1
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Wang X, Xiao B, Yang G, Chen J, Liu W. Enzymatic preparation of phytosterol esters with fatty acids from high-oleic sunflower seed oil using response surface methodology. RSC Adv 2021; 11:15204-15212. [PMID: 35424029 PMCID: PMC8698641 DOI: 10.1039/d1ra01486b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/05/2021] [Indexed: 11/21/2022] Open
Abstract
Phytosterol esters are functional compounds that can effectively reduce plasma cholesterol concentration, and have wide applications in the food industry. In this study, a simple and efficient enzymatic method was successfully applied to synthesize phytosterol oleic acid esters with fatty acids from high-oleic sunflower seed oil. Among the tested lipases, Candida rugosa lipase (CRL) exhibited higher catalytic activity in the esterification of phytosterols with fatty acids (oleic acid 84%) from high-oleic sunflower seed oil. Box-Behnken design and response surface methodology were used to investigate the influence of reaction factors on the conversion of phytosterols. The maximum conversion of phytosterols (96.8%) and yield of phytosterol esters (92%) could be obtained under optimal conditions: reaction temperature 50 °C, a molar ratio of phytosterols to fatty acids at 1 : 2.3, enzyme loading of 5.8%, isooctane volume of 2 mL and reaction time of 2 h. It was noteworthy that this enzymatic esterification method indeed expended a much shorter reaction time (2 h) than that observed in previous reports. In general, the enzymatic preparation of phytosterol oleic acid esters with fatty acids from high-oleic sunflower seed oil will be a simple and rapid method for producing unsaturated fatty acid esters of phytosterol with both higher oil solubility and oxidative stability, which is beneficial as functional food ingredients.
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Affiliation(s)
- Xiaoping Wang
- College of Food Science and Technology, Henan University of Technology Lianhua Street 100 Zhengzhou 450001 Henan Province P. R. China +86-371-67758022 +86-371-67758022
| | - Bing Xiao
- College of Food Science and Technology, Henan University of Technology Lianhua Street 100 Zhengzhou 450001 Henan Province P. R. China +86-371-67758022 +86-371-67758022
| | - Guolong Yang
- College of Food Science and Technology, Henan University of Technology Lianhua Street 100 Zhengzhou 450001 Henan Province P. R. China +86-371-67758022 +86-371-67758022
| | - Jingnan Chen
- College of Food Science and Technology, Henan University of Technology Lianhua Street 100 Zhengzhou 450001 Henan Province P. R. China +86-371-67758022 +86-371-67758022
| | - Wei Liu
- College of Food Science and Technology, Henan University of Technology Lianhua Street 100 Zhengzhou 450001 Henan Province P. R. China +86-371-67758022 +86-371-67758022
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2
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da Silva JAP, Bönmann VC, Kuamoto DT, Ferreira AL, Petzhold CL, Cardozo NSM. Glycerolysis of Buriti Oil (
Mauritia flexuosa
) by Magnesium Oxide and Immobilized Lipase Catalysts: Reaction Yield and Carotenoids Degradation. J AM OIL CHEM SOC 2021. [DOI: 10.1002/aocs.12469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- João Antônio Pessoa da Silva
- Laboratório de Tecnologia de Polímeros—LATEP, Departamento de Engenharia Química Universidade Federal do Rio Grande do Sul (UFRGS) R. Eng. Luiz Englert, s/n. Campus Central. CEP 90040‐040 Porto Alegre RS Brazil
| | - Victória Castro Bönmann
- Laboratório de Tecnologia de Polímeros—LATEP, Departamento de Engenharia Química Universidade Federal do Rio Grande do Sul (UFRGS) R. Eng. Luiz Englert, s/n. Campus Central. CEP 90040‐040 Porto Alegre RS Brazil
| | - Douglas Takeshi Kuamoto
