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Related Concept Videos

Net Torque Calculations01:19

Net Torque Calculations

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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...
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Retrovirus Life Cycles01:10

Retrovirus Life Cycles

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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
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Torque01:10

Torque

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Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
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Viral Structure00:56

Viral Structure

61.4K
Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
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Retroviruses02:33

Retroviruses

12.1K
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
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Torque Free Motion01:15

Torque Free Motion

444
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...
444

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Related Experiment Video

Updated: May 20, 2025

Magnetic Tweezers for the Measurement of Twist and Torque
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Torque Teno Virus: Lights and Shades.

Paola Brani1,2, Hafza Zahira Manzoor1, Pietro Giorgio Spezia3

  • 1Department of Medicine and Technological Innovation, University of Insubria, 21100 Varese, Italy.

Viruses
|March 27, 2025
PubMed
Summary

Torque Teno Virus (TTV), a common DNA virus, is being studied as a biomarker for immune status. Monitoring TTV levels may aid treatment decisions for immune-compromised patients.

Keywords:
anellovirusesimmune markerimmunocompromisedsolid organ transplanttorque teno virus (TTV)transplantationviral load

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Related Experiment Videos

Last Updated: May 20, 2025

Magnetic Tweezers for the Measurement of Twist and Torque
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Method to Measure Tone of Axial and Proximal Muscle
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Area of Science:

  • Virology
  • Immunology
  • Biomarker Research

Background:

  • Torque Teno Virus (TTV) is a widespread, non-pathogenic DNA virus.
  • TTV's replication mechanisms and host immune system interactions remain incompletely understood.
  • Despite knowledge gaps, TTV is explored as a functional immune system biomarker.

Purpose of the Study:

  • To review the current understanding of Torque Teno Virus.
  • To highlight TTV's potential role as an immune system biomarker.
  • To identify areas of knowledge gaps regarding TTV.

Main Methods:

  • This is a review article, synthesizing existing research on TTV.
  • Literature search and analysis of studies investigating TTV prevalence and function.
  • Examination of TTV's relationship with host immune status.

Main Results:

  • TTV is highly prevalent across human populations.
  • Plasma TTV levels show potential correlation with host immune status.
  • TTV monitoring may inform clinical decisions in immunocompromised patients.

Conclusions:

  • TTV is an enigmatic virus with potential clinical applications.
  • Further research is needed to elucidate TTV replication and immune interactions.
  • TTV holds promise as a biomarker for managing inflammatory and immunological diseases.