Abstract
Silk fibers in the three layers of Attacus atlas (A. at- las) cocoons have morphological structure and ten- sile properties similar to that of Bombyx mori silk. Attempts are being made to produce silk for com- mercial applications from cocoons of relatively un- known wild insects due to the unique properties of the fibers and as a source of income and employ- ment. In this research, A. atlas cocoons were used to study the chemical composition, morphology, phys- ical structure and tensile properties of the silk fibers in the cocoons and ability of the fibers to support the attachment and proliferation of mouse fibro- blast cells. It was found that A. atlas cocoons consists of outer, intermediate and inner layer with average breaking tenacity of 4.1, 4.3, and 3.6 g/den, respec- tively similar to that of B. mori silk (4.3–5.2 g/den). The heavier cocoons, less restrictive rearing condi- tions and good properties of the fibers compared to B. mori silk makes A. atlas a potential alternative to common silks for commercial scale silk production. A. atlas fibers had about 80 % higher optical densi- ties of cells and extensive growth of F-actin com- pared to B. mori silk fibers.
AbstractSilk fibers in the three layers of Attacus atlas (A. at- las) cocoons have morphological structure and ten- sile properties similar to that of Bombyx mori silk. Attempts are being made to produce silk for com- mercial applications from cocoons of relatively un- known wild insects due to the unique properties of the fibers and as a source of income and employ- ment. In this research, A. atlas cocoons were used to study the chemical composition, morphology, phys- ical structure and tensile properties of the silk fibers in the cocoons and ability of the fibers to support the attachment and proliferation of mouse fibro- blast cells. It was found that A. atlas cocoons consists of outer, intermediate and inner layer with average breaking tenacity of 4.1, 4.3, and 3.6 g/den, respec- tively similar to that of B. mori silk (4.3–5.2 g/den). The heavier cocoons, less restrictive rearing condi- tions and good properties of the fibers compared to B. mori silk makes A. atlas a potential alternative to common silks for commercial scale silk production. A. atlas fibers had about 80 % higher optical densi- ties of cells and extensive growth of F-actin com- pared to B. mori silk fibers.
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