- Laboratório de Tecnologia de Polímeros—LATEP, Departamento de Engenharia Química Universidade Federal do Rio Grande do Sul (UFRGS) R. Eng. Luiz Englert, s/n. Campus Central. CEP 90040‐040 Porto Alegre RS Brazil
| | - Amanda Lopes Ferreira
- Laboratório de Tecnologia de Polímeros—LATEP, Departamento de Engenharia Química Universidade Federal do Rio Grande do Sul (UFRGS) R. Eng. Luiz Englert, s/n. Campus Central. CEP 90040‐040 Porto Alegre RS Brazil
| | - Cesar Liberato Petzhold
- Laboratório de Síntese Orgânica e Polímeros, Instituto de Química Universidade Federal do Rio Grande do Sul (UFRGS) Avenida Bento Gonçalves, 9500, CP 15003, CEP 91501‐970 Porto Alegre RS Brazil
| | - Nilo Sérgio Medeiros Cardozo
- Laboratório de Tecnologia de Polímeros—LATEP, Departamento de Engenharia Química Universidade Federal do Rio Grande do Sul (UFRGS) R. Eng. Luiz Englert, s/n. Campus Central. CEP 90040‐040 Porto Alegre RS Brazil
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3
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Abreu Silveira E, Moreno-Perez S, Basso A, Serban S, Pestana-Mamede R, Tardioli PW, Farinas CS, Castejon N, Fernandez-Lorente G, Rocha-Martin J, Guisan JM. Biocatalyst engineering of Thermomyces Lanuginosus lipase adsorbed on hydrophobic supports: Modulation of enzyme properties for ethanolysis of oil in solvent-free systems. J Biotechnol 2019; 289:126-134. [DOI: 10.1016/j.jbiotec.2018.11.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 11/14/2018] [Accepted: 11/19/2018] [Indexed: 01/08/2023]
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4
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Martínez-Ruiz A, Tovar-Castro L, García HS, Saucedo-Castañeda G, Favela-Torres E. Continuous ethyl oleate synthesis by lipases produced by solid-state fermentation by Rhizopus microsporus. BIORESOURCE TECHNOLOGY 2018; 265:52-58. [PMID: 29879651 DOI: 10.1016/j.biortech.2018.05.080] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/19/2018] [Accepted: 05/21/2018] [Indexed: 06/08/2023]
Abstract
Lipases produced by solid-state fermentation were used directly as biocatalysts for continuous synthesis of ethyl oleate in a continuously stirred tank reactor. The effect of biocatalyst reutilisation, molar ratio of substrates, agitation rate and feed rate on the esterification of oleic acid with ethanol were investigated. The catalyst maintained 90% conversion for four batch cycles with a 1:2 molar ratio (oleic acid:ethanol). Mechanical agitation at 200 and 300 rpm during 12 h of continuous reaction did not affect the biocatalytic conversion, allowing substrate conversions greater than 90% that were obtained with 50 mM oleic acid at a molar ratio of 1:2 during 14 h reaction. In contrast, substrate conversion was 70% with 100 mM oleic acid at a flow rate of 2 mL/min during 25 h of reaction. These results are promising and offer a technical alternative for the development of accessible biocatalysts that can be used in continuous operations.
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Affiliation(s)
- Antonio Martínez-Ruiz
- Departamento de Biotecnología, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Mexico City C.P. 09340, Mexico
| | - Luz Tovar-Castro
- Departamento de Sistemas Biológicos, Universidad Autónoma Metropolitana Xochimilco, Calzada del Hueso 1100, Col. Villa Quietud, Delegación Coyoacán, Mexico City C.P. 04960, Mexico
| | - Hugo Sergio García
- Instituto Tecnológico de Veracruz, Calzada Miguel Ángel de Quevedo 2779, Col. Formando Hogar, Veracruz C.P. 91897, Mexico
| | - Gerardo Saucedo-Castañeda
- Departamento de Biotecnología, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Mexico City C.P. 09340, Mexico
| | - Ernesto Favela-Torres
- Departamento de Biotecnología, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Mexico City C.P. 09340, Mexico.
