2. What is Spider Silk?
5. HISTORY
7. REELING PROCESS
9. TYPES OF SPIDER SILK
12. WHO INVENTED SPIDER SILK?
14. Genetically Engineered Spider Silk / Synthetic Spider Silk
16. Transgenic spider dragon silk
18. ARTIFICAL SPIDER SILK (BACTERIA)
22. ARTIFICAL SPIDER SILK (ph solution)
24. Man made SPIDER SILK (goat milk)
28. Properties 0f spider silk
32. END USES OF SPIDER SILK
Check the videos on youtube:
VIDEO 1:
Milking a Spider | Richard Hammond's Invisible Worlds | Earth Lab
VIDEO 2:
Thomas Scheibel - Artificial spider silk
VIDEO 3:
A Simple, New Way to Spin Spider Silk in the Lab
VIDEO 4:
Making Stuff Spider Silk
This power point presentation consist of slides on wool yielding animals and processing of fibres into wool. Students are supposed to read from slides 12 till end .
2. What is Spider Silk?
5. HISTORY
7. REELING PROCESS
9. TYPES OF SPIDER SILK
12. WHO INVENTED SPIDER SILK?
14. Genetically Engineered Spider Silk / Synthetic Spider Silk
16. Transgenic spider dragon silk
18. ARTIFICAL SPIDER SILK (BACTERIA)
22. ARTIFICAL SPIDER SILK (ph solution)
24. Man made SPIDER SILK (goat milk)
28. Properties 0f spider silk
32. END USES OF SPIDER SILK
Check the videos on youtube:
VIDEO 1:
Milking a Spider | Richard Hammond's Invisible Worlds | Earth Lab
VIDEO 2:
Thomas Scheibel - Artificial spider silk
VIDEO 3:
A Simple, New Way to Spin Spider Silk in the Lab
VIDEO 4:
Making Stuff Spider Silk
This power point presentation consist of slides on wool yielding animals and processing of fibres into wool. Students are supposed to read from slides 12 till end .
IELTS Preparation presentation. More information about the presentation (in Arabic) can be found here with a download link below the document as well:
http://goo.gl/n6F5h
The spider silk is a type of natural silk and it has a wide variety of properties and applications.
Here is the basic things about the spider silk i.e. about the history , Types of spider silk, chemistry of spider silk , production, characteristics, different kind of properties ,etc.
Notes on "SERICULTURE" for the school , UG and PG Students.PRANJAL SHARMA
Sericulture, the production of raw silk by means of raising caterpillars (larvae), particularly those of the domesticated silkworm (Bombyx mori). ... Care of the silkworm from the egg stage through completion of the cocoon. Production of mulberry trees that provide leaves upon which the worms feed.
Silk is one of the earliest natural fibres discovered by man. The cocoon silk of domesticated silkworm, Bombyx mori (Lepidoptera: Bombycidae) is prized over millennia for textiles, and most of our understanding about silk production is from this species. However, silk is known to occur in many arthropod classes, and a few molluscs and fishes also.
Among the class Insecta, 16 out of 30 orders produce silk for a variety of purposes, which include reproduction, shelter, protection from predators, etc.
Insect silk possesses extraordinary mechanical properties in terms of strength, extensibility and stiffness. The obvious example of the use for silk is cloth, which also takes up the highest proportion of silk consumption. The versatility and sustainability of silk based materials attract its use in food packaging, medicine, automobile industry, dietary and cosmetic supplements, optics, art, craft, etc.
Though the term ‘silk’ encompasses a wide range of distinct materials, it is remarkable that certain features are common among silk production systems in insects. Today, insect silk has taken on new importance to society beyond fabric. Mechanically enhanced silk is expected to open up possibilities for numerous novel applications.
silk worm is a holo metabolous insect four stages are there in its life cycle. 1. Egg 2. Larva ( 5 instars) 3. Pupa 4. Adult. rearing of silkworms is called sericulture. Moriculture is the science of mulberry cultivation to rear silk worms for silk production. Bombyx mori feed specifically on mulberry leaves, Different types of silk worms. There are five major types of silk of commercial importance, obtained from different species of silkworms which in turn feed on a number of food plants: Except mulberry, other varieties of silks are generally termed as non mulberry silks. India has the unique distinction of producing all these commercial varieties of silk. SILK WORM TYPES ARE:- 1. Mulberry silk worm. 2. Tasar silk worm. 3. Oak Tasar silk worm. 4. Eri silk worm. 5. Muga silk worm. silk gland is modified salivary gland produces silk, The silk of silkworms is secreted by a pair of labial gland, known as silk glands. The silk glands lie ventral to the alimentary canal. In full grown larvae, these occupy most of the body cavity. The silk glands are tubular in shape with different diameters in different regions. Each gland has 3 distinct regions
6. But we can’t breed spiders because they kill each other … So, what is the solution ? So spider silk is very useful GRRR !!! Yum Yum !
7. How to reproduce artificially spider silk? Scientists have studied how spiders make their silk: Silk proteins are long molecules form a viscous solution passes in a very fine canal of spider’s gland molecules become aligned The spider stretches the gel before it dries viscosity drops by a factor of 500 or more…
8.
9. One of the ideas is described in the following video : http://www.youtube.com/watch?v=fRTZMhYWKmY&NR=1
10. One of the ideas is : to produce the spider silk proteins in the milk of goats Transgenic goats produce in their milk spider silk proteins ! The spider silk genes are introduced into goat embryos The embryos are implanted in surrogate mothers At birth, kids are carriers of spider silk genes !!
11. Proteins are separated from the milk and purified They pass under pressure in microscopic holes to force them to align. The thread is stretched to give it its mechanical properties We obtain transgenic thread ! To obtain transgenic thread :