Search Results - "Stateva, Roumiana P."

Microwave-assisted extraction of phenolic compounds from spent coffee grounds. Process optimization applying design of experiments by Coelho, Jose, Robalo, Maria Paula, Boyadzhieva, Stanislava, Stateva, Roumiana

“…In this study, sustainable technology microwave-assisted extraction (MAE) in association with green solvents was applied to recover phenolic compounds from…”
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Novel Insights into the Biological Activity of Croton lechleri Twigs Extracts and Advancements in Their Sustainable Recovery by Tzintzarov, Alexander, Boyadzhieva, Stanislava S, Coelho, Jose A P, Tsvetanova, Flora, Petrova, Maria, Stoev, Georgi, Yankov, Dragomir S, Ugrinova, Iva, Stateva, Roumiana P

“…Sangre de drago, the sap of Müll. Arg. tree, has been used for centuries in traditional medicine owing to its diverse biological activities. Extracts derived…”
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Sustainable Transformation of Two Algal Species of Different Genera to High-Value Chemicals and Bioproducts by Tsvetanova, Flora V, Boyadzhieva, Stanislava S, Coelho, Jose A Paixão, Yankov, Dragomir S, Stateva, Roumiana P

“…This study investigates the potential of two algae species from different genera, namely the recently isolated BGP and , from the perspective of their integral…”
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A Network of Processes for Biorefining Burdock Seeds and Roots by di Bitonto, Luigi, Scelsi, Enrico, Errico, Massimiliano, Reynel-Ávila, Hilda Elizabeth, Mendoza-Castillo, Didilia Ileana, Bonilla-Petriciolet, Adrián, Corazza, Marcos Lucio, Shigueyuki Kanda, Luis Ricardo, Hájek, Martin, Stateva, Roumiana P, Pastore, Carlo

“…In this work, a novel sustainable approach was proposed for the integral valorisation of (burdock) seeds and roots. Firstly, a preliminary recovery of…”
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Assessment of Gnaphalium viscosum (Kunth) Valorization Prospects: Sustainable Recovery of Antioxidants by Different Techniques by Boyadzhieva, Stanislava, Coelho, Jose A P, Errico, Massimiliano, Reynel-Avilla, H Elizabeth, Yankov, Dragomir S, Bonilla-Petriciolet, Adrian, Stateva, Roumiana P

“…This work investigates the prospects for exploitation of (Kunth) abundant but with limited applications till present biomass. The feasibility of traditional…”
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Brewer's spent grain, coffee grounds, burdock, and willow-four examples of biowaste and biomass valorization through advanced green extraction technologies by Errico, Massimiliano, Coelho, Jose, Stateva, Roumiana, Christensen, Knud, El-Houri, Rime Bahij, Tronci, Stefania

“…This paper explores the transformation of biowastes from food industry and agriculture into high-value products through four examples. The objective is to…”
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Optimization of Oil Recovery from Japonica Luna Rice Bran by Supercritical Carbon Dioxide Applying Design of Experiments: Characterization of the Oil and Mass Transfer Modeling by Coelho, José P., Robalo, Maria Paula, Fernandes, Inês S., Stateva, Roumiana P.

“…This study presents an optimization strategy for recovery of oil from Japonica Luna rice bran using supercritical carbon dioxide (scCO2), based on design of…”
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On the Solubility of Three Disperse Anthraquinone Dyes in Supercritical Carbon Dioxide: New Experimental Data and Correlation by Coelho, Jose P, Mendonça, Andrea F, Palavra, António F, Stateva, Roumiana P

“…Solubility measurements of quinizarin (1,4-dihydroxyanthraquinone), disperse red 9 (1-(methylamino) anthraquinone), and disperse blue 14…”
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New developments in the modelling of carotenoids extraction from microalgae with supercritical CO2 by Sovová, Helena, Stateva, Roumiana P.

