scholarly journals Solid State Fermentation of a Raw Starch Digesting Alkaline Alpha-Amylase from Bacillus licheniformis RT7PE1 and Its Characteristics

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Romana Tabassum ◽  
Shazia Khaliq ◽  
Muhammad Ibrahim Rajoka ◽  
Foster Agblevor
Keyword(s):  
Molecular Weight ◽  
Solid State ◽  
Bacillus Licheniformis ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Half Life ◽  
Alpha Amylase ◽  
Kinetic Properties ◽  
Optimum Temperature ◽  
Raw Starch

The thermodynamic and kinetic properties of solids state raw starch digesting alpha amylase from newly isolated Bacillus licheniformis RT7PE1 strain were studied. The kinetic values Qp, Yp/s, Yp/X, and qp were proved to be best with 15% wheat bran. The molecular weight of purified enzyme was 112 kDa. The apparent Km and Vmax values for starch were 3.4 mg mL−1 and 19.5 IU mg−1 protein, respectively. The optimum temperature and pH for α-amylase were 55°C, 9.8. The half-life of enzyme at 95°C was 17h. The activation and denaturation activation energies were 45.2 and 41.2 kJ mol−1, respectively. Both enthalpies (ΔH∗) and entropies of activation (ΔS∗) for denaturation of α-amylase were lower than those reported for other thermostable α-amylases.

scholarly journals Partial purification and properties of cellulase-free alkaline xylanase produced by Rhizopus stolonifer in solid-state fermentation

2005 ◽  
Vol 48 (3) ◽  
pp. 327-333 ◽  
Author(s):  
Antonio José Goulart ◽  
Eleonora Cano Carmona ◽  
Rubens Monti
Keyword(s):  
Solid State ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Partial Purification ◽  
Optimum Temperature ◽  
Rhizopus Stolonifer ◽  
Purification And Properties ◽  
Exclusion Chromatography ◽  
Molecular Exclusion Chromatography

Rhizopus stolonifer was cultivated in wheat bran to produce a cellulase-free alkaline xylanase. The purified enzyme obtained after molecular exclusion chromatography in Sephacryl S-200 HR showed optimum temperature as 45º C and hydrolysis pHs optima as pH 6.0 and 9.0. Xylanase presented higher Vmax at pH 9.0 (0.87 µmol/mg protein) than at pH 6.0 and minor Km at pH 6.0 (7.42 mg/mL) than at pH 9.0.

scholarly journals Optimization of extraction parameters for recovery of alpha-amylase from the fermented bran of Bacillus circulans GRS313

2001 ◽  
Vol 44 (1) ◽  
pp. 107-111 ◽  
Author(s):  
Soumen Palit ◽  
Rintu Banerjee
Keyword(s):  
Enzyme Activity ◽  
Solid State ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Alpha Amylase ◽  
Bacillus Circulans ◽  
Optimum Conditions ◽  
Soaking Time ◽  
Maximum Extraction ◽  
Extraction Parameters

The extraction of alpha-amylase in the solid state fermentation of wheat bran by Bacillus circulans GRS313 was optimized. Among various solvents tested, maximum extraction was achieved when 2.5% (v/v) glycerol was added. The optimum conditions for extraction were 2.5 hrs soaking time at 30° C under recirculation and agitated condition, which yielded 590 U/g bran of enzyme activity. Whereas under stationary soaking condition the activity of the enzyme was 439.58U/g bran. With repeated wash under the above optimum conditions showed that 600 U/g and 184.2 U/g of enzyme extracted in the 1st and 2nd washes respectively and only 36.84 U/g was recovered in the 3rd wash

scholarly journals Production of Glucoamylase, α-amylase and Cellulase by Aspergillus oryzae F-923 Cultivated on Wheat Bran under Solid State Fermentation

