Found technological method of producing nanofibers.
Engineers from the University of North Carolina have modified a known method of manufacture of nanofibers, significantly increasing the speed of their output.
The process of forming fibers with a diameter of ~100-1 000 nm of polymer solutions is called elektrodrazenie. In the design of a typical setup for “spinning” stand out a pump that provides a continuous flow of liquid to a conducting needle, collecting plate and the high voltage source, generating a field between the needle tip and the plate. The solution is in contact with a metal needle, charged, and put into it the charges are accelerated by the electric field and involve in the movement of the surrounding substance, whereby the fluid is accelerated uniformly in the sky, in a thin stream. In the interelectrode gap, the solvent partially evaporates, and the stream turns into fiber, which is deposited on the plate and creates a porous layer.
Amateurs homemade flower is always a problem: who will water the flowers when it’s vacation or leaving the country?
Sales occurring in the pencil with eraser on the end is very convenient: it is always possible to erase an inaccurate line or bar.
Fluorescent lamp — gas discharge light source in which visible light is emitted mainly by the phosphor, which, in turn, glows under the ultraviolet radiation of the discharge; the discharge also emits visible light, but to a much lesser extent. Luminous efficacy of a fluorescent lamp is several times greater than incandescent lamps of similar power. The lifetime of fluorescent lamps can exceed 20 times the life of incandescent lamps while ensuring sufficient quality of power supply, ballast, and compliance with restrictions on the number of on / off.
Some time ago folding blades supplied by industry mainly for the army. Now widely available and are popular with motorists and hunters, geologists and fishermen, campers and even gardeners. This is understandable: compact tool regardless of the design, convenient for transportation and storage.
Frame double machine, dubbed “mouse”, welded from thin steel tubes. Front axle (Fig. 3) assembled from beams, two eyes and swing units of the front wheels. Axle are the axle adapted to pivot the sleeve at an angle of 98 ° and welded to it. Pivot arm has a bend of sheet steel with thickness 1.5 mm; pivot bushing it is attached by welding at an angle of 110°. Ring tail joints at the ends of the swivel levers are cut from steel pipe ø 12 mm.
Even if the fall was not very generous, still the outgoing summer leaves in the garden and in the garden after harvest a lot of vegetable waste. Some site owners try to get rid of them, just taking to the dump. A zealous owners know that the tops, the drops, trimming branches and foliage — all this could be for the following season, additional fertilizer and fertilizer for the new crop. So carefully raked-collect garden waste dumped in their allotted under this corner of the site and form a so-called compost heap, in which such accumulation will gradually pereplet and turn into nutritious organic fertilizer.
Shelving design furniture is widely used by home craftsmen. It is easy to manufacture, versatile and easy to use. It can be an open Cabinet in the workshop or in the kitchen, pantry or hallway.
Beauty flowers accentuate the original holder. It stands and platforms made in a “vegetative” style and successfully resonate with large leaves and branches of trees.