- degrees German Hardness
- Химия: германские градусы жёсткости (воды)
Универсальный англо-русский словарь. Академик.ру. 2011.
degrees German Hardness
Смотреть что такое "degrees German Hardness" в других словарях:
degrees of water hardness — dGH (water hardness expressed in degrees of hardness. 0 4 is very soft, 5 8 soft, up to 30 which is extremely hard water). Note that different countries use different measures: 1 English (Clark) degree is 14.3 p.p.m. calcium carbonate, 1 American … Dictionary of ichthyology
hardness — water with a high mineral content, the name deriving from the fact that it is hard to develop a lather for cleaning. The concentration of calcium and magnesium ions in water is expressed as p.p.m. or mg/l of calcium carbonate equivalents. Soft… … Dictionary of ichthyology
water hardness — the concentration of calcium and magnesium ions in water expressed as p.p.m. or mg/l of calcium carbonate equivalents. Water hardness expressed in degrees of hardness. 0 4 is very soft, 5 8 soft, up to 30 which is extremely hard water. Note that… … Dictionary of ichthyology
Carbonate hardness — is the measure of Calcium and Magnesium and other hard ions associated with carbonate (CO32 ) and bicarbonate (HCO3 ) ions contained in a solution, usually water. It is usually expressed either as parts per million (ppm or mg/L), or in degrees… … Wikipedia
Hard water — is the type of water that has high mineral content (in contrast with soft water ). Hard water minerals primarily consist of calcium (Ca2+), and magnesium (Mg2+) metal cations, and sometimes other dissolved compounds such as bicarbonates and… … Wikipedia
drawing — /draw ing/, n. 1. the act of a person or thing that draws. 2. a graphic representation by lines of an object or idea, as with a pencil; a delineation of form without reference to color. 3. a sketch, plan, or design, esp. one made with pen, pencil … Universalium
Mesopotamia, history of — ▪ historical region, Asia Introduction history of the region in southwestern Asia where the world s earliest civilization developed. The name comes from a Greek word meaning “between rivers,” referring to the land between the Tigris and… … Universalium
Clarinet — This article is about the musical instrument. For ClariNet, see ClariNet. Clarinet B♭ Clarinet (Boehm system) Woodwind instrument Classification Wind Woodwind … Wikipedia
copper processing — Introduction use of smelting or leaching, usually followed by electrolytic refining or recovery, to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of copper and of its… … Universalium
Oboe — Hautbois redirects here. For the strawberry variety, see Hautbois strawberry. For other uses, see OBOE (disambiguation). Oboe A modern oboe with a reed Woodwind instrument Classification … Wikipedia
Жёсткость воды — Жёсткость воды совокупность химических и физических свойств воды, связанных с содержанием в ней растворённых солей щёлочноземельных металлов, главным образом, кальция и магния (так называемых «солей жёсткости»). Содержание 1 Жёсткая и… … Википедия
