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Related Concept Videos

Transport Number01:31

Transport Number

The transport number is the fraction of the total current carried by an ion in an electrolyte solution. It is defined as the ratio of the current carried by a specific ion to the total current flowing through the solution. The transport number, t, is central to understanding ionic mobility, which describes how fast an ion moves under the influence of an electric field. This link connects the physical behavior of ions in solution to the chemical processes that occur during electrochemical...
IP3/DAG Signaling Pathway01:11

IP3/DAG Signaling Pathway

Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and produces two-second...
Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the rated...
Directional Relays01:25

Directional Relays

Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
Social Traps01:41

Social Traps

Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned more cows, the larger...
Derivatives of Inverse Trigonometric Functions01:30

Derivatives of Inverse Trigonometric Functions

A ship tracking an approaching aircraft relies on geometric measurements to find out the aircraft’s position relative to the observer. By measuring the slant distance to the aircraft and the angle of elevation, the horizontal and vertical components of the distance can be obtained using trigonometric relationships. This geometric approach provides a basis for analyzing how the observed angle changes as the aircraft moves closer to the ship.To examine the mathematical behavior of the angle of...

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Related Experiment Video

Updated: Jun 22, 2026

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

Delta traffic takes a sh-Arp turn.

Eyal D Schejter

    Nature Cell Biology
    |July 2, 2009
    PubMed
    Summary

    The Notch pathway relies on Delta ligand trafficking, which is guided by actin polymerization. This process ensures Notch receptor activation in neighboring cells.

    Area of Science:

    • Cell biology
    • Molecular biology
    • Biochemistry

    Background:

    • The Notch signaling pathway is crucial for cell-cell communication and developmental processes.
    • Delta, a transmembrane ligand, cycles through signal-sending cells to activate the Notch receptor on adjacent cells.

    Discussion:

    • This study investigates the role of actin polymerization in Delta trafficking within the Notch pathway.
    • The Arp2/3 complex is identified as a key regulator of actin dynamics involved in this process.

    Key Insights:

    • Arp2/3-dependent actin polymerization is essential for the internalization and re-establishment of Delta on the cell surface.
    • This actin-driven mechanism ensures efficient Notch receptor activation.

    Outlook:

    Related Experiment Videos

    Last Updated: Jun 22, 2026

    Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
    11:41

    Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

    Published on: February 1, 2020

    • Further research can explore the precise molecular mechanisms linking Arp2/3 to Delta trafficking.
    • Understanding this pathway could offer insights into developmental disorders and cancer therapies.