Produtividade e qualidade do melão em função da cobertura do solo no Vale do São Francisco.

Suplemento. Edição dos Trabalhos do 49 Congresso Brasileiro de Olericultura, Águas de Lindóia, ago. 2009

Planejamento fatorial aplicado à digestão de arroz assistida por radiação microondas.

Os principais parâmetros que influenciam a digestão são: volume de ácido e tempo. O primeiro é importante na espectrometria atômica para a vida útil do equipamento. Com esta preocupação e com o intuito de gerar menos resíduos, avaliou-se se a diminuição do volume de ácido utilizado manteria a mesma eficiência na digestão, bem como o uso de tempo reduzido

Avaliação da reprodução de Crotalaria spectabilis e C. juncea.

Os adubos verdes têm grande importância uma vez que melhoram a qualidade do solo, reduzindo sua compactação e aumentando a infiltração de água; evitam a erosão; reciclam nutrientes; aumentam a diversidade de microrganismos; auxiliam no controle de plantas invasoras, contribuindo para o rendimento de culturas. Dentre eles, destacam-se as espécies de Crotalaria por serem muito adaptadas a solos de reduzida fertilidade. O objetivo deste trabalho foi contribuir para o conhecimento da reprodução dessas leguminosas

Qualidade nutricional e armazenamento de variedades de feijão-caupi cultivados no Juruá, Acre.

O objetivo desta pesquisa foi avaliar a qualidade nutricional de variedades de feijão-caupi (Vigna unguiculata) cultivados no Acre em função de embalagens e tempo de armazenamento. Amostras de oito variedades de feijão-caupi das safras 2020 e 2021 contendo 250g de grãos foram coletadas em Marechal Thaumaturgo, Acre. As amostras foram identificadas nos tratamentos: embalagem a vácuo, silo bolsa, embalagem tradicional no tempo zero e apóS 12 meses de armazenamento sendo submetidas às análises de biometria, massa de 100 grãos, umidade, proteína, cinzas, lipídios, fibras, carboidratos, valor energético, teores de antocianinas e coloração. O delineamento utilizado foi inteiramente casualizado com três repetições por variedade. Os grãos de feijão-caupi testados diferem entre si em tamanho, massa de 100 grãos, em todos os constituintes nutricionais e coloração mostrando alta variabilidade genética. Os feijões de cor clara não apresentaram antocianinas enquanto a variedade Preto de Praia foi aquela que apresentou maior teor de antocianinas. O armazenamento dos grãos por 12 meses não alterou as propriedades nutricionais, entretanto ocorreu o escurecimento dos grãos em variedades de cor clara nas três embalagens analisadas. A embalagem a vácuo foi aquela que preservou melhor a cor e os teores de antocianinas das amostras de feijão-caupi coloridas e pretas. The objective of this research was to evaluate the nutritional quality of varieties of cowpea (Vigna unguiculata) grown in Acre as a function of packaging and storage time. Samples of eight varieties of cowpea from the 2020 and 2021 harvests containing 250 g of grains were collected in Marechal Thaumaturgo, Acre. The samples were identified in the treatments: vacuumpackaging, silo bag, traditional packaging at zero time and after 12 months of storage being submitted to biometry analysis, mass of 100 grains, moisture, protein, ash, lipids, fibers, carbohydrates, value energy, anthocyanin contents and color. The design used was completely randomized with three replications per variety. The cowpea grains tested differ among themselves in size, mass of 100 grains, in all nutritional constituents and in color, showing high genetic variability. Light-colored beans did not have anthocyanins, while the Preto de Praia variety had the highest anthocyanin content. Grain storage for 12 months did not alter the nutritional properties, however grain darkening occurred in light-colored varieties in the three packages analyzed. Vacuum packing was the one that best preserved the color and anthocyanin contents of the colored and black cowpea samples

Anti-band 3 and anti-spectrin antibodies are increased in Plasmodium vivax infection and are associated with anemia.

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Study of the plutino object (208996) 2003 AZ84 from stellar occultations: size, shape and topographic features

We present results derived from four stellar occultations by the plutino object (208996) 2003~AZ$_{84}$, detected at January 8, 2011 (single-chord event), February 3, 2012 (multi-chord), December 2, 2013 (single-chord) and November 15, 2014 (multi-chord). Our observations rule out an oblate spheroid solution for 2003~AZ$_{84}$'s shape. Instead, assuming hydrostatic equilibrium, we find that a Jacobi triaxial solution with semi axes $(470 \pm 20) \times (383 \pm 10) \times (245 \pm 8)$~km % axis ratios $b/a= 0.82 \pm 0.05$ and $c/a= 0.52 \pm 0.02$, can better account for all our occultation observations. Combining these dimensions with the rotation period of the body (6.75~h) and the amplitude of its rotation light curve, we derive a density $\rho=0.87 \pm 0.01$~g~cm$^{-3}$ a geometric albedo $p_V= 0.097 \pm 0.009$. A grazing chord observed during the 2014 occultation reveals a topographic feature along 2003~AZ$_{84}$'s limb, that can be interpreted as an abrupt chasm of width $\sim 23$~km and depth $> 8$~km or a smooth depression of width $\sim 80$~km and depth $\sim 13$~km (or an intermediate feature between those two extremes)

