Article
Agronomy
Bixia Wang, Shian Shen, Jipeng Qu, Zhou Xu, Shiling Feng, Tao Chen, Chunbang Ding
Summary: In this study, an optimal extraction method was developed to maximize the phenolic and oleuropein content in Chinese olive leaves. It was found that young leaves in spring and winter had higher levels of phenolic compounds, with strong antioxidant and anticancer activities. Oleuropein showed a higher antioxidant effect compared to the phenolic extract, with potential for further development and utilization of Chinese olive leaves as a source of biological substances.
Article
Chemistry, Multidisciplinary
Manel Elakremi, Leyre Sillero, Lazher Ayed, Mongi ben Mosbah, Jalel Labidi, Ridha ben Salem, Younes Moussaoui
Summary: This study investigated the extraction of bioactive compounds from pistachio leaves using microwave-assisted extraction (MAE). Response surface methodology (RSM) was used to optimize the extraction conditions. The results showed that MAE extracts had better antioxidant and antimicrobial activities compared to extracts obtained by maceration. UPLC-DAD-ESI-MS analysis confirmed the presence of phenolic compounds in the MAE extracts.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Agronomy
Eman A. Mohammed, Ismat G. Abdalla, Mohammed A. Alfawaz, Mohammed A. Mohammed, Salah A. Al Maiman, Magdi A. Osman, Abu ElGasim A. Yagoub, Amro B. Hassan
Summary: This study investigated the total phenolics, total flavonoids, and antioxidant activity of the aerial parts of onion, white radish, red radish, carrot, and beet. The results showed that these vegetables have high antioxidant properties, with root vegetables exhibiting particularly strong antioxidant capacity.
Article
Plant Sciences
Anica Bebek Markovinovic, Sanja Milosevic, Nemanja Teslic, Branimir Pavlic, Predrag Putnik, Irena Brcic Karaconji, Karlo Jurica, Dario Lasic, Danijela Bursac Kovacevic
Summary: The aim of this study was to develop a green extraction approach using pressurized liquid extraction (PLE) to obtain high yield of bioactive compounds from strawberry tree fruits. Different extraction solvents, temperatures, static extraction times, and number of cycles were investigated. The results showed that all bioactive compounds and antioxidant capacity were significantly affected by solvent type, temperature, static extraction time, and number of cycles. The optimal PLE parameters were 120 degrees C temperature, 10 min static extraction time, and 2 cycles. Most bioactive compounds were best extracted using 96% ethanol as solvent, except for total phenolic contents, which were better extracted using 50% ethanol.
Article
Green & Sustainable Science & Technology
Gabriela Silveira da Rosa, Thamiris Renata Martiny, Guilherme Luiz Dotto, Sai Kranthi Vanga, Debora Parrine, Yvan Gariepy, Mark Lefsrud, Vijaya Raghavan
Summary: The study demonstrates that green technologies are suitable for extracting bioactive compounds from Brazilian olive tree leaves, with microwave-assisted extraction being the most efficient method and oleuropein being the predominant phenolic compound in the extracts.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2021)
Article
Multidisciplinary Sciences
Norliza Abdul Latiff, Pei Ying Ong, Siti Nor Azlina Abd Rashid, Luqman Chuah Abdullah, Nor Amaiza Mohd Amin, Noor Akhmazillah Mohd Fauzi
Summary: Ultrasonic extraction method was used to optimize the recovery of bioactive compounds from Cosmos caudatus leaves, resulting in higher antioxidant activity and antimicrobial properties compared to the traditional Soxhlet method. The study highlights the potential of plant extracts for functional food and antimicrobial applications.
SCIENTIFIC REPORTS
(2021)
Review
Food Science & Technology
Sol Zamuz, Paulo E. S. Munekata, Beatriz Gullon, Gabriele Rocchetti, Domenico Montesano, Jose M. Lorenzo
Summary: This review focuses on the research conducted on watermelon phytochemicals, highlighting important biological activities observed in both in vitro and in vivo trials. Additionally, it discusses the potential utilization of watermelon by-products in the green circular economy and food-waste valorization.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2021)
Article
Food Science & Technology
Berna Goztepe, Selma Kayacan, Fatih Bozkurt, Merve Tomas, Osman Sagdic, Salih Karasu
Summary: The study found that freeze-dried samples had the highest antioxidant activity, while hot air dried samples had the lowest. Ultrasound-assisted vacuum drying had the least impact on drying time and color change of rosehip compared to vacuum drying and hot air drying.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Medicinal
Adane Tilahun Getachew, Susan Lovstad Holdt, Anne Strunge Meyer, Charlotte Jacobsen
Summary: This study investigated the effects of low polarity water (LPW) on the extraction of bioactive compounds from Fucus vesiculosus. It was found that the extraction yield and total phenolic content increased with increasing temperature. The extracts showed high antioxidant activity.
