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  • 1
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    Introduction: the geology and geophysics of Tenerife (2000)
    In:  Journal of Volcanology and Geothermal Research, Zagreb, 3-4, vol. 103, no. 1-4, pp. vii-x, pp. B06305, (ISSN: 1340-4202)
    Details
    Publication Date: 2000
    Keywords: Review article ; Volcanology ; Spain ; JVGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Calibration of a portable X-ray fluorescence spectrometer in the analysis of archaeological samples using influence coefficients (2014)
    Geological Society of London
    Details
    Publication Date: 2014-07-19
    Description: This paper responds to the expanding interest in archaeology in the use of portable X-Ray fluorescence (pXRF) technologies. Accurate analysis using pXRF requires correction for absorbance and secondary enhancement of the excited element X-rays by the other elements present. Several correction methods are widely used, including fundamental parameters, influence coefficients, Compton ratioing, multi-variate statistical analysis, and dilution. Most pXRF calibrations use either fundamental parameters or multi-variate statistics. However, influence coefficients are known to be the most certain calibration method for XRF analysis of geological materials. Portable XRF calibrations using influence coefficients in the analysis of obsidian, flint, mudbrick, and sediment have far less bias and include a wider range of elements (Mg through Ce) than multi-variate statistical or fundamental parameter calibrations using beam filtered spectra. Bias v. wavelength dispersive XRF data using influence coefficients is mostly less than 1 % for obsidian and flint, and less than 2 % for mudbrick and sediment, in contrast with the large biases (up to 36 %) found using fundamental parameters or multi-variate statistical methods.
    Print ISSN: 1467-7873
    Electronic ISSN: 1467-7873
    Topics: Chemistry and Pharmacology , Geosciences
    Published by Geological Society of London
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  • 3
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    Grafting genetically modified cells to the damaged brain: restorative effects of NGF expression (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-12-16
    Description: Fibroblasts were genetically modified to secrete nerve growth factor (NGF) by infection with a retroviral vector and then implanted into the brains of rats that had surgical lesions of the fimbria-fornix. The grafted cells survived and produced sufficient NGF to prevent the degeneration of cholinergic neurons that would die without treatment. In addition, the protected cholinergic cells sprouted axons that projected in the direction of the cellular source of NGF. These results indicate that a combination of gene transfer and intracerebral grafting may provide an effective treatment for some disorders of the central nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenberg, M B -- Friedmann, T -- Robertson, R C -- Tuszynski, M -- Wolff, J A -- Breakefield, X O -- Gage, F H -- AG06088/AG/NIA NIH HHS/ -- HD20034/HD/NICHD NIH HHS/ -- NS24279/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 16;242(4885):1575-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, University of California School of Medicine, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201248" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholinesterase/metabolism ; Animals ; Brain/cytology/enzymology/*pathology ; Cell Survival ; DNA/genetics ; Fibroblasts/metabolism/*transplantation ; Genetic Vectors ; Histocytochemistry ; Moloney murine leukemia virus/genetics ; Nerve Growth Factors/genetics/*physiology ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Direct gene transfer into mouse muscle in vivo (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-03-23