2020 ◽  
pp. 8-22
Author(s):  
M. Fadel ◽  
Sawsan AbdEl-Halim ◽  
Hayat Sharada ◽  
Ahmed Yehia ◽  
Mayar Ammar
Keyword(s):  
Solid State ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Tap Water ◽  
Cellulase Activity ◽  
Fermentation Medium ◽  
Industrial Applications ◽  
Partial Purification ◽  
Physical Parameters ◽  
Optimum Temperature

Filamentous fungi have been widely utilized in production of enzymes which have many industrial applications. In this study, twenty five local fungal isolates, belonging to Aspergillus sp., Trichoderma sp. and Penicillium sp., were screened under solid state fermentation conditions (SSF) for the production of α-amylase, glucoamylase and cellulase. Asperigillus oryzae F-923, cultivated on wheat bran, was the most promising isolate for production of the target enzymes under this study. Physical parameters of moisture content, pH, temperature and incubation time, optimized were 1:2(w/v), 5.5, 28°C and 72 hr, respectively. The production of enzymes was enhanced when ammonium sulfate was supplemented as a nitrogen source to wheat bran. The production of α-amylase and glucoamylase was also enhanced when 10% (w/w) soluble starch was added as a carbon source to wheat bran. However xylose supplementation at 10% (w/w) was observed to be best for cellulase production. Tap water was found to be efficient for enzymes' extraction from the fermentation medium. Three successive extractions were needed to obtain the produced enzymes from the fermented substrate. Characterization of the produced enzymes revealed that, the optimum temperature for α-amylase and glucoamylase was 60°C, while 50°C was the optimum temperature for cellulase activity. Isopropanol 1:1(v/v) was proved to be more suitable for partial purification of enzymes. Following partial purification of enzymes of glucoamylase, α-amylase and cellulase increased to 10.8, 11.8 and 11.4 folds, respectively.

Upgrading of valuable food component contents and anti-nutritional factors depletion by solid-state fermentation: A way to valorize wheat bran for nutrition

2020 ◽  
pp. 103159
Author(s):  
Sonja Jakovetić Tanasković ◽  
Nataša Šekuljica ◽  
Jelena Jovanović ◽  
Ivana Gazikalović ◽  
Sanja Grbavčić ◽  
...  
Keyword(s):  
Solid State ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Food Component ◽  
Nutritional Factors

scholarly journals Comparative Evaluation of Agroindustrial Byproducts for the Production of Alkaline Protease by Wild and Mutant Strains ofBacillus subtilisin Submerged and Solid State Fermentation

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Hamid Mukhtar ◽  
Ikramul Haq
Keyword(s):  
Bacillus Subtilis ◽  
Solid State ◽  
Wheat Bran ◽  
Solid State Fermentation ◽  
Soybean Meal ◽  
Alkaline Protease ◽  
Enzyme Production ◽  
Enhanced Production ◽  
Industrial Byproducts ◽  
Agroindustrial Byproducts

The present study describes the screening of different agroindustrial byproducts for enhanced production of alkaline protease by a wild and EMS induced mutant strain ofBacillus subtilisIH-72EMS8. During submerged fermentation, different agro-industrial byproducts were tested which include defatted seed meals of rape, guar, sunflower, gluten, cotton, soybean, and gram. In addition to these meals, rice bran, wheat bran, and wheat flour were also evaluated for protease production. Of all the byproducts tested, soybean meal at a concentration of 20 g/L gave maximum production of the enzyme, that is, 5.74  ±  0.26 U/mL from wild and 11.28  ±  0.45 U/mL from mutant strain, during submerged fermentation. Different mesh sizes (coarse, medium, and fine) of the soybean meal were also evaluated, and a finely ground soybean meal (fine mesh) was found to be the best. In addition to the defatted seed meals, their alkali extracts were also tested for the production of alkaline protease byBacillus subtilis, but these were proved nonsignificant for enhanced production of the enzyme. The production of the enzyme was also studied in solid state fermentation, and different agro-industrial byproducts were also evaluated for enzyme production. Wheat bran partially replaced with guar meal was found as the best substrate for maximum enzyme production under solid state fermentation conditions.

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