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  • 1
    Series available for loan
    Series available for loan
    An 800,000-year paleoclimatic record from Core OL-92, Owens Lake, southeast California (1997)
    Boulder, Colo. : Geological Society of America
    Associated volumes
    Details Availability
    Call number: AWI G5-00-0046
    In: Special paper / The Geological Society of America, 317
    Type of Medium: Series available for loan
    Pages: v, 165 Seiten , Illustrationen
    ISBN: 0-8137-2317-5
    Series Statement: Special paper / The Geological Society of America 317
    Language: English
    Note: Contents: Preface. - 1. Core OL-92 from Owens Lake: Project rationale, geologic setting, drilling procedures, and summary / G. I. Smith and J. L. Bischoff. - 2. Stratigraphy, lithologies, and sedimentary structures of Owens Lake core OL-92 / G. I. Smith. - 3. Climatic signals in clay mineralogy and grain-size variations in Owens Lake core OL-92, southeast California / K. M. Menking. - 4. Responses of sediment geochemistry to climate change in Owens Lake sediment: An 800-k.y. record of saline/fresh cycles in core OL-92 / J. L. Bischoff, J. P. Fitts, and J. A. Fitzpatrick. - 5. Movement and diffusion of pore fluids in Owens Lake sediments from core OL-92 as shown by salinity and deuterium-hydrogen ratios / I. Friedman, J. L. Bischoff, C. A. Johnson, S. W. Tyler, and J. P. Fitts. - 6. Paleomagnetism and magnetic susceptibility of Pleistocene sediments from drill hole OL-92, Owens Lake, California / J. M. Glen and R. S. Coe. - 7. Age and correlation of tephra layers, position of the Matuyama-Brunhes chron boundary, and effects of Bishop ash eruption on Owens Lake, as determined from drill hole OL-92, southeast California / A. M. Sarna-Wojcicki, C. E. Meyer, and E. Wan. - 8. A time-depth scale for Owens Lake sediments of core OL-92: Radiocarbon dates and constant mass-accumulation rate / J. L. Bischoff, T. W. Stafford, Jr., and M. Rubin. - 9. A diatom-based paleohydrologic record of climate change for the past 800 k.y. from Owens Lake, California / J. P. Bradbury. - 10. Ostracodes in Owens Lake core OL-92: Alternation of saline and freshwater forms through time / C. Carter. - 11. Paleobiotic and isotopic analysis of mollusks, fish, and plants from core OL-92: Indicators for an open or closed lake system / J. R. Firby, S. E. Sharpe, J. F. Whelan, G. R. Smith, and W. G. Spaulding. - 12. An 800,000-year pollen record from Owens Lake, California: Preliminary analyses / R. J. Litwin, D. P. Adam, N. O. Frederiksen, and W. B. Woolfenden. - 13. Synthesis of the paleoclimatic record from Owens Lake core OL-92 / G. I. Smith, J. L. Bischoff, and J. P. Bradbury. - Index.
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetic Analysis and Subambient Temperature Chromatography of an Active Ester (1995)
    s.l. : American Chemical Society
    Analytical chemistry 67 (1995), S. 2292-2295 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00109a059
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  • 3
    Electronic Resource
    Electronic Resource
    Integration complexes derived from HIV vectors for rapid assays in vitro (1999)
    [s.l.] : Nature America Inc.
    Nature biotechnology 17 (1999), S. 578-582 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] Of three enzymes encoded by HIV–reverse transcriptase, protease, and integrase—only the first two have been exploited clinically as inhibitor targets. Efforts to develop inhibitors of purified integrase protein have yielded many compounds, but none with clinical utility. A different ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/9886
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  • 4
    Electronic Resource
    Electronic Resource
    Semaphorin III can repulse and inhibit adult sensory afferents in vivo (1997)
    [s.l.] : Nature Publishing Group
    Nature medicine 3 (1997), S. 1398-1401 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] During development, semaphorins (collapsin, fasciclin) mediate repulsive and inhibitory guidance of neurons1–4. Semaphorin III, a secretable member of this family, is expressed by the ventral spinal cord at the time corresponding to projection of sensory afferents from the dorsal root ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm1297-1398
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  • 5
    Electronic Resource
    Electronic Resource
    Tempering of Iron-Carbon-Nitrogen Martensites: (Re) Distribution of Interstitial Atoms (1999)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 318-320 (Oct. 1999), p. 103-108 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/04/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.318-320.103.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Late Quaternary climates and limnology of the Lake Winnebago basin, Wisconsin, based on ostracodes (1997)
    Springer
    Journal of paleolimnology 18 (1997), S. 249-260 
    Details
    ISSN: 1573-0417
    Keywords: Quaternary ; paleoclimates ; paleolimnology ; ostracodes ; Wisconsin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Ostracodes document a series of late Quaternary climatic and limnologic changes within the Lake Winnebago basin of east-central Wisconsin. Using a 14 C, 137Cs, and 210Pb-based geochronology, Lake Winnebago ostracode abundances were compared to regional patterns of ostracode biogeography and the paleontological, sedimentological, and geochemical records of Elk Lake (Clearwater County), Minnesota, in order to interpret past temperature and hydrochemical changes in Lake Winnebago. Lake Winnebago sediments contain five major ostracode species, Candona ohioensis, Candona rawsoni, Cytherissa lacustris, Limnocythere verrucosa, and Physocypria pustulosa. In combination with sedimentology and geochronology, variations in the abundances of these species allow the late Quaternary record of the Lake Winnebago basin to be subdivided into five major climatic intervals: (1) glacial to post-glacial (15.5–11.0 ka), (2) cold and variable immediate post-glacial (11.0–10.4 ka), (3) warmer and wet early Holocene (10.4–7.8 ka), (4) warm but not particularly dry middle Holocene (7.8–4.2 ka), and (5) warm and moist late Holocene (4.2 ka-present).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007930402632
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  • 7
    Electronic Resource
    Electronic Resource
    J. J. Thomson and The Electron: 1897–1899 An Introduction (1997)
    Springer
    The chemical educator 2 (1997), S. 1-42 
    Details
