Yields
Mostrando 13-24 de 4322 artigos, teses e dissertações.
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13. Series Fed Designs of Planar Circular and Hexagonal Microstrip Antenna Arrays for High Gain and Reduced First Side Lobe Level Radiation
Abstract To achieve a high gain and low first side-lobe level, variants of linear and planar series fed circular and hexagonal microstrip antenna arrays using the binomial distribution, are proposed around 3000 MHz frequency band, on thinner Arlon substrate (h ~ 0.027λg). The linear 7 × 1 array of circular patches, yields first side-lobe level of −25 dB
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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14. The Influence of the Platinum Weight Percentage in the Catalyst Formulation on the Performance of a High Temperature Ethanol Electroreformer Based on H3PO4 Doped Polybenzimidazole for Green Hydrogen Production
A vapor-fed high temperature proton exchange ethanol electroreformer has been developed based on the use of a H3PO4-doped polybenzimidazole membrane to produce green hydrogen. As a key parameter, this article describes the influence of platinum weight percent (wt.%) in the catalyst formulation from different commercial catalysts (20, 40, 60, 80 wt.% Pt/C and
Journal of the Brazilian Chemical Society. Publicado em: 2022
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15. Vinasse improves soil quality and increases the yields of soybean, maize, and pasture
RESUMO A vinhaça pode ser uma alternativa adequada para melhorar os atributos do solo e aumentar a produtividade das culturas. Este estudo avaliou o efeito da vinhaça fresca e concentrada nos atributos químicos e biológicos do solo e na produtividade da soja, milho e pastagem. O delineamento foi em blocos ao acaso com quatro repetições e cinco tratamen
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2022
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16. Hole spacing in soybean hill drop sowing1
ABSTRACT The aim of this study was to evaluate the development, yield and its components of soybean sown in hill drop method with variation in hole spacing, compared to the conventional sowing method in lines. The experiment was conducted in a randomized block design, with six treatments and four replications, using the variety M7739 RR IPRO with four plans
Rev. Ceres. Publicado em: 2021-08
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17. “A LIVING MOSAIC OF HUMAN BEINGS”: THE LIFE WRITING OF VIRGINIA WOOLF AND ZITKALA-ŠA
Abstract This essay examines life writing by English author Virginia Woolf (1882-1941) and Yankton Dakota writer Zitkala-Ša (1876-1938), specifically Woolf’s memoir, “A Sketch of the Past,” written in 1939-40 and first published in Moments of Being in 1976, and Zitkala-Ša’s autobiographical essays, published in the Atlantic Monthly in 1900. This co
Ilha Desterro. Publicado em: 2021-08
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18. Elemental Chalcogen (Se, S) in PEG-400 to the Synthesis of Seleno- and Thioflavones from 2-Chlorophenyl Ethynyl Ketone and Nucleophilic Species of Chalcogen
An alternative green method was developed for the synthesis of thio-and selenoflavones by the ring closure of 2-chlorophenyl ethynyl ketone with NaHY (Y = S, Se). These nucleophilic chalcogen species were generated in situ using NaBH4 to reduce the elemental chalcogen in the presence of polyethylene glycol-400 (PEG-400). The efficiency of this reaction is st
J. Braz. Chem. Soc.. Publicado em: 2021-08
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19. Synthesis of Triazoles by Electro-Assisted Click Reaction Using a Copper Foil Electrode
This paper presents an innovative pathway for the synthesis of triazoles using the well-known “click chemistry” assisted by the electrochemical oxidation of metallic Cu0. The click reaction is used to couple a wide range of biological interest compounds. In this case, faster and less polluting methods for a biological environment was achived by in situ C
J. Braz. Chem. Soc.. Publicado em: 2021-07
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20. Essential Oils Obtained from Aerial Eugenia punicifolia Parts: Chemical Composition and Antiproliferative Potential Evidenced through Cell Cycle Arrest
Essential oils (EOs) of the leaves of three Eugenia punicifolia specimens from two different Reservation Parks, namely Parque Nacional das Nascentes do Rio Parnaíba (EpNRP-I and EpNRP-II) and Parque Nacional da Chapada das Mesas (EpCM), in the state of Maranhão, Brazil, were extracted by hydrodistillation and investigated by gas chromatography coupled to m
J. Braz. Chem. Soc.. Publicado em: 2021-07
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21. Erectile function after partial penectomy for penile cancer
ABSTRACT Purpose: To evaluate the erectile function in patients who underwent partial penectomy and identify factors associated with penile functional status. Materials and Methods: We identified patients who underwent partial penectomy due to penile cancer between 2009 and 2014. Clinical and pathological characteristics included patient age at the time of
Int. braz j urol.. Publicado em: 2021-06
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22. Re-do Boari flap for recurrent ureteric stricture
ABSTRACT Purpose: To evaluate the erectile function in patients who underwent partial penectomy and identify factors associated with penile functional status. Materials and Methods: We identified patients who underwent partial penectomy due to penile cancer between 2009 and 2014. Clinical and pathological characteristics included patient age at the time of
Int. braz j urol.. Publicado em: 2021-06
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23. Design, Synthesis and Antifungal Activity of New Schiff Bases Bearing 2-Aminothiophene Derivatives Obtained by Molecular Simplification
Seventeen Schiff bases bearing 2-aminothiophene derivatives were designed and synthesized using molecular simplification. The resulting compounds (4a-4q) were evaluated for their in vitro antifungal activity against dermatophytes. Prediction of their druglikeness and pharmacokinetic properties, establishment of their structure-activity relationships (SAR), a
J. Braz. Chem. Soc.. Publicado em: 2021-05
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24. Thermal and Catalytic Fast Pyrolysis of Oily Extracts of Microalgae: Production of Biokerosene
Three different microalgae species, Desmodesmus sp., Nannochloropsis oculata and Halamphora coffeaeformis were grown under controlled conditions. The resulting dry biomass was characterized by TG-DTA (thermogravimetry-differential thermal analysis) and extracted with three solvents having different polarities. The extracts gross mass yields varied from 2% us
J. Braz. Chem. Soc.. Publicado em: 2021-04