Limpar
56.133 resultados

Acesso aberto

Tipo do recurso

Tipo de base de dados

Ano de criação

Produção nacional

Revisado por pares

Áreas

Idioma

Editores

Primary Document Acesso aberto

Sales, J. (Jean),

Book.

0000 - Gale Group | The Making of Modern World

Artigo Revisado por pares

JD Blackwood, BD Cullis, DJ McCarthy,

... and a detailed study .of the behaviour of chars made from brown coal has also been made. ... methane. Once this initial desorption has ceased, the char shows a steady rate of reaction with hydrogen ... long been assumed that the reactivity of a char or impure carbon to hydrogen is partly dependent ... recently been shown3 that for a brown coal char, prepared by heating the original coal in a ... dry, oxygen-free nitrogen, the reactivity of the char is related exponentially to the temperature to which the char has been heated. Further, a char prepared for ...

Tópico(s): Fiber-reinforced polymer composites

1967 - CSIRO Publishing | Australian Journal of Chemistry

Outros Acesso aberto

Chars. A. B. Hall,

... 616, 617, 745, 746, 1054, 1055. Letter. From Chars. A. B. Hall.

0000 - Gale Group | NCCO-STM 1of2

Artigo Revisado por pares

James W. Moore, Ian Moore,

Arctic char, Salvelinus alpinus (L.), captured during the summer, 1972, in Cumberland Sound, Baffin Island, fed mainly on planktonic ... in the species composition of the diet of char of different lengths was due primarily to size ... organisms increased four and 90 times, respectively, as char increased from 4 to 85 cm. Char less than 10 cm in length captured in ... longer than 10 cm fed predominantly on other char. During the winter the stomachs of the smaller ... always empty while the diet of the large char was restricted to other fish. Most species available ...

Tópico(s): Aquaculture Nutrition and Growth

1974 - Wiley | Journal of Fish Biology

Outros Acesso aberto

Chars. Reckett,

1820, July - December. All Counties. Letter. From Chars. Reckett. To Rt Honble Lord Viscount Sidmouth.

0000 - Gale Group | NCCO BritishPolitics

Artigo Revisado por pares

I.M. Ismail, P.L. Walker,

Abstract Chemisorption of oxygen on samples of Saran char was followed at 100°C by differential scanning ... analysis. The three samples used were: a Saran char prepared at 900°C; this char containing about 100 ppm of iron; and this char activated in air at 425°C to 63. ... negligible. Both the addition of iron to Saran char and its activation increase the rate and enthalpy ( ... or the rate of chemisorption on the activated char is also enhanced by increasing the degassing (desorption) ... of desorption-chemisorption of oxygen on the activated char, the rate of oxygen chemisorption decreases for outgassing ...

Tópico(s): Thermal and Kinetic Analysis

1980 - Elsevier BV | Journal of Colloid and Interface Science

Outros Acesso aberto

Chars. Fletcher,

1801, May - December Letter. From Chars. Fletcher. 33 Frith Street Soho.

0000 - Gale Group | NCCO BritishPolitics

Artigo Revisado por pares

P.L. Walker,

... and simplified reaction was created to explore the char reactivity and combustion behavior during oxy-fuel combustion. Two large-scale (>40,000 carbon atoms) coal chars (higher- and lower-porosity chars) that differ primarily in pore volume and pore ... rate (number of atoms reacting), size of the char, and apparent density were captured. Post analysis evaluated ... volume, and atomic surface area. The higher porosity char burn-off was ∼38% more rapid than the ... number of steps), similar to the lower porosity char (∼33% faster). The peak reactivity followed the maximum ...

Tópico(s): Coal and Its By-products

1980 - Elsevier BV | Fuel

Periodico Acesso aberto

J-STAGE

Outros Acesso aberto

Chars. Gilbert,

1801, May - December Letter. From Chars. Gilbert. To Lord Pelham. Leurs House.

