Article
Thermodynamics
Francisca J. Justel, Yecid P. Jimenez
Summary: The physical properties of the ternary {Fe-2(SO4)(3) + PEG 4000 + H2O} system and its binary systems were experimentally determined and correlated using Othmer's rule at three different temperatures, showing good agreement between experimental and correlated data. Derived properties like isentropic compressibility and excess molar volumes were also determined. Predictions of densities and refractive indices using the Lorentz-Lorenz approximation also showed good agreement between experimental and predicted data.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2021)
Article
Thermodynamics
Vahid Hosseinpour Hashemi, Ebrahim Nemati-Kande, Zolfa Azizi
Summary: Curcumin partitioning behavior in an aqueous two-phase system was investigated, showing high tendency to be extracted to the polymer-rich phase, and the distribution coefficient and extraction efficiency decreased with increasing temperature. The tie-line compositions were successfully modeled using e-Wilson and e-NRTL models.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Multidisciplinary Sciences
Ebrahim Nemati-Kande, Zolfa Azizi, Marziyeh Mokarizadeh
Summary: Salbutamol is a drug used to treat pulmonary diseases by improving the medium and large airways in the lungs. The partitioning of salbutamol on ATPSs of PEG(1000,1500,2000,4000,6000) + trilithium citrate + water was studied, and the effect of polymer molecular mass on the binodal and tie-line compositions was investigated. The biphasic area expanded with increasing molecular mass of polymer. Salting-out ability was quantified using the Setschenow model, and the binodal curves were modeled using a nonlinear 3-parameter equation. Electrolyte Wilson and osmotic virial models were used to fit the tie-line compositions. The ATPSs of PEG(1000) were found to be preferable for extracting salbutamol to the polymer-affluent phase, while the ATPSs of PEG(6000) were more suitable for extracting the drug to the salt-affluent phase.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
Julia Trancoso, Daniel Qvistgaard, Marie V. Danielsen, Eleni Panteli, Even Solbraa, Georgios M. Kontogeorgis, Nicolas von Solms
Summary: This study measured vapor-liquid equilibrium data for the system triethylene glycol + water + methane under different conditions, expanding the experimental database for subsea gas processing technologies. A comparison with literature data revealed inconsistencies in one data set. The cubic-plus-association (CPA) equation-of-state modeling capability was reevaluated in this study.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Engineering, Chemical
Hussein Hassan, Jimmy Romanos
Summary: To enhance the progress of hydrate-based technologies, comprehensive data on the impact of mineral salts on gas hydrate phase behavior is explored in this research. Using the THF-CH4 hydrate system, the influence of NaCl and MgCl2, the primary dissolved salts in natural water, is examined. Experimental results show that THF effectively addresses the challenges of methane hydrate formation in saline water, making it a promising promoter. Additionally, the inhibitory effect of salts is more pronounced in concentrated THF solutions, and increasing the pressure for hydrate formation enhances the inhibitory effect of salts.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Thermodynamics
Vahid Hosseinpour Hashemi, Ebrahim Nemati-Kande, Zolfa Azizi
Summary: The partitioning behavior of curcumin in an aqueous two-phase system was studied and successfully modeled. The partition coefficient and extraction efficiency values decreased with increasing temperature, and the best partitioning results were obtained for tie-lines in the middle range of compositions.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Thermodynamics
Marziyeh Mokarizadeh, Ebrahim Nemati-Kande
Summary: This study reported the binodal and tie-line mass fractions of ternary polyethylene glycol 2000 + trilithium citrate + water aqueous two-phase systems (ATPSs) experimentally and thermodynamically modeled at different temperatures. The two-phase area of the liquid-liquid equilibrium region was found to increase with temperature. Two nonlinear models were successfully used to fit the binodal curves, and the electrolyte-Wilson and m-NRTL models showed good quality of fitting for the tie-line mass fractions. The results of this study provide a green and environmentally friendly ATPS for liquid-liquid extraction and purification purposes.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Thermodynamics
Feng Liu, Li Chen, Kangling Yin, Taotao Fan, Zongcheng Yan
Summary: This study investigates the phase formation mechanism of sugar-based natural deep eutectic solvent (DES) with alcohols using the excluded volume theory model. The study finds that the densities of the sugar-based DES and alcohol-rich phase have significant differences. By adjusting the number of hydroxyl groups and alkyl groups, the phase formation ability can be improved.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Thermodynamics
Hua Yang, Jun Li, Yang Jin, Ming Chen
Summary: The phase equilibrium behavior of MnSO4 in water-alcohol solution was investigated, and different combinations of liquid and solid phases were observed. The effects of alcohol types and temperatures on the formation of aqueous two-phase systems (ATPSs) were discussed. The results showed that the (CH3)2CHOH + MnSO4 + H2O system exhibited better solvent-out effect. The temperature had a slight influence on the phase behavior and the formation of ATPSs. This study provides basic data for manganese sulfate purification and can be applied to develop thermodynamic models of ATPSs.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Engineering, Chemical
Riccardo M. Swanepoel, Cara E. Schwarz
Summary: A simple method has been developed to predict the liquid-liquid, vapor-liquid, and vapor-liquid-liquid boundaries of solvent-polymer systems in the solution process. This method shows good results when applied to a wide range of systems containing different solvent combinations and nonaromatic hydrocarbon polymers. The predictions of lower critical end point temperatures and pressures, as well as the effects of ethylene and comonomer addition, show accurate results with relatively low average absolute deviations.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Hiroyuki Matsuda, Masahiko Ito, Kiyofumi Kurihara, Katsumi Tochigi
Summary: This study investigates vapor-liquid equilibria in dilute alcohol solutions, measuring infinite-dilution equilibrium ratios and comparing activity coefficients with literature and predicted values. The x-y-T-P data at finite compositions are then calculated using Wilson parameters based on infinite-dilution activity coefficients.
