Laccases are oxidative enzymes related to the degradation of phenolic compounds, including lignin units, with concomitant reduction of oxygen to water. Delignification is a necessary pretreatment step in the process of converting plant biomass into fermentable sugars. The objective of this work was to optimize the production of laccases and to evaluate the delignification of sugarcane bagasse b...

Electrodeposition experiments conducted in a thin-layer horizontal cell containing a nonbinary aqueous electrolyte prepared with cupric sulfate and sodium sulfate gave rise to fingerlike deposits, a novel and unexpected growth mode in this context. Both the leading instability from which fingers emerge and some distinctive features of their steady evolution are interpreted in terms of a simple ...

The desulfurization of gas streams using aqueous iron(II)sulfate (Fe(II)SO4), zinc sulfate (ZnSO4) and copper sulfate (CuSO4) solutions as washing liquor is studied theoretically and experimentally. The desulfurization is accomplished by a precipitation reaction that occurs when sulfide ions and metal ions are brought into contact with each other. A thermodynamic study has been used to determin...

The aim of the present research was to examine process bioleaching and application a combined for recovery copper nickel from industrial sand deposits. investigated sample sands finer than 0.1 mm in size contained 0.32% Ni 0.22% Cu. Industrial were processed by flasks on thermostatically controlled shaker. In addition, roasting experiments carried out with ammonium sulfate. An attempt also made...

The fate of organic herbicides applied to agricultural fields may be affected by other soil amendments, such as copper applied as a fungicide. The effect of copper on the leaching of diuron and glyphosate through a granitic and a calcareous soil was studied in the laboratory using sieved-soil columns. Each soil was enriched with copper sulfate to obtain soil copper concentrations of 125, 250, 5...

Pope et al. (2007) found lowered monthly mortality rates during a 1967–1968 copper smelter strike, coincident with and attributed to widespread reduced airborne sulfate levels. The authors cited three “intervention” studies associating particulate emissions reductions with mortality reductions as supportive. Evidence below suggests that mortality reductions in the study by Pope et al. and “inte...

Five different micropaleontological methods (H2O2, Glauber's salt, liquid nitrogen, acetic acid + Copper(ll) sulfate, and formic acid) were applied to study the differences of obtained agglutinated foraminiferal faunas typical hemipelagic carbonate deposits mid-Cretaceous Europe, prove whether there is a method–derived bias knowledge about in these sedimentological settings. Split samples same ...