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Related Concept Videos

Resistance01:19

Resistance

When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
Resistivity01:22

Resistivity

When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
Treatment Resistant Cancers02:56

Treatment Resistant Cancers

Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
Ohm's Law01:19

Ohm's Law

Resistors are fundamental components in electrical circuits, often manufactured from metallic alloys or carbon compounds. They model a material's ability to resist the flow of electric current, a characteristic that is crucial in controlling and regulating electrical power within a circuit.
This current-resisting behavior of resistors is governed by Ohm's law, which states that the voltage across a resistor is directly proportional to the current flowing through it.
Ohm's Law01:21

Ohm's Law

Many materials exhibit a simple relationship between the values of current, voltage, and resistance, known as Ohm’s law. The current that flows through most substances is directly proportional to the voltage applied to them. The German physicist Georg Simon Ohm (1787–1854) was the first to demonstrate experimentally that the current in a metal wire is directly proportional to the voltage applied. Any material, component, or device that obeys Ohm’s law, where the current through the device is...
Resistors In Parallel01:23

Resistors In Parallel

Resistors are in parallel when one end of all the resistors are connected to a continuous wire of negligible resistance and the other end of all the resistors are also connected to one another through a continuous wire of negligible resistance. In the case of a parallel configuration, the potential drop across each resistor is the same. Current through each resistor can be found using Ohm’s law, I = V/R, where the voltage is constant across each resistor. The sum of the individual currents...

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Updated: May 20, 2026

Protocols for Robust Herbicide Resistance Testing in Different Weed Species
10:52

Protocols for Robust Herbicide Resistance Testing in Different Weed Species

Published on: July 2, 2015

Resisting resistance.

Bernardo J Foth

    Nature Reviews. Microbiology
    |July 17, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Understanding the malaria parasite genome is key to combating drug resistance. This knowledge helps in developing strategies to mitigate the spread of resistant malaria strains.

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    Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
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    Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms

    Published on: December 9, 2015

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    Last Updated: May 20, 2026

    Protocols for Robust Herbicide Resistance Testing in Different Weed Species
    10:52

    Protocols for Robust Herbicide Resistance Testing in Different Weed Species

    Published on: July 2, 2015

    Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
    08:46

    Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms

    Published on: December 9, 2015

    Area of Science:

    • Genomics
    • Parasitology
    • Drug Resistance Studies

    Background:

    • The malaria parasite, Plasmodium falciparum, poses a significant global health threat.
    • Emergence of drug resistance in malaria parasites is a major challenge to disease control efforts.

    Discussion:

    • Genomic data provides critical insights into the mechanisms of antimalarial drug resistance.
    • Analyzing the parasite's genome aids in identifying genetic markers associated with resistance.

    Key Insights:

    • Knowledge of the malaria parasite genome is essential for understanding and predicting drug resistance.
    • Genomic surveillance can help track the evolution and spread of resistant parasite populations.

    Outlook:

    • Leveraging genomic information can guide the development of novel antimalarial drugs and treatment strategies.
    • Continued genomic research is vital for sustained malaria control and elimination efforts.