Related Literature Of Spider Silk
Chapter 2
REVIEW OF RELATED LITERATURE AND STUDIES
Related Literature Spider silk (Parasteatoda tepidarium) commonly known as agiw in Filipino,is a material spun by varieties of spiders.Spider silk has a unique combination of mechanical strength and elasticity that makes it one of the toughest materials we know.(Arizona State University,2013).
Furthermore,silk consists of very repetitive blocks of mainly glycine and alanine.These are the simplest and smallest amino acids allowing strands to be packed together.(Powers,2013).In ad- dition,production of silk fibers starts from amino acids building blocks.The method continues with change in concentration of the protein and ionization of the environment.It is then followed by application of an …show more content…
The native protein of silk gland "fibrinogen" is water soluble, while passing through the spinnerets it becomes a tough insoluble product "fibroin" in which the molecule assume an orderly crystalline arrangement in the long axis of the fiber. The silk, which is coated with sericin, a glue like proteins that hold the fibroin core together. The silk fibers have been used for decades as sutures in biomedical application and have potential as scaffolds in tissue …show more content…
Yet, silk is only loosely defined as semi-crystalline fibrous proteins that are extruded external to an organism’s body. However, the mechanical and biochemical diversity of silks is staggering. Spiders are unique in their reliance on silk throughout their lives, their diverse uses of silk, and their production of toolkits of as many as seven or eight different types of silks, each of which has a unique chemical composition and comes from its own discrete gland(s) and associated spigot(s) (Guerette et al. 1996; Blackledge & Hayashi 2006a; Vollrath & Porter 2006; Dicko et al. 2008). All spiders produce silk throughout their lives, and most are capable of spinning multiple types of silk threads. Spider silk threads are extruded from discrete glands through individual spigots located on their abdominal spinnerets. The silk threads are assembled nearly instantaneously from liquid feedstocks, or ‘‘dopes’’, of protein at ambient temperatures and without caustic chemicals (Eisoldt et al. 2011). Spider silks rank among the toughest energy absorbing materials known (Vollrath & Porter 2009), requiring up to 7–10 times more energy to fracture than an equivalent volume of synthetic Kevlar (Agnarsson et al.
REVIEW OF RELATED LITERATURE AND STUDIES
Related Literature Spider silk (Parasteatoda tepidarium) commonly known as agiw in Filipino,is a material spun by varieties of spiders.Spider silk has a unique combination of mechanical strength and elasticity that makes it one of the toughest materials we know.(Arizona State University,2013).
Furthermore,silk consists of very repetitive blocks of mainly glycine and alanine.These are the simplest and smallest amino acids allowing strands to be packed together.(Powers,2013).In ad- dition,production of silk fibers starts from amino acids building blocks.The method continues with change in concentration of the protein and ionization of the environment.It is then followed by application of an …show more content…
The native protein of silk gland "fibrinogen" is water soluble, while passing through the spinnerets it becomes a tough insoluble product "fibroin" in which the molecule assume an orderly crystalline arrangement in the long axis of the fiber. The silk, which is coated with sericin, a glue like proteins that hold the fibroin core together. The silk fibers have been used for decades as sutures in biomedical application and have potential as scaffolds in tissue …show more content…
Yet, silk is only loosely defined as semi-crystalline fibrous proteins that are extruded external to an organism’s body. However, the mechanical and biochemical diversity of silks is staggering. Spiders are unique in their reliance on silk throughout their lives, their diverse uses of silk, and their production of toolkits of as many as seven or eight different types of silks, each of which has a unique chemical composition and comes from its own discrete gland(s) and associated spigot(s) (Guerette et al. 1996; Blackledge & Hayashi 2006a; Vollrath & Porter 2006; Dicko et al. 2008). All spiders produce silk throughout their lives, and most are capable of spinning multiple types of silk threads. Spider silk threads are extruded from discrete glands through individual spigots located on their abdominal spinnerets. The silk threads are assembled nearly instantaneously from liquid feedstocks, or ‘‘dopes’’, of protein at ambient temperatures and without caustic chemicals (Eisoldt et al. 2011). Spider silks rank among the toughest energy absorbing materials known (Vollrath & Porter 2009), requiring up to 7–10 times more energy to fracture than an equivalent volume of synthetic Kevlar (Agnarsson et al.