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Ivanovic J, Milovanovic S, Zizovic I. Utilization of supercritical CO2as a processing aid in setting functionality of starch-based materials. STARCH-STARKE 2016. [DOI: 10.1002/star.201500194] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jasna Ivanovic
- Faculty of Technology and Metallurgy; University of Belgrade; Belgrade Serbia
| | - Stoja Milovanovic
- Faculty of Technology and Metallurgy; University of Belgrade; Belgrade Serbia
| | - Irena Zizovic
- Faculty of Technology and Metallurgy; University of Belgrade; Belgrade Serbia
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52
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Efaq AN, Ab. Rahman NNN, Nagao H, Al-Gheethi AA, Ab. Kadir MO. Inactivation of Aspergillus Spores in Clinical Wastes by Supercritical Carbon Dioxide. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2016. [DOI: 10.1007/s13369-016-2087-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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53
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Ceni G, Fernandes Silva M, Valério Jr. C, Cansian RL, Oliveira JV, Dalla Rosa C, Mazutti MA. Continuous inactivation of alkaline phosphatase and Escherichia coli in milk using compressed carbon dioxide as inactivating agent. J CO2 UTIL 2016. [DOI: 10.1016/j.jcou.2015.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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54
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Bandeira PT, Alnoch RC, de Oliveira AR, de Souza EM, de O. Pedrosa F, Krieger N, Piovan L. Enzymatic kinetic resolution of aliphatic sec -alcohols by LipG9, a metagenomic lipase. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2015.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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55
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Liu R, Zhang P, Zhang S, Yan T, Xin J, Zhang X. Ionic liquids and supercritical carbon dioxide: green and alternative reaction media for chemical processes. REV CHEM ENG 2016. [DOI: 10.1515/revce-2015-0078] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIonic liquids (ILs) and supercritical CO
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56
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Silveira MHL, Morais ARC, da Costa Lopes AM, Olekszyszen DN, Bogel-Łukasik R, Andreaus J, Pereira Ramos L. Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries. CHEMSUSCHEM 2015; 8:3366-90. [PMID: 26365899 DOI: 10.1002/cssc.201500282] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 06/03/2015] [Indexed: 05/08/2023]
Abstract
Lignocellulosic materials, such as forest, agriculture, and agroindustrial residues, are among the most important resources for biorefineries to provide fuels, chemicals, and materials in such a way to substitute for, at least in part, the role of petrochemistry in modern society. Most of these sustainable biorefinery products can be produced from plant polysaccharides (glucans, hemicelluloses, starch, and pectic materials) and lignin. In this scenario, cellulosic ethanol has been considered for decades as one of the most promising alternatives to mitigate fossil fuel dependence and carbon dioxide accumulation in the atmosphere. However, a pretreatment method is required to overcome the physical and chemical barriers that exist in the lignin-carbohydrate composite and to render most, if not all, of the plant cell wall components easily available for conversion into valuable products, including the fuel ethanol. Hence, pretreatment is a key step for an economically viable biorefinery. Successful pretreatment method must lead to partial or total separation of the lignocellulosic components, increasing the accessibility of holocellulose to enzymatic hydrolysis with the least inhibitory compounds being released for subsequent steps of enzymatic hydrolysis and fermentation. Each pretreatment technology has a different specificity against both carbohydrates and lignin and may or may not be efficient for different types of biomasses. Furthermore, it is also desirable to develop pretreatment methods with chemicals that are greener and effluent streams that have a lower impact on the environment. This paper provides an overview of the most important pretreatment methods available, including those that are based on the use of green solvents (supercritical fluids and ionic liquids).
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Affiliation(s)
- Marcos Henrique Luciano Silveira
- CEPESQ, Research Center in Applied Chemistry, Department of Chemistry, Federal University of Paraná, Curitiba, PR, 81531-970, Brazil
| | - Ana Rita C Morais
- Unit of Bioenergy, National Laboratory of Energy and Geology, 1649-038, Lisbon, Portugal
- LAQV/REQUIMTE, Department of Chemistry, Faculty of Science and Technology, New University of Lisbon, 2829-516, Caparica, Portugal
| | - Andre M da Costa Lopes
- Unit of Bioenergy, National Laboratory of Energy and Geology, 1649-038, Lisbon, Portugal
- LAQV/REQUIMTE, Department of Chemistry, Faculty of Science and Technology, New University of Lisbon, 2829-516, Caparica, Portugal
| | | | - Rafał Bogel-Łukasik
- Unit of Bioenergy, National Laboratory of Energy and Geology, 1649-038, Lisbon, Portugal.
| | - Jürgen Andreaus
- Department of Chemistry, Regional University of Blumenau, Blumenau, SC, 89012 900, Brazil.
| | - Luiz Pereira Ramos
- CEPESQ, Research Center in Applied Chemistry, Department of Chemistry, Federal University of Paraná, Curitiba, PR, 81531-970, Brazil.
