Hematein
Hematein (US spelling) or haematein is an oxidized derivative of haematoxylin, used in staining. Haematein must not be confused with haematin, which is a brown to black iron-containing pigment formed by decomposition of haemoglobin. In the Colour Index (but nowhere else), haematein is called haematine, a confusing word that wrongly implies that the compound is an amine.
Hematein exhibits indicator-like properties, being blue and less soluble in aqueous alkaline conditions, and red and more soluble in alcoholic acidic conditions. Dissolved haematein slowly reacts with atmospheric oxygen, yielding products that are not useful.
In acidic solutions, complexes of hematein with metals (usually aluminium or iron, but also chromium, zirconium and several others) are used as biological stains. Aluminium-haematein (haemalum) is the "routine" stain for cell nuclei in sections of human and other animal tissues. Metal-haematein stains are available also for objects other than nuclei, including myelin sheaths of nerve fibres and various cytoplasmic organelles. The color of the stained objects depends on the salt used. Aluminium-haematein complexes are usually blue, whereas ferric complexes are very dark blue or black.
Podcasts:
-
by Madonna
-
by David Wilcox
-
by Joe Jackson
-
by Wishbone Ash
-
by Chamillionaire
-
by Point Of Grace
-
by Big Sean
-
by Badlands
-
by Wheatus
-
by Madcap
-
by Kilians
-
by Snickers & The Chicken Fighter
-
by Bucky Covington
-
by Larger Than Life
-
by Ana Popovic
-
by Akira Yamaoka
-
by Calvin Coolidge
-
by Stealing O'neal
-
by Mirrors
-
by Izzy Stradlin
-
by Elliott Murphy
Hey You
by: MadonnaHey you, don't you give up
It's not so bad
There's still the chance for us
Hey you, just be yourself
Don't be so shy
There's reasons why it's hard
Keep it together, you'll make it alright
Our celebration is going on tonight
Poets and prophets would envy what we do
This could be good, hey you
Hey you, open your heart
It's not so strange
You've got to change this time
Hey you, remember this
None of it's real including the way you feel
Keep it together, we'll make it alright
Our celebration is going on tonight
Poets and prophets would envy what we do
This could be good, hey you
Save your soul, little sister
Save your soul, little brother
Hey you, save yourself
Don't rely on anyone else
First love yourself
Then you can love someone else
If you can change someone else
Then you have saved someone else
But you must first love yourself
Then you can love someone else
If you can change someone else
Then you have saved someone else
But you must first
Hey you, there on the fence
You've got a choice
One day, it will make sense
Hey you, first love yourself
Or if you can't
Try to love someone else
Keep it together, we'll make it alright
Our celebration is going on tonight
Poets and prophets will envy what we do
This could be good, hey you
First love yourself
Then you can love someone else
If you can change someone else
Then you have saved someone else
But you must first love yourself
Then you can love someone else
If you can change someone else
Then you have saved someone else