ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • Springer  (44)
  • American Chemical Society  (24)
  • Oxford University Press  (3)
  • 2000-2004  (20)
  • 1990-1994  (30)
  • 1950-1954  (21)
Collection
Years
Year
  • 1
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Computing 46 (1991), S. 343-353 
    ISSN: 1436-5057
    Keywords: PLA-folding ; vertex separation ; complexity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Zwei diskrete Optimierungsprobleme beim VLSI-Design sind die Fläche eines programmierbaren logischen Arrays (PLA) zu reduzieren und einen Graphen in möglichst gleich große Teilgraphen zu zerlegen. Wir zeigen, daß eine in der Praxis oft benutzte Flächenreduktionstechnik, das Blockfolding, äquivalent ist zu dem Problem, Graphen durch Wegnahme von Knoten zu zerlegen. Es wird gezeigt, daß dieses Problem schon für 3-reguläre GraphenNP-schwer ist.
    Notes: Abstract Two discrete optimization problems arising in VLSI are to reduce the area of a programmable logic array (PLA) and to separate graphs uniformly. We show that a commonly used area reduction technique called blockfolding is equivalent to separating graphs by vertex deletion. The later problem is shown to be NP-complete even for 3-regular-graphs.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 133 (1952), S. 237-243 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Im Anschluß an die Arbeiten VonThilo undJander wird das kontinuierliche Absorptions- und das rote Fluoreszenzspektrum des Rubins in Abhängigkeit von der Chromkonzentration zwischen Null und 100 Mol- % Chromgehalt photographisch-photometrisch untersucht. Der vonThilo undJander beobachtete Farbumschlag von Rot auf Grün bei steigendem Chromgehalt wird auf eine Verschiebung der Lage der kontinuierlichen Absorptionen zurückgeführt. Gleichzeitig zeigt sich starke Konzentrationslöschung der roten Fluoreszenz. Es werden einige Schlußfolgerungen hinsichtlich der im Rubin auftretenden Prozesse aus den bis jetzt bekannten Tatsachen gezogen.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Neutron scattering has been employed to study the crystalline electric field (CEF) interaction at the Ho3+ site in Bi2Sr2Ca0.5Ho0.5Cu2O8+x. The observed energy spectra exhibit a large number of broad but well-resolved CEF transitions between 1.2 and 73 meV, so that we have been able to unambiguously determine all nine CEF parameters required for the average orthorhombic symmetry. The unusually large line widths of the CEF transitions are shown to be related to the modulated structure. The CEF potential is essentially governed by the charge distribution of the CuO2 planes which turns out to be very similar as in HoBa2Cu3O7-x.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of industrial microbiology and biotechnology 7 (1991), S. 27-34 
    ISSN: 1476-5535
    Keywords: Bacterium ; Fermentation ; Nutrition ; Optimization ; Liquefaction ; High-substrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary An alternative process for industrial lactic acid production was deveooped using a starch degrading lactic acid producing organism,Lactobacillus amylovorus B-4542. In this process, saccharification takes place during the fermentation, eliminating the need for complete hydrolysis of the starch to glucose prior to fermentation. The cost savings of this alternative are substantial since it eliminates the energy input, separate reactor tank, time, and enzyme associated with the typical pre-fermentation saccharification step. The only pre-treatment was gelatinization and enzyme-thinning of the starch to overcome viscosity problems associated with high starch concentrations and to make the starch more rapidly degradable. This fermentation process was optimized for temperature, substrate level, nitrogen source and level, mineral level, B-vitamins, volatile fatty acids, pH, and buffer source. The rate of the reaction and the final level of lactic acid obtained in the optimized liquefied starch process was similar to that obtained withL. delbrueckii B-445 using glucose as the substrate.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 52 (1994), S. 734-741 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 36-37 (1951), S. 553-560 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Using simplifying assumptions, a formula was derived for the migration velocity of the zones in the chromatographic separation procedure. It was shown that a characteristic energy quantity (the difference of the adsorption energy of the adsorbed material) can be calculated from each two different migration rates. Separations were made with nitrogen, ethylen, acetylen, carbon dioxide and vinyl chloride, in that small quantities (ca. 1–10 mg) of these substances were passed over an adsorption medium (charcoal, silica gel) with hydrogen as rinsing gas. The determination of the heat conductivity was used as the method of analysis. Plotting the galvanometer deflections of the measuring set-up against time, produces curves, which permit the determination of the above-mentioned energy quantity with an accuracy of 0,02–0,06 kcal/mol. Planimetry of the curves (it is best to use the halfvalue width) gives a measurment of the components of the given gas mixture within about 1%. A mixture of acetylene and ethylene was quantitatively separated in 8 minutes at 30° C.
    Abstract: Résumé On a établi par des hypothèses simplifiées, une formule pour la vitesse de migration des zones, au cours des processus de séparation chromatographique et montré qu'une valeur caractéristique de l'énergie (différence entre l'énergie d'adsorption des substances adsorbées) permettait de calculer deux vitesses différentes de migration. Les séparations furent effectuées avec l'azote, l'éthylène, l'acétylène, le gaz carbonique et le chlorure de vinyle en chassant avec l'hydrogène de petites quantités (environ 1–10 mg) de ces substances sur une couche d'adsorbant (charbon, gel de silice). Comme méthode d'analyse, on a utilisé la détermination de la conductibilité calorifique. En portant les indications du galvanomètre du dispositif de mesure en fonction du temps, on obtient des courbes qui fournissent la détermination de l'énergie caractéristique ci-dessus avec une précision de 0,02 à 0,06 Kcal/Mol. Par projection des courbes sur un plan (au mieux, en utilisant la «largeur de la valeur moyenne», on peut doser des quantités de composants du mélange gazeux donné avec une précision d'environ 1%. Un mélange d'acétylèneéthylène fut quantitativement séparé à 30° en 8 minutes.
