Avaliação agronômica de seis híbridos de sorgo (Sorghum bicolor (L.) Moench).

Foram determinadas as produções de matéria seca (MS) e de matéria natural (MN), as proporções de colmo, folhas e panícula em seis híbridos de sorgo, em plantas com o grão em estádio leitoso/pastoso. Usou-se um delineamento inteiramente ao acaso, com quatro repetições por tratamento (híbrido). A altura dos híbridos variou de 1,0 a 2,7m e a correlação entre altura da planta e porcentagem de acamamento foi de 0,27. A porcentagem de MS do colmo variou de 20,8 a 29,4 e a correlação entre MS no colmo e altura da planta foi de 0,31. Altura e porcentagem de MS do colmo não influenciaram o percentual de acamamento. A produção de MS variou de 4,47 a 7,86 t/ha e a de MN de 13,4 a 31,1 t/ha. A porcentagem de colmo variou de 40,5 a 67%, a de folhas de 12,1 a 21,6%, e a de panícula de 20,9 a 40,6%. Os híbridos de maior produção foram os de maior altura. Houve diferenças significativas entre os tipos de sorgo quanto a matéria seca do colmo e altura da planta, porém essas variáveis não influenciaram o percentual de acamamento das diversas variedades de sorgo. O híbrido BRS701 destacou-se pela altura, baixo percentual de acamamento, elevado teor de matéria seca do colmo, elevada proporção de panícula e produção de MS

Synthesis and reactivity of a 1,4-dihydropyrazine derivative

N,N-Bis-(tert-butoxycarbonyl)-2,5-bis-methoxycarbonyl-1,4-dihydropyrazine can be obtained in high yield by treatment of the methyl ester of N-(4-toluenesulfonyl)-N-(tert-butoxycarbonyl)-alpha,beta-didehydroalanine with dimethylaminopyridine and potassium carbonate. This compound was used as substrate in Michael addition reactions with several types of nucleophiles. The electrochemical behaviour of this pyrazine derivative was also studied by cyclic voltammetry and by controlled potential electrolysis.We wish to thank the Fundação para a Ciência e a Tecnologia for financial support (project no. POCTI/1999/QUI/32689)

Lorentz-violating contributions of the Carroll-Field-Jackiw model to the CMB anisotropy

We study the finite temperature properties of the Maxwell-Carroll-Field-Jackiw (MCFJ) electrodynamics for a purely spacelike background. Starting from the associated finite temperature partition function, a modified black body spectral distribution is obtained. We thus show that, if the CMB radiation is described by this model, the spectrum presents an anisotropic angular energy density distribution. We show, at leading order, that the Lorentz-breaking contributions for the Planck's radiation law and for the Stefan-Boltzmann's law are nonlinear in frequency and quadratic in temperature, respectively. Using our results, we set up bounds for the Lorentz-breaking parameter, and show that Lorentz violation in the context of the MCFJ model is unable to yield the known CMB anisotropy (of 1 part in $10^{5})$

The prognostic value of abnormal coagulation times in dogs that are at the risk of developing sepsis

Introduction: Sepsis is a hard to define syndrome associated with a deleterious systemic inflammatory response that ultimately leads to coagulopathy, organ dysfunction, and death. The primary aim of this prospective study was to evaluate if coagulation times can be predictive of disease severity and outcome in patients at risk of developing sepsis.A secondary objective was to correlate activated partial thromboplastin time (aPTT) and prothrombin time (PT) with the quick sequential organ failure assessment (qSOFA) scoring system at the moment of admission to the intensive care unit (ICU) and evaluate their combined prognostic value. The main hypothesis of the study was: Are aPTT and PT correlated with disease severity and outcome, when associated with the qSOFA score, at the moment of admission to the ICU? Methods: A total of 43 dogs were prospectively enrolled in the study between September 2016 and March 2017. Patients that were hemodynamically altered with clinical signs of coagulopathy, infection, shock, or SIRS were included, as well as those affected by polytrauma, organ dysfunction, or neoplasia, upon presentation. These patients had at least one of these clinical signs but some had more than one. Regarding the presence of coagulopathies, all alterations in coagulation times were included. All these patients were susceptible to subclinical infections and bacterial translocation, therefore being at risk of developing sepsis. Coagulation testing and qSOFA scoring were performed at the time of admission to the ICU and were statistically analyzed using tests such as Chi-square tests, T-tests, ANOVA, HSD tests, and Pearson correlation coefficient tests. Other variables such as signalment, diagnosis, duration of hospitalization and post-discharge treatment and outcome were also recorded and analyzed. Results: Mortality rate was 34.9%. Mortality increased with the number of qSOFA points (0 points: 10%; 1 point: 30.8%; 2 points: 47.1%; 3 points: 66.7%). The aPTT was significantly higher (p = 0.029) in patients with a qSOFA score of 2 points in comparison to those with 1 point. A positive correlation was found between aPTT and PT (r = 0.406, n = 43, p = 0.005). Mean values for aPTT and PT were similar between surviving and non-surviving patients. Ten out of 15 patients (66.7%) that died did so between the first and fifth day of treatment, and 3 of the remaining 5 deaths (60%) were caused by neoplastic disease. Causes of dead included gastrointestinal disease, infectious disease,urinary tract disease, trauma, autoimmune disease, neurological disorder and neoplasia. Conclusions: The results of this study suggest the existence of hemostatic dysfunction amongst patients with a qSOFA score of 2 points. In isolation, however, prolonged coagulation times at ICU admission were not predictive of outcome

A higher dimensional fractional Borel‐Pompeiu formula and a related hypercomplex fractional operator calculus

In this paper, we develop a fractional integro-differential operator calculus for Clifford-algebra valued functions. To do that we introduce fractional analogs of the Teodorescu and Cauchy-Bitsadze operators and we investigate some of their mapping properties. As a main result, we prove a fractional Borel-Pompeiu formula based on a fractional Stokes formula. This tool in hand allows us to present a Hodge-type decomposition for the fractional Dirac operator. Our results exhibit an amazing duality relation between left and right operators and between Caputo and Riemann-Liouville fractional derivatives. We round off this paper by presenting a direct application to the resolution of boundary value problems related to Laplace operators of fractional order.info:eu-repo/semantics/publishedVersio