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Search Results: 1 - 10 of 168215 matches for " E. Alcantara "
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Accessing the Potential of Satellite and Telemetric Data to Evaluate the Influence of the Heat Flux Exchange in the Water Column Mixing and Stratification  [PDF]
Enner Alcantara
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.325092
Abstract: The objective of this work is to evaluate the feasibility of moderate resolution satellite data estimating the surface heat balance in a tropical hydroelectric reservoir. Each component of the heat flux balance was computed using the MODIS (Moderate Resolution Imaging Spectroradiometer) water surface temperature (WST) level 2, 1 km nominal resolution data (MOD11L2, version 5) from 2003 to 2008. The consequence of the heat flux exchange in the water column thermal structure is also investigated. The passage of cold front over a region decreases the atmospheric pressure and air temperature, enhancing the relative humidity. The sensible flux presents a small variability but an increase occurs due to a convective turbulence caused by front passage. The latent flux decrease but insufficiently to cause a condensation, just the evaporation decreases. The upwelling events are the responsible to maintain the loss of heat after the cold front pas- sage.
Twenty years of research on cholesteric lyotropic liquid crystals at the Chemistry Institute of the University of S?o Paulo
Alcantara, M. R.;Fernandes Jr., E. G.;
Brazilian Journal of Physics , 2002, DOI: 10.1590/S0103-97332002000300009
Abstract: in this paper we present a review of twenty years of research on cholesteric liquid crystals at the chemistry institute of the university of s?o paulo. the results on the interaction forces, responsible for the maintenance of the helical structure, are a function of the chemical variability obtained in these systems. the last results obtained using rheological techniques are presented, and research in this field was undertaken in order to understand the cholesterization process when different systems and inductors are involved.
Twenty years of research on cholesteric lyotropic liquid crystals at the Chemistry Institute of the University of S o Paulo
Alcantara M. R.,Fernandes Jr. E. G.
Brazilian Journal of Physics , 2002,
Abstract: In this paper we present a review of twenty years of research on cholesteric liquid crystals at the Chemistry Institute of the University of S o Paulo. The results on the interaction forces, responsible for the maintenance of the helical structure, are a function of the chemical variability obtained in these systems. The last results obtained using rheological techniques are presented, and research in this field was undertaken in order to understand the cholesterization process when different systems and inductors are involved.
The turbidity behavior in an Amazon floodplain
E. Alcantara,E. Novo,J. Stech,J. Lorenzzetti
Hydrology and Earth System Sciences Discussions , 2009,
Abstract: The main objective of this study is to understand the turbidity behavior of an Amazon Floodplain Lake. Observations of turbidity provide quantitative information about water quality. However, the number of available in situ measurements for water quality determination is usually limited in time and space. Here, we present an analysis of the temporal and spatial variability using two approaches: (i) the first is based on wavelet analysis of a turbidity time series measured by an automatic monitoring system; (ii) the second is based on turbidity samples measured in different locations and then interpolated by an ordinary kriging algorithm. The space/time turbidity variability is clearly related to the Amazon River flood pulses in the floodplain. When the water level in the floodplain is rising or receding, the exchange between the Amazon River and the floodplain is the major driving force in turbidity variability. At high water level, the turbidity variability is controlled by the lake bathymetry. Finally, when the water level is low, the wind action and lake morphometry are the main causes of turbidity variability. The combined use of temporal and spatial data showed a great potential for understanding the turbidity behavior in a complex aquatic system, like the Amazon floodplain.
Biochemical and isoenzyme analyses of elephant grass, Pennisetum purpureum (Schum) varieties
Bach, E.E.;Alcantara, V.B.G.;Alcantara, P.B.;Veasey, E.A.;
Scientia Agricola , 1995, DOI: 10.1590/S0103-90161995000300019
Abstract: this study characterized seven pennisetum purpureum varieties, namely v. an?o, bajra, cameroon, gua?u, roxo, taiwan a-144 and uruckwami, through biochemical analyses, including protein, glucose and fructose contents, and polyacrylamide gel electrophoresis using the esterase system, by sampling 30, 60, 90, 120 and 150 day-old leaves. the number of nodes per stem and the percentage of bud emergence were also recorded. variety taiwan a-144 presented the highest number of nodes per stem and percentage of emerging buds. protein concentration decreased gradually after 60 days for all varieties, except for an?o. variety gua?u presented the highest level of glucose in 90 day-old plants, whereas cameroon presented the highest levels at 120 and 150 days. the esterase band patterns changed with plant age for all varieties, showing a tendency to increase the number of bands with time. the best age for discriminating between esterase bands of p. purpureum varieties was at 120 days, when most variation could be observed.
