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Records added in 2021
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Showing records 201 to 225 of 798. [First] Page: 5 6 7 8 9 10 11 12 13 Last
Methods for Identification of Substrates/Inhibitors of FCP/SCP Type Protein Ser/Thr Phosphatases
Masataka Mizunuma, Atsushi Kaneko, Shunta Imai, Kazuhiro Furukawa, Yoshiro Chuman
July 13, 2021 (v1)
Subject: Biosystems
Keywords: peptide phage display, protein Ser/Thr phosphatase, Scp1, substrate identification
Protein phosphorylation is the most widespread type of post-translational modification and is properly controlled by protein kinases and phosphatases. Regarding the phosphorylation of serine (Ser) and threonine (Thr) residues, relatively few protein Ser/Thr phosphatases control the specific dephosphorylation of numerous substrates, in contrast with Ser/Thr kinases. Recently, protein Ser/Thr phosphatases were reported to have rigid substrate recognition and exert various biological functions. Therefore, identification of targeted proteins by individual protein Ser/Thr phosphatases is crucial to clarify their own biological functions. However, to date, information on the development of methods for identification of the substrates of protein Ser/Thr phosphatases remains scarce. In turn, substrate-trapping mutants are powerful tools to search the individual substrates of protein tyrosine (Tyr) phosphatases. This review focuses on the development of novel methods for the identification of S... [more]
Special Issue on “Chemical Process Design, Simulation and Optimization”
Jean-Pierre Corriou, Jean-Claude Assaf
July 12, 2021 (v1)
Since humanity has been able to transform materials, such as raw minerals, and produce food or beverages, a central question was the type of operation and how and where it should be performed [...]
Distributed Model Predictive Control Applied to a Sewer System
Antonio Cembellín, Mario Francisco, Pastora Vega
July 12, 2021 (v1)
Keywords: Distributed Model Predictive Control (DMPC), fuzzy logic, sewer system
In this work, a Distributed Model Predictive Control (MPC) methodology with fuzzy negotiation among subsystems has been developed and applied to a simulated sewer network. The wastewater treatment plant (WWTP) receiving this wastewater has also been considered in the methodology by means of an additional objective for the problem. In order to decompose the system into interconnected local subsystems, sectorization techniques have been applied based on structural analysis. In addition, a dynamic setpoint generation method has been added to improve system performance. The results obtained with the proposed methodology are compared to those obtained with standard centralized and decentralized model predictive controllers.
Design and Fabrication of Partially Foamed Grid Structure Using Additive Manufacturing and Solid State Foaming
Byung Kyu Park, Charn-Jung Kim, Dong Eui Kwon, Youn-Woo Lee
July 12, 2021 (v1)
Subject: Materials
Keywords: 3D structure, additive manufacturing, copolymer, gradient foam, solid state foaming
A partially foamed lattice structure based on synthetic polymers was considered as a functionally graded materials due to their unique properties. In this study, a copolymer is manufactured to be porous functional materials by physical foaming technology, using carbon dioxide. Through morphological characterization, using scanning electron microscope, we identified a potential to fabricate partially foamed structures with micropores. We showed that variation of post-foaming temperature can tune the pore size distribution in the range of 0.9 to 30 μm. Thermal data of the foam grid from differential scanning calorimeter showed some shifts in glass transition, cold crystallization, and melting points. Mechanical strength and thermal conductivity were also measured to find rationale of thermal insulation with tunable mechanical strength and to elucidate the actual 3D lattice foam of a copolymer.