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5
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Martin LS, Ceron A, Oliveira PC, Zanin GM, de Castro HF. Different organic components on silica hybrid matrices modulate the lipase inhibition by the glycerol formed in continuous transesterification reactions. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.01.029] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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6
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Immobilization of Y. lipolytica lipase and the continuous synthesis of geranyl propionate. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2017.01.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Wang L, Li J, Zhao X, Qian C, Wei G, Zhu B, Liu C. Expression and characterization of a lipase-related protein in the malpighian tubules of the Chinese oak silkworm, Antheraea pernyi. BULLETIN OF ENTOMOLOGICAL RESEARCH 2016; 106:615-623. [PMID: 27297450 DOI: 10.1017/s0007485316000365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Lipases are ubiquitous enzymes in nature, which play a crucial role in fat metabolism by catalyzing the hydrolysis of triacylglycerol to free fatty acids and glycerol. However, reports concerning insect lipase are rare. In this study, we studied the expression and activity of a lipase-related protein from Antheraea pernyi (ApLRP). Recombinant ApLRP was expressed in Escherichia coli cells and used to raise rabbit anti-ApLRP polyclonal antibodies. ApLRP mRNA and protein expression were abundant in the midgut and malpighian tubules, respectively. After challenge with four different microorganisms (E. coli, Beauveria bassiana, Micrococcus luteus and nuclear polyhedrosis virus), the expression levels of ApLRP mRNA in midgut were inducted significantly compared with the control. The different pathogens induced different ApLRP gene expression patterns. The optimum temperature and pH for the enzyme's activity were 35°C and 7.0, respectively. ApLRP activity was stimulated in the presence of Mg2+, Na+, Ca2+ and b-mercaptoethanol; while Zn2+, Cu2+ and Fe3+ inhibited its activity. Detergents such as SDS, glycerol and Tween-20 increased the lipase activity by 20-30%. Our results indicated that ApLRP might play an important role in the innate immunity of insects.
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Affiliation(s)
- L Wang
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - J Li
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - X Zhao
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - C Qian
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - G Wei
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - B Zhu
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
| | - C Liu
- College of Life Science, Anhui Agricultural University,Hefei 230036,China
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8
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Navarro López E, Robles Medina A, González Moreno PA, Esteban Cerdán L, Molina Grima E. Extraction of microalgal lipids and the influence of polar lipids on biodiesel production by lipase-catalyzed transesterification. BIORESOURCE TECHNOLOGY 2016; 216:904-913. [PMID: 27323242 DOI: 10.1016/j.biortech.2016.06.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 06/09/2016] [Accepted: 06/10/2016] [Indexed: 06/06/2023]
Abstract
In order to obtain microalgal saponifiable lipids (SLs) fractions containing different polar lipid (glycolipids and phospholipids) contents, SLs were extracted from wet Nannochloropsis gaditana microalgal biomass using seven extraction systems, and the polar lipid contents of some fractions were reduced by low temperature acetone crystallization. We observed that the polar lipid content in the extracted lipids depended on the polarity of the first solvent used in the extraction system. Lipid fractions with polar lipid contents between 75.1% and 15.3% were obtained. Some of these fractions were transformed into fatty acid methyl esters (FAMEs, biodiesel) by methanolysis, catalyzed by the lipases Novozym 435 and Rhizopus oryzae in tert-butanol medium. We observed that the reaction velocity was higher the lower the polar lipid content, and that the final FAME conversions achieved after using the same lipase batch to catalyze consecutive reactions decreased in relation to an increase in the polar lipid content.
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9
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Cui C, Zhen Y, Qu J, Chen B, Tan T. Synthesis of biosafe isosorbide dicaprylate ester plasticizer by lipase in a solvent-free system and its sub-chronic toxicity in mice. RSC Adv 2016. [DOI: 10.1039/c5ra27537g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The biosafety isosorbide dicaprylate ester plasticizer was synthesized with bubbling dried air in solvent-free system.
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Affiliation(s)
- Caixia Cui
- National Energy R&D Center for Biorefinery
- Beijing Key Laboratory of Bioprocess
- College of Biology Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
| | - Yueju Zhen
- Shandong Jiqing Chemical Co., Ltd
- Shandong
- PR China
| | - Junge Qu
- Department of Biology and Pharmacy
- Zhejiang Pharmaceutical College
- 315100 Ningbo
- People's Republic of China
| | - Biqiang Chen
- National Energy R&D Center for Biorefinery
- Beijing Key Laboratory of Bioprocess
- College of Biology Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
| | - Tianwei Tan
- National Energy R&D Center for Biorefinery
- Beijing Key Laboratory of Bioprocess
- College of Biology Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
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10
