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Related Concept Videos

Oxygen Transport in the Blood01:27

Oxygen Transport in the Blood

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Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
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Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen01:16

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Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
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Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
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Oxygen Requirements and Growth Patterns01:29

Oxygen Requirements and Growth Patterns

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Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
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Administering Oxygen by Mask01:30

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Administering Oxygen by Mask
Administering oxygen by mask is a common nursing intervention that provides supplemental oxygen to patients with respiratory distress or chronic lung conditions. This procedure involves delivering oxygen at a specified rate through a face mask connected to an oxygen source.
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Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

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Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
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Related Experiment Video

Updated: Feb 3, 2026

Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
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Let there be oxygen and T cells.

Paul R Walker

    The Journal of Clinical Investigation
    |October 16, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Tumor stroma can hinder anti-cancer immune responses, especially in hypoxic tumor regions. Targeting both hypoxia and immune checkpoints may enhance T cell infiltration in cold tumors.

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    Area of Science:

    • Oncology
    • Immunology
    • Cancer Research

    Background:

    • The tumor microenvironment, particularly the stroma, plays a critical role in regulating immune cell infiltration.
    • Hypoxia within solid tumors can create an immunosuppressive environment, limiting the effectiveness of anti-cancer therapies.
    • Immune checkpoint blockade (ICB) aims to convert "cold" tumors into "hot" tumors responsive to immunotherapy.

    Purpose of the Study:

    • To investigate the impact of tumor stroma and hypoxia on immune infiltration in cancer models.
    • To explore the potential of combining hypoxia-targeting therapies with ICB for improved anti-tumor immunity.

    Main Methods:

    • Utilized transgenic adenocarcinoma of the mouse prostate (TRAMP) cancer models.
    • Analyzed immune cell infiltration within tumor tissues, focusing on hypoxic zones.

    Main Results:

    • Demonstrated that tumor stroma can impede immune cell infiltration.
    • Observed that hypoxic tumor zones exhibit limited anti-tumor immune cell presence.
    • Identified recruitment of tumor-promoting immune cells in these regions.

    Conclusions:

    • Hypoxia-associated stromal effects significantly impact anti-tumor immunity.
    • Simultaneous targeting of hypoxia and immune checkpoints is a promising strategy for future clinical trials.
    • This approach could potentially convert immunologically "cold" tumors to "hot" tumors, increasing ICB efficacy.