0000 - Gale Group | NCCO BritishPolitics

Artigo Revisado por pares

J.H. Block,

... the pyrolysis of sludge, the heterogeneous reaction between char and NH3 can reduce the release of NH3. ... mechanism of conversion of NH3 to N2 by char and char modified by adding CaO using 5-ring polycyclic aromatic hydrocarbon (PAH) as a char model. First, the adsorption characteristics of NH3 on char, CaO/char, and Ca/char were studied. The results indicate that among the ... stable adsorption sites, the unsaturated sites in the char can provide adsorption sites for NH3, which can ... configurations was studied. The results indicate that, on char, NH3 is stably adsorbed and cannot form NH2· ...

Tópico(s): Phosphorus and nutrient management

1973 - Elsevier BV | Journal of Catalysis

Periodico Acesso aberto

J-STAGE

Documentos governamentais Acesso aberto

C. C. Chars,

... at Chemulpho.: Volume 663 Telegram. From C. C. Chars. China.

0000 - Gale Group | NCCO AsiaWest

Artigo Revisado por pares

Vincent Ciuryla, R.F. Weimer, David A. Bivans, Stephen A. Motika,

... thermogravimetric characterization of four different coals and their chars was performed to obtain fundamental information on pyrolysis and coal and char reactivity for these materials. Using a Perkin-Elmer ... under various experimental conditions, and for its derived char heated in air over a temperature range of ... large. For combustion in air, the overall coal/char reactivity sequence as determined by comparison of sample ... lignite coal ≈ Montana lignite coal > North Dakota lignite char > III. No. 6 bituminous coal ≈ Pittsburgh Seam bituminous ...

Tópico(s): Coal Properties and Utilization

1979 - Elsevier BV | Fuel

Periodico Acesso aberto

J-STAGE

Jornais Acesso aberto

AN INHABITANT OF BATTLE., BRITANNICUS., JEREMY DIDDLED.,

... AND MURDER.-The inhabitants of the commune of Chars, arrondissement of, THE THUNDER STORM AT MITCHAM.-On ...

1837 - Gale Group | TDA

Artigo Revisado por pares

Yih H. Song, J.M. Beér, Adel F. Sarofim,

... The reactions of organically-bound nitrogen in coal char during combustion have been studied in a laboratory furnace using size-graded char particles prepared by the pyrolysis of a Montana ... resolved variations of nitrogen-to-carbon ratio during char oxidation have reveated that there is no selectivity ... carbon loss due to oxidation but that the char-nitrogen can undergo devolatilization in parallel with the ... devolatilization is unimportant, as in the case for char, and (2) the oxidation of nitrogen and carbon ...

