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1 Dienstbereitschaft
f1. obligingness* * *Dienst|be|reit|schaftf1)Díénstbereitschaft haben (Arzt) — to be on call; (Mitarbeiter) to be on duty
in Díénstbereitschaft sein (Apotheke) — to be open
welche Apotheke hat dieses Wochenende Díénstbereitschaft? — which chemist (Brit) or pharmacy is open this weekend?
2) (= Hilfsbereitschaft) helpfulness, willingness to be of service* * *Dienst·be·reit·schaftf1. (Abrufbereitschaft) standby duty\Dienstbereitschaft haben to be on callwelche Apotheke hat dieses Wochenende \Dienstbereitschaft? which is the emergency pharmacy this weekend?, which pharmacy is open after hours this weekend?2. (Bereitschaft zur Hilfe) willingness to help, helpfulness* * *1. obligingness2. standby duty; -
2 Notdienst
* * *Not|dienstmNótdienst haben (Apotheke) — to be open 24 hours; (Arzt, Elektriker etc) to be on call
* * *Not·dienstm dutywelche Apotheke/welcher Arzt hat am Wochenende \Notdienst? which chemist's/doctor is on duty at the weekend?in der Samstagsausgabe stehen Angaben zum ärztlichen \Notdienst fürs Wochenende the Saturday issue gives details of which doctors are on call at the weekend* * *der s. Bereitschaftsdienst* * *Notdienst m standby duty;* * * -
3 Notdienst
Not·dienst mduty;welche Apotheke/welcher Arzt hat am Wochenende \Notdienst? which chemist's/doctor is on duty at the weekend?;in der Samstagsausgabe stehen Angaben zum ärztlichen \Notdienst fürs Wochenende the Saturday issue gives details of which doctors are on call at the weekend -
4 turno sm
['turno](volta) turn, (di lavoro) shiftessere di turno — (soldato, medico, custode) to be on duty
qual è la farmacia di turno domenica? — which chemist Brit o drugstore Am will be open on Sunday?
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5 turno
sm ['turno](volta) turn, (di lavoro) shiftessere di turno — (soldato, medico, custode) to be on duty
qual è la farmacia di turno domenica? — which chemist Brit o drugstore Am will be open on Sunday?
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6 Glauber, Johann Rudolf
SUBJECT AREA: Metallurgy[br]b. 1604 Karlstadt, Germanyd. March 1670 Amsterdam, Holland[br]German chemist and metallurgist.[br]The son of a barber, Glauber took up the study of alchemy and travelled widely in search of its secrets. Around 1639, the political uncertainties of the Thirty Years War persuaded him to leave Germany for a more settled life in Amsterdam. While there, he carried out most of the practical work for which he is famous, including his distillation furnace, which made it possible to reach higher temperatures and to heat substances in a variety of conditions. To earn a living he set up in the wine trade, but he continued his alchemical pursuits, under cover on account of the unpopularity of the would-be gold makers. After the end of the war, he returned to Germany, but in 1655 personal disputes and religious friction drove him back to Amsterdam. He set about constructing the largest and most elaborate chemical laboratory in Europe.Glauber's best-known writing, the Furni novi philosophici (1646–9) gives the clearest idea of his practical methods and was influential on some of the leading chemists of the time and later. His name survives today in Glauber's salt for hydrated sodium sulphate. Glauber described several methods for preparing the mineral acids, materials of great importance to the chemist, and obtained the concentrated acids by using his distilling furnace. He tried distilling any substance he could lay hands on, and in the course of this work became probably the first chemist to distil coal and, using hydrochloric acid, obtain benzene and phenol. Glauber was the best practical chemist of the age and the first industrial chemist.[br]Bibliography1646–9, Furni novi philosophiciFurther ReadingK.F.Gugel, 1955, Johann Rudolf Glauber (1604–1670), Leben und Werke, Würzburg (the fullest account of his life; with a bibliography).P.Walden, 1929, "Glauber", in Das Buch der grossen Chemiker, ed. G.Bugge, Berlin, pp. 151–72 (the best account of Glauber's practical methods).E.Farber, 1961, Great Chemists, New York, pp. 115–31 (an abridged translation of ibid.).LRD -
7 Mond, Ludwig
SUBJECT AREA: Chemical technology[br]b. 7 March 1839 Cassel, Germanyd. 11 December 1909 London, England[br]German (naturalized English) industrial chemist.[br]Born into a prosperous Jewish merchant family, Mond studied at the Polytechnic in Cassel and then under the distinguished chemists Hermann Kolbe at Marburg and Bunsen at Heidelberg from 1856. In 1859 he began work as an industrial chemist in various works in Germany and Holland. At this time, Mond was pursuing his method for recovering sulphur from the alkali wastes in the Leblanc soda-making process. Mond came to England in 1862 and five years later settled permanently, in partnership with John Hutchinson \& Co. at Widnes, to perfect his process, although complete success eluded him. He became a naturalized British subject in 1880.In 1872 Mond became acquainted with Ernest Solvay, the Belgian chemist who developed the ammonia-soda process which finally supplanted the Leblanc process. Mond negotiated the English patent rights and set up the first ammoniasoda plant in England at Winnington in Cheshire, in partnership with John Brunner. After overcoming many difficulties by incessant hard work, the process became a financial success and in 1881 Brunner, Mond \& Co. was formed, for a time the largest alkali works in the world. In 1926 the company merged with others to form Imperial Chemical Industries Ltd (ICI). The firm was one of the first to adopt the eight-hour day and to provide model dwellings and playing fields for its employees.From 1879 Mond took up the production of ammonia and this led to the Mond producer-gas plant, patented in 1883. The process consisted of passing air and steam over coal and coke at a carefully regulated temperature. Ammonia was generated and, at the same time, so was a cheap and useful producer gas. Mond's major discovery followed the observation in 1889 that carbon monoxide could combine with nickel in its ore at around 60°C to form a gaseous compound, nickel carbonyl. This, on heating to a higher temperature, would then decompose to give pure nickel. Mond followed up this unusual way of producing and purifying a metal and by 1892 had succeeded in setting up a pilot plant to perfect a large-scale process and went on to form the Mond Nickel Company.Apart from being a successful industrialist, Mond was prominent in scientific circles and played a leading role in the setting up of the Society of Chemical Industry in 1881. The success of his operations earned him great wealth, much of which he donated for learned and charitable purposes. He formed a notable collection of pictures which he bequeathed to the National Gallery.[br]Principal Honours and DistinctionsFRS 1891.Bibliography1885, "On the origin of the ammonia-soda process", Journal of the Society of Chemical Industry 4:527–9.1895. "The history of the process of nickel extraction", Journal of the Society of Chemical Industry 14:945–6.Further ReadingJ.M.Cohen, 1956, The Life of Ludwig Mond, London: Methuen. Obituary, 1918, Journal of the Chemical Society 113:318–34.F.C.Donnan, 1939, Ludwig Mond 1839–1909, London (a valuable lecture).LRD -
