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Applying a primary stain (crystal violet) to a heat-fixed smear of a bacterial culture. Heat fixation kills some bacteria but is mostly used to affix the bacteria to the slide so that they do not rinse out during the staining procedure. The addition of iodine, which binds to crystal violet and traps it in the cell
Major applications include blood smears, bone marrow aspirates, semen analysis and cytology of various body fluids including urine and cerebrospinal fluid. [7] [8] Microbiologic agents, such as bacteria and fungi, also appear more easily in Diff-Quik. [3] This is useful for the detection of for example Helicobacter pylori from gastric and ...
Once stained, they do not decolourize. The addition of heat during the staining process is a huge contributing factor. [15] Heat helps open the spore's membrane so the dye can enter. The main purpose of this stain is to show germination of bacterial spores.
This diluted bacteria sample is commonly referred to as a smear after it is placed on a slide. After a smear has dried at room temperature, the slide is gripped by tongs or a clothespin and passed through the flame of a Bunsen burner several times to heat-kill and adhere the organism to the slide.
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]
Smears are air dried between 10 and 60 minutes, fixed in 80 vol% ethanol for 5 min at 20-22 °C, rinsed with tap water, and air dried. Films are then immersed in the citrate-phosphate buffer for 5 minutes at 37 °C and gently agitated for about 3 minutes.
A cytocentrifuge, sometimes referred to as a cytospin, [1] is a specialized centrifuge used to concentrate cells in fluid specimens onto a microscope slide so that they can be stained and examined. [2] Cytocentrifuges are used in various areas of the clinical laboratory, such as cytopathology, hematology and microbiology, as well as in ...
[1] [2] The body then traps the released iron and stores it as hemosiderin in tissues. [3] Hemosiderin is also generated from the abnormal metabolic pathway of ferritin. [3] It is only found within cells (as opposed to circulating in blood) and appears to be a complex of ferritin, denatured ferritin and other material.