metal ions

Іmpact of nitrogen sources, salts, and В-group vitamins on the biosynthesis of lactic acid

The study established a direct correlation between the concentration of corn steep liquor in the fermentation medium and the amount of lactic acid, as well as the biochemical requirements of Lactobacillus delbrueckii UY-2/13 for nitrogen-containing components of corn steep liquor. In particular, it was found that at a corn steep liquor concentration of 160 g/dm³, the maximum lactic acid concentration (101.37 g/dm³) was achieved with a yield of 94.39%.

Synthesized Copolymer Derivative of Poly(Styrene-alt-Maleic Anhydride) as a New Chelating Resin to Remove Heavy Metal Ions from Aqueous Solution

Chelating resin as a new copolymer for metal ions removal was prepared using 3-(4-hydroxyphenyl) cyclopropane-1,1,2,2-tetracarboxylic acid and 1,2-diaminoethane on the poly(styrene-alt-maleic anhydride). Parameters of sorption behavior were investigated under various conditions. Kinetics studies revealed that the adsorption process confirmed the pseudo-second-order kinetics and adsorption data were well fitted to Langmuir isotherm.