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Amorim C, Silvério SC, Prather KL, Rodrigues LR. From lignocellulosic residues to market: Production and commercial potential of xylooligosaccharides. Biotechnol Adv 2019; 37:107397. [DOI: 10.1016/j.biotechadv.2019.05.003] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 04/07/2019] [Accepted: 05/04/2019] [Indexed: 12/25/2022]
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Anthony P, Harish B, Jampala P, Ramanujam S, Uppuluri KB. Statistical optimization, purification and applications of xylanase produced from mixed bacteria in a solid liquid fermentation using Prosopis juliflora. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2016. [DOI: 10.1016/j.bcab.2016.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fedorenko V, Genilloud O, Horbal L, Marcone GL, Marinelli F, Paitan Y, Ron EZ. Antibacterial Discovery and Development: From Gene to Product and Back. BIOMED RESEARCH INTERNATIONAL 2015; 2015:591349. [PMID: 26339625 PMCID: PMC4538407 DOI: 10.1155/2015/591349] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/30/2014] [Accepted: 01/13/2015] [Indexed: 12/23/2022]
Abstract
Concern over the reports of antibiotic-resistant bacterial infections in hospitals and in the community has been publicized in the media, accompanied by comments on the risk that we may soon run out of antibiotics as a way to control infectious disease. Infections caused by Enterococcus faecium, Staphylococcus aureus, Klebsiella species, Clostridium difficile, Acinetobacter baumannii, Pseudomonas aeruginosa, Escherichia coli, and other Enterobacteriaceae species represent a major public health burden. Despite the pharmaceutical sector's lack of interest in the topic in the last decade, microbial natural products continue to represent one of the most interesting sources for discovering and developing novel antibacterials. Research in microbial natural product screening and development is currently benefiting from progress that has been made in other related fields (microbial ecology, analytical chemistry, genomics, molecular biology, and synthetic biology). In this paper, we review how novel and classical approaches can be integrated in the current processes for microbial product screening, fermentation, and strain improvement.
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Affiliation(s)
- Victor Fedorenko
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv 79005, Ukraine
| | - Olga Genilloud
- Fundación MEDINA, Health Sciences Technology Park, 18016 Granada, Spain
| | - Liliya Horbal
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv 79005, Ukraine
| | - Giorgia Letizia Marcone
- Department of Biotechnology and Life Sciences, University of Insubria, 21100 Varese, Italy
- The Protein Factory, Interuniversity Centre Politecnico di Milano, ICRM CNR Milano, and University of Insubria, 21100 Varese, Italy
| | - Flavia Marinelli
- Department of Biotechnology and Life Sciences, University of Insubria, 21100 Varese, Italy
- The Protein Factory, Interuniversity Centre Politecnico di Milano, ICRM CNR Milano, and University of Insubria, 21100 Varese, Italy
| | - Yossi Paitan
- Clinical Microbiology Laboratory, Meir Medical Center, 44281 Kfar Saba, Israel
| | - Eliora Z. Ron
- Department of Molecular Microbiology and Biotechnology, Tel Aviv University, 6997801 Tel Aviv, Israel
- Galilee Research Institute (MIGAL), 11016 Kiryat Shmona, Israel
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Xu K, Xu P. Betaine and beet molasses enhance L-lactic acid production by Bacillus coagulans. PLoS One 2014; 9:e100731. [PMID: 24956474 PMCID: PMC4067348 DOI: 10.1371/journal.pone.0100731] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 05/29/2014] [Indexed: 11/17/2022] Open
Abstract
Lactic acid is an important chemical with various industrial applications, and it can be efficiently produced by fermentation, in which Bacillus coagulans strains present excellent performance. Betaine can promote lactic acid fermentation as an effective osmoprotectant. Here, positive effect of betaine on fermentation by B. coagulans is revealed. Betaine could enhance lactic acid production by protecting l-LDH activity and cell growth from osmotic inhibition, especially under high glucose concentrations and with poor organic nitrogen nutrients. The fermentation with 0.05 g/L betaine could produce 17.9% more lactic acid compared to the fermentation without betaine. Beet molasses, which is rich in sucrose and betaine, was utilized in a co-feeding fermentation and raised the productivity by 22%. The efficient lactic acid fermentation by B. coagulans is thus developed by using betaine and beet molasses.
