626 results match your criteria: "Bowdoin College[Affiliation]"

Arabidopsis WALL-ASSOCIATED KINASES are not required for oligogalacturonide-induced signaling and immunity.

Plant Cell

December 2024

Institute of Plant and Microbial Biology and Zürich-Basel Plant Science Center, University of Zürich, Zürich 8008, Switzerland.

Carbohydrate-based cell wall signaling impacts plant growth, development, and stress responses; however, how cell wall signals are perceived and transduced remains poorly understood. Several cell wall breakdown products have been described as typical damage-associated molecular patterns that activate plant immunity, including pectin-derived oligogalacturonides (OGs). Receptor kinases of the WALL-ASSOCIATED KINASE (WAK) family bind pectin and OGs and were previously proposed as OG receptors.

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The evolution of mating systems reflects a balance of the often-conflicting interests of males and females. Polygyny, a mating system in which males have multiple mates, presents a fitness benefit to males, but the consequences for females are less clear. Females with polygynous social mates may suffer reduced fitness, especially secondary females who typically receive less male support.

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A new diagnosis of type 1 diabetes (T1D) may be accompanied by numerous lifelong financial, emotional, and physical challenges, thus advancements in therapies that can delay the onset of clinical disease are crucial. T1D is an autoimmune condition involving destruction of pancreatic beta cells leading to insulin deficiency, hyperglycemia, and long-term insulin dependence. The pathogenesis of T1D is classified into stages, with the first signal being the detection of autoantibodies without any glycemic changes.

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22 and 50 kHz rat ultrasonic vocalization playback reveals sex differences in behavior and cFos in brain regions associated with affective processing.

Behav Brain Res

February 2025

Research in Affective and Translational Neuroscience Laboratory, Department of Psychology and Program in Neuroscience, Bowdoin College, Brunswick, ME 04011 USA, USA. Electronic address:

Adult rats communicate using ultrasonic vocalization (USV) frequencies indicating negative (22 kHz) or positive (50 kHz) affective states. Playback of USVs can serve as an ethologically translational method to study affective processing in response to socially communicated states. However, few studies have examined behavioral and neural effects of USV playback in both male and female rats.

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Little is known about ionic liquids as MOF crystallization additives. We investigate the role of 1-methyl-3-octylimidazolium chloride (OmimCl) in MIL-53(Al) hydrothermal synthesis. Higher crystallinities and particle sizes with 0.

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Several recent high intensity ENSO events have caused strong negative impacts on the adult phases of foundational species in coral reef ecosystems, but comparatively little is known about how climatic variables related to recent ENSOs are impacting the supply of larvae to benthic populations. In marine fishes and invertebrates, reproductive adults and planktonic larvae are generally more sensitive to environmental variability than older, non-reproductive adults. Further, the transport of larvae in ocean currents may also be strongly ENSO dependent.

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Article Synopsis
  • Scholars are concerned that deep partisan divides among the public pose a risk to American democracy.
  • A large study with over 32,000 participants tested 25 different strategies aimed at decreasing partisan animosity and support for undemocratic practices.
  • Results showed that highlighting relatable individuals with differing beliefs and emphasizing shared identities were effective at reducing animosity, while correcting misunderstandings about rival views helped lessen support for undemocratic actions.
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Planting diverse forests has been proposed as a means to increase long-term carbon (C) sequestration while providing many co-benefits. Positive tree diversity-productivity relationships are well established, suggesting more diverse forests will lead to greater aboveground C sequestration. However, the effects of tree diversity on belowground C storage have the potential to either complement or offset aboveground gains, especially during early stages of afforestation when potential exists for large losses in soil C due to soil decomposition.

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Despite decades of preclinical investigation, there remains limited understanding of the etiology and biological underpinnings of anxiety disorders. Sensitivity to potential threat is characteristic of anxiety-like behavior in humans and rodents, but traditional rodent behavioral tasks aimed to assess threat responsiveness lack translational value, especially with regard to emotionally valenced stimuli. Therefore, development of novel preclinical approaches to serve as analogues to patient assessments is needed.

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Temporal Refraction in an Acoustic Phononic Lattice.

Phys Rev Lett

August 2024

Department of Mechanical and Civil Engineering, California Institute of Technology, Pasadena, California 91125, USA.

In this Letter, we present the first experimental demonstration of the temporal refraction of acoustic waves in a phononic lattice. A step change in grounding stiffness results in a discontinuous change in group velocity across a so-called temporal boundary. This leads to frequency translation of incident signals, which maintain constant wavelength.

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The seasonal timing and magnitude of photosynthesis in evergreen needleleaf forests (ENFs) has major implications for the carbon cycle and is increasingly sensitive to changing climate. Earlier spring photosynthesis can increase carbon uptake over the growing season or cause early water reserve depletion that leads to premature cessation and increased carbon loss. Determining the start and the end of the growing season in ENFs is challenging due to a lack of field measurements and difficulty in interpreting satellite data, which are impacted by snow and cloud cover, and the pervasive "greenness" of these systems.

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Capturing carbon dioxide (CO) from the atmosphere is a scientific and technological challenge. CO can be captured by forming carbamate bonds with amines, most notably monoethanolamine (MEA). Regenerating MEA by releasing captured CO requires that the carbamate solution be heated.

