Directional Asymmetry
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Constant fluctuating asymmetry but not directional asymmetry along the geographic distribution of Drosophila antonietae (Diptera, Drosophilidae)
ABSTRACT The population dynamics of a species tends to change from the core to the periphery of its distribution. Therefore, one could expect peripheral populations to be subject to a higher level of stress than more central populations (the center–periphery hypothesis) and consequently should present a higher level of fluctuating asymmetry. To test these
Rev. Bras. entomol.. Publicado em: 2015-12
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2. Broiler walking ability and toe asymmetry under harsh rearing conditions
Morphological asymmetry has been described as a potential broiler welfare indicator, for interpreting the birds' ability to cope with the challenges that may affect its growth. The objective of this study was to evaluate the use of morphological asymmetry data to estimate broiler walking ability and welfare.dBroilers werefed diets supplemented or not with vi
Rev. Bras. Cienc. Avic.. Publicado em: 2012-09
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3. Ontogenia e assimetria craniana do boto-cinza, Sotalia guianensis(Cetacea: Delphinidae) / Ontogeny and asymmetry of estuarine dolphin skull, Sotalia guianensis (Cetacea: Delphinidae)
Vários estudos sobre ontogenia e assimetria foram e vêm sendo realizados com cetáceos odontocetos através da utilização da morfometria convencional. Frequentemente compara-se o tamanho de estruturas do sistema respiratório de ambos os lados do crânio para avaliar a assimetria de tamanho e analisa-se o aumento de tamanho do corpo com a idade para aval
Publicado em: 2010
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4. Estudo do desempenho de acoplador direcional não linear duplo assimétrico de fibras ópticas operando portas lógicas. / Study of the performance of assymmetrical two-core non linear directional fiber coupler operating logic gates
We investigate the performance of three different non linear directional assymmetrical fibers couplers that include a profile of self-modulation of increasing and decreasing phase. The asymmetry is associated with the profile of self-modulation of phase of one of the chanels. Initially, we investigate the performance of the considered coupler using ultrashor
Publicado em: 2006
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5. Microphase separation of diblock copolymer with moving walls
Diblock copolymers are linear chain molecules consisting of two subchains A and B grafted covalently to each other. Below some critical temperature Tc these two blocks tend to segregate, but due to the covalent bond they can segregate at best locally to form periodic structures (microdomains). For molecules whose subchains have the same length, the equilibri
Brazilian Journal of Physics. Publicado em: 2004-06
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6. From symmetry to asymmetry: Phylogenetic patterns of asymmetry variation in animals and their evolutionary significance
Phylogenetic analyses of asymmetry variation offer a powerful tool for exploring the interplay between ontogeny and evolution because (i) conspicuous asymmetries exist in many higher metazoans with widely varying modes of development, (ii) patterns of bilateral variation within species may identify genetically and environmentally triggered asymmetries,
The National Academy of Sciences of the USA.
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7. Directional and fluctuating asymmetry in finger and a-b ridge counts in psychosis: a case-control study
BioMed Central.
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8. Effects of strand and directional asymmetry on base–base coupling and charge transfer in double-helical DNA
Mechanistic models of charge transfer (CT) in macromolecules often focus on CT energetics and distance as the chief parameters governing CT rates and efficiencies. However, in DNA, features unique to the DNA molecule, in particular, the structure and dynamics of the DNA base stack, also have a dramatic impact on CT. Here we probe the influence of subtle stru
National Academy of Sciences.
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9. A transcriptional regulatory cascade that controls left/right asymmetry in chemosensory neurons of C. elegans
The molecular mechanisms of differential pattern formation along the left/right (L/R) axis in the nervous system are poorly understood. The nervous system of the nematode Caenorhabditis elegans displays several examples of L/R asymmetry, including the directional asymmetry displayed by the two ASE taste receptor neurons, ASE left (ASEL) and ASE right (AS
Cold Spring Harbor Laboratory Press.
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10. Arabidopsis thaliana sku mutant seedlings show exaggerated surface-dependent alteration in root growth vector.
Roots of wild-type Arabidopsis thaliana seedlings in the Wassilewskija (WS) and Landsberg erecta (Ler) ecotypes often grow aslant on vertical agar surfaces. Slanted root growth always occurs to the right of the gravity vector when the root is viewed through the agar surface, and is not observed in the Columbia ecotype. Right-slanted root growth is surface-de
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11. Sigma factors, asymmetry, and the determination of cell fate in Bacillus subtilis.
Soon after the initiation of sporulation, Bacillus subtilis divides asymmetrically to produce sister cells that have very different developmental fates. Recently, it has been proposed that the differential gene expression which begins soon after this division is due to cell-specific activation of the transcription factors sigma F and sigma E in the prespore
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12. The effects of the "vestibular sedative" drug, Flunarizine upon the vestibular and oculomotor systems.
The effects of the "vestibular sedative" drug Flunarizine upon the oculomotor functions of pursuit and voluntary saccades and upon the vestibular response (to rotational stimuli) were assessed in twenty volunteer subjects. The study was then extended to three patients with chronic imbalance of central origin who had reported a beneficial symptomatic response