Energetic metal-organic framework based on multinuclear clusters of Cu(II) and Fe(III) and its catalytic action on thermal decomposition of solid propellant components (RDX, HMX, CL-20 and AP)

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147394 - 147394

Published: Nov. 22, 2023

Language: Английский

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Application of Sustainable Development of Teaching in Engineering Education: A Case Study of Undergraduate Course Design of Raman Spectroscopy Based on Virtual Reality (VR) Technology

Sustainability, Journal Year: 2023, Volume and Issue: 15(3), P. 1782 - 1782

Published: Jan. 17, 2023

One of the core objectives Washington Agreement, most influential international agreement on mutual recognition degrees in engineering education, is to ensure continuous improvement professional teaching. Education for sustainable development a vital direction teaching reform and higher education. Taking Raman spectroscopy course as an example, this paper discusses VR-based design strengths limitations course. The idea computational thinking immersive learning realized by introducing VR technology. Based research status field spectroscopy, contents 10 courses are redesigned. Through questionnaire survey, peer review, interview, rationality evaluated, based this, feedback mechanism established Eventually, advantages disadvantages new curriculum corresponding model put forward. According research, although 85% students said that it difficult accept at short notice, 90% more recognize model. They believe changes their traditional habits helps cultivate self-learning ability. results can be utilized crucial reference education provide reliable

Language: Английский

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Terahertz Radiation from High Electron Mobility Avalanche Transit Time Sources Prospective for Biomedical Spectroscopy

Photonics, Journal Year: 2023, Volume and Issue: 10(7), P. 800 - 800

Published: July 10, 2023

A Schottky barrier high-electron-mobility avalanche transit time (HEM-ATT) structure is proposed for terahertz (THz) wave generation. The laterally oriented and based on AlGaN/GaN two-dimensional electron gas (2-DEG). Trenches are introduced at different positions of the top AlGaN layer realizing sheet carrier density profiles 2-DEG channel; resulting devices equivalent to high–low, low–high low-high–low quasi-Read structures. DC, large-signal noise simulations HEM-ATTs were carried out using Silvaco ATLAS platform, non-sinusoidal-voltage-excited double-iterative field-maximum small-signal simulation models, respectively. breakdown voltages estimated via validated by experimental measurements; they found be around 17–18 V. Under conditions, series resistance device 20 Ω. shows that HEM-ATT source capable delivering nearly 300 mW continuous-wave peak power with 11% conversion efficiency 1.0 THz, which a significant improvement over achievable THz output from conventional vertical GaN double-drift region (DDR) IMPATT source. performance was significantly improved structures compared structure. These compatible state-of-the-art medium-scale semiconductor fabrication processes, scope further miniaturization, may have potential application in compact biomedical spectroscopy systems as solid-state sources.

Language: Английский

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Evidence of Correlation between Membrane Phase Transition and Clonogenicity in Dehydrating Acinetobacter baumannii: A Combined Micro-Raman and AFM Study

The Journal of Physical Chemistry B, Journal Year: 2024, Volume and Issue: 128(28), P. 6806 - 6815

Published: July 3, 2024

The Gram-negative bacterium

Language: Английский

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Dryland Endolithic Chroococcidiopsis and Temperate Fresh Water Synechocystis Have Distinct Membrane Lipid and Photosynthesis Acclimation Strategies upon Desiccation and Temperature Increase

Plant and Cell Physiology, Journal Year: 2023, Volume and Issue: 65(6), P. 939 - 957

