to evaluate quantitatively, particularly when assessing changes in metabolism, disease mechanisms, or drug responses.
Extraction separates lipids from cells, tissues, or biological fluids so they can be analyzed by the selected assay or instrument. This preparation step connects the original biological sample with the later measurement of total content or specific lipid species. The resulting data can then be used to examine membrane composition, energy storage, or signaling-related changes under different conditions.
Colorimetric and fluorescent assays are useful when the goal is to measure lipid amounts through an assay-based readout, often emphasizing total content. Chromatography and mass spectrometry are selected when researchers need profiles of lipid classes or molecular species. Thus, the main distinction is the level of compositional detail produced, rather than simply the presence or absence of lipid measurement.
A typical workflow begins with a biological sample such as cells, tissue, or fluid, followed by lipid extraction. The extracted material is then measured using a colorimetric or fluorescent assay, chromatography, or mass spectrometry, commonly with calibration standards. Researchers compare the resulting measurements across samples or experimental conditions to identify changes in lipid content or composition.
Biologists apply these measurements to investigate metabolism, membrane composition, energy storage, and cellular signaling. They can compare lipid changes across experimental conditions, examine disease mechanisms, evaluate nutritional effects, or assess responses to drugs. Depending on the analytical method, the outcome may show broad shifts in total lipid content or more specific changes among lipid classes and molecular species.