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Wilawan B, Chan SS, Ling TC, Show PL, Ng EP, Jonglertjunya W, Phadungbut P, Khoo KS. Advancement of Carotenogenesis of Astaxanthin from Haematococcus pluvialis: Recent Insight and Way Forward. Mol Biotechnol 2024; 66:402-423. [PMID: 37270443 DOI: 10.1007/s12033-023-00768-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/07/2023] [Indexed: 06/05/2023]
Abstract
The demand for astaxanthin has been increasing for many health applications ranging from pharmaceuticals, food, cosmetics, and aquaculture due to its bioactive properties. Haematococcus pluvialis is widely recognized as the microalgae species with the highest natural accumulation of astaxanthin, which has made it a valuable source for industrial production. Astaxanthin produced by other sources such as chemical synthesis or fermentation are often produced in the cis configuration, which has been shown to have lower bioactivity. Additionally, some sources of astaxanthin, such as shrimp, may denature or degrade when exposed to high temperatures, which can result in a loss of bioactivity. Producing natural astaxanthin through the cultivation of H. pluvialis is presently a demanding and time-consuming task, which incurs high expenses and restricts the cost-effective industrial production of this valuable substance. The production of astaxanthin occurs through two distinct pathways, namely the cytosolic mevalonate pathway and the chloroplast methylerythritol phosphate (MEP) pathway. The latest advancements in enhancing product quality and extracting techniques at a reasonable cost are emphasized in this review. The comparative of specific extraction processes of H. pluvialis biological astaxanthin production that may be applied to large-scale industries were assessed. The article covers a contemporary approach to optimizing microalgae culture for increased astaxanthin content, as well as obtaining preliminary data on the sustainability of astaxanthin production and astaxanthin marketing information.
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Affiliation(s)
- Busakorn Wilawan
- Institut Biologi Sains, Fakulti Sains, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Salaya, Nakhon Pathom, 73170, Thailand
| | - Sook Sin Chan
- Institut Biologi Sains, Fakulti Sains, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Tau Chuan Ling
- Institut Biologi Sains, Fakulti Sains, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Pau Loke Show
- Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection, Wenzhou University, Wenzhou, 325035, China
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, 11800, Penang, Malaysia
| | - Woranart Jonglertjunya
- Fermentation Technology Laboratory (FerTechLab), Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand.
| | - Poomiwat Phadungbut
- Nanocomposite Engineering Laboratory (NanoCEN), Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, 73170, Thailand
| | - Kuan Shiong Khoo
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan.
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602105, India.
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Ng ZY, Ajeng AA, Cheah WY, Ng EP, Abdullah R, Ling TC. Towards circular economy: Potential of microalgae - bacterial-based biofertilizer on plants. J Environ Manage 2024; 349:119445. [PMID: 37890301 DOI: 10.1016/j.jenvman.2023.119445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 10/09/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023]
Abstract
Biofertilizers encompass microorganisms that can be applied to plants, subsequently establishing themselves within the plant's rhizosphere or internal structures. This colonization stimulates plant development by enhancing nutrient absorption from the host. While there is growing literature documenting the applications of microalgae-based and bacterial-based biofertilizers, the research focusing on the effectiveness of consortia formed by these microorganisms as short-term plant biofertilizers is notably insufficient. This study seeks to assess the effectiveness of microalgae-bacterial biofertilizers in promoting plant growth and their potential contribution to the circular economy. The review sheds light on the impact of microalgae-bacterial biofertilizers on plant growth parameters, delving into factors influencing their efficiency, microalgae-bacteria interactions, and effects on soil health. The insights from this review are poised to offer valuable guidance to stakeholders in agriculture, including farmers, environmental technologists, and businesses. These insights will aid in the development and investment in more efficient and sustainable methods for enhancing crop yields, aligning with the Sustainable Development Goals and principles of the circular economy.
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Affiliation(s)
- Zheng Yang Ng
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Aaronn Avit Ajeng
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Wai Yan Cheah
- Centre for Research in Development, Social and Environment (SEEDS) Faculty of Social Sciences and Humanities, Universiti Kebangsaan Malaysia, 43600, UKM, Bangi, Selangor Darul Ehsan, Malaysia.
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, USM, Penang, 11800, Malaysia
| | - Rosazlin Abdullah
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Appaturi JN, Maireles-Torres P, Alomar TS, AlMasoud N, El-Bahy ZM, Ling TC, Ng EP. Highly Active Nickel (II) Oxide-Supported Cerium Oxide Catalysts for Valorization of Glycerol into Oxygenated Fuel Additives. Materials (Basel) 2023; 16:4713. [PMID: 37445026 DOI: 10.3390/ma16134713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/22/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023]
Abstract
Acetylation of glycerol to yield monoacetin (MAT), diacetin (DAT), and triacetin (TAT) over NiO-supported CeO2 (xNiO/CeO2) catalysts is reported. The catalysts were synthesized utilizing a sol-gel technique, whereby different quantities of NiO (x = 9, 27, and 45 wt%) were supported onto the CeO2 substrate, and hexadecyltrimethylammonium bromide (CTABr) served as a porogen. The utilization of EDX elemental mapping analysis confirmed the existence of evenly distributed Ni2+ ion and octahedral NiO nanoparticles on the CeO2 surface through the DRS UV-Vis spectroscopy. The most active catalyst is 27NiO/CeO2 based on TAT selectivity in the glycerol acetylation with ethanoic acid, attaining 97.6% glycerol conversion with 70.5% selectivity to TAT at 170 °C with a 1:10 glycerol/ethanoic acid molar ratio for 30 min using a non-microwave instant heating reactor. The 27NiO/CeO2 is reusable without significant decline in catalytic performance after ten consecutive reaction cycles, indicating high structure stability with accessible active acidity.
