pyridine
pyridine or azine , C 5 H 5 N, colorless, flammable, toxic liquid with a putrid odor. It melts at -42°C and boils at 115.5°C. Chemically, it is a heterocyclic aromatic tertiary amine (see under amino group ). Its molecule resembles that of benzene, one carbon-hydrogen unit in the benzene ring being replaced with a nitrogen molecule. It is miscible with water and with most organic solvents. Its aqueous solution is slightly alkaline. Pyridine is used as a solvent, as a denaturant for alcohol, and as a starting material in the synthesis of other compounds. Compounds that can be derived from pyridine include antihistamines and vitamins. Pyridine is obtained from bone oil or from coal tar by destructive distillation, which decomposes alkaloids that contain it. Alkaloids that contain pyridine include coniine, piperine (the alkaloid in pepper), and nicotine (present in tobacco); free pyridine is present in tobacco smoke.
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A noble set of books: Mark Evans reviews an exhibition on one of the most celebrated libraries of the Italian renaissance, created by Federico da Montefeltro, duke of Urbino.(EXHIBITIONS)
Magazine article from: Apollo; 11/1/2007; ; 700+ words
; Federico da Montefeltro, Duke of Urbino, was idealised as...the double portrait of Federico da Montefeltro and his son Guidobaldo (Fig. 1...crown and the duke's arms into a Montefeltro heraldic beast. This imposing piece...
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The Montefeltro conspiracy; a Renaissance mystery decoded.(Brief article)(Book review)
Magazine article from: Reference & Research Book News; 11/1/2008; 519 words
; 9780385524681 The Montefeltro conspiracy; a Renaissance mystery decoded. Simonetta, Marcello. Doubleday 2008 251 pages $26.00 Hardcover DG737 Simonetta...
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Federico di Montefeltro's hyperkyphosis: a visual-historical case report.(Case report)(Case study)
Magazine article from: Journal of Medical Case Reports; 1/21/2008; ; 700+ words
; ...evidence-based medicine. Federico di Montefeltro (1422-1482), a renowned historical...performed using the non-MeSH term Montefeltro . A total of five articles were retrieved...She faces her husband, Federico di Montefeltro, who is depicted in a left lateral...
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Montefeltro Silver shotgun.(NEW PRODUCTS)
Magazine article from: Guns Magazine; 10/1/2006; 425 words
; From Benelli USA The Montefeltro Silver shotgun from Benelli LISA features the fast-firing inertia driven system to deliver impressive performance in an elegant...
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Francesco di Simone Ferrucci: Itinerari di uno scultore fiorentino fra Toscana, Romagna e Montefeltro.(Book review)
Magazine article from: Renaissance Quarterly; 3/22/2008; ; 700+ words
; Linda Pisani. Francesco di Simone Ferrucci: Itinerari di uno scultore fiorentino fra Toscana, Romagna e Montefeltro. Fondazione Carlo Marchi. Studi 21. Florence: Leo S. Olschki, 2007. x + 226 pp. + 211 b/w pls. index. illus. bibl...
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Sperandio's medals. (medals depicting Giovanni Bentivoglio and Federico da Montefeltro made by Sperandio of Mantua)
Magazine article from: History Today; 4/1/1995; ; 700+ words
; Luke Syson on how artifice, art and political calculation mingled to produce medal portraits for two of Renaissance Italy's `warhorses', Giovanni Bentivoglio and Federico da Montelfeltro. With the ever-increasing enthusiasm, in the courtly and scholarly circles of fifteenth-century Italy, for the
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The Realms of Glory
Newspaper article from: The Washington Post; 12/6/1992; ; 700+ words
; ...Uffizi, "Portraits of Federigo da Montefeltro and Battista Sforza"), his meticulously...objects he studies; his section on the "Montefeltro Altarpiece" - also known as the Brera...such as the significance of Federigo da Montefeltro's old dented helmet in the Montefeltro...
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 "The New York Observer (New York, NY)")
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A Noble's Notebooks.
Newspaper article from: The New York Observer (New York, NY); 6/26/2007; 700+ words
; Federico da Montefeltro has one of the most memorable noses...the duke can be seen in Federico da Montefeltro and His Library, an exhibition at...Museum. Double Portrait of Federico da Montefeltro and His Son Guidobaldo (ca. 1475...
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Murder in the Duomo
Newspaper article from: The Washington Post; 9/30/2008; ; 700+ words
; ...Simon & Schuster. 513 pp. $32 THE MONTEFELTRO CONSPIRACY A Renaissance Mystery Decoded...Florence. Marcello Simonetta's "The Montefeltro Conspiracy," while also focusing on...book's title refers to Federico da Montefeltro, who was among the most prominent of...
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HISTORY SAUL DAVID ON A TALE OF RIVALRY AND BACK-STABBING IN MEDIEVAL ITALY
Newspaper article from: The Sunday Telegraph London; 4/6/2008; ; 700+ words
; ...most prominent Condottieri clans, the Montefeltro and the Malatesta, promising a story...of the vendetta between Federico III Montefeltro and Sigismondo Pandolfo Malatesta...Sigismondo in 1462. Thereafter the Montefeltro ruled supreme, with Federico involved...
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Montefeltro
Book article from: The Concise Oxford Dictionary of Art and Artists
Montefeltro. Italian noble family that ruled Urbino from 1234 with short intervals...this period Urbino was of only local importance, but under Federico da Montefeltro (1422–82; ruled from 1444) the city had a brief golden...
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Piero della Francesca
Book article from: The Concise Oxford Dictionary of Art and Artists
...career. The most important of his patrons was Federico da Montefeltro and Piero probably spent much of his later career working...works are probably the Madonna and Child with Federico da Montefeltro ( c. 1475, Brera, Milan) and the unfinished Nativity...
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Urbino
Book article from: The Columbia Encyclopedia, Sixth Edition
...a former Roman community. The town flourished under the Montefeltro family (12th-16th cent.) and then under the Della Rovere...before coming under the papacy. The court of Federigo da Montefeltro, 2d duke of Urbino (1444-82), was a great artistic...
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Santi, Giovanni
Book article from: The Oxford Dictionary of Art
...paintings than for a long rhymed chronicle about Federico da Montefeltro , Duke of Urbino, which he wrote in 1484–7 and presented to the young Guidobaldo da Montefeltro in about 1492. This work is undistinguished as literature...
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Pacioli, Luca
Dictionary entry from: Complete Dictionary of Scientific Biography
...publisher and he went to Venice to supervise the printing. He dedicated the book to the young duke of Urbino, Guidobaldo da Montefeltro (1472 – 1508), who, it is believed, was his pupil. The dedicatory letter suggests that Pacioli had been closely...
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