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Considered as an acting feature, presence is generally approached from the actor’s perspective. Disrupting this conception, this work intends to grasp presence as a relational, not a personal quality. For this purpose, two performances will be analyzed: Heiner Goebbels’s Stifters Dinge and Claude Régy’s Variations on death. Created as landscapes, both performances develop a non-anthropocentric aesthetics of the scene and allow envision presence as a perception phenomenon and from the point of view of the audience activity., Considérée comme une propriété de celui qui joue, la présence est généralement abordée du point de vue du travail de l’acteur. En rupture avec cette conception, l’article cherche à penser la présence comme une qualité relationnelle, et pas personnelle. Pour cela, deux spectacles seront analisés: Stifters Dinge de Heiner Goebbels et Variations sur la mort de Claude Régy. Composés comme des paysages, l’un et l’autre développent une esthétique non anthropocentrique de la scène et aident à penser la présence comme un phénomène de la perception et par le prisme de l’activité du spectateur., Por ser considerada como uma propriedade daquele que atua, a presença costuma ser abordada do ponto de vista do trabalho do ator. Rompendo com essa concepção, o artigo pretende compreender a presença como uma qualidade relacional, e não pessoal. Para tanto, serão analisados dois espetáculos: Stifters Dinge, de Heiner Goebbels, e Variações sobre a morte, de Claude Régy. Compostos como paisagens, ambos desenvolvem uma estética não antropocêntrica da cena e permitem pensar a presença como um fenômeno da percepção e pelo prisma da atividade do espectador.

Resumo: Religião e psicologia não têm fronteiras rígidas e demarcadas no universo das tradições indígenas. Elas, em conjunto, sustentam a subjetividade e dão o sentido à existência. Se, a história das Américas primeiro apresentou a figura indígena como um outro inferior e inclusive despido de características humanas, temos reflexões que demonstram o contrário. Com os limites e a falência do sistema lógico-racional eurocêntrico, são eles os que tem a ensinar. O presente artigo investiga o pensamento decolonial de autores como Walter Mignolo e Aníbal Quijano e antropologia de Eduardo Viveiros de Castro para ofertar a visão de mundo dos povos originários e como ela é capaz de apontar para uma vida mais rica de sentido, conectada com a natureza, alegre, esperançosa e no limite, trazer a compreensão de que qualquer ato da vida cotidiana é também sagrado.Palavras-chave: Religião. Psicologia. Ameríndia. Antropologia. Pensamento decolonial.

Neste estudo foi aplicada uma metodologia para estimar o crescimento e a produção por segmentos pré-estabelecidos da distribuição de diâmetro (percentis). Estes segmentos compreenderam os percentis 35º, 50º, 75º e 93º. Foram empregados dados de parcelas permanentes de teca de um povoamento situado em Alta Floresta – MT. Para prognosticar a produção em função do diâmetro, correlacionou-se cada percentil com características do povoamento. Os modelos ajustados foram avaliados com base no coeficiente de determinação, no erro padrão residual, na análise gráfica dos resíduos e no teste L&O. A metodologia empregada permitiu a obtenção da produção de teca de forma segmentada, com obtenção do volume entre os diâmetros percentis definidos.

Emulsifying properties of oil in water emulsions using chicken egg white and dried egg white as an emulsifying agent were investigated using the conductivity technique. Changes in emulsion conductivity were recorded during and after homogenization and interpreted in terms of properties related to the emulsifying activity (EA) and emulsion stability (ES). The effect of NaCl concentration (0.0, 0.1, 0.5 and 1.0 % w/w), chicken egg white and dried egg white concentration (1.0, 2.5 and 5.0 % w/w) was studied using two vegetable oils, namely corn and canola. In general, it was observed that the EA and ES increase with increasing protein content and salt concentration, in a manner consistent with past research.

Utilizando o modelo de análise e avaliação da argumentação prática no discurso político de Fairclough e Fairclough (2012), este trabalho analisa a argumentação na audiência pública conjunta das Comissões de Finanças e Tributação (CFT), de Fiscalização Financeira e Controle (CFFC) e Mista de Planos, Orçamentos Público e Fiscalização (CMO), ocorrida em 14 julho de 2015, com a presença do Advogado-Geral da União, cuja pauta foram as “pedaladas fiscais” nas contas de 2014 do Governo Federal, que resultaram no impeachment da presidente Dilma Rousseff. Considerando a polêmica em torno das contas, os depoimentos dos agentes políticos foram analisados com base no modelo da argumentação prática, confrontando os argumentos dos que discordam e dos que concordam com os indícios irregularidades. A partir da análise, concluímos que o processo argumentativo se desenvolveu em torno dos aspectos técnicos e políticos envolvendo a prestação de contas de 2014 e foi motivado por posicionamentos prévios dos agentes políticos. Esses posicionamentos estavam vinculados as suas filiações partidárias e relações com o Governo, e seus valores e objetivos foram utilizados com o intuito de levar a audiência a aceitar tais posicionamentos. Palavras-chave: Pedaladas Fiscais. Argumentação Prática. Discurso Político. ABSTRACT Using Fairclough and Fairclough`s (2012) model of analysis and evaluation of practical argumentation in political discourse, this paper analyzes the arguments in the joint public hearing of the Finance and Taxation, Financial Supervisory and Control and Joint Planning, Public Budgets and Supervisory Committees, held on July 14, 2015, attended by the Attorney General of the Union, about "pedaladas fiscais" in the 2014 Federal Government accounts, which resulted in the impeachment of President Dilma Rousseff. Considering the controversy surrounding the accounts, the statements of the political agents were analyzed based on the model of practical argument confronting the arguments of those who disagree and those who agree with the signs irregularities. From the analysis we conclude that the argumentative process developed around the technical and political aspects involving the 2014 accounts and was motivated by previous positions of the political agents. These positions were linked to their political party affiliations and relations with the Government, and their values and objectives were used in order to lead the audience to accept such positions. Keywords: Pedaladas Fiscais. Practical Argumentation. Political Discourse.

