Article
Chemistry, Physical
Gerardo Joaquin Tita, Alexander Navarrete, Angel Martin, Maria Jose Cocero
Summary: This study investigated the supercritical fluid extraction of valuable compounds such as solanesol and nicotine from tobacco scrap, as well as the fractionation of these compounds by liquid-liquid extraction. The results show that different extraction conditions are needed for optimizing solanesol yield and selectivity compared to nicotine extraction, with the best results obtained when extraction was controlled by solubility parameters. This research provides guidance for the valorization of residues from the tobacco industry.
JOURNAL OF SUPERCRITICAL FLUIDS
(2021)
Article
Chemistry, Physical
Andrea Natolino, Carla Da Porto, Mario Scalet
Summary: The use of broken and intact cell models to fit experimental data revealed that pressure has a significant impact on extraction rate, while temperature has a minor effect on extraction kinetics. The mass transfer coefficients in different phases varied within specific ranges, with a maximum average deviation of 4.1% between measured and calculated oil yield. The highest extraction yield was achieved at 300 bar and 40 degrees C, with tea seed oil extracted using SC-CO2 showing higher antioxidant capacity and lower UV indices compared to oil extracted with n-hexane.
JOURNAL OF SUPERCRITICAL FLUIDS
(2022)
Article
Chemistry, Analytical
Binhong He, Jieqing Feng, Jiaqi Liu, Qisheng Zhong, Ting Zhou
Summary: In this study, a new integrated method was developed using the phase transition trapping strategy and adsorbents, which could analyze low abundance and multiple categories of targets in complex samples. This method improved sensitivity, reduced matrix effects, and had advantages in automation and efficiency.
ANALYTICA CHIMICA ACTA
(2023)
Review
Chemistry, Analytical
Mohammad Yousefi, Mehdi Rahimi-Nasrabadi, Somayeh Mirsadeghi, Seied Mahdi Pourmortazavi
Summary: This study focuses on the extraction, separation, and determination of pesticide and insecticide residues in food and plant samples, highlighting the use of supercritical fluid extraction (SFE) and discussing parameters such as temperature and pressure that affect pesticide extraction. The study also emphasizes the importance of insecticide extraction as a subset of pesticides, and showcases innovations in the field of SFE of pesticide and insecticide residues from foodstuff and plants.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Paula Pereira, Elisabete Muchagato Mauricio, Maria Paula Duarte, Katelene Lima, Ana S. Fernandes, Gabriela Bernardo-Gil, Maria-Joao Cebola
Summary: This study investigated the use of myrtle extract obtained by supercritical fluid extraction as an antimicrobial ingredient in cosmetics and pharmaceuticals. Results showed that the extract exhibited good antibacterial activity and some antifungal activity. Cell viability studies and mutagenicity assays also showed that the extract was safe and could reduce genotoxic damage induced by reactive oxygen species.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Chemistry, Physical
Larry Oscar Chani-Paucar, Julio Cezar Flores Johner, Giovani L. Zabot, Maria Angela A. Meireles
Summary: The supercritical CO2 extraction of sucupira branca (SB) seeds was studied under various pressure and temperature conditions, revealing that the optimum conditions yielded 40 g oil per 100 g SB seeds at 40 degrees Celsius and 30 MPa. Economic and technical analyses showed that a plant with two 15 L extractors is more convenient than a plant with one 30 L extractor, resulting in lower manufacturing cost and higher productivity.
