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Ibrahim MA, Alhalafi MH, Emam EAM, Ibrahim H, Mosaad RM. A Review of Chitosan and Chitosan Nanofiber: Preparation, Characterization, and Its Potential Applications. Polymers (Basel) 2023; 15:2820. [PMID: 37447465 DOI: 10.3390/polym15132820] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/13/2023] [Accepted: 06/15/2023] [Indexed: 07/15/2023] Open
Abstract
Chitosan is produced by deacetylating the abundant natural chitin polymer. It has been employed in a variety of applications due to its unique solubility as well as its chemical and biological properties. In addition to being biodegradable and biocompatible, it also possesses a lot of reactive amino side groups that allow for chemical modification and the creation of a wide range of useful derivatives. The physical and chemical characteristics of chitosan, as well as how it is used in the food, environmental, and medical industries, have all been covered in a number of academic publications. Chitosan offers a wide range of possibilities in environmentally friendly textile processes because of its superior absorption and biological characteristics. Chitosan has the ability to give textile fibers and fabrics antibacterial, antiviral, anti-odor, and other biological functions. One of the most well-known and frequently used methods to create nanofibers is electrospinning. This technique is adaptable and effective for creating continuous nanofibers. In the field of biomaterials, new materials include nanofibers made of chitosan. Numerous medications, including antibiotics, chemotherapeutic agents, proteins, and analgesics for inflammatory pain, have been successfully loaded onto electro-spun nanofibers, according to recent investigations. Chitosan nanofibers have several exceptional qualities that make them ideal for use in important pharmaceutical applications, such as tissue engineering, drug delivery systems, wound dressing, and enzyme immobilization. The preparation of chitosan nanofibers, followed by a discussion of the biocompatibility and degradation of chitosan nanofibers, followed by a description of how to load the drug into the nanofibers, are the first issues highlighted by this review of chitosan nanofibers in drug delivery applications. The main uses of chitosan nanofibers in drug delivery systems will be discussed last.
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Affiliation(s)
- Marwan A Ibrahim
- Department of Biology, College of Science, Majmaah University, Al-Majmaah 11952, Saudi Arabia
- Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo 11566, Egypt
| | - Mona H Alhalafi
- Department of Chemistry, College of Science, Majmaah University, Al-Majmaah 11952, Saudi Arabia
| | - El-Amir M Emam
- Faculty of Applied Arts, Textile Printing, Dyeing and Finishing Department, Helwan University, Cairo 11795, Egypt
| | - Hassan Ibrahim
- Pretreatment and Finishing of Cellulosic Fibers Department, Textile Research and Technology Institute, National Research Centre, Cairo 12622, Egypt
| | - Rehab M Mosaad
- Department of Biology, College of Science, Majmaah University, Al-Majmaah 11952, Saudi Arabia
- Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo 11566, Egypt
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Fellechner O, Blatkiewicz M, Smirnova I. Reactive Separations for In Situ Product Removal of Enzymatic Reactions: A Review. CHEM-ING-TECH 2019. [DOI: 10.1002/cite.201900027] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Oliver Fellechner
- Hamburg University of Technology Institute of Thermal Separation Processes Eißendorfer Straße 38 21073 Hamburg Germany
| | - Michał Blatkiewicz
- Hamburg University of Technology Institute of Thermal Separation Processes Eißendorfer Straße 38 21073 Hamburg Germany
| | - Irina Smirnova
- Hamburg University of Technology Institute of Thermal Separation Processes Eißendorfer Straße 38 21073 Hamburg Germany
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Enhancement of Pyruvate Productivity in Candida glabrata by Deleting the CgADE13 Gene to Improve Acid Tolerance. BIOTECHNOL BIOPROC E 2018. [DOI: 10.1007/s12257-018-0201-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Liquid-liquid extraction, COSMO-SAC predictions and process flow sheeting of 1-butanol enhancement using mesitylene and oleyl alcohol. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.06.088] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hannya A, Nishimura T, Matsushita I, Tsubota J, Kawata Y. Efficient production and secretion of oxaloacetate from Halomonas sp. KM-1 under aerobic conditions. AMB Express 2017; 7:209. [PMID: 29164422 PMCID: PMC5698238 DOI: 10.1186/s13568-017-0516-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/15/2017] [Indexed: 11/10/2022] Open
Abstract
The alkaliphilic, halophilic bacterium Halomonas sp. KM-1 can utilize glucose for the intracellular storage of the bioplastic poly-(R)-3-hydroxybutyric acid (PHB) and extracellular secretion of pyruvate under aerobic conditions. In this study, we investigated the effects of sodium chloride concentration on PHB accumulation and pyruvate secretion in the KM-1 strain and, unexpectedly, observed that oxaloacetate, an important intermediate chemical in the TCA cycle, glycogenesis, and aspartic acid biosynthesis, was secreted. We then further analyzed oxaloacetate productivity after changing the sodium chloride additive concentration, additive time-shift, and culture temperature. In 42-h batch-cultivation experiments, we found that wild-type Halomonas sp. KM-1 secreted 39.0 g/L oxaloacetate at a rate of 0.93 g/(L h). The halophilic bacteria Halomonas has already gained attention for industrial chemical-production processes owing to its unique properties, such as contamination-free culture conditions and a tolerance for high substrate concentrations. Moreover, no commercial scale oxaloacetate production was previously reported to result from bacterial fermentation. Oxaloacetate is an important intermediate chemical in biosynthesis and is used as a health food based on its role in energy synthesis. Thus, these data provided important insights into the production of oxaloacetate and other derivative chemicals using this strain.
