Titer
A titer is a way of expressing concentration. Titer testing employs serial dilution to obtain approximate quantitative information from an analytical procedure that inherently only evaluates as positive or negative. The titer corresponds to the highest dilution factor that still yields a positive reading. For example, positive readings in the first 8 serial twofold dilutions translate into a titer of 1:256 (i.e., 2−8). Titers are sometimes expressed by the denominator only, for example 1:256 is written 256.
The term has also two other, conflicting meanings. In titration, the titer is the ratio of actual to nominal concentration of a titrant, e.g. a titer of 0.5 would require 1/0.5 = 2 times more titrant than nominal. This is to compensate for possible degradation of the titrant solution. Second, in textile engineering, titer is a synonym for linear density.
Examples
A specific example is a viral titer, which is the lowest concentration of virus that still infects cells. To determine the titer, several dilutions are prepared, such as 10−1, 10−2, 10−3, ... 10−8.
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All These Lives
by: DaughtryDoesn't come down when she calls, "It's time for breakfast"
Momma can't get down those halls fast enough to see
Glass is sprayed across the floor from the broken window
She can't breathe anymore, can't deny what we know
They're gonna find you, just believe
You're not a person, you're a disease
All these lives that you've been taking
Deep inside, my heart is breaking
Broken homes from separation
Don't you know it's violation?
It's so wrong, but you'll see
Never gonna let you take my world from me
The world outside these walls may know you're breathing
But you ain't coming in, but you ain't coming in
Posters hung on building walls
Of missing faces
Months go by without the cause
The clues or traces
They're gonna find you, just believe
You're not a person, you're a disease
All these lives that you've been taking
Deep inside, my heart is breaking
Broken homes from separation
Don't you know it's violation?
It's so wrong, but you'll see
Never gonna let you take my world from me
The world outside these walls may know you're breathing
But you ain't coming in
Shed the light on all the ones
Who never thought they would become
A father, mother asking
Why this world can be so cold?
Doesn't come down when she calls
"It's time for breakfast"
The memories begin to fall
She asks, "When will I be free?"
All these lives that you've been taking
Deep inside, my heart is breaking
Broken homes from separation
Don't you know it's violation?
It's so wrong, but you'll see
Never gonna let you take my world from me
The world outside these walls may know you're breathing
But you ain't coming in
All these lives that you've been taking
Deep inside, my heart is breaking
All these lives that you've been taking
Deep inside, my heart is breaking
All these lives that you've been taking
Deep inside, my heart is breaking
The world outside these walls may know you're breathing
The world outside these walls may know you're breathing