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Affiliation(s)
- Jimmy Nelson Appaturi
- School of Biological Sciences, Universiti Sains Malaysia, Gelugor 11800, Penang, Malaysia
| | - Pedro Maireles-Torres
- Departamento de Química Inorgánica Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias Campus de Teatinos, Universidad de Málaga, 29071 Málaga, Spain
| | - Taghrid S Alomar
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Najla AlMasoud
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Zeinhom M El-Bahy
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, Gelugor 11800, Penang, Malaysia
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Ma YK, Alomar TS, AlMasoud N, El-Bahy ZM, Chia S, Daou TJ, Khoerunnisa F, Ling TC, Ng EP. Effects of Synthesis Variables on SAPO-34 Crystallization Templated Using Pyridinium Supramolecule and Its Catalytic Activity in Microwave Esterification Synthesis of Propyl Levulinate. Catalysts 2023. [DOI: 10.3390/catal13040680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
A detailed investigation of the hydrothermal crystallization of SAPO-34 in the presence of the novel 1-propylpyridinium hydroxide ([PrPy]OH) organic structural directing agent is presented. The synthesis conditions are systematically tuned to investigate the effects of various parameters (viz. concentrations of each reactant, crystallization time, and temperature) on the nucleation and crystallization of SAPO-34. The results show that a careful variation in each of the synthesis parameters results in the formation of competing phases such as SAPO-5, SAPO-35, and SAPO-36. Pure and fully crystalline SAPO-34 can be crystallized using a precursor hydrogel of a molar ratio of 2.0 Al: 4.7 P: 0.9 Si: 6.7 [PrPy]OH: 148 H2O at 200 °C for only 19 h, which is a shorter time than that found in previous studies. The prepared SAPO-34 is also very active in the esterification of levulinic acid and 1-propanol. By using microwave heating, 91.5% conversion with 100% selectivity toward propyl levulinate is achieved within 20 min at 190 °C. Hence, the present study may open a new insight into the optimum synthesis study of other zeolites using novel pyridinium organic moieties and the opportunity of replacing conventional harmful and non-recyclable homogeneous catalysts in levulinate biofuel synthesis.
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Affiliation(s)
- Yik-Ken Ma
- School of Chemical Sciences, Universiti Sains Malaysia, USM, Penang 11800, Malaysia
| | - Taghrid S. Alomar
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Najla AlMasoud
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Zeinhom M. El-Bahy
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt
| | - Stephen Chia
- Centre for Global Archaeological Research, Universiti Sains Malaysia, USM, Penang 11800, Malaysia
| | - T. Jean Daou
- Axe Matériaux à Porosités Contrôlées, Institut de Science de Matériaux de Mulhouse UMR 7361, ENSCMu, Université de Haute-Alsace, 3b Rue Alfred Werner, 68093 Mulhouse, France
- Université de Strasbourg, 67000 Strasbourg, France
| | - Fitri Khoerunnisa
- Chemistry Education Department, Universitas Pendidikan Indonesia, Jl. Setiabudhi 258, Bandung 40514, Indonesia
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, USM, Penang 11800, Malaysia
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Zhuang D, He N, Khoo KS, Ng EP, Chew KW, Ling TC. Application progress of bioactive compounds in microalgae on pharmaceutical and cosmetics. Chemosphere 2022; 291:132932. [PMID: 34798100 DOI: 10.1016/j.chemosphere.2021.132932] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 10/31/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
Microalgae is an autotrophic organism with fast growth, short reproduction cycle, and strong environmental adaptability. In recent years, microalgae and the bioactive ingredients extracted from microalgae are regarded as potential substitutes for raw materials in the pharmaceutical and the cosmetics industry. In this review, the characteristics and efficacy of the high-value components of microalgae are discussed in detail, along with the sources and extraction technologies of algae used to obtain high-value ingredients are reviewed. Moreover, the latest trends in biotherapy based on high-value algae extracts as materials are discussed. The excellent antioxidant properties of microalgae derivatives are regarded as an attractive replacement for safe and environmentally friendly cosmetics formulation and production. Through further studies, the mechanism of microalgae bioactive compounds can be understood better and reasonable clinical trials conducted can safely conclude the compliance of microalgae-derived drugs or cosmetics to be necessary standards to be marketed.
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Affiliation(s)
- Dingling Zhuang
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Ning He
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China
| | - Kuan Shiong Khoo
- Faculty of Applied Sciences, UCSI University. No. 1, Jalan Menara Gading, UCSI Heights, 56000, Cheras, Kuala Lumpur, Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, 11800, USM, Penang, Malaysia
| | - Kit Wayne Chew
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China; School of Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900, Sepang, Selangor Darul Ehsan, Malaysia.
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
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Khoerunnisa F, Nurhayati M, Annisa NAA, Fatimah S, Nashrah N, Hendrawan H, Ko YG, Ng EP, Opaprakasit P. Effects of Benzalkonium Chloride Contents on Structures, Properties, and Ultrafiltration Performances of Chitosan-Based Nanocomposite Membranes. Membranes 2022; 12:membranes12030268. [PMID: 35323744 PMCID: PMC8952018 DOI: 10.3390/membranes12030268] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 02/05/2022] [Accepted: 02/07/2022] [Indexed: 02/05/2023]
Abstract
The effects of benzalkonium chloride (BKC) contents on the structure, properties, and ultrafiltration performance of chitosan-based nanocomposite membranes containing poly(ethylene glycol) and multi-walled carbon nanotube (chitosan/BKC/PEG/CNT) were examined. The membranes were prepared by a mixing solution method and phase inversion before being characterized with microscopic techniques, tensile tests, thermogravimetric analysis, water contact angle, and porosity measurements. The performance of the nanocomposite membranes in regard to permeability (flux) and permselectivity (rejection) was examined. The results show that the incorporation of BKC produced nanocomposite membranes with smaller pore structures and improved physico-chemical properties, such as an increase in porosity and surface roughness (Ra = 45.15 to 145.35 nm and Rq = 53.69 to 167.44 nm), an enhancement in the elongation at break from 45 to 109%, and an enhancement in the mechanical strength from 31.2 to 45.8 MPa. In contrast, a decrease in the membrane hydrophilicity (water contact angle increased from 56.3 to 82.8°) and a decrease in the average substructure pore size from 32.64 to 10.08 nm were observed. The membrane rejection performances toward Bovine Serum Albumin (BSA) increased with the BKC composition in both dead-end and cross-flow filtration processes. The chitosan/BKC/PEG/CNT nanocomposite membranes have great potential in wastewater treatments for minimizing biofouling without reducing the water purification performance.
