ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Chemistry  (34)
  • Computer Systems  (10)
  • Fault plane solution, focal mechanism  (2)
  • Fluid Mechanics and Heat Transfer  (2)
  • TEM
  • 1995-1999  (25)
  • 1990-1994  (19)
  • 1965-1969  (4)
  • 1925-1929  (2)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Chemical behaviour of zirconium oxychloride octahydrate and acetic acid in precursor solution for zirconia film formation on glass (1997)
    Springer
    Journal of sol gel science and technology 9 (1997), S. 227-237 
    Details
    ISSN: 1573-4846
    Keywords: zirconium oxychloride octahydrate ; zirconia film ; FTIR spectroscopy ; precursor chemistry ; SIMS ; TEM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Precursor solutions for zirconia films on soda lime silica glass substrate were prepared from zirconium oxychloride octahydrate (ZOO) and acetic acid (HOAC) maintaining the mol ratios, [HOAC]/[ZOO]=2, 4, 6, 8 and 10. A characteristic UV absorption band at ∼280 nm in the ∼120h aged precursor solutions was identified for acetate group of the zirconium acetato complexed species. The presence of acetate ligand coordinated with either ZrOOH+ or [Zr4(OH)8]8+ or with both was predicted by the studies of UV spectra of aged solutions and FTIR spectra of unbaked films on silicon wafer. Dipping technique was followed for film formation. Thicknesses and refractive indices of the baked (450°±5°C) films were in the ranges 1818±20 Å and 1.702–1.762 respectively. The positive SIMS experiment on two typical films baked at 450°±5°C derived from the precursors with [HOAC]/[ZOO]=2 and 6, detected the ionic species, Zr+, ZrO+, ZrO 2 + , Na+, Ca+, Fe+, H+ while the negative SIMS detected O− and Cl−. The relative contents of the ionic species with respect to Zr+ were dependent on the acid content of the precursors. Reflection (%) of the baked films in the UV region was also dependent on the acid content of the precursors. Electron diffraction pattern of the typical baked film derived from the precursor with [HOAC]/[ZOO]=2 exhibited meta-stable cubic phase of zirconia and the grains were found to be elongated (aspect ratio, 2.00–2.33).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02437186
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Chemical Behaviour of Zirconium Oxychloride Octahydrate and Acetic Acid in Precursor Solution for Zirconia Film Formation on Glass (1997)
    Springer
    Journal of sol gel science and technology 9 (1997), S. 227-237 
    Details
    ISSN: 1573-4846
    Keywords: zirconium oxychloride octahydrate ; zirconia film ; FTIR spectroscopy ; precursor chemistry ; SIMS ; TEM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Precursor solutions for zirconia films on soda lime silica glass substrate were prepared from zirconium oxychloride octahydrate (ZOO) and acetic acid (HOAC) maintaining the mol ratios, [HOAC]/[ZOO] = 2, 4, 6, 8 and 10. A characteristic UV absorption band at ∼280 nm in the ∼120 h aged precursor solutions was identified for acetate group of the zirconium acetato complexed species. The presence of acetate ligand coordinated with either ZrOOH+ or [Zr4(OH)8]8+ or with both was predicted by the studies of UV spectra of aged solutions and FTIR spectra of unbaked films on silicon wafer. Dipping technique was followed for film formation. Thicknesses and refractive indices of the baked (450° ± 5°C) films were in the ranges 1818 ± 20 Å and 1.702–1.762 respectively. The positive SIMS experiment on two typical films baked at 450° ± 5°C derived from the precursors with [HOAC]/[ZOO] = 2 and 6, detected the ionic species, Zr+, ZrO+, ZrO2+, Na+, Ca+, Fe+, H+ while the negative SIMS detected O- and Cl-. The relative contents of the ionic species with respect to Zr+ were dependent on the acid content of the precursors. Reflection (%) of the baked films in the UV region was also dependent on the acid content of the precursors. Electron diffraction pattern of the typical baked film derived from the precursor with [HOAC]/[ZOO] = 2 exhibited meta-stable cubic phase of zirconia and the grains were found to be elongated (aspect ratio, 2.00–2.33).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018395509844
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Phenomenological model for the unified studies of different physical properties of polymers (1993)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 207 (1993), S. 9-21 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wird ein phänomenologisches Modell vorgestellt, mit dem sich das Entstehen starker Anisotropien der physikalischen Eigenschaften semikristalliner Polymerer nach einachsigem Verstrecken beschreiben 1äßt. Dieses Modell führt die Temperatur als expliziten Parameter in die Orientierungsfunktion ein. Es enthält zwei frei wählbare Parameter, die für jedes Polymere durch Anpassen der experimentellen Daten der Doppelbrechung als Funktion des Verstreckverhältnisses bei einer bestimmten Temperatur ermittelt werden konnen. Die berechneten Werte für Elastizitätsmodul, thermische Leitfähigkeit und Expansibilität parallel und senkrecht zur Streckrichtung stimmen in einem wäiten Bereich des Verstreckverhältnisses und der Temperatur mit den experimentellen Ergebnissen gut überein.
