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| Registros recuperados: 30 | |
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| Cantos-Lopes,Amanda; Vilela-de Resende,Juliano Tadeu; Machado,José; Perez-Guerra,Edson; Vilela-Resende,Nathalia. |
| Abstract Ethanol is one of the most promising fuels in Brazil, but its production is centralized in sugarcane cultivation, and is currently in search for other sources alcohol producing biomass to replace sugarcane monoculture. The aim of this study was to study fermentation process variables such as fermentation time (72 and 96 hours), addition of nutrients (with and without addition) and yeasts (dry and fresh organic yeast), employed in ethanol production from two sweet potato (Ipomoea batatas (L.) Lam.) genotypes: UGA 05 and UGA 77. Alcohol evaluation content in °GL was performed in a completely randomized design according to two factorial schemes (22 and 23), and results obtained were analyzed using Design Expert® software version 8. Results of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofuel; Ethanol production; Fermentation; Saccharification; Starch; Water content. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200231 |
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| PEREIRA, F. S.; ANDRIOLI, I.; MARTINS, A. L. S.. |
| O conteúdo de água em sistemas de preparo do solo são essenciais para avaliar a sustentabilidade agrícola. O objetivo deste estudo foi avaliar os efeitos do teor de água em um Latossolo Vermelho distrófi co sob diferentes sistemas de manejo: 1) Crotalária (Crotalaria juncea), em sistema de semeadura direta (SDC); 2) Milheto (Pennisetum americanum sin. Tiphoydes), em sistema de semeadura direta (SDM); 3) Lablabe (Dolechus lablab), em sistema de semeadura direta (SDL); 4) Semeadura convencional após uma gradagem aradora e duas niveladoras (SSC) e 5) pousio. A propriedade física do solo foi avaliada nas camadas 0,5-0,10 m e 0,15-0,20 m . A curva de retenção de água foi mais influenciada pelo SDM na camada 0,5-0,10 m. |
| Tipo: Separatas |
Palavras-chave: Curva de retenção de água no solo; Sustentabilidade; Plantio direto; Latossolo vermelho; Oxisols; Tillage; Water content. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1002763 |
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| SOUZA, J. M. L. de; LIMA, M. S. de; NASCIMENTO, F. C. da C.; ALVARES, V. de S.; YOMURA, R. B. T.; NASCIMENTO, M. M. do. |
| O valor econômico do cupuaçu baseia-se na industrialização e comercialização da polpa, muito apreciada em sucos, cremes, sorvetes e doces em pasta. As amêndoas de cupuaçu possuem características botânicas e químicas que as assemelham ao cacau, além de diferenciada composição em aminoácidos, o que possibilitaria sua utilização na fabricação de produtos semelhantes ao chocolate. Porém, frequentemente, as amêndoas são descartadas como resíduos das agroindústrias. Este trabalho teve como objetivo comparar as características de composição centesimal e físico-química das amêndoas de cupuaçu fermentadas e despeliculadas e da torta parcialmente desengordurada, visando a sua utilização como matéria-prima para a indústria de alimentos. Houve diferença significativa... |
| Tipo: Parte de livro |
Palavras-chave: Torta parcialmente desengordurada; Almendras; Fermentación; Projeto RECA; Secado; Condiciones de almacenamiento; Contenido de agua; Nova Califórnia (RO); Extrema (RO); Rondônia; Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Cupuaçu; Theobroma Grandiflorum; Amêndoa; Fermentação; Secagem; Armazenamento; Teor de Umidade; Almonds; Fermentation; Drying; Storage conditions; Water content. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125453 |
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| Mendonça,Thaís G.; Silva,Marília B. da; Pires,Regina C. de M.; Souza,Claudinei F.. |
| ABSTRACT Agriculture is one of the segments that most uses water and developments have been made to save irrigation water. Deficit irrigation is a technique that can contribute to production and water saving in agriculture. This study aimed to evaluate the viability of deficit irrigation in tomato production irrigated by subsurface drip in a greenhouse and estimate water saving. The experiment was conducted at the CCA/UFSCar, in Araras, São Paulo, Brazil, with grape tomato cultivation. It consisted of three treatments, 100 % water depth and deficit irrigation (75 and 50 % of water depth), with a randomized block design. Irrigation management was performed using mean soil moisture data collected through TDR probes installed in each treatment. Tomato plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: TDR; Water resources; Irrigation management; Water content. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400453 |
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| Corrêa,Paulo Cesar; Baptestini,Fernanda Machado; Zeymer,Juliana Soares; Araujo,Marcos Eduardo Viana de; Freitas,Rita Cristina Pereira de; Leite,Rildo Araujo. |