8 Voelcker, John Christopher
SUBJECT AREA: Agricultural and food technology[br]b. 24 September 1822 Frankfurt am Main, Germanyd. 5 December 1884 England[br]German analytical chemist resident in England whose reports on feedstuffs and fertilizers had a considerable influence on the quality of these products.[br]The son of a merchant in the city of his birth, John Christopher had delicate health and required private tuition to overcome the loss of his early years of schooling. At the age of 22 he went to study chemistry at Göttingen University and then worked for a short time for Liebig at Giessen. In 1847 he obtained a post as Analyst and Consulting Chemist at the Agricultural Chemistry Association of Scotland's Edinburgh office, and two years later he became Professor of Chemistry at the Royal Agricultural College in Cirencester, retaining this post until 1862. In 1855 he was appointed Chemist to the Bath and West Agricultural Society, and in that capacity organized lectures and field trials, and in 1857 he also became Consulting Chemist to the Royal Agricultural Society of England. Initially he studied the properties of farmyard manure and also the capacity of the soil to absorb ammonia, potash and sodium. As Consulting Chemist to farmers he analysed feedstuffs and manures; his assessments of artificial manures did much to force improvements in standards. During the 1860s he worked on milk and dairy products. He published the results of his work each year in the Journal of the Royal Agricultural Society of England. In 1877 he became involved in the field trials initiated and funded by the Duke of Bedford on his Woburn farm, and he continued his association with this venture until his death.[br]Principal Honours and DistinctionsFRS. Founder and Vice-President, Institute of Chemistry of Great Britain and Northern Ireland 1877. Member Chemical Society 1849; he was a member of Council as well as its Vice-President at the time of his death. Member of the Board of Studies, Royal Agricultural College, Cirencester; Honorary Professor from 1882.BibliographyHis papers are to be found in the Journal of the Royal Agricultural Society of England, for which he began to write reports in 1855, and also in the Journal of the Bath and West Society.Further ReadingJ.H.Gilbert, 1844, obituary, Journal of the Royal Agricultural Society of England, pp. 308–21 (a detailed account).Sir E.John Russell, A History of Agricultural Science in Great Britain.See also: Voelcker, John AugustusAPBiographical history of technology > Voelcker, John Christopher
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9 vender
v.1 to sell, to vend.vender algo a o por to sell something forvenden naranjas a 2 euros el kilo they're selling oranges for 2 euros a kiloes capaz de vender a su madre he'd sell his own motheres capaz de vender su alma al diablo por triunfar he'd sell his soul to the Devil if that's what it took to be successfulEllos venden verduras They sell vegetables.Ellos vendieron la casa They sold the house.2 to expose for sale.3 to soil, to betray for money, to prostitute.El chico vendió a su mejor amigo The boy betrayed his best friend.4 to persuade, to delude with false pretences.5 to betray faith, confidence, or friendship. (Metaphorical)6 to boast of talents or merits one does not possess.7 to devote oneself to the service of another.* * *1 (gen) to sell2 figurado (traicionar) to betray1 (uso impersonal) to be on sale, be sold2 (dejarse sobornar) to sell oneself\'Se vende' "For sale"sin vender unsoldvender a plazos to sell on creditvender al contado to sell for cashvender al por mayor to sell wholesale, wholesalevender al por menor to sell retail, retailvender caro to sell at a high pricevenderse caro,-a to play hard to get* * *verb* * *1. VT1) [+ producto] to sellvenderle algo a algn — to sell sb sth, sell sth to sb
2) (=traicionar) [+ amigo] to betray, sell out *; [+ cómplice] to shop *2.VI to sell3.See:* * *1.verbo transitivo1) <mercancías/casa> to sellse vende muy bien/poco — it sells very well/doesn't sell very well
vender al por mayor/menor — to sell wholesale/retail
lo venden a $500 el kilo — they sell it at $500 a kilo
vender algo en or por algo — to sell something for something
vendí el cuadro en or por $20.000 — I sold the painting for $20,000
vender algo por algo: se vende por kilo(s)/unidad(es) — it's sold by the kilo/unit
2)a) ( traicionar) to betrayb) ( delatar) to give... away2. 3.venderse v pron to sell out* * *= market, sell, flog, dispose of, peddle.Ex. In information retrieval applications it was more usual for one organisation to carry most of the burden of development of the system, and then to market it to others.Ex. Since a software package is to be sold it must be visible on the marketplace.Ex. Shops which keep on selling cigarettes to children under 16 will be banned from flogging tobacco.Ex. List and describe the steps involved in withdrawing and disposing of books which are no longer required.Ex. It could lose those shareholders who may not want to be associated with a conglomerate which also peddles death and destruction.----* arte de vender = salesmanship, specsmanship.* con licencia para vender bebidas alcohólicas = licensed.* no vendas la leche antes de ordeñar la vaca = don't count your chickens before they are hatched.* que se vende = priced.* tienda que vende de todo = general store.* vender a Alguien como esclavo = sell + Nombre + into slavery.* vender a crédito = make + charge sale.* vender a cuenta = trade for + credit.* vender al contado = trade for + cash.* vender al detalle = retail.* vender al por mayor = sell + in bulk, wholesale.* vender al por menor = retail.* vender a precio de costo = sell at + cost.* vender a precio de ganga = sell at + bargain price.* vender a un precio más barato que = undercut.* vender de casa en casa = peddle.* vender el alma al diablo = sell + Posesivo + soul to the devil.* vender en el extranjero a precios inferiores que en el país de origen = dump.* vender la moto a Alguien = pull + the wool over + Posesivo + eyes.* vender más barato = undercut.* venderse = change + hands.* venderse caro = play + hard to get, play it + cool.* venderse más que = outsell.* venderse por + Dinero = fetch + Dinero.* vender todas las entradas de un Evento = sell out.* vender un producto = carry.* vender un servicio = market + service.* * *1.verbo transitivo1) <mercancías/casa> to sellse vende muy bien/poco — it sells very well/doesn't sell very well
vender al por mayor/menor — to sell wholesale/retail
lo venden a $500 el kilo — they sell it at $500 a kilo
vender algo en or por algo — to sell something for something
vendí el cuadro en or por $20.000 — I sold the painting for $20,000
vender algo por algo: se vende por kilo(s)/unidad(es) — it's sold by the kilo/unit
2)a) ( traicionar) to betrayb) ( delatar) to give... away2. 3.venderse v pron to sell out* * *= market, sell, flog, dispose of, peddle.Ex: In information retrieval applications it was more usual for one organisation to carry most of the burden of development of the system, and then to market it to others.
