I know the ng means nanogram
But I’m curious how would I say the above line of 2.1 ng/kg
For context I got it from this paragraph
a lethal dose of 1.3–2.1 ng/kg in humans
Would it be
2.1 nanogram per kilogram?
Also if I wanted to write that as a decimal number how would i write that?
“A lethal dose of one point three to two point one (or one and three tenths to two and one tenth) nanograms per kilogram in humans.”
So are they saying nanograms of the stuff per kilograms of the human?
In other words are they saying it’s a ratio compared to the weight of the person?
That is correct. The ratio is nanograms of substance to kilograms of bodyweight
Thank you
Yeah - the dose is the poison (if you drink enough water it becomes toxic), so if you are talking precisely you need to describe the concentration of a substance in which it is likely lethal to a person, and that’s typically expressed as mass of a substance per mass of bodyweight. A lot of the time you will also see this expressed as an “LD50” value; the dose at which you’d expect 50% of people to die. This accounts for the fact that people’s metabolisms vary quite widely.
~1ng/kg ~= 0.08ug for a typical (~80kg) person, which is a very tiny amount - whatever you are talking about is incredibly toxic.
A quick Google of the numbers says OP is likely talking about botulism so I guess they perhaps have been reading about Botox
Close was talking about Clostridium botulinum
Thank you
LD50 is per kg of rat by weight
0.0000000021g/kg
or 0.0000000000021kg/kg, if you wanted the same units both sides…
( I’m presuming this was your last-line’s request )
Fentanyl?
Way worse Clostridium botulinum
Most potent toxin known to science
Hell yeah. I know that one. Hold on, I’m gonna inject a very small portion of that into my face. Now you know I’m happy.
