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  • 1
    Electronic Resource
    Electronic Resource
    Antibodies to brain tissue in sera of schizophrenic patients (1993)
    Springer
    European archives of psychiatry and clinical neuroscience 242 (1993), S. 314-317 
    Details
    ISSN: 1433-8491
    Keywords: Schizophrenia ; Pathogenesis ; Autoimmune disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The sera of 30 patients suffering from schizophrenia (DSM III) and 30 neurological controls were tested for antibrain antibodies in a blind indirect immunofluorescence assay. We found IgG- and IgM-binding in the sera of 22 patients, but only 4 out of the 30 age- and sex-matched controls. The binding was mainly directed to neurons from the frontal cortex and septal area, areas, which are regarded as important in the development of schizophrenic illness. These preliminary data are presented, to encourage other immunological studies in schizophrenia research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02190392
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  • 2
    Electronic Resource
    Electronic Resource
    An experimental randomized study of six different ventilatory modes in a piglet model with normal lungs (1991)
    Springer
    Intensive care medicine 17 (1991), S. 169-174 
    Details
    ISSN: 1432-1238
    Keywords: Intermittent positive-pressure ventilation ; High-frequency positive-pressure ventilation ; Airway pressures ; N2 wash-out ; Lung clearance index ; Extravascular lung water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A randomized study of 6 ventilatory modes was made in 7 piglets with normal lungs. Using a Servo HFV 970 (prototype system) and a Servo ventilator 900 C the ventilatory modes examined were as follows: SV-20V, i.e. volume-controlled intermittent positive-pressure ventilation (IPPV); SV-20VIosc, i.e. volume-controlled ventilation (IPPV) with superimposed inspiratory oscillations; and SV-20VEf, i.e. volume-controlled ventilation (IPPV) with expiratory flush of fresh gas; HFV-60 denotes low-compressive high-frequency positive-pressure ventilation (HFPPV) and HVF-20 denotes low-compressive volume-controlled intermittent positive-pressure ventilation; and SV-20P denotes pressure-controlled intermittent positive-pressure ventilation. With all modes of ventilation a PEEP of 7.5 cm H2O was used. In the abbreviations used, the number denotes the ventilatory frequency in breaths per minute (bpm). HFV indicates that all gas was delivered via the HFV 970 unit. The ventilatory modes described above were applied randomly for at least 30 min, aiming for a normoventilatory steady state. The HFV-60 and the HFV-20 modes gave lower peak airway pressures, 12–13 cm H2O compared to approximately 17 cm H2O for the other ventilatory modes. Also the mean airway pressures were lower with the HFV modes 8–9 cm H2O compared to 11–14 cm H2O for the other modes. The gas distibution was evaluated by N2 washout and a modified lung clearance index. All modes showed N2 wash-out according to a two-compartment model. The SV-20P mode had the fastest wash-out, but the HFV-60 and HFV-20 ventilatory modes also showed a faster N2 wash-out than the others. Regarding the lung clearance index, the SV-20P, HFV-60 and HFV-20 modes showed better indices than the other modes. No relationship was found between the ventilatory mode and extravascular lung water, and there were no differences in the hemodynamic variables.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01704722
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  • 3
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    Preliminary Report on the Paleodemography of the K2 and Mapungubwe Populations (South Africa) (1994)
    Baltimore : Periodicals Archive Online (PAO)
    Human Biology. 66:1 (1994:Feb.) 105 
    Details
    ISSN: 0018-7143
    Topics: Biology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5243-1994-066-01-000007
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  • 4
    Electronic Resource
    Electronic Resource
    T-lymphocyte subpopulations in schizophrenic patients (1990)
    Springer
    European archives of psychiatry and clinical neuroscience 239 (1990), S. 283-284 
    Details
    ISSN: 1433-8491
    Keywords: Schizophrenia ; T-lymphocytes ; Autoimmune disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary T-lymphocyte subpopulations were examined in the peripheral blood of 30 acute schizophrenic patients and compared with 30 age- and sex-matched patients with non-inflammatory neurological diseases. Significant increases in the numbers of Pan-T and T-helper cells were found in schizophrenic patients compared to the controls. The interindividual variability of values in the group of schizophrenic patients was greater than in the group of neurological patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01735051
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  • 5
    Electronic Resource
    Electronic Resource
    Remote auscultatory patient monitoring during magnetic resonance imaging (1992)
    Springer
    Journal of clinical monitoring and computing 8 (1992), S. 37-43 
    Details
    ISSN: 1573-2614
    Keywords: Monitoring: heart, respirations ; Measurement techniques: magnetic resonance imaging; infrared telemetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract A system for patient monitoring during magnetic resonance imaging (MRI) is described. The system is based on remote auscultation of heart sounds and respiratory sounds using specially developed pickup heads that are positioned on the precordium or at the nostrils and connected to microphones via polymer tubing. The microphones operate in a differential mode outside the strong magnetic field to reduce various sources of interference from the MRI equipment. After amplification, the signal is transmitted as infrared light to a small, battery-operated receiver and a headphone set. Thus, the patient can be simultaneously auscultated both inside and outside the shielded MRI room by infrared transmission through a metal mesh window. Bench tests of the system show that common mode acoustic noise is suppressed by approximately 30 dB in the frequency region of interest (100–1,000 Hz), and that polymer tubing having a diameter of approximately 2 mm can be used for efficient sound transmission. Recordings in situ show satisfactory detection of both heart sounds and respiratory sounds, although the signal is somewhat masked by noise during imaging. A clinical test incorporating 17 sedated or anesthetized patients was also performed. In all but four cases, the quality of the breath and heart sounds was regarded as acceptable or better.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01618086
