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

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

Daily inhalation of laughing gas left the patient unable to walk

American doctors described in The New England Journal of Medicine rare medical case. A patient was admitted to the hospital with symptoms of severe vitamin B deficiency.12 – impaired sensitivity and coordination of movements, up to the inability to walk. It turned out that over the past two months he had been inhaling nitrous oxide… Continue reading Daily inhalation of laughing gas left the patient unable to walk

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

An antilaser with a degenerate cavity turned out to be an excellent absorber

Physicists combined the idea of ​​a coherent ideal absorber (antilaser) with the concept of a degenerate resonator. The constructed optical system effectively absorbs light incident on it from various angles, and its operation has proven to be resistant to typical interference in optical communication lines. The study was published in Science. Absorption is an important… Continue reading An antilaser with a degenerate cavity turned out to be an excellent absorber

Watering with ethyl alcohol protected the rhizome from drought

Japanese geneticists have proposed increasing the drought resistance of plants using ethanol. They watered Tal's rhizomes (Arabidopsis thaliana) with a weak alcohol solution for three days and showed that this helped the plants survive the subsequent three-week drought. In response to alcohol, the plant activates the synthesis of the stress phytohormone, abscisic acid, which helps… Continue reading Watering with ethyl alcohol protected the rhizome from drought

Coordination polymers caused water to absorb oxygen

Chemists from the USA have developed several microporous materials capable of forming stable colloidal solutions in water and in this form absorbing carbon dioxide and oxygen. To do this, the scientists used compounds with a hydrophilic outer surface and a hydrophobic pore surface. This made it possible to increase the ability of water to dissolve… Continue reading Coordination polymers caused water to absorb oxygen

Perseverance discovered volcanic rocks instead of sedimentary ones in Jezero Crater

The Perseverance rover discovered volcanic rocks in the Jezero Crater. This contradicts the expectations of scientists who expected to see sedimentary deposits. Their absence may indicate that the lake at this place disappeared too quickly, and sedimentary rocks did not have time to form. Two articles (1 and 2) devoted to the results of Perseverance’s… Continue reading Perseverance discovered volcanic rocks instead of sedimentary ones in Jezero Crater

Bioarchaeologists have discovered differences in the diet of men and women from a Roman necropolis

Bioarchaeologists from Spain and South Africa conducted a study of human and animal bones excavated in a Roman necropolis of the 2nd–3rd centuries AD in Barcelona. It turned out that most often the meat of pigs, large and small livestock was used as offerings, that is, species that were regularly eaten in everyday life. At… Continue reading Bioarchaeologists have discovered differences in the diet of men and women from a Roman necropolis

Gut bacteria helped bees communicate

Scientists from Germany and Switzerland have assessed the contribution of the gut microbiome to the social behavior of bees. It turned out that it makes bees interact with each other more often. Moreover, metamorphoses in insect behavior are accompanied by changes in gene expression and metabolite synthesis in the brain. The results of the study… Continue reading Gut bacteria helped bees communicate