Bis(μ-4-bromo-benzoato)-κO,O':O';O:O,O'-bis-[μ-1,3-bis-(pyridin-4-yl)propane-κN:N']bis-[(4-bromo-benzoato-κO,O')cadmium].

The dinuclear complex, [Cd(2)(C(7)H(4)BrO(2))(4)(C(13)H(14)N(2))(2)], lies on a twofold rotation axis crossing midway between the two metal atoms. The Cd(II) cation is seven-coordinated with a geometry that can be considered as distorted penta-gonal bipyramidal, with the N atom of the N-heterocyclic units occupying the apical sites and the O atoms of the 4-bromo-benzoate units in the equatorial plane. The middle methyl-ene group of the 1,3-bis-(4-pyrid-yl)propane ligands is located outside of the twofold rotation axis and consequently is disordered over two sites around this symmetry element with fixed occupancies factors of 0.

Investigation on the interaction of prulifloxacin with human serum albumin: a spectroscopic analysis.

The interaction between prulifloxacin (PUFX) and human serum albumin (HSA) was investigated under simulated physiologic conditions with fluorescence spectra. The fluorescence quenching process of HSA may be mainly governed by a static quenching mechanism. The apparent binding constant K(b) between PUFX and HSA at different temperatures were 2.

[Spectrophotometric determination of deoxyribonucleic acid by its quenching effect on acridine orange].

Based on the reaction of acridine orange with deoxyribonucleic acid (DNA), and under the optimized condition, a novel method to determine the DNA was developed with the spectrophotometry. The absorbance of acridine orange at the maximum absorption wavelength of 444 nm responded to the concentration of DNA negatively with excellent linearity. It has an upper linear limit concentration of 8.

[Study on determination of trace nitrite and reaction mechanism by two-wavelength negative absorption-catalytic spectrophotometry].

A new method was proposed for the determination of trace nitrite by two wavelength negative absorption catalytic spectrophotometry based on the catalysis of nitrite on the oxidation fading reaction of acridine orange by potassium bromate in phosphoricacid medium. The additive value of negative absorbances at two wavelengths was linear to the nitrite concentration in the range of 1.0 x 10(-5)-5.

[Studies on the interaction between RNA with methyl violet and determination of RNA by spectrophotometry].

An analytical method for the determination of ribonucleic acid was established by spectrophotometry. At maximum absorption wavelength for methyl violet in the B-R buffer solution, and under the best conditions, the degree of decrease of the absorbance was linear with the amount of ribonucleic Acid. It was a new and preferable approach for the determination of ribonucleic Acids.

[Multi-wavelength negative absorption fading spectrophotometry to determine trace nitrite and it's mechanism].

Using negative absorption rectifyingtechniquie, the authors investigated spectra of the reaction of nitrite with acridine yellow in 1.0 mol x dm(-3) (1 dm = 10 cm = 0.1 m) hydrochloric medium.