gypsum

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gypsum

 [jip´sum]
native calcium sulfate, which when calcined becomes plaster of paris; used in making plaster casts for fractures and for taking dental impressions.

gyp·sum

(jip'sŭm),
The natural hydrated form of calcium sulfate; a component of the stones, plasters, and investments used in dentistry.
[L. fr. G. gypsos]

gypsum

/gyp·sum/ (jip´sum) native calcium sulfate dihydrate; when calcined, it becomes plaster of Paris.

gypsum

[jip′səm]
a mineral composed mainly of crushed calcium sulfate hemihydrate. It is the main ingredient in making plaster of paris surgical casts, dental casts, and impressions for dentures. Gypsum dust has an irritant action on the mucous membranes of the respiratory tract and the conjunctiva.

gyp·sum

(jip'sŭm)
The natural hydrated form of calcium sulfate used in dentistry.
[L. fr. G. gypsos]

gyp·sum

(jip'sŭm)
Natural hydrated form of calcium sulfate; component of stones, plasters, and investments used in dentistry.
[L. fr. G. gypsos]

gypsum (jip´sum),

n the dihydrate of calcium sulfate (CaSO4-2H2O). α- Hemihydrate and β-hemihydrate are derived from gypsum. See also plaster of paris.

gypsum

native calcium sulfate, which, when calcined, becomes plaster of Paris; used in making plaster casts for fractures.
References in periodicals archive ?
Owliaie HR, Abtahi A, Heck RJ (2006) Pedogenesis and clay mineralogical investigation of soils formed on gypsiferous and calcareous materials, on a transect, southwestern Iran.
2002); Dodson and Lu (2000) 4-3 ka Churchill (1968) Age Palaco-climate/palaeo-salinity indicators Early Pliocene Lake Tay pollen: Notholagus: humid rainforest conditions Early Pliocene Lakes Lefroy: sparse pollen data: gypsiferous deposits: saline lakewaters/ groundwater 2.
Large areas worldwide contain considerable gypsum and are classified as gypsiferous soils, being the dominant soil formation in arid and semi-arid regions.
The objective of this study was therefore to derive PTFs to predict the soil water retention curve, and the van Genuchten and the van Genuchten-Mualem parameters of some Gypsiferous soils.
A total of 185 gypsiferous soil samples (Typic Haplopypsids and Typic Cacigypsids) were collected from the central part of Iran (52[degrees] 00'E, 32[degrees] 15'N).
Set 1 (n = 155) was used to derive the PTFs and set 2 containing 30 gypsiferous soils was used as a validation set as well as to compare the performance of the derived PTFs with the Rosetta program.
We evaluated the liming action of a New Zealand FBA and examined whether usual application rates of liming materials, including gypsiferous materials (FBA and FGDG), have any significant short-term effect on the amelioration of subsurface soil acidity in 2 New Zealand soils with different mineralogical properties.
Effect of gypsiferous material on magnesium and potassium leaching
The results of this study showed that the leaching loss of Mg and K from the topsoil was an important side-effect of the application of gypsiferous by-products.
L) root elongation in acid soils amended by gypsiferous coal combustion by-products was investigated in a glasshouse study.
The topsoil incorporated lime and gypsiferous by-products did not significantly (P [is greater than] 0.
Potential of using gypsiferous materials as a subsurface soil acidity ameliorant