    Notes: A phenomenological model has been proposed to understand the development of strong anisotropy in physical properties of semicrystalline polymers on uniaxial drawing. The proposed model introduces temperature as an explicit parameter in the orientation function. The model contains two free parameters for each polymer which can be evaluated by fitting the experimental data on birefringence versus draw ratio at a particular temperature. The calculated values of elastic moduli, thermal conductivity and expansibility along and perpendicular to the drawing direction over the entire range of draw ratio and a wide range of temperature are in good agreement with experimental values.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1993.052070102
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Chemiluminescenz bei der Oxydation von Farbstoffen durch Ozon (1928)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 173 (1928), S. 125-136 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Wenn ozonisierter Sauerstoff durch Lösungen von Eosin, Uranin, Safranin, Neutralrot, Rhodamin B, Thioflavin, Cartharamin Rhodamin B. J. N. N., Erythrosin und Aesculin geleitet wird, beobachtet man ein Leuchten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19281730114
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Chemiluminescenz bei der Oxydation von fluorescierenden und nicht fluorescierenden Stoffen durch Wasserstoffperoxyd und Ozon (1929)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 186 (1929), S. 154-158 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Wenn zahlreiche fluorescierende oder nicht fluorescierende Farbstofflösungen durch Wasserstoffperoxyd in Gegenwart von Ferrosulfat oxydiert werden, tritt ein Glimmen auf, das im dunklen Raume zu erkennen ist.2. Die Wellenlangen der Glimmerscheinung bei der Oxydation einiger fluorescierender Fnrbstoffe durch ozonisierten Sauerstoff sind gemessen worden.3. Kieselsaure mit etwas adsorbiertem Neutralrot zeigt in einer Suspension in Äthylallrohol bei Behandlung mit ozonisiertem Sauerstoff eine Glimmerscheinung.4. Wenn kleine Mengen eines Farbstoffes, der gutes Glimmen zeigt , rnit einem anderen Farbstoff von schwachem Glimmvermogen gemischt werden, so liefert das Gemisch bei Behandlung mit Ozon ein starkeres Glimmen als der schwächer glimmende Farbstoff allein.5. Steigerung der Temperatur führt zur Verstarkung des Glimmens bei der Oxydation von Reduktionsmitteln durch Ozon oder Wasserstoffperoxyd.6. Zunahme der Konzentration der Reduktionsmittel verursacht eine Steigerung der Glimmintensitat bis zu einem Grenewert. Wird die Konzentration weiter gesteigert, so schwacht sich das Glimmen ab und hört schließlich auf.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19291860111
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and evaluation of a polyimide containing carbazole and naphthalene moiety (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 28 (1990), S. 3795-3800 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1990.080281322
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    A modeling study of anaerobic biofilm systems: II. Reactor modeling (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 46 (1995), S. 54-61 
    Details
    ISSN: 0006-3592
    Keywords: anaerobic biofilm ; CSTR ; reactors, nonide ; pH ; plug-flow reactors ; biofilm modeling ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A rigorous steady-state model of anaerobic biofilm reactors taking into account acid-base and gas-phase equilibria in the reactor in conjunction with detailed chemical equilibria and mass transfer in acetate-utilizing methanogenic biofilms is presented. The performances of ideal completely stirred tank reactors (CSTRs) and plug-flow reactors, as well as reactors with nonideal hydraulic conditions, are simulated. Decreasing the surface loading rate increases the acetate removal efficiency, while decreasing the influent pH and increasing the buffering capacity improves the removal efficiency only if the bulk pH of the reactor shifts toward more optimal values between 6.8 to 7.0. The reactor can have negative or positive removal efficiencies depending on the start-up conditions. The respiration coefficient plays a critical role in determining the minimum influent pH required for reactor recovery after failure. Having multiple CSTRs-in-series generally increases the overall removal efficiency for the influent conditions investigated. Monitoring of the influent feed quality is critical for plug-flow reactors, becasue failure of the initial sections of the reactor may cause a cascading effect that may lead to a rapid reactor failure. © 1995 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260460108
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    A modeling study of anaerobic biofilm systems: I. Detailed biofilm modeling (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 46 (1995), S. 43-53 
    Details
    ISSN: 0006-3592
