@JISCMAIL.AC.UK] on behalf of Frank Murphy
[frankvmur...@gmail.com]
Sent: Wednesday, July 25, 2012 3:03 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] How to identify unknow heavy atom??
Dear Haytham,
It should be relatively simple (and quick) to determine the metal in your
sample employing
Shameless self plug:
http://scripts.iucr.org/cgi-bin/paper?fw5057
That was done with a crappy crystal in a relatively weak beamline. With
a good crystal one can get cleaner data.
Cheers.
Jose.
Jose Antonio Cuesta-Seijo, PhD
Carlsberg
On Tue, Jul 24, 2012 at 10:14 AM, Haytham Wahba haytham_wa...@yahoo.com wrote:
1- if i have anomalous peak of unknown heavy atom, How can i identify this
heavy atom in general. (different methods)
2- in my case, i see anomalous peak in heavy atom binding site (without any
soaking).
On Tuesday, July 24, 2012 10:22:18 am Nat Echols wrote:
On Tue, Jul 24, 2012 at 10:14 AM, Haytham Wahba haytham_wa...@yahoo.com
wrote:
1- if i have anomalous peak of unknown heavy atom, How can i identify this
heavy atom in general. (different methods)
2- in my case, i see anomalous
On Tue, Jul 24, 2012 at 10:33 AM, Ethan Merritt
merr...@u.washington.edu wrote:
As to the home source - no.
Neither Cu nor Zn has appreciable anomalous signal when excited with a
Cu K-alpha home source.
http://www.bmsc.washington.edu/scatter
An element's emission edge (Cu K-alpha in this
Hello
Actually, if the home source uses a copper tube, neither copper nor zinc have
much of an anomalous signal at that wavelength (the energy is below the
absorption edge for both).
The best way is to check the location of the absorption edge at the
synchrotron. Cu+ and Cu++ can be
Perhaps also exafs should be mentioned--I believe the various ion species,
redox states, and even binding geometry can be determined.
JPK
On Tue, Jul 24, 2012 at 12:37 PM, Roberts, Sue A - (suer)
s...@email.arizona.edu wrote:
Hello
Actually, if the home source uses a copper tube, neither
] How to identify unknow heavy atom??
Perhaps also exafs should be mentioned--I believe the various ion species,
redox states, and even binding geometry can be determined.
JPK
On Tue, Jul 24, 2012 at 12:37 PM, Roberts, Sue A - (suer)
s...@email.arizona.edu wrote:
Hello
Actually, if the home
I think it's done on a crystal itself, but others who know better than I
can comment.
JPK
On Tue, Jul 24, 2012 at 1:02 PM, Theresa Hsu theresah...@live.com wrote:
Does EXAFS requires same amount of samples as ICP-MS/ICP-AES?
Theresa
On Tue, 24 Jul 2012 12:55:31 -0500, Jacob Keller
Dear Haytham,
may I address your points (although some nice hints have already come
from previous replies)
1- if i have anomalous peak of unknown heavy atom, How can i identify
this heavy atom in general. (different methods)
To see anomalous peak I guess you have done the experiment at a
Dear Haytham,
It should be relatively simple (and quick) to determine the metal in your
sample employing either crystallized sample or solution using X-ray
fluorescence (http://en.wikipedia.org/wiki/X-ray_fluorescence) at any beamline
with a silicon drift detector
11 matches
Mail list logo
