A comparative analysis of chromosome pairing at metaphase I in interspecific hybrids between durum wheat (Triticum turgidum L.) and the most widespread Aegilops species.

Homoeologous metaphase I (MI) associations in hybrids between durum wheat and its wild allotetraploid relatives Aegilops neglecta, Ae. triuncialis and Ae. ventricosa have been characterized by a genomic in situ hybridization procedure that allows simultaneous discrimination of A, B and wild species genomes. Earlier results in equivalent hybrids with the wild species Ae. cylindrica and Ae. geniculata have also been considered to comparatively assay the MI pairing pattern of the durum wheat × Aegilops interspecific combinations more likely to occur in nature. The general picture can be drawn as follows. A and B wheat genomes pair with each other less than the 2 wild constituent genomes do in any of the hybrid combinations examined. Interspecific wheat-wild associations account for 60–70% of total MI pairing in all hybrids, except in that derived from Ae. triuncialis, but the A genome is always the wheat partner most frequently involved in MI pairing with the wild homoeologues. Hybrids with Ae. cylindrica, Ae. geniculata and Ae. ventricosa showed similar reduced levels of MI association and virtually identical MI pairing patterns. However, certain recurrent differences were found when the pattern of homoeologous pairing of hybrids from either Ae. triuncialis or Ae. neglecta was contrasted to that observed in the other durum wheat hybrid combinations. In the former case, a remarkable preferential pairing between the wild species constituent genomes Ut and Ct seems to be the reason, whereas a general promotion of homoeologous pairing, qualitatively similar to that observed under the effect of the ph1c mutation, appears to occur in the hybrid with Ae. neglecta. It is further discussed whether the results reported here can be extrapolated to the corresponding bread wheat hybrid combination

Generalized Coherent States and Spin S≥1S\geq 1 Systems

Generalized Coherent States (GCS) are constructed (and discussed) in order to study quasiclassical behaviour of quantum spin models of the Heisenberg type. Several such models are taken to their semiclassical limits, whose form depends on the spin value as well as the Hamiltonian symmetry. In the continuum approximation, SU(2)/U(1) GCS when applied give rise to the well-known Landau-Lifshitz classical phenomenology. For arbitrary spin values one obtains a lattice of coupled nonlinear oscillators. Corresponding classical continuum models are described as well.Comment: 18 pages, LaTeX. Submitted to J. of Phys. A: Math. and Ge

Optimization of ultrasound, vanillin and pomegranate extract treatment for shelf-stable unpasteurized strawberry juice

Optimum combination of ultrasound, vanillin and pomegranate extract to improve quality of strawberry juice was determined using response surface methodology. Samples were stored at 5 °C for 14 days. The optimal conditions to simultaneously minimize native microflora, maximize nutritional parameters and minimize the impact on sensory quality resulted in: 7.5 min of ultrasound treatment, pomegranate extract concentration of 360 μg/mL and vanillin concentration of 0.925 mg/mL. A new batch of strawberry juice was treated at these optimal conditions and stored for validation of the optimization and to evaluate the performance of the optimum treatment on quality parameters throughout storage. Furthermore, a second batch of juice was inoculated with Escherichia coli O157:H7 and processed at optimal conditions to evaluate the effectiveness of the treatment on the pathogen survival. The native microflora of the juice, as well as inoculated pathogen, decreased significantly using the proposed hurdle technologies, with no impact on sensory parameters. Ascorbic acid retention was slightly decreased by the optimum treatment; however, DPPH and polyphenolic compounds were significantly higher than those in untreated sample. Overall, a combination of ultrasound, vanillin and pomegranate extract showed interesting potential to enhance quality and safety of strawberry juice, extending the shelf-life of the product.Fil: Tomadoni, Bárbara María. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Cs.agrarias. Area Ciencia de Alimentos; ArgentinaFil: Cassani, Lucía Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Ciencia. Tecnología e Innovación Productiva. Agencia Nacional de Promoción Cientifíca y Tecnológica; ArgentinaFil: Ponce, Alejandra Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Cs.agrarias. Area Ciencia de Alimentos; ArgentinaFil: Moreira, Maria del Rosario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Cs.agrarias. Area Ciencia de Alimentos; ArgentinaFil: Agüero, M. V.. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Current collection at the shuttle orbiter during TSS‐1R high voltage charging