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Saturated mutagenesis of ketoisovalerate decarboxylase V461 enabled specific synthesis of 1-pentanol via the ketoacid elongation cycle. Sci Rep 2017; 7:11284. [PMID: 28900255 PMCID: PMC5595793 DOI: 10.1038/s41598-017-11624-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 08/25/2017] [Indexed: 11/25/2022] Open
Abstract
Iterative ketoacid elongation has been an essential tool in engineering artificial metabolism, in particular the synthetic alcohols. However, precise control of product specificity is still greatly challenged by the substrate promiscuity of the ketoacid decarboxylase, which unselectively hijacks ketoacid intermediates from the elongation cycle along with the target ketoacid. In this work, preferential tuning of the Lactococcus lactis ketoisovalerate decarboxylase (Kivd) specificity toward 1-pentanol synthesis was achieved via saturated mutagenesis of the key residue V461 followed by screening of the resulting alcohol spectrum. Substitution of V461 with the small and polar amino acid glycine or serine significantly improved the Kivd selectivity toward the 1-pentanol precursor 2-ketocaproate by lowering its catalytic efficiency for the upstream ketoacid 2-ketobutyrate and 2-ketovalerate. Conversely, replacing V461 with bulky or charged side chains displayed severely adverse effect. Increasing supply of the iterative addition unit acetyl-CoA by acetate feeding further drove 2-ketoacid flux into the elongation cycle and enhanced 1-pentanol productivity. The Kivd V461G variant enabled a 1-pentanol production specificity around 90% of the total alcohol content with or without oleyl alcohol extraction. This work adds insight to the selectivity of Kivd active site.
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Crz1p Regulates pH Homeostasis in Candida glabrata by Altering Membrane Lipid Composition. Appl Environ Microbiol 2016; 82:6920-6929. [PMID: 27663025 DOI: 10.1128/aem.02186-16] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Accepted: 09/02/2016] [Indexed: 12/17/2022] Open
Abstract
The asexual facultative aerobic haploid yeast Candida glabrata is widely used in the industrial production of various organic acids. To elucidate the physiological function of the C. glabrata transcription factor Crz1p (CgCrz1p) and its role in tolerance to acid stress, we deleted or overexpressed the corresponding gene, CgCRZ1 Deletion of CgCRZ1 resulted in a 60% decrease in the dry weight of cells (DCW) and a 50% drop in cell viability compared with those of the wild type at pH 2.0. Expression of lipid metabolism-associated genes was also significantly downregulated. Consequently, the proportion of C18:1 fatty acids, the ratio of unsaturated to saturated fatty acids, and the ergosterol content decreased by 30%, 46%, and 30%, respectively. Additionally, membrane integrity, fluidity, and H+-ATPase activity were reduced by 45%, 9%, and 50%, respectively. In contrast, overexpression of CgCrz1p increased C18:1 and ergosterol contents by 16% and 40%, respectively. Overexpression also enhanced membrane integrity, fluidity, and H+-ATPase activity by 31%, 6%, and 20%, respectively. Moreover, in the absence of pH buffering, the DCW and pyruvate titers increased by 48% and 60%, respectively, compared to that of the wild type. Together, these results suggest that CgCrz1p regulates tolerance to acidic conditions by altering membrane lipid composition in C. glabrataIMPORTANCE This study provides insight into the metabolism of Candida glabrata under acidic conditions, such as those encountered during the industrial production of organic acids. We found that overexpression of the transcription factor CgCrz1p improved viability, biomass, and pyruvate yields at a low pH. Analysis of plasma membrane lipid composition indicated that CgCrz1p might play an important role in its integrity and fluidity and that it enhanced the pumping of protons in acidic environments. We propose that altering the structure of the cell membrane may provide a successful strategy for increasing C. glabrata productivity at a low pH.