Automated Optimization for the Production Scheduling of Prefabricated Elements Based on the Genetic Algorithm and IFC Object Segmentation
Zhao Xu, Xiang Wang, Zezhi Rao
July 12, 2021 (v1)
Keywords: Genetic Algorithm, IFC standard, prefabrication, production schedule, segmentation
Background: With the ever-increasing availability of data and a higher level of automation and simulation, production scheduling in the factory for prefabrication can no longer be seen as an autonomous solution. Concepts such as building information modelling (BIM), graphic techniques, databases, and interface development as well as heightened emphasis on overall-process optimization topics increase the pressure to connect to and interact with interrelated tasks and procedures. Methods: The automated optimization framework detailed in this study intended to generate optimal schedule of prefabricated component production based on the manufacturing process model and genetic algorithm method. An extraction and segmentation approach based on industry foundation classes (IFC) for prefabricated component production is discussed. During this process, the position and geometric information of the prefabricated components are adjusted and output in the extracted IFC file. Then, the production p... [more]
Arundo donax Refining to Second Generation Bioethanol and Furfural
Isabella De Bari, Federico Liuzzi, Alfredo Ambrico, Mario Trupo
July 12, 2021 (v1)
Keywords: bioethanol, high gravity, hybrid SSF, lignocellulosic, xylose dehydration
Biomass-derived sugars are platform molecules that can be converted into a variety of final products. Non-food, lignocellulosic feedstocks, such as agroforest residues and low inputs, high yield crops, are attractive bioresources for the production of second-generation sugars. Biorefining schemes based on the use of versatile technologies that operate at mild conditions contribute to the sustainability of the bio-based products. The present work describes the conversion of giant reed (Arundo donax), a non-food crop, to ethanol and furfural (FA). A sulphuric-acid-catalyzed steam explosion was used for the biomass pretreatment and fractionation. A hybrid process was optimized for the hydrolysis and fermentation (HSSF) of C6 sugars at high gravity conditions consisting of a biomass pre-liquefaction followed by simultaneous saccharification and fermentation with a step-wise temperature program and multiple inoculations. Hemicellulose derived xylose was dehydrated to furfural on the solid a... [more]
Special Issue on “Modelling and Process Control of Fuel Cell Systems”
Mohd Azlan Hussain, Wan Ramli Wan Daud
July 12, 2021 (v1)
The ever increasing energy consumption, rising public awareness for environmental protection, and higher prices of fossil fuels have motivated many to look for alternative and renewable energy sources [...]
Novel Study for Energy Recovery from the Cooling−Solidification Stage of Synthetic Slag Manufacturing: Estimation of the Potential Energy Recovery
Francisco M. Baena-Moreno, Mónica Rodríguez-Galán, Benito Navarrete, Luis F. Vilches
July 12, 2021 (v1)
Subject: Other
Keywords: energy recovery, fixed bed regenerator, metal spheres, sustainable synthetic slag production, waste and energy nexus
Herein, a novel method for energy recovery from molten synthetic slags is analyzed. In this work, the potential energy that could be recovered from the production of synthetic slag is estimated by means of an integrated experimental−theoretical study. The energy to be recovered comes from the cooling−solidification stage of the synthetic slag manufacturing. Traditionally, the solidification stage has been carried out through quick cooling with water, which does not allow the energy recovery. In this paper, a novel cooling method based on metal spheres is presented, which allows the energy recovery from the molten slags. Two points present novelty in this work: (1) the method for measuring the metal spheres temperature (2) and the estimation of the energy that could be recovered from these systems in slag manufacturing. The results forecasted that the temperature achieved by the metal spheres was in the range of 295−410 °C in the center and 302−482 °C on the surface. Furthermore, we est... [more]
Investigation of Virulence Genes Detected in Antimicrobial-Resistance Pathogens Isolates for Five Countries across the World
Kevin Cui, Iris Gong, Alvin Dong, Jacob Yan, Max Wang, Zuyi Huang
July 12, 2021 (v1)
Subject: Biosystems
Keywords: antimicrobial resistance, data analysis, hierarchical clustering, NCBI Pathogen Detection Isolates Browser, principal component analysis, virulence genes
