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  • 1
    Electronic Resource
    Electronic Resource
    The traveltime perturbations for seismic body waves in factorized anisotropic inhomogeneous media (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 107 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The traveltime perturbation equations for the quasi-compressional and the two quasi-shear waves propagating in a factorized anisotropic inhomogeneous (FAI) media are derived. The concept of FAI media simplifies considerably these equations. In the FAI medium, the density normalized elastic parameters aijkl(Xi) can be described by the relation aijkl(Xi) =f2(xi)Aijkl, where Aijkl are constants, independent of coordinates xi and f2(xi) is a continuous smooth function of xi. The types of anisotropy (Aijkl) and inhomogeneity [f(xi)] are not restricted. The traveltime perturbations of individual seismic body waves (qP, qS1 and qS2) propagating in the FAI medium depend, of course, both on the structural pertubations [δf2(xi)] and on the anisotropy perturbations (δAijkl), but both these effects are fully separated. The perturbation equations for the time delay between the two qS-waves propagating in the FAI medium are simplified even more. If the unperturbed (background) medium is isotropic, the perturbation of the time delay does not depend on the structural perturbations (δf2(xi) at all. This striking result, valid of course only in the framework of first-order perturbation theory, will simplify considerably the interpretation of the time delay between the two split qS-waves in inhomogeneous anisotropic media. Numerical examples are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb00822.x
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  • 2
    Electronic Resource
    Electronic Resource
    Pericardial Complications of Cardiac Surgery: Emphasis on the Diagnostic Role of Echocardiography (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 7 (1992), S. 0 
    Details
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Pericardial effusions are common following cardiac surgery; uncommonly they are large in size and may cause tamponade, either in the early or late postoperative period. Such effusions causing tamponade may be circumcardiac, but are frequently loculated, in which case one or more cardiac chambers is selectively compressed. Fortunately, echocardiography is capable of imaging not only the presence, location, and size of the pericardial effusion, but also indicating the presence of tamponade. Constrictive pericarditis resulting from cardiac surgery is being recognized with increasing frequency and has been associated with various echocar-diographic abnormalities. This review also discusses certain other pericardial complications of cardiac surgery including supraventricular arrhythmias, chylopericardium, and posttransplant problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8191.1992.tb00811.x
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  • 3
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    Héctor H. Orjuela, "La búsqueda de lo imposible: Biografía de José Asunción Silva" (Book Review) (1994)
    Philadelphia : Periodicals Archive Online (PAO)
    Hispanic Review. 62:1 (1994:Winter) 153-155 
    Details
    ISSN: 0018-2176
    Topics: Romance Studies
    Notes: REVIEWS
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1098-1994-062-01-000033
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic moment of the 96.7 keV 9/2+ level in79Rb (1994)
    Springer
    The European physical journal 349 (1994), S. 129-131 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ky ; 25.55.−e ; 27.50.+e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theg-factor of the 9/2+ 96.7 keV excited state with a half-lifeT 1/2=18.6(5) ns in79Rb populated in the79Br(3He, 3n) reaction has been measured by the TDPAD method. The experimentalg-factorg exp=+1.117(16) has been analysed in the frame of particle-rotor models and gave evidence for a large deformation of this state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291170
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  • 5
    Electronic Resource
    Electronic Resource
    Porcine heparin increases postoperative bleeding in cardiopulmonary bypass patients (1990)
    Springer
    Cardiovascular drugs and therapy 4 (1990), S. 269-272 
    Details
    ISSN: 1573-7241
    Keywords: thrombocytopenia ; platelet aggregation ; cardiopulmonary bypass ; heparin ; postoperative bleeding ; protamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary One hundred thirteen patients undergoing cardiopulmonary bypass were randomly assigned to receive either bovine or porcine heparin. Heparin was infused at 4.5 mg/kg during bypass and administered at the lesser of 70 units/kg or 5000 units/dose at 12-hour intervals postoperatively. Platelet counts decreased to 45% of preoperative levels during the first 3 days postoperatively (porcine, 44±13%, n =50; bovine, 46±15%), but returned to preoperative levels by the seventh postoperative day. The average blood loss in the porcine heparin group significantly exceeded that of the bovine heparin group (porcine, 1350.7±727.8 ml; bovine, 1059.6±381.0 ml; p〈.01). Consequently, the platelet transfusion requirement was greater in the porcine heparin group (porcine, 1.7±3.9 units; bovine, 0.5±1.7 units; p〈.05); however, blood and blood component (with the exception of platelets) administration was not significantly different between the two groups. The four patients taking anticoagulants or antiinflammatory agents in the porcine group required a mean of 8.5 units of red blood cells (RBC) plus supplemental platelets. The seven such patients in the bovine group received a mean of 3.0 units of RBC and no platelets. Thus, the use of porcine heparin resulted in a generalized increase in postoperative bleeding with increased management problems in patients undergoing cardiopulmonary bypass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01857644
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  • 6
    Electronic Resource
    Electronic Resource
    Scanning microcalorimetry and circular dichroism study of melting of the natural polypeptides in the left-handed helical conformation (1993)
    Springer
    The protein journal 12 (1993), S. 85-91 
    Details
    ISSN: 1573-4943
