By Shalaby W. Shalaby, Yoshito Ikada, Robert Langer, Joel Williams
content material: Polymers in pharmaceutical items / H. Park and Kinam Park --
Tissue engineering utilizing man made biodegradable polymers / C.A. Vacanti, J.P. Vacanti, and R. Langer --
Interfacial biocompatibility / Yoshito Ikada --
Polymeric units for transcutaneous and percutaneous shipping / Joel L. Williams --
Microcellular foams / S.L. Roweton and Shalaby W. Shalaby --
floor biolization by way of grafting polymerizable bioactive chemical compounds / Y. Ito, ok. Suzuki, and Y. Imanishi --
Hydrophilic, lipid-resistant fluorosiloxanes / G. associates, J. Künzler, R. Ozark, and M. Trokanski --
Synthesis of poly(ether urethane amide) segmented elastomers / A. Penhasi, M. Aronhime, and D. Cohn --
interplay of water with polyurethanes containing hydrophilic block copolymer delicate segments / N.S. Schneider, J.L. Illinger, and F.E. Karasz --
Formation and reactivity of floor phosphonylated thermoplastic polymers / K.R. Rogers and Shalaby W. Shalaby --
floor amendment of polymeric biomaterials with poly(ethylene oxide) : a steric repulsion process / Mansoor Amiji and Kinam Park --
Ascorbic acid as an etchant-conditioner for resin bonding to dentin / James E. Code, Gary E. Schumacher, and Joseph M. Antonucci --
Salt partitioning in polyelectrolyte gel-solution structures / Yu-Ling Yin and Robert ok. Prud'homme --
Ring-opening polymerization of a 2-methylene spiro orthocarbonate bearing a pendant methacrylate team / Jeffrey W. Stansbury --
Ring-opening dental resin structures according to cyclic acetals / B.B. Reed, Jeffrey W. Stansbury, and Joseph M. Antonucci --
Synthesis of novel hydrophilic and hydrophobic multifunctional acrylic monomers / Joseph M. Antonucci, Jeffrey W. Stansbury, and G.W. Cheng --
influence of constitution on homes of absorbable oxalate polymers / Russell A. Johnson and Shalaby W. Shalaby --
Fluorescent healing tracking of dental resins / Spurgeon M. Keeny, III, Joseph M. Antonucci, Francis W. Wang, and John A. Tesk --
Activation of leukocytes by means of Arg-Gly-Asp-Ser-carrying microspheres / Keiji Fujimoto, Y. Kasuya, M. Miyamoto, and H. Kawaguchi --
Poly(vinyl alcohol) hydrogels ready less than various annealing stipulations and their interactions with blood parts / Keiji Fujimoto, Masao Minato, and Yoshito Ikada --
section transition's regulate of collagenous tissue progress and resorption together with bone morphogenesis / David Gilbert Kaplan --
pH-sensitive hydrogels according to hydroxyethyl methacrylate and poly(vinyl alcohol)-methacrylate / Y.J. Wang, F.J. Liou, S.W. Tsai, and G.G.C. Niu --
Kinetic version for degradation of starch-plastic blends with controlled-release capability / Liu Zhang, John J. Harvey, and Michael A. Cole --
Cross-linking and biodegradation of local and denatured collagen / ok. Tomihata, ok. Burczak, ok. Shiraki, and Yoshito Ikada --
Poly(methacrylic acid) hydrogels as providers of bacterial exotoxins in an oral vaccine for farm animals / T.L. Bowersock, W.S.W. Shalaby, M. Levy, M.L. Samuels, R. Lallone, M.R. White, D. Ryker, and Kinam Park --
Dye-grafted, poly(ethylene imine)-coated, formed-in-place classification affinity membranes for selective separation of proteins / Y. Li and H.G. Spencer --
education of insulin-releasing chinese language hamster ovary telephone by means of transfection of human insulin gene : its implantation into diabetic mice / H. Iwata, N. Ogawa, T. Takagi, and J. Mizoguchi --
pH- and ionic-strength-dependent permeation via poly(L-lysine-alt-terephthalic acid) microcapsule membranes / Kimiko Makino, Ei-ichi Miyauchi, Yuko Togawa, Hiroyuki Ohshima, and Tamotsu Kondo.
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Additional resources for Polymers of Biological and Biomedical Significance
ATR-FTIR and XPS provide information on the chemical composition and functional groups in the dried surface region, but not on the surface density and molecular length of the polymer chains grafted on the material surface. Encapsulation of biomaterials by collagenous connective tissue is the most common response of the living system to isolate implanted foreign materials from the surrounding living body for its protection. However, such encapsulation is, in many cases, not desirable for the biomaterial as its performance is often greatly affected by the thick fibrous capsule.
It follows that the release rate would be time dependent since the concentration gradient would change as a function of time. To offset this difficulty, Pharriss, et al. (15), used a silicone fluid saturated with the drug thatreleasedat a constant rate for periods in excess of one year. In their device, a constantreleaserate was maintained until the encapsulated solution became unsaturated. Although the main advantage of a multicomponentreservoirsystem is that it achieves zero-orderreleaserates, the sustainedreleaseof drugs at various rates can be achieved by simply varying the amount of drug dissolved in the solvent This technique could offer certain advantages when prolonged drugreleaseis notrequiredsuch as when a local antibiotic is administered.
100 80 Ζ Ο Ι Ο UJ 60 O-OO 40 20 r 0 è2 · „ ·4 r 1 6 1 8 10 12 IMPLANTATION TIME, week Figure 11. Infection rate for polyethylene sponge percutaneously implanted in rabbits. ( Q ) , without collagen immobilization; ( φ ) , with collagen immobilization. Source: Reproduced w i t h p e r m i s s i o n from reference 18. Copyright 1988 American Chemical S o c i e t y . 3. IKADA 47 Interfacial Biocompatibility Table IV. ch003 With immobilized collagen Source: Reproduced w i t h Copyright (75%) 11/24 (46%) 1/12 (8%) 1/24 (4%) 9/12 Without collagen 1993 Material based permission from reference 19.