Wyniki wyszukiwania - AGRO

1

Optimization of conditions for intracellular glucose oxidase extraction from Aspergillus niger mycelium

100%

Fiedurek J., Szczodrak J.

Bulletin of the Polish Academy of Sciences. Biological Sciences

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1994

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tom 42

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nr 2

2

Characteristics of cellulases synthesized by Aspergillus niger

100%

Hornecka D., Ilnicka-Olejniczak O., Komorowska-Rycerz A.

Applied Biology Communications. Lublin Scientific Center

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1994

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tom 04

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nr 1-2

3

Wpływ stężenia glukozy na syntezę kwasu szczawiowego przez Aspergillus niger

89%

Walaszczyk E., Dawidowicz K., Gasiorek E., Podgorski W.

Acta Scientiarum Polonorum. Biotechnologia

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2014

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tom 13

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nr 4

Celem pracy było zbadanie wpływu stężenia glukozy, jako jedynego źródła węgla, na tworzenie produktu w procesie syntezy kwasu szczawiowego przez Aspergillus niger we wgłębnej hodowli okresowej. Badania prowadzono w podłożach syntetycznych zawierających glukozę rozcieńczoną do poziomu 100, 125, 150 i 175 g·dm-3. Najwyższe stężenie produktu, wynoszące 64,2 g·dm-3, uzyskano w podłożu zawierającym glukozę w ilości 150 g·dm-3. W wariancie tym stwierdzono także obecność kwasów towarzyszących: cytrynowego w stężeniu 15,4 g·dm-3 i glukonowego w stężeniu 28,7 g·dm-3. Współczynnik homofermentatywności procesu wyniósł 59,2%. Najwyższą szybkość tworzenia produktu i najwyższą wydajność substratową, wynoszące odpowiednio 2,9 g·dm-3·d-1 i 61,6%, uzyskano w podłożu ze stężeniem substratu na poziomie 100 g·dm-3. Uznano, że optymalne stężenie glukozy w podłożu, ze względu na maksymalizację stężenia produktu, wynosi 150 g·dm-3.

4

Optimization of growth conditions for xylanase production by Aspergillus niger in solid state fermentation

88%

Kavya V., Padmavathi T.

Polish Journal of Microbiology

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2009

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tom 58

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nr 2

125-130

The objectives of the present study were isolation, identification and characterization of xylanase producing fungi, optimization of medium composition and cultural conditions for xylanase enzyme production using cheaper sources. The fungal strains were isolated from garden soil by serial dilution technique and Aspergillus niger was identified and isolated in pure form. In conformation screening by congo red test, based on the reddish zone of enzyme activity formation in oat spelt xylan agar plates, A. niger was selected and optimized for xylanase enzyme production in solid state fermentation using cheaper sources like wheat bran, rice bran, soya bran, ragi bran and saw dust. Maximum enzyme activity was observed in wheat bran (9.87 U/ml). The use of wheat bran as a major carbon source is particularly valuable because oat spelt xylan or birch wood xylan are more expensive. The effects of time course, incubation substrate, inoculum size, moisturizing agent, moisture content, temperature and volume of fermentation medium on the production of xylanase were studied. The maximum xylanase production (12.65 U/ml) was observed at optimized condition, incubation temperature of 28°C after 6 days of incubation period while minimum production (9.38 U/ml) at unoptimized condition. The maximum production of enzyme was found to be in wheat bran when the volume of fermentation medium was kept as 10 g/250 ml conical flasks, with mineral solution as moisturizing agent and moisture ratio 1:0.7. Thus the present study proved that the fungal strain A. niger used is highly potential and useful for xylanase production.

5

Inzynieryjne aspekty hodowli plesni A.niger w fermentorze wiezowym typu air-lift

88%

Gluszcz P., Jamroz T., Michalski H., Sencio B.

Biotechnologia

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1993

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nr 3

38-47

6

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Effect of sucrose concentration on oxalic acid biosynthesis by Aspergillus niger

88%

Walaszczyk E., Gasiorek E., Podgorski W.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2017

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tom 588

The aim of the work was to determine the influence of initial sucrose concentration in fermentation medium on oxalic acid synthesis by Aspergillus niger W78C in submerged batch culture. Cultivations were conducted in synthetic medium containing sucrose in the concentration of 100, 125, 150, 175 or 200 g·dm⁻³. As the result of the present investigation, the optimal sucrose concentration was found at the level of 125 g·dm⁻³. In medium containing this amount of carbon source, 70.2 g·dm⁻³ of oxalic acid was obtained. When substrate concentration was the highest, 200 g dm⁻³, the amount of product was only 5.2 g·dm⁻³ higher than in medium with 125 g·dm⁻³ of sucrose. Moreover, an increase of the initial sucrose concentration resulted in process time extension, an increase of citric and gluconic acids concentration and a decrease of productivity and oxalic acid yield.