    Keywords: Linker histones ; β-endorphin ; ACTH ; Circular dichroism ; scanning microcalorimetry ; poly-l-proline II conformation ; non-cooperative melting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract It has been shown that in aqueous solution histone H1 and H5 C-terminal fragments and peptide hormones β-endorphin and ACTH adopt preferably the left-handed helical conformation of the poly-l-proline II type. Scanning microcalorimetry and circular dichroism have been used to show that the linear temperature dependence of CD maximum amplitude and partial heat capacity value are broken in the temperature interval between 50 and 60°C, after which [C] p reaches the constant level. It was proposed to be due to noncooperative disordering of the conformation caused by the destruction of the polypeptide hydration shell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01024919
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  • 7
    Electronic Resource
    Electronic Resource
    Circulating phospholipase A2 activity associated with sepsis and septic shock is indistinguishable from that associated with rheumatoid arthritis (1991)
    Springer
    Inflammation 15 (1991), S. 355-367 
    Details
    ISSN: 1573-2576
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Elevation of circulating phospholipase A2 (PLA2) activity is associated with sepsis and septic shock. Elevated levels of PLA2 activity also are seen in association with chronic inflammatory disorders such as rheumatoid arthritis. The relationship between these phospholipases is unclear. We have developed a highly specific enzyme-linked immunosorbent assay (ELISA) capable of measuring human synovial PLA2 in plasma, using monoclonal antibodies raised to recombinant synovial PLA2. This ELISA has been used to quantitate circulating PLA2 levels in patients clinically diagnosed with sepsis. These elevated levels positively correlated with the elevation seen in plasma PLA2 enzyme activity. The antibodies also have been used to purify immunoreactive PLA2 from plasma of patients with sepsis, thus enabling characterization of the purified protein by amino-terminal sequence analysis. We conclude from this study that the increase in PLA2 activity seen in association with sepsis and septic shock results from a dramatic elevation in levels of a circulating PLA2 enzyme. This inflammatory PLA2 is indistinguishable, both immunologically and chemically, from that associated with rheumatoid arthritis. Therapeutic agents directed towards inhibition of this inflammatory PLA2 enzyme may have utility in the treatment of both chronic and acute inflammatory disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00917352
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  • 8
    Electronic Resource
    Electronic Resource
    Nonuniform size distribution of nascent globin peptides, evidence for pause localization sites, and a cotranslational protein-folding model (1991)
    Springer
    The protein journal 10 (1991), S. 445-453 
    Details
    ISSN: 1573-4943
    Keywords: Nonrandom codon utilization ; nonuniform translation ; nascent peptides ; three-dimensional protein structure ; cotranslational folding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Examination of nascent globin peptides accumulatingin vitro during globin synthesis in rabbit reticulocyte lysates was carried out. A view was supported that nonrandom distribution of codons with different usage frequencies in mRNA may determine the messenger's translation kinetics. Regions of reduced translation of α- and β-globin polypeptide chains were localized, and the cotranslational protein-folding model suggested previously was substantiated. An active conjunction of synthesis and folding of proteins was proposed as one of the main destinations of a translation nonuniformity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01025472
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  • 9
    Electronic Resource
    Electronic Resource
    Accumulation profiles during quasi-uniform multiple dosing regimens (1993)
    Springer
    Journal of pharmacokinetics and pharmacodynamics 21 (1993), S. 479-485 
    Details
    ISSN: 1573-8744
    Keywords: linear pharmacokinetics ; multiple dosing ; steady state ; rate of accumulation ; mean concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An extension of the plasma area method of Chiou to the evaluation of accumulation profiles during quasiuni-form multiple dosing regimens (i.e., regimens with varying doses and/or dosing intervals within a certain time period which are repeated in the successive periods throughout the administration course) is presented. The derivations show, that the equations for the accumulation and steady state curves during quasi-uniform multiple dosing are similar or identical to these for the uniform multiple dosing case, if the constant time interval in the latter is replaced by the constant time period in the former. The equations derived can be used for rapid estimation of the time, required to reach a prespecified fraction of quasi steady state plasma level during quasi-uniform multiple dosing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061692
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of vacuum mixing on the mechanical properties of antibiotic-impregnated polymethylmethacrylate bone cement2 (1990)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 24 (1990), S. 573-580 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Polymethylmethacrylate bone cement, containing either no added antibiotic, 0.5 g of Vancomycin, 1.0 g of Vancomycin, or 1.0 g of Tobramycin, was mixed either in air or a vacuum chamber. Following storage in a water bath at 37°C for 48 h, the specimens were tested in four-point bending. The porosity of the specimens was assessed radiographically, and their antibacterial activity was monitored for 21 days. The bending strength of the vacuum mixed specimens containing no antibiotic was 40% greater than that of similar air-mixed specimens. However, there were no significant differences in the bending strength of either the air-or vacuum-mixed specimens when any of the antibiotic dosages were added. The bending modulus of the vacuum-mixed specimens, containing no antibiotic, was significantly greater than the moduli of all the other specimen groups which did not differ from each other. Vacuum mixing reduced the apparent porosity of the specimens fivefold, and while the addition of antibiotic did not effect porosity of the air-mixed specimens, that of the vacuum-mixed specimens was doubled. Although initial rapid decreases were seen, leaching of antibiotic from the cement and antibacterial activity continued through the 21-day monitoring period.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820240504
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