A large portion of annual deaths worldwide are due to infections caused by disease-causing pathogens. These pathogens contain virulence genes, which encode mechanisms that facilitate infection and microbial survival in hosts. More recently, antimicrobial resistance (AMR) genes, also found in these pathogens, have become an increasingly large issue. While the National Center for Biotechnology Information (NCBI) Pathogen Detection Isolates Browser (NPDIB) database has been compiling genes involved in microbial virulence and antimicrobial resistance through isolate samples, few studies have identified the genes primarily responsible for virulence and compared them to those responsible for AMR. This study performed the first multivariate statistical analysis of the multidimensional NPDIB data to identify the major virulence genes from historical pathogen isolates for Australia, China, South Africa, UK, and US—the largely populated countries from five of the six major continents. The import... [more]
Synthesis of European Union Biorefinery Supply Networks Considering Sustainability Objectives
Sanja Potrč, Lidija Čuček, Mariano Martin, Zdravko Kravanja
July 12, 2021 (v1)
Keywords: 2030 target, biorefinery supply network, European Union, mathematical programming, production of biofuels, Renewable and Sustainable Energy, sustainability profit
Increasing the use of renewable energy sources is one of the most important goals of energy policies in several countries to build a sustainable energy future. This contribution proposes the synthesis of a biorefinery supply network for a case study of the European Union (EU-27) under several scenarios based on a mathematical programming approach. Several biomass and waste sources, such as grains, waste oils, and lignocellulosics, are proposed to be utilized, and various biofuels including first, second, and third generations are produced such as bioethanol, green gasoline, biodiesel, Fischer Tropsch (FT) diesel, and hydrogen. The aim of this study is to evaluate the capabilities of EU-27 countries to be able to meet the Renewable Energy Directive (RED II) target regarding the share of renewable energy in the transport sector by 2030 in each Member State while not compromising the current production of food. A generic mathematical model has been developed for the multi-period optimizat... [more]
Optimisation of Protein Recovery from Arthrospira platensis by Ultrasound-Assisted Isoelectric Solubilisation/Precipitation
Ana Sánchez-Zurano, Ainoa Morillas-España, Cynthia Victoria González-López, Tomás Lafarga
July 12, 2021 (v1)
Keywords: cell wall disruption, microalgae, novel proteins, sonication, Spirulina
A response surface methodology was used to optimise the solubilisation and precipitation of proteins from the cyanobacterium Arthrospira platensis. Two separate experiments were designed and conducted in a sequential manner. Protein solubilisation was affected by pH, extraction time, and biomass to solvent ratio (p < 0.001). Although spray-drying and the osmotic shock suffered when resuspending the dried biomass into distilled water led to a certain degree of cell wall disruption, the amount of protein that could be solubilised without an additional disruption step was in the range 30−60%. Sequential extractions improved protein solubilisation by less than 5%. For this reason, a pre-treatment based on sonication (400 W, 24 kHz, 2 min) had to be used, allowing the solubilisation of 96.2% of total proteins. Protein precipitation was affected by both pH and extraction time (p < 0.001). The optimised precipitation conditions, which were pH 3.89 over 45 min, led to a protein recovery... [more]
At what pressure shall CO2 be transported by ship? An in-depth cost comparison of 7 and 15 barg shipping.
Simon Roussanaly, Han Deng, Geir Skaugen, Truls Gundersen
July 7, 2021 (v1)
Subject: Optimization
Keywords: Carbon Capture and Storage, CO2 shipping, CO2 transport, Optimal transport pressure, Technoeconomic Analysis
While pipeline transport traditionally has been regarded as the best option for CO2 transport due to its low cost over short distances and important economies of scale, interest in vessel-based transport of CO2 is growing. While virtually all recent literature has focused on low pressure transport (at 7 barg and -46°C), the issue of optimal transport conditions, in terms of pressure, temperature and gas composition, is becoming more relevant as carbon capture and storage chains based on ship transport move closer towards implementation.
