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Web in industry

07.11.2015

The web, which signals to its owner that fresh food has arrived, is a protein rich in glycine, alanine and serine.

Inside the arachnoid gland, it exists in liquid form, but when released from the body, the structure of the protein changes, as a result of which it solidifies into a thin sticky thread. In terms of strength, the web is close to nylon and has a paradoxical hinge: the thread can be freely rotated in one direction and it will never twist.

Scientists from the Virginia Polytechnic Institute (USA) have long been interested in the unusual properties of the web in order to adapt this natural glue for human needs. In the course of numerous observations, it has been established that ultraviolet rays are an important environmental factor for creating a web.

For example, the web of spiders that hunt in sunlight was found to be much more resistant to ultraviolet light than the web of nocturnal inhabitants, suggesting certain adaptive abilities.

Scientists added ultraviolet radiation to the list of factors such as humidity, temperature and strain rate. By carefully studying the properties of the web, the researchers hope to create an environmentally friendly adhesive inspired by the spider's glycoprotein filament.

The ability of the web to resist ultraviolet light will help scientists create a technology to protect polymers from the degradation that plastic undergoes due to exposure to UV radiation.

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Tattoo keeps you healthy 06.06.2017

MIT lab researchers have developed a tattoo ink that changes color based on glucose levels and pH in the body.

The project, called DermalAbyss, is the result of a collaboration between students from the Massachusetts Institute of Technology and students from Harvard Medical School. They have developed a method that will replace conventional tattoo inks with biosensors, fluids that change color in response to changes in a person's blood flow. According to students, in this way they can "turn the body into an interactive display."

"We have created 4 biosensors that respond to three parts of the biochemical composition of the blood," said the research team. "The pH sensor changes from purple to pink, the glucose sensor changes between blue and brown, and the sodium sensor and another pH sensor fluoresce."

Now biochemists are testing the ink on pigs, but in the future it could be used as a medical tool for humans. For example, diabetic patients no longer have to use a glucometer to check their blood sugar levels - simply control the color of the tattoo.

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