Broadband and anisotropic light emission from rare-earth doped tellurite thin films is demonstrated using Er3+-TeO2 photonic crystals (PhCs). By adjusting the PhC parameters, photoluminescent light can be efficiently coupled into vertical surface emission or lateral waveguide propagation modes. Because of the flexibility of light projection direction, Er3+-TeO2 is a potential broadband light so...

A new selective and differential agar medium, polymyxin-mannose-tellurite (PMT) agar was devised to differentiate easily colonies of Vibrio cholerae O1 from those of V. cholerae non-O1. The differentiation between colonies of the two vibrios is based on mannose-fermentation. Colonies of V. cholerae O1 on the agar are agglutinated with O1 antiserum of V. cholerae much more easily than those on t...

A selective medium (CGT medium), containing clindamycin, gentamicin, potassium tellurite and amphotericin B in 5% horse-blood agar, allowed unimpaired growth of almost all strains of Pasteurella multocida, and P pneumotropica, while inhibiting other bacteria that might be encountered in upper respiratory tract secretions. With its use, P multocida was readily detected in oral swabs from four of...

Mid-infrared region (2–20 ??m) is an important of electromagnetic spectrum. Most the molecules including CH4, CO, NO, NO2, C6H6, TNT, NH3, SF6, HNO3, greenhouse gas radiation etc. have their fundamental vibrations in this domain. Thus, mid-infrared known as ‘molecular fingerprint region’ and desirable to get signature these molecules. Tellurite chalcogenide glasses advantages a wide transparenc...

A total of 66 (98.5%) of 67 enterohemorrhagic Escherichia coli (EHEC) O157:H7 strains had increased potassium tellurite (Te) MICs (32 to 1,024 microg/ml), grew on Te-containing media, and possessed Te resistance (ter) genes, whereas 83 (96.5%) of 86 sorbitol-fermenting (SF) EHEC O157:NM strains had Te MICs of </=4 microg/ml, did not grow on Te-containing media, and lacked ter genes. Optimal det...

Pathogen resistance to antibiotics is a rapidly growing problem, leading to an urgent need for novel antimicrobial agents. Unfortunately, development of new antibiotics faces numerous obstacles, and a method that resensitizes pathogens to approved antibiotics therefore holds key advantages. We present a proof of principle for a system that restores antibiotic efficiency by reversing pathogen re...

M. J. V. Bell,* V. Anjos, L. M. Moreira, R. F. Falci, L. R. P. Kassab, D. S. da Silva, J. L. Doualan, P. Camy, and R. Moncorgé Laboratório de Espectroscopia de Materiais, Departamento de Física, Universidade Federal de Juiz de Fora, Juiz de Fora-MG, Brazil Laboratório de Tecnologia em Materiais Fotônicos e Optoeletrônicos, Faculdade de Tecnologia de São Paulo, CEETEPS/UNESP, Saõ Paulo, Brazil D...

Staphylococci were the most frequent isolates from clinical specimens submitted from a large referral and teaching veterinary hospital. In this study a total of 160 isolates were examined by a wide range of biochemical tests and modifications of basic procedures. An attempt was made to test the validity of these procedures for use in characterization of clinical isolates of coagulase-positive s...

A highly selective, differential medium for the enumeration and isolation of Klebsiella spp. was developed. With pure cultures, 100% recovery of Klebsiella spp. was observed. Recovery of Klebsiella spp. on MacConkey-inositol-potassium tellurite (MCIK) agar was as good as or better than on MacConkey-inositol-carbenicillin agar either with pure cultures or environmental samples. Recovery and perc...

A simplified procedure is described for the accelerated enumeration of foodborne Staphylococcus aureus. This involves the replacement of egg yolk in the Baird-Parker medium with Tween 80 and MgCl2. These compounds, along with pyruvate, allow the recovery of stressed cells of S. aureus on a medium which contains potassium tellurite, LiCl, and glycine as selective agents. Black colonies are ident...