Tissues and minerals

Hydroxylapatite Caio(P04)6(OH)2 In an impure form (main impurities COs, Mg and HP04 ) as the mineral in bones and tee. In most pathological calcifications. Pure HAP as a S5mthetic biomaterial 

Amorphous calcium phosphate, ACP One time thought to be a major component of bone mineral (see text). Occurs in plasma-sprayed HAP coatings on prosthetic implants  

Octacalcium phosphate CasH2(P04)6-5H20 Dental calculus and possibly a transient phase in precipitation of biological HAPs  

Bmshite CaHP04-2H20 Dental and urinary calculi 

Magnesian whitlockite Approximately CaisMg2H2(P04)i4 Dental calculus, urinary and salivary calculi, carious lesions in teeth and other pathological calcifications 

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The residual plant tissues and minerals, termed here as dirt, in guayule rubber were characterised and classified into two arbitrary groups, i.e. fine dirt and coarse dirt. The effect of these types of dirt on tensile strength and fatigue to failure properties of NR was investigated. Results are discussed and evaluated. 12 refs. 

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