2a7e: Difference between revisions

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==Overview==

Complete and highly redundant data sets were collected at different, wavelengths between 0.80 and 2.65 A for a total of ten different protein, and DNA model systems. The magnitude of the anomalous signal-to-noise, ratio as assessed by the quotient R(anom)/R(r.i.m.) was found to be, influenced by the data-collection wavelength and the nature of the, anomalously scattering substructure. By utilizing simple empirical, correlations, for instance between the estimated deltaF/F and the expected, R(anom) or the data-collection wavelength and the expected R(r.i.m.), the, wavelength at which the highest anomalous signal-to-noise ratio can be, expected could be estimated even before the experiment. Almost independent, of the nature of the anomalously scattering substructure and provided that, no elemental X-ray absorption edge is nearby, this optimal wavelength is, 2.1 A.

Complete and highly redundant data sets were collected at different wavelengths between 0.80 and 2.65 A for a total of ten different protein and DNA model systems. The magnitude of the anomalous signal-to-noise ratio as assessed by the quotient R(anom)/R(r.i.m.) was found to be influenced by the data-collection wavelength and the nature of the anomalously scattering substructure. By utilizing simple empirical correlations, for instance between the estimated deltaF/F and the expected R(anom) or the data-collection wavelength and the expected R(r.i.m.), the wavelength at which the highest anomalous signal-to-noise ratio can be expected could be estimated even before the experiment. Almost independent of the nature of the anomalously scattering substructure and provided that no elemental X-ray absorption edge is nearby, this optimal wavelength is 2.1 A.

==About this Structure==

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[[Category: Mueller-Dieckmann, C.]]

[[Category: Panjikar, S.]]

[[Category: Tucker, P.A.]]

[[Category: Tucker, P A.]]

[[Category: Weiss, M.S.]]

[[Category: Weiss, M S.]]

[[Category: a-dna]]

[[Category: double helix]]

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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:24:20 2008''

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@@ Line 4: / Line 4: @@
 ==Overview==
-Complete and highly redundant data sets were collected at different, wavelengths between 0.80 and 2.65 A for a total of ten different protein, and DNA model systems. The magnitude of the anomalous signal-to-noise, ratio as assessed by the quotient R(anom)/R(r.i.m.) was found to be, influenced by the data-collection wavelength and the nature of the, anomalously scattering substructure. By utilizing simple empirical, correlations, for instance between the estimated deltaF/F and the expected, R(anom) or the data-collection wavelength and the expected R(r.i.m.), the, wavelength at which the highest anomalous signal-to-noise ratio can be, expected could be estimated even before the experiment. Almost independent, of the nature of the anomalously scattering substructure and provided that, no elemental X-ray absorption edge is nearby, this optimal wavelength is, 2.1 A.
+Complete and highly redundant data sets were collected at different wavelengths between 0.80 and 2.65 A for a total of ten different protein and DNA model systems. The magnitude of the anomalous signal-to-noise ratio as assessed by the quotient R(anom)/R(r.i.m.) was found to be influenced by the data-collection wavelength and the nature of the anomalously scattering substructure. By utilizing simple empirical correlations, for instance between the estimated deltaF/F and the expected R(anom) or the data-collection wavelength and the expected R(r.i.m.), the wavelength at which the highest anomalous signal-to-noise ratio can be expected could be estimated even before the experiment. Almost independent of the nature of the anomalously scattering substructure and provided that no elemental X-ray absorption edge is nearby, this optimal wavelength is 2.1 A.
 ==About this Structure==
@@ Line 14: / Line 14: @@
 [[Category: Mueller-Dieckmann, C.]]
 [[Category: Panjikar, S.]]
-[[Category: Tucker, P.A.]]
+[[Category: Tucker, P A.]]
-[[Category: Weiss, M.S.]]
+[[Category: Weiss, M S.]]
 [[Category: a-dna]]
 [[Category: double helix]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jan 29 17:56:04 2008''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:24:20 2008''