Diagnóstico e prioridades de pesquisa em agricultura irrigada: região Sul.

Estado da arte da agricultura irrigada na região Sul; Prioridades da pesquisa em agricultura irrigada na região Sul; Produção agrícola e respectivas áreas colhidas na região Sul.bitstream/item/43721/1/Diagnostico-e-prioridades-regiao-sul.pd

Diagnóstico e prioridades de pesquisa em agricultura irrigada: Região Norte.

Região da arte da agricultura irrigada na região norte; Prioridades de pesquisa em agricultura irrigada para a região norte.bitstream/item/43728/1/Diagnostico-e-prioridades-regiao-norte.pd

Diagnóstico e prioridades de pesquisa em agricultura irrigada: região Centro-Oeste.

Estudo da arte da agricultura irrigada na região Centro-Oeste; Prioridades de pesquisa em agricultura irrigada para a região Centro-Oeste.bitstream/item/43722/1/Diagnostico-e-prioridades-regiao-coeste.pd

Diagnostico e prioridades de pesquisa em agricultura irrigada: Região Nordeste.

Irrigação em: Maranhão, Piauí, Ceara, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, Sergipe, Bahia.bitstream/item/43731/1/Diagnostico-e-prioridades-regiao-nordeste.pd

Protective effects of Amburoside A, a phenol glucoside from Amburana cearensis, against CCl4-induced hepatotoxicity in rats.

The aim of this study was to investigate the possible beneficial effects of amburoside A, AMB [4-(0-b-d-glycopyranosyl) benzyl protocatechoate], against carbon tetrachloride (CCl) toxicity in rats

Herbicide combinations to control the weed seedbank in an upland cotton field.

An experiment was conducted in dryland conditions of the Brazilian Northeast to determine the number of viable weed seeds (seedbank) in an upland cotton crop, and its distribution in the soil profile, before and after using various herbicide treatments. A randomized block design in a split-plot block scheme with 6 replications was used, where the main plots were constituted by a factorial (13 treatments and 2 sampling soil depths), and the subplots by 2 sampling dates. The seedbank was determined by germination of the recovered weed seeds obtained from different soil depths. The highest number of viable weed seeds in the area was found before the application of the herbicide treatments at 0 - 10 cm soil depth. The treatments metalachlor + diuron; diuron + pendimethalin and the control (no herbicide treatment, weeded weekly during the entire cotton crop cycle) were the most effective in reducing the weed seedbank in the area

Composição florística de plantas daninhas em área cultivada com algodoeiro herbáceo, submetida a diferentes tratamentos herbicídicos.

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Approaches in biotechnological applications of natural polymers

Natural polymers, such as gums and mucilage, are biocompatible, cheap, easily available and non-toxic materials of native origin. These polymers are increasingly preferred over synthetic materials for industrial applications due to their intrinsic properties, as well as they are considered alternative sources of raw materials since they present characteristics of sustainability, biodegradability and biosafety. As definition, gums and mucilages are polysaccharides or complex carbohydrates consisting of one or more monosaccharides or their derivatives linked in bewildering variety of linkages and structures. Natural gums are considered polysaccharides naturally occurring in varieties of plant seeds and exudates, tree or shrub exudates, seaweed extracts, fungi, bacteria, and animal sources. Water-soluble gums, also known as hydrocolloids, are considered exudates and are pathological products; therefore, they do not form a part of cell wall. On the other hand, mucilages are part of cell and physiological products. It is important to highlight that gums represent the largest amounts of polymer materials derived from plants. Gums have enormously large and broad applications in both food and non-food industries, being commonly used as thickening, binding, emulsifying, suspending, stabilizing agents and matrices for drug release in pharmaceutical and cosmetic industries. In the food industry, their gelling properties and the ability to mold edible films and coatings are extensively studied. The use of gums depends on the intrinsic properties that they provide, often at costs below those of synthetic polymers. For upgrading the value of gums, they are being processed into various forms, including the most recent nanomaterials, for various biotechnological applications. Thus, the main natural polymers including galactomannans, cellulose, chitin, agar, carrageenan, alginate, cashew gum, pectin and starch, in addition to the current researches about them are reviewed in this article.. }To the Conselho Nacional de Desenvolvimento Cientfíico e Tecnológico (CNPq) for fellowships (LCBBC and MGCC) and the Coordenação de Aperfeiçoamento de Pessoal de Nvíel Superior (CAPES) (PBSA). This study was supported by the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UID/BIO/04469/2013 unit, the Project RECI/BBB-EBI/0179/2012 (FCOMP-01-0124-FEDER-027462) and COMPETE 2020 (POCI-01-0145-FEDER-006684) (JAT)