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Search Results: 1 - 10 of 483482 matches for " Célio V. N. Albuquerque "
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Minera o de Exce es Aplicada aos Sistemas para Detec o de Intrus es
Eduardo Corrêa Gon?alves,Célio V. N. Albuquerque,Alexandre Plastino
Revista Eletr?nica de Sistemas de Informa??o , 2006,
Abstract: Os sistemas para a detec o de intrus es em redes de computadores freqüentemente utilizam modelos baseados em regras para o reconhecimento de padr es suspeitos nos dados do tráfego. Este trabalho apresenta uma técnica baseada na minera o de exce es que pode ser utilizada para aumentar a eficiência deste tipo de sistema. As exce es representam regras de associa o que tornam-se extremamente fortes (exce es positivas) ou extremamente fracas (exce es negativas) em subconjuntos de uma base de dados que satisfazem condi es específicas sobre atributos selecionados. S o apresentados os resultados obtidos a partir da aplica o desta técnica sobre a base KDDCup99 que registra informa es sobre conex es de rede.
Efficiency of Utilization of Nitrogen Coated with Urease Inhibitor in Maize
Ricardo S. Okumura,Daiane de C. Mariano,Paulo V.C. Zaccheo,Amanda N. de Albuquerque
Pakistan Journal of Biological Sciences , 2013,
Abstract: This study aimed to evaluate under field conditions the efficiency in the use of N coated with urease inhibitor in maize. The experiment was conducted in the year of 2007/2008. The experimental design was a randomized block design in a factorial 2 x 6, with five repetitions, constituted the N sources (common and coated with urease inhibitor) and levels (0, 40, 80, 120, 160 and 200 kg ha-1 of N) sidedressing nitrogen application in the growth stage V4. Based on the data obtained were determined recovery efficiencies, utilization, agronomic and physiological N applied. In all cases, the efficiency levels for maize were influenced by levels of sidedressing nitrogen application, in which increasing levels of N resulted in a decrease of the efficiencies, regardless of the source being common urea or coated with urease inhibitor.
Cepas de Pseudomonas spp. produtoras de metalo-betalactamase isoladas no Hospital Geral de Fortaleza
Torres,lio César Nogueira;Menezes, Everardo Albuquerque;?ngelo, Maria Rozellê Ferreira;Oliveira, Inácio Regis Nascimento;Salviano, Maria Núbia Cavalcante;Xavier, Danilo Elias;Santos Filho, Lauro;
Jornal Brasileiro de Patologia e Medicina Laboratorial , 2006, DOI: 10.1590/S1676-24442006000500003
Abstract: pseudomonas sp. is a ubiquitous gram-negative bacilli, of free and frequent life in hospital environment. metallo-betalactamases (mbls) productive bacteria are largely resistant to betalactamics of wide spectrum, including cephalosporin and carbapenem. the objective of this work was to detect pseudomonas spp. strains resistant to imipenem and ceftazidime, as well as to identify the mbls producer ones. it was studied 311 isolated strains from several clinical samples at fortaleza general hospital (fgh), from june 2002 to june 2003. identification and sensibility tests were done by the microscan?/walkaway automation system. the multiresisting strains were confirmed by the diffusion method in disk. the triage to detect mbls productive samples was accomplished by the double diffusion method, using disks containing sodium mercaptoacetat. among these samples, 24 (7.71%) indicated production of mbls and multiresistance standard in the midst of the studied strains. the antimicrobials to which the strains presented larger sensibility were piperacillin/tazobactam, with 255 (82%) of sensibility, followed by isolated piperacillin with 229 (73.63%); imipenem with 195 (62.70%); ticarcillin/clavulanic acid with 193 (62.05%); and ceftazidime with 138 (44.37%). the detection of these samples configures an emerging problem, with important implications in the antimicrobial therapeutic.
Manejo da calagem e os componentes da acidez de Latossolo Bruno em plantio direto
Ciotta, M. N.;Bayer, C.;Ernani, P. R.;Fontoura, S. M. V.;Wobeto, C.;Albuquerque, J. A.;
Revista Brasileira de Ciência do Solo , 2004, DOI: 10.1590/S0100-06832004000200010
Abstract: the effect of surface liming on acidity components in the soil profile under long-term no-tillage system is largely unknown. this study was carried out in a long-term experiment (21 years) initiated in 1978 on a brown latosol (haplohumox) located in guarapuava county, paraná state, south of brazil. the aim was to evaluate the effect of lime reapplication methods on soil acidity attributes of both solid and liquid phases. treatments consisted of: no liming, lime broadcast over the soil surface with no incorporation and lime applied on the soil surface followed by incorporation into the soil through plowing and double disking. lime was reapplied twice, in 1987 and in 1995, at rates of 4.5 and 3.0 mg ha-1, respectively. soil samples were collected manually in april 1999, at nine soil layers up to a depth of 0.40 m. lime reapplication improved the chemical environment of the soil under no-tillage, as evidenced by increases in water ph, exchangeable and soluble forms of ca and mg, base saturation in the cation exchange sites and by a decrease in exchangeable al. the application of lime on soil surface followed by no incorporation was efficient in increasing soil ph up to a 0.15 m depth and increased exchangeable and soluble ca and mg and base saturation and reduced exchangeable al in the 0-0.20 m layer. these effects were similar to those in the treatment with lime incorporation. the effectiveness of surface liming on soil acidity correction in the subsurface soil layer show that this practice is technically viable in soils under no-tillage for a long period.
