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Schmidt F, Graf B, Hinrichs J, Kern C. Continuous microwave-assisted extrusion for high moisture texturized foods: A feasibility study. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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2
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Tan Z, Li X, Shi H, Yin X, Zhu X, Bilal M, Onchari MM. Enhancing the methanol tolerance of Candida antarctica lipase B by saturation mutagenesis for biodiesel preparation. 3 Biotech 2022; 12:22. [PMID: 35036270 PMCID: PMC8695645 DOI: 10.1007/s13205-021-03095-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/13/2021] [Indexed: 01/03/2023] Open
Abstract
Methanol tolerance of lipase is one of the important factors affecting its esterification ability in biodiesel preparation. By B factor indicated prediction of Candida antarctica lipase B (CalB) surface amino acids, eight sites (Val139, Ala146, Leu147, Pro218, Val286, Ala287, Val306, and Gly307) with high B value indicating more flexibility were chosen to perform saturation mutagenesis. High-methanol-tolerant variants, CalB-P218W and -V306N, created larger haloes on emulsified tributyrin solid plate including 15% (v/v) methanol and showed 19% and 31% higher activity over wild-type CalB (CalB-WT), respectively. By modeling, a newly formed hydrogen bond in CalB-V306N and hydrophobic force in CalB-P218W contributing more stability in protein may have resulted in increased methanol tolerance. CalB-P218W and -V306N transesterified the soybean oil into biodiesel at 30 °C by 85% and 89% yield, respectively, over 82% by CalB-WT for 24 h reactions. These results may provide a basis for molecular engineering of CalB and expand its applications in fuel industries. The as-developed semi-rational method could be utilized to enhance the stabilities of many other industrial enzymes.
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Affiliation(s)
- Zhongbiao Tan
- Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, School of Life Science and Food Engineering, Huaiyin Institute of Technology, 1E Meicheng Road, Huai’an, 223003 People’s Republic of China
| | - Xiangqian Li
- Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, School of Life Science and Food Engineering, Huaiyin Institute of Technology, 1E Meicheng Road, Huai’an, 223003 People’s Republic of China
| | - Hao Shi
- Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, School of Life Science and Food Engineering, Huaiyin Institute of Technology, 1E Meicheng Road, Huai’an, 223003 People’s Republic of China
| | - Xiulian Yin
- Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, School of Life Science and Food Engineering, Huaiyin Institute of Technology, 1E Meicheng Road, Huai’an, 223003 People’s Republic of China
| | - Xiaoyan Zhu
- Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, School of Life Science and Food Engineering, Huaiyin Institute of Technology, 1E Meicheng Road, Huai’an, 223003 People’s Republic of China
| | - Muhammad Bilal
- Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, School of Life Science and Food Engineering, Huaiyin Institute of Technology, 1E Meicheng Road, Huai’an, 223003 People’s Republic of China
| | - Mary Mongina Onchari
- Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration, School of Life Science and Food Engineering, Huaiyin Institute of Technology, 1E Meicheng Road, Huai’an, 223003 People’s Republic of China
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3
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Malhotra A, Chen W, Goyal H, Plaza-Gonzalez PJ, Julian I, Catala-Civera JM, Vlachos DG. Temperature Homogeneity under Selective and Localized Microwave Heating in Structured Flow Reactors. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05580] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Abhinav Malhotra
- Delaware Energy Institute, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
| | - Weiqi Chen
- Delaware Energy Institute, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
| | - Himanshu Goyal
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | | | - Ignacio Julian
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | | | - Dionisios G. Vlachos
- Delaware Energy Institute, University of Delaware, 221 Academy Street, Newark, Delaware 19716, United States
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
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4
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Laboratory-Scale Research of Non-Catalyzed Supercritical Alcohol Process for Continuous Biodiesel Production. Catalysts 2021. [DOI: 10.3390/catal11040435] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This work investigates the non-catalyzed supercritical methanol (SCM) process for continuous biodiesel production. The lab-scale setup was designed and used for biodiesel production in the temperature range of 520–650 K and 83–380 bar with an oil-to-methanol molar ratio ranging from 1:5 to 1:45. The experiments were performed in the coiled plug flow tubular reactor. The volumetric flow rate of the methanol/oil ranged from 0.1–10 mL/min. This work examines a new reactor technology involving preheating and pre-mixing of the methanol/oil mixture to reduce setup cost and increase biodiesel yield under the same reaction conditions. Work performed showed that FAME’s yield increased rapidly with temperature and pressure above the methanol critical points (i.e., 513 K and 79.5 bar). The best methyl-ester yield using this reaction technology was 91% at 590 K temperature and 351 bars with an oil-to-methanol ratio of 39 and a 15-min residence time. Furthermore, the kinetics of the free catalyst transesterification process was studied in supercritical methanol under different reaction conditions.
