03.1 - Graduação (UAST)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2926
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Item Comportamento de sementes de Mimosa tenuiflora (Willd.) Poir, submetidas a aplicação do campo magnético e estresse salino(2023-04-24) Souza, Gleyson Rodrigues de; Silva Junior, Luiz Carlos da; http://lattes.cnpq.br/6998910214479890; http://lattes.cnpq.br/7632781944679348The influence of the magnetic field on living organisms is a question that intrigues humanity for centuries. The advancement of our knowledge in this area of science makes it possible for us to understand that the action of magnetism causes positive or negative effects in a series of organisms. In recent years, we have been searching for techniques that promote the best development of two plants that have gained proeminence on the entire planet, mainly for the reforestation of native areas. Considering that currently about 20% of the irrigated area suffers from saline stress, the present work sought to analyze the relationship between the intensity of two magnetic fields in comparison to different levels of salinity in the germination of Mimosa tenuiflora (Willd.) Poir. The work was developed in the Laboratory of Energy, Physics and Mathematics of UFRPE-UAST, in two stages. The first from November 20 to 23, 2022 and the second from February 14 to 25, 2023. Foram provided in the first stage four intensity treatments of magnetic field (0 T , 0, 1 T , 0, 14 T and 0, 45 T ) and three levels of salinity (1, 42 dS/m, 4, 01 dS/m and 4, 32 dS/m), for In the second stage, four treatments of magnetic field intensities (0 T , 0, 18 T , 0, 24 T and 0, 45 T ) and three salinity levels (8, 86 dS/m, 13, 78 dS/m and 13, 78 dS/m). In the case of the study on the effects of two different levels of salinity on the germination and development of plants, the choice of delineation in casualized blocks with two repetitions allowed the division of the experimental units in blocks, according to characteristics that could influence our results, such as the intensity of the magnetic field. The germination measurements were carried out daily, after four days of germination the radicle and hypocotyl capsules were measured. Our results show that: 1) In the first stage of the experiment, in the first 48 h, continuous exposure to the magnetic field at an intensity of 0, 1 T was able to attain 90% of germination in comparison with the control that has 80% for salinities of 1, 42 dS/m and 4, 01 dS/m and at a concentration of 4, 32 dS/m the germination rates decreased as the field increased. 2) The compression of the radicle for a salinity of 1, 42 dS/m obtains greater compression as the magnetic field increases. 3) In the second stage of the experiment, in the first 48 h, continuous exposure to the magnetic field at an intensity of 0, 1 T and 0, 45 T will achieve 10% germination reduction compared to the control that has 0% for a salinity of 13, 78 dS/m and at a concentration of 18, 41 dS/m only the seeds exposed to the field of 0, 1 T germinate at a taxa of 2, 5%. 4) In the same band of salinity of 8, 86 dS/m with the increase in field intensity to the radicle and the hypocotyl reaching larger compressions. Demonstrating that viii the application of the magnetic field influences the germination rate and the physiology of seedlings.The influence of the magnetic field on living organisms is a question that intrigues humanity for centuries. The advancement of our knowledge in this area of science makes it possible for us to understand that the action of magnetism causes positive or negative effects in a series of organisms. In recent years, we have been searching for techniques that promote the best development of two plants that have gained proeminence on the entire planet, mainly for the reforestation of native areas. Considering that currently about 20% of the irrigated area suffers from saline stress, the present work sought to analyze the relationship between the intensity of two magnetic fields in comparison to different levels of salinity in the germination of Mimosa tenuiflora (Willd.) Poir. The work was developed in the Laboratory of Energy, Physics and Mathematics of UFRPE-UAST, in two stages. The first from November 20 to 23, 2022 and the second from February 14 to 25, 2023. Foram provided in the first stage four intensity treatments of magnetic field (0 T , 0, 1 T , 0, 14 T and 0, 45 T ) and three levels of salinity (1, 42 dS/m, 4, 01 dS/m and 4, 32 dS/m), for In the second stage, four treatments of magnetic field intensities (0 T , 0, 18 T , 0, 24 T and 0, 45 T ) and three salinity levels (8, 86 dS/m, 13, 78 dS/m and 13, 78 dS/m). In the case of the study on the effects of two different levels of salinity on the germination and development of