An Innovative Approach for Modeling Crop Yield Response to Fertilizer Nutrients

Fertilizer recommendations seldom account for agro-climatic conditions, which are important factors that determine the response to fertilizer and the optimal rate of fertilizer. The nitrogen fertilizer response to open pollinated and hybrid canola types will also impact optimal nitrogen rates. This study used quantile regression to model canola yield response to nitrogen fertilizer. Quantile regression can apply different weights to the residuals, facilitating a response estimation where the agro-climatic conditions are not limiting and the yield response is due to the variable of interest. The economically optimal levels of fertilizers were calculated using the proposed and the conventional least squares procedures of the two canola types in western Canada. Results showed that the effects of nitrogen fertilizer on yield depended on the canola type and on the estimation procedure. Optimal levels of nitrogen for open-pollinated canola were estimated as 91, 115, and 134 kg ha-1 for severe, moderate and low levels of agro-climatic constraints. Hybrid had a higher yield potential, and also required more nitrogen fertilizer (137, 142, and 158 kg ha-1). Unlike conventional approach, proposed approach could benefit producer by recommending less (more) fertilizer when the crop response to fertilizer is expected to be low (high) due to agro-climatic conditions.Crop Production/Industries,

Neoblast Specialization in Regeneration of the Planarian Schmidtea mediterranea

Planarians can regenerate any missing body part in a process requiring dividing cells called neoblasts. Historically, neoblasts have largely been considered a homogeneous stem cell population. Most studies, however, analyzed neoblasts at the population rather than the single-cell level, leaving the degree of heterogeneity in this population unresolved. We combined RNA sequencing of neoblasts from wounded planarians with expression screening and identified 33 transcription factors transcribed in specific differentiated cells and in small fractions of neoblasts during regeneration. Many neoblast subsets expressing distinct tissue-associated transcription factors were present, suggesting candidate specification into many lineages. Consistent with this possibility, klf, pax3/7, and FoxA were required for the differentiation of cintillo-expressing sensory neurons, dopamine-β-hydroxylase-expressing neurons, and the pharynx, respectively. Together, these results suggest that specification of cell fate for most-to-all regenerative lineages occurs within neoblasts, with regenerative cells of blastemas being generated from a highly heterogeneous collection of lineage-specified neoblasts.National Institutes of Health (U.S.) (R01GM080639)National Science Foundation (U.S.). Graduate Research Fellowship Program (Grant 1122374

Sociodemographic profile and self-referred health conditions of the elderly in a city of Southern Brazil

OBJECTIVE: To assess the association between gender and age groups and socioeconomic and health variables among older adults. METHODS: Cross-sectional study carried out in the a city in Southern Brazil, in 2004. Elderly over 60 years of age (N= 292) were selected through two-stage probabilistic sampling. Data from socioeconomic and demographic variables were collected through household survey. Health conditions were self-referred. Descriptive statistics, and Pearson's Chi-square test with linear-by-linear association model were used for data analysis. RESULTS: Among the elderly, 67.8% were female, 84% were between 60 to 79 years and 81% considered themselves healthy. Compared to men, women were more likely to live alone (p=0.046), have no partner (p<0.001), be less educated (p=0.021), report more health conditions (p=0,003), use more medications (p=0.016), exercise less (p=0.015), be more dependent to perform activities of daily living (p<0.001), receive lower pension benefits (p<0,001), have less paid jobs (p=0.002). But women perceived themselves as having more social support (p=0.023), consumed less alcohol (p=0.003) and were not smokers (p<0.001). Those with more advanced age were less educated (p<0.001), had poorer economic conditions (p=0.004), received lower pension benefits (p<0,001), were less likely have a partner (p<0.001) and were more dependent to perform activities of daily living (p<0.001) but perceived themselves with more social support (p=0.014) and were not smokers (p<0.001). CONCLUSIONS: Differences between gender and age group were evidenced and they were more marked among women and those with more advanced age.OBJETIVO: Avaliar a associação entre sexo e grupo etário com variáveis socioeconômicas e de saúde dos idosos. MÉTODOS: Estudo transversal realizado no Distrito Noroeste de Porto Alegre, Rio Grande do Sul, em 2004. Foram estudados indivíduos acima de 60 anos (N=292), selecionados por amostra probabilística em dois estágios. Os dados de variáveis socioeconômicas e demográficas foram coletados por inquérito domiciliar. As condições de saúde foram auto-referidas. Foram realizadas análises descritivas, de qui-quadrado de Pearson e tendência linear. RESULTADOS: Entre os idosos, 67,8% eram do sexo feminino, 84% encontravam-se na faixa dos 60 aos 79 anos, 81% consideravam-se saudáveis. Em comparação com os homens, as mulheres moravam mais sozinhas (p=0,046), sem companheiro (p<0,001), tinham menor escolaridade (p=0,021); relatavam mais problemas de saúde (p=0,003) e uso de medicação sistemática (p=0,016); realizavam menos atividades físicas (p=0,015) e eram mais dependentes nas atividades de vida diária (p<0,001), recebiam menos aposentadoria (p<0,001), exerciam menos atividades remuneradas (p=0,002), mas se percebiam mais apoiadas pela rede social informal (p=0,023), consumiam menos bebidas alcoólicas (p=0,003) e não eram fumantes (p<0,001). Os mais idosos tinham menor escolaridade (p<0,001), piores condições econômicas (p=0,004), recebiam menos aposentadoria (p<0,001), não tinham companheiro (p<0,001), eram mais dependentes nas atividades de vida diária (p<0,001), mas se percebiam mais apoiados pela rede social informal (p=0,014) e não eram fumantes (p<0,001). CONCLUSÕES: Foram evidenciadas diferenças quanto a gênero e grupo etário para variáveis socioeconômicas e de saúde, sendo piores para as mulheres e para os idosos mais velhos.Universidade Federal de São Paulo (UNIFESP)UNIFESP Departamento de EnfermagemUNIFESP, Depto. de EnfermagemSciEL

