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  • Books
  • Articles  (320)
  • 2020-2024  (45)
  • 1985-1989  (275)
  • Medicine  (162)
  • Geosciences  (160)
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  • Books
  • Articles  (320)
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  • 1
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    Clinical experience in 20 hepatic resections for peripheral cholangiocarcinoma (1989)
    Wiley
    Details
    Publication Date: 1989-12-01
    Print ISSN: 0008-543X
    Electronic ISSN: 1097-0142
    Topics: Biology , Medicine
    Published by Wiley on behalf of American Cancer Society.
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  • 2
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    In-depth learning of automatic segmentation of shoulder joint magnetic resonance images based on convolutional neural networks (2021)
    Elsevier
    Details
    Publication Date: 2021-11-01
    Print ISSN: 0169-2607
    Electronic ISSN: 1872-7565
    Topics: Biology , Medicine
    Published by Elsevier
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  • 3
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    Adult stem cell transplantation combined with conventional therapy for the treatment of end-stage liver disease: a systematic review and meta-analysis (2021)
    BioMed Central
    Details
    Publication Date: 2021-10-30
    Description: End-stage liver disease (ESLD) is characterized by the deterioration of liver function and a subsequent high mortality rate. Studies have investigated the use of adult stem cells to treat ESLD. Here, a systematic review and meta-analysis was conducted to determine the efficacy of a combination therapy with adult stem cell transplantation and traditional medicine for treating ESLD. Four databases—including PubMed, Web of Science, Embase, and Cochrane Library—were investigated for studies published before January 31, 2021. The main outcome indicators were liver function index, model for end-stage liver disease (MELD) scores, and Child‒Turcotte‒Pugh (CTP) scores. Altogether, 1604 articles were retrieved, of which eight met the eligibility criteria; these studies included data for 579 patients with ESLD. Combination of adult stem cell transplantation with conventional medicine significantly improved its efficacy with respect to liver function index, CTP and MELD scores, but this effect gradually decreased over time. Moreover, a single injection of stem cells was more effective than two injections with respect to MELD and CTP scores and total bilirubin (TBIL) and albumin (ALB) levels, with no significant difference in aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels. With respect to the TBIL levels, patients receiving mononuclear cells (MNCs) experienced a significantly greater therapeutic effect—starting from twenty-four weeks after the treatment—whereas with respect to ALB levels, CD34+ autologous peripheral blood stem cells (CD34+ APBSCs) and MNCs had similar therapeutic effects. Severe complications associated with adult stem cell treatment were not observed. Although the benefits of combination therapy with respect to improving liver function were slightly better than those of the traditional treatment alone, they gradually decreased over time.Systematic review registration: PROSPERO registration number: CRD42021238576.
    Electronic ISSN: 1757-6512
    Topics: Biology , Medicine
    Published by BioMed Central
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  • 4
    Electronic Resource
    Electronic Resource
    Tsunami risk in northwestern Europe: a Holocene example (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Terra nova 1 (1989), S. 0 
    Details
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A thin, regionally extensive, laterally persistent sand layer is present within the Holocene coastal sequences of eastern Scotland, dated to 7000 yr BP. It is proposed that this deposit was caused by a tsunami wave generated by a catastrophic submarine landslide (the Second Storegga Slide) on the Norwegian continental slope. The distribution of this tsunami deposit indicates that the wave penetrated at least 2 km beyond the contemporary coastline and a minimum of 4 m above the contemporary high-water mark. Although the frequency of tsunamis may be low in this region their effects should be considered for very long-term or very sensitive strategic developments at coastal sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3121.1989.tb00429.x
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  • 5
    Electronic Resource
    Electronic Resource
    Dissolved Inorganic Carbon in the Tucson Basin Aquifer (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 27 (1989), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: The concentration of dissolved inorganic carbon (DIC) species and the other major ionic constituents were determined at 45 sampling locations within the Tucson basin aquifer. The distribution and concentration of the various inorganic carbon species were related to the hydrogeological characteristics of the principal recharge zones within this alluvial basin. Bicarbonate alkalinity concentrations were highest subjacent to a floodplain where calcite and other relict salts likely precipitated in the shallow subsurface under past pluvial conditions.Calculated partial pressure of carbon dioxide (PCO2) values were highest where the water table is sufficiently elevated to support phreatophyte growth. The regional distribution of PCO2 suggests that the generation of carbon dioxide is limited to the oxidation of influent plant detritus below the stream channels. The alkalinization of Tucson basin ground water is ultimately constrained by this limited production of CO2. The dissolution of calcite in young ground water (〈200 years) and the precipitation of calcite in deeper, more chemically evolved ground water likely represent other important controls upon DIC concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1989.tb00006.x
