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Miniature of Study of the decay Λc<sup>+</sup>→λl<sup>+</sup>νl
Study of the decay Λc+→λl+νl

Date: 1994-03-10

Creator: T. Bergfeld, B. I. Eisenstein, G. Gollin, B. Ong, M., Palmer, M. Selen, J. J. Thaler, A. J. Sadoff, R. Ammar, S. Ball, P. Baringer, A. Bean, D. Besson, D. Coppage, N. Copty, R. Davis, N. Hancock, M. Kelly, N. Kwak, H. Lam, Y. Kubota, M. Lattery, J. K. Nelson, D. Patton, D. Perticone, R. Poling, V. Savinov, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim

Access: Open access

Using the CLEO II detector at CESR we observe 500 Λl+ pairs consistent with the semileptonic decay Λc+ → λ+ν We measure σ(e+e- → Λ+cX) · B(Λ+c → Λl+νl) = 4.77±0.25±0.66 pb. Combining with the charm semileptonic width and the lifetime of the Λc we also obtain B(Λ+c → pK-π+). We find no evidence for Λl+νl final states in which there are additional Λ+c decay products. We measure the decay asymmetry parameter of Λ+c → Λe+νe to be αΛc = -0.89+0.17+0.09-0.11-0.05. © 1994.
Miniature of Adjusting to Global change through clonal growth and epigenetic variation
Adjusting to Global change through clonal growth and epigenetic variation

Date: 2016-07-26

Creator: Richard S. Dodd, Vladimir Douhovnikoff

Access: Open access

The earth is experiencing major changes in global and regional climates and changes are predicted to accelerate in the future. Many species will be under considerable pressure to evolve, to migrate, or be faced with extinction. Clonal plants would appear to be at a particular disadvantage due to their limited mobility and limited capacity for adaptation. However, they have outlived previous environmental shifts and clonal species have persisted for millenia. Clonal spread offers unique ecological advantages, such as resource sharing, risk sharing, and economies of scale among ramets within genotypes. We suggest that ecological attributes of clonal plants, in tandem with variation in gene regulation through epigenetic mechanisms that facilitate and optimize phenotype variation in response to environmental change may permit them to be well suited to projected conditions.
Miniature of Report of the President, Bowdoin College 1899-1900
Report of the President, Bowdoin College 1899-1900

Date: 1900-01-01

Access: Open access

Miniature of Report of the President, Bowdoin College 1959-1960
Report of the President, Bowdoin College 1959-1960

Date: 1960-01-01

Access: Open access

Miniature of Accounting for Gender Differences in Cultural Industries: Evidence from Film and the Fine Arts
Accounting for Gender Differences in Cultural Industries: Evidence from Film and the Fine Arts
Access to this record is restricted to members of the Bowdoin community. Log in here to view.

      Date: 2020-01-01

      Creator: Madeleine Rose Dupré

      Access: Access restricted to the Bowdoin Community

        Miniature of Bowdoin College Catalogue (1945-1946)
        Bowdoin College Catalogue (1945-1946)

        Date: 1946-01-01

        Access: Open access

        Bowdoin College Bulletin no. 277
        Miniature of Similarities and differences in circuit responses to applied Gly <sup>1</sup> -SIFamide and peptidergic (Gly <sup>1</sup> -SIFamide) neuron stimulation
        Similarities and differences in circuit responses to applied Gly 1 -SIFamide and peptidergic (Gly 1 -SIFamide) neuron stimulation

        Date: 2019-03-01

        Creator: Dawn M. Blitz, Andrew E. Christie, Aaron P. Cook, Patsy S. Dickinson, Michael P., Nusbaum

        Access: Open access

        Similarities and differences in circuit responses to applied Gly 1 -SIFamide and peptidergic (Gly 1 -SIFamide) neuron stimulation. J Neurophysiol 121: 950 –972, 2019. First published January 16, 2019; doi:10.1152/jn.00567.2018.—Microcircuit modulation by peptides is well established, but the cellular/synaptic mechanisms whereby identified neurons with identified peptide transmitters modulate microcircuits remain unknown for most systems. Here, we describe the distribution of GYRKPPFNGSIFamide (Gly 1 -SIFamide) immunoreactivity (Gly 1 -SIFamide-IR) in the stomatogastric nervous system (STNS) of the crab Cancer borealis and the Gly 1 -SIFamide actions on the two feeding-related circuits in the stomatogastric ganglion (STG). Gly 1 -SIFamide-IR localized to somata in the paired commissural ganglia (CoGs), two axons in the nerves connecting each CoG with the STG, and the CoG and STG neuropil. We identified one Gly 1 -SIFamide-IR projection neuron innervating the STG as the previously identified modulatory commissural neuron 5 (MCN5). Brief (~10 s) MCN5 stimulation excites some pyloric circuit neurons. We now find that bath applying Gly 1 -SIFamide to the isolated STG also enhanced pyloric rhythm activity and activated an imperfectly coordinated gastric mill rhythm that included unusually prolonged bursts in two circuit neurons [inferior cardiac (IC), lateral posterior gastric (LPG)]. Furthermore, longer duration (±30 s) MCN5 stimulation activated a Gly 1 -SIFamide-like gastric mill rhythm, including prolonged IC and LPG bursting. The prolonged LPG bursting decreased the coincidence of its activity with neurons to which it is electrically coupled. We also identified local circuit feedback onto the MCN5 axon terminals, which may contribute to some distinctions between the responses to MCN5 stimulation and Gly 1 -SIFamide application. Thus, MCN5 adds to the few identified projection neurons that modulate a well-defined circuit at least partly via an identified neuropeptide transmitter and provides an opportunity to study peptide regulation of electrical coupled neurons in a functional context. NEW & NOTEWORTHY Limited insight exists regarding how identified peptidergic neurons modulate microcircuits. We show that the modulatory projection neuron modulatory commissural neuron 5 (MCN5) is peptidergic, containing Gly 1 -SIFamide. MCN5 and Gly 1 -SIFamide elicit similar output from two well-defined motor circuits. Their distinct actions may result partly from circuit feedback onto the MCN5 axon terminals. Their similar actions include eliciting divergent activity patterns in normally coactive, electrically coupled neurons, providing an opportunity to examine peptide modulation of electrically coupled neurons in a functional context.
        Miniature of Report of the President, Bowdoin College 1988-1989
        Report of the President, Bowdoin College 1988-1989

        Date: 1989-01-01

        Access: Open access

        Miniature of Bowdoin College Catalogue (1939-1940)
        Bowdoin College Catalogue (1939-1940)

        Date: 1940-01-01

        Access: Open access

        Bowdoin College Bulletin no. 249
        Miniature of Report of the President, Bowdoin College 1985-1986
        Report of the President, Bowdoin College 1985-1986

        Date: 1986-01-01

        Access: Open access

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