Changes between Version 38 and Version 39 of TartuSchoolSasView

Timestamp:

Sep 16, 2018 6:29:32 AM (6 years ago)

Author:

ajj

Comment:

—

TartuSchoolSasView

@@ -11 +11 @@
 ||   [#section31 3.1 Background Information] ||
 ||   [#section32 3.2 Calculating Scattering Length Density] ||
-||   [#section33 3.3 Loading and Plotting the data] ||
-||   [#section34 3.4 Fitting the data] ||
+||   [#section33 3.3 Loading, Plotting, and Examining the data] ||
+||   [#section34 3.4 Guinier and Kratky Plots] ||
+||   [#section35 3.5 Fitting the data] ||
 || [#resources Resources] ||
 
@@ -234 +235 @@
 Physical properties of the DES components:
 ||= **Component**       =||= **Chemical Formula** =||=  **Molecular Volume (Å3)**       =||= **Density (g/cm3)** =||
-||d9-Choline Chloride|| C5H5D9NOCl      || 210.77 ||1.17||
-||d4-Urea||     CD4N2O  ||.75.55 ||     1.41||
+||d9-Choline Chloride|| C5H5D9NOCl      ||  210.77||  1.17||
+||d4-Urea||     CD4N2O  ||   75.55||    1.41||
 
 
@@ -249 +250 @@
 
 Try multiple ways and see if you get the same answer!
-}}}
-
-
-=== [=#section33 3.3 Loading and Plotting the data] ===
+
+Remember that in mixtures, we use the volume fraction of each component to calculate the overall scattering length density:
+
+[[Image(kemm37_volumefraction_sld.png, 200px)]]
+
+* The scattering length density of SDS is 0.3x10^-6^ Å^-2^. If you have time, convince yourself that this is the correct value.
+
+}}}
+
+=== [=#section33 3.3 Loading, Plotting, and Examining the data] ===
 
 You will now load the data into !SasView and make a plot in order to visually inspect the scattering curves.
@@ -293 +300 @@
 
 
-=== [=#section34 3.4 Fitting the data] ===
-{{{
-#!div style="background: lightblue"
-[=#task15 **TASK 15:**] Fitting the lowest concentration data.
+=== [=#section34 3.4 Guiner and Kratky Plots] ===
+
+
+{{{
+#!div style="background: lightblue"
+[=#task15 **TASK 15:**] Guiner Analysis
+
+Read the !SasView Documentation here : [http://www.sasview.org/docs/user/sasgui/guiframe/graph_help.html] which describes how to change the plotting scale and make linear fits.
+
+Select only 7p5hSDS_dChCldUrea_sub.txt in the data explorer and create a new plot of it.
+
+* Perform a guinier analysis
+ * Where is it likely to be linear for this data?
+
+* If you were to be looking at the lowest concentration data, what type of guinier analysis would you need to do?
+}}}
+
+
+{{{
+#!div style="background: lightblue"
+[=#task16 **TASK 16:**] Kratky Plot
+
+Select the lowest concentration data only in the data explorer by ensuring only 0p2hSDS_dChCldUrea_sub.txt has a check mark next to it and create a new plot of that data set.
+
+* Make a Kratky plot
+
+Repeat for the 7p5hSDS_dChCldUrea_sub.txt dataset.
+
+* What do these plots tell you about your data and initial evaluation?
+
+}}}
+
+=== [=#section35 3.5 Fitting the data] ===
+{{{
+#!div style="background: lightblue"
+[=#task17 **TASK 17:**] Fitting the lowest concentration data.
 
 Select the lowest concentration data only in the data explorer by ensuring only 0p2hSDS_dChCldUrea_sub.txt has a check mark next to it and click “Send to" fitting.
@@ -312 +351 @@
 {{{
 #!div style="background: lightblue"
-[=#task16 **TASK 16:**] Fitting the other data, starting with the 7.5 wt% data set.
+[=#task18 **TASK 18:**] Fitting the other data, starting with the 7.5 wt% data set.
 
 Repeat for other concentrations