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Search Results: 1 - 10 of 69321 matches for " José Bauer "
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Educa o Brasileira: dos anos dourados à década perdida?
José Rubens Lima Jardilino,Carlos Bauer
Eccos Revista Científica , 2007,
Abstract:
Apontamentos sobre uma história recente: gênese e desenvolvimento da Universidade Brasileira
Carlos Bauer,José Rubens Lima Jardilino
Revista Historia de la Educación Latinoamericana , 2005,
Abstract: El trabajo es un análisis en la perspectiva de Historia de la Educación Brasile a, subrayando el proceso de desarrollo de la universidad, sus problemas y posibilidades. Busca contribuir a la reflexión crítica de las debilidades y potencialidades vivenciadas por la Ense aza Superior en Brasil en la actualidad, en especial, ahora en que se encuentra en debate una Re-Forma para ese nivel de la educación del País. Rese a los datos históricos a partir de fuentes documentales y bibliográficas sobre la reciente historia da la Universidad en Brasil, aunque, sedimentado por el deseo de su implantación al largo de los siglos XVIII y XIX.
Mecanismos moleculares de resistencia antibiótica en Escherichia coli asociadas a diarrea
Mosquito,Susan; Ruiz,Joaquim; Bauer,José Luis; Ochoa,Theresa J;
Revista Peruana de Medicina Experimental y Salud Pública , 2011, DOI: 10.1590/S1726-46342011000400013
Abstract: antibiotic resistance is an emerging problem worldwide present in many bacteria, specially in escherichia coli, which has high percentages of resistance to ampicilline, thrimethoprim-sulfamethoxazole, tetracycline, chloramphenicol and nalidixic acid, which implies important complications in antibiotic treatment when required. the increasing antibiotic resistance is due to the acquisition of different molecular mechanisms of resistance through point chromosomal mutations and /or horizontal transfer of genetic material between related or different species facilitated by some genetic elements such as integrons. this review discusses the effects of the most common molecular mechanisms of antibiotic resistance in e. coli: enzymatic inactivation, changes in the target site and permeability disturbances. getting to know the mechanisms of resistance which are involved, as the world health organization recommends, will allow us to improve the surveillance of the antibiotic resistance, the control policies and the antibiotic utilization at a national level.
Rese a de "REVISTA DIALOGIA"
José J. Queiroz,Mauricio Pedro da Silva,Carlos Bauer
Revista Historia de la Educación Latinoamericana , 2011,
Abstract:
Mecanismos moleculares de resistencia antibiótica en Escherichia coli asociadas a diarrea Molecular mechanisms of antibiotic resistance in Escherichia coli- associated diarrhea
Susan Mosquito,Joaquim Ruiz,José Luis Bauer,Theresa J Ochoa
Revista Peruana de Medicina Experimental y Salud Pública , 2011,
Abstract: La resistencia antibiótica es un problema emergente a nivel mundial presente en diversas bacterias, en especial en la Escherichia coli, que tiene altos porcentajes de resistencia hacia ampicilina, trimetoprim-sulfametoxazol, tetraciclina, cloramfenicol y ácido nalidíxico, lo que supone grandes complicaciones en el tratamiento antibiótico cuando este es requerido. Este aumento de resistencia antibiótica se debe a la adquisición de diferentes mecanismos moleculares de resistencia mediante mutaciones puntuales a nivel cromosómico o transferencia horizontal de material genético entre especies relacionadas o diferentes, facilitada por algunos elementos genéticos tales como los integrones. Esta revisión discute los efectos de los mecanismos moleculares de resistencia más comunes en E.coli: inactivación enzimática, alteraciones en el sitio blanco y alteraciones de la permeabilidad. El conocer los mecanismos de resistencia implicados, como lo recomienda la Organización Mundial de la Salud, permitirá optimizar la vigilancia de resistencia y las políticas de control y uso de antibióticos a nivel nacional. Antibiotic resistance is an emerging problem worldwide present in many bacteria, specially in Escherichia coli, which has high percentages of resistance to ampicilline, thrimethoprim-sulfamethoxazole, tetracycline, chloramphenicol and nalidixic acid, which implies important complications in antibiotic treatment when required. The increasing antibiotic resistance is due to the acquisition of different molecular mechanisms of resistance through point chromosomal mutations and /or horizontal transfer of genetic material between related or different species facilitated by some genetic elements such as integrons. This review discusses the effects of the most common molecular mechanisms of antibiotic resistance in E. coli: enzymatic inactivation, changes in the target site and permeability disturbances. Getting to know the mechanisms of resistance which are involved, as the World Health Organization recommends, will allow us to improve the surveillance of the antibiotic resistance, the control policies and the antibiotic utilization at a national level.
