INDEX fractions

As the logarithm of 1-octanol-water partition coefficient (log P) describes the hydrophobicity of molecules and the retention of solutes in RP-HPLC depends on the hydrophobicity, a strong correlation can be expected between the log V value and the retention of solutes in RP-HPLC. Besides log P, a considerable number of physicochemical parameters have been tested for their capacity to predict retention in RP-HPLC. Thus, Snyder s polarity index, fraction of positively and negatively charged surface area, molecular bulkiness, nonpolar surface area, electron donor and acceptor capacity, various ster-ical parameters, and the energy of highest occupied molecular orbit have all been included in QSRR calculations. [Pg.19]

Crosslink index, fraction of mers participating in crosslinks multiplied by DPn of primary chains (Part 7). [Pg.162]

Two main definitions of bond order indices are reported below. Moreover, the term fractional bond order was suggested to refer to the inverse of any bond order index. Fractional bond order permits individual treatment of a and it molecular systems a bonds give simple graphs, while jt bonds introduce a weighted molecular framework with weights less than one [Randic et al, 1980]. [Pg.28]

Solubility parameter Hydrogen bond index Fractional polarity Nitro cellulose dil ratio Nitro cellulose dil ratio (J/cm ) /2 24.5... [Pg.184]

Auto ignition temperature Upper flammability limit Lower flammability limit Viscosity Refractive index Solubility in water Solubility of water Solubility parameter Hydrogen bond index Fractional polarity Nitro cellulose dil ratio Nitro cellulose dil ratio Surface tension Specific heat liquid Latent heat Dielectric constant Antoine constant A Antoine constant B Antoine constant C Heat of combustion UN number IMO classification ADR/RID classification UK exposure limits USA exposure limits German exposure limits EU classification EU risk phrases EU safety phrases... [Pg.185]