SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

San Martín Hernández, César.

En el mundo moderno, la producción de alimentos demanda tecnologías más eficientes y en armonía con el ambiente. Esta investigación se efectuó con el propósito de evaluar la producción de tomate en condiciones protegidas e hidroponía, caracterizando previamente las propiedades físicas del sustrato, el cual consistió en mezclar cuatro tamaños de partícula de escoria volcánica roja “tezontle” (Tez) de 3-5, 5-10, 10-20 y 20-30 mm de diámetro con polvo y fibra de coco (PFC) en la proporciones 1:0, 3:1 y 1:1 (Tez:PFC). En contenedores con 24 L de sustrato, se trasplantaron tres plántulas de tomate. Las plantas se regaron con la solución Steiner aplicando solo la fracción de humedad del rango “agua fácilmente disponible”. Mensualmente se monitoreó la...

Palavras-chave: Escoria volcánica roja; Tamaño de partícula; Propiedades físicas; Polvo y fibra de coco; Hidroponía; Red volcanic scoria; Particle size; Physical properties; Dust and fiber coconut; Hydroponics; Maestría; Edafología.

Ano: 2011

URL: http://hdl.handle.net/10521/407

Producción de tomate (Solanum lycopersicum L.) en diferentes granulometrías de "tezontle".

San Martín Hernández, César.

Ano: 2011

URL: http://hdl.handle.net/10521/407

Monitoreo de la retención y absorción de agua en sustratos de diferente granulometría.

Monitoreo de la retención y absorción de agua en sustratos de diferente granulometría.

Pineda Marín, Luis.

Se evaluó el efecto del tamaño de partícula y frecuencia de riego en los cultivos de lechuga (Lactuca sativa) y jitomate (Solanum esculentum Mill) en semillero mantenidos en un invernadero tipo túnel. Las mezclas de sustratos fueron: fibra de coco-tezontle (Fc-Tz) (75:25 v/v) con dos tamaños de partícula (1-2 y 2-3 mm) y peat moss (sustrato comercial a granel) como testigo y las frecuencias de riegos (FR): 1 riego y dos riegos diarios (1RD y 2RD, respectivamente) y un riego cada tercer día (1RTD). Los nueve tratamientos se analizaron en un bloques al azar para dos factores con tres repeticiones. Se utilizaron charolas de unicel de 200 cavidades utilizando 30 cavidades por unidad experimental. Al tiempo del trasplante se evaluó: longitud de raíz...

Palavras-chave: Tamaño de partícula; Mezcla de sustratos; Retención de humedad; Sensores de humedad; Particle size; Substrate mixtures; Moisture retention; Moisture sensors; Maestría; Edafología.

Ano: 2011

URL: http://hdl.handle.net/10521/563

SIMPÓSIO SOBRE GRANULOMETRIA DE INGREDIENTES E RAÇÕES PARA SUÍNOS E AVES, 1998, Concórdia..

Pineda Marín, Luis.

Ano: 2011

URL: http://hdl.handle.net/10521/563

Anais.

Infoteca-e

Granulometria de rações: aspectos fisiológicos; Influência de ingredientes de dietas no desenvolvimento de lesões gástricas em suínos; Granulometria do milho em rações para suínos e aves: digestibilidade de nutrientes e desempenho animal; Granulometria de microcomponentes para rações de suínos e aves; Implicações da granulometria de ingredientes na qualidade de peletes e na economia da produção de rações; Tamanho das partículas de milho moído para rações e como medi-las facilmente através do granulômetro.

Tipo: Documentos (INFOTECA-E)

Palavras-chave: Ave; Ingredientes; Ration.; Granulometria; Ração; Suíno.; Ingredients; Poultry; Particle size; Swine..

Ano: 1998

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/433785

Suspended sediments in a macrotidal estuary: comparison and use of different sensors

Lunven, Michel; Gentien, Patrick.

