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Related Concept Videos

P-N junction01:11

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Two vectors can be multiplied using a scalar product or a vector product. The resultant of a scalar product is scalar, while with vector products, the resultant is a vector. These rules of the scalar or vector product between two vectors can be applied to multiple vectors to obtain meaningful combinations. The scalar triple product is the dot product of a vector with the cross product of two vectors.
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Biological organization is the classification of biological structures, ranging from atoms at the bottom of the hierarchy to the Earth's biosphere. Each level of the hierarchy represents an increase in complexity that builds upon the previous level.
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The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
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Anchoring Junctions01:03

Anchoring Junctions

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Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
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Adherens Junctions01:24

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
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Triple-Junction Optoelectronic Sensor with Nanophotonic Layer Integration for Single-Molecule Level Decoding.

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  • 1Personal Genomics, Inc. , Hsinchu Biomedical Science Park , Zhubei , Hsinchu 30261 , Taiwan.

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|March 12, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a new DNA sequencing device using a triple-junction photodiode (TPD) CMOS sensor. This innovation overcomes charge-coupled device (CCD) imaging bottlenecks for faster, more accurate DNA sequencing.

Keywords:
CMOSfiltergratingnanophotonic layerplanar waveguidetriple-junction photodiode (TPD)

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Area of Science:

  • Optoelectronics
  • Biotechnology
  • Genomics

Background:

  • Traditional Sanger sequencing is being replaced by next-/third-generation methods.
  • Sequencing by synthesis using charge-coupled device (CCD) imaging faces throughput limitations due to large pixel footprints per reaction site.
  • Current research focuses on integrating nanophotonic layers onto CMOS detectors to enhance DNA sequencing performance.

Purpose of the Study:

  • To develop a miniaturized and accelerated DNA sequencing platform.
  • To overcome the bandwidth limitations of CCD imaging in DNA sequencing by synthesis.
  • To enable real-time illumination and detection of fluorescent molecules in DNA sequencing.

Main Methods:

  • Development of a custom integrated optoelectronic device.
  • Utilizing a triple-junction photodiode (TPD) CMOS sensor.
  • Integration with NPL (National Physical Laboratory) technology for enhanced detection.

Main Results:

  • The custom device integrates nanophotonic layers directly onto a CMOS detector.
  • Achieved alignment of one reaction site to a few pixels, reducing detector real estate.
  • Enabled real-time illumination and detection of fluorescent molecules for DNA sequencing.

Conclusions:

  • The developed TPD-CMOS sensor integrated with NPL technology offers a pathway to overcome CCD imaging bottlenecks in DNA sequencing.
  • This approach minimizes sequencing platform size and accelerates processing procedures.
  • The integrated optoelectronic device shows potential for advancing rapid and robust DNA sequencing technologies.