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Low pH Stress Enhances Gluconic Acid Accumulation with Enzymatic Hydrolysate as Feedstock Using Gluconobacter oxydans. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9030278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Gluconic acid has been increasingly in demand in recent years due to the wide applications in the food, healthcare and construction industries. Plant-derived biomass is rich in biopolymers that comprise glucose as the monomeric unit, which provide abundant feedstock for gluconic acid production. Gluconobacter oxydans can rapidly and incompletely oxidize glucose to gluconic acid and it is regarded as ideal industrial microorganism. Once glucose is depleted, the gluconic acid will be further bio-oxidized to 2-ketogluconic acid by Gluconobacter oxydans. The endpoint is difficult to be controlled, especially in an industrial fermentation process. In this study, it was found that the low pH environment (2.5~3.5) could limit the further metabolism of gluconic acid and that it resulted in a yield over 95%. Therefore, the low pH stress strategy for efficiently producing gluconic acid from biomass-derived glucose was put forward and investigated with enzymatic hydrolysate. As a result, 98.8 g/L gluconic acid with a yield of 96% could be obtained from concentrated corncob enzymatic hydrolysate that initially contained 100 g/L glucose with 1.4 g/L cells loading of Gluconobacter oxydans. In addition, the low pH stress strategy could effectively control end-point and decrease the risk of microbial contamination. Overall, this strategy provides a potential for industrial gluconic acid production from lignocellulosic materials.
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Kovačević G, Elgahwash RGA, Blažić M, Pantić N, Prodanović O, Balaž AM, Prodanović R. Production of fructose and gluconic acid from sucrose with cross-linked yeast cell walls expressing glucose oxidase on the surface. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Fernandes S, Belo I, Lopes M. Highly aerated cultures boost gluconic acid production by the yeast-like fungus Aureobasidium pullulans. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108133] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Selectivity and Sustainability of Electroenzymatic Process for Glucose Conversion to Gluconic Acid. Catalysts 2020. [DOI: 10.3390/catal10030269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Electroenzymatic processes are interesting solutions for the development of new processes based on renewable feedstocks, renewable energies, and green catalysts. High-selectivity and sustainability of these processes are usually assumed. In this contribution, these two aspects were studied in more detail. In a membrane-less electroenzymatic reactor, 97% product selectivity at 80% glucose conversion to gluconic acid was determined. With the help of nuclear magnetic resonance spectroscopy, two main side products were identified. The yields of D-arabinose and formic acid can be controlled by the flow rate and the electroenzymatic reactor mode of operation (fuel cell or ion-pumping). The possible pathways for the side product formation have been discussed. The electroenzymatic cathode was found to be responsible for a decrease in selectivity. The choice of the enzymatic catalyst on the cathode side led to 100% selectivity of gluconic acid at somewhat reduced conversion. Furthermore, sustainability of the electroenzymatic process is estimated based on several sustainability indicators. Although some indicators (like Space Time Yield) are favorable for electroenzymatic process, the E-factor of electroenzymatic process has to improve significantly in order to compete with the fermentation process. This can be achieved by an increase of a cycle time and/or enzyme utilization which is currently low.
