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In chemistry and biology, reactive oxygen species ( ROS) are highly reactive chemicals formed from diatomic oxygen ( O2 ), water, and hydrogen peroxide. Some prominent ROS are hydroperoxide (O 2 H), superoxide (O 2- ), [ 1] hydroxyl radical (OH. ), and singlet oxygen. [ 2] ROS are pervasive because they are readily produced from O 2, which is ...
Rho is classed as a liquid consonant (together with Lambda and sometimes the nasals Mu and Nu ), which has important implications for morphology. In both Ancient and Modern Greek, it represents an alveolar trill IPA: [r], alveolar tap IPA: [ɾ], or alveolar approximant IPA: [ɹ] . In polytonic orthography, a rho at the beginning of a word is ...
Two blue diagonal bands forming a St. Andrew's Cross on a white background. The national flag of the Russian Federation ( Russian: Государственный флаг Российской Федерации, Gosudarstvenny flag Rossiyskoy Federatsii) is a tricolour of three equal horizontal bands: white on the top, blue in the middle, and ...
The Rod of Asclepius takes its name from the Greek god Asclepius, a deity associated with healing and medicinal arts in ancient Greek religion and mythology. Asclepius' attributes, the snake and the staff, sometimes depicted separately in antiquity, are combined in this symbol. [ 2][full citation needed] The most famous temple of Asclepius was ...
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
The Tudor rose is a combination of the Red Rose of Lancaster and the White Rose of York. The Tudor rose (sometimes called the Union rose) is the traditional floral heraldic emblem of England and takes its name and origins from the House of Tudor, which united the House of Lancaster and the House of York. The Tudor rose consists of five white ...
Ø (or minuscule: ø) is a letter used in the Danish, Norwegian, Faroese, and Southern Sámi languages. It is mostly used as to represent the mid front rounded vowels, such as [ ø] ⓘ and [ œ] ⓘ, except for Southern Sámi where it is used as an [oe] diphthong . The name of this letter is the same as the sound it represents (see usage ).
Rose Cross. The Rose Cross (also called Rose Croix and Rosy Cross) is a symbol largely associated with the legendary Christian Rosenkreuz, a Christian Kabbalist and alchemist said to have been the founder of the Rosicrucian Order. [ 1][ 2] The Rose Cross is a cross with a rose at its centre, which is usually red, golden or white. [ 3]