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  • 1
    Electronic Resource
    Electronic Resource
    Electrical and optical properties of ZnS0.05Se0.95 nanocrystalline thin films (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 5652-5660 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: ZnS0.05Se0.95 nanocrystalline films were deposited onto fused silica and GaAs (100) substrates by the magnetron sputtering technique. The electrical conductivities of the films deposited onto fused silica substrates were measured in the temperature range of 180–300 K. It was observed that the low temperature conductivity could be explained by hopping of the charge carriers in the Coulomb gap while at elevated temperature Mott hopping is the predominant mode of conduction in these films. A distinct cross over from Efros–Shklovoskii to Mott hopping is observed for all the films. Optical spectra were found to be dominated by the combined effects of optical losses due to absorption and scattering. The absorption spectra indicated a blueshift, the extent of which depended on the crystallite size. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1370113
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  • 2
    Electronic Resource
    Electronic Resource
    Blood Groups of the Chinese in Calcutta (1967)
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 1245-1245 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table I. DISTRIBUTION OF ABO, AiA2BO, MN, Rh, DUFFY AND KELL BLOOD GROUPS AND SECRETOR FACTOR AMONG THE CHINESE IN CALCUTTA ABO system Phenotypes (number and per cent) A B AB Total Genes (per cent) q r 252 44-52 170 30-04 (44-44) (30-13) 113 19-96 (20-06) 31 566 5-48 100-00 (5-37) ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2131245a0
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis of $\mathsf{\gamma}$ -Fe $\mathsf{_2}$ O $\mathsf{_3}$ nanoparticles coated on silica spheres: Structural and magnetic properties (2003)
    Springer
    The European physical journal 34 (2003), S. 163-171 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The structural and magnetic properties of $\gamma$ -Fe2O3 nanoparticles dispersed on silica spheres prepared by sol-gel method were investigated. The properties of $\gamma$ -Fe2O3 nanoparticles without silica were compared with those on silica spheres. Both the nanoparticle assemblages were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), Mössbauer (20, 80 and 300 K) and electron paramagnetic resonance (EPR) (80, 300 K) measurements. The XRD spectra clearly indicated the formation of pure $\gamma$ -Fe2O3 nanoparticles and the absence of any other form of iron oxide. TEM images showed a uniform distribution of the nanoparticles of size $\sim$ 6 nm on the surfaces of silica spheres (diameter $\sim$ 35-60 nm). The size of the individual nanoparticles (without silica) varied within 5-6 nm. The low temperature (20 K) Mössbauer spectra consisted of a partially split sextet superimposed on a doublet. The partial magnetic splitting of the sextet at 20 K revealed the effect of surface magnetization and surface modifications of the $\gamma$ -Fe2O3 nanoparticles coated on silica spheres. The gradual collapse of the partially split sextet into a doublet with increasing temperature indicated the superparamagnetic relaxation exhibited by the $\gamma$ -Fe2O3 nanoparticles with/without silica. The surface magnetization arising out of mis-aligned spins at the surface as evidenced by Mössbauer spectra was further confirmed by electron paramagnetic resonance (EPR) studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00208-2
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on CdS nanoparticles dispersed in silica matrix prepared by sol-gel technique (2003)
    Springer
    The European physical journal 31 (2003), S. 3-9 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 78.20.-e Optical properties of bulk materials and thin films – 81.05.Dz II-VI semiconductors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: SiO2/CdS-nanoparticle composite films (SiO2:CdS=85:15, 80:20, 75:25 and 70:30) were prepared by the sol-gel route. The films were characterized by studying microstructural (XRD and TEM) and optical (transmittance and photoluminescence) properties. Band gaps of these films annealed at different temperatures (373-473 K) for different times (10-120 min) indicated that the signature of nanocrystallinity is retained throughout the range of our experimental conditions. A thermal diffusion process controlled growth in the crystallite size with increasing annealing time and temperature. The average radii of the nanoparticles varied as the cube root of the annealing time but showed exponential dependence on the inverse of annealing temperature. Photoluminescence (PL) studies of the composite films indicated excitonic transitions. Theoretical analysis of the line shapes of the PL peaks recorded at 300 K and 80 K could be accounted for by the combined effects of size distribution and phonon broadening. It was observed that the deformation potential (E d) effectively controlled the line shapes of the PL measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2003-00001-3
