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Nita Sahai
Associate Professor
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| Nita Sahai |
| Nita Sahai Associate Professor |
| 463 Weeks Hall Madison, WI 53706 |
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Tel: 608/262-4972 E-mail: sahai@geology.wisc.edu |
B.Sc., St. Xavier's College, Bombay University
Ph.D., Johns Hopkins University, Baltimore
BIOMOLECULAR AND CELL INTERACTIONS WITH METAL OXIDE SURFACES
• Stevens M. J., Donato L.J., Lower S. K., and Sahai N. (2009) Oxide-dependent adhesion of the Jurkat cell-line of T-lymphocytes, in press, Langmuir.
• Xu J., Stevens M. J., Oleson T. A., Last J.A. and Sahai N. (2009) Role of oxide surface chemistry and phospholipid phase on adsorption and self-assembly: Isotherms and Atomic Force Microscopy. J. Phys. Chem. C. 113, 2187-2196. Special issue on Physical Chemistry of Environmental Interfaces. INVITED.
• Oleson T. and Sahai N. (2008) Oxide-dependent adsorption and self-assembly of dipalymitoylphosphatidylcholine, a cell-membrane phospholipid: Bulk Adsorption Isotherms. Langmuir 24, 4865-4873.
• Sahai N. (2002a) Biomembrane phospholipid-oxide surface interactions: crystal chemical and thermodynamic basis. J. Colloid. Interface Sci. 252, 309-319.
BIOMINERALIZATION AND BIOMIMETIC MATERIALS SYNTHESIS
• Mkhonto D. and Sahai N. (2009a) Molecular Dynamics study of amino-acid adsorption on calcite: Implications of functional group identity for crystal growth, in review.
• Mkhonto D. and Sahai N. (2009b) Molecular Dynamics simulations of succinate adsorption at calcite {104} steps, in review.
• Delak K. M. and Sahai N. (2006) Investigations into the mechanisms of amine-catalyzed hydrolysis of organosilicates. J. Phys. Chem. B. 110, 17819-17829.
• Delak K. M. and Sahai N. (2005) Amine-catalyzed biomimetic hydrolysis and polymerization of organosilicate. Chem. Materials, 17, 3221-3227.
• Delak K. M., Farrar T. C., and Sahai N. (2005) 29Si NMR sensitivity enhancement methods for the quantitative study of organosilicate hydrolysis and condensation. J. Non-Cryst. Solids 351, 2244-2250.
• Sahai N. (2004) Calculation of 29Si NMR shifts of silicate complexes with carbohydrates, amino-acids and carboxylic acids: Potential role in biological silica utilization. Geochim. Cosmochim. Acta 68 227-238.
• Sahai N. (2003a) Silicon-organic interactions in the environment and in organisms. INVITED, reviewed chapter in Geochemical and Hydrological Reactivity of Heavy Metals in Soils, eds. W. L. Kingery and H. M. Selim, Chapter 6. CRC Press, Boca Raton, FL.
• Sahai N. and Tossell J. A. (2002) 29Si NMR shifts and relative stabilities calculated for aqueous hypervalent silicon-polyalcohol complexes: role in sol-gel and biogenic silica synthesis. Inorg. Chem. 41, 748-756.
• Sahai N. and Tossell J. A. (2001) Formation energies and NMR chemical shifts calculated for putative serine-silicate complexes in silica biomineralization. Geochim. Cosmochim. Acta 65, 2043-2053.
ORTHOPEDIC AND DENTAL BIOCERAMICS
• Zhang N., Molenda J., Murphy W. and Sahai N. (2009) Pseudowollastonite (CaSiO3) surface roughness and dissolution rate control on human mesenchymal stem cell attachment, proliferation, and differentiation into osteoblasts, in review.
• Sahai N. (2007) Medical Mineralogy and Geochemistry: An Interfacial Science. Elements, 3 (6), 383-386. Guest Editor, N. Sahai.
• Sahai N., Schoonen M., and Skinner H. C. W. (2006) The emerging field of medical mineralogy and geochemistry. INVITED, reviewed chapter for Medical Mineralogy and Geochemistry, Eds. Nita Sahai and Martin Schoonen, Reviews in Mineralogy and Geochemistry Series, Vol. 64, Mineralogical Society of America, Washington, D.C., Chapter 1.
• Cerruti M. and Sahai N. (2006) Silicate biomaterials for orthopaedic and dental implants. INVITED, reviewed chapter for Medical Mineralogy and Geochemistry, Eds. Nita Sahai and Martin Schoonen, Reviews in Mineralogy and Geochemistry Series, Vol. 64, Mineralogical Society of America, Washington, D.C., Chapter 9.
