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Search Results: 1 - 10 of 298699 matches for " Alencar Júnior "
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Synthesis of ZSM-22 in Static and Dynamic System Using Seeds  [PDF]
Lenivaldo V. de Sousa Júnior, Antonio O. S. Silva, Bruno J. B. Silva, Soraya L. Alencar
Modern Research in Catalysis (MRC) , 2014, DOI: 10.4236/mrc.2014.32007

ZSM-22 was synthesized using various sources of silica, organic template 1,6-diaminohexane, under hydrothermal conditions, with and without agitation during crystallization. Subsequently, the crystallized material was used as seeds to accelerate the crystallization process. Characterization of the ZSM-22 samples was performed by XRD, ATG/DTG and FT-IR. It was found that it is possible to synthesize ZSM-22 employing colloidal silica and pyrolytic silica as silicon sources only if the system is stirred during crystallization. The crystallization time for these systems was 13 hours, longer times of crystallization do not significantly increase the crystallinity of the sample. The addition of seeds significantly accelerates the crystallization of ZSM-22, reducing the crystallization time to only 7 hours, with stirring and with systems employing colloidal silica.

Diagnóstico da restri??o de crescimento fetal pela rela??o diametro transverso do cerebelo e circunferência abdominal
Barreto, José de Arimatea;Alencar Júnior, Carlos Augusto;
Revista Brasileira de Ginecologia e Obstetrícia , 2004, DOI: 10.1590/S0100-72032004000700005
Abstract: purpose: to evaluate the validity of transverse cerebellar diameter (tcd)/abdominal circumference (ac) ratio in the diagnosis of fetal growth restriction (fgr), determining its best cutoff value and accuracy in symmetric and asymmetric fgr. method: a prospective cross-sectional study, carried out in 250 pregnant women with singleton pregnancies, gestational age between 20 and 42 weeks, with ultrasound confirmation. the tcd measurement was obtained by placing the calipers at the outer margins of the cerebellum, after its localization in the posterior fossa, and slightly rotating the transducer below the plane of the thalami. the abdominal circumference was measured at the on junction of the left portal and umbilical veins. the best tcd/ac cutoff ratio was established by the receiver operator characteristic (roc) curve. neonates with tcd/ac ratio greater than the cutoff value were diagnosed as having fgr. we classified as gold standard for fgr the newborn infants who presented birth weight below the 10th percentile. neonates showing fgr and rohrer ponderal index between 2.2 and 3 were labeled as symmetric and below 2.2, asymmetric. results: the cutoff value calculated by the roc curve for tcd/ac ratio was 16.15. the sensitivity, specificity, accuracy, positive and negative predictive values, and likelihood ratio for positive and negative tests were 77.4, 82.6, 38.7, 96.3, 82, 4.5 and 3.7%, respectively. in the symmetric fgr, sensitivity and specificity were 80.8 and 81.7%, respectively. in the asymmetric fgr, sensitivity and specificity were 60 and 75%, respectively. conclusion: tcd/ac ratio is an effective method in symmetric and asymmetric fgr diagnosis.
Adequa??o da demanda de crian?as e adolescentes atendidos na Unidade de Emergência em Maceió, Alagoas, Brasil
Simons, Dione Alencar;Monlleó, Isabella Lopes;Simons, Sofia Alencar;Araújo Júnior, José Luiz;
Revista Brasileira de Saúde Materno Infantil , 2010, DOI: 10.1590/S1519-38292010000100006
Abstract: objective: to evaluate the extent to which the demand for services from children and adolescents are met by the doutor armando lages emergency unit in maceió, in the brazilian state of alagoas. methods: an observational cross-section study was carried out of 2,153 medical records of children and adolescents attending the emergency unit in 1998, 2001 and 2004. the variables were sex, age, sector and time attended, place of residence, hospitalization, type of injury and extent to which the demand was met, according to the criterion established by furtado et al. the chi-squared test was used to investigate associations between the variables under study, with a confidence level of 95%. results: of the 2,153 medical records analyzed, 1792 (83.2%) were classified as inadequate. most patients were male (1252 - 58.2%), aged between 10 and 18 years (931 - 43.2%), resident in maceió (1742 - 81.1%), attended in the afternoon (800 - 37.2%), at the pediatrics centre with injuries covered by chapter xix of the international classification of diseases (1039 - 48.3%). there were more inadequate medical records for females aged between 10 and 18 years, attended in the morning, residing in close proximity to the emergency unit. conclusions: there was a high percentage of inadequate service provision for children and adolescents at the emergency unit. this result suggests the health needs of this group are not being met by the basic national health system in the state of alagoas.
