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  • 1
    Electronic Resource
    Electronic Resource
    Isolation and nucleotide sequence of the 5-aminolevulinate synthase gene from Aspergillus nidulans (1993)
    Springer
    Current genetics 23 (1993), S. 501-507 
    Details
    ISSN: 1432-0983
    Keywords: 5-aminolevulinate synthase ; Aspergillus ; Haem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The structural gene for 5-aminolevulinate (ALA) synthase has been cloned and sequenced from the filamentous fungus Aspergillus nidulans using an oligonucleotide probe based on a highly conserved-amino-acid sequence found in ALA synthase genes of a wide range of species. The cloned gene, hemA, has a 5′ untranslated mRNA of 92 nucleotides (nt) and one intron (64 nt). The deduced protein sequence (648 amino acids) shows 64% identity to the yeast ALA synthase in the C-terminal region of 453 amino acids. The N-terminal region is typical of ALA synthase proteins in that the specific amino-acid sequence is not conserved but consists of a “leader” region rich in basic amino acids, believed to be involved in mitochondrial targeting, followed by a stretch of largely hydrophobic residues which may allow interaction with the inner mitochondrial membrane. Under the conditions used the transcription of hemA was unaffected by dextrose repression, heat shock, or oxygen levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00312642
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  • 2
    Electronic Resource
    Electronic Resource
    The structure of the incommensurate modulated phase of NaNO2 (1984)
    Springer
    The European physical journal 56 (1984), S. 229-239 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The incommensurate phase of NaNO2 is known to contain a transverse displacement modulation in addition to the modulated ferroelectric ordering, but the phase and sign of the displacement was left undetermined by the X-ray structural analysis. We discuss the phase, sign and magnitude of the displacement modulation from several points of view and build up a more detailed picture of its origin than previously. Rigorous group theoretical arguments fix the phase as zero, in contrast to the assumption of some workers, and indicate other possible aspects of the structure. The sign of the displacement is found to be positive due to the dominance of electrostatic forces and O−O repulsion over O−Na repulsion. The magnitude of the displacement seen in molecular dynamics simulations and estimated from simple atom packing agree reasonably with the X-ray value. The results confirm the displacement modulation as the essential ingredient responsible for the existence of the incommensurate phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304176
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  • 3
    Electronic Resource
    Electronic Resource
    Cochannel interference estimation for M-ary PSK modulated signals (1994)
    Springer
    Wireless personal communications 1 (1994), S. 23-32 
    Details
    ISSN: 1572-834X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Although the signal-to-interference power ratio (SIR) based criterion for diversity reception has been highlighted in the literature as the most effective method for reducing the effects of cochannel interference, it is often not clear how to measure this parameter in a practical context. This work addresses the problem of finding a way to determine the level of interference (due to frequency reuse) from neighbouring cells in a mobile telephone system, with M-ary PSK modulated signals and fast fading channel. The proposed parameter measures the quality of the received signal corrupted by additive white noise and cochannel interference, for any number of interferers. It is also suitable for high bit rate transmission, as in indoor mobile radio systems, since the proposed method requires sampling the received signal at just one sample/symbol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01098502
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  • 4
    Electronic Resource
    Electronic Resource
    On cross-correlation function evaluation from a periodically time-varying digital filter's output (1998)
    Springer
    Circuits, systems and signal processing 17 (1998), S. 495-515 
    Details
    ISSN: 1531-5878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Concise mathematical models are established for one-dimensional, linear, periodically time-varying digital filters. The three representations considered include linear difference equations, Green's function, and state-space structures. Linear time-invariant equivalent descriptions are then formulated, and from these, for the particular case of a white noise input, various analytical expressions are derived for both the cross-power spectral density functions and cross-correlation functions of the filter's subsampled output. These results are compared and contrasted with similar formulas for a linear time-invariant system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201505
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  • 5
    Electronic Resource
    Electronic Resource
    Modification of galvannealed steel through aluminum addition (1998)
    Springer
    Hyperfine interactions 111 (1998), S. 205-209 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Aluminum is believed to modify and to some extent control the coating characteristics of commercially produced galvanneal sheet steel. These include mechanical, chemical, and aesthetic properties. Whereas the aluminum added to the molten zinc bath is known to form intermetallics before the steel is annealed, our research is primarily concerned with the effect aluminum has on suppression or enhancement of the particular iron--zinc alloy phases in the coating during galvannealing. The microstructure of four commercially important iron--zinc intermetallic phases containing varying aluminum content between 0--1.5 weight percent has been studied. It is also believed that an iron--aluminum alloy, known as the inhibition layer, forms on the steel surface following hot dipping and prior to annealing. Transmission and scattering Mössbauer spectroscopy as well as X-ray diffraction have been used to identify iron--zinc and iron--aluminum alloys present in the coatings. Discussion will be presented on the effect aluminum has on phase suppression for Fe--Zn alloys prepared in commercially produced galvanneal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012657801791
