Crossing regions for supersonic cones

The original study of a conical body of circular cross section at zero angle of attack inside a supersonic flow was developed by Taylor & Maccoll 1933, see [1]. After this year a large amount of numerical and perturbation techniques were developed to approximate solutions and to deal with the problem.www.proceedings.blucher.com.br/evento/10wccmFil: Ferreyra, R. T. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Matemática; Argentina.Fil: Tamagno, J. P. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Aeronaútica; Argentina.Otras Ingenierías y Tecnología

Orbital images of high resolution and their role in the study of the matter state in lunar craters

Fil: Shpekin, M. I. Kazan Federal University; Rusia.Fil: Ferreyra, R. T. Universidad Nacional de Córdoba; Argentina.Fil: Mukhametshin, Ch. R. Kazan Federal University; Rusia.Fil: Semenov, A. A. Kazan Federal University; Rusia.Fil: Rysayev, T. F. Kazan Federal University; Rusia.The concept of high and super-high resolution came into use since the LRO mission. The images with a resolution of 10-20 meters on the lunar surface began to refer to the high resolution and images with a resolution of 1-2 meters - to the super-high. So images of the spacecrafts "Apollo-15, -16, -17" metric cameras are included in the group of high-resolution, and images of the same spacecrafts, obtained by panoramic cameras, are super-high resolution images. As for the unique «LRO» images, it is necessary to emphasize the experimental survey from low orbit, when the resolution reaches two feet on the lunar surface. This is not just a low-orbit, but it was a risky orbit, taking into account the elevation changes on the Moon, which is comparable to an orbital altitude of 25 km.http://ms2016.cosmos.ruFil: Shpekin, M. I. Kazan Federal University; Rusia.Fil: Ferreyra, R. T. Universidad Nacional de Córdoba; Argentina.Fil: Mukhametshin, Ch. R. Kazan Federal University; Rusia.Fil: Semenov, A. A. Kazan Federal University; Rusia.Fil: Rysayev, T. F. Kazan Federal University; Rusia.Astronomía (incluye Astrofísica y Ciencias del Espacio

Determination of the mating system of tucumã palm using microsatellite markers.

A palmeira Astrocaryum aculeatum produz frutos comestíveis, utilizados na alimentação por populações indígenas, tradicionais e urbanas. Esta espécie é incipientemente domesticada e pouco estudada apesar de sua importância econômica para pequenos produtores e extrativistas. Estudos do sistema reprodutivo são necessários para conservação e uso dos recursos genéticos da espécie. O objetivo foi estimar parâmetros do sistema reprodutivo do tucumã-do-Amazonas usando marcadores microssatélites

Propiedades emulsificantes y espumantes de las proteínas de harina de cacahuate (Arachis hypogaea Lineau)

The functional properties of proteins present in peanut (Arachis hypogaea Lineau) flour were studied. The influence of the pH and protein solubility on emulsifying and foaming properties of peanut flour was evaluated. The isoelectric point (Ip) of these proteins was found at the pH of 4,0; and the isoelectric region between pH 3,0 and 5,0. The evaluated surface properties decreased in the isolectric region. The emulsifying activity and time stability (30 and 120 minutes) significantly decreased at the pI; the emulsifying stability at the temperature of 80°C decreased in all the isoelectric region until the pH of 6,0. The foaming activity had the best values at the pH of 2,0. The correlation between protein solubility and surface properties were more significant for emulsifying properties than for foaming properties.Se estudiaron las propiedades funcionales de las proteínas presentes en la harina de cacahuate (Arachis hypogaea Lineau). Fue evaluada la influencia que tienen el pH y la solubilidad proteica sobre las propiedades emulsificantes y espumantes de las proteínas de harina de cacahuate. El punto isoeléctrico (pI) de estas proteínas se encuentra a pH 4,0; mientras que la región isoeléctrica está entre los valores de pH de 3,0 y 5,0. Las propiedades de superficie evaluadas disminuyeron en la región isoeléctrica, siendo que la actividad emulsificante y la estabilidad emulsificante en los tiempos de 30 y 120 minutos disminuyeron fuertemente en el pI; las estabilidades emulsificantes en relación a la temperatura (80 ºC) diminuyeron en toda la región isoeléctrica extendiéndose hasta el pH 6,0. La actividad espumante mostró sus mejores valores a pH 2,0. Las correlaciones entre la solubilidad protéica y las propiedades de superficie fueron más importantes para las propiedades emulsificantes que para las espumantes

Morphology and allometry of juvenile açaí palms under cultivation conditions in Central Amazonia.

