General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

Nitrogen deposition and forest degradation

Science; General science

Nitrogen is an element of contrasts. In ecological systems, nitrogen is both abundant and limiting, is an essential nutrient and a pollutant, and is driven by natural and human-induced ecological ...

Computer storage

Science; General science

Once considered novelties, small, portable pen-based computers (sometimes called personal digital assistants or PDAs) are growing in popularity, fueled by the demands of an increasingly mobile ...

Phytoplankton

Science; General science

Mostly autotrophic microscopic algae which inhabit the illuminated surface waters of the sea, estuaries, lakes, and ponds. Many are motile. Some perform diel (diurnal) vertical migrations, others ...

Sheep

Science; General science

Sheep are members of the family Bovidae in the order Artiodactyla, the even-toed, hoofed mammals. Sheep were possibly the first animals to be domesticated about 11,000 years ago in southwestern ...

Avalanche

Science; General science

In general, a large mass of snow, ice, rock, earth, or mud in rapid motion down a slope or over a precipice. In the English language, the term avalanche is reserved almost exclusively for snow ...

Concentration scales

Science; General science

Numerical systems defining the quantitative relations of the components of mixtures. In solutions the concentration is expressed as the mass, volume, or number of moles of solute present in ...

Low-molecular-mass (generally 500–1000 daltons) molecules that have a high specificity for chelating or binding iron. Siderophores are produced by many microorganisms, including bacteria, yeast, and ...