• Sahai N. (2005) Modeling apatite nucleation in the human body and in the geochemical environment, Am. J. Sci. INVITED, peer-reviewed, for special issue of Am. J. Sci. 305, 661-672.
• Sahai N. and Anseau M. (2005) Cyclic silicate active site and epitaxial apatite nucleation on pseudowollastonite bioceramic-bone interfaces. Biomaterials 26, 5763-5370.
• Anseau M. R., Leung P., Sahai N., and Swaddle, T. W. (2005) Interactions of silicate ions with zinc(II) and aluminum(III) in alkaline aqueous solution. Inorg. Chem. 44, 8023-8032.
• Sahai N. (2003b) The effects of Mg2+ and H+ on nucleation of authigenic apatite at silica surfaces. Geochim. Cosmochim. Acta 67, 1017-1030, INVITED.
• Sahai N. and Tossell J. A. (2000) Molecular orbital study of apatite nucleation at silica bioceramic surfaces. J. Phys. Chem. B. 104, 4322-4341.
ENVIRONMENTAL GEOCHEMISTRY
• Hochella M. F., Jr., Lower S. K., Maurice P. A., Penn R. L., Sahai N., Sparks D. L., and Twining B. S. (2008) Nanominerals, mineral nanoparticles, and Earth systems. Science 319, 1631-1635.
• Ciardelli M. C., Xu H., and Sahai N. (2008) Role of Fe(II), phosphate, silicate, sulfate and carbonate in arsenic uptake by coprecipitation in synthetic and natural groundwater. Water Res. 42, 615-624.
• Sahai N., Lee Y., Xu H., Ciardelli M. C., and Gaillard J.-F. (2007) Role of Fe(II) and phosphate in arsenic uptake by coprecipitation. Geochim. Cosmochim. Acta 71, 3193-3210.
• Sahai N. and Rosso K. (2006) Linking molecular modeling to surface complexation modeling. INVITED, reviewed chapter for Surface Complexation Modelling, Ed. Johannes Lutzenkirchen, Interface Science and Technology Series, Vol. 11, Elsevier, Amsterdam.
• Thornburg K. and Sahai N. (2004) Arsenic occurrence, mobility, and retardation in sandstone and dolomite formations of the Fox River Valley, Wisconsin. Environ. Sci. Technol. 38, 5087-5094.
• Sahai N. (2002b) Is silica really an anomalous oxide? Aqueous hydrolysis and surface acidity revisited. Environ. Sci. Technol. 36, 445-452.
• Tossell J. A. and Sahai N. (2000) Calculating the acidity of silanols and related oxyacids in aqueous solution. Geochim. Cosmochim. Acta 64, 4097-4113.
• Sahai N. (2000) Estimating adsorption enthalpies and affinity sequences of monovalent electrolyte ions on oxide surfaces in aqueous solution. Geochim. Cosmochim. Acta 64, 3629-3641.
• O' Day P.A., Newville M., Neuhoff P., Sahai N., and Carroll, S. A. (2000) X-Ray absorption spectroscopy of strontium (II) coordination: I. static and thermal disorder in crystalline, hydrated and precipitated solids and in aqueous solution. J. Colloid. Interface Sci. 222, 184-197.
• Sahai N., Carroll S. A., O' Day P. A., and Roberts S. (2000) X-Ray absorption spectroscopy of strontium (II) coordination: II. Sorption and precipitation at kaolinite, amorphous silica and goethite surfaces. J. Colloid. Interface Sci. 222, 198-212.
• Koretsky C. M., Sverjensky D. A., and Sahai N. (1998) Calculating site densities of oxides and silicates from crystal structures. Amer. J. Sci. 298, 349-38.
• Sverjensky D. A. and Sahai N.(1998) Prediction of surface-protonation enthalpies for oxides. Geochim. Cosmochim. Acta 62, 3703-3715.
• Sahai N. and Sverjensky D. A. (1998) GEOSURF: A computer program for modeling adsorption on mineral surfaces in solution. Computers. Geosci. 24, 853-873.
• Sahai N. and Sverjensky D. A. (1997a) Evaluation of internally-consistent parameters for the triple-layer model by the systematic analysis of oxide surface titration data, Geochim. Cosmochim. Acta 61, 2801-2826.
• Sahai N. and Sverjensky D. A. (1997b) Solvation and electrostatic model for specific electrolyte adsorption. Geochim. Cosmochim. Acta 61, 2827-2848.
• Sverjensky D. A. and Sahai N. (1996) Theoretical prediction of single-site surface protonation equilibrium constants for oxides and silicates in water. Geochim. Cosmochim. Acta 60, 3773-3797.
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Copyright 2009 The Board of Regents of the University of Wisconsin System Date last modified: 27-Feb-2009 Content by: sahai@geology.wisc.edu Accessibility Web services |