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Microplastics end up in food

07.06.2019

The average person eats at least 50 microplastics a year and breathes in the same number more. This is evidenced by data from a scientific study at the University of Victoria in Canada.

Researchers report that in fact, the amount of plastic ingested by a person can be much higher. Since a small number of products were analyzed for plastic content in the study. For example, drinking bottled water will dramatically increase the rate.

At the moment, the exact effect of plastic on the body is still unknown, but it is very clear that microparticles are capable of releasing toxic substances. Also, some pieces of plastic are small enough to penetrate human tissue and trigger an immune response.

Microplastic air pollution comes from the decay of plastic waste, which is abundant all over the planet.

The scientists analyzed 26 previous studies that analyzed the content of microplastics in fish, shellfish, sugar, salt, beer and water, as well as in the air within cities.

Researchers estimate that adults eat about 50 micropalstic particles a year, and children about 000.

But most of the products have not been tested. Scientists suspect that the content of plastic in foods such as bread, meat, dairy products and vegetables may be even higher.

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Random news from the Archive

Subcutaneous fingerprint scanner 03.11.2015

Apart from the investigative authorities collecting fingerprints at the crime scene, the usual procedure involves the use of scanners. The pad of the finger is placed on the scanner glass, and the light reflected from the finger forms a unique pattern on the image. However, this generally effective method sometimes fails with worn or damaged fingers, and the scanner can be fooled using gelatin finger castings popular in spy movies.

To improve the efficiency of the scientists of the Paris Institute. Langevin developed a new type of scanner that looks under the skin of the finger. The scanner uses optical coherence tomography (OCT), which is used for non-invasive examination of thin layers of skin and mucous membranes, eye and dental tissues of a person. The physical principle of operation of OCT is similar to ultrasonic research, but OCT uses optical radiation in the near infrared range (about 1 μm) rather than acoustic waves to probe biological tissue. In this case, the interference pattern that occurs when two beams of light are combined, one of which serves as a standard, and the second is passed through a biological tissue sample, is studied. In this way, an "internal fingerprint" is obtained, located half a millimeter under the surface of the skin, which exactly repeats the "real" print in its intact form.

The French method uses the so-called full-field OCT, which is a more compact version of rather large and expensive setups. The resulting shoebox-sized prototype costs more than $40 for a specialized infrared camera, although scientists have obtained satisfactory results with a camera that cost five times less. However, with all the miniaturization and optimization, the cost of the device is unlikely to drop below $000.

Therefore, those who wish to use fingerprints for home security can be advised to use a device created by American scientists at the University of California. It uses ultrasound to create XNUMXD fingerprints and could one day replace a capacitive sensor mobile scanner that exploits the difference in electrical capacitance between the ridge and the groove as their distances to the sensor pad are different.

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