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Bangoria P, Divecha J, Shah AR. Production of mannooligosaccharides producing β-Mannanase by newly isolated Penicillium aculeatum APS1 using oil seed residues under solid state fermentation. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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2
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Alokika, Singh B. Production, characteristics, and biotechnological applications of microbial xylanases. Appl Microbiol Biotechnol 2019; 103:8763-8784. [PMID: 31641815 DOI: 10.1007/s00253-019-10108-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 08/09/2019] [Accepted: 08/28/2019] [Indexed: 01/29/2023]
Abstract
Microbial xylanases have gathered great attention due to their biotechnological potential at industrial scale for many processes. A variety of lignocellulosic materials, such as sugarcane bagasse, rice straw, rice bran, wheat straw, wheat bran, corn cob, and ragi bran, are used for xylanase production which also solved the great issue of solid waste management. Both solid-state and submerged fermentation have been used for xylanase production controlled by various physical and nutritional parameters. Majority of xylanases have optimum pH in the range of 4.0-9.0 with optimum temperature at 30-60 °C. For biochemical, molecular studies and also for successful application in industries, purification and characterization of xylanase have been carried out using various appropriate techniques. Cloning and genetic engineering are used for commercial-level production of xylanase, to meet specific economic viability and industrial needs. Microbial xylanases are used in various biotechnological applications like biofuel production, pulp and paper industry, baking and brewing industry, food and feed industry, and deinking of waste paper. This review describes production, characteristics, and biotechnological applications of microbial xylanases.
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Affiliation(s)
- Alokika
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, 124001, India
| | - Bijender Singh
- Laboratory of Bioprocess Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, 124001, India. .,Department of Biotechnology, School of Interdisciplinary and Applied Life Sciences, Central University of Haryana, Jant-Pali, Mahendergarh, Haryana, 123031, India.
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Production and characterization of a novel acidophilic and thermostable xylanase from Thermoascus aurantiacu. Int J Biol Macromol 2018; 109:1270-1279. [DOI: 10.1016/j.ijbiomac.2017.11.130] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 11/16/2017] [Accepted: 11/20/2017] [Indexed: 01/24/2023]
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4
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Contreras-Hernández MG, Ochoa-Martínez LA, Rutiaga-Quiñones JG, Rocha-Guzmán NE, Lara-Ceniceros TE, Contreras-Esquivel JC, Prado Barragán LA, Rutiaga-Quiñones OM. Effect of ultrasound pre-treatment on the physicochemical composition of Agave durangensis leaves and potential enzyme production. BIORESOURCE TECHNOLOGY 2018; 249:439-446. [PMID: 29065326 DOI: 10.1016/j.biortech.2017.10.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 06/07/2023]
Abstract
Approximately 1 million tons of agave plants are processed annually by the Mexican tequila and mezcal industry, generating vast amounts of agroindustrial solid waste. This type of lignocellulosic biomass is considered to be agroindustrial residue, which can be used to produce enzymes, giving it added value. However, the structure of lignocellulosic biomass makes it highly recalcitrant, and results in relatively low yield when used in its native form. The aim of this study was to investigate an effective pre-treatment method for the production of commercially important hydrolytic enzymes. In this work, the physical and chemical modification of Agave durangensis leaves was analysed using ultrasound and high temperature as pre-treatments, and production of enzymes was evaluated. The pre-treatments resulted in modification of the lignocellulosic structure and composition; the ultrasound pre-treatment improved the production of inulinase by 4 U/mg and cellulase by 0.297 U/mg, and thermal pre-treatment improved β-fructofuranosidase by 30 U/mg.