Two Amazonian species of açaí palm trees (Euterpe oleracea and Euterpe precatoria) are exploited in the commercial production of açaí pulp or juice. While E. oleracea benefits from developed cultivation technologies, E. precatoria lacks such advancements. Studies on the morphology and development of açaí palms under cultivation conditions can contribute to increasing the productivity of the species. The aim of this study was to carry out morphological characterization, assess growth and development in the juvenile phase of the plants, and obtain allometric models for E. precatoria and E. oleracea

Prediction of geographic distribution and ecological niche modeling of açaí palm trees in the Amazon.

Euterpe precatoria Mart. (açaí-do-amazonas) and Euterpe oleracea Mart. (açaí-do-pará) are palm trees of socioeconomic importance to Brazil, and fruit demand has increased due to its nutritional characteristics. This study aimed to evaluate the effect of global climate change on the current geographic distribution of E. precatoria and E. oleracea and in future climate scenarios using the ecological niche modeling in the scope of Brazilian territories. Predição de distribuição geográfica e modelagem de nicho ecológico de açaizeiros na Amazônia: Euterpe precatoria Mart. (açaí-do-amazonas) e Euterpe oleracea Mart. (açaí-do-pará) são palmeiras de importância socioeconômica para o Brasil, e a demanda por frutos vem aumentando devido às suas características nutricionais. Objetivou-se avaliar o efeito das mudanças climáticas globais na distribuição geográfica atual de E. precatoria e E. oleracea e em cenários climáticos futuros, por meio de modelagem de nicho ecológico, nos âmbitos dos territórios brasileiros

Climate change impact on the distribution of forest species in the Brazilian Amazon.

Studies using ecological niche models highlight the vulnerability of forest species to climate change. This work aimed to analyze the distribution of timber species Aspidosperma desmanthum, Cariniana micranta, Clarisia racemosa, Couratari oblongifolia, and Vouchysia guianensis, which are targets of deforestation, to predict the impacts of climate change and identify areas for their conservation in the Amazon. For this purpose, 37 environmental variables were used, including climatic and edaphic factors. The models were fitted using five algorithms, and their performance was evaluated by the metrics Area Under the Curve (AUC), True Skill Statistic, and Sorensen Index. The deforestation analysis was conducted using data accumulated over a period of 14 years. The study indicated that under the most pessimistic predictions, considering continued high emissions of greenhouse gases (GHGs) from the use of fossil fuels, SSP5–8.5, potential habitat loss for the studied species was more significant. Analyses of the species show that the Western Amazon has a greater climatic suitability area for the conservation of its genetic resources. Further study of the accumulated deforestation over 14 years showed a reduction in area for all species. Therefore, in situ conservation policies and deforestation reduction are recommended for the perpetuation of the analyzed forest species

Mating system analysis and genetic diversity of Parkia multijuga Benth. one native tree Species of the Amazon.

The Amazonian native tree species Parkia multijuga has potential silvicultural characteristics that can be utilized to productive plantations. Understanding its mating system is necessary to delineate the methods for the breeding of the species, the collection of seeds for conservation, and the use of seedlings for production plantations. The aim of this study is to evaluate the mating system and population genetic diversity of P. multijuga, using molecular markers

Diversidade genética de genótipos de Coffea canephora com o uso de marcadores microssatélites.

A cafeicultura na Amazônia Ocidental é realizada principalmente com cultivares de café da espécie Coffea canephora. A produção de café no Amazonas tem aumentado em volume e em qualidade. A UFAM e Embrapa Rondônia realizam pesquisas com clones de Coffea canephora, visando identificar os genótipos melhor adaptados ao Amazonas, contribuindo assim para o desenvolvimento sustentável da atividade. O objetivo desta pesquisa foi avaliar a diversidade genética de genótipos de C. canephora do programa de melhoramento da Embrapa Rondônia utilizando marcadores microssatélites.XXXII CONIC

Conservação e cultivo de plantas ornamentais em quintais do Amazonas.

Trata-se de uma pesquisa de cunho qualitativo e quantitativo, onde foi levado em consideração o senso comum em relação ao uso das plantas ornamentais. O formulário foi aplicado em 40 residências entre os municípios de Tabatinga, Manacapuru, Manaus, Humaitá e Parintins no período de 2022 a 2023. Os participantes foram escolhidos de acordo com a exuberância de seus quintais. Os resultados apresentaram 35 espécies encontradas, sendo as mais frequentes nos cinco municípios, as espécies: babosa [Aloe vera (L.) Burm. f.], espada-de-são-jorge [Sansevieria trifasciata (S.) trifasciata], coroa-de-cristo [Euphorbia milii (Des) Moulins], rosa do deserto [Adenium obesu (Forssk.) Roem. & Schult.] e vinca [Catharanthus roseus (L.) G. Don]