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Agora exibindo 1 - 20 de 2087

2.4-Dichlorophenoxyacetic acid and sucrose in rhizogenesis maintenance and induction in cuttings of cagaita and mangabeira from cerrado
(2020-03) Vieira, Muza do Carmo; Souza, Jaqueline Lima da Conceição; Silva, Gilson Dourado da; Pereira, Caio César de Oliveira; Pereira, Wellington José; Souza, Eli Regina Barboza de
The Cerrado has a vast diversity of fruit plant species. Among them, the cagaita and mangabeira trees stand out because of their fruits nutritional potential. They propagate through seeds, a method that generates genetically distinct plants. Thus, it would be of interest to propagate these plants through vegetative propagation techniques aiming to select superior and identical genotypes from the mother plant. Therefore, the objective was to establish a methodology for maintenance, survival, and rooting induction of Eugenia dysenterica and Hancornia speciosa var. pubescens in nutrient solution with different sucrose concentrations added with 2.4-dichlorophenoxyacetic auxin (2.4-D). In the cagaita and mangabeira tree cuttings, five sucrose concentrations were evaluated: 0, 5, 10, 15, and 20% for the first; and 0, 10, 20, 30, and 40 % for the second species. In addition to these, the control was deionized water. To the sucrose solution was added 190 g L-1 NH4NO3, Ca3ClO, K2SO 4, and 3.00 mg L -1 of 2.4-D. We also performed a second test for cagaita tree, which was evaluated different doses of 2.4-D: 0, 0.5, 1.0, 1.5, and 2.0 mg L-1; and control (deionized water). In all experiments, the completely randomized design was used. We collected data on survival, contamination, cuttings with permanent leaves, base oxidation, callus formation, and root starts. In the first cagaita tree experiment, cuttings survival was higher than 80%. In the second trial, the use of 2.4-D did not favor the survival of the cuttings, nor did it promote the formation of root starts. For mangabeira was observed survival values of 100% in all treatments evaluated, and root starts were also found in its herbaceous cuttings.
A feasibility cachaca type recognition using computer vision and pattern recognition
(2016-04) Rodrigues, Bruno Urbano; Soares, Anderson da Silva; Costa, Ronaldo Martins da; Van Baalen, Jeffrey; Salvini, Rogério Lopes; Silva, Flávio Alves da; Caliari, Márcio; Cardoso, Karla Cristina Rodrigues; Ribeiro, Tânia Isabel Monteiro; Delbem, Alexandre Cláudio Botazzo
Brazilian rum (also known as cachaça) is the third most commonly consumed distilled alcoholic drink in the world, with approximately 2.5 billion liters produced each year. It is a traditional drink with refined features and a delicate aroma that is produced mainly in Brazil but consumed in many countries. It can be aged in various types of wood for 1–3 years, which adds aroma and a distinctive flavor with different characteristics that affect the price. A research challenge is to develop a cheap automatic recognition system that inspects the finished product for the wood type and the aging time of its production. Some classical methods use chemical analysis, but this approach requires relatively expensive laboratory equipment. By contrast, the system proposed in this paper captures image signals from samples and uses an intelligent classification technique to recognize the wood type and the aging time. The classification system uses an ensemble of classifiers obtained from different wavelet decompositions. Each classifier is obtained with different wavelet transform settings. We compared the proposed approach with classical methods based on chemical features. We analyzed 105 samples that had been aged for 3 years and we showed that the proposed solution could automatically recognize wood types and the aging time with an accuracy up to 100.00% and 85.71% respectively, and our method is also cheaper.
A galactose-rich heteropolysaccharide extracted from “jaboticaba” (Plinia cauliflora) peels
(2020-12) Miranda, Bruna  Melo; Leal, Maria Carolina Bezerra Di Medeiros; Batista, Karla de Aleluia; Carbonero, Elaine Rosechrer; Fernandes, Kátia Flávia; Silva, Flávio Alves da
The objective of this work was to extract, identify and characterize a galactose-rich heteropolysaccharide (GH) from “jaboticaba” peel. The best conditions to extract the GH according to a 23 full-factorial experimental design were 90 °C/30 min/pH 1.0, resulting in a 32.32 % yield using lyophilized sample. The chemical structure analyzed by GC/MS and NMR spectra (HSQC/HSQC-TOCSY) showed that the main chain of GH consists of a (1→4) galactoside branched at carbon 3, containing galactose (67.21 %), glucose (15.78 %), arabinose (9.78 %), rhamnose (2.26 %) and traces of esterified and non-esterified uronic acids. Rheological studies revealed that GH suspensions behave as a Newtonian fluid, with calculated molecular mass of 1.48 × 105 Da. The absolute viscosity of 1 % (w/v) aqueous suspension of GH decreased from 25 mPa s to 10 mPa s in NaCl and 7 mPa s in CaCl2, indicating the polyelectrolyte character of GH.
