Separation Time of Aluminothermic Reduction Products for Sustainable Silicon Production.

Background: This work was carried out within the framework of the SisAl Pilot project, which is devoted to the environmentally friendly production of silicon. This new method relies on the aluminothermic reduction of quartz in slag, offering a more sustainable alternative to the traditional reduction of silica with carbon in submerged arc furnaces.

Methods: The process takes place in a rotary kiln producing silicon (Si) and alumina slag (actually, a CaO - Al O slag), which must be separated at the end to extract the silicon.

[Hemoglobin changes (Hb) in miners exposed to high altitude and associated factors].

Aim: To determine the variation of hemoglobin (Hb) in two groups of miners working at different altitudes.

Methodology: A longitudinal study conducted in a private company. Hb was obtained from entrance exams and annual checks of workers at two locations: at sea level and at Peruvian highlands (4,100 m), taken by trained staff and equipment calibrated to environmental conditions.

[Nasal leprosy: impact of multitherapy in the morphology and physiology of the nose].

Introduction: The multi-drug therapy protocol has allowed leprosy patients following this strategy to achieve complete recovery without developing neurotrophic sequelae or deformities.

Objectives: To assess the impact of multi-drug therapy on the development of nasal deformities and nasal airway patency.

Patients And Method: In an overall group of 84 patients studied, 38 were treated with a therapy based on a single drug and 22 were treated with multi-drug while 24 subjects formed a control group.