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Diao X, Sun W, Jia R, Wang Y, Liu D, Guan H. Preparation and characterization of diacylglycerol via ultrasound-assisted enzyme-catalyzed transesterification of lard with glycerol monolaurate. ULTRASONICS SONOCHEMISTRY 2023; 95:106354. [PMID: 36898248 PMCID: PMC10020118 DOI: 10.1016/j.ultsonch.2023.106354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/14/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
The study aimed to evaluate the effect of ultrasonic pretreatment on the transesterification of lard with glycerol monolaurate (GML) using Lipozyme TL IM to synthesize diacylglycerol (DAG), and the physicochemical properties of lard, GML, ultrasonic-treated diacylglycerol (named U-DAG), purified ultrasonic-treated diacylglycerol obtained by molecular distillation (named P-U-DAG), and without ultrasonic-treated diacylglycerol (named N-U-DAG) were analyzed. The optimized ultrasonic pretreatment conditions were: lard to GML mole ratio 3:1, enzyme dosage 6 %, ultrasonic temperature 80 °C, time 9 min, power 315 W. After ultrasonic pretreatment, the mixtures reacted for 4 h in a water bath at 60 °C, the content of DAG reached 40.59 %. No significant variations were observed between U-DAG and N-U-DAG in fatty acids compositions and iodine value, while P-U-DAG had lower unsaturated fatty acids than U-DAG. Differential scanning calorimetry analysis showed that the melting and crystallization properties of DAGs prepared by ultrasonic pretreatment significantly differed from lard. FTIR spectra noted transesterification reaction from lard and GML with and without ultrasonic pretreatment would not change the structure of lard. However, thermogravimetric analysis proved that N-U-DAG, U-DAG, and P-U-DAG had lower oxidation stability than lard. The higher the content of DAG, the faster the oxidation speed.
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Affiliation(s)
- Xiaoqin Diao
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Weiting Sun
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Ruixin Jia
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Ying Wang
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Dengyong Liu
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China.
| | - Haining Guan
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China.
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Wang S, Lee WJ, Wang Y, Tan CP, Lai OM, Wang Y. Effect of Purification Methods on the Physicochemical and Thermodynamic Properties and Crystallization Kinetics of Medium-Chain, Medium-Long-Chain, and Long-Chain Diacylglycerols. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:8391-8403. [PMID: 32511921 DOI: 10.1021/acs.jafc.0c01346] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Medium-chain diacylglycerol (MCD), medium-long-chain diacylglycerol (MLCD), and long-chain diacylglycerol (LCD) were prepared through enzymatic esterification using different conditions at temperatures of 55-70 °C and reaction times of 1.5-5 h and in the presence of 5-6% Novozym 435. Subsequently, purification was performed using three different techniques, namely, molecular distillation (MD), deodorization (DO), and silica gel column chromatography (SGCC). Variations in terms of the physicochemical and thermodynamic properties, crystallization properties, and kinetics of the diacylglycerols (DAGs) before and after purification were determined. Irrespective of the DAG chain lengths, SGCC was able to produce samples with high DAG purity (96-99 wt %), followed by MD (58-79 wt %) and DO (39-59 wt %). A higher 1,3-DAG/1,2-DAG ratio was recorded for all samples, with the highest ratio recorded for SGCC purified samples. Regardless of the purification techniques used, the solid fat content (SFC) profiles of crude samples with steep curves were altered post-purification, showing a gradual increment in SFC along with increasing temperature. Modification of the Avrami constant and coefficient suggested the modification of the crystal growth mechanism post-purification. Crystallization and melting temperatures of products with a higher DAG purity were shifted to a higher temperature region. Variations were also reflected in terms of the crystal polymorphism, whereby the α and β' crystals transitioned into the more stable β form in purified samples accompanied by modification in the microstructures and crystal sizes. However, there was insignificant change in the morphology of MLCD crystal after purification, except for the decrease in crystal sizes. In conclusion, synthesis of MCD, MLCD, and LCD comprising different DAG purities had distinctive SFC profiles, thermodynamic properties, crystallization kinetics, and crystal morphologies, which can be further incorporated into the preparation of a variety of fat products to obtain end products with desired characteristics.