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Liew WH, Hassim MH, Ng DKS, Chemmangattuvalappil N. Systematic Framework for Sustainability Assessment of Biodiesel Production: Preliminary Engineering Stage. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b02894] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Weng Hui Liew
- Department
of Chemical Engineering/Centre of Hydrogen Energy, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Mimi H. Hassim
- Department
of Chemical Engineering/Centre of Hydrogen Energy, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Denny K. S. Ng
- Department
of Chemical and Environmental Engineering/Centre of Excellence for
Green Technologies, The University of Nottingham, Malaysia Campus, Broga Road, 43500 Semenyih, Selangor, Malaysia
| | - Nishanth Chemmangattuvalappil
- Department
of Chemical and Environmental Engineering/Centre of Excellence for
Green Technologies, The University of Nottingham, Malaysia Campus, Broga Road, 43500 Semenyih, Selangor, Malaysia
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11
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Navarro López E, Robles Medina A, González Moreno PA, Jiménez Callejón MJ, Esteban Cerdán L, Martín Valverde L, Castillo López B, Molina Grima E. Enzymatic production of biodiesel from Nannochloropsis gaditana lipids: Influence of operational variables and polar lipid content. BIORESOURCE TECHNOLOGY 2015; 187:346-353. [PMID: 25863898 DOI: 10.1016/j.biortech.2015.03.126] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 03/25/2015] [Accepted: 03/26/2015] [Indexed: 06/04/2023]
Abstract
Fatty acid methyl esters (FAMEs, biodiesel) were produced from Nannochloropsis gaditana wet biomass (12% saponifiable lipids, SLs) by extraction of SLs and lipase catalyzed transesterification. Lipids were extracted by ethanol (96%)-hexane, and 31% pure SLs were obtained with 85% yield. When the lipids were degummed, SL purity increased to 95%. Novozym 435 was selected from four lipases tested. Both the lipidic composition and the use of t-butanol instead of hexane increased the reaction velocity and the conversion, since both decreased due to the adsorption of polar lipids on the lipase immobilization support. The best FAME yield (94.7%) was attained at a reaction time of 48h and using 10mL of t-butanol/g SL, 0.225gN435/g SL, 11:1 methanol/SL molar ratio and adding the methanol in three steps. In these conditions the FAME conversion decreased by 9.8% after three reaction cycles catalyzed by the same lipase batch.
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12
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Enzymatic activity and conformational and morphological studies of four commercial lipases treated with supercritical carbon dioxide. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2014.11.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Abstract
Lipases are the most widely used class of enzymes in organic synthesis. Enzymatic processes have been implemented in a broad range of industries as they are specific, save raw materials, energy and chemicals, environmentally friendly and fast in action compared to conventional processes. The most notable benefit is the moderate process temperature and pressure with no unwanted side reactions. In the past two decades, intensive research was carried out towards enzymatic synthesis of oleochemicals. This review has a sharp focus on the current implemented enzymatic processes for producing different oleochemicals such as fatty acids, glycerin, biodiesel, biolubricant and different alkyl esters via different processes including hydrolysis, esterification, transesterification and intraesterification.
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Affiliation(s)
- Wael Abdelmoez
- Chemical Engineering Department, Faculty of Engineering, Minia University
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14
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Yang H, Mu Y, Chen H, Su C, Yang T, Xiu Z. Sn-1,3-specific Interesterification of Soybean Oil with Medium-chain Triacylglycerol Catalyzed by Lipozyme TL IM. Chin J Chem Eng 2014. [DOI: 10.1016/j.cjche.2014.06.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Lotti M, Pleiss J, Valero F, Ferrer P. Effects of methanol on lipases: molecular, kinetic and process issues in the production of biodiesel. Biotechnol J 2014; 10:22-30. [PMID: 25046365 DOI: 10.1002/biot.201400158] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Revised: 04/05/2014] [Accepted: 06/11/2014] [Indexed: 01/05/2023]
Abstract
The biotechnological production of biodiesel is based on transesterification/esterification reactions between a source of fatty acids and a short-chain alcohol, usually methanol, catalysed by enzymes belonging to the class known as lipases. Several lipases used in industrial processes, although stable in the presence of other organic solvents, are inactivated by methanol at or below the concentration optimal for biodiesel production, making it necessary to use stepwise methanol feeding or pre-treatment of the enzyme. In this review article we focus on what is currently know about methanol inactivation of lipases, a phenomenon which is not common to all lipase enzymes, with the goal of improving the biocatalytic process. We suggest that different mechanisms can lead to inactivation of different lipases, in particular substrate inhibition and protein unfolding. Attempts to improve the performances of methanol sensitive lipases by mutagenesis as well as process engineering approaches are also summarized.
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Affiliation(s)
- Marina Lotti
- Department of Biotechnology and Biosciences, State University of Milano Bicocca, Milano, Italy.
