Particle Size: Daltons and Microns

http://www.news.cornell.edu/stories/May05/DNAcount.ws.html

relation between dalton and micron

hi this is ramakrishna.\

pls clarify my doubt that is relation between Dalton and Micron

Hello DVader1000,

Have a look here:

http://www.thelenchannel.com/1conv.php

Use your Browser's "Find" to quickly locate alphabetically.....

Wow! Thanks!

Double wow! and also thanks.

Okay, thanks everyone.

A Dalton is a measure of mass whereas a Micron is a measure of distance.

The Dalton

The Micron

They are not peas but an apple and an orange.

Okay, noted. Thanks.

No relation, except that they are both units of measure.

Da (Dalton) is a the mass of a single molecule or atom. it is usually used to measure the mass of organic materials and is 1 twelves (1/12) of the mass of C12. it is also called AMU- atomic mass unit. and is approximately 1.6x10^-24gr.

Micrometer or -μm- is a measurement of distance, and is 1 millionth (1.0x10^-6m) of a meter. Same goes for μF, μH, or μHuman, (also AKA Chavez).

Micron without any designator,(as per your post) is a natural number and is 1.0x10^-6.

Hope this clears the situation.

Wangito

Okay, thanks.

I am wondering the same thing, because at my lab we have filters with pores designated to be a certain size in microns and then there are filters which are rated to allow proteins of a certain size to pass through (e.g. 30KD, 100KD, 300KD, etc.)

Although there is a general relationship between mass and size, I am not sure of the approximation that can be made between the two. Because the majority of proteins are not spherical there also needs to be a knowledge of the general shape of the protein. I assume this relates to other areas of science as well, and, in a likewise manner, you need to have a good idea of the shape and composition of the object you are studying to make an accurate conversion from mass in Daltons to Meters.

Hi all. I realize this thread has been dead for years (maybe there's a new one) but I found this relationship to respond to the most recent poster's questions (my applications have also been trying to tie in membrane porosity molecular weight cutoffs (MWCO) measured in daltons to the microns used in water quality chemistry... (0.45 um being the standard for dissolved vs suspended analytes). I'm not sure if this equation is empirically derived or what but ths is what I've found...

Radius_min = 0.66*Daltons^0.33333

Where Rmin = nanometers and Daltons are, well, daltons

Referenced here...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3055910/