Nghĩa của từ rhenium bằng Tiếng Anh

noun
1
the chemical element of atomic number 75, a rare silvery-white metal that occurs in trace amounts in ores of molybdenum and other metals.
The chemical properties are generally not of as much interest to scientists as are its radioactivity, although it is known that its properties are similar to those of manganese and rhenium , in the same group of the periodic table.
noun

Đặt câu với từ "rhenium"

Dưới đây là những mẫu câu có chứa từ "rhenium", trong bộ từ điển Từ điển Tiếng Anh. Chúng ta có thể tham khảo những mẫu câu này để đặt câu trong tình huống cần đặt câu với từ rhenium, hoặc tham khảo ngữ cảnh sử dụng từ rhenium trong bộ từ điển Từ điển Tiếng Anh

1. Bobbinite Rhenium metal does dissolve in liquid to cover

2. A preferred catalyst comprises palladium/silver alloy optionally with rhenium.

3. Worldwide, 30% of catalysts used for this process contain rhenium.

4. Like rhenium and palladium, technetium can serve as a catalyst.

5. Bohemium (bōhē´mēəm), former name of the chemical element rhenium

6. Allyl alcohol can be prepared by the rhenium catalyzed-deoxydehydratio n of glycerol

7. The catalyst comprises a solid-acid support such as mordenite plus a metal component such as rhenium.

8. A method is described for the separation of rhenium from molybdenum and vanadium by extraction with amyl alcohol.

9. The presence of the radioactive isotope rhenium-187 and its daughter isotope osmium-187 provides a useful geochronologic dating technique.

10. In processes such as the dehydrogenation of isopropyl alcohol, it is a far more effective catalyst than either rhenium or palladium.

11. Syntheses, Structures, Reactivities, and Basicities of Quinolinyl and Isoquinolinyl Complexes of an Electron Rich Chiral Rhenium Fragment and Their Electrophilic Addition Products

12. Effective p-type dopant and rhenium oxide for overcoming s-type current-voltage graph in organic photovoltaic cell using electron donor with low highest occupied molecular orbital energy level

13. In medical X-ray tubes the target is usually tungsten or a more crack-resistant alloy of rhenium (5%) and tungsten (95%), but sometimes molybdenum for more specialized applications, such as when softer X-rays are needed as in mammography.

14. This invention relates to a catalyst suitable for the epoxidation of olefine having no allylic hydrogen, in particular for the preparation of ethylene oxide, which catalyst comprises a catalytically effective amount of silver, a promoting amount of alkalimetal, a promoting amount of a heteropolyoxometalate of tungsten and/or molybdenum and optionally, a promoting amount of rhenium and/or a promoting amount of a rhenium co-promoter selected from sulphur, molybdenum, tungsten, chromium, phosphorus, boron and mixtures thereof, supported on a porous, refractory support.

15. The Aquation reactions of four rhenium(I) dicarbonyl complexes, [Re(CO)2(NN)(PR3)(Cl)], where NN = 1,10-phenanthroline (Phen) and 2,9-dimethyl-1,10-phenanthroline (DMPhen) and PR3 = 1,3,5-triaza-7-phosphaadamantane (PTA) and 1,4-diacetyl-1,3,7-triaza-5-phosphabicylco[3.3.1]nonane (DAPTA)