Composition Law
Mostrando 1-12 de 92 artigos, teses e dissertações.
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1. How increased atmospheric carbon dioxide and ‘The Law of the Minimum’ are contributing to environmental obesity
Resumo Justus von Liebig observou que era possível aumentar a produção agrícola adicionando pequenas quantidades de nitrogênio (N), fósforo (P) e potássio (K) aos solos. Essa descoberta levou a mais recente revolução agrícola. Contudo, uma vez que a maioria das plantas e microrganismos podem ser não-homeostáticos em relação a composição quím
Acta Limnol. Bras.. Publicado em: 28/11/2019
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2. Optimum mine production rate based on price uncertainty
Abstract The production rate of a mining operation has an important effect on the operational cycle and gross profit, which are often evaluated based on engineering practices. Assessment of the economic performance of mine operations in mining engineering is of great importance because an incorrect production rate can result in significant financial losses.
REM, Int. Eng. J.. Publicado em: 16/09/2019
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3. The influence of Cu content on high temperature corrosion behavior of heat - resistant molten salt steel
ABSTRACT This work studies the high temperature corrosion behavior of new heat-resistant steel with salt coating method of 75%Na2SO4+25%NaCl coating on the steel surface at 700ºC. The chemical composition of corrosion products and surface morphology of the corrosion layer were analyzed using X-ray diffractometer (XRD), scanning electron microscopy (SEM), en
Matéria (Rio J.). Publicado em: 16/09/2019
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4. Caracterização de biossólido e potencial de uso na produção de mudas de Schinus terebinthifolia Raddi
RESUMO O presente trabalho teve como objetivo caracterizar técnica, química e biologicamente o biossólido proveniente da estação de tratamento de esgoto (ETE) de Alegria, Rio de Janeiro, e inferir sobre sua aptidão como componente do substrato para produção de mudas de Schinus terebinthifolia Raddi (aroeira pimenteira). Foram coletadas amostras signi
Eng. Sanit. Ambient.. Publicado em: 06/06/2019
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5. A "Primeira Versão" da Teoria da Crise de Marx: a queda da massa de mais-valia social e o limite interno absoluto do capital
Resumo A teoria da crise de Marx é normalmente associada à lei da queda tendencial da taxa de lucro exposta no Livro Terceiro de O Capital. Segundo Marx, a subida da composição orgânica do capital - o fato de o capital variável crescer em termos absolutos, mas decrescer em termos relativos devido à subida mais rápida do capital constante - origina um
Estud. Econ.. Publicado em: 2019-03
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6. Evaluation of metals in tomato sauces stored in different types of packaging
Abstract There is a growing concern about health and food safety when it comes to processed food. In the present study, it has been hypothesized that tomato sauces contain high amounts of metals possibly leached from packaging. Concentrations of As, Cd, Pb, Cr, Ni, Sn and Sb were determined by ICP-MS in tomato sauces stored in metallic, plastic, cellulosic
Food Sci. Technol. Publicado em: 26/07/2018
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7. Lead hazard evaluation for cathode ray tube monitors in Brazil
Abstract Cathode ray tube (CRT) monitors are electronic equipment mainly made of glass, polymers and metals. These devices became obsolete because of emerging technologies such as LCD, LED and plasma; thus generating a huge stockpile of e-waste worldwide. In this CRT study, a natural leaching simulation (NBR10005) was performed to determine the toxicity of t
Braz. J. Chem. Eng.. Publicado em: 2018-01
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8. Quality evaluation of red wines produced from the Isabella and Ives cultivar (Vitis labrusca): physicochemical parameters, phenolic composition and antioxidant activity
Abstract The objective of this study was to evaluate the quality of commercial red wines (Isabella and Ives [IsB]; Isabella, Ives, Seibel and Concord [IsSC]; and Isabella and Ives [IsBb]) produced from Isabella and Ives grapes grown in southern Brazil. The parameters required by Brazilian law were evaluated, and the chemical parameters of the phenolic compou
Food Sci. Technol. Publicado em: 29/05/2017
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9. DESENVOLVIMENTO DE UMA TÉCNICA ULTRASSÔNICA PARA AVALIAR TEORES DE ÓLEO E GRAXA EM EFLUENTES DE BIOCOMBUSTÍVEIS
Ultrasound as a metrology tool has many applications in health care, industrial, and chemical analyses. Ultrasonic techniques are rapid, low-cost, non-invasive, and highly repeatable. Although ultrasound can be used to measure emulsions, no effort had been made thus far to optimize its sensitivity for metrological analysis. In this work, a technique for anal
Quím. Nova. Publicado em: 2015-12
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10. Composition of pectic polysaccharides in a Portuguese apple (Malus domestica Borkh. cv Bravo de Esmolfe)
Malus domestica Borkh. cv Bravo de Esmolfe is a typical Portuguese apple cultivar classified as Protected Designation and Origin (PDO). It is a traditional product produced under strict conditions and labelled with a specific law protected designation. This cultivar presents quite good sweetness and flavor. The monosaccharide composition of the pectic polysa
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-08
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11. Proximate and mineral composition of industrialized biscuits
The aim of this study was to analyze the proximate and mineral composition of 21 types of biscuits. All biscuits showed high fat contents, significantly different (P < 0.05) from those described on the labels, except for three brands. Insoluble fiber fractions were predominant in the analyzed samples. Among the 21 biscuits analyzed, 16 showed food label valu
Food Sci. Technol. Publicado em: 17/05/2013
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12. A importância da lei de Gay-Lussac para a classificação dos compostos orgânicos
This article shows the genesis of the law of volumes of combining gases, formulated by Gay-Lussac in 1808, and how it allowed the expression of the composition of organic compounds in terms of whole numbers of volumes, thus leading to the first classification of organic compounds, formulated by Dumas and Boullay in 1828. It was from this work that Organic Ch
Quím. Nova. Publicado em: 2013