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5
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Zhang J, Hu Y, Zhang F, Lu J, Huang J, Liu C, Jia P, Hu L, An R, Zhou Y. Recent Progress in Microwave-assisted Modification of Vegetable Oils or Their Derivatives. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200510231702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Vegetable oils have been widely used in food, surfactants, lubricants, biodiesel,
coatings, and other fields due to their advantages such as renewable, abundant, suitable for
further processing, and biodegradable. On the other hand, microwave technology has attracted
extensive attention in organic and polymeric chemistry because the technology can
greatly shorten the reaction time, improve the yield of products, reduce side reactions, etc.
This paper summarized recent advances on the microwave-assisted modification of vegetable
oils or their derivatives, such as esterification of free fatty acids, transesterification
of triglycerides, epoxidation, and polymerization.
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Affiliation(s)
- Jinshuai Zhang
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Yun Hu
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Fei Zhang
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Jianyu Lu
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Jia Huang
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Chengguo Liu
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Puyou Jia
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Lihong Hu
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
| | - Rongrong An
- College of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Yonghong Zhou
- Key Lab of Biomass Energy and Material, Jiangsu Province; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province; Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Lab for Biomass Chemical Utilization; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun, Nanjing, 210042, China
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Parizotto CA, Dall'Oglio EL, de Vasconcelos LG, de Sousa PT, Taques Filho EGR, Kuhnen CA. Measuring dielectric properties for microwave-assisted extraction of essential oils using single-mode and multimode reactors. RSC Adv 2019; 9:5259-5269. [PMID: 35515916 PMCID: PMC9060669 DOI: 10.1039/c8ra08727j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 12/28/2018] [Indexed: 11/21/2022] Open
Abstract
The dielectric properties of Cymbopogon nardus, Eucalyptus sp., Piper aduncum and Piper hispidinervum were investigated as a function of frequency and temperature, using dry plant matter and its mixtures with water at different concentrations. This was followed by the extraction of essential oils performed with microwave heating in single-mode and multimode cavities with a variable power 6.0 kW generator operating at 2.45 GHz. The dielectric properties of the dry plant matter changed markedly with increasing water content, exhibiting high loss factors and small penetration depths. Due to the high level of absorption, even with low water contents, microwave-assisted extraction (MAE) showed better green performance employing lower plant matter/water ratios (1 : 2 or 1 : 4) and applying shorter extraction times compared with conventional hydrodistillation (HD). Using the single-mode MAE reactor, in the case of Cymbopogon nardus, for a plant matter/water ratio of 1 : 4 the energy efficiency was 1.78 g kW−1 h−1, applying 0.3 kW for 16.7 min. By way of comparison, for the same extraction time using HD, the corresponding efficiency was only 0.50 g kW−1 h−1. In experiments with citronella using multimode MAE, the best energy efficiency of 2.53 g kW−1 h−1 was obtained with a plant matter/water ratio of 1 : 2 applying 1.8 kW of power for 30 min. Single and multimode MAE experiments showed optimum conditions with lower water content. Thus, greater amounts of material can be processed in a shorter time, in accordance with the ideals of a green chemistry. The resulting extractions showed an energy efficiency up to 27 times greater compared with conventional HD, applying the same extraction time. Dielectric properties of plants/water mixtures enables the design of single mode cavities for microwave assisted extraction of essentials oils.![]()