Published: Nov. 7, 2023

Abstract An effect of climate change is the expansion drylands in temperate regions, predicted to affect microbial biodiversity. Since photosynthetic organisms are at base ecosystem’s trophic networks, we compared an endolithic desiccation-tolerant Chroococcidiopsis cyanobacteria isolated from gypsum rocks Atacama Desert with a freshwater desiccation-sensitive Synechocystis. We sought whether some acclimation traits response desiccation and temperature variations were shared, evaluate potential species possibly become resilient future arid conditions. When varies, Synechocystis tunes acyl composition its lipids, via homeoviscous mechanism known adjust membrane fluidity, whereas no such occurs Chroococcidiopsis. Vice versa, combined study photosynthesis pigment content shows that remodels components keeps optimal capacity all temperatures, unable adjustment. Upon on surface, rapidly revive, capable recover after three weeks. Using X-ray diffraction, found evidence could use water extracted crystals conditions as surrogate for missing water. The sulfolipid sulfoquinovosyldiacylglycerol becomes prominent lipid both dehydrated cyanobacteria, highlighting overlooked function this lipid. minimal level monogalactosyldiacylglycerol, which may be essential recovery process. Results support two independent adaptation strategies have evolved these cope increase suggest possible scenarios biodiversity triggered by change.

Language: Английский

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DSEMR: A database for special environment microorganisms resource and associating them with synthetic biological parts

Synthetic and Systems Biotechnology, Journal Year: 2023, Volume and Issue: 8(4), P. 647 - 653

Published: Oct. 2, 2023

Special environmental microorganisms are considered to be of great industrial application value because their special genotypes, physiological functions and metabolites. The research development will certainly bring about some innovations in biotechnology processes change the face bioengineering. Environmental Microbial Database (DSEMR) is a comprehensive database that provides information on microbial resources correlates them with synthetic biological parts. DSEMR aggregates specific genomes, properties, culture media, parts, metabolic pathways, online tool analysis data, including 5268 strains from 620 genera, 31 42,126 In short, become an important resource for study environments actively promote biology.

Language: Английский

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Refractive index sensing of spoof surface plasmon polaritons excited on graphene strips based on cylindrical dielectric metasurface coupling

Results in Physics, Journal Year: 2024, Volume and Issue: 58, P. 107539 - 107539

Published: March 1, 2024

In this paper, we present a novel terahertz plasmonic sensing concept that utilizes metasurface coupler to excite spoof surface plasmon polaritons (SSPs) modes on graphene strips. The dielectric unit cell consists of two silicon cylindrical rods with different radii quartz substrate. Vertically incident waves are deflected by the metasurface, resulting in transverse wave-vector within substrate matches SSPs supported This enables efficient excitation strips surface, leading absorption resonances range 0.420–0.430 THz high quality (Q) factor 152. We then applied device for refractive index sensing, and investigation results indicate Q spectrum experience shifts changes target substance, sensitivity 110 GHz/RIU. designed structure study exhibits significant potential applications trace substance detection.

Language: Английский

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A Comparative Study of Dry Biomasses of Azospirillum lipoferum Sp59b by Vibrational Spectroscopy Techniques

Microbiology, Journal Year: 2024, Volume and Issue: 93(S1), P. S153 - S156

Published: Dec. 1, 2024

Language: Английский

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New Frontier in Terahertz Technologies for Virus Sensing

Electronics, Journal Year: 2022, Volume and Issue: 12(1), P. 135 - 135

Published: Dec. 28, 2022

The recent pandemic of SARS-CoV-2 virus has made evident critical issues relating to sensing and the need for deployable tools adequate, rapid, effective viral recognition on a large-scale. Although many conventional molecular immuno-based techniques are widely used these purposes, they still have some drawbacks concerning sensitivity, safety, laboriousness, long-term collection data analysis. Therefore, new rapidly emerging approaches been introduced such as terahertz (THz)-based technologies. In this contribution, we summarize THz radiation technology, its solutions applications high-sensitivity detection.

Language: Английский

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Modeling of a multireflector terahertz imaging system using a geometrical optics model based on angular spectrum theory

Optics Express, Journal Year: 2023, Volume and Issue: 31(11), P. 17226 - 17226

Published: May 2, 2023

We propose a simulation method for multireflector terahertz imaging system. The description and verification of the are based on an existing active bifocal system at 0.22 THz. Using phase conversion factor angular spectrum propagation, computation incident received fields requires only simple matrix operation. angle is used to calculate ray tracking direction, total optical path scattering field defective foams. Compared with measurements simulations aluminum disks foams, validity confirmed in view 50 cm × 90 8 m. This work aims develop better systems by predicting their behavior different targets before manufacturing.

Language: Английский

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