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Cat unit

Cat unit

The dose of a drug (per kilogram of body weight of cat) which is just large enough to kill a cat when administered intravenously; was applied in the standardization of digitalis materials.


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Diffusion and Fick's law

... as the distance of the diffusion pathway increases. All this is tied together using a diffusion constant for substance A into B, which has units for length^2 and time^-1 and is a negative number to keep the diffusion flux value positive. So Fick's law is all about the amount of substance ...

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by Scotsgofree
Sat Oct 25, 2014 3:10 pm
 
Forum: Cell Biology
Topic: Diffusion and Fick's law
Replies: 1
Views: 1387

A dilution question about RNA

... the pellet in 50 uL water. I ve measured the concentration and it was 3313 ng/uL (Around 165 ug). Now my next step is DNase treatment. It says 1 unit of enzyme for 1 ug of RNA in 10 ul reaction mix. I would like to dilute my RNA to 100 ug and use 100 unite enzyme in 1000 uL reaction mix. Is this ...

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by golgicik
Mon Feb 03, 2014 6:30 pm
 
Forum: Molecular Biology
Topic: A dilution question about RNA
Replies: 1
Views: 1584

how are genes the unit of replication?

Hi, question here, and I hope I phrase this correctly: I understand that genes are the unit of replication in natural selection. But aren't traits ultimately stored in groups of genes? And is it not traits that are selected? So, if it's traits that are selected, how ...

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by johnkq
Wed Jan 29, 2014 1:58 pm
 
Forum: Genetics
Topic: how are genes the unit of replication?
Replies: 2
Views: 2148

How to calculate the transpiration rate based on exp. data

... on the rate of transpiration of plant. Here are the data obtained. My problem is how can I calculate the transpiration rate which end up with a unit of " g/cm2/minute " ? The type of potometer used can be see here: http://bit.ly/1gGUdqs Thanks.

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by tancheeping
Mon Dec 09, 2013 12:49 pm
 
Forum: Botany Discussion
Topic: How to calculate the transpiration rate based on exp. data
Replies: 0
Views: 1727

The Selfish Gene

... argues that it is the genes who are 'competing' to survive, does he not? But what exactly is a gene? My understanding was it was the hereditary unit of information in an organism (in each cell?), and genes tell an organism how to form, what traits and characters it should have. But a gene is ...

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by NathanCroftonBond
Fri Nov 01, 2013 1:07 am
 
Forum: Evolution
Topic: The Selfish Gene
Replies: 2
Views: 3276
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