Esters-buliding-blocks

Peralta-Ruiz, Yeimmy published the artcilePackham′s triumph pears (Pyrus communis L.) post-harvest treatment during cold storage based on chitosan and rue essential oil, Safety of Benzyl acetate, the main research area is Pyrus communis chitosan Rue essential oil antifungal; Ruta graveolens essential oil; antifungal; chitosan.

Pears (Pyrus communis L.) cv. Packham′s Triumph are very traditional for human consumption, but pear is a highly perishable climacteric fruit with a short shelf-life affected by several diseases with a microbial origin. In this study, a protective effect on the quality properties of pears was evidenced after the surface application of chitosan-Ruta graveolens essential oil coatings (CS + RGEO) in four different concentrations (0, 0.5, 1.0 and 1.5 %, volume/volume) during 21 days of storage under 18 °C. After 21 days of treatment, a weight loss reduction of 10% (from 40.2 ± 5.3 to 20.3 ± 3.9) compared to the uncoated pears was evident with CS + RGEO 0.5%. All the fruits′ phys.-chem. properties evidenced a protective effect of the coatings. The maturity index increased for all the treatments. However, the pears with CS + RGEO 1.5% were lower (70.21) than the uncoated fruits (98.96). The loss of firmness for the uncoated samples was higher compared to the coated samples. The pears′ most excellent mech. resistance was obtained with CS + RGEO 0.5% after 21 days of storage, both for compression resistance (7.42 kPa) and force (22.7 N). Microbiol. studies demonstrated the protective power of the coatings. Aerobic mesophilic bacteria and molds were significantly reduced (in 3 Log CFU/g compared to control) using 15 μL/mL of RGEO, without affecting consumer perception. The results presented in this study showed that CS + RGEO coatings are promising in the post-harvest treatment of pears.

Molecules published new progress about Acidity. 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

Pavlovic, J. published the artcileCatalytic activity of SnO2- and SO4/SnO2-containing clinoptilolite in the esterification of levulinic acid, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is catalytic SnO2 SO4 clinoptilolite esterification levulinate Zeolitic tuff.

Catalysts based on natural zeolite – clinoptilolite loaded with either SnO2 (TOHCLI) or sulfated SnO2 (STOHCLI) were prepared and tested in the esterification of levulinic acid (LA) with octanol or ethanol. The Sn content in TOHCLI and STOHCLI varied from 4.5 to 12.3 weight%. The catalysts were characterized by powder X-ray diffraction method, SEM coupled with energy dispersive X-ray spectroscopy, thermal anal., XPS, N2 physisorption at -196 °C, 27Al and 29Si MAS NMR solid state spectroscopy and FTIR spectroscopy for anal. of acidic centers. A high conversion rate of LA into octyl- (OLA) or Et levulinate (ELA) was obtained for both TOHCLI and STOHCLI. TOHCLI showed a high activity in the conversion of LA into OLA (55%) and a moderate activity in the conversion to ELA (22%). STOHCLI led to a total conversion of LA to OLA and ELA due to the presence of a high amount of Bronsted and Lewis acid sites in the catalysts. The catalytic activity decreased to 86% for OLA and to 66% for ELA after next five cycles. Lower catalytic activity in the repeated cycles during ELA formation was explained by pore blockage due to coke formation.

Microporous and Mesoporous Materials published new progress about Acidity. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Recommanded Product: Ethyl 4-oxopentanoate.

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

Guo, Haixin published the artcileSynthesis of ethyl levulinate over amino-sulfonated functional carbon materials, Formula: C7H12O3, the main research area is ethyl levulinate preparation amino sulfonated functional carbon catalyst.

Functional carbon materials (FCM) containing amino and sulfonate groups (NS-FCM) were prepared with one-pot hydrothermal carbonization of cellulose using ammonium formate and 5-sulfosalicylic acid additives. The catalytic materials were applied to levulinic acid or furfuryl alc. substrates in ethanol solvent for synthesizing Et levulinate (EL). Catalytic activity of NS-FCM was found to be related to its sulfonate groups, while substrate selectivity of NS-FCM was found to be related to its amino groups as supported by equilibrium adsorption and reaction experiments Pre-adsorbed LA substrate onto NS-FCM followed by ethanol treatment at reaction conditions achieved EL yields higher than 90% that is attributed to a selective adsorption and cooperative desorption mechanism. The activity of NS-FCM catalyst was stable for five reuse cycles, but lost about 10% of its activity from the third cycle that is attributed to adsorption of humin precursors onto active sites.

Renewable Energy published new progress about Acidity. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Formula: C7H12O3.

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

Nie, Yifan published the artcileSynthesis of mesoporous sulfonated carbon from chicken bones to boost rapid conversion of 5-hydroxymethylfurfural and carbohydrates to 5-ethoxymethylfurfural, Quality Control of 539-88-8, the main research area is mesoporous sulfonated carbon chicken bone boost hydroxymethylfurfural carbohydrate ethoxymethylfurfural.

