5,823 research outputs found
Tratamentos para Promover a Germinação de Sementes de Carica papaya L. Variedade "Sunrise Solo".
No full textTitulo em inglês: Treatments to Promote Seed Germination of Carica papaya L. ?Sunrise Solo? Variety
Estabelecimento de Protocolo Simplificado para a Germinação in vitro de Sementes de Citrus sinensis L. Osbeck var. Pera.
No full textProcedimento simplificado para introdução e multiplicação in vitro de Lantana camara L., uma espécie nativa de uso ornamental e medicinal.
No full text
Estudo do potencial de remoção do cobre pela Pistia Stratiotes L. em efluente sintético da indústria de papel e celulose
No full textThe pulp production sector is important for the base of the national economy, given the great availability of forest resources in the country. However, these companies generate a large volume of effluent. The presence of metal ions from chemical reagents, wood, wood bark, chips and lime and the toxicity to water courses caused by effluents from the pulp industry, become a concern and, therefore, the development of treatment techniques for effluents from this industry. The present study aimed to evaluate the tolerance of the aquatic macrophyte species Pistia stratiotes L. in synthetic effluent contaminated with copper. Aquatic macrophyte are an alternative in the treatment of effluents and have been shown to be a good option for the phytoremediation of chemical elements contained in domestic and industrial effluents. Phytoremediation is a technique of easy access and application, widely used in contaminated environments. Aquatic macrophytes Pistia stratiotes L. were collected from a fish tank located in the municipality of Monte Carmelo – MG and transported to a greenhouse located on Campus Araras - Monte Carmelo belonging to the Institute of Agricultural Sciences of the Federal University from Uberlândia. The synthetic effluent was prepared to simulate an effluent generated in the pulp and paper industry containing the copper metal in increasing concentrations. The experiment was performed in triplicate and the contact time evaluated was 14 days. The aquatic macrophyte was shown to be tolerant to copper with an initial average concentration of 2.68 mg L-1, removing the metal from the synthetic effluent, while for an initial average concentration of 10.29 mg L-1 it was more sensitive in terms of tolerance, but did the removal of approximately 97.22% of the metal in the synthetic effluent.Trabalho de Conclusão de Curso (Graduação)O setor de produção de celulose é importante para a base da economia nacional, visto a grande disponibilidade de recursos florestais no país. Porém, essas empresas geram um grande volume de efluente. A presença de íons metálicos provenientes de reagentes químicos, madeira, casca da madeira, cavacos e cal e a toxicidade aos cursos d’água causada pelos efluentes da indústria de celulose, tornam-se uma preocupação e, portanto, busca-se o desenvolvimento de técnicas de tratamento para efluentes dessa indústria. O presente estudo teve como objetivo avaliar a tolerância da espécie de macrófita aquática Pistia stratiotes L. em efluente sintético contaminado com cobre. As macrófitas aquáticas apresentam-se como alternativa no tratamento de efluentes e têm se mostrado uma boa opção para a fitorremediação de elementos químicos contidos em efluentes domésticos e industriais. A fitorremediação é uma técnica de fácil acesso e aplicação, muito utilizada em ambientes contaminados. Foram coletadas macrófitas aquáticas Pistia stratiotes L. (alface d’água) de um tanque de peixes localizado no município de Monte Carmelo – MG e transportadas para uma casa de vegetação localizada no Campus Araras – Monte Carmelo pertencente ao Instituto de Ciências Agrárias da Universidade Federal de Uberlândia. O efluente sintético foi preparado para simular um efluente gerado na indústria de papel e celulose contendo o metal cobre em concentrações crescentes. O experimento foi realizado em triplicata e o tempo de contato avaliado foi de 14 dias. A macrófita aquática se mostrou tolerante ao cobre com concentração inicial média de 2,68 mg/L, removendo o metal do efluente sintético, enquanto que para concentração inicial média de 10,29 mg/L se mostrou mais sensível quanto a tolerância, mas fez a remoção de aproximadamente 97,22% do metal no efluente sintético
Dissociative double photoionization of benzene molecules in the 26-33 eV energy range
No full textA time-of-flight mass spectrometer has been used to study the dissociative double ionization
of benzene by UV synchrotron radiation. The threshold energy for the main dissociative
processes, leading to CH3
+ + C5H3
+, C2H3
+ + C4H3
+ and C2H2
+ + C4H4
+ ion pairs have been
characterized by exploiting a photoelectron-photoion-photoion-coincidence technique, giving
27.8 ± 0.1, 29.5 ± 0.1, and 30.2 ± 0.1 eV, respectively. Theoretical calculations of the energy and
structure of dissociation product ions have been also performed to provide further information
about the dynamics of these processes
Best linear unbiased prediction for genetic evaluation in reciprocal recurrent selection with popcorn populations.
