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Manganin is a trademarked name for an alloy of typically 84.2% copper, 12.1% manganese, and 3.7% nickel. It was first developed by Edward Weston in 1892, improving upon his Constantan (1887). Manganin foil and wire is used in the manufacture of resistors , particularly ammeter shunts , because of its virtually zero temperature coefficient of ...
Copper alloys of manganese, such as Manganin, are commonly found in metal element shunt resistors used for measuring relatively large amounts of current. These alloys have very low temperature coefficient of resistance and are resistant to sulfur. This makes the alloys particularly useful in harsh automotive and industrial environments.
Very importantly, constantan can be processed for self-temperature compensation to match a wide range of test material coefficients of thermal expansion.A-alloy is supplied in self-temperature-compensation (S-T-C) numbers 00, 03, 05, 06, 09, 13, 15, 18, 30, 40, and 50, for use on test materials with corresponding thermal expansion coefficients, expressed in parts per million by length (or μm ...
A guinea pig as a classroom pet.. Classroom pets are animals that are present in an educational classroom as a pet. [1] Research and literature in the 21st century has shown the main reasons for having classroom pets is to capture the attention of students, improve relationships, provide the opportunity for creative activities, be a resource for humane education, and act as a motivator for ...
Minecraft: 2009 $3.3 billion: Merchandise sales – $3.367 billion [dp] Video game Markus Persson: Mojang Studios (Xbox Game Studios) Bratz: 2001 $3.23 billion: Retail sales – $3.15 billion [dq] Box office – $26 million [423] Home entertainment – $56.7 million [424] Doll Carter Bryant: MGA Entertainment: Care Bears: 1981 $3.05 billion
The magainins are a class of antimicrobial peptides found in the African clawed frog (Xenopus laevis). [1] The peptides are cationic, generally lack a stable conformation in water but form amphipathic α-helix in membranes; their mechanism against micro-organisms is unclear but they disrupt the cell membranes of a broad spectrum of bacteria, protozoa, and fungi.
Chronic exposure to excessive manganese levels can lead to a variety of psychiatric and motor disturbances, termed manganism. Generally, exposure to ambient manganese air concentrations in excess of 5 micrograms Mn/m 3 can lead to manganese-induced symptoms.
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