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  • Articles  (19)
  • Aspergillus niger  (19)
  • Springer  (19)
  • National Academy of Sciences
  • 1995-1999  (19)
  • 1975-1979
  • Process Engineering, Biotechnology, Nutrition Technology  (19)
Collection
  • Articles  (19)
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Keywords
Publisher
Years
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Comparison of citric acid production byAspergillus niger immobilized in gels and cryogels of polyacrylamide (1996)
    Springer
    Journal of industrial microbiology and biotechnology 16 (1996), S. 351-353 
    Details
    ISSN: 1476-5535
    Keywords: citric acid ; Aspergillus niger ; immobilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Aspergillus niger was immobilized in cryogels and in conventional gels of polyacrylamide. The growth of cells entrapped in two kinds of gels and the production of citric acid by the immobilized cells were investigated and compared. Cells immobilized in cryogels were more suitable for citric acid production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570114
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  • 2
    Electronic Resource
    Electronic Resource
    Leaching of iron from kaolins by a spent fermentation liquor: Influence of temperature, pH, agitation and citric acid concentration (1995)
    Springer
    Journal of industrial microbiology and biotechnology 14 (1995), S. 288-292 
    Details
    ISSN: 1476-5535
    Keywords: Leaching ; Bleaching ; Kaolin ; Aspergillus niger
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The efficiency of a biological bleaching process on a highly contaminated iron oxides kaolin was analyzed. The bio-bleaching method consists of two steps: first, the fermentation of a chemically-defined medium byAspergillus niger leads to a spent liquor which, in a second step, is employed as leaching agent for kaolin. In the leaching process 43% of iron oxides was removed when the kaolin was treated at 60°C for 5 h and the whiteness index was increased to 67%. Extracellular enzymes were not responsible for leaching, which is basically due to organic acids produced during the fermentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01569941
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  • 3
    Electronic Resource
    Electronic Resource
    Optimization for xylanase and cellulase production from Aspergillus niger ATTC 6275 in palm oil mill wastes and its application (1997)
    Springer
    World journal of microbiology and biotechnology 13 (1997), S. 555-559 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; cellulase ; optimization ; palm oil wastes ; xylanase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Optimization of enzyme production from Aspergillus niger ATCC 6275 under both submerged and solid-substrate cultivation was investigated. Results from submerged cultivation using palm oil mill effluent revealed that pretreatment of ground palm cake did not improve enzyme production. Addition of 0.60g NH4NO3/l generated maximum activity of xylanase and cellulase (CMCase). The optimum aeration rate was 1.2 v/v min. Under solid-substrate cultivation, the results indicated that heating and alkali treatment of the ground palm cake gave no further improvement in enzyme production. The optimal N-source was 2% urea. Optimal initial moisture contents for xylanase and CMCase activities were 60% and 50% respectively, with temperature optima of 30°C and 35°C, respectively. The optimal inoculum size was 1× 108 spores/g palm cake with an initial pH of 4.5–5.0. The maximum activities of xylanase (282.9U/g) and CMCase (23.8U/g) were obtained under the optimum conditions. Solid-substrate cultivation was a better method for the production of enzyme, particularly xylanase, from A. niger ATCC 6275. The application of these enzymes to decanter effluent showed the separation of oil and grease and suspended solids from the effluent. This is comparable to the result achieved from using the commercial xylase preparation Meicelase and superior to the effect of Sumyzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018569426594
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  • 4
    Electronic Resource
    Electronic Resource
    Isolation, purification and properties of tannase from Aspergillus niger van Tieghem (1999)
    Springer
    World journal of microbiology and biotechnology 15 (1999), S. 673-677 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; detanninification ; properties ; tannase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Tannase (tannin acyl hydrolase E.C. 3.1.1.20) has been isolated from Aspergillus niger van Tieghem and purified 29-fold. The enzyme had a temperature optimum of 60 °C, pH optimum of 6.0 with a second peak at pH 4.5, Km of 0.20 mM and Vmax of 5.0 μmol min−1 mg−1protein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008939816281
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  • 5
    Electronic Resource
    Electronic Resource
    Solid-state fermentation of carob pods byAspergillus niger for protein production: effect of particle size (1995)
    Springer
