Light radiation is one of the damaging factors during the explosion of a nuclear weapon, which is thermal radiation from the luminous area of the explosion. Depending on the power of the ammunition, the action time ranges from a fraction of a second to several tens Read More
Saprotrophs and their role in biogeocenosis. Saprotrophic bacteria feed
Saprophytic bacteria are one of the most numerous groups of microorganisms. If we talk about the place of saprotrophs in ecological systems, they always displace heterotrophs. Heterotrophs are organisms that cannot produce organic compounds themselves. Read More
General characteristics of memory (functions, types of memory)
Every person throughout his life accumulates certain information, experience and knowledge that he needs in various areas of his activity. All this is possible thanks to memory. Without it, humanity would never have achieved progress and is still Read More
What properties characterize both the molecule and the substance?
A substance can be in three states of aggregation: solid, liquid and gaseous. Molecular physics is a branch of physics that studies the physical properties of bodies in various states of aggregation based on their molecular structure. Thermal movement Read More
See what the “Koch Curve” is in other dictionaries Objects with fractal properties in nature
The fractal snowflake, one of the most famous and mysterious geometric objects, was described by Helga von Koch at the beginning of our century. According to tradition, in our literature it is called Koch’s snowflake. This is a very “prickly” geometric figure, which is metaphorical Read More
Adjacent and vertical angles
Let us recall the theorem on the equality of crosswise angles: If two parallel lines are intersected by a transversal, then the crosswise angles are equal. Theorem: If two parallel lines are intersected by a transversal, then the corresponding angles are equal. Proof: Let the parallel Read More
Using interactive support in chemistry lessons using the example of the lesson "oxygen nitrogen compounds"
The chemical element nitrogen forms a fairly large number of oxides, in which its oxidation state varies from +1 to +5. All nitrogen oxides are thermally unstable and decompose when heated, releasing oxygen. This is why nitrogen oxides are Read More
The concept of embryo fragmentation
Cleavage is the division of the embryo, but this division is somewhat different from the usual division by mitosis: during cleavage, the presynthetic phase G1 is absent, therefore the daughters (fledglings (blastomeres) after mitosis do not synthesize proteins and do not grow - with each division Read More
Use of alcohols in medicine Solvents, surfactants
Scientists have repeatedly proven that moderate alcohol consumption is not only not harmful, but also beneficial. According to scientists from the University of Rochester, alcohol has a beneficial effect on the heart, kidneys and even the liver, as well as on the nervous system. Read More
International social movements against drugs
It was not until the 19th century that the governments of most countries realized the real threat posed to society by drug use. Since that time, a large-scale fight against drug addiction began, aggravated by the fact that in most cases it is the spread Read More