Instituto Federal Goiano Campus Rio Verde

Rio Verde de Mato Grosso, Brazil

Instituto Federal Goiano Campus Rio Verde

Rio Verde de Mato Grosso, Brazil
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Neri A.V.,Federal University of Viçosa | Soares M.P.,Instituto Federal Goiano Campus Rio Verde | Neto J.A.A.M.,Federal University of Viçosa | Dias L.E.,Federal University of Viçosa
Revista Arvore | Year: 2011

The objective of this work was to study species that can be tested in the recovery of Arsenio high concentration areas. Therefore, 10 cerrado areas degraded by gold exploration in Paracatu-MG, Brazil were studied. It was used the Braun-Blanquet cover value and abundance scale. The species were classified by the Raunkiaer life form. The areas were floristically compared by Sørensen index. Out of 197 woody and herbs morpho-species found, 102 were identified at specific level, 35 at genus level and 40 at family level. Twenty morpho-species could not be identified. There was a great floristic richness among sample units (21-53 species), which influenced the formation of three groups in floristic similarity analysis. The more abundant and probably more adapted species to the environmental conditions were Axonopus marginatus, Simarouba amara, Aristida ekmaniana, Digitaria ciliaris, Stylosanthes viscosa, Andropogon bicornis, Maprounea guianensis and Sabicia brasiliensis. The most frequent form of life was phanerophyte followed by hemicryptophyte and chamephyte. In the biological spectra, it was possible to visualize the different structure of the studied areas, emphasizing the environmental diversity present despite presenting low floristic richness.


Lemes A.C.,Grande Rio University | Alvares G.T.,Grande Rio University | Egea M.B.,Instituto Federal Goiano Campus Rio Verde | Brandelli A.,Federal University of Rio Grande do Sul | Kalil S.J.,Grande Rio University
Bioresource Technology | Year: 2016

The use of processes for simultaneous production of bioproducts as enzymes and bioactive compounds is an interesting alternative to reduce environmental impacts. Thus, the aim of this study was to produce simultaneously, using the biorefinery concept, both proteases and bioactive compounds with antioxidant activity from Bacillus sp. P45 cultivation by using different by-products. The integrated process developed in this study enabled to obtain enzymes with proteolytic and keratinolytic properties in a process with alternate substrates from agro-industrial by-products (feather meal, residual feather meal and biomass), thus, creating an interesting alternative to managing them. The residual biomass provided the highest protease activity (1306.6 U/mL) and the reused feather meal reached the highest keratinolytic activity (89 U/mL), both at 32 h of cultivation. Moreover, hydrolysates produced in cultivation using feather meal and residual biomass had high antioxidant activity, they have great potential as natural antioxidants. © 2016 Elsevier Ltd


PubMed | Instituto Federal Goiano Campus Rio Verde, Grande Rio University and Federal University of Rio Grande do Sul
Type: | Journal: Bioresource technology | Year: 2016

The use of processes for simultaneous production of bioproducts as enzymes and bioactive compounds is an interesting alternative to reduce environmental impacts. Thus, the aim of this study was to produce simultaneously, using the biorefinery concept, both proteases and bioactive compounds with antioxidant activity from Bacillus sp. P45 cultivation by using different by-products. The integrated process developed in this study enabled to obtain enzymes with proteolytic and keratinolytic properties in a process with alternate substrates from agro-industrial by-products (feather meal, residual feather meal and biomass), thus, creating an interesting alternative to managing them. The residual biomass provided the highest protease activity (1306.6U/mL) and the reused feather meal reached the highest keratinolytic activity (89U/mL), both at 32h of cultivation. Moreover, hydrolysates produced in cultivation using feather meal and residual biomass had high antioxidant activity, they have great potential as natural antioxidants.


Schwerz T.,Instituto Federal Goiano Campus Urutai | Jakelaitis A.,Instituto Federal Goiano Campus Rio Verde | Teixeira M.B.,Instituto Federal Goiano Campus Rio Verde | Soares F.A.L.,Instituto Federal Goiano Campus Rio Verde | Tavares C.J.,Instituto Federal Goiano Campus Posse
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2015

The objective of this research was to evaluate the production of sunflower in the off-season, supplemented or not with irrigation and cultivated after the crops of soybeans, corn or palisade grass. The treatments were allocated in a randomized blocks design in split plot (2×3), the supplemental irrigation by center pivot and without irrigation in the plots, and in the subplots the crops predecessors: soybeans, corn and palisade grass, with four replications. The height, stem diameter, shoot dry weight, number of leaves per plant and leaf area were evaluated at 15, 30, 45, 60, 75 and 90 days after emergence of sunflower plants. Sunflower plants were tall under all cultivation conditions, without variability in the evolution of stem diameter and of number of leaves. Leaf area was less in sunflower plants grown under corn straw and palisade grass under non-irrigated conditions. No significant effects on yield components - mass of thousand seeds, head diameter and oil and grain yield were observed. After cultivation of soybean, sunflower plants produced greater dry mass of shoots and higher oil content in the seed compared to plants established under corn stalk. © 2015, Departamento de Engenharia Agricola - UFCG/Cnpq. All rights reserved.


Alberto P.S.,Brazilian National Council for Scientific and Technological Development | Silva F.G.,Instituto Federal Goiano Campus Rio Verde | Cabral J.S.R.,Brazilian National Council for Scientific and Technological Development | De Fatima Sales J.,Instituto Federal Goiano Campus Rio Verde | Pereira F.D.,Pos Doutoranda PNPD
Semina:Ciencias Agrarias | Year: 2011

The great agricultural development in the Brazilian savannah brought with it the reduction of its natural vegetation, which has been quickly lost, especially due to extractive exploitation by man. Murici (Byrsonima verbascifolia Rich) is a fruit bearing plant of great medicinal importance in the savannah; however, its propagation is hindered by the fact that the seeds have low germination and seedling emergence in the field is slow. This study evaluated the effect of different dormancy breakage methods in murici seeds. Therefore, were evaluated effect of different temperatures; soaking in gibberellic acid and water; chemical and mechanical scarification and two types of substrate (distilled water and KNO3). Treatments were arranged in a randomized block design. Records made daily on the number of germinated seeds were used to determine the germination percentage and germination speed index. Among the methods evaluated, giberellic acid at 2,309.46 μM gave the greatest seed germination percentage, especially when the germination paper was moistened with KNO3.


Costa L.M.,Instituto Federal Goiano Campus Rio Verde | Resende O.,Instituto Federal Goiano Campus Rio Verde | de Oliveira D.E.C.,Instituto Federal Goiano Campus Rio Verde
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

This study aimed to adjust different mathematical models to experimental data of hygroscopicity of crambe fruits, selecting one that best represented the phenomenon, and obtain the values of the isosteric heat of desorption as a function of equilibrium moisture content. To obtain an equilibrium moisture content, crambe fruit was used with an initial moisture content of 26.0% (dry basis) and static gravimetric method. For each replicate 10 g of fruit were placed surrounded by a permeable fabric to permit air contact with the product and placed within the desiccators. To control the relative humidity inside the desiccators, saturated solutions were used. The desiccators were placed in incubator B.O.D., adjusted to temperatures of 25, 30, 35 and 40 °C. The equilibrium moisture content of crambe fruits is directly proportional to water activity and decreases with increasing temperature for the same value of equilibrium relative humidity. Based on statistical parameters, the models of Copace and Modified Oswin are those that best represent the hygroscopicity of crambe fruits compared to other tested models. The isosteric heat increases with decrease in equilibrium moisture content and requires a larger amount of energy to remove water from the crambe fruit.


Tavares C.J.,Instituto Federal Goiano Campus Posse | Araujo A.C.F.,Instituto Federal Goiano Campus Rio Verde | Jakelaitis A.,Instituto Federal Goiano Campus Rio Verde | Resende O.,Instituto Federal Goiano Campus Rio Verde | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2015

The objective of this study was to evaluate the effect of using the herbicide saflufenacil desiccant pre-harvest and storage on the physiological and sanitary quality of azuki bean seeds. Six doses of saflufenacil herbicide (0, 50, 75, 100, 150 and 200 g a.i. ha-1) were tested and two evaluation periods of seed quality: harvest and six months after harvest. The desiccant application occurred at physiological maturity of azuki bean and seeds were stored in paper bags (kraft) under natural conditions - 25.4 ± 3 °C temperature and 67.3 ± 3% relative humidity. The saflufenacil may be used up to a dose of 65 g a.i. ha-1, without harming the physiological seed quality. The storage caused a drop in the percentage of germination, increase in the number of abnormal seedlings and reduction in size and dry mass of seedlings. Desiccation pre-harvest and storage reduces the infestation of Cladosporium, Fusarium and Rizhopus on the azuki bean seed. © 2015, Departamento de Engenharia Agricola - UFCG/Cnpq. All rights reserved.


de Freitas R.M.S.,University of Rio Verde | de Lima L.E.,Instituto Federal Goiano campus Rio Verde | Silva R.S.,University of Rio Verde | Campos H.D.,University of Rio Verde | Perin A.,Instituto Federal Goiano campus Rio Verde
Revista Caatinga | Year: 2016

