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  • 1995-1999  (137)
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  • 1
    facet.materialart.
    Unknown
    I−Vcharacteristics of co-planar metal-semiconductor-metal nanojunctions (1998)
    EDP Sciences
    Details
    Publication Date: 1998-07-01
    Print ISSN: 1286-0042
    Electronic ISSN: 1286-0050
    Topics: Physics
    Published by EDP Sciences
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    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Fabrication of submicrometre buried gold - palladium wires on using electron beam lithography (1996)
    Institute of Physics
    Details
    Publication Date: 1996-06-01
    Print ISSN: 0957-4484
    Electronic ISSN: 1361-6528
    Topics: Physics
    Published by Institute of Physics
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  • 3
    Electronic Resource
    Electronic Resource
    Simple apparatus for contact angle measurements by the heavy drop method (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 4324-4327 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An apparatus for measuring contact angles by the heavy drop method is proposed. After a few introductory considerations, the article reviews some experimental methods and shows their main advantages and drawbacks. In the heavy drop method, the mean contact angle of a liquid on a solid is calculated from a measurement of the height in the central zone of a large pancake-like drop. This measurement is based in turn on partial occultation of a parallel light beam, detected by a photodiode. Connected to a microcomputer for data storage and processing, the device allows investigations to be made of either static or dynamic phenomena by contact angle and/or contact angle hysteresis measurements; it is simple and well suited to various problems of surface characterization. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1150073
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  • 4
    Electronic Resource
    Electronic Resource
    RESEARCH OF SELECTIVE TESTS FOR DISCERNING “AN EFFICIENT ASSESSOR” IN TEXTURE PROFILING (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of sensory studies 10 (1995), S. 0 
    Details
    ISSN: 1745-459X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: To find selective and predictive tests in texture profiling, a series of 20 tests and 2 texture profiles were submitted to 25 subjects. Selection was carried out according to ranking, scoring and a texture property knowledge questionnaire. Two profiles were then done on 5 Bolognese sauce and 8 rice samples. Assessors were assessed by Spearman correlation coefficients for ranking tests, F values for scoring, average square canonical correlation coefficients for measuring the dimensionality of individual sample space, product discrimination and response repeatability for both Bolognese sauce and rice samples.Characterization test results showed that subject ability varied widely according to the test and the profile. Only one significant relationship between the texture property knowledge test and rice profile performances was found. More tests were successfully related to one or several texture attributes of both profiles. The ability to complete a complex profile could be discerned, albeit with difficulty, through simple selection tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-459X.1995.tb00015.x
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  • 5
    Electronic Resource
    Electronic Resource
    Study of bimetallic Pd–Pt clusters in both free and supported phases (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 8574-8585 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We study PdPt bimetallic clusters in both free and supported phases. These clusters have been produced with a laser vaporization source. Free clusters directly produced by the source are studied by time of flight mass spectrometry and photofragmentation technique. We observed a sequential evaporation of Pd atoms in the mixed clusters consistent with a palladium segregation process. This tendency has been also observed on supported particles from which the structure and the composition are determined by high resolution transmission electron microscopy and energy dispersive x-ray analysis. A main result is that each particle has the composition of the massic rod vaporized in the source. The supported particles are well crystallized and exhibit truncated octahedron shapes. Experimental observations are well explained using a modified tight binding model. Indeed, within this model, we found that the equilibrium shape is strongly related to the variation of the cohesive energy with atomic coordination number. Also, some preliminary results on the specific reactivity of these bimetallic clusters are presented. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468847
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  • 6
    Electronic Resource
    Electronic Resource
    Effects on NF-κB1/p105 processing of the interaction between the HTLV-1 transactivator Tax and the proteasome (1996)
    [s.l.] : Nature Publishing Group
    Nature 381 (1996), S. 328-331 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIG. 1 Isolation by yeast two-hybrid screening of two subunits of the 20S proteasome, HsN3 and HC9, that interact with Tax. a, b, Clones isolated corresponding to HsN3 (a) and to HC9 Ob). For HsN3, eight different cDNAs CLQ2 c were obtained, one of which was found five times. Of three HC9 cDNAs, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/381328a0
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  • 7
    Electronic Resource
    Electronic Resource
