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  • 1
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    Permeability Effects of Turbulent Flow Through a Porous Insert in a Backward-Facing-Step Channel (2005)
    Springer
    Details
    Publication Date: 2005-04-01
    Print ISSN: 0169-3913
    Electronic ISSN: 1573-1634
    Topics: Geosciences , Technology
    Published by Springer
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  • 2
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    A comparative study of the Indian summer monsoon hydroclimate and its variations in three reanalyses (2012)
    Springer
    Details
    Publication Date: 2012-03-08
    Print ISSN: 0930-7575
    Electronic ISSN: 1432-0894
    Topics: Geosciences , Physics
    Published by Springer
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  • 3
    Electronic Resource
    Electronic Resource
    Functional reconstitution of ion channels from Paramecium cortex into artificial liposomes (1995)
    Springer
    The journal of membrane biology 144 (1995), S. 199-208 
    Details
    ISSN: 1432-1424
    Keywords: Channel reconstitution ; Ca2+-release channel ; Paramecium ; Liposome ; Internal membrane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Toward isolating channel proteins from Paramecium, we have explored the possibility of functionally reconstituting ion channels in an artificial system. Proteins from Paramecium cortex reconstituted with soybean azolectin retained several channels whose activities were readily registered under patch clamp. The most commonly encountered activities were three: (i) a 71-pS cation channel that opens at all voltages unless dior trivalent cations were added to close them, (ii) a 40 pS monovalent cation channel, and (iii) a large-conductance channel that prefers anions and exhibits many subconductance states. These channels survived mild detergent treatments without observable functional alterations. The possible origin of these channels from internal membranes, the possible role of 71-pS channel in internal Ca2+ release, and the prospects of their purification are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00236833
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  • 4
    Electronic Resource
    Electronic Resource
    Cloning and expression of the genes encoding the propene monooxygenase from Xanthobacter, Py2 (1996)
    Springer
    Applied microbiology and biotechnology 44 (1996), S. 582-588 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Xanthobacter Py2 grows on propene as sole carbon source, converting propene to propene oxide (epoxypropane) using an alkene-specific monooxygenase, as the first step in catabolism. Four mutants, NZ1–4, with a propene- propene oxide+ phenotype were isolated by 1-methyl-3-nitro-1-nitroso-guanidine mutagenesis or by enrichment with the suicide substrate vinylidene chloride, and were shown to have lost the ability to convert alkenes to epoxides. All four mutants were complemented by a number of clones of Xanthobacter Py2 chromosomal DNA in the broad-host-range cosmid pLAFR5, some of which appeared to be non-overlapping. Representatives of the different clones obtained were transferred into Xanthobacter autotrophicus JW33 and one, pNY2, the most frequently isolated clone, was shown to express an inducible, fully functional propene monooxygenase. Subcloning revealed that all four mutants were complemented by a 2.4-kb EcoRI-PstI fragment situated at one end of the cosmid insert. However, activity in X. autotrophicus JW33 could only be expressed from pNY2, containing the complete insert (25 kb), suggesting a large operon or some form of long-range control. pNY2 failed to express in E. coli. In X. autotrophicus JW33 [pNY2] at least three new polypeptides were evident after induction with propene compared with a control carrying only the cosmid pLAFR5.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530050603
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  • 5
    Electronic Resource
    Electronic Resource
    An improved stochastic separated flow model for turbulent two-phase flow (2000)
    Springer
    Computational mechanics 24 (2000), S. 491-502 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  An improved stochastic separated flow model is proposed to obtain reasonable statistical characteristics of a two-phase flow. Effects of the history of a particle and its current trajectory position on the mean-square fluctuating velocity of the dispersed phase are continuously considered in this model. Comparing with the conventional model, results using the improved model are more reasonable and can also be obtained more easily. Furthermore, the improved model requires less computational particles for simulating dispersed-phase turbulence at the beginning of the stochastic trajectory. In this paper, an application in turbulent two-phase flow of planar mixing layer is carried out. Numerical results including velocity, mean-square fluctuating velocity, particle number density and pdf of fluctuation velocity of dispersed phase are shown to compare well with experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660050008
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  • 6
    Electronic Resource
    Electronic Resource
    Exposure Assessment of Volatile Organic Compounds from Water in Taiwan Metropolitan and Petrochemical Areas (1997)
