\[ \begin{array}{lll} \hline \textbf{Symbol} & \textbf{Meaning} & \textbf{Unit} \\ \hline A, Abs & \text{absorbance} &\\ \beta & \text{density gradient constant} &\\ \lambda & \text{wavelength} &nm\\ \sigma & \text{standard deviation}& \sigma\\ \bar\nu & \text{partial specific volume} & \\ \omega & \text{angular velocity} &rad/s \\ c & \text{sample concentration}&\\ c_{0} & \text{initial sample concentration} &\\ D & \text{diffusion coefficient} &\\ \epsilon & \text{molar absorptivity} &\\ f & \text{frictional coefficient} &\\ f/f_{0}, k & \text{frictional ratio} &\text{unitless} \\ F_{b} & \text{bouyant force}& N\\ F_{f} & \text{frictional force }& N \\ F_{c} & \text{centrifugal force}& N \\ I & \text{intensity of light}&\\ J & \text{fringes} & \\ K & \text{Temperature}& K\\ m & \text{mass of sample}& \\ M & \text{molar mass} &\text{Da} \\ n & \text{refractive index} &\text{unitless}\\ r & \text{radial distance from axis of rotation} &\\ s & \text{sedimentation coefficient} & s\\ S & \text{Svedberg unit} & 1 \times 10^{-13}~\text{s}= 1~S\\ t & \text{experimental time}&s\\ v & \text{sedimentation velocity} &\\ V & \text{volume} & ml^{3}\\ \hline g & \text{acceleration due to gravity}& 9.810~\text{m s}^{-2} \\ k_{B} & \text{Boltzmann constant} & 1.3806 \times 10^{-23} ~\text{m}^{2}~ \text{kg}~ \text{s}^{-2}~ \text{K}^{-1}\\ N_{A} & \text{Avogadro's number} & 6.0221 \times 10^{23}~\text{mol}^{-1}\\ R & \text{universal gas constant} & 8.3144 ~\text{J}~\text{mol}^{-1}~\text{K}^{-1}\\ \hline g(s) & \text{differential sedimentation coefficient distribution}& \\ G(s) & \text{integral sedimentation coefficient distribution}&\\ w(M) & \text{differential molar mass distribution} & \\ W(M) & \text{integral molar mass distribution} &\\ \end{array} \]

\[ \begin{array}{ll} \text{2DSA} & \text{2-dimensional spectrum analysis} \\ \text{ABDE} & \text{analytical buoyant density equilibrium}\\ \text{ASTFEM} & \text{} \\ \text{AUC} & \text{analytical ultracentrifugation} \\ \text{CCH} & \text{Canadian Center for Hydrodynamics} \\ \text{CI} & \text{confidence interval} \\ \text{DLS} & \text{dynamic light scattering} \\ \text{GA} & \text{genetic algorithm} \\ \text{GMP} & \text{good manufacturing practices} \\ \text{L-M} & \text{Levenberg- Marquardt}\\ \text{MWL} & \text{multi-wavelength} \\ \text{NNLS} & \text{non-linear(ly constrained) least squares}\\ \text{PCSA} & \text{parametrically constrained spectrum analysis}\\ \text{PM} & \text{photomultiplier} \\ \text{RMSD} & \text{root mean square deviation}\\ \text{RCF} & \text{relative centrifugal field }\\ \text{RPM} & \text{revolutions per minute} \\ \text{SE} & \text{sedimentation equilibrium}\\ \text{SNR} & \text{signal-to-noise ratio}\\ \text{SV} & \text{sedimentation velocity}\\ \text{UV} & \text{ultra-violet} \\ \text{vHW} & \text{van Holde-Weischet} \\ \end{array} \]