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Search Results: 1 - 10 of 373151 matches for " Heloísa D. C. Francescato "
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Renal Development and Blood Pressure in Offspring from Dams Submitted to High-Sodium Intake during Pregnancy and Lactation
Terezila M. Coimbra,Heloísa D. C. Francescato,Ana Paula C. Balbi,Evelyn C. S. Marin,Roberto S. Costa
International Journal of Nephrology , 2012, DOI: 10.1155/2012/919128
Abstract: Exposure to an adverse environment in utero appears to programme physiology and metabolism permanently, with long-term consequences for health of the fetus or offspring. It was observed that the offspring from dams submitted to high-sodium intake during pregnancy present disturbances in renal development and in blood pressure. These alterations were associated with lower plasma levels of angiotensin II (AII) and changes in renal AII receptor I (AT1) and mitogen-activated protein kinase (MAPK) expressions during post natal kidney development. Clinical and experimental evidence show that the renin-angiotensin system (RAS) participates in renal development. Many effects of AII are mediated through MAPK pathways. Extracellular signal-regulated protein kinases (ERKs) play a pivotal role in cellular proliferation and differentiation. In conclusion, high-sodium intake during pregnancy and lactation can provoke disturbances in renal development in offspring leading to functional and structural alterations that persist in adult life. These changes can be related at least in part with the decrease in RAS activity considering that this system has an important role in renal development. 1. Introduction The risk of hypertension, renal, and cardiovascular disease are in part determined before birth by intrauterine factors. Exposure to an adverse environment in utero appears to programme physiology and metabolism permanently, with long-term consequences for health of the fetus or offspring [1, 2]. The nephrogenesis in rats begins on embryonic day 12 and is completed at between 10 and 15 days after birth [3, 4]. Clinical and experimental evidence show that the renin-angiotensinn system (RAS) participates in renal development [5–11]. In the rat kidney, angiotensinogen expression is higher during the late gestation and newborn period whilst renin mRNA is detected from embryonic day 17 and is higher on embryonic day 20 and in newborns compared to adults [7, 8]. Renal AII content is several fold higher in newborn rats and mice than in their adult counterparts. The AII receptors are also expressed to a greater degree in newborn rats [9]. The mRNA for the type 1 AII receptor (AT1) has been detected in the renal glomeruli of newborn rats during cellular proliferation and differentiation [10]. Increase in fibronectin, -SM-actin ( -smooth muscle actin), PCNA (proliferating cell nuclear antigen) and p-ERK (extracellular signal-regulated protein kinase) expressions were observed in the renal cortex of 1- and 7-day-old rats, followed by a decrease during renal development [12].
Effect of trickle irrigation on root development of the wet bulb and 'pera' orange tree yield in the state of S?o Paulo, Brazil
Pires, Regina C. de M;Bodine Junior, Décio;Sakai, Emílio;Villar, Heloísa L;Silva, Tonny J. A. da;Arruda, Flávio B;
Engenharia Agrícola , 2011, DOI: 10.1590/S0100-69162011000600007
Abstract: the aim of this study was to evaluate the effect of different microirrigation designs on root system distribution in wet bulb region, orange orchard yield and quality of orange fruits. the experiment was installed as random blocks with five treatments and four replicates in an orchard of 'pêra' orange trees grafted on 'cleopatra' mandarin rootstock. the treatments consisted of: one drip line (t1), two drip lines (t2), four drip lines (t3) per planting row, microsprinkler irrigation (t4) and without irrigation (t5). irrigation treatments favored yield and obrix. the treatment with a single drip line (t1) showed the greatest quantity of roots in relation to the treatments t2 and t3.
Study of Corrosion Resistance of Laser Welded Au-Pd-Ag-In Alloy Using Electrochemical Techniques  [PDF]
Márcio L. Dos Santos, Heloísa A. Acciari, Carla S. Riccardi, Antonio C. Guastaldi
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.27098
Abstract: The aim of this work was to evaluate the corrosion resistance of AuPdAgIn alloy, submitted to laser beam welding, in 0.9% NaCl solution, using electrochemical techniques. Measures of the open circuit potential (OCP) versus time were applied to electrochemical experiments, as well as potentiodynamic direct scanning (PDS) and electrochemical impedance spectroscopy (EIS) on AuPdAgIn alloy, submitted to laser beam welding in 0.9% NaCl solution. Some differences observed in the microstructure can explain the results obtained for corrosion potential, Ecorr, and corrosion resistance, Rp. EIS spectra have been characterized by distorted capacitive components, presenting linear impedance at low frequencies, including a non-uniform diffusion. The area of the laser weld presented corrosion potential slightly superior when compared to the one of the base metal. The impedance results suggest the best resistant corrosion behavior for laser weld than base metal region. This welding process is a promising alternative to dental prostheses casting.
