The Mexican Colonial Copper Industry

NEW REFRACTORY MATERIALS FOR THE COPPER INDUSTRY

Wear of various basic refractory materials to substitute to currently used magnesia chrome bricks has been studied, measuring matte and slag penetration and dissolution, through different cup and rotary slag tests. High magnesia with and without impregnation, magnesia graphite, magnesia-alumina spinel with and without impregnation, olivine-magnesia and olivine magnesia- graphite bricks, as well...

The Relationship between Copper & Zinc Concentration and Free Radical Markers in Copper Industry Workers

Introduction: Copper and zinc play a key role in oxidative reactions and in vivo studies have shown their different effects. In this study we examined the influence of exposure to copper and zinc on catalase and superoxide dismutase (SOD) activities in erythrocytes, total serum antioxidant capacity and malondiadehyde (MDA) production of copper industry workers. Methods: In the present study...

Guadalupe and the Castas: The Power of a Singular Colonial Mexican Painting

Trade Liberalization . . . A Panel Study of the Mexican Manufacturing Industry

In recent y ears there has been a revival of interest in the trade-growth nexus. A number of authors have suggested that regional economic integration and liberalization of international trade are likely to have positive eects not only on productivity levels but also on long-term productivity growth rates in developing countries. Using a panel of Mexican manufacturing industries, this paper exa...

Implementation of HACCP in the Mexican Poultry Processing Industry

Hazard Analysis and Critical Control Point (HACCP) is a safety and quality management tool used as major issue in international and domestic trade in food industry. However, detailed information on costs and benefits of HACCP implementation is needed to provide appropriate advice to food processing plants. This paper reports on the perceptions of costs and benefits by the Mexican poultry proces...