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Related Concept Videos

Catalysis02:50

Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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Translation01:31

Translation

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Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
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Translation01:31

Translation

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are...
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Initiation of Translation02:33

Initiation of Translation

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Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
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Termination of Translation01:44

Termination of Translation

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The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
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The Sense of Self: Reflected Self-Appraisal and Social Comparison02:57

The Sense of Self: Reflected Self-Appraisal and Social Comparison

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According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
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Translating Catalysis to Chemiresistive Sensing.

Vera Schroeder1, Timothy M Swager1

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This study introduces novel single-walled carbon nanotube (SWCNT) sensors for detecting acrylates. These sensors leverage catalytic principles for high selectivity in complex environments.

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Area of Science:

  • Chemical Engineering
  • Materials Science
  • Analytical Chemistry

Background:

  • Transition-metal catalysis aims for chemoselective activation in complex settings.
  • Catalytic systems and substrate interactions are key for selective sensors, mirroring enzymatic processes.

Purpose of the Study:

  • To translate organometallic catalytic reactions into sensing capabilities.
  • To develop highly selective chemiresistive sensors for acrylate detection.

Main Methods:

  • Developed single-walled carbon nanotube (SWCNT) chemiresistive sensors.
  • Adapted aerobic oxidative Heck reaction conditions for sensor operation.
  • Utilized catalytic reaction system to modulate carbon nanotube doping levels.

Main Results:

  • Achieved highly selective detection of acrylates.
  • Sensors demonstrated responsiveness to electron-deficient alkenes.
  • Detected acrylates at parts per million (ppm) levels in untreated air.

Conclusions:

  • Successfully translated organometallic reactions into sensing applications.
  • The developed sensors offer a novel approach for selective acrylate detection.
  • The presented concepts are broadly applicable for future sensor development based on catalysis.