The mutagenicity of PCBs, Aroclor 1242 and Clophen A60 was studied in a mammalian cell assay using V79 Chinese hamster cells as target cells. The method was used as a direct assay without metabolizing cells and as a cell-mediated assay with 5000 R-irradiated rat fibroblasts as metabolizing cells. A wipe soot sample of a PCB fire was studied in the same assay, and the results showed no mutagenic...

We investigated the antibiotic resistance of various strains of Salmonella isolated from different sources in Oman, namely sewage water, chicken and food handlers. Of 1242 isolates from food handlers, 15 (1.2%) were resistant to one or more antibiotic. Of these, 41% were resistant to ampicillin, 42% to co-trimoxazole and 22% to chloramphenicol. None of the isolates was resistant to ciprofloxaci...

Transfusion dependent thalassaemia is a significant problem in Sri Lanka. In a study published in 2000, it was estimated that there were approximately 2000 transfusion dependent beta thalassaemia and HbE patients in Sri Lanka and the expenditure on them accounted for approximately 5% of the recurrent health budget of the country [1]. This number has by and large remained static over the past de...

We present multi-epoch, high signal-to-noise spectropolarimetry of the Raman-scattered emission lines of five S-type symbiotic binaries: CD−43◦14304, Hen 1242, M1-21, SY Mus, and V455 Sco. The Raman-line polarizations and magnitudes are used to estimate orbital parameters for these systems. Two of the five systems (CD−43◦14304 and SY Mus) have published radial-velocity orbits, which agree with ...

background and objectives: molecular epidemiology tools are widely used in determining epidemiology of tuberculosis. spoligotyping is a molecular epidemiology method that is used for characterization and typing of mycobacterium tuberculosis complex strains. the method is based on polymorphism of the chromosomal dr locus consisting of identical 36-bp drs alternating with 35-41 unique spacers. th...

Tyrosinase catalyzes the initial, rate-limiting step of melanin synthesis; oxidative conversion L-tyrosine to L-dopa followed by L-dopaquinone means oxygen molecule. possesses bicopper active center capable utilizing molecular oxygen. Metabolic rhododendrol (RD) tyrosinase causes leukoderma in a certain population consumers. Along with cytotoxic RD metabolites, reactive species (ROS) produced d...

sequence of complement plays an essential role in anti-Thy-1 24. Siegert CE, Kazatchkine MD, Sjöholm A, Würzner R, Loos M, mediated apoptosis in vivo. J Am Soc Nephrol 1999; 10: Daha MR. Auto antibodies against C1q: View on clinical 1242–1252 relevance and patholgenic role. Clin Exp Immunol 1999; 116: 4–8 23. Timmerman JJ, Woude FJ van der, Gijlswijk-Janssen DJ, 25. Botto M, Dell’Agnola C, Bygr...