ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Artikel  (24)
  • Springer  (20)
  • Wiley  (4)
Sammlung
  • Artikel  (24)
Datenquelle
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
Zeitschrift
Thema
  • 1
    Digitale Medien
    Digitale Medien
    DDT residues in cod livers from the maritime provinces of Canada (1975)
    Springer
    Bulletin of environmental contamination and toxicology 14 (1975), S. 505-512 
    Details
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Notizen: Abstract The residues of DDT and its analogs were estimated in a number of cod liver samples (Gadus morhua) collected at six sampling sites off the Atlantic Coast of the Maritime Provinces of Canada during the summer of 1971. The residue levels indicated widespread distribution of DDT over the entire region sampled. Variations in the relative contributions of p, p′-DDE and p,p′-DDT to the total DDT residues (ΣDDT) were noted and the tendency for these residues to preferentially accumulate in lipid rich tissues was demonstrated. The residue levels found in cod livers were compared to the residue levels determined in cod flesh taken from some of the same specimens and also to residue levels in commercially refined cod liver oils. Samples of each of these types were stored at −29°C and analyzed in 1973 for DDT and PCB simultaneously. The ΣIDDT residues determined by both methods of analysis were compared.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01705519
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Organochlorine residues in fish and fishery products from the Northwest Atlantic (1977)
    Springer
    Bulletin of environmental contamination and toxicology 18 (1977), S. 697-705 
    Details
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Notizen: Abstract The residues of polycholorinated biphenyls (PCBs) and DDT (p,p′-DDT and its metabolites) were determined in fish collected at various sites off the Atlantic Coast of Canada during 1971 and 1972. The results of analyses of 261 samples representing 29 species of Crustacea, bivalves and finfish, indicated widespread distribution of these contaminants and preferential accumulation in lipid rich specimens. Only fatty specimens of pelagic finfish consistently contained more than 0.1 μg/g of PCB and DDT. Bluefin tuna was the only species with residues frequently in excess of 1 μg/g. No appreciable differences were observed in residue levels of specimens taken during different years or in specimens taken at different sampling sites. A total of 83 samples representing 7 selected tissues and fishery products were also analyzed for PCB and DDT. No residues of lindane, aldrin, heptachlor, heptachlor epoxide and methoxychlor, and only very low levels of dieldrin and hexachlorobenzene were present in the 104 samples examined for these residues.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01691981
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Biodegradation of atrazine under denitrifying conditions (1998)
    Springer
    Applied microbiology and biotechnology 49 (1998), S. 618-623 
    Details
    ISSN: 1432-0614
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract Anaerobic biodegradation of atrazine by the bacterial isolate M91-3 was characterized with respect to mineralization, metabolite formation, and denitrification. The ability of the isolate to enhance atrazine biodegradation in anaerobic sediment slurries was also investigated. The organism utilized atrazine as its sole source of carbon and nitrogen under anoxic conditions in fixed-film (glass beads) batch column systems. Results of HPLC and TLC radiochromatography suggested that anaerobic biotransformation of atrazine by microbial isolate M91-3 involved hydroxyatrazine formation. Ring cleavage was demonstrated by 14CO2 evolution. Denitrification was confirmed by detection of 15N2 in headspace samples of K15NO3-amended anaerobic liquid cultures. In aquatic sediments, mineralization of uniformly ring-labeled [14C]atrazine occurred in both M91-3-inoculated and uninoculated sediment. Inoculation of sediments with M91-3 did not significantly enhance anaerobic mineralization of atrazine as compared to uninoculated sediment, which suggests the presence of indigenous organisms capable of anaerobic atrazine biodegradation. Results of this study suggest that the use of M91-3 in a fixed-film bioreactor may have applications in the anaerobic removal of atrazine and nitrate from aqueous media.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002530051223
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Book reviews (1967)
    Springer
    Journal of materials science 2 (1967), S. 407-408 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00572427
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Integrated model systems for national assessments of the effects of climate change: Applications in New Zealand and Bangladesh (1996)
    Springer
    Water, air & soil pollution 92 (1996), S. 215-227 
    Details
    ISSN: 1573-2932
    Schlagwort(e): New Zealand ; Bangladesh ; coastal resources ; water resources ; agroclimatic zones ; hydrology ; integrated model system ; BDCLIM ; CLIMPACTS
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract To examine the sensitivity of environmental systems to climatic variability and change, integrated model systems for climate impact assessment are being developed for New Zealand (CLIMPACTS) and Bangladesh (BDCLIM). Features common to both model systems include a global climate model, regional modules for generating climate scenarios, and models for biophysical impact analyses. For CLIMPACTS, modified ecosystem models for horticultural crops, arable crops, and pasture production are being incorporated. For BDCLIM, the emphasis is on analysis ofpossible changes in agroclimatic zones and hydrology, including the risks of floods and droughts. The initial emphasis of both systems is on nationwide spatial analyses, using simplified models as much as possible. The development of integrated model systems supports the needs of the respective countries in assessing scientific uncertainties, evaluating vulnerabilities, and identifying adaptation options as a basis for international reporting requirements under the U.N. Framework Convention on Climate Change and for policy and planning at national and regional levels. The major advantage of such integrated model systems is that they can readily be updated as the science of climate change advances, thus providing an evolving tool for future reassessments of climate impacts.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00175567
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Investigating Climate Change Impacts and Thresholds: An Application of the CLIMPACTS Integrated Assessment Model for New Zealand Agriculture (2000)
    Springer
    Climatic change 46 (2000), S. 91-113 
    Details
    ISSN: 1573-1480
