Selective Extraction
Selective Extraction - Related Videos
04:00
Immunoaffinity Based Extraction of Ubiquitinylated Peptides: A Technique to Selectively Extract Ubiquitin Tagged Peptides from Purified Peptide Fractions
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2023
This video describes a method to extract and purify ubiquitinylated peptides containing remnant di-glycine peptides from a complex peptide mixture. The presented method may help in identifying original ubiquitination sites in the protein.
02:55
Extraction - Concepts
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2020
Extraction Extraction is a common technique used in organic chemistry to isolate a target compound. In the extraction process, a solute is transferred from one phase to another to separate it from unreacted starting materials or impurities. Extraction is also used to facilitate the isolation of a solute from a reaction solvent that is difficult to remove by evaporation, such as a solvent with a high boiling point. Generally, there are three types of extractions. First, in solid-liquid...
06:48
Natural Selection - Concepts
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2019
Fitness Widespread variation of phenotypes in natural populations provides the raw material for evolution, which is the change in the inherited traits of populations over successive generations. Natural selection is one of the main mechanisms of evolution and requires variable traits to be heritable and associated with differential survival and/or reproductive success. Phenotypes that correlate with greater success will have more offspring that survive to reproduce in the next generation, and...
03:14
Artificial Selection - Concepts
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2019
Natural Selection and Adaptive Evolution In natural settings, adaptive evolution takes place by natural selection, a process in which differences in traits lead to differences in survival and reproductive success between individuals. This happens because individuals with certain phenotypes have a higher probability of survival and/or produce more surviving offspring than individuals with other phenotypes. A classic example of this was demonstrated by Rosemary and Peter Grant studying the...
06:42
Extraction of Biomarkers from Sediments - Accelerated Solvent Extraction
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2023
Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst The distribution of a group of organic biomarkers called glycerol-dialkyl glycerol-tetraethers (GDGTs), produced by a suite of archaea and bacteria, were found in modern sediments to change in a predictable manner in response to air or water temperature1,2. Therefore, the distribution of these biomarkers in a sequence of sediments of known age can be used to reconstruct the evolution of air and/or water temperature on...
FAQs
The outcome depends on the contrast between the target compound and the surrounding mixture. A chosen solvent or binding phase must interact more favorably with the target than with competing substances, based on properties such as solubility, polarity, affinity, or adsorption. Greater contrast can improve separation efficiency and leave fewer unwanted components in the recovered fraction.
Solubility and polarity influence which phase preferentially retains a substance, while affinity describes a stronger chemical preference for a particular binding phase. Adsorption provides another basis for selective retention. Matching the dominant chemical property to the solvent or binding material helps isolate metals, organic pollutants, nutrients, or other constituents from environmental mixtures.
Selectivity reduces interference from substances that accompany the target in soil, water, or sediment. This is important because unwanted components can complicate identification or affect the interpretation of measured contaminants and nutrients. By concentrating the relevant constituent while leaving more of the surrounding material behind, the method supports clearer analysis and more efficient separation.
A typical workflow identifies the substance of interest, considers its relevant chemical properties, and chooses a solvent or binding phase that favors its transfer or retention. The environmental sample is then brought into contact with that phase, after which the target-containing fraction is separated from the remainder. The resulting fraction can support analysis, treatment, or recovery.
The approach applies to complex samples such as soil, water, and sediment. Depending on the chemical behavior used for separation, it can target metals, organic pollutants, nutrients, and other constituents. This range makes selective extraction useful for both environmental measurements and strategies that require a particular substance to be isolated from naturally mixed sample components.
In remediation, targeted separation can help focus treatment on particular contaminants rather than the entire mixture. In resource recovery, it can help isolate valuable materials from surrounding components. Improving separation efficiency and reducing interference makes these operations more targeted, while the selected solvent or binding phase determines which substance is preferentially transferred or retained.