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| Registros recuperados: 54 | |
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| MAIA, A. P. de; OLIVEIRA, S. R. de M.; MOURA, D. J. de; SARUBBI, J.; VERCELLINO, R. do A.; MEDEIROS, B. B. L.; GRISKA, P. R.. |
| ABSTRACT: Thermal comfort is of great importance in preserving body temperature homeostasis during thermal stress conditions. Although the thermal comfort of horses has been widely studied, there is no report of its relationship with surface temperature (TS). This study aimed to assess the potential of data mining techniques as a tool to associate surface temperature with thermal comfort of horses. TS was obtained using infrared thermography image processing. Physiological and environmental variables were used to defi ne the predicted class, which classifi ed thermal comfort as ?comfort? and ?discomfort?. The variables of armpit, croup, breast and groin TS of horses and the predicted classes were then subjected to a machine learning process. All variables... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Mineração de dados; Conforto térmico de cavalos; Termorregulação; Termografia; Surface temperature; Thermoregulation. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/978404 |
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| Maia,Ana Paula de Assis; Oliveira,Stanley Robson de Medeiros; Moura,Daniella Jorge de; Sarubbi,Juliana; Vercellino,Rimena do Amaral; Medeiros,Brenda Batista Lemos; Griska,Paulo Roberto. |
| Thermal comfort is of great importance in preserving body temperature homeostasis during thermal stress conditions. Although the thermal comfort of horses has been widely studied, there is no report of its relationship with surface temperature (T S). This study aimed to assess the potential of data mining techniques as a tool to associate surface temperature with thermal comfort of horses. T S was obtained using infrared thermography image processing. Physiological and environmental variables were used to define the predicted class, which classified thermal comfort as "comfort" and "discomfort". The variables of armpit, croup, breast and groin T S of horses and the predicted classes were then subjected to a machine learning process. All variables in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feature selection methods; Data mining; Surface temperature; Infrared thermography; Thermoregulation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600001 |
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| Rocha, Ronne-von Ribeiro da; Universidade Federal do Piauí; Oliveira, Petrônio Batista de; Universidade Federal do Piauí; Nunes, Amaury Guimarães; Universidade Federal do Piauí; Silva, Tairon Pannunzio Dias e; Universidade de São Paulo; Pereira, Alécio Matos; Universidade Federal do Piauí; Torreão, Jacira Neves da Costa; Colégio Técnico de Bom Jesus. |
| Current analysis evaluated adaptive parameters and thermal comfort of postpartum ewes fed on concentrate supplementation in grazing system. Thirty lactating pluriparous sheep, 16 Santa Inês (SI) and 14 Morada Nova (MN) were used. Physiological parameters such as respiratory rate (RR), heart rate (HR) and rectal temperature (RT) were measured, in that order, with the animals at rest in the morning (6:00-7:00 am) and in the afternoon (1:00-2:00 pm), respectively, every seven days, with 10 samples. A significant effect (p < 0.05) for RR and HR was reported in the strain. Similar behavior was reported for RR between the breeds where MN sheep had high adaptability. Supplementation levels of 0.5 and 1.5% influenced (p < 0.05) RR which was stronger... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental factors; Heat stress; Nutrition; Thermoregulation. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22823 |
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| Kunstetter,A.C.; Wanner,S.P.; Madeira,L.G.; Wilke,C.F.; Rodrigues,L.O.C.; Lima,N.R.V.. |
| There is evidence that brain temperature (Tbrain) provides a more sensitive index than other core body temperatures in determining physical performance. However, no study has addressed whether the association between performance and increases in Tbrain in a temperate environment is dependent upon exercise intensity, and this was the primary aim of the present study. Adult male Wistar rats were subjected to constant exercise at three different speeds (18, 21, and 24 m/min) until the onset of volitional fatigue. Tbrain was continuously measured by a thermistor inserted through a brain guide cannula. Exercise induced a speed-dependent increase in Tbrain, with the fastest speed associated with a higher rate of Tbrain increase. Rats subjected to constant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brain cortex; Fatigue; Hyperthermia; Speed; Thermoregulation; Treadmill running.. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000800679 |
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| SILVA, C. A. D. da. |
| O objetivo deste trabalho foi estudar a biologia e as exigências térmicas de Tetranychus ludeni Zacher (Acari: Tetranychidae) em folhas de algodoeiro (Gossypium hirsutum L. r. latifolium (Hutch)). Foram utilizadas câmaras climatizadas, ajustadas nas temperaturas de 20, 23, 25, 28 e 30oC, umidade relativa de 70% e fotófase de 12 horas. Os períodos de desenvolvimento de ovo a adulto variaram de 20,77 (20oC) a 8,50 dias (30oC), em fêmeas, e de 18,83 (20oC) a 7,75 dias (30oC), em machos. As temperaturas-base, estimadas pelo método da intersecção de X, para os períodos de desenvolvimento de ovo-adulto, foram de 14,05oC para fêmeas e 13,91oC para machos, enquanto os valores da constante térmica estimados de acordo com a lei de Réamur foram de 138,34 graus-dia,... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Termorregulação; Temperatura; Gossypium hirsutum; Thermoregulation; Temperature. |
| Ano: 2002 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/107301 |
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| Vimieiro-Gomes,A.C.; Magalhães,F.C.; Amorim,F.T.; Machado-Moreira,C.A.; Rosa,M.S.; Lima,N.R.V.; Rodrigues,L.O.C.. |
