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13 godz. temu · Fentanyl is a highly potent synthetic piperidine opioid primarily used as an analgesic.It is 20 to 40 times more potent than heroin and 100 times more potent than morphine; its primary clinical utility is in pain management for cancer patients and those recovering from painful surgeries. Fentanyl is also used as a sedative. Depending on the method of delivery, fentanyl can be very fast acting ...
13 godz. temu · Vanadium is a chemical element; it has symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer ( passivation) somewhat stabilizes the free metal against further oxidation .
13 godz. temu · Microscopic structure The amorphous structure of glassy silica (SiO 2) in two dimensions. No long-range order is present, although there is local ordering to the tetrahedral arrangement of oxygen (O) atoms around the silicon (Si) atoms. Microscopically, a single crystal has atoms in a near-perfect periodic arrangement; a polycrystal is composed of many microscopic crystals; and an amorphous ...
13 godz. temu · Cold fusion. Diagram of an open-type calorimeter used at the New Hydrogen Energy Institute in Japan. Cold fusion is a hypothesized type of nuclear reaction that would occur at, or near, room temperature. It would contrast starkly with the "hot" fusion that is known to take place naturally within stars and artificially in hydrogen bombs and ...
13 godz. temu · Otto Hahn (pronounced [ˈɔtoː ˈhaːn] ⓘ; 8 March 1879 – 28 July 1968) was a German chemist who was a pioneer in the fields of radioactivity and radiochemistry.He is referred to as the father of nuclear chemistry and father of nuclear fission.Hahn and Lise Meitner discovered radioactive isotopes of radium, thorium, protactinium and uranium.He also discovered the phenomena of atomic ...
13 godz. temu · Denmark (Danish: Danmark, pronounced ⓘ) is a Nordic country in the south-central portion of Northern Europe.It is the metropolitan part of and the most populous constituent of the Kingdom of Denmark, a constitutionally unitary state that includes the autonomous territories of the Faroe Islands and Greenland in the North Atlantic Ocean. Metropolitan Denmark is the southernmost of the ...
13 godz. temu · A banana is an elongated, edible fruit – botanically a berry – produced by several kinds of large herbaceous flowering plants in the genus Musa.In some countries, cooking bananas are called plantains, distinguishing them from dessert bananas.The fruit is variable in size, color, and firmness, but is usually elongated and curved, with soft flesh rich in starch covered with a peel, which may ...