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16
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Hu YD, Qin YZ, Li N, Zong MH. Highly efficient enzymatic synthesis of an ascorbyl unstaturated fatty acid ester with ecofriendly biomass-derived 2-methyltetrahydrofuran as cosolvent. Biotechnol Prog 2014; 30:1005-11. [DOI: 10.1002/btpr.1936] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 04/10/2014] [Indexed: 01/26/2023]
Affiliation(s)
- Ying-Dan Hu
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences; South China University of Technology; Guangzhou 510640 China
- College of Biosciences and Bioengineering; South China University of Technology; Guangzhou 510006 China
| | - Ye-Zhi Qin
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences; South China University of Technology; Guangzhou 510640 China
| | - Ning Li
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences; South China University of Technology; Guangzhou 510640 China
| | - Min-Hua Zong
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences; South China University of Technology; Guangzhou 510640 China
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17
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Chattopadhyay S, Sen R. Development of a novel integrated continuous reactor system for biocatalytic production of biodiesel. BIORESOURCE TECHNOLOGY 2013; 147:395-400. [PMID: 24001564 DOI: 10.1016/j.biortech.2013.08.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 07/31/2013] [Accepted: 08/05/2013] [Indexed: 05/25/2023]
Abstract
A novel integrated immobilized enzyme-reactor system involving a continuous stirred tank reactor with two packed bed reactors in series was developed for the continuous production of biodiesel. The problem of methanol solubility into oil was solved by introducing a stirred tank reactor to dissolve methanol into partially converted oil. This step made the process perfectly continuous without requiring any organic solvent and intermittent methanol addition in the process. The substrate feeding rate of 0.74 mL/min and enzyme loading of 0.75 g per reactor were determined to be optimum for maximum biodiesel yield. The integrated continuous process was stable up to 45 cycles with biodiesel productivity of 137.2 g/L/h, which was approximately 5 times higher than solvent free batch process. In comparison with the processes reported in literature using expensive Novozyme 435 and hazardous organic solvent, the present process is completely green and perfectly continuous with economic and environmental advantages.
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Affiliation(s)
- Soham Chattopadhyay
- Department of Biotechnology, Heritage Institute of Technology, Kolkata, West Bengal 700107, India.
| | - Ramkrishna Sen
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal 721302, India.
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18
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Li Y, Du W, Liu D. Effect of phospholipids on free lipase-mediated methanolysis for biodiesel production. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2013.03.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Effect of Phospholipids on the Catalytic Performance of Lipase. CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.3724/sp.j.1088.2012.11043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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21
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Bavaro T, Torres-Salas P, Ubiali D, Terreni M. Regioselective enzymatic hydrolysis of hexa-O-acetyl-lactal in a green non-aqueous medium. RSC Adv 2013. [DOI: 10.1039/c3ra40266e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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22
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Biodiesel production by transesterification using immobilized lipase. Biotechnol Lett 2012; 35:479-90. [DOI: 10.1007/s10529-012-1116-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Accepted: 11/28/2012] [Indexed: 10/27/2022]
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23
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Characterization of an extracellular lipase and its chaperone from Ralstonia eutropha H16. Appl Microbiol Biotechnol 2012; 97:2443-54. [DOI: 10.1007/s00253-012-4115-z] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 04/16/2012] [Accepted: 04/16/2012] [Indexed: 11/25/2022]
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24
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Umdu ES, Seker E. Transesterification of sunflower oil on single step sol-gel made Al2O3 supported CaO catalysts: effect of basic strength and basicity on turnover frequency. BIORESOURCE TECHNOLOGY 2012; 106:178-181. [PMID: 22197075 DOI: 10.1016/j.biortech.2011.11.135] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Revised: 11/29/2011] [Accepted: 11/30/2011] [Indexed: 05/31/2023]
Abstract
The activities of single step sol-gel made calcium oxide on alumina catalysts were studied as a function of CaO loading, methanol/oil molar ratio and the amount of the catalyst in the transesterification of sunflower oil at 50°C. Also, the turnover frequency (TOF) of the catalysts was calculated to better understand the relationship between the basicity/basic strength and the catalytic activity. From volcano curve (TOF vs. basic strength), it was found that under 50°C and methanol/oil molar ratio of 9, 60% CaO/Al(2)O(3) had the highest turnover frequency, 0.028s(-1), whereas 85% CaO/Al(2)O(3) showed the highest biodiesel yield, ∼96.6%, but TOF obtained on it was 0.012s(-1). It seemed that 60% CaO catalyst had the proper basic strength to obtain the highest TOF.
