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Related Concept Videos

Turbulent Flow01:24

Turbulent Flow

Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent spots,...
Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
Total Internal Reflection Fluorescence Microscopy01:05

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Three-Dimensional Microscopy in Microbiology01:28

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Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
Imaging Biological Samples with Optical Microscopy01:18

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Laminar and Turbulent Flow01:07

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Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the streamlines...

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Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
10:53

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

Published on: March 12, 2019

Turbulence under the microscope.

J K Liu1, G H Deng, Z T Yuan

  • 1Research Center of Bio-wavees, Third Military Medical University, Chongqing, 400038 P.R. of China.

Journal of Biological Physics
|January 25, 2013
PubMed
Summary
This summary is machine-generated.

Researchers observed a new biological micro-turbulence in Proteus mirabilis micro-cultures. This self-controlling process exhibits a hollow effect and temperature-dependent behavior, offering a novel model for fluid dynamics research.

Keywords:
Bacterial movementchaoscryptic growth cellproteusmirabilisturbulence

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Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
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Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

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Area of Science:

  • Microbiology
  • Fluid Dynamics
  • Biophysics

Background:

  • Turbulence is a complex phenomenon with significant implications in various scientific fields.
  • Understanding biological influences on fluid dynamics is crucial for physiological studies.

Purpose of the Study:

  • To observe and characterize a novel form of turbulence generated by biological effects, termed biological micro-turbulence.
  • To explore the underlying processes and controlling factors of this micro-turbulence.

Main Methods:

  • Micro-culturing of Proteus mirabilis (CGCs) to induce specific movement patterns.
  • Comparative analysis with control trials to determine influencing factors.
  • Microscopic observation of the resulting micro-organic suspension.

Main Results:

  • Observed turbulence was predominantly mass-based but exhibited partial regularity.
  • Confirmed the occurrence of a hollow effect within the micro-turbulence.
  • Identified temperature-dependent initiation and self-regulation of suspension quantity.

Conclusions:

  • Biological micro-turbulence is a spontaneous and self-controlling process.
  • This phenomenon provides a controllable experimental model for turbulence studies.
  • Offers new avenues for researching the mechanisms and physiological functions of bodily fluid flow.