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  • 1990-1994  (8)
  • 1991  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Inactivation of T5 phage by cis-vaccenic acid, an antivirus substance from Rhodopseudomonas capsulata, and by unsaturated fatty acids and related alcohols (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 77 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The antiviral extract from Rhodopseudomonas capsulata was purified and the predominant active component was defined as cis-vaccenic acid (C1- 8:1 Δ11) by gas-liquid chromatography and gas chromatography-mass spectrometry analyses. Antiviral activities of unsaturated fatty acids and related alcohols against T5 phage were also tested. Among them, linoelaidic acid, oleic acid, and petroselenyl alcohol inactivated 98%, 53%, 67% of T5 phage at the concentration of 50 μ g/ml, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb04314.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Immunomodulatory effects on rainbow trout, Oncorlynchus mykiss, injected with the extract of abalone, Haliotis discus hannai (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 7 (1991), S. 0 
    Details
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Rainbow trout, Oncorhynchus mykiss, injected with a water fraction extracted from abalone, Haliotis discus hannai, showed enhanced phagocytosis. This enhanced activity reached its maximum level 5 days after injection. The natural killer cell activities and the chemiluminescence responses of kidney leukocytes in fish treated with this fraction were also significantly increased, compared to those in albumin-treated fish. Rainbow trout injected intraperitoneally with this fraction showed an increased resistance to Vibrio anguillarum.〈section xml:id="abs1-2"〉〈title type="main"〉Zusammenfassung Immunomodulationseffekte bei Regenbogenforellen, Oncorhynchus mykiss, nach Injektion von Aba-lone-Entrakt, Haliotis discus hannaiBei Regenbogenforellen, Oncorynchus mykiss, denen ein wäßriger Extrakt der Abalone, Haliotis discus hannai, injiziert wurde, konnte eine gesteigerte Phagocytoseaktivität beobachtet werden. Diese Aktivi-tätssteigerung erreichte 5 Tage nach Verabreichung der Injektion ihr Maximum. Die natürliche Aktivi-tat von Killer-Zellen und die Chemoluminizenz-Reaktion der Nieren-Leukozyten in den mit dem Extrakt behandelten Fischen waren gegenüber Tieren, denen Albumin injiziert wurde, signifikant erhoht. Regenbogenforellen, denen der Abalone-Extrakt intraperitoneal injiziert wurde, zeigten eine erhohte Resistenz gegen Vibrio anguillarum.〈section xml:id="abs1-3"〉〈title type="main"〉Résumé Effects immunomodulatoires chez la truite arc-en-ciel, Onchorhynchus mykiss, traitie par des injections d'extraits d'onneaux, Haliotis discus hannai La truite arc-en-ciel, Onchorhynchus mykiss, traitie par injection d'une fraction aqueuse extraite d'ormeaux, Haliotis discus hannai, a montré une augmentation du taux de phagocytose. Cette augmentation de I'activité a atteint son niveau maximal cinq jours aprés injection. Les activitts naturelles des cellules tueuses et les résonses chimioluminescentes des leucocytes du rein des poissons traitis par cette fraction ont aussi significativement augmentis, par rapport ä celle des poissons traitis par de l'albumine. Les truites arc-en-ciel uaities par des injections intrapiritoniales de cette fraction ont montré une résistance accrue äVibrio anguillarum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0426.1991.tb00594.x
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  • 3
    Electronic Resource
    Electronic Resource
    Extremely low non-alloyed specific contact resistance ρc (10−8 Ω cm2) to metalorganic molecular beam epitaxy grown super heavily C-doped (1021 cm−3) p++GaAs (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 8227-8232 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The specific contact resistance ρc of non-alloyed ohmic metals (Mo/Au and WSix) to p-type GaAs is evaluated by transmission line method (TLM) patterns for various doping concentrations from 8×1018 to 1021 cm−3. The obtained specific contact resistance ρc, less than 10−8 Ω cm2, to metalorganic molecular beam epitaxy grown C-doped ( 1021 cm−3) GaAs is the lowest reported value. From the application point of view for the emitter electrodes of PNp type (two-dimensional electron gas base) heterojunction bipolar transistors, the specific contact resistance of a refractory metal, or the sputter-deposited WSix (x=0.45), is also studied. By reducing the growth temperature of molecular beam epitaxy from 600 to 450 °C and enhancing the As4/Ga flux ratio to 15, a nondiffusive heavily Be doped (1020 cm−3) GaAs is obtained. The specific contact resistance of the WSix to this sample is less than 10−6 Ω cm2. The obtained specific contact resistance can be well explained by a simple modeling based on the tunneling transport of light holes. Secondary ion mass spectroscopy analysis of the depth profile under heat acceleration shows a small diffusion of dopants for Be doped (1020 cm−3) GaAs and C-doped (1021 cm−3) GaAs. In addition, the specific contact resistance ρcISO of the isoheterojunction (p+GaAs/p+AlxGa1−xAs) is also evaluated by TLM patterns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347427
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  • 4
    Electronic Resource
    Electronic Resource