    Springer
    Bulletin of environmental contamination and toxicology 59 (1997), S. 708-714 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001289900538
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  • 7
    Electronic Resource
    Electronic Resource
    pH changes at near-electrode surfaces (1983)
    Springer
    Journal of applied electrochemistry 13 (1983), S. 189-207 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Anodic or cathodic processes in which protons are released or consumed, respectively, lead to local pH changes at the electrode surface. The phenomenon is important in several branches of metal finishing, in corrosion, electro-organic synthesis and other branches of applied electrochemistry, as well as being a factor which can invalidate mechanistic investigations. The concept of ‘pHs’ (near-surface pH) is examined, as are the experimental techniques which have been used to measure it. Many of these are inherently weak. Published results are shown to be largely discrepant, both in respect of the magnitude of the effect and even its incidence. Attempts to treat the phenomenon theoretically are briefly summarized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00612481
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  • 8
    Electronic Resource
    Electronic Resource
    Diffusion of symmetrical and spherical solutes in protic, aprotic, and hydrocarbon solvents (1979)
    Springer
    Journal of solution chemistry 8 (1979), S. 461-478 
    Details
    ISSN: 1572-8927
    Keywords: Diffusion ; Stokes Law ; nonelectrolytes ; rare gases ; tetraalkyltins ; tetraalkylmethanes ; carbon tetrachloride ; methane ; hexane ; decane ; tetradecane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The diffusion coefficients of a series of symmetrical tetraalkyltins (tetramethyltin, tetraethyltin, tetrapropyltin, tetrabutyltin, tetradodecyltin) of the gases argon, krypton, xenon, methane, and tetramethylmethane and of carbon tetrachloride and tetraethylmethane in hexane, decane, and tetradecane at 25°C have been determined using the Taylor dispersion technique. Diffusion coefficients for the gases in acetone, 2-propanol, 1-butanol, and 1-octanol were also determined. Deviations from the predictions of Stokes' law were found to be large, and the magnitude of the deviation can be directly related to solute size. The predictions of the Hubbard-Onsager equation were tested using the diffusion data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716005
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  • 9
    Electronic Resource
    Electronic Resource
    An object-oriented database management system for computer-aided design of tall buildings (1998)
    Springer
    Engineering with computers 14 (1998), S. 275-286 
    Details
    ISSN: 1435-5663
    Keywords: Computer-aided design of buildings ; Database management system ; Hierarchical index ; Object-oriented model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract An effective database and database management system is the key to the success of an integrated approach to software engineering applications in general, and Computer-Aided Design (CAD) for structural applications in particular. Due to the inherent nature of CAD data such as dynamic modeling, a wide range of data types, large data volume, etc., the traditional database models, such as hierarchical, network and relational models, are unable to handle the aforementioned applications satisfactorily. An object-oriented data modeling is known to be the most effective approach. However, many of the commercial object-oriented databases are designed for information management, and they are inadequate for CAD application due to the different features of the object-hierarchy and varying data management objectives during the design cycles. This paper presents a hierarchical index-based object-oriented database management model for CAD applications. To deal with the object hierarchy encountered in CAD for the design of tall buildings, the proposed database consists of several salient features: a hierarchical object model, its related storage structure, a data dictionary, a class factory and an index system. The proposed database management model has been implemented into an integrated CAD system for design application of tall buildings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201760
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  • 10
    Electronic Resource
    Electronic Resource
    Laser fluorimetry studies of ionpair aggregation in ionomers derived from copolymers and polymer containing 2-vinylfluorene (1987)
    Springer
    Polymer bulletin 17 (1987), S. 375-381 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Time resolved fluorescence technique was used to demonstrate physically the ionpair aggregation phenomena in the ionomers containing fluorenylsodium as the pendant group along the polymer chains in THF at 25°C. It was found that ionpairs in the ionomer with mole fraction of fluorenylsodium equal to 0.02 did not associate to form stable aggregate. However, the ionpairs would aggregate in those ionomers with higher fluorenylsodium contents. In the homopolymer of vinylfluorenylsodium, extensive aggregation of the ionpairs was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955723
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