acid stain

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ac·id stain

(as'id stān)
A dye in which the anion is the colored component of the dye molecule, e.g., sodium eosinate (eosin).

acid stain

A chemical used to stain the cytoplasmic or basic components of cells.
See also: stain


1. a substance used to impart color to tissues or cells, to facilitate microscopic study and identification.
2. an area of discoloration of the skin.

acid stain
a stain in which the coloring agent is in the acid radical.
basic stain
a stain in which the coloring agent is in the basic radical.
carbol fuschin stain
used to stain some gram-negative bacteria, including Campylobacter fetus.
Castaneda's stain
a technique for demonstrating chlamydial elementary bodies, using formol blue and safranine.
Diene's stain
one containing methylene blue, maltose and azure II, used for staining mycoplasmal microcolonies.
differential stain
one which facilitates differentiation of various elements in a specimen.
hematoxylin and eosin stain
a staining method employed universally for routine histological examination of tissue sections.
India ink stain
used to demonstrate capsules on Cryptococcus neoformans and some bacterial species.
lambing stain
staining of the breech and back of the udder of a ewe caused by the passage of the fetal fluids and then the lochia. Used as a guide to whether or not the ewe has lambed and perhaps lost her lamb.
Macchiavello stain
a basic fuscin solution for staining chlamydial elementary bodies.
metachromatic stain
one that produces in certain elements color different from that of the stain itself.
methanamine silver stain
stains fungal elements in tissue a dark brown.
new methylene blue stain
a metachromatic dye used for staining blood, vaginal smears, and tissue samples for cytological examination. Particularly useful in demonstrating reticulocytes.
Newman's stain
used on smears of milk for demonstrating organisms in mastitis.
nigrosin stain
an aniline dye used in wet mounts to demonstrate capsules, especially with cryptococcusneoformans.
nuclear stain
one that selectively stains cell nuclei, generally a basic stain.
ophthalmic stain
used in the diagnosis of diseases of the eye, e.g. fluorescein and rose bengal dyes.
supravital stain
a stain introduced in living tissue or cells that have been removed from the body.
tumor stain
an area of increased density in a radiograph, due to collection of contrast material in distorted and abnormal vessels, prominent in the capillary and venous phases of arteriography, and presumed to indicate neoplasm.
vital stain
a stain introduced into the living organism, and taken up selectively by various tissue or cellular elements. Often used to determine the live/dead cell ratio in a cell population.
Wright's stain
a mixture of eosin and methylene blue, used for demonstrating blood cells.
Ziehl-Neelsen stain
one of carbol fuchsin counterstained with methylene blue; used to demonstrate acid-fast organisms, especially Mycobacterium spp., in smears and tissues. A modified method using mild acid to decolorize is used for staining Brucella spp. and Nocardia asteroides. See also acid-fast.
References in periodicals archive ?
AnaSpec, EGT Group is pleased to showcase a variety of premium quality stains, including cell-impermeant and cell-permeant nucleic acid stains.
The companies recommended a combination of acid stain and polyurethane sealant to provide the look of marble as well as a durable, easily maintained coating surface.
Except for acid stains on the document that come naturally with age, and the previous use of tape to repair and contain a tear here and there, the document is in excellent condition.
Solvent-based acid stains react with the lime in the concrete to produce the colored effect, which is usually mottled and variegated.
Among the company's products are the SYRB brand nucleic acid stains for nucleic acid detection for genomics, the Alexa Fluor brand dyes for bright labeling for imaging and cytometry and SYPRO protein gel stains.
Using proprietary advanced robotic operation, aliquots of each urine sample are dispensed into a cassette, and fluorescent nucleic acid stains are added.