Tag: M.W=150-200

Liu, Fangtian published the artcileChanges of terpenoids and other volatiles during alcoholic fermentation of blueberry wines made from two southern highbush cultivars, Product Details of C10H20O2, the main research area is terpenoid blueberry wine volatile alc fermentation.

Aroma is one of the most important aspects to determine the wine quality and its market value. Changes of volatile profiles and terpenoid precursors were monitored for blueberry wines made from two different southern high bush cultivars (Misty and O’Neal) during the alc. fermentation using solid phase microextraction-gas chromatog.-quadrupole time of flight-mass spectrometry (SPME-GC-QTOF-MS). Volatile profile of the wine significantly changed as a function of time during fermentation, which was due to the gradual reduction of C6 compounds, extraction and hydrolysis of terpenoids precursors, and generation of esters and alcs. Misty samples contained higher amount of terpenoids compared to the O’Neal samples during the whole fermentation process. E-asarone and Me isoeugenol were only detected in O’Neal samples. Myrtenol, E-carveol and borneol were presented mainly as bound form, while other terpenoids mainly as free form in the final wines, indicating the different resistance of the glycoside to acid hydrolysis during fermentation

LWT–Food Science and Technology published new progress about Acid hydrolysis. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Product Details of C10H20O2.

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

Myasoedova, Yu. V. published the artcileHydrazides of Organic Acids in the Transformations of the Peroxide Products of Non-1-ene Ozonolysis, Synthetic Route of 111-11-5, the main research area is acylhydrazone preparation chemoselectivity; peroxide product acid hydrazide aprotic solvent chemoselective reduction; nonene ozone ozonolysis.

The reaction of hydrazides of alicyclic capric and aromatic benzoic and p-hydroxybenzoic acids with the peroxide product of non-1-ene ozonolysis was studied. Capric acid hydrazide exhibited the strongest reducing properties in aprotic solvents (methylene chloride, THF) and led to chemoselective and high-yield (�80%) formation of corresponding acylhydrazone. P-Hydroxybenzoic acid hydrazide formed a similar derivative with a yield of 67% only in THF.

Russian Journal of Organic Chemistry published new progress about Chemoselectivity. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Synthetic Route of 111-11-5.

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

Pinto, Joana published the artcileCharacterization of chemical compounds susceptible to be extracted from cork by the wine using GC-MS and 1H NMR metabolomic approaches, Application In Synthesis of 123-29-5, the main research area is wine maturation cork extractable compound geog origin; 1-Terpinen-4-ol (PubChem CID: 11230); Camphene (PubChem CID: 6616); Castalagin (PubChem CID: 168165); Cork; Friedelin (PubChem CID: 91472); GC-MS; Geographical origin; Metabolomics; NMR spectroscopy; Polyphenols; Pyrogallol (PubChem CID: 1057); Quinic acid (PubChem CID: 6508); Sitost-4-en-3-one (PubChem CID: 5484202); Vescalagin (PubChem CID: 5458626); Volatile compounds; o-Cymene (PubChem CID: 10703); trans-3-Pinanone (PubChem CID: 11038); trans-Squalene (PubChem CID: 638072).

This work presents a metabolomic study of cork by GC-MS and 1H-NMR spectroscopy to characterize compounds susceptible to be extracted from cork by the wine in an attempt to find a relationship between the content of these compounds and the geog. origin of cork. Cork from eleven geog. regions was studied, five from Portugal and six from Spain. Unsupervised pattern recognition techniques unveiled three main clusters of regions according to their chem. similarity but not related with geog. proximity. Nineteen compounds were found to be responsible for the clusters, including terpenes (trans-squalene, friedelin, camphene, trans-3-pinanone, 1-terpinen-4-ol, two sesquiterpenes), polyphenols (vescalagin, castalagin), among others (pyrogallol, glucosan, sitost-4-en-3-one, o-cymene, quinic acid, five unknowns). These preliminary results unveiled the potential for a more efficient selection of cork planks for stoppers production based on the compounds susceptible to be extracted from cork by the wine.