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Affiliation(s)
- Carlos A Parizotto
- Departamento de Química, Universidade Federal do Mato Grosso Av. Fernando Corrêa da Costa s/n, Coxipó Cuiabá MT CEP 78090-600 Brazil +55 65 36158799 +55 65 36158798
| | - Evandro L Dall'Oglio
- Departamento de Química, Universidade Federal do Mato Grosso Av. Fernando Corrêa da Costa s/n, Coxipó Cuiabá MT CEP 78090-600 Brazil +55 65 36158799 +55 65 36158798
| | - Leonardo G de Vasconcelos
- Departamento de Química, Universidade Federal do Mato Grosso Av. Fernando Corrêa da Costa s/n, Coxipó Cuiabá MT CEP 78090-600 Brazil +55 65 36158799 +55 65 36158798
| | - Paulo T de Sousa
- Departamento de Química, Universidade Federal do Mato Grosso Av. Fernando Corrêa da Costa s/n, Coxipó Cuiabá MT CEP 78090-600 Brazil +55 65 36158799 +55 65 36158798
| | - Eduardo G R Taques Filho
- Departamento de Química, Universidade Federal do Mato Grosso Av. Fernando Corrêa da Costa s/n, Coxipó Cuiabá MT CEP 78090-600 Brazil +55 65 36158799 +55 65 36158798
| | - Carlos Alberto Kuhnen
- Departamento de Física, Universidade Federal do Santa Catarina, Campus Universitário Trindade Florianópolis SC CEP 88040-970 Brazil
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7
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Li C, Zhang J, Li Z, Yu X. Quality assessment of packaged fried foods during storage based on oven storage test. Int J Food Sci Technol 2019. [DOI: 10.1111/ijfs.13971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chunhua Li
- College of Food Science and Engineering; Northwest A&F University; 22 Xinong Road Yangling 712100 Shaanxi China
| | - Jianxin Zhang
- College of Food Science and Engineering; Northwest A&F University; 22 Xinong Road Yangling 712100 Shaanxi China
| | - Zhonghong Li
- College of Food Science and Engineering; Northwest A&F University; 22 Xinong Road Yangling 712100 Shaanxi China
| | - Xiuzhu Yu
- College of Food Science and Engineering; Northwest A&F University; 22 Xinong Road Yangling 712100 Shaanxi China
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8
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Ibrahim NA, Zaini MAA. Microwave-assisted solvent extraction of castor oil from castor seeds. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2018.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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9
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González-Monroy AD, Kaur Kataria T, Olvera-Cervantes JL, Corona-Chávez A, Ozuna C, Rodríguez-Hernández G, Sosa-Morales ME. Dielectric Properties of Beverages (Tamarind and Green) Relevant to Microwave-Assisted Pasteurization. J Food Sci 2018; 83:2317-2323. [PMID: 30085360 DOI: 10.1111/1750-3841.14289] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/31/2018] [Accepted: 06/26/2018] [Indexed: 11/30/2022]
Abstract
Dielectric properties (DPs) of two beverages, tamarind and a green drink (based on mix fruits of pineapple, guava, lemon, and nopal), were studied. The DPs were determined using the open-ended coaxial probe method in the frequency range from 0.25 to 25 GHz at 10, 30, 50, and 70 °C. The dielectric constant decreased when both frequency and temperature increased above 1000 MHz. For both beverages, the dielectric loss factor increased with increasing frequency and increasing temperature. In addition, dielectric constant values ranged from 59.7 to 82.5, and the dielectric loss factors were between 5.8 and 31.1. The penetration depth (dp ) of electromagnetic waves in the beverages increased proportionally to temperature at frequencies above 1000 MHz; dp values ranged from 0.2 to 7.5 cm. Because of its complexity and the amount of ingredients and the interactions between them, the green drink showed higher values of dielectric constants in comparison with the tamarind beverage. PRACTICAL APPLICATION The dielectric properties of the studied beverages, how they behave at different temperatures, and the penetration depth reached by microwave at the allocated frequencies, provide important parameters for further heating treatments, such as heating (microwave-assisted pasteurization) and for modeling/simulation purposes.
