Free technical library. Articles from the journal Science and Life, 2017

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Alphabetical list articles with annotations from journals published in 2017 in the journal Science and Life:

1917 - the last copper coins of the Russian Empire

1917: Alternatives

Avogadro and the number of his name

Automotive sociology

Academician Valery Bondur: We can see everything from above!

Calcium carbide alcohol

Diamond needles made of carbon ice

diamond-like

Altai firebird

Altamira, Lascaux, Chauvet

Antihydrogen: a new era of antimatter experiments

Mr Horn's Pharmacy

Flavored oatmeal cookies

Eggplant blue and red

Bacteriophages: killers as saviors

Baron Munchausen in life and literature

Without end and without edge, a dream!

Safe fuel tank for hydrogen transport

Tickets, cards, wristbands and RFID

Biographies of new elements

Is there a horizontal surface of water?

Visit Robinson Crusoe

In the enchanted realm of weeping

In defense of disorder

Don't breathe in traffic!

In the man-made forest

Come back, you bastard!

renewable atom

The crow will not miss

Where are many, many wild monkeys?

Where was the fortress of Temryuk located?

Where did Steller's cow graze?

Where is the worst climate

Flexible solar panel

Hybrid kittens help save endangered wild cat species

GOST and its relatives

mushroom hunting

Let there be darkness!

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Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Slow life saves from deadly mutations 05.08.2019

If a mutation spoils some very important gene, then it would be natural to expect that with such a mutation the organism will not last long, and will die during embryonic development. On the other hand, there are cases when an important gene is simply absent in the genome, and this does not affect health in any way. Usually in such cases it is said that the genome is a system with a sufficiently high reliability, that genes can "insure" each other, and that the work of genes depends on the current context. One can imagine that the context was such that an important gene turned out to be unimportant, and a harmful mutation turned out to be harmless.

But context is too general a word. Scientists from Northwestern University (Chicago, USA) investigated one of the context options - metabolic rate. Experiments were performed with Drosophila larvae, in which a whole class of genes encoding microregulatory RNAs (miRNAs) was switched off. These RNAs are small molecules that interact with other "large" messenger RNAs and prevent them from synthesizing proteins. That is, miRNAs inhibit protein synthesis. In this role, they are very important just for individual development, when you need to constantly turn on some genes and proteins, and turn off others. And so all such miRNAs were turned off in Drosophila, and they expected that the flies would develop defects incompatible with life.

Indeed, it was so, but only in those fruit flies in which the metabolism proceeded at a normal rate. It was enough to slow down the metabolism at least by half (and for this, for example, it is enough to put flies on a starvation ration), as the negative effect of the missing regulatory RNAs almost disappeared. The organism did not seem to notice that a whole class of molecular genetic regulators had been taken away from it.

When interacting with each other, genes and proteins rely on feedback, when a signal from a partner helps to correct their own activity. But with a normal metabolism, feedback may not have time to work, which is why the role of assistant regulators is so important. If the metabolism slows down, then you can already do without them. It is likely that other dangerous mutations can also become harmless under changing environmental conditions, and this is probably one of the explanations for why abstinence in food helps to stay healthy longer - cells can afford to ignore some genetic problems.

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