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Affiliation(s)
- Fitri Khoerunnisa
- Department of Chemistry, Indonesia University of Education, Setiabudhi 229, Bandung 40154, Indonesia; (M.N.); (N.A.A.A.); (H.H.)
- Correspondence: (F.K.); (P.O.)
| | - Mita Nurhayati
- Department of Chemistry, Indonesia University of Education, Setiabudhi 229, Bandung 40154, Indonesia; (M.N.); (N.A.A.A.); (H.H.)
| | - Noor Azmi Aulia Annisa
- Department of Chemistry, Indonesia University of Education, Setiabudhi 229, Bandung 40154, Indonesia; (M.N.); (N.A.A.A.); (H.H.)
| | - Siti Fatimah
- School of Material Science & Engineering, Yeungnam University, Gyeongsan 38541, Korea; (S.F.); (N.N.); (Y.-G.K.)
| | - Nisa Nashrah
- School of Material Science & Engineering, Yeungnam University, Gyeongsan 38541, Korea; (S.F.); (N.N.); (Y.-G.K.)
| | - Hendrawan Hendrawan
- Department of Chemistry, Indonesia University of Education, Setiabudhi 229, Bandung 40154, Indonesia; (M.N.); (N.A.A.A.); (H.H.)
| | - Young-Gun Ko
- School of Material Science & Engineering, Yeungnam University, Gyeongsan 38541, Korea; (S.F.); (N.N.); (Y.-G.K.)
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, USM, Penang 11800, Malaysia;
| | - Pakorn Opaprakasit
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology (SIIT), Thammasat University, Khlong Luang 12121, Thailand
- Correspondence: (F.K.); (P.O.)
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Khoerunnisa F, Sihombing M, Nurhayati M, Dara F, Triadi HA, Nasir M, Hendrawan H, Pratiwi A, Ng EP, Opaprakasit P. Poly(ether sulfone)-based ultrafiltration membranes using chitosan/ammonium chloride to enhance permeability and antifouling properties. Polym J 2022. [DOI: 10.1038/s41428-021-00607-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Khoerunnisa F, Kulsum C, Dara F, Nurhayati M, Nashrah N, Fatimah S, Pratiwi A, Hendrawan H, Nasir M, Ko YG, Ng EP, Opaprakasit P. Toughened chitosan-based composite membranes with antibiofouling and antibacterial properties via incorporation of benzalkonium chloride. RSC Adv 2021; 11:16814-16822. [PMID: 35479121 PMCID: PMC9031719 DOI: 10.1039/d1ra01830b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 04/28/2021] [Indexed: 12/01/2022] Open
Abstract
Biofouling due to biofilm formation is a major problem in ultrafiltration membrane applications. In this work, a potential approach to solve this issue has been developed by functionalization of chitosan-based membranes with benzalkonium chloride (BKC). The chitosan composite membranes consisting of poly(ethylene glycol) (PEG), multiwalled carbon nanotubes (MWCNT), and BKC were synthesized by mixing the membrane precursors and the antibacterial solution, and casting via an inversed phase technique. The effects of the BKC content on the morphology and performance of the membranes are investigated by varying the BKC feed compositions. The composite membranes demonstrate better antibacterial efficacy against Staphylococcus aureus than Escherichia coli. The permeability and selectivity performances of the composites as filter membranes are examined by employing a dead-end filtration system. Interestingly, enhanced toughness of the membranes is observed as a function of the BKC content. Mechanisms of the structural formation are investigated. The results from SEM, XRD, and FTIR spectroscopy revealed that MWCNT/BKC are located as nanoclusters with π–π stacking interactions, and are covered by PEG chains. The shape of the dispersed domains is spherical at low BKC contents, but becomes elongated at high BKC contents. These act as soft domains with an anisotropic shape with toughening of the brittle chitosan matrix, leading to enhanced durability of the membranes, especially in ultrafiltration applications. The composite membranes also demonstrate improved rejection in dead-end ultrafiltration systems due to high porosity, high hydrophilicity, and the positive charges of the membrane surface. Chitosan/PEG/MWCNT/BKC membranes exhibit enhanced antibiofouling properties against S. aureus and E. coli. MWCNT/BKC are located as dispersed nano-clusters with π–π stacking interactions in the chitosan matrix, and are coved by PEG chains.![]()
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Tabandeh M, Cheng CK, Centi G, Show PL, Chen WH, Ling TC, Ong HC, Ng EP, Juan JC, Lam SS. Recent advancement in deoxygenation of fatty acids via homogeneous catalysis for biofuel production. Molecular Catalysis 2020. [DOI: 10.1016/j.mcat.2020.111207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Marina PE, Ali GA, See LM, Teo EYL, Ng EP, Chong KF. In situ growth of redox-active iron-centered nanoparticles on graphene sheets for specific capacitance enhancement. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.02.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Derakhshankhah H, Hosseini A, Taghavi F, Jafari S, Lotfabadi A, Ejtehadi MR, Shahbazi S, Fattahi A, Ghasemi A, Barzegari E, Evini M, Saboury AA, Shahri SMK, Ghaemi B, Ng EP, Awala H, Omrani F, Nabipour I, Raoufi M, Dinarvand R, Shahpasand K, Mintova S, Hajipour MJ, Mahmoudi M. Molecular interaction of fibrinogen with zeolite nanoparticles. Sci Rep 2019; 9:1558. [PMID: 30733474 PMCID: PMC6367512 DOI: 10.1038/s41598-018-37621-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 12/10/2018] [Indexed: 01/16/2023] Open
Abstract
Fibrinogen is one of the key proteins that participate in the protein corona composition of many types of nanoparticles (NPs), and its conformational changes are crucial for activation of immune systems. Recently, we demonstrated that the fibrinogen highly contributed in the protein corona composition at the surface of zeolite nanoparticles. Therefore, understanding the interaction of fibrinogen with zeolite nanoparticles in more details could shed light of their safe applications in medicine. Thus, we probed the molecular interactions between fibrinogen and zeolite nanoparticles using both experimental and simulation approaches. The results indicated that fibrinogen has a strong and thermodynamically favorable interaction with zeolite nanoparticles in a non-cooperative manner. Additionally, fibrinogen experienced a substantial conformational change in the presence of zeolite nanoparticles through a concentration-dependent manner. Simulation results showed that both E- and D-domain of fibrinogen are bound to the EMT zeolite NPs via strong electrostatic interactions, and undergo structural changes leading to exposing normally buried sequences. D-domain has more contribution in this interaction and the C-terminus of γ chain (γ377-394), located in D-domain, showed the highest level of exposure compared to other sequences/residues.
