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  • 1
    Online Resource
    Online Resource
    Cambridge :Elsevier Science & Technology,
    Keywords: Lipids -- Analysis. ; Electronic books.
    Description / Table of Contents: This well-known and highly successful book was first published in 1973 and has been completely re-written in subsequent editions (published in 1982 and 2003). This new Fourth Edition has become necessary because of the pace of developments in mass spectrometry of intact lipids, which has given recognition of lipid analysis and 'lipidomics' as a distinct science. To bring the book up to date with these developments, author William W. Christie is joined by co-author Xianlin Han. Although devoting considerable space to mass spectrometry and lipidomics, Lipid analysis remains a practical guide, in one volume, to the complexities of the analysis of lipids. As in past editions, it is designed to act as a primary source, of value at the laboratory bench rather than residing on a library shelf.Lipid analysis deals with the isolation, separation, identification and structural analysis of glycerolipids, including triacylglycerols, phospholipids, sphingolipids, and the various hydrolysis products of these. The chapters follow a logical sequence from the extraction of lipids to the isolation and characterization of particular lipid classes and of molecular species of each, and to the mass spectrometric analysis of lipids and lipidomics.The new influence of mass spectrometry is due mainly to the development of electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI). Most emphasis in this book is placed on ESI, which is enabling structural characterization of different lipid classes and the identification of novel lipids and their molecular species.
    Type of Medium: Online Resource
    Pages: 1 online resource (447 pages)
    Edition: 4th ed.
    ISBN: 9780857097866
    Series Statement: Oily Press Lipid Library Series ; v.24
    DDC: 547.77046
    Language: English
    Note: Cover -- Lipid analysis: ISOLATION, SEPARATION, IDENTIFICATION AND LIPIDOMIC ANALYSIS -- Copyright -- Preface -- Contents -- List of Abbreviations -- PART 1 Introducing lipids and their analysis -- CHAPTER 1 Lipids: their structures and occurrence -- A. Introduction -- B. Definitions -- C. Fatty acids -- D. The principal simple lipids and complex glycerolipids of animal and plant tissues -- E. Sphingolipids -- CHAPTER 2 Chromatographic analysis of lipids: general principles -- A. A statement of the problem -- B. The theory of chromatography -- C. Modes of separation in chromatography -- D. Gas chromatography -- E. High-performance liquid chromatography -- F. Thin-layer chromatography -- G. Supercritical fluid chromatography -- H. Mass spectrometry -- I. Quality control -- CHAPTER 3 Lipid extraction, storage and sample handling -- A. Introduction -- B. Some practical considerations -- C. The principles of solvent extraction procedures -- D. Recommended procedures -- PART 2 Chromatographic separation and analysis of individual lipid classes -- CHAPTER 4 Analysis of simple lipid classes -- A. Preliminary fractionation of lipid extracts -- B. Low-pressure column chromatography -- C. Thin-layer chromatography (TLC) -- D. High-performance liquid chromatography -- E. Determination of lipid profiles by gas chromatography -- F. Analysis of specific simple lipid classes -- G. Oxidized fats and oils -- CHAPTER 5 Chromatographic analysis of phospholipids and glycosyldiacylglycerols -- A. Introduction -- B. Separation by low-pressure column chromatography -- C. Thin-layer chromatography -- D. High-performance liquid chromatography -- E. Quantification of complex lipids separated by chromatography -- F. Phosphorus nuclear magnetic resonance spectroscopy -- G. Some specific problems in