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Related Concept Videos

Bending of Members Made of Several Materials01:11

Bending of Members Made of Several Materials

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In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
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Lipid-soluble hormones diffuse across the plasma and nuclear membrane of target cells to bind to their specific intracellular receptors. These receptors act as transcription factors that regulate gene expression and protein synthesis in the target cell
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Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
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Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

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The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
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Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.
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In this lesson, determine the ratio of the maximum bending moments applied to two metal pipes, given that both pipes can withstand a maximum stress of 100 MPa. Both pipes have an outer radius of 1.8 cm. Pipe A has an inner radius of 1.5 cm, and Pipe B has an inner radius of 1 cm. The ratio of the maximum bending moment applied to two metallic pipes, each with a different inner and outer radius, is determined by considering their dimensions. The inner radius of the first pipe is 1.5 cm, and for...
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Related Experiment Video

Updated: Feb 7, 2026

Analysis and Specification of Starch Granule Size Distributions
08:46

Analysis and Specification of Starch Granule Size Distributions

Published on: March 4, 2021

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Intracellular starch granules in cytologic material.

T Reinhartz, G Lijovetzky, I S Levij

    Acta Cytologica
    |January 1, 1978
    PubMed
    Summary

    Starch glove powder can contaminate patient samples, leading to misinterpretation of diagnostic tests. Phagocytosis of starch granules by immune cells may be mistaken for genuine disease processes.

    Area of Science:

    • Cytopathology
    • Medical Laboratory Science
    • Histology

    Background:

    • Starch glove powder is commonly used in medical settings.
    • Contamination of biological samples with exogenous materials is a potential issue in diagnostics.
    • Accurate interpretation of phagocytosis is crucial for patient diagnosis.

    Observation:

    • Starch granules from gloves can contaminate patient materials.
    • Phagocytes can ingest starch granules, a process that mimics intracellular pathogen uptake.
    • This ingestion can occur when samples are not immediately fixed.

    Findings:

    • The presence of ingested material in cytologic preparations may be erroneously identified as intravital phagocytosis.
    • Starch granule phagocytosis can lead to a false impression of an ongoing biological process within the patient.

    More Related Videos

    Combining Histochemical Staining and Image Analysis to Quantify Starch in the Ovary Primordia of Sweet Cherry during Winter Dormancy
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    Impression Cytology of the Lid Wiper Area
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    Impression Cytology of the Lid Wiper Area

    Published on: August 9, 2016

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    Related Experiment Videos

    Last Updated: Feb 7, 2026

    Analysis and Specification of Starch Granule Size Distributions
    08:46

    Analysis and Specification of Starch Granule Size Distributions

    Published on: March 4, 2021

    5.7K
    Combining Histochemical Staining and Image Analysis to Quantify Starch in the Ovary Primordia of Sweet Cherry during Winter Dormancy
    07:25

    Combining Histochemical Staining and Image Analysis to Quantify Starch in the Ovary Primordia of Sweet Cherry during Winter Dormancy

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    Impression Cytology of the Lid Wiper Area
    07:01

    Impression Cytology of the Lid Wiper Area

    Published on: August 9, 2016

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  • Distinguishing between exogenous starch and true phagocytosed pathogens is critical.

    • Implications:

    • Cytologic interpretation requires careful consideration of potential contaminants.
    • Laboratory protocols should emphasize prompt sample fixation to prevent artifactual findings.
    • Misinterpretation of starch phagocytosis can lead to incorrect diagnoses and unnecessary patient treatment.