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  • 6
    Electronic Resource
    Electronic Resource
    A new respiratory rate monitor: development and initial clinical experience (1993)
    Springer
    Journal of clinical monitoring and computing 10 (1993), S. 101-107 
    Details
    ISSN: 1573-2614
    Keywords: noninvasive sensor ; respiratory rate ; patient monitoring ; acoustic air flow sensor ; patient recovery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract The need for continous, noninvasive, and reliable respiratory rate monitoring during recovery from general anesthesia has long been recognized. Alternative principles can be grouped into those detecting the respiratory effort, and those detecting the actual result, i.e. the respiratory gas flow. The second category is of greatest interest for patient monitoring. In this paper, we report the development and initial clinical experience with a new acoustic air-flow sensor. By differential, multipoint detection of the air-flow in the mouth and nose region, the sensor can easily discriminate against different kinds of interference, including motion arterfacts. The sensor is nonexpensive, rugged, simple to apply, and inherently safe. An instrument with continous display of respiratory rate, and an audiovisual apnea alarm has been designed and built. The complete system has been tested on patients during recovery after general anesthesia. In 16 patients, the respiratory rate displayed by the instrument has been correlated against that visually observed. A good correlation was obtained. Minor discrepancies can be explained from the fact that visual observation corresponds to the respiratory effort, whereas the sensor detects the actual air flow. In 12 patients, 24 hour simultaneous recordings were made of respiratory rate with the new sensor, with simultaneous recording of the oxygen saturation and the heart rate with a pulse oximeter. It was found that the new sensor reliabley recorded respiratory depression and apnea. Such events may in some patients be as frequent as one incident per hour. One case of ‘Ondine's curse’ provided clear evidence that pulse oximetry has a low sensitivity to respiratory disorders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01142280
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  • 7
    Electronic Resource
    Electronic Resource
    Computer-aided interpretation of mass spectra by a combination of library search with principal component analysis (1990)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 4 (1990), S. 159-162 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The mass spectral set comprising the “hitlist” of a library search for spectra similar to that of an unknown is investigated by exploratory data analysis. Principal-component mapping is used to present the “hitlist” as a two-dimensional plot which allows an interactive classification of the unknown and the recognition of erroneous library spectra.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290040507
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  • 8
    Electronic Resource
    Electronic Resource
    Diffraction studies on the size dependence of the t→m transformation of zirconia (1994)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 349 (1994), S. 155-157 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Nano-crystalline zirconia particles, prepared by laser evaporation, were analyzed by electron microscopy and X-ray diffraction. The volume part of particles of the tetragonal modification comes up to 90%, although the sizes of the majority of the particles lie significantly above the equilibrium size of the transformation tetragonal → monoclinic. First interpretations are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00323248
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  • 9
    Electronic Resource
    Electronic Resource
    Field shifts in hafnium II (1991)
    Springer
    The European physical journal 18 (1991), S. 107-112 
    Details
    ISSN: 1434-6079
    Keywords: 21.10.Ft ; 31.20.Ej ; 31.30.Gs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract By means of classical interference spectroscopy, using enriched isotope samples, the isotope shift between178Hf and180Hf has been measured for 33 transitions in the Hf II spectrum. For the pure Russell-Saunders terms 5d 26s 4 F and2 F the parametric analysis yields a field-shift difference of 17(2) mK produced by the second-order interaction of the electrostatic operator and the field-shift operator. Semi-empirical calculations based on the non-relativistic Hartree-Fock method reproduce this value as well as the experimental field shifts if a factor of 1.68(6) is used to scale theab initio electron densities at the nucleus. The corresponding factor for the Hf atom is much smaller. This leads to a re-evaluation of screening ratios for Hf and to a more accurate value of the nuclear parameter λ178,180 (Hf)=0.072(4) fm2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01418175
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of rotation and ion incidence angle on sputter depth resolution in thin films of NiFe/Ta (1992)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 19 (1992), S. 55-59 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: In an NiFe/Ta system, interface widths (Δz) are compared for sputter profiles with stationary and rotating sample holder (Zalar rotation). For low sputter angles, the Zalar rotation brings considerable improvements in Δz. For higher sputter angles, the improvement available through Zalar rotation vanishes as self-shadowing due to crystallites with less favorable orientation becomes the dominating rate mechanism. The improvement is further reduced for thinner films much below 1000 Å. For low sputter energies and films 125 Å thick, Zalar rotation has no influence. The limit of depth resolution was 30 Å, which resulted from the substrate-induced roughness of the NiFe/Ta interface. The interface width's maximum near 30° for stationary sputter etching is characteristic of sputter-deposited fcc films.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740190113
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