oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 6 )

2019 ( 395 )

2018 ( 523 )

2017 ( 506 )

Custom range...

Search Results: 1 - 10 of 434042 matches for " J. D.;Domingues "
All listed articles are free for downloading (OA Articles)
Page 1 /434042
Display every page Item
Leisure-time physical activity during pregnancy in the 2004 Pelotas Birth Cohort Study
Domingues,Marlos Rodrigues; Barros,Aluísio J D;
Revista de Saúde Pública , 2007, DOI: 10.1590/S0034-89102007000200002
Abstract: objective: physical activity during pregnancy is a poorly investigated subject on population level. the study aimed to describe duration, type and frequency of leisure-time physical activity during pregnancy, and to explore its associated factors. methods: a population-based study was carried out during 2004 in southern brazil. a total of 4,471 mothers were interviewed soon after delivery. physical activity was measured using a questionnaire, developed for the study. results were obtained by poisson regression. results: in the sample, 14.8% of women reported to engage in some type of physical activity prior to pregnancy and 12.9% during pregnancy. in the first trimester, 10.4% of all mothers engaged in some type of physical activity; 8.5% in the second trimester and 6.5% in the third trimester. only 194 mothers (4.3%) were active during the whole pregnancy. in the adjusted analysis, leisure-time physical activity was positively associated with schooling, physical activity advice during prenatal care, and family income (p<0.001), being employed during pregnancy (p=0.05), and number of pregnancies (p=0.02). walking was the most frequent activity. conclusions: the prevalence of leisure-time physical activity is low among brazilian pregnant women. although physical activity is not perceived as being pregnancy-threatening, and current guidelines recommend it, this population's behavior does not seem to be changing. active lifestyle for both pregnant women and future mothers should be encouraged.
Synthesis and characterization of magnetic nanoparticles coated with silica through a sol-gel approach
Andrade, A. L.;Souza, D. M.;Pereira, M. C.;Fabris, J. D.;Domingues, R. Z.;
Ceramica , 2009, DOI: 10.1590/S0366-69132009000400013
Abstract: this paper investigates the influence of reaction medium ph on silica-coating of magnetite nanoparticles. magnetite nanoparticles were prepared by means of a reduction-precipitation method using ferric chloride as a starting material, which was partially reduced to ferrous salts by na2so3 before alkalinizing with ammonia. the particles were coated by sol-gel method with either ammonia or hcl aqueous solutions for either base- or acid-catalyzed hydrolysis, respectively. powder x-ray diffraction, fourier-transform infrared, and zeta potential were used for the characterization of oxides and of the coated magnetic nanoparticles. the observed difference of phiep in kcl solution for pure silica (2.0), magnetite (5.0), and silica-coated magnetite (2.3) samples confirms that the coating process was effective since the charge surface properties of coated magnetic nanoparticles are close to that of pure silica, even though the fourier-transform infrared spectra did not evidence the formation of fe-o-si bonds.
Prognostic factors for low birthweight repetition in successive pregnancies: a cohort study
Iandora Krolow Timm Sclowitz, Iná S Santos, Marlos Rodrigues Domingues, Alicia Matijasevich, Aluísio J D Barros
BMC Pregnancy and Childbirth , 2013, DOI: 10.1186/1471-2393-13-20
Abstract: Data were collected by hospital-based interviews. Newborns were weighed and measured. Gestational age was defined according to the date of last menstrual period, ultra-sound scan before the 20th week of pregnancy or the Dubowitz method. Mothers who reported at least one LBW newborn in the two previous gestations were included. Prevalence ratios (PR) and 95% confidence intervals were estimated from Poisson Regression. All estimates were adjusted for parity.A total of 4558 births were identified in 2004, and 565 met inclusion criteria, out of which 86 (15.2%) repeated LBW in 2004. Among mothers with two LBW babies before 2004, 47.9% presented LBW recurrence. Belonging to the highest socio-economic stratum (PR 0.89; 0.01-0.46) and gaining ≥ 10 kg during pregnancy (PR 0.09; 0.01-0.77) were protective against LBW recurrence. Higher risk of LBW recurrence was observed among mothers with higher parity (≥3 previous deliveries; PR=1.93; 95% CI 1.23-3.02); who had given birth to a previous preterm baby (PR=4.01; 2.27-7.10); who delivered a female newborn in current gestation (PR=2.61; 1.45-4.69); and that had not