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Displaying 26 - 50 of 2768

Cell Seeding into Calcium Phosphate Cement

March 1, 2004
Author(s)
Carl Simon Jr., William F. Guthrie, Francis W. Wang
… We have sought to improve calcium phosphate cement by developing a method for seeding bone cells into the cement. Calcium phosphate cement (CPC) is a dry white powder of calcium phosphate salts that when mixed with water will react to form … alginate, bone graft, calcium phosphate cement …

Thermochemistry of the Reaction {Phosphoenolpyruvate(aq) + D-Erythrose 4-Phosphate(aq) + H 2 O(1) = 2-Dehydro-3-Deoxy-D-Arabino-Heptonate 7-Phosphate(aq) + Phosphate(aq)}

December 1, 2001
Author(s)
Yadu D. Tewari, N Kishore, R H. Bauerle, W R. LaCourse, Robert N. Goldberg
… reaction {phosphoenolpyruvate(aq) + D-erythrose 4-phosphate(aq) + H 2 O(l) = 2-dehydro-3-deoxy-D-arabino-heptonate 7-phosphate(aq) + phosphate(aq)}, the first step in the metabolic pathway … 7-, apparent equilibrium constant, D-erythrose 4-phosphate, DAHP synthase, enthalpy, entropy, Gibbs free …

Yb/Er-Codoped and Yb-Doped Waveguide Lasers in Phosphate Glass

March 1, 2000
Author(s)
D. L. Veasey, David S. Funk, P. M. Peters, Norman Sanford, Gregory E. Obarski, N. H. Fontaine, M. Young, A P. Peskin, W. Liu, S. N. Houde-Walter, Joseph S. Hayden
… the development of waveguide lasers using rare-earth-doped phosphate glasses. An improvement has been achieved over … of ion exchange in a commercially available Yb/Er-codoped phosphate glass composition. We have demonstrated slope … distributed-Bragg-reflector, Erbium, phosphate glass, single-frequency, tunable laser, waveguide …

Properties of Calcium Phosphate Carbonate Cements

October 16, 2008
Author(s)
Milenko Markovic, Shozo Takagi, Laurence C. Chow
… physicochemical and mechanical properties of two calcium phosphate carbonate cements (CPCC-1 and CPCC-2) formed in solution reaction of (1) [alpha]-tricalcium phosphate ([alpha]-TCP),[alpha]-Ca 3 (PO 4) d2^, with calcium carbonate, CaCO 3 , and (2) dicalcium phosphate unhydrous (DCPA), CaHPO 4 , with CaCO 3 , were …

Formation of Macropores in Calcium Phosphate Cement Implants

February 1, 2001
Author(s)
Shozo Takagi, Laurence C. Chow
… A calcium phosphate cement (CPC) was shown to harden at ambient … of CPC powder (an equimolar mixture of tetracalcium phosphate, Ca 4 (PO 4 ) 2 O, and dicalcium phosphate anhydrous, CaHPO 4 ) and one of the above additive … anhydrous, biomaterials, calcium phosphate cement, dicalcium phosphate anhydrous, …

Negative Ion-Neutral Reactions in Townsend Discharges

July 1, 1999
Author(s)
James K. Olthoff, MVVS. Rao
… Relative intensities and translational ion-flux energy distributions are presented for negative ions … 2 kTd). These results are discussed in light of relevant ion-molecule reactions where available. … CF 4 , ion molecule reactions, negative ions, O 2 , SF 6 , Townsend …

A Dual Constant-Composition Titration System as In Vitro Resorption Model for Comparing Dissolution Rates of Calcium Phosphate Biomaterials

May 1, 2003
Author(s)
Laurence C. Chow, Milenko Markovic, Shozo Takagi
… postulated that the in vivo resorption rates of calcium-phosphate bone-graft materials are closely related to their … in vitro model to produce dissolution-rate data of calcium phosphate materials as a starting point for predicting in … model to compare dissolution rates of different calcium- phosphate materials. NIST standard reference hydroxyapatite …

Properties of Elastomeric Calcium Phosphate Cement-Chitosan Composites

December 1, 2003
Author(s)
Shozo Takagi, Laurence C. Chow, S Hirayama, F Eichmiller
… Self-hardening calcium phosphate cements (CPC) have been shown to be efficacious in … The CPC powder was an equimolar mixture of tetracalcium phosphate and dicalcium phosphate anhydrous. Cement specimens were prepared by mixing … calcium phosphate cement, chitosan, chitosan derivatives, dicalcium …

Histopathological Reactions of Calcium Phosphate Cements in Periodontal Bone Defect

