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Related Concept Videos

Regulation of Sodium and Potassium01:26

Regulation of Sodium and Potassium

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The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily...
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Roles of Electrolytes: Sodium and Potassium01:24

Roles of Electrolytes: Sodium and Potassium

2.1K
Sodium plays a crucial role in maintaining fluid and electrolyte balance and overall bodily homeostasis. Sodium balance is primarily regulated by kidney function, which adjusts sodium elimination to match dietary intake and maintain proper electrolyte levels. Sodium is the most abundant cation in the extracellular fluid (ECF) and is found in salts such as sodium chloride (NaCl) and sodium bicarbonate (NaHCO3). Although cellular plasma membranes are relatively impermeable to sodium, its role in...
2.1K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

16.8K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
16.8K
Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

2.3K
Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
2.3K
Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

691
Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
691
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers01:12

Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers

2.2K
Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
2.2K

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Fabrication and Characterization of Superconducting Resonators
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Superconductivity in Potassium-Intercalated T

Li Zhu1, Qi-Yuan Li1, Yang-Yang Lv2

  • 1National Laboratory of Solid State Microstructures, School of Physics , Nanjing University , Nanjing 210093 , China.

Nano Letters
|September 19, 2018
PubMed
Summary
This summary is machine-generated.

Researchers discovered superconductivity in potassium-intercalated WTe2, a type II Weyl semimetal. This finding suggests KxWTe2 is a promising candidate for exploring topological superconductors and their quantum computation applications.

Keywords:
SuperconductivityWTe2electrical transportintercalationscanning tunneling microscopy

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Computing

Background:

  • Topological superconductors are highly sought after for their potential in quantum computation.
  • Type II Weyl semimetals like WTe2 are candidates for hosting exotic electronic states.

Purpose of the Study:

  • To investigate the possibility of inducing superconductivity in WTe2 through potassium intercalation.
  • To characterize the superconducting properties and coexistence with other electronic states in KxWTe2.

Main Methods:

  • Potassium (K) intercalation into the van der Waals gap of WTe2.
  • Electrical transport measurements to detect superconductivity.
  • Scanning tunneling spectroscopy (STS) for electronic characterization.
  • Structural analysis to assess lattice changes.

Main Results:

  • Superconducting state discovered in potassium-intercalated WTe2 (KxWTe2).
  • Observed anisotropic superconducting behavior.
  • Uncovered coexistence of superconductivity with a positive magnetoresistance state.
  • Structural analysis revealed negligible lattice expansion, preserving the topological nontrivial state.

Conclusions:

  • KxWTe2 exhibits superconductivity with potential topological properties.
  • This material is a promising candidate for the realization of topological superconductors.
  • Further research into KxWTe2 could advance quantum computation technologies.