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Affiliation(s)
- M G Contreras-Hernández
- Tecnológico Nacional de México, Instituto Tecnológico de Durango, Departamento de Ingenierías Química y Bioquímica, Felipe Pescador 1803 Ote, Colonia Nueva Vizcaya, Durango, Dgo C.P. 34080, Mexico
| | - L A Ochoa-Martínez
- Tecnológico Nacional de México, Instituto Tecnológico de Durango, Departamento de Ingenierías Química y Bioquímica, Felipe Pescador 1803 Ote, Colonia Nueva Vizcaya, Durango, Dgo C.P. 34080, Mexico
| | - J G Rutiaga-Quiñones
- Facultad de Ingeniería en Tecnología de la Madera (FITECMA), Edificio D, CU, Universidad Michoacana de San Nicolás de Hidalgo (UMSNH), Av. Fco. J. Mújica S/N. Col Felicitas de Río, Morelia, Michoacán C.P. 58040, Mexico
| | - N E Rocha-Guzmán
- Tecnológico Nacional de México, Instituto Tecnológico de Durango, Departamento de Ingenierías Química y Bioquímica, Felipe Pescador 1803 Ote, Colonia Nueva Vizcaya, Durango, Dgo C.P. 34080, Mexico
| | - T E Lara-Ceniceros
- Centro de Investigación en Materiales Avanzados S. C. (CIMAV-Unidad Monterrey), Grupo de Materiales Funcionales y Nanotecnología, Alianza Norte 202, Autopista Monterrey-Aeropuerto km 10, Apodaca, Nuevo León C.P. 66628, Mexico
| | - J C Contreras-Esquivel
- Departamento de Investigación de Alimentos, Facultad de Química, Universidad Autónoma de Coahuila, Blvd. V. Carranza e Ing. José Cárdenas V. S/N. Col. República Ote, Saltillo, Coahuila C.P. 25280, Mexico
| | - L A Prado Barragán
- Departamento de Biotecnología, Universidad Autónoma Metropolitana, PA 55-535, Iztapalapa, C.P. 09340 CDMX, Mexico
| | - O M Rutiaga-Quiñones
- Tecnológico Nacional de México, Instituto Tecnológico de Durango, Departamento de Ingenierías Química y Bioquímica, Felipe Pescador 1803 Ote, Colonia Nueva Vizcaya, Durango, Dgo C.P. 34080, Mexico.
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van Nierop SNE, Cameron-Clarke A, Axcell BC. Enzymatic Generation of Factors from Malt Responsible for Premature Yeast Flocculation. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2018. [DOI: 10.1094/asbcj-62-0108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Pisa JH, Manfredi AP, Perotti NI, Romero HG, Breccia JD, Martínez MA. Agrowastes as Feedstock for the Production of Endo-β-Xylanase from Cohnella sp. Strain AR92. J Mol Microbiol Biotechnol 2017; 27:277-288. [DOI: 10.1159/000480541] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 08/17/2017] [Indexed: 11/19/2022] Open
Abstract
Members of <i>Cohnella </i>sp. isolated from a variety of environments have been shown to be glycoside hydrolase producers. Nevertheless, most evaluations of members of this genus are limited to their taxonomic description. The strain AR92, previously identified as belonging to the genus <i>Cohnella</i>, formed a well-supported cluster with <i>C. thailandensis</i> and <i>C. formosensis</i> (>80% bootstrap confidence). Its growth and xylanase production were approached by using a mineral-based medium containing alkali-pretreated sugarcane bagasse as the main carbon source, which was assayed as a convenient source to produce biocatalysts potentially fitting its degradation. By means of a two-step statistical approach, the production of endoxylanase was moderately improved (20%). However, a far more significant improvement was observed (145%), by increasing the inoculum size and lowering the fermentation temperature to 25°C, which is below the optimal growth temperature of the strain AR92 (37°C). The xylanolytic preparation produced by <i>Cohnella</i> sp. AR92 contained mild temperature-active endoxylanase (identified as redundant GH10 family) for the main activity which resulted in xylobiose and xylo-oligosaccharides as the main products from birchwood xylan.