    ISSN: 1430-4171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Three Seminal Papers of J. J. Thomson This being the 100th anniversary of J. J. Thomson’s discovery of the electron, the October 1897 paper in which he presented his case that cathode rays are streams of subatomic “corpuscles” is attracting a great deal of attention. Viewed from 100 years later, this paper stands out as the starting point for the research into the structure of the atom that has dominated 20th-century science. Viewed in its original historical context, however, this paper was but one of a group by Thomson and his Cavendish Laboratory research students and is matched in importance by his two ensuing papers: “On the Charge of Electricity carried by the Ions produced by Röntgen Rays” published in December 1898 and “On the Masses of the Ions in Gases at Low Pressures” published in December 1899. All three of these seminal papers, which appeared in the prestigious Philosophical Magazine, are included here, along with the published text of Thomson’s talk of April 30, 1897, in which he first put the subatomic proposal forward and George Fitzgerald’s commentary on this talk.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00897970149a
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of formic acid hydrolysis on the quantitative analysis of radiation-induced DNA base damage products assayed by gas chromatography/mass spectrometry (1996)
    Springer
    Radiation and environmental biophysics 35 (1996), S. 41-53 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract Gas chromatography/mass spectrometry (GC/MS-SIM) is an excellent technique for performing both qualitative and quantitative analysis of DNA base damage products that are formed by exposure to ionizing radiation or by the interaction of intracellular DNA with activated oxygen species. This technique commonly uses a hot formic acid hydrolysis step to degrade the DNA to individual free bases. However, due to the harsh nature of this degradation procedure, the quantitation of DNA base damage products may be adversely affected. Consequently, we examined the effects of various formic acid hydrolysis procedures on the quantitation of a number of DNA base damage products and identified several factors that can influence this quantitation. These factors included (1) the inherent acid stabilities of both the lesions and the internal standards; (2) the hydrolysis temperature; (3) the source and grade of the formic acid; and (4) the sample mass during hydrolysis. Our data also suggested that theN,O-bis (trimethylsilyl)trifluoroacetamide (BSTFA) derivatization efficiency can be adversely affected, presumably by trace contaminants either in the formic acid or from the acid-activated surface of the glass derivatization vials. Where adverse effects were noted, modifications were explored in an attempt to improve the quantitation of these DNA lesions. Although experimental steps could be taken to minimize the influence of these factors on the quantitation of some base damage products, no single procedure solved the quantitation problem for all base lesions. However, a significant improvement in the quantitation was achieved if the relative molecular response factor (RMRF) values for these lesions were generated with authentic DNA base damage products that had been treated exactly like the experimental samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01211242
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  • 9
    Electronic Resource
    Electronic Resource
    In search of dark horses: Affinity maturation of phage-displayed ligands (1996)
    Springer
    Molecular diversity 2 (1996), S. 2-4 
    Details
    ISSN: 1573-501X
    Keywords: Phage display ; Receptor ligands ; Affinity maturation ; Ribonuclease S-protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Most combinatorial libraries are ‘sparse’ in that only a tiny fraction of the relevant class of compounds is represented. This sparseness can be compensated in some measure by alternating rounds of selection with rounds of mutagenesis. Thus, clones are selected from the initial library by some criterion of ‘fitness’, such as affinity for a particular receptor. The selected clones are then mutagenized to generate a mutant library, which serves as input to the next round of selection, and so on. If the first round of selection is too stringent, rejecting all but the very fittest clone in the initial library (the ‘initial champion’), we might miss ‘dark horses’; clones in the initial library that are inferior to the initial champion, yet can be mutated to even higher fitness than can that champion. A more thoughtful strategy is to alternate nonstringent selection with simultaneous mutagenesis of many selected clones en masse.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01718693
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  • 10
    Electronic Resource
    Electronic Resource
    Knowledge Discovery in an Oceanographic Database (1999)
    Springer
    Applied intelligence 11 (1999), S. 135-148 
    Details
    ISSN: 1573-7497
    Keywords: knowledge discovery ; machine learning ; texture ; feature selection ; image processing ; clusturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Knowledge discovery from image data is a multi-step iterative process. This paper describes the procedure we have used to develop a knowledge discovery system that classifies regions of the ocean floor based on textural features extracted from acoustic imagery. The image is subdivided into rectangular cells called texture elements (texels); a gray-level co-occurence matrix (GLCM) is computed for each texel in four directions. Secondary texture features are then computed from the GLCM resulting in a feature vector representation of each texel instance. Alternatively, a region-growing approach is used to identify irregularly shaped regions of varying size which have a homogenous texture and for which the texture features are computed. The Bayesian classifier Autoclass is used to cluster the instances. Feature extraction is one of the major tasks in knowledge discovery from images. The initial goal of this research was to identify regions of the image characterized by sand waves. Experiments were designed to use expert judgements to select the most effective set of features, to identify the best texel size, and to determine the number of meaningful classes in the data. The region-growing approach has proven to be more successful than the texel-based approach. This method provides a fast and accurate method for identifying provinces in the ocean floor of interest to geologists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008395129406
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