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Related Concept Videos

Application of Integration: Problem Solving01:30

Application of Integration: Problem Solving

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The process of breathing involves the periodic intake and expulsion of air, known as the respiratory cycle, which typically lasts about five seconds. Modeling the volume of air inhaled into the lungs as a function of time provides insight into both the dynamics and efficiency of pulmonary ventilation. This volume is determined by integrating the airflow rate over time, which captures the cumulative effect of air entering the lungs.Sinusoidal Model of AirflowAirflow during respiration is not...
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Applications of Molecular Taxonomy01:20

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Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
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Hydrostatic force is a fluid's total force at rest on a surface. For a horizontal surface submerged at a fixed depth, the pressure is constant and calculated as the product of fluid density, gravitational acceleration, and depth. In the case of a vertical dam wall submerged in water, this force is not evenly distributed due to the increasing pressure with depth. This variation arises from the cumulative weight of the water above each point. Integration is used to account for the continuous...
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Applications of Integration to Find Centers of Mass01:30

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Rotational equilibrium provides a natural framework for defining the center of mass of a system. For a plank balanced on a pivot with two unequal masses, equilibrium is achieved when the net torque about the pivot is zero. Torque is defined as the product of a force and its perpendicular distance from the pivot. When the torques due to all forces cancel, the pivot coincides with the center of mass of the system.For a system composed of several discrete point masses, the center of mass lies at...
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Applications of Integration to Find Blood Flow01:27

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Blood flow through a cylindrical blood vessel can be mathematically described using the principles of laminar flow, a regime in which fluid moves smoothly in parallel layers. In this model, the velocity of the blood is not uniform across the cross-section of the vessel; rather, it varies with the radial distance from the center. The maximum velocity occurs along the central axis, decreasing progressively toward the vessel walls, where it reaches zero due to viscous drag.Approximating Blood...
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In microeconomics, consumer surplus represents the economic gain that consumers experience when they purchase a good or service for less than the highest price they are willing to pay. This surplus arises from the characteristics of the demand function, which links the quantity of a good to the price consumers are willing to pay. As the quantity of a good increases, the price that consumers are willing to pay for each additional unit typically decreases, resulting in a downward-sloping demand...
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Related Experiment Video

Updated: Feb 5, 2026

Quantitative, Real-time Analysis of Base Excision Repair Activity in Cell Lysates Utilizing Lesion-specific Molecular Beacons
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Toehold integrated molecular beacon system for a versatile non-enzymatic application.

Zhenping Liu1, Yiyun Wang1, Xuchu Wang2

  • 1Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China.

Analytical and Bioanalytical Chemistry
|September 16, 2018
PubMed
Summary

We developed a novel toehold integrated molecular beacon (ToMB) for nucleic acid detection. This system offers enhanced specificity and a wider detection range, improving biosensor design.

Keywords:
Molecular beaconNucleic acid hybridizationToehold-mediated strand displacement reaction

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Nanotechnology

Background:

  • Molecular beacons (MBs) are oligonucleotide probes for nucleic acid hybridization.
  • Standard MBs face limitations in performance and design complexity when integrating additional sequences.

Purpose of the Study:

  • To develop and characterize a toehold integrated molecular beacon (ToMB) strategy.
  • To enable flexible regulation of nucleic acid hybridization reaction rates.
  • To enhance specificity and linearity range in nucleic acid detection.

Main Methods:

  • Designed and synthesized toehold integrated molecular beacons (ToMBs).
  • Investigated target-induced conformational switching for reaction rate control.
  • Applied ToMBs in hybridization chain reaction systems and logic gates.

Main Results:

  • ToMBs demonstrate flexible regulation of hybridization reaction rates via conformational switching.
  • Achieved high specificity and a wider linearity range compared to conventional MBs.
  • Successfully constructed hybridization chain reactions and OR logic gates using ToMBs.

Conclusions:

  • The ToMB strategy offers a versatile platform for nucleic acid detection.
  • ToMBs serve as powerful nano-modules for constructing universal biosensors.
  • This approach facilitates the development of molecular computations and multifunctional biosensing systems.