Generalized multi-scale kinetic model for data-driven modelling: Mangifera pajang antioxidant degradation in choline chloride/ascorbic acid natural deep eutectic solvent

2021 ◽  
pp. 110741
Author(s):  
Jordy Kim Ung Ling ◽  
Jobrun Nandong ◽  
Yen San Chan
Keyword(s):  
Ascorbic Acid ◽  
Kinetic Model ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Data Driven ◽  
Multi Scale ◽  
Natural Deep Eutectic Solvent

scholarly journals Assessment of Natural Deep Eutectic Solvent Pretreatment on Sugar Production from Lignocellulosic Biomass

2018 ◽  
Vol 152 ◽  
pp. 01014 ◽  
Author(s):  
Yoon Li Wan ◽  
Yuen Jun Mun
Keyword(s):  
Enzymatic Hydrolysis ◽  
Lignocellulosic Biomass ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Economic Feasibility ◽  
Effect Of Temperature ◽  
Sago Waste ◽  
Natural Deep Eutectic Solvent ◽  
Hydrolysis Of ◽  
Sugar Loss

Before the conversion of lignocellulosic biomass into fuel such as ethanol, the biomass needs to be pretreated and the yield of ethanol is highly dependent on the pretreatment efficiency. This study investigate the performance of deep eutectic solvent (DES) in pretreating sago waste which is a type of starchy biomass. The suitable type of DES in sago waste pretreatment was selected based on three criteria, which is the structural characteristic, the sugar yield during enzymatic hydrolysis and the amount of sugar loss during pretreatment. In this study, three types of DES namely Choline Chloride-Urea (ChCl-Urea), Choline Chloride-Citric acid (ChCl-CA) and Choline Chloride-Glycerol (ChCl-Glycerol) was investigated. The effect of temperature and duration on DES pretreatment was also investigated. All DES reagents were able to disrupt the structure and increase the porosity of sago waste during pretreatment. ChCl-Urea was selected in this study as it shows apparent structural disruption as examined under Scanning Electron Microscope (SEM). The highest glucose yield of 5.2 mg/mL was derived from enzymatic hydrolysis of ChCl-Urea pretreated sago waste. Moreover, reducing sugar loss during ChCl-Urea pretreatment was low, with only 0.8 mg/mL recorded. The most suitable temperature and duration for ChCl-Urea pretreatment is at 110°C and 3 hr. In a nutshell, the application of DES in pretreatment is feasible and other aspects such as the biodegradability and recyclability of DES is worth investigating to improve the economic feasibility of this pretreatment technique.

scholarly journals Natural Deep Eutectic Solvents as Sustainable Solvents for Suzuki­–Miyaura Cross-Coupling Reactions Applied to Imidazo-Fused Heterocycles

SynOpen ◽  
2018 ◽  
Vol 02 (04) ◽  
pp. 0306-0311 ◽  
Author(s):  
Pierre-Olivier Delaye ◽  
Mélanie Pénichon ◽  
Leslie Boudesocque-Delaye ◽  
Cécile Enguehard-Gueiffier ◽  
Alain Gueiffier
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Cross Coupling ◽  
Deep Eutectic Solvents ◽  
Coupling Reactions ◽  
Biologically Relevant ◽  
Cross Coupling Reactions ◽  
Fused Heterocycles ◽  
Natural Deep Eutectic Solvents ◽  
Natural Deep Eutectic Solvent

Herein, we present the first Suzuki–Miyaura cross-coupling in a sustainable natural deep eutectic solvent (NaDES) applied to biologically relevant imidazo-fused scaffolds imidazo[1,2-a]pyridine and imidazo[1,2-b]pyridazine. The choline chloride/glycerol (1:2, mol/mol) NaDES allowed the functionalisation of diverse positions on the heterocycles with various boronic acids, by using 2.5 mol% of readily available Pd(OAc)2. Notably, the catalytic system proceeds without any ligands or additives, without protection from the atmosphere.

scholarly journals Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 350 ◽  
Author(s):  
Mikhail A. Smirnov ◽  
Alexandra L. Nikolaeva ◽  
Vitaly K. Vorobiov ◽  
Natalia V. Bobrova ◽  
Ivan V. Abalov ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Choline Chloride ◽  
Composite Films ◽  
Deep Eutectic Solvent ◽  
Thermomechanical Analysis ◽  
X Ray Scattering ◽  
Composition And Structure ◽  
Solution Casting Method ◽  
Natural Deep Eutectic Solvent ◽  
The Impact

The natural deep eutectic solvent (NADES) based on choline chloride (ChCl) and lactic acid (LA) was used for the preparation of chitosan (CS) films by the solution casting method. The content of NADES in films was from 0 to 82 wt%. The impact of NADES on the morphology and crystalline structure of films was investigated using scanning electron microscopy as well as wide-angle and small-angle X-ray scattering. The experimental results allow to propose CS chains swelling in NADES. FTIR spectroscopy confirms the interactions between CS and NADES components via the formation of hydrogen and ion bonds. The thermal properties of the composite films were studied by simultaneous thermogravimetric and differential thermal analysis. Thermomechanical analysis demonstrated appearance of two transitions at temperatures between −23 and −5 °C and 54–102 °C depending on NADES content. It was found that electrical conductivity of film with 82 wt% of NADES reaches 1.7 mS/cm. The influence of the composition and structure of films on the charge carriers concentration and their mobility is discussed.

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