scholarly journals Optimization of alkali-thermostable and cellulase-free eylanase production from Bacillus Sp.

2012 ◽  
Vol 19 ◽  
pp. 7-14
Author(s):  
SCD Sharma ◽  
MS Shovon ◽  
AKM Asaduzzaman ◽  
MG Sarowar Jahan ◽  
T Yeasmin ◽  
...  
Keyword(s):  
Wheat Bran ◽  
Agar Medium ◽  
Xylanase Activity ◽  
Effect Of Temperature ◽  
Bacillus Sp ◽  
Dilution Technique ◽  
Isolation And Identification ◽  
Xylanase Production ◽  
Optimization Of Process Parameters ◽  
Bacterium Bacillus

Context: To analyze the nutritional and physicochemical parameters for the production of alkali-thermostable and cellulase free xylanase from bacteria. Objectives: The aim of this study was to isolation and identification and of alkali-thermostable and cellulase free xylanase producing bacteria from soil as well as optimization of process parameters for xylanase production. Materials and Methods: The bacterium Bacillus sp. was isolated from soil by serial dilution technique on xylan agar medium and identified by morphological and biochemical studies. The production of xylanase was carried out on xylan broth medium and xylanase activity was assayed by dinitrosalicylic acid (DNS) method. The effect of cultural parameters on the production of xylanase was determined by measuring the activity of xylanase. The effect of temperature and pH on the activity of partially purified xylanase as well as substrate specificity of xylanase were examined. Results: The maximum xylanase production (4000 U/L) by a Bacillus sp. was attained when the medium containing 0.5% wheat bran xylan and peptone at pH 8.0 and 50-55°C within 48-60 h. The partially purified xylanase was optimally active at pH 9.0 and 55°C. The xylanase showed high substrate activity towards wheat bran xylan but no activity towards cellulose, carboxymethyl cellulose and starch. Thus the enzyme was alkali-thermostable and cellulase free xylanase. Conclusion: The results obtained in this study suggest that the Bacillus sp. used is highly potential and useful for the production of cellulase free xylanase. DOI: http://dx.doi.org/10.3329/jbs.v19i0.12994 J. bio-sci. 19: 7-14, 2011

scholarly journals The optimal of xylanase production conditions using empty fruit bunch raw biomass by marine bacterium Bacillus sp LBF-001

2016 ◽  
Vol 11 (3) ◽  
Author(s):  
Hans Wijaya ◽  
Ahmad Thontowi ◽  
Nanik Rahmani ◽  
Yopi Yopi
Keyword(s):  
16S Rdna ◽  
Marine Bacterium ◽  
Xylanase Activity ◽  
Empty Fruit Bunch ◽  
Bacillus Sp ◽  
Marine Microorganisms ◽  
16S Rdna Gene ◽  
Xylanase Production ◽  
Rdna Gene ◽  
Bacterium Bacillus

Several xylanases have been studied recently, but few xylanases are from marine microorganisms have been reported. Marine bacterium Bacillus sp. LBF-001 was isolated from Pari Island Kepulauan Seribu in Indonesia. The purposes of this study are to identify of 16S rDNA gene from marine bacterium LBF-001 and to optimize medium conditions including kind and concentration of biomass, nitrogen source, pH and temperature. With 16S rDNA gene analysis that LBF-001 isolate have 99% identity with Bacillus pumilus HT-Z4-B2  (KJ526885). Fermentation for producing xylanases was done by using several agricultural residues under solid-state fermentation (SSF). The optimum condition for xylanase production by isolate Bacillus sp. LBF-001 are 2.5% empty fruit bunch, 0.6% lactose broth, pH values was 6.5, temperature condition was 30oC, under submerged fermentation with shaking at 150 rpm for 48 hours fermentation and giving the xylanase activity 10.85 U/mL.

scholarly journals Production and Partial Characterization of an Alkaline Xylanase from a Novel FungusCladosporium oxysporum

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Guo-Qiang Guan ◽  
Peng-Xiang Zhao ◽  
Jin Zhao ◽  
Mei-Juan Wang ◽  
Shu-Hao Huo ◽  
...  
Keyword(s):  
Nitrogen Source ◽  
Wheat Bran ◽  
Internal Transcribed Spacer ◽  
Gene Sequence ◽  
Agricultural Waste ◽  
Xylanase Activity ◽  
Maximum Activity ◽  
Alkaline Proteases ◽  
Xylanase Production