Percep??o de enfermeiros sobre condi??es de trabalho em setor de emergência de um hospital
Furtado, Betise Mery Alencar Sousa Macau;Araújo Júnior, José Luiz Correia de;
Acta Paulista de Enfermagem , 2010, DOI: 10.1590/S0103-21002010000200003
Abstract: objective: to determine the working conditions in the emergency sector in the hospital da restauracao, from the perception of nurses working in that sector. methods: a case study, which used a qualitative and quantitative approach, with triangulation of methods. data collection was done through open interviews, closed questionnaires and observation. 23 nurses were interviewed. to analyze the data was used the condensation of meanings and the program excel-version 2003. results: high number of patients and lack of security for the development of the work were the items most criticized by those interviewed, and confirmed by observation. from the studied group, 47.8% worked in emergency for more than 16 consecutive years, most of them female in the age range of 41 to 50 years. conclusion: the prevailing perceptions were: poor working conditions, unsatisfactory wages, unhealthy and insecure environment, leading to a feeling of discouragement that influences the quality of care.
Avalia??o clínica radiológica da artrodese lombar transforaminal aberta versus minimamente invasiva
Menezes, Cristiano Magalh?es;Falcon, Roberto Sakamoto;Ferreira Júnior, Marcos Ant?nio;Alencar, Johmeson;
Coluna/Columna , 2009, DOI: 10.1590/S1808-18512009000300010
Abstract: objective: the aim of this article is to compare the clinical and radiological results of patients who underwent open and minimally invasive transforaminal lumbar interbody fusion. methods: forty-five patients underwent transforaminal lumbar interbody fusion by the department of spine surgery of hospital lifecenter/ortopédico, between december 2005 and may 2007, 15 of them were in the open interbody fusion group, and 30 in the minimally invasive one. the indications were: the degenerative disc disease associated or not with discal herniation or stenosis; low grade lythic or degenerative spondylolisthesis and post-discectomy/laminectomy syndrome. the variables analyzed were operative time, length of hospital stay, need for blood transfusion, visual analogical pain scale (vas), oswestry functional disability index, solid fusion and return to work. results: the minimum follow-up was two years. there were eight men and seven women in the open group, and 17 men and 13 women in the mis group. the mean operative time was 222 minutes and 221 minutes, respectively. there was improvement on the vas and oswestry scores in both groups. the mean hospital stay was 3.3 days for open, and 1.8 days for the mis group. the fusion rate obtained was 93.3% in both groups. blood transfusion was necessary for three patients (20%) of the open group. conclusions: the mis tlif has similar results to open tlif in two years follow-up, with additional benefits of less postoperative morbidity, shorter hospital stay and sooner rehabilitation.