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Affiliation(s)
- Emin Selahattin Umdu
- Izmir Institute of Technology, Department of Chemical Engineering, Gulbahce Campus, Urla, Izmir 35430, Turkey.
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25
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Foo KY, Hameed BH. Preparation and characterization of activated carbon from sunflower seed oil residue via microwave assisted K2CO3 activation. BIORESOURCE TECHNOLOGY 2011; 102:9794-9. [PMID: 21875789 DOI: 10.1016/j.biortech.2011.08.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 07/24/2011] [Accepted: 08/02/2011] [Indexed: 05/15/2023]
Abstract
Sunflower seed oil residue, a by-product of sunflower seed oil refining, was utilized as a feedstock for preparation of activated carbon (SSHAC) via microwave induced K(2)CO(3) chemical activation. SSHAC was characterized by Fourier transform infrared spectroscopy, nitrogen adsorption-desorption and elemental analysis. Surface acidity/basicity was examined with acid-base titration, while the adsorptive properties of SSHAC were quantified using methylene blue (MB) and acid blue 15 (AB). The monolayer adsorption capacities of MB and AB were 473.44 and 430.37 mg/g, while the Brunauer-Emmett-Teller surface area, Langmuir surface area and total pore volume were 1411.55 m(2)/g, 2137.72 m(2)/g and 0.836 cm(3)/g, respectively. The findings revealed the potential to prepare high surface area activated carbon from sunflower seed oil residue by microwave irradiation.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Véras IC, Silva FAL, Ferrão-Gonzales AD, Moreau VH. One-step enzymatic production of fatty acid ethyl ester from high-acidity waste feedstocks in solvent-free media. BIORESOURCE TECHNOLOGY 2011; 102:9653-9658. [PMID: 21880484 DOI: 10.1016/j.biortech.2011.08.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 08/01/2011] [Accepted: 08/02/2011] [Indexed: 05/31/2023]
Abstract
This work aims to demonstrate the enzymatic production of fatty acid ethyl ester biodiesel from highly acidic feedstock in a single-step reaction, without co-solvents and avoiding the inhibition of the enzyme by ethanol and glycerol. Additionally, an empirical equation is proposed to predict the kinetics of the production reaction as a function of the used feedstock and catalyst concentration. Biodiesel production from highly acidic feedstock perform via simultaneous esterification of free fatty acids and transesterification of triacylglycerols. Enzymatic catalysis is one of the most promising alternative technologies for the biodiesel production. Increasing of the enzymatic bioactivity is crucial for the success of such process in industrial scale. Currently, stepwise addition of the alcohol or the use of co-solvents have been proposed to avoid enzyme inhibition, such strategies add downstream processes to the production. These results can be applied to the development economical-viable enzymatic production of biodiesel in industrial scale.
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Affiliation(s)
- Ilvania C Véras
- Departamento de Biointeração - ICS - Universidade Federal da Bahia (UFBA), Salvador, BA, Brazil
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Gumel AM, Annuar MSM, Heidelberg T, Chisti Y. Thermo-kinetics of lipase-catalyzed synthesis of 6-O-glucosyldecanoate. BIORESOURCE TECHNOLOGY 2011; 102:8727-8732. [PMID: 21816608 DOI: 10.1016/j.biortech.2011.07.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 07/11/2011] [Accepted: 07/11/2011] [Indexed: 05/31/2023]
Abstract
Lipase-catalyzed synthesis of 6-O-glucosyldecanoate from d-glucose and decanoic acid was performed in dimethyl sulfoxide (DMSO), a mixture of DMSO and tert-butanol and tert-butanol alone with a decreasing order of polarity. The highest conversion yield (> 65%) of decanoic acid was obtained in the blended solvent of intermediate polarity mainly because it could dissolve relatively large amounts of both the reactants. The reaction obeyed Michaelis-Menten type of kinetics. The affinity of the enzyme towards the limiting substrate (decanoic acid) was not affected by the polarity of the solvent, but increased significantly with temperature. The esterification reaction was endothermic with activation energy in the range of 60-67 kJ mol⁻¹. Based on the Gibbs energy values, in the solvent blend of DMSO and tert-butanol the position of the equilibrium was shifted more towards the products compared to the position in pure solvents. Monoester of glucose was the main product of the reaction.
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Affiliation(s)
- A M Gumel
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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