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
(2022)
Article
Thermodynamics
Sedigheh Miraghapour, Mohsen Pirdashti, Seyyed Mohammad Arzideh, Poorya Mobalegholeslam, Ianatul Khoiroh
Summary: The phase equilibrium data for the ternary systems [lithium sulfate (Li2SO4) + polyethylene glycol (PEG3000) + water] were measured. The solubility of Li2SO4 in the aqueous polymeric solution decreases as the content of PEG increases. The modified UNIQUAC-FV model provides a better correlation for the studied systems.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Veterinary Sciences
Shahad Al Nuimi, Yamama Z. Alabdaly
Summary: The study demonstrated that coenzyme Q-10 could counteract the damage caused by copper sulphate poisoning, reduce oxidative stress, and alleviate histopathological changes in the brain.
EGYPTIAN JOURNAL OF VETERINARY SCIENCE
(2022)
Article
Thermodynamics
Ebrahim Nemati-Kande, Zolfa Azizi, Vahid Hosseinpour Hashemi
Summary: The partitioning behavior of salbutamol drug in a poly(ethylene glycol) 6000 + lithium citrate + water system was investigated at different temperatures. The system showed an increased ability for two-phase formation at higher temperatures. The binodal curves were successfully modeled using the empirical Merchuk equation, and the tie-line compositions were fitted using the Setschenow-type equation and electrolyte Wilson models. The obtained partitioning parameters indicated the potential of the studied aqueous two-phase systems for extracting salbutamol from aqueous medium at a range of biological temperatures.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2023)
Article
Biochemical Research Methods
Paula Chequer Gouveia Mol, Lizzy Ayra Alcantara Verissimo, Luis Antonio Minim, Roberto da Silva
Summary: In this study, a polyacrylamide cryogel functionalized with L-phenylalanine was used for the adsorption and immobilization of beta-glucosidase from Thermoascus aurantiacus. The adsorption process was optimized at pH 3.0 with the highest purification factor and yield obtained. The immobilized enzyme showed good recovery activity on the hydrophobic cryogel and remained active in the presence of different saline solutions. The operational stability of the immobilized enzyme was also demonstrated, with no decrease in activity observed during seven cycles. Kinetic parameters were determined for both free and immobilized enzyme using different models.
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
(2023)
Article
Engineering, Chemical
Ana Cristina Freitas de Oliveira Meira, Richard Marins da Silva, Isabelle Cristina Oliveira Neves, Luis Antonio Minim, Lizzy Ayra Alcantara Verissimo, Jaime Vilela de Resende
Summary: The study designed a polyacrylamide cryogel functionalized with l-phenylalanine for lysozyme adsorption. The cryogel showed high porosity, good elasticity, and resistance to thermal degradation, and demonstrated efficient adsorption of lysozyme.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Food Science & Technology
Layla Barbosa Alves, Thomas Valente de Oliveira, Gustavo Leite Miliao, everton de Almeida Alves Barbosa, Gustavo Costa Bressan, Jane Selia dos Reis Coimbra, Eduardo Basilio de Oliveira
Summary: This study investigated the interaction between bovine whey protein beta-lactoglobulin (beta-lg) and vanillin, the main compound in vanilla flavor. Experimental results showed that the formation of beta-lg/vanillin complexes was driven by both hydrogen bonding and hydrophobic interactions. Molecular docking simulations revealed that vanillin could bind to two possible sites, with the B-site being the more likely binding site.
