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  • 1
    Digitale Medien
    Digitale Medien
    Water adsorption and dielectric properties of lyophilized hemoglobin (1968)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 72 (1968), S. 3098-3105 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j100855a004
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  • 2
    Digitale Medien
    Digitale Medien
    A new approach for determining effective soil hydraulic functions (1998)
    Oxford, UK : Blackwell Science Ltd
    European journal of soil science 49 (1998), S. 0 
    Details
    ISSN: 1365-2389
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: We investigated the possibility of inferring effective hydraulic properties of soil from the structure of the pore space. The aim was to identify structural properties, which are essential for water flow, so that physical experiments may be replaced by direct morphological measurements. The pore structure was investigated in three dimensions by serial sections through impregnated samples. The complex geometry of pore space was quantified in terms of two characteristics: pore-size distribution and pore connectivity. Only pores larger than 0.04 mm were considered. The results were used as input parameters for a pore-scale network model. The main desorption branch of the soil-water characteristic and the corresponding hydraulic conductivity function of the network model were calculated by numerical simulation. The simulation results, which are exclusively based on morphological investigations, were compared with independently measured results from a multi-step outflow experiment. This approach was demonstrated for two centrasting soil materials: the A and B horizons of a silty agricultural soil. The simulations were close to the experimental data, except for the absolute values of the hydraulic conductivity. The pore-size distribution and pore connectivity govern the shape of hydraulic functions and the applied morphometric methods are suitable for predicting essential characteristics of hydraulic soil properties.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2389.1998.4940547.x
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  • 3
    Digitale Medien
    Digitale Medien
    Morphological determination of pore connectivity as a function of pore size using serial sections (1997)
    Oxford, UK : Blackwell Publishing Ltd
    European journal of soil science 48 (1997), S. 0 
    Details
    ISSN: 1365-2389
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: The geometry of pore space in soil is considered to be the key in understanding transport of water, gas and solute. However, a quantitative and explicit characterization, by means of a physical interpretation, is difficult because of the geometric complexity of soil structure.Pores larger than 40 μm within two soil horizons have been analysed morphologically on 3-dimensional digital representations of the pore space obtained by serial sections through impregnated specimens. The Euler-Poincaré characteristic has been determined as an index of connectivity in three dimensions. The pore connectivity is quantified as a function of the minimum pore diameter considered leading to a connectivity function of the pore space. Different pore size classes were distinguished using 3-dimensional erosion and dilation. The connectivity function turned out to differentiate between two soil materials. The pore space in an upper Ah horizon is intensely connected through pores between 40 and 100 μm, in contrast to the pore space in the AhBv beneath it. The morphological pore-size distributions were compared to the pore-size distribution obtained by water retention measurements. The discrepancy between these different methods corresponds to the expectation due to pore connectivity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2389.1997.tb00203.x
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  • 4
    Digitale Medien
    Digitale Medien
    Determination of Aliphatic Aldehydes by Spectrophotometry. (1962)
    s.l. : American Chemical Society
    Analytical chemistry 34 (1962), S. 398-400 
    Details
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ac60183a028
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  • 5
    Digitale Medien
    Digitale Medien
    Coatings Based on Acrylamide Interpolymers (1961)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 53 (1961), S. 461-463 
    Details
    ISSN: 1520-5045
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ie50618a030
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  • 6
    Digitale Medien
    Digitale Medien
    Regulation of Protein Synthesis (1967)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biochemistry 36 (1967), S. 519-538 
    Details
    ISSN: 0066-4154
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Chemie und Pharmazie , Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.bi.36.070167.002511
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  • 7
    Digitale Medien
    Digitale Medien
