| poorly crystalline hydroxyapatite | amorphous hydroxyapatite |
|---|---|
| hydroxyapatite | <chemistry> The calcium phosphate mineral, Ca10(PO4)6(OH)2, found both in rocks of nonorganic origin and as a component of bone and dentine. Used as column packing for chromatography, particularly for separating double stranded DNA from mixtures containing single stranded DNA. (18 Nov 1997) |
| amorphous | <cell biology> Having an irregular or undefined shape or structure. (05 Feb 1998) |
| amorphous fraction of adrenal cortex | Noncrystalline residue of an acetone extract of the adrenal cortex after crystalline steroids, e.g., corticosterone, deoxycorticosterone, etc., have been isolated. (05 Mar 2000) |
| amorphous insulin zinc suspension | Sterile suspension of insulin in buffered water for injection, modified by the addition of zinc chloride such that the solid phase of the suspension is amorphous; it contains 40 or 80 units per ml; the duration of action is equivalent to that of insulin injection. Synonym: amorphous insulin zinc suspension, semilente insulin. (05 Mar 2000) |
| amorphous phosphorus | Red phosphorus, an allotropic form of phosphorus formed by heating ordinary phosphorus, in the absence of oxygen, to 260캜; it occurs as an amorphous dark red mass or powder, nonpoisonous, and much less flammable than ordinary phosphorus; it may be reconverted to the latter by heating to 454.4캜 in nitrogen gas. (05 Mar 2000) |