Article
Food Science & Technology
Viviane Sobreira Lima, Davi Rocha Bernardes de Oliveira, Cesar Augusto Sodre da Silva, Rejane de Castro Santana, Nilda de Fatima Ferreira Soares, Eduardo Basilio de Oliveira, Marcio Aredes Martins, Jane Selia dos Reis Coimbra
Summary: This study utilized water-soluble protein concentrates from the microalga Tetradesmus obliquus to stabilize sunflower oil emulsions. Proteins were extracted from disrupted microalgal cells and concentrated through lyophilization. Emulsions were produced using different concentrations of Tetradesmus obliquus protein concentrate (TobPC) and characterized for stability and physical properties. Isoelectric precipitation resulted in TobPC with higher protein content and better dispersibility. Emulsion stability was higher for both isoelectric TobPC and control systems compared to solvent TobPC, which showed larger oil droplets and flocculation spots. Increasing TobPC content resulted in more stable emulsions. Therefore, Tetradesmus obliquus protein concentrates have potential as emulsifying agents.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2023)
Article
Chemistry, Analytical
Katia Silva Maciel, Paula Chequer Gouveia Mol, Lizzy Ayra Alcantara Verissimo, Valeria Paula Rodrigues Minim, Luis Antonio Minim
Summary: This study proposed the development of a monolithic supermacroporous affinity column for direct capture of lactoperoxidase, a glycoprotein present in milk, whey, and colostrum, with several applications due to its wide antimicrobial activity. The adsorptive capacity of affinity cryogel was studied as a function of flow velocity and the best condition was 0.9 cm/min. The results indicated that affinity cryogel is a promising chromatography support for the use in high-throughput one-step purification of lactoperoxidase from whey.
JOURNAL OF SEPARATION SCIENCE
(2023)
Article
Engineering, Chemical
Bruno Bezerra Vieira, Jimmy Soares, Matheus Lopes Amorim, Rita de Cassia Superbi Souza, Eduardo Basilio de Oliveira, Jane Selia dos Reis Coimbra, Marleny Doris Aranda Saldana, Marcio Aredes Martins
Summary: Algae biorefinery requires specific parameters for control and monitoring of unit operations. Real-time monitoring of cell disruption processes is a current challenge in microalgal biorefineries. Different parameters in the aqueous phase and recovered biomass were evaluated as potential indicators of cell disruption, and precise models were developed to correlate levels of certain parameters with the degree of disruption. Parameters such as proteins, ultraviolet absorbance, lipids, chlorophylls a and b, and carotenoids showed great potential for use in algae biorefineries, with ultraviolet absorbance and pigments being the most practical indicators due to their ease of measurement.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Augusto Bene Tome Constantino, Edwin Elard Garcia-Rojas
Summary: Microencapsulation of beta-carotene (8-C) in amaranth carboxymethyl starch (CMS) and lactoferrin (LF) complex coacervates was achieved for application in gummy candies. The microcapsules showed spherical morphology and good photolytic and thermal stabilities. Release of 8-C was highest in the intestines and soybean oil, but low in ethanol. Addition of 8-C microcapsules reduced the hardness of gummy candies and allowed 22% bioaccessibility.
FOOD HYDROCOLLOIDS
(2023)
Article
Food Science & Technology
Jhonatan Rafael de Oliveira Bianchi, Bruna Elisa Reis Paz, Larissa Germano Fonseca, Rebeca Lima Carvalho, Jose Carlos Magalhaes, Karina Azevedo Pacheco, Andersen Escobar Schlogl, Daniela Leite Fabrino, Edson Romano Nucci, Jane Selia dos Reis Coimbra, Igor Jose Boggione Santos
Summary: Protein nanostructures can be used to enhance the properties of food formulations. This study explores the ideal conditions for producing and altering alpha-lactalbumin nanostructured aggregates, focusing on improvements in foaming, emulsification, techno-functional properties, cytotoxicity, and antibacterial activity compared to native alpha-lactalbumin. The changes in protein structure were observed in the alpha-helix and beta-sheet. The size of the nanostructures was 163.84 nm with a polydispersity index of 0.29. The nanostructures exhibited enhanced techno-functional properties and were non-toxic and harmless to bacteria. This study provides valuable insights for the application of alpha-lactalbumin nanostructured aggregates in the food industry.