A geostatistical assessment of the natural and anthropogenic factors that influence groundwater quality in the Beberibe aquifer in northeastern Brazil
(2022) Silva, Marcos Vinícius da; Moraes, Alex Souza; Pandorfi, Héliton; Oliveira Júnior, José Francisco de; Silva, Jhon Lennon Bezerra da; Batista, Pedro Henrique Dias; Jardim, Alexandre Maniçoba da Rosa Ferraz; Almeida, Gledson Luiz Pontes de; Santana, Taize Calvacante; Mesquita, Marcio
The chemical composition of groundwater from the Beberibe aquifer located in the Northeast of Brazil (NEB) was assessed using geostatistical, geoprocessing, and multivariate analysis techniques. The data collected came from 34 georeferenced mining and mineral water production units. From this, a Piper diagram was constructed and hydrogeological and hydrochemical spatial maps were generated. The data were submitted for analysis using descriptive statistics, kriging, and principal component analysis (PCA). The results showed that the artesian wells in porous sediments near the coast were of the mixed bicarbonate type and were generally suitable for human consumption. The coefficient of variation was medium too high for all hydrochemical variables. The variables showed a better fit to the Gaussian model, in the study of spatial dependence. In PCA, Cl was the one with the highest correlation with nitrate (NO3). The anthropogenic influence on water quality at the center of RMRE, mainly on NO3 concentrations, had a direct impact on water quality for human health.
A halochromic film containing Plinia cauliflora peel anthocyanins loaded into a cashew gum polysaccharide‑polyvinyl alcohol matrix
(2022) Miranda, Bruna Melo; Cruz, Maurício Vicente; Campos, Ivan Tiago Nunes de; Fernandes, Kátia Flávia; Silva, Flávio André
This study reports the extraction of anthocyanins from P. cauliflora peels, its partial characterization and the inclusion into a halochromic film based on cashew gum polysaccharide and polyvinyl alcohol (CGP/PVA). Three kinds of extractions were performed: The classic acidic-alcoholic solvent method; enzymatic method with the cell wall degrading enzymes (cellulase and pectinase) and the combination of these two extraction methods. Time and temperature for extraction varied from 3, 6, 9, 12, and 24 h and 4, 20, 30, and 40 °C, respectively. After extraction, the anthocyanins were fractionated by chromatography and partially characterized by Fourrier transform infrared spectroscopy (FTIR) and regarding their antioxidant activity. Maximum values found in the extraction procedures were 368 ± 1.94 mg 100 g−1 (30 °C/9 h); 216.76 ± 2.98 mg 100 g−1 (40 °C/3 h) and 707.09 ± 3.97 mg 100 g−1, respectively for acidic-alcoholic solvent, for cellulase and for a combination of solvent and enzyme extraction. The antioxidant activity of the anthocyanins was preserved, showing higher values than the commercial antioxidant BHT. The chromatographic fractionation resulted in 2 peaks, which presented characteristic bands of cyanidin 3-glucoside and delphinidin in FTIR. The inclusion of anthocyanins in CGP/PVA films resulted in a pH-sensitive material changing the color from clear red in acid pH environment to brownish-green color in basic medium. The results of this study were promising and indicate that CGP/PVA-anthocyanin films are good candidates for smart packaging development.