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  • 6
    Electronic Resource
    Electronic Resource
    Monitoring Dissolved Oxygen in Ground Water: Some Basic Considerations (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water monitoring & remediation 8 (1988), S. 0 
    Details
    ISSN: 1745-6592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Dissolved oxygen (D.O.) concentration has a significant effect upon ground water quality by regulating the valence state of trace metals and by constraining the bacterial metabolism of dissolved organic species. For these reasons, the measurement of dissolved oxygen concentration should be considered essential in most water quality investigations. D.O. measurements have been frequently neglected in ground water monitoring. This is because O2 has often been assumed absent below the water table; measurement of O2, concentrations is not mandated by drinking water standards; and the redox potential has previously been considered an adequate and encompassing electrochemical measurement. Redox potentials, however, cannot adequately predict dissolved oxygen concentrations nor can D.O. concentrations be used to calculate redox potentials.D.O. concentrations can be measured precisely in the field by titration or electrode methods. The best methods of sample recovery are those that use positive pressure displacement devices. A fully adequate sampling procedure will isolate ground water from the atmosphere and will collect samples at restricted depth intervals at ambient temperature and pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6592.1988.tb00981.x
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  • 7
    Electronic Resource
    Electronic Resource
    Occurrence of salmonid fish infected with Renibacterium salmoninarum in the Pacific Ocean (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 9 (1986), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1986.tb01013.x
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  • 8
    Electronic Resource
    Electronic Resource
    Multiple small-angle neutron scattering characterization of the densification of ceramics: application to microporous silica (1989)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 22 (1989), S. 539-545 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Multiple small-angle neutron scattering was used to characterize the microstructure evolution of porous silica as a function of thermal processing. This new technique offers a statistically significant determination of microstructure morphology in the 0.08–10 μm range, which was previously inaccessible without increasing the resolution of the currently available scattering spectroscopy beamlines. All of the scatterers, which in the present work are pores within ceramic bodies, are measured whether they are open or closed. Earlier mercury porosimetry and nitrogen desorption measurements of the microporous silica system indicated that there are two major populations of pores in this material, differing in pore size by approximately an order of magnitude. In this work, it was found that densification during the intermediate stages of sintering is accompanied by coarsening to radii 〉 0.22 μm within the population of large pores in microporous silica. In the late stages of sintering, there are no detectable pores with radii 〉 0.08 μm, and radii of gyration equal to 33 and 28 nm were measured. Finally, Monte Carlo simulations were carried out to complement the neutron-scattering measurements, to predict the influence on the results of the bimodal distribution, and to explore the sensitivity of the multiple-scattering method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889889007119
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  • 9
    Electronic Resource
    Electronic Resource
    Single-crystal structure of rapidly cooled alloys with icosahedral symmetry. I. experimental analysis (1986)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 42 (1986), S. 156-164 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Crystallographic analysis is applied to a set of electron diffraction patterns taken from a rapidly cooled Al-Mn alloy to construct reciprocal-lattice patterns in agreement with the observed icosahedral results. The analysis leads to a proposed atomic scale model which is derived from two sets of experimental modulations, each of which has six independent modulation vectors. The underlying structure has a lattice, the unit cell of which involves 32 atomic sites with the required symmetry properties. The appearance of the experimental electron diffraction patterns is explained either by the coherent arrangement of this lattice with an irrational sublattice or by an independent set of modulations. The relationship of this structure to three-dimensional nonperiodic Penrose tilings is explored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767386099609
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  • 10
    Electronic Resource
    Electronic Resource
    Single-crystal structure of rapidly cooled alloys with icosahedral symmetry. II. Theoretical analysis - internal modulations (1986)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 42 (1986), S. 164-172 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The icosahedral cubic cell, derived in the first of this set of two papers, is further developed. Rules for the occupancy of atomic sites are derived based on periodic modulations over the reference lattice. The form of the derived structure, which involves partial Fibonacci sequence stacking, suggests that the true structure is the limit of a superposition of successively larger periodic sequences. The structure factor for the limiting (nonperiodic) structure is derived and some physical insights into the application of almost periodic functions to icosahedral phase Al-Mn are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767386099592
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