Ex: Since a software package is to be sold it must be visible on the marketplace.Ex: Shops which keep on selling cigarettes to children under 16 will be banned from flogging tobacco.Ex: List and describe the steps involved in withdrawing and disposing of books which are no longer required.Ex: It could lose those shareholders who may not want to be associated with a conglomerate which also peddles death and destruction.* arte de vender = salesmanship, specsmanship.* con licencia para vender bebidas alcohólicas = licensed.* no vendas la leche antes de ordeñar la vaca = don't count your chickens before they are hatched.* que se vende = priced.* tienda que vende de todo = general store.* vender a Alguien como esclavo = sell + Nombre + into slavery.* vender a crédito = make + charge sale.* vender a cuenta = trade for + credit.* vender al contado = trade for + cash.* vender al detalle = retail.* vender al por mayor = sell + in bulk, wholesale.* vender al por menor = retail.* vender a precio de costo = sell at + cost.* vender a precio de ganga = sell at + bargain price.* vender a un precio más barato que = undercut.* vender de casa en casa = peddle.* vender el alma al diablo = sell + Posesivo + soul to the devil.* vender en el extranjero a precios inferiores que en el país de origen = dump.* vender la moto a Alguien = pull + the wool over + Posesivo + eyes.* vender más barato = undercut.* venderse = change + hands.* venderse caro = play + hard to get, play it + cool.* venderse más que = outsell.* venderse por + Dinero = fetch + Dinero.* vender todas las entradas de un Evento = sell out.* vender un producto = carry.* vender un servicio = market + service.* * *vender [E1 ]vtA ‹mercancías/acciones/casa› to selltrabaja vendiendo libros she sells books for a livinglo venden en todos lados it's on sale everywherevendió la casa muy bien she got a very good price for her housele vendí el reloj a mi primo I sold my cousin the watch, I sold the watch to my cousinesa línea se vende muy bien/poco that line sells very well/doesn't sell very well[ S ] se vende for sale[ S ] se vende bicicleta señora lady's bicycle for salevender al por mayor/menor to sell wholesale/retailes capaz de vender a su padre/madre con tal de conseguirlo she would sell her own father/mother to get itintentando vender una imagen moderna del país trying to sell a more modern image of the countryvender algo A algo to sell sth AT sthlo venden a $500 el kilo they sell it at $500 a kilo, it sells for $500 a kilovender algo EN or POR algo to sell sth FOR sthvendí el cuadro en or por $20.000 I sold the painting for $20,000se vende por kilo/unidad it's sold by the kilo/unitvenderse como churros or pan caliente or rosquillas ( fam); to sell like hotcakesel libro se vende como pan caliente the book is selling like hotcakesB1 (traicionar) ‹amigo› to betray, sell … down the river ( colloq)2 (delatar) ‹persona› to give … awayel acento lo vende his accent gives him away■ vendervi1 «producto» to sell2 «pintor» to be successful; «actor/jugador» to be successful, be a crowdpulleruna escritora que vende a best-selling author■ venderseto sell outse vendió por un ascenso he abandoned all his principles o sold out to get promotionse ha vendido a los intereses extranjeros he has sold out to foreign interests* * *
vender ( conjugate vender) verbo transitivo ‹mercancías/casa› to sell;
vendió la casa muy bien she got a very good price for her house;
( on signs) se vende for sale;◊ lo venden a $500 el kilo they sell it at $500 a kilo;
vendí el cuadro en or por $20.000 I sold the painting for $20,000;
se vende por kilo(s)/unidades it's sold by the kilo/unit
verbo intransitivo [ producto] to sell
venderse verbo pronominal ( dejarse sobornar) to sell out
vender verbo transitivo
1 (un objeto) to sell
vender al por mayor/menor, to (sell) wholesale/retail
2 (traicionar a una persona) to sell out, betray
' vender' also found in these entries:
Spanish:
acuerdo
- fiar
- subastar
- caro
- financiar
- granel
- huevo
- metro
- regalar
- rematar
- traspasar
English:
dispose of
- do
- flog
- good
- inexpensively
- outsell
- peddle
- pitch
- retail
- sell
- sell off
- stitch up
- stock
- the
- tout
- carry
- hustle
- licensed
- patter
- profit
- under
* * *♦ vt1. [productos] to sell;venden naranjas a 20 pesos el kilo they're selling oranges for 20 pesos a kilo;se vende [en letrero] for sale;este modelo se vende mucho this model is selling very well;es capaz de vender a su madre he'd sell his own mother;vender su alma al diablo: es capaz de vender su alma al diablo por triunfar he'd sell his soul to the Devil if that's what it took to be successful;vender caro algo not to give sth up without a fight;el equipo vendió caro su título the team did not give up its title without a fight;la oposición venderá caro su apoyo the opposition will demand a high price for its support;no vender ni una escoba to get absolutely nowhere;Famvender la moto a alguien: les vendió la moto de que iban a ser estrellas he fooled them into believing they were going to be stars;nos quieren vender la moto de que no van a subir los impuestos they want us to swallow the story that they're not going to increase taxes;RPvender salud to be bursting with health2. [idea, proyecto] to sell3. [amigo, familia] to betray♦ vi[producto, autor] to sell;eso no vende hoy día that doesn't sell these days* * *v/t1 sell;vender caro algo a alguien fig make s.o. pay dearly for sth2 fig ( traicionar) betray* * *vender vt1) : to sell2) : to sell out, to betray* * *"se vende" "for sale" -
10 Davy, Sir Humphry
[br]b. 17 December 1778 Penzance, Cornwall, Englandd. 29 May 1829 Geneva, Switzerland[br]English chemist, discoverer of the alkali and alkaline earth metals and the halogens, inventor of the miner's safety lamp.[br]Educated at the Latin School at Penzance and from 1792 at Truro Grammar School, Davy was apprenticed to a surgeon in Penzance. In 1797 he began to teach himself chemistry by reading, among other works, Lavoisier's elementary treatise on chemistry. In 1798 Dr Thomas Beddoes of Bristol engaged him as assistant in setting up his Pneumatic Institution to pioneer the medical application of the newly discovered gases, especially oxygen.In 1799 he discovered the anaesthetic properties of nitrous oxide, discovered not long before by the chemist Joseph Priestley. He also noted its intoxicating qualities, on account of which it was dubbed "laughing-gas". Two years later Count Rumford, founder of the Royal Institution in 1800, appointed Davy Assistant Lecturer, and the following year Professor. His lecturing ability soon began to attract large audiences, making science both popular and fashionable.Davy was stimulated by Volta's invention of the voltaic pile, or electric battery, to construct one for himself in 1800. That enabled him to embark on the researches into electrochemistry by which is chiefly known. In 1807 he tried decomposing caustic soda and caustic potash, hitherto regarded as elements, by electrolysis and obtained the metals sodium and potassium. He went on to discover the metals barium, strontium, calcium and magnesium by the same means. Next, he turned his attention to chlorine, which was then regarded as an oxide in accordance with Lavoisier's theory that oxygen was the essential component of acids; Davy failed