Opposite lipemic response of Wistar rats and C57BL/6 mice to dietary glucose or fructose supplementation
Barbosa, C.R.;Albuquerque, E.M.V.;Faria, E.C.;Oliveira, H.C.F.;Castilho, L.N.;
Brazilian Journal of Medical and Biological Research , 2007, DOI: 10.1590/S0100-879X2007000300007
Abstract: the metabolic effects of carbohydrate supplementation in mice have not been extensively studied. in rats, glucose- and fructose-rich diets induce hypertriacylglycerolemia. in the present study, we compared the metabolic responses to two monosaccharide supplementations in two murine models. adult male wistar rats (n = 80) and c57bl/6 mice (n = 60), after 3 weeks on a standardized diet, were submitted to dietary supplementation by gavage with glucose (g) or fructose (f) solutions (500 g/l), 8 g/kg body weight for 21 days. glycemia was significantly higher in rats after fructose treatment (f: 7.9 vs 9.3 mm) and in mice (g: 6.5 vs 10 and f: 6.6 vs 8.9 mm) after both carbohydrate treatments. triacylglycerolemia increased significantly 1.5 times in rats after g or f supplementation. total cholesterol did not change with g treatment in rats, but did decrease after f supplementation (1.5 vs 1.4 mm, p < 0.05). both supplementations in rats induced insulin resistance, as suggested by the higher homeostasis model assessment index. in contrast, mice showed significant decreases in triacylglycerol (g: 1.8 vs 1.4 and f: 1.9 vs 1.4 mm, p < 0.01) and total cholesterol levels (g and f: 2.7 vs 2.5 mm, p < 0.05) after both monosaccharide supplementations. wistar rats and c57bl/6 mice, although belonging to the same family (muridae), presented opposite responses to glucose and fructose supplementation regarding serum triacylglycerol, free fatty acids, and insulin levels after monosaccharide treatment. thus, while wistar rats developed features of plurimetabolic syndrome, c57bl/6 mice presented changes in serum biochemical profile considered to be healthier for the cardiovascular system.
Variable range hopping conduction in low-temperature molecular beam epitaxy GaAs
Rubinger, R. M.;Albuquerque, H. A.;Silva, R. L. da;Oliveira, A. G. de;Ribeiro, G. M.;Rodrigues, W. N.;Rubinger, C. P. L;Moreira, M. V. B.;
Brazilian Journal of Physics , 2006, DOI: 10.1590/S0103-97332006000300004
Abstract: electric transport properties measured by van der pauw resistivity experiments of low-temperature molecular beam epitaxy (lt-mbe) gaas samples are used to identify a method to improve the resistivity of gaas material. we present results on five samples grown at 265, 310, 315, 325, and 345 oc. the electric measurements were carried out at temperatures ranging from 130 to 300 k. in this temperature range the dominant transport process is identified as variable range hopping. the hopping parameter plotted against the growth temperature is shown to present a maximum. the mechanisms responsible for this behavior are discussed in relation to the compensation ratio.
Influência do butorfanol sobre os períodos de latência e de a??o da ropivacaína pela via peridural na ovariossalpingo-histerectomia em cadelas
Albuquerque, V.B.;Souza, T.F.B.;Vivan, M.C.R.;Ferreira, J.Z.;Frade, M.C.;Perri, S.H.V.;Oliva, V.N.L.S.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2010, DOI: 10.1590/S0102-09352010000400007
Abstract: the periods of latency and duration of butorphanol associated with ropivacaine used via epidural, and this combination as anesthetic protocol for carrying out ovariosalpingohysterectomy (osh) in bitches were evaluated. sixteen animals pre-medicated with acepromazine and midazolam were used composing two groups that received: 1 (n=8) ropivacaine (0.3ml/kg) and 2 (n=8) butorphanol (0.1mg/kg) and ropivacaine (up to the volume of 0.3ml/kg) via epidural. nine moments were studied: m1 - 15 minutes after pre-anesthetic medication; m2 - 30 minutes after the epidural medication; m3, m4, and m5 - at the beginning of surgery and at clamping left and right pedicles, respectively; m6 - at ligation of the uterine cervix; and m7 and m8 - at laparorhaphy and end of skin suture, respectively. periods of latency and blocking the action of random double-covert manner were evaluated as well as the feasibility of carrying out the surgery performed by the blockade. it was observed that the group receiving ropivacaine + butorphanol allowed the execution of osh in 75% of animals without the need for anesthesia. there was no statistical difference between the periods of latency and duration. it was concluded that the combination of butorphanol to ropivacaine provides, in bitches, block compatible with the implementation of osh with short period of latency and duration of effect sufficient for the surgical procedure.