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Molitor B, Richter H, Martin ME, Jensen RO, Juminaga A, Mihalcea C, Angenent LT. Carbon recovery by fermentation of CO-rich off gases - Turning steel mills into biorefineries. BIORESOURCE TECHNOLOGY 2016; 215:386-396. [PMID: 27095410 DOI: 10.1016/j.biortech.2016.03.094] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 03/16/2016] [Accepted: 03/17/2016] [Indexed: 05/08/2023]
Abstract
Technological solutions to reduce greenhouse gas (GHG) emissions from anthropogenic sources are required. Heavy industrial processes, such as steel making, contribute considerably to GHG emissions. Fermentation of carbon monoxide (CO)-rich off gases with wild-type acetogenic bacteria can be used to produce ethanol, acetate, and 2,3-butanediol, thereby, reducing the carbon footprint of heavy industries. Here, the processes for the production of ethanol from CO-rich off gases are discussed and a perspective on further routes towards an integrated biorefinery at a steel mill is given. Recent achievements in genetic engineering as well as integration of other biotechnology platforms to increase the product portfolio are summarized. Already, yields have been increased and the portfolio of products broadened. To develop a commercially viable process, however, the extraction from dilute product streams is a critical step and alternatives to distillation are discussed. Finally, another critical step is waste(water) treatment with the possibility to recover resources.
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Affiliation(s)
- Bastian Molitor
- Department of Biological and Environmental Engineering, Cornell University, Riley-Robb Hall, Ithaca, NY 14853, United States
| | - Hanno Richter
- Department of Biological and Environmental Engineering, Cornell University, Riley-Robb Hall, Ithaca, NY 14853, United States
| | - Michael E Martin
- LanzaTech, 8045 Lamon Avenue, Suite 400, Skokie, IL 60077, United States
| | - Rasmus O Jensen
- LanzaTech, 8045 Lamon Avenue, Suite 400, Skokie, IL 60077, United States
| | - Alex Juminaga
- LanzaTech, 8045 Lamon Avenue, Suite 400, Skokie, IL 60077, United States
| | | | - Largus T Angenent
- Department of Biological and Environmental Engineering, Cornell University, Riley-Robb Hall, Ithaca, NY 14853, United States.
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Integration of ethanol removal using carbon nanotube (CNT)-mixed membrane and ethanol fermentation by self-flocculating yeast for antifouling ethanol recovery. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.05.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kawata Y, Nishimura T, Matsushita I, Tsubota J. Efficient production and secretion of pyruvate from Halomonas sp. KM-1 under aerobic conditions. AMB Express 2016; 6:22. [PMID: 26989057 PMCID: PMC4798600 DOI: 10.1186/s13568-016-0195-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 03/11/2016] [Indexed: 11/10/2022] Open
Abstract
The alkaliphilic, halophilic bacterium Halomonas sp. KM-1 can utilize both hexose and pentose sugars for the intracellular storage of bioplastic poly-(R)-3-hydroxybutyric acid (PHB) under aerobic conditions. In this study, we investigated the effects of the sodium nitrate concentration on PHB accumulation in the KM-1 strain. Unexpectedly, we observed the secretion of pyruvate, a central intermediate in carbon- and energy-metabolism processes in all organisms; therefore, pyruvate is widely used as a starting material in the industrial biosynthesis of pharmaceuticals and is employed for the production of crop-protection agents, polymers, cosmetics, and food additives. We then further analyzed pyruvate productivity following changes in culture temperature and the buffer concentration. In 48-h batch-cultivation experiments, we found that wild-type Halomonas sp. KM-1 secreted 63.3 g/L pyruvate at a rate of 1.32 g/(L·h), comparable to the results of former studies using mutant and recombinant microorganisms. Thus, these data provided important insights into the production of pyruvate using this novel strain.
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Efficient butanol-ethanol (B-E) production from carbon monoxide fermentation by Clostridium carboxidivorans. Appl Microbiol Biotechnol 2016; 100:3361-70. [PMID: 26810079 DOI: 10.1007/s00253-015-7238-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 12/04/2015] [Accepted: 12/07/2015] [Indexed: 01/13/2023]
Abstract
The fermentation of waste gases rich in carbon monoxide using acetogens is an efficient way to obtain valuable biofuels like ethanol and butanol. Different experiments were carried out with the bacterial species Clostridium carboxidivorans as biocatalyst. In batch assays with no pH regulation, after complete substrate exhaustion, acetic acid, butyric acid, and ethanol were detected while only negligible butanol production was observed. On the other side, in bioreactors, with continuous carbon monoxide supply and pH regulation, both C2 and C4 fatty acids were initially formed as well as ethanol and butanol at concentrations never reported before for this type of anaerobic bioconversion of gaseous C1 compounds, showing that the operating conditions significantly affect the metabolic fermentation profile and butanol accumulation. Maximum ethanol and butanol concentrations in the bioreactors were obtained at pH 5.75, reaching values of 5.55 and 2.66 g/L, respectively. The alcohols were produced both from CO fermentation as well as from the bioconversion of previously accumulated acetic and butyric acids, resulting in low residual concentrations of such acids at the end of the bioreactor experiments. CO consumption was often around 50% and reached up to more than 80%. Maximum specific rates of ethanol and butanol production were reached at pH 4.75, with values of 0.16 g/h*g of biomass and 0.07 g/h*g of biomass, respectively, demonstrating that a low pH was more favorable to solventogenesis in this process, although it negatively affects biomass growth which does also play a role in the final alcohol titer.