to decompose it, however, even with the aid of electricity and concluded that it was an element, thus disproving Lavoisier's view of the nature of acids. In 1812 Davy published his Elements of Chemical Philosophy, in which he presented his chemical ideas without, however, committing himself to the atomic theory, recently advanced by John Dalton.In 1813 Davy engaged Faraday as Assistant, perhaps his greatest service to science. In April 1815 Davy was asked to assist in the development of a miner's lamp which could be safely used in a firedamp (methane) laden atmosphere. The "Davy lamp", which emerged in January 1816, had its flame completely surrounded by a fine wire mesh; George Stephenson's lamp, based on a similar principle, had been introduced into the Northumberland pits several months earlier, and a bitter controversy as to priority of invention ensued, but it was Davy who was awarded the prize for inventing a successful safety lamp.In 1824 Davy was the first to suggest the possibility of conferring cathodic protection to the copper bottoms of naval vessels by the use of sacrificial electrodes. Zinc and iron were found to be equally effective in inhibiting corrosion, although the scheme was later abandoned when it was found that ships protected in this way were rapidly fouled by weeds and barnacles.[br]Principal Honours and DistinctionsKnighted 1812. FRS 1803; President, Royal Society 1820. Royal Society Copley Medal 1805.Bibliography1812, Elements of Chemical Philosophy.1839–40, The Collected Works of Sir Humphry Davy, 9 vols, ed. John Davy, London.Further ReadingJ.Davy, 1836, Memoirs of the Life of Sir Humphry Davy, London (a classic biography). J.A.Paris, 1831, The Life of Sir Humphry Davy, London (a classic biography). H.Hartley, 1967, Humphry Davy, London (a more recent biography).J.Z.Fullmer, 1969, Cambridge, Mass, (a bibliography of Davy's works).ASD -
11 Pasteur, Louis
[br]b. 27 December 1822 Dole, Franced. 28 September 1895 Paris, France[br]French chemist, founder of stereochemistry, developer of microbiology and immunology, and exponent of the germ theory of disease.[br]Sustained by the family tanning business in Dole, near the Swiss border, Pasteur's school career was undistinguished, sufficing to gain him entry into the teacher-training college in Paris, the Ecole Normale, There the chemical lectures by the great organic chemist J.B.A.Dumas (1800–84) fired Pasteur's enthusiasm for chemistry which never left him. Pasteur's first research, carried out at the Ecole, was into tartaric acid and resulted in the discovery of its two optically active forms resulting from dissymmetrical forms of their molecules. This led to the development of stereochemistry. Next, an interest in alcoholic fermentation, first as Professor of Chemistry at Lille University in 1854 and then back at the Ecole from 1857, led him to deny the possibility of spontaneous generation of animal life. Doubt had previously been cast on this, but it was Pasteur's classic research that finally established that the putrefaction of broth or the fermentation of sugar could not occur spontaneously in sterile conditions, and could only be caused by airborne micro-organisms. As a result, he introduced pasteurization or brief, moderate heating to kill pathogens in milk, wine and other foods. The suppuration of wounds was regarded as a similar process, leading Lister to apply Pasteur's principles to revolutionize surgery. In 1860, Pasteur himself decided to turn to medical research. His first study again had important industrial implications, for the silk industry was badly affected by diseases of the silkworm. After prolonged and careful investigation, Pasteur found ways of dealing with the two main infections. In 1868, however, he had a stroke, which prevented him from active carrying out experimentation and restricted him to directing research, which actually was more congenial to him. Success with disease in larger animals came slowly. In 1879 he observed that a chicken treated with a weakened culture of chicken-cholera bacillus would not develop symptoms of the disease when treated with an active culture. He compared this result with Jenner's vaccination against smallpox and decided to search for a vaccine against the cattle disease anthrax. In May 1881 he staged a demonstration which clearly showed the success of his new vaccine. Pasteur's next success, finding a vaccine which could protect against and treat rabies, made him world famous, especially after a person was cured in 1885. In recognition of his work, the Pasteur Institute was set up in Paris by public subscription and opened in 1888. Pasteur's genius transcended the boundaries between science, medicine and technology, and his achievements have had significant consequences for all three fields.[br]BibliographyPasteur published over 500 books, monographs and scientific papers, reproduced in the magnificent Oeuvres de Pasteur, 1922–39, ed. Pasteur Vallery-Radot, 7 vols, Paris.Further ReadingP.Vallery-Radot, 1900, La vie de Louis Pasteur, Paris: Hachette; 1958, Louis Pasteur. A Great Life in Brief, English trans., New York (the standard biography).E.Duclaux, 1896, Pasteur: Histoire d ' un esprit, Paris; 1920, English trans., Philadelphia (perceptive on the development of Pasteur's thought in relation to contemporary science).R.Dobos, 1950, Louis Pasteur, Free Lance of Science, Boston, Mass.; 1955, French trans.LRD -
12 Garde
I.garde1 [gaʀd]1. feminine nouna. ( = surveillance) confier qch/qn à la garde de qn to entrust sth/sb to sb's cared. ( = groupe, escorte) guard• garde rapprochée [de président] personal bodyguarde. ( = infirmière) nurse• garde de jour/de nuit day/night nursef. (Boxing, fencing) guard• en garde ! on guard!h. (locutions)► en garde• prendre garde de or à ne pas faire qch to be careful not to do sth• être/se tenir sur ses gardes to be/stay on one's guard2. compounds► garde à vue ≈ police custody• être mis or placé en garde à vue ≈ to be kept in police custodyII.garde2 [gaʀd]masculine noun[de locaux, prisonnier] guard ; [de domaine, château] warden (Brit), keeper (US) ; [de jardin public] keeper* * *
I gaʀdnom masculin1) (soldat, policier) guard•Phrasal Verbs:
II gaʀd1) ( infirmière) nurse2) ( groupe) guard3) (surveillance, protection)monter la garde — [soldat] to mount guard
monter la garde auprès de — to keep watch over [prisonnier, malade]; to stand guard over [enfant, homme politique]
mettre sous bonne garde — to put [somebody] under guard [suspect, prisonnier]
être sous la garde de quelqu'un — [prisonnier] to be guarded by somebody; [enfant, objet de valeur] to be looked after by somebody; Droit to be in somebody's custody
4) ( service)être de garde — [médecin] to be on call; [soldat, sentinelle] to be on guard duty
pharmacie de garde — duty chemist's GB, emergency drugstore US
5) ( position de défense) guard, on-guard positionprendre garde — ( se méfier) to watch out (à for); ( se soucier) to be careful ( de faire to do)
n'avoir garde de faire — fml to be careful not to do
6) ( d'épée) hilt7) (de livre, cahier)•Phrasal Verbs:* * *ɡaʀd1. nm/f1) (= personne) [prisonnier] guard2) [domaine, parc] warden3) (= soldat, sentinelle) guard2. nf1) [captifs] guardingIl est chargé de la garde des prisonniers. — He's responsible for guarding the prisoners.