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95673/1/grl10526.pd

Investigaciones recientes sobre el langostino nativo Macrobrachium americanum (Decapoda: Palaemonidae) con fines de acuicultura y conservación

where good management practices on aquaculture are mandatory. The economic and ecological importance of prawns of the Genus Macrobrachium cause an impact at a global level involving economic, academic and social aspects. Macrobrachium americanum appears as one of the genus species with high nutritional value and an economic demand in the national and international markets, as well as a vital income for fisherman and producers of this species. For researchers, it is a challenge to find solutions to culture and propose conservation measures for M. americanum with emphasis on development, nutrition and reproduction. Although there are scientific studies supporting the economic importance of this species, our knowledge about its cultivation, reproduction and conservation is limited. This paper summarizes the latest studies made in cooperation with M. americanum in research lead by the Centro de Investigaciones Biológicas del Noroeste, Mexico. After several years of continuous research, it is considered that those efforts have produced useful information for the sustainable exploitation, conservation and basic management practices of this species.En los últimos tiempos ha existido una gran preocupación por la conservación y uso adecuados de los recursos naturales vivos, donde las buenas prácticas de manejo en la acuicultura son importantes. La importancia económica y pesquera de los langostinos del Género Macrobrachium causa un impacto a nivel global que incluye aspectos económicos, académicos y sociales. Macrobrachium americanum se presenta como una de las especies del género con alto valor nutritivo y demanda económica en el mercado nacional e internacional y constituye un importante ingreso para los pescadores y productores de esta especie. Para los investigadores es un desafío encontrar soluciones para la conservación del M. americanum con énfasis en el desarrollo, la nutrición y la reproducción. Aunque existen estudios científicos que avalan la importancia económica de esta especie, nuestro conocimiento sobre su cultivo, reproducción y conservación es limitado. Este artículo resume algunos estudios en colaboración sobre M. americanum, liderados por el Centro de Investigaciones Biológicas del Noroeste, México. Después de varios años de investigación continua, se considera que esos esfuerzos han producido información útil para la explotación sostenible, conservación y las posibles medidas de manejo para esta especie

Novel compound shows in vivo anthelmintic activity in gerbils and sheep infected by Haemonchus contortus

8 páginas, 2 figuras, 2 tablas.The control of gastrointestinal nematodes in livestock is becoming increasingly difficult due to the limited number of available drugs and the rapid development of anthelmintic resistance. Therefore, it is imperative to develop new anthelmintics that are effective against nematodes. Under this context, we tested the potential toxicity of three compounds in mice and their potential anthelmintic efficacy in Mongolian gerbils infected with Haemonchus contortus. The compounds were selected from previous in vitro experiments: two diamine (AAD-1 and AAD-2) and one benzimidazole (2aBZ) derivatives. 2aBZ was also selected to test its efficacy in sheep. In Mongolian gerbils, the benzimidazole reduced the percentage of pre-adults present in the stomach of gerbils by 95% at a dose of 200 mg/kg. In sheep, there was a 99% reduction in the number of eggs shed in faeces after 7 days at a dose of 120 mg/kg and a 95% reduction in the number of worm adults present in the abomasum. In conclusion, 2aBZ could be considered a promising candidate for the treatment of helminth infections in small ruminants. © 2022, The Author(s).Financial support came from MINECO: RETOS (AGL2016-79813-C2-1R/2R) and MICINN/AEI (PID2020- 119035RB-100). EVG was funded by FPU17/00627, FPU17/05346; VCGA, MAB, MCP and LGP are recipients of Junta de Castilla y León (JCyL) (LE082-18, LE051-18, LE135-19, LE096-20, respectively) and MMV by the Spanish “Ramon y Cajal” Programme (Ministerio de Economía y competitividad; MMV, RYC-2015-18368).Peer reviewe