June 14, 1995
Author(s)
K Fujikawa, A Sugawara, S K. Kusama, S Murai, M Nishiyama, I Moro, Shozo Takagi, Laurence Chow
… Previous studies have demonstrated that a calcium phosphate cement (CPC), consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA), and a new calcium phosphate … bone defect, calcium phosphate, cement, histopathology, osteoconductivity, …

Dose Calibration of Ion Implanters for Semiconductor Production

February 1, 1998
Author(s)
F A. Stevie, David S. Simons, J M. McKinley, J McMacken, R Santiesteban, P Flatch, J Becerro
… a relative uncertainty of less of 5%. The does of boron ion implants were measured by secondary ion mass spectrometry at two different laboratories using … Secondary Ion Mass Spectrometry SIMS XI … boron, ion implantation, silicon, SIMS … Dose Calibration of Ion Implanters for Semiconductor Production …

Tests of Theory in Rydberg States of One-electron Ions

July 1, 2014
Author(s)
Joseph N. Tan, Peter J. Mohr
… electrodynamics (QED) for Rydberg states of one-electron ions can test theory and allow new determinations of … of Standards and Technology (NIST), highly-charged ions (including bare nuclei)created in an Electron Beam Ion … trap. An ongoing experiment aims to produce one-electron ions isolated in an ion trap designed for laser spectroscopy. …

Effect of Powder Grinding on Hydroxyapatite Formation in a Polymeric Calcium Phosphate Cement Prepared from Tetracalcium Phosphate and Poly[Methyl Vinyl Ether-Maleic Acid]

November 1, 1998
Author(s)
Y Matsuya, S Matsuya, Joseph M. Antonucci, S. Takagi, Laurence C. Chow, A Akamine
… vinyl ether-maleic acid) (PMVE-Ma) and tetracalcium phosphate (TTCP) resulted in hydroxyapatite (OHAp) formation. … the mechanical strength of this type of polymeric calcium phosphate cement was evaluated.Cements were prepared by … solution of PMVE-Ma (mass fraction = 25%) and tetracalcium phosphate powders ground for various periods of time. The …

Infrared Spectra of Small Molecular Ions Trapped in Solid Neon

October 3, 2010
Author(s)
Marilyn E. Jacox
… Experiments in this laboratory trap molecular ions in dilute solid solution in neon at 4.2 K in sufficient … charge neutrality of the deposit. Recent observations of ions produced from C2H4 and BF3 will be discussed. Because of … Spectroscopy of Molecular Ions in the Laboratory and in Space …

Highly Charged Ion Studies at the NIST EBIT

January 1, 2001
Author(s)
L P. Ratliff, J R. Roberts
… Highly Charged Ion Studies at the NIST EBIT … atoms, EBIT, electron beam ion trap, highly charged ions, ions … Highly Charged Ion Studies at the NIST EBIT …

Setting Kinetics of Calcium Phosphate Cement by Dielectric Spectroscopy

October 16, 2008
Author(s)
H J. Mueller, R W. Hirthe
… Calcium phosphate cements (CPC) are useful because of their excellent … reaction involving equimolar quantities of tetracalcium phosphate (TTCP, Ca4(PO4)2O) and dicaalcium phosphate anhydrous (DCPA, CaHPO4) with water proceeds by … calcium phosphate cements, complex plane impedance plots, dicalcium …

Trapping Highly Charged Ions: Fundamentals and Applications

April 1, 2000
Author(s)
John D. Gillaspy
… Fundamentals and applications for trapping highly charged ions. … Trapping Highly Charged Ions: Fundamentals and Applications … Trapping Highly Charged Ions: Fundamentals and Applications …

Relativistic Atomic Structure Theory for Highly-Charged Ions

February 19, 2017
Author(s)
Yong Sik Kim
… summarized with emphasis on applications to highly-charged ions. … Trapping Highly-Charged Ions: Fundamentals and Applications … atomic structure theory, highly-charged ions, relativity … Relativistic Atomic Structure Theory for Highly-Charged Ions …

Combinatorial Screening of Osteoblast Response to 3D Calcium Phosphate/Poly(e-caprolactone) Scaffolds Using Gradients and Arrays

December 31, 2010
Author(s)
Carl G. Simon Jr., Kaushik Chatterjee, Laurence C. Chow, Limin Sun, Marian F. Young
… and used to screen the effect of a new amorphous calcium phosphate nanoparticle preparation (CaP) on osteoblast … The CaP-containing scaffolds released calcium and phosphate ions which are known to activate osteoblast … engineering, biomaterials, cell proliferation, calcium phosphate …
Displaying 26 - 50 of 2768
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