2) [surveillance, guet] (action) guard3) (= faction) watchJ'ai la prochaine garde. — I've got the next watch.
4) [enfants, personnes âgées] careIls cherchent quelqu'un pour la garde des enfants. — They're looking for someone to look after the children.
5) (= soldats) guard6) BOXE, ESCRIME guard7) [arme] hiltPrenez garde au verglas. — Watch out for black ice.
Elle m'a mis en garde contre les pickpockets. — She warned me about pickpockets.
de garde (pharmacie) — duty modif (médecin) on call
La pharmacie de garde ce week-end est... — The duty chemist this weekend is...
Le médecin de garde était en état d'ivresse. — The doctor on call was inebriated.
être de garde [pharmacien] — to be open, [médecin] to be on call, [soldat] to be on guard duty
* * *A nm1 (soldat, policier) guard;B nf1 ( infirmière) nurse;3 (surveillance, protection) monter la garde [soldat] to mount guard; monter la garde auprès de to keep watch over [prisonnier, malade]; to stand guard over [enfant, homme politique]; placer/mettre qn sous bonne garde to put sb under guard [suspect, prisonnier]; être sous la garde de qn [prisonnier] to be guarded by sb; [enfant, objet de valeur] to be looked after by sb; Jur to be in sb's custody; elle a obtenu la garde de ses enfants Jur she was granted custody of her children; laisser qch/un animal en garde chez qn to leave sth/an animal to be looked after by sb; confier qch/qn à la garde de X to leave X to look after sth/sb; assurer la garde d'une villa to be in charge of the security of a villa;4 ( continuité de service) être de garde [docteur, infirmière] to be on call; [soldat, sentinelle] to be on guard duty; la pharmacie de garde the duty chemist's GB, the emergency drugstore US;5 Sport ( position de défense) guard, on-guard position; en garde! on guard!; il a une excellente garde he has an excellent on-guard position; se mettre en garde to square up; baisser sa garde lit, fig to lower one's guard; être/se tenir sur ses gardes to be/to remain on one's guard; mettre qn en garde to warn sb (à propos de about; contre against); mise en garde warning; prendre garde ( se méfier) to watch out (à for); ( se soucier) to be careful (de faire to do); sans y prendre garde inadvertently; n'avoir garde de faire fml to be careful not to do;7 Édition (page de) garde endpaper.garde champêtre ≈ local policeman (appointed by the municipality); garde du corps bodyguard; garde du courrier Postes postal service offering mail storage at the delivery office in one's absence; garde descendante Mil outgoing guard; garde d'enfant childminder GB, day-care lady US; garde forestier forest warden, forest ranger; garde d'honneur guard of honourGB; garde impérial Hist soldier of the Imperial Guard; garde impériale Hist Imperial Guard; garde montante Mil new guard, relieving guard; garde pontifical member of the papal guard; garde pontificale papal guard; garde républicain member of the Republican Guard; garde républicaine Republican Guard; garde rouge Red Guard; garde des Sceaux French Minister of Justice; garde au sol Aut road clearance; garde suisse Swiss Guard; garde à vue Jur ≈ police custody; placer qn en garde à vue to hold sb for questioning.ⓘ Garde à vue The process of police detention during which a person can be held for questioning for up to 48 hours without a warrant.ⓘ Garde républicaine A section of the Gendarmerie nationale, with special ceremonial, security and escort duties in connection with prestigious occasions or institutions.[gard] nom propre→ link=lac lac -
13 garde
I.garde1 [gaʀd]1. feminine nouna. ( = surveillance) confier qch/qn à la garde de qn to entrust sth/sb to sb's cared. ( = groupe, escorte) guard• garde rapprochée [de président] personal bodyguarde. ( = infirmière) nurse• garde de jour/de nuit day/night nursef. (Boxing, fencing) guard• en garde ! on guard!h. (locutions)► en garde• prendre garde de or à ne pas faire qch to be careful not to do sth• être/se tenir sur ses gardes to be/stay on one's guard2. compounds► garde à vue ≈ police custody• être mis or placé en garde à vue ≈ to be kept in police custodyII.garde2 [gaʀd]masculine noun[de locaux, prisonnier] guard ; [de domaine, château] warden (Brit), keeper (US) ; [de jardin public] keeper* * *
I gaʀdnom masculin1) (soldat, policier) guard•Phrasal Verbs:
II gaʀd1) ( infirmière) nurse2) ( groupe) guard3) (surveillance, protection)monter la garde — [soldat] to mount guard
monter la garde auprès de — to keep watch over [prisonnier, malade]; to stand guard over [enfant, homme politique]
mettre sous bonne garde — to put [somebody] under guard [suspect, prisonnier]
être sous la garde de quelqu'un — [prisonnier] to be guarded by somebody; [enfant, objet de valeur] to be looked after by somebody; Droit to be in somebody's custody
4) ( service)être de garde — [médecin] to be on call; [soldat, sentinelle] to be on guard duty
pharmacie de garde — duty chemist's GB, emergency drugstore US
5) ( position de défense) guard, on-guard positionprendre garde — ( se méfier) to watch out (à for); ( se soucier) to be careful ( de faire to do)
n'avoir garde de faire — fml to be careful not to do
6) ( d'épée) hilt7) (de livre, cahier)•Phrasal Verbs:* * *ɡaʀd1. nm/f1) (= personne) [prisonnier] guard2) [domaine, parc] warden3) (= soldat, sentinelle) guard2. nf1) [captifs] guardingIl est chargé de la garde des prisonniers. — He's responsible for guarding the prisoners.
2) [surveillance, guet] (action) guard3) (= faction) watchJ'ai la prochaine garde. — I've got the next watch.
4) [enfants, personnes âgées] careIls cherchent quelqu'un pour la garde des enfants. — They're looking for someone to look after the children.
5) (= soldats) guard6) BOXE, ESCRIME guard7) [arme] hiltPrenez garde au verglas. — Watch out for black ice.
Elle m'a mis en garde contre les pickpockets. — She warned me about pickpockets.
de garde (pharmacie) — duty modif (médecin) on call
La pharmacie de garde ce week-end est... — The duty chemist this weekend is...
Le médecin de garde était en état d'ivresse. — The doctor on call was inebriated.
