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Search Results: 1 - 10 of 16935 matches for " Viviane Severiano dos;Tenenbaum "
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Protozooplankton characterization of two contrasting sites in a tropical coastal ecosystem (Guanabara Bay, RJ)
Gomes, Eli Ana Traversim;Santos, Viviane Severiano dos;Tenenbaum, Denise Rivera;Villac, Maria Célia;
Brazilian Journal of Oceanography , 2007, DOI: 10.1590/S1679-87592007000100004
Abstract: much time and resources have been invested in understanding plankton dynamics in guanabara bay (brazil), but no attention has been devoted to the protozooplankton. to fulfill this lacuna, abundance and composition of protozooplankton were investigated from january to december - 2000 in fortnightly surface water samplings at two distinct water quality sites (urca - closer to the bay entrance, more saline and cleaner waters; ramos - inner reaches, hypereutrophic waters). the density at urca (103 - 105 cell.l-1) was one to three orders of magnitude lower than at ramos (104 - 105 cell.l-1). a seasonal trend for nanoplankton and protozooplankton was more evident at urca, but both sites had lower densities during the colder period. small heterotrophic dinoflagellates (20-30 mm) were dominant in over 50% of the samples. the protozooplankton abundance and composition reflected the distinct trophic conditions states found at the bay. during the wet-warm season, non-oligotrich ciliates were representative of ramos site with gymnodiniaceae dinoflagellates, while tintinnids and heterotrophic dinoflagellates were predominantly found at urca mainly during the dry-cold season. this first descriptive study towards the understanding of the intricate relationships among the microbial food web components reveals that protozooplankton can be a good indicator of water quality conditions at the bay.
Study about Top-Down and Bottom-Up Controls in Regulating the Phytoplankton Biomass in a Eutrophic Reservoir in Northeastern Brazil  [PDF]
Juliana dos Santos Severiano, Ariadne do Nascimento Moura, Enaide Marinho de Melo Magalh?es, Viviane Lúcia dos Santos Almeida
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.48071
Abstract: This study aims to analyze the effects of nutrients and predation by zooplankton on phytoplankton biomass (chlorophyll a) in a eutrophic reservoir in Brazil (Apipucos Reservoir, State of Pernambuco), through experiments in microcosms. For this, samples of water were placed in 1 L Erlenmeyer flasks and kept for seven days. Treatments included the addition of nutrients (nitrogen combined with phosphorus and isolated additions of nitrogen and phosphorus), with presence and absence of zooplankton and a control which contained the reservoir water without any manipulation. The addition of nutrients did not stimulate phytoplankton growth. However, zooplankton significantly decreased phytoplankton biomass in the treatments it was added to (p < 0.05). The results of this study showed that for the reservoir studied, predation by zooplankton is the most significant factor in the regulation of phytoplankton, contradicting several studies which show that phytoplankton biomass is more strongly controlled by nutrients (bottom-up control) than by predation (top-down control).
Auto- and heterotrophic nanoplankton and filamentous bacteria of Guanabara Bay (RJ, Brazil): estimates of cell/filament numbers versus carbon content
Santos, Viviane Severiano;Villac, Maria Célia;Tenenbaum, Denise Rivera;Paranhos, Rodolfo;
Brazilian Journal of Oceanography , 2007, DOI: 10.1590/S1679-87592007000200006
Abstract: variations of nanoplankton (2-20 μm) and filamentous bacteria (diameter: 0.5-2.0 μm) of guanabara bay (rj, brazil) are presented, considering cell density and carbon content of auto- and heterotrophs. our goal is to contribute to future modeling of local trophic dynamics. subsurface water samples were taken weekly during the year 2000 at two sites: urca (close to the entrance, more saline, eutrophic) and ramos (inner area, less saline, hypertrophic). microscopic analysis was done by epifluorescence and cell density was converted to biomass through cell biovolume. total nanoplankton was about 108 cells.l-1 in most samples (>57%), and total filamentous bacteria densities varied from 105 to 108 fil.l-1. autotroph density was one order of magnitude higher at ramos, both for nanoplankton (md: 108cells.l-1 at ramos and 107cells.l-1 at urca) and for filamentous bacteria (md: 106 fil.l-1 at ramos and 105 fil.l-1 at urca). the same was observed for autotrophic biomass (md: 103μgc.l-1 at ramos and 101μgc.l-1 at urca for nanoplankton; md: 28μgc.l-1 at ramos and 1.4μgc.l-1 at urca for filamentous bacteria). the relative contribution of autotrophs increased after conversion to biomass. seasonal variation was conspicuous for filamentous bacteria at both sites and for nanoplankton only at ramos, with maximum autotrophic abundances during the rainy period (spring-summer).