Review
Food Science & Technology
Nitin Mehta, S. Jeyapriya, Pavan Kumar, Akhilesh Kumar Verma, Pramila Umaraw, Sunil Kumar Khatkar, Anju Boora Khatkar, Devendra Pathak, Ubedullah Kaka, Awis Qurni Sazili
Summary: There is a rich potential of underutilized bioactive components in nature, and ultrasound-assisted extraction and encapsulation techniques have promising applications in the food industry to reduce costs, operational time, and energy consumption.
Article
Plant Sciences
Antonio Ruano-Gonzalez, Ana A. Pinto, Nuria Chinchilla, Miguel Palma, Gerardo F. Barbero, Ceferino Carrera, Mercedes Vazquez-Espinosa
Summary: This study identified the major phenolic compounds in tagarnina, including 5-caffeoylquinic acid (5-CQA) and 3,5-dicaffeoylquinic acid (3,5-diCQA). An ultrasound-assisted extraction method was developed to extract these compounds, with methanol percentage, sample-to-solvent ratio, and pH being the most influential factors. The concentration of 5-CQA and 3,5-diCQA in Scolymus hispanicus collected from six different locations in southern Spain was determined, and the antioxidant activity of the samples was correlated with their caffeoylquinic compound content, showing an antioxidant effect.
Article
Biochemistry & Molecular Biology
Pinderpal Kaur, Kawaljit Singh Sandhu, Sneh Punia Bangar, Sukhvinder Singh Purewal, Maninder Kaur, Rushdan Ahmad Ilyas, Muhammad Rizal Muhammad Asyraf, Muhammad Rizal Razman
Summary: Six different solvents were used to extract phenolics from two rye cultivars' flour, and the extracts were analyzed for phytochemicals and antioxidant properties. The presence of phenolic compounds, antioxidant capacity, and tannin content in the extracts indicates the potential medicinal importance of rye, which could be utilized in preparing antioxidant-rich health-benefiting food products.
Article
Biotechnology & Applied Microbiology
Giovanni Arneldi Sumampouw, Charlotte Jacobsen, Adane Tilahun Getachew
Summary: This study optimized pressurized liquid extraction of phenolic compounds from brown seaweed Fucus vesiculosus to obtain extracts with high yield and rich in phenolic compounds. The resulting extracts showed good radical scavenging and metal chelating ability, with similar effectiveness to conventionally extracted extracts.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Food Science & Technology
Mehdi Akbari, Seyed Hadi Razavi, Faramarz Khodaiyan, Jesus Blesa, Maria J. Esteve
Summary: This study evaluated the potential of solid-state fermentation with Lactobacillus reuteri and Lactobacillus plantarum for improving phenolic compounds and antioxidant activity in corn bran. The results showed that fermentation significantly increased the total phenolic content and antioxidant activity of the fermented samples. It also increased the concentration of free phenolic acids. Therefore, solid-state fermentation is an effective method for enhancing phenolic compounds and antioxidant activity.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Nokuthula Ndaba, Marthe Carine Djuidje Fotsing, Penny Poomani Govender
Summary: Drimia delagoensis has medicinal properties due to the presence of secondary metabolites in its bulb and leaves. The ethyl acetate extract showed the highest total phenolic content and exhibited strong antioxidant and free radical scavenging activity.
CHEMISTRY & BIODIVERSITY
(2023)
Article
Green & Sustainable Science & Technology
Elaine de Paula Witt, Gracielle Johann, Carina Contini Triques, Edson Antonio da Silva, Camila da Silva, Dionisio Borsato, Tatiana Rodrigues da Silva Baumgartner
Summary: The study evaluated the performance of pomegranate peel extract as a natural antioxidant for commercial biodiesel, showing its high antioxidant capacity and effectiveness in extending biodiesel stability. The extract, rich in squalene and alpha-tocopherol, was found to be a promising alternative to commercial synthetic antioxidants, meeting European standard EN 14214.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2022)
Article
Energy & Fuels
Jhessica M. Fonseca, Lucas Spessato, Andre L. Cazetta, Camila da Silva, Vitor de C. Almeida
Summary: Heterogeneous acid catalysts, such as sulfonated carbons, are potential substitutes for homogeneous catalysts in biodiesel production due to their ability to perform esterification and transesterification reactions simultaneously, ease of separation and recovery, and possible reuse in other cycles. The parameters of the sulfonation process directly affect the acid density and final biodiesel yield. Sulfonated carbons demonstrate similar or superior catalytic activity compared to other heterogeneous acid catalysts in synthesizing biodiesel from different oils.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Chemistry, Physical
Jessica Maria Ferreira de Almeida-Couto, Karen Keli Barbosa Abrantes, Natalia Stevanato, Wenes Ramos da Silva, Alberto Wisniewski Jr, Camila da Silva, Vladimir Ferreira Cabral, Lucio Cardozo-Filho
Summary: The study showed that using pressurized fluids to extract oil from defective coffee beans increased both the yield of oil and the content of certain nutrients. Adjusting the solvent flow rates and temperature can improve the extraction efficiency of oil, while lower extraction temperatures can increase the content of vitamin E.
