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Related Concept Videos

Partial Fractions01:28

Partial Fractions

37
A partial fraction is a component of a rational expression represented as the sum of simpler fractions. When a rational function is expressed as a ratio of two polynomials, it can often be decomposed into a sum of fractions whose denominators are simpler polynomials, typically linear or irreducible quadratic factors. This process is called partial fraction decomposition, and it is used to simplify complex expressions for integration, solving equations, or analysis.Partial fraction decomposition...
37
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

1.1K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
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Updated: Nov 1, 2025

A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice
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DIY Universal Fraction Collector.

David Díaz, Ana de la Iglesia, Francisco Barreto

    Analytical Chemistry
    |June 25, 2021
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a low-cost, customizable 3D-printed fraction collector for biochemistry labs. This adaptable device offers a versatile and affordable alternative to expensive commercial systems, enhancing experimental flexibility.

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    Area of Science:

    • Biochemistry
    • Pharmacology
    • Drug Discovery

    Background:

    • Fraction collectors are vital laboratory tools but lack versatility and are often expensive.
    • Limitations include fixed tube sizes, rigid exchange sequences, and lack of parallel collection capabilities.
    • High costs hinder accessibility for smaller or less-resourced laboratories.

    Purpose of the Study:

    • To design and describe the construction of a customizable and affordable 3D-printed fraction collector.
    • To provide a cost-effective solution for laboratories needing adaptable sample collection systems.
    • To enable tailored fraction collection for diverse experimental needs.

    Main Methods:

    • Utilized 3D printing technology and readily available electronic components.
    • Developed detailed instructions, including 3D files, parts lists, electronic circuits, and software.
    • Designed for adaptability to various rack and tube sizes and collection protocols.

    Main Results:

    • Successfully built a functional fraction collector with a total cost of approximately €100.
    • The device demonstrates adaptability for different tube sizes, collection sequences, and parallel collection.
    • The 3D-printable design and open-source components facilitate widespread replication and customization.

    Conclusions:

    • A low-cost, highly adaptable 3D-printed fraction collector can be built using accessible technology.
    • This DIY approach significantly reduces the financial barrier to essential laboratory equipment.
    • The developed system enhances experimental flexibility in biochemistry, pharmacology, and drug discovery workflows.