Aplicação da análise multiobjetiva em apoio à decisão no manejo holístico de pastagens no Pantanal.

Grande parte da planície pantaneira é constituída de propriedades voltadas para a criação extensiva de gado de corte em pastagens nativas e exóticas

Biomassa de capim-piatã e feijão-guandu consorciados em um sistema integrado com árvores nativas.

Os sistemas de Integração Lavoura-Pecuária-Floresta (ILPF) são métodos de produção sustentável que integram árvores, pastagens e culturas agrícolas

Análise comportamental de bovinos em sistema agroflorestal usando Power BI.

O setor de tecnologias é um dos que mais crescem no mundo, o que requer investimentos em digitalização e automatização

Implantação de experimento para avaliar o efeito do sombreamento artificial nas características de desempenho, consumo de água e emissão de metano de bovinos em confinamento.

Uma das estratégias para manter constante o fornecimento de carne para os mercados interno e externo é diminuir a idade de abate e aumentar o número de bovinos terminados em confinamento, principalmente na época seca do ano, bem como o aumento da produtividade dos sistemas de produção de carne bovina de forma sustentável sob o ponto de vista ambiental, econômico e social, preocupação global, tanto de produtores como de consumidores. Propor e validar soluções econômicas e socialmente aceitáveis é um grande desafio para esta cadeia

Evaluation of the cytotoxic and genotoxic potential of water from the River Paraíba do Sul, in Brazil, with the Allium cepa L. test

This work investigated the cytotoxic and genotoxic potential of water from the River Paraíba do Sul (Brazil) using Allium cepa roots. An anatomo-morphological parameter (root length), mitotic indices, and frequency of micronuclei were analysed. Eight bulbs were chosen at random for treatment for 24 to 120 hours with the River water collected in the years of 2005 and 2006 from sites in the cities of Tremembé and Aparecida (São Paulo state, Brazil). Daily measurements of the length of the roots grown from each bulb were carried out throughout the experiment. Mitotic index (MI) and frequency of micronuclei (MN) were determined for 2000 cells per root, using 3-5 root tips from other bulbs (7-10). Only in the roots treated with samples of the River water collected in 2005 in Tremembé city was there a decrease in the root length growth compared to the respective control. However, a reduction in MI values was verified for both sites analysed for that year. Considering the data involving root length growth and especially MI values, a cytotoxic potential is suggested for the water of the River Paraíba do Sul at Tremembé and Aparecida, in the year of 2005. On the other hand, since in this year the MN frequency was not affected with the river water treatments, genotoxicity is not assumed for the river water sampled at the aforementioned places

Avaliação do potencial citotóxico e genotóxico da água do Rio Paraíba do Sul através do teste Allium cepa

