Category: Natural Sciences
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Chromium(II) chloride
Chromium(II) chloride, with the chemical formula CrCl2, is an inorganic compound containing chromium in its +2 oxidation state. It is a grayish-green solid and is one of the simpler chromium chloride compounds. However, chromium(II) compounds are not as common as those with higher oxidation states, such as chromium(III) and chromium(VI). Preparation of Chromium(II) Chloride: Chromium(II)…
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Chromium trioxide
Chromium trioxide, with the chemical formula CrO3, is an inorganic compound containing chromium in its +6 oxidation state. It is a highly oxidizing and hygroscopic substance that appears as a dark red-orange crystalline solid at room temperature. Preparation of Chromium Trioxide: Chromium trioxide is commonly prepared by the reaction of sodium dichromate (Na2Cr2O7) or potassium…
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Chromium pentafluoride
Chromium pentafluoride, with the chemical formula CrF5, is an inorganic compound composed of one chromium atom and five fluorine atoms. It is a coordination compound and is classified as a fluoride of chromium in its +5 oxidation state. Properties of Chromium Pentafluoride: Appearance: Chromium pentafluoride is a greenish-yellow crystalline solid at room temperature. Stability: It…
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Chromic acid
Chromic acid, with the chemical formula H2CrO4, is an inorganic compound that contains chromium in its +6 oxidation state. It is a strong oxidizing agent and a corrosive, reddish-brown, or dark red solution in water. Chromic acid is a powerful reagent used in various industrial and laboratory applications. Preparation of Chromic Acid: Chromic acid can…
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Konrad Emil Bloch
Konrad Emil Bloch (1912-2000) was a German-American biochemist who was awarded the Nobel Prize in Physiology or Medicine in 1964 for his discoveries concerning the biosynthesis of cholesterol and fatty acids. He was born on January 21, 1912, in Neisse, Germany (now Nysa, Poland), and passed away on October 15, 2000, in Lexington, Massachusetts, USA.…
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Günter Blobel
Günter Blobel (1936-2018) was a German-American cell biologist and biochemist who was awarded the Nobel Prize in Physiology or Medicine in 1999 for his significant contributions to our understanding of protein targeting and cellular localization. He was born on May 21, 1936, in Waltersdorf, Germany, and passed away on February 18, 2018, in New York…
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Pieter Bleeker
Pieter Bleeker (1819-1878) was a Dutch physician, naturalist, and ichthyologist known for his significant contributions to the study of fishes and other marine organisms. He was born on July 10, 1819, in Zaandam, Netherlands, and passed away on January 24, 1878, in Leiden, Netherlands. Key Contributions and Achievements: Ichthyological Research: Bleeker conducted extensive research on…
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William Thomas Blanford
William Thomas Blanford (1832-1905) was a British geologist, naturalist, and explorer known for his significant contributions to the fields of geology, meteorology, and zoology. He was born on October 7, 1832, in London, England, and passed away on June 23, 1905. Key Contributions and Achievements: Geological Surveys: Blanford conducted extensive geological surveys in various regions,…
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Frank Nelson Blanchard
Frank Nelson Blanchard (1888-1937) was an American botanist known for his contributions to the study of algae and freshwater plants. He was born on February 22, 1888, in Lawrence, Massachusetts, and passed away on March 5, 1937. Key Contributions and Achievements: Research on Freshwater Algae: Blanchard specialized in the study of freshwater algae, particularly the…
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Thomas Blakiston
Thomas Blakiston (1832-1891) was a British naturalist and explorer known for his contributions to the exploration and scientific study of North America and Asia. He was born on December 27, 1832, in Lymington, England, and passed away on October 15, 1891. Key Contributions and Achievements: Exploration of North America: Blakiston joined the British North American…