Physiological quality of soybean seeds grown under different low altitude field environments and storage time

The use of high-quality seeds is essential to maintain high rates of production and productivity. The physiological quality of seeds obtained in the field is directly correlated to storage conditions and storage time. This study aimed to evaluate the physiological quality of soybean seeds in relation to different field environments (seed lots) and storage time. Commercial lots of seeds of the soybean cultivar M8349 IPRO were stored for three and six months. Seed moisture content was determined before and after accelerated aging, along with seed germination percentage and vigour evaluations performed before and after each storage period. The experiment was carried out as a completely randomised factorial design (10 × 3): with ten seed lots and three storage periods. The data were analysed by ANOVA, and the means of four independent replicates for each parameter evaluated were compared using the Scott-Knott test at 5% probability (P ≤ 0.05). Our results revealed that the low altitude regions where the seed samples were collected are suitable for soybean seed production with high physiological quality. Seed storage for six months does not cause a significant reduction in subsequent soybean seed field performance

tratamento De Fístula Arteriovenosa Adquirida Com Repercussões Hemodinâmicas Graves: Desafio

A 34-year-old female patient with severe heart failure and pulmonary hypertension was diagnosed late with a high-output acquired arteriovenous fistula between the right common iliac vein and artery. The most probable cause was an iatrogenic vascular injury inflicted during a prior laparoscopic cholecystectomy. Treatment was conducted by placement of an endoprosthesis in the common iliac artery, achieving total exclusion of the fistula and complete remission of symptoms. Considering the options available for treating this type of lesion, endovascular techniques are becoming ever more effective and are now the option of first-choice for management of this pathology.A 34-year-old female patient with severe heart failure and pulmonary hypertension was diagnosed late with a high-output acquired arteriovenous fistula between the right common iliac vein and artery. The most probable cause was an iatrogenic vascular injur1313438sem informaçãosem informaçãoPinto, D.M., Bez, L.G., Dias, J.O., Lopes, C.S., Mandi, A., Iliac aneurysm associated with arteriovenous fistula (2007) J Vasc Bras., 6 (3), pp. 299-302Davis, P., Gloviczki, P., Cherry, K., Aorto-caval and ilio-iliac arteriovenous fistulae (1998) Am J Surg., 176, pp. 115-118. , http://dx.doi.org/10.1016/S0002-9610(98)00166-4Queiroz, A.B., Mulatti, G.C., Aun, R., Valentim, L.A., Puech-Leão, P., Endovascular repair of a traumatic arteriovenous fistula involving the iliac bifurcation using an iliac branch device (2012) J Vasc Surg., 55 (5), pp. 1474-1476. , http://dx.doi.org/10.1016/j.jvs.2011.12.006, May, Epub 2012 Jan 24Kuehnl, A., Zimmermann, A., Pongratz, J., Eckstein, H.H., Young girl presenting with heart failure 5 years after laparoscopic appendectomy. Case report of an ilio-iliac AV fistula (2010) Eur J Vasc Endovasc Surg., 40 (1), pp. 107-109. , http://dx.doi.org/10.1016/j.ejvs.2010.02.013, JulSexton, J.A., Ricotta, J.J., Endovascular approaches to arteriovenous fistula (2011) Adv Surg., 45, pp. 83-100. , http://dx.doi.org/10.1016/j.yasu.2011.03.011Weng, C.F., Wei, J., Lee, Y.T., High-output Heart Failure Resulting from an Obscure Traumatic Arteriovenous Fistula (2008) J Chin Med Assoc, 71 (8), pp. 428-430. , http://dx.doi.org/10.1016/S1726-4901(08)70096-0Wang, E.A., Lee, M.H., Wang, M.C., Lee, H.Y., Iatrogenic left iliac-caval fistula: Imaging and endovascular treatment (2004) AJR Am J Roentgenol., 183 (4), pp. 1032-1034. , http://dx.doi.org/10.2214/ajr.183.4.1831032, OctChaudry, M., Flinn, W.R., Kim, K., Neschis, D.G., Traumatic arteriovenous fistula 52 years after injury (2010) J Vasc Surg., 51 (5), pp. 1265-1267. , http://dx.doi.org/10.1016/j.jvs.2009.11.080, May, Epub 2010 Mar 29Brewster, D., Cambria, R., Moncure, A., Aortocaval and iliac arteriovenous fistulas: Recognition and treatment (1991) J Vasc Surg, 13, pp. 253-264. , http://dx.doi.org/10.1016/0741-5214(91)90218-J, discussion 264-5Cronin, B., Kane, J., Lee, W., Shriki, J., Weaver, F.A., Repair of a high-flow iliac arteriovenous fistula using a thoracic endograft (2009) J Vasc Surg., 49 (3), pp. 767-770. , http://dx.doi.org/10.1016/j.jvs.2008.10.062, Mar, Epub 2009 Jan 14Yared, K., Baggish, A.L., Wood, M.J., High-output heart failure resulting from a remote traumatic arteriovenous fistula (2009) Can J Cardiol., 25 (4). , http://dx.doi.org/10.1016/S0828-282X(09)70083-2, AprParodi, J., Barone, H., Transluminal treatment of abdominal aortic aneurysms and peripheral arteriovenous fistulas (1992) Proceedings of the 19th Annual Montefiore Medical Center Symposium on Current Critical Problems and New Techniques in Vascular Surgery, , In: 1992New York. New YorkSanchez, L., Veith, F., Ohki, T., Early experience with the Corvita endoluminal graft for the treatment of arterial injuries (1999) Ann Vasc Surg, 13, pp. 151-157. , http://dx.doi.org/10.1007/s100169900233Marin, M., Veith, F., Panetta, T., Transluminally placed endovascular stented graft repair for arterial trauma (1994) J Vasc Surg, 20, pp. 466-472. , http://dx.doi.org/10.1016/0741-5214(94)90147-3McCarter, D., Johnstone, R., McInnes, G., Reid, D., Pollock, J., Reid, A., Iliacarteriovenous fistula following lumbar disc surgery treated by percutaneousendoluminal stent grafting (1996) Br J Surg, 83, pp. 796-797. , http://dx.doi.org/10.1002/bjs.1800830622Zajko, A., Little, A., Steed, D., Curtiss, E., Endovascular stent-graft repair of common iliac artery-to-inferior vena cava fistula (1995) J Vasc Intervent Radiol, 6, pp. 803-806. , http://dx.doi.org/10.1016/S1051-0443(95)71190-3McLaughlin, V.V., McGoon, M.D., Pulmonary arterial hypertension (2006) Circulation, 114 (13), pp. 1417-1431. , http://dx.doi.org/10.1161/CIRCULATIONAHA.104.50354

