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  • General relativity, alternative theories of gravity  (4)
  • Protein-nucleic acid interaction  (2)
  • Apis mellifera  (1)
  • Kerala  (1)
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Keywords
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Years
  • 1
    Electronic Resource
    Electronic Resource
    Influence of resistant honey bee hosts on the life history of the parasite Acarapis woodi (1996)
    Springer
    Experimental and applied acarology 20 (1996), S. 313-322 
    Details
    ISSN: 1572-9702
    Keywords: Apis mellifera ; Acarapis woodi ; resistance ; honey bee ; tracheal mite ; bioassay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Non-infested, young adult honey bees (Apis mellifera L.) of two stocks were exposed to tracheal mites (Acarapis woodi (Rennie)) in infested colonies to determine how divergent levels of susceptibility in host bees differentially affect components of the mite life history. Test bees were retrieved after exposure and dissected to determine whether resistance is founded on the reduced success of gravid female (foundress) mites to enter the host tracheae, on the suppressed reproduction by foundress mites once established in host tracheae or on both. Cohorts of 30–60 bees from each of ten resistant colonies and eight susceptible colonies were tested in eight trials (three to five colonies per stock per trial) having exposure durations of 4, 9 or 21 days. The principal results were that lower percentages of resistant bees than of susceptible bees routinely became infested by foundress mites, individual infested susceptible bees often had more foundress mites than individual infested resistant bees did and mite fecundity was similar in both host types. The infestation percentage results corresponded well with similar results from a prior field test of these stocks and, thus, suggest that the bioassay is useful for assessing honey bee resistance to A. woodi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00052961
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Traditional homegardens of Kerala: a sustainable human ecosystem (1993)
    Springer
    Agroforestry systems 24 (1993), S. 203-213 
    Details
    ISSN: 1572-9680
    Keywords: Kerala ; homegardens ; agroforestry ; low input agriculture ; sustainability ; architectural analysis ; human ecosystem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An analogue approach to analysing the traditional homegardens of Keralavis-à-vis natural climax ecosystems is adopted. The traditional homegarden is apparently a climax ecosystem, where ecological succession is consciously manipulated by human beings. High intensity of vertical and horizontal space use, the highly dynamic chronological structure and the capacity to perform essential ecological processes make this ecosystem relatively sustainable. Homegardens in Kerala effectively serve as human ecosystems with their low input demand, staggered supply of outputs, and enhancement of habitat quality. However, recent trends in agrarian structure and the high market orientation exert pressures on the homegarden, and its sustainability as a human ecosystem is in question.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00706892
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    Paper (German National Licenses)
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  • 3
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    Relativistic polytropic spheres with electric charge: Compact stars, compactness and mass bounds, and quasiblack hole configurations (2018)
    American Physical Society (APS)
    Details
    Publication Date: 2018-05-26
    Description: Author(s): José D. V. Arbañil and Vilson T. Zanchin We study the static equilibrium configurations of uncharged and charged spheres composed by a relativistic polytropic fluid, and we compare with those of spheres composed by a nonrelativistic polytropic fluid, the later case being already studied in a previous work [J. D. Arbañil, P. S. Lemos, and V... [Phys. Rev. D 97, 104045] Published Fri May 25, 2018
    Keywords: General relativity, alternative theories of gravity
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Causality in 3D massive gravity theories (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-05-13
    Description: Author(s): José D. Edelstein, Gaston Giribet, Carolina Gómez, Ercan Kilicarslan, Matías Leoni, and Bayram Tekin We study the constraints coming from the local causality requirement in various 2 + 1 dimensional dynamical theories of gravity. In topologically massive gravity, with a single parity noninvariant massive degree of freedom, and in new massive gravity, with two massive spin-2 degrees of freedom, causal… [Phys. Rev. D 95, 104016] Published Fri May 12, 2017
    Keywords: General relativity, alternative theories of gravity