être de garde [pharmacien] — to be open, [médecin] to be on call, [soldat] to be on guard duty
* * *A nm1 (soldat, policier) guard;B nf1 ( infirmière) nurse;3 (surveillance, protection) monter la garde [soldat] to mount guard; monter la garde auprès de to keep watch over [prisonnier, malade]; to stand guard over [enfant, homme politique]; placer/mettre qn sous bonne garde to put sb under guard [suspect, prisonnier]; être sous la garde de qn [prisonnier] to be guarded by sb; [enfant, objet de valeur] to be looked after by sb; Jur to be in sb's custody; elle a obtenu la garde de ses enfants Jur she was granted custody of her children; laisser qch/un animal en garde chez qn to leave sth/an animal to be looked after by sb; confier qch/qn à la garde de X to leave X to look after sth/sb; assurer la garde d'une villa to be in charge of the security of a villa;4 ( continuité de service) être de garde [docteur, infirmière] to be on call; [soldat, sentinelle] to be on guard duty; la pharmacie de garde the duty chemist's GB, the emergency drugstore US;5 Sport ( position de défense) guard, on-guard position; en garde! on guard!; il a une excellente garde he has an excellent on-guard position; se mettre en garde to square up; baisser sa garde lit, fig to lower one's guard; être/se tenir sur ses gardes to be/to remain on one's guard; mettre qn en garde to warn sb (à propos de about; contre against); mise en garde warning; prendre garde ( se méfier) to watch out (à for); ( se soucier) to be careful (de faire to do); sans y prendre garde inadvertently; n'avoir garde de faire fml to be careful not to do;7 Édition (page de) garde endpaper.garde champêtre ≈ local policeman (appointed by the municipality); garde du corps bodyguard; garde du courrier Postes postal service offering mail storage at the delivery office in one's absence; garde descendante Mil outgoing guard; garde d'enfant childminder GB, day-care lady US; garde forestier forest warden, forest ranger; garde d'honneur guard of honourGB; garde impérial Hist soldier of the Imperial Guard; garde impériale Hist Imperial Guard; garde montante Mil new guard, relieving guard; garde pontifical member of the papal guard; garde pontificale papal guard; garde républicain member of the Republican Guard; garde républicaine Republican Guard; garde rouge Red Guard; garde des Sceaux French Minister of Justice; garde au sol Aut road clearance; garde suisse Swiss Guard; garde à vue Jur ≈ police custody; placer qn en garde à vue to hold sb for questioning.ⓘ Garde à vue The process of police detention during which a person can be held for questioning for up to 48 hours without a warrant.ⓘ Garde républicaine A section of the Gendarmerie nationale, with special ceremonial, security and escort duties in connection with prestigious occasions or institutions.I[gard] nom fémininA.1. [surveillance - d'un bien, d'un lieu]je te confie la garde du manuscrit I am entrusting you with the manuscript, I am leaving the manuscript in your safekeeping ou carea. [police] to guard a buildingb. [concierge] to look after a building, to be caretaker of a buildingfaire bonne garde: on te prête la maison pour le week-end, mais fais bonne garde we'll let you use our house for the weekend, but look after it carefully2. [protection - d'un enfant, d'un animal] carepuis-je te confier la garde de mon chien pendant deux jours? would you take care of ou look after my dog for two days?3. MÉDECINE [service de surveillance]la garde des enfants fut confiée à la mère the mother was given custody of the children, the children were left in the custody of their motherB.sportn'avoir garde de faire (soutenu) : je n'aurai garde de vous contredire I'll take good care not to contradict youprendre garde de: prenez garde de ne rien oublier make sure ou take care you don't leave anything behindC.1. [escorte, milice] guard2. [soldats en faction] guardgarde montante/descendante relief/old guardD.armement[d'une arme blanche] hilt————————gardes nom féminin plurielêtre/se tenir sur ses gardes to be/to stay on one's guard————————de garde locution adjectivale1. → link=chien chienmédecin de garde duty doctor, doctor on duty————————en garde locution adverbiale1. MILITAIRE & SPORT2. [sous surveillance]4. (locution)je l'avais mise en garde contre les dangers du tabac I had warned her against the dangers of smokingsous bonne garde locution adverbialeII[gard] nom masculin et féminin[personne]la garde des enfants est une jeune Allemande the childminder (UK) ou baby-sitter is a young German girl————————[gard] nom masculin1. [surveillant] warden————————[gard] nom féminin -
14 pasar dificultades
v.to be having troubles, to go through a lot of trouble, to be having a lot of trouble, to go through difficulties.* * *(v.) = struggle, be under strain, bear + hardship, have + a difficult time, experience + difficult times, pass through + difficult times, face + difficult timesEx. The chemist, struggling with the synthesis of an organic compound, has all the chemical literature before him in his laboratory.Ex. Sources of domestic supply of periodicals in the socialist countries are also under strain or have collapsed.Ex. So we see extraordinary hardships cheerfully borne (indeed, apparently enjoyed) by zealous mountaineers, earnest single-handed yachtsmen floating round the world, and all-weather fishing-hobbyists sit patiently at the side of, and sometimes in, rivers, undeterred by the paucity of their catches.Ex. Videotext services have had a notoriously difficult time becoming accepted in the US marketplace.Ex. Consumer publishing is experiencing difficult times and there are specific developments which are influencing the market for children's books.Ex. The author discusses the history of and services offered by the Folger Shakespeare Library which has passed through difficult times and emerged with a new building and a new personality.* * *(v.) = struggle, be under strain, bear + hardship, have + a difficult time, experience + difficult times, pass through + difficult times, face + difficult timesEx: The chemist, struggling with the synthesis of an organic compound, has all the chemical literature before him in his laboratory.