Objetivou-se estimar os fatores envolvidos na permanência hospitalar prolongada de pacientes admitidos em caráter de urgência e emergência. Coorte prospectiva, com 125 pacientes admitidos na urgência e emergência de um hospital em Minas Gerais. A coleta dos dados foi feita nos prontuários eletrônicos, em 2014. Os pacientes foram selecionados e acompanhados por 60 dias até a ocorrência dos desfechos “alta” ou “óbito”. Os pacientes foram divididos em curta e longa permanência hospitalar. Como longa permanência, consideraram-se aqueles pacientes que ultrapassaram 4 dias de internação. Odds Ratio (OR) e seus respectivos Intervalos de Confiança de 95% (IC95%) foram ajustados pela regressão logística. Testaram-se diferenças entre média pelo teste qui-quadrado. A média de dias de permanência foi 8,1 (DP=8,9), sendo que a incidência de longa permanência foi de 56,8%. Mantiveram-se independentemente associadas à longa permanência: presença de comorbidades (OR=3,4; IC95% 1,3–9,0); diagnósticos no decorrer da internação (OR=8,8; IC95% 2,0 – 40,0); uso de dispositivos invasivos (OR=3,1; IC95% 1,2–8,5); sepse (OR=7,0; IC95% 1,5–31,1); permanecer mais dias internados no pronto socorro; permanecer mais tempo com dispositivos invasivo; fazer uso de antibióticos por mais dias; submeter a mais procedimentos; estar nas faixas etárias de 0 a 20 ano e acima de 41 anos; apresentar infecções relacionadas à assistência à saúde. Estas informações evidenciam que algumas variáveis são passíveis de serem monitoras e modificáveis. Assim, rastrear os fatores associados à longa permanência poderá servir para indicar inconformidades aos gestores e profissionais, de modo que sejam delimitados planos de melhorias da assistência prestada.

This essay reflects on the architectural and urban heritage management in São João Del Rei, MG – Brazil, from the practices undertaken by the Municipal Council of Cultural Heritage Preservation, considering its effective operation in the municipal scope. Initially, we will present a conceptual-theoretical reflection on the conditions for urban interventions in contexts with significant cultural heritage, followed by equity policy developments in Brazil. Later, we will give emphasis to the case study of São João Del Rei., Este artigo busca refletir sobre a gestão do patrimônio arquitetônico e urbano em São João Del Rei, MG – Brasil, a partir das práticas empreendidas pelo Conselho Municipal de Preservação do Patrimônio Cultural (CMPPC), considerando a sua efetiva atuação no âmbito municipal. Inicialmente será apresentada uma reflexão teórico-conceitual sobre os condicionantes para intervenções urbanas em contextos com significativo patrimônio cultural, seguida da evolução da política patrimonial no Brasil. Posteriormente será dada ênfase ao estudo de caso de São João Del Rei., DISEGNARECON; Vol. 5, Numero Speciale (2012) - DOCO 2012, a cura di R. Mingucci, C. Bartolomei, L. Bravo, S. Garagnani; 95-102

A produção de cristais é uma área de grande interesse dentro das ciências dos materiais devido a grande representação tecnologia desses materiais. Existem diversas formas de obtenção desses cristais, cada uma contribuindo para a confecção de materiais com diversas cristalografias, morfologias e energias reacionais superficiais. Aplicando-se o método correto e controlando os parâmetros de síntese se torna possível fabricar cristais mono ou policristalinos. Os policristais são de mais fácil obtenção e não requerem grandes controles. Os monocristais requerem reagentes de elevada pureza, controle da temperatura e métodos particulares que possibilitem a sua fabricação. Esse trabalho buscou elucidar dois mecanismos de obtenção de monocristais e as técnicas mais utilizadas na caracterização desses materiais. Os métodos escolhidos foram os de Bridgman e Czochralsky, por se apresentarem como sendo os mais utilizados para a fabricação de monocristais e por apresentar um menor custo operacional quando comparados a outras técnicas conhecidas na literatura.

Neste trabalho, a casca de arroz, resíduo da agroindústria brasileira, foi caracterizada e transformada em bio-óleo através do processo de pirólise rápida, utilizando um reator batelada. Foram avaliados os efeitos da temperatura e da granulometria da casca arroz no rendimento em produtos líquido, sólido e gasoso. As fases orgânica e aquosa do bio-óleo bruto foram separadas por extração e caracterizadas. Os resultados mostraram que a 130 ºC, o tempo de secagem de 90 min foi suficiente para remover a umidade da casca de arroz. A análise granulométrica mostrou que o tamanho predominante da casca de arroz está na faixa de 1,4

A utilização de materiais a base de fosfato de cálcio para a substituição de partes do osso humano removido por acidentes ou enfermidades tem sido objeto de pesquisas dentro das ciências dos materiais. A hidroxiapatita de cálcio se demonstrou bastante viável como material de fabricação de próteses e de enxertos ósseos, não apresentando rejeição do corpo humano e promovendo a osteoindução tecido natural/prótese. O entendimento dos mecanismos de obtenção desse material é de suma importância para se produzir materiais de elevada pureza e resistência mecânica. Vários parâmetros devem ser cuidadosamente controlados durante a síntese da hidroxiapatita visando à obtenção de um material com a microestrutura ideal para se promover a osteoindução após sua utilização. Os tratamentos térmicos envolvidos durante a síntese são fundamentais para se formar cristais bem ordenados e com maior resistência mecânica. As variações microestruturais sofridas pelos pós de hidroxiapatita em cinco diferentes temperaturas de tratamentos térmicos (105, 900, 1000, 1100 e 1200 °C) foram avaliadas com intuito de se estabelecer a temperatura ideal de sinterização da matriz cerâmica. A temperatura de sinterização ideal foi a que conseguiu promover o aparecimento de características fundamentais para a posterior utilização do material como prótese ou enxerto ósseo.

This study aimed to select grain sorghum R lines based on grain yield and disease traits. The experiment consisted of 360 experimental R lines and two checks cultivars CMSXS180R and 9503062R. The experimental design used was of augmented blocks. The evaluated characteristics were plant height, days to flowering, thousand-grain mass, grain yield, and evaluation of leaf blight (Exserohilum turcicum) and anthracnose (Colletotrichum graminicola). In the analysis of variance, the interaction between Lines and checks was significant for all characteristics evaluated. All traits showed heritability above 70%, except a thousand-grain mass below 60%. In this work, the lines that obtained the best means were L57 and L74, considered earlier, with plant height ideal for grain and a high grain yield and resistance to foliar diseases. RESUMO - O objetivo desse estudo foi realizar a seleção per se de linhagens restauradoras (R) de sorgo granífero, que se mostraram mais promissoras para atributos de rendimento de grãos e doenças em nível de campo. O experimento foi constituído de 360 linhagens R experimentais, e duas testemunhas elites CMSXS180R e 9503062R. O delineamento experimental utilizado foi de blocos aumentados. As características avaliadas foram altura de plantas, florescimento, massa de mil grãos, produtividade de grãos e avaliação de helmintosporiose (Exserohilum turcicum) e antracnose (Colletotrichum graminicola). Na análise de variância a interação entre as linhagens e testemunhas foi significativa para todas as características avaliadas. Todas as características apresentaram herdabilidade superior a 70%, exceto para massa de mil grãos que foi abaixo de 60%. Nesse trabalho as linhagens que obtiveram as melhores médias foram as L57 e L74, sendo consideradas precoces, com altura de plantas ideal para granífero, juntamente com alta produtividade de grãos e resistentes a doenças foliares. Made available in DSpace on 2022-07-11T12:20:53Z (GMT). No. of bitstreams: 1 Phenotypic-selection-of-grain-sorghum-restorer-lines.pdf: 929519 bytes, checksum: 474688ab661213474b7b410b4be651a5 (MD5) Previous issue date: 2022