Food Chemistry published new progress about Cluster analysis. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Application In Synthesis of 123-29-5.

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

Roppongi, Takao published the artcileSolubility and mass transfer coefficient of oxygen through gas- and water-lipid interfaces, Recommanded Product: Methyl octanoate, the main research area is gas water lipid interface oxygen solubility mass transfer; Henry’s constant; fatty acid; mass transfer coefficient; oxidation; vegetable oil.

The solubility of oxygen and its transfer rate to the lipid phase play important roles in lipid oxidation, which affects the taste and safety of lipid-containing foods. In this study, we measured the Henry’s constants (solubility) of oxygen for fatty acids, fatty acid esters, and triacylglycerols (TAGs; vegetable oils), as well as the mass transfer coefficients of oxygen at the gas- and water-lipid interfaces. The constants and coefficients were estimated by analyzing the change over time in the oxygen partial pressure or concentration in the closed container based on the mass balance equations of oxygen in the gas and liquid phases. The constant for water obtained by the method used in this study was in agreement with the previously reported value to confirm the validity of the method. The constants for lipids depended on the lipid type, and were higher in the order of fatty acid ester, fatty acid, and TAG. That is, the solubility of oxygen decreased in this order. For all lipids, the constant increased as the number of carbon atoms in the fatty acid chain increased. The constants for fatty acids and their esters were linearly correlated with the enthalpies of evaporation of the lipids. The mass transfer coefficients of oxygen at the gas-liquid interface were on the order of 10-5 m/s for water and Me dodecanoate and of 10-6 m/s for TAG (rapeseed oil). The coefficient at the water-lipid interface was on the order of 10-6 m/s. The Henry’s constants (solubility) and transfer rate of oxygen to the lipid phase, fatty acids, fatty acid esters, and triacylglycerols (TAG) were measured. The lipids solubilized three to five times more oxygen than water, and mass transfer rate of oxygen at gas- and water-lipid interfaces were almost same. The constants for fatty acids and fatty acid esters were linearly correlated to their enthalpies of evaporation, and this correlation is expected to be useful for estimating the Henry’s constants for other fatty acids and their esters.

Journal of Food Science published new progress about Cottonseed (oil). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Recommanded Product: Methyl octanoate.

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

Roppongi, Takao published the artcileSolubility and mass transfer coefficient of oxygen through gas- and water-lipid interfaces, Formula: C10H20O2, the main research area is gas water lipid interface oxygen solubility mass transfer; Henry’s constant; fatty acid; mass transfer coefficient; oxidation; vegetable oil.

The solubility of oxygen and its transfer rate to the lipid phase play important roles in lipid oxidation, which affects the taste and safety of lipid-containing foods. In this study, we measured the Henry’s constants (solubility) of oxygen for fatty acids, fatty acid esters, and triacylglycerols (TAGs; vegetable oils), as well as the mass transfer coefficients of oxygen at the gas- and water-lipid interfaces. The constants and coefficients were estimated by analyzing the change over time in the oxygen partial pressure or concentration in the closed container based on the mass balance equations of oxygen in the gas and liquid phases. The constant for water obtained by the method used in this study was in agreement with the previously reported value to confirm the validity of the method. The constants for lipids depended on the lipid type, and were higher in the order of fatty acid ester, fatty acid, and TAG. That is, the solubility of oxygen decreased in this order. For all lipids, the constant increased as the number of carbon atoms in the fatty acid chain increased. The constants for fatty acids and their esters were linearly correlated with the enthalpies of evaporation of the lipids. The mass transfer coefficients of oxygen at the gas-liquid interface were on the order of 10-5 m/s for water and Me dodecanoate and of 10-6 m/s for TAG (rapeseed oil). The coefficient at the water-lipid interface was on the order of 10-6 m/s. The Henry’s constants (solubility) and transfer rate of oxygen to the lipid phase, fatty acids, fatty acid esters, and triacylglycerols (TAG) were measured. The lipids solubilized three to five times more oxygen than water, and mass transfer rate of oxygen at gas- and water-lipid interfaces were almost same. The constants for fatty acids and fatty acid esters were linearly correlated to their enthalpies of evaporation, and this correlation is expected to be useful for estimating the Henry’s constants for other fatty acids and their esters.