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  • 6
    Electronic Resource
    Electronic Resource
    In-situ identification of iron--zinc intermetallics in galvannealed steel coatings and iron oxides on exposed steel (1998)
    Springer
    Hyperfine interactions 111 (1998), S. 71-82 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Identification of all the compounds present in various coatings on steels is particularly difficult. Non-destructive, in-situ analysis is necessary if the fraction of each compound as well as its probable layering within the coating, is to be determined. Mössbauer spectroscopy is one valuable probe capable of uniquely identifying all iron compounds which form as coatings on steel and other iron alloy surfaces. To investigate a complete coating several criteria need to be considered. Removing the coating inevitably leaves a small and perhaps important component intact on the substrate. Therefore investigating the coating as it remains intact on the steel is important if complete identification of the iron compounds is to be made. This also preserves crystalline texture or preferred growth orientation within the coating to which the Mössbauer effect is sensitive. Mössbauer spectroscopy is a non-destructive technique which allows the integrity of the coating to be maintained during analysis. The combined transmission and scattering Mössbauer geometries generally result in accurate analysis of the coating composition. For the scattering geometry added information on compound layering is obtained if separate Mössbauer spectra are recorded using the re-emitted gamma rays as well as the conversion electrons and subsequently emitted X-rays. In-situ scattering Mössbauer spectroscopy has been used to characterize the iron--zinc alloys which form in the coatings of commercially produced corrosion resistant galvannealed sheet steel, a product of great interest to automotive producers. The results show that different amounts of four iron--zinc phases are present depending on the production conditions of the coating. The different phases are also distinctly layered. Mössbauer analyses of corrosion coatings formed on the surface of steels which have been exposed to different environments has also been undertaken. Materials include structural steels exposed for up to 25 years in marine, rural and industrial environments, and the interior surfaces of boiler pipes subjected to adverse chemical and temperature environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012629028199
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  • 7
    Electronic Resource
    Electronic Resource
    Cloning and characterisation of the cytochrome c gene of Aspergillus nidulans (1994)
    Springer
    Molecular genetics and genomics 242 (1994), S. 17-22 
    Details
    ISSN: 1617-4623
    Keywords: Cytochrome c ; Aspergillus ; Transcription ; Intron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cytochrome c gene (cycA) of the filamentous fungus Aspergillus nidulans has been isolated and sequenced. The gene is present in a single copy per haploid genome and encodes a polypeptide of 112 amino acid residues. The nucleotide sequence of the A. nidulans cycA gene shows 87% identity to the DNA sequence of the Neurospora crassa cytochrome c gene, and approximately 72% identity to the sequence of the Saccharomyces cerevisiae iso-1-cytochrome c gene (CYC1). The S. cerevisiae CYC1 gene was used as a heterologous probe to isolate the homologous gene in A. nidulans. The A. nidulans cytochrome c sequence contains two small introns. One of these is highly conserved in terms of position, but the other has not been reported in any of the cytochrome c genes so far sequenced. Expression of the cycA gene is not affected by glucose repression, but has been shown to be induced approximatly tenfold in the presence of oxygen and three- to fourfold under heatshock conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00277343
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  • 8
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    Empathy and well-being correlate with centrality in different social networks (2017)
    National Academy of Sciences
    Details
    Publication Date: 2017-08-29
    Description: Individuals benefit from occupying central roles in social networks, but little is known about the psychological traits that predict centrality. Across four college freshman dorms (n = 193), we characterized individuals with a battery of personality questionnaires and also asked them to nominate dorm members with whom they had different types of relationships. This revealed several social networks within dorm communities with differing characteristics. In particular, additional data showed that networks varied in the degree to which nominations depend on (i) trust and (ii) shared fun and excitement. Networks more dependent upon trust were further defined by fewer connections than those more dependent on fun. Crucially, network and personality features interacted to predict individuals’ centrality: people high in well-being (i.e., life satisfaction and positive emotion) were central to networks characterized by fun, whereas people high in empathy were central to networks characterized by trust. Together, these findings provide network-based corroboration of psychological evidence that well-being is socially attractive, whereas empathy supports close relationships. More broadly, these data highlight how an individual’s personality relates to the roles that they play in sustaining their community.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    Glassy Dislocation Dynamics in 2D Colloidal Dimer Crystals (2010)
    American Physical Society
    Details
    Publication Date: 2010-08-09
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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  • 10
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    Enhancing Rotational Diffusion Using Oscillatory Shear (2013)
    American Physical Society
    Details
    Publication Date: 2013-05-29
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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