Is it worth believing the centenary calendar? Detailed answer

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Is it worth believing the centenary calendar? Detailed answer

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Is it worth believing the centenary calendar?

Attempts to predict, at least in general terms, the weather for many years ahead were made as early as the 1652th century, first in Nuremberg by Mauritsius Knauf for 1658-1670, then by an associate of Peter I, general, scientist and "warlock" Yakov Vilimovich Bruce (1735 -100) XNUMX years ahead. These attempts were not crowned with success. Only in our time, on the basis of an analysis of the influence of terrestrial and cosmic factors, quite successful forecasts are made, which, however, are not recognized by professional meteorologists.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

How many eyes does an eyeless big-eyed spider have?

a) No eyes.
b) There are no eyes, but they are large.
c) One big eye that doesn't work.
d) 144 eye-like warts.

He has no eyes.

The blind arachnid was first discovered in 1973, and the entire population lives in three impenetrable caves on the volcanic island of Kauai, which is part of the Hawaiian archipelago.

As is often the case with cave dwellers, the spider evolved without the need for vision, however, being a representative of the big-eyed spider family, it simply must be called "big-eyed" (that is, if its eyes did cut through, they would certainly be large).

Adults are comparable in size to a fifty pence coin. A friend-neighbor and at the same time the main food source of the eyeless big-eyed spider is the Kauai cave amphipod: a small crustacean resembling a blind translucent shrimp.

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Ultrasonic tweezers move living cells 13.07.2012

Bioengineers and biochemists at the University of Pennsylvania have developed a miniature ultrasound device capable of capturing and moving single cells and tiny living organisms. The coin-sized device can be used to work with live samples such as blood cells or bacteria. Using a new device called acoustic tweezers, scientists have already been able to manipulate roundworm (Caenorhabditis elegans) 1 mm long. This organism is an important model for the study of several human diseases.

Acoustic tweezers are also capable of manipulating living cells, which are essential to many areas of basic biomedical science. The device is based on the use of a piezoelectric material that vibrates under electrical voltage. Vibrations induce surface acoustic waves in the liquid medium around the cell culture. With simple electronics, acoustic waves can be manipulated and organic and inorganic materials can be moved.

The main advantage of acoustic tweezers is their harmlessness to living cells. Currently, scientists use lasers to manipulate such samples. However, they consume 10 million times more energy and can heat up and damage cells.

Acoustic tweezers turned out to be very versatile: with its help, you can control both one particle and tens of thousands. For example, ultrasonic tweezers can place drugs directly on a bacterium and at the same time exert pressure on its cell wall. It can also be used to sort blood cells and cancer cells.

Currently, the size of objects that can be moved with acoustic tweezers ranges from micrometers to millimeters. The developers note that when using higher frequencies, it will be possible to move nano-sized objects.

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