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  • 5
    Electronic Resource
    Electronic Resource
    Somatic chromosomes of the common palm civet,Paradoxurus hermaphroditus (Viverridae — carnivora) (1966)
    Springer
    Cellular and molecular life sciences 22 (1966), S. 740-741 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Paradoxurus hermaphroditus Männchen habenXY Geschlechtschromosomen, im Unterschied zu den ungewöhnlichenXO Männchen vonHerpestes auropunctatus. Beide Species gehören zu der Familie Viverridae der Ordnung Carnivora und demonstrieren die Robertsonsche Chromosomen-Evolution in Zahl und Struktur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01901353
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  • 6
    Electronic Resource
    Electronic Resource
    W chromosome in the Indian water snake (checkered keel back)Natrix piscator (colubridae) (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 79-80 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Die diploide Chromosomenzahl beider Geschlechter beträgt 40: 10 Macrochromosomen und 30 Microchromosomen. Die GeschlechtschromosomenZZ (♂) undZW (♀) sind cytologisch erkennbar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02136807
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  • 7
    Electronic Resource
    Electronic Resource
    Shortest Paths in Digraphs of Small Treewidth. Part I: Sequential Algorithms (2000)
    Springer
    Algorithmica 27 (2000), S. 212-226 
    Details
    ISSN: 1432-0541
    Keywords: Key words. Shortest path, Graph theory, Treewidth, Dynamic algorithm.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. We consider the problem of preprocessing an n -vertex digraph with real edge weights so that subsequent queries for the shortest path or distance between any two vertices can be efficiently answered. We give algorithms that depend on the treewidth of the input graph. When the treewidth is a constant, our algorithms can answer distance queries in O(α(n)) time after O(n) preprocessing. This improves upon previously known results for the same problem. We also give a dynamic algorithm which, after a change in an edge weight, updates the data structure in time O(n β ) , for any constant 0 〈 β 〈 1 . Furthermore, an algorithm of independent interest is given: computing a shortest path tree, or finding a negative cycle in linear time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004530010016
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  • 8
    Electronic Resource
    Electronic Resource
    Computing Mimicking Networks (2000)
    Springer
    Algorithmica 26 (2000), S. 31-49 
    Details
    ISSN: 1432-0541
    Keywords: Key words. Network flow, Maximum flow, Minimum cut, Multiterminal network, Realizable external flow, Mimicking network.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. A mimicking network for a k -terminal network, N , is one whose realizable external flows are the same as those of N . Let S(k) denote the minimum size of a mimicking network for a k -terminal network. In this paper we give new constructions of mimicking networks and prove the following results (the values in brackets are the previously best known results): S(4)=5 [2 16 ] , S(5)=6 [2 32 ] . For bounded treewidth networks we show S(k)= O(k) [2^ 2 k ] , and for outerplanar networks we show S(k) $\leq$ 10k-6 [k 2 2 k+2 ] .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004539910003
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  • 9
    Electronic Resource
    Electronic Resource
    Chromosomes and the karyotype of the Pangolin,Manis pentadactyla L. (Pholidota-Mammalia) (1969)
    Springer
    Cellular and molecular life sciences 25 (1969), S. 1167-1168 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung In Knochenmarkzellen wurden die Chromosomen eines männlichen Pangolins (Manis pentadactyla L.) untersucht. Die Zahl der diploiden Chromosomen beträgt 36. Dieser zytologische Befund unterstützt die Ansicht, dass man die Pangoline in eine besondere Ordnung der Pholidota einreiht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01900253
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  • 10
    Electronic Resource
    Electronic Resource
    A comparative study of the chromosomes of birds (1969)
    Springer
    Chromosoma 26 (1969), S. 148-168 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Karyotype analysis and morphometric measurement of the chromosomes of eleven species of Indian birds are described. The unequivocal identification of W chromosome in the females of five species of the present investigation further strengthens the generalisation that, at least in Carinatae, the sex chromosome constitutions are of ZZ and ZW types in males and females respectively. — The chromosomes of different species of birds so far worked out in each order have been compared using quantitative methods and tentative conclusions have been drawn regarding chromosomal affinities between species of different taxonomic categories.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00326452
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