000			02043nab a2200301 4500
001			MUSEF-HEM-PPE-091275
003			BO-LP-MUSEF
005			20230615115758.0
008			230614b1983 us ||||| |||| 00| 0 eng d
040			_aBO-LpMNE
041			_aeng
092			_sE _aAMER-ANT/vol.48(2)/ Apr.1983
100	1		_aWhile, E.M.
245			_aChemical weatherning of bone in archaeological soils. _cE.M. While
260			_aEstados Unidos-US : _bSociety for American Archaeology, _c1983.
300			_a316-322 páginas: _bilustraciones blanco y negro
310			_aTrimestral
362			_avol.48; n.1 (Jan.1983)
490			_3American Antiquity. Journal of the Society for American Archaeology ; _ano.1
520			_aWeathering of hydroxyapatite in bone probably is initiated by organic and carbonic acids formed by the microbial decomposition of collagen. This weathering independent of soil properties, is caused by protons replacing ca from hydroxyapatite. As collagen is depleted, proton production decreases and weathering may either continue if protons are available from the soil or be arrested if Ca from the soil displaces the protons previously added to the hydroxyapatite. The theoretical Ca P weight ratio of unweathered bones is 2.15. Weathered bones that have been stabilized by Ca may have this ratio or a higher one if extra ca has been addded. A group of weathered bones from one site with a slightly acid soli had an average ratio of 1.67 which probabably promotes further weathering, while bone at the same site with an average ratio of 4.09 was less weathered and apparently stabilized.
653			_aARQUEOLOGIA
653			_aOSTEOLOGIA
773	0		_0302724 _976746 _aSociety for American Archaeology _dEstados Unidos-US : Society for American Archaeology, 1983. _oHEMREV012694 _tAmerican Antiquity. Journal of the Society for American Archaeology; _w(BO-LP-MUSEF)MUSEF-HEM-PPE-091270
850			_aBO-LpMNE
866			_a1
942			_2ddc _cPPE _dCON _j011
999			_c302734