Características da inflorescência de cultivares de coqueiro nas épocas seca e chuvosa do ano.

bitstream/CPATC/19568/1/bp-21.pdfISSN 1678-1961

Subsídios técnicos para a produção e comercialização de sementes certificadas do coqueiro.

Discute produção de sementes de coqueiro, auxiliando o Ministério da Agricultura e Abastecimento no processo de certificação, auxiliar os produtores de coco na aquisição de sementes de coco, auxilia no controle do comércio clandestino de sementes de coqueiro além de outras assuntos.bitstream/item/46722/1/CPATC-DOCUMENTOS-10-SUBSIDIOS-TECNICOS-PARA-A-PRODUCAO-E-COMERCIALIZACAO-DE-SEMENTES-CERTIFICADAS.pd

Effect of physical exercise on lipid metabolism in the elderly

PURPOSE: To assess the effect of regular physical exercise on plasma lipids and apoproteins in an elderly group. MATERIAL AND METHODS: Sixty-three old people of both sexes, aged between 65 and 94, were randomly distributed between a test group (n = 31) and a control group (n = 32). The test group followed a program of physical exercise for eight months, with intensity of 60% to 80% of heart rate reserve, consisting of three weekly sessions, on alternate days, of 60 minutes each. Before the beginning of the program and eight months afterwards, blood samples were collected to assess total cholesterol, triglycerides, HDL-C, HDL2-C. HDL3-C, apo A1, apo B-100 and apo (a). The ratios total cholesterol/HDL-C, LDL-C/HDL-C, HDL2-C/HDL3-C and apo A1/apo B-100 were also calculated. RESULTS: In the test group total cholesterol, triglycerides, LDL-C, apo B-100, total cholesterol/HDL-C and LDL-C/HDL-C decreased significantly; HDL-C, HDL2-C, apo A1, HDL2-C/HDL3-C and apo A1/apo B-100 increased significantly; HDL3-C and apo (a) did not change. The control group did not present any significant alterations in any of the parameters assessed. CONCLUSIONS: Regular physical exercise decreases vascular risk and may help to reduce cardiovascular events in the elderly

Real Time Analysis of Thermal Activation via Sphaleron Transitions

We study the process of thermal activation mediated by sphaleron transitions by analyzing the real-time dynamics of the decay out of equilibrium in a $1+1$ dimensional field theory with a metastable state. The situation considered is that of a rapid supercooling in which the system is trapped in a metastable state at a temperature larger than the mass of the quanta, but smaller than the energy to create a critical droplet. The initial density matrix is evolved in time and the nucleation rate (probability current at the saddle point) is computed. The nucleation rate is {\it time dependent}, vanishing at early times, reaching a maximum at a time $t \approx 1/m$ with $m$ the mass of quanta in the metastable state, and decreasing at long times as a consequence of unitarity. An estimate for the average number of particles of ``true vacuum'' produced as a function of time during the nucleation process is obtained.Comment: 26 pages 6 figures (available upon request), PITT-93-06, LATE

Síndrome hipertensiva hiponatrémica em destaque – um caso clínico

Descrita pela primeira vez em 1952, a síndrome hipertensiva hiponatrémica (SHH) é a combinação de hipertensão severa, hiponatremia e isquémia renal. Mais do que rara, a síndrome é principalmente subdiagnosticada. Isto limita o conhecimento real e completo da sua fisiopatologia e jus_fica a inexistência de estudos aleatorizados prospe_vos com avaliação real de opções terapêu_cas. A necessidade de aumentar a consciencialização para a síndrome por parte da comunidade médica é premente, especialmente se _vermos em consideração que é uma síndrome potencialmente curável e com taxas de mortalidade que chegam aos 25% nos adultos. Assim, apresenta-se um caso de SHH, com necessidade de nefrectomia para controlo e tratamento definitivo da síndrome.info:eu-repo/semantics/publishedVersio

Observables in Topological Yang-Mills Theories

Using topological Yang-Mills theory as example, we discuss the definition and determination of observables in topological field theories (of Witten-type) within the superspace formulation proposed by Horne. This approach to the equivariant cohomology leads to a set of bi-descent equations involving the BRST and supersymmetry operators as well as the exterior derivative. This allows us to determine superspace expressions for all observables, and thereby to recover the Donaldson-Witten polynomials when choosing a Wess-Zumino-type gauge.Comment: 39 pages, Late

The Exact Critical Bubble Free Energy and the Effectiveness of Effective Potential Approximations

To calculate the temperature at which a first-order cosmological phase transition occurs, one must calculate $F_c(T)$, the free energy of a critical bubble configuration. $F_c(T)$ is often approximated by the classical energy plus an integral over the bubble of the effective potential; one must choose a method for calculating the effective potential when $V''<0$. We test different effective potential approximations at one loop. The agreement is best if one pulls a factor of $\mu^4/T^4$ into the decay rate prefactor [where $\mu^2 = V''(\phi_f)$], and takes the real part of the effective potential in the region $V''<0$. We perform a similar analysis on the 1-dimensional kink.Comment: 11 pages plus 3 figures in jyTeX; CALT-68-188

Ação de aminoácidos de peixe na germinação e desenvolvimento de plântulas de melancia.

Suplemento. Edição dos Trabalhos do 50. Congresso Brasileiro de Olericultura, Guarapari, jul. 2010

Alguns aspectos metodológicos da medida da excreção de matéria orgânica pelo fitoplâncton por espectrometria de cintilação líquida

Some aspects of the procedures to measure dissolved organic matter (DOM) released by phytoplankton account for important sources of errors. These aspects include: cell damage upon filtration of samples, residual inorganic 14C in the filtrates, NaH14CO3 ampoule contaminations and the low radiation activity proper to the released samples. Some experiments on these procedural problems were carried out and their effects on the released DOM were evaluated. A procedure to use control samples to avoid errors in the technique of DOM analysis by the liquid cintillation counter is described. Experiments on the validity of stocking preserved filtrates of natural plankton populations and algal cultures were also carried out for long periods prior to the radioactivity measurements

Multiflavor Correlation Functions in non-Abelian Gauge Theories at Finite Density in two dimensions

We compute vacuum expectation values of products of fermion bilinears for two-dimensional Quantum Chromodynamics at finite flavored fermion densities. We introduce the chemical potential as an external charge distribution within the path-integral approach and carefully analyse the contribution of different topological sectors to fermion correlators. We show the existence of chiral condensates exhibiting an oscillatory inhomogeneous behavior as a function of a chemical potential matrix. This result is exact and goes in the same direction as the behavior found in QCD_4 within the large N approximation.Comment: 28 pages Latex (3 pages added and other minor changes) to appear in Phys.Rev.