Category: 763-69-9

Biodegradation of volatile organic compounds by five fungal species was written by Qi, B.;Moe, W. M.;Kinney, K. A.. And the article was included in Applied Microbiology and Biotechnology in 2002.SDS of cas: 763-69-9 The following contents are mentioned in the article:

Five fungal species, Cladosporium resinae (ATCC 34066), Cladosporium sphaerospermum (ATCC 200384), Exophiala lecanii-corni (CBS 102400), Mucor rouxii (ATCC 44260), and Phanerochaete chrysosporium (ATCC 24725), were tested for their ability to degrade nine compounds commonly found in industrial off-gas emissions. Fungal cultures inoculated on ceramic support media were provided with volatile organic compounds (VOCs) via the vapor phase as their sole carbon and energy sources. Compounds tested included aromatic hydrocarbons (benzene, ethylbenzene, toluene, and styrene), ketones (Me Et ketone, Me iso-Bu ketone, and Me Pr ketone), and organic acids (Bu acetate, Et 3-ethoxypropionate). Experiments were conducted using three pH values ranging from 3.5 to 6.5. Fungal ability to degrade each volatile organic compound (VOC) was determined by observing the presence or absence of visible growth on the ceramic support medium during a 30-day test period. The results indicate that E. lecanii-corni and C. sphaerospermum can readily utilize each of the nine VOCs as a sole carbon and energy source. P. chrysosporium was able to degrade all VOCs tested except for styrene under the conditions imposed. C. resinae was able to degrade both organic acids, all of the ketones, and some of the aromatic compounds (ethylbenzene and toluene); however, it was not able to grow utilizing benzene or styrene under the conditions tested. With the VOCs tested, M. rouxii produced visible growth only when supplied with Bu acetate or Et 3-ethoxypropionate. Maximum growth for most fungi was observed at a pH of approx. 5.0. The exptl. protocol utilized in these studies is a useful tool for assessing the ability of different fungal species to degrade gas-phase VOCs under conditions expected in a biofilter application. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9SDS of cas: 763-69-9).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.SDS of cas: 763-69-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yeast volatomes differentially affect larval feeding in an insect herbivore was written by Ljunggren, Joel;Borrero-Echeverry, Felipe;Chakraborty, Amrita;Lindblom, Tobias U. T.;Hedenstroem, Erik;Karlsson, Maria;Witzgall, Peter;Bengtsson, Marie. And the article was included in Applied and Environmental Microbiology in 2019.Application In Synthesis of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Yeasts form mutualistic interactions with insects. Hallmarks of this interaction include provision of essential nutrients, while insects facilitate yeast dispersal and growth on plant substrates. A phylogenetically ancient chem. dialogue coordinates this interaction, where the vocabulary, the volatile chems. that mediate the insect response, remains largely unknown. Here, we used gas chromatog.-mass spectrometry, followed by hierarchical cluster and orthogonal partial least-squares discriminant analyses, to profile the volatomes of six Metschnikowia spp., Cryptococcus nemorosus, and brewer’s yeast (Saccharomyces cerevisiae). The yeasts, which are all found in association with insects feeding on foliage or fruit, emit characteristic, species-specific volatile blends that reflect the phylogenetic context. Species specificity of these volatome profiles aligned with differential feeding of cotton leafworm (Spodoptera littoralis) larvae on these yeasts. Bioactivity correlates with yeast ecol.; phylloplane species elicited a stronger response than fruit yeasts, and larval discrimination may provide a mechanism for establishment of insect-yeast associations The yeast volatomes contained a suite of insect attractants known from plant and especially floral headspace, including (Z)-hexenyl acetate, Et (2E,4Z)-deca-2,4-dienoate (pear ester), (3E)-4,8-dimethylnona-1,3,7-triene (DMNT), linalool, 伪-terpineol, 尾-myrcene, or (E,E)-伪-farnesene. A wide overlap of yeast and plant volatiles, notably floral scents, further emphasizes the prominent role of yeasts in plant-microbe-insect relationships, including pollination. The knowledge of insect-yeast interactions can be readily brought to practical application, as live yeasts or yeast metabolites mediating insect attraction provide an ample toolbox for the development of sustainable insect management. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Application In Synthesis of Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Application In Synthesis of Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

