1,826 results found
    1. Plant Biology

    Testing the Münch hypothesis of long distance phloem transport in plants

    Michael Knoblauch et al.
    Measurements of physiological and geometrical parameters of the sieve tube system in Ipomoea nil provide strong support for pressure driven mass flow.
    1. Computational and Systems Biology
    2. Chromosomes and Gene Expression

    Stochastic modelling, Bayesian inference, and new in vivo measurements elucidate the debated mtDNA bottleneck mechanism

    Iain G Johnston et al.
    New modelling, statistics, and experiments show that cellular populations of mitochondrial DNA (mtDNA) evolve during development according to solvable stochastic dynamics involving binomial partitioning and random turnover, facilitating a predictive and quantitative theory of the mtDNA bottleneck.
    1. Neuroscience

    Dopaminergic and opioidergic regulation during anticipation and consumption of social and nonsocial rewards

    Sebastian Korb et al.
    Administration of dopamine and opioid receptor antagonists resulted in reduced reward anticipation (effort and increased negative facial reactions), but only administration of opioid antagonists resulted in reduced liking (facial reactions).
    1. Neuroscience

    Biophysics of object segmentation in a collision-detecting neuron

    Richard Burkett Dewell, Fabrizio Gabbiani
    Active dendritic processing enables an individual neuron to discriminate the spatial pattern of synaptic inputs, increasing neural and behavioral selectivity for escaping an impending threat.
    1. Medicine

    Cardiovascular adaptation to hypoxia and the role of peripheral resistance

    Andrew S Cowburn et al.
    Radiotelemetric and genetic studies of peripheral tissue response show that a peripheral tissue can dynamically alter cardiovascular adaptation to changes in environmental oxygen.
    1. Ecology

    Transcriptome analysis illuminates the nature of the intracellular interaction in a vertebrate-algal symbiosis

    John A Burns et al.
    The endosymbiosis between an alga and the spotted salamander shows several parallels to invertebrate-algal symbioses as well as to pathogen associations in vertebrate animals.
    1. Neuroscience

    Neural effects of propofol-induced unconsciousness and its reversal using thalamic stimulation

    André M Bastos et al.
    Understanding how general anesthesia changes neural dynamics in the cortex and thalamus can lead to its safer use and shed light on the nature of consciousness.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Mutations that improve efficiency of a weak-link enzyme are rare compared to adaptive mutations elsewhere in the genome

    Andrew B Morgenthaler et al.
    Mutations elsewhere in the genome play critical roles in improving fitness during amplification and divergence of a gene encoding a weak-link enzyme whose inefficiency limits growth rate.
    1. Ecology

    Biophysical and physiological processes causing oxygen loss from coral reefs

    Cynthia B Silveira et al.
    Coral reef heterotrophic bacteria and fleshy macroalgae cause oxygen loss from reef systems through microbial biomass accumulation and ebullition from algae surfaces.
    1. Genetics and Genomics

    Quiescence unveils a novel mutational force in fission yeast

    Serge Gangloff et al.
    The quiescence-driven mutational landscape reveals replication-independent mutagenesis as a novel evolutionary force.

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