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  • 1
    Electronic Resource
    Electronic Resource
    Paris-type mycorrhizas in Smilax aspera L. growing in a Mediterranean scherophyllous wood (2000)
    Springer
    Mycorrhiza 10 (2000), S. 9-13 
    Details
    ISSN: 1432-1890
    Keywords: Arbuscular mycorrhizas ; Smilax aspera ; Glomus mosseae ; Glomus viscosum ; Paris-type mycorrhizas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Paris- type mycorrhiza is described in Smilax aspera L., an evergreen climbing plant of Mediterranean sclerophyllous woods. Wild plants were sampled from a protected area inside the Regional Natural Park Migliarino-S.Rossore-Massaciuccoli, on the northwestern coast of Italy, near Pisa. Mycorrhizas formed by S. aspera were identified as a variation of Paris-type arbuscular mycorrhizas. Detailed observations on stained roots and on fresh root sections showed that, after forming the appressorium, the fungus colonized the root by penetrating individual cells, growing intracellularly from cell to cell, and producing many coils and terminal arbuscules. S. aspera seedlings inoculated with the arbuscular mycorrhizal fungi Glomus mosseae and G. viscosum, which are known to form Arum-type mycorrhizas in many plant species, produced the same Paris-type-like mycorrhizas found in nature. This confirms that the type of arbuscular mycorrhizal infection is largely governed by the plant host genotype. Plants of S. aspera inoculated with G. mosseae and G. viscosum had larger growth increments than uninoculated plants. Thus Paris-type mycorrhizas produce growth responses comparable to those of Arum-type mycorrhizas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005720050281
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  • 2
    Electronic Resource
    Electronic Resource
    Diversity of culturable bacterial populations associated to Tuber borchii ectomycorrhizas and their activity on T. borchii mycelial growth (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 211 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Isolation and physiological and molecular characterisation of culturable bacterial strains belonging to actinomycetes, pseudomonads and aerobic spore-forming bacteria were carried out on mycorrhizal root tips of Quercus robur var. peduncolata infected by Tuber borchii. Cellular density of the three bacterial groups in ectomycorrhizal root tips was estimated to be 1.3±0.11×106 cfu g−1 dry weight for total heterotrophic bacteria and 1.08±0.6×105 (mean±S.E.), 1.3±0.3×105 and 1.4±0.2×105 cfu g−1 dry weight for pseudomonads, actinomycetes and spore-forming bacteria respectively. Identification of pseudomonads by the Biolog® system indicated, besides the most represented species Pseudomonas fluorescens (biotypes B, F and G), the occurrence of strains belonging to Pseudomonas corrugata. Amplified ribosomal DNA restriction analysis of actinomycetes and spore formers revealed at least three and six different groups of patterns, respectively. Many bacterial isolates were able to induce variations in growth rates of T. borchii mycelium; among these, 101 strains showed antifungal activity, whereas 17 isolates, belonging to spore formers, were able to increase mycelial growth up to 78% when compared to uninoculated mycelial growth. The potential role of these populations in the development and establishment of mycorrhizas is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11224.x
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  • 3
    Electronic Resource
    Electronic Resource
    A Portable Data Logger for Recording Behavioral and Environmental Determinants of Blood Pressure during Ambulatory Monitoring (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 783 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb26730.x
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  • 4
    Electronic Resource
    Electronic Resource
    High Bilirubin Levels Interfere with Serum Tartrate-Resistant Acid Phosphatase Determination: Relevance as a Marker of Bone Resorption in Jaundiced Patients (1999)
    Springer
    Calcified tissue international 64 (1999), S. 301-303 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Hepatic diseases — Biochemical markers — Bone turnover — Acid phosphatase.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. Serum tartrate-resistant acid phosphatase (TRAcP) activity is considered to be a biochemical marker of bone resorption. Recently, a lack of specificity of collagen-related markers for assessing bone turnover has been observed in patients with chronic liver disease. Thus, it could be of great interest to determine serum TRAcP activity in such patients. However, nonspecificity of the analytical reaction could occur when hemolyzed, lipemic, or icteric specimens are analyzed. Therefore, we have studied the interference caused by bilirubin in the measurement of serum TRAcP activity using the Hillmann method. The interference was assessed in two pools of serum containing different bilirubin concentrations but with similar total AcP levels. Mixing proportional parts of the two pools, 10 samples were also obtained. Serum activities of total AcP and TRAcP, and the concentration of bilirubin were measured in the 10 samples. Both the actual and the expected values obtained by theoretical calculations were compared. Serum bilirubin values of 2.4 mg/dl showed a negative interference of 15% in the determination of serum TRAcP activity, whereas values of bilirubin higher than 10 mg/dl interfered totally with the measurement of serum TRAcP. Bilirubin did not interfere with the total AcP determination. This study clearly shows the interference of bilirubin in the determination of serum TRAcP. This finding should be considered when bone metabolism disorders are evaluated in jaundiced patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900623
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  • 5
    Electronic Resource
    Electronic Resource
    Melt percolation and reaction atop a plume: evidence from the poikiloblastic peridotite xenoliths from Borée (Massif Central, France) (1998)
    Springer
    Contributions to mineralogy and petrology 132 (1998), S. 65-84 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Poikiloblastic harzburgite xenoliths (P-type) from Borée, France are characterised by large (〉1 cm), essentially unstrained olivines and high equilibrium temperatures (〉1200 °C). Mineralogical data, trace element abundances and Sr-Nd-O isotopes of the constituent minerals are consistent with formation as a result of melt percolation-reactions in a lherzolite precursor during lithospheric erosion by an upwelling plume. This petrogenetic model contrasts with previous models involving isochemical recrystallisation from a granular lherzolite precursor (G-type) or derivation as metacumulates from tholeiitic magmas. Numerical simulation of percolation reactions at the lithosphere-plume boundary using the plate model of Vernières et al. (1997) indicates that the different textured xenoliths may represent mantle from different levels in a percolation-reaction column. If correct then the P-type harzburgites resulted from pyroxene-dissolving and olivine-producing reactions at increasing melt fraction (〉3%) at the lower part of column (base of the lithosphere), whereas the G-type lherzolites were located within the low-porosity domain (〈0.1%) above a permeability barrier, and are formed through a melt-rock reaction at decreasing melt mass. Given the very low melt fraction, the REE fractionation in this zone is controlled by chromatographic effects coupled with source effects of reaction. The variations in porosity, melt/rock ratio and melt-rock reaction mechanism are believed to be responsible for the diversity of REE patterns and striking correlation between REE abundance and texture in Borée xenoliths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004100050405
