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
  • 1
    Publication Date: 2018-05-18
    Description: Thermoelectric technology enables the harvest of waste heat and its direct conversion into electricity. The conversion efficiency is determined by the materials figure of merit ZT . Here we show a maximum ZT of ~2.8 ± 0.5 at 773 kelvin in n-type tin selenide (SnSe) crystals out of plane. The thermal conductivity in layered SnSe crystals is the lowest in the out-of-plane direction [two-dimensional (2D) phonon transport]. We doped SnSe with bromine to make n-type SnSe crystals with the overlapping interlayer charge density (3D charge transport). A continuous phase transition increases the symmetry and diverges two converged conduction bands. These two factors improve carrier mobility, while preserving a large Seebeck coefficient. Our findings can be applied in 2D layered materials and provide a new strategy to enhance out-of-plane electrical transport properties without degrading thermal properties.
    Keywords: Physics, Applied, Materials Science
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2006
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Geodesy ; Earthquake ; China ; Inversion ; Fracture ; Source ; GRL ; 1734 ; History ; of ; Geophysics: ; Seismology ; 1744 ; Tectonophysics ; 8004 ; Structural ; Geology: ; Dynamics ; and ; mechanics ; of ; faulting ; (8118) ; 8123 ; Tectonophysics: ; Dynamics: ; seismotectonics ; 8175 ; Tectonics ; and ; landscape ; evolution
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2015-09-26
    Description: Rogue waves are unexpectedly large and localized displacements from an equilibrium position or an otherwise calm background. For the nonlinear Schrödinger (NLS) model widely used in fluid mechanics and optics, these waves can occur only when dispersion and nonlinearity are of the same sign, a regime of modulation instability. For coupled NLS equations, rogue waves will arise even if dispersion and nonlinearity are of opposite signs in each component as new regimes of modulation instability will appear in the coupled system. The same phenomenon will be demonstrated here for a coupled “ AB ” system, a wave-current interaction model describing baroclinic instability processes in geophysical flows. Indeed, the onset of modulation instability correlates precisely with the existence criterion for rogue waves for this system. Transitions from “elevation” rogue waves to “depression” rogue waves are elucidated analytically. The dispersion relation as a polynomial of the fourth order may possess double pairs of complex roots, leading to multiple configurations of rogue waves for a given set of input parameters. For special parameter regimes, the dispersion relation reduces to a cubic polynomial, allowing the existence criterion for rogue waves to be computed explicitly. Numerical tests correlating modulation instability and evolution of rogue waves were conducted.
    Print ISSN: 1054-1500
    Electronic ISSN: 1089-7682
    Topics: Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2018
    Description: Abstract Sustainable management of agricultural land requires not only an accurate assessment of the biophysical status of the soil but also estimates of the social and economic aspects of the soil. This paper focuses on soil security mapping of an approximately 80 000 km2 agricultural area in middle‐eastern China. We examined a digital soil assessment framework in mapping soil security and its five dimensions (capability, condition, capital, connectivity and codification) using digital soil maps and environmental variables. The main objective is to improve the understanding of soil protection in agricultural practices. Soil and environmental variables were coded as indicator values based on their functions, and three averaging models were used to integrate the indicators for soil security mapping. Results show that agricultural land in the study area currently has a high potential to achieve the crop production function, while there is still lack of sufficient social connectivity. Most of agricultural land has been properly protected by the public policy. More than half of the agricultural land has high security for cropping, while there is no unsecured soil. In general, most of the agricultural lands have already been well developed for cropping. The low soil security mainly contributes to the lack of proper connection to the soil. The findings suggest that digital soil security assessment is highly recommended for guiding sustainable development of agricultural land, because it could provide the knowledge of factors affecting soil security from complex multifaceted dimensions, and potential solutions to make agriculture soil more secure.
    Print ISSN: 0266-0032
    Electronic ISSN: 1475-2743
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    facet.materialart.
