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Instruction on labor protection for a retail worker. Full Document
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Intersectoral standard instructions on labor protection for retail workers
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Latest news of science and technology, new electronics:
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In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>
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| Random news from the Archive Nanotubes will help to collect oil
02.05.2012
Researchers from Rice University and Pennsylvania State University have found that adding boron to carbon during the process of making nanotubes turns them into a resilient sponge that can repeatedly soak up oil.
During the growth of carbon nanotubes, boron creates "knots" that promote the formation of covalent bonds and a new material with unique properties. So, during the experiments, the nanosponge was immersed in a cup of water with a film of used motor oil. The sponge absorbed the oil, after which it was set on fire. As a result, the oil burned out, and the sponge was again used to collect oil products. The sponge can be used repeatedly - it remains elastic after 10000 compressions. At the same time, the sponge can be used not only to purify water from oil products, but also to store various hydrocarbons. To extract oil from such a soft "tank" you just need to squeeze it.
The creation of covalent bonds between carbon nanotubes is an important technology required for the fabrication of three-dimensional structures from this promising material. Until now, the development of such structures remains a complex technological problem, and the study of American scientists in this regard is very important. The unique nanosponge was created using a common chemical vapor deposition process. Due to the addition of boron, atomic-scale "knots" and covalent bonds of carbon nanotubes were formed. A detailed elemental analysis showed that these "nodules" are centers of concentration of excess boron atoms.
The new technology opens up opportunities for the production of a variety of materials with unusual properties. In particular, the oil-absorbing nanosponge has light weight, superhydrophobicity, high porosity, heat resistance, and mechanical flexibility. In addition, it has magnetic properties, which makes it possible, for example, to drop tons of spongy mass onto the surface of an oil-polluted ocean, and then collect a high-tech sorbent using magnets.
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