Estudo de estratégias de controle de vazão de fluido de transferência de calor em campo solar em sistema híbrido

CIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia SolarRESUMO: Com a crescente demanda energética mundial cada vez mais é possível notar os avanços em estudos de aproveitamento de energía solar. Hoje em dia modelagens de sistemas térmicos híbridos de geração de energía por meio das tecnologías heliotérmicas tem sido muito desenvolvidas. O conceito em estudo do presente trabalho se trata de uma planta híbrida Ciclo Combinado Integrado a Sistema Solar (ICCSS, do inglês Integrated Combined Cycle Solar System) concebido para ser usado no aproveitamento de gás metano de aterro sanitário como fonte primária para o ciclo a gás e o campo solar suplementar para aumentar a geração do ciclo de vapor, aumentando assim a eficiência global do ciclo termodinâmico. Mais especificamente, estudo de estratégias de controle de vazão do Fluido de Transferência de Calor no campo solar da instalação foi abordado aqui. Por meio das simulações realizadas é possível concluir que as configurações têm desempenho semelhante sendo que a de vazão variável mais uniforme, o que pode representar uma vantagem.ABSTRACT: With the growing global energy demand, it is noticeable the advances in studies on the use of solar energy. Nowadays, modeling of hybrid thermal systems for power generation through concentrating solar power technologies has been increasingly developed. The concept under study in the present work is a hybrid plant Integrated Combined Cycle to Solar System (ICCSS, from the English Integrated Combined Cycle Solar System) designed to be applied in the use of landfill methane gas as the primary source for the gas cycle and the supplementary solar field to increase the generation of the steam cycle, thus increasing the overall efficiency of the thermodynamic cycle. More specifically, study of heat transfer fluid flow control strategies in the solar field of the installation is considered in the study. Through the simulations carried out, it is possible to conclude that the configuration has similar performance with variable thermal oil flow seems to be more uniform solar absorption throughout the year, which can be advantageous.info:eu-repo/semantics/publishedVersio

