ribosome contained twice as many proteins as the bacterial The molecular weight distributions of the ribosomal proribosome. This work was undertaken to compare quantitatively teins from Escherichia coli, Micrococcus lysodeikticus, &othe molecular weight distribution and number of ribosomal proplasmic ribosomes of Euglena and mouse plasmocytoma teins from representative procaryotes and eucaryote...

A FI Zr-based catalyst of bis[N-(3,5-dicumylsalicylidene)-2′,6′­diisopropylanilinato]zirconium(IV) dichloride was prepared and used for polymerization of ethylene. The effects of reaction conditions on the polymerization were examined in detail. The increase in ethylene pressure and rise in polymerization temperature up to 35 oC were favorable for catalyst/MAO to raise the catalytic activity as...

2014 We consider a linear polymer melt where the chains are made by condensation of bifunctional monomers. In the very large distribution of molecular weights that is obtained one may distinguish typical and very large chains with different behaviours. Screening is effective in the former, which act as a (good) solvent for the latter. The cross-over molecular weight N * between the two classes ...

the molecular weight distribution of 4 commercial isotactic polypropylene (ipp) samples was estimated using rheological data. the dynamic moduli data, obtained from rheological measurements in linear viscoelastic region was used for calculation of relaxation time spectrum, h(τ) and then shear relaxation modulus, g(t). finally, applying thimm kernel function and relaxation modulus data in genera...

Poly(C9), the tubular 27 S complex forming the transmembrane channel of the membrane attack complex of complement, was purified to homogeneity by gel filtration and sucrose density gradient ultracentrifugation. The molecular weight of poly(C9) was determined by two independent methods in addition to sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis. First, sedimentation equilibriu...

Using a developed laser light-scattering (LLS) procedure, we accomplished the characterization of an unfractionated polyimide (UPI) in CHCl3 at 25°C. The Laplace inversion of precisely measured intensity–intensity time correlation function from dynamic LLS leads us first to an estimate of the characteristic line-width distribution G(G), and then to the translational diffusion coefficient distri...