A novel GIS-based tool to reveal spatial trends in reaction norm: upland rice case study
(2020) Costa Neto, Germano Martins Ferreira; Morais Júnior, Odilon Peixoto de; Heinemann, Alexandre Bryan; Castro, Adriano Pereira de; Duarte, João Batista
The upland rice crop system located within Brazilian savannas and Amazon Rainforest is the largest rainfed rice growing area in Latin America. To develop and release higher yield and adapted cultivars for this large region, the upland rice breeders need to conduct multiple-location trials aiming to model the genotype × location (G × L) and evaluate the germplasm yield adaptability. Here we hypothesize that regional patterns of G × L across this extensive region can be modeled by integrating factorial regression models with a geographic information system (GIS). Two sets of advanced yield trials from different germplasm pool were used in this study. From GIS tools, we collect and process geographic covariates and produce thematic maps of yield adaptability. One advantage of the methodology is that adaptability can be dissected into genotypic-sensibility coefficients related to the reaction norm for the geographic gradient. Then, breeders can discriminate different types of adaptability over a region, such as responsiveness for elevation, longitudinal or latitudinal adaptation, identifying possible ideotypes to solve current adaptation gaps for target regions. We observed that about of 53–59% of the G × L effects are due to predictable geographic-related factors. However, the upland rice germplasm is better adapted to higher elevations (> 700 m), which may indicate limitations in cultivar development because these regions do not represent the current upland rice growing region. We suggest to exploit geographic-related factors by increasing breeding efforts for northern and western Brazil environments located at lower elevations (< 300 m) and Equador’s near latitudes (2° S–2° N).
A polinização por abelhas sob a perspectiva da Abordagem de Serviços Ecossistêmicos (ASE)
(2021-04) Vieira, Fernanda Rodrigues; Andrade, Daniel Caixeta; Ribeiro, Francis Lee
This study aimed to analyze the benefits of bee pollination from the perspective of the Ecosystems Services Approach (ESA). The article included a traditional theoretical review related to ASE and Ecological Economics and a systematic review of publications indexed to the Web of Science platform, that had done some kind of evaluation of pollination by bees, wild or managed. This review took place through four phases: search for articles, screening, extraction of information and synthesis of results. During the first phase, 182 publications were identified until September 2020. After subsequent stages and full reading of the works, there were selected 45 that responded to the problematic proposed in this research. The results indicated an expressive increase of studies published in the last two decades, overall, on the last ten years (86,6%). Of the identified benefits, 84,4% of the studies associated the pollination to the rural agricultural productivity, meanwhile 8,88% of the studies evaluated the significance of this ecosystems service to the wild plant’s reproduction and 6,66% to the urban agriculture. Seeds by fruit is the most direct measurement of this ecosystem service, being directly connected to the metrics of fruit size and quality. From the 45 analyzed studies, only 07 performed the economic valuation and the methods used were: Dependency Ratio (DR), Replacement Costs (CR), Yield Analysis (YA) and Willingness to Pay (WTP). It was found, in general, that bee pollination is widely recognized for its importance for agricultural crops and for the formation of prices in agriculture. Nevertheless, the ESA proposes an integrative analysis of economic, environmental and social perspectives that guides the identification of values beyond the market for ecosystem services. In the case of pollination, its contribution to the reproduction of native vegetation, maintenance of landscapes and, consequently, to the preservation of biodiversity must also be recognized.
A proposed methodology for the correction of the leaf area index measured with a ceptometer for pinus and eucalyptus forests
(2016) Mendes, Domingos; Nigel, Lopes; Helder, Walford; Sette Junior, Viana Carlos Roberto
Leaf area index (LAI) is an important parameter controlling many biological and physiological processes associated with vegetation on the Earth's surface, such as photosynthesis, respiration, transpiration, carbon and nutrient cycle and rainfall interception. LAI can be measured indirectly by sunfleck ceptometers in an easy and non-destructive way but this practical methodology tends to underestimated when measured by these instruments. Trying to correct this underestimation, some previous studies heave proposed the multiplication of the observed LAI value by a constant correction factor. The assumption of this work is LAI obtained from the allometric equations are not so problematic and can be used as a reference LAI to develop a new methodology to correct the ceptometer one. This new methodology indicates that the bias (the difference between the ceptometer and the reference LAI) is estimated as a function of the basal area per unit ground area and that bias is summed to the measured value. This study has proved that while the measured Pinus LAI needs a correction, there is no need for that correction for the Eucalyptus LAI. However, even for this last specie the proposed methodology gives closer estimations to the real LAI values.