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Affiliation(s)
- Ke Xu
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Ping Xu
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
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Luo H, Zhang J, Yuan G, Zhao Y, Liu H, He Z, Shi Z. Performance improvement of cephalosporin C fermentation by Acremonium chrysogenum with DO-Stat based strategy of co-feeding soybean oil and glucose. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.09.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Experimental improvement of preparation of acrylic acid-modified middle deacetylated chitosan and its application in absorbing paraquat. POLYM ENG SCI 2012. [DOI: 10.1002/pen.23281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Li J, Yang Y, Chu J, Huang M, Li L, Zhang X, Wang Y, Zhuang Y, Zhang S. Quantitative metabolic flux analysis revealed uneconomical utilization of ATP and NADPH in Acremonium chrysogenum fed with soybean oil. Bioprocess Biosyst Eng 2010; 33:1119-29. [PMID: 20571830 DOI: 10.1007/s00449-010-0439-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Accepted: 05/20/2010] [Indexed: 11/26/2022]
Abstract
A metabolic network was constructed for the Acremonium chrysogenum cultivation fed with soybean oil. Metabolic flux analysis indicated that the shift from exponential growth to rapid cephalosporin C (CPC) formation was accompanied by 1.63- and 5-fold carbon flux enlargement in TCA cycle and glyoxylate by-pass, respectively. The flux via pentose phosphate pathway branch was little affected during the rapid CPC formation period; the contributory explanation was that 35.6% of NADPH was consumed in the dissimilation of fatty acids. Estimation of NADPH, ATP generation, and consumption demonstrated that, with soybean oil as carbon source in rapid CPC formation phase, the NADPH consumed in fatty acid catabolism was fourfold greater than that used in the CPC biosynthesis-relevant part; simultaneously, more than 90% energy spent was not directly related to the CPC formation. Therefore, the improvement of CPC production yield through optimization of the NADPH, ATP generation, and consumption was put forward.
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Affiliation(s)
- Jianhua Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, People's Republic of China
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Shin HY, Lee JY, Jung YR, Kim SW. Stimulation of cephalosporin C production in Acremonium chrysogenum M35 by glycerol. BIORESOURCE TECHNOLOGY 2010; 101:4549-4553. [PMID: 20171092 DOI: 10.1016/j.biortech.2010.01.095] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Revised: 01/14/2010] [Accepted: 01/21/2010] [Indexed: 05/28/2023]
Abstract
In this study, the effects of glycerol on cephalosporin C production by Acremonium chrysogenum M35 were evaluated. The addition of glycerol increased cephalosporin production by up to 12-fold. Glycerol caused the upregulation of the transcription of the isopenicillin synthase (pcbC) and transporter (cefT) genes in early exponential phase, and affected the cell morphology since hyphal fragments differentiated into arthrospores. These results indicate that glycerol effectively enhances cephalosporin C production via stimulation of cell differentiation.
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Affiliation(s)
- Hyun Yong Shin
- Department of Chemical Biological Engineering, Korea University, 1-5Ka, Anam-Dong, Sungbuk-Ku, Seoul 136-701, Republic of Korea
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Edwinoliver NG, Thirunavukarasu K, Purushothaman S, Rose C, Gowthaman MK, Kamini NR. Corn steep liquor as a nutrition adjunct for the production of Aspergillus niger lipase and hydrolysis of oils thereof. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:10658-10663. [PMID: 19860451 DOI: 10.1021/jf902726p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Corn steep liquor (CSL) has been used as a nutrition adjunct for the production of an extracellular lipase from Aspergillus niger, which has immense importance as an additive in laundry detergent formulations. A five-level four-factorial central composite design was chosen to determine the optimal medium components with four critical variables, namely, CSL, NH4H2PO4, Na2HPO4, and sesame oil, that were found to be influential for lipase production by the classical one-factor-at-a-time method. The model suggested that all of the factors chosen had a significant impact on lipase production, and the optimum values of the influential parameters were CSL, 2.0%, w/v; NH4H2PO4, 0.05%, w/v; Na2HPO4, 0.75%, w/v; and sesame oil, 2.0%, w/v, with an activity of 26.7 U/mL at 48 h and 30 degrees C, which was 2.16-fold higher than the initial activity (12 U/mL) obtained by the conventional one-factor-at-a-time method. Furthermore, the enzyme has good potential for the hydrolysis of vegetable oils and fish oils, and a hydrolytic ratio of 88.73% was obtained with palm oil at 48 h. The utilization of CSL and sesame oil for lipase production from A. niger makes the process green, because both are renewable substrates and economically viable at an industrial scale.
