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  • 11
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 6166-6168 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have fabricated ultrathin Co particles with various shapes, variable thicknesses δ (2 ML〈δ〈22 ML), and lateral size L ranging from 100 μm to (approximate)100 nm. We find that all particles are magnetized in-plane at room temperature and are in a single domain state, independently of shape and size—with some remarkable exceptions. We also find that the magnetic state of a particle can be manipulated without influencing the state of the neighbors. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 1273-1275 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Atomically resolved cross-sectional scanning tunneling microscope topographic images of heterostructures that include a sequence of 1, 2, 5, and 10 nm AlGaAs and GaAs layers are presented. These layers clearly show alloy fluctuations and interface roughness on an atomic scale. In the thick AlGaAs layers a mottled structure with regions of higher Al content about 2 nm wide and elongated in [1¯12] or [11¯2] directions are observed. Similarly, the interfaces are rough on a 2 nm length scale. These results suggest that, for the conditions used for the epitaxial growth of the ternary layers, Al-rich regions nucleate and grow anisotropically.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biosystems 28 (1992), S. 69-73 
    ISSN: 0303-2647
    Keywords: Chlorarachnion reptans ; Cryptophyta ; Genomes ; Nucleomorph ; Pyrenomonas salina
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 127 (1993), S. 1077-1082 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 260 (1998), S. 207-211 
    ISSN: 1617-4623
    Keywords: Key words FtsZ ; Chloroplast division ; Cryptomonad ; Nucleomorph ; Subcellular localization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Guillardia theta is a cryptomonad alga, whose phototrophic symbiont was acquired by secondary endocytobiosis. The nucleomorph, the vestigial nucleus of the eukaryotic endosymbiont, harbors three linear chromosomes with a total coding capacity of 515 kb. Sequencing of the nucleomorph genome reveals that it encodes an ORF homologous to the bacterial cell division protein FtsZ, supporting the hypothesis that FtsZ is common in chloroplasts. We show that the nucleomorph-encoded ftsZ gene is transcribed. The transcript is polyadenylated and therefore shows features typical of eukaryotic transcripts. However, 3′ processing of nucleomorph mRNA is inaccurate. Transcripts of nucleomorph genes in G. theta overlap with neighboring UTRs and coding regions. We demonstrate that the reading frame encoding NmFtsZ is not interrupted by introns. Subcellular localization of the protein reveals that FtsZ is localized exclusively in the chloroplast of G. theta, demonstrating that FtsZ is imported into the organelle.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 378 (1995), S. 597-600 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We grow epitaxial Fe films at room temperature on top of a non-magnetic single-crystal W(110) surface. Pressure in the vacuum chamber during growth does not exceed 2 x 1010 mbar. In the ferromagnetically ordered phase, the films have a uniaxial easy magnetization axis along the in-plane [110] ...
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1432-0983
    Keywords: Chlorarachniophyta ; Cryptophyta ; Nucleomorph ; HSP 70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cryptomonad algae and Chlorarachiniophyta are evolutionary chimaeras derived from the engulfment of an eukaryotic phototrophic endosymbiont by a eukaryotic host cell. Although much reduced, the endosymbiont's eukaryotic plasmatic compartment still contains a nucleus, the so-called nucleomorph. These nucleomorphs carry the smallest known eukaryotic genomes. We have characterized the genomes of several cryptomonads and a Chlorarachnion species by means of PFGE (pulsed-field gel electrophoresis). Hybridization studies with small subunit rDNA were used to identify the nucleomorph chromosomes. We also performed hybridization experiments with an hsp70 probe to estimate the distribution of this gene among the different algal species. The evolutionary, genetical, and physiological implications of our studies are discussed. A model on the possible function of the nucleomorph hsp70 gene products is presented.
    Type of Medium: Electronic Resource
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  • 19
    ISSN: 1433-044X
    Keywords: Key words Supraspinatus outlet syndrome ; computed tomography ; 3D reconstruction ; shoulder ; acromion ; Schlüsselwörter Supraspinatus-outlet-Syndrom • CT • 3D-Rekonstruktion • Schulter • Akromion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Eine mechanische Irritation der Supraspinatussehne aufgrund einer Einengung des subakromialen Raumes wird als mögliche Ursache des Supraspinatus-outlet-Syndroms angesehen. Ziel der vorliegenden Studie war die Entwicklung einer Methode zur verbesserten räumlichen Messung akromiohumeraler Distanzen und zur Beurteilung der Akromionform in der dreidimensional rekonstruierten Computertomographie (CT). An 7 Patienten mit einseitigem Supraspinatus-outlet-Syndrom wurde das Akromion und der subakromiale Raum aus hochauflösenden CT-Schnitten dreidimensional (3D-) rekonstruiert. Die akromiohumerale Distanz wurde in 3 rekonstruierten Frontalschnitten gemessen und auf der gesunden und erkrankten Seite verglichen. Die Akromionform wurde der Klassifikation nach Bigliani im konventionellen Röntgenbild gegenübergestellt. Die akromiohumerale Distanz war an der betroffenen Schulter nicht signifikant kleiner als auf der gesunden Seite. In 5 Fällen konnte die Klassifikation der Akromionform im Röntgenbild in der 3D-CT bestätigt werden, in 2 Fällen ergab sich eine abweichende Beurteilung. Die Ergebnisse legen nahe, daß mit der 3D-CT eine verbesserte Beurteilung der Akromionform und der akromiohumeralen Distanz möglich ist.
    Notes: Summary Mechanical irritations of the supraspinatus tendon due to a reduction of the subacromial space are considered to be a potential cause of supraspinatus outlet syndrome. The aim of the current study was, therefore, to provide a method of improved measurement of the acromiohumeral distance and the evaluation of the acromial shape. In seven patients aged 50–60 years with unilateral supraspinatus outlet syndrome, imaging with standardized, high-resolution computed tomography (CT) was performed in order to demonstrate the acromion and the subacromial space three-dimensionally. The acromiohumeral distance was measured in three reconstructed frontal sections, and the two sides of each patient were directly compared. The acromial shape was compared with the classification of Bigliani as derived from conventional radiography. Whereas the Constant Score was found to be significantly reduced in the diseased shoulders (p 〈 0.01), the acromiohumeral distance was not significantly lower in three standardized frontal sections. In five cases the classification of the acromial form from the conventional radiograph was confirmed by 3D CT, whereas in two cases it was shown to be different. Our results suggest that primary or secondary changes of the acromial form can be more accurately evaluated with 3D CT than with conventional radiography. A direct comparison of the two sides in patients with supraspinatus syndrome does not suggest a reduction of acromiohumeral distance in the diseased shoulder.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 82 (1995), S. 573-575 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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