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| Pedruzi,Gerson O. L.; Amorim,Matheus L.; Santos,Raquel R.; Martins,Márcio A.; Vaz,Marcelo G. M. V.. |
| ABSTRACT Due to the emergence of large microalgae farms and increased competition in this sector, the search for higher productivity is common. One way to achieve this goal in microalgae production is to optimize the factors that influence their growth during the cultivation stage to increase the accumulation of bio-compounds of interest. In this stage, the factors that most influence are: nutrition, gas diffusion, light intensity and quality and, finally, stirring, which directly affects all other factors. Thus, a review and an evaluation of the influence and importance of stirring were performed in the present study. The nutrients that most influence biomass accumulation are carbon, nitrogen and phosphorus, but their proportion is directly related to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrition; Stirring; Lighting; Productivity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200134 |
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| Fidan,Evrim Dereli; Nazlıgül,Ahmet; Türkyılmaz,Mehmet Kenan; Aypak,Serap Ünübol; Kilimci,Figen Sevil; Karaarslan,Solmaz; Kaya,Mehmet. |
| ABSTRACT The objective of this study was to investigate the effects of photoperiod length and light intensity on leg and eye health, tonic immobility, some blood parameters, carcass, and meat quality characteristics in broilers. A total of 272 one-day-old male broiler chicks (Ross 308) were randomly assigned to four treatment groups based on the photoperiod length (23L:1D or increasing duration of light) and light intensity (20 lux vs. dim light) with four replicates. In this study, photoperiod lenght had no effect on incidence of foot pad and hock burn. On the other hand, the effect of photoperiod lenght had significant influence on the gait score. The incidences of gait score (3 + 4 + 5) in bright and dim light groups was found as 21.4 and 41.0% in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass quality; Corticosterone; Eye and leg health; Lighting. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300202 |
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| Lima,Karla A. O.; Nääs,Irenilza de A.; Garcia,Rodrigo G.; Borille,Rodrigo; Caldara,Fabiana R.. |
| Broiler production is highly dependent on the use of artificial light. The light source may affect the effectiveness of housing conditions due to increasing ambient temperature and concentration of noxious gases. This research aimed to evaluate the effects of different bulb types on the thermal, aerial, and acoustic environment of broiler aviaries. The experiment was carried out at a commercial broiler farm in Dourados, Mato Grosso do Sul State, Brazil. Three aviaries were used, and two flocks of male broilers from Cobb® genetic strain were reared from the first day to slaughter. Each aviary was equipped with a different light source, comprising the adopted treatments (A1 - incandescent light bulb, control; A2 - sodium vapor light bulb; A3 - fluorescent... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poultry industry; Gas concentration; Lighting; Temperature. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300006 |
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| Oliveira,Alexsandro Nunes de; Freitas,Ednardo Rodrigues; Filgueira,Thales Marcel Bezerra; Cruz,Carlos Eduardo Braga; Nascimento,Germano Augusto Jerônimo do. |
| The experiment was conducted to evaluate the effects of limestone particle size and the use of artificial light for laying hens in the second laying cycle. We used 240 Hisex White laying hens at 82 weeks of age in a completely randomized design in a 5 × 2 factorial arrangement, resulting in 10 treatments with 4 replicates of 6 birds. The variables were the five particle sizes obtained by increasing the proportion of thick limestone (0, 25, 50, 75 and 100%) compared with thin limestone and two lighting programs: with and without artificial light. Limestone particle size and light did not affect performance or egg quality. However, there were changes in bird feeding schedule throughout the day as a response to the lighting program. Bone quality, density and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcium; Eggshell; Lighting; Nutrition; Bone strength. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000700004 |
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