DXA, bioelectrical impedance, ultrasonography and biometry for the estimation of fat and lean mass in cats during weight loss
Naida C Borges, Ricardo S Vasconcellos, Aulus C Carciofi, Karina N V Gon?alves, Francisco J A Paula, Daniel E Filho,lio C Canola
BMC Veterinary Research , 2012, DOI: 10.1186/1746-6148-8-111
Abstract: The independent variables determined by BIO, BIA and US that best correlated (p?<?0.005) with the dependent variables (FM and LM) were BW (body weight), TC (thoracic circumference), PC (pelvic circumference), R (resistance) and SFLT (subcutaneous fat layer thickness). Using Mallows’Cp statistics, p value and r2, 19 equations were selected (12 for FM, 7 for LM); however, only 7 equations accurately predicted FM and one LM of cats.The equations with two variables are better to use because they are effective and will be an alternative method to estimate body composition in the clinical routine. For estimated lean mass the equations using body weight associated with biometrics measures can be proposed. For estimated fat mass the equations using body weight associated with bioimpedance analysis can be proposed.The body composition is used to describe the percentages of fat, bone and muscle. Therefore, two people of equal height and body weight may look completely different from each other because they have a different body composition. Fat mass (FM) and lean mass (LM) can be estimated and determined by different techniques, varying in precision and accuracy. Methods described thus for dogs and cats include body mass index, body condition score (BCS), biometry (BIO), dilution methods, bioelectrical impedance analysis (BIA), ultrasonography (US) and dual energy x-ray absorptiometry (DXA) [1,2].Many equations are available to estimate the body composition of humans. Due to the convenience of application, BIO is the non-invasive method most used to characterize groups and populations [3,4]. Regardless of the method used to predict the body composition, the validity of an equation depends on the degree of precision and accuracy with which the variables are estimated within or outside the population of origin [5]. Therefore, most of the equations are specific, and can achieve the highest predictive ability when applied to a population similar to that from which were derived [3
Anatomia angiográfica do sistema venoso coronário. Aplica??es em eletrofisiologia clínica
Melo, Wesley Duílio S.;Prudencio, Luis A. Renjel;Kusnir, Cássia E.;Pereira, Ana Lucia N.;Marques, Vera;Vieira, Magno C.;Paola, Angelo Amato V. de;
Arquivos Brasileiros de Cardiologia , 1998, DOI: 10.1590/S0066-782X1998000600006
Abstract: purpose: to study the angiographic anatomy of human coronary veins and the possibility of epicardial venous mapping through microelectrode catheters. methods: we evaluated 30 patients with sustained ventricular tachycardia using a catheter which provided occlusion of the coronary sinus ostium during venous angiography. they were 25 males, 5 females, ages ranging from 24 to 76 years (mean=52.7). the veins were studied according to their number, caliber and distribution in the anterior and posterior wall of the left ventricle. results: coronary sinus was catheterized in all patients. no discomfort or complications were observed. the number of veins from posterior wall of the left ventricle was 3.1 and anterior wall, 1.9, p<0.05. the caliber of the coronary veins were: anterior interventricular vein (distal segment = 1.19±0.22mm, midle segment = 1.65±0.35mm), posterior interventricular vein (distal segment = 1.83±0.47mm, midle segment = 2.00±0.52mm), left posterior vein (distal segment = 1.45±0.25mm, midle segment = 2.49±0.92mm); p<0.05. conclusion: the balloon occlusion technique for coronary venous angiography is feasible and safe. the number and the caliber (distal and midle) of the veins from the posterior wall of the left ventricle were significantly greater than those from the anterior wall. anatomic conditions for venous epicardial mapping are more adequate in the posterior wall of the left ventricle.
Snakebites in Paraíba, Brazil
Albuquerque, H. N.;Fernandes, A.;Albuquerque, I. C. S.;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2005, DOI: 10.1590/S1678-91992005000300003
Abstract: the epidemiological data on snakebites in the state of paraíba, brazil, is scarce. this accounts for the difficulties in helping the victims. hence, to obtain the clinical and epidemic profile of the snakebite accidents in paraíba, we studied the number of cases recorded in this state between january 1995 and december 2000. the data was collected from these sources: center for toxicological assistance (centro de assistência toxicológica - ceatox) and state secretariat of health (secretaria estadual de saude), jo?o pessoa; 3rd regional health center (3o núcleo regional de saúde - nrs) and the division of epidemiological vigilance of the municipal secretariat of health (divis?o de vigilancia epidemiológica da secretaria municipal de saúde - dve/sms), campina grande. the annual distribution of the snakebite incidence showed an irregularity and an increase in march, may and august; followed by a large reduction in november and december. it was also observed that snakebites occurred more frequently in the rural area, mainly among the male laborers between 10-49 years. in most cases, the bite occurred on the leg or foot. the interval between the snakebite and the medical assistance was less than six hours. the most common symptoms were pain, edema, erythema, and bleeding. the low lethality index and the high frequency of healing, without sequels, suggest that the treatment with serum neutralized the poison, indicating the efficacy of this treatment against snakebites by the specific species found in this region.
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