Menopausal Status and Metabolic Syndrome in Women in Climacteric Period Treated at a Clinic in Southern Brazil  [PDF]
Karina Giane Mendes, Heloísa Theodoro, Alice D. Rodrigues, Fernanda Busnello, Dino Roberto S. de Lorenzi, Maria Teresa A. Olinto
Open Journal of Endocrine and Metabolic Diseases (OJEMD) , 2013, DOI: 10.4236/ojemd.2013.31005
Abstract:

Background: This study aims to understand the relationship between menopausal status and the presence of Metabolic Syndrome in women from 40 to 65 years, as well as to describe the distribution of each component of Metabolic Syn- drome according to sample characteristics. Methods: A cross-sectional study was conducted with 551 women treated at a clinic in southern Brazil. MetS and its components were defined according to NCEP-ATP III and menopausal status as pre, peri, and post-menopause. Prevalences of menopausal status and of MetS and its components were calculated. Estimates of prevalence ratios crude and adjusted with confidence intervals of 95% were calculated by Poisson Regression with robust variance. Demographic, socioeconomic, behavioral, and reproductive characteristics were considered as potential confounding factors in multivariable models based on a conceptual framework of MetS determination. Results: The prevalence of Metabolic Syndrome in the sample was 56.1% (CI95%: 51.9 to 60.2), being more common among older women (56 to 65 years), with low education, menarche < 11 years old, with three or more pregnancies and in the post-menopausal period. In multivariate analysis, there was an increase of prevalence ratios when comparing perimenopause and post-menopause with pre-menopause; however, the confidence intervals include the unit. Regarding the analysis of isolated components in the sample, the most prevalent altered components were: hypertension (84.8%; CI95%: 81.7 to 87.8), waist circumference (66.4%; CI95%: 62.5 to 70.4) and HDL cholesterol (51.7%; CI95%: 47.5 to 55.9). There was a linear increase on mean blood glucose through menopausal status. Conclusions: Our study indicates variation on the distribution of MetS and each component according to menopausal status and other women characteristics. Future studies on MetS should also have foresight to use this type of approach to improve understanding and targeting of actions and programs focusing on women in this period of life.

FLAVONóIDE QUERCETINA: ASPECTOS GERAIS E A ES BIOLóGICAS
E. B. BEHLING,M. C. SEND?O,H. D. C. FRANCESCATO,L. M. G. ANTUNES
Alimentos e Nutri??o , 2008,
Abstract: Os flavonóides s o uma classe de compostos naturais de considerável interesse científico e terapêutico. Eles s o um grupo de substancias naturais com estrutura fenólica variável. A quercetina (3,5,7,3’- 4’-pentahidroxi flavona) é o principal flavonóide presente na dieta humana. Várias propriedades terapêuticas dos flavonóides, principalmente da quercetina, têm sido estudadas nas últimas décadas, destacando-se o potencial antioxidante, anticarcinogênico e seus efeitos protetores aos sistemas renal, cardiovascular e hepático. O objetivo desta revis o é esclarecer alguns aspectos referentes aos flavonóides, em especial sobre a quercetina, e destacar suas fontes dietéticas, consumo alimentar, metabolismo, biodisponibilidade e efeitos benéficos à saúde.
Biologia floral e poliniza??o de Arrabidaea conjugata (Vell.) Mart. (Bignoniaceae)
Correia, Maria Célia Rodrigues;Pinheiro, Maria Célia B.;Lima, Heloísa Alves de;
Acta Botanica Brasilica , 2005, DOI: 10.1590/S0102-33062005000300010
Abstract: this work deals with the floral biology, the foraging activities of floral visitors (pollinators and robbers), phenology and reproductive system of arrabidaea conjugata (vell.) mart. (bignoniaceae) in the "restinga" of maricá, rio de janeiro, brazil, from 1997 to 2000. the flowers display daytime anthesis and last only one day. these attractive pink flowers are tubular, hermaphroditic, odoriferous and produce nectar as the floral reward. the nectar is secreted by a nectariferous disk concealed within a chamber. the pollen grains are gradually released throughout anthesis, extending the pollen presentation phase. the bees euglossa cordata linnaeus, centris analis fabricius and c. tarsata smith are the pollinator species. primary and secondary nectar pilferage by several bees, butterflies and a hummingbird is found in a. conjugata. the species is self-incompatible and has low fruit set (fruit/flower = 12.2%). flowering of a. conjugata lasts from december to march (hot, rainy season) with a peak in january. the seeds are anemocoric and dispersal peaks in the cold, dry season.
