Aldehyde Fixatives

Question 1

percent of formalin that is most widely used

Answer 1

10% formalin

Question 2

for central nervous tissue and general post-mortem tissues for histochemical examination

Answer 2

10% formal saline

Question 3

formaldehyde should be changed for every?

Answer 3

3 months

Question 4

demonstrates fats and mucin

Answer 4

10% formol saline

Question 5

Best general tissue fixative

Answer 5

10% Neutral-Buffered Formalin

Question 6

karnovksy’s fixative composed of?

Answer 6

parformaldehyde + glutaraldehyde

Question 7

best fixative for tissues containing iron pigments and for elastic fibers

Answer 7

10% Neutral-Buffered Formalin

Question 8

excellent medium in which to store whole blocks of tissue

Answer 8

formalin sodium acetate solution

Question 9

recommended for the preservation of lipids, especially phospholipid

Answer 9

10% formal saline

Question 10

excellent for many staining procedures including silver reticulum methods

Answer 10

Formol-Corrosive

Question 11

nuclear studies of bacteria

Answer 11

zenker’s formalin solution

Question 12

recommended for surgical, post-mortem and research specimen

Answer 12

10% neutral buffered formalin

Question 13

use in rapid diagnosis, fix sputum good for glycogen

Answer 13

formalin alcohol solutin/gendres

Question 14

for light microscopy in resin embedding and section for electron microscopy

Answer 14

karnovksy’s fixative

Question 15

Nuclear Fixatives

Answer 15

Bouin’s fluid
Flemming’s fluid
Newcomer’s fluid
Carnoy’s fluid
Heidenhain’s Susa

Question 16

excellent fixative for liver, spleen, connective tissue fibers and nuclei

Answer 16

zenker’s formalin solution

Question 17

preserves enzymes and nucleoproteins

Answer 17

10% formal saline

Question 18

most commonly used fixative

Answer 18

formaldehyde

Question 19

best fixative for frozen section

Answer 19

10% Neutral-Buffered Formalin

Question 20

Histochemical Fixatives

Answer 20

Formal Saline 10%
Absolute Ethyl Alcohol
Newcomer’s Fluid
Acetone

Question 21

Cytoplasmic Fixatives

Answer 21

Helly’s fluid
Orth ‘s fluid
Regaud ‘s fluid (Muller ‘s fluid)
Flemming’s fluid without acetic acid
Formalin with “post-chroming”

Question 22

paraformaldehyde is formed due to?

Answer 22

white powders deposits formed due to long storage in cold place

Question 23

ideal for most staining techniques, including silver impregnation

Answer 23

10% formal saline

Question 24

how can the formation of paraformaldehyde retarded

Answer 24

addition of 10% methanol to formalin solution

Question 25

excellent fixative for brain tissues

Answer 25

formalin ammonium bromide solution

Question 26

most effective aldehyde for protein cross linking

Answer 26

gluatraldehyde