    World journal of microbiology and biotechnology 11 (1995), S. 171-173 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; carob ; particle size ; single-cell protein ; solid-state fermentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Two strains ofAspergillus niger were cultured in solid-state fermentation system on carob pods ground from 1.25 to 8 mm diam. A particle size of 2.5 mm gave the highest protein content of the final product (20%, w/w) and 52% of the total soluble carbohydrates were utilized. The total tannin concentration of the carob pods decreased by 83% in 4 days of fermentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00704642
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  • 6
    Electronic Resource
    Electronic Resource
    Activity and thermostability of carboxymethylcellulase from Aspergillus niger is strongly influenced by noncovalently attached polysaccharides (1996)
    Springer
    World journal of microbiology and biotechnology 12 (1996), S. 213-216 
    Details
    ISSN: 1573-0972
    Keywords: Activity ; Aspergillus niger ; CMCase ; polysaccharides ; stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Removal of non-covalently attached polysaccharides from carboxymethylcellulase (CMCase) of Aspergillus niger improved its activity but decreased its thermostability and protease resistance. The activation energy profile of the hydrolysis of carboxymethylcellulose (CMC) was triphasic with increasing values of 17,-55 and-562 kJ/mol for polysaccharide-free and 19, -21 and -207 kJ/mol for polysaccharide-complexed CMCase. The specificity constant (Vmax/Km) of polysaccharide-free CMCase was 1.41 compared to polysaccharide-complexed CMCase which was only 0.68. The polysaccharide free CMCase had lower thermostability (‘melting point’ = 82°C) and higher protease susceptibility compared to polysaccharide-complexed CMCase (‘melting point’〉100°C).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00360917
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  • 7
    Electronic Resource
    Electronic Resource
    Production of pectinases by Aspergillus niger in solid state fermentation at high initial glucose concentrations (1996)
    Springer
    World journal of microbiology and biotechnology 12 (1996), S. 257-260 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; pectinase ; solid state fermentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Exopectinase (exo-p) and endopectinase (endo-p) production by Aspergillus niger CH4 in solid state culture was studied at initial glucose concentrations of 100, 250, 350 and 450 g/l. The highest activity of exo-p (35 U/g) was produced at 72 and 120 h in the medium containing 100 and 250 g glucose/l, respectively. The maximum endo-p activity (9 U/g) was produced at 72 h in the medium with 250 g glucose/l. The reduction in pectinase production at 350 and 450 g/l initial glucose concentration was due neither to repression of the synthesis of the enzyme nor to the glucose consumption rate of the strain but due to a drastic drop in pH of the medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00360924
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  • 8
    Electronic Resource
    Electronic Resource
    Production of amyloglucosidase by Aspergillus niger under different cultivation regimens (1996)
    Springer
    World journal of microbiology and biotechnology 12 (1996), S. 267-271 
    Details
    ISSN: 1573-0972
    Keywords: Amyloglucosidase ; aqueous two-phase system ; Aspergillus niger ; solid-state fermentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Amyloglucosidase (AMG) was produced by Aspergillus niger in solid-state fermentation (SSF), submerged fermentation (SmF) and an aqueous, two-phase system of polyethyleneglycol (PEG) and salt. In SSF, a fed-batch mode of operation gave a yield of 64 U/ml compared with 44 U/ml in batch mode. Similar trends were observed for SmF, where fed-batch cultivation gave a yield of 102 U/ml compared with 66 U/ml in batch. Shorter cultivation times (66 h) were required for SmF than for SSF (96 h). In the aqueous, two-phase cultivation, the productivity and yield of AMG were both twice those in the control fermentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00360926
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  • 9
    Electronic Resource
    Electronic Resource
    A rapid method for detecting fungi-toxic substances (1996)
    Springer
    World journal of microbiology and biotechnology 12 (1996), S. 301-302 
    Details
    ISSN: 1573-0972
    Keywords: Adenocalymma alliaceum ; Alternaria brassicae ; antifungal activity ; Aspergillus niger ; spore germination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A simple and rapid technique is reported for the preliminary screening of fungi-toxic extracts/samples by direct spotting onto silica gel plates and subsequent over-spraying with a fungal spore suspension. After incubation fungi-toxicity is indicated by a growth inhibition zone, the area of which is related to the concentration of the sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00360934
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  • 10
    Electronic Resource
    Electronic Resource
    Some properties of eucalyptus kraft pulp treated with xylanase from Aspergillus niger (1998)
    Springer
    World journal of microbiology and biotechnology 14 (1998), S. 365-367 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; biobleaching ; eucalyptus kraft pulp ; xylanase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract An Aspergillus niger isolate produced about 2500nkat xylanase/ml when cultivated in a medium containing 3% xylose. Application of the crude xylanolytic preparation to unbleached eucalyptus kraft pulp resulted in a decreased kappa number and increased brightness. Handsheets made from the xylanase-treated pulp after ECF bleaching retained good structural and mechanical characteristics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008861127351
