Silk tube

Purse-web spiders (Atypidae) capture their prey through the walls of a silk tube, thus hiding from the environment. Males stopped wandering around on sites from which female silk tubes had been removed (Coyle and Shear, 1981), suggesting a contact sex pheromone. However, the response could have been evoked by remnants of the silk tube. In the Hexathelidae, male Atrax infensus were attracted by volatiles from females, and this behavior was exploited to trap males, using traps with hidden females (Hickman, 1964). 

Other types of spider webs include tangle webs and sheet webs sptm by different species. Many other insects spin silk fibers for cocoons, shelter, egg sacs, egg stalks, and tunnels. For example, tarantulas use silk to spin tunnel-shaped shelters, and spin fibers from their feet as support lines. Caddisfiy larvae spin underwater tubes and nets, and the aquatic midge spins underwater silk tubes. Honeybee larvae spin silk to inCTease the mechanical strength and thermal stability of the beehive. These silks are subject to inaeasing amounts of research, as reviewed in Reference 11. 

Perl-mutterpapier, n, naereous paper, -rohr, n, -rohre, /. bead tube (tube filled with glass beads), -sago, m. pearl sago, -salz, n. micro-eosmic salt, -samen, m. seed pearl, -schicht, /. nacreous layer, -schnur, /. string of beads or pearls row of droplets, -seide, /. embroidery silk ardassine, -spat, m, pearl spar (pearly dolomite), -stein, m, perlite adu-laria. -sucht, /. bovine tubereulosis. -weisa, n. pearl white. 

Seele, /. soul shaft (of a blast furnace) core (as of a rope or cable) bore (of a tube). Seelenruhc,/. tranquillity mental rest. See-iicht, n. marine phosphorescence, -luft, /. sea air. -moos, n. sea moss, carrageen, -pflanze,/. marine plant, sea plant, -rose,/, water lily (esp., Nymphaea). -salz, n. sea salt, -sand, m. sea sand, -schiick, m. sea ooze, -seide,/. sea silk (from algae) byssus silk, -tang, m. seaweed (esp., Fucua), sea tang, -tier, n. marine animal -wasser, n. sea water. 

Nursing alcohol lamps and charcoal fires in his tiny home laboratory during the Easter vacation of 1856, a teenager slowly teased out the constituents of a black and tarry goo. Working nights, weekends, and holidays on chemistry, he was searching for a test-tube substitute for quinine, the antimalaria drug derived from plants. The black precipitate he had made was obviously not quinine, but the youth was well trained in chemistry, so he did not throw it out. Instead, he treated it with alcohol, and a fabulously intense purple appeared. Then he tested the purple on a piece of silk. 

PLACE TEST TUBES IN AND. NOTE RESULT. WOOL AND SILK HAVE DISSOLVED, THE OTHERS NOT. 

Jensen, R.A. and Morse, D.E., The bioadhesive of Phragmatopoma californica tubes a silk-like cement containing l-DOPA, J. Comp. Physiol. B, 158, 317, 1988. 

Figure 97 Containers blow-moulded or extruded for a variety of household goods and toiletries. The Sqezy (centre) was made by Cascelloid, Leicester, from flexible plastic tube with metal ends, and it is understood to have been the first developed in Britain. Most of the others were made wholly from plastics, particularly polyethylenes of various densities. The containers demonstrate the use of silk-screen printing in a variety of colours for work of this kind.

To evaluate the linearity of the analysis with the amount of silk contained in the reaction tubes, several fabric solutions were prepared by adding 10 and 30 mg of the ground specimen, as well as the standard 20 mg, to the reaction tubes. 

Use Radiation source in industrial thickness gauges, elimination of static charge, treatment of eye diseases, in radio-autography to determine the uniformity of material distribution, in electronics for studying strontium oxide in vacuum tubes, activation of phosphors, source of ionizing radiation in luminous paint, cigarette density control, measuring silk density, atomic batteries, etc. 

Members of this family build a sack-like, silken tube in foliage or under bark or stones as a lair. In nature, this species are usually found in foliage, but some species are found inside houses and around other human developments. Once indoors, they may build their silk retreats in the upper corners and the ceiling-wall junctions of rooms and rest there during the day, in basements and crawl spaces, retreats are found where joists and band boards meet the subflooring. At night, sack spiders are often seen run-... 

B) Natural fiber solubility tests Here the same general procedure and test tube set-up will be used except that we will be testing the solubility of three natural fibers - cotton, wool and silk in two solvents ... 

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