Poor protein utilization contributes to neurodegeneration

Neurodegeneration can occur more quickly if nerve cells lack retromer proteins, which are responsible for breaking down toxic tau protein. This conclusion was reached by scientists who observed genetically modified fruit flies that produced human tau protein in 39 neurons of the eye. Tau protein itself already caused the death of nerve cells, and the… Continue reading Poor protein utilization contributes to neurodegeneration

Physicists have reproduced the chirping effect at the Kukulcan Pyramid

Colombian physicists have reproduced the unusual acoustic effect observed at the Temple of Kukulcan, located on the Yucatan Peninsula in Mexico. The echo of hand clapping at the base of the pyramid resembles the chirping or chirping of a bird. Simulations showed that this effect occurs due to the addition of many waves reflected from… Continue reading Physicists have reproduced the chirping effect at the Kukulcan Pyramid

Spectrometer based on LEGO constructor will make studying physics cheaper

German physics teachers made a universal spectrometer in the Czerny-Turner scheme using LEGO constructors and scrap materials. The authors showed that it can be used to study the spectra of atomic emission, transmission, reflection and fluorescence. Reconfiguring the device for different tasks takes a few minutes, and the total cost of the device does not… Continue reading Spectrometer based on LEGO constructor will make studying physics cheaper

Hormone injections improve cognitive performance in Down syndrome

Injections of a hormone from the hypothalamus, which is responsible for the development of the genital organs and is commonly used to treat infertility, have been able to improve cognitive performance in people with Down syndrome. This was discovered by European scientists who conducted a study on seven young men. After six months of living… Continue reading Hormone injections improve cognitive performance in Down syndrome

Ozonation of the air caused the skin to create an oxidative field around a person

Chemists from Germany, the USA and Denmark have found that substances secreted by human skin lead to the formation of an oxidative field around it. Scientists placed four people in a sealed mock-up office and began ozonizing the air to a level close to the maximum permissible concentrations. The experiment showed that ozone interacts with… Continue reading Ozonation of the air caused the skin to create an oxidative field around a person

MOXIE received 50 grams of oxygen from the Martian atmosphere in 9 hours

The team of the MOXIE experiment to obtain oxygen from the Martian atmosphere presented the results of its work on Mars for 2021. The device installed on the Perseverance rover worked for a total of almost 9 hours, during which time it generated 50 grams of oxygen suitable for human use. Thus, on the basis… Continue reading MOXIE received 50 grams of oxygen from the Martian atmosphere in 9 hours

Mirror light nuclei differed from heavy ones in the frequency of nucleon pair production

Physicists from 13 countries presented the results of a study of the relative frequency of production of short-range two-nucleon correlations in the lightest mirror nuclei containing three nucleons. The data were obtained for a certain kinematic range during electron scattering by nuclei. The collaboration found that in light nuclei, neutron-proton pairs are formed approximately twice… Continue reading Mirror light nuclei differed from heavy ones in the frequency of nucleon pair production

Biochemists have discovered the mechanism behind the red coloration of birds

Biochemists from the USA and Portugal have discovered how in vertebrate cells yellow carotenoid pigments are converted into red ketocarotenoids, which are responsible for the red coloration of some vertebrates. It turned out that this transformation requires two enzymes, and the third, auxiliary, plays the role of a carrier of reacting molecules. The study was… Continue reading Biochemists have discovered the mechanism behind the red coloration of birds

The smell of a woman prevented an antidepressant from calming mice

Scientists from the USA and Cyprus have found that the gender of the experimenter can influence the results of medical experiments on mice. It turned out that the smell of men causes stress in animals and a desire to escape from its source. But if a man injects a mouse with an antidepressant, its effect… Continue reading The smell of a woman prevented an antidepressant from calming mice

Metasurfaces emit entangled photons with variable wavelengths

American and German physicists have fabricated thin metasurfaces consisting of arrays of silicon nanocavities that exhibit spontaneous parametric scattering. They showed that such structures are capable of generating entangled photons. Unlike traditional media used for this, metasurfaces have greater flexibility, which allows the wavelength of the resulting photons to be changed by changing the pump… Continue reading Metasurfaces emit entangled photons with variable wavelengths