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 Towards a state-space geometry of neural responses to natural scenes: A steady-state approach. Publication
ID31325643Published Date2019-11-01JournalNeuroImage, 2019-11-01, Volume 201
Our understanding of information processing by the mammalian visual system has come through a variety of techniques ranging from psychophysics and fMRI to single unit recording and EEG. Each technique provides unique insights into the processing framework of the early visual system. Here, we focus on the nature of the information that is carried by steady state visual evoked potentials (SSVEPs). To study the information provided by SSVEPs, we presented human participants with a population of …
 Dehydroalkylative Activation of CNN- and PNN-Pincer Ruthenium Catalysts for Ester Hydrogenation. Publication
ID31589441Published Date2019-10-30JournalJournal of the American Chemical Society, 2019-10-30, Volume 141
Ruthenium-pincer complexes bearing CNN- and PNN-pincer ligands with diethyl- or diisopropylamino side groups, which have previously been reported to be active precatalysts for ester hydrogenation, undergo dehydroalkylation on heating in the presence of tricyclohexylphosphine to release ethane or propane, giving five-coordinate ruthenium(0) complexes containing a nascent imine functional group. Ethane or propane is also released under the conditions of catalytic ester hydrogenation, and time-c…
 Hymenasplenium volubile: documentation of its gametophytes and the first record of a hemiepiphyte in the Aspleniaceae. Publication
ID31630154Published Date2019-10-20JournalAnnals of botany, 2019-10-20
Through careful field examination of the growth habit of the gametophytes and sporophytes of Hymenasplenium volubile across an ontogenetic series, we aim to understand better the evolution of epiphytism in this poorly understood group of ferns.We made field observations of H. volubile sporophytes and gametophytes, and brought specimens back to the lab for microscopic analysis. In the field, sporophytes at each ontogenetic stage were photographed to document the species' growth habit. We used …
 Post-feeding behavior in crayfish (Procambarus clarkii): description of an invertebrate behavioral satiety sequence. Publication
ID31639378Published Date2019-10-19JournalPhysiology & behavior, 2019-10-19
Previous studies have demonstrated that food consumption induces the behavioral satiety sequence (BSS) in some animals, a characteristic series of activities which include exploration, grooming, and resting. The BSS, while valuable in assessing the effects of drugs on food intake, has not been widely studied in non-mammalian species. Our experiment examined post-feeding behavior in crayfish using continuous recording of five behaviors: feeding, walking, grooming, leg wave, and quiescence. We …
 METHOD TO DETERMINE THE TOPOLOGICAL CHARGE OF AN OPTICAL BEAM Patent
Publication NumberUS 20190310484Filing StatusPatent ApplicationAvailabilityUnknownFiling Date2019-04-03Publication Date2019-10-10
An apparatus for determining a topological charge of one of more optical beams. For single beams, a trapezoidal optical element having a front face and an opposing rear face that is not parallel to the front face is oriented so that the optical beam is reflected in a direction other than along the optical path. The reflection of the optical beam by the trapezoidal optical element produces an interference pattern that can be captured by an optical imager and that can be decoded to determine th…
 Beyond the Powerhouse: Integrating Mitonuclear Evolution, Physiology, and Theory in Comparative Biology. Publication
ID31504533Published Date2019-10-01JournalIntegrative and comparative biology, 2019-10-01, Volume 59
Eukaryotes are the outcome of an ancient symbiosis and as such, eukaryotic cells fundamentally possess two genomes. As a consequence, gene products encoded by both nuclear and mitochondrial genomes must interact in an intimate and precise fashion to enable aerobic respiration in eukaryotes. This genomic architecture of eukaryotes is proposed to necessitate perpetual coevolution between the nuclear and mitochondrial genomes to maintain coadaptation, but the presence of two genomes also creates…
 Does Cellular Metabolism from Primary Fibroblasts and Oxidative Stress in Blood Differ between Mammals and Birds? The (Lack-thereof) Scaling of Oxidative Stress. Publication
ID30924869Published Date2019-10-01JournalIntegrative and comparative biology, 2019-10-01, Volume 59
As part of mitonuclear communication, retrograde and anterograde signaling helps maintain homeostasis under basal conditions. Basal conditions, however, vary across phylogeny. At the cell-level, some mitonuclear retrograde responses can be quantified by measuring the constitutive components of oxidative stress, the balance between reactive oxygen species (ROS) and antioxidants. ROS are metabolic by-products produced by the mitochondria that can damage macromolecules by structurally altering p…
 Muscle myonuclear domain, but not oxidative stress, decreases with age in a long-lived seabird with high activity costs. Publication
ID31488626Published Date2019-09-19JournalThe Journal of experimental biology, 2019-09-19, Volume 222
In birds, many physiological parameters appear to remain constant with increasing age, showing no deterioration until 'catastrophic' mortality sets in. Given their high whole-organism metabolic rate and the importance of flight in foraging and predator avoidance, flight muscle deterioration and accumulated oxidative stress and tissue deterioration may be an important contributor to physiological senescence in wild birds. As a by-product of aerobic respiration, reactive oxygen species are prod…
 Temporal shifts in iso/anisohydry revealed from daily observations of plant water potential in a dominant desert shrub. Publication
ID31519032Published Date2019-09-13JournalThe New phytologist, 2019-09-13
Plant species are characterized along a spectrum of isohydry to anisohydry depending on their regulation of water potential (Ψ), but the plasticity of hydraulic strategies is largely unknown. The role of environmental drivers was evaluated in the hydraulic behavior of Larrea tridentata, a drought-tolerant desert shrub that withstands a wide range of environmental conditions. With a 1.5 yr time-series of 2324 in situ measurements of daily predawn and midday Ψ, the temporal variability of hydra…
 A Search for Spatially Resolved Infrared Ro-Vibrational Molecular Hydrogen Emission from the Disks of Young Stars Publication
IDarXiv:1909.04730Published Date2019-09-10
We present results from a survey searching for spatially resolved near-infrared line emission from molecular hydrogen gas in the circumstellar environments of nine young stars: AA Tau, AB Aur, DoAr 21, GG Tau, GM Aur, LkCa 15, LkH$\alpha$ 264, UY Aur, and V773 Tau. Prior high-resolution spectra of these stars showed the presence of ro-vibrational H$_2$ line emission at 2.12$\mu$m with characteristics more typical of gas located in proto-planetary disks rather than outflows. In this study, we …
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