    Keywords: acetate ; anaerobic biofilms ; mass transfer ; pH ; biofilm modeling ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A detailed model acetate-utilizing methanogenic biofilms accounting for the diffusion of neutral and ionic species, chemical equilibrium, electroneutrality, gas production within the biofilm, pH-dependent Monod kinetics, and the presence of a concentration boundary layer is presented. The model qualitatively fits the pH profiles that are reported for acetate-utilizing methanogenic aggregates. A sensitivity analysis on the biological parameters showed that the flux of acetate is sensitive to the maximum utilization rate, half-saturation constant, and biofilm density for the bulk conditions investigated. Criteria when traditional biofilm models can be used to predict the flux of acetate into the biofilm are established. If the maximum pH change predicted using a hypothetical system is within ±0.05, the traditional model predicts the flux to within ±5% of the value calculated with the model developed in this study. © 1995 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260460107
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Production, purification, and characterization of xylanase from a hyperxylanolytic mutant of Aspergillus ochraceus (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 35 (1990), S. 244-251 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Enhancement of the productivity of xylanase and β-xy-losidase of Aspergillus ochraceus was investigated by multistep mutagenesis. The spores of the wild strain were subjected to UV and N-methyl-N-nitro-N-nitro-soguanidine (NTG). The hyperxylanolytic mutant (NG-13), which showed good clearing on the surface of the xylan-agar plate, secretes xylanase and β-xylosidase at high levels during growth on commercial xylan and on agricultural wastes. Both liquid and solid state cultures were employed in the study for enzyme production. The xylanase from NG-13 was purified to homogeneity by ammonium sulfate precipitation and gel filtration. This purified enzyme showed a pH optimum of 6.0 and was stable in the range of pH 5 to 10. Prolonged stability of the enzyme was observed at 45°C though its activity was maximal at 50°C. The molecular weight of the enzyme was estimated to be 4.3 × 104 by SDS-polyacrylamide gel electrophoresis and 5 × 104 by gel filtration on Sephadex G-75. The kinetic data showed that the Km and Vmax values for xylan were 1 × 10-3M and 19.6 μmol/ min/mg protein, respectively. The enzyme was both more active and thermostable in the presence of K+and was inactivated by thiol reagents such as Hg2+, p-hydroxymercuribenzoate (PHMB), 3′, 5′-dithiobis (2′-nitrobenzoic acid) (DTNB), and N-ethylmaleimide (NEM).
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260350305
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Crystallization study of a thermoplastic polyimide (new-TPI) (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 737-747 
    Details
    ISSN: 0887-6266
    Keywords: Crystallization ; melting ; morphology ; thermoplastic polyimide ; New-TPI ; PMDA ; 33BAPB ; polarizability ; SAXS ; lamellar thickness ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Crystallization, melting, and morphology of a thermoplastic polyimide (New-TPI) containing pyromellitic dianhydride (PMDA) and 3,3'-bis(4-aminophenoxy) biphenyl diamine (33BAPB) moieties have been studied. This material showed a glass transition temperature (Tg) of 250°C, an equilibrium melting temperature (T°m) of 406°C and a heat of fusion (ΔH) for 100% crystallinity of 6.38 kJ/mol. Measurements of the crystallization bulk rate (by DSC) and spherulite growth rate (by optical microscopy) indicated that the maximum crystallization temperature was about 320°C and the crystallization growth process was three-dimensional under thermal nucleation (the Avrami exponent n ca. 4). The rate of nucleation density was estimated to decrease with increasing temperature, and the product of two crystal surface free energies σeσo was calculated to be 1176 erg2/cm4. The meltgrown spherulite consistently showed a Maltese cross pattern with negative birefringence under cross-polars. The calculation of polarizability along the three unit cell axes suggested that the crystal b axis may be along the spherulite growth (radial) direction. Two scattering maxima were seen in small-angle x-ray scattering (SAXS) profiles. The dominant peak indicated a long period of ca. 20 nm which varied as a function of crystallization temperature. The weak peak at a d-spacing of 2.5 nm was independent of temperature and has been attributed to the chemical repeat distance determined by Okuyama et al. (indexed as 001). The lamellar thickness lc, estimated by the correlation function analysis of the SAXS data, was found to be similar to that determined by the Scherrer analysis of the 001 reflection peak. © 1994 John Wiley & Sons, Inc.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320415
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...