This work investigated the cytotoxic and genotoxic potential of water from the River Paraíba do Sul (Brazil) using Allium cepa roots. An anatomo-morphological parameter (root length), mitotic indices, and frequency of micronuclei were analysed. Eight bulbs were chosen at random for treatment for 24 to 120 hours with the River water collected in the years of 2005 and 2006 from sites in the cities of Tremembé and Aparecida (São Paulo state, Brazil). Daily measurements of the length of the roots grown from each bulb were carried out throughout the experiment. Mitotic index (MI) and frequency of micronuclei (MN) were determined for 2000 cells per root, using 3-5 root tips from other bulbs (7-10). Only in the roots treated with samples of the River water collected in 2005 in Tremembé city was there a decrease in the root length growth compared to the respective control. However, a reduction in MI values was veri-fied for both sites analysed for that year. Considering the data involving root length growth and especially MI values, a cytotoxic potential is suggested for the water of the River Paraíba do Sul at Tremembé and Aparecida, in the year of 2005. On the other hand, since in this year the MN frequency was not affected with the river water treatments, genotoxicity is not assumed for the river water sampled at the aforementioned places.This work investigated the cytotoxic and genotoxic potential of water from the River Paraíba do Sul (Brazil) using Allium cepa roots. An anatomo-morphological parameter (root length), mitotic indices, and frequency of micronuclei were analysed. Eight bulbs were chosen at random for treatment for 24 to 120 hours with the River water collected in the years of 2005 and 2006 from sites in the cities of Tremembé and Aparecida (São Paulo state, Brazil). Daily measurements of the length of the roots grown from each bulb were carried out throughout the experiment. Mitotic index (MI) and frequency of micronuclei (MN) were determined for 2000 cells per root, using 3-5 root tips from other bulbs (7-10). Only in the roots treated with samples of the River water collected in 2005 in Tremembé city was there a decrease in the root length growth compared to the respective control. However, a reduction in MI values was veri-fied for both sites analysed for that year. Considering the data involving root length growth and especially MI values, a cytotoxic potential is suggested for the water of the River Paraíba do Sul at Tremembé and Aparecida, in the year of 2005. On the other hand, since in this year the MN frequency was not affected with the river water treatments, genotoxicity is not assumed for the river water sampled at the aforementioned places.This work investigated the cytotoxic and genotoxic potential of water from the River Paraíba do Sul (Brazil) using Allium cepa roots. An anatomo-morphological parameter (root length), mitotic indices, and frequency of micronuclei were analysed. Eight bulbs were chosen at random for treatment for 24 to 120 hours with the River water collected in the years of 2005 and 2006 from sites in the cities of Tremembé and Aparecida (São Paulo state, Brazil). Daily measurements of the length of the roots grown from each bulb were carried out throughout the experiment. Mitotic index (MI) and frequency of micronuclei (MN) were determined for 2000 cells per root, using 3-5 root tips from other bulbs (7-10). Only in the roots treated with samples of the River water collected in 2005 in Tremembé city was there a decrease in the root length growth compared to the respective control. However, a reduction in MI values was veri-fied for both sites analysed for that year. Considering the data involving root length growth and especially MI values, a cytotoxic potential is suggested for the water of the River Paraíba do Sul at Tremembé and Aparecida, in the year of 2005. On the other hand, since in this year the MN frequency was not affected with the river water treatments, genotoxicity is not assumed for the river water sampled at the aforementioned places.693837842Ateeq, B., Farra, M.A., Ali, M.N., Ahmad, W., Clastogenicity of pentachlorophenol, 2,4-D and butachlor evaluated by Allium root tip test (2002) Mutation Research, 514 (1-2), pp. 105-113Babatunde, B.B., Bakare, A.A., Genotoxicity screening of wastewaters from Agbara industrial estate, Nigeria evaluated with the Allium test (2006) Pollution Research, 25 (2), pp. 227-234Bakare, A.A., Wale-Adeyemo, A.R., The mutagenic and cytotoxic effects of leachates from domestic solid wastes and Aba Eku landfill, Nigeria on Allium cepa (2004) Nature Environment and Pollution Technology, 3 (4), pp. 455-462Cabrera, G.L., Rodriguez, D.M.G., Genotoxicity of leachates from a landfill using three bioassays (1999) Mutation Research, 426 (2), pp. 207-210Cabrera, G.L., Rodriguez, D.M.G., Genotoxicity of soil from farmland irrigated with wastewater using three plant bioassays (1999) Mutation Research, 426 (2), pp. 211-214Cabrera, G.L., Rodriguez, D.M.G., Maruri, A.B., Genotoxicity of the extracts from the