Size exclusion chromatography afforded a facile approach to quantify the mass of the unattached polymer, and provide a substantial refinement to estimates of chain graft density beyond traditionally-used approaches, such as thermogravimetry.
A revised estimate of β chain repertoire size derived from deep TCR-seq data using the unseen species model [ 25] was 3 to 4 million [ 7], and the deepest TCR-seq experiment so far recovered 1.3 million [ 9] distinct TCR β chain sequences from a single individual, which places a directly measured lower limit on diversity.
We choose to model all side chains in the most probable conformation; we believe that a reasonable estimate of the side chain's position can be made based on the main chain coordinates and prior knowledge about possible rotamers.
Ahmed and Xing created TESLA (Ahmed and Xing, 2009), and Song, Kolar and Xing proposed KELLER (Song et al., 2009a), to estimate a chain of evolving networks over time.
In contrast, the higher concentration could trap loosely entangled chains in amorphous layers, providing for an ease of chain relaxation estimated by 1H-NMR analysis.
The polymers obtained were converted to poly methyl methacrylate)s by acid hydrolysis reaction followed by methyl esterification with diazomethane to estimate the chain tacticity of the original polymers by 1H- and 13C-n.m.r.
The degree of chain overlap was estimated by the ratio of twice the polymer's Flory radius in a theta solvent to its interchain distance, which should be located in the strongly overlapping brush regime (2 Rf/l > 1.4).
An alternative approach to characterizing TMF in a prospective way would be to make use of food-web model ecosystems such as those used by Metcalf et al. [98] to provide a physical model of trophic transfer (algae-arthropods-fish) and an estimate of magnification in the food-chain.
The model is able to replicate xylose and furfural profiles to a high degree of accuracy, and it produces significantly better estimates of the longer chain oligomer profiles in comparison to those in Figure 3.
Most published estimates of the average chain length of mammalian glycogen suggest that it lies between 12 and 18 glucose units (Illingworth et al., 1952), in line with our value of 13 ± 1 for bovine liver glycogen but making our value of 23 ± 3 for the rat liver glycogen seem high.