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Affiliation(s)
- Hossein Derakhshankhah
- Nano Drug Delivery Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Pharmacutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Atiyeh Hosseini
- Institute for Nanoscience and Nanotechnology and Center of Excellence in Complex Systems and Condensed Matter (CSCM), Sharif University of Technology, Tehran, 1458889694, Iran
| | - Fereshteh Taghavi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Samira Jafari
- Pharmacutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Alireza Lotfabadi
- Nano Drug Delivery Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Pharmacutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Mohammad Reza Ejtehadi
- Department of Physics, Sharif University of Technology, P. O. Box 11155-9161, Tehran, Iran
- Center of Excellence in Complex Systems and Condensed Matter (CSCM), Sharif University of Technology, Tehran, 1458889694, Iran
| | - Sahba Shahbazi
- School of Biology College of Science, University of Tehran, Tehran, Iran
| | - Ali Fattahi
- Pharmacutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Atiyeh Ghasemi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Ebrahim Barzegari
- Pharmacutical Sciences Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mina Evini
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Seyed Mehdi Kamali Shahri
- Department of Chemical Engineering, Pennsylvania State University, University Park, PA, 16802, United States
| | - Behnaz Ghaemi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine (SATiM), Tehran University of Medical Sciences, Tehran, 1417755469, Iran
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, Gelugor, 11800 USM, Malaysia
| | - Hussein Awala
- Laboratory of Catalysis and Spectroscopy, ENSICAEN, University of Caen, CNRS, 6 Boulevard du Marechal Juin, 14050, Caen, France
| | - Fatemeh Omrani
- Persian Gulf Marine Biotechnology Research Center, the Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, 75147, Iran
| | - Iraj Nabipour
- Persian Gulf Marine Biotechnology Research Center, the Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, 75147, Iran
| | - Mohammad Raoufi
- Nanotechnology Research Center, Faculty of Pharmacy, Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, 13169-43551, Iran
| | - Rassoul Dinarvand
- Nanotechnology Research Center, Faculty of Pharmacy, Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, 13169-43551, Iran
| | - Koorosh Shahpasand
- Department of Brain and Cognitive Sciences, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Svetlana Mintova
- Laboratory of Catalysis and Spectroscopy, ENSICAEN, University of Caen, CNRS, 6 Boulevard du Marechal Juin, 14050, Caen, France.
| | - Mohammad Javad Hajipour
- Persian Gulf Marine Biotechnology Research Center, the Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, 75147, Iran.
- Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, 13169-43551, Iran.
| | - Morteza Mahmoudi
- Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02115, United States.
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Choo MY, Juan JC, Oi LE, Ling TC, Ng EP, Rahman Noorsaadah A, Centi G, Lee KT. The role of nanosized zeolite Y in the H2-free catalytic deoxygenation of triolein. Catal Sci Technol 2019. [DOI: 10.1039/c8cy01877d] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reduction in zeolite Y crystal size has improved the triolein conversion, yield of deoxygenated product and diesel range hydrocarbon selectivity.
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Affiliation(s)
- Min-Yee Choo
- Nanotechnology and Catalysis Research Center (NANOCAT)
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
- Institute of Biological Sciences
| | - Joon Ching Juan
- Nanotechnology and Catalysis Research Center (NANOCAT)
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
- Monash University
| | - Lee Eng Oi
- Nanotechnology and Catalysis Research Center (NANOCAT)
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Tau Chuan Ling
- Institute of Biological Sciences
- Faculty of Science, University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences
- Universiti Sains Malaysia
- Penang
- Malaysia
| | | | - Gabriele Centi
- University of Messina
- ERIC aisbl and CASPE/INSTM
- Departments ChiBioFarAm and MIFT
- 98166 Messina
- Italy
| | - Keat Teong Lee
- School of Chemical Engineering
- Universiti Sains Malaysia
- Penang
- Malaysia
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13
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Ng EP, Mohammad S AG, Rigolet S, Daou TJ, Mintova S, Ling TC. Micro- and macroscopic observations of the nucleation process and crystal growth of nanosized Cs-pollucite in an organotemplate-free hydrosol. NEW J CHEM 2019. [DOI: 10.1039/c9nj03151k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nucleation and crystal growth of a nanosized cesium pollucite zeolite from an organotemplate-free hydrosol under mild conditions (low pressure and temperature) are followed and reported.
