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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
10/10/1995 |
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Data da última atualização: |
30/03/2023 |
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Autoria: |
PORGES, N. |
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Afiliação: |
Journal Series paper of the New Jersey Agricultural Experiment Station, Department of Soil Chemistry and Bacteriology. |
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Título: |
Citric acid production by aspergillus niger. |
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Ano de publicação: |
1932 |
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Fonte/Imprenta: |
American Journal of Botany, v.19, p.559-567, 1932. |
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Idioma: |
Inglês |
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Conteúdo: |
A strain of Aspergillus niger which had been isolated from the soil was studied as to its ability, to produce citric acid in a sugar solution, and an increase in o.iN titratable acidity from 30 cc. to 500 cc. per 100 cc. culture solution was obtained by the modification of the original solution. Sugar concentrations of 15 to 20 percent were necessary for high yields of citric acid, although the sugar was not completely used. A 5 percent concentration of sugar gave small yields of citric acid, as this acid was used as an energy source by the organism. As a source of nitrogen, NaNO3 was far superior to NH4NO3 or (NH4)2SO4 for citric acid production. The presence of iron and zinc was essential for rapid growth and increased citric acid accumulation. |
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Palavras-Chave: |
Concentracao de acucar. |
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Thesagro: |
Aminoácido; Nitrogênio; Zinco. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01211naa a2200169 a 4500
001 1646636
005 2023-03-30
008 1932 bl uuuu u00u1 u #d
100 1 $aPORGES, N.
245 $aCitric acid production by aspergillus niger.$h[electronic resource]
260 $c1932
520 $aA strain of Aspergillus niger which had been isolated from the soil was studied as to its ability, to produce citric acid in a sugar solution, and an increase in o.iN titratable acidity from 30 cc. to 500 cc. per 100 cc. culture solution was obtained by the modification of the original solution. Sugar concentrations of 15 to 20 percent were necessary for high yields of citric acid, although the sugar was not completely used. A 5 percent concentration of sugar gave small yields of citric acid, as this acid was used as an energy source by the organism. As a source of nitrogen, NaNO3 was far superior to NH4NO3 or (NH4)2SO4 for citric acid production. The presence of iron and zinc was essential for rapid growth and increased citric acid accumulation.
650 $aAminoácido
650 $aNitrogênio
650 $aZinco
653 $aConcentracao de acucar
773 $tAmerican Journal of Botany$gv.19, p.559-567, 1932.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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