Journal of Food Science published new progress about Cottonseed (oil). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Formula: C10H20O2.

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

Satake, Akiharu published the artcileNovel η3-Allylpalladium-Pyridinylpyrazole Complex: Synthesis, Reactivity, and Catalytic Activity for Cyclopropanation of Ketene Silyl Acetal with Allylic Acetates, Safety of Ethyl 2,2-dimethylpent-4-enoate, the main research area is allyl palladium pyridinyl pyrazole preparation catalyst; cyclopropanation ketene silyl acetal allylic acetate; catalysis cyclopropanation ketene silyl acetal allylic.

Novel cationic η3-allylpalladium-pyridinylpyrazole complexes I (R = Me, But) were synthesized from 3-alkyl-5-(2-pyridinyl)pyrazole and η3-allylpalladium chloride dimer in the presence of AgBF4. Cationic complexes I were converted into neutral complexes II under basic conditions. These complexes were characterized by 1H, 13C, and 15N NMR studies. Neutral complexes II have high catalytic activity for cyclopropanation of ketene silyl acetals with allylic acetates. Comparison of the cationic and neutral complexes and the reaction mechanism of cyclopropanation were discussed.

Journal of the American Chemical Society published new progress about Cyclopropanation. 86549-27-1 belongs to class esters-buliding-blocks, name is Ethyl 2,2-dimethylpent-4-enoate, and the molecular formula is C9H16O2, Safety of Ethyl 2,2-dimethylpent-4-enoate.

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

Li, Jian-Feng published the artcileStructural characterization and aquatic toxicity prediction of esters, SDS of cas: 111-11-5, the main research area is aquatic toxicity ester compound structure relationship.

Based on the three-dimensional structures of the compounds, the structures of 48 ester compounds were expressed parametrically. Through multiple linear regression and partial least-squares regression, the relationship models between ester compound structures and aquatic toxicity log(1/IGC50) were established. The correlation coefficients (R2) of the models were 0.9974 and 0.9940, and the standard deviations (SD) were 0.0469 and 0.0646, resp. The stability of the models was evaluated by the leave-one-out internal cross-test. The correlation coefficients (RCV2) of the models of interactive tests were 0.9939 and 0.8952, and the standard deviation (SDCV) was 0.0715 and 0.0925, resp. The external samples were used to test the predictive ability of the models, and the correlation coefficients (Rtest2) of the external predictions were 0.9955 and 0.9955, and the standard deviations (SDtest) were 0.0720 and 0.0716, resp. The mol. structure descriptors could successfully represent the structural characteristics of the compounds, and the built models had good fitting effects, strong stability and high prediction accuracy. The present study has a good reference value for the study of the structure-toxicity relationship of toxic compounds in the environment.

Chinese Journal of Structural Chemistry published new progress about Aquatic toxicity. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, SDS of cas: 111-11-5.

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

Mousavi, Nayereh Sadat published the artcilePredicting the surface tension of mixtures of fatty acid ethyl esters and biodiesel fuels using UNIFAC activity coefficients, HPLC of Formula: 110-42-9, the main research area is surface tension mixture FAME biodiesel fuel UNIFAC.