The objective of the present work was to evaluate the physiological quality in seeds of haploidy inducers of different types and origins. To this end, between December 2015 and March 2016, a series of physiological quality assessments were conducted on nine genotypes inducing haploidy in corn, namely: the gymnogenetic inducers Stock 6, TAIL P1 and TAIL P2; the hybrid between the TAIL P1 x TAIL P2 inductors; the hybrid TAIL P2 x TAIL P1, analogous to the previous hybrid, but with inversion of the female parent at the crossing; and androgenetic inducers W23, 90109 igig, 91202 igig and 91207 igig. The tests carried out were germination, accelerated aging, emergence in a bed, emergence index, fresh and dry mass, length of aerial part and root and the ratio between these characteristics, the humidity and the weight of 100 seeds. The results indicated that the physiological quality was improved throughout the selection for greater haploid induction. The haploidy induction system (andorgenetic or gymnogenetic) does not interfere with physiological quality, however the results obtained reinforce the need for care in the multiplication and conservation of haploidy inducing seeds in tropical conditions for their use in breeding. Made available in DSpace on 2022-02-22T18:01:01Z (GMT). No. of bitstreams: 1 Physiological-quality.pdf: 570877 bytes, checksum: c2c2779d3e58485e55420797f7a22058 (MD5) Previous issue date: 2021

Magnesium is one of the essential elements for the plant growth. However, when the supply of magnesium is required exclusively, few economically feasible options are available. Serpentinite represents an alternative source of magnesium, although little is known about its potential and effi ciency under tropical soil conditions. This work aimed to evaluate the use of serpentinite as a soil remineralizer, as well as magnesium fertilizer. The study was conducted in a greenhouse, using a completely randomized design, with seven treatments and four replications, as follows: three levels of serpentinite, mix of serpentinite and phonolite, and the controls with dolomitic limestone and without fertilization. Two plant species (Zea mays L. corn hybrid BRS ? 1055 and Phaseolus vulgaris L. common bean variety BRS ? Estilo) and two contrasting soils (clayey and sandy texture), were used in pots. Results showed that serpentinite?s free silica and toxic element contents fi tted the legal requirements. No statistically signifi cant difference was observed for the plant dry matter weight production in the serpentinite and dolomitic limestone control, as well as in the pure serpentinite and the mix with phonolite treatments. The serpentinite was able to supply and to fullfil magnesium requirements for growth and development of corn and bean plants. Made available in DSpace on 2021-08-17T12:02:25Z (GMT). No. of bitstreams: 1 Evaluation-agricultural.pdf: 431590 bytes, checksum: 026c29b824d2911365ddbec1e8bf0ea2 (MD5) Previous issue date: 2021

The physicochemical and sensorial characterization of beef burgers with added sorghum flours as replacer for the isolated soy protein (ISP) usually used in the conventional formulations was performed. Three formulations were prepared: one conventional (CN) with 3% ISP and two with 3% tannin (BRS 305) and tannin-free (BR 501) whole sorghum flour (WSF) of BRS 305 and BR 501 genotypes. There was no difference among the formulations for most of the physicochemical characteristics. The moisture retention was higher in BRS 305 (P < .05). The added WSF influenced the color of the raw beef burger; and the proximate composition and the antioxidant characteristics of the raw and cooked formulations (P < .05). The purchase intention and flavor, texture and overallacceptabilityscoreswerehigherforthesorghumproductsthanCN(P < .05).Therefore,thereplacingof ISP by WSF in beef burger, especially by the BRS 305 genotype, might be a technologically, nutritionally and sensorially viable option. Made available in DSpace on 2019-02-04T23:39:01Z (GMT). No. of bitstreams: 1 Physicochemicalsensorial.pdf: 728318 bytes, checksum: baf3fba66f5b0665ca09e55e8feb5fc9 (MD5) Previous issue date: 2019-02-04 Publicado online em 13 dez. 2018.

This work verified the physiological quality of seeds of two maize cultivars treated in isolation and in association with an inoculant based on Azospirillum brasilense, biostimulants and a liquid fertilizer. The experiment was designed in a completely randomized 2x8 factorial scheme, comprising two maize cultivars (P30F53 and P30F53YH) and eight seed treatments (untreated; treated with inoculant; treated with biostimulants; treated with liquid fertilizer; treated with inoculant and biostimulant; treated with inoculant and liquid fertilizer; treated with biostimulant and liquid fertilizer; treated with inoculant, treated with liquid fertilizer and biostimulant). Percentage of germination, emergence in sand, germination speed index, cold test, and dry mass of shoots and root of seedlings were evaluated. The cultivar P30F53YH had seeds with better physiological quality compared with the cultivar P30F53 when treated with biostimulants, liquid fertilizer and Azospirillum. The biostimulant, liquid fertilizer and Azospirilum. either on their own or in combinations not involving the liquid fertilizer do not impair physiological qualityof maize seeds. Made available in DSpace on 2021-12-28T19:00:43Z (GMT). No. of bitstreams: 1 Physiological-quality.pdf: 298743 bytes, checksum: d2e42be2f7a81301e827591f811835d2 (MD5) Previous issue date: 2021

The objective of this work was to use the partial diallel methodology to compare double-haploid lines (DHs) of maize with lines obtained by traditional methods. To obtain hybrids, five double-haploid lines, used as female parents, were crossed with four testers, as male parents. Twenty hybrids were obtained from double-haploid lines, being: 8 experimental, and 8 commercial from Embrapa and 4 from other companies. Were evaluated; final stand (ST), tipping and breaking (LODG), plant height (PH), ear insertion height (EH), grain moisture at harvest (GM) and total grain weight (YIELD). Analysis of variance was performed, unfolding the degrees of freedom of the genotype, Tukey test at 5% probability, and the decomposition of the sums of squares of the treatments into general and specific combining ability for testers and DH lines. PH and EH were higher in hybrids derived from DHs lines, while productivity and final stand were higher in experimental controls. However, some hybrids, such as the hybrid DH1800007 presented higher YIELD than commercial and experimental controls. The data obtained demonstrate that hybrids derived from double-haploid lines, in addition to accelerating the time to obtain new cultivars, enable the development of hybrids with superior agronomic performance. Made available in DSpace on 2022-02-22T17:01:12Z (GMT). No. of bitstreams: 1 Agonomic-performance.pdf: 575272 bytes, checksum: 06cd61941c9447f6a9e82ea95098a9e7 (MD5) Previous issue date: 2021

