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Showing 1 to 20 of 54 for “"Vanillin"”.
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A possible condensation of guaiacol, vanillin and sucrose
… Risi and A. Labrie (1) found that guaiacol and vanillin were among the products derived from the sap of the sugar maple. By using a five percent sucrose solution and equal quantities of vanillin and guaiacol, a little calcium malate and manganese acetate, they obtained an amorphous powder …
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Synthesis of novel vanillin derivatives: study of their antioxidant and potential neuroprotective properties.
Vanillin (4-hydroxy-3-methoxybenzaldehyde) is a naturally-occurring phenolic compound, forming the main component of the bean and pod of vanilla orchids. It is widely used as a flavouring agent in food and drinks, and as a preservative in the cosmetic and pharmaceutical industries. In the past …
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A New Method for the Analysis of Carbohydrates by Means of Vanillin in Acid Medium
Sugars have probably been looked upon with more interest than any other class of organic compounds. From the analytical standpoint there has been an abundant amount of excellent work. Brown and Zerban (l) mention that the analysis of sugars with phenols and hydrochloric acid frequently offers a …
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Analogue enrichment of aromatic degradation through application of lignin-derived phenols
… naturally occurring lignin-derived phenols (13C-vanillin substrates). The influence of vanillin substrates on the 13C-signatures as identified on the 16S rRNA gene profiles present in the bacterial population were explored using metagenomic procedures _ primarily based on DNA stable isotope …
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Biological Activity of Phenolics in Chicks and Rats
… levels compared with controls. Rats fed 0.5% vanillin, 0.5% vanillic acid, 0.5% ferulic acid or 0.5% para-coumaric acid had hepatic lipid levels similar to controls. However, 1% vanillin and 1% vanillic acid depressed lipid accumulation in rats compared to controls. Chicks fed 0.5% vanillin, …
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Interactions of Phenolic Monomers With Digestion and Metabolism
… and p-hydroxybenzaldehyde, syringaldehyde and vanillin in alkali extracts and products of nitrobenzene oxidation. Intact roughages and isolated cell walls were examined. Most alkali-labile phenolics were present in both the cell soluble and cell wall fractions, whereas nitrobenzene oxidation …
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Certain coloring matters derived from vanallin and methyl salicylate
… a number of coloring matters by condensing vanillin with para-methoxyacetophenone, meta-nitroacetophenone, and para-bromoacetophenone, and to prepare another group by condensing methyl salicylate with acetophenone, para-methoxyacetophenone, meta-nitroacetophenone, and …
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Nanoporous Calcium Carbonate-Based Substrates for the Controlled Delivery of Functional Materials
… (Na2NS). However, it was found that vanillin adsorbs onto the FCC in an amount of 2.00 ± 0.59 mg g^-1. Aspirin and vanillin adsorption from ethanolic solutions with various additions of water onto FCC TP was investigated and fitted with the Tóth isotherm. It was estimated that …
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Development of Green Subcritical Water Separation Technology
… subcritical water conditions. The stability of vanillin and coumarin in subcritical water was studied at 100-250 C. Vanillin was stable up to 60 min at all temperatures tested. While coumarin was stable at temperatures up to 150 C, it started to degrade at 200 and 250 C after heating for 60 …
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Lignin Transformation and Characterization of Pyrolytic Products
… value-added aromatic monomers (e.g., guaiacol, vanillin, acetovanillone, and eugenol) for synthesis of polymers is of interest. Mineral bases, such as NaOH and CsOH, or supported-metal catalysts (Pt, Ru, Pd, and Ni on C) have been used to form aromatic monomers, but associated drawbacks are …
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Development and Application of An Integrated GC-MS/MS and GC-IRMS Analytical Approach in Food Quality Evaluation
… vanilla products have concentrated primarily on vanillin, the main compound responsible for the characteristic aroma of vanilla. However, vanilla extracts contain numerous other aromatic constituents that may also provide valuable information for authenticity assessment. In this work, the …
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Structure and Utilization of Cell Walls of Normal and Brown Midrib Mutant Sorghum X Sudangrass Hybrids
… of alkali-labile phenolics, which included vanillin and the cis and trans isomers of p-coumaric and ferulic acids, required less than 15 minutes. High resolution gas chromatography, utilizing a phenylmethyl-fused silica column, was found to provide a relatively low cost, rapid and sensitive …
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Deamidation of soy protein by protein-glutaminase: Process evaluation and effect of deamidation on protein functional properties and flavor-protein interactions
… selected carbonyl containing flavor compounds (vanillin and maltol). The thermodynamic parameters of binding indicated that the flavor-protein interactions were spontaneous and that the nature of the interactions shifted from entropy to enthalpy driven after deamidation. Deamidation of soy …
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Quantification and Reduction of Exposure to Residential Woodsmoke Particulate Matter
… dehydroabietic acid, abietic acid, vanillin, acetovanillone, guaiacol, and 4-ethylguaiacol) in particulate matter. This method was used to analyze particulate matter collected in Libby, MT, a community where woodsmoke is the predominant component of the particulate matter, before, …
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Quantification and Reduction of Exposure to Residential Woodsmoke Particulate Matter
… dehydroabietic acid, abietic acid, vanillin, acetovanillone, guaiacol, and 4-ethylguaiacol) in particulate matter. This method was used to analyze particulate matter collected in Libby, MT, a community where woodsmoke is the predominant component of the particulate matter, before, …
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Understanding the complex aroma chemistry of premium aged rums
… (smoky, spicy), (E)-isoeugenol (floral, clove), vanillin (vanilla, sweet-like), ethyl vanillate (vanilla, sweet-like), and syringaldehyde (vanilla). Thirty-four of the compounds identified by GCO and AEDA were quantitated by stable isotope dilution analysis. Differences among the samples included …
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Processi di biorefining per l'estrazione di secondary chemical building blocks da sottoprotti dell'agro-industria
… such as food additives and flavours (i.e. vanillin), fine chemicals (i.e. non-steroidal anti-inflammatory drugs such as ibuprofen or flurbiprofen) and polymers (i.e. poly p-vinylphenol, a photosensitive polymer for electronic and optoelectronic applications). European agrifood waste …
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