STAINING Flashcards
increased affinity to basic stains
nucleus (acidic)
increased affinity to acidic stains
cytoplasm (alkaline)
for H and E
deparaffinize sections in ____, then rehydrate sections in ________ prior to actual staining
xylene; absolute and 95% alcohol
direct interaction with a dye or staining solution
histologic staining
study of the tissue constituents through their chemical reactions
histochemical staining
perl’s prussian blue reacts to
iron
periodic acid schiff staining for ___
glycogen
tissues required for enzyme histochemistry
- frozen sections
- tissues fixed in 4% formalin/formol saline
preferred specimen for enzyme histochemistry
frozen sections
types of enzymes used in enzyme histochemistry
oxidases, peroxidases, dehydrogenases, diaphorases, hydrolases, lyases
antibodies in detects ______ in immunohistochemical staining
phenotypic markers (tissue antigens)
uses aqueous or alcoholic dye solutions (e.g. methylene blue, eosin) to produce a color
direct staining
uses a mordant or another agent to intensify the action of the dye used
indirect staining
serves as a link/bridge between the tissue and the dye
mordant
hastens the staining reaction by increasing staining power &selectivity of dye
accentuator
tissue elements are stained in definite sequence
progressive (pag may progress, may sinusundan BASTA HAHA)
no decolorizer is applied; distinction of tissue detail relies solely on the selective affinity of the dye for various cellular elements
progressive staining
overstaining is done; excess stain is removed or decolorized from unwanted parts of the tissue and until the desired color is obtained
regressive staining
coal tar/aniline dyes
synthetic dyes
synthetic dyes are derived from
hydrocarbon benzene
substances with definite atomic groupings that are capable of producing visible color but not permanent
chromophore
simple benzene compounds that contain chromophores
chromogens
added to chromogen; alters the property of the chromogen by altering its shade; retain its color in the tissue
auxochrome
impart color that is permanent; composed of chromophore and auxochrome
dyes
coloring substance found in the acid component; basic cell structures have high affinity (picric acid & eosin)
acid dyes
found in basic component; acid structures have high affinity (methylene blue)
basic dyes
stains the cytoplasm and nucleus simultaneously and differentially; e.g. romanowsky dyes (giemsa stain and wright’s stain)
neutral dyes
most commonly used for histologic studies
hematoxylin (pH 2.5-2.9)
routinely used in H and E staining
aluminum hematoxylin
example of blueing agent
scott’s tap water and ammonia water
routinely used in nuclear staining; ripened with mercuric oxide
harris hematoxylin
nuclear stain in Pap’s; stains sex chromosomes; addition of glacial acetic acid gives a precise nuclear staining
harris hematoxylin
staining method of harris hematoxylin
regressive staining
excellent nuclear stain; stains mucin, recommended for bone and cartilage; not for frozen sections
ehrlich’s hematoxylin
added in ehrlich’s hematoxylin to slow oxidation and to prolong shelf life of hematoxylin
glycein
staining method of ehrlich’s hematoxylin
regressive staining
chemically ripened with sodium iodate
mayer’s hematoxylin
uses iron salts as both a mordant and ripening agent
iron hematoxylin
standard iron hematoxylin
heidenhain’s hematoxylin
for frozen sections
loyez hematoxylin
elastic fibers
verhoeff hematoxylin
for demonstration of granules of endocrine cells of alimentary tact; argryophil cells
lead hematoxylin
study of spermatogenesis
copper hematoxylin
red acid; routinely used as a counter stain after hematoxylin and before methylene blue
eosin
stains connective tissues and cytoplasm differently
eosin
most commonly used; soluble in water; yellow fluorescence
yellow (eosin Y)
deep red color
eosin B, erythrosyn B
soluble in ALCOHOL
eosin S, ethyl eosin
for connective tissues (collagen fibers)
acid fuschin- picric acid (van gieson’s stain)
basic acridine fluorochrome; discriminates dead and living cells
acridine orange (masson stain)
green fluorescence in acridine orange
DNA
red in acridine orange
red
for staining of hemoglobin
benzidine
used as counterstain for gram’s technique, for acid fast, for papanicolau method
bismarck brown
used for staining diphtheria organisms
bismarck brown
used as chromatin stain for fresh materials in smear preparations
carmine
best known as an indicator; stains elastic tissues, amyloid, myelin
congo red
stains amyloid in frozen sections, platelets in blood
crystal violet
used for staining of blood to differentiate WBCs
giemsa stain
stain used for metallic impregnation
gold sublimate
OLDEST STAIN
IODINE
stains microorganisms and fibrin in tissue sections
gram’s iodine
used as test for glycogen, amyloid, and corpora amylacea
lugol’s iodine
demonstrating mitochondria during supravital staining
janus green B
counterstain for Ascaris eggs, RBC, bacterial spores (bacillus and clostridium)
malachite green
common basic nuclear stain used with eosin
methylene blue
for demonstration cell granules and vacuoles of phagocytic cells
neutral red
stains elastic fibers (skin); for dermtological studies
orcein
demonstrates the fines and most delicate
orcein
used to stain fats
osmium tetroxide
counterstain for acid fuschin, connective tissue , cytoplasmic stain in contrast to basic dyes, counterstain for crystal violet
picric acid
colored salt of ferric ferrocyanide; used for the manufacture of paints; contrast stain, intravital staining of the circulatory system
prussian blue
used with osmic acid to fix and stain blood and glandular tissues
rhodamine B
used for identification of spirochetes, reticulum, fiber stains
silver nitrate
used as nuclear stain in fixed tissue, stain nissl granules or chromophilic bodies
toluidin blue
demonstrate neuroglia
victoria blue
property of tissues to be stained with fat or oil solunle dyes
sudanophilia
oil soluble dyes
Sudan Black B, Sudan IV, Sudan III
most sensitive of the oil soluble dyes
sudan black B
sudan black B stains
phospholipids and neutral fats
color of sudan black B
black/blue (sudan BLACK BLUE)
most commonly used; stains neutral fats (TAG)
Sudan IV
color of sudan IV
red
first sudan dye
sudan III
stains fat in CNS tissues; less deep, light orange stain
sudan III
stains neutral fats and lipofuscin
oil red O
stain for unsaturated fats in frozen section
osmic acid