Sulfonated carbon material is an important class of catalysts, but controllable preparation of high-performance materials for biomass transformations is still challenging. Here, we demonstrate an effective strategy to prepare mesoporous sulfonated carbon materials from chicken bones to convert carbohydrates to 5-ethoxymethylfurfural (EMF). The carbonization of chicken bones without using addnl. templates gave hierarchical porous carbon materials. The subsequent sulfonation by chem. reduction approach introduced 2.33 mmol/g of -PhSO3H group, reserved abundant mesopores but blocked micropores. The sulfonated carbon materials afforded EMF yields of 94.7% and 68.6% from 5-hydroxymethylfurfural (HMF) and fructose in ethanol within 1.5 h and 2 h, resp., without using high b.p. co-solvents. Furthermore, the apparent activation energies for HMF and fructose conversion were 29.1 and 49.5 kJ/mol, resp. The catalyst could be reused four times with EMF yield decreasing from 68.6% to 62.7%.

Renewable Energy published new progress about Acidity. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Quality Control of 539-88-8.

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

He, Jiang published the artcileZeolite-Tailored Active Site Proximity for the Efficient Production of Pentanoic Biofuels, HPLC of Formula: 539-88-8, the main research area is zeolite bifunctional catalyst proximity effect pentanoic acid biofuel; bifunctional catalysis; biomass conversion; hydrodeoxygenation; proximity; zeolites.

Biofuel production can alleviate reliance on fossil resources and thus carbon dioxide emission. Hydrodeoxygenation (HDO) refers collectively to a series of important biorefinery processes to produce biofuels. Here, well-dispersed and ultra-small Ru metal nanoclusters (ca. 1 nm), confined within the micropores of zeolite Y, provide the required active site intimacy, which significantly boosts the chemoselectivity towards the production of pentanoic biofuels in the direct, one-pot HDO of neat Et levulinate. Crucial for improving catalyst stability is the addition of La, which upholds the confined proximity by preventing zeolite lattice deconstruction during catalysis. We have established and extended an understanding of the “”intimacy criterion”” in catalytic biomass valorization. These findings bring new understanding of HDO reactions over confined proximity sites, leading to potential application for pentanoic biofuels in biomass conversion.

Angewandte Chemie, International Edition published new progress about Acidity. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, HPLC of Formula: 539-88-8.

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

Song, Daiyu published the artcileDesign of periodic mesoporous sulfonic acid and titanium bi-functionalized alkyl-bridged organosilica hybrid catalysts for efficient synthesis of ethyl levulinate, Related Products of esters-buliding-blocks, the main research area is propylsulfonic arenesulfonic acid titanium silica hybrid catalyst ethyl levulinate.

A series of periodic mesoporous propylsulfonic/arenesulfonic acid and titanium bi-functionalized ethyl/phenyl-bridged organosilica hybrid catalysts, Pr/ArSO3H-Si(Et/Ph)Si-Ti, with controllable Ti loadings are prepared by a nonionic surfactant-templated sol-gel co-condensation route under acidic media and carefully adjusted silicon-to-titanium molar ratios in the initial preparation systems. As-prepared hybrid catalysts with both Bronsted and Lewis acid natures, excellent porosity properties and surface hydrophobicity exhibit excellent catalytic activity in the synthesis of Et levulinate, a promising fuel blend, from the esterification of levulinic acid with ethanol, and the esterification activity is closely related to Ti loading or SO3H group-to-Ti molar ratio as well as the structures of the incorporated sulfonic acid groups and bridging organic units. Addnl., the catalysts can be reused for three times without any activity loss, attributing to covalent bonding the organosulfonic acid groups and Ti(IV) species with the silica/carbon framework.

Microporous and Mesoporous Materials published new progress about Acidity. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Related Products of esters-buliding-blocks.

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

i Cortiella, Mariona Gil published the artcileChemical and physical implications of the use of alternative vessels to oak barrels during the production of white wines, HPLC of Formula: 111-11-5, the main research area is oak barrel white wine alternative vessel chem phys implication; Sauvignon Blanc; aging on lees; clay jars; concrete vessels; oval-shaped tanks; polyethylene vessels; stainless-steel tanks; white wine.

Recently, the use of alternative vessels to oak barrels during winemaking has become increasingly popular, but little is known about their impact on the chem. composition of the resulting wines. To address this issue, a Sauvignon Blanc wine was elaborated from the same grape juice by using cylindrical stainless-steel tanks, oval-shaped concrete vessels, oval-shaped polyethylene vessels, and clay jars in triplicate. Each vessel was used for alc. fermentation and the aging of wines over its own lees. Wines elaborated in concrete vessels showed the highest pH and the lowest titratable acidity, most likely related to the observed release of inorganic compounds from the concrete walls. Little effect of the vessels was seen on the wine color and phenolic composition Wines elaborated in clay jars showed the highest turbidity and the highest content of soluble polysaccharides, while those made using cylindrical stainless-steel tanks showed the highest content of volatile compounds Despite the observed differences, all of the vessels tested seem suitable for white wine production since every wine showed chem. features that corresponded with the quality standards of Sauvignon Blanc wines.

