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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing :
    Keywords: Plant genetics. ; Plant biotechnology. ; Agriculture. ; Plant Genetics. ; Plant Biotechnology. ; Agriculture.
    Description / Table of Contents: Importance of duckweeds in basic research and its industrial applications -- Background history of the international Spirodela genome sequencing initiatives -- Cytogenetics and karyotype evolution of duckweeds -- Duckweed organelle genomes -- Repetitive sequences: Impacts and uses in the Spirodela genome -- Genotyping by sequencing of duckweeds -- Genome and transcriptome of Landoltia punctata -- Transcriptome responses of Spirodela polyrhiza -- Strategies & tools for sequencing duckweeds -- Transformation development in duckweeds.
    Abstract: This book tells the story behind the first Spirodela genome sequencing project. Further, it describes the current genomics applications of these findings, and efforts to sequence new genomes within the family. The closing chapters address the sequencing of the over 1 Gigabase Wolffia genomes, which could have major impacts on genome evolution and agricultural research. The duckweed or Lemnaceae family is a collection of 5 genera and 37 species of the smallest, fastest-growing flowering plants. Many of these aquatic monocotyledonous plants can grow all over the world, in a variety of climates. Given their simplified and neotenous morphology, duckweeds have been researched for several decades as a model species for plant physiology and ecotoxicological research, contributing to our understanding e.g. of flowering response, plant circadian systems, sulfur assimilation pathways and auxin biosynthesis. In addition, duckweed-based treatment has been a favorite and feasible means, especially in developing countries, of removing phosphorus and pharmaceutical chemicals from sewage and wastewater. With a dry annual mass yield per hectare of up to 80 tonnes (equivalent to 10 tonnes of protein), duckweed is also a promising aquatic crop in new modern and sustainable agriculture. Besides being an excellent primary or supplemental feedstock for the production of livestock and fish, duckweed biomass can be utilized as a potential resource for human nutrition, biofuel, or bioplastics, depending on water quality as well as protein or starch accumulating procedures. These academic and commercial interests have led to international efforts to sequence the Spirodela polyrhiza genome, the smallest and most ancient genome in the family.
    Type of Medium: Online Resource
    Pages: XVIII, 185 p. 30 illus., 21 illus. in color. , online resource.
    Edition: 1st ed. 2020.
    ISBN: 9783030110451
    Series Statement: Compendium of Plant Genomes,
    DDC: 581.35
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 109 (1998), S. 1901-1911 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The spectroscopic properties of 4-[2-(4-dimethylaminophenyl)ethenyl]-1-methyl-pyridinium iodide (HR) in different solvents reveal the important effects of solvent dynamics on the spectral broadening and the intramolecular charge transfer of HR. In this article, Raman excitation profiles for 18 vibrational modes of HR are reported in aqueous solution at wavelengths that span the S0→S1 charge transfer transition. The absorption spectra, fluorescence spectra and resonance Raman profiles of HR are modeled using time-dependent wave packet theory and the Brownian oscillator solvent dephasing model. The solvent reorganization energy in the absorption process is much greater than that due to internal vibrational modes, and the solvent reorganization energy for the emission process is considerably smaller than that for the absorption process. The fluorescence spectrum is mainly broadened by the inhomogeneous Gaussian distribution of the electronic energy, perhaps due to internal rotations in the molecule. The results suggest similar polarity of the emission state and the ground state, and strong coupling between the torsional motion and solvent relaxation. The different dependence of the torsional potential on solvent polarity in the S0and S1 state is the cause of different absorption and fluorescence spectral width. In D2O, the absorption cross section of HR is slightly lower, and the absorption and fluorescence spectra are slightly narrower, than in H2O. The smaller absorption spectral linewidth and generally increased Raman cross sections in D2O are accounted for by smaller amplitude of solvent dephasing, perhaps due to the larger inertial moment and stronger hydrogen bonding in D2O compared to H2O. The magnitude and direction of the solvent isotope effect on Raman intensity varies with normal mode, suggesting that the solvent-induced dephasing is mode dependent. Vibrational modes which are strongly coupled to the electronic transition are most sensitive to the solvent isotope. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of theoretical physics 34 (1995), S. 1907-1914 
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An extension of the concept of supersymmetrization is proposed in which the couple of separated second-order differential equations can be fit into a new scheme with existence of a double degeneracy of their eigenspectra. As illustration of the method, some exactly solvable problems related to theU(1, 1) group are discussed explicitly.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of theoretical physics 36 (1997), S. 1465-1474 
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that, starting from an exactly solvable potential and making use of the theory of a system of coupled differential equations, it is possible to construct a new type of second-generation potential which is also exactly solvable.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International journal of theoretical physics 37 (1998), S. 2439-2448 
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that in the case of shapeinvariance, with the use of the mixing functionformalism, exact solvability of the Schrodinger equationcan be obtained without recourse to the technique ofsupersymmetrization. Some consequences of the method are outlinedand illustrated by specific examples.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    International journal of theoretical physics 38 (1999), S. 745-756 
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Starting from an exactly solvable potential, itis shown that it is always possible to construct aninfinite set of higher order generation supersymmetricsystems which are also exactly solvable. A method of deriving these potentials is presented andthe corresponding eigenfunctions and eigenspectra arediscussed. The theory is illustrated with an example inwhich the first- and second-order generation systems are considered.