received adequate antenatal care (PR=2.57; 1-37-4.81).Improved quality of antenatal care and adequate maternal weight gain during pregnancy may be feasible strategies to prevent LBW repetition in successive pregnancies.Low birthweight (LBW) defined as birth weight lower than 2500 grams is an important infant mortality and morbidity predictor [1,2]. Birthweight derives basically from two processes: length of pregnancy and fetal growth rate. Hence, LBW might be caused either by a short gestational period (preterm birth) or by intrauterine growth restriction (small for gestational age - SGA) and even by a combination of both factors. A meta-analysis about LBW released in 1987 [3] based on English and French literature, identified 43 possible risk factors to the occurrence of LBW. The same study pointed out the fact that some mothers repeatedly deliver babies of similar
Estudo comparativo entre exercícios com dinam?metro isocinético e bola terapêutica na lombalgia cr?nica de origem mecanica
Freitas, Cíntia Domingues de;Greve, Júlia Maria D'Andrea;
Fisioterapia e Pesquisa , 2008, DOI: 10.1590/S1809-29502008000400011
Abstract: this study aimed at assessing the effects of trunk strengthening exercises on chronic, mechanical low-back pain and compare the use of isokinetic dynamometer and therapeutic ball. nineteen patients with chronic low back pain were randomly divided into two groups of trunk muscle strengthening, namely the ball group (5 men and 5 women, mean age 31,2±8,2) and the dynamometer group (2 men and 7 women, mean age 37.9±11.2). patients attended two weekly sessions during three months and were evaluated before and after treatment as to pain (visual analog scale), functional disability (roland morris questionnaire), mobility (sch?ber and fingertip-to-floor tests), and trunk concentric extensor and flexor muscles force (by the isokinetic dynamometer). the parameters selected to evaluate muscular performance were: peak torque, peak torque angle, power, work, acceleration time, and flexor/extensor ratio. data were statistically analysed and the significance level set at 5%. a significant (p<0,05) pain relief and improvement in mobility, functional disabilities and extensor force was found in both groups. the strengthening exercises relieved pain and improved functional disabilities, mobility and extensor force. both techniques are equally effective.
MORPHOLOGICAL STUDY OF THE LARYNX OF CHINCHILLA (Chinchilla laniger) ESTUDIO MORFOLOGICO DE LA LARINGE DE LA CHINCHILLA (Chinchilla laniger)
Marcelo Martinez,Heraldo Lorena Guida,Robson J. S. Domingues,Fernando D. Cassel
Revista chilena de anatomía , 1999,
Abstract: SUMMARY: The study was undertaken to collect data on morphological features of the larynx of the chinchilla. This larynx is composed by cartilaginous, membranous and muscular portions and has 9 mm of medium lenght. In the lateral wall there are the vestibular and vocal folds; the laryngeal ventricle are present in the region between the vestibular and vocal folds consisting in a moderate depression. The laryngeal epithelium was studied by light and scanning microscopic methods: the surface of the supraglottic space is covered predominantly by stratified epithelium with cobblestone appearance while it may be seen a typical pseudostratified epithelium composed by ciliated and non-ciliated cells on the subglottis area. However, near to the caudal part of the vocal fold the epithelium gradually changes through the stratified squamous to the intermediated type demonstrating paving-stone appearance.The subepithelial layer was composed by elastic and collagen fibers constituting an intricated meshwork. RESUMEN: Realizamos un estudio sobre aspectos morfológicos de la laringe de la chinchilla. La laringe está compuesta por las porciones muscular, membranosa y cartilaginosa y tiene en promedio 9 mm de longitud. En la pared lateral se localizan los pliegues vocales y vestibulares; el ventrículo laríngeo es una peque a depresión localizada entre estos pliegues. El epitelio laríngeo fue estudiado a través de la microscopía fotónica y electrónica de barrido. La superficie del espacio supraglotico está cubierto predominantemente por epitelio estratificado con aspecto de adoquín, mientras que, puede observarse un típico epitelio seudoestratificado compuesto por células ciliadas y no ciliadas en el área de la subglotis. Sin embargo, cerca de la parte caudal del pliegue vocal el epitelio cambia gradualmente de escamoso estratificado al tipo intermedio demostrando un aspecto de guardacantón. La capa subepitelial estaba compuesta por fibras elásticas y colágenas que constituían una intrincada malla.
