Staining Flashcards
is the process of applying dyes on the sections to see and study the physical characteristics of the cell
staining
process whereby tissue constituents are demonstrated in sections by direct interaction with a dye or staining solution
histological staining
various constituents of tissues are studied through chemical reactions that will permit microscopic localization
histochemical staining
a combination of immunological and histochemical techniques that allow phenotypic markers
immunohistochemical staining
3 major groups of staining
histological, histochemical, and immunohistochemical staining
methods of staining
direct, indirect, progressive, regressive, differentiation, metachromatic, counterstaining, metallic impregnation and vital staining
a process of giving color to sections by using aqueous or alcoholic dye solution
direct staining
a process whereby the action of the dye is intensified by adding another agent
indirect staining
serves as a link between tissue and the dye
mordant
does not participate in the staining reaction, but merely accelerates or hastens the speed of the staining reaction
accentuator
a process whereby tissue elements are stained in definite sequence
progressive staining
tissue is overstained to obliterate the cellular details, and the excess stain is removed
regressive staining
slower staining process in which the tissue is left in the staining solution
progressive
more rapid staining process in which the tissue is deliberately over-stained
regressive
usually done by washing the section in simple solution
differentiation
two dyes used in gram staining
crystal violet and fuchsin or safranin
entails the use of specific dyes which differentiate particular substances by staining them with a color that is different from that of the stain itself
metachromatic
application of different color or stain to provide contrast and background
counterstaining
process where specific tissue elements are demonstrated, not by stains, but by colorless solutions
metallic impregnation
selective staining of living cell constituents
vital staining
staining of living cell is done by injecting the dye into any part of animal body
intravital staining
used to stain living cells immediately after removal from the living body
supravital staining
best vital stain
neutral red
recommended for mitochondria
janus green
1 g of dye is dissolved in 100ml of sterile dis.
trypan blue