Topografía y Biometría del Sistema Venoso Coronario y de sus tributarias
Sousa-Rodrigues,C. F.; Alcantara,F. S.; Olave,E;
International Journal of Morphology , 2005, DOI: 10.4067/S0717-95022005000200013
Abstract: the coronary sinus (sc) is the main end of the cardiac veins, being the principal vein of the heart, draining all its blood, except that driven by the anterior cardiac veins and the minimum cardiac veins. its location is well-defined in the posterior portion of the coronary sulcus between left atrium and ventricle. its direct tributaries are the cardiac veins: magna (vcm), media (vcme), parva (vcp), oblique of the left atrium (voae), posterior veins of the left ventricle (vpve). the diameter in the middle of the distal third of the coronary sinus ranged from 4 to 10 mm (mean 6,34 mm); about its medium third, such value ranged from 7 to 14 mm (mean 9,13 mm) and in its proximal third, its diameter ranged from 5 to 16 mm (mean 9,28 mm). its length ranged from 27 to 54 mm (mean 40,3 mm). in 26 hearts (100 % of the cases), the vcm continued into the sc in its left side; in 22 cases (84,6%), the voae flowed into its left third; in the remaining 4 (15,4%), it was absent; the sc received the left marginal vein in 3 hearts (11,5%). in 26 cases (100%), the vcme discharged in the right extremity of the sc; in 16 hearts (61,5%), some vpve drained into the left third of the sc, in these there was 1 vpve in 10 (38,5%), 2 vpve in 4 (15,3%) and 3 vpve in 2 (7,7%). in 23 hearts (88,5%), some vpve discharged in the middle third of the sc; in these, there was 1 vpve in 15 cases (57,7%) and 2 vpve in 8 (30,8%). in 21 hearts (80,8%), some vpve drained into the right third of the sc, in these, there was 1 vpve in 14 (53,9%), 2 vpve in 5 (19,2%), 3 vpve in 2 (7,7 %). one of the most polemic aspects in the study of the coronary sinus is its own biometry, contributing to this divergence the absence of a standart location to its beginning and a pattern on tributaries disposition
Plantas daninhas em mandiocais (Manihot esculenta Crantz) na regi?o mineradora de Diamantina (Alto Jequitinhonha), Minas Gerais
Alcantara, E.N. de;Carvalho, D.A. de;
Planta Daninha , 1983, DOI: 10.1590/S0100-83581983000200007
Abstract: a survey of weeds occurring in cassava crops was carried out in the mining region of diamantina, mg. the counties of carbonita, itamarandiba and capelinha were used in the survey and considered to be representative of the region. the degree of abundance and the frequency of weed species were determined. the weeds were identified and most of them are being preserved in the herbarium esal, of the escola superior de agricultura de lavras, mg. the results showed the occurrence of 45 weed species belonging to 19 families, being 16 dycots, 2 monocots and 1 pteridophyta. the families compositae, gramineae, malvaceae, leguminosae, rubiaceae and convolvulaceae and the species acanthospermum australe, sida rhombifolia e borreria alata occurred with high frequency.
