Article
Engineering, Chemical
Hasan Hasan, Salih Alsadaie, Mudhar A. Al-Obaidi, Iqbal M. Mujtaba
Summary: The Multistage Flash (MSF) desalination process is still dominant for producing high quality freshwater in the Gulf region. The challenge is to ensure profitability of such processes. This study develops a detailed dynamic model for the MSF process and investigates its behavior under disturbances. The simulation results indicate that the last stage requires more time to settle and steam temperature has insignificant influence on performance compared to other factors. Additionally, productivity can increase in winter at the expense of lower performance ratio due to increased steam consumption.
Article
Engineering, Chemical
Junxin Chen, Caijin Zhou, Bingqi Xie, Jisong Zhang
Summary: In this study, a novel design of a tube-in-tube microextractor relying on a poly tetra fluoroethylene membrane to construct a stable interface was proposed for continuous counter-current extraction. The extraction kinetics and efficiency were measured for different systems and flow rate ratios, and a mathematical model was established to predict the results. The experimental and predicted results showed good agreement, demonstrating the applicability and effectiveness of the proposed microextractor.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Z. Gamino-Arroyo, D. Pareau, A. Buch, F. I. Gomez-Castro, L. E. Sanchez-Cadena, M. Stambouli, J. El Bekri, M. Avila-Rodriguez
Summary: This study focuses on the extraction and recovery of gold and silver from thiourea acid leaching ore liquors. By using specific chemical substances for extraction and selective stripping, efficient metal recovery can be achieved. The results show that this approach is more sustainable and economically viable compared to traditional methods.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Biotechnology & Applied Microbiology
Zhe Li, Hancheng Lu, Zixuan Zhang, Baoqing Liu
Summary: The scale-up technology of anaerobic fermentation stirring equipment was studied using computational fluid dynamics (CFD) simulations under different solid content conditions. The applicability of different scale-up criteria, such as blade tip speed and Reynolds number, was analyzed and optimized. The results showed that when the solid content is less than 5%, scaling up according to the same Weber number is recommended. When the solid content is between 5% and 10%, scaling up based on the same blade tip speed is suitable, especially for conditions with limited shear rate. Scaling up according to the Reynolds number was not recommended due to poor mixing effect. The suitable scale-up indices for 5%, 10%, and 15% solid content in anaerobic fermentation systems were found to be 1.1, 1, and 0.75, respectively.
FERMENTATION-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Dominic Maertens, Koen Binnemans, Thomas Cardinaels
Summary: Annular centrifugal contactors (ACCs) are efficient in counter-current multistage solvent extraction (SX) due to their high throughput, short residence times, and small footprint. However, the availability of commercial laboratory-scale ACCs is limited, and their designs lack flexibility. In this study, customized transparent ACCs were used to monitor the process and identify operational issues. The modified ACCs demonstrated improved performance in a uranium-TBP SX process.
SOLVENT EXTRACTION AND ION EXCHANGE
(2023)
Article
Mechanics
Carlos A. Galeano-Rios, Radu Cimpeanu, Isabelle A. Bauman, Annika MacEwen, Paul A. Milewski, Daniel M. Harris
Summary: This study investigates the phenomenon of a millimetre-size superhydrophobic sphere impacting on a quiescent bath, where it can be propelled back into the air while transferring energy to the fluid. Different physical parameters are explored to understand the dependence of rebound behavior, and various models are developed to explain the observed trends. The experiments, simulations, and models provide insights into the complex multi-scale system and reveal new phenomena at different ends of the Weber number spectrum.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Analytical
Nuria Fontanals, Eva Pocurull, Francesc Borrull, Rosa Maria Marce
Summary: Pressurized liquid extraction (PLE) is a widely used extraction technique for determining contaminants in environmental solid samples. Clean-up strategies are essential to remove interferences and avoid matrix effects. Different clean-up strategies have been used in PLE over the past 10 years, and this review critically discusses their strengths and weaknesses to help readers select the most suitable technique for a specific environmental analytical problem.