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Stripping of ethanol with CO2 in bubble columns: Effects of operating conditions and modeling. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2015.06.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Staggs KW, Nielsen DR. Improving n-butanol production in batch and semi-continuous processes through integrated product recovery. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.06.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Waluga T, Scholl S. Process Design Aspects for Reaction-Integrated Adsorption in Multi-Enzymatic Catalysis*. Chem Eng Technol 2015. [DOI: 10.1002/ceat.201500166] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Wu J, Chen X, Cai L, Tang L, Liu L. Transcription factors Asg1p and Hal9p regulate pH homeostasis in Candida glabrata. Front Microbiol 2015; 6:843. [PMID: 26347728 PMCID: PMC4539521 DOI: 10.3389/fmicb.2015.00843] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 08/03/2015] [Indexed: 12/27/2022] Open
Abstract
Candida glabrata is an important microorganism used in commercial fermentation to produce pyruvate, but very little is known about its mechanisms for surviving acid stress in culture. In this study, it was shown that transcription factors Asg1p and Hal9p play essential roles in C. glabrata in the tolerance of acid stress, as the deletion of CgASG1 or CgHAL9 resulted in the inability to survive in an acidic environment. Cgasg1Δ and Cghal9Δ mutant strains are unable to maintain pH homeostasis, as evidenced by a decrease in intracellular pH and an increase in reactive oxygen species production, which results in metabolic disorders. The results showed that intracellular acidification was partly due to the diminished activity of the plasma membrane proton pump, CgPma1p. In addition, transcriptome sequencing revealed that Cgasg1Δ and Cghal9Δ mutant strains displayed a variety of changes in gene expression under acidic conditions, including genes in the MAPK signaling pathway, plasma membrane, or cell wall organization, trehalose accumulation, and the RIM101 signaling pathway. Lastly, quantitative reverse-transcribed PCR and cellular localization showed that CgAsg1p and CgHal9p played independent roles in response to acid stress.
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Affiliation(s)
- Jing Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University Wuxi, China ; The Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University Wuxi, China
| | - Xiulai Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University Wuxi, China ; The Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University Wuxi, China
| | - Lijun Cai
- State Key Laboratory of Food Science and Technology, Jiangnan University Wuxi, China ; The Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University Wuxi, China
| | - Lei Tang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University Wuxi, China
| | - Liming Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University Wuxi, China ; The Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University Wuxi, China
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Wu J, Zhuang W, Ying H, Jiao P, Li R, Wen Q, Wang L, Zhou J, Yang P. Acetone-butanol-ethanol competitive sorption simulation from single, binary, and ternary systems in a fixed-bed of KA-I resin. Biotechnol Prog 2014; 31:124-34. [DOI: 10.1002/btpr.2019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 09/13/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Jinglan Wu
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing 210009 P. R. China
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Wei Zhuang
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing 210009 P. R. China
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Hanjie Ying
- State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing 210009 P. R. China
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Pengfei Jiao
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Renjie Li
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Qingshi Wen
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Lili Wang
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Jingwei Zhou
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
| | - Pengpeng Yang
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009 P. R. China
- National Engineering Technique Research Center for Biotechnology; Nanjing 211816 P. R. China
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Talnikar VD, Mahajan YS. Recovery of acids from dilute streams : A review of process technologies. KOREAN J CHEM ENG 2014. [DOI: 10.1007/s11814-014-0202-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Xue C, Zhao JB, Chen LJ, Bai FW, Yang ST, Sun JX. Integrated butanol recovery for an advanced biofuel: current state and prospects. Appl Microbiol Biotechnol 2014; 98:3463-74. [DOI: 10.1007/s00253-014-5561-6] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 01/17/2014] [Accepted: 01/20/2014] [Indexed: 12/12/2022]
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Wiehn M, Staggs K, Wang Y, Nielsen DR. In situ butanol recovery fromClostridium acetobutylicumfermentations by expanded bed adsorption. Biotechnol Prog 2013; 30:68-78. [DOI: 10.1002/btpr.1841] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 11/18/2013] [Indexed: 01/19/2023]
Affiliation(s)
- Michael Wiehn
- Chemical Engineering; School for Engineering of Matter, Transport, and Energy, Arizona State University; Tempe AZ 85287-6106
| | - Kyle Staggs
- Chemical Engineering; School for Engineering of Matter, Transport, and Energy, Arizona State University; Tempe AZ 85287-6106
| | - Yuchen Wang
- Chemical Engineering; School for Engineering of Matter, Transport, and Energy, Arizona State University; Tempe AZ 85287-6106
| | - David R. Nielsen
- Chemical Engineering; School for Engineering of Matter, Transport, and Energy, Arizona State University; Tempe AZ 85287-6106