A regulação normativa da energia solar no Brasil e sua aplicabilidade em Goiás
(Universidade Federal de Goiás, 2024-11-07) Silva, Fernanda Chaveiro da; Souza, Cleonice Borges de
The article aims at the evolutionary analysis of the norms pertaining to the Brazilian photovoltaic electric energy sector, highlighting the survey of the energy balance in Brazil, in Goiás and in the municipality of Morrinhos. Through the methodology used, it was possible to demonstrate the value of the investment with the implementation of the photovoltaic system; the return of the installation (payback) and the amount of CO2 produced by the electrical matrix before and after the insertion of solar energy. It was found that the legislation presents, at first, the search for efficiency in electric production and consumption without waste, in response to the energy supply crisis faced by Brazil, with little emphasis on alternative sources of generation. At a later moment, it presents the search for sustainability in the scope of the electricity sector, due to environmental issues, under debate, greenhouse effect, water crisis and socio-environmental impacts. The environmental benefits from the use of the photovoltaic arrangement in Brazilian energy production show positive results.
A starting guide to root ecology: strengthening ecological concepts and standardising root classification, sampling, processing and trait measurements
(2021) Freschet, Grégoire T.; Pagès, Loïc; Iversen, Colleen M.; Comas, Louise H.; Boris Rewald; Roumet, Catherine; Klimešov, Jitka; Zadworny, Marcin; Poorter, Hendrik; Postma, Johannes A.; Moraes, Moemy Gomes de
In the context of a recent massive increase in research on plant root functions and their impact on the environment, root ecologists currently face many important challenges to keep on generating cutting-edge, meaningful and integrated knowledge. Consideration of the below-ground components in plant and ecosystem studies has been consistently called for in recent decades, but methodology is disparate and sometimes inappropriate. This handbook, based on the collective effort of a large team of experts, will improve trait comparisons across studies and integration of information across databases by providing standardised methods and controlled vocabularies. It is meant to be used not only as starting point by students and scientists who desire working on below-ground ecosystems, but also by experts for consolidating and broadening their views on multiple aspects of root ecology. Beyond the classical compilation of measurement protocols, we have synthesised recommendations from the literature to provide key background knowledge useful for: (1) defining below-ground plant entities and giving keys for their meaningful dissection, classification and naming beyond the classical fine-root vs coarse-root approach; (2) considering the specificity of root research to produce sound laboratory and field data; (3) describing typical, but overlooked steps for studying roots (e.g. root handling, cleaning and storage); and (4) gathering metadata necessary for the interpretation of results and their reuse. Most importantly, all root traits have been introduced with some degree of ecological context that will be a foundation for understanding their ecological meaning, their typical use and uncertainties, and some methodological and conceptual perspectives for future research. Considering all of this,we urge readers not to solely extract protocol recommendations for trait measurements from this work, but to take a moment to read and reflect on the extensive information contained in this broader guide to root ecology, including sections I–VII and the many introductions to each section and root trait description. Finally, it is critical to understand that a major aim of this guide is to help break down barriers between the many subdisciplines of root ecology and ecophysiology, broaden researchers’ views on the multiple aspects of root study and create favourable conditions for the inception of comprehensive experiments on the role of roots in plant and ecosystem functioning.
A survey of insecticides resistance in populations of Tibraca limbativentris Stal. (Hempitera: Pentatomidae) an insect pest of flooded rice in Brazil
(2021) Maciel, Diogo Nery; Fragoso, Daniel de Brito; Barrigossi, José Alexandre de Freitas; Lacerda, Mábio Chrisley
The resistance of rice stalk stink bug, Tibraca limbativentris Stal 1860 (Hemiptera: Pentatomidae) to five insecticides was investigated in the present study. The tested insecticides were bifenthrin, carbosulfan, etophenprox, λ-cyhalothrin, and thiametoxam. The five field-collected populations of rice stalk stink bugs from Luis Alves-GO, Flores de Goiás-GO, Formoso do Araguaia-TO, Lagoa da Confusão-TO and Itajaí-SC were investigated in relation the insecticide resistance occurrence. A further Santo Antônio de Goiás population, from natural environment was used as standard-population of susceptibility. Insects of these populations were submitted to discriminating concentrations (LC95s) with objective to determine the frequences of individuals resistants. The insects population from Formoso do Araguaia were the most resistant to all tested insecticides. The mortality values observed in this population were 76%, 86%, 72%, 80%, and 80% for carbosulfan, bifenthrin, etofenprox, λ-cyhalothrin, and thiamethoxam, respectively. The frequencies of resistant individuals ranged from 9% a 23% and were classified as moderate. The more expressive values of the resistance rate (RR) were found to the insecticide thiamethoxan 17-fold in the population of Formoso do Araguaia and 12-fold to the Luís Alves population. This first findings about insecticide resistance in T. limbativentris shows the seriousness of the problem in the region and suggests the possible occurrence of cross-selection in this species, confering insecticide resistance to one or more products of different groups. These results are usefuls as information to integrated pest management (IPM) in the regions producers of flooded rice in Brazil, as technical guidance to rice farmers and open news perspectives of investigation in this research area.
