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A good example is the formation of adducts between the Lewis acid borane and the oxygen atom in the Lewis bases, tetrahydrofuran (THF): BH 3 ·O(CH 2) 4 or diethyl ether: BH 3 ·O(CH 3 CH 2) 2. Many Lewis acids and Lewis bases reacting in the gas phase or in non-aqueous solvents to form adducts have been examined in the ECW model. [3]
DNA adduct. In molecular genetics, a DNA adduct is a segment of DNA bound to a cancer-causing chemical. This process could lead to the development of cancerous cells, or carcinogenesis. DNA adducts in scientific experiments are used as biomarkers of exposure. They are especially useful in quantifying an organism's exposure to a carcinogen. [1]
North American English regional phonology is the study of variations in the pronunciation of spoken North American English (English of the United States and Canada)—what are commonly known simply as "regional accents". Though studies of regional dialects can be based on multiple characteristics, often including characteristics that are ...
The major native dialects of English are often divided by linguists into three general categories: the British Isles dialects, those of North America, and those of Australasia. [2] Dialects can be associated not only with place but also with particular social groups. Within a given English-speaking country, there is a form of the language ...
Regional vocabulary within American English varies. Below is a list of lexical differences in vocabulary that are generally associated with a region. A term featured on a list may or may not be found throughout the region concerned, and may or may not be recognized by speakers outside that region. Some terms appear on more than one list.
The Mid-Atlantic accent, or Transatlantic accent, [ 1 ][ 2 ][ 3 ] is a nickname for various accents of English that are perceived as blending features from both American and British English. Most commonly, it refers to accents of the late 19th century to mid-20th century spoken by the Northeastern American upper class, as well as related ...
The accents of English in Wales are strongly influenced by the phonology of the Welsh language, which more than 20% of the population of Wales speak as their first or second language. The North Wales accent is distinct from South Wales. North East Wales is influenced by Scouse and Cheshire accents.
In sociolinguistics, an accent is a way of pronouncing a language that is distinctive to a country, area, social class, or individual. [1] An accent may be identified with the locality in which its speakers reside (a regional or geographical accent), the socioeconomic status of its speakers, their ethnicity (an ethnolect), their caste or social class (a social accent), or influence from their ...