Photometry
Mostrando 1-12 de 101 artigos, teses e dissertações.
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1. Potassium recovery from Brazilian glauconitic siltstone by hydrothermal treatments
Abstract Silicate rock Verdete, collected in the central region of Minas Gerais state (Brazil) and composed mostly of micas (glauconite and muscovite) and tectosilicates (K-feldspar and quartz), was hydrothermally treated with several reactants in order to release and recover potassium. The hydrothermal products were characterized by flame photometry, XRD, X
REM, Int. Eng. J.. Publicado em: 2020-06
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2. ANÁLISE DE AMOSTRAS DE COMBUSTÍVEIS POR FOTOMETRIA, NIR PORTÁTIL E RMN DE 1H - UMA COMPARAÇÃO COM OS RESULTADOS ENCONTRADOS POR TÉCNICAS NORMATIZADAS
It has been recurring adulterations in fuels (such as gasoline, ethanol and diesel), being necessary the exploration of the use of more modern analytical techniques capable of controlling the quality of these fuels, since some regulated tests may be inefficient to detect the adulteration. Among them, it is highlighted proton nuclear magnetic resonance (1H NM
Quím. Nova. Publicado em: 2020-02
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3. Chloride and sodium ion concentrations in saliva and sweat as a method to diagnose cystic fibrosis
Resumo Objetivo: O diagnóstico da fibrose cística depende do valor da concentração de íons de cloreto no teste do suor (≥ 60 mEq/mL - reconhecido como o indicador-padrão para o diagnóstico da doença). Além disso, as glândulas salivares expressam a proteína RTFC igualmente às glândulas sudoríparas. Nesse contexto, nosso objetivo foi verificar
J. Pediatr. (Rio J.). Publicado em: 12/09/2019
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4. The development of a mechanical device to stretch skeletal muscle of young and old rats
OBJECTIVE: How much force is needed to stretch skeletal muscle is still unknown. The aim of this study was to develop a device that mechanically stretches rat muscle to compare the force (N) required to stretch the soleus muscle of young and aged rats and the tibio-tarsal angle joint at neutral and stretched positions. METHODS: Twelve female Wistar rats we
Clinics. Publicado em: 09/09/2019
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5. Tipos de leite e sua contribuição na ingestão diária de sódio e cálcio
Resumo O baixo consumo de cálcio e elevado de sódio por adolescentes configura um sério problema de saúde pública. A biodisponibilidade e o teor de cálcio contido no leite fazem dele a melhor opção no atendimento a Ingestão Dietética Recomendada (IDR) desse nutriente. Como o leite pode contribuir para a ingestão de sódio, a realização de progra
Ciênc. saúde coletiva. Publicado em: 05/08/2019
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6. Profile of infrared thermography in elite soccer players
Abstract Aims The aim of this study was to establish thermographic profiles of lower limbs and to correlate them with creatine kinase level in professional players. Method Thirty healthy male professional soccer players (25.4 ± 4.7 years; 179.5 ± 6.7 cm; 78.3kg ± 7.5 kg; body fat 10.2 ± 4.2 %) from a club of Brazilian first division soccer league volun
Motriz: rev. educ. fis.. Publicado em: 22/06/2017
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7. Determinação de metais em água e folha de AECHMEA BLANCHETIANA (BAKER) L.B
The aim of this research was to determine the concentrations of calcium, iron, manganese, zinc, potassium and sodium in the water and leaves of Aechmea blanchetiana (Baker) L.B species collected between the cities of Ilhéus and Itacaré, Bahia, Brazil and verify if the metals found in the water can be absorbed by the leaves. Flame atomic absorption spectrom
Quím. Nova. Publicado em: 2016-05
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8. Minerals consumption by Acetobacter xylinum on cultivation medium on coconut water
The objective of this work is to verifying the consume of the minerals K, Na, Fe, Mg, P, S-SO4-2,B,N Total Kjedahl (NTK), NO3--N, and NH4+-N in the production of bacterial cellulose by Acetobacter xylinum, according to the medium and the manner of cultivation. The fermentative process was in ripe and green coconut water. K and Na were determined by flame emi
Braz. J. Microbiol.. Publicado em: 05/04/2013
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9. Caracterização térmica e estrutural de pós e filmes finos de BaTiO3 sintetizados via método Pechini / Thermal and structural characterization of powders and thin films of BaTiO3 synthesized by Pechini method
Amorphous oxides are chemical compositions whose atomic or molecular configuration does not follow a periodicity like it happens with crystals, which are essentially constituted by oxygen atoms, which has to be the most electronegative element, and other elements. The barium titanate (BaTiO3), amorphous oxide obtained through this work has tetragonal structu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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10. A LED based photometer for solid phase photometry: zinc determination in pharmaceutical preparation employing a multicommuted flow analysis approach
Neste trabalho é proposto um fotômetro baseado em LED (diodo emissor de luz) para fotometria em fase sólida. O fotômetro foi desenvolvido para permitir o acoplamento da fonte de radiação (LED) e do fotodetector direto na cela de fluxo, tendo um caminho óptico de 4 mm. A cela de fluxo foi preenchida com material sólido (C18), o qual foi utilizado para
J. Braz. Chem. Soc.. Publicado em: 09/08/2012
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11. Growth inhibition of Staphylococcus aureus and escherichia coli strains by neutralizing IgY antibodies from ostrich egg yolk
Ostrich raising around the world have some key factors and farming profit depend largely on information and ability of farmers to rear these animals. Non fertilized eggs from ostriches are discharged in the reproduction season. Staphylococcus aureus and Escherichia coli are microorganisms involved in animal and human diseases. In order to optimize the use of
Brazilian Journal of Microbiology. Publicado em: 2012-06
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12. Desenvolvimento de métodos alternativos para a determinação dos íons metálicos sódio, potássio, cálcio e magnésio em amostras de biodiesel / Development of alternative methods for the determination of sodium, potassium, calcium and magnesium ions in samples of biodiesel
In this work reports two alternative methods for the quantitation of metallic ions (Na, K, Mg e Ca) in biodiesel samples. The proposed methods were applied to biodiesel that were synthesized from different vegetable oils and also animal fat. The proposed method uses water extraction, heating and ultrasound. The quantitation of the ions was performed using io
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2011