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Search Results: 1 - 10 of 25829 matches for " Claudia FM;Rodrigues "
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Manuten??o da qualidade de rosas cortadas cv. Vega em solu??es conservantes
Pietro, Júlia de;Mattiuz, Ben-Hur;Mattiuz, Claudia FM;Rodrigues, Teresinha de JD;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000100011
Abstract: the rose is considered one of the most traditional and required cut flowers in the world market. however, after cutting, these flowers become highly perishable, because the high metabolic activity leads to senescence processes. the experiment was accomplished to verify the effect of holding solutions on the postharvest physiology of cut red roses, cv. vega. a randomized design in a factorial scheme composed by two factors was used: seven postharvest treatments and four evaluation dates. the flowers remained in the following holding solutions: 1) distilled water; 2) 8-hydroxyquinoline citrate (200 mg l-1); 3) 8-hydroxyquinoline citrate (200 mg l-1) + sucrose (20 mg l-1); 4) citric acid (75 mg l-1); 5) citric acid (75 mg l-1) + sucrose (20 mg l-1); 6) 6-benzyladenine (60 mg l-1); 7) 6-benzyladenine (60 mg l-1) + sucrose (20 mg l-1). qualitative and physiologic analyses were carried out during the evaluation period. the treatment with 8-hydroxyquinoline citrate and citric acid were the most promising to keep the quality and extend the vase life of flowers content; better maintenance of soluble and reducing carbohydrates, anthocyanin and color.
Exercício físico versus programa de exercício pela eletroestimula??o com aparelhos de uso doméstico
Santos,FM; Rodrigues,RGS; Trindade-Filho,EM;
Revista de Saúde Pública , 2008, DOI: 10.1590/S0034-89102008000100015
Abstract: objective: to evaluate the effects of electrical muscle stimulation with devices for home use on neuromuscular conditioning. methods: the study sample comprised 20 sedentary, right-handed, voluntary women aged from 18 to 25 years in the city of maceió, northeastern brazil, in 2006. subjects were randomly divided into two groups: group a included women who underwent muscle stimulation using commercial electrical devices; group b included those women who performed physical activities with loads. the training program for both groups consisted of two weekly sessions for two months, in a total of 16 sessions. comparisons of body weight, cirtometry, fleximetry, and muscle strength before and after exercise were determined using the paired t-test. for the comparisons between both groups, student's t-test was used and a 5% significance level was adopted. results: muscle strength subjectively assessed before and after each intervention was increased in both groups. significant increases in muscle mass and strength were seen only in those subjects who performed voluntary physical activity. resisted knee flexion and extension exercises effectively increased muscle mass and strength when compared to electrical stimulation at 87 hz which did not produce a similar effect. conclusions: the study results showed that electrical stimulation devices for passive physical exercising commercially available are less effective than voluntary physical exercise.
Empréstimos, estrangeirismos e suas medidas
Claudia Maria Xatara Rodrigues
Alfa : Revista de Linguística , 2001,
Abstract: A partir de um recorte do léxico francês, enfocaremos a possibilidade de se traduzirem para o português duas modalidades de contribui o à língua francesa: os empréstimos e os estrangeirismos, numa tentativa de resolu o de eventuais problemas do ato tradutório.