- INCT Energy and Environment (INCT E&A), Department of Chemistry, Federal University of Paraná.
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57
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Vo HT, Imai T, Ho TT, Dang TLT, Hoang SA. Potential application of high pressure carbon dioxide in treated wastewater and water disinfection: Recent overview and further trends. J Environ Sci (China) 2015; 36:38-47. [PMID: 26456604 DOI: 10.1016/j.jes.2015.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 04/12/2015] [Accepted: 04/28/2015] [Indexed: 06/05/2023]
Abstract
Recently emerging disadvantages in conventional disinfection have heightened the need for finding a new solution. Developments in the use of high pressure carbon dioxide for food preservation and sterilization have led to a renewed interest in its applicability in wastewater treatment and water disinfection. Pressurized CO2 is one of the most investigated methods of antibacterial treatment and has been used extensively for decades to inhibit pathogens in dried food and liquid products. This study reviews the literature concerning the utility of CO2 as a disinfecting agent, and the pathogen inactivation mechanism of CO2 treatment is evaluated based on all available research. In this paper, it will be argued that the successful application and high effectiveness of CO2 treatment in liquid foods open a potential opportunity for its use in wastewater treatment and water disinfection. The findings from models with different operating conditions (pressure, temperature, microorganism, water content, media …) suggest that most microorganisms are successfully inhibited under CO2 treatment. It will also be shown that the bacterial deaths under CO2 treatment can be explained by many different mechanisms. Moreover, the findings in this study can help to address the recently emerging problems in water disinfection, such as disinfection by-products (resulting from chlorination or ozone treatment).
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Affiliation(s)
- Huy Thanh Vo
- Division of Urban Infrastructural Engineering, Mien trung University of Civil Engineering, Phu Yen 56000, Viet Nam.
| | - Tsuyoshi Imai
- Division of Environmental Science and Engineering, Yamaguchi University, Yamaguchi 755-8611, Japan
| | - Truc Thanh Ho
- Division of Urban Infrastructural Engineering, Mien trung University of Civil Engineering, Phu Yen 56000, Viet Nam
| | - Thanh-Loc Thi Dang
- Division of Environmental Science and Engineering, Yamaguchi University, Yamaguchi 755-8611, Japan
| | - Son Anh Hoang
- Division of Urban Infrastructural Engineering, Mien trung University of Civil Engineering, Phu Yen 56000, Viet Nam
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58
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59
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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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60
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Boyère C, Jérôme C, Debuigne A. Input of supercritical carbon dioxide to polymer synthesis: An overview. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.07.019] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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61
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Duong T, Balaban M. Optimisation of the process parameters of combined high hydrostatic pressure and dense phase carbon dioxide on enzyme inactivation in feijoa (Acca sellowiana) puree using response surface methodology. INNOV FOOD SCI EMERG 2014. [DOI: 10.1016/j.ifset.2014.09.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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62
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Zaidul I, Noda T, Sharif K, Karim A, Smith R. Reduction of gelatinization temperatures of starch blend suspensions with supercritical CO2 treatment. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2014.10.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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63
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Baker JA, Hirst JD. Accelerating electrostatic pair methods on graphical processing units to study molecules in supercritical carbon dioxide. Faraday Discuss 2014; 169:343-57. [PMID: 25340544 DOI: 10.1039/c4fd00012a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Traditionally, electrostatic interactions are modelled using Ewald techniques, which provide a good approximation, but are poorly suited to GPU architectures. We use the GPU versions of the LAMMPS MD package to implement and assess the Wolf summation method. We compute transport and structural properties of pure carbon dioxide and mixtures of carbon dioxide with either methane or difluoromethane. The diffusion of pure carbon dioxide is indistinguishable when using the Wolf summation method instead of PPPM on GPUs. The optimum value of the potential damping parameter, α, is 0.075. We observe a decrease in accuracy when the system polarity increases, yet the method is robust for mildly polar systems. We anticipate the method can be used for a number of techniques, and applied to a variety of systems. Substitution of PPPM can yield a two-fold decrease in the wall-clock time.
