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These macrophages are not unique to the spleen but instead make up an integral part of the lymphoid parts of all secondary lymphoid organs. In the B cell follicles, the macrophages are important in clearing the apoptotic B cells that occur during the germinal centre reaction in the process of somatic hypermutation and isotype switching.
Liu's stain is composed of two dyes, Liu A and Liu B. Liu A is the anionic dye, contains eosin Y to stain cytoplasm as well as hemoglobin into red. Liu B, on the other hand, is the cationic dye, contains azur I and methylene azure, to stain nucleus and basophilic granules into blue. To apply the stain on a fixed smear, first add Liu A for some ...
The rate of putrefaction is greatest in air, followed by water, soil, and earth. The exact rate of putrefaction is dependent upon many factors such as weather, exposure and location. Thus, refrigeration at a morgue or funeral home can retard the process, allowing for burial in three days or so following death without embalming .
Schistosomiasis is also common among women, who may have greater exposure through daily chores that involve water, such as washing clothes and fetching water. [10] Other high-risk groups include farmers, fishermen, and people using unclean water during daily living. [5] Schistosomiasis belongs to the group of helminth infections. [11]
Another common variant is the Masson trichrome & Verhoeff stain, which combines the Masson trichrome stain and Verhoeff's stain. [2] This combination is useful for the examination of blood vessels ; the Verhoeff stain highlights elastin (black) and allows one to easily differentiate small arteries (which typically have at least two elastic ...
The Mexican water mouse, Mexican fishing mouse [2] or Goodwin's water mouse (Rheomys mexicanus), is a species of semiaquatic rodent in the family Cricetidae. [3] It has a restricted range in the state of Oaxaca in southern Mexico, Threatened by deforestation and water pollution, it is listed as Endangered by the International Union for Conservation of Nature (IUCN).
A micronucleus test is a test used in toxicological screening for potential genotoxic compounds. The assay is now recognized as one of the most successful and reliable assays for genotoxic carcinogens, i.e., carcinogens that act by causing genetic damage and is recommended by the OECD guideline for the testing of chemicals. [1]
The H&E staining procedure is the principal stain in histology [3] [7] [2] [5] in part because it can be done quickly, [7] is not expensive, and stains tissues in such a way that a considerable amount of microscopic anatomy [9] [10] is revealed, [7] [5] [4] and can be used to diagnose a wide range of histopathologic conditions. [8]