Percolation
Mostrando 1-12 de 179 artigos, teses e dissertações.
-
1. Detection of seepage paths in small earth dams using the self-potential method (SP)
Abstract The application of geoelectric methods, such as induced polarization (IP), the electrical resistivity and the self-potential (SP), presents an important indirect study methodology in several areas of geology, such as mining, geotechnics and environmental geology. The present study deals with the results of the application of the self-potential metho
REM, Int. Eng. J.. Publicado em: 2020-09
-
2. Potencialidade dos pavimentos permeáveis na melhoria da qualidade da água do escoamento superficial: uma revisão
Resumo O escoamento superficial pode acarretar em enchentes urbanas e no aumento da carga de poluentes de corpos d’água. O aumento da carga de poluentes é devido ao fato de o escoamento superficial percorrer sobre pavimentos e calçadas e, dessa forma, transportar os poluentes depositados nesses locais. A percolação do escoamento superficial nos pavim
urbe, Rev. Bras. Gest. Urbana. Publicado em: 21/02/2019
-
3. Development of Poly (butylene adipate-co-terephthalate) Filled with Montmorillonite-Polypyrrole for Pressure Sensor Applications
A novel pressure sensing material composed of poly (butylene adipate-co-terephthalate) (PBAT) and montmorillonite-polypyrrole (Mt-PPy) was prepared using melt mixing and injection molding. The structure and properties of the PBAT/Mt-PPy composites were evaluated and compared with those of the PBAT/PPy blends. The PBAT/Mt-PPy displays a very sharp insulator-c
Mat. Res.. Publicado em: 17/01/2019
-
4. Phenolic content and antibacterial activity of extracts of Hamelia patens obtained by different extraction methods
Abstract Hamelia patens, is a plant traditionally used to treat a variety of conditions among the Huastec people of Mexico. The objective of this study is to characterize the phenolic content and critically examine the antimicrobial activity of leaf extracts H. patens, obtained by maceration, Soxhlet and percolation, using ethanol as 70% solvent. Phenolic co
Braz. J. Microbiol.. Publicado em: 2018-09
-
5. Effect of Preparation Method on the Electrical and Mechanical Properties of PVC/Carbon Nanotubes Nanocomposites
The biggest challenge for the development of carbon nanotubes polymeric nanocomposites is in the suitable dispersion and distribution of the nanometric particles along the polymer matrix. Several preparation methods have been used to obtain nanocomposites, highlighting the mixture with polymer solution followed by solvent evaporation and the hot compacting.
Mat. Res.. Publicado em: 02/08/2018
-
6. Electrical, Thermal and Mechanical Properties of Epoxy/CNT/Calcium Carbonate Nanocomposites
Epoxy/CNT and epoxy/CNT/calcium carbonate nanocomposites were produced via in situ polymerization assisted by ultrasonication without solvent and electrical, mechanical, thermal and thermomechanical properties of nanocomposites were evaluated. Epoxy/CNT presented very low percolation threshold, near 0.05 wt % and nanocomposites with higher contents of CNT pr
Mat. Res.. Publicado em: 04/12/2017
-
7. Assessment of Percolation Threshold Simulation for Individual and Hybrid Nanocomposites of Carbon Nanotubes and Carbon Black
Modeling electrical conductivity of polymer composites with conductive fillers has great applicability to predict conductive materials behavior. In this study, the electrical behavior of simple and hybrid systems prepared from Carbon Black (CB) and Carbon Nanotubes (CNT) was studied. There have been few advances reported in the literature regarding the model
Mat. Res.. Publicado em: 18/09/2017
-
8. Effects of the silica nanoparticles (NPSiO2) on the stabilization and transport of hazardous nanoparticle suspensions into landfill soil columns
Abstract This study evaluates the stability and transport behaviors of hazardous nanoparticles into soil landfills using experimental procedures to simulate the effects of natural silica nanoparticle suspensions during their percolation into the soil layers of municipal waste landfills. For this, we prepared stabilized suspensions of nanoparticle oxides cont
REM, Int. Eng. J.. Publicado em: 2017-09
-
9. Box–Behnken experimental design for extraction of artemisinin from Artemisia annua and validation of the assay method
ABSTRACT Obtaining artemisinin and its derivatives is very costly, which limits access to low-income people. Some hydroalcoholic extract of Artemisia annua L., Asteraceae, which has shown comparable antimalarial activity could be an alternative to the purified compound, especially if the cultivars have higher content of artemisinin. The objective of this stu
Rev. bras. farmacogn.. Publicado em: 2017-08
-
10. Brown seaweed Padina gymnospora is a prominent natural wound-care product
ABSTRACT Seaweeds are related to anti-inflammatory, anti-bacterial and anti-noceptive effects. This work aimed to verify the potential of seaweed Padina gymnospora (Kützing) Sonder 1871 to improve wound healing in vitro. P. gymnospora was collected at a bethonic area in Espirito Santo. Methanolic extract of P. gymnospora was obtained by percolation. To dete
Rev. bras. farmacogn.. Publicado em: 2016-12
-
11. Method to evaluate the efficiency of manual overhead irrigation in citrus rootstock liner production
ABSTRACT Brazil produces grafted citrus seedlings in closed screen houses to reduce pest and disease incidence. Irrigation is usually performed by hand using either breaker nozzles or drilled polyvinyl chloride (PVC) pipe wands on garden hoses. Rootstocks are produced in cone-shaped containers filled with soilless potting mix. Since the containers have a sma
Eng. Agríc.. Publicado em: 2016-08
-
12. GABAergic effect of valeric acid from Valeriana wallichii in amelioration of ICV STZ induced dementia in rats
ABSTRACT Valeriana wallichii DC., Caprifoliaceae, is used to have anti-ulcer, anti-spasmodic, anti-epileptic, memory enhancer, anti-anxiety, anti-rheumatic, sedative, anti-asthmatic and diuretic activities. V. wallichii is reported to contain valpotriates, valeric acid, valerenic acid, valechlorine, valerianine, resins and alkaloids. Valeric acid, found in V
Rev. bras. farmacogn.. Publicado em: 2016-08