New constraints on elemental and Pb and Nd isotope compositions of South American and Southern African aerosol sources to the South Atlantic Ocean

Improving the geochemical database available for characterising potential natural and anthropogenic aerosol sources from South America and Southern Africa is a critical precondition for studies aimed at understanding trace metal controls on the marine biogeochemical cycles of the South Atlantic Ocean. We here present new elemental and isotopic data for a wide range of sample types from South America and Southern Africa that are potentially important aerosol sources. This includes road dust from Buenos Aires and lichen samples from Johannesburg, soil dust from Patagonia, volcanic ash from the Andean volcanic belt, and aerosol samples from São Paulo. All samples were investigated for major (Al, Ca, Fe, Mg, Na, K, Mn) and trace element (Cd, Co, Cr, Cu, Ni, Pb, REE, Sc, Th, Y, V, Zn) concentrations and Nd and Pb isotopic compositions. We show that diagrams of 208Pb/207Pb vs. εNd, 208Pb/207Pb vs. Pb/Al, 1/[Pb], Zn/Al, Cd/Al, Cu/Al, and εNd vs. Pb/Al, and 1/[Nd] are best suited to separate South American and South African source regions as well as natural and anthropogenic sources. A subset of samples from Patagonia and the Andes was additionally subjected to separation of a fine (<5 μm) fraction and compared to the composition of the bulk sample. We show that differences in the geochemical signature of bulk samples between individual regions and source types are significantly larger than between grain sizes. Jointly, these findings present an important step forward towards a quantitative assessment of aeolian trace metal inputs to the South Atlantic Ocean

Simulación de los efectos que causan la inclusión de pastos mejorados y los cambios en la estrategia de parición anual, sobre la producción de leche en una vaquería comercial.

The work aims to solve the current problem about low milk production and poor efficiency of this process through a group of simulations performed with different% of animals giving birth at the beginning of the dry period and spring with a minimum of expenses and with an improvement of the grazing-forage areas of a commercial dairy farm to define possible bio-economic responses of these combinations and propose the best solution as part of a possible development plan to the management of this entity, this study was carried out carried out in the Asilo production unit belonging to the Florida Livestock Company, located in the municipality of Florida in the province of Camagüey, Cuba where yields and botanical composition of the dairy areas were studied for the whole year, which together with other indicators, it was considered for the execution of an Ex – before analysis, the indicators of milk efficiency obtained They come from the simulation, they approached the potential of this herd in the conditions studied, and demonstrate the possibilities of responses if the partition patterns and the forage base of the farm are improved, the best dairy efficiency results were achieved with 70 and 90% of paritions concentrated at the beginning of the rainy period, with the highest production rates per hectare and by units of work and the best profitability on working capital with values ​​of 63 and 61.3% respectively (249)El trabajo tiene como objetivo dar solución a la problemática actual sobre la baja producción de leche y pobre eficiencia de este proceso a través de un grupo de simulaciones realizadas con diferentes % de animales pariendo a inicios del periodo seco y de la primavera con un mínimo de gastos y con una mejora de las áreas de pastoreo-forraje de una vaquería comercial para definir posibles respuestas bio-económicas de estas combinaciones y proponer la mejor solución como parte de un posible plan de desarrollo a la dirección de esta entidad, este estudio se llevó a cabo en la unidad de producción Asilo perteneciente a la Empresa Pecuaria Florida, ubicada en el municipio de Florida en la provincia de Camagüey, Cuba donde se estudiaron los rendimientos y la composición botánica de las áreas de la vaquería para todo el año, lo cual junto a otros indicadores permitió considerarlo para la ejecución de un análisis Ex–antes, los indicadores de eficiencia láctea que se obtienen de la simulación, se acercaron al potencial de este rebaño en las condiciones estudiadas, y demuestran las posibilidades de respuestas si se mejoran los patrones de parición y la base forrajera de la finca, los mejores resultados de eficiencia láctea se alcanzaron con el 70 y 90% de pariciones concentrada al inicio del periodo lluvioso, con los máximos índices de producción por hectáreas y por unidades de trabajo y la mejor rentabilidad sobre el capital de operaciones con valores de 63 y 61.3% respectivamente (249

