10 documents found, page 1 of 1
Effects of Citrus Sudden Death Disease on Fatty Acid Profile of Orange Tree Bark
Prestes,Rosilene A.; Colnago,Luiz A.; Carrilho,Emanuel; Antoniosi Filho,Nelson R.; Alves,Maria Isabel R.Citrus sudden death (CSD) is a disease that has affected millions of orange trees in Brazil, leading to economic losses in the order of billions of US dollars. This article examines the effects of CSD on the fatty acid composition of triacylglycerides (TAG) extracted from rootstock and scion bark. The fatty acid profile determined by gas chromatography showed a reduction in oleic and linolenic acids, and an inc...
Synthesis of Antioxidant Additive from Safflower Seed Oil
Vieira,Maríthiza G.; Batista,Lilian R.; Muniz,Aline S.; Lichston,Juliana E.; Oliveira,Angelo R. S.; César-Oliveira,Maria A. F.Several published studies have evaluated the problems associated with the utilization of biodiesel obtained from safflower (Carthamus tinctorius L.) oil due to the low oxidative stability, caused by the high content of unsaturated fatty acids. Thus, this study aimed at the extraction of safflower seed oil and its use as an unsaturation source to obtain a synthetic antioxidant. The synthesis of this phenolic add...
Evaluation of the Metabolic Profile of Arabica Coffee via NMR in Relation to th...
Alves,Roger P.; Antoniosi Filho,Nelson R.; Lião,Luciano M.; Flores,Igor S.Coffee is one of the most popular and consumed products in the world, with high nutritional value and economic importance. However, some factors can change the organoleptic properties of a coffee species, without causing significant damage such as loss of important components. The present study evaluated the chemical profile, via nuclear magnetic resonance (NMR), of the main biological properties and substances...
Ethanol Content Determination in Medicine Syrups Using Headspace and Multidimen...
Batista,Lilian R.; Antoniosi Filho,Nelson R.Despite the efforts of the pharmaceutical industry to reduce the ethanol content in medicines, many of these products are still commercially available. These medicines must be monitored by quality control techniques using accurate method. Therefore, this study proposes to develop and validate an analytical method for ethanol quantification in adult and pediatric syrups, in order to guarantee the safety of medic...
Nature of Insoluble Material Found in the Bottom of Soybean Biodiesel Storage T...
Cazarolli,Juciana C.; Boelter,Gabriela; Lima,Amanda M. D. L. de; Hengles,Thaisa; Correa,Camila; Peralba,Maria C. R.; Ferrão,Marco F.During biodiesel storage, chemical reactions may occur, producing sludges. The aim of this study was to characterize the chemical and microbial composition of the sludge found in a biodiesel storage tank. The material was collected in a biodiesel production plant. The sludge chemical characterization was performed by Fourier transform infrared (FTIR) spectroscopy, flame atomic absorption spectroscopy (FAAS), ga...
DESENVOLVIMENTO DE ENSAIO PARA ANÁLISE QUALITATIVA DE BIODIESEL EM MISTURAS DIE...
Silva,Marcos A. A.; Borges,Adhane T. D.; Antoniosi Filho,Nelson R.In this study, we developed a method for the visual detection of biodiesel in petrodiesel-biodiesel (BX) blends through the aminolysis of the methyl or ethyl esters of fatty acids that are found in biodiesel and that are absent from diesel and vegetable oils. This method is based on three reactional stages, which produce a dark red and easily visualized complex in the presence of biodiesel. In the absence of bi...
Improvement of the Extraction Process for High Commercial Value Pigments from D...
Soares,Aline T.; Marques Júnior,Jair G.; Lopes,Rafael G.; Derner,Roberto B.; Antoniosi Filho,Nelson R.Considering the high interest and commercial value of pigments from microalgae, this study aimed to stablish the best lutein and β-carotene extraction method for Desmodesmus sp., a microalgae with high biomass production. The evaluation was done considering the best solvent or solvent mixture, number of extractions, pre-treatment of dry biomass with acetone, saponification in methanol and ethanol and stability ...
ANÁLISE COMPARATIVA DO CONTEÚDO EM ESTEROIDES LIVRES DE DIFERENTES ÓLEOS, GORDU...
Bezerra,Kelly da S.; Antoniosi Filho,Nelson R.In this study, the percentage content of free steroid in oils, fats and biodiesel was analyzed. For this, the saponification reaction on a microscale was used, and this procedure for extraction of unsaponifiable fraction was studied in several experimental steps. After the process of saponification, the unsaponifiable fraction was analyzed by gas chromatography with flame ionization detector, where all steroids...
Characterization and quantification by gas chromatography of free steroids in u...
Bezerra,Kelly da S.; Antoniosi Filho,Nelson R.The study of free steroids and their use in oil characterization is interesting because the distribution of these steroids varies from one oil to another. Although several papers analyze the most abundant steroids in oils, studies including less common steroids are scarce. Free steroids were extracted from unsaponifiable fraction using the saponification reaction adapted micro-scale. After extraction, steroids ...
Degradation of the commercial herbicide glyphosate by photo-fenton process: eva...
Souza,Danilo R. de; Trovó,Alam G.; Antoniosi Filho,Nelson R.; Silva,Marcos A. A.; Machado,Antonio E. H.Parameters that influence the efficiency of the degradation of glyphosate (addition of Fe2+, simultaneous addition of Fe2+ and Fe3+ at a 1:1 (Fe2+/Fe3+) molar ratio, addition of oxalate and of H2O2) were evaluated at lab-scale. Synergic effects on its degradation and release of phosphate were observed using Fe2+/Fe3+, as well as adding oxalate. On the other hand, the concentration increase of Fe2+/Fe3+, oxalate...