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Waluga T, Zein M, Jördening HJ, Scholl S. Simulation der reaktionsintegrierten Adsorption von trienzymatisch produzierter Laminaribiose. CHEM-ING-TECH 2013. [DOI: 10.1002/cite.201300065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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23
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Carstensen F, Kasperidus T, Wessling M. Overcoming the drawbacks of microsieves with micromeshes for in situ product recovery. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Xue YP, Xu M, Chen HS, Liu ZQ, Wang YJ, Zheng YG. A Novel Integrated Bioprocess for Efficient Production of (R)-(−)-Mandelic Acid with Immobilized Alcaligenes faecalis ZJUTB10. Org Process Res Dev 2013. [DOI: 10.1021/op3001993] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ya-Ping Xue
- Institute of Bioengineering, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
- Engineering Research
Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
| | - Ming Xu
- Zhejiang Laiyi Biotechnology Co., Ltd., Shengzhou 312400, Zhejiang, China
| | - Hong-Sheng Chen
- Institute of Bioengineering, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
- Engineering Research
Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
| | - Zhi-Qiang Liu
- Institute of Bioengineering, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
- Engineering Research
Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
| | - Ya-Jun Wang
- Institute of Bioengineering, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
- Engineering Research
Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
| | - Yu-Guo Zheng
- Institute of Bioengineering, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
- Engineering Research
Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou
310014, Zhejiang, China
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Urbanus J, Roelands C, Verdoes D, ter Horst J. Intensified crystallization in complex media: Heuristics for crystallization of platform chemicals. Chem Eng Sci 2012. [DOI: 10.1016/j.ces.2012.02.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Nasrollahnejad T, Urbanus J, ter Horst JH, Verdoes D, Roelands CP. Electrochemically Induced Crystallization as a Sustainable Method for Product Recovery of Building Block Chemicals: Techno-Economic Evaluation of Fumaric Acid Separation. Ind Biotechnol (New Rochelle N Y) 2012. [DOI: 10.1089/ind.2011.0012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Tahmineh Nasrollahnejad
- Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Delft, The Netherlands
| | - Johan Urbanus
- Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Delft, The Netherlands
| | - Joop H. ter Horst
- Intensified Reaction & Separation Systems, Process & Energy Laboratory, Delft University of Technology, Delft, The Netherlands
| | - Dirk Verdoes
- Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Delft, The Netherlands
| | - Cornelis P.M. Roelands
- Intensified Reaction & Separation Systems, Process & Energy Laboratory, Delft University of Technology, Delft, The Netherlands
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Liu H, Yu C, Feng D, Cheng T, Meng X, Liu W, Zou H, Xian M. Production of extracellular fatty acid using engineered Escherichia coli. Microb Cell Fact 2012; 11:41. [PMID: 22471973 PMCID: PMC3428649 DOI: 10.1186/1475-2859-11-41] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 04/03/2012] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND As an alternative for economic biodiesel production, the microbial production of extracellular fatty acid from renewable resources is receiving more concerns recently, since the separation of fatty acid from microorganism cells is normally involved in a series of energy-intensive steps. Many attempts have been made to construct fatty acid producing strains by targeting genes in the fatty acid biosynthetic pathway, while few studies focused on the cultivation process and the mass transfer kinetics. RESULTS In this study, both strain improvements and cultivation process strategies were applied to increase extracellular fatty acid production by engineered Escherichia coli. Our results showed overexpressing 'TesA and the deletion of fadL in E. coli BL21 (DE3) improved extracellular fatty acid production, while deletion of fadD didn't strengthen the extracellular fatty acid production for an undetermined mechanism. Moreover, the cultivation process controls contributed greatly to extracellular fatty acid production with respect to titer, cell growth and productivity by adjusting the temperature, adding ampicillin and employing on-line extraction. Under optimal conditions, the E. coli strain (pACY-'tesA-ΔfadL) produced 4.8 g L⁻¹ extracellular fatty acid, with the specific productivity of 0.02 g h⁻¹ g⁻¹ dry cell mass, and the yield of 4.4% on glucose, while the ratios of cell-associated fatty acid versus extracellular fatty acid were kept below 0.5 after 15 h of cultivation. The fatty acids included C12:1, C12:0, C14:1, C14:0, C16:1, C16:0, C18:1, C18:0. The composition was dominated by C14 and C16 saturated and unsaturated fatty acids. Using the strain pACY-'tesA, similar results appeared under the same culture conditions and the titer was also much higher than that ever reported previously, which suggested that the supposedly superior strain did not necessarily perform best for the efficient production of desired product. The strain pACY-'tesA could also be chosen as the original strain for the next genetic manipulations. CONCLUSIONS The general strategy of metabolic engineering for the extracellular fatty acid production should be the cyclic optimization between cultivation performance and strain improvements. On the basis of our cultivation process optimization, strain improvements should be further carried out for the effective and cost-effective production process.