    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1991-06-14
    Description: Voltage-clamp analysis of Drosophila larval muscle revealed that ether a go-go (eag) mutations affected all identified potassium currents, including those specifically eliminated by mutations in the Shaker or slowpoke gene. Together with DNA sequence analysis, the results suggest that the eag locus encodes a subunit common to different potassium channels. Thus, combinatorial assembly of polypeptides from different genes may contribute to potassium channel diversity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhong, Y -- Wu, C F -- New York, N.Y. -- Science. 1991 Jun 14;252(5012):1562-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Iowa, Iowa City 52242.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2047864" target="_blank"〉PubMed〈/a〉
    Keywords: 4-Aminopyridine/pharmacology ; Animals ; Calcium/pharmacology ; Chromosome Mapping ; Drosophila/*genetics/physiology ; Electric Stimulation ; Kinetics ; Larva ; Membrane Potentials/drug effects ; Muscles/*physiology ; *Mutation ; Potassium Channels/drug effects/genetics/*physiology ; Quinidine/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    facet.materialart.
    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1991-01-11
    Description: Synaptic transmission was examined in Drosophila mutants deficient in memory function. These mutants, dunce and rutabaga, are defective in different steps of the cyclic adenosine 3',5'-monophosphate (cAMP) cascade. In both dunce and rutabaga larvae, voltage-clamp analysis of neuromuscular transmission revealed impaired synaptic facilitation and post-tetanic potentiation as well as abnormal responses to direct application of dibutyryl cAMP. In addition, the calcium dependence of transmitter release was shifted in dunce. The results suggest that the cAMP cascade plays a role in synaptic facilitation and potentiation and indicate that synaptic plasticity is altered in Drosophila memory mutants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhong, Y -- Wu, C F -- New York, N.Y. -- Science. 1991 Jan 11;251(4990):198-201.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Iowa, Iowa City 52242.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1670967" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Bucladesine/pharmacology ; Calcium/pharmacology ; Cyclic AMP/*physiology ; Drosophila/*genetics ; Electric Stimulation ; Larva/physiology ; Memory/physiology ; Muscle Contraction/physiology ; Mutation ; Neuromuscular Junction/physiology ; Neuronal Plasticity/*physiology ; Neurotransmitter Agents/secretion ; Synapses/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 1983-06-03
    Description: Electrophysiological analysis of the Drosophila behavioral mutants Eag and Sh and the double mutant Eag Sh indicates that the products of both genes take part in the control of potassium currents in the membranes of both nerve and muscle. In voltage-clamped larval muscle fibers, Sh affects the transient A current, whereas Eag reduces the delayed rectification and, to a lesser extent, the A current.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, C F -- Ganetzky, B -- Haugland, F N -- Liu, A X -- NS00675/NS/NINDS NIH HHS/ -- NS15797/NS/NINDS NIH HHS/ -- NS18500/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 Jun 3;220(4601):1076-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6302847" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Drosophila/genetics ; Electrophysiology ; Genes ; Ion Channels/*metabolism ; Larva ; Membrane Potentials ; Muscles/metabolism ; *Mutation ; Neuromuscular Junction/metabolism ; Potassium/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Organophosphorus hydrolase (OPH) is capable of degrading a variety of pesticides and nerve agents. We have developed a versatile monitoring technique for detecting the amount of OPH during the expression and purification steps. This involves fusion of the gene for green fluorescent protein (GFP) to the 5′ end of the OPH gene and subsequent expression in Escherichia coli. The synthesized fusion protein was directly visualized due to the optical properties of GFP. Western blot analyses showed that the correct fusion protein was expressed after IPTG-induction. Also, the in vivo GFP fluorescence intensity was proportional to the OPH enzyme activity. Moreover, the OPH, which forms a dimer in its active state, retained activity while fused to GFP. Enterokinase digestion experiments showed that OPH was separated from the GFP reporter after purification via immobilized metal affinity chromatography, which in turn was monitored by fluorescence. The strategy of linking GFP to OPH has enormous potential for improving enzyme production efficiency, as well as enhancing field use, as it can be monitored at low concentrations with inexpensive instrumentation based on detecting green fluorescence.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 28 (1985), S. 1692-1694 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    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...