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Affiliation(s)
- Eng-Poh Ng
- School of Chemical Sciences
- Universiti Sains Malaysia
- Malaysia
| | - Aleid Ghadah Mohammad S
- School of Chemical Sciences
- Universiti Sains Malaysia
- Malaysia
- Department of Chemistry (Preparatory Year)
- Faculty of Science
| | - Severinne Rigolet
- Université de Haute-Alsace
- Axe Matériaux à Porosités Contrôlées
- Institut de Science de Matériaux de Mulhouse UMR 7361
- ENSCMu
- 68093 Mulhouse
| | - T. Jean Daou
- Université de Haute-Alsace
- Axe Matériaux à Porosités Contrôlées
- Institut de Science de Matériaux de Mulhouse UMR 7361
- ENSCMu
- 68093 Mulhouse
| | | | - Tau Chuan Ling
- Institute of Biological Sciences
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
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14
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Choo MY, Oi LE, Show PL, Chang JS, Ling TC, Ng EP, Phang SM, Juan JC. Recent progress in catalytic conversion of microalgae oil to green hydrocarbon: A review. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.06.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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15
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Ng EP, Chow JH, Wong SF, Mukti RR, Muraza O, Ling TC, Wong KL. Alkali Metal Ion-Exchanged Zeolite X from Bamboo Leaf Biomass as Base Catalysts in Cyanoethylation of Methanol Enhanced by Non-Microwave Instant Heating. Aust J Chem 2017. [DOI: 10.1071/ch17168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A series of alkali form (Na, K, Cs, and Ca) faujisite X-type zeolites were prepared from bamboo leaf ash, which was derived from bamboo agricultural waste. The XRD and SEM results revealed that the zeolite structure remained intact after ion exchange treatment. A very high degree of ion exchange (≥ 85 %) was achieved in all of the prepared zeolite samples. The zeolite samples were tested in a solvent-free cyanoethylation reaction of methanol under an instant heating environment that mimicked microwave fast heating, which was explored for the first time. The catalytic performances of the zeolite samples were well correlated with their surface basicity, which was characterised by pyrrole adsorption followed by in situ infrared spectroscopy. The CsX zeolite showed excellent catalytic performance (~97 % reactant conversion and 100 % product selectivity within 15 min), which was comparable to the microwave-assisted system and superior to the normal reflux system. The catalytic activity of the CsX zeolite was retained even after 10 cycles of reaction.
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16
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Chow YH, Yap YJ, Show PL, Juan JC, Anuar MS, Ng EP, Ooi CW, Ling TC. Characterization of partitioning behaviors of immunoglobulin G in polymer-salt aqueous two-phase systems. J Biosci Bioeng 2016; 122:613-619. [DOI: 10.1016/j.jbiosc.2016.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 01/22/2016] [Accepted: 04/21/2016] [Indexed: 12/13/2022]
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17
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Tang MSY, Ng EP, Juan JC, Ooi CW, Ling TC, Woon KL, Show PL. Metallic and semiconducting carbon nanotubes separation using an aqueous two-phase separation technique: a review. Nanotechnology 2016; 27:332002. [PMID: 27396920 DOI: 10.1088/0957-4484/27/33/332002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
It is known that carbon nanotubes show desirable physical and chemical properties with a wide array of potential applications. Nonetheless, their potential has been hampered by the difficulties in acquiring high purity, chiral-specific tubes. Considerable advancement has been made in terms of the purification of carbon nanotubes, for instance chemical oxidation, physical separation, and myriad combinations of physical and chemical methods. The aqueous two-phase separation technique has recently been demonstrated to be able to sort carbon nanotubes based on their chirality. The technique requires low cost polymers and salt, and is able to sort the tubes based on their diameter as well as metallicity. In this review, we aim to provide a review that could stimulate innovative thought on the progress of a carbon nanotubes sorting method using the aqueous two-phase separation method, and present possible future work and an outlook that could enhance the methodology.
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Affiliation(s)
- Malcolm S Y Tang
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia. Low Dimensional Material Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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18
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Yee KF, Ng EP, Mohamed AR, Adam F, Tan SH. Functionalized Multi-Walled Carbon Nanotubes as Heterogeneous Lewis Acid Catalysts in the Etherification Reaction of tert-Butyl Alcohol and Ethanol. CHEM ENG COMMUN 2016. [DOI: 10.1080/00986445.2016.1198334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Kian Fei Yee
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Penang, Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Abdul Rahman Mohamed
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Penang, Malaysia
| | - Farook Adam
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Soon Huat Tan
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Penang, Malaysia
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19
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Teo EYL, Muniandy L, Ng EP, Adam F, Mohamed AR, Jose R, Chong KF. High surface area activated carbon from rice husk as a high performance supercapacitor electrode. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.01.140] [Citation(s) in RCA: 303] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Abstract
The ionothermal crystallization of FeAPO-5 molecular sieves in the presence of phosphorous acid (H3PO3) has been investigated.
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Affiliation(s)
- Eng-Poh Ng
- School of Chemical Sciences
- Universiti Sains Malaysia
- , Malaysia
| | - Jia-Pei Ghoy
- School of Chemical Sciences
- Universiti Sains Malaysia
- , Malaysia
| | - Hussein Awala
- Laboratoire Catalyse & Spectrochimie
- CNRS-ENSICAEN
- Université de Caen
- France
| | - Aurélie Vicente
- Laboratoire Catalyse & Spectrochimie
- CNRS-ENSICAEN
- Université de Caen
- France
| | - Rohana Adnan
- School of Chemical Sciences
- Universiti Sains Malaysia
- , Malaysia
| | - Tau Chuan Ling
- Institute of Biological Sciences
- Faculty of Science
- University of Malaya
- Kuala Lumpur, Malaysia
| | - Svetlana Mintova
- Laboratoire Catalyse & Spectrochimie
- CNRS-ENSICAEN
- Université de Caen
- France
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21
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22
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Tan KH, Cham HY, Awala H, Ling TC, Mukti RR, Wong KL, Mintova S, Ng EP. Effect of Extra-Framework Cations of LTL Nanozeolites to Inhibit Oil Oxidation. Nanoscale Res Lett 2015; 10:956. [PMID: 26058517 PMCID: PMC4463947 DOI: 10.1186/s11671-015-0956-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 05/26/2015] [Indexed: 06/04/2023]
Abstract
Lubricant oils take significant part in current health and environmental considerations since they are an integral and indispensable component of modern technology. Antioxidants are probably the most important additives used in oils because oxidative deterioration plays a major role in oil degradation. Zeolite nanoparticles (NPs) have been proven as another option as green antioxidants in oil formulation. The anti-oxidative behavior of zeolite NPs is obvious; however, the phenomenon is still under investigation. Herein, a study of the effect of extra-framework cations stabilized on Linde Type L (LTL) zeolite NPs (ca. 20 nm) on inhibition of oxidation in palm oil-based lubricant oil is reported. Hydrophilic LTL zeolites with a Si/Al ratio of 3.2 containing four different inorganic cations (Li(+), Na(+), K(+), Ca(2+)) were applied. The oxidation of the lubricant oil was followed by visual observation, colorimetry, fourier transform infrared (FTIR) spectroscopy, (1)H NMR spectroscopy, total acid number (TAN), and rheology analyses. The effect of extra-framework cations to slow down the rate of oil oxidation and to control the viscosity of oil is demonstrated. The degradation rate of the lubricant oil samples is decreased considerably as the polarizability of cation is increased with the presence of zeolite NPs. More importantly, the microporous zeolite NPs have a great influence in halting the steps that lead to the polymerization of the oils and thus increasing the lifetime of oils.
