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Topic: Stanislao Cannizzaro


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  Stanislao Cannizzaro - Wikipedia
Stanislao Cannizzaro (Palermo, 13 luglio 1826 – Roma, 10 maggio 1910) è stato un chimico e politico italiano.
Dopo aver insegnato a Pisa e Napoli, occupa la cattedra di chimica organica e inorganica a Palermo: qui per dieci anni, fino al 1871, studia i composti aromatici e le amine.
Il cratere Cannizzaro, sulla Luna, è stato così battezzato in suo onore.
wikipedia.kataweb.it /wiki/Stanislao_Cannizzaro   (348 words)

  
  Stanislao Cannizzaro - Wikipedia, the free encyclopedia
Stanislao Cannizzaro (July 13, 1826 - May 10, 1910) was an Italian chemist.
During the Sicilian revolution he served as an artillery officer at Messina and was also chosen deputy for Francavilla in the Sicilian parliament; and after the fall of Messina in September 1848 he was stationed at Taormina.
Cannizzaro's scientific eminence in 1871 secured him admission to the Italian senate, of which he was vice-president, and as a member of the Council of Public Instruction and in other ways he rendered important services to the cause of scientific education in Italy.
en.wikipedia.org /wiki/Stanislao_Cannizzaro   (335 words)

  
 Stanislao Cannizzaro - Best of Sicily Magazine
This was soon named the "Cannizzaro effect." As professor of chemistry at Genoa in 1855, he showed that the atomic weights of elements in volatile compounds could be calculated by applying Avogadro's Principle.
Cannizzaro established values for atomic and molecular weights, incidentally distinguishing the two, designating the weight of hydrogen as the universal standard by which other elements should be measured.
Senator Cannizzaro lived to witness Italian troops disgraced in defeat at Adwa (in Ethiopia) and the consequential fall of the government of his fellow Sicilian revolutionary, the cunning Crispi.
www.bestofsicily.com /mag/art132.htm   (721 words)

  
 Cannizzaro, Stanislao   (Site not responding. Last check: 2007-11-07)
Cannizzaro was born in Palermo, Sicily, and studied at Palermo, Naples, and Pisa.
Cannizzaro's reaction involves the treatment of an aromatic aldehyde with an alcoholic solution of potassium hydroxide.
Reviving Avogadro's hypothesis 1858, Cannizzaro pointed out that once the molecular weight of a volatile compound had been determined from a measurement of its vapour density, it was necessary only to estimate, within limits, the atomic weight of one of its elemental components.
www.cartage.org.lb /en/themes/Biographies/MainBiographies/C/Cannizzaro/1.html   (252 words)

  
 Cannizzaro, Stanislao
It was at Alessandro that Cannizzaro completed his studies of the reaction in which the action of alkali on benzaldehyde generates benzoic acid and benzyl alcohol, which came to be known as the Cannizzaro reaction.
Cannizzaro was a talented organic chemist and an early leader in the discipline, but it is his contribution to the then-existing debate over atoms, molecules, and atomic weights for which he is best known.
Cannizzaro was present at the conference and spoke at length on virtually every subject that was debated.
www.chemistryexplained.com /Bo-Ce/Cannizzaro-Stanislao.html   (708 words)

  
 CANNIZZARO, STANISLAO (1826 - 1910)   (Site not responding. Last check: 2007-11-07)
When Cannizzaro wrote the Sunto, there was no agreement among chemists as to what values should be adopted for atomic, molecular, or equivalent weights; no possibility of systematizing the relationship of the various elements; and no unanimity as to how organic compounds should be formulated.
Cannizzaro showed how vapor densities could be used to determine molecular weights (and atomic weights), and he laid to rest completely the idea that inorganic and organic chemistry functioned by different rules.
As Tilden summed up his work in the Cannizzaro Memorial Lecture to the Chemical Society, "There is, in fact, but one science of chemistry and one set of atomic weights." It was Cannizzaro's recognition of true atomic weights that permitted Meyer and Mendeleev to formulate the periodic law at the end of the 1860's.
www.scs.uiuc.edu /~mainzv/exhibit/cannizzaro.htm   (269 words)

