Wooden sickles more than 7,000 years old found in Italy

Archaeologists presented the results of a study of three wooden sickles discovered during underwater excavations at the Early Neolithic site of La Marmotta in Italy. It turned out that these tools were made more than seven thousand years ago from oak and wood belonging to the rose family. Ancient people used resin from pine trees… Continue reading Wooden sickles more than 7,000 years old found in Italy

Chemists have found ideal conditions for the hydrogen borrowing reaction

Chemists from Russia studied the hydrogen borrowing reaction necessary for the formation of carbon-nitrogen bonds. They found that it often does not require a catalyst at all, and also developed recommendations for successfully carrying out the reaction in the laboratory. The study was published in the journal Journal of Catalysis. Organic compounds containing an NH… Continue reading Chemists have found ideal conditions for the hydrogen borrowing reaction

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

James Webb finds organic molecules in icy particles around a very young protostar

The James Webb Infrared Space Telescope has reliably discovered a number of organic molecules, including complex ones, in the composition of ice particles in the core of the very young protovesche IRAS 15398−3359. In addition, the telescope examined the structure of one of the outflows of matter from the protostar, which consists of four shells.… Continue reading James Webb finds organic molecules in icy particles around a very young protostar

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

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

Scientists introduced bacteria into artificial urine and obtained phosphate stones

Polish physicists and chemists modeled the formation of phosphate kidney stones using artificial urine and uropathogenic bacteria. Experiments in vitro in combination with computer modeling showed that the region of optimal pH values ​​(pH-optimum) for the formation of struvite, a component of phosphate stones, lies in the range of 8–9, shifting to the neutral side… Continue reading Scientists introduced bacteria into artificial urine and obtained phosphate stones

An ancient treasure found near Kursk was associated with a military cult

Archaeologists examined an early Iron Age treasure discovered near Kursk. It includes five items: two rare bronze bracelets, a bronze mirror, and two iron spearheads. According to scientists, the treasure was buried in the 2nd–1st centuries BC. Perhaps it is associated with a military cult or was a gift to a deceased noble warrior. The… Continue reading An ancient treasure found near Kursk was associated with a military cult

Planetologists have confirmed the possibility of delivering volatile substances to the young Earth by asteroids

Planetologists presented new results from analyzing soil particles from the Ryugu asteroid in laboratory conditions. It turned out that the temperature inside Ryugu’s parent body could not exceed 30 degrees Celsius, and asteroids like Ryugu could indeed deliver volatile substances to the young Earth. Article published in the magazine Nature Astronomy.The near-Earth 900-meter asteroid Ryugu,… Continue reading Planetologists have confirmed the possibility of delivering volatile substances to the young Earth by asteroids