Reversal Time Measurement

Reversal time measurement is the quantification of how long a biological, biochemical, or engineered system takes to switch from one defined state to its opposite after a controlled stimulus. The measurement typically involves applying a precisely timed perturbation, monitoring a measurable response such as force, motion, fluorescence, pressure, or electrical activity, and identifying the transition endpoints from the resulting time trace. In bioengineering, reversal time helps characterize response kinetics, relaxation behavior, actuator performance, and feedback control in cells, tissues, biomaterials, and biomedical devices. Comparing reversal times across conditions can reveal rate-limiting processes, evaluate system stability, and guide the design of faster, more reliable therapeutic and diagnostic technologies.

Reversal Time Measurement - Related Videos

Research

JoVE EoE - PCR Techniques

Real-Time Quantitative Reverse Transcription PCR for Diagnosing Viral Infections

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2025

This video demonstrates a quantitative method for detecting viral infection using real-time reverse transcription PCR. The reverse transcription step converts the RNA to cDNA, which is then amplified via PCR cycles. The presence of viral RNA in the sample is confirmed by analyzing the amplification and dissociation curves of DNA obtained from the PCR.

Measuring Plasma Membrane Protein Endocytic Rates by Reversible Biotinylation

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Cited by 23 •

2009

Regulated endocytosis governs the cell surface expression levels of the majority of membrane proteins. Here we utilize reducible, membrane impermeant biotinylation reagents to measure the endocytic rate of the dopamine transporter (DAT), a polytopic membrane protein. The method facilitates a straightforward approach to measuring the endocytic rate of most plasma membrane proteins.

Measuring Hepatitis C Viral Load Using Quantitative Reverse Transcription Polymerase Chain Reaction

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2026

Source: Ren, S., et al. A Protocol for Analyzing Hepatitis C Virus Replication. J. Vis. Exp. (2014).This video demonstrates the procedure for quantifying Hepatitis C viral RNA using quantitative reverse transcription PCR to measure viral load in infected cell cultures.

Real-Time Force Measurement Between Emulsion Droplets During Enzymatic Breakdown

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2025

This protocol employs dual-trap optical tweezers to measure inter-droplet forces in real time during the enzymatic digestion of emulsions. It facilitates the study of emulsion stability and droplet dynamics, with applications in food science and pharmaceuticals.

Research

JoVE Journal - Medicine
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Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty

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Cited by 22 •

2013

Frailty syndrome is commonly seen in the aged and reflects multi-system physiological change. However, with reduced functional reserve and resilience frailty is also known to be common in the HIV infected population. This study outlined an easily administered screening test to identify HIV patients with frailty. When significant components of frailty are identified, clinicians will be able to focus on amelioration of the problem and promote reversion to the pre-frail state.

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