Antibacterial efficacy of commercial disinfectants on dirt floor used in poultry breeder houses
Pilotto, F;Rodrigues, LB;Santos, LR;Klein, WA;Colussi, FM;Nascimento, VP;
Revista Brasileira de Ciência Avícola , 2007, DOI: 10.1590/S1516-635X2007000200009
Abstract: dirt floors are used on most brazilian poultry farms since the construction of concrete floors is very expensive. in vitro tests carried out to verify the effectiveness of disinfectants do not consider the adverse conditions found in poultry farms. therefore, the present study aimed at evaluating the effect of six commercial disinfectants on the reduction of total and fecal coliforms on the dirt floor of breeder houses. the amount of disinfectant solution to be used per square meter was defined by counting total and fecal coliforms at different soil depths and by analyzing soil physical properties. coliforms were detected at 0.5 cm, and one liter of disinfectant solution was sufficient for soil saturation at this depth. after that, the efficacy of six commercial products (caustic soda, hydrated lime, phenols 1 and 2, iodine, glutaraldehyde, and quaternary ammonium) in reducing the number of coliforms, after six hours of contact with the dirt floor, was assessed using the most probable number (mpn) method. escherichia coli specimens isolated from the dirt floor were used to evaluate in vitro effectiveness of disinfectants. products that yielded the best results in the mpn method were also effective in the in vitro tests. among the tested disinfectants, hydrated lime was the most efficient, reducing the initial contamination by 2.9 log after six hours of contact with the dirt floor.
Morphoanatomy of the underground system of Androtrichum trigynum (Cyperaceae)
Pereira, Roberta Andressa;Rodrigues, Ana Claudia;
Rodriguésia , 2012, DOI: 10.1590/S2175-78602012000200006
Abstract: androtrichum has only one species, a. trigynum (spr.) pfeiffer, occurring in coastal regions of the southwestern atlantic coast. it presents an underground system consisting of rhizomes and adventitious roots. the rhizome is thickened, plagiotropic, sympodial, and floral scapes and roots arise from it. from the stem promeristem, the protoderm, procambium and ground meristem are differentiated. at the apex region, the intercalary meristem and primary thickening meristem (ptm) are observed. the adventitious roots originate from the ptm, and present root apex with closed organization. the young epidermis has papillose cells, and meristematic endoderm activity is observed. in a mature root, the outer cortex, or hypodermis, and the internal cortex can be identified. the endoderm presents radially elongated cells with thin walls and the pericycle is biseriate. the anatomical features observed in the present study are found in other species of cyperaceae and some xeromorphic characters can be identified.
El ruído magnético de barkhausen: un método de END para monitorear microestructuras en uniones soldadas
Claudia Patricia Serna Giraldo,Linilson Rodrigues Padovese
Scientia Et Technica , 2007,
Abstract: Este trabajo presenta una revisión del RMB como técnica no destructiva y su aplicación en el monitoreamento de microestructuras en uniones soldadas de aceros al carbono. Se utilizaron muestras de un, dos y tres pases en la condición como soldada. La caracterización de macroestructuras y de microdurezas se relacionaron con medidas de RMB en la superficie de la chapa. Con el RMB se identificaron las regiones de la soldadura, específicamente el límite de fusión y la zona afectada térmicamente.
Blobs in Wolf-Rayet Winds: Random Photometric and Polarimetric Variability
Claudia V. Rodrigues,A. Mario Magalhaes
Physics , 2000, DOI: 10.1086/309291
Abstract: Some isolated Wolf-Rayet stars present random variability in their optical flux and polarization. We make the assumption that such variability is caused by the presence of regions of enhanced density, i.e. blobs, in their envelopes. In order to find the physical characteristics of such regions we have modeled the stellar emission using a Monte Carlo code to treat the radiative transfer in an inhomogeneous electron scattering envelope. We are able to treat multiple scattering in the regions of enhanced density as well as in the envelope itself. The finite sizes of the source and structures in the wind are also taken into account. Most of the results presented here are based on a parameter study of models with a single blob. The effects due to multiple blobs in the envelope are considered to a more limited extent. Our simulations indicate that the density enhancements must have a large geometric cross section in order to produce the observed photopolarimetric variability. The sizes must be of the order of one stellar radius and the blobs must be located near the base of the envelope. These sizes are the same inferred from the widths of the sub-peaks in optical emission lines of Wolf-Rayet stars. Other early-type stars show random polarimetric fluctuations with characteristics similar to those observed in Wolf-Rayet stars, which may also be interpreted in terms of a clumpy wind. Although the origin of such structures is still unclear, the same mechanism may be working in different types of hot stars envelopes to produce such inhomogeneities.