    Crystal and magnetic structure of piezoelectric, ferrimagnetic and magnetoelectric aluminium iron oxide FeAlO3 from neutron powder diffraction (1996)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 217-222 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The crystal structure of FeAlO3 has been determined at T = 298 K by neutron diffraction, using polycrystalline samples prepared in a high state of purity. The space group is Pna21, Z = 8; a = 4.9839 (1), b = 8.5544 (2), c = 9.2413 (2) Å. The structure, which is isomorphous to that of FeGaO3, can be described as a double combination of hexagonal and cubic closed packing of oxygen ions. There are four different cation sites labelled Fe1, Fe2 (predominantly occupied by iron), Al1 and Al2 (predominantly occupied by aluminium). The oxygen environment of Al1 forms an almost regular tetrahedron. The other sites have a distorted octahedral environment, especially irregular for Fe1 and Fe2. The fractions fi of iron ions over the four cation sites are: f1 = 0.78 (1), f2 = 0.76 (1), f3 = 0.10 (1) and f4 = 0.34 (1). Neutron diffraction at T = 30 K reveals a classical Néel ferrimagnetism, the direction of easy magnetization being a, with strong `180° cation-anion-cation' super-exchange antiferromagnetic interactions Fe1—O—Fe2 and Fe1—O—Al2 (Al2 being a site occupied by 0.34 Fe). The Néel sublattices are A = Fe1 + Al1 and B = Fe2 + Al2. The average magnetic moment per atom is weak (3.4 ± 0.3 μB) and the spontaneous magnetization at T = 30 K is extremely weak: 0.38 ± 0.17 μB per atom. Piezoelectricity probably originates in the bond arrangement of the four tetrahedral All sites in the unit cell, each tetrahedron being oriented with an Al1—O bond parallel to the polar c axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108768195010330
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  • 8
    Electronic Resource
    Electronic Resource
    Thermal stability of electrodeposited Ni–P alloys (1997)
    Springer
    Journal of applied electrochemistry 27 (1997), S. 1193-1197 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Ni–P alloys were electrodeposited from phosphorous acid solutions in order to study their thermostructural stability, thermal desorption, and dimensional modifications during heat treatments. The quantity of phosphorus codeposited is not a linear function of the bath phosphorous acid content. X-ray diffraction shows that three characteristic composition ranges can be defined. In the first, corresponding to a Ni–P solid solution containing up to 9at% of phosphorus, the microstructural refining is attended by a disappearance of the (100) preferential orientation. Simultaneously with this textural change, a slight adsorption of hydrogen is observed. Beyond 9at% of phosphorus, the microcrystallized alloys are preferentially oriented in the [111] direction, and the gradual amorphization of Ni–P alloys is attended by adsorption of a very high volume of hydrogen. Beyond 17at% of phosphorus, the alloys are amorphous and the amount of hydrogen included during the electrocrystallization is at its maximum. A large part of the hydrogen is desorbed before the crystallization temperature and less of it is desorbed during the crystallization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018423701791
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  • 9
    Electronic Resource
    Electronic Resource
    Structure and thermal stability of zinc–nickel electrodeposits (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 1045-1051 
    Details
    ISSN: 1572-8838
    Keywords: electrodeposition ; structure ; thermal stability ; zinc–nickel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract ZnNi alloys were electrodeposited from a chloride bath on steel substrates. The effect of nickel bath concentration on chemical composition, structure and microstructure of the deposits is demonstrated. From 0 to 13 nickel, the phases obtained do not correspond to that reported on the thermodynamic phase diagram. It is shown that the substitution of zinc by nickel is responsible for the formation of distorted ηd and γd phases corresponding to the supersaturated hexagonal η phase of zinc and to the unsaturated cubic γ phase of Zn–Ni alloy, respectively. Differential scanning calorimetry indicates that the thermal instability of the alloys containing up to 13 wt of nickel, results from the crystallization of the δ phase from the ηd and γd phases at around 200 °C and 250 °C, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003574625112
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  • 10
    Electronic Resource
    Electronic Resource
    Reactivity and codeposition of Co3O4 powderswith nickel in a Watts bath (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 1227-1233 
    Details
    ISSN: 1572-8838
    Keywords: Co3O4 oxide particles ; oxide characteristics ; oxide reactivity ; pH changes ; adsorption-desorption phenomena ; composite coatings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The effect of the physico-chemical characteristics of Co3O4 powders on their reactivity in solution and their incorporation in a nickel matrix has been investigated in a Watts nickel plating bath. The results showed that the surface area of the powder present in suspension not only catalyses the adsorption or desorption phenomena occurring at the particle/solution interface but also has a significant effect on the incorporation of the particles into the nickel matrix. It has been found that the use of Co3O4 with high specific surface area (40m2g−1) significantly limits the growth rate of the electrodeposited composite coatings. Furthermore, it has been shown that the codeposition of these more reactive particles leads to significant changes in the microstructure and texture of the nickel matrix. Finally, it has been found that, according to their specific surface areas, the amount of H+, Ni2+ and Ni[B(OH)4]+ ions adsorbed on the Co3O4 oxide surfaces and the quantities of particles codeposited can vary considerably.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003425018598
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