Measurements made using an in situ particle-sizer (PSA) were compared to those of an optical backscatter sensor (OBS) in a macrotidal estuary. Both estimate the total volume of particles. After comparison with dry weight of suspended matter sampled in the study area, the different measurements were converted into dry weight. In three different kinetic energy regimes, times series were coherent for most of the observations. Discrepancies of suspended sediment concentrations estimated by both sensors appeared under specific hydrodynamic conditions: they were related to occurrences of definite particle populations. Overestimations and underestimations of measurements by the instruments depend on the optical principles of the sensors (backscatter and...

Tipo: Text

Palavras-chave: Particle size; Suspended particulate matter; Aggregates; Taille de particule; Matières en suspension; Agrégats.

Ano: 2000

URL: http://archimer.ifremer.fr/doc/2000/publication-521.pdf

Relations trophiques entre huitre et milieu; influence de la concentration et de la taille des particules

Alimentation expérimentale de l'huître Crassostrea gigas à l'aide de navicules bleus Haslea ostrearia (Simonsen) de différentes tailles

Filia, M; Copello, M; Colomines, J.

At 15 degree C, different concentrations of Phaeodactylum tricornutum are given to Crassostrea gigas . Ingestion, filtration, respiration, ammonia excretion have been measured. All ecophysiological response, except dissolved excretion, are dependent of food concentration. Energy balances have been determined and selectivity of particle size observed.

Tipo: Text

Palavras-chave: Crassostrea gigas; Bivalvia; Phaeodactylum tricornutum; Algae; Diets; Excretion; Respiration; Water filtration; Ingestion; Particle size; Energy balance; Food availability; Ecophysiology; Bilan énergétique; Ecophysiologie; Huître.

Ano: 1983

URL: http://archimer.ifremer.fr/doc/1983/acte-1178.pdf

Barille, Laurent; Bougrier, Serge; Geairon, Philippe; Robert, Jean-michel.

The influence on the feeding physiology (clearance, filtration, ingestion, absorption) of the Japanese oyster Crassostrea gigas of low concentrations of suspended particulate matter (SPM ranging from 2 to 20 mg.l-l) and high food quality (mean organic fraction =54 %) was studied in the laboratory. Experimental diets were made up with three strains of the "blue diatom" Haslea ostrearia, which is responsible of the greening of oyster-ponds. The strains were characterized by different sizes (48, 65 and 98 µm respectively) but possessed the same density and biochemical composition. Clearance rate was found constant at 2.2 1.h(-l).g-l dry weight and therefore was not influenced by increasing seston load. Pseudofaeces production was observed for SPM...

Tipo: Text

Palavras-chave: Taille des particules; Qualité alimentaire; Haslea ostrearia; Crassostrea gigas; Alimentation; Particle size; Food quality; Haslea ostrearia; Crassostrea gigas; Feeding.

Ano: 1994

URL: http://archimer.ifremer.fr/doc/1994/publication-3070.pdf

Influence of suspended mussel lines on sediment erosion and resuspension in Lagune de la Grande Entrée, Îles-de-la-Madeleine, Québec, Canada

Walker, Tony R.; Grant, Jon; Weise, Andrea M.; Mckindsey, Christopher W.; Callier, Myriam D.; Richard, Marion.

Downward fluxes of organically rich biodeposits under suspended mussel lines can cause benthic impacts such as changes in benthic community structure or microbial mat production. Quantifying sediment erosion in these coastal ecosystems is important for understanding how fluxes of organic matter and mussel biodeposits contribute to benthic–pelagic coupling. Critical shear velocity (u*crit), erosion rates and particle size distributions of resuspended sediment were measured at four stations distributed along a transect perpendicular to a mussel farm in Lagune de la Grande Entrée, Îles-de-la-Madeleine (Quebec, Canada). Stations were selected underneath the outer-most mussel line (0 m) and at distances of 15, 30 m and at a reference station (500 m) further...