    Notes: Zusammenfassung Es wird unter vereinfachenden Annahmen eine Formel für die Wanderungsgeschwindigkeit der Zonen beim chromatographischen Trennverfahren abgeleitet und gezeigt, daß eine charakteristische Energiegröße (die Differenz der Adsorptionsenergie der adsorbierten Stoffe) aus je zwei verschiedenen Wanderungsgeschwindigkeiten berechnet werden kann. Trennungen wurden mit Stickstoff, Äthylen, Acetylen, Kohlendioxyd und Vinylchlorid durchgeführt, indem man kleine Mengen (zirka 1 bis 10 mg) dieser Substanzen mit Wasserstoff als Spülgas über ein Adsorptionsmittel schickte (Kohle, Kieselgel). Als Analysenmethode wurde die Bestimmung der Wärmeleitfähigkeit benutzt. Die Auftragung des Galvanometerausschlages der Meßanordnung gegen die Zeit ergibt Kurven, die die Bestimmung der oben erwähnten Energiegröße mit einer Genauigkeit von 0,02 bis 0,06 kcal/Mol gestatten. Durch Ausplanimetrieren der Kurven (am besten unter Benützung der „Halbwertsbreite“) lassen sich die Mengen der Komponenten der eingegebenen Gasmischung mit einer Genauigkeit von zirka 1% bestimmen. Eine Mischung von Acetylen-Äthylen wurde bei einer Temperatur von 300 in 7 Min. quantitativ getrennt.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1573-0581
    Keywords: Geoid topography ; fracture zone morphology ; satellite altimetry ; transform fault ; plate reconstructions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Geoid data from Geosat and subsatellite basement depth profiles of the Kane Fracture Zone in the central North Atlantic were used to examine the correlation between the short-wavelength geoid (λ=25–100 km) and the uncompensated basement topography. The processing technique we apply allows the stacking of geoid profiles, although each repeat cycle has an unknown long-wavelength bias. We first formed the derivative of individual profiles, stacked up to 22 repeat cycles, and then integrated the average-slope profile to reconstruct the geoid height. The stacked, filtered geoid profiles have a noise level of about 7 mm in geoid height. The subsatellite basement topography was obtained from a recent compilation of structure contours on basement along the entire length of the Kane Fracture Zone. The ratio of geoid height to topography over the Kane Fracture Zone valley decreases from about 20–25 cm km-1 over young ocean crust to 5–0 cm km-1 over ocean crust older than 140 Ma. Both geoid and basement depth of profiles were projected perpendicular to the Kane Fracture Zone, resampled at equal intervals and then cross correlated. The cross correlation shows that the short-wavelength geoid height is well correlated with the basement topography. For 33 of the 37 examined pro-files, the horizontal mismatches are 10 km or less with an average mismatch of about 5 km. This correlation is quite good considering that the average width of the Kane Fracture Zone valley at median depth is 10–15 km. The remaining four profiles either cross the transverse ridge just east of the active Kane transform zone or overlie old crust of the M-anomaly sequence. The mismatch over the transverse ridge probably is related to a crustal density anomaly. The relatively poor correlation of geoid and basement depth in profiles of ocean crust older than 130–140 Ma reflects poor basement-depth control along subsatellite tracks.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 446-451 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  The growth yield coefficients of phenol as well as of chloro- and methyl-substituted derivatives and the respective phenoxyalkanoic acids have been considered in a theoretical study. The yield coefficient of phenol assimilated via the ortho pathway is at a given P/O quotient 9–23% higher than that of the meta route. Chlorine, removed by a reductive mechanism, decreases the yield figure by 10% per chlorine atom; hydrolytic mechanisms are more favourable in this respect. Methylation has a positive effect on the energetics of phenol utilization. Phenoxyacetic acid derivatives have a reduced yield per carbon atom in comparison to the respective phenol derivative. This is compensated for by higher chain lengths of the alkanoic acid moiety. The yield coefficients calculated for phenol correspond to a P/O quotient of 2–3 as compared to the experimental carbon conversion. With chlorinated derivatives, e.g. 2,4-dichlorophenoxyacetic acid or pentachlorophenol, the apparent gain in energy reflects a P/O〈1, indicating uncoupling effects during growth on such compounds.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Applied microbiology and biotechnology 42 (1994), S. 446-451 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The growth yield coefficients of phenol as well as of chloro- and methyl-substituted derivatives and the respective phenoxyalkanoic acids have been considered in a theoretical study. The yield coefficient of phenol assimilated via theortho pathway is at a given P/O quotient 9–23% higher than that of themeta route. Chlorine, removed by a reductive mechanism, decreases the yield figure by 10% per chlorine atom; hydrolytic mechanisms are more favourable in this respect. Methylation has a positive effect on the energetics of phenol utilization. Phenoxyacetic acid derivatives have a reduced yield per carbon atom in comparison to the respective phenol derivative. This is compensated for by higher chain lengths of the alkanoic acid moiety. The yield coefficients calculated for phenol correspond to a P/O quotient of 2–3 as compared to the experimental carbon conversion. With chlorinated derivatives, e.g. 2,4-dichlorophenoxyacetic acid or pentachlorophenol, the apparent gain in energy reflects a P/O 〈 1, indicating uncoupling effects during growth on such compounds.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...