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Mostrando 1-12 de 256 artigos, teses e dissertações.
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1. EFFECT OF REACTION CONDITIONS ON PARTICLE SIZE OF ZNO NANOPARTICLES VIA CONTROLLED PRECIPITATION METHOD AND IN-VITRO ANTIBACTERIAL CAPACITY
High-yield ZnO spheroidal nanoparticles with an average diameter around 23 nm (≈ 25% frequency) and 30 nm (≈ 28% frequency) were obtained by controlled semicontinuous precipitation at low temperatures. This synthesis was obtained from hydrozincite (Zn5(CO3)2(OH)6) as primary nanoparticles. The Zn5(CO3)2(OH)6 nanoparticles were synthesized by hydrolysis o
Química Nova. Publicado em: 2022
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2. Application of Nickel Ferrite Nanoparticles in Adsorption of Amoxicillin Antibiotic
According to the World Health Organization, amoxicillin (AMX) is the most widely consumed antibiotic in the world. Consequently, there is great interest in the development of new technologies that allow the removal of this type of contaminant, as exposure to antibiotic residues can cause a variety of adverse effects, such as toxicity and antimicrobial resist
J. Braz. Chem. Soc.. Publicado em: 2020-12
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3. Structural and Functional Stabilization of Sericin from Bombyx mori Cocoons in a Biopolysaccharide Film: Bioorigami for Skin Regeneration
Development and optimization of a bioorigami film with silk sericin was pursued for skin regeneration. Several formulations were produced, with varying integrated sericin contents, viz. 0, 1, 2, 5, 10, 20 and 50 mgsericin mLfilm-1. The physico-chemical characteristics of the bioorigami films produced were evaluated via infrared spectrophotometry, X-ray diffr
J. Braz. Chem. Soc.. Publicado em: 2020-04
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4. HYDROXYAPATITE - CARBON NANOTUBE COMPOSITES FOR DRUG DELIVERY APPLICATIONS
Abstract The aim of this study was the synthesis of composites containing hydroxyapatite (Hap) or silicon substituted hydroxyapatite (HapSi), carboxyl functionalized carbon nanotubes (fMWCNT) and gelatin (G) in different ratios. Ibuprofen (IBU) was chosen as a model drug for the formulation of extended-release dosage forms. The obtained composites were chara
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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5. Lutzomyia longipalpis (Diptera: Psychodidae) Argentina-Bolivia border: new report and genetic diversity
American visceral leishmaniasis (AVL) has two main scenarios of transmission as follows: scattered cases in rural areas and urban outbreaks. Urban AVL is in active dispersion from the northeastern border of Argentina-Paraguay-Brazil to the South. The presence of Lutzomyia longipalpis was initially reported in urban environments in the northwestern border of
Mem. Inst. Oswaldo Cruz. Publicado em: 30/09/2019
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6. Vectors of arboviruses in the state of São Paulo: 30 years of Aedes aegypti and Aedes albopictus
RESUMO OBJETIVO Descrever a infestação dos municípios paulistas pelos vetores Aedes aegypti e Aedes albopictus , caracterizar a sazonalidade e analisar as temperaturas médias e as densidades larvárias. MÉTODOS Foram empregados mapas com informações sobre a infestação dos municípios entre 1986 e 2015. A análise da densidade larvária das espéci
Rev. Saúde Pública. Publicado em: 30/09/2019
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7. Sensitivity of hydrological connectivity in a semiarid basin with a high-density reservoir network
Resumo Os reservatórios de água, em geral, têm sido considerados a principal causa de redução da conectividade hidrológica a jusante nos canais. Portanto, este estudo tem como objetivo analisar a sensibilidade da conectividade hidrológica na bacia hidrográfica do reservatório de Orós, utilizando o modelo ResNet, desenvolvido para simular os process
Rev. Ambient. Água. Publicado em: 22/07/2019
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8. STUDY OF THE CHROMIUM(VI) REMOVAL FROM AQUEOUS SYSTEMS BY COBALT NANOPARTICLES
The cobalt nanoparticles (NPs-Co) were synthesized and applied in the removal of Cr(VI). The obtained nanomaterials presented magnetic properties and were characterized by the techniques of Transmission Electron Microscopy and X-ray diffraction. The NPs-Co, with a diameter of less than 50 nm, had a composition based on metallic cobalt and cobalt oxide. The N
Quím. Nova. Publicado em: 18/07/2019
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9. An Alternative and Simple Method for the Preparation of Bare Silica Nanoparticles Using Sugarcane Waste Ash, an Abundant and Despised Residue in the Brazilian Industry
Sugarcane waste ash, a Si-rich waste product, is generated in large quantities and creates a serious disposal problem in the Brazilian ethanol-sugar industry, affecting the environment and public health. Here, a simple method capable of generating bare silica nanoparticles utilizing this residue is demonstrated. Firstly, the crystalline silica present in sug
J. Braz. Chem. Soc.. Publicado em: 04/07/2019
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10. A SYSTEMATIC REVIEW ON THE INFLUENCE OF HLA-B POLYMORPHISMS ON HIV-1 MOTHER-TO-CHILD-TRANSMISSION
ABSTRACT Background: Mother-to-child-transmission (MTCT) is the main route of HIV-1 infection in children. Genetic studies suggest HLA-B alleles play an important role on HIV-1 transmission, progression, and control of HIV-1 infection. Objective: To evaluate which polymorphisms of HLA-B are involved in HIV-1 MTCT. Methods: Two independent reviewers perfor
Braz J Infect Dis. Publicado em: 20/05/2019
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11. Literatura da experiência no século XVII
Resumo "L'espèce de journal" deixado por Marie Du Bois (1601-1679) parece se situar na categoria “escritos do foro íntimo”, mas é utilizado neste artigo para questionar o fundamento dessa categoria. Partindo da pergunta sobre as perspectivas de transmissão presentes neste texto, trata-se de medir sua capacidade de assegurar a presença distanciada de
Varia hist.. Publicado em: 16/05/2019
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12. Zinc Ferrite Nanoparticles via Coprecipitation Modified Method: Glycerol as Structure Directing and Stabilizing Agent
Coprecipitation is one of the most practical methods used to synthesize ferrite nanoparticles. Fine characteristics of these materials can be improved by means of a series of modifications in the synthesis method. In this paper we present a study of influence of glycerol as structure directing and stabilizing agent in the synthesis of zinc ferrite nanopartic
J. Braz. Chem. Soc.. Publicado em: 2019-04