Tag: M.W=150-200

Cameleyre, Margaux published the artcileImpact of Whisky Lactone Diastereoisomers on Red Wine Fruity Aromatic Expression in Model Solution, HPLC of Formula: 106-32-1, the main research area is whisky lactone diastereoisomer red wine fruity aroma model; fruity aromatic expression; oak wood; perceptive interactions; red wine; whisky lactone.

The impact of whisky lactone diastereoisomers on the typical fruity expression of red Bordeaux wines was evaluated by sensory anal. The detection thresholds of cis- and trans-whisky lactone in a dilute alc. solution (12% volume/volume) were 20 and 130μg/L, resp. Consequently, considering their average concentrations found in oak-aged red wines, cis-whisky lactone was present at supra threshold levels, whereas trans-whisky lactone was below its detection threshold. Adding these diastereoisomers to a red wine fruity aromatic reconstitution at these average concentrations led to a decrease in the perception of this last one, highlighting a masking effect. Sensory profiles of cis- and trans-whisky lactone confirmed that these compounds modified the perception of fruity aromas, decreasing the intensity of red berry fruit notes and increasing that of blackberry fruit and spicy descriptors.

Journal of Agricultural and Food Chemistry published new progress about Diastereomers. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, HPLC of Formula: 106-32-1.

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

Santos, Glauber Batista Moreira published the artcileEffects of processing on the chemical, physicochemical, enzymatic, and volatile metabolic composition of pitaya (Hylocereus polyrhizus (F.A.C. Weber) Britton & Rose), Recommanded Product: Methyl octanoate, the main research area is Hylocereus chem physicochem enzymic processing volatile metabolite; CG-MS; Chemometric analysis; Peroxidase; Polyphenol oxidase; Volatile metabolites.

The effects of processing on the chem., physicochem., enzymic, and volatile metabolic composition of pitaya pulp were assessed for the first time. To this end, the following treatments to obtain pitaya pulp were evaluated: Treatment A (TA, pulp processing without ascorbic acid), Treatment B (TB, whole fruit processing with ascorbic acid), and Control (whole fruit processing without ascorbic acid). The treatment employed in TB resulted in low polyphenol oxidase and peroxidase activity, and no significant chem. or physicochem. alterations in most parameters evaluated. In addition, TB presents high yields and fiber content compared to the TA or Control. For metabolic anal., Gas Chromatog.-Mass Spectrometry (GC-MS) was effective for the simultaneous determination of 80 volatile metabolites in pitaya. Chemometric analyses was used to efficiently distinguish the volatile compounds of each treatment, and demonstrated that TB presents an interesting volatile profile due the conservation or agregation of compounds

Food Research International published new progress about Dietary fiber. 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

Ruiperez, Violeta published the artcileContinuous malolactic fermentation of red wine in a reactor using silica-alginate encapsulated Oenococcus oeni, Category: esters-buliding-blocks, the main research area is Oenococcus oeni encapsulation red wine malolactic fermentation reactor.

Malolactic fermentation (MLF) is a challenging and time-consuming step in the winemaking process. The effects of climate change are making the intrinsic conditions in red wine more challenging for the growth of lactic acid bacteria through interfering with a prompt and effective MLF. However, this is a necessary process in red wine production that contributes to high quality of wine demanded by consumers. Previous studies in our group reported a highly efficient MLF of red wine by using encapsulated Oenococcus oeni. Here, we designed a bench-scale packed-bed reactor using encapsulated bacteria to facilitate and speed up this process. The time to complete MLF was reduced as the concentration of biocapsules increased. The system exhibited operational stability and efficiency in sequential batches of wine recirculated through the column. Furthermore, an efficient continuous MLF was achieved using the packed-bed reactor. In general, a slight reduction in the concentration of some volatile organic compounds (VOCs) in the wines from the continuous system was observed as compared to those from the recirculated system.

Food and Bioproducts Processing published new progress about Encapsulation. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Category: esters-buliding-blocks.

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

Zhan, Taotao published the artcileSpeed of Sound and Derived Properties of Ethyl Nonanoate, Formula: C11H22O2, the main research area is ethyl nonanoate sound velocity derived property.