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  • 11
    Electronic Resource
    Electronic Resource
    Short communication: Influence of inoculum preparation on citric acid production by Aspergillus niger (1996)
    Springer
    World journal of microbiology and biotechnology 12 (1996), S. 655-656 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; citric acid ; inoculum ; spore viability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The type of sporulation medium and time of incubation had an effect on spore viability and citric acid production by mycelia grown from Aspergillus niger spores. Shu & Johnson agar (SJA) and potato dextrose agar gave higher citric acid titres than malt-extract agar. SJA also gave better germinability than the other media. Viability increased with time of incubation, but higher production of citric acid was achieved with spores incubated for less than 7 days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327734
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  • 12
    Electronic Resource
    Electronic Resource
    Selection of a strain of Aspergillus for the production of citric acid from pineapple waste in solid-state fermentation (1998)
    Springer
    World journal of microbiology and biotechnology 14 (1998), S. 399-404 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; citric acid ; pineapple waste ; solid-state fermentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Aspergillus foetidus ACM 3996 (=FRR 3558) and three strains of Aspergillus niger ACM 4992 (=ATCC 9142), ACM 4993 (=ATCC 10577), ACM 4994 (=ATCC 12846) were compared for the production of citric acid from pineapple peel in solid-state fermentation. A. niger ACM 4992 produced the highest amount of citric acid, with a yield of 19.4g of citric acid per 100g of dry fermented pineapple waste under optimum conditions, representing a yield of 0.74g citric acid/g sugar consumed. Optimal conditions were 65% (w/w) initial moisture content, 3% (v/w) methanol, 30°C, an unadjusted initial pH of 3.4, a particle size of 2mm and 5ppm Fe2+. Citric acid production was best in flasks, with lower yields being obtained in tray and rotating drum bioreactors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008821413239
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  • 13
    Electronic Resource
    Electronic Resource
    Influence of calcium on fungal growth and citric acid production during fermentation of a sugarcane molasses-based medium by a strain of Aspergillus niger (1999)
    Springer
    World journal of microbiology and biotechnology 15 (1999), S. 647-649 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; calcium ; citric acid ; fungal morphology ; molasses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The effect of CaCl2 on the growth, morphology and citric acid production from sugarcane molasses by Aspergillus niger 419 was studied. The addition of 0.5g CaCl2/l to the fermentation medium induced a loose pelleted form of growth, reduced the biomass concentration and increased the volumetric productivity (g citric acid/h) and the specific production (g citric acid/g biomass dw) from 0.02 and 0.37 to 0.13 and 3.72, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008902724942
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  • 14
    Electronic Resource
    Electronic Resource
    The role of rock-phosphate-solubilizing fungi and vesicular–arbusular-mycorrhiza (VAM) in growth of wheat plants fertilized with rock phosphate (1997)
    Springer
    World journal of microbiology and biotechnology 14 (1997), S. 211-218 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; Glomus constrictum ; Penicillium citrinum ; rock phosphate solubilization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A total of 36 fungal species isolated from soil were tested for their ability to solubilize rock phosphate (RP) in agar plates. Most of these fungi were non-rock phosphate solubilizers, but two isolates, Aspergillus niger and Penicillium citrinum, had high activity. Liquid culture experiments revealed that both fungi caused a remarkable drop in pH of culture media and solubilized considerable amounts of phosphate. The effects on wheat of inoculation with vesicular–arbuscular mycorrhizal fungi and rock-phosphate-solubilizing fungi and fertilization with rock phosphate were studied in sterilized pot soils, nonsterilized pot trials and in field plot soils. Rock phosphate fertilization and inoculation with Glomus constrictum and rock-phosphate-solubilizing fungi (A. niger and P. citrinum) significantly increased dry matter yield of wheat plants under all experimental conditions. However, the effect was more evident in non- sterilized pot soils and in the field than in sterilized pots. Rock phosphate had no significant effect on the total phosphorus content of plants grown under pot conditions but it was significantly increased in field plots; the effect of inoculation with fungi (G. constrictum, A. niger and P. citrinum) on plant phosphorus was closely related to this in dry matter production. The greatest positive effect on growth and phosphorus contents of wheat plants was recorded in the treatments that received rock phosphate and were inoculated with a mixed inoculum of the three microorganisms used, followed by dual inoculation treatments of G. constrictum plus either A. niger or P. citrinum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008830129262
