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  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 2779-2781 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Generation of pure, metal-vapor plasmas with peak densities above 1019 cm−3 is reported. The plasma production is based on the explosive ablation of electrode material in the capillary μs discharge. The plasma density is controlled by varying the discharge parameters. High purity and density were achieved by optimizing the electrode configuration, the capillary material, and dimensions. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Arthroskopie 12 (1999), S. 74-78 
    ISSN: 1434-3924
    Keywords: Schlüsselwörter Transforaminale endoskopische Bandscheibenoperation ; Bandscheibenvorfall ; Foraminoskopie ; Key words Transforaminal endoscopic spinal disc surgery ; Spinal disc herniation ; Foraminoscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Transforaminal endoscopic spinal disc surgery is one of the newer minimal invasive percutaneous procedures for treatment of lumbar disc hernias. Both non-sequestered and sequestered hernias can be treated with this method. From January 1995 to December 1997 we conducted endoscopic discotomies in levels L3 to S1 in 80 patients. The patients were chosen according to strict indications. Initially local anesthesia was administered; as the learning curve grew spinal anesthesia was used. The results show that this method is effective and pathology targeted. Healthy tissue is conserved and the risk of postoperative fibrosis is low.
    Notes: Die endoskopische Bandscheibenoperation durch das Neuroforamen stellt eine der neueren minimalinvasiven, perkutanen Techniken in der operativen Therapie der lumbalen Bandscheibenvorfälle dar. Sowohl nichtsequestrierte als auch sequestrierte Bandscheibenvorfälle sind mit diesem Verfahren therapierbar. Von Januar 1995– Dezember 1997 wurde eine endoskopische Diskotomie an 80 Patienten in den Etagen L3–S1 ausgeführt. Die Patienten wurden anhand von bestimmten Ein- und Ausschlußkriterien sorgfältig ausgesucht. Die Eingriffe erfolgten anfänglich in Lokalanästhesie, mit zunehmender Erfahrung in Spinalanästhesie. Die bisher vorliegenden Ergebnisse sprechen für eine suffiziente, pathologiegezielte Prolapsbehandlung mit weitgehender Erhaltung der Restbandscheibe und geringerer postoperativer Fibrosierung.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0630
    Keywords: PACS: 32.30Jc; 42.62Be; 42.62Fi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. The technique of laser ablation is receiving increasing attention for applications in dentistry, specifically for the treatment of teeth (e.g. drilling of micro-holes and plaque removal). In the process of ablation a luminous micro-plasma is normally generated which may be exploited for elemental analysis. Here we report on quantitative Laser-Induced Breakdown Spectroscopy (LIBS) analysis to study the presence of trace minerals in teeth. A selection of teeth of different age groups has been investigated, ranging from the first teeth of infants, through the second teeth of children, to adults to trace the influence of environmental factors on the accumulation of a number of elements in teeth. We found a close link between elements detected in tooth fillings and toothpastes with those present in teeth.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Environmental geochemistry and health 19 (1997), S. 63-66 
    ISSN: 1573-2983
    Keywords: Water ; stream sediments ; heavy metals ; cadmium ; chromium ; copper ; mercury ; nickel ; lead ; zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Medicine
    Notes: Abstract The levels of heavy metals in water and stream sediments in Jamaica are presented and compared to levels in soils and environmental standards. Heavy metals (cadmium, chromium, copper, mercury, nickel, lead and zinc) appear to be less of a problem to Jamaica's freshwater environment than might be expected given the concentrations in soils. This can be explained by taking into account the dynamics of the Jamaican water environment and the relative absence of anthropogenic sources. The dynamics of the freshwater system on the other hand, could pass any environmental threat to the coastal environment. Because the stream sediments are relatively coarse and contain little organic material the bio-availability of micropollutants such as heavy metals from the sediments can be expected to be relatively high.
    Type of Medium: Electronic Resource
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