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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 3091-3093 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic properties of 200 Å epitaxial Fe (001)/MgO (001) tiling are studied as a function of tile size and separation. For edge sizes above ∼3 μm, the individual tiles maintain the single domain behavior while below ∼3 μm the tiles break into domains due to demagnetizing effects. In addition, below an inter tile separation threshold of about 0.9 μm, a single tile magnetization switch provokes a reversal cascade in all the tiles; while, above this threshold, the individual tile's magnetization switches independently. In this last case, we have experimental access to the distribution of nucleation sites. Thus, we have found a clear signature of the magnetic interaction between patterned epitaxial micro tiles with in-plane magnetization. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 2039-2041 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The development of a versatile tool to quantify magnetic anisotropies in continuous and patterned magnetic thin films is reported. The technique involves measuring the magnetooptic response to a rotating magnetic field. Similarly to mechanical torque techniques, a single measurement obtains both the anisotropy constants and their symmetry axes distribution. The technique has been applied to analyze arrays of submicrometer stripe-shaped Fe (001) elements with different interelement separations (s). For s larger than 1 μm, the anisotropy associated with the stripes is independent on separation, with a value of the effective uniaxial anisotropy constant very consistent with theoretical estimations for these systems. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 23 (1984), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Streptococcus faecium strain 25 produced a bacteriocin (enterococcin Sf25), metabolized sucrose and contained three plasmids of 2.4, 4.7 and 13.0 MDa. Plasmids Sfp2.4 and Sfp4.7 were cotransferred in a filter mating procedure to sucrose negative and bacteriocin negative S. faecium strain M16. Strain M16 harboured a nonselftransferable plasmid Sfp 19.1 MDa, which was responsible for erythromycin resistance. Transcipient cells of S. faecium M16 contained the 19.1-MDa plasmid and plasmids Sfp2.4 and Sfp4.7, produced the enterococcin Sf25 and gained the ability to degrade sucrose.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 20 (1983), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Streptococcus faecium strain 3 produced a bacteriocin (enterococcin Sf3) and contained a homogeneous species of plasmid DNA (pJK3) with an Mr of 3.5 · 106. Plasmid pJK3 was transferable in a filter mating procedure to S. faecium M16. The non-bacteriocinogenic strain M16 was susceptible to enterococcin Sf3 and harboured a non-selftransferable 19.1 MDa plasmid, which was responsible for erythromycin resistance. Transcipient cells of S. faecium M16 contained the 19.1 MDa and the pJK3 plasmid, produced the enterococcin Sf3 and were resistant against the inhibitory action of this bacteriocin.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 11 (1981), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 103 (1984), S. 112-114 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Aus den Parallelen zur Bodenplatte L4 und Deckplatte S1 läßt sich mit dem Lot in den Wirbeleckpunkten ein lumbosakrales Trapez konstruieren, das genaue Meßdaten für Höhen und Krümmungsänderungen der unteren lumbalen Bewegungssegmente liefert. Die klinisch bedeutsamen Höhenminderungen im dorsalen Abschnitt der Segmente L4/5 and L5/S1 mit Verstärkung der Lendenlordose sowie deren therapeutische Aufrichtung durch konservative bzw. operative Maßnahmen lassen sich damit genau aufzeichnen.
    Notes: Summary A lumbosacral trapezium can be constructed using the parallels to the lower plate L4 and the upper plate S1 and two perpendiculars to the former; it yields exact measurement data for changes in height and curvature in the lower lumbar motion segments. The clinically relevant reductions in height in the dorsal part of the segments L4-5 and L5-S1, the increase in lumbar lordosis, and therapeutic straightening by means of conservative or operative treatment can thus be plotted exactly.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 103 (1984), S. 107-111 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Um neben der Fixation auch eine Dekompression im dorsalen Anteil der unteren beiden lumbalen Bewegungssegmente zu erreichen, ergänzen wir die posterolaterale Fusion durch eine mediale interspinale Distraktionsspondylodese. Ein genau vermessener kortikospongiöser Span aus der Spina iliaca posterior wird unter Distraktion bei maximaler Kyphosierung der LWS ohne alloplastisches Osteosynthesematerial zwischen die Dornfortsätze L4 und S1 geklemmt. Der Span soll die Distraktion bis zum Festwerden der posterolateralen Knochenstraßen aufrechthalten. Außerdem wird damit eine dritte Fusionsstrecke geschaffen. Indikation, Technik und postoperatives Vorgehen werden beschrieben. Distraktionsergebnis und -beständigkeit werden mit einem standardisierten Meßverfahren für die Bewegungssegmente L4 bis S1 überprüft.