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Optimization of lipase production by solid-state fermentation of olive pomace: from flask to laboratory-scale packed-bed bioreactor. Bioprocess Biosyst Eng 2017; 40:1123-1132. [DOI: 10.1007/s00449-017-1774-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 04/26/2017] [Indexed: 10/19/2022]
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Leite P, Salgado JM, Venâncio A, Domínguez JM, Belo I. Ultrasounds pretreatment of olive pomace to improve xylanase and cellulase production by solid-state fermentation. BIORESOURCE TECHNOLOGY 2016; 214:737-746. [PMID: 27209456 DOI: 10.1016/j.biortech.2016.05.028] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/09/2016] [Accepted: 05/10/2016] [Indexed: 06/05/2023]
Abstract
Olive mills generate a large amount of waste that can be revaluated. This work aim to improve the production lignocellulolytic enzymes by solid-state fermentation using ultrasounds pretreated olive mill wastes. The composition of olive mill wastes (crude and exhausted olive pomace) was compared and several physicochemical characteristics were significantly different. The use of both wastes in SSF was evaluated and a screening of fungi for xylanase and cellulase production was carried out. After screening, the use of exhausted olive pomace and Aspergillus niger led to the highest enzyme activities, so that they were used in the study of ultrasounds pre-treatment. The results showed that the sonication led to a 3-fold increase of xylanase activity and a decrease of cellulase activity. Moreover, the liquid fraction obtained from ultrasounds treatment was used to adjust the moisture of solid and a positive effect on xylanase (3.6-fold increase) and cellulase (1.2-fold increase) production was obtained.
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Affiliation(s)
- Paulina Leite
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - José Manuel Salgado
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Armando Venâncio
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - José Manuel Domínguez
- Department of Chemical Engineering, Sciences Faculty, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, Spain
| | - Isabel Belo
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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Kaushal R, Sharma N, Dogra V. Optimization of the production and molecular characterization of cellulase-free xylanase from an alkalophillic Bacillus subtilis SD8 isolated from paper mill effluent. APPL BIOCHEM MICRO+ 2015. [DOI: 10.1134/s0003683815050117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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TRFLP analysis reveals that fungi rather than bacteria are associated with premature yeast flocculation in brewing. J Ind Microbiol Biotechnol 2012; 39:1821-32. [DOI: 10.1007/s10295-012-1188-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 08/10/2012] [Indexed: 10/27/2022]
Abstract
Abstract
Premature yeast flocculation (PYF) is a sporadic fermentation problem in the brewing industry that results in incomplete yeast utilization of fermentable sugars in wort. Culture-independent, PCR-based fingerprinting techniques were applied in this study to identify the associations between the occurrence of the PYF problem during brewery fermentation with barley malt-associated microbial communities (both bacteria and fungi). Striking differences in the microbial DNA fingerprint patterns for fungi between PYF positive (PYF +ve) and negative (PYF −ve) barley malts were observed using the terminal restriction fragment length polymorphism (TRFLP) technique. The presence of terminal restriction fragments (TRFs) of 360–460 bp size range, for fungal HaeIII restriction enzyme-derived TRFLP profiles appeared to vary substantially between PYF +ve and PYF −ve samples. The source of the barley malt did not influence the fungal taxa implicated in PYF. TRFLP analysis indicates bacterial taxa are unlikely to be important in causing PYF. Virtual digestion of fungal sequences tentatively linked HaeIII TRFs in the 360–460 bp size range to a diverse range of yeast/yeast-like species. Findings from this study suggest that direct monitoring of barley malt samples using molecular methods could potentially be an efficient and viable alternative for monitoring PYF during brewery fermentations.
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Cui F, Zhao L. Optimization of Xylanase production from Penicillium sp.WX-Z1 by a two-step statistical strategy: Plackett-Burman and Box-Behnken experimental design. Int J Mol Sci 2012; 13:10630-10646. [PMID: 22949884 PMCID: PMC3431882 DOI: 10.3390/ijms130810630] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/23/2012] [Accepted: 08/02/2012] [Indexed: 02/07/2023] Open
Abstract
The objective of the study was to optimize the nutrition sources in a culture medium for the production of xylanase from Penicillium sp.WX-Z1 using Plackett-Burman design and Box-Behnken design. The Plackett-Burman multifactorial design was first employed to screen the important nutrient sources in the medium for xylanase production by Penicillium sp.WX-Z1 and subsequent use of the response surface methodology (RSM) was further optimized for xylanase production by Box-Behnken design. The important nutrient sources in the culture medium, identified by the initial screening method of Placket-Burman, were wheat bran, yeast extract, NaNO(3), MgSO(4), and CaCl(2). The optimal amounts (in g/L) for maximum production of xylanase were: wheat bran, 32.8; yeast extract, 1.02; NaNO(3), 12.71; MgSO(4), 0.96; and CaCl(2), 1.04. Using this statistical experimental design, the xylanase production under optimal condition reached 46.50 U/mL and an increase in xylanase activity of 1.34-fold was obtained compared with the original medium for fermentation carried out in a 30-L bioreactor.
