Squeezing in Multivariate Spin Systems

In contrast to the canonically conjugate variates $q$,$p$ representing the position and momentum of a particle in the phase space distributions, the three Cartesian components, $J_{x}$,$J_{y}$, $J_{z}$ of a spin-$j$ system constitute the mutually non-commuting variates in the quasi-probabilistic spin distributions. It can be shown that a univariate spin distribution is never squeezed and one needs to look into either bivariate or trivariate distributions for signatures of squeezing. Several such distributions result if one considers different characteristic functions or moments based on various correspondence rules. As an example, discrete probability distribution for an arbitrary spin-1 assembly is constructed using Wigner-Weyl and Margenau-Hill correspondence rules. It is also shown that a trivariate spin-1 assembly resulting from the exposure of nucleus with non-zero quadrupole moment to combined electric quadrupole field and dipole magnetic field exhibits squeezing in cerain cases.Comment: 13 pages, 1 Table, Presented at ICSSUR-05, Franc

ISSN: xxxxx NOVEL SPECTROPHOTOMETRIC TECHNIQUE FOR THE ESTIMATION OF REDUCING SUGAR FROM WHEAT HUSK

ABSTRACT The mixture of alkaline copper tartarate and Potassium ferrocyanide was found to be useful in the Spectrophotometric determination of reducing sugar from wheat husk by hydrolysing the polysaccharide by varying the concentration of acid, temperature and time of exposure. The absorbance formed at 670 nm was proportional to the concentration of copper; with reference to Cu-glucose equivalence table quantitative estimation of reducing sugar is arrived. The novelty in this method is utilization of Cu (II) oxidative state instead of reduced Cu (I) for analysis which makes it different from usual standard methods. This method is rapid, convenient with a minimal relative percentage error

Spectral and cyclic voltammetric investigation of oxidized products of 10-4 `-(N-diethylamino)butyl]-2-chlorophenoxazine and its applications in redox titrimetry

10-4'-(N-diethylamino)butyl]-2-chlorophenoxazine (DBCP) undergoes a reversible one-electron oxidation with cerium (IV) to form a pink coloured radical cation DBCP+.] in the presence of stoichiometric amounts DBCP: Ce(IV)= 1:1] of the reactants. The radical cation underwent a second one-electron oxidation to form a brownish yellow coloured dication DBCP2+] in the presence of more than one equivalent of cerium(IV), which was characterized by UV-vis, IR and mass spectrometry. The cyclic voltammogram of DBCP exhibited two anodic waves at 721 mV and 1158 mV and two cathodic waves at 653 mV and 1076 mV at a scan rate of 24 mV/s. The peak at 721 mV corresponds to the oxidation of DBCP to the radical cation DBCP+.] and the second anodic peak at 1158 mV stands for the oxidation of the radical cation to the dication DBCP2+]. Bromine oxidizes DBCP to three products as evidenced by HPLC and the tentatively predicted structures based on the mass-spectral data support the formation of brominated oxidized products. In order to explore the analytical applications, the optimum conditions for the successful use of DBCP as a redox indicator in the macro and micro estimation of ascorbic acid, methionine, isoniazid, phenylhydrazine hydrochloride and biotin using chloramine-B as oxidant, have been developed. The indicator gives sharp and stoichiometric end-points

Hydrophobic interactions of phenoxazine modulators with bovine serum albumin

The interaction of 10-(3'-N-morpholinopropyl)phenoxazine MPP], 10-(4'-N-morpholinobutyl)phenoxazine MBP], 10-(3'-N-morpholinopropyl)-2-chlorophenoxazine MPCP], 10-(3'-N-piperidinopropyl)-2-chlorophenoxazine PPCP] or 10-(3'-N-morpholinopropyl)-2-trifluoromethylphenoxazine MPTP] with bovine serum albumin (BSA) has been studied by gel filtration and equilibrium dialysis methods. The binding of these modulators, based on dialysis experiments, has been characterized using the following parameters: percentage of bound drug (beta), the association constant (K-1), the apparent binding constant (k) and the free energy change (Delta F degrees). The binding of phenoxazine derivatives to serum transporter protein, BSA, is correlated with their octanol-water partition coefficient, log(10) P. In addition, effect of the displacing activities of hydroxyzine and acetylsalicylic acid on the binding of phenoxazine derivatives to albumin has been studied. Results of the displacement experiments show that phenoxazine benzene rings and tertiary amines attached to the side chain of the phenoxazine moiety are bound to a hydrophobic area on the albumin molecule

Hydrophobic interactions of phenoxazine MDR modulators with bovine serum albumin

The binding of 10-3'-(N-piperidino)propyl]-2-trifluoromethy]phenoxazine 1, 10- 3'-(beta -hydroxyethylpiperazino)propyl]-2-trifluoromethylphenoxazine 2, 10-4'-(N-diethylamino)butyl]-2-trifluoromethylphenoxazine 3, 10-4'-(N-piperidino)butyl]-2-trifluoromethylphenoxazine 4 and 10-4'-(N-diethylamino)butyl]-2-chlorophenoxazine 5 to bovine serum albumin (BSA) has been measured by gel filtration and equilibrium dialysis methods. The binding of these modulators to albumin has been characterized by the following parameters: percentage of bound drug (beta), the association constant (K-I), the apparent binding constant (k) and the free energy (DeltaF degrees). In addition, the displacing activity of hydroxyzine and acetylsalicylic acid on the binding of phenoxazine to albumin has been examined. The binding of phenoxazine derivatives to serum transporter protein, BSA, is correlated with their partition coefficients. The results of the displacing experiments reveal that the phenoxazine benzene rings and the tertiary amines attached to the side chain of the phenoxazine moiety are bound to a hydrophobic area on the albumin molecule