Ion which negates another oppositely-charged ion in an ionic molecule
Polystyrene sulfonate, a cation-exchange resin, is typically supplied with Na+ as the counterion.
In chemistry, a counterion (sometimes written as "counter ion", pronounced as such) is the ion that accompanies an ionic species in order to maintain electric neutrality. In table salt (NaCl, also known as sodium chloride) the sodium ion (positively charged) is the counterion for the chloride ion (negatively charged) and vice versa.
A counterion will be more commonly referred to as an anion or a cation, depending on whether it is negatively or positively charged. Thus, the counterion to an anion will be a cation, and vice versa.
In biochemistry, counterions are generally vaguely defined. Depending on their charge, proteins are associated with a variety of smaller anions and cations. In plant cells, the anion malate is often accumulated in the vacuole to decrease water potential and drive cell expansion. To maintain neutrality, K+ ions are often accumulated as the counterion. Ion permeation through hydrophobic cell walls is mediated by ion transport channels. Nucleic acids are anionic, the corresponding cations are often protonated polyamines.
sodium ion (positively charged) is the counterion for the chloride ion (negatively charged) and vice versa. A counterion will be more commonly referred to...
Counterion condensation is a phenomenon described by Manning's theory (Manning 1969), which assumes that counterions can condense onto polyions until the...
monomer unit. The counterion produced by the initiator-coinitiator complex is less nucleophilic than that of the Brønsted acid A− counterion. Halogens, such...
Look up counter in Wiktionary, the free dictionary. Counter may refer to: Counter machine, a subclass of register machines Counter (digital), an electronic...
The Counter is a high-end casual dining restaurant chain in the United States, Mexico, Ireland, Saudi Arabia, Ghana, and Japan offering custom-topped...
A Geiger counter (/ˈɡaɪɡər/, GY-gər; also known as a Geiger–Müller counter or G-M counter) is an electronic instrument used for detecting and measuring...
A web counter or hit counter is a publicly displayed running tally of the number of visits a webpage has received. Web counters are usually displayed...
Cross Counter (foaled 5 April 2015) is a Thoroughbred racehorse best known for winning the 2018 Melbourne Cup. After winning two minor races he was gelded...
Under the Counter is the third studio album by Welsh rap group Goldie Lookin Chain. It was released on 17 March 2008 under Shellshock Records, after the...
James Nicholas Counter III (1940–2009) was an American labor attorney, who served as the long-standing president of the Alliance of Motion Picture and...
The Uncanny Counter (Korean: 경이로운 소문) is a 2020 South Korean television series starring Jo Byeong-kyu, Yoo Jun-sang, Kim Se-jeong, Yeom Hye-ran, Ahn Suk-hwan...
A ring counter is a type of counter composed of flip-flops connected into a shift register, with the output of the last flip-flop fed to the input of the...
amino group of Val562 and provide a counterion for Asp740 in this active complex. Two candidates for this counterion have been suggested: Ile1 of streptokinase...
instance of the above Counter Culture (album), a 2005 album by Roy Harper Counter Culture (EP), an EP by British India Counter Culture (TV pilot), an...
A counter machine or counter automaton is an abstract machine used in a formal logic and theoretical computer science to model computation. It is the most...
Mechanical counters are digital counters built using mechanical components. Long before electronics became common, mechanical devices were used to count...
Counterintelligence (counter-intelligence) or counterespionage (counter-espionage) is any activity aimed at protecting an agency's intelligence program...
Counterterrorism (alternatively spelled: counter-terrorism), also known as anti-terrorism, relates to the practices, military tactics, techniques, and...
In a court of law, a party's claim is a counterclaim if one party asserts claims in response to the claims of another. In other words, if a plaintiff initiates...
A lunch counter or luncheonette is a small restaurant, similar to a diner, where the patron sits on a stool on one side of the counter and the server serves...
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