Towards the development of agent-based organizations through MDD

Electronic version of an article published as International Journal on Artificial Intelligence Tools, 22, 2, 2013, DOI 10.1142/S0218213013500024 © World Scientific Publishing Company http://www.worldscientific.com/worldscinet/ijaitVirtual Organizations are a mechanism where agents can demonstrate their social skills since they can work in a cooperative and collaborative way. Nonetheless, the development of organizations using Multi-Agent Systems (MAS) requires extensive experience in different methodologies and platforms. Model-Driven Development (MDD) is a technique for generating application code that is developed from basic models and meta-models using a variety of automatic transformations. This paper presents an approach to develop and deploy organization-oriented Multi-Agent Systems using a model-driven approach. Based on this idea, we introduce a relatively generic agent-based meta-model for a Virtual Organization, which was created by a comprehensive analysis of the organization-oriented methodologies used in MAS. Following the MDD approach, the concepts and relationships obtained were mapped into two different platforms available for MAS development, allowing the validation of our proposal. In this way, the resultant approach can generate Virtual Organization deployments from unified meta-models, facilitating the development process of agent-based software from the user point of view.This work was partially supported by TIN2009-13839-C03-01 and PROMETEO/2008/051 projects of the Spanish government and CONSOLIDER-INGENIO 2010 under grant CSD2007-00022.Agüero, J.; Carrascosa Casamayor, C.; Rebollo Pedruelo, M.; Julian Inglada, VJ. (2013). Towards the development of agent-based organizations through MDD. International Journal on Artificial Intelligence Tools. 22(2):1-34. https://doi.org/10.1142/S0218213013500024S134222Argente, E., Julian, V., & Botti, V. (2006). Multi-Agent System Development Based on Organizations. Electronic Notes in Theoretical Computer Science, 150(3), 55-71. doi:10.1016/j.entcs.2006.03.005Bézivin, J. (2005). On the unification power of models. Software & Systems Modeling, 4(2), 171-188. doi:10.1007/s10270-005-0079-0Bresciani, P., Perini, A., Giorgini, P., Giunchiglia, F., & Mylopoulos, J. (2004). Tropos: An Agent-Oriented Software Development Methodology. Autonomous Agents and Multi-Agent Systems, 8(3), 203-236. doi:10.1023/b:agnt.0000018806.20944.efFoster, I., Kesselman, C., & Tuecke, S. (2001). The Anatomy of the Grid: Enabling Scalable Virtual Organizations. The International Journal of High Performance Computing Applications, 15(3), 200-222. doi:10.1177/109434200101500302Hahn, C., Madrigal-Mora, C., & Fischer, K. (2008). A platform-independent metamodel for multiagent systems. Autonomous Agents and Multi-Agent Systems, 18(2), 239-266. doi:10.1007/s10458-008-9042-0HORLING, B., & LESSER, V. (2004). A survey of multi-agent organizational paradigms. The Knowledge Engineering Review, 19(4), 281-316. doi:10.1017/s0269888905000317Huhns, M. N., & Singh, M. P. (2005). Service-oriented computing: key concepts and principles. IEEE Internet Computing, 9(1), 75-81. doi:10.1109/mic.2005.21Huhns, M. N., Singh, M. P., Burstein, M., Decker, K., Durfee, E., Finin, T., … Zavala, L. (2005). Research Directions for Service-Oriented Multiagent Systems. IEEE Internet Computing, 9(6), 65-70. doi:10.1109/mic.2005.132Kolp, M., Giorgini, P., & Mylopoulos, J. (2006). Multi-Agent Architectures as Organizational Structures. Autonomous Agents and Multi-Agent Systems, 13(1), 3-25. doi:10.1007/s10458-006-5717-6OHTANI, T., CASE, S., AZARMI, N., & THINT, M. (2002). AN INTELLIGENT SYSTEM FOR MANAGING AND UTILIZING INFORMATION RESOURCES OVER THE INTERNET. International Journal on Artificial Intelligence Tools, 11(01), 117-138. doi:10.1142/s0218213002000800Omicini, A., Ricci, A., & Viroli, M. (2005). RBAC for Organisation and Security in an Agent Coordination Infrastructure. Electronic Notes in Theoretical Computer Science, 128(5), 65-85. doi:10.1016/j.entcs.2004.11.045Papazoglou, M. P., & Georgakopoulos, D. (2003). Introduction. Communications of the ACM, 46(10), 24. doi:10.1145/944217.944233Papazoglou, M. P., Traverso, P., Dustdar, S., & Leymann, F. (2007). Service-Oriented Computing: State of the Art and Research Challenges. Computer, 40(11), 38-45. doi:10.1109/mc.2007.400Selic, B. (2003). The pragmatics of model-driven development. IEEE Software, 20(5), 19-25. doi:10.1109/ms.2003.1231146SKARMEAS, N. P., & CLARK, K. L. (2002). COMPONENT BASED AGENT CONSTRUCTION. International Journal on Artificial Intelligence Tools, 11(01), 139-163. doi:10.1142/s0218213002000812Zambonelli, F., Jennings, N. R., & Wooldridge, M. (2003). Developing multiagent systems. ACM Transactions on Software Engineering and Methodology, 12(3), 317-370. doi:10.1145/958961.95896

