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  • 1985-1989  (7)
  • 1980-1984  (3)
  • 1987  (7)
  • 1984  (3)
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Materialart
Erscheinungszeitraum
  • 1985-1989  (7)
  • 1980-1984  (3)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Three-dimensional computer simulation of ion beam scattering by an electrostatic reflector (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1901-1904 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A three-dimensional computer model was used to study the scattering of a reflected lithium ion beam by an electrostatic reflector. Results show that for ion gun systems for active space plasma experiment applications, beam scattering of less than 1° can be attained with electrostatic reflectors.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1139663
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  • 2
    Digitale Medien
    Digitale Medien
    Characterization of N-CBz-glycyl-glycyl-arginyl peptidase and glycyl-prolyl peptidase of Bacteroides gingivalis (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 22 (1987), S. 0 
    Details
    ISSN: 1600-0765
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Bacteroides gingivalis produces large amounts of proteolytic enzymes which may play a role in its virulence. These enzymes may participate in the tissue destruction of the inflammatory process. In this study, the characteristics of two such enzymes, N-CBz-glycyl-glycyl-arginyl peptidase (N-CBz-Gly-Gly-Arg peptidase) and glycyl-prolyl peptidase (Gly-Pro peptidase) were investigated. The enzymes eluted in different peaks from an anion exchange column. N-CBz-Gly-Gly-Arg peptidase was associated with cells up to 48 h in culture. If cultured longer, it also released in the supernatant. It exhibited optimal activity between pH of 7.0 and 7.5 and was readily inactivated by heat treatment (45°C for 15 min). The enzyme activity was inhibited by p-chloromercuribenzoic acid (PCMB), leupeptin and antipain, suggesting that it is a thiol protease. The B. gingivalis N-CBz-Gly-Gly-Arg peptidase was different from the serum enzyme that digests the same substrate. The serum enzyme was more resistant to heat treatment and was inhibited by diisopro-pylfluorophosphate (DFP). B. gingivalis also produced Gly-Pro peptidase that is released in the supernatant. The enzyme has an optimal pH range between 7.5 and 8.0. The B. gingivalis Gly-Pro peptidase was inhibited by DFP, suggesting that it represents a serine protease. The serum Gly-Pro peptidase did not differ from the bacterial enzyme with respect to its sensitivity to inhibitors; however, they were markedly different in heat sensitivity. The bacterial enzyme was completely inactivated at 60°C for 30 min, whereas the serum enzyme was not inactivated even at 1 h at 60°C.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0765.1987.tb01608.x
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  • 3
    Digitale Medien
    Digitale Medien
    Cyclosporin A enhances Streptozocin-induced diabetes in CD-1 mice (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 324-327 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Cyclosporin A ; cellular immunity ; Streptozocin ; insulitis ; diabetes mellitus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Cyclosporin A (CYA), when administered to CD-1 mice treated with a subdiabetogenic dose of Streptozocin (STZ), exacerbated the STZ-induced insulitis and elevated the plasma glucose levels, parallel to a reduction of the insulin content of the pancreas. The possible mechanisms of CYA-mediated aggravation of STZ-induced diabetes are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01945570
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  • 4
    Digitale Medien
    Digitale Medien
    Transient cells of the developing mammalian telencephalon are peptide-immunoreactive neurons (1987)
    [s.l.] : Nature Publishing Group
    Nature 325 (1987), S. 617-620 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] We identified the subplate and marginal zone cells unam-bigously by their birthdate. These cells undergo their final round of cell division and migrate away from the ventricular zone between embryonic day 24 (E24) and E30 (gestation is 65 days in the cat)1. In contrast, cells of the cortical layers ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/325617a0
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  • 5
    Digitale Medien
    Digitale Medien
    The Purkinje fiber-myocardial cell region in the goat heart as studied by combined scanning electron microscopy and chemical digestion (1984)
    Springer
    Cellular and molecular life sciences 40 (1984), S. 849-850 
    Details
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The 3-dimensional architecture of the junctional region between Purkinje fibers and ordinary myocardial cells has been closely studied by combined scanning electron microscopy and chemical digestion in the goat heart. It was revealed that the Purkinje fibers forming the terminal arborization of the atrioventricular bundle are followed by transitional cells which are in contact with ordinary myocardial cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01951989
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  • 6
    Digitale Medien
    Digitale Medien
    Encephalomyocarditis (EMC) virus-induced diabetes mellitus prevented byCorynebacterium parvum in mice (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 430-431 
    Details
    ISSN: 1420-9071
