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Related Concept Videos

Determining the Plane of Cell Division02:13

Determining the Plane of Cell Division

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Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function. 
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
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Formation of the Platelet Plug01:22

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The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
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Mitosis and Cytokinesis02:03

Mitosis and Cytokinesis

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In eukaryotes, the cell division cycle is divided into distinct, coordinated cellular processes that include cell growth, DNA replication/chromosome duplication, chromosome distribution to daughter cells, and finally, cell division. The cell cycle is tightly regulated by its regulatory systems as well as extracellular signals that affect cell proliferation.
The processes of the cell cycle occur over approximately 24 hours (in typical human cells) and in two major distinguishable stages. The...
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Electric Field of Parallel Conducting Plates01:16

Electric Field of Parallel Conducting Plates

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Gauss' law relates the electric flux through a closed surface to the net charge enclosed by that surface. Gauss's law can be applied to find the electric field and the charge enclosed in a region depending on its charge distribution.
Consider a cross-section of a thin, infinite conducting plate having a positive charge. For such a large thin plate, as the thickness of the plate tends to zero, the positive charges lie on the plate's two large faces. Without an external electric...
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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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Anaphase A and B01:39

Anaphase A and B

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Microtubules form through the end-to-end polymerization of tubulin heterodimers. Kinetochore microtubules originate from the spindle poles, and their plus-ends connect with the kinetochores on sister-chromatids. Ndc80 protein complexes, present on the kinetochore, form low-affinity links with the plus end of these kinetochore microtubules.
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Updated: Jul 5, 2025

Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
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Tectonic plate under Tibet may be splitting in two.

Maya Wei-Haas

    Science (New York, N.Y.)
    |January 11, 2024
    PubMed
    Summary

    The Indian Plate is splitting apart, potentially altering earthquake risks. This geological shift may influence seismic activity and hazard assessments in the region.

    Area of Science:

    • Geophysics and Tectonics
    • Seismology

    Background:

    • The Indian Plate's tectonic activity is a key factor in regional seismicity.
    • Recent analyses suggest a fragmentation of the Indian Plate.

    Discussion:

    • The ongoing rifting and separation of the Indian Plate can lead to complex stress redistribution.
    • This process may alter the location, magnitude, and frequency of earthquakes.

    Key Insights:

    • Evidence indicates the Indian Plate is undergoing significant internal deformation.
    • This deformation directly impacts the assessment of current and future earthquake hazards.

    Outlook:

    • Further research is needed to model the precise effects of plate fragmentation on seismic hazards.
    • Updated hazard models incorporating these findings are crucial for infrastructure and public safety.

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