Thomas Graham

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Graham, Thomas,

1805–69, Scottish chemist, best known for research in diffusiondiffusion,
in chemistry, the spontaneous migration of substances from regions where their concentration is high to regions where their concentration is low. Diffusion is important in many life processes.
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 in both gases and liquids that led to his formulation of Graham's law. His discovery that certain substances (e.g., glue, gelatin, starch) pass through a membrane more slowly than others (inorganic salts, e.g., common salt, or sodium chloride) led him to draw a distinction between the two groups, calling the former (the slower) colloids and the latter crystalloids. In this connection he discovered dialysis. His work was the earliest in colloidal chemistry. His investigation of phosphoric acid led to the present chemical concept of polybasic acids.

Graham, Thomas

 

Born Dec. 20, 1805, in Glasgow; died Sept. 11, 1869, in London. British chemist; one of the founders of colloid chemistry.

From 1837 to 1855, Graham was a professor at University College, London, and later director of the mint. In 1836 he was made a fellow of the Royal Society. Graham was one of the founders of the London Chemical Society, and he was elected its first president in 1841. In 1829, Graham discovered the law that the rate of diffusion of a gas is inversely proportional to the square root of its density. In 1833 he disproved, on the basis of the three forms of phosphoric acid (ortho, pyro, and meta), the view that all acids are monobasic. He established the presence of internal friction in gases (1846–49). In 1861 he showed that, according to their capacity to diffuse through a parchment membrane (dialysis), all substances fall into one of two classes—crystalloids or colloids.

WORKS

“On the Law of Diffusion of Gases.” Transactions of the Royal Society of Edinburgh, 1834, vol. 12.

REFERENCE

Moore. F. J. Istoriia khimii. Moscow-Leningrad. 1925. Pages 142— 45. (Translated from English.)
References in periodicals archive ?
Home - (Yorkshire names first): Graeme Wilson (Lower Hopton) 20 Andy Thornton 21, Peter Jagger (Wyke) 19 Steve Smith 21, Dave Fisher (Alverthorpe) 10 Graham Law 21, John Spinks (Pudsey BC) 21 Paul Clarke 14, Harry Seerha (Spen Vic) 21 Mark Ashburn 8, Andrew Heaume (Canalside) 21 Simon Brown 13, Martin Griffish (Lindley Lib) 21 Dan Vercoe 14, Craig Gant (Netherton Con) 16 Kieron Clarke 21, Robert Hitchen (Lower Hopton) 21 Martin Wilson 12, Ashley Tattersley (Lower Hopton) 21 Kieron Dodd 17, Jack Dyson (Netherton Con) 21 James Dennison 9, Ashley Daykin (Netherton Con) 21 Tom Dennison 17.
In a press release, the group said that it had appointed Lawrence Graham law firm to work with, BDO Capital Finance to restructure the company's obligations and liabilities towards the Bahrain-based Awal Bank which is owned by the Group.
Draw at Brighouse - Graeme Wilson (Lower Hopton, c) v Andy Thornton, Peter Jagger (Wyke) v Steve Smith, Dave Fisher (Alverthorpe) v Graham Law, John Spinks (Pudsey BC) v Paul Clarke, Harry Seerha (Spen Vic) v Mark Ashburn, Dave Fox (Kirkheaton Con) v Simon Brown, Graham Hickey (Lower Hopton) v Dan Varcoe, Craig Gant (Netherton Con) v Kieron Clarke, Robert Hitchen (Lower Hopton) v Martin Wilson, Ashley Tattersley (Lower Hopton) v Kieron Dodd, Jack Dyson (Netherton Con) v James Dennison, Ashley Daykin (Netherton Con) v Tom Dennison.
SRU spokesman Graham Law said last night: "The door remains open for discussion
SURE-FOOTED stand-off Graham Law proved the difference between the two Super League strugglers as Wakefield emerged victorious against Warrington.
30): James Hanson (Pudsey) v Mark Booth (Doncaster), Graham Law (Salford) v Craig Gant (Huddersfield), Chris Kelly (Sheffield) v Matt Jones (Dukinfield), Richard Goldby (Burton-on-Trent) v Nigel Cranston (Leeds), Joe Bray (Cleckheaton) v Kevin Nixon (Doncaster), Ryan Clark (Sheffield) v Paul Dudley (Whitefield), Andrew Thompson (Burton-on-Trent) v Roger Crowther (Huddersfield), Liam Griffin (Leeds) v Andrew Jones (Dukinfield).
But Wakefield drew level 6-6 at the break after Briers drop out from under the posts sailed straight into touch and Graham Law accepted the penalty.
Courses have already been run with dressage rider Serena Pincus and event riders Graham Law and Andrew Benney.
Graham Law, the SRU spokesman, said: "We suggest Caerphilly make contact although any proposal must tie in with our existing strategies.
Sunday's draw is: Simon Walder (Spen Victoria) v Paul Leah (Ashton U Lyme), Gareth McMahon (Netherton Con) v Mike Geraghty (Lloyds), Paul Dudley (Hollinhurst) v Tony Throup (Spen Victoria), Debbie Talbot (Dodworth) v Martin Griffiths (Elland WM), Gary Siswick (Crosland Moor) v Harry Seehra (Spen Victoria), Lee Schofield (Dodworth) v Graham Law (Lloyds), Gary Foulkes (Ossett Flying Horse) v Andrew Wadsworth (Canalside), Marcus Hill (Penistone) v Mark Ellis (Spen Victoria).
Team spokesman Graham Law said: "Kenny will not play until he has been cleared by a neurologist.