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Affiliation(s)
- Kok-Hou Tan
- />School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Hooi-Ying Cham
- />School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Hussein Awala
- />Laboratoire Catalyse & Spectrochimie, CNRS-ENSICAEN, Université de Caen, Caen, France
| | - Tau Chuan Ling
- />Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Rino R Mukti
- />Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Bandung, Indonesia
| | - Ka-Lun Wong
- />Natural Sciences and Science Education, NIE, Nanyang Technological University, Singapore, Singapore
| | - Svetlana Mintova
- />Laboratoire Catalyse & Spectrochimie, CNRS-ENSICAEN, Université de Caen, Caen, France
| | - Eng-Poh Ng
- />School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Tan KH, Awala H, Mukti RR, Wong KL, Rigaud B, Ling TC, Aleksandrov HA, Koleva IZ, Vayssilov GN, Mintova S, Ng EP. Inhibition of palm oil oxidation by zeolite nanocrystals. J Agric Food Chem 2015; 63:4655-4663. [PMID: 25897618 DOI: 10.1021/acs.jafc.5b00380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The efficiency of zeolite X nanocrystals (FAU-type framework structure) containing different extra-framework cations (Li(+), Na(+), K(+), and Ca(2+)) in slowing the thermal oxidation of palm oil is reported. The oxidation study of palm oil is conducted in the presence of zeolite nanocrystals (0.5 wt %) at 150 °C. Several characterization techniques such as visual analysis, colorimetry, rheometry, total acid number (TAN), FT-IR spectroscopy, (1)H NMR spectroscopy, and Karl Fischer analyses are applied to follow the oxidative evolution of the oil. It was found that zeolite nanocrystals decelerate the oxidation of palm oil through stabilization of hydroperoxides, which are the primary oxidation product, and concurrently via adsorption of the secondary oxidation products (alcohols, aldehydes, ketones, carboxylic acids, and esters). In addition to the experimental results, periodic density functional theory (DFT) calculations are performed to elucidate further the oxidation process of the palm oil in the presence of zeolite nanocrystals. The DFT calculations show that the metal complexes formed with peroxides are more stable than the complexes with alkenes with the same ions. The peroxides captured in the zeolite X nanocrystals consequently decelerate further oxidation toward formation of acids. Unlike the monovalent alkali metal cations in the zeolite X nanocrystals (K(+), Na(+), and Li(+)), Ca(2+) reduced the acidity of the oil by neutralizing the acidic carboxylate compounds to COO(-)(Ca(2+))1/2 species.
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Affiliation(s)
- Kok-Hou Tan
- †School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | | | - Rino R Mukti
- §Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Bandung, Indonesia
| | - Ka-Lun Wong
- ⊥National Institute of Education, Nanyang Technological University, Singapore
| | | | - Tau Chuan Ling
- #Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Iskra Z Koleva
- ΔFaculty of Chemistry and Pharmacy, University of Sofia, Sofia, Bulgaria
| | - Georgi N Vayssilov
- ΔFaculty of Chemistry and Pharmacy, University of Sofia, Sofia, Bulgaria
| | | | - Eng-Poh Ng
- †School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Chow YH, Yap YJ, Tan CP, Anuar MS, Tejo BA, Show PL, Ariff AB, Ng EP, Ling TC. Characterization of bovine serum albumin partitioning behaviors in polymer-salt aqueous two-phase systems. J Biosci Bioeng 2014; 120:85-90. [PMID: 25553974 DOI: 10.1016/j.jbiosc.2014.11.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 11/06/2014] [Accepted: 11/26/2014] [Indexed: 10/24/2022]
Abstract
In this paper, a linear relationship is proposed relating the natural logarithm of partition coefficient, ln K for protein partitioning in poly (ethylene glycol) (PEG)-phosphate aqueous two-phase system (ATPS) to the square of tie-line length (TLL(2)). This relationship provides good fits (r(2) > 0.98) to the partition of bovine serum albumin (BSA) in PEG (1450 g/mol, 2000 g/mol, 3350 g/mol, and 4000 g/mol)-phosphate ATPS with TLL of 25.0-50.0% (w/w) at pH 7.0. Results also showed that the plot of ln K against pH for BSA partitioning in the ATPS containing 33.0% (w/w) PEG1450 and 8.0% (w/w) phosphate with varied working pH between 6.0 and 9.0 exhibited a linear relationship which is in good agreement (r(2) = 0.94) with the proposed relationship, ln K = α' pH + β'. These results suggested that both the relationships proposed could be applied to correlate and elucidate the partition behavior of biomolecules in the polymer-salt ATPS. The influence of other system parameters on the partition behavior of BSA was also investigated. An optimum BSA yield of 90.80% in the top phase and K of 2.40 was achieved in an ATPS constituted with 33.0% (w/w) PEG 1450 and 8.0% (w/w) phosphate in the presence of 8.5% (w/w) sodium chloride (NaCl) at pH 9.0 for 0.3% (w/w) BSA load.
