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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 35 (1943), S. 666-672 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 2 (1963), S. 81-89 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 83 (1979), S. 805-810 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 84 (1980), S. 1495-1500 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
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  • 5
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Evidence is presented in support of the hypothesis that stress ethylene formation determines ozone toxicity in plants. In studies with mung beans (Vigna radiata) ozone toxicity was reduced not only when plants had been pretreated with aminoethoxyvinylglycine (AVG) but also after pretreatment of plants with CoCl2 and ascorbic acid. While AVG prevents the enzymatic conversion of S-adenosylmethionine (SAM) to I-aminocyclopropane-I-carboxylic acid (ACC), cobalt and free radical scavengers such as ascorbic acid inhibit the subsequent conversion of ACC to ethylene. Stomatal opening was not affected by pretreatment of plants with inhibitors of ethylene biosynthesis.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 73 (1996), S. 221-236 
    ISSN: 1573-0794
    Keywords: Planet ; Jupiter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In the deep interior of the giant planets Jupiter and Saturn, ordinary hydrogen and helium are transformed into a conducting metallic liquid at extremely high pressure. It is likely that the giant planets' observed magnetic field is constantly generated in the metallic fluid core by magnetohydrodynamic processes, converting mechanic energy in the form of convection into magnetic energy. The maximum strength of their magnetic fields is likely to be limited by magnetic field instabilities which convert the magnetic energy back into convection. The parameter which governs the occurrence of magnetic instabilities is the Elsasser number, λ = B 2Σ/2Ωϱ, where B is the field strength, Σ is the electrical conductivity, Ω is the rotation rate and ϱ is the density. Since magnetic instability will be very active when λ exceeds a critical value λ c ∼ 10 (the precise value depending on the magnetic field distribution), this imposes an upper bound on the effective electrical conductivity of the metallic fluid which comprises the bulk of Jupiter's interior and much of Saturn's. Stability calculations including both toroidal (model) and poloidal (observed) components of the magnetic field in a rapidly rotating spherical shell, have been performed. The most stable configuration of the field is when the poloidal component of field is strong and the toroidal field is weak; in this case we obtain an upper bound for electrical conductivity of Σ ∼ 3 × 106 S/m; while the most unstable configuration of the field is when the toroidal and poloidal fields are comparable, giving rise to Σ m ∼ 3 × 105 S/m. The implications of the results for general dynamo theory are also discussed.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 33 (1983), S. 77-87 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Auf einem Gebäude der Universität Georgia wurden vom 7. Juli 1981 bis 5. Februar 1982 Messungen der Komponenten der Strahlungsbilanz auf einem mit Rasen bewachsenen Flachdach und auf einem Dach mit einer Teer- und Kiesoberfläche durchgeführt. Es wurden die Unterschiede der Strahlungsbilanz, der reflektierten Sonnenstrahlung und der Ausstrahlung zwischen den beiden Oberflächen für als Winter, regnerischer Sommer, trockener Sommer mit Beregnung und Übergangszeit definierte Perioden bestimmt. Die Analyse der Beobachtungswerte hat ergeben, daß die Albedo der Rasendecke um 6% größer war als die der Teer- und Kiesoberfläche und daß die Emmission der Rasendecke ebenfalls um 0,02 bis 0,03 höher war. Die Analyse der Strahlungsbilanz hat ergeben, daß die Teer- und Kiesoberfläche um durchschnittlich 5 bis 6 °C wärmer wird als das rasenbedeckte Dach. Das Überwiegen der Evapotranspiration in der Energiebilanz des Rasens speziell im trockenen Sommer mit Beregnung wurde experimentell bestätigt.
    Notes: Summary Measurements of the radiation balance components for a rooftop lawn and a conventional tar and gravel rooftop surface were made for a building on the University of Georgia campus during the period July 7, 1981 to February 5, 1982. Differences in net radiation, reflected solar radiation and outgoing longwave radiation between the two surfaces were determined for different periods defined as winter, summer rainy, summer dry/irrigated and transition seasons. Data analysis indicated that the lawn's albedo was 6% higher than that for the tar and gravel surface and that the emissivity of the lawn was also 0.02 to 0.03 higher. During the summer dry/irrigated periods, the radiation balance analysis indicated that the conventional tar and gravel surface must have averaged 5 °C to 6 °C warmer than the rooftop lawn. The dominance of evapotranspiration in the lawn energy balance especially during the summer dry/irrigated season was confirmed experimentally.
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 335 (1988), S. 137-141 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Semiconductor devices have been made from polyacetylene, a conjugated polymeric semiconductor. The device operates in a novel way: charge is stored in localized soliton-like excitations of the polymer chain, which are introduced not by doping or photoexcitation but by the presence of a surface ...
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  • 9
    ISSN: 1432-2242
    Keywords: Key words Rice ; Molecular mapping ; Grain quality ; Starch branching enzyme (SBE) ; Amylose extender (ae)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The chromosomal position of Starch Branching Enzyme III (SBEIII) was determined via linkage to RFLP markers on an existing molecular map of rice (Oryza sativa L.). A cDNA of 890 bp was generated using specific PCR primers designed from available SBEIII sequence data and used as a probe in Southern analysis. The SBEIII cDNA hybridized to multiple restriction fragments, but these fragments mapped to a single locus on rice chromosome 2, flanked by CDO718 and RG157. The detection of a multiple-copy hybridization pattern suggested the possibility of a tandemly duplicated gene at this locus. The map location of orthologous SBE genes in maize, wheat, and oat were predicted based on previously published genetic studies and comparative maps of the grass family.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-2242
    Keywords: Key words Apparent amylose ; Microsatellite ; Waxy ; Rice ; RNA splicing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The Waxy gene (Wx) encodes the granule-bound starch synthase responsible for the synthesis of amylose in rice (Oryza sativa). Recently, a polymorphic microsatellite sequence closely linked to the Wx gene was reported. To determine whether polymorphism in this sequence correlates with variation in apparent amylose content, we tested an extended pedigree of 92 current and historically important long-, medium- and short-grain US rice cultivars representing the efforts of many breeders over more than 80 years. Seven Wx microsatellite alleles were identified which together explained 82.9% of the variation in apparent amylose content of the 89 non-glutinous rice cultivars tested. Similar results were also obtained with 101 progenyof a cross between low- and intermediate-amylose breeding lines. An additional, unique microsatelliteallele, (CT)16, was detected in one glutinous cultivar,CI 5309. However, the other glutinous cultivars,Calmochi 101 and Tatsumi mochi, were in the (CT)17 class along with three other cultivars that contained15–16.5% amylose. We sequenced a 200-bp PCR-amplified fragment containing the CT microsatellite and the putative 5′ splice site of the Wx leader intron from a subset of 42 cultivars representing all eight microsatellite alleles. All of the cultivars with 18% or less amylose had the sequence AGTTATA at the putative leader intron 5′ splice site, while all cultivars with a higher proportionof amylose had AGTTATA. This single nucleotidesubstitution could also be assayed by AccI digestion of the amplified fragment. Overall, this single nucleotide polymorphism could explain 79.7% of the variation in the apparent amylose content of the 89 non-glutinous cultivars tested. Interestingly, cultivars in the (CT)19 microsatellite classes that differed substantially in amylose content still showed the correlation between this G-T polymorphism and apparent amylose content. The G-T polymorphism at this site was not, however, able to explain the very low amylose contents of the three glutinous cultivars tested, all of which had the sequence AGTTATA.
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