A new fungusCladosporium oxysporumGQ-3 producing extracellular xylanase was isolated from decaying agricultural waste and identified based on the morphology and comparison of internal transcribed spacer (ITS) rDNA gene sequence.C. oxysporumproduced maximum xylanase activity of 55.92 U/mL with wheat bran as a substrate and NH4Cl as a nitrogen source. Mg2+improvedC. oxysporumxylanase production.Partially purified xylanase exhibited maximum activity at 50°C and pH 8.0, respectively, and showed the stable activity after 2-h treatment in pH 7.0–8.5 or below 55°C. Mg2+enhanced the xylanase activity by 2% while Cu2+had the highest inhibition ratio of 57.9%. Furthermore,C. oxysporumxylanase was resistant to most of tested neutral and alkaline proteases. Our findings indicated thatCladosporium oxysporumGQ-3 was a novel xylanase producer, which could be used in the textile processes or paper/feed industries.

scholarly journals Using Lignosellulose Waste as a Xylanase Production Media of Mold Isolated from Rice Straw of Coastal-field

2018 ◽  
Vol 19 (2) ◽  
pp. 117
Author(s):  
Esti Utarti ◽  
S. Siswanto
Keyword(s):  
Quantitative Analysis ◽  
Rice Straw ◽  
Wheat Bran ◽  
Enzyme Activities ◽  
Activity Index ◽  
Xylanase Activity ◽  
Basic Salt ◽  
Xylanase Production ◽  
Aspergillus Foetidus ◽  
Oat Spelt

Hemicellulose is one of lignocellulose waste component, so that xylanase is one of importance enzyme of lignocellulose waste biodegradation. Molds as main decomposer lignosellulose waste has enzyme activities higher than yeast and bacteria. The aim of the research is to find mold that have xylanolitic activity using lignocellulose waste as media production. The research consist of isolations and screening mols from coastal-field of watu Ulo Jember, xylanase production using lignocellulose waste and idntification of mold which has the highes xylanase activity. A total of 66 molds isolated from rice straw in coastal-field of Watu Ulo Jember. There were screened for their xylanase activity. In semiquantitatively screen on Oat Spelt Xylan plate, the result showed that 62 have xilanolytic activities. Based on clearing zone production, isolates ESW A1 (3.2), ESW A5 (3.1), ESW C 16 (3.26), ESW D4 (3.0) and ESW D15 (3.21) have xilanase activity index higher than others. Furthermore, quantitative analysis using wheat bran, rice straw and baggase in basic salt Mandel’s modification media showed that xylanase activity of isolate ESW D4 was higher on rice straw 3% as substrate production with activity 2.66 U/mL. Isolate ESW D4 identified as Aspergillus foetidus so that called as Aspergillus foetidus ESW D4. Keywords: rice straw, coastal-field, Aspergillus foetidus ESW-D

Characterization of cellulase-free xylanases from the newly isolated Bacillus sp. strain BP-23

1993 ◽  
Vol 39 (12) ◽  
pp. 1162-1166 ◽  
Author(s):  
A. Blanco ◽  
F. I. J. Pastor
Keyword(s):  
Polyacrylamide Gel Electrophoresis ◽  
Xylanase Activity ◽  
Hydrolytic Activity ◽  
Bacillus Sp ◽  
Birchwood Xylan ◽  
Xylanase Production ◽  
Ph Values ◽  
Wide Range ◽  
Molecular Masses

A Bacillus strain with xylanase activity has been isolated. Maximum xylanase production was obtained when the strain was cultured in media supplemented with birchwood xylan or rice straw; production was repressed by glucose and xylose. The optimal temperature and pH for xylanase activity were 45–50 °C and 5.5–7.5, respectively. Crude xylanase was highly stable at a wide range of pH values, retaining 100% of the activity after 24 h of incubation at 37 °C in buffer at pH 10.0. Analysis by polyacrylamide gel electrophoresis and zymogram techniques showed four xylanase activity bands with apparent molecular masses of 32, 48, 61, and 66 kDa. The most active of them (molecular mass 32 kDa) apparently corresponded to a xylanase with an isoelectric point (pI) of 9.3 in isoelectrofocusing gels developed as zymograms. Four other bands with xylanase activity were detected at pIs of 7.7, 5.6, 5.0, and 4.5. Analysis for carboxymethylcellulase activity revealed that only the band of 48 kDa and the band with a pI of 7.7 showed hydrolytic activity against the cellulosic substrate.Key words: Bacillus sp., xylanase, isolation.

