ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Trophic ecology of Rimicaris exoculata : a combined lipid abundance/stable isotope approach (1999)
    Springer
    Marine biology 133 (1999), S. 495-499 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The alvinocaridid shrimp Rimicaris exoculata is an abundant component of the biota of Mid-Atlantic Ridge hydrothermal vents. To determine the nutritional strategy of this organism, we analysed the molecular abundance and carbon isotopic composition of its phospholipid fatty acids. High abundances of n-7 fatty acids (〉40% total fatty acids) were observed in R. exoculata muscle tissues, in bacterial epibionts scraped from its gill bailers, and from the bacterially infested metal sulphides that the shrimp ingest. The phospholipid fatty acid abundance data indicates that the bacteria in the sulphides are closely related to the bacterial epibiota inhabiting the shrimp gill bailers, carapace and other body parts. Compound specific δ13C analyses of the phospholipid fatty acids gave average values of −12‰ for the epibiont bacteria and −21‰ for the sulphide bacteria. This difference may be largely due to the expression of different forms of RuBisCO (Forms I and II) which fractionate against 13C to different extents. Carbon limitation within the shrimp epibiont population may be an additional factor. The δ13C values (mean = −13‰) of the saturated and monounsaturated fatty acids isolated from the muscle tissues of R. exoculata were very close to those of the epibionts, indicating that the predominant source of dietary carbon for the shrimp is their epibionts, with a lesser contribution from free-living bacteria. The δ13C values (−26‰) of shrimp cholesterol were much more negative than those of the fatty acids, and this cholesterol is likely to have derived from the oceanic photic zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050489
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Application of real-time mass spectrometric techniques to environmental organic geochemistry II. Organic matter in San Francisco bay area water (1973)
    Springer
    Archives of environmental contamination and toxicology 1 (1973), S. 193-208 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract A preliminary study was made of the solvent-soluble (organic) matter passing through a fine fritted filter in samples of water taken from the San Francisco and San Pablo bays, the Carquinez Strait, and an estuary in the confluence of the Sacramento and San Joaquin rivers. The petroleum ether extracts (ranging from 2.5 to 102 µg/liter) were analyzed using gas chromatography, computer-coupled gas chromatography/mass spectrometry, and high-resolution mass spectrometry. The organic compounds identified in these extracts are quite diverse and consist mainly of hydrocarbons from various sources. Some phthalate esters occur at various sampling sites. The conclusion is that the techniques of gas chromatography/mass spectrometry and high-resolution mass spectrometry are ideally suited to the assessment of some of the potential interactions of pollutants and other organic compounds in the aquatic environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01985744
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Application of real-time mass spectrometric techniques to environmental organic geochemistry. I. Computerized high resolution mass spectrometry and gas chromatography-low resolution mass spectrometry (1975)
    Springer
    Archives of environmental contamination and toxicology 3 (1975), S. 385-409 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract LOGOS (Smithet al. 1971), an integrated mass spectrometer/computer system, has been employed in a series of experiments which illustrate the utility of the automated techniques of real-time mass spectrometry in the study of organic compounds in the environment. These techniques are shown to be particularly useful in resolving complex mixtures of organic compounds encountered in environmental studies. Complete high resolution mass spectrometry, particularly when used in conjunction with combined gas chromatography/mass spectrometry, and auxiliary techniques such as stable isotopic labeling are described to illustrate the type and scope of information that may be obtained. Illustrative samples include extracts of air- and waterborne particulates, extracts of water-soluble organic material, and a DDT metabolite from sewage sludge.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02220811
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    An automatically-returned Martian sample by 1985? (1974)
    Springer
    Origins of life and evolution of the biospheres 5 (1974), S. 463-482 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The success of the lunar sample analysis programs underscores the desirability of a returned Martian sample. A Mission which would bring back about 1 kg of soil is outlined. The vehicle would have a mass of about 15 tonnes on departure from Earth and would make extensive use of Viking and Mariner technology. Russian experience in the field of automatic soil sampling and automatic rendezvous would be invaluable and the Shuttle would make possible a tidier launch. Sterilisation or quarantine will be necessary to preclude back-contamination of Earth by hypothetical Martian micro-organisms. A prime quarantine facility designed to detect biogenic organic compounds and life processes could be set up at a Lunar base or in a Sky-lab. A single soil sample could be informative as to the general surface composition of Mars. Life detection would be a major task, followed closely by the chemistry of carbon and other life-related elements. However, knowledge of the detailed physics, chemistry and mineralogy of the Martian sample would be of inestimable value to planetary studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01207645
