Transient state (chemical engineering) — In chemical engineering, a system is said to be in transient state when a process variable has been changed and the system has not yet reached steady state. Example: When a chemical reactor is being brought into operation, the concentrations,… … Wikipedia
List of species on Severnaya Zemlya — Species recorded on Severnaya Zemlya:FloraVascular plantsMost common: * Cerastium sp. * Papaver polare * Saxifraga caespitosa * Saxifraga oppositifolia Less common: * Alopecurus alpinus * Cerastium regelii * Deschampsia sp. * Draba sp. *… … Wikipedia
Lucerne transient streak virus — Taxobox color=violet name = Lucerne transient streak virus (LTSV) virus group = IV: (+)sense RNA Viruses familia = genus = Sobemovirus species = Lucerne transient streak virus synonyms = Lucerne transient streak virus (LTSV) is a plant pathogenic … Wikipedia
chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another … Universalium
chemical kinetics — Introduction the branch of physical chemistry (chemistry) that is concerned with understanding the rates of chemical reactions (chemical reaction). It is to be contrasted with thermodynamics, which deals with the direction in which a… … Universalium
Joshua Tree National Park — Infobox protected area | name = Joshua Tree National Park iucn category = Ib caption = locator x = 34 locator y = 110 location = Riverside County San Bernardino County, California, USA nearest city = Twentynine Palms, San Bernardino lat degrees … Wikipedia
Lactone — β propiolactone, formed from β hydroxypropionic acid In chemistry, a lactone is a cyclic ester[1] which can be seen as the condensation product of an alcohol group OH and a carboxylic acid group COOH in the same molecule. It is characterized by a … Wikipedia
Davy Medal — Robert Bunsen and Gustav Kirchhoff, the first recipients of the award. They were awarded the medal for their researches discoveries in spectrum analysis . The Davy Medal is awarded by the Royal Society of London for an out … Wikipedia
Radiolysis — is the dissociation of molecules by radiation. It is the cleavage of one or several chemical bonds resulting from exposure to high energy flux. For example water dissociates under alpha radiation into hydrogen and oxygenFact|date=August 2008. The … Wikipedia
tonga — /tong geuh/, n. a light, two wheeled, horse drawn vehicle used in India. [1870 75; < Hindi tanga] * * * Tonga Introduction Tonga Background: The archipelago of The Friendly Islands was united into a Polynesian kingdom in 1845. It became a… … Universalium
Tonga — /tong geuh/, n. a Polynesian kingdom consisting of three groups of islands in the S Pacific, NE of New Zealand: a former British protectorate. 100,105; ab. 270 sq. mi. (700 sq. km). Cap.: Nukualofa. Also called Tonga Islands, Friendly Islands.… … Universalium