TRENDS IN ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Lucas Henrique Figueiredo Prates, Maximilian Merlau, Johanna Ruehl-Teichner, Marc F. F. Schetelig, Irina Haecker
Summary: Double-stranded RNA (dsRNA) is a natural defense mechanism that can silence specific genes through RNA interference (RNAi). It has potential as a sustainable and ecofriendly alternative for pest control and disease vector management. However, cost-efficient production of dsRNA is needed for further research and development. In this study, we optimized an acidic phenol-based protocol for low-cost extraction of dsRNA from bacteria, with high yield and no viable bacterial cells remaining in the purified dsRNA. Comparative assessments confirmed the cost-efficiency of our optimized protocol.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Chemical
Artak E. Kostanyan, Vera V. Belova, Yulia V. Tsareva, Maria M. Petyaeva
Summary: The application of liquid-liquid chromatography principles simplifies rare earth metal separation in hydrometallurgical solvent extraction processes. Experimental studies were conducted on the chromatographic separation of rare earth elements in multistage extraction columns under various loading conditions. The feasibility of operating sieve plate extraction columns in liquid-liquid chromatography mode was confirmed, and a closed-loop recycling technology was proposed for this separation process. Further experimental studies and computer simulations are needed to develop and implement this technology on intensified multistage extraction columns.
Article
Food Science & Technology
Zhixuan Tang, Jiangbing Qiu, Guixiang Wang, Ying Ji, Philipp Hess, Aifeng Li
Summary: This study compared various liquid-liquid extraction (LLE) treatments to optimize the harvesting of GYM-A from Karenia selliformis cultures, highlighting the effectiveness of LLE over filtration and centrifugation methods. It was found that GYM-A degraded significantly in alkaline culture media but remained stable in acidic conditions, demonstrating the importance of pH in toxin stability. The developed LLE method allows for efficient extraction of GYM-A from large-volume cultures, providing a valuable technique for harvesting toxins from GYM-producing microalgae.
Review
Thermodynamics
Steven B. Beale, Martin Andersson, Carlos Boigues-Munoz, Henrik L. Frandsen, Zijing Lin, Stephen J. McPhail, Meng Ni, Bengt Sunden, Andre Weber, Adam Z. Weber
Summary: Solid oxide cells are a promising technology for energy conversion, capable of converting hydrogen-rich fuels into electrical energy or storing energy from transient resources. To compete in the market, improving reliability, extending product lifecycles, and reducing costs are essential. Mathematical models provide insights into physical phenomena and performance, but accurate parameterization and validation through experimental methods are crucial for model reliability.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Marjeta Mencin, Maja Mikulic-Petkovsek, Robert Veberic, Petra Terpinc
Summary: A solid-phase extraction (SPE) technique was developed and optimised for isolation and concentration of extractable and bound phenolic acids from germinated spelt seeds, for analysis by liquid chromatography-mass spectrometry. The study found that this method has significant advantages over traditional liquid-liquid extraction in terms of higher extraction efficiencies and can be used for quantitative analysis of extractable and bound phenolic acids.
Article
Computer Science, Interdisciplinary Applications
Ugur G. Abdulla, Roby Poteau
Summary: A numerical method for identifying parameters in large-scale systems of nonlinear ODEs in systems biology is introduced, combining optimization, sensitivity analysis, and regularization. The method demonstrates superlinear convergence in testing on canonical benchmark models, making it suitable for partial and noisy measurements. The developed software package qlopt shows advantages over popular methods/software like lsqnonlin, finincon, and nl2sol.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Food Science & Technology
Gabor Endre, Babett Edit Nagy, Daniel Hercegfalvi, Csenge Kasuba, Csaba Vagvolgyi, Andras Szekeres
Summary: Aflatoxins (AFs) are secondary metabolites that cause diseases in animals and humans. Regulations set concentration limits for AFs in EU food and feed products, requiring pure forms for reference standards. Improvements were made to a liquid-liquid chromatographic method to enhance purification and increase the yield of pure AFs. Through a scale-up process, approximately 2.2 g of AFs could be purified using 8.2 L of solvent in a 250 mL rotor, while 7.8 g of AFs could be prepared using 31 L of solvent in a 1000 mL rotor.