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Affiliation(s)
- John A Baker
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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64
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Taher H, Al-Zuhair S, Al-Marzouqi AH, Haik Y, Farid M. Enzymatic biodiesel production of microalgae lipids under supercritical carbon dioxide: Process optimization and integration. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2014.05.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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65
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Jenab E, Temelli F, Curtis JM, Zhao YY. Performance of two immobilized lipases for interesterification between canola oil and fully-hydrogenated canola oil under supercritical carbon dioxide. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.02.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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66
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Karmee SK, Niemeijer B, Casiraghi L, Mlambo B, Lapkin A, Greiner L. Facile biocatalytic synthesis of a macrocyclic lactone in sub- and supercritical solvents. BIOCATAL BIOTRANSFOR 2014. [DOI: 10.3109/10242422.2014.893579] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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67
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Affiliation(s)
- Jerry W. King
- Departments of Chemistry & Biochemistry and Food Science, University of Arkansas, Fayetteville, Arkansas 72701;
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68
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Tao M, Li Q, Qu J, Zhang M. Enzymatic Synthesis of Dipalmitin in Supercritical Carbon Dioxide and Mechanism Study. Ind Eng Chem Res 2013. [DOI: 10.1021/ie4015364] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Minli Tao
- Tianjin University R&D Center for Petrochemical Technology and ‡Department of Chemistry, School of Sciences, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Qian Li
- Tianjin University R&D Center for Petrochemical Technology and ‡Department of Chemistry, School of Sciences, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Jiazheng Qu
- Tianjin University R&D Center for Petrochemical Technology and ‡Department of Chemistry, School of Sciences, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Minhua Zhang
- Tianjin University R&D Center for Petrochemical Technology and ‡Department of Chemistry, School of Sciences, Tianjin University, Tianjin 300072, People’s Republic of China
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69
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Cui JD, Jia SR. Optimization protocols and improved strategies of cross-linked enzyme aggregates technology: current development and future challenges. Crit Rev Biotechnol 2013; 35:15-28. [DOI: 10.3109/07388551.2013.795516] [Citation(s) in RCA: 170] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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70
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Tran MK, Hassani L, Calvignac B, Beuvier T, Hindré F, Boury F. Lysozyme encapsulation within PLGA and CaCO3 microparticles using supercritical CO2 medium. J Supercrit Fluids 2013. [DOI: 10.1016/j.supflu.2013.02.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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71
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Leitgeb M, Čolnik M, Primožič M, Zalar P, Cimerman NG, Knez Ž. Activity of cellulase and α-amylase from Hortaea werneckii after cell treatment with supercritical carbon dioxide. J Supercrit Fluids 2013. [DOI: 10.1016/j.supflu.2013.03.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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72
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Hu W, Zhou L, Xu Z, Zhang Y, Liao X. Enzyme inactivation in food processing using high pressure carbon dioxide technology. Crit Rev Food Sci Nutr 2013; 53:145-61. [PMID: 23072530 DOI: 10.1080/10408398.2010.526258] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
High pressure carbon dioxide (HPCD) is an effective non-thermal processing technique for inactivating deleterious enzymes in liquid and solid food systems. This processing method avoids high temperatures and exerts a minimal impact on the nutritional and sensory properties of foods, but extends shelf life by inhibiting or killing microorganisms and enzymes. Indigenous enzymes in food such as polyphenol oxidase (PPO), pectin methylesterase (PME), and lypoxygenase (LOX) may cause undesirable chemical changes in food attributes, showing the loss in color, texture, and flavor. For more than two decades, HPCD has proved its effectiveness in inactivating these enzymes. The HPCD-induced inactivation of some microbial enzymes responsible for microbial metabolism is also included. This review presents a survey of the published knowledge regarding the use of HPCD for the inactivation of these enzymes, and analyzes the factors controlling the efficiency of HPCD and speculates on the underlying mechanism that leads to enzyme inactivation.