JOURNAL OF FOOD SCIENCE
(2023)
Article
Food Science & Technology
Alessandra Casagrande Ribeiro, Edimar Aparecida Filomeno Fontes, Camilo Jose Ramirez Lopez, Wassali Valadares Sousa, Isabela Souza Gomes, Edvaldo Barros, Jane Selia dos Reis Coimbra, Sylvia do Carmo Castro Franceschini, Danielle Aparecida Silva, Maria Cristina Baracat-Pereira
Summary: This study uses proteomics analysis to find differential proteoforms in human milk, which are present in colostrum, transition milk, and mature milk. These findings provide important insights into neonates' protein needs.
MOLECULAR NUTRITION & FOOD RESEARCH
(2023)
Article
Food Science & Technology
Kelly Christine Barbosa Costa, Andersen Escobar Schlogl, Saymon Menezes de Souza, Enio Nazare de Oliveira Ju'nior, Jane Selia dos Reis Coimbra, Igor Jose Boggione Santos
Summary: This study investigates the potential use of ZnO nanostructures and tara gum coating to prolong the shelf life of guava fruit. The results show that ZnO nanostructures exhibit antimicrobial activity and maintain the visual and quality stability of guava for 16 days post-harvest. This research provides a potential packaging solution for the postharvest preservation of guava fruit.
ACS FOOD SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Danielle Cristine Mota Ferreira, Thais Cristina dos Santos, Jane Selia dos Reis Coimbra, Eduardo Basilio de Oliveira
Summary: Granular macroscopic chitosan/carboxymethylcellulose polyelectrolytic complexes (CHS/CMC macro-PECs) were studied as adsorbents for six pollutants often found in wastewater. The optimum adsorption pH values were determined for each pollutant. Kinetic and isotherm studies were conducted to analyze the adsorption behavior, with the Langmuir model providing the best fit. The maximum adsorption capacity and desorption capabilities of the CHS/CMC macro-PECs were also evaluated.
CARBOHYDRATE POLYMERS
(2023)
Review
Materials Science, Multidisciplinary
Marcos Silva de Sousa, Andersen Escobar Schlogl, Felipe Ramalho Estanislau, Victor Gomes Lauriano Souza, Jane Selia dos Reis Coimbra, Igor Jose Boggione Santos
Summary: Nanotechnology plays a crucial role in food packaging, extending shelf life, enhancing food safety, and providing information to consumers. However, safety considerations and regulations need to be addressed, as potential risks to human health and the environment exist. Despite challenges, nanotechnology-based packaging offers the potential for advancements in food preservation and substantial benefits for manufacturers and consumers.
Article
Agriculture, Multidisciplinary
Maria Julia Neves Martins, Marcio Augusto Ribeiro Sanches, Tiago Carregari Polachini, Eduardo Basilio de Oliveira, Jane Selia dos Reis Coimbra, Javier Telis-Romero
Summary: The objective of this study was to determine the solubilities of 14 different salts at different temperatures. The results showed that the solubilities varied with temperature and salt type. The availability of solubility data is important for various applications.
CIENCIA E AGROTECNOLOGIA
(2023)
Article
Chemistry, Applied
Alan Marques Farias, Augusto Bene Tome Constantino, Edwin Elard Garcia-Rojas
Summary: p-carotene (pC) was successfully microencapsulated using the complex coacervation of ovalbumin (OVA) and sodium alginate (NaAlg). The resulting microcapsules exhibited a spherical morphology, high encapsulation efficiency (97.90%), and release mechanism by Fickian diffusion. In vitro digestion simulation showed that 32.78% of encapsulated pC was bioaccessible in the intestines. Addition of pC microcapsules in cookies improved antioxidant activities by 2-fold compared to free pC microcapsules.
FOOD HYDROCOLLOIDS FOR HEALTH
(2023)
Article
Polymer Science
Barbara da Silva Soares, Carlos Wanderlei Piler de Carvalho, Edwin Elard Garcia-Rojas
Summary: High-intensity ultrasound irradiation effectively modifies tara gum by producing low molecular weight products and improving water solubility. This study optimized the parameters for high-intensity ultrasonic treatment using response surface methodology in order to enhance tara gum solubility. The results showed that ultrasound treatment increased the solubility of tara gum by 17.7% and reduced the molecular weight from 1.89 x 106 Da to 0.47 x 106 Da. Rheological analysis confirmed the improved solubility of the modified and optimized tara gum. This research contributes to a better understanding of ultrasound treatment and expands the potential applications of tara gum in the food industry.
POLIMEROS-CIENCIA E TECNOLOGIA
(2023)