“…[Display omitted] •Analysis of literature data on CO2 extraction of microalgal oil and carotenoids.•Hypothesis: extracted carotenoids are dissolved in the oil…”
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New Approach to Modeling Supercritical CO2 Extraction of Cuticular Waxes: Interplay between Solubility and Kinetics by Sovova, Helena, Stateva, Roumiana P

“…This paper presents a new approach to modeling the kinetics of a supercritical fluid extraction of a mixture of solids. Experimental data on pure long-chain…”
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Recovering value from organic waste materials: Supercritical fluid extraction of oil from industrial grape seeds by Coelho, José P., Filipe, Rui M., Robalo, M. Paula, Stateva, Roumiana P.

“…[Display omitted] •ScCO2 extraction of oil from grape seeds from a Portuguese industry was carried.•Higher PUFA and lower saturated fatty acids content in…”
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A novel model for multicomponent supercritical fluid extraction and its application to Ruta graveolens by Sovová, Helena, Sajfrtová, Marie, Stateva, Roumiana P.

“…[Display omitted] •Extraction of 2 samples of rue different in contents of coumarins (C) and waxes (W).•Solubility of xanthotoxin (one of common rue…”
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Assessment of composition and biological activity of Arctium lappa leaves extracts obtained with pressurized liquid and supercritical CO2 extraction by de Souza, Ariádine Reder Custódio, Stefanov, Stefan, Bombardelli, Michele C.M., Corazza, Marcos L., Stateva, Roumiana P.

“…[Display omitted] •Arctium lappa leaves extraction was evaluated using PLE for the first time.•Biological properties of the extracts obtained were studied.•PLE…”
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Extraction of thymol from different varieties of thyme plants using green solvents by Villanueva Bermejo, David, Angelov, Ivan, Vicente, Gonzalo, Stateva, Roumiana P, Rodriguez García‐Risco, Mónica, Reglero, Guillermo, Ibañez, Elena, Fornari, Tiziana

“…BACKGROUND: Thymol (2‐isopropyl‐5‐methylphenol) is the main monoterpene phenol found in thyme essential oil. This compound has revealed several biological…”
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Liquid Density and Critical Properties of Hydrocarbons Estimated from Molecular Structure by Wakeham, William A, Cholakov, Georgi St, Stateva, Roumiana P

“…The paper provides new correlations for the estimation of the relative liquid density and critical parameters of hydrocarbons. The correlations employ…”
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Semi-empirical models and a cubic equation of state for correlation of solids solubility in scCO2: Dyes and calix[4]arenes as illustrative examples by Coelho, Jose A.P., Filipe, Rui M., Naydenova, Greta P., Yankov, Dragomir S., Stateva, Roumiana P.

“…Knowledge of a compound's solubility in the supercritical solvent is crucial to the definition of the optimal operating conditions and consequently to the…”
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Phase Stability Analysis with Equations of StateA Fresh Look from a Different Perspective by Ivanov, Boyan B, Galushko, Anatolii A, Stateva, Roumiana P

“…The paper introduces a novel approach to the solution of the phase stability problem under constant temperature and pressure with equations of state (EoSs) as…”
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Solubility of CO2 in Ethyl Lactate and Modeling of the Phase Behavior of the CO2 + Ethyl Lactate Mixture by Villanueva Bermejo, David, Ibáñez, Elena, Stateva, Roumiana P, Fornari, Tiziana

“…Ethyl lactate (ethyl 2-hydroxypropanoate) is emerging as an ecofriendly solvent with wide applications in the food, pharmaceutical, and fine chemical…”
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Solubility of Red 153 and Blue 1 in Supercritical Carbon Dioxide by Coelho, José P, Stateva, Roumiana P

“…Solubilities of red 153, (3-[[4-[[5,6(or 6,7)-dichloro-2-benzothiazolyl]azo]phenyl]ethylamino]propanenitrile), an azo compound, and disperse blue 1…”
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Application of a novel approach to modelling the supercritical extraction kinetics of oil from two sets of chia seeds by Villanueva-Bermejo, David, Fornari, Tiziana, Calvo, Maria V., Fontecha, Javier, Coelho, Jose A.P., Filipe, Rui M., Stateva, Roumiana P.

“…[Display omitted] The kinetics of the supercritical fluid extraction of edible and discarded chia seeds was studied and modelled for the first time. The total…”
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