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  1. No Access

    Chapter and Conference Paper

    Virtual Travel Training for People with Learning Disabilities Accessing Employment Including the Introduction to the Special Thematic Session “Virtual Reality”

    The purpose of this project is to develop a Virtual Learning Environment to assist in the travel training of a group of people with learning disabilities to enable them to gain access to training and employmen...

    N. Shopland, J. Lewis, D. J. Brown… in Computers Hel** People with Special Needs (2002)

  2. No Access

    Chapter and Conference Paper

    Online Gardening to Promote Social Inclusion

    There are several European initiatives aimed at producing rehabilitation and associated technologies, in response to a strong North American market created through Disability Act Legislation [1]. In the past we h...

    S. J. Battersby, N. Kelly, D. J. Brown… in Computers Hel** People with Special Needs (2002)

  3. No Access

    Chapter and Conference Paper

    Literacy and Numeracy Edutainment Packages for Disaffected Young Learners

    The UK Government has conducted research into skills gaps within the UK population. It has concluded that there is an alarmingly large proportion of the population with low literacy and numeracy skills.

    D. J. Brown, M. Yazdanparast, J. Lewis… in Computers Hel** People with Special Needs (2002)

  4. No Access

    Article

    Inclusion compounds —Past, present, and future

    J. E. D. Davies, W. Kemula, H. M. Powell, N. O. Smith in Journal of inclusion phenomena (1983)

  5. No Access

    Chapter and Conference Paper

    Crystal Structures of Some Compounds Containing Bonds between Dissimilar Metal Atoms

    In the last few years many compounds have been synthesised in which two, or more, metal atoms are linked. It has been known for some time that atoms of the same metallic element are joined together in sone com...

    H. M. Powell, K. Mannan, B. T. Kilbourn… in Proceedings of the 8th International Confe… (1964)

  6. Article

    New Procedures for Resolution of Racemic Substances

    EXCEPT for Pasteur's original procedure of sorting crystals by hand, the methods practised or suggested for the preparation of substances in optically active form depend on the use of a dissymmetric substance ...

    H. M. POWELL in Nature (1952)

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  7. No Access

    Article

    Crystal Structure of ‘Quinaldil’

    THE substance of empirical formula C20H12O2N2 prepared by Brown and Hammick1 by the action of potassium cyanide on quinoline-2-aldehyde, or by the decarboxylation of picolinic or quinaldinic acid in quinoline-2-a...

    D. R. DAVIES, H. M. POWELL in Nature (1951)

  8. No Access

    Article

    Structure of Clathrate Compounds

    H. M. POWELL in Nature (1951)

  9. No Access

    Article

    Crystal Structure of 44′-Dihydroxydiphenyl

    CRYSTALS of 44′-dihydroxydiphenyl can be obtained as thin plates from alcohol–water solution or by sublimation. By optical and X-ray examination, they are found to be monoclinic with the b- and c-axes in the plan...

    S. C. WALLWORK, H. M. POWELL in Nature (1951)

  10. No Access

    Article

    An Inert Gas Compound

    IN clathrate compounds, one molecular component forms an enclosing structure trap** the second component, for which it need have little attraction. From a consideration of their properties it was suggested1 tha...

    H. M. POWELL, M. GUTER in Nature (1949)

  11. No Access

    Article

    Clathrate Compound Formed by Benzene with an Ammonia–Nickel Cyanide Complex

    THE clathrate type of molecular compound is formed by the imprisonment of one sort of molecule in some kind of cage structure of the other component. In the compound the molecular component M is trapped during fo...

    H. M. POWELL, J. H. RAYNER in Nature (1949)

  12. No Access

    Article

    Beta-quinol : an Example of the Firm Union of Molecules Without the Formation of Chemical Bonds Between Them

    THE substance formerly called 'β-‘quinol and obtained by crystallization of quinol from methanol has been shown1 to be a compound of three molecules of quinol with one molecule of methanol. It is one of a series ...

    H. M. POWELL, P. RIESZ in Nature (1948)

  13. No Access

    Article

    Hydrogen Bond Linking of Quinol Molecules

    CRYSTAL structure examination has shown that quinol molecules may link by hydrogen bonds in a special manner. The compound SO2.3C6H4(OH)21 is found to have a rhombohedral lattice; the corresponding hexagonal unit...

    D. E. PALIN, H. M. POWELL in Nature (1945)

  14. Article

    Crystal Structure of Phosphorus Pentabromide

    IT has been shown1 that phosphorus pentachloride has an ionic type of crystal structure which is tetragonal and contains [PCl4]+ and [PCl6]π groups. Phosphorus pentabromide is entirely different in crystalline fo...

    H. M. POWELL, D. CLARK in Nature (1940)

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  15. Article

    Crystal Structure of Phosphorus Pentachloride

    ALTHOUGH much work has been done on the molecular structure of phosphorus pentachloride, no crystal structure determination of this important substance has previously been made, presumably owing to experimenta...

    H. M. POWELL, D. CLARK, A. F. WELLS in Nature (1940)

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  16. Article

    Structure of Aromatic Polynitro Compound - Hydrocarbon Complexes

    THE most obvious evidence of interaction of some kind between aromatic polynitro compounds and other aromatic substances is the isolation of many crystalline compounds containing the two components in simple m...

    H. M. POWELL, G. HUSE in Nature (1939)

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  17. No Access

    Article

    Layer-chain Structures of Thallium Di-Alkyl Halides

    DURING the last year we have been studying the crystal structures of a series of compounds R2TIX, which prove to be of some interest in view of the recent work on the rotation of molecules in crystals. The dimeth...

    H. M. POWELL, D. M. CROWFOOT in Nature (1932)