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Glossary - Letter N

Nematoid - A worm-shaped animal that inhabits water or soil, which parasitizes plants and animals, including humans. Ecological niche - space occupied by an organism in the ecosystem, including its role in the community and its position in environmental gradients of temperature, humidity, pH, soil and other conditions of existence.
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Water Properties (Part 2)

Float or sink? Ever wonder why some objects sink in water? Why does a nail sink and a ship float on water? What makes water support some objects so that they can float on it? Understanding why some objects sink in water while others float is very important in building ships, submarines, etc.
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In details

The Photochemical Stage of Photosynthesis

See in more detail the photochemical phase. It is also called the "clear phase" of photosynthesis, as its occurrence is entirely dependent on light. As this is a stage that counts on the participation of chlorophyll molecules, it happens inside the tilacoids, in whose inner faces of their membranes the molecules of this photosynthesizing pigment are "anchored".
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Information

Ascariasis: Roundworm

It is a worms caused by a parasite called Ascaris lumbricoides. It is the most widespread human intestinal worms in the world. Contamination happens when there is ingestion of infected parasite eggs, which can be found in soil, water or food contaminated by human feces. The only reservoir is man.
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Cosmic panspermia or what?

To complete the 1920 theory of Aleksander I. Oparin (1894-1980) and English scientist John Burdon S. Haldane (1892 - 1964) about the origin of early living beings, Japanese researcher Yoshihiro Furukawa proposed that meteorite impacts on Earth's early oceans may also have been the cause of the formation of complex organic molecules that later originated life.
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Thermal conduction

Consider two iron cubes, one at 10 ° C and one at 30 ° C, that are not in direct contact, because between them was placed a layer of another material. If because of this, the thermal equilibrium is retarded, we say that this material is a thermal insulator. There is no perfectly insulating material that completely prevents heat exchange, but there are materials that, in practice, greatly slow the heat exchange.
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