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  • 15
    Electronic Resource
    Electronic Resource
    Influence of the glycolytic rate on production of citric acid and oxalic acid by Aspergillus niger in solid state fermentation (1999)
    Springer
    World journal of microbiology and biotechnology 15 (1999), S. 493-495 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; citric acid ; glycolytic rate ; oxalic acid ; solid state fermentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A study was performed to understand the physiology and biochemical mechanism of citric acid accumulation during solid state fermentation of sweet potato using Aspergillus niger Yang No.2. A low citrate-producing mutant was isolated followed by a comparative study of the fermentation process and selected physiological and biochemical parameters. In contrast with the parent strain, the mutant strain displayed lower concentrations, yields and production rates of citric acid, accompanied by higher concentrations, yields and production rates of oxalic acid. In addition, the mutant utilized starch at a lower rate although higher concentrations of free glucose accumulated in the cultures. Biochemical analyses revealed lower rates of glucose uptake and hexokinase activity of the mutant strain in comparison with the parent strain. It is proposed that, in common with submerged fermentation, over-production of citric acid in solid state fermentation is related to an increased glucose flux through glycolysis. At low glucose fluxes, oxalic acid is accumulated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008993622446
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  • 16
    Electronic Resource
    Electronic Resource
    Rock phosphate solubilization by Aspergillus niger on olive cake-based medium and its further application in a soil–plant system (1997)
    Springer
    World journal of microbiology and biotechnology 14 (1997), S. 281-284 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; Glomus deserticola ; olive cake ; rock phosphate ; solubilization ; plant growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A citric acid-producing strain of Aspergillus niger, grown on olive cake-based medium, was able to solubilize rock phosphate. Solubilization of insoluble phosphate increased during the solid-state fermentation process, reaching a maximum of 164μg/ml. Various combinations of olive cake and rock phosphate, previously treated or untreated by the fungus, were introduced into a calcareous, phosphorus (P)-deficient soil to improve the growth of Trifolium repens in a greenhouse experiment. Synergistic action of both the filamentous and arbuscular fungi caused considerable improvement of growth and plant P uptake. Greater growth and P uptake of mycorrhizal and non-mycorrhizal plants were achieved when microbe-treated olive cake and rock phosphate were applied to soil compared with all other treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008858802855
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  • 17
    Electronic Resource
    Electronic Resource
    Influence of culture conditions on the formation of milk-clotting protease by Aspergillus niger MC4 (1997)
    Springer
    World journal of microbiology and biotechnology 14 (1997), S. 11-15 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; aspartic protease ; milk-clotting protease ; cheese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008808029745
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  • 18
    Electronic Resource
    Electronic Resource
    Gold and silver accumulation by Aspergillus niger from cyanide-containing solution obtained from the gold mining industry (1997)
    Springer
    World journal of microbiology and biotechnology 14 (1997), S. 149-149 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; cyanide ; cyano-metals ; heavy metals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract An Aspergillus niger strain accumulated gold and silver from solution containing high cyanide concentrations. Our results show that A. niger is of potential use for the removal of metals and/or the recovery of valuable metals from cyanide-containing solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008805423811
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  • 19
    Electronic Resource
    Electronic Resource
    Determination of the enzymatic activity of pectinases from different microorganisms (1995)
    Springer
    World journal of microbiology and biotechnology 11 (1995), S. 355-356 
    Details
    ISSN: 1573-0972
    Keywords: Aspergillus niger ; Aspergillus oryzae ; pectinase ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The decrease in viscosity is widely used to estimate the activity of pectinolytic enzymes. This method is shown to be influenced by the production strain and this prevents an accurate comparison between the activities of different microorganisms, especially under different conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00367120
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