JOURNAL OF SUPERCRITICAL FLUIDS
(2022)
Article
Energy & Fuels
Natalia Stevanato, Bruna Tais Ferreira de Mello, Marleny Doris Aranda Saldana, Lucio Cardozo-Filho, Camila da Silva
Summary: This study investigated the production of fatty acid ethyl esters from forage radish seeds using pressurized ethanol and ethyl acetate as solvents and acyl acceptors. The results showed that ethanol resulted in a high mass yield, while ethyl acetate retained proteins, phenolic compounds and sugars. In the sequential reaction, supercritical ethyl acetate at 300 degrees C provided the highest FAEE content.
Article
Chemistry, Physical
Najla Postaue, Carlos Eduardo Borba, Camila da Silva
Summary: This study investigated the sequential step of high pressure transesterification to obtain fatty acid esters. The extraction by pressurized liquid was performed and the resulting product was directly used in a reaction with different temperature and pressure conditions. High operating temperature (<300 degrees C) led to a reduction in fatty acid esters. At 10 MPa pressure, a high ester yield and low content of unreacted compounds were obtained. The proposed process showed potential applicability in preserving active compounds and providing high quality and stability.
JOURNAL OF SUPERCRITICAL FLUIDS
(2023)
Article
Chemistry, Multidisciplinary
Cristiane Giombelli, Djessica T. Raspe, Dayara B. S. Donadone, Camila da Silva, Beatriz C. B. Barros
Summary: The aim of this study was to produce and characterize dietary fiber concentrates (DFCs) obtained from the peach palm by-product (PPB). The DFCs were produced using subcritical water extraction (SWE) and aqueous extractions at low pressure in magnetic (LPMS) and orbital (LPOS) stirring. The analysis showed that the DFCs had increased total dietary fiber content and improved functional properties, making them potential alternatives to promote the utilization of peach palm by-product as a fiber-rich component.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Thainara B. Massa, Djessica T. Raspe, Mirian C. Feiten, Lucio Cardozo-Filho, Camila da Silva
Summary: This review focuses on the characteristics and applications of fusel oil (FO) as a source for ester production, as well as its addition to fossil fuels and its potential in herbicides and fungicides. The operating conditions, experimental results, and patented applications in various sectors are discussed, along with suggestions for overcoming the drawbacks and developing new research in this area.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
Article
Biochemistry & Molecular Biology
Livia Silva Mateus, Juliete Martins Dutra, Rogerio Favareto, Edson Antonio da Silva, Leandro Ferreira Pinto, Camila da Silva, Lucio Cardozo-Filho
Summary: This study extracts pequi almond oil using supercritical CO2 and determines the optimal extraction conditions. The fatty acids and active compounds in the oil are characterized.
Article
Green & Sustainable Science & Technology
Meline Gurtat Porcel, Bruna Tais Ferreira de Mello, Helton Jose Alves, Ricardo Schneider, Camila da Silva, Carlos Eduardo Borba
Summary: The use of heterogeneous catalysts in the transesterification process under pressurized conditions can minimize the operation temperature, making it more viable. This study aimed to determine the optimal synthesis condition of a catalyst based on KF and glass waste for transesterification in a continuous reactor under pressurized media. A central composite rotational design was used, and the catalyst's mass ratio and calcination temperature were varied. The results showed that the KF/WGP catalyst had the potential to produce esters in continuous flow under pressurized conditions, with a high ethyl ester content and low potassium leaching.