    Notes: Summary We supplement posterolateral fusion with medial interspinal distraction spondylodesis to attain decompression in addition to fixation in the dorsal part of the two lower lumbar motion segments. An exactly fitted corticospongiosa bone graft from the spina iliaca posterior is wedged between the spinal processes L4 and S1 under distraction with maximal kyphosis of the lumbar spine; metallic implants are not used. The graft maintains the distraction until the posterolateral fusion band is fixed. Furthermore, a third fusion band is thus made. Indication, technique, and postoperative treatment are described. The outcome and durability of the distraction are checked with a standardized measurement procedure for motion segments L4 to S1.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1920
    Keywords: Cerebral angiography ; Internal carotid artery ; Cavernous sinus ; Cerebral aneurysm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In order to obtain frames of reference to determine the place of intersection of the carotid siphon with the dura mater in conventional arteriograms, a debated topic lacking general agreement in the literature, 34 cadaveric sphenoids were prepared with the injection of radiopaque medium in both internal carotid arteries. After having marked the dura mater with steel wire, the pieces were radiographed in lateral view. The points of intersection of the clinoclinoid line and the sphenoidal line with the internal carotid artery as well as the emergence of the ophthalmic artery and its posterior projection were marked on the radiographs obtained. The distances between the various points were measured and submitted to statistical treatment. The results showed multiple regressions with a strong correlation coefficient in two equations. A table was built in which, knowing the distances between the points of the clinoclinoid and the sphenoidal plane lines and those of the ophthalmic artery and its projection, the position of the dura mater which covers the cavernous sinus may be estimated in arteriograms.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Kardiologie 89 (2000), S. 747-753 
    ISSN: 1435-1285
    Keywords: Key words Renal artery disease – coronary artery disease –¶renal artery stenting –¶arteriosclerosis ; Schlüsselwörter¶Renovaskuläre Erkrankung –¶Ischämische Nephropathie –¶Koronare Herzerkrankung –¶Renale Stentimplantation –¶Arteriosklerose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An 609 Patienten mit Verdacht auf koronare Herzerkrankung (KHK) wurden die Verteilung und der Schweregrad einer begleitenden renovaskulären Erkrankung (RE) untersucht. 152 dieser Patienten (25%) waren von einer RE betroffen. Unter den 399 Patienten mit signifikanten Koronarstenosen (〉50%) fanden sich 143 mit renovaskulärer Beteiligung (35,8%). Geringgradige Veränderungen (20–40% Stenose) stellten sich hierbei in 12,5%, mittelgradige (40–60% Stenose) in 10,5% und höhergradige (〉60% Stenose) in 12,8% der Patienten dar. In allen drei Gruppen zeigte sich signifikant häufiger eine 3-Gefäßerkrankung (GE) als eine 1- oder 2-GE (p〈0,01). Der Effekt einer perkutanen Revaskularisation auf Blutdruck und exkretorischen Nierenfunktion wird für höhergradige Stenosen in der Literatur uneinheitlich bewertet. Bei den 51 Patienten mit Stenose 〉60% führte eine Stentimplantation zu einer signifikanten Reduktion der Blutdruckwerte von 163±30 auf 145±17 mmHg systolisch und von 93±18 auf 83±10 mmHg diastolisch (p=0,008), sowie zur Abnahme der antihypertensiven Medikation (3,2±0,9 auf 2,8±1,0; p=0,005). Die Serumkreatininkonzentration verringerte sich nicht signifikant von 1,46±0,70 auf 1,39±0,58 mg/dl. Die Verteilung der Schweregrade einer RE in einem großen kardiologischen Patientengut liegt jeweils bei ca. 1/3 für gering-, mittel- und höhergradige Nierenarterienstenosen und geht in jeder dieser Gruppen mit einer progredienten KHK einher. Dabei können höhergradige Nierenarterienstenosen durch eine elektive Stentimplantation sicher und blutdruckeffektiv revaskularisiert werden.
    Notes: Summary To explore the relationship between coronary artery disease and renal vascular disease, we performed renal arterial angiography in 609 patients undergoing coronary angiography for suspected coronary artery disease. We defined renal artery stenosis as nonsignificant (〈40%), borderline (40–60%) and significant (〉60%). One-hundred fifty-two patients had renal artery stenosis, while 457 did not. Two-hundred and ten patients had no coronary disease; of these, only 9 had renal artery stenosis. On the other hand, the 143 patients with renal artery stenosis, when subdivided, had similar degrees of coronary disease; three vessel disease was significantly more common than one or two vessel disease in all groups. Renal artery stenosis of all severity degrees was associated with common atherosclerotic risk factors. However, hypertension was not a clue to the presence of renal artery stenosis. To evaluate the effect of percutaneous revascularization on hypertension and renal function all 51 patients with significant renal artery stenosis were treated by primary stent implantation and were follwed up for 6 months. Stent implantation showed a marked decrease in systolic and diastolic blood pressure (163±30 to 145±17 and 93±18 to 83±10 mmHg; p=0.008) with a decrease in the amount of antihypertensive medication but without beneficial effect on serum creatinine during follow-up (1.46±0.70 mg/dl to 1.39±0.58 mg/dl, p=ns). We conclude that renal artery stenosis of any severity is strongly suggestive of three vessel coronary artery disease. The fact that renal stenting lowers blood pressure decreases antihypertensive drugs and increases medication flexibility in patients with coronary artery disease would support the notion of revascularization in patients with significant stenoses.
    Type of Medium: Electronic Resource
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