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Affiliation(s)
- Shaolin Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou, Guangdong 510632, People's Republic of China
| | - Wan Jun Lee
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou, Guangdong 510632, People's Republic of China
| | - Ying Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou, Guangdong 510632, People's Republic of China
- National R&D Center for Freshwater Fish Processing, Jiangxi Normal University, Nanchang, Jiangxi 330022, People's Republic of China
| | - Chin Ping Tan
- Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43300 Serdang, Selangor, Malaysia
| | - Oi Ming Lai
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43300 Serdang, Selangor, Malaysia
- Institute of Bioscience, Universiti Putra Malaysia, 43300 Serdang, Selangor, Malaysia
| | - Yong Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, People's Republic of China
- Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou, Guangdong 510632, People's Republic of China
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Li G, Chen J, Yang J, Wang S, Liu N, Qiu C, Wang Y. Interfacial Crystallization of Diacylglycerols Rich in Medium‐ and Long‐Chain Fatty Acids in Water‐in‐Oil Emulsions. EUR J LIPID SCI TECH 2020. [DOI: 10.1002/ejlt.202000013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Guanghui Li
- JNU‐UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS) Department of Food Science and Engineering Jinan University Guangzhou 510632 China
- Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery Guangzhou 510632 China
| | - Jiazi Chen
- JNU‐UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS) Department of Food Science and Engineering Jinan University Guangzhou 510632 China
- Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery Guangzhou 510632 China
- National R&D Center for Freshwater Fish Processing Jiangxi Normal University Nanchang Jiangxi 330022 China
| | - Jia Yang
- JNU‐UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS) Department of Food Science and Engineering Jinan University Guangzhou 510632 China
- Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery Guangzhou 510632 China
| | - Shaolin Wang
- JNU‐UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS) Department of Food Science and Engineering Jinan University Guangzhou 510632 China
- Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery Guangzhou 510632 China
| | - Ning Liu
- School of Food and Biological Engineering Shaanxi University of Science and Technology Xi'an 710021 China
| | - Chaoying Qiu
- JNU‐UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS) Department of Food Science and Engineering Jinan University Guangzhou 510632 China
- Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery Guangzhou 510632 China
| | - Yong Wang
- JNU‐UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS) Department of Food Science and Engineering Jinan University Guangzhou 510632 China
- Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery Guangzhou 510632 China
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Zhang S, Xiong J, Lou W, Ning Z, Zhang D, Yang J. Antifungal Effect of Triglycerol Monolaurate Synthesized by Lipozyme 435-Mediated Esterification. J Microbiol Biotechnol 2020; 30:561-570. [PMID: 31986567 PMCID: PMC9728257 DOI: 10.4014/jmb.1910.10043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This study was designed to synthesize triglycerol monolaurate (TGML) with Lipozyme 435 as the catalyst, and explore its effects on the growth of Aspergillus parasiticus (A. parasiticus) and Aspergillus flavus (A. flavus) and the secretion of aflatoxin b1. The highest content of TGML (49.76%) was obtained at a molar ratio of triglycerol to lauric acid of 1.08, a reaction temperature of 84.93°C, a reaction time of 6 h and an enzyme dosage of 1.32%. After purification by molecular distillation combined with the washes with ethyl acetate and water, the purity of TGML reached 98.3%. Through characterization by electrospray-ionization mass spectrometry, infrared spectrum and nuclear magnetic resonance, the structure of TGML was identified as a linear triglycerol combined with lauroyl at the end. Finally, the inhibitory effects of TGML on the growths of A. parasiticus and A. flavus and the secretion of aflatoxin b1 were evaluated by measuring the colony diameter, the inhibition rate of mycelial growth and the content of mycotoxin in the media. The results indicated that TGML had a stronger inhibitory effects on colony growth and mycelial development of both toxic molds compared to sodium benzoate and potassium sorbate, and the secretions of toxins from A. parasiticus and A. flavus were completely suppressed when adding TGML at 10 and 5 mM, respectively. Based on the above results, TGML may be used as a substitute for traditional antifungal agents in the food industry.
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Affiliation(s)
- Song Zhang
- School of Food Science and Engineering, South China University of Technology, 381Wushan Road, Guangzhou 510641, P.R. China
| | - Jian Xiong
- School of Food Science and Engineering, South China University of Technology, 381Wushan Road, Guangzhou 510641, P.R. China
| | - Wenyong Lou
- School of Food Science and Engineering, South China University of Technology, 381Wushan Road, Guangzhou 510641, P.R. China
| | - Zhengxiang Ning
- School of Food Science and Engineering, South China University of Technology, 381Wushan Road, Guangzhou 510641, P.R. China
| | - Denghui Zhang
- Innovation Center of Bioactive Molecule Development and Application, South China Institute of Collaborative Innovation, Xuefu Road, Dongguan 221116, P.R. China
| | - Jiguo Yang
- School of Food Science and Engineering, South China University of Technology, 381Wushan Road, Guangzhou 510641, P.R. China,Corresponding author Phone: +86-13560396620 Fax: +86-0769-38822110 E-mail:
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Zhao X, Sun Q, Qin Z, Liu Q, Kong B. Ultrasonic pretreatment promotes diacylglycerol production from lard by lipase-catalysed glycerolysis and its physicochemical properties. ULTRASONICS SONOCHEMISTRY 2018; 48:11-18. [PMID: 30080532 DOI: 10.1016/j.ultsonch.2018.05.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/05/2018] [Accepted: 05/08/2018] [Indexed: 06/08/2023]
Abstract
The objective of this study was to evaluate the effect of ultrasonic pretreatment on diacylglycerol (DAG) synthesis by lipase-catalysed glycerolysis of lard and to analyse the physicochemical properties of lard-based DAG. The optimal ultrasonic pretreatment conditions were: Rhizomucor miehei (Lipozyme® RMIM)-to-lard ratio 4:100 (W/W), 45 °C for 5 min, and power 250 W. The lard-based DAG samples for 4 h of glycerolysis reactions with ultrasonic pretreatment (named DAG-U) and 11 h of glycerolysis reactions without ultrasonic pretreatment (named DAG-N) had similar DAG contents and were used for further analysis. The major FA compositions and iodine value of lard, DAG-U and DAG-N were similar. Fourier transform infrared spectroscopy analysis proved that enzymatic glycerolysis with and without ultrasonic pretreatment did not change the structure of the lard. Differential scanning calorimetry analysis showed that the crystallization onset of DAG-U and DAG-N shifted to higher temperatures than that of lard, which indicated that DAG oils accelerated nucleation and crystal growth. X-ray diffraction analysis revealed that both DAG-U and DAG-N contained β' crystal and a substantially lower amount of β crystal. Overall, ultrasonic pretreatment promotes diacylglycerol production from lard through lipase-catalysed glycerolysis, and DAG-U and DAG-N have similar physicochemical properties.
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Affiliation(s)
- Xinxin Zhao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qinxiu Sun
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Zeyu Qin
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qian Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Baohua Kong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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