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Affiliation(s)
- Hui Liu
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Chao Yu
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Dexin Feng
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Tao Cheng
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Xin Meng
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Wei Liu
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Huibin Zou
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Mo Xian
- Key Laboratory of Biofuel, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
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Carstensen F, Apel A, Wessling M. In situ product recovery: Submerged membranes vs. external loop membranes. J Memb Sci 2012. [DOI: 10.1016/j.memsci.2011.11.029] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Heerema L, Roelands M, Goetheer E, Verdoes D, Keurentjes J. In-Situ Product Removal from Fermentations by Membrane Extraction: Conceptual Process Design and Economics. Ind Eng Chem Res 2011. [DOI: 10.1021/ie102551g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Louise Heerema
- Separation Technology, TNO Science and Industry, P.O. Box 6012 2600 JA Delft, The Netherlands
| | - Mark Roelands
- Separation Technology, TNO Science and Industry, P.O. Box 6012 2600 JA Delft, The Netherlands
| | - Earl Goetheer
- Separation Technology, TNO Science and Industry, P.O. Box 6012 2600 JA Delft, The Netherlands
| | - Dirk Verdoes
- Separation Technology, TNO Science and Industry, P.O. Box 6012 2600 JA Delft, The Netherlands
| | - Jos Keurentjes
- Chemical Engineering and Chemistry, Process Development Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
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Importance of stability study of continuous systems for ethanol production. J Biotechnol 2011; 151:43-55. [DOI: 10.1016/j.jbiotec.2010.10.073] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2010] [Revised: 09/02/2010] [Accepted: 10/15/2010] [Indexed: 11/20/2022]
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32
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Urbanus J, Bisselink R, Nijkamp K, ter Horst J, Verdoes D, Roelands C. Integrated product removal of slightly water-soluble carboxylates from fermentation by electrochemically induced crystallization. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2010.07.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Xu S, Zhou J, Liu L, Chen J. Proline enhances Torulopsis glabrata growth during hyperosmotic stress. BIOTECHNOL BIOPROC E 2010. [DOI: 10.1007/s12257-009-0131-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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36
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Saravanan V, Waijers D, Ziari M, Noordermeer M. Recovery of 1-butanol from aqueous solutions using zeolite ZSM-5 with a high Si/Al ratio; suitability of a column process for industrial applications. Biochem Eng J 2010. [DOI: 10.1016/j.bej.2009.11.008] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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Maintaining high anaerobic succinic acid productivity by product removal. Bioprocess Biosyst Eng 2009; 33:711-8. [PMID: 19921276 DOI: 10.1007/s00449-009-0393-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Accepted: 10/25/2009] [Indexed: 10/20/2022]
Abstract
During dual-phase fermentations using Escherichia coli engineered for succinic acid production, the productivity and viable cell concentration decrease as the concentration of succinic acid increases. The effects of succinic acid on the fermentation kinetics, yield, and cell viability were investigated by resuspending cells in fresh media after selected fermentation times. The cellular succinic acid productivity could be restored, but cell viability continuously decreased throughout the fermentations by up to 80% and subsequently the volumetric productivity was reduced. Omitting complex nutrients in the resuspension media had no significant effect on cellular succinate productivity and yield, although the viable cell concentration and thus the volumetric productivity was reduced by approximately 20%. By resuspending the cells, the amount of succinate produced during a 100-h fermentation was increased by more than 60%. The results demonstrate that by product removal succinic acid productivity can be maintained at high levels for extended periods of time.