Increase incidence of thyroid cancer in Florianopolis, Brazil: comparative study of diagnosed cases in 2000 and 2005
Cordioli, Maria Isabel C. V.;Canalli, Maria Heloísa B. S.;Coral, Marisa Helena C.;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2009, DOI: 10.1590/S0004-27302009000400011
Abstract: objective: to provide epidemiological information about thyroid cancer (tc) in the metropolitan area of florianopolis and investigate some factors that could be associated with this type of cancer. method: this study analyzed data of patients who had tc diagnosed and underwent surgical treatment in 2000 and 2005. epidemiological factors about patients, tumors and surgical procedures were evaluated. results: in 2000 and 2005, an increasing incidence of tc at a rate of 132.33% was detected. the increased rate was mainly observed for tumors measuring less than 1 cm (p = 0.004). results also showed an increase in the number of multifocal tumors (p = 0.02) and in the rate of total thyroidectomy (p = 0.002). conclusions: the increasing incidence of tc in the metropolitan area of florianopolis is probably due to more invasive thyroid nodule management. future studies are necessary to establish potential predicting factors for papillary thyroid microcarcinoma aggressiveness, as well as predictors of follicular lesion malignancy to identifying more accurately the appropriate therapy approach.
Mercury distribution and reactivity in waters of a subtropical coastal lagoon, Sepetiba Bay, SE Brazil
Lacerda Luiz D.,Marins Rozane V.,Paraquetti Heloísa H. M.,Mounier Stephane
Journal of the Brazilian Chemical Society , 2001,
Abstract: A survey of the reactive and total Hg concentrations in surface waters and of the quantity of particulate organic carbon (POC) and dissolved organic carbon (DOC), were performed along a transect from the major rivers mouths and mangrove dominated areas to the open bay waters of Sepetiba Bay, SE Brazil. The objective of the survey was to evaluate changes in Hg reactivity during the transport along the estuarine gradient. Reactive Hg concentrations were lowest in open bay waters, (0.09 ± 0.06 ng L-1), followed by river influenced waters (0.19 ± 0.06 ng L-1), and mangrove (0.29 ± 0.02 ng L-1). Total Hg concentrations were lowest in open bay (0.38 ± 0.20 ng L-1), followed by mangrove waters (0.56 ± 0.01 ng L-1), and river influenced waters (0.99 ± 0.29 ng L-1). The percentages of reactive Hg relative to the total Hg concentrations were lowest in river influenced waters, (20.7%), followed by open bay waters (31.2%), and mangrove waters (53.2%). The percent of reactive Hg to the total Hg concentrations showed a significant negative correlation with the total Hg concentrations following a potential equation. No relationship between reactive Hg concentrations and POC, salinity or pH were found, however, reactive Hg correlates significantly with DOC, suggesting that organo-complexes, rather than chloro-complexes, are the major controllers of Hg reactivity, and eventually bioavailability in Sepetiba Bay.
Dois casos de poliembrionia em Clusiaceae: Clusia criuva Cambess. e Clusia fluminensis Planch. & Triana
Correia, Maria Célia Rodrigues;Benevides, Cristine R.;Lima, Heloísa Alves de;
Hoehnea , 2011, DOI: 10.1590/S2236-89062011000200012
Abstract: germination tests with seeds of clusia criuva cambess. and clusia fluminensis planch. & triana, dioecious tree species that occur in the sandy costal plains of maricá municipality, rio de janeiro, revealed high germination rates, 99.2% (n = 140) to c. criuva and 100% (n = 75) for c. fluminensis. polyembryony was observed in a percentage of 2.1% for c. criuva and 2.7% for c. fluminensis among the germinated seeds.
Fenologia reprodutiva de quatro espécies de Sapotaceae na restinga de Maricá, RJ
Gomes, Rejane;Pinheiro, Maria Célia Bezerra;Lima, Heloísa Alves de;
Brazilian Journal of Botany , 2008, DOI: 10.1590/S0100-84042008000400013
Abstract: the purpose of this work was to record the occurrence of phenological events related to the flowering and fructification of pouteria venosa (mart.) baheni, p. psammophila (mart.) radlk., manilkara subsericea (mart.) dubar e sideroxylon obtusifolium (roem. & schult.) t. d. penn. at the maricá-rj sand bar in the years of 2003 to 2005. pouteria venosa produced flowers from may to october, whereas m. subsericea flowered from may to september, and s. obtusifolium produced flowers from august to november. during the period of studies p. psammophila did not flower.the fruits are berry-type, and display synchronism in the maturing and release of their seeds in the months of february and march. flowering and fructification for the three species is annual, with a negative and significant correlation only between flowering and temperature. for s. obtusifolium correlation was positively significant between fruit development and the abiotic factors of temperature and precipitation.
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