361 research outputs found
Estabilidade de genótipos de feijoeiro-comum com grãos carioca em Goiás e Distrito Federal.
Foram instalados ensaios de Valor de Cultivo e Uso (VCU) de feijoeiro comum em 19 ambientes dos Estados de Goiás e Distrito Federal, nas safras de seca inverno-águas/2009 e seca-inverno/2010
Linhagens de feijoeiro comum resistentes à murcha de fusário avaliadas quanto a caracteres de interesse agronômico.
Linhagens obtidas em um programa de melhoramento da Embrapa Arroz e Feijão para resistência à murcha de fusário foram avaliadas, com o objetivo de confirmar a resistência em condições de campo e verificar seu desempenho quanto a outras características de interesse agronômico, em ensaios de Valor de Cultivo e Uso (VCU). As linhagens CNFP 15869, CNFP 15867, CNFP 15870 e a cultivar BRS Esplendor tiveram reação de resistência
Structural Performance-Based Design Optimisation of a Secondary Mirror for a Concentrated Solar Power (CSP) Plant
Concentrated Solar Power (CSP) plants use mirrors to reflect and concentrate sunlight onto a receiver, to heat a fluid and store thermal energy, at high temperature and energy density, to produce dispatchable heat and/or electricity. The secondary mirror is a critical component in the optical system of certain Solar Power Tower plants (SPT), as it redirects the concentrated sunlight from the primary mirror onto the receiver, which can be arranged at ground level. In this study, we propose a design optimisation for the secondary mirror of a CSP plant. The design optimisation method consists of two steps. The first step involves the use of the finite element simulation software Abaqus 2022 to analyse the structural performance of the secondary mirror under thermal loads and wind. The second step consists of the use of simulation results to identify the combination of design parameters and best performances, with respect to both design constraints and structural safety. This is carried out by developing an algorithm that selects those configurations which satisfy the constraints by using safety coefficients. The proposed optimisation method is applied to the design of a potential configuration of a secondary mirror for the beam-down of the CSP Magaldi STEM® technology, although the methodology can be extended to other components of CSP plants, such as primary mirrors and receivers, to further enhance the structural performance of these systems
Boas práticas para produção de sementes.
A produção de semente comercial é controlada por normas restritas estabelecidas em nível estadual. No Estado do Mato Grosso do Sul, as normas são estabelecidas pela Comissão Estadual de Sementes e Mudas (CESM/MS) e os padrões nacionais encontram-se no Ministério da Agricultura, Pecuária e Abastecimento.bitstream/item/214628/1/CNPAF-2009-p48.pd
Demographics, Support Opportunities, and Self-Reported Well-Being of Patients Presenting for Hepatitis C Treatment at a Federally Qualified Health Center in Philadelphia
Introduction: As the opioid epidemic develops and evolves, the number of people who inject drugs is rising. A growing number of new Hepatitis C Virus (HCV) infections have been identified in people who inject drugs.
Objective: This study aims to better understand the demographics, well-being, and satisfaction with medical care of patients presenting for HCV treatment at a Federally Qualified Health Center (FQHC) in an urban setting. The study also looks to assess the impact of continued connection to holistic medical care.
Methods: Surveys were administered to 51 unique patients at their first visit for HCV treatment. Along with demographic questions, the survey included the PHQ-9 depression screen, the PSQ-18 patient satisfaction questionnaire, the AUDIT-C alcohol screen, the SF-12 Health Survey, and an HCV risk factor assessment. Nineteen of the 51 patients were re-surveyed after 3 months.
Conclusion: Many of the patients presenting for HCV treatment face difficulties such as substance use, homelessness, low socioeconomic status, disability, unemployment, and a history of incarceration. HCV treatment offers opportunities to connect patients to a support system that addresses those problems. The patients surveyed, who had access to patient navigators, social workers, behavioral health counselors, and benefits coordinators, showed improvements in general health, mental health, and in satisfaction with their care. More data is needed to see if the results are generalizable to a broader population.
