journal menu
![[Figure 5]](ju5087fig5mag.jpg)
|
|
Figure 5
(a) Log–log SANS plot of Symbiodinium algae extracted from coral analogue Aiptasia (the linear scale on the right-hand side belongs to the green curve – see below). Measurement at 20°C in 100% D2O. Small black circles are SANS data points. The blue curve is the log–log fit refined using the χ2 minimization method (see Section A4). χ2 = 4.31 (q = 0.008–0.2 Å−1). The red curve is the background function refined using the χ2 minimization method. The green curve is a linear plot after subtracting the background function (red curve) from the SANS data (scale on right-hand side). Error bars on the green curve are the 1σ uncertainty in intensity (dI) at each q. The SANS signal is well above the uncertainty in the green curve. (b) For every (q, I) pair in panel (a), the intensity I is multiplied by q2 to obtain q2I(q) versus q curves. This plot style aids in visualizing the maxima and minima from low to high q, and provides a direct comparison of the fitted curve after χ2 minimization. The close agreement between χ2 refined and visual fits for this sample provides confidence in applying visual fits for the other cases. Model parameters were first refined by visual iteration (Section A3); these values seeded the χ2 minimization described here. (c) Log–log plots of model components P(q) and S(q) used in the construction of the fit curve for Symbiodinium extracted from Aiptasia shown in panel (a). The red curve is the model form factor P(q) curve calculated using equation (3) ![[link]](../../../../../../logos/arrows/j_arr.gif){kind=small} with the parameters given in Table 2, and the blue curve is the model S(q) curve calculated using equation (A1) with the parameters given in Table 2. |
![[Figure 5]](ju5087fig5.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
Open 
access
access
