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  • 1
    Electronic Resource
    Electronic Resource
    From Droplet Growth to Film Growth on a Heterogeneous Surface: Condensation Associated with a Wettability Gradient (1995)
    s.l. : American Chemical Society
    Langmuir 11 (1995), S. 627-634 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00002a045
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  • 2
    Electronic Resource
    Electronic Resource
    Auditory collusion and a coupled couple of outer hair cells (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 399 (1999), S. 359-362 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The discrepancies between measured frequency responses of the basilar membrane in the inner ear and the frequency tuning found in psychophysical experiments led to Békésy's idea of lateral inhibition in the auditory nervous system. We now know that basilar membrane tuning can ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/20686
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructural Development of Calcium alpha-SiAlON Ceramics with Elongated Grains (1999)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 82 (1999), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Silicon nitride (Si3N4) and SiAlONs can be self-toughened through the growth of elongated β-Si3N4/β-SiAlON grains in sintering. α-SiAlONs usually retain an equiaxed grain morphology and have a higher hardness but lower toughness than β-SiAlONs. The present work has demonstrated that elongated alpha-SiAlON grains can also be developed through pressureless sintering. alpha-SiAlONs with high-aspect-ratio grains in the calcium SiAlON system have exhibited significant grain debonding and pull-out effects during fracture, which offers promise for in-situ-toughened α-SiAlON ceramics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.1999.tb20079.x
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  • 4
    Electronic Resource
    Electronic Resource
    Specific labeling approaches to guanine and adenine imino and amino proton assignments in the AMP–RNA aptamer complex (1997)
    Springer
    Journal of biomolecular NMR 9 (1997), S. 55-62 
    Details
    ISSN: 1573-5001
    Keywords: Site-specific labeling of RNA ; 15N labeling of guanine and adenine ; Inosine-for-guanine substitution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The secondary structure of a recently identified ATP-binding RNA aptamer consists of apurine-rich 11-residue internal loop positioned opposite a single guanine bulge flanked oneither side by helical stem segments. The ATP ligand targets the internal loop and bulgedomains, inducing a structural transition in this RNA segment on complex formation.Specifically, 10 new slowly exchanging proton resonances in the imino, amino and sugarhydroxyl chemical shift range are observed on AMP–RNA aptamer complex formation.This paper outlines site-specific labeling approaches to identify slowly exchanging imino(guanine) and amino (guanine and adenine) protons in internal loop and bulge segments ofcompact RNA folds such as found in the AMP–RNA aptamer complex. One approachincorporates 15N-labeled guanine (N1 imino and N2 amino positions) and 15N-labeledadenine (N6 amino position), one residue at a time, in the AMP-binding RNA aptamer, withlabeling incorporation through chemical synthesis facilitated by generating the aptamer fromtwo separate strands. The unambiguous assignments deduced from the 15N labeling studieshave been verified from an independent labeling strategy where individual guanines in theinternal loop have been replaced, one at a time, by inosines and assignments were made onthe basis of the large 2 ppm downfield shift of the guanine imino protons on inosinesubstitution. The strengths and limitations of the inosine-for-guanine substitution approachemerge from our studies on the AMP–RNA aptamer complex. The assignment of theinternal loop and bulge imino and amino protons was critical in our efforts to define thesolution structure of the AMP–RNA aptamer complex since these slowly exchangingprotons exhibit a large number of long-range intramolecular NOEs within the RNA, as wellas intermolecular NOEs to the AMP in the complex. The current application of specific 15Nand inosine labeling approaches for exchangeable imino and amino proton assignments in thenonhelical segments of an RNA aptamer complex in our laboratory complements selective 2Hand 13C approaches to assign nonexchangeable base and sugar protons in RNA andligand–RNA complexes reported in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018623601946
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis, characterization and antitumor activity of benzalde- hyde nitrogen mustard picolinoyl hydrazone complexes (1999)
    Springer
