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  • 1
    Electronic Resource
    Electronic Resource
    New and general route to the synthesis of oxopolymetalates via peroxometalates in aqueous medium: synthesis and crystal and molecular structure of bis[bis(triphenylphosphine)nitrogen(1+)] nonadecaoxohexatungstate(2-) (1989)
    s.l. : American Chemical Society
    Inorganic chemistry 28 (1989), S. 4297-4300 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00322a024
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  • 2
    Electronic Resource
    Electronic Resource
    Molecular beam epitaxial growth and characterization of InSb on Si (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 1016-1018 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Epitaxial layers of InSb have been grown on Si substrates by molecular beam epitaxy. Room-temperature electron mobilities are 48 000 and 39 000 cm2/V s for 3.2 μm-thick InSb with and without a thin GaAs buffer, respectively. The corresponding carrier concentrations are 2.2×1016 and 2.7×1016 cm−3. A sample with an InSb thickness of 8 μm exhibited room-temperature mobilities as high as 55 000 cm2/V s with carrier concentrations of about 2.0×1016 cm−3. A sharp band-edge transmission spectrum is observed at room temperature for the 8 μm layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100784
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  • 3
    Electronic Resource
    Electronic Resource
    Recombination velocity at molecular-beam-epitaxial GaAs regrown interfaces (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2571-2573 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have estimated the recombination velocity and minority-carrier diffusion length at and near molecular-beam-epitaxial GaAs regrowth interfaces. The diffusion length in the regrown layers is ∼1–3 μm and is lowered to 0.3 μm at the interface. The interface recombination velocity is ∼105 cm/s. These parameters are better for a sample which was ion milled and lamp annealed before regrowth, compared to a sample which was wet-chemical etched and annealed in the growth chamber under arsenic flux before regrowth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342786
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  • 4
    Electronic Resource
    Electronic Resource
    Optical waveguide preform fabrication: Silica formation and growth in a high-temperature aerosol reactor (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2445-2450 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Silica particle formation and growth in a high-temperature aerosol reactor has been studied. A novel sampling probe has been used to obtain the evolution of the silica particle size distribution in the reactor. A simple model approximating the particle size distribution by a unimodal lognormal function was used to describe the aerosol behavior in the reactor. Good agreement of the integral properties of the aerosol size distribution was obtained between theory and experiment. Reasonable agreement was also obtained with the prediction of more sophisticated models for aerosol dynamics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342814
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  • 5
    Electronic Resource
    Electronic Resource
    Structure of a planar organic compound: 2,1,3-benzoselenadiazole (piaselenole) (1989)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 45 (1989), S. 73-75 
    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/S0108270188008376
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  • 6
    Electronic Resource
    Electronic Resource
    Decreased expression of the insulin-responsive glucose transporter in diabetes and fasting (1989)
    [s.l.] : Nature Publishing Group
    Nature 340 (1989), S. 70-72 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Previous measurements of total glucose transporters in adipocytes from streptozotocin-induced diabetic and fasted rats have shown that the microsomal pool of intracellular glucose transporters is reduced concomitantly with the development of insulin resistance1"3. Insulin-dependent movement of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/340070a0
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  • 7
    Electronic Resource
    Electronic Resource
    Modification of jute fibre through vinyl grafting aimed at improved rot resistance and dyeability (1989)
    Springer
    Journal of materials science 24 (1989), S. 205-212 
    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 Raw, dewaxed and oxidized jute fibres and those chemically modified with phenol and formaldehyde (treatment done for 3 h at 95° C and pH 8) before or subsequent to oxidation, were subjected to graft copolymerization with methyl methacrylate (MMA) in the presence or absence of some other monomers such as maleic anhydride (MA) or methacrylic acid (MAA) in limited aqueous system using K2S2O8 as the initiator under photoconditions with the objective of inducing improved rot resistance and dyeability without loss in tensile strength of the fibre. For preparing oxy-jute, dewaxed and preswollen (dewaxed jute fibre swollen with 10% aqueous urea at 90° C for 2h) jute fibre were separately subjected to mild oxidation or bleaching using aqueous H2O2 and NalO4 and non-aqueous chlorine (Cl2 in CCl4) under specified conditions. Optimum conditions for graft copolymerization have been established by examination of the effect of such variables as monomer concentration, time of polymerization and nature of chemical modification of jute fibre prior to vinyl grafting. Percentage grafting, tenacity (g denier−1), dye fixation (%) and rot resistance (expressed as percentage retention of tensile strength of the fibre after a standard soil burial test) were evaluated and analysed. High rot resistance (80–90% retention of tensile strength after soil burial test) and dye fixation (%) of as high as 86% were readily obtained for grafted jute fibres. Washing fastness and light fastness properties of the dyed fibres (grafted and ungrafted) were also examined and compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00660955