Análise micro-histológica da composi??o botanica de misturas preestabelecidas, submetidas ao processo de digest?o in vitro
Bauer, Maristela de Oliveira;Gomide, José Alberto;Silva, Eldo Ant?nio Monteiro da;Regazzi, Adair José;Chichorro, José Franklim;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000600008
Abstract: the botanical composition of pre-established mixtures of six forages species was estimated after in vitro digestion times and compared with the real composition. three mixtures of six species of known participations were made up in the rainy and dry seasons and estimated through the microhistological technique. the sampling season interfered with the estimates of only one of the mixtures. in spite of the statistical differences between the real composition of the mixtures and their estimates, the similarity indices for the periods were superior to 85%. the digestion time influenced mixtures estimates, according to the percentage of the species participation. the three mixtures estimates were identical after 48 and 72 hours of digestion. the digestion of the samples either improved or worsened the estimates, according to the percentage of participation and to species resistance. the digestion process must not be considered as the only factor of variation when this technique is utilized, since the similarity indices between the periods, the digestion time and the real composition were superior to 75%.
Análise comparativa de fragmentos identificáveis de forrageiras, pela técnica micro-histológica
Bauer, Maristela de Oliveira;Gomide, José Alberto;Silva, Eldo Ant?nio Monteiro da;Regazzi, Adair José;Chichorro, José Franklim;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000600007
Abstract: the objetive of this study was to verify differences among forages species in relation to the percentage of identifiable fragment as affected by the digestion process and season. fresh last expanded leaf lamina samples of the species melinis minutiflora pal. de beauv (molassesgrass), hyparrhenia rufa (nees) stapf. (jaraguagrass), brachiaria decumbens stapf. (signalgrass), imperata brasilienses trin. (sapegrass), and foliar laminas of medicago sativa l. (alfalfa) and schinus terebenthifolius raddi (aroeira), sampled in the rainy and dry seasons, were digested in vitro and prepared according to the microhistological technique. the digestion process caused change of 19 units in the percentage of identifiable fragments whose values varied among forage species. the season did not influence the percentage of identifiable fragments for most species; the presence of pigments and adherence of epidermis to internal tissues of the leaf hindered the identification of fragments. the digestion improved the identification of sapegrass fragments, jaraguagrass and schinus terebenthifolius raddi, but hindered identification of signalgrass fragments and mainly those of alfalfa.
Características anat?micas e valor nutritivo de quatro gramíneas predominantes em pastagem natural de Vi?osa, MG
Bauer, Maristela de Oliveira;Gomide, José Alberto;Silva, Eldo Ant?nio Monteiro da;Regazzi, Adair José;Chichorro, José Franklim;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000100002
Abstract: it was evaluated the effect of anatomical characteristics and tissue lignification sites on the leaf blade nutritive value of four grasses sampled during the dry and rainy season. fresh samples of the two last expanded leaf blades on the tiller tops of molassesgrass (melinis minutiflora pal. de beauv), signalgrass (brachiaria decumbens staph.), sapegrass (imperata brasiliensis trin.) and, jaraguagrass (hyparrhenia rufa (nees) staph.) were collected in the rainy and dry seasons. these samples were evaluated according to anatomical characteristics using light and scan microscopy (proportion of xylem and sclerenchyma tissues), chemical composition and in vitro dry matter digestibility (ivdmd). the experimental data were submitted to statistical analysis appropriate to the completely random design, in the factorial arrangement with three replications per treatment. the same pattern of tissue proportion and ivdmd values were observed for molassesgrass and signalgrass, as well as for sapegrass and jaraguagrass. the seasons of the year influenced the ivdmd and the concentrations of the cell wall components, but their effect on the leaf blades anatomical characteristics was inconsistent. significant and negative correlation coefficients were observed between the ivdmd and the proportions of lignified vascular bundle sheath, sclerenchyma and phloem as well as with ndf, adf and lignin contents of the leaf blades.