scholarly journals Conversion of Wheat Bran to Xylanases and Dye Adsorbent by Streptomyces thermocarboxydus

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 287
Author(s):  
Thi Ngoc Tran ◽  
Chien Thang Doan ◽  
San-Lang Wang
Keyword(s):  
Wheat Bran ◽  
Radical Scavenging Activity ◽  
Low Cost ◽  
Xylanase Activity ◽  
Radical Scavenging ◽  
Culture Conditions ◽  
Major Product ◽  
Growth Effect ◽  
Xylanase Production ◽  
Initial Ph

Agro-byproducts can be utilized as effective and low-cost nutrient sources for microbial fermentation to produce a variety of usable products. In this study, wheat bran powder (WBP) was found to be the most effective carbon source for xylanase production by Streptomyces thermocarboxydus TKU045. The optimal media for xylanase production was 2% (w/v) WBP, 1.50% (w/v) KNO3, 0.05% (w/v) MgSO4, and 0.10% (w/v) K2HPO4, and the optimal culture conditions were 50 mL (in a 250 mL-volume Erlenmeyer flask), initial pH 9.0, 37 °C, 125 rpm, and 48 h. Accordingly, the highest xylanase activity was 6.393 ± 0.130 U/mL, 6.9-fold higher than that from un-optimized conditions. S. thermocarboxydus TKU045 secreted at least four xylanases with the molecular weights of >180, 36, 29, and 27 kDa when cultured on the WBP-containing medium. The enzyme cocktail produced by S. thermocarboxydus TKU045 was optimally active over a broad range of temperature and pH (40–70 °C and pH 5–8, respectively) and could hydrolyze birchwood xylan to produce xylobiose as the major product. The obtained xylose oligosaccharide (XOS) were investigated for 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and the growth effect of lactic acid bacteria. Finally, the solid waste from the WBP fermentation using S. thermocarboxydus TKU045 revealed the high adsorption of Congo red, Red 7, and Methyl blue. Thus, S. thermocarboxydus TKU045 could be a potential strain to utilize wheat bran to produce xylanases for XOS preparation and dye adsorbent.

scholarly journals OPTIMASI MEDIA PRODUKSI ENZIM XILANASE DARI Bacillus sp. (Medium Optimization of Xylanase Production from Bacillus sp.)

2016 ◽  
Vol 6 (01) ◽  
Author(s):  
Erika Erika ◽  
Rochmah Agustrina ◽  
Sumardi Sumardi ◽  
Mulyono Mulyono
Keyword(s):  
Carbon Source ◽  
Ammonium Chloride ◽  
Medium Optimization ◽  
Incubation Temperature ◽  
Culture Media ◽  
Agricultural Waste ◽  
Xylanase Activity ◽  
Bacillus Sp ◽  
Production Time ◽  
Xylanase Production

