Publish Your Research Online
Get Recognition - International Audience
Request for an Author Account | Login | Submit Article
|HOME||FAQ||TOP AUTHORS||FORUMS||PUBLISH ARTICLE|
Introductory Note on Silk With Its PropertiesBY: Kirti Rani | Category: Biology | Submitted: 2012-07-25 07:14:38
Article Summary: "Silk is a natural protein fiber which is commonly used in textiles industries from the ancient time. The best type of silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori..."
Silk fibers is formed from the Bombyx mori silkworm with triangular cross section with rounded corners of 5-10 μm wide. The fibroin-heavy chain is composed mostly of beta-sheets with flat surfaces of the fibrils reflect light at many angles to give natural shining appearance to silk. The cross-section from other silkworms may vary in shape and diameter and silkworm fibers are naturally extruded from two silkworm glands as a pair of primary filaments (brin) which are stuck together, with sericin proteins that act like glue to form a bave. Bave diameters for silk can reach up to 65 μm. Silk is one of the strongest natural fibers with good moisture of 11%. Its elasticity is excellent and it is microbial resistant too. However, It can be weakened if exposed to larger exposure of direct sunlight. Silk is a poor conductor of electricity and thus susceptible to static cling. Unwashed silk chiffon may shrink up to 8% due to a relaxation of the fiber macrostructur and occasionally, this shrinkage can be reversed by a gentle steaming with a pressing. Natural and synthetic silk is known to manifest piezoelectric properties in proteins, probably due to its molecular structure.
The construction of silk is called sericulture. The major silk producers are China (54%) and India (14%). Silk consists of two main proteins, sericin and fibroin. Fibroin is structural center of the silk, and serecin surrounds this core as sticky material. Fibroin is made up of the amino acids: Gly-Ser-Gly-Ala-Gly-Ala and forms beta pleated sheets. The high proportion (50%) of glycine is responsible for tight packing which makes the fibers are strong and resistant to breaking. The tensile strength is due to the many interceded hydrogen bonds and when stretched the force is applied to these numerous bonds and they do not break. Silk is resistant to most mineral acids, except for sulfuric acid, which dissolves it. It is yellowed by perspiration. Its low conductivity keeps warm air close to the skin during cold weather as well. It is often used for clothing such as shirts, ties, blouses, formal dresses, high fashion clothes, lingerie, pyjamas, robes, dress suits, sun dresses and Eastern folk costumes. Silk's attractive lustre and drape makes it suitable for many furnishing applications such as for upholstery, wall coverings, window treatments. A special manufacturing process removes the outer irritant sericin coating of the silk, which makes it suitable as non-absorbable surgical sutures.
About Author / Additional Info:
Dr. Kirti Rani Sharma,
Assistant Professor (II),
Amity Institute of Biotechnology,
Amity University Uttar Pradesh, Noida
Sec-125, Gautam Buddha Nagar, Noida-201303 (UP), India.
Office Phone no: +91-120-4392946
Mobile No: +91-9990329492
Email ID: email@example.com, Kirtisharma
Comments on this article: (0 comments so far)
• Agrobacterium Mediated Gene Transfer: An Overview [PDF]
• Genetics of Addiction
• Various Methods for Quantitation of Proteins
• Parallel Potential Prospects of Nanotechnology and Bioinformatics
Latest Articles in "Biology" category:
• Wonderful World of Microorganisms and Their Role in Human Life.
• Molecular Biology Techniques
• Process of Reproduction in Bacteria
• Importance of Microorganisms in the Ecosystem
• Starting From the Basics: DNA Extraction
• Agrobacetium-Mediated Transformation Protocol
• Sucrose Regulating Photosynthesis
• Nitrogen Fixation: Genes Involved and the Infection Process
• Functional Genomics: A Tool in Genetic Engineering
• Plant Tissue Culture and Its Applications
• Harmful Effects of Mold and Their Prevention
• Gel Electrophoresis in Molecular Biology
• Extraction of Phytochemicals
• Applications of Thin Layer Chromatography
• Beneficial and Harmful Bacteria
• Calvin Cycle Regulation and Effect on Photosynthesis
• How a Baby Develops Inside Mother's Womb: From an Embryo to a Child
• Apoptosis (or cell suicide) : Process and Types
• Neurotransmitters and its types
Important Disclaimer: All articles on this website are for general information only and is not a professional or experts advice. We do not own any responsibility for correctness or authenticity of the information presented in this article, or any loss or injury resulting from it. We do not endorse these articles, we are neither affiliated with the authors of these articles nor responsible for their content. Please see our disclaimer section for complete terms.
Copyright © 2010 biotecharticles.com - Do not copy articles from this website.
ARTICLE CATEGORIES :
| Disclaimer/Privacy/TOS | Submission Guidelines | Contact Us