plants, the choice of delineation in casualized blocks with two repetitions allowed the division of the experimental units in blocks, according to characteristics that could influence our results, such as the intensity of the magnetic field. The germination measurements were carried out daily, after four days of germination the radicle and hypocotyl capsules were measured. Our results show that: 1) In the first stage of the experiment, in the first 48 h, continuous exposure to the magnetic field at an intensity of 0, 1 T was able to attain 90% of germination in comparison with the control that has 80% for salinities of 1, 42 dS/m and 4, 01 dS/m and at a concentration of 4, 32 dS/m the germination rates decreased as the field increased. 2) The compression of the radicle for a salinity of 1, 42 dS/m obtains greater compression as the magnetic field increases. 3) In the second stage of the experiment, in the first 48 h, continuous exposure to the magnetic field at an intensity of 0, 1 T and 0, 45 T will achieve 10% germination reduction compared to the control that has 0% for a salinity of 13, 78 dS/m and at a concentration of 18, 41 dS/m only the seeds exposed to the field of 0, 1 T germinate at a taxa of 2, 5%. 4) In the same band of salinity of 8, 86 dS/m with the increase in field intensity to the radicle and the hypocotyl reaching larger compressions. Demonstrating that the application of the magnetic field influences the germination rate and the physiology of seedlings.Item Acompanhamento das atividades de assistência técnica e extensão rural no IPA - Serra Talhada(2019) Oliveira, Cibely Ferreira de; Simplício, Josimar Bento; http://lattes.cnpq.br/1876691945804390; http://lattes.cnpq.br/2451690212011839Item Estudo comparativo dos preceitos propostos por duas correntes de pensamento: o caso da economia verde e agroecologia(2019) Silva, Mariany Barbosa da; Silva, Filipe Lima; http://lattes.cnpq.br/0793640526993320In this paper, the discussion involves two streams of thought or conceptions of analysis on sustainable development cataloged from their references to apparently different economic models, but inserted in the same economic system, which present mediate discrepancies between their concepts, namely agroecology and the green economy. From this problem we have as a general objective: Analyze the discrepancies and convergences between the concepts brought by the principles of agroecology and the green economy in the productive processes that involve pluriactivity, multifunctionality and subsistence production of family agriculture. And while specific objectives: 1) Map the discursive structure of the classic concepts of green economy and agroecology; 2) To structure a comparative framework on sustainability before agroecological and green economy projects. The main characteristics of the green economy are the low carbon emission, efficiency in the use of resources and search for social inclusion. Parallel to this is agroecology, a science (and philosophy of life) whose main characteristic is the production of healthy and natural foods. Both the green economy and agroecological production are aimed at practices that lead to sustainable development, which is explained by a better quality of life.Item Cenário do mercado regulado de MDL no nordeste do Brasil(2019) Gonçalves, Raphaella Lima; Freire Junior, Luciano Galvão; http://lattes.cnpq.br/0044703870148646; http://lattes.cnpq.br/3019799894396625Throughout this work a descriptive study was carried out, using bibliographical research from secondary sources. The book discusses the economic theory behind the carbon market, the evolution of the economic approach to economic-environmental development, and the estimation of the emission of greenhouse gases (GHGs) in Brazil, by economic sector. It was verified that after the Kyoto treaty three mechanisms of flexibilization were created to control the emission of these gases: Emissions Trading, Joint Implementation and the Clean Development Mechanism (CDM). Only in the latter is it possible for countries in that have ratified the protocol, such as Brazil. The CDM is project-based. Certified Emission Reductions (CERs), which are marketed, are issued with the registration and monitoring of these, each CER corresponding to one tonne of carbon equivalent that is no longer emitted or has been mitigated from the atmosphere. The logic behind this is that the gases are transboundary, so it is a matter of social relevance, and this mitigation occurring anywhere on the planet is beneficial as a whole. The objective is to demonstrate a more illuminating literature on the economic theories behind environmental markets, and specifically the Clean Development Mechanism (CDM) Carbon Credit Regulated Market. Also, view GHG emissions in