Tag: M.W=150-200

Park, Min Kyung published the artcileComparison of volatile profiles in Fagopyrum esculentum (buckwheat) soksungjang prepared with different starter cultures during fermentation, HPLC of Formula: 110-42-9, the main research area is Fagopyrum pentanoic acid dimethyl carbonate Bacillus Lactobacillus food fermentation; Fermentation; Partial least squares-discriminant analysis; Soksungjang; Soybean koji; Volatile profiles.

This study investigated the differences and changes in the volatile profiles of buckwheat soksungjang (BS) inoculated with multiple microbial starters (Lactobacillus brevis + Aspergillus oryzae, BS-LA vs. Lactobacillus brevis + Bacillus amyloliquefaciens, BS-LB) during fermentation using SPME coupled with GC-MS and partial least square-discriminant anal. BS samples fermented for 5 wk could be differentiated from other BS samples with shorter fermentation periods, and the BS-LA and BS-LB samples fermented for 5 wk were separated Acids, benzenes, and esters were main volatile compounds in both BS samples, however, their differences and changes were varied. The increase of 3-methylbutanoic acid was bigger in BS-LB than BS-LA, while the contents of 2- and 3-methylbutanal were relatively higher in BS-LA than BS-LB. Furthermore, the contents of esters of BS-LA significantly increased during fermentation These results indicate that the volatile profiles of BS samples depend on the fermentation periods and the combination of microbial starters.

Food Science and Biotechnology published new progress about Aspergillus oryzae. 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

Park, Min Kyung published the artcileComparison of volatile profiles in Fagopyrum esculentum (buckwheat) soksungjang prepared with different starter cultures during fermentation, Name: Methyl octanoate, the main research area is Fagopyrum pentanoic acid dimethyl carbonate Bacillus Lactobacillus food fermentation; Fermentation; Partial least squares-discriminant analysis; Soksungjang; Soybean koji; Volatile profiles.

This study investigated the differences and changes in the volatile profiles of buckwheat soksungjang (BS) inoculated with multiple microbial starters (Lactobacillus brevis + Aspergillus oryzae, BS-LA vs. Lactobacillus brevis + Bacillus amyloliquefaciens, BS-LB) during fermentation using SPME coupled with GC-MS and partial least square-discriminant anal. BS samples fermented for 5 wk could be differentiated from other BS samples with shorter fermentation periods, and the BS-LA and BS-LB samples fermented for 5 wk were separated Acids, benzenes, and esters were main volatile compounds in both BS samples, however, their differences and changes were varied. The increase of 3-methylbutanoic acid was bigger in BS-LB than BS-LA, while the contents of 2- and 3-methylbutanal were relatively higher in BS-LA than BS-LB. Furthermore, the contents of esters of BS-LA significantly increased during fermentation These results indicate that the volatile profiles of BS samples depend on the fermentation periods and the combination of microbial starters.

Food Science and Biotechnology published new progress about Aspergillus oryzae. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Name: Methyl octanoate.

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

Dandajeh, Hamisu Adamu published the artcileInfluence of combustion characteristics and fuel composition on exhaust PAHs in a compression ignition engine, COA of Formula: C11H22O2, the main research area is polycyclic aromatic hydrocarbon combustion compression ignition engine.

This paper reports an exptl. investigation into the effects of fuel composition on the exhaust emission of toxic polycyclic aromatic hydrocarbons (PAHs) from a diesel engine, operated at both constant fuel injection and constant fuel ignition modes. The paper quantifies the US EPA (United State Environmental Protection Agency) 16 priority PAHs produced from combustion of fossil diesel fuel and several model fuel blends of n-heptane, toluene and Me decanoate in a single-cylinder diesel research engine based on a com. light duty automotive engine. It was found that the level of total PAHs emitted by the various fuel blends decreased with increasing fuel ignition delay and premixed burn fraction, however, where the ignition delay of a fuel blend was decreased with use of an ignition improving additive the level of particulate phase PAH also decreased. Increasing the level of toluene present in the fuel blends decreased levels of low toxicity of two to four ring PAH, while displacing n-heptane with Me decanoate increased particulate phase adsorbed PAH. Overall, the composition of the fuels investigated was found to have more influence on the concentration of exhaust PAHs formed than that of combustion characteristics, including ignition delay, peak heat release rate and the extent of the premixed burn fractions.

Energies (Basel, Switzerland) published new progress about Automotive engines. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, COA of Formula: C11H22O2.

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

Rodriguez-Donis, Ivonne published the artcileModelling and experimental validation of dimethyl carbonate solvent recovery from an aroma mixture by batch distillation, SDS of cas: 140-11-4, the main research area is aroma mixture dimethyl carbonate solvent recovery batch distillation.

