Based on the metachromatic property of Toluidine Blue O, three, convenient agar-diffusion methods have been developed that enable detection of the nuclease of Staphylococcus aureus at concentrations as low as 0.005 mug/ml in agar and broth cultures. The interactions of agar and deoxyribonucleic acid with Toluidine Blue O are discussed.

The mechanisms by which different light spectra regulate plant shoot elongation vary, and phytohormones respond differently to such spectrum-associated regulatory effects. Light supplementation can effectively control seedling growth in Norway spruce. However, knowledge of the effective spectrum for promoting growth and phytohormone metabolism in this species is lacking. In this study, 3-year-o...

Blue cheeses are those whose matrix is veined with a blue, blue-grey, or blue-green colour due to the development of Penicillium roqueforti. There more than 45 varieties blue cheese produced worldwide, some distinct features, although manufacture process similar. In addition P. roqueforti, complex microbial populations interact and succeed throughout manufacturing ripening at cheese’s surface (...

AMA Pisarska A, Greń J, Ostaszewski K. Prevalence and factors associated with novel psychoactive substance use among the residents of special educational centres in Poland. Alcoholism Drug Addiction/Alkoholizm i Narkomania. 2022;35(4):271-292. doi:10.5114/ain.2022.126423. APA Pisarska, A., Greń, J., & Ostaszewski, (2022). Narkomania, 35(4), 271-292. https://doi.org/10.5114/ain.2022.126423 Chica...

A soluble viral antigen with possible diagnostic utility was obtained from blue-tongue virus-infected lamb kidney cells. It is a noninfectious proteinaceous substance without nucleic acid. The antigen is immunologically identical to one component of the viral particle, and in agar-gel diffusion tests it reacted with antiserum against several blue-tongue virus strains.

Electrostatic interactions between an ESIPT molecule 2-(5'-amino-2'-hydroxyphenyl)benzothiazole (AHBT) and a phenylborate derivative give blue-green emission in acetic acid solution, but interestingly, vigorous (or mechanical) shaking of the solution leads to the formation of organic AHBT nanoparticles, which results in fluorescence colour switching from blue-green to yellow-orange.