Evaluation of MTHFR C677T gene polymorphism and homocysteine level in coronary atherosclerotic disease

OBJECTIVE: The aim of this study is to determine the prevalence of C677T methylenetetrahydrofolate reductase (MTHFR) polymorphism and correlate it with plasma homocysteine levels in coronary artery disease (CAD). METHODS: Ninety-three patients with documented CAD from Hospital Universitário Oswaldo Cruz (Recife, PE, Brazil) and 108 healthy controls were evaluated. Homocysteine and folate levels were determined by HPLC and chemoluminescence, respectively, and lipid profile was considered. Genotyping was done by RFLP/PCR. RESULTS: The groups were homogeneous for the C677T polymorphisms. The homocysteine level in cases (11.7 µmol/L) was statistically different from that observed in controls (8.84 µmol/L, p< 0.05). It was also observed that 72% of the patients had homocysteine values above12 µmol/L while the control group presented only 32% in this range. There was no relationship between homozigosity for the C677T polymorphism and the homocysteine level (p= 0.634). We noticed statistical differences between folate levels from patients and controls (6.22 and 7.69 ng/dL, p< 0.05, respectively). However, there was no correlation between homocysteine and folate concentrations in the entire group (r= -0.202). Comparing cases and controls, the odds ratio (OR) when homocysteine is high and folate is low was OR= 11.9; CI 95%= 4.16-34.42, p< 0.01. CONCLUSION: A lack of correlation between C677T mutation and homocysteine level suggests that environmental factors and others genetic factors seem to exert more influence on homocysteine level in this population.OBJETIVO: O objetivo deste trabalho é determinar a prevalência do polimorfismo C677T do gene metilenotetraidrofolato redutase (MTHFR) e associá-la com a concentração plasmática de homocisteína plasmática na doença arterial coronariana (DAC). MÉTODOS: Foram avaliados 93 pacientes com DAC documentada, atendidos no Hospital Universitário Oswaldo Cruz (Recife, PE, Brasil), e 108 controles sem a doença. Foram determinados os perfis lipídicos de pacientes e controles. As concentrações plasmáticas de homocisteína e folato foram determinadas por HPLC e quimioluminescência, respectivamente. A genotipagem foi realizada por RFLP/PCR. RESULTADOS: Os grupos de pacientes e controles foram homogêneos quanto aos perfis genéticos do polimorfismo investigado. Nos pacientes, as concentrações plasmáticas médias de homocisteina (11,7 ± 4,4 µmol/L) e de folato (6,22 ± 3,0 ng/dL) foram estatisticamente diferentes daquelas observadas nos controles (8,84 ± 3,2 µmol/L e 7,69 ± 3,1 ng/dL, respectivamente), ao nível de significância de 0,05. Entretanto, não houve correlação entre concentração plasmática de homocisteína e folato nos pacientes (r= -0,202). Não foi observada associação entre a homozigosidade 677TT para MTHFR e a concentração plasmática de homocisteína sérica (p= 0,634). A comparação dos casos e controles que apresentaram simultaneamente alta concentração plasmática de homocisteína e baixa concentração de folato, resultou numa razão de chance superior à de cada variável analisada independentemente (RC= 11,9; IC 95%= 4,16-34,42, p< 0,01). CONCLUSÕES: A mutação C677T não parece ser um fator genético importante capaz de explicar a hiperhomocisteinemia moderada observada nos pacientes com DAC. Outros fatores, ambientais e genéticos, devem ser investigados.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Federal de São Paulo (UNIFESP) Departamento de Pediatria Laboratório de Erros Inatos de MetabolismoUniversidade de Pernambuco ICB Departamento de Ciências FisiológicasUniversidade de São Paulo Faculdade de Medicina de Ribeirão Preto Hospital das ClínicasUNIFESP, Depto. de Pediatria Laboratório de Erros Inatos de MetabolismoSciEL