A violência sexual contra crian?as e adolescentes: conhecer a realidade possibilita a a??o protetiva
Santos, Viviane Amaral dos;Costa, Liana Fortunato;
Estudos de Psicologia (Campinas) , 2011, DOI: 10.1590/S0103-166X2011000400013
Abstract: this text presents the results of research carried out in the infancy and youth courts in brasília, brazil. the aim of the research was to evaluate the enforcement of the protective measures applied by the judge to child and adolescent victims. the method included documentary analysis; telephone contact with the institutions responsible for carrying out the protective measures judicially applied; telephone contact with 25 police departments in brasília. the results showed that sexual abuse occurs in the home and is perpetrated by close relatives. the main victims are girls between the ages of three and eight. it also showed that there is a disconnect in the actions taken by the agencies of the legal and protective system. the results showed that the effectiveness of the protective action depends on the establishment of a network that promotes connectedness and partnership between the legal and care organizations. it also represents a significant contribution to the construction of public policies focusing on prevention and intervention with regard to sexual abuse.
O uso da acupuntura no auxílio à terapia da doen?a idiopática do trato urinário inferior dos felinos
Giovaninni, Luciano Henrique;Piai, Viviane dos Santos;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010000300037
Abstract: several diseases may affect feline lower urinary tract, causing unspecific signs such as: hematuria, dysuria, pollakiuria, stranguria, periuria or urethral obstruction, which are clinically described as feline lower urinary tract disease (flutd). however, flutd is of unknown etiology in up to 65% cases, named as idiopathic feline lower urinary tract disease (idiopathic flutd), which is a challenge to veterinary, since there is nor diagnostic or effectiveness treatment available. recently, many studies have evaluated the role of neurogenic inflammation related to stress as etiology factor to idiopathic flutd. there are scientific evidences that acupuncture recuperate homeostasis, reduce stress and, by peripheral nerves stimulation, active endogenous antinociception mechanisms, modulating inflammatory and pain mediators' release, such as substance p. the aim of this review was to describe how acupuncture may be recommended to idiopathic flutd therapy, based in modulating bladder neurogenic inflammation and reducing the stress in these cats.
Tratamento nutricional em pacientes com insuficiência cardíaca
Sahade, Viviane;Montera, Vanessa dos Santos Pereira;
Revista de Nutri??o , 2009, DOI: 10.1590/S1415-52732009000300010
Abstract: heart failure is a serious and increasing public health problem around the world, and is the common endpoint of most heart diseases. despite recent medical advances, little attention has been given to the non-pharmacological treatments, specifically, to nutritional therapy. the clinical course of patients with heart failure constantly progresses to varying degrees of malnutrition caused by different factors and not necessarily related to body mass index. thus, the objective of this study was to search the literature for evidences of a proper diet composition for heart failure patients. the medline, pubmed, lilacs and scielo databases, and the national and international health committees were systematically searched for articles published between 1981 and 2006. there were few well-designed studies on proper diet therapies for heart failure patients. the ones reviewed focused on restricting table salt and liquids but gave little attention to the amount and quality of other nutrients. there is growing evidence that diet is an important factor in the prognosis and treatment of these patients. however, future studies, including clinical trials with adequate numbers of participants, are necessary if nutritional supplements are to be safely prescribed.
Avocado and Cardiovascular Health  [PDF]
Camila Weschenfelder, Júlia Lorenzon dos Santos, Priscilla Azambuja Lopes de Souza, Viviane Paiva de Campos, Aline Marcadenti
Open Journal of Endocrine and Metabolic Diseases (OJEMD) , 2015, DOI: 10.4236/ojemd.2015.57010
Abstract: Avocado is a fruit which had a caloric density of 1.7 kcal per gram and a half unit (~70 g) is composed by 114 kcal, 4.6 g of fibers, 345 mg of potassium, 19.5 mg of magnesium, 1.3 mg of vitamin E and 57 mg of phytosterols. Approximately 75% of fiber’s avocado contents are considered insoluble and 25% are soluble. The avocado contains lipids that consist of 71% from monounsaturated fatty acids (MUFA), 13% from polyunsaturated (PUFA) and 16% from saturated fatty acids (SFA). Recent researches have shown that avocado may improve hypercholesterolemia and may be useful in the treatment of hypertension and type 2 diabetes mellitus (T2DM). This way, avocado plays an important role in the cardiovascular health. This review summarizes the potential benefits of avocado consumption in the prevention of cardiovascular risk factors and metabolic diseases.
