The phrase "a weighting average" is not correct in English; it should be "a weighted average." You can use "a weighted average" when discussing statistical calculations that take into account the relative importance of different values.
Example: "To calculate the final grade, we used a weighted average of the exam scores and project grades."
Alternatives: "a weighted mean" or "a weighted calculation."
Chitosan used had a weight average molecular weight (Mw) of 220 kDa and was 85% deacetylated.
The obtained polymer has a weight average molecular weight of 273,800 with a polydispersity index of 2.35, good solubility and high thermal stability with a Tg of 176 °C.
At the optimum levels of control factors investigated, as high as 22.6 g/L EPS with a weight average MW of higher than 2 × 106 was produced.
The present study revealed that AGP in solution had a weight average molecular weight Mw of 1.86 × 106 g mol−1 and a radius of gyration Rg of 30 nm.
In this work, we synthesized poly(butylene suberate) (PBSub) with a weight average molecular weight of 3.64 × 104 g/mol from the monomers of butanediol and suberic acid via a two-step melt polycondensation method.
So we calculated the sales and purchasing values of calendar years as a weight average of two-year values, after adjusting the size of 2006 to suit that of 2007.
PG4 exhibits a weight average degree of polymerization of PW = 4,240, resulting in a contour length of Lc = 1,060 nm.
Subsequent measurement of the molecular weight yielded a weight average of 280 kDa and the size distribution given in Fig. 1.
When proteins adopt a monomer dimer equilibrium, the molecular mass, M, can be treated approximately as a weight average parameter (Mw).
Integration of size distribution for the main particle fraction yielded a weight average sedimentation coefficient s* = 16.8 ± 2.4S (s20,w = 17.8 ± 2.0S) and a frictional coefficient ratio f/f0 = 1.42 corresponding to a moderately elongated particle.
