Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1995-1999  (4)
  • 1997  (4)
Material
Years
  • 1995-1999  (4)
Year
  • 1
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Kostomuksha greenstone belt consists of two lithotectonic terranes, one mafic igneous and the other sedimentary, separated by a major shear zone. The former contains submarine 2.8 Gyr old komatiite-basalt lavas and volcaniclastic lithologies with trace element and isotopic compositions resembling those of recent oceanic flood basalts [ɛNd(T) =+ 2,8, μ.1= 8.73 (Nb/Th)N= 1.5–2.1 (Nb/La)N= 1.0–1.5]. We suggest that the mafic terrane is a remnant of the upper crustal part of an Archaean oceanic plateau derived from partial melting of a mantle plume head. When the plateau reached the continental margin, it collided with the sedimentary terrane but was too buoyant to subduct. As a result, the volcanic section of the plateau was imbricated and obducted thus becoming a new piece of continental crust. The deeper zones were subducted and disappeared from the geological record.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 385 (1997), S. 219-229 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Basaltic volcanism 'samples' the Earth's mantle to great depths, because solid-state convection transports deep material into the (shallow) melting region. The isotopic and trace-element chemistry of these basalts shows that the mantle contains several isotopically and chemically distinct ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of colorectal disease 12 (1997), S. 267-271 
    ISSN: 1432-1262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé. Problématique: Le risque de développer un carcinoma invasif en cas d'adénome colorectal est influencé par nombre de caractéristiques à la fois des patients et des adénomes dans le collectif d'échantillons analysés. Patients et méthodes: Entre 1978 et 1993, plus de 20,000 polypes ont été documentés prospectivement dans le registre des polypes colorectaux de Erlangen et analysés au moyen d'une analyse statistique de régression logique. Résultats: La taille des adénomes s'est révélée être le facteur le plus important en cas d'adénome de plus de 15 mm en comparaison avec des lésions plus petites. Cinq mille cent trente sept adénomes de moins de 5 mm sont porteurs d'un carcinome invasif. Les adénomes du côlon droit présentent un risque inférieur de malignité que ceux du côlon gauche ou du rectum mais le risque de dégénérescence augmente avec la taille de l'adénome. Dans le cas d'adénomes de moins de 36 mm de diamètre, le risque de carcinomes invasifs est observé plus fréquemment s'ils siègent au niveau du rectum ou du côlon gauche alors que des adénomes de plus de 36 mm sont plus fréquemment porteurs de carcinomes s'ils sont localisés dans le côlon droit ou le côlon gauche plutôt que le rectum. En conclusion: Une analyse multi-variée de 11,380 adénomes détectés à une première pancolonoscopie montre que les facteurs de siège et de taille qui peuvent tous deux être déterminés par la seule colonoscopie sont à même de prédire le risque de malignité de manière adéquate, tant sur le plan statistique que sur le plan clinique.
    Notes: Abstract . Background: The risk of invasive carcinoma developing in colorectal adenomas is influenced by a number of characteristics of both patients and adenomas, and the composition of the sample analysed. Patients and methods: Between 1978 and 1993 more than 20 000 polyps were prospectively documented at the Erlangen Registry of Colorectal Polyps, and analysed statistically by logistic regression. Results: The size of the adenomas proved to be the most important factor for adenomas equal to or larger than 15 mm as compared with smaller lesions. In 5137 diminutive adenomas (≤5 mm) invasive carcinoma was never found. Adenomas in the right-sided colon had a lower risk than those in the left colon or rectum, but with increasing adenoma size, the malignancy rate showed a right-sided shift. In adenomas of up to 36 mm in diameter, invasive carcinoma was found more often when they were located in the rectum or left colon while adenomas larger than 36 mm were more likely to harbour invasive carcinoma when located in the right or left colon rather than in the rectum. Conclusions: A multivariate analysis of 11380 adenomas detected at the first total colonoscopy showed that the factors size and site, both of which can be assessed by endoscopic inspection alone, were found to enable a statistically and clinically adequate assessment of the malignancy risk.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The photoplate detection system of a spark source mass spectrometer has been recently replaced by a detector array consisting of 20 separate small channeltrons for simultaneous ion counting of up to 20 trace elements. The new multi-ion counting – spark source mass spectrometry (MIC-SSMS) technique combines the advantages of conventional SSMS with modern on-line detection of elements. It has important analytical features, such as simple and fast solid-state sample preparation, high precision (about 1–2%) and accuracy (4%) using multielement isotope dilution, high sensitivity which leads to short measuring times (10–50 min) and low detection limits (about 0.001–0.01 μg/g).
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...