Polarimetric Evidence of Non-Spherical Winds
Antonio Mario Magalhaes,Claudia V. Rodrigues
Physics , 1999, DOI: 10.1007/BFb0106354
Abstract: Polarization observations yield otherwise unobtainable information about the geometrical structure of unresolved objects. In this talk we review the evidences for non-spherically symmetric structures around Luminous Hot Stars from polarimetry and what we can learn with this technique. Polarimetry has added a new dimension to the study of the envelopes of Luminous Blue Variables, Wolf-Rayet stars and B[e] stars, all of which are discussed in some detail.
Development of Polycaprolactone/Poly(Vinyl Alcohol)/Clay Microparticles by Spray Drying  [PDF]
Mariana Sato de S. de B. Monteiro, Claudia Lopes Rodrigues, Eduardo Miguez, Maria Inês B. Tavares
Materials Sciences and Applications (MSA) , 2016, DOI: 10.4236/msa.2016.710048
Abstract: In this study, nanostructured microparticles was developed with polycaprolactone (PCL), poly(vinyl alcohol) (PVAL) and nanoparticles of the commercial sodium clay NT-25® by using the spray drying technique. The systems obtained were characterized by Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Dynamic Laser Light Scattering (DLS) and Differential Scanning Calorimetry (DSC). The NMR 13C and FTIR techniques showed that both polymers were present in the microparticles and the DSC analysis revealed a small variation in the glass transition temperature of the PCL. The XRD and SEM analyses showed that the microparticles produced were amorphous and had a concave morphology. The NT-25 nanoload reduced the microparticles’ size due to the multiple interactions formed in the hybrid nanocomposite material. Therefore, it was possible to develop microparticles by using biodegradable and biocompatible polymers, with different polarities, allowing the incorporation of hydrophilic and hydrophobic materials and enabling the inclusion of otherwise incompatible materials in the same system.
Different patterns of evolution for duplicated DNA repair genes in bacteria of the Xanthomonadales group
Marinalva Martins-Pinheiro, Rodrigo S Galhardo, Claudia Lage, Keronninn M Lima-Bessa, Karina A Aires, Carlos FM Menck
BMC Evolutionary Biology , 2004, DOI: 10.1186/1471-2148-4-29
Abstract: The genome sequences of two Xanthomonas species were used as the basis for phylogenetic analyses of genes related to DNA repair that were found duplicated. Although 16S rRNA phylogenetic analyses confirm their classification at the basis of the gamma proteobacteria subdivision, differences were found in the origin of the various genes investigated. Except for lexA, detected as a recent duplication, most of the genes in more than one copy are represented by two highly divergent orthologs. Basically, one of such duplications is frequently positioned close to other gamma proteobacteria, but the second is often positioned close to unrelated bacteria. These orthologs may have occurred from old duplication events, followed by extensive gene loss, or were originated from lateral gene transfer (LGT), as is the case of the uvrD homolog.Duplications of DNA repair related genes may result in redundancy and also improve the organisms' responses to environmental challenges. Most of such duplications, in Xanthomonas, seem to have arisen from old events and possibly enlarge both functional and evolutionary genome potentiality.The availability of complete genome sequences from different organisms makes it possible to identify, by similarity, potential homologs of genes that have been experimentally tested in other living beings, resulting in the recognition of putative functions for the proteins encoded by them. This research concept represents a revolutionary tool in modern biology, as the data generated allow for recognition of the presence or absence of genes, giving indications of the metabolic pathways present in such organisms and revealing possible particularities of the individuals in their natural habitat. Moreover, the possibility of obtaining gene sequences from organisms that have long diverged makes it feasible to use these data to trace their evolutionary origin [1]. Computer analysis of genome data, and its capacity to rapidly generate relevant information, contribut
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