Article
Food Science & Technology
Danyang Qin, Yuanlong Wang, Yuntao Wu, Xingjian Kong, Lei Liu, Zongming Li, Jun Xi
Summary: The study focused on extracting watermelon seeds protein using specific energy per pulse (EPP) as the operation parameter, comparing it with the extraction based on discharge voltage for optimization by liquid-phase pulsed discharge. Results showed that EPP optimization was more reliable and feasible at larger scales, indicating its superiority over traditional optimization based on discharge voltage.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Tanase Dobre, Laura Ruxandra Zicman, Oana Cristina Parvulescu, Elena Neacsu, Catalin Ciobanu, Felicia Nicoleta Dragolici
ENVIRONMENTAL POLLUTION
(2018)
Article
Engineering, Chemical
Tanase Dobre, Oana Cristina Parvulescu, Mariana Popescu, Anicuta Stoica-Guzun, Andreea Cozea
JOURNAL OF FOOD ENGINEERING
(2018)
Article
Engineering, Chemical
Gabriela Isopencu, Marta Stroescu, Alma Brosteanu, Nicoleta Chira, Oana Cristina Parvulescu, Cristina Busuioc, Anicuta Stoica-Guzun
JOURNAL OF FOOD PROCESS ENGINEERING
(2019)
Article
Chemistry, Multidisciplinary
Andreea D. Dima, Carmen Mateescu, Oana C. Parvulescu, Eduard M. Lungulescu, Nicoleta O. Nicula
Article
Materials Science, Paper & Wood
Doinita R. Cioroiu Tirpan, Claudia Koncsag, Alina G. Ciufu, Oana C. Parvulescu, Tanase Dobre
CELLULOSE CHEMISTRY AND TECHNOLOGY
(2019)
Article
Chemistry, Multidisciplinary
Alina Georgiana Ciufu, Ali A. Abbas Al Janabi, Oana Cristina Parvulescu, Tanase Dobre, Cristian Raducanu
Article
Chemistry, Multidisciplinary
Laura Ruxandra Zicman, Elena Neacsu, Felicia Nicoleta Dragolici, Catalin Ciobanu, Gheorghe Dogaru, Oana Cristina Parvulescu, Tanase Dobre
Article
Chemistry, Multidisciplinary
Doinita Roxana Cioroiu, Oana Cristina Parvulescu, Tanase Dobre, Cristian Raducanu, Claudia Irina Koncsag, Alexandra Mocanu, Narcis Duteanu
Article
Chemistry, Multidisciplinary
Doinita-Roxana Cioroiu, Oana Cristina Parvulescu, Claudia Irina Koncsag, Tanase Dobre
UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE
(2017)
Article
Chemistry, Multidisciplinary
Bogdan Trica, Oana Cristina Parvulescu, Tanase Dobre, Ali A. A. Al Janabi, Cristian Raducanu, Claudia Patrichi
Article
Chemistry, Multidisciplinary
Cristina Orbeci, Oana Cristina Parvulescu, Elena Acceleanu, Tanase Dobre
Article
Chemistry, Multidisciplinary
Doinita Roxana Cioroiu, Oana Cristina Parvulescu, Claudia Irina Koncsag, Tanase Dobre, Cristian Raducanu
Article
Chemistry, Multidisciplinary
Ali A. A. Al Janabi, Oana Cristina Parvulescu, Bogdan Trica, Tanase Dobre
Article
Food Science & Technology
Anicuta Stoica-Guzun, Oana Cristina Parvulescu, Alma Brosteanu, Nicoleta Chira, Marta Stroescu, Tanase Dobre
JOURNAL OF FOOD AND NUTRITION RESEARCH
(2018)
Article
Biotechnology & Applied Microbiology
Mohamad Rais Hasan, Che Azurahanim Che Abdullah, Mustapha Nor Afizah, Mohd Sabri Mohd Ghazali, Mohd Adzahan Noranizan
Summary: This study evaluates the efficacy of ultrasound in the extraction process of calcium hydroxyapatite (HAp). The findings show that low-intensity and moderate-intensity ultrasonication reduce the whiteness index and yield of HAp, while high-intensity ultrasonication reduces particle size and improves crystallinity.
