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Related Concept Videos

Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

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Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
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Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
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To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
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Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
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The blood in our bodies comprises three major components: blood plasma, formed elements, and the extracellular matrix. Blood plasma is a yellowish fluid that constitutes 55% of the total blood volume. It is primarily made up of water and essential substances such as electrolytes and proteins. Blood plasma serves as a medium for transporting blood cells and also contains nutrients, enzymes, hormones, antibodies, and gases.
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Generation of Alginate Microspheres for Biomedical Applications
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A Sample Preparation Technique Using Biocompatible Composites for Biomedical Applications.

Huifang Liu1,2, Geun Su Noh3,4, Yange Luan5,6

  • 1Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea. liuhuifang.1229@gmail.com.

Molecules (Basel, Switzerland)
|April 17, 2019
PubMed
Summary

A new composite material enhances pathogen capture for faster, more sensitive infectious disease diagnostics. This innovation improves nucleic acid preparation, aiding in early detection and public health surveillance.

Keywords:
enrichmentnanocompositenucleic acid isolationpathogenicsample preparation

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Area of Science:

  • Biotechnology
  • Materials Science
  • Microbiology

Background:

  • Pathogenic infections pose a significant global public health challenge.
  • Sensitive diagnostics require efficient enrichment of bacteria from complex samples.
  • Current methods for pathogen concentration can be slow and lack biocompatibility.

Purpose of the Study:

  • To develop a novel composite material for rapid and efficient pathogen enrichment.
  • To enable in situ nucleic acid preparation from enriched pathogens and cells.
  • To improve the sensitivity of diagnostic systems for infectious diseases.

Main Methods:

  • Fabrication of a cucurbit[6]uril (CB) supermolecular decorated amine-functionalized diatom (DA) composite (CB-DA).
  • Evaluation of the CB-DA composite's pathogen absorption rate and efficiency.
  • Assessment of nucleic acid recovery and real-time PCR performance using the CB-DA enrichment system.

Main Results:

  • The CB-DA composite demonstrated approximately 90% capture efficiency for Escherichia coli within 3 minutes at 10⁶ CFU/mL.
  • Nucleic acid samples recovered using the CB-DA system showed a four-fold increase in early amplification signal strength in real-time PCR.
  • The composite facilitated efficient sample enrichment and in situ nucleic acid preparation.

Conclusions:

  • The developed CB-DA composite offers a rapid, efficient, and biocompatible solution for pathogen enrichment.
  • This technology enhances nucleic acid preparation, potentially improving the sensitivity of diagnostic assays.
  • The CB-DA system shows promise for advancing infectious disease diagnostics and public health monitoring.