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Affiliation(s)
- N G Edwinoliver
- Department of Biotechnology, Central Leather Research Institute, Adyar, Chennai 600 020, India
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Hsu ST, Chen LC, Lee CC, Pan TC, You BX, Yan QF. Preparation of methacrylic acid-modified rice husk improved by an experimental design and application for paraquat adsorption. JOURNAL OF HAZARDOUS MATERIALS 2009; 171:465-470. [PMID: 19616888 DOI: 10.1016/j.jhazmat.2009.06.144] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 06/04/2009] [Accepted: 06/06/2009] [Indexed: 05/28/2023]
Abstract
Methacrylic acid (MAA) grafted rice husk was synthesized using graft copolymerization with Fenton's reagent as the redox initiator and applied to the adsorption of paraquat. The highest grafting percentage of 44.3% was obtained using the traditional kinetic method. However, a maximum grafting percentage of 65.3% was calculated using the central composite design. Experimental results based on the recipes predicted from the statistical analysis are consistent with theoretical calculations. A representative polymethacrylic acid-g-rice husk (PMAA-g-rice husk) copolymer was hydrolyzed to a salt type and applied to the adsorption of paraquat. The adsorption equilibrium data correlate more closely with the Langmuir isotherm than with the Freundlich equation. The maximum adsorption capacity of modified rice husk is 292.5mg/g-adsorbent. This value exceeds those for Fuller's earth and activated carbon, which are the most common binding agents used for paraquat. The samples at various stages were characterized by solid-state (13)C NMR spectroscopy.
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Affiliation(s)
- Shih-Tong Hsu
- Department of Polymer Materials, Kun Shan University, No. 949 Da-Wan Rd., Yung-Kang City, Tainan Hsien, Taiwan, ROC.
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Guo WQ, Ren NQ, Wang XJ, Xiang WS, Ding J, You Y, Liu BF. Optimization of culture conditions for hydrogen production by Ethanoligenens harbinense B49 using response surface methodology. BIORESOURCE TECHNOLOGY 2009; 100:1192-1196. [PMID: 18793840 DOI: 10.1016/j.biortech.2008.07.070] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2008] [Revised: 07/28/2008] [Accepted: 07/28/2008] [Indexed: 05/26/2023]
Abstract
The design of an optimum and cost-efficient medium for high-level production of hydrogen by Ethanoligenens harbinense B49 was attempted by using response surface methodology (RSM). Based on the Plackett-Burman design, Fe(2+) and Mg(2+) were selected as the most critical nutrient salts. Subsequently, the optimum combination of the selected factors and the sole carbon source glucose were investigated by the Box-Behnken design. Results showed that the maximum hydrogen yield of 2.21 mol/mol glucose was predicted when the concentrations of glucose, Fe(2+) and Mg(2+) were 14.57 g/L, 177.28 mg/L and 691.98 mg/L, respectively. The results were further verified by triplicate experiments. The batch reactors were operated under an optimized condition of the respective glucose, Fe(2+) and Mg(2+) concentration of 14.5 g/L, 180 mg/L and 690 mg/L, the initial pH of 6.0 and experimental temperature of 35+/-1(o)C. Without further pH adjustment, the maximum hydrogen yield of 2.20 mol/mol glucose was obtained based on the optimized medium with further verified the practicability of this optimum strategy.
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Affiliation(s)
- Wan-Qian Guo
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, PR China
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Ren J, Lin WT, Shen YJ, Wang JF, Luo XC, Xie MQ. Optimization of fermentation media for nitrite oxidizing bacteria using sequential statistical design. BIORESOURCE TECHNOLOGY 2008; 99:7923-7927. [PMID: 18440806 DOI: 10.1016/j.biortech.2008.03.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Revised: 03/04/2008] [Accepted: 03/04/2008] [Indexed: 05/26/2023]
Abstract
The sequential statistical experimental design (Plackett-Burman, factorial, response surface and steepest ascent experiment) was applied to optimize the culture medium of nitrite oxidizing bacteria for improving the nitrite oxidizing rate. Estimated optimum medium composition of the nitrite oxidizing rate was as follows: NaHCO3, 1.86gl(-1); NaNO2, 2.04gl(-1); Na2CO3, 0.2gl(-1); NaCl, 0.2gl(-1); KH2PO4, 0.1gl(-1); MgSO4 x7H2O, 0.1gl(-1); and FeSO4 x 7H2O, 0.01gl(-1). The nitrite oxidizing rate was increased by 48.0% and reached a maximum at 859.5+/-8.4mgNO2-N/gMLSS.d as compared to 580.7+/-25.8mgNO2-N/gMLSS x d. In the field trial, 50L of nitrite oxidizing bacteria concentrate (1.99gVSS/L) with 850mgNO2-N/gMLSS x d were added to 0.6ha of the aquaculture water. Nitrite level in all treated ponds remained very low compared to the steady increase observed in all of the control ponds during 7 days.
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Affiliation(s)
- Jie Ren
- College of Biological Science and Engineering, South China University of Technology, Guangzhou 510006, PR China
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. NY, . DRK, . VP, . NKK, . DSRR. Optimization of Pectinase Production from Manihot utilissima by Aspergillus niger NCIM 548 Using Statistical Experimental Design. ACTA ACUST UNITED AC 2008. [DOI: 10.3923/jm.2008.9.16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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