scholarly journals Morphologically Diverse Micro- and Macrostructures Created via Solvent Evaporation-Induced Assembly of Fluorescent Spherical Particles in the Presence of Polyethylene Glycol Derivatives

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4294
Author(s):  
Mina Han ◽  
Ikue Abe ◽  
Kazunori Matsuura ◽  
Yukikazu Takeoka ◽  
Takahiro Seki
Keyword(s):  
Polyethylene Glycol ◽  
Noncovalent Interactions ◽  
Morphological Evolution ◽  
Solvent Evaporation ◽  
Spherical Particles ◽  
Linear Chains ◽  
Fluorescence Switching ◽  
And Performance ◽  
Air Liquid Interface ◽  
Insight Into

The creation of fluorescent micro- and macrostructures with the desired morphologies and sizes is of considerable importance due to their intrinsic functions and performance. However, it is still challenging to modulate the morphology of fluorescent organic materials and to obtain insight into the factors governing the morphological evolution. We present a facile bottom-up approach to constructing diverse micro- and macrostructures by connecting fluorescent spherical particles (SPs), which are generated via the spherical assembly of photoisomerizable azobenzene-based propeller-shaped chromophores, only with the help of commercially available polyethylene glycol (PEG) derivatives. Without any extra additives, solvent evaporation created a slow morphological evolution of the SPs from short linear chains (with a length of a few micrometers) to larger, interconnected networks and sheet structures (ranging from tens to >100 µm) at the air–liquid interface. Their morphologies and sizes were significantly dependent on the fraction and length of the PEG. Our experimental results suggest that noncovalent interactions (such as hydrophobic forces and hydrogen bonding) between the amphiphilic PEG chains and the relatively hydrophobic SPs were weak in aqueous solutions, but play a crucial role in creating the morphologically diverse micro- and macrostructures. Moreover, short-term irradiation with visible light caused fast morphological crumpling and fluorescence switching of the obtained structures.

An insight into the effect of calcination conditions on catalytic cracking of toluene over 3Fe8Ni/palygorskite: Catalysts characterization and performance

Fuel ◽  
2017 ◽  
Vol 190 ◽  
pp. 47-57 ◽  
Author(s):  
Xuehua Zou ◽  
Tianhu Chen ◽  
Haibo Liu ◽  
Ping Zhang ◽  
Zhiyuan Ma ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
And Performance ◽  
Insight Into

scholarly journals Elucidation and refinement of synthetic receptor mechanisms

2020 ◽  
Author(s):  
Hailey I. Edelstein ◽  
Patrick S. Donahue ◽  
Joseph J. Muldoon ◽  
Anthony K. Kang ◽  
Taylor B. Dolberg ◽  
...  
Keyword(s):  
Transmembrane Domain ◽  
Functional Performance ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Performance Characteristics ◽  
Therapeutic Gene ◽  
High Performing ◽  
Synthetic Receptor ◽  
And Performance ◽  
Insight Into

ABSTRACTSynthetic receptors are powerful tools for engineering mammalian cell-based devices. These biosensors enable cell-based therapies to perform complex tasks such as regulating therapeutic gene expression in response to sensing physiological cues. Although multiple synthetic receptor systems now exist, many aspects of receptor performance are poorly understood. In general, it would be useful to understand how receptor design choices influence performance characteristics. In this study, we examined the modular extracellular sensor architecture (MESA) and systematically evaluated previously unexamined design choices, yielding substantially improved receptors. A key finding that might extend to other receptor systems is that the choice of transmembrane domain (TMD) is important for generating high-performing receptors. To provide mechanistic insights, we adopted and employed a Förster resonance energy transfer (FRET)-based assay to elucidate how TMDs affect receptor complex formation and connected these observations to functional performance. To build further insight into these phenomena, we developed a library of new MESA receptors that sense an expanded set of ligands. Based upon these explorations, we conclude that TMDs affect signaling primarily by modulating intracellular domain geometry. Finally, to guide the design of future receptors, we propose general principles for linking design choices to biophysical mechanisms and performance characteristics.

