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  • 1
    Electronic Resource
    Electronic Resource
    Control of after-cooking darkening in potatoes with edible film-forming products and calcium chloride (1991)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 39 (1991), S. 2163-2166 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf00012a012
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation and characterisation of synthetic mixtures of lithium isotopes (1998)
    Springer
    Fresenius' journal of analytical chemistry 361 (1998), S. 767-773 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Re-certification of the absolute isotopic composition of the natural lithium isotopic reference material (IRM), IRMM-016, requires measurements calibrated by means of synthetic mixtures of highly enriched lithium isotopes. Ten such mixtures were prepared by weighing and mixing of two well characterised, isotopically enriched, Li2CO3 compounds. The starting materials, 99.9981% enriched 6Li, and 99.9937% enriched 7Li, were purified by ion exchange, and the purified materials converted from LiOH to Li2CO3 by reaction with CO2. Ten new mixtures were prepared by mixing different weighed amounts of these dissolved Li2CO3 carrier compounds. The compounds had an estimated level of impurities of 100 ± 100 μg · g–1 (expanded uncertainty with a coverage factor of 2). In the ten mixtures, the n(6Li)/n(7Li) ratio varies from 0.025 to 14 and the achieved expanded relative uncertainty on the amount ratio prepared is typically 2 · 10–4. These mixtures were then used to determine the correction factor, K, for mass discrimination of the measurement procedure and instrument concerned.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160051013
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  • 3
    Electronic Resource
    Electronic Resource
    Site-specific chemistry of carbon tetrachloride decomposition on GaAs(001) (1998)
    Springer
    Applied physics 66 (1998), S. S501 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 82.15.Gh; 61.72.Vv; 07.79.Cz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 4 , it was discovered that this molecule dissociatively adsorbs onto Ga dimers and second-layer Ga atoms at 473 K. Upon heating to 673 K, the chlorine desorbs from these sites as GaCl, thereby reducing the Ga coverage. Scanning tunneling micrographs reveal that GaCl desorption produces a highly disordered (2×4)surface, and transforms the (4×2) into a new (3×2) reconstruction. The (3×2) surface appears to be stabilized by carbon incorporation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051191
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  • 4
    Electronic Resource
    Electronic Resource
    Context-dependent force coding in motor and premotor cortical areas (1999)
    Springer
    Experimental brain research 128 (1999), S. 123-133 
    Details
    ISSN: 1432-1106
    Keywords: Key words Precision grip ; Context-dependency ; Force ; Finger representation ; Motor cortex ; Premotor cortex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  In three monkeys trained to finely grade grip force in a visuomotor step-tracking task, the effect of the context on neuronal force correlates was quantitatively assessed. Three trial types, which differed in force range, number, and direction of the force steps, were presented pseudo-randomly and cued with the color of the cursor serving as feedback of the exerted force. Quantitative analyses were made on 85 neurons with similar discharge patterns in the three trial types and significant linear positive (54 cells) or negative (31 cells) correlation coefficients between firing rate and force. An analysis of covariance (ANCOVA) showed that the population slopes for 2-step were steeper than for 3-step trials. Another ANCOVA at the population level, computed on the differences in firing rate and force between force steps, persistently disclosed a significant effect of trial type. For the first two force steps, the differences in firing rate were significantly larger in the 2-step than in the 3-step increase trials. Further analyses revealed that neither the force range nor the number of steps was a unique factor. A small group of neurons was tested in an additional trial series with a uniform cue for all three trials, leading to either a loss of context-dependency or to unexpected changes in firing rate. This demonstrates that the cue color was an important instruction for task performance and neuronal activity. The most important findings are that the context-dependent changes were occurring ”on-line”, and that neurons displaying context-dependency were found in all three lateral premotor cortex hand regions and in the primary motor cortex. Finger muscle activity did not show any context dependency. The context-dependent effect leads to a normalization of the cortical activity. The advantage of normalization is discussed and mechanisms for the gain regulation are proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002210050827
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  • 5
    Electronic Resource
    Electronic Resource
    Structure and Function of the Toxoplasma gondii Vacuole (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 797 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb52943.x
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  • 6
    Electronic Resource
    Electronic Resource
    SF"6-sensitized dissociation of UF"6 with a pulsed CO"2 laser
    Amsterdam : Elsevier
    Chemical Physics Letters 101 (1983), S. 69-72 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(83)80307-8
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  • 7
    Electronic Resource
    Electronic Resource
    A pilot process of solid state fermentation from sugar beet pulp for the production of microbial protein
    Amsterdam : Elsevier
    Journal of Fermentation and Bioengineering 73 (1992), S. 203-205 
    Details
    ISSN: 0922-338X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0922-338X(92)90161-M
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  • 8
    Electronic Resource
    Electronic Resource
    DESIGN AND SELECTION OF PROCESSING CONDITIONS OF A PILOT SCALE CONTACTOR FOR CONTINUOUS OSMOTIC DEHYDRATION OF CARROTS (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food process engineering 21 (1998), S. 0 
    Details
    ISSN: 1745-4530
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A pilot-scale belt type osmotic contactor was designed and installed in a continuous osmotic dehydration process to obtain maximum water removal from fruits and vegetables with a minimum contact time. The carrot was chosen as a representative vegetable and a ternary mixture of sucrose/sodium chloride/water with total solids concentration of about 50 to 55% was chosen for the osmotic solution. The experimental results showed that the optimum condition was found to require a 44% sucrose/7% sodium chloride aqueous solution with 16 min of contact time which gave a water loss of 26% and a highest ratio of water loss over solids gain (about 9) among different treatments. It is concluded that the continuous type of contactor can have potential applications in the food industry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4530.1998.tb00440.x
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  • 9
    Electronic Resource
    Electronic Resource
    Hydrogen adsorption on GaAs (001) reconstructions (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 110 (1999), S. 10498-10508 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Hydrogen adsorption on the c(4×4), (2×4), (2×6), and (4×2) reconstructions of GaAs (001) have been characterized by internal-reflection infrared spectroscopy. The infrared spectra contain up to 15 bands due to the stretching vibrations of arsenic hydrides (2150–1950 cm−1), terminal gallium hydrides (1950–1800 cm−1), and bridging gallium hydrides (1800–950 cm−1). These features arise from hydrogen adsorption on arsenic and gallium dimers, and second-layer arsenic and gallium atoms. The large number of peaks observed indicates that the surface atoms exist in a variety of different chemical environments.© 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.478980
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  • 10
    Electronic Resource
    Electronic Resource
    The reaction of carbon tetrachloride with gallium arsenide (001) (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 951-953 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Carbon tetrachloride dissociatively adsorbs on the Ga-rich (4×2) reconstruction of GaAs (001) at 200 °C. Upon heating to 440 °C, the chlorine desorbs as GaCl, which etches the surface. Scanning tunneling micrographs reveal that this reaction transforms the (4×2) into a Ga-rich (3×2) structure that is interlaced with As-rich (2×4) phases. The (3×2) is well ordered, while the (2×4) phases exhibit a high degree of disorder. This work establishes the surface reaction pathway for carbon doping of GaAs with CCl4.© 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120620
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