Brazil. It was also analyzed the number and types of projects related to this theme, implemented in the Northeast Region. It was verified that the highest percentage of GHG emissions in Brazil comes from agricultural activities, as evidenced by economic activities in agriculture and in much of the land use change sector.Item Berçário de camarão Litopenaeus vannamei(BONNE, 1931) cultivado em água oligohalina com tecnologia de biofloco sob diferentes densidades de estocagem(2018) Silva, Weverson Ailton da; Silva, Ugo Lima; http://lattes.cnpq.br/1858876631961029; http://lattes.cnpq.br/8320689687057292The present work evaluated the culture of the marine shrimp Litopenaeus vannameiin the nursery stage submitted to different storage densities in a biofloco system. The cultivation of post-larvae of L. vannameimarine shrimp in biofloc technology was carried out at the Laboratory of Experimentation of Aquatic Organisms of the Federal Rural University of Pernambuco (UFRPE), during the 28-day period. A completely randomized design with three treatments was adopted: D2: 2 shrimps. L-1, D4: 4 shrimps. L-1and D6: 6 shrimps. L-1, with four replicates. Twelve tanks with a useful volume of 15 L of water were used. As post-larvae with initial weight 0.005 ± 0.001 g were fed commercial feed containing 40% crude protein, with a frequency of 3 times a day and feed rate of 10% of the biomass. Fertilizations were done with the daily use of the maintenance schedule of 15: 1 (C: N). During the cultivation were monitored as having success and were identified the types of light and temperature (ºC), dissolved oxygen (mg L-1), conductivity (μS Cm-1), salinity (g L-1), pH, total dissolved solids, total ammoniacal nitrogen (N-NAT), nitrite (N-NO2), nitrate (N-NO3), inorganic phosphate (P-PO4), sedimentable solids (SS) and alkalinity. The performance of the post-larvae was obtained through the comparison of final weight (mg), survival (%), food replacement factor (FCA), condition index, TCE (% -1) and weekly growth (mg). Differences were found not to be a factorof feed conversion and of post-larvae production. Despite the final weight values, survival and weekly evolution differed significantly between treatments (P> 0.05). The results of the results, with respect to one crop were reached when cultivated in the post-larvae of 4 post-larvae L-1, as it was in many treatments (P <0.05). Biofloc technology is a good alternative for the shrimp nursery, bringing high productivity and greater sustainability, especially in semi-arid regions with little availability of water. The adoption of storage densities from 2000 to 6,000 PL. m-3of L. vannameidid not significantly influence the physical chemical variables of water quality.Item Efeito de densidades de estocagem na disponibilidade de alimento natural em berçário de camarão Litopenaeus vannamei (Boone, 1931) cultivado com tecnologia de biofloco(2018) Santos, Jorge Luiz da Silva; Silva, Ugo Lima; http://lattes.cnpq.br/1858876631961029; http://lattes.cnpq.br/3650685131155739The objective of this work was to determine the main components of planktonic food in the nursery of shrimp L. vannameiwith biofloc technology. The experiment was carried out for 28 days and a randomized design with three post-larval storage densities, D2: 2 PLs. L-1, D4: 4 PLs. L-1and D6: 6 PLs.L-1, with four replicates each, using molasses as carbon source, in the C: N ratio of 15: 1. Samples were collected weekly, with 2 liters of water in each tank, which were filtered with plankton net and concentrated in 250 mL. The qualitative and quantitative study of plankton with 1 mL sub-samples for zooplankton was carried out in the Sedgwick-Rafter chamber (ind.L-1). The phytoplankton was evaluated in slides and coverslips (nº cells.mL-1) analyzing 0,1 mL, bothunder light microscope. The temperature values remained close to 22 ° C, below the ideal temperature for L. vannameicultivation, since the appropriate range for this species is between 26 to 33ºC, but the dissolved oxygen was in the ideal conditions for its culture, which should be above 4.0 mg.L-1and during the experiment remained above 8 mg.L-1. The development of shrimp did not show any difference between the treatments, for the final weight variable, since the survival, the D2treatment obtained the highest survival (> 72%) and the production in D6was higher than in the other treatments (2.98 Pls.L-1). The zooplankton community in the nursery tanks was represented by 23 genera, distributed among the groups Rotifera, Protozoa, Nematoda, Platelmintos and Cladocera. The Protozoa group presented the most diversification, regardless of the treatment, and also presented the highest abundance (> 66%). The main genera of Protozoa were Aspidisca, Euplotesand Trinema, and the phytoplankton community