
Sook Fun PangUniversiti Malaysia Pahang Al-Sultan Abdullah | ump · Faculty of Chemical and Natural Resources Engineering
Sook Fun Pang
Doctor of Engineering
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21
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Publications
Publications (21)
Extraction is a commonly used technique to obtain plant's bioactive compounds. However, the aforementioned technique involved prolonged thermal exposure which can cause a degradation of bioactive compounds. Thus, this paper presents a degradation kinetics study of terpene markers from Andrographis paniculata extracts. The degradation of terpenes oc...
The thermal stability and controlled release of Labisia pumila’s polyphenols was increased using a surface protein encapsulated microcapsule. The polyphenols were measured using an ultra-performance liquid chromatography, whereas the degradation mechanism was elucidated using a mass spectroscopy analysis. The microencapsulation increased the polyph...
This paper investigates the optimum processing conditions of microwave assisted extraction (MAE) of anthraquinone (aloe emodin, AE) and flavonoids (kaempferol 3-gentiobioside, K3G and kaempferol, KA) from Senna alata (L.) Roxb. The kinetic study indicates that MAE showed a greater extraction rate, compared to ultrasonic-assisted and maceration, due...
The auxiliary energy level affects the yield of terpene extraction from Andrographis paniculata. This paper presents the effect of auxiliary energy (0.22–50 W/mL) to the extraction yield of terpenes from Andrographis paniculata for the first time. Ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOF/MS) met...
Andrographis paniculata is often used as functional foods owing to its broad range of pharmaceutical activities due to the presence of main terpene compounds such as andrographolide, 14-deoxy-11,12-didehydroandrographolide and neoandrographolide. The aforementioned compounds must be extracted from the plant material before it can be routinely used...
This paper elucidates the correlation between the yield of mangiferin extraction from Phaleria macrocarpa fruits to the total phenolic content (TPC), total flavonoid content (TFC) and antioxidant activity (AA). Mangiferin extraction was performed using an ultrasonic assisted extraction (UAE) method. The effect of particle size, solvent to solid rat...
The effect of size reduction and extraction methods on the gallic acid (GA) extraction yield from Labisia pumila leaf is presented. The GA extraction from a dried powdered L. pumila leaves with particle size distribution ranging from 66.66 to 1055.18 μm was performed using 10% aqueous ethanol. Three different extraction methods such as microwave as...
Phaleria macrocarpa (ver. name: ‘mahkota dewa’) is a plant which has many medically useful antioxidant activities (Anggraini & Lewandowsky, 2015). The polyphenols responsible for this antioxidant activity has to be extracted before it can be routinely used (Shwter et al., 2016). This study investigates the extraction of polyphenols from P. macr...
This paper presents a method to enhance the thermal stability of Phyllanthus niruri polyphenols during spray drying. The major polyphenol content of the extracts derived from the aerial part of the plant was analyzed using an ultra-performance liquid chromatography, whereas the surface composition of the microcapsule was analyzed by x-ray photoelec...
The effect of auxiliary energy to the kaempferol extraction yield from Cassia alata is presented in this paper. The effect of auxiliary energy ranging from 0.045 to 20 W/ml was studied by performing extraction using ultrasonic assisted extraction (UAE), maceration (ME) and microwave assisted extraction (MAE). A ultra-performance liquid chromatograp...
A combined effect of microwave irradiation and solvent types on the phenolic compounds extraction from Orthosiphon stamineus leaves was studied. The effect of as extraction time, the microwave irradiation power and solid to solvent ratio on the extraction yield was studied. Aqueous solvent provides a broader range of polarity than the pure solvent,...
Objectives: To find out the effect of ultrasonic assisted extraction with various solvents of phenolic and flavonoid compound extracted from P. niruri. Methods/Statistical Analysis: Phenolic content from P. niruri was analyzed using Singleton’s method while the flavonoid content was analyzed by aluminum chloride colorimetric assay. Findings: The po...
This paper presents the effect of particle size and solvent type on the gallic acid (GA) extraction yield obtained from Labisia pumila. The GA extraction from a grinded dried plant material (66.66 μm to 1055.18 μm) was performed using the sonicator probe. The GA quantification and identification was performed using a liquid chromatography with phot...
This paper presents the effect of auxiliary energy on rhein, kaempferol and astragalin extraction from Cassia alata. The effect of auxiliary energy was examined by performing extraction using either the ultrasonic assisted extraction (UAE) or microwave assisted extraction (MAE). A dried plant material with size ranging from 125 μm to 800 μm was use...
This paper presents an extraction and antimicrobial study of essential oil obtained from Nigella sativa seeds. Extraction using polar solvent resulted in higher recovery of desired bioactive compounds, thymoquinone and thymol. It was found that extraction of antioxidant (i.e. Agidol 7) favours aqueous solvent, i.e. 50% ethanol and 50% methanol. The...
This paper presents a combined effect of ultrasonic assisted extraction and solvents of varying polarities on phenolic compound extraction from O. stamineus. The polyphenol content in the plant extracts was analysed using Singleton's method and aluminium chloride colorimetric assay. The results suggest that the polyphenol extraction from O. stamine...
This paper presents an extraction and microencapsulation study of polyphenols obtained from Orthosiphon stamineus leaves. Extraction using aqueous solvent enabled a simultaneous extraction of both hydrophilic and lipophilic phenolic compounds. Higher solid concentration leads to higher solution viscosity, bigger particle size, lower moisture conten...
This paper presents the influence of nutrient addition namely MgSO4, C3H7NO2, (NH4)2SO4 and Na2HPO4 to the bioethanol yield from oil palm trunk saps (OPTS) with fermentation carried out by Saccharomyces cerevisiae. The sugar and ethanol contents in sample were determined using a high-performance liquid chromatography. Nutrient addition has improved...
This article presents findings of a microencapsulation study of flavonoids obtained from Orthosiphon stamineus leaves. The plant extract was obtained using ultrasonic-assisted extraction method. Protein and a polysaccharide derivative (maltodextrin) were used as the microencapsulation agent. Aqueous extract and dried powder were tested for their to...