Administra??o intraperitoneal da mistura com excesso enantiomérico de 50% de bupivacaína (S75-R25) para analgesia pós-operatória em colecistectomias videolaparoscópicas
Garcia, Jo?o Batista Santos;Alencar Júnior, Ant?nio M.;Santos, Carlos Eduardo Claro dos;
Revista Brasileira de Anestesiologia , 2007, DOI: 10.1590/S0034-70942007000400002
Abstract: background and objectives: the analgesic effect of intraperitoneal administration of local anesthetics after laparoscopic cholecystectomy is a controversial issue, and the results described vary from considerable pain relief to little reduction in pain. the objective of this study was to evaluate the efficacy of the intraperitoneal administration of 50% enantiomeric excess bupivacaine (s75-r25) for the postoperative pain relief of laparoscopic cholecystectomy. methods: a randomized, double blind, placebo controlled study was conducted with 40 patients undergoing laparoscopic cholecystectomy, who were divided in two groups: gi (n = 20) received 80 ml of intraperitoneal 0,125% s75-r25 bupivacaine at the end of the procedure; and gii (n = 20) received 80 ml of intraperitoneal normal saline. both groups received 40 mg of tenoxicam and 30 mg.kg-1 of intravenous dypirone shortly before the end of the surgery. tramadol was used for postoperative analgesia (po). pain scores were evaluated at rest, sitting up, and during the valsalva maneuver, according to a numeric scale upon waking up and 2, 4, 8, 12, and 24 hours postoperatively; the presence of shoulder pain was assessed, as well as the length of time until the first request of analgesic and its cumulative consumption. results: there was a statistically significant difference in resting pain scores at 12 hours po (gi < gii). the length of time until the first request of tramadol was greater in gi and this group presented smaller consumption of this drug, but these differences were not statistically significant. conclusions: the intraperitoneal instillation of 80 ml of 0.125% s75-r25 bupivacaine provided for lower resting pain scores, which was statistically significant only at the 12th postoperative hour.
Sintomas musculoesqueléticos em eletricistas de rede de distribui??o de energia
Moriguchi, CS;Alencar, JF;Miranda-Júnior, LC;Coury, HJCG;
Brazilian Journal of Physical Therapy , 2009, DOI: 10.1590/S1413-35552009005000015
Abstract: background: linemen should be evaluated regarding the presence of musculoskeletal symptoms to guide the identification of risk factors for development of work-related musculoskeletal disorders (wmsd) and to allow the implementation of preventive measures. objective: to assess the occurrence of wmsd symptoms among linemen working at a regional branch of an electricity distribution company, to investigate whether there were differences in the proportions of symptomatic workers among the functions performed, and to perform a preliminary survey of the main risk factors present. methods: thirty male linemen (mean age 38.1±5.5 years) were evaluated, divided into three teams according to their job function (live line linemen, lll; maintenance/emergency linemen, mel; commercial linemen, cl). musculoskeletal symptoms were identified on a body map, qualified using the mcgill questionnaire and quantified using a numerical scale. the dash questionnaire was also applied to evaluate the impact of the shoulder symptoms on the workers' performance. results: seventy percent of the linemen presented at least one musculoskeletal symptom in the shoulders, back or knees. all of the lll team presented musculoskeletal symptoms and these workers had the highest scores in the dash questionnaire (28±15). sixty-seven percent of the mel team presented symptoms, and their dash score was 8±11. fifty percent of the cl team presented symptoms, but none of them had shoulder symptoms. the proportion of workers with shoulder symptoms was related to their job function (p=0.02). conclusions: a high proportion of the linemen presented symptoms which varied according to the occupational activity. interventions are needed to reduce the risk of wmsd among the linemen evaluated.
Repercuss?es perinatais do oligoidramnio sem ruptura prematura das membranas detectado até a 26a semana de gravidez
Bastos, Germana Zélia Gomes;Nogueira, Régis Oquendo;Alencar Júnior, Carlos Augusto;
Revista Brasileira de Ginecologia e Obstetrícia , 2003, DOI: 10.1590/S0100-72032003000600006
Abstract: purpose: to evaluate the perinatal outcomes of pregnancies complicated by oligohydramnios, not due to premature rupture of membranes (prm), diagnosed until the 26th week of gestation. patients and methods: we analyzed retrospectively the cases of oligohydramnios that occurred from january 1994 to december 2000, and were diagnosed until the 26th week of gestation. oligohydramnios was present when the amniotic fluid index was less or equal to 5.0 cm. after diagnosis the patients were followed-up with serial ultrasound evaluation, with emphasis on the maintenance of the oligohydramnios state. when remission of the oligohydramnios occurred, patients remained in the study. cases due to prm, fetal death detected on the first examination and the women who gave birth in another institution were excluded from the study. concerning the patients, the presence of clinical and obstetric diseases was investigated. as regards the newborns, we evaluated birth weight, time of admission/death, occurrence of death or malformations. results: twenty-seven cases of oligohydramnios were analyzed. thirteen fetuses had congenital anomalies, and among them, eight had anomalies of the urinary tract, four of the nervous system and one had cystic hygroma. fourteen patients had a clinical or an obstetric disease, mainly hypertension (10 cases). in addition, we found three cases of placenta previa and one case of thyropathy. there were thirteen fetal deaths and fourteen neonatal deaths. conclusion: oligohydramnios not due to prm, occurring in the second trimester of gestation, independent of the etiology or the presence of congenital anomalies, was associated with a fatal perinatal result.