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Affiliation(s)
| | | | | | - Alonso Corona-Chávez
- Depto. de Electrónica, Univ. de Guanajuato, Salamanca, Guanajuato, Mexico.,Insto. Nacl. de Astrofísica, Óptica y Electrónica, Tonanzintla, Puebla, Mexico
| | - César Ozuna
- Depto. de Alimentos, Posgrado en Biociencias, Univ. de Guanajuato, Irapuato, Guanajuato, Mexico
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10
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Sub–supercritical liquefaction of municipal wet sewage sludge to produce bio-oil: Effect of different organic–water mixed solvents. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2018.04.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Ibrahim NA, Zaini MAA. Dielectric properties in microwave-assisted solvent extraction-Present trends and future outlook. ASIA-PAC J CHEM ENG 2018. [DOI: 10.1002/apj.2230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nur Atirah Ibrahim
- Centre of Lipids Engineering & Applied Research (CLEAR); Ibnu-Sina Institute for Scientific & Industrial Research (ISI-SIR), Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
- Department of Chemical Engineering, Faculty of Chemical & Energy Engineering; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
| | - Muhammad Abbas Ahmad Zaini
- Centre of Lipids Engineering & Applied Research (CLEAR); Ibnu-Sina Institute for Scientific & Industrial Research (ISI-SIR), Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
- Department of Chemical Engineering, Faculty of Chemical & Energy Engineering; Universiti Teknologi Malaysia; Johor Bahru Johor Malaysia
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12
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Kuhnen CA, Dall'Oglio EL, de Sousa PT. Quantum Tunneling Contribution for the Activation Energy in Microwave-Induced Reactions. J Phys Chem A 2017; 121:5735-5747. [PMID: 28708411 DOI: 10.1021/acs.jpca.7b04875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this study, a quantum approach is presented to explain microwave-enhanced reaction rates by considering the tunneling effects in chemical reactions. In the Arrhenius equation, the part of the Hamiltonian relative to the interaction energy during tunneling, between the particle that tunnels and the electrical field defined in the medium, whose spatial component is specified by its rms value, is taken into account. An approximate evaluation of the interaction energy leads to a linear dependence of the effective activation energy on the applied field. The evaluation of the rms value of the field for pure liquids and reaction mixtures, through their known dielectric properties, leads to an appreciable reduction in the activation energies for the proton transfer process in these liquids. The results indicate the need to move toward the use of more refined methods of modern quantum chemistry to calculate more accurately field-induced reaction rates and effective activation energies.
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Affiliation(s)
- Carlos A Kuhnen
- Departamento de Física, Universidade Federal do Santa Catarina ; Campus Universitário Trindade, Florianópolis, SC, CEP 88040-970, Brazil.,Departamento de Química, Universidade Federal do Mato Grosso , Av. Fernando Corrêa da Costa s/n, Coxipó, Cuiabá, MT CEP 78090-600, Brazil
| | - Evandro L Dall'Oglio
- Departamento de Química, Universidade Federal do Mato Grosso , Av. Fernando Corrêa da Costa s/n, Coxipó, Cuiabá, MT CEP 78090-600, Brazil
| | - Paulo T de Sousa
- Departamento de Química, Universidade Federal do Mato Grosso , Av. Fernando Corrêa da Costa s/n, Coxipó, Cuiabá, MT CEP 78090-600, Brazil
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13
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Álvarez A, Fayos-Fernández J, Monzó-Cabrera J, Cocero MJ, Mato RB. Measurement and correlation of the dielectric properties of a grape pomace extraction media. Effect of temperature and composition. J FOOD ENG 2017. [DOI: 10.1016/j.jfoodeng.2016.11.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Dielectric Properties of Zinc Sulfide Concentrate during the Roasting at Microwave Frequencies. MINERALS 2017. [DOI: 10.3390/min7020031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Medium chain glycerides of coconut oil for microwave-enhanced conversion of polycarbonate into polyols. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.11.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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17
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Barekati-Goudarzi M, Boldor D, Nde DB. In-situ transesterification of seeds of invasive Chinese tallow trees (Triadica sebifera L.) in a microwave batch system (GREEN(3)) using hexane as co-solvent: Biodiesel production and process optimization. BIORESOURCE TECHNOLOGY 2016; 201:97-104. [PMID: 26638139 DOI: 10.1016/j.biortech.2015.11.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/11/2015] [Accepted: 11/12/2015] [Indexed: 06/05/2023]
Abstract
In-situ transesterification (simultaneous extraction and transesterification) of Chinese tallow tree seeds into methyl esters using a batch microwave system was investigated in this study. A high degree of oil extraction and efficient conversion of oil to biodiesel were found in the proposed range. The process was further optimized in terms of product yields and conversion rates using Doehlert optimization methodology. Based on the experimental results and statistical analysis, the optimal production yield conditions for this process were determined as: catalyst concentration of 1.74wt.%, solvent ratio about 3 (v/w), reaction time of 20min and temperature of 58.1°C. H(+)NMR was used to calculate reaction conversion. All methyl esters produced using this method met ASTM biodiesel quality specifications.