the analysis of complex glycerolipids. , CHAPTER 6 Chromatographic analysis of sphingolipids -- A. Introduction -- B. Preparation of sphingolipid-rich extracts -- C. Separation of neutral glycosphingolipid classes -- D. Separation of gangliosides -- E. Analysis of the hydrolysis products of glycosphingolipids -- F. Some miscellaneous glycolipids -- PART 3 The analysis of fatty acids -- CHAPTER 7 Preparation of derivatives of fatty acids -- A. Introduction -- B. Hydrolysis (saponification) of lipids -- C. The preparation of methyl and other esters of fatty acids -- D. Preparation of derivatives for mass spectrometry -- E. Derivatives of double bonds -- F. Derivatives of hydroxyl groups -- CHAPTER 8 Gas chromatographic analysis of fatty acid derivatives -- A. Introduction -- B. Columns and liquid phases -- C. Provisional identification using standards or retention time relationships -- D. Separation of the common fatty acids of plants and animals -- E. Positional and geometric isomers of unsaturated fatty acids -- F. Some applications to less common fatty acids -- G. Quantitative estimation of fatty acid compositions -- CHAPTER 9 Isolation of fatty acids and identification by spectroscopic and related techniques -- A. Introduction -- B. Simple concentration techniques -- C. Silver ion chromatography -- D. Reversed-phase high-performance liquid chromatography -- E. Adsorption chromatography -- F. Identification of fatty acids by chemical degradative procedures -- G. Spectroscopy of fatty acids -- H. Mass spectrometry of fatty acids -- PART 4 Chromatographic analysis of molecular species of lipids -- CHAPTER 10 Molecular species of triacylglycerols, diacylglycerols derived from complex lipids, and related lipids -- A. The nature of the problem -- B. Separation of triacylglycerol species -- C. Molecular species of monoand diacylglycerols -- D. Other simple lipids. , CHAPTER 11 Chromatographic analysis of molecular species of intact phospholipids and glycolipids -- A. Introduction -- B. High-performance liquid chromatography separation of intact phospholipids -- C. Glycoglycerolipids -- D. Glycosphingolipids -- CHAPTER 12 Positional distributions of fatty acids in glycerolipids -- A. Introduction -- B. Positional distribution of fatty acids in triacylglycerols -- C. Enzymatic hydrolysis of complex lipids -- PART 5 Mass spectrometric analysis of lipids in lipidomics -- CHAPTER 13 Introduction to mass spectrometric analysis of lipids in lipidomics -- A. Lipidomics -- B. Brief history of mass spectrometry for lipid analysis -- C. Modern developments in mass spectrometry for lipid analysis -- D. Tandem mass spectrometry modes useful for lipid analyses in lipidomics -- E. Impact of recent developments related to mass spectrometric analyses of lipids in lipidomics -- CHAPTER 14 Characterization of lipids by electrospray ionization mass spectrometry -- A. Introduction -- B. Characterization of individual classes of phospholipids -- C. Characterization of individual classes of sphingolipids -- D. Characterization of simple glycerolipids and glycosyldiacylglycerols -- CHAPTER 15 Practical identification of individual lipid species in lipid extracts of biological samples -- A. Introduction -- B. LC-MS based identification of individual molecular species of lipid classes -- C. Identification of individual molecular species of lipid classes by shotgun lipidomics -- D. Location of double bonds in individual lipid species -- CHAPTER 16 Quantification of lipid molecular species by electrospray ionization mass spectrometry -- A. Introduction -- B. Internal standards and normalization -- C. Quantification of lipids by HPLC-coupled ESI-MS and ESI-MS/MS -- D. Quantification of lipids after direct infusion. , E. Concerns associated with quantification -- F. Conclusions -- References -- Index.