Ex: Sources of domestic supply of periodicals in the socialist countries are also under strain or have collapsed.Ex: So we see extraordinary hardships cheerfully borne (indeed, apparently enjoyed) by zealous mountaineers, earnest single-handed yachtsmen floating round the world, and all-weather fishing-hobbyists sit patiently at the side of, and sometimes in, rivers, undeterred by the paucity of their catches.Ex: Videotext services have had a notoriously difficult time becoming accepted in the US marketplace.Ex: Consumer publishing is experiencing difficult times and there are specific developments which are influencing the market for children's books.Ex: The author discusses the history of and services offered by the Folger Shakespeare Library which has passed through difficult times and emerged with a new building and a new personality.Ex: This may be a reason why the publishing industry is facing such difficult times. -
15 Abel, Sir Frederick August
[br]b. 17 July 1827 Woolwich, London, Englandd. 6 September 1902 Westminster, London, England[br]English chemist, co-inventor of cordite find explosives expert.[br]His family came from Germany and he was the son of a music master. He first became interested in science at the age of 14, when visiting his mineralogist uncle in Hamburg, and studied chemistry at the Royal Polytechnic Institution in London. In 1845 he became one of the twenty-six founding students, under A.W.von Hofmann, of the Royal College of Chemistry. Such was his aptitude for the subject that within two years he became von Hermann's assistant and demonstrator. In 1851 Abel was appointed Lecturer in Chemistry, succeeding Michael Faraday, at the Royal Military Academy, Woolwich, and it was while there that he wrote his Handbook of Chemistry, which was co-authored by his assistant, Charles Bloxam.Abel's four years at the Royal Military Academy served to foster his interest in explosives, but it was during his thirty-four years, beginning in 1854, as Ordnance Chemist at the Royal Arsenal and at Woolwich that he consolidated and developed his reputation as one of the international leaders in his field. In 1860 he was elected a Fellow of the Royal Society, but it was his studies during the 1870s into the chemical changes that occur during explosions, and which were the subject of numerous papers, that formed the backbone of his work. It was he who established the means of storing gun-cotton without the danger of spontaneous explosion, but he also developed devices (the Abel Open Test and Close Test) for measuring the flashpoint of petroleum. He also became interested in metal alloys, carrying out much useful work on their composition. A further avenue of research occurred in 1881 when he was appointed a member of the Royal Commission set up to investigate safety in mines after the explosion that year in the Sealham Colliery. His resultant study on dangerous dusts did much to further understanding on the use of explosives underground and to improve the safety record of the coal-mining industry. The achievement for which he is most remembered, however, came in 1889, when, in conjunction with Sir James Dewar, he invented cordite. This stable explosive, made of wood fibre, nitric acid and glycerine, had the vital advantage of being a "smokeless powder", which meant that, unlike the traditional ammunition propellant, gunpowder ("black powder"), the firer's position was not given away when the weapon was discharged. Although much of the preliminary work had been done by the Frenchman Paul Vieille, it was Abel who perfected it, with the result that cordite quickly became the British Army's standard explosive.Abel married, and was widowed, twice. He had no children, but died heaped in both scientific honours and those from a grateful country.[br]Principal Honours and DistinctionsGrand Commander of the Royal Victorian Order 1901. Knight Commander of the Most Honourable Order of the Bath 1891 (Commander 1877). Knighted 1883. Created Baronet 1893. FRS 1860. President, Chemical Society 1875–7. President, Institute of Chemistry 1881–2. President, Institute of Electrical Engineers 1883. President, Iron and Steel Institute 1891. Chairman, Society of Arts 1883–4. Telford Medal 1878, Royal Society Royal Medal 1887, Albert Medal (Society of Arts) 1891, Bessemer Gold Medal 1897. Hon. DCL (Oxon.) 1883, Hon. DSc (Cantab.) 1888.Bibliography1854, with C.L.Bloxam, Handbook of Chemistry: Theoretical, Practical and Technical, London: John Churchill; 2nd edn 1858.Besides writing numerous scientific papers, he also contributed several articles to The Encyclopaedia Britannica, 1875–89, 9th edn.Further ReadingDictionary of National Biography, 1912, Vol. 1, Suppl. 2, London: Smith, Elder.CMBiographical history of technology > Abel, Sir Frederick August
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16 Daniell, John Frederick
SUBJECT AREA: Electricity[br]b. 12 March 1790 London, Englandd. 13 March 1845 London, England[br]English chemist, inventor of the Daniell primary electric cell.[br]With an early bias towards science, Daniell's interest in chemistry was formed when he joined a relative's sugar-refining business. He formed a lifelong friendship with W.T.Brande, Professor of Chemistry at the Royal Institution, and together they revived the journal of the Royal Institution, to which Daniell submitted many of his early papers on chemical subjects. He made many contributions to the science of meteorology and in 1820 invented a hydrometer, which became widely used and gave precision to the measurement of atmospheric moisture. As one of the originators of the Society for Promoting Useful Knowledge, Daniell edited several of its early publications. His work on crystallization established his reputation as a chemist and in 1831 he was appointed the first Professor of Chemistry at King's College, London, where he was largely responsible for establishing its department of applied science. He was also involved in the Chemical Society of London and served as its Vice-President. At King's College he began the research into current electricity with which his name is particularly associated. His investigations into the zinc-copper cell revealed that the rapid decline in power was due to hydrogen gas being liberated at the positive electrode. Daniell's cell, invented in 1836, employed a zinc electrode in dilute sulphuric acid and a copper electrode in a solution of copper sulphate, the electrodes being separated by a porous membrane, typically an unglazed earthenware pot. He was awarded the Copley Medal of the Royal Society for his invention which avoided the "polarization" of the simple cell and provided a further source of current for electrical research and for commercial applications such as electroplating. Although the high internal resistance of the Daniell cell limited the current and the potential was only 1.1 volts, the voltage was so unchanging that it was used as a reference standard until the 1870s, when J. Lattimer Clark devised an even more stable cell.[br]Principal Honours and DistinctionsFRS 1814. Royal Society Rumford Medal 1832, Copley Medal 1837, Royal Medal 1842.Bibliography1836, "On voltaic combinations", Phil. Transactions of the Royal Society 126:107–24, 125–9 (the first report of his experiments).Listings of his scientific papers can be found in Catalogue of Scientific Papers, 1868, Vol. II, London: Royal Society.Further ReadingObituary, 1845, Proceedings of the Royal Society, 5:577–80.J.R.Partington, 1964, History of Chemistry, Vol. IV, London (describes the Daniell cell and his electrical researches).B.Bowers, 1982, History of Electric Light and Power, London.GWBiographical history of technology > Daniell, John Frederick
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17 Mansfield, Charles Blachford