    Rotational analysis and tunnel splittings of the intermolecular vibrations of the phenol–water complex by high resolution UV spectroscopy (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 4496-4504 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Highly resolved (Δν〈100 MHz) UV-REMPI (ultraviolet-resonantly enhanced multiphoton ionization) spectra of different vibronic bands in the phenol–water complex are presented. The torsional splitting caused by the hindered rotation of the water moiety in the hydrogen-bonded system is investigated. An autocorrelation procedure reveals torsional subbands, a correlation automated rotational fitting (CARF) of the spectra yields the rotational constants: The analyzed vibrations are classified by the rotational constants of the corresponding vibronic band and the symmetry of the torsional state. The transition to the stretching vibration at 156 cm−1 excess energy is shown to consist of two different torsional transitions similar to the electronic origin. The torsional splitting in the origin band is 0.8491(2) cm−1 and that of the stretching vibration is 0.8915(3) cm−1, demonstrating a very small coupling between the stretching and the torsional motion. We assign the 121 cm−1 band as the negative parity component of the transition to the wagging vibration β2 while the band at 125 cm−1 is tentatively assigned as the positive parity component of the same band. The resulting large torsional splitting of −4.596(3) cm−1 points to a strong coupling to the torsional motion. The band at 95 cm−1 has only one torsional parity component within its rotational envelope. The observed large change of its rotational constants does not fit to the pattern of the other vibrations and the band is tentatively assigned as an overtone of the torsional vibration τ with positive parity. © 1998 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.475861
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  • 8
    Digitale Medien
    Digitale Medien
    Small-angle neutron scattering of aqueous dispersions of lipids and lipid mixtures. A contrast variation study (1981)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 14 (1981), S. 191-202 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The present study presents the first small-angle neutron scattering experiment of lipid bilayers in excess water. The method of solvent contrast variation was applied. The variation of scattering intensity with the scattering angle could be analysed in terms of the Kratky–Porod model of scattering by quasi-two-dimensional systems. From this the bilayer thickness of unilamellar vesicles of dimyristoyllecithin was determined to be d = 41 ± 1 Å at 310 K. Several typical mixtures of different lecithins with varying chain lengths and of lecithin with phosphatidic acid were studied. By deuteration of one lipid component a very large contrast between segregated phases could be achieved. It was thus possible to distinguish clearly between homogeneous mixtures and mixtures which exhibit a heterogeneous lipid organization. In the latter case no intensity matching upon solvent contrast variation was possible. It is shown that phase boundaries may be determined very accurately by performing contrast variation experiments with at most two mixtures of different initial composition. The main advantage of the present method is that lateral phase separation may also be clearly studied in fluid states of the bilayer. From the average scattering-length densities one can determine the density of the lipid layers and thus the excess volumes of the mixtures. For lecithin mixtures positive excess volumes are observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889881009102
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  • 9
    Digitale Medien
    Digitale Medien
    Self-assembling functionalized templates in biosensor technology (1998)
    Springer
    Polymer bulletin 40 (1998), S. 151-157 
    Details
    ISSN: 1436-2449
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Abstract. A bifacial topological template exhibiting metal-binding sites and thioalkane chains has been incorporated into self-assembled monolayers and immobilised on gold surfaces: These systems allow for the detection of external ligands by SPR spectroscopy representing a first step in developing biosensors based on the TASP (Template Assembled Synthetic Proteins) concept.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002890050236
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  • 10
    Digitale Medien
    Digitale Medien
    Total cross section for hadron production bye + e − annihilation between 9.4 and 9.5 GeV (1980)
    Springer
    The European physical journal 6 (1980), S. 125-129 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The total cross section fore + e − annihilation into hadrons for center of mass energies from 9.4 to 9.5 GeV has been measured with the nonmagnetic DESY-Heidelberg detector at DORIS. A value ofR=σhad/σµµ=3.8±0.7 for the continuum region around the Υ (9.46) resonance has been determined. The ratioΓ ee Γ had/Γ tot of electronic, hadronic and total widths has been reevaluated to be (1.00±0.23) keV for the Υ resonance and (0.37±0.16) keV for the Υ′. In addition, a search for directly produced pohotons from Υ decays of the type Υ→γ+gluon+gluon has been performed. The Υ decay into muon pairs has also been searched for.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01588838
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