  
 Stanislao Cannizzaro at AllExperts
Stanislao Cannizzaro (July 13, 1826 - May 10, 1910) was an Italian chemist.
During the Sicilian revolution of independence of 1848 he served as an artillery officer at Messina and was also chosen deputy for Francavilla in the Sicilian parliament; and after the fall of Messina in September 1848 he was stationed at Taormina.
For this achievement, of fundamental importance for the atomic theory in chemistry, he was awarded the Copley Medal by the Royal Society in 1891.
en.allexperts.com /e/s/st/stanislao_cannizzaro.htm   (372 words)

  
 Stanislao Cannizzaro
In 1858, two years after Amedeo Avogadro's death, his fellow Italian Stanislao Cannizzaro (1826–1910) outlined a course in theoretical chemistry for students at the University of Genoa—where he had to teach without benefit of a laboratory.
Stanislao Cannizzaro at the age of 32, after a sketch by Demetrio Salazzaro.
He was born in Palermo, Sicily, where his father was a magistrate and the minister of police, and he later attended medical school there, which kindled an interest in chemistry.
www.chemheritage.org /classroom/chemach/periodic/cannizzaro.html   (376 words)

  
 Stanislao Cannizzaro Biography | World of Chemistry
Cannizzaro was born in Palermo, Italy, on July 13, 1826, and died in Rome on May 10, 1910.
In 1851, Cannizzaro returned to Italy where he held successive posts at the Collegio Nazionale in Alessandria, the University of Genoa (1855), the University of Palermo (1861), and the University of Rome (1871).
Cannizzaro read his pamphlet at the Congress and handed out copies to the delegates.
www.bookrags.com /biography/stanislao-cannizzaro-woc   (679 words)

  
 MeasureNet Chemistry Notables: Stanislao Cannizzaro
Stanislao Cannizzaro (1826-1910) Professor at Alessandria (1851-1854), Genoa (1855-1859), Palermo (1860-1869) and Rome (1870-1910), Cannizzaro is best known for his discovery of the Cannizzaro reaction in organic chemistry for the conversion of aromatic aldehydes into the corresponding acids and alcohols, and his successful resolution of the atomic weight problem.
In 1858 Cannizzaro published a small pamphlet in which he reasserted Avogadro's earlier hypothesis (1811) that gas densities at equal pressures were directly proportional to molecular weights.
With Cannizzaro's advance, chemists finally acquired a standard set of atomic weights and were able to determine unambiguous and universally accepted compositional formulas for their compounds.
www.measurenet-tech.com /MeasureNetChemistryNotablesStanislaoCannizzaro.html   (168 words)

  
 Il XIX secolo: Stanislao Cannizzaro
Sotto la direzione di questi, Cannizzaro esegue alcune ricerche sulla fisiologia del sistema nervoso sia in casa propria che in quella di Foderà, in quanto a Palermo non vi era un laboratorio di fisiologia.
Cannizzaro vede nel lavoro del chimico francese la soluzione delle cosiddette "densità anomale" del cloruro d'ammonio e del pentacloruro di fosforo, che risultavano maggiori di quelle previste dal principiodi Avogadro e Ampère e che avevano condotto il chimico Charles Gerhardt (1816-1856) ad abbandonare per la chimica inorganica quel princìpi o.
Cannizzaro muore a Roma il 10 maggio 1910.
www.accademiaxl.it /biblioteca/virtuale/percorsi/testi/percorsi.asp?page=16   (3396 words)

  
 VIRTUAL MUSEUM - The Directors and Politicians - Stanislao Cannizzaro
Piria engaged Cannizzaro as an extraordinary presetter of his lessons in Inorganic and Organic Chemistry, then sharing with him his researches on the chemistry of natural matters.
Cannizzaro was already designing some independent researches, when on July 1847, when he was on holidays in Sicily, he stopped there to prepare the rebellion against the Borbons.
We owe to Cannizzaro the first formal and stern promulgation of an atomic theory (Cannizzaro's Law) based on the principle of Amedeo Avogadro, who made possible to periodically classify elements, as can be seen in his famous book Sunto di un corso di filosofia chimica (1858) (Summary of a course in chemical philosophy).
www2.polito.it /strutture/cemed/museovirtuale/english/storia/2-02/2-2-01/2-2-0118.htm   (351 words)

