Refractometry
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Evolution of soluble solid content and evaporation rate curves during the manufacture of dulce de leche (dl)
Abstract Dulce de leche is an evaporated dairy product that can be manufactured in different types of pots or pans. The manufacturing endpoint for dulce de leche can be determined by measuring the soluble solids content. We investigated the evaporation rates and the evaporative capacity of atmospheric pressure evaporators (pans) during the manufacture of dul
Food Sci. Technol. Publicado em: 10/12/2018
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2. Buriti of the cerrado of Minas Gerais, Brazil: physical and chemical characterization and content of carotenoids and vitamins
Abstract The fruit species of the Brazilian Cerrado, such as buriti (Mauritia vinifera ), occupy a prominent position in the ecosystem since they contribute to the economic potential of the region and have high nutritional value. We aimed to evaluate the physical characteristics, chemical composition and content of vitamin C, carotenoids, vitamin E and fola
Food Sci. Technol. Publicado em: 30/07/2018
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3. Comparison between refraction measured by Spot Vision ScreeningTM and subjective clinical refractometry
OBJECTIVE: The purpose of this study was to evaluate the accuracy of Spot Vision ScreeningTM as an autorefractor by comparing refraction measurements to subjective clinical refractometry results in children and adult patients. METHODS: One-hundred and thirty-four eyes of 134 patients were submitted to refractometry by Spot and clinical refractometry under
Clinics. Publicado em: 2016-02
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4. Study of the physical and physicochemical characteristics of fruits of the licuri palm (Syagrus coronata (Mart.) Becc.) found in the Atlantic Forest of Minas Gerais, Brazil
AbstractThe Atlantic Forest has species of native fruits, consumed fresh and processed, which have an important contribution to food sovereignty of families that consume it. This study examined the physical and physicochemical characteristics, proximate composition, concentration of carotenoids, vitamin C, vitamin E and minerals in the pulp and kernels of fr
Food Sci. Technol. Publicado em: 25/08/2015
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5. Colostrum and Serum Protein Levels in Water Buffaloes.
Blood serum samples and colostrum of 17 Murrah water buffalo cows (Bubalus bubalis) were examined at birth as well as their offspring before the ingestion of colostrum at 1, 3, 6, 12, 24, 48, 72 and 96 hours after birth to determine the failure in the passive transfer of an-tibodies. The parameters studied included the total protein (TP), albumin (ALB), alph
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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6. Refratômetro por ondas evanescentes em guias de ondas planares / Refractometer by evanescent waves in planar waveguides
Nesse trabalho, propomos uma modificação da técnica de caracterização de filmes conhecida por m-line para o desenvolvimento de um refratômetro para gases e líquidos. O principio dessa técnica consiste no acoplamento de ondas evanescentes em guias de ondas planares obtidos via o fenômeno da reflexão total interna frustrada através de dispositivos a
Publicado em: 2010
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7. Estudo termodinamico do equilibrio liquido-liquido visando a remoção do enxofre do oleo diesel com liquidos ionicos / Thermodynamic study of liquid-liquid equilibrium aiming sulfur removal by using ionic liquids
The sulfur contaminants more difficult to remove from diesel oil by hydrodesulfuration process (HDS) are the sterically hindered aromatic compounds, like dibenzothiophene (DBT), and its alkylated derivatives 4-methyl-dibenzothiophene (4-MDBT) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT), commonly called DBTs. Increasing the number of methyl groups attached
Publicado em: 2009
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8. Estudo da transmissão da imunidade passiva e da mortalidade em cordeiros mestiços de Santa Inês, na região norte de Minas Gerais
The transferring of passive immunity and the causes of mortality lambs breed and crossbreed Santa Inês were studied this work developed in north of Minas Gerais. The transferring of passive immunity was determined by laboratory and field tests. The main causes of neonatal mortality up to 90 days of age were identified by necropsies. Sixty-nine Santa Inês e
Publicado em: 2006
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9. Avaliation of figures of merit in multivariate calibration in the determination of quality control parameters in alcohol industry by near infrared spectroscopy / Avaliação de figuras de merito em calibração multivariada na determinação de parametros de controle de qualidade em industria alcooleira por espectroscopia no infravermelho proximo
Soluble solids (Brix), sucrose (Pol) and Reducing Sugar (RS) are important properties in the quality control of alcohol industry to determine grower payment. Thus, the validation was achieved through determination of figures of merit for multivariate calibration models using near infrared spectroscopy (NIR) in region of 1100 - 2500 nm by partial least square
Publicado em: 2005
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10. Determinação simultanea e não-destrutiva de solidos totais e soluveis, licopeno e beta-caroteno em produtos de tomate por espectroscopia no infravermelho proximo utilizando calibração multivariada
SIMULTANEOUS AND NON-DESTRUCTIVE DETERMINATION OF TOTAL AND SOLUBLE SOLIDS, LYCOPENE AND BETA-CAROTENE IN TOMATO PRODUCTS BY NEAR INFRARED SPECTROSCOPY AND MULTIVARIATE CALIBRATION brings the development of calibration models by using chemometrical techniques of rnultivariate data regression. The sirnultaneous and non-destructive determination of important p
Publicado em: 2004
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11. Phase separation between nucleoid and cytoplasm in Escherichia coli as defined by immersive refractometry.
The refractive indices of nucleoid and cytoplasm in Escherichia coli were derived theoretically and experimentally. For the theoretical estimates, we made use of the known macromolecular composition of E. coli B/r (G. Churchward and H. Bremer, J. Theor. Biol. 94:651-670, 1982) and of estimates of cell and nucleoid volumes. These were obtained from micrograph
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12. Photometric immersion refractometry of bacterial spores.
Photometric immersion refractometry was used to determine the average apparent refractive index (n) of five types of dormant Bacillus spores representing a 600-fold range in moist-heat resistance determined as a D100 value. The n of a spore type increased as the molecular size of various immersion solutes decreased. For comparison of the spore types, the n o