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Affiliation(s)
- Wanfeng Hu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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73
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Ali-Nehari A, Kim SB, Lee YB, Chun BS. Digestive enzymes characterization of krill (Euphausia superba) residues deoiled by supercritical carbon dioxide and organic solvents. J IND ENG CHEM 2012. [DOI: 10.1016/j.jiec.2012.01.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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74
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Illanes A, Cauerhff A, Wilson L, Castro GR. Recent trends in biocatalysis engineering. BIORESOURCE TECHNOLOGY 2012; 115:48-57. [PMID: 22424920 DOI: 10.1016/j.biortech.2011.12.050] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 12/08/2011] [Accepted: 12/10/2011] [Indexed: 05/31/2023]
Abstract
During the last 30 years the scope of biocatalysis has been expanding due to the advances in several technological fields. Diverse techniques as structural enzyme improvement (e.g. protein engineering, direct evolution), engineering approaches (e.g. ionic liquids, supercritical fluids) and physical stabilization (e.g. immobilization, CLEAS) have been developed, which in combination are powerful tools to improve biotransformation and to synthesize new products. In the present work, recent advances in biocatalysis are reviewed.
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Affiliation(s)
- Andrés Illanes
- Escuela de Ingeniería Bioquímica, Universidad Católica de Valparaíso, Valparaíso, Chile.
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75
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Rawson A, Tiwari BK, Brunton N, Brennan C, Cullen PJ, O'Donnell CP. Application of Supercritical Carbon Dioxide to Fruit and Vegetables: Extraction, Processing, and Preservation. FOOD REVIEWS INTERNATIONAL 2012. [DOI: 10.1080/87559129.2011.635389] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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76
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Čolnik M, Primožič M, Knez Ž, Habulin M. Use of supercritical carbon dioxide for proteins and alcohol dehydrogenase release from yeast Saccharomyces cerevisiae. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2012.02.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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77
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Optimization of microbial inactivation of shrimp by dense phase carbon dioxide. Int J Food Microbiol 2012; 156:44-9. [DOI: 10.1016/j.ijfoodmicro.2012.02.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 02/23/2012] [Accepted: 02/25/2012] [Indexed: 11/22/2022]
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78
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Idris A, Bukhari A. Immobilized Candida antarctica lipase B: Hydration, stripping off and application in ring opening polyester synthesis. Biotechnol Adv 2011; 30:550-63. [PMID: 22041165 DOI: 10.1016/j.biotechadv.2011.10.002] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 09/09/2011] [Accepted: 10/04/2011] [Indexed: 10/16/2022]
Abstract
This work reviews the stripping off, role of water molecules in activity, and flexibility of immobilized Candida antarctica lipase B (CALB). Employment of CALB in ring opening polyester synthesis emphasizing on a polylactide is discussed in detail. Execution of enzymes in place of inorganic catalysts is the most green alternative for sustainable and environment friendly synthesis of products on an industrial scale. Robust immobilization and consequently performance of enzyme is the essential objective of enzyme application in industry. Water bound to the surface of an enzyme (contact class of water molecules) is inevitable for enzyme performance; it controls enzyme dynamics via flexibility changes and has intensive influence on enzyme activity. The value of pH during immobilization of CALB plays a critical role in fixing the active conformation of an enzyme. Comprehensive selection of support and protocol can develop a robust immobilized enzyme thus enhancing its performance. Organic solvents with a log P value higher than four are more suitable for enzymatic catalysis as these solvents tend to strip away very little of the enzyme surface bound water molecules. Alternatively ionic liquid can work as a more promising reaction media. Covalent immobilization is an exclusively reliable technique to circumvent the leaching of enzymes and to enhance stability. Activated polystyrene nanoparticles can prove to be a practical and economical support for chemical immobilization of CALB. In order to reduce the E-factor for the synthesis of biodegradable polymers; enzymatic ring opening polyester synthesis (eROPS) of cyclic monomers is a more sensible route for polyester synthesis. Synergies obtained from ionic liquids and immobilized enzyme can be much effective eROPS.
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Affiliation(s)
- Ani Idris
- Department of Bioprocess Engineering, Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia.
