Experimental Analysis
Mostrando 13-24 de 5932 artigos, teses e dissertações.
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13. A Green Analytical Method Using Polyurethane Foam for The Extraction and Determination of Lauryl Ether Sulfate in Personal Care Hygiene Products
A green methodology was developed for the extraction and determination of lauryl ether sulfate in raw materials and commercial liquid soap and shower gel samples. The method avoids the use of organic solvents, offering a simple, cheap, and safe analysis. The methodology is based on the sorption of an ionic pair consisting of a cationic dye and an anionic sur
Journal of the Brazilian Chemical Society. Publicado em: 2022
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14. MIMO-PLC Communications in an Experimental Medium Voltage Network: Measurement and Analysis
Abstract This paper presents measurements at a mock-up medium voltage network to verify the feasibility of Broadband Power Line Communication (BPLC). We use the data extracted within the frequency range 2 − 30 MHz to characterize a MIMO PLC network using different phase combinations, defining the best and worst use case scenarios. The empirical data shows
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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15. Melatonin prevents age-related hearing loss in the murin experimental model
Abstract Objective: The present study aimed to perform a morphological and morphometric analysis of cochlear structures of C57BL/6J mice receiving oral melatonin for a 12-month period. Methods: 32 male C57BL/6J were divided into control and melatonin groups. Control received saline and ethanol solution and melatonin group, 50 μL of 10 mg of melatonin/kg/d
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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16. Vitamin D metabolism and extraskeletal outcomes: an update
ABSTRACT Vitamin D deficiency is a general health problem affecting individuals at all stages of life and on different continents. The musculoskeletal effects of vitamin D are well known. Its deficiency causes rickets, osteomalacia, and secondary hyperparathyroidism and increases the risk of fractures. Clinical and experimental evidence suggests that vitamin
Archives of Endocrinology and Metabolism. Publicado em: 2022
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17. Rapid Recognizing the Producing Area of a Tobacco Leaf Using Near-Infrared Technology and a Multi-Layer Extreme Learning Machine Algorithm
A novel recognition method was put forward to identify the producing areas of the flue-cured tobacco leaves rapidly and non-destructively by using a near-infrared (NIR) spectrometer and a multi-layer-extreme learning machine (ML-ELM) algorithm. In contrast to traditional linear discriminant analysis (LDA) and extreme learning machine (ELM) algorithms, the ac
Journal of the Brazilian Chemical Society. Publicado em: 2022
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18. ANALYSIS OF CARDIOPULMONARY RESISTANCE UNDER DIFFERENT LOADS IN AEROBIC EXERCISES
RESUMO Introdução O principal objetivo do exercício aeróbico é melhorar a resistência cardiorrespiratória. Com a implementação do plano nacional de ginástica, a ideia de esportes para toda a vida é gradualmente aceita pelas massas e o conceito de ginástica aeróbica está popularizando-se. Objetivo Analisar as respostas de resistência cardiorr
Revista Brasileira de Medicina do Esporte. Publicado em: 2022
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19. Correlation and selection gains in F6 wheat genotypes
ABSTRACT The agronomic traits have complex quantitative inheritance, wheat breeding has a highly cost and time expending to achieve advanced lines, and new cultivars. The objective of this work was to estimate the phenotypic (rp), genotypic (rg) and environmental (re) correlation coefficients and the genetic parameters, as well as to estimate the selection g
Revista Ceres. Publicado em: 2022
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20. VIBRATION CHARACTERISTICS, CHEMICAL BONDS AND WEAK INTERACTIONS OF 4- AND 5-HYDROXYSALICYLIC ACID INVESTIGATED BY TERAHERTZ SPECTROSCOPY AND DENSITY FUNCTIONAL THEORY
The terahertz (THz) absorption spectra of 4- and 5-hydroxysalicylic acid were measured by terahertz time-domain spectroscopy (THz-TDS) in the range of 0.4-2.8 THz. The unit cells of both were calculated by density functional theory (DFT), and the theoretical simulation and experimental data were basically in agreement. To further interpret the origin of the
Química Nova. Publicado em: 2022
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21. Evaluation of moisture content variation on strength and stiffness properties of Cedrella sp. wood specie
Abstract In order to evaluate the influence of moisture content on wood physical and mechanical properties, the present research analyzed the influence of moisture content variation on Cedrella sp. on 12 strength and stiffness properties, considering 12% moisture content up to Fiber Saturation Point (FSP) were considered. Brazilian Standard consider a correc
REM - International Engineering Journal. Publicado em: 2022
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22. Analysis of Wet Antenna Losses on 11.843 GHz Slant Path in Nigeria and Comparison with Some Tropical Climates
Abstract The amount of water deposits on the receiving dish antenna can cause additional losses and consequently contaminate the actual slant-path attenuation. Only a few research works have been reported in the literature on the measurement of wet antenna attenuation (WAA) and the technique(s) of extracting the losses from the total attenuation in tropical
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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23. Temperatures and light regimes in the germination of Areca vestiaria and Areca triandra seeds
ABSTRACT Propagation of palm trees is mainly by seeds and, in general, germination is uneven and slow, caused by several factors, such as temperature and light. We aimed to evaluate the effect of different temperature conditions and light regimes in the germination of Areca vestiaria and Areca triandra seeds. Two experiments were carried. The experimental de
Revista Ceres. Publicado em: 2022
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24. Immature defense mechanisms predict poor response to psychotherapy in major depressive patients with comorbid cluster B personality disorder
Objective: To evaluate the impact of defense mechanisms at baseline on depressive symptoms after brief psychotherapies and after 6-months of follow-up among depressed patients with and without cluster B personality disorders (PDs). Methods: This quasi-experimental study nested within a randomized clinical trial included a clinical sample of adults (18-60 ye
Brazilian Journal of Psychiatry. Publicado em: 2022