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marquis test

A widely used presumptive test that gives a variety of colour changes with a range of compounds. It is particularly useful for detecting opiate alkaloids and for amphetamines and ...

Marquis test

Marquis test   Quick reference

A Dictionary of Chemistry (8 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Chemistry
Length:
122 words

... test A widely used presumptive test that gives a variety of colour changes with a range of compounds. It is particularly useful for detecting opiate alkaloids and for amphetamines and methamphetamine. Marquis reagent is a mixture of methanal (formaldehyde) solution in water with sulphuric acid. Mescaline gives an orange coloration. With morphine, a violet colour is produced. Amphetamines give an orange-red colour and methamphetamine gives an orange colour. The two can be distinguished by the Simon test . The mechanism involves attack of the aldehyde...

marquis test

marquis test   Quick reference

A Dictionary of Law Enforcement (2 ed.)

Reference type:
Subject Reference
Current Version:
2015
Subject:
Law
Length:
33 words

... test A test used to spot‐test some illegal drugs. A small quantity of the suspected drug is added to a reagent, which changes colour in the presence of opiate drugs and...

Marquis test

Marquis test   Quick reference

A Dictionary of Forensic Science

Reference type:
Subject Reference
Current Version:
2013
Subject:
Science and technology, Law
Length:
107 words

... test One of the most widely used presumptive tests in forensic drug analysis. It works by forming highly conjugated dye with the target drugs. The Marquis reagent is prepared by adding a 40 per cent solution of formaldehyde to concentrated sulphuric acid (H 2 SO 4 ). When added to opiates such as heroin , a purple dye is formed while amphetamine and methamphetamine generate an orange coloured dye. Many other drugs react with the Marquis reagent as well. The results of a colour test are not sufficient to identify a drug, but it is useful for screening...

marquis test

marquis test  

A widely used presumptive test that gives a variety of colour changes with a range of compounds. It is particularly useful for detecting opiate alkaloids and for amphetamines and methamphetamine. ...
27 The History of the Book in the Iberian Peninsula

27 The History of the Book in the Iberian Peninsula   Reference library

María Luisa López-Vidriero

The Oxford Companion to the Book

Reference type:
Subject Reference
Current Version:
2010
Subject:
History, Social sciences
Length:
6,347 words
Publisher:
Oxford University Press

...legal, industrial, and economic aspects of the printed book. Lisbon reflected this vitality: the number of booksellers swelled to 750, mostly of Portuguese origin. A similar increase occurred among the printers, especially from 1756 onwards. Until José I’s death in 1777 , the marquis of Pombal’s political programme, most notably the expulsion of the Jesuits in 1759 , promoted this noteworthy growth. In Spain, a change of dynasty began to take place in 1700 with the death of Charles II . The house of Bourbon entered Spain with Philip V (born at...

psilocybin

psilocybin  

A hallucinogen, similar in effect to psi mescaline, found in certain species of mushroom. It is accompanied by a related, more active, compound psilocin. Both are classified as class A drugs in the ...
Ruses d'amour

Ruses d'amour  

Reference type:
Overview Page
(The Trial of Damis)Ballet in one act with choreography by Petipa and music by Glazunov. Premiered 29 Jan. 1900 at the Hermitage Theatre, St Petersburg, with Legnani and Gerdt. It tells the story of ...
morphine

morphine  

Reference type:
Overview Page
An opiate that is the main active constituent of opium. It is used medically in the relief of severe pain, and can be acetylated to produce heroin. Morphine can be detected by the Marquis test.
Guglielmo Marconi

Guglielmo Marconi  

Reference type:
Overview Page
(1874–1937)Italian electrical engineer, the best known and most successful pioneer of radio telegraphy. He was awarded the Nobel Prize for Physics (jointly) in 1909.Marconi was born in Bologna, the ...
Charles James Fox

Charles James Fox  

(1749–1806).Educated at Eton and Oxford, Fox entered the House of Commons while still under age in 1768. He held minor office under North but fell foul of the king over the Royal Marriages Act. Once ...
Sleeping Beauty

Sleeping Beauty  

Reference type:
Overview Page
(Fr. title La Belle au bois dormant; Russ. title Spyashchaya krasavitsa)Ballet in prologue and three acts with choreography by Petipa, libretto by Petipa and Ivan Vsevolozhsky, music by Tchaikovsky, ...
Charles II

