partition coefficient


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partition coefficient

n
(Chemistry) chem the ratio of the concentrations of a substance in two heterogenous phases in equilibrium with each other
References in periodicals archive ?
Perhaps the best telling parameter for penetration of a molecule is the so-called partition coefficient, expressed as:
The partition coefficient of a substance refers to its solubility in the air, blood and tissue.
"Partition coefficient of one variable theory has been employed In the past over one century, the two two-varaiable of 'stead region-migration region' theory has just started," says Prof.
The top five most modeled properties were boiling point (145), water solubility (131), octanol-water partition coefficient (110), melting point (67), and vapor pressure (65); together, these properties were reported in two-thirds of the articles within the given properties group (see Table 1 for the contributions made by other properties).
The simplest isotherm is the linear distribution coefficient (Kd), also called linear partition coefficient, is widely used to describe adsorption in soil [19].
(A) Partition coefficient ([V.sub.pc]): Partition coefficient ([V.sub.pc]) is an important indicator of fuzzy partition.
Sulfamethoxazole [4-Amino-N-(5-methyl-3-isoxazolyl) benzenesulfonamide], CAS 723-46-6, fusion range of 168-172[degrees]C, vapor pressure at 25[degrees]C of 6.93 x [10.sup.-]8 mmHg, dissociation constants pKa1 = 1.6 and pKa2 = 5.7, water/ethanol partition coefficient of 0.89, low solubility at 25[degrees]C in water, ethanol (1:50) and acetone (1:3); it dissolves in hydrochloric acid or in a sodium hydroxide solution by forming a soluble salt.
For the influence of crosslinker type to the removal efficiency and partition coefficient, 100 mg of the hydrogels were put into 50 mL of concentration of 80 mg [L.sup.-1] dye solutions and left for 48 h at 25[degrees]C.
where [lambda] is decay constant, [u.sub.t] is terminal velocity, H is partition coefficient, F is spray flow rate, [L.sub.r] is leakage rate, [R.sub.res] is filters recirculation rate, d is droplet diameter, V is containment volume, r is resuspension rate, S is containment-free surface, and P(t) is the time-dependent source term.
Heat Partition Coefficient. The heat generated by the brake is allocated to the brake disc and the friction plate based on the heat partition coefficients.
Determination of Octanol-Water Partition Coefficient. Octanol (50 mL) and distilled water (50 mL, pH 7.0) were mixed by oscillation at 25[degrees]C for 24 h.
where [D.sub.0] is the partition coefficient for a lattice site with a cation of ideal ionic radius and charge, [D.sub.i] is the partition coefficient of a trace ion i, [N.sub.A] is the Avogadro constant, [E.sub.s] is Young's modulus, and [r.sub.0] and [r.sub.i] are the ionic radii of the crystallographic site (i.e., [Ca.sup.2+] for calcite) and the substituting ion i (i.e., RE[E.sup.3+]), respectively.