This study focuses on an in-depth comparison of the two primary and relevant transport pressures, 7 and 15 barg, for annual volumes up to 20 MtCO2/y and transport distances up to 2000 km. We also address the impact of a number of key factors on optimal transport conditions, including (a) transport between harbours versus transport to an offshore site, (b) CO2 pressure prior to conditioning, (c) the presence of impurities and of purity constraints, and... [more]
Aspen Plus Simulations of a Lignocellulosic Biomass-to-Butanol Thermochemical Process
Chinedu Okoli, Thomas A Adams II
July 6, 2021 (v1)
Keywords: Aspen Plus, Biofuels, Biomass, Butanol, Kinetic Model, Lignocellulosic, Mixed Alcohol Synthesis, Simulation, Thermochemical
Several Aspen Plus simulation files are presented which were used in the research paper by Chinedu Okoli and Thomas A. Adams II: "Design and Assessment of Advanced Thermochemical Plants for Second Generation Biobutanol Production Considering Mixed Alcohols Synthesis Kinetics" published in Industrial and Engineering Chemistry Research, vol 56, pp 1543-1558 (2017). Four Aspen Plus V8.4 workbook files are provided AS IS, with no guarantee of accuracy or functionality. They are the original files used in the underlying work and have not been groomed or sanitized.

The four base cases considered in this study are:

1. A "biomass only" process in which the entire plant's energy supply comes from biomass.
2. A "biomass only" process that uses a divided wall column as a part of the distillation sequence
3. A "NG and power import" process in which natural gas and grid electricity are used to provide supplementary power.
4. A "NG import" case in which natural gas (but not grid... [more]
Aspen Plus Simulations of a Macroalgae-to-Biobutanol Thermochemical Process
Chinedu Okoli, Thomas A Adams II, Boris Brigljević, J. Jay Liu
July 2, 2021 (v1)
Keywords: Aspen Plus, Biobutanol, Biofuels, Butanol, Macroalgae, Seaweed, Thermochemical Route
Three Aspen Plus simulation files are presented which were used in the research paper by Chinedu Okoli, Thomas A. Adams II, Boris Brigljevic, and J.J. Liu: "Design and economic analysis of a macroalgae-to-butanol process via a thermochemical route" published in Energy Conversion and Management, vol 123, pp 410-122 (2016). Three Aspen Plus V8 workbook files are provided AS IS, with no guarantee of accuracy or functionality. They are the original files used in the underlying work and have not been groomed or sanitized.

The three files correspond to the three case studies in the paper:

1. A "biomass only" process in which the entire plant's energy supply comes from seaweed.
2. A "NG and power import" process in which natural gas and grid electricity are used to provide supplementary power.
3. A "NG import" case in which natural gas (but not grid electricity) is used to provide supplementary power.

It may be difficult to open the files in later versions of the software.... [more]
Design Strategies for Oxy-Combustion Power Plant Captured CO2 Purification
Ikenna J. Okeke, Tia Ghantous, Thomas A. Adams II
June 28, 2021 (v1)
Keywords: Aspen Plus, Carbon Dioxide Capture, CO2 Purification, Oxy-combustion, Petroleum Coke
This submission contains Aspen Plus files for the design and systems performance analysis of oxy-combustion power plant captured CO2 purification using different techniques.