    Description: RNA and DNA expression vectors containing genes for chloramphenicol acetyltransferase, luciferase, and beta-galactosidase were separately injected into mouse skeletal muscle in vivo. Protein expression was readily detected in all cases, and no special delivery system was required for these effects. The extent of expression from both the RNA and DNA constructs was comparable to that obtained from fibroblasts transfected in vitro under optimal conditions. In situ cytochemical staining for beta-galactosidase activity was localized to muscle cells following injection of the beta-galactosidase DNA vector. After injection of the DNA luciferase expression vector, luciferase activity was present in the muscle for at least 2 months.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolff, J A -- Malone, R W -- Williams, P -- Chong, W -- Acsadi, G -- Jani, A -- Felgner, P L -- HD00669-05/HD/NICHD NIH HHS/ -- HD03352/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1990 Mar 23;247(4949 Pt 1):1465-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Waisman Center, University of Wisconsin, Madison 53706.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1690918" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avian Sarcoma Viruses/genetics ; Beetles/genetics ; Chloramphenicol O-Acetyltransferase/biosynthesis/genetics ; DNA/genetics ; Escherichia coli/genetics ; *Gene Expression ; Genetic Vectors ; Histocytochemistry ; Luciferases/biosynthesis/genetics ; Mice ; Muscles/*enzymology ; RNA/genetics ; *Transfection ; beta-Galactosidase/biosynthesis/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Spatial and temporal trends in pre-caldera Jemez Mountains volcanic and fault activity (2013)
    Geological Society of America (GSA)
    In: Geosphere
    Details
    Publication Date: 2013-06-01
    Description: New 40 Ar/ 39 Ar dates from the Jemez Mountain volcanic field (JMVF) reveal formerly unrecognized shifts in the loci of pre-caldera volcanic centers across the northern Jemez Mountains; these shifts are interpreted to coincide with episodes of Rio Grande rift faulting. Early activity in the field includes two eruptive pulses: 10.8–9.2 Ma basaltic to dacitic volcanism on Lobato Mesa in the northeastern JMVF and 12–9 Ma mafic to silicic volcanism in the southwestern JMVF. While 9–7 Ma eruptions persisted in the southern JMVF, a new eruptive center developed on the La Grulla Plateau in the northwestern JMVF (8.7–7.2 Ma), corresponding with a period of rift widening caused by reactivation of Laramide faults in this area. The older 8.7–7.8 Ma mafic lavas emitted from Encino Point and the younger 7.7–7.2 Ma trachyandesite and dacite erupted on the La Grulla Plateau are assigned to a new unit called the La Grulla Formation. The chemical composition of a 640 m stack of lava flows exposed in the northern margin of the Valles caldera changes from dacite to andesite, then back to dacite upsection, becoming slightly more alkalic upward. The shift to more alkalic compositions occurs across a sedimentary break, marking a subtle change in magma source for the older Paliza Canyon Formation and the younger La Grulla Formation lavas. New age constraints from a rhyolite intrusion in the southern JMVF and pumiceous rhyolite deposits in the northern JMVF suggest an episode of localized, 7.6–7.8 Ma rhyolitic volcanism that occurred in the central part of the JMVF between 12–8 Ma Canovas Canyon Rhyolite and 7–6 Ma peak Bearhead Rhyolite volcanism. Younger Bearhead Rhyolite intrusions (7.1–6.5 Ma) are more widespread than previously documented, extending into the northeastern JMVF. Tschicoma Formation dacite erupted at 5 Ma in the Sierra de los Valles and then erupted throughout the northeastern JMVF 5–2 Ma. The more refined geochronology of the JMVF indicates that pre-caldera volcanic centers were characterized by geographically and chemically distinct, relatively short-lived, episodes of activity. Volcanism generally migrated eastward through time in the southern JMVF, but the pattern in the northern JMVF had a more complex east (10–9 Ma) to west (9–7 Ma) to east (5–2 Ma) pattern that reflects the timing of motion on faults. The new ages, coupled with detailed mapping of both volcanic rocks and the Santa Fe Group, document significant pulses of faulting, erosion, and deposition during middle Miocene time and during late Miocene time across the Cañones fault zone in the northern JMVF.
