Bajo el manto de un sarape: colores y conciliaciones internacionales a través de un objeto de arte popular
Textiles, as any other cultural artifact, weave history and creativity. This paper records the history of a sarape form Saltillo, that has hitherto kept the secrets of its singularity , not only related to its manufacture technique and design, but, particularly to a political, social and diplomatic dimension: it was witness to the cultural conciliation between  Mexico and the United States of America during the 1930´s. Like the warp and woof in this textile, the approach of these two nations interwined of ideas and acts; one of them was that of Dwight and Elizabeth Morrow in acquiring this textile featuring unusual values.
The Enormous Vogue of Things Mexican: Cultural Relations between the United States and Mexico, 1920-1935
The histories of Mexico and the United States have been intertwined since the beginning of their existence as independent nations. Diplomatic relations were established in 1822 and were maintained despite occasional ruptures, and economic links were forged early in the 19th century and became increasingly important with the passage of time. Beginning about 1900 the expanded international role of the United States brought increased attention to the cultures of other peoples, and an important aspect was a growth of interest in Latin America. By 1910, Spanish language classes were offered in American secondary schools, and because of substantial economic investments the American community in Mexico consisted of nearly 21,000 residents. Reviewing two books with Mexican themes in 1929, Waldo Frank saw them as heralds of "a campaign of an aesthetic, emotional, intellectual infiltration" of the United States by Mexico. Frank was referring to a flowering of cultural relations between the United States and Mexico that began in the 1920s and matured in the mid-1930s. The term "cultural relations" is used here to designate connections, both personal and institutional, that exposed artists and intellectuals in each country to developments in art, music, literature, and archaeology in the other. One result of these relationships was unprecedented exposure to all facets of Mexican culture in the United States, either in original form or as filtered through the consciousness of US interpreters. Delpar describes the development of cultural relations as well as the conditions in both countries that made it possible. These include the early enthusiasm of American liberals and leftists for the Mexican Revolution of 1910, the rise of cultural nationalism in Mexico and the United States, and the admiration of American neoromantics for "authentic" peoples and cultures such as might be found in Mexico. By drawing attention to the cultural link between the neighbouring republics at a time of creative ferment in both, this book complements studies of diplomatic and economic relations.
Ozonation of polycyclic aromatic hydrocarbons in oil/water-emulsions: mass transfer and reaction kinetics.
The ozonation of highly condensed polycyclic aromatic hydrocarbons (PAH) was studied in oil/water-emulsions, which are comparable to poorly water-soluble PAH in industrial wastewaters and at contaminated sites. As there was a lack of knowledge about the ozonation in oil/water-emulsions, first the ozone mass transfer was studied and optimized from the gas to the water phase and from the water to the oil phase. The ratio of mass transfer and oxidation reaction was determined by the Hatta-number and revealed a slow, quasi homogeneous reaction of ozone with PAH inside the oil droplets. Because the ozone gas concentration had no influence under the optimized conditions, the selective PAH-ozonation could be described microkinetically by a direct ozone reaction of pseudo-first order regarding PAH-concentrations. The determined PAH mean reaction rate constants of 1.02 min(-1) in oil/water-emulsions are in the upper range as found for PAH dissolved in water. These results give a new insight into the ozonation in the three-phase systems and into the treatment of highly condensed, hardly biodegradable PAH.