Category: esters-buliding-blocks

Gong, Chen published the artcileProduction of levulinic acid and ethyl levulinate from cellulosic pulp derived from the cooking of lignocellulosic biomass with active oxygen and solid alkali, Application of Ethyl 4-oxopentanoate, the main research area is levulinic acid ethyl levulinate cellulosic pulp oxygen lignocellulosic biomass.

Biomass-derived levulinic acid (LA) and its esters are currently envisaged as versatile, renewable platform chems. In this study, cellulosic pulp derived from the cooking of lignocellulosic biomass with active oxygen and solid alkali was employed as raw material for the formation of LA or Et levulinate (EL). This pretreatment process is highly effective for the delignification and deconstruction of lignocellulose matrix, making a facile degradation of the resulting cellulosic pulp to LA or EL. At this point, the acid-catalyzed hydrolysis or ethanolysis of cellulosic pulp was optimized by response surface methodol. (RSM), offering desirable LA yield of 65.3% or EL yield of 62.7%, which is significantly higher than those obtained from raw biomass. More importantly, coking behavior on the inwall of the reactor was eliminated during the hydrolysis or ethanolysis of cellulosic pulp, which is one of the top challenges for the acid-catalyzed conversion of biomass in an industrial scale.

Korean Journal of Chemical Engineering published new progress about Bamboo. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application of Ethyl 4-oxopentanoate.

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

Nadeeshani, Harshani published the artcileProximate composition, fatty acid profile, vitamin and mineral content of selected banana varieties grown in Sri Lanka, Application of Methyl decanoate, the main research area is banana fatty acid vitamin mineral composition.

Nearly 30 varieties of banana (Musa spp.) are grown in Sri Lanka while it is the most produced and traded fruit in fresh form in the world. In the present study, five banana varieties commonly grown in Sri Lanka were evaluated for their nutritional composition Fruits were collected using stratified random sampling design from all agro-climatic zones, sorted and cleaned. Composite samples were prepared by oven drying a portion of the sample at 45°C while the rest was freeze-dried. Proximate composition, fatty acid profile and vitamin composition were determined using standard procedures and presented on fresh weight basis. Total carbohydrate, protein and dietary fiber contents of studied banana varieties were 13.46-26.46, 0.14-0.2 and 1.97-2.49%, resp. Major fatty acids observed in Musa spp. were palmitic, linoleic, α-linolenic, oleic, stearic, palmitoleic and myristic acids. Vitamin A and E contents were higher than other fat-soluble vitamins. Among studied banana varieties, the nutritional significance of Puwalu was upheld by the highest quantities of fat-soluble vitamins and polyunsaturated fatty acids while the nutritional significance of Kolikuttu was upheld by the highest quantities of protein, dietary fiber, thiamine and riboflavin. Ambul kesel was observed to contain the highest vitamin C content among studied banana varieties.

Journal of Food Composition and Analysis published new progress about Banana. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Application of Methyl decanoate.

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

Nadeeshani, Harshani published the artcileProximate composition, fatty acid profile, vitamin and mineral content of selected banana varieties grown in Sri Lanka, COA of Formula: C9H18O2, the main research area is banana fatty acid vitamin mineral composition.

Nearly 30 varieties of banana (Musa spp.) are grown in Sri Lanka while it is the most produced and traded fruit in fresh form in the world. In the present study, five banana varieties commonly grown in Sri Lanka were evaluated for their nutritional composition Fruits were collected using stratified random sampling design from all agro-climatic zones, sorted and cleaned. Composite samples were prepared by oven drying a portion of the sample at 45°C while the rest was freeze-dried. Proximate composition, fatty acid profile and vitamin composition were determined using standard procedures and presented on fresh weight basis. Total carbohydrate, protein and dietary fiber contents of studied banana varieties were 13.46-26.46, 0.14-0.2 and 1.97-2.49%, resp. Major fatty acids observed in Musa spp. were palmitic, linoleic, α-linolenic, oleic, stearic, palmitoleic and myristic acids. Vitamin A and E contents were higher than other fat-soluble vitamins. Among studied banana varieties, the nutritional significance of Puwalu was upheld by the highest quantities of fat-soluble vitamins and polyunsaturated fatty acids while the nutritional significance of Kolikuttu was upheld by the highest quantities of protein, dietary fiber, thiamine and riboflavin. Ambul kesel was observed to contain the highest vitamin C content among studied banana varieties.

