The solvent extraction of silver/I/ is carried out in acetic acid-sodium acetate buffer solution at pH 5.0 by 2,4-dihydroxyacetophenone thiosemicarbazone /DATS/. Ethyl acetate has been used as a solvent and is found that single extraction is sufficient to remove silver/I/ completely from the aqueous phase. Silver/I/ forms 11 complex /metalreagent/ with DATS. The effect of diverse ions on the extraction of silver/I/ has been investigated.
The solvent extraction of silver/I/ has been carried out in 0.5M nitric acid in presence of cyanide by 2,4-dihydroxyacetophenone thiosemicarbazone /DATS/. Ethyl acetate has been used as a solvent and quantitative recovery is made possible with 12.5-fold excess of the reagent in a single extraction. In this medium silver/I/ forms a 22 complex /metal:ligand/ with DATS. The effect of diverse ions on the extraction of silver/I/ has been investigated.
Authors:R. Reddy, P. Reddy, G. Reddy, and B. Rangamannar
A rapid radiochemical method for the determination of thallium(III) has been developed based on the substoichiometric extraction of its 13 complex with sodium isopropyl xanthate into chloroform from pH 9 ammonia buffer. The effect of foreign ions on the extraction was also studied. 10 g amounts of thallium were determined with an average error of 1.9%. The method has been successfully applied for the determination of thallium content present in sphalarite ores collected from Jawar Mines, Rajasthan (India).
Authors:A. Pradeep, G. Nagaraju, P. Sarita, A. Rao, B. Reddy, G. Rao, and S. Reddy
A number of essential trace elements play a major role in various metabolic pathways and in many diseases like autoimmune,
neurological and psychiatric. This study is undertaken with an aim to evaluate the levels of different trace elements in the
scalp hair samples of patients suffering from alcohol induced psychosis by particle induced X-ray emission technique (PIXE).
It is observed that Fe (p < 0.0005), Cu (p < 0.001) are significantly higher in the hair samples of alcohol induced psychosis patients compared to those in normals
while concentrations of Mn (p < 0.005) and Zn (p < 0.0001) are lower. The concentrations of Co and Ni in the hair samples are found to be in consonance with the concentrations
in the normals.
Authors:V. Reddy, J. Satyanarayana, G. Murty, and A. Dash
A new inorganic exchanger zirconiumphosphate-ammonium phosphotungstate (Zr–P-APW) has been synthesized in granular form suitable for column work. TheKd values for different metal ions were determined and the affinity order was found to be CsRb>Zr>Ce> rare earths. Sodium exchange capacity, pH-titration curve, breakthrough capacities for cesium (both in pure HNO3 and in different types of simulated nuclear wastes) and elution of cesium from the Zr–P-APW column have been studied. A selective method for the removal of cesium from other radioactive fission products has been developed. The exchanger was found to be stable to a -radiation dose of 108 rads in presence and absence of 2M nitric acid.
Authors:N. Sreedhar, V. Sivamoorthy, G. Ramachanra Reddy, and B. Rangammanar
Determination of copper/II/ by radiochemical displacement of labelled cobalt from cobalt-o-hydroxybenzaldehyde isonicotinoyl hydrazone /Co-BIH/ complex has been studied. Borate buffer of pH 5 was found to be a suitable medium for quantitative displacement. 10–70 g of copper could be determined. The effect of various foreign metal ions on the determination has also been studied.
Authors:G. Reddy, D. Pant, B. Rao, and M. Das Sankar
A scheme of analysis for the determination of Na, Mn, U, Th, Hf, Sc, La, Ce, Eu, Tb, Co, Rb and Cs in geological samples using
the neutron activation technique has been described. The results obtained in this work on eight geological standard rocks
and a trachyte are presented and compared with literature data.
Authors:P. Sarita, G. Naga Raju, A. Pradeep, Tapash Rautray, B. Seetharami Reddy, S. Bhuloka Reddy, and V. Vijayan
Trace elemental imbalance in human beings is postulated to exert action, directly or indirectly, on the carcinogenic process.
The objective of this study was to evaluate the levels of trace elements in blood sera of breast cancer patients and analyze
their alteration with respect to healthy controls. This work was also intended to establish the role played by the trace elements
in carcinogenic process. Particle induced X-ray emission (PIXE) technique was used for trace elemental analysis of blood sera
of breast cancer patients and healthy controls. The PIXE measurements were carried out using a 2.5 MeV collimated proton beam
from the 3 MV Tandem Pelletron accelerator at Institute of Physics, Bhubaneswar, India. On comparing the trace elemental content
in the sera of breast cancer patients with those of control subjects, significant variations were observed in the levels of
most of the trace elements. The serum levels of almost all the elements except Fe and Cu were observed to be depressed in
cancer patients with respect to normal subjects. However, this variation was significant only for Ti (P < 0.00005), Cr (P < 0.005), Mn (P < 0.0005), Ni (P < 0.01), Zn (P < 0.000001), and Se (P < 0.05). On the other hand, significant elevations were observed in serum Fe (P < 0.05) and Cu (P < 0.005) levels in cancer patients. The findings presented in this paper give guidelines for future study into the possible
roles and interactions of essential trace elements in the breast carcinogenic process.