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Affiliation(s)
- Yin Hui Chow
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Yee Jiun Yap
- Department of Applied Mathematics, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor Darul Ehsan, Malaysia
| | - Chin Ping Tan
- Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Mohd Shamsul Anuar
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Bimo Ario Tejo
- Center for Infectious Diseases Research, Surya University, JI. Scientia Boulevard Block U/7, Gading Serpong, Tangerang 15810, Banten, Indonesia
| | - Pau Loke Show
- Manufacturing and Industrial Processes Division, Faculty of Engineering, Centre for Food and Bioproduct Processing, University of Nottingham Malaysia Campus, Jalan Broga, Semenyih 43500, Selangor Darul Ehsan, Malaysia
| | - Arbakariya Bin Ariff
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia
| | - Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, Minden 11800, Malaysia
| | - Tau Chuan Ling
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
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Ng HS, Ooi CW, Show PL, Tan CP, Ariff A, Moktar MN, Ng EP, Ling TC. Recovery of Bacillus cereus cyclodextrin glycosyltransferase using ionic liquid-based aqueous two-phase system. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.09.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tan CH, Show PL, Ooi CW, Ng EP, Lan JCW, Ling TC. Novel lipase purification methods - a review of the latest developments. Biotechnol J 2014; 10:31-44. [PMID: 25273633 DOI: 10.1002/biot.201400301] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 08/05/2014] [Accepted: 08/28/2014] [Indexed: 11/05/2022]
Abstract
Microbial lipases are popular biocatalysts due to their ability to catalyse diverse reactions such as hydrolysis, esterification, and acidolysis. Lipases function efficiently on various substrates in aqueous and non-aqueous media. Lipases are chemo-, regio-, and enantio-specific, and are useful in various industries, including those manufacturing food, detergents, and pharmaceuticals. A large number of lipases from fungal and bacterial sources have been isolated and purified to homogeneity. This success is attributed to the development of both conventional and novel purification techniques. This review highlights the use of these techniques in lipase purification, including conventional techniques such as: (i) ammonium sulphate fractionation; (ii) ion-exchange; (iii) gel filtration and affinity chromatography; as well as novel techniques such as (iv) reverse micellar system; (v) membrane processes; (vi) immunopurification; (vi) aqueous two-phase system; and (vii) aqueous two-phase floatation. A summary of the purification schemes for various bacterial and fungal lipases are also provided.
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Affiliation(s)
- Chung Hong Tan
- Department of Chemical and Environmental Engineering, University of Nottingham Malaysia Campus, Jalan Broga, Selangor Darul Ehsan, Malaysia
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Tirtaatmadja N, Mortimer G, Ng EP, Ahmad HA, Mintova S, Serpooshan V, Minchin RF, Mahmoudi M. Nanoparticles-induced inflammatory cytokines in human plasma concentration manner: an ignored factor at the nanobio-interface. J IRAN CHEM SOC 2014. [DOI: 10.1007/s13738-014-0486-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ng EP, Law SP, Mukti RR, Adam F. Metal chlorides supported on chiral mesoporous silica (MClx/CMS) as highly active Lewis acid catalyst for the selective hydroamination of cyclohexene. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2013.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Adam F, Appaturi JN, Ng EP. Halide aided synergistic ring opening mechanism of epoxides and their cycloaddition to CO2 using MCM-41-imidazolium bromide catalyst. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.02.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ng HS, Ooi CW, Mokhtar MN, Show PL, Ariff A, Tan JS, Ng EP, Ling TC. Extractive bioconversion of cyclodextrins by Bacillus cereus cyclodextrin glycosyltransferase in aqueous two-phase system. Bioresour Technol 2013; 142:723-726. [PMID: 23806510 DOI: 10.1016/j.biortech.2013.05.087] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 05/21/2013] [Accepted: 05/23/2013] [Indexed: 06/02/2023]
Abstract
An extractive bioconversion with Bacillus cereus cyclodextrin glycosyltransferase (CGTase, EC 2.4.1.19) in aqueous two-phase system (ATPS) was investigated for the synthesis and recovery of cyclodextrins (CDs). Optimum condition for the extractive bioconversion of CDs was achieved in ATPS consisted of 7.7% (w/w) polyethylene glycol (PEG) 20,000 and 10.3% (w/w) dextran T500 with volume ratio (VR) of 4.0. Enzymatic conversion of starch occurred mainly in dextran-rich bottom phase whereas the product, CDs was transferred to top phase and a higher partition coefficient of CDs was achieved. Repetitive batch of CDs synthesis was employed by replenishment of the top phase components and addition of starch every 8h. An average total CDs concentration of 13.7 mg/mL, (4.77 mg/mLα-CD, 5.02 mg/mLβ-CD and 3.91 mg/mLγ-CD) was recovered in the top phase of PEG 20,000/dextran T500 ATPS. This study showed the effectiveness of ATPS application in extractive bioconversion of CDs synthesis with B. cereus CGTase.
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Affiliation(s)
- Hui Suan Ng
- Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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Ng EP, Goh JY, Ling TC, Mukti RR. Eco-friendly synthesis for MCM-41 nanoporous materials using the non-reacted reagents in mother liquor. Nanoscale Res Lett 2013; 8:120. [PMID: 23497184 PMCID: PMC3599658 DOI: 10.1186/1556-276x-8-120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 02/27/2013] [Indexed: 06/01/2023]
Abstract
Nanoporous materials such as Mobil composite material number 41 (MCM-41) are attractive for applications such as catalysis, adsorption, supports, and carriers. Green synthesis of MCM-41 is particularly appealing because the chemical reagents are useful and valuable. We report on the eco-friendly synthesis of MCM-41 nanoporous materials via multi-cycle approach by re-using the non-reacted reagents in supernatant as mother liquor after separating the solid product. This approach was achieved via minimal requirement of chemical compensation where additional fresh reactants were added into the mother liquor followed by pH adjustment after each cycle of synthesis. The solid product of each successive batch was collected and characterized while the non-reacted reagents in supernatant can be recovered and re-used to produce subsequent cycle of MCM-41. The multi-cycle synthesis is demonstrated up to three times in this research. This approach suggests a low cost and eco-friendly synthesis of nanoporous material since less waste is discarded after the product has been collected, and in addition, product yield can be maintained at the high level.