Molecules published new progress about Acidity. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, HPLC of Formula: 111-11-5.

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

i Cortiella, Mariona Gil published the artcileChemical and physical implications of the use of alternative vessels to oak barrels during the production of white wines, Quality Control of 110-42-9, the main research area is oak barrel white wine alternative vessel chem phys implication; Sauvignon Blanc; aging on lees; clay jars; concrete vessels; oval-shaped tanks; polyethylene vessels; stainless-steel tanks; white wine.

Recently, the use of alternative vessels to oak barrels during winemaking has become increasingly popular, but little is known about their impact on the chem. composition of the resulting wines. To address this issue, a Sauvignon Blanc wine was elaborated from the same grape juice by using cylindrical stainless-steel tanks, oval-shaped concrete vessels, oval-shaped polyethylene vessels, and clay jars in triplicate. Each vessel was used for alc. fermentation and the aging of wines over its own lees. Wines elaborated in concrete vessels showed the highest pH and the lowest titratable acidity, most likely related to the observed release of inorganic compounds from the concrete walls. Little effect of the vessels was seen on the wine color and phenolic composition Wines elaborated in clay jars showed the highest turbidity and the highest content of soluble polysaccharides, while those made using cylindrical stainless-steel tanks showed the highest content of volatile compounds Despite the observed differences, all of the vessels tested seem suitable for white wine production since every wine showed chem. features that corresponded with the quality standards of Sauvignon Blanc wines.

Molecules published new progress about Acidity. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Quality Control of 110-42-9.

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

i Cortiella, Mariona Gil published the artcileChemical and physical implications of the use of alternative vessels to oak barrels during the production of white wines, Quality Control of 106-32-1, the main research area is oak barrel white wine alternative vessel chem phys implication; Sauvignon Blanc; aging on lees; clay jars; concrete vessels; oval-shaped tanks; polyethylene vessels; stainless-steel tanks; white wine.

Recently, the use of alternative vessels to oak barrels during winemaking has become increasingly popular, but little is known about their impact on the chem. composition of the resulting wines. To address this issue, a Sauvignon Blanc wine was elaborated from the same grape juice by using cylindrical stainless-steel tanks, oval-shaped concrete vessels, oval-shaped polyethylene vessels, and clay jars in triplicate. Each vessel was used for alc. fermentation and the aging of wines over its own lees. Wines elaborated in concrete vessels showed the highest pH and the lowest titratable acidity, most likely related to the observed release of inorganic compounds from the concrete walls. Little effect of the vessels was seen on the wine color and phenolic composition Wines elaborated in clay jars showed the highest turbidity and the highest content of soluble polysaccharides, while those made using cylindrical stainless-steel tanks showed the highest content of volatile compounds Despite the observed differences, all of the vessels tested seem suitable for white wine production since every wine showed chem. features that corresponded with the quality standards of Sauvignon Blanc wines.

Molecules published new progress about Acidity. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Quality Control of 106-32-1.

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

i Cortiella, Mariona Gil published the artcileChemical and physical implications of the use of alternative vessels to oak barrels during the production of white wines, Related Products of esters-buliding-blocks, the main research area is oak barrel white wine alternative vessel chem phys implication; Sauvignon Blanc; aging on lees; clay jars; concrete vessels; oval-shaped tanks; polyethylene vessels; stainless-steel tanks; white wine.

Recently, the use of alternative vessels to oak barrels during winemaking has become increasingly popular, but little is known about their impact on the chem. composition of the resulting wines. To address this issue, a Sauvignon Blanc wine was elaborated from the same grape juice by using cylindrical stainless-steel tanks, oval-shaped concrete vessels, oval-shaped polyethylene vessels, and clay jars in triplicate. Each vessel was used for alc. fermentation and the aging of wines over its own lees. Wines elaborated in concrete vessels showed the highest pH and the lowest titratable acidity, most likely related to the observed release of inorganic compounds from the concrete walls. Little effect of the vessels was seen on the wine color and phenolic composition Wines elaborated in clay jars showed the highest turbidity and the highest content of soluble polysaccharides, while those made using cylindrical stainless-steel tanks showed the highest content of volatile compounds Despite the observed differences, all of the vessels tested seem suitable for white wine production since every wine showed chem. features that corresponded with the quality standards of Sauvignon Blanc wines.

Molecules published new progress about Acidity. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

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