The Effects of Sex and Reproductive Condition on Chemosensory Communication in the Terrestrial Salamander, Plethodon shermani

Non-volatile chemosensory cues may be detected by sensory neurons of the vomeronasal organ (VNO) and elicit changes in reproductive behavior and physiology of conspecifics. In the terrestrial salamander, Plethodon shermani, the VNO of males is larger than that of females, despite males\u27 smaller overall body size. I hypothesized that a larger VNO reflects an enhanced ability to detect chemosensory cues, and that animals with elevated levels of steroid levels would be more sensitive to cues from the opposite sex. Chemo-investigatory behavior was both sexually dimorphic and hormonally modulated. In contrast, responsiveness of the VNO (as measured by agmatine uptake, a marker of sensory neuron activation) to chemosensory cues did not differ between the sexes or animals with different levels of sex steroid hormones. Differences in responsiveness to chemosensory cues between the sexes and reproductive conditions is occurring behaviorally, but not at the level of the VNO

Micellar dye shuttle between water and an ionic liquid

The reversible transfer of poly(2-ethyl-2-oxazoline)-block-poly(2-nonyl-2-oxazoline) nanocarriers comprising encapsulated dyes is demonstrated between water and an ionic liquid. This dye transfer concept is shown to be applicable for loading and delivery of dye molecules as well as to provide a protective environment for the encapsulated dye

Improvements in Research Orientation and Reductions in Barriers to Research Utilization among Undergraduate Students in Health Sciences

Purpose: Developing research skills while improving research orientation among undergraduate students may increase evidence-based practice later in their professional careers. Method: Undergraduate Health Science students (n=241) participated in a pretest-posttest design to determine the impact of a course that includes team-based, student initiated research projects completed within one semester. Modified versions of the Edmonton Research Orientation Survey (EROS) and the Barriers to Research Utilization Scale (BARRIERS) were completed at the beginning and end of the semesters. Results: Students reported gains in six research skills and improvements in two of the Edmonton Research Orientation Survey subscales: involvement in research and evidence-based practice. Students reported reductions in all four Barriers to Research Utilization Scale subscales: adopter, organization, innovation, and communication. Conclusion: Improvements in research orientation and reductions in perceived barriers due to high-impact learning activities may eventually facilitate evidence-based practice

Validando a plataforma Wikiaves como ferramenta para estudos de padrões migratórios de aves no Brasil

Orientadora: Lilian Tonelli Manica.Coorientador: André de Camargo Guaraldo.Monografia (bacharelado) - Universidade Federal do Paraná. Setor de Ciências Biológicas. Curso de Graduação em Ciências Biológica

Microwave-Assisted Synthesis of Core–Shell Nanoparticles—Insights into the Growth of Different Geometries

Microwave irradiation is utilized for the rapid synthesis of gold–silver core–shell bimetallic nanoparticles (NPs) in a two-step process. A strategy of establishing a bilayer organic barrier around the core using citrate and ascorbic acid as capping agents, providing a means to achieve a well-defined boundary layer between the core and the shell material, is reported. These boundary layers are essential for synthesizing different core–shell morphologies and the approach results in tunable bimetallic NPs with defined core–shell structures, both for spherical as well as for triangular seed cores. In addition, theoretical calculations of the plasmonic characteristics based on the boundary element method of different classes of NPs are conducted. These investigations enable conclusions to be drawn on the influence of the core morphology on the tunability of their localized surface plasmon resonances. © 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinhei

On the stability of microwave-fabricated SERS substrates - chemical and morphological considerations

The stability of surface-enhanced Raman spectroscopy (SERS) substrates in different organic solvents and different buffer solutions was investigated. SERS substrates were fabricated by a microwave-assisted synthesis approach and the morphological as well as chemical changes of the SERS substrates were studied. It was demonstrated that the SERS substrates treated with methanol, ethanol, or N,N-dimethylformamide (DMF) were comparable and showed overall good stability and did not show severe morphological changes or a strong decrease in their Raman activity. Toluene treatment resulted in a strong decrease in the Raman activity whereas dimethyl sulfoxide (DMSO) treatment completely preserved or even slightly improved the Raman enhancement capabilities. SERS substrates immersed into phosphate-buffered saline (PBS) solutions were observed to be rather instable in low and neutral pH buffer solutions. Other buffer systems showed less severe influences on the SERS activity of the substrates and a carbonate buffer at pH 10 was found to even improve SERS performance. This study represents a guideline on the stability of microwave-fabricated SERS substrates or other SERS substrates consisting of non-stabilized silver nanoparticles for the application of different organic solvents and buffer solutions

Hybrid Energy Storage Systems Based on Redox-Flow Batteries: Recent Developments, Challenges, and Future Perspectives

Recently, the appeal of Hybrid Energy Storage Systems (HESSs) has been growing in multiple application fields, such as charging stations, grid services, and microgrids. HESSs consist of an integration of two or more single Energy Storage Systems (ESSs) to combine the benefits of each ESS and improve the overall system performance, e.g., efficiency and lifespan. Most recent studies on HESS mainly focus on power management and coupling between the different ESSs without a particular interest in a specific type of ESS. Over the last decades, Redox-Flow Batteries (RFBs) have received significant attention due to their attractive features, especially for stationary storage applications, and hybridization can improve certain characteristics with respect to short-term duration and peak power availability. Presented in this paper is a comprehensive overview of the main concepts of HESSs based on RFBs. Starting with a brief description and a specification of the Key Performance Indicators (KPIs) of common electrochemical storage technologies suitable for hybridization with RFBs, HESS are classified based on battery-oriented and application-oriented KPIs. Furthermore, an optimal coupling architecture of HESS comprising the combination of an RFB and a Supercapacitor (SC) is proposed and evaluated via numerical simulation. Finally, an in-depth study of Energy Management Systems (EMS) is conducted. The general structure of an EMS as well as possible application scenarios are provided to identify commonly used control and optimization parameters. Therefore, the differentiation in system-oriented and application-oriented parameters is applied to literature data. Afterwards, state-of-the-art EMS optimization techniques are discussed. As an optimal EMS is characterized by the prediction of the system’s future behavior and the use of the suitable control technique, a detailed analysis of the previous implemented EMS prediction algorithms and control techniques is carried out. The study summarizes the key aspects and challenges of the electrical hybridization of RFBs and thus gives future perspectives on newly needed optimization and control algorithms for management systems

Developing a health sciences information literacy assessment for undergraduates.

This poster describes the development and pilot of a tailored information literacy assessment tool for undergraduate allied health students. Tool development included collaboration between assessment experts, Health Science faculty, and Health Science librarians. The poster includes results from the tool deployment and next steps in applying results back into revised curriculum

Non-Hermitian propagation of Hagedorn wavepackets

We investigate the time evolution of Hagedorn wavepackets by non-Hermitian quadratic Hamiltonians. We state a direct connection between coherent states and Lagrangian frames. For the time evolution a multivariate polynomial recursion is derived that describes the activation of lower lying excited states, a phenomenon unprecedented for Hermitian propagation. Finally we apply the propagation of excited states to the Davies--Swanson oscillator.Comment: 34 pages, 1 figur