A sulfate solution containing 1773.965 mg/L Mn2+, 3216.178 Mg2+ and 566.254 Ca2+ was used to perform the maximum recovery of manganese minimum magnesium. Carbonate precipitation due better selectivity for over magnesium other impurities compared hydroxide precipitation. Four factors were studied: pH value, contact time, reaction temperature sodium carbonate consumption. Analysis variance (ANOVA...

in this study, the growth of two strains pseudomonas fluorescens vupf5 and p. fluorescens vupf5-1 (mutant bacterium similar to mutants of regulatory gacs/gaca system) were evaluated in the organic media. this spontaneous mutation blocked biosynthesis of the antimicrobial compounds hydrogen cyanide, phenazine and exoprotease by biocontrol strain pseudomonas fluorescens vupf5. by using organic me...

In this research iron manganese oxide nanocomposites were prepared by co-precipitation, sol-gel and mechanochemical methods by using iron (III) nitrate, iron (II) sulfate and manganese (II) nitrate as starting materials. These nanocomposites were prepared in the presence of various catalyst beds. The polyvinyl pyrrolidon (PVP) was used as a capping agent to control the agglomeration of the nano...

A series of studies were conducted to determine the effect of supplemental trace mineral source on growth performance, morbidity, and trace mineral status in growing beef cattle. The first experiment evaluated supplemental trace minerals from sulfate, organic, or hydroxy sources on growth performance and morbidity. Crossbreed beef calves were assigned to 1 of 3 treatments consisting of suppleme...

The dissimilatory adenosine-5'-phosphosulfate reductase is a key enzyme of the microbial sulfate reduction and sulfur oxidation processes. Because the alpha- and beta-subunit-encoding genes, aprBA, are highly conserved among sulfate-reducing and sulfur-oxidizing prokaryotes, they are most suitable for molecular profiling of the microbial community structure of the sulfur cycle in environment. I...