- barium flint
- баритовый флинт
English-Russian dictionary of chemistre. 2014.
English-Russian dictionary of chemistre. 2014.
БАРИНТ — (Barium Flint), сорт оптического стекла. По силе преломления и величине цветного рассеивания представляет усовершенствование флинтгласа, достигаемое прибавлением бария в стеклянную массу. БАРИТОН, см. Голое. БАРКРОФТА АППАРАТ (Barcroft),для… … Большая медицинская энциклопедия
industrial glass — Introduction solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… … Universalium
List of chemical element name etymologies — This is the list of etymologies for all chemical element names: Name Symbol Language of origin Word of origin Meaning Symbol origin Description Actinium Ac Greek ἀκτίς (aktis) beam Greek aktinos ἀκτίς, ἀκτῖνος (aktis; aktinos), meaning beam (ray) … Wikipedia
rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium
Crown glass (optics) — This article is about crown glass as used in optics. For the window glass, see Crown glass (window). Crown glass is type of optical glass used in lenses and other optical components. It has relatively low refractive index (≈1.52) and low… … Wikipedia
Diverticulosis — Not to be confused with Diverticulitis. Diverticulosis Classification and external resources Diverticulosis as seen endoscopically ICD 10 K … Wikipedia
optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… … Universalium
Mischmetal — Carl Auer von Welsbach Mischmetal (from German: Mischmetall mixed metal ) is an alloy of rare earth elements in various naturally occurring proportions. It is also called cerium mischmetal, rare earth mischmetal or misch metal. A typical… … Wikipedia
technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… … Universalium
Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… … Wikipedia
Thermite — is a pyrotechnic composition of aluminium powder and a metal oxide which produces an aluminothermic reaction known as a thermite reaction. It is not explosive, but can create short bursts of extremely high temperatures focused on a very small… … Wikipedia