Forage sorghum presents tall plants, what makes mechanical seed harvesting a difficult task. Plant hormones can reduce plant height and facilitate the harvesting. Thus, the objective of this study was to evaluate the effect of the growth regulator trinexapac-ethyl on plant height and seed yield in forage sorghum. This research was carried out at Embrapa Maize and Sorghum, in two seasons (2017 and 2018), in a randomized complete block design, four replications and three varieties (BRS Ponta Negra, 1141574 and 0947216) under application of Trinexapac-ethyl in two stages of the plant growth (V8, V12, V8 + V12). The characteristics evaluated were: plant height, seed yield and mass of 1000 seeds. The effect of the hormone was significant in both stages of growth, with a significant reduction in plant height. The hormone applied twice at growth stages V8 + V12 had a greater effect in reducing plant height. However, the hormone reduced seed yield in the three varieties, what implies the need for further studies comparing the advantage of plant height reduction and the loss in seed yield. Made available in DSpace on 2021-10-27T13:00:27Z (GMT). No. of bitstreams: 1 Trinexapac-ethyl-reduces.pdf: 493049 bytes, checksum: 42bff85016ca6a8a2608bce5b50fbd45 (MD5) Previous issue date: 2021

O presente estudo visa analisar, com base em dados de passaporte e de caracterização, a diversidade genética de acessos do BAG Milho representada pelas raças brasileiras de milho enviadas para a preservação no Banco Mundial de Sementes em Svalbard. Made available in DSpace on 2021-12-15T10:43:11Z (GMT). No. of bitstreams: 1 Diversidade-genetica.pdf: 958408 bytes, checksum: 455baf89e247e5b267def450ba62f801 (MD5) Previous issue date: 2021

Sorghum is one of the most drought-tolerant cereals. However, strong water stress, especially during the reproductive phase, causes significant grain yield reduction. Drought events are common in second crops planted after soybean harvest in Brazil. The objective of the present study was to assess grain sorghum hybrids grown under pre- and post-flowering drought stress. Twenty-five hybrids were subjected to two water stress environments (pre- and post-flowering) and one environment with non-water stress. The experimental design was a split plot based on a randomized complete block with three replicates. Water stress pre-flowering reduced plant height, accelerated flowering, and increased panicle index compared with water stress post-flowering. Both pre- and postflowering stress reduced yield, by 45% and 48%, respectively. Grain mass was greatly affected by stress occurring post-flowering but not by that occurring pre-flowering. Therefore, the reduction in yield caused by pre-flowering stress is due more to the reduction of grain number in the panicle, whereas the reduction when stress occurs post-flowering is due more to reduction in grain size. The plant chlorophyll index decreased when stress occurred pre-flowering and reverted after irrigation had resumed, demonstrating recovery in the photosynthetic capacity of the sorghum plant. With post-flowering stress, the chlorophyll index decreased significantly 30 days after the stress, affecting grain filling, with consequent yield loss. Made available in DSpace on 2021-11-04T02:08:35Z (GMT). No. of bitstreams: 1 Grain-sorghum-under.pdf: 504317 bytes, checksum: 3fc3c875b8c487324447a79b2e1a6a84 (MD5) Previous issue date: 2021

O queijo Minas Artesanal (QMA) é produzido a partir de leite bovino integral cru, coalho e soro-fermento, logo após a ordenha. Revestimentos comestíveis são películas feitas à base de amido, aplicados com objetivo de prolongar a vida de prateleira ou incorporar algum nutriente. Este trabalho avaliou o efeito da aplicação de um revestimento comestível em QMA produzido na mesorregião do Campo das Vertentes (Minas Gerais/Brasil) e verificou a possibilidade de diminuição do tempo de maturação deste produto. As amostras foram submetidas a análises microbiológicas e físicoquímicas com 4, 14 e 22 dias de maturação. Com exceção dos resultados de coliformes a 30 oC, todos os demais dados tornam o QMA apto para o consumo com 14 dias de maturação. As bactérias ácido-láticas foram os micro-organismos predominantes nas amostras. Os resultados médios das análises físico-químicas para as amostras controle e tratamento, respectivamente, foram: pH = 5,2 e 5,1; acidez titulável = 1,3 e 1,2 g de ácido lático/100 g de amostra; gordura 30,9 % e 31,4 %; extrato seco= 66,0 % e 66,2 %; umidade = 34,0 % e 33,8 %; gordura no extrato seco = 46,8 % e 47,1 % e proteínas = 22,6 % e 23,0 %. Não houve diferença estatística (p>0,05) entre os parâmetros microbiológicos e físicoquímicos pesquisados. Conclui-se que o revestimento não alterou significativamente os parâmetros avaliados, mas este estudo indica a possibilidade de diminuição do tempo de maturação para comercialização deste produto. Made available in DSpace on 2021-02-23T12:25:59Z (GMT). No. of bitstreams: 1 Influencia-aplicacao.pdf: 408998 bytes, checksum: 89fb1c3c5371f12add2c29bff82a040c (MD5) Previous issue date: 2020

Plant cover acts to maintain the balance between soil chemical, physical, and biological attributes, as well as superfcial soil protection. The aim of this study was to evaluate the impacts of iron ore mining and their reclamation on soil physical properties and soil visual quality in Fort Lauderdale Municipal Park and Serra do Curral Municipal Park, Iron Quadrangle (Quadrilátero Ferrífero), Minas Gerais State, Brazil. The evaluated areas varied in relation to the post-mining condition, natural revegetation (NR), an area with gully erosion (GA) and area under eucalyptus revegetation (ER) and native vegetation cover, rupestrian feld (RF), and seasonal semi-deciduous forest (NF). The main soil physical attributes evaluated were: soil organic matter (SOM), geometric mean diameter (GMD), weighted mean diameter (WMD), bulk density (Bd), air capacity (ACb), plant-available water capacity (AWC), relative feld capacity (RFC), and visual soil quality assessment. In addition to the impacts on the landscape, with removal of vegetation and soil cover, iron ore mining process impacts soil physical quality measured through porosity and aggregation properties and therefore could impact ecosystems services. Areas of iron post-mining that are not restored can develop gully erosion. NR shows high erosion risk inferred through aggregation indicators (GMD=3.84 mm; MWD=3.04 mm), despite similar soil organic matter content and higher plant-available water and air (NR [AWC=0.102 m3 m−3; ACb=0.328 m3 m−3], NF [AWC=0.062 m3 m−3; ACb=0.202 m3 m−3]) compared with NF (GMD=4.77 mm; MWD=4.56 mm). ER had similar soil structure stability compared to NF as well most of the porosity indicators, which is associated with the higher soil organic matter. Soil visual assessment alone was not able to characterize the soil physical quality, mainly in the post-mining areas, because it was designed for agricultural soils. Made available in DSpace on 2020-09-15T04:41:49Z (GMT). No. of bitstreams: 1 Iron-mining.pdf: 6322539 bytes, checksum: 0ecd63a1ec0525b8d5acb6c10e1d553f (MD5) Previous issue date: 2020 Publicado online em 9 set. 2020.

