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Search Results: 1 - 10 of 185356 matches for " Valdemir Alves de;Alvarenga "
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Membrana amniótica preservada em glicerina no reparo de feridas cutaneas de membros locomotores de eqüinos
Oliveira, Valdemir Alves de;Alvarenga, José de;
Ciência Rural , 1998, DOI: 10.1590/S0103-84781998000400014
Abstract: in the present experimental study, the use of the equine amniotic membrane preserved in glvcerol 98%, at room temperature, in wounds with secound intention healing of equine limbs were evaluated. surgical wounds of the size of 9.6cm2 were made on the fetiock joint, medial aspect of the proximal third of the metacarpus and lateral aspect of the medium third of the metatarsus ofboth limbs offive adult horses, making a total of thirty wounds. two experimental groups were made with fifteen wounds in each group, where one of these groups was treated with amniotic membrane, and the other, the control group, treated only with a damp gauze changed every 48 hours. in all the wounds the procedure was to evaluate the measurement of the área, degree of secretion, development of exuberant granulation tissue and the complete time of epitheliazation. bacteriologic and histopatologic exams were made in a sample of the treated and contrai groups. the biochemical determination of proteins and the identification of fibroblastic growth factor were realized in the amnionic membrane. in all the treated wounds were observed shorter healing time, less formation of exuberant granulation tissue, smaller incidence of pathogenic bacterias and a smaller increase of the wound area.
Gas Exchange and Production of Photosynthetic Pigments of Piper aduncum L. Grown at Different Irradiances  [PDF]
Fernanda Ventorim Pacheco, Helbert Rezende de Oliveira Silveira, Amauri Alves Alvarenga, Ivan Caldeira Almeida Alvarenga, José Eduardo Brasil Pereira Pinto, Jean Marcel Sousa Lira
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A3014
Abstract:

The species Piper aduncum is a plant with great economic potential, because the essential oil has antimicrobial activity and insecticides. Thus, as the light directly affects photosynthesis process, the present study evaluated the gas exchanges variables and photosynthetic pigments production of P. aduncum grown under different irradiances. Treatments consisted in environments with 100%, 70% and 50% of irradiance and environments with colored nets (red and blue). After 150 days of culture, photosynthetic activity (A), stomatal conductance (gs) transpiration rate (E), internal CO2 concentration (Ci), deficit vapor pressure (DVP), leaf temperature, concentration of internal/external CO2 (Ci/Ca), carboxylation efficiency (A/Ci) and efficiency water use (A/E) were evaluated. Pigments chlorophyll a, b, carotenoids, total and chlorophyll a

Impacts of Climate Change on the Hydrology of a Small Brazilian Headwater Catchment Using the Distributed Hydrology-Soil-Vegetation Model  [PDF]
Lívia Alves Alvarenga, Carlos Rogério de Mello, Alberto Colombo, Sin Chan Chou, Luz Adriana Cuartas, Marcelo Ribeiro Viola
American Journal of Climate Change (AJCC) , 2018, DOI: 10.4236/ajcc.2018.72021
Abstract: Climate change is one of the greatest issues for human society. The objective of this study is to assess the impacts of future climate change on seasonal average discharge and monthly water budget in a small headwater catchment, located on the Grande River basin, in Minas Gerais, Brazil. The assessment is carried out using the hydrology model, DHSVM. The atmospheric forcing to drive the Distributed Hydrology-Soil-Vegetation Model (DHSVM) is derived from the downscaling of the HadGEM2-ES projections by the Eta Regional Climate Model, at 5-km high resolution. The projections assume the RCP4.5 and RCP8.5 IPCC AR5 emission scenarios. Baseline period was taken between 1961 and 1990. The projections are assessed in three time slices (2011-2040, 2041-2070 and 2071-2099). The climate change is assessed in time slices of 30 years and in comparison against the baseline period to evaluate the hydrological changes in the catchment. The results showed differences in the hydrological behavior between the emission scenarios and though time slices. Reductions in the magnitude of the seasonal average discharge and monthly water budget may alter the water availability. Under the RCP4.5 scenario, results show greater reductions in the water availability in the first time slice, whereas under RCP8.5 scenario greater reductions are indicated in the third time slice.
Sombreamento de plantas de Catharanthus roseus (L.) G. Don 'Pacifica White' por malhas coloridas: desenvolvimento vegetativo
Melo, Anderson Adriano Martins;Alvarenga, Amauri Alves de;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000200024
Abstract: colored shade nets have been used to manipulate the vegetative development, improving the utilization of solar radiation by ornamental plants. this work aimed to study the effect of 50% reduction of par on vegetative growth of plants of catharanthus roseus (l.) g. don, using blue and red nets, and black net, in comparison to plants growing under full sunlight (lack of shading). the plants were obtained from seeds and treated for 180 days. biomass increment and distribution, pigment content (chlorophylls and carotenoids) and foliar nitrogen were evaluated. the red net caused an increase of total dry mass and total leaf area of plants when compared to the blue net, black net and the full sunlight treatment, however, except in relation to the last treatment, the red net caused lower contents of foliar nitrogen and pigments. the higher root/stem and chlorophyll a/b ratios and the lower leaf area and leaf dry mass of plants growing under full sunlight in relation to shaded plants indicate a more prominent effect of the higher irradiance than the spectral alteration. shading alters significantly the dry matter distribution and the use of shade nets of different colors affects the content of photosynthetic pigments of this species.
