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Related Concept Videos

Rise of Liquid in a Capillary Tube01:18

Rise of Liquid in a Capillary Tube

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When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
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Surface Tension, Capillary Action, and Viscosity02:57

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Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
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Capillary Beds01:20

Capillary Beds

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Capillary beds are networks of tiny blood vessels that play a crucial role in the circulatory system. These beds are where the exchange of gases, nutrients, and waste products occurs between the blood and surrounding tissues. Each capillary bed consists of numerous capillaries, which are the smallest blood vessels in the body, typically only one cell-thick. This thinness allows for the efficient diffusion of substances.
Capillaries connect arterioles, small branches of arteries, to venules,...
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Capillary Exchange01:28

Capillary Exchange

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The cardiovascular system's chief role is to disseminate gases, nutrients, waste, and other substances to the body's cells. Small molecules like gases, lipids, and lipid-soluble substances directly diffuse through capillary wall endothelial cell membranes. Glucose, amino acids, and ions, including sodium, potassium, calcium, and chloride, use transporters for facilitated diffusion via membrane-specific channels. Glucose, ions, and bigger molecules may also pass through intercellular...
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Capillaries and Their Types01:20

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Capillaries, a crucial constituent of the circulatory system, are diminutive vessels with a diameter between 5–10 micrometers, accommodating perfusion to the tissues through the phenomenon known as microcirculation. Through their permeable walls, consisting of an endothelial layer ensconced by a basement membrane and sporadically dispersed smooth muscle fibers, the exchange of substances between the blood and the interstitial fluid becomes plausible. Variance in wall composition exists,...
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Capillary Electrophoresis: Instrumentation01:20

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Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
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Visual Detection of Multiple Nucleic Acids in a Capillary Array
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High resolution, high efficiency liquid scintillator capillary array for gamma imaging.

Mei Zhang1, Huasi Hu1, Kuinian Li2

  • 1School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

The Review of Scientific Instruments
|August 3, 2018
PubMed
Summary
This summary is machine-generated.

A novel liquid scintillator capillary array (LSCA) offers superior temporal and spatial resolution for gamma imaging. This 1D detector system, when paired with a streak camera, shows promise for advanced radiation detection applications.

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Area of Science:

  • Nuclear Instrumentation
  • Radiation Detection Physics

Background:

  • Pulsed gamma radiation detection requires high temporal and spatial resolution.
  • Existing detector systems may have limitations in achieving optimal resolution.

Purpose of the Study:

  • To develop a one-dimensional detector system for high-resolution pulsed gamma radiation detection.
  • To evaluate the performance of a liquid scintillator capillary array (LSCA) coupled with a streak camera.

Main Methods:

  • Fabrication of a liquid scintillator capillary array (LSCA).
  • Performance evaluation through simulation and experimental measurements.
  • Application of a slanted edge algorithm to determine the edge spread function and modulation transfer function (MTF).

Main Results:

  • The LSCA exhibited maximum emission efficiency at 420 nm.
  • Simulations indicated better spatial resolution for 14 MeV neutrons compared to 1.25 MeV gamma radiation.
  • Experimental results demonstrated higher temporal and spatial resolution for the LSCA compared to a 6-mm LaBr3 image plate, with a spatial resolution of 1.1 lp/mm (MTF = 0.1).

Conclusions:

  • The LSCA, when coupled with an ultra-violet streak camera, provides high temporal and spatial resolution for gamma detection.
  • The developed detector system demonstrates comparable sensitivity to existing technologies like LaBr3 image plates.
  • The LSCA represents a promising advancement in one-dimensional detector systems for pulsed gamma radiation imaging.