Abatimento de camalhão de terraços em função do rearranjo estrutural do solo
(2018-06) Ferreira, Carlos Cristiano; Gonçalves, Sara Lane Sousa; Griebeler, Nori Paulo; Mariano, Natália Pereira; Ogera, Adriana Aparecida Ribon
Terraces have the purpose of retaining and infiltrating, or slowly draining the waters from the upper launcher portion, in order to minimize the erosive power of the floods. The objective of this work was evaluate the reduction expected in ridges and terraces due to the structural rearrangement of different soil classes. Samples were collected from three classes of soils in an approximate volume of 20 liters, in the city of Campestre de Goiás e Palmeiras de Goiás, GO. Each soil class represented a treatment, being T1 - Red Latosol; T2 - Yellow Latosol and T3 - Displastic Haplic Cambisol.The soil of each class was conditioning, without compaction or agitation, in seven containers made of Polyvinyl Chloride (PVC) with dimensions of 250 mm in diameter and 250 mm in height. After the fill of all the containers, a daily addition of water blade was performed to them. The variables analyzed in the treatments were the height and soil density in the containers. These evaluations were repeated every week until the end of the rain simulation. The reduction of terrace in each class of soil was quantified by the difference of initial and final height of the soil in the containers and the density by mean of relation between mass and soil volume. The results showed for the conditions under study that there was a significant difference for soil abatement, in which the cambisol presented a higher mean value of 5.8% abatement and observed that the humidity increased linearly during the twenty days analyzed.
Abonos verdes y su influencia en el frijol (Phaseolus vulgaris L.) en sistema agroecológico
(2016-06) Rivero Herrada, Marisol; Gaibor Fernández, Ramiro Remigio; Reyes-Pérez, Juan José; Leandro, Wilson Mozena; Ferreira, Enderson Petrônio de Brito
Los abonos verdes han sido usados como productores de biomasa y suministradores de nutrientes y mantienen el potencial productivo del suelo en regiones tropicales. El objetivo del presente estudio fue evaluar la producción de biomasa seca y la concentración y acumulación de nutrientes en plantas de abonos verdes, en dos sistemas de cultivo, sin asociar y asociadas con mijo y su influencia en el estado nutricional del frijol (Phaseolus vulgaris L.) en sucesión en producción agroecológica. Fueron evaluadas cuatro leguminosas (Canavalia ensiformis Adans; Cajanus cajan (L.) Millsp.; Crotalaria juncea L.; Mucuna pruriens (L.) DC ) y una gramínea (Pennisetum glaucum L.), utilizada para la asociación. En el experimento se utilizó un diseño de bloques al azar, con ocho tratamientos y cuatro repeticiones. Las plantas de abonos verdes fueron cortadas y dejadas en el suelo a los 60 días después de sembradas y el frijol fue sembrado a los 20 días después del corte de las plantas. Las variables evaluadas fueron, la producción y el contenido de nutrientes en la biomasa seca (BS) de los abonos verdes y el contenido de nutrientes en las hojas del frijol en sucesión. La producción de biomasa seca de los abonos verdes fue superior a 9,00 t ha-1. Se destacaron mucuna con los mayores tenores de N, Ca, Mg y canavalia con los mayores tenores de K, Cu, Mn. La mayor acumulación de los nutrientes P, K y Ca se produjo en Cajanus. En mucuna se obtuvieron los mayores valores de N y Mg. La mayor relación C/N la alcanzó crotalaria.
