The influence of landscape on the spatial and temporal distribution of stream macroalgal communities of two types of subtropical biomes

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

The roles of environmental conditions and spatial factors in controlling stream macroalgal communities

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Taxonomic assessment and enzymes production by yeasts isolated from marine and terrestrial Antarctic samples

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Aspectos técnico, econômicos e ecológicos de processos de produção de hidrogênio

Pós-graduação em Engenharia Mecânica - FEG

Desempenho de Ankistrodesmus gracilis (Reischi) Korsikov (Chlorophyta) cultivada em três meios de cultura em laboratório

Pós-graduação em Aquicultura - FCAV

Impact of the Textile Dye Acid Blue 40 on the Periphyton of a Simulated Microecosystem

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Ultrasonic waves: Bioeffects on yeast cells

Applications of ultrasound were starting from 1912 with the primary objective the detection of icebergs on prevention of maritime accidents. Algae, fish deaths and destruction were observed in the vicinity of sonar that equipped ships and submarines during the First World War.The evolutions of research and studies with ultrasound have big advances following the discovery of piezoelectric transducers in science and technology. As an example we can mention its application in microsurgery, fatigue detection in aerospace mechanics, catalysis sonochemical, biotechnology and others.The work presented here aims to demonstrate the application of ultrasonic in pulsed mode beams in biotechnology with the aim of improving the fermentation of a culture broth containing biological agents. In these experiments we used as ultrasound equipment and oscilator Sonics VCX-600 (20KHz), probe type wave guide. The experiments were conducted in a glass reactor of 200 mL of biomaterial containing cane juice and Saccharomyces cerevisiae in suspension. The parameters analyzed were related to the content Alcohlic (FID gas chromatography), and cell viability (Neubauer chamber), TRS (refractometry). Analysis of results showed that the total production exceeded in irradiated samples compared to normal fermentation (without ultrasound), suggesting additional advantage of ultrasound activation. Lastin Trials 1400 min, showed ethanol production systems 12% more than non-enabled systems. In this context alternatives for ethanol production, bio fuel and many other byproducts of the alcohol industries and chemicals could benefit from the use of ultrasound beams in this range of frequencies.

Clypeina tibanai, sp. nov. (Polyphysacea, Dasycladales, Chlorophyta), mid-Cretaceous green alga from the Potiguar Basin, Brazilian margin of the young South Atlantic Ocean

The fossil genus Clypeina (Michelin, 1845) comprises some 40 species. We describe Clypeina tibanai, a new species from ? upper Albian-Cenomanian strata of the Potiguar Basin, Brazil, characterised by closely set verticils of tubular, bended laterals. It is compared with Clypeina hanabataensis Yabe & Toyama, 1949, a Late Jurassic species, and with Pseudoactinoporella fragilis (Conrad, 1970), an Early Cretaceous taxon. The new species belongs to a short list of green algae found in the young South Atlantic oceanic corridor, an assemblage defining a phycological paleobioprovince discrete from that of the Tethyan realm.

Heydrichia (?) poignantii, sp nov (Sporolithaceae, Sporolithales, Rhodophyta), a 100 million year old fossil coralline red alga from north-eastern Brazil, and a new Hauterivian record of Sporolithon from Switzerland

Fossil specimens of Heydrichia (?) poignantii, sp. nov. (Sporolithaceae, Sporolithales, Rhodophyta), representing the first confirmation of the genus in the fossil record, were discovered in thin sections of Albian limestones from the Riachuelo Formation, Sergipe Basin, and in thin sections of Albian -Cenomanian limestones from the Ponta do Mel Formation, Potiguar Basin in north-eastern Brazil. A detailed morphological-anatomical account of the species is provided, and its placement in Heydrichia is discussed in relation to current classification proposals. Comparisons with the four other known species of the genus, all non-fossil, show that H. poignantii is the only known species of Heydrichia in which thalli are encrusting to sparsely warty to horizontally layered with overlapping lamellate branches that commonly appear variously curved or arched, and in which thalli have sporangial complexes that become buried in the thallus. The evolutionary history of Heydrichia remains uncertain, but available data suggest that the genus may have diverged from the sporolithacean genus Sporolithon, known as early as Hauterivian times (c. 129.4-132.9 +/- 1 Ma) from Spain (and newly reported here from Switzerland), or it may have arisen from a graticulacean alga such as Graticula, dating from mid-Silurian times (c. 427-435 Ma). Current data also suggest that Heydrichia is more likely to have arrived in Brazil from Central Atlantic waters than from higher latitude South Atlantic waters. This implies that currently living species in southern Africa probably arose later from ancestors further equatorward in the South Atlantic, although confirming studies are needed. All non-fossil species of Heydrichia are known only from the southern hemisphere.

