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  • 1
    Electronic Resource
    Electronic Resource
    Observation of single-ion magnon bound states in the metamagnet FeI2 (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 5085-5087 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The results of electron spin resonance measurements at high frequencies are reported on the antiferromagnet FeI2 with strong uniaxial anisotropy. We have found new signals whose g value is 16.5 together with the signal with g=7.0 reported before [Fert et al., Solid State Commun. 26, 693 (1978)]. We interpret these electric spin resonance signals as originating from single-ion four magnon and two magnon bound states, respectively. Some of the exchange interaction constants are determined from the analysis of the results. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.373256
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  • 2
    Electronic Resource
    Electronic Resource
    In situ x-ray topography of silicon carbide during crystal growth by sublimation method (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 2829-2832 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have developed an instrument for real-time observation of silicon carbide (SiC) crystal during the sublimation growth process by x-ray topography. It is constructed by combining an x-ray goniometer and a crystal-growth chamber. The vertical goniometer consists of three circles, an α circle for the x-ray source, a β circle for the detector, and a cursive-phi circle for the azimuthal rotation of the sample. The growing crystal boule is set at the center of the goniometer glued on a crucible lid. Transmission topographs are taken using an asymmetric (101¯1) reflection with the scattering angle 2θB=β−α from the (0001)-oriented boule. A rotating-anode 18 kW generator with a molybdenum target is employed as the x-ray source. Topographs are observed by a direct imaging system using a charge-coupled device camera. Incident and scattered x-ray beams pass through beryllium windows mounted on the bottom and top flanges of the crystal-growth chamber, respectively. The crucibles are also designed for in situ measurements so that the x-ray beam path is separated from the source materials. The in situ topographs demonstrated the movement of micropipes and other defects during the crystal growth. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1150698
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of B and C on the ordering of L10-CoPt thin films (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2001-2003 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have investigated the effects of B and C on the ordering of L10-CoPt films and confirmed the following quite different role between B and C in CoPt. A small amount of B considerably decreases the temperature for ordering and is interstitially incorporated into L10-CoPt along its c axis due to the large negative heat of solutions with Co and Pt. X-ray photoelectron spectroscopy analyses have revealed that B atoms combine with Co and Pt. In contrast, C is not incorporated into the CoPt lattice due to its positive heat of solution, resulting in no decrease in the ordering temperature. The present results reveal that CoPt films containing a small amount of B are promising for high density recording media. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1408605
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  • 4
    Electronic Resource
    Electronic Resource
    Two-dimensional growth of InSb thin films on GaAs(111)A substrates (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 589-591 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Heteroepitaxy of high-quality InSb films was performed directly on GaAs surfaces by using molecular beam epitaxy. Despite the 14.6% lattice mismatch, two-dimensionally grown InSb on GaAs(111)A substrates were obtained from the initial stage, but not on (001) substrates. A conductive layer was formed from the early stage of the growth on the (111)A surface, and the mobilities and carrier concentrations of InSb on (111)A substrates suggested a low defect density due to confinement of the dislocations to the interface. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125826
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  • 5
    Electronic Resource
    Electronic Resource
    Comparison between in vivo and in vitro chemokine production in Helicobacter pylori infection (2000)
