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Terephthalic acid is an aromatic dicarboxylic acid.
In the disciplines dealing with the human body, it is extremely important to precisely specify the planes, axes and directions.
An important archaeological site located on the right bank of the Danube in eastern Serbia, within the Iron Gates gorge.
Bulgaria's natural resources include a great variety of minerals.
This scene presents the climate zones and soil types of Bulgaria.
The raw material of chocolate, cocoa powder and cocoa butter is provided by a tropical plant.
An invasive predatory sea snail species that inhabits warm seas.
There are two basic cell types: prokaryotic and eukaryotic cells.
This scene explains the structure and functions of the bones.
The adrenal glands are responsible for maintaining homeostasis and producing a rapid response in stressful situations.
A canid similar to the wolf but smaller in size and more delicate in appearance.
Riverbed engineering refers to artificial modification of the course or flow of rivers.
The submarine designed by the Spanish inventor Narcís Monturiol was a pioneering work in the history of underwater navigation.
The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.
Through positron emission tomography (PET), visual information on the internal organs can be obtained without making any surgical incisions.
The animation shows the city of Szeged before it was devastated by the great flood.
Archaeological research has shown that a settlement has existed at the site of present-day Kecskemet, near the Chapel Street, already in the Árpád era.
The range of applications of unmanned aerial vehicles ('drones') keeps growing.
The vacuum cleaner creates a partial vacuum and sucks up dust with the help of the incoming high-pressure air.
This 3D scene presents the steps of the cement manufacturing process.
This 3D scene presents the flora and fauna of the last period of the Palaeozoic Era.
The castor bean tick is a parasite that feeds on the blood of most mammals, including humans, and transmits several diseases, including the Lyme disease.
The gate tower and the barbican were important parts of the defense system of medieval towns and castles.