Absorção de água e tolerância à dessecação em sementes de Bromelia reversacantha Mez
(2018) Zucchi, Marcelo Ribeiro; Santos, Fernanda Rodrigues dos; Rocha, Ednaldo Cândido; Teixeira, Itamar Rosa; Pires, Larissa Leandro
Bromelia reversacantha is an endemic species of some areas of Cerrado rupestre, Brazil, threatened with extinction and that presents ornamental characteristics quite interesting. This species is still poorly studied and the physiological behavior of its seeds during and after drying and storage is practically unknown. Thus, in this study we aimed to analyze the imbibition pattern of seeds stored over a year (first experiment) and the effects of dehydration on seed germination capacity (second experiment) of B. reversacantha. Ripe fruits were collected and after the seeds were extracted, washed and then dried in the shade. In the first experiment, the treatments were distributed in a completely randomized design in a triple factorial scheme (2 x 7 x 11), with two storage conditions (laboratory and cold room); seven storage periods (time zero, two, four, six, eight, ten and twelve months); and eleven periods of imbibition (time zero, 1, 2, 4, 8, 16, 24, 36, 48, 60 and 72 hours from the beginning of imbibition); in eight replicates of 25 seeds per treatment. In the second experiment seeds were used two months after harvest in a completely randomized design, with four treatments (water contents), 12.8%, 11.1%, 8.7% and 6.8%, in four replications of 50 seeds. It is concluded that the seeds of B. reversacantha absorb water in an average period of time of 29.8 hours for the change from phase I to phase II of the imbibition to occur, evidencing no integumentary dormancy. In addition, it was verified that the seeds of B. reversacantha have orthodox behavior, being able to be dewatered at 40 ° C up to 6.8% moisture without prejudice to their germination capacity.
Absorção de fósforo em doze genótipos de milho inoculados com fungo micorrízico arbuscular em solo de cerrado
(2008-12) Reis, Edésio Fialho dos; Carneiro, Marco Aurélio Carbone; Saggin Júnior, Orivaldo José; Rotta, Douglas André; Sousa, Mohamad Yussef
The aim of this research was to evaluate the efficiency of phosphorus absorvation in twelve corn genotypes. The study was performed in presence and absence of arbuscular mycorrhizal fungus inoculation. The experiment took place at the Agrarian and Biological Center greenhouse, in the Federal University of Goiás, Jataí, Brazil. The genotypes were randomly distributed in blocks with three replicates in a 12x2x2 factorial. The genotypes were AG9010, P30K75, AG8060, P30P70, AG405, P30F33, AG7000, BANDEIRANTES, EMGOPA501, BALU178, DINA657, 2C599, cultivated under two doses of phosphorus (10 and 100mg kg-1 of P in soil solution) in presence or absence of Glomus etunicatum mycorrization. The study verified the difference among genotypes in dry root matter production. The ratio among root dry and shoot dry matter colonized with mycorrizal fungus was observed. Ratio accumulated phosphorus among shoot and dry root matter was also seen. The mycorrization changed classification of genotypes regarding to dry matter shoot production under low P and the response for higher P supply.
Absorção de óleo de soja e sódio em arroz e feijão preparados
(João Batista Duarte, 2004-04) Silva, Mara Reis; Miranda, Martha Zavariz de; Silva, Priscilla Ramos Mortate da; Xavier, Sillsa da Costa
The absorption of soybean oil and sodium was assessed in cooked rice and common bean, analyzing moisture, total lipids, sodium, and acceptability of the samples. Rice (long and thin grain) and beans (Carioca type) were prepared with 2%, 4% or 6% salt and soybean oil in the proportion of 2%, 7% and 12%for rice and 4%, 12% and 20% for beans. An acceptability test was carried out with fifty two consumers and a nine-point hedonic scale, which was used to evaluate taste characteristics and appea-rance of cooked rice and beans. The experiment was carried out according to a 3x3 factorial design and the results were analysed using the response surface statistical method. The acceptability of the samples was influenced only by the amount of sodium in the dishes. The most acceptable rice was cooked with 7% oil and 4% salt, and the preferred beans were cooked with 12% oil and 4% salt. In these treatments, the absorbed oil content was 1.6 g/ 100g and 1.5 g/100g, and the absorbed sodium rates were 0.6 g/ 100g and 0.5 g/100g for rice and beans, respectively.