| Centrally stimulated sweat rate produced by graded exercise until exhaustion was compared to the local sweat rate induced by pilocarpine, often used as a sweating index for healthy individuals. Nine young male volunteers (22 ± 4 years) were studied in temperate environment in two situations: at rest and during progressive exercise with 25 W increases every 2 min until exhaustion, on a cycle ergometer. In both situations, sweating was induced on the right forearm with 5 ml 0.5% pilocarpine hydrochloride applied by iontophoresis (1.5 mA, 5 min), with left forearm used as control. Local sweat rate was measured for 15 min at rest. During exercise, whole-body sweat rate was calculated from the body weight variation. Local sweat rate was measured from the time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sweat rate; Graded exercise test; Pilocarpine; Thermoregulation. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700017 |
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| BOMFIM, J. M.; MARTINS, T. P.; PINHEIRO, R. R.; FAÇANHA, D. A. E.; SILVEIRA, R. M. F.; OLIVEIRA, M. C. de; SOUZA, V. de; VASCONCELOS, A. M. de.. |
| Resumo: Objetivou-se, avaliar o comportamento termorregulador de cabras Saanen suplementadas com selênio orgânico na dieta e criadas em ambiente tropical. Foram utilizadas 12 cabras, não prenhes e clinicamente saudáveis; criadas de forma semiextensiva, pela manhã ficavam em pasto nativo e à tarde retornavam para o galpão, permanecendo em baias individuais e recebia concentrado à base de milho e farelo de soja, 250g/animal. Durante 21 dias foram suplementadas com selênio orgânico oferecido na forma de levedura, adicionado ao concentrado de acordo com as recomendações da empresa fornecedora. Foram realizadas aferições a Temperatura Retal, Frequência Respiratória, Temperatura Superficial da pele, nos turnos da manhã e tarde. Os dados meteorológicos foram... |
| Tipo: Artigo em anais de congresso (ALICE) |
Palavras-chave: Raça Saanen; Semiárido; Brasil; Nordeste; Caprino; Cabra leiteira; Termorregulação; Nutrição animal; Suplemento alimentar; Suplemento mineral; Microelemento; Selênio; Antioxidade; Goats; Thermoregulation; Supplementary feeding; Mineral supplements; Trace elements; Selenium; Antioxidants; Semiarid zones; Brazil. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/1059793 |
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| Bovo,Rafael P.; Marques,Otavio A. V.; Andrade,Denis V.. |
| Temperature affects physiological performance in reptiles and, therefore, body temperature (Tb) control is argued to have an important adaptive value. Alterations in Tb due to transient changes in physiological state, as during digestion or gestation, are often linked to the potential benefits of a more precise Tb regulation. However, such thermoregulatory responses in nature remain controversial, particularly for tropical snakes. Herein, we measured Tb of the golden lanceheads, Bothrops insularis (Amaral, 1921), at Queimada Grande Island, southeastern Brazil, to test for alteration in selected body temperatures associated with feeding or gestation. We found no evidence that postprandial or gravid snakes selected for higher Tb indicating that, under... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestion; Gravid females; Postprandial thermophilic response; Snake; Thermoregulation; Neotropics. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600020 |
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| Silva, Tairon Pannunzio Dias e; Marques, Carlo Aldrovandi Torreão; Torreão, Jacira Neves da Costa; Bezerra, Leílson Rocha; Araujo, Marcos Jácome de; Lima, Lucas Almeida. |
| This study was realized to evaluate the effect of concentrate supplementation and time scales of evaluation on behavioral and physiological responses of pregnant ewes on grazing system. The experimental design was a randomized 2 x 2 x 3 factorial arrangement (two breeds: Morada and Santa Inês; two concentrate supplementation levels: 0.5 and 1.5% of body weight; and three time scales of evaluation: 10, 20 and 30 minutes) with six replicates per treatment. The physiological parameters were influenced by period of the day and breeds, with higher values in the afternoon to Santa Inês ewes. Also, influence of concentrate supplementation was found between the breeds with greater values in Santa Inês ewes. But, it did not alter the physiological parameters among... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal nutrition; Behavior; Native ewes; Semi-arid conditions; Thermoregulation. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/28748 |
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| Fonseca,Patrícia C. de F; Almeida,Eduardo A. de; Passini,Roberta. |
| In Tropical regions, the animal performance is often affected by climate conditions. This study aimed to evaluate covering materials in individual shelters, normally used to house dairy calves, and its influence on the calves physiology and performance. The design used was completely randomized, with a 2x3 factorial arrangement to compare the averages of 5% through the Tukey's test, i.e., both genders- and three types of covering in the shelters (Z - zinc; AC - asbestos cement; and WPAC - white-painted asbestos cement). Parameters evaluated included daily weight gain (DWG), dry matter intake (DMI), feed conversion (FC), rectal temperature (RT), and respiratory frequency (RF). Results showed significant differences (P < 0.05) among males (1.04kg/day) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermoregulation; Weight gain; Feed conversion. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600005 |
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| Rodrigues,L.O.C.; Oliveira,A.; Lima,N.R.V.; Machado-Moreira,C.A.. |
| Thermal environmental stress can anticipate acute fatigue during exercise at a fixed intensity (%VO2max). Controversy exists about whether this anticipation is caused by the absolute internal temperature (Tint, ºC), by the heat storage rate (HSR, cal/min) or by both mechanisms. The aim of the present study was to study acute fatigue (total exercise time, TET) during thermal stress by determining Tint and HSR from abdominal temperature. Thermal environmental stress was controlled in an environmental chamber and determined as wet bulb globe temperature (ºC), with three environmental temperatures being studied: cold (18ºC), thermoneutral (23.1ºC) or hot (29.4ºC). Six untrained male Wistar rats weighing 260-360 g were used. The animals were submitted to... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Thermoregulation; Exercise; Fatigue; Heat storage rate. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000100018 |
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| Registros recuperados: 54 | |
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