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Related Concept Videos

Circuit Terminology01:14

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An electrical network is a system composed of interconnected elements, such as resistors, capacitors, inductors, and voltage or current sources. Unlike a circuit, an electrical network does not necessarily form a closed path. In other words, while all circuits can be considered networks due to their interconnected nature, not every network qualifies as a circuit.
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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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LC Circuits01:21

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An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
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ICUS/CCUS/CHIP: basics & beyond.

Mili Jain1, Anil Tripathi1

  • 1a Pathology Department , King George's Medical University , Lucknow , Uttar Pradesh , India.

Expert Review of Hematology
|August 24, 2017
PubMed
Summary
This summary is machine-generated.

Idiopathic cytopenia of undetermined significance (ICUS) and related conditions present diagnostic challenges. Mutation analysis offers insights, but caution is needed due to clonal somatic mutations in healthy individuals.

Keywords:
CCUSCHIPICUSclonal cytopeniaidiopathic cytopenia

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Area of Science:

  • Hematology
  • Genetics
  • Oncology

Background:

  • Idiopathic cytopenia with non-diagnostic marrow morphology and normal karyotype poses diagnostic and therapeutic challenges.
  • Mutation analysis can provide crucial clinical insights for these challenging cases.

Observation:

  • Clonal somatic mutations have been documented in healthy elderly individuals, necessitating careful interpretation.
  • Distinguishing between malignant proliferation and the aging process based on clonality requires careful judgment.

Findings:

  • The review covers defining criteria and diagnostic workup for Idiopathic cytopenia of undetermined significance (ICUS), Clonal cytopenia of undetermined significance (CCUS), and Clonal hematopoiesis of indeterminate potential (CHIP).
  • Current evidence does not support using somatic mutations as definitive evidence for myelodysplastic syndrome (MDS).

Implications:

  • Further insight into the natural disease course is needed to categorize CCUS under MDS.
  • Longitudinal studies on ICUS, CCUS, and CHIP may elucidate the pathological significance of clonal mutations.
  • Absence of mutations may serve as a favorable predictor for not having MDS.