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| Registros recuperados: 11.818 | |
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| Ocarino,N.M.; Serakides,R.; Nunes,V.A.. |
| The effect of the estrogenic phase in the bone and in the mineral metabolism was studied in Wistar adult female rats kept under euthyroidism or hyperthyroidism for 60 days. The rats were divided, according to the stage of the estrous cycle, into four groups: 1) euthyroid (proestrus-estrus), 2) euthyroid (metaestrus-diestrus), 3) hyperthyroid (proestrus-estrus), and 4) hyperthyroid (metaestrus-diestrus). After 60 days the blood plasma was collected and the concentrations of free T4, estradiol, progesterone, calcium, phosphorus, and of alkaline phosphatase were determined. The bones (femur and tibia) were analysed microscopically. Despite of the functional state of the thyroid, the levels of estrogen were significantly higher in the proestrus-estrus. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rato; Hipertireoidismo; Osso; Ciclo estral. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000400018 |
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| Fischer,Christina; Malta,José Celso de Oliveira; Varella,Angela Maria Bezerra. |
| Foram examinados brânquias, fossas nasais e intestinos de tambaquis (Colossoma macropomum) capturados em duas localidades na Amazônia, próximas aos municípios de Tefé/Coari, no médio rio Solimões, Estado do Amazonas e de Santarém no baixo rio Amazonas, Estado do Pará. Nove espécies de parasitas foram encontradas: três da classe Monogenoidea; Anacanthorus spathulatus, Linguadactyloides brinkmanni e Notozothecium sp.; uma de Trematoda da família Paramphistomidae; uma do filo Acanthocephala, Neoechinorhynchus buttnerae, duas do filo Nematoda, Spirocamallanus sp. e Procamallanus sp. e duas da subclasse Copepoda, Gamidactylus jaraquensis e Perulernaea gamitanae. Foram registradas pela primeira vez parasitando o tambaqui, o monogenético Notozothecium sp.,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Populações naturais; Parasitas do tambaqui Monogenea Copepoda Nematoda Acanthocephala marcadores biológicos. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672003000400012 |
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| Ferreira,Evane; Barrigossi,José A.F.. |
| A technique for rearing Elasmopalpus lignosellus (Zeller),larvae in laboratory, infesting plants in the field and evaluating treatments was described and tested in rice. In addition, the performance of insecticides as seed treatments to control larvae, under artificial and natural infestations, was evaluated on three planting dates. The experimental design was a Latin 6x6 square and the experimental unit consisted of seven 4 m long rows and 0.4 m spacing between rows. Treatments consisted of the following insecticides and doses: thiamethoxam (52.5, 70, and 105 g a.i./100 kg seeds), furathiocarb (320 g a.i./100kg seeds), carbofuran (525 g a.i./100kg seeds), and an untreated control. Artificial infestations were made, in two groups of three selected tillers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insect; Lesser cornstalk borer insect rearing; Seed dressing. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000200030 |
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| Ferreira, Victor Rodrigues; Souza, Paulo Marcelo de; Ponciano, Niraldo José; Carvalho, Almy Júnior Cordeiro de. |
| O trabalho analisa a importância do cultivo de frutas como alternativa para o aumento de renda da agricultura familiar, no contexto dos financiamentos concedidos pelo PRONAF. Os resultados evidenciaram que o recurso financeiro foi a variável que mais limitou a escolha dos agricultores. Maracujá, goiaba e pinha foram identificadas como as melhores alternativas econômicas para os produtores familiares da região. A análise permitiu concluir que a concessão do crédito, pelo PRONAF, contribui para a melhor utilização dos recursos, para a obtenção de maior renda, bem como para a geração de empregos. |
| Tipo: Journal paper |
Palavras-chave: Production systems; Fruit and berries. |
| Ano: 2003 |
URL: http://orgprints.org/22669/1/Ferreira_Fruticultura.pdf |
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| Ferreira,Victor Rodrigues; Souza,Paulo Marcelo de; Ponciano,Niraldo José; Carvalho,Almy Júnior Cordeiro de. |
| O trabalho analisa a importância do cultivo de frutas como alternativa para o aumento de renda da agricultura familiar, no contexto dos financiamentos concedidos pelo PRONAF. Os resultados evidenciaram que o recurso financeiro foi a variável que mais limitou a escolha dos agricultores. Maracujá, goiaba e pinha foram identificadas como as melhores alternativas econômicas para os produtores familiares da região. A análise permitiu concluir que a concessão do crédito, pelo PRONAF, contribui para a melhor utilização dos recursos, para a obtenção de maior renda, bem como para a geração de empregos. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultura familiar; Programação linear; PRONAF. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452003000300019 |
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| Streck,Nereu Augusto. |
| Temperature is a major factor that affects metabolic processes in living organisms. Thermal time has been widely used to account for the effects of temperature on crop growth and development. However, the thermal time approach has been criticized because it assumes a linear relationship between the rate of crop growth or development and temperature. The response of the rate of crop growth and development to temperature is nonlinear. The objective of this study was to develop a generalized nonlinear temperature response function for some growth and developmental parameters in kiwifruit (Actinidia deliciosa (A. Chev.) C. F. Liang & A. R. Ferguson). The nonlinear function has three coefficients (the cardinal temperatures), which were 0ºC, 25ºC, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Temperature; Model; Growth; Development; Kiwifruit. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782003000200012 |
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| Ralston, Katherine L.; Buzby, Jean C.; Guthrie, Joanne F.. |
| A "healthy school meal environment" not only gives students opportunities to make healthy meal choices but also encourages them to do so. The extent to which a healthy school meal environment affects the success of USDA's school meals programs is currently a subject of debate. The policy strategies that can be used to encourage such an environment for the National School Lunch Program (NSLP) and the School Breakfast Program (SBP)also are subjects of debate. Environmental factors considered to be important include: (1) the nutritional quality, variety, and acceptability of program meals; (2) meal scheduling; (3) nutrition education; and (4) sales of non-USDA ("competitive") foods. Other factors contributing to an overall healthy nutrition environment in... |
| Tipo: Report |
Palavras-chave: Food Consumption/Nutrition/Food Safety. |
| Ano: 2003 |
URL: http://purl.umn.edu/33845 |
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| Dalton, Timothy J.. |
| New crop varieties often have been promoted in developing countries based upon superior yield vis-a-vis locally available varieties. This research presents a hedonic model for upland rice by drawing upon the input characteristics and consumer good characteristics model literature. Model specification tests determine that a combination of production and consumption characteristics best explains the willingness to pay for new upland rice varieties. This non-separable household model specification determined that four traits explain the willingness to pay for new rice varieties: plant cycle length, plant height, grain elongation/swelling and tenderness. Yield was not significant explanatory variable for the willingness to pay for seed. The implications... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Hedonic; Upland rice; West Africa; Household modelling; Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/25804 |
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| Registros recuperados: 11.818 | |
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