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Search Results: 1 - 10 of 6341 matches for " Rozanna Marques; "
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Bioactive derivatives obtained from lecanoric acid, a constituent of the lichen Parmotrema tinctorum (Nyl.) Hale (Parmeliaceae)
Gomes, Alcir Teixeira;Honda, Neli K.;Roese, Fernanda Mesquita;Muzzi, Rozanna M.;Marques, Maria Rita;
Revista Brasileira de Farmacognosia , 2002, DOI: 10.1590/S0102-695X2002000300036
Abstract: with the aim of obtaining new compounds with potential antifungal activity, lecanoric acid, a chemical constituent of the lichen parmotrema tinctorum and its derivatives prepared from structural modification were tested against the fungus cladosporium sphaerospermum, by employing the bioautographic method. activity of the derivatives ranged from 10- to 1-μg concentrations. results demonstrated this series of compounds to have potent fungitoxic activity.
Antibacterial activity of orsellinates
Gomes, Alcir Teixeira;Smania Júnior, Artur;Seidel, Cintia;Smania, Elza de Fátima Albino;Honda, Neli Kika;Roese, Fernanda Mesquita;Muzzi, Rozanna Marques;
Brazilian Journal of Microbiology , 2003, DOI: 10.1590/S1517-83822003000300002
Abstract: in order to obtain new compounds with antibacterial activity, the derivatives 2,4-dihydroxy-6-methylbenzoic acid (orsellinic acid) and 2,4-dihydroxy-6-methylbenzoates (orsellinates) were obtained through alcoholyses of lecanoric acid. all these substances were tested against gram-positive and gram-negative bacteria by a microdilution method. staphylococcus aureus, xanthomonas campestris var. vesicatoria and ralstonia solanacearum were most sensitive to n-propyl 2,4-dihydroxy-6-methylbenzoate, n-pentyl 2,4-dihydroxy-6-methylbenzoate and n-hexyl 2,4-dihydroxy-6-methylbenzoate with mic (minimal inhibitory concentration) values ranging from 62.5 to 7.8 μg×ml1. these results showed that homologation in carbon chain may lead to compounds with more pronunced activities.
U. Soetrisno,R. Rozanna,G. Sofia,Almasyhuri Almasyhuri
Bulletin of Health Research , 2012,
Abstract: This study evaluated changes in nutrient intake of female labourers during Ramadhan fasting, in relation to the changes in iron status and blood glucose level which may affect fitness and productivity. A total of 40 female labourers were randomly chosen from 200 sample population, with the criteria: Hb value >12 g%, not lactating or pregnant, nor had metabolic disorders. They had to follow the research agenda and had to fast during the Ramadhan month, 1417 H, except when they were in menstruation period. Data on food intakes, blood component, fitness, and total patch clothes sown were collected a week before, the first and third week during Ramadhan, and a month after Lebaran. Hemoglobin and hematocrite as indicators of iron status were determined. Average energy intake before fasting month was 142% of the RDA, while during the fasting month it was 124%. Most of the labourers used to have breakfast daily, which has an averages of 30% of their total daily intake. During fasting they had 40% of total energy intake from early breakfast (makan sahur). There were decrease in energy and vegetable protein but increase in animal protein, vitamin C, and iron consumption. Glucose level and iron status were decreased but did not cause hypoglycemia nor anemia. Productivity and fitness improved during the fasting month. Total patches sown as productivity indicator were increased by 17% during morning, but decreased by 10% during afternoon sessions. Fitness improved by one level, from low to average. This study concluded that energy intakes of female labourers were lower, but fitness and productivity were better during the fasting month.
Efficient and selective iodination of phenols promoted by iodine and hydrogen peroxide in water
Gallo, Rafael D. C.;Gebara, Karimi S.;Muzzi, Rozanna M.;Raminelli, Cristiano;
Journal of the Brazilian Chemical Society , 2010, DOI: 10.1590/S0103-50532010000400026
Abstract: a simple and selective reaction for the preparation of iodinated phenols was developed and phenol derivatives containing electron withdrawing groups were iodinated in very good yields under relatively mild conditions.
O ressurgimento da química de benzino com sililaril triflatos no contexto das rea??es de inser??o em liga??es sigma
Gallo, Rafael D. C.;Rezende, Hellenicy V.;Muzzi, Rozanna M.;Raminelli, Cristiano;
Química Nova , 2009, DOI: 10.1590/S0100-40422009000900037
Abstract: in this paper we gathered articles concerning insertion reactions of arynes, exclusively generated from 2-(trimethylsilyl)aryl triflates in the presence of fluoride ions, in substrates bearing nucleophilic and electrophilic portions separated by sigma bonds. accordingly, we stand out the great importance and versatility of such transformations in the preparation of highly functionalized aromatic systems, which are hardly synthesized in just one step for other methods.