Doen?a de Parkinson e Gravidez
Adachi, Yukari;Augusto, Ana Paula Andrade;Alencar Júnior, Carlos Augusto;
Revista Brasileira de Ginecologia e Obstetrícia , 2000, DOI: 10.1590/S0100-72032000000600009
Abstract: parkinson's disease is characterized by tremor, stiffness of the musculature, bradykinesia, and postural and march abnormalities. it attacks all ethnic groups, with no sex preference, frequently in the 45-50-year range. the diagnosis is essentially clinical. the association with pregnancy is rare. the experience with that association is scarse, some questions remaining without answer. the authors describe a case of parkinson's disease and gestation with satisfactory evolution, in spite of the clinical worsening during pregnancy. the mother presented elevation of blood pressure levels, alterations of the hepatic enzymes, and oligohydramnios. she used, independently, selegiline until the third month, and, later on, amantadine. the newborn presented low weight, respiratory distress and jaundice, being discharged from the hospital, with no other complications, on the fourth day of life.
Fatores preditores para o óbito neonatal em gesta??es com diástole zero ou reversa na doplervelocimetria da artéria umbilical
Martins Neto, Manoel;Carvalho, Francisco Herlanio Costa;Mota, Rosa Maria Salani;Alencar Júnior, Carlos Augusto;
Revista Brasileira de Ginecologia e Obstetrícia , 2010, DOI: 10.1590/S0100-72032010000700008
Abstract: purpose: to evaluate the antenatal and postnatal risk factors of neonatal death in pregnancies with absent (dz) or reverse (dr) end-diastolic flow in the umbilical artery. methods: a cross-sectional retrospective study based on data from 48 medical records of singleton pregnancies with dz or dr, and gestational age of 24 to 34 weeks, at a maternity in the brazilian northeast. mean age was 27.3 (sd: 7.9) years. twenty (41.7%) patients were primiparas. hypertensive disorders were found in 44 (91.7%) cases. thirty-five women (72.9%) had dz and 13 (27.1%) had dr. univariate analysis was firstly done (student's t-test and fisher's exact test) correlating the parameters with the assessed outcome (neonatal death). variables that showed significant association were included in the logistic regression model (wald statistics). the level of significance was set at 5%. results: the perinatal mortality rate was 64.6% (31/48). there were five stillbirths and 26 neonatal deaths. the mean gestational age at diagnosis was 27.9 (sd: 2.8) weeks. deliveries before 24 hours after diagnosis occurred in 52.1% of the cases. cesarean section was performed in 85.4% of the sample. the newborns weighed 975.9 g on average (sd: 457.5). twenty-four (57.1%) presented apgar scores below 7 in the first minute and 21.4% in the fifth minute. gestational age at diagnosis, birth weight and apgar of the first minute proved to be variables significantly related to neonatal death (p values were: 0.008, 0.004, and 0.020, respectively). the odds ratio was 6.6, 25.3 and 13.8 for neonatal death, when the diagnosis was established at the 28th week, weight was <1000 g and first minute apgar score was <7, respectively. conclusions: gestational age at diagnosis, birth weight and apgar score at the first minute were factors that could predict neonatal death in pregnancies with dv or dr determined by umbilical artery doppler velocimetry.
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