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96 results on '"Idham, Zuhaili"'

6. Characteristics and Empirical Modelling of Extract from Hibiscus sabdariffa Using Supercritical CO2 Extraction with Ethanol-Water as Modifier

Author

Idham, Zuhaili, Putra, Nicky Rahmana, Idrus, Nor Faadila Mohd, Mili, Norlisa, Ruslan, Muhammad Syafiq Hazwan, Rasidek, Noor Azwani Mohd, Yunus, Mohd Azizi Che, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Zaini, Muhammad Abbas Ahmad, editor, Jusoh, Mazura, editor, and Othman, Norasikin, editor

Published
2021
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7. A Selection Design of Experiment for Optimization of Process Variables for Supercritical Carbon Dioxide Using Response Surface Methodology: A Review

Author

Mili, Norlisa, Idrus, Nor Faadila Mohd, Idham, Zuhaili, Rasidek, Noor Azwani Mohd, Mustaffa, Azizul Azri Bin, Yunus, Mohd Azizi Che, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Zaini, Muhammad Abbas Ahmad, editor, Jusoh, Mazura, editor, and Othman, Norasikin, editor

Published
2021
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8. Optimization of Anthocyanins Extracts from Roselle (Hibiscus sabdarifa) Petals Using Ultrasonic-Assisted Extraction Method

Author

Redzuan, Syafiqah, Ho, Chai Yee, Idham, Zuhaili, Yusuf, Suzana, Putra, Nicky Rahman, Yunus, Mohd Azizi Che, Mansor, Syamila, Ruslan, Muhammad Syafiq Hazwan, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Zaini, Muhammad Abbas Ahmad, editor, Jusoh, Mazura, editor, and Othman, Norasikin, editor

Published
2021
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18. Recovery of Anthocyanins from Hibiscus sabdariffa L. Using a Combination of Supercritical Carbon Dioxide Extraction and Subcritical Water Extraction.

Author

Rizkiyah, Dwila Nur, Putra, Nicky Rahmana, Idham, Zuhaili, Aziz, Ahmad Hazim Abdul, Che Yunus, Mohd Azizi, Veza, Ibham, Irianto, Chinedu Mamah, Stanley, and Qomariyah, Lailatul

Subjects
ANTHOCYANINS, ROSELLE, SUPERCRITICAL carbon dioxide, PHENOLS
Abstract

Anthocyanins are one of the bioactive compounds in roselle that has many medicinal proposes. Anthocyanins are placed in the inner part of the roselle; therefore, combinations of two methods were applied to extract the anthocyanins. The first stage is employing supercritical carbon dioxide (ScCO2) to break the particle surface or outer layer of the roselle based on the total phenolic compounds (TPC) recovery, and the second step was to apply subcritical water extraction (SWE) for the extraction of anthocyanins. The objective is to determine the best conditions to obtain high yields of total anthocyanins compounds (TAC) from the roselle (Hibiscus sabdariffa) by employing a combination of ScCO2 and SWE. The optimal conditions of ScCO2 (first stage) were 19.13 MPa, 60 °C, and 4.31 mL/min, yielding 18.20%, and 80.34 mg/100 g TPC, respectively. The optimum conditions of SWE (second stage) were 9.48 MPa, 137 °C, and 6.14 mL/min, yielding 86.11% and 1224.61 mg/100 g TAC, respectively. The application of integrated ScCO2 and SWE proved successful in achieving high anthocyanins production and yield as compared to previous extraction methods. This approach may be used to extract the roselle with a greater anthocyanin's concentration than the prior method. [ABSTRACT FROM AUTHOR]

Published
2023
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27. Formulation and evaluation of a new semi-empirical model for solubility of plant extracts in supercritical carbon dioxide assisted by ethanol as co-solvent.

Author

Putra, Nicky Rahmana, Rizkiyah, Dwila Nur, Idham, Zuhaili, Salleh, Liza Mohd, Machmudah, Siti, and Yunus, Mohd Azizi Che

Subjects
SUPERCRITICAL carbon dioxide, PLANT extracts, SOLUBILITY, ETHANOL
Abstract

An accurate and suitable semi-empirical model is crucial to determine the solubility of plant extracts in supercritical carbon dioxide (SC-CO2) assisted by ethanol as a co-solvent. In this paper, a new solubility model was proposed to correlate the plant solubility to SC-CO2 and ethanol. The accuracy and capability of the new model were evaluated by fitting it with published solubility datasets. The overall percentage of average absolute relative deviation was 12.13%, and the average coefficient of determination (R2) was 0.89. Comparisons between the results of the new model and the published models showed an excellent capability and accuracy in fitting solute solubility in SC-CO2 in the presence of ethanol as a co-solvent. [ABSTRACT FROM AUTHOR]

Published
2021
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36. Comparison Extraction of Peanut Skin between CO2 Supercritical Fluid Extraction and Soxhlet Extraction in Term of Oil Yield and Catechin.

Author

Putra, Nicky Rahmana, Yunus, Mohd Azizi Che, Ruslan, Muhammad Syafiq Hazwan, Idham, Zuhaili, and Idrus, Fadillah Nur

Subjects
PEANUTS, SUPERCRITICAL fluid extraction, PEANUT oil, CATECHIN, HIGH performance liquid chromatography
Abstract

The objective of this study was to compare the extraction of peanut skin using supercritical carbon dioxide extraction and soxhlet extraction in terms of oil yield and catechin. For supercritical fluid extraction, the temperatures used were 40 and 70°C, while pressure used was 10 and 30 MPa, the flow rate was CO2 3 mL/min, and the concentration of co-solvents was 0 and 5%. Meanwhile, for soxhlet extraction, the extraction time was 6 hr with ethanol, hexane and water as the solvents. The results showed that soxhlet extraction gave the highest yield of extract (36.282%) using ethanol as solvent as compared with supercritical CO2 extraction (15.47%) at pressure 30 MPa, temperature 70°C and 5% concentration of co-solvent. This study reveals that the extracts from SC-CO2 extraction yielded the highest amount of catechin (208.73 µg/g sample) compared with that yielded in the soxhlet extraction (42.24 73 µg/g sample) with distilled water as a solvent analysed with High Performance Liquid Chromatography (HPLC). [ABSTRACT FROM AUTHOR]

Published
2018

37. Effect of operating conditions on catechin extraction from betel nuts using supercritical CO 2 -methanol extraction.

Author

Ruslan, Muhammad Syafiq Hazwan, Idham, Zuhaili, Nian Yian, Lee, Ahmad Zaini, Muhammad Abbas, and Che Yunus, Mohd Azizi

Subjects
*BETEL nut, *EXTRACTION (Chemistry), *SEPARATION (Technology), *SUPERCRITICAL carbon dioxide, *CATECHIN
Abstract

In this work, the effect of extraction parameters on catechin extraction from betel nuts was studied. The supercritical carbon dioxide extraction parameters were pressure, temperature, and solvent flow rate while using average particle size of 177.5 μm and 5% (v/v) methanol as modifiers. Detection and quantification of catechin were achieved using HPLC analysis. The highest amount of extract and catechin concentration were 34.00 mg extract/g sample and 565.38 ppm of catechin obtained at 30 MPa, 70°C, and 4 mL/min. The results given by optimization tools suggest the same operating conditions with less than 3% difference. [ABSTRACT FROM PUBLISHER]

Published
2018
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