    Type of Medium: Electronic Resource
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  • 7
    Publication Date: 2017-05-03
    Description: We describe a multiscale model that incorporates force-dependent mechanical plasticity induced by interfiber cross-link breakage and stiffness-dependent cellular contractility to predict focal adhesion (FA) growth and mechanosensing in fibrous extracellular matrices (ECMs). The model predicts that FA size depends on both the stiffness of ECM and the density of ligands available to form adhesions. Although these two quantities are independent in commonly used hydrogels, contractile cells break cross-links in soft fibrous matrices leading to recruitment of fibers, which increases the ligand density in the vicinity of cells. Consequently, although the size of focal adhesions increases with ECM stiffness in nonfibrous and elastic hydrogels, plasticity of fibrous networks leads to a departure from the well-described positive correlation between stiffness and FA size. We predict a phase diagram that describes nonmonotonic behavior of FA in the space spanned by ECM stiffness and recruitment index, which describes the ability of cells to break cross-links and recruit fibers. The predicted decrease in FA size with increasing ECM stiffness is in excellent agreement with recent observations of cell spreading on electrospun fiber networks with tunable cross-link strengths and mechanics. Our model provides a framework to analyze cell mechanosensing in nonlinear and inelastic ECMs.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 8
    Publication Date: 2018-03-22
    Print ISSN: 0944-1344
    Electronic ISSN: 1614-7499
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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  • 9
    Publication Date: 2016-07-19
    Description: Disperse fine equiaxed α-Al 2 O 3 nanoparticles with a mean particle size of 9 nm and a narrow size distribution of 2–27 nm were synthesized using α-Fe 2 O 3 as seeds and isolation via homogeneous precipitation-calcination-selective corrosion processing. The presence of α-Fe 2 O 3 acting as seeds and isolation phase can reduce the formation temperature to 700°C and prevent agglomeration and growth of α-Al 2 O 3 nanoparticles, resulting in disperse fine equiaxed α-Al 2 O 3 nanoparticles. These α-Al 2 O 3 nanoparticles were pressed into green compacts at 500 MPa and sintered first by normal sintering to study their sintering behavior and finally by two-step sintering (heated to 1175°C without hold and decreased to 1025°C with a 20 h hold in air) to obtain nanocrystalline α-Al 2 O 3 ceramics. The two-step sintered bodies are nanocrystalline α-Al 2 O 3 with an average grain size of 55 nm and a relative density of 99.6%. The almost fully dense nanocrystalline α-Al 2 O 3 ceramic with finest grains achieved so far by pressureless sintering reveals that these α-Al 2 O 3 nanoparticles have an excellent sintering activity.
    Print ISSN: 0002-7820
    Electronic ISSN: 1551-2916
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Wiley
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  • 10
    Publication Date: 1998-08-01
    Print ISSN: 0021-9606
    Electronic ISSN: 1089-7690
    Topics: Chemistry and Pharmacology , Physics
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