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Related Concept Videos

Overview Of Cell Separation And Isolation01:20

Overview Of Cell Separation And Isolation

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Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
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Components of Language01:24

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Language, whether spoken, signed, or written, consists of specific components: lexicon and grammar. The lexicon is the vocabulary of a language, comprising its words. Grammar is the set of rules used to convey meaning through the lexicon. For example, English grammar adds “-ed” to most verbs to indicate past tense. Words are formed by combining phonemes, which are the basic sound units of a language. Different languages have different sets of phonemes (e.g., “ah” vs.
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Components of Stress01:23

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Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
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Cluster Sampling Method01:20

Cluster Sampling Method

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Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
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Vesicular Tubular Clusters01:45

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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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Related Experiment Video

Updated: Feb 13, 2026

Spatial Separation of Molecular Conformers and Clusters
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Separating T Cell Targeting Components onto Magnetically Clustered Nanoparticles Boosts Activation.

Alyssa K Kosmides, Kevin Necochea, John W Hickey

    Nano Letters
    |March 1, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a novel nanoparticle platform to precisely control T cell activation. This method enhances T cell stimulation for adoptive cell therapy (ACT) and immunological studies by magnetically clustering distinct signaling nanoparticles.

    Keywords:
    CD8+ T cellImmunotherapyartificial antigen presenting cellimmune synapsemagnetic clusteringnanoparticle

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    Area of Science:

    • Immunology
    • Biotechnology
    • Nanotechnology

    Background:

    • T cell activation relies on T cell receptor (TCR) signals and costimulatory signals.
    • Optimizing T cell functionality for applications like adoptive cell therapy (ACT) is crucial but complicated by the diversity of costimulatory molecules.

    Purpose of the Study:

    • To develop and validate a reductionist platform for customizable T cell activation.
    • To enable streamlined optimization of stimulatory conditions for ACT and general immune cell studies.

    Main Methods:

    • Utilized distinct, monospecific, paramagnetic nanoparticles for signal 1 (antigen) and signal 2 (costimulus).
    • Employed a magnetic field to cluster these nanoparticles on the cell surface, enabling controlled T cell stimulation.
    • Facilitated rapid synthesis and characterization of single-signal nanoparticles for systematic combination.

    Main Results:

    • Demonstrated significantly higher frequencies and numbers of stimulated cognate T cells from endogenous populations.
    • Showcased increased cognate T cell enrichment and effective incorporation of additional costimulatory molecules.
    • Validated the platform's utility in optimizing T cell activation.

    Conclusions:

    • The magnetic field-induced clustering of separate nanoparticles offers a powerful tool for T cell activation.
    • This platform provides a method for optimizing T cell activation protocols for adoptive immunotherapy and broader immunological research.