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Affiliation(s)
- Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, Minden, 11800, Malaysia
| | - Jia-Yi Goh
- School of Chemical Sciences, Universiti Sains Malaysia, Minden, 11800, Malaysia
| | - Tau Chuan Ling
- Faculty of Science, University of Malaya, Kuala Lumpur, 50603, Malaysia
| | - Rino R Mukti
- Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Jl. Ganesha no. 10, Bandung, 40132, Indonesia
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Affiliation(s)
- Eng-Poh Ng
- Laboratoire Catalyse and Spectrochimie, ENSICAEN, Université de Caen, CNRS, 6 Boulevard du Maréchal Juin, 14050 Caen, France
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia
| | - Daniel Chateigner
- CRISMAT, ENSICAEN, Université de Caen, 6 boulevard du Maréchal Juin, 14050 Caen, France
| | - Thomas Bein
- Department of Chemistry and Center for NanoScience, University of Munich (LMU), Butenandtstrasse 5-13 (E) Gerhard-Ertl-Building, 81377 Munich, Germany
| | - Valentin Valtchev
- Laboratoire Catalyse and Spectrochimie, ENSICAEN, Université de Caen, CNRS, 6 Boulevard du Maréchal Juin, 14050 Caen, France
| | - Svetlana Mintova
- Laboratoire Catalyse and Spectrochimie, ENSICAEN, Université de Caen, CNRS, 6 Boulevard du Maréchal Juin, 14050 Caen, France
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Abstract
Small differences between the lattice energies of different zeolites suggest that kinetic factors are of major importance in controlling zeolite nucleation. Thus, it is critical to control the nucleation kinetics in order to obtain a desired microporous material. Here, we demonstrate how careful investigation of the very early stages of zeolite crystallization in colloidal systems can provide access to important nanoscale zeolite phases while avoiding the use of expensive organic templates. We report the effective synthesis of ultrasmall (6- to 15-nanometer) crystals of the large-pore zeolite EMT from template-free colloidal precursors at low temperature (30°C) and very high yield.
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Affiliation(s)
- Eng-Poh Ng
- Laboratoire Catalyse and Spectrochimie, ENSICAEN, Université de Caen, CNRS, 6 Boulevard du Maréchal Juin, 14050 Caen, France
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34
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Ng EP, Mintova S. Quantitative moisture measurements in lubricating oils by FTIR spectroscopy combined with solvent extraction approach. Microchem J 2011. [DOI: 10.1016/j.microc.2011.01.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Abstract
Micro- and macroscopic studies of nucleation and growth processes of MnAlPO-5 nanosized crystals under ionothermal synthesis conditions are reported herein. The samples treated at 150 °C were extracted from the reaction mixture at various stages of crystallization, and characterized by XRD; SEM; thermogravimetric analysis (TGA); (31)P and (27)Al solid-state magic angle spinning (MAS) NMR, Raman, UV/Vis, and X-ray fluorescence spectroscopy (XRF). The starting raw materials (alumina, manganese, and phosphorous) were dissolved completely in the ionic liquid and transformed into an amorphous solid after 5 h of ionothermal treatment. This amorphous solid then undergoes structural changes over the following 5-25 h, which result in an intermediate phase that consists of octahedral Al species linked to the manganese and phosphate species. The first MnAlPO-5 nuclei on the surface of the intermediate can be observed after 50 h ionoheating. These nuclei further grow, as the surface of the intermediate is in full contact with the ionic liquid, to give crystalline MnAlPO-5 nanoparticles with a mean diameter of 80 nm. The crystals become fully detached from the intermediate and are then liberated as discrete particles after 90 h heating. The transformation process from amorphous to intermediate and then to the crystalline MnAlPO-5 nanoparticles shows that nucleation starts at the solid-liquid interface and continues through surface-to-core reversed-growth until the entire amorphous solid is transformed into discrete nanocrystals.
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Affiliation(s)
- Eng-Poh Ng
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, Malaysia
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36
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Abstract
Discrete MnAlPO-5 nanocrystals with monomodal particle size distribution (diameter of 80 nm) were synthesized using an ionothermal technique; the pore filling effect of the ionic liquid molecules during the synthesis of microporous nanocrystals is verified.
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Affiliation(s)
- Eng-Poh Ng
- Laboratoire de Matériaux à Porosité Contrôlée, UMR-7016 CNRS, ENSCMu, Université de Haute Alsace, 3 rue Alfred Werner, 68093 Mulhouse, France
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37
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Abstract
Long live lubricants: The selective capture of water from lubricants using nanosized microporous aluminophosphate (AEI) and aluminosilicate materials was studied. Nearly 98 % of the moisture was removed from the lubricating oil under ambient conditions, resulting in a significant improvement in the lubricating service lifetime. Moreover, both the lubricant and the microporous sorbents can be recovered and reused.The selective capture of water from lubricants using nanosized microporous aluminophosphate and aluminosilicate materials was studied with an aim to increase the lifetime of the lubricating mineral oil. The amount of water present in oxidized lubricating oil before and after treatment with microporous materials was studied by FTIR spectroscopy and determined quantitatively using the Karl Fischer titration method. Nanosized aluminophosphate revealed a high selectivity for water without adsorbing other additives, in contrast to nanosized aluminosilicates which also adsorb polar oxidation products and ionic additives. About 98 % of the initial moisture could be removed from the lubricating oil under ambient conditions, resulting in a significant improvement in the lubricating service lifetime. Moreover, no by-products are formed during the process and both the lubricant and the sorbents can be recovered and reused, thus the method is environmentally friendly.
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Affiliation(s)
- Eng-Poh Ng
- Laboratoire Catalyse & Spectrochimie, ENSICAEN-Université de Caen-CNRS, 6 boulevard du Maréchal Juin, Caen, France
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