Month: December 2022

Lei, Lyu published the artcileBio-modified rubberized asphalt binder: A clean, sustainable approach to recycle rubber into construction, Application of Methyl octanoate, the main research area is recycle rubber biomodified rubberized asphalt binder.

This paper introduces a hybrid utilization of scrap tires and bio-oil made from biomass waste to create bio-modified rubberized asphalt for use in roadway construction. This in turn promotes clean and sustainable manufacturing while enhancing resource conservation and durability of pavements. The durability of pavements is impacted by the resistance of their asphalt binder to moisture damage and aging. This study examines the moisture resistance of bio-modified rubberized asphalt when exposed to thermal aging and UV aging. Study results show that thermal aging significantly weakens the cohesive properties of rubberized asphalt binder, while UV aging reduces its adhesive properties when exposed to water. Bio-modification of rubberized asphalt binder was found to be effective to improve resistance to cohesive damage by three times based on the rheol. test, and resistance to adhesive damage by 70% as measured by the moisture-induced shear-thinning index. The observed improvement is attributed to the bio-oil’s role as a sacrificial agent, delaying the reaction of free radicals and asphalt. Also, computational modeling shows that bio-oil mols. supersede asphalt mols. in adsorption to stones aggregates creating a stable bridge between stone and asphalt. The outcome of this study promotes clean and sustainable manufacturing while turning two waste streams (rubber and biomass waste) into a product (bio-modified rubber) in support of resource conservation and sustainability.

Journal of Cleaner Production published new progress about Absorption. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application of Methyl octanoate.

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

Shatsauskas, Anton L. published the artcileSynthesis and photophysical properties of the products of the reaction of 5-methyl-7-phenyl[1,3]oxazolo[5,4-b]pyridin-2(1H)-one with amino acids, Application In Synthesis of 623-50-7, the main research area is oxo phenyl dihydropyridinyl imidazolidinedione preparation photoluminescence; ethyl oxo phenyl dihydropyridinyl ureidoacetate preparation photoluminescence.

The reaction of amino acid esters RCH(NH2)C(O)OEt·HCl (R = H, Me, 3-ethoxy-3-oxopropyl, Bn, etc.) with compound I led to the derivatives of 3-(2-oxo-4-phenyl-1,2-dihydropyridin-3-yl)imidazolidine-2,4-diones II and Et 2-[3-(2-oxo-4-phenyl-1,2-dihydropyridin-3-yl)ureido]acetates III, as well as several of their structural analogs. The photophys. properties of the synthesized compounds II and III were investigated.

Chemistry of Heterocyclic Compounds (New York, NY, United States) published new progress about Absorption. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, Application In Synthesis of 623-50-7.

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

Morales, M. L. published the artcileVolatile metabolites produced by different flor yeast strains during wine biological ageing, Formula: C9H10O2, the main research area is volatile metabolite yeast strain wine biol aging; Flor yeast; GC-MS analysis; Heatmap; Sherry wine; Volatile compound.

Sherry white wine called Fino is produced by dynamic biol. ageing under the action of flor yeasts using traditional practices aimed at ensuring uniform quality and characteristics over time. These kinds of yeasts provide typical sensory properties to Fino wines. Although there are studies of the volatile composition of these wines submitted to biol. ageing in wood barrels, there is a lack of knowledge on the particular volatile profile produced by different flor yeast strains from Sherry zone wineries. For this reason, the aim of this study was to analyze the volatile profiles produced by 15 pure culture flor velum yeasts, with the goal of observing their suitability for obtaining high quality Fino sherry wines. Volatile composition was determined by dual sequential stir bar sorptive extraction, followed by GC-MS anal. All yeast strains studied produced the increase of most acetals, highlighting acetaldehyde diethylacetal which was the compound that most increased. Among terpenes, nerolidol and farnesol underwent remarkable increases. However, results showed that in a month of biol. ageing, significant differences were observed among the volatile metabolites produced by flor yeast strains studied. Only some of them stood out for their high production of volatile compounds characteristic of Sherry Fino wines, which are good candidates for producing starter cultures.

Food Research International published new progress about Metabolites. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Formula: C9H10O2.

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

Morales, M. L. published the artcileVolatile metabolites produced by different flor yeast strains during wine biological ageing, Name: Ethyl nonanoate, the main research area is volatile metabolite yeast strain wine biol aging; Flor yeast; GC-MS analysis; Heatmap; Sherry wine; Volatile compound.

