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Biomedical subjects

A Lakhtakia

Publications and source records attributed to A Lakhtakia.

14 recordsLinked to original sources
PubMed2007

Fibroblast cell attachment and growth on nanoengineered sculptured thin films.

Nanoengineered parylene-C sculptured thin films (STFs) are deposited on glass and silicon substrates using a direct one-step growth technique. The deposited STFs support fibroblast cell attachment and proliferation in vitro, which is an early indication of biocompatibility and bioactivity of this emerging class of biomaterials. Surface modification of endoprostheses of the small joints of the hand, which heal with fibrous stabilization, may be greatly enhanced by such nanoengineered biomaterials.

Animals↗
PubMed2001

Third-order implementation and convergence of the strong-property-fluctuation theory in electromagnetic homogenization.

The strong-property-fluctuation theory (SPFT) has been widely applied under the second-order approximation (also known as the bilocal approximation) to estimate the constitutive properties of effectively homogeneous composite mediums. A third-order mass operator approximation is developed here. The convergence of the long-wavelength, bilocally-approximated SPFT is demonstrated for isotropic chiral composite mediums, as well as for chiroferrite composite mediums.

Journal Article↗
PubMed2000

Strong-property-fluctuation theory for homogenization of bianisotropic composites: formulation

The strong-property-fluctuation theory is developed for the homogenization of the linear dielectric, magnetic, and magnetoelectric properties of a two-constituent bianisotropic composite. The notion of a bianisotropic comparison medium (BCM) is introduced to serve as a springboard for the Dyson equation satisfied by the ensemble-averaged electromagnetic field. With the constitutive properties of the BCM serving as the zeroth-order solution of the Dyson equation, the first-order correction, known as the bilocal approximation, is obtained. Wave propagation in the composite can be described in this manner by a nonlocal effective medium containing information about the spatial correlations of the constitutive properties. For scales larger than the correlation length, the nonlocality vanishes and a local effective medium emerges. Analytical results for the local effective constitutive properties are presented after assuming a spherical particulate topology for the constituent mediums. Illustrative numerical results are provided.

Journal Article↗