Current climate changes affect agricultural production. Crop management strategies can be used to mitigate these effects. This study was carried out to evaluate the use of crop and soil management strategies to mitigate the effects of future climate on maize yield in mesoregions of the state of Minas Gerais, Brazil. The CSM-CERESMaize model was used to simulate the effect of maize root system depth and of the amount of plant residue left on the soil surface by the previous crop in maize yield for different scenarios of change in precipitation and solar radiation. The decrease in rainfall volume reduced the average maize yield in some regions by more than 50%. The increase in solar radiation maize yield rise, while its reduction caused more than 20% yield drop in most regions. The management strategies evaluated have the potential to mitigate such effects. Made available in DSpace on 2020-03-13T15:59:09Z (GMT). No. of bitstreams: 1 Mitigating-effects.pdf: 902581 bytes, checksum: a7d5b519db674e1b9c67c11a889d7c1f (MD5) Previous issue date: 2019

This study investigated the interaction between two pest biological control agents, the parasitoidwasp Trichogramma pretiosum (Hymenoptera: Trichogrammatidae) and the entomopathogen Bacillusthuringiensis (Bacillales: Bacillacea) (Bt). The aim of this study was to evaluate if the presence of Bt (for-mulated products Agree®, Dipel®and HD1 and HD11 strains) interferes in the oviposition preference ofT. pretiosum to eggs of Helicoverpa zea (Lepidoptera: Noctuidae). Using an olfactometry test, the eggs ofH. zea were bathed with the commercial formulations, with the Bt suspensions or distilled water, andoffered to the parasitoid wasps in order to evaluate parasitism. The results showed that H. zea eggs sprayedwith commercial formulations and Bt strains did not interfere in the choice made by the parasitoid. Theparasitoid wasp is not able to distinguish between eggs with or without B. thuringiensis treatment, inde-pendently of strains suspension or commercial formulations. Therefore, these two control agents may beused together without negative interaction. Made available in DSpace on 2018-10-26T01:39:11Z (GMT). No. of bitstreams: 1 Doesbacillus.pdf: 679698 bytes, checksum: 4542ef83d063596d7c5f606ebd7e8e21 (MD5) Previous issue date: 2018-10-24

Plants present constitutive or induced defense mechanisms against herbivory. In addition, studies show that there are interactions between these different defense mechanisms when multiple species infestations occur. This study investigated the interaction between maize defensive mechanisms to control two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) under single and double species infestations with this spider mite and fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae). The experiment was carried out in a greenhouse with the following treatments: uninfested Bt (Bacillus thuringiensis Berliner; Bacillaceae) and conventional maize, single infestation with spider mite on Bt and conventional maize, and both maize types with infestations of spider mite and fall armyworm. Two d after infestation, all treatments were re-infested with spider mite. The number of eggs, immatures, and adult females (alive and dead) were recorded for re-infested populations. In addition, a leaf sample was taken from all maize plants for spectrometric analysis. There was no significant difference of biological variables of spider mite between Bt and conventional plants, as well as the ones from pre-infested and non-infested plants. The same chemical pattern of ions was observed on plants in these 4 groups. In the conventional pre-infested plants with spider mite and fall armyworm, the population of re-infested mite showed reduced survival and fertility. Defensive compounds detected were HMBOAGlc, Linoleoyl-GPI, and kaempferol rutinose. It was suggested that there is direct induced defense against spider mite in conventional maize in multiple infestations with spider mite and fall armyworm. Made available in DSpace on 2021-08-06T16:00:22Z (GMT). No. of bitstreams: 1 Multiple-infestations.pdf: 2186127 bytes, checksum: c18aab65076b72796e9074f39179b607 (MD5) Previous issue date: 2020

In the current scenario of climate change, sorghum crop has high growth potential, requiring adaptation and selection studies for the various Brazilian production environments. Sorghum is among the most drought-tolerant cereals; however, extended summer can reduce the size and number of grains in the plant, reflecting into poorer yields. Sorghum breeding programs aim to develop hybrids more tolerant to water deficit, to ensure profitable yield even in the face of drought stress. The objective of the present study was to evaluate the effects of water restriction on grain sorghum hybrids in the pre- and post-flowering phases in the Brazilian semiarid. Twenty-five hybrids were evaluated under controlled irrigation conditions in Nova Porteirinha-MG and Teresina-PI. In the Nova Porteirinha, the hybrids were cultivated under conditions of non-drought stress and with drought stress in pre- and post-flowering stage. On the other hand, in Teresina, the experiment took place with non-drought stress and drought stress at post-flowering stage. The experimental design was in randomized complete blocks, in factorial scheme, with three replications. Drought stress reduced grain yield by more than 40%, showing that even being resistant, sorghum is affected by drought. Hybrids 1168093, 1167092, 1236020 and 1423007 showed high yields in the various environments, outyielding the commercial controls, what allows the recommendation of these cultivars for the semiarid areas or late off-season in the Cerrado region. Made available in DSpace on 2020-07-02T11:11:36Z (GMT). No. of bitstreams: 1 GrainSorghumGrownJAS2020.12.4.pdf: 690667 bytes, checksum: 2d7693f45b05bd7cdbc3614dbcda345f (MD5) Previous issue date: 2020

The Brazilian Cerrado stands out in relation to grain production, however, in this region the occurrence of summer and irregular rainfall, drastically harm the non-irrigated production. Conservationist managements favor the soil physical quality and, consequently, the efficiency of soil water consumption. The objective of this study was to evaluate the soil physical quality, as a function of the conservation managements adopted, by using physical soil quality indicators, and to verify its relation with the soil organic carbon stocks and the grain yield in the Cerrado of Minas Gerais state, Brazil. For that, six treatments were evaluated: soybean (1) and maize (2) monocultures crop systems at medium level of investment in soil fertilization, soybean-maize crop succession at medium (3) and high (6) level of investment in soil fertilization, and crop succession of soybean-maize and intercropped with Urochloa ruziziensis at medium (4) and high (5) level of investment in soil fertilization, during the initial stage of no-tillage system. The treatments 3, 4, 5 and 6 showed improvement in the soil physical quality in relation to the monoculture. Pore distribution and soil organic carbon content were the main responsible for discriminating the intensified crop systems. Attributes related to water availability were important for plant growth in the 0-0.05 m layer, while for the 0.15-0.20 m layer, the highest soil aeration stood out. Productivity did not correlate with the evaluated attributes. Made available in DSpace on 2020-12-23T09:03:23Z (GMT). No. of bitstreams: 1 Soil-physical.pdf: 2382868 bytes, checksum: d980518e05247a91eb65787f543be67f (MD5) Previous issue date: 2020