Modeling and exptl. validation of solvent recovery from an aroma mixture by batch distillation process is presented, with particular emphasis of the effect of the prediction of the physicochem. properties and the phase equilibrium data on the content of the aroma compounds in the distillate cuts. The illustrative case study refers to an industrial batch distillation to recover di-Me carbonate (DMC) from an extract generated by a solvent extraction process involving variable natural raw materials for tailored perfume and fragrance applications. Due to the high number of aroma compounds in natural extracts, a synthetic mixture containing six target aroma compounds (α-pinene, eucalyptol, linalool, cis-3-hexenol, fenchone and benzyl acetate) was mixed with DMC for the modeling and exptl. studies of the batch distillation process. The methodol. is tested through the simulation of the process with BatchColumn software. As physicochem. properties of the aroma compounds and the vapor-liquid equilibrium (VLE) of all involved mixtures are required for simulation study, group contribution methods are used to predict missing properties such as vapor pressure, vaporisation enthalpy and liquid and vapor heat capacities. Simulation results are in good agreement with experiments carried out in a fully automated batch distillation column at 15 kPa and help optimize the industrial process operation. The proposed methodol. can be applied for the design of other solvent recovery process in fragrance industry.

Chemical Engineering Research and Design published new progress about Batch distillation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, SDS of cas: 140-11-4.

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

Tharmasothirajan, Apilaasha published the artcileMicrobial Polyphenol Production in a Biphasic Process, HPLC of Formula: 110-42-9, the main research area is microbial polyphenol biphasic fermentation.

Microbial synthesis of aromatic compounds is generally limited by inherent product toxicity toward the producing cells. Here, in situ extractive strategies represent an efficient approach to avoid such toxic effects and to increase the overall process performance. We conducted a solvent screening to identify suitable organic solvents to develop a biphasic extractive strategy for microbial plant polyphenol production using Corynebacterium glutamicum. From 10 pre-selected organic solvents, tributyrin (TB) showed the best biocompatibility and was chosen for the biphasic extraction process due to its beneficial effect on partitioning and solubility of the plant polyphenol resveratrol. In bioreactors, biphasic cultivation with TB allowed for a product titer of 7.5 mM (1.71 g L-1) resveratrol with a volumetric productivity of 0.26 mM h-1 and a product yield of 0.92 mol mol-1. This biphasic cultivation procedure can be directly employed for the synthesis of other aromatics with similar properties using C. glutamicum.

ACS Sustainable Chemistry & Engineering published new progress about Batch fermentation. 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

Dietz, Christina published the artcileExploring the multisensory perception of terpene alcohol and sesquiterpene rich hop extracts in lager style beer, Application of Methyl octanoate, the main research area is Humulus lager style beer sensory perception terpene alc sesquiterpene; Bitterness; Hop oil fractions; Sensory descriptive analysis; Sensory interactions; Sweetness.

Understanding the contribution of hop essential oil to the multisensory profile of beer is known to be challenging because of its chem. and sensory complexity. Limited research has been conducted investigating hop-derived volatiles’ role in the modulation of taste and mouthfeel sensations. Supercritical CO2 can be used to extract specific fractions from hop oil, thereby enabling the localisation of compounds responsible for different sensory impressions. Terpene alc. and sesquiterpene fractions were extracted from a Magnum hop oil and further fractionated into seven sub-fractions and individual compounds All extracts were evaluated in lager (4.5% volume/volume) by a trained panel (n = 10) using a newly developed attribute lexicon and following a sensory descriptive anal. approach. The sensory data was analyzed using ANOVA, followed by Tukey’s test (HSD) and correlated with chem. profile data obtained by gas chromatog.-mass spectrometry (GC-MS) by Principal Component Anal. The study revealed evidence for hop extracts to impart multisensory characteristics to beer due to sensory interactions within and across modalities. The monoterpene alcs.-rich fractions and particularly geraniol, added fruity- and floral aromas and flavours, modified the sweetness and induced a smooth bitterness in the beer matrix. Flavouring the beer with sesquiterpene fractions resulted in a harsh bitterness sensation. Contrary to previous findings, the humulene epoxides fraction appeared to have limited effects on lingering bitterness and astringency, illustrating the need for temporal sensory assessments in future studies. This research shows that splitting hop oil into fractions and sub-fractions provides a source of natural, sustainable flavouring preparations with distinct sensory characteristics.

Food Research International published new progress about Beer (lager style). 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

Garmendia, Sofiem published the artcileSelf-catalyzed folding of single chain nanoparticles (SCNPs) by NHC-mediated intramolecular benzoin condensation, Application of Benzyl acetate, the main research area is styrene vinylbenzaldehyde vinylbenzylethylbenzimidazolium chloride based catalyst benzyl acetate preparation.