Journal of Food Composition and Analysis published new progress about Banana. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, COA of Formula: C9H18O2.

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

Nadeeshani, Harshani published the artcileProximate composition, fatty acid profile, vitamin and mineral content of selected banana varieties grown in Sri Lanka, Application of Methyl docosanoate, the main research area is banana fatty acid vitamin mineral composition.

Nearly 30 varieties of banana (Musa spp.) are grown in Sri Lanka while it is the most produced and traded fruit in fresh form in the world. In the present study, five banana varieties commonly grown in Sri Lanka were evaluated for their nutritional composition Fruits were collected using stratified random sampling design from all agro-climatic zones, sorted and cleaned. Composite samples were prepared by oven drying a portion of the sample at 45°C while the rest was freeze-dried. Proximate composition, fatty acid profile and vitamin composition were determined using standard procedures and presented on fresh weight basis. Total carbohydrate, protein and dietary fiber contents of studied banana varieties were 13.46-26.46, 0.14-0.2 and 1.97-2.49%, resp. Major fatty acids observed in Musa spp. were palmitic, linoleic, α-linolenic, oleic, stearic, palmitoleic and myristic acids. Vitamin A and E contents were higher than other fat-soluble vitamins. Among studied banana varieties, the nutritional significance of Puwalu was upheld by the highest quantities of fat-soluble vitamins and polyunsaturated fatty acids while the nutritional significance of Kolikuttu was upheld by the highest quantities of protein, dietary fiber, thiamine and riboflavin. Ambul kesel was observed to contain the highest vitamin C content among studied banana varieties.

Journal of Food Composition and Analysis published new progress about Banana. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Application of Methyl docosanoate.

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

Windes, S. published the artcileComprehensive Analysis of Different Contemporary Barley Genotypes Enhances and Expands the Scope of Barley Contributions to Beer Flavor, Computed Properties of 111-11-5, the main research area is barley genotype beer.

Recent research has demonstrated contributions of barley genotype to beer flavor based on the progeny of a cross between an heirloom and a more contemporary barley variety. To advance this line of research, the current study used two independent sets of barley germplasm to address the contributions of different barley genotypes to beer flavor. Pedigree, quality of malt and beer, and beer metabolomic profiles were compared within and between the two sets. Utilizing both laboratory and consumer panels, differences in sensory attributes of malt hot steeps and lager beers that are attributable to barley genotype were investigated. Genotype, in this context, is defined in the broadest sense to include exptl. germplasm and released varieties. Results concur with previous studies: the two sets of barley germplasm were found to have, both within and between, distinct but subtle differences in flavor profiles of malt hot steeps and finished lager beers. Distinct metabolomic profiles, attributable to barley genotype, were detected. Further, covariation of metabolomic profiles and sensory attributes were identified using data from both sensory panels. These observations lead to the conclusion that the variable metabolites observed among the two sets of barley germplasm are a direct result of genetic differences that lead to differential chem. responses within the malting and brewing processes.

Journal of the American Society of Brewing Chemists published new progress about Barley. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Computed Properties of 111-11-5.

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

Kumar, Mohit published the artcilePyrolysis of Sugarcane (Saccharum officinarum L.) Leaves and Characterization of Products, COA of Formula: C9H18O2, the main research area is pyrolysis sugarcane saccharum officinarum leaf characterization product.

The finite nature, regional availability, and environmental problems associated with the use of fossil fuels have forced all countries of the world to look for renewable eco-friendly alternatives. Agricultural waste biomasses, generated through the cultivation of cereal and noncereal crops, are being considered renewable and viable alternatives to fossil fuels. In view of this, there has been a global spurt in research efforts for using abundantly available agricultural wastes as feedstocks for obtaining energy and value-added products through biochem. and thermal conversion routes. In the present work, the thermochem. characteristics and thermal degradation behavior of sugarcane leaves (SCL) and tops were studied. The batch pyrolysis was carried out in a fixed-bed tubular reactor to obtain biochar, bio-oil, and pyrolytic gas. Effects of bed height (4-16 cm), particle size (0.180-0.710 mm), heating rate (15-30°C/min), and temperature (350-650°C) were investigated. The maximum yields of bio-oil (44.7%), biogas (36.67%), and biochar (36.82%) were obtained at 550, 650, and 350°C, resp., for a 16 cm deep bed of particles of size 0.18-0.30 mm at the heating rate of 25°C/min. The composition of bio-oil was analyzed using Fourier transform IR spectroscopy (FTIR), proton NMR (1H NMR), and gas chromatog.-mass spectrometry (GC-MS) techniques. Several aliphatic, aromatic, phenolic, ketonic, and other acidic compounds were found in the bio-oil. The biochar had a highly porous structure and several micronutrients, making it useful as a soil conditioner. In the middle temperature ranges, biogas had more methane and CO and less hydrogen, but at higher temperatures, hydrogen was predominant.