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Affiliation(s)
- Mohamad Barekati-Goudarzi
- Louisiana State University Agricultural Center, BAE Department, Baton Rouge, LA 70803, United States
| | - Dorin Boldor
- Louisiana State University Agricultural Center, BAE Department, Baton Rouge, LA 70803, United States.
| | - Divine B Nde
- Louisiana State University Agricultural Center, BAE Department, Baton Rouge, LA 70803, United States; University of Bamenda, Department of Food Science and Bio-resource Technology, College of Technology, P.O. Box 39, Bamenda, Cameroon
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18
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Dall’Oglio EL, de Sousa PT, Campos DC, Gomes de Vasconcelos L, da Silva AC, Ribeiro F, Rodrigues V, Kuhnen CA. Measurement of Dielectric Properties and Microwave-Assisted Homogeneous Acid-Catalyzed Transesterification in a Monomode Reactor. J Phys Chem A 2015; 119:8971-80. [DOI: 10.1021/acs.jpca.5b04890] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Evandro L. Dall’Oglio
- Departamento de
Química, Universidade Federal do Mato Grosso
, Av. Fernando
Corrêa da Costa s/n, Coxipó,
Cuiabá-MT
CEP 78090-600, Brazil
| | - Paulo T. de Sousa
- Departamento de
Química, Universidade Federal do Mato Grosso
, Av. Fernando
Corrêa da Costa s/n, Coxipó,
Cuiabá-MT
CEP 78090-600, Brazil
| | - Deibnasser C. Campos
- Departamento de
Química, Universidade Federal do Mato Grosso
, Av. Fernando
Corrêa da Costa s/n, Coxipó,
Cuiabá-MT
CEP 78090-600, Brazil
| | - Leonardo Gomes de Vasconcelos
- Departamento de
Química, Universidade Federal do Mato Grosso
, Av. Fernando
Corrêa da Costa s/n, Coxipó,
Cuiabá-MT
CEP 78090-600, Brazil
| | - Alan Cândido da Silva
- Departamento de
Química, Universidade Federal do Mato Grosso
, Av. Fernando
Corrêa da Costa s/n, Coxipó,
Cuiabá-MT
CEP 78090-600, Brazil
| | - Fabilene Ribeiro
- Departamento de
Química, Universidade Federal do Mato Grosso
, Av. Fernando
Corrêa da Costa s/n, Coxipó,
Cuiabá-MT
CEP 78090-600, Brazil
| | - Vaniomar Rodrigues
- Departamento de
Química, Universidade Federal do Mato Grosso
, Av. Fernando
Corrêa da Costa s/n, Coxipó,
Cuiabá-MT
CEP 78090-600, Brazil
| | - Carlos Alberto Kuhnen
- Departamento de Física, Universidade Federal do Santa Catarina
, Campus Universitário Trindade, Florianópolis-SC
CEP 88040-970, Brazil
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19
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Franco AP, Yamamoto LY, Tadini CC, Gut JA. Dielectric properties of green coconut water relevant to microwave processing: Effect of temperature and field frequency. J FOOD ENG 2015. [DOI: 10.1016/j.jfoodeng.2015.01.011] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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20
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Zhang W, Luan D, Tang J, Sablani SS, Rasco B, Lin H, Liu F. Dielectric properties and other physical properties of low-acyl gellan gel as relevant to microwave assisted pasteurization process. J FOOD ENG 2015. [DOI: 10.1016/j.jfoodeng.2014.10.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Strategies for controlled synthesis of nanoparticles derived from a group of uniform materials based on organic salts. J Colloid Interface Sci 2015; 446:163-9. [PMID: 25666457 DOI: 10.1016/j.jcis.2015.01.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 01/13/2015] [Indexed: 11/20/2022]
Abstract
Over the past several years, nanomaterials derived from a group of uniform materials based on organic salts (GUMBOS) have been introduced into the scientific literature involving many analytical, biological, and technological applications. In this regard, these nanoGUMBOS have been shown to display a number of unique properties including fluorescence, magnetism, tumor targeting, and optoelectronic. To date, however, little focus has been placed on developing and refining approaches for generation of size-controlled nanoGUMBOS from GUMBOS building blocks. Herein, we describe a systematic effort to define various strategies for the production of well-defined nanoGUMBOS. Specifically, we describe methods based on (i) sonochemical, (ii) microwave-assisted, (iii) cyclodextrin-assisted, and (iv) surfactant-assisted syntheses of nanoGUMBOS, evaluating the efficiency of each technique in controlling the size, sphericity, and uniformity of nanoGUMBOS produced. The effect of systematic variation in experimental parameters such as concentration, cation-to-anion ratio, as well as presence and type of template introduced for formation of nanoGUMBOS is also investigated.
