Decolorization of azo dye, methyl red
by Saccharomyces cerevisiae MTCC 463.
It had been found to be negative for indole test (no blue color), citrate test, methyl red
Voges-Proskeur test (no red color), casein hydrolysis test (no clear zone) and for starch agar test.
Aerobic conditions and the dynamics of the methyl red
reaction in Klebsielleae.
The indicator, two drops of methyl red
indicator, was added just before the start of the titration.
Physical and Biochemical characterization of Burkholderia multivorans Cultural characterization Burkholderia multivorans Colony Morphology Small, Pigmented circular, Flat, Entire, Dry colonies Gram's Staining Gram Negative Motility Active Mobile Catalase - Oxidase - Methyl Red
- Indole - Citrate Test + Nitrate Test + + Positive, - Negative Table 2.
Their growth on Eosin methylene blue agar with appearance of green metallic sheen, positive for indole and oxidase production, methyl red
test and negative Voges-Proskauer and citrate utilization tests confirmed these isolates as those of E.
The results obtained by using conventional biochemical test confirmed the significant difficulties for Klebsiella differentiation at the species level, even when reference strains were included and biotyping by other methods; some inconsistent findings were obtained for Methyl red
and Voges Proskauer reactions.
El-Banna, Organic Dyes in Chemical Dosimetry Use of P-ethoxychrysoidine and Methyl Red
in Chemical Dosimetry.
Biochemical characterization revealed all isolates positive for catalase, urease and acid production test, whereas 23 isolates showed positive for casein and starch hydrolysis test, four isolates observed positive for gas production test and 25 isolates showed positive for oxidase, gelatine liquification, methyl red
and citrate utilization test.
Biochemical tests Results 1 Indole Positive 2 Methyl red
Positive 3 Voges-Proskauer Negative 4 Oxidase Positive 5 Catalase Positive 6 Nitrate reduction Positive 7 Urease Positive 8 Esculin hydrolysis Positive 9 Casein hydrolysis Positive 10 Casein hydrolysis Positive 11 Arginine dehydrolase Positive 12 DNase Positive 13 ONPG Positive Table 3.
06 Vol Percent Sample 100 Ml N/10 Hcl Methyl Red