Et nonanoate is a promising component of biodiesel with a satisfactory cetane number and reactivity. The speeds of sound in Et nonanoate were measured by the Brillouin light scattering (BLS) method within the temperatures from 295.24 to 593.15 K and at pressures up to 10 MPa. The relative expanded uncertainty (k = 2) of our BLS exptl. system is estimated to be less than 0.7%. The densities of Et nonanoate were measured using a vibrating tube densimeter at atm. pressure in the temperature range of 293.15-353.15 K, and the absolute average relative deviation between the exptl. densities and the literature data is 0.12%. For temperatures between 303.15 and 353.15 K and at pressures up to 10 MPa, these measurements were used to calculate densities, isobaric heat capacities, and indirect derivative properties including the isobaric thermal expansion, the isothermal compressibility, the isentropic compressibility, and the internal pressure. The comparison between the calculated isobaric heat capacities and the literature values shows a satisfactory agreement with an absolute average relative deviation of 0.18% and a maximum deviation of 0.38%. At the end, the dependences of internal pressure of Et nonanoate on temperature and pressure were found to be in accordance with those of Et caprylate and Et caprate.

Journal of Chemical & Engineering Data published new progress about Boiling point. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

Dupeux, Tristan published the artcileCOSMO-RS as an effective tool for predicting the physicochemical properties of fragrance raw materials, Safety of Benzyl acetate, the main research area is fragrance raw material physicochem property.

A predictive tool called COSMO-RS, Conductor-Like Screening Model for Real Solvents, based on quantum chem., dielec. continuum models, electrostatics surface interactions, and statistical thermodn., has been used to predict five key physicochem. properties of raw materials used in perfumery industries. The prediction of b.p. (BP), octanol-water partition coefficient (log P), vapor pressure (VP), water solubility (WS), and Henry′s law constant (HLC) of fragrance mols. has been validated with a reference data set of 166 organic compounds Knowing these properties for a fragrance mol. is essential and being able to predict them precisely can be particularly useful in the development of new mols. or in the replacement of controversial mols. regarding safety issues without compromising the overall hedonic accord. Finally, mapping the vapor pressure vs. the Henry′s law constant and the octanol-water partition coefficient consistently predicts the note class of the mols. useful for release comparison of captives.

Flavour and Fragrance Journal published new progress about Boiling point. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Safety of Benzyl acetate.

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

Cardona, Luis F. published the artcileExtension of a group contribution method to predict viscosity based on momentum transport theory using a modified Peng-Robinson EoS, SDS of cas: 110-42-9, the main research area is group contribution method viscosity momentum transport theory PengRobinson EoS.

In this work, a semitheoretical model based on the momentum transport theory is generalized through the development of a group contribution method. Viscosity data for temperatures between 13.95 and 950 K and pressures from 1.00 x 10-3 bar up to 1.00 x 104 bar were used to develop and to validate the model. To perform viscosity calculations, the model requires d. and residual enthalpy that were obtained from a modified Peng-Robinson equation of state. Also, the model has one adjustable parameter that can be estimated form the group contribution method. Viscosity was calculated for 256 substances including 95 non-polar and 161 polar compounds In total, 23 organic families were considered. Average deviations below 6.67% were calculated The performance of the model was compared with those of other models reported in the literature. Calculations were carried out to include the saturation and single-phase regions. In general, it can be considered that the proposed model describes viscosity adequately using only one adjustable parameter.

Industrial & Engineering Chemistry Research published new progress about Boiling point. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, SDS of cas: 110-42-9.

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

Cheng, Ming published the artcilePalladium-Catalyzed Carbene Migratory Insertion/Carbonylation Cascade Reaction: Synthesis of 2-Indolones with a C3 All-Carbon Quaternary Center, Application In Synthesis of 583-04-0, the main research area is indolone preparation; amino aryl diazo ester allyl carboxylate carbon monoxide; tandem carbene migratory insertion carbonylation.

An attractive palladium-catalyzed three-component reaction of ortho-amino aryl diazo esters, allyl carboxylates, and carbon monoxide (CO) has been developed. This catalytic system rendered domino carbene migratory insertion and carbonylation. Remarkably, 2-indolones with a C3 all-carbon quaternary center can be selectively obtained in good to excellent yields via one-pot synthesis, in which two different C-C bonds and one C-N bond were formed in a straightforward manner.

Organic Letters published new progress about Carbonylation. 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Application In Synthesis of 583-04-0.

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

Facanha, Rafaela Vieira published the artcileCombined application of ethylene and 1-methylcyclopropene on ripening and volatile compound production of ‘Golden’ papaya, Safety of Methyl octanoate, the main research area is papaya ethylene methylcyclopropene ripening volatile compound.