Fertility Evaluation of Limed Brazilian Soil Polluted with Scrap Metal Residue
Flávia Almeida Gabos,Aline Reneé Coscione,Ronaldo Severiano Berton,Gláucia Cecília Gabrielli dos Santos
Applied and Environmental Soil Science , 2013, DOI: 10.1155/2013/543095
Abstract: The aim of this work was to characterize the main inorganic contaminants and evaluate the effect of lime addition, combined with soil dilution with uncontaminated soil, as a strategy for mitigation of these contaminants present in a soil polluted with auto scrap. The experiment was performed in a greenhouse at Campinas (S?o Paulo State, Brazil) in plastic pots (3?dm?3). Five soil mixtures, obtained by mixing an uncontaminated soil sample with contaminated soil (0, 25, 50, 75, and 100% contaminated soil), were evaluated for soil fertility, availability of inorganic contaminants, and corn development. In addition to the expected changes in soil chemistry due to the addition of lime, only the availability of Fe and Mn in the soil mixtures was affected, while the available contents of Cu, Zn, Cd, Cr, Ni, and Pb increased to some extent in the soil mixtures with higher proportion of contaminated soil. Liming of 10?t?ha?1 followed by soil dilution at any proportion studied was not successful for mitigation of the inorganic contaminants to a desired level of soil fertility, as demonstrated by the available amounts extracted by the DTPA method (Zn, Pb, Cu, Ni, Cr, Cd) and hot water (B) still present in the soil. This fact was also proved by the phytotoxicity observed and caused by high amounts of B and Zn accumulating in the plant tissue. 1. Introduction In many parts of the world, soil is still considered as an option for waste disposal, acting simultaneously as a filter that protects the groundwater and as a bioreactor in which many pollutants may be degraded or stored [1]. Thus, inorganic chemical elements accumulate in soil as a result of human activities. The monitoring and remediation of contaminated soil are relatively new processes in Brazil, introduced less than 20 years ago. The environmental agency of S?o Paulo State (CETESB) is a pioneer in the country and has identified more than 4,131 contaminated areas in that state, of which at least 13% are contaminated exclusively by the addition of heavy metals to the soil [2]. Soil contamination by heavy metals requires an effective and affordable solution due to their potential toxicity and high persistence [3]. Among the so-called heavy metals, elements such as Cu (copper), Pb (lead), and Zn (zinc) are important contaminants because high quantities of these elements can decrease crop production and due to the risk of biomagnification and bioaccumulation in the food chain [4, 5]. Other inorganic contaminants that are not as frequently considered, such as B (boron) and Ba (barium), can be extremely toxic to
Metacercárias livres (Digenea: Diplostomidae) em Rhinella fernandezae (Anura: Bufonidae) no Sul do Brasil
Santos, Viviane Gularte Tavares dos;Amato, Suzana Bencke;
Ciência Rural , 2009, DOI: 10.1590/S0103-84782009005000210
Abstract: free metacercariae of an undetermined species of digenetic (diplostomidae) were found over in the kidneys of anurans of the species rhinella fernandezae collected in the in the municipality of imbé, on the northern coast of rio grande do sul, in southern brazil. in a sample of 90 anurans, the prevalence of free metacercariae was 3,3, and the mean intensity of infection was 8,7 helminths/host. this is the first record of free metacercariae in anurans from southern brazil and from the state of rio grande do sul.
Rhinella fernandezae (Anura, Bufonidae) a paratenic host of Centrorhynchus sp. (Acanthocephala, Centrorhynchidae) in Brazil
Santos, Viviane Gularte Tavares dos;Amato, Suzana B.;
Revista mexicana de biodiversidad , 2010,
Abstract: cystacanths of centrorhynchus sp., were found in the coelomic cavity of anurans rhinella fernandezae (gallardo, 1957), collected in the municipality of imbé, on the northern coast of rio grande do sul in southern brazil. in a sample totaling 90 anurans, the prevalence of cystacanths was 84%, and the mean intensity of infection was 4.79 helminths/host. this is the first record of centrorhynchus sp. cystacanths in anurans from southern brazil and from the state of rio grande do sul.
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