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Mostrando 1-12 de 845 artigos, teses e dissertações.
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1. FATORES DE EMISSÃO E DE ENRIQUECIMENTO DA CROSTA PARA ELEMENTOS TRAÇO (MP2,5) EMITIDOS PELA FROTA VEICULAR NA REGIÃO METROPOLITANA DE SÃO PAULO, BRASIL
Air pollution can cause several negative impacts on health and the environment. In large urban centers, this pollution is directly related to anthropogenic activities, mainly activities in the transportation sector. This study analyzed data on black carbon, fine particulate material (PM2.5) and its main trace elements from automotive vehicles (S, P, K, V, Cr
Química Nova. Publicado em: 2022
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2. Source-sink relationship of soybean accessed by increasing in solar radiation through the plant canopy
ABSTRACT The photosynthetic metabolism is a key point to improve soybean yield. In this work, we demonstrated that radiation use by soybean plants can be improved, aiming to improve the grain yield in the lower canopy. The objective of this study was to observe whether the increase in solar radiation input in the canopy of soybean plants improves their yield
Revista Ceres. Publicado em: 2022
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3. A cross-sectional study analyzing the quality of YouTube videos as a source of information for COVID-19 intubation
Abstract Introduction: There are many possible sources of medical information; however, the quality of the information varies. Poor quality or inaccurate resources may be harmful if they are trusted by providers. This study aimed to analyze the quality of coronavirus disease 2019 (COVID-19)- related intubation videos on YouTube. Methods: The term “COVID-
Brazilian Journal of Anesthesiology. Publicado em: 2022
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4. PREDICTIVE MODELS OF CHLOROPHYLL CONTENT IN SUGARCANE SEEDLINGS USING SPECTRAL IMAGES
ABSTRACT Chlorophyll content is a widely used parameter for nutritional status diagnosis in sugarcane. This study aimed to develop a predictive model of chlorophyll content in sugarcane seedlings using spectral imagery analysis within the electromagnetic spectrum visible range. The experiment was carried out in a split-plot design, with two fertilization rat
Eng. Agríc.. Publicado em: 2021-08
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5. Agroindustry Residues as a Source for Cellulose Nanofibers Production
Our study was motivated by the large amount of crop residues produced in Brazil, which represent underutilized waste biomass and a serious threat to the environment because of the landfilling. For example, even though the corn crop is not popular in Brazil, it is produced in the area of around 18-20 million hectares with an average production of 5-6 t ha-1.
J. Braz. Chem. Soc.. Publicado em: 2021-04
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6. A note on real estate appraisal in Brazil
Abstract Brazilian banks commonly use linear regression to appraise real estate: they regress price on features like area, location, etc, and use the resulting model to estimate the market value of the target property. But Brazilian banks do not test the predictive performance of those models, which for all we know are no better than random guesses. That int
Rev. Bras. Econ.. Publicado em: 2021-03
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7. Knowledge and Practice of Hearing Screening and Hearing Loss Management among Ear, Nose, and Throat Physicians in Jordan
Abstract Introduction One of the main factors that affect the early diagnosis and intervention of hearing loss is inadequate knowledge by the health care workers. Ear, nose, and throat (ENT) specialists are the main source of information about hearing loss and its management in most developing countries, such as Jordan. Objective The purpose of the presen
Int. Arch. Otorhinolaryngol.. Publicado em: 2021-01
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8. GREEN CHEMISTRY TEACHING FOR SUSTAINABILITY IN PAPERS PUBLISHED BY THE JOURNAL OF CHEMICAL EDUCATION
This paper discusses 286 proposals and reports of Green Chemistry (GC) teaching experiences, in papers of the Journal of Chemical Education (JCEd) until 2019. The analysis was based on previous categories: source-problem, paper focus, subjects/area of knowledge, target groups, GC contents, type of approach and purpose(s) of the proposal. A list of possible c
Quím. Nova. Publicado em: 2020-12
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9. ANÁLISE DOS TRABALHOS APRESENTADOS NAS SESSÕES COORDENADAS DA ÁREA DE ENSINO NAS REUNIÕES ANUAIS DA SOCIEDADE BRASILEIRA DE QUÍMICA
This article analyzes the abstracts accepted and presented at the Coordinated Sessions of the teaching area at the Annual Meetings of the Brazilian Chemical Society. The research is characterized as qualitative of bibliographic type, having as the source of information the abstracts book of the last 10 editions (2010-2019) of the event. Through the texts, we
Quím. Nova. Publicado em: 2020-09
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10. IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO
Most volatile organic compounds (VOC) have adverse effects on human health and the environment and react individually with different velocities and mechanisms to form ozone. The present work determined the concentration of 55 samples of benzene, toluene, ethylbenzene and xylenes (BTEX), an important subgroup of VOC, by active sampling with active carbon cart
Quím. Nova. Publicado em: 20/07/2020
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11. Diamonds from the Santo Antônio River (Delfinópolis, Minas Gerais): probable relationship with the Canastra-3 Kimberlite
Abstract The study identifies the Canastra-3 Kimberlite magnetic anomaly as the likely primary source of the alluvial diamonds recovered by "garimpeiros" in the Santo Antônio River basin (Delfinópolis, southwestern Minas Gerais). This conclusion is based on cumulative geophysical, hydrographic, metallogenical and mineral geochemistry evidences. The study a
REM, Int. Eng. J.. Publicado em: 2020-03
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12. Reprodutibilidade das medições da retina e da coroideia utilizando a tomografia de coerência ótica Swept-Source em pacientes com a doença de Parkinson
RESUMO Objetivo: Avaliar a reprodutibilidade das medições da retina e da coroide nas áreas macular e peripapilar utilizando a tomografia de coerência ótica com fonte de varredura pacientes com doença de Parkinson. Métodos: Um total de 63 olhos de 63 pacientes com doença de Parkinson idiopática foram avaliados usando um protocolo 3D de tomografia d
Arq. Bras. Oftalmol.. Publicado em: 2020-02