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A tracheostomy is a surgical procedure that creates an artificial opening into the trachea, typically at the second or third cartilaginous ring level. This opening allows the insertion of a tracheostomy tube, which can replace an endotracheal tube, provide mechanical ventilation, bypass an upper airway obstruction, or remove accumulated tracheobronchial secretions.
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When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
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Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
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Related Experiment Video

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A Matrigel-Based Tube Formation Assay to Assess the Vasculogenic Activity of Tumor Cells
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Photodegradation using TiO2-activated borosilicate tubes.

Samer Khalaf1,2, Jawad H Shoqeir3, Laura Scrano4

  • 1Department of Science, University of Basilicata, 85100, Potenza, Italy. skhalaf@staff.alquds.edu.

Environmental Science and Pollution Research International
|August 18, 2018
PubMed
Summary
This summary is machine-generated.

Titanium dioxide (TiO2) on borosilicate tubes effectively degrades persistent organic pollutants like NSAIDs and herbicides. The sol-gel coating method significantly outperforms nanoparticle/PECVD for faster pollutant removal in water treatment.

Keywords:
AOPsBorosilicate tubesEmerging contaminantsIbuprofenMCPAMefenamic acidPECVDPhoto-degradationPhotocatalysisSol-gel coatingTiO2Wastewater

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Area of Science:

  • Environmental Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Persistent organic pollutants (POPs), including NSAIDs and herbicides, pose significant environmental challenges.
  • Conventional water treatment methods often struggle with the complete removal of these recalcitrant compounds.
  • Titanium dioxide (TiO2) photocatalysis is a promising advanced oxidation process for pollutant degradation.

Purpose of the Study:

  • To investigate the photocatalytic activity of TiO2 supported on borosilicate tubes for POP removal from water.
  • To compare the efficiency of two different TiO2 coating methods: sol-gel and nanoparticle/PECVD.
  • To evaluate the performance of heterogeneous photocatalysis versus direct photolysis.

Main Methods:

  • Borosilicate tubes were coated with TiO2 using sol-gel dip-coating and a hybrid nanoparticle dip-coating/PECVD process.
  • A continuous flow photochemical reactor was used for photodegradation experiments under simulated solar light.
  • Kinetic studies were performed to analyze the degradation rates of ibuprofen, mefenamic acid, and MCPA.

Main Results:

  • Direct photolysis showed poor efficiency for NSAID removal.
  • Heterogeneous photocatalysis using TiO2-coated tubes achieved complete decomposition of target pollutants.
  • The sol-gel coating method demonstrated significantly faster degradation rates compared to the nanoparticle/PECVD method.

Conclusions:

  • TiO2 supported on borosilicate tubes is an effective heterogeneous photocatalyst for POP removal, avoiding post-separation issues.
  • The sol-gel coating technique offers superior performance for pollutant degradation.
  • This approach shows potential for optimizing large-scale water treatment applications.