Chemical Formulas
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. A UNIFIED FORMULA FOR HYDROCARBONS WITH APPLICATIONS TO FUNCTIONAL GROUPS
Was supposed a numerical relationship between atoms of Hydrogen and Carbon in a hydrocarbon, assumption valid for all types of chains. In the proposed equation, variables such as number and types of carbon bonds are present, as well as the possible cycles. It was shown that the equation reduces to the known “general formulas” when applied to the type of
Quím. Nova. Publicado em: 20/07/2020
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2. O CONCEITO DE VALÊNCIA EM LIVROS DIDÁTICOS DE QUÍMICA GERAL ENTRE AS DÉCADAS DE 1890 E 1940
This paper aims to investigate the presentation of the concept of valence in college-level, general chemistry textbooks published in the USA between the 1890s and the 1940s. The delimited period covers the emergence of theories about atomic structure, electronic distribution and chemical bonding. Transition from the classical concept of valence (as the combi
Quím. Nova. Publicado em: 2019-02
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3. Osmolality and pH in handmade enteral diets used in domiciliary enteral nutritional therapy
Abstract Patients who need prolonged domiciliary enteral nutritional therapy may benefit from handmade diets. However, the preparation of such diets might cause insecurity with regard to their nutritional composition and physical-chemical properties. Current study analyzes the osmolality and Hydrogen-Ion concentration (pH) on handmade enteral diets. To this
Food Sci. Technol. Publicado em: 27/04/2017
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4. High shear dispersion of tracers in polyolefins for improving their detection
Abstract An efficient recycling of end-of-life products is of crucial interest from an economical and ecological point of view. However, the near infrared spectroscopy often used for the optic sorting processes is limited because of the absorption of carbon black present in black plastics and as it only sorts as a function of chemical formulas. The tracing t
Polímeros. Publicado em: 2015-10
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5. Succinato de ródio (II): síntese, caracterização e adsorção em nanopartículas de maghemita / Rhodium (II) succinate: synthesis, caracterization and adsorption on maghemite nanoparticles
In this work it was described the synthesis and characterization of rhodium(II) succinate complex unpublished and adsorption study in maghemite nanoparticles. The rhodium(II) succinate was synthesized from a precursor rhodium(II) carboxylate, rhodium(II) trifluoracetate with a yield of 48.2%. The complex has become completely soluble in aqueous medium only w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2012
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6. Construindo estruturas quimicas de substâncias desconhecidas : uma proposta de material paradidático
The motivation for the realization of this work stemmed from the perception that students think the chemical formulas themselves are the object of the Chemistry science, not the materials and substances they represent. Researches in Chemistry education have shown that the representational part of the chemical knowledge has been prioritized in curricula and t
Publicado em: 2010
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7. Construindo estruturas químicas de substâncias desconhecidas : uma proposta de material paradidático
A motivação para a construção desse trabalho originou-se da percepção de que alunos e alunas pensam que as fórmulas químicas são o objeto de estudo da Química e não as substâncias e os materiais, as quais representam. Pesquisas em educação química têm comprovado que, didaticamente, o nível representacional do conhecimento químico tem sido p
Publicado em: 2010
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8. Qualidade de água de nascentes como reflexo do manejo do uso e ocupação do solo e conservação da mata ciliar, no município de Ouro Branco, MG
This study was carried through in five selected microbasins of the city of Ouro Branco, MG, located in the region of the High Paraopeba, with the objectives of: The physical characterization of the microbasins with different states of conservation and uses of the ground, to evaluate the quality of the water and to classify their springs. The description of t
Publicado em: 2010
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9. Avaliação in vitro de propriedades mecânicas, químicas e antimicrobianas de um selante de fossas e fissuras isento de bisfenol A / In vitro evaluation of mechanical, chemical and antimicrobial properties of a bisphenol A-free pit-and-fissure sealant
Tendo em vista o importante papel desempenhado pelos selantes de fossas e fissuras na prevenção da cárie dental, o objetivo do presente estudo foi avaliar in vitro propriedades mecânicas, químicas e ntimicrobianas do selante isento de bisfenol A Embrace Wetbond™. Para os testes de resistência ao cisalhamento e microinfiltração foram selecionado
Publicado em: 2010
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10. Elaboração de fórmulas enterais artesanais de baixo custo adequadas em fluidez e osmolalidade / Developing of handmade enteral formulations of lower cost adequate in fluidity and osmolarity
The enteral nutrition consists in the administration of nutrients (food and/or nutritional supplements) into the gastrointestinal tract by using a probe when the oral ingestion is inadequate. Handmade preparations represent an option of enteral diet, which consist in solutions in which the foods are used freshly, or food products and/or modules of nutrients.
Publicado em: 2009
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11. PHYSICAL, CHEMICAL AND ACCEPTABILITY OF ICE CREAM WITH mangaba and REDUCED ENERGY CONTENT / CARACTERÍSTICAS FÍSICAS, QUÍMICAS E ACEITABILIDADE DE SORVETE COM MANGABA E REDUZIDO TEOR ENERGÉTICO
Mangaba (Hancornia speciosa Gomez) is a typical Cerrado biome fruit widely used in regional gastronomy and pharmacology. Its distinguished potentialities brought up increased interest and stimulated sustainable cultivation in the Northeast and Central West Regions of Brazil. The replacement of shortening and sugar on the physical and chemical properties of m
Publicado em: 2008
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12. Development of alternative nutritional formulas for elderly enteral nourishment using conventional foods / Elaboração de formulados nutricionais alternativos a partir de alimentos convencionais para a alimentação de idosos
The aim of this study was to develop alternative formulas for elderly enteral feeding using conventional foods from food staples distributed in the city of Piracicaba-SP. The foods used in the formulas were: corn meal, soya oil, rice, beans, pasta, sardine, powder milk, corn starch, eggs, texturized soya protein, cabbage, and carrot. Physical analyses (dripp
Publicado em: 2008