Microhardness of Ni-Cr alloys under different casting conditions
Bauer, José Roberto de Oliveira;Loguercio, Alessandro Dourado;Reis, Alessandra;Rodrigues Filho, Leonardo Eloy;
Brazilian Oral Research , 2006, DOI: 10.1590/S1806-83242006000100008
Abstract: this study evaluated the microhardness of ni-cr alloys used in fixed prosthodontics after casting under different conditions. the casting conditions were: (1-flame/air torch) flame made of a gas/oxygen mixture and centrifugal casting machine in a non-controlled casting environment; (2-induction/argon) electromagnetic induction in an environment controlled with argon; (3-induction/vacuum) electromagnetic induction in a vacuum environment; (4-induction/air) electromagnetic induction in a non-controlled casting environment. the 3 alloys used were ni-cr-mo-ti, ni-cr-mo-be, and ni-cr-mo-nb. four castings with 5 cylindrical, 15 mm-long specimens (diameter: 1.6 mm) in each casting ring were prepared. after casting, the specimens were embedded in resin and polished for vickers microhardness (vh) measurements in a shimadzu hmv-2 (1,000 g for 10 s). a total of 5 indentations were done for each ring, one in each specimen. the data was subjected to two-way anova and tukey's multiple comparison tests (a = 0.05). the vh values of ni-cr-mo-ti (422 ± 7.8) were statistically higher (p < 0.05) than those of ni-cr-mo-nb (415 ± 7.6). the lowest vh values were found for ni-cr-mo-be (359 ± 10.7). the vh values obtained in the conditions induction/argon and induction/vacuum were similar (p > 0.05) and lower than the values obtained in the conditions induction/air and flame/air torch (p < 0.05). the vh values in the conditions induction/air and flame/air were similar (p > 0.05). the microhardness of the alloys is influenced by their composition and casting method. the hardness of the ni-cr alloys was higher when they were cast with the induction/air and flame/air torch methods.
Rea??o de porta-enxertos de pessegueiro à Meloidogyne incognita
Paula, Luciane Arantes de;Bianchi, Valmor Jo?o;Gomes, César Bauer;Fachinello, José Carlos;
Revista Brasileira de Fruticultura , 2011, DOI: 10.1590/S0100-29452011000200043
Abstract: in order to evaluate the reaction of the peach rootstocks 'okinawa', 'flordaguard', 'nagano wild', and the selection 'ufpel 0402' and 'nr-0080407' to meloidogyne incognita, the plants were inoculated with 10.000 eggs+j2 of m. incognita. seedlings of tomato 'santa cruz' inoculated in the same way were used as control and to determine the inoculum viability. the experiment was carried out under greenhouse conditions in a completely randomized experimental design with five replications, each one performe by a plant. six months after inoculation, the plants were pulled out on the roots and evaluated for the number of galls and reproduction factor (rf). neither gall no nematode reproduction was registered in all rootstock systems, except for 'nagano wild' that shown 36 galls, but without evidences of nematode reproduction. all the tested genotypes were considered immune to this root-knot nematode specie, because they were effective in suppressing the m. incognita reproduction, and may be used as alternative rootstocks in new orchards or as resistance source to genetic improvement of peach rootstock.
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