Tipo: Text

Palavras-chave: Sediment erosion; Shear velocity; Resuspension; Biodeposits; Particle size; Mytilus edulis.

Ano: 2014

URL: http://archimer.ifremer.fr/doc/00202/31287/31925.pdf

Methane Hydrate Formation and Dissociation in Sand Media: Effect of Water Saturation, Gas Flowrate and Particle Size

Benmesbah, Fatima; Ruffine, Livio; Clain, Pascal; Osswald, Véronique; Fandino Torres, Olivia; Fournaison, Laurence; Delahaye, Anthony.

Assessing the influence of key parameters governing the formation of hydrates and determining the capacity of the latter to store gaseous molecules is needed to improve our understanding of the role of natural gas hydrates in the oceanic methane cycle. Such knowledge will also support the development of new industrial processes and technologies such as those related to thermal energy storage. In this study, high-pressure laboratory methane hydrate formation and dissociation experiments were carried out in a sandy matrix at a temperature around 276.65 K. Methane was continuously injected at constant flowrate to allow hydrate formation over the course of the injection step. The influence of water saturation, methane injection flowrate and particle size on...

Tipo: Text

Palavras-chave: Gas hydrate; Porous media; Kinetics; Methane storage estimate; Water saturation; Gas flowrate; Particle size.

Ano: 2020

URL: https://archimer.ifremer.fr/doc/00654/76593/77741.pdf

Surface enhanced Raman scattering optimization of gold nanocylinder arrays: Influence of the localized surface plasmon resonance and excitation wavelength

Natural invertebrate hosts of iridoviruses (Iridoviridae)

Guillot, N.; Shen, H.; Fremaux, B.; Peron, Olivier; Rinnert, Emmanuel; Toury, T.; De La Chapelle, M. Lamy.

We here emphasize that the surface enhanced Raman scattering (SERS) intensity has to be optimized by choosing the appropriate gold nanoparticles size for two excitation wavelengths; 632.8 and 785 nm. We discuss the role of the position and of the order of the localized surface plasmon resonance (LSPR) in such optimization for both wavelengths. At 632.8 nm, the best SERS intensity is reached for a LSPR located between the excitation and Raman wavelengths whereas at 785 nm, the LSPR should be placed outside this range. The third order of LSPR is shown to have no influence on the SERS intensity. (C) 2010 American Institute of Physics. [doi:10.1063/1.3462068]

Tipo: Text

Palavras-chave: Gradient index optics; Lenses; Metamaterials; Microwave photonics; Optical design techniques; Optical fabrication; Particle size.

Ano: 2010

URL: http://archimer.ifremer.fr/doc/00011/12240/8970.pdf

Neotropical Entomology

Williams,Trevor.

Invertebrate iridescent viruses (IIVs) are icosahedral DNA viruses that infect invertebrates, mainly insects and terrestrial isopods, in damp and aquatic habitats. Exhaustive searches of databases resulted in the identification of 79 articles reporting 108 invertebrate species naturally infected by confirmed or putative iridoviruses. Of these, 103 (95%) were arthropods and the remainder were molluscs, an annelid worm and a nematode. Nine species were from marine habitats. Of the 99 non-marine species, 49 were from terrestrial habitats and 50 were aquatic, especially the aquatic stages of Diptera (44 species). The abundance of records from species of Aedes,Ochlerotatus and Psorophora contrasts markedly with a paucity of records from species of...

Interpretation of particle spectra of electronic counters by microscopical methods

Palavras-chave: Infection; Natural host; Location; Particle size; Prevalence; Virus characterization data.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000600001

OMA

Bakker, C.; Prins, T.C.; Tackx, M.L.M..

