Purity Effects
Purity Effects - Related Videos
12:17
Detection and Isolation of Apoptotic Bodies to High Purity
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Cited by 29 •
2018
A workflow using flow cytometry or differential centrifugation is developed to detect, quantify and isolate apoptotic bodies from an apoptotic sample to high purity.
12:06
Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants
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Cited by 6 •
2017
A protocol for the synthesis of high purity nonsymmetric dialkylphosphinic acid extractants is presented, taking (2,3-dimethylbutyl)(2,4,4'-trimethylpentyl)phosphinic acid as an example.
07:54
Rapid and Refined CD11b Magnetic Isolation of Primary Microglia with Enhanced Purity and Versatility
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Cited by 22 •
2017
Here, we present a protocol to isolate microglia from postnatal mouse pups (day 1) for in vitro experimentation. This improvised method of isolation generates both high yield and purity, a significant advantage over alternate methods that allows broad range experimentation for the purposes of elucidating microglial biology.
08:02
Determination of Immune Cell Identity and Purity Using Epigenetic-Based Quantitative PCR
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Cited by 1 •
2020
Here we describe a robust method of determining immune cell identity and purity through epigenetic signatures detected using quantitative PCR (qPCR). DNA demethylation at a specific locus serves as a unique identifier for a particular cell type and allows for identification of CD8+, regulatory, or Th17 T cells.
06:34
A Tailored HPLC Purification Protocol That Yields High-purity Amyloid Beta 42 and Amyloid Beta 40 Peptides, Capable of Oligomer Formation
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Cited by 6 •
2017
Herein we report a tailored HPLC purification protocol that yields high-purity amyloid beta 42 (Aβ42) and amyloid beta 40 (Aβ40) peptides, capable of oligomer formation. Amyloid beta is a highly aggregation prone, hydrophobic peptide implicated in Alzheimer's disease. The amyloidogenic nature of the peptide makes its purification a challenge.
FAQs
Impurities can reduce the effective concentration of the intended reactive species, creating a dilution effect. They may also participate in competing reactions or disturb the balance of a chemical equilibrium. These changes can alter reaction rates and product yields, so observed behavior may reflect both the target substance and the chemical contributions of unwanted components.
Impurities can modify physical properties by disrupting the regular arrangement of particles in a crystal lattice or by changing the composition of the material being measured. As a result, melting point, boiling point, and solubility may differ from values expected for a purer substance. These shifts provide useful evidence when characterizing material quality.
A measured composition may not represent the intended substance alone when impurities are present. Dilution, competing chemical behavior, and altered physical properties can all influence experimental observations. Analysts therefore need to consider sample purity when interpreting results, because an unexpected value may arise from contamination rather than from a genuine difference in the target material.
Begin by assessing the reagent or product and comparing its measured properties or composition with the expected behavior of the intended substance. Examine whether dilution, competing reactions, equilibrium shifts, or crystal-lattice disruption could explain discrepancies. The findings then guide selection of a suitable purification method and help determine whether additional analysis is needed.
They are especially important when impurities can consume reactive species, introduce competing reactions, or change equilibrium conditions. Such effects may reduce product yield and make repeated syntheses less consistent. Monitoring purity helps researchers distinguish problems in the reaction itself from problems caused by the starting materials or isolated product, supporting more reproducible synthetic work.
Pharmaceutical quality control requires reliable assessment of reagent and product composition, while material characterization depends on interpreting physical and chemical measurements accurately. Impurities can shift properties or produce misleading results in either setting. Studying these effects helps determine whether a sample meets the expected quality and supports more dependable conclusions about its composition and behavior.