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Mostrando 1-12 de 629 artigos, teses e dissertações.
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1. Influence of Refinery Asphalt Residue Addition on Flow: A Study Using Waxy Model-System
One of the main phenomena causing problems in the oil industry is the precipitation of waxes, which can crystallize and form deposits, clogging lines and reducing flows. Many studies have been conducted seeking to overcome this problem, mainly through application of chemical to increase flow. Some studies have shown that the asphaltenes present in crude oil
Journal of the Brazilian Chemical Society. Publicado em: 2023
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2. Gas permeability and compressive strength evaluation of porous Al2O3 supported membrane
Abstract The aim was to investigate the feasibility of using a device to characterize permeability in porous substrates with low gas flux. Al2O3 supports were prepared by dry pressing using 1 to 3 wt% of polyethylene glycol (PEG) as a pore-forming agent. The green body was partially sintered at 1300 ºC. CO2 gas was used to measure both the pressure loss and
Cerâmica. Publicado em: 2022
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3. In vitro Antioxidant and Anticholinesterase Activities of Ouratea fieldingiana (Gardner) Eng. Leaf Extract and Correlation with Its Phenolics Profile with an in silico Study in Relation to Alzheimer’s Disease
Ouratea fieldingiana is a native medicinal plant from Northeastern Brazil and many biological properties are due to the phenolic constituents. The objective of this work was performing the characterization of O. fieldingiana leaf constituents to correlate with antioxidant and anticholinesterase activities by in vitro and in silico studies and thus contribute
Journal of the Brazilian Chemical Society. Publicado em: 2022
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4. Poor sanitation and transmission of COVID-19 in Brazil
ABSTRACT Coronavirus is a family of viruses that cause respiratory infections. From cases first recorded in China at the end of 2019, a new type of virus in this family, named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), was discovered. The disease caused by this virus, COVID-19, was brought into Brazil by people in social classes with great
Sao Paulo Med. J.. Publicado em: 2021-02
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5. Focusing on thyroid nodules in suspense: 10-15 mm with repeat cytology, Category III, the Bethesda System for Reporting Thyroid Cytopathology, TBSRTC
SUMMARY OBJECTIVES: Although research in relation to new vaccines for the coronavirus, SARS-CoV-2 (COVID-19), is ongoing, it has been reported that medical teams are also considering the use of antiviral drugs in patients in order to verify their effectiveness when infection signs and symptoms present, mainly in stages one and two of the disease. METHODS:
Rev. Assoc. Med. Bras.. Publicado em: 2021-02
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6. Effectiveness of early therapeutic intervention in phases one and two after COVID-19 infection: systematic review
SUMMARY OBJECTIVES: Although research in relation to new vaccines for the coronavirus, SARS-CoV-2 (COVID-19), is ongoing, it has been reported that medical teams are also considering the use of antiviral drugs in patients in order to verify their effectiveness when infection signs and symptoms present, mainly in stages one and two of the disease. METHODS:
Rev. Assoc. Med. Bras.. Publicado em: 2021-02
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7. Critical analysis on the use of cholecalciferol as a COVID-19 intervention: a narrative review
ABSTRACT BACKGROUND: The World Health Organization has declared that a pandemic situation exists in relation to the disease caused by the new coronavirus, COVID-19. So far, the absence of a vaccine against the new coronavirus has led people worldwide to seek various therapeutic alternatives, including use of cholecalciferol. DESIGN AND SETTING: Narrative
Sao Paulo Med. J.. Publicado em: 2021-02
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8. Social intra-organizational connection: effects in three relational domains
Abstract Purpose The purpose of this paper is to present the construct of social intra-organizational connection (SIC). This construct reflects the extent to which a focal actor believes his alters present behaviors of social inclusion in relation to himself. This assessment compares the ego’s expectations of being included and the behavior of inclusion p
RAUSP Manag. J.. Publicado em: 2020-09
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9. DEVELOPMENT OF AN ANALYTICAL METHOD FOR THE DETERMINATION OF LEAD BASED ON LOCAL SURFACE PLASMON RESONANCE OF SILVER NANOPARTICLES
Lead is environmental pollutant that even in low trace is harmful for human health and wildlife. In this study we presented a colorimetric method for determination of Pb2+ in water by aggregation of silver nanoparticles capped citrate in the presence of deferoxamine as chelating agent. Silver nanoparticles were prepared by reduction of AgNO3 with NaBH4. In t
Quím. Nova. Publicado em: 2020-06
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10. SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF NEW Cu (II), Co (II) AND Sn (II) COMPLEXES WITH THE SODIUM HYDROTRIS(2-MERCAPTOTHIAZOLYL)BORATE LIGAND
The emergence of antibiotic resistance among microbial pathogens is a serious public health problem, resulting in a constant need of discovering new antibiotics. For this purpose, we synthetized and determined the antimicrobial activity of copper (Cu), cobalt (Co), and tin (Sn) complexes coordinated with scorpionate ligand in a tridentate mode against microo
Quím. Nova. Publicado em: 2020-05
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11. Clinical characteristics and associations of palmoplantar pustulosis: an observational study,
Abstract Background: Palmoplantar pustulosis is a chronic and relapsing disease of the palms and soles, which is characterized by scattered clusters of pinhead-sized, sterile pustules. Objective: The aim of the present study was to determine demographic features, co-morbidities, and relation of palmoplantar pustulosis with psoriasis. Methods: A total of 4
An. Bras. Dermatol.. Publicado em: 2020-02
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12. Treatment of Kimura's disease with oral corticosteroid and methotrexate,
Abstract Background: Palmoplantar pustulosis is a chronic and relapsing disease of the palms and soles, which is characterized by scattered clusters of pinhead-sized, sterile pustules. Objective: The aim of the present study was to determine demographic features, co-morbidities, and relation of palmoplantar pustulosis with psoriasis. Methods: A total of 4
An. Bras. Dermatol.. Publicado em: 2020-02