The pyrolysis of tobacco ingredients was written by Baker, Richard R.;Bishop, Louise J.. And the article was included in Journal of Analytical and Applied Pyrolysis in 2004.Quality Control of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Relationships between tobacco components and smoke products are complex and often difficult to unravel. Pyrolysis experiments have commonly been used to establish such relationships. However, unless they are performed under dynamic conditions that are relevant to those that occur during tobacco burning, results can be obtained which have little resemblance to those obtained during cigarette smoking. The relevance of pyrolysis experiments to the behavior of tobacco ingredients in a burning cigarette is considered. Based on the temperature, heating rate, oxygen levels and gas flow conditions that occur inside the burning zone of a cigarette, together with a review of relevant pyrolysis and smoking experiments, a set of pyrolysis conditions has been developed that approximates those occurring in the pyrolysis region of the burning cigarette. The conditions include heating the sample at 30掳 s^-1 from 300 to 900掳 under a flow of 9% oxygen in nitrogen. Experiments on the pyrolytic behavior of eleven relatively volatile substances under these conditions give results that are in good agreement with results from thirteen published studies in which cigarettes incorporating labeled versions of the substances were smoked. Subsequently, 291 single-compound tobacco ingredients have been pyrolyzed under this set of conditions, most of which are relatively volatile. This enables the behavior of these ingredients in a burning cigarette to be estimated in terms of intact transfer to mainstream smoke vs. pyrolytic decomposition It is predicted that almost a third of the substances would transfer to mainstream smoke at least 99% intact, and almost two-thirds would transfer 95% intact. Where pyrolytic decomposition does occur, the products are listed together with an estimate of the levels in smoke that would arise from the ingredient. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Quality Control of Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Quality Control of Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

A predictive solubility tool for pesticide emulsifiable concentrate formulations was written by Kozuki, Y.;Ohtsubo, T.. And the article was included in ASTM Special Technical Publication in 2009.Related Products of 763-69-9 The following contents are mentioned in the article:

Emulsifiable concentrates (ECs) are one of the most widely used pesticide formulations because they have a lot of advantages, such as good storage stability, relatively high biol. activity, easy weighing, easy production, and so on. An EC is normally prepared by dissolving a pesticide in a nonpolar solvent with surfactants. When a pesticide is hardly soluble in a common nonpolar solvent, a polar solvent is used as a co-solvent. One of the preferred polar solvents, which have been used for this purpose is N-methyl-2-pyrrolidone (NMP). However, because of its toxic profile, which has recently become apparent, the com. use of. NMP is recently restricted in many fields. Under the circumstances, it is desirable to look for an alternative solvent in the pesticide formulation area. The organic conceptual diagram was tried to search for the alternative solvents because it is a useful tool for predicting the physico-chem. properties of an organic compound In the organic conceptual diagram, the physico-chem. properties are expressed by the combination of the organic value (OV) and the inorganic value (IV). According to the theory, organic compounds that have similar IV/OV ratios (the inorganic organic balance=IOB) are mutually miscible in each other. In order to investigate the applicability of this concept to search for a suitable solvent for a pesticide that is hardly soluble in nonpolar solvents, the relationship of the IOB between two hardly soluble pesticides (i.e., a neonicotinoid insecticide and an herbicide) and several types of solvents was evaluated. As expected, solvents having an IOB close to the targeted pesticide showed high solvency against it, while the pesticide did not dissolve in solvents, which have an IOB farther off. It was demonstrated that the organic conceptual diagram can be a good tool for the selection of a solvent for a pesticide that is hardly soluble in the usual nonpolar solvents. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Related Products of 763-69-9).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Related Products of 763-69-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

A predictive solubility tool for pesticide emulsifiable concentrate formulations was written by Kozuki, Y.;Ohtsubo, T.. And the article was included in Journal of ASTM International in 2009.Name: Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