Abundance, distribution and effects of temperature and humidity on arthropod fauna in different rice ecosystems in Uganda
(2017) Masika, Fred Bwayo; Masanza, Michael; Abreu, Aluana Gonçalves de; Barrigossi, José Alexandre Freitas; Kizito, Elizabeth Balyejusa
Abundância relativa das espécies de cerambycidae (Insecta-coleoptera) em pomar de frutíferas misto
(Antônio Henrique Garcia, 2000-12) Canettieri, Elisabeth Rose Pereira da Silva; Garcia, Antonio Henrique
It was studied the relative abundance to the species of the family Cerambycidae (Insecta-Coleoptera) in a mixed orchard composed by 28 diferent species in the period from decembre 1997 to may 1999 in Ceres, state of Goiás, Brazil. It was used light traps “Luiz de Queiroz” model with BL 15 wats lamps. These traps were turned on for 12 hours during 2 days in a total of 24 hours of week collets. It was collected a total of 1474 Cerambycidae, agruped in 39 genera and 49 species. From the 49 species collected Acanthoderes jaspidea, Achryson surinamum, Chlorida festiva, Eurodacrys sexgutatta, Gnomibidion fulvipes, Lophopoeum timbouve, Megacyllene acuta, Rhopalophora collaris e Trichophorus distinctus were classified as very abundant. From the collected species 48,98 % were classified as raras, 12,24% as disperse, 20,41% as commons and 18,37 % as very abundant. Among the 39 genera Oreodera was represented by 3 species and the genera Acanthoderes, Aerenica, Chrysoprasis, Colobothea, Eutrypanus, Megacylene, Myoxomorpha and Nyssodrysternum by 2 species (4,08 %) , while the other genera wera represented by one species only.
Ação de diferentes corretivos e do gesso sobre as características químicas de um latossolo vermelho escuro na sucessão arroz e soja
(Antônio Henrique Garcia, 1996-06) Leandro, Wilson Mozena; Bellingieri, Paulo Affonso; Galon, João Alexandre
Aiming to verify lhe action of different soil correctives on lhe chemical characteristics of a dark red latosoil median texture a two years field experiment was carried. A completely randomized design wilh 7 treatments (6 different soil correctives and a control wilh no liming) and four repetitions were used. As soil correctives limestone (calcitic, dolomitic calcinated do!omitic, and magnesian), gypswn and calciwn hydroxide were emp!oyed. 0n lhe first year lhe experimental area was cropped wilh rice ( Oriza saliva L.) cv. !AC - 25 and on lhe second one wilh soybean (G/ycine max L. Merril) cv. IAC - 8. Dolomitic limestone caused lhe greatest chemical alterations on soil charateristics, wilh incre ase on pH, K+, Ca'+ and Mg'+ and decrease on W + AI'+ values, during lhe first year. Losses of exchangab!e Mg# by leaching have been found during lhe second year, due to lhe use of gypswn and calcitic limestone. All liming materiais, but gypswn, increased rice yields when compareci wilh lhe contrai. Toe calcined dolomitic limestone gave lhe highest soybean yie!ds.
Ação de hidrocoloides na estabilidade física de suco tropical de cagaita pronto para consumo
(2018) Siqueira, Ana Paula Silva; Campos, Marizete Aparecida da Cunha; Barbosa, Thaís Alves; Souza, Eli Regina Barboza de; Vera, Rosangela
Cagaita is a native fruit of the cerrado and highly perishable, so one way to maintain its consumption is to process it. Fruit processing for pulp, juice and nectar processing has grown in recent years, consumption has increased due to the practicality and also the variability of flavors found in the market. One of the major problems in the production of juices is to ensure the stability of the dispersion for this, commercially the hydrocolloids have been used. The objective of this study was to elaborate a tropical juice of cagaita with 35% of pulp already sweetened and ready for consumption, pasteurized at 85 ° C and added with hydrocolloids. The study was carried out in a factorial scheme (3 x 1 x 4), with three hydrocolloids (guar gum, gellan gum and pectin), a treatment temperature (85 ºC) and four pasteurisation times (0, 2, 5 and 10 minutes) . The physicochemical evaluations of the juice were pH, soluble solids, acidity and ratio, a qualitative enzymatic evaluation was carried out and the physical stability test was performed at 0, 24 and 48 hours after pasteurisation. It was noted that the acidity and sweetness balance is high for the hydrocolloid formulations (ratio 17) and that the acidity is characteristic of the fruit. Decantation from 24 to 48 hours is not altered and the best treatments involve use of gellan gum with pasteurization for 2 to 5 minutes.

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