  
 Stanislao Cannizzaro   (Site not responding. Last check: 2007-11-07)
Cannizzaro's greatest contribution to chemistry was his revival of the work of
His paper "Sketch of a Course of Chemical Philosophy", presented to the 1860 chemical conference at Karlsruhe, led to the recognition of the distinction between atomic and molecular weights.
He suggested that since hydrogen is the lightest of all gases, the weight of half a hydrogen molecule should be used as the standard to which all other weights were compared.
www.carlton.paschools.pa.sk.ca /chemical/Molemass/cannizar.htm   (72 words)

  
 Stanislao Cannizzaro - Search Results - MSN Encarta
Stanislao Cannizzaro - Search Results - MSN Encarta
After participating in the 1848 Sicilian revolution, Cannizzaro worked...
Chemistry, History of : notable scientists : Cannizzaro, Stanislao: Chemistry, History of
ca.encarta.msn.com /Stanislao_Cannizzaro.html   (67 words)

  
 1Up Science - Stanislao Cannizzaro Information
Life Cannizzaro was born in Palermo, Sicily, and studied at Palermo, Naples, and Pisa.
Cannizzaro's reaction Cannizzaro's reaction involves the treatment of an aromatic aldehyde with an alcoholic solution of potassium hydroxide.
Avogadro's hypothesis Reviving Avogadro's hypothesis 1858, Cannizzaro pointed out that once the molecular weight of a volatile compound had been determined from a measurement of its vapour density, it was necessary only to estimate, within limits, the atomic weight of one of its elemental components.
www.1upscience.com /stanislao-cannizzaro   (317 words)

  
 Stanislao Cannizzaro   (Site not responding. Last check: 2007-11-07)
He showed that the application of Avogadro's law (1811) could yield a comprehensible system of atomic weights.
At the first international congress of chemists at Karlsruhe in 1860, Cannizzaro presented his ideas with little effect.
Fortunately, a paper of his was distributed to those in attendance, and Lothar Meyer included its ideas in his influential text of 1864, which developed theoretical chemistry on the basis of Cannizzaro's propositions.
chemistry.mtu.edu /~pcharles/SCIHISTORY/Stanislao_Cannizzaro.html   (85 words)

  
 JCE 1996 (73) A178 [Aug] Lettere a Stanislao Cannizzaro 1868-1872; Stanislao Cannizzaro: Scritti di Storia Politica e ...   (Site not responding. Last check: 2007-11-07)
For a discussion of Cannizzaro and his scientific and political career as well as a review of the first two volumes (letters from 1857-1868) see Kauffman, G. Chem.
The first chapter of the third volume (42 pp) gives a summary of Cannizzaro's life and pertinent events during the period 1868-1872, the years of his later tenure at the Universitˆ di Palermo and his move to the Universitˆ di Roma.
Chapter 2 (99 pp) presents four of Cannizzaro's discourses on atomic theory--the first of the eight lectures of his famous Sunto (1858); Faraday lecture (London, 1872); lecture to the XII Congresso degli Scienziati Italiani (Palermo, 1875); and Copley Medal address (Rome, 1891).
jchemed.chem.wisc.edu:8000 /journal/Issues/1996/Aug/absA178_6.html   (370 words)

  
 Cannizzaro Family Crest
In continental Europe, the most ancient recorded family crest was discovered upon the monumental effigy of a Count of Wasserburg in the church of St. Emeran, at Ratisobon, Germany...
In the Cannizzaro coat of arms as in all coat of arms the crest is only one element of the full armorial achievement.
Heraldry is defined as the hereditary art or science of blazoning, the description is appropriate technical terms of Coats-of-Arms and other heraldic and armorial insignia, and is of very ancient origin...
www.houseofnames.com /xq/asp.fc/qx/cannizzaro-family-crest.htm   (458 words)

  
 Stanislao Cannizzaro --  Encyclopædia Britannica
Italian chemist, teacher, and legislator who recognized the distinction between atomic and molecular weights and also discovered the Cannizzaro reaction.
More results on "Stanislao Cannizzaro" when you join.
Review by Stanislao G. Pugliese of Luisa Passerini's Autobiography of a Generation (1996), published by H-Italy in April 1997.
www.britannica.com /eb/article-9020012   (373 words)