The etiologic agent of the Asian soybean rust is the Phakopsora pachyrhizi, which causes a reduction in the photosynthetic leaf area and, consequently, in the crop yield. Chemical control is one of the main measures for its management. The objective of this work was to evaluate the efficacy and selectivity of the fluxapyroxad fungicide on controlling the Asian soybean rust, under the edaphoclimatic conditions of the Cerrado biome. The experiment was conducted in an area under no-tillage system, in the Agricultural Research Center, Rio Verde, Goias, Brazil, during the 2012/2013 crop season, using the cultivar NA7337. A randomized block experimental design was used, with twelve treatments and four replications. The treatments consisted of applications of fluxapyroxad (FX), pyraclostrobin (PT), epoxiconazole (EX) and metconazole (MZ). The average severity of the disease in the plants reached 37% in the Control. All treatments with fungicides differed from the Control. Treatments 9, 10, 11 and 12 provided the greatest rates of soybean rust control. The treatments 10, 11 and 12 had the highest thousand grain weights, and the yields of the treatments 2, 3 and 11, despite higher than the Control, were lower than the treatments 4, 5, 6, 7, 8, 9, 10 and 12, which had statistically equal yields. The increasing in yield, compared to the Control, ranged from 10.05% (pyraclostrobin, epoxiconazole + pyraclostrobin + mineral oil) to 30.55% (pyraclostrobin, pyraclostrobin + fluxapyroxad + mineral oil and pyraclostrobin + metconazole + mineral oil). The highest rates of soybean rust control were presented by fungicides containing fluxapyroxad. © 2016, Universidade Federal Rural do Semi-Arid. All Rights Reserved.


Batista P.F.,Instituto Federal Goiano Campus Rio Verde | Costa A.C.,Instituto Federal Goiano Campus Rio Verde | Megguer C.A.,Instituto Federal Goiano Campus Rio Verde | da Silva Lima J.,Instituto Federal Goiano Campus Rio Verde | de Fatima Sales J.,Instituto Federal Goiano Campus Rio Verde
South African Journal of Botany | Year: 2014

The species Cochlospermum regium is a shrub that disseminates by seed, but with extremely low germination even under ideal conditions, that is a response to physical dormancy imposed by the seed coat. Thus, we aimed to evaluate the efficacy of dimethyl sulphoxide (DMSO) in overcoming dormancy in Cerrado 'algodãozinho' seeds compared to other traditional methods, in combination with growth analysis to assess seedling normality. The seeds in experiment I were submitted to the following treatments: (1) control: soaking in distilled water for 24. h; (2) mechanical scarification: rubbing with sandpaper for 1. min and soaking in distilled water for 24. h; (3) acid scarification: immersion in sulphuric acid for 2. h followed by soaking in distilled water for 24. h; (4) immersion in DMSO at 65. °C for 24. h followed by soaking in distilled water for 24. h; and (5) soaking in distilled water for 24. h and immersion in sodium hypochlorite (NaOCl), 12% active chlorine, for 5. h. The volume of solution used in all treatments was sufficient to completely submerge the seeds. Initial seed moisture content, seed dry mass, germination percentage, and germination speed index (GSI) were measured. In experiment II, seeds were immersed in DMSO at 65. °C for 24. h followed by soaking in distilled water for 24. h or distilled water at 65. °C for 24. h and evaluated by the standard germination test and GSI. Shortly after germination, seeds from both treatments were transferred to trays containing sand as a substrate for subsequent seedling morphological and growth evaluation. Overall, the results show that mechanical scarification with sandpaper for 1. min and seed immersion in DMSO were the best treatments for overcoming dormancy in seeds of C. regium, and DMSO caused no morphological abnormality in the seedlings. © 2014 South African Association of Botanists.


PubMed | Instituto Federal Goiano Campus Rio Verde and São Paulo State University
Type: Journal Article | Journal: Journal of dairy science | Year: 2015

The diacylglycerol-O-transferase 1 gene is a positional and functional candidate for milk composition traits. The objective of this study was to evaluate the segregation of the variable number of tandem repeat polymorphisms in the regulatory region of diacylglycerol-O-transferase 1 gene in a water buffalo herd, and to assess the association of this mutation with milk production traits. For this purpose, 196 Murrah buffalo cows were genotyped by PCR. The association of the marker with total milk, fat, and protein yields at 305 d of lactation, milk fat and protein percentage, and somatic cell scores were evaluated by single-trait analyses using a generalized mixed model. Two segregating alleles were identified in the population. The allele with 2 repeats affected fat percentage favorably. The present results suggest that this polymorphism is an interesting marker to include in the genetic evaluation of buffaloes.

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