    Transition metal chemistry 24 (1999), S. 206-209 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract CuII, NiII, CoII, ZnII and CdII complexes of picolinamido-4-bis(2-chloroethyl)aminobenzaldimine (PBAB) have been synthesized and characterized by elemental analysis, conductivity, i.r. u.v.-vis. and e.p.r. spectra. The results suggest a square planar structure for the CuII complex, a tetrahedral geometry for the ZnII and CdII complexes and an octahedral structure for the CoII and NiII complexes. The complexes have been screened for antitumor activity against SMMC-7721 human liver cancer cell line; all of them exhibit biological activity at high concentrations for the cell line studied and a synergic effect between CuII and PBAB is evident.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006944113769
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  • 6
    Electronic Resource
    Electronic Resource
    Kinetics of inhibition of alkaline phosphatase from green crab (Scylla serrata) by N-bromosuccinimide (1996)
    Springer
    The protein journal 15 (1996), S. 345-350 
    Details
    ISSN: 1573-4943
    Keywords: Alkaline phosphatase ; inhibition ; chemical modification ; N-bromosuccinimide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The inactivation of alkaline phosphatase from green crab (Scylla serrata) by N-bromosuccinimide has been studied using the kinetic method of the substrate reaction during modification of enzyme activity previously described by Tsou [(1988),Adv. Enzymol. Related Areas Mol. Biol. 61, 381–436]. The results show that inactivation of the enzyme is a slow, reversible reaction. The microscopic rate constants for the reaction of the inactivator with free enzyme and the enzyme-substrate complex were determined. Comparison of these rate constants indicates that the presence of substrate offers marked protection of this enzyme against inactivation by N-bromosuccinimide. The above results suggest that the tryptophan residue is essential for activity and is situated at the active site of the enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01886860
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  • 7
    Electronic Resource
    Electronic Resource
    A DYNAMIC SUBGRID-SCALE MODEL FOR LOW-REYNOLDS-NUMBER CHANNEL FLOW (1996)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 23 (1996), S. 19-27 
    Details
    ISSN: 0271-2091
    Keywords: turbulence ; channel flow ; low Reynolds number ; large-eddy simulation ; subgrid-scale model dynamic SGS model ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Several issues related to applications of the dynamic subgrid-scale (SGS) model in large-eddy simulation (LES) at low Reynolds number are investigated. A modified formulation of the dynamic model is constructed and its performance in low-Reynolds-number LES of channel flow is assessed through a comparison of length scales computed respectively by this modified model, the Germano-Lilly dynamic SGS model and two empirical wall damping functions with optimum model coefficients, which have been successfully used in many simulations of channel flows. Two values of the ratio of filter widths are set for each of the dynamic models. The results have confirmed that the modified dynamic SGS model gives the correct behaviour of the subgrid eddy viscosity in the region of a plane wall to an accuracy that exceeds the best-tuned wall damping function, and almost collapses with the theoretical behaviour of the length scale near the wall without any tuning and adjustment. In addition, the impact of the choice of the ratio of filter widths on the modified dynamic SGS model is found to be much less than with the Germano-Lilly model.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxidation of methanol catalyzed by silica-supported polystannazane-copper complex (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 73-75 
    Details
    ISSN: 1042-7147
    Keywords: oxidation ; methanol ; polymer-copper complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Silica-supported polystannazane-copper complex has been prepared and used as a catalyst for the oxidation of methanol. The results showed that the catalyst could catalyze the oxidation of methanol to formaldehyde at a high yield and selectivity at 30°C and under 1 atm mild conditions. The N/Cu mole ratio in the complex, temperature and the amount of NaOH additive had much influence on the catalytic activity. The complex was stable during the reaction and could be used repeatedly.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxygenation of diphenyl methanol catalyzed by a platinum complex of magnesium oxide-supported polytitazane (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 726-728 
    Details
    ISSN: 1042-7147
    Keywords: diphenyl methanol ; oxygenation ; polytitazane-platinum complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Magnesium oxide-supported polytitazane-platinum complex has been found to catalyze the oxygenation of diphenyl methanol with high yield and high selectivity at 140°C and 1 atm O2. The N/Pt molar ratio, temperature and solvent had great influence on the activity of the catalyst.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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