Bibliothek

Notizen: Book Reviewed in this article:Crisis Behaviour TheoryComparing Welfare OrientationsTaking Politics out of IdeologyA Sceptical Look at Select CommitteesDemocratic SensibilityHistory as Progress or Decay?Analysing Psychoanalysis

Notizen: Paramoeba invadens n. sp. is described from sea urchin tissues and from culture. Amoebae are 20–40 μm in length with an irregular hyaline region producing short subpseudopodia. One parasome per cell is present. The parasome is bipolar with basophilic, Feulgen-positive poles and a Feulgen-negative median segment. The fine structure of the parasome resembles those in other species of Paramoeba and the surface of the amoeba is plain with no hairs or scales. Amoebae dislodged from tissues often adopt a semifloating form; floating forms have been seen in culture. Amoebae circulate within lumina of the water vascular system and can migrate readily into or out of tissues.

Notizen: Micron-sized loops of high-mobility two-dimensional electron gas have been made on GaAs-AlGaAs heterostructures using a novel split-gate technique. Aharonov–Bohm oscillations of amplitude up to 20% of the device resistance have been observed at very low temperatures (T〈100 mK), together with h/2e oscillations which appear to be due to interference between pairs of time-reversed paths near B=0. The h/e period is found to vary by ∼25% with magnetic field, possibly as a result of the formation of edge states. In the quantum Hall effect, plateaus in Rxx are seen at high B due to variations in carrier concentration across the ring, which may cause backscattering of some edge states.

Notizen: Thin superconducting Bi-Sr-Ca-Cu-O films have been grown by reactive magnetron sputtering with an average cation ratio of 2:2:1:2 on single-crystal (100)MgO. Films show a superconducting transition onset at 117 K, but do not go to zero resistance until 83–84 K. Secondary electron microscopy and electron beam microprobe showed two major phases with different compositions and morphologies. The dominant phase was a lamellar phase with composition very close to the 2:2:1:2 cation ratio. The second phase had a needle-like morphology, which was deficient in Bi, and had excess Cu. The nonsuperconducting Sr14−xCaxCu24O41 phase had been known to exist in bulk; therefore, the needle phase could be an intermediate step in the formation of Sr14−xCaxCu24O41 phase as Bi deficiency in the needles increased with increasing annealing temperature and/or time.

Notizen: We have studied the structure and optical stability of Te–Cu thin film alloy candidates for write-once optical recording. Films prepared by rf diode sputtering with 20–50 at. % Cu are amorphous, as-sputtered. One of these, Te65 Cu35 , has a relatively high crystallization temperature (150 °C), as determined by x-ray diffraction. Near the eutectic composition (∼29 at .% Cu), alloy films have stable optical properties after accelerated aging at 60 °C and 85% relative humidity. The mechanism for film stability near the eutectic was studied by x-ray photoelectron spectroscopy and depth profiling using ion scattering spectroscopy. We found that a Cu-enriched surface oxide, formed at ambient conditions, passivates the film and is responsible for its subsequent stability after accelerated aging. We also demonstrated that a 14 in. diam, multilayer optical disk with a Te65 Cu35 recording medium exhibits excellent linearity for 3 and 8 MHz pulses, good written pulse length stability, and high signal-to-noise ratio. Thus, a Te–Cu recording medium can effectively use run-length-limited codes, which allow very high data storage capacity and data transfer rates.

Notizen: A new experimental procedure for conducting reactive laser vaporizations is described and applied to the generation of the previously unreported copper radicals, 13CH3CuF, 12CH3CuF, HCuF, and DCuF, for rare gas matrix ESR investigations. Laser vaporization was conducted on a thin film of reactant condensed on the copper metal surface. The g and A tensors for these are compared with other small copper radicals in order to determine electronic structure and bonding trends. The neon magnetic parameters (MHz) for 13CH363CuF are: g(parallel) =1.965(1), g⊥ =2.3626(3); A(parallel)(63Cu) =3076(2), A⊥(63Cu) =2993(1); A(parallel)(19F) =94(1), A⊥(19F) =68(1); A(parallel)(13C) =19(1), A⊥(13C) 〈3. The H quartet hfs for CH3CuF was resolved on the perpendicular transitions, having an A value of 9.3(3) MHz. For H63CuF, the neon results (MHz) are: g(parallel) =1.975(1); g⊥ =2.4075(4); A(parallel)(63Cu) =2826(3), A⊥(63Cu) =2717(1); A(parallel)(19F) =127(2), A⊥(19F) =94(1); A(parallel)(H) =61(3), and A⊥(H) =29(1) MHz.

Notizen: Jack Hayward and Philip Norton (eds), The Political Science of British Politics (Brighton, Wheatsheaf Books, 1986)Ian Harden and Norman Lewis, The Noble Lie: the British Constitution and the Rule of Law (London, Hutchinson, 1986)Patrick Birkinshaw, Grievances, Remedies and the State (London, Sweet and Maxwell, 1985)Tony Prosser, Nationalised Industries and Public Control: Legal, Constitutional and Political Issues (Oxford, Basil Blackwell, 1986)Zig Layton-Henry and Paul B. Rich (eds), Race, Government and Politics in Britain (Basingstoke, Macmillan, 1986)L. Lustgarten, The Governance of Police (London, Sweet and Maxwell, 1986)R. Geary, Policing Industrial Disputes, 1893 to 1985 (Cambridge, Cambridge University Press, 1985)Nicholas Deakin (ed.), Policy Change in Government: Three Case Studies (London. Royal Institute of Public Administration, 1986)R. W. Johnson, The Politics of Recession (Basingstoke, Macmillan, 1985)Nick Buck, Ian Gordon and Ken Young with John Ermisch and Liz Mills, The London Employment Problem (Oxford, Clarendon Press for the Economic and Social Research Council, 1986)K. Spencer, A. Taylor, B. Smith, J. Mawson, N. Flynn and R. Bailey, Crisis in the Industrial Heartland: a Study of the West Midlands (Oxford, Oxford University Press, 1986)William Lever and Chris Moore (eds), The City in Transition: Policies and Agencies for the Economic Regeneration of Clydeside (Oxford, Oxford University Press/ESRC Inner Cities Research Programme, 1986)John Foster and Charles Woolfson, The Politics of the UCS Work-in (London, Lawrence & Wishart, 1986)Ken Coates and Tony Topham, Trade Unions and Politics (Oxford, Basil Blackwell, 1986)Geoffrey L. Woodcock, Planning, Politics and Communications (Aldershot, Gower, 1986)Nigel Gray, The Worst of Times: an Oral History of the Great Depression in Britain (London, Wildwood House, 1986)G. C. Peden, British Economic and Social Policy: Lloyd George to Margaret Thatcher (Deddington, Philip Allan, 1985)Hugo Young and Anne Sloman, The Thatcher Phenomenon (London, BBC Publications, 1986)Edward Goldsmith and Nicholas Hildyard (eds), Green Britain or Industrial Wasteland? (Oxford, Polity Press, 1986)Tony Hall, Nuclear Politics (Harmondsworth, Penguin, 1986)Graham Cox, Philip Lowe and Michael Winter (eds), Agriculture: People and Policies (London, Allen & Unwin, 1986)Vilma Flegmann, Public Expenditure and the Select Committees of the Commons (Aldershot, Cower, 1986)