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 5481-5487 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Measurements of rate coefficients for intramultiplet state transfer of Zn(4 3P1→4 3PJ') by collisions with the rare gases are presented. The state-to-state binary rate coefficients are derived from least-squares fittings of the time-resolved triexponential behavior of the 4 3P1 fluorescence. These rate coefficients were studied systematically over a temperature range of 690–1100 K in order to characterize the velocity dependence of the collisional coupling. The systematic behavior of the rate coefficients with varying temperature and noble gas species is qualitatively consistent with a nearly adiabatic coupling limit for noncrossing levels.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 56 (1993), S. 113-117 
    ISSN: 1432-0649
    Keywords: 33.80 ; 42.65 ; 42.72
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An intense radiation at 395.0 nm has been observed when lithium vapor is optically pumped in a heat pipe with a pulsed dye laser whose output wavelength is tuned near the Li 2s–4s two-photon resonance transition. The radiation is emitted in the direction along the pump laser beam. It is proposed that the 395.0 nm radiation is mainly generated through three-photon excitation and one-Raman-photon scattering followed by two-cascade (spontaneous) emission. The overall reaction mechanism can be described by a parametric six-wave mixing process. The quantum efficiency of the observed process is estimated to be of the order of 2 × 10−6.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 122 (1990), S. 125-136 
    ISSN: 1573-5036
    Keywords: aluminum ; microbial respiration ; phosphorus fractions ; soil moisture ; soil organic matter ; soil phosphorus ; soil respiration ; soil structure ; ultisol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Increased organic matter input into weathered and infertile soils through agricultural techniques such as minimum tillage or agroforestry can improve P availability to crops. Organic matter is an energy source for microbes, and their activity may be responsible in part for increased levels of labile P. The objective of the work reported here was to examine, in a highly weathered Ultisol, the influence of microbial activity in mobilizing P, maintaining it in a plant-available state, and preventing its fixation, and the effect of N and biocides on these processes. Exchangeable aluminum and soil moisture were also determined, since they interact with microbes and soil P. Results showed that increased microbial activity reduced sorption of dissolved and organic P by soil, maintained inorganic P in soluble and labile pools, increased microbial P, decreased mineral P, increased exchangeable Al, and increased water retention. Additions of N and biocides had variable effects, probably due to complex interactions between N, degrading biocides, and microbial populations.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Plant and soil 121 (1990), S. 125-136 
    ISSN: 1573-5036
    Keywords: aluminum ; microbial respiration ; phosphorus fractions ; soil moisture ; soil organic matter ; soil phosphorus ; soil respiration ; soil structure ; ultisol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Increased organic matter input into weathered and infertile soils through agricultural techniques such as minimum tillage or agroforestry can improve P availability to crops. Organic matter is an energy source for microbes, and their activity may be responsible in part for increased levels of labile P. The objective of the work reported here was to examine, in a highly weathered Ultisol, the influence of microbial activity in mobilizing P, maintaining it in a plant-available state, and preventing its fixation, and the effect of N and biocides on these processes. Exchangeable aluminum and soil moisture were also determined, since they interact with microbes and soil P. Results showed that increased microbial activity reduced sorption of dissolved and organic P by soil, maintained inorganic P in soluble and labile pools, increased microbial P, decreased mineral P, increased exchangeable Al, and increased water retention. Additions of N and biocides had variable effects, probably due to complex interactions between N, degrading biocides, and microbial populations.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 43 (1991), S. 475-479 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Simultaneous two-component interpenetrating polymer networks (IPNs) of polyurethane (PU)-poly(methyl acrylate) (PMA) were prepared, as well as the corresponding pseudo-IPNs. A comparison was made between the full IPNs, pseudo-IPNs, and the respective homopolymers. Their ultimate mechanical properties were obtained and the dynamic glass transition temperatures (Tg's) were found using a thermomechanical analyzer. At all compositions, a single Tg(except 50-50 wt %) was found.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 54 (1994), S. 1643-1650 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Polyurethane-urea anionomer dispersions with different stoichiometric DMPA/polyol and NCO/OH ratios were preapred from poly(oxypropylene)glycol, toluene diisocyanate (TDI), dimethylolpropionic acid (DMPA), and ethylenediamine (EDA). The dispersion-cast films were prepared and characterized by mechanical properties, dynamic mechanical analysis (DMA), and differential scanning calorimetry (DSC). Increasing the hard-segment content by either increasing the DMPA/polyol or the NCO/OH ratios affects the glass transition temperature (Tg) of the soft segments. © 1994 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 8
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    In:  [Talk] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters, 23.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts ; p. 16 .
