Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus, precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneous pressure oxidation cyanidation. The effectiveness of this process extraction can be influenced the temperature, cyanide (NaCN) concentration, oxygen pressure. In study, we conducted experiments to characteriz...

Fractionation of plant compounds to produce active purified fractions is a multi-step process, time-consuming and sometimes very expensive. This paper presents a single-step fractionation of tannins from a local plant, Phyllanthus niruri Linn. using supercritical fluid extraction (SFE) method. The effects of operating conditions (pressure, temperature, flow rate, cosolvent content and ethanol-w...

Aqueous two-phase extraction (ATPE) is a green separation technique which uses mixtures of water and environmentally benign polymers such as polyethylene glycol (PEG) solvents. One the challenges in implementing this on an industrial scale finding suitable method for isolation target compounds from water-polymer solutions after extraction, without diminishing ecological benefits method. In pape...

HYPOTHESIS Alternating intrathoracic pressure by means of a chest cuirass can cause perfusion and ventilation equal to or better than standard cardiopulmonary resuscitation (CPR) for humans in cardiac arrest. DESIGN Nonrandomized, nonblinded, crossover pilot study. SETTING Large urban emergency department. SUBJECTS Five adult normothermic, nontraumatic, out-of-hospital cardiac arrest pati...