was composed of 16 genera, distributed in the classes Chlorophyceae, Bacillariophyta, Cyanophyceaeand Dinophyceae, the dominant class was Bacillariophyta(> 41%), with the genera Naviculaand Cyclotella. The density of 4 PL.L-1gave the highest density of zooplankton, but for the phytoplankton the density of 6 PLs.L-1was the one with the highest amount.Item Síntese do pigmento CoCr2O4 pelo método de gelatina comercial(2018) Sousa, Tassia Pereira de; Câmara, Maria Suely Costa da; http://lattes.cnpq.br/9163311260887432; http://lattes.cnpq.br/7879045291487919There is a growing interest of the ceramic industries in developing more stable pigments that are low cost and little environmental damage. The ceramic industries mainly use pigments of predominantly inorganic nature, such pigments are the most used because they havean excellent chemical and thermal stability besides a lower toxicity to the man and few environmental damages. The most commonly used inorganic pigments used in ceramics are mixed oxides with spinel structure and AB2O4. Spinels are one of the most interesting crystalline structures in the development of stable and chemically inert pigments. In this structure, ions of different oxidation states are present in both tetrahedral and octahedral sites. In addition, there are several ways of arranging the cationsat these sites (normal and inverse spinel). These characteristics led to the development of different colors, being these intense and stable, suitable for use as pigments. Among the compounds used as ceramic pigments, we have highlighted CoCr2O4which is a mineral oxide belonging to the group of spinel, such structures cover a group of well-establishedmagnetic materials that may have a green coloration. The objective of the present work was to synthesize the CoCr2O4pigment using commercial gelatin as precursor and to characterize the following techniques: Thermogravimetric analysis (TG), Xray diffraction (XRD), surface area (BET), Scanning electron microscopy (SEM) spectroscopy in the infrared region (FTIR), and colorimetric measurements by the CIEL*a*b*method. The route of synthesis used was confirmed viable from the results. Crystalline, monophasic and high surface area compounds were obtained. The powders presented green coloration with phase obtained from 500 ºC.Item Alilação do tipo Barbier de Aldeídos aromáticos promovida por Zn e catalisada por L-Prolina em meio aquoso(2019) Souza, Fabrícia Aparecida Marques de; Silva, Renato Augusto da; http://lattes.cnpq.br/5111987334920733; http://lattes.cnpq.br/0102375050840904Given the various strategies to form C-C bonding, involving organometallic intermediates, the Barbier reaction has proved to be an important methodology that can be performed efficiently in aqueous media with several advantages.The use of organocatalysts has also been very advantageous in various chemical reactions to a synthesis of safe and environmentally correct products.In this work, synthetic methodologies were studied to obtainhomoallyl alcoholsby means of alilation of the Barbier type. In order to follow the principles of green chemistry, the method relies on allylation reactions from aromatic aldehydes, allyl bromide, zinc and L-proline as catalyst, using water as the solvent. Aromatic aldehydes with allyl bromide, zinc and a 20% L-proline as catalyst were tested, being 4-F-benzaldehyde, 4-OMe-benzaldehyde and 2-naphthaldehyde using water as the solvent. Secund, the increase in the amount of L-proline to 80% was added and 3 aromatic aldehydes were tested, being 4-F-benzaldehyde, 2-OH-benzaldehyde and 2-OMe-benzaldehyde with allyl bromide, zinc and water. All data were previously monitored by CG-FID and CCD and the homoallyl alcoholswere characterized from the respective signals by GC-MS, throughcomputerized comparison of the library masses of the apparatus itself and the specific fragmentation pattern.In the first 3, with 20% L-proline, excellent conversions were detected, but 4-F-benzaldehyde was fully converted to 1-(4-fluorophenyl) but-3-en-1-ol with only 1h of magnetic stirring , 4-OMe-benzaldehyde converted to 1-(4-methoxyphenyl) but-3-en-1-ol with 4h and 2-naphthaldehyde converted to 1-(2-naphthyl) but-3-en-1-ol with 1h, in all cases, without formation of by-products. Subsequently, in the last 3 assays, with 80% proline L, the reaction time of 4-F-benzaldehyde was reduced to 30 minutes with complete conversion of the 1-(4-fluorophenyl) but-3-en-1-ol alcohol; 2-OH-benzaldehyde and 2-OMe-benzaldehyde were converted respectively into 1-(2-hydroxyphenyl) but-3-en-1-ol and 1-(2-methoxyphenyl) but-3-en-1, however, traces of the starting materials were still detected. The 1-(4-fluorophenyl) but-3-en-1-ol and 1-(2-naphthyl) but-3-en-1-ol alcohols were also characterized by 1 H and ¹³C NMR.