Browsing by Author "KUMAR, NS"

Now showing 1 - 3 of 3
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    INVIVO BIOCOMPATIBILITY OF AN ALIPHATIC CROSS-LINKED POLYURETHANE IN RABBIT
    (JOURNAL OF BIOMEDICAL MATERIALS RESEARCH, 1991)
    A cage implantation technique has been adopted in a rabbit animal model to investigate the biocompatibility of an aliphatic crosslinked polyurethane based on hexamethylene diisocyanate (HDI). In this study, four cages are represented; the cage containing the candidate polyurethane material, biomedical grade polyurethane (Tecoflex), the commercial grade polyvinylchloride (PVC), and an empty cage which were implanted subcutaneously in rabbits. Exudates were aspirated from these cages at 4, 7, 14, and 21 days postimplantation. Exudates were analyzed for variations in proteins, cell counts, and extracellular enzymes. Results with the four types of cage implants showed that the candidate polyurethane caused an inflammatory response comparable to that caused by medical-grade Tecoflex and the empty cage control.
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    OXIDATIVE-DEGRADATION OF POLY(TETRAMETHYLENE GLYCOL)
    (ACTA POLYMERICA, 1991) KUMAR, NS
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    STUDIES ON THE EFFECT OF EXTRACTION OF ISOPHORONE DIISOCYANATE-BASED SEGMENTED POLYURETHANES
    (PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES, 1989) KUMAR, NS; JAYABALAN, M