Electric Low Pressure Impactor
Electric Low Pressure Impactor - Related Videos
03:24
Generating a Mouse Model of Traumatic Brain Injury Using an Impactor Device
0 Views •
2025
This video demonstrates the procedure for inducing traumatic brain injury (TBI) in a mouse model. An anesthetized mouse with an exposed skull is taken to create an opening in the skull, and then a controlled cortical injury is induced using an impact device. The injury damages the brain tissue, causing impaired cognitive function and motor coordination.
03:58
Generating a Traumatic Brain Injury Mouse Model Using an Impactor Probe
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2025
This video demonstrates the procedure for inducing an open-skull traumatic brain injury in a mouse by making a midline skull incision, drilling through the skull and removing the bone flap to expose the brain cortex, and applying high pressure to induce trauma. The wound is then sutured to prepare the mouse model for subsequent experiments.
07:28
A Contusive Model of Unilateral Cervical Spinal Cord Injury Using the Infinite Horizon Impactor
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Cited by 46 •
2012
A reliable and repeatable way to produce a cervical unilateral spinal cord injury using the Infinite Horizon impactor is described. The method takes advantage of a custom designed frame and clamp to stabilize the spine. The standardized procedure and biomechanical injury parameters result in sufficient and sustained injuries.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
06:50
Electric Potential
0 Views •
2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Electric potential, also known as "voltage", measures the electric potential energy per unit charge. Electric field is a scalar quantity and is fundamental to many electrical effects. Like potential energy, what is physically meaningful is the difference in the electric potential. For example, the spatial variation in the electric potential is related to the electric...
FAQs
Within the instrument, particles pass through successive low-pressure impactor stages. At these stages, electrical charging and aerodynamic separation work together, so particles are directed according to aerodynamic diameter before reaching collection plates. This staged arrangement lets the ELPI distinguish particle populations across its measurement range while retaining a rapid electrical readout rather than relying on slow post-collection analysis.
Each collection plate receives particles separated at its corresponding stage and remains electrically isolated from the others. That separation allows the electrical signal from one stage to be measured independently. Comparing signals across the stages provides the basis for determining how particle concentration is distributed by aerodynamic diameter, while keeping stage-specific information available for interpretation.
The current measured at each stage serves as a rapid signal for the amount of particle material collected there. Reading all stages together produces a particle size distribution and concentration profile across the instrument's range. Because the signal is electrical and obtained during collection, researchers can follow particle populations in real time without laborious post-collection analysis.
To make a measurement, the instrument draws in an airborne sample and sends it through the low-pressure impactor stages. Particles become electrically charged, are separated by aerodynamic diameter, and are collected on the corresponding isolated plates. The instrument then measures current at each stage to generate a real-time size and concentration distribution.
In biology, ELPI data can characterize bioaerosols, aerosolized cells, and microorganisms by showing how their airborne particle populations are distributed across aerodynamic diameters. That information helps connect particle size patterns with transport through air and deposition behavior. It also gives researchers a rapid way to examine biologically relevant aerosols without depending solely on laborious analysis after collection.
During inhalation-exposure studies, the instrument can track the particle characteristics present in an airborne exposure rather than providing only a post-collection snapshot. Researchers can also apply it to particle-generating processes to observe the resulting size and concentration profile. These measurements support assessment of how biological aerosols move, deposit, and may contribute to potential health risks.