Methods Of Study Flashcards
Fixative use for light microscopy is
Formalin, isotonic solution of 37% formaldehyde
Fixatives often use for electron microscopy
Formaldehído y glutaraldehido
Preserve and stains membrane lípids as well as proteins
Osmium tetroxide
Embedding materials that impart rígid consistensy
Paraffin( light microscopy) and plástic resins
Porcentaje de deshidratación del etanol
70% al 100%
The fully clear tissue is then place in An oven at
50-60 degrees
Are use to preserve tissue structure by crossing linking and denaturating proteins,inactivating enzimes and prevent autolysis
Fixatives
A hard block of tissue and paraffin is place in An instrument that cut it 1-10 micrometers thickness
Microtome
Biopsy frozen in liquid nitrogen is cut with a Microtome call
Cryostat
Cells such as nucleic acids with a net negative charge stain more readily with basic dyes and are name
Basophilic
Cationic components such as proteins with many ionized amino groups, have affinity for acid dyes
Acidophilic
Examples of basophilics
Toluidine blue, alcian blue and methylene blue and hematoxilin
DNA , RNA,GAGs are
Basophilics
Eosin , Orange G, and acid fuchsins are dyes?
Acid dyes
Of all staining methods, the most commonly is
Hematoxilin and eosin
Color in H&E for acid structures
Dark blue or purple color
Color of eosin with basic structures
Pink
Second staining method most commonly used
pAS
Help to distinguish extracellular tissue components netter than H&E
Trichomes
DNA can be specifically identified and quantified in nuclei using
Feulgen reactions
Produce a purple color with glucose or polysaccharides , glycogen, GAGs and glycoproteins
PAS
Fenómenos e distorsión y pérdida de componentes llamados
Artefactos
Cuatro tejidos fundamentales
Epitelial , conjuntivo muscular y nervioso
También denominado microscopio fotonico y es el que usamos al estudiar histologia
Microscopio optico