JOURNAL OF SUPERCRITICAL FLUIDS
(2022)
Article
Biochemical Research Methods
Qing Fu, Wenwen Dong, Dandan Ge, Yanxiong Ke, Yu Jin
Summary: This study developed a method based on simultaneous supercritical fluid extraction-sample cleanup, followed by supercritical fluid chromatography/tandem mass spectrometry (SFE-SFC-MS/MS) for the extraction and analysis of alkaloids, specifically indole alkaloids of Uncaria rhynchophylla. By using a two-step SFE method with the addition of adsorbents, the specificity of extraction towards alkaloids was greatly improved. The SFE extract was then analyzed using SFC-MS/MS, and the results confirmed the presence of indole alkaloids. This method is important for the study of alkaline compounds in complex samples.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Biotechnology & Applied Microbiology
Maria J. Jimenez Callejon, Alfonso Robles Medina, Maria D. Macias Sanchez, Pedro A. Gonzalez Moreno, Elvira Navarro Lopez, Luis Esteban Cerdan, Emilio Molina Grima
Summary: This study investigates the extraction and fractionation of saponifiable lipids from Nannochloropsis sp. microalgae using green techniques. The research successfully obtained extracts rich in neutral saponifiable lipids and polar lipids, with high levels of EPA in the polar lipid fraction.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Review
Energy & Fuels
Sreya Sarkar, Kalyan Gayen, Tridib Kumar Bhowmick
Summary: Biomolecules present in algae, such as carbohydrates, proteins, pigments, and lipids, have wide applications in various industries. Supercritical fluid extraction (SFE) and subcritical water extraction (SWE) are considered as sustainable and promising green extraction technologies for extracting valuable bioactive molecules from algae. This review discusses the extraction of biomolecules using SFE and SWE techniques, the improvement of these technologies, and the challenges and perspectives in their use on algae.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Ana de Souza, Gustavo Santos, Artur Bispo, Katharine Hodel, Bruna Machado, Douglas Chaves, Marisa Mendes, Fernando Pessoa
Summary: This study evaluated the technical and economic feasibility of using supercritical CO2 extraction for the production of bioactive compounds from Schinus terebinthifolius. The results showed that higher pressures and temperatures can increase the yield of bioactive compounds from the extract, which demonstrated significant potential in terms of their antioxidant and antimicrobial properties. The economic evaluation revealed that the extraction process is economically viable.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Gönül Serdar, Gülsah Gül Kilinc
Summary: In this study, metallic gold nanoparticles (AuNPs) were prepared from green tea extract and catechin extract using microwave extraction. The optimal conditions for synthesis were determined using UV-Visible spectroscopy. Characterization of the AuNPs was done using various techniques including TEM, XRD, FT-IR, and Zetasizer. The resulting AuNPs exhibited stable properties and were stored in the refrigerator for 1.5 to 2 months.
Article
Agricultural Engineering
Jiawei Hong, Meifeng Deng, Longshan Zhao
Summary: In this study, ultrasound-assisted natural deep eutectic solvent (NADES) extraction was used to extract solanesol in tobacco leaves. The optimal conditions for extraction were determined, and the extraction mechanism was elucidated using FT-IR and SEM. The method developed in this study can effectively extract solanesol from waste tobacco leaves and has potential applications in the food and pharmaceutical industries.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Biochemistry & Molecular Biology
Olga Wrona, Katarzyna Rafinska, Aneta Krakowska-Sieprawska, Boguslaw Buszewski
Summary: The research focused on the optimization criteria for supercritical carbon dioxide extraction of alfalfa, examining the relationship between general output like total phenolics and flavonoids content, and specific polar constituents. Analysis of bioactive compounds in alfalfa extracts revealed the presence of eight specific phenolic acids and nine flavonoids, with certain compounds showing similar optimal conditions for extraction based on total flavonoid content.
Article
Biochemistry & Molecular Biology
Renata Baranauskiene, Petras Rimantas Venskutonis
Summary: The study developed a method for extracting fragrance substances from Narcissus poeticus using pure supercritical CO2 and a mixture of CO2 with 5% ethanol. The results showed that the extracts contained various volatile compounds, including benzyl benzoate, alpha-terpineol, and limonene. The findings are significant for the further extraction of fragrance substances from Narcissus poeticus using supercritical CO2.
Article
Food Science & Technology
Supriya Priyadarsani, Avinash Singh Patel, Yogesh Sharma, Abhijit Kar
Summary: A quick, simple, and reliable isocratic ultra-performance supercritical fluid chromatography-photodiode array detector (UPSFC-DAD) method was developed and validated to determine lycopene in different horticultural products. The method showed successful separation and quantification of lycopene with good reproducibility and sensitivity under optimized conditions.
