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Search Results: 1 - 10 of 182370 matches for " Marcela de Carvalho Freschi "
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Models for Master-Slave Clock Distribution Networks with Third-Order Phase-Locked Loops
José Roberto Castilho Piqueira,Marcela de Carvalho Freschi
Mathematical Problems in Engineering , 2007, DOI: 10.1155/2007/18609
Abstract: The purpose of this work is to study the processing and transmission of clock signals in networks of geographically distributed nodes, in order to derive conditions for frequency and phase synchronization between the nodes. The focus is on the master-slave architecture, which presents a priority scheme of clock distribution. One-way master-slave (OWMS ) and two-way master-slave (TWMS) chains are studied, considering that the slave nodes are third-order phase-locked loops (PLLs). Third-order PLLs are chosen to improve the transient response but, if their parameters are not well adjusted, stability problems and chaotic behaviors appear, restricting the lock-in range of the network. Lock-in range for third-order PLLs with Sallen-Key filter is determined and it is verified whether this range is reduced when the PLLs are connected to a network. Numerical experiments show how chain size changes the lock-in ranges and the acquisition times.
Comparison of DNA-extraction methods and Selective Enrichment broths on the detection of Salmonella Typhimurium in swine feces by polymerase chain reaction (PCR)
Freschi, Carla Roberta;Carvalho, Luiz Fernando de Oliveira e Silva;Oliveira, Celso José Bruno de;
Brazilian Journal of Microbiology , 2005, DOI: 10.1590/S1517-83822005000400011
Abstract: the aim of this study was to compare different dna-extraction methods and selective enrichment broths for their effectiveness to detect salmonella typhimurium in artificially inoculated swine feces samples (100 cfu/g) by polymerase chain reaction. after enrichment in rappaport-vassiliadis, selenite cystine or müller-kauffmann tetrathionate, aliquots were used for dna extraction by three different methods: boiling-centrifugation, phenol-chloroform and salting-out. aliquots of extracted dna were then used as template in pcr. the selective enrichment broths had no effect on the efficiency of pcr when boiling-centrifugation and salting-out were used. on the other hand, phenol-chloroform was superior (p<0.05) when combined to rappaport-vassiliadis. considering cost and efficiency parameters, we encourage the use of müller-kauffmann tetrathionate broth in combination with boiling-centrifugation dna-extraction procedure.
Revista Brasileira de Fruticultura , 2001, DOI: 10.1590/S0100-29452001000200049
Abstract: this study was accomplished form march, 1999 up to march 2000, in cangas, poconé, mato grosso, brazil. it aimed studying the initial development of hybrid coconut palms (dwarf x tall), by evaluating the characteristics: girth circunference (cc); live number of leaves (nfv); emitted leaves number of (nfe); number of leaflets at leaf 3 (nfof3); leaflets length at leaf 3 (nfof3); leaf 3 length (cf3) and petiole length at leaf 3 (cpf3). the experimental design used was casual blocks with four repetitions and five treatments, each plot had 16 useful plants. the statistical analysis results showed a significant difference for all characteristics. the avg x gbrpf hybrid showed the best "hybrid vigor" with greater cc, nfof3, cfof3 and cf3. on the other hand, the avej x gbrrn hybrid showed the smallest values for these characteristics, although it has expressed best result for nfe and nfv at final evaluations.
Representa??es sociais sobre o cuidar do doente mental no domicílio
Silva, Marcela Bruno de Carvalho;Sadigursky, Dora;
Revista Brasileira de Enfermagem , 2008, DOI: 10.1590/S0034-71672008000400005
Abstract: the object of this study is the social representations built by family on taking care of the mental patient at home and it brings as its goals: to apprehend the social representations built by the family on taking care of the mental patient at home, to analyze the aspects that influence taking care of them. the collection were analyzed through correspondence factorial analysis, by the software tri-deux-mots. from these analysis apprehend the social representations built by the family on taking care of the mental patient at home. in the factorial analysis of correspondence, through the stimuli mental disease and taking care of a mental patient, words like attention, pain, get sick, aggression, unbalance.
Cancer risk and preventive behavior: persuasion as an intervention strategy
Tonani, Marcela;Carvalho, Emilia Campos de;
Revista Latino-Americana de Enfermagem , 2008, DOI: 10.1590/S0104-11692008000500011
Abstract: the effectiveness of interventions for health promotion, protection, and early diagnosis may include the process of persuasion employed. this study aims to evaluate the risk level of developing cancer, considering the pertinent risk factors, and the presence of persuasion and characteristics in communication regarding cancer prevention and early detection. it is an observational study, conducted among 110 inhabitants of a neighborhood in ribeirao preto, sao paulo, brazil. it was confirmed that there are high risks for colon/rectum, cervical, and endometrial cancer; and moderate risks for the above as well as lung and breast cancer. in terms of persuasion, it was observed that cancer information was spread but not sustained for long periods. moreover, there was no reinforcement. in view of cancer risk and the identified preventive behaviors, persuasion is considered a useful strategy to reduce these risks, as well as to encourage and sustain preventive behaviors, since it indicates routes to be followed.