The Oxford Handbook of Time in Music

2021 ◽  
Keyword(s):  
Cultural Studies ◽  
Music Theory ◽  
Musical Work ◽  
Musical Practice ◽  
Musical Time ◽  
Music Making ◽  
Nature Of Time ◽  
And Performance ◽  
Insight Into ◽  
Profound Insight

As the art that calls most attention to temporality, music provides us with profound insight into the nature of time, and time equally offers us one of the richest lenses through which to interrogate musical practice and thought. In this volume, musical time, arrayed across a spectrum of genres and performance/compositional contexts is explored from a multiplicity of perspectives. The contributions to the volume all register the centrality of time to our understanding of music and music-making and offer perspectives on time in music, particularly though not exclusively attending to contemporary forms of musical work. In sharing insights drawn from philosophy, music theory, ethnomusicology, psychology of performance and cultural studies, the book articulates a range of understandings on the metrics, politics and socialities woven into musical time.

Technology-Enhanced Learning Standard through Integration of Modeling and Simulation into Engineering Study Programs

2012 ◽  
pp. 157-177
Author(s):  
Dietmar P. F. Moeller ◽  
Hamid Vakilzadian
Keyword(s):  
Modeling And Simulation ◽  
Electrical Engineering ◽  
Technology Enhanced Learning ◽  
Engineering System ◽  
Engineering Study ◽  
Study Programs ◽  
And Performance ◽  
University Of Nebraska Lincoln ◽  
Enhanced Learning ◽  
Insight Into

Introducing a technology-enhanced learning standard in engineering study programs requires a deeper insight into and understanding of the complexity and dynamics of today’s engineering systems. This can be achieved by embedding Modeling and Simulation (M&S) within engineering study programs to stimulate educational innovations in undergraduate engineering curricula, such as electrical engineering. An example of this is in the process of being implemented in the Department of Electrical Engineering (EE) at the University of Nebraska – Lincoln (UNL). The need for such programs is evident by recent recommendations from the White House, the U.S. Congress, and the National Science Foundation, all of which stress that M&S is one of the key enabling technologies of the 21st century and is critical to U.S. competitiveness. Various models of a dynamic engineering system can be developed at different levels of detail in accordance with the recommended technical specifications to gain better insight into the behavior, stability, and performance of a system. The functionality of a real engineering system can be tested virtually by changing the structure, parameters, and inputs and outputs of the model to accurately predict the response of the system under various operating conditions. In order to educate a skilled workforce capable of meeting the country’s critical needs, the educational requirements for undergraduates in an M&S-based EE program have to be developed. Such a program needs to meet the accreditation requirements set by the Accreditation Board for Engineering and Technology Inc. (ABET).

Insight into the ultrasonication of graphene oxide with strong changes in its properties and performance for adsorption applications

2019 ◽  
Vol 373 ◽  
pp. 1212-1222 ◽  
Author(s):  
Giang T.T. Le ◽  
Narong Chanlek ◽  
Jedsada Manyam ◽  
Pakorn Opaprakasit ◽  
Nurak Grisdanurak ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
And Performance ◽  
Insight Into

scholarly journals Calibrations and Performance of the Airborne Cloud Extinction Probe

2014 ◽  
Vol 31 (2) ◽  
pp. 326-345 ◽  
Author(s):  
Alexei Korolev ◽  
Alex Shashkov ◽  
Howard Barker
Keyword(s):  
Crystal Surface ◽  
Theoretical Calculations ◽  
Light Attenuation ◽  
Spherical Particles ◽  
Nonspherical Particles ◽  
Cloud Droplets ◽  
Fine Crystal ◽  
A New Technique ◽  
And Performance ◽  
Scattering Phase Function

