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Codocytes, also known as target cells, are red blood cells that have the appearance of a shooting target with a bullseye. In optical microscopy these cells appear to have a dark center (a central, hemoglobinized area) surrounded by a white ring (an area of relative pallor), followed by dark outer (peripheral) second ring containing a band of ...
In phase one, effector CTLs are generated from CTL precursors. The CTL precursors include naive T c cells since they are incapable of killing target cells. After a precursor cell has been activated, it can then differentiate into a functional CTL with cytotoxic activity. There are three sequential signals that are required to complete this process.
Use this six-quart slow cooker to make chili, queso, minestrone soup and so many more of your favorite cold-weather meals. Use the low setting for slow-cooking meats and stews, while the high ...
Sputter-coated ant specimen (Aulacopone relicta) for SEM examination.. Sputter coating in scanning electron microscopy is a sputter deposition process [clarification needed] to cover a specimen with a thin layer of conducting material, typically a metal, such as a gold/palladium (Au/Pd) alloy.
The target of a gene gun is often a callus of undifferentiated plant cells or a group of immature embryos growing on gel medium in a Petri dish. After the DNA-coated gold particles have been delivered to the cells, the DNA is used as a template for transcription (transient expression) and sometimes it integrates into a plant chromosome ('stable ...
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Dustpan and brush. A dustpan, the small version of which is also known as a "hearth brush and shovel” (from its use of cleaning the fireplace hearth), is a cleaning utensil. The dustpan is commonly used in combination with a broom or long brush. The small dustpan may appear to be a type of flat scoop.
Antigen presentation stimulates T cells to become either "cytotoxic" CD8+ cells or "helper" CD4+ cells.. A cytotoxic T cell (also known as T C, cytotoxic T lymphocyte, CTL, T-killer cell, cytolytic T cell, CD8 + T-cell or killer T cell) is a T lymphocyte (a type of white blood cell) that kills cancer cells, cells that are infected by intracellular pathogens such as viruses or bacteria, or ...
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