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Mostrando 1-12 de 680 artigos, teses e dissertações.
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1. Technological properties of a self-bloating clay and expanded-clay aggregate for the production of lightweight concrete
Abstract The global interest in an increasingly sustainable economy, with a reduction in the consumption of raw materials and energy, can be supported by the growth in the use of lightweight concrete (LC) produced with expanded-clay aggregates (EA). The main qualities of natural self-bloating clay for the production of EA were studied, analyzing the paramete
Cerâmica. Publicado em: 2023
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2. Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system
Abstract Nanostructured crystalline composite (activated carbon) was synthesized from residual ashes of the burning process of the sludge generated in the flotation step of a poultry slaughterhouse and was used for Allura red dye adsorption. The ashes were chemically activated using two types of reagents, H2O2 and H3PO4, and the structure, morphology, and su
Cerâmica. Publicado em: 2022
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3. Performance analysis of the beneficiation process of bauxite from the Juruti Mine. Industrial sampling and performance evaluation
Abstract Sampling campaigns were conducted at the industrial bauxite wash circuit of the Juruti Bauxite Mine in Pará, Brazil. The beneficiation circuit consisted of crushing, scrubber washing, wet screening, hydrocyclone classification, and fltration. Considering laboratory processing of samples and statistical analyses of historical operation databases, ma
REM - International Engineering Journal. Publicado em: 2022
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4. Percutaneous and endoscopic combined treatment of bladder and renal lithiasis in mitrofanoff conduit
ABSTRACT Introduction and Objectives: Treatment of bulky lithiasis in continent and non-continent urine storage reservoirs has been widely described and debated (1). Less is known about the optimal treatment in patients with a Mitrofanoff conduit. If voiding in these patients is incomplete, leading to recurrent symptomatic bacteriuria, formation of large li
International braz j urol. Publicado em: 2022
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5. Morphology Behavior of Copper Films Deposited after Wet Surface Treatment on Polished Alumina
In this paper, a pre-treatment process for electroless copper (Cu) deposition on the polished alumina (Al2O3) 99.9% and the behavior of Cu plating by electroless process after Al2O3 surface treatment were explored. Our work was carried out by changing the roughness of Al2O3 through micro-etching (coarsening), nucleation its surface by a two-step method (sens
Journal of the Brazilian Chemical Society. Publicado em: 2022
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6. Corporoplasty: A simplified technique for clitoroplasty
ABSTRACT Introduction Clitoroplasty constitutes an important step in feminizing surgery for congenital adrenal hyperplasia (CAH) ( 1 ). In this video we present a technique that aims to preserve clitoral sensitivity and engorgement while minimizing the risk of neurovascular lesion. Materials and methods We present a video of a three-year-old girl with hi
International braz j urol. Publicado em: 2022
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7. High uterosacral ligament hysteropexy for the management of pelvic organ prolapse
ABSTRACT Objective: To demonstrate our transvaginal high uterosacral ligament (HUL) hysteropexy technique as an alternative mesh-free uterine-preserving pelvic organ prolapse (POP) repair approach and present our institutional outcomes. Concurrent hysterectomy with POP repair is controversial as uterine-preserving techniques may beneficially allow fertility
Int. braz j urol.. Publicado em: 2021-08
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8. Three-dimensional printing models of horseshoe kidney and duplicated pelvicalyceal collecting system for flexible ureteroscopy training: a pilot study
ABSTRACT Objective: To demonstrate our transvaginal high uterosacral ligament (HUL) hysteropexy technique as an alternative mesh-free uterine-preserving pelvic organ prolapse (POP) repair approach and present our institutional outcomes. Concurrent hysterectomy with POP repair is controversial as uterine-preserving techniques may beneficially allow fertility
Int. braz j urol.. Publicado em: 2021-08
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9. Complete corporeal preservation clitoroplasty: new insights into feminizing genitoplasty
ABSTRACT Introduction: 46,XX Congenital adrenal hyperplasia (CAH) remains the first cause of genital virilization and current surgical techniques aim to restore female aspect of genitalia while preserving dorsal neurovascular bundle but not at the expense of not preserving erectile tissue. We aim to report our experience with a new surgical technique for cl
Int. braz j urol.. Publicado em: 2021-08
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10. Cold sintering and electric characterization of ZnO-BaTiO3 composites
Abstract The sintering is an essential step in the processing of ceramics materials. A number of researchers have reported new techniques for sintering. However, in general, the process still demands high temperatures. This paper reports the results of the cold sintering of ZnO-BaTiO3 composites. The microstructural, structural, and electric properties of th
Cerâmica. Publicado em: 2021-03
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11. Reordering of Depolymerized Silicates as Adsorbents for Large Nitrogen Compounds
The adsorption capacities of two synthesized zeolites (crystalline ZSM-5 and semi-crystalline faujasite Y) for a mixture of indole, quinoline and carbazole were studied. The different samples obtained show different crystalline degree, mesoporosity and Si/Al ratios. The synthesis procedure is based on the simultaneous depolymerization of a mixture of high su
J. Braz. Chem. Soc.. Publicado em: 2021-01
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12. Construção de equipamento de baixo custo para enrolar filamentos de impressoras 3D
The increase in demand for both fast and inexpensive prototyping of objects, with a certain degree of resilience and durability, is the main reason why 3D printing has become part of the concept of industry 4.0 and it is omnipresent in research facilities and industries around the world. In this work, we describe step-by-step the construction process of a fi
Quím. Nova. Publicado em: 2020-04