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Almulaiky Y, Zeyadi M, Saleh R, Baothman O, Al-shawafi W, Al-Talhi H. Assessment of antioxidant and antibacterial properties in two types of Yemeni guava cultivars. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.07.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Tian D, Shen F, Hu J, Renneckar S, Saddler JN. Enhancing bacterial cellulose production via adding mesoporous halloysite nanotubes in the culture medium. Carbohydr Polym 2018; 198:191-196. [DOI: 10.1016/j.carbpol.2018.06.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 05/07/2018] [Accepted: 06/05/2018] [Indexed: 10/28/2022]
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Purification and concentration of gluconic acid from an integrated fermentation and membrane process using response surface optimized conditions. Front Chem Sci Eng 2018. [DOI: 10.1007/s11705-018-1721-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Oxygen-enriched fermentation of sodium gluconate by Aspergillus niger and its impact on intracellular metabolic flux distributions. Bioprocess Biosyst Eng 2017; 41:77-86. [DOI: 10.1007/s00449-017-1845-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 09/21/2017] [Indexed: 12/27/2022]
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9
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Muranaka Y, Nakagawa H, Masaki R, Maki T, Mae K. Continuous 5-Hydroxymethylfurfural Production from Monosaccharides in a Microreactor. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02017] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yosuke Muranaka
- Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Hiroyuki Nakagawa
- Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Rie Masaki
- Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Taisuke Maki
- Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Kazuhiro Mae
- Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan
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Megías-Sayago C, Ivanova S, López-Cartes C, Centeno M, Odriozola J. Gold catalysts screening in base-free aerobic oxidation of glucose to gluconic acid. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.06.046] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Gluconic acid: Properties, production methods and applications—An excellent opportunity for agro-industrial by-products and waste bio-valorization. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.08.028] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Production of valuable compounds by molds and yeasts. J Antibiot (Tokyo) 2016; 70:347-360. [PMID: 27731337 PMCID: PMC7094691 DOI: 10.1038/ja.2016.121] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/31/2016] [Accepted: 09/01/2016] [Indexed: 11/30/2022]
Abstract
We are pleased to dedicate this paper to Dr Julian E Davies. Julian is a giant among microbial biochemists. He began his professional career as an organic chemistry PhD student at Nottingham University, moved on to a postdoctoral fellowship at Columbia University, then became a lecturer at the University of Manchester, followed by a fellowship in microbial biochemistry at Harvard Medical School. In 1965, he studied genetics at the Pasteur Institute, and 2 years later joined the University of Wisconsin in the Department of Biochemistry. He later became part of Biogen as Research Director and then President. After Biogen, Julian became Chair of the Department of Microbiology at the University of British Columbia in Vancouver, Canada, where he has contributed in a major way to the reputation of this department for many years. He also served as an Adjunct Professor at the University of Geneva. Among Julian’s areas of study and accomplishment are fungal toxins including α-sarcin, chemical synthesis of triterpenes, mode of action of streptomycin and other aminoglycoside antibiotics, biochemical mechanisms of antibiotic resistance in clinical isolates of bacteria harboring resistance plasmids, their origins and evolution, secondary metabolism of microorganisms, structure and function of bacterial ribosomes, antibiotic resistance mutations in yeast ribosomes, cloning of resistance genes from an antibiotic-producing microbe, gene cloning for industrial purposes, engineering of herbicide resistance in useful crops, bleomycin-resistance gene in clinical isolates of Staphylococcus aureus and many other topics. He has been an excellent teacher, lecturing in both English and French around the world, and has organized international courses. Julian has also served on the NIH study sections, as Editor for several international journals, and was one of the founders of the journal Plasmid. We expect the impact of Julian’s accomplishments to continue into the future.
