El comercio exterior latinoamericano en el primer semestre de 1958 = Latin American foreign trade in the first half of 1958

Incluye Bibliografía

Trade in transgenic products: a review of the international debate

Includes bibliography

Enhanced stability in CO2 of Ta doped BaCe0.9Y 0.1O3-δ electrolyte for intermediate temperature SOFCs

The influence of Ta concentration on the stability of BaCe 0.9-xTaxY0.1O3-δ (where x=0.01, 0.03 and 0.05) powders and sintered samples in CO2, their microstructure and electrical properties were investigated. The ceramic powders were synthesized by the method of solid state reaction, uniaxially pressed and sintered at 1550 °C to form dense electrolyte pellets. A significant stability in CO2 indicated by the X-ray analysis performed was observed for the samples with x≥0.03. The electrical conductivities determined by impedance measurements in the temperature range of 550-750 °C and in various atmospheres (dry argon, wet argon and wet hydrogen) increased with temperature but decreased with Ta concentration. The highest conductivities were observed in the wet hydrogen atmosphere, followed by those in wet argon, while the lowest were obtained in the dry argon atmosphere for each dopant concentration. The composition with Ta content of 3 mol% showed satisfactory characteristics: good resistance to CO2 in extreme testing conditions, while a somewhat reduced electrical conductivity is still comparable with that of BaCe0.9Y0.1O3-δ. © 2012 Elsevier Ltd and Techna Group S.r.l.

La mujer en el comercio interinsular de productos agrícolas en el Caribe Oriental = Women in the inter-island trade in agricultural produce in the Eastern Caribbean

Incluye Bibliografía

Uruguay Round issues: elements of a multilateral framework for trade in services

Comenta varios elementos propuestos durante las negociaciones en el Grupo de Negociaciones en Servicios de la Ronda Uruguay. Incluye en anexos un examen del curso de las negociaciones, conceptos amplios e instrumentos internacionales relevantes para ellas y modelos que contienen algunos elementos para un marco multilateral del comercio en servicios.

Posibilidades de aumentar el comercio regional de bienes de minerales metálicos y de metales = Possibilities for increasing regional trade in metallic minerals and metals

Incluye Bibliografía

Report of ECLAC Subregional Workshop on Trade in Services

Resume las presentaciones y debates del Taller Subregional sobre Comercio de Servicios. Incluye lista de participantes y titulos de los documentos presentados.

The informal trade in the Leeward Islands

Includes bibliography

Intra-CDCC trade in the 1990s

Includes bibliography