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.
Often called pool rope or ski rope, polypropylene rope is a synthetic thatâs very lightweight so it will not sink in water. Since it doesnât absorb water, it resists rot, mildew, oils, acids, etc. Polypropylene can stretch when under load and can be uncomfortable to handle since it is stiffer than a natural fiber. Polypropylene is sometimes mistaken for parachute cord (also called paracord or 550 cord), however, that is a nylon general purpose utility cord with a smoother texture.