Charles II  

(1630–85),king of England, Ireland, and Scotland (acceded 1649, restored 1660–85). Charles received his practical education in 1648–51 when he learnt how to adapt to rapidly changing circumstances, ...
morphine

morphine   Quick reference

A Dictionary of Chemistry (8 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Chemistry
Length:
37 words

...An opiate that is the main active constituent of opium. It is used medically in the relief of severe pain, and can be acetylated to produce heroin. Morphine can be detected by the Marquis test...

psilocybin

psilocybin   Quick reference

A Dictionary of Chemistry (8 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Chemistry
Length:
48 words

...A hallucinogen, similar in effect to psi mescaline , found in certain species of mushroom. It is accompanied by a related, more active, compound psilocin . Both are classified as class A drugs in the UK. They can be detected by the Marquis test or the Froehde test...

Popenjoy, Lord

Popenjoy, Lord   Reference library

Oxford Reader's Companion to Trollope

Reference type:
Subject Reference
Current Version:
2011

...Lord , son of Frederick Augustus , Marquis of Brotherton, and the Italian Marchioness. The legitimacy of this infant provides the novel's title and his death renders the unanswered question moot. His existence serves as a litmus test for the other characters' sensibilities. Only his father and Lady George Germain express any regret at his death. IHP MG Mickie...

heroin

heroin   Quick reference

A Dictionary of Chemistry (8 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Chemistry
Length:
54 words

... ( diacetylmorphine ) A highly addictive drug produced by acetylating morphine . It is usually used as the hydrochloride. In the UK it is a class A drug but can be prescribed as a painkiller under the name diamorphine . The Marquis and Froedhe tests are used to give an initial indication of...

Marquis wheat

Marquis wheat   Reference library

J. E. Rea

The Oxford Companion to Canadian History

Reference type:
Subject Reference
Current Version:
2004
Subject:
History, Regional and National History
Length:
167 words

... wheat . A hybrid strain developed in response to the difficulties of growing wheat on the Canadian prairies. The popular Red Fife variety had a long growing season, which made it vulnerable to early frosts. Beginning in 1892 , Charles Edward Saunders and his fellow agronomists of the Central Experimental Farm in Ottawa experimented with various crossbreeds. The most promising was a cross of Red Fife and Hard Red Calcutta wheat from India, dubbed Marquis wheat by Saunders. Tests that began in Ottawa in 1907 indicated its high bread-making strength....

presumptive tests

presumptive tests   Quick reference

A Dictionary of Forensic Science

Reference type:
Subject Reference
Current Version:
2013
Subject:
Science and technology, Law
Length:
313 words

...results in the emission of light. Sensitivities of these tests vary, but it is usually possible to detect blood that has been diluted several hundred or thousandfold.Perhaps in no other forensic area are preliminary colour tests used more than in drug analysis. These tests are designed to narrow down the possibilities when an unknown substance is delivered to the laboratory for identification. Examples include the Marquis test and the cobalt thiocyanate test . The other large group of screening tests targets the components of gunshot residue (GSR) and...

Ruses d'amour

Ruses d'amour   Quick reference

The Oxford Dictionary of Dance (2 ed.)

Reference type:
Subject Reference
Current Version:
2010
Subject:
Performing arts, Dance, Music
Length:
66 words

...) Ballet in one act with choreography by Petipa and music by Glazunov . Premiered 29 Jan. 1900 at the Hermitage Theatre, St Petersburg, with Legnani and Gerdt . It tells the story of a duchess's daughter, Isabella, who disguises herself as a servant to test whether her fiancé, the Marquis Damis, loves her for herself rather than for her...

Griselda

Griselda ([Lit.])   Quick reference

A Dictionary of Reference and Allusion (3 ed.)

Reference type:
Subject Reference
Current Version:
2010
Subject:
Language reference
Length:
116 words

... [Lit.] The heroine of the last tale of Boccaccio's Decameron ( 1353 ), used by Chaucer for ‘The Clerk's Tale’ ( c .1387 ) in The Canterbury Tales . Griselda's husband, the Marquis Walter, subjects her to various cruelties to test her love and patience, including making her believe that her children have been murdered and that he intends to divorce her and remarry. Griselda bears his cruelty to the end, when her children are restored to her and her husband accepts her again as his wife. > A patient or obedient wife Clifford didn't look happy but he...

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