Abstract A new airborne instrument that measures extinction coefficient β in clouds and precipitation has been designed by Environment Canada. The cloud extinction probe (CEP) utilizes the transmissometric method, which is based on direct measurement of light attenuation between the transmitter and receiver. Transmissometers are known to be susceptible to forward scattering, which becomes increasingly significant as the particle size increases. A new technique for calibrating transmissometers was developed here in order to determine the response function of the probe. Laboratory calibrations show that CEP-derived β may be underestimated by a factor of 2 for circular particles with diameters greater than 100 μm. Results for spherical particles are in good agreement with theoretical predictions. For nonspherical particles, however, estimates of β can deviate significantly from those derived for spheres that have the same projected area. For in situ observations of ice particles, CEP measurements often deviate significantly from theoretical calculations, whereas for small cloud droplets agreement is good. It is hypothesized that CEP-derived estimates of β for ice clouds depend much on variations in the scattering phase function that arise from details in ice crystal surface roughness and fine crystal structure. This would complicate greatly the estimation of β from transmissometers for ice-bearing clouds.

Fast computation of accurate sphere-cube intersection volume

2017 ◽  
Vol 34 (4) ◽  
pp. 1204-1216 ◽  
Author(s):  
Bruce D. Jones ◽  
John R. Williams
Keyword(s):  
Linear Relationship ◽  
Design Methodology ◽  
Particle Systems ◽  
Spherical Particles ◽  
Immersed Boundary ◽  
Computationally Efficient ◽  
Content Type ◽  
Linear Approach ◽  
Large Numbers ◽  
And Performance

Purpose Volume mapping of large spherical particles to a Cartesian grid with smaller grid elements is typically required in application of simple immersed boundary conditions in coupled engineering simulations. However, there exists no unique analytical solution to computation of the volume of intersection between spheres and cubes. The purpose of this paper is to determine a suitable solution to this problem depending on the required level of accuracy. Design/methodology/approach In this work, existing numerical techniques for computing intersection volume are reviewed and compared in terms of accuracy and performance. In addition to this, a more efficient linear relationship is proposed and included in this comparison. Findings The authors find in this work that a simple linear relationship is both acceptably accurate and more computationally efficient than the contemporary techniques. Originality/value This simple linear approach may be applied to accurately compute solutions to fluid-particle systems with very large numbers of particles.

Oversight or out of sight: the intersection between talent management, OHS governance and the issues for boards

2011 ◽  
Vol 51 (2) ◽  
pp. 724
Author(s):  
Lisa Barry
Keyword(s):  
Corporate Governance ◽  
Human Capital ◽  
Environmental Performance ◽  
Data Analytics ◽  
Talent Management ◽  
Deepwater Horizon ◽  
Technical Expertise ◽  
Corporate History ◽  
And Performance ◽  
Insight Into

In the wake of the Montara spill many companies have renewed efforts to review and implement leading safety and environmental performance; however, the issue is conceivably even more fundamental. With the recent Deepwater Horizon spillage, BP has booked a $US 32.2 billion provision to cover the costs of the spill—with the result that the company recorded the worst quarterly loss in British corporate history. What would a board need to know, in what form, and by when, in such a situation? Does the governance of such issues need to be strengthened? And in what way? How material and how effective is the oversight exercised by boards over operations of high technical expertise and remote location? What are the questions that boards should be asking about safety and environmental performance? And what are the real lead indicators of risk and performance shortfall? This presentation will draw from research by Deloitte’s Centre for Corporate Governance, as well as from interviews with Australian directors. It will also explore the issue of safety and environmental risk from the human capital perspective of talent management and shortage—mindful that the very impetus for the recently released report by the National Resources Sector Employment Taskforce was the decision to sanction the Gorgon LNG Project now underway. Finally, this presentation will outline some of the latest data analytics available to boards and management to gain insight into OHS and environmental incidents so that they can design measurable interventions to minimise risk.

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