| ABSTRACT Dehydration of plant products extends its shelf life and reduces its mass and volume, which increases transport and storage efficiency and adds value to food. However, it is an intensive process in energy and time, making necessary the search for more efficient technologies, Thus, this study aimed to investigate the infrared ginger dehydration process by approaching the constant period of dehydration to the theory of mass and heat transfer process to the wet bulb thermometer and the decreasing period of dehydration to liquid diffusion theory. We submitted 5.0 mm thickness and 2.0 cm diameter slices to a dryer with infrared radiation at 50, 60, 70, 80, 90 and 100 °C until constant mass. Heat and mass transfer coefficients, and effective diffusion... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modified Henderson and Pabis; Radiation; Water content; Zingiber officinale. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100400 |
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| Mansour, Rassoul; Rioual, S.; Lescop, B.; Talbot, P.; Abboud, M.; Farah, W.; Tanné, G.. |
| In this study, a sensor based on the development of a planar antenna immersed in sediments dedicated to water content monitoring in this type of material is proposed and experimentally validated. It is produced by a conventional Printed Circuit Board (PCB) manufacturing process on a double-sided metalized FR4 substrate. The sensitivity of the sensor is ensured by the variation of the real part of the complex dielectric permittivity of sediments with water content at around 1 GHz. As shown, in this frequency range, electrode polarization and Maxwell–Wagner polarization e ects become negligible, leading to only a bulk water polarization sensitivity. The sensor operates in the reflection mode by monitoring the variation of the resonant frequency as a function... |
| Tipo: Text |
Palavras-chave: Resonant sensor; Water content; Dielectric characterization; Microwave; Antenna; Sediments. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00610/72167/70939.pdf |
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| Alkimim,Emilly R.; David,Andréia M. S. de S.; Sousa,Tiago V.; Rodrigues,Cleiton G.; Amaro,Hugo T. R.. |
| ABSTRACT The season of harvest is one of the most important factors influencing seed quality. This study evaluated the effect of different harvesting times on the physiological quality of Coriandrum sativum L. seeds, cv. Palmeira. The experimental design was completely randomized, with six treatments (harvest times) and four replications. The experiment was conducted during the months of April to October 2010. The first moment to harvest seeds was carried out 15 days after full bloom, when approximately 50% of plants were in flowering phase. Other harvests (22, 29, 36, 43 and, 50 days after bloom) were carried out at 7 days intervals until the seeds reached 16.0% of moisture, which occurred in the 6th harvest. Immediately after each harvest, the seeds were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coriandrum sativum L.; Germination; Vigor; Water content. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200133 |
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| Torres Suárez, Sandra Luz. |
| El trabajo de investigación fue conducido en el campo experimental del campus Montecillo del Colegio de Postgraduados. Cuyo objetivo principal fue observar si existe afectación en el contenido de agua presente en el suelo, debida a una conformación diferente de surcos y la colocación de contras a lo largo de los mismos. La variedad de semilla utilizada fue San Josecito, sembrada el día 2 de junio de 2006. El diseño experimental fue el de Bloques Completos con Tratamientos Aleatorizados, con 4 repeticiones, disponiéndose de una superficie total de 1500 m2. Los tratamientos probados consistieron en: Arada pacial con contras a cada 3 m (Trat A), surco tipo Anaya (inclinado) con contras a cada 3 m (Trat B), Surco normal con contras a cada 3 m (Trat C)... |
| Tipo: Tesis |
Palavras-chave: Maíz; Microcuencas; Termporal; Contenido de humedad; Maestría; Hidrociencias; Corn; Micro-basins; Rainfed; Water content. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1520 |
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| FIGUEIREDO, M. A. de; COELHO, S. V. B.; ROSA, S. D. V. F. da; VILELA, A. L.; SILVA, L. C.. |
| Cryopreservation is a viable option for conservation of coffee germplasm. However, for this technique to be completely successful, it is of fundamental importance to carry out studies that ensure maintenance of cell integrity before and after immersion in liquid nitrogen (LN). Therefore, the aim in this study was to investigate the water content, cooling rate, and final temperature most suitable for cryopreservation of Coffea arabica L. seeds. The seeds were dried by silica gel to water contents of 5, 10, 15, 20, 30 and 40 % wb, subjected to slow cooling treatments at speeds of -1, -3 and -5 °C min.-1 to final temperatures of -40, -50 and -60 °C and then directly immersed in LN. After storage, seeds were rewarmed at 40 °C for two minutes. The survival rate... |
| Tipo: Artigo de periódico |
Palavras-chave: Coffee; Slow cooling; Liquid nitrogen; Teor de água; Resfriamento lento; Nitrogênio líquido.; Café; Water content; Silica gel.. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1081992 |
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| Cholaky,Carmen; Cisneros,José M; Balbuena,Roberto. |