Topografía y Biometría del Sistema Venoso Coronario y de sus tributarias Topography and Biometry of the Coronary Venous System and its Tributaries
C. F. Sousa-Rodrigues,F. S. Alcantara,E Olave
International Journal of Morphology , 2005,
Abstract: El seno coronario es la principal terminación de las venas cardiacas, recibiendo toda su sangre, excepto aquella conducida por las venas cardíacas anteriores y venas cardíacas mínimas.Está localizado en la porción posterior del surco coronario, entre el atrio y ventrículo izquierdos. Sus afluentes directos son las vv cardiacas magna (VCM), media (VCMe), parva (VCP), oblicua del atrio izquierdo (VOAI) y posteriores del ventrículo izquierdo (VPVI). Estudiamos el seno coronario y sus afluentes en 26 corazones de cadáveres de individuos brasile os, adultos, de ambos sexos, con el propósito de obtener datos biométricos del mismo. El calibre en la parte central del tercio izquierdo del seno coronario varió entre 4 y 10 mm, con un promedio de 6,34mm; el del tercio medio varió entre 7 y 14 mm, con un promedio de 9,13mm y en el tercio derecho, a nivel de su desembocadura, varió entre 5 y 16 mm con promedio de 9,28mm. Su longitud se ubicó entre 27 y 54 mm, con un promedio de 40,3 mm. En todos los corazones la VCM se continuó con el extremo izquierdo del seno coronario. En 22 de ellos (84,6%), la VOAI desembocó en su tercio izquierdo y en los 4 restantes ésta estuvo ausente. El seno coronario recibió la vena marginal izquierda en 3 casos (11,5%). En todos los casos, la VCMe desembocó en el tercio derecho del seno. En 16 casos (61,5%) alguna VPVI desembocó en su tercio izquierdo.De éstos, hubo una VPVI en 10 corazones (38,5%), dos VPVI en 4 (15,3%) y tres VPVI en 2 (7,7%). En 23 corazones (88,5%), alguna VPVI lo hizo en su tercio medio y de estos casos, una VPVI terminó en 15 (57,7%) y dos VPVI en los 8 restantes (30,8%). En 21 casos (80,8%) alguna VPVI terminó en su tercio derecho y de éstos, se observó una VPVI en 14 corazones (53,9%), dos en 5 (19,2%) y tres en 2 (7,7%). La biometría del seno coronario es muy variable, así como la disposición de sus tributarias, por lo que esperamos que los datos obtenidos sirvan de soporte morfológico a la anatomía quirúrgica del corazón The coronary sinus (SC) is the main end of the cardiac veins, being the principal vein of the heart, draining all its blood, except that driven by the anterior cardiac veins and the minimum cardiac veins. Its location is well-defined in the posterior portion of the coronary sulcus between left atrium and ventricle. Its direct tributaries are the cardiac veins: magna (VCM), media (VCMe), parva (VCP), oblique of the left atrium (VOAE), posterior veins of the left ventricle (VPVE). The diameter in the middle of the distal third of the coronary sinus ranged from 4 to 10 mm (mean 6,34 mm); about its
Project ‘play and tell’: occupational therapy in primary health care
Débora Barbosa e Alcantara,Cristiane Miryam Drumond de Brito
Cadernos de Terapia Ocupacional , 2012,
Abstract: This paper reports the experience of a “storytelling and playing” group that took place in a FamilyHealth Unit in Sao Carlos, State of Sao Paulo. The group was formed as from the evaluation of the occupationaltherapist in the context of Primary Health Care, which broadly considers the daily lives of the actors involved:children, one user of the system, and the health team. From the viewpoint of Occupational Therapy, with focuson the problems of the territory, interventions linking the following matters were proposed: individual care,collective care, and co-responsibility of the community and staff in pursuit of the resignificance of the everydaylives of the actors involved. This is a concrete example of paradigm shift from the existing health model to theprecepts of the Family Health Strategy, with the involvement of users and professionals from various areas.The occupational therapist identified different demands of the territory: the need for transformation of dailylife and routine of a user; the need for children’s leisure; and the desire of the health team to build this spacethrough a playroom. The possible combination of the user, children and the team’s everyday realities composedan intervention project based on the vision of the clinic expanded. The “playing and storytelling” was able toactually transform the health care model.
Effects of Five Years Adoption of No-Tillage Systems for Vegetables Crops in Soil Organic Matter Contents  [PDF]
Carlos E. P. Lima, ítalo M. R. Guedes, Juscimar da Silva, Flávia A. Alcantara, Nuno R. Madeira, Agnaldo D. F. Carvalho, Mariana R. Fontenelle
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.91009
Abstract: Vegetables productions systems are done normally with intense soil tillage causing a strong decline of soil quality. Use of conservation systems can be an alternative to recover this quality. In order to evaluate the effects of such systems on soil organic matter, an experiment has been conducted in randomized blocks design and factorial scheme 3 × 2: three soil management systems (no-tillage; reduced tillage and conventional tillage) and two cover crops (maize single; and intercropping maize with gray velvet bean—Stizolobium niveum); and repeated measures over time. Soil samples were collected before the implementation of the experiment and at the end of each crop cycle until the fifth crop cycle. Carbon associated with humic substances is also determined in 0 - 5 cm, 5 - 10 cm and 10 - 30 cm at the end of the last crop cycle. The SOM content was higher in RT (48.34 g·kg-1) than in the CT (39.48 g·kg-1) at the end of the fifth crop cycle. SOM content in NT (44.92 g·kg-1) was statistically equal to RT and CT, during the same period. In 0 - 5 cm, carbon contents associated to the humic substances present the same behavior of SOM contents in 0 - 10 cm. Probably these results are associated with the capacity of each system to improve superficial contents of SOM stable fractions. It follows that the conservation systems used are alternatives to the cultivation vegetables in order to improve soil organic matter contents.
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