Emulsifiable concentrates (ECs) are one of the most widely used pesticide formulations because they have a lot of advantages, such as good storage stability, relatively high biol. activity, easy weighing, easy production, and so on. An EC is normally prepared by dissolving a pesticide in a nonpolar solvent with surfactants. When a pesticide is hardly soluble in a common nonpolar solvent, a polar solvent is used as a cosolvent. One of the preferred polar solvents, which have been used for this purpose, is N-methyl-2-pyrrolidone (NMP). However, because of its toxic profile, which has recently become apparent, the com. use of NMP is recently restricted in many fields. Under the circumstances, it is desirable to look for an alternative solvent in the pesticide formulation area. The organic conceptual diagram was tried to search for the alternative solvents because it is a useful tool for predicting the physicochem. properties of an organic compound In the organic conceptual diagram, the physicochem. properties are expressed by the combination of the organic value (OV) and the inorganic value (IV). According to the theory, organic compounds that have similar IV/OV ratios (the inorganic organic balance = IOB) are mutually miscible in each other. In order to investigate the applicability of this concept to search for a suitable solvent for a pesticide that is hardly soluble in nonpolar solvents, the relation of the IOB between 2 hardly soluble pesticides (i.e., a neonicotinoid insecticide and an herbicide) and several types of solvents was evaluated. As expected, solvents having an IOB close to the targeted pesticide showed high solvency against it while the pesticide did not dissolve in solvents, which have an IOB farther off. The organic conceptual diagram can be a good tool for the selection of a solvent for a pesticide that is hardly soluble in the usual nonpolar solvents. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Name: Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Name: Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Control of polymer colloidal crystal structure and orientation on patterned substrates by electrophoresis was written by Dziomkina, Nina V.;Hempenius, Mark A.;Vancso, G. Julius. And the article was included in Proceedings of SPIE-The International Society for Optical Engineering in 2005.Synthetic Route of C7H14O3 The following contents are mentioned in the article:

The method of electrophoretic deposition of charged polymer (polystyrene) microspheres on topol. patterned substrates is discussed. Surface patterning with different symmetries and structure periodicity in the sub-micrometer range over large surface areas was realized by laser interference lithog. Growth of colloidal crystals on patterned and bare electrode surfaces was compared. Surface patterning predetermined the colloidal crystal structure and orientation. Fcc colloidal crystals with (111), (100) and (110) crystal plane orientations parallel to the electrode surfaces were successfully grown on patterned electrodes with the corresponding pattern symmetry. The growth of colloidal crystals with (111) and (100) crystal plane orientations parallel to the electrode surface was easily controlled by patterned surfaces, while only two layers of colloidal crystals having the (110) plane orientation parallel to the electrode surface were grown in a controlled way. The growth of thick colloidal crystals in the non-close-packed [110] direction generated a mixture of small domains of different orientations, where domains with (111) and (100) orientations dominated. The thickness of the colloidal crystals was controlled by varying the deposition parameters. Thickness increased with increasing the applied voltage, deposition time, concentration of colloidal particles and with decreasing the withdrawal speed of the electrodes from the colloidal suspension. A threshold voltage of 3.36 V was determined, beyond which a significant increase in the thickness of the colloidal crystals with applied voltage was observed A gradient in the thickness of the colloidal crystals was obtained across the electrode surface at low withdrawal speed (0.04 mm/s). Colloidal crystals with a homogeneous thickness over the electrode area were formed at withdrawal speeds of 0.07 – 0.1 mm/s. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Synthetic Route of C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Synthetic Route of C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Multispecies QSAR Modeling for Predicting the Aquatic Toxicity of Diverse Organic Chemicals for Regulatory Toxicology was written by Singh, Kunwar P.;Gupta, Shikha;Kumar, Anuj;Mohan, Dinesh. And the article was included in Chemical Research in Toxicology in 2014.Recommanded Product: Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