  
 CANNIZZARO - LoveToKnow Article on CANNIZZARO   (Site not responding. Last check: 2007-11-07)
benzaldehyde into benzoic acid and ben.zyl alcohol (Cannizzaros reaction).
Cannizzaros scientific eminence in 1871 secured him admission.
To properly cite this CANNIZZARO article in your work, copy the complete reference below:
www.1911encyclopedia.org /C/CA/CANNIZZARO.htm   (340 words)

  
 STANISLAO CANNIZZARO   (Site not responding. Last check: 2007-11-07)
Químico italiano, Stanislao Cannizzaro nasceu em Palermo, a 13 de julho de 1826, e faleceu em Roma, a 10 de maio de 1910.
Cannizzaro estabeleceu a distinção entre peso atômico e peso molecular e demonstrou que é possível deduzir os pesos atômicos dos elementos a partir dos pesos moleculares dos seus compostos.
Apesar das prevenções muito enraizadas, as teorias de Cannizzaro despertaram a atenção do mundo científico e, a partir de 1870, foram universalmente consagradas.
allchemy.iq.usp.br /metabolizando/beta/01/cannizza.htm   (344 words)

  
 Stanislao Cannizzaro
Una insegnante del Cannizzaro ci mostra alcune fasi di studio ritmico con i palloni di pallavolo
Il 6 marzo è uscita sul giornale "IL TEMPO" di Roma una intera pagina redatta dagli studenti del Cannizzaro che tende a dare una immagine della loro generazione.
Il Cannizzaro, insieme ad altri istituti risulta assegnatario di un finanziamento di lire 40 milioni per l’allestimento di un Laboratorio Musicale nell’ambito del Progetto Speciale Musica finalizzato alla diffusione della musica come fatto educativo nel sistema scolastico.
www.itiscannizzaro.net /index4.htm   (921 words)

  
 Cannizzaro, Stanislao
Cannizzaro was professor of physics and chemistry in Alessandria (1851), he was later professor of chemistry in Genua (1855), Palermo, (1861) and Rome (1871).
He conducted research on natural compounds like santonin, the synthesis of cyanamide and the disproportionation of aldehydes (Cannizarro´s reaction, 1853).
Italian chemist and ardent nationalist who successfully lobbied for the acceptance of Avogadro's Hypothesis at the Karlsruhe Conference of 1860, which had been called to resolve current problems in chemistry and was attended by 140 of the greatest chemists in Europe.
www.euchems.org /Distinguished/19thCentury/cannizzaro.asp   (115 words)

  
 Stanislao Cannizzaro
benzaldehyde into benzoic acid and benzyl alcohol ("Cannizzaro's reaction").
In the autumn of 1855 he became professor of chemistry at the University of Geneva, and six years later, after declining professorships at Pisa and Naples, accepted the chair of inorganic and organic chemistry at Palermo.
Cannizzaro's scientific eminence in 1871 secured him admission to the Italian senate, of which he was vice-president, and as a member of the Council of Public Instruction and in other ways he rendered important services to the cause of scientific education in Italy.
www.nndb.com /people/370/000095085   (310 words)

  
 AllRefer.com - Stanislao Cannizzaro (Chemistry, Biography) - Encyclopedia
You are here : AllRefer.com > Reference > Encyclopedia > Chemistry, Biographies > Stanislao Cannizzaro
Stanislao Cannizzaro[stAnEslA´O kAn-nEt-tsA´rO] Pronunciation Key, 1826–1910, Italian chemist.
He is known for his discovery of cyanamide, for obtaining alcohols from aldehydes by Cannizzaro's reaction (in which benzaldehyde is converted to benzoic acid and benzyl alcohol, in the presence of a strong alkali), and for distinguishing between molecular and atomic weights.
reference.allrefer.com /encyclopedia/C/Cannizza.html   (188 words)

  
 AIP International Catalog of Sources   (Site not responding. Last check: 2007-11-07)
Cannizzaro was a chemist and a prominent Italian statesman of science.
This material was collected on the occasion of the 100th anniversary of Cannizzaro's birth.
Collection includes correspondence partly published in: Stanislao Cannizzaro.
www.aip.org /history/catalog/3025.html   (93 words)

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