The natural biological control of soil pests is poorly studied. Notably, the control of Helicoverpa armigera in the pupae stage is unknown. To increase knowledge about the control of this pest in organic and conventional maize crop, tests were conducted to verify if the duration of pupae availability in days, the type of crop treatment (organic and conventional), the stage of crop development, and the depth of the soil significantly affect predation by natural enemies. The pupae availability time (days) in the soil did not affect their removal by natural enemies. However, in the fallow stage, on the surface and in the reproductive phase, the predation was higher. In organic maize, predation was 15% higher when compared to conventional maize. The rupture of the soil and the possible losses associated with beneficial fauna were the main factors responsible for higher predation during fallow, so conservationist practices usually used in organic treatment are the main reason for higher predation in this type of crop. There is a significant decrease in the control of H. armigera pests by natural enemies when maize is grown using conventional practices, what reinforces the importance of the conservation techniques used in maize crops Made available in DSpace on 2020-05-22T04:39:48Z (GMT). No. of bitstreams: 1 Natural-control.pdf: 881979 bytes, checksum: 99e4c1eb68493438c0bdf454776df3f3 (MD5) Previous issue date: 2020

A precipitação é um fator decisivo no planejamento de ações na agricultura. Conhecer a distribuição de chuvas é ferramenta que auxilia de forma incisiva na tomada de decisões e quando aliado a técnicas conservacionistas de solo e água aumentam a efetividade das atividades principalmente em sistemas produtivos de sequeiro. Com o objetivo de conhecer a distribuição da precipitação e o ajuste de modelos probabilísticos, o presente estudo avaliou historicamente os dados da cidade de Formoso, em Minas Gerais. Os dados de precipitação foram obtidos de uma série histórica de 33 anos, captados de uma estação climática automática. Observou-se que os meses de maior volume de chuva abrange o período de novembro a fevereiro, que compreende um acumulado de 783mm, volume suficiente para o cultivo de diversas culturas de verão. O período de menor precipitação, entre abril e outubro, apresentou uma média de apenas 32 mm ao mês. Os melhores ajustes de modelos aos volumes de precipitação foram observados no gama e weibull. Made available in DSpace on 2019-12-12T18:18:31Z (GMT). No. of bitstreams: 1 Distribuicaoprecipitacao.pdf: 201946 bytes, checksum: 17f661a400812f0f1ba987584a4b7628 (MD5) Previous issue date: 2019

A utilização de sementes de alta qualidade é uma premissa para a formação de pastos visando à geração de sistemas de produção sustentáveis na produção pecuária. Uma prática comum é a aplicação à lanço de sementes nuas de braquiária em mistura com fertilizantes nitrogenados ou fosfatados. Objetivou-se estudar o efeito de seis tempos de contato (3, 12, 24, 48 e 72 horas) de ureia granulada com sementes de alta qualidade (alto valor cultural) de Brachiaria brizantha cultivar Marandu, na sua qualidade fisiológica. O delineamento experimental utilizado foi o inteiramente casualizado com tratamento adicional (sementes sem fertilizante) com quatro repetições. Foram avaliadas a porcentagem de emergência em areia, porcentual de germinação de plântulas normais, anormais e sementes mortas sobre papel em caixas gerbox em condições controladas de fotoperíodo e temperatura (35 °C por 8 horas de radiação e 20 °C por 16 horas no escuro). Verificou-se que com 72 horas de contato, todas as sementes apresentaram perda de viabilidade. O número de sementes mortas apresentou correlação significativa (p

Ora-pro-nóbis é uma hortaliça não convencional que apresenta elevados teores de proteínas, sendo pouco explorada no Brasil. Coberturas comestíveis podem ser aplicadas em alimentos para prolongar a vida de prateleira ou incorporar algum nutriente. Este trabalho objetivou avaliar o efeito da aplicação de uma cobertura comestível em folhas de ora-pro-nóbis minimamente processado, por análises microbiológicas, físico-químicas, compostos bioativos e atividade antioxidante, verificando a segurança, estabilidade e um possível caráter funcional do produto. Em nenhuma amostra houve diferença significativa na interação da cobertura comestível com o tempo de estocagem refrigerada (8 dias, 7 oC). As amostras apresentaram-se seguras para consumo durante todo o período avaliado (ausência de Salmonella sp., < 3 NMP/g de Coliformes a 45 oC e máximo 2,4 UFC/g de Contagem Total de Bolores e Leveduras). Os resultados médios gerais ao longo de todo o período de armazenamento refrigerado avaliado para cada variável foram: pH = 4,62; ATT = 0,82 g de ac. cítrico/100 g de amostra; cor instrumental: L = 42,78; a* = -13,95; b* = 21,53; umidade = 87,08%; perda de massa = 5,30%; carotenoides = 913,27 µg de carotenoides/g de amostra seca; compostos fenólicos = 11,44 mg GAE/100 g de amostra seca e atividade antioxidante = 359,65 µmol TE/g amostra em base seca. Concluiu-se que o protocolo definido foi eficiente no processamento mínimo de orapro-nóbis, foi possível desenvolver uma cobertura comestível adicionada de extrato aquoso de sorgo e esta não alterou significativamente a vida de prateleira do produto, porém trouxe ganhos expressivos de compostos fenólicos. Made available in DSpace on 2021-02-23T12:25:40Z (GMT). No. of bitstreams: 1 Aplicacao-extrato.pdf: 372905 bytes, checksum: b885f41d9b6352d986ae5db7ea7a3f9a (MD5) Previous issue date: 2021