Laboratory-induced endolithic growth in calcarenites: biodeteriorating potential assessment

This study is aimed to assess the formation of photosynthetic biofilms on and within different natural stone materials, and to analyse their biogeophysical and biogeochemical deterioration potential. This was performed by means of artificial colonisation under laboratory conditions during 3 months. Monitoring of microbial development was performed by image analysis and biofilm biomass estimation by chlorophyll extraction technique. Microscopy investigations were carried out to study relationships between microorganisms and the mineral substrata. The model applied in this work corroborated a successful survival strategy inside endolithic microhabitat, using natural phototrophic biofilm cultivation, composed by cyanobacteria and algae, which increased intrinsic porosity by active mineral dissolution. We observed the presence of mineral-like iron derivatives (e.g. maghemite) around the cells and intracellularly and the precipitation of hausmannite, suggesting manganese transformations related to the biomineralisation.Fundação para a Ciência e a Tecnologia (FCT

Comparative LCA of concrete with recycled aggregates: a circular economy mindset in Europe

[EN] Purpose Construction and demolition waste (C&DW) is the largest waste stream in the European Union (EU) and all over the world. Proper management of C&DW and recycled materials¿including the correct handling of hazardous waste¿can have major benefits in terms of sustainability and the quality of life. The Waste Framework Directive 2008/98/EC aims to have 70% of C&DW recycled by 2020. However, except for a few EU countries, only about 50% of C&DW is currently being recycled. In the present research, the environmental impact of concrete with recycled aggregates and with geopolymer mixtures is analysed. The aim of the present research is to propose a comparative LCA of concrete with recycled aggregates in the context of European politics. Methods Life cycle assessment (LCA) methodology is applied using Simapro© software. A cradle to grave analysis is carried out. The results are analysed based on the database Ecoinvent 3.3 and Impact 2002+. Results Results show that the concrete with 25% recycled aggregates is the best solution from an environmental point of view. Furthermore, geopolymer mixtures could be a valid alternative to reduce the phenomenon of ¿global warming¿; however, the production of sodium silicate and sodium hydroxide has a great environmental impact. Conclusions A possible future implementation of the present study is certainly to carry out an overall assessment and to determine the most cost-effective option among the different competing alternatives through the life cycle cost analysis.Colangelo, F.; Gómez-Navarro, T.; Farina, I.; Petrillo, A. (2020). Comparative LCA of concrete with recycled aggregates: a circular economy mindset in Europe. International Journal of Life Cycle Assessment. 25(9):1790-1804. https://doi.org/10.1007/s11367-020-01798-6S17901804259Akhtar A, Sarmah (2018) Construction and demolition waste generation and properties of recycled aggregate concrete: a global perspective. 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J Clean Prod 184:815–825Braga AM, Silvestre JD, de Brito J (2017) Compared environmental and economic impact from cradle to gate of concrete with natural and recycled coarse aggregates. J Clean Prod 162:529–543Chen C, Habert G, Bouzidi Y, Jullien A, Ventura A (2010) LCA allocation procedure used as an incitative method for waste recycling: an application to mineral additions in concrete. Res Con Rec 54(12):1231–1240Chen Z, Gu H, Bergman RD, Liang S (2020) Comparative life-cycle assessment of a high-rise mass timber building with an equivalent reinforced concrete alternative using the Athena impact estimator for buildings. Sustainability (Switzerland) 12(11):4708Colangelo F, Cioffi R (2017) Mechanical properties and durability of mortar containing fine fraction of demolition wastes produced by selective demolition in South Italy. 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A social and ecological assessment of tropical land uses at multiple scales: the Sustainable amazon network

Science has a critical role to play in guiding more sustainable development trajectories. Here, we present the Sustainable Amazon Network (Rede Amazônia Sustentável, RAS): a multidisciplinary research initiative involving more than 30 partner organizations working to assess both social and ecological dimensions of land-use sustainability in eastern Brazilian Amazonia. The research approach adopted by RAS offers three advantages for addressing land-use sustainability problems: (i) the collection of synchronized and co-located ecological and socioeconomic data across broad gradients of past and present human use; (ii) a nested sampling design to aid comparison of ecological and socioeconomic conditions associated with different land uses across local, landscape and regional scales; and (iii) a strong engagement with a wide variety of actors and non-research institutions. Here, we elaborate on these key features, and identify the ways in which RAS can help in highlighting those problems in most urgent need of attention, and in guiding improvements in land-use sustainability in Amazonia and elsewhere in the tropics. We also discuss some of the practical lessons, limitations and realities faced during the development of the RAS initiative so far