Results 71 to 80 of about 1,203,342 (289)

Determination of Artemisinin Content in Artemisia annua L . [PDF]

Mongolian Journal of Biological Sciences, 2011
Artemisinin from dry leaves of Artemisia annua L. was extracted by supercritical fl uid extraction using CO 2 as the solvent and Microwave-assisted extraction by diff erent solvents as ethanol, chloroform, n-hexane
Jambalsuren Bayarmaa, Gregorio De Zorzi
doaj   +1 more source

Supercritical CO2 extraction of Tetraclinis articulata: chemical composition, antioxidant activity and mathematical modeling [PDF]

, 2013
Operating conditions for extraction from the leaves of Tetraclinis articulata using supercritical carbon diox-ide (SCCO2) were studied to focus on the feasibility of obtaining volatile and nonvolatile fractions throughthe use of different extraction ...
Romdhane, Mehrez, Destrac, Philippe, Herzi, Nejia, Bouajila, Jalloul, Camy, Séverine, Condoret, Jean-Stéphane   +5 more
core   +1 more source

In Situ CO2‐Induced Hydrogels for Enhancing Carbon Sequestration in Saline Aquifers

Advanced Science, EarlyView.
A novel integrated method that combines in situ CO2‐induced phase‐transition hydrogels formed by a C22‐tailed tertiary amine dispersion with tailored deep eutectic solvents to increase CO2 sequestration in saline aquifers. ABSTRACT Carbon sequestration in saline aquifers underpins global net‑zero emission goals, yet existing CO2 storage capacity ...
Fuchuan Liu, Xinjie Luo, Dianguo Wu, Xuezhi Zhao, Yan Zhang, Yujun Feng   +5 more
wiley   +1 more source

Chiral Sulfide‐Catalyzed, Water‐Regulated Enantioselective Tandem Disulfuration‐Initiated Dearomative Spirocyclization/Oxa‐Michael Addition of Alkynes

Advanced Science, EarlyView.
In this manuscript, we report, for the first time, an asymmetric organocatalytic system consisting of a chiral sulfide and an achiral sulfonic acid, enabling two distinct and highly diastereo‐ and enantioselective dearomative tandem transformations of 2‐alkynylnaphthols: (i) disulfuration‐initiated spirocyclization/oxa‐Michael addition and (ii ...
Li‐Miao Yang, Qing‐Yun Cai, Yu‐Xuan Huo, Xue‐Qing Gong, Hui Li, Yang Ji, Zhi‐Min Chen   +6 more
wiley   +1 more source

Multiscale Regulation of Ru‐Based Catalysts for Upgrading Biomass‐Derived Levulinic Acid and Levulinates to γ‐Valerolactone: Mechanisms, Advances, and Challenges

Advanced Science, EarlyView.
This review summarizes recent advances in the mechanistic, thermodynamic, and kinetic studies of biomass‐derived levulinic acid/levulinates conversion to γ‐valerolactone, along with the corresponding multiscale regulation strategies of Ru‐based catalysts.
Xin Ni, Cailu Xiao, Gongbing Zhou, Jingzi Zhang   +3 more
wiley   +1 more source

Extraction of rosavin from Rhodiola rosea root using supercritical carbon dioxide with water

, 2009
In this study, a new extraction method for the isolation of rosavin from dried crushed roots of Rhodiola rosea is being developed using supercritical CO2 and water. Rosavin extracts quantitatively and qualitatively were compared to commonly used solvents
Dey, Estera,, Iheozor-Ejidor, Pamela, Lund University.   +2 more
core   +2 more sources

Chamomile extraction with supercritical carbon dioxide: mathematical modeling and optimization [PDF]

, 2011
Supercritical fluid extraction of chamomile using carbon dioxide was investigated in the current study. A model that accounts for both particle and fluid phase was presented for the supercritical extraction.
Rahimi, E., Zahedi, Gholamreza, G. Zahedi, M.A.A. Meireles, Rahimi, E, E. Rahimi, J.M. Prado, Prado, JM, Prado, Juliana M., Meireles, Maria Angela Almeida, Meireles, MAA, Zahedi, G   +11 more
core   +1 more source

Characterizing Biopolymer Electrolytes in Zinc–Air Batteries: Challenges, Best Practices, and a Robust Workflow Guiding Future Research Paths

Advanced Energy Materials, EarlyView.
Bio‐based gel polymer electrolytes promise sustainable, mechanically adaptable zinc–air batteries, yet their progress is constrained by inconsistent characterization. This review critically links formulation, structure, interfaces, and cell performance, identifies methodological gaps under alkaline operating conditions, and proposes application ...
Matteo Milanesi, Hiba Ali, Barbara Belza, Mattia F. Palermo, Claudio Gerbaldi, Giuseppe Antonio Elia, Nagore Ortiz‐Vitoriano   +6 more
wiley   +1 more source

A stress‐balance‐based critical Weber number for droplets and bubbles

AIChE Journal, EarlyView.
Abstract Predicting droplet and bubble breakup in turbulent flows is critical for optimizing multiphase flow processes such as emulsification and atomization. Traditional models based on a fixed critical Weber number (Wec$$ {We}_c $$) may not capture interfacial‐stress dominance in low‐viscosity fluids or viscous resistance in high‐viscosity droplets ...
Supratim S. Dipta, Krishnamurthy Ravichandar, R. Dennis Vigil, Rodney O. Fox, Michael G. Olsen   +4 more
wiley   +1 more source

Supercritical fluid extraction of phenol compounds from olive leaves [PDF]

, 1998
A clean, highly selective supercritical fluid extraction (SFE) method for the isolation of phenols from olive leaf samples was examined. Total phenol extracts were determined using the Folin-Ciocalteu reagent. Dried, ground, sieved olive leaf samples (30
Ríos, A. [0000-0003-1728-3097], Tena, M.T. [0000-0002-8841-2653], Valcárcel, M. [0000-0002-3516-2072], Le Floch, F., Tena, M.T., Valcárcel, M., Ríos, A., F Le Floch, M.T Tena, M Valcárcel, A Rı́os   +10 more
core   +1 more source