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

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

Tian, Tian-Tian published the artcileMulti-objective evaluation of freshly distilled brandy: Characterisation and distribution patterns of key odour-active compounds, Related Products of esters-buliding-blocks, the main research area is distilled brandy odor stillage 3methylbutanol ethyl hexanoate octanoate; AD, aroma descriptor; AEDA, aroma extract dilution analysis; Distillation cut; FD, flavor dilution; Freshly distilled brandy; GC-O-MS, gas chromatography-olfactometry-mass spectrometry; HS-SPME, headspace solid-phase microextraction; MS, mass spectra; OAV, odour activity value; Odour-active compounds; PCA, principal component analysis; PLS-DA, partial least squares discriminant analysis; Partial least squares discriminant analysis; Principal component analysis; RI, retention indices; SAFE, solvent-assisted flavour evaporation; Std, standards; VIP, variable importance in projection.

The characterization and distribution patterns of key odor-active compounds in head, heart1, heart2, tail, and stillage cuts of freshly distilled brandy were investigated by gas chromatog.-olfactometry-mass spectrometry coupled with aroma extract dilution anal. (AEDA) and chemometrics anal. Results from AEDA showed that there were 50, 61, 48, 25, and 18 odor-active compounds in the head, heart1, heart2, tail, and stillage cuts, resp. Besides, 19, 22, 11, 5, and 4 quantified compounds with odor activity values ≥ 1, resp., were considered to be potential contributors to the aroma profile of different distillation cuts. Especially, the chemometrics anal. illustrated the heart1 fraction was characterized by 3-methylbutanol, Et hexanoate, 1-hexanol, Et octanoate, benzaldehyde, Et decanoate, and 2-phenylethyl acetate; (E)-hex-3-en-1-ol, (Z)-hex-3-en-1-ol, and 2-phenylethyl acetate greatly contributed to the characteristics of the heart2 cut. Furthermore, different volatile compounds with a variety of b.ps. and solubilities followed diverse distillation rules during the second distillation Our findings may provide a rational basis for concentrating more pleasant aroma components contributing to brandy.

Food Chemistry: X published new progress about Brandy. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Related Products of esters-buliding-blocks.

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

Tian, Tian-Tian published the artcileMulti-objective evaluation of freshly distilled brandy: Characterisation and distribution patterns of key odour-active compounds, Formula: C11H22O2, the main research area is distilled brandy odor stillage 3methylbutanol ethyl hexanoate octanoate; AD, aroma descriptor; AEDA, aroma extract dilution analysis; Distillation cut; FD, flavor dilution; Freshly distilled brandy; GC-O-MS, gas chromatography-olfactometry-mass spectrometry; HS-SPME, headspace solid-phase microextraction; MS, mass spectra; OAV, odour activity value; Odour-active compounds; PCA, principal component analysis; PLS-DA, partial least squares discriminant analysis; Partial least squares discriminant analysis; Principal component analysis; RI, retention indices; SAFE, solvent-assisted flavour evaporation; Std, standards; VIP, variable importance in projection.