Design, Overproduction and Purification of the Chimeric Phage Lysin MLTphg Fighting against Staphylococcus aureus
Feng Wang, Xiaohang Liu, Zhengyu Deng, Yao Zhang, Xinyu Ji, Yan Xiong, Lianbing Lin
June 29, 2021 (v1)
Subject: Biosystems
Keywords: antibiotic-resistant bacteria, antimicrobial drug, bacteriophage, bioengineering, biotechnology, endolysin, pathogen control, Staphylococcus aureus
With the increasing spread of multidrug-resistant bacterial pathogens, it is of great importance to develop alternatives to conventional antibiotics. Here, we report the generation of a chimeric phage lysin, MLTphg, which was assembled by joining the lysins derived from Meiothermus bacteriophage MMP7 and Thermus bacteriophage TSP4 with a flexible linker via chimeolysin engineering. As a potential antimicrobial agent, MLTphg can be obtained by overproduction in Escherichia coli BL21(DE3) cells and the following Ni-affinity chromatography. Finally, we recovered about 40 ± 1.9 mg of MLTphg from 1 L of the host E. coli BL21(DE3) culture. The purified MLTphg showed peak activity against Staphylococcus aureus ATCC6538 between 35 and 40 °C, and maintained approximately 44.5 ± 2.1% activity at room temperature (25 °C). Moreover, as a produced chimera, it exhibited considerably improved bactericidal activity against Staphylococcus aureus (2.9 ± 0.1 log10 reduction was observed upon 40 nM MLTphg... [more]
From Cardoon Lignocellulosic Biomass to Bio-1,4 Butanediol: An Integrated Biorefinery Model
Isabella De Bari, Aristide Giuliano, Maria Teresa Petrone, Giovanni Stoppiello, Vittoria Fatta, Cecilia Giardi, Francesco Razza, Alessandra Novelli
June 29, 2021 (v1)
Keywords: 2G sugars, BDO, bioeconomy, integrated biorefinery, lignocellulosic biomass
Biorefineries are novel, productive models that are aimed at producing biobased alternatives to many fossil-based products. Biomass supply and overall energy consumptions are important issues determining the overall biorefinery sustainability. Low-profit lands appear to be a potential option for the sustainable production of raw materials without competition with the food chain. Cardoon particularly matches these characteristics, thanks to the rapid growth and the economy of the cultivation and harvesting steps. An integrated biorefinery processing 60 kton/y cardoon lignocellulosic biomass for the production of 1,4-butanediol (bio-BDO) is presented and discussed in this work. After designing the biorefinery flowsheet, the mass and energy balances were calculated. The results indicated that the energy recovery system has been designed to almost completely cover the entire energy requirement of the BDO production process. Despite the lower supply of electricity, the energy recovery syste... [more]
Biosorption: A Review of the Latest Advances
Enrique Torres
June 29, 2021 (v1)
Subject: Materials
Keywords: bioaccumulation, biocomposite, Biomass, biosorption, dyes, emerging organic contaminants, metals, pollutants
Biosorption is a variant of sorption techniques in which the sorbent is a material of biological origin. This technique is considered to be low cost and environmentally friendly, and it can be used to remove pollutants from aqueous solutions. The objective of this review is to report on the most significant recent works and most recent advances that have occurred in the last couple of years (2019−2020) in the field of biosorption. Biosorption of metals and organic compounds (dyes, antibiotics and other emerging contaminants) is considered in this review. In addition, the use and possibilities of different forms of biomass (live or dead, modified or immobilized) are also considered.
Extreme Learning Machine Based on Firefly Adaptive Flower Pollination Algorithm Optimization
Ting Liu, Qinwei Fan, Qian Kang, Lei Niu
June 29, 2021 (v1)
Keywords: extreme learning machine, firefly algorithm, flower pollination algorithm, Optimization
Extreme learning machine (ELM) has aroused a lot of concern and discussion for its fast training speed and good generalization performance, and it has been used diffusely in both regression and classification problems. However, on account of the randomness of input parameters, it requires more hidden nodes to obtain the desired accuracy. In this paper, we come up with a firefly-based adaptive flower pollination algorithm (FA-FPA) to optimize the input weights and thresholds of the ELM algorithm. Nonlinear function fitting, iris classification and personal credit rating experiments show that the ELM with FA-FPA (FA-FPA-ELM) can obtain significantly better generalization performance (such as root mean square error, classification accuracy) than traditional ELM, ELM with firefly algorithm (FA-ELM), ELM with flower pollination algorithm (FPA-ELM), ELM with genetic algorithm (GA-ELM) and ELM with particle swarm optimization (PSO-ELM) algorithms.
