Geoespacialização dos teores de fósforo e potássio em latossolo amarelo sob diferentes sistemas de preparo no cerrado piauiense.

O mapeamento da variabilidade dos atributos químicos do solo auxilia na racionalização das atividades agrícolas. Este estudo teve por objetivo avaliar a variabilidade espacial dos teores de fósforo e potássio em um Latossolo Amarelo no cerrado piauiense. Estudaram-se os sistemas plantio convencional (SPC), plantio direto (SPD), além da vegetação nativa (VNC). As amostras de solo foram coletadas em janeiro de 2011, em 17 pontos georeferenciados, nas camadas de 0-10 e 10-20 cm. Realizou-se a análise estatística descritiva e elaboraram-se os mapas dos teores de P e K para as duas camadas, por meio da interpolação por krigagem, utilizando-se o software gvSIG. Os teores de P e K apresentaram, em geral, médio coeficiente de variação na área estudada. Foram observados maiores valores de P e K na camada de 0-10 cm, em todos os sistemas de manejo. O sistema de plantio direto obteve os maiores teores, seguido do plantio convencional e vegetação nativa. O monitoramento dos atributos químicos do solo ajuda a mantê-lo produtivo e sustentável

A coleção de isolados de Magnaporthe oryzae da Embrapa Arroz e Feijão: uma micoteca para uso na pesquisa com brusone.

As coleções de cultura de microrganismos. A coleção de fitopatógenos da Embrapa Arroz e Feijão. A coleção de Magnaporthe oryzae da Embrapa. O fungo Magnaporthe oryzae (Pyricularia oryzae). Metodologia. Recebimento do material vegetal. Indução da conidiogênese (formação de conídios). Isolamento monospórico. Armazenamento dos isolados. Determinação de patótipos. Registro do isolado na coleção.bitstream/item/27881/1/doc-259.pd

Bioética no cuidado e atenção do nascido interssexo: necessidade de revisão na prática clínica

A revista de Nature relata que o percentual de pessoas intersexuais é de 1%, proporção similar àquela de pessoas com os cabelos ruivos, um número muito significativo de pessoas. Esse termo é usado para uma variedade de condições nas quais uma pessoa nasce com uma anatomia reprodutiva ou sexual que não parece se encaixar nas definições típicas de mulher ou homem. Na década de 1950, uma equipe de especialistas médicos da Universidade Johns Hopkins desenvolveu o que veio a ser chamado de sistema de “sexo ótimo para criação” para o tratamento de crianças com interssexo. A idéia consistia que em casos de intersexuais a designação de gênero fosse resolvida cedo, para que as crianças crescessem e se tornassem “bons” meninas e meninos (dentro do padrão heterocisnormativo). Sob a liderança teórica do psicólogo John Money, a equipe de Hopkins acreditava que o gênero seria tutelado pela criação e poderia transformar qualquer criança em uma menina ou menino “real” se fizesse com que seus corpos parecessem corretos (antes dos 18 meses de idade), fazendo com que eles e seus pais acreditassem na atribuição de gênero

Comparative characterization of resistance proteins in Coffea species

info:eu-repo/semantics/publishedVersio

Cover crops in the off-season in the weed management at no-tillage area.

Cover crops can provide suppression of weeds and together with chemical control make the proper management of weeds in agricultural areas. The objective of this study was to evaluate the effect of cover crop cultivation during the off-season on weed development in a no-tillage area. The experimental design was in randomized blocks scheme with six treatments and four replications. The treatments were: fallow (control), millet (Pennisetum glaucum) + crotalaria (Crotalaria spectabilis + C. juncea + C. ochroleuca), millet + pigeon pea (Cajanus cajans), millet + Urochloa ruziziensis, millet + Urochloa ruziziensis + pigeon pea and millet + buckwheat (Fagopyrum esculentum. The evaluations were done at 30, 75 and 225 days after sowing of the cover crops (DAS). The main growth weed species in the area were Cenchrus echinathus, Euphorbia heterophylla and Digitaria insularis. Fallow treatment showed greater number of weed species with density of 184 plants m-2, 9.0 species and with 527.8 g m-2 of dry matter mass at 225 DAS. In all treatments verified reduction in the density and mass of weeds dry matter compared to the fallow, with average of 30 plants m-2, 5.8 species and 7.9 g m-2 at 225 DAS, respectively. The use of cover crops is an important strategy for weed control in agricultural areas

Genome wide scan for quantitative trait loci affecting tick resistance in cattle (Bos taurus × Bos indicus)

<p><b>Abstract</b></p> <p><b>Background</b></p> <p>In tropical countries, losses caused by bovine tick <it>Rhipicephalus (Boophilus) microplus</it> infestation have a tremendous economic impact on cattle production systems. Genetic variation between <it>Bos taurus</it> and <it>Bos indicus</it> to tick resistance and molecular biology tools might allow for the identification of molecular markers linked to resistance traits that could be used as an auxiliary tool in selection programs. The objective of this work was to identify QTL associated with tick resistance/susceptibility in a bovine F2 population derived from the Gyr (<it>Bos indicus</it>) × Holstein (<it>Bos taurus</it>) cross.</p> <p>Results</p> <p>Through a whole genome scan with microsatellite markers, we were able to map six genomic regions associated with bovine tick resistance. For most QTL, we have found that depending on the tick evaluation season (dry and rainy) different sets of genes could be involved in the resistance mechanism. We identified dry season specific QTL on BTA 2 and 10, rainy season specific QTL on BTA 5, 11 and 27. We also found a highly significant genome wide QTL for both dry and rainy seasons in the central region of BTA 23.</p> <p>Conclusions</p> <p>The experimental F2 population derived from Gyr × Holstein cross successfully allowed the identification of six highly significant QTL associated with tick resistance in cattle. QTL located on BTA 23 might be related with the bovine histocompatibility complex. Further investigation of these QTL will help to isolate candidate genes involved with tick resistance in cattle.</p

Complete blood count parameters as biomarkers of retinopathy of prematurity: a Portuguese multicenter study

Purpose: To evaluate complete blood count (CBC) parameters in the first week of life as predictive biomarkers for the development of retinopathy of prematurity (ROP). Methods: Multicenter, prospective, observational study of a cohort of preterm infants born with gestational age (GA) < 32 weeks or birth weight < 1500 g in eight Portuguese neonatal intensive care units. All demographic, clinical, and laboratory data from the first week of life were collected. Univariate logistic regression was used to assess risk factors for ROP and then multivariate regression was performed. Results: A total of 455 infants were included in the study. The median GA was 29.6 weeks, and the median birth weight was 1295 g. One hundred and seventy-two infants (37.8%) developed ROP. Median values of erythrocytes (p < 0.001), hemoglobin (p < 0.001), hematocrit (p < 0.001), mean corpuscular hemoglobin concentration (p < 0.001), lymphocytes (p = 0.035), and platelets (p = 0.003) of the group of infants diagnosed with ROP any stage were lower than those without ROP. Mean corpuscular volume (MCV) (p = 0.044), red blood cell distribution width (RDW) (p < 0.001), erythroblasts (p < 0.001), neutrophils (p = 0.030), neutrophils-lymphocytes ratio (p = 0.028), and basophils (p = 0.003) were higher in the ROP group. Higher values of MCV, erythroblasts, and basophils remained significantly associated with ROP after multivariate regression. Conclusion: In our cohort, the increase in erythroblasts, MCV, and basophils in the first week of life was significantly and independently associated with the development of ROP. These CBC parameters may be early predictive biomarkers for ROP.info:eu-repo/semantics/publishedVersio