Sherry white wine called Fino is produced by dynamic biol. ageing under the action of flor yeasts using traditional practices aimed at ensuring uniform quality and characteristics over time. These kinds of yeasts provide typical sensory properties to Fino wines. Although there are studies of the volatile composition of these wines submitted to biol. ageing in wood barrels, there is a lack of knowledge on the particular volatile profile produced by different flor yeast strains from Sherry zone wineries. For this reason, the aim of this study was to analyze the volatile profiles produced by 15 pure culture flor velum yeasts, with the goal of observing their suitability for obtaining high quality Fino sherry wines. Volatile composition was determined by dual sequential stir bar sorptive extraction, followed by GC-MS anal. All yeast strains studied produced the increase of most acetals, highlighting acetaldehyde diethylacetal which was the compound that most increased. Among terpenes, nerolidol and farnesol underwent remarkable increases. However, results showed that in a month of biol. ageing, significant differences were observed among the volatile metabolites produced by flor yeast strains studied. Only some of them stood out for their high production of volatile compounds characteristic of Sherry Fino wines, which are good candidates for producing starter cultures.

Food Research International published new progress about Metabolites. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Name: Ethyl nonanoate.

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

Morales, M. L. published the artcileVolatile metabolites produced by different flor yeast strains during wine biological ageing, Product Details of C9H18O2, the main research area is volatile metabolite yeast strain wine biol aging; Flor yeast; GC-MS analysis; Heatmap; Sherry wine; Volatile compound.

Sherry white wine called Fino is produced by dynamic biol. ageing under the action of flor yeasts using traditional practices aimed at ensuring uniform quality and characteristics over time. These kinds of yeasts provide typical sensory properties to Fino wines. Although there are studies of the volatile composition of these wines submitted to biol. ageing in wood barrels, there is a lack of knowledge on the particular volatile profile produced by different flor yeast strains from Sherry zone wineries. For this reason, the aim of this study was to analyze the volatile profiles produced by 15 pure culture flor velum yeasts, with the goal of observing their suitability for obtaining high quality Fino sherry wines. Volatile composition was determined by dual sequential stir bar sorptive extraction, followed by GC-MS anal. All yeast strains studied produced the increase of most acetals, highlighting acetaldehyde diethylacetal which was the compound that most increased. Among terpenes, nerolidol and farnesol underwent remarkable increases. However, results showed that in a month of biol. ageing, significant differences were observed among the volatile metabolites produced by flor yeast strains studied. Only some of them stood out for their high production of volatile compounds characteristic of Sherry Fino wines, which are good candidates for producing starter cultures.

Food Research International published new progress about Metabolites. 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

Morales, M. L. published the artcileVolatile metabolites produced by different flor yeast strains during wine biological ageing, Formula: C11H22O2, the main research area is volatile metabolite yeast strain wine biol aging; Flor yeast; GC-MS analysis; Heatmap; Sherry wine; Volatile compound.

Sherry white wine called Fino is produced by dynamic biol. ageing under the action of flor yeasts using traditional practices aimed at ensuring uniform quality and characteristics over time. These kinds of yeasts provide typical sensory properties to Fino wines. Although there are studies of the volatile composition of these wines submitted to biol. ageing in wood barrels, there is a lack of knowledge on the particular volatile profile produced by different flor yeast strains from Sherry zone wineries. For this reason, the aim of this study was to analyze the volatile profiles produced by 15 pure culture flor velum yeasts, with the goal of observing their suitability for obtaining high quality Fino sherry wines. Volatile composition was determined by dual sequential stir bar sorptive extraction, followed by GC-MS anal. All yeast strains studied produced the increase of most acetals, highlighting acetaldehyde diethylacetal which was the compound that most increased. Among terpenes, nerolidol and farnesol underwent remarkable increases. However, results showed that in a month of biol. ageing, significant differences were observed among the volatile metabolites produced by flor yeast strains studied. Only some of them stood out for their high production of volatile compounds characteristic of Sherry Fino wines, which are good candidates for producing starter cultures.

Food Research International published new progress about Metabolites. 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

Morales, M. L. published the artcileVolatile metabolites produced by different flor yeast strains during wine biological ageing, SDS of cas: 6259-76-3, the main research area is volatile metabolite yeast strain wine biol aging; Flor yeast; GC-MS analysis; Heatmap; Sherry wine; Volatile compound.

Sherry white wine called Fino is produced by dynamic biol. ageing under the action of flor yeasts using traditional practices aimed at ensuring uniform quality and characteristics over time. These kinds of yeasts provide typical sensory properties to Fino wines. Although there are studies of the volatile composition of these wines submitted to biol. ageing in wood barrels, there is a lack of knowledge on the particular volatile profile produced by different flor yeast strains from Sherry zone wineries. For this reason, the aim of this study was to analyze the volatile profiles produced by 15 pure culture flor velum yeasts, with the goal of observing their suitability for obtaining high quality Fino sherry wines. Volatile composition was determined by dual sequential stir bar sorptive extraction, followed by GC-MS anal. All yeast strains studied produced the increase of most acetals, highlighting acetaldehyde diethylacetal which was the compound that most increased. Among terpenes, nerolidol and farnesol underwent remarkable increases. However, results showed that in a month of biol. ageing, significant differences were observed among the volatile metabolites produced by flor yeast strains studied. Only some of them stood out for their high production of volatile compounds characteristic of Sherry Fino wines, which are good candidates for producing starter cultures.

