Improvement of leguminous vegetables production in calcareous soil by addition of some acidifying materials

Michail, N. N.; Faris, F. S.; Hassan, Mohamed H.; Kerlous, R. G.

doi:10.1007/978-94-009-1586-2_26

Cited by 1 publication

(1 citation statement)

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“…Thermal pyrolysis in the presence of both C 2 H 2 and PH 3 yields various gaseous species that are essential for the SANG growth: aromatic hydrocarbon molecules, P 4 , phosphorine (C 5 H 5 P), and phosphinoline (C 9 H 7 P) (Figure S2) . In particular, phosphorine, a predominant derivative in this work, is known as a noncollagen macromolecule with high calcium-binding capacity and strong phosphate-solubilizing fertility. − The reaction of phosphorine on the surface of calcium-rich glass fibers may result in a phosphorine–Ca 2+ complex, producing a molecular species that favorably bound to the phosphate generated through reaction of the derived P 4 . , These phosphate-binding molecular species may promote formation of amorphous calcium phosphate compounds that are eventually transformed into the apatite crystal. ,, Growth over the initial 30 s showed the formation of both amorphous and crystalline calcium phosphate nanoparticles (Figures a and S3a). After 120 s, most nanoparticles changed into crystals and some slowly started to elongate (Figures b and S3b).…”

Section: Resultsmentioning

confidence: 89%

Single-Crystal Apatite Nanowires Sheathed in Graphitic Shells: Synthesis, Characterization, and Application

Jeong

Cha²,

Park

et al. 2013

ACS Nano

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Vertically aligned one-dimensional hybrid structures, which are composed of apatite and graphitic structures, can be beneficial for orthopedic applications. However, they are difficult to generate using the current method. Here, we report the first synthesis of a single-crystal apatite nanowire encapsulated in graphitic shells by a one-step chemical vapor deposition. Incipient nucleation of apatite and its subsequent transformation to an oriented crystal are directed by derived gaseous phosphorine. Longitudinal growth of the oriented apatite crystal is achieved by a vapor-solid growth mechanism, whereas lateral growth is suppressed by the graphitic layers formed through arrangement of the derived aromatic hydrocarbon molecules. We show that this unusual combination of the apatite crystal and the graphitic shells can lead to an excellent osteogenic differentiation and bony fusion through a programmed smart behavior. For instance, the graphitic shells are degraded after the initial cell growth promoted by the graphitic nanostructures, and the cells continue proliferation on the bare apatite nanowires. Furthermore, a bending experiment indicates that such core-shell nanowires exhibited a superior bending stiffness compared to single-crystal apatite nanowires without graphitic shells. The results suggest a new strategy and direction for bone grafting materials with a highly controllable morphology and material conditions that can best stimulate bone cell differentiation and growth.

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