Spectrophotometry Applications
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. SPRAY DEPOSITION ON MAIZE USING AN ELECTROSTATIC SPRAYER
ABSTRACT It is a well-known fact that the application of pesticides can be improved using an electrostatic spray due to the reduction of the application rate and increase in deposition on plant targets. However, little information exists on the use of such technology in maize crops. Thus, this study is aimed to evaluate the spray deposition on maize resultin
Eng. Agríc.. Publicado em: 2020-08
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2. NEW APPLICATIONS FOR AMOXICILLIN DETERMINATION IN PURE FORM AND PHARMACEUTICALS BASED ON IODATE-IODIDE MIXTURE: TITRIMETRY AND SPECTROSCOPY STUDIES
Three simple methods are described for the determination of amoxicillin (AMX) in bulk drug and dosage forms using iodate-iodide mixture reagent. These methods employed the well-known analytical reaction between iodate-iodide mixture in the presence of acid solution. The iodide oxidized by iodate to iodine in an amount equivalent to the -COOH group present in
Quím. Nova. Publicado em: 2020-01
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3. Biosynthesized silver nanoparticles: are they effective antimicrobials?
BACKGROUND Silver nanoparticles (AgNPs) are increasingly being used in medical applications. Therefore, cost effective and green methods for generating AgNPs are required. OBJECTIVES This study aimed towards the biosynthesis, characterisation, and determination of antimicrobial activity of AgNPs produced using Pseudomonas aeruginosa ATCC 27853. METHODS
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-08
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4. Avaliação do extrato do fungo caripia montagnei e de agonistas de PPAR - α no processo inflamatório
The mushrooms have been object of intense research in view of its potential raising of application in different sectors of the pharmacology and alimentary industry. Among diverse bioactive composites of polyssacharides nature that exist in the fungus the glucans are much searched. These are polymers of glucose and classified as the type of glicosidic linking
Publicado em: 2008
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5. Caracterização e análises do ascorbato de monometilsilanotriol em formulações cosméticas / Characterization and analysis of monomethylsilanetriol ascorbate in cosmetic formulations
The monomethylsilanetriol ascorbate( MSA) presents the same functional properties of vitamin C. Besides presents antioxidant and depigmentant activity, the monomethylsilanetriol ascorbate presents silanol in it chemical structure. The silanol is a privileged active ingredient for cosmetics because it essential for growth, development and regeneration of cuta
Publicado em: 2007
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6. "Sistemas de análises químicas em fluxo explorando multi-impulsão e detecção espectrofotométrica: aplicação a formulações farmacêuticas e a extratos de solos" / Multi-pumping flow systems with spectrophotometric detection: application to analysis of pharmaceuticals and soil extracts
Multi-pumping flow systems (MP) utilize solenoid pumps as fluid propelling devices, which deliver pulsed flows. This feature was evaluated in relation to the design, operation and performance of the system, to the mixing conditions, and to the dispersion of the introduced solution. The general evaluation of the MP systems involved investigations about precis
Publicado em: 2006
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7. Preparação de eletrodos opticamente transparentes
A simple experiment for the preparation of transparent conducting glass electrodes by deposition of pure and fluorine doped SnO2 films is described. This procedure was tested in the undergraduate inorganic course at IQ-UNICAMP. The success in achieving a conducting layer was easily checked using the standard probes of a volt-ohm meter. The optical transmitta
Química Nova. Publicado em: 2005-03
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8. Adsorção e dessorção de cobre em solos sob aplicação de lodo de esgoto e calda bordalesa / Adsorption and desorption of copper in soils under sewage-sludge and bordeaux mixture application
The introduction of heavy metals in soil could be effectuated in differents ways, being the applications of sewage-sludge and industrial residues the most studied of them. However, traditional agricultural practices can contribute to take metals to the soil as well, through the use of mineral fertilizers, pesticides and also organic manure.The objectives of
Publicado em: 2005
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9. Voltametria de onda quadrada. Segunda parte: aplicações
The aim of this work is to discuss some selected applications of square wave voltammetry published in the last five years. The applications focused here cover several electroanalytical fields such as: determination of pesticides; molecules with biological activity; metals and other environmental pollutants. Special attention is given to the work developed in
Química Nova. Publicado em: 2004-10
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10. Filmes delgados luminescentes obtidos a partir de hidroxicarbonatos de ítrio ativados por európio ou térbio
These films were obtained by dip coating. Parameters like dislocation velocity; number of deposits, suspension concentration, and number of deposits followed or not by heat treatment between each deposit and calcination temperature were evaluated for establishing the best homogeneity. The obtained films were characterized in terms of their morphology, optica
Química Nova. Publicado em: 2004-04
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11. Validation of analytical methodologies for quantitative determination of drugs in pharmaceutical formulations employeds to chemical "peelings" / Validação de metodologias analíticas para determinação quantitativa de princípios ativos em formulações farmacêuticas empregadas para "peelings" químicos
Os "peelings" químicos são formulações esfoliantes utilizadas na terapêutica de queratoses actínicas, rugas, discromias pigmentares, acne vulgar e rosácea. A solução de Jessner (SJ) é amplamente usada como agente em peelings químicos. Na presente pesquisa foram empregadas formulações farmacêuticas de SJ como amostras para a determinação quant
Publicado em: 2004
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12. A mass transfer model applied to the supercritical extraction with CO2 of curcumins from turmeric rhizomes (Curcuma longa L)
Increasing restrictions on the use of artificial pigments in the food industry, imposed by the international market, have increased the importance of raw materials containing natural pigments. Of those natural substances with potential applications turmeric rhizomes (Curcuma longa L), are one of the most important natural sources of yellow coloring. Three di
Brazilian Journal of Chemical Engineering. Publicado em: 2000-09