| Initial soil conditions, operational aspects, and tool shape affect the efficiency of soil decompaction. The objective of this study was to evaluate the performance of a winged scarifier as a function of soil compaction and edaphic water content. The experiment was carried out in a typical Hapludoll. Treatments considered two soil compaction levels: high (HC) and low compaction (LC); and three soil water contents: wet (WS), humid (HS), and dry (DS) with 9, 14, and 19% gravimetric water content, respectively. A split-plot randomized block design was applied. Tractive effort, disturbed area, tillage depth, specific resistance, and power were evaluated. Results showed that tractive effort was 17% greater in HC than LC, and in both cases HS was greater than WS... |
| Tipo: Journal article |
Palavras-chave: Agricultural engineering; Winged scarifier; Bulk density; Water content; Compaction. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100016 |
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| SILVA FILHO, A. M.; SILVA, C. L. B.; OLIVEIRA, M. A. A.; PIRES, T. G.; ALVES, A. J.; CALIXTO, W. P.; NARCISO, M. G.. |
| This paper presents the study of the relationship between electrical properties and physical characteristics of the soil. Measures of apparent electrical resistivity of the soil were made for different types of soil, varying moisture content gradually while maintaining a constant compaction, and then varying the compaction and relating it to a constant humidity. Development of a correlation surface is proposed in order to identify granulometry of the soil from moisture and compaction measurements. For the study of spatial variability, two areas were chosen to allow the change of moisture content and compaction in order to verify the measurement capacity of apparent electrical resistivity of the soil as methodology to identify change in soil dynamics.... |
| Tipo: Artigo de periódico |
Palavras-chave: Apparent electrical resistivity; Geoelectric prospecting; Water content; Soil compaction; Soil properties. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078731 |
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| Coradi,Paulo C.; Sousa,Alisson H. S. de; Camilo,Lucas J.; Lima,Roney E.; Milane,Lélia V.; Lemes,Ângelo F. C.. |
| ABSTRACT The aim was to evaluate the physical quality of conventional and transgenic corn grains, through drying and wetting processes for marketing. The experimental design was completely randomized in a factorial scheme (7 x 3 x 2), corresponding to seven drying times (0, 20, 40, 60, 80, 100 and 120 min), three temperatures of the drying air (80, 100 and 120 °C) and two hybrids of corn (conventional AG 1051 and transgenic Herculex@ 30S31H). Grain drying was held in convection oven with forced air ventilation while the wetting was done in a B.O.D chamber. The water movement in the grain, the volume and the electrical conductivity were evaluated periodically. The results showed that the transgenic corn grain reduced the negative effects of drying and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AG 1051; Herculex@ 30S31H; Water content; Temperature. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000900847 |
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| Smiderle,Oscar José; Souza,Aline das Graças; Alves,José Maria Arcanjo; Barbosa,Cylles Zara dos Reis. |
| ABSTRACT The aim of this study was to evaluate physiological quality in the seeds of four cowpea cultivars during nine months of storage. The cowpea cultivars used were BRS Mazagão, UFRR Grão Verde, Pretinho Precoce 1 and BRS Guariba, produced intercropped with cassava in the experimental area of the Centre for Agrarian Science of the Federal University of Roraima, in Boa Vista. After harvest, the seeds were dried, hand cleaned, placed in PET bottles and stored for nine months at a temperature of 23 ºC and a relative humidity of 60% at the Seed Analysis Laboratory of Embrapa Roraima. Data analysis was carried out in a completely randomised design, in a 4 x 4 factorial scheme with eight replications. The physiological quality of the seeds was evaluated at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata; Water content; Test for vigour. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000500817 |
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| Moreira,Wagner Henrique; Tormena,Cássio Antônio; Betioli Junior,Edner; Figueiredo,Getulio Coutinho; Silva,Álvaro Pires da; Giarola,Neyde Fabíola Balarezo. |
| The least limiting water range (LLWR) has been used as an indicator of soil physical quality as it represents, in a single parameter, the soil physical properties directly linked to plant growth, with the exception of temperature. The usual procedure for obtaining the LLWR involves determination of the water retention curve (WRC) and the soil resistance to penetration curve (SRC) in soil samples with undisturbed structure in the laboratory. Determination of the WRC and SRC using field measurements (in situ ) is preferable, but requires appropriate instrumentation. The objective of this study was to determine the LLWR from the data collected for determination of WRC and SRC in situ using portable electronic instruments, and to compare those determinations... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Water content; Instrumentation; Critical bulk density; Soil physical quality; Matric potential. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600012 |
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| Registros recuperados: 30 | |
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