Drawback
Mostrando 1-12 de 119 artigos, teses e dissertações.
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1. The Anaortic Technique with Bilateral Internal Thoracic Artery Grafting - Filling the Gap in Coronary Artery Bypass Surgery
Abstract Coronary artery bypass grafting (CABG) has consolidated its role as the most effective procedure for treating patients with advanced atherosclerotic coronary artery disease, reducing the long-term risk of myocardial infarction and death compared to other therapies and relieving angina. Despite the recognized benefits afforded by surgical myocardial
Braz. J. Cardiovasc. Surg.. Publicado em: 2021-06
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2. FD MAC Protocol Design for Co-Existing WLANs in 5G Cellular Networks
Abstract In this paper, we design full-duplex (FD) medium access control (MAC) protocol for co-existing wireless local area networks (WLANs) in 5G cellular networks (WCFD-MAC). Our design considers some significant features of 5G networks, exceptionally, beamforming and FD capabilities at both, the base station and user equipment. FD communications may gener
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-03
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3. Heterotopic Heart Transplantation as a Left Ventricular Biological Assistance: a New Two-Stage Method Proposal
Abstract Since Barnard’s first heterotopic heart transplant in 1974, Copeland’s method has been the greatest contribution to heterotopic transplants but has the drawback of donor’s right ventricular atrophy. This new method proposes a modification in the anastomosis of the superior vena cava aiming to pre-serve donor’s right ventricular function by d
Braz. J. Cardiovasc. Surg.. Publicado em: 2020-12
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4. Effects of Reduced and Conventional Tillage on Weed Communities: Results of a Long-Term Experiment in Southwestern Spain
RESUMO: Uma desvantagem importante na adoção de técnicas de cultivo mínimo (MT) e plantio direto (NT) é o deslocamento de plantas daninhas frequentemente observado, promovendo espécies adaptadas e, com isso, um controle de plantas daninhas mais precário. Essas mudanças só podem ser detectadas com experimentos de longo prazo, e os resultados podem di
Planta daninha. Publicado em: 02/12/2019
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5. Weathering Resistance of Waterborne Polyurethane Coatings Reinforced with Silica from Rice Husk Ash
Abstract: Waterborne polyurethanes (WPUs) are interesting materials for coatings when compared to solvent-based polyurethanes, once that reducing the concentration of volatile organic compounds that are harmful for human health and the environment. However, the WPU has low weathering resistance. In order to improve this behavior among others properties, ino
An. Acad. Bras. Ciênc.. Publicado em: 25/11/2019
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6. Colombian propolis as starting material for the preparation of nanostructured lipid carriers
ABSTRACT The value of propolis is scientifically and commercially measured through the content of biologically active molecules as phenolic compounds and flavonoids; on the other hand, a high percentage of waxes in the propolis composition makes it a substandard beekeeping product. Colombian propolis is characterized by a high content of waxes; however, this
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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7. State biomarkers for Machado Joseph disease: Validation, feasibility and responsiveness to change
Abstract Machado-Joseph disease (SCA3/MJD) is the most common spinocerebellar ataxia worldwide, and particularly so in Southern Brazil. Due to an expanded polyglutamine at ataxin-3, SCA3/MJD presents a relentless course with no current disease modifying treatment. Clinical scales used to measure SCA3/MJD progression present moderate effect sizes, a major dra
Genet. Mol. Biol.. Publicado em: 10/06/2019
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8. Bivariate Copula-based Linear Mixed-effects Models: An Application to Longitudinal Child Growth Data
RESUMO Estudos longitudinais com múltiplas variáveis respostas são comuns na área de saúde pública e, consequentemente, métodos estatísticos adequados são requeridos quando há interesse em analisar a evolução temporal de uma ou mais variáveis resposta. Contudo, especificar a função de densidade conjunta de todas as variáveis respostas e a est
TEMA (São Carlos). Publicado em: 30/05/2019
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9. Evaluation of the Sustainability of Integrated Hydrothermal Synthesis of Zeolites Obtained from Waste
The high Si and Al contents in the amorphous phase of coal fly ash have been used for its conversion into zeolites. This process converts a toxic low-value by-product into a product used in a number of environmental applications, but has the disadvantage of introducing contaminants. Despite the large number of studies on the conversion of fly ash into zeolit
J. Braz. Chem. Soc.. Publicado em: 2018-07
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10. Sunlight-driven water splitting using hematite nanorod photoelectrodes
ABSTRACT The efficiency of nanostructures for photoelectrochemical water-splitting is fundamentally governed by the capability of the surface to sustain the reaction without electron trapping or recombination by photogenerated holes. This brief review will summarize the latest progress on hematite, designed with columnar morphology via chemical synthesis, fo
An. Acad. Bras. Ciênc.. Publicado em: 2018
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11. Development and Validation of a Stability-Indicating Method for Perillyl Alcohol Incorporated in Poly(lactide-co-glycolide) Nanoparticles and Stress Degradation Studies
Perillyl alcohol has been studied in the treatment of cancer disease. However, its high toxicity is a drawback, which can be overcome by its incorporation in nanostructured systems. The aim of this work was to develop and validate a chromatographic method for determination of perillyl alcohol encapsulation efficiency in a polymeric nanoparticles formulation
J. Braz. Chem. Soc.. Publicado em: 2017-12
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12. SUBSTITUIÇÃO DO NITROBENZENO PELO ÓLEO DE SOJA COMO UMA PROPOSTA PARA O ENSINO DO MÉTODO DE VOLHARD EM ANÁLISE QUANTITATIVA
Volhard method is extensively employed in the teaching laboratories of classical quantitative analysis to chloride determination and is based on the reaction of Ag+ with Cl- and Ag+ residual titration with SCN-. Its drawback is that SCN- reacts with the AgCl(s) initially formed. Nitrobenzene is used to avoid this stripping, but it is toxic to the environment
Quím. Nova. Publicado em: 2017-09