Tópico(s): Catalytic Processes in Materials Science

1982 - Taylor & Francis | Combustion Science and Technology

Periodico Acesso aberto

J-STAGE

Jornais Acesso aberto

Giles Smith, Richard Mabey, Andrew Robson, Janice Turner, Gabriele Marcotti, Peter Brookes, Christina Hardyment, John McNamara, Stella Shamoon, Richard Whitehead, Thair Shaikh, Robert Cole, Andrew Billen, Bel Mooney, Susannah, Rupert Mellor, Neelam Verjee, David Canter, Paul Foster, Adrian Lee, Adam Sherwin Media Reporter, Jane MacQuitty, Simon Rocker, David Hands and Mark Souster, Simon Barnes, Giles Hunt, Magnus Linklater, Peter Lansley, Tim De Lisle, Peter Longhurst, Jill Hartley, Robert Thicknesse, Bruce Millar, Michael Owen, Anita James, Paul Hoggart, Phil Hoad, Charles Saumarez Smith, Simon Pegg, Barry J Holmes, Philip Howard, Richard Beard, Hannah Betts, Carol Midgley, Christine Seib, James Bone, Rachel Campbell-Johnston, Dominic Wells, Clare Tomlinson, Clive Davis, Bryan Thwaites, Richard Hobson One-Day Cricket Correspondent, Kate Reardon, Alan Milburn, John Bungey, Philippa Gregory, Kevin Eason, James Eve, Geoff Brown, V. S. Nalpaul, author, Clare Stewart, Giles Coren, Alastair Campbell, Peter Wenban, Ben Webster Transport Correspondent, Pat Gibson, Valerie Elliott Countryside Editor, David McVay, John Clarke, Pauline Tett, Stewart Tendler Crime Correspondent, Andrew Drummond and Simon de Bruxelles, Katherine Swift, Ben Lyttleton, Keith Vaz, Ally McCoist, Dominic Walsh, James Doran Wall Street Correspondent, Debra Craine, Ruth Leveson, Mike Pattenden, Tom Charity, Norman Harris, Joe Morgan, Grainne Gilmore, Tim Reid, Daniel Finkelstein, Angela Jameson Industrial Correspondent, Ruth Gledhill Religion Correspondent, Dalya Alberge Arts Correspondent, Tom Gatti, Richard Ford Home Correspondent, Jo Morris, Candida Crewe, Alan Hamilton, Robin Matthews, Anthony Browne Brussels Correspondent, DR Thomas Stuttaford and Suzi Godson, Jenny MacArthur, Joanna Lumley and John Simpson, Matt Smith, Juliette Kellow, Phil Gordon, Roland Watson, Louis Vuitton Jewellery, Tina Gaudoin, Charles Bremner, Robbie Earle, Richard Guy, Ron Lewis, Ian McShane, Genevieve Fox, Tim Teeman, Jennifer Berridge, Roger Alford, Patience Wheatcroft Business Editor, Alistair Horne, Derwent May, Angela Jameson, Kate Muir, Graham Wood, Andrew Norfolk and Lewis Smith, Ivan Hewett, Arwa Haider, Robert Burrow, Tom Petherick, Clive Tyldesley, Russell Kempson, Peter Paphides, David Rowan, Tom Whitwell, Daniel McGrory, Nicole Swengley, Richard Cork, Carola Long, Oliver Kay, Stephen Anderton, Amber Cowan, Lisa Grainger, David Lister, Mark Atherton, Lisa Armstrong, John Westerby, Rick Broadbent, Patrick Hosking Investment Editor, Tom Baldwin, Rob Hawthorne Sky Sports Commentator, Stephen Burgen, Mark Henderson Science Correspondent, Chris Power, Jailhouse Rock, Rob Yorke, Geoffrey Dean, Rob Wright, Elaine Monaghan, Annie Shaw, Amanda Platell, James Jackson, Lisa Stansfield, Lucan, E. B. Hobson, Neil Harman Tennis Correspondent, Raymond Keene, AJ, Lewis Smith, Matthew Pryor, Sean MacAulay, Matt Dickinson, Richard Ford and Stewart Tendler, Gordon Ramsay, Anna Nicholson, Michael Miller, Tom Baldwin, James Bone and David Lister, Jennifer Pollard, Nigel Hawkes, Jeremy Page, Christopher Knight and Alan Butler, ED Potton, Liz Knight, Graham Mulley (Chairman, Dunwich Museum), Ellin Stein, Samson, Patrick Hosking, Richard Owen, J. R. M. Thacker, Helen Nugent, Christopher Martin-Jenkins Chief Cricket Correspondent, Alex Hawkes, Mick Hume, Roger Boyes, Catharine Morris, Martin Tyler, Peter Dixon, Chloë Bryan-Brown, Graham Searjeant Personal Investor, Andy Gray, Carolyn Asome, David Hands Rugby Correspondent, Chloë Sevigny, Peter Taylor, Julian Muscat, Siân Morgan, Adam Fresco, Peter Young, Chris Condron, Anna Frame, Howard Nicholson, Nigel Kendall, Nick Szczepanik, Michael Robinson, James Doran, Philip Webster Political Editor, Giles Whittell, Andrew Mueller, Robert Crampton, Christopher Maguire, Julie Burchill, Ian Johns, Norman Foster, Matthew Parris, Mike Barnard, Doug McKinlay, Jonathan Rendall, John Lister-Kaye, Rebecca Ley, Ingrid Mansell, Sheila Keating, Simon Callow, Tim Wapshott, Margaret Greiff, Iain Finlayson, Ben MacIntyre, Ben Webster, Alison Gibson, Lucia van der Post, Jack Malvern Arts Reporter, Graham Searjeant, John Naish, Geoffrey Rowell, Anne Ashworth Personal Finance Editor, Martin Waller, Mark Henderson, Michael Horsnell, Gillian Harris, Chris Ayres, Guy Herbert, Alex Murphy, Carl Mortished International Business Editor, Laura Peek, Victoria Smith, Ashling O'Connor, Benedict Nightingale, Darian Leader, Andy Mayer (Director), Anna Shepard, Angus Batey, Stephen Dalton, Jill Crawshaw, Nicola Woolcock, F. M. M. Steiner, Trinny and Susannah, Richard Morrison, Paul Connolly, Tom Chesshyre, Fred Dellar, James Christopher, Bill Edgar, Valerie Grove, Simon Crompton, Michael Coffin, Michael Evans, Glenys Kinnock, DR Jane Collins, Alan Lee Racing Correspondent, Owen Slot, Cath Urquhart Travel Editor, Soul Plane, Jan Raath, Jenny Davey, Tim Johnston, DR Feelgood, Daphne Lockyer, Peter Klinger, Cat Deterrents, Joe Bolger, Frances Osborne, Christopher Irvine, Chloe Bryan-Brown,