This work presents the use of a formal thermodn. model together with UNIFAC activity coefficients model, without any further adjustable parameter, to predict the surface tension of biodiesel fuels based on the equality of chem. potentials between the vapor-liquid interface and liquid bulk. The biodiesel samples included in this work were reported previously in the open literature. They were produced from vegetable oils such as: canola, coconut, corn, cottonseed, hazelnut, lard, palm, peanut, rapeseed, safflower, soybean, sunflower, and Walnut. Surface tension values for 18 samples of binary, ternary and quaternary mixtures of fatty acid Et esters (FAEEs) at T = 298.15 were predicted with an average absolute relative deviation (AARD) = 1.39%. Surface tension values for 31 biodiesel samples composed by fatty acid Me esters (FAMEs) were also predicted at temperatures from 303.15 K to 353.15 K. The AARD value obtained for the 78 exptl. points of biodiesel samples was 1.86% which shows a very good agreement with exptl. measurements. In the UNIFAC method, predictions of surface tension values for the mixtures are based on the knowledge of the values of the surface tension for the pure components; these values were obtained from different sources. Also, two simple mixing rules on mass and mole fraction basis were used to predict the surface tension of biodiesel fuels. The AARD value obtained from the comparison between exptl. and calculated values were: 2.77% and 2.91% for mixing rules on mass and mole fractions, resp.

Fluid Phase Equilibria published new progress about Arachis hypogaea. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, HPLC of Formula: 110-42-9.

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

Mousavi, Nayereh Sadat published the artcilePredicting the surface tension of mixtures of fatty acid ethyl esters and biodiesel fuels using UNIFAC activity coefficients, Product Details of C9H18O2, the main research area is surface tension mixture FAME biodiesel fuel UNIFAC.

This work presents the use of a formal thermodn. model together with UNIFAC activity coefficients model, without any further adjustable parameter, to predict the surface tension of biodiesel fuels based on the equality of chem. potentials between the vapor-liquid interface and liquid bulk. The biodiesel samples included in this work were reported previously in the open literature. They were produced from vegetable oils such as: canola, coconut, corn, cottonseed, hazelnut, lard, palm, peanut, rapeseed, safflower, soybean, sunflower, and Walnut. Surface tension values for 18 samples of binary, ternary and quaternary mixtures of fatty acid Et esters (FAEEs) at T = 298.15 were predicted with an average absolute relative deviation (AARD) = 1.39%. Surface tension values for 31 biodiesel samples composed by fatty acid Me esters (FAMEs) were also predicted at temperatures from 303.15 K to 353.15 K. The AARD value obtained for the 78 exptl. points of biodiesel samples was 1.86% which shows a very good agreement with exptl. measurements. In the UNIFAC method, predictions of surface tension values for the mixtures are based on the knowledge of the values of the surface tension for the pure components; these values were obtained from different sources. Also, two simple mixing rules on mass and mole fraction basis were used to predict the surface tension of biodiesel fuels. The AARD value obtained from the comparison between exptl. and calculated values were: 2.77% and 2.91% for mixing rules on mass and mole fractions, resp.

Fluid Phase Equilibria published new progress about Arachis hypogaea. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Product Details of C9H18O2.

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

Rajak, Upendra published the artcileAssessment of diesel engine performance using spirulina microalgae biodiesel, Related Products of esters-buliding-blocks, the main research area is spirulina microalgae biodiesel fuel property.

The present work encompasses combustion, performance, and emission parameters of exptl. investigations of a single cylinder, four stroke, water cooled, direct injection (DI), naturally aspirated compression ignition (CI) engine with a rated power output of 3.7 kW at constant engine speed (1500 rpm) using diesel and different blends of microalgae spirulina. The microalgae spirulina blend of ratio with diesel (BYY) where YY indicates blending percentage (0%, 20%, 40%, 60%, 80%, and 100% volume basis with diesel resp.) with different engine loading condition (25%, 50%, 75% and 100%) were compared with diesel at CR17.5:1. The output illustrates that the most optimum value is B20% when compared with diesel. The result depicts firstly that there is a reduction in brake thermal efficiency by 0.98%, exhaust gas temperature by 1.7%, hydrocarbon (HC) by 16.3%, carbon monoxide (CO) by 3.6%, NOX emission by of 6.8%, and smoke emission by 12.35% resp. Secondly, there is an increase in specific fuel consumption by up to 5.2% and CO2 emission by 2.8% for spirulina blend ratio (B20%) as compared to diesel (B0%) at full load condition engine with constant engine speed.

Energy (Oxford, United Kingdom) published new progress about Ashes (residues). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Related Products of esters-buliding-blocks.

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