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38
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Gong J, Zheng H, Wu Z, Chen T, Zhao X. Genome shuffling: Progress and applications for phenotype improvement. Biotechnol Adv 2009; 27:996-1005. [DOI: 10.1016/j.biotechadv.2009.05.016] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Mejía SM, Espinal JF, Mondragón F. Cooperative effects on the structure and stability of (ethanol)3–water, (methanol)3–water heterotetramers and (ethanol)4, (methanol)4 tetramers. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.01.027] [Citation(s) in RCA: 24] [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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40
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Jiang X, Meng X, Xian M. Biosynthetic pathways for 3-hydroxypropionic acid production. Appl Microbiol Biotechnol 2009; 82:995-1003. [DOI: 10.1007/s00253-009-1898-7] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2008] [Revised: 01/25/2009] [Accepted: 01/25/2009] [Indexed: 11/28/2022]
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41
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Nielsen DR, Prather KJ. In situ product recovery ofn-butanol using polymeric resins. Biotechnol Bioeng 2009; 102:811-21. [DOI: 10.1002/bit.22109] [Citation(s) in RCA: 146] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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van den Berg C, Roelands M, Bussmann P, Goetheer E, Verdoes D, van der Wielen L. Extractant Selection Strategy for Solvent-Impregnated Resins in Fermentations. Ind Eng Chem Res 2008. [DOI: 10.1021/ie800973y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Corjan van den Berg
- Department of Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Schoemakerstraat 97, 2628 VK Delft, P.O. BOX 6012, Netherlands, Department of Food & Biotechnology Innovations, Dutch Institute for Applied Science (TNO), Utrechtseweg 48, 3704 HE Zeist, Netherlands, and Department of Biotechnology, Technical University of Delft, Julianalaan 67, 2628 BC Delft, Netherlands
| | - Mark Roelands
- Department of Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Schoemakerstraat 97, 2628 VK Delft, P.O. BOX 6012, Netherlands, Department of Food & Biotechnology Innovations, Dutch Institute for Applied Science (TNO), Utrechtseweg 48, 3704 HE Zeist, Netherlands, and Department of Biotechnology, Technical University of Delft, Julianalaan 67, 2628 BC Delft, Netherlands
| | - Paul Bussmann
- Department of Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Schoemakerstraat 97, 2628 VK Delft, P.O. BOX 6012, Netherlands, Department of Food & Biotechnology Innovations, Dutch Institute for Applied Science (TNO), Utrechtseweg 48, 3704 HE Zeist, Netherlands, and Department of Biotechnology, Technical University of Delft, Julianalaan 67, 2628 BC Delft, Netherlands
| | - Earl Goetheer
- Department of Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Schoemakerstraat 97, 2628 VK Delft, P.O. BOX 6012, Netherlands, Department of Food & Biotechnology Innovations, Dutch Institute for Applied Science (TNO), Utrechtseweg 48, 3704 HE Zeist, Netherlands, and Department of Biotechnology, Technical University of Delft, Julianalaan 67, 2628 BC Delft, Netherlands
| | - Dirk Verdoes
- Department of Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Schoemakerstraat 97, 2628 VK Delft, P.O. BOX 6012, Netherlands, Department of Food & Biotechnology Innovations, Dutch Institute for Applied Science (TNO), Utrechtseweg 48, 3704 HE Zeist, Netherlands, and Department of Biotechnology, Technical University of Delft, Julianalaan 67, 2628 BC Delft, Netherlands
| | - Luuk van der Wielen
- Department of Separation Technology, Netherlands Organization for Applied Scientific Research (TNO), Schoemakerstraat 97, 2628 VK Delft, P.O. BOX 6012, Netherlands, Department of Food & Biotechnology Innovations, Dutch Institute for Applied Science (TNO), Utrechtseweg 48, 3704 HE Zeist, Netherlands, and Department of Biotechnology, Technical University of Delft, Julianalaan 67, 2628 BC Delft, Netherlands
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43
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Offeman RD, Stephenson SK, Franqui D, Cline JL, Robertson GH, Orts WJ. Extraction of ethanol with higher alcohol solvents and their toxicity to yeast. Sep Purif Technol 2008. [DOI: 10.1016/j.seppur.2008.06.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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44
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Ghorbanian SA, Abolghasemi H, Radpour SR, Mousavian MA. Developing a New Approach to Temperature and pH Effects in the Modelling of the Adsorption Isotherms of Benzoic Acid onto Activated Carbon. ADSORPT SCI TECHNOL 2008. [DOI: 10.1260/026361708786934398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Sohrab Ali Ghorbanian
- Chemical Engineering Department, Faculty of Engineering, P.O. Box 11365/4563, Tehran University, Enqilab Sq., Tehran, Iran
| | - Hossein Abolghasemi
- Chemical Engineering Department, Faculty of Engineering, P.O. Box 11365/4563, Tehran University, Enqilab Sq., Tehran, Iran
| | - Saeid Reza Radpour
- Chemical Engineering Department, Faculty of Engineering, P.O. Box 11365/4563, Tehran University, Enqilab Sq., Tehran, Iran
| | - Mohammad Ali Mousavian
- Chemical Engineering Department, Faculty of Engineering, P.O. Box 11365/4563, Tehran University, Enqilab Sq., Tehran, Iran
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45
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Roa Engel CA, Straathof AJJ, Zijlmans TW, van Gulik WM, van der Wielen LAM. Fumaric acid production by fermentation. Appl Microbiol Biotechnol 2008; 78:379-89. [PMID: 18214471 PMCID: PMC2243254 DOI: 10.1007/s00253-007-1341-x] [Citation(s) in RCA: 181] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2007] [Revised: 12/19/2007] [Accepted: 12/20/2007] [Indexed: 11/25/2022]
Abstract
The potential of fumaric acid as a raw material in the polymer industry and the increment of cost of petroleum-based fumaric acid raises interest in fermentation processes for production of this compound from renewable resources. Although the chemical process yields 112% w/w fumaric acid from maleic anhydride and the fermentation process yields only 85% w/w from glucose, the latter raw material is three times cheaper. Besides, the fermentation fixes CO2. Production of fumaric acid by Rhizopus species and the involved metabolic pathways are reviewed. Submerged fermentation systems coupled with product recovery techniques seem to have achieved economically attractive yields and productivities. Future prospects for improvement of fumaric acid production include metabolic engineering approaches to achieve low pH fermentations.