    Publication Date: 2019-09-23
    Description: Focused gas and fluid flow of cold seep ecosystems is often characterized by carbonate precipitation processes fueled by hydrocarbon-rich fluids and microbial activity. In various geological settings the seabed leakage is methane dominated and accompanied by the formation of long-lasting hard substrates and open channels. These fluid pathways are connecting deeper levels of the sediment column with the bottom water, bridging the diffusive processes at the sediment/water-interface. Understanding and quantifying feedback mechanisms between hydrocarbon-sources, ocean chemistry, and climate requires detailed data about the dynamics of seafloor methane emanation throughout geological time. Authigenic carbonates from these ecosystems represent in many cases unique archives of marine methane emanation by their geobiological, geochemical, mineralogical, and structural inventory. Precise and high resolution geochronology of these archives provides new insights into the rate and duration of precipitation processes, the related microbial activity and a base for the reconstruction of paleoactivity of natural seepage. The actual data set of our compilatory study is spanning a wide range in space and time. It covers different geological circum-Pacific settings (South China Sea, Costa Rica & Nicaragua, Chile, New Zealand), including more than 200 thousand years old archives (Hydrate Ridge, off Oregon) and recent methane-related carbonates from Black Sea and Mediterranean Sea. Special emphasis is actually given to new insights into growth structures, emplacement processes, mineralogy and high resolution geochemistry of mud mound and escarpment related carbonates from the Central American Forearc as well as to new findings on seep systems off Chile (cruise Sonne 210) applying a ROV-operated diamond chain saw sampling system. In a rather complex case study carbonate drill cores decipher the late stage evolution of mound growth and related methane enriched fluid emanation during the last 70 000 years off Costa Rica. A broad range in &13C from -22 to -36‰ (mounds) and -43 to -56‰ (escarpment) is covered, reflecting different hydrocarbon sources and/or varying fluid/seawater-ratios. Whereas the &18O signatures indicate a systematic variation between 3.8 - 5.3‰ (mounds) and 4.2 - 5.1‰ (escarpment) in close correlation with their ages (U-Th geochronology [1]) and the record of seawater evolution. Combining high resolution observations of growth structures (fluorescence microscopy) and analyses of Cl-S-C distribution pattern (electron microprobe) decipher multiple phases of carbonate precipitation separated by micrometer scaled layers of residual organic matter (e.g. 50 alternations on 3 mm). The latter are interpreted to be attached onto crystal surfaces during phases of rather stagnant or low fluid flow, respectively. On long time scales, the circum-Pacific data set indicates sea level decrease as an important enhancement factor for focused fluid flow via increasing pore water buoyancy, destabilization of gas hydrates and related fluxes from underlying free gas deposits upon hydraulic pressure release. Data from tectonically highly active settings imply structural changes as major control on initiation and position of cold seeps and their activation on short time scales [2, 3]. References: [1] Hammerich et al. (2007) Terra Nostra. [2] Kutterolf et al. (2008) Geology, doi: 10.1130/G24806A [3] Liebetrau et al. (2010) MG, doi:10.1016/j.margeo.2010.01.003.〈/p〉
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 9
    Publication Date: 2012-02-23
    Description: Cold seep ecosystems are often characterized by carbonate precipitation processes fueled by methane-rich fluids and microbial activity. Understanding and quantifying feedback mechanisms between methane sources, ocean chemistry, and climate requires detailed data about the dynamics of seafloor methane emanation throughout geological time. Carbonates from these ecosystems provide unique archives of marine methane emanation by their geobiological, geochemical, mineralogical, and structural inventory. Precise and high resolution geochronology of these archives provides new insights into the rate and duration of precipitation processes and the related microbial activity. In this compilatory study large carbonate samples from very different cold seep settings were investigated for the time scales of their formation and their specific precipitation environment. Beside new insights into growth structures, emplacement processes and initial approaches on high resolution geochemistry and biomarker analyses [1], special emphasis was given to the geochronological identification of paleo-seep-activity phases. The actual data set is spanning a wide range in space and time. It covers circum-Pacific settings (South China Sea, Costa Rica & Nicaragua, New Zealand), including more than 200 thousand years old archives ( Hydrate Ridge, off Oregon), and almost recent methane-related carbonates from Black Sea and Mediterranean Sea. On long time scales, the data indicates sea level decrease as an important enhancement factor for focused methane flux via destabilization of underlying gas hydrates upon hydraulic pressure release. Data from tectonically highly active settings imply structural changes as major control on initiation and position of cold seeps and their activation on short time scales [2, 3]. [1] Leefmann et al. (2008) BG. [2] Kutterolf et al. (2008) Geology, doi: 10.1130/G24806A [3] Liebetrau et al. (2010) MG, doi:10.1016/j.margeo.2010.01.003
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 10
    Publication Date: 2012-02-23
    Type: Conference or Workshop Item , NonPeerReviewed
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