7 +/- 64.9 mg L(-1) for the lactate were found.
CONCLUSIONS: The final model for the process can be described by a single Monod term involving the lactate. This model resulted from the lack of sulfide inhibition in the system and the predominance of the partial lactate oxidation to acetate reaction over the complete lactate and acetate oxidation. (C) 2010 Society of Chemical Industry”
“BACKGROUND: Heterogenization of homogeneous catalyst has become an interesting process for the catalytic oxidation of olefins and aromatic alcohol. selleck chemicals llc This may provide a new kind of catalyst that is not only friendly to the environment but also exhibits higher
thermal and chemical stabilities.
RESULTS: Polymer anchored Schiff-base complexes of iron(III), copper(II) and cobalt(II) have been synthesized and characterized. The catalytic potential of these complexes has been tested for the oxidation of cyclohexene. The effect of varying solvent, oxidant, substrate oxidant molar ratio, temperature and catalyst amount has been studied. Under optimized reaction conditions 91, 88 and 81% conversion of cyclohexene was obtained with Fe(III), Cu(II) and Co(II) catalysts, respectively. Moreover, the oxidation of other substrates, such as styrene, benzylalcohol, toluene and 1-hexene were also efficiently carried out by these catalysts.
CONCLUSION: The immobilized HDAC cancer complexes showed excellent catalytic
activity along with high selectivity for the oxidation of olefins and alcohols. The catalysts can be recycled more than five times without any noticeable loss of catalytic activity. (C) 2009 Society of Chemical Industry”
“BACKGROUND: CO(2)- evolution tests (OECD 301-B), formerly known as modified Sturm tests, are commonly used for evaluation of the biodegradation potential of non-volatile molecules through measurement of the carbon dioxide produced. Extension of the modified Sturm test to evaluation of the toxicity of veterinary antibiotics, tetracycline and tylosine, on the biological treatment of swine wastewater was examined in
this work.
RESULTS: Modified CX-6258 Sturm test results highlighted the care which should be given to the description of the operational parameters (matrix and inoculum source). Using lab-scale inoculum, it was shown that the toxicity threshold of tetracycline (7-10 mg L(-1) total organic carbon (TOC)) was higher than that of tylosine (4-5 mg L(-1) TOC). Tylosine was found to be slightly biodegradable while total non-biodegradability was found for tetracycline.
CONCLUSION: The higher tetracycline biodegradability may be related to the molecular conformation of tetracycline and tylosine antibiotics, the former is constituted of four benzoic cycles hardly breakable, while tylosine is constituted of a central structure with attached glycosidic-like fragments which might easily be biologically degraded.