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Background: Despite advancements in cystic fibrosis (CF) therapeutics, the persistence of chronic infections necessitates continued use of nebulized therapies. Though the Cystic Fibrosis Foundation recommends well-defined cleaning and disinfection of nebulizers to mitigate pathogen exposure risks, discrepancies between Cystic Fibrosis Foundation guidelines, manufacturers' instructions, and variability in center recommendations contribute to confusion and non-standardized practices.

Methods: A digital survey was distributed to directors, associate directors, and care coordinators of CF centers across the United States to investigate the methods, frequency, and educational practices surrounding nebulizer care they provide patients.

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The evolution of flight in an early winged insect ancestral lineage is recognized as a key adaptation explaining the unparalleled success and diversification of insects. Subsequent transitions and modifications to flight machinery, including secondary reductions and losses, also play a central role in shaping the impacts of insects on broadscale geographic and ecological processes and patterns in the present and future. Given the importance of insect flight, there has been a centuries-long history of research and debate on the evolutionary origins and biological mechanisms of flight.

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The rapid increase in aquaculture over the last several decades has led to concerns about the environmental impact of fish feeds relying on marine resources for fishmeal (FM). We aim to assess Nannochloropsis sp. QH25 co-product as a viable and sustainable replacement for FM in juvenile rainbow trout, Oncorhynchus mykiss, feeds.

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Background: Current treatments for Tourette syndrome (TS) and persistent tic disorder (PTD) are often insufficiently effective, inaccessible, and frequently associated with adverse events. Thus, we must continue to develop and test effective, accessible, and safe treatment options.

Objective: We aimed to conduct a pilot randomized controlled trial (RCT) comparing a novel, videoconference-delivered group mindfulness-based intervention for tics (MBIT) to videoconference-delivered group psychoeducation, relaxation, and supportive therapy (PRST) for adults with TS or PTD.

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The information transfer necessary for successful memory retrieval is believed to be mediated by theta and gamma oscillations. These oscillations have been linked to memory processes in electrophysiological studies, which were correlational in nature. In the current study, we used transcranial alternating current stimulation (tACS) to externally modulate brain oscillations to examine its direct effects on memory performance.

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Induced Power Scaling Alone Cannot Explain Griffenfly Gigantism.

Integr Comp Biol

September 2024

Institut de Systématique, Evolution, Biodiversité, Muséum National d'Histoire Naturelle, Paris F-75005, France.

Paleozoic skies were ruled by extinct odonatopteran insects called "griffenflies," some with wingspans 3 times that of the largest extant dragonflies and 10 times that of common extant dragonflies. Previous studies suggested that flight was possible for larger fliers because of higher atmospheric oxygen levels, which would have increased air density. We use actuator disk theory to evaluate this hypothesis.

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Prescription drug monitoring program use by opioid prescribers: a cross-sectional study.

Health Aff Sch

December 2023

National Bureau of Economic Research, Cambridge, MA 02138, United States.

Clinician use of prescription drug monitoring programs (PDMPs) has been linked to better patient outcomes, but state requirements to use PDMPs are unevenly enforced. We assessed PDMP use in Minnesota, which requires opioid prescribers to hold accounts and, in most cases, search the PDMP before prescribing, but where enforcement authority is limited. Using 2023 PDMP data, we found that 4 in 10 opioid prescribers did not search and 2 in 10 did not hold an account.

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Soft skeletons transmit force with variable gearing.

J Exp Biol

April 2024

Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, CA 92697-2525, USA.

A hydrostatic skeleton allows a soft body to transmit muscular force via internal pressure. A human's tongue, an octopus' arm and a nematode's body illustrate the pervasive presence of hydrostatic skeletons among animals, which has inspired the design of soft engineered actuators. However, there is a need for a theoretical basis for understanding how hydrostatic skeletons apply mechanical work.

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The role of theta and gamma oscillations in item memory, source memory, and memory confidence.

Psychophysiology

September 2024

Department of Psychology and Program in Neuroscience, Bowdoin College, Brunswick, Maine, USA.

Theta and gamma oscillations have been linked to episodic memory processes in various studies. Both oscillations seem to be vital for processes guided by the medial temporal lobe, such as the retrieval of information from memory. While theta oscillations increase with successful memory, it is unclear what the unique contribution of theta is to various subcomponents of memory.

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Unlabelled: The impacts of microsporidia on host individuals are frequently subtle and can be context dependent. A key example of the latter comes from a recently discovered microsporidian symbiont of , the net impact of which was found to shift from negative to positive based on environmental context. Given this, we hypothesized low baseline virulence of the microsporidian; here, we investigated the impact of infection on hosts in controlled conditions and the absence of other stressors.

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Chemical biology tools to probe bacterial glycans.

Curr Opin Chem Biol

June 2024

Department of Chemistry and Biochemistry, Bowdoin College, 6600 College Station, Brunswick, ME 04011, USA. Electronic address:

Bacterial cells are covered by a complex carbohydrate coat of armor that allows bacteria to thrive in a range of environments. As a testament to the importance of bacterial glycans, effective and heavily utilized antibiotics including penicillin and vancomycin target and disrupt the bacterial glycocalyx. Despite their importance, the study of bacterial glycans lags far behind their eukaryotic counterparts.

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