... body Ablution solutions As the country's top chars turn the spotlight on personal hygiene, John 'Nice ...

2004 - Gale Group | TDA

Artigo Revisado por pares

John W. Jensen,

Anadromous Arctic char, Salvelinus alpinus, have been limited on the Norwegian coast to areas north of 65°N. In 1967 anadromous char invaded the river Granvinelv in the Hardangerfjord at ... rise to a dense population of stationary freshwater char in the lake Granvinvatn. During 1978–79 anadromous char spread to several rivers at the head of ... very probably function as a subarea of the char. The available data indicates that an average coastal ... 4–5 m depth is limiting the anadromous char to the south on the Norwegian coast. Continuous ...

Tópico(s): Ecology and biodiversity studies

1981 - Canadian Science Publishing | Canadian Journal of Fisheries and Aquatic Sciences

Periodico Acesso aberto

J-STAGE

Outros Acesso aberto

March 31-July 16, 1873 Letter. To Chars. Shepard Esq. Yokohama, Japan.

0000 - Gale Group | NCCO AsiaWest

Artigo

Mei-In M. Chou, D.R. Dickerson, Dale R. McKay, James S. Frye,

ABSTRACT Chars from the Illinois Springfield (No. 5) Coal are prepared by flash pyrolysis at progressively higher charring temperatures. The results of a study of these chars by 13C NMR with CP/MAS indicate that ... initial stage of heating (300°C) produces a char with aromatic carbon fraction (far) of 68%, and successive heating gives chars with far of 70% (400°C), 73% (500° ... amount of aromatic and aliphatic carbon in the char can be calculated by using the NMR measurements, the organic carbon content of the char, and the weight of the char. The calculated ...

Tópico(s): Zeolite Catalysis and Synthesis

1984 - Taylor & Francis | Liquid Fuels Technology

Periodico Acesso aberto

J-STAGE

Artigo

Constance Senior, Richard C. Flagan,

Synthetic chars have been produced in order to facilitate the study of ash vaporization mechanisms. The synthetic chars are glassy carbons produced by the polymerization of ... polymer prior to curing in order to generate chars for which the ash thermodynamics are known. Although ... resulting pore structure substantially alters the way the char burns. Ash vaporization from synthetic chars containing 1 to 4 micron quartz inclusions was ... K and 2900 K. Quartz in the synthetic char appeared to be vaporized directly rather than by ...

Tópico(s): Thermal and Kinetic Analysis

1985 - Elsevier BV | Symposium (International) on Combustion