Dye Injection
Dye Injection - Related Videos
06:05
Assessing Urinary Tract Junction Obstruction Defects by Methylene Blue Dye Injection
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Cited by 1 •
2017
Methylene blue dye injection into the renal pelvis facilitates the assessment of urinary tract junction obstruction defects during mouse embryonic urinary tract development. Here, a protocol for methylene blue dye injection into the renal pelvis is described.
11:12
Whole Mount Preparation of the Adult Drosophila Ventral Nerve Cord for Giant Fiber Dye Injection
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Cited by 21 •
2011
An in vivo dissection of the adult Drosophila ventral nerve cord (VNC) is demonstrated. This particular dissection method causes little damage to the VNC allowing the subsequent labeling of the giant fiber neurons with fluorescent dye for high resolution imaging.
09:04
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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2011
Vascular mapping of monochorionic (MC) twin placentas after birth provides a means for detailed demonstration of vascular connections between the twins’ circulations. Imbalance of these connections is thought to play a pivotal role in the development of complications of MC twinning including twin-to-twin transfusion syndrome.
03:47
Methylene Blue Dye Injection in Mouse Embryonic Urinary Tract: A Method To Assess the Congenital Obstruction in the Urinary Tract
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2025
In this video, we administer methylene blue dye injection into the urinary tract of a perinatal embryonic mouse to assess congenital anomalies related to urinary tract obstruction.
10:30
Dye-sensitized Solar Cells
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University Today's modern world requires the use of a large amount of energy. While we harness energy from fossil fuels such as coal and oil, these sources are nonrenewable and thus the supply is limited. To maintain our global lifestyle, we must extract energy from renewable sources. The most promising renewable source, in terms of abundance, is the sun, which provides us with more than enough solar energy to fully fuel our...
FAQs
The dye’s concentration and spatial distribution change as the carrier fluid transports it. Tracking those changes can distinguish directional movement from uneven velocities, mixing, diffusion, or recirculation, while the time pattern indicates how long fluid remains in a region. This makes concentration data useful for linking observed transport behavior to channel, pipe, or system geometry.
Imaging provides a visual record of where the colored or fluorescent substance spreads, whereas sampling follows the tracer through fluid observations. Either approach can show how the distribution evolves over time, but their outputs emphasize different evidence: images expose spatial patterns, while samples document concentration changes at selected observations. The choice depends on the flow system and measurement goal.
Recirculation and residence patterns help reveal regions that do not exchange fluid in the same way as the main flow. A tracer that remains or returns in an area can expose these behaviors, which may affect how a hydraulic design performs. Engineers can use the resulting evidence to locate dead zones and assess whether geometry produces the intended transport.
A basic workflow begins by introducing a colored or fluorescent dye into the fluid, then tracking its movement with imaging or sampling over time. The recorded concentration or distribution is compared across the system to identify direction, velocity differences, mixing, diffusion, recirculation, or residence behavior. Applying these observations under relevant operating conditions connects transport patterns with system performance.
Dye Injection can be used in channels, pipes, porous media, and hydraulic systems because each setting presents a different transport environment. In a channel or pipe, observations can expose uneven flow or recirculation; in porous media, distribution patterns can show how transport proceeds through the medium. These applications help connect physical flow behavior with the geometry being evaluated.
In engineering studies, tracer observations provide evidence for evaluating designs, identifying leaks or dead zones, and diagnosing performance. They can also support computational model validation by comparing predicted transport behavior with observed dye movement and distribution. Agreement or mismatch helps indicate whether a model represents the system’s flow patterns adequately and links computational results to physical behavior.