Folivory variation in two mangrovesof Paranaguá Bay (Paraná – Brasil) Varia o nos níveis de herbivoria foliar em dois manguezais da baía de Paranaguá (Paraná – Brasil)
G, M. Ignacio,D. Domingues,P. C. Lana,J. C. Carrilho
Brazilian Journal of Aquatic Science and Technology , 2005,
Abstract: Recent studiesemphasize herbivory’s importance in mangrove’s carbon flux. Chemio- physical characteristics of the environment caninfluence leaf consumption, leading to differences in herbivory levels. This work evaluates possible differences in thedegree of leaf consumption in two similarly structured mangrove forests submitted to different levels of pollution. In eachforest, a 150 m transect was established perpendicularly to the waterline, and each one was divided in three 50 mstrata. Thirty leaves from each of the local species (Rhizophora mangle, Avicennia schaueriana e Lagunculariaracemosa) of mangrove were randomly collected, in a standardized way, in each strata. The samples were processedand herbivory levels were calculated through specific softwares. No differences were found between the forests norbetween the stratum. The lack of differences between the stratum could be a consequence of the homogeneousdistribution of the herbivorous in the forests. Furthermore, the fact that the forests present similar physiographicstructures – in terms of tree’s height, composition and distribution - can be ruling folivory levels, being more importantthan differences in soil and leaf composition. Recent studiesemphasize herbivory’s importance in mangrove’s carbon flux. Chemio- physical characteristics of the environment caninfluence leaf consumption, leading to differences in herbivory levels. This work evaluates possible differences in thedegree of leaf consumption in two similarly structured mangrove forests submitted to different levels of pollution. In eachforest, a 150 m transect was established perpendicularly to the waterline, and each one was divided in three 50 mstrata. Thirty leaves from each of the local species (Rhizophora mangle, Avicennia schaueriana e Lagunculariaracemosa) of mangrove were randomly collected, in a standardized way, in each strata. The samples were processedand herbivory levels were calculated through specific softwares. No differences were found between the forests norbetween the stratum. The lack of differences between the stratum could be a consequence of the homogeneousdistribution of the herbivorous in the forests. Furthermore, the fact that the forests present similar physiographicstructures – in terms of tree’s height, composition and distribution - can be ruling folivory levels, being more importantthan differences in soil and leaf composition.
Uso de medicamentos do nascimento aos dois anos: Coorte de Nascimentos de Pelotas, RS, 2004
Oliveira,Edilson Almeida de; Bertoldi,Andréa Damaso; Domingues,Marlos Rodrigues; Santos,Iná Silva; Barros,Aluísio J D;
Revista de Saúde Pública , 2010, DOI: 10.1590/S0034-89102010000400002
Abstract: objective: to describe medicine use by children at three, 12 and 24 months of age. methods: cross-sectional study using data from the 2004 pelotas birth cohort (southern brazil), including: 3,985 children at three months, 3,907 children at 12 months, and 3,868 children at 24 months of age. the outcome investigated was use of medicine in the 15 days preceding the interview. information on independent variables (medicine used, who indicated it, how it was obtained, periodicity of use, and therapeutic group) were collected using a standardized questionnaire administered during a home interview with the child's parents. results: prevalence of medicine use at three, 12, and 24 months was 65.0% (95% ci: 63.5;66.5), 64.4% (95% ci: 62.9;65.9), and 54.7% (95% ci: 53.1;56.2), respectively. as age increased, there was a reduction in the total number of medicines used and an increase in self-medicine, which reached 34% at 24 months. furthermore, frequency of sporadic medicine use increased, while that of continuous use decreased. medicine was purchased mainly using private resources, with roughly 10% of drugs being purchased through the brazilian national health care system. the profile of medicine types used also changed with age. the type of medicine most frequently used were dermatological products (36%) at three months; respiratory system drugs (24%) at 12 months; and analgesics (26%) at 24 months of age. compared to three months, medicine use at 24 months was characterized by decreased use of digestive tract and metabolism drugs, drugs for the sensory organs, cardiovascular system drugs, and dermatological products, and an increase in systemic anti-infectious drugs, medicine for the skeletomuscular and respiratory systems, analgesics, insecticides, and repellents. conclusions: medicine use in this cohort was high and indicates the need for prioritizing rational use of medicine in early life.
