Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Motor Units00:46

Motor Units

53.8K
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
53.8K
Motor Units01:13

Motor Units

14.2K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
14.2K
Torque Free Motion01:15

Torque Free Motion

942
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
942
Net Torque Calculations01:19

Net Torque Calculations

9.3K
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
9.3K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

5.6K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
5.6K
Electro-mechanical Systems01:19

Electro-mechanical Systems

1.3K
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...
1.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Chemical Fuel-Driven Networked Catalytic Machinery.

Chemistry (Weinheim an der Bergstrasse, Germany)·2025
Same author

Noble Gas Provides a Solution to the Synthesis-On-Inert-Surfaces Challenge for Extended Covalent Nanostructures.

Angewandte Chemie (International ed. in English)·2025
Same author

Networked Multicomponent Ensemble as AND Gate with FRET Output.

Chemistry (Weinheim an der Bergstrasse, Germany)·2024
Same author

Dynamic negative allosteric effect: regulation of catalysis <i>via</i> multicomponent rotor speed.

Chemical communications (Cambridge, England)·2024
Same author

Dissipative sequential catalysis <i>via</i> six-component machinery.

Chemical communications (Cambridge, England)·2024
Same author

Stepwise Dissipative Control of Multimodal Motion in a Silver(I) Catenate.

Angewandte Chemie (International ed. in English)·2024

Related Experiment Video

Updated: May 3, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
09:48

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

9.9K

A five-component nanorotor with speed regulation.

Soumen K Samanta1, Jan W Bats, Michael Schmittel

  • 1Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Str. 2, D-57068 Siegen, Germany. schmittel@chemie.uni-siegen.de.

Chemical Communications (Cambridge, England)
|January 23, 2014
PubMed
Summary
This summary is machine-generated.

Researchers created a novel five-component supramolecular nanorotor with controllable brakes. This molecular machine

More Related Videos

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

3.1K
Rapid, Scalable Assembly and Loading of Bioactive Proteins and Immunostimulants into Diverse Synthetic Nanocarriers Via Flash Nanoprecipitation
06:57

Rapid, Scalable Assembly and Loading of Bioactive Proteins and Immunostimulants into Diverse Synthetic Nanocarriers Via Flash Nanoprecipitation

Published on: August 11, 2018

7.7K

Related Experiment Videos

Last Updated: May 3, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
09:48

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

Published on: June 30, 2018

9.9K
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

3.1K
Rapid, Scalable Assembly and Loading of Bioactive Proteins and Immunostimulants into Diverse Synthetic Nanocarriers Via Flash Nanoprecipitation
06:57

Rapid, Scalable Assembly and Loading of Bioactive Proteins and Immunostimulants into Diverse Synthetic Nanocarriers Via Flash Nanoprecipitation

Published on: August 11, 2018

7.7K

Area of Science:

  • Supramolecular chemistry
  • Nanotechnology
  • Molecular machines

Background:

  • Development of molecular machines requires precise control over their motion.
  • Switchable brakes are essential for regulating the speed and function of nanorotors.
  • Photo- and heat-responsive molecules offer tunable mechanisms for controlling molecular devices.

Purpose of the Study:

  • To engineer a five-component supramolecular nanorotor.
  • To incorporate a reversible braking mechanism into the nanorotor.
  • To utilize a photo- and heat-responsive signal transducer for speed control.

Main Methods:

  • Synthesis of a four-component supramolecular nanorotor.
  • Integration of 2,2'-diazastilbene as a signal transducer.
  • Characterization of the nanorotor's rotational properties under different stimuli.

Main Results:

  • Successful preparation of a five-component supramolecular nanorotor.
  • Demonstration of reversibly acting brakes controlled by 2,2'-diazastilbene.
  • Reversible switching of rotational speed between 86 kHz and 38 kHz.

Conclusions:

  • The novel five-component nanorotor exhibits controllable rotational speed via external stimuli.
  • The integrated 2,2'-diazastilbene acts as an effective signal transducer for braking.
  • This work advances the design of switchable molecular machines with tunable functions.