1. Using monocultures or single species dominated natural phytoplankton, cell counts and volume estimations obtained by visual and electronic methods show reasonable agreement.Calibration seems possible (Figs.1-2).2. Further examples given (Fig. 3-4) show that microscopical identification of the volume peaks in electronic counter spectra of natural seston is not quite simple. Phytoplankton peaks may not be detected in the Counter spectrum. Shifts of Counter peaks to the left side of the visual spectrum may be found when cylindrical, elongated or needle- like phytoplankton dominate the sample.3. Both visual and electronic methods include potentially large errors. Possibly particle volume is either overestimated by the microscope and / or underestimated by...

Determination of methanesulfonic acid and non-sea-salt sulfate in single marine aerosol particles

Palavras-chave: Detritus; Grazing; Measuring devices; Particle counters; Particle size; Phytoplankton; Zooplankton.

Ano: 1985

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3195

OMA

Kolaitis, L.N.; Bruynseels, F.; Van Grieken, R.; Andreae, M.O..

In open ocean waters the predominant volatile sulfur compound is dimethyl sulfide (DMS), representing almost 90% of the marine sulfur emissions. Methanesulfonic acid (MSA), one of the oxidation products of DMS, is consequently an important constituent of marine aerosols. Laser microprobe mass analysis (LAMMA) has been used for single-particle analysis of particles collected in the marine boundary layer. MSA, like the non-sea-salt sulfate, is mainly associated with the smallest aerosol particles, whose LAMMA spectra match the reference fingerprint spectra of MSA salts, sodium methanesulfonate and ammonium methanesulfonate. The presence of nitrate and heavy metal ions in the LAMMA spectra can reveal, to a certain extent, the degree of air pollution at the...

Effect of the calcium level and limestone particle size on the performance of semi-heavy layers in the second cycle of egg production

Palavras-chave: Aerosols; Air pollution; Boundary layers; Heavy metals; Marine environment; Nitrates; Particle size; Sulphates.

Ano: 1989

URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3177

Rev. Bras. Ciênc. Avic.

Pizzolante,CC; Garcia,EA; Laganá,C; Saldanha,ESPB; Deodato,AP; Faitarone,ABG; Scherer,MR; Batista,L.

An experiment was carried out at the Research and Development Unit of Brotas aiming at evaluating dietary calcium level and limestone particle size on the production performance of commercial (Hy-Line Brown) layers in the second lay cycle. Experiment duration was 112 days. A total number of 288 hens, with 83 weeks of age in the beginning of the experiment, were used in a completely randomized experimental design in a factorial arrangement of 2x3, with two calcium levels (3.5 and 4.0%) and three limestone particle size compositions: 100% fine limestone (FL), 30% coarse limestone (CL) + 70% fine limestone (FL), and 50% (CL) + 50% (FL), with six replicates of eight birds each. Egg weight (g), egg production (%), egg mass (%), feed intake (g), feed conversion...

Limestone and oyster shell for brown layers in their second egg production cycle

Palavras-chave: Calcium; Laying hens; Limestone; Particle size; Performance.

Ano: 2006

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000300006

Rev. Bras. Ciênc. Avic.

Pizzolante,CC; Kakimoto,SK; Saldanha,ESPB; Laganá,C; Souza,HBA; Moraes,JE.

This study aimed at evaluating the effect of dietary calcium levels and the replacement of calcium sources with different particle size compositions on the performance and egg quality of brown layers in their second egg production cycle. A randomized block experimental design was applied with 12 treatments in a 3x4 factorial arrangement: three calcium levels (2.6, 3.2, 3.8 %) and four combinations of calcium sources (1- 100% fine limestone (FL), 2- 50% FL + 50% coarse limestone (CL), 3- 50% FL and 50% oyster shell (OS), 4- 50% FL and 25% CL+ 25 %OS), with six replicates of eight birds each. Calcium sources were analyzed for geometric mean diameter (GMD) and in-vitro solubility. The following performance and egg quality parameters were evaluated: egg weight...