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 14 (2000), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Enhanced gastric mucosal chemokine activity has been demonstrated in patients with Helicobacter pylori infection. However, little is known about the mechanisms involved in this phenomenon. Aim: To examine whether in vivo chemokine activity is similar to in vitro response of gastric epithelial cells infected by H. pylori. Patients and Methods: Antral biopsy specimens were obtained from patients with H. pylori infection for organ culture, isolation of H. pylori and histological examination. Results: In organ cultures of mucosal tissues, the levels of interleukin-8 and growth-related gene product α were elevated in patients with peptic ulcer disease compared with those with erosive gastritis or endoscopically normal mucosa. However, there were no significant differences in in vitro cultures of MKN45 or KATO III cells that were infected with H. pylori isolated from these same patients. These in vivo and in vitroα-chemokine levels showed no significant association with the presence of cagA gene and CagA protein, ureB genotype, or binding capacity to MKN45 or KATO III cells in individual H. pylori isolates. In contrast, in vivo mucosal α-chemokine activity correlated with H. pylori colonization density. Conclusion: Mucosal chemokine profiles and inflammatory responses in H. pylori infection may be associated more closely with host factors, including those determining bacterial adhesiveness, than with differences in H. pylori strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2000.014s1205.x
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  • 6
    Electronic Resource
    Electronic Resource
    Microboudin structures of piemontite along the Sambagawa metamorphic belt, Japan: implications for lateral variation of differential stress during regional metamorphism (2004)
    Oxford, UK : Blackwell Science Inc
    Journal of metamorphic geology 22 (2004), S. 0 
    Details
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Evidence is presented of a lateral variation in differential stress during metamorphism along a regional metamorphic belt on the basis of the proportion of microboudinaged piemontite grains (p) in a quartz matrix in metacherts. It is proposed that p is a practical indicator of relative differential stress. Analysis of 123 metacherts from the 800 km long Sambagawa metamorphic belt, Japan, reveals that p-values range from 〈 0.01 to 0.7 in this region. Most samples from Wakayama in the mid-belt area have p-values of 0.4–0.6, whereas those from western Shikoku have p-values of 〈 0.1. This difference cannot be explained by variations in metamorphic temperature, and is instead attributed to a regional, lateral variation in differential stress during metamorphism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1525-1314.2004.00507.x
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  • 7
    Electronic Resource
    Electronic Resource
    The management of pelvic chondrosarcoma in Japan (2000)
    Springer
    International orthopaedics 24 (2000), S. 65-70 
    Details
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Une étude sur 135 patients atteints de chondrosarcome pelvien, qui ont été traités dans 58 établissements médicaux de tout le Japon au cours des dix dernières années, a été effectuée. Parmi eux, 14 patients ont subi une opération mutilante, et 121 un sauvetage du membre. Des marges chirurgicales ont été réalisées sous la forme ”intralésion” pour 27 patients, ”marginale” pour 30, ”large” pour 77 et ”équivoque” pour 1. Une récidive locale est apparue chez 33 patients, et des métastases chez 25. Une infection post-opératoire est apparue chez 25 patients. L’opération a été refaite sur 10 patients. Le résultat oncologique a été”non malade” pour 92 patients, ”vivant mais malade” pour 17 et ”mort de la maladie” pour 26. Le taux de survie cumulatif prospectif pour 10 ans a été de 65% pour l’ensemble des patients. 6 facteurs déterminant le résultat se sont révélés statistiquement: stade chirurgical, site de la tumeur, taille de la tumeur, marge chirurgicale, fonction des patients et niveau d’activité. L’excision de la tumeur avec une marge large ou avec une marge large avec zone marginale partielle, et la reconstruction stable s’avèrent essentielles pour améliorer le résultat du traitement du chondrosarcome pelvien.
