| 词汇 | molybdenum |
| 释义 | molybdenum noun[ U ] uk /mɒlˈɪb.də.nəm/ us /mɑːˈlɪb.də.nəm/(symbolMo) a chemical element that is a very hard, silver-coloured metal, used especially to make steel stronger钼 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium lithium manganese nickel plutonium quicksilver selenium silicon sodium sulphur transition metal Examples of molybdenummolybdenum At present the most common form of the enzyme, which is present in all known modern diazotrophs, uses molybdenum. Effect of molybdenum concentration in the seed on the response of pasture legumes to molybdenum. The most commonly used metals are titanium, cobalt, chromium, molybdenum alloy and steel. The molybdenum isotope system is emerging as an indicator of global redox conditions. Only the nitrogenase iron protein is shown (residues % 1-274), the molybdenum-iron protein is omitted for clarity. Effect of molybdenum, phosphorus, and lime application to acid soils on dry matter yield and molybdenum nutrition on lentil. Copper and molybdenum absorption by rats given ammonium tetrathiomolybdate. Whether these elements, together with molybdenum and manganese, are deficient in mammal diets is not known. Plants require at least 16 such elements, and this book reviews our knowledge of seven of these (iron, manganese, copper, zinc, molybdenum, boron and chlorine) termed 'micronutrients'. Part of this section is a pepperpot mask which is basically a small molybdenum plate with hole borings that is mounted at an angle of 458 to the beam axis. Nitrogenase is a metalloenzyme, and the three known forms require molybdenum, vanadium or iron at a particularly important catalytic site. The remaining nine, which are present in small quantities, are the d-block elements vanadium, chromium, molybdenum, manganese, iron, cobalt, nickel, copper and zinc, and are known as the trace metals. There are other essential raw materials, some of them principally from abroad—manganese, tungsten, molybdenum, chrome. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 It is a wholly inadequate answer, and the absurdity of it comes out best with regard to manganese and molybdenum. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Secondly, there is the question of the production of molybdenum bearing steel. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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