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Bernoulli's Principle: Applications01:17

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There are many devices and situations in which fluid flows at a constant height and so can be analyzed using Bernoulli's principle. These devices include, but are not limited to, entrainment devices and fluid flow measuring devices.
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Archimedes' principle is fundamental in analyzing the buoyant force and stability of floating bodies. In this example, a wooden block with a rectangular section floats in seawater. Based on the block's dimensions, its specific gravity and the specific weight of seawater are used to find the volume of water displaced and the center of buoyancy.
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The Uncertainty Principle04:08

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Using Laser Scanning Microscopy to Determine Electromigration in Molybdenum Disilicide
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Laser scanning cytometry: principles and applications.

Piotr Pozarowski1, Elena Holden, Zbigniew Darzynkiewicz

  • 1The Brander Cancer Research Institute, New York Medical College, Valhalla, NY, USA.

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Summary
This summary is machine-generated.

The laser scanning cytometer (LSC) offers advanced cell analysis by measuring fluorescence in individual cells. This versatile microscope-based cytofluorometer has numerous applications in biological and clinical research.

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Area of Science:

  • Cell biology
  • Cytometry
  • Biotechnology

Background:

  • The laser scanning cytometer (LSC) is a sophisticated microscope-based cytofluorometer.
  • It enables high-sensitivity, high-accuracy measurement of multi-laser excited fluorescence from individual cells at rapid speeds (up to 5000 cells/min).

Purpose of the Study:

  • To review the diverse analytical capabilities and applications of the LSC.
  • To compare the advantages and limitations of LSC with traditional flow cytometry.

Main Methods:

  • Multilaser excitation and measurement of fluorescence emission spectra from individual cells.
  • Application of LSC in various biological assays, including cell cycle analysis, molecular translocation studies, mutagenicity testing, FISH, and immunophenotyping.

Main Results:

  • LSC facilitates identification of cells based on chromatin condensation, detection of regulatory molecule translocations, and semiautomatic scoring of micronuclei.
  • It is applicable to nucleoli enumeration, clonogenicity assays, cell immunophenotyping, and analysis of tissue sections and hypocellular samples.

Conclusions:

  • The LSC provides a powerful platform for detailed cellular analysis with broad applications in research and clinical settings.
  • Its capabilities extend to time-resolved processes, imaging, and analysis of challenging sample types, offering distinct advantages over flow cytometry in specific contexts.