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  • 1
    Electronic Resource
    Electronic Resource
    Infrared intersubband absorption in GaAs/AlAs multiple quantum wells (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2145-2147 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Optical absorption spectra have been measured from 6 to 296 K for a GaAs/AlAs multiple quantum well sample which shows a strong peak at 11.1 μm at room temperature. These and previously published results are compared with predictions of an effective mass model which takes into account conduction-band nonparabolicity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101153
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  • 2
    Electronic Resource
    Electronic Resource
    Structures of (Z)- and (E)-1,2-diphenyl-2-(4-tolylvinyl) bromide (1987)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 73-76 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010827018709694X
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  • 3
    Electronic Resource
    Electronic Resource
    Structure of (Z)-1,2-diphenyl-2-p-tolylvinyl 2,2,2-trifluoroethyl ether (1986)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 42 (1986), S. 1220-1222 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010827018609282X
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  • 4
    Electronic Resource
    Electronic Resource
    Uptake and Retention of14C-Aroclor® 1254 in the Amphipod,Gammarus tigrinus, Fed Contaminated Fungus,Fusarium oxysporum (1985)
    Springer
    Archives of environmental contamination and toxicology 14 (1985), S. 59-64 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Food chain transfer of polychlorinated biphenyls (PCBs) was studied by feeding contaminated fungus,Fusarium oxysporum, to the amphipod,Gammarus tigrinus, both isolated from the Hudson River. Apparent distribution coefficients (μg PCB/g dry wt. fungus // μg PCB/g medium) of 1.14–1.33 × 103 were determined when14C-Aroclor 1254 at 0.007 μg/g was added to 4-day old fungal growth for 24 hr. InG. tigrinus fed contaminated fungus, cross-gut PCB assimilation was indicated. Rapid PCB uptake occurred with a constant level achieved between 9 and 24 hr. Over a period of 144 hr, 57% of accumulated PCBs were eliminated. The results suggest that dietary uptake may contribute substantially to PCB levels inGammarus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01055762
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  • 5
    Electronic Resource
    Electronic Resource
    Structure of cis-1,2-diphenyl-2-tolylvinyl acetate (1987)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 43 (1987), S. 740-743 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270187094290
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  • 6
    Electronic Resource
    Electronic Resource
    Measurement of basilar artery diameter in dogs: CT evaluation correlated with arteriography (1988)
    Springer
    Neuroradiology 30 (1988), S. 239-244 
    Details
    ISSN: 1432-1920
    Keywords: Arteriography ; Basilar artery diameter ; Computed tomography ; Vasospasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In this study we have used a computed tomographic (CT) method using profile analysis to measure the diameter of the basilar artery. In a search for a noninvasive and repeatable method to substitute for the traditional arteriography in the evaluation of the degree of cerebral vasospasm, we employed both CT and arteriography to measure the diameter of the basilar artery in eight adult mongrel dogs weighing between 7 and 12 kg. In three of these animals, assessments were made before and after subarachnoid hemorrhage (SAH) induced by injecting autologous arterial blood into the cistern magna. It was found that the basilar artery diameter as evaluated by CT was 47% larger than that measured by arteriography. However, there was a very good correlation (n=63, r=0.75, p〈0.001) between the two methods. This paper presents a new model for the measurement of the basilar artery diameter, one which may also provide a safer method for the evaluation of vasospasm in humans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341835
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  • 7
    Electronic Resource
    Electronic Resource
    Formation of willemite from powder mixture with TiO2 addition (1989)
    Springer
    Journal of materials science 24 (1989), S. 3300-3304 
    Details