A self-catalyzed folding strategy to form single chain nanoparticles (SCNPs) was developed via an intramol. N-heterocyclic carbene (NHC)-mediated benzoin condensation. Benzaldehyde, styrene and benzimidazolium chloride units were randomly incorporated into a poly(ionic liquid)-based (PIL) copolymer precursor by reversible addition-fragmentation chain transfer (RAFT) copolymerization Post-chem. modification of this linear precursor by insertion of a non-innocent acetate counter-anion into the benzimidazolium moieties conferred thermolatent catalytic behavior owing to the equilibrium between benzimidazolium acetate units and corresponding NHC ones. Upon heating, catalytically active NHCs allowed the formation of benzoin-type intramol. cross-links, thus folding linear chains into SCNPs. NHC moieties became deactivated after cooling to room temperature, which enabled easy isolation and purification of the covalently and intramolecularly cross-linked SCNPs. Importantly, the latent NHC moieties were proven to retain their catalytic activity when arranged into SCNPs as evidenced through their reactivation by simple heating. The catalytic activity of these SCNPs was further confirmed by implementing another NHC-organocatalyzed reaction, namely, transesterification reaction between vinyl acetate and benzyl alc. This work represents the first example of catalysis by a parent linear precursor which drives its own folding and remains catalytically active.

Polymer Chemistry published new progress about Hydrodynamic radius. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application of Benzyl acetate.

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

Fernandez-Mateos, A. published the artcileRadical Cyclization of Epoxy Vinyl- and Allylsulfones Promoted by Titanocene Chloride, Name: Ethyl 5-methylhex-5-enoate, the main research area is radical cyclization epoxy vinyl allylsulfone titanocene.

A titanocene-mediated intramol. radical addition of different epoxy vinyl- and allylsulfones has been achieved. Five- and six-membered ring products were obtained in good to excellent yields in the presence of both 2.2 and 0.2 equiv of Cp2TiCl. A novel double-activation strategy allowed us to achieve small-size rings such as cyclobutanes and cyclopropanes.

Journal of Organic Chemistry published new progress about Radical cyclization. 39495-82-4 belongs to class esters-buliding-blocks, name is Ethyl 5-methylhex-5-enoate, and the molecular formula is C9H16O2, Name: Ethyl 5-methylhex-5-enoate.

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

Veloso, Ronice Alves published the artcileChemical composition and bioactivity of essential oil from Morinda citrifolia L. fruit, Synthetic Route of 106-32-1, the main research area is Morinda fruit essential oil chem composition.

Morinda citrifolia has aroused the interest of several research institutions due to its pharmacol. properties. The compounds biosynthesized can be explored as an alternative for control measures of plant pathogens causing leaf lesions in maize. The study aim at evaluating the potential effects of essential oil obtained from ripe fruits of M. citrifolia on Bipolaris maydis and Exserohilum turcicum isolated from maize plants. Ripe fruits were subjected to extraction of essential oil by hydrodistillation method and chem. composition was determined by gas chromatog./mass spectrometry. The yield of essential oil was 0.17% (v/w), and the main constituents identified were octanoic acid constitutes 82.2%, hexanoic acid 8.3%, 3-methylbutyl octanoate 4.2%, and Et etanoate 2.5%. Mycelial growth control in vitro and in vivo of B. maydis and E. turcicum spots diseases in maize plants was evaluated and the fruit of M. citrifolia was found to have potential essential oil with fungicidal activity at concentration 0.25%. With area under the disease progress curve (AUDPC) values lower than those observed in treatments with fungicide, the preventive control of leaf spot in B. maydis plants using essential oil of M. citrifolia showed biol. activities and therefore a source of mols. to be exploited that can minimize the severity of diseases.

Journal of Medicinal Plants Research published new progress about Aerosol fungicides. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Synthetic Route of 106-32-1.

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

Veloso, Ronice Alves published the artcileChemical composition and bioactivity of essential oil from Morinda citrifolia L. fruit, Recommanded Product: Methyl octanoate, the main research area is Morinda fruit essential oil chem composition.

Morinda citrifolia has aroused the interest of several research institutions due to its pharmacol. properties. The compounds biosynthesized can be explored as an alternative for control measures of plant pathogens causing leaf lesions in maize. The study aim at evaluating the potential effects of essential oil obtained from ripe fruits of M. citrifolia on Bipolaris maydis and Exserohilum turcicum isolated from maize plants. Ripe fruits were subjected to extraction of essential oil by hydrodistillation method and chem. composition was determined by gas chromatog./mass spectrometry. The yield of essential oil was 0.17% (v/w), and the main constituents identified were octanoic acid constitutes 82.2%, hexanoic acid 8.3%, 3-methylbutyl octanoate 4.2%, and Et etanoate 2.5%. Mycelial growth control in vitro and in vivo of B. maydis and E. turcicum spots diseases in maize plants was evaluated and the fruit of M. citrifolia was found to have potential essential oil with fungicidal activity at concentration 0.25%. With area under the disease progress curve (AUDPC) values lower than those observed in treatments with fungicide, the preventive control of leaf spot in B. maydis plants using essential oil of M. citrifolia showed biol. activities and therefore a source of mols. to be exploited that can minimize the severity of diseases.

Journal of Medicinal Plants Research published new progress about Aerosol fungicides. 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