SUBJECT AREA: Chemical technology[br]b. 8 May 1819 Rowner, Hampshire, Englandd. 26 February 1855 London, England[br]English chemist, founder of coal-tar chemistry.[br]Mansfield, the son of a country clergyman, was educated privately at first, then at Winchester College and at Cambridge; ill health, which dogged his early years, delayed his graduation until 1846. He was first inclined to medicine, but after settling in London, chemistry seemed to him to offer the true basis of the grand scheme of knowledge he aimed to establish. After completing the chemistry course at the Royal College of Chemistry in London, he followed the suggestion of its first director, A.W.von Hofmann, of investigating the chemistry of coal tar. This work led to a result of great importance for industry by demonstrating the valuable substances that could be extracted from coal tar. Mansfield obtained pure benzene, and toluene by a process for which he was granted a patent in 1848 and published in the Chemical Society's journal the same year The following year he published a pamphlet on the applications of benzene.Blessed with a private income, Mansfield had no need to support himself by following a regular profession. He was therefore able to spread his brilliant talents in several directions instead of confining them to a single interest. During the period of unrest in 1848, he engaged in social work with a particular concern to improve sanitation. In 1850, a description of a balloon machine in Paris led him to study aeronautics for a while, which bore fruit in an influential book, Aerial Navigation (London, 1851). He then visited Paraguay, making a characteristically thorough and illuminating study of conditions there. Upon his return to London in 1853, Mansfield resumed his chemical studies, especially on salts. He published his results in 1855 as Theory of Salts, his most important contribution to chemical theory.Mansfield was in the process of preparing specimens of benzene for the Paris Exhibition of 1855 when a naphtha still overflowed and caught fire. In carrying it to a place of safety, Mansfield sustained injuries which unfortunately proved fatal.[br]Bibliography1851, Aerial Navigation, London. 1855, Theory of Salts, London.Further ReadingE.R.Ward, 1969, "Charles Blachford Mansfield, 1819–1855, coal tar chemist and social reformer", Chemistry and Industry 66:1,530–7 (offers a good and well-documented account of his life and achievements).LRDBiographical history of technology > Mansfield, Charles Blachford
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18 Weldon, Walter
SUBJECT AREA: Chemical technology[br]b. 31 October 1832 Loughborough, Englandd. 20 September 1885 Burstow, Surrey, England[br]English industrial chemist.[br]It was intended that Weldon should enter his father's factory in Loughborough, but he decided instead to turn to journalism, which he pursued with varying success in London. His Weldon's Register of Facts and Occurrences in Literature, Science, and Art ran for only four years, from 1860 to 1864, but the fashion magazine Weldon's Journal, which he published with his wife, was more successful. Meanwhile Weldon formed an interest in chemistry, although he had no formal training in that subject. He devoted himself to solving one of the great problems of industrial chemistry at that time. The Leblanc process for the manufacture of soda produced large quantities of hydrochloric acid in gas form. By this time, this by-product was being converted, by oxidation with manganese dioxide, to chlorine, which was much used in the textile and paper industries as a bleaching agent. The manganese ended up as manganese chloride, from which it was difficult to convert back to the oxide, for reuse in treating the hydrochloric acid, and it was an expensive substance. Weldon visited the St Helens district of Lancashire, an important centre for the manufacture of soda, to work on the problem. During the three years from 1866 to 1869, he took out six patents for the regeneration of manganese dioxide by treating the manganese chloride with milk of lime and blowing air through it. The Weldon process was quickly adopted and had a notable economic effect: the price of bleaching powder came down by £6 per ton and production went up fourfold.By the time of his death, nearly all chlorine works in the world used Weldon's process. The distinguished French chemist J.B.A.Dumas said of the process, when presenting Weldon with a gold medal, "every sheet of paper and every yard of calico has been cheapened throughout the world". Weldon played an active part in the founding of the Society of Chemical Industry.[br]Principal Honours and DistinctionsFRS 1882. President, Society of Chemical Industry 1883–4.Further ReadingT.C.Barker and J.R.Harris, 1954, A Merseyside Town in the Industrial Revolution: St Helens, 1750–1900, Liverpool: Liverpool University Press; reprinted with corrections, 1959, London: Cass.S.Miall, 1931, A History of the British Chemical Industry.LRD -
19 Castner, Hamilton Young
SUBJECT AREA: Chemical technology[br]b. 11 September 1858 Brooklyn, New York, USAd. 11 October 1899 Saranoe Lake, New York, USA[br]American chemist, inventor of the electrolytic production of sodium.[br]Around 1850, the exciting new metal aluminium began to be produced by the process developed by Sainte-Claire Deville. However, it remained expensive on account of the high cost of one of the raw materials, sodium. It was another thirty years before Castner became the first to work successfully the process for producing sodium, which consisted of heating sodium hydroxide with charcoal at a high temperature. Unable to interest American backers in the process, Castner took it to England and set up a plant at Oldbury, near Birmingham. At the moment he achieved commercial success, however, the demand for cheap sodium plummeted as a result of the development of the electrolytic process for producing aluminium. He therefore sought other uses for cheap sodium, first converting it to sodium peroxide, a bleaching agent much used in the straw-hat industry. Much more importantly, Castner persuaded the gold industry to use sodium instead of potassium cyanide in the refining of gold. With the "gold rush", he established a large market in Australia, the USA, South Africa and elsewhere, but the problem was to meet the demand, so Castner turned to the electrolytic method. At first progress was slow because of the impure nature of the sodium hydroxide, so he used a mercury cathode, with which the released sodium formed an amalgam. It then reacted with water in a separate compartment in the cell to form sodium hydroxide of a purity hitherto unknown in the alkali industry; chlorine was a valuable by-product.In 1894 Castner began to seek international patents for the cell, but found he had been anticipated in Germany by Kellner, an Austrian chemist. Preferring negotiation to legal confrontation, Castner exchanged patents and processes with Kellner, although the latter's had been less successful. The cell became known as the Castner-Kellner cell, but the process needed cheap electricity and salt, neither of which was available near Oldbury, so he set up the Castner-Kellner Alkali Company works at Runcorn in Cheshire; at the same time, a pilot plant was set up in the USA at Saltville, Virginia, with a larger plant being established at Niagara Falls.[br]Further ReadingA.Fleck, 1947, "The life and work of Hamilton Young Castner" (Castner Memorial Lecture), Chemistry and Industry 44:515-; Fifty Years of Progress: The Story of the Castner-Kellner Company, 1947.T.K.Derry and T.I.Williams, 1960, A Short History of Technology, Oxford: Oxford University Press, pp. 549–50 (provides a summary of his work).LRDBiographical history of technology > Castner, Hamilton Young
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20 Deacon, Henry
[br]b. 30 July 1822 London, Englandd. 23 July 1876 Widnes, Cheshire, England[br]English industrial chemist.[br]Deacon was apprenticed at the age of 14 to the London engineering firm of Galloway \& Sons. Faraday was a friend of the family and gave Deacon tuition, allowing him to use the laboratories at the Royal Institution. When the firm failed in 1839, Deacon transferred his indentures to Nasmyth \& Gaskell on the Bridgewater Canal at Patricroft. Nasmyth was then beginning work on his steam hammer and it is said that Deacon made the first model of it, for patent purposes. Around 1848, Deacon joined Pilkington's, the glassmakers at St Helens, where he learned the alkali industry, which was then growing up in that district on account of the close proximity of the necessary raw materials, coal, lime and salt. Wishing to start out on his own, he worked as Manager at the chemical works of a John Hutchinson. This was followed by a partnership with William Pilkington, a former employer, who was later replaced by Holbrook Gaskell, another former employer. Deacon's main activity was the manufacture of soda by the Leblanc process. He sought improvement by substituting the ammonia-soda process, but this failed and did not succeed until it was perfected by Solvay. Deacon did, however, with his Chief Chemist F.Hurter, introduce improvements in the Leblanc process during the period 1866–70. Hydrochloric acid, which had previously been a waste product and a nuisance, was oxidized catalytically to chlorine; this could be converted with lime to bleaching powder, which was in heavy demand by the textile industry. The process was patented in 1870.[br]Further ReadingD.W.F.Hardie, 1950, A History of the Chemical Industry in Widnes, London. J.Fenwick Allen, 1907, Some Founders of the Chemical Industry, London.LRD
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