ABSTRACT
This study aimed to compare the temperatures in the mass of bulk soybeans (Glycine max) in warehouses with isolated vents and vent-combined exhaustion. A completely randomized design was used, with two treatments and ten repetitions. Treatments consisted of warehouse with curved vents and warehouse with curved + static exhaust vents. Each repetition contained the average of all readings in three days in all cables of the warehouse part under study, totaling 10 repetitions per month. The variable analyzed was the temperature in the grain mass in the lower, middle and upper parts of the warehouse from January to May 2012. The environment temperature and humidity were also registered. Static hoods, along with curved vents on the roof of the warehouse showed a tendency to reduce the temperature of the soybean mass with decrease in environmental temperature and increase in relative environmental humidity.(AU)
Este trabalho teve por objetivo comparar as temperaturas na massa de grãos de soja (Glycine max) a granel, em armazéns verticais metálicos munidos de respiros isolados e em conjunto com exaustores. Foi utilizado o delineamento experimental inteiramente casualizado, sendo dois tratamentos com dez repetições. Os tratamentos consistiram em armazém com respiros curvos e armazém com respiros curvos + exaustores estáticos. Cada repetição continha a média das leituras de três dias em todos os cabos do setor do armazém em estudo, totalizando as 10 repetições por mês. A variável analisada foi a temperatura na massa de grãos nos terços inferior, médio e superior do armazém, do mês de janeiro ao mês de maio de 2012. Também se registrou a temperatura e umidade relativa ambiente. Conclui-se que os exaustores estáticos, agregados aos respiros curvos no teto do armazém, apresentam tendência de redução da temperatura na massa de grãos de soja com decréscimo da temperatura e aumento da umidade relativa do ar ambiente.(AU)
Subject(s)
Glycine max , Food Storage/methods , Storage Tanks/methods , Storage Tanks/analysis , Crops, Agricultural , VentilationABSTRACT
This study aimed to compare the temperatures in the mass of bulk soybeans (Glycine max) in warehouses with isolated vents and vent-combined exhaustion. A completely randomized design was used, with two treatments and ten repetitions. Treatments consisted of warehouse with curved vents and warehouse with curved + static exhaust vents. Each repetition contained the average of all readings in three days in all cables of the warehouse part under study, totaling 10 repetitions per month. The variable analyzed was the temperature in the grain mass in the lower, middle and upper parts of the warehouse from January to May 2012. The environment temperature and humidity were also registered. Static hoods, along with curved vents on the roof of the warehouse showed a tendency to reduce the temperature of the soybean mass with decrease in environmental temperature and increase in relative environmental humidity.
Este trabalho teve por objetivo comparar as temperaturas na massa de grãos de soja (Glycine max) a granel, em armazéns verticais metálicos munidos de respiros isolados e em conjunto com exaustores. Foi utilizado o delineamento experimental inteiramente casualizado, sendo dois tratamentos com dez repetições. Os tratamentos consistiram em armazém com respiros curvos e armazém com respiros curvos + exaustores estáticos. Cada repetição continha a média das leituras de três dias em todos os cabos do setor do armazém em estudo, totalizando as 10 repetições por mês. A variável analisada foi a temperatura na massa de grãos nos terços inferior, médio e superior do armazém, do mês de janeiro ao mês de maio de 2012. Também se registrou a temperatura e umidade relativa ambiente. Conclui-se que os exaustores estáticos, agregados aos respiros curvos no teto do armazém, apresentam tendência de redução da temperatura na massa de grãos de soja com decréscimo da temperatura e aumento da umidade relativa do ar ambiente.
Subject(s)
Food Storage/methods , Glycine max , Storage Tanks/analysis , Storage Tanks/methods , Crops, Agricultural , VentilationABSTRACT
The blood profile of hybrid fish was studied. Pseudoplatystoma (P. coruscans X P. reticulatum) were submitted to different stocking densities in recirculating water system in two distinct phases of production. Hemoglobin concentration (Hg), packed cell volume (PCV) and mean corpuscular hemoglobin concentration (MCHC) were evaluated. There was no difference between the studied densities. Hemoglobin concentration, PCV and MCHC remained within the normal range for teleost fish.(AU)
Subject(s)
Animals , Fishes/growth & development , Fisheries/methods , Water Recirculation/methods , Storage Tanks/methods , Biological Filters , Blood Chemical Analysis/veterinary , HemoglobinsABSTRACT
Para determinar el efecto del estrés a nivel del aparato digestivo, organismos de la especie Paralabrax maculatofasciatus fueron sometidos a dos modelos de estrés: el primero por descenso en el nivel del agua (n=84) por 30 y 60 minutos diariamente, y el segundo por cultivo a altas densidades (n=96) de 1,6 y 3,2 kg/100 1. Se tomaron muestras de estómago e hígado y se fijaron en formol al 10%. Los tejidos fueron incluidos en parafina, realizándose cortes de 6 um que se tiñeron con H-E. En ambas condiciones de estrés el estómago presentó cambios morfológicos importantes tales como hipertrofia y atrofia en la capa mucosa. En el hígado se observaron cambios de coloración y textura, así como hemolisis, inflamación y necrosis. Por descenso en el nivel del agua el estómago presentó diferencias morfométricas significativas (P<0,05), entre los diferentes tiempos de exposición al estrés y/o entre los días de muestreo en algunos de los parámetros medidos. Por cultivo a altas densidades, se observaron diferencias significativas en algunos parámetros, 4 de ellos presentaron interacción densidad-muestreo y el resto presentaron diferencias significativas sin interacción. El hígado presentó diferencias significativas (P<0,05) en el perímetro nuclear entre los diferentes días de muestreo. El estrés provocado por alta densidad de cultivo resultó ser el factor que provocó daños tisulares más severos en los órganos estudiados, de ahí la importancia de mantener las condiciones adecuadas en los cultivos, como son el nivel de agua y el número de organismos por estanque.
To determine stress effects at histological level in the digestive system, organisms of Paralabrax maculatofasciatus were submitted to 2 stress models. One of decreasing the water level (n=84) for 30 and 60 min daily, and another at high density cultures (n=96) of 1.6 and 3.2 Kg/1001. Stomach and the liver samples were fixed in 10% formalin, embedded in paraffin wax, sectioned at 6 urn and stained with haematoxylin-eosin. In both stress conditions, the stomach showed important morphological changes in the mucosa layer, such as hypertrophy and atrophy. In the liver, coloration and texture changes were observed as well as haemolisis, inflammation and necrosis. In the water decrease model, the mucosa layer of stomach showed significant morphometric differences (P<0.05), between different times of stress exposure and/or between different days, in some of the measured parameters. In the high-density model, significant differences in the stomach mucosa showed a sampling-density interaction in 4 parameters and 6 other parameters showed differences with no interaction. Liver showed significant differences in nuclear perimeter between sampling-days. Stress caused by high-density culture proved to be the factor that caused the most serious tissue damage.