Martensitic Transformation, Thermal Analysis and Magnetocaloric Properties of Ni-Mn-Sn-Pd Alloys
Asma Wederni, Mihail Ipatov, Eloi Pineda, Lluisa Escoda, Julian-Maria González, Mohamed Khitouni, Joan-Josep Suñol
June 29, 2021 (v1)
Subject: Materials
Keywords: entropic change, Heusler alloys, magneto-structural transition, magnetocaloric effect, martensitic transition
Martensitic transition and magnetic response of Ni50−x Pdx,y Mn36 Sn14−y (x = 0, 1, 2 and y = 0, 1) Heusler alloys were analysed. The crystalline structure of each composition was solved by X-ray diffraction pattern fitting. For x = 1 and 2, the L21 austenite structure is formed and, for y = 1, the crystallographic phase is a modulated martensitic structure. From differential scanning calorimetry scans, we determine characteristic transformation temperatures and the entropy/enthalpy changes. The temperatures of the structural transformation increase with the addition of Pd to replace Ni or Sn, whereas the austenitic Curie temperature remains almost unvarying. In addition, the magneto-structural transition, investigated by magnetic measurements, is adjusted by suitable Pd doping in the alloys. The peak value of the magnetic entropy changes reached 4.5 J/(kg K) for Ni50Mn36Sn13Pd1 (external field: 50 kOe).
Optimal Sizing of an Island Hybrid Microgrid Based on Improved Multi-Objective Grey Wolf Optimizer
Wenqiang Zhu, Jiang Guo, Guo Zhao, Bing Zeng
June 29, 2021 (v1)
Keywords: energy management, grey wolf optimizer, hybrid energy system, island microgrid, sizing optimization, tidal current energy
The hybrid renewable energy system is a promising and significant technology for clean and sustainable island power supply. Among the abundant ocean energy sources, tidal current energy appears to be very valuable due to its excellent predictability and stability, particularly compared with the intermittent wind and solar energy. In this paper, an island hybrid energy microgrid composed of photovoltaic, wind, tidal current, battery and diesel is constructed according to the actual energy sources. A sizing optimization method based on improved multi-objective grey wolf optimizer (IMOGWO) is presented to optimize the hybrid energy system. The proposed method is applied to determine the optimal system size, which is a multi-objective problem including the minimization of annualized cost of system (CACS) and deficiency of power supply probability (DPSP). MATLAB software is utilized to program and simulate the hybrid energy system. Optimization results confirm that IMOGWO is feasible to opt... [more]
5-Fluorouracil Loaded Biogenic and Albumin Capped Gold Nanoparticles Using Bacterial Enzyme—In Vitro-In Silico Gastroplus® Simulation and Prediction
Wael A. Mahdi, Afzal Hussain, Mohd. Ramzan
June 29, 2021 (v1)
Subject: Biosystems
Keywords: 5-fluorouracil, albumin capping, biogenic gold nanoparticles, hemocompatible, in silico GastroPlus® simulation and prediction, MCF-7 cell lines
The study investigated in situ biosynthesis of albumin capped 5-fluorouracil (5-FU) loaded gold nanoparticles (NPs) using bacterial extract for enhanced efficacy against MCF-7 and in silico prediction using a GastroPlus® software. The optimized formulations were characterized for morphology, size, zeta potential, drug loading (%DL) and entrapment (), compatibility, in vitro drug release, in vitro hemolysis, cellular toxicity and apoptosis studies. The results exhibited highly dispersed albumin capped mono-metallic stable NPs. Spherical size, negative zeta potential and polydispersity index were in range of 38.25−249.62 nm, 18.18−29.87 mV and 0.11−0.283, respectively. F11, F7 and F3 showed a progressive increase in %DL and with increased concentration of the cellular lysate (100% > 50% > 10%). The drug release was relatively extended over 48 h as compared to drug solution (96.64% release within 5 h). The hemolysis result ensured hemocompatibility (<14%) at the explored concentration.... [more]
