The interaction of free fatty acids with cell membranes and lipid bilayers was studied by monitoring the emission polarization changes of the fluorescent probes 1,6-diphenyl-1,3,5-hexatriene (DPH) and 8-anilino-1-naphthalene sulfonate (ANS). It was found that cis unsaturated fatty acids incorporated into plasma membranes reduced DPH and increased ANS polarization, while trans-unsaturated and sa...

Ejaculated spermatozoa from bulls, boars and rams were subjected to thin-layer countercurrent partition in aqueous two-phase systems composed of dextran T500 and polyethylene glycol 6000 (PEG) in sucrose-based Hepes-buffered media. In the basal system, the great majority of spermatozoa tended to partition with the dextran-rich bottom phase; however, by including very low levels of phosphate, th...

A new method to extract the density of partition function zeroes (a continuous function) from their distribution for finite lattices (a discrete data set) is presented. This allows direct determination of the order and strength of phase transitions numerically. Furthermore, it enables efficient distinguishing between first and second order transitions, elucidates crossover between them and illu...

The chiral phase dependence of fermion partition function in spherically symmetric U(1) gauge field background is analyzed in two dimensional space-time. A well-defined method to calculated the path integral which apply to the continuous fermion spectrum is described. The one-to-one correspondence between the nonzero energy continuous spectra of two pertinent hamiltonians, which are defined by ...

We describe a method, called affinity partitioning, for the purification of proteins containing specific ligand binding receptor sites. This method adds specificity to the procedures for protein purification with aqueous polymer two-phase systems by introduction of a polymer derivative, coupled to an appropriate ligand. The addition of a polymer-ligand that partitions predominantly into one pha...

We extend the circle theorem on the zeros of the partition function to a continuum system. We also calculate the exact zeros of the partition function for a finite system where the probability distribution for the order parameter is given by two asymmetric Gaussian peaks. For the temperature driven first order transition in the thermodynamic limit, the locus and the angular density of zeros are...

Partitioning equilibria and their temperature dependence of chemicals between different environmental media are important in determining the fate, transport, and distribution of contaminants. Unfortunately, internally consistent air/water (K(AW)), 1-octanol/air (K(OA)), and 1-octanol/water (K(OW)) partition coefficients, as well as information on their temperature dependence, are scarce for org...

It is demonstrated that the statistical mechanical partition function can be used to construct various different forms of phase space distributions. This indicates that its structure is not restricted to the Gibbs–Boltzmann factor prescription which is based on counting statistics. With the widely used replacement of the Boltzmann factor by a generalised Lorentzian (also known as the q-deformed...

Polydimethylsiloxane (PDMS) is commonly used as the coated polymer in the solid phase microextraction (SPME) technique. In this study, the partition coefficients of organic compounds between SPME/PDMS and the aqueous solution were compiled from the literature sources. The correlation analysis for partition coefficients was conducted to interpret the effect of their physicochemical properties an...

Log Kow values for 14 heterocyclic nitrogen compounds (by traditional shake-flask method) were reported. Reverse phase–high-performance liquid chromatography (RP-HPLC) method and three estimation models—linear solvation energy relationship, molecular connectivity indices (MCIs), and quantum chemical descriptors—were used to study the partition mechanism and to establish the correlations of the ...