Efectos de partos ocurridos alrededor del inicio de la época lluviosa sobre indicadores de eficiencia. I. Producción de leche

The objective of this study was to evaluate seasonal calving effect on milk production at the beginning of the rainy season in Camagüey province. Commercial dairy herds were assessed during four periods with 68 % of annual seasonal calvings. Each period comprised five months, i. e., March-July, April-August, May-September, and JuneOctober. Variables measured were milk production per dairy cow, milk production per work unit, milk production per hectare, and annual total milk production. The statistical method used was a covariance analysis. The best seasonal calving period was April-August (P &lt; 0,05) with the higher scores for the studied variables: milk production per dairy cow (4,5 ± 0,14 kg), milk production per hectare (1 281 ± 15,8 kg), milk production per work unit (33 383 ± 11 kg), and annual total milk production (139 417 ± 291 kg). Therefore, efficiency of dairy stock systems improves during the April-August period. Further studies on beef production under different environmental conditions are recommended.Con el objetivo de evaluar el efecto del período de los partos ocurridos alrededor del inicio del período lluvioso, sobre la producción de leche de rebaños comerciales en Camagüey, Cuba, se estudiaron cuatro períodos de cinco meses cada uno (marzo-julio, abril-agosto, mayo-septiembre y junio-octubre) con más de un 68 % de los partos del año. Se midieron las variables: producción de leche por vaca, unidad de trabajo, hectárea y total. Como método estadístico se utilizó un análisis de covarianza y se determinó que el mejor período de ocurrencia de los partos fue abrilagosto (P &lt; 0,05), con los mejores resultados en producción de leche por vaca (4,5 ± 0,14 kg), hectárea (1 281 ± 15,8 kg), unidad de trabajo (33 383 ± 11 kg) y el total anual (139 417 ± 291 kg). Se concluye que en el período abril-agosto mejora la eficiencia de los sistemas vacunos lecheros, por lo que se recomienda extender el estudio hacia otras condiciones ambientales de producción vacuna