FEASIBILITY STUDY OF HYBRID THERMOELECTRIC PLANTS USING CSP TECHNOLOGY AND FOSSIL FUEL: SIMULATION SCENARIOS

Due to the rapid advance in technology, a new generation of power plants has emerged: the concentrated solar power (CSP). It is a renewable energy system that can be combined with large-scale energy storage systems. CSP holds many promises for the countries with high direct solar radiation, as Brazil. However, there are many problems regarding the viability of these plants in the emerging countries such as high capital costs, lack of national technology and qualified professionals. Hybridization of existing power plants with solar energy could be a possible gateway for the technology deployment.&nbsp; This paper presents the technical and economic feasibility analysis of a steam super-heater plant powered by CSP for electricity production. Such hybridization permits the reduction of CO2 emissions and retrenchment in the long term. In this context, the performances of four different systems of thermoelectric power generation were compared: (i) solar reheating - superheated steam generated by boiler and it expansion in the first turbine using CSP for reheating second expansion turbine; (ii) solar superheater - generating saturated steam in a boiler and superheating it using CSP; (iii) supercritical solar heater - saturated steam production in a boiler and heating at supercritical steam in CSP and (iv) conventional cycle and CSP working in parallel.&nbsp; The direct irradiation data available at the Brazilian solar atlas were analyzed, looking for the best location of power plant installation. In addition to the solar resource data, other criteria as economic, environmental and availability of transmission lines were taken into account. The decision matrix with performance indicators helped in the decision-making process of location selection. Comparing to others scenarios the obtained results showed several advantages of scenario (iv) - conventional cycle and CSP working in parallel using solar power towers without thermal storage. Research result as well revealed Santa Maria da Vitória town, Bahia region, as a better place for plant construction using the selected scenario. The total capacity was determined to be 30 MWe in accordance with the incentives offered by 481/2012-ANEEL (Brazilian Agency) resolution. &nbsp; Keywords: Concentrated solar power (CSP); Solar irradiation data; Hybrid thermoelectric; Reheating vapor cycle

MTP -493G/T gene polymorphism is associated with steatosis in hepatitis C-infected patients

The reduction of hepatic microsomal transfer protein (MTP) activity results in fatty liver, worsening hepatic steatosis and fibrosis in chronic hepatitis C (CHC). The G allele of the MTP gene promoter, -493G/T, has been associated with lower transcriptional activity than the T allele. We investigated this association with metabolic and histological variables in patients with CHC. A total of 174 untreated patients with CHC were genotyped for MTP -493G/T by direct sequencing using PCR. All patients were negative for markers of Wilson&#8217;s disease, hemochromatosis and autoimmune diseases and had current and past daily alcohol intake lower than 100 g/week. The sample distribution was in Hardy-Weinberg equilibrium. Among subjects with genotype 1, 56.8% of the patients with fibrosis grade 3+4 presented at least one G allele versus 34.3% of the patients with fibrosis grade 1+2 (OR = 1.8; 95%CI = 1.3-2.3). Logistic regression analysis with steatosis as the dependent variable identified genotypes GG+GT as independent protective factors against steatosis (OR = 0.4, 95%CI = 0.2-0.8; P = 0.01). The results suggest that the presence of the G allele of MTP -493G/T associated with lower hepatic MTP expression protects against steatosis in our CHC patients

Estímulo no crescimento e na hidrólise de atp em raízes de alface tratadas com humatos de vermicomposto: ii - efeito da fonte de vermicomposto.

Um dos fatores mais limitantes para a produção de vermicomposto é a disponibilidade de esterco. Neste trabalho, foi avaliado o efeito da substituição parcial do esterco por bagaço de cana e por resíduos de leguminosa (Gliricidia sepium) na vermicompostagem sobre a qualidade do vermicomposto e sobre a bioatividade dos humatos, avaliadas por meio da análise do crescimento radicular e da atividade das bombas de H+ isoladas de raízes de alface. A substituição do esterco por bagaço de cana e por resíduos de leguminosas não acarretou prejuízo às características químicas dos vermicompostos. No entanto, os humatos isolados dos diferentes vermicompostos apresentaram características químicas distintas,tais como: acidez e propriedades óticas distintas. Os humatos produzidos a partir de esterco de bovino e da mistura esterco bovino + bagaço proporcionaram maiores estímulos no crescimento radicular das plantas de alface, sendo os mais indicados para uso na forma solúvel. A inclusão de resíduos de leguminosas no processo de vermicompostagem produziu humatos sem efeito sobre o desenvolvimento das raízes de alface