Lee Boon Beng
Thumbnail Image
Preferred name
Lee Boon Beng
Official Name
Boon Beng, Lee
Alternative Name
Lee, B. B.
Lee, Boon Beng
Boonbeng, Lee
Main Affiliation
Scopus Author ID
55955762100

Research Output

No data found

Filters

Show more
1
3
Reset filters

Settings
Now showing 1 - 3 of 3
  • Publication
    Extraction of bioactive secondary metabolites from Citrus Axima peel via pressurized hot water extractor for the synthesis of iron oxide nanoparticles
    ( 2024-06)
    Yi-Peng Teoh
    ;
    Nurdalilah Othman
    ;
    Sam Sung Ting
    ;
    Zhong-Xian Ooi
    ;
    Liu Wei Wen
    ;
    Saparu Walli
    ;
    Lian-See Tan
    ;
    Lee Boon Beng
    Using bioactive secondary metabolites (BSM) from Citrus maxima peel extract, this work investigated a green method of synthesizing magnetite iron oxide (Fe3O4) nanoparticles (NPs). The BSM acts as a reducing cum stabilizing agent in the process. The optimization of the BSM parameters were conducted through response surface methodology (RSM). The optimal condition obtained in this study for pressurized hot water extractor (PHWE) extraction was temperature of 94.96 °C, solvent-to-solid ratio of 29.7 ml/g and extraction time of 27.6 min. BSM Yield of 49.31 % could be obtained based on this condition. The formation of Fe3O4 NPs were detected using the FTIR analysis with the absorption peaks observed at around 590 and 580 cm−1. X-ray diffraction results matched standard magnetite Fe3O4 patterns with planes at (220), (311), (400), (511) and (440). Field emission scanning electron microscopy (FESEM) results showed that the magnetite Fe3O4 NPs synthesized in this study predominantly appeared in spherical shape. The extraction process's kinetics were examined using various empirical models, including the Elovich’s model, Peleg’s model, Power law and parabolic diffusion model. All applied models were found to be well fitted with the measured data from experiment, with R2 values exceeding 0.9. Notably, the Peleg’s model exhibited the highest R2, the smallest RMSD, and the least significant p-values, indicating its superior performance.
      2  21
  • Publication
    Effects of different biomass on the properties of Pleurotus Djamor eco-friendly foam
    (EDP Sciences, 2023)
    Nur Mawaddah Majib
    ;
    Sam Sung Ting
    ;
    Lee Boon Beng
    ;
    Noorulnajwa Diyana Yaacob
    ;
    Nor Munirah Rohaizad
    Plastic waste and polyurethane foam are major sources of pollution that threatens environmentsâ biodiversity. The objective of the study is to create an eco-friendly foam from Pleorotus djamor mycelium, rice husk and sugarcane bagasse. The mushroom industryâ s overabundance of materials, like oyster mushrooms and biomass, has provided an alternative method to make foam that could be beneficial for the environment. The biomass, consisting of rice husk and sugarcane bagasse, both of which are necessary for the production of foam, was evaluated as a substrate. Pleurotus djamor was inoculated on both substrates and test was done on both produced foams. Mechanical tests showed that rice husk foam had higher hardness and less springy than sugarcane bagasse foam. The morphology of both foams was analyzed using a scanning electron microscope (SEM), and the results show that sugarcane bagasse foam is denser than rice husk foam.
      3  21
  • Publication
    Extraction of Bioactive Secondary Metabolites from Citrus Maxima Peel Via Pressurized Hot Water Extractor for the Synthesis of Iron Oxide Nanoparticles
    ( 2024-06-01)
    Teoh Y.P.
    ;
    Othman N.
    ;
    Sam Sung Ting
    ;
    Ooi Z.X.
    ;
    Liu Wei Wen
    ;
    Walli S.
    ;
    Tan L.S.
    ;
    Lee Boon Beng
    Using bioactive secondary metabolites (BSM) from Citrus maxima peel extract, this work investigated a green method of synthesizing magnetite iron oxide (Fe3O4) nanoparticles (NPs). The BSM acts as a reducing cum stabilizing agent in the process. The optimization of the BSM parameters were conducted through response surface methodology (RSM). The optimal condition obtained in this study for pressurized hot water extractor (PHWE) extraction was temperature of 94.96 °C, solvent-to-solid ratio of 29.7 ml/g and extraction time of 27.6 min. BSM Yield of 49.31 % could be obtained based on this condition. The formation of Fe3O4 NPs were detected using the FTIR analysis with the absorption peaks observed at around 590 and 580 cm−1. X-ray diffraction results matched standard magnetite Fe3O4 patterns with planes at (220), (311), (400), (511) and (440). Field emission scanning electron microscopy (FESEM) results showed that the magnetite Fe3O4 NPs synthesized in this study predominantly appeared in spherical shape. The extraction process's kinetics were examined using various empirical models, including the Elovich’s model, Peleg’s model, Power law and parabolic diffusion model. All applied models were found to be well fitted with the measured data from experiment, with R2 values exceeding 0.9. Notably, the Peleg’s model exhibited the highest R2, the smallest RMSD, and the least significant p-values, indicating its superior performance.
      8  14