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Related Concept Videos

Correlations02:20

Correlations

35.8K
Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...
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Capacitors and Capacitance01:18

Capacitors and Capacitance

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A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
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Equivalent Capacitance01:19

Equivalent Capacitance

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Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
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Equivalent Capacitance01:19

Equivalent Capacitance

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From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
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Correlation and Causation01:27

Correlation and Causation

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Statistical tests can calculate whether there is a relationship, or correlation, between independent and dependent variables. An indirect relationship of the variables signifies a correlation, while a direct relationship shows causation. If it is determined that no connection exists between the variables, then the correlation is a coincidence.
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
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Correlation01:09

Correlation

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In statistics, two variables are said to be correlated if the values of one variable are associated with the other variable. Depending on the relationship between two variables, correlation can be of three types– positive correlation, negative correlation, and zero correlation.
Two variables, for example, a and b, are said to be positively correlated if both variables move in the same direction. In other words, a positive correlation exists between two variables, a and b, if:
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Related Experiment Video

Updated: Jan 22, 2026

Surgery and Sample Processing for Correlative Imaging of the Murine Pulmonary Valve
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Correlation of Capacitance and Microscopy Measurements Using Image Processing for a Lab-on-CMOS Microsystem.

Bathiya P Senevirathna, Sheung Lu, Marc P Dandin

    IEEE Transactions on Biomedical Circuits and Systems
    |July 9, 2019
    PubMed
    Summary

    This study introduces a novel capacitance sensor chip for real-time monitoring of biological cell viability and proliferation. The device offers sensitive, unsupervised cell monitoring suitable for diverse applications.

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    Area of Science:

    • Biomedical Engineering
    • Materials Science
    • Cell Biology

    Background:

    • Monitoring cell viability and proliferation is crucial for biological research and drug development.
    • Existing methods often require complex procedures or specialized laboratory settings.
    • There is a need for sensitive, real-time, and user-friendly cell monitoring tools.

    Purpose of the Study:

    • To develop and validate a capacitance sensor chip for monitoring biological cell viability and proliferation.
    • To assess the chip's performance in real-time tracking of cancer cell lines.
    • To integrate the sensor with an imaging platform for concurrent visual and electrical monitoring.

    Main Methods:

    • A capacitance sensor chip was fabricated using a 0.35-μm complementary metal-oxide-semiconductor (CMOS) process.
    • The chip utilizes capacitance-to-frequency conversion to measure cell-to-substrate binding.
    • In vitro experiments were conducted using human ovarian cancer cell lines (CP70 and A2780) over three days.
    • An integrated imaging platform provided time-lapse visualization of cell behavior on the sensor surface.

    Main Results:

    • The sensor demonstrated a sensitivity of 590 kHz/fF for capacitance-to-frequency conversion.
    • Real-time tracking of cell viability for two human ovarian cancer cell lines was achieved over three days.
    • The system detected single-cell binding events and changes in cell morphology.
    • Image processing revealed a linear correlation between cell coverage and sensor output, with a sensor gain of 1.28 ± 0.29 aF/μm².

    Conclusions:

    • The developed capacitance sensor chip effectively monitors biological cell viability and proliferation in real-time.
    • The device's ability to detect single-cell events and morphological changes offers valuable insights into cell behavior.
    • Its design for unsupervised operation and minimal packaging makes it suitable for both laboratory and non-laboratory settings.