Mbssbauer and near-infrared spectral measurements have been made on several tourmaline minerals representing both the elbaite-schorl and dravite-schorl series. The specimens were characterized by cell dimension measurements, and by partial chemical analyses by electron microprobe. M'ssbauer data for the iron-bearing specimens further substantiated the presence of ferrous and ferric cations in b...

The light absorption coefficient of water is dependent on temperature and concentration of ions, i.e. the salinity in seawater. Accurate knowledge of the water absorption coefficient, a, and/or its temperature and salinity correction coefficients, Ψ(T) and Ψ(S), respectively, is essential for a wide range of optical applications. Values are available from published data only at specific narrow ...

This article reveals the leading role of standards in Industrial Ecology. It describes the tendency for the modern stage of world development to introduce widely accepted international standards. Along with this, each country has it own system of standards and respective specifics. A number of significant standards are available for practical operations of industries and institutions, e.g. the ...

Enamel anomalies – amelogenesis imperfecta, 1: 14000, several types with different heredity. Most frequent type is AD with hypomineralisation. Enamel matrix is normaly created, but the mineralisation is insufficient. The enamel is soft,peels off. Teeth are yellowbrown. Open bite is common. Reduction of pulp chamber occurs relatively early, so the reconstruction with crowns could be provided bef...

Kondisi pencemaran lingkungan yang meningkat setiap tahunnya menuntut perhatian dari semua pihak. Selain itu pertumbuhan industri semakin marak saat ini, membutuhkan komitmen dan tanggung jawab para pelaku untuk ikut serta menjaga agar tetap lestari. Penerapan Sistem Manajemen Lingkungan (SML) ISO 14000, menjamin konsumen masyarakat akan tersebut. Persaingan pasar kompetitif, menginisiasi PT. S...