Volatile Fatty Acids and Biomethane Recovery from Thickened Waste Activated Sludge: Hydrothermal Pretreatment’s Retention Time Impact
Farokh laqa Kakar, Ahmed El Sayed, Neha Purohit, Elsayed Elbeshbishy
June 29, 2021 (v1)
Keywords: anaerobic digestion, biomethane, hydrothermal pretreatment, thickened waste activated sludge, volatile fatty acids
The main objective of this study was to evaluate the hydrothermal pretreatment’s retention time influence on the volatile fatty acids and biomethane production from thickened waste activated sludge under mesophilic conditions. Six different retention times of 10, 20, 30, 40, 50, and 60 min were investigated while the hydrothermal pretreatment temperature was kept at 170 °C. The results showed that the chemical oxygen demand (COD) solubilization increased by increasing the hydrothermal pretreatment retention time up to 30 min and stabilized afterwards. The highest COD solubilization of 48% was observed for the sample pretreated at 170 °C for 30 min. Similarly, the sample pretreated at 170 °C for 30 min demonstrated the highest volatile fatty acids yield of 14.5 g COD/Lsubstrate added and a methane yield of 225 mL CH4/g TCODadded compared to 4.3 g COD/Lsubstrate added and 163 mL CH4/g TCODadded for the raw sample, respectively. The outcome of this study revealed that the optimum conditio... [more]
Whispering-Gallery-Mode for Coherent Random Lasing in a Dye-Doped Polystyrene Encapsulated Silica-Glass Capillary
Kai Nie, Yueqi Wang, Zhenzhen Zhang, Gang Zou, Xiaolong Xu, Zhijia Hu, Qijin Zhang
June 29, 2021 (v1)
Subject: Other
Keywords: coherent random lasing (RL), random lasers, whispering gallery modes
Dye-doped polystyrene (DDPS) encapsulated in a silica-glass capillary with a diameter of 300 μm was fabricated through radical polymerization of styrene within the capillary. The coherent random lasing (RL) with full width at half maximum (FWHM) of 0.36 nm and a quality factor of 1608 was produced in the DDPS with the capillary when pumping at 532 nm. However, the incoherent RL with FWHM of 6.62 nm and a quality factor of 92 was produced in the DDPS without the capillary. A detailed investigation on this phenomenon by changing the diameter of the capillary and core refractive index (RI) reveals that there exists a strong whispering gallery mode (WGM) resonance in the capillary, which helps generate the coherent RL. The findings may open up a new approach for the fabrication of highly efficient photonic devices.
Development and Testing of a Block Hydrocyclone
Alexandr Repko, Milan Sága, Boris Sentyakov, Vladislav Sviatskii
June 29, 2021 (v1)
Keywords: block hydrocyclone, filter, filtration unit, flow hydrodynamics, screw swirler, swirl unit
The study aimed to theoretically substantiate the efficiency of liquid purification and obtain corroborating experimental data for a hydrocyclone, consisting of several blocks. Mathematical models of the process of hydrodynamic fluid filtration were developed with the use of screw swirlers. The obtained mathematical models characterize all the main processes of fluid movement in various zones of the functioning of the hydrocyclone. Formulas for calculating the structures of hydrocyclone blocks are included. A block for swirling the flow of the liquid to be cleaned has been made in the form of a three-way screw. For the first time, wear-resistant and high-strength plastic ZEDEX ZX-324 has been used as a material. An experimental study was conducted and the change in the Reynolds number and the coefficient of fluid consumption was shown, using different constructions of the three-way screw. The research results confirmed the correctness and sufficiency of mathematical models for the deve... [more]
Showing records 201 to 225 of 798. [First] Page: 5 6 7 8 9 10 11 12 13 Last
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