7

Wpływ minerałów ilastych i kwasu huminowego na adsorpcję i aktywność celulaz Aspergillus niger

88%

Furczak J.

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

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1989

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tom 44

8

Improvement of tannase production under submerged fermentation by Aspergillus niger FBT1 isolated from a mangrove forest

88%

George D. S., Ong C.-B.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 4

Aspergillus niger FBT1, a local extracellular strain for tannase production, was isolated from soil collected from Matang Mangrove Forest Reserve in Perak, Malaysia. This fungus strain was cultivated in an Erlenmeyer flask under a submerged fermentation system. Medium compositions play a very important role in enhancing enzyme production during fermentation. The production of tannase by A. niger FBT1 increased significantly (95%) when the medium compositions and various process parameters were optimized. Incubation for 72 hours (30EC, pH 7) in medium complemented with sodium nitrate was found optimal. Additional supplementation with tannic acid (2% w/v) as the sole carbon source strongly increased the yield of the enzyme.

9

Effect of environmental and nutritional parameters on the extracellular lipase production by Aspergillus niger

88%

El-Batal A. I., Farrag A. A., Elsayed M. A., El-Khawaga A. M.

International Letters of Natural Sciences

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2016

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tom 60

75%

Nandy V., Bakshi M., Ghosh S., Sharma H., Basu B. R., Chaudhuri P.

International Letters of Natural Sciences

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2014

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tom 09

The mangrove fungi, morphologically and physiologically adapted in a different habitat, were isolated from mangrove habitat of Jharkhali, Sundarban, India. The physico-chemical properties like temperature, pH, soil colour, moisture content, carbon and nitrogen content of soil determines the load of microbial population. The soil sample was serially diluted and plated on potato dextrose agar plate with ampicillin to obtain fungal isolates. Total of six isolates were characterized microscopically by lacto phenol cotton blue staining. Two of them were identified as Aspergillus niger and Penicillium sp. and are subjected to biodegradation of fish scale, the major waste of fish processing industries. Aspergillus niger was found to be the best for degradation of fish scale powder by producing zone of clearance. Moreover, media without fish scale didn’t show any zone of clearance indicates the mangrove fungi are capable of degrading the fish scale component.

16

Wnikanie tlenu w procesie biosyntezy kwasu cytrynowego w bioreaktorach STR o pojemnosci 7 i 15 000 dm3

75%

Podgorski W., Lesniak W.

Biotechnologia

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2004

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nr 1

187-200

17

Zastosowanie bioreaktora wlasnej konstrukcji do wytwarzania glukoamylazy przy uzyciu Aspergillus niger C 58-III

75%

Jamroz J., Fiedurek J., Rogalski J.

Postępy Techniki Przetwórstwa Spożywczego

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1995

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tom 04

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nr 1

51-55

Przedstawiono schemat bioreaktora laboratoryjnego z mieszadłem mechanicznym. W hodowlach fermentorowych grzybów Aspergillus niger C₅₈₋ₘ wykazano przydatność urządzenia do wytwarzania.

18

Przydatność metod Aspergillus niger do oznaczania dostępnego azotu, fosforu i potasu w glebach łąkowych

75%

Walczyna J.

Roczniki Gleboznawcze

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1966

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tom 16

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nr 1

19

Otrzymywanie kwasnej proteazy metoda hodowli szczepu Aspergillus niger A.n.41-4 w podlozu stalym. Czesc I - Skala mikrotechniczna

75%

Ryszka L., Sawicka-Zukowska R., Jedrychowska B., Ilnicka-Olejniczak O.

Prace Instytutów i Laboratoriów Badawczych Przemysłu Spożywczego

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1998

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tom 53

40-58

20

Otrzymywanie transformantow drobnoustrojow o udoskonalonych cechach biotechnologicznych. Czesc I. Proby otrzymania transformantow grzybow strzepkowych o podwyzszonej aktywnosci celulolitycznej

75%

Juszczakiewicz D., Ilnicka-Olejniczak O.

Prace Instytutów i Laboratoriów Badawczych Przemysłu Spożywczego

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2001

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tom 56

18-30

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