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Affiliation(s)
- Carol A. Roa Engel
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
| | - Adrie J. J. Straathof
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
| | - Tiemen W. Zijlmans
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
| | - Walter M. van Gulik
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
| | - Luuk A. M. van der Wielen
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
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46
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Zhang M, Hu P, Liang Q, Yang H, Liu Q, Wang Y, Luo G. Direct process integration of extraction and expanded bed adsorption in the recovery of crocetin derivatives from Fructus Gardenia. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 858:220-6. [PMID: 17890164 DOI: 10.1016/j.jchromb.2007.08.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2007] [Revised: 08/08/2007] [Accepted: 08/30/2007] [Indexed: 11/20/2022]
Abstract
A process that integrated an extraction tank (EXT) and an expanded bed adsorption (EBA) into a new system EXT-EBA for direct purifying crocetin derivatives from Fructus Gardenia was described. Conditions were set to allow the extraction and purification in a single step. A comparison between the integrated process and the conventional process to purify crocetin derivatives was presented. The integrated process resulted in 52.79% recovery of crocin compared to 24.12% in the conventional process. The process time and solvent used were decreased in the integrated process. The result suggests that the EXT-EBA integrates extraction, clarification, and purification in a single step, greatly simplifying the process flow and reducing the cost and time of extraction and purification of crocetin derivatives from Fructus Gardenia.
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Affiliation(s)
- Min Zhang
- Modern Engineering Center for Traditional Chinese Medicine, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
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47
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Wang Y, Li Y, Pei X, Yu L, Feng Y. Genome-shuffling improved acid tolerance and l-lactic acid volumetric productivity in Lactobacillus rhamnosus. J Biotechnol 2007; 129:510-5. [PMID: 17320995 DOI: 10.1016/j.jbiotec.2007.01.011] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2006] [Revised: 01/06/2007] [Accepted: 01/16/2007] [Indexed: 11/20/2022]
Abstract
Genome shuffling is an efficient approach for the rapid improvement of industrially important microbial phenotypes. Here we improved the acid tolerance and volumetric productivity of an industrial strain Lactobacillus rhamnosus ATCC 11443 by genome shuffling. Five strains with subtle improvements in pH tolerance and volumetric productivity were obtained from the populations generated by ultraviolet irradiation and nitrosoguanidine mutagenesis, and then they were subjected for recursive protoplast fusion. A library that was more likely to yield positive colonies was created by fusing the lethal protoplasts obtained from both ultraviolet irradiation and heat treatments. After three rounds of genome shuffling, four strains that could grow at pH 3.6 were obtained. We observed 3.1- and 2.6-fold increases in lactic acid production and cell growth of the best performing at pH 3.8, respectively. The maximum volumetric productivity was 5.77+/-0.05 g/lh when fermented with 10% glucose under neutralizing condition with CaCO(3), which was 26.5+/-1.5% higher than the wild type.
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Affiliation(s)
- Yuhua Wang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, 2519 Jiefang Road, Changchun 130023, PR China
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48
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49
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Liu L, Xu Q, Li Y, Shi Z, Zhu Y, Du G, Chen J. Enhancement of pyruvate production by osmotic-tolerant mutant of Torulopsis glabrata. Biotechnol Bioeng 2006; 97:825-32. [PMID: 17154310 DOI: 10.1002/bit.21290] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Pyruvate production by Torulopsis glabrata was used as a model to study the mechanism of product inhibition and the strategy for enhancing pyruvate production. It was found that the concentration of cell growth and pyruvate deceased with the increase of NaCl and sorbitol concentrations. To enhance the osmotic stress resistance of the strain, an NaCl-tolerant mutant RS23 was screened and selected through a pH-controlled continuous culture with 70 g/L NaCl as the selective criterion. Compared with the parent strain, mutant RS23 could grow well on the medium containing 70 g/L NaCl or 0.6 mol/L sorbitol. Pyruvate concentration by the mutant strain RS23 reached 94.3 g/L at 82 h (yield on glucose 0.635 g/g) in a 7-l fermentor with 150 g/L glucose as carbon source. Pyruvate concentration and yield of mutant RS23 were 41.1% and 11.1% higher than those of the parent strain, respectively. The strategy for enhancing pyruvate production by increasing osmotic stress resistance may provide an alternative approach to enhance organic acids production with yeast.
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Affiliation(s)
- Liming Liu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Southern Yangtze University, Wuxi 214036, China
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50
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Stephenson S, Offeman R, Robertson G, Orts W. Ethanol and water capacities of alcohols: A molecular dynamics study. Chem Eng Sci 2006. [DOI: 10.1016/j.ces.2006.05.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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