Article
Chemistry, Physical
P. Belmonte, J. M. Garcia-Vargas, J. F. Rodriguez, I. Garrido, M. T. Garcia, M. J. Ramos
Summary: In this study, four polythiourethane films with different types of polyols and isocyanates were synthesized, characterized, and foamed. The results showed that the type of isocyanate greatly influenced the crystallinity and stiffness of the polymers, while the type of polyol modified the FT-IR spectra and the decomposition curve of the material with temperature. Furthermore, the choice of isocyanate also affected the properties of the foams obtained from the polymeric material.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Xutao Zhu, Jianguo Yan, Shouchun Liu, Fengling Zhu
Summary: This study experimentally assessed the hydrodynamic characteristics of supercritical-pressure R134a in a horizontal circular tube. It was found that the hydrodynamic characteristic curve of R134a under supercritical pressure does not have a negative-slope region but a transition region. The transition region becomes more evident with increasing heat flux, while it weakens with increasing pressure and inlet temperature. Moreover, the onset of the transition region shifts in the direction of high mass flow rate with increasing heat flux.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Stefania Mottola, Iolanda De Marco
Summary: In this study, corticosteroids were micronized with cyclodextrin using Supercritical Assisted Atomization (SAA), resulting in spherical micrometric particles with improved dissolution time.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Honghai Liu, Yu Xie, Zhilan Li, Xiaokai Zhang
Summary: This study compared the effects of supercritical carbon dioxide dewatering (SCD) and conventional kiln drying (CKD) at a temperature of 55 degrees C on the dewatering rate, moisture transfer and distribution, shrinkage, and stress characteristics of bamboo strips. The results showed that SCD had a faster dewatering rate and lower shrinkage compared to CKD, but was less effective in reducing drying stress in bamboo.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tahmasb Hatami, Ozan N. Ciftci
Summary: This study fills the gap in previous research by establishing a hierarchy of significance for factors affecting SFE profitability, providing a deeper understanding of how technical and economic factors impact profitability. The findings highlight that the SFE facility becomes profitable when the extractor capacity surpasses 42 L.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tingshan Guo, Chuang He, Zhiyuan Liang, Qinxin Zhao
Summary: The initial oxidation behavior of Fe10Cr and Fe20Cr alloys in supercritical H2O and supercritical CO2 with O2 has been investigated. The results show that O2 has the highest adsorption energy on FeCr alloys and reacts faster than H2O and CO2.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Vikash Chandra Roy, Jin-Seok Park, Ahmed Redwan Haque, Md Sadek Ali, Hee-Jeong Lee, Byung-Soo Chun
Summary: This research aimed to valorize brewery spent grain (BSG) using subcritical water hydrolysis (SWH) modified by six different natural deep eutectic solvents (DES) and determining their bipotentialities. The findings showed that BSG hydrolysates obtained through DES-induced SWH contained high levels of sugars, proteins, flavonoids, phenolic compounds, and essential amino acids. The hydrolysates also demonstrated antimicrobial activities, and the presence of bioactive compounds was confirmed through FT-IR analysis. This comprehensive profiling of bioactive compounds from BSG using DES-mediated SWH can contribute to the efficient valorization of BSG for industrial purposes.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Kailiang Zhang, Hanyu Wang, Tong Liu, Zhu Wang, Lvxing Wang, Ping Fan, Feng Chen, Mingqiang Zhong, Bozhen Wu, Shanqiu Liu, Jintao Yang
Summary: This study investigates the influence of foam cell structure on the electromagnetic interference shielding performance of conductive polymer composite foam. The results suggest that foamed composites exhibit improved EMI shielding performance, and bimodal cell foams have higher electric conductivity but lower EMI shielding compared to uniform cell foams.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Jaromir Valtr, Petr Roztocil, David Dasek, Radek Musalek, Frantisek Lukac, Jakub Klecka, Marek Janata, Mariana Arnoult-Ruzickova, Eva Mistova, Ludek Jelinek, Petr Sajdl, Jan Macak
Summary: This paper focuses on the design of an experimental facility for in-situ electrochemical testing at supercritical water conditions, including the design of the electrode system and surface insulation coating for electrode leads.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Richard Djimasbe, Mikhail A. Varfolomeev, Nailya M. Khasanova, Ameen A. Al-Muntaser, Rustam R. Davletshin, Muneer A. Suwaid, Gazinur Z. Mingazov
Summary: This study confirms the capability of supercritical water to generate active hydrogen that interacts with different fractions in unconventional feedstocks, leading to synthetic oil production during hydrothermal reactions. The findings suggest that a maximum yield of 16.78% can be achieved at a temperature of 380 oC and a reaction time of 1-12 hours.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
