Eureka! Science News September 15, 2022

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Seams are not visible

In Russia, they created the first method of healing the skin and internal organs without scarring.

After complex surgical operations, rough connective tissue scars almost always remain. If on the skin it is “not very pretty”, then on the internal organs, scars can prevent them from functioning. Existing healing methods have limitations. For example, traditional needle and thread sutures are not always applicable in operations on mucous membranes and blood vessels. “Suturing” with electric and ultrasonic welding can damage healthy tissue. And glue joints are sometimes not strong enough.

Scientists from NRU “MIET” and Sechenov University have developed a method that ensures the restoration of cuts in body tissues without scars. As a solder, a bioorganic composition based on albumin, blood transport protein, as well as an optical absorber of indocyanine green and single-walled carbon nanotubes is used. Welding is applied to the wound area, after which its edges are welded with a laser equipped with an intelligent temperature feedback system, which allows controlling the intensity of the radiation. The components of the weld are selected in such a way that they absorb radiation as much as possible in the wound area: it is transformed from a liquid into a solid porous biocomposite that firmly connects the edges of the incision. As the compound cures, the tissues “pop” into the structure, it gradually dissolves and is excreted from the body. Already after the operation, such sutures have a width 3-4 times smaller than “ordinary”. And after ten days, they are almost invisible.

How to make a diamond

Russian scientists have discovered how the melts that form diamonds appear in the Earth’s mantle.

Most diamonds form at a depth of 150-200 km at pressures of 5-7 hPa. But for carbon to crystallize and become diamond at such pressures, we also need catalysts, melts. Since synthetic diamonds are grown using melts of iron, nickel, cobalt, or manganese, diamonds in nature were once believed to grow from melts of metals. Yes, this can be, but only if the depth exceeds 670 km. And most diamonds contain other inclusions, ranging in composition from potassium aluminosilicate to alkaline carbonate and hydrogen chloride (chloride).

Scientists from the Institute of Geochemistry and Analytical Chemistry. VI Vernadsky RAS conducted experiments at a pressure of 6 hPa – corresponds to a depth of 200 km. Scientists believe that the crystallization of most natural diamonds occurs from melts, the material of which was sediments washed from the continents into the oceans, carbonates and salts of sea water that fell into the Earth’s mantle as a result of the movement of oceanic plates.

Plastic that is useful

Queen’s University Belfast has developed a plastic film that kills viruses.

Light is still needed for the effect, but room lighting is sufficient. The film is coated with a thin layer of particles that absorb ultraviolet light and produce reactive oxygen species. They help kill viruses, including SARS-CoV-2. The film also successfully self-cleared two strains of influenza A virus and picornavirus EMCV.

Another advantage is the reusable film. The development is supposed to be used in medical institutions, public places and food production.

They will be overcome

Rostec developed the first mobile complex to search for stolen cars.

It’s called “Search-Nano”. The hardware and software complex includes a video surveillance module (it is installed in a patrol car), a tablet and software. This thing can recognize license plates at a distance of 100 – 150 me checks the databases of stolen cars. If the kidnappers will kindly leave the old numbers on the car and approach the patrol cars, they will contribute a lot to progress.

Ancient murders

Sometimes, even after a thousand years, it can be established: the deceased died such a death that it cannot be called rest. This happened with mummies from pre-Columbian America.

Three mummies (two males and one female) have been kept in different museums in Europe since the end of the 19th century, and now they have decided to get a CT scan. The mummy from the Philipp University of Marburg (Germany) is a 20-25-year-old man from the fishing community of the Arica culture, which existed in northern Chile. The time of death cannot be precisely established: between 996 and 1147 AD, but it is obvious that the circumstances were tragic. According to the CT scan results, the fisherman died. Either one killer, standing to the right of the victim, hit him on the head and then stabbed him, or there were two attackers.

The mummy of a man who died between 902 and 994 AD (kept in the Swiss Delémont Museum), was found to have a fatal injury to the cervical spine. A mummified woman who died between 1224 and 1282 AD (also from a Swiss museum), there was a lot of damage, but as it turned out, she died of natural causes and the skeleton was damaged during burial.


According to Lenta.ru, TASS, RIA Novosti


The material was published in the newspaper “St. Petersburg Vedomosti” number 172 (7255) dated September 15, 2022 under the title “Eureka! Science News September 15, 2022”.

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