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The determination of `critical thresholds'is an essential task for informed policydecisions on establishing greenhouse gas emissiontargets. This paper presents a framework fordetermining critical thresholds for New Zealandagriculture, focusing on three agriculturalcrops – kiwifruit, grain maize, andPaspalum dilatatum – as exemplars for the fruitproduction, arable cropping and dairy productionindustries in New Zealand. The approach is based onthe application of a country-scale, integratedassessment model, called CLIMPACTS. The CLIMPACTSsystem contains a climate change scenario generator,climate and land data, and sectoral impact models. Importantly, CLIMPACTS allows time-dependentassessments of climate change and its effects, whichfacilitates the identification and examination of thresholds, which largely relate to spatial changes, over time, in regions of economic importance for these crops. However, whether such thresholds are `critical' for New Zealand cannot currently be addressed by the CLIMPACTS model. The determination of `criticality' requires a fully integrated assessment in which the social, economic, and environmental costs and risks associated with these thresholds are comprehensively evaluated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1005576910408
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    A bend-testing stage for the scanning electron-microscope (1970)
    Springer
    Journal of materials science 5 (1970), S. 873-880 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The design of a stage to bend materials in a scanning electron-microscope (Stereoscan, Cambridge Scientific Instruments Ltd) is described together with examples of its use in the fracture of composite materials. The bend module, when fitted to a large modular stage, can be used with existing scanning electron microscopes and is capable of bending, under increasing load or cyclic loading conditions, rectangular specimens of a maximum size 44×4×1.5 mm, to a maximum strain of 1.5%. Using the module with a standard display system the non-catastrophic stages of deformation and failure can be followed at higher magnification than has previously been possible. When the module is used in conjunction with a fast scanning and display system, deformation and fracture processes may be recorded at high magnifications while the specimen is being strained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00574859
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    The development of composite carbon fibres of large diameter—macro fibres (1974)
    Springer
    Journal of materials science 9 (1974), S. 835-844 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract This paper describes the development of a process for manufacturing carbon fibres of larger diameter than those normally available from the “RAE process” [1] or other routes which have so far been described (e.g. the hot-stretching of pitch [2] or cellulose-based [3] fibres). The method consists of impregnating a bundle of carbon fibres or their precursors with resin and after curing, subjecting the composite fibre to a controlled carbonization. The end-product is a thin rod or fibre of carbon-fibre reinforced carbon, which can, in principle, have any desired cross-sectional shape or area [4]. Experiments have been conducted to discover the effect of various processing variables on the properties of the composite fibre. Having chosen a suitable resin for impregnation the principal variables are (a) the degrees of pyrolysis of the initial fibre before impregnation, (b) the rate of cure of the resin to form the “intermediate” and (c) the rate of temperature rise and the maximum temperature during the carbonization process. Fibres of reasonable properties (Young's modulus 76.8 GN m−2 and ultimate tensile strength of 267 MN m−2) have been produced but improvements should be obtainable by optimization of this basic process as fibres with strengths up to 400 MN m−2 have been observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00761804
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Fracture studies on polypropylene (1975)
    Springer
    Journal of materials science 10 (1975), S. 647-657 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Measurements of fracture surface energy have been made on polypropylene in the undrawn state and at different states of orientation over the temperature range −60 to 60° C. Tear tests were employed and it was found that the fracture surface energy of unoriented material was of the order of 104 to 105 J m−2. As orientation (represented by birefringence) increased, the fracture surface energy decreased by a factor of approximately 100 at room temperature but this factor was found to decrease with decreasing temperature. For all degrees of orientation, the fracture surface energy increased with increasing temperature in the range −60 to 60°C, Scanning electron microscope studies showed a direct relation between the crack tip diameter and the fracture surface energy of unoriented specimens. From comparable studies on the tearing of rubber, Thomas has interpreted such a relationship as implying that the high values of fracture surface energy arise from the energy required to deform the material in the crack tip up to the breaking point. On this basis the reduction in fracture surface energy with increase in orientation may be regarded as being due to the associated diminution of the crack tip diameter. This interpretation is substantiated by direct measurements of crack tip diameter for specimens of intermediate and high orientation. Further microscopic studies of fracture surfaces indicate three modes of fracture which have been correlated with the appearance of the crack tip and tend to occur in certain ranges of birefringence.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00566573
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Assessment of damage in GRP laminates by stress wave emission and dynamic mechanical measurements (1977)
    Springer
    Journal of materials science 12 (1977), S. 2329-2342 
    Details
    ISSN: 1573-4803
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract Stress wave emission (SWE) and dynamic mechanical methods are described for monitoring the damage introduced into certain glass fibre-reinforced epoxy specimens by the application of a tensile load. For one particular composite system, a cross-ply laminate, it was possible to measure the concentration of damage by an independent optical method and correlations have been found between the SWE and dynamic mechanical results and the area of cracking. It remains to be established whether these correlations apply to other reinforcement geometries. This work is considered a first stage towards using these methods for monitoring the integrity of a component in service, from which its remaining life might be assessed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00552254
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...