compost of the organic and the total municipal garbage using three plant bioassays (1999) Mutation Research, 426 (2), pp. 201-206(2002) Relatório de qualidade das águas interiores do Estado de São Paulo, p. 263. , Companhia de Tecnologia e Saneamento Ambiental - CETESB, São Paulo: CETESB(2005) Resultados dos parâmetros e indicadores de qualidade das águas interiores do Estado de São Paulo, , http://www.cetesb.sp.gov.br/Agua/rios/relatorios.asp, Companhia de Tecnologia e Saneamento Ambiental - CETESB, São Paulo: CETESB. Available from, Access in: 10/01/2007(2006) Resultados dos parâmetros e indicadores de qualidade das águas interiores do Estado de São Paulo, , http://www.cetesb.sp.gov.br/Agua/rios/relatorios.asp, Companhia de Tecnologia e Saneamento Ambiental - CETESB, São Paulo: CETESB. Available from, Access in: 10/01/2007Chandra, S., Chauhan, L.K.S., Murthy, R.C., Saxena, P.N., Pande, P.N., Gupta, S.K., Comparative biomonitoring of leachates from hazardous solid waste of two industries using Allium test (2005) The Science of the Total Environment, 347 (1-3), pp. 46-52(2005) Resolução 357, p. 23. , Conselho Nacional do Meio Ambiente - CONAMA, Brasília: CONAMADash, S., Panda, K.K., Panda, B.B., Biomonitoring of low levels of mercurial derivatives in water and soil by Allium micronucleus assay (1988) Mutation Research, 203 (1), pp. 11-21Egito, L.C.M., Medeiros, M.G., Medeiros, S.R.B., Agnez-Lima, L.F., Cytotoxic and genotoxic potential of surface water from the Pitimbu river, northeastern/RN Brazil (2007) Genetics and Molecular Biology, 30 (2), pp. 435-441Evseeva, T.I., Gerask'in, S.A., Shuktomova, I.I., Genotoxicity and toxicity assay of water sampled from a radium production industry storage cell territory by means of Allium-test (2003) Journal of Environmental Radioactivity, 68 (3), pp. 235-248Fernandes, T.C.C., Mazzeo, D.E.C., Marin-Morales, M.A., Mechanism of micronuclei formation in polyploidizated cells of Allium cepa exposed to trifluralin herbicide (2002) Pesticide Biochemistry and Physiology, 88 (3), pp. 252-259Fisch, G., Distribuição da precipitação em Taubaté, Vale do Paraíba (SP) (1999) Revista Biociências, 5 (2), pp. 7-11Fiskesjö, G., Benzo[a]pyrene and N-methyl-N'-nitro-N- nitrosoguanidine in the Allium test (1981) Hereditas, 95 (1), pp. 155-162Fiskesjö, G., Chlorinated phenoxyacetic acids and chlorophenols in the modified Allium test (1981) Chemico Biological Interactions, 34 (3), pp. 333-334Fiskesjö, G., The Allium test as a standard in environmental monitoring (1985) Hereditas, 102 (1), pp. 99-112Fiskesjö, G., The Allium test - an alternative in environmental studies: The relative toxicity of metal ions (1988) Mutation Research, 197 (2), pp. 243-260Gopalan, H.N., Ecosystem health and human well being: The mission of the international programme on plant bioassays (1999) Mutation Research, 426 (2), pp. 99-102Grant, W.F., Chromosome aberration assays in Allium: A report of the U.S. (1982) Environmental Protection Agency Gene-Tox Program. Mutation Research, 99 (3), pp. 273-291Grant, W.F., Chromosome aberration assays in Crepis for the study of environmental mutagens (1998) Mutation Research, 410 (3), pp. 291-307Grant, W.F., Higher plant assay for the detection of chromosomal aberrations and gene mutations - a brief historical background on their use for screening and monitoring environmental chemicals (1999) Mutation Research, 426 (2), pp. 107-112Grant, W.F., Owens, E.T., Zea mays assays of chemical/radiation genotoxicity for the study of environmental mutagens (2006) Mutation Research, 613 (1), pp. 17-64Grisolia, C.K., Oliveira, A.B.B., Bonfim, H., Genotoxicity evaluation of domestic sewage in a municipal wastewater treatment plant (2005) Genetics and Molecular Biology, 28 (2), pp. 334-338Grover, I.S., Kaur, S., Genotoxicity of wastewater sample from sewage and industrial effluent detected by the Allium root anaphase aberration and micronucleus assays (1999) Mutation Research, 426 (2), pp. 183-188Liu, D., Jiang, W., Li, M., Effects of trivalent and hexavalent chromium on root growth and cell division of Allium cepa (1992) Hereditas, 117 (1), pp. 23-29Ma, T.H., The international program on plant bioassays and the report of the follow-up study after the hands-on workshop in China (1999) Mutation Research, 426 (2), pp. 103-106Majer, B.J., Grummt, T., Uhl, M., Knasmüller, S., Use of plant bioassays for the detection of genotoxins in the aquatic environment (2005) Acta Hydrochimica et Hydrobiologica., 33 (1), pp. 45-55Marcano, L., Carruyo, I., Campo, A.D., Montiel, X., Cytotoxicity and mode of action of maleic hydrazide in root tips of Allium cepa L (2004) Environmental Research, 94 (2), pp. 221-226Matsumoto, S.T., Mantovani, M.S., Malaguti, M.I.A., Dias, A.L., Fonseca, I.C., Marin-Morales, M.A., Genotoxicity and mutagenicity of water contaminated with tannery effluents and comet assay using the fish Oreochromis niloticus and chromosome alterations in onion root-tips (2006) Genetics and Molecular Biology, 29 (1), pp. 148-158Mello, M.L.S., Vidal, B.C., (1980) Práticas