Sitophilus Weevil Reaction in Upland Rice Elite Lines  [PDF]
Flávia Barbosa Silva Botelho, Marcela Pedroso Mendes, Rodrigo Teixeira de Carvalho Botelho, Adriano Teodoro Bruzi, Cinthia Souza Rodrigues, Natália Botega Alves, Heloisa Oliveira dos Santos
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.612192
Abstract: Insects of the genus Sitophilus are among the most destructive pests in rice storage, and the best strategy to control it is to use resistant genotypes. In this study, 26 upland rice elite lines were evaluated for Sitophilus weevil reaction on grain weight. The seeds were placed in plastic recipients stored in a room with temperature and lightning simulating a warehouse environment. The number of living weevils and the grain weight were obtained in two evaluations, one 35 days after storage, and the other 35 days after infestation. The lines differed statistically for number of living weevils and for grain weight in both evaluations. The correlations between these two characters were -?0.99 and -?0.47 for the first and the second evaluation (P < 0.05), respectively. The lines BRS Pepita, AB 112089 and AB 112090 were the most susceptible. Seventeen of the twenty-six elite lines were resistant in both evaluations and could be successfully used in upland rice breeding programs.
Fanconi anemia and vaginal squamous cell carcinoma
Altamiro Ribeiro Dias Jr.,Marcela Cavalcante de Andrade Silva,Filomena Marino de Carvalho,Heloisa de Andrade Carvalho
Rare Tumors , 2012, DOI: 10.4081/rt.2012.e4
Abstract: Fanconi Anemia (FA) is an autosomal recessive disease characterized by chromosome instability, cellular hypersensitivity to DNA cross-linking agents, and increased predisposition to malignancies. We describe here a 28 year-old female with FA and vaginal squamous cell carcinoma treated by radiation therapy alone. The patient developed arm phlebitis, pulmonary fungal infection, and severe rectal bleeding, followed by hypocalcaemia, hypokalemia, vaginal bacterial and fungal infection, with subsequent leg and arm phlebitis, perineal abscess, and sepsis. The patient died 12 weeks later.
Determina??o do grau de umidade de sementes de ipê-do-cerrado Tabebuia ochracea ((Cham.) Standl.) pelos métodos de estufa e forno de microondas
Nery, Marcela Carlota;Carvalho, Maria Laene Moreira de;Oliveira, Luciana Magda de;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000600011
Abstract: as humidity is one of the factors that most influence upon the process of seeds deterioration in forest species, the use of both fast and effective methods for determining seeds humidity degree can aid in their preservation. with the objective of determining an appropriate methodology to determine the ipê-pity-savannah ( tabebuia ochracea (cham.) standl.) seeds humidity, four lots of seeds collected in machado-mg had their humidity level determined in two stages. in the first stage of the experiment greenhouse methods were tested at 105oc/24 h with different repetitions and recipients weights. in the second stage the greenhouse method that resulted in smaller variation among the repetitions obtained in the first stage was compared with the microwave oven method using different procedures and times of exposure. the conditions of the greenhouse method that resulted in smaller variation of results in the determination of ipê-pity-savannah seeds humidity were 103oc/17 h with the use of aluminum capsules and one-gram seed weight. the smallest variations of results between the greenhouse methodogy 103oc/ 17 h and the microwave oven take place when the time period to determine the humidity of ipê- pity- savannah seeds is five minutes.
Fun??o e imagem corporal: uma análise a partir do discurso de mulheres submetidas à cirurgia bariátrica
Castro, Marcela Rodrigues de;Carvalho, Renata Silva de;Ferreira, Vanessa Nolasco;Ferreira, Maria Elisa Caputo;
Revista Brasileira de Ciências do Esporte , 2010, DOI: 10.1590/S0101-32892010000200012
Abstract: this article aims to encompass a study of function and body image of women who underwent bariatric surgery. thus, were conducted a qualitative study based on the methodology of content analysis. it has been found from interviews with 20 patients from a specialized public health system service from the city of juiz de fora / minas gerais, with mean age of 40 years old, who underwent surgery for 2.85 years and with mean weight loss of 74.1 kg, the intrinsic relationship between function and body image. this were expressed by the changes after weight loss, which were emerged in the following categories: recovery of bodily functions, autonomy to resume old roles (such as perform duties like housekeeping, work or face the same relationships in different ways), and risking new experiences. so, the research group began to experience feelings of satisfaction and positive self-esteem, not so far experienced.
Aplica??o de instrumentos de avalia??o de estados de humor na detec??o da síndrome do excesso de treinamento
Rohlfs, Izabel Cristina Provenza de Miranda;Carvalho, Tales de;Rotta, Tatiana Marcela;Krebs, Ruy Jornada;
Revista Brasileira de Medicina do Esporte , 2004, DOI: 10.1590/S1517-86922004000200005
Abstract: the pressures tempted by the exigencies from the competitive sport lead many athletes to exceed the limits of their physical and psychological capacity, causing the manifestation of overtraining syndrome. the purpose of this review article is to discuss, through the original material, the validation process of the profile of mood states-adolescents (poms-a) for use with adults(1). this instrument was developed to serve as a brief measure of mood states among adolescents and adult populations, and had already demonstrated, in recent researches, effectiveness in the diagnosis of these altered states by intensive training. the poms-a was administered to adult athletes prior to competition, adult student athletes, adolescent athletes prior to competition, and adolescent students. a subset of adult student athletes was used to test the criterion validity of the poms-a. confirmatory factor analysis provided support for the factorial validity of 24-item, six-factor model using both independent and multi-sample analyses. relationships between poms-a scores and previously validated measures, that were consistent with theoretical predictions, supported the criterion validity. evidences were found in support of the psychometric integrity of the poms-a when extended from adolescent to adult populations. it is suggested that the poms-a is an appropriate tool with which mood profiles will be tested, besides the brevity of the test facilitates data collection in research environments. subsequent studies aim the validation and applicability of the instrument brums (current name of the poms-a) in detection of overtraining syndrome in brazilian athletes, for what already exists authorization by the authors terry, lane and fogarty(1).
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