Xylan is a carbon source in growth medium of extracellular xylanase producing bacteria. The purpose of this study was to get the optimum medium for the growth of Bacillus sp. in producing the xylanase. The factors consist of production time, carbon, and nitrogen source, as well as simple sugars. Addition carbon source used was delignified sugarcane bagasse, rice hulls, and corn cobs with different concentrations (0.25%; 0.5%; 0.75%; and 1% w/v) . Ammonium chloride, ammonium sulfate, and sodium nitrate with different concentrations (0.08%; 0.17%; 0.26%; and 0.35% w/v) were used as a source of nitrogen, while the simple sugar used was glucose, lactose, sucrose, and xylose. The results showed that the optimum culture media of Bacillus sp. to produce xylanase is media with 0.25% natural starch from the corn cob xylan as a carbon source, 0.26% ammonium chloride as a source of nitrogen, 0.0625 grams of sugar xylose, at pH 6, incubation temperature of 40°C, and 12 hours production time. In that media, xylanase activity was 0.2 U/mL.Keywords: agricultural waste, medium optimization, xylanase, Bacillus sp.   ABSTRAKXilan merupakan sumber karbon pada media pertumbuhan bakteri penghasil enzim ekstraseluler xilanase. Tujuan penelitian ini adalah mendapatkan media optimum untuk pertumbuhan Bacillus sp. dalam memproduksi xilanase. Perlakuan percobaan terdiri dari waktu produksi, sumber karbon, sumber nitrogen, dan penambahan gula sederhana. Sumber karbon yang digunakan adalah bagas tebu, sekam padi, dan tongkol jagung dengan variasi konsentrasi 0,25%; 0,5%; 0,75%; dan 1% (b/v) . Amonium klorida, amonium sulfat, dan natrium nitrat dengan variasi konsentrasi 0,08%; 0,17%; 0,26%; dan 0,35% (b/v) digunakan sebagai sumber nitrogen, sedangkan gula sederhana yang digunakan adalah glukosa, laktosa, sukrosa, dan xilosa masing-masing sebanyak 0,0625 b/v. Hasil percobaan menunjukkan bahwa media optimum pertumbuhan Bacillus sp. untuk produksi xilanase adalah media dengan 0,25% tepung xilan dari tongkol jagung sebagai sumber karbon, 0,26% amonium klorida sebagai sumber nitrogen, 0,0625 gram gula xilosa, pada pH media 6, suhu inkubasi 40°C, serta waktu produksi 12 jam. Dalam media tersebut, aktivitas xilanase yang dihasilkan sebesar 0,2 U/mL.Kata kunci : limbah pertanian, optimasi media, xilanase, Bacillus sp. 

scholarly journals Optimization of Conditions for Xylanase Production Using Aspergillus tubingensis Under Different Carbon Sources

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Isiaka Kolade ◽  
Kamoldeen Ajijolakewu
Keyword(s):  
Solid State ◽  
Incubation Period ◽  
Rice Husk ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Carbon Sources ◽  
Xylanase Activity ◽  
Aspergillus Tubingensis ◽  
Xylanase Production ◽  
Corn Cobs

Xylanases are hydrolytic enzymes with wide range of applications in food processing, bleaching of pulp in paper manufacturing industry, bio-conversion of biomass wastes to fermentable sugars and enhancing nutrient digestibility in animal feeds. The optimization of growth conditions and evaluation of an appropriate substrate as carbon source among cassava peels, corn cobs, wheat bran and rice husk on xylanase production by novel strain of Aspergillus tubingensis under Solid State Fermentation (SSF) was investigated. The fungal isolate was identified based on ribosomal RNA gene and ITS gene sequencing analysis as Aspergillus tubingensis. Results showed that Corn cobs had the highest xylanase production among the four substrates. Corn cobs recorded the highest value of xylanase production at pH of 6.0 (107.97 U/g), after incubation period of 72 hour (111.23 U/g), at temperature of 30oC (44.26 U/g) and at ratio 1:3 (45.68 U/g). The optimum growth conditions for xylanase production by Aspergillus tubingensis were: pH 6.0, incubation period of 72 hours, temperature of 30oC and substrate concentration of 1:3 (4g of substrate per 12ml of fermentation medium). Corn cobs showed the highest yield of xylanase activity (111.23±0.31 U/g), followed by Rice husk (101.91±0.72 U/g), Wheat bran (89.30±1.16 U/g) and Cassava peel (87.03±0.57 U/g). In conclusion, among the various agro residues that were used as carbon sources, Corn cobs had maximum xylanase activity. Various culture conditions were optimized by using one factor at a time method and the maximum xylanase production was obtained at pH of 6.0, incubation period of 72 hour, temperature of 30oC and substrate concentration of 1:3 under solid state fermentation. It is therefore suggested that some other notable environmental and fermentation factors that influence metabolism-mediated production yields of xylanase like aeration, agitation, carbon and nitrogen sources, metal ion requirement,  inoculum size etc. should be optimized for maximum production of enzyme.   Keywords: Solid State Fermentation, Cassava peels, Corn cobs, Wheat bran, Rice husk

scholarly journals Produk Urikase dari Bacillus sp. Kontaminan Laboratorium

2015 ◽  
Vol 1 (2) ◽  
pp. 96
Author(s):  
Leka Lutpiatina
Keyword(s):  
Uric Acid ◽  
Agar Medium ◽  
Airborne Bacteria ◽  
Bacillus Sp ◽  
Clear Zone ◽  
Biochemical Tests ◽  
Department Of Health ◽  
Nutrient Agar Medium ◽  
Bacterium Bacillus ◽  
Descriptive Survey