    Characterization of Ga2Se3 at ZnSe/GaAs heterovalent interfaces (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 2788-2790 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Despite the valence difference across the junction, it has been shown that ZnSe/GaAs epilayer/epilayer interface state densities can be reduced to values comparable to the (Al,Ga)As/GaAs interface. We have previously reported a transmission electron microscopy study indicating that ZnSe/GaAs structures exhibiting low interface state densities are associated with the formation of an interfacial layer of zinc-blende Ga2Se3. In this letter we describe a procedure whereby an interfacial layer can be deliberately introduced prior to nucleation of ZnSe. In situ x-ray photoelectron spectroscopy is used to study the nature of the bonding at the interfacial layer. A comparison of the Se 3d core level features from the ZnSe epilayer surface, a Se-reacted GaAs surface, and from a separately grown Ga2Se3 epilayer, clearly indicates the same Se bonding characteristic for the Se-reacted interfacial layer and the Ga2Se3 epilayer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104762
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Blue-green injection laser diodes in (Zn,Cd)Se/ZnSe quantum wells (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 3619-3621 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Laser diode action in the blue-green has been observed from (Zn,Cd)Se quantum wells within ZnSe/Zn(S,Se) p-n heterojunctions up to 250 K. Operation is reported for two different configurations for which the GaAs substrate serves either as the n- or p-type injecting contact. In pulsed operation, output powers exceeding 0.6 W have been measured in devices prepared on both n-type and p-type GaAs epitaxial buffer layers and substrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105625
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  • 6
    Electronic Resource
    Electronic Resource
    Application of plasma films prepared from manganese acetylacetonate for CO gas sensor device (1991)
    Springer
    Polymer bulletin 25 (1991), S. 273-278 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The plasma polymerization of manganese acetylacetonate (MnAcAc) was carried out and the deposited plasma films were applied for CO gas sensor devices. The plasma polymerization of MnAcAc brought about the deposition of organic thin-films containing manganese oxides. The plasma films showed p-type-semiconductive properties and the response to CO gas with increases in resistivity. The CO gas sensor devices constructed from a sandwich structure of the plasma film (2000–3000 angstroms) and Pt catalyst layer (10 angstroms) is applicable for practical uses. The sensitivity of the sensor device to CO gas (1000 ppm) was 24.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310803
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  • 7
    Electronic Resource
    Electronic Resource
    Action and immunoreactivity of neuropeptides in the buccal neuromuscular system of a prosobranch mollusc, Rapana thomasiana (1991)
    Springer
    Cell & tissue research 264 (1991), S. 57-62 
    Details
    ISSN: 1432-0878
    Keywords: FMRFamide ; Catch-relaxing peptide (CARP) ; Radula muscle ; Immunohistochemistry ; Rapana thomasiana (Mollusca)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In a prosobranch mollusc, Rapana thomasiana, the catch-relaxing peptide H-Ala-Met-Pro-Met-Leu-Arg-Leu-NH2 (CARP) was found to depress the contraction of the radula protractor and retractor elicited by electrical stimulations. The action of CARP was in contrast to that of other neuropeptides, H-Phe-Met-Arg-Phe-NH2 (FMRFamide) and H-Phe-Leu-Arg-Phe-NH2 (FLRFamide), which enhanced the contraction of the radula protractor and retractor, respectively. By immunohistochemical examinations, FMRFamide-like immunoreactive neurons were found on the rostral side of the right buccal ganglion and the caudal side of the left ganglion, where some CARP-like immunoreactive neurons were also distributed, indicating a possible coexistence of FMRFamide and CARP. FMRFamide- and CARP-like immunoreactivities were also detected in the neuropile of buccal ganglia, radula nerves arising from the ganglia, and nerve fibers in the radula muscles. The present results suggest that FMRFamide- and CARP-like peptides are involved in the regulation of the contraction of the radula muscles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305722
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  • 8
    Electronic Resource
    Electronic Resource
    Numerical comparison of momentum interpolation methods and pressure - velocity algorithms using non-staggered grids (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 7 (1991), S. 173-186 
    Details
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Finite-volume calculations of laminar separated flow around a fence are presented using a non-staggered grid system. Using the pressure-weighted interpolation method (PWIM), the role of the under-relaxation factor in this method has been studied. The performance of two pressure-velocity coupling algorithms, viz. SIMPLE and PISO, have been compared as well as the solution fields obtained using non-staggered and staggered grids. A detailed study has been conducted to investigate the occurrence of physically unrealistic convective velocities in the solution fields.The numerical results show that solutions obtained using non-staggered grids are as accurate as those obtained using staggered grids. The presence of very small under/overshoots in the estimated convective fluxes is related to the simultaneous presence of high Péclét numbers and rapidly varying pressure gradients. However, for the complex separated flow investigated, no induced errors were detected in the solution field.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1630070302
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