Secondary Waves Defined. Secondary waves, or S-waves, are seismic waves produced by an earthquake. As one side of a fault slips past the other, the pressure that had been stored is released and travels radially away from the focus of the earthquake.
Non-Absorbable sutures include :- Polypropylene sutures, Nylon (poylamide), Polyester, PVDF, silk and stainless steel sutures. Monofilament and Multifilament Sutures. Sutures can also be divided into two types on the basis of material structure i.e. monofilament sutures and multifilament or braided sutures. Braided sutures provide better knot security whereas monofilament sutures provide better passage through tissues.
Polypropylene is occasionally recycled. PP is strong and can. usually withstand higher temperatures. It is used to make lunch. boxes, margarine containers, yogurt pots, syrup bottles, prescription bottles. Plastic bottle caps are often made from PP. Polystyrene is commonly recycled, but is difficult to do. Items. such as disposable coffee cups, plastic food boxes, plastic cutlery. and packing foam are made from PS. Code 7 is used to designate miscellaneous types of plastic not. defined by the other six codes. Polycarbonate and Polylactide are. included in this category. These types of plastics are difficult to. recycle. Polycarbonate (PC) is used in baby bottles, compact discs, and medical storage containers.