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Waste generation in agate processing : use of SiO2 as a support matterial [sic] for Fe3O4
(2015) [Artículo de periódico]Brazil is one of the main producers of colored gemstones, and Rio Grande do Sul is the state with the greatest production of agates, amethysts and citrines. This sector is preponderant in the economy of the regions of the ... -
Waste glass in porcelain
(2005) [Artículo de periódico]In this work, the feldspar used as a flux in typical porcelain was replaced by waste glass, and the resulting batch composition contained 50% kaolin, 25% quartz and 25% waste glass. The properties of this porcelain with ... -
Wastewater treatment in a pilot-scale submerged membrane bioreactor : study of hydrodynamics under constant operating pressure
(2018) [Artículo de periódico]A pilot-scale Submerged Membrane Bioreactor provided with PEI hollow fiber membranes was operated under constant pressure mode in order to evaluate the effects of hydrodynamic conditions on the process performance, such ... -
Water dynamics, phytoplankton biomass and size structure of a shalow freshwater subtropical lake (Itapeva Lake, South of Brazil)
(2004) [Artículo de periódico]Regular tools used to characterize the phytoplankton community structure are taxonomic composition, diversity of species and the classification of organisms according to their size. The main objective of this study was to ... -
Water-food-energy nexus tradeoffs in the São Marcos river basin
(2021) [Artículo de periódico]Given its potentialities and characteristics, energy generation, food production, and water availability have a strong interdependency and correlation. Water is needed to produce energy and food, while energy is required ... -
Water hyacinth composting as a waste management strategy : a systematic review
(2022) [Artículo de periódico]Macrophytes proliferation problem is worldwide know resulting in impacts on natural environment, human health and economic activities. These organisms have several parameters resilience, which ensures high rate of reproduction ... -
Water quality assessment of the Sinos River, Southern Brazil
(2010) [Artículo de periódico]A Bacia Hidrográfica do Rio dos Sinos localizada a nordeste do Estado do Rio Grande do Sul, entre as coordenadas geográficas de 29° 20’ a 30°10’ de latitude Sul e de 50° 15’ a 51° 20’ de longitude Oeste. As províncias ... -
Water storage variability across Brazil
(2022) [Artículo de periódico]Brazil hosts a large amount of freshwater. Knowing how this stored water is partitioned in space and time between surface and subsurface components is a crucial step towards a more correct depiction of the country’s water ... -
Wave length and celerity downstream from a hydraulic jump
(2019) [Artículo de periódico]It allows the estimation of other important wave characteristics such as the length and celerity. This study aims at describing the results of a relationship among the significant, mean, and peak periods of waves generated ... -
WaveMIMO methodology : numerical wave generation of a realistic sea state
(2021) [Artículo de periódico]This paper presents a methodology that allows the numerical simulation of realistic sea waves, called WaveMIMO methodology, which is based on the imposition of transient discrete data as prescribed velocity on a finite ... -
Wear behaviour of electroless heat treated Ni-P coatings as alternative to electroplated hard chromium deposits
(2017) [Artículo de periódico]In this present study was evaluated the influence of heat treatment on the wear resistance of electroless high phosphorus nickel coating (9-10% P wt.). In addition, both untreated and treated Ni-P deposits were then compared ... -
Welding cooling rate effects on microstructure of an API 5l x100 steel
(2016) [Artículo de periódico]The aim of this work was to investigate the influence of five different cooling rates on properties of weld metal (WM) and heat affected zone (HAZ) of an API 5L X100 steel welded by GMAW. Bead on pipe (BOP) welds were made ... -
Wind tunnel experiments with neutral and convective boundary layer stabilities
(2018) [Artículo de periódico]The present contribution reports on the status of the STROMA experiment. As a novelty a new experimental setup in a wind tunnel allows to simulate different stability regimes with vertical heat flux in either direction. ... -
Wood-poly(furfuryl alcohol) prepreg : a novel, ecofriendly laminate composite
(2023) [Artículo de periódico]Prepregs are commonly fabricated with non-renewable petroleum-based materials. To reduce the impact of the manufacturing of these materials and to produce more sustainable prepregs, this research aims to manufacture ... -
Woody debris characterization in a small basin with araucaria forest
(2021) [Artículo de periódico]The effect that wood deposited in a river, woody debris (WD), causes on its hydrogeomorphic processes depends on the dimensions of the wood and the channel. Studies related to WD are still very rare in Brazil. Therefore, ... -
Zinc layered hydroxide salts : intercalation and incorporation into low-density polyethylene
(2014) [Artículo de periódico]In this study, polymer composites using low-density polyethylene (LDPE) and layered hydroxide salts (LHS) were synthesized. The following compositions of LHS were obtained Zn5(OH)8(An-)2/n.yH2O, where A was varied in order ... -
Zinc oxide nanoparticles from microwave-assisted solvothermal process : photocatalytic performance and use for wood protection against xylophagous fungus
(2019) [Artículo de periódico]Nano- and micro-oxides are promising materials due to several interesting characteristics such as photocatalytic and antimicrobial role. In this work, zinc oxide nanorods were obtained by microwave-assisted solvothermal ...
