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  • 1
    Digitale Medien
    Digitale Medien
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 4674-4677 
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: A double-beam interferometer which incorporates quasioptical components developed in this laboratory has been used to measure near millimeter-wave dielectric properties of a variety of ceramic materials. We report here the results obtained on samples of various standard and advanced ceramics including alumina, silicon nitride, beryllia, and boron nitride. Results are compared with the data obtained by other researchers on similar samples.
    Materialart: Digitale Medien
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  • 2
    ISSN: 1471-0528
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Summary. Catecholamines were measured in maternal venous, and mixed umbilical cord blood. Maternal catecholamines were significantly (P〈0·01) reduced by epidural analgesia with a 36% reduction in nor-adrenaline and a 33% reduction in adrenaline. Fetal catecholamines were elevated at birth with a 3–8 fold increase in noradrenaline but not adrenaline during spontaneous vaginal delivery. The lowest fetal catecholamines were obtained in the group delivered under epidural analgesia; lower plasma catecholamines were not associated with adverse respiratory effects. Fetal platelets showed impaired a2-adrenoceptor function with absent aggregatory responses to adrenaline in vitro. The defect in platelet function was unlikely to be related to changes in the number of fetal platelet α-receptors or to changes in receptor affinity for adrenaline, as fetal platelets failed to aggregate to adrenaline from deliveries with high and low cord blood catecholamines.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 1483-1485 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We report here on an experiment in which picosecond electron pulses, produced by a compact radiation frequency (rf) electron gun, were used to excite a rectangular waveguide, generating 5 ps pulses of radiation with a bandwidth of ∼200 GHz. The interaction of the electron pulses with the waveguide can be modeled quite simply by performing a harmonic expansion of the pulse train produced by the electron gun and employing Poynting's theorem to compute the power coupled into the modes of the waveguide by each harmonic. The resulting model for the distribution of spectral power yields good agreement with the observed spectrum. © 1995 American Institute of Physics.
    Materialart: Digitale Medien
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  • 4
    ISSN: 1520-4995
    Quelle: ACS Legacy Archives
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    Industrial and engineering chemistry 6 (1967), S. 539-543 
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 1608-1609 
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: A pump/probe laser approach is utilized to investigate in a time-resolved manner the photochemistry of copper coordination complexes in the gas phase. These compounds are metal atom precursors for photochemical laser metal vapor deposition. Dissociation is effected by a KrF excimer laser and the copper atoms are detected via laser induced fluorescence. Evidence is provided that suggests that under excimer laser photolysis, the metal atom generation may proceed via unimolecular decomposition.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 13 (1984), S. 0 
    ISSN: 1600-0714
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Eosinophilic granuloma has traditionally been designated as the least severe component of the inter-related triad of diseases, Histiocylosis X (Lichtenstein 1953, 1964). In 1969, Lieberman and his group questioned the use of this time-honored term and proposed instead that eosinophilic grunuloma be regarded as a separate and distinct entity which could present either as a singular (unifocal) lesion or as a multifocal process. The term, “multifocal eosinophilic granuloma” was, thus, suggested as a replacement for the designation formerly known as Hand-Schuller-Christian Disease. The remaining component of Histiooytosis X termed Letterer-Siwe Disease was felt to be a totally separate disorder unrelated to eosinophilic granuloma and best classified as a relatively aggressive reticuloendothelial malignancy. In this presentation, we wish to report a case of multifocal eosinophilic granuloma which has run a very interesting course over a total of almost 10 years from the time of initial symptoms to the present. The more recent classification of Lieberman will be employed throughout this presentation. We will also propose the hypothesis that in this case, multifocal eosinophilic granuloma may represent a sequela of acquired immune deficiency perhaps initialed by T-cell viral infection. The possibility that, in a susceptible host, development of eosinophilic granuloma may be triggered by contact with environmental agents will also be discussed.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 22 (1995), S. 0 
    ISSN: 1440-1681
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: 1. The free radical scavenger MDL 73,404 decreases infarct size and improves heart performance after myocardial ischaemia and prolonged reperfusion. In the present study the possibility that changes in receptor density might contribute to the MDL 73,404-induced increase in contractility has been investigated in rats subjected to myocardial ischaemia and 8 days of reperfusion.2. Both in saline- and MDL 73,404-treated rats a significant decrease in β1- and increase in β2-adrenoceptor densities was apparent in the infarcted tissue.3. In non-infarcted septum and right ventricle tissue ischaemia followed by reperfusion tended to increase the density of β2-adrenoceptors which was significantly increased after MDL 73,404 treatment.4. The increased density of β2-receptors in the non-infarcted tissue may contribute to the MDL 73,404 induced improvement of cardiac performance.
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 14 (1987), S. 0 
    ISSN: 1440-1681
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: SUMMARY1. Autoradiographic techniques have been used to examine the location of β-adrenoceptors in the heart and β-adrenoceptors, substance P receptors and muscarinic cholinoceptors in blood vessels.2. Both β1-adrenoceptors and β2-adrenoceptors were present in guinea-pig and human heart, on the myocardium and associated with the cardiac nerves and blood vessels.3. Nerves on the vasculature and vascular smooth muscle contained β-adrenoceptors and muscarinic cholinoceptors.4. Receptors for substance P and β-adrenoceptors, but not muscarinic cholinoceptors were present on endothelial cells.
    Materialart: Digitale Medien
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  • 10
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 12 (1985), S. 0 
    ISSN: 1440-1681
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: 1. The effects of age on α-adrenoceptor responses, sensitivity and number were studied in rabbits aged from 1 to 36 months.2. Three types of investigation were carried out: conscious animal studies, isolated tissue studies and radioligand binding studies.3. Specific [3H]-prazosin binding decreased with age in both spleen and heart suggesting that the number of α1-receptors declined at least in the tissues studied. The specific binding of [3H]-clonidine to spleen membranes and [3H]-yohimbine to platelets was not affected by age.4. In vitro responsiveness to α-adrenoceptor agonists decreased with age in abdominal aorta and renal artery, while the affinity of adrenoceptors for prazosin (pA2) was not altered. The decrease may be non-specific as responses to potassium were also altered. No change in α2-adrenoceptor mediated platelet aggregation was observed.5. No change in pressor or depressor responses to full adrenoceptor agonists or to antagonists was observed in vivo. However, responses to clonidine, which is a partial agonist at α1-adrenoceptors, were decreased.6. While aging influenced α-adrenoceptor subtypes differently, there was no direct relation between functional changes and number of receptors.
    Materialart: Digitale Medien
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