RESUMO – O objetivo do trabalho foi identificar as plantas daninhas presentes no final do ciclo da cultura do sorgo, apos controle quimico. O experimento foi conduzido em campo, em delineamento experimental de blocos casualizados, com 23 tratamentos e 3 repeticoes. Os tratamentos foram aplicacoes de glyphosate + 2,4-D (1.500 + 1.000 g ha-1) isoladas aos 28, 21 e 7 dias antes da semeadura, e/ou associadas com atrazine + paraquat (1.000 + 300 g ha-1) no dia da semeadura, e/ou atrazine (1.000 g ha-1) isolada ou sequencial em pos-emergencia inicial e tardia; um tratamento adicional com atrazine + glyphosate (1.000 + 1.500 g ha-1) no dia da semeadura, e duas testemunhas (capinada e sem capina). O estudo fitossociologico foi realizado na pre-colheita do sorgo. As plantas daninhas foram identificadas e quantificadas pelo metodo do quadrado inventario (0,25 m²), e foram analisados os parâmetros frequencia, densidade e abundância, absolutas e relativas, e o indice de valor de importância (IVI). A dessecacao aos 28 dias antes da semeadura, associada a aplicacao no dia do plantio com herbicidas de contato e residual, somado de aplicacoes em pos-emergencia inicial e tardia, reduziu a frequencia, a densidade e a abundância das especies. Palavras-chave: Sorghum bicolor, BRS 332, fitossociologia, controle. PHYTOSOCIOLOGICAL SURVEY OF WEEDS IN GRAIN SORGHUM IN THE FUNCTION OF CHEMICAL MANAGEMENT ABSTRACT – The objective of this work was to identify the weeds present at the end of the crop cycle of sorghum after chemical control. The experiment was conducted in a randomized complete block design with 23 treatments and three replicates. The treatments were glyphosate + 2,4-D (1500 + 1000 g ha-1), isolated at 28, 21 and 7 days before sowing; and/or atrazine + paraquat (1000 + 300 g ha-1) on the day of sowing, and/or atrazine (1000 g ha-1) isolated or sequential in early and late post-emergence; an additional treatment with atrazine + glyphosate (1000 + 1500 g ha-1) on the day of sowing, and two controls (weeded and no weed). The phytosociological study was carried out in the pre-harvest of sorghum. Weeds were identified and quantified using the square inventory method (0.25 m²); and the parameters frequency, density and abundance (absolute and relative), and the importance value index (IVI) were Analyzed. The desiccation at 28 days before sowing, associated to the application on the day of planting with contact and residual herbicides, plus initial and late post-emergence applications reduced the frequency, density and abundance of the species. Keywords: Sorghum bicolor, BRS 332, phytosociology, control.

Direct and indirect induced defense mechanisms against herbivores can be manifested in maize (Zea mays L.) plants. Furthermore, there are constitutive defenses in which plants continuously express resistance traces. In recent decades has increased the production of transgenic maize plants that constitutively express proteins with insecticide action (Bt maize). The increase of the use of transgenic maize cultivars with the Bt (Bacillus thuringiensis) gene demand studies that evaluate the impacts caused by this technology on plant defense mechanisms and their impact on non-targeted organisms, as the two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae). We tested the hypothesis that Bt maize plants (expressing Cry1F protein) would be capable of inducing direct defenses to T. urticae after being attacked by these mites. Thus, we used plants of a commercial maize hybrid (30F35 Hx - expressing Cry1F protein) and plants of its respective non-Bt isogenic line (control). We compared the survival and reproductive performances of T. urticae on plants of both lines that were previously infested with conspecifics and on plants that did not suffer pre-infestations. The previous infestation of maize plants by T. urticae did not impacted the survival and reproductive abilities of adult and immature forms of the conspecific in both genotypes. These results suggest that, Bt maize expressing the Cry1F insecticidal protein, does not interfere in the induction of direct defense by the T. urticae when compared with conventional maize plants. Made available in DSpace on 2019-07-03T00:40:26Z (GMT). No. of bitstreams: 1 Directdefense.pdf: 233644 bytes, checksum: 95b0f45f1756a1bb512e2c81371f901f (MD5) Previous issue date: 2019

Edible flowers have been increasingly used in the Brazilian gastronomy because they are considered functional foods with high antioxidant potential. Studies on the management of cultivation of edible flowers to increase the production of bioactive compounds have been developed aiming at the improvement of production systems. The objective of this work was to evaluate the production of bioactive compounds in garden pansy (Viola wittrockiana Gams ex Nauenb. & Buttler) plants submitted to different levels of irrigation and mycorrhizal inoculation. The greenhouse experiment was conducted in randomized blocks in a 2x5 factorial design with the presence and absence of mycorrhizal inoculation in combination with 5 levels of water evaporation (120%, 100%, 80%, 60% and 40%) replaced by irrigation, totaling 10 treatments with 6 replicates. The contents of bioactive compounds (total phenolic compounds, flavonoids and total anthocyanins) present in the flowers, collected over the reproductive period, were evaluated. There was a significant interaction between the factors mycorrhizal inoculation and irrigation levels by F test (p < 0.05) for total flavonoids and anthocyanins. The best results in the production of bioactive compounds were obtained for irrigation at the 100% replenishment level of water evaporation without the presence of mycorrhizal inoculation. Made available in DSpace on 2019-12-12T18:17:37Z (GMT). No. of bitstreams: 1 Bioactivecompounds.pdf: 502534 bytes, checksum: 8a5fc5b3d7b289308a791469fcf902cf (MD5) Previous issue date: 2019

Soils with improved fertility indicate opportunities for more rational use of fertilizers. The objective of this study was to evaluate the management of potassium fertilization in the succession of soybean-corn in soil with improved fertility, in the southwestern region of the state, Goiás. The experiment was set in 5×3 factorial scheme, arranged in randomized blocks with four repetitions. The treatments consisted of the combination of potassium doses (0, 40, 80, 120 and 160 kg ha-1 of K2O) and seasons of application (100% of the dose in pre-planting, 100% of the dose in coverage and in installments with 50% of the dose in pre-planting + 50% in coverage). The best performance of soybean, considering grain yield, was obtained with the parceled application of 80 kg ha-1 of K2O, with production of 3.6 Mg ha-1. The highest corn production was obtained with the anticipated application of 160 kg ha-1 of K2O in soybean. In the management of potassium fertilization in improved fertility soil in the soybean-corn succession, the parceled application of 120 kg ha-1 of K2O kept the available K reserve in the soil constant when compared to its initial content. Made available in DSpace on 2019-12-10T18:22:14Z (GMT). No. of bitstreams: 1 Dosesapplication.pdf: 321322 bytes, checksum: abbf1760d1907cba6e8e41073e03def4 (MD5) Previous issue date: 2019

CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico Outra Agência A adubação nitrogenada modifica os padrões morfogênicos de crescimento das forrageiras. Logo, estudos sobre a resposta de plantas recém lançadas, como a capim BRS Quênia, à adubação podem contribuir sobremaneira com a recomendação estratégias de manejo e doses mais apropriadas do adubo. Objetivou-se com este trabalho avaliar a alocação de biomassa aérea e radicular, resposta morfogênica e a eficiência agronômica da adubação em plantas de Panicum maximum cv. BRS Quênia, sem adubação e adubadas com 50, 100 e 200 mg.dm-3 de nitrogênio. O experimento foi conduzido em casa de vegetação, em delineamento inteiramente casualizado com quatro repetições. As proporções de folha foram maiores que as proporções de colmo, independentemente da adubação nitrogenada. Houve maiores incrementos na produção de parte aérea em detrimento a produção de raiz. O aumento da adubação implicou em menor intervalo entre o surgimento das folhas do capim BRS Quênia, bem como aumentou o número de perfilhos por planta. A medida que se incrementa a adubação nitrogenada há diminuição da eficiência de uso do adubo. A adubação nitrogenada influencia positivamente a produção de forragem em plantas de Panicum maximum BRS Quênia e, independentemente da dose de adubação nitrogenada, a parte aérea funciona como principal dreno de nitrogênio. Nitrogen fertilization modifies the morphogen patterns of forage growth. Therefore, studies on the response of newly introduced plants, such as BRS Quênia, to fertilization can contribute greatly with the recommendation of management strategies and more appropriate doses of fertilizer. The objective with this research was to evaluate aboveground and root dry mass production and the morphogenetic and structural characteristics, as well as the agronomic efficiency of nitrogen fertilization in Panicum maximum cv. BRS Quênia, without fertilization and submitted to nitrogen levels (50, 100 and 200 mg/dm3). The experiment was conducted in the greenhouse in a completely randomized design whit four replication. Production characteristics and morphogenetic and structural characteristics of the plants were evaluated. The grass BRS Quênia responded to nitrogen fertilization for all characteristics evaluated. Leaf proportions were higher than stem proportions, regardless of nitrogen fertilization. There were larger increases in aboveground mass production than root production. The increase in fertilization implied in a shorter interval between the emergence of leaves of BRS Quênia grass, as well as increased number of tillers per plant. As nitrogen fertilization increases, there is a decrease in fertilizer efficiency. Nitrogen fertilization positively influences forage production in Panicum maximum BRS Quênia plants and, independently of nitrogen dosage, the aboveground mass acts as the main nitrogen drain.

The lower lignin content in plants species with energy potential results in easier cellulose breakdown, making glucose available for ethanol generation. However, higher lignin levels can increase resistance to insect attack. The objective of this work was to evaluate the susceptibility of a bmr-6 biomass sorghum (a mutant genotype with a lower concentration of lignin) to important pests of energy sorghum, Diatraea saccharalis and Spodoptera frugiperda. Experiments were performed in the laboratory and greenhouse to evaluate the development of these pests on the biomass sorghum bmr hybrids BR007, BR008, and TX635 and their respective conventional near-isogenic genotypes (without the bmr gene). The lignin content was higher in non-bmr hybrids, but the evaluated insect variables varied between treatments, not being consistent in just one hybrid or because it is bmr or not. The lowest survival of S. frugiperda was observed in the BR008 hybrid, both bmr and non-bmr. The S. frugiperda injury scores on plants in the greenhouse were high (>7) in all treatments. For D. saccharalis, there was no difference in larval survival in the laboratory, but in the greenhouse, the BR007 hybrid, both bmr and non-bmr, provided greater survival. Due the need to diversify the energy matrix and the fact that greater susceptibility of the bmr hybrids to either pests was not found in this study, these results hold promise for cultivation of these biomass sorghum hybrids for the production of biofuels. Resumo O menor teor de lignina em espécies de plantas com potencial energético resulta na maior facilidade de quebra da celulose, disponibilizando glicose para geração de etanol. Porém, maiores teores de lignina representa um fator de resistência ao ataque de insetos. O objetivo deste trabalho foi avaliar como importantes pragas do sorgo energia, Diatraea saccharalis e Spodoptera frugiperda, se comportam quanto à alimentação e desempenho em sorgo bmr-6, um genótipo mutante com menor concentração de lignina. Foram realizados experimentos em laboratório e casa de vegetação, avaliando o desenvolvimento destas pragas nos híbridos de sorgo biomassa bmr 007, 008, TX635 e seus respectivos genótipos isogênicos convencionais (sem o gene bmr). O teor de lignina foi maior nos híbridos não bmr, mas nos parâmetros avaliados nos insetos, houve variação entre os tratamentos, não sendo consistente em apenas um híbrido e nem por ser ou não bmr. A menor sobrevivência de S. frugiperda foi verificada no híbrido BR008 tanto bmr quanto não bmr. As notas de injúria por S. frugiperda no sorgo em casa de vegetação foram altas (>7) em todos os tratamentos. Para D. saccharalis, não houve diferença significativa para a sobrevivência larval em laboratório, mas em casa de vegetação o híbrido BR007 tanto bmr quanto não bmr proporcionaram maior sobrevivência. Diante da necessidade de diversificar a matriz energética e o fato de que não foi comprovada neste estudo maior suscetibilidade dos híbridos bmr a ambas as pragas, estes resultados são promissores para o cultivo desses híbridos de sorgo biomassa para produção de biocombustíveis.

O sorgo está associado a várias propriedades funcionais pelo fato de conter altos níveis de compostos fenólicos, como flavonoides, flavonas e flavanonas. No entanto, estes compostos são sensíveis ao período e condições de armazenamento. Assim, este trabalho teve como objetivo avaliar a retenção de luteolina, apigenina, naringenina e eriodictilol nos genótipos de sorgo SC319 (farinha e grão) e TX430 (farinha e farelo) armazenados por 180 dias a 4, 25 e 40 °C. Estes compostos foram quantificados por cromatografia líquida de alto desempenho acoplada a detector de arranjo de diodos. Houve efeito do tempo de armazenamento, que favoreceu a redução de flavona e flavanona nos genótipos avaliados. A temperatura de armazenamento influenciou as flavonas mais do que o conteúdo de flavanona. As retenções variaram de 70,27 a 88,72% para luteolina, 69,04 a 99,15% para apigenina, 56,92 a 88,51% para naringenina e de 77,10 a 93,42% para eriodictilol nas três temperaturas no final de 180 dias. Embora as flavonas e flavanonas tenham sido melhor conservadas a 4 °C (cerca de 88% de retenção), em temperatura ambiente (25 °C), as retenções de flavonas e flavanonas foram pelo menos 77% e 85% após 180 dias. Made available in DSpace on 2019-01-11T00:07:26Z (GMT). No. of bitstreams: 1 Retentionsome.pdf: 815232 bytes, checksum: 70dc7db822f68e59f1177829851ce142 (MD5) Previous issue date: 2019-01-09

Aim: The increasing use of cocaine (COC) during breastfeeding has led to growing concern about exposure of infants. Therefore, to study this exposure, a new method to analyze COC and benzoylecgonine in breast milk was developed. Methodology: A new extraction method was used for the first time to analyze COC and its major metabolite, benzoylecgonine, in breast milk using magnetic carbon nanotubes partially doped with nitrogen. Results: The calibration curves were linear in the range 5.0–180.0 ng ml-1. The limit of quantification was 5.0 ng ml-1. Coefficients of variation were between 3.2 and 13.9%. Recovery was between 89.6 and 99.2%. Conclusion: The proposed method is simple, efficient and suitable to determine analytes in breast milk.