FOOD AND BIOPRODUCTS PROCESSING
(2024)
Article
Biotechnology & Applied Microbiology
Barbara Flaibam, Rosana Goldbeck
Summary: This study evaluated the possibility of extracting proteins and obtaining hydrolysates from non-animal agro-industrial waste using enzymes for the production of cultured meat inputs. Results showed that the application of enzymes can maximize the use of protein from these wastes, providing a low-cost and environmentally friendly route with nutritional potential for cultured meat.
FOOD AND BIOPRODUCTS PROCESSING
(2024)
Article
Biotechnology & Applied Microbiology
Robson Costa de Sousa, Ariany Binda Silva Costa, Marcos Daniel Martins Freitas, Maisa Tonon Bitti Perazzini, Hugo Perazzini
Summary: This study investigated the drying kinetics of black pepper through experimental and mathematical modeling approaches. The models developed provided valuable insights into the coupling between heat and mass transfers during the drying process, and accurately described the drying behavior of black pepper.
FOOD AND BIOPRODUCTS PROCESSING
(2024)
Article
Biotechnology & Applied Microbiology
Ali Nikkhah, Hasan Nikkhah, Amir Shahbazi, Mona Kamelan Zargar Zarin, Duygu Beykal Iz, Mohammad-Taghi Ebadi, Mohammad Fakhroleslam, Burcu Beykal
Summary: Cumin and eucalyptus essential oils were enriched to meet ISO standards using a dynamic fractional distillation process. The optimization results showed low operating costs and potential for improving process efficiency.
FOOD AND BIOPRODUCTS PROCESSING
(2024)
Article
Biotechnology & Applied Microbiology
Sakshi Gupta, Gargi Ghoshal
Summary: A study was conducted to prepare green gram protein hydrogel enriched with curcumin and evaluate its physicochemical properties. The results showed that the hydrogel had high encapsulation efficiency, swelling capacity, and antioxidant property. Furthermore, applying the hydrogel as a coating on tomatoes and apples proved to be effective.
FOOD AND BIOPRODUCTS PROCESSING
(2024)
Article
Biotechnology & Applied Microbiology
Calvin Lo, Rene H. Wijffels, Michel H. M. Eppink
Summary: This study developed a novel strategy to separate dissolved oils from imidazole/hexanoic acid mixture and regenerate the solvent using polar antisolvents. By adding small amounts of water and methanol, high recovery of lipids was achieved, while ethanol required a large amount and caused solvent dilution.
FOOD AND BIOPRODUCTS PROCESSING
(2024)
Article
Biotechnology & Applied Microbiology
Manoj Sawale, Patnarin Benyathiar, Pablo Coronel, Ajay Rawat, Josip Simunovic, Ferhan Ozadali, Dharmendra K. Mishra
Summary: Microwave and ohmic heating are popular choices for aseptic processing due to their rapid heating capabilities and better product quality. This study aims to find an alternative approach to simulate processing conditions by modeling and validating the process using surrogate particles and microorganisms. A mathematical model was used to simulate heat transfer in fluid and solid particles. The process was validated using simulated particles and surrogate microorganisms, with magnetic implants in spherical particles to measure residence time distribution. The microwave aseptic system was successfully validated for producing shelf-stable particulate food products.
FOOD AND BIOPRODUCTS PROCESSING
(2024)
