Diffusive sampling methods have been validated for the determination of naphthalene and phenanthrene in workplace air. The diffusive sampler tested was the Perkin Elmer ATD tube, and the analysis was performed with thermal desorption, gas chromatography, and mass spectrometric detection. The sampling methods were validated in controlled test atmospheres, mainly according to the protocol propose...

A series of Cinnamamide were prepared by condensation of appropriate malonic acid derivatives with several aldehydes in presence of condensing agent and in its absence α, β Unsaturated acids were synthesized. The synthesized compounds were characterized by elemental analysis and I.R spectra. Introduction: Varley1 was the first to have used pyridine in malonic acid-aldehyde condensations. Later ...

Thin films of binary Bi 0 -TeO and Bi 0 -V 0 systems were prepared by the thermal co-evaporation technique in a vacuum at room temperature. The optical absorption edge of these systems are studied in the wavelength of 200-800 nm using a PERKIN-ELMER uv/Vis spectrophotometer. It is found that the value of n=3/2 in the Davis-Mott equation is best fitted for the fundamental absorption edge f...

background antioxidant compounds have been shown to slow down the development of chemically induced tumors. it has been estimated that most of human cancer cases are due to environmental factors and would be preventable if the main risks could be identified. the potential of vitamin e as a cancer preventive agent has been studied and individuals whose intake of vitamin e was above average showe...

heavy metal pollution in aquatic ecosystems has become one of the global issues. mollusks such as clams can be used as bioindicators and biomonitors of heavy metal pollution in these ecosystems. in fact, mussels and oysters have been widely used for this purpose. in this study, the concentrations of cadmium were measured in soft tissues of rock oysters )saccostrea cucullata( collected from two ...

thin films of binary bi 0 -teo and bi 0 -v 0 systems were prepared by the thermal co-evaporation technique in a vacuum at room temperature. the optical absorption edge of these systems are studied in the wavelength of 200-800 nm using a perkin-elmer uv/vis spectrophotometer. it is found that the value of n=3/2 in the davis-mott equation is best fitted for the fundamental absorption edge for the...

Color as a visual element cannot be separated from architectural design. The development of knowledge about color involved artists and scientists. In the past, was always associated with activities creators decorative works using pigments produced by nature. Artists scientists assume that occurs due to influence light dark which is homogeneous. This later refuted Newton's findings heterogeneous...

A multiplex PCR (mPCR) assay was developed for the detection of multiple Salmonella serotypes in different kind of food products. To increase specificity of this molecular method, three sets of oligonucleotide primer were used to detect the most prevalent salmonella species. PhoP primers specific to the PhoP/PhoQ loci of coliform pathogenic bacteria such as Salmonella, Escherichia coli and citr...

(4e) Zumbuehl, A.; Jeannerat, D.; Martin, S.E.; Sohrmann, M.; Stano, P.; Vigassy, T.; Clark, D.D.; Hussey, S.L.; Peter, M.; Peterson, B.R.; Pretsch, E.; Walde, P.; Carreira, E.M. Angew. Chem. Int. Ed. 2004, 43, 5181-5185. (7b) Baginski, M.; Resat, H.; McCammon, J.A. Mol. Pharmacol. 1997, 52, 560-570. (8) (a) McNamara, C.M.; Box, S.; Crawforth, J.M.; Hickman, B.S.; Norwood, T.J.; Rawlings, B.J. ...