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Ajala EO, Ajala MA, Ogunniyi DS, Sunmonu MO. Kinetics of gluconic acid production and cell growth in a batch bioreactor by Aspergillus niger
using breadfruit hydrolysate. J FOOD PROCESS ENG 2016. [DOI: 10.1111/jfpe.12461] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- E. O. Ajala
- Department of Chemical Engineering; University of Ilorin; Ilorin Kwara State Nigeria
| | - M. A. Ajala
- Department of Chemical Engineering; Ladoke Akintola University of Technology; Ogbomoso Oyo State Nigeria
| | - D. S. Ogunniyi
- Department of Chemical Engineering; University of Ilorin; Ilorin Kwara State Nigeria
| | - M. O. Sunmonu
- Department of Food and Bioprocess Engineering; University of Ilorin; Ilorin Kwara State Nigeria
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Wang D, Wang C, Wei D, Shi J, Kim CH, Jiang B, Han Z, Hao J. Gluconic acid production by gad mutant of Klebsiella pneumoniae. World J Microbiol Biotechnol 2016; 32:132. [DOI: 10.1007/s11274-016-2080-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 05/05/2016] [Indexed: 11/28/2022]
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16
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Lu F, Wang Z, Zhao W, Chu J, Zhuang Y. A simple novel approach for real-time monitoring of sodium gluconate production by on-line physiological parameters in batch fermentation by Aspergillus niger. BIORESOURCE TECHNOLOGY 2016; 202:133-141. [PMID: 26706727 DOI: 10.1016/j.biortech.2015.11.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 11/27/2015] [Accepted: 11/28/2015] [Indexed: 06/05/2023]
Abstract
In this paper, approach for real-time monitoring of sodium gluconate (SG) fermentation was established for the first time by the equations which can calculate real-time key-parameters by on-line physiological data. Based on this approach, limiting factors were found out in initial fermentation F1 and then step-wise agitation increase and improved medium recipe were proposed in fermentation F2 and F3, respectively. The highest average SG production rate (16.58±0.91 g L(-1) h(-1)) was achieved in fermentation F3, which was 104.2% and 48.0% higher than those in fermentation F1 and F2, respectively. Meanwhile, due to shorter fermentation period (decreased from 34 h to 18.7 h), lower biomass (about 1.5 g L(-1)) and less by-product accumulation, the overall yield of 0.943±0.012 (mol mol(-1)) in fermentation F3 increased more than 16.0% compared to fermentation F1. This approach had been successfully applied to industrial fermentation and greatly improved SG production.
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Affiliation(s)
- Fei Lu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China
| | - Zejian Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China
| | - Wei Zhao
- Shan Dong Fuyang Biological Technology Co., Ltd, China
| | - Ju Chu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China.
| | - Yingping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China
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17
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Enhancing gluconic acid production by controlling the morphology of Aspergillus niger in submerged fermentation. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.04.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Xue DS, Wang JB, Yao SJ. High production of β-glucosidase from a marine Aspergillus niger immobilized on towel gourd vegetable sponges. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.05.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Kareem S, Banjo T. Microbial production of organic acids. Microb Biotechnol 2014. [DOI: 10.1201/b17587-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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20
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beta-Fructofuranosidase production by repeated batch fermentation with immobilized Aspergillus japonicus. J Ind Microbiol Biotechnol 2009; 36:923-8. [PMID: 19396483 DOI: 10.1007/s10295-009-0570-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2008] [Accepted: 03/24/2009] [Indexed: 10/20/2022]
Abstract
The fungus Aspergillus japonicus ATCC 20236 was immobilized in vegetal fiber and used in repeated batch fermentations of sucrose (200 g/l) for the production of beta-fructofuranosidases (FFase). The assays were performed during eight consecutive cycles that were completed in a total period of 216 h. After each 24-h cycle of fermentation (except for the first cycle, which lasted 48 h), the fermented broth was replaced by fresh medium, and the FFase activity was determined in the replaced medium. The average value of FFase activity was a constant 40.6 U/ml at the end of the initial seven cycles, but had decreased by 22% at the end of the eighth cycle. Concurrent with these high and constant FFase values, the hydrolyzing activity of this enzyme increased during the cycles, while the transfructosylating activity decreased. As a consequence, the maximum production of fructooligosaccharides of 134.60 g/l observed in the initial 30 h of fermentation (first cycle) had gradually decreased by the end of the subsequent cycles, reaching approximately 23% of this value during cycles 4-8. Based on these results, we conclude that the present immobilization system has a great potential for application in a semi-continuous process for the production of FFase, but further studies are necessary to maintain the FFase transfructosylation activity at high levels during the overall process.
