Conclusions: Crystals forming mineral blocks of mostly compact matter are nucleated on organic substrates, with their growth controlled by the diffusion of building units through the virtually stagnant layer of interstitial fluid wetting the deposit surface. Preferentially formed precursors of hydroxyapatite, dicalcium, octacalcium and/or amorphous calcium phosphate, are in later stages of depo...

On April 26, 1996, Public Law 104-134 was Chart 1 .-Payment volume, by type of disbursement, fiscal year 1997 enacted, requiring all Federal payments except tax refunds be issued electronically by January 2, 1999, thus beginning a new era in electronic N Federal tax 10.5% funds transfer (EFT). This legislation, the Debt Collection Improvement Act of 1996-part of the Omnibus Consolidated Resciss...

In the world demand and consumption of raw materials minerals is sharply increasing, which has encouraged countries around to intensify mining different ores such as phosphate. Algeria, while phosphates are one country's most important natural resources; they ranked third in terms proven reserves with 2,200,000 tones, this ore low. The Bled El Hadba deposit promising Djebel Onk’s deposits 841 m...