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  • 1
    Electronic Resource
    Electronic Resource
    Lipoprotein Creams: Utilization of Multifunctional Ingredients for the Preparation of Cosmetic Emulsions with Excellent Skin Compatibility (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: Lipoproteins are plant-derived surface-active biopolymers, which act as emulsifying as well as viscosity-enhancing agents in oil-in-water emulsions. Depending on the degree of hydrolization, lipoproteins are dispersible or even soluble in water. In the presence of low to medium polar oils, lipoproteins are adsorbed and align at the oil-water interface, whereas in mixtures with high polar oils the lipoproteins are repelled from the oil-water interface. The water-dispersible lipoproteins show higher interfacial activity than the hydrolysates.Lipoproteins bear a negative electric charge in aqueous dispersions at pH 6.5, which is probably the reason for the stabilization of oil droplets against coalescence. Lipoprotein creams were characterized in terms of particle size, rheology, and emulsion stability against sedimentation, which was evaluated by a near-infrared sedimentometer.After topical application, emulsion stability breaks down and an emulsion film is formed on the skin surface. Lipoprotein creams cause a distinct increase in skin pliability and skin moisture and show excellent skin compatibility. In a home use test the panelists appreciated the cosmetic and caring properties of the lipoprotein cream.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1467-2494.1999.201639.x
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal resistance of InGaAs/InP laser diodes (1990)
    Springer
    Journal of thermal analysis and calorimetry 36 (1990), S. 1441-1456 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Ergebnisse einer theoretischen und experimentellen Untersuchung des thermischen Verhaltens von InGaAsP/InP Laserdioden mit Stegwellebleiterstruktur wurden dargelegt. Es wurde gezeigt, da\ der grö\te Teil des WÄrmeflusses durch das InP-Substrat geleitet wird, nur weniger als 1/4 durch den Steg. Man bestimmte den Temperaturanstieg in der aktiven Zone und berechnete für verschiedene Struktur- und Montageparameter die thermische Widerstand. Theoretische und experimentelle Ergebnisse stimmen gut miteinander überein. Die Änderung der thermischen BestÄndigkeit verglichen mit einem Normwert von 67 K/W wird in AbhÄngigkeit der Strukturparameter untersucht. Sie wird durch chiplÄnge Stegbreite und Bindungsparameter stark beeinflu\t.
    Notes: Abstract Results of theoretical and experimental investigations of the thermal behaviour of InGa-AsP/InP laser diodes with a ridge-waveguide structure are presented. It is shown that, in contrast to GaAlAs/GaAs laser diodes, most of the heat flux is carried through the InP-substrate, less than 1/4 through the ridge. The temperature rise in the active region was determined and the thermal resistance calculated for various structure and bond parameters. The theoretical and experimental results fit very well. The change of the thermal resistance compared to a norm value of 67 K/W with variation of structure parameters is discussed. It is strongly affected by the device length, the ridge width and the bonding parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01914067
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of the thermal impedance of laser diodes via thermal transients (1988)
    Springer
    Journal of thermal analysis and calorimetry 34 (1988), S. 1311-1320 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mittels Messung thermischer Einschwingvorgänge wurde die thermische Impedanz von Laserdioden bestimmt. Auf Grundlage des Sprungverhaltens wurden die Parameter eines äquivalentenR-C-Gliedes ermittelt, das mit der wahren Schichtenstruktur verglichen wurde. Mittels dieser Methode wurde der Einfluss von Struktur, Aufbau und Alterung auf die Temperaturverteilung untersucht.
    Abstract: РЕжУМЕ пУтЕМ ИжМЕРЕНИь тЕРМ ИЧЕскИх пЕРЕхОДОВ Бы л ОпРЕДЕлЕН тЕРМИЧЕск ИИ ИМпЕДАНс лАжЕРНых ДИОДОВ. НА Ос НОВЕ пЕРЕхОДНОИ хАРА ктЕРИстИкИ БылИ сОстАВлЕНы пАРА МЕтРы кАкОИлИБО ЁкВИВАлЕНтНОИR-C цЕпИ, кОтОРАь БылА жАтЕМ сОпОстАВлЕНА с РЕАль НОИ слОИстОИ стРУктУРОИ УстРОИст ВА. ЁтИМ МЕтОДОМ БылО И жУЧЕНО ВлИьНИЕ стРУктУРы, сх ЕМы МОНтАжА А стАРЕНИь НА тЕМпЕРАт УРНОЕ РАспРЕДЕлЕНИЕ.
    Notes: Abstract The thermal impedance of laser diodes was determined by the measurement of thermal transients. The parameters of an equivalent R-C network were synthesized from the transient response. The network was compared with the real layer structure of the device. The effects of structure, mounting and aging on the temperature distribution were investigated with this method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01914355
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  • 4
    Electronic Resource
    Electronic Resource
    Thermal resistance of ridge-waveguide laser diodes based on GaAs, GaSb or InP (1991)
    Springer
    Journal of thermal analysis and calorimetry 37 (1991), S. 61-71 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurde der Einfluß verschiedener Substrate (GaAs, GaSb und InP) auf die thermischen Eigenschaften von Laserdioden mit gefurchter Hohlleiterstruktur untersucht. Laserdioden mit dem gleichen geometrischen Grundaufbau zeigen verschiedene Wärmewiderstände. Die Ursache ist folglich der Unterschied in der Wärmeleitfähigkeit der Substrate und der Verbindungen der aktiven Schicht. Dies führt zu einer unterschiedlichen Temperaturverteilung in der Strukturen. Theoretische Ergebnisse werden durch experimentelle Daten bekräftigt.
    Notes: Abstract The effects of different substrates (GaAs, GaSb and InP) on the thermal properties of laser diodes with a ridge-waveguide structure are presented. Laser diodes with the same basic geometry exhibit different thermal resistances. The reason is therefore the difference in thermal conductivity of the substrates and the active layer compounds. This leads to different temperature distributions in the structures. The theoretical results were supported by experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01913081
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  • 5
    Electronic Resource
    Electronic Resource
    Mehle und Backwaren (1907)
    Springer
    European food research and technology 14 (1907), S. 715-720 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02008760
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  • 6
    Electronic Resource
    Electronic Resource
    Spirituosen und Essig (1907)
    Springer
    European food research and technology 14 (1907), S. 720-727 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02008761
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  • 7
    Electronic Resource
    Electronic Resource
    Allgemeine analytische Methoden und Apparate (1907)
    Springer
    European food research and technology 14 (1907), S. 525-531 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02008870
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