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Filamentous fungi for production of food additives and processing aids. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2008. [PMID: 18253709 DOI: 10.1007/10_2007_094] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
Filamentous fungi are metabolically versatile organisms with a very wide distribution in nature. They exist in association with other species, e.g. as lichens or mycorrhiza, as pathogens of animals and plants or as free-living species. Many are regarded as nature's primary degraders because they secrete a wide variety of hydrolytic enzymes that degrade waste organic materials. Many species produce secondary metabolites such as polyketides or peptides and an increasing range of fungal species is exploited commercially as sources of enzymes and metabolites for food or pharmaceutical applications. The recent availability of fungal genome sequences has provided a major opportunity to explore and further exploit fungi as sources of enzymes and metabolites. In this review chapter we focus on the use of fungi in the production of food additives but take a largely pre-genomic, albeit a mainly molecular, view of the topic.
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Vaidya BK, Singhal RS. Use of insoluble yeast β-glucan as a support for immobilization of Candida rugosa lipase. Colloids Surf B Biointerfaces 2008; 61:101-5. [PMID: 17681766 DOI: 10.1016/j.colsurfb.2007.06.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2007] [Revised: 05/23/2007] [Indexed: 11/21/2022]
Abstract
In the present study, insoluble yeast beta-glucan (IYG) has been explored as a support matrix for enzyme immobilization. IYG contains mainly beta-(1-3) linkages along with some intra- or inter-molecular branches of beta-(1-6) linkages with large number of free hydroxyl groups. Epichlorohydrin was used to convert these free hydroxyl groups into activated epoxy groups that are capable of forming covalent linkages with various groups of enzyme molecule. The epoxy-activated IYG was evaluated for immobilization of Candida rugosa lipase (CRL). Post-immobilization treatment of 5% glutaraldehyde was given in order to achieve stable and irreversible binding of enzyme on the support. The resultant biocatalytic IYG support expressed lipase activity of 8136.7 U/g and 59.6% activity yield. There was 51.05% retention of synthetic activity after six repeated esterification cycles, indicating its stability and reusability in non-aqueous medium. Moreover, the immobilized lipase gave the storage half-life of about 285 days (at 4 degrees C).
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Affiliation(s)
- Bhalchandra K Vaidya
- Food Engineering and Technology Department, Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai, India.
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23
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. JZ, . GS. Potential of Developed Microbial Biofilms in Generating Bioactive Compounds. ACTA ACUST UNITED AC 2007. [DOI: 10.3923/jm.2007.397.401] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mayani M, Mohanty B, Singh RP. A multikinetic model approach to predict gluconic acid production in an airlift bioreactor. Biotechnol J 2007; 2:631-9. [PMID: 17345577 DOI: 10.1002/biot.200600212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper uses a multikinetic approach to predict gluconic acid (GA) production performance in a 4.5 L airlift bioreactor (ALBR). The mathematical model consists of a set of simultaneous firstorder ordinary differential equations obtained from material balances of cell biomass, GA, glucose, and dissolved oxygen. Multikinetic models, namely, logistic and contois equations constitute kinetic part of the main model. The main model also takes into account the hydrodynamic and mass transfer parameters. These equations were solved using ODE solver of MATLAB v6.5 software. The mathematical model was validated with the experimental data available in the literature and is used to predict the effect of change in initial biomass and air sparging rate on the GA production. It is concluded that the mathematical model incorporated with multikinetic approach would be more efficient to predict the change in operating parameters on overall bioprocess of GA production in an ALBR.
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Affiliation(s)
- Mukesh Mayani
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Uttaranchal, Roorkee, India.
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Hadas Y, Goldberg I, Pines O, Prusky D. Involvement of Gluconic Acid and Glucose Oxidase in the Pathogenicity of Penicillium expansum in Apples. PHYTOPATHOLOGY 2007; 97:384-90. [PMID: 18943660 DOI: 10.1094/phyto-97-3-0384] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
ABSTRACT The contribution of gluconic acid secretion to the colonization of apple tissue by Penicillium expansum was analyzed by modulation (increase or decrease) of gluconic acid accumulation at the infection court. P. expansum isolates that express the most gox2 transcripts and concomitant glucose oxidase (GOX) activity and that secrete the most gluconic acid cause disease of apple at the fastest rate. Cultures grown under reduced oxygen concentration generated fewer gox2 transcripts, produced less gluconic acid, and led to a 15% reduction in disease. Furthermore, the detection of significantly high levels of transcripts of gox2 and GOX activity at the edge of the decaying tissue emphasize the involvement of GOX in tissue acidification of the decaying tissue. Taken together, these results emphasize the importance of GOX in the production of the gluconic acid that leads, in turn, to host tissue acidification. This acidification enhanced the expression of pectolytic enzymes and the establishment of conditions for necrotrophic development of P. expansum.