de biologia celular., pp. 57-58. , 1 ed. São Paulo: Edgard BlücherFuncampNielsen, M.H., Rank, J., Screening of toxicity and genotoxicity in wastewater by the use of the Allium test (1994) Hereditas, 121 (3), pp. 249-254Odeigah, O., Nurudeen, O., Amund, O.O., Genotoxicity of oil field wastewater in Nigeria (1997) Hereditas, 126 (2), pp. 161-167Palacio, S.M., Espinoza-Quiñones, F.R., Galante, R.M., Zenatti, D.C., Seolatto, A.A., Lorenz, E.K., Zacarkim, C.E., Tabacniks, M.H., Correlation between heavy metal íons (Copper, Zinc, Lead) concentrations and root length of Allium cepa L. in polluted river water (2005) Brazilian Archives of Biology and Technology, 48, pp. 191-196. , specPanda, K.K., Patra, J., Panda, B.B., Induction of sister chromatid exchanges by heavy metal salts in root meristem cells of Allium cepa L (1996) Biologia Plantarum, 38 (4), pp. 555-561Rank, J., Nielsen, M.H., A modified Allium test as a tool in the screening of the genotoxicity of complex mixtures (1993) Hereditas, 118 (1), pp. 49-53Rank, J., Nielsen, M.H., Screening of toxicity and genotoxicity in wastewater by the use of the Allium test (1994) Hereditas, 121 (3), pp. 249-254Rank, J., Nielsen, M.H., Allium cepa anaphase-telophase root tip chromosome aberration assay on N-methyl-N-nitrosourea, maleic hydrazide, sodium azide, and ethyl methanesulfonate (1997) Mutation Research, 390 (1-2), pp. 121-127Rank, J., Nielsen, M.H., Genotoxicity testing of wastewater sludge using the Allium cepa anaphase-telophase chromosome aberration assay (1998) Mutation Research, 418 (2-3), pp. 113-119(2005) Informações da qualidade das águas do estado de São Paulo, , http://www.sabesp.com.br/sabesp/filesmng.nsf/D4E25A3C5E1ACBE683257209006 DDE3B/$File/relatorio_qualidade.pdf, Companhia de Saneamento Básico do estado de São Paulo-SABESP, Available from, Access in: 17/01/2007(2006) Informações da qualidade das águas do estado de São Paulo, , http://www.sabesp.com.br/sabesp/filesmng.nsf/52BB882D899FBD3883257251004 ABB84/$File/rel_ago06.pdf, Companhia de Saneamento Básico do estado de São Paulo-SABESP, Available from, Access in: 17/01/2007Staykova, T.A., Ivanova, E.N., Velcheva, I.G., Cytogenetic effect of heavy-metal and cyanide in contaminated waters from the region of southwest Bulgaria (2005) Journal of Cell and Molecular Biology, 4 (1), pp. 41-46Este trabalho é parte de uma investigação sobre o potencial citotóxico e genotóxico da água do Rio Paraíba do Sul (Brasil) utilizando raízes de Allium cepa. Foi analisado um parâmetro anátomo-morfológico (crescimento das raízes), bem como o índice mitótico e a frequência de micronúcleos. Aleatoriamente oito bulbos foram submetidos aos tratamentos de 24 a 120 horas com água do Rio proveniente dos pontos de coleta das cidades de Tremembé e Aparecida nos anos de 2005 e 2006. O comprimento das raízes de cada bulbo foi acompanhado diariamente ao longo do experimento. O índice mitótico (IM) e a frequência de micronúcleos (MN) foram determinados pela análise de 2.000 células por raiz, sendo utilizadas 3-5 raízes de outros bulbos (7-10). Somente as raízes tratadas com amostras de água coletadas em 2005 na cidade de Tremembé, apresentaram decréscimo no comprimento das raízes quando comparadas com o controle. Entretanto, foi observada redução do IM nas raízes tratadas com água de ambos os pontos de coleta no mesmo ano. Considerando os dados de crescimento de raiz e especialmente IM, um potencial citotóxico é sugerido para a água do Rio Paraíba do Sul em Tremembé e Aparecida, no ano de 2005. Por outro lado, para este mesmo ano, a frequência de micronúcleos não foi alterada; assim, a genotoxicidade não foi assumida para a água do Rio nos pontos mencionados.Este trabalho é parte de uma investigação sobre o potencial citotóxico e genotóxico da água do Rio Paraíba do Sul (Brasil) utilizando raízes de Allium cepa. Foi analisado um parâmetro anátomo-morfológico (crescimento das raízes), bem como o índice mitótico e a frequência de micronúcleos. Aleatoriamente oito bulbos foram submetidos aos tratamentos de 24 a 120 horas com água do Rio proveniente dos pontos de coleta das cidades de Tremembé e Aparecida nos anos de 2005 e 2006. O comprimento das raízes de cada bulbo foi acompanhado diariamente ao longo do experimento. O índice mitótico (IM) e a frequência de micronúcleos (MN) foram determinados pela análise de 2.000 células por raiz, sendo utilizadas 3-5 raízes de outros bulbos (7-10). Somente as raízes tratadas com amostras de água coletadas em 2005 na cidade de Tremembé, apresentaram decréscimo no comprimento das raízes quando comparadas com o controle. Entretanto, foi observada redução do IM nas raízes tratadas com água de ambos os pontos de coleta no mesmo ano. Considerando os dados de crescimento de raiz e especialmente IM, um potencial citotóxico é sugerido para a água do Rio Paraíba do Sul em Tremembé e Aparecida, no ano de 2005. Por outro lado, para este mesmo ano, a frequência de micronúcleos não foi alterada; assim, a genotoxicidade não foi assumida para a água do Rio nos pontos mencionados

