Assignment Example | Topics and Well Written Essays - 1000 words - 19

Assignment Example Iron catalyses L-DOPA to generate a genuine free radical which forms covalent bonds. These compounds then make good means to bond antifouling polymers. 6. If you want to break the amide (peptide) bonds that marine life use to attach themselves to ship, one should put a minimum of hydrophobic coating on to minimize the adhesive strength of the bonds. This process is called amide hydrolysis. 8. Fluid Flow in most non-biological applications falls into non-biological applications fall into either the laminar flow region for gas phase flows or the turbulent region for liquid phase flows. For biological flows, one is often in the molecula flow regime. 11. 1 (a) Artificial Kidney: Polyhydroxyethylmethacrylate (PHEMA) which is a cross-linked hydrogel. It is not absorbed by the body, capable of withstanding heat sterilization without damage, has resistance to degradation and it contains water content similar to living tissue. (b) Blood Vessels: Nitinol, a shape memory alloys is used as an artificial blood vessel like coronary artery. The memory alloy has the capability of being deformed and going back to its original shape when pressure is released. The materials should be non-corrosive, have resistance to blood platelet, be durable and non-toxic. (c) Contact Lenses: Polyhydroxyethylmethacrylate (PHEMA) is also used in the production of contact lenses. It is selected since it can be organized into any shape or form; it can withstand degradation and can’t be absorbed by the body. (d) Artificial Heart: Polyethylene terephthalate (Knitted Dacron) and Polytetrafluoroethylene (PTFE) as vascular graft are in common use for creation of artificial heart components. Materials should exhibit resistance to platelet and blood clotting, it should have biomechanical strength and durability, non-toxicity and biocompatibility. (e) Hip & Knee replacement: Materials used for hip & knee replacement are metallic biomaterials divided into 3 groups