The research aims to develop multispecies quant. structure-activity relationships (QSARs) modeling tools capable of predicting the acute toxicity of diverse chems. in various Organization for Economic Co-operation and Development (OECD) recommended test species of different trophic levels for regulatory toxicol. Accordingly, the ensemble learning (EL) approach based classification and regression QSAR models, such as decision treeboost (DTB) and decision tree forest (DTF) implementing stochastic gradient boosting and bagging algorithms were developed using the algae (P. subcapitata) exptl. toxicity data for chems. The EL-QSAR models were successfully applied to predict toxicities of wide groups of chems. in other test species including algae (S. obliguue), daphnia, fish, and bacteria. Structural diversity of the selected chems. and those of the end-point toxicity data of five different test species were tested using the Tanimoto similarity index and Kruskal-Wallis (K-W) statistics. Predictive and generalization abilities of the constructed QSAR models were compared using statistical parameters. The developed QSAR models (DTB and DTF) yielded a considerably high classification accuracy in complete data of model building (algae) species (97.82%, 99.01%) and ranged between 92.50%-94.26% and 92.14%-94.12% in four test species, resp., whereas regression QSAR models (DTB and DTF) rendered high correlation (R²) between the measured and model predicted toxicity end-point values and low mean-squared error in model building (algae) species (0.918, 0.15; 0.905, 0.21) and ranged between 0.575 and 0.672, 0.18-0.51 and 0.605-0.689 and 0.20-0.45 in four different test species. The developed QSAR models exhibited good predictive and generalization abilities in different test species of varied trophic levels and can be used for predicting the toxicities of new chems. for screening and prioritization of chems. for regulation. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Recommanded Product: Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Recommanded Product: Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Madeira wine ageing prediction based on different analytical techniques: UV-vis, GC-MS, HPLC-DAD was written by Pereira, Ana C.;Reis, Marco S.;Saraiva, Pedro M.;Marques, Jose C.. And the article was included in Chemometrics and Intelligent Laboratory Systems in 2011.Formula: C7H14O3 The following contents are mentioned in the article:

The present work aims to analyze the feasibility of different anal. measurement procedures for Madeira wine ageing prediction. In order to properly identify and quantify the chem. compounds qualified for characterizing wine evolution during the ageing period, chromatog. and spectroscopic analyses were carried out. Twenty-six samples, representative of ten harvest years and covering an ageing period of 20 years, were analyzed in terms of their volatile and phenolic composition, as well as characterized in terms of absorbance measurements in the UV and Visible region. Then, multivariate prediction models were established by applying PLS regression to each chem. data set, after which they were compared in terms of their ageing prediction ability. The optimum number of PLS dimensions to consider in each estimated model was obtained based on the minimization of the root mean squared error of Monte Carlo validation. With such estimated models, the prediction interval estimates based on the bootstrap percentile approach were also computed for the available samples, in order to test model’s prediction ability, once each sample is successively removed from the data set. Our anal. shows that Madeira wine age, produced from a known grape variety, can be predicted with good accuracy from its volatile and phenolic composition, as well as from UV-vis absorbance measurements. The PLS models estimated are able to predict wine age with a root mean square error of 0.9, 1.1, and 1.4 years, resp. The sample-specific prediction intervals computed also allowed for the anal. of differences between observed and predicted values, and confirmed the interesting wine age prediction abilities of the proposed methodologies. A compromise between model accuracy and cost of anal. can be established in order to decide which methodol. to use, according to the particular application scenario, as the more time-consuming and complex techniques (GC-MS and HPLC-DAD) are also those leading to more accurate results, but UV-vis also enabled us to come up with acceptable age predictions. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Formula: C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Formula: C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Evaluation of inhalation TTC values with the database RepDose was written by Escher, S. E.;Tluczkiewicz, I.;Batke, M.;Bitsch, A.;Melber, C.;Kroese, E. D.;Buist, H. E.;Mangelsdorf, I.. And the article was included in Regulatory Toxicology and Pharmacology in 2010.Application In Synthesis of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:

The thresholds of toxicol. concern (TTCs) define limit values for substances of unknown toxicity below which dietary intake is considered to be of no concern to human health. The TTC concept has already been used for risk assessment of e.g. food contaminants or flavoring substances and is in discussion to be applied to other classes of compounds such as cosmetic ingredients, household products, non-relevant metabolites in drinking water, and impurities in pharmaceuticals. The present publication aimed to evaluate whether the current TTC concept can also be applied to define limit values for inhalation exposure, using a data set of 203 industrial chems. from the database RepDose. It has been shown, that the NOEC values in classes 1, 2, and 3 are distributed over six orders of magnitude resulting in a considerable overlap between the distribution curves for the three classes. Inhalation thresholds for Cramer classes 1 (compounds likely to be of low-toxicity), 2 (compounds likely to be of moderate toxicity), and 3 (compounds suspect for high toxicity) were analyzed close to the approach described by Munro for oral TTCs. The 5th percentiles NOEC of Cramer classes 1-3 result in thresholds of 1.5 脳 10^-3 ppm for Cramer class 1 and 2.2 脳 10^-5 ppm for Cramer class 3. A threshold could not be derived for class 2 because of the small number of compounds available. If calculated as body doses, the inhalation thresholds for classes 1 and 3 (71 and 4 渭g/person/d, resp.) are considerably lower than the oral thresholds derived by Munro (1800 and 90 渭g/person/d). It has been shown that one reason for this difference is the high sensitivity of the respiratory tract to local effects. In a next step, the values obtained were further refined. If organophosphates or compounds with structural alerts for genotoxicity are excluded, the TTC in Cramer class 1 increases, whereas the TTC in Cramer class 3 remains the same. Based on these analyses two inhalation TTCs for non-genotoxic compounds are proposed: 3.6 脳 10^-3 ppm (180 渭g/person/d) for Cramer class 1 and 2.4 脳 10^-5 ppm (4 渭g/person/d) for Cramer class 3. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Application In Synthesis of Ethyl 3-ethoxypropanoate).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Application In Synthesis of Ethyl 3-ethoxypropanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Characterization of the volatile profile of Brazilian Merlot wines through comprehensive two dimensional gas chromatography time-of-flight mass spectrometric detection was written by Welke, Juliane Elisa;Manfroi, Vitor;Zanus, Mauro;Lazarotto, Marcelo;Alcaraz Zini, Claudia. And the article was included in Journal of Chromatography A in 2012.COA of Formula: C7H14O3 The following contents are mentioned in the article:

Wine aroma is an important characteristic and may be related to certain specific parameters, such as raw material and production process. The complexity of Merlot wine aroma was considered suitable for comprehensive two-dimensional gas chromatog. (GC 脳 GC), as this technique offers superior performance when compared to one-dimensional gas chromatog. (1D-GC). The profile of volatile compounds of Merlot wine was, for the first time, qual. analyzed by HS-SPME-GC 脳 GC with a time-of-flight mass spectrometric detector (TOFMS), resulting in 179 compounds tentatively identified by comparison of exptl. GC 脳 GC retention indexes and mass spectra with literature 1D-GC data and 155 compounds tentatively identified only by mass spectra comparison. A set of GC 脳 GC exptl. retention indexes was also, for the first time, presented for a specific inverse set of columns. Esters were present in higher number (94), followed by alcs. (80), ketones (29), acids (29), aldehydes (23), terpenes (23), lactones (16), furans (14), sulfur compounds (9), phenols (7), pyrroles (5), C13-norisoprenoids (3), and pyrans (2). GC 脳 GC/TOFMS parameters were improved and optimal conditions were: a polar (polyethylene glycol)/medium polar (50% Ph 50% di-Me arylene siloxane) column set, oven temperature offset of 10 掳C, 7 s as modulation period and 1.4 s of hot pulse duration. Co-elutions came up to 138 compounds in ¹D and some of them were resolved in ²D. Among the co-eluted compounds, thirty-three volatiles co-eluted in both ¹D and ²D and their tentative identification was possible only due to spectral deconvolution. Some compounds that might have important contribution to aroma notes were included in these superimposed peaks. Structurally organized distribution of compounds in the 2D space was observed for esters, aldehydes and ketones, alcs., thiols, lactones, acids and also inside subgroups, as occurred with esters and alcs. The Fischer Ratio was useful for establishing the analytes responsible for the main differences between Merlot and non-Merlot wines. Differentiation among Merlot wines and wines of other grape varieties were mainly perceived through the following components: Et dodecanoate, 1-hexanol, Et nonanoate, Et hexanoate, Et decanoate, dehydro-2-methyl-3(2H)thiophenone, 3-Me butanoic acid, Et tetradecanoate, Me octanoate, 1,4 butanediol, and 6-methyloctan-1-ol. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9COA of Formula: C7H14O3).

Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.COA of Formula: C7H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics