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| Registros recuperados: 87 | |
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| Goneli,André L. D.; Corrêa,Paulo C.; Figueiredo Neto,Acácio; Kirsch,Michele R. H.; Botelho,Fernando M.. |
| ABSTRACT Knowledge regarding the static pressure drop in granular layers is of fundamental importance in the development of efficient drying and aeration projects of agricultural products. Thus, the objective of this study was to evaluate the effects of impurity contents on the static pressure drop in different bed depth of castor bean grains, as well as modify the mathematical models per the obtained experimental data and select the model that best represents this phenomenon. First, impurities in castor bean grains of the Guarani variety were eliminated and 6% of the moisture content (dry basis) was retained. The coarse impurity contents were obtained with 2%, 4%, and 6% of mass addition. The pressure drop in different bed depth of clean and impure castor... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bulk density; Load loss; Porosity; Ricinus communis L.; Moisture content. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200184 |
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| Hauth,Michele R.; Botelho,Fernando M.; Hoscher,Renata H.; Botelho,Sílvia de C. C.; Oliveira,Gabriel H. H. de. |
| ABSTRACT The knowledge of physical properties of grains is important for the optimization of postharvest operations. Thus, this study aimed to evaluate the effect of moisture content over physical properties of different cultivars of soybean. Soybean of cultivars NS7901RR, TMG1180RR, P98Y70 and TMG132RR were used, with initial moisture content of 0.32, 0.27, 0.25 and 0.21 dry basis (d.b.), respectively. In order to dry the samples, an oven of forced air circulation was used. Samples were dried at temperature of 50 °C, being the drying procedure stopped when the moisture content of soybean was equal or inferior than 0.15 (d.b.). During drying, for interested moisture contents, physical properties were determined: bulk density, equivalent diameter,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.); Moisture content; Physical characteristics; Shape and size. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400590 |
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| Corrêa,Paulo C.; Resende,Osvaldo; Garin,Silvia A.; Jaren,Carmen; Oliveira,Gabriel H. H. de. |
| The present study aimed to determine the volumetric shrinkage rate of bean (Phaseolus vulgaris L.) seeds during air-drying under different conditions of air, temperature and relative humidity, and to adjust several mathematical models to the empiric values observed, and select the one that best represents the phenomenon. Six mathematical models were adjusted to the experimental values to represent the phenomenon. It was determined the degree of adjustment of each model from the value of the coefficient of determination, the behavior of the distribution of the residuals, and the magnitude of the average relative and estimated errors. The rate of volumetric shrinkage that occurred in bean seeds during drying is between 25 and 37%. It basically depends on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L.; Moisture content; Volume; Air-drying; Physical property. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000400010 |
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| Gonçalves,Douglas N.; Resende,Osvaldo; Costa,Lílian M.; Prado,Mariana C.. |
| The Knowledge of the physical properties of agricultural products has great importance for the construction and operation of equipment for drying and storage, to achieve increased efficiency in post-harvest operations. The aim was to determine and analyze the physical properties of crambe fruits during drying at different temperatures. Crambe fruits with an initial moisture content of 0.36 (decimal d.b.) which was reduced by drying at 37.0; 58.8 and 83.5 ºC and relative humidity of 29.4; 11.2 and 3.2%, respectively, to 0.09 ± 1 (decimal d.b.). At different levels of moisture contents (0.36; 0.31; 0.26; 0.21; 0.17; 0.13 and 0.09 decimal d.b.), was evaluated the intergranular porosity, the bulk density, the true density as well as the volumetric shrinkage... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crambe abyssinica; Moisture content; Dries temperatures. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500016 |
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| Donato, Danilo Barros; Castro, Renato Vinícius Oliveira; Carneiro, Angélica de Cássia Oliveira; Carvalho, Ana Márcia Macedo Ladeira; Pereira, Bárbara Luísa Corradi; Oliveira, Aylson Costa; Barbosa, Conrad Julião. |
| The aim of this study was to compare three alternative methods to determine the moisture content of wood logs with the method recommended by ABNT. The moisture content of the wood was determined in a sawdust sample and with a electric meter capacitive. it was also determined the moisture content of a disk sample using the method recommended by ABNT. Using the regression model, all the methods were statistically similar. It was concluded that the use of alternative methods for determining the moisture content of wood in logs is feasible, to substitute the traditional method, but corrections must be implemented. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative methods; Moisture content; Eucalyptus; Regression Engenharia Florestal; Tecnologia e utilização de produtos florestais Métodos alternativos; Teor de umidade; Eucalipto; Regressão. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/608 |