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Lunar carbon chemistry: Relations to and implications for terrestrial organic geochemistry (1972)
    Springer
    Origins of life and evolution of the biospheres 3 (1972), S. 497-506 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The effort expended on the study of lunar carbon chemistry by a sizeable section of the organic geochemical community has resulted in a temporary dislocation in the research output in organic geochemistry. However the long-term beneficial effects of the lunar studies are already obvious in the new and improved methodology, control of contamination, and renewed interest in the characterisation, quantitation and significance of low molecular weight carbon compounds, polymers and inorganic forms of carbon. The role of carbon at the lunar surface is evidently a complex one, the understanding of which should lead to important generalisations for planetary processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00926780
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Editorial: Planetary science (1970)
    Springer
    Origins of life and evolution of the biospheres 2 (1970), S. 299-300 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00929290
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    The effects of nitrogen fertilisation and elevated CO2 on the lipid biosynthesis and carbon isotopic discrimination in birch seedlings (Betula pendula) (1999)
    Springer
    Plant and soil 216 (1999), S. 35-45 
    Details
    ISSN: 1573-5036
    Keywords: Betula pendula ; Nitrogen fertilisation ; CO2 concentration ; Carbon isotopic fractionation ; Lipids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effects of nitrogen (N) fertilisation and elevated [CO2] on lipid biosynthesis and carbon isotope discrimination in birch (Betula pendula Roth.) transplants were evaluated using seedlings grown with and without N fertiliser, and under two concentrations of atmospheric CO2 (ambient and ambient+250 μmol mol-1) in solar dome systems. N fertilisation decreased n-fatty acid chain length (18:0/16:0) and the ratios of α-linolenate (18:2)/linoleate (18:1), whereas elevated [CO2] showed little effect on n-fatty acid chain length, but decreased the unsaturation (18:2+18:1)/18:0. Both N fertilisation and elevated [CO2] increased the quantity of leaf wax n-alkanes, whilst reducing that of n-alkanols by 20–50%, but had no simple response in fatty acid concentrations. 13C enrichment by 1–2.5‰ under N fertilisation was observed, and can be attributed to both reduced leaf conductance and increased photosynthetic consumption of CO2. Individual n-alkyl lipids of different chain length show consistent pattern of δ13C values within each homologue, but are in general 5–8‰ more depleted in 13C than the bulk tissues. Niether nitrogen fertilisation and elevated CO2 influenced the relationship between carbon isotope discrimination of the bulk tissue and the individual lipids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004771431093
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Palaeolimnological studies of laminated sediments from the Shropshire-Cheshire meres (1991)
    Springer
    Hydrobiologia 214 (1991), S. 279-292 
    Details
    ISSN: 1573-5117
    Keywords: Holocene ; palaeolimnology ; diatom ; lipid ; palaeomagnetism ; varves
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Studies of frozen and soft mud cores from Ellesmere Mere, Rostherne Mere and Berrington Pool, the three deepest of the Shropshire-Cheshire meres of the English Midlands, reveal the presence of laminations which may be varves. This hypothesis is being tested by means of fine resolution diatom and other microfossil analysis after the method of Simola (1977). Even where the laminations are faint and disrupted, it appears that seasonal signals from algal blooms are preserved. Organic geochemical analyses of sediments from Ellesmere show that the uppermost layers contain abundant organic matter (over 17% total dry matter) and that the extractable lipid fractions from different horizons exhibit clear compositional differences. These are produced by temporal changes in the organic inputs to the sediments, and also by diagnetic effects. The clastic and organic content of the cores also provides evidence for lake level variations in this area over the last 250 years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00050962
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Capillary GC and GC-MS of porphyrins and metalloporphyrins (1982)
    Springer
    Chromatographia 16 (1982), S. 304-308 
    Details
    ISSN: 1612-1112
    Keywords: Capillary gas chromatography ; Gas chromatography-mass spectrometry ; Metalloporphyrins ; Trialkylsiloxy derivatives ; Alkyl porphyrins ; Geochemical analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Despite their inherent low volatility, a wide range of alkyl porphyrins and their various metallo-derivatives have been successfully analysed by gas chromatography on wall coated open tubular (WCOT) capillary columns. As a result of their superior peak shape (comparable ton-alkanes of similar retention times) and relatively low Kovat's retention indices (3300–3900), the bis(trialkylsiloxy)Si(IV) derivatives offer the greatest potential for the GC analysis of geological mixtures of alkyl porphyrins. Similar derivatives of porphyrins of biomedical importance, possessing polar side chains, are also amenable to GC and GC-MS analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02258926
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    facet.materialart.
    Unknown
    Capillary GC and GC-MS of porphyrins and metalloporphyrins (1982)
    Springer
    Details
    Publication Date: 1982-12-01
    Print ISSN: 0009-5893
    Electronic ISSN: 1612-1112
    Topics: Chemistry and Pharmacology
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...