Riqueza, abundância e sazonalidade de comunidades de macroalgas em diferentes escalas espaciais em riachos da região centr-sul do estado do Paraná

Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq)

Reproduction, food dynamics and exploitation level of Oreochromis niloticus (Perciformes: Cichlidae) from artisanal fisheries in Barra Bonita Reservoir, Brazil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência do herbicida Glifosato (N-Fosfonometil)Glicina) na formação de biomassa da alga Pseudokirchneriella subcapitata (Chlorophyceae)

Herbicides are chemical agents most consumed for agricultural production and of these, glyphosate (N-(phosphonomethyl) glycine) represents more than half of world consumption of non-selective herbicides, use of systemic action and post-emergent. The present study aims to analyze the interference of different concentrations of glyphosate in the development of micro algae, unicellular species Pseudokirchneriella subcapitata, with supplementary analysis of the interference of green algae concentrations in the artificial lake Instituto de Biociências Universidade Estadual Paulista in Rio Claro, SP. To identify the effect of glyphosate on the development of microalgae concentrations: 0.118; 0.236; 0.472; 0.944; 1.888 and 3.776 mg of product (all in rejoinders), maintaining control without glyphosate, were inoculated into flasks containing 150mL of medium culture and 5mL of suspension inoculum levels. Each test was continued for 96 hours in a shaker rotating at 150 rpm at 25 / - 2 ° C and constant light of 3200 lux. At baseline and 48; 72 and 96 hours samples were taken for testing for absorbance. The final dry weight was measured and the tests with P. subcapitata cell number was quantified at the beginning and end of the tests using the Neubauer chamber under optical microscope. For algae of the artificial lake of the diversity of microalgae cells was identified through photographic documentation. The analysis of variance comparing treatments for dry biomass showed no significant differences in the tests with P. subicapitata as for the algae to the lake.The analysis of variance MANOVA showed significant differences between the treatments over time but there was no significant difference between the interactions of treatment for tests with P. subicapitata There were significant differences in the tests with microalgae of the artificial lake. With respect to cell quantification, it was found... (Complete abstract click electronic acces below)

A cunha do ciclo de fácies do Grupo Guatá (Eopermiano) na margem sub-aflorante do norte paranaense

A wedge facies cycle it‟s a body of sedimentary rock, bounded above and below by unconformity and which represents a transgressive-regressive cycle of deposition. This cycle is formed by the following succession of facies: non-marine (N), transitional-coarse texture, and marine-fine texture; The objective of this study have been members of the sandstones and Triumph Siderópolis, seconded by rare calcareous sandstones and very thin limb Paraguaçu. Through analysis of facies in wells testified by CPRM, it was possible to group on facies successions and set the standard stacking. The Triunfo Member consists of three cycles of facies, lithology whose standard indicates a vertical arrangement ''type'' tuning up, other words, a component sandy bottom in the form of '' box'', followed by components sandy-clayey and clayey-carbonaceous (1st and 2nd cycle) and / or shale and limestone (3rd cycle), represented by the base member Paraguaçu. The first cycle only occurs on NF-5 wells and NF-6 in the form of Onlap channel dug in post-Itararé group. The cycle II also reaches wells NF-4 and NF-3 to the north, while the cycle III reaches the southern area, well NF-9. The member Paraguaçu, well PP-25 is predominantly clay-síltico, also stand out limestones and sandstones. The limestones are not coastal marine organisms probably connected with the algae and cyanobacteria, the sandstones are fine-textured, very thin and coastal deposition environment. The member Siderópolis, well NF-2 consists of a sandstone fluvial-estuarine deployed in the valley section, and succeeded by sandstones and siltstones bioturbed, they have linked the transgression of the Fm. Palermo

Síntese de microesferas de quitosana para aplicação em liberação controlada de drogas pelo método de atomização e coagulação

Chitosan is a natural biodegradable polymer with great potential for pharmaceutical applications due to its biocompatibility, high charge density , nontoxicity and mucoadhesion. Gel formation can be obtained by the interactions of chitosans with low molecular counterions such as polyphosphates, sulphates and crosslinking with glutaraldehyde. This gelling property of chitosan allows a wide range of applications such as coating of pharmaceuticals and food products, gel entrapment of biochemicals, whole cells, microorganisms and algae. One of its main applications is the synthesis of microspheres for coating of pharmaceuticals , magnetic particles an other substances. In such a way, we can build targeted drug delivery systems. In the present work, we applied the method of spraying and coagulation. The resulting microspheres, then, were characterized by optical microscopy

Utilização de dados e técnicas de Sensoriamento Remoto no monitoramento da infestação por plantas aquáticas em reservatório de hidrelétrica

As an effect of the imbalance caused by the damming of rivers and pollution, it has been observed a growing aquatic plants infestation in reservoirs for the generation of electricity. In addition to power generation, these sites have also been used for various other purposes, including recreation, attracting water and navigation. Thus it is important to evaluate these water bodies periodically, in order to verify the leading conditions to the growth of algae, plants and other organisms. In this sense, Remote sensing technology can be a valuable tool for mapping and monitoring the occupation of land in the vicinity of the water body and the optical properties of water, to provide subsidies for the effective management of these aquatic environments. This paper aims to perform the monitoring of the occurrence of aquatic plants in Salto Grande Hydropower Reservoir, located in Americana (SP) and, periodically, map the occupation of land in the vicinity of the water body, through multispectral images taken by sensors on the satellites Landsat series in seven consecutive years: 2004, 2005, 2006, 2007, 2008, 2009 and 2010. The adopted methodological procedure included the images data and the classification of multispectral images to map, every year, the location and extension of the area infested by aquatic plants and the occupation of land