Isolamento, grupo de compatibilidade e crescimento micelial de Phytophthora sp. da pupunha.

Resumo

Detecção de Sclerotium rolfsii em sementes e sua patogenicidade em mudas de palmeira real.

bitstream/item/39827/1/CT273.pd

Parental Assistance on Electronic Interactive Games (Games) for Children Aged 3-6 Years During Learn From Home

The objectives of this study include: to find out whether Tangram Media Against Children’s Cognitive Ability to Recognize Geometry Shapes. The research method that researchers use is a quantitative method. This research is included in the regression research. From the results of the research conducted, the following results were obtained: Tangram media had an effect on the ability to recognize geometric shapes. Which is marked by the increase in the result of childrens’s learning tests in stage 2, namely at the post test stage, as well as the results obtained from the coefficient table which shows Y = 57,725 + 1,121. A cobstant of 57,725 states that if there is not tangram media the ability to recognize children’s geometric shapes of 57,725 states that if there is no tagram media has a positive positive effect on the ability to recognize geometric shapes,meaning that the better the learning media, the greater or better the ability to recognize geometric shapes. The independent variable (Vx) has an effect of 0.585 or 58.5 % on the dependent variable (Vy) and the rest is influenced by other variables not discussed in this study. What can be interpreted also that the tangram media has an effect of 0.585 or 58.5% on the ability to recognize geometric shapes. &nbsp

Coleção de fungos patogênicos de espécies florestais.

EVINCI. Resumo

A test of the standard dark matter density evolution law using galaxy clusters and cosmic chronometers

In this letter, we implement a test of the standard law for the dark matter density evolution. For this purpose, only a flat universe and the validity of the FRW metric are assumed. A deformed dark matter density evolution law is considered, given by $\rho_c(z) \propto (1+z)^{3+\epsilon}$, and constraints on $\epsilon$ are obtained by using galaxy cluster gas mass fractions, and cosmic chronometers measurements. We find that $\epsilon =0$ within 2$\sigma$ c.l., in full agreement with other recent analyses.Comment: 6 Pages and 3 figure

Detecção de fungos em sementes de cedro (Cedrella fissilis Vell), procedentes de Santa Catarina e São Paulo.

Resumo

Temperature dependence of the resistance of metallic nanowires (diameter ≥\geq 15 nm): Applicability of Bloch-Gr\"{u}neisen theorem

We have measured the resistances (and resistivities) of Ag and Cu nanowires of diameters ranging from 15nm to 200nm in the temperature range 4.2K-300K with the specific aim to assess the applicability of the Bloch-Gr\"{u}neisen formula for electron phonon resistivity in these nanowires. The wires were grown within polymeric templates by electrodeposition. We find that in all the samples the resistance reaches a residual value at T=4.2K and the temperature dependence of resistance can be fitted to the Bloch-Gr\"{u}neisen formula in the entire temperature range with a well defined transport Debye temperature ($\Theta_{R}$). The value of Debye temperature obtained from the fits lie within 8% of the bulk value for Ag wires of diameter 15nm while for Cu nanowires of the same diameter the Debye temperature is significantly lesser than the bulk value. The electron-phonon coupling constants (measured by $\alpha_{el-ph}$ or $\alpha_{R}$) in the nanowires were found to have the same value as that of the bulk. The resistivities of the wires were seen to increase as the wire diameter was decreased. This increase in the resistivity of the wires may be attributed to surface scattering of conduction electrons. The specularity p was estimated to be about 0.5. The observed results allow us to obtain the resistivities exactly from the resistance and gives us a method of obtaining the exact numbers of wires within the measured array (grown within the template).Comment: 9 pages, 10 figure

Al/Ga-Doped Li7La3Zr2O12 Garnets as Li-Ion Solid-State Battery Electrolytes: Atomistic Insights into Local Coordination Environments and Their Influence on 17O, 27Al, and 71Ga NMR Spectra.

Li7La3Zr2O12 (LLZO) garnets are among the most promising solid electrolytes for next-generation all-solid-state Li-ion battery applications due to their high stabilities and ionic conductivities. To help determine the influence of different supervalent dopants on the crystal structure and site preferences, we combine solid-state 17O, 27Al, and 71Ga magic angle spinning (MAS) NMR spectroscopy and density-functional theory (DFT) calculations. DFT-based defect configuration analysis for the undoped and Al and/or Ga-doped LLZO variants uncovers an interplay between the local network of atoms and the observed NMR signals. Specifically, the two characteristic features observed in both 27Al and 71Ga NMR spectra result from both the deviations in the polyhedral coordination/site-symmetry within the 4-fold coordinated Li1/24d sites (rather than the doping of the other Li2/96h or La sites) and with the number of occupied adjacent Li2 sites that share oxygen atoms with these dopant sites. The sharp 27Al and 71Ga resonances arise from dopants located at a highly symmetric tetrahedral 24d site with four corner-sharing LiO4 neighbors, whereas the broader features originate from highly distorted dopant sites with fewer or no immediate LiO4 neighbors. A correlation between the size of the 27Al/71Ga quadrupolar coupling and the distortion of the doping sites (viz. XO4/XO5/XO6 with X = {Al/Ga}) is established. 17O MAS NMR spectra for these systems provide insights into the oxygen connectivity network: 17O signals originating from the dopant-coordinating oxygens are resolved and used for further characterization of the microenvironments at the dopant and other sites.-EPSRC,Grant No: EP/P003532/1 -DFG, Research Fellowship GR 5342/1-1 -EPSRC iCASE (Award No:1834544) -Royal Society Professorship(RP\R1\180147) -Resources by the "Cambridge Service for Data Driven Discovery" (CSD3, http://csd3.cam.ac.uk) system operated by the University of Cambridge Research Computing Service funded by EPSRC Tier-2 capital grant EP/P020259/1. -Resources from the ARCHER UK National Computing Service, funded by the EPSRC (EP/P003532/1)