Heterogeneous catalyst reduces the cost of synthesis of cyclic polymers

Chemists from the USA, South Korea, Hungary and Switzerland have developed a heterogeneous ruthenium-based catalyst for the synthesis of cyclic polymers from cyclopentene. They also managed to come up with a reaction installation that makes it easy to separate the catalyst from the reaction products. The study was published in Nature Chemistry. Linear polymers containing… Continue reading Heterogeneous catalyst reduces the cost of synthesis of cyclic polymers

An organometallic cocatalyst helped produce ammonia by electrolysis

Chemists from the USA have found a cobalt-based cocatalyst, which, together with a tungsten-based catalyst, makes it possible to effectively produce ammonia from nitrogen under electrolysis conditions. Thanks to this combination of catalysts, the process was able to be carried out at a relatively high potential of −1.35 volts and with a current efficiency of… Continue reading An organometallic cocatalyst helped produce ammonia by electrolysis

The population of the ancient Carthaginian city turned out to be genetically diverse

Paleogeneticists have read 30 genomes of ancient inhabitants of Tunisia, central Italy and Sardinia dating back to the Iron Age. In all regions, they found both descendants of more ancient local populations and immigrants from other territories. Thus, in the necropolis near the Carthaginian city of Kerkuan there were the remains of the descendants of… Continue reading The population of the ancient Carthaginian city turned out to be genetically diverse

Paleogeneticists read the genome of the “warrior with a griffin” from Nestor’s palace

Paleogeneticists have studied the origins of populations whose history is known from written sources. They discovered that the Mycenaeans arose from the mixing of Minoans and migrants whose origins were connected with the Eurasian steppe. However, the famous “warrior with a griffin,” whose rich burial was found in Pylos several years ago, did not have… Continue reading Paleogeneticists read the genome of the “warrior with a griffin” from Nestor’s palace

Malaysian researchers modeled the appearance of a “Penang woman”

Malaysian researchers have shown what a woman whose remains were discovered at the Neolithic site of Guar Kepa in Penang state might have looked like. The age of the so-called “Penang woman” is estimated at more than 5,000 years. To reconstruct the face, specialists used the method of forensic approximation and virtual 3D reconstruction. The… Continue reading Malaysian researchers modeled the appearance of a “Penang woman”

Physicists have taught drop crystals to self-assemble

American physicists have shown that the Rayleigh-Plateau instability, which is responsible for the splitting of jets into droplets, can be used to self-assemble droplets into two-dimensional crystals with a high degree of order. To do this, it is necessary that drops be formed line by line when the nozzle moves horizontally in a medium of… Continue reading Physicists have taught drop crystals to self-assemble

Maternal asthma altered child's DNA methylation profile

Having asthma in the mother is associated with an increased risk of developing asthma in the child – a group of US biologists found that this is due to epigenetic changes that are passed on to the child during fetal development. Article published in the magazine Proceedings of the National Academy of Sciences. Asthma is… Continue reading Maternal asthma altered child's DNA methylation profile

Geochemists have discovered Type Ia supernova material in a meteorite for the first time.

The chemical composition of the Hypatia meteorite suggests that its parent body contained interstellar dust formed during a Type Ia supernova explosion. This is the first discovery of its kind and supports the idea that the average chemical composition of the solar system is different from that of the interstellar medium. Article published in the… Continue reading Geochemists have discovered Type Ia supernova material in a meteorite for the first time.

Antidepressants have not improved Americans' quality of life

An analysis of the medical records of 17.5 million Americans with depression, of whom more than half were taking antidepressants, found that these drugs did not significantly affect quality of life. How reported In the magazine PLOS Onethis figure was approximately the same in both people taking medications and people without them. Depression can negatively… Continue reading Antidepressants have not improved Americans' quality of life

Noble Avars turned out to be genetically close to the ancient Mongols

Paleogeneticists have read 66 genomes of people from the 4th–8th centuries, whose remains were found in the Carpathian Basin. It turned out that the noble Avars who migrated to the region in the second half of the 6th century were approximately 90 percent descended from northeast Asians. They showed the greatest similarity with an individual… Continue reading Noble Avars turned out to be genetically close to the ancient Mongols