RESUMO
Using the method of mathematical planning of experiment the effect of calcium, magnesium, manganese, iron, zinc and copper on synthesis of antibiotic and pigment by mycophilic fungus Hypomyces rosellus has been studied. The ions of Mg2+, Mn2+, Fe2+ have been found to be important for antibiotic and pigment formation by fungus, the ions of Mg2+ and Mn2+ are interchangeable.
Assuntos
Antibacterianos/biossíntese , Hypocreales/efeitos dos fármacos , Metais/farmacologia , Pigmentos Biológicos/biossíntese , Cátions , Meios de Cultura , Relação Dose-Resposta a Droga , Hypocreales/metabolismo , Matemática , Projetos de PesquisaRESUMO
The authors observed maximum simultaneous biosynthesis of antibiotic and pigment in the microphilic fungus with using 48-hour seed mycelium having the specific growth rate of 0.008-0.011 h-1 in an amount of 5-7 per cent (v). The Balling 4 degrees wart and Chapek medium with 1 per cent of soybean flower and 1 per cent of corn steep liquor may be used for growing the seed mycelium. No significant effect of the seed medium composition and seed mycelium age on the pigment production was observed.
Assuntos
Antibacterianos/biossíntese , Fungos Mitospóricos/metabolismo , Pigmentos Biológicos/biossíntese , Meios de Cultura , Farinha , Fungos Mitospóricos/crescimento & desenvolvimento , Glycine max , Fatores de Tempo , Zea maysRESUMO
Using the method of mathematical design of an experiment the synthetic medium ensuring the growth of the mycophilous fungus Hypomyces rosellus 94/77 and its production of antibiotic and pigment has been worked out.
Assuntos
Antibacterianos/biossíntese , Meios de Cultura/metabolismo , Hypocreales/crescimento & desenvolvimento , Pigmentos Biológicos/biossíntese , Hypocreales/metabolismo , Matemática , Projetos de Pesquisa , Temperatura , Fatores de TempoRESUMO
Regulation of protease and pigment production in Hypomyces rosellus by the medium components was easier than that of antibiotic production. Medium was developed. The activity of exoproteases and pigment with the use of this medium increased up to 385-800 PU/ml and 0.68-0.83 arbitrary units, respectively. The level of the antibiotic biosynthesis was insignificant.
Assuntos
Antibacterianos/biossíntese , Meios de Cultura/metabolismo , Hypocreales/metabolismo , Peptídeo Hidrolases/biossíntese , Pigmentos Biológicos/biossíntese , Relação Dose-Resposta a Droga , Matemática , Métodos , Projetos de PesquisaRESUMO
A protease complex with high caseinolytic activity capable of hydrolysing various protein substrates was isolated from the culture fluid of Hypomyces rosellus. The preparation is stable at pH 6.0-11.0. The temperature optimum of its activity and stability is 50 degrees C. The protease complex preserves its initial activity at 4 degrees C for a month.
Assuntos
Hypocreales/enzimologia , Peptídeo Hidrolases/metabolismo , Albuminas/metabolismo , Animais , Caseínas/metabolismo , Exopeptidases , Fibrinólise , Hemoglobinas/metabolismo , Concentração de Íons de Hidrogênio , Especificidade por Substrato , TemperaturaRESUMO
Fifty bacterial cultures were isolated from technical oils stored for different periods of time. Twenty out of the fifty strains decomposed technical oils. The bacteria were identified and classified as Bacillus strains. Bacillus subtilis, strains 7 and 10, and B. pumilus, strain 13, isolated from oils MK-8 + 10% Akor-1 and MT-16p as well as from AMG-10 were found to be most active and can be recommended as test cultures to study the resistance of technical oils against bacterial degradation.
Assuntos
Bacillus/enzimologia , Óleos/metabolismo , Bacillus/classificação , Bacillus/isolamento & purificação , Biodegradação Ambiental , Clima , PetróleoRESUMO
The ability to synthesize antibiotics and exoproteases was studied in 13 species belonging to the Actinomadura genus. The antibiotic and proteolytic activities were found only in A. fulvescens INA-3321 and A. citrea INA-1849. Glycerol was shown to be the best carbon source for the growth and biosynthetic activity of A. fulvescens. A. citrea had a wider spectrum of carbon sources used for the growth and a higher proteolytic and antibiotic activity. A. citrea exerted the maximal biosynthetic activity and the best growth in a medium with starch and xylose. The effect of different nitrogen sources on the growth and biosynthetic activity of A. citrea was also studied.
Assuntos
Actinomycetales/metabolismo , Antibacterianos/biossíntese , Peptídeo Hidrolases/biossíntese , Actinomycetales/crescimento & desenvolvimento , Antibacterianos/farmacologia , Bacillus subtilis/efeitos dos fármacos , Caseínas/metabolismo , Meios de Cultura/metabolismo , Exopeptidases , Concentração de Íons de Hidrogênio , Fatores de TempoRESUMO
Using method of mathematical planning of experiment the culture medium ensuring the simultaneous intensive production of ristomycin, protease and violet pigment by Nocardia fructiferi has been worked out.
Assuntos
Meios de Cultura/metabolismo , Nocardia/metabolismo , Peptídeo Hidrolases/biossíntese , Pigmentos Biológicos/biossíntese , Ristocetina/biossíntese , Matemática , Projetos de Pesquisa , Fatores de TempoRESUMO
A new water-soluble photochromogenic fluorescent violet pigment with the indicator properties was isolated from the culture fluid of Nocardia fructiferi var. ristomycini, strain 76. By its solubility and mobility in various solvent systems and by the absorption spectrum the new pigment is close but not identical to such a pigment as rubrocyanin. The presence of microelements, i.e. iron and magnesium in the medium was shown to be necessary for production of violet pigment.
Assuntos
Nocardia/metabolismo , Antocianinas/farmacologia , Meios de Cultura/análise , Ferro/farmacologia , Magnésio/farmacologia , Pigmentos Biológicos/isolamento & purificaçãoRESUMO
A complex of proteases was isolated from the culture fluid of Nocardia fructiferi var. ristomycini, strain 76. The complex showed caseinolytic activity and was capable of coagulating milk for 30 minutes. It was stable at a temperature of 50 degrees C and pH 8.0. The maximum level of casein hydrolysis was observed at 37 degrees C and pH 8.0. The protease complex preserved its properties for 3 months at 4 degrees C and for 1 month at room temperature.