Pro198Leu polymorphism affects the selenium status and GPx activity in response to Brazil nut intake
© The Royal Society of Chemistry 2015. Selenoproteins play important roles in antioxidant mechanisms, and are thus hypothesised to have some involvement in the pathology of certain types of dementia. Mild cognitive impairment (MCI) and Alzheimer's disease (AD) are both thought to involve impaired biological activity of certain selenoproteins. Previously, supplementation with a selenium-rich Brazil nut (Bertholletia excelsa) has shown potential in reducing cognitive decline in MCI patients, and could prove to be a safe and effective nutritional approach early in the disease process to slow decline. Here, we have conducted a pilot study that examined the effects of a range of single nucleotide polymorphisms (SNPs) in genes encoding the selenoproteins glutathione peroxidase (GPX1) and selenoprotein P (SEPP) in response to selenium supplementation via dietary Brazil nuts, including selenium status, oxidative stress parameters and GPX1 and SEPP gene expression. Our data suggest that GPX1 Pro198Leu rs1050450 genotypes may differentially affect the selenium status and GPx activity. Moreover, rs7579 and rs3877899 SNPs in SEPP gene, as well as GPX1 rs1050450 genotypes can influence the expression of GPX1 and SEPP mRNA in response to Brazil nuts intake. This small study gives cause for larger investigations into the role of these SNPs in both the selenium status and response to selenium dietary intake, especially in chronic degenerative conditions like MCI and AD
Interação genótipos por ambientes em ensaios de feijoeiro-comum para agricultura familiar em Goiás.
Com a finalidade de orientar o programa de melhoramento do feijoeiro-comum visando ao desenvolvimento de cultivares produtivas e adaptadas ao cultivo familiar, este trabalho teve como objetivo estudar a interação de genótipos por ambientes em ensaios de Valor de Cultivo e Uso (VCU). Foram analisados os dados dos ensaios de Valor de Cultivo e Uso (VCU) de feijoeiro-comum implementados em 20 ambientes do Estado de Goiás, conduzidos em dois ciclos (2007/08 e 2009/2010) nas safras da seca, das águas e inverno. Cada ensaio foi constituído por quinze genótipos de feijoeiro-comum dos grupos comerciais carioca, roxo e rosinha. O delineamento utilizado foi de blocos completos casualizados com três repetições. Foi utilizada a metodologia de Annicchiarico (1992) para obter as estimativas dos parâmetros de adaptabilidade e estabilidade das linhagens e cultivares. Os genótipos CNFC 10729, CNFRX 10241 e CNFC 10753 superaram a média dos ambientes em 11,587%; 7,061% e 6,667% respectivamente
Regionalização de áreas produtoras de feijão comum para recomendação de cultivares no Brasil.
Caracterização do problema. Definição de regiões homogêneas.bitstream/CNPAF-2010/29961/1/comt-187.pd
Indicadores de qualidade do solo em unidades piloto de produção integrada de feijão comum (Phaseolus vulgaris L.).
Neste trabalho são apresentados os primeiros resultados da avaliação da atividade enzimática do Projeto de Produção Integrada de Feijão Comum, iniciado em 2008, sob a coordenação da Embrapa Arroz e Feijão, e que tem como desafio a implantação de um modelo de produção integrada de feijão, visando elevar a qualidade do produto para o consumidor interno, bem como obtê-lo com potencial para alcançar mercados internacionais, viabilizando a obtenção do selo de certificação
Prospective Study on Several Urinary Biomarkers as Indicators of Renal Damage in Children with CAKUT
Purpose The aim of the study was to investigate urinary levels of monocyte chemotactic protein-1 (MCP-1), epidermal growth factor (EGF), β-2-microglobulin (β2M), and FAS-ligand (FAS-L) in children with congenital anomalies of kidney and urinary tract (CAKUT) disease at risk of developing glomerular hyperfiltration syndrome. For this reason, we selected patients with multicystic kidney, renal agenesia and renal hypodysplasia, or underwent single nephrectomy. Materials and Methods This prospective, multicentric study was conducted in collaboration between the Pediatric Surgery Unit in Foggia and the Pediatric Nephrology Unit in Bari, Italy. We enrolled 80 children with CAKUT (40 hypodysplasia, 22 agenetic; 10 multicystic; 8 nephrectomy) who underwent extensive urological and nephrological workup. Exclusion criteria were recent urinary tract infections or pyelonephritis, age > 14 years, presence of systemic disease, or hypertension. A single urine sample was collected in a noninvasive way and processed for measuring by enzyme-linked immunosorbent assay urine levels of MCP-1, EGF, β2M, and FAS-L. As control, urine samples were taken from 30 healthy children. Furthermore, we evaluated the urinary ratios uEGF/uMCP-1 (indicator of regenerative vs inflammatory response) and uEGF/uβ2M (indicator of regenerative response vs. tubular damage). Results These results suggest that urinary levels of MCP-1 are overexpressed in CAKUT patients. Furthermore, our findings clearly demonstrated that both uEGF/uMCP-1 and uEGF/uβ2M ratios were significantly downregulated in all patient groups when compared with the control group. Conclusion These findings further support that CAKUT patients may, eventually, experience progressive renal damage and poor regenerative response. The increased urinary levels of MCP-1 in all groups of CAKUT patients suggested that the main factor responsible for the above effects is chronic renal inflammation mediated by local monocytes
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