Marquis test Quick reference
A Dictionary of Chemistry (8 ed.)
... 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 Quick reference
A Dictionary of Law Enforcement (2 ed.)
... 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 Quick reference
A Dictionary of Forensic Science
... 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
27 The History of the Book in the Iberian Peninsula Reference library
María Luisa López-Vidriero
The Oxford Companion to the Book
...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
Ruses d'amour
morphine
Guglielmo Marconi
Charles James Fox
Sleeping Beauty
Charles II
morphine Quick reference
A Dictionary of Chemistry (8 ed.)
...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 Quick reference
A Dictionary of Chemistry (8 ed.)
...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 Reference library
Oxford Reader's Companion to Trollope
...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 Quick reference
A Dictionary of Chemistry (8 ed.)
... ( 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 Reference library
J. E. Rea
The Oxford Companion to Canadian History
... 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 Quick reference
A Dictionary of Forensic Science
...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 Quick reference
The Oxford Dictionary of Dance (2 ed.)
...) 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 ([Lit.]) Quick reference
A Dictionary of Reference and Allusion (3 ed.)
... [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...