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  • 8
    Electronic Resource
    Electronic Resource
    Gibberellic-acid-stimulated Ca2+ accumulation in endoplasmic reticulum of barley aleurone: Ca2+ transport and steady-state levels (1989)
    Springer
    Planta 178 (1989), S. 411-420 
    Details
    ISSN: 1432-2048
    Keywords: Aleurone ; Calcium transport ; Endoplasmic reticulum (Ca2+ levels) ; Gibberellin and Ca2+ transport ; Golgi apparatus ; Hordeum (Ca2+ transport) ; Microsome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The steady-state levels of Ca2+ within the endoplasmic reticulum (ER) and the transport of 45Ca2+ into isolated ER of barley (Hordeum vulgare L. cv. Himalaya) aleurone layers were studied. The Ca2+-sensitive dye indo-1. Endoplasmic reticulum was isolated and purified from indo-1-loaded protoplasts, and the Ca2+ level in the ER was measured using the Ca2+-sensitive dye indo-1. Endoplasmic reticulum was isolated and purified from indo-1-loaded protoplasts, and the Ca2+ level in the lumen of the ER was determined by the fluorescence-ratio method to be at least 3 μM. Transport of 45Ca2+ into the ER was studied in microsomal fractions isolated from aleurone layers incubated in the presence and absence of gibberellic acid (GA3) and Ca2+. Isopycinic sucrose density gradient centrifugation of microsomal fractions isolated from aleurone layers or protoplasts separates ER from tonoplast and plasma membranes but not from the Golgi apparatus. Transport of 45Ca2+ occurs primarily in the microsomal fraction enriched in ER and Golgi. Using monensin and heat-shock treatments to discriminate between uptake into the ER and Golgi, we established that 45Ca2+ transport was into the ER. The sensitivity of 45Ca2+ transport to inhibitors and the Km of 45Ca2+ uptake for ATP and Ca2+ transport in the microsomal fraction of barley aleurone cells. The rate of 45Ca2+ transport is stimulated several-fold by treatment with GA3. This effect of GA3 is mediated principally by an effect on the activity of the Ca2+ transporter rather than on the amount of ER.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391870
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  • 9
    Electronic Resource
    Electronic Resource
    Turn-on delay of a Josephson junction (1989)
    Springer
    Journal of low temperature physics 74 (1989), S. 407-415 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An attempt has been made to give a new definition of turn-on delay of a Josephson junction which differs from earlier works. On the basis of our definition, an analytical expression of turn-on delay has been developed. This analytical model is based on a concept inherently different from those of Harris and McDonaldet al. It is observed that based on our model, the analytical expression of McDonaldet al. can also be obtained. A comparative study between our turn-on delay and those of Harris and McDonaldet al. is also made. It is expected that our definition and analytical expression of turn-on delay will eliminate the drawbacks and confusions of earlier investigations. The present work will find use in critically ascertaining the switching speed of Josephson analogs and digital circuits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00682666
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  • 10
    Electronic Resource
    Electronic Resource
    A semi-descriptive model for predicting residual-P from fertilizer P applications (1989)
    Springer
    Nutrient cycling in agroecosystems 19 (1989), S. 121-126 
    Details
    ISSN: 1573-0867
    Keywords: Descriptive model ; semi-descriptive model ; soil test P ; crop removal ; long term fertilizer experiment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The increasing pressure on world food supplies and the recent increase in the cost of energy and fertilizers point to the need for efficient use of applied nutrients. A semi-descriptive model was developed to predict the change in extractable P with time, assuming that P added through fertilizer and amounts removed in harvested plant products were the main fluxes affecting available P status. The relationship between extractable P and the rate of P fertilization was quadratic. ‘Availability’ coefficients were evaluated from the data of a long term fertilizer experiment at Ludhiana centre. It was assumed that fixation of applied P was accommodated in these, and that practically there was no leaching and run-off of applied P in these soils. Good agreement (r = 0.99**) was found between the predicted and observed soil test P of alluvial soils of Barrackpore and New Delhi, medium black soils of Coimbatore and Jabalpur and sub-montane soil of Palampur centre. The model, however, failed to predict available P of Pantnagar and Hyderabad soils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01054684
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