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Leveneur S, Ledoux A, Estel L, Taouk B, Salmi T. Epoxidation of vegetable oils under microwave irradiation. Chem Eng Res Des 2014. [DOI: 10.1016/j.cherd.2014.04.010] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40 GHz RF biosensor based on microwave coplanar waveguide transmission line for cancer cells (HepG2) dielectric characterization. Biosens Bioelectron 2014; 61:417-21. [PMID: 24934741 DOI: 10.1016/j.bios.2014.05.060] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 05/12/2014] [Accepted: 05/22/2014] [Indexed: 11/23/2022]
Abstract
This paper presents a 40-GHz RF biosensor that involves using a microwave coplanar waveguide (CPW) transmission line for the dielectric characterization of cancer cells (Hepatoma G2, HepG2). In the past, conventional resonator-based biosensors were designed to operate at a specific resonant peak; however, the dielectric sensitivity of the cells was restricted to a narrow bandwidth. To provide a very wide bandwidth (1-40 GHz), biosensors were based on a microwave CPW transmission line. The proposed biosensor can rapidly measure two frequency-dependent cell-based dielectric parameters of HepG2 cells, microwave attenuation (α(f)cell) and the dielectric constant (εr(f)cell), while removing the microwave parasitic effects (including the cultured medium and substrate materials). The proposed biosensor can be applied in postoperative cancer diagnosis.
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Tsubaki S, Oono K, Ueda T, Onda A, Yanagisawa K, Mitani T, Azuma JI. Microwave-assisted hydrolysis of polysaccharides over polyoxometalate clusters. BIORESOURCE TECHNOLOGY 2013; 144:67-73. [PMID: 23859983 DOI: 10.1016/j.biortech.2013.06.092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 06/22/2013] [Accepted: 06/24/2013] [Indexed: 06/02/2023]
Abstract
Polyoxometalate (POM) clusters were utilized as recyclable acid catalysts and microwave-absorbing agents for the microwave-assisted hydrolysis of corn starch and crystalline cellulose. Phosphotungstic (PW) and silicotungstic (SiW) acids showed high hydrolyzing activity, while phosphomolybdic acid (PMo) showed lower glucose stability. The PW catalyst could be recycled by ether extraction at least 4 times without changing its catalytic activity. The addition of PW could reduce the energy demand required for running the hydrolysis by 17-23%. The dielectric property of the aqueous PW solution was important for increasing the microwave-absorption capability of the reaction system and reducing the energy consumption.
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Affiliation(s)
- Shuntaro Tsubaki
- Oceanography Section, Science Research Center, Kochi University, Kochi, Japan.
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Tsubaki S, Azuma JI. Total fractionation of green tea residue by microwave-assisted alkaline pretreatment and enzymatic hydrolysis. BIORESOURCE TECHNOLOGY 2013; 131:485-91. [PMID: 23384782 DOI: 10.1016/j.biortech.2013.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 12/30/2012] [Accepted: 01/02/2013] [Indexed: 05/09/2023]
Abstract
Total refinery of constituents of green tea residue was achieved by combination of microwave-assisted alkaline pretreatment and enzymatic hydrolysis. Alkaline pretreatment was effective at separating pectic polysaccharides, protein, phenolic compounds and aliphatic compounds (probably originating from cuticular components), and the solubilization rate was attained 64–74% by heating at 120–200 °C. The higher heating value (HHV) of alkali-soluble fraction attained 20.1 MJ/kg, indicating its usability as black-liquor-like biofuel. Successive cellulolytic enzymatic hydrolysis mainly converted cellulose into glucose and attained the maximum solubilization rate of 89%. Final residue was predominantly composed of aliphatic cuticular components with high proportion in 9,10,18-trihydroxyoctadecanoic acid (30.1–48.6%). These cuticular components are potential alternative feedstock for aliphatic compounds commonly found in oil plants.
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Affiliation(s)
- Shuntaro Tsubaki
- Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan.
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