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| RONDON,JOSIMARA N.; SASSAKI,REGINA M.; ZAIDAN,LILIAN B.P.; FELIPPE,G.M.. |
| Bidens gardneri is a herbaceous species of the cerrados, whose seeds are light sensitive at 25 °C, but they become indifferent to light when stored in soil. In this work the effects of moisture content, temperature and light (during storage) upon light sensitivity during germination were studied. Ripe achenes were collected in the cerrados of Itirapina and Moji Guaçu, State of São Paulo, Brazil. The storage conditions of the achenes varied in each experiment. Achenes were stored in darkness or light, in closed bottles, at 4 °C, 20/30 °C or 25 °C. Achenes were imbibed for 24 h at 4 °C, 25 °C or 20/30 °C (in darkness) and then stored for 1, 10, 20, 30 and 40 days (40 days only for 4 °C and 25 °C). Germination tests were conducted at 25 °C and 20/30 °C. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; Light sensitivity; Storage; Moisture content; Temperature. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000100004 |
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| Heck,R. J.; Tiessen,H.; Santos,M. C.; Salcedo,I. H.; Alves,R. J. T.. |
| This study compares the chemical composition of the solution and exchange complex of soil in a 3-year-old irrigated vineyard (Vitis vinifera L., Red Globe cultivar) with that of adjacent clearing in the native hyperxerophyllic 'caatinga' vegetation. The soils are classified as Plinthic Eutrophic Red-Yellow Argisol; according to Soil Taxonomy they are isohyperthermic Plinthustalfs. Detailed physiographic characterization revealed an impermeable gravel and cobble covering the crystalline rocks; the relief of this layer was more undulating than the level surface. Significant higher concentrations of extractable Na, K, Mg and Ca were observed within the vineyard. Lower soil acidity, higher Ca/Mg ratios, as well as lower sodium adsorption and Na/K ratios... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vineyard; Physiography; Moisture content; Exchangeable cations; Electrical conductivity; Soluble cations; Sodicity; Acidity. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832002000100020 |
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| Quequeto,Wellytton D.; Siqueira,Valdiney C.; Schoeninger,Vanderleia; Martins,Elton A. S.; Isquierdo,Eder P.; Silva,Fernanda P. da. |
| ABSTRACT Buckwheat is a prominent crop in present-day agriculture due to its nutraceutical properties; however, information on this crop regarding the post-harvest process is scarce, as well as the characterization of its physical properties and such information is essential for the development and improvement of machinery used in post-harvest processes. Thus, the objective of this study was to determine the volumetric shrinkage, porosity, bulk density and true density of buckwheat grains throughout the drying process, as well as to fit mathematical models to the experimental values of true and bulk volumetric shrinkages. Buckwheat grains of the cultivar IPR 91 - Baili with an initial moisture content of 0.250 (decimal, dry basis.) were used. The samples... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Post-harvest; Moisture content; Volumetric shrinkage. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100793 |
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| Oliveira,Pâmella M. de; Oliveira,Daniel E. C. de; Resende,Osvaldo; Silva,Daiana V.. |
| ABSTRACT Baru (Dipteryx alata Vogel) is a tree species that is part of the group of native species of the Cerrado and occurs mainly in Central Brazil, being valued for its various uses. Thus, the present work was carried out with the objective of studying the kinetics of drying of the mesocarp of baru fruits, performing the analysis of the thermodynamic properties, as well as evaluating the effect of drying on the color of the flour produced from the mesocarp. The mesocarp of baru fruits was placed in stainless steel trays, and dried at 40, 50, 60 and 70 ºC in a forced circulation oven until the moisture content of 0.12 dry basis (d.b.) was reached. Subsequently, the experimental data of the drying were adjusted with the mathematical models frequently... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Moisture content; Color analysis; Thermodynamic properties. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001200872 |
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| Botelho,Fernando M.; Boschiroli Neto,Nilso J.; Botelho,Silvia de C. C.; Oliveira,Gabriel H. H. de; Hauth,Michele R.. |
| ABSTRACT Knowledge of the water sorption phenomenon in Brazil nut seeds will allow proper handling of this product, especially with regard to adequate conditions for safe storage. Thus, the present study aimed to determine the sorption isotherms (desorption and adsorption) of Brazil nuts, fitting different mathematical models to the experimental data, as well as to examine the hysteresis effect. To obtain the sorption isotherms, the static method was employed at temperatures of 25, 35, 45 and 55 °C and air relative humidities varying from 10 to 80%. The psychrometric conditions of the air were acquired with the aid of acid solutions and specific saturated saline left inside desiccators with the samples. It was verified that for a given isotherm, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bertholletia excelsa; Moisture content; Hysteresis; Mathematical modeling. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001000776 |