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Affiliation(s)
- Fengjie Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; E-Mail:
| | - Liming Zhao
- Department of Respiratory Disease, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai 200003, China
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Kumar A, Gupta R, Shrivastava B, Khasa YP, Kuhad RC. Xylanase production from an alkalophilic actinomycete isolate Streptomyces sp. RCK-2010, its characterization and application in saccharification of second generation biomass. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2011.10.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Production of xylanase under solid-state fermentation by Aspergillus tubingensis JP-1 and its application. Bioprocess Biosyst Eng 2012; 35:769-79. [PMID: 22271252 DOI: 10.1007/s00449-011-0657-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Accepted: 11/12/2011] [Indexed: 10/14/2022]
Abstract
The production of extracellular xylanase by a locally isolated strain of Aspergillus tubingensis JP-1 was studied under solid-state fermentation. Among the various agro residues used wheat straw was found to be the best for high yield of xylanase with poor cellulase production. The influence of various parameters such as initial pH, moisture, moistening agents, nitrogen sources, additives, surfactants and pretreatment of substrates were investigated. The production of the xylanase reached a peak in 8 days using untreated wheat straw with modified MS medium, pH 6.0 at 1:5 moisture level at 30 °C. Under optimized conditions yield as high as 6,887 ± 16 U/g of untreated wheat straw was achieved. Crude xylanase was used for enzymatic saccharification of agro-residues like wheat straw, rice bran, wheat bran, sugarcane bagasse and industrial paper pulp. Dilute alkali (1 N NaOH) and acid (1 N H(2)SO(4)) pretreatment were found to be beneficial for the efficient enzymatic hydrolysis of wheat straw. Dilute alkali and acid-pretreated wheat straw yielded 688 and 543 mg/g reducing sugar, respectively. Yield of 726 mg/g reducing sugar was obtained from paper pulp after 48 h of incubation.
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Facchini FDA, Vici AC, Reis VRA, Jorge JA, Terenzi HF, Reis RA, Polizeli MDLTDM. Production of fibrolytic enzymes by Aspergillus japonicus C03 using agro-industrial residues with potential application as additives in animal feed. Bioprocess Biosyst Eng 2010; 34:347-55. [PMID: 21046416 DOI: 10.1007/s00449-010-0477-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Accepted: 10/15/2010] [Indexed: 11/26/2022]
Abstract
Solid-state fermentation obtained from different and low-cost carbon sources was evaluated to endocellulases and endoxylanases production by Aspergillus japonicus C03. Regarding the enzymatic production the highest levels were observed at 30 °C, using soy bran added to crushed corncob or wheat bran added to sugarcane bagasse, humidified with salt solutions, and incubated for 3 days (xylanase) or 6 days (cellulase) with 70% relative humidity. Peptone improved the xylanase and cellulase activities in 12 and 29%, respectively. The optimum temperature corresponded to 60 °C and 50-55 °C for xylanase and cellulase, respectively, both having 4.0 as optimum pH. Xylanase was fully stable up to 40 °C, which is close to the rumen temperature. The enzymes were stable in pH 4.0-7.0. Cu++ and Mn++ increased xylanase and cellulase activities by 10 and 64%, respectively. A. japonicus C03 xylanase was greatly stable in goat rumen fluid for 4 h during in vivo and in vitro experiments.
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Affiliation(s)
- Fernanda Dell Antonio Facchini
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
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Sanghvi GV, Koyani RD, Rajput KS. Thermostable xylanase production and partial purification by solid-state fermentation using agricultural waste wheat straw. Mycology 2010. [DOI: 10.1080/21501203.2010.484029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Parachin NS, Siqueira S, de Faria FP, Torres FAG, de Moraes LMP. Xylanases from Cryptococcus flavus isolate I-11: Enzymatic profile, isolation and heterologous expression of CfXYN1 in Saccharomyces cerevisiae. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.12.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Bakri Y, Jawhar M, Arabi MIE. Improvement of xylanase production by Cochliobolus sativus in solid state fermentation. Braz J Microbiol 2008; 39:602-4. [PMID: 24031273 PMCID: PMC3768414 DOI: 10.1590/s1517-838220080003000036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Revised: 10/04/2007] [Accepted: 07/14/2008] [Indexed: 11/21/2022] Open
Abstract
The xylanase production by Cochliobolus sativus strain Cs6 was improved under solid state fermentation (SSF). High xylanase activity (1079 U/g) was obtained when wheat straw was used after 8 days of incubation. Combinations of sodium nitrate with peptone or yeast extract resulted in an increased xylanase production (1543 and 1483 U/g, respectively). The Cs6 strain grown in SSF in a simple medium, proved to be a promising microorganism for xylanase production.
