A newly discovered Upper Cretaceous to lower Paleogene section at Loma Capiro (central Cuba) has provided new evidence for a Cretaceous-Paleogene boundary age for the Chicxulub impact. The studied sediments at Loma Capiro consist of a foraminifera-rich marl and sandstone hemipelagic sequence, and a 9.6-m-thick intercalated clastic complex. Planktic foraminifera indicate an upper Maastrichtian age for the sediments below the clastic complex and a lowermost Danian age for those just above this complex. Small benthic foraminifera from below and above the clastic complex indicate deposition at middle to lower bathyal depths. The fining-upward clastic complex consists of a basal breccia that is overlain by microconglomerates and coarse-to fine-grained sandstones. The clastic complex contains reworked foraminifera from different ages and different paleoenvironments and, toward the top, impact material such as altered microtektites, shocked quartz, terrestrial chondrules, and accretionary lapilli. These microfacies suggest deposition from gravity flows that eroded sediments from upper-slope and shelf settings and redeposited them in deeper bathyal environments. We suggest that the origin of the clastic complex may be linked to the collapse of the Cuban platform, triggered by the Cretaceous-Paleogene impact at Chicxulub.
The effect of breed and dietary avocado level on the total apparent digestibility (RAD) and balance of nitrogen (N) energy, in young pigs, was studied. Four Pelón Mexicano (PM) and four Yorkshire × Landrace (Y×L) barrow male pigs (39.2 kg average inital liveweight) distributed in two groups according to a change over design in a 2×2 factorial arrangement (breed and diet) were used. The pigs received on a pair feeding basis (0.10 kg DM/kg W 0.75 per day), the experimental diets. The diets were formulated to contain 30 or 150 g crude fat by partial replacement of the maize/soyabean meal diet by avocado (Persea americana Mill.) fresh pulp. The RAD of crude fat was 73.8 and 71.5% and that of N was 83.4 and 82.8 % in PM and Y×L pigs, respectively. There was no significant effect (P>0.10) of crude fat level on RAD of N and energy. N and energy balance significantly (P<0.05) favoured Y×L as compared with PM pigs. In conclusion, the poor N retention of PM pigs could be related to body composition of this local, non improved genotype. The use of avocado for feeding pigs, PM included, should determine a high digestibility of the crude fat fraction and at the same time a considerable deterioration of N retention, probably due to an unbalanced composition of amino acids. The level of avocado pulp inclusion in the diet of the pig should be involved in these circumstances.
Iniciarse en el comercio internacional es una alternativa de crecimiento para las empresas de todo tamaño, una oportunidad también para los emprendedores capaces de ofrecer bienes o servicios competitivos en los mercados internacionales. Además, como nunca antes, la tecnología favorece el surgimiento de negocios diversos que facilitan el intercambio al reducir aun más las barreras originadas en el desfase horario y los distintos idiomas, regulaciones, monedas y culturas. En este mundo de apertura y posibilidades, es fundamental que empresas e individuos conozcan las bases, los instrumentos y el conjunto de actividades que comprenden el comercio y los negocios internacionales. Las primeras, porque en algún momento querrán salir a competir al exterior; los segundos, porque el comercio internacional también es un vasto campo de desarrollo para profesionales de distintas especialidades. A este objetivo apunta precisamente Negocios internacionales: funcionamiento y operatividad, pues en doce capítulos desarrolla tanto el marco institucional que rodea al comercio exterior como la operatividad misma de las empresas exportadoras e importadoras. Abarca el sistema financiero internacional y el de pagos internacionales, los tipos de riesgos, las líneas de crédito y el mercado de divisas, los instrumentos de pago, las alternativas de financiamiento —incluidas las no convencionales—, los incoterms y la distribución física, por mencionar solo algunos temas. Múltiples actores desfilan por sus páginas: clasificadoras de riesgo, seguros, transportistas, aduanas, cámaras de compensación, financiamientos no convencionales, bancos en todos sus roles, entre otros. Con propósito didáctico, el libro incluye figuras que muestran el flujo de las operaciones, ejemplos que ilustran situaciones prácticas, así como cuadros comparativos y de síntesis. Esperamos que este trabajo sea de interés y utilidad tanto para estudiantes universitarios como para importadores, exportadores, intermediarios del comercio internacional, empresarios y toda persona interesada en investigar acerca de esta actividad. A todos ellos está dirigido este libro.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.