Abstract It is often useful to be able deal with locales in terms of presentations their underlying frames, or equivalently, the geometric theories which they classify. Given a presentation for locale, its sublocales can obtained by simply appending additional relations, but case quotient more subtle. We provide simple procedures obtaining open quotients, proper quotients general triquotients f...

Amphibians, which can live in aquatic and terrestrial environments, are a good indicator of pollution these areas. Although frog leg is not consumed frequently some cuisines, including Turkey, it important terms evaluating metal accumulation since preferred as human food many European countries. In this study, the quantities trace elements (Cd, Pb, Cu, Zn, As, Co, Cr, Ni, Mn, V) were measured e...

Abstract Background Excess accumulation of heavy metals in frequently consumed food (e.g., vegetables, fruits) is a serious threat to human health. The concentration four root vegetables and five leafy collected from the Kawran Bazar fresh vegetable market Dhaka, Bangladesh, were analyzed. Average daily intake (ADI), hazard quotient (HQ), index (HI) also estimated assess health risks posed by c...