Fumaric Acid
Mostrando 13-24 de 54 artigos, teses e dissertações.
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13. Determinacion de la configuracion E-Z de los acidos Fumarico y Maleico. Un experimento orientado a incentivar el desarrollo de la investigacion cientifica en alumnos de Pregrado
In this work we intend to eliminate the idea that laboratory exercises seem like cookbooks. That is, exercises shall be presented as a problematic situation. Based on observation and experimentation, the students should determine the E-Z configuration of maleic and fumaric acids. The basis of this laboratory exercise is the acid-catalyzed isomerization of ma
Química Nova. Publicado em: 2000-08
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14. EFFECTS OF ROOT-DERIVED ORGANIC ACIDS ON METAL SPECIATION IN SOIL SOLUTION AND BIOAVAILABILITY
Several plant species can exude relative large amounts of low-molecular-weight organic acids (LMWOAs) into the hizosphere. Limited information is available about the effects of these compounds on the mobilization and bioavailability of trace metals for plants. The objective of this study was to measure the impact of in situ-produced and added LMWOAs on metal
Publicado em: 2000
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15. Estudo quimico da unidade de tratamento de gas liquifeito de petroleo (GLP) e gas combustivel (GC) e tentativas de sintese da pirazinamida
The object of this work was to solve some interesting problems in applied chemistry, one in the petrochemical area and anoyher in the area of pharmaceutical chemistry. In the petrochemical area we studied solutions of diethanolamine that is used currently in Fluid Catalyt Craking (FCC) plants for the elimination of acidic gases from fuel gas (FC) and liquid
Publicado em: 1988
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16. Mechanism of Fumaric Acid Accumulation in Rhizopus nigricans
It is doubtful that the glyoxylate bypass plays a significant role in the accumulation of fumaric acid by fungi, as has been postulated. In high glucose media, which favor fumarate production, isocitrate lyase (threo-Ds isocitrate glyoxylate lyase), which is the key enzyme of the glyoxylate bypass, is strongly repressed. The specific activity of this enzyme
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17. Influence of Nutritional Conditions on Production of l-Glutamine by Flavobacterium rigense
The nutritional conditions for the production of l-glutamine by Flavobacterium rigense strain 703 were investigated. The optimum concentration of ammonia for achieving the highest yield of l-glutamine (25 mg/ml of broth) was relatively broad, from 0.9 to 1.6%, whereas fumaric acid had a narrow optimum range, near 5.5%. High concentration of inorganic ions su
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18. Production of Fumaric Acid in 20-Liter Fermentors
The conditions necessary for the production of fumaric acid in 20-liter fermentors by fermentation of glucose with Rhizopus arrhizus strain NRRL 2582 were determined. Continuous neutralization of fumaric acid was necessary for optimal yields. Yields of the calcium salt were in excess of 65 g of fumaric acid from 100 g of sugar consumed during fermentation of
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19. Gas-liquid chromatography technique for detection of hippurate hydrolysis and conversion of fumarate to succinate by microorganisms.
A gas-liquid chromatography technique which allows simultaneous detection of hippuric acid (N-benzoylglycine) hydrolysis and conversion of fumaric acid to succinic acid by microorganisms uses a new medium, hippurate-formate-fumarate broth, and a gas chromatograph equipped with a thermal conductivity detector. This technique gave more reproducible results tha
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20. Inducible overexpression of the FUM1 gene in Saccharomyces cerevisiae: localization of fumarase and efficient fumaric acid bioconversion to L-malic acid.
Cloning of the Saccharomyces cerevisiae FUM1 gene downstream of the strong GAL10 promoter resulted in inducible overexpression of fumarase in the yeast. The overproducing strain exhibited efficient bioconversion of fumaric acid to L-malic acid with an apparent conversion value of 88% and a conversion rate of 80.4 mmol of fumaric acid/h per g of cell wet weig
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21. Treatment of disseminated granuloma annulare with fumaric acid esters
BioMed Central.
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22. Production of Fumaric Acid by Rhizopus arrhizus1
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23. Successful treatment of recalcitrant cutaneous sarcoidosis with fumaric acid esters
BioMed Central.
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24. In vitro pharmacokinetics of anti-psoriatic fumaric acid esters
BioMed Central.