The characterization and distribution patterns of key odor-active compounds in head, heart1, heart2, tail, and stillage cuts of freshly distilled brandy were investigated by gas chromatog.-olfactometry-mass spectrometry coupled with aroma extract dilution anal. (AEDA) and chemometrics anal. Results from AEDA showed that there were 50, 61, 48, 25, and 18 odor-active compounds in the head, heart1, heart2, tail, and stillage cuts, resp. Besides, 19, 22, 11, 5, and 4 quantified compounds with odor activity values ≥ 1, resp., were considered to be potential contributors to the aroma profile of different distillation cuts. Especially, the chemometrics anal. illustrated the heart1 fraction was characterized by 3-methylbutanol, Et hexanoate, 1-hexanol, Et octanoate, benzaldehyde, Et decanoate, and 2-phenylethyl acetate; (E)-hex-3-en-1-ol, (Z)-hex-3-en-1-ol, and 2-phenylethyl acetate greatly contributed to the characteristics of the heart2 cut. Furthermore, different volatile compounds with a variety of b.ps. and solubilities followed diverse distillation rules during the second distillation Our findings may provide a rational basis for concentrating more pleasant aroma components contributing to brandy.

Food Chemistry: X published new progress about Brandy. 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

Tian, Tian-Tian published the artcileMulti-objective evaluation of freshly distilled brandy: Characterisation and distribution patterns of key odour-active compounds, HPLC of Formula: 111-11-5, the main research area is distilled brandy odor stillage 3methylbutanol ethyl hexanoate octanoate; AD, aroma descriptor; AEDA, aroma extract dilution analysis; Distillation cut; FD, flavor dilution; Freshly distilled brandy; GC-O-MS, gas chromatography-olfactometry-mass spectrometry; HS-SPME, headspace solid-phase microextraction; MS, mass spectra; OAV, odour activity value; Odour-active compounds; PCA, principal component analysis; PLS-DA, partial least squares discriminant analysis; Partial least squares discriminant analysis; Principal component analysis; RI, retention indices; SAFE, solvent-assisted flavour evaporation; Std, standards; VIP, variable importance in projection.

The characterization and distribution patterns of key odor-active compounds in head, heart1, heart2, tail, and stillage cuts of freshly distilled brandy were investigated by gas chromatog.-olfactometry-mass spectrometry coupled with aroma extract dilution anal. (AEDA) and chemometrics anal. Results from AEDA showed that there were 50, 61, 48, 25, and 18 odor-active compounds in the head, heart1, heart2, tail, and stillage cuts, resp. Besides, 19, 22, 11, 5, and 4 quantified compounds with odor activity values ≥ 1, resp., were considered to be potential contributors to the aroma profile of different distillation cuts. Especially, the chemometrics anal. illustrated the heart1 fraction was characterized by 3-methylbutanol, Et hexanoate, 1-hexanol, Et octanoate, benzaldehyde, Et decanoate, and 2-phenylethyl acetate; (E)-hex-3-en-1-ol, (Z)-hex-3-en-1-ol, and 2-phenylethyl acetate greatly contributed to the characteristics of the heart2 cut. Furthermore, different volatile compounds with a variety of b.ps. and solubilities followed diverse distillation rules during the second distillation Our findings may provide a rational basis for concentrating more pleasant aroma components contributing to brandy.

Food Chemistry: X published new progress about Brandy. 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

Xie, Zean published the artcileSeparation of methyl glycosides and glycerol from aqueous fraction of methyl bio-oils using nanofiltration, Category: esters-buliding-blocks, the main research area is methyl glycoside glycerol aqueous fraction bio oil nanofiltration.

The feasibility of separating small mol. organic compounds in the aqueous fraction of Me bio-oils (AFMBO) using nanofiltration (NF) and reverse osmosis (RO) membranes was studied. Four kinds of com. available NF and RO membranes were studied preliminarily by using model solutions (aqueous solution of Me glycosides and glycerol). The membrane module was spiral wound, which is a more suitable format for industrialization than the flat-sheet format for dead-end filtration. The NF400-600 membrane exhibited the best separation performance; the permeate flux was 48.6 L/(m2·h), the Me glucosides (MEG) rejection ratio was 95.4%, and the transmission of glycerol was 81.0% with an initial concentration of 10 g/L (0.4 MPa, 45 °C). Compared with the model solution, the NF performance of AFMBO, which included permeate flux, rejection of MEG, transmission of glycerol, and separation of the other components in AFMBO, was investigated. The more complex constituents of AFMBO led to NF400-600 permeability and separating property decline compared with the model solution in the same operating conditions; meanwhile more serious and even irreversible membrane fouling occurred. This research provided a reference for membrane separation industrial feasibility and application of AFMBO.

BioResources published new progress about Fouling. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Category: esters-buliding-blocks.

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