Food Research International published new progress about Metabolites. 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, SDS of cas: 6259-76-3.

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

Zhang, Hui-Fen published the artcileChemical modification of montan resin by peracetic acid and agricultural application of its modified products, Computed Properties of 929-77-1, the main research area is montan resin peracetic acid chem modification.

This study attempted to chem. modify MR using the oxidation of peracetic acid, resulting that the MR hydrophilicity was significantly improved, and a water-soluble product (WSP) was obtained. The optimized oxidation conditions of MR, including the reaction temperature (X1), reaction time (X2), weight ratio of oxidant and montan resin (X3), and oxidant concentration (X4), were determined using single-factor experiments and response surface anal. The modification degree was evaluated using elemental and oil-water partition coefficient analyses, IR (IR) spectroscopy, and gas chromatog.-mass spectrometry (GC-MS), revealing that the oil-water partition coefficient of the modified product decreased and that the number of chem. constituents with oxygen-containing functional groups clearly increased after modification. Furthermore, the WSP was tested its effects on germination and seedling growth of the wheat seed. Compared with the control group, the WSP showed a promoting effect on the growth and germination of wheat. The WSP concentrations of 600 mg·L-1 and 300 mg·L-1 had the most substantial effect on the root and seedling growth of wheat, resp.

Journal of the Air & Waste Management Association published new progress about Germination. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Computed Properties of 929-77-1.

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

Wang, Shuyan published the artcileComparison of volatiles in different jasmine tea grade samples using electronic nose and automatic thermal desorption-gas chromatography-mass spectrometry followed by multivariate statistical analysis, Recommanded Product: Benzyl acetate, the main research area is jasmine tea volatile electronic nose ATDGCMS multivariate; Chinese jasmine tea; automatic thermal desorption-gas-chromatography- mass spectrometry (ATD-GC-MS); electronic nose (E-nose); multivariate statistical analysis; tea grade; volatile organic compounds.

Chinese jasmine tea is a type of flower-scented tea, which is produced by mixing green tea with the Jasminum sambac flower repeatedly. Both the total amount and compound of volatiles absorbed from the Jasminum sambac flower are mostly responsible for its sensory quality grade. This study aims to compare volatile organic compound (VOC) differences in authoritative jasmine tea grade samples. Automatic thermal desorption-gas-chromatog.-mass spectrometry (ATD-GC-MS) and electronic nose (E-nose), followed by multivariate data anal. is conducted. Consequently, specific VOCs with a pos. or neg. correlation to the grades are screened out. Partial least squares-discriminant anal. (PLS-DA) and hierarchical cluster anal. (HCA) show a satisfactory discriminant effect on rank. It is intriguing to find that the E-nose is good at distinguishing the grade difference caused by VOC concentrations but is deficient in identifying essential aromas that attribute to the unique characteristics of excellent grade jasmine tea.

Molecules published new progress about Gas sensors. 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

Zhang, Zhi published the artcilePreparation and characterisation of ordered mesoporous SO2-4/Al2O3 and its catalytic activity in the conversion of furfuryl alcohol to ethyl levulinate, Application In Synthesis of 539-88-8, the main research area is mesoporous SO24 Al2O3 catalytic furfuryl alc ethyl levulinate.

A series of ordered mesoporous SO42-/Al2O3 (OMSA) solid super acid catalysts were prepared by evaporation-induced self-assembly (EISA) method, followed by sulfonation at different calcination temperatures (400°C-900 °C). The results of transmission electron microscopy (TEM) and small-angle X-ray diffraction (XRD) indicated that all of the OMSAs possessed ordered mesoporous structures. The N2-Brunauer-Emmett-Teller (N2-BET) results showed that the sp. surface area of OMSAs could reach up to 160-380 m2/g, and the average pore diameters fall into the range between 8.6 and 9.8 nm. The temperature-programmed desorption of ammonia (NH3-TPD) characterization proofed that the OMSAs contained super acid, and ammonia desorption by the super acid in the OMSA calcined at 600 °C reached 25.9 cm3/g STP. The pyridine adsorption IR (Py-IR) indicated that all of the OMSAs consisted mainly of Lewis acids. The OMSA was used to catalyze furfuryl alc. in the synthesis of Et levulinate (EL). The maximum yield (80.6%) was obtained in the reaction conducted at 200 °C for 3 h. The reusability of the catalyst was proofed after four times of reuse as its activity was maintained with a yield of 71.2%.

Journal of Solid State Chemistry published new progress about Ethanolysis. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

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