how was deinococcus radiodurans discovered?
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radiodurans was discovered in 1956 by Arthur Anderson at the Oregon Agricultural Experiment Station in Corvallis, Oregon. Experiments were being performed to determine whether canned food could be sterilized using high doses of gamma radiation.
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Summary: A decade ago, geobiologist Shuhai Xiao and his colleagues discovered thousands of 600-million-year-old embryo microfossils in the Doushantuo Formation, a fossil site near Weng'an, South China.
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The Discovery of Romulus & Remus The twins were first discovered by a she-wolf or lupa, who suckled them and they were fed by a wood-pecker or picus. Eventually, they were discovered and cared for by a shepherd and his wife: Faustulus and Acca Larentia. The two boys grew up to be shepherds like their adoptive father.
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Delvotest® SP-NT jest testem do wykrywania obecności środków hamujących takich jak antybiotyki i sulfonamidy. Przy jego użyciu można badać mleko zarówno pojedynczą próbkę w indywidualnym gospodarstwie jak i w dużych laboratoriach.
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Summary: The heaviest recognized chemical element with the atomic number 112 was discovered at the GSI Helmholtzzentrum für Schwerionenforschung and -- since February 19, 2010, -- officially carries the name copernicium and the chemical symbol "Cn".
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History of discovery Paul Villard, a French chemist and physicist, discovered gamma radiation in 1900, while studying radiation emitted from radium. ... In 1914, gamma rays were observed to be reflected from crystal surfaces, proving that they were electromagnetic radiation.
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The discovery of protons can be attributed to Rutherford. In 1886 Goldstein discovered existence of positively charged rays in the discharge tube by using perforated cathode. These rays were named as anode rays or canal rays.
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The microbiologist (and botanist) Martinus Beijerinck is credited with developing the first enrichment cultures. Sergei Winogradsky also experimented on bacteria using different cultures.
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When one whips the batter (rice + urad dal), air gets incorporated into the batter. Lactobacillus and other bacteria from that air and the hand consume the sugars in the batter (rice mainly) and produce CO2 (carbon dioxide). This is fermentation of dosa batter (ditto for idli batter).
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Radiolarians are exclusively open ocean, silica-secreting, zooplankton. They occur abundantly in major oceanic sites worldwide. ... Radiolarians are single-celled or colonial protozoa. The single-celled species vary in size from <100 μm to very large species with diameters of 1–2 mm.
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X-rays were discovered in 1895 by Wilhelm Conrad Roentgen (1845-1923) who was a Professor at Wuerzburg University in Germany. ... Roentgen shielded the tube with heavy black paper, and discovered a green colored fluorescent light generated by a material located a few feet away from the tube.
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Discovery: Flerovium was first produced in 1998 and announced in 1999 by Joint Institute of Nuclear Research scientists. They produced one atom of Element 114. Flerovium is a radioactive, synthetic element about which little is known. It is classified as a metal and is expected to be solid at room temperature.
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Iodinated contrast agents were developed in the 1920s. Starting as ionic, high osmolar contrast material (HOCM), contrast agents underwent further refinement during the 1960s with the introduction of nonionic compounds. Nonionic compounds do not dissociate in water; therefore, they are lower in osmolality.
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In the 1993 blockbuster, scientists find dinosaur DNA in an ancient mosquito caught in amber. But amber, it turns out, does not preserve DNA well. Researchers tried to extract DNA from two stingless bees preserved in copal, a precursor of amber, in a 2013 study published in the journal PLOS ONE.
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Members of the phylum Sarcodina are ameboid. They move about by using pseudopods and usually eat by phagocytosing food particles, usually bacteria. Some amoeba form calcium carbonate or silica skeletons called tests to protect themselves.
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The gamma irradiation process uses Cobalt 60 radiation to kill microorganisms on a variety of different products in a specially designed cell. Gamma radiation is generated by the decay of the radioisotope Cobalt 60, with the resultant high energy photons being an effective sterilant.
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In 1887 Heinrich Hertz demonstrated the existence of the waves predicted by Maxwell by producing radio waves in his laboratory. It took a bit longer for scientists to discover the higher-energy (shorter wavelength) light in the electromagnetic spectrum.