Structural studies of olive oil–water–biosurfactants mixtures are most attracting for several academic as well as industrial significances. Thus, densities (ρ), viscosities (η), and surface tensions (γ) of cetylpyridinium chloride (CPC) and bromide (CPB), cetyltrimethylammonium bromide (CTAB) and egg-phosphatidylcholine (EPC) biosurfactants (BS) 2–10mmkg−1 in olive oil+water mixture in 2mmkg−1 interval at 310.15K are reported. The densities were for apparent molal volume (Vϕ/10−6m3mol−1), η and γ determinations. The viscosities were fitted in extended Jones–Doles equation for intrinsic viscosity (B, kgmol−1) and slope (D, kgmol−1)2 derivation. The γ and Vϕ data were regressed for their limiting γ0 andVϕ0 data and the SEMs were illustrated surface morphology. The EPC caused maximum oil–water dissolution as compared to other surfactants. Intramolecular multiple force theory [IMMFT] is proposed to explain molecular interactions of olive oil–water–EPC mixtures with a possible correlation of surface and bulk reorientations with microstructures depicted with SEM. Frictional and cohesive forces as Friccohesity have been noted as driving forces to assert for validity of the IMMFT model and its link with SEM.

Densities (/103kgm-3), viscosities (/0.1Nsm-2) and surface tension (/mNm-1) of aqueous 0.005 to 0.02molL-1 mannitol, glucose and fructose at an interval of 0.005molL-1 and the 0.02, 0.025, and 0.03v% aqueous geraniol oil were studied. The similar carbohydrates were also studied with 0.025v% aqueous geraniol. TEM were recorded for sizes of molecules for analysis of probable energy consumption in flow through a capillary of Survismeter, like blood capillaries. The values were used for viscosities () and surface tensions (). The were fitted with extended Jones-Dole equation for B/Lmol-1 and D/(Lmol-1)2 coefficients to explain carbohydrate-geraniol interactions. The B and values illustrate structural behavior of carbohydrates irrespective of the compositions. These data analyze hydrophilic and hydrophobic interactions of geraniol and carbohydrates where electron micrographs depict shortening of sizes and intermolecular distances with geraniol. The size with and without geraniol remained from 0.019-0.035nm and 0.016-0.038nm, respectively. The geraniol increased the densities and decreased the surface tension to almost one half of the binary systems with an effective intermixing.

Apparent molar volumes (V-phi) and viscosities (eta) for 0.00005 to 0.0004 kg.mol(-1) (50 to 400 mu mol kg(-1)) aqueous methotrexate ( MTX), gram ( Gp) and soya bean ( SBp) proteins, and similar compositions of Gp and SBp each in 50 to 400 mu mol kg(-1) aqueous MTX were determined at 298.15, 303.15 and 308.15K. The V-phi values are positive except aqueous MTX and listed as SBp > Gp > MTX in aqueous and SBp > Gp in MTX solutions, respectively. It infers weaker hydrophobic heteromolecular interaction of SBp in binary and ternary systems. The higher h values of SBp and Gp in MTX than those of aqueous MTX prove strengthening of hydrophobic interactions of proteins by MTX. It illustrates the conformational changes of proteins; slightly higher V-phi values of SBp than of Gp. The MTX confirm higher structural activity in biological process. The V-phi(0) of MTX increases with K and decrease with composition. But with compositions the values continuously decrease with lower magnitude.

In present work, the effects of temperature on the conductance behaviour of titanium (laurate, myristate, palmitate and stearate) in benzene + cyclohexane mixtures were studied. Attempts have been made to determine critical micelle concentration dissociation constant (K), molecular conductance and infinite dilution (lambda(infinity)) heat of dissociation (Delta H degrees) and activation energy of conductance (Delta E-lambda) of these soaps under different conditions.

Surface tension of titanium soaps solutions in mixed organic solvents has been measured at 313 K and the data have been discussed on the basis of Langmuir's approximate equationgamma = gamma(0) (1 + x ln center dot gamma) - gamma(0) x ln cThe critical micelle concentration (CIVIC) values obtained from gamma -log C plots, decrease with increasing chain length of soap. Constant X depends on chain length of soap. Constant gamma above CIVIC increase with increasing chain length, but do not show any definite trend above this concentration. Surface alloys covered by the soap micelles formed by male of soap have also been evaluated.

Densities (ρ) of glycine, alanine and leucine in aqueous solutions of potassium chloride (KCl) (0.01–0.10 mol kg−1) have been measured at 310.15 K. Apparent molar volumes (Vϕ), limiting partial molar volumes (Vϕ0) and group contributions to partial molar volumes have been determined for the amino acids. The trends of transfer volumes (ΔVϕ0) have been interpreted in terms of solute–cosolute interactions on the basis of a cosphere overlap model. Pair and triplet interaction coefficients have also been calculated from transfer parameters.

Precise densities and viscosities at 298.15, 303.15, and 308.15 K for solutions of nicotine in water and in 0.02 mmol aqueous ethyl alcohol were measured for limiting apparent molal volume and B-coefficients calculations, respectively. These data are rationalized to illustrate hydrophilic and hydrophobic interactions between various functional groups present in these solutions.

The formation constants, βMAL, for the reaction VO2+ + A− + L2−⇌ VOAL− [where HA = picolinic acid and H2L = salicylic or 5-sulphosalicylic acid] have been determined at 30 ± 1° (μ = 0.1, KNO3). Potentiometric evidence is presented for the simultaneous addition of both ligands to the metal ion to form the 1:1:1 ternary complex.