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  • 6
    Electronic Resource
    Electronic Resource
    Investigation of the composition of solar and interstellar matter using solar wind and pickup ion measurements with SWICS and SWIMS on the ACE spacecraft (1998)
    Springer
    Space science reviews 86 (1998), S. 497-539 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Solar Wind Ion Composition Spectrometer (SWICS) and the Solar Wind Ions Mass Spectrometer (SWIMS) on ACE are instruments optimized for measurements of the chemical and isotopic composition of solar and interstellar matter. SWICS determines uniquely the chemical and ionic-charge composition of the solar wind, the thermal and mean speeds of all major solar wind ions from H through Fe at all solar wind speeds above 300 km s−1 (protons) and 170 km s−1 (Fe+16), and resolves H and He isotopes of both solar and interstellar sources. SWICS will measure the distribution functions of both the interstellar cloud and dust cloud pickup ions up to energies of 100 keV e−1. SWIMS will measure the chemical, isotopic and charge state composition of the solar wind for every element between He and Ni. Each of the two instruments uses electrostatic analysis followed by a time-of-flight and, as required, an energy measurement. The observations made with SWICS and SWIMS will make valuable contributions to the ISTP objectives by providing information regarding the composition and energy distribution of matter entering the magnetosphere. In addition, SWICS and SWIMS results will have an impact on many areas of solar and heliospheric physics, in particular providing important and unique information on: (i) conditions and processes in the region of the corona where the solar wind is accelerated; (ii) the location of the source regions of the solar wind in the corona; (iii) coronal heating processes; (iv) the extent and causes of variations in the composition of the solar atmosphere; (v) plasma processes in the solar wind; (vi) the acceleration of particles in the solar wind; (vii) the physics of the pickup process of interstellar He in the solar wind; and (viii) the spatial distribution and characteristics of sources of neutral matter in the inner heliosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005036131689
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  • 7
    Electronic Resource
    Electronic Resource
    CELIAS - Charge, Element and Isotope Analysis System for SOHO (1995)
    Springer
    Solar physics 162 (1995), S. 441-481 
    Details
    ISSN: 1573-093X
    Keywords: SOHO ; Solar Wind ; Solar Energetic Particles ; Composition Measurements ; Time-of-Flight Spectrometer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The CELIAS experiment on SOHO is designed to measure the mass, ionic charge and energy of the low and high speed solar wind, of suprathermal ions, and of low energy flare particles. Through analysis of the elemental and isotopic abundances, the ionic charge state, and the velocity distributions of ions originating in the solar atmosphere, the investigation focuses on the plasma processes on various temporal and spatial scales in the solar chromosphere, transition zone, and corona. CELIAS includes 3 mass- and charge-discriminating sensors based on the time-of-flight technique: CTOF for the elemental, charge and velocity distribution of the solar wind, MTOF for the elemental and isotopic composition of the solar wind, and STOF for the mass, charge and energy distribution of suprathermal ions. The instrument will provide detailed in situ diagnostics of the solar wind and of accelerated particles, which will complement the optical and spectroscopic investigations of the solar atmosphere on SOHO. CELIAS also contains a Solar Extreme Ultraviolet Monitor, SEM, which continously measures the EUV flux in a wide band of 17 – 70 nm, and a narrow band around the 30.4 nm He II line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00733436
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  • 8
    Electronic Resource
    Electronic Resource
    A comprehensive datamodel for karyological databases (1997)
    Springer
    Plant systematics and evolution 205 (1997), S. 85-98 
    Details
    ISSN: 1615-6110
    Keywords: Karyology ; cytology ; karyological descriptors ; information systems ; databases ; data structure ; information model ; datamodel ; data structure diagrams ; CDEFD project
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A project-independent data model for the entire range of karyological information provides a comprehensive picture of all data items presently used in karyological research and characterizes their logical inter-relation. It is presented in the form of a hierarchical decomposition of the subject matter down to attribute-level data items. The applied analytical methods are relevant for the structuring of information in other branches of biology. Only sporadic and inconsistent efforts have previously been made to make the huge amount of available karyological information accessible in electronic form. In the view of growing demand for the availability of scientific data on computer networks, further attempts are to be expected presently. The present data model provides a framework for the design of individual databases and ensures compatibility of the resulting datasets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982799
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  • 9
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    Sigmoidal approximations for self-interacting line processes in edge-preserving image restoration (1995)
    Elsevier
    Details
    Publication Date: 1995-10-01
    Print ISSN: 0167-8655
    Electronic ISSN: 1872-7344
    Topics: Computer Science
    Published by Elsevier
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  • 10
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    Preconditioned edge-preserving image deblurring and denoising (2001)
    Elsevier
    Details
    Publication Date: 2001-08-01
    Print ISSN: 0167-8655
    Electronic ISSN: 1872-7344
    Topics: Computer Science
    Published by Elsevier
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