    Schlagwort(e): EMC virus ; Corynebacterium parvum ; diabetes mellitus ; immunity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Corynebacterium parvum prevented the development of encephalomyocarditis virus-induced diabetes in mice, when it was given 3–14 days before the virus infection. This treatment inhibited virus replication in the pancreas of the infected mice at an early stage of the infection.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01940440
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  • 7
    Digitale Medien
    Digitale Medien
    Clinical pathology of malignant meningiomas (1984)
    Springer
    Acta neurochirurgica 73 (1984), S. 179-191 
    Details
    ISSN: 0942-0940
    Schlagwort(e): Meningioma ; malignant tumour ; papillary meningioma ; anaplastic meningioma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Nineteen cases of malignant meningiomas-seven haemangiopericytic, two papillary and ten of the anaplastic type-were examined clinicopathologically. These were ten male and nine female patients and eleven of these received reoperation for recurrence. Tumours of the hemangiopericytic type had similar angiographic and macrooscopic features and malignant characteristics were found microscopically in some tumours. There were intratumoral cysts in both cases of the papillary type and these tumours had a high cellularity, an increased number of mitosis, haemorrhage and partially haemangiopericytic patterns. Six cases of the anaplastic type had changed from a benign type at recurrence and those tumours had variable features radiographically and macroscopically. Lack of typical arrangement, a large number of mitoses, increased cellularity, focal necrosis, brain infiltration, pleomorphism and anaplasia were found histologically. Four cases of the anaplastic type were diagnosed at the first operation and these tumours had apparently similar angiographic and macroscopic features, but with variable organoid structures and malignant forms, microscopically. Electron microscopic features are also described. In malignant meningiomas, the recurrence rate was high even in cases of total removal. The outcome for these patients was good in the papillary type, relatively good in the haemangiopericytic type and poor in the anaplastic type. From these results therapeutic indications are also suggested.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01400851
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  • 8
    Digitale Medien
    Digitale Medien
    Effects of amino acids on cat red nucleus neurons in vitro (1984)
    Springer
    Experimental brain research 54 (1984), S. 150-156 
    Details
    ISSN: 1432-1106
    Schlagwort(e): EPSP ; IPSP ; Amino acids ; Red nucleus ; Brain slice
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Intracellular records were obtained from neurons in the region of the red nucleus (RN) of cat brain slices. Both EPSPs and IPSPs were recorded in response to local electrical stimulation and these resembled similar electrophysiological responses observed in experiments conducted in vivo. Monosynaptic and polysynaptic IPSPs were observed, suggesting the existence of inhibitory interneurons near or within the RN region. When added to the bathing solution, L-glutamate and L-aspartate depolarized RN neurons with a decrease in input resistance. γ-Aminobutyric acid (GABA) and glycine hyperpolarized the cells with a decrease in input resistance. GABA also elicited a depolarizing response. These amino acid actions had direct postsynaptic effects, since the experiments were conducted in a low Ca2+/high Mg2+ medium which blocked synaptic transmission.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00235826
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  • 9
    Digitale Medien
    Digitale Medien
    Differentiation of obligate anaerobes by assay of pyruvate:Ferredoxin oxidoreductase activity (1987)
    Springer
    European journal of clinical microbiology & infectious diseases 6 (1987), S. 74-75 
    Details
    ISSN: 1435-4373
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract In the described assay system a blue colour develops within 30 min after inoculation of obligate anaerobes, even under aerobic conditions. The simple and rapid assay may be of use in differentiating obligate anaerobes of clinical importance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02097201
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  • 10
    Digitale Medien
    Digitale Medien
    Online pH,pCO2 andpO2 monitoring system using two-way cyclic pumping of lactate Ringer as a baseline solution (1987)
    Springer
    Medical & biological engineering & computing 25 (1987), S. 45-50 
    Details
    ISSN: 1741-0444
    Schlagwort(e): Blood gas ; ISFET ; Lactate Ringer ; Patient monitoring ; pCO2 ; pH ; pO2
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Abstract A system for the online, simultaneous and intermittent analysis of blood pH, pCO2 pO2 using two-way cyclic pumping of lactate Ringer as a baseline solution is described. The multi-gas sensor is composed of a pH-ISFET with a temperature sensor, a pH-ISFET-based pCO2 sensor and a Clark-type pO2 sensor, bundled in an epoxy rod, and held in place in a flow cell which is directly connectable to an indwelling cannula. The system is controlled by a microcomputer, which supervises pump operation, temperature-compensation of sensor outputs, one-point calibration using sampled blood analysis, and provides graphical display of monitored results. Results of arterial blood-gas monitoring for mongrel dogs are presented which demonstrate the reliability of the present system over extended periods.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02442819
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