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Showing 1 to 20 of 31 for “"saponification"”.
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An Investigation of Solvent Effects on the Saponification Rates of Aliphatic Esters
No abstract prepared.
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Desenvolvimento de um sistema terapêutico emulsionado para uso oral a base de óleo de rã-touro (Rana catesbeiana Shaw)
… characterized and peroxide, acidity, iodine and saponification values were respectively 1.92 meq O2 / kg; 2.95 KOH / g oil; 104.2 g of I / 100 g oil and 171.2 mg KOH / g of oil. The gas chromatography-mass spectrometry (GC / MS) was used to determine the compounds present in the bullfrog oil. The …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΩΝ ΧΗΜΙΚΩΝ ΣΥΣΤΑΤΙΚΩΝ ΤΗΣ URGINEA MARITIMA BAKER
… ETHER EXTRACT HAVE BEEN ISOLATED (AFTER SAPONIFICATION) AND IDENTIFIED; B. SITOSTEROL AND B-CAROTENE (IN THE UNSAPONIFIABLE MATTER), PALMITIC, PALMITOLEIC, STEARIC, OLEIC, LINOLEIC, AND LINOLENICACIDS. (SHORTENED)
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Bioprospek nyamplung (Callophyllum inophyllum L.) dan kapuk randu (Ceiba pentandra Gaetn) sebagai bahan baku biodiesel
… chemical tests include acid number, iodine and saponification numbers. Data obtained from this study is descriptive exploratory study. The results of this study indicate that the oil content of plants nyamplung higher than the kapok -44.983% 36.743% while the content of the kapok ranged …
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Biodiesel production from coconut oil
… 3 h was required before alkali addition to avoid saponification of the free fatty acids. By comparison, a longer reaction time (50 h) was required for the acid process which also resulted in a lower conversion (67% at 50oC). The use of an acid overcomes the limitations of the alkali process of …
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A Comprehensive Study and Mechanism Investigation for Alkaline-Heavy Oil Recovery Process
… study is its mechanism investigation and saponification rate examination. In this study, a modified bottle test method that assesses major emulsion type formation for preliminary prediction of alkaline flooding performance in oil recovery is introduced. Homogenization and Karl-Fischer …
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Determination of fatty acid composition of oils by mass spectrometry
… oil, palm oil and sunflower oil using GC-MS. Saponification was used as the first step in sample preparation and then I prepared the free fatty acid. HCl and Methanol is added to the sample to produce the FAMEs (Fatty acid methyl esters) done by acid catalyzed process. After this I identified …
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Liquid-liquid extraction of carotenoids from palm oil (Elaeis guineensis)
… (IV), Peroxide Value (PV), Moisture Content, Saponification Value (SV) and Impurity Content. The crude and degummed palm oil results were, respectively, (a) acid value (mg KOH/g) from 2.79 ± 0.21 and 4.31 ± 0.06, (b) peroxide value (mEq/kg) of 3.82 ± 0.03 and 1.91 ± 0.01, (c) iodine value (g …
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Synthesis and Application of Boronic Acid Derivatives
… compounds using Cu(I) as catalyst, °-alkylation, saponification/hydrogenation, amidation, and oxidative removal of pinacolyl group with sodium periodate. A simple amidoboronic acid was also synthesized for stability studies. This compound, synthesized in 44% overall yield, could be used as a …
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Funktionalisierung von 6H-1,2-Oxazinen durch 1,3-dipolare Cycloadditionen und Halogenierungen
… cis-configurated α-hydroxynitriles (saponification and decarboxylation) was demonstrated. Finally, the 4-chloro- and 4-bromo-6H-1,2-oxazines were prepared in good yields. Investigations with palladium catalysed coupling reactions were initiated. The halogen of 4-bromo-6H-1,2-oxazines …
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Desenvolvimento de catalisador heterogêneo para produção de biodiesel a partir do óleo de algodão
… the tests acid value, moisture content and the saponification index showing the acidity value a little above the 2 mg KOH / g of oil, as well as the moisture content above 0.5% and had a viscosity of 33,37mm2 / s. The transesterification reactions were performed in a parr reactor (working at …
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Hypercoiling and hydrophobically associating polymers : interfacial synthesis, surface properties and pharmaceutical applications
… balance could be modified by partial saponification (66-75%) of the ethyl ester side chains. Surface or interfacial tension/pH profiles were used to assess the conformation of both the poly(isophthalamides) and partially saponified PLETESA in aqueous solution. The results demonstrated …
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A kinetic study of the base catalyzed esterification of propionic anhydride with isopropyl and n-propyl alcohols using a high frequency oscillometer
… (Asada 1954; Duke, Bever, and Diehl 1949), a saponification reaction has been followed (Jensen, Watson, and Beekham 1951), and rates for the hydrolysis of lower aliphatic esters and esters of chloracetic acid have been measured (Elving 1954; Flom and Elving 1953).</p> <p>The published kinetic …
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Enzymatic acylation of starch
… esters have traditionally been analysed by saponification and back-titration, however this method was found to be unreliable. Quantification through integration of 1H-NMR peaks, was also found problematic for low degrees of substitution (DS, mol acyl group per mol anhydroglucose). Therefore …
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Wax extraction and characterization from full-fat and defatted rice bran
… as intact WE using a mass analyzer. After saponification of WE, alcohols, sterols, and fatty acids were analyzed by GC. Crude FFRBO yields were not significantly different among the extraction methods, while MAE (isopropanol, 120°C) showed significantly higher DFRBO yields. DFRBOs had …
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Self-Structuring of functionalized micro- and mesoporous organosilicas using boron-silane-precursors
… these moieties (e.g. by ammonolysis or oxidative saponification) yields an organosilica where all functionalities are exclusively located at the pore wall and therefore accessible. The accessibility of the functionalities is a vital point for applications and is not necessarily granted for common …
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Synthesis, Chemistry, Biological Evaluation And Structure-Activity Relationships Of Rac- And Chiral 6-Desmethyl-5Β –Hydroxy-D-Secoartemisinin And Analogs
… diastereomers of the title compound folloby saponification into the (3R, 5R, 5aR, 9aS) and (3S, 5S, 5aS, 9aR) enantiomeric alcohols. It was found that all activity was associated with the (3R, 5R, 5a R, 9aS) diastereomer. This mirror image overlays with the x-ray structure of the natural …
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Synthesis of a triglyceride containing a lactonizable hydroxy fatty acid and investigations into the behavior of this triglyceride and related lactones with application to the analysis of beef tallow
… official American Oil Chemists Society method (saponification followed by BF$\sb3$-MeOH), acid-catalyzed transesterification and base-catalyzed transesterification with potassium hydroxide and sodium methoxide. Derivatized 5-hydroxy methyl dodecanoate, tetradecanoate and hexadecanoate were …
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