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  • 1
    Electronic Resource
    Electronic Resource
    The percentage of rigid chain length, (PRCL), a new concept for predicting glass transition temperatures and melting points of poly(aryl ether ketones) and poly(aryl ether sulfones) (1992)
    s.l. : American Chemical Society
    Macromolecules 25 (1992), S. 6646-6650 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00050a038
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  • 2
    Electronic Resource
    Electronic Resource
    Can we predict the mating pattern ofDrosophila females from the sperm length distribution in males? (1991)
    Springer
    Cellular and molecular life sciences 47 (1991), S. 111-114 
    Details
    ISSN: 1420-9071
    Keywords: Drosophila ; repeat matings ; polyandrous pattern diversity ; sperm length
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In order to test the validity of the prediction of the mating pattern of females from the sperm length distribution in males, three species ofDrosophila were analysed. Males in the three species are equally polygynous but females differ in the level of polyandry. A ‘low recurrence polyandry’ is observed in the sperm dimorphic speciesD. affinis while a ‘high recurrence polyandry’ is observed in the sperm monomorphic speciesD. latifasciaeformis andD. littoralis. These results are consistent with the hypothesis proposed previously that sperm dimorphism in males can only be maintained by a selective alternative in females (i.e. facultative female polygamy), whereas a stricter mating system (e.g., ‘obligatory’ polyandry) should only result in sperm monomorphism irrespective of the absolute value of sperm length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041270
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  • 3
    Electronic Resource
    Electronic Resource
    Essai ďApplication de ľAnalyse Phénétique à la Classification du Phylum des Ciliophora (1984)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 31 (1984), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1984.tb05491.x
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  • 4
    Electronic Resource
    Electronic Resource
    Interfacial layer characterization in dental composite (2003)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 30 (2003), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary  Nowadays, dental resins find increasing use by practitioners. However, photopolymerization of such resins is limited to a so-called ‘depth of cure’. To face this problem, dentists superimpose resin layers of limited depth. This technique raises the problem of the quality of interlayer. This paper aims at screening different cases of adhesion at the interface. Shear strength of such interfacial layers is tested in shear mode in various conditions (with or without an oxygen-inhibited layer, or contaminated by saliva or water). Unexpectedly, the presence of an oxygen-inhibition on the first layer, as assessed using micro-Raman spectroscopy, induces higher shear strength. In this case, a cohesive break occurs while an adhesive one is observed in all the other cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2003.01008.x
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  • 5
    Electronic Resource
    Electronic Resource
    Raman scattering determination of the depth of cure of light-activated composites: influence of different clinically relevant parameters (2002)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The purpose of this research was to determine the depth of cure of light-activated composites in relation with different clinically relevant parameters. A Raman spectroscopic method has been used. The measurement of cure is made on a relative basis by comparing the vibration band of the residual unpolymerized methacrylate C=C bond at 1640 cm–1 against the aromatic C=C stretching band at 1610 cm–1 used as an internal standard. The information gained draw attention to the importance of light transmission during the exposure. The influence of sample's thickness on the depth of cure is illustrated by a second order polynomial regression. The shade and translucency of the resin composite also modify the light transmission and thus have a significant influence on the degree of conversion. Moreover the light-source intensity and the distance from the curing tip are important parameters of influence. A significant reduction of the depth of cure is observed for all sample thickness of resin composite tested when using a light device with an intensity of 300 mW cm–2 as well as using a distance from the curing tip higher than 20 mm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.00889.x
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  • 6
    Electronic Resource
    Electronic Resource
    Approximate models for ductile metals containing non-spherical voids-Case of axisymmetric prolate ellipsoidal cavities
    Amsterdam : Elsevier
    Journal of the Mechanics and Physics of Solids 41 (1993), S. 1723-1754 
    Details
    ISSN: 0022-5096
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-5096(93)90029-F
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  • 7
    Electronic Resource
    Electronic Resource
    Initial results of remediation activities to restore hypereutrophic Villerest Reservoir (Roanne, France) (2004)
    Oxford, UK : Blackwell Science Pty
    Lakes & reservoirs 9 (2004), S. 0 
    Details
    ISSN: 1440-1770
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography
    Notes: We examined the impacts of remediation activities aimed at improving the water quality of hypereutrophic Villerest Reservoir, in which Microcystis aeruginosa dominated during the summer. We also compared nutrients and chlorophyll a data from this study with the results of a previous study on the reservoir. Between the two studies, the nitrogen and phosphorus loads into the reservoir from the main tributary decreased by 70% and 80%, respectively. Within the reservoir, the quantities of ammonia-nitrogen were similar in the two studies, and the total nitrogen was significantly higher in this study compared to the initial study. Both the phosphate-phosphorus and total phosphorus concentrations decreased significantly between the two studies. However, the statistically significant decrease in phosphate-phosphorus and total phosphorus did not always lead to a significant decrease in chlorophyll a concentrations. The nitrogen/phosphorus mass ratio during the present study remained well above five, the critical value below which summer blooms of Microcystis aeruginosa were observed in Villerest Reservoir. These study results indicated that the remediation activities being used to improve the water quality of Villerest Reservoir were off to a good start.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1770.2004.00241.x
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  • 8
    Electronic Resource
    Electronic Resource
    Glutamine Synthetase activity in limnetic phytoplankton (1996)
    Springer
    Aquatic sciences 58 (1996), S. 103-119 
    Details
    ISSN: 1420-9055
    Keywords: Lake ; phytoplankton ; N-assimilation ; N-uptake ; Glutamine Synthetase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The seasonal distribution of potential Glutamine Synthetase (GS) activities was studied in eutrophic Lake Aydat (France, Massif Central). The validity of this index of N-assimilation in field studies was tested by a comparison with the coupling of distributions of inorganic nitrogen uptake rate based on14C incorporation into proteins and the amino acids to protein ratio together with several abiotic and biotic parameters. The potential GS activities recorded during the seasonal succession of phytoplankton (characterized by the dominance of diatoms) were in the same order of magnitude of those reported from the very poor literature on this subject. Over high N-NO 3 - availability, the potential GS activities recorded were close to indirect estimations of N-uptake rates. During nitrogen depletion, high potential GS activities (which coincided with a development of small diatoms) were recorded suggesting that cell metabolism adapted to N-nutrient constraints. In addition, potential GS activity evolved concomitantly to other indicators of N-uptake and N-status. However, N-assimilation rates based on the enzymatic approach were lower than those obtained through indirect isotopic determination of uptakes rates. We suggest therefore that GS was not the unique pathway of ammonium assimilation in field populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877110
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  • 9
    Electronic Resource
    Electronic Resource
    Right ventricular performance in patients with acute respiratory failure (1988)
    Springer
    Intensive care medicine 14 (1988), S. 474-477 
    Details
    ISSN: 1432-1238
    Keywords: RV performance ; Acute respiratory failure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To examine the right ventricular response to acute respiratory failure, serial studies of biventricular performance were analysed in 34 such patients, specifically detailing the role of associated underlying disease. During the initial study, the 34 patients with acute respiratory failure had a higher right ventricular end-diastolic volume than the control group (+21%), associated with a decrease in right ventricular ejection fraction, abnormalities which tended to return to normal values in the 15 survivors. In the 9 patients who died of refractory hypoxemia with severe pulmonary hypertension, the right ventricular dilation allowed to maintain stroke volume. In contrast, in 8 patients who died of septic shock, biventricular function was progressively altered (right and left ventricular ejection fraction= -37% and -35%). In 4 patients who died of cardiogenic shock (viral myocarditis), the cardiac function was the lowest (right and left ventricular ejection fraction= -59% and -60%). Only patients with acute respiratory failure associated with septic shock or viral myocarditis are unable to maintain their stroke volume.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256963
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  • 10
    Electronic Resource
    Electronic Resource
    Contribution a l'etude limnologique du lac pavin (France) I: Facteurs abiotiques et phytoplancton (1980)
    Springer
    Hydrobiologia 68 (1980), S. 167-189 
    Details
    ISSN: 1573-5117
    Keywords: lake ; physico-chemistry ; phytoplankton ; mathematical analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Located at 1197 m in the Massif Central Français, lake Pavin has a volcanic origin. It is a dimictic and meromictic lake of 44 ha of area and 92 m depth. Samples were collected bimonthly at 8 depth (0 to 40 m) from May 1973 to April 1974. Physicochemical parameters (light energy, temperature, pH, conductivity, Oxygen, Nitrogen, Phosphorus, Silice, Carbon) and dynamics of phytoplanktonic populations (cells counts, standing crop, primary production, photosynthetic pigments) were studied. The waters of this lake are clear, with low conductivity and high concentrations of oxygen in the first 40 meters. In a water column, 0–40 meters, the means of nitrogen concentrations are between 45 and 279 µg/l and between 0 and 161 µg/l for phosphorus. Phytoplankton is caracterised by an important development of Diatoms (Melosira italica subsp. subarctica and Asterionella formosa) in winter and spring, opposed to low standing crops of Chlorophycea (Coenococcus, Sphaerocystis, Chlamydomonas) in summer. The annual mean of primary production is about 360 mg C ass./m2.J. The highes values of the activity coefficient (P/B) are found during the development of Chlorophycea, but photosynthetic efficiency is maximum in winter for Diatom populations. To summarize physico-chemical parameters and phytoplankton relationships, a synthetical mathematical model was made by Principal Components Analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019702
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