Article
Biotechnology & Applied Microbiology
Thainara Bovo Massa, Lucio Cardozo-Filho, Camila da Silva
Summary: This study investigated the reaction of fusel oil (FO) with pressurized water in a continuous flow reactor to understand the effects of operating conditions on reaction products formation and antimicrobial activity. FO composition was characterized using high resolution mass spectrometry and gas chromatography coupled mass spectrometry, and reaction products were evaluated for antifungal potential. Results showed that FO mainly consisted of isoamyl alcohol and organic functions like alcohols, aldehydes, ketones, and lipids. Different reaction mechanisms were observed in subcritical and supercritical states, leading to the identification of pyrazine derivatives compounds in the reaction products. The reaction products obtained at 300°C and 400°C demonstrated strong inhibition against Schizophyllum commune and Trametes versicolor fungi.
Article
Food Science & Technology
Gabriella Giovana Zampar, Isabella Carolina Zampar, Sandra Beserra da Silva de Souza, Camila da Silva, Beatriz Cervejeira Bolanho Barros
Summary: This study investigated the ultrasound-assisted extraction of phenolic compounds from pineapple peels using different solvents and operating conditions. The extracts were characterized for their phenolic profile, sugar composition, and antioxidant potential. The results showed that the mixture of ethanol and acid solution exhibited the highest efficiency in extracting total phenolic compounds and antioxidant activity. By controlling the time, temperature, and ultrasonic power, extracts with specific phenolic acids and soluble sugars were obtained. Therefore, this study provides an alternative method for the valorization of pineapple waste.
Article
Food Science & Technology
Jonas Marcelo Jaski, Rayane Monique Sete da Cruz, Tatiana Colombo Pimentel, Natalia Stevanato, Camila da Silva, Carlos Eduardo Barao, Lucio Cardozo-Filho
Summary: This study aimed to combine two high-quality products, olive leaves and chia and sesame seeds, to obtain oils with attractive nutritional properties and high levels of bioactive compounds. The use of pressurized propane in vegetable oil extraction provided solvent-free oil. The mass percentage yields of the olive leaf extracts with chia and sesame oils were 23.4% and 24.8%, respectively.
Article
Chemistry, Multidisciplinary
Lizana Emanuele Silva de Souza, Katia Andressa Santos, Djessica Tatiane Raspe, Camila da Silva, Edson Antonio da Silva
Summary: The study aimed to evaluate the effectiveness of ultrasound-assisted extraction (UAE) with ethanol as the solvent to obtain the extract from Echinodorus macrophyllus leaves. The effects of temperature, ultrasound power, and sample/solvent ratio on extraction yield, as well as the content of squalene, phenolic compounds, antioxidant activity, and antimicrobial activity were analyzed. The highest extraction yield (10.93 wt%) was obtained at 40 degrees C, 70% amplitude (525 W), and a solvent/sample ratio of 30 mL g-1. The extract obtained at 40 degrees C, ultrasound power at 525 W, and solvent/sample ratio of 10 mL g-1 showed a gallic acid equivalent (GAE) content of 52.95 mg per 100 g of extract and a concentration of 0.56 mg mL-1 required for 50% inhibition of DPPH radical. All extracts contained squalene, with the highest recorded concentration being 0.3795 g per 100 g of extract. Antimicrobial analysis revealed weak potential of the extracts against Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa strains.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Chemistry, Multidisciplinary
Natalia Stevanato, Oscar de Oliveira Santos Junior, Camila da Silva
Summary: In this study, pressurized aqueous ethanol (PAE) was used to process defatted meal (DM) from forage radish seeds, resulting in the production of an antioxidant extract and processed defatted meal (PDM). The concentration of ethanol in the solvent (25, 50, and 75 wt%) was investigated for its effects on the extraction yield and chemical properties of the products. The use of PAE/75 wt% ethanol led to a lower extraction yield but reduced the loss of soluble proteins, resulting in a more selective extraction of phenolic compounds and an extract with higher antioxidant capacity. The total glucosinolate content of the DM was also reduced with the application of PAE. The PDM obtained exhibited desirable nutritional and functional properties. The study demonstrated that PAE allowed for the simultaneous production of a detoxified defatted meal rich in proteins, suitable for human and/or animal food, and an extract rich in phytochemical compounds, with potential applications in the chemical and pharmaceutical industries, thus promoting the valorization of biodiesel by-products from non-food raw materials.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Chemistry, Multidisciplinary
Meline G. Porcel, Junior Staudt, Gustavo H. Spohr, Camila da Silva, Carlos E. Borba
Summary: The objective of this paper was to evaluate the kinetics of soybean oil hydrolysis by Lipozyme (R) TL IM enzyme under different operational conditions. A mathematical model based on the PPBB kinetic mechanism was proposed to describe the experimental data, which showed good agreement with the data in a wide temperature range. The results suggest that the model can be a useful tool for optimizing and assessing the mechanisms of enzymatic hydrolysis of vegetable oil.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2023)
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)