    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 The formation of willemite, Zn2SiO4, from stoichiometric oxide powder mixtures either with 3.2 mol % TiO2 additive (ZST) or without TiO2 addition (ZS) and from flux-added glaze powder (G) were studied in the temperature range of 650 to 1515° C. Activation energy of willemite formation were 167, 226 and 188 kJ mol−1 for G, ZS and ZST specimens respectively. TiO2 addition not only reduced the activation energy of willemite formation, but was also found to stabilize the metastable phase,β-Zn2SiO4, to room temperature after cooling from melts. Annealing of the melted ZnO-SiO2-TiO2 composition resulted in the transformation of β-Zn2SiO4 to α-Zn2SiO4. It is suggested that the substitution of a Si+4-site by a Ti+4 ion contributes to the stabilization of the β-phase, the larger d-spacing, and smaller c/a ratio of willemite transformed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01139057
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  • 8
    Electronic Resource
    Electronic Resource
    High temperature oxidation of Ni2AlTi (1989)
    Springer
    Journal of materials science 24 (1989), S. 3707-3711 
    Details
    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 The isothermal oxidation process in bulk and powdered Ni2AlTi (L21 structure) has been studied in the temperature range of 600 to 1200° C in air by means of X-ray diffraction and scanning electron microscopy. At 900 and 1200° C, the transient oxides, NiO and TiO2 were formed in the initial stage on the outer surface. Subsequent oxidation was dominated by outward diffusion of aluminium, resulting in the formation of a Ni3Ti layer beneath an internal precipitation layer containing Al2O3-NiAl2O4 aggregates, NiTiO3 and Ni3Ti. Formation of NiTiO3 and NiAl2O4 at the expense of NiO, TiO2 and Al2O3 indicated the reaction among constituent oxides also occurred in the late stage of oxidation at 900 and 1200° C. Only NiO and TiO2 were identified in specimens oxidized at 600° C up to 24h. The oxidation rate of Ni2AlTi is of the same order of magnitude as the dilute γ-NiAl alloy at 1200° C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02385760
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  • 9
    Electronic Resource
    Electronic Resource
    Lemdana latifi n. sp. (Filarioidea: Onchocercidae) from the red jungle fowl (Gallus gallus spadiceus) (1989)
    Springer
    Systematic parasitology 13 (1989), S. 231-237 
    Details
    ISSN: 1573-5192
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Lemdana latifi n. sp. was found in connective tissues around the trachea and crop and in the body-cavity of seven of 14 Malayan red jungle fowl Gallus gallus spadiceus. The new species is described and illustrated. Morphologically it is most closely related to Lemdana pavonica and Lemdana francolini. Lemdana latifi is distinguished from the eight valid species of Lemdana by the mean spicular ratio of 1.7:1; the right spicule with a right margin 18–29% (15–31 μm; mean 24 μm) longer than the left margin; the distal half of the left spicule twisted and S-shaped; and the absence of unpaired papillae at tip of male tail. The new species has smaller adults, a shorter left spicule and a shorter glandular oesophagus than those of L. pavonica and a wider male, shorter spicules and a longer muscular oesophagus than those of L. francolini. The male of L. latifi is 7–9 (8.1)mm long, the left spicule 164–215 (184)μm long and the right spicule 98–117 (108)μm long. The female is 17–23 (21)mm in length. Sheathed microfilariae from blood smears are 78–100 μm long and those from the uterus are 89–103 μm long. This is the sixth valid species of Lemdana in the Phasianidae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009748
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  • 10
    Electronic Resource
    Electronic Resource
    Generating binary trees of bounded height (1986)
    Springer
    Acta informatica 23 (1986), S. 529-544 
    Details
    ISSN: 1432-0525
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Summary We present a new encoding scheme for binary trees with n internal nodes whose heights are bounded by a given value h, h≧⌈log2(n +1)1⌉. The scheme encodes the internal nodes of the tree level by level and enables us to develop an algorithm for generating all binary trees within this class in a certain predetermined order. Specifically, the trees are generated in decreasing height and for trees of the same height they are generated in lexicographically increasing order. The algorithm can be easily generalized to encompass t-ary trees with bounded height. It is then shown that the average generation time per tree is constant (independent of n and h).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00288468
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