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1. Crown ether: In organic chemistry, crown ethers are cyclic chemical compounds that consist of a ring containing several ether groups (R–O–R’). The most common crown ethers are cyclic oligomers of ethylene oxide, the repeating unit being ethyleneoxy, i.e., –CH2CH2O ... (Chemistry) [100%] 2023-05-04 [Crown ethers]
2. Crown ether: Crown ethers are heterocyclic chemical compounds that, in their simplest form, are cyclic oligomers of ethylene oxide. The essential repeating unit of any simple crown ether is ethyleneoxy, i.e., -CH2CH2O-, which repeats twice in dioxane and six times in ... [100%] 2023-12-11 [Ethers] [supramolecular chemistry]...
3. Crown ether: Crown ethers are heterocyclic chemical compounds that consist of a ring containing several ether groups. The most common crown ethers are oligomers of ethylene oxide, the repeating unit being ethyleneoxy (-CH2CH2O-). Important members of this series are the tetramer (n ... [100%] 2023-02-04
4. Thia-crown ether: In chemistry, a thia-crown ether is an thia analogue of a crown ether (cyclic polyether). That is, it has a sulfur atom (sulfide linkage) in place of each oxygen atom (ether linkage) around the ring. (Chemistry) [81%] 2022-12-16 [Sulfur heterocycles] [Thioethers]...
5. Aza-crown ether: In organic chemistry, an aza-crown ether is an aza analogue of a crown ether (cyclic polyether). That is, it has a nitrogen atom (amine linkage, –NH– or >N–) in place of each oxygen atom (ether linkage, –O–) around the ... (Chemistry) [81%] 2023-06-27 [Ethyleneamines] [Chelating agents]...
6. Ethers: Ethers, in organic chemistry, compounds of the general formula R·O·R′, where R, R′ = alkyl or aryl groups. They may be regarded as the anhydrides of the alcohols, being formed by elimination of one molecule of water from two ... [80%] 2022-09-02
7. Crown: A crown is a traditional form of head adornment, or hat, worn by monarchs as a symbol of their power and dignity. A crown is often, by extension, a symbol of the monarch's government or items endorsed by it. (Form of headwear, symbolizing the power of a ruler) [76%] 2024-01-06 [Crowns (headgear)] [Formal insignia]...
8. Crown: A crown is a traditional form of head adornment, or hat, worn by monarchs as a symbol of their power and dignity. A crown is often, by extension, a symbol of the monarch's government or items endorsed by it. (Form of headwear, symbolizing the power of a ruler) [76%] 2024-01-12 [Crowns (headgear)] [Formal insignia]...
9. Crown (Stormzy song): "Crown" is a song by English rapper Stormzy, released on 21 June 2019 as the second single from his second studio album, Heavy Is the Head. It debuted at number five on the UK Singles Chart dated 28 June 2019 ... (Stormzy song) [76%] 2024-01-12 [2019 singles] [2019 songs]...
10. Crown: Crown and CORONET, an official or symbolical ornament worn on or round the head. corona) at first had no regal significance. It was a garland, or wreath, of leaves or flowers, conferred on the winners in the athletic games. [76%] 2022-09-02
11. Crown (manga): Crown (Japanese: クラウン, Hepburn: Kuraun) is a manga series written by Shinji Wada and illustrated by You Higuri. Crown was serialized in the shōjo manga magazine, Princess Gold magazine around 2005. (Manga) [76%] 2024-01-12 [Action anime and manga] [Akita Shoten manga]...
12. Crown: Biblical Data: The translation employed for five distinct Hebrew words in the Bible. It renders, first, "zer," a technical term used frequently in the Priestly portions of Exodus for the golden molding with which the Ark (xxv., and the altar ... (Jewish encyclopedia 1906) [76%] 1906-01-01 [Jewish encyclopedia 1906]
13. Crown (Band): Crown war eine Schweizer Rockband der 1970er und 1980er Jahre. 1978 gründeten Karel Káša Jahn, George Kozel und Peter Netopil, drei gebürtige Tschechen, mit Patrick Mason in Zürich die Band Crown. (Band) [76%] 2024-01-12
14. Crown (tooth): In dentistry, crown refers to the anatomical area of teeth, usually covered by enamel. The crown is usually visible in the mouth after developing below the gingiva and then erupting into place. (Tooth) [76%] 2023-12-05 [Human mouth anatomy]
15. Crown: CROWN kroun: The word crown in the Old Testament is a translation of five different Hebrew words, and in the New Testament of two Greek words. These express the several meanings, and must be examined to ascertain the same. 1 ... [76%] 1915-01-01
16. Crown (dentistry): Editor-In-Chief: C. Michael Gibson, M.S., M.D. (Dentistry) [76%] 2023-12-05 [Prosthodontology] [Restorative dentistry]...
17. Crown (English coin): The crown, originally known as the "crown of the double rose", was an English coin introduced as part of King Henry VIII's monetary reform of 1526, with a value of 1⁄4 of one pound, or five shillings, or ... (English coin) [76%] 2024-01-12 [Coins of England]
18. Crown (botany): The crown of a plant refers to the total of an individual plant's aboveground parts, including stems, leaves, and reproductive structures. A plant community canopy consists of one or more plant crowns growing in a given area. (Botany) [76%] 2024-01-12 [Plant morphology]
19. Crown (botany): The crown of a plant is the total of an individual plant's aboveground parts, including stems, leaves, and reproductive structures. A plant community canopy consists of one or more plant crowns growing in a given area. (Botany) [76%] 2024-05-30 [Plant morphology]
20. Crown (anatomy): The crown is the top portion of the head behind the vertex. The anatomy of the crown varies between different organisms. (Anatomy) [76%] 2024-09-11 [Bird anatomy] [Human head and neck]...