Red single crystals of AgTl3(Cr2O7)2 were prepared via high oxygen pressure synthesis as well as by hydrothermal autoclave techniques. Initially, AgTl3(Cr2O7)2 was obtained from a reaction of stoichiometric mixtures of Ag2O, Cr and TlNO3 under elevated oxygen pressures. Following an optimized approach, the title compound can be synthesized at mild hydrothermal conditions, starting from AgNO3, T...

Feces from western barred bandicoots, Perameles bougainville, examined during routine monitoring of captive breeding colonies and wild populations were frequently found to contain oocysts. Fecal oocysts from 1 individual housed at Kanyana Wildlife Rehabilitation Centre were allowed to sporulate in 2% potassium dichromate (K2Cr2O7) at room temperature. Sporulated oocysts are subspheroidal 18.8 X...

Different chemical formulations for the synthesis of highly intercalated graphite bisulfate have been tested. In particular, nitric acid, potassium nitrate, potassium dichromate, potassium permanganate, sodium periodate, sodium chlorate, and hydrogen peroxide have been used in this synthesis scheme as the auxiliary reagent (oxidizing agent). In order to evaluate the presence of delamination, an...

Hexavalent chromium (Cr [VI]) genotoxicity was studied using fish micronucleus analysis in peripheral blood erythrocytes from Pimephales promelas, the fathead minnow. Forty-five- to 60-d-old fish were used to assess the spontaneous level of genotoxic damage. The genotoxic effect of Cr (VI) obtained from potassium dichromate (K2Cr2O7) in tests performed for 7-, 14-, and 21-d exposure periods was...

Chromium oxide nanoparticles were synthesized by the reduction of potassium dichromate solution with Mukia Maderaspatana plant extract. In electrochemical methods, Cr2O3 nanoparticles were synthesized by two ways, using platinum (Pt) electrodes and K2Cr2O7 solution with H2SO4 as medium in the first case. And chromium doped platinum electrode (Pt/Cr) in presence of NaHCO3 solution in second case...

A simple, rapid, and accurate spectrophotometric flow-injection method was developed for the determination of sorbic acid in wines based on the oxidation of sorbic acid with K2Cr2O7/H2SO4 at 1008C, followed by reaction of the resulting malonaldehyde with thiobarbituric acid, also at 1008C, to give a red product, the absorbance of which is measured at 532 nm. The method requires no prior distill...

In this present study, an attempt was taken to investigate the antibacterial activity of Nyctanthes arbor tristis. The seed and fruit extracts were used for their antibacterial screening. Melanin content and stability in fruits and seeds were studied with various factors like temperature, oxidants and metal ions. Chloroform and ethyl acetate extracts of fresh leaf, seeds and fruits were shown s...

The aim of this study was to determine the prevalence of coccidia species in calves in the region of Yüksekova (Hakkari) between March 2004 and July 2004. During this period fecal samples were collected from the rectum of 92 calves. Eimeria spp. and Isospora spp. oocysts were found in eighty-two (89.13%) out of a total of 92 calves. A solution of 2.5% potassium dichromate (K2Cr2O7) was added to...

We optimized proton-induced X-ray emission (PIXE) for tissue analysis in a toxicity-disposition study. We used cultured rabbit renal slices as the biological system to demonstrate the use of PIXE analysis. The renal slices were exposed to HgCl2, CdCl2, K2Cr2O7, or NaAsO2 alone or in a mixture. The PIXE analysis provides information on concentrations of elements above atomic number 11, and it is...