Corn texture and particle size in broiler diets

Palavras-chave: Egg quality; Levels; Minerals; Particle size; Performance; Sources.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200004

Rev. Bras. Ciênc. Avic.

Benedetti,MP; Sartori,JR; Carvalho,FB; Pereira,LA; Fascina,VB; Stradiotti,AC; Pezzato,AC; Costa,C; Ferreira,JG.

The objective of this study was to evaluate the effect of corn texture and the particle size on broiler performance, carcass yield, nutrient digestibility, and digestive organ morphometrics. In Experiment I, 720 male Cobb chicks were distributed in a completely randomized experimental design with a 2 x 3 factorial arrangement, consisting two corn textures (dented and hard) and three corn particle sizes, was applied, with four replicates of 30 birds each. Corn particle size was classified according to geometric mean diameter (GMD) as fine - 0.46 mm; medium - 0.73 mm, and coarse - 0.87 mm. In Experiment II, 120 broiler chicks were used to evaluate corn digestibility during the periods of 16 to 22 days and 35 to 41 days of age, using the method of total...

Effectiveness of fused magnesium potassium phosphate for marandu grass

Palavras-chave: Carcass traits; Digestibility; GMD; Particle size; Performance.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000400002

Rev. Bras. Ciênc. Solo

Orioli Júnior,Valdeci; Coutinho,Edson Luiz Mendes.

The current high price of KCl and great dependence on importation to satisfy the Brazilian demand indicate the need for studies that evaluate the efficiency of other K sources, particularly those based on domestic raw material. For this purpose, a greenhouse experiment was conducted with samples of a sandy clay loam Typic Haplustox, in a completely randomized 4 x 3 x 2 factorial design: four K rates (0, 60, 120, and 180 mg kg-1), three sources (potassium chloride (KCl), fused magnesium potassium phosphate (FMPP) and a mixture of 70 % FMPP + 30 % KCl) and two particle sizes (100 and 60 mesh), with three replications. Potassium fertilization resulted in significant increases in shoot dry matter production and in K concentrations, both in soil and plants. The...

Sediment Morphology, Distribution, and Recent Transport Dynamics in a Reforested Fragment

Palavras-chave: Brachiaria brizantha; Particle size; Critical level.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600034

Rev. Bras. Ciênc. Solo

Bovi,Renata Cristina; Silva,Laura Fernanda Simões da; Zenero,Mariana Delgado Oliveira; Carvalho,Camila Carolina de; Cooper,Miguel.

Abstract Erosion generates large amounts of sediment, which may be deposited at the site of origin, on the slope of a hill, or along waterways. The transportability of each type of sediment by runoff and its potential for subsequent deposition largely depends on its morphological features and particle size distribution. The aim of this study is to describe and characterize the morphology and micromorphology of sediments deposited in a reforested area and to understand the dynamics of the transport process. In order to understand the sedimentation processes, the following analyses were performed: particle size distribution, with and without the use of a dispersant solution; statistical analysis of the sand fraction using Folk and Ward parameters; sediment...

Water retention and availability in soils of the State of Santa Catarina-Brazil: effect of textural classes, soil classes and lithology

Palavras-chave: Soil erosion; Sedimentation; Particle size; Silting.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100526

Rev. Bras. Ciênc. Solo

Costa,André da; Albuquerque,Jackson Adriano; Costa,Adriano da; Pértile,Patricia; Silva,Franciani Rodrigues da.

The retention and availability of water in the soil vary according to the soil characteristics and determine plant growth. Thus, the aim of this study was to evaluate water retention and availability in the soils of the State of Santa Catarina, Brazil, according to the textural class, soil class and lithology. The surface and subsurface horizons of 44 profiles were sampled in different regions of the State and different cover crops to determine field capacity, permanent wilting point, available water content, particle size, and organic matter content. Water retention and availability between the horizons were compared in a mixed model, considering the textural classes, the soil classes and lithology as fixed factors and profiles as random factors. It may...