Green Teeth Related to Bilirubin Levels

Objective: To describe a form of tooth pigmentation caused by serum bilirubin deposition during dental calcification in a premature child. The bilirubin levels during the three months after birth are presented. In this period the crowns of the primary teeth are still forming. Such anomaly does not have symptoms, but has a displeasing effect and great anxiety within the family. Case report: The case reported here highlights the relevance of past medical history, especially the diagnoses of prolonged conjugated hyperbilirubinemia, in this case, to confirm them and to comfort the family. In this case, no esthetic treatment had been undertaken because the child was still too young and not yet concerned. The dental treatment plan included regular checkups every 3 months for maintaining oral health to prevent caries. Conclusion: As this is a rare condition that affects the teeth, parents will most likely look for a dentist for treatment. Therefore, dentists must be aware or such abnormalities and take a multidisciplinary approach, thus making it possible to establish a final diagnosis

Fluosilicato de zinco na prevenção de cárie dental em ratos

O propósito desta pesquisa foi verificar uma possível ação sinérgica entre flúor e zinco na incidência da cárie dental. O estudo compreendeu três grupos de ratos que receberam soluções de: a) fluoreto de sódio (1 ppm) ; b) fluosilicato de zinco; c) e água, respectivamente. Todos os grupos, com ratos machos e fêmeas, eram divididos em subgrupos de acôrdo com a dieta - cariogênica e não cariogênica. Os dados obtidos foram submetidos à análise de variância, concluíndo-se o seguinte: I) O grupo que recebeu fluosilicato de zinco apresentou menor número de cáries do que o do fluoreto de sódio, mas a diferença não foi estatìsticamente significante, sendo, porém, significante entre êstes dois grupos e o da água. II) Os ratos que receberam o fluosilicato de zinco ou o fluoreto de sódio, mostraram nível mais elevado de flúor nas cinzas dos ossos, mas a diferença entre os dois grupos não foi estatìsticamente significante, III) Notou-se também que apresentavam similar desmineralização óssea.<br>The purpose of this research performed in rats (Rattus norwegicus) was to observe if there is a synergic action of fluorine and zinc in order to obtain a greater reduction in dental caries. The study incolved three groups of rats receiving: a) zinc silicofluoride - 1 ppm, b) sodium fluoride - 1 ppm and c) tap water. All groups included males and females, and were divided in sub-groups in accordance with cariogenic and non cariogenic diets. The data were treated by analysis of variance and the main conclusions obtained were the following: 1st) The group of zinc silicofluoride has shown less caries than the sodium fluoride group, but the difference was not statistically significant. When both groups a and b were compared to group c, the results were significant. 2nd) The rats receiving zinc silicofluoride or sodium fluoride have shown higher levels of fluorine in the bone ashes but the difference between them was not statistically significant. 3rd) The rats of both groups - zinc silicofluoride and sodium fluoride - have shown bone demineralizantion at equal level