The tape will not curl. Drawing, description

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The tape will not curl. Tips for the home master

Builder, home master

Using adhesive tape - a transparent adhesive tape - is in many cases much more convenient than using glue. There is only one inconvenience: it is difficult to glue long sheets with it: the adhesive tape is twisted, deformed, and the quality of gluing decreases significantly.

In this case, the simplest device will help you. All you need is a steel plate, a rubberized roller (a piece of steel tube with a piece of rubber hose stretched over it) and a file handle. How the device is assembled can be seen from the figure. The roller and roll of adhesive tape are fixed to the plate with suitable screws.

Tape won't curl

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Perhaps there are planets inhabited by intelligent dinosaurs 17.04.2012

A study by Columbia University professor Ronald Breslow opens up new insights into possible alien life. It is possible that intelligent "tyrannosaurs" with the intelligence and cunning of people can live on other planets, and it is better for us not to meet them.

Ronald Breslow is trying to unravel the ultimate mystery of life: why terrestrial amino acids (which make up proteins), sugars, and the genetic material of DNA and RNA exist in basically the same orientation. There are two possible orientations: left and right, they mirror each other just like human hands. This phenomenon is known as "chirality". In order for life to arise, proteins must contain only one type of amino acid: left or right. With the exception of a few bacteria, the amino acids of terrestrial living things are left-handed, and most sugars are right-handed. How did this homochirality come about?

According to Breslow, the "seeds of life" (amino acids) are formed in interstellar space, possibly on asteroids. Initially, there is an equal number of left and right amino acids. But under the influence of stellar radiation, one of the forms of amino acids is selectively destroyed. The fact is that stars emit polarized light, and depending on the type of polarization, either left-handed or right-handed amino acids "survive". Then meteorites with amino acids fall on the planet and give rise to "left" or "right" life.

Breslow believes that about 4 billion years ago, an unknown meteorite or asteroid fell to Earth and "set the standard" for earthly life: left-handed amino acids. Breslow's research shows how important cosmic amino acids are to the development of life. In particular, this means that life in space can be very common, albeit in a different form from the earth. It is possible that a distant unknown star has a different polarization and gave birth to beings completely different from people based on right amino acids and left sugars.

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