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Affiliation(s)
- Yasser Bakri
- Department of Molecular Biology and Biotechnology , AECS, Damascus , Syria
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Li Y, Liu Z, Cui F, Liu Z, Zhao H. Application of Plackett–Burman experimental design and Doehlert design to evaluate nutritional requirements for xylanase production by Alternaria mali ND-16. Appl Microbiol Biotechnol 2007; 77:285-91. [PMID: 17846761 DOI: 10.1007/s00253-007-1167-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 08/10/2007] [Accepted: 08/15/2007] [Indexed: 11/29/2022]
Abstract
The objective of this study was to use statistically based experimental designs for the optimization of xylanase production from Alternaria mali ND-16. Ten components in the medium were screened for nutritional requirements. Three nutritional components, including NH(4)Cl, urea, and MgSO(4), were identified to significantly affect the xylanase production by using the Plackett-Burman experimental design. These three major components were subsequently optimized using the Doehlert experimental design. By using response surface methodology and canonical analysis, the optimal concentrations for xylanase production were: NH(4)Cl 11.34 g L(-1), urea 1.26 g L(-1), and MgSO(4) 0.98 g L(-1). Under these optimal conditions, the xylanase activity from A. mali ND-16 reached 30.35 U mL(-1). Verification of the optimization showed that xylanase production of 31.26 U mL(-1) was achieved.
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Affiliation(s)
- Yin Li
- Department of Plant Science, North Dakota State University, Fargo, ND 58105, USA.
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Li Y, Liu Z, Cui F, Xu Y, Zhao H, Liu Z. Application of Statistical Experimental Design to Optimize Culture Requirements of Aspergillus sp. Zh-26 Producing Xylanase for Degradation of Arabinoxylans in Mashing. J Food Sci 2007; 72:E320-9. [DOI: 10.1111/j.1750-3841.2007.00389.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Li Y, Liu Z, Zhao H, Xu Y, Cui F. Statistical optimization of xylanase production from new isolated Penicillium oxalicum ZH-30 in submerged fermentation. Biochem Eng J 2007. [DOI: 10.1016/j.bej.2006.11.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yang SQ, Yan QJ, Jiang ZQ, Li LT, Tian HM, Wang YZ. High-level of xylanase production by the thermophilic Paecilomyces themophila J18 on wheat straw in solid-state fermentation. BIORESOURCE TECHNOLOGY 2006; 97:1794-800. [PMID: 16230011 DOI: 10.1016/j.biortech.2005.09.007] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Revised: 08/29/2005] [Accepted: 09/05/2005] [Indexed: 05/04/2023]
Abstract
The production of extracellular xylanase by a newly isolated thermophilic fungus, Paecilomyces themophila J18, on the lignocellulosic materials was studied in solid-state fermentation (SSF). The strain grew well at 50 degrees C and produced a high-level of xylanase activity using the selected lignocellulosic materials, especially wheat straw. Production of xylanase by P. themophila J18 on wheat straw was enhanced by optimizing the particle size of wheat straw, nitrogen source, initial moisture level, growth temperature and initial pH of the culture medium. Under the optimized conditions, yield as high as 18,580 Ug(-1) of carbon source of xylanase was achieved. No CMCase activity was observed. The xylanase exhibited remarkable stability and retained more than 50% of its original activity at 70 degrees C for 4h at pH 7.0-8.0. Therefore, P. themophila J18 could to be a promising microorganism for thermostable, cellulase-free xylanase production in SSF.
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Affiliation(s)
- S Q Yang
- Department of Biotechnology, College of Food Science and Nutritional Engineering, China Agricultural University, Haidian District, Beijing, China
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