    Electronic ISSN: 1553-040X
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 6
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    Clonal characteristics of experimentally induced "atherosclerotic" lesions in the hybrid hare (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-12-21
    Description: The female hybrid hare (Lepus timidus x Lepus europaeus) is heterozygous for electrophoretically separable, X-linked isoenzymes of glucose-6-phosphate dehydrogenase. The isoenzymes of this animal have been used as cellular markers in the study of the clonal origins of experimentally induced atherosclerotic lesions. Aortic lesions produced in the hybrid hare by feeding cholesterol and injuring the aortic wall with a catheter have been shown to have polyclonal characteristics and in this way are fundamentally different from atherosclerotic fibrous plaques in man.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pearson, T A -- Dillman, J -- Williams, K J -- Wolff, J A -- Adams, R -- Solez, K -- Heptinstall, R H -- Malmros, H -- Sternby, N -- New York, N.Y. -- Science. 1979 Dec 21;206(4425):1423-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/505016" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arteriosclerosis/enzymology/*pathology ; Catheterization/methods ; Clone Cells/enzymology/*pathology ; Diet, Atherogenic ; *Disease Models, Animal ; Glucosephosphate Dehydrogenase/metabolism ; Isoenzymes/metabolism ; Rabbits
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
    Electronic Resource
    Electronic Resource
    EFFECTS OF ENVIRONMENTAL CHEMICALS ON THE METABOLISM OF DRUGS, CARCINOGENS, AND NORMAL BODY CONSTITUENTS IN MAN (1971)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 179 (1971), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1971.tb46897.x
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Peridotite xenoliths in basalts and mantle dynamics (1980)
    [s.l.] : Nature Publishing Group
    Nature 288 (1980), S. 103-103 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] BASU1 has described jointed and angular xenoliths of mantle peridotite in alkali basalts from California. He considers their morphology to be due to brittle fracture at the site where the xenoliths were incorporated into the rising magma, and thus to be representative of dynamic conditions in the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/288103a0
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  • 9
    Electronic Resource
    Electronic Resource
    Comment on‘A reappraisal of ignimbrite emplacement: progressive aggradation and particulate to non-particulate flow transitions during emplacement of high-grade ignimbrite’by MJ Branney and P Kokelaar (1994)
    Springer
    Bulletin of volcanology 56 (1994), S. 134-137 
    Details
    ISSN: 1432-0819
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: en masse deposition from a dense pyroclastic flow is untenable for the majority of cases. In its place, they advocate a mechanism of progressive aggradation at the base of a moving flow, similar to that proposed by Fisher (1966). Although Fisher’s mechanism has been invoked for certain ignimbrite facies such as veneer deposits (Wilson 1985), Branney and Kokelaar’s paper (BK hereafter) marks a significant departure from dominant thinking in rejecting any significant role for en masse deposition in the formation of any portion of an ignimbrite, including thick, massive valley-ponded units. Many of their points are well taken, and we wish to state at the beginning of this commentary that we agree that their basic proposal of incremental deposition provides a satisfactory explanation of several common ignimbrite features, such as laterally discontinuous ‘flow-unit’ partings and the dispositions of directional fabrics in non-welded and partly welded ignimbrites. In these cases, the depositional origin of such fabrics is clear, and the possible analogies with sediment gravity flows, consisting of dispersions of rigid particles in fluid, certainly deserve further exploration. The main part of BK is, however, concerned with the more complex case of high-grade ignimbrites, in which the effects of particle cohesion and plasticity must be taken into account, as must the possibility of destruction of depositional features by later post-emplacement hot-state slumping (commonly termed rheomorphism). It is fair to say that there has never been a consensus on the origin of flow structures in densely welded ignimbrites; this is in part a consequence of the lack of ignimbrite deposition models that are consistent with all the field evidence, one of the problems that Branney and Kokelaar tackle. We take this opportunity to discuss aspects of this difficulty in the light of their application of the progressive aggradation model to preserved structures in high-grade ignimbrites. We select three specific points. Firstly, we question some of BK’s proposed terminology; secondly, the significance of imbrication in ignimbrites requires further consideration; thirdly, we draw attention to the probable low preservation potential of structures produced by syn-depositional plastic deformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304109
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  • 10
    Electronic Resource
    Electronic Resource
    Comment on ‘A reappraisal of ignimbrite emplacement: progressive aggradation and particulate to non-particulate flow transitions during emplacement of high-grade ignimbrite’ by MJ Branney and P Kokelaar (1994)
    Springer
    Bulletin of volcanology 56 (1994), S. 134-137 
    Details
    ISSN: 1432-0819
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304109
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