Intermittent Lighting
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Influence of artificial lighting on the performance and egg quality of commercial layers: a review
In Brazil, the egg production chain produces fresh eggs for the consumer market and for processing. Layers are housed in battery cage systems. Rearing and development farms are separate from egg-production farms. Considering the recent advance of Brazilian chicken egg production, scientific knowledge on management practices are required to disseminate and to
Rev. Bras. Cienc. Avic.. Publicado em: 2014-12
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2. Curtain color and lighting program in broiler production: I - general performance
The objective of the present study was to evaluate mortality and performance, darkling beetle population (Alphitobius diaperinus), light intensity, electrical energy consumption and economic efficiency of broilers reared under two lighting programs (nearly continuous or intermittent) and two curtain colors (yellow or blue). The experiment was conducted betwe
Revista Brasileira de Zootecnia. Publicado em: 2011-09
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3. Curtain color and lighting program in broiler production: II. carcass and parts yield and abdominal fat deposition
The objective of the present study was to evaluate carcass and parts' yield, abdominal fat deposition and breast and foot pad blisters of broilers reared under two lighting programs (nearly continuous or intermittent) in broilers houses with yellow and blue curtains. The experiment was conducted between June, 2004 and May, 2005. Six flocks were sequentially
Revista Brasileira de Zootecnia. Publicado em: 2011-09
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4. Curtain color and lighting program in broiler production: III - thermal comfort
The objective of this study was to evaluate the thermal comfort of broilers reared under two lighting programs (almost continuous and intermittent) in broiler houses with yellow or blue lateral curtains. The experiment was carried out from June 24, 2004 until May 12, 2005. Six consecutive flocks were housed in four 12 × 10 m broilers houses internally divid
Revista Brasileira de Zootecnia. Publicado em: 2011-09
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5. MEDIÇÃO DO CAMPO INSTANTÂNEO DE VELOCIDADE DO LÍQUIDO NO ESCOAMENTO BIFÁSICO INTERMITENTE EM TUBOS HORIZONTAIS E INCLINADOS / INSTANTANEOUS LIQUID VELOCITY FIELD MEASUREMENTS IN TWO-PHASE INTERMITTENT FLOW THROUGH HORIZONTAL AND INCLINED PIPES
instantaneous liquid velocity fields at the film, nose and tail regions of slugs in horizontal and inclined two phase flow. To this end, a combination of three nonintrusive optical techniques was employed. Two-dimensional particle image velocimetry (PIV) was used to measure the instantaneous liquid velocity field at a meridional plane of the horizontal pipe
Publicado em: 2009
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6. Reproductive characteristics of ligth and semi-heavy roosters submitted to different photoperiods / CaracterÃsticas reprodutivas de galos leves e semi-pesados submetidos a diferentes fotoperÃodos.
With the objective of evaluating the effects of differents photoperiods on the reproductive parameters in roosters of light and semi-heavy strains, an experiment was conducted in the Animal Science Department of the Federal University of Lavras. 24 roosters of the Lohman LSL strain (light) and 24 roosters of the Lohman Brown strain (semi-heavy), aged 19 week
Publicado em: 2006
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7. AvaliaÃÃo de programa de iluminaÃÃo para poedeiras leves e semi-pesadas / Evaluation of lighting program for light and semiheavy layers
To evaluate the effect of lighting programs for light and semi-heavy layers, two experiments at the Department of Animal Science of the Federal University of Lavras were conducted. An intermittent lighting program and another with only natural lighting on days of growing lighting as compared with a continuous program by utilizing 288 light and 192 semi-heavy
Publicado em: 2003
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8. AvaliaÃÃo de programa de iluminaÃÃo em cordonas japonesas (Coturnix japonica) / Evaluating the lighting programs in quails (Coturnix coturnix)
Com o objetivo de avaliar o efeito de programas de iluminaÃÃo contÃnuo e intermitentes sobre a produÃÃo e qualidade de ovos de codornas (Coturnix coturnix) criadas em galpÃo aberto, este trabalho, realizado no Departamento de Zootecnia da Universidade Federal de Lavras â MG, utilizou 720 codornas de 36 semanas de idade, durante 5 perÃodos de 28 dias,
Publicado em: 2003
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9. Influence of Chloroplast Development on the Activation of the Diphenyl Ether Herbicide Acifluorfen-Methyl
The activity of acifluorfen-methyl (AFM); methyl 5-(2-chloro-4-[trifluoromethyl] phenoxy)-2-nitrobenzoate in excised cucumber cotyledons (Cucumis sativus L.) was examined. AFM induced membrane disruption, was significantly greater when etiolated cotyledons were illuminated 16 hours at 150 microeinsteins per square meter per second photosynthetically active r