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  • 1
    Electronic Resource
    Electronic Resource
    Einführung in die Tonphotographie. (1933)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 37 (1933), S. 539-539 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150346a022
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  • 2
    Electronic Resource
    Electronic Resource
    Band-gap renormalization and band filling in Si-doped GaN films studied by photoluminescence spectroscopy (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 4400-4402 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied band-gap renormalization and band filling in Si-doped GaN films with free-electron concentrations up to 1.7×1019 cm−3, using temperature-dependent photoluminescence (PL) spectroscopy. The low-temperature (2 K) PL spectra showed a line-shape characteristic for momentum nonconserving band-to-band recombination. The energy downshift of the low-energy edge of the PL line with increasing electron concentration n, which is attributed to band-gap renormalization (BGR) effects, could be fitted by a n1/3 power law with a BGR coefficient of −4.7×10−8 eV cm. The peak energy of the room-temperature band-to-band photoluminescence spectrum was found to decrease as the carrier concentration increases up to about 7×1018 cm−3, followed by a high-energy shift upon further increasing carrier concentration, due to the interplay between the BGR effects and band filling. The room-temperature PL linewidth showed a monotonic increase with carrier concentration, which could be described by a n2/3 power-law dependence. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371377
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  • 3
    Electronic Resource
    Electronic Resource
    Deposition and analysis of silicon clusters generated by laser-induced gas phase reaction (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 5302-5306 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Silicon clusters have been generated by CO2-laser-induced decomposition of SiH4 in a flow reactor. By introducing a conical nozzle into the reaction zone, they are extracted into a molecular beam apparatus and analyzed with a time-of-flight mass spectrometer. The mass spectra show that the cluster source emits, besides small clusters, also nanosized species containing around 103 atoms. These clusters were deposited on silicon and sapphire targets at room temperature. The deposited films have been analyzed with a Raman spectrometer and with a field emission scanning electron microscope (FE-SEM). The Raman spectra reveal a broad amorphouslike band and a relatively sharp peak at 518.1 cm−1. Interpretation of the sharp Raman feature, based on the phonon confinement model, suggests the presence of silicon nanocrystallites in the deposited films with a particle size of about 3–3.6 nm in diameter. The FE-SEM micrographs show an agglomerate of spherical particles of 3–12 nm in diameter, with a pronounced maximum in the size distribution at around 3.5 nm. The various methods of characterization allow us to conclude that the size of the nanoclusters is largely preserved if they are deposited on the substrate. Therefore, the technique presented here might be an efficient means to produce silicon quantum dots of about 3 nm in diameter. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360737
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic losses in stripline/microstrip circulators : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5739-5741 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have included losses in the analysis of a 3N-port stripline/microstrip circulator and have reformulated the circulation conditions previously postulated for the lossless case. Our calculations have been compared to three published data on circulator designs biased below and above ferrimagnetic resonance. Scattering parameters at each port have been calculated as a function of assumed material losses and coupling capacitance of a multiport circulator. Wide transmission band or wide stop bands may be possible for a six port circulator biased above ferrimagnetic resonance. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361848
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  • 5
    Electronic Resource
    Electronic Resource
    Potential cosmetic applications of reconstructed epidermis (1999)
    Dordrecht, The Netherlands : Blackwell Science Ltd
    International journal of cosmetic science 21 (1999), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Various models of reconstructed epidermis already provide useful tools for safety and efficacy assessment of cosmetic products. However, the majority of these in vitro models are composed of keratinocytes only. Recently, the introduction of melanocytes into epidermal reconstructs has considerably enlarged their field of application. Depending on the melanocyte donor, the different phototypes (I–VI) as well as the racial specific pigmentation, caucasian, Asiatic or black epidermis can be reproduced in vitro. The reconstructed pigmented epidermis allows the evaluation of modulators of melanogenesis such as the depigmenting agent kojic acid. In contrast to conventional melanocyte cultures, the pigmented reconstructed epidermis is air-exposed and covered, as in vivo, with a stratum corneum. This allowed us to evaluate the effect of UV-irradiations on the epidermis and its protection by topically applied sunscreens. The introduction of resident epidermal Langerhans cells into the reconstructed epidermis remained an important challenge. We succeeded by seeding blood derived CD34+ hematopoietic progenitors onto a reconstructing epidermis composed of keratinocytes and melanocytes. The resulting pigmented epidermis shows melanocytes in the basal layer and resident epidermal Langerhans cells suprabasally. As in normal skin, the melanocytes transfer melanin to the neighboring keratinocytes, and the Langerhans cells express major histocompatibility complex class II molecules, CD1a antigen and Birbeck granules. This reconstructed epidermis, comprising for the first time the three major epidermal cell types, has the potential to serve in the near future as a predictive model for immuno-pharmaco-toxicological in vitro studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1467-2494.1999.183571.x
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  • 6
    Electronic Resource
    Electronic Resource
    Use of Umbrella Sampling in the Calculation of the Potential of Mean Force for Maltose in Vacuum From Molecular Dynamics Simulations (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 11339-11343 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100029a007
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  • 7
    Electronic Resource
    Electronic Resource
    Plant Genomes: A Current Molecular Description (1995)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology and Plant Molecular Biology 46 (1995), S. 395-418 
    Details
    ISSN: 1040-2519
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pp.46.060195.002143
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  • 8
    Electronic Resource
    Electronic Resource
    Coal: Energy Keystone (1976)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 1 (1976), S. 37-63 
    Details
    ISSN: 0362-1626
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.eg.01.110176.000345
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  • 9
    Electronic Resource
    Electronic Resource
    Pressure dependence of the thermolysis of tetramethyl-1,2-dioxetane: the volume of activation and its mechanistic implications (1976)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 98 (1976), S. 8181-8185 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00441a049
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  • 10
    Electronic Resource
    Electronic Resource
    HEAT-INDUCED GELATION OF PEANUT PROTEIN/WHEY PROTEIN BLENDS (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 43 (1978), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Whey protein concentrate dispersions formulated at 7.5% or more of protein formed strong gels when heated at temperatures above 80°C. Quantitative gel strength calculated from penetration force data generally increased with heating temperature to 110°C. Increasing pH from 7.0 to 9.0 generally decreased the gel strength of whey protein concentrate. At a total protein concentration of 10%, gel strength was lower when peanut flour protein was 25% or more of a mixture with whey protein. Only weak gels were formed with heating protein blends formulated with peanut protein at greater than 50% of total protein. Sodium chloride (up to 0.5M) and calcium chloride (up to 30 mM) increased gel strength of whey protein and blended systems, but decreased gel strength of dispersions containing only peanut flour. Calcium chloride at 30 mM destroyed gelation ability of peanut flour causing protein precipitation. Gel strength of whey protein increased with moderate cysteine addition and was maximum at a level of 25 mM cysteine. Addition of 100 mM cysteine dramatically reduced whey protein gel strength. Cysteine addition decreased gel strength of peanut flour dispersions and had a varied effect on blended protein systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1978.tb02366.x
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