Papaya (Carica papaya L.) fruit are consumed worldwide, but they are highly perishable. The effects of the application of 1-methylcyclopropene (1-MCP) with and without ethylene on ‘Golden’ papaya ripening and production of volatile compounds responsible for aroma. Fruit were treated with 2.5 μl L-1 ethylene and/or 100 nL L-1 of 1-MCP for 12 h as follows: I) control, II) ethylene, III) 1-MCP, IV) ethylene + 1-MCP (simultaneous), V) ethylene followed by application of 1-MCP at a 12 h interval and VI) ethylene + 1-MCP without any interval. Pulp firmness, skin color, skin chlorophyll content, skin and pulp carotenoids, ethylene production, respiratory activity, internal ethylene concentration (IEC), pectin Me esterase (PME) activity, 1-carboxylic acid-1-aminocyclopropane oxidase (ACC oxidase) activity and volatile compounds were measured. Fruit were stored at 22 °C, with anal. of volatile compounds performed until day 8 and all others until day 6. Fruit treated with only 1-MCP developed rubberized pulp. Fruit treated simultaneously with ethylene and 1-MCP reached desirable firmness for consumption by day 6. Co-application of 1-MCP + ethylene promoted chlorophyll degradation A consistent increase in ethylene production in 1-MCP-treated fruit above those observed in control fruit and in fruit treated with ethylene only was observed In relation to volatile compounds, linalool and its oxides were affected less by 1-MCP treatment, with or without ethylene, on days 2 and 6, and did not affect fruit flavor.

Postharvest Biology and Technology published new progress about Carica papaya. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Safety of Methyl octanoate.

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

Jiang, Bian published the artcileComparative proteomic analysis provides novel insights into the regulation mechanism underlying papaya (Carica papaya L.) exocarp during fruit ripening process, Formula: C11H22O2, the main research area is Carica exocarp fruit ripening proteomics fatty acid metabolsim; Differential expressed protein; Fatty acid metabolism; Fruit; Hormones; Papaya; Ripening.

Background: Papaya (Carica papaya L.) is a popular climacteric fruit, undergoing various physico-chem. changes during ripening. Although papaya is widely cultivated and consumed, few studies on the changes in metabolism during its ripening process at the proteasome level have been performed. Using a newly developed TMT-LCMS anal., proteomes of papaya fruit at different ripening stages were investigated. Results: In total, 3220 proteins were identified, of which 2818 proteins were quantified. The differential accumulated proteins (DAPs) exhibited various biol. functions and diverse subcellular localizations. The KEGG enrichment anal. showed that various metabolic pathways were significantly altered, particularly in flavonoid and fatty acid metabolisms The up-regulation of several flavonoid biosynthesis-related proteins may provide more raw materials for pigment biosynthesis, accelerating the color variation of papaya fruit. Variations in the fatty acid metabolism- and cell wall degradation-related proteins were investigated during the ripening process. Furthermore, the contents of several important fatty acids were determined, and increased unsaturated fatty acids may be associated with papaya fruit volatile formation. Conclusions: Our data may give an intrinsic explanation of the variations in metabolism during the ripening process of papaya fruit.

BMC Plant Biology published new progress about Carica papaya. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

Peralta-Ruiz, Yeimmy published the artcileColletotrichum gloesporioides inhibition using chitosan-Ruta graveolens L essential oil coatings: Studies in vitro and in situ on Carica papaya fruit, Recommanded Product: Benzyl acetate, the main research area is Colletotrichum Carica Ruta chitosan essential oil coating inhibition; Decay index; Edible coating; Hyphae; Maturation fruit; Molds; Morphological alterations; Postharvest pathogen.

In this study we assessed the efficacy of chitosan (CHI) (2%) emulsion added with Ruta graveolens L. essential oil (REO) at different concentrations (0.5%, 1.0% and 1.5%) to control C. gloesporioides grows both “”in situ”” and “”in vitro”” in papaya Maradol (Carica papaya L.). In vitro studies showed a decrease on fungal growth (mycelia diameter) with the increase of REO concentration, while 0.5% of REO induce a reduction of 56.42%, REO at 1.0% and 1.5% induced a reduction of 97%. Microscopic anal. showed irreversible deleterious morphol. and ultrastructural alterations as well as changes in conidia morphol., and conidia germination inhibition up to 90%. Among the most abundant REO constituents, 2-Nonanol showed strong antifungal activity followed by 2-Undecanone, Benzyl acetate, 2-Nonanone, 2-Tridecanone and 2-Dodecanone. Studies “”in situ”” on papaya fruit during 12 days at 20°C, showed a reduction of the C. gloesporioides lesion expansion by 50% using CHI-REO 0.5% emulsions and by 100% with treatments of CHI-REO 1.0 and 1.5%, in addition the emulsions were efficacious to reduce the fruit surface microbiota. On the other hand, physicochem. anal. of the papaya fruits demonstrated that CHI-REO emulsions treatment delayed papaya ripening without affecting the organoleptic characteristics. All these results demonstrated for the first time the application of coatings CHI-REO as a postharvest treatment for the control of anthracnose on papaya fruit.

International Journal of Food Microbiology published new progress about Carica papaya. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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