    Notes: Abstract  A review of 135 patients with pelvic chondrosarcoma who had been treated at 58 institutions in Japan between 1989 and 1998. In this series ablative surgery was necessary in 14 patients, and a limb salvage procedure performed in 121 patients. The surgical margins were ”intra-lesional” in 27 patients, ”marginal” in 30, ”wide” in 77 and ”unspecified” in 1. Local recurrence occurred in 33 patients and distant metastases in 25. Post-operative infection occurred in 25 patients. Revision was performed in 10 patients. The oncological outcome was ”disease free” in 92 patients, ”alive with disease” in 17 and ”dead because of the disease” in 26. The cumulative prospective 10-year survival rate for all patients was 65%. The 6 statistically significant prognostic factors that determined the outcome were: – surgical stage, site of tumour, size of tumour, surgical margin, functional mobility and activity level after surgery. Excision of the tumour with a wide margin, or with a wide margin with partly marginal areas, and subsequent stable reconstruction are essential for improving the results of pelvic chondrosarcoma treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002640000118
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  • 8
    Electronic Resource
    Electronic Resource
    Selective Toxicity of Mikamycins, Inhibitors of Protein Synthesis (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 499-501 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The bacteriostatic activity of mikamycin A is markedly enhanced by the addition of mikamycin B. The same synergism of mikamycins A and B is observed in the inhibition of 14C-amino-acids incorporation into protein. Recently, Rendi and Ochoa15'16 demonstrated by using the cell-free system that ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201499a0
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  • 9
    Electronic Resource
    Electronic Resource
    Age-related plaque morphology and C-terminal heterogeneity of amyloid β in Dutch-type hereditary cerebral hemorrhage with amyloidosis (2000)
    Springer
    Acta neuropathologica 99 (2000), S. 409-419 
    Details
    ISSN: 1432-0533
    Keywords: Key words Amyloid β ; Cerebral amyloid angiopathy ; Hereditary cerebral hemorrhage with amyloidosis-Dutch type ; Senile plaques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The evolvement of amyloid β (Aβ) deposition in the frontal cerebral cortex of 24 patients of increasing age with Dutch-type hereditary cerebral hemorrhage with amyloidosis (HCHWA-D) was studied using end-specific monoclonal antibodies to Aβx-42 (Aβ42) or Aβx-40 (Aβ40) and markers for degenerating neurites. Aβ42 immunostaining revealed parenchymal Aβ deposits with a heterogeneous morphology and distribution, i.e., clouds, fine/dense diffuse, coarse, and homogeneous plaques. Clouds and diffuse plaques were associated with glial Aβ granules. Aβ40 labeling was absent in clouds/fine diffuse plaques, inconsistent and variably intense in dense diffuse/¶coarse plaques and consistent in homogeneous plaques. In a subset of Aβ40-positive plaques, degenerating neurites – without tauopathy – and/or amyloid cores were observed. Electron microscopy revealed no apparent amyloid fibrils in fine diffuse plaques, small bundles of fibrils in dense diffuse/homogeneous plaques, and amyloid masses in coarse plaques. The parenchymal Aβ pathology was age-related: the ratio of fine to dense diffuse plaques decreased with age, clouds were limited to younger patients; coarse plaques to the oldest old. Homogeneous/cored plaques were present most consistently in older patients. Plaque density did not increase with age. Vascular Aβ deposits stained for both Aβ species, but exclusively Aβ42-positive, presumably recent deposits were also observed. This study suggests that HCHWA-D is a model of plaque evolution in which clouds leave fine diffuse plaques, which may become dense diffuse and ultimately coarse or homogeneous plaques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004010051143
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  • 10
    Electronic Resource
    Electronic Resource
    X-ray fluorescence analysis of trace metal ions following a preconcentration of metal-diethyldithiocarbamate complexes by homogeneous liquid-liquid extraction (2000)
    Springer
    Fresenius' journal of analytical chemistry 368 (2000), S. 607-610 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A homogeneous liquid-liquid extraction method for 36 metal ions with diethyldithiocarbamate was studied. As a result, 11 metal ions were extracted as metal-chelates. Under the experimental conditions, the maximum concentration factor was 500 (i.e., 0.1 mL of sedimented liquid phase was produced from 50 mL of aqueous phase). Moreover, the proposed method was utilized as a preconcentration method for X-ray fluorescence analysis of these metals. The recovery of each metal was ca. 97–100%. All calibration curves were linear over the range of 5.0 × 10–7 mol L–1 to 1.0 × 10–5 mol L–1. The detection limits were at the ¶10–8 mol L–1 levels and the relative standard deviations were below 5% (5 determinations). When the proposed method was used for the determination of contaminants in a synthetic sample (Al-based alloy model) and of components in an Au-Pd alloy, the results were satisfactory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160000538
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