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Carl Friedrich Hindenburg (13 July 1741 – 17 March 1808) was a German mathematician born in Dresden. His work centered mostly on combinatorics and probability. [1] Infinitinomii dignitatum exponentis indeterminati historia leges ac formulae editio pluribus locis aucta et passim emendata, 1779
Barley straw, in England, is placed in mesh bags and floated in fish ponds or water gardens to help reduce algal growth without harming pond plants and animals. Barley straw has not been approved by the United States Environmental Protection Agency (EPA) for use as a pesticide and its effectiveness as an algaecide in ponds has produced mixed results during university testing in the United ...
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Algae is typically considered a nuisance and subject to removal through the use of algicides and the release of algae eaters. However, total elimination of algae is considered unlikely in a hobby aquarium. Algae can be used as an bioindicator to inform an aquarist on water chemistry and other conditions. [2]
Sand, gravel, crushed shell, and very well cycled filtered water from a successful saltwater aquarium, with the lowest attainable ammonia content, should be used. A small inoculation of live Spirulina algae may be introduced. Certain ubiquitous algae and bacteria are likely to be carried by the shrimp themselves and will soon colonize the walls ...
Spirogyra (common names include water silk, mermaid's tresses, and blanket weed) is a genus of filamentous charophyte green algae of the order Zygnematales, named for the helical or spiral arrangement of the chloroplasts that is characteristic of the genus. Spirogyra species, of which there are more than 500, are commonly found in freshwater ...
The Hindenburg Disaster: 6 May 1937 Sam Shere Manchester Township, New Jersey, United States Unknown The photograph depicts the Hindenburg Zeppelin on fire at the mooring mast of Lakehurst. [43] [s 3] [s 6] Bloody Saturday: 28 August 1937 H. S. Wong: Shanghai, China 35 mm The photograph depicts a baby in bombed-out ruins in Shanghai. [44] [s 2 ...
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