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  • 1
    Electronic Resource
    Electronic Resource
    Optical power limiting of fullerenes (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 2785-2787 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Optical power limiting processes in C60 solutions have been measured in a double-pass geometry designed to produce high beam attenuation. Based on the concentration of C60 and measured attenuation of laser fluence, it was found that, at high intensities, more than 100 visible (532 nm) photons per C60 molecule can be absorbed during a single 7-nanosecond laser pulse. The requisite features of such efficacious attenuation mechanisms are briefly discussed and a model meeting the requirements is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111470
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of 2,3-butanedione monoxime on myosin and myofibrillar ATPases. An example of an uncompetitive inhibitor (1992)
    s.l. : American Chemical Society
    Biochemistry 31 (1992), S. 12227-12232 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00163a036
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  • 3
    Electronic Resource
    Electronic Resource
    X-Ray Diffraction Studies of Muscle (1981)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 43 (1981), S. 553-565 
    Details
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ph.43.030181.003005
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular approaches to the analysis of nitrate assimilation (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 11 (1988), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. The application of molecular approaches such as mutant analysis and recombinant DNA technology, in conjunction with immunology, are set to revolutionize our understanding of the nitrate assimilation pathway. Mutant analysis has already led to the identification of genetic loci encoding a functional nitrate reduction step and is expected to lead ultimately to the identification of genes encoding nitrate uptake and nitrite reduction. Of particular significance would be identification of genes whose products contribute to regulatory networks controlling nitrogen metabolism. Recombinant DNA techniques are particularly powerful and have already allowed the molecular cloning of the genes encoding the apoprotein of nitrate reductase and nitrite reductase. These successes allow for the first lime the possibility to study directly the role of environmental factors such as type of nitrogen source (NO3− or NH4+) available to the plant, light, temperature water potential and CO2 and O2 tensions on nitrate assimilation gene expression and its regulation at the molecular level. This is an important advance since our current understanding of the regulation of nitrate assimilation is based largely on changes of activity of the component steps. The availability of mutants, cloned genes, and gene transfer systems will permit attempts to manipulate the nitrate assimilation pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1988.tb01361.x
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  • 5
    Electronic Resource
    Electronic Resource
    Filament geometry and the activation of inisect flight muscles (1979)
    [s.l.] : Nature Publishing Group
    Nature 280 (1979), S. 325-326 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The staggered array of six actin filaments round each myosin filament in the lattice3 is shown in Fig. la, 'unrolled' to form a radial projection. The solid bars are regions analogous to 'target areas' of the rigor state3, assumed to be accessible to attachment of active bridges, and they occur ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/280325a0
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  • 6
    Electronic Resource
    Electronic Resource
    High protein mobility in skinned rabbit muscle fibres observed by ^1H NMR spectroscopy
    Amsterdam : Elsevier
    FEBS Letters 298 (1992), S. 226-228 
    Details
    ISSN: 0014-5793
    Keywords: Mobility ; Muscle ; Myosin ; NMR ; Skinned fibres
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(92)80063-M
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  • 7
    Electronic Resource
    Electronic Resource
    Correct translation of data parallel assignment onto array processors (1994)
    Springer
    Formal aspects of computing 6 (1994), S. 417-439 
    Details
    ISSN: 1433-299X
    Keywords: Data parallelism ; Array assignment ; Programming models ; Architectural models ; Array processor ; Correct translation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Two models of computation which are suitable for the description of parallel scientific calculations on large data structures are presented. Data parallel assignment is a construct which may be used to specify the application of a set of order independent fine grained operations to a regular data structure. It is formulated in a machine independent way and, consequently, is suitable for implementation on a range of novel parallel architectures. An operational model of data parallel computation is provided by specifying a model array processor. The specification captures the essential features of the class of array processors and it may be instantiated in order to define a particular machine. A formal operational semantics of data parallel assignment is given for the model array processor. The translation mechanism is shown to be correct. The exercise clarifies some of the issues in deciding whether or not it is feasible to translate data parallel assignment directly onto array processor architectures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01211307
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  • 8
    Electronic Resource
    Electronic Resource
    Molecular Packing in Collagen (1971)
    [s.l.] : Nature Publishing Group
    Nature 230 (1971), S. 437-439 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] X-ray diffraction suggests an intermediate level of organization in collagen fibrils: a grouping of the tropocollagen molecules into five-stranded ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/230437a0
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  • 9
    Electronic Resource
    Electronic Resource
    Photocontrol of nitrite reductase gene expression in the barley seedling (Hordeum vulgare L.) (1993)
    Springer
    Planta 192 (1993), S. 110-117 
    Details
    ISSN: 1432-2048
    Keywords: Gene expression ; Nitrate ; Nitrite reductase (Control) ; Phytochrome ; Hordeum (nitrite reductase gene expression)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nitrite reductase (NIR, EC 1.7.7.1) — a key enzyme of nitrate assimilation — is known to be induced by nitrate and light. In the present work with barley (Hordeum vulgare L.) seedlings, control of NIR gene expression by light and its dependency on intact plastids was studied. The major results were as follows: (i) It was confirmed that a single isoform of NIR occurs in shoot and root. (ii) Any light-mediated increase of NIR activity is strictly correlated with an increase in cross-reacting material. (iii) Exogenous nitrate is absolutely required for NIR synthesis and the appearance of NIR transcripts. The nitrate effect is saturated at 10 mM. (iv) Light-pulse experiments and long-term light treatments indicate the involvement of phytochrome in the light response. (v) While a small light effect possibly occurs in the root, a strong action of phytochrome was observed in the shoot. (vi) Photooxidative treatments of plastids led to a strong decrease of the NIR level and almost abolished the appearance of NIR transcripts. (vii) With plastids intact, application of nitrate (10 mM) caused the appearance of a considerable transcript level even in darkness. Light treatments in the presence of nitrate stimulated the transcript level further. (viii) Since a correlation between transcript level and rate of NIR increase was found it was concluded that in barley — in contrast to mustard, spinach and tobacco — NIR gene expression is controlled predominantly, if not exclusively, at the level of transcript accumulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198700
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  • 10
    Electronic Resource
    Electronic Resource
    A conditional-lethal molybdopterin-defective mutant of barley (1985)
    Springer
    Molecular genetics and genomics 201 (1985), S. 462-466 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The molybdenum cofactor of the barley mutant R9401 is not able to reconstitute NADPH nitrate reductase activity from extracts of the N. crassa nit-1 mutant nor is it able to effect dimerisation of the nitrate reductase subunits present in the R9401 mutant. Unphysiologically high levels of molybdate cannot restore nitrate reductase and xanthine dehydrogenase activity to mutant R9401 in vivo nor reactivate the Mo-co factor in vitro. The results indicate that the defect in mutant R9401 lies in the pathway leading to the formation of a functional molybdopterin moiety and that the same nuclear gene is involved in the synthesis of both shoot and root molybdenum cofactor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331340
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