The Temporal Variability of the Freshwater Discharge and Water Levels at the Patos Lagoon, Brazil  [PDF]
Wiliam Correa Marques
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.34076
Abstract: The direct influence of freshwater discharge along the coastal regions is observed in several processes following a wide spectrum on spatial and temporal variability. The knowledge of relative importance of this physical forcing is fundamental by the correct management of the coastal sites and the understanding of consequences associated with processes of climatic order is one point deserves some investigation. The major part of the studies in the Patos Lagoon, located in the southernmost part of Brazil, is limited to investigate the effects in synoptic time scales. In this way, the objective of this study is to investigate the long term variability pattern of the Patos Lagoon discharge and water levels indentifying long term trends through wavelet analysis. The results indicated that El Ni?o (La Ni?a) events promote the intensification (decrease) of the freshwater intensity in the principal river tributaries of the Patos Lagoon following scales from 16 to 120 months (from 1.3 to 10 years). The most energetic cycle is centered in periods of 64 months (5.3 years). The longer events reflect the long term response of the non linear dynamics in Equatorial Pacific changing the precipitation pattern, principally during winter and at the end of spring and early autumn. The non-linear long term trend indicates a pattern with values of discharge normally above (below) the mean after (before) 1970’s. An increasing trend starting after 1970 possibly indicates a longer term cycle influencing the interannual variability of the Patos Lagoon discharge. The seasonality is maintained in climatic monthly means obtained after and before 1970’s, but, with mean increase around 364 m3·s?1 in freshwater discharge with reduced amplitude of the seasonal cycle.
Beyond Gangsta: Hip-Hop, Skate Culture and Web Culture in the Music of Tyler, the Creator  [PDF]
Gustavo Souza Marques
Art and Design Review (ADR) , 2015, DOI: 10.4236/adr.2015.31002
Abstract: This article came from the homonymous PhD proposal submitted and accepted by Music School of University College Cork (UCC, Ireland) to be started in September 2015 under the guidance of Dr. J. Griffith Rollefson. It aims to point out and discuss the articulations made by rapper, producer, actor and video director Tyler Okonma, known by the stage name Tyler, the Creator, to shift, but also maintain, some frames of gangsta rap discourse. Noticed by his rape fantasies lyrics and ultraviolent shouts, most present in his two first albums, Tyler has been acclaimed for his notable musical talent but criticized for its misogynist themes. Despite this outrageous aspect of its music, his confessional and often self-depreciating lyrics have been a novelty for constant self-pride and powerful hip-hop lyrics. Moreover, it works as a compensation for his aggressiveness since it could be seen as a demonstration of fragility rather than sexual domination. The way he uses hip-hop mentality, skate culture nihilism and Web 2.0 platforms to promote his art has made him one of the most prominent hip-hop artists from 21st century. Based on related authors on hip-hop topics like gangsta, misogyny, media and racial stereotypes this article discuss the ways in which Tyler, the Creator reflects but also denies the most known and commented frames of rap music.
Strongyloides stercoralis in an immunocompetent adult: An unexpected cause of weight lost  [PDF]
Lia Marques, André Rodrigues, Elisa Vedes, Dores Marques
Case Reports in Clinical Medicine (CRCM) , 2013, DOI: 10.4236/crcm.2013.27112

Strongyloides stercoralis infects at least 100 million humans worldwide each year, but its prevalence is underestimated. It is endemic in hot and humid climates as well as resource poor countries with inadequate sanitary conditions. The rise of international travel and immigration has a positive impact in strongyloidiasis. Due to its unique auto infection life-cycle, Strongyloides may lead to chronic infections remaining undetected for decades. Strongyloidiasis is most often asymptomatic but it has a wide range of clinical presentations. The two most severe forms of strongyloidiasis are hyperinfection and disseminated syndromes. These occur most often in patients with impaired cell mediated immunity. A 42-year-old immunocompetent man presented with chronic watery diarrhea, malaise, upper abdominal pain, anorexia and weight lost. Strongyloides stercoralis was identified in stool samples and duodenal biopsy. The patient was successfully treated with albendazole. The authors report a case of strongyloidiasis hyperinfection in an immunocompetent host 20 years away from an endemic area and make a literature review.

On Integer Numbers with Locally Smallest Order of Appearance in the Fibonacci Sequence
Diego Marques
International Journal of Mathematics and Mathematical Sciences , 2011, DOI: 10.1155/2011/407643
Abstract: Let be the th Fibonacci number. The order of appearance () of a natural number is defined as the smallest natural number such that divides . For instance, for all =≥5, we have (?1)>()<(
Directional Moving Target Indication: A Novel SAR Ambiguity Function for Traffic Monitoring
Paulo Marques
Journal of Electrical and Computer Engineering , 2012, DOI: 10.1155/2012/357034
Abstract: This paper presents and evaluates a novel SAR ambiguity function for traffic monitoring. The novelty consists in introducing the capability to discriminate targets moving in a predefined direction of interest, reducing the contribution of traffic moving in undesired directions. Experimental results show that the modified SAR ambiguity function provides better results than the traditional methodology and may, therefore, be useful for civil traffic monitoring using single-channel synthetic aperture radar data.
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