No full textThe objective of the present study was to present the theory and application of best linear unbiased prediction (BLUP) in reciprocal recurrent selection (RRS). Seven progeny tests from two RRS programmes with popcorn (Zea mays L. ssp. mays [syn. Zea mays L. ssp. everta (Sturtev.) Zhuk.]) populations were conducted and analysed for expansion volume and grain yield. The interpopulation half- and full-sib family models were fitted using ASReml software. Half-sib selection is equivalent to selection for the general combining ability (GCA) of the common parents. With inbred full-sib progeny and BLUP analysis, it is possible to predict the general and specific combining ability effects. The standard error of prediction of the progeny effect was lower than the standard deviation of the best linear unbiased estimation (BLUE) estimate. For half- and full-sib RRS, the BLUE and BLUP provided highly correlated estimates of progeny genotypic values. The coincidence between selected parents ranged from 64 to 95%. With inbred full-sib progeny, the correlations between the BLUE of progeny genotypic values and the BLUP of GCA effects were lower. Consequently, the coincidence between selected parents was lower, ranging from 0 to 57%. The percentage of common selected inbred progeny based on the BLUE and BLUP of the progeny genotypic value ranged from 57 to 100%
Cardiac abnormalities in dogs with visceral leishmaniasis
No full textABSTRACT. Soares N.P., Medeiros A.A., Mundim A.V., Magalhães G.M., Souza M.V.C. & Viadanna P.H.O. [Cardiac abnormalities in dogs with visceral leishmaniasis.] Alterações cardíacas em cães com leishmaniose visceral. Revista Brasileira de Medicina Veterinária, 37(4):339-344, 2015. Laboratório de Patologia Animal, Hospital Veterinário, Faculdade de Medicina Veterinária, Universidade Federal de Uberlândia, Av. Ceará, s/n, Bloco 2T, Campus Umuarama, Uberlândia, MG 38400-902, Brasil. E-mail: [email protected] Canine visceral leishmaniasis (CVL) is a chronic disease, endemic and multisystemic, plus a zoonosis. The infected dog may develop various symptoms affecting multiple systems, including the cardiovascular system. For this reason, we used 43 animals positive for leishmaniasis in order to identify the macro and microscopic alterations of the myocardium and relate them to the levels of the enzyme creatine kinase (CK) and Total CK-MB isoenzyme in serum. On macroscopic examination revealed a dilation of the cardiac chambers, thickening of the muscles of the left ventricle with narrowed lumen and thinning of the right ventricular wall with increased chamber. Histologically, the most frequent findings were coagulation necrosis, myofibrillar degeneration and myocarditis. The CK values ranged from 20 to 1236.4 U / L with an average of 263.31 U / L for CK-MB while the average was 937.34 U / L, ranging from 234.94 U / L to 5477, 83U / L, both above the levels established for the canine species. The CK analyzed together with CK-MB isoenzyme are sensitive indicators for muscle injury in humans and domestic animals. Thus, in seropositive dogs, Leishmania causes nonsuppurative linfoplasmocitic myocarditis, myocardial necrosis, accompanied by an increase in the CK and CK-MB
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