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Geodesic motion in a stationary dihole spacetime (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-08-30
    Description: Author(s): F. L. Dubeibe and José D. Sanabria-Gómez The knowledge of the properties of the different exact solutions modeling binary systems is a necessary step toward the classification of physically suitable solutions and its corresponding limits of applicability. In the present paper, we perform an analysis of the geodesics around two counter-rota… [Phys. Rev. D 94, 044058] Published Mon Aug 29, 2016
    Keywords: General relativity, alternative theories of gravity
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    Compact stars in the braneworld: A new branch of stellar configurations with arbitrarily large mass (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-03-16
    Description: Author(s): Germán Lugones and José D. V. Arbañil We study the properties of compact stars in the Randall-Sundrum type-II braneworld (BW) model. To this end, we solve the braneworld generalization of the stellar structure equations for a static fluid distribution with spherical symmetry considering that the spacetime outside the star is described b… [Phys. Rev. D 95, 064022] Published Tue Mar 14, 2017
    Keywords: General relativity, alternative theories of gravity
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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  • 7
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    Mapping the interactions of the single-stranded DNA binding protein of bacteriophage T4 (gp32) with DNA lattices at single nucleotide resolution: polynucleotide binding and cooperativity (2015)
    Oxford University Press
    Details
    Publication Date: 2015-10-31
    Description: We here use our site-specific base analog mapping approach to study the interactions and binding equilibria of cooperatively-bound clusters of the single-stranded DNA binding protein (gp32) of the T4 DNA replication complex with longer ssDNA (and dsDNA) lattices. We show that in cooperatively bound clusters the binding free energy appears to be equi-partitioned between the gp32 monomers of the cluster, so that all bind to the ssDNA lattice with comparable affinity, but also that the outer domains of the gp32 monomers at the ends of the cluster can fluctuate on and off the lattice and that the clusters of gp32 monomers can slide along the ssDNA. We also show that at very low binding densities gp32 monomers bind to the ssDNA lattice at random, but that cooperatively bound gp32 clusters bind preferentially at the 5'-end of the ssDNA lattice. We use these results and the gp32 monomer-binding results of the companion paper to propose a detailed model for how gp32 might bind to and interact with ssDNA lattices in its various binding modes, and also consider how these clusters might interact with other components of the T4 DNA replication complex.
    Keywords: Protein-nucleic acid interaction
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 8
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    Mapping the interactions of the single-stranded DNA binding protein of bacteriophage T4 (gp32) with DNA lattices at single nucleotide resolution: gp32 monomer binding (2015)
    Oxford University Press
    Details
    Publication Date: 2015-10-31
    Description: Combining biophysical measurements on T4 bacteriophage replication complexes with detailed structural information can illuminate the molecular mechanisms of these ‘macromolecular machines’. Here we use the low energy circular dichroism (CD) and fluorescent properties of site-specifically introduced base analogues to map and quantify the equilibrium binding interactions of short (8 nts) ssDNA oligomers with gp32 monomers at single nucleotide resolution. We show that single gp32 molecules interact most directly and specifically near the 3'-end of these ssDNA oligomers, thus defining the polarity of gp32 binding with respect to the ssDNA lattice, and that only 2–3 nts are directly involved in this tight binding interaction. The loss of exciton coupling in the CD spectra of dimer 2-AP (2-aminopurine) probes at various positions in the ssDNA constructs, together with increases in fluorescence intensity, suggest that gp32 binding directly extends the sugar-phosphate backbone of this ssDNA oligomer, particularly at the 3'-end and facilitates base unstacking along the entire 8-mer lattice. These results provide a model (and ‘DNA map’) for the isolated gp32 binding to ssDNA targets, which serves as the nucleation step for the cooperative binding that occurs at transiently exposed ssDNA sequences within the functioning T4 DNA replication complex.
    Keywords: Protein-nucleic acid interaction
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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