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  • 1
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. A rickettsia-like organism was observed in diseased Nile tilapia, Oreochronuis niloticus (L.), from southern Taiwan. Most affected fish were pale and lethargic with haemorrhages and ulcers on the skin. The most significant gross pathological changes were varying degrees of ascites, and enlargement of the spleen, kidney and liver. Marked white nodules (as ring-shaped foci), varying in size, were found in these organs. A Gram-negative, rickettsia-like organism (RLO) frequently appeared as inclusions or within host cell intra-cytoplasmic vacuoles. Fibrin thrombi, perivascular necrosis, chronic inflammatory cells with hypertrophy and RLO-laden cells were characteristic of the disease. White nodules induced in experimental fish were similar to naturally infected cases and RLOs were reisolated in tissue culture using a CHSE-214 cell line. This provides evidence that the systemic granulomas in Nile tilapia were caused by RLOs.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 4160-4163 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The generation of Frenkel defects (a self-interstitial and a vacancy) in heavily As doped Si is investigated theoretically based on first-principles total energy calculations. We find that it is much easier to generate a self-interstitial and a vacancy close to substitutional As atoms than in pure Si, due to the lower energy cost. The As atom binds strongly with the vacancy, but does not bind with Si self-interstitial and other As atoms. We have considered several different reactions such as Si5→Si4V+I, AsSi4→AsSi3V+I, As2Si3→As2Si2V+I, As3Si2→As3SiV+I, and As4Si→As4V+I. The theoretical results are in good agreement with experimental observations. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 421-423 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A pulsed laser deposition system with a rotating reflector, which can generate an extended plume with a diameter of about 40 mm, has been proven to be viable in producing large area YBa2Cu3O7 (YBCO) thin films. Films with uniformity of thickness and electrical properties to within a few percents were obtained. By making a further modification on this laser scanning system, YBCO films with various thicknesses can be deposited in situ on several pieces of substrates under essentially identical deposition conditions, and particularly, in a continuous fashion. The atomic force microscopy (AFM) images reveal that films grown on NdGaO3 follow the Stranski–Krastanov (layer then island growth) mode, while films grown on as-polished MgO and on annealed MgO follow the Volmer–Weber (islands without layer growth) mode and step-flow mode, respectively. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 885-887 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A multistep postannealing scheme has been developed for preparing nearly single phased, c-axis oriented TlBa2Ca2Cu3Ox (Tl-1223) superconducting thin films fabricated by the direct-current-sputtering process. Films obtained by the present process have shown, for the first time in this system, a critical current density (Jc) above 106 A/cm2 at 77 K with a zero-resistance transition temperature Tc0≈110 K. The order of magnitude enhancement in Jc is attributed to the improvement of film morphology which, in turn, removed most of the weak links encountered previously. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Electroanalytical Chemistry 273 (1989), S. 231-242 
    ISSN: 0022-0728
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Computing 57 (1996), S. 255-271 
    ISSN: 1436-5057
    Keywords: 90B35 ; 68M20 ; k-partitioning containing kernels ; NP-complete ; worst case analysis ; LPT-algorithm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Seik≥2 eine natürliche Zahl undG= $$\{ g_1 ,g_2 , \cdots ,g_m \} \cup \{ t_1 ,t_2 , \cdots ,t_n \} $$ eine Menge von höchstenskm nichtnegativen ganzen Zahlen. Gesucht ist eine Partition vonG= $$\{ g_1 ,g_2 , \cdots ,g_m \} \cup \{ t_1 ,t_2 , \cdots ,t_n \} $$ inm Teilmengen, die jeweils nicht mehr alsk Elemente enthalten, sodaß alleg i (Kerne genannt) unterschiedlichen Teilmengen zugeordnet werden und die maximale Summe von Zahlen in einer dieser Teilmengen möglichst klein wird. Wir zeigen zunächst, daß für jedesk≥3 dieses Problem NP-vollständig im starken Sinne ist. Als Heuristik für dieses Problem benutzen wir eine revidierte Version des bekannten LPT-Algorithmus für das Multiprozessorscheduling-Problem. Fürk=3 zeigen wir eine Worst-Case Schranke von 3/2–1/2m.
    Notes: Abstract LetG= $$\{ g_1 ,g_2 , \cdots ,g_m \} \cup \{ t_1 ,t_2 , \cdots ,t_n \} $$ be a list of items with nonnegative weights assigned andk≥2 be an integer. The objective is to find an assignment of the items to the bins such that allg i (called kernels) are assigned to different bins, such that no bin contains more thank items, and such that the maximum weight assigned to any bin becomes minimum. In this paper, we first prove that the problem is NP-complete in the strong sense for anyk≥3. As heuristic for this problem, we use a modified version of the famous LPT-algorithm for multiprocessor scheduling, and we show a worst case bound of 3/2–1/2m fork=3.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 57 (1996), S. 421 -425 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The electrochemical preparation of highly dispersed Au microparticles on the surfaces of glassy carbon (GC) electrodes and their electrocatalytic activities for the oxidation of formaldehyde were studied. It was found that the reduction of Au3+ to Au is controlled by diffusion and the formation mechanism of Au microparticles on the GC surfaces corresponds to an instantaneous nucleation and diffusion-controlled three dimensional growth process. The particle size is about 80–90 nm in diameter after the electrochemical ageing treatment. These highly dispersed Au microparticles have high surface areas and exhibit better electrocatalytic activity than that of bulk-form Au toward the electrochemical oxidation of formaldehyde in alkaline media.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 126 (1988), S. 279-286 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Radiobrominations of cetyl bromide with82Br in several organic media such as DMF, 18-crown-6, DMSO, pyridine and n-butanol were achieved and a comparison was made as to the labelling rates. The rate order was found as follows: DMF〉18-crown-6〉DMSO〉pyridine } n-butanol which was attributed to increased anion /i.e., the nucleophilic bromide ion,82Br−/ solvation. Labelling in pyridine or alcohol was found to be too slow to meet practical needs. A suitable crown ether such as 18-crown-6 was found to be favourable for rapid radiobromination. However, it was discovered unexpectedly that dimethylformamide /DMF/ was superior to 18-crown-6. We therefore recommend DMF as an alternative reaction medium for fast radiobromination considering that this solvent is inexpensive and readily available.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 33 (1998), S. 4477-4483 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Differential scanning calorimetry (DSC) was used to study the precipitation kinetics of metastable phases in an Al6061 alloy and a 20 vol % alumina particle reinforced Al6061 composite. The thermal effects in the DSC traces were analysed quantitatively. The kinetic parameters for the phase transformations in the Al6061 alloy and composite were calculated using the varying heating rate method and the Kissinger approach. It was found that the overall age-hardening sequence of the Al6061 alloy did not change due to the addition of Al2O3 particles, but the volume fractions of the various phases and the precipitation kinetics of some of the phases were modified. The precipitation transformations of the metastable phases in both the Al6061 and the composite obey an n-order kinetic model. © 1998 Kluwer Academic Publishers
    Type of Medium: Electronic Resource
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