Water resources management at the University of Alicante for landscape irrigation from groundwater desalination

The southeastern part of the Iberian Peninsula is an area of water resources scarcity and important seasonal demand. Moreover, aquifers with low quality water for consumption due to salinity also exist precluding its further use. However, since the important concern of water shortage has been growing, possible exploitation of low quality groundwater has been taken into consideration. An example of sustainable use of the treated saline water developed by University of Alicante (UA) is presented, where pumped groundwater from the in campus existing aquifer is applied for landscape irrigation after RO desalination by the existing plant.Postprint (published version

Ureaplasma urealyticum and mycoplasma hominis sensitivity to bacteriocins produced by two lactobacilli strains

The purpose of the present study was to determine the inhibitory activities of two bacteriocins, produced by lactobacilli, against genital mycoplasmas. In this study, infections produced by genital mycoplasmas were studied; of these, 1.3% were caused by Mycoplasma hominis, 10.7% by Ureaplasma urealyticum and 5.6% by U. urealyticum + M. hominis. U. urealyticum was isolated from 75 out of 123 patients with genital mycoplasmas, while M. hominis was isolated from 9 patients (7.3%) and both U. urealyticum and M. hominis from 39 patients (31.7%). Bacteriocins, L23 and L60, produced by Lactobacillus fermentum and L. rhamnosus, respectively, appear to be two novel inhibitors of bacterial infection with potential antibacterial activity. Both bacteriocins proved to be active against 100% of strains tested; MICs of bacteriocin L23 ranged between 320 and 160 UA ml -1 for 78% of the M. hominis strains and between 320 and 80 UA ml -1 for 95% of the U. urealyticum strains. In addition, bacteriocin L60 was still active at 160 UA ml -1 for a high percentage (56%) of M. hominis strains, and at 80 UA ml -1 for 53% of the U. urealyticum strains. Interestingly, these antimicrobial substances produced by lactobacilli showed an inhibitory activity against genital mycoplasmas even when diluted. Altogether, our study indicates that the bacteriocins, L23 and L60, are good candidates for the treatment or prevention of genital infections in women.Fil: Daniele, M.. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología; ArgentinaFil: Ruiz, Francisco Oscar. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Pascual, L.. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología; ArgentinaFil: Barberis, Isabel Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas, Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología; Argentin

Desenvolvimento do PIBID Ciências Biológicas UNESPAR/Campus Paranavaí

Anais do II Seminário Seminário Estadual PIBID do Paraná: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes — Foz do Iguaçu: Unioeste; Unila, 2014Este trabalho tem como objetivo apresentar a experiência de intervenção realizada pelo PIBID subárea de Ciências Biológicas realizado de fevereiro a setembro de 2014 na UNESPAR/Campus Paranavaí. Participam deste estudo, 3 coordenadoras, 4 supervisoras e 24 acadêmicos bolsistas distribuídos em 4 escolas na cidade de Paranavaí, Paraná. Foram realizados 24 encontros semanais entre os participantes do programa para planejamento das atividades desenvolvidas. Os acadêmicos em duplas desenvolveram suas atividades nas escolas em sistema de rodízio onde os alunos de cada sala são divididos em dois grupos (laboratório e sala de aula). Foram apresentados 14 trabalhos em Paranavaí e 01 aprovado para apresentação na cidade do México e 05 em Matinhos/PR. Concluímos que esta forma de intervenção garante ao acadêmico vivência no cotidiano escolar contribuindo assim para sua formação e futura atuação docent

UV/H2O2 process as post-treatmentfor removal of color and polishing end in textile wastewater

Several problems are involved the treatment plants of textile effluents, mainly the low efficiency of color removal. This paper presents an alternative of post-treatment by UV/H2O2 process, for color removal in biologically treated textile effluents. The tests were performed in a photochemical reactor and samples were taken at different times to perform analyses. Using 250 mgH2O2.L-1, 96% removal of color was verified, indicating the dyes degradation. A reduction of 84% of aromatics compounds, 90% of TSS removal, and a further reduction of the organic fraction were observed, demonstrating that the process is effective as a post-treatment of effluents from textile industries