Urease is an enzyme catalyst in the reaction of oxidation of uric acid into Allantoin. Oxidation of uric acid by the enzyme has become a basic principle of measurement of uric acid levels in the human body. This research to know urikase derived from the bacterium Bacillus sp that contaminate the air Laboratory of Microbiology Department of Health Analyst Banjarmasin. The research is descriptive survey. Airborne bacteria were isolated and identified for Bacillus sp. The identification is done by examination of macroscopic, microscopic and biochemical tests subsequently performed tests using nutrient agar medium containing 0.2% of uric acid. Results of the study showed there were two isolates of Bacillus sp and obtained clear zone on both these isolates. Conclusions of research there are contaminants Bacillus sp. as much as 40% in the laboratory. 100% of the yield urikase Bacillus sp. Urikase advice from Bacillus sp can be used as an alternative reagent uric acid probes spectophotometric method.

scholarly journals Extracellular Xylanase Production by Fusarium Species in Solid State Fermentation

2011 ◽  
Vol 60 (3) ◽  
pp. 209-212 ◽  
Author(s):  
MOHAMMED IMAD EDDIN ARABI ◽  
YASSER BAKRI ◽  
MOHAMMED JAWHAR
Keyword(s):  
Solid State ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Fusarium Solani ◽  
Fusarium Species ◽  
Fusarium Culmorum ◽  
Xylanase Activity ◽  
Xylanase Production ◽  
Enhanced Production ◽  
Fusarium Sp

Fusarium sp. has been shown to be a promising organism for enhanced production of xylanases. In the present study, xylanase production by 21 Fusarium sp. isolates (8 Fusarium culmorum, 4 Fusarium solani, 6 Fusarium verticillioides and 3 Fusarium equiseti) was evaluated under solid state fermentation (SSF). The fungal isolate Fusarium solani SYRN7 was the best xylanase producer among the tested isolates. The effects of some agriculture wastes (like wheat straw, wheat bran, beet pulp and cotton seed cake) and incubation period on xylanase production by F. solani were optimized. High xylanase production (1465.8 U/g) was observed in wheat bran after 96 h of incubation. Optimum pH and temperature for xylanase activity were found to be 5 and 50 degrees C, respectively.

scholarly journals BIOMASSES AND XYLANASE PRODUCTION BY STRAINS OF PENICILLIUM ISOLATED FROM BRAZILIAN ATLANTIC FOREST

2009 ◽  
Vol 76 (3) ◽  
pp. 359-364
Author(s):  
S.M. Tauk-Tornisiel ◽  
M.C. Vallejo ◽  
J.C. Govone
Keyword(s):  
Carbon Source ◽  
Wheat Bran ◽  
Tap Water ◽  
Carbon Sources ◽  
Xylanase Activity ◽  
Nitrogen Sources ◽  
Solid Substrate ◽  
Xylanase Production ◽  
Activity Maximum ◽  
Different Temperatures

ABSTRACT Six Penicillium strains were isolated from soil at a depth of 0 15 cm in the Juréia-Itatins Ecology Station (JIES), in the São Paulo State, Brazil. They were evaluated for xylanase production under different temperatures and carbon sources. The best carbon source and temperature were first determined in an automated Bioscreen C system, verifying the growth of microorganisms. Liquid media containing tap water with 2% carbohydrate and/or 1% nitrogen sources were used. Afterwards, Penicillium citrinum, P. fellutanum, P. rugulosum and P. decumbens were cultivated in 250 mL Erlenmeyer flasks with 50 mL of culture medium containing tap water sole 2% carbon source (fructose, glucose, mannitol, sucrose or xylose) and 1% yeast extract as a nitrogen source at pH 5.0 and 28o C, with agitation of 150 rpm for 72 hours. These same strains, except P. decumbens, and P. purpurogenum were cultivated in solid substrate with wheat bran under the same environmental conditions to study the potential of xylanase activity. Maximum xylanase activity was observed in cultures with wheat bran, without the addition of any other carbon source, using inocula containing 1 x 107 spores.mL-1 (28o C, pH 5.0, 72 h). It can be concluded that P. fellutanum and P. citrinumare a good xylanase producers under the conditions of 28º C. The results of xylanase activity were 54% less at 28º C in liquid cultures media cultures than in solid substrate.

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