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79
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Zhang L, Liu S, Ji H, Zhang C, Deng C, Cao W, Mao W, Gao J. Inactivation of polyphenol oxidase from Pacific white shrimp by dense phase carbon dioxide. INNOV FOOD SCI EMERG 2011. [DOI: 10.1016/j.ifset.2011.05.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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80
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Kuo CH, Ju HY, Chu SW, Chen JH, Chang CMJ, Liu YC, Shieh CJ. Optimization of Lipase-Catalyzed Synthesis of Cetyl Octanoate in Supercritical Carbon Dioxide. J AM OIL CHEM SOC 2011. [DOI: 10.1007/s11746-011-1895-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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81
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Kirk MF. Variation in energy available to populations of subsurface anaerobes in response to geological carbon storage. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:6676-82. [PMID: 21740040 DOI: 10.1021/es201279e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Microorganisms can strongly influence the chemical and physical properties of the subsurface. Changes in microbial activity caused by geological CO(2) storage, therefore, have the potential to influence the capacity, injectivity, and integrity of CO(2) storage reservoirs and ultimately the environmental impact of CO(2) injection. This analysis uses free energy calculations to examine variation in energy available to Fe(III) and SO(4)(2-) reducers and methanogens because of changes in the bulk composition of brine and shallow groundwater following subsurface CO(2) injection. Calculations were performed using data from two field experiments, the Frio Formation experiment and an experiment at the Zero Emission Research and Technology test site. Energy available for Fe(III) reduction increased significantly during CO(2) injection in both experiments, largely because of a decrease in pH from near-neutral levels to just below 6. Energy available to SO(4)(2-) reducers and methanogens varied little. These changes can lead to a greater rate of microbial Fe(III) reduction following subsurface CO(2) injection in reservoirs where Fe(III) oxides or oxyhydroxides are available and the rate of Fe(III) reduction is limited by energy available prior to injection.
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Affiliation(s)
- Matthew F Kirk
- Geochemistry Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-0754, United States.
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82
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Utczás M, Székely E, Forró E, Szőllősy Á, Fülöp F, Simándi B. Enzymatic resolution of trans-2-hydroxycyclohexanecarbonitrile in supercritical carbon dioxide. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.05.096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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83
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Simple and efficient immobilization of lipase B from Candida antarctica on porous styrene–divinylbenzene beads. Enzyme Microb Technol 2011; 49:72-8. [PMID: 22112274 DOI: 10.1016/j.enzmictec.2011.03.002] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Revised: 03/09/2011] [Accepted: 03/09/2011] [Indexed: 11/22/2022]
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84
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Hernandez K, Garcia-Verdugo E, Porcar R, Fernandez-Lafuente R. Hydrolysis of triacetin catalyzed by immobilized lipases: effect of the immobilization protocol and experimental conditions on diacetin yield. Enzyme Microb Technol 2011; 48:510-7. [PMID: 22113024 DOI: 10.1016/j.enzmictec.2011.02.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 02/09/2011] [Accepted: 02/09/2011] [Indexed: 11/24/2022]
Abstract
The effect of the immobilization protocol and some experimental conditions (pH value and presence of acetonitrile) on the regioselective hydrolysis of triacetin to diacetin catalyzed by lipases has been studied. Lipase B from Candida antarctica (CALB) and lipase from Rhizomucor miehei (RML) were immobilized on Sepabeads (commercial available macroporous acrylic supports) activated with glutaraldehyde (covalent immobilization) or octadecyl groups (adsorption via interfacial activation). All the biocatalysts accumulated diacetin. Covalently immobilized RML was more active towards rac-methyl mandelate than the adsorbed RML. However, this covalent RML preparation presented the lowest activity towards triacetin. For this reason, this preparation was discarded as biocatalyst for this reaction. At pH 7, acyl migration occurred giving a mixture of 1,2 and 1,3 diacetin, but at pH 5.5, only 1,2 diacetin was produced. Yields were improved at acidic pH values and in the presence of 20% acetonitrile (to over 95%). RML immobilized on octadecyl Sepabeads was proposed as optimal preparation, mainly due to its higher specific activity. Each enzyme preparation presented very different properties. Moreover, changes in the reaction conditions affected the various immobilized enzymes in a different way.
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Affiliation(s)
- Karel Hernandez
- Departamento de Biocatalisis, Instituto de Catálisis-CSIC, Campus UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
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Mun S, Hahn JS, Lee YW, Yoon J. Inactivation behavior of Pseudomonas aeruginosa by supercritical N2O compared to supercritical CO2. Int J Food Microbiol 2011; 144:372-8. [PMID: 21078533 DOI: 10.1016/j.ijfoodmicro.2010.10.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 10/14/2010] [Accepted: 10/19/2010] [Indexed: 10/18/2022]
Affiliation(s)
- Sungmin Mun
- World Class University (WCU) program of Chemical Convergence for Energy & Environment (C₂E₂), College of Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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Deactivation of isoamylase and β-amylase in the agitated reactor under supercritical carbon dioxide. Bioprocess Biosyst Eng 2010; 33:1007-15. [DOI: 10.1007/s00449-010-0425-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Accepted: 03/23/2010] [Indexed: 11/26/2022]
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