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| Goneli,André L. D.; Corrêa,Paulo C.; Oliveira,Gabriel H. H. de; Oliveira,Ana P. L. R. de; Orlando,Roberto C.. |
| ABSTRACT Knowledge on the water sorption within agricultural products is extremely important for decision making during post-harvest procedures. In order to improve this knowledge, thermodynamic properties regarding water sorption provide useful data. Thermodynamic properties of castor beans, related to sorption, were determined. Static gravimetric technique under different conditions of temperature (25, 35, 45 and 55 ± 1 °C) was used. Saturated salt solutions in the range of 37-87% ± 2% were utilized to create the required controlled humidity environment. After the sorption procedure, differential enthalpy, differential entropy and Gibbs free energy of this process were calculated and decreased with increased values of equilibrium moisture content. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ricinus communis L.; Moisture content; Enthalpy–entropy compensation theory. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000800757 |
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| Cardoso Neto,Sebastião Rodrigues; Resende,Osvaldo; Costa,Lilian Moreira; Oliveira,Daniel Emanuel Cabral de. |
| ABSTRACT The aim of this study was to assess the drying behavior and quality of crambe fruit seeds dried with natural air and submitted to different airflows in stationary dryers. Dryings were carried out in July and September 2014. The experiment consisted of three treatments of drying the crambe fruits with natural air in stationary dryers with airflows of 10.08, 15.05, and 25.03 m3 min−1 t−1 and a control treatment composed of crambe fruits with an initial moisture content without going through the drying process. After drying, tests of moisture content, germination, germination rate index, and electrical conductivity were performed in order to compare the treatments. The data were submitted to analysis of variance and mean comparison by the Tukey's... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Moisture content; Physiological quality; Biodiesel. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400592 |
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| Sousa,Kelly Aparecida de; Resende,Osvaldo; Ullmann,Renan; Smaniotto,Thaís Adriana de Souza. |
| ABSTRACT The objective of this study is to determine the effect of moisture content on rupture strength, maximum strength, and rupture deformation for fixed deformations, and determine the proportional deformation modulus of seeds of Raphanus sativus subjected to compressive loading. Seeds with a moisture concentration of 0.31, 0.18, 0.12, 0.08, and 0.05 decimal (dry basis, d.b.) were maintained in the natural resting position and were subjected to uniaxial compressive loading between two parallel plates at an application rate of 0.002 m s-1. The rupture strength necessary to deform the seeds was increased from 15.03 to 27.08 as moisture levels decreased. Deformation was increased from 0.12-3 m to 0.15 × 10-3 m as moisture content decreased. The maximum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Radish; Deformation module; Moisture content. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300437 |
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| TILLMANN,M.A.A; CICERO,S.M. |
| The objective of the present paper was to compare the seed water content of maize and soya, obtained by the oven method at different temperatures and the Karl Fischer method. The water contents used were 11.2 %, 12.8 % and 16.2 % for maize and 10.7 %, 12.4 % and 16.0 % for soya. Samples were dried for a sufficiently long time in order to obtain the same results in both methods. The results indicate that the official method for seed moisture determination (105oC oven method) should be revised in order to obtain more reliable results. The drying time in the oven varied according to the seed water content and the temperature used. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed; Moisture content; Karl Fisher. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161996000100009 |
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| Pracha Boonyasirikool; Maradee Phongpipatpong; Chulaluck Charunuch; Tavisa Lohana; Vayooha Sontes. |
| corotating twin screw extruder was used together with response surface rnethodology to study the effect of feed moisture content and particle size on the characteristics of corn extrudates.The operating conditions were fixed at screw speed 250 rpm, banel temperature 140'C, fecd rate 16 kg/hr. The independent variables were selected at 4 levels (13.62,15.16, 16.66 and lg.llo/o wb) for feed moisture contents and at 5levels (0.18,0.38,0.84, 1.01, 1.35 mm.) for parriclc sizc. Response variables were expansion ratio, bulk density. breaking force, water absorption index and water solubility index. Regression analysis showed that change in all responses for corn extrudates were promoted by feed moisture content rather than partide size of feed. The seconcl ordcr... |
| Tipo: PhysicalObject |
Palavras-chave: Corn extrudates produced; Characteristics; Particle size; Extruder; Moisture content; อาหารขบเคี้ยว; ผลิตภัณฑ์อาหารเช้า; ข้าวโพดบด; ขนาดอนุภาค; ความชื้น; เครื่องเอ็กซ์ทรูดเดอร์แบบสกรูคู่; วัตถุดิบ; คุณภาพผลิตภัณฑ์. |
| Ano: 2012 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5125 |
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| Registros recuperados: 87 | |
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