Particle Dynamics
Particle Dynamics - Related Videos
02:14
Tracking Aggregation of Virus-Like Particles Using Dynamic Light Scattering
0 Views •
2026
Source: Moore, M. D., et al. Alternative In Vitro Methods for the Determination of Viral Capsid Structural Integrity. J. Vis. Exp. (2017)The video demonstrates a protocol for monitoring the heat-induced aggregation of virus-like particles using dynamic light scattering (DLS). It begins with preparing a monodisperse suspension of purified particles. The sample is then loaded into a preheated DLS instrument. As the capsid proteins denature with heat, exposed hydrophobic regions cause particle...
07:51
Application of Voltage in Dynamic Light Scattering Particle Size Analysis
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Cited by 6 •
2020
Here, a protocol to apply voltage to solution during dynamic light scattering particle size measurements with the intent to explore the effect of voltage and temperature changes on polymer aggregation is presented.
10:35
DNA-magnetic Particle Binding Analysis by Dynamic and Electrophoretic Light Scattering
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Cited by 6 •
2017
This protocol describes the synthesis of magnetic particles and evaluation of their DNA-binding properties via dynamic and electrophoretic light scattering. This method focuses on monitoring changes in particle size, their polydispersity and zeta potential of particle surface which play major role in binding of materials such as DNA.
13:30
Mass-Sensitive Particle Tracking to Characterize Membrane-Associated Macromolecule Dynamics
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Cited by 3 •
2022
This protocol describes an iSCAT-based image processing and single-particle tracking approach that enables the simultaneous investigation of the molecular mass and the diffusive behavior of macromolecules interacting with lipid membranes. Step-by-step instructions for sample preparation, mass-to-contrast conversion, movie acquisition, and post-processing are provided alongside directions to prevent potential pitfalls.
03:37
Subatomic Particles
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2020
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom. The Discovery of the Electron The first clue about the subatomic structure came at the end of the 19th century when J.J. Thomson discovered the electron using a cathode ray tube. This apparatus consisted of a sealed glass...
FAQs
Net force determines acceleration through Newton’s laws, while mass sets how strongly motion responds to that force. A force balance therefore does more than identify individual pushes or pulls: it establishes the acceleration that updates the object’s velocity and position. Including the initial position and velocity then allows the subsequent trajectory to be predicted rather than described only at one instant.
Momentum and energy provide complementary quantities for determining how a system evolves. Momentum is useful for describing motion and interactions, while energy offers another way to track changes in the system. Considering these quantities with force and acceleration can constrain predicted behavior and organize analyses of collisions, trajectories, or other changing physical systems.
Free-body diagrams isolate an object or selected part of a system and display the forces relevant to its motion. This representation helps distinguish the net force from the separate interactions contributing to it, reducing omissions or incorrect force combinations. Once the diagram is established, the resulting force balance can be translated into equations for acceleration and subsequent motion.
Differential equations express how forces change motion, making them useful when acceleration varies with time or depends on position. Numerical models extend this approach when the equations are difficult to solve directly, producing approximate trajectories through computation. The choice between equation-based and numerical treatment depends on the complexity of the force pattern and the desired prediction.
A practical analysis begins by identifying the particles or bodies, specifying their initial conditions, and representing the relevant forces with a free-body diagram. The analyst then forms governing equations using Newton’s laws, mass, and net force, and solves for the evolving motion through equations or numerical models. This workflow converts a physical situation into predictions of trajectories and system behavior.
When several particles interact, particle dynamics can examine how their motions influence one another and how the overall system evolves. Momentum, energy, force balances, and numerical models provide different lenses for interpreting the same interaction. Such analyses support questions about collisions, stability, and responses to applied forces, linking individual trajectories to system-level behavior in physics and engineering.