How many low birthweight babies in low- and middle-income countries are preterm?
Barros,Fernando C; Barros,Aluísio J D; Villar,José; Matijasevich,Alicia; Domingues,Marlos R; Victora,Cesar G;
Revista de Saúde Pública , 2011, DOI: 10.1590/S0034-89102011005000019
Abstract: objective: to assess the prevalence of preterm birth among low birthweight babies in low and middle-income countries. methods: major databases (pubmed, lilacs, google scholar) were searched for studies on the prevalence of term and preterm lbw babies with field work carried out after 1990 in low- and middle-income countries. regression methods were used to model this proportion according to lbw prevalence levels. results: according to 47 studies from 27 low- and middle-income countries, approximately half of all lbw babies are preterm rather than one in three as assumed in studies previous to the 1990s. conclusions: the estimate of a substantially higher number of lbw preterm babies has important policy implications in view of special health care needs of these infants. as for earlier projections, our findings are limited by the relative lack of population-based studies.
Patterns of deliveries in a Brazilian birth cohort: almost universal cesarean sections for the better-off
Barros,Aluísio J D; Santos,Iná S; Matijasevich,Alicia; Domingues,Marlos Rodrigues; Silveira,Mariangela; Barros,Fernando C; Victora,Cesar G;
Revista de Saúde Pública , 2011, DOI: 10.1590/S0034-89102011005000039
Abstract: objective: to describe the patterns of deliveries in a birth cohort and to compare vaginal and cesarean section deliveries. methods: all children born to mothers from the urban area of pelotas, brazil, in 2004, were recruited for a birth cohort study. mothers were contacted and interviewed during their hospital stay when extensive information on the gestation, the birth and the newborn, along with maternal health history and family characteristics was collected. maternal characteristics and childbirth care financing - either private or public healthcare (sus) patients - were the main factors investigated along with a description of c-sections distribution according to day of the week and delivery time. standard descriptive techniques, χ2 tests for comparing proportions and poisson regression to explore the independent effect of c-section predictors were the methods used. results: the overall c-section rate was 45%, 36% among sus and 81% among private patients, where 35% of c-sections were reported elective. c-sections were more frequent on tuesdays and wednesdays, reducing by about a third on sundays, while normal deliveries had a uniform distribution along the week. delivery time for c-sections was markedly different among public and private patients. maternal schooling was positively associated with c-section among sus patients, but not among private patients. conclusions: c-sections were almost universal among the wealthier mothers, and strongly related to maternal education among sus patients. the patterns we describe are compatible with the idea that c-sections are largely done to suit the doctor's schedule. drastic action is called for to change the current situation.
Factors associated to medicine use among children from the 2004 Pelotas Birth Cohort (Brazil)
Oliveira,Edilson Almeida de; Bertoldi,Andréa Damaso; Domingues,Marlos Rodrigues; Santos,Iná S; Barros,Aluísio J D;
Revista de Saúde Pública , 2012, DOI: 10.1590/S0034-89102012000300011
Abstract: objective: to identify factors associated to medicine use among children from the 2004 pelotas birth cohort, brazil. methods: prospective study to evaluate medicine use in children aged 3, 12 and 24 months regardless of the reasons, therapeutic indication or class. the study included 3,985 children followed up at three months of age, 3,907 at 12 months, and 3,868 at the last follow-up time of 24 months. mothers were interviewed to collect information on medicine use during the recall period of 15 days prior to the interview. the outcome was studied according to sociodemographic and perinatal variables, mother's perception of child's health and breastfeeding status. crude and adjusted analyses were performed by poisson regression following a hierarchical model. results: the prevalence of medicine use ranged from 55% to 65% in the three follow-ups. after controlling for confounders, some variables remained associated to medicine use only at the three-month follow-up with greatest use among children of younger mothers, those children who had intrapartum complications, low birthweight, were never breastfed and were admitted to a hospital. greatest medicine use was also associated with being a firstborn child at 3 and 12 months; mother's perception of their child health as fair or poor and children whose mothers have private health insurance at 12 and 24 months; highest maternal education level at all follow-up times. conclusions: different variables influence medicine use among children during the first two years of life and they change as the child ages especially maternal factors and those associated to the child's health problems.
Page 1 /434042
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.