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Singh OV, Kumar R. Biotechnological production of gluconic acid: future implications. Appl Microbiol Biotechnol 2007; 75:713-22. [PMID: 17525864 DOI: 10.1007/s00253-007-0851-x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Revised: 01/16/2007] [Accepted: 01/21/2007] [Indexed: 10/23/2022]
Abstract
Gluconic acid (GA) is a multifunctional carbonic acid regarded as a bulk chemical in the food, feed, beverage, textile, pharmaceutical, and construction industries. The favored production process is submerged fermentation by Aspergillus niger utilizing glucose as a major carbohydrate source, which accompanied product yield of 98%. However, use of GA and its derivatives is currently restricted because of high prices: about US$ 1.20-8.50/kg. Advancements in biotechnology such as screening of microorganisms, immobilization techniques, and modifications in fermentation process for continuous fermentation, including genetic engineering programmes, could lead to cost-effective production of GA. Among alternative carbohydrate sources, sugarcane molasses, grape must show highest GA yield of 95.8%, and banana must may assist reducing the overall cost of GA production. These methodologies would open new markets and increase applications of GA.
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Affiliation(s)
- Om V Singh
- Department of Pediatrics, The Johns Hopkins School of Medicine, 600 N. Wolfe St., CMSC, 3-106, Baltimore, MD 21287, USA.
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Anastassiadis S, Rehm HJ. Continuous gluconic acid production by the yeast-like Aureobasidium pullulans in a cascading operation of two bioreactors. Appl Microbiol Biotechnol 2006; 73:541-8. [PMID: 16906404 DOI: 10.1007/s00253-006-0499-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2005] [Revised: 05/11/2006] [Accepted: 05/14/2006] [Indexed: 11/30/2022]
Abstract
The application of a new developed process for the continuous production of gluconic acid using a cascade of two bioreactors in a continuous process is shown reaching the highest concentration of gluconic acid described in the literature for continuous culture fermentation. Very high gluconic acid concentrations of 272-308 g/l have been achieved under continuous cultivation of free-growing cells of Aureobasidium pullulans in the first bioreactor at residence times (RT) between 19.5 and 24 h with formation rates for the generic product between 12.7 and 13.9 g/(l h). Gluconic acid, 350-370 g/l, was continuously reached in the second bioreactor at a total RT of 30.8-37 h with R (j) of 9.2-12 g/(l h). The highest specific gluconic acid production (m (p)) of 3.6 g/(g h) was found in the first bioreactor at the lowest RT of 19.5 h. The highest selectivity of 93.6% was determined in the first bioreactor as well. Complete glucose consumption was obtained at 37 h total residence time in the second bioreactor. Gluconic acid, 433 g/l, was continuously produced in the second bioreactor at a total RT of 37 h.
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Affiliation(s)
- Savas Anastassiadis
- Department of Environmental Engineering, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece.
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28
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Influence of alcohols on citric acid production by Aspergillus niger A-9 entrapped in polyacrylamide gels. J FOOD ENG 2005. [DOI: 10.1016/j.jfoodeng.2004.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Physiological aspects of free and immobilized Aspergillus niger cultures producing citric acid under various glucose concentrations. Process Biochem 2004. [DOI: 10.1016/j.procbio.2003.09.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Znad H, Markoš J, Baleš V. Production of gluconic acid from glucose by Aspergillus niger: growth and non-growth conditions. Process Biochem 2004. [DOI: 10.1016/s0032-9592(03)00270-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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