Nutritional Quality of Olives and Olive oil Produced in the Serra Da Mantiqueira from Brazil  [PDF]
?ngelo Albérico Alvarenga, Joyce Ludimila da Cruz, Adelson Francisco de Oliveira, Luiz Fernando de Oliveira da Silva, Emerson Dias Gon?alves, Paulo Márcio Norberto
Agricultural Sciences (AS) , 2017, DOI: 10.4236/as.2017.87039
Abstract: The olive tree (Olea europaea L.) is one of the oldest fruits grown by man. Its fruit can be processed into olive oil or treated properly and serve directly for the in natura consumption in the form of olives. Extracted from the olive, the olive oil is highly valued in the market, for its nutritional benefits and also for its unique and delicate flavor. Brazil is the second largest importer of olive oil in the world, but technology is already available and the expansion of the crop has been taking place in the south-southeast regions, where the climate is favorable, in order to serve this market. The objective of this work was to evaluate the physical and chemical qualities of the olives and characterize, sensorially and chemically, olive oils from different olive cultivars planted in the Region of Serra da Mantiqueira. The olives and olive oils produced from the cultivars Arbequina, Arbosana, Grapolo 541, Koroneiki and Maria da Fé were evaluated at the EPAMIG Experimental Field of Maria da Fé, Minas Gerais, and Brazil. In the first experiment the olives harvested in February of 2015 were analyzed in terms of weight, volume, transverse and longitudinal diameter of the fruit and the lump and the relation of the olive/lump and the chemical (protein, lipid, moisture and ashes). In the second experiment the olives were processed by the grinding, beating and centrifugation method to obtain the oils. The olive oils were analyzed for acidity, peroxide index and absorbance in the ultraviolet region at 274 nm, 270 nm, 266 nm and 232 nm. After this characterization the olive oils produced in the Serra da Mantiqueira were then submitted to sensorial analysis. The results were submitted to analysis of variance and the means were compared by the Tukey test at 5% of probability. The interpretation of the data from the sensorial analysis was done using the software sensomaker. Differences were observed between olives and olive oils produced by different cultivars in the Serra da Mantiqueira. The cultivar Grappolo 541 produces larger fruits, indicated for the preparation of olives and in natura consumption. Due to the small size of the fruit, the cultivar Maria da Fé is more suitable for olive oil production. The oils of all cultivars are within the parameters established by the Brazilian legislation in force, being classified as Extra Virgin Olive Oil. The oils of all cultivars were well accepted by consumers, especially the cultivars Maria da Fé and Grappolo 541.
Cultivation of “Roxo de Valinhos” Fig Tree in Different Plant Densities for Production of Green Figs for Industry in the Region of Campo Das Vertentes-MG  [PDF]
Paulo Márcio Norberto, ?ngelo Albérico Alvarenga, José Clelio de Andrade, Filipe Almendagna Rodrigues, Lair Victor Pereira, Emerson Dias Gon?alves
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.99076
Abstract: The objective of this work was to study the effect of different planting densities on the development and production of “Roxo de Valinhos” green figs for industry, in the Campo das Vertentes-MG region. The experiment was installed at the Risoleta Neves Experimental Field—CERN/EPAMIG. The plants used were three years old and were arranged in three randomized blocks, subject to three different planting densities, with spacings ranging from 1 m (4000 plants·ha-1), 1.5 m (2666 plants·ha-1), and 2 m (2000 plants·ha-1) between plants in the planting line and 2.5 m between row for all planting densities. The average length of the branches (m), average number of fruits per branch, average number of fruits per plant, average weight of fruits, average yield per plant and the average yield per hectare (kg) were evaluated. It was verified that, there were no significant differences in the length of branch and in the average weight of fruit, in the three densities of fig tree planting. (4000 plants·ha-1), the average number of fruits per branch (7.5), per plant (55.87) and yield per plant (878.93 kg) were lower, however. The average yield per hectare (3515.73 kg) was higher than in other growing densities. It is concluded that, the higher density of plants (4000 plants·ha-1), provides the highest productivity per area, without damages to the quality of the fruits.
