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Related Concept Videos

Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
Instrumentation Amplifier01:25

Instrumentation Amplifier

An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Clamper Circuit01:14

Clamper Circuit

A clamper circuit, also known as a DC restorer, represents a specialized variant of the rectifier circuit, notable for its method of taking the output across the diode rather than the capacitor. This configuration lends to several distinctive applications, particularly in handling square wave inputs.
Within this circuit, the diode's orientation prompts the capacitor to charge up to the level of the most negative peak of the input signal. Upon reaching this state, the diode ceases to conduct,...
PD Controller: Design01:26

PD Controller: Design

In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...

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Related Experiment Video

Updated: May 26, 2026

Hybrid Microdrive System with Recoverable Opto-Silicon Probe and Tetrode for Dual-Site High Density Recording in Freely Moving Mice
08:57

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A simple FRET-based modular design for diagnostic probes.

Orit Redy1, Einat Kisin-Finfer, Eran Sella

  • 1Department of Organic Chemistry, School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel.

Organic & Biomolecular Chemistry
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed new Turn-On molecular probes using self-immolative adaptors and Förster Resonance Energy Transfer (FRET). Analyte detection triggers a release, generating a measurable fluorescent signal for quantification.

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Area of Science:

  • Molecular probes
  • Biophysical chemistry
  • Optical sensing

Background:

  • Optical molecular probes are crucial for detecting analytes.
  • Fluorescence-based probes often rely on changes in fluorescence properties for signal generation.
  • Förster Resonance Energy Transfer (FRET) is a key technique in molecular sensing.

Purpose of the Study:

  • To demonstrate self-immolative molecular adaptors as a platform for Turn-On probes.
  • To utilize the FRET technique for analyte quantification.
  • To develop a modular probe design for versatile chemical sensing.

Main Methods:

  • Designing probes with identical fluorophore pairs or a fluorophore/quencher FRET pair.
  • Incorporating a triggering substrate that reacts with the analyte of interest.
  • Utilizing a self-immolative adaptor that releases dye molecules upon analyte reaction.

Main Results:

  • The reaction of the analyte with the triggering substrate initiates the self-immolative process.
  • The self-immolative adaptor releases dye molecules, disrupting the FRET effect.
  • A new, measurable fluorescent signal is generated, enabling analyte quantification.

Conclusions:

  • Self-immolative molecular adaptors offer a promising platform for Turn-On FRET probes.
  • The probe design allows for the generation of quantifiable fluorescent signals.
  • The modularity of the probe facilitates the development of diverse chemical sensors.