275 research outputs found
Medicamentos de dispensação excepcional: histórico e gastos do Ministério da Saúde do Brasil
Brazilian solar saltworks - ancient uses and future possibilities
Coastal solar saltworks of Brazil are exploited for sea salt, which becomes progressively concentrated by evaporation. This study aimed to review the current and new potential uses of these systems, in order to provide more dynamic for this activity. The first evaporation ponds are also used for artisanal fisheries, ensuring the livelihood of many families. All the brine rich in secondary salts (bittern) can be widely used by the chemical industry, while the Brazil shows an incipient production of "flower of salt", a salt with distinct characteristics with higher market value than sodium chloride. On the other hand, the saltponds have a high potential for management and obtaining of large populations of Artemia spp., purifying the brine through the action as biological filter. This microcrustacean occurs naturally in intermediate salinity ponds, being commonly used in aquaculture. Species of microalgae and halobacteria found in the saltworks are employed for extraction of beta-carotene and glycerol, used in an extensive list of products with high commercial value. These ecosystems represent refuge zones for many species of migratory birds, becoming imperative to promote the conservation of these hypersaline wetlands
Climate change and outdoor regional living plant collections: an example from mainland Portugal
Original PaperClimate change threatens not only plant species occurring naturally, but also
impacts on regional living plant collections, which play an important role in ex situ
conservation strategies. In the last few years, several global circulation models have been
used to predict different global climate change scenarios. Due to their coarse resolutions,
and while more detailed regional approaches are not available, downscaling techniques
have been proposed, as a very simple first approach to increase detail. We analysed seven
sites on mainland Portugal with potential for species conservation (four botanic gardens
and three universities), in the light of downscaled climate change scenarios, using an
environmental envelope approach and a predefined bioclimatic neighbourhood for each
site. Thresholds for the bioclimatic neighbourhood were based on Rivas-Martı´nez’s Bioclimatic
Classification of the Earth. For each site, the expected geographical shift of its
original bioclimatic neighbourhood (1950–2000) was mapped for 2020, 2050 and 2080.
Analysing those shifts enabled us to delineate knowledge-transfer paths between sites,
according to the analysed scenarios. We concluded that, according to the Intergovernmental
Panel on Climate Change A2 scenario, all considered sites will be outside the
predefined bioclimatic neighbourhood by 2080, while according to the B2 scenario all of
them will be inside that neighbourhood, although sometimes marginally so. Therefore, the
implementation of global sustainability measures as considered in the B2 scenario family
can be of great importance in order to delay significantly the impacts of climate change,
giving extra time for the adaptation of the outdoor regional living plant collectionsinfo:eu-repo/semantics/publishedVersio
Immune response of calves inoculated with proteins ofAnaplasma marginale bound to an immunostimulant complex
Effect of rare earth oxide additions on oxidation behavior of AISI 304L stainless steel
Cultural keystone species of fauna as a method for assessing conservation priorities in a Protected Area of the Brazilian semiarid
Thermographic and anthropometric assessment of electrical stimulation on localized body fat
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