Efeito da secagem, do armazenamento e da germina??o sobre a micromorfologia de sementes de Eugenia pyriformis Camb
Justo, Cristina Filomena;Alvarenga, Amauri Alves de;Alves, Eduardo;Guimar?es, Renato Mendes;Strassburg, Rosali Constantino;
Acta Botanica Brasilica , 2007, DOI: 10.1590/S0102-33062007000300004
Abstract: eugenia pyriformis camb. is a tree species of medium height that produces savory fruits with large thin-coated seeds. these seeds quickly lose viability when submitted to desiccation. our aim was to investigate embryo structure in e. pyriformis seeds and the ultra-structural changes that result from drying, germination and storage. the axis was less than 1.0 mm long, while the fleshy cotyledons varied from 1.0 to 2.0 cm. the apical and radicular meristem lie in opposing positions. there is a procambium and a medulla of parenchymatous nature, rich in starch grains. leafy primordia were identified around the stem meristem and there were unicellular trichomes and stomata on the adaxial epidermis of the cotyledons. the gradual desiccation of the seeds provoked cellular structure disarrangement, which also occurred as the seeds aged. apical meristem form changed from concave to conical during germination and the radicular hypocotyl axis became elongated, with root protrusion. in this phase, the cells have structured content and hydrolysis of reserves. seed water content variation was evaluated and the physiological consequences of this change are discussed.
A humaniza o no cuidado à parturi o
Nilza Alves Marques de Almeida,Cleusa Alves Martins,Karen Leverger Vasconcelos,Cristhiene Helena Alvarenga Rios
Revista Eletr?nica de Enfermagem , 2005,
Abstract: Este artigo trata-se de revis o bibliográfica que tece considera es reflexivas segundo a ótica de diversos autores acerca da assistência humanizada ao parto e nascimento. Discute, também, a vis o dos autores sobre a abordagem biomédica ainda desenvolvida em várias institui es hospitalares brasileiras que prestam assistência às mulheres em período gravídico-puerperal; onde permeiam condutas e atitudes consideradas intervencionistas que constituem um processo incompatível com as normas das políticas de saúde da mulher. Nesta perspectiva, a humaniza o da assistência ao parto e nascimento foi considerada como essencial no processo de cuidar da parturiente. Desse modo, concebemos que o cuidado na parturi o é importante, devendo ser internalizado e vivenciado por profissionais de saúde da área.
Invertase and sucrose synthase activities in coffee plants sprayed with sucrose solution
Silva José Carlos da,Alves José Donizeti,Alvarenga Amauri Alves de,Magalh?es Marcelo Murad
Scientia Agricola , 2003,
Abstract: One management practice of which the efficiency has not yet been scientifically tested is spraying coffee plants with diluted sucrose solutions as a source of carbon for the plant. This paper evaluates the effect of foliar spraying with sugar on the endogenous level of carbohydrates and on the activities of invertase and sucrose synthase in coffee (Coffea arabica L.) seedlings with reduced (low) and high (normal) levels of carbon reserve. The concentrations used were 0.5 and 1.0% sucrose, and water as a control. The use of sucrose at 1.0% caused an increase in the concentration of total soluble sugars in depauperate plants, as well as increased the activity of the following enzymes: cell wall and vacuole acid invertase, neutral cytosol invertase and sucrose synthase. In plants with high level of carbon reserve, no increments in total soluble sugar levels or in enzymatic activity were observed. Regardless of treatments or plants physiological state, no differences in transpiration or stomatal conductance were observed, demonstrating the stomatal control of transpiration. Photosynthesis was stimulated with the use of 0.5 and 1.0 % sucrose only in depauperate plants. Coffee seedling spraying with sucrose is only efficient for depauperate plants, at the concentration of 1.0%.
Physiological, morphological and biochemical characteristics of the sexual propagation of Piper aduncum (Piperaceae)
Dousseau, Sara;Alvarenga, Amauri Alves de;Alves, Eduardo;Chaves, Izabel de Souza;Souza, Elma dos Santos;Alves, Juliana da Silva;
Brazilian Journal of Botany , 2011, DOI: 10.1590/S0100-84042011000300005
Abstract: in this work we attempted to characterize the diaspores and the germination process of piper aduncum l., as well as to verify the influence of the interaction between presence and absence of light (photoperiod of 12 hours and dark) and temperature (25 °c, 30 °c and 20-30 °c) and also of gibberellin (0, 50, 100, 200 and 400 mg l-1) on the root protrusion and normal seedlings formation. the diaspores are very small with a thousand seed weight of 0.3645 g, 13% moisture and protein reserve. diaspores are strict positively photoblastic in the tested temperature range and the optimum temperature for root protrusion was 30 °c, while for normal seedlings was 25 °c. the previous permanence in the dark led to an increase in the speed of root protrusion and percentage and speed of seedling formation. the application of gibberellic acid negatively interfered with the protrusion and growth of the radicle while favoring the elongation of hypocotyls.
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